From: gregor herrmann <gregor@toastfreeware.priv.at>
Date: Thu, 22 Nov 2018 23:34:23 +0000 (+0100)
Subject: Merge branch 'web'
X-Git-Url: https://git.toastfreeware.priv.at/chrisu/seepark.git/commitdiff_plain/c41b39636626c0fd80c06cec0508458c25b23873?hp=7bc31204e1355e06fc8be3c28563bb0c1c4441f7

Merge branch 'web'
---

diff --git a/seepark_webapp b/seepark_webapp
new file mode 100755
index 0000000..c7a57fa
--- /dev/null
+++ b/seepark_webapp
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+die() {
+	echo "$1" >&2
+	usage
+	exit 1
+}
+
+usage() {
+	echo "Usage: ./$ME <start|stop|restart>." >&2
+}
+
+ME=$(basename $0)
+DIR=$(dirname $0)
+ARG=$1
+
+set -eu
+
+[ -n "$ARG" ] || die "Missing argument."
+
+start() {
+	cd "$DIR/web"
+	SEEPARKINI=../../seewasser.ini waitress-serve --listen=[::1]:8765 'seepark_web:app' &
+}
+
+stop() {
+	killall waitress-serve
+}
+
+case "$ARG" in
+	start)
+		start
+		;;
+	stop)
+		stop
+		;;
+	restart)
+		stop
+		sleep 1
+		start
+		;;
+	help|-h|--help)
+		usage
+		;;
+	*)
+		die "Unknown argument '$ARG'." >&2
+		;;
+esac
+
+exit $?
diff --git a/web/README b/web/README
new file mode 100644
index 0000000..0ac72d1
--- /dev/null
+++ b/web/README
@@ -0,0 +1,36 @@
+Needed packages: (python3-flask python3-sqlalchemy) python3-mysqldb python3-flask-sqlalchemy
+
+Start with:
+FLASK_APP=seepark_web.py FLASK_DEBUG=1 SEEPARKINI=~/seewasser.ini flask run
+
+Option:
+-h 0.0.0.0
+at the end to listen on all interfaces, i.e.
+FLASK_APP=seepark_web.py FLASK_DEBUG=1 SEEPARKINI=~/seewasser.ini flask run -h 0.0.0.0
+(or :: instead of 0.0.0.0 for ipv4+ipv6)
+
+
+Go to:
+http://127.0.0.1:5000/
+or http://<ipaddress>:5000/
+if the app is running on a different machine
+
+---
+
+notes on a "production" server:
+
+needed: python3-waitress
+
+run (in folder web):
+SEEPARKINI=~/seewasser.ini waitress-serve --port 8765 'seepark_web:app'
+
+links:
+
+http://flask.pocoo.org/docs/1.0/tutorial/deploy/
+http://flask.pocoo.org/docs/1.0/tutorial/factory/
+https://github.com/pallets/flask/blob/1.0.2/examples/tutorial/flaskr/__init__.py
+
+https://docs.pylonsproject.org/projects/waitress/en/latest/
+https://docs.pylonsproject.org/projects/waitress/en/latest/runner.html#runner
+
+https://gr33ndata.blogspot.com/2012/01/waitress-flask.html
diff --git a/web/seepark_web.py b/web/seepark_web.py
new file mode 100644
index 0000000..b4c7749
--- /dev/null
+++ b/web/seepark_web.py
@@ -0,0 +1,289 @@
+import datetime
+import time
+import configparser
+import os
+import sys
+from collections import defaultdict
+from flask import Flask, render_template, jsonify, request, abort, Response
+import flask.json
+from flask_sqlalchemy import SQLAlchemy, inspect
+from sqlalchemy import func
+
+
+# https://stackoverflow.com/a/37350445
+def sqlalchemy_model_to_dict(model):
+    return {c.key: getattr(model, c.key)
+        for c in inspect(model).mapper.column_attrs}
+
+
+class JSONEncoder(flask.json.JSONEncoder):
+    def default(self, object):
+        if isinstance(object, datetime.datetime):
+            return object.isoformat()
+        elif isinstance(object, db.Model):
+            return sqlalchemy_model_to_dict(object)
+        return super().default(object)
+
+
+def parse_datetime(date_str):
+    return datetime.datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%S')
+
+
+def get_sqlalchemy_database_uri(config):
+    user = config.get('database', 'user')
+    pwd = config.get('database', 'password')
+    host = config.get('database', 'hostname')
+    db = config.get('database', 'database')
+    return 'mysql+mysqldb://{}:{}@{}/{}'.format(user, pwd, host, db)
+
+
+config = configparser.ConfigParser()
+config.read(os.environ['SEEPARKINI'])
+apikey = config.get('openweathermap', 'apikey')
+cityid = config.get('openweathermap', 'cityid')
+mainsensor = config.get('webapp', 'mainsensor')
+
+app = Flask(__name__)
+app.json_encoder = JSONEncoder
+app.config['SQLALCHEMY_DATABASE_URI'] = get_sqlalchemy_database_uri(config)
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+db = SQLAlchemy(app)
+db.reflect(app=app)
+
+
+class Sensors(db.Model):
+    __tablename__ = 'sensors'
+
+
+class OpenWeatherMap(db.Model):
+    __tablename__ = 'openweathermap'
+
+
+def calc_grouping_resolution(begin, end):
+    """How many data points should be between the timestamps begin and end?"""
+    # copied from munin/master/_bin/munin-cgi-graph.in
+    resolutions = dict(
+        day   =   300,
+        week  =  1800,
+        month =  7200,
+        year  = 86400,
+    )
+    duration = (end - begin).total_seconds()
+    day = 60 * 60 * 24
+    if duration <= day:
+        resolution = resolutions['day']
+    elif duration <= 7 * day:
+        resolution = resolutions['week']
+    elif duration <= 31 * day:
+        resolution = resolutions['month']
+    else:
+        resolution = resolutions['year']
+    return resolution
+
+
+def select_sensordata(sensor_id, sensor_type, begin, end):
+    query = Sensors.query
+    if sensor_id is not None:
+        query = query.filter(Sensors.sensor_id == sensor_id)
+    if sensor_type is not None:
+        query = query.filter(Sensors.value_type == sensor_type)
+    if begin is not None:
+        query = query.filter(Sensors.timestamp >= begin)
+    if end is not None:
+        query = query.filter(Sensors.timestamp <= end)
+    return query.all()
+
+
+def select_sensordata_grouped(sensor_id, sensor_type, begin, end):
+    # determine resolution (interval in seconds for data points)
+    resolution = calc_grouping_resolution(begin, end)
+
+    # Let the database do the grouping. Example in SQL (MySQL):
+    # select to_seconds(datetime) DIV (60*60*24) as interval_id, min(datetime), max(datetime), min(temp), avg(temp), max(temp), count(temp) from openweathermap group by interval_id order by interval_id;
+    query = db.session.query(func.to_seconds(Sensors.timestamp).op('div')(resolution).label('g'),
+            func.from_unixtime(func.avg(func.unix_timestamp(Sensors.timestamp))).label('timestamp'),
+            func.avg(Sensors.value).label('value'),
+            Sensors.sensor_id, Sensors.value_type, Sensors.sensor_name)
+    if sensor_id is not None:
+        query = query.filter(Sensors.sensor_id == sensor_id)
+    if sensor_type is not None:
+        query = query.filter(Sensors.value_type == sensor_type)
+    query = query.filter(Sensors.timestamp >= begin)
+    query = query.filter(Sensors.timestamp <= end)
+    query = query.group_by('g', Sensors.sensor_id, Sensors.value_type, Sensors.sensor_name)
+    return query.all()
+
+
+def select_openweatherdata(cityid, begin, end):
+    query = OpenWeatherMap.query.filter(OpenWeatherMap.cityid == cityid)
+    if begin is not None:
+        query = query.filter(OpenWeatherMap.datetime >= begin)
+    if end is not None:
+        query = query.filter(OpenWeatherMap.datetime <= end)
+    return query.all()
+
+
+def select_openweatherdata_grouped(cityid, begin, end):
+    # determine resolution (interval in seconds for data points)
+    resolution = calc_grouping_resolution(begin, end)
+
+    # Let the database do the grouping. Example in SQL (MySQL):
+    # select to_seconds(datetime) DIV (60*60*24) as interval_id, min(datetime), max(datetime), min(temp), avg(temp), max(temp), count(temp) from openweathermap group by interval_id order by interval_id;
+    query = db.session.query(func.to_seconds(OpenWeatherMap.datetime).op('div')(resolution).label('g'),
+            func.from_unixtime(func.avg(func.unix_timestamp(OpenWeatherMap.datetime))).label('datetime'),
+            func.avg(OpenWeatherMap.temp).label('temp'),
+            OpenWeatherMap.cityid)
+    OpenWeatherMap.query.filter(OpenWeatherMap.cityid == cityid)
+    query = query.filter(OpenWeatherMap.datetime >= begin)
+    query = query.filter(OpenWeatherMap.datetime <= end)
+    query = query.group_by('g', OpenWeatherMap.cityid)
+    return query.all()
+
+
+def convert_to_c3(result, id, field_x, field_y):
+    c3result = defaultdict(list)
+    for row in result:
+        c3result[str(getattr(row, id))].append(getattr(row, field_y))
+        dt = getattr(row, field_x).strftime('%Y-%m-%d %H:%M:%S')
+        c3result[str(getattr(row, id)) + '_x'].append(dt)
+    return c3result
+
+
+def request_arg(key, type, default=None):
+    """Returns the key from the request if available, otherwise the default value.
+    In case type is provided and the key is present, the value is converted by calling type.
+    In other words: Reimplement request.args.get but don't return default value if
+    type raises a ValueError."""
+    if key in request.args:
+        try:
+            return type(request.args[key])
+        except ValueError as e:
+            abort(Response(str(e), 400))
+    else:
+        return default
+
+
+def sensordata(sensor_id=None, sensor_type=None):
+    begin = request_arg('begin', parse_datetime)
+    end = request_arg('end', parse_datetime)
+    mode = request.args.get('mode', 'full')
+    format = request.args.get('format', 'default')
+
+    if mode == 'full':
+        result = select_sensordata(sensor_id, sensor_type, begin, end)
+    elif mode == 'consolidated':
+        if begin is None or end is None:
+            abort(Response('begin and end have to be set for mode==consolidated', 400))
+        result = select_sensordata_grouped(sensor_id, sensor_type, begin, end)
+    else:
+        abort(Response('unknown value for mode', 400))
+
+    if format == 'c3':
+        return convert_to_c3(result, 'sensor_id', 'timestamp', 'value')
+    return result
+
+
+def openweathermapdata(cityid):
+    begin = request_arg('begin', parse_datetime)
+    end = request_arg('end', parse_datetime)
+    mode = request.args.get('mode', 'full')
+    format = request.args.get('format', 'default')
+
+    if mode == 'full':
+        result = select_openweatherdata(cityid, begin, end)
+    elif mode == 'consolidated':
+        if begin is None or end is None:
+            abort(Response('begin and end have to be set for mode==consolidated', 400))
+        result = select_openweatherdata_grouped(cityid, begin, end)
+    else:
+        abort(Response('unknown value for mode', 400))
+
+    if format == 'c3':
+        return convert_to_c3(result, 'cityid', 'datetime', 'temp')
+    return result
+
+
+def currentairtemperature(cityid):
+    result = OpenWeatherMap.query.filter_by(cityid=cityid).order_by(OpenWeatherMap.datetime.desc()).first()
+    return result.temp, result.datetime
+
+
+def currentwatertemperature(sensorid):
+    result = Sensors.query.filter_by(sensor_id=sensorid).order_by(Sensors.timestamp.desc()).first()
+    return result.value, result.timestamp
+
+
+@app.route('/api/<version>/sensors/')
+def sensors(version):
+    """List all sensors found in the database"""
+    result = db.session.query(Sensors.sensor_id, Sensors.sensor_name, Sensors.value_type).distinct().all()
+    return jsonify(result)
+
+
+@app.route('/api/<version>/sensor/id/<sensor_id>')
+def sensorid(version, sensor_id):
+    """Return all data for a specific sensor
+
+    URL parameters:
+    begin=<datetime>, optional, format like "2018-05-19T21:07:53"
+    end=<datetime>, optional, format like "2018-05-19T21:07:53"
+    mode=<full|consolidated>, optional. return all rows (default) or with lower resolution (for charts)
+    format=<default|c3>, optional. return result as returned by sqlalchemy (default) or formatted for c3.js
+    """
+    result = sensordata(sensor_id=sensor_id)
+    return jsonify(result)
+
+
+@app.route('/api/<version>/sensor/type/<sensor_type>')
+def sensortype(version, sensor_type):
+    """Return all data for a specific sensor type
+
+    URL parameters:
+    begin=<datetime>, optional, format like "2018-05-19T21:07:53"
+    end=<datetime>, optional, format like "2018-05-19T21:07:53"
+    mode=<full|consolidated>, optional. return all rows (default) or with lower resolution (for charts)
+    format=<default|c3>, optional. return result as returned by sqlalchemy (default) or formatted for c3.js
+    """
+    result = sensordata(sensor_type=sensor_type)
+    return jsonify(result)
+
+
+@app.route('/api/<version>/openweathermap/cities')
+def openweathermap_cities(version):
+    """List all city IDs found in the database"""
+    result = db.session.query(OpenWeatherMap.cityid).distinct().all()
+    return jsonify(result)
+
+
+@app.route('/api/<version>/openweathermap/city/<cityid>')
+def openweathermap_city(version, cityid):
+    """List all data found for a city"""
+    result = openweathermapdata(cityid=cityid)
+    return jsonify(result)
+
+
+@app.route('/api/<version>/currentairtemperature')
+def currentair(version):
+    value, timestamp = currentairtemperature(cityid)
+    return jsonify({"value": value, "timestamp": timestamp})
+
+
+@app.route('/api/<version>/currentwatertemperature')
+def currentwater(version):
+    value, timestamp = currentwatertemperature(mainsensor)
+    return jsonify({"value": value, "timestamp": timestamp})
+
+
+@app.route("/")
+def index():
+    airvalue, airtime     = currentairtemperature(cityid)
+    watervalue, watertime = currentwatertemperature(mainsensor)
+
+    return render_template(
+        'seepark_web.html',
+        apikey=apikey,
+        watervalue=watervalue,
+        watertime=watertime,
+        airvalue=airvalue,
+        airtime=airtime,
+    )
diff --git a/web/static/c3.css b/web/static/c3.css
new file mode 100644
index 0000000..7f7cda8
--- /dev/null
+++ b/web/static/c3.css
@@ -0,0 +1,234 @@
+/*-- Chart --*/
+.c3 svg {
+  font: 10px sans-serif;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
+}
+
+.c3 path, .c3 line {
+  fill: none;
+  stroke: #000;
+}
+
+.c3 text {
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  user-select: none;
+}
+
+.c3-legend-item-tile,
+.c3-xgrid-focus,
+.c3-ygrid,
+.c3-event-rect,
+.c3-bars path {
+  shape-rendering: crispEdges;
+}
+
+.c3-chart-arc path {
+  stroke: #fff;
+}
+
+.c3-chart-arc rect {
+  stroke: white;
+  stroke-width: 1;
+}
+
+.c3-chart-arc text {
+  fill: #fff;
+  font-size: 13px;
+}
+
+/*-- Axis --*/
+/*-- Grid --*/
+.c3-grid line {
+  stroke: #aaa;
+}
+
+.c3-grid text {
+  fill: #aaa;
+}
+
+.c3-xgrid, .c3-ygrid {
+  stroke-dasharray: 3 3;
+}
+
+/*-- Text on Chart --*/
+.c3-text.c3-empty {
+  fill: #808080;
+  font-size: 2em;
+}
+
+/*-- Line --*/
+.c3-line {
+  stroke-width: 1px;
+}
+
+/*-- Point --*/
+.c3-circle._expanded_ {
+  stroke-width: 1px;
+  stroke: white;
+}
+
+.c3-selected-circle {
+  fill: white;
+  stroke-width: 2px;
+}
+
+/*-- Bar --*/
+.c3-bar {
+  stroke-width: 0;
+}
+
+.c3-bar._expanded_ {
+  fill-opacity: 1;
+  fill-opacity: 0.75;
+}
+
+/*-- Focus --*/
+.c3-target.c3-focused {
+  opacity: 1;
+}
+
+.c3-target.c3-focused path.c3-line, .c3-target.c3-focused path.c3-step {
+  stroke-width: 2px;
+}
+
+.c3-target.c3-defocused {
+  opacity: 0.3 !important;
+}
+
+/*-- Region --*/
+.c3-region {
+  fill: steelblue;
+  fill-opacity: 0.1;
+}
+
+/*-- Brush --*/
+.c3-brush .extent {
+  fill-opacity: 0.1;
+}
+
+/*-- Select - Drag --*/
+/*-- Legend --*/
+.c3-legend-item {
+  font-size: 12px;
+}
+
+.c3-legend-item-hidden {
+  opacity: 0.15;
+}
+
+.c3-legend-background {
+  opacity: 0.75;
+  fill: white;
+  stroke: lightgray;
+  stroke-width: 1;
+}
+
+/*-- Title --*/
+.c3-title {
+  font: 14px sans-serif;
+}
+
+/*-- Tooltip --*/
+.c3-tooltip-container {
+  z-index: 10;
+}
+
+.c3-tooltip {
+  border-collapse: collapse;
+  border-spacing: 0;
+  background-color: #fff;
+  empty-cells: show;
+  -webkit-box-shadow: 7px 7px 12px -9px #777777;
+  -moz-box-shadow: 7px 7px 12px -9px #777777;
+  box-shadow: 7px 7px 12px -9px #777777;
+  opacity: 0.9;
+}
+
+.c3-tooltip tr {
+  border: 1px solid #CCC;
+}
+
+.c3-tooltip th {
+  background-color: #aaa;
+  font-size: 14px;
+  padding: 2px 5px;
+  text-align: left;
+  color: #FFF;
+}
+
+.c3-tooltip td {
+  font-size: 13px;
+  padding: 3px 6px;
+  background-color: #fff;
+  border-left: 1px dotted #999;
+}
+
+.c3-tooltip td > span {
+  display: inline-block;
+  width: 10px;
+  height: 10px;
+  margin-right: 6px;
+}
+
+.c3-tooltip td.value {
+  text-align: right;
+}
+
+/*-- Area --*/
+.c3-area {
+  stroke-width: 0;
+  opacity: 0.2;
+}
+
+/*-- Arc --*/
+.c3-chart-arcs-title {
+  dominant-baseline: middle;
+  font-size: 1.3em;
+}
+
+.c3-chart-arcs .c3-chart-arcs-background {
+  fill: #e0e0e0;
+  stroke: #FFF;
+}
+
+.c3-chart-arcs .c3-chart-arcs-gauge-unit {
+  fill: #000;
+  font-size: 16px;
+}
+
+.c3-chart-arcs .c3-chart-arcs-gauge-max {
+  fill: #777;
+}
+
+.c3-chart-arcs .c3-chart-arcs-gauge-min {
+  fill: #777;
+}
+
+.c3-chart-arc .c3-gauge-value {
+  fill: #000;
+  /*  font-size: 28px !important;*/
+}
+
+.c3-chart-arc.c3-target g path {
+  opacity: 1;
+}
+
+.c3-chart-arc.c3-target.c3-focused g path {
+  opacity: 1;
+}
+
+/*-- Zoom --*/
+.c3-drag-zoom.enabled {
+  pointer-events: all !important;
+  visibility: visible;
+}
+
+.c3-drag-zoom.disabled {
+  pointer-events: none !important;
+  visibility: hidden;
+}
+
+.c3-drag-zoom .extent {
+  fill-opacity: 0.1;
+}
diff --git a/web/static/c3.js b/web/static/c3.js
new file mode 100644
index 0000000..04eb151
--- /dev/null
+++ b/web/static/c3.js
@@ -0,0 +1,9590 @@
+/* @license C3.js v0.6.7 | (c) C3 Team and other contributors | http://c3js.org/ */
+(function (global, factory) {
+    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+    typeof define === 'function' && define.amd ? define(factory) :
+    (global.c3 = factory());
+}(this, (function () { 'use strict';
+
+    function ChartInternal(api) {
+        var $$ = this;
+        $$.d3 = window.d3 ? window.d3 : typeof require !== 'undefined' ? require("d3") : undefined;
+        $$.api = api;
+        $$.config = $$.getDefaultConfig();
+        $$.data = {};
+        $$.cache = {};
+        $$.axes = {};
+    }
+
+    function Chart(config) {
+        var $$ = this.internal = new ChartInternal(this);
+        $$.loadConfig(config);
+
+        $$.beforeInit(config);
+        $$.init();
+        $$.afterInit(config);
+
+        // bind "this" to nested API
+        (function bindThis(fn, target, argThis) {
+            Object.keys(fn).forEach(function (key) {
+                target[key] = fn[key].bind(argThis);
+                if (Object.keys(fn[key]).length > 0) {
+                    bindThis(fn[key], target[key], argThis);
+                }
+            });
+        })(Chart.prototype, this, this);
+    }
+
+    function AxisInternal(component, params) {
+        var internal = this;
+        internal.component = component;
+        internal.params = params || {};
+
+        internal.d3 = component.d3;
+        internal.scale = internal.d3.scaleLinear();
+        internal.range;
+        internal.orient = "bottom";
+        internal.innerTickSize = 6;
+        internal.outerTickSize = this.params.withOuterTick ? 6 : 0;
+        internal.tickPadding = 3;
+        internal.tickValues = null;
+        internal.tickFormat;
+        internal.tickArguments;
+
+        internal.tickOffset = 0;
+        internal.tickCulling = true;
+        internal.tickCentered;
+        internal.tickTextCharSize;
+        internal.tickTextRotate = internal.params.tickTextRotate;
+        internal.tickLength;
+
+        internal.axis = internal.generateAxis();
+    }
+
+    AxisInternal.prototype.axisX = function (selection, x, tickOffset) {
+        selection.attr("transform", function (d) {
+            return "translate(" + Math.ceil(x(d) + tickOffset) + ", 0)";
+        });
+    };
+    AxisInternal.prototype.axisY = function (selection, y) {
+        selection.attr("transform", function (d) {
+            return "translate(0," + Math.ceil(y(d)) + ")";
+        });
+    };
+    AxisInternal.prototype.scaleExtent = function (domain) {
+        var start = domain[0],
+            stop = domain[domain.length - 1];
+        return start < stop ? [start, stop] : [stop, start];
+    };
+    AxisInternal.prototype.generateTicks = function (scale) {
+        var internal = this;
+        var i,
+            domain,
+            ticks = [];
+        if (scale.ticks) {
+            return scale.ticks.apply(scale, internal.tickArguments);
+        }
+        domain = scale.domain();
+        for (i = Math.ceil(domain[0]); i < domain[1]; i++) {
+            ticks.push(i);
+        }
+        if (ticks.length > 0 && ticks[0] > 0) {
+            ticks.unshift(ticks[0] - (ticks[1] - ticks[0]));
+        }
+        return ticks;
+    };
+    AxisInternal.prototype.copyScale = function () {
+        var internal = this;
+        var newScale = internal.scale.copy(),
+            domain;
+        if (internal.params.isCategory) {
+            domain = internal.scale.domain();
+            newScale.domain([domain[0], domain[1] - 1]);
+        }
+        return newScale;
+    };
+    AxisInternal.prototype.textFormatted = function (v) {
+        var internal = this,
+            formatted = internal.tickFormat ? internal.tickFormat(v) : v;
+        return typeof formatted !== 'undefined' ? formatted : '';
+    };
+    AxisInternal.prototype.updateRange = function () {
+        var internal = this;
+        internal.range = internal.scale.rangeExtent ? internal.scale.rangeExtent() : internal.scaleExtent(internal.scale.range());
+        return internal.range;
+    };
+    AxisInternal.prototype.updateTickTextCharSize = function (tick) {
+        var internal = this;
+        if (internal.tickTextCharSize) {
+            return internal.tickTextCharSize;
+        }
+        var size = {
+            h: 11.5,
+            w: 5.5
+        };
+        tick.select('text').text(function (d) {
+            return internal.textFormatted(d);
+        }).each(function (d) {
+            var box = this.getBoundingClientRect(),
+                text = internal.textFormatted(d),
+                h = box.height,
+                w = text ? box.width / text.length : undefined;
+            if (h && w) {
+                size.h = h;
+                size.w = w;
+            }
+        }).text('');
+        internal.tickTextCharSize = size;
+        return size;
+    };
+    AxisInternal.prototype.isVertical = function () {
+        return this.orient === 'left' || this.orient === 'right';
+    };
+    AxisInternal.prototype.tspanData = function (d, i, scale) {
+        var internal = this;
+        var splitted = internal.params.tickMultiline ? internal.splitTickText(d, scale) : [].concat(internal.textFormatted(d));
+
+        if (internal.params.tickMultiline && internal.params.tickMultilineMax > 0) {
+            splitted = internal.ellipsify(splitted, internal.params.tickMultilineMax);
+        }
+
+        return splitted.map(function (s) {
+            return { index: i, splitted: s, length: splitted.length };
+        });
+    };
+    AxisInternal.prototype.splitTickText = function (d, scale) {
+        var internal = this,
+            tickText = internal.textFormatted(d),
+            maxWidth = internal.params.tickWidth,
+            subtext,
+            spaceIndex,
+            textWidth,
+            splitted = [];
+
+        if (Object.prototype.toString.call(tickText) === "[object Array]") {
+            return tickText;
+        }
+
+        if (!maxWidth || maxWidth <= 0) {
+            maxWidth = internal.isVertical() ? 95 : internal.params.isCategory ? Math.ceil(scale(1) - scale(0)) - 12 : 110;
+        }
+
+        function split(splitted, text) {
+            spaceIndex = undefined;
+            for (var i = 1; i < text.length; i++) {
+                if (text.charAt(i) === ' ') {
+                    spaceIndex = i;
+                }
+                subtext = text.substr(0, i + 1);
+                textWidth = internal.tickTextCharSize.w * subtext.length;
+                // if text width gets over tick width, split by space index or crrent index
+                if (maxWidth < textWidth) {
+                    return split(splitted.concat(text.substr(0, spaceIndex ? spaceIndex : i)), text.slice(spaceIndex ? spaceIndex + 1 : i));
+                }
+            }
+            return splitted.concat(text);
+        }
+
+        return split(splitted, tickText + "");
+    };
+    AxisInternal.prototype.ellipsify = function (splitted, max) {
+        if (splitted.length <= max) {
+            return splitted;
+        }
+
+        var ellipsified = splitted.slice(0, max);
+        var remaining = 3;
+        for (var i = max - 1; i >= 0; i--) {
+            var available = ellipsified[i].length;
+
+            ellipsified[i] = ellipsified[i].substr(0, available - remaining).padEnd(available, '.');
+
+            remaining -= available;
+
+            if (remaining <= 0) {
+                break;
+            }
+        }
+
+        return ellipsified;
+    };
+    AxisInternal.prototype.updateTickLength = function () {
+        var internal = this;
+        internal.tickLength = Math.max(internal.innerTickSize, 0) + internal.tickPadding;
+    };
+    AxisInternal.prototype.lineY2 = function (d) {
+        var internal = this,
+            tickPosition = internal.scale(d) + (internal.tickCentered ? 0 : internal.tickOffset);
+        return internal.range[0] < tickPosition && tickPosition < internal.range[1] ? internal.innerTickSize : 0;
+    };
+    AxisInternal.prototype.textY = function () {
+        var internal = this,
+            rotate = internal.tickTextRotate;
+        return rotate ? 11.5 - 2.5 * (rotate / 15) * (rotate > 0 ? 1 : -1) : internal.tickLength;
+    };
+    AxisInternal.prototype.textTransform = function () {
+        var internal = this,
+            rotate = internal.tickTextRotate;
+        return rotate ? "rotate(" + rotate + ")" : "";
+    };
+    AxisInternal.prototype.textTextAnchor = function () {
+        var internal = this,
+            rotate = internal.tickTextRotate;
+        return rotate ? rotate > 0 ? "start" : "end" : "middle";
+    };
+    AxisInternal.prototype.tspanDx = function () {
+        var internal = this,
+            rotate = internal.tickTextRotate;
+        return rotate ? 8 * Math.sin(Math.PI * (rotate / 180)) : 0;
+    };
+    AxisInternal.prototype.tspanDy = function (d, i) {
+        var internal = this,
+            dy = internal.tickTextCharSize.h;
+        if (i === 0) {
+            if (internal.isVertical()) {
+                dy = -((d.length - 1) * (internal.tickTextCharSize.h / 2) - 3);
+            } else {
+                dy = ".71em";
+            }
+        }
+        return dy;
+    };
+
+    AxisInternal.prototype.generateAxis = function () {
+        var internal = this,
+            d3 = internal.d3,
+            params = internal.params;
+        function axis(g, transition) {
+            var self;
+            g.each(function () {
+                var g = axis.g = d3.select(this);
+
+                var scale0 = this.__chart__ || internal.scale,
+                    scale1 = this.__chart__ = internal.copyScale();
+
+                var ticksValues = internal.tickValues ? internal.tickValues : internal.generateTicks(scale1),
+                    ticks = g.selectAll(".tick").data(ticksValues, scale1),
+                    tickEnter = ticks.enter().insert("g", ".domain").attr("class", "tick").style("opacity", 1e-6),
+
+                // MEMO: No exit transition. The reason is this transition affects max tick width calculation because old tick will be included in the ticks.
+                tickExit = ticks.exit().remove(),
+                    tickUpdate = ticks.merge(tickEnter),
+                    tickTransform,
+                    tickX,
+                    tickY;
+
+                if (params.isCategory) {
+                    internal.tickOffset = Math.ceil((scale1(1) - scale1(0)) / 2);
+                    tickX = internal.tickCentered ? 0 : internal.tickOffset;
+                    tickY = internal.tickCentered ? internal.tickOffset : 0;
+                } else {
+                    internal.tickOffset = tickX = 0;
+                }
+
+                internal.updateRange();
+                internal.updateTickLength();
+                internal.updateTickTextCharSize(g.select('.tick'));
+
+                var lineUpdate = tickUpdate.select("line").merge(tickEnter.append("line")),
+                    textUpdate = tickUpdate.select("text").merge(tickEnter.append("text"));
+
+                var tspans = tickUpdate.selectAll('text').selectAll('tspan').data(function (d, i) {
+                    return internal.tspanData(d, i, scale1);
+                }),
+                    tspanEnter = tspans.enter().append('tspan'),
+                    tspanUpdate = tspanEnter.merge(tspans).text(function (d) {
+                    return d.splitted;
+                });
+                tspans.exit().remove();
+
+                var path = g.selectAll(".domain").data([0]),
+                    pathUpdate = path.enter().append("path").merge(path).attr("class", "domain");
+
+                // TODO: each attr should be one function and change its behavior by internal.orient, probably
+                switch (internal.orient) {
+                    case "bottom":
+                        {
+                            tickTransform = internal.axisX;
+                            lineUpdate.attr("x1", tickX).attr("x2", tickX).attr("y2", function (d, i) {
+                                return internal.lineY2(d, i);
+                            });
+                            textUpdate.attr("x", 0).attr("y", function (d, i) {
+                                return internal.textY(d, i);
+                            }).attr("transform", function (d, i) {
+                                return internal.textTransform(d, i);
+                            }).style("text-anchor", function (d, i) {
+                                return internal.textTextAnchor(d, i);
+                            });
+                            tspanUpdate.attr('x', 0).attr("dy", function (d, i) {
+                                return internal.tspanDy(d, i);
+                            }).attr('dx', function (d, i) {
+                                return internal.tspanDx(d, i);
+                            });
+                            pathUpdate.attr("d", "M" + internal.range[0] + "," + internal.outerTickSize + "V0H" + internal.range[1] + "V" + internal.outerTickSize);
+                            break;
+                        }
+                    case "top":
+                        {
+                            // TODO: rotated tick text
+                            tickTransform = internal.axisX;
+                            lineUpdate.attr("x1", tickX).attr("x2", tickX).attr("y2", function (d, i) {
+                                return -1 * internal.lineY2(d, i);
+                            });
+                            textUpdate.attr("x", 0).attr("y", function (d, i) {
+                                return -1 * internal.textY(d, i) - (params.isCategory ? 2 : internal.tickLength - 2);
+                            }).attr("transform", function (d, i) {
+                                return internal.textTransform(d, i);
+                            }).style("text-anchor", function (d, i) {
+                                return internal.textTextAnchor(d, i);
+                            });
+                            tspanUpdate.attr('x', 0).attr("dy", function (d, i) {
+                                return internal.tspanDy(d, i);
+                            }).attr('dx', function (d, i) {
+                                return internal.tspanDx(d, i);
+                            });
+                            pathUpdate.attr("d", "M" + internal.range[0] + "," + -internal.outerTickSize + "V0H" + internal.range[1] + "V" + -internal.outerTickSize);
+                            break;
+                        }
+                    case "left":
+                        {
+                            tickTransform = internal.axisY;
+                            lineUpdate.attr("x2", -internal.innerTickSize).attr("y1", tickY).attr("y2", tickY);
+                            textUpdate.attr("x", -internal.tickLength).attr("y", internal.tickOffset).style("text-anchor", "end");
+                            tspanUpdate.attr('x', -internal.tickLength).attr("dy", function (d, i) {
+                                return internal.tspanDy(d, i);
+                            });
+                            pathUpdate.attr("d", "M" + -internal.outerTickSize + "," + internal.range[0] + "H0V" + internal.range[1] + "H" + -internal.outerTickSize);
+                            break;
+                        }
+                    case "right":
+                        {
+                            tickTransform = internal.axisY;
+                            lineUpdate.attr("x2", internal.innerTickSize).attr("y1", tickY).attr("y2", tickY);
+                            textUpdate.attr("x", internal.tickLength).attr("y", internal.tickOffset).style("text-anchor", "start");
+                            tspanUpdate.attr('x', internal.tickLength).attr("dy", function (d, i) {
+                                return internal.tspanDy(d, i);
+                            });
+                            pathUpdate.attr("d", "M" + internal.outerTickSize + "," + internal.range[0] + "H0V" + internal.range[1] + "H" + internal.outerTickSize);
+                            break;
+                        }
+                }
+                if (scale1.rangeBand) {
+                    var x = scale1,
+                        dx = x.rangeBand() / 2;
+                    scale0 = scale1 = function scale1(d) {
+                        return x(d) + dx;
+                    };
+                } else if (scale0.rangeBand) {
+                    scale0 = scale1;
+                } else {
+                    tickExit.call(tickTransform, scale1, internal.tickOffset);
+                }
+                tickEnter.call(tickTransform, scale0, internal.tickOffset);
+                self = (transition ? tickUpdate.transition(transition) : tickUpdate).style('opacity', 1).call(tickTransform, scale1, internal.tickOffset);
+            });
+            return self;
+        }
+        axis.scale = function (x) {
+            if (!arguments.length) {
+                return internal.scale;
+            }
+            internal.scale = x;
+            return axis;
+        };
+        axis.orient = function (x) {
+            if (!arguments.length) {
+                return internal.orient;
+            }
+            internal.orient = x in { top: 1, right: 1, bottom: 1, left: 1 } ? x + "" : "bottom";
+            return axis;
+        };
+        axis.tickFormat = function (format) {
+            if (!arguments.length) {
+                return internal.tickFormat;
+            }
+            internal.tickFormat = format;
+            return axis;
+        };
+        axis.tickCentered = function (isCentered) {
+            if (!arguments.length) {
+                return internal.tickCentered;
+            }
+            internal.tickCentered = isCentered;
+            return axis;
+        };
+        axis.tickOffset = function () {
+            return internal.tickOffset;
+        };
+        axis.tickInterval = function () {
+            var interval, length;
+            if (params.isCategory) {
+                interval = internal.tickOffset * 2;
+            } else {
+                length = axis.g.select('path.domain').node().getTotalLength() - internal.outerTickSize * 2;
+                interval = length / axis.g.selectAll('line').size();
+            }
+            return interval === Infinity ? 0 : interval;
+        };
+        axis.ticks = function () {
+            if (!arguments.length) {
+                return internal.tickArguments;
+            }
+            internal.tickArguments = arguments;
+            return axis;
+        };
+        axis.tickCulling = function (culling) {
+            if (!arguments.length) {
+                return internal.tickCulling;
+            }
+            internal.tickCulling = culling;
+            return axis;
+        };
+        axis.tickValues = function (x) {
+            if (typeof x === 'function') {
+                internal.tickValues = function () {
+                    return x(internal.scale.domain());
+                };
+            } else {
+                if (!arguments.length) {
+                    return internal.tickValues;
+                }
+                internal.tickValues = x;
+            }
+            return axis;
+        };
+        return axis;
+    };
+
+    var CLASS = {
+        target: 'c3-target',
+        chart: 'c3-chart',
+        chartLine: 'c3-chart-line',
+        chartLines: 'c3-chart-lines',
+        chartBar: 'c3-chart-bar',
+        chartBars: 'c3-chart-bars',
+        chartText: 'c3-chart-text',
+        chartTexts: 'c3-chart-texts',
+        chartArc: 'c3-chart-arc',
+        chartArcs: 'c3-chart-arcs',
+        chartArcsTitle: 'c3-chart-arcs-title',
+        chartArcsBackground: 'c3-chart-arcs-background',
+        chartArcsGaugeUnit: 'c3-chart-arcs-gauge-unit',
+        chartArcsGaugeMax: 'c3-chart-arcs-gauge-max',
+        chartArcsGaugeMin: 'c3-chart-arcs-gauge-min',
+        selectedCircle: 'c3-selected-circle',
+        selectedCircles: 'c3-selected-circles',
+        eventRect: 'c3-event-rect',
+        eventRects: 'c3-event-rects',
+        eventRectsSingle: 'c3-event-rects-single',
+        eventRectsMultiple: 'c3-event-rects-multiple',
+        zoomRect: 'c3-zoom-rect',
+        brush: 'c3-brush',
+        dragZoom: 'c3-drag-zoom',
+        focused: 'c3-focused',
+        defocused: 'c3-defocused',
+        region: 'c3-region',
+        regions: 'c3-regions',
+        title: 'c3-title',
+        tooltipContainer: 'c3-tooltip-container',
+        tooltip: 'c3-tooltip',
+        tooltipName: 'c3-tooltip-name',
+        shape: 'c3-shape',
+        shapes: 'c3-shapes',
+        line: 'c3-line',
+        lines: 'c3-lines',
+        bar: 'c3-bar',
+        bars: 'c3-bars',
+        circle: 'c3-circle',
+        circles: 'c3-circles',
+        arc: 'c3-arc',
+        arcLabelLine: 'c3-arc-label-line',
+        arcs: 'c3-arcs',
+        area: 'c3-area',
+        areas: 'c3-areas',
+        empty: 'c3-empty',
+        text: 'c3-text',
+        texts: 'c3-texts',
+        gaugeValue: 'c3-gauge-value',
+        grid: 'c3-grid',
+        gridLines: 'c3-grid-lines',
+        xgrid: 'c3-xgrid',
+        xgrids: 'c3-xgrids',
+        xgridLine: 'c3-xgrid-line',
+        xgridLines: 'c3-xgrid-lines',
+        xgridFocus: 'c3-xgrid-focus',
+        ygrid: 'c3-ygrid',
+        ygrids: 'c3-ygrids',
+        ygridLine: 'c3-ygrid-line',
+        ygridLines: 'c3-ygrid-lines',
+        axis: 'c3-axis',
+        axisX: 'c3-axis-x',
+        axisXLabel: 'c3-axis-x-label',
+        axisY: 'c3-axis-y',
+        axisYLabel: 'c3-axis-y-label',
+        axisY2: 'c3-axis-y2',
+        axisY2Label: 'c3-axis-y2-label',
+        legendBackground: 'c3-legend-background',
+        legendItem: 'c3-legend-item',
+        legendItemEvent: 'c3-legend-item-event',
+        legendItemTile: 'c3-legend-item-tile',
+        legendItemHidden: 'c3-legend-item-hidden',
+        legendItemFocused: 'c3-legend-item-focused',
+        dragarea: 'c3-dragarea',
+        EXPANDED: '_expanded_',
+        SELECTED: '_selected_',
+        INCLUDED: '_included_'
+    };
+
+    var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
+      return typeof obj;
+    } : function (obj) {
+      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+    };
+
+    var classCallCheck = function (instance, Constructor) {
+      if (!(instance instanceof Constructor)) {
+        throw new TypeError("Cannot call a class as a function");
+      }
+    };
+
+    var defineProperty = function (obj, key, value) {
+      if (key in obj) {
+        Object.defineProperty(obj, key, {
+          value: value,
+          enumerable: true,
+          configurable: true,
+          writable: true
+        });
+      } else {
+        obj[key] = value;
+      }
+
+      return obj;
+    };
+
+    var asHalfPixel = function asHalfPixel(n) {
+        return Math.ceil(n) + 0.5;
+    };
+    var ceil10 = function ceil10(v) {
+        return Math.ceil(v / 10) * 10;
+    };
+    var diffDomain = function diffDomain(d) {
+        return d[1] - d[0];
+    };
+    var getOption = function getOption(options, key, defaultValue) {
+        return isDefined(options[key]) ? options[key] : defaultValue;
+    };
+    var getPathBox = function getPathBox(path) {
+        var box = path.getBoundingClientRect(),
+            items = [path.pathSegList.getItem(0), path.pathSegList.getItem(1)],
+            minX = items[0].x,
+            minY = Math.min(items[0].y, items[1].y);
+        return { x: minX, y: minY, width: box.width, height: box.height };
+    };
+    var hasValue = function hasValue(dict, value) {
+        var found = false;
+        Object.keys(dict).forEach(function (key) {
+            if (dict[key] === value) {
+                found = true;
+            }
+        });
+        return found;
+    };
+    var isArray = function isArray(o) {
+        return Array.isArray(o);
+    };
+    var isDefined = function isDefined(v) {
+        return typeof v !== 'undefined';
+    };
+    var isEmpty = function isEmpty(o) {
+        return typeof o === 'undefined' || o === null || isString(o) && o.length === 0 || (typeof o === 'undefined' ? 'undefined' : _typeof(o)) === 'object' && Object.keys(o).length === 0;
+    };
+    var isFunction = function isFunction(o) {
+        return typeof o === 'function';
+    };
+    var isString = function isString(o) {
+        return typeof o === 'string';
+    };
+    var isUndefined = function isUndefined(v) {
+        return typeof v === 'undefined';
+    };
+    var isValue = function isValue(v) {
+        return v || v === 0;
+    };
+    var notEmpty = function notEmpty(o) {
+        return !isEmpty(o);
+    };
+    var sanitise = function sanitise(str) {
+        return typeof str === 'string' ? str.replace(/</g, '&lt;').replace(/>/g, '&gt;') : str;
+    };
+
+    var Axis = function Axis(owner) {
+        classCallCheck(this, Axis);
+
+        this.owner = owner;
+        this.d3 = owner.d3;
+        this.internal = AxisInternal;
+    };
+
+    Axis.prototype.init = function init() {
+        var $$ = this.owner,
+            config = $$.config,
+            main = $$.main;
+        $$.axes.x = main.append("g").attr("class", CLASS.axis + ' ' + CLASS.axisX).attr("clip-path", config.axis_x_inner ? "" : $$.clipPathForXAxis).attr("transform", $$.getTranslate('x')).style("visibility", config.axis_x_show ? 'visible' : 'hidden');
+        $$.axes.x.append("text").attr("class", CLASS.axisXLabel).attr("transform", config.axis_rotated ? "rotate(-90)" : "").style("text-anchor", this.textAnchorForXAxisLabel.bind(this));
+        $$.axes.y = main.append("g").attr("class", CLASS.axis + ' ' + CLASS.axisY).attr("clip-path", config.axis_y_inner ? "" : $$.clipPathForYAxis).attr("transform", $$.getTranslate('y')).style("visibility", config.axis_y_show ? 'visible' : 'hidden');
+        $$.axes.y.append("text").attr("class", CLASS.axisYLabel).attr("transform", config.axis_rotated ? "" : "rotate(-90)").style("text-anchor", this.textAnchorForYAxisLabel.bind(this));
+
+        $$.axes.y2 = main.append("g").attr("class", CLASS.axis + ' ' + CLASS.axisY2)
+        // clip-path?
+        .attr("transform", $$.getTranslate('y2')).style("visibility", config.axis_y2_show ? 'visible' : 'hidden');
+        $$.axes.y2.append("text").attr("class", CLASS.axisY2Label).attr("transform", config.axis_rotated ? "" : "rotate(-90)").style("text-anchor", this.textAnchorForY2AxisLabel.bind(this));
+    };
+    Axis.prototype.getXAxis = function getXAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
+        var $$ = this.owner,
+            config = $$.config,
+            axisParams = {
+            isCategory: $$.isCategorized(),
+            withOuterTick: withOuterTick,
+            tickMultiline: config.axis_x_tick_multiline,
+            tickMultilineMax: config.axis_x_tick_multiline ? Number(config.axis_x_tick_multilineMax) : 0,
+            tickWidth: config.axis_x_tick_width,
+            tickTextRotate: withoutRotateTickText ? 0 : config.axis_x_tick_rotate,
+            withoutTransition: withoutTransition
+        },
+            axis = new this.internal(this, axisParams).axis.scale(scale).orient(orient);
+
+        if ($$.isTimeSeries() && tickValues && typeof tickValues !== "function") {
+            tickValues = tickValues.map(function (v) {
+                return $$.parseDate(v);
+            });
+        }
+
+        // Set tick
+        axis.tickFormat(tickFormat).tickValues(tickValues);
+        if ($$.isCategorized()) {
+            axis.tickCentered(config.axis_x_tick_centered);
+            if (isEmpty(config.axis_x_tick_culling)) {
+                config.axis_x_tick_culling = false;
+            }
+        }
+
+        return axis;
+    };
+    Axis.prototype.updateXAxisTickValues = function updateXAxisTickValues(targets, axis) {
+        var $$ = this.owner,
+            config = $$.config,
+            tickValues;
+        if (config.axis_x_tick_fit || config.axis_x_tick_count) {
+            tickValues = this.generateTickValues($$.mapTargetsToUniqueXs(targets), config.axis_x_tick_count, $$.isTimeSeries());
+        }
+        if (axis) {
+            axis.tickValues(tickValues);
+        } else {
+            $$.xAxis.tickValues(tickValues);
+            $$.subXAxis.tickValues(tickValues);
+        }
+        return tickValues;
+    };
+    Axis.prototype.getYAxis = function getYAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
+        var $$ = this.owner,
+            config = $$.config,
+            axisParams = {
+            withOuterTick: withOuterTick,
+            withoutTransition: withoutTransition,
+            tickTextRotate: withoutRotateTickText ? 0 : config.axis_y_tick_rotate
+        },
+            axis = new this.internal(this, axisParams).axis.scale(scale).orient(orient).tickFormat(tickFormat);
+        if ($$.isTimeSeriesY()) {
+            axis.ticks(config.axis_y_tick_time_type, config.axis_y_tick_time_interval);
+        } else {
+            axis.tickValues(tickValues);
+        }
+        return axis;
+    };
+    Axis.prototype.getId = function getId(id) {
+        var config = this.owner.config;
+        return id in config.data_axes ? config.data_axes[id] : 'y';
+    };
+    Axis.prototype.getXAxisTickFormat = function getXAxisTickFormat() {
+        // #2251 previously set any negative values to a whole number,
+        // however both should be truncated according to the users format specification
+        var $$ = this.owner,
+            config = $$.config;
+        var format = $$.isTimeSeries() ? $$.defaultAxisTimeFormat : $$.isCategorized() ? $$.categoryName : function (v) {
+            return v;
+        };
+
+        if (config.axis_x_tick_format) {
+            if (isFunction(config.axis_x_tick_format)) {
+                format = config.axis_x_tick_format;
+            } else if ($$.isTimeSeries()) {
+                format = function format(date) {
+                    return date ? $$.axisTimeFormat(config.axis_x_tick_format)(date) : "";
+                };
+            }
+        }
+        return isFunction(format) ? function (v) {
+            return format.call($$, v);
+        } : format;
+    };
+    Axis.prototype.getTickValues = function getTickValues(tickValues, axis) {
+        return tickValues ? tickValues : axis ? axis.tickValues() : undefined;
+    };
+    Axis.prototype.getXAxisTickValues = function getXAxisTickValues() {
+        return this.getTickValues(this.owner.config.axis_x_tick_values, this.owner.xAxis);
+    };
+    Axis.prototype.getYAxisTickValues = function getYAxisTickValues() {
+        return this.getTickValues(this.owner.config.axis_y_tick_values, this.owner.yAxis);
+    };
+    Axis.prototype.getY2AxisTickValues = function getY2AxisTickValues() {
+        return this.getTickValues(this.owner.config.axis_y2_tick_values, this.owner.y2Axis);
+    };
+    Axis.prototype.getLabelOptionByAxisId = function getLabelOptionByAxisId(axisId) {
+        var $$ = this.owner,
+            config = $$.config,
+            option;
+        if (axisId === 'y') {
+            option = config.axis_y_label;
+        } else if (axisId === 'y2') {
+            option = config.axis_y2_label;
+        } else if (axisId === 'x') {
+            option = config.axis_x_label;
+        }
+        return option;
+    };
+    Axis.prototype.getLabelText = function getLabelText(axisId) {
+        var option = this.getLabelOptionByAxisId(axisId);
+        return isString(option) ? option : option ? option.text : null;
+    };
+    Axis.prototype.setLabelText = function setLabelText(axisId, text) {
+        var $$ = this.owner,
+            config = $$.config,
+            option = this.getLabelOptionByAxisId(axisId);
+        if (isString(option)) {
+            if (axisId === 'y') {
+                config.axis_y_label = text;
+            } else if (axisId === 'y2') {
+                config.axis_y2_label = text;
+            } else if (axisId === 'x') {
+                config.axis_x_label = text;
+            }
+        } else if (option) {
+            option.text = text;
+        }
+    };
+    Axis.prototype.getLabelPosition = function getLabelPosition(axisId, defaultPosition) {
+        var option = this.getLabelOptionByAxisId(axisId),
+            position = option && (typeof option === 'undefined' ? 'undefined' : _typeof(option)) === 'object' && option.position ? option.position : defaultPosition;
+        return {
+            isInner: position.indexOf('inner') >= 0,
+            isOuter: position.indexOf('outer') >= 0,
+            isLeft: position.indexOf('left') >= 0,
+            isCenter: position.indexOf('center') >= 0,
+            isRight: position.indexOf('right') >= 0,
+            isTop: position.indexOf('top') >= 0,
+            isMiddle: position.indexOf('middle') >= 0,
+            isBottom: position.indexOf('bottom') >= 0
+        };
+    };
+    Axis.prototype.getXAxisLabelPosition = function getXAxisLabelPosition() {
+        return this.getLabelPosition('x', this.owner.config.axis_rotated ? 'inner-top' : 'inner-right');
+    };
+    Axis.prototype.getYAxisLabelPosition = function getYAxisLabelPosition() {
+        return this.getLabelPosition('y', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
+    };
+    Axis.prototype.getY2AxisLabelPosition = function getY2AxisLabelPosition() {
+        return this.getLabelPosition('y2', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
+    };
+    Axis.prototype.getLabelPositionById = function getLabelPositionById(id) {
+        return id === 'y2' ? this.getY2AxisLabelPosition() : id === 'y' ? this.getYAxisLabelPosition() : this.getXAxisLabelPosition();
+    };
+    Axis.prototype.textForXAxisLabel = function textForXAxisLabel() {
+        return this.getLabelText('x');
+    };
+    Axis.prototype.textForYAxisLabel = function textForYAxisLabel() {
+        return this.getLabelText('y');
+    };
+    Axis.prototype.textForY2AxisLabel = function textForY2AxisLabel() {
+        return this.getLabelText('y2');
+    };
+    Axis.prototype.xForAxisLabel = function xForAxisLabel(forHorizontal, position) {
+        var $$ = this.owner;
+        if (forHorizontal) {
+            return position.isLeft ? 0 : position.isCenter ? $$.width / 2 : $$.width;
+        } else {
+            return position.isBottom ? -$$.height : position.isMiddle ? -$$.height / 2 : 0;
+        }
+    };
+    Axis.prototype.dxForAxisLabel = function dxForAxisLabel(forHorizontal, position) {
+        if (forHorizontal) {
+            return position.isLeft ? "0.5em" : position.isRight ? "-0.5em" : "0";
+        } else {
+            return position.isTop ? "-0.5em" : position.isBottom ? "0.5em" : "0";
+        }
+    };
+    Axis.prototype.textAnchorForAxisLabel = function textAnchorForAxisLabel(forHorizontal, position) {
+        if (forHorizontal) {
+            return position.isLeft ? 'start' : position.isCenter ? 'middle' : 'end';
+        } else {
+            return position.isBottom ? 'start' : position.isMiddle ? 'middle' : 'end';
+        }
+    };
+    Axis.prototype.xForXAxisLabel = function xForXAxisLabel() {
+        return this.xForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
+    };
+    Axis.prototype.xForYAxisLabel = function xForYAxisLabel() {
+        return this.xForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
+    };
+    Axis.prototype.xForY2AxisLabel = function xForY2AxisLabel() {
+        return this.xForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
+    };
+    Axis.prototype.dxForXAxisLabel = function dxForXAxisLabel() {
+        return this.dxForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
+    };
+    Axis.prototype.dxForYAxisLabel = function dxForYAxisLabel() {
+        return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
+    };
+    Axis.prototype.dxForY2AxisLabel = function dxForY2AxisLabel() {
+        return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
+    };
+    Axis.prototype.dyForXAxisLabel = function dyForXAxisLabel() {
+        var $$ = this.owner,
+            config = $$.config,
+            position = this.getXAxisLabelPosition();
+        if (config.axis_rotated) {
+            return position.isInner ? "1.2em" : -25 - ($$.config.axis_x_inner ? 0 : this.getMaxTickWidth('x'));
+        } else {
+            return position.isInner ? "-0.5em" : config.axis_x_height ? config.axis_x_height - 10 : "3em";
+        }
+    };
+    Axis.prototype.dyForYAxisLabel = function dyForYAxisLabel() {
+        var $$ = this.owner,
+            position = this.getYAxisLabelPosition();
+        if ($$.config.axis_rotated) {
+            return position.isInner ? "-0.5em" : "3em";
+        } else {
+            return position.isInner ? "1.2em" : -10 - ($$.config.axis_y_inner ? 0 : this.getMaxTickWidth('y') + 10);
+        }
+    };
+    Axis.prototype.dyForY2AxisLabel = function dyForY2AxisLabel() {
+        var $$ = this.owner,
+            position = this.getY2AxisLabelPosition();
+        if ($$.config.axis_rotated) {
+            return position.isInner ? "1.2em" : "-2.2em";
+        } else {
+            return position.isInner ? "-0.5em" : 15 + ($$.config.axis_y2_inner ? 0 : this.getMaxTickWidth('y2') + 15);
+        }
+    };
+    Axis.prototype.textAnchorForXAxisLabel = function textAnchorForXAxisLabel() {
+        var $$ = this.owner;
+        return this.textAnchorForAxisLabel(!$$.config.axis_rotated, this.getXAxisLabelPosition());
+    };
+    Axis.prototype.textAnchorForYAxisLabel = function textAnchorForYAxisLabel() {
+        var $$ = this.owner;
+        return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getYAxisLabelPosition());
+    };
+    Axis.prototype.textAnchorForY2AxisLabel = function textAnchorForY2AxisLabel() {
+        var $$ = this.owner;
+        return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getY2AxisLabelPosition());
+    };
+    Axis.prototype.getMaxTickWidth = function getMaxTickWidth(id, withoutRecompute) {
+        var $$ = this.owner,
+            config = $$.config,
+            maxWidth = 0,
+            targetsToShow,
+            scale,
+            axis,
+            dummy,
+            svg;
+        if (withoutRecompute && $$.currentMaxTickWidths[id]) {
+            return $$.currentMaxTickWidths[id];
+        }
+        if ($$.svg) {
+            targetsToShow = $$.filterTargetsToShow($$.data.targets);
+            if (id === 'y') {
+                scale = $$.y.copy().domain($$.getYDomain(targetsToShow, 'y'));
+                axis = this.getYAxis(scale, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, false, true, true);
+            } else if (id === 'y2') {
+                scale = $$.y2.copy().domain($$.getYDomain(targetsToShow, 'y2'));
+                axis = this.getYAxis(scale, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, false, true, true);
+            } else {
+                scale = $$.x.copy().domain($$.getXDomain(targetsToShow));
+                axis = this.getXAxis(scale, $$.xOrient, $$.xAxisTickFormat, $$.xAxisTickValues, false, true, true);
+                this.updateXAxisTickValues(targetsToShow, axis);
+            }
+            dummy = $$.d3.select('body').append('div').classed('c3', true);
+            svg = dummy.append("svg").style('visibility', 'hidden').style('position', 'fixed').style('top', 0).style('left', 0), svg.append('g').call(axis).each(function () {
+                $$.d3.select(this).selectAll('text').each(function () {
+                    var box = this.getBoundingClientRect();
+                    if (maxWidth < box.width) {
+                        maxWidth = box.width;
+                    }
+                });
+                dummy.remove();
+            });
+        }
+        $$.currentMaxTickWidths[id] = maxWidth <= 0 ? $$.currentMaxTickWidths[id] : maxWidth;
+        return $$.currentMaxTickWidths[id];
+    };
+
+    Axis.prototype.updateLabels = function updateLabels(withTransition) {
+        var $$ = this.owner;
+        var axisXLabel = $$.main.select('.' + CLASS.axisX + ' .' + CLASS.axisXLabel),
+            axisYLabel = $$.main.select('.' + CLASS.axisY + ' .' + CLASS.axisYLabel),
+            axisY2Label = $$.main.select('.' + CLASS.axisY2 + ' .' + CLASS.axisY2Label);
+        (withTransition ? axisXLabel.transition() : axisXLabel).attr("x", this.xForXAxisLabel.bind(this)).attr("dx", this.dxForXAxisLabel.bind(this)).attr("dy", this.dyForXAxisLabel.bind(this)).text(this.textForXAxisLabel.bind(this));
+        (withTransition ? axisYLabel.transition() : axisYLabel).attr("x", this.xForYAxisLabel.bind(this)).attr("dx", this.dxForYAxisLabel.bind(this)).attr("dy", this.dyForYAxisLabel.bind(this)).text(this.textForYAxisLabel.bind(this));
+        (withTransition ? axisY2Label.transition() : axisY2Label).attr("x", this.xForY2AxisLabel.bind(this)).attr("dx", this.dxForY2AxisLabel.bind(this)).attr("dy", this.dyForY2AxisLabel.bind(this)).text(this.textForY2AxisLabel.bind(this));
+    };
+    Axis.prototype.getPadding = function getPadding(padding, key, defaultValue, domainLength) {
+        var p = typeof padding === 'number' ? padding : padding[key];
+        if (!isValue(p)) {
+            return defaultValue;
+        }
+        if (padding.unit === 'ratio') {
+            return padding[key] * domainLength;
+        }
+        // assume padding is pixels if unit is not specified
+        return this.convertPixelsToAxisPadding(p, domainLength);
+    };
+    Axis.prototype.convertPixelsToAxisPadding = function convertPixelsToAxisPadding(pixels, domainLength) {
+        var $$ = this.owner,
+            length = $$.config.axis_rotated ? $$.width : $$.height;
+        return domainLength * (pixels / length);
+    };
+    Axis.prototype.generateTickValues = function generateTickValues(values, tickCount, forTimeSeries) {
+        var tickValues = values,
+            targetCount,
+            start,
+            end,
+            count,
+            interval,
+            i,
+            tickValue;
+        if (tickCount) {
+            targetCount = isFunction(tickCount) ? tickCount() : tickCount;
+            // compute ticks according to tickCount
+            if (targetCount === 1) {
+                tickValues = [values[0]];
+            } else if (targetCount === 2) {
+                tickValues = [values[0], values[values.length - 1]];
+            } else if (targetCount > 2) {
+                count = targetCount - 2;
+                start = values[0];
+                end = values[values.length - 1];
+                interval = (end - start) / (count + 1);
+                // re-construct unique values
+                tickValues = [start];
+                for (i = 0; i < count; i++) {
+                    tickValue = +start + interval * (i + 1);
+                    tickValues.push(forTimeSeries ? new Date(tickValue) : tickValue);
+                }
+                tickValues.push(end);
+            }
+        }
+        if (!forTimeSeries) {
+            tickValues = tickValues.sort(function (a, b) {
+                return a - b;
+            });
+        }
+        return tickValues;
+    };
+    Axis.prototype.generateTransitions = function generateTransitions(duration) {
+        var $$ = this.owner,
+            axes = $$.axes;
+        return {
+            axisX: duration ? axes.x.transition().duration(duration) : axes.x,
+            axisY: duration ? axes.y.transition().duration(duration) : axes.y,
+            axisY2: duration ? axes.y2.transition().duration(duration) : axes.y2,
+            axisSubX: duration ? axes.subx.transition().duration(duration) : axes.subx
+        };
+    };
+    Axis.prototype.redraw = function redraw(duration, isHidden) {
+        var $$ = this.owner,
+            transition = duration ? $$.d3.transition().duration(duration) : null;
+        $$.axes.x.style("opacity", isHidden ? 0 : 1).call($$.xAxis, transition);
+        $$.axes.y.style("opacity", isHidden ? 0 : 1).call($$.yAxis, transition);
+        $$.axes.y2.style("opacity", isHidden ? 0 : 1).call($$.y2Axis, transition);
+        $$.axes.subx.style("opacity", isHidden ? 0 : 1).call($$.subXAxis, transition);
+    };
+
+    var c3 = {
+        version: "0.6.7",
+        chart: {
+            fn: Chart.prototype,
+            internal: {
+                fn: ChartInternal.prototype,
+                axis: {
+                    fn: Axis.prototype,
+                    internal: {
+                        fn: AxisInternal.prototype
+                    }
+                }
+            }
+        },
+        generate: function generate(config) {
+            return new Chart(config);
+        }
+    };
+
+    ChartInternal.prototype.beforeInit = function () {
+        // can do something
+    };
+    ChartInternal.prototype.afterInit = function () {
+        // can do something
+    };
+    ChartInternal.prototype.init = function () {
+        var $$ = this,
+            config = $$.config;
+
+        $$.initParams();
+
+        if (config.data_url) {
+            $$.convertUrlToData(config.data_url, config.data_mimeType, config.data_headers, config.data_keys, $$.initWithData);
+        } else if (config.data_json) {
+            $$.initWithData($$.convertJsonToData(config.data_json, config.data_keys));
+        } else if (config.data_rows) {
+            $$.initWithData($$.convertRowsToData(config.data_rows));
+        } else if (config.data_columns) {
+            $$.initWithData($$.convertColumnsToData(config.data_columns));
+        } else {
+            throw Error('url or json or rows or columns is required.');
+        }
+    };
+
+    ChartInternal.prototype.initParams = function () {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config;
+
+        // MEMO: clipId needs to be unique because it conflicts when multiple charts exist
+        $$.clipId = "c3-" + +new Date() + '-clip';
+        $$.clipIdForXAxis = $$.clipId + '-xaxis';
+        $$.clipIdForYAxis = $$.clipId + '-yaxis';
+        $$.clipIdForGrid = $$.clipId + '-grid';
+        $$.clipIdForSubchart = $$.clipId + '-subchart';
+        $$.clipPath = $$.getClipPath($$.clipId);
+        $$.clipPathForXAxis = $$.getClipPath($$.clipIdForXAxis);
+        $$.clipPathForYAxis = $$.getClipPath($$.clipIdForYAxis);
+        $$.clipPathForGrid = $$.getClipPath($$.clipIdForGrid);
+        $$.clipPathForSubchart = $$.getClipPath($$.clipIdForSubchart);
+
+        $$.dragStart = null;
+        $$.dragging = false;
+        $$.flowing = false;
+        $$.cancelClick = false;
+        $$.mouseover = false;
+        $$.transiting = false;
+
+        $$.color = $$.generateColor();
+        $$.levelColor = $$.generateLevelColor();
+
+        $$.dataTimeParse = (config.data_xLocaltime ? d3.timeParse : d3.utcParse)($$.config.data_xFormat);
+        $$.axisTimeFormat = config.axis_x_localtime ? d3.timeFormat : d3.utcFormat;
+        $$.defaultAxisTimeFormat = function (date) {
+            if (date.getMilliseconds()) {
+                return d3.timeFormat(".%L")(date);
+            }
+            if (date.getSeconds()) {
+                return d3.timeFormat(":%S")(date);
+            }
+            if (date.getMinutes()) {
+                return d3.timeFormat("%I:%M")(date);
+            }
+            if (date.getHours()) {
+                return d3.timeFormat("%I %p")(date);
+            }
+            if (date.getDay() && date.getDate() !== 1) {
+                return d3.timeFormat("%-m/%-d")(date);
+            }
+            if (date.getDate() !== 1) {
+                return d3.timeFormat("%-m/%-d")(date);
+            }
+            if (date.getMonth()) {
+                return d3.timeFormat("%-m/%-d")(date);
+            }
+            return d3.timeFormat("%Y/%-m/%-d")(date);
+        };
+        $$.hiddenTargetIds = [];
+        $$.hiddenLegendIds = [];
+        $$.focusedTargetIds = [];
+        $$.defocusedTargetIds = [];
+
+        $$.xOrient = config.axis_rotated ? config.axis_x_inner ? "right" : "left" : config.axis_x_inner ? "top" : "bottom";
+        $$.yOrient = config.axis_rotated ? config.axis_y_inner ? "top" : "bottom" : config.axis_y_inner ? "right" : "left";
+        $$.y2Orient = config.axis_rotated ? config.axis_y2_inner ? "bottom" : "top" : config.axis_y2_inner ? "left" : "right";
+        $$.subXOrient = config.axis_rotated ? "left" : "bottom";
+
+        $$.isLegendRight = config.legend_position === 'right';
+        $$.isLegendInset = config.legend_position === 'inset';
+        $$.isLegendTop = config.legend_inset_anchor === 'top-left' || config.legend_inset_anchor === 'top-right';
+        $$.isLegendLeft = config.legend_inset_anchor === 'top-left' || config.legend_inset_anchor === 'bottom-left';
+        $$.legendStep = 0;
+        $$.legendItemWidth = 0;
+        $$.legendItemHeight = 0;
+
+        $$.currentMaxTickWidths = {
+            x: 0,
+            y: 0,
+            y2: 0
+        };
+
+        $$.rotated_padding_left = 30;
+        $$.rotated_padding_right = config.axis_rotated && !config.axis_x_show ? 0 : 30;
+        $$.rotated_padding_top = 5;
+
+        $$.withoutFadeIn = {};
+
+        $$.intervalForObserveInserted = undefined;
+
+        $$.axes.subx = d3.selectAll([]); // needs when excluding subchart.js
+    };
+
+    ChartInternal.prototype.initChartElements = function () {
+        if (this.initBar) {
+            this.initBar();
+        }
+        if (this.initLine) {
+            this.initLine();
+        }
+        if (this.initArc) {
+            this.initArc();
+        }
+        if (this.initGauge) {
+            this.initGauge();
+        }
+        if (this.initText) {
+            this.initText();
+        }
+    };
+
+    ChartInternal.prototype.initWithData = function (data) {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config;
+        var defs,
+            main,
+            binding = true;
+
+        $$.axis = new Axis($$);
+
+        if (!config.bindto) {
+            $$.selectChart = d3.selectAll([]);
+        } else if (typeof config.bindto.node === 'function') {
+            $$.selectChart = config.bindto;
+        } else {
+            $$.selectChart = d3.select(config.bindto);
+        }
+        if ($$.selectChart.empty()) {
+            $$.selectChart = d3.select(document.createElement('div')).style('opacity', 0);
+            $$.observeInserted($$.selectChart);
+            binding = false;
+        }
+        $$.selectChart.html("").classed("c3", true);
+
+        // Init data as targets
+        $$.data.xs = {};
+        $$.data.targets = $$.convertDataToTargets(data);
+
+        if (config.data_filter) {
+            $$.data.targets = $$.data.targets.filter(config.data_filter);
+        }
+
+        // Set targets to hide if needed
+        if (config.data_hide) {
+            $$.addHiddenTargetIds(config.data_hide === true ? $$.mapToIds($$.data.targets) : config.data_hide);
+        }
+        if (config.legend_hide) {
+            $$.addHiddenLegendIds(config.legend_hide === true ? $$.mapToIds($$.data.targets) : config.legend_hide);
+        }
+
+        // Init sizes and scales
+        $$.updateSizes();
+        $$.updateScales();
+
+        // Set domains for each scale
+        $$.x.domain(d3.extent($$.getXDomain($$.data.targets)));
+        $$.y.domain($$.getYDomain($$.data.targets, 'y'));
+        $$.y2.domain($$.getYDomain($$.data.targets, 'y2'));
+        $$.subX.domain($$.x.domain());
+        $$.subY.domain($$.y.domain());
+        $$.subY2.domain($$.y2.domain());
+
+        // Save original x domain for zoom update
+        $$.orgXDomain = $$.x.domain();
+
+        /*-- Basic Elements --*/
+
+        // Define svgs
+        $$.svg = $$.selectChart.append("svg").style("overflow", "hidden").on('mouseenter', function () {
+            return config.onmouseover.call($$);
+        }).on('mouseleave', function () {
+            return config.onmouseout.call($$);
+        });
+
+        if ($$.config.svg_classname) {
+            $$.svg.attr('class', $$.config.svg_classname);
+        }
+
+        // Define defs
+        defs = $$.svg.append("defs");
+        $$.clipChart = $$.appendClip(defs, $$.clipId);
+        $$.clipXAxis = $$.appendClip(defs, $$.clipIdForXAxis);
+        $$.clipYAxis = $$.appendClip(defs, $$.clipIdForYAxis);
+        $$.clipGrid = $$.appendClip(defs, $$.clipIdForGrid);
+        $$.clipSubchart = $$.appendClip(defs, $$.clipIdForSubchart);
+        $$.updateSvgSize();
+
+        // Define regions
+        main = $$.main = $$.svg.append("g").attr("transform", $$.getTranslate('main'));
+
+        if ($$.initPie) {
+            $$.initPie();
+        }
+        if ($$.initDragZoom) {
+            $$.initDragZoom();
+        }
+        if ($$.initSubchart) {
+            $$.initSubchart();
+        }
+        if ($$.initTooltip) {
+            $$.initTooltip();
+        }
+        if ($$.initLegend) {
+            $$.initLegend();
+        }
+        if ($$.initTitle) {
+            $$.initTitle();
+        }
+        if ($$.initZoom) {
+            $$.initZoom();
+        }
+
+        // Update selection based on size and scale
+        // TODO: currently this must be called after initLegend because of update of sizes, but it should be done in initSubchart.
+        if ($$.initSubchartBrush) {
+            $$.initSubchartBrush();
+        }
+
+        /*-- Main Region --*/
+
+        // text when empty
+        main.append("text").attr("class", CLASS.text + ' ' + CLASS.empty).attr("text-anchor", "middle") // horizontal centering of text at x position in all browsers.
+        .attr("dominant-baseline", "middle"); // vertical centering of text at y position in all browsers, except IE.
+
+        // Regions
+        $$.initRegion();
+
+        // Grids
+        $$.initGrid();
+
+        // Define g for chart area
+        main.append('g').attr("clip-path", $$.clipPath).attr('class', CLASS.chart);
+
+        // Grid lines
+        if (config.grid_lines_front) {
+            $$.initGridLines();
+        }
+
+        // Cover whole with rects for events
+        $$.initEventRect();
+
+        // Define g for chart
+        $$.initChartElements();
+
+        // Add Axis
+        $$.axis.init();
+
+        // Set targets
+        $$.updateTargets($$.data.targets);
+
+        // Set default extent if defined
+        if (config.axis_x_selection) {
+            $$.brush.selectionAsValue($$.getDefaultSelection());
+        }
+
+        // Draw with targets
+        if (binding) {
+            $$.updateDimension();
+            $$.config.oninit.call($$);
+            $$.redraw({
+                withTransition: false,
+                withTransform: true,
+                withUpdateXDomain: true,
+                withUpdateOrgXDomain: true,
+                withTransitionForAxis: false
+            });
+        }
+
+        // Bind resize event
+        $$.bindResize();
+
+        // export element of the chart
+        $$.api.element = $$.selectChart.node();
+    };
+
+    ChartInternal.prototype.smoothLines = function (el, type) {
+        var $$ = this;
+        if (type === 'grid') {
+            el.each(function () {
+                var g = $$.d3.select(this),
+                    x1 = g.attr('x1'),
+                    x2 = g.attr('x2'),
+                    y1 = g.attr('y1'),
+                    y2 = g.attr('y2');
+                g.attr({
+                    'x1': Math.ceil(x1),
+                    'x2': Math.ceil(x2),
+                    'y1': Math.ceil(y1),
+                    'y2': Math.ceil(y2)
+                });
+            });
+        }
+    };
+
+    ChartInternal.prototype.updateSizes = function () {
+        var $$ = this,
+            config = $$.config;
+        var legendHeight = $$.legend ? $$.getLegendHeight() : 0,
+            legendWidth = $$.legend ? $$.getLegendWidth() : 0,
+            legendHeightForBottom = $$.isLegendRight || $$.isLegendInset ? 0 : legendHeight,
+            hasArc = $$.hasArcType(),
+            xAxisHeight = config.axis_rotated || hasArc ? 0 : $$.getHorizontalAxisHeight('x'),
+            subchartHeight = config.subchart_show && !hasArc ? config.subchart_size_height + xAxisHeight : 0;
+
+        $$.currentWidth = $$.getCurrentWidth();
+        $$.currentHeight = $$.getCurrentHeight();
+
+        // for main
+        $$.margin = config.axis_rotated ? {
+            top: $$.getHorizontalAxisHeight('y2') + $$.getCurrentPaddingTop(),
+            right: hasArc ? 0 : $$.getCurrentPaddingRight(),
+            bottom: $$.getHorizontalAxisHeight('y') + legendHeightForBottom + $$.getCurrentPaddingBottom(),
+            left: subchartHeight + (hasArc ? 0 : $$.getCurrentPaddingLeft())
+        } : {
+            top: 4 + $$.getCurrentPaddingTop(), // for top tick text
+            right: hasArc ? 0 : $$.getCurrentPaddingRight(),
+            bottom: xAxisHeight + subchartHeight + legendHeightForBottom + $$.getCurrentPaddingBottom(),
+            left: hasArc ? 0 : $$.getCurrentPaddingLeft()
+        };
+
+        // for subchart
+        $$.margin2 = config.axis_rotated ? {
+            top: $$.margin.top,
+            right: NaN,
+            bottom: 20 + legendHeightForBottom,
+            left: $$.rotated_padding_left
+        } : {
+            top: $$.currentHeight - subchartHeight - legendHeightForBottom,
+            right: NaN,
+            bottom: xAxisHeight + legendHeightForBottom,
+            left: $$.margin.left
+        };
+
+        // for legend
+        $$.margin3 = {
+            top: 0,
+            right: NaN,
+            bottom: 0,
+            left: 0
+        };
+        if ($$.updateSizeForLegend) {
+            $$.updateSizeForLegend(legendHeight, legendWidth);
+        }
+
+        $$.width = $$.currentWidth - $$.margin.left - $$.margin.right;
+        $$.height = $$.currentHeight - $$.margin.top - $$.margin.bottom;
+        if ($$.width < 0) {
+            $$.width = 0;
+        }
+        if ($$.height < 0) {
+            $$.height = 0;
+        }
+
+        $$.width2 = config.axis_rotated ? $$.margin.left - $$.rotated_padding_left - $$.rotated_padding_right : $$.width;
+        $$.height2 = config.axis_rotated ? $$.height : $$.currentHeight - $$.margin2.top - $$.margin2.bottom;
+        if ($$.width2 < 0) {
+            $$.width2 = 0;
+        }
+        if ($$.height2 < 0) {
+            $$.height2 = 0;
+        }
+
+        // for arc
+        $$.arcWidth = $$.width - ($$.isLegendRight ? legendWidth + 10 : 0);
+        $$.arcHeight = $$.height - ($$.isLegendRight ? 0 : 10);
+        if ($$.hasType('gauge') && !config.gauge_fullCircle) {
+            $$.arcHeight += $$.height - $$.getGaugeLabelHeight();
+        }
+        if ($$.updateRadius) {
+            $$.updateRadius();
+        }
+
+        if ($$.isLegendRight && hasArc) {
+            $$.margin3.left = $$.arcWidth / 2 + $$.radiusExpanded * 1.1;
+        }
+    };
+
+    ChartInternal.prototype.updateTargets = function (targets) {
+        var $$ = this;
+
+        /*-- Main --*/
+
+        //-- Text --//
+        $$.updateTargetsForText(targets);
+
+        //-- Bar --//
+        $$.updateTargetsForBar(targets);
+
+        //-- Line --//
+        $$.updateTargetsForLine(targets);
+
+        //-- Arc --//
+        if ($$.hasArcType() && $$.updateTargetsForArc) {
+            $$.updateTargetsForArc(targets);
+        }
+
+        /*-- Sub --*/
+
+        if ($$.updateTargetsForSubchart) {
+            $$.updateTargetsForSubchart(targets);
+        }
+
+        // Fade-in each chart
+        $$.showTargets();
+    };
+    ChartInternal.prototype.showTargets = function () {
+        var $$ = this;
+        $$.svg.selectAll('.' + CLASS.target).filter(function (d) {
+            return $$.isTargetToShow(d.id);
+        }).transition().duration($$.config.transition_duration).style("opacity", 1);
+    };
+
+    ChartInternal.prototype.redraw = function (options, transitions) {
+        var $$ = this,
+            main = $$.main,
+            d3 = $$.d3,
+            config = $$.config;
+        var areaIndices = $$.getShapeIndices($$.isAreaType),
+            barIndices = $$.getShapeIndices($$.isBarType),
+            lineIndices = $$.getShapeIndices($$.isLineType);
+        var withY, withSubchart, withTransition, withTransitionForExit, withTransitionForAxis, withTransform, withUpdateXDomain, withUpdateOrgXDomain, withTrimXDomain, withLegend, withEventRect, withDimension, withUpdateXAxis;
+        var hideAxis = $$.hasArcType();
+        var drawArea, drawBar, drawLine, xForText, yForText;
+        var duration, durationForExit, durationForAxis;
+        var transitionsToWait, waitForDraw, flow, transition;
+        var targetsToShow = $$.filterTargetsToShow($$.data.targets),
+            tickValues,
+            i,
+            intervalForCulling,
+            xDomainForZoom;
+        var xv = $$.xv.bind($$),
+            cx,
+            cy;
+
+        options = options || {};
+        withY = getOption(options, "withY", true);
+        withSubchart = getOption(options, "withSubchart", true);
+        withTransition = getOption(options, "withTransition", true);
+        withTransform = getOption(options, "withTransform", false);
+        withUpdateXDomain = getOption(options, "withUpdateXDomain", false);
+        withUpdateOrgXDomain = getOption(options, "withUpdateOrgXDomain", false);
+        withTrimXDomain = getOption(options, "withTrimXDomain", true);
+        withUpdateXAxis = getOption(options, "withUpdateXAxis", withUpdateXDomain);
+        withLegend = getOption(options, "withLegend", false);
+        withEventRect = getOption(options, "withEventRect", true);
+        withDimension = getOption(options, "withDimension", true);
+        withTransitionForExit = getOption(options, "withTransitionForExit", withTransition);
+        withTransitionForAxis = getOption(options, "withTransitionForAxis", withTransition);
+
+        duration = withTransition ? config.transition_duration : 0;
+        durationForExit = withTransitionForExit ? duration : 0;
+        durationForAxis = withTransitionForAxis ? duration : 0;
+
+        transitions = transitions || $$.axis.generateTransitions(durationForAxis);
+
+        // update legend and transform each g
+        if (withLegend && config.legend_show) {
+            $$.updateLegend($$.mapToIds($$.data.targets), options, transitions);
+        } else if (withDimension) {
+            // need to update dimension (e.g. axis.y.tick.values) because y tick values should change
+            // no need to update axis in it because they will be updated in redraw()
+            $$.updateDimension(true);
+        }
+
+        // MEMO: needed for grids calculation
+        if ($$.isCategorized() && targetsToShow.length === 0) {
+            $$.x.domain([0, $$.axes.x.selectAll('.tick').size()]);
+        }
+
+        if (targetsToShow.length) {
+            $$.updateXDomain(targetsToShow, withUpdateXDomain, withUpdateOrgXDomain, withTrimXDomain);
+            if (!config.axis_x_tick_values) {
+                tickValues = $$.axis.updateXAxisTickValues(targetsToShow);
+            }
+        } else {
+            $$.xAxis.tickValues([]);
+            $$.subXAxis.tickValues([]);
+        }
+
+        if (config.zoom_rescale && !options.flow) {
+            xDomainForZoom = $$.x.orgDomain();
+        }
+
+        $$.y.domain($$.getYDomain(targetsToShow, 'y', xDomainForZoom));
+        $$.y2.domain($$.getYDomain(targetsToShow, 'y2', xDomainForZoom));
+
+        if (!config.axis_y_tick_values && config.axis_y_tick_count) {
+            $$.yAxis.tickValues($$.axis.generateTickValues($$.y.domain(), config.axis_y_tick_count));
+        }
+        if (!config.axis_y2_tick_values && config.axis_y2_tick_count) {
+            $$.y2Axis.tickValues($$.axis.generateTickValues($$.y2.domain(), config.axis_y2_tick_count));
+        }
+
+        // axes
+        $$.axis.redraw(durationForAxis, hideAxis);
+
+        // Update axis label
+        $$.axis.updateLabels(withTransition);
+
+        // show/hide if manual culling needed
+        if ((withUpdateXDomain || withUpdateXAxis) && targetsToShow.length) {
+            if (config.axis_x_tick_culling && tickValues) {
+                for (i = 1; i < tickValues.length; i++) {
+                    if (tickValues.length / i < config.axis_x_tick_culling_max) {
+                        intervalForCulling = i;
+                        break;
+                    }
+                }
+                $$.svg.selectAll('.' + CLASS.axisX + ' .tick text').each(function (e) {
+                    var index = tickValues.indexOf(e);
+                    if (index >= 0) {
+                        d3.select(this).style('display', index % intervalForCulling ? 'none' : 'block');
+                    }
+                });
+            } else {
+                $$.svg.selectAll('.' + CLASS.axisX + ' .tick text').style('display', 'block');
+            }
+        }
+
+        // setup drawer - MEMO: these must be called after axis updated
+        drawArea = $$.generateDrawArea ? $$.generateDrawArea(areaIndices, false) : undefined;
+        drawBar = $$.generateDrawBar ? $$.generateDrawBar(barIndices) : undefined;
+        drawLine = $$.generateDrawLine ? $$.generateDrawLine(lineIndices, false) : undefined;
+        xForText = $$.generateXYForText(areaIndices, barIndices, lineIndices, true);
+        yForText = $$.generateXYForText(areaIndices, barIndices, lineIndices, false);
+
+        // update circleY based on updated parameters
+        $$.updateCircleY();
+        // generate circle x/y functions depending on updated params
+        cx = ($$.config.axis_rotated ? $$.circleY : $$.circleX).bind($$);
+        cy = ($$.config.axis_rotated ? $$.circleX : $$.circleY).bind($$);
+
+        // Update sub domain
+        if (withY) {
+            $$.subY.domain($$.getYDomain(targetsToShow, 'y'));
+            $$.subY2.domain($$.getYDomain(targetsToShow, 'y2'));
+        }
+
+        // xgrid focus
+        $$.updateXgridFocus();
+
+        // Data empty label positioning and text.
+        main.select("text." + CLASS.text + '.' + CLASS.empty).attr("x", $$.width / 2).attr("y", $$.height / 2).text(config.data_empty_label_text).transition().style('opacity', targetsToShow.length ? 0 : 1);
+
+        // event rect
+        if (withEventRect) {
+            $$.redrawEventRect();
+        }
+
+        // grid
+        $$.updateGrid(duration);
+
+        // rect for regions
+        $$.updateRegion(duration);
+
+        // bars
+        $$.updateBar(durationForExit);
+
+        // lines, areas and cricles
+        $$.updateLine(durationForExit);
+        $$.updateArea(durationForExit);
+        $$.updateCircle(cx, cy);
+
+        // text
+        if ($$.hasDataLabel()) {
+            $$.updateText(xForText, yForText, durationForExit);
+        }
+
+        // title
+        if ($$.redrawTitle) {
+            $$.redrawTitle();
+        }
+
+        // arc
+        if ($$.redrawArc) {
+            $$.redrawArc(duration, durationForExit, withTransform);
+        }
+
+        // subchart
+        if ($$.redrawSubchart) {
+            $$.redrawSubchart(withSubchart, transitions, duration, durationForExit, areaIndices, barIndices, lineIndices);
+        }
+
+        // circles for select
+        main.selectAll('.' + CLASS.selectedCircles).filter($$.isBarType.bind($$)).selectAll('circle').remove();
+
+        if (options.flow) {
+            flow = $$.generateFlow({
+                targets: targetsToShow,
+                flow: options.flow,
+                duration: options.flow.duration,
+                drawBar: drawBar,
+                drawLine: drawLine,
+                drawArea: drawArea,
+                cx: cx,
+                cy: cy,
+                xv: xv,
+                xForText: xForText,
+                yForText: yForText
+            });
+        }
+
+        if ($$.isTabVisible()) {
+            // Only use transition if tab visible. See #938.
+            if (duration) {
+                // transition should be derived from one transition
+                transition = d3.transition().duration(duration);
+                transitionsToWait = [];
+                [$$.redrawBar(drawBar, true, transition), $$.redrawLine(drawLine, true, transition), $$.redrawArea(drawArea, true, transition), $$.redrawCircle(cx, cy, true, transition), $$.redrawText(xForText, yForText, options.flow, true, transition), $$.redrawRegion(true, transition), $$.redrawGrid(true, transition)].forEach(function (transitions) {
+                    transitions.forEach(function (transition) {
+                        transitionsToWait.push(transition);
+                    });
+                });
+                // Wait for end of transitions to call flow and onrendered callback
+                waitForDraw = $$.generateWait();
+                transitionsToWait.forEach(function (t) {
+                    waitForDraw.add(t);
+                });
+                waitForDraw(function () {
+                    if (flow) {
+                        flow();
+                    }
+                    if (config.onrendered) {
+                        config.onrendered.call($$);
+                    }
+                });
+            } else {
+                $$.redrawBar(drawBar);
+                $$.redrawLine(drawLine);
+                $$.redrawArea(drawArea);
+                $$.redrawCircle(cx, cy);
+                $$.redrawText(xForText, yForText, options.flow);
+                $$.redrawRegion();
+                $$.redrawGrid();
+                if (flow) {
+                    flow();
+                }
+                if (config.onrendered) {
+                    config.onrendered.call($$);
+                }
+            }
+        }
+
+        // update fadein condition
+        $$.mapToIds($$.data.targets).forEach(function (id) {
+            $$.withoutFadeIn[id] = true;
+        });
+    };
+
+    ChartInternal.prototype.updateAndRedraw = function (options) {
+        var $$ = this,
+            config = $$.config,
+            transitions;
+        options = options || {};
+        // same with redraw
+        options.withTransition = getOption(options, "withTransition", true);
+        options.withTransform = getOption(options, "withTransform", false);
+        options.withLegend = getOption(options, "withLegend", false);
+        // NOT same with redraw
+        options.withUpdateXDomain = getOption(options, "withUpdateXDomain", true);
+        options.withUpdateOrgXDomain = getOption(options, "withUpdateOrgXDomain", true);
+        options.withTransitionForExit = false;
+        options.withTransitionForTransform = getOption(options, "withTransitionForTransform", options.withTransition);
+        // MEMO: this needs to be called before updateLegend and it means this ALWAYS needs to be called)
+        $$.updateSizes();
+        // MEMO: called in updateLegend in redraw if withLegend
+        if (!(options.withLegend && config.legend_show)) {
+            transitions = $$.axis.generateTransitions(options.withTransitionForAxis ? config.transition_duration : 0);
+            // Update scales
+            $$.updateScales();
+            $$.updateSvgSize();
+            // Update g positions
+            $$.transformAll(options.withTransitionForTransform, transitions);
+        }
+        // Draw with new sizes & scales
+        $$.redraw(options, transitions);
+    };
+    ChartInternal.prototype.redrawWithoutRescale = function () {
+        this.redraw({
+            withY: false,
+            withSubchart: false,
+            withEventRect: false,
+            withTransitionForAxis: false
+        });
+    };
+
+    ChartInternal.prototype.isTimeSeries = function () {
+        return this.config.axis_x_type === 'timeseries';
+    };
+    ChartInternal.prototype.isCategorized = function () {
+        return this.config.axis_x_type.indexOf('categor') >= 0;
+    };
+    ChartInternal.prototype.isCustomX = function () {
+        var $$ = this,
+            config = $$.config;
+        return !$$.isTimeSeries() && (config.data_x || notEmpty(config.data_xs));
+    };
+
+    ChartInternal.prototype.isTimeSeriesY = function () {
+        return this.config.axis_y_type === 'timeseries';
+    };
+
+    ChartInternal.prototype.getTranslate = function (target) {
+        var $$ = this,
+            config = $$.config,
+            x,
+            y;
+        if (target === 'main') {
+            x = asHalfPixel($$.margin.left);
+            y = asHalfPixel($$.margin.top);
+        } else if (target === 'context') {
+            x = asHalfPixel($$.margin2.left);
+            y = asHalfPixel($$.margin2.top);
+        } else if (target === 'legend') {
+            x = $$.margin3.left;
+            y = $$.margin3.top;
+        } else if (target === 'x') {
+            x = 0;
+            y = config.axis_rotated ? 0 : $$.height;
+        } else if (target === 'y') {
+            x = 0;
+            y = config.axis_rotated ? $$.height : 0;
+        } else if (target === 'y2') {
+            x = config.axis_rotated ? 0 : $$.width;
+            y = config.axis_rotated ? 1 : 0;
+        } else if (target === 'subx') {
+            x = 0;
+            y = config.axis_rotated ? 0 : $$.height2;
+        } else if (target === 'arc') {
+            x = $$.arcWidth / 2;
+            y = $$.arcHeight / 2 - ($$.hasType('gauge') ? 6 : 0); // to prevent wrong display of min and max label
+        }
+        return "translate(" + x + "," + y + ")";
+    };
+    ChartInternal.prototype.initialOpacity = function (d) {
+        return d.value !== null && this.withoutFadeIn[d.id] ? 1 : 0;
+    };
+    ChartInternal.prototype.initialOpacityForCircle = function (d) {
+        return d.value !== null && this.withoutFadeIn[d.id] ? this.opacityForCircle(d) : 0;
+    };
+    ChartInternal.prototype.opacityForCircle = function (d) {
+        var isPointShouldBeShown = isFunction(this.config.point_show) ? this.config.point_show(d) : this.config.point_show;
+        var opacity = isPointShouldBeShown ? 1 : 0;
+        return isValue(d.value) ? this.isScatterType(d) ? 0.5 : opacity : 0;
+    };
+    ChartInternal.prototype.opacityForText = function () {
+        return this.hasDataLabel() ? 1 : 0;
+    };
+    ChartInternal.prototype.xx = function (d) {
+        return d ? this.x(d.x) : null;
+    };
+    ChartInternal.prototype.xv = function (d) {
+        var $$ = this,
+            value = d.value;
+        if ($$.isTimeSeries()) {
+            value = $$.parseDate(d.value);
+        } else if ($$.isCategorized() && typeof d.value === 'string') {
+            value = $$.config.axis_x_categories.indexOf(d.value);
+        }
+        return Math.ceil($$.x(value));
+    };
+    ChartInternal.prototype.yv = function (d) {
+        var $$ = this,
+            yScale = d.axis && d.axis === 'y2' ? $$.y2 : $$.y;
+        return Math.ceil(yScale(d.value));
+    };
+    ChartInternal.prototype.subxx = function (d) {
+        return d ? this.subX(d.x) : null;
+    };
+
+    ChartInternal.prototype.transformMain = function (withTransition, transitions) {
+        var $$ = this,
+            xAxis,
+            yAxis,
+            y2Axis;
+        if (transitions && transitions.axisX) {
+            xAxis = transitions.axisX;
+        } else {
+            xAxis = $$.main.select('.' + CLASS.axisX);
+            if (withTransition) {
+                xAxis = xAxis.transition();
+            }
+        }
+        if (transitions && transitions.axisY) {
+            yAxis = transitions.axisY;
+        } else {
+            yAxis = $$.main.select('.' + CLASS.axisY);
+            if (withTransition) {
+                yAxis = yAxis.transition();
+            }
+        }
+        if (transitions && transitions.axisY2) {
+            y2Axis = transitions.axisY2;
+        } else {
+            y2Axis = $$.main.select('.' + CLASS.axisY2);
+            if (withTransition) {
+                y2Axis = y2Axis.transition();
+            }
+        }
+        (withTransition ? $$.main.transition() : $$.main).attr("transform", $$.getTranslate('main'));
+        xAxis.attr("transform", $$.getTranslate('x'));
+        yAxis.attr("transform", $$.getTranslate('y'));
+        y2Axis.attr("transform", $$.getTranslate('y2'));
+        $$.main.select('.' + CLASS.chartArcs).attr("transform", $$.getTranslate('arc'));
+    };
+    ChartInternal.prototype.transformAll = function (withTransition, transitions) {
+        var $$ = this;
+        $$.transformMain(withTransition, transitions);
+        if ($$.config.subchart_show) {
+            $$.transformContext(withTransition, transitions);
+        }
+        if ($$.legend) {
+            $$.transformLegend(withTransition);
+        }
+    };
+
+    ChartInternal.prototype.updateSvgSize = function () {
+        var $$ = this,
+            brush = $$.svg.select(".c3-brush .overlay");
+        $$.svg.attr('width', $$.currentWidth).attr('height', $$.currentHeight);
+        $$.svg.selectAll(['#' + $$.clipId, '#' + $$.clipIdForGrid]).select('rect').attr('width', $$.width).attr('height', $$.height);
+        $$.svg.select('#' + $$.clipIdForXAxis).select('rect').attr('x', $$.getXAxisClipX.bind($$)).attr('y', $$.getXAxisClipY.bind($$)).attr('width', $$.getXAxisClipWidth.bind($$)).attr('height', $$.getXAxisClipHeight.bind($$));
+        $$.svg.select('#' + $$.clipIdForYAxis).select('rect').attr('x', $$.getYAxisClipX.bind($$)).attr('y', $$.getYAxisClipY.bind($$)).attr('width', $$.getYAxisClipWidth.bind($$)).attr('height', $$.getYAxisClipHeight.bind($$));
+        $$.svg.select('#' + $$.clipIdForSubchart).select('rect').attr('width', $$.width).attr('height', brush.size() ? brush.attr('height') : 0);
+        // MEMO: parent div's height will be bigger than svg when <!DOCTYPE html>
+        $$.selectChart.style('max-height', $$.currentHeight + "px");
+    };
+
+    ChartInternal.prototype.updateDimension = function (withoutAxis) {
+        var $$ = this;
+        if (!withoutAxis) {
+            if ($$.config.axis_rotated) {
+                $$.axes.x.call($$.xAxis);
+                $$.axes.subx.call($$.subXAxis);
+            } else {
+                $$.axes.y.call($$.yAxis);
+                $$.axes.y2.call($$.y2Axis);
+            }
+        }
+        $$.updateSizes();
+        $$.updateScales();
+        $$.updateSvgSize();
+        $$.transformAll(false);
+    };
+
+    ChartInternal.prototype.observeInserted = function (selection) {
+        var $$ = this,
+            observer;
+        if (typeof MutationObserver === 'undefined') {
+            window.console.error("MutationObserver not defined.");
+            return;
+        }
+        observer = new MutationObserver(function (mutations) {
+            mutations.forEach(function (mutation) {
+                if (mutation.type === 'childList' && mutation.previousSibling) {
+                    observer.disconnect();
+                    // need to wait for completion of load because size calculation requires the actual sizes determined after that completion
+                    $$.intervalForObserveInserted = window.setInterval(function () {
+                        // parentNode will NOT be null when completed
+                        if (selection.node().parentNode) {
+                            window.clearInterval($$.intervalForObserveInserted);
+                            $$.updateDimension();
+                            if ($$.brush) {
+                                $$.brush.update();
+                            }
+                            $$.config.oninit.call($$);
+                            $$.redraw({
+                                withTransform: true,
+                                withUpdateXDomain: true,
+                                withUpdateOrgXDomain: true,
+                                withTransition: false,
+                                withTransitionForTransform: false,
+                                withLegend: true
+                            });
+                            selection.transition().style('opacity', 1);
+                        }
+                    }, 10);
+                }
+            });
+        });
+        observer.observe(selection.node(), {
+            attributes: true,
+            childList: true,
+            characterData: true
+        });
+    };
+
+    ChartInternal.prototype.bindResize = function () {
+        var $$ = this,
+            config = $$.config;
+
+        $$.resizeFunction = $$.generateResize(); // need to call .remove
+
+        $$.resizeFunction.add(function () {
+            config.onresize.call($$);
+        });
+        if (config.resize_auto) {
+            $$.resizeFunction.add(function () {
+                if ($$.resizeTimeout !== undefined) {
+                    window.clearTimeout($$.resizeTimeout);
+                }
+                $$.resizeTimeout = window.setTimeout(function () {
+                    delete $$.resizeTimeout;
+                    $$.updateAndRedraw({
+                        withUpdateXDomain: false,
+                        withUpdateOrgXDomain: false,
+                        withTransition: false,
+                        withTransitionForTransform: false,
+                        withLegend: true
+                    });
+                    if ($$.brush) {
+                        $$.brush.update();
+                    }
+                }, 100);
+            });
+        }
+        $$.resizeFunction.add(function () {
+            config.onresized.call($$);
+        });
+
+        $$.resizeIfElementDisplayed = function () {
+            // if element not displayed skip it
+            if ($$.api == null || !$$.api.element.offsetParent) {
+                return;
+            }
+
+            $$.resizeFunction();
+        };
+
+        if (window.attachEvent) {
+            window.attachEvent('onresize', $$.resizeIfElementDisplayed);
+        } else if (window.addEventListener) {
+            window.addEventListener('resize', $$.resizeIfElementDisplayed, false);
+        } else {
+            // fallback to this, if this is a very old browser
+            var wrapper = window.onresize;
+            if (!wrapper) {
+                // create a wrapper that will call all charts
+                wrapper = $$.generateResize();
+            } else if (!wrapper.add || !wrapper.remove) {
+                // there is already a handler registered, make sure we call it too
+                wrapper = $$.generateResize();
+                wrapper.add(window.onresize);
+            }
+            // add this graph to the wrapper, we will be removed if the user calls destroy
+            wrapper.add($$.resizeFunction);
+            window.onresize = function () {
+                // if element not displayed skip it
+                if (!$$.api.element.offsetParent) {
+                    return;
+                }
+
+                wrapper();
+            };
+        }
+    };
+
+    ChartInternal.prototype.generateResize = function () {
+        var resizeFunctions = [];
+
+        function callResizeFunctions() {
+            resizeFunctions.forEach(function (f) {
+                f();
+            });
+        }
+        callResizeFunctions.add = function (f) {
+            resizeFunctions.push(f);
+        };
+        callResizeFunctions.remove = function (f) {
+            for (var i = 0; i < resizeFunctions.length; i++) {
+                if (resizeFunctions[i] === f) {
+                    resizeFunctions.splice(i, 1);
+                    break;
+                }
+            }
+        };
+        return callResizeFunctions;
+    };
+
+    ChartInternal.prototype.endall = function (transition, callback) {
+        var n = 0;
+        transition.each(function () {
+            ++n;
+        }).on("end", function () {
+            if (! --n) {
+                callback.apply(this, arguments);
+            }
+        });
+    };
+    ChartInternal.prototype.generateWait = function () {
+        var transitionsToWait = [],
+            f = function f(callback) {
+            var timer = setInterval(function () {
+                var done = 0;
+                transitionsToWait.forEach(function (t) {
+                    if (t.empty()) {
+                        done += 1;
+                        return;
+                    }
+                    try {
+                        t.transition();
+                    } catch (e) {
+                        done += 1;
+                    }
+                });
+                if (done === transitionsToWait.length) {
+                    clearInterval(timer);
+                    if (callback) {
+                        callback();
+                    }
+                }
+            }, 50);
+        };
+        f.add = function (transition) {
+            transitionsToWait.push(transition);
+        };
+        return f;
+    };
+
+    ChartInternal.prototype.parseDate = function (date) {
+        var $$ = this,
+            parsedDate;
+        if (date instanceof Date) {
+            parsedDate = date;
+        } else if (typeof date === 'string') {
+            parsedDate = $$.dataTimeParse(date);
+        } else if ((typeof date === 'undefined' ? 'undefined' : _typeof(date)) === 'object') {
+            parsedDate = new Date(+date);
+        } else if (typeof date === 'number' && !isNaN(date)) {
+            parsedDate = new Date(+date);
+        }
+        if (!parsedDate || isNaN(+parsedDate)) {
+            window.console.error("Failed to parse x '" + date + "' to Date object");
+        }
+        return parsedDate;
+    };
+
+    ChartInternal.prototype.isTabVisible = function () {
+        var hidden;
+        if (typeof document.hidden !== "undefined") {
+            // Opera 12.10 and Firefox 18 and later support
+            hidden = "hidden";
+        } else if (typeof document.mozHidden !== "undefined") {
+            hidden = "mozHidden";
+        } else if (typeof document.msHidden !== "undefined") {
+            hidden = "msHidden";
+        } else if (typeof document.webkitHidden !== "undefined") {
+            hidden = "webkitHidden";
+        }
+
+        return document[hidden] ? false : true;
+    };
+
+    ChartInternal.prototype.getPathBox = getPathBox;
+    ChartInternal.prototype.CLASS = CLASS;
+
+    /* jshint ignore:start */
+
+    // PhantomJS doesn't have support for Function.prototype.bind, which has caused confusion. Use
+    // this polyfill to avoid the confusion.
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind#Polyfill
+
+    if (!Function.prototype.bind) {
+        Function.prototype.bind = function (oThis) {
+            if (typeof this !== 'function') {
+                // closest thing possible to the ECMAScript 5
+                // internal IsCallable function
+                throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
+            }
+
+            var aArgs = Array.prototype.slice.call(arguments, 1),
+                fToBind = this,
+                fNOP = function fNOP() {},
+                fBound = function fBound() {
+                return fToBind.apply(this instanceof fNOP ? this : oThis, aArgs.concat(Array.prototype.slice.call(arguments)));
+            };
+
+            fNOP.prototype = this.prototype;
+            fBound.prototype = new fNOP();
+
+            return fBound;
+        };
+    }
+
+    // SVGPathSeg API polyfill
+    // https://github.com/progers/pathseg
+    //
+    // This is a drop-in replacement for the SVGPathSeg and SVGPathSegList APIs that were removed from
+    // SVG2 (https://lists.w3.org/Archives/Public/www-svg/2015Jun/0044.html), including the latest spec
+    // changes which were implemented in Firefox 43 and Chrome 46.
+
+    (function () {
+
+        if (!("SVGPathSeg" in window)) {
+            // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-InterfaceSVGPathSeg
+            window.SVGPathSeg = function (type, typeAsLetter, owningPathSegList) {
+                this.pathSegType = type;
+                this.pathSegTypeAsLetter = typeAsLetter;
+                this._owningPathSegList = owningPathSegList;
+            };
+
+            window.SVGPathSeg.prototype.classname = "SVGPathSeg";
+
+            window.SVGPathSeg.PATHSEG_UNKNOWN = 0;
+            window.SVGPathSeg.PATHSEG_CLOSEPATH = 1;
+            window.SVGPathSeg.PATHSEG_MOVETO_ABS = 2;
+            window.SVGPathSeg.PATHSEG_MOVETO_REL = 3;
+            window.SVGPathSeg.PATHSEG_LINETO_ABS = 4;
+            window.SVGPathSeg.PATHSEG_LINETO_REL = 5;
+            window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS = 6;
+            window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL = 7;
+            window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS = 8;
+            window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL = 9;
+            window.SVGPathSeg.PATHSEG_ARC_ABS = 10;
+            window.SVGPathSeg.PATHSEG_ARC_REL = 11;
+            window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS = 12;
+            window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL = 13;
+            window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS = 14;
+            window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL = 15;
+            window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS = 16;
+            window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL = 17;
+            window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS = 18;
+            window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL = 19;
+
+            // Notify owning PathSegList on any changes so they can be synchronized back to the path element.
+            window.SVGPathSeg.prototype._segmentChanged = function () {
+                if (this._owningPathSegList) this._owningPathSegList.segmentChanged(this);
+            };
+
+            window.SVGPathSegClosePath = function (owningPathSegList) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CLOSEPATH, "z", owningPathSegList);
+            };
+            window.SVGPathSegClosePath.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegClosePath.prototype.toString = function () {
+                return "[object SVGPathSegClosePath]";
+            };
+            window.SVGPathSegClosePath.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter;
+            };
+            window.SVGPathSegClosePath.prototype.clone = function () {
+                return new window.SVGPathSegClosePath(undefined);
+            };
+
+            window.SVGPathSegMovetoAbs = function (owningPathSegList, x, y) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_MOVETO_ABS, "M", owningPathSegList);
+                this._x = x;
+                this._y = y;
+            };
+            window.SVGPathSegMovetoAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegMovetoAbs.prototype.toString = function () {
+                return "[object SVGPathSegMovetoAbs]";
+            };
+            window.SVGPathSegMovetoAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegMovetoAbs.prototype.clone = function () {
+                return new window.SVGPathSegMovetoAbs(undefined, this._x, this._y);
+            };
+            Object.defineProperty(window.SVGPathSegMovetoAbs.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegMovetoAbs.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegMovetoRel = function (owningPathSegList, x, y) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_MOVETO_REL, "m", owningPathSegList);
+                this._x = x;
+                this._y = y;
+            };
+            window.SVGPathSegMovetoRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegMovetoRel.prototype.toString = function () {
+                return "[object SVGPathSegMovetoRel]";
+            };
+            window.SVGPathSegMovetoRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegMovetoRel.prototype.clone = function () {
+                return new window.SVGPathSegMovetoRel(undefined, this._x, this._y);
+            };
+            Object.defineProperty(window.SVGPathSegMovetoRel.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegMovetoRel.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegLinetoAbs = function (owningPathSegList, x, y) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_ABS, "L", owningPathSegList);
+                this._x = x;
+                this._y = y;
+            };
+            window.SVGPathSegLinetoAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegLinetoAbs.prototype.toString = function () {
+                return "[object SVGPathSegLinetoAbs]";
+            };
+            window.SVGPathSegLinetoAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegLinetoAbs.prototype.clone = function () {
+                return new window.SVGPathSegLinetoAbs(undefined, this._x, this._y);
+            };
+            Object.defineProperty(window.SVGPathSegLinetoAbs.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegLinetoAbs.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegLinetoRel = function (owningPathSegList, x, y) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_REL, "l", owningPathSegList);
+                this._x = x;
+                this._y = y;
+            };
+            window.SVGPathSegLinetoRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegLinetoRel.prototype.toString = function () {
+                return "[object SVGPathSegLinetoRel]";
+            };
+            window.SVGPathSegLinetoRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegLinetoRel.prototype.clone = function () {
+                return new window.SVGPathSegLinetoRel(undefined, this._x, this._y);
+            };
+            Object.defineProperty(window.SVGPathSegLinetoRel.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegLinetoRel.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegCurvetoCubicAbs = function (owningPathSegList, x, y, x1, y1, x2, y2) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS, "C", owningPathSegList);
+                this._x = x;
+                this._y = y;
+                this._x1 = x1;
+                this._y1 = y1;
+                this._x2 = x2;
+                this._y2 = y2;
+            };
+            window.SVGPathSegCurvetoCubicAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegCurvetoCubicAbs.prototype.toString = function () {
+                return "[object SVGPathSegCurvetoCubicAbs]";
+            };
+            window.SVGPathSegCurvetoCubicAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x1 + " " + this._y1 + " " + this._x2 + " " + this._y2 + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegCurvetoCubicAbs.prototype.clone = function () {
+                return new window.SVGPathSegCurvetoCubicAbs(undefined, this._x, this._y, this._x1, this._y1, this._x2, this._y2);
+            };
+            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "x1", {
+                get: function get() {
+                    return this._x1;
+                },
+                set: function set(x1) {
+                    this._x1 = x1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "y1", {
+                get: function get() {
+                    return this._y1;
+                },
+                set: function set(y1) {
+                    this._y1 = y1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "x2", {
+                get: function get() {
+                    return this._x2;
+                },
+                set: function set(x2) {
+                    this._x2 = x2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "y2", {
+                get: function get() {
+                    return this._y2;
+                },
+                set: function set(y2) {
+                    this._y2 = y2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegCurvetoCubicRel = function (owningPathSegList, x, y, x1, y1, x2, y2) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL, "c", owningPathSegList);
+                this._x = x;
+                this._y = y;
+                this._x1 = x1;
+                this._y1 = y1;
+                this._x2 = x2;
+                this._y2 = y2;
+            };
+            window.SVGPathSegCurvetoCubicRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegCurvetoCubicRel.prototype.toString = function () {
+                return "[object SVGPathSegCurvetoCubicRel]";
+            };
+            window.SVGPathSegCurvetoCubicRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x1 + " " + this._y1 + " " + this._x2 + " " + this._y2 + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegCurvetoCubicRel.prototype.clone = function () {
+                return new window.SVGPathSegCurvetoCubicRel(undefined, this._x, this._y, this._x1, this._y1, this._x2, this._y2);
+            };
+            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "x1", {
+                get: function get() {
+                    return this._x1;
+                },
+                set: function set(x1) {
+                    this._x1 = x1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "y1", {
+                get: function get() {
+                    return this._y1;
+                },
+                set: function set(y1) {
+                    this._y1 = y1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "x2", {
+                get: function get() {
+                    return this._x2;
+                },
+                set: function set(x2) {
+                    this._x2 = x2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "y2", {
+                get: function get() {
+                    return this._y2;
+                },
+                set: function set(y2) {
+                    this._y2 = y2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegCurvetoQuadraticAbs = function (owningPathSegList, x, y, x1, y1) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS, "Q", owningPathSegList);
+                this._x = x;
+                this._y = y;
+                this._x1 = x1;
+                this._y1 = y1;
+            };
+            window.SVGPathSegCurvetoQuadraticAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegCurvetoQuadraticAbs.prototype.toString = function () {
+                return "[object SVGPathSegCurvetoQuadraticAbs]";
+            };
+            window.SVGPathSegCurvetoQuadraticAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x1 + " " + this._y1 + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegCurvetoQuadraticAbs.prototype.clone = function () {
+                return new window.SVGPathSegCurvetoQuadraticAbs(undefined, this._x, this._y, this._x1, this._y1);
+            };
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticAbs.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticAbs.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticAbs.prototype, "x1", {
+                get: function get() {
+                    return this._x1;
+                },
+                set: function set(x1) {
+                    this._x1 = x1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticAbs.prototype, "y1", {
+                get: function get() {
+                    return this._y1;
+                },
+                set: function set(y1) {
+                    this._y1 = y1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegCurvetoQuadraticRel = function (owningPathSegList, x, y, x1, y1) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL, "q", owningPathSegList);
+                this._x = x;
+                this._y = y;
+                this._x1 = x1;
+                this._y1 = y1;
+            };
+            window.SVGPathSegCurvetoQuadraticRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegCurvetoQuadraticRel.prototype.toString = function () {
+                return "[object SVGPathSegCurvetoQuadraticRel]";
+            };
+            window.SVGPathSegCurvetoQuadraticRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x1 + " " + this._y1 + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegCurvetoQuadraticRel.prototype.clone = function () {
+                return new window.SVGPathSegCurvetoQuadraticRel(undefined, this._x, this._y, this._x1, this._y1);
+            };
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticRel.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticRel.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticRel.prototype, "x1", {
+                get: function get() {
+                    return this._x1;
+                },
+                set: function set(x1) {
+                    this._x1 = x1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticRel.prototype, "y1", {
+                get: function get() {
+                    return this._y1;
+                },
+                set: function set(y1) {
+                    this._y1 = y1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegArcAbs = function (owningPathSegList, x, y, r1, r2, angle, largeArcFlag, sweepFlag) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_ARC_ABS, "A", owningPathSegList);
+                this._x = x;
+                this._y = y;
+                this._r1 = r1;
+                this._r2 = r2;
+                this._angle = angle;
+                this._largeArcFlag = largeArcFlag;
+                this._sweepFlag = sweepFlag;
+            };
+            window.SVGPathSegArcAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegArcAbs.prototype.toString = function () {
+                return "[object SVGPathSegArcAbs]";
+            };
+            window.SVGPathSegArcAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._r1 + " " + this._r2 + " " + this._angle + " " + (this._largeArcFlag ? "1" : "0") + " " + (this._sweepFlag ? "1" : "0") + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegArcAbs.prototype.clone = function () {
+                return new window.SVGPathSegArcAbs(undefined, this._x, this._y, this._r1, this._r2, this._angle, this._largeArcFlag, this._sweepFlag);
+            };
+            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "r1", {
+                get: function get() {
+                    return this._r1;
+                },
+                set: function set(r1) {
+                    this._r1 = r1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "r2", {
+                get: function get() {
+                    return this._r2;
+                },
+                set: function set(r2) {
+                    this._r2 = r2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "angle", {
+                get: function get() {
+                    return this._angle;
+                },
+                set: function set(angle) {
+                    this._angle = angle;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "largeArcFlag", {
+                get: function get() {
+                    return this._largeArcFlag;
+                },
+                set: function set(largeArcFlag) {
+                    this._largeArcFlag = largeArcFlag;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "sweepFlag", {
+                get: function get() {
+                    return this._sweepFlag;
+                },
+                set: function set(sweepFlag) {
+                    this._sweepFlag = sweepFlag;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegArcRel = function (owningPathSegList, x, y, r1, r2, angle, largeArcFlag, sweepFlag) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_ARC_REL, "a", owningPathSegList);
+                this._x = x;
+                this._y = y;
+                this._r1 = r1;
+                this._r2 = r2;
+                this._angle = angle;
+                this._largeArcFlag = largeArcFlag;
+                this._sweepFlag = sweepFlag;
+            };
+            window.SVGPathSegArcRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegArcRel.prototype.toString = function () {
+                return "[object SVGPathSegArcRel]";
+            };
+            window.SVGPathSegArcRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._r1 + " " + this._r2 + " " + this._angle + " " + (this._largeArcFlag ? "1" : "0") + " " + (this._sweepFlag ? "1" : "0") + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegArcRel.prototype.clone = function () {
+                return new window.SVGPathSegArcRel(undefined, this._x, this._y, this._r1, this._r2, this._angle, this._largeArcFlag, this._sweepFlag);
+            };
+            Object.defineProperty(window.SVGPathSegArcRel.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcRel.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcRel.prototype, "r1", {
+                get: function get() {
+                    return this._r1;
+                },
+                set: function set(r1) {
+                    this._r1 = r1;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcRel.prototype, "r2", {
+                get: function get() {
+                    return this._r2;
+                },
+                set: function set(r2) {
+                    this._r2 = r2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcRel.prototype, "angle", {
+                get: function get() {
+                    return this._angle;
+                },
+                set: function set(angle) {
+                    this._angle = angle;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcRel.prototype, "largeArcFlag", {
+                get: function get() {
+                    return this._largeArcFlag;
+                },
+                set: function set(largeArcFlag) {
+                    this._largeArcFlag = largeArcFlag;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegArcRel.prototype, "sweepFlag", {
+                get: function get() {
+                    return this._sweepFlag;
+                },
+                set: function set(sweepFlag) {
+                    this._sweepFlag = sweepFlag;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegLinetoHorizontalAbs = function (owningPathSegList, x) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS, "H", owningPathSegList);
+                this._x = x;
+            };
+            window.SVGPathSegLinetoHorizontalAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegLinetoHorizontalAbs.prototype.toString = function () {
+                return "[object SVGPathSegLinetoHorizontalAbs]";
+            };
+            window.SVGPathSegLinetoHorizontalAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x;
+            };
+            window.SVGPathSegLinetoHorizontalAbs.prototype.clone = function () {
+                return new window.SVGPathSegLinetoHorizontalAbs(undefined, this._x);
+            };
+            Object.defineProperty(window.SVGPathSegLinetoHorizontalAbs.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegLinetoHorizontalRel = function (owningPathSegList, x) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL, "h", owningPathSegList);
+                this._x = x;
+            };
+            window.SVGPathSegLinetoHorizontalRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegLinetoHorizontalRel.prototype.toString = function () {
+                return "[object SVGPathSegLinetoHorizontalRel]";
+            };
+            window.SVGPathSegLinetoHorizontalRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x;
+            };
+            window.SVGPathSegLinetoHorizontalRel.prototype.clone = function () {
+                return new window.SVGPathSegLinetoHorizontalRel(undefined, this._x);
+            };
+            Object.defineProperty(window.SVGPathSegLinetoHorizontalRel.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegLinetoVerticalAbs = function (owningPathSegList, y) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS, "V", owningPathSegList);
+                this._y = y;
+            };
+            window.SVGPathSegLinetoVerticalAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegLinetoVerticalAbs.prototype.toString = function () {
+                return "[object SVGPathSegLinetoVerticalAbs]";
+            };
+            window.SVGPathSegLinetoVerticalAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._y;
+            };
+            window.SVGPathSegLinetoVerticalAbs.prototype.clone = function () {
+                return new window.SVGPathSegLinetoVerticalAbs(undefined, this._y);
+            };
+            Object.defineProperty(window.SVGPathSegLinetoVerticalAbs.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegLinetoVerticalRel = function (owningPathSegList, y) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL, "v", owningPathSegList);
+                this._y = y;
+            };
+            window.SVGPathSegLinetoVerticalRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegLinetoVerticalRel.prototype.toString = function () {
+                return "[object SVGPathSegLinetoVerticalRel]";
+            };
+            window.SVGPathSegLinetoVerticalRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._y;
+            };
+            window.SVGPathSegLinetoVerticalRel.prototype.clone = function () {
+                return new window.SVGPathSegLinetoVerticalRel(undefined, this._y);
+            };
+            Object.defineProperty(window.SVGPathSegLinetoVerticalRel.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegCurvetoCubicSmoothAbs = function (owningPathSegList, x, y, x2, y2) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS, "S", owningPathSegList);
+                this._x = x;
+                this._y = y;
+                this._x2 = x2;
+                this._y2 = y2;
+            };
+            window.SVGPathSegCurvetoCubicSmoothAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegCurvetoCubicSmoothAbs.prototype.toString = function () {
+                return "[object SVGPathSegCurvetoCubicSmoothAbs]";
+            };
+            window.SVGPathSegCurvetoCubicSmoothAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x2 + " " + this._y2 + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegCurvetoCubicSmoothAbs.prototype.clone = function () {
+                return new window.SVGPathSegCurvetoCubicSmoothAbs(undefined, this._x, this._y, this._x2, this._y2);
+            };
+            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothAbs.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothAbs.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothAbs.prototype, "x2", {
+                get: function get() {
+                    return this._x2;
+                },
+                set: function set(x2) {
+                    this._x2 = x2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothAbs.prototype, "y2", {
+                get: function get() {
+                    return this._y2;
+                },
+                set: function set(y2) {
+                    this._y2 = y2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegCurvetoCubicSmoothRel = function (owningPathSegList, x, y, x2, y2) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL, "s", owningPathSegList);
+                this._x = x;
+                this._y = y;
+                this._x2 = x2;
+                this._y2 = y2;
+            };
+            window.SVGPathSegCurvetoCubicSmoothRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegCurvetoCubicSmoothRel.prototype.toString = function () {
+                return "[object SVGPathSegCurvetoCubicSmoothRel]";
+            };
+            window.SVGPathSegCurvetoCubicSmoothRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x2 + " " + this._y2 + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegCurvetoCubicSmoothRel.prototype.clone = function () {
+                return new window.SVGPathSegCurvetoCubicSmoothRel(undefined, this._x, this._y, this._x2, this._y2);
+            };
+            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothRel.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothRel.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothRel.prototype, "x2", {
+                get: function get() {
+                    return this._x2;
+                },
+                set: function set(x2) {
+                    this._x2 = x2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothRel.prototype, "y2", {
+                get: function get() {
+                    return this._y2;
+                },
+                set: function set(y2) {
+                    this._y2 = y2;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegCurvetoQuadraticSmoothAbs = function (owningPathSegList, x, y) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS, "T", owningPathSegList);
+                this._x = x;
+                this._y = y;
+            };
+            window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype.toString = function () {
+                return "[object SVGPathSegCurvetoQuadraticSmoothAbs]";
+            };
+            window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype.clone = function () {
+                return new window.SVGPathSegCurvetoQuadraticSmoothAbs(undefined, this._x, this._y);
+            };
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            window.SVGPathSegCurvetoQuadraticSmoothRel = function (owningPathSegList, x, y) {
+                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL, "t", owningPathSegList);
+                this._x = x;
+                this._y = y;
+            };
+            window.SVGPathSegCurvetoQuadraticSmoothRel.prototype = Object.create(window.SVGPathSeg.prototype);
+            window.SVGPathSegCurvetoQuadraticSmoothRel.prototype.toString = function () {
+                return "[object SVGPathSegCurvetoQuadraticSmoothRel]";
+            };
+            window.SVGPathSegCurvetoQuadraticSmoothRel.prototype._asPathString = function () {
+                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
+            };
+            window.SVGPathSegCurvetoQuadraticSmoothRel.prototype.clone = function () {
+                return new window.SVGPathSegCurvetoQuadraticSmoothRel(undefined, this._x, this._y);
+            };
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticSmoothRel.prototype, "x", {
+                get: function get() {
+                    return this._x;
+                },
+                set: function set(x) {
+                    this._x = x;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathSegCurvetoQuadraticSmoothRel.prototype, "y", {
+                get: function get() {
+                    return this._y;
+                },
+                set: function set(y) {
+                    this._y = y;
+                    this._segmentChanged();
+                },
+                enumerable: true
+            });
+
+            // Add createSVGPathSeg* functions to window.SVGPathElement.
+            // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-Interfacewindow.SVGPathElement.
+            window.SVGPathElement.prototype.createSVGPathSegClosePath = function () {
+                return new window.SVGPathSegClosePath(undefined);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegMovetoAbs = function (x, y) {
+                return new window.SVGPathSegMovetoAbs(undefined, x, y);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegMovetoRel = function (x, y) {
+                return new window.SVGPathSegMovetoRel(undefined, x, y);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegLinetoAbs = function (x, y) {
+                return new window.SVGPathSegLinetoAbs(undefined, x, y);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegLinetoRel = function (x, y) {
+                return new window.SVGPathSegLinetoRel(undefined, x, y);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegCurvetoCubicAbs = function (x, y, x1, y1, x2, y2) {
+                return new window.SVGPathSegCurvetoCubicAbs(undefined, x, y, x1, y1, x2, y2);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegCurvetoCubicRel = function (x, y, x1, y1, x2, y2) {
+                return new window.SVGPathSegCurvetoCubicRel(undefined, x, y, x1, y1, x2, y2);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegCurvetoQuadraticAbs = function (x, y, x1, y1) {
+                return new window.SVGPathSegCurvetoQuadraticAbs(undefined, x, y, x1, y1);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegCurvetoQuadraticRel = function (x, y, x1, y1) {
+                return new window.SVGPathSegCurvetoQuadraticRel(undefined, x, y, x1, y1);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegArcAbs = function (x, y, r1, r2, angle, largeArcFlag, sweepFlag) {
+                return new window.SVGPathSegArcAbs(undefined, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegArcRel = function (x, y, r1, r2, angle, largeArcFlag, sweepFlag) {
+                return new window.SVGPathSegArcRel(undefined, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegLinetoHorizontalAbs = function (x) {
+                return new window.SVGPathSegLinetoHorizontalAbs(undefined, x);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegLinetoHorizontalRel = function (x) {
+                return new window.SVGPathSegLinetoHorizontalRel(undefined, x);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegLinetoVerticalAbs = function (y) {
+                return new window.SVGPathSegLinetoVerticalAbs(undefined, y);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegLinetoVerticalRel = function (y) {
+                return new window.SVGPathSegLinetoVerticalRel(undefined, y);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegCurvetoCubicSmoothAbs = function (x, y, x2, y2) {
+                return new window.SVGPathSegCurvetoCubicSmoothAbs(undefined, x, y, x2, y2);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegCurvetoCubicSmoothRel = function (x, y, x2, y2) {
+                return new window.SVGPathSegCurvetoCubicSmoothRel(undefined, x, y, x2, y2);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegCurvetoQuadraticSmoothAbs = function (x, y) {
+                return new window.SVGPathSegCurvetoQuadraticSmoothAbs(undefined, x, y);
+            };
+            window.SVGPathElement.prototype.createSVGPathSegCurvetoQuadraticSmoothRel = function (x, y) {
+                return new window.SVGPathSegCurvetoQuadraticSmoothRel(undefined, x, y);
+            };
+
+            if (!("getPathSegAtLength" in window.SVGPathElement.prototype)) {
+                // Add getPathSegAtLength to SVGPathElement.
+                // Spec: https://www.w3.org/TR/SVG11/single-page.html#paths-__svg__SVGPathElement__getPathSegAtLength
+                // This polyfill requires SVGPathElement.getTotalLength to implement the distance-along-a-path algorithm.
+                window.SVGPathElement.prototype.getPathSegAtLength = function (distance) {
+                    if (distance === undefined || !isFinite(distance)) throw "Invalid arguments.";
+
+                    var measurementElement = document.createElementNS("http://www.w3.org/2000/svg", "path");
+                    measurementElement.setAttribute("d", this.getAttribute("d"));
+                    var lastPathSegment = measurementElement.pathSegList.numberOfItems - 1;
+
+                    // If the path is empty, return 0.
+                    if (lastPathSegment <= 0) return 0;
+
+                    do {
+                        measurementElement.pathSegList.removeItem(lastPathSegment);
+                        if (distance > measurementElement.getTotalLength()) break;
+                        lastPathSegment--;
+                    } while (lastPathSegment > 0);
+                    return lastPathSegment;
+                };
+            }
+        }
+
+        if (!("SVGPathSegList" in window)) {
+            // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-InterfaceSVGPathSegList
+            window.SVGPathSegList = function (pathElement) {
+                this._pathElement = pathElement;
+                this._list = this._parsePath(this._pathElement.getAttribute("d"));
+
+                // Use a MutationObserver to catch changes to the path's "d" attribute.
+                this._mutationObserverConfig = {
+                    "attributes": true,
+                    "attributeFilter": ["d"]
+                };
+                this._pathElementMutationObserver = new MutationObserver(this._updateListFromPathMutations.bind(this));
+                this._pathElementMutationObserver.observe(this._pathElement, this._mutationObserverConfig);
+            };
+
+            window.SVGPathSegList.prototype.classname = "SVGPathSegList";
+
+            Object.defineProperty(window.SVGPathSegList.prototype, "numberOfItems", {
+                get: function get() {
+                    this._checkPathSynchronizedToList();
+                    return this._list.length;
+                },
+                enumerable: true
+            });
+
+            // Add the pathSegList accessors to window.SVGPathElement.
+            // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-InterfaceSVGAnimatedPathData
+            Object.defineProperty(window.SVGPathElement.prototype, "pathSegList", {
+                get: function get() {
+                    if (!this._pathSegList) this._pathSegList = new window.SVGPathSegList(this);
+                    return this._pathSegList;
+                },
+                enumerable: true
+            });
+            // FIXME: The following are not implemented and simply return window.SVGPathElement.pathSegList.
+            Object.defineProperty(window.SVGPathElement.prototype, "normalizedPathSegList", {
+                get: function get() {
+                    return this.pathSegList;
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathElement.prototype, "animatedPathSegList", {
+                get: function get() {
+                    return this.pathSegList;
+                },
+                enumerable: true
+            });
+            Object.defineProperty(window.SVGPathElement.prototype, "animatedNormalizedPathSegList", {
+                get: function get() {
+                    return this.pathSegList;
+                },
+                enumerable: true
+            });
+
+            // Process any pending mutations to the path element and update the list as needed.
+            // This should be the first call of all public functions and is needed because
+            // MutationObservers are not synchronous so we can have pending asynchronous mutations.
+            window.SVGPathSegList.prototype._checkPathSynchronizedToList = function () {
+                this._updateListFromPathMutations(this._pathElementMutationObserver.takeRecords());
+            };
+
+            window.SVGPathSegList.prototype._updateListFromPathMutations = function (mutationRecords) {
+                if (!this._pathElement) return;
+                var hasPathMutations = false;
+                mutationRecords.forEach(function (record) {
+                    if (record.attributeName == "d") hasPathMutations = true;
+                });
+                if (hasPathMutations) this._list = this._parsePath(this._pathElement.getAttribute("d"));
+            };
+
+            // Serialize the list and update the path's 'd' attribute.
+            window.SVGPathSegList.prototype._writeListToPath = function () {
+                this._pathElementMutationObserver.disconnect();
+                this._pathElement.setAttribute("d", window.SVGPathSegList._pathSegArrayAsString(this._list));
+                this._pathElementMutationObserver.observe(this._pathElement, this._mutationObserverConfig);
+            };
+
+            // When a path segment changes the list needs to be synchronized back to the path element.
+            window.SVGPathSegList.prototype.segmentChanged = function (pathSeg) {
+                this._writeListToPath();
+            };
+
+            window.SVGPathSegList.prototype.clear = function () {
+                this._checkPathSynchronizedToList();
+
+                this._list.forEach(function (pathSeg) {
+                    pathSeg._owningPathSegList = null;
+                });
+                this._list = [];
+                this._writeListToPath();
+            };
+
+            window.SVGPathSegList.prototype.initialize = function (newItem) {
+                this._checkPathSynchronizedToList();
+
+                this._list = [newItem];
+                newItem._owningPathSegList = this;
+                this._writeListToPath();
+                return newItem;
+            };
+
+            window.SVGPathSegList.prototype._checkValidIndex = function (index) {
+                if (isNaN(index) || index < 0 || index >= this.numberOfItems) throw "INDEX_SIZE_ERR";
+            };
+
+            window.SVGPathSegList.prototype.getItem = function (index) {
+                this._checkPathSynchronizedToList();
+
+                this._checkValidIndex(index);
+                return this._list[index];
+            };
+
+            window.SVGPathSegList.prototype.insertItemBefore = function (newItem, index) {
+                this._checkPathSynchronizedToList();
+
+                // Spec: If the index is greater than or equal to numberOfItems, then the new item is appended to the end of the list.
+                if (index > this.numberOfItems) index = this.numberOfItems;
+                if (newItem._owningPathSegList) {
+                    // SVG2 spec says to make a copy.
+                    newItem = newItem.clone();
+                }
+                this._list.splice(index, 0, newItem);
+                newItem._owningPathSegList = this;
+                this._writeListToPath();
+                return newItem;
+            };
+
+            window.SVGPathSegList.prototype.replaceItem = function (newItem, index) {
+                this._checkPathSynchronizedToList();
+
+                if (newItem._owningPathSegList) {
+                    // SVG2 spec says to make a copy.
+                    newItem = newItem.clone();
+                }
+                this._checkValidIndex(index);
+                this._list[index] = newItem;
+                newItem._owningPathSegList = this;
+                this._writeListToPath();
+                return newItem;
+            };
+
+            window.SVGPathSegList.prototype.removeItem = function (index) {
+                this._checkPathSynchronizedToList();
+
+                this._checkValidIndex(index);
+                var item = this._list[index];
+                this._list.splice(index, 1);
+                this._writeListToPath();
+                return item;
+            };
+
+            window.SVGPathSegList.prototype.appendItem = function (newItem) {
+                this._checkPathSynchronizedToList();
+
+                if (newItem._owningPathSegList) {
+                    // SVG2 spec says to make a copy.
+                    newItem = newItem.clone();
+                }
+                this._list.push(newItem);
+                newItem._owningPathSegList = this;
+                // TODO: Optimize this to just append to the existing attribute.
+                this._writeListToPath();
+                return newItem;
+            };
+
+            window.SVGPathSegList._pathSegArrayAsString = function (pathSegArray) {
+                var string = "";
+                var first = true;
+                pathSegArray.forEach(function (pathSeg) {
+                    if (first) {
+                        first = false;
+                        string += pathSeg._asPathString();
+                    } else {
+                        string += " " + pathSeg._asPathString();
+                    }
+                });
+                return string;
+            };
+
+            // This closely follows SVGPathParser::parsePath from Source/core/svg/SVGPathParser.cpp.
+            window.SVGPathSegList.prototype._parsePath = function (string) {
+                if (!string || string.length == 0) return [];
+
+                var owningPathSegList = this;
+
+                var Builder = function Builder() {
+                    this.pathSegList = [];
+                };
+
+                Builder.prototype.appendSegment = function (pathSeg) {
+                    this.pathSegList.push(pathSeg);
+                };
+
+                var Source = function Source(string) {
+                    this._string = string;
+                    this._currentIndex = 0;
+                    this._endIndex = this._string.length;
+                    this._previousCommand = window.SVGPathSeg.PATHSEG_UNKNOWN;
+
+                    this._skipOptionalSpaces();
+                };
+
+                Source.prototype._isCurrentSpace = function () {
+                    var character = this._string[this._currentIndex];
+                    return character <= " " && (character == " " || character == "\n" || character == "\t" || character == "\r" || character == "\f");
+                };
+
+                Source.prototype._skipOptionalSpaces = function () {
+                    while (this._currentIndex < this._endIndex && this._isCurrentSpace()) {
+                        this._currentIndex++;
+                    }return this._currentIndex < this._endIndex;
+                };
+
+                Source.prototype._skipOptionalSpacesOrDelimiter = function () {
+                    if (this._currentIndex < this._endIndex && !this._isCurrentSpace() && this._string.charAt(this._currentIndex) != ",") return false;
+                    if (this._skipOptionalSpaces()) {
+                        if (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) == ",") {
+                            this._currentIndex++;
+                            this._skipOptionalSpaces();
+                        }
+                    }
+                    return this._currentIndex < this._endIndex;
+                };
+
+                Source.prototype.hasMoreData = function () {
+                    return this._currentIndex < this._endIndex;
+                };
+
+                Source.prototype.peekSegmentType = function () {
+                    var lookahead = this._string[this._currentIndex];
+                    return this._pathSegTypeFromChar(lookahead);
+                };
+
+                Source.prototype._pathSegTypeFromChar = function (lookahead) {
+                    switch (lookahead) {
+                        case "Z":
+                        case "z":
+                            return window.SVGPathSeg.PATHSEG_CLOSEPATH;
+                        case "M":
+                            return window.SVGPathSeg.PATHSEG_MOVETO_ABS;
+                        case "m":
+                            return window.SVGPathSeg.PATHSEG_MOVETO_REL;
+                        case "L":
+                            return window.SVGPathSeg.PATHSEG_LINETO_ABS;
+                        case "l":
+                            return window.SVGPathSeg.PATHSEG_LINETO_REL;
+                        case "C":
+                            return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS;
+                        case "c":
+                            return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL;
+                        case "Q":
+                            return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS;
+                        case "q":
+                            return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL;
+                        case "A":
+                            return window.SVGPathSeg.PATHSEG_ARC_ABS;
+                        case "a":
+                            return window.SVGPathSeg.PATHSEG_ARC_REL;
+                        case "H":
+                            return window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS;
+                        case "h":
+                            return window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL;
+                        case "V":
+                            return window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS;
+                        case "v":
+                            return window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL;
+                        case "S":
+                            return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS;
+                        case "s":
+                            return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL;
+                        case "T":
+                            return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS;
+                        case "t":
+                            return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL;
+                        default:
+                            return window.SVGPathSeg.PATHSEG_UNKNOWN;
+                    }
+                };
+
+                Source.prototype._nextCommandHelper = function (lookahead, previousCommand) {
+                    // Check for remaining coordinates in the current command.
+                    if ((lookahead == "+" || lookahead == "-" || lookahead == "." || lookahead >= "0" && lookahead <= "9") && previousCommand != window.SVGPathSeg.PATHSEG_CLOSEPATH) {
+                        if (previousCommand == window.SVGPathSeg.PATHSEG_MOVETO_ABS) return window.SVGPathSeg.PATHSEG_LINETO_ABS;
+                        if (previousCommand == window.SVGPathSeg.PATHSEG_MOVETO_REL) return window.SVGPathSeg.PATHSEG_LINETO_REL;
+                        return previousCommand;
+                    }
+                    return window.SVGPathSeg.PATHSEG_UNKNOWN;
+                };
+
+                Source.prototype.initialCommandIsMoveTo = function () {
+                    // If the path is empty it is still valid, so return true.
+                    if (!this.hasMoreData()) return true;
+                    var command = this.peekSegmentType();
+                    // Path must start with moveTo.
+                    return command == window.SVGPathSeg.PATHSEG_MOVETO_ABS || command == window.SVGPathSeg.PATHSEG_MOVETO_REL;
+                };
+
+                // Parse a number from an SVG path. This very closely follows genericParseNumber(...) from Source/core/svg/SVGParserUtilities.cpp.
+                // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-PathDataBNF
+                Source.prototype._parseNumber = function () {
+                    var exponent = 0;
+                    var integer = 0;
+                    var frac = 1;
+                    var decimal = 0;
+                    var sign = 1;
+                    var expsign = 1;
+
+                    var startIndex = this._currentIndex;
+
+                    this._skipOptionalSpaces();
+
+                    // Read the sign.
+                    if (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) == "+") this._currentIndex++;else if (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) == "-") {
+                        this._currentIndex++;
+                        sign = -1;
+                    }
+
+                    if (this._currentIndex == this._endIndex || (this._string.charAt(this._currentIndex) < "0" || this._string.charAt(this._currentIndex) > "9") && this._string.charAt(this._currentIndex) != ".")
+                        // The first character of a number must be one of [0-9+-.].
+                        return undefined;
+
+                    // Read the integer part, build right-to-left.
+                    var startIntPartIndex = this._currentIndex;
+                    while (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) >= "0" && this._string.charAt(this._currentIndex) <= "9") {
+                        this._currentIndex++;
+                    } // Advance to first non-digit.
+
+                    if (this._currentIndex != startIntPartIndex) {
+                        var scanIntPartIndex = this._currentIndex - 1;
+                        var multiplier = 1;
+                        while (scanIntPartIndex >= startIntPartIndex) {
+                            integer += multiplier * (this._string.charAt(scanIntPartIndex--) - "0");
+                            multiplier *= 10;
+                        }
+                    }
+
+                    // Read the decimals.
+                    if (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) == ".") {
+                        this._currentIndex++;
+
+                        // There must be a least one digit following the .
+                        if (this._currentIndex >= this._endIndex || this._string.charAt(this._currentIndex) < "0" || this._string.charAt(this._currentIndex) > "9") return undefined;
+                        while (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) >= "0" && this._string.charAt(this._currentIndex) <= "9") {
+                            frac *= 10;
+                            decimal += (this._string.charAt(this._currentIndex) - "0") / frac;
+                            this._currentIndex += 1;
+                        }
+                    }
+
+                    // Read the exponent part.
+                    if (this._currentIndex != startIndex && this._currentIndex + 1 < this._endIndex && (this._string.charAt(this._currentIndex) == "e" || this._string.charAt(this._currentIndex) == "E") && this._string.charAt(this._currentIndex + 1) != "x" && this._string.charAt(this._currentIndex + 1) != "m") {
+                        this._currentIndex++;
+
+                        // Read the sign of the exponent.
+                        if (this._string.charAt(this._currentIndex) == "+") {
+                            this._currentIndex++;
+                        } else if (this._string.charAt(this._currentIndex) == "-") {
+                            this._currentIndex++;
+                            expsign = -1;
+                        }
+
+                        // There must be an exponent.
+                        if (this._currentIndex >= this._endIndex || this._string.charAt(this._currentIndex) < "0" || this._string.charAt(this._currentIndex) > "9") return undefined;
+
+                        while (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) >= "0" && this._string.charAt(this._currentIndex) <= "9") {
+                            exponent *= 10;
+                            exponent += this._string.charAt(this._currentIndex) - "0";
+                            this._currentIndex++;
+                        }
+                    }
+
+                    var number = integer + decimal;
+                    number *= sign;
+
+                    if (exponent) number *= Math.pow(10, expsign * exponent);
+
+                    if (startIndex == this._currentIndex) return undefined;
+
+                    this._skipOptionalSpacesOrDelimiter();
+
+                    return number;
+                };
+
+                Source.prototype._parseArcFlag = function () {
+                    if (this._currentIndex >= this._endIndex) return undefined;
+                    var flag = false;
+                    var flagChar = this._string.charAt(this._currentIndex++);
+                    if (flagChar == "0") flag = false;else if (flagChar == "1") flag = true;else return undefined;
+
+                    this._skipOptionalSpacesOrDelimiter();
+                    return flag;
+                };
+
+                Source.prototype.parseSegment = function () {
+                    var lookahead = this._string[this._currentIndex];
+                    var command = this._pathSegTypeFromChar(lookahead);
+                    if (command == window.SVGPathSeg.PATHSEG_UNKNOWN) {
+                        // Possibly an implicit command. Not allowed if this is the first command.
+                        if (this._previousCommand == window.SVGPathSeg.PATHSEG_UNKNOWN) return null;
+                        command = this._nextCommandHelper(lookahead, this._previousCommand);
+                        if (command == window.SVGPathSeg.PATHSEG_UNKNOWN) return null;
+                    } else {
+                        this._currentIndex++;
+                    }
+
+                    this._previousCommand = command;
+
+                    switch (command) {
+                        case window.SVGPathSeg.PATHSEG_MOVETO_REL:
+                            return new window.SVGPathSegMovetoRel(owningPathSegList, this._parseNumber(), this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_MOVETO_ABS:
+                            return new window.SVGPathSegMovetoAbs(owningPathSegList, this._parseNumber(), this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_LINETO_REL:
+                            return new window.SVGPathSegLinetoRel(owningPathSegList, this._parseNumber(), this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_LINETO_ABS:
+                            return new window.SVGPathSegLinetoAbs(owningPathSegList, this._parseNumber(), this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL:
+                            return new window.SVGPathSegLinetoHorizontalRel(owningPathSegList, this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS:
+                            return new window.SVGPathSegLinetoHorizontalAbs(owningPathSegList, this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL:
+                            return new window.SVGPathSegLinetoVerticalRel(owningPathSegList, this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS:
+                            return new window.SVGPathSegLinetoVerticalAbs(owningPathSegList, this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_CLOSEPATH:
+                            this._skipOptionalSpaces();
+                            return new window.SVGPathSegClosePath(owningPathSegList);
+                        case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL:
+                            var points = {
+                                x1: this._parseNumber(),
+                                y1: this._parseNumber(),
+                                x2: this._parseNumber(),
+                                y2: this._parseNumber(),
+                                x: this._parseNumber(),
+                                y: this._parseNumber()
+                            };
+                            return new window.SVGPathSegCurvetoCubicRel(owningPathSegList, points.x, points.y, points.x1, points.y1, points.x2, points.y2);
+                        case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS:
+                            var points = {
+                                x1: this._parseNumber(),
+                                y1: this._parseNumber(),
+                                x2: this._parseNumber(),
+                                y2: this._parseNumber(),
+                                x: this._parseNumber(),
+                                y: this._parseNumber()
+                            };
+                            return new window.SVGPathSegCurvetoCubicAbs(owningPathSegList, points.x, points.y, points.x1, points.y1, points.x2, points.y2);
+                        case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL:
+                            var points = {
+                                x2: this._parseNumber(),
+                                y2: this._parseNumber(),
+                                x: this._parseNumber(),
+                                y: this._parseNumber()
+                            };
+                            return new window.SVGPathSegCurvetoCubicSmoothRel(owningPathSegList, points.x, points.y, points.x2, points.y2);
+                        case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS:
+                            var points = {
+                                x2: this._parseNumber(),
+                                y2: this._parseNumber(),
+                                x: this._parseNumber(),
+                                y: this._parseNumber()
+                            };
+                            return new window.SVGPathSegCurvetoCubicSmoothAbs(owningPathSegList, points.x, points.y, points.x2, points.y2);
+                        case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL:
+                            var points = {
+                                x1: this._parseNumber(),
+                                y1: this._parseNumber(),
+                                x: this._parseNumber(),
+                                y: this._parseNumber()
+                            };
+                            return new window.SVGPathSegCurvetoQuadraticRel(owningPathSegList, points.x, points.y, points.x1, points.y1);
+                        case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS:
+                            var points = {
+                                x1: this._parseNumber(),
+                                y1: this._parseNumber(),
+                                x: this._parseNumber(),
+                                y: this._parseNumber()
+                            };
+                            return new window.SVGPathSegCurvetoQuadraticAbs(owningPathSegList, points.x, points.y, points.x1, points.y1);
+                        case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL:
+                            return new window.SVGPathSegCurvetoQuadraticSmoothRel(owningPathSegList, this._parseNumber(), this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS:
+                            return new window.SVGPathSegCurvetoQuadraticSmoothAbs(owningPathSegList, this._parseNumber(), this._parseNumber());
+                        case window.SVGPathSeg.PATHSEG_ARC_REL:
+                            var points = {
+                                x1: this._parseNumber(),
+                                y1: this._parseNumber(),
+                                arcAngle: this._parseNumber(),
+                                arcLarge: this._parseArcFlag(),
+                                arcSweep: this._parseArcFlag(),
+                                x: this._parseNumber(),
+                                y: this._parseNumber()
+                            };
+                            return new window.SVGPathSegArcRel(owningPathSegList, points.x, points.y, points.x1, points.y1, points.arcAngle, points.arcLarge, points.arcSweep);
+                        case window.SVGPathSeg.PATHSEG_ARC_ABS:
+                            var points = {
+                                x1: this._parseNumber(),
+                                y1: this._parseNumber(),
+                                arcAngle: this._parseNumber(),
+                                arcLarge: this._parseArcFlag(),
+                                arcSweep: this._parseArcFlag(),
+                                x: this._parseNumber(),
+                                y: this._parseNumber()
+                            };
+                            return new window.SVGPathSegArcAbs(owningPathSegList, points.x, points.y, points.x1, points.y1, points.arcAngle, points.arcLarge, points.arcSweep);
+                        default:
+                            throw "Unknown path seg type.";
+                    }
+                };
+
+                var builder = new Builder();
+                var source = new Source(string);
+
+                if (!source.initialCommandIsMoveTo()) return [];
+                while (source.hasMoreData()) {
+                    var pathSeg = source.parseSegment();
+                    if (!pathSeg) return [];
+                    builder.appendSegment(pathSeg);
+                }
+
+                return builder.pathSegList;
+            };
+        }
+    })();
+
+    // String.padEnd polyfill for IE11
+    //
+    // https://github.com/uxitten/polyfill/blob/master/string.polyfill.js
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padEnd
+    if (!String.prototype.padEnd) {
+        String.prototype.padEnd = function padEnd(targetLength, padString) {
+            targetLength = targetLength >> 0; //floor if number or convert non-number to 0;
+            padString = String(typeof padString !== 'undefined' ? padString : ' ');
+            if (this.length > targetLength) {
+                return String(this);
+            } else {
+                targetLength = targetLength - this.length;
+                if (targetLength > padString.length) {
+                    padString += padString.repeat(targetLength / padString.length); //append to original to ensure we are longer than needed
+                }
+                return String(this) + padString.slice(0, targetLength);
+            }
+        };
+    }
+
+    /* jshint ignore:end */
+
+    Chart.prototype.axis = function () {};
+    Chart.prototype.axis.labels = function (labels) {
+        var $$ = this.internal;
+        if (arguments.length) {
+            Object.keys(labels).forEach(function (axisId) {
+                $$.axis.setLabelText(axisId, labels[axisId]);
+            });
+            $$.axis.updateLabels();
+        }
+        // TODO: return some values?
+    };
+    Chart.prototype.axis.max = function (max) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (arguments.length) {
+            if ((typeof max === 'undefined' ? 'undefined' : _typeof(max)) === 'object') {
+                if (isValue(max.x)) {
+                    config.axis_x_max = max.x;
+                }
+                if (isValue(max.y)) {
+                    config.axis_y_max = max.y;
+                }
+                if (isValue(max.y2)) {
+                    config.axis_y2_max = max.y2;
+                }
+            } else {
+                config.axis_y_max = config.axis_y2_max = max;
+            }
+            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
+        } else {
+            return {
+                x: config.axis_x_max,
+                y: config.axis_y_max,
+                y2: config.axis_y2_max
+            };
+        }
+    };
+    Chart.prototype.axis.min = function (min) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (arguments.length) {
+            if ((typeof min === 'undefined' ? 'undefined' : _typeof(min)) === 'object') {
+                if (isValue(min.x)) {
+                    config.axis_x_min = min.x;
+                }
+                if (isValue(min.y)) {
+                    config.axis_y_min = min.y;
+                }
+                if (isValue(min.y2)) {
+                    config.axis_y2_min = min.y2;
+                }
+            } else {
+                config.axis_y_min = config.axis_y2_min = min;
+            }
+            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
+        } else {
+            return {
+                x: config.axis_x_min,
+                y: config.axis_y_min,
+                y2: config.axis_y2_min
+            };
+        }
+    };
+    Chart.prototype.axis.range = function (range) {
+        if (arguments.length) {
+            if (isDefined(range.max)) {
+                this.axis.max(range.max);
+            }
+            if (isDefined(range.min)) {
+                this.axis.min(range.min);
+            }
+        } else {
+            return {
+                max: this.axis.max(),
+                min: this.axis.min()
+            };
+        }
+    };
+
+    Chart.prototype.category = function (i, category) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (arguments.length > 1) {
+            config.axis_x_categories[i] = category;
+            $$.redraw();
+        }
+        return config.axis_x_categories[i];
+    };
+    Chart.prototype.categories = function (categories) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!arguments.length) {
+            return config.axis_x_categories;
+        }
+        config.axis_x_categories = categories;
+        $$.redraw();
+        return config.axis_x_categories;
+    };
+
+    Chart.prototype.resize = function (size) {
+        var $$ = this.internal,
+            config = $$.config;
+        config.size_width = size ? size.width : null;
+        config.size_height = size ? size.height : null;
+        this.flush();
+    };
+
+    Chart.prototype.flush = function () {
+        var $$ = this.internal;
+        $$.updateAndRedraw({ withLegend: true, withTransition: false, withTransitionForTransform: false });
+    };
+
+    Chart.prototype.destroy = function () {
+        var $$ = this.internal;
+
+        window.clearInterval($$.intervalForObserveInserted);
+
+        if ($$.resizeTimeout !== undefined) {
+            window.clearTimeout($$.resizeTimeout);
+        }
+
+        if (window.detachEvent) {
+            window.detachEvent('onresize', $$.resizeIfElementDisplayed);
+        } else if (window.removeEventListener) {
+            window.removeEventListener('resize', $$.resizeIfElementDisplayed);
+        } else {
+            var wrapper = window.onresize;
+            // check if no one else removed our wrapper and remove our resizeFunction from it
+            if (wrapper && wrapper.add && wrapper.remove) {
+                wrapper.remove($$.resizeFunction);
+            }
+        }
+
+        // remove the inner resize functions
+        $$.resizeFunction.remove();
+
+        $$.selectChart.classed('c3', false).html("");
+
+        // MEMO: this is needed because the reference of some elements will not be released, then memory leak will happen.
+        Object.keys($$).forEach(function (key) {
+            $$[key] = null;
+        });
+
+        return null;
+    };
+
+    // TODO: fix
+    Chart.prototype.color = function (id) {
+        var $$ = this.internal;
+        return $$.color(id); // more patterns
+    };
+
+    Chart.prototype.data = function (targetIds) {
+        var targets = this.internal.data.targets;
+        return typeof targetIds === 'undefined' ? targets : targets.filter(function (t) {
+            return [].concat(targetIds).indexOf(t.id) >= 0;
+        });
+    };
+    Chart.prototype.data.shown = function (targetIds) {
+        return this.internal.filterTargetsToShow(this.data(targetIds));
+    };
+    Chart.prototype.data.values = function (targetId) {
+        var targets,
+            values = null;
+        if (targetId) {
+            targets = this.data(targetId);
+            values = targets[0] ? targets[0].values.map(function (d) {
+                return d.value;
+            }) : null;
+        }
+        return values;
+    };
+    Chart.prototype.data.names = function (names) {
+        this.internal.clearLegendItemTextBoxCache();
+        return this.internal.updateDataAttributes('names', names);
+    };
+    Chart.prototype.data.colors = function (colors) {
+        return this.internal.updateDataAttributes('colors', colors);
+    };
+    Chart.prototype.data.axes = function (axes) {
+        return this.internal.updateDataAttributes('axes', axes);
+    };
+
+    Chart.prototype.flow = function (args) {
+        var $$ = this.internal,
+            targets,
+            data,
+            notfoundIds = [],
+            orgDataCount = $$.getMaxDataCount(),
+            dataCount,
+            domain,
+            baseTarget,
+            baseValue,
+            length = 0,
+            tail = 0,
+            diff,
+            to;
+
+        if (args.json) {
+            data = $$.convertJsonToData(args.json, args.keys);
+        } else if (args.rows) {
+            data = $$.convertRowsToData(args.rows);
+        } else if (args.columns) {
+            data = $$.convertColumnsToData(args.columns);
+        } else {
+            return;
+        }
+        targets = $$.convertDataToTargets(data, true);
+
+        // Update/Add data
+        $$.data.targets.forEach(function (t) {
+            var found = false,
+                i,
+                j;
+            for (i = 0; i < targets.length; i++) {
+                if (t.id === targets[i].id) {
+                    found = true;
+
+                    if (t.values[t.values.length - 1]) {
+                        tail = t.values[t.values.length - 1].index + 1;
+                    }
+                    length = targets[i].values.length;
+
+                    for (j = 0; j < length; j++) {
+                        targets[i].values[j].index = tail + j;
+                        if (!$$.isTimeSeries()) {
+                            targets[i].values[j].x = tail + j;
+                        }
+                    }
+                    t.values = t.values.concat(targets[i].values);
+
+                    targets.splice(i, 1);
+                    break;
+                }
+            }
+            if (!found) {
+                notfoundIds.push(t.id);
+            }
+        });
+
+        // Append null for not found targets
+        $$.data.targets.forEach(function (t) {
+            var i, j;
+            for (i = 0; i < notfoundIds.length; i++) {
+                if (t.id === notfoundIds[i]) {
+                    tail = t.values[t.values.length - 1].index + 1;
+                    for (j = 0; j < length; j++) {
+                        t.values.push({
+                            id: t.id,
+                            index: tail + j,
+                            x: $$.isTimeSeries() ? $$.getOtherTargetX(tail + j) : tail + j,
+                            value: null
+                        });
+                    }
+                }
+            }
+        });
+
+        // Generate null values for new target
+        if ($$.data.targets.length) {
+            targets.forEach(function (t) {
+                var i,
+                    missing = [];
+                for (i = $$.data.targets[0].values[0].index; i < tail; i++) {
+                    missing.push({
+                        id: t.id,
+                        index: i,
+                        x: $$.isTimeSeries() ? $$.getOtherTargetX(i) : i,
+                        value: null
+                    });
+                }
+                t.values.forEach(function (v) {
+                    v.index += tail;
+                    if (!$$.isTimeSeries()) {
+                        v.x += tail;
+                    }
+                });
+                t.values = missing.concat(t.values);
+            });
+        }
+        $$.data.targets = $$.data.targets.concat(targets); // add remained
+
+        // check data count because behavior needs to change when it's only one
+        dataCount = $$.getMaxDataCount();
+        baseTarget = $$.data.targets[0];
+        baseValue = baseTarget.values[0];
+
+        // Update length to flow if needed
+        if (isDefined(args.to)) {
+            length = 0;
+            to = $$.isTimeSeries() ? $$.parseDate(args.to) : args.to;
+            baseTarget.values.forEach(function (v) {
+                if (v.x < to) {
+                    length++;
+                }
+            });
+        } else if (isDefined(args.length)) {
+            length = args.length;
+        }
+
+        // If only one data, update the domain to flow from left edge of the chart
+        if (!orgDataCount) {
+            if ($$.isTimeSeries()) {
+                if (baseTarget.values.length > 1) {
+                    diff = baseTarget.values[baseTarget.values.length - 1].x - baseValue.x;
+                } else {
+                    diff = baseValue.x - $$.getXDomain($$.data.targets)[0];
+                }
+            } else {
+                diff = 1;
+            }
+            domain = [baseValue.x - diff, baseValue.x];
+            $$.updateXDomain(null, true, true, false, domain);
+        } else if (orgDataCount === 1) {
+            if ($$.isTimeSeries()) {
+                diff = (baseTarget.values[baseTarget.values.length - 1].x - baseValue.x) / 2;
+                domain = [new Date(+baseValue.x - diff), new Date(+baseValue.x + diff)];
+                $$.updateXDomain(null, true, true, false, domain);
+            }
+        }
+
+        // Set targets
+        $$.updateTargets($$.data.targets);
+
+        // Redraw with new targets
+        $$.redraw({
+            flow: {
+                index: baseValue.index,
+                length: length,
+                duration: isValue(args.duration) ? args.duration : $$.config.transition_duration,
+                done: args.done,
+                orgDataCount: orgDataCount
+            },
+            withLegend: true,
+            withTransition: orgDataCount > 1,
+            withTrimXDomain: false,
+            withUpdateXAxis: true
+        });
+    };
+
+    ChartInternal.prototype.generateFlow = function (args) {
+        var $$ = this,
+            config = $$.config,
+            d3 = $$.d3;
+
+        return function () {
+            var targets = args.targets,
+                flow = args.flow,
+                drawBar = args.drawBar,
+                drawLine = args.drawLine,
+                drawArea = args.drawArea,
+                cx = args.cx,
+                cy = args.cy,
+                xv = args.xv,
+                xForText = args.xForText,
+                yForText = args.yForText,
+                duration = args.duration;
+
+            var translateX,
+                scaleX = 1,
+                transform,
+                flowIndex = flow.index,
+                flowLength = flow.length,
+                flowStart = $$.getValueOnIndex($$.data.targets[0].values, flowIndex),
+                flowEnd = $$.getValueOnIndex($$.data.targets[0].values, flowIndex + flowLength),
+                orgDomain = $$.x.domain(),
+                domain,
+                durationForFlow = flow.duration || duration,
+                done = flow.done || function () {},
+                wait = $$.generateWait();
+
+            var xgrid, xgridLines, mainRegion, mainText, mainBar, mainLine, mainArea, mainCircle;
+
+            // set flag
+            $$.flowing = true;
+
+            // remove head data after rendered
+            $$.data.targets.forEach(function (d) {
+                d.values.splice(0, flowLength);
+            });
+
+            // update x domain to generate axis elements for flow
+            domain = $$.updateXDomain(targets, true, true);
+            // update elements related to x scale
+            if ($$.updateXGrid) {
+                $$.updateXGrid(true);
+            }
+
+            xgrid = $$.xgrid || d3.selectAll([]); // xgrid needs to be obtained after updateXGrid
+            xgridLines = $$.xgridLines || d3.selectAll([]);
+            mainRegion = $$.mainRegion || d3.selectAll([]);
+            mainText = $$.mainText || d3.selectAll([]);
+            mainBar = $$.mainBar || d3.selectAll([]);
+            mainLine = $$.mainLine || d3.selectAll([]);
+            mainArea = $$.mainArea || d3.selectAll([]);
+            mainCircle = $$.mainCircle || d3.selectAll([]);
+
+            // generate transform to flow
+            if (!flow.orgDataCount) {
+                // if empty
+                if ($$.data.targets[0].values.length !== 1) {
+                    translateX = $$.x(orgDomain[0]) - $$.x(domain[0]);
+                } else {
+                    if ($$.isTimeSeries()) {
+                        flowStart = $$.getValueOnIndex($$.data.targets[0].values, 0);
+                        flowEnd = $$.getValueOnIndex($$.data.targets[0].values, $$.data.targets[0].values.length - 1);
+                        translateX = $$.x(flowStart.x) - $$.x(flowEnd.x);
+                    } else {
+                        translateX = diffDomain(domain) / 2;
+                    }
+                }
+            } else if (flow.orgDataCount === 1 || (flowStart && flowStart.x) === (flowEnd && flowEnd.x)) {
+                translateX = $$.x(orgDomain[0]) - $$.x(domain[0]);
+            } else {
+                if ($$.isTimeSeries()) {
+                    translateX = $$.x(orgDomain[0]) - $$.x(domain[0]);
+                } else {
+                    translateX = $$.x(flowStart.x) - $$.x(flowEnd.x);
+                }
+            }
+            scaleX = diffDomain(orgDomain) / diffDomain(domain);
+            transform = 'translate(' + translateX + ',0) scale(' + scaleX + ',1)';
+
+            $$.hideXGridFocus();
+
+            var flowTransition = d3.transition().ease(d3.easeLinear).duration(durationForFlow);
+            wait.add($$.xAxis($$.axes.x, flowTransition));
+            wait.add(mainBar.transition(flowTransition).attr('transform', transform));
+            wait.add(mainLine.transition(flowTransition).attr('transform', transform));
+            wait.add(mainArea.transition(flowTransition).attr('transform', transform));
+            wait.add(mainCircle.transition(flowTransition).attr('transform', transform));
+            wait.add(mainText.transition(flowTransition).attr('transform', transform));
+            wait.add(mainRegion.filter($$.isRegionOnX).transition(flowTransition).attr('transform', transform));
+            wait.add(xgrid.transition(flowTransition).attr('transform', transform));
+            wait.add(xgridLines.transition(flowTransition).attr('transform', transform));
+            wait(function () {
+                var i,
+                    shapes = [],
+                    texts = [];
+
+                // remove flowed elements
+                if (flowLength) {
+                    for (i = 0; i < flowLength; i++) {
+                        shapes.push('.' + CLASS.shape + '-' + (flowIndex + i));
+                        texts.push('.' + CLASS.text + '-' + (flowIndex + i));
+                    }
+                    $$.svg.selectAll('.' + CLASS.shapes).selectAll(shapes).remove();
+                    $$.svg.selectAll('.' + CLASS.texts).selectAll(texts).remove();
+                    $$.svg.select('.' + CLASS.xgrid).remove();
+                }
+
+                // draw again for removing flowed elements and reverting attr
+                xgrid.attr('transform', null).attr('x1', $$.xgridAttr.x1).attr('x2', $$.xgridAttr.x2).attr('y1', $$.xgridAttr.y1).attr('y2', $$.xgridAttr.y2).style("opacity", $$.xgridAttr.opacity);
+                xgridLines.attr('transform', null);
+                xgridLines.select('line').attr("x1", config.axis_rotated ? 0 : xv).attr("x2", config.axis_rotated ? $$.width : xv);
+                xgridLines.select('text').attr("x", config.axis_rotated ? $$.width : 0).attr("y", xv);
+                mainBar.attr('transform', null).attr("d", drawBar);
+                mainLine.attr('transform', null).attr("d", drawLine);
+                mainArea.attr('transform', null).attr("d", drawArea);
+                mainCircle.attr('transform', null).attr("cx", cx).attr("cy", cy);
+                mainText.attr('transform', null).attr('x', xForText).attr('y', yForText).style('fill-opacity', $$.opacityForText.bind($$));
+                mainRegion.attr('transform', null);
+                mainRegion.filter($$.isRegionOnX).attr("x", $$.regionX.bind($$)).attr("width", $$.regionWidth.bind($$));
+
+                // callback for end of flow
+                done();
+
+                $$.flowing = false;
+            });
+        };
+    };
+
+    Chart.prototype.focus = function (targetIds) {
+        var $$ = this.internal,
+            candidates;
+
+        targetIds = $$.mapToTargetIds(targetIds);
+        candidates = $$.svg.selectAll($$.selectorTargets(targetIds.filter($$.isTargetToShow, $$))), this.revert();
+        this.defocus();
+        candidates.classed(CLASS.focused, true).classed(CLASS.defocused, false);
+        if ($$.hasArcType()) {
+            $$.expandArc(targetIds);
+        }
+        $$.toggleFocusLegend(targetIds, true);
+
+        $$.focusedTargetIds = targetIds;
+        $$.defocusedTargetIds = $$.defocusedTargetIds.filter(function (id) {
+            return targetIds.indexOf(id) < 0;
+        });
+    };
+
+    Chart.prototype.defocus = function (targetIds) {
+        var $$ = this.internal,
+            candidates;
+
+        targetIds = $$.mapToTargetIds(targetIds);
+        candidates = $$.svg.selectAll($$.selectorTargets(targetIds.filter($$.isTargetToShow, $$))), candidates.classed(CLASS.focused, false).classed(CLASS.defocused, true);
+        if ($$.hasArcType()) {
+            $$.unexpandArc(targetIds);
+        }
+        $$.toggleFocusLegend(targetIds, false);
+
+        $$.focusedTargetIds = $$.focusedTargetIds.filter(function (id) {
+            return targetIds.indexOf(id) < 0;
+        });
+        $$.defocusedTargetIds = targetIds;
+    };
+
+    Chart.prototype.revert = function (targetIds) {
+        var $$ = this.internal,
+            candidates;
+
+        targetIds = $$.mapToTargetIds(targetIds);
+        candidates = $$.svg.selectAll($$.selectorTargets(targetIds)); // should be for all targets
+
+        candidates.classed(CLASS.focused, false).classed(CLASS.defocused, false);
+        if ($$.hasArcType()) {
+            $$.unexpandArc(targetIds);
+        }
+        if ($$.config.legend_show) {
+            $$.showLegend(targetIds.filter($$.isLegendToShow.bind($$)));
+            $$.legend.selectAll($$.selectorLegends(targetIds)).filter(function () {
+                return $$.d3.select(this).classed(CLASS.legendItemFocused);
+            }).classed(CLASS.legendItemFocused, false);
+        }
+
+        $$.focusedTargetIds = [];
+        $$.defocusedTargetIds = [];
+    };
+
+    Chart.prototype.xgrids = function (grids) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!grids) {
+            return config.grid_x_lines;
+        }
+        config.grid_x_lines = grids;
+        $$.redrawWithoutRescale();
+        return config.grid_x_lines;
+    };
+    Chart.prototype.xgrids.add = function (grids) {
+        var $$ = this.internal;
+        return this.xgrids($$.config.grid_x_lines.concat(grids ? grids : []));
+    };
+    Chart.prototype.xgrids.remove = function (params) {
+        // TODO: multiple
+        var $$ = this.internal;
+        $$.removeGridLines(params, true);
+    };
+
+    Chart.prototype.ygrids = function (grids) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!grids) {
+            return config.grid_y_lines;
+        }
+        config.grid_y_lines = grids;
+        $$.redrawWithoutRescale();
+        return config.grid_y_lines;
+    };
+    Chart.prototype.ygrids.add = function (grids) {
+        var $$ = this.internal;
+        return this.ygrids($$.config.grid_y_lines.concat(grids ? grids : []));
+    };
+    Chart.prototype.ygrids.remove = function (params) {
+        // TODO: multiple
+        var $$ = this.internal;
+        $$.removeGridLines(params, false);
+    };
+
+    Chart.prototype.groups = function (groups) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (isUndefined(groups)) {
+            return config.data_groups;
+        }
+        config.data_groups = groups;
+        $$.redraw();
+        return config.data_groups;
+    };
+
+    Chart.prototype.legend = function () {};
+    Chart.prototype.legend.show = function (targetIds) {
+        var $$ = this.internal;
+        $$.showLegend($$.mapToTargetIds(targetIds));
+        $$.updateAndRedraw({ withLegend: true });
+    };
+    Chart.prototype.legend.hide = function (targetIds) {
+        var $$ = this.internal;
+        $$.hideLegend($$.mapToTargetIds(targetIds));
+        $$.updateAndRedraw({ withLegend: false });
+    };
+
+    Chart.prototype.load = function (args) {
+        var $$ = this.internal,
+            config = $$.config;
+        // update xs if specified
+        if (args.xs) {
+            $$.addXs(args.xs);
+        }
+        // update names if exists
+        if ('names' in args) {
+            Chart.prototype.data.names.bind(this)(args.names);
+        }
+        // update classes if exists
+        if ('classes' in args) {
+            Object.keys(args.classes).forEach(function (id) {
+                config.data_classes[id] = args.classes[id];
+            });
+        }
+        // update categories if exists
+        if ('categories' in args && $$.isCategorized()) {
+            config.axis_x_categories = args.categories;
+        }
+        // update axes if exists
+        if ('axes' in args) {
+            Object.keys(args.axes).forEach(function (id) {
+                config.data_axes[id] = args.axes[id];
+            });
+        }
+        // update colors if exists
+        if ('colors' in args) {
+            Object.keys(args.colors).forEach(function (id) {
+                config.data_colors[id] = args.colors[id];
+            });
+        }
+        // use cache if exists
+        if ('cacheIds' in args && $$.hasCaches(args.cacheIds)) {
+            $$.load($$.getCaches(args.cacheIds), args.done);
+            return;
+        }
+        // unload if needed
+        if ('unload' in args) {
+            // TODO: do not unload if target will load (included in url/rows/columns)
+            $$.unload($$.mapToTargetIds(typeof args.unload === 'boolean' && args.unload ? null : args.unload), function () {
+                $$.loadFromArgs(args);
+            });
+        } else {
+            $$.loadFromArgs(args);
+        }
+    };
+
+    Chart.prototype.unload = function (args) {
+        var $$ = this.internal;
+        args = args || {};
+        if (args instanceof Array) {
+            args = { ids: args };
+        } else if (typeof args === 'string') {
+            args = { ids: [args] };
+        }
+        $$.unload($$.mapToTargetIds(args.ids), function () {
+            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
+            if (args.done) {
+                args.done();
+            }
+        });
+    };
+
+    Chart.prototype.regions = function (regions) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!regions) {
+            return config.regions;
+        }
+        config.regions = regions;
+        $$.redrawWithoutRescale();
+        return config.regions;
+    };
+    Chart.prototype.regions.add = function (regions) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!regions) {
+            return config.regions;
+        }
+        config.regions = config.regions.concat(regions);
+        $$.redrawWithoutRescale();
+        return config.regions;
+    };
+    Chart.prototype.regions.remove = function (options) {
+        var $$ = this.internal,
+            config = $$.config,
+            duration,
+            classes,
+            regions;
+
+        options = options || {};
+        duration = $$.getOption(options, "duration", config.transition_duration);
+        classes = $$.getOption(options, "classes", [CLASS.region]);
+
+        regions = $$.main.select('.' + CLASS.regions).selectAll(classes.map(function (c) {
+            return '.' + c;
+        }));
+        (duration ? regions.transition().duration(duration) : regions).style('opacity', 0).remove();
+
+        config.regions = config.regions.filter(function (region) {
+            var found = false;
+            if (!region['class']) {
+                return true;
+            }
+            region['class'].split(' ').forEach(function (c) {
+                if (classes.indexOf(c) >= 0) {
+                    found = true;
+                }
+            });
+            return !found;
+        });
+
+        return config.regions;
+    };
+
+    Chart.prototype.selected = function (targetId) {
+        var $$ = this.internal,
+            d3 = $$.d3;
+        return d3.merge($$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(targetId)).selectAll('.' + CLASS.shape).filter(function () {
+            return d3.select(this).classed(CLASS.SELECTED);
+        }).map(function (d) {
+            return d.map(function (d) {
+                var data = d.__data__;return data.data ? data.data : data;
+            });
+        }));
+    };
+    Chart.prototype.select = function (ids, indices, resetOther) {
+        var $$ = this.internal,
+            d3 = $$.d3,
+            config = $$.config;
+        if (!config.data_selection_enabled) {
+            return;
+        }
+        $$.main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape).each(function (d, i) {
+            var shape = d3.select(this),
+                id = d.data ? d.data.id : d.id,
+                toggle = $$.getToggle(this, d).bind($$),
+                isTargetId = config.data_selection_grouped || !ids || ids.indexOf(id) >= 0,
+                isTargetIndex = !indices || indices.indexOf(i) >= 0,
+                isSelected = shape.classed(CLASS.SELECTED);
+            // line/area selection not supported yet
+            if (shape.classed(CLASS.line) || shape.classed(CLASS.area)) {
+                return;
+            }
+            if (isTargetId && isTargetIndex) {
+                if (config.data_selection_isselectable(d) && !isSelected) {
+                    toggle(true, shape.classed(CLASS.SELECTED, true), d, i);
+                }
+            } else if (isDefined(resetOther) && resetOther) {
+                if (isSelected) {
+                    toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
+                }
+            }
+        });
+    };
+    Chart.prototype.unselect = function (ids, indices) {
+        var $$ = this.internal,
+            d3 = $$.d3,
+            config = $$.config;
+        if (!config.data_selection_enabled) {
+            return;
+        }
+        $$.main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape).each(function (d, i) {
+            var shape = d3.select(this),
+                id = d.data ? d.data.id : d.id,
+                toggle = $$.getToggle(this, d).bind($$),
+                isTargetId = config.data_selection_grouped || !ids || ids.indexOf(id) >= 0,
+                isTargetIndex = !indices || indices.indexOf(i) >= 0,
+                isSelected = shape.classed(CLASS.SELECTED);
+            // line/area selection not supported yet
+            if (shape.classed(CLASS.line) || shape.classed(CLASS.area)) {
+                return;
+            }
+            if (isTargetId && isTargetIndex) {
+                if (config.data_selection_isselectable(d)) {
+                    if (isSelected) {
+                        toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
+                    }
+                }
+            }
+        });
+    };
+
+    Chart.prototype.show = function (targetIds, options) {
+        var $$ = this.internal,
+            targets;
+
+        targetIds = $$.mapToTargetIds(targetIds);
+        options = options || {};
+
+        $$.removeHiddenTargetIds(targetIds);
+        targets = $$.svg.selectAll($$.selectorTargets(targetIds));
+
+        targets.transition().style('display', 'initial', 'important').style('opacity', 1, 'important').call($$.endall, function () {
+            targets.style('opacity', null).style('opacity', 1);
+        });
+
+        if (options.withLegend) {
+            $$.showLegend(targetIds);
+        }
+
+        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
+    };
+
+    Chart.prototype.hide = function (targetIds, options) {
+        var $$ = this.internal,
+            targets;
+
+        targetIds = $$.mapToTargetIds(targetIds);
+        options = options || {};
+
+        $$.addHiddenTargetIds(targetIds);
+        targets = $$.svg.selectAll($$.selectorTargets(targetIds));
+
+        targets.transition().style('opacity', 0, 'important').call($$.endall, function () {
+            targets.style('opacity', null).style('opacity', 0);
+            targets.style('display', 'none');
+        });
+
+        if (options.withLegend) {
+            $$.hideLegend(targetIds);
+        }
+
+        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
+    };
+
+    Chart.prototype.toggle = function (targetIds, options) {
+        var that = this,
+            $$ = this.internal;
+        $$.mapToTargetIds(targetIds).forEach(function (targetId) {
+            $$.isTargetToShow(targetId) ? that.hide(targetId, options) : that.show(targetId, options);
+        });
+    };
+
+    Chart.prototype.tooltip = function () {};
+    Chart.prototype.tooltip.show = function (args) {
+        var $$ = this.internal,
+            targets,
+            data,
+            mouse = {};
+
+        // determine mouse position on the chart
+        if (args.mouse) {
+            mouse = args.mouse;
+        } else {
+            // determine focus data
+            if (args.data) {
+                data = args.data;
+            } else if (typeof args.x !== 'undefined') {
+                if (args.id) {
+                    targets = $$.data.targets.filter(function (t) {
+                        return t.id === args.id;
+                    });
+                } else {
+                    targets = $$.data.targets;
+                }
+                data = $$.filterByX(targets, args.x).slice(0, 1)[0];
+            }
+            mouse = data ? $$.getMousePosition(data) : null;
+        }
+
+        // emulate mouse events to show
+        $$.dispatchEvent('mousemove', mouse);
+
+        $$.config.tooltip_onshow.call($$, data);
+    };
+    Chart.prototype.tooltip.hide = function () {
+        // TODO: get target data by checking the state of focus
+        this.internal.dispatchEvent('mouseout', 0);
+
+        this.internal.config.tooltip_onhide.call(this);
+    };
+
+    Chart.prototype.transform = function (type, targetIds) {
+        var $$ = this.internal,
+            options = ['pie', 'donut'].indexOf(type) >= 0 ? { withTransform: true } : null;
+        $$.transformTo(targetIds, type, options);
+    };
+
+    ChartInternal.prototype.transformTo = function (targetIds, type, optionsForRedraw) {
+        var $$ = this,
+            withTransitionForAxis = !$$.hasArcType(),
+            options = optionsForRedraw || { withTransitionForAxis: withTransitionForAxis };
+        options.withTransitionForTransform = false;
+        $$.transiting = false;
+        $$.setTargetType(targetIds, type);
+        $$.updateTargets($$.data.targets); // this is needed when transforming to arc
+        $$.updateAndRedraw(options);
+    };
+
+    Chart.prototype.x = function (x) {
+        var $$ = this.internal;
+        if (arguments.length) {
+            $$.updateTargetX($$.data.targets, x);
+            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
+        }
+        return $$.data.xs;
+    };
+    Chart.prototype.xs = function (xs) {
+        var $$ = this.internal;
+        if (arguments.length) {
+            $$.updateTargetXs($$.data.targets, xs);
+            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
+        }
+        return $$.data.xs;
+    };
+
+    Chart.prototype.zoom = function (domain) {
+        var $$ = this.internal;
+        if (domain) {
+            if ($$.isTimeSeries()) {
+                domain = domain.map(function (x) {
+                    return $$.parseDate(x);
+                });
+            }
+            if ($$.config.subchart_show) {
+                $$.brush.selectionAsValue(domain, true);
+            } else {
+                $$.updateXDomain(null, true, false, false, domain);
+                $$.redraw({ withY: $$.config.zoom_rescale, withSubchart: false });
+            }
+            $$.config.zoom_onzoom.call(this, $$.x.orgDomain());
+            return domain;
+        } else {
+            return $$.x.domain();
+        }
+    };
+    Chart.prototype.zoom.enable = function (enabled) {
+        var $$ = this.internal;
+        $$.config.zoom_enabled = enabled;
+        $$.updateAndRedraw();
+    };
+    Chart.prototype.unzoom = function () {
+        var $$ = this.internal;
+        if ($$.config.subchart_show) {
+            $$.brush.clear();
+        } else {
+            $$.updateXDomain(null, true, false, false, $$.subX.domain());
+            $$.redraw({ withY: $$.config.zoom_rescale, withSubchart: false });
+        }
+    };
+
+    Chart.prototype.zoom.max = function (max) {
+        var $$ = this.internal,
+            config = $$.config,
+            d3 = $$.d3;
+        if (max === 0 || max) {
+            config.zoom_x_max = d3.max([$$.orgXDomain[1], max]);
+        } else {
+            return config.zoom_x_max;
+        }
+    };
+
+    Chart.prototype.zoom.min = function (min) {
+        var $$ = this.internal,
+            config = $$.config,
+            d3 = $$.d3;
+        if (min === 0 || min) {
+            config.zoom_x_min = d3.min([$$.orgXDomain[0], min]);
+        } else {
+            return config.zoom_x_min;
+        }
+    };
+
+    Chart.prototype.zoom.range = function (range) {
+        if (arguments.length) {
+            if (isDefined(range.max)) {
+                this.domain.max(range.max);
+            }
+            if (isDefined(range.min)) {
+                this.domain.min(range.min);
+            }
+        } else {
+            return {
+                max: this.domain.max(),
+                min: this.domain.min()
+            };
+        }
+    };
+
+    ChartInternal.prototype.initPie = function () {
+        var $$ = this,
+            d3 = $$.d3;
+        $$.pie = d3.pie().value(function (d) {
+            return d.values.reduce(function (a, b) {
+                return a + b.value;
+            }, 0);
+        });
+
+        var orderFct = $$.getOrderFunction();
+
+        // we need to reverse the returned order if asc or desc to have the slice in expected order.
+        if (orderFct && ($$.isOrderAsc() || $$.isOrderDesc())) {
+            var defaultSort = orderFct;
+            orderFct = function orderFct(t1, t2) {
+                return defaultSort(t1, t2) * -1;
+            };
+        }
+
+        $$.pie.sort(orderFct || null);
+    };
+
+    ChartInternal.prototype.updateRadius = function () {
+        var $$ = this,
+            config = $$.config,
+            w = config.gauge_width || config.donut_width,
+            gaugeArcWidth = $$.filterTargetsToShow($$.data.targets).length * $$.config.gauge_arcs_minWidth;
+        $$.radiusExpanded = Math.min($$.arcWidth, $$.arcHeight) / 2 * ($$.hasType('gauge') ? 0.85 : 1);
+        $$.radius = $$.radiusExpanded * 0.95;
+        $$.innerRadiusRatio = w ? ($$.radius - w) / $$.radius : 0.6;
+        $$.innerRadius = $$.hasType('donut') || $$.hasType('gauge') ? $$.radius * $$.innerRadiusRatio : 0;
+        $$.gaugeArcWidth = w ? w : gaugeArcWidth <= $$.radius - $$.innerRadius ? $$.radius - $$.innerRadius : gaugeArcWidth <= $$.radius ? gaugeArcWidth : $$.radius;
+    };
+
+    ChartInternal.prototype.updateArc = function () {
+        var $$ = this;
+        $$.svgArc = $$.getSvgArc();
+        $$.svgArcExpanded = $$.getSvgArcExpanded();
+        $$.svgArcExpandedSub = $$.getSvgArcExpanded(0.98);
+    };
+
+    ChartInternal.prototype.updateAngle = function (d) {
+        var $$ = this,
+            config = $$.config,
+            found = false,
+            index = 0,
+            gMin,
+            gMax,
+            gTic,
+            gValue;
+
+        if (!config) {
+            return null;
+        }
+
+        $$.pie($$.filterTargetsToShow($$.data.targets)).forEach(function (t) {
+            if (!found && t.data.id === d.data.id) {
+                found = true;
+                d = t;
+                d.index = index;
+            }
+            index++;
+        });
+        if (isNaN(d.startAngle)) {
+            d.startAngle = 0;
+        }
+        if (isNaN(d.endAngle)) {
+            d.endAngle = d.startAngle;
+        }
+        if ($$.isGaugeType(d.data)) {
+            gMin = config.gauge_min;
+            gMax = config.gauge_max;
+            gTic = Math.PI * (config.gauge_fullCircle ? 2 : 1) / (gMax - gMin);
+            gValue = d.value < gMin ? 0 : d.value < gMax ? d.value - gMin : gMax - gMin;
+            d.startAngle = config.gauge_startingAngle;
+            d.endAngle = d.startAngle + gTic * gValue;
+        }
+        return found ? d : null;
+    };
+
+    ChartInternal.prototype.getSvgArc = function () {
+        var $$ = this,
+            hasGaugeType = $$.hasType('gauge'),
+            singleArcWidth = $$.gaugeArcWidth / $$.filterTargetsToShow($$.data.targets).length,
+            arc = $$.d3.arc().outerRadius(function (d) {
+            return hasGaugeType ? $$.radius - singleArcWidth * d.index : $$.radius;
+        }).innerRadius(function (d) {
+            return hasGaugeType ? $$.radius - singleArcWidth * (d.index + 1) : $$.innerRadius;
+        }),
+            newArc = function newArc(d, withoutUpdate) {
+            var updated;
+            if (withoutUpdate) {
+                return arc(d);
+            } // for interpolate
+            updated = $$.updateAngle(d);
+            return updated ? arc(updated) : "M 0 0";
+        };
+        // TODO: extends all function
+        newArc.centroid = arc.centroid;
+        return newArc;
+    };
+
+    ChartInternal.prototype.getSvgArcExpanded = function (rate) {
+        rate = rate || 1;
+        var $$ = this,
+            hasGaugeType = $$.hasType('gauge'),
+            singleArcWidth = $$.gaugeArcWidth / $$.filterTargetsToShow($$.data.targets).length,
+            expandWidth = Math.min($$.radiusExpanded * rate - $$.radius, singleArcWidth * 0.8 - (1 - rate) * 100),
+            arc = $$.d3.arc().outerRadius(function (d) {
+            return hasGaugeType ? $$.radius - singleArcWidth * d.index + expandWidth : $$.radiusExpanded * rate;
+        }).innerRadius(function (d) {
+            return hasGaugeType ? $$.radius - singleArcWidth * (d.index + 1) : $$.innerRadius;
+        });
+        return function (d) {
+            var updated = $$.updateAngle(d);
+            return updated ? arc(updated) : "M 0 0";
+        };
+    };
+
+    ChartInternal.prototype.getArc = function (d, withoutUpdate, force) {
+        return force || this.isArcType(d.data) ? this.svgArc(d, withoutUpdate) : "M 0 0";
+    };
+
+    ChartInternal.prototype.transformForArcLabel = function (d) {
+        var $$ = this,
+            config = $$.config,
+            updated = $$.updateAngle(d),
+            c,
+            x,
+            y,
+            h,
+            ratio,
+            translate = "",
+            hasGauge = $$.hasType('gauge');
+        if (updated && !hasGauge) {
+            c = this.svgArc.centroid(updated);
+            x = isNaN(c[0]) ? 0 : c[0];
+            y = isNaN(c[1]) ? 0 : c[1];
+            h = Math.sqrt(x * x + y * y);
+            if ($$.hasType('donut') && config.donut_label_ratio) {
+                ratio = isFunction(config.donut_label_ratio) ? config.donut_label_ratio(d, $$.radius, h) : config.donut_label_ratio;
+            } else if ($$.hasType('pie') && config.pie_label_ratio) {
+                ratio = isFunction(config.pie_label_ratio) ? config.pie_label_ratio(d, $$.radius, h) : config.pie_label_ratio;
+            } else {
+                ratio = $$.radius && h ? (36 / $$.radius > 0.375 ? 1.175 - 36 / $$.radius : 0.8) * $$.radius / h : 0;
+            }
+            translate = "translate(" + x * ratio + ',' + y * ratio + ")";
+        } else if (updated && hasGauge && $$.filterTargetsToShow($$.data.targets).length > 1) {
+            var y1 = Math.sin(updated.endAngle - Math.PI / 2);
+            x = Math.cos(updated.endAngle - Math.PI / 2) * ($$.radiusExpanded + 25);
+            y = y1 * ($$.radiusExpanded + 15 - Math.abs(y1 * 10)) + 3;
+            translate = "translate(" + x + ',' + y + ")";
+        }
+        return translate;
+    };
+
+    ChartInternal.prototype.getArcRatio = function (d) {
+        var $$ = this,
+            config = $$.config,
+            whole = Math.PI * ($$.hasType('gauge') && !config.gauge_fullCircle ? 1 : 2);
+        return d ? (d.endAngle - d.startAngle) / whole : null;
+    };
+
+    ChartInternal.prototype.convertToArcData = function (d) {
+        return this.addName({
+            id: d.data.id,
+            value: d.value,
+            ratio: this.getArcRatio(d),
+            index: d.index
+        });
+    };
+
+    ChartInternal.prototype.textForArcLabel = function (d) {
+        var $$ = this,
+            updated,
+            value,
+            ratio,
+            id,
+            format;
+        if (!$$.shouldShowArcLabel()) {
+            return "";
+        }
+        updated = $$.updateAngle(d);
+        value = updated ? updated.value : null;
+        ratio = $$.getArcRatio(updated);
+        id = d.data.id;
+        if (!$$.hasType('gauge') && !$$.meetsArcLabelThreshold(ratio)) {
+            return "";
+        }
+        format = $$.getArcLabelFormat();
+        return format ? format(value, ratio, id) : $$.defaultArcValueFormat(value, ratio);
+    };
+
+    ChartInternal.prototype.textForGaugeMinMax = function (value, isMax) {
+        var $$ = this,
+            format = $$.getGaugeLabelExtents();
+
+        return format ? format(value, isMax) : value;
+    };
+
+    ChartInternal.prototype.expandArc = function (targetIds) {
+        var $$ = this,
+            interval;
+
+        // MEMO: avoid to cancel transition
+        if ($$.transiting) {
+            interval = window.setInterval(function () {
+                if (!$$.transiting) {
+                    window.clearInterval(interval);
+                    if ($$.legend.selectAll('.c3-legend-item-focused').size() > 0) {
+                        $$.expandArc(targetIds);
+                    }
+                }
+            }, 10);
+            return;
+        }
+
+        targetIds = $$.mapToTargetIds(targetIds);
+
+        $$.svg.selectAll($$.selectorTargets(targetIds, '.' + CLASS.chartArc)).each(function (d) {
+            if (!$$.shouldExpand(d.data.id)) {
+                return;
+            }
+            $$.d3.select(this).selectAll('path').transition().duration($$.expandDuration(d.data.id)).attr("d", $$.svgArcExpanded).transition().duration($$.expandDuration(d.data.id) * 2).attr("d", $$.svgArcExpandedSub).each(function (d) {
+                if ($$.isDonutType(d.data)) ;
+            });
+        });
+    };
+
+    ChartInternal.prototype.unexpandArc = function (targetIds) {
+        var $$ = this;
+
+        if ($$.transiting) {
+            return;
+        }
+
+        targetIds = $$.mapToTargetIds(targetIds);
+
+        $$.svg.selectAll($$.selectorTargets(targetIds, '.' + CLASS.chartArc)).selectAll('path').transition().duration(function (d) {
+            return $$.expandDuration(d.data.id);
+        }).attr("d", $$.svgArc);
+        $$.svg.selectAll('.' + CLASS.arc);
+    };
+
+    ChartInternal.prototype.expandDuration = function (id) {
+        var $$ = this,
+            config = $$.config;
+
+        if ($$.isDonutType(id)) {
+            return config.donut_expand_duration;
+        } else if ($$.isGaugeType(id)) {
+            return config.gauge_expand_duration;
+        } else if ($$.isPieType(id)) {
+            return config.pie_expand_duration;
+        } else {
+            return 50;
+        }
+    };
+
+    ChartInternal.prototype.shouldExpand = function (id) {
+        var $$ = this,
+            config = $$.config;
+        return $$.isDonutType(id) && config.donut_expand || $$.isGaugeType(id) && config.gauge_expand || $$.isPieType(id) && config.pie_expand;
+    };
+
+    ChartInternal.prototype.shouldShowArcLabel = function () {
+        var $$ = this,
+            config = $$.config,
+            shouldShow = true;
+        if ($$.hasType('donut')) {
+            shouldShow = config.donut_label_show;
+        } else if ($$.hasType('pie')) {
+            shouldShow = config.pie_label_show;
+        }
+        // when gauge, always true
+        return shouldShow;
+    };
+
+    ChartInternal.prototype.meetsArcLabelThreshold = function (ratio) {
+        var $$ = this,
+            config = $$.config,
+            threshold = $$.hasType('donut') ? config.donut_label_threshold : config.pie_label_threshold;
+        return ratio >= threshold;
+    };
+
+    ChartInternal.prototype.getArcLabelFormat = function () {
+        var $$ = this,
+            config = $$.config,
+            format = config.pie_label_format;
+        if ($$.hasType('gauge')) {
+            format = config.gauge_label_format;
+        } else if ($$.hasType('donut')) {
+            format = config.donut_label_format;
+        }
+        return format;
+    };
+
+    ChartInternal.prototype.getGaugeLabelExtents = function () {
+        var $$ = this,
+            config = $$.config;
+        return config.gauge_label_extents;
+    };
+
+    ChartInternal.prototype.getArcTitle = function () {
+        var $$ = this;
+        return $$.hasType('donut') ? $$.config.donut_title : "";
+    };
+
+    ChartInternal.prototype.updateTargetsForArc = function (targets) {
+        var $$ = this,
+            main = $$.main,
+            mainPies,
+            mainPieEnter,
+            classChartArc = $$.classChartArc.bind($$),
+            classArcs = $$.classArcs.bind($$),
+            classFocus = $$.classFocus.bind($$);
+        mainPies = main.select('.' + CLASS.chartArcs).selectAll('.' + CLASS.chartArc).data($$.pie(targets)).attr("class", function (d) {
+            return classChartArc(d) + classFocus(d.data);
+        });
+        mainPieEnter = mainPies.enter().append("g").attr("class", classChartArc);
+        mainPieEnter.append('g').attr('class', classArcs);
+        mainPieEnter.append("text").attr("dy", $$.hasType('gauge') ? "-.1em" : ".35em").style("opacity", 0).style("text-anchor", "middle").style("pointer-events", "none");
+        // MEMO: can not keep same color..., but not bad to update color in redraw
+        //mainPieUpdate.exit().remove();
+    };
+
+    ChartInternal.prototype.initArc = function () {
+        var $$ = this;
+        $$.arcs = $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartArcs).attr("transform", $$.getTranslate('arc'));
+        $$.arcs.append('text').attr('class', CLASS.chartArcsTitle).style("text-anchor", "middle").text($$.getArcTitle());
+    };
+
+    ChartInternal.prototype.redrawArc = function (duration, durationForExit, withTransform) {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config,
+            main = $$.main,
+            arcs,
+            mainArc,
+            arcLabelLines,
+            mainArcLabelLine,
+            hasGaugeType = $$.hasType('gauge');
+        arcs = main.selectAll('.' + CLASS.arcs).selectAll('.' + CLASS.arc).data($$.arcData.bind($$));
+        mainArc = arcs.enter().append('path').attr("class", $$.classArc.bind($$)).style("fill", function (d) {
+            return $$.color(d.data);
+        }).style("cursor", function (d) {
+            return config.interaction_enabled && config.data_selection_isselectable(d) ? "pointer" : null;
+        }).each(function (d) {
+            if ($$.isGaugeType(d.data)) {
+                d.startAngle = d.endAngle = config.gauge_startingAngle;
+            }
+            this._current = d;
+        }).merge(arcs);
+        if (hasGaugeType) {
+            arcLabelLines = main.selectAll('.' + CLASS.arcs).selectAll('.' + CLASS.arcLabelLine).data($$.arcData.bind($$));
+            mainArcLabelLine = arcLabelLines.enter().append('rect').attr("class", function (d) {
+                return CLASS.arcLabelLine + ' ' + CLASS.target + ' ' + CLASS.target + '-' + d.data.id;
+            }).merge(arcLabelLines);
+
+            if ($$.filterTargetsToShow($$.data.targets).length === 1) {
+                mainArcLabelLine.style("display", "none");
+            } else {
+                mainArcLabelLine.style("fill", function (d) {
+                    return config.color_pattern.length > 0 ? $$.levelColor(d.data.values[0].value) : $$.color(d.data);
+                }).style("display", config.gauge_labelLine_show ? "" : "none").each(function (d) {
+                    var lineLength = 0,
+                        lineThickness = 2,
+                        x = 0,
+                        y = 0,
+                        transform = "";
+                    if ($$.hiddenTargetIds.indexOf(d.data.id) < 0) {
+                        var updated = $$.updateAngle(d),
+                            innerLineLength = $$.gaugeArcWidth / $$.filterTargetsToShow($$.data.targets).length * (updated.index + 1),
+                            lineAngle = updated.endAngle - Math.PI / 2,
+                            arcInnerRadius = $$.radius - innerLineLength,
+                            linePositioningAngle = lineAngle - (arcInnerRadius === 0 ? 0 : 1 / arcInnerRadius);
+                        lineLength = $$.radiusExpanded - $$.radius + innerLineLength;
+                        x = Math.cos(linePositioningAngle) * arcInnerRadius;
+                        y = Math.sin(linePositioningAngle) * arcInnerRadius;
+                        transform = "rotate(" + lineAngle * 180 / Math.PI + ", " + x + ", " + y + ")";
+                    }
+                    d3.select(this).attr('x', x).attr('y', y).attr('width', lineLength).attr('height', lineThickness).attr('transform', transform).style("stroke-dasharray", "0, " + (lineLength + lineThickness) + ", 0");
+                });
+            }
+        }
+        mainArc.attr("transform", function (d) {
+            return !$$.isGaugeType(d.data) && withTransform ? "scale(0)" : "";
+        }).on('mouseover', config.interaction_enabled ? function (d) {
+            var updated, arcData;
+            if ($$.transiting) {
+                // skip while transiting
+                return;
+            }
+            updated = $$.updateAngle(d);
+            if (updated) {
+                arcData = $$.convertToArcData(updated);
+                // transitions
+                $$.expandArc(updated.data.id);
+                $$.api.focus(updated.data.id);
+                $$.toggleFocusLegend(updated.data.id, true);
+                $$.config.data_onmouseover(arcData, this);
+            }
+        } : null).on('mousemove', config.interaction_enabled ? function (d) {
+            var updated = $$.updateAngle(d),
+                arcData,
+                selectedData;
+            if (updated) {
+                arcData = $$.convertToArcData(updated), selectedData = [arcData];
+                $$.showTooltip(selectedData, this);
+            }
+        } : null).on('mouseout', config.interaction_enabled ? function (d) {
+            var updated, arcData;
+            if ($$.transiting) {
+                // skip while transiting
+                return;
+            }
+            updated = $$.updateAngle(d);
+            if (updated) {
+                arcData = $$.convertToArcData(updated);
+                // transitions
+                $$.unexpandArc(updated.data.id);
+                $$.api.revert();
+                $$.revertLegend();
+                $$.hideTooltip();
+                $$.config.data_onmouseout(arcData, this);
+            }
+        } : null).on('click', config.interaction_enabled ? function (d, i) {
+            var updated = $$.updateAngle(d),
+                arcData;
+            if (updated) {
+                arcData = $$.convertToArcData(updated);
+                if ($$.toggleShape) {
+                    $$.toggleShape(this, arcData, i);
+                }
+                $$.config.data_onclick.call($$.api, arcData, this);
+            }
+        } : null).each(function () {
+            $$.transiting = true;
+        }).transition().duration(duration).attrTween("d", function (d) {
+            var updated = $$.updateAngle(d),
+                interpolate;
+            if (!updated) {
+                return function () {
+                    return "M 0 0";
+                };
+            }
+            //                if (this._current === d) {
+            //                    this._current = {
+            //                        startAngle: Math.PI*2,
+            //                        endAngle: Math.PI*2,
+            //                    };
+            //                }
+            if (isNaN(this._current.startAngle)) {
+                this._current.startAngle = 0;
+            }
+            if (isNaN(this._current.endAngle)) {
+                this._current.endAngle = this._current.startAngle;
+            }
+            interpolate = d3.interpolate(this._current, updated);
+            this._current = interpolate(0);
+            return function (t) {
+                var interpolated = interpolate(t);
+                interpolated.data = d.data; // data.id will be updated by interporator
+                return $$.getArc(interpolated, true);
+            };
+        }).attr("transform", withTransform ? "scale(1)" : "").style("fill", function (d) {
+            return $$.levelColor ? $$.levelColor(d.data.values[0].value) : $$.color(d.data.id);
+        }) // Where gauge reading color would receive customization.
+        .call($$.endall, function () {
+            $$.transiting = false;
+        });
+        arcs.exit().transition().duration(durationForExit).style('opacity', 0).remove();
+        main.selectAll('.' + CLASS.chartArc).select('text').style("opacity", 0).attr('class', function (d) {
+            return $$.isGaugeType(d.data) ? CLASS.gaugeValue : '';
+        }).text($$.textForArcLabel.bind($$)).attr("transform", $$.transformForArcLabel.bind($$)).style('font-size', function (d) {
+            return $$.isGaugeType(d.data) && $$.filterTargetsToShow($$.data.targets).length === 1 ? Math.round($$.radius / 5) + 'px' : '';
+        }).transition().duration(duration).style("opacity", function (d) {
+            return $$.isTargetToShow(d.data.id) && $$.isArcType(d.data) ? 1 : 0;
+        });
+        main.select('.' + CLASS.chartArcsTitle).style("opacity", $$.hasType('donut') || hasGaugeType ? 1 : 0);
+
+        if (hasGaugeType) {
+            var index = 0;
+            var backgroundArc = $$.arcs.select('g.' + CLASS.chartArcsBackground).selectAll('path.' + CLASS.chartArcsBackground).data($$.data.targets);
+
+            backgroundArc.enter().append("path").attr("class", function (d, i) {
+                return CLASS.chartArcsBackground + ' ' + CLASS.chartArcsBackground + '-' + i;
+            }).merge(backgroundArc).attr("d", function (d1) {
+                if ($$.hiddenTargetIds.indexOf(d1.id) >= 0) {
+                    return "M 0 0";
+                }
+
+                var d = {
+                    data: [{ value: config.gauge_max }],
+                    startAngle: config.gauge_startingAngle,
+                    endAngle: -1 * config.gauge_startingAngle * (config.gauge_fullCircle ? Math.PI : 1),
+                    index: index++
+                };
+                return $$.getArc(d, true, true);
+            });
+
+            backgroundArc.exit().remove();
+
+            $$.arcs.select('.' + CLASS.chartArcsGaugeUnit).attr("dy", ".75em").text(config.gauge_label_show ? config.gauge_units : '');
+            $$.arcs.select('.' + CLASS.chartArcsGaugeMin).attr("dx", -1 * ($$.innerRadius + ($$.radius - $$.innerRadius) / (config.gauge_fullCircle ? 1 : 2)) + "px").attr("dy", "1.2em").text(config.gauge_label_show ? $$.textForGaugeMinMax(config.gauge_min, false) : '');
+            $$.arcs.select('.' + CLASS.chartArcsGaugeMax).attr("dx", $$.innerRadius + ($$.radius - $$.innerRadius) / (config.gauge_fullCircle ? 1 : 2) + "px").attr("dy", "1.2em").text(config.gauge_label_show ? $$.textForGaugeMinMax(config.gauge_max, true) : '');
+        }
+    };
+    ChartInternal.prototype.initGauge = function () {
+        var arcs = this.arcs;
+        if (this.hasType('gauge')) {
+            arcs.append('g').attr("class", CLASS.chartArcsBackground);
+            arcs.append("text").attr("class", CLASS.chartArcsGaugeUnit).style("text-anchor", "middle").style("pointer-events", "none");
+            arcs.append("text").attr("class", CLASS.chartArcsGaugeMin).style("text-anchor", "middle").style("pointer-events", "none");
+            arcs.append("text").attr("class", CLASS.chartArcsGaugeMax).style("text-anchor", "middle").style("pointer-events", "none");
+        }
+    };
+    ChartInternal.prototype.getGaugeLabelHeight = function () {
+        return this.config.gauge_label_show ? 20 : 0;
+    };
+
+    ChartInternal.prototype.hasCaches = function (ids) {
+        for (var i = 0; i < ids.length; i++) {
+            if (!(ids[i] in this.cache)) {
+                return false;
+            }
+        }
+        return true;
+    };
+    ChartInternal.prototype.addCache = function (id, target) {
+        this.cache[id] = this.cloneTarget(target);
+    };
+    ChartInternal.prototype.getCaches = function (ids) {
+        var targets = [],
+            i;
+        for (i = 0; i < ids.length; i++) {
+            if (ids[i] in this.cache) {
+                targets.push(this.cloneTarget(this.cache[ids[i]]));
+            }
+        }
+        return targets;
+    };
+
+    ChartInternal.prototype.categoryName = function (i) {
+        var config = this.config;
+        return i < config.axis_x_categories.length ? config.axis_x_categories[i] : i;
+    };
+
+    ChartInternal.prototype.generateTargetClass = function (targetId) {
+        return targetId || targetId === 0 ? ('-' + targetId).replace(/\s/g, '-') : '';
+    };
+    ChartInternal.prototype.generateClass = function (prefix, targetId) {
+        return " " + prefix + " " + prefix + this.generateTargetClass(targetId);
+    };
+    ChartInternal.prototype.classText = function (d) {
+        return this.generateClass(CLASS.text, d.index);
+    };
+    ChartInternal.prototype.classTexts = function (d) {
+        return this.generateClass(CLASS.texts, d.id);
+    };
+    ChartInternal.prototype.classShape = function (d) {
+        return this.generateClass(CLASS.shape, d.index);
+    };
+    ChartInternal.prototype.classShapes = function (d) {
+        return this.generateClass(CLASS.shapes, d.id);
+    };
+    ChartInternal.prototype.classLine = function (d) {
+        return this.classShape(d) + this.generateClass(CLASS.line, d.id);
+    };
+    ChartInternal.prototype.classLines = function (d) {
+        return this.classShapes(d) + this.generateClass(CLASS.lines, d.id);
+    };
+    ChartInternal.prototype.classCircle = function (d) {
+        return this.classShape(d) + this.generateClass(CLASS.circle, d.index);
+    };
+    ChartInternal.prototype.classCircles = function (d) {
+        return this.classShapes(d) + this.generateClass(CLASS.circles, d.id);
+    };
+    ChartInternal.prototype.classBar = function (d) {
+        return this.classShape(d) + this.generateClass(CLASS.bar, d.index);
+    };
+    ChartInternal.prototype.classBars = function (d) {
+        return this.classShapes(d) + this.generateClass(CLASS.bars, d.id);
+    };
+    ChartInternal.prototype.classArc = function (d) {
+        return this.classShape(d.data) + this.generateClass(CLASS.arc, d.data.id);
+    };
+    ChartInternal.prototype.classArcs = function (d) {
+        return this.classShapes(d.data) + this.generateClass(CLASS.arcs, d.data.id);
+    };
+    ChartInternal.prototype.classArea = function (d) {
+        return this.classShape(d) + this.generateClass(CLASS.area, d.id);
+    };
+    ChartInternal.prototype.classAreas = function (d) {
+        return this.classShapes(d) + this.generateClass(CLASS.areas, d.id);
+    };
+    ChartInternal.prototype.classRegion = function (d, i) {
+        return this.generateClass(CLASS.region, i) + ' ' + ('class' in d ? d['class'] : '');
+    };
+    ChartInternal.prototype.classEvent = function (d) {
+        return this.generateClass(CLASS.eventRect, d.index);
+    };
+    ChartInternal.prototype.classTarget = function (id) {
+        var $$ = this;
+        var additionalClassSuffix = $$.config.data_classes[id],
+            additionalClass = '';
+        if (additionalClassSuffix) {
+            additionalClass = ' ' + CLASS.target + '-' + additionalClassSuffix;
+        }
+        return $$.generateClass(CLASS.target, id) + additionalClass;
+    };
+    ChartInternal.prototype.classFocus = function (d) {
+        return this.classFocused(d) + this.classDefocused(d);
+    };
+    ChartInternal.prototype.classFocused = function (d) {
+        return ' ' + (this.focusedTargetIds.indexOf(d.id) >= 0 ? CLASS.focused : '');
+    };
+    ChartInternal.prototype.classDefocused = function (d) {
+        return ' ' + (this.defocusedTargetIds.indexOf(d.id) >= 0 ? CLASS.defocused : '');
+    };
+    ChartInternal.prototype.classChartText = function (d) {
+        return CLASS.chartText + this.classTarget(d.id);
+    };
+    ChartInternal.prototype.classChartLine = function (d) {
+        return CLASS.chartLine + this.classTarget(d.id);
+    };
+    ChartInternal.prototype.classChartBar = function (d) {
+        return CLASS.chartBar + this.classTarget(d.id);
+    };
+    ChartInternal.prototype.classChartArc = function (d) {
+        return CLASS.chartArc + this.classTarget(d.data.id);
+    };
+    ChartInternal.prototype.getTargetSelectorSuffix = function (targetId) {
+        return this.generateTargetClass(targetId).replace(/([?!@#$%^&*()_=+,.<>'":;\[\]\/|~`{}\\])/g, '\\$1');
+    };
+    ChartInternal.prototype.selectorTarget = function (id, prefix) {
+        return (prefix || '') + '.' + CLASS.target + this.getTargetSelectorSuffix(id);
+    };
+    ChartInternal.prototype.selectorTargets = function (ids, prefix) {
+        var $$ = this;
+        ids = ids || [];
+        return ids.length ? ids.map(function (id) {
+            return $$.selectorTarget(id, prefix);
+        }) : null;
+    };
+    ChartInternal.prototype.selectorLegend = function (id) {
+        return '.' + CLASS.legendItem + this.getTargetSelectorSuffix(id);
+    };
+    ChartInternal.prototype.selectorLegends = function (ids) {
+        var $$ = this;
+        return ids && ids.length ? ids.map(function (id) {
+            return $$.selectorLegend(id);
+        }) : null;
+    };
+
+    ChartInternal.prototype.getClipPath = function (id) {
+        var isIE9 = window.navigator.appVersion.toLowerCase().indexOf("msie 9.") >= 0;
+        return "url(" + (isIE9 ? "" : document.URL.split('#')[0]) + "#" + id + ")";
+    };
+    ChartInternal.prototype.appendClip = function (parent, id) {
+        return parent.append("clipPath").attr("id", id).append("rect");
+    };
+    ChartInternal.prototype.getAxisClipX = function (forHorizontal) {
+        // axis line width + padding for left
+        var left = Math.max(30, this.margin.left);
+        return forHorizontal ? -(1 + left) : -(left - 1);
+    };
+    ChartInternal.prototype.getAxisClipY = function (forHorizontal) {
+        return forHorizontal ? -20 : -this.margin.top;
+    };
+    ChartInternal.prototype.getXAxisClipX = function () {
+        var $$ = this;
+        return $$.getAxisClipX(!$$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getXAxisClipY = function () {
+        var $$ = this;
+        return $$.getAxisClipY(!$$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getYAxisClipX = function () {
+        var $$ = this;
+        return $$.config.axis_y_inner ? -1 : $$.getAxisClipX($$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getYAxisClipY = function () {
+        var $$ = this;
+        return $$.getAxisClipY($$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getAxisClipWidth = function (forHorizontal) {
+        var $$ = this,
+            left = Math.max(30, $$.margin.left),
+            right = Math.max(30, $$.margin.right);
+        // width + axis line width + padding for left/right
+        return forHorizontal ? $$.width + 2 + left + right : $$.margin.left + 20;
+    };
+    ChartInternal.prototype.getAxisClipHeight = function (forHorizontal) {
+        // less than 20 is not enough to show the axis label 'outer' without legend
+        return (forHorizontal ? this.margin.bottom : this.margin.top + this.height) + 20;
+    };
+    ChartInternal.prototype.getXAxisClipWidth = function () {
+        var $$ = this;
+        return $$.getAxisClipWidth(!$$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getXAxisClipHeight = function () {
+        var $$ = this;
+        return $$.getAxisClipHeight(!$$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getYAxisClipWidth = function () {
+        var $$ = this;
+        return $$.getAxisClipWidth($$.config.axis_rotated) + ($$.config.axis_y_inner ? 20 : 0);
+    };
+    ChartInternal.prototype.getYAxisClipHeight = function () {
+        var $$ = this;
+        return $$.getAxisClipHeight($$.config.axis_rotated);
+    };
+
+    ChartInternal.prototype.generateColor = function () {
+        var $$ = this,
+            config = $$.config,
+            d3 = $$.d3,
+            colors = config.data_colors,
+            pattern = notEmpty(config.color_pattern) ? config.color_pattern : d3.schemeCategory10,
+            callback = config.data_color,
+            ids = [];
+
+        return function (d) {
+            var id = d.id || d.data && d.data.id || d,
+                color;
+
+            // if callback function is provided
+            if (colors[id] instanceof Function) {
+                color = colors[id](d);
+            }
+            // if specified, choose that color
+            else if (colors[id]) {
+                    color = colors[id];
+                }
+                // if not specified, choose from pattern
+                else {
+                        if (ids.indexOf(id) < 0) {
+                            ids.push(id);
+                        }
+                        color = pattern[ids.indexOf(id) % pattern.length];
+                        colors[id] = color;
+                    }
+            return callback instanceof Function ? callback(color, d) : color;
+        };
+    };
+    ChartInternal.prototype.generateLevelColor = function () {
+        var $$ = this,
+            config = $$.config,
+            colors = config.color_pattern,
+            threshold = config.color_threshold,
+            asValue = threshold.unit === 'value',
+            values = threshold.values && threshold.values.length ? threshold.values : [],
+            max = threshold.max || 100;
+        return notEmpty(config.color_threshold) ? function (value) {
+            var i,
+                v,
+                color = colors[colors.length - 1];
+            for (i = 0; i < values.length; i++) {
+                v = asValue ? value : value * 100 / max;
+                if (v < values[i]) {
+                    color = colors[i];
+                    break;
+                }
+            }
+            return color;
+        } : null;
+    };
+
+    ChartInternal.prototype.getDefaultConfig = function () {
+        var config = {
+            bindto: '#chart',
+            svg_classname: undefined,
+            size_width: undefined,
+            size_height: undefined,
+            padding_left: undefined,
+            padding_right: undefined,
+            padding_top: undefined,
+            padding_bottom: undefined,
+            resize_auto: true,
+            zoom_enabled: false,
+            zoom_initialRange: undefined,
+            zoom_type: 'scroll',
+            zoom_disableDefaultBehavior: false,
+            zoom_privileged: false,
+            zoom_rescale: false,
+            zoom_onzoom: function zoom_onzoom() {},
+            zoom_onzoomstart: function zoom_onzoomstart() {},
+            zoom_onzoomend: function zoom_onzoomend() {},
+            zoom_x_min: undefined,
+            zoom_x_max: undefined,
+            interaction_brighten: true,
+            interaction_enabled: true,
+            onmouseover: function onmouseover() {},
+            onmouseout: function onmouseout() {},
+            onresize: function onresize() {},
+            onresized: function onresized() {},
+            oninit: function oninit() {},
+            onrendered: function onrendered() {},
+            transition_duration: 350,
+            data_x: undefined,
+            data_xs: {},
+            data_xFormat: '%Y-%m-%d',
+            data_xLocaltime: true,
+            data_xSort: true,
+            data_idConverter: function data_idConverter(id) {
+                return id;
+            },
+            data_names: {},
+            data_classes: {},
+            data_groups: [],
+            data_axes: {},
+            data_type: undefined,
+            data_types: {},
+            data_labels: {},
+            data_order: 'desc',
+            data_regions: {},
+            data_color: undefined,
+            data_colors: {},
+            data_hide: false,
+            data_filter: undefined,
+            data_selection_enabled: false,
+            data_selection_grouped: false,
+            data_selection_isselectable: function data_selection_isselectable() {
+                return true;
+            },
+            data_selection_multiple: true,
+            data_selection_draggable: false,
+            data_onclick: function data_onclick() {},
+            data_onmouseover: function data_onmouseover() {},
+            data_onmouseout: function data_onmouseout() {},
+            data_onselected: function data_onselected() {},
+            data_onunselected: function data_onunselected() {},
+            data_url: undefined,
+            data_headers: undefined,
+            data_json: undefined,
+            data_rows: undefined,
+            data_columns: undefined,
+            data_mimeType: undefined,
+            data_keys: undefined,
+            // configuration for no plot-able data supplied.
+            data_empty_label_text: "",
+            // subchart
+            subchart_show: false,
+            subchart_size_height: 60,
+            subchart_axis_x_show: true,
+            subchart_onbrush: function subchart_onbrush() {},
+            // color
+            color_pattern: [],
+            color_threshold: {},
+            // legend
+            legend_show: true,
+            legend_hide: false,
+            legend_position: 'bottom',
+            legend_inset_anchor: 'top-left',
+            legend_inset_x: 10,
+            legend_inset_y: 0,
+            legend_inset_step: undefined,
+            legend_item_onclick: undefined,
+            legend_item_onmouseover: undefined,
+            legend_item_onmouseout: undefined,
+            legend_equally: false,
+            legend_padding: 0,
+            legend_item_tile_width: 10,
+            legend_item_tile_height: 10,
+            // axis
+            axis_rotated: false,
+            axis_x_show: true,
+            axis_x_type: 'indexed',
+            axis_x_localtime: true,
+            axis_x_categories: [],
+            axis_x_tick_centered: false,
+            axis_x_tick_format: undefined,
+            axis_x_tick_culling: {},
+            axis_x_tick_culling_max: 10,
+            axis_x_tick_count: undefined,
+            axis_x_tick_fit: true,
+            axis_x_tick_values: null,
+            axis_x_tick_rotate: 0,
+            axis_x_tick_outer: true,
+            axis_x_tick_multiline: true,
+            axis_x_tick_multilineMax: 0,
+            axis_x_tick_width: null,
+            axis_x_max: undefined,
+            axis_x_min: undefined,
+            axis_x_padding: {},
+            axis_x_height: undefined,
+            axis_x_selection: undefined,
+            axis_x_label: {},
+            axis_x_inner: undefined,
+            axis_y_show: true,
+            axis_y_type: undefined,
+            axis_y_max: undefined,
+            axis_y_min: undefined,
+            axis_y_inverted: false,
+            axis_y_center: undefined,
+            axis_y_inner: undefined,
+            axis_y_label: {},
+            axis_y_tick_format: undefined,
+            axis_y_tick_outer: true,
+            axis_y_tick_values: null,
+            axis_y_tick_rotate: 0,
+            axis_y_tick_count: undefined,
+            axis_y_tick_time_type: undefined,
+            axis_y_tick_time_interval: undefined,
+            axis_y_padding: {},
+            axis_y_default: undefined,
+            axis_y2_show: false,
+            axis_y2_max: undefined,
+            axis_y2_min: undefined,
+            axis_y2_inverted: false,
+            axis_y2_center: undefined,
+            axis_y2_inner: undefined,
+            axis_y2_label: {},
+            axis_y2_tick_format: undefined,
+            axis_y2_tick_outer: true,
+            axis_y2_tick_values: null,
+            axis_y2_tick_count: undefined,
+            axis_y2_padding: {},
+            axis_y2_default: undefined,
+            // grid
+            grid_x_show: false,
+            grid_x_type: 'tick',
+            grid_x_lines: [],
+            grid_y_show: false,
+            // not used
+            // grid_y_type: 'tick',
+            grid_y_lines: [],
+            grid_y_ticks: 10,
+            grid_focus_show: true,
+            grid_lines_front: true,
+            // point - point of each data
+            point_show: true,
+            point_r: 2.5,
+            point_sensitivity: 10,
+            point_focus_expand_enabled: true,
+            point_focus_expand_r: undefined,
+            point_select_r: undefined,
+            // line
+            line_connectNull: false,
+            line_step_type: 'step',
+            // bar
+            bar_width: undefined,
+            bar_width_ratio: 0.6,
+            bar_width_max: undefined,
+            bar_zerobased: true,
+            bar_space: 0,
+            // area
+            area_zerobased: true,
+            area_above: false,
+            // pie
+            pie_label_show: true,
+            pie_label_format: undefined,
+            pie_label_threshold: 0.05,
+            pie_label_ratio: undefined,
+            pie_expand: {},
+            pie_expand_duration: 50,
+            // gauge
+            gauge_fullCircle: false,
+            gauge_label_show: true,
+            gauge_labelLine_show: true,
+            gauge_label_format: undefined,
+            gauge_min: 0,
+            gauge_max: 100,
+            gauge_startingAngle: -1 * Math.PI / 2,
+            gauge_label_extents: undefined,
+            gauge_units: undefined,
+            gauge_width: undefined,
+            gauge_arcs_minWidth: 5,
+            gauge_expand: {},
+            gauge_expand_duration: 50,
+            // donut
+            donut_label_show: true,
+            donut_label_format: undefined,
+            donut_label_threshold: 0.05,
+            donut_label_ratio: undefined,
+            donut_width: undefined,
+            donut_title: "",
+            donut_expand: {},
+            donut_expand_duration: 50,
+            // spline
+            spline_interpolation_type: 'cardinal',
+            // region - region to change style
+            regions: [],
+            // tooltip - show when mouseover on each data
+            tooltip_show: true,
+            tooltip_grouped: true,
+            tooltip_order: undefined,
+            tooltip_format_title: undefined,
+            tooltip_format_name: undefined,
+            tooltip_format_value: undefined,
+            tooltip_position: undefined,
+            tooltip_contents: function tooltip_contents(d, defaultTitleFormat, defaultValueFormat, color) {
+                return this.getTooltipContent ? this.getTooltipContent(d, defaultTitleFormat, defaultValueFormat, color) : '';
+            },
+            tooltip_init_show: false,
+            tooltip_init_x: 0,
+            tooltip_init_position: { top: '0px', left: '50px' },
+            tooltip_onshow: function tooltip_onshow() {},
+            tooltip_onhide: function tooltip_onhide() {},
+            // title
+            title_text: undefined,
+            title_padding: {
+                top: 0,
+                right: 0,
+                bottom: 0,
+                left: 0
+            },
+            title_position: 'top-center'
+        };
+
+        Object.keys(this.additionalConfig).forEach(function (key) {
+            config[key] = this.additionalConfig[key];
+        }, this);
+
+        return config;
+    };
+    ChartInternal.prototype.additionalConfig = {};
+
+    ChartInternal.prototype.loadConfig = function (config) {
+        var this_config = this.config,
+            target,
+            keys,
+            read;
+        function find() {
+            var key = keys.shift();
+            //        console.log("key =>", key, ", target =>", target);
+            if (key && target && (typeof target === 'undefined' ? 'undefined' : _typeof(target)) === 'object' && key in target) {
+                target = target[key];
+                return find();
+            } else if (!key) {
+                return target;
+            } else {
+                return undefined;
+            }
+        }
+        Object.keys(this_config).forEach(function (key) {
+            target = config;
+            keys = key.split('_');
+            read = find();
+            //        console.log("CONFIG : ", key, read);
+            if (isDefined(read)) {
+                this_config[key] = read;
+            }
+        });
+    };
+
+    ChartInternal.prototype.convertUrlToData = function (url, mimeType, headers, keys, done) {
+        var $$ = this,
+            type = mimeType ? mimeType : 'csv',
+            f,
+            converter;
+
+        if (type === 'json') {
+            f = $$.d3.json;
+            converter = $$.convertJsonToData;
+        } else if (type === 'tsv') {
+            f = $$.d3.tsv;
+            converter = $$.convertXsvToData;
+        } else {
+            f = $$.d3.csv;
+            converter = $$.convertXsvToData;
+        }
+
+        f(url, headers).then(function (data) {
+            done.call($$, converter.call($$, data, keys));
+        }).catch(function (error) {
+            throw error;
+        });
+    };
+    ChartInternal.prototype.convertXsvToData = function (xsv) {
+        var keys = xsv.columns,
+            rows = xsv;
+        if (rows.length === 0) {
+            return { keys: keys, rows: [keys.reduce(function (row, key) {
+                    return Object.assign(row, defineProperty({}, key, null));
+                }, {})] };
+        } else {
+            // [].concat() is to convert result into a plain array otherwise
+            // test is not happy because rows have properties.
+            return { keys: keys, rows: [].concat(xsv) };
+        }
+    };
+    ChartInternal.prototype.convertJsonToData = function (json, keys) {
+        var $$ = this,
+            new_rows = [],
+            targetKeys,
+            data;
+        if (keys) {
+            // when keys specified, json would be an array that includes objects
+            if (keys.x) {
+                targetKeys = keys.value.concat(keys.x);
+                $$.config.data_x = keys.x;
+            } else {
+                targetKeys = keys.value;
+            }
+            new_rows.push(targetKeys);
+            json.forEach(function (o) {
+                var new_row = [];
+                targetKeys.forEach(function (key) {
+                    // convert undefined to null because undefined data will be removed in convertDataToTargets()
+                    var v = $$.findValueInJson(o, key);
+                    if (isUndefined(v)) {
+                        v = null;
+                    }
+                    new_row.push(v);
+                });
+                new_rows.push(new_row);
+            });
+            data = $$.convertRowsToData(new_rows);
+        } else {
+            Object.keys(json).forEach(function (key) {
+                new_rows.push([key].concat(json[key]));
+            });
+            data = $$.convertColumnsToData(new_rows);
+        }
+        return data;
+    };
+    ChartInternal.prototype.findValueInJson = function (object, path) {
+        path = path.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties (replace [] with .)
+        path = path.replace(/^\./, ''); // strip a leading dot
+        var pathArray = path.split('.');
+        for (var i = 0; i < pathArray.length; ++i) {
+            var k = pathArray[i];
+            if (k in object) {
+                object = object[k];
+            } else {
+                return;
+            }
+        }
+        return object;
+    };
+
+    /**
+     * Converts the rows to normalized data.
+     * @param {any[][]} rows The row data
+     * @return {Object}
+     */
+    ChartInternal.prototype.convertRowsToData = function (rows) {
+        var newRows = [];
+        var keys = rows[0];
+
+        for (var i = 1; i < rows.length; i++) {
+            var newRow = {};
+            for (var j = 0; j < rows[i].length; j++) {
+                if (isUndefined(rows[i][j])) {
+                    throw new Error("Source data is missing a component at (" + i + "," + j + ")!");
+                }
+                newRow[keys[j]] = rows[i][j];
+            }
+            newRows.push(newRow);
+        }
+        return { keys: keys, rows: newRows };
+    };
+
+    /**
+     * Converts the columns to normalized data.
+     * @param {any[][]} columns The column data
+     * @return {Object}
+     */
+    ChartInternal.prototype.convertColumnsToData = function (columns) {
+        var newRows = [];
+        var keys = [];
+
+        for (var i = 0; i < columns.length; i++) {
+            var key = columns[i][0];
+            for (var j = 1; j < columns[i].length; j++) {
+                if (isUndefined(newRows[j - 1])) {
+                    newRows[j - 1] = {};
+                }
+                if (isUndefined(columns[i][j])) {
+                    throw new Error("Source data is missing a component at (" + i + "," + j + ")!");
+                }
+                newRows[j - 1][key] = columns[i][j];
+            }
+            keys.push(key);
+        }
+
+        return { keys: keys, rows: newRows };
+    };
+
+    /**
+     * Converts the data format into the target format.
+     * @param {!Object} data
+     * @param {!Array} data.keys Ordered list of target IDs.
+     * @param {!Array} data.rows Rows of data to convert.
+     * @param {boolean} appendXs True to append to $$.data.xs, False to replace.
+     * @return {!Array}
+     */
+    ChartInternal.prototype.convertDataToTargets = function (data, appendXs) {
+        var $$ = this,
+            config = $$.config,
+            targets,
+            ids,
+            xs,
+            keys;
+
+        // handles format where keys are not orderly provided
+        if (isArray(data)) {
+            keys = Object.keys(data[0]);
+        } else {
+            keys = data.keys;
+            data = data.rows;
+        }
+
+        ids = keys.filter($$.isNotX, $$);
+        xs = keys.filter($$.isX, $$);
+
+        // save x for update data by load when custom x and c3.x API
+        ids.forEach(function (id) {
+            var xKey = $$.getXKey(id);
+
+            if ($$.isCustomX() || $$.isTimeSeries()) {
+                // if included in input data
+                if (xs.indexOf(xKey) >= 0) {
+                    $$.data.xs[id] = (appendXs && $$.data.xs[id] ? $$.data.xs[id] : []).concat(data.map(function (d) {
+                        return d[xKey];
+                    }).filter(isValue).map(function (rawX, i) {
+                        return $$.generateTargetX(rawX, id, i);
+                    }));
+                }
+                // if not included in input data, find from preloaded data of other id's x
+                else if (config.data_x) {
+                        $$.data.xs[id] = $$.getOtherTargetXs();
+                    }
+                    // if not included in input data, find from preloaded data
+                    else if (notEmpty(config.data_xs)) {
+                            $$.data.xs[id] = $$.getXValuesOfXKey(xKey, $$.data.targets);
+                        }
+                // MEMO: if no x included, use same x of current will be used
+            } else {
+                $$.data.xs[id] = data.map(function (d, i) {
+                    return i;
+                });
+            }
+        });
+
+        // check x is defined
+        ids.forEach(function (id) {
+            if (!$$.data.xs[id]) {
+                throw new Error('x is not defined for id = "' + id + '".');
+            }
+        });
+
+        // convert to target
+        targets = ids.map(function (id, index) {
+            var convertedId = config.data_idConverter(id);
+            return {
+                id: convertedId,
+                id_org: id,
+                values: data.map(function (d, i) {
+                    var xKey = $$.getXKey(id),
+                        rawX = d[xKey],
+                        value = d[id] !== null && !isNaN(d[id]) ? +d[id] : null,
+                        x;
+                    // use x as categories if custom x and categorized
+                    if ($$.isCustomX() && $$.isCategorized() && !isUndefined(rawX)) {
+                        if (index === 0 && i === 0) {
+                            config.axis_x_categories = [];
+                        }
+                        x = config.axis_x_categories.indexOf(rawX);
+                        if (x === -1) {
+                            x = config.axis_x_categories.length;
+                            config.axis_x_categories.push(rawX);
+                        }
+                    } else {
+                        x = $$.generateTargetX(rawX, id, i);
+                    }
+                    // mark as x = undefined if value is undefined and filter to remove after mapped
+                    if (isUndefined(d[id]) || $$.data.xs[id].length <= i) {
+                        x = undefined;
+                    }
+                    return { x: x, value: value, id: convertedId };
+                }).filter(function (v) {
+                    return isDefined(v.x);
+                })
+            };
+        });
+
+        // finish targets
+        targets.forEach(function (t) {
+            var i;
+            // sort values by its x
+            if (config.data_xSort) {
+                t.values = t.values.sort(function (v1, v2) {
+                    var x1 = v1.x || v1.x === 0 ? v1.x : Infinity,
+                        x2 = v2.x || v2.x === 0 ? v2.x : Infinity;
+                    return x1 - x2;
+                });
+            }
+            // indexing each value
+            i = 0;
+            t.values.forEach(function (v) {
+                v.index = i++;
+            });
+            // this needs to be sorted because its index and value.index is identical
+            $$.data.xs[t.id].sort(function (v1, v2) {
+                return v1 - v2;
+            });
+        });
+
+        // cache information about values
+        $$.hasNegativeValue = $$.hasNegativeValueInTargets(targets);
+        $$.hasPositiveValue = $$.hasPositiveValueInTargets(targets);
+
+        // set target types
+        if (config.data_type) {
+            $$.setTargetType($$.mapToIds(targets).filter(function (id) {
+                return !(id in config.data_types);
+            }), config.data_type);
+        }
+
+        // cache as original id keyed
+        targets.forEach(function (d) {
+            $$.addCache(d.id_org, d);
+        });
+
+        return targets;
+    };
+
+    ChartInternal.prototype.isX = function (key) {
+        var $$ = this,
+            config = $$.config;
+        return config.data_x && key === config.data_x || notEmpty(config.data_xs) && hasValue(config.data_xs, key);
+    };
+    ChartInternal.prototype.isNotX = function (key) {
+        return !this.isX(key);
+    };
+    ChartInternal.prototype.getXKey = function (id) {
+        var $$ = this,
+            config = $$.config;
+        return config.data_x ? config.data_x : notEmpty(config.data_xs) ? config.data_xs[id] : null;
+    };
+    ChartInternal.prototype.getXValuesOfXKey = function (key, targets) {
+        var $$ = this,
+            xValues,
+            ids = targets && notEmpty(targets) ? $$.mapToIds(targets) : [];
+        ids.forEach(function (id) {
+            if ($$.getXKey(id) === key) {
+                xValues = $$.data.xs[id];
+            }
+        });
+        return xValues;
+    };
+    ChartInternal.prototype.getXValue = function (id, i) {
+        var $$ = this;
+        return id in $$.data.xs && $$.data.xs[id] && isValue($$.data.xs[id][i]) ? $$.data.xs[id][i] : i;
+    };
+    ChartInternal.prototype.getOtherTargetXs = function () {
+        var $$ = this,
+            idsForX = Object.keys($$.data.xs);
+        return idsForX.length ? $$.data.xs[idsForX[0]] : null;
+    };
+    ChartInternal.prototype.getOtherTargetX = function (index) {
+        var xs = this.getOtherTargetXs();
+        return xs && index < xs.length ? xs[index] : null;
+    };
+    ChartInternal.prototype.addXs = function (xs) {
+        var $$ = this;
+        Object.keys(xs).forEach(function (id) {
+            $$.config.data_xs[id] = xs[id];
+        });
+    };
+    ChartInternal.prototype.addName = function (data) {
+        var $$ = this,
+            name;
+        if (data) {
+            name = $$.config.data_names[data.id];
+            data.name = name !== undefined ? name : data.id;
+        }
+        return data;
+    };
+    ChartInternal.prototype.getValueOnIndex = function (values, index) {
+        var valueOnIndex = values.filter(function (v) {
+            return v.index === index;
+        });
+        return valueOnIndex.length ? valueOnIndex[0] : null;
+    };
+    ChartInternal.prototype.updateTargetX = function (targets, x) {
+        var $$ = this;
+        targets.forEach(function (t) {
+            t.values.forEach(function (v, i) {
+                v.x = $$.generateTargetX(x[i], t.id, i);
+            });
+            $$.data.xs[t.id] = x;
+        });
+    };
+    ChartInternal.prototype.updateTargetXs = function (targets, xs) {
+        var $$ = this;
+        targets.forEach(function (t) {
+            if (xs[t.id]) {
+                $$.updateTargetX([t], xs[t.id]);
+            }
+        });
+    };
+    ChartInternal.prototype.generateTargetX = function (rawX, id, index) {
+        var $$ = this,
+            x;
+        if ($$.isTimeSeries()) {
+            x = rawX ? $$.parseDate(rawX) : $$.parseDate($$.getXValue(id, index));
+        } else if ($$.isCustomX() && !$$.isCategorized()) {
+            x = isValue(rawX) ? +rawX : $$.getXValue(id, index);
+        } else {
+            x = index;
+        }
+        return x;
+    };
+    ChartInternal.prototype.cloneTarget = function (target) {
+        return {
+            id: target.id,
+            id_org: target.id_org,
+            values: target.values.map(function (d) {
+                return {
+                    x: d.x,
+                    value: d.value,
+                    id: d.id
+                };
+            })
+        };
+    };
+    ChartInternal.prototype.getMaxDataCount = function () {
+        var $$ = this;
+        return $$.d3.max($$.data.targets, function (t) {
+            return t.values.length;
+        });
+    };
+    ChartInternal.prototype.mapToIds = function (targets) {
+        return targets.map(function (d) {
+            return d.id;
+        });
+    };
+    ChartInternal.prototype.mapToTargetIds = function (ids) {
+        var $$ = this;
+        return ids ? [].concat(ids) : $$.mapToIds($$.data.targets);
+    };
+    ChartInternal.prototype.hasTarget = function (targets, id) {
+        var ids = this.mapToIds(targets),
+            i;
+        for (i = 0; i < ids.length; i++) {
+            if (ids[i] === id) {
+                return true;
+            }
+        }
+        return false;
+    };
+    ChartInternal.prototype.isTargetToShow = function (targetId) {
+        return this.hiddenTargetIds.indexOf(targetId) < 0;
+    };
+    ChartInternal.prototype.isLegendToShow = function (targetId) {
+        return this.hiddenLegendIds.indexOf(targetId) < 0;
+    };
+    ChartInternal.prototype.filterTargetsToShow = function (targets) {
+        var $$ = this;
+        return targets.filter(function (t) {
+            return $$.isTargetToShow(t.id);
+        });
+    };
+    ChartInternal.prototype.mapTargetsToUniqueXs = function (targets) {
+        var $$ = this;
+        var xs = $$.d3.set($$.d3.merge(targets.map(function (t) {
+            return t.values.map(function (v) {
+                return +v.x;
+            });
+        }))).values();
+        xs = $$.isTimeSeries() ? xs.map(function (x) {
+            return new Date(+x);
+        }) : xs.map(function (x) {
+            return +x;
+        });
+        return xs.sort(function (a, b) {
+            return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+        });
+    };
+    ChartInternal.prototype.addHiddenTargetIds = function (targetIds) {
+        targetIds = targetIds instanceof Array ? targetIds : new Array(targetIds);
+        for (var i = 0; i < targetIds.length; i++) {
+            if (this.hiddenTargetIds.indexOf(targetIds[i]) < 0) {
+                this.hiddenTargetIds = this.hiddenTargetIds.concat(targetIds[i]);
+            }
+        }
+    };
+    ChartInternal.prototype.removeHiddenTargetIds = function (targetIds) {
+        this.hiddenTargetIds = this.hiddenTargetIds.filter(function (id) {
+            return targetIds.indexOf(id) < 0;
+        });
+    };
+    ChartInternal.prototype.addHiddenLegendIds = function (targetIds) {
+        targetIds = targetIds instanceof Array ? targetIds : new Array(targetIds);
+        for (var i = 0; i < targetIds.length; i++) {
+            if (this.hiddenLegendIds.indexOf(targetIds[i]) < 0) {
+                this.hiddenLegendIds = this.hiddenLegendIds.concat(targetIds[i]);
+            }
+        }
+    };
+    ChartInternal.prototype.removeHiddenLegendIds = function (targetIds) {
+        this.hiddenLegendIds = this.hiddenLegendIds.filter(function (id) {
+            return targetIds.indexOf(id) < 0;
+        });
+    };
+    ChartInternal.prototype.getValuesAsIdKeyed = function (targets) {
+        var ys = {};
+        targets.forEach(function (t) {
+            ys[t.id] = [];
+            t.values.forEach(function (v) {
+                ys[t.id].push(v.value);
+            });
+        });
+        return ys;
+    };
+    ChartInternal.prototype.checkValueInTargets = function (targets, checker) {
+        var ids = Object.keys(targets),
+            i,
+            j,
+            values;
+        for (i = 0; i < ids.length; i++) {
+            values = targets[ids[i]].values;
+            for (j = 0; j < values.length; j++) {
+                if (checker(values[j].value)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    };
+    ChartInternal.prototype.hasNegativeValueInTargets = function (targets) {
+        return this.checkValueInTargets(targets, function (v) {
+            return v < 0;
+        });
+    };
+    ChartInternal.prototype.hasPositiveValueInTargets = function (targets) {
+        return this.checkValueInTargets(targets, function (v) {
+            return v > 0;
+        });
+    };
+    ChartInternal.prototype.isOrderDesc = function () {
+        var config = this.config;
+        return typeof config.data_order === 'string' && config.data_order.toLowerCase() === 'desc';
+    };
+    ChartInternal.prototype.isOrderAsc = function () {
+        var config = this.config;
+        return typeof config.data_order === 'string' && config.data_order.toLowerCase() === 'asc';
+    };
+    ChartInternal.prototype.getOrderFunction = function () {
+        var $$ = this,
+            config = $$.config,
+            orderAsc = $$.isOrderAsc(),
+            orderDesc = $$.isOrderDesc();
+        if (orderAsc || orderDesc) {
+            var reducer = function reducer(p, c) {
+                return p + Math.abs(c.value);
+            };
+            return function (t1, t2) {
+                var t1Sum = t1.values.reduce(reducer, 0),
+                    t2Sum = t2.values.reduce(reducer, 0);
+                return orderAsc ? t2Sum - t1Sum : t1Sum - t2Sum;
+            };
+        } else if (isFunction(config.data_order)) {
+            return config.data_order;
+        } else if (isArray(config.data_order)) {
+            var order = config.data_order;
+            return function (t1, t2) {
+                return order.indexOf(t1.id) - order.indexOf(t2.id);
+            };
+        }
+    };
+    ChartInternal.prototype.orderTargets = function (targets) {
+        var fct = this.getOrderFunction();
+        if (fct) {
+            targets.sort(fct);
+        }
+        return targets;
+    };
+    ChartInternal.prototype.filterByX = function (targets, x) {
+        return this.d3.merge(targets.map(function (t) {
+            return t.values;
+        })).filter(function (v) {
+            return v.x - x === 0;
+        });
+    };
+    ChartInternal.prototype.filterRemoveNull = function (data) {
+        return data.filter(function (d) {
+            return isValue(d.value);
+        });
+    };
+    ChartInternal.prototype.filterByXDomain = function (targets, xDomain) {
+        return targets.map(function (t) {
+            return {
+                id: t.id,
+                id_org: t.id_org,
+                values: t.values.filter(function (v) {
+                    return xDomain[0] <= v.x && v.x <= xDomain[1];
+                })
+            };
+        });
+    };
+    ChartInternal.prototype.hasDataLabel = function () {
+        var config = this.config;
+        if (typeof config.data_labels === 'boolean' && config.data_labels) {
+            return true;
+        } else if (_typeof(config.data_labels) === 'object' && notEmpty(config.data_labels)) {
+            return true;
+        }
+        return false;
+    };
+    ChartInternal.prototype.getDataLabelLength = function (min, max, key) {
+        var $$ = this,
+            lengths = [0, 0],
+            paddingCoef = 1.3;
+        $$.selectChart.select('svg').selectAll('.dummy').data([min, max]).enter().append('text').text(function (d) {
+            return $$.dataLabelFormat(d.id)(d);
+        }).each(function (d, i) {
+            lengths[i] = this.getBoundingClientRect()[key] * paddingCoef;
+        }).remove();
+        return lengths;
+    };
+    ChartInternal.prototype.isNoneArc = function (d) {
+        return this.hasTarget(this.data.targets, d.id);
+    }, ChartInternal.prototype.isArc = function (d) {
+        return 'data' in d && this.hasTarget(this.data.targets, d.data.id);
+    };
+    ChartInternal.prototype.findClosestFromTargets = function (targets, pos) {
+        var $$ = this,
+            candidates;
+
+        // map to array of closest points of each target
+        candidates = targets.map(function (target) {
+            return $$.findClosest(target.values, pos);
+        });
+
+        // decide closest point and return
+        return $$.findClosest(candidates, pos);
+    };
+    ChartInternal.prototype.findClosest = function (values, pos) {
+        var $$ = this,
+            minDist = $$.config.point_sensitivity,
+            closest;
+
+        // find mouseovering bar
+        values.filter(function (v) {
+            return v && $$.isBarType(v.id);
+        }).forEach(function (v) {
+            var shape = $$.main.select('.' + CLASS.bars + $$.getTargetSelectorSuffix(v.id) + ' .' + CLASS.bar + '-' + v.index).node();
+            if (!closest && $$.isWithinBar($$.d3.mouse(shape), shape)) {
+                closest = v;
+            }
+        });
+
+        // find closest point from non-bar
+        values.filter(function (v) {
+            return v && !$$.isBarType(v.id);
+        }).forEach(function (v) {
+            var d = $$.dist(v, pos);
+            if (d < minDist) {
+                minDist = d;
+                closest = v;
+            }
+        });
+
+        return closest;
+    };
+    ChartInternal.prototype.dist = function (data, pos) {
+        var $$ = this,
+            config = $$.config,
+            xIndex = config.axis_rotated ? 1 : 0,
+            yIndex = config.axis_rotated ? 0 : 1,
+            y = $$.circleY(data, data.index),
+            x = $$.x(data.x);
+        return Math.sqrt(Math.pow(x - pos[xIndex], 2) + Math.pow(y - pos[yIndex], 2));
+    };
+    ChartInternal.prototype.convertValuesToStep = function (values) {
+        var converted = [].concat(values),
+            i;
+
+        if (!this.isCategorized()) {
+            return values;
+        }
+
+        for (i = values.length + 1; 0 < i; i--) {
+            converted[i] = converted[i - 1];
+        }
+
+        converted[0] = {
+            x: converted[0].x - 1,
+            value: converted[0].value,
+            id: converted[0].id
+        };
+        converted[values.length + 1] = {
+            x: converted[values.length].x + 1,
+            value: converted[values.length].value,
+            id: converted[values.length].id
+        };
+
+        return converted;
+    };
+    ChartInternal.prototype.updateDataAttributes = function (name, attrs) {
+        var $$ = this,
+            config = $$.config,
+            current = config['data_' + name];
+        if (typeof attrs === 'undefined') {
+            return current;
+        }
+        Object.keys(attrs).forEach(function (id) {
+            current[id] = attrs[id];
+        });
+        $$.redraw({
+            withLegend: true
+        });
+        return current;
+    };
+
+    ChartInternal.prototype.load = function (targets, args) {
+        var $$ = this;
+        if (targets) {
+            // filter loading targets if needed
+            if (args.filter) {
+                targets = targets.filter(args.filter);
+            }
+            // set type if args.types || args.type specified
+            if (args.type || args.types) {
+                targets.forEach(function (t) {
+                    var type = args.types && args.types[t.id] ? args.types[t.id] : args.type;
+                    $$.setTargetType(t.id, type);
+                });
+            }
+            // Update/Add data
+            $$.data.targets.forEach(function (d) {
+                for (var i = 0; i < targets.length; i++) {
+                    if (d.id === targets[i].id) {
+                        d.values = targets[i].values;
+                        targets.splice(i, 1);
+                        break;
+                    }
+                }
+            });
+            $$.data.targets = $$.data.targets.concat(targets); // add remained
+        }
+
+        // Set targets
+        $$.updateTargets($$.data.targets);
+
+        // Redraw with new targets
+        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
+
+        if (args.done) {
+            args.done();
+        }
+    };
+    ChartInternal.prototype.loadFromArgs = function (args) {
+        var $$ = this;
+        if (args.data) {
+            $$.load($$.convertDataToTargets(args.data), args);
+        } else if (args.url) {
+            $$.convertUrlToData(args.url, args.mimeType, args.headers, args.keys, function (data) {
+                $$.load($$.convertDataToTargets(data), args);
+            });
+        } else if (args.json) {
+            $$.load($$.convertDataToTargets($$.convertJsonToData(args.json, args.keys)), args);
+        } else if (args.rows) {
+            $$.load($$.convertDataToTargets($$.convertRowsToData(args.rows)), args);
+        } else if (args.columns) {
+            $$.load($$.convertDataToTargets($$.convertColumnsToData(args.columns)), args);
+        } else {
+            $$.load(null, args);
+        }
+    };
+    ChartInternal.prototype.unload = function (targetIds, done) {
+        var $$ = this;
+        if (!done) {
+            done = function done() {};
+        }
+        // filter existing target
+        targetIds = targetIds.filter(function (id) {
+            return $$.hasTarget($$.data.targets, id);
+        });
+        // If no target, call done and return
+        if (!targetIds || targetIds.length === 0) {
+            done();
+            return;
+        }
+        $$.svg.selectAll(targetIds.map(function (id) {
+            return $$.selectorTarget(id);
+        })).transition().style('opacity', 0).remove().call($$.endall, done);
+        targetIds.forEach(function (id) {
+            // Reset fadein for future load
+            $$.withoutFadeIn[id] = false;
+            // Remove target's elements
+            if ($$.legend) {
+                $$.legend.selectAll('.' + CLASS.legendItem + $$.getTargetSelectorSuffix(id)).remove();
+            }
+            // Remove target
+            $$.data.targets = $$.data.targets.filter(function (t) {
+                return t.id !== id;
+            });
+        });
+    };
+
+    ChartInternal.prototype.getYDomainMin = function (targets) {
+        var $$ = this,
+            config = $$.config,
+            ids = $$.mapToIds(targets),
+            ys = $$.getValuesAsIdKeyed(targets),
+            j,
+            k,
+            baseId,
+            idsInGroup,
+            id,
+            hasNegativeValue;
+        if (config.data_groups.length > 0) {
+            hasNegativeValue = $$.hasNegativeValueInTargets(targets);
+            for (j = 0; j < config.data_groups.length; j++) {
+                // Determine baseId
+                idsInGroup = config.data_groups[j].filter(function (id) {
+                    return ids.indexOf(id) >= 0;
+                });
+                if (idsInGroup.length === 0) {
+                    continue;
+                }
+                baseId = idsInGroup[0];
+                // Consider negative values
+                if (hasNegativeValue && ys[baseId]) {
+                    ys[baseId].forEach(function (v, i) {
+                        ys[baseId][i] = v < 0 ? v : 0;
+                    });
+                }
+                // Compute min
+                for (k = 1; k < idsInGroup.length; k++) {
+                    id = idsInGroup[k];
+                    if (!ys[id]) {
+                        continue;
+                    }
+                    ys[id].forEach(function (v, i) {
+                        if ($$.axis.getId(id) === $$.axis.getId(baseId) && ys[baseId] && !(hasNegativeValue && +v > 0)) {
+                            ys[baseId][i] += +v;
+                        }
+                    });
+                }
+            }
+        }
+        return $$.d3.min(Object.keys(ys).map(function (key) {
+            return $$.d3.min(ys[key]);
+        }));
+    };
+    ChartInternal.prototype.getYDomainMax = function (targets) {
+        var $$ = this,
+            config = $$.config,
+            ids = $$.mapToIds(targets),
+            ys = $$.getValuesAsIdKeyed(targets),
+            j,
+            k,
+            baseId,
+            idsInGroup,
+            id,
+            hasPositiveValue;
+        if (config.data_groups.length > 0) {
+            hasPositiveValue = $$.hasPositiveValueInTargets(targets);
+            for (j = 0; j < config.data_groups.length; j++) {
+                // Determine baseId
+                idsInGroup = config.data_groups[j].filter(function (id) {
+                    return ids.indexOf(id) >= 0;
+                });
+                if (idsInGroup.length === 0) {
+                    continue;
+                }
+                baseId = idsInGroup[0];
+                // Consider positive values
+                if (hasPositiveValue && ys[baseId]) {
+                    ys[baseId].forEach(function (v, i) {
+                        ys[baseId][i] = v > 0 ? v : 0;
+                    });
+                }
+                // Compute max
+                for (k = 1; k < idsInGroup.length; k++) {
+                    id = idsInGroup[k];
+                    if (!ys[id]) {
+                        continue;
+                    }
+                    ys[id].forEach(function (v, i) {
+                        if ($$.axis.getId(id) === $$.axis.getId(baseId) && ys[baseId] && !(hasPositiveValue && +v < 0)) {
+                            ys[baseId][i] += +v;
+                        }
+                    });
+                }
+            }
+        }
+        return $$.d3.max(Object.keys(ys).map(function (key) {
+            return $$.d3.max(ys[key]);
+        }));
+    };
+    ChartInternal.prototype.getYDomain = function (targets, axisId, xDomain) {
+        var $$ = this,
+            config = $$.config,
+            targetsByAxisId = targets.filter(function (t) {
+            return $$.axis.getId(t.id) === axisId;
+        }),
+            yTargets = xDomain ? $$.filterByXDomain(targetsByAxisId, xDomain) : targetsByAxisId,
+            yMin = axisId === 'y2' ? config.axis_y2_min : config.axis_y_min,
+            yMax = axisId === 'y2' ? config.axis_y2_max : config.axis_y_max,
+            yDomainMin = $$.getYDomainMin(yTargets),
+            yDomainMax = $$.getYDomainMax(yTargets),
+            domain,
+            domainLength,
+            padding,
+            padding_top,
+            padding_bottom,
+            center = axisId === 'y2' ? config.axis_y2_center : config.axis_y_center,
+            yDomainAbs,
+            lengths,
+            diff,
+            ratio,
+            isAllPositive,
+            isAllNegative,
+            isZeroBased = $$.hasType('bar', yTargets) && config.bar_zerobased || $$.hasType('area', yTargets) && config.area_zerobased,
+            isInverted = axisId === 'y2' ? config.axis_y2_inverted : config.axis_y_inverted,
+            showHorizontalDataLabel = $$.hasDataLabel() && config.axis_rotated,
+            showVerticalDataLabel = $$.hasDataLabel() && !config.axis_rotated;
+
+        // MEMO: avoid inverting domain unexpectedly
+        yDomainMin = isValue(yMin) ? yMin : isValue(yMax) ? yDomainMin < yMax ? yDomainMin : yMax - 10 : yDomainMin;
+        yDomainMax = isValue(yMax) ? yMax : isValue(yMin) ? yMin < yDomainMax ? yDomainMax : yMin + 10 : yDomainMax;
+
+        if (yTargets.length === 0) {
+            // use current domain if target of axisId is none
+            return axisId === 'y2' ? $$.y2.domain() : $$.y.domain();
+        }
+        if (isNaN(yDomainMin)) {
+            // set minimum to zero when not number
+            yDomainMin = 0;
+        }
+        if (isNaN(yDomainMax)) {
+            // set maximum to have same value as yDomainMin
+            yDomainMax = yDomainMin;
+        }
+        if (yDomainMin === yDomainMax) {
+            yDomainMin < 0 ? yDomainMax = 0 : yDomainMin = 0;
+        }
+        isAllPositive = yDomainMin >= 0 && yDomainMax >= 0;
+        isAllNegative = yDomainMin <= 0 && yDomainMax <= 0;
+
+        // Cancel zerobased if axis_*_min / axis_*_max specified
+        if (isValue(yMin) && isAllPositive || isValue(yMax) && isAllNegative) {
+            isZeroBased = false;
+        }
+
+        // Bar/Area chart should be 0-based if all positive|negative
+        if (isZeroBased) {
+            if (isAllPositive) {
+                yDomainMin = 0;
+            }
+            if (isAllNegative) {
+                yDomainMax = 0;
+            }
+        }
+
+        domainLength = Math.abs(yDomainMax - yDomainMin);
+        padding = padding_top = padding_bottom = domainLength * 0.1;
+
+        if (typeof center !== 'undefined') {
+            yDomainAbs = Math.max(Math.abs(yDomainMin), Math.abs(yDomainMax));
+            yDomainMax = center + yDomainAbs;
+            yDomainMin = center - yDomainAbs;
+        }
+        // add padding for data label
+        if (showHorizontalDataLabel) {
+            lengths = $$.getDataLabelLength(yDomainMin, yDomainMax, 'width');
+            diff = diffDomain($$.y.range());
+            ratio = [lengths[0] / diff, lengths[1] / diff];
+            padding_top += domainLength * (ratio[1] / (1 - ratio[0] - ratio[1]));
+            padding_bottom += domainLength * (ratio[0] / (1 - ratio[0] - ratio[1]));
+        } else if (showVerticalDataLabel) {
+            lengths = $$.getDataLabelLength(yDomainMin, yDomainMax, 'height');
+            padding_top += $$.axis.convertPixelsToAxisPadding(lengths[1], domainLength);
+            padding_bottom += $$.axis.convertPixelsToAxisPadding(lengths[0], domainLength);
+        }
+        if (axisId === 'y' && notEmpty(config.axis_y_padding)) {
+            padding_top = $$.axis.getPadding(config.axis_y_padding, 'top', padding_top, domainLength);
+            padding_bottom = $$.axis.getPadding(config.axis_y_padding, 'bottom', padding_bottom, domainLength);
+        }
+        if (axisId === 'y2' && notEmpty(config.axis_y2_padding)) {
+            padding_top = $$.axis.getPadding(config.axis_y2_padding, 'top', padding_top, domainLength);
+            padding_bottom = $$.axis.getPadding(config.axis_y2_padding, 'bottom', padding_bottom, domainLength);
+        }
+        // Bar/Area chart should be 0-based if all positive|negative
+        if (isZeroBased) {
+            if (isAllPositive) {
+                padding_bottom = yDomainMin;
+            }
+            if (isAllNegative) {
+                padding_top = -yDomainMax;
+            }
+        }
+        domain = [yDomainMin - padding_bottom, yDomainMax + padding_top];
+        return isInverted ? domain.reverse() : domain;
+    };
+    ChartInternal.prototype.getXDomainMin = function (targets) {
+        var $$ = this,
+            config = $$.config;
+        return isDefined(config.axis_x_min) ? $$.isTimeSeries() ? this.parseDate(config.axis_x_min) : config.axis_x_min : $$.d3.min(targets, function (t) {
+            return $$.d3.min(t.values, function (v) {
+                return v.x;
+            });
+        });
+    };
+    ChartInternal.prototype.getXDomainMax = function (targets) {
+        var $$ = this,
+            config = $$.config;
+        return isDefined(config.axis_x_max) ? $$.isTimeSeries() ? this.parseDate(config.axis_x_max) : config.axis_x_max : $$.d3.max(targets, function (t) {
+            return $$.d3.max(t.values, function (v) {
+                return v.x;
+            });
+        });
+    };
+    ChartInternal.prototype.getXDomainPadding = function (domain) {
+        var $$ = this,
+            config = $$.config,
+            diff = domain[1] - domain[0],
+            maxDataCount,
+            padding,
+            paddingLeft,
+            paddingRight;
+        if ($$.isCategorized()) {
+            padding = 0;
+        } else if ($$.hasType('bar')) {
+            maxDataCount = $$.getMaxDataCount();
+            padding = maxDataCount > 1 ? diff / (maxDataCount - 1) / 2 : 0.5;
+        } else {
+            padding = diff * 0.01;
+        }
+        if (_typeof(config.axis_x_padding) === 'object' && notEmpty(config.axis_x_padding)) {
+            paddingLeft = isValue(config.axis_x_padding.left) ? config.axis_x_padding.left : padding;
+            paddingRight = isValue(config.axis_x_padding.right) ? config.axis_x_padding.right : padding;
+        } else if (typeof config.axis_x_padding === 'number') {
+            paddingLeft = paddingRight = config.axis_x_padding;
+        } else {
+            paddingLeft = paddingRight = padding;
+        }
+        return { left: paddingLeft, right: paddingRight };
+    };
+    ChartInternal.prototype.getXDomain = function (targets) {
+        var $$ = this,
+            xDomain = [$$.getXDomainMin(targets), $$.getXDomainMax(targets)],
+            firstX = xDomain[0],
+            lastX = xDomain[1],
+            padding = $$.getXDomainPadding(xDomain),
+            min = 0,
+            max = 0;
+        // show center of x domain if min and max are the same
+        if (firstX - lastX === 0 && !$$.isCategorized()) {
+            if ($$.isTimeSeries()) {
+                firstX = new Date(firstX.getTime() * 0.5);
+                lastX = new Date(lastX.getTime() * 1.5);
+            } else {
+                firstX = firstX === 0 ? 1 : firstX * 0.5;
+                lastX = lastX === 0 ? -1 : lastX * 1.5;
+            }
+        }
+        if (firstX || firstX === 0) {
+            min = $$.isTimeSeries() ? new Date(firstX.getTime() - padding.left) : firstX - padding.left;
+        }
+        if (lastX || lastX === 0) {
+            max = $$.isTimeSeries() ? new Date(lastX.getTime() + padding.right) : lastX + padding.right;
+        }
+        return [min, max];
+    };
+    ChartInternal.prototype.updateXDomain = function (targets, withUpdateXDomain, withUpdateOrgXDomain, withTrim, domain) {
+        var $$ = this,
+            config = $$.config;
+
+        if (withUpdateOrgXDomain) {
+            $$.x.domain(domain ? domain : $$.d3.extent($$.getXDomain(targets)));
+            $$.orgXDomain = $$.x.domain();
+            if (config.zoom_enabled) {
+                $$.zoom.update();
+            }
+            $$.subX.domain($$.x.domain());
+            if ($$.brush) {
+                $$.brush.updateScale($$.subX);
+            }
+        }
+        if (withUpdateXDomain) {
+            $$.x.domain(domain ? domain : !$$.brush || $$.brush.empty() ? $$.orgXDomain : $$.brush.selectionAsValue());
+        }
+
+        // Trim domain when too big by zoom mousemove event
+        if (withTrim) {
+            $$.x.domain($$.trimXDomain($$.x.orgDomain()));
+        }
+
+        return $$.x.domain();
+    };
+    ChartInternal.prototype.trimXDomain = function (domain) {
+        var zoomDomain = this.getZoomDomain(),
+            min = zoomDomain[0],
+            max = zoomDomain[1];
+        if (domain[0] <= min) {
+            domain[1] = +domain[1] + (min - domain[0]);
+            domain[0] = min;
+        }
+        if (max <= domain[1]) {
+            domain[0] = +domain[0] - (domain[1] - max);
+            domain[1] = max;
+        }
+        return domain;
+    };
+
+    ChartInternal.prototype.drag = function (mouse) {
+        var $$ = this,
+            config = $$.config,
+            main = $$.main,
+            d3 = $$.d3;
+        var sx, sy, mx, my, minX, maxX, minY, maxY;
+
+        if ($$.hasArcType()) {
+            return;
+        }
+        if (!config.data_selection_enabled) {
+            return;
+        } // do nothing if not selectable
+        if (!config.data_selection_multiple) {
+            return;
+        } // skip when single selection because drag is used for multiple selection
+
+        sx = $$.dragStart[0];
+        sy = $$.dragStart[1];
+        mx = mouse[0];
+        my = mouse[1];
+        minX = Math.min(sx, mx);
+        maxX = Math.max(sx, mx);
+        minY = config.data_selection_grouped ? $$.margin.top : Math.min(sy, my);
+        maxY = config.data_selection_grouped ? $$.height : Math.max(sy, my);
+
+        main.select('.' + CLASS.dragarea).attr('x', minX).attr('y', minY).attr('width', maxX - minX).attr('height', maxY - minY);
+        // TODO: binary search when multiple xs
+        main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape).filter(function (d) {
+            return config.data_selection_isselectable(d);
+        }).each(function (d, i) {
+            var shape = d3.select(this),
+                isSelected = shape.classed(CLASS.SELECTED),
+                isIncluded = shape.classed(CLASS.INCLUDED),
+                _x,
+                _y,
+                _w,
+                _h,
+                toggle,
+                isWithin = false,
+                box;
+            if (shape.classed(CLASS.circle)) {
+                _x = shape.attr("cx") * 1;
+                _y = shape.attr("cy") * 1;
+                toggle = $$.togglePoint;
+                isWithin = minX < _x && _x < maxX && minY < _y && _y < maxY;
+            } else if (shape.classed(CLASS.bar)) {
+                box = getPathBox(this);
+                _x = box.x;
+                _y = box.y;
+                _w = box.width;
+                _h = box.height;
+                toggle = $$.togglePath;
+                isWithin = !(maxX < _x || _x + _w < minX) && !(maxY < _y || _y + _h < minY);
+            } else {
+                // line/area selection not supported yet
+                return;
+            }
+            if (isWithin ^ isIncluded) {
+                shape.classed(CLASS.INCLUDED, !isIncluded);
+                // TODO: included/unincluded callback here
+                shape.classed(CLASS.SELECTED, !isSelected);
+                toggle.call($$, !isSelected, shape, d, i);
+            }
+        });
+    };
+
+    ChartInternal.prototype.dragstart = function (mouse) {
+        var $$ = this,
+            config = $$.config;
+        if ($$.hasArcType()) {
+            return;
+        }
+        if (!config.data_selection_enabled) {
+            return;
+        } // do nothing if not selectable
+        $$.dragStart = mouse;
+        $$.main.select('.' + CLASS.chart).append('rect').attr('class', CLASS.dragarea).style('opacity', 0.1);
+        $$.dragging = true;
+    };
+
+    ChartInternal.prototype.dragend = function () {
+        var $$ = this,
+            config = $$.config;
+        if ($$.hasArcType()) {
+            return;
+        }
+        if (!config.data_selection_enabled) {
+            return;
+        } // do nothing if not selectable
+        $$.main.select('.' + CLASS.dragarea).transition().duration(100).style('opacity', 0).remove();
+        $$.main.selectAll('.' + CLASS.shape).classed(CLASS.INCLUDED, false);
+        $$.dragging = false;
+    };
+
+    ChartInternal.prototype.getYFormat = function (forArc) {
+        var $$ = this,
+            formatForY = forArc && !$$.hasType('gauge') ? $$.defaultArcValueFormat : $$.yFormat,
+            formatForY2 = forArc && !$$.hasType('gauge') ? $$.defaultArcValueFormat : $$.y2Format;
+        return function (v, ratio, id) {
+            var format = $$.axis.getId(id) === 'y2' ? formatForY2 : formatForY;
+            return format.call($$, v, ratio);
+        };
+    };
+    ChartInternal.prototype.yFormat = function (v) {
+        var $$ = this,
+            config = $$.config,
+            format = config.axis_y_tick_format ? config.axis_y_tick_format : $$.defaultValueFormat;
+        return format(v);
+    };
+    ChartInternal.prototype.y2Format = function (v) {
+        var $$ = this,
+            config = $$.config,
+            format = config.axis_y2_tick_format ? config.axis_y2_tick_format : $$.defaultValueFormat;
+        return format(v);
+    };
+    ChartInternal.prototype.defaultValueFormat = function (v) {
+        return isValue(v) ? +v : "";
+    };
+    ChartInternal.prototype.defaultArcValueFormat = function (v, ratio) {
+        return (ratio * 100).toFixed(1) + '%';
+    };
+    ChartInternal.prototype.dataLabelFormat = function (targetId) {
+        var $$ = this,
+            data_labels = $$.config.data_labels,
+            format,
+            defaultFormat = function defaultFormat(v) {
+            return isValue(v) ? +v : "";
+        };
+        // find format according to axis id
+        if (typeof data_labels.format === 'function') {
+            format = data_labels.format;
+        } else if (_typeof(data_labels.format) === 'object') {
+            if (data_labels.format[targetId]) {
+                format = data_labels.format[targetId] === true ? defaultFormat : data_labels.format[targetId];
+            } else {
+                format = function format() {
+                    return '';
+                };
+            }
+        } else {
+            format = defaultFormat;
+        }
+        return format;
+    };
+
+    ChartInternal.prototype.initGrid = function () {
+        var $$ = this,
+            config = $$.config,
+            d3 = $$.d3;
+        $$.grid = $$.main.append('g').attr("clip-path", $$.clipPathForGrid).attr('class', CLASS.grid);
+        if (config.grid_x_show) {
+            $$.grid.append("g").attr("class", CLASS.xgrids);
+        }
+        if (config.grid_y_show) {
+            $$.grid.append('g').attr('class', CLASS.ygrids);
+        }
+        if (config.grid_focus_show) {
+            $$.grid.append('g').attr("class", CLASS.xgridFocus).append('line').attr('class', CLASS.xgridFocus);
+        }
+        $$.xgrid = d3.selectAll([]);
+        if (!config.grid_lines_front) {
+            $$.initGridLines();
+        }
+    };
+    ChartInternal.prototype.initGridLines = function () {
+        var $$ = this,
+            d3 = $$.d3;
+        $$.gridLines = $$.main.append('g').attr("clip-path", $$.clipPathForGrid).attr('class', CLASS.grid + ' ' + CLASS.gridLines);
+        $$.gridLines.append('g').attr("class", CLASS.xgridLines);
+        $$.gridLines.append('g').attr('class', CLASS.ygridLines);
+        $$.xgridLines = d3.selectAll([]);
+    };
+    ChartInternal.prototype.updateXGrid = function (withoutUpdate) {
+        var $$ = this,
+            config = $$.config,
+            d3 = $$.d3,
+            xgridData = $$.generateGridData(config.grid_x_type, $$.x),
+            tickOffset = $$.isCategorized() ? $$.xAxis.tickOffset() : 0;
+
+        $$.xgridAttr = config.axis_rotated ? {
+            'x1': 0,
+            'x2': $$.width,
+            'y1': function y1(d) {
+                return $$.x(d) - tickOffset;
+            },
+            'y2': function y2(d) {
+                return $$.x(d) - tickOffset;
+            }
+        } : {
+            'x1': function x1(d) {
+                return $$.x(d) + tickOffset;
+            },
+            'x2': function x2(d) {
+                return $$.x(d) + tickOffset;
+            },
+            'y1': 0,
+            'y2': $$.height
+        };
+        $$.xgridAttr.opacity = function () {
+            var pos = +d3.select(this).attr(config.axis_rotated ? 'y1' : 'x1');
+            return pos === (config.axis_rotated ? $$.height : 0) ? 0 : 1;
+        };
+
+        var xgrid = $$.main.select('.' + CLASS.xgrids).selectAll('.' + CLASS.xgrid).data(xgridData);
+        var xgridEnter = xgrid.enter().append('line').attr("class", CLASS.xgrid).attr('x1', $$.xgridAttr.x1).attr('x2', $$.xgridAttr.x2).attr('y1', $$.xgridAttr.y1).attr('y2', $$.xgridAttr.y2).style("opacity", 0);
+        $$.xgrid = xgridEnter.merge(xgrid);
+        if (!withoutUpdate) {
+            $$.xgrid.attr('x1', $$.xgridAttr.x1).attr('x2', $$.xgridAttr.x2).attr('y1', $$.xgridAttr.y1).attr('y2', $$.xgridAttr.y2).style("opacity", $$.xgridAttr.opacity);
+        }
+        xgrid.exit().remove();
+    };
+
+    ChartInternal.prototype.updateYGrid = function () {
+        var $$ = this,
+            config = $$.config,
+            gridValues = $$.yAxis.tickValues() || $$.y.ticks(config.grid_y_ticks);
+        var ygrid = $$.main.select('.' + CLASS.ygrids).selectAll('.' + CLASS.ygrid).data(gridValues);
+        var ygridEnter = ygrid.enter().append('line')
+        // TODO: x1, x2, y1, y2, opacity need to be set here maybe
+        .attr('class', CLASS.ygrid);
+        $$.ygrid = ygridEnter.merge(ygrid);
+        $$.ygrid.attr("x1", config.axis_rotated ? $$.y : 0).attr("x2", config.axis_rotated ? $$.y : $$.width).attr("y1", config.axis_rotated ? 0 : $$.y).attr("y2", config.axis_rotated ? $$.height : $$.y);
+        ygrid.exit().remove();
+        $$.smoothLines($$.ygrid, 'grid');
+    };
+
+    ChartInternal.prototype.gridTextAnchor = function (d) {
+        return d.position ? d.position : "end";
+    };
+    ChartInternal.prototype.gridTextDx = function (d) {
+        return d.position === 'start' ? 4 : d.position === 'middle' ? 0 : -4;
+    };
+    ChartInternal.prototype.xGridTextX = function (d) {
+        return d.position === 'start' ? -this.height : d.position === 'middle' ? -this.height / 2 : 0;
+    };
+    ChartInternal.prototype.yGridTextX = function (d) {
+        return d.position === 'start' ? 0 : d.position === 'middle' ? this.width / 2 : this.width;
+    };
+    ChartInternal.prototype.updateGrid = function (duration) {
+        var $$ = this,
+            main = $$.main,
+            config = $$.config,
+            xgridLine,
+            xgridLineEnter,
+            ygridLine,
+            ygridLineEnter,
+            xv = $$.xv.bind($$),
+            yv = $$.yv.bind($$),
+            xGridTextX = $$.xGridTextX.bind($$),
+            yGridTextX = $$.yGridTextX.bind($$);
+
+        // hide if arc type
+        $$.grid.style('visibility', $$.hasArcType() ? 'hidden' : 'visible');
+
+        main.select('line.' + CLASS.xgridFocus).style("visibility", "hidden");
+        if (config.grid_x_show) {
+            $$.updateXGrid();
+        }
+        xgridLine = main.select('.' + CLASS.xgridLines).selectAll('.' + CLASS.xgridLine).data(config.grid_x_lines);
+        // enter
+        xgridLineEnter = xgridLine.enter().append('g').attr("class", function (d) {
+            return CLASS.xgridLine + (d['class'] ? ' ' + d['class'] : '');
+        });
+        xgridLineEnter.append('line').attr("x1", config.axis_rotated ? 0 : xv).attr("x2", config.axis_rotated ? $$.width : xv).attr("y1", config.axis_rotated ? xv : 0).attr("y2", config.axis_rotated ? xv : $$.height).style("opacity", 0);
+        xgridLineEnter.append('text').attr("text-anchor", $$.gridTextAnchor).attr("transform", config.axis_rotated ? "" : "rotate(-90)").attr("x", config.axis_rotated ? yGridTextX : xGridTextX).attr("y", xv).attr('dx', $$.gridTextDx).attr('dy', -5).style("opacity", 0);
+        // udpate
+        $$.xgridLines = xgridLineEnter.merge(xgridLine);
+        // done in d3.transition() of the end of this function
+        // exit
+        xgridLine.exit().transition().duration(duration).style("opacity", 0).remove();
+
+        // Y-Grid
+        if (config.grid_y_show) {
+            $$.updateYGrid();
+        }
+        ygridLine = main.select('.' + CLASS.ygridLines).selectAll('.' + CLASS.ygridLine).data(config.grid_y_lines);
+        // enter
+        ygridLineEnter = ygridLine.enter().append('g').attr("class", function (d) {
+            return CLASS.ygridLine + (d['class'] ? ' ' + d['class'] : '');
+        });
+        ygridLineEnter.append('line').attr("x1", config.axis_rotated ? yv : 0).attr("x2", config.axis_rotated ? yv : $$.width).attr("y1", config.axis_rotated ? 0 : yv).attr("y2", config.axis_rotated ? $$.height : yv).style("opacity", 0);
+        ygridLineEnter.append('text').attr("text-anchor", $$.gridTextAnchor).attr("transform", config.axis_rotated ? "rotate(-90)" : "").attr("x", config.axis_rotated ? xGridTextX : yGridTextX).attr("y", yv).attr('dx', $$.gridTextDx).attr('dy', -5).style("opacity", 0);
+        // update
+        $$.ygridLines = ygridLineEnter.merge(ygridLine);
+        $$.ygridLines.select('line').transition().duration(duration).attr("x1", config.axis_rotated ? yv : 0).attr("x2", config.axis_rotated ? yv : $$.width).attr("y1", config.axis_rotated ? 0 : yv).attr("y2", config.axis_rotated ? $$.height : yv).style("opacity", 1);
+        $$.ygridLines.select('text').transition().duration(duration).attr("x", config.axis_rotated ? $$.xGridTextX.bind($$) : $$.yGridTextX.bind($$)).attr("y", yv).text(function (d) {
+            return d.text;
+        }).style("opacity", 1);
+        // exit
+        ygridLine.exit().transition().duration(duration).style("opacity", 0).remove();
+    };
+    ChartInternal.prototype.redrawGrid = function (withTransition, transition) {
+        var $$ = this,
+            config = $$.config,
+            xv = $$.xv.bind($$),
+            lines = $$.xgridLines.select('line'),
+            texts = $$.xgridLines.select('text');
+        return [(withTransition ? lines.transition(transition) : lines).attr("x1", config.axis_rotated ? 0 : xv).attr("x2", config.axis_rotated ? $$.width : xv).attr("y1", config.axis_rotated ? xv : 0).attr("y2", config.axis_rotated ? xv : $$.height).style("opacity", 1), (withTransition ? texts.transition(transition) : texts).attr("x", config.axis_rotated ? $$.yGridTextX.bind($$) : $$.xGridTextX.bind($$)).attr("y", xv).text(function (d) {
+            return d.text;
+        }).style("opacity", 1)];
+    };
+    ChartInternal.prototype.showXGridFocus = function (selectedData) {
+        var $$ = this,
+            config = $$.config,
+            dataToShow = selectedData.filter(function (d) {
+            return d && isValue(d.value);
+        }),
+            focusEl = $$.main.selectAll('line.' + CLASS.xgridFocus),
+            xx = $$.xx.bind($$);
+        if (!config.tooltip_show) {
+            return;
+        }
+        // Hide when scatter plot exists
+        if ($$.hasType('scatter') || $$.hasArcType()) {
+            return;
+        }
+        focusEl.style("visibility", "visible").data([dataToShow[0]]).attr(config.axis_rotated ? 'y1' : 'x1', xx).attr(config.axis_rotated ? 'y2' : 'x2', xx);
+        $$.smoothLines(focusEl, 'grid');
+    };
+    ChartInternal.prototype.hideXGridFocus = function () {
+        this.main.select('line.' + CLASS.xgridFocus).style("visibility", "hidden");
+    };
+    ChartInternal.prototype.updateXgridFocus = function () {
+        var $$ = this,
+            config = $$.config;
+        $$.main.select('line.' + CLASS.xgridFocus).attr("x1", config.axis_rotated ? 0 : -10).attr("x2", config.axis_rotated ? $$.width : -10).attr("y1", config.axis_rotated ? -10 : 0).attr("y2", config.axis_rotated ? -10 : $$.height);
+    };
+    ChartInternal.prototype.generateGridData = function (type, scale) {
+        var $$ = this,
+            gridData = [],
+            xDomain,
+            firstYear,
+            lastYear,
+            i,
+            tickNum = $$.main.select("." + CLASS.axisX).selectAll('.tick').size();
+        if (type === 'year') {
+            xDomain = $$.getXDomain();
+            firstYear = xDomain[0].getFullYear();
+            lastYear = xDomain[1].getFullYear();
+            for (i = firstYear; i <= lastYear; i++) {
+                gridData.push(new Date(i + '-01-01 00:00:00'));
+            }
+        } else {
+            gridData = scale.ticks(10);
+            if (gridData.length > tickNum) {
+                // use only int
+                gridData = gridData.filter(function (d) {
+                    return ("" + d).indexOf('.') < 0;
+                });
+            }
+        }
+        return gridData;
+    };
+    ChartInternal.prototype.getGridFilterToRemove = function (params) {
+        return params ? function (line) {
+            var found = false;
+            [].concat(params).forEach(function (param) {
+                if ('value' in param && line.value === param.value || 'class' in param && line['class'] === param['class']) {
+                    found = true;
+                }
+            });
+            return found;
+        } : function () {
+            return true;
+        };
+    };
+    ChartInternal.prototype.removeGridLines = function (params, forX) {
+        var $$ = this,
+            config = $$.config,
+            toRemove = $$.getGridFilterToRemove(params),
+            toShow = function toShow(line) {
+            return !toRemove(line);
+        },
+            classLines = forX ? CLASS.xgridLines : CLASS.ygridLines,
+            classLine = forX ? CLASS.xgridLine : CLASS.ygridLine;
+        $$.main.select('.' + classLines).selectAll('.' + classLine).filter(toRemove).transition().duration(config.transition_duration).style('opacity', 0).remove();
+        if (forX) {
+            config.grid_x_lines = config.grid_x_lines.filter(toShow);
+        } else {
+            config.grid_y_lines = config.grid_y_lines.filter(toShow);
+        }
+    };
+
+    ChartInternal.prototype.initEventRect = function () {
+        var $$ = this,
+            config = $$.config;
+
+        $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.eventRects).style('fill-opacity', 0);
+        $$.eventRect = $$.main.select('.' + CLASS.eventRects).append('rect').attr('class', CLASS.eventRect);
+
+        // event rect handle zoom event as well
+        if (config.zoom_enabled && $$.zoom) {
+            $$.eventRect.call($$.zoom).on("dblclick.zoom", null);
+            if (config.zoom_initialRange) {
+                // WORKAROUND: Add transition to apply transform immediately when no subchart
+                $$.eventRect.transition().duration(0).call($$.zoom.transform, $$.zoomTransform(config.zoom_initialRange));
+            }
+        }
+    };
+    ChartInternal.prototype.redrawEventRect = function () {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config,
+            x,
+            y,
+            w,
+            h;
+
+        // TODO: rotated not supported yet
+        x = 0;
+        y = 0;
+        w = $$.width;
+        h = $$.height;
+
+        function mouseout() {
+            $$.svg.select('.' + CLASS.eventRect).style('cursor', null);
+            $$.hideXGridFocus();
+            $$.hideTooltip();
+            $$.unexpandCircles();
+            $$.unexpandBars();
+        }
+
+        // rects for mouseover
+        $$.main.select('.' + CLASS.eventRects).style('cursor', config.zoom_enabled ? config.axis_rotated ? 'ns-resize' : 'ew-resize' : null);
+
+        $$.eventRect.attr('x', x).attr('y', y).attr('width', w).attr('height', h).on('mouseout', config.interaction_enabled ? function () {
+            if (!config) {
+                return;
+            } // chart is destroyed
+            if ($$.hasArcType()) {
+                return;
+            }
+            mouseout();
+        } : null).on('mousemove', config.interaction_enabled ? function () {
+            var targetsToShow, mouse, closest, sameXData, selectedData;
+
+            if ($$.dragging) {
+                return;
+            } // do nothing when dragging
+            if ($$.hasArcType(targetsToShow)) {
+                return;
+            }
+
+            targetsToShow = $$.filterTargetsToShow($$.data.targets);
+            mouse = d3.mouse(this);
+            closest = $$.findClosestFromTargets(targetsToShow, mouse);
+
+            if ($$.mouseover && (!closest || closest.id !== $$.mouseover.id)) {
+                config.data_onmouseout.call($$.api, $$.mouseover);
+                $$.mouseover = undefined;
+            }
+
+            if (!closest) {
+                mouseout();
+                return;
+            }
+
+            if ($$.isScatterType(closest) || !config.tooltip_grouped) {
+                sameXData = [closest];
+            } else {
+                sameXData = $$.filterByX(targetsToShow, closest.x);
+            }
+
+            // show tooltip when cursor is close to some point
+            selectedData = sameXData.map(function (d) {
+                return $$.addName(d);
+            });
+            $$.showTooltip(selectedData, this);
+
+            // expand points
+            if (config.point_focus_expand_enabled) {
+                $$.unexpandCircles();
+                selectedData.forEach(function (d) {
+                    $$.expandCircles(d.index, d.id, false);
+                });
+            }
+            $$.expandBars(closest.index, closest.id, true);
+
+            // Show xgrid focus line
+            $$.showXGridFocus(selectedData);
+
+            // Show cursor as pointer if point is close to mouse position
+            if ($$.isBarType(closest.id) || $$.dist(closest, mouse) < config.point_sensitivity) {
+                $$.svg.select('.' + CLASS.eventRect).style('cursor', 'pointer');
+                if (!$$.mouseover) {
+                    config.data_onmouseover.call($$.api, closest);
+                    $$.mouseover = closest;
+                }
+            }
+        } : null).on('click', config.interaction_enabled ? function () {
+            var targetsToShow, mouse, closest, sameXData;
+            if ($$.hasArcType(targetsToShow)) {
+                return;
+            }
+
+            targetsToShow = $$.filterTargetsToShow($$.data.targets);
+            mouse = d3.mouse(this);
+            closest = $$.findClosestFromTargets(targetsToShow, mouse);
+            if (!closest) {
+                return;
+            }
+            // select if selection enabled
+            if ($$.isBarType(closest.id) || $$.dist(closest, mouse) < config.point_sensitivity) {
+                if ($$.isScatterType(closest) || !config.data_selection_grouped) {
+                    sameXData = [closest];
+                } else {
+                    sameXData = $$.filterByX(targetsToShow, closest.x);
+                }
+                sameXData.forEach(function (d) {
+                    $$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(d.id)).selectAll('.' + CLASS.shape + '-' + d.index).each(function () {
+                        if (config.data_selection_grouped || $$.isWithinShape(this, d)) {
+                            $$.toggleShape(this, d, d.index);
+                            config.data_onclick.call($$.api, d, this);
+                        }
+                    });
+                });
+            }
+        } : null).call(config.interaction_enabled && config.data_selection_draggable && $$.drag ? d3.drag().on('drag', function () {
+            $$.drag(d3.mouse(this));
+        }).on('start', function () {
+            $$.dragstart(d3.mouse(this));
+        }).on('end', function () {
+            $$.dragend();
+        }) : function () {});
+    };
+    ChartInternal.prototype.getMousePosition = function (data) {
+        var $$ = this;
+        return [$$.x(data.x), $$.getYScale(data.id)(data.value)];
+    };
+    ChartInternal.prototype.dispatchEvent = function (type, mouse) {
+        var $$ = this,
+            selector = '.' + CLASS.eventRect,
+            eventRect = $$.main.select(selector).node(),
+            box = eventRect.getBoundingClientRect(),
+            x = box.left + (mouse ? mouse[0] : 0),
+            y = box.top + (mouse ? mouse[1] : 0),
+            event = document.createEvent("MouseEvents");
+
+        event.initMouseEvent(type, true, true, window, 0, x, y, x, y, false, false, false, false, 0, null);
+        eventRect.dispatchEvent(event);
+    };
+
+    ChartInternal.prototype.initLegend = function () {
+        var $$ = this;
+        $$.legendItemTextBox = {};
+        $$.legendHasRendered = false;
+        $$.legend = $$.svg.append("g").attr("transform", $$.getTranslate('legend'));
+        if (!$$.config.legend_show) {
+            $$.legend.style('visibility', 'hidden');
+            $$.hiddenLegendIds = $$.mapToIds($$.data.targets);
+            return;
+        }
+        // MEMO: call here to update legend box and tranlate for all
+        // MEMO: translate will be upated by this, so transform not needed in updateLegend()
+        $$.updateLegendWithDefaults();
+    };
+    ChartInternal.prototype.updateLegendWithDefaults = function () {
+        var $$ = this;
+        $$.updateLegend($$.mapToIds($$.data.targets), { withTransform: false, withTransitionForTransform: false, withTransition: false });
+    };
+    ChartInternal.prototype.updateSizeForLegend = function (legendHeight, legendWidth) {
+        var $$ = this,
+            config = $$.config,
+            insetLegendPosition = {
+            top: $$.isLegendTop ? $$.getCurrentPaddingTop() + config.legend_inset_y + 5.5 : $$.currentHeight - legendHeight - $$.getCurrentPaddingBottom() - config.legend_inset_y,
+            left: $$.isLegendLeft ? $$.getCurrentPaddingLeft() + config.legend_inset_x + 0.5 : $$.currentWidth - legendWidth - $$.getCurrentPaddingRight() - config.legend_inset_x + 0.5
+        };
+
+        $$.margin3 = {
+            top: $$.isLegendRight ? 0 : $$.isLegendInset ? insetLegendPosition.top : $$.currentHeight - legendHeight,
+            right: NaN,
+            bottom: 0,
+            left: $$.isLegendRight ? $$.currentWidth - legendWidth : $$.isLegendInset ? insetLegendPosition.left : 0
+        };
+    };
+    ChartInternal.prototype.transformLegend = function (withTransition) {
+        var $$ = this;
+        (withTransition ? $$.legend.transition() : $$.legend).attr("transform", $$.getTranslate('legend'));
+    };
+    ChartInternal.prototype.updateLegendStep = function (step) {
+        this.legendStep = step;
+    };
+    ChartInternal.prototype.updateLegendItemWidth = function (w) {
+        this.legendItemWidth = w;
+    };
+    ChartInternal.prototype.updateLegendItemHeight = function (h) {
+        this.legendItemHeight = h;
+    };
+    ChartInternal.prototype.getLegendWidth = function () {
+        var $$ = this;
+        return $$.config.legend_show ? $$.isLegendRight || $$.isLegendInset ? $$.legendItemWidth * ($$.legendStep + 1) : $$.currentWidth : 0;
+    };
+    ChartInternal.prototype.getLegendHeight = function () {
+        var $$ = this,
+            h = 0;
+        if ($$.config.legend_show) {
+            if ($$.isLegendRight) {
+                h = $$.currentHeight;
+            } else {
+                h = Math.max(20, $$.legendItemHeight) * ($$.legendStep + 1);
+            }
+        }
+        return h;
+    };
+    ChartInternal.prototype.opacityForLegend = function (legendItem) {
+        return legendItem.classed(CLASS.legendItemHidden) ? null : 1;
+    };
+    ChartInternal.prototype.opacityForUnfocusedLegend = function (legendItem) {
+        return legendItem.classed(CLASS.legendItemHidden) ? null : 0.3;
+    };
+    ChartInternal.prototype.toggleFocusLegend = function (targetIds, focus) {
+        var $$ = this;
+        targetIds = $$.mapToTargetIds(targetIds);
+        $$.legend.selectAll('.' + CLASS.legendItem).filter(function (id) {
+            return targetIds.indexOf(id) >= 0;
+        }).classed(CLASS.legendItemFocused, focus).transition().duration(100).style('opacity', function () {
+            var opacity = focus ? $$.opacityForLegend : $$.opacityForUnfocusedLegend;
+            return opacity.call($$, $$.d3.select(this));
+        });
+    };
+    ChartInternal.prototype.revertLegend = function () {
+        var $$ = this,
+            d3 = $$.d3;
+        $$.legend.selectAll('.' + CLASS.legendItem).classed(CLASS.legendItemFocused, false).transition().duration(100).style('opacity', function () {
+            return $$.opacityForLegend(d3.select(this));
+        });
+    };
+    ChartInternal.prototype.showLegend = function (targetIds) {
+        var $$ = this,
+            config = $$.config;
+        if (!config.legend_show) {
+            config.legend_show = true;
+            $$.legend.style('visibility', 'visible');
+            if (!$$.legendHasRendered) {
+                $$.updateLegendWithDefaults();
+            }
+        }
+        $$.removeHiddenLegendIds(targetIds);
+        $$.legend.selectAll($$.selectorLegends(targetIds)).style('visibility', 'visible').transition().style('opacity', function () {
+            return $$.opacityForLegend($$.d3.select(this));
+        });
+    };
+    ChartInternal.prototype.hideLegend = function (targetIds) {
+        var $$ = this,
+            config = $$.config;
+        if (config.legend_show && isEmpty(targetIds)) {
+            config.legend_show = false;
+            $$.legend.style('visibility', 'hidden');
+        }
+        $$.addHiddenLegendIds(targetIds);
+        $$.legend.selectAll($$.selectorLegends(targetIds)).style('opacity', 0).style('visibility', 'hidden');
+    };
+    ChartInternal.prototype.clearLegendItemTextBoxCache = function () {
+        this.legendItemTextBox = {};
+    };
+    ChartInternal.prototype.updateLegend = function (targetIds, options, transitions) {
+        var $$ = this,
+            config = $$.config;
+        var xForLegend, xForLegendText, xForLegendRect, yForLegend, yForLegendText, yForLegendRect, x1ForLegendTile, x2ForLegendTile, yForLegendTile;
+        var paddingTop = 4,
+            paddingRight = 10,
+            maxWidth = 0,
+            maxHeight = 0,
+            posMin = 10,
+            tileWidth = config.legend_item_tile_width + 5;
+        var l,
+            totalLength = 0,
+            offsets = {},
+            widths = {},
+            heights = {},
+            margins = [0],
+            steps = {},
+            step = 0;
+        var withTransition, withTransitionForTransform;
+        var texts, rects, tiles, background;
+
+        // Skip elements when their name is set to null
+        targetIds = targetIds.filter(function (id) {
+            return !isDefined(config.data_names[id]) || config.data_names[id] !== null;
+        });
+
+        options = options || {};
+        withTransition = getOption(options, "withTransition", true);
+        withTransitionForTransform = getOption(options, "withTransitionForTransform", true);
+
+        function getTextBox(textElement, id) {
+            if (!$$.legendItemTextBox[id]) {
+                $$.legendItemTextBox[id] = $$.getTextRect(textElement.textContent, CLASS.legendItem, textElement);
+            }
+            return $$.legendItemTextBox[id];
+        }
+
+        function updatePositions(textElement, id, index) {
+            var reset = index === 0,
+                isLast = index === targetIds.length - 1,
+                box = getTextBox(textElement, id),
+                itemWidth = box.width + tileWidth + (isLast && !($$.isLegendRight || $$.isLegendInset) ? 0 : paddingRight) + config.legend_padding,
+                itemHeight = box.height + paddingTop,
+                itemLength = $$.isLegendRight || $$.isLegendInset ? itemHeight : itemWidth,
+                areaLength = $$.isLegendRight || $$.isLegendInset ? $$.getLegendHeight() : $$.getLegendWidth(),
+                margin,
+                maxLength;
+
+            // MEMO: care about condifion of step, totalLength
+            function updateValues(id, withoutStep) {
+                if (!withoutStep) {
+                    margin = (areaLength - totalLength - itemLength) / 2;
+                    if (margin < posMin) {
+                        margin = (areaLength - itemLength) / 2;
+                        totalLength = 0;
+                        step++;
+                    }
+                }
+                steps[id] = step;
+                margins[step] = $$.isLegendInset ? 10 : margin;
+                offsets[id] = totalLength;
+                totalLength += itemLength;
+            }
+
+            if (reset) {
+                totalLength = 0;
+                step = 0;
+                maxWidth = 0;
+                maxHeight = 0;
+            }
+
+            if (config.legend_show && !$$.isLegendToShow(id)) {
+                widths[id] = heights[id] = steps[id] = offsets[id] = 0;
+                return;
+            }
+
+            widths[id] = itemWidth;
+            heights[id] = itemHeight;
+
+            if (!maxWidth || itemWidth >= maxWidth) {
+                maxWidth = itemWidth;
+            }
+            if (!maxHeight || itemHeight >= maxHeight) {
+                maxHeight = itemHeight;
+            }
+            maxLength = $$.isLegendRight || $$.isLegendInset ? maxHeight : maxWidth;
+
+            if (config.legend_equally) {
+                Object.keys(widths).forEach(function (id) {
+                    widths[id] = maxWidth;
+                });
+                Object.keys(heights).forEach(function (id) {
+                    heights[id] = maxHeight;
+                });
+                margin = (areaLength - maxLength * targetIds.length) / 2;
+                if (margin < posMin) {
+                    totalLength = 0;
+                    step = 0;
+                    targetIds.forEach(function (id) {
+                        updateValues(id);
+                    });
+                } else {
+                    updateValues(id, true);
+                }
+            } else {
+                updateValues(id);
+            }
+        }
+
+        if ($$.isLegendInset) {
+            step = config.legend_inset_step ? config.legend_inset_step : targetIds.length;
+            $$.updateLegendStep(step);
+        }
+
+        if ($$.isLegendRight) {
+            xForLegend = function xForLegend(id) {
+                return maxWidth * steps[id];
+            };
+            yForLegend = function yForLegend(id) {
+                return margins[steps[id]] + offsets[id];
+            };
+        } else if ($$.isLegendInset) {
+            xForLegend = function xForLegend(id) {
+                return maxWidth * steps[id] + 10;
+            };
+            yForLegend = function yForLegend(id) {
+                return margins[steps[id]] + offsets[id];
+            };
+        } else {
+            xForLegend = function xForLegend(id) {
+                return margins[steps[id]] + offsets[id];
+            };
+            yForLegend = function yForLegend(id) {
+                return maxHeight * steps[id];
+            };
+        }
+        xForLegendText = function xForLegendText(id, i) {
+            return xForLegend(id, i) + 4 + config.legend_item_tile_width;
+        };
+        yForLegendText = function yForLegendText(id, i) {
+            return yForLegend(id, i) + 9;
+        };
+        xForLegendRect = function xForLegendRect(id, i) {
+            return xForLegend(id, i);
+        };
+        yForLegendRect = function yForLegendRect(id, i) {
+            return yForLegend(id, i) - 5;
+        };
+        x1ForLegendTile = function x1ForLegendTile(id, i) {
+            return xForLegend(id, i) - 2;
+        };
+        x2ForLegendTile = function x2ForLegendTile(id, i) {
+            return xForLegend(id, i) - 2 + config.legend_item_tile_width;
+        };
+        yForLegendTile = function yForLegendTile(id, i) {
+            return yForLegend(id, i) + 4;
+        };
+
+        // Define g for legend area
+        l = $$.legend.selectAll('.' + CLASS.legendItem).data(targetIds).enter().append('g').attr('class', function (id) {
+            return $$.generateClass(CLASS.legendItem, id);
+        }).style('visibility', function (id) {
+            return $$.isLegendToShow(id) ? 'visible' : 'hidden';
+        }).style('cursor', 'pointer').on('click', function (id) {
+            if (config.legend_item_onclick) {
+                config.legend_item_onclick.call($$, id);
+            } else {
+                if ($$.d3.event.altKey) {
+                    $$.api.hide();
+                    $$.api.show(id);
+                } else {
+                    $$.api.toggle(id);
+                    $$.isTargetToShow(id) ? $$.api.focus(id) : $$.api.revert();
+                }
+            }
+        }).on('mouseover', function (id) {
+            if (config.legend_item_onmouseover) {
+                config.legend_item_onmouseover.call($$, id);
+            } else {
+                $$.d3.select(this).classed(CLASS.legendItemFocused, true);
+                if (!$$.transiting && $$.isTargetToShow(id)) {
+                    $$.api.focus(id);
+                }
+            }
+        }).on('mouseout', function (id) {
+            if (config.legend_item_onmouseout) {
+                config.legend_item_onmouseout.call($$, id);
+            } else {
+                $$.d3.select(this).classed(CLASS.legendItemFocused, false);
+                $$.api.revert();
+            }
+        });
+        l.append('text').text(function (id) {
+            return isDefined(config.data_names[id]) ? config.data_names[id] : id;
+        }).each(function (id, i) {
+            updatePositions(this, id, i);
+        }).style("pointer-events", "none").attr('x', $$.isLegendRight || $$.isLegendInset ? xForLegendText : -200).attr('y', $$.isLegendRight || $$.isLegendInset ? -200 : yForLegendText);
+        l.append('rect').attr("class", CLASS.legendItemEvent).style('fill-opacity', 0).attr('x', $$.isLegendRight || $$.isLegendInset ? xForLegendRect : -200).attr('y', $$.isLegendRight || $$.isLegendInset ? -200 : yForLegendRect);
+        l.append('line').attr('class', CLASS.legendItemTile).style('stroke', $$.color).style("pointer-events", "none").attr('x1', $$.isLegendRight || $$.isLegendInset ? x1ForLegendTile : -200).attr('y1', $$.isLegendRight || $$.isLegendInset ? -200 : yForLegendTile).attr('x2', $$.isLegendRight || $$.isLegendInset ? x2ForLegendTile : -200).attr('y2', $$.isLegendRight || $$.isLegendInset ? -200 : yForLegendTile).attr('stroke-width', config.legend_item_tile_height);
+
+        // Set background for inset legend
+        background = $$.legend.select('.' + CLASS.legendBackground + ' rect');
+        if ($$.isLegendInset && maxWidth > 0 && background.size() === 0) {
+            background = $$.legend.insert('g', '.' + CLASS.legendItem).attr("class", CLASS.legendBackground).append('rect');
+        }
+
+        texts = $$.legend.selectAll('text').data(targetIds).text(function (id) {
+            return isDefined(config.data_names[id]) ? config.data_names[id] : id;
+        }) // MEMO: needed for update
+        .each(function (id, i) {
+            updatePositions(this, id, i);
+        });
+        (withTransition ? texts.transition() : texts).attr('x', xForLegendText).attr('y', yForLegendText);
+
+        rects = $$.legend.selectAll('rect.' + CLASS.legendItemEvent).data(targetIds);
+        (withTransition ? rects.transition() : rects).attr('width', function (id) {
+            return widths[id];
+        }).attr('height', function (id) {
+            return heights[id];
+        }).attr('x', xForLegendRect).attr('y', yForLegendRect);
+
+        tiles = $$.legend.selectAll('line.' + CLASS.legendItemTile).data(targetIds);
+        (withTransition ? tiles.transition() : tiles).style('stroke', $$.levelColor ? function (id) {
+            return $$.levelColor($$.cache[id].values[0].value);
+        } : $$.color).attr('x1', x1ForLegendTile).attr('y1', yForLegendTile).attr('x2', x2ForLegendTile).attr('y2', yForLegendTile);
+
+        if (background) {
+            (withTransition ? background.transition() : background).attr('height', $$.getLegendHeight() - 12).attr('width', maxWidth * (step + 1) + 10);
+        }
+
+        // toggle legend state
+        $$.legend.selectAll('.' + CLASS.legendItem).classed(CLASS.legendItemHidden, function (id) {
+            return !$$.isTargetToShow(id);
+        });
+
+        // Update all to reflect change of legend
+        $$.updateLegendItemWidth(maxWidth);
+        $$.updateLegendItemHeight(maxHeight);
+        $$.updateLegendStep(step);
+        // Update size and scale
+        $$.updateSizes();
+        $$.updateScales();
+        $$.updateSvgSize();
+        // Update g positions
+        $$.transformAll(withTransitionForTransform, transitions);
+        $$.legendHasRendered = true;
+    };
+
+    ChartInternal.prototype.initRegion = function () {
+        var $$ = this;
+        $$.region = $$.main.append('g').attr("clip-path", $$.clipPath).attr("class", CLASS.regions);
+    };
+    ChartInternal.prototype.updateRegion = function (duration) {
+        var $$ = this,
+            config = $$.config;
+
+        // hide if arc type
+        $$.region.style('visibility', $$.hasArcType() ? 'hidden' : 'visible');
+
+        var mainRegion = $$.main.select('.' + CLASS.regions).selectAll('.' + CLASS.region).data(config.regions);
+        var mainRegionEnter = mainRegion.enter().append('rect').attr("x", $$.regionX.bind($$)).attr("y", $$.regionY.bind($$)).attr("width", $$.regionWidth.bind($$)).attr("height", $$.regionHeight.bind($$)).style("fill-opacity", 0);
+        $$.mainRegion = mainRegionEnter.merge(mainRegion).attr('class', $$.classRegion.bind($$));
+        mainRegion.exit().transition().duration(duration).style("opacity", 0).remove();
+    };
+    ChartInternal.prototype.redrawRegion = function (withTransition, transition) {
+        var $$ = this,
+            regions = $$.mainRegion;
+        return [(withTransition ? regions.transition(transition) : regions).attr("x", $$.regionX.bind($$)).attr("y", $$.regionY.bind($$)).attr("width", $$.regionWidth.bind($$)).attr("height", $$.regionHeight.bind($$)).style("fill-opacity", function (d) {
+            return isValue(d.opacity) ? d.opacity : 0.1;
+        })];
+    };
+    ChartInternal.prototype.regionX = function (d) {
+        var $$ = this,
+            config = $$.config,
+            xPos,
+            yScale = d.axis === 'y' ? $$.y : $$.y2;
+        if (d.axis === 'y' || d.axis === 'y2') {
+            xPos = config.axis_rotated ? 'start' in d ? yScale(d.start) : 0 : 0;
+        } else {
+            xPos = config.axis_rotated ? 0 : 'start' in d ? $$.x($$.isTimeSeries() ? $$.parseDate(d.start) : d.start) : 0;
+        }
+        return xPos;
+    };
+    ChartInternal.prototype.regionY = function (d) {
+        var $$ = this,
+            config = $$.config,
+            yPos,
+            yScale = d.axis === 'y' ? $$.y : $$.y2;
+        if (d.axis === 'y' || d.axis === 'y2') {
+            yPos = config.axis_rotated ? 0 : 'end' in d ? yScale(d.end) : 0;
+        } else {
+            yPos = config.axis_rotated ? 'start' in d ? $$.x($$.isTimeSeries() ? $$.parseDate(d.start) : d.start) : 0 : 0;
+        }
+        return yPos;
+    };
+    ChartInternal.prototype.regionWidth = function (d) {
+        var $$ = this,
+            config = $$.config,
+            start = $$.regionX(d),
+            end,
+            yScale = d.axis === 'y' ? $$.y : $$.y2;
+        if (d.axis === 'y' || d.axis === 'y2') {
+            end = config.axis_rotated ? 'end' in d ? yScale(d.end) : $$.width : $$.width;
+        } else {
+            end = config.axis_rotated ? $$.width : 'end' in d ? $$.x($$.isTimeSeries() ? $$.parseDate(d.end) : d.end) : $$.width;
+        }
+        return end < start ? 0 : end - start;
+    };
+    ChartInternal.prototype.regionHeight = function (d) {
+        var $$ = this,
+            config = $$.config,
+            start = this.regionY(d),
+            end,
+            yScale = d.axis === 'y' ? $$.y : $$.y2;
+        if (d.axis === 'y' || d.axis === 'y2') {
+            end = config.axis_rotated ? $$.height : 'start' in d ? yScale(d.start) : $$.height;
+        } else {
+            end = config.axis_rotated ? 'end' in d ? $$.x($$.isTimeSeries() ? $$.parseDate(d.end) : d.end) : $$.height : $$.height;
+        }
+        return end < start ? 0 : end - start;
+    };
+    ChartInternal.prototype.isRegionOnX = function (d) {
+        return !d.axis || d.axis === 'x';
+    };
+
+    ChartInternal.prototype.getScale = function (min, max, forTimeseries) {
+        return (forTimeseries ? this.d3.scaleTime() : this.d3.scaleLinear()).range([min, max]);
+    };
+    ChartInternal.prototype.getX = function (min, max, domain, offset) {
+        var $$ = this,
+            scale = $$.getScale(min, max, $$.isTimeSeries()),
+            _scale = domain ? scale.domain(domain) : scale,
+            key;
+        // Define customized scale if categorized axis
+        if ($$.isCategorized()) {
+            offset = offset || function () {
+                return 0;
+            };
+            scale = function scale(d, raw) {
+                var v = _scale(d) + offset(d);
+                return raw ? v : Math.ceil(v);
+            };
+        } else {
+            scale = function scale(d, raw) {
+                var v = _scale(d);
+                return raw ? v : Math.ceil(v);
+            };
+        }
+        // define functions
+        for (key in _scale) {
+            scale[key] = _scale[key];
+        }
+        scale.orgDomain = function () {
+            return _scale.domain();
+        };
+        // define custom domain() for categorized axis
+        if ($$.isCategorized()) {
+            scale.domain = function (domain) {
+                if (!arguments.length) {
+                    domain = this.orgDomain();
+                    return [domain[0], domain[1] + 1];
+                }
+                _scale.domain(domain);
+                return scale;
+            };
+        }
+        return scale;
+    };
+    ChartInternal.prototype.getY = function (min, max, domain) {
+        var scale = this.getScale(min, max, this.isTimeSeriesY());
+        if (domain) {
+            scale.domain(domain);
+        }
+        return scale;
+    };
+    ChartInternal.prototype.getYScale = function (id) {
+        return this.axis.getId(id) === 'y2' ? this.y2 : this.y;
+    };
+    ChartInternal.prototype.getSubYScale = function (id) {
+        return this.axis.getId(id) === 'y2' ? this.subY2 : this.subY;
+    };
+    ChartInternal.prototype.updateScales = function () {
+        var $$ = this,
+            config = $$.config,
+            forInit = !$$.x;
+        // update edges
+        $$.xMin = config.axis_rotated ? 1 : 0;
+        $$.xMax = config.axis_rotated ? $$.height : $$.width;
+        $$.yMin = config.axis_rotated ? 0 : $$.height;
+        $$.yMax = config.axis_rotated ? $$.width : 1;
+        $$.subXMin = $$.xMin;
+        $$.subXMax = $$.xMax;
+        $$.subYMin = config.axis_rotated ? 0 : $$.height2;
+        $$.subYMax = config.axis_rotated ? $$.width2 : 1;
+        // update scales
+        $$.x = $$.getX($$.xMin, $$.xMax, forInit ? undefined : $$.x.orgDomain(), function () {
+            return $$.xAxis.tickOffset();
+        });
+        $$.y = $$.getY($$.yMin, $$.yMax, forInit ? config.axis_y_default : $$.y.domain());
+        $$.y2 = $$.getY($$.yMin, $$.yMax, forInit ? config.axis_y2_default : $$.y2.domain());
+        $$.subX = $$.getX($$.xMin, $$.xMax, $$.orgXDomain, function (d) {
+            return d % 1 ? 0 : $$.subXAxis.tickOffset();
+        });
+        $$.subY = $$.getY($$.subYMin, $$.subYMax, forInit ? config.axis_y_default : $$.subY.domain());
+        $$.subY2 = $$.getY($$.subYMin, $$.subYMax, forInit ? config.axis_y2_default : $$.subY2.domain());
+        // update axes
+        $$.xAxisTickFormat = $$.axis.getXAxisTickFormat();
+        $$.xAxisTickValues = $$.axis.getXAxisTickValues();
+        $$.yAxisTickValues = $$.axis.getYAxisTickValues();
+        $$.y2AxisTickValues = $$.axis.getY2AxisTickValues();
+
+        $$.xAxis = $$.axis.getXAxis($$.x, $$.xOrient, $$.xAxisTickFormat, $$.xAxisTickValues, config.axis_x_tick_outer);
+        $$.subXAxis = $$.axis.getXAxis($$.subX, $$.subXOrient, $$.xAxisTickFormat, $$.xAxisTickValues, config.axis_x_tick_outer);
+        $$.yAxis = $$.axis.getYAxis($$.y, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, config.axis_y_tick_outer);
+        $$.y2Axis = $$.axis.getYAxis($$.y2, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, config.axis_y2_tick_outer);
+
+        // Set initialized scales to brush and zoom
+        if (!forInit) {
+            if ($$.brush) {
+                $$.brush.updateScale($$.subX);
+            }
+        }
+        // update for arc
+        if ($$.updateArc) {
+            $$.updateArc();
+        }
+    };
+
+    ChartInternal.prototype.selectPoint = function (target, d, i) {
+        var $$ = this,
+            config = $$.config,
+            cx = (config.axis_rotated ? $$.circleY : $$.circleX).bind($$),
+            cy = (config.axis_rotated ? $$.circleX : $$.circleY).bind($$),
+            r = $$.pointSelectR.bind($$);
+        config.data_onselected.call($$.api, d, target.node());
+        // add selected-circle on low layer g
+        $$.main.select('.' + CLASS.selectedCircles + $$.getTargetSelectorSuffix(d.id)).selectAll('.' + CLASS.selectedCircle + '-' + i).data([d]).enter().append('circle').attr("class", function () {
+            return $$.generateClass(CLASS.selectedCircle, i);
+        }).attr("cx", cx).attr("cy", cy).attr("stroke", function () {
+            return $$.color(d);
+        }).attr("r", function (d) {
+            return $$.pointSelectR(d) * 1.4;
+        }).transition().duration(100).attr("r", r);
+    };
+    ChartInternal.prototype.unselectPoint = function (target, d, i) {
+        var $$ = this;
+        $$.config.data_onunselected.call($$.api, d, target.node());
+        // remove selected-circle from low layer g
+        $$.main.select('.' + CLASS.selectedCircles + $$.getTargetSelectorSuffix(d.id)).selectAll('.' + CLASS.selectedCircle + '-' + i).transition().duration(100).attr('r', 0).remove();
+    };
+    ChartInternal.prototype.togglePoint = function (selected, target, d, i) {
+        selected ? this.selectPoint(target, d, i) : this.unselectPoint(target, d, i);
+    };
+    ChartInternal.prototype.selectPath = function (target, d) {
+        var $$ = this;
+        $$.config.data_onselected.call($$, d, target.node());
+        if ($$.config.interaction_brighten) {
+            target.transition().duration(100).style("fill", function () {
+                return $$.d3.rgb($$.color(d)).brighter(0.75);
+            });
+        }
+    };
+    ChartInternal.prototype.unselectPath = function (target, d) {
+        var $$ = this;
+        $$.config.data_onunselected.call($$, d, target.node());
+        if ($$.config.interaction_brighten) {
+            target.transition().duration(100).style("fill", function () {
+                return $$.color(d);
+            });
+        }
+    };
+    ChartInternal.prototype.togglePath = function (selected, target, d, i) {
+        selected ? this.selectPath(target, d, i) : this.unselectPath(target, d, i);
+    };
+    ChartInternal.prototype.getToggle = function (that, d) {
+        var $$ = this,
+            toggle;
+        if (that.nodeName === 'circle') {
+            if ($$.isStepType(d)) {
+                // circle is hidden in step chart, so treat as within the click area
+                toggle = function toggle() {}; // TODO: how to select step chart?
+            } else {
+                toggle = $$.togglePoint;
+            }
+        } else if (that.nodeName === 'path') {
+            toggle = $$.togglePath;
+        }
+        return toggle;
+    };
+    ChartInternal.prototype.toggleShape = function (that, d, i) {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config,
+            shape = d3.select(that),
+            isSelected = shape.classed(CLASS.SELECTED),
+            toggle = $$.getToggle(that, d).bind($$);
+
+        if (config.data_selection_enabled && config.data_selection_isselectable(d)) {
+            if (!config.data_selection_multiple) {
+                $$.main.selectAll('.' + CLASS.shapes + (config.data_selection_grouped ? $$.getTargetSelectorSuffix(d.id) : "")).selectAll('.' + CLASS.shape).each(function (d, i) {
+                    var shape = d3.select(this);
+                    if (shape.classed(CLASS.SELECTED)) {
+                        toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
+                    }
+                });
+            }
+            shape.classed(CLASS.SELECTED, !isSelected);
+            toggle(!isSelected, shape, d, i);
+        }
+    };
+
+    ChartInternal.prototype.initBar = function () {
+        var $$ = this;
+        $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartBars);
+    };
+    ChartInternal.prototype.updateTargetsForBar = function (targets) {
+        var $$ = this,
+            config = $$.config,
+            mainBars,
+            mainBarEnter,
+            classChartBar = $$.classChartBar.bind($$),
+            classBars = $$.classBars.bind($$),
+            classFocus = $$.classFocus.bind($$);
+        mainBars = $$.main.select('.' + CLASS.chartBars).selectAll('.' + CLASS.chartBar).data(targets).attr('class', function (d) {
+            return classChartBar(d) + classFocus(d);
+        });
+        mainBarEnter = mainBars.enter().append('g').attr('class', classChartBar).style("pointer-events", "none");
+        // Bars for each data
+        mainBarEnter.append('g').attr("class", classBars).style("cursor", function (d) {
+            return config.data_selection_isselectable(d) ? "pointer" : null;
+        });
+    };
+    ChartInternal.prototype.updateBar = function (durationForExit) {
+        var $$ = this,
+            barData = $$.barData.bind($$),
+            classBar = $$.classBar.bind($$),
+            initialOpacity = $$.initialOpacity.bind($$),
+            color = function color(d) {
+            return $$.color(d.id);
+        };
+        var mainBar = $$.main.selectAll('.' + CLASS.bars).selectAll('.' + CLASS.bar).data(barData);
+        var mainBarEnter = mainBar.enter().append('path').attr("class", classBar).style("stroke", color).style("fill", color);
+        $$.mainBar = mainBarEnter.merge(mainBar).style("opacity", initialOpacity);
+        mainBar.exit().transition().duration(durationForExit).style("opacity", 0);
+    };
+    ChartInternal.prototype.redrawBar = function (drawBar, withTransition, transition) {
+        return [(withTransition ? this.mainBar.transition(transition) : this.mainBar).attr('d', drawBar).style("stroke", this.color).style("fill", this.color).style("opacity", 1)];
+    };
+    ChartInternal.prototype.getBarW = function (axis, barTargetsNum) {
+        var $$ = this,
+            config = $$.config,
+            w = typeof config.bar_width === 'number' ? config.bar_width : barTargetsNum ? axis.tickInterval() * config.bar_width_ratio / barTargetsNum : 0;
+        return config.bar_width_max && w > config.bar_width_max ? config.bar_width_max : w;
+    };
+    ChartInternal.prototype.getBars = function (i, id) {
+        var $$ = this;
+        return (id ? $$.main.selectAll('.' + CLASS.bars + $$.getTargetSelectorSuffix(id)) : $$.main).selectAll('.' + CLASS.bar + (isValue(i) ? '-' + i : ''));
+    };
+    ChartInternal.prototype.expandBars = function (i, id, reset) {
+        var $$ = this;
+        if (reset) {
+            $$.unexpandBars();
+        }
+        $$.getBars(i, id).classed(CLASS.EXPANDED, true);
+    };
+    ChartInternal.prototype.unexpandBars = function (i) {
+        var $$ = this;
+        $$.getBars(i).classed(CLASS.EXPANDED, false);
+    };
+    ChartInternal.prototype.generateDrawBar = function (barIndices, isSub) {
+        var $$ = this,
+            config = $$.config,
+            getPoints = $$.generateGetBarPoints(barIndices, isSub);
+        return function (d, i) {
+            // 4 points that make a bar
+            var points = getPoints(d, i);
+
+            // switch points if axis is rotated, not applicable for sub chart
+            var indexX = config.axis_rotated ? 1 : 0;
+            var indexY = config.axis_rotated ? 0 : 1;
+
+            var path = 'M ' + points[0][indexX] + ',' + points[0][indexY] + ' ' + 'L' + points[1][indexX] + ',' + points[1][indexY] + ' ' + 'L' + points[2][indexX] + ',' + points[2][indexY] + ' ' + 'L' + points[3][indexX] + ',' + points[3][indexY] + ' ' + 'z';
+
+            return path;
+        };
+    };
+    ChartInternal.prototype.generateGetBarPoints = function (barIndices, isSub) {
+        var $$ = this,
+            axis = isSub ? $$.subXAxis : $$.xAxis,
+            barTargetsNum = barIndices.__max__ + 1,
+            barW = $$.getBarW(axis, barTargetsNum),
+            barX = $$.getShapeX(barW, barTargetsNum, barIndices, !!isSub),
+            barY = $$.getShapeY(!!isSub),
+            barOffset = $$.getShapeOffset($$.isBarType, barIndices, !!isSub),
+            barSpaceOffset = barW * ($$.config.bar_space / 2),
+            yScale = isSub ? $$.getSubYScale : $$.getYScale;
+        return function (d, i) {
+            var y0 = yScale.call($$, d.id)(0),
+                offset = barOffset(d, i) || y0,
+                // offset is for stacked bar chart
+            posX = barX(d),
+                posY = barY(d);
+            // fix posY not to overflow opposite quadrant
+            if ($$.config.axis_rotated) {
+                if (0 < d.value && posY < y0 || d.value < 0 && y0 < posY) {
+                    posY = y0;
+                }
+            }
+            // 4 points that make a bar
+            return [[posX + barSpaceOffset, offset], [posX + barSpaceOffset, posY - (y0 - offset)], [posX + barW - barSpaceOffset, posY - (y0 - offset)], [posX + barW - barSpaceOffset, offset]];
+        };
+    };
+    ChartInternal.prototype.isWithinBar = function (mouse, that) {
+        var box = that.getBoundingClientRect(),
+            seg0 = that.pathSegList.getItem(0),
+            seg1 = that.pathSegList.getItem(1),
+            x = Math.min(seg0.x, seg1.x),
+            y = Math.min(seg0.y, seg1.y),
+            w = box.width,
+            h = box.height,
+            offset = 2,
+            sx = x - offset,
+            ex = x + w + offset,
+            sy = y + h + offset,
+            ey = y - offset;
+        return sx < mouse[0] && mouse[0] < ex && ey < mouse[1] && mouse[1] < sy;
+    };
+
+    ChartInternal.prototype.getShapeIndices = function (typeFilter) {
+        var $$ = this,
+            config = $$.config,
+            indices = {},
+            i = 0,
+            j,
+            k;
+        $$.filterTargetsToShow($$.data.targets.filter(typeFilter, $$)).forEach(function (d) {
+            for (j = 0; j < config.data_groups.length; j++) {
+                if (config.data_groups[j].indexOf(d.id) < 0) {
+                    continue;
+                }
+                for (k = 0; k < config.data_groups[j].length; k++) {
+                    if (config.data_groups[j][k] in indices) {
+                        indices[d.id] = indices[config.data_groups[j][k]];
+                        break;
+                    }
+                }
+            }
+            if (isUndefined(indices[d.id])) {
+                indices[d.id] = i++;
+            }
+        });
+        indices.__max__ = i - 1;
+        return indices;
+    };
+    ChartInternal.prototype.getShapeX = function (offset, targetsNum, indices, isSub) {
+        var $$ = this,
+            scale = isSub ? $$.subX : $$.x;
+        return function (d) {
+            var index = d.id in indices ? indices[d.id] : 0;
+            return d.x || d.x === 0 ? scale(d.x) - offset * (targetsNum / 2 - index) : 0;
+        };
+    };
+    ChartInternal.prototype.getShapeY = function (isSub) {
+        var $$ = this;
+        return function (d) {
+            var scale = isSub ? $$.getSubYScale(d.id) : $$.getYScale(d.id);
+            return scale(d.value);
+        };
+    };
+    ChartInternal.prototype.getShapeOffset = function (typeFilter, indices, isSub) {
+        var $$ = this,
+            targets = $$.orderTargets($$.filterTargetsToShow($$.data.targets.filter(typeFilter, $$))),
+            targetIds = targets.map(function (t) {
+            return t.id;
+        });
+        return function (d, i) {
+            var scale = isSub ? $$.getSubYScale(d.id) : $$.getYScale(d.id),
+                y0 = scale(0),
+                offset = y0;
+            targets.forEach(function (t) {
+                var values = $$.isStepType(d) ? $$.convertValuesToStep(t.values) : t.values;
+                if (t.id === d.id || indices[t.id] !== indices[d.id]) {
+                    return;
+                }
+                if (targetIds.indexOf(t.id) < targetIds.indexOf(d.id)) {
+                    // check if the x values line up
+                    if (typeof values[i] === 'undefined' || +values[i].x !== +d.x) {
+                        // "+" for timeseries
+                        // if not, try to find the value that does line up
+                        i = -1;
+                        values.forEach(function (v, j) {
+                            if (v.x === d.x) {
+                                i = j;
+                            }
+                        });
+                    }
+                    if (i in values && values[i].value * d.value >= 0) {
+                        offset += scale(values[i].value) - y0;
+                    }
+                }
+            });
+            return offset;
+        };
+    };
+    ChartInternal.prototype.isWithinShape = function (that, d) {
+        var $$ = this,
+            shape = $$.d3.select(that),
+            isWithin;
+        if (!$$.isTargetToShow(d.id)) {
+            isWithin = false;
+        } else if (that.nodeName === 'circle') {
+            isWithin = $$.isStepType(d) ? $$.isWithinStep(that, $$.getYScale(d.id)(d.value)) : $$.isWithinCircle(that, $$.pointSelectR(d) * 1.5);
+        } else if (that.nodeName === 'path') {
+            isWithin = shape.classed(CLASS.bar) ? $$.isWithinBar($$.d3.mouse(that), that) : true;
+        }
+        return isWithin;
+    };
+
+    ChartInternal.prototype.getInterpolate = function (d) {
+        var $$ = this,
+            d3 = $$.d3,
+            types = {
+            'linear': d3.curveLinear,
+            'linear-closed': d3.curveLinearClosed,
+            'basis': d3.curveBasis,
+            'basis-open': d3.curveBasisOpen,
+            'basis-closed': d3.curveBasisClosed,
+            'bundle': d3.curveBundle,
+            'cardinal': d3.curveCardinal,
+            'cardinal-open': d3.curveCardinalOpen,
+            'cardinal-closed': d3.curveCardinalClosed,
+            'monotone': d3.curveMonotoneX,
+            'step': d3.curveStep,
+            'step-before': d3.curveStepBefore,
+            'step-after': d3.curveStepAfter
+        },
+            type;
+
+        if ($$.isSplineType(d)) {
+            type = types[$$.config.spline_interpolation_type] || types.cardinal;
+        } else if ($$.isStepType(d)) {
+            type = types[$$.config.line_step_type];
+        } else {
+            type = types.linear;
+        }
+        return type;
+    };
+
+    ChartInternal.prototype.initLine = function () {
+        var $$ = this;
+        $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartLines);
+    };
+    ChartInternal.prototype.updateTargetsForLine = function (targets) {
+        var $$ = this,
+            config = $$.config,
+            mainLines,
+            mainLineEnter,
+            classChartLine = $$.classChartLine.bind($$),
+            classLines = $$.classLines.bind($$),
+            classAreas = $$.classAreas.bind($$),
+            classCircles = $$.classCircles.bind($$),
+            classFocus = $$.classFocus.bind($$);
+        mainLines = $$.main.select('.' + CLASS.chartLines).selectAll('.' + CLASS.chartLine).data(targets).attr('class', function (d) {
+            return classChartLine(d) + classFocus(d);
+        });
+        mainLineEnter = mainLines.enter().append('g').attr('class', classChartLine).style('opacity', 0).style("pointer-events", "none");
+        // Lines for each data
+        mainLineEnter.append('g').attr("class", classLines);
+        // Areas
+        mainLineEnter.append('g').attr('class', classAreas);
+        // Circles for each data point on lines
+        mainLineEnter.append('g').attr("class", function (d) {
+            return $$.generateClass(CLASS.selectedCircles, d.id);
+        });
+        mainLineEnter.append('g').attr("class", classCircles).style("cursor", function (d) {
+            return config.data_selection_isselectable(d) ? "pointer" : null;
+        });
+        // Update date for selected circles
+        targets.forEach(function (t) {
+            $$.main.selectAll('.' + CLASS.selectedCircles + $$.getTargetSelectorSuffix(t.id)).selectAll('.' + CLASS.selectedCircle).each(function (d) {
+                d.value = t.values[d.index].value;
+            });
+        });
+        // MEMO: can not keep same color...
+        //mainLineUpdate.exit().remove();
+    };
+    ChartInternal.prototype.updateLine = function (durationForExit) {
+        var $$ = this;
+        var mainLine = $$.main.selectAll('.' + CLASS.lines).selectAll('.' + CLASS.line).data($$.lineData.bind($$));
+        var mainLineEnter = mainLine.enter().append('path').attr('class', $$.classLine.bind($$)).style("stroke", $$.color);
+        $$.mainLine = mainLineEnter.merge(mainLine).style("opacity", $$.initialOpacity.bind($$)).style('shape-rendering', function (d) {
+            return $$.isStepType(d) ? 'crispEdges' : '';
+        }).attr('transform', null);
+        mainLine.exit().transition().duration(durationForExit).style('opacity', 0);
+    };
+    ChartInternal.prototype.redrawLine = function (drawLine, withTransition, transition) {
+        return [(withTransition ? this.mainLine.transition(transition) : this.mainLine).attr("d", drawLine).style("stroke", this.color).style("opacity", 1)];
+    };
+    ChartInternal.prototype.generateDrawLine = function (lineIndices, isSub) {
+        var $$ = this,
+            config = $$.config,
+            line = $$.d3.line(),
+            getPoints = $$.generateGetLinePoints(lineIndices, isSub),
+            yScaleGetter = isSub ? $$.getSubYScale : $$.getYScale,
+            xValue = function xValue(d) {
+            return (isSub ? $$.subxx : $$.xx).call($$, d);
+        },
+            yValue = function yValue(d, i) {
+            return config.data_groups.length > 0 ? getPoints(d, i)[0][1] : yScaleGetter.call($$, d.id)(d.value);
+        };
+
+        line = config.axis_rotated ? line.x(yValue).y(xValue) : line.x(xValue).y(yValue);
+        if (!config.line_connectNull) {
+            line = line.defined(function (d) {
+                return d.value != null;
+            });
+        }
+        return function (d) {
+            var values = config.line_connectNull ? $$.filterRemoveNull(d.values) : d.values,
+                x = isSub ? $$.subX : $$.x,
+                y = yScaleGetter.call($$, d.id),
+                x0 = 0,
+                y0 = 0,
+                path;
+            if ($$.isLineType(d)) {
+                if (config.data_regions[d.id]) {
+                    path = $$.lineWithRegions(values, x, y, config.data_regions[d.id]);
+                } else {
+                    if ($$.isStepType(d)) {
+                        values = $$.convertValuesToStep(values);
+                    }
+                    path = line.curve($$.getInterpolate(d))(values);
+                }
+            } else {
+                if (values[0]) {
+                    x0 = x(values[0].x);
+                    y0 = y(values[0].value);
+                }
+                path = config.axis_rotated ? "M " + y0 + " " + x0 : "M " + x0 + " " + y0;
+            }
+            return path ? path : "M 0 0";
+        };
+    };
+    ChartInternal.prototype.generateGetLinePoints = function (lineIndices, isSub) {
+        // partial duplication of generateGetBarPoints
+        var $$ = this,
+            config = $$.config,
+            lineTargetsNum = lineIndices.__max__ + 1,
+            x = $$.getShapeX(0, lineTargetsNum, lineIndices, !!isSub),
+            y = $$.getShapeY(!!isSub),
+            lineOffset = $$.getShapeOffset($$.isLineType, lineIndices, !!isSub),
+            yScale = isSub ? $$.getSubYScale : $$.getYScale;
+        return function (d, i) {
+            var y0 = yScale.call($$, d.id)(0),
+                offset = lineOffset(d, i) || y0,
+                // offset is for stacked area chart
+            posX = x(d),
+                posY = y(d);
+            // fix posY not to overflow opposite quadrant
+            if (config.axis_rotated) {
+                if (0 < d.value && posY < y0 || d.value < 0 && y0 < posY) {
+                    posY = y0;
+                }
+            }
+            // 1 point that marks the line position
+            return [[posX, posY - (y0 - offset)], [posX, posY - (y0 - offset)], // needed for compatibility
+            [posX, posY - (y0 - offset)], // needed for compatibility
+            [posX, posY - (y0 - offset)] // needed for compatibility
+            ];
+        };
+    };
+
+    ChartInternal.prototype.lineWithRegions = function (d, x, y, _regions) {
+        var $$ = this,
+            config = $$.config,
+            prev = -1,
+            i,
+            j,
+            s = "M",
+            sWithRegion,
+            xp,
+            yp,
+            dx,
+            dy,
+            dd,
+            diff,
+            diffx2,
+            xOffset = $$.isCategorized() ? 0.5 : 0,
+            xValue,
+            yValue,
+            regions = [];
+
+        function isWithinRegions(x, regions) {
+            var i;
+            for (i = 0; i < regions.length; i++) {
+                if (regions[i].start < x && x <= regions[i].end) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        // Check start/end of regions
+        if (isDefined(_regions)) {
+            for (i = 0; i < _regions.length; i++) {
+                regions[i] = {};
+                if (isUndefined(_regions[i].start)) {
+                    regions[i].start = d[0].x;
+                } else {
+                    regions[i].start = $$.isTimeSeries() ? $$.parseDate(_regions[i].start) : _regions[i].start;
+                }
+                if (isUndefined(_regions[i].end)) {
+                    regions[i].end = d[d.length - 1].x;
+                } else {
+                    regions[i].end = $$.isTimeSeries() ? $$.parseDate(_regions[i].end) : _regions[i].end;
+                }
+            }
+        }
+
+        // Set scales
+        xValue = config.axis_rotated ? function (d) {
+            return y(d.value);
+        } : function (d) {
+            return x(d.x);
+        };
+        yValue = config.axis_rotated ? function (d) {
+            return x(d.x);
+        } : function (d) {
+            return y(d.value);
+        };
+
+        // Define svg generator function for region
+        function generateM(points) {
+            return 'M' + points[0][0] + ' ' + points[0][1] + ' ' + points[1][0] + ' ' + points[1][1];
+        }
+        if ($$.isTimeSeries()) {
+            sWithRegion = function sWithRegion(d0, d1, j, diff) {
+                var x0 = d0.x.getTime(),
+                    x_diff = d1.x - d0.x,
+                    xv0 = new Date(x0 + x_diff * j),
+                    xv1 = new Date(x0 + x_diff * (j + diff)),
+                    points;
+                if (config.axis_rotated) {
+                    points = [[y(yp(j)), x(xv0)], [y(yp(j + diff)), x(xv1)]];
+                } else {
+                    points = [[x(xv0), y(yp(j))], [x(xv1), y(yp(j + diff))]];
+                }
+                return generateM(points);
+            };
+        } else {
+            sWithRegion = function sWithRegion(d0, d1, j, diff) {
+                var points;
+                if (config.axis_rotated) {
+                    points = [[y(yp(j), true), x(xp(j))], [y(yp(j + diff), true), x(xp(j + diff))]];
+                } else {
+                    points = [[x(xp(j), true), y(yp(j))], [x(xp(j + diff), true), y(yp(j + diff))]];
+                }
+                return generateM(points);
+            };
+        }
+
+        // Generate
+        for (i = 0; i < d.length; i++) {
+
+            // Draw as normal
+            if (isUndefined(regions) || !isWithinRegions(d[i].x, regions)) {
+                s += " " + xValue(d[i]) + " " + yValue(d[i]);
+            }
+            // Draw with region // TODO: Fix for horizotal charts
+            else {
+                    xp = $$.getScale(d[i - 1].x + xOffset, d[i].x + xOffset, $$.isTimeSeries());
+                    yp = $$.getScale(d[i - 1].value, d[i].value);
+
+                    dx = x(d[i].x) - x(d[i - 1].x);
+                    dy = y(d[i].value) - y(d[i - 1].value);
+                    dd = Math.sqrt(Math.pow(dx, 2) + Math.pow(dy, 2));
+                    diff = 2 / dd;
+                    diffx2 = diff * 2;
+
+                    for (j = diff; j <= 1; j += diffx2) {
+                        s += sWithRegion(d[i - 1], d[i], j, diff);
+                    }
+                }
+            prev = d[i].x;
+        }
+
+        return s;
+    };
+
+    ChartInternal.prototype.updateArea = function (durationForExit) {
+        var $$ = this,
+            d3 = $$.d3;
+        var mainArea = $$.main.selectAll('.' + CLASS.areas).selectAll('.' + CLASS.area).data($$.lineData.bind($$));
+        var mainAreaEnter = mainArea.enter().append('path').attr("class", $$.classArea.bind($$)).style("fill", $$.color).style("opacity", function () {
+            $$.orgAreaOpacity = +d3.select(this).style('opacity');return 0;
+        });
+        $$.mainArea = mainAreaEnter.merge(mainArea).style("opacity", $$.orgAreaOpacity);
+        mainArea.exit().transition().duration(durationForExit).style('opacity', 0);
+    };
+    ChartInternal.prototype.redrawArea = function (drawArea, withTransition, transition) {
+        return [(withTransition ? this.mainArea.transition(transition) : this.mainArea).attr("d", drawArea).style("fill", this.color).style("opacity", this.orgAreaOpacity)];
+    };
+    ChartInternal.prototype.generateDrawArea = function (areaIndices, isSub) {
+        var $$ = this,
+            config = $$.config,
+            area = $$.d3.area(),
+            getPoints = $$.generateGetAreaPoints(areaIndices, isSub),
+            yScaleGetter = isSub ? $$.getSubYScale : $$.getYScale,
+            xValue = function xValue(d) {
+            return (isSub ? $$.subxx : $$.xx).call($$, d);
+        },
+            value0 = function value0(d, i) {
+            return config.data_groups.length > 0 ? getPoints(d, i)[0][1] : yScaleGetter.call($$, d.id)($$.getAreaBaseValue(d.id));
+        },
+            value1 = function value1(d, i) {
+            return config.data_groups.length > 0 ? getPoints(d, i)[1][1] : yScaleGetter.call($$, d.id)(d.value);
+        };
+
+        area = config.axis_rotated ? area.x0(value0).x1(value1).y(xValue) : area.x(xValue).y0(config.area_above ? 0 : value0).y1(value1);
+        if (!config.line_connectNull) {
+            area = area.defined(function (d) {
+                return d.value !== null;
+            });
+        }
+
+        return function (d) {
+            var values = config.line_connectNull ? $$.filterRemoveNull(d.values) : d.values,
+                x0 = 0,
+                y0 = 0,
+                path;
+            if ($$.isAreaType(d)) {
+                if ($$.isStepType(d)) {
+                    values = $$.convertValuesToStep(values);
+                }
+                path = area.curve($$.getInterpolate(d))(values);
+            } else {
+                if (values[0]) {
+                    x0 = $$.x(values[0].x);
+                    y0 = $$.getYScale(d.id)(values[0].value);
+                }
+                path = config.axis_rotated ? "M " + y0 + " " + x0 : "M " + x0 + " " + y0;
+            }
+            return path ? path : "M 0 0";
+        };
+    };
+    ChartInternal.prototype.getAreaBaseValue = function () {
+        return 0;
+    };
+    ChartInternal.prototype.generateGetAreaPoints = function (areaIndices, isSub) {
+        // partial duplication of generateGetBarPoints
+        var $$ = this,
+            config = $$.config,
+            areaTargetsNum = areaIndices.__max__ + 1,
+            x = $$.getShapeX(0, areaTargetsNum, areaIndices, !!isSub),
+            y = $$.getShapeY(!!isSub),
+            areaOffset = $$.getShapeOffset($$.isAreaType, areaIndices, !!isSub),
+            yScale = isSub ? $$.getSubYScale : $$.getYScale;
+        return function (d, i) {
+            var y0 = yScale.call($$, d.id)(0),
+                offset = areaOffset(d, i) || y0,
+                // offset is for stacked area chart
+            posX = x(d),
+                posY = y(d);
+            // fix posY not to overflow opposite quadrant
+            if (config.axis_rotated) {
+                if (0 < d.value && posY < y0 || d.value < 0 && y0 < posY) {
+                    posY = y0;
+                }
+            }
+            // 1 point that marks the area position
+            return [[posX, offset], [posX, posY - (y0 - offset)], [posX, posY - (y0 - offset)], // needed for compatibility
+            [posX, offset] // needed for compatibility
+            ];
+        };
+    };
+
+    ChartInternal.prototype.updateCircle = function (cx, cy) {
+        var $$ = this;
+        var mainCircle = $$.main.selectAll('.' + CLASS.circles).selectAll('.' + CLASS.circle).data($$.lineOrScatterData.bind($$));
+        var mainCircleEnter = mainCircle.enter().append("circle").attr("class", $$.classCircle.bind($$)).attr("cx", cx).attr("cy", cy).attr("r", $$.pointR.bind($$)).style("fill", $$.color);
+        $$.mainCircle = mainCircleEnter.merge(mainCircle).style("opacity", $$.initialOpacityForCircle.bind($$));
+        mainCircle.exit().style("opacity", 0);
+    };
+    ChartInternal.prototype.redrawCircle = function (cx, cy, withTransition, transition) {
+        var $$ = this,
+            selectedCircles = $$.main.selectAll('.' + CLASS.selectedCircle);
+        return [(withTransition ? $$.mainCircle.transition(transition) : $$.mainCircle).style('opacity', this.opacityForCircle.bind($$)).style("fill", $$.color).attr("cx", cx).attr("cy", cy), (withTransition ? selectedCircles.transition(transition) : selectedCircles).attr("cx", cx).attr("cy", cy)];
+    };
+    ChartInternal.prototype.circleX = function (d) {
+        return d.x || d.x === 0 ? this.x(d.x) : null;
+    };
+    ChartInternal.prototype.updateCircleY = function () {
+        var $$ = this,
+            lineIndices,
+            getPoints;
+        if ($$.config.data_groups.length > 0) {
+            lineIndices = $$.getShapeIndices($$.isLineType), getPoints = $$.generateGetLinePoints(lineIndices);
+            $$.circleY = function (d, i) {
+                return getPoints(d, i)[0][1];
+            };
+        } else {
+            $$.circleY = function (d) {
+                return $$.getYScale(d.id)(d.value);
+            };
+        }
+    };
+    ChartInternal.prototype.getCircles = function (i, id) {
+        var $$ = this;
+        return (id ? $$.main.selectAll('.' + CLASS.circles + $$.getTargetSelectorSuffix(id)) : $$.main).selectAll('.' + CLASS.circle + (isValue(i) ? '-' + i : ''));
+    };
+    ChartInternal.prototype.expandCircles = function (i, id, reset) {
+        var $$ = this,
+            r = $$.pointExpandedR.bind($$);
+        if (reset) {
+            $$.unexpandCircles();
+        }
+        $$.getCircles(i, id).classed(CLASS.EXPANDED, true).attr('r', r);
+    };
+    ChartInternal.prototype.unexpandCircles = function (i) {
+        var $$ = this,
+            r = $$.pointR.bind($$);
+        $$.getCircles(i).filter(function () {
+            return $$.d3.select(this).classed(CLASS.EXPANDED);
+        }).classed(CLASS.EXPANDED, false).attr('r', r);
+    };
+    ChartInternal.prototype.pointR = function (d) {
+        var $$ = this,
+            config = $$.config;
+        return $$.isStepType(d) ? 0 : isFunction(config.point_r) ? config.point_r(d) : config.point_r;
+    };
+    ChartInternal.prototype.pointExpandedR = function (d) {
+        var $$ = this,
+            config = $$.config;
+        if (config.point_focus_expand_enabled) {
+            return isFunction(config.point_focus_expand_r) ? config.point_focus_expand_r(d) : config.point_focus_expand_r ? config.point_focus_expand_r : $$.pointR(d) * 1.75;
+        } else {
+            return $$.pointR(d);
+        }
+    };
+    ChartInternal.prototype.pointSelectR = function (d) {
+        var $$ = this,
+            config = $$.config;
+        return isFunction(config.point_select_r) ? config.point_select_r(d) : config.point_select_r ? config.point_select_r : $$.pointR(d) * 4;
+    };
+    ChartInternal.prototype.isWithinCircle = function (that, r) {
+        var d3 = this.d3,
+            mouse = d3.mouse(that),
+            d3_this = d3.select(that),
+            cx = +d3_this.attr("cx"),
+            cy = +d3_this.attr("cy");
+        return Math.sqrt(Math.pow(cx - mouse[0], 2) + Math.pow(cy - mouse[1], 2)) < r;
+    };
+    ChartInternal.prototype.isWithinStep = function (that, y) {
+        return Math.abs(y - this.d3.mouse(that)[1]) < 30;
+    };
+
+    ChartInternal.prototype.getCurrentWidth = function () {
+        var $$ = this,
+            config = $$.config;
+        return config.size_width ? config.size_width : $$.getParentWidth();
+    };
+    ChartInternal.prototype.getCurrentHeight = function () {
+        var $$ = this,
+            config = $$.config,
+            h = config.size_height ? config.size_height : $$.getParentHeight();
+        return h > 0 ? h : 320 / ($$.hasType('gauge') && !config.gauge_fullCircle ? 2 : 1);
+    };
+    ChartInternal.prototype.getCurrentPaddingTop = function () {
+        var $$ = this,
+            config = $$.config,
+            padding = isValue(config.padding_top) ? config.padding_top : 0;
+        if ($$.title && $$.title.node()) {
+            padding += $$.getTitlePadding();
+        }
+        return padding;
+    };
+    ChartInternal.prototype.getCurrentPaddingBottom = function () {
+        var config = this.config;
+        return isValue(config.padding_bottom) ? config.padding_bottom : 0;
+    };
+    ChartInternal.prototype.getCurrentPaddingLeft = function (withoutRecompute) {
+        var $$ = this,
+            config = $$.config;
+        if (isValue(config.padding_left)) {
+            return config.padding_left;
+        } else if (config.axis_rotated) {
+            return !config.axis_x_show || config.axis_x_inner ? 1 : Math.max(ceil10($$.getAxisWidthByAxisId('x', withoutRecompute)), 40);
+        } else if (!config.axis_y_show || config.axis_y_inner) {
+            // && !config.axis_rotated
+            return $$.axis.getYAxisLabelPosition().isOuter ? 30 : 1;
+        } else {
+            return ceil10($$.getAxisWidthByAxisId('y', withoutRecompute));
+        }
+    };
+    ChartInternal.prototype.getCurrentPaddingRight = function () {
+        var $$ = this,
+            config = $$.config,
+            defaultPadding = 10,
+            legendWidthOnRight = $$.isLegendRight ? $$.getLegendWidth() + 20 : 0;
+        if (isValue(config.padding_right)) {
+            return config.padding_right + 1; // 1 is needed not to hide tick line
+        } else if (config.axis_rotated) {
+            return defaultPadding + legendWidthOnRight;
+        } else if (!config.axis_y2_show || config.axis_y2_inner) {
+            // && !config.axis_rotated
+            return 2 + legendWidthOnRight + ($$.axis.getY2AxisLabelPosition().isOuter ? 20 : 0);
+        } else {
+            return ceil10($$.getAxisWidthByAxisId('y2')) + legendWidthOnRight;
+        }
+    };
+
+    ChartInternal.prototype.getParentRectValue = function (key) {
+        var parent = this.selectChart.node(),
+            v;
+        while (parent && parent.tagName !== 'BODY') {
+            try {
+                v = parent.getBoundingClientRect()[key];
+            } catch (e) {
+                if (key === 'width') {
+                    // In IE in certain cases getBoundingClientRect
+                    // will cause an "unspecified error"
+                    v = parent.offsetWidth;
+                }
+            }
+            if (v) {
+                break;
+            }
+            parent = parent.parentNode;
+        }
+        return v;
+    };
+    ChartInternal.prototype.getParentWidth = function () {
+        return this.getParentRectValue('width');
+    };
+    ChartInternal.prototype.getParentHeight = function () {
+        var h = this.selectChart.style('height');
+        return h.indexOf('px') > 0 ? +h.replace('px', '') : 0;
+    };
+
+    ChartInternal.prototype.getSvgLeft = function (withoutRecompute) {
+        var $$ = this,
+            config = $$.config,
+            hasLeftAxisRect = config.axis_rotated || !config.axis_rotated && !config.axis_y_inner,
+            leftAxisClass = config.axis_rotated ? CLASS.axisX : CLASS.axisY,
+            leftAxis = $$.main.select('.' + leftAxisClass).node(),
+            svgRect = leftAxis && hasLeftAxisRect ? leftAxis.getBoundingClientRect() : { right: 0 },
+            chartRect = $$.selectChart.node().getBoundingClientRect(),
+            hasArc = $$.hasArcType(),
+            svgLeft = svgRect.right - chartRect.left - (hasArc ? 0 : $$.getCurrentPaddingLeft(withoutRecompute));
+        return svgLeft > 0 ? svgLeft : 0;
+    };
+
+    ChartInternal.prototype.getAxisWidthByAxisId = function (id, withoutRecompute) {
+        var $$ = this,
+            position = $$.axis.getLabelPositionById(id);
+        return $$.axis.getMaxTickWidth(id, withoutRecompute) + (position.isInner ? 20 : 40);
+    };
+    ChartInternal.prototype.getHorizontalAxisHeight = function (axisId) {
+        var $$ = this,
+            config = $$.config,
+            h = 30;
+        if (axisId === 'x' && !config.axis_x_show) {
+            return 8;
+        }
+        if (axisId === 'x' && config.axis_x_height) {
+            return config.axis_x_height;
+        }
+        if (axisId === 'y' && !config.axis_y_show) {
+            return config.legend_show && !$$.isLegendRight && !$$.isLegendInset ? 10 : 1;
+        }
+        if (axisId === 'y2' && !config.axis_y2_show) {
+            return $$.rotated_padding_top;
+        }
+        // Calculate x axis height when tick rotated
+        if (axisId === 'x' && !config.axis_rotated && config.axis_x_tick_rotate) {
+            h = 30 + $$.axis.getMaxTickWidth(axisId) * Math.cos(Math.PI * (90 - Math.abs(config.axis_x_tick_rotate)) / 180);
+        }
+        // Calculate y axis height when tick rotated
+        if (axisId === 'y' && config.axis_rotated && config.axis_y_tick_rotate) {
+            h = 30 + $$.axis.getMaxTickWidth(axisId) * Math.cos(Math.PI * (90 - Math.abs(config.axis_y_tick_rotate)) / 180);
+        }
+        return h + ($$.axis.getLabelPositionById(axisId).isInner ? 0 : 10) + (axisId === 'y2' ? -10 : 0);
+    };
+
+    ChartInternal.prototype.initBrush = function (scale) {
+        var $$ = this,
+            d3 = $$.d3;
+        // TODO: dynamically change brushY/brushX according to axis_rotated.
+        $$.brush = ($$.config.axis_rotated ? d3.brushY() : d3.brushX()).on("brush", function () {
+            var event = d3.event.sourceEvent;
+            if (event && event.type === "zoom") {
+                return;
+            }
+            $$.redrawForBrush();
+        }).on("end", function () {
+            var event = d3.event.sourceEvent;
+            if (event && event.type === "zoom") {
+                return;
+            }
+            if ($$.brush.empty() && event && event.type !== 'end') {
+                $$.brush.clear();
+            }
+        });
+        $$.brush.updateExtent = function () {
+            var range = this.scale.range(),
+                extent;
+            if ($$.config.axis_rotated) {
+                extent = [[0, range[0]], [$$.width2, range[1]]];
+            } else {
+                extent = [[range[0], 0], [range[1], $$.height2]];
+            }
+            this.extent(extent);
+            return this;
+        };
+        $$.brush.updateScale = function (scale) {
+            this.scale = scale;
+            return this;
+        };
+        $$.brush.update = function (scale) {
+            this.updateScale(scale || $$.subX).updateExtent();
+            $$.context.select('.' + CLASS.brush).call(this);
+        };
+        $$.brush.clear = function () {
+            $$.context.select('.' + CLASS.brush).call($$.brush.move, null);
+        };
+        $$.brush.selection = function () {
+            return d3.brushSelection($$.context.select('.' + CLASS.brush).node());
+        };
+        $$.brush.selectionAsValue = function (selectionAsValue, withTransition) {
+            var selection, brush;
+            if (selectionAsValue) {
+                if ($$.context) {
+                    selection = [this.scale(selectionAsValue[0]), this.scale(selectionAsValue[1])];
+                    brush = $$.context.select('.' + CLASS.brush);
+                    if (withTransition) {
+                        brush = brush.transition();
+                    }
+                    $$.brush.move(brush, selection);
+                }
+                return [];
+            }
+            selection = $$.brush.selection() || [0, 0];
+            return [this.scale.invert(selection[0]), this.scale.invert(selection[1])];
+        };
+        $$.brush.empty = function () {
+            var selection = $$.brush.selection();
+            return !selection || selection[0] === selection[1];
+        };
+        return $$.brush.updateScale(scale);
+    };
+    ChartInternal.prototype.initSubchart = function () {
+        var $$ = this,
+            config = $$.config,
+            context = $$.context = $$.svg.append("g").attr("transform", $$.getTranslate('context')),
+            visibility = config.subchart_show ? 'visible' : 'hidden';
+
+        // set style
+        context.style('visibility', visibility);
+
+        // Define g for chart area
+        context.append('g').attr("clip-path", $$.clipPathForSubchart).attr('class', CLASS.chart);
+
+        // Define g for bar chart area
+        context.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartBars);
+
+        // Define g for line chart area
+        context.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartLines);
+
+        // Add extent rect for Brush
+        context.append("g").attr("clip-path", $$.clipPath).attr("class", CLASS.brush);
+
+        // ATTENTION: This must be called AFTER chart added
+        // Add Axis
+        $$.axes.subx = context.append("g").attr("class", CLASS.axisX).attr("transform", $$.getTranslate('subx')).attr("clip-path", config.axis_rotated ? "" : $$.clipPathForXAxis);
+    };
+    ChartInternal.prototype.initSubchartBrush = function () {
+        var $$ = this;
+        // Add extent rect for Brush
+        $$.initBrush($$.subX).updateExtent();
+        $$.context.select('.' + CLASS.brush).call($$.brush);
+    };
+    ChartInternal.prototype.updateTargetsForSubchart = function (targets) {
+        var $$ = this,
+            context = $$.context,
+            config = $$.config,
+            contextLineEnter,
+            contextLine,
+            contextBarEnter,
+            contextBar,
+            classChartBar = $$.classChartBar.bind($$),
+            classBars = $$.classBars.bind($$),
+            classChartLine = $$.classChartLine.bind($$),
+            classLines = $$.classLines.bind($$),
+            classAreas = $$.classAreas.bind($$);
+
+        if (config.subchart_show) {
+            //-- Bar --//
+            contextBar = context.select('.' + CLASS.chartBars).selectAll('.' + CLASS.chartBar).data(targets);
+            contextBarEnter = contextBar.enter().append('g').style('opacity', 0);
+            contextBarEnter.merge(contextBar).attr('class', classChartBar);
+            // Bars for each data
+            contextBarEnter.append('g').attr("class", classBars);
+
+            //-- Line --//
+            contextLine = context.select('.' + CLASS.chartLines).selectAll('.' + CLASS.chartLine).data(targets);
+            contextLineEnter = contextLine.enter().append('g').style('opacity', 0);
+            contextLineEnter.merge(contextLine).attr('class', classChartLine);
+            // Lines for each data
+            contextLineEnter.append("g").attr("class", classLines);
+            // Area
+            contextLineEnter.append("g").attr("class", classAreas);
+
+            //-- Brush --//
+            context.selectAll('.' + CLASS.brush + ' rect').attr(config.axis_rotated ? "width" : "height", config.axis_rotated ? $$.width2 : $$.height2);
+        }
+    };
+    ChartInternal.prototype.updateBarForSubchart = function (durationForExit) {
+        var $$ = this;
+        var contextBar = $$.context.selectAll('.' + CLASS.bars).selectAll('.' + CLASS.bar).data($$.barData.bind($$));
+        var contextBarEnter = contextBar.enter().append('path').attr("class", $$.classBar.bind($$)).style("stroke", 'none').style("fill", $$.color);
+        contextBar.exit().transition().duration(durationForExit).style('opacity', 0).remove();
+        $$.contextBar = contextBarEnter.merge(contextBar).style("opacity", $$.initialOpacity.bind($$));
+    };
+    ChartInternal.prototype.redrawBarForSubchart = function (drawBarOnSub, withTransition, duration) {
+        (withTransition ? this.contextBar.transition(Math.random().toString()).duration(duration) : this.contextBar).attr('d', drawBarOnSub).style('opacity', 1);
+    };
+    ChartInternal.prototype.updateLineForSubchart = function (durationForExit) {
+        var $$ = this;
+        var contextLine = $$.context.selectAll('.' + CLASS.lines).selectAll('.' + CLASS.line).data($$.lineData.bind($$));
+        var contextLineEnter = contextLine.enter().append('path').attr('class', $$.classLine.bind($$)).style('stroke', $$.color);
+        contextLine.exit().transition().duration(durationForExit).style('opacity', 0).remove();
+        $$.contextLine = contextLineEnter.merge(contextLine).style("opacity", $$.initialOpacity.bind($$));
+    };
+    ChartInternal.prototype.redrawLineForSubchart = function (drawLineOnSub, withTransition, duration) {
+        (withTransition ? this.contextLine.transition(Math.random().toString()).duration(duration) : this.contextLine).attr("d", drawLineOnSub).style('opacity', 1);
+    };
+    ChartInternal.prototype.updateAreaForSubchart = function (durationForExit) {
+        var $$ = this,
+            d3 = $$.d3;
+        var contextArea = $$.context.selectAll('.' + CLASS.areas).selectAll('.' + CLASS.area).data($$.lineData.bind($$));
+        var contextAreaEnter = contextArea.enter().append('path').attr("class", $$.classArea.bind($$)).style("fill", $$.color).style("opacity", function () {
+            $$.orgAreaOpacity = +d3.select(this).style('opacity');return 0;
+        });
+        contextArea.exit().transition().duration(durationForExit).style('opacity', 0).remove();
+        $$.contextArea = contextAreaEnter.merge(contextArea).style("opacity", 0);
+    };
+    ChartInternal.prototype.redrawAreaForSubchart = function (drawAreaOnSub, withTransition, duration) {
+        (withTransition ? this.contextArea.transition(Math.random().toString()).duration(duration) : this.contextArea).attr("d", drawAreaOnSub).style("fill", this.color).style("opacity", this.orgAreaOpacity);
+    };
+    ChartInternal.prototype.redrawSubchart = function (withSubchart, transitions, duration, durationForExit, areaIndices, barIndices, lineIndices) {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config,
+            drawAreaOnSub,
+            drawBarOnSub,
+            drawLineOnSub;
+
+        $$.context.style('visibility', config.subchart_show ? 'visible' : 'hidden');
+
+        // subchart
+        if (config.subchart_show) {
+            // reflect main chart to extent on subchart if zoomed
+            if (d3.event && d3.event.type === 'zoom') {
+                $$.brush.selectionAsValue($$.x.orgDomain());
+            }
+            // update subchart elements if needed
+            if (withSubchart) {
+                // extent rect
+                if (!$$.brush.empty()) {
+                    $$.brush.selectionAsValue($$.x.orgDomain());
+                }
+                // setup drawer - MEMO: this must be called after axis updated
+                drawAreaOnSub = $$.generateDrawArea(areaIndices, true);
+                drawBarOnSub = $$.generateDrawBar(barIndices, true);
+                drawLineOnSub = $$.generateDrawLine(lineIndices, true);
+
+                $$.updateBarForSubchart(duration);
+                $$.updateLineForSubchart(duration);
+                $$.updateAreaForSubchart(duration);
+
+                $$.redrawBarForSubchart(drawBarOnSub, duration, duration);
+                $$.redrawLineForSubchart(drawLineOnSub, duration, duration);
+                $$.redrawAreaForSubchart(drawAreaOnSub, duration, duration);
+            }
+        }
+    };
+    ChartInternal.prototype.redrawForBrush = function () {
+        var $$ = this,
+            x = $$.x,
+            d3 = $$.d3,
+            s;
+        $$.redraw({
+            withTransition: false,
+            withY: $$.config.zoom_rescale,
+            withSubchart: false,
+            withUpdateXDomain: true,
+            withEventRect: false,
+            withDimension: false
+        });
+        // update zoom transation binded to event rect
+        s = d3.event.selection || $$.brush.scale.range();
+        $$.main.select('.' + CLASS.eventRect).call($$.zoom.transform, d3.zoomIdentity.scale($$.width / (s[1] - s[0])).translate(-s[0], 0));
+        $$.config.subchart_onbrush.call($$.api, x.orgDomain());
+    };
+    ChartInternal.prototype.transformContext = function (withTransition, transitions) {
+        var $$ = this,
+            subXAxis;
+        if (transitions && transitions.axisSubX) {
+            subXAxis = transitions.axisSubX;
+        } else {
+            subXAxis = $$.context.select('.' + CLASS.axisX);
+            if (withTransition) {
+                subXAxis = subXAxis.transition();
+            }
+        }
+        $$.context.attr("transform", $$.getTranslate('context'));
+        subXAxis.attr("transform", $$.getTranslate('subx'));
+    };
+    ChartInternal.prototype.getDefaultSelection = function () {
+        var $$ = this,
+            config = $$.config,
+            selection = isFunction(config.axis_x_selection) ? config.axis_x_selection($$.getXDomain($$.data.targets)) : config.axis_x_selection;
+        if ($$.isTimeSeries()) {
+            selection = [$$.parseDate(selection[0]), $$.parseDate(selection[1])];
+        }
+        return selection;
+    };
+
+    ChartInternal.prototype.initText = function () {
+        var $$ = this;
+        $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartTexts);
+        $$.mainText = $$.d3.selectAll([]);
+    };
+    ChartInternal.prototype.updateTargetsForText = function (targets) {
+        var $$ = this,
+            classChartText = $$.classChartText.bind($$),
+            classTexts = $$.classTexts.bind($$),
+            classFocus = $$.classFocus.bind($$);
+        var mainText = $$.main.select('.' + CLASS.chartTexts).selectAll('.' + CLASS.chartText).data(targets);
+        var mainTextEnter = mainText.enter().append('g').attr('class', classChartText).style('opacity', 0).style("pointer-events", "none");
+        mainTextEnter.append('g').attr('class', classTexts);
+        mainTextEnter.merge(mainText).attr('class', function (d) {
+            return classChartText(d) + classFocus(d);
+        });
+    };
+    ChartInternal.prototype.updateText = function (xForText, yForText, durationForExit) {
+        var $$ = this,
+            config = $$.config,
+            barOrLineData = $$.barOrLineData.bind($$),
+            classText = $$.classText.bind($$);
+        var mainText = $$.main.selectAll('.' + CLASS.texts).selectAll('.' + CLASS.text).data(barOrLineData);
+        var mainTextEnter = mainText.enter().append('text').attr("class", classText).attr('text-anchor', function (d) {
+            return config.axis_rotated ? d.value < 0 ? 'end' : 'start' : 'middle';
+        }).style("stroke", 'none').attr('x', xForText).attr('y', yForText).style("fill", function (d) {
+            return $$.color(d);
+        }).style("fill-opacity", 0);
+        $$.mainText = mainTextEnter.merge(mainText).text(function (d, i, j) {
+            return $$.dataLabelFormat(d.id)(d.value, d.id, i, j);
+        });
+        mainText.exit().transition().duration(durationForExit).style('fill-opacity', 0).remove();
+    };
+    ChartInternal.prototype.redrawText = function (xForText, yForText, forFlow, withTransition, transition) {
+        return [(withTransition ? this.mainText.transition(transition) : this.mainText).attr('x', xForText).attr('y', yForText).style("fill", this.color).style("fill-opacity", forFlow ? 0 : this.opacityForText.bind(this))];
+    };
+    ChartInternal.prototype.getTextRect = function (text, cls, element) {
+        var dummy = this.d3.select('body').append('div').classed('c3', true),
+            svg = dummy.append("svg").style('visibility', 'hidden').style('position', 'fixed').style('top', 0).style('left', 0),
+            font = this.d3.select(element).style('font'),
+            rect;
+        svg.selectAll('.dummy').data([text]).enter().append('text').classed(cls ? cls : "", true).style('font', font).text(text).each(function () {
+            rect = this.getBoundingClientRect();
+        });
+        dummy.remove();
+        return rect;
+    };
+    ChartInternal.prototype.generateXYForText = function (areaIndices, barIndices, lineIndices, forX) {
+        var $$ = this,
+            getAreaPoints = $$.generateGetAreaPoints(areaIndices, false),
+            getBarPoints = $$.generateGetBarPoints(barIndices, false),
+            getLinePoints = $$.generateGetLinePoints(lineIndices, false),
+            getter = forX ? $$.getXForText : $$.getYForText;
+        return function (d, i) {
+            var getPoints = $$.isAreaType(d) ? getAreaPoints : $$.isBarType(d) ? getBarPoints : getLinePoints;
+            return getter.call($$, getPoints(d, i), d, this);
+        };
+    };
+    ChartInternal.prototype.getXForText = function (points, d, textElement) {
+        var $$ = this,
+            box = textElement.getBoundingClientRect(),
+            xPos,
+            padding;
+        if ($$.config.axis_rotated) {
+            padding = $$.isBarType(d) ? 4 : 6;
+            xPos = points[2][1] + padding * (d.value < 0 ? -1 : 1);
+        } else {
+            xPos = $$.hasType('bar') ? (points[2][0] + points[0][0]) / 2 : points[0][0];
+        }
+        // show labels regardless of the domain if value is null
+        if (d.value === null) {
+            if (xPos > $$.width) {
+                xPos = $$.width - box.width;
+            } else if (xPos < 0) {
+                xPos = 4;
+            }
+        }
+        return xPos;
+    };
+    ChartInternal.prototype.getYForText = function (points, d, textElement) {
+        var $$ = this,
+            box = textElement.getBoundingClientRect(),
+            yPos;
+        if ($$.config.axis_rotated) {
+            yPos = (points[0][0] + points[2][0] + box.height * 0.6) / 2;
+        } else {
+            yPos = points[2][1];
+            if (d.value < 0 || d.value === 0 && !$$.hasPositiveValue) {
+                yPos += box.height;
+                if ($$.isBarType(d) && $$.isSafari()) {
+                    yPos -= 3;
+                } else if (!$$.isBarType(d) && $$.isChrome()) {
+                    yPos += 3;
+                }
+            } else {
+                yPos += $$.isBarType(d) ? -3 : -6;
+            }
+        }
+        // show labels regardless of the domain if value is null
+        if (d.value === null && !$$.config.axis_rotated) {
+            if (yPos < box.height) {
+                yPos = box.height;
+            } else if (yPos > this.height) {
+                yPos = this.height - 4;
+            }
+        }
+        return yPos;
+    };
+
+    ChartInternal.prototype.initTitle = function () {
+        var $$ = this;
+        $$.title = $$.svg.append("text").text($$.config.title_text).attr("class", $$.CLASS.title);
+    };
+    ChartInternal.prototype.redrawTitle = function () {
+        var $$ = this;
+        $$.title.attr("x", $$.xForTitle.bind($$)).attr("y", $$.yForTitle.bind($$));
+    };
+    ChartInternal.prototype.xForTitle = function () {
+        var $$ = this,
+            config = $$.config,
+            position = config.title_position || 'left',
+            x;
+        if (position.indexOf('right') >= 0) {
+            x = $$.currentWidth - $$.getTextRect($$.title.node().textContent, $$.CLASS.title, $$.title.node()).width - config.title_padding.right;
+        } else if (position.indexOf('center') >= 0) {
+            x = ($$.currentWidth - $$.getTextRect($$.title.node().textContent, $$.CLASS.title, $$.title.node()).width) / 2;
+        } else {
+            // left
+            x = config.title_padding.left;
+        }
+        return x;
+    };
+    ChartInternal.prototype.yForTitle = function () {
+        var $$ = this;
+        return $$.config.title_padding.top + $$.getTextRect($$.title.node().textContent, $$.CLASS.title, $$.title.node()).height;
+    };
+    ChartInternal.prototype.getTitlePadding = function () {
+        var $$ = this;
+        return $$.yForTitle() + $$.config.title_padding.bottom;
+    };
+
+    ChartInternal.prototype.initTooltip = function () {
+        var $$ = this,
+            config = $$.config,
+            i;
+        $$.tooltip = $$.selectChart.style("position", "relative").append("div").attr('class', CLASS.tooltipContainer).style("position", "absolute").style("pointer-events", "none").style("display", "none");
+        // Show tooltip if needed
+        if (config.tooltip_init_show) {
+            if ($$.isTimeSeries() && isString(config.tooltip_init_x)) {
+                config.tooltip_init_x = $$.parseDate(config.tooltip_init_x);
+                for (i = 0; i < $$.data.targets[0].values.length; i++) {
+                    if ($$.data.targets[0].values[i].x - config.tooltip_init_x === 0) {
+                        break;
+                    }
+                }
+                config.tooltip_init_x = i;
+            }
+            $$.tooltip.html(config.tooltip_contents.call($$, $$.data.targets.map(function (d) {
+                return $$.addName(d.values[config.tooltip_init_x]);
+            }), $$.axis.getXAxisTickFormat(), $$.getYFormat($$.hasArcType()), $$.color));
+            $$.tooltip.style("top", config.tooltip_init_position.top).style("left", config.tooltip_init_position.left).style("display", "block");
+        }
+    };
+    ChartInternal.prototype.getTooltipSortFunction = function () {
+        var $$ = this,
+            config = $$.config;
+
+        if (config.data_groups.length === 0 || config.tooltip_order !== undefined) {
+            // if data are not grouped or if an order is specified
+            // for the tooltip values we sort them by their values
+
+            var order = config.tooltip_order;
+            if (order === undefined) {
+                order = config.data_order;
+            }
+
+            var valueOf = function valueOf(obj) {
+                return obj ? obj.value : null;
+            };
+
+            // if data are not grouped, we sort them by their value
+            if (isString(order) && order.toLowerCase() === 'asc') {
+                return function (a, b) {
+                    return valueOf(a) - valueOf(b);
+                };
+            } else if (isString(order) && order.toLowerCase() === 'desc') {
+                return function (a, b) {
+                    return valueOf(b) - valueOf(a);
+                };
+            } else if (isFunction(order)) {
+
+                // if the function is from data_order we need
+                // to wrap the returned function in order to format
+                // the sorted value to the expected format
+
+                var sortFunction = order;
+
+                if (config.tooltip_order === undefined) {
+                    sortFunction = function sortFunction(a, b) {
+                        return order(a ? {
+                            id: a.id,
+                            values: [a]
+                        } : null, b ? {
+                            id: b.id,
+                            values: [b]
+                        } : null);
+                    };
+                }
+
+                return sortFunction;
+            } else if (isArray(order)) {
+                return function (a, b) {
+                    return order.indexOf(a.id) - order.indexOf(b.id);
+                };
+            }
+        } else {
+            // if data are grouped, we follow the order of grouped targets
+            var ids = $$.orderTargets($$.data.targets).map(function (i) {
+                return i.id;
+            });
+
+            // if it was either asc or desc we need to invert the order
+            // returned by orderTargets
+            if ($$.isOrderAsc() || $$.isOrderDesc()) {
+                ids = ids.reverse();
+            }
+
+            return function (a, b) {
+                return ids.indexOf(a.id) - ids.indexOf(b.id);
+            };
+        }
+    };
+    ChartInternal.prototype.getTooltipContent = function (d, defaultTitleFormat, defaultValueFormat, color) {
+        var $$ = this,
+            config = $$.config,
+            titleFormat = config.tooltip_format_title || defaultTitleFormat,
+            nameFormat = config.tooltip_format_name || function (name) {
+            return name;
+        },
+            valueFormat = config.tooltip_format_value || defaultValueFormat,
+            text,
+            i,
+            title,
+            value,
+            name,
+            bgcolor;
+
+        var tooltipSortFunction = this.getTooltipSortFunction();
+        if (tooltipSortFunction) {
+            d.sort(tooltipSortFunction);
+        }
+
+        for (i = 0; i < d.length; i++) {
+            if (!(d[i] && (d[i].value || d[i].value === 0))) {
+                continue;
+            }
+
+            if (!text) {
+                title = sanitise(titleFormat ? titleFormat(d[i].x) : d[i].x);
+                text = "<table class='" + $$.CLASS.tooltip + "'>" + (title || title === 0 ? "<tr><th colspan='2'>" + title + "</th></tr>" : "");
+            }
+
+            value = sanitise(valueFormat(d[i].value, d[i].ratio, d[i].id, d[i].index, d));
+            if (value !== undefined) {
+                // Skip elements when their name is set to null
+                if (d[i].name === null) {
+                    continue;
+                }
+                name = sanitise(nameFormat(d[i].name, d[i].ratio, d[i].id, d[i].index));
+                bgcolor = $$.levelColor ? $$.levelColor(d[i].value) : color(d[i].id);
+
+                text += "<tr class='" + $$.CLASS.tooltipName + "-" + $$.getTargetSelectorSuffix(d[i].id) + "'>";
+                text += "<td class='name'><span style='background-color:" + bgcolor + "'></span>" + name + "</td>";
+                text += "<td class='value'>" + value + "</td>";
+                text += "</tr>";
+            }
+        }
+        return text + "</table>";
+    };
+    ChartInternal.prototype.tooltipPosition = function (dataToShow, tWidth, tHeight, element) {
+        var $$ = this,
+            config = $$.config,
+            d3 = $$.d3;
+        var svgLeft, tooltipLeft, tooltipRight, tooltipTop, chartRight;
+        var forArc = $$.hasArcType(),
+            mouse = d3.mouse(element);
+        // Determin tooltip position
+        if (forArc) {
+            tooltipLeft = ($$.width - ($$.isLegendRight ? $$.getLegendWidth() : 0)) / 2 + mouse[0];
+            tooltipTop = ($$.hasType('gauge') ? $$.height : $$.height / 2) + mouse[1] + 20;
+        } else {
+            svgLeft = $$.getSvgLeft(true);
+            if (config.axis_rotated) {
+                tooltipLeft = svgLeft + mouse[0] + 100;
+                tooltipRight = tooltipLeft + tWidth;
+                chartRight = $$.currentWidth - $$.getCurrentPaddingRight();
+                tooltipTop = $$.x(dataToShow[0].x) + 20;
+            } else {
+                tooltipLeft = svgLeft + $$.getCurrentPaddingLeft(true) + $$.x(dataToShow[0].x) + 20;
+                tooltipRight = tooltipLeft + tWidth;
+                chartRight = svgLeft + $$.currentWidth - $$.getCurrentPaddingRight();
+                tooltipTop = mouse[1] + 15;
+            }
+
+            if (tooltipRight > chartRight) {
+                // 20 is needed for Firefox to keep tooltip width
+                tooltipLeft -= tooltipRight - chartRight + 20;
+            }
+            if (tooltipTop + tHeight > $$.currentHeight) {
+                tooltipTop -= tHeight + 30;
+            }
+        }
+        if (tooltipTop < 0) {
+            tooltipTop = 0;
+        }
+        return {
+            top: tooltipTop,
+            left: tooltipLeft
+        };
+    };
+    ChartInternal.prototype.showTooltip = function (selectedData, element) {
+        var $$ = this,
+            config = $$.config;
+        var tWidth, tHeight, position;
+        var forArc = $$.hasArcType(),
+            dataToShow = selectedData.filter(function (d) {
+            return d && isValue(d.value);
+        }),
+            positionFunction = config.tooltip_position || ChartInternal.prototype.tooltipPosition;
+        if (dataToShow.length === 0 || !config.tooltip_show) {
+            return;
+        }
+        $$.tooltip.html(config.tooltip_contents.call($$, selectedData, $$.axis.getXAxisTickFormat(), $$.getYFormat(forArc), $$.color)).style("display", "block");
+
+        // Get tooltip dimensions
+        tWidth = $$.tooltip.property('offsetWidth');
+        tHeight = $$.tooltip.property('offsetHeight');
+
+        position = positionFunction.call(this, dataToShow, tWidth, tHeight, element);
+        // Set tooltip
+        $$.tooltip.style("top", position.top + "px").style("left", position.left + 'px');
+    };
+    ChartInternal.prototype.hideTooltip = function () {
+        this.tooltip.style("display", "none");
+    };
+
+    ChartInternal.prototype.setTargetType = function (targetIds, type) {
+        var $$ = this,
+            config = $$.config;
+        $$.mapToTargetIds(targetIds).forEach(function (id) {
+            $$.withoutFadeIn[id] = type === config.data_types[id];
+            config.data_types[id] = type;
+        });
+        if (!targetIds) {
+            config.data_type = type;
+        }
+    };
+    ChartInternal.prototype.hasType = function (type, targets) {
+        var $$ = this,
+            types = $$.config.data_types,
+            has = false;
+        targets = targets || $$.data.targets;
+        if (targets && targets.length) {
+            targets.forEach(function (target) {
+                var t = types[target.id];
+                if (t && t.indexOf(type) >= 0 || !t && type === 'line') {
+                    has = true;
+                }
+            });
+        } else if (Object.keys(types).length) {
+            Object.keys(types).forEach(function (id) {
+                if (types[id] === type) {
+                    has = true;
+                }
+            });
+        } else {
+            has = $$.config.data_type === type;
+        }
+        return has;
+    };
+    ChartInternal.prototype.hasArcType = function (targets) {
+        return this.hasType('pie', targets) || this.hasType('donut', targets) || this.hasType('gauge', targets);
+    };
+    ChartInternal.prototype.isLineType = function (d) {
+        var config = this.config,
+            id = isString(d) ? d : d.id;
+        return !config.data_types[id] || ['line', 'spline', 'area', 'area-spline', 'step', 'area-step'].indexOf(config.data_types[id]) >= 0;
+    };
+    ChartInternal.prototype.isStepType = function (d) {
+        var id = isString(d) ? d : d.id;
+        return ['step', 'area-step'].indexOf(this.config.data_types[id]) >= 0;
+    };
+    ChartInternal.prototype.isSplineType = function (d) {
+        var id = isString(d) ? d : d.id;
+        return ['spline', 'area-spline'].indexOf(this.config.data_types[id]) >= 0;
+    };
+    ChartInternal.prototype.isAreaType = function (d) {
+        var id = isString(d) ? d : d.id;
+        return ['area', 'area-spline', 'area-step'].indexOf(this.config.data_types[id]) >= 0;
+    };
+    ChartInternal.prototype.isBarType = function (d) {
+        var id = isString(d) ? d : d.id;
+        return this.config.data_types[id] === 'bar';
+    };
+    ChartInternal.prototype.isScatterType = function (d) {
+        var id = isString(d) ? d : d.id;
+        return this.config.data_types[id] === 'scatter';
+    };
+    ChartInternal.prototype.isPieType = function (d) {
+        var id = isString(d) ? d : d.id;
+        return this.config.data_types[id] === 'pie';
+    };
+    ChartInternal.prototype.isGaugeType = function (d) {
+        var id = isString(d) ? d : d.id;
+        return this.config.data_types[id] === 'gauge';
+    };
+    ChartInternal.prototype.isDonutType = function (d) {
+        var id = isString(d) ? d : d.id;
+        return this.config.data_types[id] === 'donut';
+    };
+    ChartInternal.prototype.isArcType = function (d) {
+        return this.isPieType(d) || this.isDonutType(d) || this.isGaugeType(d);
+    };
+    ChartInternal.prototype.lineData = function (d) {
+        return this.isLineType(d) ? [d] : [];
+    };
+    ChartInternal.prototype.arcData = function (d) {
+        return this.isArcType(d.data) ? [d] : [];
+    };
+    /* not used
+     function scatterData(d) {
+     return isScatterType(d) ? d.values : [];
+     }
+     */
+    ChartInternal.prototype.barData = function (d) {
+        return this.isBarType(d) ? d.values : [];
+    };
+    ChartInternal.prototype.lineOrScatterData = function (d) {
+        return this.isLineType(d) || this.isScatterType(d) ? d.values : [];
+    };
+    ChartInternal.prototype.barOrLineData = function (d) {
+        return this.isBarType(d) || this.isLineType(d) ? d.values : [];
+    };
+
+    ChartInternal.prototype.isSafari = function () {
+        var ua = window.navigator.userAgent;
+        return ua.indexOf('Safari') >= 0 && ua.indexOf('Chrome') < 0;
+    };
+    ChartInternal.prototype.isChrome = function () {
+        var ua = window.navigator.userAgent;
+        return ua.indexOf('Chrome') >= 0;
+    };
+
+    ChartInternal.prototype.initZoom = function () {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config,
+            startEvent;
+
+        $$.zoom = d3.zoom().on("start", function () {
+            if (config.zoom_type !== 'scroll') {
+                return;
+            }
+
+            var e = d3.event.sourceEvent;
+            if (e && e.type === "brush") {
+                return;
+            }
+            startEvent = e;
+            config.zoom_onzoomstart.call($$.api, e);
+        }).on("zoom", function () {
+            if (config.zoom_type !== 'scroll') {
+                return;
+            }
+
+            var e = d3.event.sourceEvent;
+            if (e && e.type === "brush") {
+                return;
+            }
+
+            $$.redrawForZoom();
+
+            config.zoom_onzoom.call($$.api, $$.x.orgDomain());
+        }).on('end', function () {
+            if (config.zoom_type !== 'scroll') {
+                return;
+            }
+
+            var e = d3.event.sourceEvent;
+            if (e && e.type === "brush") {
+                return;
+            }
+            // if click, do nothing. otherwise, click interaction will be canceled.
+            if (e && startEvent.clientX === e.clientX && startEvent.clientY === e.clientY) {
+                return;
+            }
+            config.zoom_onzoomend.call($$.api, $$.x.orgDomain());
+        });
+
+        $$.zoom.updateDomain = function () {
+            if (d3.event && d3.event.transform) {
+                $$.x.domain(d3.event.transform.rescaleX($$.subX).domain());
+            }
+            return this;
+        };
+        $$.zoom.updateExtent = function () {
+            this.scaleExtent([1, Infinity]).translateExtent([[0, 0], [$$.width, $$.height]]).extent([[0, 0], [$$.width, $$.height]]);
+            return this;
+        };
+        $$.zoom.update = function () {
+            return this.updateExtent().updateDomain();
+        };
+
+        return $$.zoom.updateExtent();
+    };
+    ChartInternal.prototype.zoomTransform = function (range) {
+        var $$ = this,
+            s = [$$.x(range[0]), $$.x(range[1])];
+        return $$.d3.zoomIdentity.scale($$.width / (s[1] - s[0])).translate(-s[0], 0);
+    };
+
+    ChartInternal.prototype.initDragZoom = function () {
+        var $$ = this;
+        var d3 = $$.d3;
+        var config = $$.config;
+        var context = $$.context = $$.svg;
+        var brushXPos = $$.margin.left + 20.5;
+        var brushYPos = $$.margin.top + 0.5;
+
+        if (!(config.zoom_type === 'drag' && config.zoom_enabled)) {
+            return;
+        }
+
+        var getZoomedDomain = function getZoomedDomain(selection) {
+            return selection && selection.map(function (x) {
+                return $$.x.invert(x);
+            });
+        };
+
+        var brush = $$.dragZoomBrush = d3.brushX().on("start", function () {
+            $$.api.unzoom();
+
+            $$.svg.select("." + CLASS.dragZoom).classed("disabled", false);
+
+            config.zoom_onzoomstart.call($$.api, d3.event.sourceEvent);
+        }).on("brush", function () {
+            config.zoom_onzoom.call($$.api, getZoomedDomain(d3.event.selection));
+        }).on("end", function () {
+            if (d3.event.selection == null) {
+                return;
+            }
+
+            var zoomedDomain = getZoomedDomain(d3.event.selection);
+
+            if (!config.zoom_disableDefaultBehavior) {
+                $$.api.zoom(zoomedDomain);
+            }
+
+            $$.svg.select("." + CLASS.dragZoom).classed("disabled", true);
+
+            config.zoom_onzoomend.call($$.api, zoomedDomain);
+        });
+
+        context.append("g").classed(CLASS.dragZoom, true).attr("clip-path", $$.clipPath).attr("transform", "translate(" + brushXPos + "," + brushYPos + ")").call(brush);
+    };
+
+    ChartInternal.prototype.getZoomDomain = function () {
+        var $$ = this,
+            config = $$.config,
+            d3 = $$.d3,
+            min = d3.min([$$.orgXDomain[0], config.zoom_x_min]),
+            max = d3.max([$$.orgXDomain[1], config.zoom_x_max]);
+        return [min, max];
+    };
+    ChartInternal.prototype.redrawForZoom = function () {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config,
+            zoom = $$.zoom,
+            x = $$.x;
+        if (!config.zoom_enabled) {
+            return;
+        }
+        if ($$.filterTargetsToShow($$.data.targets).length === 0) {
+            return;
+        }
+
+        zoom.update();
+
+        if (config.zoom_disableDefaultBehavior) {
+            return;
+        }
+
+        if ($$.isCategorized() && x.orgDomain()[0] === $$.orgXDomain[0]) {
+            x.domain([$$.orgXDomain[0] - 1e-10, x.orgDomain()[1]]);
+        }
+
+        $$.redraw({
+            withTransition: false,
+            withY: config.zoom_rescale,
+            withSubchart: false,
+            withEventRect: false,
+            withDimension: false
+        });
+
+        if (d3.event.sourceEvent && d3.event.sourceEvent.type === 'mousemove') {
+            $$.cancelClick = true;
+        }
+    };
+
+    return c3;
+
+})));
diff --git a/web/static/c3.min.css b/web/static/c3.min.css
new file mode 100644
index 0000000..b62e5f5
--- /dev/null
+++ b/web/static/c3.min.css
@@ -0,0 +1 @@
+.c3 svg{font:10px sans-serif;-webkit-tap-highlight-color:transparent}.c3 line,.c3 path{fill:none;stroke:#000}.c3 text{-webkit-user-select:none;-moz-user-select:none;user-select:none}.c3-bars path,.c3-event-rect,.c3-legend-item-tile,.c3-xgrid-focus,.c3-ygrid{shape-rendering:crispEdges}.c3-chart-arc path{stroke:#fff}.c3-chart-arc rect{stroke:#fff;stroke-width:1}.c3-chart-arc text{fill:#fff;font-size:13px}.c3-grid line{stroke:#aaa}.c3-grid text{fill:#aaa}.c3-xgrid,.c3-ygrid{stroke-dasharray:3 3}.c3-text.c3-empty{fill:grey;font-size:2em}.c3-line{stroke-width:1px}.c3-circle._expanded_{stroke-width:1px;stroke:#fff}.c3-selected-circle{fill:#fff;stroke-width:2px}.c3-bar{stroke-width:0}.c3-bar._expanded_{fill-opacity:1;fill-opacity:.75}.c3-target.c3-focused{opacity:1}.c3-target.c3-focused path.c3-line,.c3-target.c3-focused path.c3-step{stroke-width:2px}.c3-target.c3-defocused{opacity:.3!important}.c3-region{fill:#4682b4;fill-opacity:.1}.c3-brush .extent{fill-opacity:.1}.c3-legend-item{font-size:12px}.c3-legend-item-hidden{opacity:.15}.c3-legend-background{opacity:.75;fill:#fff;stroke:#d3d3d3;stroke-width:1}.c3-title{font:14px sans-serif}.c3-tooltip-container{z-index:10}.c3-tooltip{border-collapse:collapse;border-spacing:0;background-color:#fff;empty-cells:show;-webkit-box-shadow:7px 7px 12px -9px #777;-moz-box-shadow:7px 7px 12px -9px #777;box-shadow:7px 7px 12px -9px #777;opacity:.9}.c3-tooltip tr{border:1px solid #ccc}.c3-tooltip th{background-color:#aaa;font-size:14px;padding:2px 5px;text-align:left;color:#fff}.c3-tooltip td{font-size:13px;padding:3px 6px;background-color:#fff;border-left:1px dotted #999}.c3-tooltip td>span{display:inline-block;width:10px;height:10px;margin-right:6px}.c3-tooltip td.value{text-align:right}.c3-area{stroke-width:0;opacity:.2}.c3-chart-arcs-title{dominant-baseline:middle;font-size:1.3em}.c3-chart-arcs .c3-chart-arcs-background{fill:#e0e0e0;stroke:#fff}.c3-chart-arcs .c3-chart-arcs-gauge-unit{fill:#000;font-size:16px}.c3-chart-arcs .c3-chart-arcs-gauge-max{fill:#777}.c3-chart-arcs .c3-chart-arcs-gauge-min{fill:#777}.c3-chart-arc .c3-gauge-value{fill:#000}.c3-chart-arc.c3-target g path{opacity:1}.c3-chart-arc.c3-target.c3-focused g path{opacity:1}.c3-drag-zoom.enabled{pointer-events:all!important;visibility:visible}.c3-drag-zoom.disabled{pointer-events:none!important;visibility:hidden}.c3-drag-zoom .extent{fill-opacity:.1}
\ No newline at end of file
diff --git a/web/static/c3.min.js b/web/static/c3.min.js
new file mode 100644
index 0000000..a5a21e9
--- /dev/null
+++ b/web/static/c3.min.js
@@ -0,0 +1,2 @@
+/* @license C3.js v0.6.7 | (c) C3 Team and other contributors | http://c3js.org/ */
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.c3=e()}(this,function(){"use strict";function l(t){var e=this;e.d3=window.d3?window.d3:"undefined"!=typeof require?require("d3"):void 0,e.api=t,e.config=e.getDefaultConfig(),e.data={},e.cache={},e.axes={}}function n(t){var e=this.internal=new l(this);e.loadConfig(t),e.beforeInit(t),e.init(),e.afterInit(t),function e(i,n,r){Object.keys(i).forEach(function(t){n[t]=i[t].bind(r),0<Object.keys(i[t]).length&&e(i[t],n[t],r)})}(n.prototype,this,this)}function i(t,e){var i=this;i.component=t,i.params=e||{},i.d3=t.d3,i.scale=i.d3.scaleLinear(),i.range,i.orient="bottom",i.innerTickSize=6,i.outerTickSize=this.params.withOuterTick?6:0,i.tickPadding=3,i.tickValues=null,i.tickFormat,i.tickArguments,i.tickOffset=0,i.tickCulling=!0,i.tickCentered,i.tickTextCharSize,i.tickTextRotate=i.params.tickTextRotate,i.tickLength,i.axis=i.generateAxis()}i.prototype.axisX=function(t,e,i){t.attr("transform",function(t){return"translate("+Math.ceil(e(t)+i)+", 0)"})},i.prototype.axisY=function(t,e){t.attr("transform",function(t){return"translate(0,"+Math.ceil(e(t))+")"})},i.prototype.scaleExtent=function(t){var e=t[0],i=t[t.length-1];return e<i?[e,i]:[i,e]},i.prototype.generateTicks=function(t){var e,i,n=[];if(t.ticks)return t.ticks.apply(t,this.tickArguments);for(i=t.domain(),e=Math.ceil(i[0]);e<i[1];e++)n.push(e);return 0<n.length&&0<n[0]&&n.unshift(n[0]-(n[1]-n[0])),n},i.prototype.copyScale=function(){var t,e=this,i=e.scale.copy();return e.params.isCategory&&(t=e.scale.domain(),i.domain([t[0],t[1]-1])),i},i.prototype.textFormatted=function(t){var e=this.tickFormat?this.tickFormat(t):t;return void 0!==e?e:""},i.prototype.updateRange=function(){var t=this;return t.range=t.scale.rangeExtent?t.scale.rangeExtent():t.scaleExtent(t.scale.range()),t.range},i.prototype.updateTickTextCharSize=function(t){var a=this;if(a.tickTextCharSize)return a.tickTextCharSize;var o={h:11.5,w:5.5};return t.select("text").text(function(t){return a.textFormatted(t)}).each(function(t){var e=this.getBoundingClientRect(),i=a.textFormatted(t),n=e.height,r=i?e.width/i.length:void 0;n&&r&&(o.h=n,o.w=r)}).text(""),a.tickTextCharSize=o},i.prototype.isVertical=function(){return"left"===this.orient||"right"===this.orient},i.prototype.tspanData=function(t,e,i){var n=this,r=n.params.tickMultiline?n.splitTickText(t,i):[].concat(n.textFormatted(t));return n.params.tickMultiline&&0<n.params.tickMultilineMax&&(r=n.ellipsify(r,n.params.tickMultilineMax)),r.map(function(t){return{index:e,splitted:t,length:r.length}})},i.prototype.splitTickText=function(t,e){var r,a,o,s=this,i=s.textFormatted(t),c=s.params.tickWidth;if("[object Array]"===Object.prototype.toString.call(i))return i;return(!c||c<=0)&&(c=s.isVertical()?95:s.params.isCategory?Math.ceil(e(1)-e(0))-12:110),function t(e,i){a=void 0;for(var n=1;n<i.length;n++)if(" "===i.charAt(n)&&(a=n),r=i.substr(0,n+1),o=s.tickTextCharSize.w*r.length,c<o)return t(e.concat(i.substr(0,a||n)),i.slice(a?a+1:n));return e.concat(i)}([],i+"")},i.prototype.ellipsify=function(t,e){if(t.length<=e)return t;for(var i=t.slice(0,e),n=3,r=e-1;0<=r;r--){var a=i[r].length;if(i[r]=i[r].substr(0,a-n).padEnd(a,"."),(n-=a)<=0)break}return i},i.prototype.updateTickLength=function(){this.tickLength=Math.max(this.innerTickSize,0)+this.tickPadding},i.prototype.lineY2=function(t){var e=this,i=e.scale(t)+(e.tickCentered?0:e.tickOffset);return e.range[0]<i&&i<e.range[1]?e.innerTickSize:0},i.prototype.textY=function(){var t=this.tickTextRotate;return t?11.5-t/15*2.5*(0<t?1:-1):this.tickLength},i.prototype.textTransform=function(){var t=this.tickTextRotate;return t?"rotate("+t+")":""},i.prototype.textTextAnchor=function(){var t=this.tickTextRotate;return t?0<t?"start":"end":"middle"},i.prototype.tspanDx=function(){var t=this.tickTextRotate;return t?8*Math.sin(Math.PI*(t/180)):0},i.prototype.tspanDy=function(t,e){var i=this.tickTextCharSize.h;return 0===e&&(i=this.isVertical()?-((t.length-1)*(this.tickTextCharSize.h/2)-3):".71em"),i},i.prototype.generateAxis=function(){var w=this,v=w.d3,b=w.params;function A(t,m){var S;return t.each(function(){var t,e,i,n=A.g=v.select(this),r=this.__chart__||w.scale,a=this.__chart__=w.copyScale(),o=w.tickValues?w.tickValues:w.generateTicks(a),s=n.selectAll(".tick").data(o,a),c=s.enter().insert("g",".domain").attr("class","tick").style("opacity",1e-6),d=s.exit().remove(),l=s.merge(c);b.isCategory?(w.tickOffset=Math.ceil((a(1)-a(0))/2),e=w.tickCentered?0:w.tickOffset,i=w.tickCentered?w.tickOffset:0):w.tickOffset=e=0,w.updateRange(),w.updateTickLength(),w.updateTickTextCharSize(n.select(".tick"));var u=l.select("line").merge(c.append("line")),h=l.select("text").merge(c.append("text")),g=l.selectAll("text").selectAll("tspan").data(function(t,e){return w.tspanData(t,e,a)}),p=g.enter().append("tspan").merge(g).text(function(t){return t.splitted});g.exit().remove();var f=n.selectAll(".domain").data([0]),_=f.enter().append("path").merge(f).attr("class","domain");switch(w.orient){case"bottom":t=w.axisX,u.attr("x1",e).attr("x2",e).attr("y2",function(t,e){return w.lineY2(t,e)}),h.attr("x",0).attr("y",function(t,e){return w.textY(t,e)}).attr("transform",function(t,e){return w.textTransform(t,e)}).style("text-anchor",function(t,e){return w.textTextAnchor(t,e)}),p.attr("x",0).attr("dy",function(t,e){return w.tspanDy(t,e)}).attr("dx",function(t,e){return w.tspanDx(t,e)}),_.attr("d","M"+w.range[0]+","+w.outerTickSize+"V0H"+w.range[1]+"V"+w.outerTickSize);break;case"top":t=w.axisX,u.attr("x1",e).attr("x2",e).attr("y2",function(t,e){return-1*w.lineY2(t,e)}),h.attr("x",0).attr("y",function(t,e){return-1*w.textY(t,e)-(b.isCategory?2:w.tickLength-2)}).attr("transform",function(t,e){return w.textTransform(t,e)}).style("text-anchor",function(t,e){return w.textTextAnchor(t,e)}),p.attr("x",0).attr("dy",function(t,e){return w.tspanDy(t,e)}).attr("dx",function(t,e){return w.tspanDx(t,e)}),_.attr("d","M"+w.range[0]+","+-w.outerTickSize+"V0H"+w.range[1]+"V"+-w.outerTickSize);break;case"left":t=w.axisY,u.attr("x2",-w.innerTickSize).attr("y1",i).attr("y2",i),h.attr("x",-w.tickLength).attr("y",w.tickOffset).style("text-anchor","end"),p.attr("x",-w.tickLength).attr("dy",function(t,e){return w.tspanDy(t,e)}),_.attr("d","M"+-w.outerTickSize+","+w.range[0]+"H0V"+w.range[1]+"H"+-w.outerTickSize);break;case"right":t=w.axisY,u.attr("x2",w.innerTickSize).attr("y1",i).attr("y2",i),h.attr("x",w.tickLength).attr("y",w.tickOffset).style("text-anchor","start"),p.attr("x",w.tickLength).attr("dy",function(t,e){return w.tspanDy(t,e)}),_.attr("d","M"+w.outerTickSize+","+w.range[0]+"H0V"+w.range[1]+"H"+w.outerTickSize)}if(a.rangeBand){var x=a,y=x.rangeBand()/2;r=a=function(t){return x(t)+y}}else r.rangeBand?r=a:d.call(t,a,w.tickOffset);c.call(t,r,w.tickOffset),S=(m?l.transition(m):l).style("opacity",1).call(t,a,w.tickOffset)}),S}return A.scale=function(t){return arguments.length?(w.scale=t,A):w.scale},A.orient=function(t){return arguments.length?(w.orient=t in{top:1,right:1,bottom:1,left:1}?t+"":"bottom",A):w.orient},A.tickFormat=function(t){return arguments.length?(w.tickFormat=t,A):w.tickFormat},A.tickCentered=function(t){return arguments.length?(w.tickCentered=t,A):w.tickCentered},A.tickOffset=function(){return w.tickOffset},A.tickInterval=function(){var t;return(t=b.isCategory?2*w.tickOffset:(A.g.select("path.domain").node().getTotalLength()-2*w.outerTickSize)/A.g.selectAll("line").size())===1/0?0:t},A.ticks=function(){return arguments.length?(w.tickArguments=arguments,A):w.tickArguments},A.tickCulling=function(t){return arguments.length?(w.tickCulling=t,A):w.tickCulling},A.tickValues=function(t){if("function"==typeof t)w.tickValues=function(){return t(w.scale.domain())};else{if(!arguments.length)return w.tickValues;w.tickValues=t}return A},A};var Y={target:"c3-target",chart:"c3-chart",chartLine:"c3-chart-line",chartLines:"c3-chart-lines",chartBar:"c3-chart-bar",chartBars:"c3-chart-bars",chartText:"c3-chart-text",chartTexts:"c3-chart-texts",chartArc:"c3-chart-arc",chartArcs:"c3-chart-arcs",chartArcsTitle:"c3-chart-arcs-title",chartArcsBackground:"c3-chart-arcs-background",chartArcsGaugeUnit:"c3-chart-arcs-gauge-unit",chartArcsGaugeMax:"c3-chart-arcs-gauge-max",chartArcsGaugeMin:"c3-chart-arcs-gauge-min",selectedCircle:"c3-selected-circle",selectedCircles:"c3-selected-circles",eventRect:"c3-event-rect",eventRects:"c3-event-rects",eventRectsSingle:"c3-event-rects-single",eventRectsMultiple:"c3-event-rects-multiple",zoomRect:"c3-zoom-rect",brush:"c3-brush",dragZoom:"c3-drag-zoom",focused:"c3-focused",defocused:"c3-defocused",region:"c3-region",regions:"c3-regions",title:"c3-title",tooltipContainer:"c3-tooltip-container",tooltip:"c3-tooltip",tooltipName:"c3-tooltip-name",shape:"c3-shape",shapes:"c3-shapes",line:"c3-line",lines:"c3-lines",bar:"c3-bar",bars:"c3-bars",circle:"c3-circle",circles:"c3-circles",arc:"c3-arc",arcLabelLine:"c3-arc-label-line",arcs:"c3-arcs",area:"c3-area",areas:"c3-areas",empty:"c3-empty",text:"c3-text",texts:"c3-texts",gaugeValue:"c3-gauge-value",grid:"c3-grid",gridLines:"c3-grid-lines",xgrid:"c3-xgrid",xgrids:"c3-xgrids",xgridLine:"c3-xgrid-line",xgridLines:"c3-xgrid-lines",xgridFocus:"c3-xgrid-focus",ygrid:"c3-ygrid",ygrids:"c3-ygrids",ygridLine:"c3-ygrid-line",ygridLines:"c3-ygrid-lines",axis:"c3-axis",axisX:"c3-axis-x",axisXLabel:"c3-axis-x-label",axisY:"c3-axis-y",axisYLabel:"c3-axis-y-label",axisY2:"c3-axis-y2",axisY2Label:"c3-axis-y2-label",legendBackground:"c3-legend-background",legendItem:"c3-legend-item",legendItemEvent:"c3-legend-item-event",legendItemTile:"c3-legend-item-tile",legendItemHidden:"c3-legend-item-hidden",legendItemFocused:"c3-legend-item-focused",dragarea:"c3-dragarea",EXPANDED:"_expanded_",SELECTED:"_selected_",INCLUDED:"_included_"},s="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t},a=function(t){return Math.ceil(t)+.5},r=function(t){return 10*Math.ceil(t/10)},k=function(t){return t[1]-t[0]},N=function(t,e,i){return D(t[e])?t[e]:i},y=function(t){var e=t.getBoundingClientRect(),i=[t.pathSegList.getItem(0),t.pathSegList.getItem(1)];return{x:i[0].x,y:Math.min(i[0].y,i[1].y),width:e.width,height:e.height}},o=function(t){return Array.isArray(t)},D=function(t){return void 0!==t},u=function(t){return null==t||c(t)&&0===t.length||"object"===(void 0===t?"undefined":s(t))&&0===Object.keys(t).length},h=function(t){return"function"==typeof t},c=function(t){return"string"==typeof t},v=function(t){return void 0===t},P=function(t){return t||0===t},C=function(t){return!u(t)},_=function(t){return"string"==typeof t?t.replace(/</g,"&lt;").replace(/>/g,"&gt;"):t},d=function t(e){!function(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}(this,t),this.owner=e,this.d3=e.d3,this.internal=i};d.prototype.init=function(){var t=this.owner,e=t.config,i=t.main;t.axes.x=i.append("g").attr("class",Y.axis+" "+Y.axisX).attr("clip-path",e.axis_x_inner?"":t.clipPathForXAxis).attr("transform",t.getTranslate("x")).style("visibility",e.axis_x_show?"visible":"hidden"),t.axes.x.append("text").attr("class",Y.axisXLabel).attr("transform",e.axis_rotated?"rotate(-90)":"").style("text-anchor",this.textAnchorForXAxisLabel.bind(this)),t.axes.y=i.append("g").attr("class",Y.axis+" "+Y.axisY).attr("clip-path",e.axis_y_inner?"":t.clipPathForYAxis).attr("transform",t.getTranslate("y")).style("visibility",e.axis_y_show?"visible":"hidden"),t.axes.y.append("text").attr("class",Y.axisYLabel).attr("transform",e.axis_rotated?"":"rotate(-90)").style("text-anchor",this.textAnchorForYAxisLabel.bind(this)),t.axes.y2=i.append("g").attr("class",Y.axis+" "+Y.axisY2).attr("transform",t.getTranslate("y2")).style("visibility",e.axis_y2_show?"visible":"hidden"),t.axes.y2.append("text").attr("class",Y.axisY2Label).attr("transform",e.axis_rotated?"":"rotate(-90)").style("text-anchor",this.textAnchorForY2AxisLabel.bind(this))},d.prototype.getXAxis=function(t,e,i,n,r,a,o){var s=this.owner,c=s.config,d={isCategory:s.isCategorized(),withOuterTick:r,tickMultiline:c.axis_x_tick_multiline,tickMultilineMax:c.axis_x_tick_multiline?Number(c.axis_x_tick_multilineMax):0,tickWidth:c.axis_x_tick_width,tickTextRotate:o?0:c.axis_x_tick_rotate,withoutTransition:a},l=new this.internal(this,d).axis.scale(t).orient(e);return s.isTimeSeries()&&n&&"function"!=typeof n&&(n=n.map(function(t){return s.parseDate(t)})),l.tickFormat(i).tickValues(n),s.isCategorized()&&(l.tickCentered(c.axis_x_tick_centered),u(c.axis_x_tick_culling)&&(c.axis_x_tick_culling=!1)),l},d.prototype.updateXAxisTickValues=function(t,e){var i,n=this.owner,r=n.config;return(r.axis_x_tick_fit||r.axis_x_tick_count)&&(i=this.generateTickValues(n.mapTargetsToUniqueXs(t),r.axis_x_tick_count,n.isTimeSeries())),e?e.tickValues(i):(n.xAxis.tickValues(i),n.subXAxis.tickValues(i)),i},d.prototype.getYAxis=function(t,e,i,n,r,a,o){var s=this.owner,c=s.config,d={withOuterTick:r,withoutTransition:a,tickTextRotate:o?0:c.axis_y_tick_rotate},l=new this.internal(this,d).axis.scale(t).orient(e).tickFormat(i);return s.isTimeSeriesY()?l.ticks(c.axis_y_tick_time_type,c.axis_y_tick_time_interval):l.tickValues(n),l},d.prototype.getId=function(t){var e=this.owner.config;return t in e.data_axes?e.data_axes[t]:"y"},d.prototype.getXAxisTickFormat=function(){var e=this.owner,i=e.config,n=e.isTimeSeries()?e.defaultAxisTimeFormat:e.isCategorized()?e.categoryName:function(t){return t};return i.axis_x_tick_format&&(h(i.axis_x_tick_format)?n=i.axis_x_tick_format:e.isTimeSeries()&&(n=function(t){return t?e.axisTimeFormat(i.axis_x_tick_format)(t):""})),h(n)?function(t){return n.call(e,t)}:n},d.prototype.getTickValues=function(t,e){return t||(e?e.tickValues():void 0)},d.prototype.getXAxisTickValues=function(){return this.getTickValues(this.owner.config.axis_x_tick_values,this.owner.xAxis)},d.prototype.getYAxisTickValues=function(){return this.getTickValues(this.owner.config.axis_y_tick_values,this.owner.yAxis)},d.prototype.getY2AxisTickValues=function(){return this.getTickValues(this.owner.config.axis_y2_tick_values,this.owner.y2Axis)},d.prototype.getLabelOptionByAxisId=function(t){var e,i=this.owner.config;return"y"===t?e=i.axis_y_label:"y2"===t?e=i.axis_y2_label:"x"===t&&(e=i.axis_x_label),e},d.prototype.getLabelText=function(t){var e=this.getLabelOptionByAxisId(t);return c(e)?e:e?e.text:null},d.prototype.setLabelText=function(t,e){var i=this.owner.config,n=this.getLabelOptionByAxisId(t);c(n)?"y"===t?i.axis_y_label=e:"y2"===t?i.axis_y2_label=e:"x"===t&&(i.axis_x_label=e):n&&(n.text=e)},d.prototype.getLabelPosition=function(t,e){var i=this.getLabelOptionByAxisId(t),n=i&&"object"===(void 0===i?"undefined":s(i))&&i.position?i.position:e;return{isInner:0<=n.indexOf("inner"),isOuter:0<=n.indexOf("outer"),isLeft:0<=n.indexOf("left"),isCenter:0<=n.indexOf("center"),isRight:0<=n.indexOf("right"),isTop:0<=n.indexOf("top"),isMiddle:0<=n.indexOf("middle"),isBottom:0<=n.indexOf("bottom")}},d.prototype.getXAxisLabelPosition=function(){return this.getLabelPosition("x",this.owner.config.axis_rotated?"inner-top":"inner-right")},d.prototype.getYAxisLabelPosition=function(){return this.getLabelPosition("y",this.owner.config.axis_rotated?"inner-right":"inner-top")},d.prototype.getY2AxisLabelPosition=function(){return this.getLabelPosition("y2",this.owner.config.axis_rotated?"inner-right":"inner-top")},d.prototype.getLabelPositionById=function(t){return"y2"===t?this.getY2AxisLabelPosition():"y"===t?this.getYAxisLabelPosition():this.getXAxisLabelPosition()},d.prototype.textForXAxisLabel=function(){return this.getLabelText("x")},d.prototype.textForYAxisLabel=function(){return this.getLabelText("y")},d.prototype.textForY2AxisLabel=function(){return this.getLabelText("y2")},d.prototype.xForAxisLabel=function(t,e){var i=this.owner;return t?e.isLeft?0:e.isCenter?i.width/2:i.width:e.isBottom?-i.height:e.isMiddle?-i.height/2:0},d.prototype.dxForAxisLabel=function(t,e){return t?e.isLeft?"0.5em":e.isRight?"-0.5em":"0":e.isTop?"-0.5em":e.isBottom?"0.5em":"0"},d.prototype.textAnchorForAxisLabel=function(t,e){return t?e.isLeft?"start":e.isCenter?"middle":"end":e.isBottom?"start":e.isMiddle?"middle":"end"},d.prototype.xForXAxisLabel=function(){return this.xForAxisLabel(!this.owner.config.axis_rotated,this.getXAxisLabelPosition())},d.prototype.xForYAxisLabel=function(){return this.xForAxisLabel(this.owner.config.axis_rotated,this.getYAxisLabelPosition())},d.prototype.xForY2AxisLabel=function(){return this.xForAxisLabel(this.owner.config.axis_rotated,this.getY2AxisLabelPosition())},d.prototype.dxForXAxisLabel=function(){return this.dxForAxisLabel(!this.owner.config.axis_rotated,this.getXAxisLabelPosition())},d.prototype.dxForYAxisLabel=function(){return this.dxForAxisLabel(this.owner.config.axis_rotated,this.getYAxisLabelPosition())},d.prototype.dxForY2AxisLabel=function(){return this.dxForAxisLabel(this.owner.config.axis_rotated,this.getY2AxisLabelPosition())},d.prototype.dyForXAxisLabel=function(){var t=this.owner,e=t.config,i=this.getXAxisLabelPosition();return e.axis_rotated?i.isInner?"1.2em":-25-(t.config.axis_x_inner?0:this.getMaxTickWidth("x")):i.isInner?"-0.5em":e.axis_x_height?e.axis_x_height-10:"3em"},d.prototype.dyForYAxisLabel=function(){var t=this.owner,e=this.getYAxisLabelPosition();return t.config.axis_rotated?e.isInner?"-0.5em":"3em":e.isInner?"1.2em":-10-(t.config.axis_y_inner?0:this.getMaxTickWidth("y")+10)},d.prototype.dyForY2AxisLabel=function(){var t=this.owner,e=this.getY2AxisLabelPosition();return t.config.axis_rotated?e.isInner?"1.2em":"-2.2em":e.isInner?"-0.5em":15+(t.config.axis_y2_inner?0:this.getMaxTickWidth("y2")+15)},d.prototype.textAnchorForXAxisLabel=function(){var t=this.owner;return this.textAnchorForAxisLabel(!t.config.axis_rotated,this.getXAxisLabelPosition())},d.prototype.textAnchorForYAxisLabel=function(){var t=this.owner;return this.textAnchorForAxisLabel(t.config.axis_rotated,this.getYAxisLabelPosition())},d.prototype.textAnchorForY2AxisLabel=function(){var t=this.owner;return this.textAnchorForAxisLabel(t.config.axis_rotated,this.getY2AxisLabelPosition())},d.prototype.getMaxTickWidth=function(t,e){var i,n,r,a,o=this.owner,s=o.config,c=0;return e&&o.currentMaxTickWidths[t]||(o.svg&&(i=o.filterTargetsToShow(o.data.targets),"y"===t?(n=o.y.copy().domain(o.getYDomain(i,"y")),r=this.getYAxis(n,o.yOrient,s.axis_y_tick_format,o.yAxisTickValues,!1,!0,!0)):"y2"===t?(n=o.y2.copy().domain(o.getYDomain(i,"y2")),r=this.getYAxis(n,o.y2Orient,s.axis_y2_tick_format,o.y2AxisTickValues,!1,!0,!0)):(n=o.x.copy().domain(o.getXDomain(i)),r=this.getXAxis(n,o.xOrient,o.xAxisTickFormat,o.xAxisTickValues,!1,!0,!0),this.updateXAxisTickValues(i,r)),(a=o.d3.select("body").append("div").classed("c3",!0)).append("svg").style("visibility","hidden").style("position","fixed").style("top",0).style("left",0).append("g").call(r).each(function(){o.d3.select(this).selectAll("text").each(function(){var t=this.getBoundingClientRect();c<t.width&&(c=t.width)}),a.remove()})),o.currentMaxTickWidths[t]=c<=0?o.currentMaxTickWidths[t]:c),o.currentMaxTickWidths[t]},d.prototype.updateLabels=function(t){var e=this.owner,i=e.main.select("."+Y.axisX+" ."+Y.axisXLabel),n=e.main.select("."+Y.axisY+" ."+Y.axisYLabel),r=e.main.select("."+Y.axisY2+" ."+Y.axisY2Label);(t?i.transition():i).attr("x",this.xForXAxisLabel.bind(this)).attr("dx",this.dxForXAxisLabel.bind(this)).attr("dy",this.dyForXAxisLabel.bind(this)).text(this.textForXAxisLabel.bind(this)),(t?n.transition():n).attr("x",this.xForYAxisLabel.bind(this)).attr("dx",this.dxForYAxisLabel.bind(this)).attr("dy",this.dyForYAxisLabel.bind(this)).text(this.textForYAxisLabel.bind(this)),(t?r.transition():r).attr("x",this.xForY2AxisLabel.bind(this)).attr("dx",this.dxForY2AxisLabel.bind(this)).attr("dy",this.dyForY2AxisLabel.bind(this)).text(this.textForY2AxisLabel.bind(this))},d.prototype.getPadding=function(t,e,i,n){var r="number"==typeof t?t:t[e];return P(r)?"ratio"===t.unit?t[e]*n:this.convertPixelsToAxisPadding(r,n):i},d.prototype.convertPixelsToAxisPadding=function(t,e){var i=this.owner;return e*(t/(i.config.axis_rotated?i.width:i.height))},d.prototype.generateTickValues=function(t,e,i){var n,r,a,o,s,c,d,l=t;if(e)if(1===(n=h(e)?e():e))l=[t[0]];else if(2===n)l=[t[0],t[t.length-1]];else if(2<n){for(o=n-2,r=t[0],s=((a=t[t.length-1])-r)/(o+1),l=[r],c=0;c<o;c++)d=+r+s*(c+1),l.push(i?new Date(d):d);l.push(a)}return i||(l=l.sort(function(t,e){return t-e})),l},d.prototype.generateTransitions=function(t){var e=this.owner.axes;return{axisX:t?e.x.transition().duration(t):e.x,axisY:t?e.y.transition().duration(t):e.y,axisY2:t?e.y2.transition().duration(t):e.y2,axisSubX:t?e.subx.transition().duration(t):e.subx}},d.prototype.redraw=function(t,e){var i=this.owner,n=t?i.d3.transition().duration(t):null;i.axes.x.style("opacity",e?0:1).call(i.xAxis,n),i.axes.y.style("opacity",e?0:1).call(i.yAxis,n),i.axes.y2.style("opacity",e?0:1).call(i.y2Axis,n),i.axes.subx.style("opacity",e?0:1).call(i.subXAxis,n)};var t={version:"0.6.7",chart:{fn:n.prototype,internal:{fn:l.prototype,axis:{fn:d.prototype,internal:{fn:i.prototype}}}},generate:function(t){return new n(t)}};return l.prototype.beforeInit=function(){},l.prototype.afterInit=function(){},l.prototype.init=function(){var t=this,e=t.config;if(t.initParams(),e.data_url)t.convertUrlToData(e.data_url,e.data_mimeType,e.data_headers,e.data_keys,t.initWithData);else if(e.data_json)t.initWithData(t.convertJsonToData(e.data_json,e.data_keys));else if(e.data_rows)t.initWithData(t.convertRowsToData(e.data_rows));else{if(!e.data_columns)throw Error("url or json or rows or columns is required.");t.initWithData(t.convertColumnsToData(e.data_columns))}},l.prototype.initParams=function(){var t=this,e=t.d3,i=t.config;t.clipId="c3-"+ +new Date+"-clip",t.clipIdForXAxis=t.clipId+"-xaxis",t.clipIdForYAxis=t.clipId+"-yaxis",t.clipIdForGrid=t.clipId+"-grid",t.clipIdForSubchart=t.clipId+"-subchart",t.clipPath=t.getClipPath(t.clipId),t.clipPathForXAxis=t.getClipPath(t.clipIdForXAxis),t.clipPathForYAxis=t.getClipPath(t.clipIdForYAxis),t.clipPathForGrid=t.getClipPath(t.clipIdForGrid),t.clipPathForSubchart=t.getClipPath(t.clipIdForSubchart),t.dragStart=null,t.dragging=!1,t.flowing=!1,t.cancelClick=!1,t.mouseover=!1,t.transiting=!1,t.color=t.generateColor(),t.levelColor=t.generateLevelColor(),t.dataTimeParse=(i.data_xLocaltime?e.timeParse:e.utcParse)(t.config.data_xFormat),t.axisTimeFormat=i.axis_x_localtime?e.timeFormat:e.utcFormat,t.defaultAxisTimeFormat=function(t){return t.getMilliseconds()?e.timeFormat(".%L")(t):t.getSeconds()?e.timeFormat(":%S")(t):t.getMinutes()?e.timeFormat("%I:%M")(t):t.getHours()?e.timeFormat("%I %p")(t):t.getDay()&&1!==t.getDate()?e.timeFormat("%-m/%-d")(t):1!==t.getDate()?e.timeFormat("%-m/%-d")(t):t.getMonth()?e.timeFormat("%-m/%-d")(t):e.timeFormat("%Y/%-m/%-d")(t)},t.hiddenTargetIds=[],t.hiddenLegendIds=[],t.focusedTargetIds=[],t.defocusedTargetIds=[],t.xOrient=i.axis_rotated?i.axis_x_inner?"right":"left":i.axis_x_inner?"top":"bottom",t.yOrient=i.axis_rotated?i.axis_y_inner?"top":"bottom":i.axis_y_inner?"right":"left",t.y2Orient=i.axis_rotated?i.axis_y2_inner?"bottom":"top":i.axis_y2_inner?"left":"right",t.subXOrient=i.axis_rotated?"left":"bottom",t.isLegendRight="right"===i.legend_position,t.isLegendInset="inset"===i.legend_position,t.isLegendTop="top-left"===i.legend_inset_anchor||"top-right"===i.legend_inset_anchor,t.isLegendLeft="top-left"===i.legend_inset_anchor||"bottom-left"===i.legend_inset_anchor,t.legendStep=0,t.legendItemWidth=0,t.legendItemHeight=0,t.currentMaxTickWidths={x:0,y:0,y2:0},t.rotated_padding_left=30,t.rotated_padding_right=i.axis_rotated&&!i.axis_x_show?0:30,t.rotated_padding_top=5,t.withoutFadeIn={},t.intervalForObserveInserted=void 0,t.axes.subx=e.selectAll([])},l.prototype.initChartElements=function(){this.initBar&&this.initBar(),this.initLine&&this.initLine(),this.initArc&&this.initArc(),this.initGauge&&this.initGauge(),this.initText&&this.initText()},l.prototype.initWithData=function(t){var e,i,n=this,r=n.d3,a=n.config,o=!0;n.axis=new d(n),a.bindto?"function"==typeof a.bindto.node?n.selectChart=a.bindto:n.selectChart=r.select(a.bindto):n.selectChart=r.selectAll([]),n.selectChart.empty()&&(n.selectChart=r.select(document.createElement("div")).style("opacity",0),n.observeInserted(n.selectChart),o=!1),n.selectChart.html("").classed("c3",!0),n.data.xs={},n.data.targets=n.convertDataToTargets(t),a.data_filter&&(n.data.targets=n.data.targets.filter(a.data_filter)),a.data_hide&&n.addHiddenTargetIds(!0===a.data_hide?n.mapToIds(n.data.targets):a.data_hide),a.legend_hide&&n.addHiddenLegendIds(!0===a.legend_hide?n.mapToIds(n.data.targets):a.legend_hide),n.updateSizes(),n.updateScales(),n.x.domain(r.extent(n.getXDomain(n.data.targets))),n.y.domain(n.getYDomain(n.data.targets,"y")),n.y2.domain(n.getYDomain(n.data.targets,"y2")),n.subX.domain(n.x.domain()),n.subY.domain(n.y.domain()),n.subY2.domain(n.y2.domain()),n.orgXDomain=n.x.domain(),n.svg=n.selectChart.append("svg").style("overflow","hidden").on("mouseenter",function(){return a.onmouseover.call(n)}).on("mouseleave",function(){return a.onmouseout.call(n)}),n.config.svg_classname&&n.svg.attr("class",n.config.svg_classname),e=n.svg.append("defs"),n.clipChart=n.appendClip(e,n.clipId),n.clipXAxis=n.appendClip(e,n.clipIdForXAxis),n.clipYAxis=n.appendClip(e,n.clipIdForYAxis),n.clipGrid=n.appendClip(e,n.clipIdForGrid),n.clipSubchart=n.appendClip(e,n.clipIdForSubchart),n.updateSvgSize(),i=n.main=n.svg.append("g").attr("transform",n.getTranslate("main")),n.initPie&&n.initPie(),n.initDragZoom&&n.initDragZoom(),n.initSubchart&&n.initSubchart(),n.initTooltip&&n.initTooltip(),n.initLegend&&n.initLegend(),n.initTitle&&n.initTitle(),n.initZoom&&n.initZoom(),n.initSubchartBrush&&n.initSubchartBrush(),i.append("text").attr("class",Y.text+" "+Y.empty).attr("text-anchor","middle").attr("dominant-baseline","middle"),n.initRegion(),n.initGrid(),i.append("g").attr("clip-path",n.clipPath).attr("class",Y.chart),a.grid_lines_front&&n.initGridLines(),n.initEventRect(),n.initChartElements(),n.axis.init(),n.updateTargets(n.data.targets),a.axis_x_selection&&n.brush.selectionAsValue(n.getDefaultSelection()),o&&(n.updateDimension(),n.config.oninit.call(n),n.redraw({withTransition:!1,withTransform:!0,withUpdateXDomain:!0,withUpdateOrgXDomain:!0,withTransitionForAxis:!1})),n.bindResize(),n.api.element=n.selectChart.node()},l.prototype.smoothLines=function(t,e){var a=this;"grid"===e&&t.each(function(){var t=a.d3.select(this),e=t.attr("x1"),i=t.attr("x2"),n=t.attr("y1"),r=t.attr("y2");t.attr({x1:Math.ceil(e),x2:Math.ceil(i),y1:Math.ceil(n),y2:Math.ceil(r)})})},l.prototype.updateSizes=function(){var t=this,e=t.config,i=t.legend?t.getLegendHeight():0,n=t.legend?t.getLegendWidth():0,r=t.isLegendRight||t.isLegendInset?0:i,a=t.hasArcType(),o=e.axis_rotated||a?0:t.getHorizontalAxisHeight("x"),s=e.subchart_show&&!a?e.subchart_size_height+o:0;t.currentWidth=t.getCurrentWidth(),t.currentHeight=t.getCurrentHeight(),t.margin=e.axis_rotated?{top:t.getHorizontalAxisHeight("y2")+t.getCurrentPaddingTop(),right:a?0:t.getCurrentPaddingRight(),bottom:t.getHorizontalAxisHeight("y")+r+t.getCurrentPaddingBottom(),left:s+(a?0:t.getCurrentPaddingLeft())}:{top:4+t.getCurrentPaddingTop(),right:a?0:t.getCurrentPaddingRight(),bottom:o+s+r+t.getCurrentPaddingBottom(),left:a?0:t.getCurrentPaddingLeft()},t.margin2=e.axis_rotated?{top:t.margin.top,right:NaN,bottom:20+r,left:t.rotated_padding_left}:{top:t.currentHeight-s-r,right:NaN,bottom:o+r,left:t.margin.left},t.margin3={top:0,right:NaN,bottom:0,left:0},t.updateSizeForLegend&&t.updateSizeForLegend(i,n),t.width=t.currentWidth-t.margin.left-t.margin.right,t.height=t.currentHeight-t.margin.top-t.margin.bottom,t.width<0&&(t.width=0),t.height<0&&(t.height=0),t.width2=e.axis_rotated?t.margin.left-t.rotated_padding_left-t.rotated_padding_right:t.width,t.height2=e.axis_rotated?t.height:t.currentHeight-t.margin2.top-t.margin2.bottom,t.width2<0&&(t.width2=0),t.height2<0&&(t.height2=0),t.arcWidth=t.width-(t.isLegendRight?n+10:0),t.arcHeight=t.height-(t.isLegendRight?0:10),t.hasType("gauge")&&!e.gauge_fullCircle&&(t.arcHeight+=t.height-t.getGaugeLabelHeight()),t.updateRadius&&t.updateRadius(),t.isLegendRight&&a&&(t.margin3.left=t.arcWidth/2+1.1*t.radiusExpanded)},l.prototype.updateTargets=function(t){var e=this;e.updateTargetsForText(t),e.updateTargetsForBar(t),e.updateTargetsForLine(t),e.hasArcType()&&e.updateTargetsForArc&&e.updateTargetsForArc(t),e.updateTargetsForSubchart&&e.updateTargetsForSubchart(t),e.showTargets()},l.prototype.showTargets=function(){var e=this;e.svg.selectAll("."+Y.target).filter(function(t){return e.isTargetToShow(t.id)}).transition().duration(e.config.transition_duration).style("opacity",1)},l.prototype.redraw=function(t,e){var 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this._list.splice(t,1),this._writeListToPath(),e},window.SVGPathSegList.prototype.appendItem=function(t){return this._checkPathSynchronizedToList(),t._owningPathSegList&&(t=t.clone()),this._list.push(t),(t._owningPathSegList=this)._writeListToPath(),t},window.SVGPathSegList._pathSegArrayAsString=function(t){var e="",i=!0;return t.forEach(function(t){i?(i=!1,e+=t._asPathString()):e+=" "+t._asPathString()}),e},window.SVGPathSegList.prototype._parsePath=function(t){if(!t||0==t.length)return[];var n=this,e=function(){this.pathSegList=[]};e.prototype.appendSegment=function(t){this.pathSegList.push(t)};var i=function(t){this._string=t,this._currentIndex=0,this._endIndex=this._string.length,this._previousCommand=window.SVGPathSeg.PATHSEG_UNKNOWN,this._skipOptionalSpaces()};i.prototype._isCurrentSpace=function(){var t=this._string[this._currentIndex];return t<=" "&&(" "==t||"\n"==t||"\t"==t||"\r"==t||"\f"==t)},i.prototype._skipOptionalSpaces=function(){for(;this._currentIndex<this._endIndex&&this._isCurrentSpace();)this._currentIndex++;return this._currentIndex<this._endIndex},i.prototype._skipOptionalSpacesOrDelimiter=function(){return!(this._currentIndex<this._endIndex&&!this._isCurrentSpace()&&","!=this._string.charAt(this._currentIndex))&&(this._skipOptionalSpaces()&&this._currentIndex<this._endIndex&&","==this._string.charAt(this._currentIndex)&&(this._currentIndex++,this._skipOptionalSpaces()),this._currentIndex<this._endIndex)},i.prototype.hasMoreData=function(){return this._currentIndex<this._endIndex},i.prototype.peekSegmentType=function(){var t=this._string[this._currentIndex];return this._pathSegTypeFromChar(t)},i.prototype._pathSegTypeFromChar=function(t){switch(t){case"Z":case"z":return window.SVGPathSeg.PATHSEG_CLOSEPATH;case"M":return window.SVGPathSeg.PATHSEG_MOVETO_ABS;case"m":return window.SVGPathSeg.PATHSEG_MOVETO_REL;case"L":return window.SVGPathSeg.PATHSEG_LINETO_ABS;case"l":return window.SVGPathSeg.PATHSEG_LINETO_REL;case"C":return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS;case"c":return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL;case"Q":return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS;case"q":return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL;case"A":return window.SVGPathSeg.PATHSEG_ARC_ABS;case"a":return window.SVGPathSeg.PATHSEG_ARC_REL;case"H":return window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS;case"h":return window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL;case"V":return window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS;case"v":return window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL;case"S":return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS;case"s":return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL;case"T":return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS;case"t":return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL;default:return window.SVGPathSeg.PATHSEG_UNKNOWN}},i.prototype._nextCommandHelper=function(t,e){return("+"==t||"-"==t||"."==t||"0"<=t&&t<="9")&&e!=window.SVGPathSeg.PATHSEG_CLOSEPATH?e==window.SVGPathSeg.PATHSEG_MOVETO_ABS?window.SVGPathSeg.PATHSEG_LINETO_ABS:e==window.SVGPathSeg.PATHSEG_MOVETO_REL?window.SVGPathSeg.PATHSEG_LINETO_REL:e:window.SVGPathSeg.PATHSEG_UNKNOWN},i.prototype.initialCommandIsMoveTo=function(){if(!this.hasMoreData())return!0;var t=this.peekSegmentType();return t==window.SVGPathSeg.PATHSEG_MOVETO_ABS||t==window.SVGPathSeg.PATHSEG_MOVETO_REL},i.prototype._parseNumber=function(){var t=0,e=0,i=1,n=0,r=1,a=1,o=this._currentIndex;if(this._skipOptionalSpaces(),this._currentIndex<this._endIndex&&"+"==this._string.charAt(this._currentIndex)?this._currentIndex++:this._currentIndex<this._endIndex&&"-"==this._string.charAt(this._currentIndex)&&(this._currentIndex++,r=-1),!(this._currentIndex==this._endIndex||(this._string.charAt(this._currentIndex)<"0"||"9"<this._string.charAt(this._currentIndex))&&"."!=this._string.charAt(this._currentIndex))){for(var s=this._currentIndex;this._currentIndex<this._endIndex&&"0"<=this._string.charAt(this._currentIndex)&&this._string.charAt(this._currentIndex)<="9";)this._currentIndex++;if(this._currentIndex!=s)for(var c=this._currentIndex-1,d=1;s<=c;)e+=d*(this._string.charAt(c--)-"0"),d*=10;if(this._currentIndex<this._endIndex&&"."==this._string.charAt(this._currentIndex)){if(this._currentIndex++,this._currentIndex>=this._endIndex||this._string.charAt(this._currentIndex)<"0"||"9"<this._string.charAt(this._currentIndex))return;for(;this._currentIndex<this._endIndex&&"0"<=this._string.charAt(this._currentIndex)&&this._string.charAt(this._currentIndex)<="9";)i*=10,n+=(this._string.charAt(this._currentIndex)-"0")/i,this._currentIndex+=1}if(this._currentIndex!=o&&this._currentIndex+1<this._endIndex&&("e"==this._string.charAt(this._currentIndex)||"E"==this._string.charAt(this._currentIndex))&&"x"!=this._string.charAt(this._currentIndex+1)&&"m"!=this._string.charAt(this._currentIndex+1)){if(this._currentIndex++,"+"==this._string.charAt(this._currentIndex)?this._currentIndex++:"-"==this._string.charAt(this._currentIndex)&&(this._currentIndex++,a=-1),this._currentIndex>=this._endIndex||this._string.charAt(this._currentIndex)<"0"||"9"<this._string.charAt(this._currentIndex))return;for(;this._currentIndex<this._endIndex&&"0"<=this._string.charAt(this._currentIndex)&&this._string.charAt(this._currentIndex)<="9";)t*=10,t+=this._string.charAt(this._currentIndex)-"0",this._currentIndex++}var l=e+n;if(l*=r,t&&(l*=Math.pow(10,a*t)),o!=this._currentIndex)return this._skipOptionalSpacesOrDelimiter(),l}},i.prototype._parseArcFlag=function(){if(!(this._currentIndex>=this._endIndex)){var t=!1,e=this._string.charAt(this._currentIndex++);if("0"==e)t=!1;else{if("1"!=e)return;t=!0}return this._skipOptionalSpacesOrDelimiter(),t}},i.prototype.parseSegment=function(){var t=this._string[this._currentIndex],e=this._pathSegTypeFromChar(t);if(e==window.SVGPathSeg.PATHSEG_UNKNOWN){if(this._previousCommand==window.SVGPathSeg.PATHSEG_UNKNOWN)return null;if((e=this._nextCommandHelper(t,this._previousCommand))==window.SVGPathSeg.PATHSEG_UNKNOWN)return null}else this._currentIndex++;switch(this._previousCommand=e){case window.SVGPathSeg.PATHSEG_MOVETO_REL:return new window.SVGPathSegMovetoRel(n,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_MOVETO_ABS:return new window.SVGPathSegMovetoAbs(n,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_REL:return new window.SVGPathSegLinetoRel(n,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_ABS:return new window.SVGPathSegLinetoAbs(n,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL:return new window.SVGPathSegLinetoHorizontalRel(n,this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS:return new window.SVGPathSegLinetoHorizontalAbs(n,this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL:return new window.SVGPathSegLinetoVerticalRel(n,this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS:return new window.SVGPathSegLinetoVerticalAbs(n,this._parseNumber());case window.SVGPathSeg.PATHSEG_CLOSEPATH:return this._skipOptionalSpaces(),new window.SVGPathSegClosePath(n);case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL:var i={x1:this._parseNumber(),y1:this._parseNumber(),x2:this._parseNumber(),y2:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()};return new window.SVGPathSegCurvetoCubicRel(n,i.x,i.y,i.x1,i.y1,i.x2,i.y2);case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS:return i={x1:this._parseNumber(),y1:this._parseNumber(),x2:this._parseNumber(),y2:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoCubicAbs(n,i.x,i.y,i.x1,i.y1,i.x2,i.y2);case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL:return i={x2:this._parseNumber(),y2:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoCubicSmoothRel(n,i.x,i.y,i.x2,i.y2);case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS:return i={x2:this._parseNumber(),y2:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoCubicSmoothAbs(n,i.x,i.y,i.x2,i.y2);case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL:return i={x1:this._parseNumber(),y1:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoQuadraticRel(n,i.x,i.y,i.x1,i.y1);case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS:return i={x1:this._parseNumber(),y1:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoQuadraticAbs(n,i.x,i.y,i.x1,i.y1);case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL:return new window.SVGPathSegCurvetoQuadraticSmoothRel(n,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS:return new window.SVGPathSegCurvetoQuadraticSmoothAbs(n,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_ARC_REL:return i={x1:this._parseNumber(),y1:this._parseNumber(),arcAngle:this._parseNumber(),arcLarge:this._parseArcFlag(),arcSweep:this._parseArcFlag(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegArcRel(n,i.x,i.y,i.x1,i.y1,i.arcAngle,i.arcLarge,i.arcSweep);case window.SVGPathSeg.PATHSEG_ARC_ABS:return i={x1:this._parseNumber(),y1:this._parseNumber(),arcAngle:this._parseNumber(),arcLarge:this._parseArcFlag(),arcSweep:this._parseArcFlag(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegArcAbs(n,i.x,i.y,i.x1,i.y1,i.arcAngle,i.arcLarge,i.arcSweep);default:throw"Unknown path seg type."}};var r=new e,a=new i(t);if(!a.initialCommandIsMoveTo())return[];for(;a.hasMoreData();){var o=a.parseSegment();if(!o)return[];r.appendSegment(o)}return r.pathSegList}),String.prototype.padEnd||(String.prototype.padEnd=function(t,e){return t>>=0,e=String(void 0!==e?e:" "),this.length>t?String(this):((t-=this.length)>e.length&&(e+=e.repeat(t/e.length)),String(this)+e.slice(0,t))}),(n.prototype.axis=function(){}).labels=function(e){var i=this.internal;arguments.length&&(Object.keys(e).forEach(function(t){i.axis.setLabelText(t,e[t])}),i.axis.updateLabels())},n.prototype.axis.max=function(t){var e=this.internal,i=e.config;if(!arguments.length)return{x:i.axis_x_max,y:i.axis_y_max,y2:i.axis_y2_max};"object"===(void 0===t?"undefined":s(t))?(P(t.x)&&(i.axis_x_max=t.x),P(t.y)&&(i.axis_y_max=t.y),P(t.y2)&&(i.axis_y2_max=t.y2)):i.axis_y_max=i.axis_y2_max=t,e.redraw({withUpdateOrgXDomain:!0,withUpdateXDomain:!0})},n.prototype.axis.min=function(t){var e=this.internal,i=e.config;if(!arguments.length)return{x:i.axis_x_min,y:i.axis_y_min,y2:i.axis_y2_min};"object"===(void 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e=this.internal;if(window.clearInterval(e.intervalForObserveInserted),void 0!==e.resizeTimeout&&window.clearTimeout(e.resizeTimeout),window.detachEvent)window.detachEvent("onresize",e.resizeIfElementDisplayed);else if(window.removeEventListener)window.removeEventListener("resize",e.resizeIfElementDisplayed);else{var t=window.onresize;t&&t.add&&t.remove&&t.remove(e.resizeFunction)}return e.resizeFunction.remove(),e.selectChart.classed("c3",!1).html(""),Object.keys(e).forEach(function(t){e[t]=null}),null},n.prototype.color=function(t){return this.internal.color(t)},(n.prototype.data=function(e){var t=this.internal.data.targets;return void 0===e?t:t.filter(function(t){return 0<=[].concat(e).indexOf(t.id)})}).shown=function(t){return this.internal.filterTargetsToShow(this.data(t))},n.prototype.data.values=function(t){var e,i=null;return t&&(i=(e=this.data(t))[0]?e[0].values.map(function(t){return t.value}):null),i},n.prototype.data.names=function(t){return 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e,i;for(e=0;e<d.length;e++)if(t.id===d[e])for(h=t.values[t.values.length-1].index+1,i=0;i<u;i++)t.values.push({id:t.id,index:h+i,x:c.isTimeSeries()?c.getOtherTargetX(h+i):h+i,value:null})}),c.data.targets.length&&r.forEach(function(t){var e,i=[];for(e=c.data.targets[0].values[0].index;e<h;e++)i.push({id:t.id,index:e,x:c.isTimeSeries()?c.getOtherTargetX(e):e,value:null});t.values.forEach(function(t){t.index+=h,c.isTimeSeries()||(t.x+=h)}),t.values=i.concat(t.values)}),c.data.targets=c.data.targets.concat(r),c.getMaxDataCount(),a=(n=c.data.targets[0]).values[0],D(t.to)?(u=0,s=c.isTimeSeries()?c.parseDate(t.to):t.to,n.values.forEach(function(t){t.x<s&&u++})):D(t.length)&&(u=t.length),l?1===l&&c.isTimeSeries()&&(o=(n.values[n.values.length-1].x-a.x)/2,i=[new Date(+a.x-o),new 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t,i=this.internal;e=i.mapToTargetIds(e),t=i.svg.selectAll(i.selectorTargets(e.filter(i.isTargetToShow,i))),this.revert(),this.defocus(),t.classed(Y.focused,!0).classed(Y.defocused,!1),i.hasArcType()&&i.expandArc(e),i.toggleFocusLegend(e,!0),i.focusedTargetIds=e,i.defocusedTargetIds=i.defocusedTargetIds.filter(function(t){return e.indexOf(t)<0})},n.prototype.defocus=function(e){var t=this.internal;e=t.mapToTargetIds(e),t.svg.selectAll(t.selectorTargets(e.filter(t.isTargetToShow,t))).classed(Y.focused,!1).classed(Y.defocused,!0),t.hasArcType()&&t.unexpandArc(e),t.toggleFocusLegend(e,!1),t.focusedTargetIds=t.focusedTargetIds.filter(function(t){return e.indexOf(t)<0}),t.defocusedTargetIds=e},n.prototype.revert=function(t){var e=this.internal;t=e.mapToTargetIds(t),e.svg.selectAll(e.selectorTargets(t)).classed(Y.focused,!1).classed(Y.defocused,!1),e.hasArcType()&&e.unexpandArc(t),e.config.legend_show&&(e.showLegend(t.filter(e.isLegendToShow.bind(e))),e.legend.selectAll(e.selectorLegends(t)).filter(function(){return e.d3.select(this).classed(Y.legendItemFocused)}).classed(Y.legendItemFocused,!1)),e.focusedTargetIds=[],e.defocusedTargetIds=[]},(n.prototype.xgrids=function(t){var e=this.internal,i=e.config;return t&&(i.grid_x_lines=t,e.redrawWithoutRescale()),i.grid_x_lines}).add=function(t){var e=this.internal;return this.xgrids(e.config.grid_x_lines.concat(t||[]))},n.prototype.xgrids.remove=function(t){this.internal.removeGridLines(t,!0)},(n.prototype.ygrids=function(t){var e=this.internal,i=e.config;return t&&(i.grid_y_lines=t,e.redrawWithoutRescale()),i.grid_y_lines}).add=function(t){var e=this.internal;return this.ygrids(e.config.grid_y_lines.concat(t||[]))},n.prototype.ygrids.remove=function(t){this.internal.removeGridLines(t,!1)},n.prototype.groups=function(t){var e=this.internal,i=e.config;return v(t)||(i.data_groups=t,e.redraw()),i.data_groups},(n.prototype.legend=function(){}).show=function(t){var e=this.internal;e.showLegend(e.mapToTargetIds(t)),e.updateAndRedraw({withLegend:!0})},n.prototype.legend.hide=function(t){var e=this.internal;e.hideLegend(e.mapToTargetIds(t)),e.updateAndRedraw({withLegend:!1})},n.prototype.load=function(e){var t=this.internal,i=t.config;e.xs&&t.addXs(e.xs),"names"in e&&n.prototype.data.names.bind(this)(e.names),"classes"in e&&Object.keys(e.classes).forEach(function(t){i.data_classes[t]=e.classes[t]}),"categories"in e&&t.isCategorized()&&(i.axis_x_categories=e.categories),"axes"in e&&Object.keys(e.axes).forEach(function(t){i.data_axes[t]=e.axes[t]}),"colors"in e&&Object.keys(e.colors).forEach(function(t){i.data_colors[t]=e.colors[t]}),"cacheIds"in e&&t.hasCaches(e.cacheIds)?t.load(t.getCaches(e.cacheIds),e.done):"unload"in e?t.unload(t.mapToTargetIds("boolean"==typeof e.unload&&e.unload?null:e.unload),function(){t.loadFromArgs(e)}):t.loadFromArgs(e)},n.prototype.unload=function(t){var e=this.internal;(t=t||{})instanceof Array?t={ids:t}:"string"==typeof t&&(t={ids:[t]}),e.unload(e.mapToTargetIds(t.ids),function(){e.redraw({withUpdateOrgXDomain:!0,withUpdateXDomain:!0,withLegend:!0}),t.done&&t.done()})},(n.prototype.regions=function(t){var e=this.internal,i=e.config;return t&&(i.regions=t,e.redrawWithoutRescale()),i.regions}).add=function(t){var e=this.internal,i=e.config;return t&&(i.regions=i.regions.concat(t),e.redrawWithoutRescale()),i.regions},n.prototype.regions.remove=function(t){var e,i,n,r=this.internal,a=r.config;return t=t||{},e=r.getOption(t,"duration",a.transition_duration),i=r.getOption(t,"classes",[Y.region]),n=r.main.select("."+Y.regions).selectAll(i.map(function(t){return"."+t})),(e?n.transition().duration(e):n).style("opacity",0).remove(),a.regions=a.regions.filter(function(t){var e=!1;return!t.class||(t.class.split(" ").forEach(function(t){0<=i.indexOf(t)&&(e=!0)}),!e)}),a.regions},n.prototype.selected=function(t){var e=this.internal,i=e.d3;return i.merge(e.main.selectAll("."+Y.shapes+e.getTargetSelectorSuffix(t)).selectAll("."+Y.shape).filter(function(){return i.select(this).classed(Y.SELECTED)}).map(function(t){return t.map(function(t){var e=t.__data__;return e.data?e.data:e})}))},n.prototype.select=function(c,d,l){var u=this.internal,h=u.d3,g=u.config;g.data_selection_enabled&&u.main.selectAll("."+Y.shapes).selectAll("."+Y.shape).each(function(t,e){var i=h.select(this),n=t.data?t.data.id:t.id,r=u.getToggle(this,t).bind(u),a=g.data_selection_grouped||!c||0<=c.indexOf(n),o=!d||0<=d.indexOf(e),s=i.classed(Y.SELECTED);i.classed(Y.line)||i.classed(Y.area)||(a&&o?g.data_selection_isselectable(t)&&!s&&r(!0,i.classed(Y.SELECTED,!0),t,e):D(l)&&l&&s&&r(!1,i.classed(Y.SELECTED,!1),t,e))})},n.prototype.unselect=function(c,d){var l=this.internal,u=l.d3,h=l.config;h.data_selection_enabled&&l.main.selectAll("."+Y.shapes).selectAll("."+Y.shape).each(function(t,e){var i=u.select(this),n=t.data?t.data.id:t.id,r=l.getToggle(this,t).bind(l),a=h.data_selection_grouped||!c||0<=c.indexOf(n),o=!d||0<=d.indexOf(e),s=i.classed(Y.SELECTED);i.classed(Y.line)||i.classed(Y.area)||a&&o&&h.data_selection_isselectable(t)&&s&&r(!1,i.classed(Y.SELECTED,!1),t,e)})},n.prototype.show=function(t,e){var i,n=this.internal;t=n.mapToTargetIds(t),e=e||{},n.removeHiddenTargetIds(t),(i=n.svg.selectAll(n.selectorTargets(t))).transition().style("display","initial","important").style("opacity",1,"important").call(n.endall,function(){i.style("opacity",null).style("opacity",1)}),e.withLegend&&n.showLegend(t),n.redraw({withUpdateOrgXDomain:!0,withUpdateXDomain:!0,withLegend:!0})},n.prototype.hide=function(t,e){var i,n=this.internal;t=n.mapToTargetIds(t),e=e||{},n.addHiddenTargetIds(t),(i=n.svg.selectAll(n.selectorTargets(t))).transition().style("opacity",0,"important").call(n.endall,function(){i.style("opacity",null).style("opacity",0),i.style("display","none")}),e.withLegend&&n.hideLegend(t),n.redraw({withUpdateOrgXDomain:!0,withUpdateXDomain:!0,withLegend:!0})},n.prototype.toggle=function(t,e){var i=this,n=this.internal;n.mapToTargetIds(t).forEach(function(t){n.isTargetToShow(t)?i.hide(t,e):i.show(t,e)})},(n.prototype.tooltip=function(){}).show=function(e){var t,i,n=this.internal,r={};e.mouse?r=e.mouse:(e.data?i=e.data:void 0!==e.x&&(t=e.id?n.data.targets.filter(function(t){return t.id===e.id}):n.data.targets,i=n.filterByX(t,e.x).slice(0,1)[0]),r=i?n.getMousePosition(i):null),n.dispatchEvent("mousemove",r),n.config.tooltip_onshow.call(n,i)},n.prototype.tooltip.hide=function(){this.internal.dispatchEvent("mouseout",0),this.internal.config.tooltip_onhide.call(this)},n.prototype.transform=function(t,e){var i=this.internal,n=0<=["pie","donut"].indexOf(t)?{withTransform:!0}:null;i.transformTo(e,t,n)},l.prototype.transformTo=function(t,e,i){var n=this,r=!n.hasArcType(),a=i||{withTransitionForAxis:r};a.withTransitionForTransform=!1,n.transiting=!1,n.setTargetType(t,e),n.updateTargets(n.data.targets),n.updateAndRedraw(a)},n.prototype.x=function(t){var e=this.internal;return arguments.length&&(e.updateTargetX(e.data.targets,t),e.redraw({withUpdateOrgXDomain:!0,withUpdateXDomain:!0})),e.data.xs},n.prototype.xs=function(t){var e=this.internal;return arguments.length&&(e.updateTargetXs(e.data.targets,t),e.redraw({withUpdateOrgXDomain:!0,withUpdateXDomain:!0})),e.data.xs},(n.prototype.zoom=function(t){var e=this.internal;return t?(e.isTimeSeries()&&(t=t.map(function(t){return e.parseDate(t)})),e.config.subchart_show?e.brush.selectionAsValue(t,!0):(e.updateXDomain(null,!0,!1,!1,t),e.redraw({withY:e.config.zoom_rescale,withSubchart:!1})),e.config.zoom_onzoom.call(this,e.x.orgDomain()),t):e.x.domain()}).enable=function(t){var e=this.internal;e.config.zoom_enabled=t,e.updateAndRedraw()},n.prototype.unzoom=function(){var t=this.internal;t.config.subchart_show?t.brush.clear():(t.updateXDomain(null,!0,!1,!1,t.subX.domain()),t.redraw({withY:t.config.zoom_rescale,withSubchart:!1}))},n.prototype.zoom.max=function(t){var e=this.internal,i=e.config,n=e.d3;if(0!==t&&!t)return i.zoom_x_max;i.zoom_x_max=n.max([e.orgXDomain[1],t])},n.prototype.zoom.min=function(t){var e=this.internal,i=e.config,n=e.d3;if(0!==t&&!t)return i.zoom_x_min;i.zoom_x_min=n.min([e.orgXDomain[0],t])},n.prototype.zoom.range=function(t){if(!arguments.length)return{max:this.domain.max(),min:this.domain.min()};D(t.max)&&this.domain.max(t.max),D(t.min)&&this.domain.min(t.min)},l.prototype.initPie=function(){var t=this,e=t.d3;t.pie=e.pie().value(function(t){return t.values.reduce(function(t,e){return t+e.value},0)});var i=t.getOrderFunction();if(i&&(t.isOrderAsc()||t.isOrderDesc())){var n=i;i=function(t,e){return-1*n(t,e)}}t.pie.sort(i||null)},l.prototype.updateRadius=function(){var t=this,e=t.config,i=e.gauge_width||e.donut_width,n=t.filterTargetsToShow(t.data.targets).length*t.config.gauge_arcs_minWidth;t.radiusExpanded=Math.min(t.arcWidth,t.arcHeight)/2*(t.hasType("gauge")?.85:1),t.radius=.95*t.radiusExpanded,t.innerRadiusRatio=i?(t.radius-i)/t.radius:.6,t.innerRadius=t.hasType("donut")||t.hasType("gauge")?t.radius*t.innerRadiusRatio:0,t.gaugeArcWidth=i||(n<=t.radius-t.innerRadius?t.radius-t.innerRadius:n<=t.radius?n:t.radius)},l.prototype.updateArc=function(){var t=this;t.svgArc=t.getSvgArc(),t.svgArcExpanded=t.getSvgArcExpanded(),t.svgArcExpandedSub=t.getSvgArcExpanded(.98)},l.prototype.updateAngle=function(e){var t,i,n,r,a=this,o=a.config,s=!1,c=0;return o?(a.pie(a.filterTargetsToShow(a.data.targets)).forEach(function(t){s||t.data.id!==e.data.id||(s=!0,(e=t).index=c),c++}),isNaN(e.startAngle)&&(e.startAngle=0),isNaN(e.endAngle)&&(e.endAngle=e.startAngle),a.isGaugeType(e.data)&&(t=o.gauge_min,i=o.gauge_max,n=Math.PI*(o.gauge_fullCircle?2:1)/(i-t),r=e.value<t?0:e.value<i?e.value-t:i-t,e.startAngle=o.gauge_startingAngle,e.endAngle=e.startAngle+n*r),s?e:null):null},l.prototype.getSvgArc=function(){var n=this,e=n.hasType("gauge"),i=n.gaugeArcWidth/n.filterTargetsToShow(n.data.targets).length,r=n.d3.arc().outerRadius(function(t){return e?n.radius-i*t.index:n.radius}).innerRadius(function(t){return e?n.radius-i*(t.index+1):n.innerRadius}),t=function(t,e){var i;return e?r(t):(i=n.updateAngle(t))?r(i):"M 0 0"};return t.centroid=r.centroid,t},l.prototype.getSvgArcExpanded=function(e){e=e||1;var i=this,n=i.hasType("gauge"),r=i.gaugeArcWidth/i.filterTargetsToShow(i.data.targets).length,a=Math.min(i.radiusExpanded*e-i.radius,.8*r-100*(1-e)),o=i.d3.arc().outerRadius(function(t){return n?i.radius-r*t.index+a:i.radiusExpanded*e}).innerRadius(function(t){return n?i.radius-r*(t.index+1):i.innerRadius});return function(t){var e=i.updateAngle(t);return e?o(e):"M 0 0"}},l.prototype.getArc=function(t,e,i){return i||this.isArcType(t.data)?this.svgArc(t,e):"M 0 0"},l.prototype.transformForArcLabel=function(t){var e,i,n,r,a,o=this,s=o.config,c=o.updateAngle(t),d="",l=o.hasType("gauge");if(c&&!l)e=this.svgArc.centroid(c),i=isNaN(e[0])?0:e[0],n=isNaN(e[1])?0:e[1],r=Math.sqrt(i*i+n*n),d="translate("+i*(a=o.hasType("donut")&&s.donut_label_ratio?h(s.donut_label_ratio)?s.donut_label_ratio(t,o.radius,r):s.donut_label_ratio:o.hasType("pie")&&s.pie_label_ratio?h(s.pie_label_ratio)?s.pie_label_ratio(t,o.radius,r):s.pie_label_ratio:o.radius&&r?(.375<36/o.radius?1.175-36/o.radius:.8)*o.radius/r:0)+","+n*a+")";else if(c&&l&&1<o.filterTargetsToShow(o.data.targets).length){var u=Math.sin(c.endAngle-Math.PI/2);d="translate("+(i=Math.cos(c.endAngle-Math.PI/2)*(o.radiusExpanded+25))+","+(n=u*(o.radiusExpanded+15-Math.abs(10*u))+3)+")"}return d},l.prototype.getArcRatio=function(t){var e=this.config,i=Math.PI*(this.hasType("gauge")&&!e.gauge_fullCircle?1:2);return t?(t.endAngle-t.startAngle)/i:null},l.prototype.convertToArcData=function(t){return this.addName({id:t.data.id,value:t.value,ratio:this.getArcRatio(t),index:t.index})},l.prototype.textForArcLabel=function(t){var e,i,n,r,a,o=this;return o.shouldShowArcLabel()?(i=(e=o.updateAngle(t))?e.value:null,n=o.getArcRatio(e),r=t.data.id,o.hasType("gauge")||o.meetsArcLabelThreshold(n)?(a=o.getArcLabelFormat())?a(i,n,r):o.defaultArcValueFormat(i,n):""):""},l.prototype.textForGaugeMinMax=function(t,e){var i=this.getGaugeLabelExtents();return i?i(t,e):t},l.prototype.expandArc=function(t){var e,i=this;i.transiting?e=window.setInterval(function(){i.transiting||(window.clearInterval(e),0<i.legend.selectAll(".c3-legend-item-focused").size()&&i.expandArc(t))},10):(t=i.mapToTargetIds(t),i.svg.selectAll(i.selectorTargets(t,"."+Y.chartArc)).each(function(t){i.shouldExpand(t.data.id)&&i.d3.select(this).selectAll("path").transition().duration(i.expandDuration(t.data.id)).attr("d",i.svgArcExpanded).transition().duration(2*i.expandDuration(t.data.id)).attr("d",i.svgArcExpandedSub).each(function(t){i.isDonutType(t.data)})}))},l.prototype.unexpandArc=function(t){var e=this;e.transiting||(t=e.mapToTargetIds(t),e.svg.selectAll(e.selectorTargets(t,"."+Y.chartArc)).selectAll("path").transition().duration(function(t){return e.expandDuration(t.data.id)}).attr("d",e.svgArc),e.svg.selectAll("."+Y.arc))},l.prototype.expandDuration=function(t){var e=this.config;return this.isDonutType(t)?e.donut_expand_duration:this.isGaugeType(t)?e.gauge_expand_duration:this.isPieType(t)?e.pie_expand_duration:50},l.prototype.shouldExpand=function(t){var e=this.config;return this.isDonutType(t)&&e.donut_expand||this.isGaugeType(t)&&e.gauge_expand||this.isPieType(t)&&e.pie_expand},l.prototype.shouldShowArcLabel=function(){var t=this.config,e=!0;return this.hasType("donut")?e=t.donut_label_show:this.hasType("pie")&&(e=t.pie_label_show),e},l.prototype.meetsArcLabelThreshold=function(t){var e=this.config;return(this.hasType("donut")?e.donut_label_threshold:e.pie_label_threshold)<=t},l.prototype.getArcLabelFormat=function(){var t=this.config,e=t.pie_label_format;return this.hasType("gauge")?e=t.gauge_label_format:this.hasType("donut")&&(e=t.donut_label_format),e},l.prototype.getGaugeLabelExtents=function(){return this.config.gauge_label_extents},l.prototype.getArcTitle=function(){return this.hasType("donut")?this.config.donut_title:""},l.prototype.updateTargetsForArc=function(t){var e,i=this,n=i.main,r=i.classChartArc.bind(i),a=i.classArcs.bind(i),o=i.classFocus.bind(i);(e=n.select("."+Y.chartArcs).selectAll("."+Y.chartArc).data(i.pie(t)).attr("class",function(t){return r(t)+o(t.data)}).enter().append("g").attr("class",r)).append("g").attr("class",a),e.append("text").attr("dy",i.hasType("gauge")?"-.1em":".35em").style("opacity",0).style("text-anchor","middle").style("pointer-events","none")},l.prototype.initArc=function(){var t=this;t.arcs=t.main.select("."+Y.chart).append("g").attr("class",Y.chartArcs).attr("transform",t.getTranslate("arc")),t.arcs.append("text").attr("class",Y.chartArcsTitle).style("text-anchor","middle").text(t.getArcTitle())},l.prototype.redrawArc=function(t,e,i){var n,r,a,o,l=this,u=l.d3,s=l.config,c=l.main,d=l.hasType("gauge");if(r=(n=c.selectAll("."+Y.arcs).selectAll("."+Y.arc).data(l.arcData.bind(l))).enter().append("path").attr("class",l.classArc.bind(l)).style("fill",function(t){return l.color(t.data)}).style("cursor",function(t){return s.interaction_enabled&&s.data_selection_isselectable(t)?"pointer":null}).each(function(t){l.isGaugeType(t.data)&&(t.startAngle=t.endAngle=s.gauge_startingAngle),this._current=t}).merge(n),d&&(o=(a=c.selectAll("."+Y.arcs).selectAll("."+Y.arcLabelLine).data(l.arcData.bind(l))).enter().append("rect").attr("class",function(t){return Y.arcLabelLine+" "+Y.target+" "+Y.target+"-"+t.data.id}).merge(a),1===l.filterTargetsToShow(l.data.targets).length?o.style("display","none"):o.style("fill",function(t){return 0<s.color_pattern.length?l.levelColor(t.data.values[0].value):l.color(t.data)}).style("display",s.gauge_labelLine_show?"":"none").each(function(t){var e=0,i=0,n=0,r="";if(l.hiddenTargetIds.indexOf(t.data.id)<0){var a=l.updateAngle(t),o=l.gaugeArcWidth/l.filterTargetsToShow(l.data.targets).length*(a.index+1),s=a.endAngle-Math.PI/2,c=l.radius-o,d=s-(0===c?0:1/c);e=l.radiusExpanded-l.radius+o,i=Math.cos(d)*c,n=Math.sin(d)*c,r="rotate("+180*s/Math.PI+", "+i+", "+n+")"}u.select(this).attr("x",i).attr("y",n).attr("width",e).attr("height",2).attr("transform",r).style("stroke-dasharray","0, "+(e+2)+", 0")})),r.attr("transform",function(t){return!l.isGaugeType(t.data)&&i?"scale(0)":""}).on("mouseover",s.interaction_enabled?function(t){var e,i;l.transiting||(e=l.updateAngle(t))&&(i=l.convertToArcData(e),l.expandArc(e.data.id),l.api.focus(e.data.id),l.toggleFocusLegend(e.data.id,!0),l.config.data_onmouseover(i,this))}:null).on("mousemove",s.interaction_enabled?function(t){var e,i=l.updateAngle(t);i&&(e=[l.convertToArcData(i)],l.showTooltip(e,this))}:null).on("mouseout",s.interaction_enabled?function(t){var e,i;l.transiting||(e=l.updateAngle(t))&&(i=l.convertToArcData(e),l.unexpandArc(e.data.id),l.api.revert(),l.revertLegend(),l.hideTooltip(),l.config.data_onmouseout(i,this))}:null).on("click",s.interaction_enabled?function(t,e){var i,n=l.updateAngle(t);n&&(i=l.convertToArcData(n),l.toggleShape&&l.toggleShape(this,i,e),l.config.data_onclick.call(l.api,i,this))}:null).each(function(){l.transiting=!0}).transition().duration(t).attrTween("d",function(i){var n,t=l.updateAngle(i);return t?(isNaN(this._current.startAngle)&&(this._current.startAngle=0),isNaN(this._current.endAngle)&&(this._current.endAngle=this._current.startAngle),n=u.interpolate(this._current,t),this._current=n(0),function(t){var e=n(t);return e.data=i.data,l.getArc(e,!0)}):function(){return"M 0 0"}}).attr("transform",i?"scale(1)":"").style("fill",function(t){return l.levelColor?l.levelColor(t.data.values[0].value):l.color(t.data.id)}).call(l.endall,function(){l.transiting=!1}),n.exit().transition().duration(e).style("opacity",0).remove(),c.selectAll("."+Y.chartArc).select("text").style("opacity",0).attr("class",function(t){return l.isGaugeType(t.data)?Y.gaugeValue:""}).text(l.textForArcLabel.bind(l)).attr("transform",l.transformForArcLabel.bind(l)).style("font-size",function(t){return l.isGaugeType(t.data)&&1===l.filterTargetsToShow(l.data.targets).length?Math.round(l.radius/5)+"px":""}).transition().duration(t).style("opacity",function(t){return l.isTargetToShow(t.data.id)&&l.isArcType(t.data)?1:0}),c.select("."+Y.chartArcsTitle).style("opacity",l.hasType("donut")||d?1:0),d){var h=0,g=l.arcs.select("g."+Y.chartArcsBackground).selectAll("path."+Y.chartArcsBackground).data(l.data.targets);g.enter().append("path").attr("class",function(t,e){return Y.chartArcsBackground+" "+Y.chartArcsBackground+"-"+e}).merge(g).attr("d",function(t){if(0<=l.hiddenTargetIds.indexOf(t.id))return"M 0 0";var e={data:[{value:s.gauge_max}],startAngle:s.gauge_startingAngle,endAngle:-1*s.gauge_startingAngle*(s.gauge_fullCircle?Math.PI:1),index:h++};return l.getArc(e,!0,!0)}),g.exit().remove(),l.arcs.select("."+Y.chartArcsGaugeUnit).attr("dy",".75em").text(s.gauge_label_show?s.gauge_units:""),l.arcs.select("."+Y.chartArcsGaugeMin).attr("dx",-1*(l.innerRadius+(l.radius-l.innerRadius)/(s.gauge_fullCircle?1:2))+"px").attr("dy","1.2em").text(s.gauge_label_show?l.textForGaugeMinMax(s.gauge_min,!1):""),l.arcs.select("."+Y.chartArcsGaugeMax).attr("dx",l.innerRadius+(l.radius-l.innerRadius)/(s.gauge_fullCircle?1:2)+"px").attr("dy","1.2em").text(s.gauge_label_show?l.textForGaugeMinMax(s.gauge_max,!0):"")}},l.prototype.initGauge=function(){var t=this.arcs;this.hasType("gauge")&&(t.append("g").attr("class",Y.chartArcsBackground),t.append("text").attr("class",Y.chartArcsGaugeUnit).style("text-anchor","middle").style("pointer-events","none"),t.append("text").attr("class",Y.chartArcsGaugeMin).style("text-anchor","middle").style("pointer-events","none"),t.append("text").attr("class",Y.chartArcsGaugeMax).style("text-anchor","middle").style("pointer-events","none"))},l.prototype.getGaugeLabelHeight=function(){return this.config.gauge_label_show?20:0},l.prototype.hasCaches=function(t){for(var e=0;e<t.length;e++)if(!(t[e]in this.cache))return!1;return!0},l.prototype.addCache=function(t,e){this.cache[t]=this.cloneTarget(e)},l.prototype.getCaches=function(t){var e,i=[];for(e=0;e<t.length;e++)t[e]in this.cache&&i.push(this.cloneTarget(this.cache[t[e]]));return i},l.prototype.categoryName=function(t){var e=this.config;return t<e.axis_x_categories.length?e.axis_x_categories[t]:t},l.prototype.generateTargetClass=function(t){return 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this.classShapes(t)+this.generateClass(Y.bars,t.id)},l.prototype.classArc=function(t){return this.classShape(t.data)+this.generateClass(Y.arc,t.data.id)},l.prototype.classArcs=function(t){return this.classShapes(t.data)+this.generateClass(Y.arcs,t.data.id)},l.prototype.classArea=function(t){return this.classShape(t)+this.generateClass(Y.area,t.id)},l.prototype.classAreas=function(t){return this.classShapes(t)+this.generateClass(Y.areas,t.id)},l.prototype.classRegion=function(t,e){return this.generateClass(Y.region,e)+" "+("class"in t?t.class:"")},l.prototype.classEvent=function(t){return this.generateClass(Y.eventRect,t.index)},l.prototype.classTarget=function(t){var e=this.config.data_classes[t],i="";return e&&(i=" "+Y.target+"-"+e),this.generateClass(Y.target,t)+i},l.prototype.classFocus=function(t){return this.classFocused(t)+this.classDefocused(t)},l.prototype.classFocused=function(t){return" 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i.selectorTarget(t,e)}):null},l.prototype.selectorLegend=function(t){return"."+Y.legendItem+this.getTargetSelectorSuffix(t)},l.prototype.selectorLegends=function(t){var e=this;return t&&t.length?t.map(function(t){return e.selectorLegend(t)}):null},l.prototype.getClipPath=function(t){return"url("+(0<=window.navigator.appVersion.toLowerCase().indexOf("msie 9.")?"":document.URL.split("#")[0])+"#"+t+")"},l.prototype.appendClip=function(t,e){return t.append("clipPath").attr("id",e).append("rect")},l.prototype.getAxisClipX=function(t){var e=Math.max(30,this.margin.left);return t?-(1+e):-(e-1)},l.prototype.getAxisClipY=function(t){return t?-20:-this.margin.top},l.prototype.getXAxisClipX=function(){return this.getAxisClipX(!this.config.axis_rotated)},l.prototype.getXAxisClipY=function(){return this.getAxisClipY(!this.config.axis_rotated)},l.prototype.getYAxisClipX=function(){return this.config.axis_y_inner?-1:this.getAxisClipX(this.config.axis_rotated)},l.prototype.getYAxisClipY=function(){return this.getAxisClipY(this.config.axis_rotated)},l.prototype.getAxisClipWidth=function(t){var e=Math.max(30,this.margin.left),i=Math.max(30,this.margin.right);return t?this.width+2+e+i:this.margin.left+20},l.prototype.getAxisClipHeight=function(t){return(t?this.margin.bottom:this.margin.top+this.height)+20},l.prototype.getXAxisClipWidth=function(){return this.getAxisClipWidth(!this.config.axis_rotated)},l.prototype.getXAxisClipHeight=function(){return this.getAxisClipHeight(!this.config.axis_rotated)},l.prototype.getYAxisClipWidth=function(){return this.getAxisClipWidth(this.config.axis_rotated)+(this.config.axis_y_inner?20:0)},l.prototype.getYAxisClipHeight=function(){return this.getAxisClipHeight(this.config.axis_rotated)},l.prototype.generateColor=function(){var t=this.config,e=this.d3,n=t.data_colors,r=C(t.color_pattern)?t.color_pattern:e.schemeCategory10,a=t.data_color,o=[];return function(t){var e,i=t.id||t.data&&t.data.id||t;return n[i]instanceof Function?e=n[i](t):n[i]?e=n[i]:(o.indexOf(i)<0&&o.push(i),e=r[o.indexOf(i)%r.length],n[i]=e),a instanceof Function?a(e,t):e}},l.prototype.generateLevelColor=function(){var t=this.config,n=t.color_pattern,e=t.color_threshold,r="value"===e.unit,a=e.values&&e.values.length?e.values:[],o=e.max||100;return C(t.color_threshold)?function(t){var e,i=n[n.length-1];for(e=0;e<a.length;e++)if((r?t:100*t/o)<a[e]){i=n[e];break}return i}:null},l.prototype.getDefaultConfig=function(){var e={bindto:"#chart",svg_classname:void 0,size_width:void 0,size_height:void 0,padding_left:void 0,padding_right:void 0,padding_top:void 0,padding_bottom:void 0,resize_auto:!0,zoom_enabled:!1,zoom_initialRange:void 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0,data_selection_enabled:!1,data_selection_grouped:!1,data_selection_isselectable:function(){return!0},data_selection_multiple:!0,data_selection_draggable:!1,data_onclick:function(){},data_onmouseover:function(){},data_onmouseout:function(){},data_onselected:function(){},data_onunselected:function(){},data_url:void 0,data_headers:void 0,data_json:void 0,data_rows:void 0,data_columns:void 0,data_mimeType:void 0,data_keys:void 0,data_empty_label_text:"",subchart_show:!1,subchart_size_height:60,subchart_axis_x_show:!0,subchart_onbrush:function(){},color_pattern:[],color_threshold:{},legend_show:!0,legend_hide:!1,legend_position:"bottom",legend_inset_anchor:"top-left",legend_inset_x:10,legend_inset_y:0,legend_inset_step:void 0,legend_item_onclick:void 0,legend_item_onmouseover:void 0,legend_item_onmouseout:void 0,legend_equally:!1,legend_padding:0,legend_item_tile_width:10,legend_item_tile_height:10,axis_rotated:!1,axis_x_show:!0,axis_x_type:"indexed",axis_x_localtime:!0,axis_x_categories:[],axis_x_tick_centered:!1,axis_x_tick_format:void 0,axis_x_tick_culling:{},axis_x_tick_culling_max:10,axis_x_tick_count:void 0,axis_x_tick_fit:!0,axis_x_tick_values:null,axis_x_tick_rotate:0,axis_x_tick_outer:!0,axis_x_tick_multiline:!0,axis_x_tick_multilineMax:0,axis_x_tick_width:null,axis_x_max:void 0,axis_x_min:void 0,axis_x_padding:{},axis_x_height:void 0,axis_x_selection:void 0,axis_x_label:{},axis_x_inner:void 0,axis_y_show:!0,axis_y_type:void 0,axis_y_max:void 0,axis_y_min:void 0,axis_y_inverted:!1,axis_y_center:void 0,axis_y_inner:void 0,axis_y_label:{},axis_y_tick_format:void 0,axis_y_tick_outer:!0,axis_y_tick_values:null,axis_y_tick_rotate:0,axis_y_tick_count:void 0,axis_y_tick_time_type:void 0,axis_y_tick_time_interval:void 0,axis_y_padding:{},axis_y_default:void 0,axis_y2_show:!1,axis_y2_max:void 0,axis_y2_min:void 0,axis_y2_inverted:!1,axis_y2_center:void 0,axis_y2_inner:void 0,axis_y2_label:{},axis_y2_tick_format:void 0,axis_y2_tick_outer:!0,axis_y2_tick_values:null,axis_y2_tick_count:void 0,axis_y2_padding:{},axis_y2_default:void 0,grid_x_show:!1,grid_x_type:"tick",grid_x_lines:[],grid_y_show:!1,grid_y_lines:[],grid_y_ticks:10,grid_focus_show:!0,grid_lines_front:!0,point_show:!0,point_r:2.5,point_sensitivity:10,point_focus_expand_enabled:!0,point_focus_expand_r:void 0,point_select_r:void 0,line_connectNull:!1,line_step_type:"step",bar_width:void 0,bar_width_ratio:.6,bar_width_max:void 0,bar_zerobased:!0,bar_space:0,area_zerobased:!0,area_above:!1,pie_label_show:!0,pie_label_format:void 0,pie_label_threshold:.05,pie_label_ratio:void 0,pie_expand:{},pie_expand_duration:50,gauge_fullCircle:!1,gauge_label_show:!0,gauge_labelLine_show:!0,gauge_label_format:void 0,gauge_min:0,gauge_max:100,gauge_startingAngle:-1*Math.PI/2,gauge_label_extents:void 0,gauge_units:void 0,gauge_width:void 0,gauge_arcs_minWidth:5,gauge_expand:{},gauge_expand_duration:50,donut_label_show:!0,donut_label_format:void 0,donut_label_threshold:.05,donut_label_ratio:void 0,donut_width:void 0,donut_title:"",donut_expand:{},donut_expand_duration:50,spline_interpolation_type:"cardinal",regions:[],tooltip_show:!0,tooltip_grouped:!0,tooltip_order:void 0,tooltip_format_title:void 0,tooltip_format_name:void 0,tooltip_format_value:void 0,tooltip_position:void 0,tooltip_contents:function(t,e,i,n){return this.getTooltipContent?this.getTooltipContent(t,e,i,n):""},tooltip_init_show:!1,tooltip_init_x:0,tooltip_init_position:{top:"0px",left:"50px"},tooltip_onshow:function(){},tooltip_onhide:function(){},title_text:void 0,title_padding:{top:0,right:0,bottom:0,left:0},title_position:"top-center"};return Object.keys(this.additionalConfig).forEach(function(t){e[t]=this.additionalConfig[t]},this),e},l.prototype.additionalConfig={},l.prototype.loadConfig=function(e){var i,n,r,a=this.config;Object.keys(a).forEach(function(t){i=e,n=t.split("_"),r=function t(){var e=n.shift();return e&&i&&"object"===(void 0===i?"undefined":s(i))&&e in i?(i=i[e],t()):e?void 0:i}(),D(r)&&(a[t]=r)})},l.prototype.convertUrlToData=function(t,e,i,n,r){var a,o,s=this,c=e||"csv";"json"===c?(a=s.d3.json,o=s.convertJsonToData):(a="tsv"===c?s.d3.tsv:s.d3.csv,o=s.convertXsvToData),a(t,i).then(function(t){r.call(s,o.call(s,t,n))}).catch(function(t){throw t})},l.prototype.convertXsvToData=function(t){var e=t.columns;return 0===t.length?{keys:e,rows:[e.reduce(function(t,e){return Object.assign(t,(r=null,(n=e)in(i={})?Object.defineProperty(i,n,{value:r,enumerable:!0,configurable:!0,writable:!0}):i[n]=r,i));var i,n,r},{})]}:{keys:e,rows:[].concat(t)}},l.prototype.convertJsonToData=function(e,t){var r,i,a=this,o=[];return t?(t.x?(r=t.value.concat(t.x),a.config.data_x=t.x):r=t.value,o.push(r),e.forEach(function(i){var n=[];r.forEach(function(t){var e=a.findValueInJson(i,t);v(e)&&(e=null),n.push(e)}),o.push(n)}),i=a.convertRowsToData(o)):(Object.keys(e).forEach(function(t){o.push([t].concat(e[t]))}),i=a.convertColumnsToData(o)),i},l.prototype.findValueInJson=function(t,e){for(var i=(e=(e=e.replace(/\[(\w+)\]/g,".$1")).replace(/^\./,"")).split("."),n=0;n<i.length;++n){var r=i[n];if(!(r in t))return;t=t[r]}return t},l.prototype.convertRowsToData=function(t){for(var e=[],i=t[0],n=1;n<t.length;n++){for(var r={},a=0;a<t[n].length;a++){if(v(t[n][a]))throw new Error("Source data is missing a component at ("+n+","+a+")!");r[i[a]]=t[n][a]}e.push(r)}return{keys:i,rows:e}},l.prototype.convertColumnsToData=function(t){for(var e=[],i=[],n=0;n<t.length;n++){for(var r=t[n][0],a=1;a<t[n].length;a++){if(v(e[a-1])&&(e[a-1]={}),v(t[n][a]))throw new Error("Source data is missing a component at ("+n+","+a+")!");e[a-1][r]=t[n][a]}i.push(r)}return{keys:i,rows:e}},l.prototype.convertDataToTargets=function(t,n){var e,i,r,a,c=this,d=c.config;return o(t)?a=Object.keys(t[0]):(a=t.keys,t=t.rows),i=a.filter(c.isNotX,c),r=a.filter(c.isX,c),i.forEach(function(i){var e=c.getXKey(i);c.isCustomX()||c.isTimeSeries()?0<=r.indexOf(e)?c.data.xs[i]=(n&&c.data.xs[i]?c.data.xs[i]:[]).concat(t.map(function(t){return t[e]}).filter(P).map(function(t,e){return c.generateTargetX(t,i,e)})):d.data_x?c.data.xs[i]=c.getOtherTargetXs():C(d.data_xs)&&(c.data.xs[i]=c.getXValuesOfXKey(e,c.data.targets)):c.data.xs[i]=t.map(function(t,e){return e})}),i.forEach(function(t){if(!c.data.xs[t])throw new Error('x is not defined for id = "'+t+'".')}),(e=i.map(function(a,o){var s=d.data_idConverter(a);return{id:s,id_org:a,values:t.map(function(t,e){var i,n=t[c.getXKey(a)],r=null===t[a]||isNaN(t[a])?null:+t[a];return c.isCustomX()&&c.isCategorized()&&!v(n)?(0===o&&0===e&&(d.axis_x_categories=[]),-1===(i=d.axis_x_categories.indexOf(n))&&(i=d.axis_x_categories.length,d.axis_x_categories.push(n))):i=c.generateTargetX(n,a,e),(v(t[a])||c.data.xs[a].length<=e)&&(i=void 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i,n=this;return(t&&C(t)?n.mapToIds(t):[]).forEach(function(t){n.getXKey(t)===e&&(i=n.data.xs[t])}),i},l.prototype.getXValue=function(t,e){return t in this.data.xs&&this.data.xs[t]&&P(this.data.xs[t][e])?this.data.xs[t][e]:e},l.prototype.getOtherTargetXs=function(){var t=Object.keys(this.data.xs);return t.length?this.data.xs[t[0]]:null},l.prototype.getOtherTargetX=function(t){var e=this.getOtherTargetXs();return e&&t<e.length?e[t]:null},l.prototype.addXs=function(e){var i=this;Object.keys(e).forEach(function(t){i.config.data_xs[t]=e[t]})},l.prototype.addName=function(t){var e;return t&&(e=this.config.data_names[t.id],t.name=void 0!==e?e:t.id),t},l.prototype.getValueOnIndex=function(t,e){var i=t.filter(function(t){return t.index===e});return i.length?i[0]:null},l.prototype.updateTargetX=function(t,n){var r=this;t.forEach(function(i){i.values.forEach(function(t,e){t.x=r.generateTargetX(n[e],i.id,e)}),r.data.xs[i.id]=n})},l.prototype.updateTargetXs=function(t,e){var 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this.hiddenLegendIds.indexOf(t)<0},l.prototype.filterTargetsToShow=function(t){var e=this;return t.filter(function(t){return e.isTargetToShow(t.id)})},l.prototype.mapTargetsToUniqueXs=function(t){var e=this.d3.set(this.d3.merge(t.map(function(t){return t.values.map(function(t){return+t.x})}))).values();return(e=this.isTimeSeries()?e.map(function(t){return new Date(+t)}):e.map(function(t){return+t})).sort(function(t,e){return t<e?-1:e<t?1:e<=t?0:NaN})},l.prototype.addHiddenTargetIds=function(t){t=t instanceof Array?t:new Array(t);for(var e=0;e<t.length;e++)this.hiddenTargetIds.indexOf(t[e])<0&&(this.hiddenTargetIds=this.hiddenTargetIds.concat(t[e]))},l.prototype.removeHiddenTargetIds=function(e){this.hiddenTargetIds=this.hiddenTargetIds.filter(function(t){return e.indexOf(t)<0})},l.prototype.addHiddenLegendIds=function(t){t=t instanceof Array?t:new Array(t);for(var e=0;e<t.length;e++)this.hiddenLegendIds.indexOf(t[e])<0&&(this.hiddenLegendIds=this.hiddenLegendIds.concat(t[e]))},l.prototype.removeHiddenLegendIds=function(e){this.hiddenLegendIds=this.hiddenLegendIds.filter(function(t){return e.indexOf(t)<0})},l.prototype.getValuesAsIdKeyed=function(t){var i={};return t.forEach(function(e){i[e.id]=[],e.values.forEach(function(t){i[e.id].push(t.value)})}),i},l.prototype.checkValueInTargets=function(t,e){var i,n,r,a=Object.keys(t);for(i=0;i<a.length;i++)for(r=t[a[i]].values,n=0;n<r.length;n++)if(e(r[n].value))return!0;return!1},l.prototype.hasNegativeValueInTargets=function(t){return this.checkValueInTargets(t,function(t){return t<0})},l.prototype.hasPositiveValueInTargets=function(t){return this.checkValueInTargets(t,function(t){return 0<t})},l.prototype.isOrderDesc=function(){var t=this.config;return"string"==typeof t.data_order&&"desc"===t.data_order.toLowerCase()},l.prototype.isOrderAsc=function(){var t=this.config;return"string"==typeof t.data_order&&"asc"===t.data_order.toLowerCase()},l.prototype.getOrderFunction=function(){var t=this.config,r=this.isOrderAsc(),e=this.isOrderDesc();if(r||e){var a=function(t,e){return t+Math.abs(e.value)};return function(t,e){var i=t.values.reduce(a,0),n=e.values.reduce(a,0);return r?n-i:i-n}}if(h(t.data_order))return t.data_order;if(o(t.data_order)){var i=t.data_order;return function(t,e){return i.indexOf(t.id)-i.indexOf(e.id)}}},l.prototype.orderTargets=function(t){var e=this.getOrderFunction();return e&&t.sort(e),t},l.prototype.filterByX=function(t,e){return this.d3.merge(t.map(function(t){return t.values})).filter(function(t){return t.x-e==0})},l.prototype.filterRemoveNull=function(t){return t.filter(function(t){return P(t.value)})},l.prototype.filterByXDomain=function(t,e){return t.map(function(t){return{id:t.id,id_org:t.id_org,values:t.values.filter(function(t){return e[0]<=t.x&&t.x<=e[1]})}})},l.prototype.hasDataLabel=function(){var t=this.config;return!("boolean"!=typeof 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i.selectorTarget(t)})).transition().style("opacity",0).remove().call(i.endall,e),t.forEach(function(e){i.withoutFadeIn[e]=!1,i.legend&&i.legend.selectAll("."+Y.legendItem+i.getTargetSelectorSuffix(e)).remove(),i.data.targets=i.data.targets.filter(function(t){return t.id!==e})})):e()},l.prototype.getYDomainMin=function(t){var e,i,n,r,a,o,s=this,c=s.config,d=s.mapToIds(t),l=s.getValuesAsIdKeyed(t);if(0<c.data_groups.length)for(o=s.hasNegativeValueInTargets(t),e=0;e<c.data_groups.length;e++)if(0!==(r=c.data_groups[e].filter(function(t){return 0<=d.indexOf(t)})).length)for(n=r[0],o&&l[n]&&l[n].forEach(function(t,e){l[n][e]=t<0?t:0}),i=1;i<r.length;i++)a=r[i],l[a]&&l[a].forEach(function(t,e){s.axis.getId(a)!==s.axis.getId(n)||!l[n]||o&&0<+t||(l[n][e]+=+t)});return s.d3.min(Object.keys(l).map(function(t){return s.d3.min(l[t])}))},l.prototype.getYDomainMax=function(t){var e,i,n,r,a,o,s=this,c=s.config,d=s.mapToIds(t),l=s.getValuesAsIdKeyed(t);if(0<c.data_groups.length)for(o=s.hasPositiveValueInTargets(t),e=0;e<c.data_groups.length;e++)if(0!==(r=c.data_groups[e].filter(function(t){return 0<=d.indexOf(t)})).length)for(n=r[0],o&&l[n]&&l[n].forEach(function(t,e){l[n][e]=0<t?t:0}),i=1;i<r.length;i++)a=r[i],l[a]&&l[a].forEach(function(t,e){s.axis.getId(a)!==s.axis.getId(n)||!l[n]||o&&+t<0||(l[n][e]+=+t)});return s.d3.max(Object.keys(l).map(function(t){return s.d3.max(l[t])}))},l.prototype.getYDomain=function(t,e,i){var n,r,a,o,s,c,d,l,u,h,g=this,p=g.config,f=t.filter(function(t){return 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D(i.axis_x_max)?e.isTimeSeries()?this.parseDate(i.axis_x_max):i.axis_x_max:e.d3.max(t,function(t){return e.d3.max(t.values,function(t){return t.x})})},l.prototype.getXDomainPadding=function(t){var e,i,n,r,a=this.config,o=t[1]-t[0];return i=this.isCategorized()?0:this.hasType("bar")?1<(e=this.getMaxDataCount())?o/(e-1)/2:.5:.01*o,"object"===s(a.axis_x_padding)&&C(a.axis_x_padding)?(n=P(a.axis_x_padding.left)?a.axis_x_padding.left:i,r=P(a.axis_x_padding.right)?a.axis_x_padding.right:i):n=r="number"==typeof a.axis_x_padding?a.axis_x_padding:i,{left:n,right:r}},l.prototype.getXDomain=function(t){var e=this,i=[e.getXDomainMin(t),e.getXDomainMax(t)],n=i[0],r=i[1],a=e.getXDomainPadding(i),o=0,s=0;return n-r!=0||e.isCategorized()||(e.isTimeSeries()?(n=new Date(.5*n.getTime()),r=new Date(1.5*r.getTime())):(n=0===n?1:.5*n,r=0===r?-1:1.5*r)),(n||0===n)&&(o=e.isTimeSeries()?new Date(n.getTime()-a.left):n-a.left),(r||0===r)&&(s=e.isTimeSeries()?new 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e,i,n,r,h,g,p,f,_=this,a=_.config,o=_.main,x=_.d3;_.hasArcType()||a.data_selection_enabled&&a.data_selection_multiple&&(e=_.dragStart[0],i=_.dragStart[1],n=t[0],r=t[1],h=Math.min(e,n),g=Math.max(e,n),p=a.data_selection_grouped?_.margin.top:Math.min(i,r),f=a.data_selection_grouped?_.height:Math.max(i,r),o.select("."+Y.dragarea).attr("x",h).attr("y",p).attr("width",g-h).attr("height",f-p),o.selectAll("."+Y.shapes).selectAll("."+Y.shape).filter(function(t){return a.data_selection_isselectable(t)}).each(function(t,e){var i,n,r,a,o,s,c=x.select(this),d=c.classed(Y.SELECTED),l=c.classed(Y.INCLUDED),u=!1;if(c.classed(Y.circle))i=1*c.attr("cx"),n=1*c.attr("cy"),o=_.togglePoint,u=h<i&&i<g&&p<n&&n<f;else{if(!c.classed(Y.bar))return;i=(s=y(this)).x,n=s.y,r=s.width,a=s.height,o=_.togglePath,u=!(g<i||i+r<h||f<n||n+a<p)}u^l&&(c.classed(Y.INCLUDED,!l),c.classed(Y.SELECTED,!d),o.call(_,!d,c,t,e))}))},l.prototype.dragstart=function(t){var e=this,i=e.config;e.hasArcType()||i.data_selection_enabled&&(e.dragStart=t,e.main.select("."+Y.chart).append("rect").attr("class",Y.dragarea).style("opacity",.1),e.dragging=!0)},l.prototype.dragend=function(){var t=this,e=t.config;t.hasArcType()||e.data_selection_enabled&&(t.main.select("."+Y.dragarea).transition().duration(100).style("opacity",0).remove(),t.main.selectAll("."+Y.shape).classed(Y.INCLUDED,!1),t.dragging=!1)},l.prototype.getYFormat=function(t){var n=this,r=t&&!n.hasType("gauge")?n.defaultArcValueFormat:n.yFormat,a=t&&!n.hasType("gauge")?n.defaultArcValueFormat:n.y2Format;return function(t,e,i){return("y2"===n.axis.getId(i)?a:r).call(n,t,e)}},l.prototype.yFormat=function(t){var e=this.config;return(e.axis_y_tick_format?e.axis_y_tick_format:this.defaultValueFormat)(t)},l.prototype.y2Format=function(t){var e=this.config;return(e.axis_y2_tick_format?e.axis_y2_tick_format:this.defaultValueFormat)(t)},l.prototype.defaultValueFormat=function(t){return P(t)?+t:""},l.prototype.defaultArcValueFormat=function(t,e){return(100*e).toFixed(1)+"%"},l.prototype.dataLabelFormat=function(t){var e=this.config.data_labels,i=function(t){return P(t)?+t:""};return"function"==typeof e.format?e.format:"object"===s(e.format)?e.format[t]?!0===e.format[t]?i:e.format[t]:function(){return""}:i},l.prototype.initGrid=function(){var t=this,e=t.config,i=t.d3;t.grid=t.main.append("g").attr("clip-path",t.clipPathForGrid).attr("class",Y.grid),e.grid_x_show&&t.grid.append("g").attr("class",Y.xgrids),e.grid_y_show&&t.grid.append("g").attr("class",Y.ygrids),e.grid_focus_show&&t.grid.append("g").attr("class",Y.xgridFocus).append("line").attr("class",Y.xgridFocus),t.xgrid=i.selectAll([]),e.grid_lines_front||t.initGridLines()},l.prototype.initGridLines=function(){var t=this,e=t.d3;t.gridLines=t.main.append("g").attr("clip-path",t.clipPathForGrid).attr("class",Y.grid+" 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o=e.main.select("."+Y.xgrids).selectAll("."+Y.xgrid).data(r),s=o.enter().append("line").attr("class",Y.xgrid).attr("x1",e.xgridAttr.x1).attr("x2",e.xgridAttr.x2).attr("y1",e.xgridAttr.y1).attr("y2",e.xgridAttr.y2).style("opacity",0);e.xgrid=s.merge(o),t||e.xgrid.attr("x1",e.xgridAttr.x1).attr("x2",e.xgridAttr.x2).attr("y1",e.xgridAttr.y1).attr("y2",e.xgridAttr.y2).style("opacity",e.xgridAttr.opacity),o.exit().remove()},l.prototype.updateYGrid=function(){var t=this,e=t.config,i=t.yAxis.tickValues()||t.y.ticks(e.grid_y_ticks),n=t.main.select("."+Y.ygrids).selectAll("."+Y.ygrid).data(i),r=n.enter().append("line").attr("class",Y.ygrid);t.ygrid=r.merge(n),t.ygrid.attr("x1",e.axis_rotated?t.y:0).attr("x2",e.axis_rotated?t.y:t.width).attr("y1",e.axis_rotated?0:t.y).attr("y2",e.axis_rotated?t.height:t.y),n.exit().remove(),t.smoothLines(t.ygrid,"grid")},l.prototype.gridTextAnchor=function(t){return t.position?t.position:"end"},l.prototype.gridTextDx=function(t){return"start"===t.position?4:"middle"===t.position?0:-4},l.prototype.xGridTextX=function(t){return"start"===t.position?-this.height:"middle"===t.position?-this.height/2:0},l.prototype.yGridTextX=function(t){return"start"===t.position?0:"middle"===t.position?this.width/2:this.width},l.prototype.updateGrid=function(t){var e,i,n,r,a=this,o=a.main,s=a.config,c=a.xv.bind(a),d=a.yv.bind(a),l=a.xGridTextX.bind(a),u=a.yGridTextX.bind(a);a.grid.style("visibility",a.hasArcType()?"hidden":"visible"),o.select("line."+Y.xgridFocus).style("visibility","hidden"),s.grid_x_show&&a.updateXGrid(),(i=(e=o.select("."+Y.xgridLines).selectAll("."+Y.xgridLine).data(s.grid_x_lines)).enter().append("g").attr("class",function(t){return Y.xgridLine+(t.class?" 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"+t.class:"")})).append("line").attr("x1",s.axis_rotated?d:0).attr("x2",s.axis_rotated?d:a.width).attr("y1",s.axis_rotated?0:d).attr("y2",s.axis_rotated?a.height:d).style("opacity",0),r.append("text").attr("text-anchor",a.gridTextAnchor).attr("transform",s.axis_rotated?"rotate(-90)":"").attr("x",s.axis_rotated?l:u).attr("y",d).attr("dx",a.gridTextDx).attr("dy",-5).style("opacity",0),a.ygridLines=r.merge(n),a.ygridLines.select("line").transition().duration(t).attr("x1",s.axis_rotated?d:0).attr("x2",s.axis_rotated?d:a.width).attr("y1",s.axis_rotated?0:d).attr("y2",s.axis_rotated?a.height:d).style("opacity",1),a.ygridLines.select("text").transition().duration(t).attr("x",s.axis_rotated?a.xGridTextX.bind(a):a.yGridTextX.bind(a)).attr("y",d).text(function(t){return t.text}).style("opacity",1),n.exit().transition().duration(t).style("opacity",0).remove()},l.prototype.redrawGrid=function(t,e){var i=this,n=i.config,r=i.xv.bind(i),a=i.xgridLines.select("line"),o=i.xgridLines.select("text");return[(t?a.transition(e):a).attr("x1",n.axis_rotated?0:r).attr("x2",n.axis_rotated?i.width:r).attr("y1",n.axis_rotated?r:0).attr("y2",n.axis_rotated?r:i.height).style("opacity",1),(t?o.transition(e):o).attr("x",n.axis_rotated?i.yGridTextX.bind(i):i.xGridTextX.bind(i)).attr("y",r).text(function(t){return t.text}).style("opacity",1)]},l.prototype.showXGridFocus=function(t){var e=this,i=e.config,n=t.filter(function(t){return t&&P(t.value)}),r=e.main.selectAll("line."+Y.xgridFocus),a=e.xx.bind(e);i.tooltip_show&&(e.hasType("scatter")||e.hasArcType()||(r.style("visibility","visible").data([n[0]]).attr(i.axis_rotated?"y1":"x1",a).attr(i.axis_rotated?"y2":"x2",a),e.smoothLines(r,"grid")))},l.prototype.hideXGridFocus=function(){this.main.select("line."+Y.xgridFocus).style("visibility","hidden")},l.prototype.updateXgridFocus=function(){var t=this.config;this.main.select("line."+Y.xgridFocus).attr("x1",t.axis_rotated?0:-10).attr("x2",t.axis_rotated?this.width:-10).attr("y1",t.axis_rotated?-10:0).attr("y2",t.axis_rotated?-10:this.height)},l.prototype.generateGridData=function(t,e){var i,n,r,a,o=[],s=this.main.select("."+Y.axisX).selectAll(".tick").size();if("year"===t)for(n=(i=this.getXDomain())[0].getFullYear(),r=i[1].getFullYear(),a=n;a<=r;a++)o.push(new Date(a+"-01-01 00:00:00"));else(o=e.ticks(10)).length>s&&(o=o.filter(function(t){return(""+t).indexOf(".")<0}));return o},l.prototype.getGridFilterToRemove=function(t){return t?function(e){var i=!1;return[].concat(t).forEach(function(t){("value"in t&&e.value===t.value||"class"in t&&e.class===t.class)&&(i=!0)}),i}:function(){return!0}},l.prototype.removeGridLines=function(t,e){var 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r.addName(t)}),r.showTooltip(n,this),o.point_focus_expand_enabled&&(r.unexpandCircles(),n.forEach(function(t){r.expandCircles(t.index,t.id,!1)})),r.expandBars(i.index,i.id,!0),r.showXGridFocus(n),(r.isBarType(i.id)||r.dist(i,e)<o.point_sensitivity)&&(r.svg.select("."+Y.eventRect).style("cursor","pointer"),r.mouseover||(o.data_onmouseover.call(r.api,i),r.mouseover=i))):s())}:null).on("click",o.interaction_enabled?function(){var t,e,i;r.hasArcType(t)||(t=r.filterTargetsToShow(r.data.targets),e=a.mouse(this),(i=r.findClosestFromTargets(t,e))&&(r.isBarType(i.id)||r.dist(i,e)<o.point_sensitivity)&&(r.isScatterType(i)||!o.data_selection_grouped?[i]:r.filterByX(t,i.x)).forEach(function(t){r.main.selectAll("."+Y.shapes+r.getTargetSelectorSuffix(t.id)).selectAll("."+Y.shape+"-"+t.index).each(function(){(o.data_selection_grouped||r.isWithinShape(this,t))&&(r.toggleShape(this,t,t.index),o.data_onclick.call(r.api,t,this))})}))}:null).call(o.interaction_enabled&&o.data_selection_draggable&&r.drag?a.drag().on("drag",function(){r.drag(a.mouse(this))}).on("start",function(){r.dragstart(a.mouse(this))}).on("end",function(){r.dragend()}):function(){})},l.prototype.getMousePosition=function(t){return[this.x(t.x),this.getYScale(t.id)(t.value)]},l.prototype.dispatchEvent=function(t,e){var i="."+Y.eventRect,n=this.main.select(i).node(),r=n.getBoundingClientRect(),a=r.left+(e?e[0]:0),o=r.top+(e?e[1]:0),s=document.createEvent("MouseEvents");s.initMouseEvent(t,!0,!0,window,0,a,o,a,o,!1,!1,!1,!1,0,null),n.dispatchEvent(s)},l.prototype.initLegend=function(){var t=this;if(t.legendItemTextBox={},t.legendHasRendered=!1,t.legend=t.svg.append("g").attr("transform",t.getTranslate("legend")),!t.config.legend_show)return t.legend.style("visibility","hidden"),void(t.hiddenLegendIds=t.mapToIds(t.data.targets));t.updateLegendWithDefaults()},l.prototype.updateLegendWithDefaults=function(){this.updateLegend(this.mapToIds(this.data.targets),{withTransform:!1,withTransitionForTransform:!1,withTransition:!1})},l.prototype.updateSizeForLegend=function(t,e){var i=this,n=i.config,r={top:i.isLegendTop?i.getCurrentPaddingTop()+n.legend_inset_y+5.5:i.currentHeight-t-i.getCurrentPaddingBottom()-n.legend_inset_y,left:i.isLegendLeft?i.getCurrentPaddingLeft()+n.legend_inset_x+.5:i.currentWidth-e-i.getCurrentPaddingRight()-n.legend_inset_x+.5};i.margin3={top:i.isLegendRight?0:i.isLegendInset?r.top:i.currentHeight-t,right:NaN,bottom:0,left:i.isLegendRight?i.currentWidth-e:i.isLegendInset?r.left:0}},l.prototype.transformLegend=function(t){(t?this.legend.transition():this.legend).attr("transform",this.getTranslate("legend"))},l.prototype.updateLegendStep=function(t){this.legendStep=t},l.prototype.updateLegendItemWidth=function(t){this.legendItemWidth=t},l.prototype.updateLegendItemHeight=function(t){this.legendItemHeight=t},l.prototype.getLegendWidth=function(){var t=this;return t.config.legend_show?t.isLegendRight||t.isLegendInset?t.legendItemWidth*(t.legendStep+1):t.currentWidth:0},l.prototype.getLegendHeight=function(){var t=this,e=0;return t.config.legend_show&&(e=t.isLegendRight?t.currentHeight:Math.max(20,t.legendItemHeight)*(t.legendStep+1)),e},l.prototype.opacityForLegend=function(t){return t.classed(Y.legendItemHidden)?null:1},l.prototype.opacityForUnfocusedLegend=function(t){return t.classed(Y.legendItemHidden)?null:.3},l.prototype.toggleFocusLegend=function(e,t){var i=this;e=i.mapToTargetIds(e),i.legend.selectAll("."+Y.legendItem).filter(function(t){return 0<=e.indexOf(t)}).classed(Y.legendItemFocused,t).transition().duration(100).style("opacity",function(){return(t?i.opacityForLegend:i.opacityForUnfocusedLegend).call(i,i.d3.select(this))})},l.prototype.revertLegend=function(){var t=this,e=t.d3;t.legend.selectAll("."+Y.legendItem).classed(Y.legendItemFocused,!1).transition().duration(100).style("opacity",function(){return t.opacityForLegend(e.select(this))})},l.prototype.showLegend=function(t){var e=this,i=e.config;i.legend_show||(i.legend_show=!0,e.legend.style("visibility","visible"),e.legendHasRendered||e.updateLegendWithDefaults()),e.removeHiddenLegendIds(t),e.legend.selectAll(e.selectorLegends(t)).style("visibility","visible").transition().style("opacity",function(){return e.opacityForLegend(e.d3.select(this))})},l.prototype.hideLegend=function(t){var e=this,i=e.config;i.legend_show&&u(t)&&(i.legend_show=!1,e.legend.style("visibility","hidden")),e.addHiddenLegendIds(t),e.legend.selectAll(e.selectorLegends(t)).style("opacity",0).style("visibility","hidden")},l.prototype.clearLegendItemTextBoxCache=function(){this.legendItemTextBox={}},l.prototype.updateLegend=function(f,t,e){var i,n,r,a,o,s,c,d,l,u,h,g,p,_,x,y,m=this,S=m.config,w=4,v=10,b=0,A=0,T=10,P=S.legend_item_tile_width+5,C=0,L={},V={},G={},E=[0],I={},O=0;function R(t,e,i){var n,r,a,o,s=0===i,c=i===f.length-1,d=(a=t,o=e,m.legendItemTextBox[o]||(m.legendItemTextBox[o]=m.getTextRect(a.textContent,Y.legendItem,a)),m.legendItemTextBox[o]),l=d.width+P+(!c||m.isLegendRight||m.isLegendInset?v:0)+S.legend_padding,u=d.height+w,h=m.isLegendRight||m.isLegendInset?u:l,g=m.isLegendRight||m.isLegendInset?m.getLegendHeight():m.getLegendWidth();function 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a(t,e)+9},r=function(t,e){return i(t,e)},s=function(t,e){return a(t,e)-5},c=function(t,e){return i(t,e)-2},d=function(t,e){return i(t,e)-2+S.legend_item_tile_width},l=function(t,e){return a(t,e)+4},(u=m.legend.selectAll("."+Y.legendItem).data(f).enter().append("g").attr("class",function(t){return m.generateClass(Y.legendItem,t)}).style("visibility",function(t){return m.isLegendToShow(t)?"visible":"hidden"}).style("cursor","pointer").on("click",function(t){S.legend_item_onclick?S.legend_item_onclick.call(m,t):m.d3.event.altKey?(m.api.hide(),m.api.show(t)):(m.api.toggle(t),m.isTargetToShow(t)?m.api.focus(t):m.api.revert())}).on("mouseover",function(t){S.legend_item_onmouseover?S.legend_item_onmouseover.call(m,t):(m.d3.select(this).classed(Y.legendItemFocused,!0),!m.transiting&&m.isTargetToShow(t)&&m.api.focus(t))}).on("mouseout",function(t){S.legend_item_onmouseout?S.legend_item_onmouseout.call(m,t):(m.d3.select(this).classed(Y.legendItemFocused,!1),m.api.revert())})).append("text").text(function(t){return D(S.data_names[t])?S.data_names[t]:t}).each(function(t,e){R(this,t,e)}).style("pointer-events","none").attr("x",m.isLegendRight||m.isLegendInset?n:-200).attr("y",m.isLegendRight||m.isLegendInset?-200:o),u.append("rect").attr("class",Y.legendItemEvent).style("fill-opacity",0).attr("x",m.isLegendRight||m.isLegendInset?r:-200).attr("y",m.isLegendRight||m.isLegendInset?-200:s),u.append("line").attr("class",Y.legendItemTile).style("stroke",m.color).style("pointer-events","none").attr("x1",m.isLegendRight||m.isLegendInset?c:-200).attr("y1",m.isLegendRight||m.isLegendInset?-200:l).attr("x2",m.isLegendRight||m.isLegendInset?d:-200).attr("y2",m.isLegendRight||m.isLegendInset?-200:l).attr("stroke-width",S.legend_item_tile_height),y=m.legend.select("."+Y.legendBackground+" rect"),m.isLegendInset&&0<b&&0===y.size()&&(y=m.legend.insert("g","."+Y.legendItem).attr("class",Y.legendBackground).append("rect")),p=m.legend.selectAll("text").data(f).text(function(t){return D(S.data_names[t])?S.data_names[t]:t}).each(function(t,e){R(this,t,e)}),(h?p.transition():p).attr("x",n).attr("y",o),_=m.legend.selectAll("rect."+Y.legendItemEvent).data(f),(h?_.transition():_).attr("width",function(t){return V[t]}).attr("height",function(t){return G[t]}).attr("x",r).attr("y",s),x=m.legend.selectAll("line."+Y.legendItemTile).data(f),(h?x.transition():x).style("stroke",m.levelColor?function(t){return m.levelColor(m.cache[t].values[0].value)}:m.color).attr("x1",c).attr("y1",l).attr("x2",d).attr("y2",l),y&&(h?y.transition():y).attr("height",m.getLegendHeight()-12).attr("width",b*(O+1)+10),m.legend.selectAll("."+Y.legendItem).classed(Y.legendItemHidden,function(t){return!m.isTargetToShow(t)}),m.updateLegendItemWidth(b),m.updateLegendItemHeight(A),m.updateLegendStep(O),m.updateSizes(),m.updateScales(),m.updateSvgSize(),m.transformAll(g,e),m.legendHasRendered=!0},l.prototype.initRegion=function(){this.region=this.main.append("g").attr("clip-path",this.clipPath).attr("class",Y.regions)},l.prototype.updateRegion=function(t){var e=this,i=e.config;e.region.style("visibility",e.hasArcType()?"hidden":"visible");var n=e.main.select("."+Y.regions).selectAll("."+Y.region).data(i.regions),r=n.enter().append("rect").attr("x",e.regionX.bind(e)).attr("y",e.regionY.bind(e)).attr("width",e.regionWidth.bind(e)).attr("height",e.regionHeight.bind(e)).style("fill-opacity",0);e.mainRegion=r.merge(n).attr("class",e.classRegion.bind(e)),n.exit().transition().duration(t).style("opacity",0).remove()},l.prototype.redrawRegion=function(t,e){var i=this,n=i.mainRegion;return[(t?n.transition(e):n).attr("x",i.regionX.bind(i)).attr("y",i.regionY.bind(i)).attr("width",i.regionWidth.bind(i)).attr("height",i.regionHeight.bind(i)).style("fill-opacity",function(t){return P(t.opacity)?t.opacity:.1})]},l.prototype.regionX=function(t){var e=this,i=e.config,n="y"===t.axis?e.y:e.y2;return"y"===t.axis||"y2"===t.axis?i.axis_rotated&&"start"in t?n(t.start):0:i.axis_rotated?0:"start"in t?e.x(e.isTimeSeries()?e.parseDate(t.start):t.start):0},l.prototype.regionY=function(t){var e=this,i=e.config,n="y"===t.axis?e.y:e.y2;return"y"===t.axis||"y2"===t.axis?i.axis_rotated?0:"end"in t?n(t.end):0:i.axis_rotated&&"start"in t?e.x(e.isTimeSeries()?e.parseDate(t.start):t.start):0},l.prototype.regionWidth=function(t){var e,i=this,n=i.config,r=i.regionX(t),a="y"===t.axis?i.y:i.y2;return(e="y"===t.axis||"y2"===t.axis?n.axis_rotated&&"end"in t?a(t.end):i.width:n.axis_rotated?i.width:"end"in t?i.x(i.isTimeSeries()?i.parseDate(t.end):t.end):i.width)<r?0:e-r},l.prototype.regionHeight=function(t){var e,i=this,n=i.config,r=this.regionY(t),a="y"===t.axis?i.y:i.y2;return(e="y"===t.axis||"y2"===t.axis?n.axis_rotated?i.height:"start"in t?a(t.start):i.height:n.axis_rotated&&"end"in t?i.x(i.isTimeSeries()?i.parseDate(t.end):t.end):i.height)<r?0:e-r},l.prototype.isRegionOnX=function(t){return!t.axis||"x"===t.axis},l.prototype.getScale=function(t,e,i){return(i?this.d3.scaleTime():this.d3.scaleLinear()).range([t,e])},l.prototype.getX=function(t,e,i,n){var r,a=this.getScale(t,e,this.isTimeSeries()),o=i?a.domain(i):a;for(r in this.isCategorized()?(n=n||function(){return 0},a=function(t,e){var i=o(t)+n(t);return e?i:Math.ceil(i)}):a=function(t,e){var i=o(t);return e?i:Math.ceil(i)},o)a[r]=o[r];return a.orgDomain=function(){return o.domain()},this.isCategorized()&&(a.domain=function(t){return arguments.length?(o.domain(t),a):[(t=this.orgDomain())[0],t[1]+1]}),a},l.prototype.getY=function(t,e,i){var n=this.getScale(t,e,this.isTimeSeriesY());return i&&n.domain(i),n},l.prototype.getYScale=function(t){return"y2"===this.axis.getId(t)?this.y2:this.y},l.prototype.getSubYScale=function(t){return"y2"===this.axis.getId(t)?this.subY2:this.subY},l.prototype.updateScales=function(){var e=this,t=e.config,i=!e.x;e.xMin=t.axis_rotated?1:0,e.xMax=t.axis_rotated?e.height:e.width,e.yMin=t.axis_rotated?0:e.height,e.yMax=t.axis_rotated?e.width:1,e.subXMin=e.xMin,e.subXMax=e.xMax,e.subYMin=t.axis_rotated?0:e.height2,e.subYMax=t.axis_rotated?e.width2:1,e.x=e.getX(e.xMin,e.xMax,i?void 0:e.x.orgDomain(),function(){return e.xAxis.tickOffset()}),e.y=e.getY(e.yMin,e.yMax,i?t.axis_y_default:e.y.domain()),e.y2=e.getY(e.yMin,e.yMax,i?t.axis_y2_default:e.y2.domain()),e.subX=e.getX(e.xMin,e.xMax,e.orgXDomain,function(t){return t%1?0:e.subXAxis.tickOffset()}),e.subY=e.getY(e.subYMin,e.subYMax,i?t.axis_y_default:e.subY.domain()),e.subY2=e.getY(e.subYMin,e.subYMax,i?t.axis_y2_default:e.subY2.domain()),e.xAxisTickFormat=e.axis.getXAxisTickFormat(),e.xAxisTickValues=e.axis.getXAxisTickValues(),e.yAxisTickValues=e.axis.getYAxisTickValues(),e.y2AxisTickValues=e.axis.getY2AxisTickValues(),e.xAxis=e.axis.getXAxis(e.x,e.xOrient,e.xAxisTickFormat,e.xAxisTickValues,t.axis_x_tick_outer),e.subXAxis=e.axis.getXAxis(e.subX,e.subXOrient,e.xAxisTickFormat,e.xAxisTickValues,t.axis_x_tick_outer),e.yAxis=e.axis.getYAxis(e.y,e.yOrient,t.axis_y_tick_format,e.yAxisTickValues,t.axis_y_tick_outer),e.y2Axis=e.axis.getYAxis(e.y2,e.y2Orient,t.axis_y2_tick_format,e.y2AxisTickValues,t.axis_y2_tick_outer),i||e.brush&&e.brush.updateScale(e.subX),e.updateArc&&e.updateArc()},l.prototype.selectPoint=function(t,e,i){var n=this,r=n.config,a=(r.axis_rotated?n.circleY:n.circleX).bind(n),o=(r.axis_rotated?n.circleX:n.circleY).bind(n),s=n.pointSelectR.bind(n);r.data_onselected.call(n.api,e,t.node()),n.main.select("."+Y.selectedCircles+n.getTargetSelectorSuffix(e.id)).selectAll("."+Y.selectedCircle+"-"+i).data([e]).enter().append("circle").attr("class",function(){return n.generateClass(Y.selectedCircle,i)}).attr("cx",a).attr("cy",o).attr("stroke",function(){return n.color(e)}).attr("r",function(t){return 1.4*n.pointSelectR(t)}).transition().duration(100).attr("r",s)},l.prototype.unselectPoint=function(t,e,i){this.config.data_onunselected.call(this.api,e,t.node()),this.main.select("."+Y.selectedCircles+this.getTargetSelectorSuffix(e.id)).selectAll("."+Y.selectedCircle+"-"+i).transition().duration(100).attr("r",0).remove()},l.prototype.togglePoint=function(t,e,i,n){t?this.selectPoint(e,i,n):this.unselectPoint(e,i,n)},l.prototype.selectPath=function(t,e){var i=this;i.config.data_onselected.call(i,e,t.node()),i.config.interaction_brighten&&t.transition().duration(100).style("fill",function(){return i.d3.rgb(i.color(e)).brighter(.75)})},l.prototype.unselectPath=function(t,e){var i=this;i.config.data_onunselected.call(i,e,t.node()),i.config.interaction_brighten&&t.transition().duration(100).style("fill",function(){return i.color(e)})},l.prototype.togglePath=function(t,e,i,n){t?this.selectPath(e,i,n):this.unselectPath(e,i,n)},l.prototype.getToggle=function(t,e){var i;return"circle"===t.nodeName?i=this.isStepType(e)?function(){}:this.togglePoint:"path"===t.nodeName&&(i=this.togglePath),i},l.prototype.toggleShape=function(t,e,i){var n=this,r=n.d3,a=n.config,o=r.select(t),s=o.classed(Y.SELECTED),c=n.getToggle(t,e).bind(n);a.data_selection_enabled&&a.data_selection_isselectable(e)&&(a.data_selection_multiple||n.main.selectAll("."+Y.shapes+(a.data_selection_grouped?n.getTargetSelectorSuffix(e.id):"")).selectAll("."+Y.shape).each(function(t,e){var i=r.select(this);i.classed(Y.SELECTED)&&c(!1,i.classed(Y.SELECTED,!1),t,e)}),o.classed(Y.SELECTED,!s),c(!s,o,e,i))},l.prototype.initBar=function(){this.main.select("."+Y.chart).append("g").attr("class",Y.chartBars)},l.prototype.updateTargetsForBar=function(t){var e=this,i=e.config,n=e.classChartBar.bind(e),r=e.classBars.bind(e),a=e.classFocus.bind(e);e.main.select("."+Y.chartBars).selectAll("."+Y.chartBar).data(t).attr("class",function(t){return n(t)+a(t)}).enter().append("g").attr("class",n).style("pointer-events","none").append("g").attr("class",r).style("cursor",function(t){return i.data_selection_isselectable(t)?"pointer":null})},l.prototype.updateBar=function(t){var e=this,i=e.barData.bind(e),n=e.classBar.bind(e),r=e.initialOpacity.bind(e),a=function(t){return e.color(t.id)},o=e.main.selectAll("."+Y.bars).selectAll("."+Y.bar).data(i),s=o.enter().append("path").attr("class",n).style("stroke",a).style("fill",a);e.mainBar=s.merge(o).style("opacity",r),o.exit().transition().duration(t).style("opacity",0)},l.prototype.redrawBar=function(t,e,i){return[(e?this.mainBar.transition(i):this.mainBar).attr("d",t).style("stroke",this.color).style("fill",this.color).style("opacity",1)]},l.prototype.getBarW=function(t,e){var i=this.config,n="number"==typeof i.bar_width?i.bar_width:e?t.tickInterval()*i.bar_width_ratio/e:0;return i.bar_width_max&&n>i.bar_width_max?i.bar_width_max:n},l.prototype.getBars=function(t,e){return(e?this.main.selectAll("."+Y.bars+this.getTargetSelectorSuffix(e)):this.main).selectAll("."+Y.bar+(P(t)?"-"+t:""))},l.prototype.expandBars=function(t,e,i){i&&this.unexpandBars(),this.getBars(t,e).classed(Y.EXPANDED,!0)},l.prototype.unexpandBars=function(t){this.getBars(t).classed(Y.EXPANDED,!1)},l.prototype.generateDrawBar=function(t,e){var a=this.config,o=this.generateGetBarPoints(t,e);return function(t,e){var i=o(t,e),n=a.axis_rotated?1:0,r=a.axis_rotated?0:1;return"M "+i[0][n]+","+i[0][r]+" L"+i[1][n]+","+i[1][r]+" L"+i[2][n]+","+i[2][r]+" L"+i[3][n]+","+i[3][r]+" z"}},l.prototype.generateGetBarPoints=function(t,e){var o=this,i=e?o.subXAxis:o.xAxis,n=t.__max__+1,s=o.getBarW(i,n),c=o.getShapeX(s,n,t,!!e),d=o.getShapeY(!!e),l=o.getShapeOffset(o.isBarType,t,!!e),u=s*(o.config.bar_space/2),h=e?o.getSubYScale:o.getYScale;return function(t,e){var i=h.call(o,t.id)(0),n=l(t,e)||i,r=c(t),a=d(t);return o.config.axis_rotated&&(0<t.value&&a<i||t.value<0&&i<a)&&(a=i),[[r+u,n],[r+u,a-(i-n)],[r+s-u,a-(i-n)],[r+s-u,n]]}},l.prototype.isWithinBar=function(t,e){var i=e.getBoundingClientRect(),n=e.pathSegList.getItem(0),r=e.pathSegList.getItem(1),a=Math.min(n.x,r.x),o=Math.min(n.y,r.y),s=a+i.width+2,c=o+i.height+2,d=o-2;return a-2<t[0]&&t[0]<s&&d<t[1]&&t[1]<c},l.prototype.getShapeIndices=function(t){var e,i,n=this.config,r={},a=0;return this.filterTargetsToShow(this.data.targets.filter(t,this)).forEach(function(t){for(e=0;e<n.data_groups.length;e++)if(!(n.data_groups[e].indexOf(t.id)<0))for(i=0;i<n.data_groups[e].length;i++)if(n.data_groups[e][i]in r){r[t.id]=r[n.data_groups[e][i]];break}v(r[t.id])&&(r[t.id]=a++)}),r.__max__=a-1,r},l.prototype.getShapeX=function(i,n,r,t){var a=t?this.subX:this.x;return function(t){var e=t.id in r?r[t.id]:0;return t.x||0===t.x?a(t.x)-i*(n/2-e):0}},l.prototype.getShapeY=function(e){var i=this;return function(t){return(e?i.getSubYScale(t.id):i.getYScale(t.id))(t.value)}},l.prototype.getShapeOffset=function(t,s,e){var c=this,d=c.orderTargets(c.filterTargetsToShow(c.data.targets.filter(t,c))),l=d.map(function(t){return t.id});return function(i,n){var r=e?c.getSubYScale(i.id):c.getYScale(i.id),a=r(0),o=a;return d.forEach(function(t){var e=c.isStepType(i)?c.convertValuesToStep(t.values):t.values;t.id!==i.id&&s[t.id]===s[i.id]&&l.indexOf(t.id)<l.indexOf(i.id)&&(void 0!==e[n]&&+e[n].x==+i.x||(n=-1,e.forEach(function(t,e){t.x===i.x&&(n=e)})),n in e&&0<=e[n].value*i.value&&(o+=r(e[n].value)-a))}),o}},l.prototype.isWithinShape=function(t,e){var i,n=this,r=n.d3.select(t);return n.isTargetToShow(e.id)?"circle"===t.nodeName?i=n.isStepType(e)?n.isWithinStep(t,n.getYScale(e.id)(e.value)):n.isWithinCircle(t,1.5*n.pointSelectR(e)):"path"===t.nodeName&&(i=!r.classed(Y.bar)||n.isWithinBar(n.d3.mouse(t),t)):i=!1,i},l.prototype.getInterpolate=function(t){var e=this,i=e.d3,n={linear:i.curveLinear,"linear-closed":i.curveLinearClosed,basis:i.curveBasis,"basis-open":i.curveBasisOpen,"basis-closed":i.curveBasisClosed,bundle:i.curveBundle,cardinal:i.curveCardinal,"cardinal-open":i.curveCardinalOpen,"cardinal-closed":i.curveCardinalClosed,monotone:i.curveMonotoneX,step:i.curveStep,"step-before":i.curveStepBefore,"step-after":i.curveStepAfter};return e.isSplineType(t)?n[e.config.spline_interpolation_type]||n.cardinal:e.isStepType(t)?n[e.config.line_step_type]:n.linear},l.prototype.initLine=function(){this.main.select("."+Y.chart).append("g").attr("class",Y.chartLines)},l.prototype.updateTargetsForLine=function(t){var e,i=this,n=i.config,r=i.classChartLine.bind(i),a=i.classLines.bind(i),o=i.classAreas.bind(i),s=i.classCircles.bind(i),c=i.classFocus.bind(i);(e=i.main.select("."+Y.chartLines).selectAll("."+Y.chartLine).data(t).attr("class",function(t){return r(t)+c(t)}).enter().append("g").attr("class",r).style("opacity",0).style("pointer-events","none")).append("g").attr("class",a),e.append("g").attr("class",o),e.append("g").attr("class",function(t){return i.generateClass(Y.selectedCircles,t.id)}),e.append("g").attr("class",s).style("cursor",function(t){return n.data_selection_isselectable(t)?"pointer":null}),t.forEach(function(e){i.main.selectAll("."+Y.selectedCircles+i.getTargetSelectorSuffix(e.id)).selectAll("."+Y.selectedCircle).each(function(t){t.value=e.values[t.index].value})})},l.prototype.updateLine=function(t){var e=this,i=e.main.selectAll("."+Y.lines).selectAll("."+Y.line).data(e.lineData.bind(e)),n=i.enter().append("path").attr("class",e.classLine.bind(e)).style("stroke",e.color);e.mainLine=n.merge(i).style("opacity",e.initialOpacity.bind(e)).style("shape-rendering",function(t){return e.isStepType(t)?"crispEdges":""}).attr("transform",null),i.exit().transition().duration(t).style("opacity",0)},l.prototype.redrawLine=function(t,e,i){return[(e?this.mainLine.transition(i):this.mainLine).attr("d",t).style("stroke",this.color).style("opacity",1)]},l.prototype.generateDrawLine=function(t,s){var c=this,d=c.config,l=c.d3.line(),i=c.generateGetLinePoints(t,s),u=s?c.getSubYScale:c.getYScale,e=function(t){return(s?c.subxx:c.xx).call(c,t)},n=function(t,e){return 0<d.data_groups.length?i(t,e)[0][1]:u.call(c,t.id)(t.value)};return l=d.axis_rotated?l.x(n).y(e):l.x(e).y(n),d.line_connectNull||(l=l.defined(function(t){return null!=t.value})),function(t){var e,i=d.line_connectNull?c.filterRemoveNull(t.values):t.values,n=s?c.subX:c.x,r=u.call(c,t.id),a=0,o=0;return c.isLineType(t)?d.data_regions[t.id]?e=c.lineWithRegions(i,n,r,d.data_regions[t.id]):(c.isStepType(t)&&(i=c.convertValuesToStep(i)),e=l.curve(c.getInterpolate(t))(i)):(i[0]&&(a=n(i[0].x),o=r(i[0].value)),e=d.axis_rotated?"M "+o+" "+a:"M "+a+" "+o),e||"M 0 0"}},l.prototype.generateGetLinePoints=function(t,e){var o=this,s=o.config,i=t.__max__+1,c=o.getShapeX(0,i,t,!!e),d=o.getShapeY(!!e),l=o.getShapeOffset(o.isLineType,t,!!e),u=e?o.getSubYScale:o.getYScale;return function(t,e){var i=u.call(o,t.id)(0),n=l(t,e)||i,r=c(t),a=d(t);return s.axis_rotated&&(0<t.value&&a<i||t.value<0&&i<a)&&(a=i),[[r,a-(i-n)],[r,a-(i-n)],[r,a-(i-n)],[r,a-(i-n)]]}},l.prototype.lineWithRegions=function(t,c,d,e){var i,n,r,a,l,o,s,u,h,g,p,f=this,_=f.config,x="M",y=f.isCategorized()?.5:0,m=[];function S(t,e){var i;for(i=0;i<e.length;i++)if(e[i].start<t&&t<=e[i].end)return!0;return!1}if(D(e))for(i=0;i<e.length;i++)m[i]={},v(e[i].start)?m[i].start=t[0].x:m[i].start=f.isTimeSeries()?f.parseDate(e[i].start):e[i].start,v(e[i].end)?m[i].end=t[t.length-1].x:m[i].end=f.isTimeSeries()?f.parseDate(e[i].end):e[i].end;function w(t){return"M"+t[0][0]+" "+t[0][1]+" "+t[1][0]+" "+t[1][1]}for(g=_.axis_rotated?function(t){return d(t.value)}:function(t){return c(t.x)},p=_.axis_rotated?function(t){return c(t.x)}:function(t){return d(t.value)},r=f.isTimeSeries()?function(t,e,i,n){var r=t.x.getTime(),a=e.x-t.x,o=new Date(r+a*i),s=new Date(r+a*(i+n));return w(_.axis_rotated?[[d(l(i)),c(o)],[d(l(i+n)),c(s)]]:[[c(o),d(l(i))],[c(s),d(l(i+n))]])}:function(t,e,i,n){return w(_.axis_rotated?[[d(l(i),!0),c(a(i))],[d(l(i+n),!0),c(a(i+n))]]:[[c(a(i),!0),d(l(i))],[c(a(i+n),!0),d(l(i+n))]])},i=0;i<t.length;i++){if(v(m)||!S(t[i].x,m))x+=" "+g(t[i])+" "+p(t[i]);else for(a=f.getScale(t[i-1].x+y,t[i].x+y,f.isTimeSeries()),l=f.getScale(t[i-1].value,t[i].value),o=c(t[i].x)-c(t[i-1].x),s=d(t[i].value)-d(t[i-1].value),h=2*(u=2/Math.sqrt(Math.pow(o,2)+Math.pow(s,2))),n=u;n<=1;n+=h)x+=r(t[i-1],t[i],n,u);t[i].x}return x},l.prototype.updateArea=function(t){var e=this,i=e.d3,n=e.main.selectAll("."+Y.areas).selectAll("."+Y.area).data(e.lineData.bind(e)),r=n.enter().append("path").attr("class",e.classArea.bind(e)).style("fill",e.color).style("opacity",function(){return e.orgAreaOpacity=+i.select(this).style("opacity"),0});e.mainArea=r.merge(n).style("opacity",e.orgAreaOpacity),n.exit().transition().duration(t).style("opacity",0)},l.prototype.redrawArea=function(t,e,i){return[(e?this.mainArea.transition(i):this.mainArea).attr("d",t).style("fill",this.color).style("opacity",this.orgAreaOpacity)]},l.prototype.generateDrawArea=function(t,e){var a=this,o=a.config,s=a.d3.area(),i=a.generateGetAreaPoints(t,e),n=e?a.getSubYScale:a.getYScale,r=function(t){return(e?a.subxx:a.xx).call(a,t)},c=function(t,e){return 0<o.data_groups.length?i(t,e)[0][1]:n.call(a,t.id)(a.getAreaBaseValue(t.id))},d=function(t,e){return 0<o.data_groups.length?i(t,e)[1][1]:n.call(a,t.id)(t.value)};return s=o.axis_rotated?s.x0(c).x1(d).y(r):s.x(r).y0(o.area_above?0:c).y1(d),o.line_connectNull||(s=s.defined(function(t){return null!==t.value})),function(t){var e,i=o.line_connectNull?a.filterRemoveNull(t.values):t.values,n=0,r=0;return a.isAreaType(t)?(a.isStepType(t)&&(i=a.convertValuesToStep(i)),e=s.curve(a.getInterpolate(t))(i)):(i[0]&&(n=a.x(i[0].x),r=a.getYScale(t.id)(i[0].value)),e=o.axis_rotated?"M "+r+" "+n:"M "+n+" "+r),e||"M 0 0"}},l.prototype.getAreaBaseValue=function(){return 0},l.prototype.generateGetAreaPoints=function(t,e){var o=this,s=o.config,i=t.__max__+1,c=o.getShapeX(0,i,t,!!e),d=o.getShapeY(!!e),l=o.getShapeOffset(o.isAreaType,t,!!e),u=e?o.getSubYScale:o.getYScale;return function(t,e){var i=u.call(o,t.id)(0),n=l(t,e)||i,r=c(t),a=d(t);return s.axis_rotated&&(0<t.value&&a<i||t.value<0&&i<a)&&(a=i),[[r,n],[r,a-(i-n)],[r,a-(i-n)],[r,n]]}},l.prototype.updateCircle=function(t,e){var i=this,n=i.main.selectAll("."+Y.circles).selectAll("."+Y.circle).data(i.lineOrScatterData.bind(i)),r=n.enter().append("circle").attr("class",i.classCircle.bind(i)).attr("cx",t).attr("cy",e).attr("r",i.pointR.bind(i)).style("fill",i.color);i.mainCircle=r.merge(n).style("opacity",i.initialOpacityForCircle.bind(i)),n.exit().style("opacity",0)},l.prototype.redrawCircle=function(t,e,i,n){var r=this,a=r.main.selectAll("."+Y.selectedCircle);return[(i?r.mainCircle.transition(n):r.mainCircle).style("opacity",this.opacityForCircle.bind(r)).style("fill",r.color).attr("cx",t).attr("cy",e),(i?a.transition(n):a).attr("cx",t).attr("cy",e)]},l.prototype.circleX=function(t){return t.x||0===t.x?this.x(t.x):null},l.prototype.updateCircleY=function(){var t,i,e=this;0<e.config.data_groups.length?(t=e.getShapeIndices(e.isLineType),i=e.generateGetLinePoints(t),e.circleY=function(t,e){return i(t,e)[0][1]}):e.circleY=function(t){return e.getYScale(t.id)(t.value)}},l.prototype.getCircles=function(t,e){return(e?this.main.selectAll("."+Y.circles+this.getTargetSelectorSuffix(e)):this.main).selectAll("."+Y.circle+(P(t)?"-"+t:""))},l.prototype.expandCircles=function(t,e,i){var n=this.pointExpandedR.bind(this);i&&this.unexpandCircles(),this.getCircles(t,e).classed(Y.EXPANDED,!0).attr("r",n)},l.prototype.unexpandCircles=function(t){var e=this,i=e.pointR.bind(e);e.getCircles(t).filter(function(){return e.d3.select(this).classed(Y.EXPANDED)}).classed(Y.EXPANDED,!1).attr("r",i)},l.prototype.pointR=function(t){var e=this.config;return this.isStepType(t)?0:h(e.point_r)?e.point_r(t):e.point_r},l.prototype.pointExpandedR=function(t){var e=this.config;return e.point_focus_expand_enabled?h(e.point_focus_expand_r)?e.point_focus_expand_r(t):e.point_focus_expand_r?e.point_focus_expand_r:1.75*this.pointR(t):this.pointR(t)},l.prototype.pointSelectR=function(t){var e=this.config;return h(e.point_select_r)?e.point_select_r(t):e.point_select_r?e.point_select_r:4*this.pointR(t)},l.prototype.isWithinCircle=function(t,e){var i=this.d3,n=i.mouse(t),r=i.select(t),a=+r.attr("cx"),o=+r.attr("cy");return Math.sqrt(Math.pow(a-n[0],2)+Math.pow(o-n[1],2))<e},l.prototype.isWithinStep=function(t,e){return Math.abs(e-this.d3.mouse(t)[1])<30},l.prototype.getCurrentWidth=function(){var t=this.config;return t.size_width?t.size_width:this.getParentWidth()},l.prototype.getCurrentHeight=function(){var t=this.config,e=t.size_height?t.size_height:this.getParentHeight();return 0<e?e:320/(this.hasType("gauge")&&!t.gauge_fullCircle?2:1)},l.prototype.getCurrentPaddingTop=function(){var t=this.config,e=P(t.padding_top)?t.padding_top:0;return this.title&&this.title.node()&&(e+=this.getTitlePadding()),e},l.prototype.getCurrentPaddingBottom=function(){var t=this.config;return P(t.padding_bottom)?t.padding_bottom:0},l.prototype.getCurrentPaddingLeft=function(t){var e=this.config;return P(e.padding_left)?e.padding_left:e.axis_rotated?!e.axis_x_show||e.axis_x_inner?1:Math.max(r(this.getAxisWidthByAxisId("x",t)),40):!e.axis_y_show||e.axis_y_inner?this.axis.getYAxisLabelPosition().isOuter?30:1:r(this.getAxisWidthByAxisId("y",t))},l.prototype.getCurrentPaddingRight=function(){var t=this,e=t.config,i=t.isLegendRight?t.getLegendWidth()+20:0;return P(e.padding_right)?e.padding_right+1:e.axis_rotated?10+i:!e.axis_y2_show||e.axis_y2_inner?2+i+(t.axis.getY2AxisLabelPosition().isOuter?20:0):r(t.getAxisWidthByAxisId("y2"))+i},l.prototype.getParentRectValue=function(e){for(var i,n=this.selectChart.node();n&&"BODY"!==n.tagName;){try{i=n.getBoundingClientRect()[e]}catch(t){"width"===e&&(i=n.offsetWidth)}if(i)break;n=n.parentNode}return i},l.prototype.getParentWidth=function(){return this.getParentRectValue("width")},l.prototype.getParentHeight=function(){var t=this.selectChart.style("height");return 0<t.indexOf("px")?+t.replace("px",""):0},l.prototype.getSvgLeft=function(t){var e=this,i=e.config,n=i.axis_rotated||!i.axis_rotated&&!i.axis_y_inner,r=i.axis_rotated?Y.axisX:Y.axisY,a=e.main.select("."+r).node(),o=a&&n?a.getBoundingClientRect():{right:0},s=e.selectChart.node().getBoundingClientRect(),c=e.hasArcType(),d=o.right-s.left-(c?0:e.getCurrentPaddingLeft(t));return 0<d?d:0},l.prototype.getAxisWidthByAxisId=function(t,e){var i=this.axis.getLabelPositionById(t);return this.axis.getMaxTickWidth(t,e)+(i.isInner?20:40)},l.prototype.getHorizontalAxisHeight=function(t){var e=this,i=e.config,n=30;return"x"!==t||i.axis_x_show?"x"===t&&i.axis_x_height?i.axis_x_height:"y"!==t||i.axis_y_show?"y2"!==t||i.axis_y2_show?("x"===t&&!i.axis_rotated&&i.axis_x_tick_rotate&&(n=30+e.axis.getMaxTickWidth(t)*Math.cos(Math.PI*(90-Math.abs(i.axis_x_tick_rotate))/180)),"y"===t&&i.axis_rotated&&i.axis_y_tick_rotate&&(n=30+e.axis.getMaxTickWidth(t)*Math.cos(Math.PI*(90-Math.abs(i.axis_y_tick_rotate))/180)),n+(e.axis.getLabelPositionById(t).isInner?0:10)+("y2"===t?-10:0)):e.rotated_padding_top:!i.legend_show||e.isLegendRight||e.isLegendInset?1:10:8},l.prototype.initBrush=function(t){var r=this,e=r.d3;return r.brush=(r.config.axis_rotated?e.brushY():e.brushX()).on("brush",function(){var t=e.event.sourceEvent;t&&"zoom"===t.type||r.redrawForBrush()}).on("end",function(){var t=e.event.sourceEvent;t&&"zoom"===t.type||r.brush.empty()&&t&&"end"!==t.type&&r.brush.clear()}),r.brush.updateExtent=function(){var t,e=this.scale.range();return t=r.config.axis_rotated?[[0,e[0]],[r.width2,e[1]]]:[[e[0],0],[e[1],r.height2]],this.extent(t),this},r.brush.updateScale=function(t){return this.scale=t,this},r.brush.update=function(t){this.updateScale(t||r.subX).updateExtent(),r.context.select("."+Y.brush).call(this)},r.brush.clear=function(){r.context.select("."+Y.brush).call(r.brush.move,null)},r.brush.selection=function(){return e.brushSelection(r.context.select("."+Y.brush).node())},r.brush.selectionAsValue=function(t,e){var i,n;return t?(r.context&&(i=[this.scale(t[0]),this.scale(t[1])],n=r.context.select("."+Y.brush),e&&(n=n.transition()),r.brush.move(n,i)),[]):(i=r.brush.selection()||[0,0],[this.scale.invert(i[0]),this.scale.invert(i[1])])},r.brush.empty=function(){var t=r.brush.selection();return!t||t[0]===t[1]},r.brush.updateScale(t)},l.prototype.initSubchart=function(){var t=this,e=t.config,i=t.context=t.svg.append("g").attr("transform",t.getTranslate("context")),n=e.subchart_show?"visible":"hidden";i.style("visibility",n),i.append("g").attr("clip-path",t.clipPathForSubchart).attr("class",Y.chart),i.select("."+Y.chart).append("g").attr("class",Y.chartBars),i.select("."+Y.chart).append("g").attr("class",Y.chartLines),i.append("g").attr("clip-path",t.clipPath).attr("class",Y.brush),t.axes.subx=i.append("g").attr("class",Y.axisX).attr("transform",t.getTranslate("subx")).attr("clip-path",e.axis_rotated?"":t.clipPathForXAxis)},l.prototype.initSubchartBrush=function(){this.initBrush(this.subX).updateExtent(),this.context.select("."+Y.brush).call(this.brush)},l.prototype.updateTargetsForSubchart=function(t){var e,i,n,r,a=this,o=a.context,s=a.config,c=a.classChartBar.bind(a),d=a.classBars.bind(a),l=a.classChartLine.bind(a),u=a.classLines.bind(a),h=a.classAreas.bind(a);s.subchart_show&&((n=(r=o.select("."+Y.chartBars).selectAll("."+Y.chartBar).data(t)).enter().append("g").style("opacity",0)).merge(r).attr("class",c),n.append("g").attr("class",d),(e=(i=o.select("."+Y.chartLines).selectAll("."+Y.chartLine).data(t)).enter().append("g").style("opacity",0)).merge(i).attr("class",l),e.append("g").attr("class",u),e.append("g").attr("class",h),o.selectAll("."+Y.brush+" rect").attr(s.axis_rotated?"width":"height",s.axis_rotated?a.width2:a.height2))},l.prototype.updateBarForSubchart=function(t){var e=this,i=e.context.selectAll("."+Y.bars).selectAll("."+Y.bar).data(e.barData.bind(e)),n=i.enter().append("path").attr("class",e.classBar.bind(e)).style("stroke","none").style("fill",e.color);i.exit().transition().duration(t).style("opacity",0).remove(),e.contextBar=n.merge(i).style("opacity",e.initialOpacity.bind(e))},l.prototype.redrawBarForSubchart=function(t,e,i){(e?this.contextBar.transition(Math.random().toString()).duration(i):this.contextBar).attr("d",t).style("opacity",1)},l.prototype.updateLineForSubchart=function(t){var e=this,i=e.context.selectAll("."+Y.lines).selectAll("."+Y.line).data(e.lineData.bind(e)),n=i.enter().append("path").attr("class",e.classLine.bind(e)).style("stroke",e.color);i.exit().transition().duration(t).style("opacity",0).remove(),e.contextLine=n.merge(i).style("opacity",e.initialOpacity.bind(e))},l.prototype.redrawLineForSubchart=function(t,e,i){(e?this.contextLine.transition(Math.random().toString()).duration(i):this.contextLine).attr("d",t).style("opacity",1)},l.prototype.updateAreaForSubchart=function(t){var e=this,i=e.d3,n=e.context.selectAll("."+Y.areas).selectAll("."+Y.area).data(e.lineData.bind(e)),r=n.enter().append("path").attr("class",e.classArea.bind(e)).style("fill",e.color).style("opacity",function(){return e.orgAreaOpacity=+i.select(this).style("opacity"),0});n.exit().transition().duration(t).style("opacity",0).remove(),e.contextArea=r.merge(n).style("opacity",0)},l.prototype.redrawAreaForSubchart=function(t,e,i){(e?this.contextArea.transition(Math.random().toString()).duration(i):this.contextArea).attr("d",t).style("fill",this.color).style("opacity",this.orgAreaOpacity)},l.prototype.redrawSubchart=function(t,e,i,n,r,a,o){var s,c,d,l=this,u=l.d3,h=l.config;l.context.style("visibility",h.subchart_show?"visible":"hidden"),h.subchart_show&&(u.event&&"zoom"===u.event.type&&l.brush.selectionAsValue(l.x.orgDomain()),t&&(l.brush.empty()||l.brush.selectionAsValue(l.x.orgDomain()),s=l.generateDrawArea(r,!0),c=l.generateDrawBar(a,!0),d=l.generateDrawLine(o,!0),l.updateBarForSubchart(i),l.updateLineForSubchart(i),l.updateAreaForSubchart(i),l.redrawBarForSubchart(c,i,i),l.redrawLineForSubchart(d,i,i),l.redrawAreaForSubchart(s,i,i)))},l.prototype.redrawForBrush=function(){var t,e=this,i=e.x,n=e.d3;e.redraw({withTransition:!1,withY:e.config.zoom_rescale,withSubchart:!1,withUpdateXDomain:!0,withEventRect:!1,withDimension:!1}),t=n.event.selection||e.brush.scale.range(),e.main.select("."+Y.eventRect).call(e.zoom.transform,n.zoomIdentity.scale(e.width/(t[1]-t[0])).translate(-t[0],0)),e.config.subchart_onbrush.call(e.api,i.orgDomain())},l.prototype.transformContext=function(t,e){var i;e&&e.axisSubX?i=e.axisSubX:(i=this.context.select("."+Y.axisX),t&&(i=i.transition())),this.context.attr("transform",this.getTranslate("context")),i.attr("transform",this.getTranslate("subx"))},l.prototype.getDefaultSelection=function(){var t=this,e=t.config,i=h(e.axis_x_selection)?e.axis_x_selection(t.getXDomain(t.data.targets)):e.axis_x_selection;return t.isTimeSeries()&&(i=[t.parseDate(i[0]),t.parseDate(i[1])]),i},l.prototype.initText=function(){this.main.select("."+Y.chart).append("g").attr("class",Y.chartTexts),this.mainText=this.d3.selectAll([])},l.prototype.updateTargetsForText=function(t){var e=this,i=e.classChartText.bind(e),n=e.classTexts.bind(e),r=e.classFocus.bind(e),a=e.main.select("."+Y.chartTexts).selectAll("."+Y.chartText).data(t),o=a.enter().append("g").attr("class",i).style("opacity",0).style("pointer-events","none");o.append("g").attr("class",n),o.merge(a).attr("class",function(t){return i(t)+r(t)})},l.prototype.updateText=function(t,e,i){var n=this,r=n.config,a=n.barOrLineData.bind(n),o=n.classText.bind(n),s=n.main.selectAll("."+Y.texts).selectAll("."+Y.text).data(a),c=s.enter().append("text").attr("class",o).attr("text-anchor",function(t){return r.axis_rotated?t.value<0?"end":"start":"middle"}).style("stroke","none").attr("x",t).attr("y",e).style("fill",function(t){return n.color(t)}).style("fill-opacity",0);n.mainText=c.merge(s).text(function(t,e,i){return n.dataLabelFormat(t.id)(t.value,t.id,e,i)}),s.exit().transition().duration(i).style("fill-opacity",0).remove()},l.prototype.redrawText=function(t,e,i,n,r){return[(n?this.mainText.transition(r):this.mainText).attr("x",t).attr("y",e).style("fill",this.color).style("fill-opacity",i?0:this.opacityForText.bind(this))]},l.prototype.getTextRect=function(t,e,i){var n,r=this.d3.select("body").append("div").classed("c3",!0),a=r.append("svg").style("visibility","hidden").style("position","fixed").style("top",0).style("left",0),o=this.d3.select(i).style("font");return a.selectAll(".dummy").data([t]).enter().append("text").classed(e||"",!0).style("font",o).text(t).each(function(){n=this.getBoundingClientRect()}),r.remove(),n},l.prototype.generateXYForText=function(t,e,i,n){var r=this,a=r.generateGetAreaPoints(t,!1),o=r.generateGetBarPoints(e,!1),s=r.generateGetLinePoints(i,!1),c=n?r.getXForText:r.getYForText;return function(t,e){var i=r.isAreaType(t)?a:r.isBarType(t)?o:s;return c.call(r,i(t,e),t,this)}},l.prototype.getXForText=function(t,e,i){var n,r,a=this,o=i.getBoundingClientRect();return a.config.axis_rotated?(r=a.isBarType(e)?4:6,n=t[2][1]+r*(e.value<0?-1:1)):n=a.hasType("bar")?(t[2][0]+t[0][0])/2:t[0][0],null===e.value&&(n>a.width?n=a.width-o.width:n<0&&(n=4)),n},l.prototype.getYForText=function(t,e,i){var n,r=this,a=i.getBoundingClientRect();return r.config.axis_rotated?n=(t[0][0]+t[2][0]+.6*a.height)/2:(n=t[2][1],e.value<0||0===e.value&&!r.hasPositiveValue?(n+=a.height,r.isBarType(e)&&r.isSafari()?n-=3:!r.isBarType(e)&&r.isChrome()&&(n+=3)):n+=r.isBarType(e)?-3:-6),null!==e.value||r.config.axis_rotated||(n<a.height?n=a.height:n>this.height&&(n=this.height-4)),n},l.prototype.initTitle=function(){this.title=this.svg.append("text").text(this.config.title_text).attr("class",this.CLASS.title)},l.prototype.redrawTitle=function(){var t=this;t.title.attr("x",t.xForTitle.bind(t)).attr("y",t.yForTitle.bind(t))},l.prototype.xForTitle=function(){var t=this,e=t.config,i=e.title_position||"left";return 0<=i.indexOf("right")?t.currentWidth-t.getTextRect(t.title.node().textContent,t.CLASS.title,t.title.node()).width-e.title_padding.right:0<=i.indexOf("center")?(t.currentWidth-t.getTextRect(t.title.node().textContent,t.CLASS.title,t.title.node()).width)/2:e.title_padding.left},l.prototype.yForTitle=function(){var t=this;return t.config.title_padding.top+t.getTextRect(t.title.node().textContent,t.CLASS.title,t.title.node()).height},l.prototype.getTitlePadding=function(){return this.yForTitle()+this.config.title_padding.bottom},l.prototype.initTooltip=function(){var t,e=this,i=e.config;if(e.tooltip=e.selectChart.style("position","relative").append("div").attr("class",Y.tooltipContainer).style("position","absolute").style("pointer-events","none").style("display","none"),i.tooltip_init_show){if(e.isTimeSeries()&&c(i.tooltip_init_x)){for(i.tooltip_init_x=e.parseDate(i.tooltip_init_x),t=0;t<e.data.targets[0].values.length&&e.data.targets[0].values[t].x-i.tooltip_init_x!=0;t++);i.tooltip_init_x=t}e.tooltip.html(i.tooltip_contents.call(e,e.data.targets.map(function(t){return e.addName(t.values[i.tooltip_init_x])}),e.axis.getXAxisTickFormat(),e.getYFormat(e.hasArcType()),e.color)),e.tooltip.style("top",i.tooltip_init_position.top).style("left",i.tooltip_init_position.left).style("display","block")}},l.prototype.getTooltipSortFunction=function(){var t=this,e=t.config;if(0!==e.data_groups.length&&void 0===e.tooltip_order){var i=t.orderTargets(t.data.targets).map(function(t){return t.id});return(t.isOrderAsc()||t.isOrderDesc())&&(i=i.reverse()),function(t,e){return i.indexOf(t.id)-i.indexOf(e.id)}}var n=e.tooltip_order;void 0===n&&(n=e.data_order);var r=function(t){return t?t.value:null};if(c(n)&&"asc"===n.toLowerCase())return function(t,e){return r(t)-r(e)};if(c(n)&&"desc"===n.toLowerCase())return function(t,e){return r(e)-r(t)};if(h(n)){var a=n;return void 0===e.tooltip_order&&(a=function(t,e){return n(t?{id:t.id,values:[t]}:null,e?{id:e.id,values:[e]}:null)}),a}return o(n)?function(t,e){return n.indexOf(t.id)-n.indexOf(e.id)}:void 0},l.prototype.getTooltipContent=function(t,e,i,n){var r,a,o,s,c,d,l=this,u=l.config,h=u.tooltip_format_title||e,g=u.tooltip_format_name||function(t){return t},p=u.tooltip_format_value||i,f=this.getTooltipSortFunction();for(f&&t.sort(f),a=0;a<t.length;a++)if(t[a]&&(t[a].value||0===t[a].value)&&(r||(o=_(h?h(t[a].x):t[a].x),r="<table class='"+l.CLASS.tooltip+"'>"+(o||0===o?"<tr><th colspan='2'>"+o+"</th></tr>":"")),void 0!==(s=_(p(t[a].value,t[a].ratio,t[a].id,t[a].index,t))))){if(null===t[a].name)continue;c=_(g(t[a].name,t[a].ratio,t[a].id,t[a].index)),d=l.levelColor?l.levelColor(t[a].value):n(t[a].id),r+="<tr class='"+l.CLASS.tooltipName+"-"+l.getTargetSelectorSuffix(t[a].id)+"'>",r+="<td class='name'><span style='background-color:"+d+"'></span>"+c+"</td>",r+="<td class='value'>"+s+"</td>",r+="</tr>"}return r+"</table>"},l.prototype.tooltipPosition=function(t,e,i,n){var r,a,o,s,c,d=this,l=d.config,u=d.d3,h=d.hasArcType(),g=u.mouse(n);return h?(a=(d.width-(d.isLegendRight?d.getLegendWidth():0))/2+g[0],s=(d.hasType("gauge")?d.height:d.height/2)+g[1]+20):(r=d.getSvgLeft(!0),l.axis_rotated?(o=(a=r+g[0]+100)+e,c=d.currentWidth-d.getCurrentPaddingRight(),s=d.x(t[0].x)+20):(o=(a=r+d.getCurrentPaddingLeft(!0)+d.x(t[0].x)+20)+e,c=r+d.currentWidth-d.getCurrentPaddingRight(),s=g[1]+15),c<o&&(a-=o-c+20),s+i>d.currentHeight&&(s-=i+30)),s<0&&(s=0),{top:s,left:a}},l.prototype.showTooltip=function(t,e){var i,n,r,a=this,o=a.config,s=a.hasArcType(),c=t.filter(function(t){return t&&P(t.value)}),d=o.tooltip_position||l.prototype.tooltipPosition;0!==c.length&&o.tooltip_show&&(a.tooltip.html(o.tooltip_contents.call(a,t,a.axis.getXAxisTickFormat(),a.getYFormat(s),a.color)).style("display","block"),i=a.tooltip.property("offsetWidth"),n=a.tooltip.property("offsetHeight"),r=d.call(this,c,i,n,e),a.tooltip.style("top",r.top+"px").style("left",r.left+"px"))},l.prototype.hideTooltip=function(){this.tooltip.style("display","none")},l.prototype.setTargetType=function(t,e){var i=this,n=i.config;i.mapToTargetIds(t).forEach(function(t){i.withoutFadeIn[t]=e===n.data_types[t],n.data_types[t]=e}),t||(n.data_type=e)},l.prototype.hasType=function(i,t){var n=this.config.data_types,r=!1;return(t=t||this.data.targets)&&t.length?t.forEach(function(t){var e=n[t.id];(e&&0<=e.indexOf(i)||!e&&"line"===i)&&(r=!0)}):Object.keys(n).length?Object.keys(n).forEach(function(t){n[t]===i&&(r=!0)}):r=this.config.data_type===i,r},l.prototype.hasArcType=function(t){return this.hasType("pie",t)||this.hasType("donut",t)||this.hasType("gauge",t)},l.prototype.isLineType=function(t){var e=this.config,i=c(t)?t:t.id;return!e.data_types[i]||0<=["line","spline","area","area-spline","step","area-step"].indexOf(e.data_types[i])},l.prototype.isStepType=function(t){var e=c(t)?t:t.id;return 0<=["step","area-step"].indexOf(this.config.data_types[e])},l.prototype.isSplineType=function(t){var e=c(t)?t:t.id;return 0<=["spline","area-spline"].indexOf(this.config.data_types[e])},l.prototype.isAreaType=function(t){var e=c(t)?t:t.id;return 0<=["area","area-spline","area-step"].indexOf(this.config.data_types[e])},l.prototype.isBarType=function(t){var e=c(t)?t:t.id;return"bar"===this.config.data_types[e]},l.prototype.isScatterType=function(t){var e=c(t)?t:t.id;return"scatter"===this.config.data_types[e]},l.prototype.isPieType=function(t){var e=c(t)?t:t.id;return"pie"===this.config.data_types[e]},l.prototype.isGaugeType=function(t){var e=c(t)?t:t.id;return"gauge"===this.config.data_types[e]},l.prototype.isDonutType=function(t){var e=c(t)?t:t.id;return"donut"===this.config.data_types[e]},l.prototype.isArcType=function(t){return this.isPieType(t)||this.isDonutType(t)||this.isGaugeType(t)},l.prototype.lineData=function(t){return this.isLineType(t)?[t]:[]},l.prototype.arcData=function(t){return this.isArcType(t.data)?[t]:[]},l.prototype.barData=function(t){return this.isBarType(t)?t.values:[]},l.prototype.lineOrScatterData=function(t){return this.isLineType(t)||this.isScatterType(t)?t.values:[]},l.prototype.barOrLineData=function(t){return this.isBarType(t)||this.isLineType(t)?t.values:[]},l.prototype.isSafari=function(){var t=window.navigator.userAgent;return 0<=t.indexOf("Safari")&&t.indexOf("Chrome")<0},l.prototype.isChrome=function(){return 0<=window.navigator.userAgent.indexOf("Chrome")},l.prototype.initZoom=function(){var e,i=this,n=i.d3,r=i.config;return i.zoom=n.zoom().on("start",function(){if("scroll"===r.zoom_type){var t=n.event.sourceEvent;t&&"brush"===t.type||(e=t,r.zoom_onzoomstart.call(i.api,t))}}).on("zoom",function(){if("scroll"===r.zoom_type){var t=n.event.sourceEvent;t&&"brush"===t.type||(i.redrawForZoom(),r.zoom_onzoom.call(i.api,i.x.orgDomain()))}}).on("end",function(){if("scroll"===r.zoom_type){var t=n.event.sourceEvent;t&&"brush"===t.type||t&&e.clientX===t.clientX&&e.clientY===t.clientY||r.zoom_onzoomend.call(i.api,i.x.orgDomain())}}),i.zoom.updateDomain=function(){return n.event&&n.event.transform&&i.x.domain(n.event.transform.rescaleX(i.subX).domain()),this},i.zoom.updateExtent=function(){return this.scaleExtent([1,1/0]).translateExtent([[0,0],[i.width,i.height]]).extent([[0,0],[i.width,i.height]]),this},i.zoom.update=function(){return this.updateExtent().updateDomain()},i.zoom.updateExtent()},l.prototype.zoomTransform=function(t){var e=[this.x(t[0]),this.x(t[1])];return this.d3.zoomIdentity.scale(this.width/(e[1]-e[0])).translate(-e[0],0)},l.prototype.initDragZoom=function(){var e=this,i=e.d3,n=e.config,t=e.context=e.svg,r=e.margin.left+20.5,a=e.margin.top+.5;if("drag"===n.zoom_type&&n.zoom_enabled){var o=function(t){return t&&t.map(function(t){return e.x.invert(t)})},s=e.dragZoomBrush=i.brushX().on("start",function(){e.api.unzoom(),e.svg.select("."+Y.dragZoom).classed("disabled",!1),n.zoom_onzoomstart.call(e.api,i.event.sourceEvent)}).on("brush",function(){n.zoom_onzoom.call(e.api,o(i.event.selection))}).on("end",function(){if(null!=i.event.selection){var t=o(i.event.selection);n.zoom_disableDefaultBehavior||e.api.zoom(t),e.svg.select("."+Y.dragZoom).classed("disabled",!0),n.zoom_onzoomend.call(e.api,t)}});t.append("g").classed(Y.dragZoom,!0).attr("clip-path",e.clipPath).attr("transform","translate("+r+","+a+")").call(s)}},l.prototype.getZoomDomain=function(){var t=this.config,e=this.d3;return[e.min([this.orgXDomain[0],t.zoom_x_min]),e.max([this.orgXDomain[1],t.zoom_x_max])]},l.prototype.redrawForZoom=function(){var t=this,e=t.d3,i=t.config,n=t.zoom,r=t.x;i.zoom_enabled&&0!==t.filterTargetsToShow(t.data.targets).length&&(n.update(),i.zoom_disableDefaultBehavior||(t.isCategorized()&&r.orgDomain()[0]===t.orgXDomain[0]&&r.domain([t.orgXDomain[0]-1e-10,r.orgDomain()[1]]),t.redraw({withTransition:!1,withY:i.zoom_rescale,withSubchart:!1,withEventRect:!1,withDimension:!1}),e.event.sourceEvent&&"mousemove"===e.event.sourceEvent.type&&(t.cancelClick=!0)))},t});
\ No newline at end of file
diff --git a/web/static/d3.js b/web/static/d3.js
new file mode 100644
index 0000000..e6e7e30
--- /dev/null
+++ b/web/static/d3.js
@@ -0,0 +1,17847 @@
+// https://d3js.org Version 5.5.0. Copyright 2018 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var version = "5.5.0";
+
+function ascending(a, b) {
+  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+}
+
+function bisector(compare) {
+  if (compare.length === 1) compare = ascendingComparator(compare);
+  return {
+    left: function(a, x, lo, hi) {
+      if (lo == null) lo = 0;
+      if (hi == null) hi = a.length;
+      while (lo < hi) {
+        var mid = lo + hi >>> 1;
+        if (compare(a[mid], x) < 0) lo = mid + 1;
+        else hi = mid;
+      }
+      return lo;
+    },
+    right: function(a, x, lo, hi) {
+      if (lo == null) lo = 0;
+      if (hi == null) hi = a.length;
+      while (lo < hi) {
+        var mid = lo + hi >>> 1;
+        if (compare(a[mid], x) > 0) hi = mid;
+        else lo = mid + 1;
+      }
+      return lo;
+    }
+  };
+}
+
+function ascendingComparator(f) {
+  return function(d, x) {
+    return ascending(f(d), x);
+  };
+}
+
+var ascendingBisect = bisector(ascending);
+var bisectRight = ascendingBisect.right;
+var bisectLeft = ascendingBisect.left;
+
+function pairs(array, f) {
+  if (f == null) f = pair;
+  var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);
+  while (i < n) pairs[i] = f(p, p = array[++i]);
+  return pairs;
+}
+
+function pair(a, b) {
+  return [a, b];
+}
+
+function cross(values0, values1, reduce) {
+  var n0 = values0.length,
+      n1 = values1.length,
+      values = new Array(n0 * n1),
+      i0,
+      i1,
+      i,
+      value0;
+
+  if (reduce == null) reduce = pair;
+
+  for (i0 = i = 0; i0 < n0; ++i0) {
+    for (value0 = values0[i0], i1 = 0; i1 < n1; ++i1, ++i) {
+      values[i] = reduce(value0, values1[i1]);
+    }
+  }
+
+  return values;
+}
+
+function descending(a, b) {
+  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+}
+
+function number(x) {
+  return x === null ? NaN : +x;
+}
+
+function variance(values, valueof) {
+  var n = values.length,
+      m = 0,
+      i = -1,
+      mean = 0,
+      value,
+      delta,
+      sum = 0;
+
+  if (valueof == null) {
+    while (++i < n) {
+      if (!isNaN(value = number(values[i]))) {
+        delta = value - mean;
+        mean += delta / ++m;
+        sum += delta * (value - mean);
+      }
+    }
+  }
+
+  else {
+    while (++i < n) {
+      if (!isNaN(value = number(valueof(values[i], i, values)))) {
+        delta = value - mean;
+        mean += delta / ++m;
+        sum += delta * (value - mean);
+      }
+    }
+  }
+
+  if (m > 1) return sum / (m - 1);
+}
+
+function deviation(array, f) {
+  var v = variance(array, f);
+  return v ? Math.sqrt(v) : v;
+}
+
+function extent(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      min,
+      max;
+
+  if (valueof == null) {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = values[i]) != null && value >= value) {
+        min = max = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = values[i]) != null) {
+            if (min > value) min = value;
+            if (max < value) max = value;
+          }
+        }
+      }
+    }
+  }
+
+  else {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = valueof(values[i], i, values)) != null && value >= value) {
+        min = max = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = valueof(values[i], i, values)) != null) {
+            if (min > value) min = value;
+            if (max < value) max = value;
+          }
+        }
+      }
+    }
+  }
+
+  return [min, max];
+}
+
+var array = Array.prototype;
+
+var slice = array.slice;
+var map = array.map;
+
+function constant(x) {
+  return function() {
+    return x;
+  };
+}
+
+function identity(x) {
+  return x;
+}
+
+function sequence(start, stop, step) {
+  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+
+  var i = -1,
+      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
+      range = new Array(n);
+
+  while (++i < n) {
+    range[i] = start + i * step;
+  }
+
+  return range;
+}
+
+var e10 = Math.sqrt(50),
+    e5 = Math.sqrt(10),
+    e2 = Math.sqrt(2);
+
+function ticks(start, stop, count) {
+  var reverse,
+      i = -1,
+      n,
+      ticks,
+      step;
+
+  stop = +stop, start = +start, count = +count;
+  if (start === stop && count > 0) return [start];
+  if (reverse = stop < start) n = start, start = stop, stop = n;
+  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
+
+  if (step > 0) {
+    start = Math.ceil(start / step);
+    stop = Math.floor(stop / step);
+    ticks = new Array(n = Math.ceil(stop - start + 1));
+    while (++i < n) ticks[i] = (start + i) * step;
+  } else {
+    start = Math.floor(start * step);
+    stop = Math.ceil(stop * step);
+    ticks = new Array(n = Math.ceil(start - stop + 1));
+    while (++i < n) ticks[i] = (start - i) / step;
+  }
+
+  if (reverse) ticks.reverse();
+
+  return ticks;
+}
+
+function tickIncrement(start, stop, count) {
+  var step = (stop - start) / Math.max(0, count),
+      power = Math.floor(Math.log(step) / Math.LN10),
+      error = step / Math.pow(10, power);
+  return power >= 0
+      ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
+      : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
+}
+
+function tickStep(start, stop, count) {
+  var step0 = Math.abs(stop - start) / Math.max(0, count),
+      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
+      error = step0 / step1;
+  if (error >= e10) step1 *= 10;
+  else if (error >= e5) step1 *= 5;
+  else if (error >= e2) step1 *= 2;
+  return stop < start ? -step1 : step1;
+}
+
+function thresholdSturges(values) {
+  return Math.ceil(Math.log(values.length) / Math.LN2) + 1;
+}
+
+function histogram() {
+  var value = identity,
+      domain = extent,
+      threshold = thresholdSturges;
+
+  function histogram(data) {
+    var i,
+        n = data.length,
+        x,
+        values = new Array(n);
+
+    for (i = 0; i < n; ++i) {
+      values[i] = value(data[i], i, data);
+    }
+
+    var xz = domain(values),
+        x0 = xz[0],
+        x1 = xz[1],
+        tz = threshold(values, x0, x1);
+
+    // Convert number of thresholds into uniform thresholds.
+    if (!Array.isArray(tz)) {
+      tz = tickStep(x0, x1, tz);
+      tz = sequence(Math.ceil(x0 / tz) * tz, Math.floor(x1 / tz) * tz, tz); // exclusive
+    }
+
+    // Remove any thresholds outside the domain.
+    var m = tz.length;
+    while (tz[0] <= x0) tz.shift(), --m;
+    while (tz[m - 1] > x1) tz.pop(), --m;
+
+    var bins = new Array(m + 1),
+        bin;
+
+    // Initialize bins.
+    for (i = 0; i <= m; ++i) {
+      bin = bins[i] = [];
+      bin.x0 = i > 0 ? tz[i - 1] : x0;
+      bin.x1 = i < m ? tz[i] : x1;
+    }
+
+    // Assign data to bins by value, ignoring any outside the domain.
+    for (i = 0; i < n; ++i) {
+      x = values[i];
+      if (x0 <= x && x <= x1) {
+        bins[bisectRight(tz, x, 0, m)].push(data[i]);
+      }
+    }
+
+    return bins;
+  }
+
+  histogram.value = function(_) {
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant(_), histogram) : value;
+  };
+
+  histogram.domain = function(_) {
+    return arguments.length ? (domain = typeof _ === "function" ? _ : constant([_[0], _[1]]), histogram) : domain;
+  };
+
+  histogram.thresholds = function(_) {
+    return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;
+  };
+
+  return histogram;
+}
+
+function threshold(values, p, valueof) {
+  if (valueof == null) valueof = number;
+  if (!(n = values.length)) return;
+  if ((p = +p) <= 0 || n < 2) return +valueof(values[0], 0, values);
+  if (p >= 1) return +valueof(values[n - 1], n - 1, values);
+  var n,
+      i = (n - 1) * p,
+      i0 = Math.floor(i),
+      value0 = +valueof(values[i0], i0, values),
+      value1 = +valueof(values[i0 + 1], i0 + 1, values);
+  return value0 + (value1 - value0) * (i - i0);
+}
+
+function freedmanDiaconis(values, min, max) {
+  values = map.call(values, number).sort(ascending);
+  return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));
+}
+
+function scott(values, min, max) {
+  return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));
+}
+
+function max(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      max;
+
+  if (valueof == null) {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = values[i]) != null && value >= value) {
+        max = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = values[i]) != null && value > max) {
+            max = value;
+          }
+        }
+      }
+    }
+  }
+
+  else {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = valueof(values[i], i, values)) != null && value >= value) {
+        max = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = valueof(values[i], i, values)) != null && value > max) {
+            max = value;
+          }
+        }
+      }
+    }
+  }
+
+  return max;
+}
+
+function mean(values, valueof) {
+  var n = values.length,
+      m = n,
+      i = -1,
+      value,
+      sum = 0;
+
+  if (valueof == null) {
+    while (++i < n) {
+      if (!isNaN(value = number(values[i]))) sum += value;
+      else --m;
+    }
+  }
+
+  else {
+    while (++i < n) {
+      if (!isNaN(value = number(valueof(values[i], i, values)))) sum += value;
+      else --m;
+    }
+  }
+
+  if (m) return sum / m;
+}
+
+function median(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      numbers = [];
+
+  if (valueof == null) {
+    while (++i < n) {
+      if (!isNaN(value = number(values[i]))) {
+        numbers.push(value);
+      }
+    }
+  }
+
+  else {
+    while (++i < n) {
+      if (!isNaN(value = number(valueof(values[i], i, values)))) {
+        numbers.push(value);
+      }
+    }
+  }
+
+  return threshold(numbers.sort(ascending), 0.5);
+}
+
+function merge(arrays) {
+  var n = arrays.length,
+      m,
+      i = -1,
+      j = 0,
+      merged,
+      array;
+
+  while (++i < n) j += arrays[i].length;
+  merged = new Array(j);
+
+  while (--n >= 0) {
+    array = arrays[n];
+    m = array.length;
+    while (--m >= 0) {
+      merged[--j] = array[m];
+    }
+  }
+
+  return merged;
+}
+
+function min(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      min;
+
+  if (valueof == null) {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = values[i]) != null && value >= value) {
+        min = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = values[i]) != null && min > value) {
+            min = value;
+          }
+        }
+      }
+    }
+  }
+
+  else {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = valueof(values[i], i, values)) != null && value >= value) {
+        min = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = valueof(values[i], i, values)) != null && min > value) {
+            min = value;
+          }
+        }
+      }
+    }
+  }
+
+  return min;
+}
+
+function permute(array, indexes) {
+  var i = indexes.length, permutes = new Array(i);
+  while (i--) permutes[i] = array[indexes[i]];
+  return permutes;
+}
+
+function scan(values, compare) {
+  if (!(n = values.length)) return;
+  var n,
+      i = 0,
+      j = 0,
+      xi,
+      xj = values[j];
+
+  if (compare == null) compare = ascending;
+
+  while (++i < n) {
+    if (compare(xi = values[i], xj) < 0 || compare(xj, xj) !== 0) {
+      xj = xi, j = i;
+    }
+  }
+
+  if (compare(xj, xj) === 0) return j;
+}
+
+function shuffle(array, i0, i1) {
+  var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),
+      t,
+      i;
+
+  while (m) {
+    i = Math.random() * m-- | 0;
+    t = array[m + i0];
+    array[m + i0] = array[i + i0];
+    array[i + i0] = t;
+  }
+
+  return array;
+}
+
+function sum(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      sum = 0;
+
+  if (valueof == null) {
+    while (++i < n) {
+      if (value = +values[i]) sum += value; // Note: zero and null are equivalent.
+    }
+  }
+
+  else {
+    while (++i < n) {
+      if (value = +valueof(values[i], i, values)) sum += value;
+    }
+  }
+
+  return sum;
+}
+
+function transpose(matrix) {
+  if (!(n = matrix.length)) return [];
+  for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {
+    for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
+      row[j] = matrix[j][i];
+    }
+  }
+  return transpose;
+}
+
+function length(d) {
+  return d.length;
+}
+
+function zip() {
+  return transpose(arguments);
+}
+
+var slice$1 = Array.prototype.slice;
+
+function identity$1(x) {
+  return x;
+}
+
+var top = 1,
+    right = 2,
+    bottom = 3,
+    left = 4,
+    epsilon = 1e-6;
+
+function translateX(x) {
+  return "translate(" + (x + 0.5) + ",0)";
+}
+
+function translateY(y) {
+  return "translate(0," + (y + 0.5) + ")";
+}
+
+function number$1(scale) {
+  return function(d) {
+    return +scale(d);
+  };
+}
+
+function center(scale) {
+  var offset = Math.max(0, scale.bandwidth() - 1) / 2; // Adjust for 0.5px offset.
+  if (scale.round()) offset = Math.round(offset);
+  return function(d) {
+    return +scale(d) + offset;
+  };
+}
+
+function entering() {
+  return !this.__axis;
+}
+
+function axis(orient, scale) {
+  var tickArguments = [],
+      tickValues = null,
+      tickFormat = null,
+      tickSizeInner = 6,
+      tickSizeOuter = 6,
+      tickPadding = 3,
+      k = orient === top || orient === left ? -1 : 1,
+      x = orient === left || orient === right ? "x" : "y",
+      transform = orient === top || orient === bottom ? translateX : translateY;
+
+  function axis(context) {
+    var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,
+        format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$1) : tickFormat,
+        spacing = Math.max(tickSizeInner, 0) + tickPadding,
+        range = scale.range(),
+        range0 = +range[0] + 0.5,
+        range1 = +range[range.length - 1] + 0.5,
+        position = (scale.bandwidth ? center : number$1)(scale.copy()),
+        selection = context.selection ? context.selection() : context,
+        path = selection.selectAll(".domain").data([null]),
+        tick = selection.selectAll(".tick").data(values, scale).order(),
+        tickExit = tick.exit(),
+        tickEnter = tick.enter().append("g").attr("class", "tick"),
+        line = tick.select("line"),
+        text = tick.select("text");
+
+    path = path.merge(path.enter().insert("path", ".tick")
+        .attr("class", "domain")
+        .attr("stroke", "#000"));
+
+    tick = tick.merge(tickEnter);
+
+    line = line.merge(tickEnter.append("line")
+        .attr("stroke", "#000")
+        .attr(x + "2", k * tickSizeInner));
+
+    text = text.merge(tickEnter.append("text")
+        .attr("fill", "#000")
+        .attr(x, k * spacing)
+        .attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em"));
+
+    if (context !== selection) {
+      path = path.transition(context);
+      tick = tick.transition(context);
+      line = line.transition(context);
+      text = text.transition(context);
+
+      tickExit = tickExit.transition(context)
+          .attr("opacity", epsilon)
+          .attr("transform", function(d) { return isFinite(d = position(d)) ? transform(d) : this.getAttribute("transform"); });
+
+      tickEnter
+          .attr("opacity", epsilon)
+          .attr("transform", function(d) { var p = this.parentNode.__axis; return transform(p && isFinite(p = p(d)) ? p : position(d)); });
+    }
+
+    tickExit.remove();
+
+    path
+        .attr("d", orient === left || orient == right
+            ? "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter
+            : "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter);
+
+    tick
+        .attr("opacity", 1)
+        .attr("transform", function(d) { return transform(position(d)); });
+
+    line
+        .attr(x + "2", k * tickSizeInner);
+
+    text
+        .attr(x, k * spacing)
+        .text(format);
+
+    selection.filter(entering)
+        .attr("fill", "none")
+        .attr("font-size", 10)
+        .attr("font-family", "sans-serif")
+        .attr("text-anchor", orient === right ? "start" : orient === left ? "end" : "middle");
+
+    selection
+        .each(function() { this.__axis = position; });
+  }
+
+  axis.scale = function(_) {
+    return arguments.length ? (scale = _, axis) : scale;
+  };
+
+  axis.ticks = function() {
+    return tickArguments = slice$1.call(arguments), axis;
+  };
+
+  axis.tickArguments = function(_) {
+    return arguments.length ? (tickArguments = _ == null ? [] : slice$1.call(_), axis) : tickArguments.slice();
+  };
+
+  axis.tickValues = function(_) {
+    return arguments.length ? (tickValues = _ == null ? null : slice$1.call(_), axis) : tickValues && tickValues.slice();
+  };
+
+  axis.tickFormat = function(_) {
+    return arguments.length ? (tickFormat = _, axis) : tickFormat;
+  };
+
+  axis.tickSize = function(_) {
+    return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;
+  };
+
+  axis.tickSizeInner = function(_) {
+    return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;
+  };
+
+  axis.tickSizeOuter = function(_) {
+    return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;
+  };
+
+  axis.tickPadding = function(_) {
+    return arguments.length ? (tickPadding = +_, axis) : tickPadding;
+  };
+
+  return axis;
+}
+
+function axisTop(scale) {
+  return axis(top, scale);
+}
+
+function axisRight(scale) {
+  return axis(right, scale);
+}
+
+function axisBottom(scale) {
+  return axis(bottom, scale);
+}
+
+function axisLeft(scale) {
+  return axis(left, scale);
+}
+
+var noop = {value: function() {}};
+
+function dispatch() {
+  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+    if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
+    _[t] = [];
+  }
+  return new Dispatch(_);
+}
+
+function Dispatch(_) {
+  this._ = _;
+}
+
+function parseTypenames(typenames, types) {
+  return typenames.trim().split(/^|\s+/).map(function(t) {
+    var name = "", i = t.indexOf(".");
+    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+    return {type: t, name: name};
+  });
+}
+
+Dispatch.prototype = dispatch.prototype = {
+  constructor: Dispatch,
+  on: function(typename, callback) {
+    var _ = this._,
+        T = parseTypenames(typename + "", _),
+        t,
+        i = -1,
+        n = T.length;
+
+    // If no callback was specified, return the callback of the given type and name.
+    if (arguments.length < 2) {
+      while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
+      return;
+    }
+
+    // If a type was specified, set the callback for the given type and name.
+    // Otherwise, if a null callback was specified, remove callbacks of the given name.
+    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+    while (++i < n) {
+      if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
+      else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);
+    }
+
+    return this;
+  },
+  copy: function() {
+    var copy = {}, _ = this._;
+    for (var t in _) copy[t] = _[t].slice();
+    return new Dispatch(copy);
+  },
+  call: function(type, that) {
+    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
+    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+  },
+  apply: function(type, that, args) {
+    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+  }
+};
+
+function get(type, name) {
+  for (var i = 0, n = type.length, c; i < n; ++i) {
+    if ((c = type[i]).name === name) {
+      return c.value;
+    }
+  }
+}
+
+function set(type, name, callback) {
+  for (var i = 0, n = type.length; i < n; ++i) {
+    if (type[i].name === name) {
+      type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
+      break;
+    }
+  }
+  if (callback != null) type.push({name: name, value: callback});
+  return type;
+}
+
+var xhtml = "http://www.w3.org/1999/xhtml";
+
+var namespaces = {
+  svg: "http://www.w3.org/2000/svg",
+  xhtml: xhtml,
+  xlink: "http://www.w3.org/1999/xlink",
+  xml: "http://www.w3.org/XML/1998/namespace",
+  xmlns: "http://www.w3.org/2000/xmlns/"
+};
+
+function namespace(name) {
+  var prefix = name += "", i = prefix.indexOf(":");
+  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
+}
+
+function creatorInherit(name) {
+  return function() {
+    var document = this.ownerDocument,
+        uri = this.namespaceURI;
+    return uri === xhtml && document.documentElement.namespaceURI === xhtml
+        ? document.createElement(name)
+        : document.createElementNS(uri, name);
+  };
+}
+
+function creatorFixed(fullname) {
+  return function() {
+    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+  };
+}
+
+function creator(name) {
+  var fullname = namespace(name);
+  return (fullname.local
+      ? creatorFixed
+      : creatorInherit)(fullname);
+}
+
+function none() {}
+
+function selector(selector) {
+  return selector == null ? none : function() {
+    return this.querySelector(selector);
+  };
+}
+
+function selection_select(select) {
+  if (typeof select !== "function") select = selector(select);
+
+  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+        if ("__data__" in node) subnode.__data__ = node.__data__;
+        subgroup[i] = subnode;
+      }
+    }
+  }
+
+  return new Selection(subgroups, this._parents);
+}
+
+function empty() {
+  return [];
+}
+
+function selectorAll(selector) {
+  return selector == null ? empty : function() {
+    return this.querySelectorAll(selector);
+  };
+}
+
+function selection_selectAll(select) {
+  if (typeof select !== "function") select = selectorAll(select);
+
+  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        subgroups.push(select.call(node, node.__data__, i, group));
+        parents.push(node);
+      }
+    }
+  }
+
+  return new Selection(subgroups, parents);
+}
+
+var matcher = function(selector) {
+  return function() {
+    return this.matches(selector);
+  };
+};
+
+if (typeof document !== "undefined") {
+  var element = document.documentElement;
+  if (!element.matches) {
+    var vendorMatches = element.webkitMatchesSelector
+        || element.msMatchesSelector
+        || element.mozMatchesSelector
+        || element.oMatchesSelector;
+    matcher = function(selector) {
+      return function() {
+        return vendorMatches.call(this, selector);
+      };
+    };
+  }
+}
+
+var matcher$1 = matcher;
+
+function selection_filter(match) {
+  if (typeof match !== "function") match = matcher$1(match);
+
+  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+        subgroup.push(node);
+      }
+    }
+  }
+
+  return new Selection(subgroups, this._parents);
+}
+
+function sparse(update) {
+  return new Array(update.length);
+}
+
+function selection_enter() {
+  return new Selection(this._enter || this._groups.map(sparse), this._parents);
+}
+
+function EnterNode(parent, datum) {
+  this.ownerDocument = parent.ownerDocument;
+  this.namespaceURI = parent.namespaceURI;
+  this._next = null;
+  this._parent = parent;
+  this.__data__ = datum;
+}
+
+EnterNode.prototype = {
+  constructor: EnterNode,
+  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
+  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
+  querySelector: function(selector) { return this._parent.querySelector(selector); },
+  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
+};
+
+function constant$1(x) {
+  return function() {
+    return x;
+  };
+}
+
+var keyPrefix = "$"; // Protect against keys like “__proto__”.
+
+function bindIndex(parent, group, enter, update, exit, data) {
+  var i = 0,
+      node,
+      groupLength = group.length,
+      dataLength = data.length;
+
+  // Put any non-null nodes that fit into update.
+  // Put any null nodes into enter.
+  // Put any remaining data into enter.
+  for (; i < dataLength; ++i) {
+    if (node = group[i]) {
+      node.__data__ = data[i];
+      update[i] = node;
+    } else {
+      enter[i] = new EnterNode(parent, data[i]);
+    }
+  }
+
+  // Put any non-null nodes that don’t fit into exit.
+  for (; i < groupLength; ++i) {
+    if (node = group[i]) {
+      exit[i] = node;
+    }
+  }
+}
+
+function bindKey(parent, group, enter, update, exit, data, key) {
+  var i,
+      node,
+      nodeByKeyValue = {},
+      groupLength = group.length,
+      dataLength = data.length,
+      keyValues = new Array(groupLength),
+      keyValue;
+
+  // Compute the key for each node.
+  // If multiple nodes have the same key, the duplicates are added to exit.
+  for (i = 0; i < groupLength; ++i) {
+    if (node = group[i]) {
+      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
+      if (keyValue in nodeByKeyValue) {
+        exit[i] = node;
+      } else {
+        nodeByKeyValue[keyValue] = node;
+      }
+    }
+  }
+
+  // Compute the key for each datum.
+  // If there a node associated with this key, join and add it to update.
+  // If there is not (or the key is a duplicate), add it to enter.
+  for (i = 0; i < dataLength; ++i) {
+    keyValue = keyPrefix + key.call(parent, data[i], i, data);
+    if (node = nodeByKeyValue[keyValue]) {
+      update[i] = node;
+      node.__data__ = data[i];
+      nodeByKeyValue[keyValue] = null;
+    } else {
+      enter[i] = new EnterNode(parent, data[i]);
+    }
+  }
+
+  // Add any remaining nodes that were not bound to data to exit.
+  for (i = 0; i < groupLength; ++i) {
+    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
+      exit[i] = node;
+    }
+  }
+}
+
+function selection_data(value, key) {
+  if (!value) {
+    data = new Array(this.size()), j = -1;
+    this.each(function(d) { data[++j] = d; });
+    return data;
+  }
+
+  var bind = key ? bindKey : bindIndex,
+      parents = this._parents,
+      groups = this._groups;
+
+  if (typeof value !== "function") value = constant$1(value);
+
+  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+    var parent = parents[j],
+        group = groups[j],
+        groupLength = group.length,
+        data = value.call(parent, parent && parent.__data__, j, parents),
+        dataLength = data.length,
+        enterGroup = enter[j] = new Array(dataLength),
+        updateGroup = update[j] = new Array(dataLength),
+        exitGroup = exit[j] = new Array(groupLength);
+
+    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
+
+    // Now connect the enter nodes to their following update node, such that
+    // appendChild can insert the materialized enter node before this node,
+    // rather than at the end of the parent node.
+    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+      if (previous = enterGroup[i0]) {
+        if (i0 >= i1) i1 = i0 + 1;
+        while (!(next = updateGroup[i1]) && ++i1 < dataLength);
+        previous._next = next || null;
+      }
+    }
+  }
+
+  update = new Selection(update, parents);
+  update._enter = enter;
+  update._exit = exit;
+  return update;
+}
+
+function selection_exit() {
+  return new Selection(this._exit || this._groups.map(sparse), this._parents);
+}
+
+function selection_merge(selection$$1) {
+
+  for (var groups0 = this._groups, groups1 = selection$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+      if (node = group0[i] || group1[i]) {
+        merge[i] = node;
+      }
+    }
+  }
+
+  for (; j < m0; ++j) {
+    merges[j] = groups0[j];
+  }
+
+  return new Selection(merges, this._parents);
+}
+
+function selection_order() {
+
+  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+      if (node = group[i]) {
+        if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
+        next = node;
+      }
+    }
+  }
+
+  return this;
+}
+
+function selection_sort(compare) {
+  if (!compare) compare = ascending$1;
+
+  function compareNode(a, b) {
+    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+  }
+
+  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        sortgroup[i] = node;
+      }
+    }
+    sortgroup.sort(compareNode);
+  }
+
+  return new Selection(sortgroups, this._parents).order();
+}
+
+function ascending$1(a, b) {
+  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+}
+
+function selection_call() {
+  var callback = arguments[0];
+  arguments[0] = this;
+  callback.apply(null, arguments);
+  return this;
+}
+
+function selection_nodes() {
+  var nodes = new Array(this.size()), i = -1;
+  this.each(function() { nodes[++i] = this; });
+  return nodes;
+}
+
+function selection_node() {
+
+  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+      var node = group[i];
+      if (node) return node;
+    }
+  }
+
+  return null;
+}
+
+function selection_size() {
+  var size = 0;
+  this.each(function() { ++size; });
+  return size;
+}
+
+function selection_empty() {
+  return !this.node();
+}
+
+function selection_each(callback) {
+
+  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+      if (node = group[i]) callback.call(node, node.__data__, i, group);
+    }
+  }
+
+  return this;
+}
+
+function attrRemove(name) {
+  return function() {
+    this.removeAttribute(name);
+  };
+}
+
+function attrRemoveNS(fullname) {
+  return function() {
+    this.removeAttributeNS(fullname.space, fullname.local);
+  };
+}
+
+function attrConstant(name, value) {
+  return function() {
+    this.setAttribute(name, value);
+  };
+}
+
+function attrConstantNS(fullname, value) {
+  return function() {
+    this.setAttributeNS(fullname.space, fullname.local, value);
+  };
+}
+
+function attrFunction(name, value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    if (v == null) this.removeAttribute(name);
+    else this.setAttribute(name, v);
+  };
+}
+
+function attrFunctionNS(fullname, value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
+    else this.setAttributeNS(fullname.space, fullname.local, v);
+  };
+}
+
+function selection_attr(name, value) {
+  var fullname = namespace(name);
+
+  if (arguments.length < 2) {
+    var node = this.node();
+    return fullname.local
+        ? node.getAttributeNS(fullname.space, fullname.local)
+        : node.getAttribute(fullname);
+  }
+
+  return this.each((value == null
+      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
+      ? (fullname.local ? attrFunctionNS : attrFunction)
+      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
+}
+
+function defaultView(node) {
+  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
+      || (node.document && node) // node is a Window
+      || node.defaultView; // node is a Document
+}
+
+function styleRemove(name) {
+  return function() {
+    this.style.removeProperty(name);
+  };
+}
+
+function styleConstant(name, value, priority) {
+  return function() {
+    this.style.setProperty(name, value, priority);
+  };
+}
+
+function styleFunction(name, value, priority) {
+  return function() {
+    var v = value.apply(this, arguments);
+    if (v == null) this.style.removeProperty(name);
+    else this.style.setProperty(name, v, priority);
+  };
+}
+
+function selection_style(name, value, priority) {
+  return arguments.length > 1
+      ? this.each((value == null
+            ? styleRemove : typeof value === "function"
+            ? styleFunction
+            : styleConstant)(name, value, priority == null ? "" : priority))
+      : styleValue(this.node(), name);
+}
+
+function styleValue(node, name) {
+  return node.style.getPropertyValue(name)
+      || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
+}
+
+function propertyRemove(name) {
+  return function() {
+    delete this[name];
+  };
+}
+
+function propertyConstant(name, value) {
+  return function() {
+    this[name] = value;
+  };
+}
+
+function propertyFunction(name, value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    if (v == null) delete this[name];
+    else this[name] = v;
+  };
+}
+
+function selection_property(name, value) {
+  return arguments.length > 1
+      ? this.each((value == null
+          ? propertyRemove : typeof value === "function"
+          ? propertyFunction
+          : propertyConstant)(name, value))
+      : this.node()[name];
+}
+
+function classArray(string) {
+  return string.trim().split(/^|\s+/);
+}
+
+function classList(node) {
+  return node.classList || new ClassList(node);
+}
+
+function ClassList(node) {
+  this._node = node;
+  this._names = classArray(node.getAttribute("class") || "");
+}
+
+ClassList.prototype = {
+  add: function(name) {
+    var i = this._names.indexOf(name);
+    if (i < 0) {
+      this._names.push(name);
+      this._node.setAttribute("class", this._names.join(" "));
+    }
+  },
+  remove: function(name) {
+    var i = this._names.indexOf(name);
+    if (i >= 0) {
+      this._names.splice(i, 1);
+      this._node.setAttribute("class", this._names.join(" "));
+    }
+  },
+  contains: function(name) {
+    return this._names.indexOf(name) >= 0;
+  }
+};
+
+function classedAdd(node, names) {
+  var list = classList(node), i = -1, n = names.length;
+  while (++i < n) list.add(names[i]);
+}
+
+function classedRemove(node, names) {
+  var list = classList(node), i = -1, n = names.length;
+  while (++i < n) list.remove(names[i]);
+}
+
+function classedTrue(names) {
+  return function() {
+    classedAdd(this, names);
+  };
+}
+
+function classedFalse(names) {
+  return function() {
+    classedRemove(this, names);
+  };
+}
+
+function classedFunction(names, value) {
+  return function() {
+    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+  };
+}
+
+function selection_classed(name, value) {
+  var names = classArray(name + "");
+
+  if (arguments.length < 2) {
+    var list = classList(this.node()), i = -1, n = names.length;
+    while (++i < n) if (!list.contains(names[i])) return false;
+    return true;
+  }
+
+  return this.each((typeof value === "function"
+      ? classedFunction : value
+      ? classedTrue
+      : classedFalse)(names, value));
+}
+
+function textRemove() {
+  this.textContent = "";
+}
+
+function textConstant(value) {
+  return function() {
+    this.textContent = value;
+  };
+}
+
+function textFunction(value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    this.textContent = v == null ? "" : v;
+  };
+}
+
+function selection_text(value) {
+  return arguments.length
+      ? this.each(value == null
+          ? textRemove : (typeof value === "function"
+          ? textFunction
+          : textConstant)(value))
+      : this.node().textContent;
+}
+
+function htmlRemove() {
+  this.innerHTML = "";
+}
+
+function htmlConstant(value) {
+  return function() {
+    this.innerHTML = value;
+  };
+}
+
+function htmlFunction(value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    this.innerHTML = v == null ? "" : v;
+  };
+}
+
+function selection_html(value) {
+  return arguments.length
+      ? this.each(value == null
+          ? htmlRemove : (typeof value === "function"
+          ? htmlFunction
+          : htmlConstant)(value))
+      : this.node().innerHTML;
+}
+
+function raise() {
+  if (this.nextSibling) this.parentNode.appendChild(this);
+}
+
+function selection_raise() {
+  return this.each(raise);
+}
+
+function lower() {
+  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+}
+
+function selection_lower() {
+  return this.each(lower);
+}
+
+function selection_append(name) {
+  var create = typeof name === "function" ? name : creator(name);
+  return this.select(function() {
+    return this.appendChild(create.apply(this, arguments));
+  });
+}
+
+function constantNull() {
+  return null;
+}
+
+function selection_insert(name, before) {
+  var create = typeof name === "function" ? name : creator(name),
+      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+  return this.select(function() {
+    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+  });
+}
+
+function remove() {
+  var parent = this.parentNode;
+  if (parent) parent.removeChild(this);
+}
+
+function selection_remove() {
+  return this.each(remove);
+}
+
+function selection_cloneShallow() {
+  return this.parentNode.insertBefore(this.cloneNode(false), this.nextSibling);
+}
+
+function selection_cloneDeep() {
+  return this.parentNode.insertBefore(this.cloneNode(true), this.nextSibling);
+}
+
+function selection_clone(deep) {
+  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+}
+
+function selection_datum(value) {
+  return arguments.length
+      ? this.property("__data__", value)
+      : this.node().__data__;
+}
+
+var filterEvents = {};
+
+exports.event = null;
+
+if (typeof document !== "undefined") {
+  var element$1 = document.documentElement;
+  if (!("onmouseenter" in element$1)) {
+    filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
+  }
+}
+
+function filterContextListener(listener, index, group) {
+  listener = contextListener(listener, index, group);
+  return function(event) {
+    var related = event.relatedTarget;
+    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
+      listener.call(this, event);
+    }
+  };
+}
+
+function contextListener(listener, index, group) {
+  return function(event1) {
+    var event0 = exports.event; // Events can be reentrant (e.g., focus).
+    exports.event = event1;
+    try {
+      listener.call(this, this.__data__, index, group);
+    } finally {
+      exports.event = event0;
+    }
+  };
+}
+
+function parseTypenames$1(typenames) {
+  return typenames.trim().split(/^|\s+/).map(function(t) {
+    var name = "", i = t.indexOf(".");
+    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+    return {type: t, name: name};
+  });
+}
+
+function onRemove(typename) {
+  return function() {
+    var on = this.__on;
+    if (!on) return;
+    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+        this.removeEventListener(o.type, o.listener, o.capture);
+      } else {
+        on[++i] = o;
+      }
+    }
+    if (++i) on.length = i;
+    else delete this.__on;
+  };
+}
+
+function onAdd(typename, value, capture) {
+  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
+  return function(d, i, group) {
+    var on = this.__on, o, listener = wrap(value, i, group);
+    if (on) for (var j = 0, m = on.length; j < m; ++j) {
+      if ((o = on[j]).type === typename.type && o.name === typename.name) {
+        this.removeEventListener(o.type, o.listener, o.capture);
+        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
+        o.value = value;
+        return;
+      }
+    }
+    this.addEventListener(typename.type, listener, capture);
+    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
+    if (!on) this.__on = [o];
+    else on.push(o);
+  };
+}
+
+function selection_on(typename, value, capture) {
+  var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;
+
+  if (arguments.length < 2) {
+    var on = this.node().__on;
+    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+      for (i = 0, o = on[j]; i < n; ++i) {
+        if ((t = typenames[i]).type === o.type && t.name === o.name) {
+          return o.value;
+        }
+      }
+    }
+    return;
+  }
+
+  on = value ? onAdd : onRemove;
+  if (capture == null) capture = false;
+  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
+  return this;
+}
+
+function customEvent(event1, listener, that, args) {
+  var event0 = exports.event;
+  event1.sourceEvent = exports.event;
+  exports.event = event1;
+  try {
+    return listener.apply(that, args);
+  } finally {
+    exports.event = event0;
+  }
+}
+
+function dispatchEvent(node, type, params) {
+  var window = defaultView(node),
+      event = window.CustomEvent;
+
+  if (typeof event === "function") {
+    event = new event(type, params);
+  } else {
+    event = window.document.createEvent("Event");
+    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
+    else event.initEvent(type, false, false);
+  }
+
+  node.dispatchEvent(event);
+}
+
+function dispatchConstant(type, params) {
+  return function() {
+    return dispatchEvent(this, type, params);
+  };
+}
+
+function dispatchFunction(type, params) {
+  return function() {
+    return dispatchEvent(this, type, params.apply(this, arguments));
+  };
+}
+
+function selection_dispatch(type, params) {
+  return this.each((typeof params === "function"
+      ? dispatchFunction
+      : dispatchConstant)(type, params));
+}
+
+var root = [null];
+
+function Selection(groups, parents) {
+  this._groups = groups;
+  this._parents = parents;
+}
+
+function selection() {
+  return new Selection([[document.documentElement]], root);
+}
+
+Selection.prototype = selection.prototype = {
+  constructor: Selection,
+  select: selection_select,
+  selectAll: selection_selectAll,
+  filter: selection_filter,
+  data: selection_data,
+  enter: selection_enter,
+  exit: selection_exit,
+  merge: selection_merge,
+  order: selection_order,
+  sort: selection_sort,
+  call: selection_call,
+  nodes: selection_nodes,
+  node: selection_node,
+  size: selection_size,
+  empty: selection_empty,
+  each: selection_each,
+  attr: selection_attr,
+  style: selection_style,
+  property: selection_property,
+  classed: selection_classed,
+  text: selection_text,
+  html: selection_html,
+  raise: selection_raise,
+  lower: selection_lower,
+  append: selection_append,
+  insert: selection_insert,
+  remove: selection_remove,
+  clone: selection_clone,
+  datum: selection_datum,
+  on: selection_on,
+  dispatch: selection_dispatch
+};
+
+function select(selector) {
+  return typeof selector === "string"
+      ? new Selection([[document.querySelector(selector)]], [document.documentElement])
+      : new Selection([[selector]], root);
+}
+
+function create(name) {
+  return select(creator(name).call(document.documentElement));
+}
+
+var nextId = 0;
+
+function local() {
+  return new Local;
+}
+
+function Local() {
+  this._ = "@" + (++nextId).toString(36);
+}
+
+Local.prototype = local.prototype = {
+  constructor: Local,
+  get: function(node) {
+    var id = this._;
+    while (!(id in node)) if (!(node = node.parentNode)) return;
+    return node[id];
+  },
+  set: function(node, value) {
+    return node[this._] = value;
+  },
+  remove: function(node) {
+    return this._ in node && delete node[this._];
+  },
+  toString: function() {
+    return this._;
+  }
+};
+
+function sourceEvent() {
+  var current = exports.event, source;
+  while (source = current.sourceEvent) current = source;
+  return current;
+}
+
+function point(node, event) {
+  var svg = node.ownerSVGElement || node;
+
+  if (svg.createSVGPoint) {
+    var point = svg.createSVGPoint();
+    point.x = event.clientX, point.y = event.clientY;
+    point = point.matrixTransform(node.getScreenCTM().inverse());
+    return [point.x, point.y];
+  }
+
+  var rect = node.getBoundingClientRect();
+  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+}
+
+function mouse(node) {
+  var event = sourceEvent();
+  if (event.changedTouches) event = event.changedTouches[0];
+  return point(node, event);
+}
+
+function selectAll(selector) {
+  return typeof selector === "string"
+      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
+      : new Selection([selector == null ? [] : selector], root);
+}
+
+function touch(node, touches, identifier) {
+  if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;
+
+  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
+    if ((touch = touches[i]).identifier === identifier) {
+      return point(node, touch);
+    }
+  }
+
+  return null;
+}
+
+function touches(node, touches) {
+  if (touches == null) touches = sourceEvent().touches;
+
+  for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
+    points[i] = point(node, touches[i]);
+  }
+
+  return points;
+}
+
+function nopropagation() {
+  exports.event.stopImmediatePropagation();
+}
+
+function noevent() {
+  exports.event.preventDefault();
+  exports.event.stopImmediatePropagation();
+}
+
+function dragDisable(view) {
+  var root = view.document.documentElement,
+      selection$$1 = select(view).on("dragstart.drag", noevent, true);
+  if ("onselectstart" in root) {
+    selection$$1.on("selectstart.drag", noevent, true);
+  } else {
+    root.__noselect = root.style.MozUserSelect;
+    root.style.MozUserSelect = "none";
+  }
+}
+
+function yesdrag(view, noclick) {
+  var root = view.document.documentElement,
+      selection$$1 = select(view).on("dragstart.drag", null);
+  if (noclick) {
+    selection$$1.on("click.drag", noevent, true);
+    setTimeout(function() { selection$$1.on("click.drag", null); }, 0);
+  }
+  if ("onselectstart" in root) {
+    selection$$1.on("selectstart.drag", null);
+  } else {
+    root.style.MozUserSelect = root.__noselect;
+    delete root.__noselect;
+  }
+}
+
+function constant$2(x) {
+  return function() {
+    return x;
+  };
+}
+
+function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
+  this.target = target;
+  this.type = type;
+  this.subject = subject;
+  this.identifier = id;
+  this.active = active;
+  this.x = x;
+  this.y = y;
+  this.dx = dx;
+  this.dy = dy;
+  this._ = dispatch;
+}
+
+DragEvent.prototype.on = function() {
+  var value = this._.on.apply(this._, arguments);
+  return value === this._ ? this : value;
+};
+
+// Ignore right-click, since that should open the context menu.
+function defaultFilter() {
+  return !exports.event.button;
+}
+
+function defaultContainer() {
+  return this.parentNode;
+}
+
+function defaultSubject(d) {
+  return d == null ? {x: exports.event.x, y: exports.event.y} : d;
+}
+
+function defaultTouchable() {
+  return "ontouchstart" in this;
+}
+
+function drag() {
+  var filter = defaultFilter,
+      container = defaultContainer,
+      subject = defaultSubject,
+      touchable = defaultTouchable,
+      gestures = {},
+      listeners = dispatch("start", "drag", "end"),
+      active = 0,
+      mousedownx,
+      mousedowny,
+      mousemoving,
+      touchending,
+      clickDistance2 = 0;
+
+  function drag(selection$$1) {
+    selection$$1
+        .on("mousedown.drag", mousedowned)
+      .filter(touchable)
+        .on("touchstart.drag", touchstarted)
+        .on("touchmove.drag", touchmoved)
+        .on("touchend.drag touchcancel.drag", touchended)
+        .style("touch-action", "none")
+        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+  }
+
+  function mousedowned() {
+    if (touchending || !filter.apply(this, arguments)) return;
+    var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
+    if (!gesture) return;
+    select(exports.event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
+    dragDisable(exports.event.view);
+    nopropagation();
+    mousemoving = false;
+    mousedownx = exports.event.clientX;
+    mousedowny = exports.event.clientY;
+    gesture("start");
+  }
+
+  function mousemoved() {
+    noevent();
+    if (!mousemoving) {
+      var dx = exports.event.clientX - mousedownx, dy = exports.event.clientY - mousedowny;
+      mousemoving = dx * dx + dy * dy > clickDistance2;
+    }
+    gestures.mouse("drag");
+  }
+
+  function mouseupped() {
+    select(exports.event.view).on("mousemove.drag mouseup.drag", null);
+    yesdrag(exports.event.view, mousemoving);
+    noevent();
+    gestures.mouse("end");
+  }
+
+  function touchstarted() {
+    if (!filter.apply(this, arguments)) return;
+    var touches$$1 = exports.event.changedTouches,
+        c = container.apply(this, arguments),
+        n = touches$$1.length, i, gesture;
+
+    for (i = 0; i < n; ++i) {
+      if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) {
+        nopropagation();
+        gesture("start");
+      }
+    }
+  }
+
+  function touchmoved() {
+    var touches$$1 = exports.event.changedTouches,
+        n = touches$$1.length, i, gesture;
+
+    for (i = 0; i < n; ++i) {
+      if (gesture = gestures[touches$$1[i].identifier]) {
+        noevent();
+        gesture("drag");
+      }
+    }
+  }
+
+  function touchended() {
+    var touches$$1 = exports.event.changedTouches,
+        n = touches$$1.length, i, gesture;
+
+    if (touchending) clearTimeout(touchending);
+    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
+    for (i = 0; i < n; ++i) {
+      if (gesture = gestures[touches$$1[i].identifier]) {
+        nopropagation();
+        gesture("end");
+      }
+    }
+  }
+
+  function beforestart(id, container, point$$1, that, args) {
+    var p = point$$1(container, id), s, dx, dy,
+        sublisteners = listeners.copy();
+
+    if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
+      if ((exports.event.subject = s = subject.apply(that, args)) == null) return false;
+      dx = s.x - p[0] || 0;
+      dy = s.y - p[1] || 0;
+      return true;
+    })) return;
+
+    return function gesture(type) {
+      var p0 = p, n;
+      switch (type) {
+        case "start": gestures[id] = gesture, n = active++; break;
+        case "end": delete gestures[id], --active; // nobreak
+        case "drag": p = point$$1(container, id), n = active; break;
+      }
+      customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
+    };
+  }
+
+  drag.filter = function(_) {
+    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
+  };
+
+  drag.container = function(_) {
+    return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
+  };
+
+  drag.subject = function(_) {
+    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
+  };
+
+  drag.touchable = function(_) {
+    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
+  };
+
+  drag.on = function() {
+    var value = listeners.on.apply(listeners, arguments);
+    return value === listeners ? drag : value;
+  };
+
+  drag.clickDistance = function(_) {
+    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+  };
+
+  return drag;
+}
+
+function define(constructor, factory, prototype) {
+  constructor.prototype = factory.prototype = prototype;
+  prototype.constructor = constructor;
+}
+
+function extend(parent, definition) {
+  var prototype = Object.create(parent.prototype);
+  for (var key in definition) prototype[key] = definition[key];
+  return prototype;
+}
+
+function Color() {}
+
+var darker = 0.7;
+var brighter = 1 / darker;
+
+var reI = "\\s*([+-]?\\d+)\\s*",
+    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
+    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
+    reHex3 = /^#([0-9a-f]{3})$/,
+    reHex6 = /^#([0-9a-f]{6})$/,
+    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
+    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
+    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
+    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
+    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
+    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+
+var named = {
+  aliceblue: 0xf0f8ff,
+  antiquewhite: 0xfaebd7,
+  aqua: 0x00ffff,
+  aquamarine: 0x7fffd4,
+  azure: 0xf0ffff,
+  beige: 0xf5f5dc,
+  bisque: 0xffe4c4,
+  black: 0x000000,
+  blanchedalmond: 0xffebcd,
+  blue: 0x0000ff,
+  blueviolet: 0x8a2be2,
+  brown: 0xa52a2a,
+  burlywood: 0xdeb887,
+  cadetblue: 0x5f9ea0,
+  chartreuse: 0x7fff00,
+  chocolate: 0xd2691e,
+  coral: 0xff7f50,
+  cornflowerblue: 0x6495ed,
+  cornsilk: 0xfff8dc,
+  crimson: 0xdc143c,
+  cyan: 0x00ffff,
+  darkblue: 0x00008b,
+  darkcyan: 0x008b8b,
+  darkgoldenrod: 0xb8860b,
+  darkgray: 0xa9a9a9,
+  darkgreen: 0x006400,
+  darkgrey: 0xa9a9a9,
+  darkkhaki: 0xbdb76b,
+  darkmagenta: 0x8b008b,
+  darkolivegreen: 0x556b2f,
+  darkorange: 0xff8c00,
+  darkorchid: 0x9932cc,
+  darkred: 0x8b0000,
+  darksalmon: 0xe9967a,
+  darkseagreen: 0x8fbc8f,
+  darkslateblue: 0x483d8b,
+  darkslategray: 0x2f4f4f,
+  darkslategrey: 0x2f4f4f,
+  darkturquoise: 0x00ced1,
+  darkviolet: 0x9400d3,
+  deeppink: 0xff1493,
+  deepskyblue: 0x00bfff,
+  dimgray: 0x696969,
+  dimgrey: 0x696969,
+  dodgerblue: 0x1e90ff,
+  firebrick: 0xb22222,
+  floralwhite: 0xfffaf0,
+  forestgreen: 0x228b22,
+  fuchsia: 0xff00ff,
+  gainsboro: 0xdcdcdc,
+  ghostwhite: 0xf8f8ff,
+  gold: 0xffd700,
+  goldenrod: 0xdaa520,
+  gray: 0x808080,
+  green: 0x008000,
+  greenyellow: 0xadff2f,
+  grey: 0x808080,
+  honeydew: 0xf0fff0,
+  hotpink: 0xff69b4,
+  indianred: 0xcd5c5c,
+  indigo: 0x4b0082,
+  ivory: 0xfffff0,
+  khaki: 0xf0e68c,
+  lavender: 0xe6e6fa,
+  lavenderblush: 0xfff0f5,
+  lawngreen: 0x7cfc00,
+  lemonchiffon: 0xfffacd,
+  lightblue: 0xadd8e6,
+  lightcoral: 0xf08080,
+  lightcyan: 0xe0ffff,
+  lightgoldenrodyellow: 0xfafad2,
+  lightgray: 0xd3d3d3,
+  lightgreen: 0x90ee90,
+  lightgrey: 0xd3d3d3,
+  lightpink: 0xffb6c1,
+  lightsalmon: 0xffa07a,
+  lightseagreen: 0x20b2aa,
+  lightskyblue: 0x87cefa,
+  lightslategray: 0x778899,
+  lightslategrey: 0x778899,
+  lightsteelblue: 0xb0c4de,
+  lightyellow: 0xffffe0,
+  lime: 0x00ff00,
+  limegreen: 0x32cd32,
+  linen: 0xfaf0e6,
+  magenta: 0xff00ff,
+  maroon: 0x800000,
+  mediumaquamarine: 0x66cdaa,
+  mediumblue: 0x0000cd,
+  mediumorchid: 0xba55d3,
+  mediumpurple: 0x9370db,
+  mediumseagreen: 0x3cb371,
+  mediumslateblue: 0x7b68ee,
+  mediumspringgreen: 0x00fa9a,
+  mediumturquoise: 0x48d1cc,
+  mediumvioletred: 0xc71585,
+  midnightblue: 0x191970,
+  mintcream: 0xf5fffa,
+  mistyrose: 0xffe4e1,
+  moccasin: 0xffe4b5,
+  navajowhite: 0xffdead,
+  navy: 0x000080,
+  oldlace: 0xfdf5e6,
+  olive: 0x808000,
+  olivedrab: 0x6b8e23,
+  orange: 0xffa500,
+  orangered: 0xff4500,
+  orchid: 0xda70d6,
+  palegoldenrod: 0xeee8aa,
+  palegreen: 0x98fb98,
+  paleturquoise: 0xafeeee,
+  palevioletred: 0xdb7093,
+  papayawhip: 0xffefd5,
+  peachpuff: 0xffdab9,
+  peru: 0xcd853f,
+  pink: 0xffc0cb,
+  plum: 0xdda0dd,
+  powderblue: 0xb0e0e6,
+  purple: 0x800080,
+  rebeccapurple: 0x663399,
+  red: 0xff0000,
+  rosybrown: 0xbc8f8f,
+  royalblue: 0x4169e1,
+  saddlebrown: 0x8b4513,
+  salmon: 0xfa8072,
+  sandybrown: 0xf4a460,
+  seagreen: 0x2e8b57,
+  seashell: 0xfff5ee,
+  sienna: 0xa0522d,
+  silver: 0xc0c0c0,
+  skyblue: 0x87ceeb,
+  slateblue: 0x6a5acd,
+  slategray: 0x708090,
+  slategrey: 0x708090,
+  snow: 0xfffafa,
+  springgreen: 0x00ff7f,
+  steelblue: 0x4682b4,
+  tan: 0xd2b48c,
+  teal: 0x008080,
+  thistle: 0xd8bfd8,
+  tomato: 0xff6347,
+  turquoise: 0x40e0d0,
+  violet: 0xee82ee,
+  wheat: 0xf5deb3,
+  white: 0xffffff,
+  whitesmoke: 0xf5f5f5,
+  yellow: 0xffff00,
+  yellowgreen: 0x9acd32
+};
+
+define(Color, color, {
+  displayable: function() {
+    return this.rgb().displayable();
+  },
+  hex: function() {
+    return this.rgb().hex();
+  },
+  toString: function() {
+    return this.rgb() + "";
+  }
+});
+
+function color(format) {
+  var m;
+  format = (format + "").trim().toLowerCase();
+  return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
+      : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
+      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
+      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
+      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
+      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
+      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
+      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
+      : named.hasOwnProperty(format) ? rgbn(named[format])
+      : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
+      : null;
+}
+
+function rgbn(n) {
+  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+}
+
+function rgba(r, g, b, a) {
+  if (a <= 0) r = g = b = NaN;
+  return new Rgb(r, g, b, a);
+}
+
+function rgbConvert(o) {
+  if (!(o instanceof Color)) o = color(o);
+  if (!o) return new Rgb;
+  o = o.rgb();
+  return new Rgb(o.r, o.g, o.b, o.opacity);
+}
+
+function rgb(r, g, b, opacity) {
+  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+}
+
+function Rgb(r, g, b, opacity) {
+  this.r = +r;
+  this.g = +g;
+  this.b = +b;
+  this.opacity = +opacity;
+}
+
+define(Rgb, rgb, extend(Color, {
+  brighter: function(k) {
+    k = k == null ? brighter : Math.pow(brighter, k);
+    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+  },
+  darker: function(k) {
+    k = k == null ? darker : Math.pow(darker, k);
+    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+  },
+  rgb: function() {
+    return this;
+  },
+  displayable: function() {
+    return (0 <= this.r && this.r <= 255)
+        && (0 <= this.g && this.g <= 255)
+        && (0 <= this.b && this.b <= 255)
+        && (0 <= this.opacity && this.opacity <= 1);
+  },
+  hex: function() {
+    return "#" + hex(this.r) + hex(this.g) + hex(this.b);
+  },
+  toString: function() {
+    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+    return (a === 1 ? "rgb(" : "rgba(")
+        + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
+        + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
+        + Math.max(0, Math.min(255, Math.round(this.b) || 0))
+        + (a === 1 ? ")" : ", " + a + ")");
+  }
+}));
+
+function hex(value) {
+  value = Math.max(0, Math.min(255, Math.round(value) || 0));
+  return (value < 16 ? "0" : "") + value.toString(16);
+}
+
+function hsla(h, s, l, a) {
+  if (a <= 0) h = s = l = NaN;
+  else if (l <= 0 || l >= 1) h = s = NaN;
+  else if (s <= 0) h = NaN;
+  return new Hsl(h, s, l, a);
+}
+
+function hslConvert(o) {
+  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
+  if (!(o instanceof Color)) o = color(o);
+  if (!o) return new Hsl;
+  if (o instanceof Hsl) return o;
+  o = o.rgb();
+  var r = o.r / 255,
+      g = o.g / 255,
+      b = o.b / 255,
+      min = Math.min(r, g, b),
+      max = Math.max(r, g, b),
+      h = NaN,
+      s = max - min,
+      l = (max + min) / 2;
+  if (s) {
+    if (r === max) h = (g - b) / s + (g < b) * 6;
+    else if (g === max) h = (b - r) / s + 2;
+    else h = (r - g) / s + 4;
+    s /= l < 0.5 ? max + min : 2 - max - min;
+    h *= 60;
+  } else {
+    s = l > 0 && l < 1 ? 0 : h;
+  }
+  return new Hsl(h, s, l, o.opacity);
+}
+
+function hsl(h, s, l, opacity) {
+  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+}
+
+function Hsl(h, s, l, opacity) {
+  this.h = +h;
+  this.s = +s;
+  this.l = +l;
+  this.opacity = +opacity;
+}
+
+define(Hsl, hsl, extend(Color, {
+  brighter: function(k) {
+    k = k == null ? brighter : Math.pow(brighter, k);
+    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+  },
+  darker: function(k) {
+    k = k == null ? darker : Math.pow(darker, k);
+    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+  },
+  rgb: function() {
+    var h = this.h % 360 + (this.h < 0) * 360,
+        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
+        l = this.l,
+        m2 = l + (l < 0.5 ? l : 1 - l) * s,
+        m1 = 2 * l - m2;
+    return new Rgb(
+      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
+      hsl2rgb(h, m1, m2),
+      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
+      this.opacity
+    );
+  },
+  displayable: function() {
+    return (0 <= this.s && this.s <= 1 || isNaN(this.s))
+        && (0 <= this.l && this.l <= 1)
+        && (0 <= this.opacity && this.opacity <= 1);
+  }
+}));
+
+/* From FvD 13.37, CSS Color Module Level 3 */
+function hsl2rgb(h, m1, m2) {
+  return (h < 60 ? m1 + (m2 - m1) * h / 60
+      : h < 180 ? m2
+      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
+      : m1) * 255;
+}
+
+var deg2rad = Math.PI / 180;
+var rad2deg = 180 / Math.PI;
+
+// https://beta.observablehq.com/@mbostock/lab-and-rgb
+var K = 18,
+    Xn = 0.96422,
+    Yn = 1,
+    Zn = 0.82521,
+    t0 = 4 / 29,
+    t1 = 6 / 29,
+    t2 = 3 * t1 * t1,
+    t3 = t1 * t1 * t1;
+
+function labConvert(o) {
+  if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
+  if (o instanceof Hcl) {
+    if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);
+    var h = o.h * deg2rad;
+    return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
+  }
+  if (!(o instanceof Rgb)) o = rgbConvert(o);
+  var r = rgb2lrgb(o.r),
+      g = rgb2lrgb(o.g),
+      b = rgb2lrgb(o.b),
+      y = xyz2lab((0.2225045 * r + 0.7168786 * g + 0.0606169 * b) / Yn), x, z;
+  if (r === g && g === b) x = z = y; else {
+    x = xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / Xn);
+    z = xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / Zn);
+  }
+  return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
+}
+
+function gray(l, opacity) {
+  return new Lab(l, 0, 0, opacity == null ? 1 : opacity);
+}
+
+function lab(l, a, b, opacity) {
+  return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
+}
+
+function Lab(l, a, b, opacity) {
+  this.l = +l;
+  this.a = +a;
+  this.b = +b;
+  this.opacity = +opacity;
+}
+
+define(Lab, lab, extend(Color, {
+  brighter: function(k) {
+    return new Lab(this.l + K * (k == null ? 1 : k), this.a, this.b, this.opacity);
+  },
+  darker: function(k) {
+    return new Lab(this.l - K * (k == null ? 1 : k), this.a, this.b, this.opacity);
+  },
+  rgb: function() {
+    var y = (this.l + 16) / 116,
+        x = isNaN(this.a) ? y : y + this.a / 500,
+        z = isNaN(this.b) ? y : y - this.b / 200;
+    x = Xn * lab2xyz(x);
+    y = Yn * lab2xyz(y);
+    z = Zn * lab2xyz(z);
+    return new Rgb(
+      lrgb2rgb( 3.1338561 * x - 1.6168667 * y - 0.4906146 * z),
+      lrgb2rgb(-0.9787684 * x + 1.9161415 * y + 0.0334540 * z),
+      lrgb2rgb( 0.0719453 * x - 0.2289914 * y + 1.4052427 * z),
+      this.opacity
+    );
+  }
+}));
+
+function xyz2lab(t) {
+  return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
+}
+
+function lab2xyz(t) {
+  return t > t1 ? t * t * t : t2 * (t - t0);
+}
+
+function lrgb2rgb(x) {
+  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
+}
+
+function rgb2lrgb(x) {
+  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
+}
+
+function hclConvert(o) {
+  if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
+  if (!(o instanceof Lab)) o = labConvert(o);
+  if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0, o.l, o.opacity);
+  var h = Math.atan2(o.b, o.a) * rad2deg;
+  return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
+}
+
+function lch(l, c, h, opacity) {
+  return arguments.length === 1 ? hclConvert(l) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
+}
+
+function hcl(h, c, l, opacity) {
+  return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
+}
+
+function Hcl(h, c, l, opacity) {
+  this.h = +h;
+  this.c = +c;
+  this.l = +l;
+  this.opacity = +opacity;
+}
+
+define(Hcl, hcl, extend(Color, {
+  brighter: function(k) {
+    return new Hcl(this.h, this.c, this.l + K * (k == null ? 1 : k), this.opacity);
+  },
+  darker: function(k) {
+    return new Hcl(this.h, this.c, this.l - K * (k == null ? 1 : k), this.opacity);
+  },
+  rgb: function() {
+    return labConvert(this).rgb();
+  }
+}));
+
+var A = -0.14861,
+    B = +1.78277,
+    C = -0.29227,
+    D = -0.90649,
+    E = +1.97294,
+    ED = E * D,
+    EB = E * B,
+    BC_DA = B * C - D * A;
+
+function cubehelixConvert(o) {
+  if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
+  if (!(o instanceof Rgb)) o = rgbConvert(o);
+  var r = o.r / 255,
+      g = o.g / 255,
+      b = o.b / 255,
+      l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
+      bl = b - l,
+      k = (E * (g - l) - C * bl) / D,
+      s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
+      h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
+  return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
+}
+
+function cubehelix(h, s, l, opacity) {
+  return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
+}
+
+function Cubehelix(h, s, l, opacity) {
+  this.h = +h;
+  this.s = +s;
+  this.l = +l;
+  this.opacity = +opacity;
+}
+
+define(Cubehelix, cubehelix, extend(Color, {
+  brighter: function(k) {
+    k = k == null ? brighter : Math.pow(brighter, k);
+    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
+  },
+  darker: function(k) {
+    k = k == null ? darker : Math.pow(darker, k);
+    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
+  },
+  rgb: function() {
+    var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
+        l = +this.l,
+        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
+        cosh = Math.cos(h),
+        sinh = Math.sin(h);
+    return new Rgb(
+      255 * (l + a * (A * cosh + B * sinh)),
+      255 * (l + a * (C * cosh + D * sinh)),
+      255 * (l + a * (E * cosh)),
+      this.opacity
+    );
+  }
+}));
+
+function basis(t1, v0, v1, v2, v3) {
+  var t2 = t1 * t1, t3 = t2 * t1;
+  return ((1 - 3 * t1 + 3 * t2 - t3) * v0
+      + (4 - 6 * t2 + 3 * t3) * v1
+      + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2
+      + t3 * v3) / 6;
+}
+
+function basis$1(values) {
+  var n = values.length - 1;
+  return function(t) {
+    var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
+        v1 = values[i],
+        v2 = values[i + 1],
+        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
+        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
+    return basis((t - i / n) * n, v0, v1, v2, v3);
+  };
+}
+
+function basisClosed(values) {
+  var n = values.length;
+  return function(t) {
+    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
+        v0 = values[(i + n - 1) % n],
+        v1 = values[i % n],
+        v2 = values[(i + 1) % n],
+        v3 = values[(i + 2) % n];
+    return basis((t - i / n) * n, v0, v1, v2, v3);
+  };
+}
+
+function constant$3(x) {
+  return function() {
+    return x;
+  };
+}
+
+function linear(a, d) {
+  return function(t) {
+    return a + t * d;
+  };
+}
+
+function exponential(a, b, y) {
+  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
+    return Math.pow(a + t * b, y);
+  };
+}
+
+function hue(a, b) {
+  var d = b - a;
+  return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a);
+}
+
+function gamma(y) {
+  return (y = +y) === 1 ? nogamma : function(a, b) {
+    return b - a ? exponential(a, b, y) : constant$3(isNaN(a) ? b : a);
+  };
+}
+
+function nogamma(a, b) {
+  var d = b - a;
+  return d ? linear(a, d) : constant$3(isNaN(a) ? b : a);
+}
+
+var interpolateRgb = (function rgbGamma(y) {
+  var color$$1 = gamma(y);
+
+  function rgb$$1(start, end) {
+    var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),
+        g = color$$1(start.g, end.g),
+        b = color$$1(start.b, end.b),
+        opacity = nogamma(start.opacity, end.opacity);
+    return function(t) {
+      start.r = r(t);
+      start.g = g(t);
+      start.b = b(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+
+  rgb$$1.gamma = rgbGamma;
+
+  return rgb$$1;
+})(1);
+
+function rgbSpline(spline) {
+  return function(colors) {
+    var n = colors.length,
+        r = new Array(n),
+        g = new Array(n),
+        b = new Array(n),
+        i, color$$1;
+    for (i = 0; i < n; ++i) {
+      color$$1 = rgb(colors[i]);
+      r[i] = color$$1.r || 0;
+      g[i] = color$$1.g || 0;
+      b[i] = color$$1.b || 0;
+    }
+    r = spline(r);
+    g = spline(g);
+    b = spline(b);
+    color$$1.opacity = 1;
+    return function(t) {
+      color$$1.r = r(t);
+      color$$1.g = g(t);
+      color$$1.b = b(t);
+      return color$$1 + "";
+    };
+  };
+}
+
+var rgbBasis = rgbSpline(basis$1);
+var rgbBasisClosed = rgbSpline(basisClosed);
+
+function array$1(a, b) {
+  var nb = b ? b.length : 0,
+      na = a ? Math.min(nb, a.length) : 0,
+      x = new Array(na),
+      c = new Array(nb),
+      i;
+
+  for (i = 0; i < na; ++i) x[i] = interpolateValue(a[i], b[i]);
+  for (; i < nb; ++i) c[i] = b[i];
+
+  return function(t) {
+    for (i = 0; i < na; ++i) c[i] = x[i](t);
+    return c;
+  };
+}
+
+function date(a, b) {
+  var d = new Date;
+  return a = +a, b -= a, function(t) {
+    return d.setTime(a + b * t), d;
+  };
+}
+
+function reinterpolate(a, b) {
+  return a = +a, b -= a, function(t) {
+    return a + b * t;
+  };
+}
+
+function object(a, b) {
+  var i = {},
+      c = {},
+      k;
+
+  if (a === null || typeof a !== "object") a = {};
+  if (b === null || typeof b !== "object") b = {};
+
+  for (k in b) {
+    if (k in a) {
+      i[k] = interpolateValue(a[k], b[k]);
+    } else {
+      c[k] = b[k];
+    }
+  }
+
+  return function(t) {
+    for (k in i) c[k] = i[k](t);
+    return c;
+  };
+}
+
+var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+    reB = new RegExp(reA.source, "g");
+
+function zero(b) {
+  return function() {
+    return b;
+  };
+}
+
+function one(b) {
+  return function(t) {
+    return b(t) + "";
+  };
+}
+
+function interpolateString(a, b) {
+  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
+      am, // current match in a
+      bm, // current match in b
+      bs, // string preceding current number in b, if any
+      i = -1, // index in s
+      s = [], // string constants and placeholders
+      q = []; // number interpolators
+
+  // Coerce inputs to strings.
+  a = a + "", b = b + "";
+
+  // Interpolate pairs of numbers in a & b.
+  while ((am = reA.exec(a))
+      && (bm = reB.exec(b))) {
+    if ((bs = bm.index) > bi) { // a string precedes the next number in b
+      bs = b.slice(bi, bs);
+      if (s[i]) s[i] += bs; // coalesce with previous string
+      else s[++i] = bs;
+    }
+    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
+      if (s[i]) s[i] += bm; // coalesce with previous string
+      else s[++i] = bm;
+    } else { // interpolate non-matching numbers
+      s[++i] = null;
+      q.push({i: i, x: reinterpolate(am, bm)});
+    }
+    bi = reB.lastIndex;
+  }
+
+  // Add remains of b.
+  if (bi < b.length) {
+    bs = b.slice(bi);
+    if (s[i]) s[i] += bs; // coalesce with previous string
+    else s[++i] = bs;
+  }
+
+  // Special optimization for only a single match.
+  // Otherwise, interpolate each of the numbers and rejoin the string.
+  return s.length < 2 ? (q[0]
+      ? one(q[0].x)
+      : zero(b))
+      : (b = q.length, function(t) {
+          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
+          return s.join("");
+        });
+}
+
+function interpolateValue(a, b) {
+  var t = typeof b, c;
+  return b == null || t === "boolean" ? constant$3(b)
+      : (t === "number" ? reinterpolate
+      : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)
+      : b instanceof color ? interpolateRgb
+      : b instanceof Date ? date
+      : Array.isArray(b) ? array$1
+      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
+      : reinterpolate)(a, b);
+}
+
+function interpolateRound(a, b) {
+  return a = +a, b -= a, function(t) {
+    return Math.round(a + b * t);
+  };
+}
+
+var degrees = 180 / Math.PI;
+
+var identity$2 = {
+  translateX: 0,
+  translateY: 0,
+  rotate: 0,
+  skewX: 0,
+  scaleX: 1,
+  scaleY: 1
+};
+
+function decompose(a, b, c, d, e, f) {
+  var scaleX, scaleY, skewX;
+  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+  return {
+    translateX: e,
+    translateY: f,
+    rotate: Math.atan2(b, a) * degrees,
+    skewX: Math.atan(skewX) * degrees,
+    scaleX: scaleX,
+    scaleY: scaleY
+  };
+}
+
+var cssNode,
+    cssRoot,
+    cssView,
+    svgNode;
+
+function parseCss(value) {
+  if (value === "none") return identity$2;
+  if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
+  cssNode.style.transform = value;
+  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
+  cssRoot.removeChild(cssNode);
+  value = value.slice(7, -1).split(",");
+  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
+}
+
+function parseSvg(value) {
+  if (value == null) return identity$2;
+  if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+  svgNode.setAttribute("transform", value);
+  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;
+  value = value.matrix;
+  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+}
+
+function interpolateTransform(parse, pxComma, pxParen, degParen) {
+
+  function pop(s) {
+    return s.length ? s.pop() + " " : "";
+  }
+
+  function translate(xa, ya, xb, yb, s, q) {
+    if (xa !== xb || ya !== yb) {
+      var i = s.push("translate(", null, pxComma, null, pxParen);
+      q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});
+    } else if (xb || yb) {
+      s.push("translate(" + xb + pxComma + yb + pxParen);
+    }
+  }
+
+  function rotate(a, b, s, q) {
+    if (a !== b) {
+      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
+      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: reinterpolate(a, b)});
+    } else if (b) {
+      s.push(pop(s) + "rotate(" + b + degParen);
+    }
+  }
+
+  function skewX(a, b, s, q) {
+    if (a !== b) {
+      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: reinterpolate(a, b)});
+    } else if (b) {
+      s.push(pop(s) + "skewX(" + b + degParen);
+    }
+  }
+
+  function scale(xa, ya, xb, yb, s, q) {
+    if (xa !== xb || ya !== yb) {
+      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+      q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});
+    } else if (xb !== 1 || yb !== 1) {
+      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+    }
+  }
+
+  return function(a, b) {
+    var s = [], // string constants and placeholders
+        q = []; // number interpolators
+    a = parse(a), b = parse(b);
+    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+    rotate(a.rotate, b.rotate, s, q);
+    skewX(a.skewX, b.skewX, s, q);
+    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+    a = b = null; // gc
+    return function(t) {
+      var i = -1, n = q.length, o;
+      while (++i < n) s[(o = q[i]).i] = o.x(t);
+      return s.join("");
+    };
+  };
+}
+
+var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
+
+var rho = Math.SQRT2,
+    rho2 = 2,
+    rho4 = 4,
+    epsilon2 = 1e-12;
+
+function cosh(x) {
+  return ((x = Math.exp(x)) + 1 / x) / 2;
+}
+
+function sinh(x) {
+  return ((x = Math.exp(x)) - 1 / x) / 2;
+}
+
+function tanh(x) {
+  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+}
+
+// p0 = [ux0, uy0, w0]
+// p1 = [ux1, uy1, w1]
+function interpolateZoom(p0, p1) {
+  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
+      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
+      dx = ux1 - ux0,
+      dy = uy1 - uy0,
+      d2 = dx * dx + dy * dy,
+      i,
+      S;
+
+  // Special case for u0 ≅ u1.
+  if (d2 < epsilon2) {
+    S = Math.log(w1 / w0) / rho;
+    i = function(t) {
+      return [
+        ux0 + t * dx,
+        uy0 + t * dy,
+        w0 * Math.exp(rho * t * S)
+      ];
+    };
+  }
+
+  // General case.
+  else {
+    var d1 = Math.sqrt(d2),
+        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+    S = (r1 - r0) / rho;
+    i = function(t) {
+      var s = t * S,
+          coshr0 = cosh(r0),
+          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+      return [
+        ux0 + u * dx,
+        uy0 + u * dy,
+        w0 * coshr0 / cosh(rho * s + r0)
+      ];
+    };
+  }
+
+  i.duration = S * 1000;
+
+  return i;
+}
+
+function hsl$1(hue$$1) {
+  return function(start, end) {
+    var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h),
+        s = nogamma(start.s, end.s),
+        l = nogamma(start.l, end.l),
+        opacity = nogamma(start.opacity, end.opacity);
+    return function(t) {
+      start.h = h(t);
+      start.s = s(t);
+      start.l = l(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+}
+
+var hsl$2 = hsl$1(hue);
+var hslLong = hsl$1(nogamma);
+
+function lab$1(start, end) {
+  var l = nogamma((start = lab(start)).l, (end = lab(end)).l),
+      a = nogamma(start.a, end.a),
+      b = nogamma(start.b, end.b),
+      opacity = nogamma(start.opacity, end.opacity);
+  return function(t) {
+    start.l = l(t);
+    start.a = a(t);
+    start.b = b(t);
+    start.opacity = opacity(t);
+    return start + "";
+  };
+}
+
+function hcl$1(hue$$1) {
+  return function(start, end) {
+    var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h),
+        c = nogamma(start.c, end.c),
+        l = nogamma(start.l, end.l),
+        opacity = nogamma(start.opacity, end.opacity);
+    return function(t) {
+      start.h = h(t);
+      start.c = c(t);
+      start.l = l(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+}
+
+var hcl$2 = hcl$1(hue);
+var hclLong = hcl$1(nogamma);
+
+function cubehelix$1(hue$$1) {
+  return (function cubehelixGamma(y) {
+    y = +y;
+
+    function cubehelix$$1(start, end) {
+      var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),
+          s = nogamma(start.s, end.s),
+          l = nogamma(start.l, end.l),
+          opacity = nogamma(start.opacity, end.opacity);
+      return function(t) {
+        start.h = h(t);
+        start.s = s(t);
+        start.l = l(Math.pow(t, y));
+        start.opacity = opacity(t);
+        return start + "";
+      };
+    }
+
+    cubehelix$$1.gamma = cubehelixGamma;
+
+    return cubehelix$$1;
+  })(1);
+}
+
+var cubehelix$2 = cubehelix$1(hue);
+var cubehelixLong = cubehelix$1(nogamma);
+
+function piecewise(interpolate, values) {
+  var i = 0, n = values.length - 1, v = values[0], I = new Array(n < 0 ? 0 : n);
+  while (i < n) I[i] = interpolate(v, v = values[++i]);
+  return function(t) {
+    var i = Math.max(0, Math.min(n - 1, Math.floor(t *= n)));
+    return I[i](t - i);
+  };
+}
+
+function quantize(interpolator, n) {
+  var samples = new Array(n);
+  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
+  return samples;
+}
+
+var frame = 0, // is an animation frame pending?
+    timeout = 0, // is a timeout pending?
+    interval = 0, // are any timers active?
+    pokeDelay = 1000, // how frequently we check for clock skew
+    taskHead,
+    taskTail,
+    clockLast = 0,
+    clockNow = 0,
+    clockSkew = 0,
+    clock = typeof performance === "object" && performance.now ? performance : Date,
+    setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
+
+function now() {
+  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+}
+
+function clearNow() {
+  clockNow = 0;
+}
+
+function Timer() {
+  this._call =
+  this._time =
+  this._next = null;
+}
+
+Timer.prototype = timer.prototype = {
+  constructor: Timer,
+  restart: function(callback, delay, time) {
+    if (typeof callback !== "function") throw new TypeError("callback is not a function");
+    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
+    if (!this._next && taskTail !== this) {
+      if (taskTail) taskTail._next = this;
+      else taskHead = this;
+      taskTail = this;
+    }
+    this._call = callback;
+    this._time = time;
+    sleep();
+  },
+  stop: function() {
+    if (this._call) {
+      this._call = null;
+      this._time = Infinity;
+      sleep();
+    }
+  }
+};
+
+function timer(callback, delay, time) {
+  var t = new Timer;
+  t.restart(callback, delay, time);
+  return t;
+}
+
+function timerFlush() {
+  now(); // Get the current time, if not already set.
+  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
+  var t = taskHead, e;
+  while (t) {
+    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+    t = t._next;
+  }
+  --frame;
+}
+
+function wake() {
+  clockNow = (clockLast = clock.now()) + clockSkew;
+  frame = timeout = 0;
+  try {
+    timerFlush();
+  } finally {
+    frame = 0;
+    nap();
+    clockNow = 0;
+  }
+}
+
+function poke() {
+  var now = clock.now(), delay = now - clockLast;
+  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+}
+
+function nap() {
+  var t0, t1 = taskHead, t2, time = Infinity;
+  while (t1) {
+    if (t1._call) {
+      if (time > t1._time) time = t1._time;
+      t0 = t1, t1 = t1._next;
+    } else {
+      t2 = t1._next, t1._next = null;
+      t1 = t0 ? t0._next = t2 : taskHead = t2;
+    }
+  }
+  taskTail = t0;
+  sleep(time);
+}
+
+function sleep(time) {
+  if (frame) return; // Soonest alarm already set, or will be.
+  if (timeout) timeout = clearTimeout(timeout);
+  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
+  if (delay > 24) {
+    if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
+    if (interval) interval = clearInterval(interval);
+  } else {
+    if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+    frame = 1, setFrame(wake);
+  }
+}
+
+function timeout$1(callback, delay, time) {
+  var t = new Timer;
+  delay = delay == null ? 0 : +delay;
+  t.restart(function(elapsed) {
+    t.stop();
+    callback(elapsed + delay);
+  }, delay, time);
+  return t;
+}
+
+function interval$1(callback, delay, time) {
+  var t = new Timer, total = delay;
+  if (delay == null) return t.restart(callback, delay, time), t;
+  delay = +delay, time = time == null ? now() : +time;
+  t.restart(function tick(elapsed) {
+    elapsed += total;
+    t.restart(tick, total += delay, time);
+    callback(elapsed);
+  }, delay, time);
+  return t;
+}
+
+var emptyOn = dispatch("start", "end", "interrupt");
+var emptyTween = [];
+
+var CREATED = 0;
+var SCHEDULED = 1;
+var STARTING = 2;
+var STARTED = 3;
+var RUNNING = 4;
+var ENDING = 5;
+var ENDED = 6;
+
+function schedule(node, name, id, index, group, timing) {
+  var schedules = node.__transition;
+  if (!schedules) node.__transition = {};
+  else if (id in schedules) return;
+  create$1(node, id, {
+    name: name,
+    index: index, // For context during callback.
+    group: group, // For context during callback.
+    on: emptyOn,
+    tween: emptyTween,
+    time: timing.time,
+    delay: timing.delay,
+    duration: timing.duration,
+    ease: timing.ease,
+    timer: null,
+    state: CREATED
+  });
+}
+
+function init(node, id) {
+  var schedule = get$1(node, id);
+  if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+  return schedule;
+}
+
+function set$1(node, id) {
+  var schedule = get$1(node, id);
+  if (schedule.state > STARTING) throw new Error("too late; already started");
+  return schedule;
+}
+
+function get$1(node, id) {
+  var schedule = node.__transition;
+  if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+  return schedule;
+}
+
+function create$1(node, id, self) {
+  var schedules = node.__transition,
+      tween;
+
+  // Initialize the self timer when the transition is created.
+  // Note the actual delay is not known until the first callback!
+  schedules[id] = self;
+  self.timer = timer(schedule, 0, self.time);
+
+  function schedule(elapsed) {
+    self.state = SCHEDULED;
+    self.timer.restart(start, self.delay, self.time);
+
+    // If the elapsed delay is less than our first sleep, start immediately.
+    if (self.delay <= elapsed) start(elapsed - self.delay);
+  }
+
+  function start(elapsed) {
+    var i, j, n, o;
+
+    // If the state is not SCHEDULED, then we previously errored on start.
+    if (self.state !== SCHEDULED) return stop();
+
+    for (i in schedules) {
+      o = schedules[i];
+      if (o.name !== self.name) continue;
+
+      // While this element already has a starting transition during this frame,
+      // defer starting an interrupting transition until that transition has a
+      // chance to tick (and possibly end); see d3/d3-transition#54!
+      if (o.state === STARTED) return timeout$1(start);
+
+      // Interrupt the active transition, if any.
+      // Dispatch the interrupt event.
+      if (o.state === RUNNING) {
+        o.state = ENDED;
+        o.timer.stop();
+        o.on.call("interrupt", node, node.__data__, o.index, o.group);
+        delete schedules[i];
+      }
+
+      // Cancel any pre-empted transitions. No interrupt event is dispatched
+      // because the cancelled transitions never started. Note that this also
+      // removes this transition from the pending list!
+      else if (+i < id) {
+        o.state = ENDED;
+        o.timer.stop();
+        delete schedules[i];
+      }
+    }
+
+    // Defer the first tick to end of the current frame; see d3/d3#1576.
+    // Note the transition may be canceled after start and before the first tick!
+    // Note this must be scheduled before the start event; see d3/d3-transition#16!
+    // Assuming this is successful, subsequent callbacks go straight to tick.
+    timeout$1(function() {
+      if (self.state === STARTED) {
+        self.state = RUNNING;
+        self.timer.restart(tick, self.delay, self.time);
+        tick(elapsed);
+      }
+    });
+
+    // Dispatch the start event.
+    // Note this must be done before the tween are initialized.
+    self.state = STARTING;
+    self.on.call("start", node, node.__data__, self.index, self.group);
+    if (self.state !== STARTING) return; // interrupted
+    self.state = STARTED;
+
+    // Initialize the tween, deleting null tween.
+    tween = new Array(n = self.tween.length);
+    for (i = 0, j = -1; i < n; ++i) {
+      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
+        tween[++j] = o;
+      }
+    }
+    tween.length = j + 1;
+  }
+
+  function tick(elapsed) {
+    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
+        i = -1,
+        n = tween.length;
+
+    while (++i < n) {
+      tween[i].call(null, t);
+    }
+
+    // Dispatch the end event.
+    if (self.state === ENDING) {
+      self.on.call("end", node, node.__data__, self.index, self.group);
+      stop();
+    }
+  }
+
+  function stop() {
+    self.state = ENDED;
+    self.timer.stop();
+    delete schedules[id];
+    for (var i in schedules) return; // eslint-disable-line no-unused-vars
+    delete node.__transition;
+  }
+}
+
+function interrupt(node, name) {
+  var schedules = node.__transition,
+      schedule$$1,
+      active,
+      empty = true,
+      i;
+
+  if (!schedules) return;
+
+  name = name == null ? null : name + "";
+
+  for (i in schedules) {
+    if ((schedule$$1 = schedules[i]).name !== name) { empty = false; continue; }
+    active = schedule$$1.state > STARTING && schedule$$1.state < ENDING;
+    schedule$$1.state = ENDED;
+    schedule$$1.timer.stop();
+    if (active) schedule$$1.on.call("interrupt", node, node.__data__, schedule$$1.index, schedule$$1.group);
+    delete schedules[i];
+  }
+
+  if (empty) delete node.__transition;
+}
+
+function selection_interrupt(name) {
+  return this.each(function() {
+    interrupt(this, name);
+  });
+}
+
+function tweenRemove(id, name) {
+  var tween0, tween1;
+  return function() {
+    var schedule$$1 = set$1(this, id),
+        tween = schedule$$1.tween;
+
+    // If this node shared tween with the previous node,
+    // just assign the updated shared tween and we’re done!
+    // Otherwise, copy-on-write.
+    if (tween !== tween0) {
+      tween1 = tween0 = tween;
+      for (var i = 0, n = tween1.length; i < n; ++i) {
+        if (tween1[i].name === name) {
+          tween1 = tween1.slice();
+          tween1.splice(i, 1);
+          break;
+        }
+      }
+    }
+
+    schedule$$1.tween = tween1;
+  };
+}
+
+function tweenFunction(id, name, value) {
+  var tween0, tween1;
+  if (typeof value !== "function") throw new Error;
+  return function() {
+    var schedule$$1 = set$1(this, id),
+        tween = schedule$$1.tween;
+
+    // If this node shared tween with the previous node,
+    // just assign the updated shared tween and we’re done!
+    // Otherwise, copy-on-write.
+    if (tween !== tween0) {
+      tween1 = (tween0 = tween).slice();
+      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
+        if (tween1[i].name === name) {
+          tween1[i] = t;
+          break;
+        }
+      }
+      if (i === n) tween1.push(t);
+    }
+
+    schedule$$1.tween = tween1;
+  };
+}
+
+function transition_tween(name, value) {
+  var id = this._id;
+
+  name += "";
+
+  if (arguments.length < 2) {
+    var tween = get$1(this.node(), id).tween;
+    for (var i = 0, n = tween.length, t; i < n; ++i) {
+      if ((t = tween[i]).name === name) {
+        return t.value;
+      }
+    }
+    return null;
+  }
+
+  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
+}
+
+function tweenValue(transition, name, value) {
+  var id = transition._id;
+
+  transition.each(function() {
+    var schedule$$1 = set$1(this, id);
+    (schedule$$1.value || (schedule$$1.value = {}))[name] = value.apply(this, arguments);
+  });
+
+  return function(node) {
+    return get$1(node, id).value[name];
+  };
+}
+
+function interpolate(a, b) {
+  var c;
+  return (typeof b === "number" ? reinterpolate
+      : b instanceof color ? interpolateRgb
+      : (c = color(b)) ? (b = c, interpolateRgb)
+      : interpolateString)(a, b);
+}
+
+function attrRemove$1(name) {
+  return function() {
+    this.removeAttribute(name);
+  };
+}
+
+function attrRemoveNS$1(fullname) {
+  return function() {
+    this.removeAttributeNS(fullname.space, fullname.local);
+  };
+}
+
+function attrConstant$1(name, interpolate$$1, value1) {
+  var value00,
+      interpolate0;
+  return function() {
+    var value0 = this.getAttribute(name);
+    return value0 === value1 ? null
+        : value0 === value00 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value1);
+  };
+}
+
+function attrConstantNS$1(fullname, interpolate$$1, value1) {
+  var value00,
+      interpolate0;
+  return function() {
+    var value0 = this.getAttributeNS(fullname.space, fullname.local);
+    return value0 === value1 ? null
+        : value0 === value00 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value1);
+  };
+}
+
+function attrFunction$1(name, interpolate$$1, value) {
+  var value00,
+      value10,
+      interpolate0;
+  return function() {
+    var value0, value1 = value(this);
+    if (value1 == null) return void this.removeAttribute(name);
+    value0 = this.getAttribute(name);
+    return value0 === value1 ? null
+        : value0 === value00 && value1 === value10 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
+  };
+}
+
+function attrFunctionNS$1(fullname, interpolate$$1, value) {
+  var value00,
+      value10,
+      interpolate0;
+  return function() {
+    var value0, value1 = value(this);
+    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
+    value0 = this.getAttributeNS(fullname.space, fullname.local);
+    return value0 === value1 ? null
+        : value0 === value00 && value1 === value10 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
+  };
+}
+
+function transition_attr(name, value) {
+  var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate;
+  return this.attrTween(name, typeof value === "function"
+      ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
+      : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
+      : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value + ""));
+}
+
+function attrTweenNS(fullname, value) {
+  function tween() {
+    var node = this, i = value.apply(node, arguments);
+    return i && function(t) {
+      node.setAttributeNS(fullname.space, fullname.local, i(t));
+    };
+  }
+  tween._value = value;
+  return tween;
+}
+
+function attrTween(name, value) {
+  function tween() {
+    var node = this, i = value.apply(node, arguments);
+    return i && function(t) {
+      node.setAttribute(name, i(t));
+    };
+  }
+  tween._value = value;
+  return tween;
+}
+
+function transition_attrTween(name, value) {
+  var key = "attr." + name;
+  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+  if (value == null) return this.tween(key, null);
+  if (typeof value !== "function") throw new Error;
+  var fullname = namespace(name);
+  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+}
+
+function delayFunction(id, value) {
+  return function() {
+    init(this, id).delay = +value.apply(this, arguments);
+  };
+}
+
+function delayConstant(id, value) {
+  return value = +value, function() {
+    init(this, id).delay = value;
+  };
+}
+
+function transition_delay(value) {
+  var id = this._id;
+
+  return arguments.length
+      ? this.each((typeof value === "function"
+          ? delayFunction
+          : delayConstant)(id, value))
+      : get$1(this.node(), id).delay;
+}
+
+function durationFunction(id, value) {
+  return function() {
+    set$1(this, id).duration = +value.apply(this, arguments);
+  };
+}
+
+function durationConstant(id, value) {
+  return value = +value, function() {
+    set$1(this, id).duration = value;
+  };
+}
+
+function transition_duration(value) {
+  var id = this._id;
+
+  return arguments.length
+      ? this.each((typeof value === "function"
+          ? durationFunction
+          : durationConstant)(id, value))
+      : get$1(this.node(), id).duration;
+}
+
+function easeConstant(id, value) {
+  if (typeof value !== "function") throw new Error;
+  return function() {
+    set$1(this, id).ease = value;
+  };
+}
+
+function transition_ease(value) {
+  var id = this._id;
+
+  return arguments.length
+      ? this.each(easeConstant(id, value))
+      : get$1(this.node(), id).ease;
+}
+
+function transition_filter(match) {
+  if (typeof match !== "function") match = matcher$1(match);
+
+  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+        subgroup.push(node);
+      }
+    }
+  }
+
+  return new Transition(subgroups, this._parents, this._name, this._id);
+}
+
+function transition_merge(transition$$1) {
+  if (transition$$1._id !== this._id) throw new Error;
+
+  for (var groups0 = this._groups, groups1 = transition$$1._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+      if (node = group0[i] || group1[i]) {
+        merge[i] = node;
+      }
+    }
+  }
+
+  for (; j < m0; ++j) {
+    merges[j] = groups0[j];
+  }
+
+  return new Transition(merges, this._parents, this._name, this._id);
+}
+
+function start(name) {
+  return (name + "").trim().split(/^|\s+/).every(function(t) {
+    var i = t.indexOf(".");
+    if (i >= 0) t = t.slice(0, i);
+    return !t || t === "start";
+  });
+}
+
+function onFunction(id, name, listener) {
+  var on0, on1, sit = start(name) ? init : set$1;
+  return function() {
+    var schedule$$1 = sit(this, id),
+        on = schedule$$1.on;
+
+    // If this node shared a dispatch with the previous node,
+    // just assign the updated shared dispatch and we’re done!
+    // Otherwise, copy-on-write.
+    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+
+    schedule$$1.on = on1;
+  };
+}
+
+function transition_on(name, listener) {
+  var id = this._id;
+
+  return arguments.length < 2
+      ? get$1(this.node(), id).on.on(name)
+      : this.each(onFunction(id, name, listener));
+}
+
+function removeFunction(id) {
+  return function() {
+    var parent = this.parentNode;
+    for (var i in this.__transition) if (+i !== id) return;
+    if (parent) parent.removeChild(this);
+  };
+}
+
+function transition_remove() {
+  return this.on("end.remove", removeFunction(this._id));
+}
+
+function transition_select(select$$1) {
+  var name = this._name,
+      id = this._id;
+
+  if (typeof select$$1 !== "function") select$$1 = selector(select$$1);
+
+  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+      if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) {
+        if ("__data__" in node) subnode.__data__ = node.__data__;
+        subgroup[i] = subnode;
+        schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
+      }
+    }
+  }
+
+  return new Transition(subgroups, this._parents, name, id);
+}
+
+function transition_selectAll(select$$1) {
+  var name = this._name,
+      id = this._id;
+
+  if (typeof select$$1 !== "function") select$$1 = selectorAll(select$$1);
+
+  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
+          if (child = children[k]) {
+            schedule(child, name, id, k, children, inherit);
+          }
+        }
+        subgroups.push(children);
+        parents.push(node);
+      }
+    }
+  }
+
+  return new Transition(subgroups, parents, name, id);
+}
+
+var Selection$1 = selection.prototype.constructor;
+
+function transition_selection() {
+  return new Selection$1(this._groups, this._parents);
+}
+
+function styleRemove$1(name, interpolate$$1) {
+  var value00,
+      value10,
+      interpolate0;
+  return function() {
+    var value0 = styleValue(this, name),
+        value1 = (this.style.removeProperty(name), styleValue(this, name));
+    return value0 === value1 ? null
+        : value0 === value00 && value1 === value10 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
+  };
+}
+
+function styleRemoveEnd(name) {
+  return function() {
+    this.style.removeProperty(name);
+  };
+}
+
+function styleConstant$1(name, interpolate$$1, value1) {
+  var value00,
+      interpolate0;
+  return function() {
+    var value0 = styleValue(this, name);
+    return value0 === value1 ? null
+        : value0 === value00 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value1);
+  };
+}
+
+function styleFunction$1(name, interpolate$$1, value) {
+  var value00,
+      value10,
+      interpolate0;
+  return function() {
+    var value0 = styleValue(this, name),
+        value1 = value(this);
+    if (value1 == null) value1 = (this.style.removeProperty(name), styleValue(this, name));
+    return value0 === value1 ? null
+        : value0 === value00 && value1 === value10 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
+  };
+}
+
+function transition_style(name, value, priority) {
+  var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
+  return value == null ? this
+          .styleTween(name, styleRemove$1(name, i))
+          .on("end.style." + name, styleRemoveEnd(name))
+      : this.styleTween(name, typeof value === "function"
+          ? styleFunction$1(name, i, tweenValue(this, "style." + name, value))
+          : styleConstant$1(name, i, value + ""), priority);
+}
+
+function styleTween(name, value, priority) {
+  function tween() {
+    var node = this, i = value.apply(node, arguments);
+    return i && function(t) {
+      node.style.setProperty(name, i(t), priority);
+    };
+  }
+  tween._value = value;
+  return tween;
+}
+
+function transition_styleTween(name, value, priority) {
+  var key = "style." + (name += "");
+  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+  if (value == null) return this.tween(key, null);
+  if (typeof value !== "function") throw new Error;
+  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+}
+
+function textConstant$1(value) {
+  return function() {
+    this.textContent = value;
+  };
+}
+
+function textFunction$1(value) {
+  return function() {
+    var value1 = value(this);
+    this.textContent = value1 == null ? "" : value1;
+  };
+}
+
+function transition_text(value) {
+  return this.tween("text", typeof value === "function"
+      ? textFunction$1(tweenValue(this, "text", value))
+      : textConstant$1(value == null ? "" : value + ""));
+}
+
+function transition_transition() {
+  var name = this._name,
+      id0 = this._id,
+      id1 = newId();
+
+  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        var inherit = get$1(node, id0);
+        schedule(node, name, id1, i, group, {
+          time: inherit.time + inherit.delay + inherit.duration,
+          delay: 0,
+          duration: inherit.duration,
+          ease: inherit.ease
+        });
+      }
+    }
+  }
+
+  return new Transition(groups, this._parents, name, id1);
+}
+
+var id = 0;
+
+function Transition(groups, parents, name, id) {
+  this._groups = groups;
+  this._parents = parents;
+  this._name = name;
+  this._id = id;
+}
+
+function transition(name) {
+  return selection().transition(name);
+}
+
+function newId() {
+  return ++id;
+}
+
+var selection_prototype = selection.prototype;
+
+Transition.prototype = transition.prototype = {
+  constructor: Transition,
+  select: transition_select,
+  selectAll: transition_selectAll,
+  filter: transition_filter,
+  merge: transition_merge,
+  selection: transition_selection,
+  transition: transition_transition,
+  call: selection_prototype.call,
+  nodes: selection_prototype.nodes,
+  node: selection_prototype.node,
+  size: selection_prototype.size,
+  empty: selection_prototype.empty,
+  each: selection_prototype.each,
+  on: transition_on,
+  attr: transition_attr,
+  attrTween: transition_attrTween,
+  style: transition_style,
+  styleTween: transition_styleTween,
+  text: transition_text,
+  remove: transition_remove,
+  tween: transition_tween,
+  delay: transition_delay,
+  duration: transition_duration,
+  ease: transition_ease
+};
+
+function linear$1(t) {
+  return +t;
+}
+
+function quadIn(t) {
+  return t * t;
+}
+
+function quadOut(t) {
+  return t * (2 - t);
+}
+
+function quadInOut(t) {
+  return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;
+}
+
+function cubicIn(t) {
+  return t * t * t;
+}
+
+function cubicOut(t) {
+  return --t * t * t + 1;
+}
+
+function cubicInOut(t) {
+  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+}
+
+var exponent = 3;
+
+var polyIn = (function custom(e) {
+  e = +e;
+
+  function polyIn(t) {
+    return Math.pow(t, e);
+  }
+
+  polyIn.exponent = custom;
+
+  return polyIn;
+})(exponent);
+
+var polyOut = (function custom(e) {
+  e = +e;
+
+  function polyOut(t) {
+    return 1 - Math.pow(1 - t, e);
+  }
+
+  polyOut.exponent = custom;
+
+  return polyOut;
+})(exponent);
+
+var polyInOut = (function custom(e) {
+  e = +e;
+
+  function polyInOut(t) {
+    return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
+  }
+
+  polyInOut.exponent = custom;
+
+  return polyInOut;
+})(exponent);
+
+var pi = Math.PI,
+    halfPi = pi / 2;
+
+function sinIn(t) {
+  return 1 - Math.cos(t * halfPi);
+}
+
+function sinOut(t) {
+  return Math.sin(t * halfPi);
+}
+
+function sinInOut(t) {
+  return (1 - Math.cos(pi * t)) / 2;
+}
+
+function expIn(t) {
+  return Math.pow(2, 10 * t - 10);
+}
+
+function expOut(t) {
+  return 1 - Math.pow(2, -10 * t);
+}
+
+function expInOut(t) {
+  return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;
+}
+
+function circleIn(t) {
+  return 1 - Math.sqrt(1 - t * t);
+}
+
+function circleOut(t) {
+  return Math.sqrt(1 - --t * t);
+}
+
+function circleInOut(t) {
+  return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
+}
+
+var b1 = 4 / 11,
+    b2 = 6 / 11,
+    b3 = 8 / 11,
+    b4 = 3 / 4,
+    b5 = 9 / 11,
+    b6 = 10 / 11,
+    b7 = 15 / 16,
+    b8 = 21 / 22,
+    b9 = 63 / 64,
+    b0 = 1 / b1 / b1;
+
+function bounceIn(t) {
+  return 1 - bounceOut(1 - t);
+}
+
+function bounceOut(t) {
+  return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;
+}
+
+function bounceInOut(t) {
+  return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;
+}
+
+var overshoot = 1.70158;
+
+var backIn = (function custom(s) {
+  s = +s;
+
+  function backIn(t) {
+    return t * t * ((s + 1) * t - s);
+  }
+
+  backIn.overshoot = custom;
+
+  return backIn;
+})(overshoot);
+
+var backOut = (function custom(s) {
+  s = +s;
+
+  function backOut(t) {
+    return --t * t * ((s + 1) * t + s) + 1;
+  }
+
+  backOut.overshoot = custom;
+
+  return backOut;
+})(overshoot);
+
+var backInOut = (function custom(s) {
+  s = +s;
+
+  function backInOut(t) {
+    return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
+  }
+
+  backInOut.overshoot = custom;
+
+  return backInOut;
+})(overshoot);
+
+var tau = 2 * Math.PI,
+    amplitude = 1,
+    period = 0.3;
+
+var elasticIn = (function custom(a, p) {
+  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
+
+  function elasticIn(t) {
+    return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);
+  }
+
+  elasticIn.amplitude = function(a) { return custom(a, p * tau); };
+  elasticIn.period = function(p) { return custom(a, p); };
+
+  return elasticIn;
+})(amplitude, period);
+
+var elasticOut = (function custom(a, p) {
+  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
+
+  function elasticOut(t) {
+    return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);
+  }
+
+  elasticOut.amplitude = function(a) { return custom(a, p * tau); };
+  elasticOut.period = function(p) { return custom(a, p); };
+
+  return elasticOut;
+})(amplitude, period);
+
+var elasticInOut = (function custom(a, p) {
+  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
+
+  function elasticInOut(t) {
+    return ((t = t * 2 - 1) < 0
+        ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)
+        : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;
+  }
+
+  elasticInOut.amplitude = function(a) { return custom(a, p * tau); };
+  elasticInOut.period = function(p) { return custom(a, p); };
+
+  return elasticInOut;
+})(amplitude, period);
+
+var defaultTiming = {
+  time: null, // Set on use.
+  delay: 0,
+  duration: 250,
+  ease: cubicInOut
+};
+
+function inherit(node, id) {
+  var timing;
+  while (!(timing = node.__transition) || !(timing = timing[id])) {
+    if (!(node = node.parentNode)) {
+      return defaultTiming.time = now(), defaultTiming;
+    }
+  }
+  return timing;
+}
+
+function selection_transition(name) {
+  var id,
+      timing;
+
+  if (name instanceof Transition) {
+    id = name._id, name = name._name;
+  } else {
+    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
+  }
+
+  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        schedule(node, name, id, i, group, timing || inherit(node, id));
+      }
+    }
+  }
+
+  return new Transition(groups, this._parents, name, id);
+}
+
+selection.prototype.interrupt = selection_interrupt;
+selection.prototype.transition = selection_transition;
+
+var root$1 = [null];
+
+function active(node, name) {
+  var schedules = node.__transition,
+      schedule$$1,
+      i;
+
+  if (schedules) {
+    name = name == null ? null : name + "";
+    for (i in schedules) {
+      if ((schedule$$1 = schedules[i]).state > SCHEDULED && schedule$$1.name === name) {
+        return new Transition([[node]], root$1, name, +i);
+      }
+    }
+  }
+
+  return null;
+}
+
+function constant$4(x) {
+  return function() {
+    return x;
+  };
+}
+
+function BrushEvent(target, type, selection) {
+  this.target = target;
+  this.type = type;
+  this.selection = selection;
+}
+
+function nopropagation$1() {
+  exports.event.stopImmediatePropagation();
+}
+
+function noevent$1() {
+  exports.event.preventDefault();
+  exports.event.stopImmediatePropagation();
+}
+
+var MODE_DRAG = {name: "drag"},
+    MODE_SPACE = {name: "space"},
+    MODE_HANDLE = {name: "handle"},
+    MODE_CENTER = {name: "center"};
+
+var X = {
+  name: "x",
+  handles: ["e", "w"].map(type),
+  input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; },
+  output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }
+};
+
+var Y = {
+  name: "y",
+  handles: ["n", "s"].map(type),
+  input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; },
+  output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }
+};
+
+var XY = {
+  name: "xy",
+  handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type),
+  input: function(xy) { return xy; },
+  output: function(xy) { return xy; }
+};
+
+var cursors = {
+  overlay: "crosshair",
+  selection: "move",
+  n: "ns-resize",
+  e: "ew-resize",
+  s: "ns-resize",
+  w: "ew-resize",
+  nw: "nwse-resize",
+  ne: "nesw-resize",
+  se: "nwse-resize",
+  sw: "nesw-resize"
+};
+
+var flipX = {
+  e: "w",
+  w: "e",
+  nw: "ne",
+  ne: "nw",
+  se: "sw",
+  sw: "se"
+};
+
+var flipY = {
+  n: "s",
+  s: "n",
+  nw: "sw",
+  ne: "se",
+  se: "ne",
+  sw: "nw"
+};
+
+var signsX = {
+  overlay: +1,
+  selection: +1,
+  n: null,
+  e: +1,
+  s: null,
+  w: -1,
+  nw: -1,
+  ne: +1,
+  se: +1,
+  sw: -1
+};
+
+var signsY = {
+  overlay: +1,
+  selection: +1,
+  n: -1,
+  e: null,
+  s: +1,
+  w: null,
+  nw: -1,
+  ne: -1,
+  se: +1,
+  sw: +1
+};
+
+function type(t) {
+  return {type: t};
+}
+
+// Ignore right-click, since that should open the context menu.
+function defaultFilter$1() {
+  return !exports.event.button;
+}
+
+function defaultExtent() {
+  var svg = this.ownerSVGElement || this;
+  return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];
+}
+
+// Like d3.local, but with the name “__brush” rather than auto-generated.
+function local$1(node) {
+  while (!node.__brush) if (!(node = node.parentNode)) return;
+  return node.__brush;
+}
+
+function empty$1(extent) {
+  return extent[0][0] === extent[1][0]
+      || extent[0][1] === extent[1][1];
+}
+
+function brushSelection(node) {
+  var state = node.__brush;
+  return state ? state.dim.output(state.selection) : null;
+}
+
+function brushX() {
+  return brush$1(X);
+}
+
+function brushY() {
+  return brush$1(Y);
+}
+
+function brush() {
+  return brush$1(XY);
+}
+
+function brush$1(dim) {
+  var extent = defaultExtent,
+      filter = defaultFilter$1,
+      listeners = dispatch(brush, "start", "brush", "end"),
+      handleSize = 6,
+      touchending;
+
+  function brush(group) {
+    var overlay = group
+        .property("__brush", initialize)
+      .selectAll(".overlay")
+      .data([type("overlay")]);
+
+    overlay.enter().append("rect")
+        .attr("class", "overlay")
+        .attr("pointer-events", "all")
+        .attr("cursor", cursors.overlay)
+      .merge(overlay)
+        .each(function() {
+          var extent = local$1(this).extent;
+          select(this)
+              .attr("x", extent[0][0])
+              .attr("y", extent[0][1])
+              .attr("width", extent[1][0] - extent[0][0])
+              .attr("height", extent[1][1] - extent[0][1]);
+        });
+
+    group.selectAll(".selection")
+      .data([type("selection")])
+      .enter().append("rect")
+        .attr("class", "selection")
+        .attr("cursor", cursors.selection)
+        .attr("fill", "#777")
+        .attr("fill-opacity", 0.3)
+        .attr("stroke", "#fff")
+        .attr("shape-rendering", "crispEdges");
+
+    var handle = group.selectAll(".handle")
+      .data(dim.handles, function(d) { return d.type; });
+
+    handle.exit().remove();
+
+    handle.enter().append("rect")
+        .attr("class", function(d) { return "handle handle--" + d.type; })
+        .attr("cursor", function(d) { return cursors[d.type]; });
+
+    group
+        .each(redraw)
+        .attr("fill", "none")
+        .attr("pointer-events", "all")
+        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)")
+        .on("mousedown.brush touchstart.brush", started);
+  }
+
+  brush.move = function(group, selection$$1) {
+    if (group.selection) {
+      group
+          .on("start.brush", function() { emitter(this, arguments).beforestart().start(); })
+          .on("interrupt.brush end.brush", function() { emitter(this, arguments).end(); })
+          .tween("brush", function() {
+            var that = this,
+                state = that.__brush,
+                emit = emitter(that, arguments),
+                selection0 = state.selection,
+                selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(this, arguments) : selection$$1, state.extent),
+                i = interpolateValue(selection0, selection1);
+
+            function tween(t) {
+              state.selection = t === 1 && empty$1(selection1) ? null : i(t);
+              redraw.call(that);
+              emit.brush();
+            }
+
+            return selection0 && selection1 ? tween : tween(1);
+          });
+    } else {
+      group
+          .each(function() {
+            var that = this,
+                args = arguments,
+                state = that.__brush,
+                selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(that, args) : selection$$1, state.extent),
+                emit = emitter(that, args).beforestart();
+
+            interrupt(that);
+            state.selection = selection1 == null || empty$1(selection1) ? null : selection1;
+            redraw.call(that);
+            emit.start().brush().end();
+          });
+    }
+  };
+
+  function redraw() {
+    var group = select(this),
+        selection$$1 = local$1(this).selection;
+
+    if (selection$$1) {
+      group.selectAll(".selection")
+          .style("display", null)
+          .attr("x", selection$$1[0][0])
+          .attr("y", selection$$1[0][1])
+          .attr("width", selection$$1[1][0] - selection$$1[0][0])
+          .attr("height", selection$$1[1][1] - selection$$1[0][1]);
+
+      group.selectAll(".handle")
+          .style("display", null)
+          .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; })
+          .attr("y", function(d) { return d.type[0] === "s" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; })
+          .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; })
+          .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; });
+    }
+
+    else {
+      group.selectAll(".selection,.handle")
+          .style("display", "none")
+          .attr("x", null)
+          .attr("y", null)
+          .attr("width", null)
+          .attr("height", null);
+    }
+  }
+
+  function emitter(that, args) {
+    return that.__brush.emitter || new Emitter(that, args);
+  }
+
+  function Emitter(that, args) {
+    this.that = that;
+    this.args = args;
+    this.state = that.__brush;
+    this.active = 0;
+  }
+
+  Emitter.prototype = {
+    beforestart: function() {
+      if (++this.active === 1) this.state.emitter = this, this.starting = true;
+      return this;
+    },
+    start: function() {
+      if (this.starting) this.starting = false, this.emit("start");
+      return this;
+    },
+    brush: function() {
+      this.emit("brush");
+      return this;
+    },
+    end: function() {
+      if (--this.active === 0) delete this.state.emitter, this.emit("end");
+      return this;
+    },
+    emit: function(type) {
+      customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]);
+    }
+  };
+
+  function started() {
+    if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$1(); }
+    else if (touchending) return;
+    if (!filter.apply(this, arguments)) return;
+
+    var that = this,
+        type = exports.event.target.__data__.type,
+        mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
+        signX = dim === Y ? null : signsX[type],
+        signY = dim === X ? null : signsY[type],
+        state = local$1(that),
+        extent = state.extent,
+        selection$$1 = state.selection,
+        W = extent[0][0], w0, w1,
+        N = extent[0][1], n0, n1,
+        E = extent[1][0], e0, e1,
+        S = extent[1][1], s0, s1,
+        dx,
+        dy,
+        moving,
+        shifting = signX && signY && exports.event.shiftKey,
+        lockX,
+        lockY,
+        point0 = mouse(that),
+        point$$1 = point0,
+        emit = emitter(that, arguments).beforestart();
+
+    if (type === "overlay") {
+      state.selection = selection$$1 = [
+        [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],
+        [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]
+      ];
+    } else {
+      w0 = selection$$1[0][0];
+      n0 = selection$$1[0][1];
+      e0 = selection$$1[1][0];
+      s0 = selection$$1[1][1];
+    }
+
+    w1 = w0;
+    n1 = n0;
+    e1 = e0;
+    s1 = s0;
+
+    var group = select(that)
+        .attr("pointer-events", "none");
+
+    var overlay = group.selectAll(".overlay")
+        .attr("cursor", cursors[type]);
+
+    if (exports.event.touches) {
+      group
+          .on("touchmove.brush", moved, true)
+          .on("touchend.brush touchcancel.brush", ended, true);
+    } else {
+      var view = select(exports.event.view)
+          .on("keydown.brush", keydowned, true)
+          .on("keyup.brush", keyupped, true)
+          .on("mousemove.brush", moved, true)
+          .on("mouseup.brush", ended, true);
+
+      dragDisable(exports.event.view);
+    }
+
+    nopropagation$1();
+    interrupt(that);
+    redraw.call(that);
+    emit.start();
+
+    function moved() {
+      var point1 = mouse(that);
+      if (shifting && !lockX && !lockY) {
+        if (Math.abs(point1[0] - point$$1[0]) > Math.abs(point1[1] - point$$1[1])) lockY = true;
+        else lockX = true;
+      }
+      point$$1 = point1;
+      moving = true;
+      noevent$1();
+      move();
+    }
+
+    function move() {
+      var t;
+
+      dx = point$$1[0] - point0[0];
+      dy = point$$1[1] - point0[1];
+
+      switch (mode) {
+        case MODE_SPACE:
+        case MODE_DRAG: {
+          if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx;
+          if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy;
+          break;
+        }
+        case MODE_HANDLE: {
+          if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0;
+          else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx;
+          if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0;
+          else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy;
+          break;
+        }
+        case MODE_CENTER: {
+          if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX));
+          if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY));
+          break;
+        }
+      }
+
+      if (e1 < w1) {
+        signX *= -1;
+        t = w0, w0 = e0, e0 = t;
+        t = w1, w1 = e1, e1 = t;
+        if (type in flipX) overlay.attr("cursor", cursors[type = flipX[type]]);
+      }
+
+      if (s1 < n1) {
+        signY *= -1;
+        t = n0, n0 = s0, s0 = t;
+        t = n1, n1 = s1, s1 = t;
+        if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
+      }
+
+      if (state.selection) selection$$1 = state.selection; // May be set by brush.move!
+      if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0];
+      if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1];
+
+      if (selection$$1[0][0] !== w1
+          || selection$$1[0][1] !== n1
+          || selection$$1[1][0] !== e1
+          || selection$$1[1][1] !== s1) {
+        state.selection = [[w1, n1], [e1, s1]];
+        redraw.call(that);
+        emit.brush();
+      }
+    }
+
+    function ended() {
+      nopropagation$1();
+      if (exports.event.touches) {
+        if (exports.event.touches.length) return;
+        if (touchending) clearTimeout(touchending);
+        touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
+        group.on("touchmove.brush touchend.brush touchcancel.brush", null);
+      } else {
+        yesdrag(exports.event.view, moving);
+        view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null);
+      }
+      group.attr("pointer-events", "all");
+      overlay.attr("cursor", cursors.overlay);
+      if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)!
+      if (empty$1(selection$$1)) state.selection = null, redraw.call(that);
+      emit.end();
+    }
+
+    function keydowned() {
+      switch (exports.event.keyCode) {
+        case 16: { // SHIFT
+          shifting = signX && signY;
+          break;
+        }
+        case 18: { // ALT
+          if (mode === MODE_HANDLE) {
+            if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
+            if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
+            mode = MODE_CENTER;
+            move();
+          }
+          break;
+        }
+        case 32: { // SPACE; takes priority over ALT
+          if (mode === MODE_HANDLE || mode === MODE_CENTER) {
+            if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx;
+            if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy;
+            mode = MODE_SPACE;
+            overlay.attr("cursor", cursors.selection);
+            move();
+          }
+          break;
+        }
+        default: return;
+      }
+      noevent$1();
+    }
+
+    function keyupped() {
+      switch (exports.event.keyCode) {
+        case 16: { // SHIFT
+          if (shifting) {
+            lockX = lockY = shifting = false;
+            move();
+          }
+          break;
+        }
+        case 18: { // ALT
+          if (mode === MODE_CENTER) {
+            if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;
+            if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;
+            mode = MODE_HANDLE;
+            move();
+          }
+          break;
+        }
+        case 32: { // SPACE
+          if (mode === MODE_SPACE) {
+            if (exports.event.altKey) {
+              if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
+              if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
+              mode = MODE_CENTER;
+            } else {
+              if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;
+              if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;
+              mode = MODE_HANDLE;
+            }
+            overlay.attr("cursor", cursors[type]);
+            move();
+          }
+          break;
+        }
+        default: return;
+      }
+      noevent$1();
+    }
+  }
+
+  function initialize() {
+    var state = this.__brush || {selection: null};
+    state.extent = extent.apply(this, arguments);
+    state.dim = dim;
+    return state;
+  }
+
+  brush.extent = function(_) {
+    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent;
+  };
+
+  brush.filter = function(_) {
+    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$4(!!_), brush) : filter;
+  };
+
+  brush.handleSize = function(_) {
+    return arguments.length ? (handleSize = +_, brush) : handleSize;
+  };
+
+  brush.on = function() {
+    var value = listeners.on.apply(listeners, arguments);
+    return value === listeners ? brush : value;
+  };
+
+  return brush;
+}
+
+var cos = Math.cos;
+var sin = Math.sin;
+var pi$1 = Math.PI;
+var halfPi$1 = pi$1 / 2;
+var tau$1 = pi$1 * 2;
+var max$1 = Math.max;
+
+function compareValue(compare) {
+  return function(a, b) {
+    return compare(
+      a.source.value + a.target.value,
+      b.source.value + b.target.value
+    );
+  };
+}
+
+function chord() {
+  var padAngle = 0,
+      sortGroups = null,
+      sortSubgroups = null,
+      sortChords = null;
+
+  function chord(matrix) {
+    var n = matrix.length,
+        groupSums = [],
+        groupIndex = sequence(n),
+        subgroupIndex = [],
+        chords = [],
+        groups = chords.groups = new Array(n),
+        subgroups = new Array(n * n),
+        k,
+        x,
+        x0,
+        dx,
+        i,
+        j;
+
+    // Compute the sum.
+    k = 0, i = -1; while (++i < n) {
+      x = 0, j = -1; while (++j < n) {
+        x += matrix[i][j];
+      }
+      groupSums.push(x);
+      subgroupIndex.push(sequence(n));
+      k += x;
+    }
+
+    // Sort groups…
+    if (sortGroups) groupIndex.sort(function(a, b) {
+      return sortGroups(groupSums[a], groupSums[b]);
+    });
+
+    // Sort subgroups…
+    if (sortSubgroups) subgroupIndex.forEach(function(d, i) {
+      d.sort(function(a, b) {
+        return sortSubgroups(matrix[i][a], matrix[i][b]);
+      });
+    });
+
+    // Convert the sum to scaling factor for [0, 2pi].
+    // TODO Allow start and end angle to be specified?
+    // TODO Allow padding to be specified as percentage?
+    k = max$1(0, tau$1 - padAngle * n) / k;
+    dx = k ? padAngle : tau$1 / n;
+
+    // Compute the start and end angle for each group and subgroup.
+    // Note: Opera has a bug reordering object literal properties!
+    x = 0, i = -1; while (++i < n) {
+      x0 = x, j = -1; while (++j < n) {
+        var di = groupIndex[i],
+            dj = subgroupIndex[di][j],
+            v = matrix[di][dj],
+            a0 = x,
+            a1 = x += v * k;
+        subgroups[dj * n + di] = {
+          index: di,
+          subindex: dj,
+          startAngle: a0,
+          endAngle: a1,
+          value: v
+        };
+      }
+      groups[di] = {
+        index: di,
+        startAngle: x0,
+        endAngle: x,
+        value: groupSums[di]
+      };
+      x += dx;
+    }
+
+    // Generate chords for each (non-empty) subgroup-subgroup link.
+    i = -1; while (++i < n) {
+      j = i - 1; while (++j < n) {
+        var source = subgroups[j * n + i],
+            target = subgroups[i * n + j];
+        if (source.value || target.value) {
+          chords.push(source.value < target.value
+              ? {source: target, target: source}
+              : {source: source, target: target});
+        }
+      }
+    }
+
+    return sortChords ? chords.sort(sortChords) : chords;
+  }
+
+  chord.padAngle = function(_) {
+    return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;
+  };
+
+  chord.sortGroups = function(_) {
+    return arguments.length ? (sortGroups = _, chord) : sortGroups;
+  };
+
+  chord.sortSubgroups = function(_) {
+    return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;
+  };
+
+  chord.sortChords = function(_) {
+    return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;
+  };
+
+  return chord;
+}
+
+var slice$2 = Array.prototype.slice;
+
+function constant$5(x) {
+  return function() {
+    return x;
+  };
+}
+
+var pi$2 = Math.PI,
+    tau$2 = 2 * pi$2,
+    epsilon$1 = 1e-6,
+    tauEpsilon = tau$2 - epsilon$1;
+
+function Path() {
+  this._x0 = this._y0 = // start of current subpath
+  this._x1 = this._y1 = null; // end of current subpath
+  this._ = "";
+}
+
+function path() {
+  return new Path;
+}
+
+Path.prototype = path.prototype = {
+  constructor: Path,
+  moveTo: function(x, y) {
+    this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y);
+  },
+  closePath: function() {
+    if (this._x1 !== null) {
+      this._x1 = this._x0, this._y1 = this._y0;
+      this._ += "Z";
+    }
+  },
+  lineTo: function(x, y) {
+    this._ += "L" + (this._x1 = +x) + "," + (this._y1 = +y);
+  },
+  quadraticCurveTo: function(x1, y1, x, y) {
+    this._ += "Q" + (+x1) + "," + (+y1) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
+  },
+  bezierCurveTo: function(x1, y1, x2, y2, x, y) {
+    this._ += "C" + (+x1) + "," + (+y1) + "," + (+x2) + "," + (+y2) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
+  },
+  arcTo: function(x1, y1, x2, y2, r) {
+    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;
+    var x0 = this._x1,
+        y0 = this._y1,
+        x21 = x2 - x1,
+        y21 = y2 - y1,
+        x01 = x0 - x1,
+        y01 = y0 - y1,
+        l01_2 = x01 * x01 + y01 * y01;
+
+    // Is the radius negative? Error.
+    if (r < 0) throw new Error("negative radius: " + r);
+
+    // Is this path empty? Move to (x1,y1).
+    if (this._x1 === null) {
+      this._ += "M" + (this._x1 = x1) + "," + (this._y1 = y1);
+    }
+
+    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
+    else if (!(l01_2 > epsilon$1)) {}
+
+    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
+    // Equivalently, is (x1,y1) coincident with (x2,y2)?
+    // Or, is the radius zero? Line to (x1,y1).
+    else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon$1) || !r) {
+      this._ += "L" + (this._x1 = x1) + "," + (this._y1 = y1);
+    }
+
+    // Otherwise, draw an arc!
+    else {
+      var x20 = x2 - x0,
+          y20 = y2 - y0,
+          l21_2 = x21 * x21 + y21 * y21,
+          l20_2 = x20 * x20 + y20 * y20,
+          l21 = Math.sqrt(l21_2),
+          l01 = Math.sqrt(l01_2),
+          l = r * Math.tan((pi$2 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
+          t01 = l / l01,
+          t21 = l / l21;
+
+      // If the start tangent is not coincident with (x0,y0), line to.
+      if (Math.abs(t01 - 1) > epsilon$1) {
+        this._ += "L" + (x1 + t01 * x01) + "," + (y1 + t01 * y01);
+      }
+
+      this._ += "A" + r + "," + r + ",0,0," + (+(y01 * x20 > x01 * y20)) + "," + (this._x1 = x1 + t21 * x21) + "," + (this._y1 = y1 + t21 * y21);
+    }
+  },
+  arc: function(x, y, r, a0, a1, ccw) {
+    x = +x, y = +y, r = +r;
+    var dx = r * Math.cos(a0),
+        dy = r * Math.sin(a0),
+        x0 = x + dx,
+        y0 = y + dy,
+        cw = 1 ^ ccw,
+        da = ccw ? a0 - a1 : a1 - a0;
+
+    // Is the radius negative? Error.
+    if (r < 0) throw new Error("negative radius: " + r);
+
+    // Is this path empty? Move to (x0,y0).
+    if (this._x1 === null) {
+      this._ += "M" + x0 + "," + y0;
+    }
+
+    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
+    else if (Math.abs(this._x1 - x0) > epsilon$1 || Math.abs(this._y1 - y0) > epsilon$1) {
+      this._ += "L" + x0 + "," + y0;
+    }
+
+    // Is this arc empty? We’re done.
+    if (!r) return;
+
+    // Does the angle go the wrong way? Flip the direction.
+    if (da < 0) da = da % tau$2 + tau$2;
+
+    // Is this a complete circle? Draw two arcs to complete the circle.
+    if (da > tauEpsilon) {
+      this._ += "A" + r + "," + r + ",0,1," + cw + "," + (x - dx) + "," + (y - dy) + "A" + r + "," + r + ",0,1," + cw + "," + (this._x1 = x0) + "," + (this._y1 = y0);
+    }
+
+    // Is this arc non-empty? Draw an arc!
+    else if (da > epsilon$1) {
+      this._ += "A" + r + "," + r + ",0," + (+(da >= pi$2)) + "," + cw + "," + (this._x1 = x + r * Math.cos(a1)) + "," + (this._y1 = y + r * Math.sin(a1));
+    }
+  },
+  rect: function(x, y, w, h) {
+    this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y) + "h" + (+w) + "v" + (+h) + "h" + (-w) + "Z";
+  },
+  toString: function() {
+    return this._;
+  }
+};
+
+function defaultSource(d) {
+  return d.source;
+}
+
+function defaultTarget(d) {
+  return d.target;
+}
+
+function defaultRadius(d) {
+  return d.radius;
+}
+
+function defaultStartAngle(d) {
+  return d.startAngle;
+}
+
+function defaultEndAngle(d) {
+  return d.endAngle;
+}
+
+function ribbon() {
+  var source = defaultSource,
+      target = defaultTarget,
+      radius = defaultRadius,
+      startAngle = defaultStartAngle,
+      endAngle = defaultEndAngle,
+      context = null;
+
+  function ribbon() {
+    var buffer,
+        argv = slice$2.call(arguments),
+        s = source.apply(this, argv),
+        t = target.apply(this, argv),
+        sr = +radius.apply(this, (argv[0] = s, argv)),
+        sa0 = startAngle.apply(this, argv) - halfPi$1,
+        sa1 = endAngle.apply(this, argv) - halfPi$1,
+        sx0 = sr * cos(sa0),
+        sy0 = sr * sin(sa0),
+        tr = +radius.apply(this, (argv[0] = t, argv)),
+        ta0 = startAngle.apply(this, argv) - halfPi$1,
+        ta1 = endAngle.apply(this, argv) - halfPi$1;
+
+    if (!context) context = buffer = path();
+
+    context.moveTo(sx0, sy0);
+    context.arc(0, 0, sr, sa0, sa1);
+    if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr?
+      context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0));
+      context.arc(0, 0, tr, ta0, ta1);
+    }
+    context.quadraticCurveTo(0, 0, sx0, sy0);
+    context.closePath();
+
+    if (buffer) return context = null, buffer + "" || null;
+  }
+
+  ribbon.radius = function(_) {
+    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$5(+_), ribbon) : radius;
+  };
+
+  ribbon.startAngle = function(_) {
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : startAngle;
+  };
+
+  ribbon.endAngle = function(_) {
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : endAngle;
+  };
+
+  ribbon.source = function(_) {
+    return arguments.length ? (source = _, ribbon) : source;
+  };
+
+  ribbon.target = function(_) {
+    return arguments.length ? (target = _, ribbon) : target;
+  };
+
+  ribbon.context = function(_) {
+    return arguments.length ? (context = _ == null ? null : _, ribbon) : context;
+  };
+
+  return ribbon;
+}
+
+var prefix = "$";
+
+function Map() {}
+
+Map.prototype = map$1.prototype = {
+  constructor: Map,
+  has: function(key) {
+    return (prefix + key) in this;
+  },
+  get: function(key) {
+    return this[prefix + key];
+  },
+  set: function(key, value) {
+    this[prefix + key] = value;
+    return this;
+  },
+  remove: function(key) {
+    var property = prefix + key;
+    return property in this && delete this[property];
+  },
+  clear: function() {
+    for (var property in this) if (property[0] === prefix) delete this[property];
+  },
+  keys: function() {
+    var keys = [];
+    for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
+    return keys;
+  },
+  values: function() {
+    var values = [];
+    for (var property in this) if (property[0] === prefix) values.push(this[property]);
+    return values;
+  },
+  entries: function() {
+    var entries = [];
+    for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});
+    return entries;
+  },
+  size: function() {
+    var size = 0;
+    for (var property in this) if (property[0] === prefix) ++size;
+    return size;
+  },
+  empty: function() {
+    for (var property in this) if (property[0] === prefix) return false;
+    return true;
+  },
+  each: function(f) {
+    for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
+  }
+};
+
+function map$1(object, f) {
+  var map = new Map;
+
+  // Copy constructor.
+  if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });
+
+  // Index array by numeric index or specified key function.
+  else if (Array.isArray(object)) {
+    var i = -1,
+        n = object.length,
+        o;
+
+    if (f == null) while (++i < n) map.set(i, object[i]);
+    else while (++i < n) map.set(f(o = object[i], i, object), o);
+  }
+
+  // Convert object to map.
+  else if (object) for (var key in object) map.set(key, object[key]);
+
+  return map;
+}
+
+function nest() {
+  var keys = [],
+      sortKeys = [],
+      sortValues,
+      rollup,
+      nest;
+
+  function apply(array, depth, createResult, setResult) {
+    if (depth >= keys.length) {
+      if (sortValues != null) array.sort(sortValues);
+      return rollup != null ? rollup(array) : array;
+    }
+
+    var i = -1,
+        n = array.length,
+        key = keys[depth++],
+        keyValue,
+        value,
+        valuesByKey = map$1(),
+        values,
+        result = createResult();
+
+    while (++i < n) {
+      if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
+        values.push(value);
+      } else {
+        valuesByKey.set(keyValue, [value]);
+      }
+    }
+
+    valuesByKey.each(function(values, key) {
+      setResult(result, key, apply(values, depth, createResult, setResult));
+    });
+
+    return result;
+  }
+
+  function entries(map, depth) {
+    if (++depth > keys.length) return map;
+    var array, sortKey = sortKeys[depth - 1];
+    if (rollup != null && depth >= keys.length) array = map.entries();
+    else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });
+    return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;
+  }
+
+  return nest = {
+    object: function(array) { return apply(array, 0, createObject, setObject); },
+    map: function(array) { return apply(array, 0, createMap, setMap); },
+    entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },
+    key: function(d) { keys.push(d); return nest; },
+    sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },
+    sortValues: function(order) { sortValues = order; return nest; },
+    rollup: function(f) { rollup = f; return nest; }
+  };
+}
+
+function createObject() {
+  return {};
+}
+
+function setObject(object, key, value) {
+  object[key] = value;
+}
+
+function createMap() {
+  return map$1();
+}
+
+function setMap(map, key, value) {
+  map.set(key, value);
+}
+
+function Set() {}
+
+var proto = map$1.prototype;
+
+Set.prototype = set$2.prototype = {
+  constructor: Set,
+  has: proto.has,
+  add: function(value) {
+    value += "";
+    this[prefix + value] = value;
+    return this;
+  },
+  remove: proto.remove,
+  clear: proto.clear,
+  values: proto.keys,
+  size: proto.size,
+  empty: proto.empty,
+  each: proto.each
+};
+
+function set$2(object, f) {
+  var set = new Set;
+
+  // Copy constructor.
+  if (object instanceof Set) object.each(function(value) { set.add(value); });
+
+  // Otherwise, assume it’s an array.
+  else if (object) {
+    var i = -1, n = object.length;
+    if (f == null) while (++i < n) set.add(object[i]);
+    else while (++i < n) set.add(f(object[i], i, object));
+  }
+
+  return set;
+}
+
+function keys(map) {
+  var keys = [];
+  for (var key in map) keys.push(key);
+  return keys;
+}
+
+function values(map) {
+  var values = [];
+  for (var key in map) values.push(map[key]);
+  return values;
+}
+
+function entries(map) {
+  var entries = [];
+  for (var key in map) entries.push({key: key, value: map[key]});
+  return entries;
+}
+
+var array$2 = Array.prototype;
+
+var slice$3 = array$2.slice;
+
+function ascending$2(a, b) {
+  return a - b;
+}
+
+function area(ring) {
+  var i = 0, n = ring.length, area = ring[n - 1][1] * ring[0][0] - ring[n - 1][0] * ring[0][1];
+  while (++i < n) area += ring[i - 1][1] * ring[i][0] - ring[i - 1][0] * ring[i][1];
+  return area;
+}
+
+function constant$6(x) {
+  return function() {
+    return x;
+  };
+}
+
+function contains(ring, hole) {
+  var i = -1, n = hole.length, c;
+  while (++i < n) if (c = ringContains(ring, hole[i])) return c;
+  return 0;
+}
+
+function ringContains(ring, point) {
+  var x = point[0], y = point[1], contains = -1;
+  for (var i = 0, n = ring.length, j = n - 1; i < n; j = i++) {
+    var pi = ring[i], xi = pi[0], yi = pi[1], pj = ring[j], xj = pj[0], yj = pj[1];
+    if (segmentContains(pi, pj, point)) return 0;
+    if (((yi > y) !== (yj > y)) && ((x < (xj - xi) * (y - yi) / (yj - yi) + xi))) contains = -contains;
+  }
+  return contains;
+}
+
+function segmentContains(a, b, c) {
+  var i; return collinear(a, b, c) && within(a[i = +(a[0] === b[0])], c[i], b[i]);
+}
+
+function collinear(a, b, c) {
+  return (b[0] - a[0]) * (c[1] - a[1]) === (c[0] - a[0]) * (b[1] - a[1]);
+}
+
+function within(p, q, r) {
+  return p <= q && q <= r || r <= q && q <= p;
+}
+
+function noop$1() {}
+
+var cases = [
+  [],
+  [[[1.0, 1.5], [0.5, 1.0]]],
+  [[[1.5, 1.0], [1.0, 1.5]]],
+  [[[1.5, 1.0], [0.5, 1.0]]],
+  [[[1.0, 0.5], [1.5, 1.0]]],
+  [[[1.0, 1.5], [0.5, 1.0]], [[1.0, 0.5], [1.5, 1.0]]],
+  [[[1.0, 0.5], [1.0, 1.5]]],
+  [[[1.0, 0.5], [0.5, 1.0]]],
+  [[[0.5, 1.0], [1.0, 0.5]]],
+  [[[1.0, 1.5], [1.0, 0.5]]],
+  [[[0.5, 1.0], [1.0, 0.5]], [[1.5, 1.0], [1.0, 1.5]]],
+  [[[1.5, 1.0], [1.0, 0.5]]],
+  [[[0.5, 1.0], [1.5, 1.0]]],
+  [[[1.0, 1.5], [1.5, 1.0]]],
+  [[[0.5, 1.0], [1.0, 1.5]]],
+  []
+];
+
+function contours() {
+  var dx = 1,
+      dy = 1,
+      threshold$$1 = thresholdSturges,
+      smooth = smoothLinear;
+
+  function contours(values) {
+    var tz = threshold$$1(values);
+
+    // Convert number of thresholds into uniform thresholds.
+    if (!Array.isArray(tz)) {
+      var domain = extent(values), start = domain[0], stop = domain[1];
+      tz = tickStep(start, stop, tz);
+      tz = sequence(Math.floor(start / tz) * tz, Math.floor(stop / tz) * tz, tz);
+    } else {
+      tz = tz.slice().sort(ascending$2);
+    }
+
+    return tz.map(function(value) {
+      return contour(values, value);
+    });
+  }
+
+  // Accumulate, smooth contour rings, assign holes to exterior rings.
+  // Based on https://github.com/mbostock/shapefile/blob/v0.6.2/shp/polygon.js
+  function contour(values, value) {
+    var polygons = [],
+        holes = [];
+
+    isorings(values, value, function(ring) {
+      smooth(ring, values, value);
+      if (area(ring) > 0) polygons.push([ring]);
+      else holes.push(ring);
+    });
+
+    holes.forEach(function(hole) {
+      for (var i = 0, n = polygons.length, polygon; i < n; ++i) {
+        if (contains((polygon = polygons[i])[0], hole) !== -1) {
+          polygon.push(hole);
+          return;
+        }
+      }
+    });
+
+    return {
+      type: "MultiPolygon",
+      value: value,
+      coordinates: polygons
+    };
+  }
+
+  // Marching squares with isolines stitched into rings.
+  // Based on https://github.com/topojson/topojson-client/blob/v3.0.0/src/stitch.js
+  function isorings(values, value, callback) {
+    var fragmentByStart = new Array,
+        fragmentByEnd = new Array,
+        x, y, t0, t1, t2, t3;
+
+    // Special case for the first row (y = -1, t2 = t3 = 0).
+    x = y = -1;
+    t1 = values[0] >= value;
+    cases[t1 << 1].forEach(stitch);
+    while (++x < dx - 1) {
+      t0 = t1, t1 = values[x + 1] >= value;
+      cases[t0 | t1 << 1].forEach(stitch);
+    }
+    cases[t1 << 0].forEach(stitch);
+
+    // General case for the intermediate rows.
+    while (++y < dy - 1) {
+      x = -1;
+      t1 = values[y * dx + dx] >= value;
+      t2 = values[y * dx] >= value;
+      cases[t1 << 1 | t2 << 2].forEach(stitch);
+      while (++x < dx - 1) {
+        t0 = t1, t1 = values[y * dx + dx + x + 1] >= value;
+        t3 = t2, t2 = values[y * dx + x + 1] >= value;
+        cases[t0 | t1 << 1 | t2 << 2 | t3 << 3].forEach(stitch);
+      }
+      cases[t1 | t2 << 3].forEach(stitch);
+    }
+
+    // Special case for the last row (y = dy - 1, t0 = t1 = 0).
+    x = -1;
+    t2 = values[y * dx] >= value;
+    cases[t2 << 2].forEach(stitch);
+    while (++x < dx - 1) {
+      t3 = t2, t2 = values[y * dx + x + 1] >= value;
+      cases[t2 << 2 | t3 << 3].forEach(stitch);
+    }
+    cases[t2 << 3].forEach(stitch);
+
+    function stitch(line) {
+      var start = [line[0][0] + x, line[0][1] + y],
+          end = [line[1][0] + x, line[1][1] + y],
+          startIndex = index(start),
+          endIndex = index(end),
+          f, g;
+      if (f = fragmentByEnd[startIndex]) {
+        if (g = fragmentByStart[endIndex]) {
+          delete fragmentByEnd[f.end];
+          delete fragmentByStart[g.start];
+          if (f === g) {
+            f.ring.push(end);
+            callback(f.ring);
+          } else {
+            fragmentByStart[f.start] = fragmentByEnd[g.end] = {start: f.start, end: g.end, ring: f.ring.concat(g.ring)};
+          }
+        } else {
+          delete fragmentByEnd[f.end];
+          f.ring.push(end);
+          fragmentByEnd[f.end = endIndex] = f;
+        }
+      } else if (f = fragmentByStart[endIndex]) {
+        if (g = fragmentByEnd[startIndex]) {
+          delete fragmentByStart[f.start];
+          delete fragmentByEnd[g.end];
+          if (f === g) {
+            f.ring.push(end);
+            callback(f.ring);
+          } else {
+            fragmentByStart[g.start] = fragmentByEnd[f.end] = {start: g.start, end: f.end, ring: g.ring.concat(f.ring)};
+          }
+        } else {
+          delete fragmentByStart[f.start];
+          f.ring.unshift(start);
+          fragmentByStart[f.start = startIndex] = f;
+        }
+      } else {
+        fragmentByStart[startIndex] = fragmentByEnd[endIndex] = {start: startIndex, end: endIndex, ring: [start, end]};
+      }
+    }
+  }
+
+  function index(point) {
+    return point[0] * 2 + point[1] * (dx + 1) * 4;
+  }
+
+  function smoothLinear(ring, values, value) {
+    ring.forEach(function(point) {
+      var x = point[0],
+          y = point[1],
+          xt = x | 0,
+          yt = y | 0,
+          v0,
+          v1 = values[yt * dx + xt];
+      if (x > 0 && x < dx && xt === x) {
+        v0 = values[yt * dx + xt - 1];
+        point[0] = x + (value - v0) / (v1 - v0) - 0.5;
+      }
+      if (y > 0 && y < dy && yt === y) {
+        v0 = values[(yt - 1) * dx + xt];
+        point[1] = y + (value - v0) / (v1 - v0) - 0.5;
+      }
+    });
+  }
+
+  contours.contour = contour;
+
+  contours.size = function(_) {
+    if (!arguments.length) return [dx, dy];
+    var _0 = Math.ceil(_[0]), _1 = Math.ceil(_[1]);
+    if (!(_0 > 0) || !(_1 > 0)) throw new Error("invalid size");
+    return dx = _0, dy = _1, contours;
+  };
+
+  contours.thresholds = function(_) {
+    return arguments.length ? (threshold$$1 = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), contours) : threshold$$1;
+  };
+
+  contours.smooth = function(_) {
+    return arguments.length ? (smooth = _ ? smoothLinear : noop$1, contours) : smooth === smoothLinear;
+  };
+
+  return contours;
+}
+
+// TODO Optimize edge cases.
+// TODO Optimize index calculation.
+// TODO Optimize arguments.
+function blurX(source, target, r) {
+  var n = source.width,
+      m = source.height,
+      w = (r << 1) + 1;
+  for (var j = 0; j < m; ++j) {
+    for (var i = 0, sr = 0; i < n + r; ++i) {
+      if (i < n) {
+        sr += source.data[i + j * n];
+      }
+      if (i >= r) {
+        if (i >= w) {
+          sr -= source.data[i - w + j * n];
+        }
+        target.data[i - r + j * n] = sr / Math.min(i + 1, n - 1 + w - i, w);
+      }
+    }
+  }
+}
+
+// TODO Optimize edge cases.
+// TODO Optimize index calculation.
+// TODO Optimize arguments.
+function blurY(source, target, r) {
+  var n = source.width,
+      m = source.height,
+      w = (r << 1) + 1;
+  for (var i = 0; i < n; ++i) {
+    for (var j = 0, sr = 0; j < m + r; ++j) {
+      if (j < m) {
+        sr += source.data[i + j * n];
+      }
+      if (j >= r) {
+        if (j >= w) {
+          sr -= source.data[i + (j - w) * n];
+        }
+        target.data[i + (j - r) * n] = sr / Math.min(j + 1, m - 1 + w - j, w);
+      }
+    }
+  }
+}
+
+function defaultX(d) {
+  return d[0];
+}
+
+function defaultY(d) {
+  return d[1];
+}
+
+function density() {
+  var x = defaultX,
+      y = defaultY,
+      dx = 960,
+      dy = 500,
+      r = 20, // blur radius
+      k = 2, // log2(grid cell size)
+      o = r * 3, // grid offset, to pad for blur
+      n = (dx + o * 2) >> k, // grid width
+      m = (dy + o * 2) >> k, // grid height
+      threshold$$1 = constant$6(20);
+
+  function density(data) {
+    var values0 = new Float32Array(n * m),
+        values1 = new Float32Array(n * m);
+
+    data.forEach(function(d, i, data) {
+      var xi = (x(d, i, data) + o) >> k,
+          yi = (y(d, i, data) + o) >> k;
+      if (xi >= 0 && xi < n && yi >= 0 && yi < m) {
+        ++values0[xi + yi * n];
+      }
+    });
+
+    // TODO Optimize.
+    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);
+    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);
+    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);
+    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);
+    blurX({width: n, height: m, data: values0}, {width: n, height: m, data: values1}, r >> k);
+    blurY({width: n, height: m, data: values1}, {width: n, height: m, data: values0}, r >> k);
+
+    var tz = threshold$$1(values0);
+
+    // Convert number of thresholds into uniform thresholds.
+    if (!Array.isArray(tz)) {
+      var stop = max(values0);
+      tz = tickStep(0, stop, tz);
+      tz = sequence(0, Math.floor(stop / tz) * tz, tz);
+      tz.shift();
+    }
+
+    return contours()
+        .thresholds(tz)
+        .size([n, m])
+      (values0)
+        .map(transform);
+  }
+
+  function transform(geometry) {
+    geometry.value *= Math.pow(2, -2 * k); // Density in points per square pixel.
+    geometry.coordinates.forEach(transformPolygon);
+    return geometry;
+  }
+
+  function transformPolygon(coordinates) {
+    coordinates.forEach(transformRing);
+  }
+
+  function transformRing(coordinates) {
+    coordinates.forEach(transformPoint);
+  }
+
+  // TODO Optimize.
+  function transformPoint(coordinates) {
+    coordinates[0] = coordinates[0] * Math.pow(2, k) - o;
+    coordinates[1] = coordinates[1] * Math.pow(2, k) - o;
+  }
+
+  function resize() {
+    o = r * 3;
+    n = (dx + o * 2) >> k;
+    m = (dy + o * 2) >> k;
+    return density;
+  }
+
+  density.x = function(_) {
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$6(+_), density) : x;
+  };
+
+  density.y = function(_) {
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$6(+_), density) : y;
+  };
+
+  density.size = function(_) {
+    if (!arguments.length) return [dx, dy];
+    var _0 = Math.ceil(_[0]), _1 = Math.ceil(_[1]);
+    if (!(_0 >= 0) && !(_0 >= 0)) throw new Error("invalid size");
+    return dx = _0, dy = _1, resize();
+  };
+
+  density.cellSize = function(_) {
+    if (!arguments.length) return 1 << k;
+    if (!((_ = +_) >= 1)) throw new Error("invalid cell size");
+    return k = Math.floor(Math.log(_) / Math.LN2), resize();
+  };
+
+  density.thresholds = function(_) {
+    return arguments.length ? (threshold$$1 = typeof _ === "function" ? _ : Array.isArray(_) ? constant$6(slice$3.call(_)) : constant$6(_), density) : threshold$$1;
+  };
+
+  density.bandwidth = function(_) {
+    if (!arguments.length) return Math.sqrt(r * (r + 1));
+    if (!((_ = +_) >= 0)) throw new Error("invalid bandwidth");
+    return r = Math.round((Math.sqrt(4 * _ * _ + 1) - 1) / 2), resize();
+  };
+
+  return density;
+}
+
+var EOL = {},
+    EOF = {},
+    QUOTE = 34,
+    NEWLINE = 10,
+    RETURN = 13;
+
+function objectConverter(columns) {
+  return new Function("d", "return {" + columns.map(function(name, i) {
+    return JSON.stringify(name) + ": d[" + i + "]";
+  }).join(",") + "}");
+}
+
+function customConverter(columns, f) {
+  var object = objectConverter(columns);
+  return function(row, i) {
+    return f(object(row), i, columns);
+  };
+}
+
+// Compute unique columns in order of discovery.
+function inferColumns(rows) {
+  var columnSet = Object.create(null),
+      columns = [];
+
+  rows.forEach(function(row) {
+    for (var column in row) {
+      if (!(column in columnSet)) {
+        columns.push(columnSet[column] = column);
+      }
+    }
+  });
+
+  return columns;
+}
+
+function dsvFormat(delimiter) {
+  var reFormat = new RegExp("[\"" + delimiter + "\n\r]"),
+      DELIMITER = delimiter.charCodeAt(0);
+
+  function parse(text, f) {
+    var convert, columns, rows = parseRows(text, function(row, i) {
+      if (convert) return convert(row, i - 1);
+      columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
+    });
+    rows.columns = columns || [];
+    return rows;
+  }
+
+  function parseRows(text, f) {
+    var rows = [], // output rows
+        N = text.length,
+        I = 0, // current character index
+        n = 0, // current line number
+        t, // current token
+        eof = N <= 0, // current token followed by EOF?
+        eol = false; // current token followed by EOL?
+
+    // Strip the trailing newline.
+    if (text.charCodeAt(N - 1) === NEWLINE) --N;
+    if (text.charCodeAt(N - 1) === RETURN) --N;
+
+    function token() {
+      if (eof) return EOF;
+      if (eol) return eol = false, EOL;
+
+      // Unescape quotes.
+      var i, j = I, c;
+      if (text.charCodeAt(j) === QUOTE) {
+        while (I++ < N && text.charCodeAt(I) !== QUOTE || text.charCodeAt(++I) === QUOTE);
+        if ((i = I) >= N) eof = true;
+        else if ((c = text.charCodeAt(I++)) === NEWLINE) eol = true;
+        else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
+        return text.slice(j + 1, i - 1).replace(/""/g, "\"");
+      }
+
+      // Find next delimiter or newline.
+      while (I < N) {
+        if ((c = text.charCodeAt(i = I++)) === NEWLINE) eol = true;
+        else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
+        else if (c !== DELIMITER) continue;
+        return text.slice(j, i);
+      }
+
+      // Return last token before EOF.
+      return eof = true, text.slice(j, N);
+    }
+
+    while ((t = token()) !== EOF) {
+      var row = [];
+      while (t !== EOL && t !== EOF) row.push(t), t = token();
+      if (f && (row = f(row, n++)) == null) continue;
+      rows.push(row);
+    }
+
+    return rows;
+  }
+
+  function format(rows, columns) {
+    if (columns == null) columns = inferColumns(rows);
+    return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) {
+      return columns.map(function(column) {
+        return formatValue(row[column]);
+      }).join(delimiter);
+    })).join("\n");
+  }
+
+  function formatRows(rows) {
+    return rows.map(formatRow).join("\n");
+  }
+
+  function formatRow(row) {
+    return row.map(formatValue).join(delimiter);
+  }
+
+  function formatValue(text) {
+    return text == null ? ""
+        : reFormat.test(text += "") ? "\"" + text.replace(/"/g, "\"\"") + "\""
+        : text;
+  }
+
+  return {
+    parse: parse,
+    parseRows: parseRows,
+    format: format,
+    formatRows: formatRows
+  };
+}
+
+var csv = dsvFormat(",");
+
+var csvParse = csv.parse;
+var csvParseRows = csv.parseRows;
+var csvFormat = csv.format;
+var csvFormatRows = csv.formatRows;
+
+var tsv = dsvFormat("\t");
+
+var tsvParse = tsv.parse;
+var tsvParseRows = tsv.parseRows;
+var tsvFormat = tsv.format;
+var tsvFormatRows = tsv.formatRows;
+
+function responseBlob(response) {
+  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+  return response.blob();
+}
+
+function blob(input, init) {
+  return fetch(input, init).then(responseBlob);
+}
+
+function responseArrayBuffer(response) {
+  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+  return response.arrayBuffer();
+}
+
+function buffer(input, init) {
+  return fetch(input, init).then(responseArrayBuffer);
+}
+
+function responseText(response) {
+  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+  return response.text();
+}
+
+function text(input, init) {
+  return fetch(input, init).then(responseText);
+}
+
+function dsvParse(parse) {
+  return function(input, init, row) {
+    if (arguments.length === 2 && typeof init === "function") row = init, init = undefined;
+    return text(input, init).then(function(response) {
+      return parse(response, row);
+    });
+  };
+}
+
+function dsv(delimiter, input, init, row) {
+  if (arguments.length === 3 && typeof init === "function") row = init, init = undefined;
+  var format = dsvFormat(delimiter);
+  return text(input, init).then(function(response) {
+    return format.parse(response, row);
+  });
+}
+
+var csv$1 = dsvParse(csvParse);
+var tsv$1 = dsvParse(tsvParse);
+
+function image(input, init) {
+  return new Promise(function(resolve, reject) {
+    var image = new Image;
+    for (var key in init) image[key] = init[key];
+    image.onerror = reject;
+    image.onload = function() { resolve(image); };
+    image.src = input;
+  });
+}
+
+function responseJson(response) {
+  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+  return response.json();
+}
+
+function json(input, init) {
+  return fetch(input, init).then(responseJson);
+}
+
+function parser(type) {
+  return function(input, init)  {
+    return text(input, init).then(function(text$$1) {
+      return (new DOMParser).parseFromString(text$$1, type);
+    });
+  };
+}
+
+var xml = parser("application/xml");
+
+var html = parser("text/html");
+
+var svg = parser("image/svg+xml");
+
+function center$1(x, y) {
+  var nodes;
+
+  if (x == null) x = 0;
+  if (y == null) y = 0;
+
+  function force() {
+    var i,
+        n = nodes.length,
+        node,
+        sx = 0,
+        sy = 0;
+
+    for (i = 0; i < n; ++i) {
+      node = nodes[i], sx += node.x, sy += node.y;
+    }
+
+    for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) {
+      node = nodes[i], node.x -= sx, node.y -= sy;
+    }
+  }
+
+  force.initialize = function(_) {
+    nodes = _;
+  };
+
+  force.x = function(_) {
+    return arguments.length ? (x = +_, force) : x;
+  };
+
+  force.y = function(_) {
+    return arguments.length ? (y = +_, force) : y;
+  };
+
+  return force;
+}
+
+function constant$7(x) {
+  return function() {
+    return x;
+  };
+}
+
+function jiggle() {
+  return (Math.random() - 0.5) * 1e-6;
+}
+
+function tree_add(d) {
+  var x = +this._x.call(null, d),
+      y = +this._y.call(null, d);
+  return add(this.cover(x, y), x, y, d);
+}
+
+function add(tree, x, y, d) {
+  if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points
+
+  var parent,
+      node = tree._root,
+      leaf = {data: d},
+      x0 = tree._x0,
+      y0 = tree._y0,
+      x1 = tree._x1,
+      y1 = tree._y1,
+      xm,
+      ym,
+      xp,
+      yp,
+      right,
+      bottom,
+      i,
+      j;
+
+  // If the tree is empty, initialize the root as a leaf.
+  if (!node) return tree._root = leaf, tree;
+
+  // Find the existing leaf for the new point, or add it.
+  while (node.length) {
+    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+    if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
+  }
+
+  // Is the new point is exactly coincident with the existing point?
+  xp = +tree._x.call(null, node.data);
+  yp = +tree._y.call(null, node.data);
+  if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;
+
+  // Otherwise, split the leaf node until the old and new point are separated.
+  do {
+    parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
+    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+  } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
+  return parent[j] = node, parent[i] = leaf, tree;
+}
+
+function addAll(data) {
+  var d, i, n = data.length,
+      x,
+      y,
+      xz = new Array(n),
+      yz = new Array(n),
+      x0 = Infinity,
+      y0 = Infinity,
+      x1 = -Infinity,
+      y1 = -Infinity;
+
+  // Compute the points and their extent.
+  for (i = 0; i < n; ++i) {
+    if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
+    xz[i] = x;
+    yz[i] = y;
+    if (x < x0) x0 = x;
+    if (x > x1) x1 = x;
+    if (y < y0) y0 = y;
+    if (y > y1) y1 = y;
+  }
+
+  // If there were no (valid) points, inherit the existing extent.
+  if (x1 < x0) x0 = this._x0, x1 = this._x1;
+  if (y1 < y0) y0 = this._y0, y1 = this._y1;
+
+  // Expand the tree to cover the new points.
+  this.cover(x0, y0).cover(x1, y1);
+
+  // Add the new points.
+  for (i = 0; i < n; ++i) {
+    add(this, xz[i], yz[i], data[i]);
+  }
+
+  return this;
+}
+
+function tree_cover(x, y) {
+  if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points
+
+  var x0 = this._x0,
+      y0 = this._y0,
+      x1 = this._x1,
+      y1 = this._y1;
+
+  // If the quadtree has no extent, initialize them.
+  // Integer extent are necessary so that if we later double the extent,
+  // the existing quadrant boundaries don’t change due to floating point error!
+  if (isNaN(x0)) {
+    x1 = (x0 = Math.floor(x)) + 1;
+    y1 = (y0 = Math.floor(y)) + 1;
+  }
+
+  // Otherwise, double repeatedly to cover.
+  else if (x0 > x || x > x1 || y0 > y || y > y1) {
+    var z = x1 - x0,
+        node = this._root,
+        parent,
+        i;
+
+    switch (i = (y < (y0 + y1) / 2) << 1 | (x < (x0 + x1) / 2)) {
+      case 0: {
+        do parent = new Array(4), parent[i] = node, node = parent;
+        while (z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1);
+        break;
+      }
+      case 1: {
+        do parent = new Array(4), parent[i] = node, node = parent;
+        while (z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1);
+        break;
+      }
+      case 2: {
+        do parent = new Array(4), parent[i] = node, node = parent;
+        while (z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y);
+        break;
+      }
+      case 3: {
+        do parent = new Array(4), parent[i] = node, node = parent;
+        while (z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y);
+        break;
+      }
+    }
+
+    if (this._root && this._root.length) this._root = node;
+  }
+
+  // If the quadtree covers the point already, just return.
+  else return this;
+
+  this._x0 = x0;
+  this._y0 = y0;
+  this._x1 = x1;
+  this._y1 = y1;
+  return this;
+}
+
+function tree_data() {
+  var data = [];
+  this.visit(function(node) {
+    if (!node.length) do data.push(node.data); while (node = node.next)
+  });
+  return data;
+}
+
+function tree_extent(_) {
+  return arguments.length
+      ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
+      : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
+}
+
+function Quad(node, x0, y0, x1, y1) {
+  this.node = node;
+  this.x0 = x0;
+  this.y0 = y0;
+  this.x1 = x1;
+  this.y1 = y1;
+}
+
+function tree_find(x, y, radius) {
+  var data,
+      x0 = this._x0,
+      y0 = this._y0,
+      x1,
+      y1,
+      x2,
+      y2,
+      x3 = this._x1,
+      y3 = this._y1,
+      quads = [],
+      node = this._root,
+      q,
+      i;
+
+  if (node) quads.push(new Quad(node, x0, y0, x3, y3));
+  if (radius == null) radius = Infinity;
+  else {
+    x0 = x - radius, y0 = y - radius;
+    x3 = x + radius, y3 = y + radius;
+    radius *= radius;
+  }
+
+  while (q = quads.pop()) {
+
+    // Stop searching if this quadrant can’t contain a closer node.
+    if (!(node = q.node)
+        || (x1 = q.x0) > x3
+        || (y1 = q.y0) > y3
+        || (x2 = q.x1) < x0
+        || (y2 = q.y1) < y0) continue;
+
+    // Bisect the current quadrant.
+    if (node.length) {
+      var xm = (x1 + x2) / 2,
+          ym = (y1 + y2) / 2;
+
+      quads.push(
+        new Quad(node[3], xm, ym, x2, y2),
+        new Quad(node[2], x1, ym, xm, y2),
+        new Quad(node[1], xm, y1, x2, ym),
+        new Quad(node[0], x1, y1, xm, ym)
+      );
+
+      // Visit the closest quadrant first.
+      if (i = (y >= ym) << 1 | (x >= xm)) {
+        q = quads[quads.length - 1];
+        quads[quads.length - 1] = quads[quads.length - 1 - i];
+        quads[quads.length - 1 - i] = q;
+      }
+    }
+
+    // Visit this point. (Visiting coincident points isn’t necessary!)
+    else {
+      var dx = x - +this._x.call(null, node.data),
+          dy = y - +this._y.call(null, node.data),
+          d2 = dx * dx + dy * dy;
+      if (d2 < radius) {
+        var d = Math.sqrt(radius = d2);
+        x0 = x - d, y0 = y - d;
+        x3 = x + d, y3 = y + d;
+        data = node.data;
+      }
+    }
+  }
+
+  return data;
+}
+
+function tree_remove(d) {
+  if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points
+
+  var parent,
+      node = this._root,
+      retainer,
+      previous,
+      next,
+      x0 = this._x0,
+      y0 = this._y0,
+      x1 = this._x1,
+      y1 = this._y1,
+      x,
+      y,
+      xm,
+      ym,
+      right,
+      bottom,
+      i,
+      j;
+
+  // If the tree is empty, initialize the root as a leaf.
+  if (!node) return this;
+
+  // Find the leaf node for the point.
+  // While descending, also retain the deepest parent with a non-removed sibling.
+  if (node.length) while (true) {
+    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+    if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
+    if (!node.length) break;
+    if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
+  }
+
+  // Find the point to remove.
+  while (node.data !== d) if (!(previous = node, node = node.next)) return this;
+  if (next = node.next) delete node.next;
+
+  // If there are multiple coincident points, remove just the point.
+  if (previous) return next ? previous.next = next : delete previous.next, this;
+
+  // If this is the root point, remove it.
+  if (!parent) return this._root = next, this;
+
+  // Remove this leaf.
+  next ? parent[i] = next : delete parent[i];
+
+  // If the parent now contains exactly one leaf, collapse superfluous parents.
+  if ((node = parent[0] || parent[1] || parent[2] || parent[3])
+      && node === (parent[3] || parent[2] || parent[1] || parent[0])
+      && !node.length) {
+    if (retainer) retainer[j] = node;
+    else this._root = node;
+  }
+
+  return this;
+}
+
+function removeAll(data) {
+  for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
+  return this;
+}
+
+function tree_root() {
+  return this._root;
+}
+
+function tree_size() {
+  var size = 0;
+  this.visit(function(node) {
+    if (!node.length) do ++size; while (node = node.next)
+  });
+  return size;
+}
+
+function tree_visit(callback) {
+  var quads = [], q, node = this._root, child, x0, y0, x1, y1;
+  if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
+  while (q = quads.pop()) {
+    if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
+      var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+    }
+  }
+  return this;
+}
+
+function tree_visitAfter(callback) {
+  var quads = [], next = [], q;
+  if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
+  while (q = quads.pop()) {
+    var node = q.node;
+    if (node.length) {
+      var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+    }
+    next.push(q);
+  }
+  while (q = next.pop()) {
+    callback(q.node, q.x0, q.y0, q.x1, q.y1);
+  }
+  return this;
+}
+
+function defaultX$1(d) {
+  return d[0];
+}
+
+function tree_x(_) {
+  return arguments.length ? (this._x = _, this) : this._x;
+}
+
+function defaultY$1(d) {
+  return d[1];
+}
+
+function tree_y(_) {
+  return arguments.length ? (this._y = _, this) : this._y;
+}
+
+function quadtree(nodes, x, y) {
+  var tree = new Quadtree(x == null ? defaultX$1 : x, y == null ? defaultY$1 : y, NaN, NaN, NaN, NaN);
+  return nodes == null ? tree : tree.addAll(nodes);
+}
+
+function Quadtree(x, y, x0, y0, x1, y1) {
+  this._x = x;
+  this._y = y;
+  this._x0 = x0;
+  this._y0 = y0;
+  this._x1 = x1;
+  this._y1 = y1;
+  this._root = undefined;
+}
+
+function leaf_copy(leaf) {
+  var copy = {data: leaf.data}, next = copy;
+  while (leaf = leaf.next) next = next.next = {data: leaf.data};
+  return copy;
+}
+
+var treeProto = quadtree.prototype = Quadtree.prototype;
+
+treeProto.copy = function() {
+  var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
+      node = this._root,
+      nodes,
+      child;
+
+  if (!node) return copy;
+
+  if (!node.length) return copy._root = leaf_copy(node), copy;
+
+  nodes = [{source: node, target: copy._root = new Array(4)}];
+  while (node = nodes.pop()) {
+    for (var i = 0; i < 4; ++i) {
+      if (child = node.source[i]) {
+        if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});
+        else node.target[i] = leaf_copy(child);
+      }
+    }
+  }
+
+  return copy;
+};
+
+treeProto.add = tree_add;
+treeProto.addAll = addAll;
+treeProto.cover = tree_cover;
+treeProto.data = tree_data;
+treeProto.extent = tree_extent;
+treeProto.find = tree_find;
+treeProto.remove = tree_remove;
+treeProto.removeAll = removeAll;
+treeProto.root = tree_root;
+treeProto.size = tree_size;
+treeProto.visit = tree_visit;
+treeProto.visitAfter = tree_visitAfter;
+treeProto.x = tree_x;
+treeProto.y = tree_y;
+
+function x(d) {
+  return d.x + d.vx;
+}
+
+function y(d) {
+  return d.y + d.vy;
+}
+
+function collide(radius) {
+  var nodes,
+      radii,
+      strength = 1,
+      iterations = 1;
+
+  if (typeof radius !== "function") radius = constant$7(radius == null ? 1 : +radius);
+
+  function force() {
+    var i, n = nodes.length,
+        tree,
+        node,
+        xi,
+        yi,
+        ri,
+        ri2;
+
+    for (var k = 0; k < iterations; ++k) {
+      tree = quadtree(nodes, x, y).visitAfter(prepare);
+      for (i = 0; i < n; ++i) {
+        node = nodes[i];
+        ri = radii[node.index], ri2 = ri * ri;
+        xi = node.x + node.vx;
+        yi = node.y + node.vy;
+        tree.visit(apply);
+      }
+    }
+
+    function apply(quad, x0, y0, x1, y1) {
+      var data = quad.data, rj = quad.r, r = ri + rj;
+      if (data) {
+        if (data.index > node.index) {
+          var x = xi - data.x - data.vx,
+              y = yi - data.y - data.vy,
+              l = x * x + y * y;
+          if (l < r * r) {
+            if (x === 0) x = jiggle(), l += x * x;
+            if (y === 0) y = jiggle(), l += y * y;
+            l = (r - (l = Math.sqrt(l))) / l * strength;
+            node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));
+            node.vy += (y *= l) * r;
+            data.vx -= x * (r = 1 - r);
+            data.vy -= y * r;
+          }
+        }
+        return;
+      }
+      return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;
+    }
+  }
+
+  function prepare(quad) {
+    if (quad.data) return quad.r = radii[quad.data.index];
+    for (var i = quad.r = 0; i < 4; ++i) {
+      if (quad[i] && quad[i].r > quad.r) {
+        quad.r = quad[i].r;
+      }
+    }
+  }
+
+  function initialize() {
+    if (!nodes) return;
+    var i, n = nodes.length, node;
+    radii = new Array(n);
+    for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);
+  }
+
+  force.initialize = function(_) {
+    nodes = _;
+    initialize();
+  };
+
+  force.iterations = function(_) {
+    return arguments.length ? (iterations = +_, force) : iterations;
+  };
+
+  force.strength = function(_) {
+    return arguments.length ? (strength = +_, force) : strength;
+  };
+
+  force.radius = function(_) {
+    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : radius;
+  };
+
+  return force;
+}
+
+function index(d) {
+  return d.index;
+}
+
+function find(nodeById, nodeId) {
+  var node = nodeById.get(nodeId);
+  if (!node) throw new Error("missing: " + nodeId);
+  return node;
+}
+
+function link(links) {
+  var id = index,
+      strength = defaultStrength,
+      strengths,
+      distance = constant$7(30),
+      distances,
+      nodes,
+      count,
+      bias,
+      iterations = 1;
+
+  if (links == null) links = [];
+
+  function defaultStrength(link) {
+    return 1 / Math.min(count[link.source.index], count[link.target.index]);
+  }
+
+  function force(alpha) {
+    for (var k = 0, n = links.length; k < iterations; ++k) {
+      for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
+        link = links[i], source = link.source, target = link.target;
+        x = target.x + target.vx - source.x - source.vx || jiggle();
+        y = target.y + target.vy - source.y - source.vy || jiggle();
+        l = Math.sqrt(x * x + y * y);
+        l = (l - distances[i]) / l * alpha * strengths[i];
+        x *= l, y *= l;
+        target.vx -= x * (b = bias[i]);
+        target.vy -= y * b;
+        source.vx += x * (b = 1 - b);
+        source.vy += y * b;
+      }
+    }
+  }
+
+  function initialize() {
+    if (!nodes) return;
+
+    var i,
+        n = nodes.length,
+        m = links.length,
+        nodeById = map$1(nodes, id),
+        link;
+
+    for (i = 0, count = new Array(n); i < m; ++i) {
+      link = links[i], link.index = i;
+      if (typeof link.source !== "object") link.source = find(nodeById, link.source);
+      if (typeof link.target !== "object") link.target = find(nodeById, link.target);
+      count[link.source.index] = (count[link.source.index] || 0) + 1;
+      count[link.target.index] = (count[link.target.index] || 0) + 1;
+    }
+
+    for (i = 0, bias = new Array(m); i < m; ++i) {
+      link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
+    }
+
+    strengths = new Array(m), initializeStrength();
+    distances = new Array(m), initializeDistance();
+  }
+
+  function initializeStrength() {
+    if (!nodes) return;
+
+    for (var i = 0, n = links.length; i < n; ++i) {
+      strengths[i] = +strength(links[i], i, links);
+    }
+  }
+
+  function initializeDistance() {
+    if (!nodes) return;
+
+    for (var i = 0, n = links.length; i < n; ++i) {
+      distances[i] = +distance(links[i], i, links);
+    }
+  }
+
+  force.initialize = function(_) {
+    nodes = _;
+    initialize();
+  };
+
+  force.links = function(_) {
+    return arguments.length ? (links = _, initialize(), force) : links;
+  };
+
+  force.id = function(_) {
+    return arguments.length ? (id = _, force) : id;
+  };
+
+  force.iterations = function(_) {
+    return arguments.length ? (iterations = +_, force) : iterations;
+  };
+
+  force.strength = function(_) {
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initializeStrength(), force) : strength;
+  };
+
+  force.distance = function(_) {
+    return arguments.length ? (distance = typeof _ === "function" ? _ : constant$7(+_), initializeDistance(), force) : distance;
+  };
+
+  return force;
+}
+
+function x$1(d) {
+  return d.x;
+}
+
+function y$1(d) {
+  return d.y;
+}
+
+var initialRadius = 10,
+    initialAngle = Math.PI * (3 - Math.sqrt(5));
+
+function simulation(nodes) {
+  var simulation,
+      alpha = 1,
+      alphaMin = 0.001,
+      alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
+      alphaTarget = 0,
+      velocityDecay = 0.6,
+      forces = map$1(),
+      stepper = timer(step),
+      event = dispatch("tick", "end");
+
+  if (nodes == null) nodes = [];
+
+  function step() {
+    tick();
+    event.call("tick", simulation);
+    if (alpha < alphaMin) {
+      stepper.stop();
+      event.call("end", simulation);
+    }
+  }
+
+  function tick() {
+    var i, n = nodes.length, node;
+
+    alpha += (alphaTarget - alpha) * alphaDecay;
+
+    forces.each(function(force) {
+      force(alpha);
+    });
+
+    for (i = 0; i < n; ++i) {
+      node = nodes[i];
+      if (node.fx == null) node.x += node.vx *= velocityDecay;
+      else node.x = node.fx, node.vx = 0;
+      if (node.fy == null) node.y += node.vy *= velocityDecay;
+      else node.y = node.fy, node.vy = 0;
+    }
+  }
+
+  function initializeNodes() {
+    for (var i = 0, n = nodes.length, node; i < n; ++i) {
+      node = nodes[i], node.index = i;
+      if (isNaN(node.x) || isNaN(node.y)) {
+        var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;
+        node.x = radius * Math.cos(angle);
+        node.y = radius * Math.sin(angle);
+      }
+      if (isNaN(node.vx) || isNaN(node.vy)) {
+        node.vx = node.vy = 0;
+      }
+    }
+  }
+
+  function initializeForce(force) {
+    if (force.initialize) force.initialize(nodes);
+    return force;
+  }
+
+  initializeNodes();
+
+  return simulation = {
+    tick: tick,
+
+    restart: function() {
+      return stepper.restart(step), simulation;
+    },
+
+    stop: function() {
+      return stepper.stop(), simulation;
+    },
+
+    nodes: function(_) {
+      return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes;
+    },
+
+    alpha: function(_) {
+      return arguments.length ? (alpha = +_, simulation) : alpha;
+    },
+
+    alphaMin: function(_) {
+      return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
+    },
+
+    alphaDecay: function(_) {
+      return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
+    },
+
+    alphaTarget: function(_) {
+      return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
+    },
+
+    velocityDecay: function(_) {
+      return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
+    },
+
+    force: function(name, _) {
+      return arguments.length > 1 ? (_ == null ? forces.remove(name) : forces.set(name, initializeForce(_)), simulation) : forces.get(name);
+    },
+
+    find: function(x, y, radius) {
+      var i = 0,
+          n = nodes.length,
+          dx,
+          dy,
+          d2,
+          node,
+          closest;
+
+      if (radius == null) radius = Infinity;
+      else radius *= radius;
+
+      for (i = 0; i < n; ++i) {
+        node = nodes[i];
+        dx = x - node.x;
+        dy = y - node.y;
+        d2 = dx * dx + dy * dy;
+        if (d2 < radius) closest = node, radius = d2;
+      }
+
+      return closest;
+    },
+
+    on: function(name, _) {
+      return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
+    }
+  };
+}
+
+function manyBody() {
+  var nodes,
+      node,
+      alpha,
+      strength = constant$7(-30),
+      strengths,
+      distanceMin2 = 1,
+      distanceMax2 = Infinity,
+      theta2 = 0.81;
+
+  function force(_) {
+    var i, n = nodes.length, tree = quadtree(nodes, x$1, y$1).visitAfter(accumulate);
+    for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
+  }
+
+  function initialize() {
+    if (!nodes) return;
+    var i, n = nodes.length, node;
+    strengths = new Array(n);
+    for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);
+  }
+
+  function accumulate(quad) {
+    var strength = 0, q, c, weight = 0, x, y, i;
+
+    // For internal nodes, accumulate forces from child quadrants.
+    if (quad.length) {
+      for (x = y = i = 0; i < 4; ++i) {
+        if ((q = quad[i]) && (c = Math.abs(q.value))) {
+          strength += q.value, weight += c, x += c * q.x, y += c * q.y;
+        }
+      }
+      quad.x = x / weight;
+      quad.y = y / weight;
+    }
+
+    // For leaf nodes, accumulate forces from coincident quadrants.
+    else {
+      q = quad;
+      q.x = q.data.x;
+      q.y = q.data.y;
+      do strength += strengths[q.data.index];
+      while (q = q.next);
+    }
+
+    quad.value = strength;
+  }
+
+  function apply(quad, x1, _, x2) {
+    if (!quad.value) return true;
+
+    var x = quad.x - node.x,
+        y = quad.y - node.y,
+        w = x2 - x1,
+        l = x * x + y * y;
+
+    // Apply the Barnes-Hut approximation if possible.
+    // Limit forces for very close nodes; randomize direction if coincident.
+    if (w * w / theta2 < l) {
+      if (l < distanceMax2) {
+        if (x === 0) x = jiggle(), l += x * x;
+        if (y === 0) y = jiggle(), l += y * y;
+        if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
+        node.vx += x * quad.value * alpha / l;
+        node.vy += y * quad.value * alpha / l;
+      }
+      return true;
+    }
+
+    // Otherwise, process points directly.
+    else if (quad.length || l >= distanceMax2) return;
+
+    // Limit forces for very close nodes; randomize direction if coincident.
+    if (quad.data !== node || quad.next) {
+      if (x === 0) x = jiggle(), l += x * x;
+      if (y === 0) y = jiggle(), l += y * y;
+      if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
+    }
+
+    do if (quad.data !== node) {
+      w = strengths[quad.data.index] * alpha / l;
+      node.vx += x * w;
+      node.vy += y * w;
+    } while (quad = quad.next);
+  }
+
+  force.initialize = function(_) {
+    nodes = _;
+    initialize();
+  };
+
+  force.strength = function(_) {
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength;
+  };
+
+  force.distanceMin = function(_) {
+    return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
+  };
+
+  force.distanceMax = function(_) {
+    return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
+  };
+
+  force.theta = function(_) {
+    return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
+  };
+
+  return force;
+}
+
+function radial(radius, x, y) {
+  var nodes,
+      strength = constant$7(0.1),
+      strengths,
+      radiuses;
+
+  if (typeof radius !== "function") radius = constant$7(+radius);
+  if (x == null) x = 0;
+  if (y == null) y = 0;
+
+  function force(alpha) {
+    for (var i = 0, n = nodes.length; i < n; ++i) {
+      var node = nodes[i],
+          dx = node.x - x || 1e-6,
+          dy = node.y - y || 1e-6,
+          r = Math.sqrt(dx * dx + dy * dy),
+          k = (radiuses[i] - r) * strengths[i] * alpha / r;
+      node.vx += dx * k;
+      node.vy += dy * k;
+    }
+  }
+
+  function initialize() {
+    if (!nodes) return;
+    var i, n = nodes.length;
+    strengths = new Array(n);
+    radiuses = new Array(n);
+    for (i = 0; i < n; ++i) {
+      radiuses[i] = +radius(nodes[i], i, nodes);
+      strengths[i] = isNaN(radiuses[i]) ? 0 : +strength(nodes[i], i, nodes);
+    }
+  }
+
+  force.initialize = function(_) {
+    nodes = _, initialize();
+  };
+
+  force.strength = function(_) {
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength;
+  };
+
+  force.radius = function(_) {
+    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : radius;
+  };
+
+  force.x = function(_) {
+    return arguments.length ? (x = +_, force) : x;
+  };
+
+  force.y = function(_) {
+    return arguments.length ? (y = +_, force) : y;
+  };
+
+  return force;
+}
+
+function x$2(x) {
+  var strength = constant$7(0.1),
+      nodes,
+      strengths,
+      xz;
+
+  if (typeof x !== "function") x = constant$7(x == null ? 0 : +x);
+
+  function force(alpha) {
+    for (var i = 0, n = nodes.length, node; i < n; ++i) {
+      node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;
+    }
+  }
+
+  function initialize() {
+    if (!nodes) return;
+    var i, n = nodes.length;
+    strengths = new Array(n);
+    xz = new Array(n);
+    for (i = 0; i < n; ++i) {
+      strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
+    }
+  }
+
+  force.initialize = function(_) {
+    nodes = _;
+    initialize();
+  };
+
+  force.strength = function(_) {
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength;
+  };
+
+  force.x = function(_) {
+    return arguments.length ? (x = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : x;
+  };
+
+  return force;
+}
+
+function y$2(y) {
+  var strength = constant$7(0.1),
+      nodes,
+      strengths,
+      yz;
+
+  if (typeof y !== "function") y = constant$7(y == null ? 0 : +y);
+
+  function force(alpha) {
+    for (var i = 0, n = nodes.length, node; i < n; ++i) {
+      node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;
+    }
+  }
+
+  function initialize() {
+    if (!nodes) return;
+    var i, n = nodes.length;
+    strengths = new Array(n);
+    yz = new Array(n);
+    for (i = 0; i < n; ++i) {
+      strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
+    }
+  }
+
+  force.initialize = function(_) {
+    nodes = _;
+    initialize();
+  };
+
+  force.strength = function(_) {
+    return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength;
+  };
+
+  force.y = function(_) {
+    return arguments.length ? (y = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : y;
+  };
+
+  return force;
+}
+
+// Computes the decimal coefficient and exponent of the specified number x with
+// significant digits p, where x is positive and p is in [1, 21] or undefined.
+// For example, formatDecimal(1.23) returns ["123", 0].
+function formatDecimal(x, p) {
+  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+  var i, coefficient = x.slice(0, i);
+
+  // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
+  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
+  return [
+    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
+    +x.slice(i + 1)
+  ];
+}
+
+function exponent$1(x) {
+  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
+}
+
+function formatGroup(grouping, thousands) {
+  return function(value, width) {
+    var i = value.length,
+        t = [],
+        j = 0,
+        g = grouping[0],
+        length = 0;
+
+    while (i > 0 && g > 0) {
+      if (length + g + 1 > width) g = Math.max(1, width - length);
+      t.push(value.substring(i -= g, i + g));
+      if ((length += g + 1) > width) break;
+      g = grouping[j = (j + 1) % grouping.length];
+    }
+
+    return t.reverse().join(thousands);
+  };
+}
+
+function formatNumerals(numerals) {
+  return function(value) {
+    return value.replace(/[0-9]/g, function(i) {
+      return numerals[+i];
+    });
+  };
+}
+
+// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+
+function formatSpecifier(specifier) {
+  return new FormatSpecifier(specifier);
+}
+
+formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
+
+function FormatSpecifier(specifier) {
+  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+  var match;
+  this.fill = match[1] || " ";
+  this.align = match[2] || ">";
+  this.sign = match[3] || "-";
+  this.symbol = match[4] || "";
+  this.zero = !!match[5];
+  this.width = match[6] && +match[6];
+  this.comma = !!match[7];
+  this.precision = match[8] && +match[8].slice(1);
+  this.trim = !!match[9];
+  this.type = match[10] || "";
+}
+
+FormatSpecifier.prototype.toString = function() {
+  return this.fill
+      + this.align
+      + this.sign
+      + this.symbol
+      + (this.zero ? "0" : "")
+      + (this.width == null ? "" : Math.max(1, this.width | 0))
+      + (this.comma ? "," : "")
+      + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
+      + (this.trim ? "~" : "")
+      + this.type;
+};
+
+// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
+function formatTrim(s) {
+  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
+    switch (s[i]) {
+      case ".": i0 = i1 = i; break;
+      case "0": if (i0 === 0) i0 = i; i1 = i; break;
+      default: if (i0 > 0) { if (!+s[i]) break out; i0 = 0; } break;
+    }
+  }
+  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+}
+
+var prefixExponent;
+
+function formatPrefixAuto(x, p) {
+  var d = formatDecimal(x, p);
+  if (!d) return x + "";
+  var coefficient = d[0],
+      exponent = d[1],
+      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
+      n = coefficient.length;
+  return i === n ? coefficient
+      : i > n ? coefficient + new Array(i - n + 1).join("0")
+      : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
+      : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
+}
+
+function formatRounded(x, p) {
+  var d = formatDecimal(x, p);
+  if (!d) return x + "";
+  var coefficient = d[0],
+      exponent = d[1];
+  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
+      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
+      : coefficient + new Array(exponent - coefficient.length + 2).join("0");
+}
+
+var formatTypes = {
+  "%": function(x, p) { return (x * 100).toFixed(p); },
+  "b": function(x) { return Math.round(x).toString(2); },
+  "c": function(x) { return x + ""; },
+  "d": function(x) { return Math.round(x).toString(10); },
+  "e": function(x, p) { return x.toExponential(p); },
+  "f": function(x, p) { return x.toFixed(p); },
+  "g": function(x, p) { return x.toPrecision(p); },
+  "o": function(x) { return Math.round(x).toString(8); },
+  "p": function(x, p) { return formatRounded(x * 100, p); },
+  "r": formatRounded,
+  "s": formatPrefixAuto,
+  "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
+  "x": function(x) { return Math.round(x).toString(16); }
+};
+
+function identity$3(x) {
+  return x;
+}
+
+var prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"];
+
+function formatLocale(locale) {
+  var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
+      currency = locale.currency,
+      decimal = locale.decimal,
+      numerals = locale.numerals ? formatNumerals(locale.numerals) : identity$3,
+      percent = locale.percent || "%";
+
+  function newFormat(specifier) {
+    specifier = formatSpecifier(specifier);
+
+    var fill = specifier.fill,
+        align = specifier.align,
+        sign = specifier.sign,
+        symbol = specifier.symbol,
+        zero = specifier.zero,
+        width = specifier.width,
+        comma = specifier.comma,
+        precision = specifier.precision,
+        trim = specifier.trim,
+        type = specifier.type;
+
+    // The "n" type is an alias for ",g".
+    if (type === "n") comma = true, type = "g";
+
+    // The "" type, and any invalid type, is an alias for ".12~g".
+    else if (!formatTypes[type]) precision == null && (precision = 12), trim = true, type = "g";
+
+    // If zero fill is specified, padding goes after sign and before digits.
+    if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
+
+    // Compute the prefix and suffix.
+    // For SI-prefix, the suffix is lazily computed.
+    var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+        suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? percent : "";
+
+    // What format function should we use?
+    // Is this an integer type?
+    // Can this type generate exponential notation?
+    var formatType = formatTypes[type],
+        maybeSuffix = /[defgprs%]/.test(type);
+
+    // Set the default precision if not specified,
+    // or clamp the specified precision to the supported range.
+    // For significant precision, it must be in [1, 21].
+    // For fixed precision, it must be in [0, 20].
+    precision = precision == null ? 6
+        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
+        : Math.max(0, Math.min(20, precision));
+
+    function format(value) {
+      var valuePrefix = prefix,
+          valueSuffix = suffix,
+          i, n, c;
+
+      if (type === "c") {
+        valueSuffix = formatType(value) + valueSuffix;
+        value = "";
+      } else {
+        value = +value;
+
+        // Perform the initial formatting.
+        var valueNegative = value < 0;
+        value = formatType(Math.abs(value), precision);
+
+        // Trim insignificant zeros.
+        if (trim) value = formatTrim(value);
+
+        // If a negative value rounds to zero during formatting, treat as positive.
+        if (valueNegative && +value === 0) valueNegative = false;
+
+        // Compute the prefix and suffix.
+        valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+        valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
+
+        // Break the formatted value into the integer “value” part that can be
+        // grouped, and fractional or exponential “suffix” part that is not.
+        if (maybeSuffix) {
+          i = -1, n = value.length;
+          while (++i < n) {
+            if (c = value.charCodeAt(i), 48 > c || c > 57) {
+              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+              value = value.slice(0, i);
+              break;
+            }
+          }
+        }
+      }
+
+      // If the fill character is not "0", grouping is applied before padding.
+      if (comma && !zero) value = group(value, Infinity);
+
+      // Compute the padding.
+      var length = valuePrefix.length + value.length + valueSuffix.length,
+          padding = length < width ? new Array(width - length + 1).join(fill) : "";
+
+      // If the fill character is "0", grouping is applied after padding.
+      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";
+
+      // Reconstruct the final output based on the desired alignment.
+      switch (align) {
+        case "<": value = valuePrefix + value + valueSuffix + padding; break;
+        case "=": value = valuePrefix + padding + value + valueSuffix; break;
+        case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
+        default: value = padding + valuePrefix + value + valueSuffix; break;
+      }
+
+      return numerals(value);
+    }
+
+    format.toString = function() {
+      return specifier + "";
+    };
+
+    return format;
+  }
+
+  function formatPrefix(specifier, value) {
+    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
+        e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3,
+        k = Math.pow(10, -e),
+        prefix = prefixes[8 + e / 3];
+    return function(value) {
+      return f(k * value) + prefix;
+    };
+  }
+
+  return {
+    format: newFormat,
+    formatPrefix: formatPrefix
+  };
+}
+
+var locale;
+
+defaultLocale({
+  decimal: ".",
+  thousands: ",",
+  grouping: [3],
+  currency: ["$", ""]
+});
+
+function defaultLocale(definition) {
+  locale = formatLocale(definition);
+  exports.format = locale.format;
+  exports.formatPrefix = locale.formatPrefix;
+  return locale;
+}
+
+function precisionFixed(step) {
+  return Math.max(0, -exponent$1(Math.abs(step)));
+}
+
+function precisionPrefix(step, value) {
+  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));
+}
+
+function precisionRound(step, max) {
+  step = Math.abs(step), max = Math.abs(max) - step;
+  return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;
+}
+
+// Adds floating point numbers with twice the normal precision.
+// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
+// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
+// 305–363 (1997).
+// Code adapted from GeographicLib by Charles F. F. Karney,
+// http://geographiclib.sourceforge.net/
+
+function adder() {
+  return new Adder;
+}
+
+function Adder() {
+  this.reset();
+}
+
+Adder.prototype = {
+  constructor: Adder,
+  reset: function() {
+    this.s = // rounded value
+    this.t = 0; // exact error
+  },
+  add: function(y) {
+    add$1(temp, y, this.t);
+    add$1(this, temp.s, this.s);
+    if (this.s) this.t += temp.t;
+    else this.s = temp.t;
+  },
+  valueOf: function() {
+    return this.s;
+  }
+};
+
+var temp = new Adder;
+
+function add$1(adder, a, b) {
+  var x = adder.s = a + b,
+      bv = x - a,
+      av = x - bv;
+  adder.t = (a - av) + (b - bv);
+}
+
+var epsilon$2 = 1e-6;
+var epsilon2$1 = 1e-12;
+var pi$3 = Math.PI;
+var halfPi$2 = pi$3 / 2;
+var quarterPi = pi$3 / 4;
+var tau$3 = pi$3 * 2;
+
+var degrees$1 = 180 / pi$3;
+var radians = pi$3 / 180;
+
+var abs = Math.abs;
+var atan = Math.atan;
+var atan2 = Math.atan2;
+var cos$1 = Math.cos;
+var ceil = Math.ceil;
+var exp = Math.exp;
+var log = Math.log;
+var pow = Math.pow;
+var sin$1 = Math.sin;
+var sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
+var sqrt = Math.sqrt;
+var tan = Math.tan;
+
+function acos(x) {
+  return x > 1 ? 0 : x < -1 ? pi$3 : Math.acos(x);
+}
+
+function asin(x) {
+  return x > 1 ? halfPi$2 : x < -1 ? -halfPi$2 : Math.asin(x);
+}
+
+function haversin(x) {
+  return (x = sin$1(x / 2)) * x;
+}
+
+function noop$2() {}
+
+function streamGeometry(geometry, stream) {
+  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
+    streamGeometryType[geometry.type](geometry, stream);
+  }
+}
+
+var streamObjectType = {
+  Feature: function(object, stream) {
+    streamGeometry(object.geometry, stream);
+  },
+  FeatureCollection: function(object, stream) {
+    var features = object.features, i = -1, n = features.length;
+    while (++i < n) streamGeometry(features[i].geometry, stream);
+  }
+};
+
+var streamGeometryType = {
+  Sphere: function(object, stream) {
+    stream.sphere();
+  },
+  Point: function(object, stream) {
+    object = object.coordinates;
+    stream.point(object[0], object[1], object[2]);
+  },
+  MultiPoint: function(object, stream) {
+    var coordinates = object.coordinates, i = -1, n = coordinates.length;
+    while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
+  },
+  LineString: function(object, stream) {
+    streamLine(object.coordinates, stream, 0);
+  },
+  MultiLineString: function(object, stream) {
+    var coordinates = object.coordinates, i = -1, n = coordinates.length;
+    while (++i < n) streamLine(coordinates[i], stream, 0);
+  },
+  Polygon: function(object, stream) {
+    streamPolygon(object.coordinates, stream);
+  },
+  MultiPolygon: function(object, stream) {
+    var coordinates = object.coordinates, i = -1, n = coordinates.length;
+    while (++i < n) streamPolygon(coordinates[i], stream);
+  },
+  GeometryCollection: function(object, stream) {
+    var geometries = object.geometries, i = -1, n = geometries.length;
+    while (++i < n) streamGeometry(geometries[i], stream);
+  }
+};
+
+function streamLine(coordinates, stream, closed) {
+  var i = -1, n = coordinates.length - closed, coordinate;
+  stream.lineStart();
+  while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
+  stream.lineEnd();
+}
+
+function streamPolygon(coordinates, stream) {
+  var i = -1, n = coordinates.length;
+  stream.polygonStart();
+  while (++i < n) streamLine(coordinates[i], stream, 1);
+  stream.polygonEnd();
+}
+
+function geoStream(object, stream) {
+  if (object && streamObjectType.hasOwnProperty(object.type)) {
+    streamObjectType[object.type](object, stream);
+  } else {
+    streamGeometry(object, stream);
+  }
+}
+
+var areaRingSum = adder();
+
+var areaSum = adder(),
+    lambda00,
+    phi00,
+    lambda0,
+    cosPhi0,
+    sinPhi0;
+
+var areaStream = {
+  point: noop$2,
+  lineStart: noop$2,
+  lineEnd: noop$2,
+  polygonStart: function() {
+    areaRingSum.reset();
+    areaStream.lineStart = areaRingStart;
+    areaStream.lineEnd = areaRingEnd;
+  },
+  polygonEnd: function() {
+    var areaRing = +areaRingSum;
+    areaSum.add(areaRing < 0 ? tau$3 + areaRing : areaRing);
+    this.lineStart = this.lineEnd = this.point = noop$2;
+  },
+  sphere: function() {
+    areaSum.add(tau$3);
+  }
+};
+
+function areaRingStart() {
+  areaStream.point = areaPointFirst;
+}
+
+function areaRingEnd() {
+  areaPoint(lambda00, phi00);
+}
+
+function areaPointFirst(lambda, phi) {
+  areaStream.point = areaPoint;
+  lambda00 = lambda, phi00 = phi;
+  lambda *= radians, phi *= radians;
+  lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi);
+}
+
+function areaPoint(lambda, phi) {
+  lambda *= radians, phi *= radians;
+  phi = phi / 2 + quarterPi; // half the angular distance from south pole
+
+  // Spherical excess E for a spherical triangle with vertices: south pole,
+  // previous point, current point.  Uses a formula derived from Cagnoli’s
+  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
+  var dLambda = lambda - lambda0,
+      sdLambda = dLambda >= 0 ? 1 : -1,
+      adLambda = sdLambda * dLambda,
+      cosPhi = cos$1(phi),
+      sinPhi = sin$1(phi),
+      k = sinPhi0 * sinPhi,
+      u = cosPhi0 * cosPhi + k * cos$1(adLambda),
+      v = k * sdLambda * sin$1(adLambda);
+  areaRingSum.add(atan2(v, u));
+
+  // Advance the previous points.
+  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
+}
+
+function area$1(object) {
+  areaSum.reset();
+  geoStream(object, areaStream);
+  return areaSum * 2;
+}
+
+function spherical(cartesian) {
+  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
+}
+
+function cartesian(spherical) {
+  var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi);
+  return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];
+}
+
+function cartesianDot(a, b) {
+  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+}
+
+function cartesianCross(a, b) {
+  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
+}
+
+// TODO return a
+function cartesianAddInPlace(a, b) {
+  a[0] += b[0], a[1] += b[1], a[2] += b[2];
+}
+
+function cartesianScale(vector, k) {
+  return [vector[0] * k, vector[1] * k, vector[2] * k];
+}
+
+// TODO return d
+function cartesianNormalizeInPlace(d) {
+  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
+  d[0] /= l, d[1] /= l, d[2] /= l;
+}
+
+var lambda0$1, phi0, lambda1, phi1, // bounds
+    lambda2, // previous lambda-coordinate
+    lambda00$1, phi00$1, // first point
+    p0, // previous 3D point
+    deltaSum = adder(),
+    ranges,
+    range;
+
+var boundsStream = {
+  point: boundsPoint,
+  lineStart: boundsLineStart,
+  lineEnd: boundsLineEnd,
+  polygonStart: function() {
+    boundsStream.point = boundsRingPoint;
+    boundsStream.lineStart = boundsRingStart;
+    boundsStream.lineEnd = boundsRingEnd;
+    deltaSum.reset();
+    areaStream.polygonStart();
+  },
+  polygonEnd: function() {
+    areaStream.polygonEnd();
+    boundsStream.point = boundsPoint;
+    boundsStream.lineStart = boundsLineStart;
+    boundsStream.lineEnd = boundsLineEnd;
+    if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
+    else if (deltaSum > epsilon$2) phi1 = 90;
+    else if (deltaSum < -epsilon$2) phi0 = -90;
+    range[0] = lambda0$1, range[1] = lambda1;
+  }
+};
+
+function boundsPoint(lambda, phi) {
+  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+  if (phi < phi0) phi0 = phi;
+  if (phi > phi1) phi1 = phi;
+}
+
+function linePoint(lambda, phi) {
+  var p = cartesian([lambda * radians, phi * radians]);
+  if (p0) {
+    var normal = cartesianCross(p0, p),
+        equatorial = [normal[1], -normal[0], 0],
+        inflection = cartesianCross(equatorial, normal);
+    cartesianNormalizeInPlace(inflection);
+    inflection = spherical(inflection);
+    var delta = lambda - lambda2,
+        sign$$1 = delta > 0 ? 1 : -1,
+        lambdai = inflection[0] * degrees$1 * sign$$1,
+        phii,
+        antimeridian = abs(delta) > 180;
+    if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
+      phii = inflection[1] * degrees$1;
+      if (phii > phi1) phi1 = phii;
+    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
+      phii = -inflection[1] * degrees$1;
+      if (phii < phi0) phi0 = phii;
+    } else {
+      if (phi < phi0) phi0 = phi;
+      if (phi > phi1) phi1 = phi;
+    }
+    if (antimeridian) {
+      if (lambda < lambda2) {
+        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+      } else {
+        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+      }
+    } else {
+      if (lambda1 >= lambda0$1) {
+        if (lambda < lambda0$1) lambda0$1 = lambda;
+        if (lambda > lambda1) lambda1 = lambda;
+      } else {
+        if (lambda > lambda2) {
+          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+        } else {
+          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+        }
+      }
+    }
+  } else {
+    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+  }
+  if (phi < phi0) phi0 = phi;
+  if (phi > phi1) phi1 = phi;
+  p0 = p, lambda2 = lambda;
+}
+
+function boundsLineStart() {
+  boundsStream.point = linePoint;
+}
+
+function boundsLineEnd() {
+  range[0] = lambda0$1, range[1] = lambda1;
+  boundsStream.point = boundsPoint;
+  p0 = null;
+}
+
+function boundsRingPoint(lambda, phi) {
+  if (p0) {
+    var delta = lambda - lambda2;
+    deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
+  } else {
+    lambda00$1 = lambda, phi00$1 = phi;
+  }
+  areaStream.point(lambda, phi);
+  linePoint(lambda, phi);
+}
+
+function boundsRingStart() {
+  areaStream.lineStart();
+}
+
+function boundsRingEnd() {
+  boundsRingPoint(lambda00$1, phi00$1);
+  areaStream.lineEnd();
+  if (abs(deltaSum) > epsilon$2) lambda0$1 = -(lambda1 = 180);
+  range[0] = lambda0$1, range[1] = lambda1;
+  p0 = null;
+}
+
+// Finds the left-right distance between two longitudes.
+// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
+// the distance between ±180° to be 360°.
+function angle(lambda0, lambda1) {
+  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
+}
+
+function rangeCompare(a, b) {
+  return a[0] - b[0];
+}
+
+function rangeContains(range, x) {
+  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
+}
+
+function bounds(feature) {
+  var i, n, a, b, merged, deltaMax, delta;
+
+  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
+  ranges = [];
+  geoStream(feature, boundsStream);
+
+  // First, sort ranges by their minimum longitudes.
+  if (n = ranges.length) {
+    ranges.sort(rangeCompare);
+
+    // Then, merge any ranges that overlap.
+    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
+      b = ranges[i];
+      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
+        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
+        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
+      } else {
+        merged.push(a = b);
+      }
+    }
+
+    // Finally, find the largest gap between the merged ranges.
+    // The final bounding box will be the inverse of this gap.
+    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
+      b = merged[i];
+      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
+    }
+  }
+
+  ranges = range = null;
+
+  return lambda0$1 === Infinity || phi0 === Infinity
+      ? [[NaN, NaN], [NaN, NaN]]
+      : [[lambda0$1, phi0], [lambda1, phi1]];
+}
+
+var W0, W1,
+    X0, Y0, Z0,
+    X1, Y1, Z1,
+    X2, Y2, Z2,
+    lambda00$2, phi00$2, // first point
+    x0, y0, z0; // previous point
+
+var centroidStream = {
+  sphere: noop$2,
+  point: centroidPoint,
+  lineStart: centroidLineStart,
+  lineEnd: centroidLineEnd,
+  polygonStart: function() {
+    centroidStream.lineStart = centroidRingStart;
+    centroidStream.lineEnd = centroidRingEnd;
+  },
+  polygonEnd: function() {
+    centroidStream.lineStart = centroidLineStart;
+    centroidStream.lineEnd = centroidLineEnd;
+  }
+};
+
+// Arithmetic mean of Cartesian vectors.
+function centroidPoint(lambda, phi) {
+  lambda *= radians, phi *= radians;
+  var cosPhi = cos$1(phi);
+  centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));
+}
+
+function centroidPointCartesian(x, y, z) {
+  ++W0;
+  X0 += (x - X0) / W0;
+  Y0 += (y - Y0) / W0;
+  Z0 += (z - Z0) / W0;
+}
+
+function centroidLineStart() {
+  centroidStream.point = centroidLinePointFirst;
+}
+
+function centroidLinePointFirst(lambda, phi) {
+  lambda *= radians, phi *= radians;
+  var cosPhi = cos$1(phi);
+  x0 = cosPhi * cos$1(lambda);
+  y0 = cosPhi * sin$1(lambda);
+  z0 = sin$1(phi);
+  centroidStream.point = centroidLinePoint;
+  centroidPointCartesian(x0, y0, z0);
+}
+
+function centroidLinePoint(lambda, phi) {
+  lambda *= radians, phi *= radians;
+  var cosPhi = cos$1(phi),
+      x = cosPhi * cos$1(lambda),
+      y = cosPhi * sin$1(lambda),
+      z = sin$1(phi),
+      w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
+  W1 += w;
+  X1 += w * (x0 + (x0 = x));
+  Y1 += w * (y0 + (y0 = y));
+  Z1 += w * (z0 + (z0 = z));
+  centroidPointCartesian(x0, y0, z0);
+}
+
+function centroidLineEnd() {
+  centroidStream.point = centroidPoint;
+}
+
+// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
+// J. Applied Mechanics 42, 239 (1975).
+function centroidRingStart() {
+  centroidStream.point = centroidRingPointFirst;
+}
+
+function centroidRingEnd() {
+  centroidRingPoint(lambda00$2, phi00$2);
+  centroidStream.point = centroidPoint;
+}
+
+function centroidRingPointFirst(lambda, phi) {
+  lambda00$2 = lambda, phi00$2 = phi;
+  lambda *= radians, phi *= radians;
+  centroidStream.point = centroidRingPoint;
+  var cosPhi = cos$1(phi);
+  x0 = cosPhi * cos$1(lambda);
+  y0 = cosPhi * sin$1(lambda);
+  z0 = sin$1(phi);
+  centroidPointCartesian(x0, y0, z0);
+}
+
+function centroidRingPoint(lambda, phi) {
+  lambda *= radians, phi *= radians;
+  var cosPhi = cos$1(phi),
+      x = cosPhi * cos$1(lambda),
+      y = cosPhi * sin$1(lambda),
+      z = sin$1(phi),
+      cx = y0 * z - z0 * y,
+      cy = z0 * x - x0 * z,
+      cz = x0 * y - y0 * x,
+      m = sqrt(cx * cx + cy * cy + cz * cz),
+      w = asin(m), // line weight = angle
+      v = m && -w / m; // area weight multiplier
+  X2 += v * cx;
+  Y2 += v * cy;
+  Z2 += v * cz;
+  W1 += w;
+  X1 += w * (x0 + (x0 = x));
+  Y1 += w * (y0 + (y0 = y));
+  Z1 += w * (z0 + (z0 = z));
+  centroidPointCartesian(x0, y0, z0);
+}
+
+function centroid(object) {
+  W0 = W1 =
+  X0 = Y0 = Z0 =
+  X1 = Y1 = Z1 =
+  X2 = Y2 = Z2 = 0;
+  geoStream(object, centroidStream);
+
+  var x = X2,
+      y = Y2,
+      z = Z2,
+      m = x * x + y * y + z * z;
+
+  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
+  if (m < epsilon2$1) {
+    x = X1, y = Y1, z = Z1;
+    // If the feature has zero length, fall back to arithmetic mean of point vectors.
+    if (W1 < epsilon$2) x = X0, y = Y0, z = Z0;
+    m = x * x + y * y + z * z;
+    // If the feature still has an undefined ccentroid, then return.
+    if (m < epsilon2$1) return [NaN, NaN];
+  }
+
+  return [atan2(y, x) * degrees$1, asin(z / sqrt(m)) * degrees$1];
+}
+
+function constant$8(x) {
+  return function() {
+    return x;
+  };
+}
+
+function compose(a, b) {
+
+  function compose(x, y) {
+    return x = a(x, y), b(x[0], x[1]);
+  }
+
+  if (a.invert && b.invert) compose.invert = function(x, y) {
+    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
+  };
+
+  return compose;
+}
+
+function rotationIdentity(lambda, phi) {
+  return [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];
+}
+
+rotationIdentity.invert = rotationIdentity;
+
+function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
+  return (deltaLambda %= tau$3) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
+    : rotationLambda(deltaLambda))
+    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
+    : rotationIdentity);
+}
+
+function forwardRotationLambda(deltaLambda) {
+  return function(lambda, phi) {
+    return lambda += deltaLambda, [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];
+  };
+}
+
+function rotationLambda(deltaLambda) {
+  var rotation = forwardRotationLambda(deltaLambda);
+  rotation.invert = forwardRotationLambda(-deltaLambda);
+  return rotation;
+}
+
+function rotationPhiGamma(deltaPhi, deltaGamma) {
+  var cosDeltaPhi = cos$1(deltaPhi),
+      sinDeltaPhi = sin$1(deltaPhi),
+      cosDeltaGamma = cos$1(deltaGamma),
+      sinDeltaGamma = sin$1(deltaGamma);
+
+  function rotation(lambda, phi) {
+    var cosPhi = cos$1(phi),
+        x = cos$1(lambda) * cosPhi,
+        y = sin$1(lambda) * cosPhi,
+        z = sin$1(phi),
+        k = z * cosDeltaPhi + x * sinDeltaPhi;
+    return [
+      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
+      asin(k * cosDeltaGamma + y * sinDeltaGamma)
+    ];
+  }
+
+  rotation.invert = function(lambda, phi) {
+    var cosPhi = cos$1(phi),
+        x = cos$1(lambda) * cosPhi,
+        y = sin$1(lambda) * cosPhi,
+        z = sin$1(phi),
+        k = z * cosDeltaGamma - y * sinDeltaGamma;
+    return [
+      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
+      asin(k * cosDeltaPhi - x * sinDeltaPhi)
+    ];
+  };
+
+  return rotation;
+}
+
+function rotation(rotate) {
+  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
+
+  function forward(coordinates) {
+    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
+    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
+  }
+
+  forward.invert = function(coordinates) {
+    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
+    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
+  };
+
+  return forward;
+}
+
+// Generates a circle centered at [0°, 0°], with a given radius and precision.
+function circleStream(stream, radius, delta, direction, t0, t1) {
+  if (!delta) return;
+  var cosRadius = cos$1(radius),
+      sinRadius = sin$1(radius),
+      step = direction * delta;
+  if (t0 == null) {
+    t0 = radius + direction * tau$3;
+    t1 = radius - step / 2;
+  } else {
+    t0 = circleRadius(cosRadius, t0);
+    t1 = circleRadius(cosRadius, t1);
+    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$3;
+  }
+  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
+    point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);
+    stream.point(point[0], point[1]);
+  }
+}
+
+// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
+function circleRadius(cosRadius, point) {
+  point = cartesian(point), point[0] -= cosRadius;
+  cartesianNormalizeInPlace(point);
+  var radius = acos(-point[1]);
+  return ((-point[2] < 0 ? -radius : radius) + tau$3 - epsilon$2) % tau$3;
+}
+
+function circle() {
+  var center = constant$8([0, 0]),
+      radius = constant$8(90),
+      precision = constant$8(6),
+      ring,
+      rotate,
+      stream = {point: point};
+
+  function point(x, y) {
+    ring.push(x = rotate(x, y));
+    x[0] *= degrees$1, x[1] *= degrees$1;
+  }
+
+  function circle() {
+    var c = center.apply(this, arguments),
+        r = radius.apply(this, arguments) * radians,
+        p = precision.apply(this, arguments) * radians;
+    ring = [];
+    rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
+    circleStream(stream, r, p, 1);
+    c = {type: "Polygon", coordinates: [ring]};
+    ring = rotate = null;
+    return c;
+  }
+
+  circle.center = function(_) {
+    return arguments.length ? (center = typeof _ === "function" ? _ : constant$8([+_[0], +_[1]]), circle) : center;
+  };
+
+  circle.radius = function(_) {
+    return arguments.length ? (radius = typeof _ === "function" ? _ : constant$8(+_), circle) : radius;
+  };
+
+  circle.precision = function(_) {
+    return arguments.length ? (precision = typeof _ === "function" ? _ : constant$8(+_), circle) : precision;
+  };
+
+  return circle;
+}
+
+function clipBuffer() {
+  var lines = [],
+      line;
+  return {
+    point: function(x, y) {
+      line.push([x, y]);
+    },
+    lineStart: function() {
+      lines.push(line = []);
+    },
+    lineEnd: noop$2,
+    rejoin: function() {
+      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
+    },
+    result: function() {
+      var result = lines;
+      lines = [];
+      line = null;
+      return result;
+    }
+  };
+}
+
+function pointEqual(a, b) {
+  return abs(a[0] - b[0]) < epsilon$2 && abs(a[1] - b[1]) < epsilon$2;
+}
+
+function Intersection(point, points, other, entry) {
+  this.x = point;
+  this.z = points;
+  this.o = other; // another intersection
+  this.e = entry; // is an entry?
+  this.v = false; // visited
+  this.n = this.p = null; // next & previous
+}
+
+// A generalized polygon clipping algorithm: given a polygon that has been cut
+// into its visible line segments, and rejoins the segments by interpolating
+// along the clip edge.
+function clipRejoin(segments, compareIntersection, startInside, interpolate, stream) {
+  var subject = [],
+      clip = [],
+      i,
+      n;
+
+  segments.forEach(function(segment) {
+    if ((n = segment.length - 1) <= 0) return;
+    var n, p0 = segment[0], p1 = segment[n], x;
+
+    // If the first and last points of a segment are coincident, then treat as a
+    // closed ring. TODO if all rings are closed, then the winding order of the
+    // exterior ring should be checked.
+    if (pointEqual(p0, p1)) {
+      stream.lineStart();
+      for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
+      stream.lineEnd();
+      return;
+    }
+
+    subject.push(x = new Intersection(p0, segment, null, true));
+    clip.push(x.o = new Intersection(p0, null, x, false));
+    subject.push(x = new Intersection(p1, segment, null, false));
+    clip.push(x.o = new Intersection(p1, null, x, true));
+  });
+
+  if (!subject.length) return;
+
+  clip.sort(compareIntersection);
+  link$1(subject);
+  link$1(clip);
+
+  for (i = 0, n = clip.length; i < n; ++i) {
+    clip[i].e = startInside = !startInside;
+  }
+
+  var start = subject[0],
+      points,
+      point;
+
+  while (1) {
+    // Find first unvisited intersection.
+    var current = start,
+        isSubject = true;
+    while (current.v) if ((current = current.n) === start) return;
+    points = current.z;
+    stream.lineStart();
+    do {
+      current.v = current.o.v = true;
+      if (current.e) {
+        if (isSubject) {
+          for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
+        } else {
+          interpolate(current.x, current.n.x, 1, stream);
+        }
+        current = current.n;
+      } else {
+        if (isSubject) {
+          points = current.p.z;
+          for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
+        } else {
+          interpolate(current.x, current.p.x, -1, stream);
+        }
+        current = current.p;
+      }
+      current = current.o;
+      points = current.z;
+      isSubject = !isSubject;
+    } while (!current.v);
+    stream.lineEnd();
+  }
+}
+
+function link$1(array) {
+  if (!(n = array.length)) return;
+  var n,
+      i = 0,
+      a = array[0],
+      b;
+  while (++i < n) {
+    a.n = b = array[i];
+    b.p = a;
+    a = b;
+  }
+  a.n = b = array[0];
+  b.p = a;
+}
+
+var sum$1 = adder();
+
+function polygonContains(polygon, point) {
+  var lambda = point[0],
+      phi = point[1],
+      sinPhi = sin$1(phi),
+      normal = [sin$1(lambda), -cos$1(lambda), 0],
+      angle = 0,
+      winding = 0;
+
+  sum$1.reset();
+
+  if (sinPhi === 1) phi = halfPi$2 + epsilon$2;
+  else if (sinPhi === -1) phi = -halfPi$2 - epsilon$2;
+
+  for (var i = 0, n = polygon.length; i < n; ++i) {
+    if (!(m = (ring = polygon[i]).length)) continue;
+    var ring,
+        m,
+        point0 = ring[m - 1],
+        lambda0 = point0[0],
+        phi0 = point0[1] / 2 + quarterPi,
+        sinPhi0 = sin$1(phi0),
+        cosPhi0 = cos$1(phi0);
+
+    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
+      var point1 = ring[j],
+          lambda1 = point1[0],
+          phi1 = point1[1] / 2 + quarterPi,
+          sinPhi1 = sin$1(phi1),
+          cosPhi1 = cos$1(phi1),
+          delta = lambda1 - lambda0,
+          sign$$1 = delta >= 0 ? 1 : -1,
+          absDelta = sign$$1 * delta,
+          antimeridian = absDelta > pi$3,
+          k = sinPhi0 * sinPhi1;
+
+      sum$1.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
+      angle += antimeridian ? delta + sign$$1 * tau$3 : delta;
+
+      // Are the longitudes either side of the point’s meridian (lambda),
+      // and are the latitudes smaller than the parallel (phi)?
+      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
+        var arc = cartesianCross(cartesian(point0), cartesian(point1));
+        cartesianNormalizeInPlace(arc);
+        var intersection = cartesianCross(normal, arc);
+        cartesianNormalizeInPlace(intersection);
+        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
+        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
+          winding += antimeridian ^ delta >= 0 ? 1 : -1;
+        }
+      }
+    }
+  }
+
+  // First, determine whether the South pole is inside or outside:
+  //
+  // It is inside if:
+  // * the polygon winds around it in a clockwise direction.
+  // * the polygon does not (cumulatively) wind around it, but has a negative
+  //   (counter-clockwise) area.
+  //
+  // Second, count the (signed) number of times a segment crosses a lambda
+  // from the point to the South pole.  If it is zero, then the point is the
+  // same side as the South pole.
+
+  return (angle < -epsilon$2 || angle < epsilon$2 && sum$1 < -epsilon$2) ^ (winding & 1);
+}
+
+function clip(pointVisible, clipLine, interpolate, start) {
+  return function(sink) {
+    var line = clipLine(sink),
+        ringBuffer = clipBuffer(),
+        ringSink = clipLine(ringBuffer),
+        polygonStarted = false,
+        polygon,
+        segments,
+        ring;
+
+    var clip = {
+      point: point,
+      lineStart: lineStart,
+      lineEnd: lineEnd,
+      polygonStart: function() {
+        clip.point = pointRing;
+        clip.lineStart = ringStart;
+        clip.lineEnd = ringEnd;
+        segments = [];
+        polygon = [];
+      },
+      polygonEnd: function() {
+        clip.point = point;
+        clip.lineStart = lineStart;
+        clip.lineEnd = lineEnd;
+        segments = merge(segments);
+        var startInside = polygonContains(polygon, start);
+        if (segments.length) {
+          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+          clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
+        } else if (startInside) {
+          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+          sink.lineStart();
+          interpolate(null, null, 1, sink);
+          sink.lineEnd();
+        }
+        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
+        segments = polygon = null;
+      },
+      sphere: function() {
+        sink.polygonStart();
+        sink.lineStart();
+        interpolate(null, null, 1, sink);
+        sink.lineEnd();
+        sink.polygonEnd();
+      }
+    };
+
+    function point(lambda, phi) {
+      if (pointVisible(lambda, phi)) sink.point(lambda, phi);
+    }
+
+    function pointLine(lambda, phi) {
+      line.point(lambda, phi);
+    }
+
+    function lineStart() {
+      clip.point = pointLine;
+      line.lineStart();
+    }
+
+    function lineEnd() {
+      clip.point = point;
+      line.lineEnd();
+    }
+
+    function pointRing(lambda, phi) {
+      ring.push([lambda, phi]);
+      ringSink.point(lambda, phi);
+    }
+
+    function ringStart() {
+      ringSink.lineStart();
+      ring = [];
+    }
+
+    function ringEnd() {
+      pointRing(ring[0][0], ring[0][1]);
+      ringSink.lineEnd();
+
+      var clean = ringSink.clean(),
+          ringSegments = ringBuffer.result(),
+          i, n = ringSegments.length, m,
+          segment,
+          point;
+
+      ring.pop();
+      polygon.push(ring);
+      ring = null;
+
+      if (!n) return;
+
+      // No intersections.
+      if (clean & 1) {
+        segment = ringSegments[0];
+        if ((m = segment.length - 1) > 0) {
+          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+          sink.lineStart();
+          for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
+          sink.lineEnd();
+        }
+        return;
+      }
+
+      // Rejoin connected segments.
+      // TODO reuse ringBuffer.rejoin()?
+      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
+
+      segments.push(ringSegments.filter(validSegment));
+    }
+
+    return clip;
+  };
+}
+
+function validSegment(segment) {
+  return segment.length > 1;
+}
+
+// Intersections are sorted along the clip edge. For both antimeridian cutting
+// and circle clipping, the same comparison is used.
+function compareIntersection(a, b) {
+  return ((a = a.x)[0] < 0 ? a[1] - halfPi$2 - epsilon$2 : halfPi$2 - a[1])
+       - ((b = b.x)[0] < 0 ? b[1] - halfPi$2 - epsilon$2 : halfPi$2 - b[1]);
+}
+
+var clipAntimeridian = clip(
+  function() { return true; },
+  clipAntimeridianLine,
+  clipAntimeridianInterpolate,
+  [-pi$3, -halfPi$2]
+);
+
+// Takes a line and cuts into visible segments. Return values: 0 - there were
+// intersections or the line was empty; 1 - no intersections; 2 - there were
+// intersections, and the first and last segments should be rejoined.
+function clipAntimeridianLine(stream) {
+  var lambda0 = NaN,
+      phi0 = NaN,
+      sign0 = NaN,
+      clean; // no intersections
+
+  return {
+    lineStart: function() {
+      stream.lineStart();
+      clean = 1;
+    },
+    point: function(lambda1, phi1) {
+      var sign1 = lambda1 > 0 ? pi$3 : -pi$3,
+          delta = abs(lambda1 - lambda0);
+      if (abs(delta - pi$3) < epsilon$2) { // line crosses a pole
+        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$2 : -halfPi$2);
+        stream.point(sign0, phi0);
+        stream.lineEnd();
+        stream.lineStart();
+        stream.point(sign1, phi0);
+        stream.point(lambda1, phi0);
+        clean = 0;
+      } else if (sign0 !== sign1 && delta >= pi$3) { // line crosses antimeridian
+        if (abs(lambda0 - sign0) < epsilon$2) lambda0 -= sign0 * epsilon$2; // handle degeneracies
+        if (abs(lambda1 - sign1) < epsilon$2) lambda1 -= sign1 * epsilon$2;
+        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
+        stream.point(sign0, phi0);
+        stream.lineEnd();
+        stream.lineStart();
+        stream.point(sign1, phi0);
+        clean = 0;
+      }
+      stream.point(lambda0 = lambda1, phi0 = phi1);
+      sign0 = sign1;
+    },
+    lineEnd: function() {
+      stream.lineEnd();
+      lambda0 = phi0 = NaN;
+    },
+    clean: function() {
+      return 2 - clean; // if intersections, rejoin first and last segments
+    }
+  };
+}
+
+function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
+  var cosPhi0,
+      cosPhi1,
+      sinLambda0Lambda1 = sin$1(lambda0 - lambda1);
+  return abs(sinLambda0Lambda1) > epsilon$2
+      ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1)
+          - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0))
+          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
+      : (phi0 + phi1) / 2;
+}
+
+function clipAntimeridianInterpolate(from, to, direction, stream) {
+  var phi;
+  if (from == null) {
+    phi = direction * halfPi$2;
+    stream.point(-pi$3, phi);
+    stream.point(0, phi);
+    stream.point(pi$3, phi);
+    stream.point(pi$3, 0);
+    stream.point(pi$3, -phi);
+    stream.point(0, -phi);
+    stream.point(-pi$3, -phi);
+    stream.point(-pi$3, 0);
+    stream.point(-pi$3, phi);
+  } else if (abs(from[0] - to[0]) > epsilon$2) {
+    var lambda = from[0] < to[0] ? pi$3 : -pi$3;
+    phi = direction * lambda / 2;
+    stream.point(-lambda, phi);
+    stream.point(0, phi);
+    stream.point(lambda, phi);
+  } else {
+    stream.point(to[0], to[1]);
+  }
+}
+
+function clipCircle(radius) {
+  var cr = cos$1(radius),
+      delta = 6 * radians,
+      smallRadius = cr > 0,
+      notHemisphere = abs(cr) > epsilon$2; // TODO optimise for this common case
+
+  function interpolate(from, to, direction, stream) {
+    circleStream(stream, radius, delta, direction, from, to);
+  }
+
+  function visible(lambda, phi) {
+    return cos$1(lambda) * cos$1(phi) > cr;
+  }
+
+  // Takes a line and cuts into visible segments. Return values used for polygon
+  // clipping: 0 - there were intersections or the line was empty; 1 - no
+  // intersections 2 - there were intersections, and the first and last segments
+  // should be rejoined.
+  function clipLine(stream) {
+    var point0, // previous point
+        c0, // code for previous point
+        v0, // visibility of previous point
+        v00, // visibility of first point
+        clean; // no intersections
+    return {
+      lineStart: function() {
+        v00 = v0 = false;
+        clean = 1;
+      },
+      point: function(lambda, phi) {
+        var point1 = [lambda, phi],
+            point2,
+            v = visible(lambda, phi),
+            c = smallRadius
+              ? v ? 0 : code(lambda, phi)
+              : v ? code(lambda + (lambda < 0 ? pi$3 : -pi$3), phi) : 0;
+        if (!point0 && (v00 = v0 = v)) stream.lineStart();
+        // Handle degeneracies.
+        // TODO ignore if not clipping polygons.
+        if (v !== v0) {
+          point2 = intersect(point0, point1);
+          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) {
+            point1[0] += epsilon$2;
+            point1[1] += epsilon$2;
+            v = visible(point1[0], point1[1]);
+          }
+        }
+        if (v !== v0) {
+          clean = 0;
+          if (v) {
+            // outside going in
+            stream.lineStart();
+            point2 = intersect(point1, point0);
+            stream.point(point2[0], point2[1]);
+          } else {
+            // inside going out
+            point2 = intersect(point0, point1);
+            stream.point(point2[0], point2[1]);
+            stream.lineEnd();
+          }
+          point0 = point2;
+        } else if (notHemisphere && point0 && smallRadius ^ v) {
+          var t;
+          // If the codes for two points are different, or are both zero,
+          // and there this segment intersects with the small circle.
+          if (!(c & c0) && (t = intersect(point1, point0, true))) {
+            clean = 0;
+            if (smallRadius) {
+              stream.lineStart();
+              stream.point(t[0][0], t[0][1]);
+              stream.point(t[1][0], t[1][1]);
+              stream.lineEnd();
+            } else {
+              stream.point(t[1][0], t[1][1]);
+              stream.lineEnd();
+              stream.lineStart();
+              stream.point(t[0][0], t[0][1]);
+            }
+          }
+        }
+        if (v && (!point0 || !pointEqual(point0, point1))) {
+          stream.point(point1[0], point1[1]);
+        }
+        point0 = point1, v0 = v, c0 = c;
+      },
+      lineEnd: function() {
+        if (v0) stream.lineEnd();
+        point0 = null;
+      },
+      // Rejoin first and last segments if there were intersections and the first
+      // and last points were visible.
+      clean: function() {
+        return clean | ((v00 && v0) << 1);
+      }
+    };
+  }
+
+  // Intersects the great circle between a and b with the clip circle.
+  function intersect(a, b, two) {
+    var pa = cartesian(a),
+        pb = cartesian(b);
+
+    // We have two planes, n1.p = d1 and n2.p = d2.
+    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
+    var n1 = [1, 0, 0], // normal
+        n2 = cartesianCross(pa, pb),
+        n2n2 = cartesianDot(n2, n2),
+        n1n2 = n2[0], // cartesianDot(n1, n2),
+        determinant = n2n2 - n1n2 * n1n2;
+
+    // Two polar points.
+    if (!determinant) return !two && a;
+
+    var c1 =  cr * n2n2 / determinant,
+        c2 = -cr * n1n2 / determinant,
+        n1xn2 = cartesianCross(n1, n2),
+        A = cartesianScale(n1, c1),
+        B = cartesianScale(n2, c2);
+    cartesianAddInPlace(A, B);
+
+    // Solve |p(t)|^2 = 1.
+    var u = n1xn2,
+        w = cartesianDot(A, u),
+        uu = cartesianDot(u, u),
+        t2 = w * w - uu * (cartesianDot(A, A) - 1);
+
+    if (t2 < 0) return;
+
+    var t = sqrt(t2),
+        q = cartesianScale(u, (-w - t) / uu);
+    cartesianAddInPlace(q, A);
+    q = spherical(q);
+
+    if (!two) return q;
+
+    // Two intersection points.
+    var lambda0 = a[0],
+        lambda1 = b[0],
+        phi0 = a[1],
+        phi1 = b[1],
+        z;
+
+    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
+
+    var delta = lambda1 - lambda0,
+        polar = abs(delta - pi$3) < epsilon$2,
+        meridian = polar || delta < epsilon$2;
+
+    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;
+
+    // Check that the first point is between a and b.
+    if (meridian
+        ? polar
+          ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$2 ? phi0 : phi1)
+          : phi0 <= q[1] && q[1] <= phi1
+        : delta > pi$3 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
+      var q1 = cartesianScale(u, (-w + t) / uu);
+      cartesianAddInPlace(q1, A);
+      return [q, spherical(q1)];
+    }
+  }
+
+  // Generates a 4-bit vector representing the location of a point relative to
+  // the small circle's bounding box.
+  function code(lambda, phi) {
+    var r = smallRadius ? radius : pi$3 - radius,
+        code = 0;
+    if (lambda < -r) code |= 1; // left
+    else if (lambda > r) code |= 2; // right
+    if (phi < -r) code |= 4; // below
+    else if (phi > r) code |= 8; // above
+    return code;
+  }
+
+  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$3, radius - pi$3]);
+}
+
+function clipLine(a, b, x0, y0, x1, y1) {
+  var ax = a[0],
+      ay = a[1],
+      bx = b[0],
+      by = b[1],
+      t0 = 0,
+      t1 = 1,
+      dx = bx - ax,
+      dy = by - ay,
+      r;
+
+  r = x0 - ax;
+  if (!dx && r > 0) return;
+  r /= dx;
+  if (dx < 0) {
+    if (r < t0) return;
+    if (r < t1) t1 = r;
+  } else if (dx > 0) {
+    if (r > t1) return;
+    if (r > t0) t0 = r;
+  }
+
+  r = x1 - ax;
+  if (!dx && r < 0) return;
+  r /= dx;
+  if (dx < 0) {
+    if (r > t1) return;
+    if (r > t0) t0 = r;
+  } else if (dx > 0) {
+    if (r < t0) return;
+    if (r < t1) t1 = r;
+  }
+
+  r = y0 - ay;
+  if (!dy && r > 0) return;
+  r /= dy;
+  if (dy < 0) {
+    if (r < t0) return;
+    if (r < t1) t1 = r;
+  } else if (dy > 0) {
+    if (r > t1) return;
+    if (r > t0) t0 = r;
+  }
+
+  r = y1 - ay;
+  if (!dy && r < 0) return;
+  r /= dy;
+  if (dy < 0) {
+    if (r > t1) return;
+    if (r > t0) t0 = r;
+  } else if (dy > 0) {
+    if (r < t0) return;
+    if (r < t1) t1 = r;
+  }
+
+  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
+  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
+  return true;
+}
+
+var clipMax = 1e9, clipMin = -clipMax;
+
+// TODO Use d3-polygon’s polygonContains here for the ring check?
+// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
+
+function clipRectangle(x0, y0, x1, y1) {
+
+  function visible(x, y) {
+    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
+  }
+
+  function interpolate(from, to, direction, stream) {
+    var a = 0, a1 = 0;
+    if (from == null
+        || (a = corner(from, direction)) !== (a1 = corner(to, direction))
+        || comparePoint(from, to) < 0 ^ direction > 0) {
+      do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
+      while ((a = (a + direction + 4) % 4) !== a1);
+    } else {
+      stream.point(to[0], to[1]);
+    }
+  }
+
+  function corner(p, direction) {
+    return abs(p[0] - x0) < epsilon$2 ? direction > 0 ? 0 : 3
+        : abs(p[0] - x1) < epsilon$2 ? direction > 0 ? 2 : 1
+        : abs(p[1] - y0) < epsilon$2 ? direction > 0 ? 1 : 0
+        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
+  }
+
+  function compareIntersection(a, b) {
+    return comparePoint(a.x, b.x);
+  }
+
+  function comparePoint(a, b) {
+    var ca = corner(a, 1),
+        cb = corner(b, 1);
+    return ca !== cb ? ca - cb
+        : ca === 0 ? b[1] - a[1]
+        : ca === 1 ? a[0] - b[0]
+        : ca === 2 ? a[1] - b[1]
+        : b[0] - a[0];
+  }
+
+  return function(stream) {
+    var activeStream = stream,
+        bufferStream = clipBuffer(),
+        segments,
+        polygon,
+        ring,
+        x__, y__, v__, // first point
+        x_, y_, v_, // previous point
+        first,
+        clean;
+
+    var clipStream = {
+      point: point,
+      lineStart: lineStart,
+      lineEnd: lineEnd,
+      polygonStart: polygonStart,
+      polygonEnd: polygonEnd
+    };
+
+    function point(x, y) {
+      if (visible(x, y)) activeStream.point(x, y);
+    }
+
+    function polygonInside() {
+      var winding = 0;
+
+      for (var i = 0, n = polygon.length; i < n; ++i) {
+        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
+          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
+          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }
+          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }
+        }
+      }
+
+      return winding;
+    }
+
+    // Buffer geometry within a polygon and then clip it en masse.
+    function polygonStart() {
+      activeStream = bufferStream, segments = [], polygon = [], clean = true;
+    }
+
+    function polygonEnd() {
+      var startInside = polygonInside(),
+          cleanInside = clean && startInside,
+          visible = (segments = merge(segments)).length;
+      if (cleanInside || visible) {
+        stream.polygonStart();
+        if (cleanInside) {
+          stream.lineStart();
+          interpolate(null, null, 1, stream);
+          stream.lineEnd();
+        }
+        if (visible) {
+          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
+        }
+        stream.polygonEnd();
+      }
+      activeStream = stream, segments = polygon = ring = null;
+    }
+
+    function lineStart() {
+      clipStream.point = linePoint;
+      if (polygon) polygon.push(ring = []);
+      first = true;
+      v_ = false;
+      x_ = y_ = NaN;
+    }
+
+    // TODO rather than special-case polygons, simply handle them separately.
+    // Ideally, coincident intersection points should be jittered to avoid
+    // clipping issues.
+    function lineEnd() {
+      if (segments) {
+        linePoint(x__, y__);
+        if (v__ && v_) bufferStream.rejoin();
+        segments.push(bufferStream.result());
+      }
+      clipStream.point = point;
+      if (v_) activeStream.lineEnd();
+    }
+
+    function linePoint(x, y) {
+      var v = visible(x, y);
+      if (polygon) ring.push([x, y]);
+      if (first) {
+        x__ = x, y__ = y, v__ = v;
+        first = false;
+        if (v) {
+          activeStream.lineStart();
+          activeStream.point(x, y);
+        }
+      } else {
+        if (v && v_) activeStream.point(x, y);
+        else {
+          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
+              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
+          if (clipLine(a, b, x0, y0, x1, y1)) {
+            if (!v_) {
+              activeStream.lineStart();
+              activeStream.point(a[0], a[1]);
+            }
+            activeStream.point(b[0], b[1]);
+            if (!v) activeStream.lineEnd();
+            clean = false;
+          } else if (v) {
+            activeStream.lineStart();
+            activeStream.point(x, y);
+            clean = false;
+          }
+        }
+      }
+      x_ = x, y_ = y, v_ = v;
+    }
+
+    return clipStream;
+  };
+}
+
+function extent$1() {
+  var x0 = 0,
+      y0 = 0,
+      x1 = 960,
+      y1 = 500,
+      cache,
+      cacheStream,
+      clip;
+
+  return clip = {
+    stream: function(stream) {
+      return cache && cacheStream === stream ? cache : cache = clipRectangle(x0, y0, x1, y1)(cacheStream = stream);
+    },
+    extent: function(_) {
+      return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];
+    }
+  };
+}
+
+var lengthSum = adder(),
+    lambda0$2,
+    sinPhi0$1,
+    cosPhi0$1;
+
+var lengthStream = {
+  sphere: noop$2,
+  point: noop$2,
+  lineStart: lengthLineStart,
+  lineEnd: noop$2,
+  polygonStart: noop$2,
+  polygonEnd: noop$2
+};
+
+function lengthLineStart() {
+  lengthStream.point = lengthPointFirst;
+  lengthStream.lineEnd = lengthLineEnd;
+}
+
+function lengthLineEnd() {
+  lengthStream.point = lengthStream.lineEnd = noop$2;
+}
+
+function lengthPointFirst(lambda, phi) {
+  lambda *= radians, phi *= radians;
+  lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi);
+  lengthStream.point = lengthPoint;
+}
+
+function lengthPoint(lambda, phi) {
+  lambda *= radians, phi *= radians;
+  var sinPhi = sin$1(phi),
+      cosPhi = cos$1(phi),
+      delta = abs(lambda - lambda0$2),
+      cosDelta = cos$1(delta),
+      sinDelta = sin$1(delta),
+      x = cosPhi * sinDelta,
+      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
+      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
+  lengthSum.add(atan2(sqrt(x * x + y * y), z));
+  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
+}
+
+function length$1(object) {
+  lengthSum.reset();
+  geoStream(object, lengthStream);
+  return +lengthSum;
+}
+
+var coordinates = [null, null],
+    object$1 = {type: "LineString", coordinates: coordinates};
+
+function distance(a, b) {
+  coordinates[0] = a;
+  coordinates[1] = b;
+  return length$1(object$1);
+}
+
+var containsObjectType = {
+  Feature: function(object, point) {
+    return containsGeometry(object.geometry, point);
+  },
+  FeatureCollection: function(object, point) {
+    var features = object.features, i = -1, n = features.length;
+    while (++i < n) if (containsGeometry(features[i].geometry, point)) return true;
+    return false;
+  }
+};
+
+var containsGeometryType = {
+  Sphere: function() {
+    return true;
+  },
+  Point: function(object, point) {
+    return containsPoint(object.coordinates, point);
+  },
+  MultiPoint: function(object, point) {
+    var coordinates = object.coordinates, i = -1, n = coordinates.length;
+    while (++i < n) if (containsPoint(coordinates[i], point)) return true;
+    return false;
+  },
+  LineString: function(object, point) {
+    return containsLine(object.coordinates, point);
+  },
+  MultiLineString: function(object, point) {
+    var coordinates = object.coordinates, i = -1, n = coordinates.length;
+    while (++i < n) if (containsLine(coordinates[i], point)) return true;
+    return false;
+  },
+  Polygon: function(object, point) {
+    return containsPolygon(object.coordinates, point);
+  },
+  MultiPolygon: function(object, point) {
+    var coordinates = object.coordinates, i = -1, n = coordinates.length;
+    while (++i < n) if (containsPolygon(coordinates[i], point)) return true;
+    return false;
+  },
+  GeometryCollection: function(object, point) {
+    var geometries = object.geometries, i = -1, n = geometries.length;
+    while (++i < n) if (containsGeometry(geometries[i], point)) return true;
+    return false;
+  }
+};
+
+function containsGeometry(geometry, point) {
+  return geometry && containsGeometryType.hasOwnProperty(geometry.type)
+      ? containsGeometryType[geometry.type](geometry, point)
+      : false;
+}
+
+function containsPoint(coordinates, point) {
+  return distance(coordinates, point) === 0;
+}
+
+function containsLine(coordinates, point) {
+  var ab = distance(coordinates[0], coordinates[1]),
+      ao = distance(coordinates[0], point),
+      ob = distance(point, coordinates[1]);
+  return ao + ob <= ab + epsilon$2;
+}
+
+function containsPolygon(coordinates, point) {
+  return !!polygonContains(coordinates.map(ringRadians), pointRadians(point));
+}
+
+function ringRadians(ring) {
+  return ring = ring.map(pointRadians), ring.pop(), ring;
+}
+
+function pointRadians(point) {
+  return [point[0] * radians, point[1] * radians];
+}
+
+function contains$1(object, point) {
+  return (object && containsObjectType.hasOwnProperty(object.type)
+      ? containsObjectType[object.type]
+      : containsGeometry)(object, point);
+}
+
+function graticuleX(y0, y1, dy) {
+  var y = sequence(y0, y1 - epsilon$2, dy).concat(y1);
+  return function(x) { return y.map(function(y) { return [x, y]; }); };
+}
+
+function graticuleY(x0, x1, dx) {
+  var x = sequence(x0, x1 - epsilon$2, dx).concat(x1);
+  return function(y) { return x.map(function(x) { return [x, y]; }); };
+}
+
+function graticule() {
+  var x1, x0, X1, X0,
+      y1, y0, Y1, Y0,
+      dx = 10, dy = dx, DX = 90, DY = 360,
+      x, y, X, Y,
+      precision = 2.5;
+
+  function graticule() {
+    return {type: "MultiLineString", coordinates: lines()};
+  }
+
+  function lines() {
+    return sequence(ceil(X0 / DX) * DX, X1, DX).map(X)
+        .concat(sequence(ceil(Y0 / DY) * DY, Y1, DY).map(Y))
+        .concat(sequence(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$2; }).map(x))
+        .concat(sequence(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$2; }).map(y));
+  }
+
+  graticule.lines = function() {
+    return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; });
+  };
+
+  graticule.outline = function() {
+    return {
+      type: "Polygon",
+      coordinates: [
+        X(X0).concat(
+        Y(Y1).slice(1),
+        X(X1).reverse().slice(1),
+        Y(Y0).reverse().slice(1))
+      ]
+    };
+  };
+
+  graticule.extent = function(_) {
+    if (!arguments.length) return graticule.extentMinor();
+    return graticule.extentMajor(_).extentMinor(_);
+  };
+
+  graticule.extentMajor = function(_) {
+    if (!arguments.length) return [[X0, Y0], [X1, Y1]];
+    X0 = +_[0][0], X1 = +_[1][0];
+    Y0 = +_[0][1], Y1 = +_[1][1];
+    if (X0 > X1) _ = X0, X0 = X1, X1 = _;
+    if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
+    return graticule.precision(precision);
+  };
+
+  graticule.extentMinor = function(_) {
+    if (!arguments.length) return [[x0, y0], [x1, y1]];
+    x0 = +_[0][0], x1 = +_[1][0];
+    y0 = +_[0][1], y1 = +_[1][1];
+    if (x0 > x1) _ = x0, x0 = x1, x1 = _;
+    if (y0 > y1) _ = y0, y0 = y1, y1 = _;
+    return graticule.precision(precision);
+  };
+
+  graticule.step = function(_) {
+    if (!arguments.length) return graticule.stepMinor();
+    return graticule.stepMajor(_).stepMinor(_);
+  };
+
+  graticule.stepMajor = function(_) {
+    if (!arguments.length) return [DX, DY];
+    DX = +_[0], DY = +_[1];
+    return graticule;
+  };
+
+  graticule.stepMinor = function(_) {
+    if (!arguments.length) return [dx, dy];
+    dx = +_[0], dy = +_[1];
+    return graticule;
+  };
+
+  graticule.precision = function(_) {
+    if (!arguments.length) return precision;
+    precision = +_;
+    x = graticuleX(y0, y1, 90);
+    y = graticuleY(x0, x1, precision);
+    X = graticuleX(Y0, Y1, 90);
+    Y = graticuleY(X0, X1, precision);
+    return graticule;
+  };
+
+  return graticule
+      .extentMajor([[-180, -90 + epsilon$2], [180, 90 - epsilon$2]])
+      .extentMinor([[-180, -80 - epsilon$2], [180, 80 + epsilon$2]]);
+}
+
+function graticule10() {
+  return graticule()();
+}
+
+function interpolate$1(a, b) {
+  var x0 = a[0] * radians,
+      y0 = a[1] * radians,
+      x1 = b[0] * radians,
+      y1 = b[1] * radians,
+      cy0 = cos$1(y0),
+      sy0 = sin$1(y0),
+      cy1 = cos$1(y1),
+      sy1 = sin$1(y1),
+      kx0 = cy0 * cos$1(x0),
+      ky0 = cy0 * sin$1(x0),
+      kx1 = cy1 * cos$1(x1),
+      ky1 = cy1 * sin$1(x1),
+      d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),
+      k = sin$1(d);
+
+  var interpolate = d ? function(t) {
+    var B = sin$1(t *= d) / k,
+        A = sin$1(d - t) / k,
+        x = A * kx0 + B * kx1,
+        y = A * ky0 + B * ky1,
+        z = A * sy0 + B * sy1;
+    return [
+      atan2(y, x) * degrees$1,
+      atan2(z, sqrt(x * x + y * y)) * degrees$1
+    ];
+  } : function() {
+    return [x0 * degrees$1, y0 * degrees$1];
+  };
+
+  interpolate.distance = d;
+
+  return interpolate;
+}
+
+function identity$4(x) {
+  return x;
+}
+
+var areaSum$1 = adder(),
+    areaRingSum$1 = adder(),
+    x00,
+    y00,
+    x0$1,
+    y0$1;
+
+var areaStream$1 = {
+  point: noop$2,
+  lineStart: noop$2,
+  lineEnd: noop$2,
+  polygonStart: function() {
+    areaStream$1.lineStart = areaRingStart$1;
+    areaStream$1.lineEnd = areaRingEnd$1;
+  },
+  polygonEnd: function() {
+    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;
+    areaSum$1.add(abs(areaRingSum$1));
+    areaRingSum$1.reset();
+  },
+  result: function() {
+    var area = areaSum$1 / 2;
+    areaSum$1.reset();
+    return area;
+  }
+};
+
+function areaRingStart$1() {
+  areaStream$1.point = areaPointFirst$1;
+}
+
+function areaPointFirst$1(x, y) {
+  areaStream$1.point = areaPoint$1;
+  x00 = x0$1 = x, y00 = y0$1 = y;
+}
+
+function areaPoint$1(x, y) {
+  areaRingSum$1.add(y0$1 * x - x0$1 * y);
+  x0$1 = x, y0$1 = y;
+}
+
+function areaRingEnd$1() {
+  areaPoint$1(x00, y00);
+}
+
+var x0$2 = Infinity,
+    y0$2 = x0$2,
+    x1 = -x0$2,
+    y1 = x1;
+
+var boundsStream$1 = {
+  point: boundsPoint$1,
+  lineStart: noop$2,
+  lineEnd: noop$2,
+  polygonStart: noop$2,
+  polygonEnd: noop$2,
+  result: function() {
+    var bounds = [[x0$2, y0$2], [x1, y1]];
+    x1 = y1 = -(y0$2 = x0$2 = Infinity);
+    return bounds;
+  }
+};
+
+function boundsPoint$1(x, y) {
+  if (x < x0$2) x0$2 = x;
+  if (x > x1) x1 = x;
+  if (y < y0$2) y0$2 = y;
+  if (y > y1) y1 = y;
+}
+
+// TODO Enforce positive area for exterior, negative area for interior?
+
+var X0$1 = 0,
+    Y0$1 = 0,
+    Z0$1 = 0,
+    X1$1 = 0,
+    Y1$1 = 0,
+    Z1$1 = 0,
+    X2$1 = 0,
+    Y2$1 = 0,
+    Z2$1 = 0,
+    x00$1,
+    y00$1,
+    x0$3,
+    y0$3;
+
+var centroidStream$1 = {
+  point: centroidPoint$1,
+  lineStart: centroidLineStart$1,
+  lineEnd: centroidLineEnd$1,
+  polygonStart: function() {
+    centroidStream$1.lineStart = centroidRingStart$1;
+    centroidStream$1.lineEnd = centroidRingEnd$1;
+  },
+  polygonEnd: function() {
+    centroidStream$1.point = centroidPoint$1;
+    centroidStream$1.lineStart = centroidLineStart$1;
+    centroidStream$1.lineEnd = centroidLineEnd$1;
+  },
+  result: function() {
+    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
+        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
+        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
+        : [NaN, NaN];
+    X0$1 = Y0$1 = Z0$1 =
+    X1$1 = Y1$1 = Z1$1 =
+    X2$1 = Y2$1 = Z2$1 = 0;
+    return centroid;
+  }
+};
+
+function centroidPoint$1(x, y) {
+  X0$1 += x;
+  Y0$1 += y;
+  ++Z0$1;
+}
+
+function centroidLineStart$1() {
+  centroidStream$1.point = centroidPointFirstLine;
+}
+
+function centroidPointFirstLine(x, y) {
+  centroidStream$1.point = centroidPointLine;
+  centroidPoint$1(x0$3 = x, y0$3 = y);
+}
+
+function centroidPointLine(x, y) {
+  var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
+  X1$1 += z * (x0$3 + x) / 2;
+  Y1$1 += z * (y0$3 + y) / 2;
+  Z1$1 += z;
+  centroidPoint$1(x0$3 = x, y0$3 = y);
+}
+
+function centroidLineEnd$1() {
+  centroidStream$1.point = centroidPoint$1;
+}
+
+function centroidRingStart$1() {
+  centroidStream$1.point = centroidPointFirstRing;
+}
+
+function centroidRingEnd$1() {
+  centroidPointRing(x00$1, y00$1);
+}
+
+function centroidPointFirstRing(x, y) {
+  centroidStream$1.point = centroidPointRing;
+  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
+}
+
+function centroidPointRing(x, y) {
+  var dx = x - x0$3,
+      dy = y - y0$3,
+      z = sqrt(dx * dx + dy * dy);
+
+  X1$1 += z * (x0$3 + x) / 2;
+  Y1$1 += z * (y0$3 + y) / 2;
+  Z1$1 += z;
+
+  z = y0$3 * x - x0$3 * y;
+  X2$1 += z * (x0$3 + x);
+  Y2$1 += z * (y0$3 + y);
+  Z2$1 += z * 3;
+  centroidPoint$1(x0$3 = x, y0$3 = y);
+}
+
+function PathContext(context) {
+  this._context = context;
+}
+
+PathContext.prototype = {
+  _radius: 4.5,
+  pointRadius: function(_) {
+    return this._radius = _, this;
+  },
+  polygonStart: function() {
+    this._line = 0;
+  },
+  polygonEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line === 0) this._context.closePath();
+    this._point = NaN;
+  },
+  point: function(x, y) {
+    switch (this._point) {
+      case 0: {
+        this._context.moveTo(x, y);
+        this._point = 1;
+        break;
+      }
+      case 1: {
+        this._context.lineTo(x, y);
+        break;
+      }
+      default: {
+        this._context.moveTo(x + this._radius, y);
+        this._context.arc(x, y, this._radius, 0, tau$3);
+        break;
+      }
+    }
+  },
+  result: noop$2
+};
+
+var lengthSum$1 = adder(),
+    lengthRing,
+    x00$2,
+    y00$2,
+    x0$4,
+    y0$4;
+
+var lengthStream$1 = {
+  point: noop$2,
+  lineStart: function() {
+    lengthStream$1.point = lengthPointFirst$1;
+  },
+  lineEnd: function() {
+    if (lengthRing) lengthPoint$1(x00$2, y00$2);
+    lengthStream$1.point = noop$2;
+  },
+  polygonStart: function() {
+    lengthRing = true;
+  },
+  polygonEnd: function() {
+    lengthRing = null;
+  },
+  result: function() {
+    var length = +lengthSum$1;
+    lengthSum$1.reset();
+    return length;
+  }
+};
+
+function lengthPointFirst$1(x, y) {
+  lengthStream$1.point = lengthPoint$1;
+  x00$2 = x0$4 = x, y00$2 = y0$4 = y;
+}
+
+function lengthPoint$1(x, y) {
+  x0$4 -= x, y0$4 -= y;
+  lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));
+  x0$4 = x, y0$4 = y;
+}
+
+function PathString() {
+  this._string = [];
+}
+
+PathString.prototype = {
+  _radius: 4.5,
+  _circle: circle$1(4.5),
+  pointRadius: function(_) {
+    if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;
+    return this;
+  },
+  polygonStart: function() {
+    this._line = 0;
+  },
+  polygonEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line === 0) this._string.push("Z");
+    this._point = NaN;
+  },
+  point: function(x, y) {
+    switch (this._point) {
+      case 0: {
+        this._string.push("M", x, ",", y);
+        this._point = 1;
+        break;
+      }
+      case 1: {
+        this._string.push("L", x, ",", y);
+        break;
+      }
+      default: {
+        if (this._circle == null) this._circle = circle$1(this._radius);
+        this._string.push("M", x, ",", y, this._circle);
+        break;
+      }
+    }
+  },
+  result: function() {
+    if (this._string.length) {
+      var result = this._string.join("");
+      this._string = [];
+      return result;
+    } else {
+      return null;
+    }
+  }
+};
+
+function circle$1(radius) {
+  return "m0," + radius
+      + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
+      + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
+      + "z";
+}
+
+function index$1(projection, context) {
+  var pointRadius = 4.5,
+      projectionStream,
+      contextStream;
+
+  function path(object) {
+    if (object) {
+      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
+      geoStream(object, projectionStream(contextStream));
+    }
+    return contextStream.result();
+  }
+
+  path.area = function(object) {
+    geoStream(object, projectionStream(areaStream$1));
+    return areaStream$1.result();
+  };
+
+  path.measure = function(object) {
+    geoStream(object, projectionStream(lengthStream$1));
+    return lengthStream$1.result();
+  };
+
+  path.bounds = function(object) {
+    geoStream(object, projectionStream(boundsStream$1));
+    return boundsStream$1.result();
+  };
+
+  path.centroid = function(object) {
+    geoStream(object, projectionStream(centroidStream$1));
+    return centroidStream$1.result();
+  };
+
+  path.projection = function(_) {
+    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
+  };
+
+  path.context = function(_) {
+    if (!arguments.length) return context;
+    contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);
+    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
+    return path;
+  };
+
+  path.pointRadius = function(_) {
+    if (!arguments.length) return pointRadius;
+    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
+    return path;
+  };
+
+  return path.projection(projection).context(context);
+}
+
+function transform(methods) {
+  return {
+    stream: transformer(methods)
+  };
+}
+
+function transformer(methods) {
+  return function(stream) {
+    var s = new TransformStream;
+    for (var key in methods) s[key] = methods[key];
+    s.stream = stream;
+    return s;
+  };
+}
+
+function TransformStream() {}
+
+TransformStream.prototype = {
+  constructor: TransformStream,
+  point: function(x, y) { this.stream.point(x, y); },
+  sphere: function() { this.stream.sphere(); },
+  lineStart: function() { this.stream.lineStart(); },
+  lineEnd: function() { this.stream.lineEnd(); },
+  polygonStart: function() { this.stream.polygonStart(); },
+  polygonEnd: function() { this.stream.polygonEnd(); }
+};
+
+function fit(projection, fitBounds, object) {
+  var clip = projection.clipExtent && projection.clipExtent();
+  projection.scale(150).translate([0, 0]);
+  if (clip != null) projection.clipExtent(null);
+  geoStream(object, projection.stream(boundsStream$1));
+  fitBounds(boundsStream$1.result());
+  if (clip != null) projection.clipExtent(clip);
+  return projection;
+}
+
+function fitExtent(projection, extent, object) {
+  return fit(projection, function(b) {
+    var w = extent[1][0] - extent[0][0],
+        h = extent[1][1] - extent[0][1],
+        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
+        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
+        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
+    projection.scale(150 * k).translate([x, y]);
+  }, object);
+}
+
+function fitSize(projection, size, object) {
+  return fitExtent(projection, [[0, 0], size], object);
+}
+
+function fitWidth(projection, width, object) {
+  return fit(projection, function(b) {
+    var w = +width,
+        k = w / (b[1][0] - b[0][0]),
+        x = (w - k * (b[1][0] + b[0][0])) / 2,
+        y = -k * b[0][1];
+    projection.scale(150 * k).translate([x, y]);
+  }, object);
+}
+
+function fitHeight(projection, height, object) {
+  return fit(projection, function(b) {
+    var h = +height,
+        k = h / (b[1][1] - b[0][1]),
+        x = -k * b[0][0],
+        y = (h - k * (b[1][1] + b[0][1])) / 2;
+    projection.scale(150 * k).translate([x, y]);
+  }, object);
+}
+
+var maxDepth = 16, // maximum depth of subdivision
+    cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)
+
+function resample(project, delta2) {
+  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
+}
+
+function resampleNone(project) {
+  return transformer({
+    point: function(x, y) {
+      x = project(x, y);
+      this.stream.point(x[0], x[1]);
+    }
+  });
+}
+
+function resample$1(project, delta2) {
+
+  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
+    var dx = x1 - x0,
+        dy = y1 - y0,
+        d2 = dx * dx + dy * dy;
+    if (d2 > 4 * delta2 && depth--) {
+      var a = a0 + a1,
+          b = b0 + b1,
+          c = c0 + c1,
+          m = sqrt(a * a + b * b + c * c),
+          phi2 = asin(c /= m),
+          lambda2 = abs(abs(c) - 1) < epsilon$2 || abs(lambda0 - lambda1) < epsilon$2 ? (lambda0 + lambda1) / 2 : atan2(b, a),
+          p = project(lambda2, phi2),
+          x2 = p[0],
+          y2 = p[1],
+          dx2 = x2 - x0,
+          dy2 = y2 - y0,
+          dz = dy * dx2 - dx * dy2;
+      if (dz * dz / d2 > delta2 // perpendicular projected distance
+          || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
+          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
+        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
+        stream.point(x2, y2);
+        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
+      }
+    }
+  }
+  return function(stream) {
+    var lambda00, x00, y00, a00, b00, c00, // first point
+        lambda0, x0, y0, a0, b0, c0; // previous point
+
+    var resampleStream = {
+      point: point,
+      lineStart: lineStart,
+      lineEnd: lineEnd,
+      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
+      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
+    };
+
+    function point(x, y) {
+      x = project(x, y);
+      stream.point(x[0], x[1]);
+    }
+
+    function lineStart() {
+      x0 = NaN;
+      resampleStream.point = linePoint;
+      stream.lineStart();
+    }
+
+    function linePoint(lambda, phi) {
+      var c = cartesian([lambda, phi]), p = project(lambda, phi);
+      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
+      stream.point(x0, y0);
+    }
+
+    function lineEnd() {
+      resampleStream.point = point;
+      stream.lineEnd();
+    }
+
+    function ringStart() {
+      lineStart();
+      resampleStream.point = ringPoint;
+      resampleStream.lineEnd = ringEnd;
+    }
+
+    function ringPoint(lambda, phi) {
+      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
+      resampleStream.point = linePoint;
+    }
+
+    function ringEnd() {
+      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
+      resampleStream.lineEnd = lineEnd;
+      lineEnd();
+    }
+
+    return resampleStream;
+  };
+}
+
+var transformRadians = transformer({
+  point: function(x, y) {
+    this.stream.point(x * radians, y * radians);
+  }
+});
+
+function transformRotate(rotate) {
+  return transformer({
+    point: function(x, y) {
+      var r = rotate(x, y);
+      return this.stream.point(r[0], r[1]);
+    }
+  });
+}
+
+function scaleTranslate(k, dx, dy) {
+  function transform$$1(x, y) {
+    return [dx + k * x, dy - k * y];
+  }
+  transform$$1.invert = function(x, y) {
+    return [(x - dx) / k, (dy - y) / k];
+  };
+  return transform$$1;
+}
+
+function scaleTranslateRotate(k, dx, dy, alpha) {
+  var cosAlpha = cos$1(alpha),
+      sinAlpha = sin$1(alpha),
+      a = cosAlpha * k,
+      b = sinAlpha * k,
+      ai = cosAlpha / k,
+      bi = sinAlpha / k,
+      ci = (sinAlpha * dy - cosAlpha * dx) / k,
+      fi = (sinAlpha * dx + cosAlpha * dy) / k;
+  function transform$$1(x, y) {
+    return [a * x - b * y + dx, dy - b * x - a * y];
+  }
+  transform$$1.invert = function(x, y) {
+    return [ai * x - bi * y + ci, fi - bi * x - ai * y];
+  };
+  return transform$$1;
+}
+
+function projection(project) {
+  return projectionMutator(function() { return project; })();
+}
+
+function projectionMutator(projectAt) {
+  var project,
+      k = 150, // scale
+      x = 480, y = 250, // translate
+      lambda = 0, phi = 0, // center
+      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
+      alpha = 0, // post-rotate
+      theta = null, preclip = clipAntimeridian, // pre-clip angle
+      x0 = null, y0, x1, y1, postclip = identity$4, // post-clip extent
+      delta2 = 0.5, // precision
+      projectResample,
+      projectTransform,
+      projectRotateTransform,
+      cache,
+      cacheStream;
+
+  function projection(point) {
+    return projectRotateTransform(point[0] * radians, point[1] * radians);
+  }
+
+  function invert(point) {
+    point = projectRotateTransform.invert(point[0], point[1]);
+    return point && [point[0] * degrees$1, point[1] * degrees$1];
+  }
+
+  projection.stream = function(stream) {
+    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
+  };
+
+  projection.preclip = function(_) {
+    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
+  };
+
+  projection.postclip = function(_) {
+    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+  };
+
+  projection.clipAngle = function(_) {
+    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
+  };
+
+  projection.clipExtent = function(_) {
+    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+  };
+
+  projection.scale = function(_) {
+    return arguments.length ? (k = +_, recenter()) : k;
+  };
+
+  projection.translate = function(_) {
+    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
+  };
+
+  projection.center = function(_) {
+    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
+  };
+
+  projection.rotate = function(_) {
+    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
+  };
+
+  projection.angle = function(_) {
+    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
+  };
+
+  projection.precision = function(_) {
+    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
+  };
+
+  projection.fitExtent = function(extent, object) {
+    return fitExtent(projection, extent, object);
+  };
+
+  projection.fitSize = function(size, object) {
+    return fitSize(projection, size, object);
+  };
+
+  projection.fitWidth = function(width, object) {
+    return fitWidth(projection, width, object);
+  };
+
+  projection.fitHeight = function(height, object) {
+    return fitHeight(projection, height, object);
+  };
+
+  function recenter() {
+    var center = scaleTranslateRotate(k, 0, 0, alpha).apply(null, project(lambda, phi)),
+        transform$$1 = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], alpha);
+    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
+    projectTransform = compose(project, transform$$1);
+    projectRotateTransform = compose(rotate, projectTransform);
+    projectResample = resample(projectTransform, delta2);
+    return reset();
+  }
+
+  function reset() {
+    cache = cacheStream = null;
+    return projection;
+  }
+
+  return function() {
+    project = projectAt.apply(this, arguments);
+    projection.invert = project.invert && invert;
+    return recenter();
+  };
+}
+
+function conicProjection(projectAt) {
+  var phi0 = 0,
+      phi1 = pi$3 / 3,
+      m = projectionMutator(projectAt),
+      p = m(phi0, phi1);
+
+  p.parallels = function(_) {
+    return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1];
+  };
+
+  return p;
+}
+
+function cylindricalEqualAreaRaw(phi0) {
+  var cosPhi0 = cos$1(phi0);
+
+  function forward(lambda, phi) {
+    return [lambda * cosPhi0, sin$1(phi) / cosPhi0];
+  }
+
+  forward.invert = function(x, y) {
+    return [x / cosPhi0, asin(y * cosPhi0)];
+  };
+
+  return forward;
+}
+
+function conicEqualAreaRaw(y0, y1) {
+  var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2;
+
+  // Are the parallels symmetrical around the Equator?
+  if (abs(n) < epsilon$2) return cylindricalEqualAreaRaw(y0);
+
+  var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt(c) / n;
+
+  function project(x, y) {
+    var r = sqrt(c - 2 * n * sin$1(y)) / n;
+    return [r * sin$1(x *= n), r0 - r * cos$1(x)];
+  }
+
+  project.invert = function(x, y) {
+    var r0y = r0 - y;
+    return [atan2(x, abs(r0y)) / n * sign(r0y), asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
+  };
+
+  return project;
+}
+
+function conicEqualArea() {
+  return conicProjection(conicEqualAreaRaw)
+      .scale(155.424)
+      .center([0, 33.6442]);
+}
+
+function albers() {
+  return conicEqualArea()
+      .parallels([29.5, 45.5])
+      .scale(1070)
+      .translate([480, 250])
+      .rotate([96, 0])
+      .center([-0.6, 38.7]);
+}
+
+// The projections must have mutually exclusive clip regions on the sphere,
+// as this will avoid emitting interleaving lines and polygons.
+function multiplex(streams) {
+  var n = streams.length;
+  return {
+    point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
+    sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
+    lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
+    lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
+    polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
+    polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
+  };
+}
+
+// A composite projection for the United States, configured by default for
+// 960×500. The projection also works quite well at 960×600 if you change the
+// scale to 1285 and adjust the translate accordingly. The set of standard
+// parallels for each region comes from USGS, which is published here:
+// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
+function albersUsa() {
+  var cache,
+      cacheStream,
+      lower48 = albers(), lower48Point,
+      alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
+      hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
+      point, pointStream = {point: function(x, y) { point = [x, y]; }};
+
+  function albersUsa(coordinates) {
+    var x = coordinates[0], y = coordinates[1];
+    return point = null, (lower48Point.point(x, y), point)
+        || (alaskaPoint.point(x, y), point)
+        || (hawaiiPoint.point(x, y), point);
+  }
+
+  albersUsa.invert = function(coordinates) {
+    var k = lower48.scale(),
+        t = lower48.translate(),
+        x = (coordinates[0] - t[0]) / k,
+        y = (coordinates[1] - t[1]) / k;
+    return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
+        : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
+        : lower48).invert(coordinates);
+  };
+
+  albersUsa.stream = function(stream) {
+    return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
+  };
+
+  albersUsa.precision = function(_) {
+    if (!arguments.length) return lower48.precision();
+    lower48.precision(_), alaska.precision(_), hawaii.precision(_);
+    return reset();
+  };
+
+  albersUsa.scale = function(_) {
+    if (!arguments.length) return lower48.scale();
+    lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
+    return albersUsa.translate(lower48.translate());
+  };
+
+  albersUsa.translate = function(_) {
+    if (!arguments.length) return lower48.translate();
+    var k = lower48.scale(), x = +_[0], y = +_[1];
+
+    lower48Point = lower48
+        .translate(_)
+        .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
+        .stream(pointStream);
+
+    alaskaPoint = alaska
+        .translate([x - 0.307 * k, y + 0.201 * k])
+        .clipExtent([[x - 0.425 * k + epsilon$2, y + 0.120 * k + epsilon$2], [x - 0.214 * k - epsilon$2, y + 0.234 * k - epsilon$2]])
+        .stream(pointStream);
+
+    hawaiiPoint = hawaii
+        .translate([x - 0.205 * k, y + 0.212 * k])
+        .clipExtent([[x - 0.214 * k + epsilon$2, y + 0.166 * k + epsilon$2], [x - 0.115 * k - epsilon$2, y + 0.234 * k - epsilon$2]])
+        .stream(pointStream);
+
+    return reset();
+  };
+
+  albersUsa.fitExtent = function(extent, object) {
+    return fitExtent(albersUsa, extent, object);
+  };
+
+  albersUsa.fitSize = function(size, object) {
+    return fitSize(albersUsa, size, object);
+  };
+
+  albersUsa.fitWidth = function(width, object) {
+    return fitWidth(albersUsa, width, object);
+  };
+
+  albersUsa.fitHeight = function(height, object) {
+    return fitHeight(albersUsa, height, object);
+  };
+
+  function reset() {
+    cache = cacheStream = null;
+    return albersUsa;
+  }
+
+  return albersUsa.scale(1070);
+}
+
+function azimuthalRaw(scale) {
+  return function(x, y) {
+    var cx = cos$1(x),
+        cy = cos$1(y),
+        k = scale(cx * cy);
+    return [
+      k * cy * sin$1(x),
+      k * sin$1(y)
+    ];
+  }
+}
+
+function azimuthalInvert(angle) {
+  return function(x, y) {
+    var z = sqrt(x * x + y * y),
+        c = angle(z),
+        sc = sin$1(c),
+        cc = cos$1(c);
+    return [
+      atan2(x * sc, z * cc),
+      asin(z && y * sc / z)
+    ];
+  }
+}
+
+var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {
+  return sqrt(2 / (1 + cxcy));
+});
+
+azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {
+  return 2 * asin(z / 2);
+});
+
+function azimuthalEqualArea() {
+  return projection(azimuthalEqualAreaRaw)
+      .scale(124.75)
+      .clipAngle(180 - 1e-3);
+}
+
+var azimuthalEquidistantRaw = azimuthalRaw(function(c) {
+  return (c = acos(c)) && c / sin$1(c);
+});
+
+azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {
+  return z;
+});
+
+function azimuthalEquidistant() {
+  return projection(azimuthalEquidistantRaw)
+      .scale(79.4188)
+      .clipAngle(180 - 1e-3);
+}
+
+function mercatorRaw(lambda, phi) {
+  return [lambda, log(tan((halfPi$2 + phi) / 2))];
+}
+
+mercatorRaw.invert = function(x, y) {
+  return [x, 2 * atan(exp(y)) - halfPi$2];
+};
+
+function mercator() {
+  return mercatorProjection(mercatorRaw)
+      .scale(961 / tau$3);
+}
+
+function mercatorProjection(project) {
+  var m = projection(project),
+      center = m.center,
+      scale = m.scale,
+      translate = m.translate,
+      clipExtent = m.clipExtent,
+      x0 = null, y0, x1, y1; // clip extent
+
+  m.scale = function(_) {
+    return arguments.length ? (scale(_), reclip()) : scale();
+  };
+
+  m.translate = function(_) {
+    return arguments.length ? (translate(_), reclip()) : translate();
+  };
+
+  m.center = function(_) {
+    return arguments.length ? (center(_), reclip()) : center();
+  };
+
+  m.clipExtent = function(_) {
+    return arguments.length ? (_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+  };
+
+  function reclip() {
+    var k = pi$3 * scale(),
+        t = m(rotation(m.rotate()).invert([0, 0]));
+    return clipExtent(x0 == null
+        ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw
+        ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
+        : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
+  }
+
+  return reclip();
+}
+
+function tany(y) {
+  return tan((halfPi$2 + y) / 2);
+}
+
+function conicConformalRaw(y0, y1) {
+  var cy0 = cos$1(y0),
+      n = y0 === y1 ? sin$1(y0) : log(cy0 / cos$1(y1)) / log(tany(y1) / tany(y0)),
+      f = cy0 * pow(tany(y0), n) / n;
+
+  if (!n) return mercatorRaw;
+
+  function project(x, y) {
+    if (f > 0) { if (y < -halfPi$2 + epsilon$2) y = -halfPi$2 + epsilon$2; }
+    else { if (y > halfPi$2 - epsilon$2) y = halfPi$2 - epsilon$2; }
+    var r = f / pow(tany(y), n);
+    return [r * sin$1(n * x), f - r * cos$1(n * x)];
+  }
+
+  project.invert = function(x, y) {
+    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy);
+    return [atan2(x, abs(fy)) / n * sign(fy), 2 * atan(pow(f / r, 1 / n)) - halfPi$2];
+  };
+
+  return project;
+}
+
+function conicConformal() {
+  return conicProjection(conicConformalRaw)
+      .scale(109.5)
+      .parallels([30, 30]);
+}
+
+function equirectangularRaw(lambda, phi) {
+  return [lambda, phi];
+}
+
+equirectangularRaw.invert = equirectangularRaw;
+
+function equirectangular() {
+  return projection(equirectangularRaw)
+      .scale(152.63);
+}
+
+function conicEquidistantRaw(y0, y1) {
+  var cy0 = cos$1(y0),
+      n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),
+      g = cy0 / n + y0;
+
+  if (abs(n) < epsilon$2) return equirectangularRaw;
+
+  function project(x, y) {
+    var gy = g - y, nx = n * x;
+    return [gy * sin$1(nx), g - gy * cos$1(nx)];
+  }
+
+  project.invert = function(x, y) {
+    var gy = g - y;
+    return [atan2(x, abs(gy)) / n * sign(gy), g - sign(n) * sqrt(x * x + gy * gy)];
+  };
+
+  return project;
+}
+
+function conicEquidistant() {
+  return conicProjection(conicEquidistantRaw)
+      .scale(131.154)
+      .center([0, 13.9389]);
+}
+
+function gnomonicRaw(x, y) {
+  var cy = cos$1(y), k = cos$1(x) * cy;
+  return [cy * sin$1(x) / k, sin$1(y) / k];
+}
+
+gnomonicRaw.invert = azimuthalInvert(atan);
+
+function gnomonic() {
+  return projection(gnomonicRaw)
+      .scale(144.049)
+      .clipAngle(60);
+}
+
+function scaleTranslate$1(kx, ky, tx, ty) {
+  return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({
+    point: function(x, y) {
+      this.stream.point(x * kx + tx, y * ky + ty);
+    }
+  });
+}
+
+function identity$5() {
+  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform$$1 = identity$4, // scale, translate and reflect
+      x0 = null, y0, x1, y1, // clip extent
+      postclip = identity$4,
+      cache,
+      cacheStream,
+      projection;
+
+  function reset() {
+    cache = cacheStream = null;
+    return projection;
+  }
+
+  return projection = {
+    stream: function(stream) {
+      return cache && cacheStream === stream ? cache : cache = transform$$1(postclip(cacheStream = stream));
+    },
+    postclip: function(_) {
+      return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+    },
+    clipExtent: function(_) {
+      return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+    },
+    scale: function(_) {
+      return arguments.length ? (transform$$1 = scaleTranslate$1((k = +_) * sx, k * sy, tx, ty), reset()) : k;
+    },
+    translate: function(_) {
+      return arguments.length ? (transform$$1 = scaleTranslate$1(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];
+    },
+    reflectX: function(_) {
+      return arguments.length ? (transform$$1 = scaleTranslate$1(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;
+    },
+    reflectY: function(_) {
+      return arguments.length ? (transform$$1 = scaleTranslate$1(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;
+    },
+    fitExtent: function(extent, object) {
+      return fitExtent(projection, extent, object);
+    },
+    fitSize: function(size, object) {
+      return fitSize(projection, size, object);
+    },
+    fitWidth: function(width, object) {
+      return fitWidth(projection, width, object);
+    },
+    fitHeight: function(height, object) {
+      return fitHeight(projection, height, object);
+    }
+  };
+}
+
+function naturalEarth1Raw(lambda, phi) {
+  var phi2 = phi * phi, phi4 = phi2 * phi2;
+  return [
+    lambda * (0.8707 - 0.131979 * phi2 + phi4 * (-0.013791 + phi4 * (0.003971 * phi2 - 0.001529 * phi4))),
+    phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4)))
+  ];
+}
+
+naturalEarth1Raw.invert = function(x, y) {
+  var phi = y, i = 25, delta;
+  do {
+    var phi2 = phi * phi, phi4 = phi2 * phi2;
+    phi -= delta = (phi * (1.007226 + phi2 * (0.015085 + phi4 * (-0.044475 + 0.028874 * phi2 - 0.005916 * phi4))) - y) /
+        (1.007226 + phi2 * (0.015085 * 3 + phi4 * (-0.044475 * 7 + 0.028874 * 9 * phi2 - 0.005916 * 11 * phi4)));
+  } while (abs(delta) > epsilon$2 && --i > 0);
+  return [
+    x / (0.8707 + (phi2 = phi * phi) * (-0.131979 + phi2 * (-0.013791 + phi2 * phi2 * phi2 * (0.003971 - 0.001529 * phi2)))),
+    phi
+  ];
+};
+
+function naturalEarth1() {
+  return projection(naturalEarth1Raw)
+      .scale(175.295);
+}
+
+function orthographicRaw(x, y) {
+  return [cos$1(y) * sin$1(x), sin$1(y)];
+}
+
+orthographicRaw.invert = azimuthalInvert(asin);
+
+function orthographic() {
+  return projection(orthographicRaw)
+      .scale(249.5)
+      .clipAngle(90 + epsilon$2);
+}
+
+function stereographicRaw(x, y) {
+  var cy = cos$1(y), k = 1 + cos$1(x) * cy;
+  return [cy * sin$1(x) / k, sin$1(y) / k];
+}
+
+stereographicRaw.invert = azimuthalInvert(function(z) {
+  return 2 * atan(z);
+});
+
+function stereographic() {
+  return projection(stereographicRaw)
+      .scale(250)
+      .clipAngle(142);
+}
+
+function transverseMercatorRaw(lambda, phi) {
+  return [log(tan((halfPi$2 + phi) / 2)), -lambda];
+}
+
+transverseMercatorRaw.invert = function(x, y) {
+  return [-y, 2 * atan(exp(x)) - halfPi$2];
+};
+
+function transverseMercator() {
+  var m = mercatorProjection(transverseMercatorRaw),
+      center = m.center,
+      rotate = m.rotate;
+
+  m.center = function(_) {
+    return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
+  };
+
+  m.rotate = function(_) {
+    return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
+  };
+
+  return rotate([0, 0, 90])
+      .scale(159.155);
+}
+
+function defaultSeparation(a, b) {
+  return a.parent === b.parent ? 1 : 2;
+}
+
+function meanX(children) {
+  return children.reduce(meanXReduce, 0) / children.length;
+}
+
+function meanXReduce(x, c) {
+  return x + c.x;
+}
+
+function maxY(children) {
+  return 1 + children.reduce(maxYReduce, 0);
+}
+
+function maxYReduce(y, c) {
+  return Math.max(y, c.y);
+}
+
+function leafLeft(node) {
+  var children;
+  while (children = node.children) node = children[0];
+  return node;
+}
+
+function leafRight(node) {
+  var children;
+  while (children = node.children) node = children[children.length - 1];
+  return node;
+}
+
+function cluster() {
+  var separation = defaultSeparation,
+      dx = 1,
+      dy = 1,
+      nodeSize = false;
+
+  function cluster(root) {
+    var previousNode,
+        x = 0;
+
+    // First walk, computing the initial x & y values.
+    root.eachAfter(function(node) {
+      var children = node.children;
+      if (children) {
+        node.x = meanX(children);
+        node.y = maxY(children);
+      } else {
+        node.x = previousNode ? x += separation(node, previousNode) : 0;
+        node.y = 0;
+        previousNode = node;
+      }
+    });
+
+    var left = leafLeft(root),
+        right = leafRight(root),
+        x0 = left.x - separation(left, right) / 2,
+        x1 = right.x + separation(right, left) / 2;
+
+    // Second walk, normalizing x & y to the desired size.
+    return root.eachAfter(nodeSize ? function(node) {
+      node.x = (node.x - root.x) * dx;
+      node.y = (root.y - node.y) * dy;
+    } : function(node) {
+      node.x = (node.x - x0) / (x1 - x0) * dx;
+      node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;
+    });
+  }
+
+  cluster.separation = function(x) {
+    return arguments.length ? (separation = x, cluster) : separation;
+  };
+
+  cluster.size = function(x) {
+    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);
+  };
+
+  cluster.nodeSize = function(x) {
+    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);
+  };
+
+  return cluster;
+}
+
+function count(node) {
+  var sum = 0,
+      children = node.children,
+      i = children && children.length;
+  if (!i) sum = 1;
+  else while (--i >= 0) sum += children[i].value;
+  node.value = sum;
+}
+
+function node_count() {
+  return this.eachAfter(count);
+}
+
+function node_each(callback) {
+  var node = this, current, next = [node], children, i, n;
+  do {
+    current = next.reverse(), next = [];
+    while (node = current.pop()) {
+      callback(node), children = node.children;
+      if (children) for (i = 0, n = children.length; i < n; ++i) {
+        next.push(children[i]);
+      }
+    }
+  } while (next.length);
+  return this;
+}
+
+function node_eachBefore(callback) {
+  var node = this, nodes = [node], children, i;
+  while (node = nodes.pop()) {
+    callback(node), children = node.children;
+    if (children) for (i = children.length - 1; i >= 0; --i) {
+      nodes.push(children[i]);
+    }
+  }
+  return this;
+}
+
+function node_eachAfter(callback) {
+  var node = this, nodes = [node], next = [], children, i, n;
+  while (node = nodes.pop()) {
+    next.push(node), children = node.children;
+    if (children) for (i = 0, n = children.length; i < n; ++i) {
+      nodes.push(children[i]);
+    }
+  }
+  while (node = next.pop()) {
+    callback(node);
+  }
+  return this;
+}
+
+function node_sum(value) {
+  return this.eachAfter(function(node) {
+    var sum = +value(node.data) || 0,
+        children = node.children,
+        i = children && children.length;
+    while (--i >= 0) sum += children[i].value;
+    node.value = sum;
+  });
+}
+
+function node_sort(compare) {
+  return this.eachBefore(function(node) {
+    if (node.children) {
+      node.children.sort(compare);
+    }
+  });
+}
+
+function node_path(end) {
+  var start = this,
+      ancestor = leastCommonAncestor(start, end),
+      nodes = [start];
+  while (start !== ancestor) {
+    start = start.parent;
+    nodes.push(start);
+  }
+  var k = nodes.length;
+  while (end !== ancestor) {
+    nodes.splice(k, 0, end);
+    end = end.parent;
+  }
+  return nodes;
+}
+
+function leastCommonAncestor(a, b) {
+  if (a === b) return a;
+  var aNodes = a.ancestors(),
+      bNodes = b.ancestors(),
+      c = null;
+  a = aNodes.pop();
+  b = bNodes.pop();
+  while (a === b) {
+    c = a;
+    a = aNodes.pop();
+    b = bNodes.pop();
+  }
+  return c;
+}
+
+function node_ancestors() {
+  var node = this, nodes = [node];
+  while (node = node.parent) {
+    nodes.push(node);
+  }
+  return nodes;
+}
+
+function node_descendants() {
+  var nodes = [];
+  this.each(function(node) {
+    nodes.push(node);
+  });
+  return nodes;
+}
+
+function node_leaves() {
+  var leaves = [];
+  this.eachBefore(function(node) {
+    if (!node.children) {
+      leaves.push(node);
+    }
+  });
+  return leaves;
+}
+
+function node_links() {
+  var root = this, links = [];
+  root.each(function(node) {
+    if (node !== root) { // Don’t include the root’s parent, if any.
+      links.push({source: node.parent, target: node});
+    }
+  });
+  return links;
+}
+
+function hierarchy(data, children) {
+  var root = new Node(data),
+      valued = +data.value && (root.value = data.value),
+      node,
+      nodes = [root],
+      child,
+      childs,
+      i,
+      n;
+
+  if (children == null) children = defaultChildren;
+
+  while (node = nodes.pop()) {
+    if (valued) node.value = +node.data.value;
+    if ((childs = children(node.data)) && (n = childs.length)) {
+      node.children = new Array(n);
+      for (i = n - 1; i >= 0; --i) {
+        nodes.push(child = node.children[i] = new Node(childs[i]));
+        child.parent = node;
+        child.depth = node.depth + 1;
+      }
+    }
+  }
+
+  return root.eachBefore(computeHeight);
+}
+
+function node_copy() {
+  return hierarchy(this).eachBefore(copyData);
+}
+
+function defaultChildren(d) {
+  return d.children;
+}
+
+function copyData(node) {
+  node.data = node.data.data;
+}
+
+function computeHeight(node) {
+  var height = 0;
+  do node.height = height;
+  while ((node = node.parent) && (node.height < ++height));
+}
+
+function Node(data) {
+  this.data = data;
+  this.depth =
+  this.height = 0;
+  this.parent = null;
+}
+
+Node.prototype = hierarchy.prototype = {
+  constructor: Node,
+  count: node_count,
+  each: node_each,
+  eachAfter: node_eachAfter,
+  eachBefore: node_eachBefore,
+  sum: node_sum,
+  sort: node_sort,
+  path: node_path,
+  ancestors: node_ancestors,
+  descendants: node_descendants,
+  leaves: node_leaves,
+  links: node_links,
+  copy: node_copy
+};
+
+var slice$4 = Array.prototype.slice;
+
+function shuffle$1(array) {
+  var m = array.length,
+      t,
+      i;
+
+  while (m) {
+    i = Math.random() * m-- | 0;
+    t = array[m];
+    array[m] = array[i];
+    array[i] = t;
+  }
+
+  return array;
+}
+
+function enclose(circles) {
+  var i = 0, n = (circles = shuffle$1(slice$4.call(circles))).length, B = [], p, e;
+
+  while (i < n) {
+    p = circles[i];
+    if (e && enclosesWeak(e, p)) ++i;
+    else e = encloseBasis(B = extendBasis(B, p)), i = 0;
+  }
+
+  return e;
+}
+
+function extendBasis(B, p) {
+  var i, j;
+
+  if (enclosesWeakAll(p, B)) return [p];
+
+  // If we get here then B must have at least one element.
+  for (i = 0; i < B.length; ++i) {
+    if (enclosesNot(p, B[i])
+        && enclosesWeakAll(encloseBasis2(B[i], p), B)) {
+      return [B[i], p];
+    }
+  }
+
+  // If we get here then B must have at least two elements.
+  for (i = 0; i < B.length - 1; ++i) {
+    for (j = i + 1; j < B.length; ++j) {
+      if (enclosesNot(encloseBasis2(B[i], B[j]), p)
+          && enclosesNot(encloseBasis2(B[i], p), B[j])
+          && enclosesNot(encloseBasis2(B[j], p), B[i])
+          && enclosesWeakAll(encloseBasis3(B[i], B[j], p), B)) {
+        return [B[i], B[j], p];
+      }
+    }
+  }
+
+  // If we get here then something is very wrong.
+  throw new Error;
+}
+
+function enclosesNot(a, b) {
+  var dr = a.r - b.r, dx = b.x - a.x, dy = b.y - a.y;
+  return dr < 0 || dr * dr < dx * dx + dy * dy;
+}
+
+function enclosesWeak(a, b) {
+  var dr = a.r - b.r + 1e-6, dx = b.x - a.x, dy = b.y - a.y;
+  return dr > 0 && dr * dr > dx * dx + dy * dy;
+}
+
+function enclosesWeakAll(a, B) {
+  for (var i = 0; i < B.length; ++i) {
+    if (!enclosesWeak(a, B[i])) {
+      return false;
+    }
+  }
+  return true;
+}
+
+function encloseBasis(B) {
+  switch (B.length) {
+    case 1: return encloseBasis1(B[0]);
+    case 2: return encloseBasis2(B[0], B[1]);
+    case 3: return encloseBasis3(B[0], B[1], B[2]);
+  }
+}
+
+function encloseBasis1(a) {
+  return {
+    x: a.x,
+    y: a.y,
+    r: a.r
+  };
+}
+
+function encloseBasis2(a, b) {
+  var x1 = a.x, y1 = a.y, r1 = a.r,
+      x2 = b.x, y2 = b.y, r2 = b.r,
+      x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,
+      l = Math.sqrt(x21 * x21 + y21 * y21);
+  return {
+    x: (x1 + x2 + x21 / l * r21) / 2,
+    y: (y1 + y2 + y21 / l * r21) / 2,
+    r: (l + r1 + r2) / 2
+  };
+}
+
+function encloseBasis3(a, b, c) {
+  var x1 = a.x, y1 = a.y, r1 = a.r,
+      x2 = b.x, y2 = b.y, r2 = b.r,
+      x3 = c.x, y3 = c.y, r3 = c.r,
+      a2 = x1 - x2,
+      a3 = x1 - x3,
+      b2 = y1 - y2,
+      b3 = y1 - y3,
+      c2 = r2 - r1,
+      c3 = r3 - r1,
+      d1 = x1 * x1 + y1 * y1 - r1 * r1,
+      d2 = d1 - x2 * x2 - y2 * y2 + r2 * r2,
+      d3 = d1 - x3 * x3 - y3 * y3 + r3 * r3,
+      ab = a3 * b2 - a2 * b3,
+      xa = (b2 * d3 - b3 * d2) / (ab * 2) - x1,
+      xb = (b3 * c2 - b2 * c3) / ab,
+      ya = (a3 * d2 - a2 * d3) / (ab * 2) - y1,
+      yb = (a2 * c3 - a3 * c2) / ab,
+      A = xb * xb + yb * yb - 1,
+      B = 2 * (r1 + xa * xb + ya * yb),
+      C = xa * xa + ya * ya - r1 * r1,
+      r = -(A ? (B + Math.sqrt(B * B - 4 * A * C)) / (2 * A) : C / B);
+  return {
+    x: x1 + xa + xb * r,
+    y: y1 + ya + yb * r,
+    r: r
+  };
+}
+
+function place(b, a, c) {
+  var dx = b.x - a.x, x, a2,
+      dy = b.y - a.y, y, b2,
+      d2 = dx * dx + dy * dy;
+  if (d2) {
+    a2 = a.r + c.r, a2 *= a2;
+    b2 = b.r + c.r, b2 *= b2;
+    if (a2 > b2) {
+      x = (d2 + b2 - a2) / (2 * d2);
+      y = Math.sqrt(Math.max(0, b2 / d2 - x * x));
+      c.x = b.x - x * dx - y * dy;
+      c.y = b.y - x * dy + y * dx;
+    } else {
+      x = (d2 + a2 - b2) / (2 * d2);
+      y = Math.sqrt(Math.max(0, a2 / d2 - x * x));
+      c.x = a.x + x * dx - y * dy;
+      c.y = a.y + x * dy + y * dx;
+    }
+  } else {
+    c.x = a.x + c.r;
+    c.y = a.y;
+  }
+}
+
+function intersects(a, b) {
+  var dr = a.r + b.r - 1e-6, dx = b.x - a.x, dy = b.y - a.y;
+  return dr > 0 && dr * dr > dx * dx + dy * dy;
+}
+
+function score(node) {
+  var a = node._,
+      b = node.next._,
+      ab = a.r + b.r,
+      dx = (a.x * b.r + b.x * a.r) / ab,
+      dy = (a.y * b.r + b.y * a.r) / ab;
+  return dx * dx + dy * dy;
+}
+
+function Node$1(circle) {
+  this._ = circle;
+  this.next = null;
+  this.previous = null;
+}
+
+function packEnclose(circles) {
+  if (!(n = circles.length)) return 0;
+
+  var a, b, c, n, aa, ca, i, j, k, sj, sk;
+
+  // Place the first circle.
+  a = circles[0], a.x = 0, a.y = 0;
+  if (!(n > 1)) return a.r;
+
+  // Place the second circle.
+  b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;
+  if (!(n > 2)) return a.r + b.r;
+
+  // Place the third circle.
+  place(b, a, c = circles[2]);
+
+  // Initialize the front-chain using the first three circles a, b and c.
+  a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);
+  a.next = c.previous = b;
+  b.next = a.previous = c;
+  c.next = b.previous = a;
+
+  // Attempt to place each remaining circle…
+  pack: for (i = 3; i < n; ++i) {
+    place(a._, b._, c = circles[i]), c = new Node$1(c);
+
+    // Find the closest intersecting circle on the front-chain, if any.
+    // “Closeness” is determined by linear distance along the front-chain.
+    // “Ahead” or “behind” is likewise determined by linear distance.
+    j = b.next, k = a.previous, sj = b._.r, sk = a._.r;
+    do {
+      if (sj <= sk) {
+        if (intersects(j._, c._)) {
+          b = j, a.next = b, b.previous = a, --i;
+          continue pack;
+        }
+        sj += j._.r, j = j.next;
+      } else {
+        if (intersects(k._, c._)) {
+          a = k, a.next = b, b.previous = a, --i;
+          continue pack;
+        }
+        sk += k._.r, k = k.previous;
+      }
+    } while (j !== k.next);
+
+    // Success! Insert the new circle c between a and b.
+    c.previous = a, c.next = b, a.next = b.previous = b = c;
+
+    // Compute the new closest circle pair to the centroid.
+    aa = score(a);
+    while ((c = c.next) !== b) {
+      if ((ca = score(c)) < aa) {
+        a = c, aa = ca;
+      }
+    }
+    b = a.next;
+  }
+
+  // Compute the enclosing circle of the front chain.
+  a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = enclose(a);
+
+  // Translate the circles to put the enclosing circle around the origin.
+  for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;
+
+  return c.r;
+}
+
+function siblings(circles) {
+  packEnclose(circles);
+  return circles;
+}
+
+function optional(f) {
+  return f == null ? null : required(f);
+}
+
+function required(f) {
+  if (typeof f !== "function") throw new Error;
+  return f;
+}
+
+function constantZero() {
+  return 0;
+}
+
+function constant$9(x) {
+  return function() {
+    return x;
+  };
+}
+
+function defaultRadius$1(d) {
+  return Math.sqrt(d.value);
+}
+
+function index$2() {
+  var radius = null,
+      dx = 1,
+      dy = 1,
+      padding = constantZero;
+
+  function pack(root) {
+    root.x = dx / 2, root.y = dy / 2;
+    if (radius) {
+      root.eachBefore(radiusLeaf(radius))
+          .eachAfter(packChildren(padding, 0.5))
+          .eachBefore(translateChild(1));
+    } else {
+      root.eachBefore(radiusLeaf(defaultRadius$1))
+          .eachAfter(packChildren(constantZero, 1))
+          .eachAfter(packChildren(padding, root.r / Math.min(dx, dy)))
+          .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));
+    }
+    return root;
+  }
+
+  pack.radius = function(x) {
+    return arguments.length ? (radius = optional(x), pack) : radius;
+  };
+
+  pack.size = function(x) {
+    return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
+  };
+
+  pack.padding = function(x) {
+    return arguments.length ? (padding = typeof x === "function" ? x : constant$9(+x), pack) : padding;
+  };
+
+  return pack;
+}
+
+function radiusLeaf(radius) {
+  return function(node) {
+    if (!node.children) {
+      node.r = Math.max(0, +radius(node) || 0);
+    }
+  };
+}
+
+function packChildren(padding, k) {
+  return function(node) {
+    if (children = node.children) {
+      var children,
+          i,
+          n = children.length,
+          r = padding(node) * k || 0,
+          e;
+
+      if (r) for (i = 0; i < n; ++i) children[i].r += r;
+      e = packEnclose(children);
+      if (r) for (i = 0; i < n; ++i) children[i].r -= r;
+      node.r = e + r;
+    }
+  };
+}
+
+function translateChild(k) {
+  return function(node) {
+    var parent = node.parent;
+    node.r *= k;
+    if (parent) {
+      node.x = parent.x + k * node.x;
+      node.y = parent.y + k * node.y;
+    }
+  };
+}
+
+function roundNode(node) {
+  node.x0 = Math.round(node.x0);
+  node.y0 = Math.round(node.y0);
+  node.x1 = Math.round(node.x1);
+  node.y1 = Math.round(node.y1);
+}
+
+function treemapDice(parent, x0, y0, x1, y1) {
+  var nodes = parent.children,
+      node,
+      i = -1,
+      n = nodes.length,
+      k = parent.value && (x1 - x0) / parent.value;
+
+  while (++i < n) {
+    node = nodes[i], node.y0 = y0, node.y1 = y1;
+    node.x0 = x0, node.x1 = x0 += node.value * k;
+  }
+}
+
+function partition() {
+  var dx = 1,
+      dy = 1,
+      padding = 0,
+      round = false;
+
+  function partition(root) {
+    var n = root.height + 1;
+    root.x0 =
+    root.y0 = padding;
+    root.x1 = dx;
+    root.y1 = dy / n;
+    root.eachBefore(positionNode(dy, n));
+    if (round) root.eachBefore(roundNode);
+    return root;
+  }
+
+  function positionNode(dy, n) {
+    return function(node) {
+      if (node.children) {
+        treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
+      }
+      var x0 = node.x0,
+          y0 = node.y0,
+          x1 = node.x1 - padding,
+          y1 = node.y1 - padding;
+      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+      node.x0 = x0;
+      node.y0 = y0;
+      node.x1 = x1;
+      node.y1 = y1;
+    };
+  }
+
+  partition.round = function(x) {
+    return arguments.length ? (round = !!x, partition) : round;
+  };
+
+  partition.size = function(x) {
+    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
+  };
+
+  partition.padding = function(x) {
+    return arguments.length ? (padding = +x, partition) : padding;
+  };
+
+  return partition;
+}
+
+var keyPrefix$1 = "$", // Protect against keys like “__proto__”.
+    preroot = {depth: -1},
+    ambiguous = {};
+
+function defaultId(d) {
+  return d.id;
+}
+
+function defaultParentId(d) {
+  return d.parentId;
+}
+
+function stratify() {
+  var id = defaultId,
+      parentId = defaultParentId;
+
+  function stratify(data) {
+    var d,
+        i,
+        n = data.length,
+        root,
+        parent,
+        node,
+        nodes = new Array(n),
+        nodeId,
+        nodeKey,
+        nodeByKey = {};
+
+    for (i = 0; i < n; ++i) {
+      d = data[i], node = nodes[i] = new Node(d);
+      if ((nodeId = id(d, i, data)) != null && (nodeId += "")) {
+        nodeKey = keyPrefix$1 + (node.id = nodeId);
+        nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;
+      }
+    }
+
+    for (i = 0; i < n; ++i) {
+      node = nodes[i], nodeId = parentId(data[i], i, data);
+      if (nodeId == null || !(nodeId += "")) {
+        if (root) throw new Error("multiple roots");
+        root = node;
+      } else {
+        parent = nodeByKey[keyPrefix$1 + nodeId];
+        if (!parent) throw new Error("missing: " + nodeId);
+        if (parent === ambiguous) throw new Error("ambiguous: " + nodeId);
+        if (parent.children) parent.children.push(node);
+        else parent.children = [node];
+        node.parent = parent;
+      }
+    }
+
+    if (!root) throw new Error("no root");
+    root.parent = preroot;
+    root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(computeHeight);
+    root.parent = null;
+    if (n > 0) throw new Error("cycle");
+
+    return root;
+  }
+
+  stratify.id = function(x) {
+    return arguments.length ? (id = required(x), stratify) : id;
+  };
+
+  stratify.parentId = function(x) {
+    return arguments.length ? (parentId = required(x), stratify) : parentId;
+  };
+
+  return stratify;
+}
+
+function defaultSeparation$1(a, b) {
+  return a.parent === b.parent ? 1 : 2;
+}
+
+// function radialSeparation(a, b) {
+//   return (a.parent === b.parent ? 1 : 2) / a.depth;
+// }
+
+// This function is used to traverse the left contour of a subtree (or
+// subforest). It returns the successor of v on this contour. This successor is
+// either given by the leftmost child of v or by the thread of v. The function
+// returns null if and only if v is on the highest level of its subtree.
+function nextLeft(v) {
+  var children = v.children;
+  return children ? children[0] : v.t;
+}
+
+// This function works analogously to nextLeft.
+function nextRight(v) {
+  var children = v.children;
+  return children ? children[children.length - 1] : v.t;
+}
+
+// Shifts the current subtree rooted at w+. This is done by increasing
+// prelim(w+) and mod(w+) by shift.
+function moveSubtree(wm, wp, shift) {
+  var change = shift / (wp.i - wm.i);
+  wp.c -= change;
+  wp.s += shift;
+  wm.c += change;
+  wp.z += shift;
+  wp.m += shift;
+}
+
+// All other shifts, applied to the smaller subtrees between w- and w+, are
+// performed by this function. To prepare the shifts, we have to adjust
+// change(w+), shift(w+), and change(w-).
+function executeShifts(v) {
+  var shift = 0,
+      change = 0,
+      children = v.children,
+      i = children.length,
+      w;
+  while (--i >= 0) {
+    w = children[i];
+    w.z += shift;
+    w.m += shift;
+    shift += w.s + (change += w.c);
+  }
+}
+
+// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,
+// returns the specified (default) ancestor.
+function nextAncestor(vim, v, ancestor) {
+  return vim.a.parent === v.parent ? vim.a : ancestor;
+}
+
+function TreeNode(node, i) {
+  this._ = node;
+  this.parent = null;
+  this.children = null;
+  this.A = null; // default ancestor
+  this.a = this; // ancestor
+  this.z = 0; // prelim
+  this.m = 0; // mod
+  this.c = 0; // change
+  this.s = 0; // shift
+  this.t = null; // thread
+  this.i = i; // number
+}
+
+TreeNode.prototype = Object.create(Node.prototype);
+
+function treeRoot(root) {
+  var tree = new TreeNode(root, 0),
+      node,
+      nodes = [tree],
+      child,
+      children,
+      i,
+      n;
+
+  while (node = nodes.pop()) {
+    if (children = node._.children) {
+      node.children = new Array(n = children.length);
+      for (i = n - 1; i >= 0; --i) {
+        nodes.push(child = node.children[i] = new TreeNode(children[i], i));
+        child.parent = node;
+      }
+    }
+  }
+
+  (tree.parent = new TreeNode(null, 0)).children = [tree];
+  return tree;
+}
+
+// Node-link tree diagram using the Reingold-Tilford "tidy" algorithm
+function tree() {
+  var separation = defaultSeparation$1,
+      dx = 1,
+      dy = 1,
+      nodeSize = null;
+
+  function tree(root) {
+    var t = treeRoot(root);
+
+    // Compute the layout using Buchheim et al.’s algorithm.
+    t.eachAfter(firstWalk), t.parent.m = -t.z;
+    t.eachBefore(secondWalk);
+
+    // If a fixed node size is specified, scale x and y.
+    if (nodeSize) root.eachBefore(sizeNode);
+
+    // If a fixed tree size is specified, scale x and y based on the extent.
+    // Compute the left-most, right-most, and depth-most nodes for extents.
+    else {
+      var left = root,
+          right = root,
+          bottom = root;
+      root.eachBefore(function(node) {
+        if (node.x < left.x) left = node;
+        if (node.x > right.x) right = node;
+        if (node.depth > bottom.depth) bottom = node;
+      });
+      var s = left === right ? 1 : separation(left, right) / 2,
+          tx = s - left.x,
+          kx = dx / (right.x + s + tx),
+          ky = dy / (bottom.depth || 1);
+      root.eachBefore(function(node) {
+        node.x = (node.x + tx) * kx;
+        node.y = node.depth * ky;
+      });
+    }
+
+    return root;
+  }
+
+  // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is
+  // applied recursively to the children of v, as well as the function
+  // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the
+  // node v is placed to the midpoint of its outermost children.
+  function firstWalk(v) {
+    var children = v.children,
+        siblings = v.parent.children,
+        w = v.i ? siblings[v.i - 1] : null;
+    if (children) {
+      executeShifts(v);
+      var midpoint = (children[0].z + children[children.length - 1].z) / 2;
+      if (w) {
+        v.z = w.z + separation(v._, w._);
+        v.m = v.z - midpoint;
+      } else {
+        v.z = midpoint;
+      }
+    } else if (w) {
+      v.z = w.z + separation(v._, w._);
+    }
+    v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
+  }
+
+  // Computes all real x-coordinates by summing up the modifiers recursively.
+  function secondWalk(v) {
+    v._.x = v.z + v.parent.m;
+    v.m += v.parent.m;
+  }
+
+  // The core of the algorithm. Here, a new subtree is combined with the
+  // previous subtrees. Threads are used to traverse the inside and outside
+  // contours of the left and right subtree up to the highest common level. The
+  // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the
+  // superscript o means outside and i means inside, the subscript - means left
+  // subtree and + means right subtree. For summing up the modifiers along the
+  // contour, we use respective variables si+, si-, so-, and so+. Whenever two
+  // nodes of the inside contours conflict, we compute the left one of the
+  // greatest uncommon ancestors using the function ANCESTOR and call MOVE
+  // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.
+  // Finally, we add a new thread (if necessary).
+  function apportion(v, w, ancestor) {
+    if (w) {
+      var vip = v,
+          vop = v,
+          vim = w,
+          vom = vip.parent.children[0],
+          sip = vip.m,
+          sop = vop.m,
+          sim = vim.m,
+          som = vom.m,
+          shift;
+      while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {
+        vom = nextLeft(vom);
+        vop = nextRight(vop);
+        vop.a = v;
+        shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
+        if (shift > 0) {
+          moveSubtree(nextAncestor(vim, v, ancestor), v, shift);
+          sip += shift;
+          sop += shift;
+        }
+        sim += vim.m;
+        sip += vip.m;
+        som += vom.m;
+        sop += vop.m;
+      }
+      if (vim && !nextRight(vop)) {
+        vop.t = vim;
+        vop.m += sim - sop;
+      }
+      if (vip && !nextLeft(vom)) {
+        vom.t = vip;
+        vom.m += sip - som;
+        ancestor = v;
+      }
+    }
+    return ancestor;
+  }
+
+  function sizeNode(node) {
+    node.x *= dx;
+    node.y = node.depth * dy;
+  }
+
+  tree.separation = function(x) {
+    return arguments.length ? (separation = x, tree) : separation;
+  };
+
+  tree.size = function(x) {
+    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);
+  };
+
+  tree.nodeSize = function(x) {
+    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);
+  };
+
+  return tree;
+}
+
+function treemapSlice(parent, x0, y0, x1, y1) {
+  var nodes = parent.children,
+      node,
+      i = -1,
+      n = nodes.length,
+      k = parent.value && (y1 - y0) / parent.value;
+
+  while (++i < n) {
+    node = nodes[i], node.x0 = x0, node.x1 = x1;
+    node.y0 = y0, node.y1 = y0 += node.value * k;
+  }
+}
+
+var phi = (1 + Math.sqrt(5)) / 2;
+
+function squarifyRatio(ratio, parent, x0, y0, x1, y1) {
+  var rows = [],
+      nodes = parent.children,
+      row,
+      nodeValue,
+      i0 = 0,
+      i1 = 0,
+      n = nodes.length,
+      dx, dy,
+      value = parent.value,
+      sumValue,
+      minValue,
+      maxValue,
+      newRatio,
+      minRatio,
+      alpha,
+      beta;
+
+  while (i0 < n) {
+    dx = x1 - x0, dy = y1 - y0;
+
+    // Find the next non-empty node.
+    do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);
+    minValue = maxValue = sumValue;
+    alpha = Math.max(dy / dx, dx / dy) / (value * ratio);
+    beta = sumValue * sumValue * alpha;
+    minRatio = Math.max(maxValue / beta, beta / minValue);
+
+    // Keep adding nodes while the aspect ratio maintains or improves.
+    for (; i1 < n; ++i1) {
+      sumValue += nodeValue = nodes[i1].value;
+      if (nodeValue < minValue) minValue = nodeValue;
+      if (nodeValue > maxValue) maxValue = nodeValue;
+      beta = sumValue * sumValue * alpha;
+      newRatio = Math.max(maxValue / beta, beta / minValue);
+      if (newRatio > minRatio) { sumValue -= nodeValue; break; }
+      minRatio = newRatio;
+    }
+
+    // Position and record the row orientation.
+    rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});
+    if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);
+    else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);
+    value -= sumValue, i0 = i1;
+  }
+
+  return rows;
+}
+
+var squarify = (function custom(ratio) {
+
+  function squarify(parent, x0, y0, x1, y1) {
+    squarifyRatio(ratio, parent, x0, y0, x1, y1);
+  }
+
+  squarify.ratio = function(x) {
+    return custom((x = +x) > 1 ? x : 1);
+  };
+
+  return squarify;
+})(phi);
+
+function index$3() {
+  var tile = squarify,
+      round = false,
+      dx = 1,
+      dy = 1,
+      paddingStack = [0],
+      paddingInner = constantZero,
+      paddingTop = constantZero,
+      paddingRight = constantZero,
+      paddingBottom = constantZero,
+      paddingLeft = constantZero;
+
+  function treemap(root) {
+    root.x0 =
+    root.y0 = 0;
+    root.x1 = dx;
+    root.y1 = dy;
+    root.eachBefore(positionNode);
+    paddingStack = [0];
+    if (round) root.eachBefore(roundNode);
+    return root;
+  }
+
+  function positionNode(node) {
+    var p = paddingStack[node.depth],
+        x0 = node.x0 + p,
+        y0 = node.y0 + p,
+        x1 = node.x1 - p,
+        y1 = node.y1 - p;
+    if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+    if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+    node.x0 = x0;
+    node.y0 = y0;
+    node.x1 = x1;
+    node.y1 = y1;
+    if (node.children) {
+      p = paddingStack[node.depth + 1] = paddingInner(node) / 2;
+      x0 += paddingLeft(node) - p;
+      y0 += paddingTop(node) - p;
+      x1 -= paddingRight(node) - p;
+      y1 -= paddingBottom(node) - p;
+      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+      tile(node, x0, y0, x1, y1);
+    }
+  }
+
+  treemap.round = function(x) {
+    return arguments.length ? (round = !!x, treemap) : round;
+  };
+
+  treemap.size = function(x) {
+    return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];
+  };
+
+  treemap.tile = function(x) {
+    return arguments.length ? (tile = required(x), treemap) : tile;
+  };
+
+  treemap.padding = function(x) {
+    return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();
+  };
+
+  treemap.paddingInner = function(x) {
+    return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$9(+x), treemap) : paddingInner;
+  };
+
+  treemap.paddingOuter = function(x) {
+    return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();
+  };
+
+  treemap.paddingTop = function(x) {
+    return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$9(+x), treemap) : paddingTop;
+  };
+
+  treemap.paddingRight = function(x) {
+    return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$9(+x), treemap) : paddingRight;
+  };
+
+  treemap.paddingBottom = function(x) {
+    return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$9(+x), treemap) : paddingBottom;
+  };
+
+  treemap.paddingLeft = function(x) {
+    return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$9(+x), treemap) : paddingLeft;
+  };
+
+  return treemap;
+}
+
+function binary(parent, x0, y0, x1, y1) {
+  var nodes = parent.children,
+      i, n = nodes.length,
+      sum, sums = new Array(n + 1);
+
+  for (sums[0] = sum = i = 0; i < n; ++i) {
+    sums[i + 1] = sum += nodes[i].value;
+  }
+
+  partition(0, n, parent.value, x0, y0, x1, y1);
+
+  function partition(i, j, value, x0, y0, x1, y1) {
+    if (i >= j - 1) {
+      var node = nodes[i];
+      node.x0 = x0, node.y0 = y0;
+      node.x1 = x1, node.y1 = y1;
+      return;
+    }
+
+    var valueOffset = sums[i],
+        valueTarget = (value / 2) + valueOffset,
+        k = i + 1,
+        hi = j - 1;
+
+    while (k < hi) {
+      var mid = k + hi >>> 1;
+      if (sums[mid] < valueTarget) k = mid + 1;
+      else hi = mid;
+    }
+
+    if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;
+
+    var valueLeft = sums[k] - valueOffset,
+        valueRight = value - valueLeft;
+
+    if ((x1 - x0) > (y1 - y0)) {
+      var xk = (x0 * valueRight + x1 * valueLeft) / value;
+      partition(i, k, valueLeft, x0, y0, xk, y1);
+      partition(k, j, valueRight, xk, y0, x1, y1);
+    } else {
+      var yk = (y0 * valueRight + y1 * valueLeft) / value;
+      partition(i, k, valueLeft, x0, y0, x1, yk);
+      partition(k, j, valueRight, x0, yk, x1, y1);
+    }
+  }
+}
+
+function sliceDice(parent, x0, y0, x1, y1) {
+  (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);
+}
+
+var resquarify = (function custom(ratio) {
+
+  function resquarify(parent, x0, y0, x1, y1) {
+    if ((rows = parent._squarify) && (rows.ratio === ratio)) {
+      var rows,
+          row,
+          nodes,
+          i,
+          j = -1,
+          n,
+          m = rows.length,
+          value = parent.value;
+
+      while (++j < m) {
+        row = rows[j], nodes = row.children;
+        for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;
+        if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);
+        else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);
+        value -= row.value;
+      }
+    } else {
+      parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);
+      rows.ratio = ratio;
+    }
+  }
+
+  resquarify.ratio = function(x) {
+    return custom((x = +x) > 1 ? x : 1);
+  };
+
+  return resquarify;
+})(phi);
+
+function area$2(polygon) {
+  var i = -1,
+      n = polygon.length,
+      a,
+      b = polygon[n - 1],
+      area = 0;
+
+  while (++i < n) {
+    a = b;
+    b = polygon[i];
+    area += a[1] * b[0] - a[0] * b[1];
+  }
+
+  return area / 2;
+}
+
+function centroid$1(polygon) {
+  var i = -1,
+      n = polygon.length,
+      x = 0,
+      y = 0,
+      a,
+      b = polygon[n - 1],
+      c,
+      k = 0;
+
+  while (++i < n) {
+    a = b;
+    b = polygon[i];
+    k += c = a[0] * b[1] - b[0] * a[1];
+    x += (a[0] + b[0]) * c;
+    y += (a[1] + b[1]) * c;
+  }
+
+  return k *= 3, [x / k, y / k];
+}
+
+// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
+// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
+// right, +y is up). Returns a positive value if ABC is counter-clockwise,
+// negative if clockwise, and zero if the points are collinear.
+function cross$1(a, b, c) {
+  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
+}
+
+function lexicographicOrder(a, b) {
+  return a[0] - b[0] || a[1] - b[1];
+}
+
+// Computes the upper convex hull per the monotone chain algorithm.
+// Assumes points.length >= 3, is sorted by x, unique in y.
+// Returns an array of indices into points in left-to-right order.
+function computeUpperHullIndexes(points) {
+  var n = points.length,
+      indexes = [0, 1],
+      size = 2;
+
+  for (var i = 2; i < n; ++i) {
+    while (size > 1 && cross$1(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;
+    indexes[size++] = i;
+  }
+
+  return indexes.slice(0, size); // remove popped points
+}
+
+function hull(points) {
+  if ((n = points.length) < 3) return null;
+
+  var i,
+      n,
+      sortedPoints = new Array(n),
+      flippedPoints = new Array(n);
+
+  for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];
+  sortedPoints.sort(lexicographicOrder);
+  for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
+
+  var upperIndexes = computeUpperHullIndexes(sortedPoints),
+      lowerIndexes = computeUpperHullIndexes(flippedPoints);
+
+  // Construct the hull polygon, removing possible duplicate endpoints.
+  var skipLeft = lowerIndexes[0] === upperIndexes[0],
+      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
+      hull = [];
+
+  // Add upper hull in right-to-l order.
+  // Then add lower hull in left-to-right order.
+  for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);
+  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+
+  return hull;
+}
+
+function contains$2(polygon, point) {
+  var n = polygon.length,
+      p = polygon[n - 1],
+      x = point[0], y = point[1],
+      x0 = p[0], y0 = p[1],
+      x1, y1,
+      inside = false;
+
+  for (var i = 0; i < n; ++i) {
+    p = polygon[i], x1 = p[0], y1 = p[1];
+    if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;
+    x0 = x1, y0 = y1;
+  }
+
+  return inside;
+}
+
+function length$2(polygon) {
+  var i = -1,
+      n = polygon.length,
+      b = polygon[n - 1],
+      xa,
+      ya,
+      xb = b[0],
+      yb = b[1],
+      perimeter = 0;
+
+  while (++i < n) {
+    xa = xb;
+    ya = yb;
+    b = polygon[i];
+    xb = b[0];
+    yb = b[1];
+    xa -= xb;
+    ya -= yb;
+    perimeter += Math.sqrt(xa * xa + ya * ya);
+  }
+
+  return perimeter;
+}
+
+function defaultSource$1() {
+  return Math.random();
+}
+
+var uniform = (function sourceRandomUniform(source) {
+  function randomUniform(min, max) {
+    min = min == null ? 0 : +min;
+    max = max == null ? 1 : +max;
+    if (arguments.length === 1) max = min, min = 0;
+    else max -= min;
+    return function() {
+      return source() * max + min;
+    };
+  }
+
+  randomUniform.source = sourceRandomUniform;
+
+  return randomUniform;
+})(defaultSource$1);
+
+var normal = (function sourceRandomNormal(source) {
+  function randomNormal(mu, sigma) {
+    var x, r;
+    mu = mu == null ? 0 : +mu;
+    sigma = sigma == null ? 1 : +sigma;
+    return function() {
+      var y;
+
+      // If available, use the second previously-generated uniform random.
+      if (x != null) y = x, x = null;
+
+      // Otherwise, generate a new x and y.
+      else do {
+        x = source() * 2 - 1;
+        y = source() * 2 - 1;
+        r = x * x + y * y;
+      } while (!r || r > 1);
+
+      return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);
+    };
+  }
+
+  randomNormal.source = sourceRandomNormal;
+
+  return randomNormal;
+})(defaultSource$1);
+
+var logNormal = (function sourceRandomLogNormal(source) {
+  function randomLogNormal() {
+    var randomNormal = normal.source(source).apply(this, arguments);
+    return function() {
+      return Math.exp(randomNormal());
+    };
+  }
+
+  randomLogNormal.source = sourceRandomLogNormal;
+
+  return randomLogNormal;
+})(defaultSource$1);
+
+var irwinHall = (function sourceRandomIrwinHall(source) {
+  function randomIrwinHall(n) {
+    return function() {
+      for (var sum = 0, i = 0; i < n; ++i) sum += source();
+      return sum;
+    };
+  }
+
+  randomIrwinHall.source = sourceRandomIrwinHall;
+
+  return randomIrwinHall;
+})(defaultSource$1);
+
+var bates = (function sourceRandomBates(source) {
+  function randomBates(n) {
+    var randomIrwinHall = irwinHall.source(source)(n);
+    return function() {
+      return randomIrwinHall() / n;
+    };
+  }
+
+  randomBates.source = sourceRandomBates;
+
+  return randomBates;
+})(defaultSource$1);
+
+var exponential$1 = (function sourceRandomExponential(source) {
+  function randomExponential(lambda) {
+    return function() {
+      return -Math.log(1 - source()) / lambda;
+    };
+  }
+
+  randomExponential.source = sourceRandomExponential;
+
+  return randomExponential;
+})(defaultSource$1);
+
+var array$3 = Array.prototype;
+
+var map$2 = array$3.map;
+var slice$5 = array$3.slice;
+
+var implicit = {name: "implicit"};
+
+function ordinal(range) {
+  var index = map$1(),
+      domain = [],
+      unknown = implicit;
+
+  range = range == null ? [] : slice$5.call(range);
+
+  function scale(d) {
+    var key = d + "", i = index.get(key);
+    if (!i) {
+      if (unknown !== implicit) return unknown;
+      index.set(key, i = domain.push(d));
+    }
+    return range[(i - 1) % range.length];
+  }
+
+  scale.domain = function(_) {
+    if (!arguments.length) return domain.slice();
+    domain = [], index = map$1();
+    var i = -1, n = _.length, d, key;
+    while (++i < n) if (!index.has(key = (d = _[i]) + "")) index.set(key, domain.push(d));
+    return scale;
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range = slice$5.call(_), scale) : range.slice();
+  };
+
+  scale.unknown = function(_) {
+    return arguments.length ? (unknown = _, scale) : unknown;
+  };
+
+  scale.copy = function() {
+    return ordinal()
+        .domain(domain)
+        .range(range)
+        .unknown(unknown);
+  };
+
+  return scale;
+}
+
+function band() {
+  var scale = ordinal().unknown(undefined),
+      domain = scale.domain,
+      ordinalRange = scale.range,
+      range$$1 = [0, 1],
+      step,
+      bandwidth,
+      round = false,
+      paddingInner = 0,
+      paddingOuter = 0,
+      align = 0.5;
+
+  delete scale.unknown;
+
+  function rescale() {
+    var n = domain().length,
+        reverse = range$$1[1] < range$$1[0],
+        start = range$$1[reverse - 0],
+        stop = range$$1[1 - reverse];
+    step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
+    if (round) step = Math.floor(step);
+    start += (stop - start - step * (n - paddingInner)) * align;
+    bandwidth = step * (1 - paddingInner);
+    if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);
+    var values = sequence(n).map(function(i) { return start + step * i; });
+    return ordinalRange(reverse ? values.reverse() : values);
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (domain(_), rescale()) : domain();
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();
+  };
+
+  scale.rangeRound = function(_) {
+    return range$$1 = [+_[0], +_[1]], round = true, rescale();
+  };
+
+  scale.bandwidth = function() {
+    return bandwidth;
+  };
+
+  scale.step = function() {
+    return step;
+  };
+
+  scale.round = function(_) {
+    return arguments.length ? (round = !!_, rescale()) : round;
+  };
+
+  scale.padding = function(_) {
+    return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
+  };
+
+  scale.paddingInner = function(_) {
+    return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
+  };
+
+  scale.paddingOuter = function(_) {
+    return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter;
+  };
+
+  scale.align = function(_) {
+    return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;
+  };
+
+  scale.copy = function() {
+    return band()
+        .domain(domain())
+        .range(range$$1)
+        .round(round)
+        .paddingInner(paddingInner)
+        .paddingOuter(paddingOuter)
+        .align(align);
+  };
+
+  return rescale();
+}
+
+function pointish(scale) {
+  var copy = scale.copy;
+
+  scale.padding = scale.paddingOuter;
+  delete scale.paddingInner;
+  delete scale.paddingOuter;
+
+  scale.copy = function() {
+    return pointish(copy());
+  };
+
+  return scale;
+}
+
+function point$1() {
+  return pointish(band().paddingInner(1));
+}
+
+function constant$10(x) {
+  return function() {
+    return x;
+  };
+}
+
+function number$2(x) {
+  return +x;
+}
+
+var unit = [0, 1];
+
+function deinterpolateLinear(a, b) {
+  return (b -= (a = +a))
+      ? function(x) { return (x - a) / b; }
+      : constant$10(b);
+}
+
+function deinterpolateClamp(deinterpolate) {
+  return function(a, b) {
+    var d = deinterpolate(a = +a, b = +b);
+    return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); };
+  };
+}
+
+function reinterpolateClamp(reinterpolate$$1) {
+  return function(a, b) {
+    var r = reinterpolate$$1(a = +a, b = +b);
+    return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); };
+  };
+}
+
+function bimap(domain, range, deinterpolate, reinterpolate$$1) {
+  var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
+  if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate$$1(r1, r0);
+  else d0 = deinterpolate(d0, d1), r0 = reinterpolate$$1(r0, r1);
+  return function(x) { return r0(d0(x)); };
+}
+
+function polymap(domain, range, deinterpolate, reinterpolate$$1) {
+  var j = Math.min(domain.length, range.length) - 1,
+      d = new Array(j),
+      r = new Array(j),
+      i = -1;
+
+  // Reverse descending domains.
+  if (domain[j] < domain[0]) {
+    domain = domain.slice().reverse();
+    range = range.slice().reverse();
+  }
+
+  while (++i < j) {
+    d[i] = deinterpolate(domain[i], domain[i + 1]);
+    r[i] = reinterpolate$$1(range[i], range[i + 1]);
+  }
+
+  return function(x) {
+    var i = bisectRight(domain, x, 1, j) - 1;
+    return r[i](d[i](x));
+  };
+}
+
+function copy(source, target) {
+  return target
+      .domain(source.domain())
+      .range(source.range())
+      .interpolate(source.interpolate())
+      .clamp(source.clamp());
+}
+
+// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
+// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b].
+function continuous(deinterpolate, reinterpolate$$1) {
+  var domain = unit,
+      range = unit,
+      interpolate$$1 = interpolateValue,
+      clamp = false,
+      piecewise$$1,
+      output,
+      input;
+
+  function rescale() {
+    piecewise$$1 = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
+    output = input = null;
+    return scale;
+  }
+
+  function scale(x) {
+    return (output || (output = piecewise$$1(domain, range, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);
+  }
+
+  scale.invert = function(y) {
+    return (input || (input = piecewise$$1(range, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate$$1) : reinterpolate$$1)))(+y);
+  };
+
+  scale.domain = function(_) {
+    return arguments.length ? (domain = map$2.call(_, number$2), rescale()) : domain.slice();
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range = slice$5.call(_), rescale()) : range.slice();
+  };
+
+  scale.rangeRound = function(_) {
+    return range = slice$5.call(_), interpolate$$1 = interpolateRound, rescale();
+  };
+
+  scale.clamp = function(_) {
+    return arguments.length ? (clamp = !!_, rescale()) : clamp;
+  };
+
+  scale.interpolate = function(_) {
+    return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;
+  };
+
+  return rescale();
+}
+
+function tickFormat(domain, count, specifier) {
+  var start = domain[0],
+      stop = domain[domain.length - 1],
+      step = tickStep(start, stop, count == null ? 10 : count),
+      precision;
+  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
+  switch (specifier.type) {
+    case "s": {
+      var value = Math.max(Math.abs(start), Math.abs(stop));
+      if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
+      return exports.formatPrefix(specifier, value);
+    }
+    case "":
+    case "e":
+    case "g":
+    case "p":
+    case "r": {
+      if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
+      break;
+    }
+    case "f":
+    case "%": {
+      if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+      break;
+    }
+  }
+  return exports.format(specifier);
+}
+
+function linearish(scale) {
+  var domain = scale.domain;
+
+  scale.ticks = function(count) {
+    var d = domain();
+    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+  };
+
+  scale.tickFormat = function(count, specifier) {
+    return tickFormat(domain(), count, specifier);
+  };
+
+  scale.nice = function(count) {
+    if (count == null) count = 10;
+
+    var d = domain(),
+        i0 = 0,
+        i1 = d.length - 1,
+        start = d[i0],
+        stop = d[i1],
+        step;
+
+    if (stop < start) {
+      step = start, start = stop, stop = step;
+      step = i0, i0 = i1, i1 = step;
+    }
+
+    step = tickIncrement(start, stop, count);
+
+    if (step > 0) {
+      start = Math.floor(start / step) * step;
+      stop = Math.ceil(stop / step) * step;
+      step = tickIncrement(start, stop, count);
+    } else if (step < 0) {
+      start = Math.ceil(start * step) / step;
+      stop = Math.floor(stop * step) / step;
+      step = tickIncrement(start, stop, count);
+    }
+
+    if (step > 0) {
+      d[i0] = Math.floor(start / step) * step;
+      d[i1] = Math.ceil(stop / step) * step;
+      domain(d);
+    } else if (step < 0) {
+      d[i0] = Math.ceil(start * step) / step;
+      d[i1] = Math.floor(stop * step) / step;
+      domain(d);
+    }
+
+    return scale;
+  };
+
+  return scale;
+}
+
+function linear$2() {
+  var scale = continuous(deinterpolateLinear, reinterpolate);
+
+  scale.copy = function() {
+    return copy(scale, linear$2());
+  };
+
+  return linearish(scale);
+}
+
+function identity$6() {
+  var domain = [0, 1];
+
+  function scale(x) {
+    return +x;
+  }
+
+  scale.invert = scale;
+
+  scale.domain = scale.range = function(_) {
+    return arguments.length ? (domain = map$2.call(_, number$2), scale) : domain.slice();
+  };
+
+  scale.copy = function() {
+    return identity$6().domain(domain);
+  };
+
+  return linearish(scale);
+}
+
+function nice(domain, interval) {
+  domain = domain.slice();
+
+  var i0 = 0,
+      i1 = domain.length - 1,
+      x0 = domain[i0],
+      x1 = domain[i1],
+      t;
+
+  if (x1 < x0) {
+    t = i0, i0 = i1, i1 = t;
+    t = x0, x0 = x1, x1 = t;
+  }
+
+  domain[i0] = interval.floor(x0);
+  domain[i1] = interval.ceil(x1);
+  return domain;
+}
+
+function deinterpolate(a, b) {
+  return (b = Math.log(b / a))
+      ? function(x) { return Math.log(x / a) / b; }
+      : constant$10(b);
+}
+
+function reinterpolate$1(a, b) {
+  return a < 0
+      ? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); }
+      : function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); };
+}
+
+function pow10(x) {
+  return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x;
+}
+
+function powp(base) {
+  return base === 10 ? pow10
+      : base === Math.E ? Math.exp
+      : function(x) { return Math.pow(base, x); };
+}
+
+function logp(base) {
+  return base === Math.E ? Math.log
+      : base === 10 && Math.log10
+      || base === 2 && Math.log2
+      || (base = Math.log(base), function(x) { return Math.log(x) / base; });
+}
+
+function reflect(f) {
+  return function(x) {
+    return -f(-x);
+  };
+}
+
+function log$1() {
+  var scale = continuous(deinterpolate, reinterpolate$1).domain([1, 10]),
+      domain = scale.domain,
+      base = 10,
+      logs = logp(10),
+      pows = powp(10);
+
+  function rescale() {
+    logs = logp(base), pows = powp(base);
+    if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows);
+    return scale;
+  }
+
+  scale.base = function(_) {
+    return arguments.length ? (base = +_, rescale()) : base;
+  };
+
+  scale.domain = function(_) {
+    return arguments.length ? (domain(_), rescale()) : domain();
+  };
+
+  scale.ticks = function(count) {
+    var d = domain(),
+        u = d[0],
+        v = d[d.length - 1],
+        r;
+
+    if (r = v < u) i = u, u = v, v = i;
+
+    var i = logs(u),
+        j = logs(v),
+        p,
+        k,
+        t,
+        n = count == null ? 10 : +count,
+        z = [];
+
+    if (!(base % 1) && j - i < n) {
+      i = Math.round(i) - 1, j = Math.round(j) + 1;
+      if (u > 0) for (; i < j; ++i) {
+        for (k = 1, p = pows(i); k < base; ++k) {
+          t = p * k;
+          if (t < u) continue;
+          if (t > v) break;
+          z.push(t);
+        }
+      } else for (; i < j; ++i) {
+        for (k = base - 1, p = pows(i); k >= 1; --k) {
+          t = p * k;
+          if (t < u) continue;
+          if (t > v) break;
+          z.push(t);
+        }
+      }
+    } else {
+      z = ticks(i, j, Math.min(j - i, n)).map(pows);
+    }
+
+    return r ? z.reverse() : z;
+  };
+
+  scale.tickFormat = function(count, specifier) {
+    if (specifier == null) specifier = base === 10 ? ".0e" : ",";
+    if (typeof specifier !== "function") specifier = exports.format(specifier);
+    if (count === Infinity) return specifier;
+    if (count == null) count = 10;
+    var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?
+    return function(d) {
+      var i = d / pows(Math.round(logs(d)));
+      if (i * base < base - 0.5) i *= base;
+      return i <= k ? specifier(d) : "";
+    };
+  };
+
+  scale.nice = function() {
+    return domain(nice(domain(), {
+      floor: function(x) { return pows(Math.floor(logs(x))); },
+      ceil: function(x) { return pows(Math.ceil(logs(x))); }
+    }));
+  };
+
+  scale.copy = function() {
+    return copy(scale, log$1().base(base));
+  };
+
+  return scale;
+}
+
+function raise$1(x, exponent) {
+  return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
+}
+
+function pow$1() {
+  var exponent = 1,
+      scale = continuous(deinterpolate, reinterpolate),
+      domain = scale.domain;
+
+  function deinterpolate(a, b) {
+    return (b = raise$1(b, exponent) - (a = raise$1(a, exponent)))
+        ? function(x) { return (raise$1(x, exponent) - a) / b; }
+        : constant$10(b);
+  }
+
+  function reinterpolate(a, b) {
+    b = raise$1(b, exponent) - (a = raise$1(a, exponent));
+    return function(t) { return raise$1(a + b * t, 1 / exponent); };
+  }
+
+  scale.exponent = function(_) {
+    return arguments.length ? (exponent = +_, domain(domain())) : exponent;
+  };
+
+  scale.copy = function() {
+    return copy(scale, pow$1().exponent(exponent));
+  };
+
+  return linearish(scale);
+}
+
+function sqrt$1() {
+  return pow$1().exponent(0.5);
+}
+
+function quantile$$1() {
+  var domain = [],
+      range = [],
+      thresholds = [];
+
+  function rescale() {
+    var i = 0, n = Math.max(1, range.length);
+    thresholds = new Array(n - 1);
+    while (++i < n) thresholds[i - 1] = threshold(domain, i / n);
+    return scale;
+  }
+
+  function scale(x) {
+    if (!isNaN(x = +x)) return range[bisectRight(thresholds, x)];
+  }
+
+  scale.invertExtent = function(y) {
+    var i = range.indexOf(y);
+    return i < 0 ? [NaN, NaN] : [
+      i > 0 ? thresholds[i - 1] : domain[0],
+      i < thresholds.length ? thresholds[i] : domain[domain.length - 1]
+    ];
+  };
+
+  scale.domain = function(_) {
+    if (!arguments.length) return domain.slice();
+    domain = [];
+    for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);
+    domain.sort(ascending);
+    return rescale();
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range = slice$5.call(_), rescale()) : range.slice();
+  };
+
+  scale.quantiles = function() {
+    return thresholds.slice();
+  };
+
+  scale.copy = function() {
+    return quantile$$1()
+        .domain(domain)
+        .range(range);
+  };
+
+  return scale;
+}
+
+function quantize$1() {
+  var x0 = 0,
+      x1 = 1,
+      n = 1,
+      domain = [0.5],
+      range = [0, 1];
+
+  function scale(x) {
+    if (x <= x) return range[bisectRight(domain, x, 0, n)];
+  }
+
+  function rescale() {
+    var i = -1;
+    domain = new Array(n);
+    while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
+    return scale;
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (n = (range = slice$5.call(_)).length - 1, rescale()) : range.slice();
+  };
+
+  scale.invertExtent = function(y) {
+    var i = range.indexOf(y);
+    return i < 0 ? [NaN, NaN]
+        : i < 1 ? [x0, domain[0]]
+        : i >= n ? [domain[n - 1], x1]
+        : [domain[i - 1], domain[i]];
+  };
+
+  scale.copy = function() {
+    return quantize$1()
+        .domain([x0, x1])
+        .range(range);
+  };
+
+  return linearish(scale);
+}
+
+function threshold$1() {
+  var domain = [0.5],
+      range = [0, 1],
+      n = 1;
+
+  function scale(x) {
+    if (x <= x) return range[bisectRight(domain, x, 0, n)];
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (domain = slice$5.call(_), n = Math.min(domain.length, range.length - 1), scale) : domain.slice();
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range = slice$5.call(_), n = Math.min(domain.length, range.length - 1), scale) : range.slice();
+  };
+
+  scale.invertExtent = function(y) {
+    var i = range.indexOf(y);
+    return [domain[i - 1], domain[i]];
+  };
+
+  scale.copy = function() {
+    return threshold$1()
+        .domain(domain)
+        .range(range);
+  };
+
+  return scale;
+}
+
+var t0$1 = new Date,
+    t1$1 = new Date;
+
+function newInterval(floori, offseti, count, field) {
+
+  function interval(date) {
+    return floori(date = new Date(+date)), date;
+  }
+
+  interval.floor = interval;
+
+  interval.ceil = function(date) {
+    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
+  };
+
+  interval.round = function(date) {
+    var d0 = interval(date),
+        d1 = interval.ceil(date);
+    return date - d0 < d1 - date ? d0 : d1;
+  };
+
+  interval.offset = function(date, step) {
+    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
+  };
+
+  interval.range = function(start, stop, step) {
+    var range = [], previous;
+    start = interval.ceil(start);
+    step = step == null ? 1 : Math.floor(step);
+    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
+    do range.push(previous = new Date(+start)), offseti(start, step), floori(start);
+    while (previous < start && start < stop);
+    return range;
+  };
+
+  interval.filter = function(test) {
+    return newInterval(function(date) {
+      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
+    }, function(date, step) {
+      if (date >= date) {
+        if (step < 0) while (++step <= 0) {
+          while (offseti(date, -1), !test(date)) {} // eslint-disable-line no-empty
+        } else while (--step >= 0) {
+          while (offseti(date, +1), !test(date)) {} // eslint-disable-line no-empty
+        }
+      }
+    });
+  };
+
+  if (count) {
+    interval.count = function(start, end) {
+      t0$1.setTime(+start), t1$1.setTime(+end);
+      floori(t0$1), floori(t1$1);
+      return Math.floor(count(t0$1, t1$1));
+    };
+
+    interval.every = function(step) {
+      step = Math.floor(step);
+      return !isFinite(step) || !(step > 0) ? null
+          : !(step > 1) ? interval
+          : interval.filter(field
+              ? function(d) { return field(d) % step === 0; }
+              : function(d) { return interval.count(0, d) % step === 0; });
+    };
+  }
+
+  return interval;
+}
+
+var millisecond = newInterval(function() {
+  // noop
+}, function(date, step) {
+  date.setTime(+date + step);
+}, function(start, end) {
+  return end - start;
+});
+
+// An optimized implementation for this simple case.
+millisecond.every = function(k) {
+  k = Math.floor(k);
+  if (!isFinite(k) || !(k > 0)) return null;
+  if (!(k > 1)) return millisecond;
+  return newInterval(function(date) {
+    date.setTime(Math.floor(date / k) * k);
+  }, function(date, step) {
+    date.setTime(+date + step * k);
+  }, function(start, end) {
+    return (end - start) / k;
+  });
+};
+var milliseconds = millisecond.range;
+
+var durationSecond = 1e3;
+var durationMinute = 6e4;
+var durationHour = 36e5;
+var durationDay = 864e5;
+var durationWeek = 6048e5;
+
+var second = newInterval(function(date) {
+  date.setTime(Math.floor(date / durationSecond) * durationSecond);
+}, function(date, step) {
+  date.setTime(+date + step * durationSecond);
+}, function(start, end) {
+  return (end - start) / durationSecond;
+}, function(date) {
+  return date.getUTCSeconds();
+});
+var seconds = second.range;
+
+var minute = newInterval(function(date) {
+  date.setTime(Math.floor(date / durationMinute) * durationMinute);
+}, function(date, step) {
+  date.setTime(+date + step * durationMinute);
+}, function(start, end) {
+  return (end - start) / durationMinute;
+}, function(date) {
+  return date.getMinutes();
+});
+var minutes = minute.range;
+
+var hour = newInterval(function(date) {
+  var offset = date.getTimezoneOffset() * durationMinute % durationHour;
+  if (offset < 0) offset += durationHour;
+  date.setTime(Math.floor((+date - offset) / durationHour) * durationHour + offset);
+}, function(date, step) {
+  date.setTime(+date + step * durationHour);
+}, function(start, end) {
+  return (end - start) / durationHour;
+}, function(date) {
+  return date.getHours();
+});
+var hours = hour.range;
+
+var day = newInterval(function(date) {
+  date.setHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setDate(date.getDate() + step);
+}, function(start, end) {
+  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay;
+}, function(date) {
+  return date.getDate() - 1;
+});
+var days = day.range;
+
+function weekday(i) {
+  return newInterval(function(date) {
+    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
+    date.setHours(0, 0, 0, 0);
+  }, function(date, step) {
+    date.setDate(date.getDate() + step * 7);
+  }, function(start, end) {
+    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
+  });
+}
+
+var sunday = weekday(0);
+var monday = weekday(1);
+var tuesday = weekday(2);
+var wednesday = weekday(3);
+var thursday = weekday(4);
+var friday = weekday(5);
+var saturday = weekday(6);
+
+var sundays = sunday.range;
+var mondays = monday.range;
+var tuesdays = tuesday.range;
+var wednesdays = wednesday.range;
+var thursdays = thursday.range;
+var fridays = friday.range;
+var saturdays = saturday.range;
+
+var month = newInterval(function(date) {
+  date.setDate(1);
+  date.setHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setMonth(date.getMonth() + step);
+}, function(start, end) {
+  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
+}, function(date) {
+  return date.getMonth();
+});
+var months = month.range;
+
+var year = newInterval(function(date) {
+  date.setMonth(0, 1);
+  date.setHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setFullYear(date.getFullYear() + step);
+}, function(start, end) {
+  return end.getFullYear() - start.getFullYear();
+}, function(date) {
+  return date.getFullYear();
+});
+
+// An optimized implementation for this simple case.
+year.every = function(k) {
+  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
+    date.setFullYear(Math.floor(date.getFullYear() / k) * k);
+    date.setMonth(0, 1);
+    date.setHours(0, 0, 0, 0);
+  }, function(date, step) {
+    date.setFullYear(date.getFullYear() + step * k);
+  });
+};
+var years = year.range;
+
+var utcMinute = newInterval(function(date) {
+  date.setUTCSeconds(0, 0);
+}, function(date, step) {
+  date.setTime(+date + step * durationMinute);
+}, function(start, end) {
+  return (end - start) / durationMinute;
+}, function(date) {
+  return date.getUTCMinutes();
+});
+var utcMinutes = utcMinute.range;
+
+var utcHour = newInterval(function(date) {
+  date.setUTCMinutes(0, 0, 0);
+}, function(date, step) {
+  date.setTime(+date + step * durationHour);
+}, function(start, end) {
+  return (end - start) / durationHour;
+}, function(date) {
+  return date.getUTCHours();
+});
+var utcHours = utcHour.range;
+
+var utcDay = newInterval(function(date) {
+  date.setUTCHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setUTCDate(date.getUTCDate() + step);
+}, function(start, end) {
+  return (end - start) / durationDay;
+}, function(date) {
+  return date.getUTCDate() - 1;
+});
+var utcDays = utcDay.range;
+
+function utcWeekday(i) {
+  return newInterval(function(date) {
+    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
+    date.setUTCHours(0, 0, 0, 0);
+  }, function(date, step) {
+    date.setUTCDate(date.getUTCDate() + step * 7);
+  }, function(start, end) {
+    return (end - start) / durationWeek;
+  });
+}
+
+var utcSunday = utcWeekday(0);
+var utcMonday = utcWeekday(1);
+var utcTuesday = utcWeekday(2);
+var utcWednesday = utcWeekday(3);
+var utcThursday = utcWeekday(4);
+var utcFriday = utcWeekday(5);
+var utcSaturday = utcWeekday(6);
+
+var utcSundays = utcSunday.range;
+var utcMondays = utcMonday.range;
+var utcTuesdays = utcTuesday.range;
+var utcWednesdays = utcWednesday.range;
+var utcThursdays = utcThursday.range;
+var utcFridays = utcFriday.range;
+var utcSaturdays = utcSaturday.range;
+
+var utcMonth = newInterval(function(date) {
+  date.setUTCDate(1);
+  date.setUTCHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setUTCMonth(date.getUTCMonth() + step);
+}, function(start, end) {
+  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
+}, function(date) {
+  return date.getUTCMonth();
+});
+var utcMonths = utcMonth.range;
+
+var utcYear = newInterval(function(date) {
+  date.setUTCMonth(0, 1);
+  date.setUTCHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setUTCFullYear(date.getUTCFullYear() + step);
+}, function(start, end) {
+  return end.getUTCFullYear() - start.getUTCFullYear();
+}, function(date) {
+  return date.getUTCFullYear();
+});
+
+// An optimized implementation for this simple case.
+utcYear.every = function(k) {
+  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
+    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
+    date.setUTCMonth(0, 1);
+    date.setUTCHours(0, 0, 0, 0);
+  }, function(date, step) {
+    date.setUTCFullYear(date.getUTCFullYear() + step * k);
+  });
+};
+var utcYears = utcYear.range;
+
+function localDate(d) {
+  if (0 <= d.y && d.y < 100) {
+    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
+    date.setFullYear(d.y);
+    return date;
+  }
+  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
+}
+
+function utcDate(d) {
+  if (0 <= d.y && d.y < 100) {
+    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
+    date.setUTCFullYear(d.y);
+    return date;
+  }
+  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
+}
+
+function newYear(y) {
+  return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};
+}
+
+function formatLocale$1(locale) {
+  var locale_dateTime = locale.dateTime,
+      locale_date = locale.date,
+      locale_time = locale.time,
+      locale_periods = locale.periods,
+      locale_weekdays = locale.days,
+      locale_shortWeekdays = locale.shortDays,
+      locale_months = locale.months,
+      locale_shortMonths = locale.shortMonths;
+
+  var periodRe = formatRe(locale_periods),
+      periodLookup = formatLookup(locale_periods),
+      weekdayRe = formatRe(locale_weekdays),
+      weekdayLookup = formatLookup(locale_weekdays),
+      shortWeekdayRe = formatRe(locale_shortWeekdays),
+      shortWeekdayLookup = formatLookup(locale_shortWeekdays),
+      monthRe = formatRe(locale_months),
+      monthLookup = formatLookup(locale_months),
+      shortMonthRe = formatRe(locale_shortMonths),
+      shortMonthLookup = formatLookup(locale_shortMonths);
+
+  var formats = {
+    "a": formatShortWeekday,
+    "A": formatWeekday,
+    "b": formatShortMonth,
+    "B": formatMonth,
+    "c": null,
+    "d": formatDayOfMonth,
+    "e": formatDayOfMonth,
+    "f": formatMicroseconds,
+    "H": formatHour24,
+    "I": formatHour12,
+    "j": formatDayOfYear,
+    "L": formatMilliseconds,
+    "m": formatMonthNumber,
+    "M": formatMinutes,
+    "p": formatPeriod,
+    "Q": formatUnixTimestamp,
+    "s": formatUnixTimestampSeconds,
+    "S": formatSeconds,
+    "u": formatWeekdayNumberMonday,
+    "U": formatWeekNumberSunday,
+    "V": formatWeekNumberISO,
+    "w": formatWeekdayNumberSunday,
+    "W": formatWeekNumberMonday,
+    "x": null,
+    "X": null,
+    "y": formatYear,
+    "Y": formatFullYear,
+    "Z": formatZone,
+    "%": formatLiteralPercent
+  };
+
+  var utcFormats = {
+    "a": formatUTCShortWeekday,
+    "A": formatUTCWeekday,
+    "b": formatUTCShortMonth,
+    "B": formatUTCMonth,
+    "c": null,
+    "d": formatUTCDayOfMonth,
+    "e": formatUTCDayOfMonth,
+    "f": formatUTCMicroseconds,
+    "H": formatUTCHour24,
+    "I": formatUTCHour12,
+    "j": formatUTCDayOfYear,
+    "L": formatUTCMilliseconds,
+    "m": formatUTCMonthNumber,
+    "M": formatUTCMinutes,
+    "p": formatUTCPeriod,
+    "Q": formatUnixTimestamp,
+    "s": formatUnixTimestampSeconds,
+    "S": formatUTCSeconds,
+    "u": formatUTCWeekdayNumberMonday,
+    "U": formatUTCWeekNumberSunday,
+    "V": formatUTCWeekNumberISO,
+    "w": formatUTCWeekdayNumberSunday,
+    "W": formatUTCWeekNumberMonday,
+    "x": null,
+    "X": null,
+    "y": formatUTCYear,
+    "Y": formatUTCFullYear,
+    "Z": formatUTCZone,
+    "%": formatLiteralPercent
+  };
+
+  var parses = {
+    "a": parseShortWeekday,
+    "A": parseWeekday,
+    "b": parseShortMonth,
+    "B": parseMonth,
+    "c": parseLocaleDateTime,
+    "d": parseDayOfMonth,
+    "e": parseDayOfMonth,
+    "f": parseMicroseconds,
+    "H": parseHour24,
+    "I": parseHour24,
+    "j": parseDayOfYear,
+    "L": parseMilliseconds,
+    "m": parseMonthNumber,
+    "M": parseMinutes,
+    "p": parsePeriod,
+    "Q": parseUnixTimestamp,
+    "s": parseUnixTimestampSeconds,
+    "S": parseSeconds,
+    "u": parseWeekdayNumberMonday,
+    "U": parseWeekNumberSunday,
+    "V": parseWeekNumberISO,
+    "w": parseWeekdayNumberSunday,
+    "W": parseWeekNumberMonday,
+    "x": parseLocaleDate,
+    "X": parseLocaleTime,
+    "y": parseYear,
+    "Y": parseFullYear,
+    "Z": parseZone,
+    "%": parseLiteralPercent
+  };
+
+  // These recursive directive definitions must be deferred.
+  formats.x = newFormat(locale_date, formats);
+  formats.X = newFormat(locale_time, formats);
+  formats.c = newFormat(locale_dateTime, formats);
+  utcFormats.x = newFormat(locale_date, utcFormats);
+  utcFormats.X = newFormat(locale_time, utcFormats);
+  utcFormats.c = newFormat(locale_dateTime, utcFormats);
+
+  function newFormat(specifier, formats) {
+    return function(date) {
+      var string = [],
+          i = -1,
+          j = 0,
+          n = specifier.length,
+          c,
+          pad,
+          format;
+
+      if (!(date instanceof Date)) date = new Date(+date);
+
+      while (++i < n) {
+        if (specifier.charCodeAt(i) === 37) {
+          string.push(specifier.slice(j, i));
+          if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);
+          else pad = c === "e" ? " " : "0";
+          if (format = formats[c]) c = format(date, pad);
+          string.push(c);
+          j = i + 1;
+        }
+      }
+
+      string.push(specifier.slice(j, i));
+      return string.join("");
+    };
+  }
+
+  function newParse(specifier, newDate) {
+    return function(string) {
+      var d = newYear(1900),
+          i = parseSpecifier(d, specifier, string += "", 0),
+          week, day$$1;
+      if (i != string.length) return null;
+
+      // If a UNIX timestamp is specified, return it.
+      if ("Q" in d) return new Date(d.Q);
+
+      // The am-pm flag is 0 for AM, and 1 for PM.
+      if ("p" in d) d.H = d.H % 12 + d.p * 12;
+
+      // Convert day-of-week and week-of-year to day-of-year.
+      if ("V" in d) {
+        if (d.V < 1 || d.V > 53) return null;
+        if (!("w" in d)) d.w = 1;
+        if ("Z" in d) {
+          week = utcDate(newYear(d.y)), day$$1 = week.getUTCDay();
+          week = day$$1 > 4 || day$$1 === 0 ? utcMonday.ceil(week) : utcMonday(week);
+          week = utcDay.offset(week, (d.V - 1) * 7);
+          d.y = week.getUTCFullYear();
+          d.m = week.getUTCMonth();
+          d.d = week.getUTCDate() + (d.w + 6) % 7;
+        } else {
+          week = newDate(newYear(d.y)), day$$1 = week.getDay();
+          week = day$$1 > 4 || day$$1 === 0 ? monday.ceil(week) : monday(week);
+          week = day.offset(week, (d.V - 1) * 7);
+          d.y = week.getFullYear();
+          d.m = week.getMonth();
+          d.d = week.getDate() + (d.w + 6) % 7;
+        }
+      } else if ("W" in d || "U" in d) {
+        if (!("w" in d)) d.w = "u" in d ? d.u % 7 : "W" in d ? 1 : 0;
+        day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
+        d.m = 0;
+        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;
+      }
+
+      // If a time zone is specified, all fields are interpreted as UTC and then
+      // offset according to the specified time zone.
+      if ("Z" in d) {
+        d.H += d.Z / 100 | 0;
+        d.M += d.Z % 100;
+        return utcDate(d);
+      }
+
+      // Otherwise, all fields are in local time.
+      return newDate(d);
+    };
+  }
+
+  function parseSpecifier(d, specifier, string, j) {
+    var i = 0,
+        n = specifier.length,
+        m = string.length,
+        c,
+        parse;
+
+    while (i < n) {
+      if (j >= m) return -1;
+      c = specifier.charCodeAt(i++);
+      if (c === 37) {
+        c = specifier.charAt(i++);
+        parse = parses[c in pads ? specifier.charAt(i++) : c];
+        if (!parse || ((j = parse(d, string, j)) < 0)) return -1;
+      } else if (c != string.charCodeAt(j++)) {
+        return -1;
+      }
+    }
+
+    return j;
+  }
+
+  function parsePeriod(d, string, i) {
+    var n = periodRe.exec(string.slice(i));
+    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseShortWeekday(d, string, i) {
+    var n = shortWeekdayRe.exec(string.slice(i));
+    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseWeekday(d, string, i) {
+    var n = weekdayRe.exec(string.slice(i));
+    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseShortMonth(d, string, i) {
+    var n = shortMonthRe.exec(string.slice(i));
+    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseMonth(d, string, i) {
+    var n = monthRe.exec(string.slice(i));
+    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseLocaleDateTime(d, string, i) {
+    return parseSpecifier(d, locale_dateTime, string, i);
+  }
+
+  function parseLocaleDate(d, string, i) {
+    return parseSpecifier(d, locale_date, string, i);
+  }
+
+  function parseLocaleTime(d, string, i) {
+    return parseSpecifier(d, locale_time, string, i);
+  }
+
+  function formatShortWeekday(d) {
+    return locale_shortWeekdays[d.getDay()];
+  }
+
+  function formatWeekday(d) {
+    return locale_weekdays[d.getDay()];
+  }
+
+  function formatShortMonth(d) {
+    return locale_shortMonths[d.getMonth()];
+  }
+
+  function formatMonth(d) {
+    return locale_months[d.getMonth()];
+  }
+
+  function formatPeriod(d) {
+    return locale_periods[+(d.getHours() >= 12)];
+  }
+
+  function formatUTCShortWeekday(d) {
+    return locale_shortWeekdays[d.getUTCDay()];
+  }
+
+  function formatUTCWeekday(d) {
+    return locale_weekdays[d.getUTCDay()];
+  }
+
+  function formatUTCShortMonth(d) {
+    return locale_shortMonths[d.getUTCMonth()];
+  }
+
+  function formatUTCMonth(d) {
+    return locale_months[d.getUTCMonth()];
+  }
+
+  function formatUTCPeriod(d) {
+    return locale_periods[+(d.getUTCHours() >= 12)];
+  }
+
+  return {
+    format: function(specifier) {
+      var f = newFormat(specifier += "", formats);
+      f.toString = function() { return specifier; };
+      return f;
+    },
+    parse: function(specifier) {
+      var p = newParse(specifier += "", localDate);
+      p.toString = function() { return specifier; };
+      return p;
+    },
+    utcFormat: function(specifier) {
+      var f = newFormat(specifier += "", utcFormats);
+      f.toString = function() { return specifier; };
+      return f;
+    },
+    utcParse: function(specifier) {
+      var p = newParse(specifier, utcDate);
+      p.toString = function() { return specifier; };
+      return p;
+    }
+  };
+}
+
+var pads = {"-": "", "_": " ", "0": "0"},
+    numberRe = /^\s*\d+/, // note: ignores next directive
+    percentRe = /^%/,
+    requoteRe = /[\\^$*+?|[\]().{}]/g;
+
+function pad(value, fill, width) {
+  var sign = value < 0 ? "-" : "",
+      string = (sign ? -value : value) + "",
+      length = string.length;
+  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
+}
+
+function requote(s) {
+  return s.replace(requoteRe, "\\$&");
+}
+
+function formatRe(names) {
+  return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");
+}
+
+function formatLookup(names) {
+  var map = {}, i = -1, n = names.length;
+  while (++i < n) map[names[i].toLowerCase()] = i;
+  return map;
+}
+
+function parseWeekdayNumberSunday(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 1));
+  return n ? (d.w = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekdayNumberMonday(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 1));
+  return n ? (d.u = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekNumberSunday(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.U = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekNumberISO(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.V = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekNumberMonday(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.W = +n[0], i + n[0].length) : -1;
+}
+
+function parseFullYear(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 4));
+  return n ? (d.y = +n[0], i + n[0].length) : -1;
+}
+
+function parseYear(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
+}
+
+function parseZone(d, string, i) {
+  var n = /^(Z)|([+-]\d\d)(?::?(\d\d))?/.exec(string.slice(i, i + 6));
+  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
+}
+
+function parseMonthNumber(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
+}
+
+function parseDayOfMonth(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.d = +n[0], i + n[0].length) : -1;
+}
+
+function parseDayOfYear(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 3));
+  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
+}
+
+function parseHour24(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.H = +n[0], i + n[0].length) : -1;
+}
+
+function parseMinutes(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.M = +n[0], i + n[0].length) : -1;
+}
+
+function parseSeconds(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.S = +n[0], i + n[0].length) : -1;
+}
+
+function parseMilliseconds(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 3));
+  return n ? (d.L = +n[0], i + n[0].length) : -1;
+}
+
+function parseMicroseconds(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 6));
+  return n ? (d.L = Math.floor(n[0] / 1000), i + n[0].length) : -1;
+}
+
+function parseLiteralPercent(d, string, i) {
+  var n = percentRe.exec(string.slice(i, i + 1));
+  return n ? i + n[0].length : -1;
+}
+
+function parseUnixTimestamp(d, string, i) {
+  var n = numberRe.exec(string.slice(i));
+  return n ? (d.Q = +n[0], i + n[0].length) : -1;
+}
+
+function parseUnixTimestampSeconds(d, string, i) {
+  var n = numberRe.exec(string.slice(i));
+  return n ? (d.Q = (+n[0]) * 1000, i + n[0].length) : -1;
+}
+
+function formatDayOfMonth(d, p) {
+  return pad(d.getDate(), p, 2);
+}
+
+function formatHour24(d, p) {
+  return pad(d.getHours(), p, 2);
+}
+
+function formatHour12(d, p) {
+  return pad(d.getHours() % 12 || 12, p, 2);
+}
+
+function formatDayOfYear(d, p) {
+  return pad(1 + day.count(year(d), d), p, 3);
+}
+
+function formatMilliseconds(d, p) {
+  return pad(d.getMilliseconds(), p, 3);
+}
+
+function formatMicroseconds(d, p) {
+  return formatMilliseconds(d, p) + "000";
+}
+
+function formatMonthNumber(d, p) {
+  return pad(d.getMonth() + 1, p, 2);
+}
+
+function formatMinutes(d, p) {
+  return pad(d.getMinutes(), p, 2);
+}
+
+function formatSeconds(d, p) {
+  return pad(d.getSeconds(), p, 2);
+}
+
+function formatWeekdayNumberMonday(d) {
+  var day$$1 = d.getDay();
+  return day$$1 === 0 ? 7 : day$$1;
+}
+
+function formatWeekNumberSunday(d, p) {
+  return pad(sunday.count(year(d), d), p, 2);
+}
+
+function formatWeekNumberISO(d, p) {
+  var day$$1 = d.getDay();
+  d = (day$$1 >= 4 || day$$1 === 0) ? thursday(d) : thursday.ceil(d);
+  return pad(thursday.count(year(d), d) + (year(d).getDay() === 4), p, 2);
+}
+
+function formatWeekdayNumberSunday(d) {
+  return d.getDay();
+}
+
+function formatWeekNumberMonday(d, p) {
+  return pad(monday.count(year(d), d), p, 2);
+}
+
+function formatYear(d, p) {
+  return pad(d.getFullYear() % 100, p, 2);
+}
+
+function formatFullYear(d, p) {
+  return pad(d.getFullYear() % 10000, p, 4);
+}
+
+function formatZone(d) {
+  var z = d.getTimezoneOffset();
+  return (z > 0 ? "-" : (z *= -1, "+"))
+      + pad(z / 60 | 0, "0", 2)
+      + pad(z % 60, "0", 2);
+}
+
+function formatUTCDayOfMonth(d, p) {
+  return pad(d.getUTCDate(), p, 2);
+}
+
+function formatUTCHour24(d, p) {
+  return pad(d.getUTCHours(), p, 2);
+}
+
+function formatUTCHour12(d, p) {
+  return pad(d.getUTCHours() % 12 || 12, p, 2);
+}
+
+function formatUTCDayOfYear(d, p) {
+  return pad(1 + utcDay.count(utcYear(d), d), p, 3);
+}
+
+function formatUTCMilliseconds(d, p) {
+  return pad(d.getUTCMilliseconds(), p, 3);
+}
+
+function formatUTCMicroseconds(d, p) {
+  return formatUTCMilliseconds(d, p) + "000";
+}
+
+function formatUTCMonthNumber(d, p) {
+  return pad(d.getUTCMonth() + 1, p, 2);
+}
+
+function formatUTCMinutes(d, p) {
+  return pad(d.getUTCMinutes(), p, 2);
+}
+
+function formatUTCSeconds(d, p) {
+  return pad(d.getUTCSeconds(), p, 2);
+}
+
+function formatUTCWeekdayNumberMonday(d) {
+  var dow = d.getUTCDay();
+  return dow === 0 ? 7 : dow;
+}
+
+function formatUTCWeekNumberSunday(d, p) {
+  return pad(utcSunday.count(utcYear(d), d), p, 2);
+}
+
+function formatUTCWeekNumberISO(d, p) {
+  var day$$1 = d.getUTCDay();
+  d = (day$$1 >= 4 || day$$1 === 0) ? utcThursday(d) : utcThursday.ceil(d);
+  return pad(utcThursday.count(utcYear(d), d) + (utcYear(d).getUTCDay() === 4), p, 2);
+}
+
+function formatUTCWeekdayNumberSunday(d) {
+  return d.getUTCDay();
+}
+
+function formatUTCWeekNumberMonday(d, p) {
+  return pad(utcMonday.count(utcYear(d), d), p, 2);
+}
+
+function formatUTCYear(d, p) {
+  return pad(d.getUTCFullYear() % 100, p, 2);
+}
+
+function formatUTCFullYear(d, p) {
+  return pad(d.getUTCFullYear() % 10000, p, 4);
+}
+
+function formatUTCZone() {
+  return "+0000";
+}
+
+function formatLiteralPercent() {
+  return "%";
+}
+
+function formatUnixTimestamp(d) {
+  return +d;
+}
+
+function formatUnixTimestampSeconds(d) {
+  return Math.floor(+d / 1000);
+}
+
+var locale$1;
+
+defaultLocale$1({
+  dateTime: "%x, %X",
+  date: "%-m/%-d/%Y",
+  time: "%-I:%M:%S %p",
+  periods: ["AM", "PM"],
+  days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
+  shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
+  months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
+  shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
+});
+
+function defaultLocale$1(definition) {
+  locale$1 = formatLocale$1(definition);
+  exports.timeFormat = locale$1.format;
+  exports.timeParse = locale$1.parse;
+  exports.utcFormat = locale$1.utcFormat;
+  exports.utcParse = locale$1.utcParse;
+  return locale$1;
+}
+
+var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";
+
+function formatIsoNative(date) {
+  return date.toISOString();
+}
+
+var formatIso = Date.prototype.toISOString
+    ? formatIsoNative
+    : exports.utcFormat(isoSpecifier);
+
+function parseIsoNative(string) {
+  var date = new Date(string);
+  return isNaN(date) ? null : date;
+}
+
+var parseIso = +new Date("2000-01-01T00:00:00.000Z")
+    ? parseIsoNative
+    : exports.utcParse(isoSpecifier);
+
+var durationSecond$1 = 1000,
+    durationMinute$1 = durationSecond$1 * 60,
+    durationHour$1 = durationMinute$1 * 60,
+    durationDay$1 = durationHour$1 * 24,
+    durationWeek$1 = durationDay$1 * 7,
+    durationMonth = durationDay$1 * 30,
+    durationYear = durationDay$1 * 365;
+
+function date$1(t) {
+  return new Date(t);
+}
+
+function number$3(t) {
+  return t instanceof Date ? +t : +new Date(+t);
+}
+
+function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {
+  var scale = continuous(deinterpolateLinear, reinterpolate),
+      invert = scale.invert,
+      domain = scale.domain;
+
+  var formatMillisecond = format(".%L"),
+      formatSecond = format(":%S"),
+      formatMinute = format("%I:%M"),
+      formatHour = format("%I %p"),
+      formatDay = format("%a %d"),
+      formatWeek = format("%b %d"),
+      formatMonth = format("%B"),
+      formatYear = format("%Y");
+
+  var tickIntervals = [
+    [second$$1,  1,      durationSecond$1],
+    [second$$1,  5,  5 * durationSecond$1],
+    [second$$1, 15, 15 * durationSecond$1],
+    [second$$1, 30, 30 * durationSecond$1],
+    [minute$$1,  1,      durationMinute$1],
+    [minute$$1,  5,  5 * durationMinute$1],
+    [minute$$1, 15, 15 * durationMinute$1],
+    [minute$$1, 30, 30 * durationMinute$1],
+    [  hour$$1,  1,      durationHour$1  ],
+    [  hour$$1,  3,  3 * durationHour$1  ],
+    [  hour$$1,  6,  6 * durationHour$1  ],
+    [  hour$$1, 12, 12 * durationHour$1  ],
+    [   day$$1,  1,      durationDay$1   ],
+    [   day$$1,  2,  2 * durationDay$1   ],
+    [  week,  1,      durationWeek$1  ],
+    [ month$$1,  1,      durationMonth ],
+    [ month$$1,  3,  3 * durationMonth ],
+    [  year$$1,  1,      durationYear  ]
+  ];
+
+  function tickFormat(date$$1) {
+    return (second$$1(date$$1) < date$$1 ? formatMillisecond
+        : minute$$1(date$$1) < date$$1 ? formatSecond
+        : hour$$1(date$$1) < date$$1 ? formatMinute
+        : day$$1(date$$1) < date$$1 ? formatHour
+        : month$$1(date$$1) < date$$1 ? (week(date$$1) < date$$1 ? formatDay : formatWeek)
+        : year$$1(date$$1) < date$$1 ? formatMonth
+        : formatYear)(date$$1);
+  }
+
+  function tickInterval(interval, start, stop, step) {
+    if (interval == null) interval = 10;
+
+    // If a desired tick count is specified, pick a reasonable tick interval
+    // based on the extent of the domain and a rough estimate of tick size.
+    // Otherwise, assume interval is already a time interval and use it.
+    if (typeof interval === "number") {
+      var target = Math.abs(stop - start) / interval,
+          i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);
+      if (i === tickIntervals.length) {
+        step = tickStep(start / durationYear, stop / durationYear, interval);
+        interval = year$$1;
+      } else if (i) {
+        i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
+        step = i[1];
+        interval = i[0];
+      } else {
+        step = Math.max(tickStep(start, stop, interval), 1);
+        interval = millisecond$$1;
+      }
+    }
+
+    return step == null ? interval : interval.every(step);
+  }
+
+  scale.invert = function(y) {
+    return new Date(invert(y));
+  };
+
+  scale.domain = function(_) {
+    return arguments.length ? domain(map$2.call(_, number$3)) : domain().map(date$1);
+  };
+
+  scale.ticks = function(interval, step) {
+    var d = domain(),
+        t0 = d[0],
+        t1 = d[d.length - 1],
+        r = t1 < t0,
+        t;
+    if (r) t = t0, t0 = t1, t1 = t;
+    t = tickInterval(interval, t0, t1, step);
+    t = t ? t.range(t0, t1 + 1) : []; // inclusive stop
+    return r ? t.reverse() : t;
+  };
+
+  scale.tickFormat = function(count, specifier) {
+    return specifier == null ? tickFormat : format(specifier);
+  };
+
+  scale.nice = function(interval, step) {
+    var d = domain();
+    return (interval = tickInterval(interval, d[0], d[d.length - 1], step))
+        ? domain(nice(d, interval))
+        : scale;
+  };
+
+  scale.copy = function() {
+    return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format));
+  };
+
+  return scale;
+}
+
+function time() {
+  return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);
+}
+
+function utcTime() {
+  return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);
+}
+
+function sequential(interpolator) {
+  var x0 = 0,
+      x1 = 1,
+      k10 = 1,
+      clamp = false;
+
+  function scale(x) {
+    var t = (x - x0) * k10;
+    return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (x0 = +_[0], x1 = +_[1], k10 = x0 === x1 ? 0 : 1 / (x1 - x0), scale) : [x0, x1];
+  };
+
+  scale.clamp = function(_) {
+    return arguments.length ? (clamp = !!_, scale) : clamp;
+  };
+
+  scale.interpolator = function(_) {
+    return arguments.length ? (interpolator = _, scale) : interpolator;
+  };
+
+  scale.copy = function() {
+    return sequential(interpolator).domain([x0, x1]).clamp(clamp);
+  };
+
+  return linearish(scale);
+}
+
+function diverging(interpolator) {
+  var x0 = 0,
+      x1 = 0.5,
+      x2 = 1,
+      k10 = 1,
+      k21 = 1,
+      clamp = false;
+
+  function scale(x) {
+    var t = 0.5 + ((x = +x) - x1) * (x < x1 ? k10 : k21);
+    return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (x0 = +_[0], x1 = +_[1], x2 = +_[2], k10 = x0 === x1 ? 0 : 0.5 / (x1 - x0), k21 = x1 === x2 ? 0 : 0.5 / (x2 - x1), scale) : [x0, x1, x2];
+  };
+
+  scale.clamp = function(_) {
+    return arguments.length ? (clamp = !!_, scale) : clamp;
+  };
+
+  scale.interpolator = function(_) {
+    return arguments.length ? (interpolator = _, scale) : interpolator;
+  };
+
+  scale.copy = function() {
+    return diverging(interpolator).domain([x0, x1, x2]).clamp(clamp);
+  };
+
+  return linearish(scale);
+}
+
+function colors(specifier) {
+  var n = specifier.length / 6 | 0, colors = new Array(n), i = 0;
+  while (i < n) colors[i] = "#" + specifier.slice(i * 6, ++i * 6);
+  return colors;
+}
+
+var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");
+
+var Accent = colors("7fc97fbeaed4fdc086ffff99386cb0f0027fbf5b17666666");
+
+var Dark2 = colors("1b9e77d95f027570b3e7298a66a61ee6ab02a6761d666666");
+
+var Paired = colors("a6cee31f78b4b2df8a33a02cfb9a99e31a1cfdbf6fff7f00cab2d66a3d9affff99b15928");
+
+var Pastel1 = colors("fbb4aeb3cde3ccebc5decbe4fed9a6ffffcce5d8bdfddaecf2f2f2");
+
+var Pastel2 = colors("b3e2cdfdcdaccbd5e8f4cae4e6f5c9fff2aef1e2cccccccc");
+
+var Set1 = colors("e41a1c377eb84daf4a984ea3ff7f00ffff33a65628f781bf999999");
+
+var Set2 = colors("66c2a5fc8d628da0cbe78ac3a6d854ffd92fe5c494b3b3b3");
+
+var Set3 = colors("8dd3c7ffffb3bebadafb807280b1d3fdb462b3de69fccde5d9d9d9bc80bdccebc5ffed6f");
+
+function ramp(scheme) {
+  return rgbBasis(scheme[scheme.length - 1]);
+}
+
+var scheme = new Array(3).concat(
+  "d8b365f5f5f55ab4ac",
+  "a6611adfc27d80cdc1018571",
+  "a6611adfc27df5f5f580cdc1018571",
+  "8c510ad8b365f6e8c3c7eae55ab4ac01665e",
+  "8c510ad8b365f6e8c3f5f5f5c7eae55ab4ac01665e",
+  "8c510abf812ddfc27df6e8c3c7eae580cdc135978f01665e",
+  "8c510abf812ddfc27df6e8c3f5f5f5c7eae580cdc135978f01665e",
+  "5430058c510abf812ddfc27df6e8c3c7eae580cdc135978f01665e003c30",
+  "5430058c510abf812ddfc27df6e8c3f5f5f5c7eae580cdc135978f01665e003c30"
+).map(colors);
+
+var BrBG = ramp(scheme);
+
+var scheme$1 = new Array(3).concat(
+  "af8dc3f7f7f77fbf7b",
+  "7b3294c2a5cfa6dba0008837",
+  "7b3294c2a5cff7f7f7a6dba0008837",
+  "762a83af8dc3e7d4e8d9f0d37fbf7b1b7837",
+  "762a83af8dc3e7d4e8f7f7f7d9f0d37fbf7b1b7837",
+  "762a839970abc2a5cfe7d4e8d9f0d3a6dba05aae611b7837",
+  "762a839970abc2a5cfe7d4e8f7f7f7d9f0d3a6dba05aae611b7837",
+  "40004b762a839970abc2a5cfe7d4e8d9f0d3a6dba05aae611b783700441b",
+  "40004b762a839970abc2a5cfe7d4e8f7f7f7d9f0d3a6dba05aae611b783700441b"
+).map(colors);
+
+var PRGn = ramp(scheme$1);
+
+var scheme$2 = new Array(3).concat(
+  "e9a3c9f7f7f7a1d76a",
+  "d01c8bf1b6dab8e1864dac26",
+  "d01c8bf1b6daf7f7f7b8e1864dac26",
+  "c51b7de9a3c9fde0efe6f5d0a1d76a4d9221",
+  "c51b7de9a3c9fde0eff7f7f7e6f5d0a1d76a4d9221",
+  "c51b7dde77aef1b6dafde0efe6f5d0b8e1867fbc414d9221",
+  "c51b7dde77aef1b6dafde0eff7f7f7e6f5d0b8e1867fbc414d9221",
+  "8e0152c51b7dde77aef1b6dafde0efe6f5d0b8e1867fbc414d9221276419",
+  "8e0152c51b7dde77aef1b6dafde0eff7f7f7e6f5d0b8e1867fbc414d9221276419"
+).map(colors);
+
+var PiYG = ramp(scheme$2);
+
+var scheme$3 = new Array(3).concat(
+  "998ec3f7f7f7f1a340",
+  "5e3c99b2abd2fdb863e66101",
+  "5e3c99b2abd2f7f7f7fdb863e66101",
+  "542788998ec3d8daebfee0b6f1a340b35806",
+  "542788998ec3d8daebf7f7f7fee0b6f1a340b35806",
+  "5427888073acb2abd2d8daebfee0b6fdb863e08214b35806",
+  "5427888073acb2abd2d8daebf7f7f7fee0b6fdb863e08214b35806",
+  "2d004b5427888073acb2abd2d8daebfee0b6fdb863e08214b358067f3b08",
+  "2d004b5427888073acb2abd2d8daebf7f7f7fee0b6fdb863e08214b358067f3b08"
+).map(colors);
+
+var PuOr = ramp(scheme$3);
+
+var scheme$4 = new Array(3).concat(
+  "ef8a62f7f7f767a9cf",
+  "ca0020f4a58292c5de0571b0",
+  "ca0020f4a582f7f7f792c5de0571b0",
+  "b2182bef8a62fddbc7d1e5f067a9cf2166ac",
+  "b2182bef8a62fddbc7f7f7f7d1e5f067a9cf2166ac",
+  "b2182bd6604df4a582fddbc7d1e5f092c5de4393c32166ac",
+  "b2182bd6604df4a582fddbc7f7f7f7d1e5f092c5de4393c32166ac",
+  "67001fb2182bd6604df4a582fddbc7d1e5f092c5de4393c32166ac053061",
+  "67001fb2182bd6604df4a582fddbc7f7f7f7d1e5f092c5de4393c32166ac053061"
+).map(colors);
+
+var RdBu = ramp(scheme$4);
+
+var scheme$5 = new Array(3).concat(
+  "ef8a62ffffff999999",
+  "ca0020f4a582bababa404040",
+  "ca0020f4a582ffffffbababa404040",
+  "b2182bef8a62fddbc7e0e0e09999994d4d4d",
+  "b2182bef8a62fddbc7ffffffe0e0e09999994d4d4d",
+  "b2182bd6604df4a582fddbc7e0e0e0bababa8787874d4d4d",
+  "b2182bd6604df4a582fddbc7ffffffe0e0e0bababa8787874d4d4d",
+  "67001fb2182bd6604df4a582fddbc7e0e0e0bababa8787874d4d4d1a1a1a",
+  "67001fb2182bd6604df4a582fddbc7ffffffe0e0e0bababa8787874d4d4d1a1a1a"
+).map(colors);
+
+var RdGy = ramp(scheme$5);
+
+var scheme$6 = new Array(3).concat(
+  "fc8d59ffffbf91bfdb",
+  "d7191cfdae61abd9e92c7bb6",
+  "d7191cfdae61ffffbfabd9e92c7bb6",
+  "d73027fc8d59fee090e0f3f891bfdb4575b4",
+  "d73027fc8d59fee090ffffbfe0f3f891bfdb4575b4",
+  "d73027f46d43fdae61fee090e0f3f8abd9e974add14575b4",
+  "d73027f46d43fdae61fee090ffffbfe0f3f8abd9e974add14575b4",
+  "a50026d73027f46d43fdae61fee090e0f3f8abd9e974add14575b4313695",
+  "a50026d73027f46d43fdae61fee090ffffbfe0f3f8abd9e974add14575b4313695"
+).map(colors);
+
+var RdYlBu = ramp(scheme$6);
+
+var scheme$7 = new Array(3).concat(
+  "fc8d59ffffbf91cf60",
+  "d7191cfdae61a6d96a1a9641",
+  "d7191cfdae61ffffbfa6d96a1a9641",
+  "d73027fc8d59fee08bd9ef8b91cf601a9850",
+  "d73027fc8d59fee08bffffbfd9ef8b91cf601a9850",
+  "d73027f46d43fdae61fee08bd9ef8ba6d96a66bd631a9850",
+  "d73027f46d43fdae61fee08bffffbfd9ef8ba6d96a66bd631a9850",
+  "a50026d73027f46d43fdae61fee08bd9ef8ba6d96a66bd631a9850006837",
+  "a50026d73027f46d43fdae61fee08bffffbfd9ef8ba6d96a66bd631a9850006837"
+).map(colors);
+
+var RdYlGn = ramp(scheme$7);
+
+var scheme$8 = new Array(3).concat(
+  "fc8d59ffffbf99d594",
+  "d7191cfdae61abdda42b83ba",
+  "d7191cfdae61ffffbfabdda42b83ba",
+  "d53e4ffc8d59fee08be6f59899d5943288bd",
+  "d53e4ffc8d59fee08bffffbfe6f59899d5943288bd",
+  "d53e4ff46d43fdae61fee08be6f598abdda466c2a53288bd",
+  "d53e4ff46d43fdae61fee08bffffbfe6f598abdda466c2a53288bd",
+  "9e0142d53e4ff46d43fdae61fee08be6f598abdda466c2a53288bd5e4fa2",
+  "9e0142d53e4ff46d43fdae61fee08bffffbfe6f598abdda466c2a53288bd5e4fa2"
+).map(colors);
+
+var Spectral = ramp(scheme$8);
+
+var scheme$9 = new Array(3).concat(
+  "e5f5f999d8c92ca25f",
+  "edf8fbb2e2e266c2a4238b45",
+  "edf8fbb2e2e266c2a42ca25f006d2c",
+  "edf8fbccece699d8c966c2a42ca25f006d2c",
+  "edf8fbccece699d8c966c2a441ae76238b45005824",
+  "f7fcfde5f5f9ccece699d8c966c2a441ae76238b45005824",
+  "f7fcfde5f5f9ccece699d8c966c2a441ae76238b45006d2c00441b"
+).map(colors);
+
+var BuGn = ramp(scheme$9);
+
+var scheme$10 = new Array(3).concat(
+  "e0ecf49ebcda8856a7",
+  "edf8fbb3cde38c96c688419d",
+  "edf8fbb3cde38c96c68856a7810f7c",
+  "edf8fbbfd3e69ebcda8c96c68856a7810f7c",
+  "edf8fbbfd3e69ebcda8c96c68c6bb188419d6e016b",
+  "f7fcfde0ecf4bfd3e69ebcda8c96c68c6bb188419d6e016b",
+  "f7fcfde0ecf4bfd3e69ebcda8c96c68c6bb188419d810f7c4d004b"
+).map(colors);
+
+var BuPu = ramp(scheme$10);
+
+var scheme$11 = new Array(3).concat(
+  "e0f3dba8ddb543a2ca",
+  "f0f9e8bae4bc7bccc42b8cbe",
+  "f0f9e8bae4bc7bccc443a2ca0868ac",
+  "f0f9e8ccebc5a8ddb57bccc443a2ca0868ac",
+  "f0f9e8ccebc5a8ddb57bccc44eb3d32b8cbe08589e",
+  "f7fcf0e0f3dbccebc5a8ddb57bccc44eb3d32b8cbe08589e",
+  "f7fcf0e0f3dbccebc5a8ddb57bccc44eb3d32b8cbe0868ac084081"
+).map(colors);
+
+var GnBu = ramp(scheme$11);
+
+var scheme$12 = new Array(3).concat(
+  "fee8c8fdbb84e34a33",
+  "fef0d9fdcc8afc8d59d7301f",
+  "fef0d9fdcc8afc8d59e34a33b30000",
+  "fef0d9fdd49efdbb84fc8d59e34a33b30000",
+  "fef0d9fdd49efdbb84fc8d59ef6548d7301f990000",
+  "fff7ecfee8c8fdd49efdbb84fc8d59ef6548d7301f990000",
+  "fff7ecfee8c8fdd49efdbb84fc8d59ef6548d7301fb300007f0000"
+).map(colors);
+
+var OrRd = ramp(scheme$12);
+
+var scheme$13 = new Array(3).concat(
+  "ece2f0a6bddb1c9099",
+  "f6eff7bdc9e167a9cf02818a",
+  "f6eff7bdc9e167a9cf1c9099016c59",
+  "f6eff7d0d1e6a6bddb67a9cf1c9099016c59",
+  "f6eff7d0d1e6a6bddb67a9cf3690c002818a016450",
+  "fff7fbece2f0d0d1e6a6bddb67a9cf3690c002818a016450",
+  "fff7fbece2f0d0d1e6a6bddb67a9cf3690c002818a016c59014636"
+).map(colors);
+
+var PuBuGn = ramp(scheme$13);
+
+var scheme$14 = new Array(3).concat(
+  "ece7f2a6bddb2b8cbe",
+  "f1eef6bdc9e174a9cf0570b0",
+  "f1eef6bdc9e174a9cf2b8cbe045a8d",
+  "f1eef6d0d1e6a6bddb74a9cf2b8cbe045a8d",
+  "f1eef6d0d1e6a6bddb74a9cf3690c00570b0034e7b",
+  "fff7fbece7f2d0d1e6a6bddb74a9cf3690c00570b0034e7b",
+  "fff7fbece7f2d0d1e6a6bddb74a9cf3690c00570b0045a8d023858"
+).map(colors);
+
+var PuBu = ramp(scheme$14);
+
+var scheme$15 = new Array(3).concat(
+  "e7e1efc994c7dd1c77",
+  "f1eef6d7b5d8df65b0ce1256",
+  "f1eef6d7b5d8df65b0dd1c77980043",
+  "f1eef6d4b9dac994c7df65b0dd1c77980043",
+  "f1eef6d4b9dac994c7df65b0e7298ace125691003f",
+  "f7f4f9e7e1efd4b9dac994c7df65b0e7298ace125691003f",
+  "f7f4f9e7e1efd4b9dac994c7df65b0e7298ace125698004367001f"
+).map(colors);
+
+var PuRd = ramp(scheme$15);
+
+var scheme$16 = new Array(3).concat(
+  "fde0ddfa9fb5c51b8a",
+  "feebe2fbb4b9f768a1ae017e",
+  "feebe2fbb4b9f768a1c51b8a7a0177",
+  "feebe2fcc5c0fa9fb5f768a1c51b8a7a0177",
+  "feebe2fcc5c0fa9fb5f768a1dd3497ae017e7a0177",
+  "fff7f3fde0ddfcc5c0fa9fb5f768a1dd3497ae017e7a0177",
+  "fff7f3fde0ddfcc5c0fa9fb5f768a1dd3497ae017e7a017749006a"
+).map(colors);
+
+var RdPu = ramp(scheme$16);
+
+var scheme$17 = new Array(3).concat(
+  "edf8b17fcdbb2c7fb8",
+  "ffffcca1dab441b6c4225ea8",
+  "ffffcca1dab441b6c42c7fb8253494",
+  "ffffccc7e9b47fcdbb41b6c42c7fb8253494",
+  "ffffccc7e9b47fcdbb41b6c41d91c0225ea80c2c84",
+  "ffffd9edf8b1c7e9b47fcdbb41b6c41d91c0225ea80c2c84",
+  "ffffd9edf8b1c7e9b47fcdbb41b6c41d91c0225ea8253494081d58"
+).map(colors);
+
+var YlGnBu = ramp(scheme$17);
+
+var scheme$18 = new Array(3).concat(
+  "f7fcb9addd8e31a354",
+  "ffffccc2e69978c679238443",
+  "ffffccc2e69978c67931a354006837",
+  "ffffccd9f0a3addd8e78c67931a354006837",
+  "ffffccd9f0a3addd8e78c67941ab5d238443005a32",
+  "ffffe5f7fcb9d9f0a3addd8e78c67941ab5d238443005a32",
+  "ffffe5f7fcb9d9f0a3addd8e78c67941ab5d238443006837004529"
+).map(colors);
+
+var YlGn = ramp(scheme$18);
+
+var scheme$19 = new Array(3).concat(
+  "fff7bcfec44fd95f0e",
+  "ffffd4fed98efe9929cc4c02",
+  "ffffd4fed98efe9929d95f0e993404",
+  "ffffd4fee391fec44ffe9929d95f0e993404",
+  "ffffd4fee391fec44ffe9929ec7014cc4c028c2d04",
+  "ffffe5fff7bcfee391fec44ffe9929ec7014cc4c028c2d04",
+  "ffffe5fff7bcfee391fec44ffe9929ec7014cc4c02993404662506"
+).map(colors);
+
+var YlOrBr = ramp(scheme$19);
+
+var scheme$20 = new Array(3).concat(
+  "ffeda0feb24cf03b20",
+  "ffffb2fecc5cfd8d3ce31a1c",
+  "ffffb2fecc5cfd8d3cf03b20bd0026",
+  "ffffb2fed976feb24cfd8d3cf03b20bd0026",
+  "ffffb2fed976feb24cfd8d3cfc4e2ae31a1cb10026",
+  "ffffccffeda0fed976feb24cfd8d3cfc4e2ae31a1cb10026",
+  "ffffccffeda0fed976feb24cfd8d3cfc4e2ae31a1cbd0026800026"
+).map(colors);
+
+var YlOrRd = ramp(scheme$20);
+
+var scheme$21 = new Array(3).concat(
+  "deebf79ecae13182bd",
+  "eff3ffbdd7e76baed62171b5",
+  "eff3ffbdd7e76baed63182bd08519c",
+  "eff3ffc6dbef9ecae16baed63182bd08519c",
+  "eff3ffc6dbef9ecae16baed64292c62171b5084594",
+  "f7fbffdeebf7c6dbef9ecae16baed64292c62171b5084594",
+  "f7fbffdeebf7c6dbef9ecae16baed64292c62171b508519c08306b"
+).map(colors);
+
+var Blues = ramp(scheme$21);
+
+var scheme$22 = new Array(3).concat(
+  "e5f5e0a1d99b31a354",
+  "edf8e9bae4b374c476238b45",
+  "edf8e9bae4b374c47631a354006d2c",
+  "edf8e9c7e9c0a1d99b74c47631a354006d2c",
+  "edf8e9c7e9c0a1d99b74c47641ab5d238b45005a32",
+  "f7fcf5e5f5e0c7e9c0a1d99b74c47641ab5d238b45005a32",
+  "f7fcf5e5f5e0c7e9c0a1d99b74c47641ab5d238b45006d2c00441b"
+).map(colors);
+
+var Greens = ramp(scheme$22);
+
+var scheme$23 = new Array(3).concat(
+  "f0f0f0bdbdbd636363",
+  "f7f7f7cccccc969696525252",
+  "f7f7f7cccccc969696636363252525",
+  "f7f7f7d9d9d9bdbdbd969696636363252525",
+  "f7f7f7d9d9d9bdbdbd969696737373525252252525",
+  "fffffff0f0f0d9d9d9bdbdbd969696737373525252252525",
+  "fffffff0f0f0d9d9d9bdbdbd969696737373525252252525000000"
+).map(colors);
+
+var Greys = ramp(scheme$23);
+
+var scheme$24 = new Array(3).concat(
+  "efedf5bcbddc756bb1",
+  "f2f0f7cbc9e29e9ac86a51a3",
+  "f2f0f7cbc9e29e9ac8756bb154278f",
+  "f2f0f7dadaebbcbddc9e9ac8756bb154278f",
+  "f2f0f7dadaebbcbddc9e9ac8807dba6a51a34a1486",
+  "fcfbfdefedf5dadaebbcbddc9e9ac8807dba6a51a34a1486",
+  "fcfbfdefedf5dadaebbcbddc9e9ac8807dba6a51a354278f3f007d"
+).map(colors);
+
+var Purples = ramp(scheme$24);
+
+var scheme$25 = new Array(3).concat(
+  "fee0d2fc9272de2d26",
+  "fee5d9fcae91fb6a4acb181d",
+  "fee5d9fcae91fb6a4ade2d26a50f15",
+  "fee5d9fcbba1fc9272fb6a4ade2d26a50f15",
+  "fee5d9fcbba1fc9272fb6a4aef3b2ccb181d99000d",
+  "fff5f0fee0d2fcbba1fc9272fb6a4aef3b2ccb181d99000d",
+  "fff5f0fee0d2fcbba1fc9272fb6a4aef3b2ccb181da50f1567000d"
+).map(colors);
+
+var Reds = ramp(scheme$25);
+
+var scheme$26 = new Array(3).concat(
+  "fee6cefdae6be6550d",
+  "feeddefdbe85fd8d3cd94701",
+  "feeddefdbe85fd8d3ce6550da63603",
+  "feeddefdd0a2fdae6bfd8d3ce6550da63603",
+  "feeddefdd0a2fdae6bfd8d3cf16913d948018c2d04",
+  "fff5ebfee6cefdd0a2fdae6bfd8d3cf16913d948018c2d04",
+  "fff5ebfee6cefdd0a2fdae6bfd8d3cf16913d94801a636037f2704"
+).map(colors);
+
+var Oranges = ramp(scheme$26);
+
+var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));
+
+var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
+
+var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
+
+var c = cubehelix();
+
+function rainbow(t) {
+  if (t < 0 || t > 1) t -= Math.floor(t);
+  var ts = Math.abs(t - 0.5);
+  c.h = 360 * t - 100;
+  c.s = 1.5 - 1.5 * ts;
+  c.l = 0.8 - 0.9 * ts;
+  return c + "";
+}
+
+var c$1 = rgb(),
+    pi_1_3 = Math.PI / 3,
+    pi_2_3 = Math.PI * 2 / 3;
+
+function sinebow(t) {
+  var x;
+  t = (0.5 - t) * Math.PI;
+  c$1.r = 255 * (x = Math.sin(t)) * x;
+  c$1.g = 255 * (x = Math.sin(t + pi_1_3)) * x;
+  c$1.b = 255 * (x = Math.sin(t + pi_2_3)) * x;
+  return c$1 + "";
+}
+
+function ramp$1(range) {
+  var n = range.length;
+  return function(t) {
+    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
+  };
+}
+
+var viridis = ramp$1(colors("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"));
+
+var magma = ramp$1(colors("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"));
+
+var inferno = ramp$1(colors("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"));
+
+var plasma = ramp$1(colors("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"));
+
+function constant$11(x) {
+  return function constant() {
+    return x;
+  };
+}
+
+var abs$1 = Math.abs;
+var atan2$1 = Math.atan2;
+var cos$2 = Math.cos;
+var max$2 = Math.max;
+var min$1 = Math.min;
+var sin$2 = Math.sin;
+var sqrt$2 = Math.sqrt;
+
+var epsilon$3 = 1e-12;
+var pi$4 = Math.PI;
+var halfPi$3 = pi$4 / 2;
+var tau$4 = 2 * pi$4;
+
+function acos$1(x) {
+  return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x);
+}
+
+function asin$1(x) {
+  return x >= 1 ? halfPi$3 : x <= -1 ? -halfPi$3 : Math.asin(x);
+}
+
+function arcInnerRadius(d) {
+  return d.innerRadius;
+}
+
+function arcOuterRadius(d) {
+  return d.outerRadius;
+}
+
+function arcStartAngle(d) {
+  return d.startAngle;
+}
+
+function arcEndAngle(d) {
+  return d.endAngle;
+}
+
+function arcPadAngle(d) {
+  return d && d.padAngle; // Note: optional!
+}
+
+function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
+  var x10 = x1 - x0, y10 = y1 - y0,
+      x32 = x3 - x2, y32 = y3 - y2,
+      t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);
+  return [x0 + t * x10, y0 + t * y10];
+}
+
+// Compute perpendicular offset line of length rc.
+// http://mathworld.wolfram.com/Circle-LineIntersection.html
+function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
+  var x01 = x0 - x1,
+      y01 = y0 - y1,
+      lo = (cw ? rc : -rc) / sqrt$2(x01 * x01 + y01 * y01),
+      ox = lo * y01,
+      oy = -lo * x01,
+      x11 = x0 + ox,
+      y11 = y0 + oy,
+      x10 = x1 + ox,
+      y10 = y1 + oy,
+      x00 = (x11 + x10) / 2,
+      y00 = (y11 + y10) / 2,
+      dx = x10 - x11,
+      dy = y10 - y11,
+      d2 = dx * dx + dy * dy,
+      r = r1 - rc,
+      D = x11 * y10 - x10 * y11,
+      d = (dy < 0 ? -1 : 1) * sqrt$2(max$2(0, r * r * d2 - D * D)),
+      cx0 = (D * dy - dx * d) / d2,
+      cy0 = (-D * dx - dy * d) / d2,
+      cx1 = (D * dy + dx * d) / d2,
+      cy1 = (-D * dx + dy * d) / d2,
+      dx0 = cx0 - x00,
+      dy0 = cy0 - y00,
+      dx1 = cx1 - x00,
+      dy1 = cy1 - y00;
+
+  // Pick the closer of the two intersection points.
+  // TODO Is there a faster way to determine which intersection to use?
+  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
+
+  return {
+    cx: cx0,
+    cy: cy0,
+    x01: -ox,
+    y01: -oy,
+    x11: cx0 * (r1 / r - 1),
+    y11: cy0 * (r1 / r - 1)
+  };
+}
+
+function arc() {
+  var innerRadius = arcInnerRadius,
+      outerRadius = arcOuterRadius,
+      cornerRadius = constant$11(0),
+      padRadius = null,
+      startAngle = arcStartAngle,
+      endAngle = arcEndAngle,
+      padAngle = arcPadAngle,
+      context = null;
+
+  function arc() {
+    var buffer,
+        r,
+        r0 = +innerRadius.apply(this, arguments),
+        r1 = +outerRadius.apply(this, arguments),
+        a0 = startAngle.apply(this, arguments) - halfPi$3,
+        a1 = endAngle.apply(this, arguments) - halfPi$3,
+        da = abs$1(a1 - a0),
+        cw = a1 > a0;
+
+    if (!context) context = buffer = path();
+
+    // Ensure that the outer radius is always larger than the inner radius.
+    if (r1 < r0) r = r1, r1 = r0, r0 = r;
+
+    // Is it a point?
+    if (!(r1 > epsilon$3)) context.moveTo(0, 0);
+
+    // Or is it a circle or annulus?
+    else if (da > tau$4 - epsilon$3) {
+      context.moveTo(r1 * cos$2(a0), r1 * sin$2(a0));
+      context.arc(0, 0, r1, a0, a1, !cw);
+      if (r0 > epsilon$3) {
+        context.moveTo(r0 * cos$2(a1), r0 * sin$2(a1));
+        context.arc(0, 0, r0, a1, a0, cw);
+      }
+    }
+
+    // Or is it a circular or annular sector?
+    else {
+      var a01 = a0,
+          a11 = a1,
+          a00 = a0,
+          a10 = a1,
+          da0 = da,
+          da1 = da,
+          ap = padAngle.apply(this, arguments) / 2,
+          rp = (ap > epsilon$3) && (padRadius ? +padRadius.apply(this, arguments) : sqrt$2(r0 * r0 + r1 * r1)),
+          rc = min$1(abs$1(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
+          rc0 = rc,
+          rc1 = rc,
+          t0,
+          t1;
+
+      // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
+      if (rp > epsilon$3) {
+        var p0 = asin$1(rp / r0 * sin$2(ap)),
+            p1 = asin$1(rp / r1 * sin$2(ap));
+        if ((da0 -= p0 * 2) > epsilon$3) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
+        else da0 = 0, a00 = a10 = (a0 + a1) / 2;
+        if ((da1 -= p1 * 2) > epsilon$3) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
+        else da1 = 0, a01 = a11 = (a0 + a1) / 2;
+      }
+
+      var x01 = r1 * cos$2(a01),
+          y01 = r1 * sin$2(a01),
+          x10 = r0 * cos$2(a10),
+          y10 = r0 * sin$2(a10);
+
+      // Apply rounded corners?
+      if (rc > epsilon$3) {
+        var x11 = r1 * cos$2(a11),
+            y11 = r1 * sin$2(a11),
+            x00 = r0 * cos$2(a00),
+            y00 = r0 * sin$2(a00);
+
+        // Restrict the corner radius according to the sector angle.
+        if (da < pi$4) {
+          var oc = da0 > epsilon$3 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],
+              ax = x01 - oc[0],
+              ay = y01 - oc[1],
+              bx = x11 - oc[0],
+              by = y11 - oc[1],
+              kc = 1 / sin$2(acos$1((ax * bx + ay * by) / (sqrt$2(ax * ax + ay * ay) * sqrt$2(bx * bx + by * by))) / 2),
+              lc = sqrt$2(oc[0] * oc[0] + oc[1] * oc[1]);
+          rc0 = min$1(rc, (r0 - lc) / (kc - 1));
+          rc1 = min$1(rc, (r1 - lc) / (kc + 1));
+        }
+      }
+
+      // Is the sector collapsed to a line?
+      if (!(da1 > epsilon$3)) context.moveTo(x01, y01);
+
+      // Does the sector’s outer ring have rounded corners?
+      else if (rc1 > epsilon$3) {
+        t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
+        t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);
+
+        context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);
+
+        // Have the corners merged?
+        if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);
+
+        // Otherwise, draw the two corners and the ring.
+        else {
+          context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);
+          context.arc(0, 0, r1, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
+          context.arc(t1.cx, t1.cy, rc1, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);
+        }
+      }
+
+      // Or is the outer ring just a circular arc?
+      else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);
+
+      // Is there no inner ring, and it’s a circular sector?
+      // Or perhaps it’s an annular sector collapsed due to padding?
+      if (!(r0 > epsilon$3) || !(da0 > epsilon$3)) context.lineTo(x10, y10);
+
+      // Does the sector’s inner ring (or point) have rounded corners?
+      else if (rc0 > epsilon$3) {
+        t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
+        t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);
+
+        context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);
+
+        // Have the corners merged?
+        if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);
+
+        // Otherwise, draw the two corners and the ring.
+        else {
+          context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);
+          context.arc(0, 0, r0, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), cw);
+          context.arc(t1.cx, t1.cy, rc0, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);
+        }
+      }
+
+      // Or is the inner ring just a circular arc?
+      else context.arc(0, 0, r0, a10, a00, cw);
+    }
+
+    context.closePath();
+
+    if (buffer) return context = null, buffer + "" || null;
+  }
+
+  arc.centroid = function() {
+    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
+        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$4 / 2;
+    return [cos$2(a) * r, sin$2(a) * r];
+  };
+
+  arc.innerRadius = function(_) {
+    return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$11(+_), arc) : innerRadius;
+  };
+
+  arc.outerRadius = function(_) {
+    return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$11(+_), arc) : outerRadius;
+  };
+
+  arc.cornerRadius = function(_) {
+    return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$11(+_), arc) : cornerRadius;
+  };
+
+  arc.padRadius = function(_) {
+    return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$11(+_), arc) : padRadius;
+  };
+
+  arc.startAngle = function(_) {
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$11(+_), arc) : startAngle;
+  };
+
+  arc.endAngle = function(_) {
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$11(+_), arc) : endAngle;
+  };
+
+  arc.padAngle = function(_) {
+    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$11(+_), arc) : padAngle;
+  };
+
+  arc.context = function(_) {
+    return arguments.length ? (context = _ == null ? null : _, arc) : context;
+  };
+
+  return arc;
+}
+
+function Linear(context) {
+  this._context = context;
+}
+
+Linear.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; // proceed
+      default: this._context.lineTo(x, y); break;
+    }
+  }
+};
+
+function curveLinear(context) {
+  return new Linear(context);
+}
+
+function x$3(p) {
+  return p[0];
+}
+
+function y$3(p) {
+  return p[1];
+}
+
+function line() {
+  var x$$1 = x$3,
+      y$$1 = y$3,
+      defined = constant$11(true),
+      context = null,
+      curve = curveLinear,
+      output = null;
+
+  function line(data) {
+    var i,
+        n = data.length,
+        d,
+        defined0 = false,
+        buffer;
+
+    if (context == null) output = curve(buffer = path());
+
+    for (i = 0; i <= n; ++i) {
+      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
+        if (defined0 = !defined0) output.lineStart();
+        else output.lineEnd();
+      }
+      if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));
+    }
+
+    if (buffer) return output = null, buffer + "" || null;
+  }
+
+  line.x = function(_) {
+    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$11(+_), line) : x$$1;
+  };
+
+  line.y = function(_) {
+    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$11(+_), line) : y$$1;
+  };
+
+  line.defined = function(_) {
+    return arguments.length ? (defined = typeof _ === "function" ? _ : constant$11(!!_), line) : defined;
+  };
+
+  line.curve = function(_) {
+    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
+  };
+
+  line.context = function(_) {
+    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
+  };
+
+  return line;
+}
+
+function area$3() {
+  var x0 = x$3,
+      x1 = null,
+      y0 = constant$11(0),
+      y1 = y$3,
+      defined = constant$11(true),
+      context = null,
+      curve = curveLinear,
+      output = null;
+
+  function area(data) {
+    var i,
+        j,
+        k,
+        n = data.length,
+        d,
+        defined0 = false,
+        buffer,
+        x0z = new Array(n),
+        y0z = new Array(n);
+
+    if (context == null) output = curve(buffer = path());
+
+    for (i = 0; i <= n; ++i) {
+      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
+        if (defined0 = !defined0) {
+          j = i;
+          output.areaStart();
+          output.lineStart();
+        } else {
+          output.lineEnd();
+          output.lineStart();
+          for (k = i - 1; k >= j; --k) {
+            output.point(x0z[k], y0z[k]);
+          }
+          output.lineEnd();
+          output.areaEnd();
+        }
+      }
+      if (defined0) {
+        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
+        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
+      }
+    }
+
+    if (buffer) return output = null, buffer + "" || null;
+  }
+
+  function arealine() {
+    return line().defined(defined).curve(curve).context(context);
+  }
+
+  area.x = function(_) {
+    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$11(+_), x1 = null, area) : x0;
+  };
+
+  area.x0 = function(_) {
+    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$11(+_), area) : x0;
+  };
+
+  area.x1 = function(_) {
+    return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$11(+_), area) : x1;
+  };
+
+  area.y = function(_) {
+    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$11(+_), y1 = null, area) : y0;
+  };
+
+  area.y0 = function(_) {
+    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$11(+_), area) : y0;
+  };
+
+  area.y1 = function(_) {
+    return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$11(+_), area) : y1;
+  };
+
+  area.lineX0 =
+  area.lineY0 = function() {
+    return arealine().x(x0).y(y0);
+  };
+
+  area.lineY1 = function() {
+    return arealine().x(x0).y(y1);
+  };
+
+  area.lineX1 = function() {
+    return arealine().x(x1).y(y0);
+  };
+
+  area.defined = function(_) {
+    return arguments.length ? (defined = typeof _ === "function" ? _ : constant$11(!!_), area) : defined;
+  };
+
+  area.curve = function(_) {
+    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
+  };
+
+  area.context = function(_) {
+    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
+  };
+
+  return area;
+}
+
+function descending$1(a, b) {
+  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+}
+
+function identity$7(d) {
+  return d;
+}
+
+function pie() {
+  var value = identity$7,
+      sortValues = descending$1,
+      sort = null,
+      startAngle = constant$11(0),
+      endAngle = constant$11(tau$4),
+      padAngle = constant$11(0);
+
+  function pie(data) {
+    var i,
+        n = data.length,
+        j,
+        k,
+        sum = 0,
+        index = new Array(n),
+        arcs = new Array(n),
+        a0 = +startAngle.apply(this, arguments),
+        da = Math.min(tau$4, Math.max(-tau$4, endAngle.apply(this, arguments) - a0)),
+        a1,
+        p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
+        pa = p * (da < 0 ? -1 : 1),
+        v;
+
+    for (i = 0; i < n; ++i) {
+      if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
+        sum += v;
+      }
+    }
+
+    // Optionally sort the arcs by previously-computed values or by data.
+    if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
+    else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });
+
+    // Compute the arcs! They are stored in the original data's order.
+    for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
+      j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
+        data: data[j],
+        index: i,
+        value: v,
+        startAngle: a0,
+        endAngle: a1,
+        padAngle: p
+      };
+    }
+
+    return arcs;
+  }
+
+  pie.value = function(_) {
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant$11(+_), pie) : value;
+  };
+
+  pie.sortValues = function(_) {
+    return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
+  };
+
+  pie.sort = function(_) {
+    return arguments.length ? (sort = _, sortValues = null, pie) : sort;
+  };
+
+  pie.startAngle = function(_) {
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$11(+_), pie) : startAngle;
+  };
+
+  pie.endAngle = function(_) {
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$11(+_), pie) : endAngle;
+  };
+
+  pie.padAngle = function(_) {
+    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$11(+_), pie) : padAngle;
+  };
+
+  return pie;
+}
+
+var curveRadialLinear = curveRadial(curveLinear);
+
+function Radial(curve) {
+  this._curve = curve;
+}
+
+Radial.prototype = {
+  areaStart: function() {
+    this._curve.areaStart();
+  },
+  areaEnd: function() {
+    this._curve.areaEnd();
+  },
+  lineStart: function() {
+    this._curve.lineStart();
+  },
+  lineEnd: function() {
+    this._curve.lineEnd();
+  },
+  point: function(a, r) {
+    this._curve.point(r * Math.sin(a), r * -Math.cos(a));
+  }
+};
+
+function curveRadial(curve) {
+
+  function radial(context) {
+    return new Radial(curve(context));
+  }
+
+  radial._curve = curve;
+
+  return radial;
+}
+
+function lineRadial(l) {
+  var c = l.curve;
+
+  l.angle = l.x, delete l.x;
+  l.radius = l.y, delete l.y;
+
+  l.curve = function(_) {
+    return arguments.length ? c(curveRadial(_)) : c()._curve;
+  };
+
+  return l;
+}
+
+function lineRadial$1() {
+  return lineRadial(line().curve(curveRadialLinear));
+}
+
+function areaRadial() {
+  var a = area$3().curve(curveRadialLinear),
+      c = a.curve,
+      x0 = a.lineX0,
+      x1 = a.lineX1,
+      y0 = a.lineY0,
+      y1 = a.lineY1;
+
+  a.angle = a.x, delete a.x;
+  a.startAngle = a.x0, delete a.x0;
+  a.endAngle = a.x1, delete a.x1;
+  a.radius = a.y, delete a.y;
+  a.innerRadius = a.y0, delete a.y0;
+  a.outerRadius = a.y1, delete a.y1;
+  a.lineStartAngle = function() { return lineRadial(x0()); }, delete a.lineX0;
+  a.lineEndAngle = function() { return lineRadial(x1()); }, delete a.lineX1;
+  a.lineInnerRadius = function() { return lineRadial(y0()); }, delete a.lineY0;
+  a.lineOuterRadius = function() { return lineRadial(y1()); }, delete a.lineY1;
+
+  a.curve = function(_) {
+    return arguments.length ? c(curveRadial(_)) : c()._curve;
+  };
+
+  return a;
+}
+
+function pointRadial(x, y) {
+  return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];
+}
+
+var slice$6 = Array.prototype.slice;
+
+function linkSource(d) {
+  return d.source;
+}
+
+function linkTarget(d) {
+  return d.target;
+}
+
+function link$2(curve) {
+  var source = linkSource,
+      target = linkTarget,
+      x$$1 = x$3,
+      y$$1 = y$3,
+      context = null;
+
+  function link() {
+    var buffer, argv = slice$6.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);
+    if (!context) context = buffer = path();
+    curve(context, +x$$1.apply(this, (argv[0] = s, argv)), +y$$1.apply(this, argv), +x$$1.apply(this, (argv[0] = t, argv)), +y$$1.apply(this, argv));
+    if (buffer) return context = null, buffer + "" || null;
+  }
+
+  link.source = function(_) {
+    return arguments.length ? (source = _, link) : source;
+  };
+
+  link.target = function(_) {
+    return arguments.length ? (target = _, link) : target;
+  };
+
+  link.x = function(_) {
+    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$11(+_), link) : x$$1;
+  };
+
+  link.y = function(_) {
+    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$11(+_), link) : y$$1;
+  };
+
+  link.context = function(_) {
+    return arguments.length ? (context = _ == null ? null : _, link) : context;
+  };
+
+  return link;
+}
+
+function curveHorizontal(context, x0, y0, x1, y1) {
+  context.moveTo(x0, y0);
+  context.bezierCurveTo(x0 = (x0 + x1) / 2, y0, x0, y1, x1, y1);
+}
+
+function curveVertical(context, x0, y0, x1, y1) {
+  context.moveTo(x0, y0);
+  context.bezierCurveTo(x0, y0 = (y0 + y1) / 2, x1, y0, x1, y1);
+}
+
+function curveRadial$1(context, x0, y0, x1, y1) {
+  var p0 = pointRadial(x0, y0),
+      p1 = pointRadial(x0, y0 = (y0 + y1) / 2),
+      p2 = pointRadial(x1, y0),
+      p3 = pointRadial(x1, y1);
+  context.moveTo(p0[0], p0[1]);
+  context.bezierCurveTo(p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]);
+}
+
+function linkHorizontal() {
+  return link$2(curveHorizontal);
+}
+
+function linkVertical() {
+  return link$2(curveVertical);
+}
+
+function linkRadial() {
+  var l = link$2(curveRadial$1);
+  l.angle = l.x, delete l.x;
+  l.radius = l.y, delete l.y;
+  return l;
+}
+
+var circle$2 = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / pi$4);
+    context.moveTo(r, 0);
+    context.arc(0, 0, r, 0, tau$4);
+  }
+};
+
+var cross$2 = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / 5) / 2;
+    context.moveTo(-3 * r, -r);
+    context.lineTo(-r, -r);
+    context.lineTo(-r, -3 * r);
+    context.lineTo(r, -3 * r);
+    context.lineTo(r, -r);
+    context.lineTo(3 * r, -r);
+    context.lineTo(3 * r, r);
+    context.lineTo(r, r);
+    context.lineTo(r, 3 * r);
+    context.lineTo(-r, 3 * r);
+    context.lineTo(-r, r);
+    context.lineTo(-3 * r, r);
+    context.closePath();
+  }
+};
+
+var tan30 = Math.sqrt(1 / 3),
+    tan30_2 = tan30 * 2;
+
+var diamond = {
+  draw: function(context, size) {
+    var y = Math.sqrt(size / tan30_2),
+        x = y * tan30;
+    context.moveTo(0, -y);
+    context.lineTo(x, 0);
+    context.lineTo(0, y);
+    context.lineTo(-x, 0);
+    context.closePath();
+  }
+};
+
+var ka = 0.89081309152928522810,
+    kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10),
+    kx = Math.sin(tau$4 / 10) * kr,
+    ky = -Math.cos(tau$4 / 10) * kr;
+
+var star = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size * ka),
+        x = kx * r,
+        y = ky * r;
+    context.moveTo(0, -r);
+    context.lineTo(x, y);
+    for (var i = 1; i < 5; ++i) {
+      var a = tau$4 * i / 5,
+          c = Math.cos(a),
+          s = Math.sin(a);
+      context.lineTo(s * r, -c * r);
+      context.lineTo(c * x - s * y, s * x + c * y);
+    }
+    context.closePath();
+  }
+};
+
+var square = {
+  draw: function(context, size) {
+    var w = Math.sqrt(size),
+        x = -w / 2;
+    context.rect(x, x, w, w);
+  }
+};
+
+var sqrt3 = Math.sqrt(3);
+
+var triangle = {
+  draw: function(context, size) {
+    var y = -Math.sqrt(size / (sqrt3 * 3));
+    context.moveTo(0, y * 2);
+    context.lineTo(-sqrt3 * y, -y);
+    context.lineTo(sqrt3 * y, -y);
+    context.closePath();
+  }
+};
+
+var c$2 = -0.5,
+    s = Math.sqrt(3) / 2,
+    k = 1 / Math.sqrt(12),
+    a = (k / 2 + 1) * 3;
+
+var wye = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / a),
+        x0 = r / 2,
+        y0 = r * k,
+        x1 = x0,
+        y1 = r * k + r,
+        x2 = -x1,
+        y2 = y1;
+    context.moveTo(x0, y0);
+    context.lineTo(x1, y1);
+    context.lineTo(x2, y2);
+    context.lineTo(c$2 * x0 - s * y0, s * x0 + c$2 * y0);
+    context.lineTo(c$2 * x1 - s * y1, s * x1 + c$2 * y1);
+    context.lineTo(c$2 * x2 - s * y2, s * x2 + c$2 * y2);
+    context.lineTo(c$2 * x0 + s * y0, c$2 * y0 - s * x0);
+    context.lineTo(c$2 * x1 + s * y1, c$2 * y1 - s * x1);
+    context.lineTo(c$2 * x2 + s * y2, c$2 * y2 - s * x2);
+    context.closePath();
+  }
+};
+
+var symbols = [
+  circle$2,
+  cross$2,
+  diamond,
+  square,
+  star,
+  triangle,
+  wye
+];
+
+function symbol() {
+  var type = constant$11(circle$2),
+      size = constant$11(64),
+      context = null;
+
+  function symbol() {
+    var buffer;
+    if (!context) context = buffer = path();
+    type.apply(this, arguments).draw(context, +size.apply(this, arguments));
+    if (buffer) return context = null, buffer + "" || null;
+  }
+
+  symbol.type = function(_) {
+    return arguments.length ? (type = typeof _ === "function" ? _ : constant$11(_), symbol) : type;
+  };
+
+  symbol.size = function(_) {
+    return arguments.length ? (size = typeof _ === "function" ? _ : constant$11(+_), symbol) : size;
+  };
+
+  symbol.context = function(_) {
+    return arguments.length ? (context = _ == null ? null : _, symbol) : context;
+  };
+
+  return symbol;
+}
+
+function noop$3() {}
+
+function point$2(that, x, y) {
+  that._context.bezierCurveTo(
+    (2 * that._x0 + that._x1) / 3,
+    (2 * that._y0 + that._y1) / 3,
+    (that._x0 + 2 * that._x1) / 3,
+    (that._y0 + 2 * that._y1) / 3,
+    (that._x0 + 4 * that._x1 + x) / 6,
+    (that._y0 + 4 * that._y1 + y) / 6
+  );
+}
+
+function Basis(context) {
+  this._context = context;
+}
+
+Basis.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 3: point$2(this, this._x1, this._y1); // proceed
+      case 2: this._context.lineTo(this._x1, this._y1); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed
+      default: point$2(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+  }
+};
+
+function basis$2(context) {
+  return new Basis(context);
+}
+
+function BasisClosed(context) {
+  this._context = context;
+}
+
+BasisClosed.prototype = {
+  areaStart: noop$3,
+  areaEnd: noop$3,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x2, this._y2);
+        this._context.closePath();
+        break;
+      }
+      case 2: {
+        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
+        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
+        this._context.closePath();
+        break;
+      }
+      case 3: {
+        this.point(this._x2, this._y2);
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        break;
+      }
+    }
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
+      case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
+      case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
+      default: point$2(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+  }
+};
+
+function basisClosed$1(context) {
+  return new BasisClosed(context);
+}
+
+function BasisOpen(context) {
+  this._context = context;
+}
+
+BasisOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;
+      case 3: this._point = 4; // proceed
+      default: point$2(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+  }
+};
+
+function basisOpen(context) {
+  return new BasisOpen(context);
+}
+
+function Bundle(context, beta) {
+  this._basis = new Basis(context);
+  this._beta = beta;
+}
+
+Bundle.prototype = {
+  lineStart: function() {
+    this._x = [];
+    this._y = [];
+    this._basis.lineStart();
+  },
+  lineEnd: function() {
+    var x = this._x,
+        y = this._y,
+        j = x.length - 1;
+
+    if (j > 0) {
+      var x0 = x[0],
+          y0 = y[0],
+          dx = x[j] - x0,
+          dy = y[j] - y0,
+          i = -1,
+          t;
+
+      while (++i <= j) {
+        t = i / j;
+        this._basis.point(
+          this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
+          this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
+        );
+      }
+    }
+
+    this._x = this._y = null;
+    this._basis.lineEnd();
+  },
+  point: function(x, y) {
+    this._x.push(+x);
+    this._y.push(+y);
+  }
+};
+
+var bundle = (function custom(beta) {
+
+  function bundle(context) {
+    return beta === 1 ? new Basis(context) : new Bundle(context, beta);
+  }
+
+  bundle.beta = function(beta) {
+    return custom(+beta);
+  };
+
+  return bundle;
+})(0.85);
+
+function point$3(that, x, y) {
+  that._context.bezierCurveTo(
+    that._x1 + that._k * (that._x2 - that._x0),
+    that._y1 + that._k * (that._y2 - that._y0),
+    that._x2 + that._k * (that._x1 - x),
+    that._y2 + that._k * (that._y1 - y),
+    that._x2,
+    that._y2
+  );
+}
+
+function Cardinal(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
+
+Cardinal.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x2, this._y2); break;
+      case 3: point$3(this, this._x1, this._y1); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; this._x1 = x, this._y1 = y; break;
+      case 2: this._point = 3; // proceed
+      default: point$3(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var cardinal = (function custom(tension) {
+
+  function cardinal(context) {
+    return new Cardinal(context, tension);
+  }
+
+  cardinal.tension = function(tension) {
+    return custom(+tension);
+  };
+
+  return cardinal;
+})(0);
+
+function CardinalClosed(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
+
+CardinalClosed.prototype = {
+  areaStart: noop$3,
+  areaEnd: noop$3,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 2: {
+        this._context.lineTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 3: {
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        this.point(this._x5, this._y5);
+        break;
+      }
+    }
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
+      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
+      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
+      default: point$3(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var cardinalClosed = (function custom(tension) {
+
+  function cardinal$$1(context) {
+    return new CardinalClosed(context, tension);
+  }
+
+  cardinal$$1.tension = function(tension) {
+    return custom(+tension);
+  };
+
+  return cardinal$$1;
+})(0);
+
+function CardinalOpen(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
+
+CardinalOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
+      case 3: this._point = 4; // proceed
+      default: point$3(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var cardinalOpen = (function custom(tension) {
+
+  function cardinal$$1(context) {
+    return new CardinalOpen(context, tension);
+  }
+
+  cardinal$$1.tension = function(tension) {
+    return custom(+tension);
+  };
+
+  return cardinal$$1;
+})(0);
+
+function point$4(that, x, y) {
+  var x1 = that._x1,
+      y1 = that._y1,
+      x2 = that._x2,
+      y2 = that._y2;
+
+  if (that._l01_a > epsilon$3) {
+    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
+        n = 3 * that._l01_a * (that._l01_a + that._l12_a);
+    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
+    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
+  }
+
+  if (that._l23_a > epsilon$3) {
+    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
+        m = 3 * that._l23_a * (that._l23_a + that._l12_a);
+    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
+    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
+  }
+
+  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
+}
+
+function CatmullRom(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
+
+CatmullRom.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x2, this._y2); break;
+      case 3: this.point(this._x2, this._y2); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+    }
+
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; // proceed
+      default: point$4(this, x, y); break;
+    }
+
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var catmullRom = (function custom(alpha) {
+
+  function catmullRom(context) {
+    return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
+  }
+
+  catmullRom.alpha = function(alpha) {
+    return custom(+alpha);
+  };
+
+  return catmullRom;
+})(0.5);
+
+function CatmullRomClosed(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
+
+CatmullRomClosed.prototype = {
+  areaStart: noop$3,
+  areaEnd: noop$3,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 2: {
+        this._context.lineTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 3: {
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        this.point(this._x5, this._y5);
+        break;
+      }
+    }
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+    }
+
+    switch (this._point) {
+      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
+      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
+      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
+      default: point$4(this, x, y); break;
+    }
+
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var catmullRomClosed = (function custom(alpha) {
+
+  function catmullRom$$1(context) {
+    return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
+  }
+
+  catmullRom$$1.alpha = function(alpha) {
+    return custom(+alpha);
+  };
+
+  return catmullRom$$1;
+})(0.5);
+
+function CatmullRomOpen(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
+
+CatmullRomOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+    }
+
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
+      case 3: this._point = 4; // proceed
+      default: point$4(this, x, y); break;
+    }
+
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var catmullRomOpen = (function custom(alpha) {
+
+  function catmullRom$$1(context) {
+    return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
+  }
+
+  catmullRom$$1.alpha = function(alpha) {
+    return custom(+alpha);
+  };
+
+  return catmullRom$$1;
+})(0.5);
+
+function LinearClosed(context) {
+  this._context = context;
+}
+
+LinearClosed.prototype = {
+  areaStart: noop$3,
+  areaEnd: noop$3,
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._point) this._context.closePath();
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    if (this._point) this._context.lineTo(x, y);
+    else this._point = 1, this._context.moveTo(x, y);
+  }
+};
+
+function linearClosed(context) {
+  return new LinearClosed(context);
+}
+
+function sign$1(x) {
+  return x < 0 ? -1 : 1;
+}
+
+// Calculate the slopes of the tangents (Hermite-type interpolation) based on
+// the following paper: Steffen, M. 1990. A Simple Method for Monotonic
+// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
+// NOV(II), P. 443, 1990.
+function slope3(that, x2, y2) {
+  var h0 = that._x1 - that._x0,
+      h1 = x2 - that._x1,
+      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
+      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
+      p = (s0 * h1 + s1 * h0) / (h0 + h1);
+  return (sign$1(s0) + sign$1(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
+}
+
+// Calculate a one-sided slope.
+function slope2(that, t) {
+  var h = that._x1 - that._x0;
+  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
+}
+
+// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
+// "you can express cubic Hermite interpolation in terms of cubic Bézier curves
+// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
+function point$5(that, t0, t1) {
+  var x0 = that._x0,
+      y0 = that._y0,
+      x1 = that._x1,
+      y1 = that._y1,
+      dx = (x1 - x0) / 3;
+  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
+}
+
+function MonotoneX(context) {
+  this._context = context;
+}
+
+MonotoneX.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 =
+    this._t0 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x1, this._y1); break;
+      case 3: point$5(this, this._t0, slope2(this, this._t0)); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    var t1 = NaN;
+
+    x = +x, y = +y;
+    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; point$5(this, slope2(this, t1 = slope3(this, x, y)), t1); break;
+      default: point$5(this, this._t0, t1 = slope3(this, x, y)); break;
+    }
+
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+    this._t0 = t1;
+  }
+};
+
+function MonotoneY(context) {
+  this._context = new ReflectContext(context);
+}
+
+(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {
+  MonotoneX.prototype.point.call(this, y, x);
+};
+
+function ReflectContext(context) {
+  this._context = context;
+}
+
+ReflectContext.prototype = {
+  moveTo: function(x, y) { this._context.moveTo(y, x); },
+  closePath: function() { this._context.closePath(); },
+  lineTo: function(x, y) { this._context.lineTo(y, x); },
+  bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }
+};
+
+function monotoneX(context) {
+  return new MonotoneX(context);
+}
+
+function monotoneY(context) {
+  return new MonotoneY(context);
+}
+
+function Natural(context) {
+  this._context = context;
+}
+
+Natural.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x = [];
+    this._y = [];
+  },
+  lineEnd: function() {
+    var x = this._x,
+        y = this._y,
+        n = x.length;
+
+    if (n) {
+      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
+      if (n === 2) {
+        this._context.lineTo(x[1], y[1]);
+      } else {
+        var px = controlPoints(x),
+            py = controlPoints(y);
+        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
+          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
+        }
+      }
+    }
+
+    if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+    this._x = this._y = null;
+  },
+  point: function(x, y) {
+    this._x.push(+x);
+    this._y.push(+y);
+  }
+};
+
+// See https://www.particleincell.com/2012/bezier-splines/ for derivation.
+function controlPoints(x) {
+  var i,
+      n = x.length - 1,
+      m,
+      a = new Array(n),
+      b = new Array(n),
+      r = new Array(n);
+  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
+  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
+  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
+  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
+  a[n - 1] = r[n - 1] / b[n - 1];
+  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
+  b[n - 1] = (x[n] + a[n - 1]) / 2;
+  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
+  return [a, b];
+}
+
+function natural(context) {
+  return new Natural(context);
+}
+
+function Step(context, t) {
+  this._context = context;
+  this._t = t;
+}
+
+Step.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x = this._y = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; // proceed
+      default: {
+        if (this._t <= 0) {
+          this._context.lineTo(this._x, y);
+          this._context.lineTo(x, y);
+        } else {
+          var x1 = this._x * (1 - this._t) + x * this._t;
+          this._context.lineTo(x1, this._y);
+          this._context.lineTo(x1, y);
+        }
+        break;
+      }
+    }
+    this._x = x, this._y = y;
+  }
+};
+
+function step(context) {
+  return new Step(context, 0.5);
+}
+
+function stepBefore(context) {
+  return new Step(context, 0);
+}
+
+function stepAfter(context) {
+  return new Step(context, 1);
+}
+
+function none$1(series, order) {
+  if (!((n = series.length) > 1)) return;
+  for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
+    s0 = s1, s1 = series[order[i]];
+    for (j = 0; j < m; ++j) {
+      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
+    }
+  }
+}
+
+function none$2(series) {
+  var n = series.length, o = new Array(n);
+  while (--n >= 0) o[n] = n;
+  return o;
+}
+
+function stackValue(d, key) {
+  return d[key];
+}
+
+function stack() {
+  var keys = constant$11([]),
+      order = none$2,
+      offset = none$1,
+      value = stackValue;
+
+  function stack(data) {
+    var kz = keys.apply(this, arguments),
+        i,
+        m = data.length,
+        n = kz.length,
+        sz = new Array(n),
+        oz;
+
+    for (i = 0; i < n; ++i) {
+      for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
+        si[j] = sij = [0, +value(data[j], ki, j, data)];
+        sij.data = data[j];
+      }
+      si.key = ki;
+    }
+
+    for (i = 0, oz = order(sz); i < n; ++i) {
+      sz[oz[i]].index = i;
+    }
+
+    offset(sz, oz);
+    return sz;
+  }
+
+  stack.keys = function(_) {
+    return arguments.length ? (keys = typeof _ === "function" ? _ : constant$11(slice$6.call(_)), stack) : keys;
+  };
+
+  stack.value = function(_) {
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant$11(+_), stack) : value;
+  };
+
+  stack.order = function(_) {
+    return arguments.length ? (order = _ == null ? none$2 : typeof _ === "function" ? _ : constant$11(slice$6.call(_)), stack) : order;
+  };
+
+  stack.offset = function(_) {
+    return arguments.length ? (offset = _ == null ? none$1 : _, stack) : offset;
+  };
+
+  return stack;
+}
+
+function expand(series, order) {
+  if (!((n = series.length) > 0)) return;
+  for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
+    for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
+    if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
+  }
+  none$1(series, order);
+}
+
+function diverging$1(series, order) {
+  if (!((n = series.length) > 1)) return;
+  for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {
+    for (yp = yn = 0, i = 0; i < n; ++i) {
+      if ((dy = (d = series[order[i]][j])[1] - d[0]) >= 0) {
+        d[0] = yp, d[1] = yp += dy;
+      } else if (dy < 0) {
+        d[1] = yn, d[0] = yn += dy;
+      } else {
+        d[0] = yp;
+      }
+    }
+  }
+}
+
+function silhouette(series, order) {
+  if (!((n = series.length) > 0)) return;
+  for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
+    for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
+    s0[j][1] += s0[j][0] = -y / 2;
+  }
+  none$1(series, order);
+}
+
+function wiggle(series, order) {
+  if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
+  for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
+    for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
+      var si = series[order[i]],
+          sij0 = si[j][1] || 0,
+          sij1 = si[j - 1][1] || 0,
+          s3 = (sij0 - sij1) / 2;
+      for (var k = 0; k < i; ++k) {
+        var sk = series[order[k]],
+            skj0 = sk[j][1] || 0,
+            skj1 = sk[j - 1][1] || 0;
+        s3 += skj0 - skj1;
+      }
+      s1 += sij0, s2 += s3 * sij0;
+    }
+    s0[j - 1][1] += s0[j - 1][0] = y;
+    if (s1) y -= s2 / s1;
+  }
+  s0[j - 1][1] += s0[j - 1][0] = y;
+  none$1(series, order);
+}
+
+function ascending$3(series) {
+  var sums = series.map(sum$2);
+  return none$2(series).sort(function(a, b) { return sums[a] - sums[b]; });
+}
+
+function sum$2(series) {
+  var s = 0, i = -1, n = series.length, v;
+  while (++i < n) if (v = +series[i][1]) s += v;
+  return s;
+}
+
+function descending$2(series) {
+  return ascending$3(series).reverse();
+}
+
+function insideOut(series) {
+  var n = series.length,
+      i,
+      j,
+      sums = series.map(sum$2),
+      order = none$2(series).sort(function(a, b) { return sums[b] - sums[a]; }),
+      top = 0,
+      bottom = 0,
+      tops = [],
+      bottoms = [];
+
+  for (i = 0; i < n; ++i) {
+    j = order[i];
+    if (top < bottom) {
+      top += sums[j];
+      tops.push(j);
+    } else {
+      bottom += sums[j];
+      bottoms.push(j);
+    }
+  }
+
+  return bottoms.reverse().concat(tops);
+}
+
+function reverse(series) {
+  return none$2(series).reverse();
+}
+
+function constant$12(x) {
+  return function() {
+    return x;
+  };
+}
+
+function x$4(d) {
+  return d[0];
+}
+
+function y$4(d) {
+  return d[1];
+}
+
+function RedBlackTree() {
+  this._ = null; // root node
+}
+
+function RedBlackNode(node) {
+  node.U = // parent node
+  node.C = // color - true for red, false for black
+  node.L = // left node
+  node.R = // right node
+  node.P = // previous node
+  node.N = null; // next node
+}
+
+RedBlackTree.prototype = {
+  constructor: RedBlackTree,
+
+  insert: function(after, node) {
+    var parent, grandpa, uncle;
+
+    if (after) {
+      node.P = after;
+      node.N = after.N;
+      if (after.N) after.N.P = node;
+      after.N = node;
+      if (after.R) {
+        after = after.R;
+        while (after.L) after = after.L;
+        after.L = node;
+      } else {
+        after.R = node;
+      }
+      parent = after;
+    } else if (this._) {
+      after = RedBlackFirst(this._);
+      node.P = null;
+      node.N = after;
+      after.P = after.L = node;
+      parent = after;
+    } else {
+      node.P = node.N = null;
+      this._ = node;
+      parent = null;
+    }
+    node.L = node.R = null;
+    node.U = parent;
+    node.C = true;
+
+    after = node;
+    while (parent && parent.C) {
+      grandpa = parent.U;
+      if (parent === grandpa.L) {
+        uncle = grandpa.R;
+        if (uncle && uncle.C) {
+          parent.C = uncle.C = false;
+          grandpa.C = true;
+          after = grandpa;
+        } else {
+          if (after === parent.R) {
+            RedBlackRotateLeft(this, parent);
+            after = parent;
+            parent = after.U;
+          }
+          parent.C = false;
+          grandpa.C = true;
+          RedBlackRotateRight(this, grandpa);
+        }
+      } else {
+        uncle = grandpa.L;
+        if (uncle && uncle.C) {
+          parent.C = uncle.C = false;
+          grandpa.C = true;
+          after = grandpa;
+        } else {
+          if (after === parent.L) {
+            RedBlackRotateRight(this, parent);
+            after = parent;
+            parent = after.U;
+          }
+          parent.C = false;
+          grandpa.C = true;
+          RedBlackRotateLeft(this, grandpa);
+        }
+      }
+      parent = after.U;
+    }
+    this._.C = false;
+  },
+
+  remove: function(node) {
+    if (node.N) node.N.P = node.P;
+    if (node.P) node.P.N = node.N;
+    node.N = node.P = null;
+
+    var parent = node.U,
+        sibling,
+        left = node.L,
+        right = node.R,
+        next,
+        red;
+
+    if (!left) next = right;
+    else if (!right) next = left;
+    else next = RedBlackFirst(right);
+
+    if (parent) {
+      if (parent.L === node) parent.L = next;
+      else parent.R = next;
+    } else {
+      this._ = next;
+    }
+
+    if (left && right) {
+      red = next.C;
+      next.C = node.C;
+      next.L = left;
+      left.U = next;
+      if (next !== right) {
+        parent = next.U;
+        next.U = node.U;
+        node = next.R;
+        parent.L = node;
+        next.R = right;
+        right.U = next;
+      } else {
+        next.U = parent;
+        parent = next;
+        node = next.R;
+      }
+    } else {
+      red = node.C;
+      node = next;
+    }
+
+    if (node) node.U = parent;
+    if (red) return;
+    if (node && node.C) { node.C = false; return; }
+
+    do {
+      if (node === this._) break;
+      if (node === parent.L) {
+        sibling = parent.R;
+        if (sibling.C) {
+          sibling.C = false;
+          parent.C = true;
+          RedBlackRotateLeft(this, parent);
+          sibling = parent.R;
+        }
+        if ((sibling.L && sibling.L.C)
+            || (sibling.R && sibling.R.C)) {
+          if (!sibling.R || !sibling.R.C) {
+            sibling.L.C = false;
+            sibling.C = true;
+            RedBlackRotateRight(this, sibling);
+            sibling = parent.R;
+          }
+          sibling.C = parent.C;
+          parent.C = sibling.R.C = false;
+          RedBlackRotateLeft(this, parent);
+          node = this._;
+          break;
+        }
+      } else {
+        sibling = parent.L;
+        if (sibling.C) {
+          sibling.C = false;
+          parent.C = true;
+          RedBlackRotateRight(this, parent);
+          sibling = parent.L;
+        }
+        if ((sibling.L && sibling.L.C)
+          || (sibling.R && sibling.R.C)) {
+          if (!sibling.L || !sibling.L.C) {
+            sibling.R.C = false;
+            sibling.C = true;
+            RedBlackRotateLeft(this, sibling);
+            sibling = parent.L;
+          }
+          sibling.C = parent.C;
+          parent.C = sibling.L.C = false;
+          RedBlackRotateRight(this, parent);
+          node = this._;
+          break;
+        }
+      }
+      sibling.C = true;
+      node = parent;
+      parent = parent.U;
+    } while (!node.C);
+
+    if (node) node.C = false;
+  }
+};
+
+function RedBlackRotateLeft(tree, node) {
+  var p = node,
+      q = node.R,
+      parent = p.U;
+
+  if (parent) {
+    if (parent.L === p) parent.L = q;
+    else parent.R = q;
+  } else {
+    tree._ = q;
+  }
+
+  q.U = parent;
+  p.U = q;
+  p.R = q.L;
+  if (p.R) p.R.U = p;
+  q.L = p;
+}
+
+function RedBlackRotateRight(tree, node) {
+  var p = node,
+      q = node.L,
+      parent = p.U;
+
+  if (parent) {
+    if (parent.L === p) parent.L = q;
+    else parent.R = q;
+  } else {
+    tree._ = q;
+  }
+
+  q.U = parent;
+  p.U = q;
+  p.L = q.R;
+  if (p.L) p.L.U = p;
+  q.R = p;
+}
+
+function RedBlackFirst(node) {
+  while (node.L) node = node.L;
+  return node;
+}
+
+function createEdge(left, right, v0, v1) {
+  var edge = [null, null],
+      index = edges.push(edge) - 1;
+  edge.left = left;
+  edge.right = right;
+  if (v0) setEdgeEnd(edge, left, right, v0);
+  if (v1) setEdgeEnd(edge, right, left, v1);
+  cells[left.index].halfedges.push(index);
+  cells[right.index].halfedges.push(index);
+  return edge;
+}
+
+function createBorderEdge(left, v0, v1) {
+  var edge = [v0, v1];
+  edge.left = left;
+  return edge;
+}
+
+function setEdgeEnd(edge, left, right, vertex) {
+  if (!edge[0] && !edge[1]) {
+    edge[0] = vertex;
+    edge.left = left;
+    edge.right = right;
+  } else if (edge.left === right) {
+    edge[1] = vertex;
+  } else {
+    edge[0] = vertex;
+  }
+}
+
+// Liang–Barsky line clipping.
+function clipEdge(edge, x0, y0, x1, y1) {
+  var a = edge[0],
+      b = edge[1],
+      ax = a[0],
+      ay = a[1],
+      bx = b[0],
+      by = b[1],
+      t0 = 0,
+      t1 = 1,
+      dx = bx - ax,
+      dy = by - ay,
+      r;
+
+  r = x0 - ax;
+  if (!dx && r > 0) return;
+  r /= dx;
+  if (dx < 0) {
+    if (r < t0) return;
+    if (r < t1) t1 = r;
+  } else if (dx > 0) {
+    if (r > t1) return;
+    if (r > t0) t0 = r;
+  }
+
+  r = x1 - ax;
+  if (!dx && r < 0) return;
+  r /= dx;
+  if (dx < 0) {
+    if (r > t1) return;
+    if (r > t0) t0 = r;
+  } else if (dx > 0) {
+    if (r < t0) return;
+    if (r < t1) t1 = r;
+  }
+
+  r = y0 - ay;
+  if (!dy && r > 0) return;
+  r /= dy;
+  if (dy < 0) {
+    if (r < t0) return;
+    if (r < t1) t1 = r;
+  } else if (dy > 0) {
+    if (r > t1) return;
+    if (r > t0) t0 = r;
+  }
+
+  r = y1 - ay;
+  if (!dy && r < 0) return;
+  r /= dy;
+  if (dy < 0) {
+    if (r > t1) return;
+    if (r > t0) t0 = r;
+  } else if (dy > 0) {
+    if (r < t0) return;
+    if (r < t1) t1 = r;
+  }
+
+  if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check?
+
+  if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy];
+  if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy];
+  return true;
+}
+
+function connectEdge(edge, x0, y0, x1, y1) {
+  var v1 = edge[1];
+  if (v1) return true;
+
+  var v0 = edge[0],
+      left = edge.left,
+      right = edge.right,
+      lx = left[0],
+      ly = left[1],
+      rx = right[0],
+      ry = right[1],
+      fx = (lx + rx) / 2,
+      fy = (ly + ry) / 2,
+      fm,
+      fb;
+
+  if (ry === ly) {
+    if (fx < x0 || fx >= x1) return;
+    if (lx > rx) {
+      if (!v0) v0 = [fx, y0];
+      else if (v0[1] >= y1) return;
+      v1 = [fx, y1];
+    } else {
+      if (!v0) v0 = [fx, y1];
+      else if (v0[1] < y0) return;
+      v1 = [fx, y0];
+    }
+  } else {
+    fm = (lx - rx) / (ry - ly);
+    fb = fy - fm * fx;
+    if (fm < -1 || fm > 1) {
+      if (lx > rx) {
+        if (!v0) v0 = [(y0 - fb) / fm, y0];
+        else if (v0[1] >= y1) return;
+        v1 = [(y1 - fb) / fm, y1];
+      } else {
+        if (!v0) v0 = [(y1 - fb) / fm, y1];
+        else if (v0[1] < y0) return;
+        v1 = [(y0 - fb) / fm, y0];
+      }
+    } else {
+      if (ly < ry) {
+        if (!v0) v0 = [x0, fm * x0 + fb];
+        else if (v0[0] >= x1) return;
+        v1 = [x1, fm * x1 + fb];
+      } else {
+        if (!v0) v0 = [x1, fm * x1 + fb];
+        else if (v0[0] < x0) return;
+        v1 = [x0, fm * x0 + fb];
+      }
+    }
+  }
+
+  edge[0] = v0;
+  edge[1] = v1;
+  return true;
+}
+
+function clipEdges(x0, y0, x1, y1) {
+  var i = edges.length,
+      edge;
+
+  while (i--) {
+    if (!connectEdge(edge = edges[i], x0, y0, x1, y1)
+        || !clipEdge(edge, x0, y0, x1, y1)
+        || !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$4
+            || Math.abs(edge[0][1] - edge[1][1]) > epsilon$4)) {
+      delete edges[i];
+    }
+  }
+}
+
+function createCell(site) {
+  return cells[site.index] = {
+    site: site,
+    halfedges: []
+  };
+}
+
+function cellHalfedgeAngle(cell, edge) {
+  var site = cell.site,
+      va = edge.left,
+      vb = edge.right;
+  if (site === vb) vb = va, va = site;
+  if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]);
+  if (site === va) va = edge[1], vb = edge[0];
+  else va = edge[0], vb = edge[1];
+  return Math.atan2(va[0] - vb[0], vb[1] - va[1]);
+}
+
+function cellHalfedgeStart(cell, edge) {
+  return edge[+(edge.left !== cell.site)];
+}
+
+function cellHalfedgeEnd(cell, edge) {
+  return edge[+(edge.left === cell.site)];
+}
+
+function sortCellHalfedges() {
+  for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) {
+    if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) {
+      var index = new Array(m),
+          array = new Array(m);
+      for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]);
+      index.sort(function(i, j) { return array[j] - array[i]; });
+      for (j = 0; j < m; ++j) array[j] = halfedges[index[j]];
+      for (j = 0; j < m; ++j) halfedges[j] = array[j];
+    }
+  }
+}
+
+function clipCells(x0, y0, x1, y1) {
+  var nCells = cells.length,
+      iCell,
+      cell,
+      site,
+      iHalfedge,
+      halfedges,
+      nHalfedges,
+      start,
+      startX,
+      startY,
+      end,
+      endX,
+      endY,
+      cover = true;
+
+  for (iCell = 0; iCell < nCells; ++iCell) {
+    if (cell = cells[iCell]) {
+      site = cell.site;
+      halfedges = cell.halfedges;
+      iHalfedge = halfedges.length;
+
+      // Remove any dangling clipped edges.
+      while (iHalfedge--) {
+        if (!edges[halfedges[iHalfedge]]) {
+          halfedges.splice(iHalfedge, 1);
+        }
+      }
+
+      // Insert any border edges as necessary.
+      iHalfedge = 0, nHalfedges = halfedges.length;
+      while (iHalfedge < nHalfedges) {
+        end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1];
+        start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1];
+        if (Math.abs(endX - startX) > epsilon$4 || Math.abs(endY - startY) > epsilon$4) {
+          halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end,
+              Math.abs(endX - x0) < epsilon$4 && y1 - endY > epsilon$4 ? [x0, Math.abs(startX - x0) < epsilon$4 ? startY : y1]
+              : Math.abs(endY - y1) < epsilon$4 && x1 - endX > epsilon$4 ? [Math.abs(startY - y1) < epsilon$4 ? startX : x1, y1]
+              : Math.abs(endX - x1) < epsilon$4 && endY - y0 > epsilon$4 ? [x1, Math.abs(startX - x1) < epsilon$4 ? startY : y0]
+              : Math.abs(endY - y0) < epsilon$4 && endX - x0 > epsilon$4 ? [Math.abs(startY - y0) < epsilon$4 ? startX : x0, y0]
+              : null)) - 1);
+          ++nHalfedges;
+        }
+      }
+
+      if (nHalfedges) cover = false;
+    }
+  }
+
+  // If there weren’t any edges, have the closest site cover the extent.
+  // It doesn’t matter which corner of the extent we measure!
+  if (cover) {
+    var dx, dy, d2, dc = Infinity;
+
+    for (iCell = 0, cover = null; iCell < nCells; ++iCell) {
+      if (cell = cells[iCell]) {
+        site = cell.site;
+        dx = site[0] - x0;
+        dy = site[1] - y0;
+        d2 = dx * dx + dy * dy;
+        if (d2 < dc) dc = d2, cover = cell;
+      }
+    }
+
+    if (cover) {
+      var v00 = [x0, y0], v01 = [x0, y1], v11 = [x1, y1], v10 = [x1, y0];
+      cover.halfedges.push(
+        edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1,
+        edges.push(createBorderEdge(site, v01, v11)) - 1,
+        edges.push(createBorderEdge(site, v11, v10)) - 1,
+        edges.push(createBorderEdge(site, v10, v00)) - 1
+      );
+    }
+  }
+
+  // Lastly delete any cells with no edges; these were entirely clipped.
+  for (iCell = 0; iCell < nCells; ++iCell) {
+    if (cell = cells[iCell]) {
+      if (!cell.halfedges.length) {
+        delete cells[iCell];
+      }
+    }
+  }
+}
+
+var circlePool = [];
+
+var firstCircle;
+
+function Circle() {
+  RedBlackNode(this);
+  this.x =
+  this.y =
+  this.arc =
+  this.site =
+  this.cy = null;
+}
+
+function attachCircle(arc) {
+  var lArc = arc.P,
+      rArc = arc.N;
+
+  if (!lArc || !rArc) return;
+
+  var lSite = lArc.site,
+      cSite = arc.site,
+      rSite = rArc.site;
+
+  if (lSite === rSite) return;
+
+  var bx = cSite[0],
+      by = cSite[1],
+      ax = lSite[0] - bx,
+      ay = lSite[1] - by,
+      cx = rSite[0] - bx,
+      cy = rSite[1] - by;
+
+  var d = 2 * (ax * cy - ay * cx);
+  if (d >= -epsilon2$2) return;
+
+  var ha = ax * ax + ay * ay,
+      hc = cx * cx + cy * cy,
+      x = (cy * ha - ay * hc) / d,
+      y = (ax * hc - cx * ha) / d;
+
+  var circle = circlePool.pop() || new Circle;
+  circle.arc = arc;
+  circle.site = cSite;
+  circle.x = x + bx;
+  circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom
+
+  arc.circle = circle;
+
+  var before = null,
+      node = circles._;
+
+  while (node) {
+    if (circle.y < node.y || (circle.y === node.y && circle.x <= node.x)) {
+      if (node.L) node = node.L;
+      else { before = node.P; break; }
+    } else {
+      if (node.R) node = node.R;
+      else { before = node; break; }
+    }
+  }
+
+  circles.insert(before, circle);
+  if (!before) firstCircle = circle;
+}
+
+function detachCircle(arc) {
+  var circle = arc.circle;
+  if (circle) {
+    if (!circle.P) firstCircle = circle.N;
+    circles.remove(circle);
+    circlePool.push(circle);
+    RedBlackNode(circle);
+    arc.circle = null;
+  }
+}
+
+var beachPool = [];
+
+function Beach() {
+  RedBlackNode(this);
+  this.edge =
+  this.site =
+  this.circle = null;
+}
+
+function createBeach(site) {
+  var beach = beachPool.pop() || new Beach;
+  beach.site = site;
+  return beach;
+}
+
+function detachBeach(beach) {
+  detachCircle(beach);
+  beaches.remove(beach);
+  beachPool.push(beach);
+  RedBlackNode(beach);
+}
+
+function removeBeach(beach) {
+  var circle = beach.circle,
+      x = circle.x,
+      y = circle.cy,
+      vertex = [x, y],
+      previous = beach.P,
+      next = beach.N,
+      disappearing = [beach];
+
+  detachBeach(beach);
+
+  var lArc = previous;
+  while (lArc.circle
+      && Math.abs(x - lArc.circle.x) < epsilon$4
+      && Math.abs(y - lArc.circle.cy) < epsilon$4) {
+    previous = lArc.P;
+    disappearing.unshift(lArc);
+    detachBeach(lArc);
+    lArc = previous;
+  }
+
+  disappearing.unshift(lArc);
+  detachCircle(lArc);
+
+  var rArc = next;
+  while (rArc.circle
+      && Math.abs(x - rArc.circle.x) < epsilon$4
+      && Math.abs(y - rArc.circle.cy) < epsilon$4) {
+    next = rArc.N;
+    disappearing.push(rArc);
+    detachBeach(rArc);
+    rArc = next;
+  }
+
+  disappearing.push(rArc);
+  detachCircle(rArc);
+
+  var nArcs = disappearing.length,
+      iArc;
+  for (iArc = 1; iArc < nArcs; ++iArc) {
+    rArc = disappearing[iArc];
+    lArc = disappearing[iArc - 1];
+    setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);
+  }
+
+  lArc = disappearing[0];
+  rArc = disappearing[nArcs - 1];
+  rArc.edge = createEdge(lArc.site, rArc.site, null, vertex);
+
+  attachCircle(lArc);
+  attachCircle(rArc);
+}
+
+function addBeach(site) {
+  var x = site[0],
+      directrix = site[1],
+      lArc,
+      rArc,
+      dxl,
+      dxr,
+      node = beaches._;
+
+  while (node) {
+    dxl = leftBreakPoint(node, directrix) - x;
+    if (dxl > epsilon$4) node = node.L; else {
+      dxr = x - rightBreakPoint(node, directrix);
+      if (dxr > epsilon$4) {
+        if (!node.R) {
+          lArc = node;
+          break;
+        }
+        node = node.R;
+      } else {
+        if (dxl > -epsilon$4) {
+          lArc = node.P;
+          rArc = node;
+        } else if (dxr > -epsilon$4) {
+          lArc = node;
+          rArc = node.N;
+        } else {
+          lArc = rArc = node;
+        }
+        break;
+      }
+    }
+  }
+
+  createCell(site);
+  var newArc = createBeach(site);
+  beaches.insert(lArc, newArc);
+
+  if (!lArc && !rArc) return;
+
+  if (lArc === rArc) {
+    detachCircle(lArc);
+    rArc = createBeach(lArc.site);
+    beaches.insert(newArc, rArc);
+    newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site);
+    attachCircle(lArc);
+    attachCircle(rArc);
+    return;
+  }
+
+  if (!rArc) { // && lArc
+    newArc.edge = createEdge(lArc.site, newArc.site);
+    return;
+  }
+
+  // else lArc !== rArc
+  detachCircle(lArc);
+  detachCircle(rArc);
+
+  var lSite = lArc.site,
+      ax = lSite[0],
+      ay = lSite[1],
+      bx = site[0] - ax,
+      by = site[1] - ay,
+      rSite = rArc.site,
+      cx = rSite[0] - ax,
+      cy = rSite[1] - ay,
+      d = 2 * (bx * cy - by * cx),
+      hb = bx * bx + by * by,
+      hc = cx * cx + cy * cy,
+      vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay];
+
+  setEdgeEnd(rArc.edge, lSite, rSite, vertex);
+  newArc.edge = createEdge(lSite, site, null, vertex);
+  rArc.edge = createEdge(site, rSite, null, vertex);
+  attachCircle(lArc);
+  attachCircle(rArc);
+}
+
+function leftBreakPoint(arc, directrix) {
+  var site = arc.site,
+      rfocx = site[0],
+      rfocy = site[1],
+      pby2 = rfocy - directrix;
+
+  if (!pby2) return rfocx;
+
+  var lArc = arc.P;
+  if (!lArc) return -Infinity;
+
+  site = lArc.site;
+  var lfocx = site[0],
+      lfocy = site[1],
+      plby2 = lfocy - directrix;
+
+  if (!plby2) return lfocx;
+
+  var hl = lfocx - rfocx,
+      aby2 = 1 / pby2 - 1 / plby2,
+      b = hl / plby2;
+
+  if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;
+
+  return (rfocx + lfocx) / 2;
+}
+
+function rightBreakPoint(arc, directrix) {
+  var rArc = arc.N;
+  if (rArc) return leftBreakPoint(rArc, directrix);
+  var site = arc.site;
+  return site[1] === directrix ? site[0] : Infinity;
+}
+
+var epsilon$4 = 1e-6;
+var epsilon2$2 = 1e-12;
+var beaches;
+var cells;
+var circles;
+var edges;
+
+function triangleArea(a, b, c) {
+  return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]);
+}
+
+function lexicographic(a, b) {
+  return b[1] - a[1]
+      || b[0] - a[0];
+}
+
+function Diagram(sites, extent) {
+  var site = sites.sort(lexicographic).pop(),
+      x,
+      y,
+      circle;
+
+  edges = [];
+  cells = new Array(sites.length);
+  beaches = new RedBlackTree;
+  circles = new RedBlackTree;
+
+  while (true) {
+    circle = firstCircle;
+    if (site && (!circle || site[1] < circle.y || (site[1] === circle.y && site[0] < circle.x))) {
+      if (site[0] !== x || site[1] !== y) {
+        addBeach(site);
+        x = site[0], y = site[1];
+      }
+      site = sites.pop();
+    } else if (circle) {
+      removeBeach(circle.arc);
+    } else {
+      break;
+    }
+  }
+
+  sortCellHalfedges();
+
+  if (extent) {
+    var x0 = +extent[0][0],
+        y0 = +extent[0][1],
+        x1 = +extent[1][0],
+        y1 = +extent[1][1];
+    clipEdges(x0, y0, x1, y1);
+    clipCells(x0, y0, x1, y1);
+  }
+
+  this.edges = edges;
+  this.cells = cells;
+
+  beaches =
+  circles =
+  edges =
+  cells = null;
+}
+
+Diagram.prototype = {
+  constructor: Diagram,
+
+  polygons: function() {
+    var edges = this.edges;
+
+    return this.cells.map(function(cell) {
+      var polygon = cell.halfedges.map(function(i) { return cellHalfedgeStart(cell, edges[i]); });
+      polygon.data = cell.site.data;
+      return polygon;
+    });
+  },
+
+  triangles: function() {
+    var triangles = [],
+        edges = this.edges;
+
+    this.cells.forEach(function(cell, i) {
+      if (!(m = (halfedges = cell.halfedges).length)) return;
+      var site = cell.site,
+          halfedges,
+          j = -1,
+          m,
+          s0,
+          e1 = edges[halfedges[m - 1]],
+          s1 = e1.left === site ? e1.right : e1.left;
+
+      while (++j < m) {
+        s0 = s1;
+        e1 = edges[halfedges[j]];
+        s1 = e1.left === site ? e1.right : e1.left;
+        if (s0 && s1 && i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) {
+          triangles.push([site.data, s0.data, s1.data]);
+        }
+      }
+    });
+
+    return triangles;
+  },
+
+  links: function() {
+    return this.edges.filter(function(edge) {
+      return edge.right;
+    }).map(function(edge) {
+      return {
+        source: edge.left.data,
+        target: edge.right.data
+      };
+    });
+  },
+
+  find: function(x, y, radius) {
+    var that = this, i0, i1 = that._found || 0, n = that.cells.length, cell;
+
+    // Use the previously-found cell, or start with an arbitrary one.
+    while (!(cell = that.cells[i1])) if (++i1 >= n) return null;
+    var dx = x - cell.site[0], dy = y - cell.site[1], d2 = dx * dx + dy * dy;
+
+    // Traverse the half-edges to find a closer cell, if any.
+    do {
+      cell = that.cells[i0 = i1], i1 = null;
+      cell.halfedges.forEach(function(e) {
+        var edge = that.edges[e], v = edge.left;
+        if ((v === cell.site || !v) && !(v = edge.right)) return;
+        var vx = x - v[0], vy = y - v[1], v2 = vx * vx + vy * vy;
+        if (v2 < d2) d2 = v2, i1 = v.index;
+      });
+    } while (i1 !== null);
+
+    that._found = i0;
+
+    return radius == null || d2 <= radius * radius ? cell.site : null;
+  }
+};
+
+function voronoi() {
+  var x$$1 = x$4,
+      y$$1 = y$4,
+      extent = null;
+
+  function voronoi(data) {
+    return new Diagram(data.map(function(d, i) {
+      var s = [Math.round(x$$1(d, i, data) / epsilon$4) * epsilon$4, Math.round(y$$1(d, i, data) / epsilon$4) * epsilon$4];
+      s.index = i;
+      s.data = d;
+      return s;
+    }), extent);
+  }
+
+  voronoi.polygons = function(data) {
+    return voronoi(data).polygons();
+  };
+
+  voronoi.links = function(data) {
+    return voronoi(data).links();
+  };
+
+  voronoi.triangles = function(data) {
+    return voronoi(data).triangles();
+  };
+
+  voronoi.x = function(_) {
+    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$12(+_), voronoi) : x$$1;
+  };
+
+  voronoi.y = function(_) {
+    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$12(+_), voronoi) : y$$1;
+  };
+
+  voronoi.extent = function(_) {
+    return arguments.length ? (extent = _ == null ? null : [[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]], voronoi) : extent && [[extent[0][0], extent[0][1]], [extent[1][0], extent[1][1]]];
+  };
+
+  voronoi.size = function(_) {
+    return arguments.length ? (extent = _ == null ? null : [[0, 0], [+_[0], +_[1]]], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]];
+  };
+
+  return voronoi;
+}
+
+function constant$13(x) {
+  return function() {
+    return x;
+  };
+}
+
+function ZoomEvent(target, type, transform) {
+  this.target = target;
+  this.type = type;
+  this.transform = transform;
+}
+
+function Transform(k, x, y) {
+  this.k = k;
+  this.x = x;
+  this.y = y;
+}
+
+Transform.prototype = {
+  constructor: Transform,
+  scale: function(k) {
+    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
+  },
+  translate: function(x, y) {
+    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
+  },
+  apply: function(point) {
+    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
+  },
+  applyX: function(x) {
+    return x * this.k + this.x;
+  },
+  applyY: function(y) {
+    return y * this.k + this.y;
+  },
+  invert: function(location) {
+    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
+  },
+  invertX: function(x) {
+    return (x - this.x) / this.k;
+  },
+  invertY: function(y) {
+    return (y - this.y) / this.k;
+  },
+  rescaleX: function(x) {
+    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
+  },
+  rescaleY: function(y) {
+    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
+  },
+  toString: function() {
+    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+  }
+};
+
+var identity$8 = new Transform(1, 0, 0);
+
+transform$1.prototype = Transform.prototype;
+
+function transform$1(node) {
+  return node.__zoom || identity$8;
+}
+
+function nopropagation$2() {
+  exports.event.stopImmediatePropagation();
+}
+
+function noevent$2() {
+  exports.event.preventDefault();
+  exports.event.stopImmediatePropagation();
+}
+
+// Ignore right-click, since that should open the context menu.
+function defaultFilter$2() {
+  return !exports.event.button;
+}
+
+function defaultExtent$1() {
+  var e = this, w, h;
+  if (e instanceof SVGElement) {
+    e = e.ownerSVGElement || e;
+    w = e.width.baseVal.value;
+    h = e.height.baseVal.value;
+  } else {
+    w = e.clientWidth;
+    h = e.clientHeight;
+  }
+  return [[0, 0], [w, h]];
+}
+
+function defaultTransform() {
+  return this.__zoom || identity$8;
+}
+
+function defaultWheelDelta() {
+  return -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500;
+}
+
+function defaultTouchable$1() {
+  return "ontouchstart" in this;
+}
+
+function defaultConstrain(transform, extent, translateExtent) {
+  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+  return transform.translate(
+    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
+    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
+  );
+}
+
+function zoom() {
+  var filter = defaultFilter$2,
+      extent = defaultExtent$1,
+      constrain = defaultConstrain,
+      wheelDelta = defaultWheelDelta,
+      touchable = defaultTouchable$1,
+      scaleExtent = [0, Infinity],
+      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+      duration = 250,
+      interpolate = interpolateZoom,
+      gestures = [],
+      listeners = dispatch("start", "zoom", "end"),
+      touchstarting,
+      touchending,
+      touchDelay = 500,
+      wheelDelay = 150,
+      clickDistance2 = 0;
+
+  function zoom(selection$$1) {
+    selection$$1
+        .property("__zoom", defaultTransform)
+        .on("wheel.zoom", wheeled)
+        .on("mousedown.zoom", mousedowned)
+        .on("dblclick.zoom", dblclicked)
+      .filter(touchable)
+        .on("touchstart.zoom", touchstarted)
+        .on("touchmove.zoom", touchmoved)
+        .on("touchend.zoom touchcancel.zoom", touchended)
+        .style("touch-action", "none")
+        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+  }
+
+  zoom.transform = function(collection, transform) {
+    var selection$$1 = collection.selection ? collection.selection() : collection;
+    selection$$1.property("__zoom", defaultTransform);
+    if (collection !== selection$$1) {
+      schedule(collection, transform);
+    } else {
+      selection$$1.interrupt().each(function() {
+        gesture(this, arguments)
+            .start()
+            .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
+            .end();
+      });
+    }
+  };
+
+  zoom.scaleBy = function(selection$$1, k) {
+    zoom.scaleTo(selection$$1, function() {
+      var k0 = this.__zoom.k,
+          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+      return k0 * k1;
+    });
+  };
+
+  zoom.scaleTo = function(selection$$1, k) {
+    zoom.transform(selection$$1, function() {
+      var e = extent.apply(this, arguments),
+          t0 = this.__zoom,
+          p0 = centroid(e),
+          p1 = t0.invert(p0),
+          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+    });
+  };
+
+  zoom.translateBy = function(selection$$1, x, y) {
+    zoom.transform(selection$$1, function() {
+      return constrain(this.__zoom.translate(
+        typeof x === "function" ? x.apply(this, arguments) : x,
+        typeof y === "function" ? y.apply(this, arguments) : y
+      ), extent.apply(this, arguments), translateExtent);
+    });
+  };
+
+  zoom.translateTo = function(selection$$1, x, y) {
+    zoom.transform(selection$$1, function() {
+      var e = extent.apply(this, arguments),
+          t = this.__zoom,
+          p = centroid(e);
+      return constrain(identity$8.translate(p[0], p[1]).scale(t.k).translate(
+        typeof x === "function" ? -x.apply(this, arguments) : -x,
+        typeof y === "function" ? -y.apply(this, arguments) : -y
+      ), e, translateExtent);
+    });
+  };
+
+  function scale(transform, k) {
+    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+  }
+
+  function translate(transform, p0, p1) {
+    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
+    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+  }
+
+  function centroid(extent) {
+    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+  }
+
+  function schedule(transition$$1, transform, center) {
+    transition$$1
+        .on("start.zoom", function() { gesture(this, arguments).start(); })
+        .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
+        .tween("zoom", function() {
+          var that = this,
+              args = arguments,
+              g = gesture(that, args),
+              e = extent.apply(that, args),
+              p = center || centroid(e),
+              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+              a = that.__zoom,
+              b = typeof transform === "function" ? transform.apply(that, args) : transform,
+              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+          return function(t) {
+            if (t === 1) t = b; // Avoid rounding error on end.
+            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
+            g.zoom(null, t);
+          };
+        });
+  }
+
+  function gesture(that, args) {
+    for (var i = 0, n = gestures.length, g; i < n; ++i) {
+      if ((g = gestures[i]).that === that) {
+        return g;
+      }
+    }
+    return new Gesture(that, args);
+  }
+
+  function Gesture(that, args) {
+    this.that = that;
+    this.args = args;
+    this.index = -1;
+    this.active = 0;
+    this.extent = extent.apply(that, args);
+  }
+
+  Gesture.prototype = {
+    start: function() {
+      if (++this.active === 1) {
+        this.index = gestures.push(this) - 1;
+        this.emit("start");
+      }
+      return this;
+    },
+    zoom: function(key, transform) {
+      if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+      if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+      if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+      this.that.__zoom = transform;
+      this.emit("zoom");
+      return this;
+    },
+    end: function() {
+      if (--this.active === 0) {
+        gestures.splice(this.index, 1);
+        this.index = -1;
+        this.emit("end");
+      }
+      return this;
+    },
+    emit: function(type) {
+      customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
+    }
+  };
+
+  function wheeled() {
+    if (!filter.apply(this, arguments)) return;
+    var g = gesture(this, arguments),
+        t = this.__zoom,
+        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+        p = mouse(this);
+
+    // If the mouse is in the same location as before, reuse it.
+    // If there were recent wheel events, reset the wheel idle timeout.
+    if (g.wheel) {
+      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+        g.mouse[1] = t.invert(g.mouse[0] = p);
+      }
+      clearTimeout(g.wheel);
+    }
+
+    // If this wheel event won’t trigger a transform change, ignore it.
+    else if (t.k === k) return;
+
+    // Otherwise, capture the mouse point and location at the start.
+    else {
+      g.mouse = [p, t.invert(p)];
+      interrupt(this);
+      g.start();
+    }
+
+    noevent$2();
+    g.wheel = setTimeout(wheelidled, wheelDelay);
+    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+
+    function wheelidled() {
+      g.wheel = null;
+      g.end();
+    }
+  }
+
+  function mousedowned() {
+    if (touchending || !filter.apply(this, arguments)) return;
+    var g = gesture(this, arguments),
+        v = select(exports.event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
+        p = mouse(this),
+        x0 = exports.event.clientX,
+        y0 = exports.event.clientY;
+
+    dragDisable(exports.event.view);
+    nopropagation$2();
+    g.mouse = [p, this.__zoom.invert(p)];
+    interrupt(this);
+    g.start();
+
+    function mousemoved() {
+      noevent$2();
+      if (!g.moved) {
+        var dx = exports.event.clientX - x0, dy = exports.event.clientY - y0;
+        g.moved = dx * dx + dy * dy > clickDistance2;
+      }
+      g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent, translateExtent));
+    }
+
+    function mouseupped() {
+      v.on("mousemove.zoom mouseup.zoom", null);
+      yesdrag(exports.event.view, g.moved);
+      noevent$2();
+      g.end();
+    }
+  }
+
+  function dblclicked() {
+    if (!filter.apply(this, arguments)) return;
+    var t0 = this.__zoom,
+        p0 = mouse(this),
+        p1 = t0.invert(p0),
+        k1 = t0.k * (exports.event.shiftKey ? 0.5 : 2),
+        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments), translateExtent);
+
+    noevent$2();
+    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0);
+    else select(this).call(zoom.transform, t1);
+  }
+
+  function touchstarted() {
+    if (!filter.apply(this, arguments)) return;
+    var g = gesture(this, arguments),
+        touches$$1 = exports.event.changedTouches,
+        started,
+        n = touches$$1.length, i, t, p;
+
+    nopropagation$2();
+    for (i = 0; i < n; ++i) {
+      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
+      p = [p, this.__zoom.invert(p), t.identifier];
+      if (!g.touch0) g.touch0 = p, started = true;
+      else if (!g.touch1) g.touch1 = p;
+    }
+
+    // If this is a dbltap, reroute to the (optional) dblclick.zoom handler.
+    if (touchstarting) {
+      touchstarting = clearTimeout(touchstarting);
+      if (!g.touch1) {
+        g.end();
+        p = select(this).on("dblclick.zoom");
+        if (p) p.apply(this, arguments);
+        return;
+      }
+    }
+
+    if (started) {
+      touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
+      interrupt(this);
+      g.start();
+    }
+  }
+
+  function touchmoved() {
+    var g = gesture(this, arguments),
+        touches$$1 = exports.event.changedTouches,
+        n = touches$$1.length, i, t, p, l;
+
+    noevent$2();
+    if (touchstarting) touchstarting = clearTimeout(touchstarting);
+    for (i = 0; i < n; ++i) {
+      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);
+      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
+      else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
+    }
+    t = g.that.__zoom;
+    if (g.touch1) {
+      var p0 = g.touch0[0], l0 = g.touch0[1],
+          p1 = g.touch1[0], l1 = g.touch1[1],
+          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+      t = scale(t, Math.sqrt(dp / dl));
+      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+    }
+    else if (g.touch0) p = g.touch0[0], l = g.touch0[1];
+    else return;
+    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+  }
+
+  function touchended() {
+    var g = gesture(this, arguments),
+        touches$$1 = exports.event.changedTouches,
+        n = touches$$1.length, i, t;
+
+    nopropagation$2();
+    if (touchending) clearTimeout(touchending);
+    touchending = setTimeout(function() { touchending = null; }, touchDelay);
+    for (i = 0; i < n; ++i) {
+      t = touches$$1[i];
+      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
+      else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
+    }
+    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
+    if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);
+    else g.end();
+  }
+
+  zoom.wheelDelta = function(_) {
+    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$13(+_), zoom) : wheelDelta;
+  };
+
+  zoom.filter = function(_) {
+    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$13(!!_), zoom) : filter;
+  };
+
+  zoom.touchable = function(_) {
+    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$13(!!_), zoom) : touchable;
+  };
+
+  zoom.extent = function(_) {
+    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$13([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+  };
+
+  zoom.scaleExtent = function(_) {
+    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+  };
+
+  zoom.translateExtent = function(_) {
+    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+  };
+
+  zoom.constrain = function(_) {
+    return arguments.length ? (constrain = _, zoom) : constrain;
+  };
+
+  zoom.duration = function(_) {
+    return arguments.length ? (duration = +_, zoom) : duration;
+  };
+
+  zoom.interpolate = function(_) {
+    return arguments.length ? (interpolate = _, zoom) : interpolate;
+  };
+
+  zoom.on = function() {
+    var value = listeners.on.apply(listeners, arguments);
+    return value === listeners ? zoom : value;
+  };
+
+  zoom.clickDistance = function(_) {
+    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+  };
+
+  return zoom;
+}
+
+exports.version = version;
+exports.bisect = bisectRight;
+exports.bisectRight = bisectRight;
+exports.bisectLeft = bisectLeft;
+exports.ascending = ascending;
+exports.bisector = bisector;
+exports.cross = cross;
+exports.descending = descending;
+exports.deviation = deviation;
+exports.extent = extent;
+exports.histogram = histogram;
+exports.thresholdFreedmanDiaconis = freedmanDiaconis;
+exports.thresholdScott = scott;
+exports.thresholdSturges = thresholdSturges;
+exports.max = max;
+exports.mean = mean;
+exports.median = median;
+exports.merge = merge;
+exports.min = min;
+exports.pairs = pairs;
+exports.permute = permute;
+exports.quantile = threshold;
+exports.range = sequence;
+exports.scan = scan;
+exports.shuffle = shuffle;
+exports.sum = sum;
+exports.ticks = ticks;
+exports.tickIncrement = tickIncrement;
+exports.tickStep = tickStep;
+exports.transpose = transpose;
+exports.variance = variance;
+exports.zip = zip;
+exports.axisTop = axisTop;
+exports.axisRight = axisRight;
+exports.axisBottom = axisBottom;
+exports.axisLeft = axisLeft;
+exports.brush = brush;
+exports.brushX = brushX;
+exports.brushY = brushY;
+exports.brushSelection = brushSelection;
+exports.chord = chord;
+exports.ribbon = ribbon;
+exports.nest = nest;
+exports.set = set$2;
+exports.map = map$1;
+exports.keys = keys;
+exports.values = values;
+exports.entries = entries;
+exports.color = color;
+exports.rgb = rgb;
+exports.hsl = hsl;
+exports.lab = lab;
+exports.hcl = hcl;
+exports.lch = lch;
+exports.gray = gray;
+exports.cubehelix = cubehelix;
+exports.contours = contours;
+exports.contourDensity = density;
+exports.dispatch = dispatch;
+exports.drag = drag;
+exports.dragDisable = dragDisable;
+exports.dragEnable = yesdrag;
+exports.dsvFormat = dsvFormat;
+exports.csvParse = csvParse;
+exports.csvParseRows = csvParseRows;
+exports.csvFormat = csvFormat;
+exports.csvFormatRows = csvFormatRows;
+exports.tsvParse = tsvParse;
+exports.tsvParseRows = tsvParseRows;
+exports.tsvFormat = tsvFormat;
+exports.tsvFormatRows = tsvFormatRows;
+exports.easeLinear = linear$1;
+exports.easeQuad = quadInOut;
+exports.easeQuadIn = quadIn;
+exports.easeQuadOut = quadOut;
+exports.easeQuadInOut = quadInOut;
+exports.easeCubic = cubicInOut;
+exports.easeCubicIn = cubicIn;
+exports.easeCubicOut = cubicOut;
+exports.easeCubicInOut = cubicInOut;
+exports.easePoly = polyInOut;
+exports.easePolyIn = polyIn;
+exports.easePolyOut = polyOut;
+exports.easePolyInOut = polyInOut;
+exports.easeSin = sinInOut;
+exports.easeSinIn = sinIn;
+exports.easeSinOut = sinOut;
+exports.easeSinInOut = sinInOut;
+exports.easeExp = expInOut;
+exports.easeExpIn = expIn;
+exports.easeExpOut = expOut;
+exports.easeExpInOut = expInOut;
+exports.easeCircle = circleInOut;
+exports.easeCircleIn = circleIn;
+exports.easeCircleOut = circleOut;
+exports.easeCircleInOut = circleInOut;
+exports.easeBounce = bounceOut;
+exports.easeBounceIn = bounceIn;
+exports.easeBounceOut = bounceOut;
+exports.easeBounceInOut = bounceInOut;
+exports.easeBack = backInOut;
+exports.easeBackIn = backIn;
+exports.easeBackOut = backOut;
+exports.easeBackInOut = backInOut;
+exports.easeElastic = elasticOut;
+exports.easeElasticIn = elasticIn;
+exports.easeElasticOut = elasticOut;
+exports.easeElasticInOut = elasticInOut;
+exports.blob = blob;
+exports.buffer = buffer;
+exports.dsv = dsv;
+exports.csv = csv$1;
+exports.tsv = tsv$1;
+exports.image = image;
+exports.json = json;
+exports.text = text;
+exports.xml = xml;
+exports.html = html;
+exports.svg = svg;
+exports.forceCenter = center$1;
+exports.forceCollide = collide;
+exports.forceLink = link;
+exports.forceManyBody = manyBody;
+exports.forceRadial = radial;
+exports.forceSimulation = simulation;
+exports.forceX = x$2;
+exports.forceY = y$2;
+exports.formatDefaultLocale = defaultLocale;
+exports.formatLocale = formatLocale;
+exports.formatSpecifier = formatSpecifier;
+exports.precisionFixed = precisionFixed;
+exports.precisionPrefix = precisionPrefix;
+exports.precisionRound = precisionRound;
+exports.geoArea = area$1;
+exports.geoBounds = bounds;
+exports.geoCentroid = centroid;
+exports.geoCircle = circle;
+exports.geoClipAntimeridian = clipAntimeridian;
+exports.geoClipCircle = clipCircle;
+exports.geoClipExtent = extent$1;
+exports.geoClipRectangle = clipRectangle;
+exports.geoContains = contains$1;
+exports.geoDistance = distance;
+exports.geoGraticule = graticule;
+exports.geoGraticule10 = graticule10;
+exports.geoInterpolate = interpolate$1;
+exports.geoLength = length$1;
+exports.geoPath = index$1;
+exports.geoAlbers = albers;
+exports.geoAlbersUsa = albersUsa;
+exports.geoAzimuthalEqualArea = azimuthalEqualArea;
+exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
+exports.geoAzimuthalEquidistant = azimuthalEquidistant;
+exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
+exports.geoConicConformal = conicConformal;
+exports.geoConicConformalRaw = conicConformalRaw;
+exports.geoConicEqualArea = conicEqualArea;
+exports.geoConicEqualAreaRaw = conicEqualAreaRaw;
+exports.geoConicEquidistant = conicEquidistant;
+exports.geoConicEquidistantRaw = conicEquidistantRaw;
+exports.geoEquirectangular = equirectangular;
+exports.geoEquirectangularRaw = equirectangularRaw;
+exports.geoGnomonic = gnomonic;
+exports.geoGnomonicRaw = gnomonicRaw;
+exports.geoIdentity = identity$5;
+exports.geoProjection = projection;
+exports.geoProjectionMutator = projectionMutator;
+exports.geoMercator = mercator;
+exports.geoMercatorRaw = mercatorRaw;
+exports.geoNaturalEarth1 = naturalEarth1;
+exports.geoNaturalEarth1Raw = naturalEarth1Raw;
+exports.geoOrthographic = orthographic;
+exports.geoOrthographicRaw = orthographicRaw;
+exports.geoStereographic = stereographic;
+exports.geoStereographicRaw = stereographicRaw;
+exports.geoTransverseMercator = transverseMercator;
+exports.geoTransverseMercatorRaw = transverseMercatorRaw;
+exports.geoRotation = rotation;
+exports.geoStream = geoStream;
+exports.geoTransform = transform;
+exports.cluster = cluster;
+exports.hierarchy = hierarchy;
+exports.pack = index$2;
+exports.packSiblings = siblings;
+exports.packEnclose = enclose;
+exports.partition = partition;
+exports.stratify = stratify;
+exports.tree = tree;
+exports.treemap = index$3;
+exports.treemapBinary = binary;
+exports.treemapDice = treemapDice;
+exports.treemapSlice = treemapSlice;
+exports.treemapSliceDice = sliceDice;
+exports.treemapSquarify = squarify;
+exports.treemapResquarify = resquarify;
+exports.interpolate = interpolateValue;
+exports.interpolateArray = array$1;
+exports.interpolateBasis = basis$1;
+exports.interpolateBasisClosed = basisClosed;
+exports.interpolateDate = date;
+exports.interpolateNumber = reinterpolate;
+exports.interpolateObject = object;
+exports.interpolateRound = interpolateRound;
+exports.interpolateString = interpolateString;
+exports.interpolateTransformCss = interpolateTransformCss;
+exports.interpolateTransformSvg = interpolateTransformSvg;
+exports.interpolateZoom = interpolateZoom;
+exports.interpolateRgb = interpolateRgb;
+exports.interpolateRgbBasis = rgbBasis;
+exports.interpolateRgbBasisClosed = rgbBasisClosed;
+exports.interpolateHsl = hsl$2;
+exports.interpolateHslLong = hslLong;
+exports.interpolateLab = lab$1;
+exports.interpolateHcl = hcl$2;
+exports.interpolateHclLong = hclLong;
+exports.interpolateCubehelix = cubehelix$2;
+exports.interpolateCubehelixLong = cubehelixLong;
+exports.piecewise = piecewise;
+exports.quantize = quantize;
+exports.path = path;
+exports.polygonArea = area$2;
+exports.polygonCentroid = centroid$1;
+exports.polygonHull = hull;
+exports.polygonContains = contains$2;
+exports.polygonLength = length$2;
+exports.quadtree = quadtree;
+exports.randomUniform = uniform;
+exports.randomNormal = normal;
+exports.randomLogNormal = logNormal;
+exports.randomBates = bates;
+exports.randomIrwinHall = irwinHall;
+exports.randomExponential = exponential$1;
+exports.scaleBand = band;
+exports.scalePoint = point$1;
+exports.scaleIdentity = identity$6;
+exports.scaleLinear = linear$2;
+exports.scaleLog = log$1;
+exports.scaleOrdinal = ordinal;
+exports.scaleImplicit = implicit;
+exports.scalePow = pow$1;
+exports.scaleSqrt = sqrt$1;
+exports.scaleQuantile = quantile$$1;
+exports.scaleQuantize = quantize$1;
+exports.scaleThreshold = threshold$1;
+exports.scaleTime = time;
+exports.scaleUtc = utcTime;
+exports.scaleSequential = sequential;
+exports.scaleDiverging = diverging;
+exports.schemeCategory10 = category10;
+exports.schemeAccent = Accent;
+exports.schemeDark2 = Dark2;
+exports.schemePaired = Paired;
+exports.schemePastel1 = Pastel1;
+exports.schemePastel2 = Pastel2;
+exports.schemeSet1 = Set1;
+exports.schemeSet2 = Set2;
+exports.schemeSet3 = Set3;
+exports.interpolateBrBG = BrBG;
+exports.schemeBrBG = scheme;
+exports.interpolatePRGn = PRGn;
+exports.schemePRGn = scheme$1;
+exports.interpolatePiYG = PiYG;
+exports.schemePiYG = scheme$2;
+exports.interpolatePuOr = PuOr;
+exports.schemePuOr = scheme$3;
+exports.interpolateRdBu = RdBu;
+exports.schemeRdBu = scheme$4;
+exports.interpolateRdGy = RdGy;
+exports.schemeRdGy = scheme$5;
+exports.interpolateRdYlBu = RdYlBu;
+exports.schemeRdYlBu = scheme$6;
+exports.interpolateRdYlGn = RdYlGn;
+exports.schemeRdYlGn = scheme$7;
+exports.interpolateSpectral = Spectral;
+exports.schemeSpectral = scheme$8;
+exports.interpolateBuGn = BuGn;
+exports.schemeBuGn = scheme$9;
+exports.interpolateBuPu = BuPu;
+exports.schemeBuPu = scheme$10;
+exports.interpolateGnBu = GnBu;
+exports.schemeGnBu = scheme$11;
+exports.interpolateOrRd = OrRd;
+exports.schemeOrRd = scheme$12;
+exports.interpolatePuBuGn = PuBuGn;
+exports.schemePuBuGn = scheme$13;
+exports.interpolatePuBu = PuBu;
+exports.schemePuBu = scheme$14;
+exports.interpolatePuRd = PuRd;
+exports.schemePuRd = scheme$15;
+exports.interpolateRdPu = RdPu;
+exports.schemeRdPu = scheme$16;
+exports.interpolateYlGnBu = YlGnBu;
+exports.schemeYlGnBu = scheme$17;
+exports.interpolateYlGn = YlGn;
+exports.schemeYlGn = scheme$18;
+exports.interpolateYlOrBr = YlOrBr;
+exports.schemeYlOrBr = scheme$19;
+exports.interpolateYlOrRd = YlOrRd;
+exports.schemeYlOrRd = scheme$20;
+exports.interpolateBlues = Blues;
+exports.schemeBlues = scheme$21;
+exports.interpolateGreens = Greens;
+exports.schemeGreens = scheme$22;
+exports.interpolateGreys = Greys;
+exports.schemeGreys = scheme$23;
+exports.interpolatePurples = Purples;
+exports.schemePurples = scheme$24;
+exports.interpolateReds = Reds;
+exports.schemeReds = scheme$25;
+exports.interpolateOranges = Oranges;
+exports.schemeOranges = scheme$26;
+exports.interpolateCubehelixDefault = cubehelix$3;
+exports.interpolateRainbow = rainbow;
+exports.interpolateWarm = warm;
+exports.interpolateCool = cool;
+exports.interpolateSinebow = sinebow;
+exports.interpolateViridis = viridis;
+exports.interpolateMagma = magma;
+exports.interpolateInferno = inferno;
+exports.interpolatePlasma = plasma;
+exports.create = create;
+exports.creator = creator;
+exports.local = local;
+exports.matcher = matcher$1;
+exports.mouse = mouse;
+exports.namespace = namespace;
+exports.namespaces = namespaces;
+exports.clientPoint = point;
+exports.select = select;
+exports.selectAll = selectAll;
+exports.selection = selection;
+exports.selector = selector;
+exports.selectorAll = selectorAll;
+exports.style = styleValue;
+exports.touch = touch;
+exports.touches = touches;
+exports.window = defaultView;
+exports.customEvent = customEvent;
+exports.arc = arc;
+exports.area = area$3;
+exports.line = line;
+exports.pie = pie;
+exports.areaRadial = areaRadial;
+exports.radialArea = areaRadial;
+exports.lineRadial = lineRadial$1;
+exports.radialLine = lineRadial$1;
+exports.pointRadial = pointRadial;
+exports.linkHorizontal = linkHorizontal;
+exports.linkVertical = linkVertical;
+exports.linkRadial = linkRadial;
+exports.symbol = symbol;
+exports.symbols = symbols;
+exports.symbolCircle = circle$2;
+exports.symbolCross = cross$2;
+exports.symbolDiamond = diamond;
+exports.symbolSquare = square;
+exports.symbolStar = star;
+exports.symbolTriangle = triangle;
+exports.symbolWye = wye;
+exports.curveBasisClosed = basisClosed$1;
+exports.curveBasisOpen = basisOpen;
+exports.curveBasis = basis$2;
+exports.curveBundle = bundle;
+exports.curveCardinalClosed = cardinalClosed;
+exports.curveCardinalOpen = cardinalOpen;
+exports.curveCardinal = cardinal;
+exports.curveCatmullRomClosed = catmullRomClosed;
+exports.curveCatmullRomOpen = catmullRomOpen;
+exports.curveCatmullRom = catmullRom;
+exports.curveLinearClosed = linearClosed;
+exports.curveLinear = curveLinear;
+exports.curveMonotoneX = monotoneX;
+exports.curveMonotoneY = monotoneY;
+exports.curveNatural = natural;
+exports.curveStep = step;
+exports.curveStepAfter = stepAfter;
+exports.curveStepBefore = stepBefore;
+exports.stack = stack;
+exports.stackOffsetExpand = expand;
+exports.stackOffsetDiverging = diverging$1;
+exports.stackOffsetNone = none$1;
+exports.stackOffsetSilhouette = silhouette;
+exports.stackOffsetWiggle = wiggle;
+exports.stackOrderAscending = ascending$3;
+exports.stackOrderDescending = descending$2;
+exports.stackOrderInsideOut = insideOut;
+exports.stackOrderNone = none$2;
+exports.stackOrderReverse = reverse;
+exports.timeInterval = newInterval;
+exports.timeMillisecond = millisecond;
+exports.timeMilliseconds = milliseconds;
+exports.utcMillisecond = millisecond;
+exports.utcMilliseconds = milliseconds;
+exports.timeSecond = second;
+exports.timeSeconds = seconds;
+exports.utcSecond = second;
+exports.utcSeconds = seconds;
+exports.timeMinute = minute;
+exports.timeMinutes = minutes;
+exports.timeHour = hour;
+exports.timeHours = hours;
+exports.timeDay = day;
+exports.timeDays = days;
+exports.timeWeek = sunday;
+exports.timeWeeks = sundays;
+exports.timeSunday = sunday;
+exports.timeSundays = sundays;
+exports.timeMonday = monday;
+exports.timeMondays = mondays;
+exports.timeTuesday = tuesday;
+exports.timeTuesdays = tuesdays;
+exports.timeWednesday = wednesday;
+exports.timeWednesdays = wednesdays;
+exports.timeThursday = thursday;
+exports.timeThursdays = thursdays;
+exports.timeFriday = friday;
+exports.timeFridays = fridays;
+exports.timeSaturday = saturday;
+exports.timeSaturdays = saturdays;
+exports.timeMonth = month;
+exports.timeMonths = months;
+exports.timeYear = year;
+exports.timeYears = years;
+exports.utcMinute = utcMinute;
+exports.utcMinutes = utcMinutes;
+exports.utcHour = utcHour;
+exports.utcHours = utcHours;
+exports.utcDay = utcDay;
+exports.utcDays = utcDays;
+exports.utcWeek = utcSunday;
+exports.utcWeeks = utcSundays;
+exports.utcSunday = utcSunday;
+exports.utcSundays = utcSundays;
+exports.utcMonday = utcMonday;
+exports.utcMondays = utcMondays;
+exports.utcTuesday = utcTuesday;
+exports.utcTuesdays = utcTuesdays;
+exports.utcWednesday = utcWednesday;
+exports.utcWednesdays = utcWednesdays;
+exports.utcThursday = utcThursday;
+exports.utcThursdays = utcThursdays;
+exports.utcFriday = utcFriday;
+exports.utcFridays = utcFridays;
+exports.utcSaturday = utcSaturday;
+exports.utcSaturdays = utcSaturdays;
+exports.utcMonth = utcMonth;
+exports.utcMonths = utcMonths;
+exports.utcYear = utcYear;
+exports.utcYears = utcYears;
+exports.timeFormatDefaultLocale = defaultLocale$1;
+exports.timeFormatLocale = formatLocale$1;
+exports.isoFormat = formatIso;
+exports.isoParse = parseIso;
+exports.now = now;
+exports.timer = timer;
+exports.timerFlush = timerFlush;
+exports.timeout = timeout$1;
+exports.interval = interval$1;
+exports.transition = transition;
+exports.active = active;
+exports.interrupt = interrupt;
+exports.voronoi = voronoi;
+exports.zoom = zoom;
+exports.zoomTransform = transform$1;
+exports.zoomIdentity = identity$8;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
diff --git a/web/static/d3.min.js b/web/static/d3.min.js
new file mode 100644
index 0000000..018c862
--- /dev/null
+++ b/web/static/d3.min.js
@@ -0,0 +1,2 @@
+// https://d3js.org Version 5.5.0. Copyright 2018 Mike Bostock.
+(function(t,n){"object"==typeof exports&&"undefined"!=typeof module?n(exports):"function"==typeof define&&define.amd?define(["exports"],n):n(t.d3=t.d3||{})})(this,function(t){"use strict";function n(t,n){return t<n?-1:t>n?1:t>=n?0:NaN}function e(t){return 1===t.length&&(t=function(t){return function(e,r){return n(t(e),r)}}(t)),{left:function(n,e,r,i){for(null==r&&(r=0),null==i&&(i=n.length);r<i;){var o=r+i>>>1;t(n[o],e)<0?r=o+1:i=o}return r},right:function(n,e,r,i){for(null==r&&(r=0),null==i&&(i=n.length);r<i;){var o=r+i>>>1;t(n[o],e)>0?i=o:r=o+1}return r}}}function r(t,n){return[t,n]}function i(t){return null===t?NaN:+t}function o(t,n){var e,r,o=t.length,a=0,u=-1,f=0,c=0;if(null==n)for(;++u<o;)isNaN(e=i(t[u]))||(c+=(r=e-f)*(e-(f+=r/++a)));else for(;++u<o;)isNaN(e=i(n(t[u],u,t)))||(c+=(r=e-f)*(e-(f+=r/++a)));if(a>1)return c/(a-1)}function a(t,n){var e=o(t,n);return e?Math.sqrt(e):e}function u(t,n){var 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e=Math.sqrt(n/z_),r=e*P_;t.moveTo(0,-e),t.lineTo(r,0),t.lineTo(0,e),t.lineTo(-r,0),t.closePath()}},L_=Math.sin(A_/10)/Math.sin(7*A_/10),D_=Math.sin(N_/10)*L_,U_=-Math.cos(N_/10)*L_,q_={draw:function(t,n){var e=Math.sqrt(.8908130915292852*n),r=D_*e,i=U_*e;t.moveTo(0,-e),t.lineTo(r,i);for(var o=1;o<5;++o){var a=N_*o/5,u=Math.cos(a),f=Math.sin(a);t.lineTo(f*e,-u*e),t.lineTo(u*r-f*i,f*r+u*i)}t.closePath()}},O_={draw:function(t,n){var e=Math.sqrt(n),r=-e/2;t.rect(r,r,e,e)}},Y_=Math.sqrt(3),B_={draw:function(t,n){var e=-Math.sqrt(n/(3*Y_));t.moveTo(0,2*e),t.lineTo(-Y_*e,-e),t.lineTo(Y_*e,-e),t.closePath()}},F_=Math.sqrt(3)/2,I_=1/Math.sqrt(12),j_=3*(I_/2+1),H_={draw:function(t,n){var e=Math.sqrt(n/j_),r=e/2,i=e*I_,o=r,a=e*I_+e,u=-o,f=a;t.moveTo(r,i),t.lineTo(o,a),t.lineTo(u,f),t.lineTo(-.5*r-F_*i,F_*r+-.5*i),t.lineTo(-.5*o-F_*a,F_*o+-.5*a),t.lineTo(-.5*u-F_*f,F_*u+-.5*f),t.lineTo(-.5*r+F_*i,-.5*i-F_*r),t.lineTo(-.5*o+F_*a,-.5*a-F_*o),t.lineTo(-.5*u+F_*f,-.5*f-F_*u),t.closePath()}},X_=[k_,C_,R_,O_,q_,B_,H_];Ff.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){switch(this._point){case 3:Bf(this,this._x1,this._y1);case 2:this._context.lineTo(this._x1,this._y1)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 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2:this._point=3,this._x4=t,this._y4=n,this._context.moveTo((this._x0+4*this._x1+t)/6,(this._y0+4*this._y1+n)/6);break;default:Bf(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},jf.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3;var e=(this._x0+4*this._x1+t)/6,r=(this._y0+4*this._y1+n)/6;this._line?this._context.lineTo(e,r):this._context.moveTo(e,r);break;case 3:this._point=4;default:Bf(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},Hf.prototype={lineStart:function(){this._x=[],this._y=[],this._basis.lineStart()},lineEnd:function(){var t=this._x,n=this._y,e=t.length-1;if(e>0)for(var 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diff --git a/web/static/seepark_web.css b/web/static/seepark_web.css
new file mode 100644
index 0000000..ce8f885
--- /dev/null
+++ b/web/static/seepark_web.css
@@ -0,0 +1,49 @@
+body {
+    margin: 1em !important;
+}
+
+.region-frozen {
+    fill: blue;
+}
+
+.region-ok {
+    fill: white;
+}
+
+.region-warm {
+    fill: orange;
+}
+
+.region-boiling {
+    fill: red;
+}
+
+#openweathermap-widget-15, #windy, .c3 {
+    margin: 0 auto;
+    text-align: center;
+    padding: 1em 1em 0 1em;
+}
+
+#openweathermap-widget-15 {
+    width: 300px;
+    height: 231px;
+}
+
+#windyiframe {
+    max-width: 100%;
+}
+
+#current, #currentair, #currentwater {
+    margin: 0 auto;
+    text-align: center;
+    padding: 1em;
+    max-width: 20em;
+}
+
+#currentair {
+    background-color: lightblue;
+}
+
+#currentwater {
+    background-color: lightgreen;
+}
diff --git a/web/static/seepark_web.js b/web/static/seepark_web.js
new file mode 100644
index 0000000..5aaf55a
--- /dev/null
+++ b/web/static/seepark_web.js
@@ -0,0 +1,255 @@
+var api_base_url_sensors = '/api/1/sensor/type/Wassertemperatur?mode=consolidated&format=c3';
+var api_base_url_weather = '/api/1/openweathermap/city/3319578?mode=consolidated&format=c3';
+var api_url_currentair   = '/api/1/currentairtemperature';
+var api_url_currentwater = '/api/1/currentwatertemperature';
+var refresh_interval     = 5 * 60 * 1000;
+
+function dayschart(element, title, days, xtickformat) {
+	var chartdata;
+	if (element.substr(0, 7) == 'chart_w') {
+		chartdata = {
+				url: api_base_url_sensors + beginend(days),
+				mimeType: 'json',
+				xs: {
+					'0416a1ac66ff': '0416a1ac66ff_x',
+					'0516a207a4ff': '0516a207a4ff_x',
+					'0416a1bab9ff': '0416a1bab9ff_x',
+					'0316a2193bff': '0316a2193bff_x'
+				},
+				names: {
+					'0416a1ac66ff': 'Wassertemperatur 30cm Tiefe',
+					'0516a207a4ff': 'Wassertemperatur 50cm Tiefe',
+					'0416a1bab9ff': 'Wassertemperatur 1m Tiefe',
+					'0316a2193bff': 'Wassertemperatur in 30 cm Tiefe'
+				},
+				xFormat: '%Y-%m-%d %H:%M:%S',
+				// https://en.wikipedia.org/wiki/Web_colors
+				colors: {
+					'0416a1ac66ff': 'lightskyblue',
+					'0516a207a4ff': 'royalblue',
+					'0416a1bab9ff': 'mediumblue',
+					'0316a2193bff': 'midnightblue'
+				},
+				/*
+				xSort: false,
+				order: function (a, b) {
+					// gets 2 x objects. seems to be a "sort function" for js's sort()
+					// -1: a before b etc.
+					// only handle cases that appear in the wild
+					// console.log("a.id", a.id, "b.id", b.id);
+					if (a.id == '0416a1ac66ff') {return -1};
+					if (a.id == '0416a1bab9ff') {return  1};
+				}
+				*/
+		};
+	} else {
+		chartdata = {
+				url: api_base_url_weather + beginend(days),
+				mimeType: 'json',
+				xs: {
+					'3319578': '3319578_x'
+				},
+				names: {
+					'3319578': 'Lufttemperatur in Obsteig'
+				},
+				xFormat: '%Y-%m-%d %H:%M:%S',
+				colors: {
+					'3319578': 'red'
+				}
+		};
+	};
+	var chart = c3.generate({
+		bindto: '#' + element,
+		size: {
+			width: getwidth(element)
+		},
+		onresized: function () {
+			chart.resize({
+				width: getwidth(element)
+			});
+		},
+		transition: {
+			duration: null
+		},
+		title: {
+			text: title
+		},
+		data: chartdata,
+		point: {
+			r: 1.5 // default 2.5
+		},
+		axis: {
+			x: {
+				type: 'timeseries',
+				tick: {
+					format: function (d) {
+						var strftimeDE = strftime.localizeByIdentifier('de_DE');
+						return strftimeDE(xtickformat, new Date(d));
+					},
+					fit: false,
+					multiline: true, // broken? so →
+					rotate: -90
+				}
+			},
+			y: {
+				label: {
+					text: 'Temperatur in °C',
+					position: 'outer-middle'
+				},
+				tick: {
+					format: function (d) {
+						return d.toFixed(1) + '°';
+					}
+				}
+			}
+		},
+		zoom: {
+			enabled: true,
+			/*
+			onzoomend: function (domain) {
+				var duration = (domain[1] - domain[0]) / 1000; // duration is now the diff of the "viewport in seconds"
+				// FIXME?
+				var days = duration / 86400;
+				if (days > 0) {
+					loaddays(this, element, days); // this = chart
+				}
+			}
+			*/
+		},
+		tooltip: {
+			format: {
+				// TODO: maybe move to top
+				name: function (name, ratio, id, index) {
+					var prefix = '';
+					if (element.substr(0, 7) == 'chart_w') {
+						var re = /\d+ ?c?m/;
+						prefix = 'Wasser ';
+					} else {
+						var re = /Luft/;
+					};
+					var result = re.exec(name);
+					return prefix + result;
+				},
+				value: function (value, ratio, id, index) {
+					return value.toFixed(2) + '°';
+				},
+				title: function (datetime) {
+					// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toLocaleString
+					options = {
+						weekday: 'short',
+						year: 'numeric', month: 'numeric', day: 'numeric',
+						hour: 'numeric', minute: 'numeric', second: 'numeric',
+						timeZone: 'Europe/Vienna', timeZoneName: 'short'
+					};
+					return datetime.toLocaleString('de-AT', options);
+				}
+			}
+		},
+		grid: {
+			y: {
+				show: true
+			},
+			x: {
+				show: true
+			}
+		},
+		regions: [
+			{axis: 'y', start: -999, end:   0, class: 'region-frozen'},
+			{axis: 'y', start:    0, end:  25, class: 'region-ok'},
+			{axis: 'y', start:   25, end: 100, class: 'region-warm'},
+			{axis: 'y', start:  100, end: 999, class: 'region-boiling'}
+		]
+	});
+
+	// workaround for unrendered dots
+	setTimeout(function () { chart.flush(); }, 5000);
+
+	// reload data in charts
+	setInterval(
+		function() {
+			loaddays(chart, element, days);
+		},
+		refresh_interval
+	);
+};
+
+function loaddays(chart, element, days) {
+	// TODO: maybe move to top or factor out somehow
+	if (element.substr(0, 7) == 'chart_w') {
+		chart.load({
+			url: api_base_url_sensors + beginend(days),
+			mimeType: 'json',
+			unload: true
+		});
+	} else {
+		chart.load({
+			url: api_base_url_weather + beginend(days),
+			mimeType: 'json',
+			unload: true
+		});
+	};
+	setTimeout(function () { chart.flush(); }, 5000);
+}
+
+function beginend(days) {
+	var now = Date.now();
+
+	// TODO: this timezone calculation relies on the browser being in Europe/Vienna
+	var refdate = new Date(now);
+	var offset = refdate.getTimezoneOffset(); // -120 for UTC+2
+
+	var end = new Date(now - offset * 60 * 1000).toISOString().substr(0, 19); // 2018-06-13T16:52:30.995Z
+	var begin = new Date(now - days * 60*60*24 * 1000 - offset * 60 * 1000).toISOString().substr(0, 19);
+	return '&begin=' + begin + '&end=' + end;
+}
+
+function getwidth(element) {
+	return document.getElementById(element).parentElement.clientWidth * 80 / 100;
+}
+
+dayschart('chart_water_1',   'Der See (Tag)',     1, '%H:%M');
+dayschart('chart_water_7',   'Der See (Woche)',   7, '%a %d');
+dayschart('chart_water_31',  'Der See (Monat)',  31, '%Y-%m-%d');
+dayschart('chart_water_365', 'Der See (Jahr)',  365, '%b %Y');
+
+dayschart('chart_air_1',     'Die Luft (Tag)',     1, '%H:%M');
+dayschart('chart_air_7',     'Die Luft (Woche)',   7, '%a %d');
+dayschart('chart_air_31',    'Die Luft (Monat)',  31, '%Y-%m-%d');
+dayschart('chart_air_365',   'Die Luft (Jahr)',  365, '%b %Y');
+
+// reload current values + owm script
+setInterval(
+	function() {
+		var airvalue   = document.getElementById('currentairvalue');
+		var airtime    = document.getElementById('currentairtime');
+		var watervalue = document.getElementById('currentwatervalue');
+		var watertime  = document.getElementById('currentwatertime');
+		fetch(api_url_currentair)
+			.then((resp) => resp.json())
+			.then(function(data) {
+				airvalue.innerText = data['value'].toFixed(1);
+				airtime.innerText  = strftime('%Y-%m-%d %H:%M', new Date(data['timestamp']));
+			})
+			.catch(function(error) {
+				console.log(error);
+			});
+		fetch(api_url_currentwater)
+			.then((resp) => resp.json())
+			.then(function(data) {
+				watervalue.innerText = data['value'].toFixed(1);
+				watertime.innerText  = strftime('%Y-%m-%d %H:%M', new Date(data['timestamp']));
+			})
+			.catch(function(error) {
+				console.log(error);
+			});
+
+		var owmwidget = document.getElementById('openweathermap-widget-15');
+		owmwidget.removeChild(owmwidget.childNodes[0]);
+		var owmscript = document.head.lastElementChild;
+		document.head.removeChild(owmscript);
+		var newowmscript = document.createElement('script');
+		newowmscript.src = '//openweathermap.org/themes/openweathermap/assets/vendor/owm/js/weather-widget-generator.js';
+		document.head.appendChild(newowmscript);
+	},
+	refresh_interval
+);
diff --git a/web/static/strftime-min.js b/web/static/strftime-min.js
new file mode 100644
index 0000000..91c3c0d
--- /dev/null
+++ b/web/static/strftime-min.js
@@ -0,0 +1,23 @@
+(function(){function q(c,g,n){function i(c,a,e,f){for(var b="",d=null,g=!1,l=c.length,n=!1,j=0;j<l;j++){var m=c.charCodeAt(j);if(g===!0)if(m===45)d="";else if(m===95)d=" ";else if(m===48)d="0";else if(m===58)n&&t("[WARNING] detected use of unsupported %:: or %::: modifiers to strftime"),n=!0;else{switch(m){case 37:b+="%";break;case 65:b+=e.days[a.getDay()];break;case 66:b+=e.months[a.getMonth()];break;case 67:b+=h(Math.floor(a.getFullYear()/100),d);break;case 68:b+=i(e.formats.D,a,e,f);break;case 70:b+=
+i(e.formats.F,a,e,f);break;case 72:b+=h(a.getHours(),d);break;case 73:b+=h(u(a.getHours()),d);break;case 76:b+=Math.floor(f%1E3)>99?Math.floor(f%1E3):Math.floor(f%1E3)>9?"0"+Math.floor(f%1E3):"00"+Math.floor(f%1E3);break;case 77:b+=h(a.getMinutes(),d);break;case 80:b+=a.getHours()<12?e.am:e.pm;break;case 82:b+=i(e.formats.R,a,e,f);break;case 83:b+=h(a.getSeconds(),d);break;case 84:b+=i(e.formats.T,a,e,f);break;case 85:b+=h(v(a,"sunday"),d);break;case 87:b+=h(v(a,"monday"),d);break;case 88:b+=i(e.formats.X,
+a,e,f);break;case 89:b+=a.getFullYear();break;case 90:o&&k===0?b+="GMT":(d=a.toString().match(/\(([\w\s]+)\)/),b+=d&&d[1]||"");break;case 97:b+=e.shortDays[a.getDay()];break;case 98:b+=e.shortMonths[a.getMonth()];break;case 99:b+=i(e.formats.c,a,e,f);break;case 100:b+=h(a.getDate(),d);break;case 101:b+=h(a.getDate(),d==null?" ":d);break;case 104:b+=e.shortMonths[a.getMonth()];break;case 106:d=new Date(a.getFullYear(),0,1);d=Math.ceil((a.getTime()-d.getTime())/864E5);b+=d>99?d:d>9?"0"+d:"00"+d;break;
+case 107:b+=h(a.getHours(),d==null?" ":d);break;case 108:b+=h(u(a.getHours()),d==null?" ":d);break;case 109:b+=h(a.getMonth()+1,d);break;case 110:b+="\n";break;case 111:d=a.getDate();b+=e.ordinalSuffixes?String(d)+(e.ordinalSuffixes[d-1]||w(d)):String(d)+w(d);break;case 112:b+=a.getHours()<12?e.AM:e.PM;break;case 114:b+=i(e.formats.r,a,e,f);break;case 115:b+=Math.floor(f/1E3);break;case 116:b+="\t";break;case 117:d=a.getDay();b+=d===0?7:d;break;case 118:b+=i(e.formats.v,a,e,f);break;case 119:b+=a.getDay();
+break;case 120:b+=i(e.formats.x,a,e,f);break;case 121:b+=(""+a.getFullYear()).slice(2);break;case 122:o&&k===0?b+=n?"+00:00":"+0000":(d=k!==0?k/6E4:-a.getTimezoneOffset(),g=n?":":"",m=Math.abs(d%60),b+=(d<0?"-":"+")+h(Math.floor(Math.abs(d/60)))+g+h(m));break;default:g&&(b+="%"),b+=c[j]}d=null;g=!1}else m===37?g=!0:b+=c[j]}return b}var j=c||x,k=g||0,o=n||!1,p=0,r,l=function(c,a){var e;if(a){if(e=a.getTime(),o){var f=(a.getTimezoneOffset()||0)*6E4,a=new Date(e+f+k);if((a.getTimezoneOffset()||0)*6E4!==
+f)f=(a.getTimezoneOffset()||0)*6E4,a=new Date(e+f+k)}}else e=Date.now(),e>p?(p=e,r=new Date(p),e=p,o&&(r=new Date(p+(r.getTimezoneOffset()||0)*6E4+k))):e=p,a=r;return i(c,a,j,e)};l.localize=function(c){return new q(c||j,k,o)};l.localizeByIdentifier=function(c){var a=y[c];return!a?(t('[WARNING] No locale found with identifier "'+c+'".'),l):l.localize(a)};l.timezone=function(c){var a=k,e=o,f=typeof c;if(f==="number"||f==="string")e=!0,f==="string"?(a=c[0]==="-"?-1:1,f=parseInt(c.slice(1,3),10),c=parseInt(c.slice(3,
+5),10),a=a*(60*f+c)*6E4):f==="number"&&(a=c*6E4);return new q(j,a,e)};l.utc=function(){return new q(j,k,!0)};return l}function h(c,g){if(g===""||c>9)return c;g==null&&(g="0");return g+c}function u(c){if(c===0)return 12;else if(c>12)return c-12;return c}function v(c,g){var g=g||"sunday",h=c.getDay();g==="monday"&&(h===0?h=6:h--);var i=Date.UTC(c.getFullYear(),0,1),j=Date.UTC(c.getFullYear(),c.getMonth(),c.getDate());return Math.floor((Math.floor((j-i)/864E5)+7-h)/7)}function w(c){var g=c%10;c%=100;
+if(c>=11&&c<=13||g===0||g>=4)return"th";switch(g){case 1:return"st";case 2:return"nd";case 3:return"rd"}}function t(c){typeof console!=="undefined"&&typeof console.warn=="function"&&console.warn(c)}var y={de_DE:{days:["Sonntag","Montag","Dienstag","Mittwoch","Donnerstag","Freitag","Samstag"],shortDays:["So","Mo","Di","Mi","Do","Fr","Sa"],months:["Januar","Februar","M\u00e4rz","April","Mai","Juni","Juli","August","September","Oktober","November","Dezember"],shortMonths:["Jan","Feb","M\u00e4r","Apr",
+"Mai","Jun","Jul","Aug","Sep","Okt","Nov","Dez"],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X %Z",D:"%d.%m.%Y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%T",x:"%D"}},en_CA:{days:["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"],shortDays:["Sun","Mon","Tue","Wed","Thu","Fri","Sat"],months:["January","February","March","April","May","June","July","August","September","October","November","December"],shortMonths:["Jan","Feb","Mar","Apr",
+"May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"],ordinalSuffixes:["st","nd","rd","th","th","th","th","th","th","th","th","th","th","th","th","th","th","th","th","th","st","nd","rd","th","th","th","th","th","th","th","st"],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X %Z",D:"%d/%m/%y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%r",x:"%D"}},en_US:{days:["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"],shortDays:["Sun","Mon","Tue","Wed","Thu",
+"Fri","Sat"],months:["January","February","March","April","May","June","July","August","September","October","November","December"],shortMonths:["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"],ordinalSuffixes:["st","nd","rd","th","th","th","th","th","th","th","th","th","th","th","th","th","th","th","th","th","st","nd","rd","th","th","th","th","th","th","th","st"],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X %Z",D:"%m/%d/%y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",
+T:"%H:%M:%S",v:"%e-%b-%Y",X:"%r",x:"%D"}},es_MX:{days:["domingo","lunes","martes","mi\u00e9rcoles","jueves","viernes","s\u00e1bado"],shortDays:["dom","lun","mar","mi\u00e9","jue","vie","s\u00e1b"],months:["enero","febrero","marzo","abril","mayo","junio","julio","agosto","septiembre","octubre","noviembre"," diciembre"],shortMonths:["ene","feb","mar","abr","may","jun","jul","ago","sep","oct","nov","dic"],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X %Z",D:"%d/%m/%Y",F:"%Y-%m-%d",R:"%H:%M",
+r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%T",x:"%D"}},fr_FR:{days:["dimanche","lundi","mardi","mercredi","jeudi","vendredi","samedi"],shortDays:["dim.","lun.","mar.","mer.","jeu.","ven.","sam."],months:["janvier","f\u00e9vrier","mars","avril","mai","juin","juillet","ao\u00fbt","septembre","octobre","novembre","d\u00e9cembre"],shortMonths:["janv.","f\u00e9vr.","mars","avril","mai","juin","juil.","ao\u00fbt","sept.","oct.","nov.","d\u00e9c."],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X %Z",
+D:"%d/%m/%Y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%T",x:"%D"}},it_IT:{days:["domenica","luned\u00ec","marted\u00ec","mercoled\u00ec","gioved\u00ec","venerd\u00ec","sabato"],shortDays:["dom","lun","mar","mer","gio","ven","sab"],months:["gennaio","febbraio","marzo","aprile","maggio","giugno","luglio","agosto","settembre","ottobre","novembre","dicembre"],shortMonths:["pr","mag","giu","lug","ago","set","ott","nov","dic"],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X %Z",
+D:"%d/%m/%Y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%T",x:"%D"}},nl_NL:{days:["zondag","maandag","dinsdag","woensdag","donderdag","vrijdag","zaterdag"],shortDays:["zo","ma","di","wo","do","vr","za"],months:["januari","februari","maart","april","mei","juni","juli","augustus","september","oktober","november","december"],shortMonths:["jan","feb","mrt","apr","mei","jun","jul","aug","sep","okt","nov","dec"],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X %Z",D:"%d-%m-%y",
+F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%T",x:"%D"}},pt_BR:{days:["domingo","segunda","ter\u00e7a","quarta","quinta","sexta","s\u00e1bado"],shortDays:["Dom","Seg","Ter","Qua","Qui","Sex","S\u00e1b"],months:["janeiro","fevereiro","mar\u00e7o","abril","maio","junho","julho","agosto","setembro","outubro","novembro","dezembro"],shortMonths:["Jan","Fev","Mar","Abr","Mai","Jun","Jul","Ago","Set","Out","Nov","Dez"],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X %Z",
+D:"%d-%m-%Y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%T",x:"%D"}},ru_RU:{days:["\u0412\u043e\u0441\u043a\u0440\u0435\u0441\u0435\u043d\u044c\u0435","\u041f\u043e\u043d\u0435\u0434\u0435\u043b\u044c\u043d\u0438\u043a","\u0412\u0442\u043e\u0440\u043d\u0438\u043a","\u0421\u0440\u0435\u0434\u0430","\u0427\u0435\u0442\u0432\u0435\u0440\u0433","\u041f\u044f\u0442\u043d\u0438\u0446\u0430","\u0421\u0443\u0431\u0431\u043e\u0442\u0430"],shortDays:["\u0412\u0441","\u041f\u043d","\u0412\u0442",
+"\u0421\u0440","\u0427\u0442","\u041f\u0442","\u0421\u0431"],months:["\u042f\u043d\u0432\u0430\u0440\u044c","\u0424\u0435\u0432\u0440\u0430\u043b\u044c","\u041c\u0430\u0440\u0442","\u0410\u043f\u0440\u0435\u043b\u044c","\u041c\u0430\u0439","\u0418\u044e\u043d\u044c","\u0418\u044e\u043b\u044c","\u0410\u0432\u0433\u0443\u0441\u0442","\u0421\u0435\u043d\u0442\u044f\u0431\u0440\u044c","\u041e\u043a\u0442\u044f\u0431\u0440\u044c","\u041d\u043e\u044f\u0431\u0440\u044c","\u0414\u0435\u043a\u0430\u0431\u0440\u044c"],
+shortMonths:["\u044f\u043d\u0432","\u0444\u0435\u0432","\u043c\u0430\u0440","\u0430\u043f\u0440","\u043c\u0430\u0439","\u0438\u044e\u043d","\u0438\u044e\u043b","\u0430\u0432\u0433","\u0441\u0435\u043d","\u043e\u043a\u0442","\u043d\u043e\u044f","\u0434\u0435\u043a"],AM:"AM",PM:"PM",am:"am",pm:"pm",formats:{c:"%a %d %b %Y %X",D:"%d.%m.%y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%T",x:"%D"}},tr_TR:{days:["Pazar","Pazartesi","Sal\u0131","\u00c7ar\u015famba","Per\u015fembe",
+"Cuma","Cumartesi"],shortDays:["Paz","Pzt","Sal","\u00c7r\u015f","Pr\u015f","Cum","Cts"],months:["Ocak","\u015eubat","Mart","Nisan","May\u0131s","Haziran","Temmuz","A\u011fustos","Eyl\u00fcl","Ekim","Kas\u0131m","Aral\u0131k"],shortMonths:["Oca","\u015eub","Mar","Nis","May","Haz","Tem","A\u011fu","Eyl","Eki","Kas","Ara"],AM:"\u00d6\u00d6",PM:"\u00d6S",am:"\u00d6\u00d6",pm:"\u00d6S",formats:{c:"%a %d %b %Y %X %Z",D:"%d-%m-%Y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%T",
+x:"%D"}},zh_CN:{days:["\u661f\u671f\u65e5","\u661f\u671f\u4e00","\u661f\u671f\u4e8c","\u661f\u671f\u4e09","\u661f\u671f\u56db","\u661f\u671f\u4e94","\u661f\u671f\u516d"],shortDays:["\u65e5","\u4e00","\u4e8c","\u4e09","\u56db","\u4e94","\u516d"],months:["\u4e00\u6708\u4efd","\u4e8c\u6708\u4efd","\u4e09\u6708\u4efd","\u56db\u6708\u4efd","\u4e94\u6708\u4efd","\u516d\u6708\u4efd","\u4e03\u6708\u4efd","\u516b\u6708\u4efd","\u4e5d\u6708\u4efd","\u5341\u6708\u4efd","\u5341\u4e00\u6708\u4efd","\u5341\u4e8c\u6708\u4efd"],
+shortMonths:["\u4e00\u6708","\u4e8c\u6708","\u4e09\u6708","\u56db\u6708","\u4e94\u6708","\u516d\u6708","\u4e03\u6708","\u516b\u6708","\u4e5d\u6708","\u5341\u6708","\u5341\u4e00\u6708","\u5341\u4e8c\u6708"],AM:"\u4e0a\u5348",PM:"\u4e0b\u5348",am:"\u4e0a\u5348",pm:"\u4e0b\u5348",formats:{c:"%a %d %b %Y %X %Z",D:"%d/%m/%y",F:"%Y-%m-%d",R:"%H:%M",r:"%I:%M:%S %p",T:"%H:%M:%S",v:"%e-%b-%Y",X:"%r",x:"%D"}}},x=y.en_US,z=new q(x,0,!1),s;typeof module!=="undefined"?s=module.exports=z:(s=function(){return this||
+(0,eval)("this")}(),s.strftime=z);if(typeof Date.now!=="function")Date.now=function(){return+new Date}})();
diff --git a/web/static/strftime.js b/web/static/strftime.js
new file mode 100644
index 0000000..34c058f
--- /dev/null
+++ b/web/static/strftime.js
@@ -0,0 +1,818 @@
+//
+// strftime
+// github.com/samsonjs/strftime
+// @_sjs
+//
+// Copyright 2010 - 2016 Sami Samhuri <sami@samhuri.net>
+//
+// MIT License
+// http://sjs.mit-license.org
+//
+
+;(function() {
+
+    var Locales = {
+        de_DE: {
+            days: ['Sonntag', 'Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag'],
+            shortDays: ['So', 'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa'],
+            months: ['Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember'],
+            shortMonths: ['Jan', 'Feb', 'Mär', 'Apr', 'Mai', 'Jun', 'Jul', 'Aug', 'Sep', 'Okt', 'Nov', 'Dez'],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d.%m.%Y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%T',
+                x: '%D'
+            }
+        },
+
+        en_CA: {
+            days: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday' ],
+            shortDays: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
+            months: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
+            shortMonths: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
+            ordinalSuffixes: [
+                'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th', 'th',
+                'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th',
+                'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th', 'th',
+                'st'
+            ],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d/%m/%y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%r',
+                x: '%D'
+            }
+        },
+
+        en_US: {
+            days: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday' ],
+            shortDays: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
+            months: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
+            shortMonths: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
+            ordinalSuffixes: [
+                'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th', 'th',
+                'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th', 'th',
+                'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th', 'th',
+                'st'
+            ],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%m/%d/%y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%r',
+                x: '%D'
+            }
+        },
+
+        es_MX: {
+            days: ['domingo', 'lunes', 'martes', 'miércoles', 'jueves', 'viernes', 'sábado'],
+            shortDays: ['dom', 'lun', 'mar', 'mié', 'jue', 'vie', 'sáb'],
+            months: ['enero', 'febrero', 'marzo', 'abril', 'mayo', 'junio', 'julio', 'agosto', 'septiembre', 'octubre', 'noviembre',' diciembre'],
+            shortMonths: ['ene', 'feb', 'mar', 'abr', 'may', 'jun', 'jul', 'ago', 'sep', 'oct', 'nov', 'dic'],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d/%m/%Y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%T',
+                x: '%D'
+            }
+        },
+
+        fr_FR: {
+            days: ['dimanche', 'lundi', 'mardi', 'mercredi', 'jeudi', 'vendredi', 'samedi'],
+            shortDays: ['dim.', 'lun.', 'mar.', 'mer.', 'jeu.', 'ven.', 'sam.'],
+            months: ['janvier', 'février', 'mars', 'avril', 'mai', 'juin', 'juillet', 'août', 'septembre', 'octobre', 'novembre', 'décembre'],
+            shortMonths: ['janv.', 'févr.', 'mars', 'avril', 'mai', 'juin', 'juil.', 'août', 'sept.', 'oct.', 'nov.', 'déc.'],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d/%m/%Y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%T',
+                x: '%D'
+            }
+        },
+
+        it_IT: {
+            days: ['domenica', 'lunedì', 'martedì', 'mercoledì', 'giovedì', 'venerdì', 'sabato'],
+            shortDays: ['dom', 'lun', 'mar', 'mer', 'gio', 'ven', 'sab'],
+            months: ['gennaio', 'febbraio', 'marzo', 'aprile', 'maggio', 'giugno', 'luglio', 'agosto', 'settembre', 'ottobre', 'novembre', 'dicembre'],
+            shortMonths: ['pr', 'mag', 'giu', 'lug', 'ago', 'set', 'ott', 'nov', 'dic'],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d/%m/%Y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%T',
+                x: '%D'
+            }
+        },
+
+        nl_NL: {
+            days: ['zondag', 'maandag', 'dinsdag', 'woensdag', 'donderdag', 'vrijdag', 'zaterdag'],
+            shortDays: ['zo', 'ma', 'di', 'wo', 'do', 'vr', 'za'],
+            months: ['januari', 'februari', 'maart', 'april', 'mei', 'juni', 'juli', 'augustus', 'september', 'oktober', 'november', 'december'],
+            shortMonths: ['jan', 'feb', 'mrt', 'apr', 'mei', 'jun', 'jul', 'aug', 'sep', 'okt', 'nov', 'dec'],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d-%m-%y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%T',
+                x: '%D'
+            }
+        },
+
+        pt_BR: {
+            days: ['domingo', 'segunda', 'terça', 'quarta', 'quinta', 'sexta', 'sábado'],
+            shortDays: ['Dom', 'Seg', 'Ter', 'Qua', 'Qui', 'Sex', 'Sáb'],
+            months: ['janeiro', 'fevereiro', 'março', 'abril', 'maio', 'junho', 'julho', 'agosto', 'setembro', 'outubro', 'novembro', 'dezembro'],
+            shortMonths: ['Jan', 'Fev', 'Mar', 'Abr', 'Mai', 'Jun', 'Jul', 'Ago', 'Set', 'Out', 'Nov', 'Dez'],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d-%m-%Y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%T',
+                x: '%D'
+            }
+        },
+
+        ru_RU: {
+            days: ['Воскресенье', 'Понедельник', 'Вторник', 'Среда', 'Четверг', 'Пятница', 'Суббота'],
+            shortDays: ['Вс', 'Пн', 'Вт', 'Ср', 'Чт', 'Пт', 'Сб'],
+            months: ['Январь', 'Февраль', 'Март', 'Апрель', 'Май', 'Июнь', 'Июль', 'Август', 'Сентябрь', 'Октябрь', 'Ноябрь', 'Декабрь'],
+            shortMonths: ['янв', 'фев', 'мар', 'апр', 'май', 'июн', 'июл', 'авг', 'сен', 'окт', 'ноя', 'дек'],
+            AM: 'AM',
+            PM: 'PM',
+            am: 'am',
+            pm: 'pm',
+            formats: {
+                c: '%a %d %b %Y %X',
+                D: '%d.%m.%y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%T',
+                x: '%D'
+            }
+        },
+
+        tr_TR: {
+            days: ['Pazar', 'Pazartesi', 'Salı','Çarşamba', 'Perşembe', 'Cuma', 'Cumartesi'],
+            shortDays: ['Paz', 'Pzt', 'Sal', 'Çrş', 'Prş', 'Cum', 'Cts'],
+            months: ['Ocak', 'Şubat', 'Mart', 'Nisan', 'Mayıs', 'Haziran', 'Temmuz', 'Ağustos', 'Eylül', 'Ekim', 'Kasım', 'Aralık'],
+            shortMonths: ['Oca', 'Şub', 'Mar', 'Nis', 'May', 'Haz', 'Tem', 'Ağu', 'Eyl', 'Eki', 'Kas', 'Ara'],
+            AM: 'ÖÖ',
+            PM: 'ÖS',
+            am: 'ÖÖ',
+            pm: 'ÖS',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d-%m-%Y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%T',
+                x: '%D'
+            }
+        },
+
+        // By michaeljayt<michaeljayt@gmail.com>
+        // https://github.com/michaeljayt/strftime/commit/bcb4c12743811d51e568175aa7bff3fd2a77cef3
+        zh_CN: {
+            days: ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'],
+            shortDays: ['日', '一', '二', '三', '四', '五', '六'],
+            months: ['一月份', '二月份', '三月份', '四月份', '五月份', '六月份', '七月份', '八月份', '九月份', '十月份', '十一月份', '十二月份'],
+            shortMonths: ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'],
+            AM: '上午',
+            PM: '下午',
+            am: '上午',
+            pm: '下午',
+            formats: {
+                c: '%a %d %b %Y %X %Z',
+                D: '%d/%m/%y',
+                F: '%Y-%m-%d',
+                R: '%H:%M',
+                r: '%I:%M:%S %p',
+                T: '%H:%M:%S',
+                v: '%e-%b-%Y',
+                X: '%r',
+                x: '%D'
+            }
+        }
+    };
+
+    var DefaultLocale = Locales['en_US'],
+        defaultStrftime = new Strftime(DefaultLocale, 0, false),
+        isCommonJS = typeof module !== 'undefined',
+        namespace;
+
+    // CommonJS / Node module
+    if (isCommonJS) {
+        namespace = module.exports = defaultStrftime;
+    }
+    // Browsers and other environments
+    else {
+        // Get the global object. Works in ES3, ES5, and ES5 strict mode.
+        namespace = (function() { return this || (1,eval)('this'); }());
+        namespace.strftime = defaultStrftime;
+    }
+
+    // Polyfill Date.now for old browsers.
+    if (typeof Date.now !== 'function') {
+        Date.now = function() {
+          return +new Date();
+        };
+    }
+
+    function Strftime(locale, customTimezoneOffset, useUtcTimezone) {
+        var _locale = locale || DefaultLocale,
+            _customTimezoneOffset = customTimezoneOffset || 0,
+            _useUtcBasedDate = useUtcTimezone || false,
+
+            // we store unix timestamp value here to not create new Date() each iteration (each millisecond)
+            // Date.now() is 2 times faster than new Date()
+            // while millisecond precise is enough here
+            // this could be very helpful when strftime triggered a lot of times one by one
+            _cachedDateTimestamp = 0,
+            _cachedDate;
+
+        function _strftime(format, date) {
+            var timestamp;
+
+            if (!date) {
+                var currentTimestamp = Date.now();
+                if (currentTimestamp > _cachedDateTimestamp) {
+                    _cachedDateTimestamp = currentTimestamp;
+                    _cachedDate = new Date(_cachedDateTimestamp);
+
+                    timestamp = _cachedDateTimestamp;
+
+                    if (_useUtcBasedDate) {
+                        // how to avoid duplication of date instantiation for utc here?
+                        // we tied to getTimezoneOffset of the current date
+                        _cachedDate = new Date(_cachedDateTimestamp + getTimestampToUtcOffsetFor(_cachedDate) + _customTimezoneOffset);
+                    }
+                }
+                else {
+                  timestamp = _cachedDateTimestamp;
+                }
+                date = _cachedDate;
+            }
+            else {
+                timestamp = date.getTime();
+
+                if (_useUtcBasedDate) {
+                    var utcOffset = getTimestampToUtcOffsetFor(date);
+                    date = new Date(timestamp + utcOffset + _customTimezoneOffset);
+                    // If we've crossed a DST boundary with this calculation we need to
+                    // adjust the new date accordingly or it will be off by an hour in UTC.
+                    if (getTimestampToUtcOffsetFor(date) !== utcOffset) {
+                        var newUTCOffset = getTimestampToUtcOffsetFor(date);
+                        date = new Date(timestamp + newUTCOffset + _customTimezoneOffset);
+                    }
+                }
+            }
+
+            return _processFormat(format, date, _locale, timestamp);
+        }
+
+        function _processFormat(format, date, locale, timestamp) {
+            var resultString = '',
+                padding = null,
+                isInScope = false,
+                length = format.length,
+                extendedTZ = false;
+
+            for (var i = 0; i < length; i++) {
+
+                var currentCharCode = format.charCodeAt(i);
+
+                if (isInScope === true) {
+                    // '-'
+                    if (currentCharCode === 45) {
+                        padding = '';
+                        continue;
+                    }
+                    // '_'
+                    else if (currentCharCode === 95) {
+                        padding = ' ';
+                        continue;
+                    }
+                    // '0'
+                    else if (currentCharCode === 48) {
+                        padding = '0';
+                        continue;
+                    }
+                    // ':'
+                    else if (currentCharCode === 58) {
+                      if (extendedTZ) {
+                          warn("[WARNING] detected use of unsupported %:: or %::: modifiers to strftime");
+                      }
+                      extendedTZ = true;
+                      continue;
+                    }
+
+                    switch (currentCharCode) {
+
+                        // Examples for new Date(0) in GMT
+
+                        // '%'
+                        // case '%':
+                        case 37:
+                            resultString += '%';
+                            break;
+
+                        // 'Thursday'
+                        // case 'A':
+                        case 65:
+                            resultString += locale.days[date.getDay()];
+                            break;
+
+                        // 'January'
+                        // case 'B':
+                        case 66:
+                            resultString += locale.months[date.getMonth()];
+                            break;
+
+                        // '19'
+                        // case 'C':
+                        case 67:
+                            resultString += padTill2(Math.floor(date.getFullYear() / 100), padding);
+                            break;
+
+                        // '01/01/70'
+                        // case 'D':
+                        case 68:
+                            resultString += _processFormat(locale.formats.D, date, locale, timestamp);
+                            break;
+
+                        // '1970-01-01'
+                        // case 'F':
+                        case 70:
+                            resultString += _processFormat(locale.formats.F, date, locale, timestamp);
+                            break;
+
+                        // '00'
+                        // case 'H':
+                        case 72:
+                            resultString += padTill2(date.getHours(), padding);
+                            break;
+
+                        // '12'
+                        // case 'I':
+                        case 73:
+                            resultString += padTill2(hours12(date.getHours()), padding);
+                            break;
+
+                        // '000'
+                        // case 'L':
+                        case 76:
+                            resultString += padTill3(Math.floor(timestamp % 1000));
+                            break;
+
+                        // '00'
+                        // case 'M':
+                        case 77:
+                            resultString += padTill2(date.getMinutes(), padding);
+                            break;
+
+                        // 'am'
+                        // case 'P':
+                        case 80:
+                            resultString += date.getHours() < 12 ? locale.am : locale.pm;
+                            break;
+
+                        // '00:00'
+                        // case 'R':
+                        case 82:
+                            resultString += _processFormat(locale.formats.R, date, locale, timestamp);
+                            break;
+
+                        // '00'
+                        // case 'S':
+                        case 83:
+                            resultString += padTill2(date.getSeconds(), padding);
+                            break;
+
+                        // '00:00:00'
+                        // case 'T':
+                        case 84:
+                            resultString += _processFormat(locale.formats.T, date, locale, timestamp);
+                            break;
+
+                        // '00'
+                        // case 'U':
+                        case 85:
+                            resultString += padTill2(weekNumber(date, 'sunday'), padding);
+                            break;
+
+                        // '00'
+                        // case 'W':
+                        case 87:
+                            resultString += padTill2(weekNumber(date, 'monday'), padding);
+                            break;
+
+                        // '16:00:00'
+                        // case 'X':
+                        case 88:
+                            resultString += _processFormat(locale.formats.X, date, locale, timestamp);
+                            break;
+
+                        // '1970'
+                        // case 'Y':
+                        case 89:
+                            resultString += date.getFullYear();
+                            break;
+
+                        // 'GMT'
+                        // case 'Z':
+                        case 90:
+                            if (_useUtcBasedDate && _customTimezoneOffset === 0) {
+                                resultString += "GMT";
+                            }
+                            else {
+                                // fixme optimize
+                                var tzString = date.toString().match(/\(([\w\s]+)\)/);
+                                resultString += tzString && tzString[1] || '';
+                            }
+                            break;
+
+                        // 'Thu'
+                        // case 'a':
+                        case 97:
+                            resultString += locale.shortDays[date.getDay()];
+                            break;
+
+                        // 'Jan'
+                        // case 'b':
+                        case 98:
+                            resultString += locale.shortMonths[date.getMonth()];
+                            break;
+
+                        // ''
+                        // case 'c':
+                        case 99:
+                            resultString += _processFormat(locale.formats.c, date, locale, timestamp);
+                            break;
+
+                        // '01'
+                        // case 'd':
+                        case 100:
+                            resultString += padTill2(date.getDate(), padding);
+                            break;
+
+                        // ' 1'
+                        // case 'e':
+                        case 101:
+                            resultString += padTill2(date.getDate(), padding == null ? ' ' : padding);
+                            break;
+
+                        // 'Jan'
+                        // case 'h':
+                        case 104:
+                            resultString += locale.shortMonths[date.getMonth()];
+                            break;
+
+                        // '000'
+                        // case 'j':
+                        case 106:
+                            var y = new Date(date.getFullYear(), 0, 1);
+                            var day = Math.ceil((date.getTime() - y.getTime()) / (1000 * 60 * 60 * 24));
+                            resultString += padTill3(day);
+                            break;
+
+                        // ' 0'
+                        // case 'k':
+                        case 107:
+                            resultString += padTill2(date.getHours(), padding == null ? ' ' : padding);
+                            break;
+
+                        // '12'
+                        // case 'l':
+                        case 108:
+                            resultString += padTill2(hours12(date.getHours()), padding == null ? ' ' : padding);
+                            break;
+
+                        // '01'
+                        // case 'm':
+                        case 109:
+                            resultString += padTill2(date.getMonth() + 1, padding);
+                            break;
+
+                        // '\n'
+                        // case 'n':
+                        case 110:
+                            resultString += '\n';
+                            break;
+
+                        // '1st'
+                        // case 'o':
+                        case 111:
+                            // Try to use an ordinal suffix from the locale, but fall back to using the old
+                            // function for compatibility with old locales that lack them.
+                            var day = date.getDate();
+                            if (locale.ordinalSuffixes) {
+                                resultString += String(day) + (locale.ordinalSuffixes[day - 1] || ordinal(day));
+                            }
+                            else {
+                                resultString += String(day) + ordinal(day);
+                            }
+                            break;
+
+                        // 'AM'
+                        // case 'p':
+                        case 112:
+                            resultString += date.getHours() < 12 ? locale.AM : locale.PM;
+                            break;
+
+                        // '12:00:00 AM'
+                        // case 'r':
+                        case 114:
+                            resultString += _processFormat(locale.formats.r, date, locale, timestamp);
+                            break;
+
+                        // '0'
+                        // case 's':
+                        case 115:
+                            resultString += Math.floor(timestamp / 1000);
+                            break;
+
+                        // '\t'
+                        // case 't':
+                        case 116:
+                            resultString += '\t';
+                            break;
+
+                        // '4'
+                        // case 'u':
+                        case 117:
+                            var day = date.getDay();
+                            resultString += day === 0 ? 7 : day;
+                            break; // 1 - 7, Monday is first day of the week
+
+                        // ' 1-Jan-1970'
+                        // case 'v':
+                        case 118:
+                            resultString += _processFormat(locale.formats.v, date, locale, timestamp);
+                            break;
+
+                        // '4'
+                        // case 'w':
+                        case 119:
+                            resultString += date.getDay();
+                            break; // 0 - 6, Sunday is first day of the week
+
+                        // '12/31/69'
+                        // case 'x':
+                        case 120:
+                            resultString += _processFormat(locale.formats.x, date, locale, timestamp);
+                            break;
+
+                        // '70'
+                        // case 'y':
+                        case 121:
+                            resultString += ('' + date.getFullYear()).slice(2);
+                            break;
+
+                        // '+0000'
+                        // case 'z':
+                        case 122:
+                            if (_useUtcBasedDate && _customTimezoneOffset === 0) {
+                                resultString += extendedTZ ? "+00:00" : "+0000";
+                            }
+                            else {
+                                var off;
+                                if (_customTimezoneOffset !== 0) {
+                                    off = _customTimezoneOffset / (60 * 1000);
+                                }
+                                else {
+                                    off = -date.getTimezoneOffset();
+                                }
+                                var sign = off < 0 ? '-' : '+';
+                                var sep = extendedTZ ? ':' : '';
+                                var hours = Math.floor(Math.abs(off / 60));
+                                var mins = Math.abs(off % 60);
+                                resultString += sign + padTill2(hours) + sep + padTill2(mins);
+                            }
+                            break;
+
+                        default:
+                            if (isInScope) {
+                                resultString += '%';
+                            }
+                            resultString += format[i];
+                            break;
+                    }
+
+                    padding = null;
+                    isInScope = false;
+                    continue;
+                }
+
+                // '%'
+                if (currentCharCode === 37) {
+                    isInScope = true;
+                    continue;
+                }
+
+                resultString += format[i];
+            }
+
+            return resultString;
+        }
+
+        var strftime = _strftime;
+
+        strftime.localize = function(locale) {
+            return new Strftime(locale || _locale, _customTimezoneOffset, _useUtcBasedDate);
+        };
+
+        strftime.localizeByIdentifier = function(localeIdentifier) {
+            var locale = Locales[localeIdentifier];
+            if (!locale) {
+                warn('[WARNING] No locale found with identifier "' + localeIdentifier + '".');
+                return strftime;
+            }
+            return strftime.localize(locale);
+        };
+
+        strftime.timezone = function(timezone) {
+            var customTimezoneOffset = _customTimezoneOffset;
+            var useUtcBasedDate = _useUtcBasedDate;
+
+            var timezoneType = typeof timezone;
+            if (timezoneType === 'number' || timezoneType === 'string') {
+                useUtcBasedDate = true;
+
+                // ISO 8601 format timezone string, [-+]HHMM
+                if (timezoneType === 'string') {
+                    var sign = timezone[0] === '-' ? -1 : 1,
+                        hours = parseInt(timezone.slice(1, 3), 10),
+                        minutes = parseInt(timezone.slice(3, 5), 10);
+
+                    customTimezoneOffset = sign * ((60 * hours) + minutes) * 60 * 1000;
+                    // in minutes: 420
+                }
+                else if (timezoneType === 'number') {
+                    customTimezoneOffset = timezone * 60 * 1000;
+                }
+            }
+
+            return new Strftime(_locale, customTimezoneOffset, useUtcBasedDate);
+        };
+
+        strftime.utc = function() {
+            return new Strftime(_locale, _customTimezoneOffset, true);
+        };
+
+        return strftime;
+    }
+
+    function padTill2(numberToPad, paddingChar) {
+        if (paddingChar === '' || numberToPad > 9) {
+            return numberToPad;
+        }
+        if (paddingChar == null) {
+            paddingChar = '0';
+        }
+        return paddingChar + numberToPad;
+    }
+
+    function padTill3(numberToPad) {
+        if (numberToPad > 99) {
+            return numberToPad;
+        }
+        if (numberToPad > 9) {
+            return '0' + numberToPad;
+        }
+        return '00' + numberToPad;
+    }
+
+    function hours12(hour) {
+        if (hour === 0) {
+            return 12;
+        }
+        else if (hour > 12) {
+            return hour - 12;
+        }
+        return hour;
+    }
+
+    // firstWeekday: 'sunday' or 'monday', default is 'sunday'
+    //
+    // Pilfered & ported from Ruby's strftime implementation.
+    function weekNumber(date, firstWeekday) {
+        firstWeekday = firstWeekday || 'sunday';
+
+        // This works by shifting the weekday back by one day if we
+        // are treating Monday as the first day of the week.
+        var weekday = date.getDay();
+        if (firstWeekday === 'monday') {
+            if (weekday === 0) // Sunday
+                weekday = 6;
+            else
+                weekday--;
+        }
+
+        var firstDayOfYearUtc = Date.UTC(date.getFullYear(), 0, 1),
+            dateUtc = Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()),
+            yday = Math.floor((dateUtc - firstDayOfYearUtc) / 86400000),
+            weekNum = (yday + 7 - weekday) / 7;
+
+        return Math.floor(weekNum);
+    }
+
+    // Get the ordinal suffix for a number: st, nd, rd, or th
+    function ordinal(number) {
+        var i = number % 10;
+        var ii = number % 100;
+
+        if ((ii >= 11 && ii <= 13) || i === 0 || i >= 4) {
+            return 'th';
+        }
+        switch (i) {
+            case 1: return 'st';
+            case 2: return 'nd';
+            case 3: return 'rd';
+        }
+    }
+
+    function getTimestampToUtcOffsetFor(date) {
+        return (date.getTimezoneOffset() || 0) * 60000;
+    }
+
+    function warn(message) {
+        if (typeof console !== 'undefined' && typeof console.warn == 'function') {
+            console.warn(message)
+        }
+    }
+
+}());
diff --git a/web/templates/seepark_web.html b/web/templates/seepark_web.html
new file mode 100644
index 0000000..c6d34d3
--- /dev/null
+++ b/web/templates/seepark_web.html
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<html lang="de">
+	<head>
+		<title>Seepark Obsteig</title>
+
+		<!-- mobile first, yeah -->
+		<meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+		<!-- don't cache; refresh -->
+		<meta http-equiv="Pragma" content="no-cache" />
+		<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
+		<meta http-equiv="Expires" content="0" />
+
+		<!-- Load c3.css -->
+		<link href="{{url_for('static', filename='c3.min.css')}}" rel="stylesheet">
+
+		<!-- Load own css -->
+		<link href="{{url_for('static', filename='seepark_web.css')}}" rel="stylesheet">
+
+		<!-- Load d3.js and c3.js, and strftime.js -->
+		<script src="{{url_for('static', filename='d3.min.js')}}" charset="utf-8"></script>
+		<script src="{{url_for('static', filename='c3.min.js')}}"></script>
+		<script src="{{url_for('static', filename='strftime-min.js')}}"></script>
+
+		<!-- Load owm script -->
+		<script async="true" charset="utf-8" src="//openweathermap.org/themes/openweathermap/assets/vendor/owm/js/weather-widget-generator.js"></script>
+	</head>
+	<body>
+		<h1>Daten zum Seepark Obsteig</h1>
+		<h2>Aktuelle Werte</h2>
+		<div id="current">
+		<p id="currentair">
+			{% if airvalue is none %}
+			<strong>Luft: N/A</strong>
+			{% else %}
+			<strong>Luft: <span id="currentairvalue">{{ airvalue|round(1) }}</span>°C</strong><br />
+			<small>(<span id="currentairtime">{{ airtime.strftime('%Y-%m-%d %H:%M') }}</span>)</small>
+			{% endif %}
+		</p>
+		<p id="currentwater">
+			<strong>Wasser: <span id="currentwatervalue">{{ watervalue|round(1) }}</span>°C</strong><br />
+			<small>(<span id="currentwatertime">{{ watertime.strftime('%Y-%m-%d %H:%M') }}</span>)</small>
+		</p>
+		</div>
+
+		<h2>Der See</h2>
+		<div id="chart_water_1"></div>
+		<div id="chart_water_7"></div>
+		<div id="chart_water_31"></div>
+		<div id="chart_water_365"></div>
+
+		<h2>Die Luft</h2>
+		<div id="chart_air_1"></div>
+		<div id="chart_air_7"></div>
+		<div id="chart_air_31"></div>
+		<div id="chart_air_365"></div>
+
+		<!-- openweathermap widget -->
+		<div id="openweathermap-widget-15"></div>
+		<script>
+		window.myWidgetParam ? window.myWidgetParam : window.myWidgetParam = [];
+		window.myWidgetParam.push({
+			id: 15,
+			cityid: '3319578',
+			appid: '{{ apikey }}',
+			units: 'metric',
+			containerid: 'openweathermap-widget-15',
+			lang: 'de',
+		});
+		</script>
+
+		<!-- windy widget -->
+		<div id="windy">
+		<iframe id="windyiframe" width="650" height="450" src="https://embed.windy.com/embed2.html?lat=47.297&amp;lon=10.927&amp;zoom=10&amp;level=surface&amp;overlay=rain&amp;menu=&amp;message=&amp;marker=&amp;calendar=&amp;pressure=&amp;type=map&amp;location=coordinates&amp;detail=&amp;detailLat=48.200&amp;detailLon=16.350&amp;metricWind=default&amp;metricTemp=default&amp;radarRange=-1" frameborder="0"></iframe> 
+		</div>
+
+		<hr />
+		<p><small><a href="https://git.toastfreeware.priv.at/chrisu/seepark.git">Source code</a></small></p>
+
+		<!-- Load own javascript code -->
+		<script src="{{url_for('static', filename='seepark_web.js')}}"></script>
+
+	</body>
+</html>