From: gregor herrmann <gregoa@debian.org>
Date: Sun, 5 Aug 2018 18:57:51 +0000 (+0200)
Subject: partially merge web branch into master
X-Git-Url: https://git.toastfreeware.priv.at/chrisu/seepark.git/commitdiff_plain/d53365e0ec5dde2c51d94fbd3c5cc91a7c2f350d?hp=9b244f27947be8e1437d2ab4fdff4a1168497921

partially merge web branch into master

this merges everything except the webapp in the web/ directory

i.e.
- .gitignore update
- seewasser.py: small fix
- add owm.py
- add seeparklib
---

diff --git a/web/README b/web/README
deleted file mode 100644
index e377dbd..0000000
--- a/web/README
+++ /dev/null
@@ -1,14 +0,0 @@
-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
-
-Go to:
-http://127.0.0.1:5000/
-or http://<ipaddress>:5000/
-if the app is running on a different machine
diff --git a/web/seepark_web.py b/web/seepark_web.py
deleted file mode 100644
index 523e52d..0000000
--- a/web/seepark_web.py
+++ /dev/null
@@ -1,253 +0,0 @@
-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
-
-
-app_path = os.path.dirname(os.path.realpath(__file__))
-lib_path = os.path.join(app_path, '..')
-sys.path.append(lib_path)
-from seeparklib.openweathermap import openweathermap_json, OpenWeatherMapError
-
-
-# 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('temperature', '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 select_sensordata(sensor_id, sensor_type, begin, end, mode):
-    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)
-    if mode == 'consolidated' and begin is not None and end is not None:
-        # copied from munin/master/_bin/munin-cgi-graph.in
-        # interval in seconds for data points
-        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']
-        # TODO: filter out samples from 'result'
-        # something like 
-        # 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;
-    return query.all()
-
-
-def select_openweatherdata(cityid, begin, end, mode):
-    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)
-    if mode == 'consolidated' and begin is not None and end is not None:
-        # copied from munin/master/_bin/munin-cgi-graph.in
-        # interval in seconds for data points
-        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']
-        # TODO: filter out samples from 'result'
-        # something like 
-        # 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;
-    return query.all()
-
-
-def convert_to_c3(result, id, field_x, field_y):
-    c3result = defaultdict(list)
-    for row in result:
-        c3result[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')
-
-    result = select_sensordata(sensor_id, sensor_type, begin, end, mode)
-
-    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')
-
-    result = select_openweatherdata(cityid, begin, end, mode)
-
-    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("/")
-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
deleted file mode 100644
index cb1ae32..0000000
--- a/web/static/c3.css
+++ /dev/null
@@ -1,178 +0,0 @@
-/*-- Chart --*/
-.c3 svg {
-  font: 10px sans-serif;
-  -webkit-tap-highlight-color: transparent; }
-
-.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: .1; }
-
-/*-- Brush --*/
-.c3-brush .extent {
-  fill-opacity: .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; }
diff --git a/web/static/c3.js b/web/static/c3.js
deleted file mode 100644
index ff42e0f..0000000
--- a/web/static/c3.js
+++ /dev/null
@@ -1,9206 +0,0 @@
-/* @license C3.js v0.6.1 | (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';
-
-    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',
-        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',
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-        ygrid: 'c3-ygrid',
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-        axisY: 'c3-axis-y',
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-        axisY2: 'c3-axis-y2',
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-        dragarea: 'c3-dragarea',
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-            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 c3_axis_fn;
-    var c3_axis_internal_fn;
-
-    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();
-    }
-    c3_axis_internal_fn = AxisInternal.prototype;
-
-    c3_axis_internal_fn.axisX = function (selection, x, tickOffset) {
-        selection.attr("transform", function (d) {
-            return "translate(" + Math.ceil(x(d) + tickOffset) + ", 0)";
-        });
-    };
-    c3_axis_internal_fn.axisY = function (selection, y) {
-        selection.attr("transform", function (d) {
-            return "translate(0," + Math.ceil(y(d)) + ")";
-        });
-    };
-    c3_axis_internal_fn.scaleExtent = function (domain) {
-        var start = domain[0],
-            stop = domain[domain.length - 1];
-        return start < stop ? [start, stop] : [stop, start];
-    };
-    c3_axis_internal_fn.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;
-    };
-    c3_axis_internal_fn.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;
-    };
-    c3_axis_internal_fn.textFormatted = function (v) {
-        var internal = this,
-            formatted = internal.tickFormat ? internal.tickFormat(v) : v;
-        return typeof formatted !== 'undefined' ? formatted : '';
-    };
-    c3_axis_internal_fn.updateRange = function () {
-        var internal = this;
-        internal.range = internal.scale.rangeExtent ? internal.scale.rangeExtent() : internal.scaleExtent(internal.scale.range());
-        return internal.range;
-    };
-    c3_axis_internal_fn.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;
-    };
-    c3_axis_internal_fn.isVertical = function () {
-        return this.orient === 'left' || this.orient === 'right';
-    };
-    c3_axis_internal_fn.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 };
-        });
-    };
-    c3_axis_internal_fn.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 + "");
-    };
-    c3_axis_internal_fn.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;
-    };
-    c3_axis_internal_fn.updateTickLength = function () {
-        var internal = this;
-        internal.tickLength = Math.max(internal.innerTickSize, 0) + internal.tickPadding;
-    };
-    c3_axis_internal_fn.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;
-    };
-    c3_axis_internal_fn.textY = function () {
-        var internal = this,
-            rotate = internal.tickTextRotate;
-        return rotate ? 11.5 - 2.5 * (rotate / 15) * (rotate > 0 ? 1 : -1) : internal.tickLength;
-    };
-    c3_axis_internal_fn.textTransform = function () {
-        var internal = this,
-            rotate = internal.tickTextRotate;
-        return rotate ? "rotate(" + rotate + ")" : "";
-    };
-    c3_axis_internal_fn.textTextAnchor = function () {
-        var internal = this,
-            rotate = internal.tickTextRotate;
-        return rotate ? rotate > 0 ? "start" : "end" : "middle";
-    };
-    c3_axis_internal_fn.tspanDx = function () {
-        var internal = this,
-            rotate = internal.tickTextRotate;
-        return rotate ? 8 * Math.sin(Math.PI * (rotate / 180)) : 0;
-    };
-    c3_axis_internal_fn.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;
-    };
-
-    c3_axis_internal_fn.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 Axis = function (_Component) {
-        inherits(Axis, _Component);
-
-        function Axis(owner) {
-            classCallCheck(this, Axis);
-
-            var fn = {
-                fn: c3_axis_fn,
-                internal: {
-                    fn: c3_axis_internal_fn
-                }
-            };
-
-            var _this = possibleConstructorReturn(this, (Axis.__proto__ || Object.getPrototypeOf(Axis)).call(this, owner, 'axis', fn));
-
-            _this.d3 = owner.d3;
-            _this.internal = AxisInternal;
-            return _this;
-        }
-
-        return Axis;
-    }(Component);
-
-    c3_axis_fn = Axis.prototype;
-
-    c3_axis_fn.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));
-    };
-    c3_axis_fn.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;
-    };
-    c3_axis_fn.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;
-    };
-    c3_axis_fn.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 ($$.isTimeSeriesY()) {
-            axis.ticks(config.axis_y_tick_time_type, config.axis_y_tick_time_interval);
-        } else {
-            axis.tickValues(tickValues);
-        }
-        return axis;
-    };
-    c3_axis_fn.getId = function getId(id) {
-        var config = this.owner.config;
-        return id in config.data_axes ? config.data_axes[id] : 'y';
-    };
-    c3_axis_fn.getXAxisTickFormat = function getXAxisTickFormat() {
-        // #2251 previously set any negative values to a whole number,
-        // however both should be truncated according to the users format specification
-        var $$ = 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;
-    };
-    c3_axis_fn.getTickValues = function getTickValues(tickValues, axis) {
-        return tickValues ? tickValues : axis ? axis.tickValues() : undefined;
-    };
-    c3_axis_fn.getXAxisTickValues = function getXAxisTickValues() {
-        return this.getTickValues(this.owner.config.axis_x_tick_values, this.owner.xAxis);
-    };
-    c3_axis_fn.getYAxisTickValues = function getYAxisTickValues() {
-        return this.getTickValues(this.owner.config.axis_y_tick_values, this.owner.yAxis);
-    };
-    c3_axis_fn.getY2AxisTickValues = function getY2AxisTickValues() {
-        return this.getTickValues(this.owner.config.axis_y2_tick_values, this.owner.y2Axis);
-    };
-    c3_axis_fn.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;
-    };
-    c3_axis_fn.getLabelText = function getLabelText(axisId) {
-        var option = this.getLabelOptionByAxisId(axisId);
-        return isString(option) ? option : option ? option.text : null;
-    };
-    c3_axis_fn.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;
-        }
-    };
-    c3_axis_fn.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
-        };
-    };
-    c3_axis_fn.getXAxisLabelPosition = function getXAxisLabelPosition() {
-        return this.getLabelPosition('x', this.owner.config.axis_rotated ? 'inner-top' : 'inner-right');
-    };
-    c3_axis_fn.getYAxisLabelPosition = function getYAxisLabelPosition() {
-        return this.getLabelPosition('y', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
-    };
-    c3_axis_fn.getY2AxisLabelPosition = function getY2AxisLabelPosition() {
-        return this.getLabelPosition('y2', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
-    };
-    c3_axis_fn.getLabelPositionById = function getLabelPositionById(id) {
-        return id === 'y2' ? this.getY2AxisLabelPosition() : id === 'y' ? this.getYAxisLabelPosition() : this.getXAxisLabelPosition();
-    };
-    c3_axis_fn.textForXAxisLabel = function textForXAxisLabel() {
-        return this.getLabelText('x');
-    };
-    c3_axis_fn.textForYAxisLabel = function textForYAxisLabel() {
-        return this.getLabelText('y');
-    };
-    c3_axis_fn.textForY2AxisLabel = function textForY2AxisLabel() {
-        return this.getLabelText('y2');
-    };
-    c3_axis_fn.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 ? -$$.height / 2 : 0;
-        }
-    };
-    c3_axis_fn.dxForAxisLabel = function dxForAxisLabel(forHorizontal, position) {
-        if (forHorizontal) {
-            return position.isLeft ? "0.5em" : position.isRight ? "-0.5em" : "0";
-        } else {
-            return position.isTop ? "-0.5em" : position.isBottom ? "0.5em" : "0";
-        }
-    };
-    c3_axis_fn.textAnchorForAxisLabel = function textAnchorForAxisLabel(forHorizontal, position) {
-        if (forHorizontal) {
-            return position.isLeft ? 'start' : position.isCenter ? 'middle' : 'end';
-        } else {
-            return position.isBottom ? 'start' : position.isMiddle ? 'middle' : 'end';
-        }
-    };
-    c3_axis_fn.xForXAxisLabel = function xForXAxisLabel() {
-        return this.xForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
-    };
-    c3_axis_fn.xForYAxisLabel = function xForYAxisLabel() {
-        return this.xForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
-    };
-    c3_axis_fn.xForY2AxisLabel = function xForY2AxisLabel() {
-        return this.xForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
-    };
-    c3_axis_fn.dxForXAxisLabel = function dxForXAxisLabel() {
-        return this.dxForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
-    };
-    c3_axis_fn.dxForYAxisLabel = function dxForYAxisLabel() {
-        return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
-    };
-    c3_axis_fn.dxForY2AxisLabel = function dxForY2AxisLabel() {
-        return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
-    };
-    c3_axis_fn.dyForXAxisLabel = function dyForXAxisLabel() {
-        var $$ = 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";
-        }
-    };
-    c3_axis_fn.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 - ($$.config.axis_y_inner ? 0 : this.getMaxTickWidth('y') + 10);
-        }
-    };
-    c3_axis_fn.dyForY2AxisLabel = function dyForY2AxisLabel() {
-        var $$ = 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);
-        }
-    };
-    c3_axis_fn.textAnchorForXAxisLabel = function textAnchorForXAxisLabel() {
-        var $$ = this.owner;
-        return this.textAnchorForAxisLabel(!$$.config.axis_rotated, this.getXAxisLabelPosition());
-    };
-    c3_axis_fn.textAnchorForYAxisLabel = function textAnchorForYAxisLabel() {
-        var $$ = this.owner;
-        return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getYAxisLabelPosition());
-    };
-    c3_axis_fn.textAnchorForY2AxisLabel = function textAnchorForY2AxisLabel() {
-        var $$ = this.owner;
-        return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getY2AxisLabelPosition());
-    };
-    c3_axis_fn.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 $$.currentMaxTickWidths[id];
-    };
-
-    c3_axis_fn.updateLabels = function updateLabels(withTransition) {
-        var $$ = this.owner;
-        var axisXLabel = $$.main.select('.' + CLASS.axisX + ' .' + CLASS.axisXLabel),
-            axisYLabel = $$.main.select('.' + CLASS.axisY + ' .' + CLASS.axisYLabel),
-            axisY2Label = $$.main.select('.' + CLASS.axisY2 + ' .' + CLASS.axisY2Label);
-        (withTransition ? axisXLabel.transition() : axisXLabel).attr("x", this.xForXAxisLabel.bind(this)).attr("dx", this.dxForXAxisLabel.bind(this)).attr("dy", this.dyForXAxisLabel.bind(this)).text(this.textForXAxisLabel.bind(this));
-        (withTransition ? axisYLabel.transition() : axisYLabel).attr("x", this.xForYAxisLabel.bind(this)).attr("dx", this.dxForYAxisLabel.bind(this)).attr("dy", this.dyForYAxisLabel.bind(this)).text(this.textForYAxisLabel.bind(this));
-        (withTransition ? axisY2Label.transition() : axisY2Label).attr("x", this.xForY2AxisLabel.bind(this)).attr("dx", this.dxForY2AxisLabel.bind(this)).attr("dy", this.dyForY2AxisLabel.bind(this)).text(this.textForY2AxisLabel.bind(this));
-    };
-    c3_axis_fn.getPadding = function getPadding(padding, key, defaultValue, domainLength) {
-        var p = typeof padding === 'number' ? padding : padding[key];
-        if (!isValue(p)) {
-            return defaultValue;
-        }
-        if (padding.unit === 'ratio') {
-            return padding[key] * domainLength;
-        }
-        // assume padding is pixels if unit is not specified
-        return this.convertPixelsToAxisPadding(p, domainLength);
-    };
-    c3_axis_fn.convertPixelsToAxisPadding = function convertPixelsToAxisPadding(pixels, domainLength) {
-        var $$ = this.owner,
-            length = $$.config.axis_rotated ? $$.width : $$.height;
-        return domainLength * (pixels / length);
-    };
-    c3_axis_fn.generateTickValues = function generateTickValues(values, tickCount, forTimeSeries) {
-        var tickValues = values,
-            targetCount,
-            start,
-            end,
-            count,
-            interval,
-            i,
-            tickValue;
-        if (tickCount) {
-            targetCount = isFunction(tickCount) ? tickCount() : tickCount;
-            // compute ticks according to tickCount
-            if (targetCount === 1) {
-                tickValues = [values[0]];
-            } else if (targetCount === 2) {
-                tickValues = [values[0], values[values.length - 1]];
-            } else if (targetCount > 2) {
-                count = targetCount - 2;
-                start = values[0];
-                end = values[values.length - 1];
-                interval = (end - start) / (count + 1);
-                // re-construct unique values
-                tickValues = [start];
-                for (i = 0; i < count; i++) {
-                    tickValue = +start + interval * (i + 1);
-                    tickValues.push(forTimeSeries ? new Date(tickValue) : tickValue);
-                }
-                tickValues.push(end);
-            }
-        }
-        if (!forTimeSeries) {
-            tickValues = tickValues.sort(function (a, b) {
-                return a - b;
-            });
-        }
-        return tickValues;
-    };
-    c3_axis_fn.generateTransitions = function generateTransitions(duration) {
-        var $$ = this.owner,
-            axes = $$.axes;
-        return {
-            axisX: duration ? axes.x.transition().duration(duration) : axes.x,
-            axisY: duration ? axes.y.transition().duration(duration) : axes.y,
-            axisY2: duration ? axes.y2.transition().duration(duration) : axes.y2,
-            axisSubX: duration ? axes.subx.transition().duration(duration) : axes.subx
-        };
-    };
-    c3_axis_fn.redraw = function redraw(duration, isHidden) {
-        var $$ = 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($$.subXAxis, transition);
-    };
-
-    var c3 = { version: "0.6.1" };
-
-    var c3_chart_fn;
-    var c3_chart_internal_fn;
-
-    function Component(owner, componentKey, fn) {
-        this.owner = owner;
-        c3.chart.internal[componentKey] = fn;
-    }
-
-    function Chart(config) {
-        var $$ = 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);
-                }
-            });
-        })(c3_chart_fn, this, this);
-    }
-
-    function ChartInternal(api) {
-        var $$ = this;
-        $$.d3 = window.d3 ? window.d3 : typeof require !== 'undefined' ? require("d3") : undefined;
-        $$.api = api;
-        $$.config = $$.getDefaultConfig();
-        $$.data = {};
-        $$.cache = {};
-        $$.axes = {};
-    }
-
-    c3.generate = function (config) {
-        return new Chart(config);
-    };
-
-    c3.chart = {
-        fn: Chart.prototype,
-        internal: {
-            fn: ChartInternal.prototype
-        }
-    };
-    c3_chart_fn = c3.chart.fn;
-    c3_chart_internal_fn = c3.chart.internal.fn;
-
-    c3_chart_internal_fn.beforeInit = function () {
-        // can do something
-    };
-    c3_chart_internal_fn.afterInit = function () {
-        // can do something
-    };
-    c3_chart_internal_fn.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($$.convertColumnsToData(config.data_columns));
-        } else {
-            throw Error('url or json or rows or columns is required.');
-        }
-    };
-
-    c3_chart_internal_fn.initParams = function () {
-        var $$ = 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
-    };
-
-    c3_chart_internal_fn.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();
-        }
-    };
-
-    c3_chart_internal_fn.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 ($$.initSubchart) {
-            $$.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();
-        }
-
-        // Define g for chart
-        $$.initChartElements();
-
-        // Add Axis
-        $$.axis.init();
-
-        // Set targets
-        $$.updateTargets($$.data.targets);
-
-        // Cover whole with rects for events
-        $$.initEventRect();
-
-        // Set default extent if defined
-        if (config.axis_x_selection) {
-            $$.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();
-    };
-
-    c3_chart_internal_fn.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)
-                });
-            });
-        }
-    };
-
-    c3_chart_internal_fn.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 + $$.radiusExpanded * 1.1;
-        }
-    };
-
-    c3_chart_internal_fn.updateTargets = function (targets) {
-        var $$ = 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
-        $$.showTargets();
-    };
-    c3_chart_internal_fn.showTargets = function () {
-        var $$ = this;
-        $$.svg.selectAll('.' + CLASS.target).filter(function (d) {
-            return $$.isTargetToShow(d.id);
-        }).transition().duration($$.config.transition_duration).style("opacity", 1);
-    };
-
-    c3_chart_internal_fn.redraw = function (options, transitions) {
-        var $$ = 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;
-        });
-    };
-
-    c3_chart_internal_fn.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);
-    };
-    c3_chart_internal_fn.redrawWithoutRescale = function () {
-        this.redraw({
-            withY: false,
-            withSubchart: false,
-            withEventRect: false,
-            withTransitionForAxis: false
-        });
-    };
-
-    c3_chart_internal_fn.isTimeSeries = function () {
-        return this.config.axis_x_type === 'timeseries';
-    };
-    c3_chart_internal_fn.isCategorized = function () {
-        return this.config.axis_x_type.indexOf('categor') >= 0;
-    };
-    c3_chart_internal_fn.isCustomX = function () {
-        var $$ = this,
-            config = $$.config;
-        return !$$.isTimeSeries() && (config.data_x || notEmpty(config.data_xs));
-    };
-
-    c3_chart_internal_fn.isTimeSeriesY = function () {
-        return this.config.axis_y_type === 'timeseries';
-    };
-
-    c3_chart_internal_fn.getTranslate = function (target) {
-        var $$ = 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 + ")";
-    };
-    c3_chart_internal_fn.initialOpacity = function (d) {
-        return d.value !== null && this.withoutFadeIn[d.id] ? 1 : 0;
-    };
-    c3_chart_internal_fn.initialOpacityForCircle = function (d) {
-        return d.value !== null && this.withoutFadeIn[d.id] ? this.opacityForCircle(d) : 0;
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.opacityForText = function () {
-        return this.hasDataLabel() ? 1 : 0;
-    };
-    c3_chart_internal_fn.xx = function (d) {
-        return d ? this.x(d.x) : null;
-    };
-    c3_chart_internal_fn.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));
-    };
-    c3_chart_internal_fn.yv = function (d) {
-        var $$ = this,
-            yScale = d.axis && d.axis === 'y2' ? $$.y2 : $$.y;
-        return Math.ceil(yScale(d.value));
-    };
-    c3_chart_internal_fn.subxx = function (d) {
-        return d ? this.subX(d.x) : null;
-    };
-
-    c3_chart_internal_fn.transformMain = function (withTransition, transitions) {
-        var $$ = 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", $$.getTranslate('arc'));
-    };
-    c3_chart_internal_fn.transformAll = function (withTransition, transitions) {
-        var $$ = this;
-        $$.transformMain(withTransition, transitions);
-        if ($$.config.subchart_show) {
-            $$.transformContext(withTransition, transitions);
-        }
-        if ($$.legend) {
-            $$.transformLegend(withTransition);
-        }
-    };
-
-    c3_chart_internal_fn.updateSvgSize = function () {
-        var $$ = 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");
-    };
-
-    c3_chart_internal_fn.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);
-    };
-
-    c3_chart_internal_fn.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();
-                            }
-                            $$.config.oninit.call($$);
-                            $$.redraw({
-                                withTransform: true,
-                                withUpdateXDomain: true,
-                                withUpdateOrgXDomain: true,
-                                withTransition: false,
-                                withTransitionForTransform: false,
-                                withLegend: true
-                            });
-                            selection.transition().style('opacity', 1);
-                        }
-                    }, 10);
-                }
-            });
-        });
-        observer.observe(selection.node(), { attributes: true, childList: true, characterData: true });
-    };
-
-    c3_chart_internal_fn.bindResize = function () {
-        var $$ = 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();
-            };
-        }
-    };
-
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.endall = function (transition, callback) {
-        var n = 0;
-        transition.each(function () {
-            ++n;
-        }).on("end", function () {
-            if (! --n) {
-                callback.apply(this, arguments);
-            }
-        });
-    };
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.isValue = isValue;
-    c3_chart_internal_fn.isFunction = isFunction;
-    c3_chart_internal_fn.isString = isString;
-    c3_chart_internal_fn.isUndefined = isUndefined;
-    c3_chart_internal_fn.isDefined = isDefined;
-    c3_chart_internal_fn.ceil10 = ceil10;
-    c3_chart_internal_fn.asHalfPixel = asHalfPixel;
-    c3_chart_internal_fn.diffDomain = diffDomain;
-    c3_chart_internal_fn.isEmpty = isEmpty;
-    c3_chart_internal_fn.notEmpty = notEmpty;
-    c3_chart_internal_fn.notEmpty = notEmpty;
-    c3_chart_internal_fn.getOption = getOption;
-    c3_chart_internal_fn.hasValue = hasValue;
-    c3_chart_internal_fn.sanitise = sanitise;
-    c3_chart_internal_fn.getPathBox = getPathBox;
-    c3_chart_internal_fn.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 */
-
-    c3_chart_fn.axis = function () {};
-    c3_chart_fn.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?
-    };
-    c3_chart_fn.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;
-            }
-            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
-        } else {
-            return {
-                x: config.axis_x_max,
-                y: config.axis_y_max,
-                y2: config.axis_y2_max
-            };
-        }
-    };
-    c3_chart_fn.axis.min = function (min) {
-        var $$ = 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
-            };
-        }
-    };
-    c3_chart_fn.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()
-            };
-        }
-    };
-
-    c3_chart_fn.category = function (i, category) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (arguments.length > 1) {
-            config.axis_x_categories[i] = category;
-            $$.redraw();
-        }
-        return config.axis_x_categories[i];
-    };
-    c3_chart_fn.categories = function (categories) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!arguments.length) {
-            return config.axis_x_categories;
-        }
-        config.axis_x_categories = categories;
-        $$.redraw();
-        return config.axis_x_categories;
-    };
-
-    c3_chart_fn.resize = function (size) {
-        var $$ = this.internal,
-            config = $$.config;
-        config.size_width = size ? size.width : null;
-        config.size_height = size ? size.height : null;
-        this.flush();
-    };
-
-    c3_chart_fn.flush = function () {
-        var $$ = this.internal;
-        $$.updateAndRedraw({ withLegend: true, withTransition: false, withTransitionForTransform: false });
-    };
-
-    c3_chart_fn.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) {
-            $$[key] = null;
-        });
-
-        return null;
-    };
-
-    // TODO: fix
-    c3_chart_fn.color = function (id) {
-        var $$ = this.internal;
-        return $$.color(id); // more patterns
-    };
-
-    c3_chart_fn.data = function (targetIds) {
-        var targets = this.internal.data.targets;
-        return typeof targetIds === 'undefined' ? targets : targets.filter(function (t) {
-            return [].concat(targetIds).indexOf(t.id) >= 0;
-        });
-    };
-    c3_chart_fn.data.shown = function (targetIds) {
-        return this.internal.filterTargetsToShow(this.data(targetIds));
-    };
-    c3_chart_fn.data.values = function (targetId) {
-        var targets,
-            values = null;
-        if (targetId) {
-            targets = this.data(targetId);
-            values = targets[0] ? targets[0].values.map(function (d) {
-                return d.value;
-            }) : null;
-        }
-        return values;
-    };
-    c3_chart_fn.data.names = function (names) {
-        this.internal.clearLegendItemTextBoxCache();
-        return this.internal.updateDataAttributes('names', names);
-    };
-    c3_chart_fn.data.colors = function (colors) {
-        return this.internal.updateDataAttributes('colors', colors);
-    };
-    c3_chart_fn.data.axes = function (axes) {
-        return this.internal.updateDataAttributes('axes', axes);
-    };
-
-    c3_chart_fn.flow = function (args) {
-        var $$ = 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 : $$.config.transition_duration,
-                done: args.done,
-                orgDataCount: orgDataCount
-            },
-            withLegend: true,
-            withTransition: orgDataCount > 1,
-            withTrimXDomain: false,
-            withUpdateXAxis: true
-        });
-    };
-
-    c3_chart_internal_fn.generateFlow = function (args) {
-        var $$ = 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();
-
-                $$.flowing = false;
-            });
-        };
-    };
-
-    c3_chart_fn.focus = function (targetIds) {
-        var $$ = 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 = $$.defocusedTargetIds.filter(function (id) {
-            return targetIds.indexOf(id) < 0;
-        });
-    };
-
-    c3_chart_fn.defocus = function (targetIds) {
-        var $$ = 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;
-        });
-        $$.defocusedTargetIds = targetIds;
-    };
-
-    c3_chart_fn.revert = function (targetIds) {
-        var $$ = 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 = [];
-    };
-
-    c3_chart_fn.xgrids = function (grids) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!grids) {
-            return config.grid_x_lines;
-        }
-        config.grid_x_lines = grids;
-        $$.redrawWithoutRescale();
-        return config.grid_x_lines;
-    };
-    c3_chart_fn.xgrids.add = function (grids) {
-        var $$ = this.internal;
-        return this.xgrids($$.config.grid_x_lines.concat(grids ? grids : []));
-    };
-    c3_chart_fn.xgrids.remove = function (params) {
-        // TODO: multiple
-        var $$ = this.internal;
-        $$.removeGridLines(params, true);
-    };
-
-    c3_chart_fn.ygrids = function (grids) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!grids) {
-            return config.grid_y_lines;
-        }
-        config.grid_y_lines = grids;
-        $$.redrawWithoutRescale();
-        return config.grid_y_lines;
-    };
-    c3_chart_fn.ygrids.add = function (grids) {
-        var $$ = this.internal;
-        return this.ygrids($$.config.grid_y_lines.concat(grids ? grids : []));
-    };
-    c3_chart_fn.ygrids.remove = function (params) {
-        // TODO: multiple
-        var $$ = this.internal;
-        $$.removeGridLines(params, false);
-    };
-
-    c3_chart_fn.groups = function (groups) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (isUndefined(groups)) {
-            return config.data_groups;
-        }
-        config.data_groups = groups;
-        $$.redraw();
-        return config.data_groups;
-    };
-
-    c3_chart_fn.legend = function () {};
-    c3_chart_fn.legend.show = function (targetIds) {
-        var $$ = this.internal;
-        $$.showLegend($$.mapToTargetIds(targetIds));
-        $$.updateAndRedraw({ withLegend: true });
-    };
-    c3_chart_fn.legend.hide = function (targetIds) {
-        var $$ = this.internal;
-        $$.hideLegend($$.mapToTargetIds(targetIds));
-        $$.updateAndRedraw({ withLegend: true });
-    };
-
-    c3_chart_fn.load = function (args) {
-        var $$ = this.internal,
-            config = $$.config;
-        // update xs if specified
-        if (args.xs) {
-            $$.addXs(args.xs);
-        }
-        // update names if exists
-        if ('names' in args) {
-            c3_chart_fn.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);
-        }
-    };
-
-    c3_chart_fn.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();
-            }
-        });
-    };
-
-    c3_chart_fn.regions = function (regions) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!regions) {
-            return config.regions;
-        }
-        config.regions = regions;
-        $$.redrawWithoutRescale();
-        return config.regions;
-    };
-    c3_chart_fn.regions.add = function (regions) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!regions) {
-            return config.regions;
-        }
-        config.regions = config.regions.concat(regions);
-        $$.redrawWithoutRescale();
-        return config.regions;
-    };
-    c3_chart_fn.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 = $$.main.select('.' + CLASS.regions).selectAll(classes.map(function (c) {
-            return '.' + c;
-        }));
-        (duration ? regions.transition().duration(duration) : regions).style('opacity', 0).remove();
-
-        config.regions = config.regions.filter(function (region) {
-            var found = false;
-            if (!region['class']) {
-                return true;
-            }
-            region['class'].split(' ').forEach(function (c) {
-                if (classes.indexOf(c) >= 0) {
-                    found = true;
-                }
-            });
-            return !found;
-        });
-
-        return config.regions;
-    };
-
-    c3_chart_fn.selected = function (targetId) {
-        var $$ = this.internal,
-            d3 = $$.d3;
-        return d3.merge($$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(targetId)).selectAll('.' + CLASS.shape).filter(function () {
-            return d3.select(this).classed(CLASS.SELECTED);
-        }).map(function (d) {
-            return d.map(function (d) {
-                var data = d.__data__;return data.data ? data.data : data;
-            });
-        }));
-    };
-    c3_chart_fn.select = function (ids, indices, resetOther) {
-        var $$ = 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($$),
-                isTargetId = config.data_selection_grouped || !ids || ids.indexOf(id) >= 0,
-                isTargetIndex = !indices || indices.indexOf(i) >= 0,
-                isSelected = shape.classed(CLASS.SELECTED);
-            // line/area selection not supported yet
-            if (shape.classed(CLASS.line) || shape.classed(CLASS.area)) {
-                return;
-            }
-            if (isTargetId && isTargetIndex) {
-                if (config.data_selection_isselectable(d) && !isSelected) {
-                    toggle(true, shape.classed(CLASS.SELECTED, true), d, i);
-                }
-            } else if (isDefined(resetOther) && resetOther) {
-                if (isSelected) {
-                    toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
-                }
-            }
-        });
-    };
-    c3_chart_fn.unselect = function (ids, indices) {
-        var $$ = 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($$),
-                isTargetId = config.data_selection_grouped || !ids || ids.indexOf(id) >= 0,
-                isTargetIndex = !indices || indices.indexOf(i) >= 0,
-                isSelected = shape.classed(CLASS.SELECTED);
-            // line/area selection not supported yet
-            if (shape.classed(CLASS.line) || shape.classed(CLASS.area)) {
-                return;
-            }
-            if (isTargetId && isTargetIndex) {
-                if (config.data_selection_isselectable(d)) {
-                    if (isSelected) {
-                        toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
-                    }
-                }
-            }
-        });
-    };
-
-    c3_chart_fn.show = function (targetIds, options) {
-        var $$ = 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);
-        }
-
-        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
-    };
-
-    c3_chart_fn.hide = function (targetIds, options) {
-        var $$ = 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);
-        }
-
-        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
-    };
-
-    c3_chart_fn.toggle = function (targetIds, options) {
-        var that = this,
-            $$ = this.internal;
-        $$.mapToTargetIds(targetIds).forEach(function (targetId) {
-            $$.isTargetToShow(targetId) ? that.hide(targetId, options) : that.show(targetId, options);
-        });
-    };
-
-    c3_chart_fn.tooltip = function () {};
-    c3_chart_fn.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);
-    };
-    c3_chart_fn.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);
-    };
-
-    c3_chart_fn.transform = function (type, targetIds) {
-        var $$ = this.internal,
-            options = ['pie', 'donut'].indexOf(type) >= 0 ? { withTransform: true } : null;
-        $$.transformTo(targetIds, type, options);
-    };
-
-    c3_chart_internal_fn.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
-        $$.updateAndRedraw(options);
-    };
-
-    c3_chart_fn.x = function (x) {
-        var $$ = this.internal;
-        if (arguments.length) {
-            $$.updateTargetX($$.data.targets, x);
-            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
-        }
-        return $$.data.xs;
-    };
-    c3_chart_fn.xs = function (xs) {
-        var $$ = this.internal;
-        if (arguments.length) {
-            $$.updateTargetXs($$.data.targets, xs);
-            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
-        }
-        return $$.data.xs;
-    };
-
-    c3_chart_fn.zoom = function (domain) {
-        var $$ = 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();
-        }
-    };
-    c3_chart_fn.zoom.enable = function (enabled) {
-        var $$ = this.internal;
-        $$.config.zoom_enabled = enabled;
-        $$.updateAndRedraw();
-    };
-    c3_chart_fn.unzoom = function () {
-        var $$ = this.internal;
-        if ($$.config.subchart_show) {
-            $$.brush.clear();
-        } else {
-            $$.updateXDomain(null, true, false, false, $$.subX.domain());
-            $$.redraw({ withY: $$.config.zoom_rescale, withSubchart: false });
-        }
-    };
-
-    c3_chart_fn.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;
-        }
-    };
-
-    c3_chart_fn.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;
-        }
-    };
-
-    c3_chart_fn.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()
-            };
-        }
-    };
-
-    c3_chart_internal_fn.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;
-            };
-        }
-
-        $$.pie.sort(orderFct || null);
-    };
-
-    c3_chart_internal_fn.updateRadius = function () {
-        var $$ = 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 : $$.radius;
-    };
-
-    c3_chart_internal_fn.updateArc = function () {
-        var $$ = this;
-        $$.svgArc = $$.getSvgArc();
-        $$.svgArcExpanded = $$.getSvgArcExpanded();
-        $$.svgArcExpandedSub = $$.getSvgArcExpanded(0.98);
-    };
-
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.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 = $$.updateAngle(d);
-            return updated ? arc(updated) : "M 0 0";
-        };
-        // TODO: extends all function
-        newArc.centroid = arc.centroid;
-        return newArc;
-    };
-
-    c3_chart_internal_fn.getSvgArcExpanded = function (rate) {
-        rate = rate || 1;
-        var $$ = 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";
-        };
-    };
-
-    c3_chart_internal_fn.getArc = function (d, withoutUpdate, force) {
-        return force || this.isArcType(d.data) ? this.svgArc(d, withoutUpdate) : "M 0 0";
-    };
-
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.getArcRatio = function (d) {
-        var $$ = this,
-            config = $$.config,
-            whole = Math.PI * ($$.hasType('gauge') && !config.gauge_fullCircle ? 1 : 2);
-        return d ? (d.endAngle - d.startAngle) / whole : null;
-    };
-
-    c3_chart_internal_fn.convertToArcData = function (d) {
-        return this.addName({
-            id: d.data.id,
-            value: d.value,
-            ratio: this.getArcRatio(d),
-            index: d.index
-        });
-    };
-
-    c3_chart_internal_fn.textForArcLabel = function (d) {
-        var $$ = 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) : $$.defaultArcValueFormat(value, ratio);
-    };
-
-    c3_chart_internal_fn.textForGaugeMinMax = function (value, isMax) {
-        var $$ = this,
-            format = $$.getGaugeLabelExtents();
-
-        return format ? format(value, isMax) : value;
-    };
-
-    c3_chart_internal_fn.expandArc = function (targetIds) {
-        var $$ = 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)) {
-                    // callback here
-                }
-            });
-        });
-    };
-
-    c3_chart_internal_fn.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);
-    };
-
-    c3_chart_internal_fn.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 ($$.isPieType(id)) {
-            return config.pie_expand_duration;
-        } else {
-            return 50;
-        }
-    };
-
-    c3_chart_internal_fn.shouldExpand = function (id) {
-        var $$ = this,
-            config = $$.config;
-        return $$.isDonutType(id) && config.donut_expand || $$.isGaugeType(id) && config.gauge_expand || $$.isPieType(id) && config.pie_expand;
-    };
-
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.meetsArcLabelThreshold = function (ratio) {
-        var $$ = this,
-            config = $$.config,
-            threshold = $$.hasType('donut') ? config.donut_label_threshold : config.pie_label_threshold;
-        return ratio >= threshold;
-    };
-
-    c3_chart_internal_fn.getArcLabelFormat = function () {
-        var $$ = this,
-            config = $$.config,
-            format = config.pie_label_format;
-        if ($$.hasType('gauge')) {
-            format = config.gauge_label_format;
-        } else if ($$.hasType('donut')) {
-            format = config.donut_label_format;
-        }
-        return format;
-    };
-
-    c3_chart_internal_fn.getGaugeLabelExtents = function () {
-        var $$ = this,
-            config = $$.config;
-        return config.gauge_label_extents;
-    };
-
-    c3_chart_internal_fn.getArcTitle = function () {
-        var $$ = this;
-        return $$.hasType('donut') ? $$.config.donut_title : "";
-    };
-
-    c3_chart_internal_fn.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();
-    };
-
-    c3_chart_internal_fn.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());
-    };
-
-    c3_chart_internal_fn.redrawArc = function (duration, durationForExit, withTransform) {
-        var $$ = this,
-            d3 = $$.d3,
-            config = $$.config,
-            main = $$.main,
-            arcs,
-            mainArc,
-            backgroundArc,
-            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;
-            backgroundArc = $$.arcs.select('g.' + CLASS.chartArcsBackground).selectAll('path.' + CLASS.chartArcsBackground).data($$.data.targets);
-            backgroundArc.enter().append("path");
-            backgroundArc.attr("class", function (d, i) {
-                return CLASS.chartArcsBackground + ' ' + CLASS.chartArcsBackground + '-' + i;
-            }).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) : '');
-        }
-    };
-    c3_chart_internal_fn.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");
-        }
-    };
-    c3_chart_internal_fn.getGaugeLabelHeight = function () {
-        return this.config.gauge_label_show ? 20 : 0;
-    };
-
-    c3_chart_internal_fn.hasCaches = function (ids) {
-        for (var i = 0; i < ids.length; i++) {
-            if (!(ids[i] in this.cache)) {
-                return false;
-            }
-        }
-        return true;
-    };
-    c3_chart_internal_fn.addCache = function (id, target) {
-        this.cache[id] = this.cloneTarget(target);
-    };
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.categoryName = function (i) {
-        var config = this.config;
-        return i < config.axis_x_categories.length ? config.axis_x_categories[i] : i;
-    };
-
-    c3_chart_internal_fn.generateTargetClass = function (targetId) {
-        return targetId || targetId === 0 ? ('-' + targetId).replace(/\s/g, '-') : '';
-    };
-    c3_chart_internal_fn.generateClass = function (prefix, targetId) {
-        return " " + prefix + " " + prefix + this.generateTargetClass(targetId);
-    };
-    c3_chart_internal_fn.classText = function (d) {
-        return this.generateClass(CLASS.text, d.index);
-    };
-    c3_chart_internal_fn.classTexts = function (d) {
-        return this.generateClass(CLASS.texts, d.id);
-    };
-    c3_chart_internal_fn.classShape = function (d) {
-        return this.generateClass(CLASS.shape, d.index);
-    };
-    c3_chart_internal_fn.classShapes = function (d) {
-        return this.generateClass(CLASS.shapes, d.id);
-    };
-    c3_chart_internal_fn.classLine = function (d) {
-        return this.classShape(d) + this.generateClass(CLASS.line, d.id);
-    };
-    c3_chart_internal_fn.classLines = function (d) {
-        return this.classShapes(d) + this.generateClass(CLASS.lines, d.id);
-    };
-    c3_chart_internal_fn.classCircle = function (d) {
-        return this.classShape(d) + this.generateClass(CLASS.circle, d.index);
-    };
-    c3_chart_internal_fn.classCircles = function (d) {
-        return this.classShapes(d) + this.generateClass(CLASS.circles, d.id);
-    };
-    c3_chart_internal_fn.classBar = function (d) {
-        return this.classShape(d) + this.generateClass(CLASS.bar, d.index);
-    };
-    c3_chart_internal_fn.classBars = function (d) {
-        return this.classShapes(d) + this.generateClass(CLASS.bars, d.id);
-    };
-    c3_chart_internal_fn.classArc = function (d) {
-        return this.classShape(d.data) + this.generateClass(CLASS.arc, d.data.id);
-    };
-    c3_chart_internal_fn.classArcs = function (d) {
-        return this.classShapes(d.data) + this.generateClass(CLASS.arcs, d.data.id);
-    };
-    c3_chart_internal_fn.classArea = function (d) {
-        return this.classShape(d) + this.generateClass(CLASS.area, d.id);
-    };
-    c3_chart_internal_fn.classAreas = function (d) {
-        return this.classShapes(d) + this.generateClass(CLASS.areas, d.id);
-    };
-    c3_chart_internal_fn.classRegion = function (d, i) {
-        return this.generateClass(CLASS.region, i) + ' ' + ('class' in d ? d['class'] : '');
-    };
-    c3_chart_internal_fn.classEvent = function (d) {
-        return this.generateClass(CLASS.eventRect, d.index);
-    };
-    c3_chart_internal_fn.classTarget = function (id) {
-        var $$ = this;
-        var additionalClassSuffix = $$.config.data_classes[id],
-            additionalClass = '';
-        if (additionalClassSuffix) {
-            additionalClass = ' ' + CLASS.target + '-' + additionalClassSuffix;
-        }
-        return $$.generateClass(CLASS.target, id) + additionalClass;
-    };
-    c3_chart_internal_fn.classFocus = function (d) {
-        return this.classFocused(d) + this.classDefocused(d);
-    };
-    c3_chart_internal_fn.classFocused = function (d) {
-        return ' ' + (this.focusedTargetIds.indexOf(d.id) >= 0 ? CLASS.focused : '');
-    };
-    c3_chart_internal_fn.classDefocused = function (d) {
-        return ' ' + (this.defocusedTargetIds.indexOf(d.id) >= 0 ? CLASS.defocused : '');
-    };
-    c3_chart_internal_fn.classChartText = function (d) {
-        return CLASS.chartText + this.classTarget(d.id);
-    };
-    c3_chart_internal_fn.classChartLine = function (d) {
-        return CLASS.chartLine + this.classTarget(d.id);
-    };
-    c3_chart_internal_fn.classChartBar = function (d) {
-        return CLASS.chartBar + this.classTarget(d.id);
-    };
-    c3_chart_internal_fn.classChartArc = function (d) {
-        return CLASS.chartArc + this.classTarget(d.data.id);
-    };
-    c3_chart_internal_fn.getTargetSelectorSuffix = function (targetId) {
-        return this.generateTargetClass(targetId).replace(/([?!@#$%^&*()_=+,.<>'":;\[\]\/|~`{}\\])/g, '\\$1');
-    };
-    c3_chart_internal_fn.selectorTarget = function (id, prefix) {
-        return (prefix || '') + '.' + CLASS.target + this.getTargetSelectorSuffix(id);
-    };
-    c3_chart_internal_fn.selectorTargets = function (ids, prefix) {
-        var $$ = this;
-        ids = ids || [];
-        return ids.length ? ids.map(function (id) {
-            return $$.selectorTarget(id, prefix);
-        }) : null;
-    };
-    c3_chart_internal_fn.selectorLegend = function (id) {
-        return '.' + CLASS.legendItem + this.getTargetSelectorSuffix(id);
-    };
-    c3_chart_internal_fn.selectorLegends = function (ids) {
-        var $$ = this;
-        return ids && ids.length ? ids.map(function (id) {
-            return $$.selectorLegend(id);
-        }) : null;
-    };
-
-    c3_chart_internal_fn.getClipPath = function (id) {
-        var isIE9 = window.navigator.appVersion.toLowerCase().indexOf("msie 9.") >= 0;
-        return "url(" + (isIE9 ? "" : document.URL.split('#')[0]) + "#" + id + ")";
-    };
-    c3_chart_internal_fn.appendClip = function (parent, id) {
-        return parent.append("clipPath").attr("id", id).append("rect");
-    };
-    c3_chart_internal_fn.getAxisClipX = function (forHorizontal) {
-        // axis line width + padding for left
-        var left = Math.max(30, this.margin.left);
-        return forHorizontal ? -(1 + left) : -(left - 1);
-    };
-    c3_chart_internal_fn.getAxisClipY = function (forHorizontal) {
-        return forHorizontal ? -20 : -this.margin.top;
-    };
-    c3_chart_internal_fn.getXAxisClipX = function () {
-        var $$ = this;
-        return $$.getAxisClipX(!$$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getXAxisClipY = function () {
-        var $$ = this;
-        return $$.getAxisClipY(!$$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getYAxisClipX = function () {
-        var $$ = this;
-        return $$.config.axis_y_inner ? -1 : $$.getAxisClipX($$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getYAxisClipY = function () {
-        var $$ = this;
-        return $$.getAxisClipY($$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getAxisClipWidth = function (forHorizontal) {
-        var $$ = 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;
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.getXAxisClipWidth = function () {
-        var $$ = this;
-        return $$.getAxisClipWidth(!$$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getXAxisClipHeight = function () {
-        var $$ = this;
-        return $$.getAxisClipHeight(!$$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getYAxisClipWidth = function () {
-        var $$ = this;
-        return $$.getAxisClipWidth($$.config.axis_rotated) + ($$.config.axis_y_inner ? 20 : 0);
-    };
-    c3_chart_internal_fn.getYAxisClipHeight = function () {
-        var $$ = this;
-        return $$.getAxisClipHeight($$.config.axis_rotated);
-    };
-
-    c3_chart_internal_fn.generateColor = function () {
-        var $$ = 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;
-        };
-    };
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.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_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;
-    };
-    c3_chart_internal_fn.additionalConfig = {};
-
-    c3_chart_internal_fn.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;
-            }
-        });
-    };
-
-    c3_chart_internal_fn.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($$, data, keys));
-        }).catch(function (error) {
-            throw error;
-        });
-    };
-    c3_chart_internal_fn.convertXsvToData = function (xsv) {
-        var keys = xsv.columns,
-            rows = xsv;
-        if (rows.length === 0) {
-            return { keys: keys, rows: [keys.reduce(function (row, key) {
-                    return Object.assign(row, defineProperty({}, key, null));
-                }, {})] };
-        } else {
-            // [].concat() is to convert result into a plain array otherwise
-            // test is not happy because rows have properties.
-            return { keys: keys, rows: [].concat(xsv) };
-        }
-    };
-    c3_chart_internal_fn.convertJsonToData = function (json, keys) {
-        var $$ = 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;
-    };
-    c3_chart_internal_fn.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}
-     */
-    c3_chart_internal_fn.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}
-     */
-    c3_chart_internal_fn.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 $$.data.xs, False to replace.
-     * @return {!Array}
-     */
-    c3_chart_internal_fn.convertDataToTargets = function (data, appendXs) {
-        var $$ = 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;
-    };
-
-    c3_chart_internal_fn.isX = function (key) {
-        var $$ = this,
-            config = $$.config;
-        return config.data_x && key === config.data_x || notEmpty(config.data_xs) && hasValue(config.data_xs, key);
-    };
-    c3_chart_internal_fn.isNotX = function (key) {
-        return !this.isX(key);
-    };
-    c3_chart_internal_fn.getXKey = function (id) {
-        var $$ = this,
-            config = $$.config;
-        return config.data_x ? config.data_x : notEmpty(config.data_xs) ? config.data_xs[id] : null;
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.getXValue = function (id, i) {
-        var $$ = this;
-        return id in $$.data.xs && $$.data.xs[id] && isValue($$.data.xs[id][i]) ? $$.data.xs[id][i] : i;
-    };
-    c3_chart_internal_fn.getOtherTargetXs = function () {
-        var $$ = this,
-            idsForX = Object.keys($$.data.xs);
-        return idsForX.length ? $$.data.xs[idsForX[0]] : null;
-    };
-    c3_chart_internal_fn.getOtherTargetX = function (index) {
-        var xs = this.getOtherTargetXs();
-        return xs && index < xs.length ? xs[index] : null;
-    };
-    c3_chart_internal_fn.addXs = function (xs) {
-        var $$ = this;
-        Object.keys(xs).forEach(function (id) {
-            $$.config.data_xs[id] = xs[id];
-        });
-    };
-    c3_chart_internal_fn.addName = function (data) {
-        var $$ = this,
-            name;
-        if (data) {
-            name = $$.config.data_names[data.id];
-            data.name = name !== undefined ? name : data.id;
-        }
-        return data;
-    };
-    c3_chart_internal_fn.getValueOnIndex = function (values, index) {
-        var valueOnIndex = values.filter(function (v) {
-            return v.index === index;
-        });
-        return valueOnIndex.length ? valueOnIndex[0] : null;
-    };
-    c3_chart_internal_fn.updateTargetX = function (targets, x) {
-        var $$ = this;
-        targets.forEach(function (t) {
-            t.values.forEach(function (v, i) {
-                v.x = $$.generateTargetX(x[i], t.id, i);
-            });
-            $$.data.xs[t.id] = x;
-        });
-    };
-    c3_chart_internal_fn.updateTargetXs = function (targets, xs) {
-        var $$ = this;
-        targets.forEach(function (t) {
-            if (xs[t.id]) {
-                $$.updateTargetX([t], xs[t.id]);
-            }
-        });
-    };
-    c3_chart_internal_fn.generateTargetX = function (rawX, id, index) {
-        var $$ = this,
-            x;
-        if ($$.isTimeSeries()) {
-            x = rawX ? $$.parseDate(rawX) : $$.parseDate($$.getXValue(id, index));
-        } else if ($$.isCustomX() && !$$.isCategorized()) {
-            x = isValue(rawX) ? +rawX : $$.getXValue(id, index);
-        } else {
-            x = index;
-        }
-        return x;
-    };
-    c3_chart_internal_fn.cloneTarget = function (target) {
-        return {
-            id: target.id,
-            id_org: target.id_org,
-            values: target.values.map(function (d) {
-                return { x: d.x, value: d.value, id: d.id };
-            })
-        };
-    };
-    c3_chart_internal_fn.getMaxDataCount = function () {
-        var $$ = this;
-        return $$.d3.max($$.data.targets, function (t) {
-            return t.values.length;
-        });
-    };
-    c3_chart_internal_fn.mapToIds = function (targets) {
-        return targets.map(function (d) {
-            return d.id;
-        });
-    };
-    c3_chart_internal_fn.mapToTargetIds = function (ids) {
-        var $$ = this;
-        return ids ? [].concat(ids) : $$.mapToIds($$.data.targets);
-    };
-    c3_chart_internal_fn.hasTarget = function (targets, id) {
-        var ids = this.mapToIds(targets),
-            i;
-        for (i = 0; i < ids.length; i++) {
-            if (ids[i] === id) {
-                return true;
-            }
-        }
-        return false;
-    };
-    c3_chart_internal_fn.isTargetToShow = function (targetId) {
-        return this.hiddenTargetIds.indexOf(targetId) < 0;
-    };
-    c3_chart_internal_fn.isLegendToShow = function (targetId) {
-        return this.hiddenLegendIds.indexOf(targetId) < 0;
-    };
-    c3_chart_internal_fn.filterTargetsToShow = function (targets) {
-        var $$ = this;
-        return targets.filter(function (t) {
-            return $$.isTargetToShow(t.id);
-        });
-    };
-    c3_chart_internal_fn.mapTargetsToUniqueXs = function (targets) {
-        var $$ = 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;
-        });
-    };
-    c3_chart_internal_fn.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]);
-            }
-        }
-    };
-    c3_chart_internal_fn.removeHiddenTargetIds = function (targetIds) {
-        this.hiddenTargetIds = this.hiddenTargetIds.filter(function (id) {
-            return targetIds.indexOf(id) < 0;
-        });
-    };
-    c3_chart_internal_fn.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]);
-            }
-        }
-    };
-    c3_chart_internal_fn.removeHiddenLegendIds = function (targetIds) {
-        this.hiddenLegendIds = this.hiddenLegendIds.filter(function (id) {
-            return targetIds.indexOf(id) < 0;
-        });
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.hasNegativeValueInTargets = function (targets) {
-        return this.checkValueInTargets(targets, function (v) {
-            return v < 0;
-        });
-    };
-    c3_chart_internal_fn.hasPositiveValueInTargets = function (targets) {
-        return this.checkValueInTargets(targets, function (v) {
-            return v > 0;
-        });
-    };
-    c3_chart_internal_fn.isOrderDesc = function () {
-        var config = this.config;
-        return typeof config.data_order === 'string' && config.data_order.toLowerCase() === 'desc';
-    };
-    c3_chart_internal_fn.isOrderAsc = function () {
-        var config = this.config;
-        return typeof config.data_order === 'string' && config.data_order.toLowerCase() === 'asc';
-    };
-    c3_chart_internal_fn.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);
-            };
-        }
-    };
-    c3_chart_internal_fn.orderTargets = function (targets) {
-        var fct = this.getOrderFunction();
-        if (fct) {
-            targets.sort(fct);
-        }
-        return targets;
-    };
-    c3_chart_internal_fn.filterByX = function (targets, x) {
-        return this.d3.merge(targets.map(function (t) {
-            return t.values;
-        })).filter(function (v) {
-            return v.x - x === 0;
-        });
-    };
-    c3_chart_internal_fn.filterRemoveNull = function (data) {
-        return data.filter(function (d) {
-            return isValue(d.value);
-        });
-    };
-    c3_chart_internal_fn.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];
-                })
-            };
-        });
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.isNoneArc = function (d) {
-        return this.hasTarget(this.data.targets, d.id);
-    }, c3_chart_internal_fn.isArc = function (d) {
-        return 'data' in d && this.hasTarget(this.data.targets, d.data.id);
-    };
-    c3_chart_internal_fn.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 $$.findClosest(candidates, pos);
-    };
-    c3_chart_internal_fn.findClosest = function (values, pos) {
-        var $$ = 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;
-    };
-    c3_chart_internal_fn.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));
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.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];
-        });
-        $$.redraw({ withLegend: true });
-        return current;
-    };
-
-    c3_chart_internal_fn.load = function (targets, args) {
-        var $$ = 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
-        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
-
-        if (args.done) {
-            args.done();
-        }
-    };
-    c3_chart_internal_fn.loadFromArgs = function (args) {
-        var $$ = 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 {
-            $$.load(null, args);
-        }
-    };
-    c3_chart_internal_fn.unload = function (targetIds, done) {
-        var $$ = 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 = $$.data.targets.filter(function (t) {
-                return t.id !== id;
-            });
-        });
-    };
-
-    c3_chart_internal_fn.getYDomainMin = function (targets) {
-        var $$ = 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]);
-        }));
-    };
-    c3_chart_internal_fn.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 $$.d3.max(ys[key]);
-        }));
-    };
-    c3_chart_internal_fn.getYDomain = function (targets, axisId, xDomain) {
-        var $$ = 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;
-    };
-    c3_chart_internal_fn.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 $$.d3.min(t.values, function (v) {
-                return v.x;
-            });
-        });
-    };
-    c3_chart_internal_fn.getXDomainMax = function (targets) {
-        var $$ = 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;
-            });
-        });
-    };
-    c3_chart_internal_fn.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 = $$.getMaxDataCount();
-            padding = maxDataCount > 1 ? diff / (maxDataCount - 1) / 2 : 0.5;
-        } else {
-            padding = diff * 0.01;
-        }
-        if (_typeof(config.axis_x_padding) === 'object' && notEmpty(config.axis_x_padding)) {
-            paddingLeft = isValue(config.axis_x_padding.left) ? config.axis_x_padding.left : padding;
-            paddingRight = isValue(config.axis_x_padding.right) ? config.axis_x_padding.right : padding;
-        } else if (typeof config.axis_x_padding === 'number') {
-            paddingLeft = paddingRight = config.axis_x_padding;
-        } else {
-            paddingLeft = paddingRight = padding;
-        }
-        return { left: paddingLeft, right: paddingRight };
-    };
-    c3_chart_internal_fn.getXDomain = function (targets) {
-        var $$ = 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 = $$.isTimeSeries() ? new Date(lastX.getTime() + padding.right) : lastX + padding.right;
-        }
-        return [min, max];
-    };
-    c3_chart_internal_fn.updateXDomain = function (targets, withUpdateXDomain, withUpdateOrgXDomain, withTrim, domain) {
-        var $$ = 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 $$.x.domain();
-    };
-    c3_chart_internal_fn.trimXDomain = function (domain) {
-        var zoomDomain = this.getZoomDomain(),
-            min = zoomDomain[0],
-            max = zoomDomain[1];
-        if (domain[0] <= min) {
-            domain[1] = +domain[1] + (min - domain[0]);
-            domain[0] = min;
-        }
-        if (max <= domain[1]) {
-            domain[0] = +domain[0] - (domain[1] - max);
-            domain[1] = max;
-        }
-        return domain;
-    };
-
-    c3_chart_internal_fn.drag = function (mouse) {
-        var $$ = 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($$, !isSelected, shape, d, i);
-            }
-        });
-    };
-
-    c3_chart_internal_fn.dragstart = function (mouse) {
-        var $$ = 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);
-        $$.dragging = true;
-    };
-
-    c3_chart_internal_fn.dragend = function () {
-        var $$ = 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);
-        $$.dragging = false;
-    };
-
-    c3_chart_internal_fn.getYFormat = function (forArc) {
-        var $$ = 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);
-        };
-    };
-    c3_chart_internal_fn.yFormat = function (v) {
-        var $$ = this,
-            config = $$.config,
-            format = config.axis_y_tick_format ? config.axis_y_tick_format : $$.defaultValueFormat;
-        return format(v);
-    };
-    c3_chart_internal_fn.y2Format = function (v) {
-        var $$ = this,
-            config = $$.config,
-            format = config.axis_y2_tick_format ? config.axis_y2_tick_format : $$.defaultValueFormat;
-        return format(v);
-    };
-    c3_chart_internal_fn.defaultValueFormat = function (v) {
-        return isValue(v) ? +v : "";
-    };
-    c3_chart_internal_fn.defaultArcValueFormat = function (v, ratio) {
-        return (ratio * 100).toFixed(1) + '%';
-    };
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.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) {
-            $$.initGridLines();
-        }
-    };
-    c3_chart_internal_fn.initGridLines = function () {
-        var $$ = 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);
-        $$.xgridLines = d3.selectAll([]);
-    };
-    c3_chart_internal_fn.updateXGrid = function (withoutUpdate) {
-        var $$ = 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", $$.xgridAttr.opacity);
-        }
-        xgrid.exit().remove();
-    };
-
-    c3_chart_internal_fn.updateYGrid = function () {
-        var $$ = 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');
-    };
-
-    c3_chart_internal_fn.gridTextAnchor = function (d) {
-        return d.position ? d.position : "end";
-    };
-    c3_chart_internal_fn.gridTextDx = function (d) {
-        return d.position === 'start' ? 4 : d.position === 'middle' ? 0 : -4;
-    };
-    c3_chart_internal_fn.xGridTextX = function (d) {
-        return d.position === 'start' ? -this.height : d.position === 'middle' ? -this.height / 2 : 0;
-    };
-    c3_chart_internal_fn.yGridTextX = function (d) {
-        return d.position === 'start' ? 0 : d.position === 'middle' ? this.width / 2 : this.width;
-    };
-    c3_chart_internal_fn.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($$)).attr("y", yv).text(function (d) {
-            return d.text;
-        }).style("opacity", 1);
-        // exit
-        ygridLine.exit().transition().duration(duration).style("opacity", 0).remove();
-    };
-    c3_chart_internal_fn.redrawGrid = function (withTransition, transition) {
-        var $$ = 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($$)).attr("y", xv).text(function (d) {
-            return d.text;
-        }).style("opacity", 1)];
-    };
-    c3_chart_internal_fn.showXGridFocus = function (selectedData) {
-        var $$ = 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);
-        $$.smoothLines(focusEl, 'grid');
-    };
-    c3_chart_internal_fn.hideXGridFocus = function () {
-        this.main.select('line.' + CLASS.xgridFocus).style("visibility", "hidden");
-    };
-    c3_chart_internal_fn.updateXgridFocus = function () {
-        var $$ = 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);
-    };
-    c3_chart_internal_fn.generateGridData = function (type, scale) {
-        var $$ = this,
-            gridData = [],
-            xDomain,
-            firstYear,
-            lastYear,
-            i,
-            tickNum = $$.main.select("." + CLASS.axisX).selectAll('.tick').size();
-        if (type === 'year') {
-            xDomain = $$.getXDomain();
-            firstYear = xDomain[0].getFullYear();
-            lastYear = xDomain[1].getFullYear();
-            for (i = firstYear; i <= lastYear; i++) {
-                gridData.push(new Date(i + '-01-01 00:00:00'));
-            }
-        } else {
-            gridData = scale.ticks(10);
-            if (gridData.length > tickNum) {
-                // use only int
-                gridData = gridData.filter(function (d) {
-                    return ("" + d).indexOf('.') < 0;
-                });
-            }
-        }
-        return gridData;
-    };
-    c3_chart_internal_fn.getGridFilterToRemove = function (params) {
-        return params ? function (line) {
-            var found = false;
-            [].concat(params).forEach(function (param) {
-                if ('value' in param && line.value === param.value || 'class' in param && line['class'] === param['class']) {
-                    found = true;
-                }
-            });
-            return found;
-        } : function () {
-            return true;
-        };
-    };
-    c3_chart_internal_fn.removeGridLines = function (params, forX) {
-        var $$ = 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;
-        $$.main.select('.' + classLines).selectAll('.' + classLine).filter(toRemove).transition().duration(config.transition_duration).style('opacity', 0).remove();
-        if (forX) {
-            config.grid_x_lines = config.grid_x_lines.filter(toShow);
-        } else {
-            config.grid_y_lines = config.grid_y_lines.filter(toShow);
-        }
-    };
-
-    c3_chart_internal_fn.initEventRect = function () {
-        var $$ = 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));
-            }
-        }
-    };
-    c3_chart_internal_fn.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 () {});
-    };
-    c3_chart_internal_fn.getMousePosition = function (data) {
-        var $$ = this;
-        return [$$.x(data.x), $$.getYScale(data.id)(data.value)];
-    };
-    c3_chart_internal_fn.dispatchEvent = function (type, mouse) {
-        var $$ = this,
-            selector = '.' + CLASS.eventRect,
-            eventRect = $$.main.select(selector).node(),
-            box = eventRect.getBoundingClientRect(),
-            x = box.left + (mouse ? mouse[0] : 0),
-            y = box.top + (mouse ? mouse[1] : 0),
-            event = document.createEvent("MouseEvents");
-
-        event.initMouseEvent(type, true, true, window, 0, x, y, x, y, false, false, false, false, 0, null);
-        eventRect.dispatchEvent(event);
-    };
-
-    c3_chart_internal_fn.initLegend = function () {
-        var $$ = 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()
-        $$.updateLegendWithDefaults();
-    };
-    c3_chart_internal_fn.updateLegendWithDefaults = function () {
-        var $$ = this;
-        $$.updateLegend($$.mapToIds($$.data.targets), { withTransform: false, withTransitionForTransform: false, withTransition: false });
-    };
-    c3_chart_internal_fn.updateSizeForLegend = function (legendHeight, legendWidth) {
-        var $$ = 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
-        };
-    };
-    c3_chart_internal_fn.transformLegend = function (withTransition) {
-        var $$ = this;
-        (withTransition ? $$.legend.transition() : $$.legend).attr("transform", $$.getTranslate('legend'));
-    };
-    c3_chart_internal_fn.updateLegendStep = function (step) {
-        this.legendStep = step;
-    };
-    c3_chart_internal_fn.updateLegendItemWidth = function (w) {
-        this.legendItemWidth = w;
-    };
-    c3_chart_internal_fn.updateLegendItemHeight = function (h) {
-        this.legendItemHeight = h;
-    };
-    c3_chart_internal_fn.getLegendWidth = function () {
-        var $$ = this;
-        return $$.config.legend_show ? $$.isLegendRight || $$.isLegendInset ? $$.legendItemWidth * ($$.legendStep + 1) : $$.currentWidth : 0;
-    };
-    c3_chart_internal_fn.getLegendHeight = function () {
-        var $$ = this,
-            h = 0;
-        if ($$.config.legend_show) {
-            if ($$.isLegendRight) {
-                h = $$.currentHeight;
-            } else {
-                h = Math.max(20, $$.legendItemHeight) * ($$.legendStep + 1);
-            }
-        }
-        return h;
-    };
-    c3_chart_internal_fn.opacityForLegend = function (legendItem) {
-        return legendItem.classed(CLASS.legendItemHidden) ? null : 1;
-    };
-    c3_chart_internal_fn.opacityForUnfocusedLegend = function (legendItem) {
-        return legendItem.classed(CLASS.legendItemHidden) ? null : 0.3;
-    };
-    c3_chart_internal_fn.toggleFocusLegend = function (targetIds, focus) {
-        var $$ = 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));
-        });
-    };
-    c3_chart_internal_fn.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));
-        });
-    };
-    c3_chart_internal_fn.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));
-        });
-    };
-    c3_chart_internal_fn.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');
-    };
-    c3_chart_internal_fn.clearLegendItemTextBoxCache = function () {
-        this.legendItemTextBox = {};
-    };
-    c3_chart_internal_fn.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);
-        $$.legendHasRendered = true;
-    };
-
-    c3_chart_internal_fn.initRegion = function () {
-        var $$ = this;
-        $$.region = $$.main.append('g').attr("clip-path", $$.clipPath).attr("class", CLASS.regions);
-    };
-    c3_chart_internal_fn.updateRegion = function (duration) {
-        var $$ = 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($$));
-        mainRegion.exit().transition().duration(duration).style("opacity", 0).remove();
-    };
-    c3_chart_internal_fn.redrawRegion = function (withTransition, transition) {
-        var $$ = 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($$)).style("fill-opacity", function (d) {
-            return isValue(d.opacity) ? d.opacity : 0.1;
-        })];
-    };
-    c3_chart_internal_fn.regionX = function (d) {
-        var $$ = 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;
-    };
-    c3_chart_internal_fn.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() ? $$.parseDate(d.start) : d.start) : 0 : 0;
-        }
-        return yPos;
-    };
-    c3_chart_internal_fn.regionWidth = function (d) {
-        var $$ = 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) : $$.width;
-        }
-        return end < start ? 0 : end - start;
-    };
-    c3_chart_internal_fn.regionHeight = function (d) {
-        var $$ = 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;
-    };
-    c3_chart_internal_fn.isRegionOnX = function (d) {
-        return !d.axis || d.axis === 'x';
-    };
-
-    c3_chart_internal_fn.getScale = function (min, max, forTimeseries) {
-        return (forTimeseries ? this.d3.scaleTime() : this.d3.scaleLinear()).range([min, max]);
-    };
-    c3_chart_internal_fn.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 ($$.isCategorized()) {
-            scale.domain = function (domain) {
-                if (!arguments.length) {
-                    domain = this.orgDomain();
-                    return [domain[0], domain[1] + 1];
-                }
-                _scale.domain(domain);
-                return scale;
-            };
-        }
-        return scale;
-    };
-    c3_chart_internal_fn.getY = function (min, max, domain) {
-        var scale = this.getScale(min, max, this.isTimeSeriesY());
-        if (domain) {
-            scale.domain(domain);
-        }
-        return scale;
-    };
-    c3_chart_internal_fn.getYScale = function (id) {
-        return this.axis.getId(id) === 'y2' ? this.y2 : this.y;
-    };
-    c3_chart_internal_fn.getSubYScale = function (id) {
-        return this.axis.getId(id) === 'y2' ? this.subY2 : this.subY;
-    };
-    c3_chart_internal_fn.updateScales = function () {
-        var $$ = 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) {
-            $$.updateArc();
-        }
-    };
-
-    c3_chart_internal_fn.selectPoint = function (target, d, i) {
-        var $$ = 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 $$.pointSelectR(d) * 1.4;
-        }).transition().duration(100).attr("r", r);
-    };
-    c3_chart_internal_fn.unselectPoint = function (target, d, i) {
-        var $$ = 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();
-    };
-    c3_chart_internal_fn.togglePoint = function (selected, target, d, i) {
-        selected ? this.selectPoint(target, d, i) : this.unselectPoint(target, d, i);
-    };
-    c3_chart_internal_fn.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);
-            });
-        }
-    };
-    c3_chart_internal_fn.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 $$.color(d);
-            });
-        }
-    };
-    c3_chart_internal_fn.togglePath = function (selected, target, d, i) {
-        selected ? this.selectPath(target, d, i) : this.unselectPath(target, d, i);
-    };
-    c3_chart_internal_fn.getToggle = function (that, d) {
-        var $$ = 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 = $$.togglePath;
-        }
-        return toggle;
-    };
-    c3_chart_internal_fn.toggleShape = function (that, d, i) {
-        var $$ = 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);
-        }
-    };
-
-    c3_chart_internal_fn.initBar = function () {
-        var $$ = this;
-        $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartBars);
-    };
-    c3_chart_internal_fn.updateTargetsForBar = function (targets) {
-        var $$ = this,
-            config = $$.config,
-            mainBars,
-            mainBarEnter,
-            classChartBar = $$.classChartBar.bind($$),
-            classBars = $$.classBars.bind($$),
-            classFocus = $$.classFocus.bind($$);
-        mainBars = $$.main.select('.' + CLASS.chartBars).selectAll('.' + CLASS.chartBar).data(targets).attr('class', function (d) {
-            return classChartBar(d) + classFocus(d);
-        });
-        mainBarEnter = mainBars.enter().append('g').attr('class', classChartBar).style("pointer-events", "none");
-        // Bars for each data
-        mainBarEnter.append('g').attr("class", classBars).style("cursor", function (d) {
-            return config.data_selection_isselectable(d) ? "pointer" : null;
-        });
-    };
-    c3_chart_internal_fn.updateBar = function (durationForExit) {
-        var $$ = 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);
-        $$.mainBar = mainBarEnter.merge(mainBar).style("opacity", initialOpacity);
-        mainBar.exit().transition().duration(durationForExit).style("opacity", 0);
-    };
-    c3_chart_internal_fn.redrawBar = function (drawBar, withTransition, transition) {
-        return [(withTransition ? this.mainBar.transition(transition) : this.mainBar).attr('d', drawBar).style("stroke", this.color).style("fill", this.color).style("opacity", 1)];
-    };
-    c3_chart_internal_fn.getBarW = function (axis, barTargetsNum) {
-        var $$ = this,
-            config = $$.config,
-            w = typeof config.bar_width === 'number' ? config.bar_width : barTargetsNum ? axis.tickInterval() * config.bar_width_ratio / barTargetsNum : 0;
-        return config.bar_width_max && w > config.bar_width_max ? config.bar_width_max : w;
-    };
-    c3_chart_internal_fn.getBars = function (i, id) {
-        var $$ = this;
-        return (id ? $$.main.selectAll('.' + CLASS.bars + $$.getTargetSelectorSuffix(id)) : $$.main).selectAll('.' + CLASS.bar + (isValue(i) ? '-' + i : ''));
-    };
-    c3_chart_internal_fn.expandBars = function (i, id, reset) {
-        var $$ = this;
-        if (reset) {
-            $$.unexpandBars();
-        }
-        $$.getBars(i, id).classed(CLASS.EXPANDED, true);
-    };
-    c3_chart_internal_fn.unexpandBars = function (i) {
-        var $$ = this;
-        $$.getBars(i).classed(CLASS.EXPANDED, false);
-    };
-    c3_chart_internal_fn.generateDrawBar = function (barIndices, isSub) {
-        var $$ = this,
-            config = $$.config,
-            getPoints = $$.generateGetBarPoints(barIndices, isSub);
-        return function (d, i) {
-            // 4 points that make a bar
-            var points = getPoints(d, i);
-
-            // switch points if axis is rotated, not applicable for sub chart
-            var indexX = config.axis_rotated ? 1 : 0;
-            var indexY = config.axis_rotated ? 0 : 1;
-
-            var path = 'M ' + points[0][indexX] + ',' + points[0][indexY] + ' ' + 'L' + points[1][indexX] + ',' + points[1][indexY] + ' ' + 'L' + points[2][indexX] + ',' + points[2][indexY] + ' ' + 'L' + points[3][indexX] + ',' + points[3][indexY] + ' ' + 'z';
-
-            return path;
-        };
-    };
-    c3_chart_internal_fn.generateGetBarPoints = function (barIndices, isSub) {
-        var $$ = 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]];
-        };
-    };
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.getShapeIndices = function (typeFilter) {
-        var $$ = this,
-            config = $$.config,
-            indices = {},
-            i = 0,
-            j,
-            k;
-        $$.filterTargetsToShow($$.data.targets.filter(typeFilter, $$)).forEach(function (d) {
-            for (j = 0; j < config.data_groups.length; j++) {
-                if (config.data_groups[j].indexOf(d.id) < 0) {
-                    continue;
-                }
-                for (k = 0; k < config.data_groups[j].length; k++) {
-                    if (config.data_groups[j][k] in indices) {
-                        indices[d.id] = indices[config.data_groups[j][k]];
-                        break;
-                    }
-                }
-            }
-            if (isUndefined(indices[d.id])) {
-                indices[d.id] = i++;
-            }
-        });
-        indices.__max__ = i - 1;
-        return indices;
-    };
-    c3_chart_internal_fn.getShapeX = function (offset, targetsNum, indices, isSub) {
-        var $$ = 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;
-        };
-    };
-    c3_chart_internal_fn.getShapeY = function (isSub) {
-        var $$ = this;
-        return function (d) {
-            var scale = isSub ? $$.getSubYScale(d.id) : $$.getYScale(d.id);
-            return scale(d.value);
-        };
-    };
-    c3_chart_internal_fn.getShapeOffset = function (typeFilter, indices, isSub) {
-        var $$ = 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;
-        };
-    };
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.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
-        },
-            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;
-    };
-
-    c3_chart_internal_fn.initLine = function () {
-        var $$ = this;
-        $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartLines);
-    };
-    c3_chart_internal_fn.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();
-    };
-    c3_chart_internal_fn.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 $$.isStepType(d) ? 'crispEdges' : '';
-        }).attr('transform', null);
-        mainLine.exit().transition().duration(durationForExit).style('opacity', 0);
-    };
-    c3_chart_internal_fn.redrawLine = function (drawLine, withTransition, transition) {
-        return [(withTransition ? this.mainLine.transition(transition) : this.mainLine).attr("d", drawLine).style("stroke", this.color).style("opacity", 1)];
-    };
-    c3_chart_internal_fn.generateDrawLine = function (lineIndices, isSub) {
-        var $$ = 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";
-        };
-    };
-    c3_chart_internal_fn.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($$, d.id)(0),
-                offset = lineOffset(d, i) || y0,
-                // offset is for stacked area chart
-            posX = x(d),
-                posY = y(d);
-            // fix posY not to overflow opposite quadrant
-            if (config.axis_rotated) {
-                if (0 < d.value && posY < y0 || d.value < 0 && y0 < posY) {
-                    posY = y0;
-                }
-            }
-            // 1 point that marks the line position
-            return [[posX, posY - (y0 - offset)], [posX, posY - (y0 - offset)], // needed for compatibility
-            [posX, posY - (y0 - offset)], // needed for compatibility
-            [posX, posY - (y0 - offset)] // needed for compatibility
-            ];
-        };
-    };
-
-    c3_chart_internal_fn.lineWithRegions = function (d, x, y, _regions) {
-        var $$ = 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;
-    };
-
-    c3_chart_internal_fn.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", $$.orgAreaOpacity);
-        mainArea.exit().transition().duration(durationForExit).style('opacity', 0);
-    };
-    c3_chart_internal_fn.redrawArea = function (drawArea, withTransition, transition) {
-        return [(withTransition ? this.mainArea.transition(transition) : this.mainArea).attr("d", drawArea).style("fill", this.color).style("opacity", this.orgAreaOpacity)];
-    };
-    c3_chart_internal_fn.generateDrawArea = function (areaIndices, isSub) {
-        var $$ = 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";
-        };
-    };
-    c3_chart_internal_fn.getAreaBaseValue = function () {
-        return 0;
-    };
-    c3_chart_internal_fn.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($$, d.id)(0),
-                offset = areaOffset(d, i) || y0,
-                // offset is for stacked area chart
-            posX = x(d),
-                posY = y(d);
-            // fix posY not to overflow opposite quadrant
-            if (config.axis_rotated) {
-                if (0 < d.value && posY < y0 || d.value < 0 && y0 < posY) {
-                    posY = y0;
-                }
-            }
-            // 1 point that marks the area position
-            return [[posX, offset], [posX, posY - (y0 - offset)], [posX, posY - (y0 - offset)], // needed for compatibility
-            [posX, offset] // needed for compatibility
-            ];
-        };
-    };
-
-    c3_chart_internal_fn.updateCircle = function (cx, cy) {
-        var $$ = 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($$));
-        mainCircle.exit().style("opacity", 0);
-    };
-    c3_chart_internal_fn.redrawCircle = function (cx, cy, withTransition, transition) {
-        var $$ = this,
-            selectedCircles = $$.main.selectAll('.' + CLASS.selectedCircle);
-        return [(withTransition ? $$.mainCircle.transition(transition) : $$.mainCircle).style('opacity', this.opacityForCircle.bind($$)).style("fill", $$.color).attr("cx", cx).attr("cy", cy), (withTransition ? selectedCircles.transition(transition) : selectedCircles).attr("cx", cx).attr("cy", cy)];
-    };
-    c3_chart_internal_fn.circleX = function (d) {
-        return d.x || d.x === 0 ? this.x(d.x) : null;
-    };
-    c3_chart_internal_fn.updateCircleY = function () {
-        var $$ = 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 $$.getYScale(d.id)(d.value);
-            };
-        }
-    };
-    c3_chart_internal_fn.getCircles = function (i, id) {
-        var $$ = this;
-        return (id ? $$.main.selectAll('.' + CLASS.circles + $$.getTargetSelectorSuffix(id)) : $$.main).selectAll('.' + CLASS.circle + (isValue(i) ? '-' + i : ''));
-    };
-    c3_chart_internal_fn.expandCircles = function (i, id, reset) {
-        var $$ = this,
-            r = $$.pointExpandedR.bind($$);
-        if (reset) {
-            $$.unexpandCircles();
-        }
-        $$.getCircles(i, id).classed(CLASS.EXPANDED, true).attr('r', r);
-    };
-    c3_chart_internal_fn.unexpandCircles = function (i) {
-        var $$ = this,
-            r = $$.pointR.bind($$);
-        $$.getCircles(i).filter(function () {
-            return $$.d3.select(this).classed(CLASS.EXPANDED);
-        }).classed(CLASS.EXPANDED, false).attr('r', r);
-    };
-    c3_chart_internal_fn.pointR = function (d) {
-        var $$ = this,
-            config = $$.config;
-        return $$.isStepType(d) ? 0 : isFunction(config.point_r) ? config.point_r(d) : config.point_r;
-    };
-    c3_chart_internal_fn.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);
-        }
-    };
-    c3_chart_internal_fn.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 : $$.pointR(d) * 4;
-    };
-    c3_chart_internal_fn.isWithinCircle = function (that, r) {
-        var d3 = this.d3,
-            mouse = d3.mouse(that),
-            d3_this = d3.select(that),
-            cx = +d3_this.attr("cx"),
-            cy = +d3_this.attr("cy");
-        return Math.sqrt(Math.pow(cx - mouse[0], 2) + Math.pow(cy - mouse[1], 2)) < r;
-    };
-    c3_chart_internal_fn.isWithinStep = function (that, y) {
-        return Math.abs(y - this.d3.mouse(that)[1]) < 30;
-    };
-
-    c3_chart_internal_fn.getCurrentWidth = function () {
-        var $$ = this,
-            config = $$.config;
-        return config.size_width ? config.size_width : $$.getParentWidth();
-    };
-    c3_chart_internal_fn.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);
-    };
-    c3_chart_internal_fn.getCurrentPaddingTop = function () {
-        var $$ = this,
-            config = $$.config,
-            padding = isValue(config.padding_top) ? config.padding_top : 0;
-        if ($$.title && $$.title.node()) {
-            padding += $$.getTitlePadding();
-        }
-        return padding;
-    };
-    c3_chart_internal_fn.getCurrentPaddingBottom = function () {
-        var config = this.config;
-        return isValue(config.padding_bottom) ? config.padding_bottom : 0;
-    };
-    c3_chart_internal_fn.getCurrentPaddingLeft = function (withoutRecompute) {
-        var $$ = 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));
-        }
-    };
-    c3_chart_internal_fn.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;
-        }
-    };
-
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.getParentWidth = function () {
-        return this.getParentRectValue('width');
-    };
-    c3_chart_internal_fn.getParentHeight = function () {
-        var h = this.selectChart.style('height');
-        return h.indexOf('px') > 0 ? +h.replace('px', '') : 0;
-    };
-
-    c3_chart_internal_fn.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;
-    };
-
-    c3_chart_internal_fn.getAxisWidthByAxisId = function (id, withoutRecompute) {
-        var $$ = this,
-            position = $$.axis.getLabelPositionById(id);
-        return $$.axis.getMaxTickWidth(id, withoutRecompute) + (position.isInner ? 20 : 40);
-    };
-    c3_chart_internal_fn.getHorizontalAxisHeight = function (axisId) {
-        var $$ = 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 + ($$.axis.getLabelPositionById(axisId).isInner ? 0 : 10) + (axisId === 'y2' ? -10 : 0);
-    };
-
-    c3_chart_internal_fn.initBrush = function (scale) {
-        var $$ = 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 $$.brush.updateScale(scale);
-    };
-    c3_chart_internal_fn.initSubchart = function () {
-        var $$ = 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 ? "" : $$.clipPathForXAxis);
-    };
-    c3_chart_internal_fn.initSubchartBrush = function () {
-        var $$ = this;
-        // Add extent rect for Brush
-        $$.initBrush($$.subX).updateExtent();
-        $$.context.select('.' + CLASS.brush).call($$.brush);
-    };
-    c3_chart_internal_fn.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 : $$.height2);
-        }
-    };
-    c3_chart_internal_fn.updateBarForSubchart = function (durationForExit) {
-        var $$ = 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($$));
-    };
-    c3_chart_internal_fn.redrawBarForSubchart = function (drawBarOnSub, withTransition, duration) {
-        (withTransition ? this.contextBar.transition(Math.random().toString()).duration(duration) : this.contextBar).attr('d', drawBarOnSub).style('opacity', 1);
-    };
-    c3_chart_internal_fn.updateLineForSubchart = function (durationForExit) {
-        var $$ = 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($$));
-    };
-    c3_chart_internal_fn.redrawLineForSubchart = function (drawLineOnSub, withTransition, duration) {
-        (withTransition ? this.contextLine.transition(Math.random().toString()).duration(duration) : this.contextLine).attr("d", drawLineOnSub).style('opacity', 1);
-    };
-    c3_chart_internal_fn.updateAreaForSubchart = function (durationForExit) {
-        var $$ = 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();
-        $$.contextArea = contextAreaEnter.merge(contextArea).style("opacity", 0);
-    };
-    c3_chart_internal_fn.redrawAreaForSubchart = function (drawAreaOnSub, withTransition, duration) {
-        (withTransition ? this.contextArea.transition(Math.random().toString()).duration(duration) : this.contextArea).attr("d", drawAreaOnSub).style("fill", this.color).style("opacity", this.orgAreaOpacity);
-    };
-    c3_chart_internal_fn.redrawSubchart = function (withSubchart, transitions, duration, durationForExit, areaIndices, barIndices, lineIndices) {
-        var $$ = 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);
-                $$.redrawAreaForSubchart(drawAreaOnSub, duration, duration);
-            }
-        }
-    };
-    c3_chart_internal_fn.redrawForBrush = function () {
-        var $$ = 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());
-    };
-    c3_chart_internal_fn.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", $$.getTranslate('subx'));
-    };
-    c3_chart_internal_fn.getDefaultSelection = function () {
-        var $$ = 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;
-    };
-
-    c3_chart_internal_fn.initText = function () {
-        var $$ = this;
-        $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartTexts);
-        $$.mainText = $$.d3.selectAll([]);
-    };
-    c3_chart_internal_fn.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);
-        });
-    };
-    c3_chart_internal_fn.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();
-    };
-    c3_chart_internal_fn.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))];
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.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($$, getPoints(d, i), d, this);
-        };
-    };
-    c3_chart_internal_fn.getXForText = function (points, d, textElement) {
-        var $$ = 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 = $$.width - box.width;
-            } else if (xPos < 0) {
-                xPos = 4;
-            }
-        }
-        return xPos;
-    };
-    c3_chart_internal_fn.getYForText = function (points, d, textElement) {
-        var $$ = 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;
-    };
-
-    c3_chart_internal_fn.initTitle = function () {
-        var $$ = this;
-        $$.title = $$.svg.append("text").text($$.config.title_text).attr("class", $$.CLASS.title);
-    };
-    c3_chart_internal_fn.redrawTitle = function () {
-        var $$ = this;
-        $$.title.attr("x", $$.xForTitle.bind($$)).attr("y", $$.yForTitle.bind($$));
-    };
-    c3_chart_internal_fn.xForTitle = function () {
-        var $$ = 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, $$.title.node()).width) / 2;
-        } else {
-            // left
-            x = config.title_padding.left;
-        }
-        return x;
-    };
-    c3_chart_internal_fn.yForTitle = function () {
-        var $$ = this;
-        return $$.config.title_padding.top + $$.getTextRect($$.title.node().textContent, $$.CLASS.title, $$.title.node()).height;
-    };
-    c3_chart_internal_fn.getTitlePadding = function () {
-        var $$ = this;
-        return $$.yForTitle() + $$.config.title_padding.bottom;
-    };
-
-    c3_chart_internal_fn.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));
-            $$.tooltip.style("top", config.tooltip_init_position.top).style("left", config.tooltip_init_position.left).style("display", "block");
-        }
-    };
-    c3_chart_internal_fn.getTooltipSortFunction = function () {
-        var $$ = 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() || $$.isOrderDesc()) {
-                ids = ids.reverse();
-            }
-
-            return function (a, b) {
-                return ids.indexOf(a.id) - ids.indexOf(b.id);
-            };
-        }
-    };
-    c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaultValueFormat, color) {
-        var $$ = 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>";
-    };
-    c3_chart_internal_fn.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 > $$.currentHeight) {
-                tooltipTop -= tHeight + 30;
-            }
-        }
-        if (tooltipTop < 0) {
-            tooltipTop = 0;
-        }
-        return { top: tooltipTop, left: tooltipLeft };
-    };
-    c3_chart_internal_fn.showTooltip = function (selectedData, element) {
-        var $$ = this,
-            config = $$.config;
-        var tWidth, tHeight, position;
-        var forArc = $$.hasArcType(),
-            dataToShow = selectedData.filter(function (d) {
-            return d && isValue(d.value);
-        }),
-            positionFunction = config.tooltip_position || c3_chart_internal_fn.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');
-    };
-    c3_chart_internal_fn.hideTooltip = function () {
-        this.tooltip.style("display", "none");
-    };
-
-    c3_chart_internal_fn.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;
-        }
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.hasArcType = function (targets) {
-        return this.hasType('pie', targets) || this.hasType('donut', targets) || this.hasType('gauge', targets);
-    };
-    c3_chart_internal_fn.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;
-    };
-    c3_chart_internal_fn.isStepType = function (d) {
-        var id = isString(d) ? d : d.id;
-        return ['step', 'area-step'].indexOf(this.config.data_types[id]) >= 0;
-    };
-    c3_chart_internal_fn.isSplineType = function (d) {
-        var id = isString(d) ? d : d.id;
-        return ['spline', 'area-spline'].indexOf(this.config.data_types[id]) >= 0;
-    };
-    c3_chart_internal_fn.isAreaType = function (d) {
-        var id = isString(d) ? d : d.id;
-        return ['area', 'area-spline', 'area-step'].indexOf(this.config.data_types[id]) >= 0;
-    };
-    c3_chart_internal_fn.isBarType = function (d) {
-        var id = isString(d) ? d : d.id;
-        return this.config.data_types[id] === 'bar';
-    };
-    c3_chart_internal_fn.isScatterType = function (d) {
-        var id = isString(d) ? d : d.id;
-        return this.config.data_types[id] === 'scatter';
-    };
-    c3_chart_internal_fn.isPieType = function (d) {
-        var id = isString(d) ? d : d.id;
-        return this.config.data_types[id] === 'pie';
-    };
-    c3_chart_internal_fn.isGaugeType = function (d) {
-        var id = isString(d) ? d : d.id;
-        return this.config.data_types[id] === 'gauge';
-    };
-    c3_chart_internal_fn.isDonutType = function (d) {
-        var id = isString(d) ? d : d.id;
-        return this.config.data_types[id] === 'donut';
-    };
-    c3_chart_internal_fn.isArcType = function (d) {
-        return this.isPieType(d) || this.isDonutType(d) || this.isGaugeType(d);
-    };
-    c3_chart_internal_fn.lineData = function (d) {
-        return this.isLineType(d) ? [d] : [];
-    };
-    c3_chart_internal_fn.arcData = function (d) {
-        return this.isArcType(d.data) ? [d] : [];
-    };
-    /* not used
-     function scatterData(d) {
-     return isScatterType(d) ? d.values : [];
-     }
-     */
-    c3_chart_internal_fn.barData = function (d) {
-        return this.isBarType(d) ? d.values : [];
-    };
-    c3_chart_internal_fn.lineOrScatterData = function (d) {
-        return this.isLineType(d) || this.isScatterType(d) ? d.values : [];
-    };
-    c3_chart_internal_fn.barOrLineData = function (d) {
-        return this.isBarType(d) || this.isLineType(d) ? d.values : [];
-    };
-
-    c3_chart_internal_fn.isSafari = function () {
-        var ua = window.navigator.userAgent;
-        return ua.indexOf('Safari') >= 0 && ua.indexOf('Chrome') < 0;
-    };
-    c3_chart_internal_fn.isChrome = function () {
-        var ua = window.navigator.userAgent;
-        return ua.indexOf('Chrome') >= 0;
-    };
-
-    c3_chart_internal_fn.initZoom = function () {
-        var $$ = this,
-            d3 = $$.d3,
-            config = $$.config,
-            startEvent;
-
-        $$.zoom = d3.zoom().on("start", function () {
-            var e = d3.event.sourceEvent;
-            if (e && e.type === "brush") {
-                return;
-            }
-            startEvent = e;
-            config.zoom_onzoomstart.call($$.api, e);
-        }).on("zoom", function () {
-            var e = d3.event.sourceEvent;
-            if (e && e.type === "brush") {
-                return;
-            }
-            $$.redrawForZoom.call($$);
-        }).on('end', function () {
-            var e = d3.event.sourceEvent;
-            if (e && e.type === "brush") {
-                return;
-            }
-            // if click, do nothing. otherwise, click interaction will be canceled.
-            if (e && startEvent.clientX === e.clientX && startEvent.clientY === e.clientY) {
-                return;
-            }
-            config.zoom_onzoomend.call($$.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 $$.zoom.updateExtent();
-    };
-    c3_chart_internal_fn.zoomTransform = function (range) {
-        var $$ = this,
-            s = [$$.x(range[0]), $$.x(range[1])];
-        return $$.d3.zoomIdentity.scale($$.width / (s[1] - s[0])).translate(-s[0], 0);
-    };
-
-    c3_chart_internal_fn.getZoomDomain = function () {
-        var $$ = this,
-            config = $$.config,
-            d3 = $$.d3,
-            min = d3.min([$$.orgXDomain[0], config.zoom_x_min]),
-            max = d3.max([$$.orgXDomain[1], config.zoom_x_max]);
-        return [min, max];
-    };
-    c3_chart_internal_fn.redrawForZoom = function () {
-        var $$ = this,
-            d3 = $$.d3,
-            config = $$.config,
-            zoom = $$.zoom,
-            x = $$.x;
-        if (!config.zoom_enabled) {
-            return;
-        }
-        if ($$.filterTargetsToShow($$.data.targets).length === 0) {
-            return;
-        }
-
-        zoom.update();
-
-        if ($$.isCategorized() && x.orgDomain()[0] === $$.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') {
-            $$.cancelClick = true;
-        }
-        config.zoom_onzoom.call($$.api, x.orgDomain());
-    };
-
-    return c3;
-
-})));
diff --git a/web/static/c3.min.css b/web/static/c3.min.css
deleted file mode 100644
index 3162ac8..0000000
--- a/web/static/c3.min.css
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/web/static/c3.min.js b/web/static/c3.min.js
deleted file mode 100644
index bf38311..0000000
--- a/web/static/c3.min.js
+++ /dev/null
@@ -1,2 +0,0 @@
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n,a,r,s,c,d,u,l=t;if(e)if(1===(n=o(e)?e():e))l=[t[0]];else if(2===n)l=[t[0],t[t.length-1]];else if(n>2){for(s=n-2,a=t[0],c=((r=t[t.length-1])-a)/(s+1),l=[a],d=0;d<s;d++)u=+a+c*(d+1),l.push(i?new Date(u):u);l.push(r)}return i||(l=l.sort(function(t,e){return t-e})),l},t.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}},t.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 b,T,A={version:"0.6.1"};function P(t,e,i){this.owner=t,A.chart.internal[e]=i}function C(t){var e=this.internal=new L(this);e.loadConfig(t),e.beforeInit(t),e.init(),e.afterInit(t),function 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s.onmouseover.call(a)}).on("mouseleave",function(){return s.onmouseout.call(a)}),a.config.svg_classname&&a.svg.attr("class",a.config.svg_classname),e=a.svg.append("defs"),a.clipChart=a.appendClip(e,a.clipId),a.clipXAxis=a.appendClip(e,a.clipIdForXAxis),a.clipYAxis=a.appendClip(e,a.clipIdForYAxis),a.clipGrid=a.appendClip(e,a.clipIdForGrid),a.clipSubchart=a.appendClip(e,a.clipIdForSubchart),a.updateSvgSize(),n=a.main=a.svg.append("g").attr("transform",a.getTranslate("main")),a.initPie&&a.initPie(),a.initSubchart&&a.initSubchart(),a.initTooltip&&a.initTooltip(),a.initLegend&&a.initLegend(),a.initTitle&&a.initTitle(),a.initZoom&&a.initZoom(),a.initSubchartBrush&&a.initSubchartBrush(),n.append("text").attr("class",i.text+" 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t=this,e=t.config,i=t.legend?t.getLegendHeight():0,n=t.legend?t.getLegendWidth():0,a=t.isLegendRight||t.isLegendInset?0:i,r=t.hasArcType(),s=e.axis_rotated||r?0:t.getHorizontalAxisHeight("x"),o=e.subchart_show&&!r?e.subchart_size_height+s:0;t.currentWidth=t.getCurrentWidth(),t.currentHeight=t.getCurrentHeight(),t.margin=e.axis_rotated?{top:t.getHorizontalAxisHeight("y2")+t.getCurrentPaddingTop(),right:r?0:t.getCurrentPaddingRight(),bottom:t.getHorizontalAxisHeight("y")+a+t.getCurrentPaddingBottom(),left:o+(r?0:t.getCurrentPaddingLeft())}:{top:4+t.getCurrentPaddingTop(),right:r?0:t.getCurrentPaddingRight(),bottom:s+o+a+t.getCurrentPaddingBottom(),left:r?0:t.getCurrentPaddingLeft()},t.margin2=e.axis_rotated?{top:t.margin.top,right:NaN,bottom:20+a,left:t.rotated_padding_left}:{top:t.currentHeight-o-a,right:NaN,bottom:s+a,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&&r&&(t.margin3.left=t.arcWidth/2+1.1*t.radiusExpanded)},T.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()},T.showTargets=function(){var t=this;t.svg.selectAll("."+i.target).filter(function(e){return t.isTargetToShow(e.id)}).transition().duration(t.config.transition_duration).style("opacity",1)},T.redraw=function(t,e){var n,a,r,s,o,c,d,u,l,h,g,f,p,_,y,m,S,w,v,b,T,A,P,C,L,V,G,E,O,I,R,k=this,D=k.main,F=k.d3,X=k.config,M=k.getShapeIndices(k.isAreaType),z=k.getShapeIndices(k.isBarType),H=k.getShapeIndices(k.isLineType),B=k.hasArcType(),Y=k.filterTargetsToShow(k.data.targets),N=k.xv.bind(k);if(n=x(t=t||{},"withY",!0),a=x(t,"withSubchart",!0),r=x(t,"withTransition",!0),c=x(t,"withTransform",!1),d=x(t,"withUpdateXDomain",!1),u=x(t,"withUpdateOrgXDomain",!1),l=x(t,"withTrimXDomain",!0),p=x(t,"withUpdateXAxis",d),h=x(t,"withLegend",!1),g=x(t,"withEventRect",!0),f=x(t,"withDimension",!0),s=x(t,"withTransitionForExit",r),o=x(t,"withTransitionForAxis",r),v=r?X.transition_duration:0,b=s?v:0,T=o?v:0,e=e||k.axis.generateTransitions(T),h&&X.legend_show?k.updateLegend(k.mapToIds(k.data.targets),t,e):f&&k.updateDimension(!0),k.isCategorized()&&0===Y.length&&k.x.domain([0,k.axes.x.selectAll(".tick").size()]),Y.length?(k.updateXDomain(Y,d,u,l),X.axis_x_tick_values||(V=k.axis.updateXAxisTickValues(Y))):(k.xAxis.tickValues([]),k.subXAxis.tickValues([])),X.zoom_rescale&&!t.flow&&(O=k.x.orgDomain()),k.y.domain(k.getYDomain(Y,"y",O)),k.y2.domain(k.getYDomain(Y,"y2",O)),!X.axis_y_tick_values&&X.axis_y_tick_count&&k.yAxis.tickValues(k.axis.generateTickValues(k.y.domain(),X.axis_y_tick_count)),!X.axis_y2_tick_values&&X.axis_y2_tick_count&&k.y2Axis.tickValues(k.axis.generateTickValues(k.y2.domain(),X.axis_y2_tick_count)),k.axis.redraw(T,B),k.axis.updateLabels(r),(d||p)&&Y.length)if(X.axis_x_tick_culling&&V){for(G=1;G<V.length;G++)if(V.length/G<X.axis_x_tick_culling_max){E=G;break}k.svg.selectAll("."+i.axisX+" 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window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL;default:return window.SVGPathSeg.PATHSEG_UNKNOWN}},n.prototype._nextCommandHelper=function(t,e){return("+"==t||"-"==t||"."==t||t>="0"&&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},n.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},n.prototype._parseNumber=function(){var t=0,e=0,i=1,n=0,a=1,r=1,s=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++,a=-1),!(this._currentIndex==this._endIndex||(this._string.charAt(this._currentIndex)<"0"||this._string.charAt(this._currentIndex)>"9")&&"."!=this._string.charAt(this._currentIndex))){for(var o=this._currentIndex;this._currentIndex<this._endIndex&&this._string.charAt(this._currentIndex)>="0"&&this._string.charAt(this._currentIndex)<="9";)this._currentIndex++;if(this._currentIndex!=o)for(var c=this._currentIndex-1,d=1;c>=o;)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"||this._string.charAt(this._currentIndex)>"9")return;for(;this._currentIndex<this._endIndex&&this._string.charAt(this._currentIndex)>="0"&&this._string.charAt(this._currentIndex)<="9";)i*=10,n+=(this._string.charAt(this._currentIndex)-"0")/i,this._currentIndex+=1}if(this._currentIndex!=s&&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++,r=-1),this._currentIndex>=this._endIndex||this._string.charAt(this._currentIndex)<"0"||this._string.charAt(this._currentIndex)>"9")return;for(;this._currentIndex<this._endIndex&&this._string.charAt(this._currentIndex)>="0"&&this._string.charAt(this._currentIndex)<="9";)t*=10,t+=this._string.charAt(this._currentIndex)-"0",this._currentIndex++}var u=e+n;if(u*=a,t&&(u*=Math.pow(10,r*t)),s!=this._currentIndex)return this._skipOptionalSpacesOrDelimiter(),u}},n.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}},n.prototype.parseSegment=function(){var t=this._string[this._currentIndex],i=this._pathSegTypeFromChar(t);if(i==window.SVGPathSeg.PATHSEG_UNKNOWN){if(this._previousCommand==window.SVGPathSeg.PATHSEG_UNKNOWN)return null;if((i=this._nextCommandHelper(t,this._previousCommand))==window.SVGPathSeg.PATHSEG_UNKNOWN)return null}else this._currentIndex++;switch(this._previousCommand=i,i){case window.SVGPathSeg.PATHSEG_MOVETO_REL:return new window.SVGPathSegMovetoRel(e,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_MOVETO_ABS:return new window.SVGPathSegMovetoAbs(e,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_REL:return new window.SVGPathSegLinetoRel(e,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_ABS:return new window.SVGPathSegLinetoAbs(e,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL:return new window.SVGPathSegLinetoHorizontalRel(e,this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS:return new window.SVGPathSegLinetoHorizontalAbs(e,this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL:return new window.SVGPathSegLinetoVerticalRel(e,this._parseNumber());case window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS:return new window.SVGPathSegLinetoVerticalAbs(e,this._parseNumber());case window.SVGPathSeg.PATHSEG_CLOSEPATH:return this._skipOptionalSpaces(),new window.SVGPathSegClosePath(e);case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL:var n={x1:this._parseNumber(),y1:this._parseNumber(),x2:this._parseNumber(),y2:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()};return new window.SVGPathSegCurvetoCubicRel(e,n.x,n.y,n.x1,n.y1,n.x2,n.y2);case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS:return n={x1:this._parseNumber(),y1:this._parseNumber(),x2:this._parseNumber(),y2:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoCubicAbs(e,n.x,n.y,n.x1,n.y1,n.x2,n.y2);case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL:return n={x2:this._parseNumber(),y2:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoCubicSmoothRel(e,n.x,n.y,n.x2,n.y2);case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS:return n={x2:this._parseNumber(),y2:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoCubicSmoothAbs(e,n.x,n.y,n.x2,n.y2);case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL:return n={x1:this._parseNumber(),y1:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoQuadraticRel(e,n.x,n.y,n.x1,n.y1);case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS:return n={x1:this._parseNumber(),y1:this._parseNumber(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegCurvetoQuadraticAbs(e,n.x,n.y,n.x1,n.y1);case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL:return new window.SVGPathSegCurvetoQuadraticSmoothRel(e,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS:return new window.SVGPathSegCurvetoQuadraticSmoothAbs(e,this._parseNumber(),this._parseNumber());case window.SVGPathSeg.PATHSEG_ARC_REL:return n={x1:this._parseNumber(),y1:this._parseNumber(),arcAngle:this._parseNumber(),arcLarge:this._parseArcFlag(),arcSweep:this._parseArcFlag(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegArcRel(e,n.x,n.y,n.x1,n.y1,n.arcAngle,n.arcLarge,n.arcSweep);case window.SVGPathSeg.PATHSEG_ARC_ABS:return n={x1:this._parseNumber(),y1:this._parseNumber(),arcAngle:this._parseNumber(),arcLarge:this._parseArcFlag(),arcSweep:this._parseArcFlag(),x:this._parseNumber(),y:this._parseNumber()},new window.SVGPathSegArcAbs(e,n.x,n.y,n.x1,n.y1,n.arcAngle,n.arcLarge,n.arcSweep);default:throw"Unknown path seg type."}};var a=new i,r=new n(t);if(!r.initialCommandIsMoveTo())return[];for(;r.hasMoreData();){var s=r.parseSegment();if(!s)return[];a.appendSegment(s)}return a.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))}),b.axis=function(){},b.axis.labels=function(t){var e=this.internal;arguments.length&&(Object.keys(t).forEach(function(i){e.axis.setLabelText(i,t[i])}),e.axis.updateLabels())},b.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":n(t))?(s(t.x)&&(i.axis_x_max=t.x),s(t.y)&&(i.axis_y_max=t.y),s(t.y2)&&(i.axis_y2_max=t.y2)):i.axis_y_max=i.axis_y2_max=t,e.redraw({withUpdateOrgXDomain:!0,withUpdateXDomain:!0})},b.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 0===t?"undefined":n(t))?(s(t.x)&&(i.axis_x_min=t.x),s(t.y)&&(i.axis_y_min=t.y),s(t.y2)&&(i.axis_y2_min=t.y2)):i.axis_y_min=i.axis_y2_min=t,e.redraw({withUpdateOrgXDomain:!0,withUpdateXDomain:!0})},b.axis.range=function(t){if(!arguments.length)return{max:this.axis.max(),min:this.axis.min()};l(t.max)&&this.axis.max(t.max),l(t.min)&&this.axis.min(t.min)},b.category=function(t,e){var i=this.internal,n=i.config;return arguments.length>1&&(n.axis_x_categories[t]=e,i.redraw()),n.axis_x_categories[t]},b.categories=function(t){var e=this.internal,i=e.config;return arguments.length?(i.axis_x_categories=t,e.redraw(),i.axis_x_categories):i.axis_x_categories},b.resize=function(t){var e=this.internal.config;e.size_width=t?t.width:null,e.size_height=t?t.height:null,this.flush()},b.flush=function(){this.internal.updateAndRedraw({withLegend:!0,withTransition:!1,withTransitionForTransform:!1})},b.destroy=function(){var t=this.internal;if(window.clearInterval(t.intervalForObserveInserted),void 0!==t.resizeTimeout&&window.clearTimeout(t.resizeTimeout),window.detachEvent)window.detachEvent("onresize",t.resizeIfElementDisplayed);else if(window.removeEventListener)window.removeEventListener("resize",t.resizeIfElementDisplayed);else{var e=window.onresize;e&&e.add&&e.remove&&e.remove(t.resizeFunction)}return 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r,s,o,c,d,u,l,h,g,p,_,x=t.targets,y=t.flow,m=t.drawBar,S=t.drawLine,w=t.drawArea,v=t.cx,b=t.cy,T=t.xv,A=t.xForText,P=t.yForText,C=t.duration,L=y.index,V=y.length,G=e.getValueOnIndex(e.data.targets[0].values,L),E=e.getValueOnIndex(e.data.targets[0].values,L+V),O=e.x.domain(),I=y.duration||C,R=y.done||function(){},k=e.generateWait();e.flowing=!0,e.data.targets.forEach(function(t){t.values.splice(0,V)}),o=e.updateXDomain(x,!0,!0),e.updateXGrid&&e.updateXGrid(!0),c=e.xgrid||a.selectAll([]),d=e.xgridLines||a.selectAll([]),u=e.mainRegion||a.selectAll([]),l=e.mainText||a.selectAll([]),h=e.mainBar||a.selectAll([]),g=e.mainLine||a.selectAll([]),p=e.mainArea||a.selectAll([]),_=e.mainCircle||a.selectAll([]),y.orgDataCount?r=1===y.orgDataCount||(G&&G.x)===(E&&E.x)?e.x(O[0])-e.x(o[0]):e.isTimeSeries()?e.x(O[0])-e.x(o[0]):e.x(G.x)-e.x(E.x):1!==e.data.targets[0].values.length?r=e.x(O[0])-e.x(o[0]):e.isTimeSeries()?(G=e.getValueOnIndex(e.data.targets[0].values,0),E=e.getValueOnIndex(e.data.targets[0].values,e.data.targets[0].values.length-1),r=e.x(G.x)-e.x(E.x)):r=f(o)/2,s="translate("+r+",0) 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t,a=[],r=[];if(V){for(t=0;t<V;t++)a.push("."+i.shape+"-"+(L+t)),r.push("."+i.text+"-"+(L+t));e.svg.selectAll("."+i.shapes).selectAll(a).remove(),e.svg.selectAll("."+i.texts).selectAll(r).remove(),e.svg.select("."+i.xgrid).remove()}c.attr("transform",null).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),d.attr("transform",null),d.select("line").attr("x1",n.axis_rotated?0:T).attr("x2",n.axis_rotated?e.width:T),d.select("text").attr("x",n.axis_rotated?e.width:0).attr("y",T),h.attr("transform",null).attr("d",m),g.attr("transform",null).attr("d",S),p.attr("transform",null).attr("d",w),_.attr("transform",null).attr("cx",v).attr("cy",b),l.attr("transform",null).attr("x",A).attr("y",P).style("fill-opacity",e.opacityForText.bind(e)),u.attr("transform",null),u.filter(e.isRegionOnX).attr("x",e.regionX.bind(e)).attr("width",e.regionWidth.bind(e)),R(),e.flowing=!1})}},b.focus=function(t){var e,n=this.internal;t=n.mapToTargetIds(t),e=n.svg.selectAll(n.selectorTargets(t.filter(n.isTargetToShow,n))),this.revert(),this.defocus(),e.classed(i.focused,!0).classed(i.defocused,!1),n.hasArcType()&&n.expandArc(t),n.toggleFocusLegend(t,!0),n.focusedTargetIds=t,n.defocusedTargetIds=n.defocusedTargetIds.filter(function(e){return t.indexOf(e)<0})},b.defocus=function(t){var e=this.internal;t=e.mapToTargetIds(t),e.svg.selectAll(e.selectorTargets(t.filter(e.isTargetToShow,e))).classed(i.focused,!1).classed(i.defocused,!0),e.hasArcType()&&e.unexpandArc(t),e.toggleFocusLegend(t,!1),e.focusedTargetIds=e.focusedTargetIds.filter(function(e){return t.indexOf(e)<0}),e.defocusedTargetIds=t},b.revert=function(t){var e=this.internal;t=e.mapToTargetIds(t),e.svg.selectAll(e.selectorTargets(t)).classed(i.focused,!1).classed(i.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(i.legendItemFocused)}).classed(i.legendItemFocused,!1)),e.focusedTargetIds=[],e.defocusedTargetIds=[]},b.xgrids=function(t){var e=this.internal,i=e.config;return t?(i.grid_x_lines=t,e.redrawWithoutRescale(),i.grid_x_lines):i.grid_x_lines},b.xgrids.add=function(t){var e=this.internal;return this.xgrids(e.config.grid_x_lines.concat(t||[]))},b.xgrids.remove=function(t){this.internal.removeGridLines(t,!0)},b.ygrids=function(t){var e=this.internal,i=e.config;return t?(i.grid_y_lines=t,e.redrawWithoutRescale(),i.grid_y_lines):i.grid_y_lines},b.ygrids.add=function(t){var e=this.internal;return this.ygrids(e.config.grid_y_lines.concat(t||[]))},b.ygrids.remove=function(t){this.internal.removeGridLines(t,!1)},b.groups=function(t){var e=this.internal,i=e.config;return u(t)?i.data_groups:(i.data_groups=t,e.redraw(),i.data_groups)},b.legend=function(){},b.legend.show=function(t){var e=this.internal;e.showLegend(e.mapToTargetIds(t)),e.updateAndRedraw({withLegend:!0})},b.legend.hide=function(t){var e=this.internal;e.hideLegend(e.mapToTargetIds(t)),e.updateAndRedraw({withLegend:!0})},b.load=function(t){var e=this.internal,i=e.config;t.xs&&e.addXs(t.xs),"names"in t&&b.data.names.bind(this)(t.names),"classes"in t&&Object.keys(t.classes).forEach(function(e){i.data_classes[e]=t.classes[e]}),"categories"in t&&e.isCategorized()&&(i.axis_x_categories=t.categories),"axes"in t&&Object.keys(t.axes).forEach(function(e){i.data_axes[e]=t.axes[e]}),"colors"in t&&Object.keys(t.colors).forEach(function(e){i.data_colors[e]=t.colors[e]}),"cacheIds"in t&&e.hasCaches(t.cacheIds)?e.load(e.getCaches(t.cacheIds),t.done):"unload"in t?e.unload(e.mapToTargetIds("boolean"==typeof t.unload&&t.unload?null:t.unload),function(){e.loadFromArgs(t)}):e.loadFromArgs(t)},b.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()})},b.regions=function(t){var e=this.internal,i=e.config;return t?(i.regions=t,e.redrawWithoutRescale(),i.regions):i.regions},b.regions.add=function(t){var e=this.internal,i=e.config;return t?(i.regions=i.regions.concat(t),e.redrawWithoutRescale(),i.regions):i.regions},b.regions.remove=function(t){var e,n,a,r=this.internal,s=r.config;return t=t||{},e=r.getOption(t,"duration",s.transition_duration),n=r.getOption(t,"classes",[i.region]),a=r.main.select("."+i.regions).selectAll(n.map(function(t){return"."+t})),(e?a.transition().duration(e):a).style("opacity",0).remove(),s.regions=s.regions.filter(function(t){var e=!1;return!t.class||(t.class.split(" ").forEach(function(t){n.indexOf(t)>=0&&(e=!0)}),!e)}),s.regions},b.selected=function(t){var e=this.internal,n=e.d3;return n.merge(e.main.selectAll("."+i.shapes+e.getTargetSelectorSuffix(t)).selectAll("."+i.shape).filter(function(){return n.select(this).classed(i.SELECTED)}).map(function(t){return t.map(function(t){var e=t.__data__;return e.data?e.data:e})}))},b.select=function(t,e,n){var a=this.internal,r=a.d3,s=a.config;s.data_selection_enabled&&a.main.selectAll("."+i.shapes).selectAll("."+i.shape).each(function(o,c){var d=r.select(this),u=o.data?o.data.id:o.id,h=a.getToggle(this,o).bind(a),g=s.data_selection_grouped||!t||t.indexOf(u)>=0,f=!e||e.indexOf(c)>=0,p=d.classed(i.SELECTED);d.classed(i.line)||d.classed(i.area)||(g&&f?s.data_selection_isselectable(o)&&!p&&h(!0,d.classed(i.SELECTED,!0),o,c):l(n)&&n&&p&&h(!1,d.classed(i.SELECTED,!1),o,c))})},b.unselect=function(t,e){var n=this.internal,a=n.d3,r=n.config;r.data_selection_enabled&&n.main.selectAll("."+i.shapes).selectAll("."+i.shape).each(function(s,o){var c=a.select(this),d=s.data?s.data.id:s.id,u=n.getToggle(this,s).bind(n),l=r.data_selection_grouped||!t||t.indexOf(d)>=0,h=!e||e.indexOf(o)>=0,g=c.classed(i.SELECTED);c.classed(i.line)||c.classed(i.area)||l&&h&&r.data_selection_isselectable(s)&&g&&u(!1,c.classed(i.SELECTED,!1),s,o)})},b.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})},b.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})},b.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)})},b.tooltip=function(){},b.tooltip.show=function(t){var e,i,n=this.internal,a={};t.mouse?a=t.mouse:(t.data?i=t.data:void 0!==t.x&&(e=t.id?n.data.targets.filter(function(e){return e.id===t.id}):n.data.targets,i=n.filterByX(e,t.x).slice(0,1)[0]),a=i?n.getMousePosition(i):null),n.dispatchEvent("mousemove",a),n.config.tooltip_onshow.call(n,i)},b.tooltip.hide=function(){this.internal.dispatchEvent("mouseout",0),this.internal.config.tooltip_onhide.call(this)},b.transform=function(t,e){var i=this.internal,n=["pie","donut"].indexOf(t)>=0?{withTransform:!0}:null;i.transformTo(e,t,n)},T.transformTo=function(t,e,i){var n=this,a=!n.hasArcType(),r=i||{withTransitionForAxis:a};r.withTransitionForTransform=!1,n.transiting=!1,n.setTargetType(t,e),n.updateTargets(n.data.targets),n.updateAndRedraw(r)},b.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},b.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},b.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()},b.zoom.enable=function(t){var e=this.internal;e.config.zoom_enabled=t,e.updateAndRedraw()},b.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}))},b.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])},b.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])},b.zoom.range=function(t){if(!arguments.length)return{max:this.domain.max(),min:this.domain.min()};l(t.max)&&this.domain.max(t.max),l(t.min)&&this.domain.min(t.min)},T.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)},T.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)},T.updateArc=function(){var t=this;t.svgArc=t.getSvgArc(),t.svgArcExpanded=t.getSvgArcExpanded(),t.svgArcExpandedSub=t.getSvgArcExpanded(.98)},T.updateAngle=function(t){var e,i,n,a,r=this,s=r.config,o=!1,c=0;return s?(r.pie(r.filterTargetsToShow(r.data.targets)).forEach(function(e){o||e.data.id!==t.data.id||(o=!0,(t=e).index=c),c++}),isNaN(t.startAngle)&&(t.startAngle=0),isNaN(t.endAngle)&&(t.endAngle=t.startAngle),r.isGaugeType(t.data)&&(e=s.gauge_min,i=s.gauge_max,n=Math.PI*(s.gauge_fullCircle?2:1)/(i-e),a=t.value<e?0:t.value<i?t.value-e:i-e,t.startAngle=s.gauge_startingAngle,t.endAngle=t.startAngle+n*a),o?t:null):null},T.getSvgArc=function(){var t=this,e=t.hasType("gauge"),i=t.gaugeArcWidth/t.filterTargetsToShow(t.data.targets).length,n=t.d3.arc().outerRadius(function(n){return e?t.radius-i*n.index:t.radius}).innerRadius(function(n){return e?t.radius-i*(n.index+1):t.innerRadius}),a=function(e,i){var a;return i?n(e):(a=t.updateAngle(e))?n(a):"M 0 0"};return a.centroid=n.centroid,a},T.getSvgArcExpanded=function(t){t=t||1;var e=this,i=e.hasType("gauge"),n=e.gaugeArcWidth/e.filterTargetsToShow(e.data.targets).length,a=Math.min(e.radiusExpanded*t-e.radius,.8*n-100*(1-t)),r=e.d3.arc().outerRadius(function(r){return i?e.radius-n*r.index+a:e.radiusExpanded*t}).innerRadius(function(t){return i?e.radius-n*(t.index+1):e.innerRadius});return function(t){var i=e.updateAngle(t);return i?r(i):"M 0 0"}},T.getArc=function(t,e,i){return i||this.isArcType(t.data)?this.svgArc(t,e):"M 0 0"},T.transformForArcLabel=function(t){var e,i,n,a,r,s=this,c=s.config,d=s.updateAngle(t),u="",l=s.hasType("gauge");if(d&&!l)e=this.svgArc.centroid(d),i=isNaN(e[0])?0:e[0],n=isNaN(e[1])?0:e[1],a=Math.sqrt(i*i+n*n),u="translate("+i*(r=s.hasType("donut")&&c.donut_label_ratio?o(c.donut_label_ratio)?c.donut_label_ratio(t,s.radius,a):c.donut_label_ratio:s.hasType("pie")&&c.pie_label_ratio?o(c.pie_label_ratio)?c.pie_label_ratio(t,s.radius,a):c.pie_label_ratio:s.radius&&a?(36/s.radius>.375?1.175-36/s.radius:.8)*s.radius/a:0)+","+n*r+")";else if(d&&l&&s.filterTargetsToShow(s.data.targets).length>1){var h=Math.sin(d.endAngle-Math.PI/2);u="translate("+(i=Math.cos(d.endAngle-Math.PI/2)*(s.radiusExpanded+25))+","+(n=h*(s.radiusExpanded+15-Math.abs(10*h))+3)+")"}return u},T.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},T.convertToArcData=function(t){return this.addName({id:t.data.id,value:t.value,ratio:this.getArcRatio(t),index:t.index})},T.textForArcLabel=function(t){var e,i,n,a,r,s=this;return s.shouldShowArcLabel()?(i=(e=s.updateAngle(t))?e.value:null,n=s.getArcRatio(e),a=t.data.id,s.hasType("gauge")||s.meetsArcLabelThreshold(n)?(r=s.getArcLabelFormat())?r(i,n,a):s.defaultArcValueFormat(i,n):""):""},T.textForGaugeMinMax=function(t,e){var i=this.getGaugeLabelExtents();return i?i(t,e):t},T.expandArc=function(t){var e,n=this;n.transiting?e=window.setInterval(function(){n.transiting||(window.clearInterval(e),n.legend.selectAll(".c3-legend-item-focused").size()>0&&n.expandArc(t))},10):(t=n.mapToTargetIds(t),n.svg.selectAll(n.selectorTargets(t,"."+i.chartArc)).each(function(t){n.shouldExpand(t.data.id)&&n.d3.select(this).selectAll("path").transition().duration(n.expandDuration(t.data.id)).attr("d",n.svgArcExpanded).transition().duration(2*n.expandDuration(t.data.id)).attr("d",n.svgArcExpandedSub).each(function(t){n.isDonutType(t.data)})}))},T.unexpandArc=function(t){var e=this;e.transiting||(t=e.mapToTargetIds(t),e.svg.selectAll(e.selectorTargets(t,"."+i.chartArc)).selectAll("path").transition().duration(function(t){return e.expandDuration(t.data.id)}).attr("d",e.svgArc),e.svg.selectAll("."+i.arc))},T.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},T.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},T.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},T.meetsArcLabelThreshold=function(t){var e=this.config;return t>=(this.hasType("donut")?e.donut_label_threshold:e.pie_label_threshold)},T.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},T.getGaugeLabelExtents=function(){return this.config.gauge_label_extents},T.getArcTitle=function(){return this.hasType("donut")?this.config.donut_title:""},T.updateTargetsForArc=function(t){var e,n=this,a=n.main,r=n.classChartArc.bind(n),s=n.classArcs.bind(n),o=n.classFocus.bind(n);(e=a.select("."+i.chartArcs).selectAll("."+i.chartArc).data(n.pie(t)).attr("class",function(t){return r(t)+o(t.data)}).enter().append("g").attr("class",r)).append("g").attr("class",s),e.append("text").attr("dy",n.hasType("gauge")?"-.1em":".35em").style("opacity",0).style("text-anchor","middle").style("pointer-events","none")},T.initArc=function(){var t=this;t.arcs=t.main.select("."+i.chart).append("g").attr("class",i.chartArcs).attr("transform",t.getTranslate("arc")),t.arcs.append("text").attr("class",i.chartArcsTitle).style("text-anchor","middle").text(t.getArcTitle())},T.redrawArc=function(t,e,n){var a,r,s,o,c,d=this,u=d.d3,l=d.config,h=d.main,g=d.hasType("gauge");if(r=(a=h.selectAll("."+i.arcs).selectAll("."+i.arc).data(d.arcData.bind(d))).enter().append("path").attr("class",d.classArc.bind(d)).style("fill",function(t){return d.color(t.data)}).style("cursor",function(t){return l.interaction_enabled&&l.data_selection_isselectable(t)?"pointer":null}).each(function(t){d.isGaugeType(t.data)&&(t.startAngle=t.endAngle=l.gauge_startingAngle),this._current=t}).merge(a),g&&(c=(o=h.selectAll("."+i.arcs).selectAll("."+i.arcLabelLine).data(d.arcData.bind(d))).enter().append("rect").attr("class",function(t){return i.arcLabelLine+" "+i.target+" "+i.target+"-"+t.data.id}).merge(o),1===d.filterTargetsToShow(d.data.targets).length?c.style("display","none"):c.style("fill",function(t){return l.color_pattern.length>0?d.levelColor(t.data.values[0].value):d.color(t.data)}).style("display",l.gauge_labelLine_show?"":"none").each(function(t){var e=0,i=0,n=0,a="";if(d.hiddenTargetIds.indexOf(t.data.id)<0){var r=d.updateAngle(t),s=d.gaugeArcWidth/d.filterTargetsToShow(d.data.targets).length*(r.index+1),o=r.endAngle-Math.PI/2,c=d.radius-s,l=o-(0===c?0:1/c);e=d.radiusExpanded-d.radius+s,i=Math.cos(l)*c,n=Math.sin(l)*c,a="rotate("+180*o/Math.PI+", "+i+", "+n+")"}u.select(this).attr("x",i).attr("y",n).attr("width",e).attr("height",2).attr("transform",a).style("stroke-dasharray","0, "+(e+2)+", 0")})),r.attr("transform",function(t){return!d.isGaugeType(t.data)&&n?"scale(0)":""}).on("mouseover",l.interaction_enabled?function(t){var e,i;d.transiting||(e=d.updateAngle(t))&&(i=d.convertToArcData(e),d.expandArc(e.data.id),d.api.focus(e.data.id),d.toggleFocusLegend(e.data.id,!0),d.config.data_onmouseover(i,this))}:null).on("mousemove",l.interaction_enabled?function(t){var e,i=d.updateAngle(t);i&&(e=[d.convertToArcData(i)],d.showTooltip(e,this))}:null).on("mouseout",l.interaction_enabled?function(t){var e,i;d.transiting||(e=d.updateAngle(t))&&(i=d.convertToArcData(e),d.unexpandArc(e.data.id),d.api.revert(),d.revertLegend(),d.hideTooltip(),d.config.data_onmouseout(i,this))}:null).on("click",l.interaction_enabled?function(t,e){var i,n=d.updateAngle(t);n&&(i=d.convertToArcData(n),d.toggleShape&&d.toggleShape(this,i,e),d.config.data_onclick.call(d.api,i,this))}:null).each(function(){d.transiting=!0}).transition().duration(t).attrTween("d",function(t){var e,i=d.updateAngle(t);return i?(isNaN(this._current.startAngle)&&(this._current.startAngle=0),isNaN(this._current.endAngle)&&(this._current.endAngle=this._current.startAngle),e=u.interpolate(this._current,i),this._current=e(0),function(i){var n=e(i);return n.data=t.data,d.getArc(n,!0)}):function(){return"M 0 0"}}).attr("transform",n?"scale(1)":"").style("fill",function(t){return d.levelColor?d.levelColor(t.data.values[0].value):d.color(t.data.id)}).call(d.endall,function(){d.transiting=!1}),a.exit().transition().duration(e).style("opacity",0).remove(),h.selectAll("."+i.chartArc).select("text").style("opacity",0).attr("class",function(t){return d.isGaugeType(t.data)?i.gaugeValue:""}).text(d.textForArcLabel.bind(d)).attr("transform",d.transformForArcLabel.bind(d)).style("font-size",function(t){return d.isGaugeType(t.data)&&1===d.filterTargetsToShow(d.data.targets).length?Math.round(d.radius/5)+"px":""}).transition().duration(t).style("opacity",function(t){return d.isTargetToShow(t.data.id)&&d.isArcType(t.data)?1:0}),h.select("."+i.chartArcsTitle).style("opacity",d.hasType("donut")||g?1:0),g){var f=0;(s=d.arcs.select("g."+i.chartArcsBackground).selectAll("path."+i.chartArcsBackground).data(d.data.targets)).enter().append("path"),s.attr("class",function(t,e){return i.chartArcsBackground+" "+i.chartArcsBackground+"-"+e}).attr("d",function(t){if(d.hiddenTargetIds.indexOf(t.id)>=0)return"M 0 0";var e={data:[{value:l.gauge_max}],startAngle:l.gauge_startingAngle,endAngle:-1*l.gauge_startingAngle*(l.gauge_fullCircle?Math.PI:1),index:f++};return d.getArc(e,!0,!0)}),s.exit().remove(),d.arcs.select("."+i.chartArcsGaugeUnit).attr("dy",".75em").text(l.gauge_label_show?l.gauge_units:""),d.arcs.select("."+i.chartArcsGaugeMin).attr("dx",-1*(d.innerRadius+(d.radius-d.innerRadius)/(l.gauge_fullCircle?1:2))+"px").attr("dy","1.2em").text(l.gauge_label_show?d.textForGaugeMinMax(l.gauge_min,!1):""),d.arcs.select("."+i.chartArcsGaugeMax).attr("dx",d.innerRadius+(d.radius-d.innerRadius)/(l.gauge_fullCircle?1:2)+"px").attr("dy","1.2em").text(l.gauge_label_show?d.textForGaugeMinMax(l.gauge_max,!0):"")}},T.initGauge=function(){var t=this.arcs;this.hasType("gauge")&&(t.append("g").attr("class",i.chartArcsBackground),t.append("text").attr("class",i.chartArcsGaugeUnit).style("text-anchor","middle").style("pointer-events","none"),t.append("text").attr("class",i.chartArcsGaugeMin).style("text-anchor","middle").style("pointer-events","none"),t.append("text").attr("class",i.chartArcsGaugeMax).style("text-anchor","middle").style("pointer-events","none"))},T.getGaugeLabelHeight=function(){return this.config.gauge_label_show?20:0},T.hasCaches=function(t){for(var e=0;e<t.length;e++)if(!(t[e]in this.cache))return!1;return!0},T.addCache=function(t,e){this.cache[t]=this.cloneTarget(e)},T.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},T.categoryName=function(t){var e=this.config;return t<e.axis_x_categories.length?e.axis_x_categories[t]:t},T.generateTargetClass=function(t){return t||0===t?("-"+t).replace(/\s/g,"-"):""},T.generateClass=function(t,e){return" "+t+" "+t+this.generateTargetClass(e)},T.classText=function(t){return this.generateClass(i.text,t.index)},T.classTexts=function(t){return this.generateClass(i.texts,t.id)},T.classShape=function(t){return this.generateClass(i.shape,t.index)},T.classShapes=function(t){return this.generateClass(i.shapes,t.id)},T.classLine=function(t){return this.classShape(t)+this.generateClass(i.line,t.id)},T.classLines=function(t){return this.classShapes(t)+this.generateClass(i.lines,t.id)},T.classCircle=function(t){return this.classShape(t)+this.generateClass(i.circle,t.index)},T.classCircles=function(t){return this.classShapes(t)+this.generateClass(i.circles,t.id)},T.classBar=function(t){return this.classShape(t)+this.generateClass(i.bar,t.index)},T.classBars=function(t){return this.classShapes(t)+this.generateClass(i.bars,t.id)},T.classArc=function(t){return this.classShape(t.data)+this.generateClass(i.arc,t.data.id)},T.classArcs=function(t){return this.classShapes(t.data)+this.generateClass(i.arcs,t.data.id)},T.classArea=function(t){return this.classShape(t)+this.generateClass(i.area,t.id)},T.classAreas=function(t){return this.classShapes(t)+this.generateClass(i.areas,t.id)},T.classRegion=function(t,e){return this.generateClass(i.region,e)+" "+("class"in t?t.class:"")},T.classEvent=function(t){return this.generateClass(i.eventRect,t.index)},T.classTarget=function(t){var e=this.config.data_classes[t],n="";return e&&(n=" "+i.target+"-"+e),this.generateClass(i.target,t)+n},T.classFocus=function(t){return this.classFocused(t)+this.classDefocused(t)},T.classFocused=function(t){return" "+(this.focusedTargetIds.indexOf(t.id)>=0?i.focused:"")},T.classDefocused=function(t){return" "+(this.defocusedTargetIds.indexOf(t.id)>=0?i.defocused:"")},T.classChartText=function(t){return i.chartText+this.classTarget(t.id)},T.classChartLine=function(t){return i.chartLine+this.classTarget(t.id)},T.classChartBar=function(t){return i.chartBar+this.classTarget(t.id)},T.classChartArc=function(t){return i.chartArc+this.classTarget(t.data.id)},T.getTargetSelectorSuffix=function(t){return this.generateTargetClass(t).replace(/([?!@#$%^&*()_=+,.<>'":;\[\]\/|~`{}\\])/g,"\\$1")},T.selectorTarget=function(t,e){return(e||"")+"."+i.target+this.getTargetSelectorSuffix(t)},T.selectorTargets=function(t,e){var i=this;return(t=t||[]).length?t.map(function(t){return i.selectorTarget(t,e)}):null},T.selectorLegend=function(t){return"."+i.legendItem+this.getTargetSelectorSuffix(t)},T.selectorLegends=function(t){var e=this;return t&&t.length?t.map(function(t){return e.selectorLegend(t)}):null},T.getClipPath=function(t){return"url("+(window.navigator.appVersion.toLowerCase().indexOf("msie 9.")>=0?"":document.URL.split("#")[0])+"#"+t+")"},T.appendClip=function(t,e){return t.append("clipPath").attr("id",e).append("rect")},T.getAxisClipX=function(t){var 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e=this;t.data?e.load(e.convertDataToTargets(t.data),t):t.url?e.convertUrlToData(t.url,t.mimeType,t.headers,t.keys,function(i){e.load(e.convertDataToTargets(i),t)}):t.json?e.load(e.convertDataToTargets(e.convertJsonToData(t.json,t.keys)),t):t.rows?e.load(e.convertDataToTargets(e.convertRowsToData(t.rows)),t):t.columns?e.load(e.convertDataToTargets(e.convertColumnsToData(t.columns)),t):e.load(null,t)},T.unload=function(t,e){var n=this;e||(e=function(){}),(t=t.filter(function(t){return n.hasTarget(n.data.targets,t)}))&&0!==t.length?(n.svg.selectAll(t.map(function(t){return n.selectorTarget(t)})).transition().style("opacity",0).remove().call(n.endall,e),t.forEach(function(t){n.withoutFadeIn[t]=!1,n.legend&&n.legend.selectAll("."+i.legendItem+n.getTargetSelectorSuffix(t)).remove(),n.data.targets=n.data.targets.filter(function(e){return e.id!==t})})):e()},T.getYDomainMin=function(t){var e,i,n,a,r,s,o=this,c=o.config,d=o.mapToIds(t),u=o.getValuesAsIdKeyed(t);if(c.data_groups.length>0)for(s=o.hasNegativeValueInTargets(t),e=0;e<c.data_groups.length;e++)if(0!==(a=c.data_groups[e].filter(function(t){return d.indexOf(t)>=0})).length)for(n=a[0],s&&u[n]&&u[n].forEach(function(t,e){u[n][e]=t<0?t:0}),i=1;i<a.length;i++)r=a[i],u[r]&&u[r].forEach(function(t,e){o.axis.getId(r)!==o.axis.getId(n)||!u[n]||s&&+t>0||(u[n][e]+=+t)});return o.d3.min(Object.keys(u).map(function(t){return o.d3.min(u[t])}))},T.getYDomainMax=function(t){var e,i,n,a,r,s,o=this,c=o.config,d=o.mapToIds(t),u=o.getValuesAsIdKeyed(t);if(c.data_groups.length>0)for(s=o.hasPositiveValueInTargets(t),e=0;e<c.data_groups.length;e++)if(0!==(a=c.data_groups[e].filter(function(t){return d.indexOf(t)>=0})).length)for(n=a[0],s&&u[n]&&u[n].forEach(function(t,e){u[n][e]=t>0?t:0}),i=1;i<a.length;i++)r=a[i],u[r]&&u[r].forEach(function(t,e){o.axis.getId(r)!==o.axis.getId(n)||!u[n]||s&&+t<0||(u[n][e]+=+t)});return 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l(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})})},T.getXDomainPadding=function(t){var e,i,a,r,o=this.config,c=t[1]-t[0];return i=this.isCategorized()?0:this.hasType("bar")?(e=this.getMaxDataCount())>1?c/(e-1)/2:.5:.01*c,"object"===n(o.axis_x_padding)&&_(o.axis_x_padding)?(a=s(o.axis_x_padding.left)?o.axis_x_padding.left:i,r=s(o.axis_x_padding.right)?o.axis_x_padding.right:i):a=r="number"==typeof o.axis_x_padding?o.axis_x_padding:i,{left:a,right:r}},T.getXDomain=function(t){var e=this,i=[e.getXDomainMin(t),e.getXDomainMax(t)],n=i[0],a=i[1],r=e.getXDomainPadding(i),s=0,o=0;return n-a!=0||e.isCategorized()||(e.isTimeSeries()?(n=new Date(.5*n.getTime()),a=new Date(1.5*a.getTime())):(n=0===n?1:.5*n,a=0===a?-1:1.5*a)),(n||0===n)&&(s=e.isTimeSeries()?new Date(n.getTime()-r.left):n-r.left),(a||0===a)&&(o=e.isTimeSeries()?new Date(a.getTime()+r.right):a+r.right),[s,o]},T.updateXDomain=function(t,e,i,n,a){var r=this,s=r.config;return i&&(r.x.domain(a||r.d3.extent(r.getXDomain(t))),r.orgXDomain=r.x.domain(),s.zoom_enabled&&r.zoom.update(),r.subX.domain(r.x.domain()),r.brush&&r.brush.updateScale(r.subX)),e&&r.x.domain(a||(!r.brush||r.brush.empty()?r.orgXDomain:r.brush.selectionAsValue())),n&&r.x.domain(r.trimXDomain(r.x.orgDomain())),r.x.domain()},T.trimXDomain=function(t){var e=this.getZoomDomain(),i=e[0],n=e[1];return t[0]<=i&&(t[1]=+t[1]+(i-t[0]),t[0]=i),n<=t[1]&&(t[0]=+t[0]-(t[1]-n),t[1]=n),t},T.drag=function(t){var e,n,a,r,s,o,c,d,u=this,l=u.config,h=u.main,g=u.d3;u.hasArcType()||l.data_selection_enabled&&l.data_selection_multiple&&(e=u.dragStart[0],n=u.dragStart[1],a=t[0],r=t[1],s=Math.min(e,a),o=Math.max(e,a),c=l.data_selection_grouped?u.margin.top:Math.min(n,r),d=l.data_selection_grouped?u.height:Math.max(n,r),h.select("."+i.dragarea).attr("x",s).attr("y",c).attr("width",o-s).attr("height",d-c),h.selectAll("."+i.shapes).selectAll("."+i.shape).filter(function(t){return l.data_selection_isselectable(t)}).each(function(t,e){var n,a,r,l,h,f,p=g.select(this),_=p.classed(i.SELECTED),x=p.classed(i.INCLUDED),y=!1;if(p.classed(i.circle))n=1*p.attr("cx"),a=1*p.attr("cy"),h=u.togglePoint,y=s<n&&n<o&&c<a&&a<d;else{if(!p.classed(i.bar))return;n=(f=S(this)).x,a=f.y,r=f.width,l=f.height,h=u.togglePath,y=!(o<n||n+r<s||d<a||a+l<c)}y^x&&(p.classed(i.INCLUDED,!x),p.classed(i.SELECTED,!_),h.call(u,!_,p,t,e))}))},T.dragstart=function(t){var e=this,n=e.config;e.hasArcType()||n.data_selection_enabled&&(e.dragStart=t,e.main.select("."+i.chart).append("rect").attr("class",i.dragarea).style("opacity",.1),e.dragging=!0)},T.dragend=function(){var t=this,e=t.config;t.hasArcType()||e.data_selection_enabled&&(t.main.select("."+i.dragarea).transition().duration(100).style("opacity",0).remove(),t.main.selectAll("."+i.shape).classed(i.INCLUDED,!1),t.dragging=!1)},T.getYFormat=function(t){var e=this,i=t&&!e.hasType("gauge")?e.defaultArcValueFormat:e.yFormat,n=t&&!e.hasType("gauge")?e.defaultArcValueFormat:e.y2Format;return function(t,a,r){return("y2"===e.axis.getId(r)?n:i).call(e,t,a)}},T.yFormat=function(t){var e=this.config;return(e.axis_y_tick_format?e.axis_y_tick_format:this.defaultValueFormat)(t)},T.y2Format=function(t){var e=this.config;return(e.axis_y2_tick_format?e.axis_y2_tick_format:this.defaultValueFormat)(t)},T.defaultValueFormat=function(t){return s(t)?+t:""},T.defaultArcValueFormat=function(t,e){return(100*e).toFixed(1)+"%"},T.dataLabelFormat=function(t){var e=this.config.data_labels,i=function(t){return s(t)?+t:""};return"function"==typeof e.format?e.format:"object"===n(e.format)?e.format[t]?!0===e.format[t]?i:e.format[t]:function(){return""}:i},T.initGrid=function(){var t=this,e=t.config,n=t.d3;t.grid=t.main.append("g").attr("clip-path",t.clipPathForGrid).attr("class",i.grid),e.grid_x_show&&t.grid.append("g").attr("class",i.xgrids),e.grid_y_show&&t.grid.append("g").attr("class",i.ygrids),e.grid_focus_show&&t.grid.append("g").attr("class",i.xgridFocus).append("line").attr("class",i.xgridFocus),t.xgrid=n.selectAll([]),e.grid_lines_front||t.initGridLines()},T.initGridLines=function(){var t=this,e=t.d3;t.gridLines=t.main.append("g").attr("clip-path",t.clipPathForGrid).attr("class",i.grid+" 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o=e.main.select("."+i.xgrids).selectAll("."+i.xgrid).data(r),c=o.enter().append("line").attr("class",i.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=c.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()},T.updateYGrid=function(){var t=this,e=t.config,n=t.yAxis.tickValues()||t.y.ticks(e.grid_y_ticks),a=t.main.select("."+i.ygrids).selectAll("."+i.ygrid).data(n),r=a.enter().append("line").attr("class",i.ygrid);t.ygrid=r.merge(a),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),a.exit().remove(),t.smoothLines(t.ygrid,"grid")},T.gridTextAnchor=function(t){return t.position?t.position:"end"},T.gridTextDx=function(t){return"start"===t.position?4:"middle"===t.position?0:-4},T.xGridTextX=function(t){return"start"===t.position?-this.height:"middle"===t.position?-this.height/2:0},T.yGridTextX=function(t){return"start"===t.position?0:"middle"===t.position?this.width/2:this.width},T.updateGrid=function(t){var e,n,a,r,s=this,o=s.main,c=s.config,d=s.xv.bind(s),u=s.yv.bind(s),l=s.xGridTextX.bind(s),h=s.yGridTextX.bind(s);s.grid.style("visibility",s.hasArcType()?"hidden":"visible"),o.select("line."+i.xgridFocus).style("visibility","hidden"),c.grid_x_show&&s.updateXGrid(),(n=(e=o.select("."+i.xgridLines).selectAll("."+i.xgridLine).data(c.grid_x_lines)).enter().append("g").attr("class",function(t){return i.xgridLine+(t.class?" 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i=this,n=i.config,a=i.xv.bind(i),r=i.xgridLines.select("line"),s=i.xgridLines.select("text");return[(t?r.transition(e):r).attr("x1",n.axis_rotated?0:a).attr("x2",n.axis_rotated?i.width:a).attr("y1",n.axis_rotated?a:0).attr("y2",n.axis_rotated?a:i.height).style("opacity",1),(t?s.transition(e):s).attr("x",n.axis_rotated?i.yGridTextX.bind(i):i.xGridTextX.bind(i)).attr("y",a).text(function(t){return t.text}).style("opacity",1)]},T.showXGridFocus=function(t){var e=this,n=e.config,a=t.filter(function(t){return t&&s(t.value)}),r=e.main.selectAll("line."+i.xgridFocus),o=e.xx.bind(e);n.tooltip_show&&(e.hasType("scatter")||e.hasArcType()||(r.style("visibility","visible").data([a[0]]).attr(n.axis_rotated?"y1":"x1",o).attr(n.axis_rotated?"y2":"x2",o),e.smoothLines(r,"grid")))},T.hideXGridFocus=function(){this.main.select("line."+i.xgridFocus).style("visibility","hidden")},T.updateXgridFocus=function(){var t=this.config;this.main.select("line."+i.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)},T.generateGridData=function(t,e){var n,a,r,s,o=[],c=this.main.select("."+i.axisX).selectAll(".tick").size();if("year"===t)for(a=(n=this.getXDomain())[0].getFullYear(),r=n[1].getFullYear(),s=a;s<=r;s++)o.push(new Date(s+"-01-01 00:00:00"));else(o=e.ticks(10)).length>c&&(o=o.filter(function(t){return(""+t).indexOf(".")<0}));return o},T.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}},T.removeGridLines=function(t,e){var n=this.config,a=this.getGridFilterToRemove(t),r=function(t){return!a(t)},s=e?i.xgridLines:i.ygridLines,o=e?i.xgridLine:i.ygridLine;this.main.select("."+s).selectAll("."+o).filter(a).transition().duration(n.transition_duration).style("opacity",0).remove(),e?n.grid_x_lines=n.grid_x_lines.filter(r):n.grid_y_lines=n.grid_y_lines.filter(r)},T.initEventRect=function(){var t=this,e=t.config;t.main.select("."+i.chart).append("g").attr("class",i.eventRects).style("fill-opacity",0),t.eventRect=t.main.select("."+i.eventRects).append("rect").attr("class",i.eventRect),e.zoom_enabled&&t.zoom&&(t.eventRect.call(t.zoom).on("dblclick.zoom",null),e.zoom_initialRange&&t.eventRect.transition().duration(0).call(t.zoom.transform,t.zoomTransform(e.zoom_initialRange)))},T.redrawEventRect=function(){var t,e,n=this,a=n.d3,r=n.config;function s(){n.svg.select("."+i.eventRect).style("cursor",null),n.hideXGridFocus(),n.hideTooltip(),n.unexpandCircles(),n.unexpandBars()}t=n.width,e=n.height,n.main.select("."+i.eventRects).style("cursor",r.zoom_enabled?r.axis_rotated?"ns-resize":"ew-resize":null),n.eventRect.attr("x",0).attr("y",0).attr("width",t).attr("height",e).on("mouseout",r.interaction_enabled?function(){r&&(n.hasArcType()||s())}:null).on("mousemove",r.interaction_enabled?function(){var t,e,o,c;n.dragging||n.hasArcType(t)||(t=n.filterTargetsToShow(n.data.targets),e=a.mouse(this),o=n.findClosestFromTargets(t,e),!n.mouseover||o&&o.id===n.mouseover.id||(r.data_onmouseout.call(n.api,n.mouseover),n.mouseover=void 0),o?(c=(n.isScatterType(o)||!r.tooltip_grouped?[o]:n.filterByX(t,o.x)).map(function(t){return n.addName(t)}),n.showTooltip(c,this),r.point_focus_expand_enabled&&(n.unexpandCircles(),c.forEach(function(t){n.expandCircles(t.index,t.id,!1)})),n.expandBars(o.index,o.id,!0),n.showXGridFocus(c),(n.isBarType(o.id)||n.dist(o,e)<r.point_sensitivity)&&(n.svg.select("."+i.eventRect).style("cursor","pointer"),n.mouseover||(r.data_onmouseover.call(n.api,o),n.mouseover=o))):s())}:null).on("click",r.interaction_enabled?function(){var t,e,s;n.hasArcType(t)||(t=n.filterTargetsToShow(n.data.targets),e=a.mouse(this),(s=n.findClosestFromTargets(t,e))&&(n.isBarType(s.id)||n.dist(s,e)<r.point_sensitivity)&&(n.isScatterType(s)||!r.data_selection_grouped?[s]:n.filterByX(t,s.x)).forEach(function(t){n.main.selectAll("."+i.shapes+n.getTargetSelectorSuffix(t.id)).selectAll("."+i.shape+"-"+t.index).each(function(){(r.data_selection_grouped||n.isWithinShape(this,t))&&(n.toggleShape(this,t,t.index),r.data_onclick.call(n.api,t,this))})}))}:null).call(r.interaction_enabled&&r.data_selection_draggable&&n.drag?a.drag().on("drag",function(){n.drag(a.mouse(this))}).on("start",function(){n.dragstart(a.mouse(this))}).on("end",function(){n.dragend()}):function(){})},T.getMousePosition=function(t){return[this.x(t.x),this.getYScale(t.id)(t.value)]},T.dispatchEvent=function(t,e){var 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i=this,n=i.config,a={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?a.top:i.currentHeight-t,right:NaN,bottom:0,left:i.isLegendRight?i.currentWidth-e:i.isLegendInset?a.left:0}},T.transformLegend=function(t){(t?this.legend.transition():this.legend).attr("transform",this.getTranslate("legend"))},T.updateLegendStep=function(t){this.legendStep=t},T.updateLegendItemWidth=function(t){this.legendItemWidth=t},T.updateLegendItemHeight=function(t){this.legendItemHeight=t},T.getLegendWidth=function(){var t=this;return t.config.legend_show?t.isLegendRight||t.isLegendInset?t.legendItemWidth*(t.legendStep+1):t.currentWidth:0},T.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},T.opacityForLegend=function(t){return t.classed(i.legendItemHidden)?null:1},T.opacityForUnfocusedLegend=function(t){return t.classed(i.legendItemHidden)?null:.3},T.toggleFocusLegend=function(t,e){var n=this;t=n.mapToTargetIds(t),n.legend.selectAll("."+i.legendItem).filter(function(e){return t.indexOf(e)>=0}).classed(i.legendItemFocused,e).transition().duration(100).style("opacity",function(){return(e?n.opacityForLegend:n.opacityForUnfocusedLegend).call(n,n.d3.select(this))})},T.revertLegend=function(){var t=this,e=t.d3;t.legend.selectAll("."+i.legendItem).classed(i.legendItemFocused,!1).transition().duration(100).style("opacity",function(){return t.opacityForLegend(e.select(this))})},T.showLegend=function(t){var 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v.levelColor(v.cache[t].values[0].value)}:v.color).attr("x1",u).attr("y1",g).attr("x2",h).attr("y2",g),w&&(p?w.transition():w).attr("height",v.getLegendHeight()-12).attr("width",P*(D+1)+10),v.legend.selectAll("."+i.legendItem).classed(i.legendItemHidden,function(t){return!v.isTargetToShow(t)}),v.updateLegendItemWidth(P),v.updateLegendItemHeight(C),v.updateLegendStep(D),v.updateSizes(),v.updateScales(),v.updateSvgSize(),v.transformAll(_,n),v.legendHasRendered=!0},T.initRegion=function(){this.region=this.main.append("g").attr("clip-path",this.clipPath).attr("class",i.regions)},T.updateRegion=function(t){var e=this,n=e.config;e.region.style("visibility",e.hasArcType()?"hidden":"visible");var 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t.xAxis.tickOffset()}),t.y=t.getY(t.yMin,t.yMax,i?e.axis_y_default:t.y.domain()),t.y2=t.getY(t.yMin,t.yMax,i?e.axis_y2_default:t.y2.domain()),t.subX=t.getX(t.xMin,t.xMax,t.orgXDomain,function(e){return 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a=this,r=a.config,s=(r.axis_rotated?a.circleY:a.circleX).bind(a),o=(r.axis_rotated?a.circleX:a.circleY).bind(a),c=a.pointSelectR.bind(a);r.data_onselected.call(a.api,e,t.node()),a.main.select("."+i.selectedCircles+a.getTargetSelectorSuffix(e.id)).selectAll("."+i.selectedCircle+"-"+n).data([e]).enter().append("circle").attr("class",function(){return a.generateClass(i.selectedCircle,n)}).attr("cx",s).attr("cy",o).attr("stroke",function(){return a.color(e)}).attr("r",function(t){return 1.4*a.pointSelectR(t)}).transition().duration(100).attr("r",c)},T.unselectPoint=function(t,e,n){this.config.data_onunselected.call(this.api,e,t.node()),this.main.select("."+i.selectedCircles+this.getTargetSelectorSuffix(e.id)).selectAll("."+i.selectedCircle+"-"+n).transition().duration(100).attr("r",0).remove()},T.togglePoint=function(t,e,i,n){t?this.selectPoint(e,i,n):this.unselectPoint(e,i,n)},T.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)})},T.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)})},T.togglePath=function(t,e,i,n){t?this.selectPath(e,i,n):this.unselectPath(e,i,n)},T.getToggle=function(t,e){var i;return"circle"===t.nodeName?i=this.isStepType(e)?function(){}:this.togglePoint:"path"===t.nodeName&&(i=this.togglePath),i},T.toggleShape=function(t,e,n){var a=this,r=a.d3,s=a.config,o=r.select(t),c=o.classed(i.SELECTED),d=a.getToggle(t,e).bind(a);s.data_selection_enabled&&s.data_selection_isselectable(e)&&(s.data_selection_multiple||a.main.selectAll("."+i.shapes+(s.data_selection_grouped?a.getTargetSelectorSuffix(e.id):"")).selectAll("."+i.shape).each(function(t,e){var n=r.select(this);n.classed(i.SELECTED)&&d(!1,n.classed(i.SELECTED,!1),t,e)}),o.classed(i.SELECTED,!c),d(!c,o,e,n))},T.initBar=function(){this.main.select("."+i.chart).append("g").attr("class",i.chartBars)},T.updateTargetsForBar=function(t){var e=this,n=e.config,a=e.classChartBar.bind(e),r=e.classBars.bind(e),s=e.classFocus.bind(e);e.main.select("."+i.chartBars).selectAll("."+i.chartBar).data(t).attr("class",function(t){return a(t)+s(t)}).enter().append("g").attr("class",a).style("pointer-events","none").append("g").attr("class",r).style("cursor",function(t){return n.data_selection_isselectable(t)?"pointer":null})},T.updateBar=function(t){var e=this,n=e.barData.bind(e),a=e.classBar.bind(e),r=e.initialOpacity.bind(e),s=function(t){return e.color(t.id)},o=e.main.selectAll("."+i.bars).selectAll("."+i.bar).data(n),c=o.enter().append("path").attr("class",a).style("stroke",s).style("fill",s);e.mainBar=c.merge(o).style("opacity",r),o.exit().transition().duration(t).style("opacity",0)},T.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)]},T.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},T.getBars=function(t,e){return(e?this.main.selectAll("."+i.bars+this.getTargetSelectorSuffix(e)):this.main).selectAll("."+i.bar+(s(t)?"-"+t:""))},T.expandBars=function(t,e,n){n&&this.unexpandBars(),this.getBars(t,e).classed(i.EXPANDED,!0)},T.unexpandBars=function(t){this.getBars(t).classed(i.EXPANDED,!1)},T.generateDrawBar=function(t,e){var i=this.config,n=this.generateGetBarPoints(t,e);return function(t,e){var a=n(t,e),r=i.axis_rotated?1:0,s=i.axis_rotated?0:1;return"M "+a[0][r]+","+a[0][s]+" L"+a[1][r]+","+a[1][s]+" L"+a[2][r]+","+a[2][s]+" L"+a[3][r]+","+a[3][s]+" z"}},T.generateGetBarPoints=function(t,e){var i=this,n=e?i.subXAxis:i.xAxis,a=t.__max__+1,r=i.getBarW(n,a),s=i.getShapeX(r,a,t,!!e),o=i.getShapeY(!!e),c=i.getShapeOffset(i.isBarType,t,!!e),d=r*(i.config.bar_space/2),u=e?i.getSubYScale:i.getYScale;return function(t,e){var n=u.call(i,t.id)(0),a=c(t,e)||n,l=s(t),h=o(t);return i.config.axis_rotated&&(0<t.value&&h<n||t.value<0&&n<h)&&(h=n),[[l+d,a],[l+d,h-(n-a)],[l+r-d,h-(n-a)],[l+r-d,a]]}},T.isWithinBar=function(t,e){var i=e.getBoundingClientRect(),n=e.pathSegList.getItem(0),a=e.pathSegList.getItem(1),r=Math.min(n.x,a.x),s=Math.min(n.y,a.y),o=r+i.width+2,c=s+i.height+2,d=s-2;return r-2<t[0]&&t[0]<o&&d<t[1]&&t[1]<c},T.getShapeIndices=function(t){var e,i,n=this.config,a={},r=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 a){a[t.id]=a[n.data_groups[e][i]];break}u(a[t.id])&&(a[t.id]=r++)}),a.__max__=r-1,a},T.getShapeX=function(t,e,i,n){var a=n?this.subX:this.x;return function(n){var r=n.id in i?i[n.id]:0;return n.x||0===n.x?a(n.x)-t*(e/2-r):0}},T.getShapeY=function(t){var e=this;return function(i){return(t?e.getSubYScale(i.id):e.getYScale(i.id))(i.value)}},T.getShapeOffset=function(t,e,i){var n=this,a=n.orderTargets(n.filterTargetsToShow(n.data.targets.filter(t,n))),r=a.map(function(t){return t.id});return function(t,s){var o=i?n.getSubYScale(t.id):n.getYScale(t.id),c=o(0),d=c;return a.forEach(function(i){var a=n.isStepType(t)?n.convertValuesToStep(i.values):i.values;i.id!==t.id&&e[i.id]===e[t.id]&&r.indexOf(i.id)<r.indexOf(t.id)&&(void 0!==a[s]&&+a[s].x==+t.x||(s=-1,a.forEach(function(e,i){e.x===t.x&&(s=i)})),s in a&&a[s].value*t.value>=0&&(d+=o(a[s].value)-c))}),d}},T.isWithinShape=function(t,e){var n,a=this,r=a.d3.select(t);return a.isTargetToShow(e.id)?"circle"===t.nodeName?n=a.isStepType(e)?a.isWithinStep(t,a.getYScale(e.id)(e.value)):a.isWithinCircle(t,1.5*a.pointSelectR(e)):"path"===t.nodeName&&(n=!r.classed(i.bar)||a.isWithinBar(a.d3.mouse(t),t)):n=!1,n},T.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};return e.isSplineType(t)?n[e.config.spline_interpolation_type]||n.cardinal:e.isStepType(t)?n[e.config.line_step_type]:n.linear},T.initLine=function(){this.main.select("."+i.chart).append("g").attr("class",i.chartLines)},T.updateTargetsForLine=function(t){var e,n=this,a=n.config,r=n.classChartLine.bind(n),s=n.classLines.bind(n),o=n.classAreas.bind(n),c=n.classCircles.bind(n),d=n.classFocus.bind(n);(e=n.main.select("."+i.chartLines).selectAll("."+i.chartLine).data(t).attr("class",function(t){return r(t)+d(t)}).enter().append("g").attr("class",r).style("opacity",0).style("pointer-events","none")).append("g").attr("class",s),e.append("g").attr("class",o),e.append("g").attr("class",function(t){return n.generateClass(i.selectedCircles,t.id)}),e.append("g").attr("class",c).style("cursor",function(t){return a.data_selection_isselectable(t)?"pointer":null}),t.forEach(function(t){n.main.selectAll("."+i.selectedCircles+n.getTargetSelectorSuffix(t.id)).selectAll("."+i.selectedCircle).each(function(e){e.value=t.values[e.index].value})})},T.updateLine=function(t){var e=this,n=e.main.selectAll("."+i.lines).selectAll("."+i.line).data(e.lineData.bind(e)),a=n.enter().append("path").attr("class",e.classLine.bind(e)).style("stroke",e.color);e.mainLine=a.merge(n).style("opacity",e.initialOpacity.bind(e)).style("shape-rendering",function(t){return e.isStepType(t)?"crispEdges":""}).attr("transform",null),n.exit().transition().duration(t).style("opacity",0)},T.redrawLine=function(t,e,i){return[(e?this.mainLine.transition(i):this.mainLine).attr("d",t).style("stroke",this.color).style("opacity",1)]},T.generateDrawLine=function(t,e){var i=this,n=i.config,a=i.d3.line(),r=i.generateGetLinePoints(t,e),s=e?i.getSubYScale:i.getYScale,o=function(t){return(e?i.subxx:i.xx).call(i,t)},c=function(t,e){return n.data_groups.length>0?r(t,e)[0][1]:s.call(i,t.id)(t.value)};return a=n.axis_rotated?a.x(c).y(o):a.x(o).y(c),n.line_connectNull||(a=a.defined(function(t){return null!=t.value})),function(t){var r,o=n.line_connectNull?i.filterRemoveNull(t.values):t.values,c=e?i.subX:i.x,d=s.call(i,t.id),u=0,l=0;return i.isLineType(t)?n.data_regions[t.id]?r=i.lineWithRegions(o,c,d,n.data_regions[t.id]):(i.isStepType(t)&&(o=i.convertValuesToStep(o)),r=a.curve(i.getInterpolate(t))(o)):(o[0]&&(u=c(o[0].x),l=d(o[0].value)),r=n.axis_rotated?"M "+l+" "+u:"M "+u+" "+l),r||"M 0 0"}},T.generateGetLinePoints=function(t,e){var i=this,n=i.config,a=t.__max__+1,r=i.getShapeX(0,a,t,!!e),s=i.getShapeY(!!e),o=i.getShapeOffset(i.isLineType,t,!!e),c=e?i.getSubYScale:i.getYScale;return function(t,e){var a=c.call(i,t.id)(0),d=o(t,e)||a,u=r(t),l=s(t);return n.axis_rotated&&(0<t.value&&l<a||t.value<0&&a<l)&&(l=a),[[u,l-(a-d)],[u,l-(a-d)],[u,l-(a-d)],[u,l-(a-d)]]}},T.lineWithRegions=function(t,e,i,n){var a,r,s,o,c,d,h,g,f,p,_,x=this,y=x.config,m="M",S=x.isCategorized()?.5:0,w=[];function v(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(l(n))for(a=0;a<n.length;a++)w[a]={},u(n[a].start)?w[a].start=t[0].x:w[a].start=x.isTimeSeries()?x.parseDate(n[a].start):n[a].start,u(n[a].end)?w[a].end=t[t.length-1].x:w[a].end=x.isTimeSeries()?x.parseDate(n[a].end):n[a].end;function b(t){return"M"+t[0][0]+" "+t[0][1]+" "+t[1][0]+" "+t[1][1]}for(p=y.axis_rotated?function(t){return i(t.value)}:function(t){return e(t.x)},_=y.axis_rotated?function(t){return e(t.x)}:function(t){return i(t.value)},s=x.isTimeSeries()?function(t,n,a,r){var s=t.x.getTime(),o=n.x-t.x,d=new Date(s+o*a),u=new Date(s+o*(a+r));return b(y.axis_rotated?[[i(c(a)),e(d)],[i(c(a+r)),e(u)]]:[[e(d),i(c(a))],[e(u),i(c(a+r))]])}:function(t,n,a,r){return b(y.axis_rotated?[[i(c(a),!0),e(o(a))],[i(c(a+r),!0),e(o(a+r))]]:[[e(o(a),!0),i(c(a))],[e(o(a+r),!0),i(c(a+r))]])},a=0;a<t.length;a++){if(u(w)||!v(t[a].x,w))m+=" "+p(t[a])+" "+_(t[a]);else for(o=x.getScale(t[a-1].x+S,t[a].x+S,x.isTimeSeries()),c=x.getScale(t[a-1].value,t[a].value),d=e(t[a].x)-e(t[a-1].x),h=i(t[a].value)-i(t[a-1].value),f=2*(g=2/Math.sqrt(Math.pow(d,2)+Math.pow(h,2))),r=g;r<=1;r+=f)m+=s(t[a-1],t[a],r,g);t[a].x}return m},T.updateArea=function(t){var e=this,n=e.d3,a=e.main.selectAll("."+i.areas).selectAll("."+i.area).data(e.lineData.bind(e)),r=a.enter().append("path").attr("class",e.classArea.bind(e)).style("fill",e.color).style("opacity",function(){return e.orgAreaOpacity=+n.select(this).style("opacity"),0});e.mainArea=r.merge(a).style("opacity",e.orgAreaOpacity),a.exit().transition().duration(t).style("opacity",0)},T.redrawArea=function(t,e,i){return[(e?this.mainArea.transition(i):this.mainArea).attr("d",t).style("fill",this.color).style("opacity",this.orgAreaOpacity)]},T.generateDrawArea=function(t,e){var i=this,n=i.config,a=i.d3.area(),r=i.generateGetAreaPoints(t,e),s=e?i.getSubYScale:i.getYScale,o=function(t){return(e?i.subxx:i.xx).call(i,t)},c=function(t,e){return n.data_groups.length>0?r(t,e)[0][1]:s.call(i,t.id)(i.getAreaBaseValue(t.id))},d=function(t,e){return n.data_groups.length>0?r(t,e)[1][1]:s.call(i,t.id)(t.value)};return a=n.axis_rotated?a.x0(c).x1(d).y(o):a.x(o).y0(n.area_above?0:c).y1(d),n.line_connectNull||(a=a.defined(function(t){return null!==t.value})),function(t){var e,r=n.line_connectNull?i.filterRemoveNull(t.values):t.values,s=0,o=0;return i.isAreaType(t)?(i.isStepType(t)&&(r=i.convertValuesToStep(r)),e=a.curve(i.getInterpolate(t))(r)):(r[0]&&(s=i.x(r[0].x),o=i.getYScale(t.id)(r[0].value)),e=n.axis_rotated?"M "+o+" "+s:"M "+s+" "+o),e||"M 0 0"}},T.getAreaBaseValue=function(){return 0},T.generateGetAreaPoints=function(t,e){var i=this,n=i.config,a=t.__max__+1,r=i.getShapeX(0,a,t,!!e),s=i.getShapeY(!!e),o=i.getShapeOffset(i.isAreaType,t,!!e),c=e?i.getSubYScale:i.getYScale;return function(t,e){var a=c.call(i,t.id)(0),d=o(t,e)||a,u=r(t),l=s(t);return n.axis_rotated&&(0<t.value&&l<a||t.value<0&&a<l)&&(l=a),[[u,d],[u,l-(a-d)],[u,l-(a-d)],[u,d]]}},T.updateCircle=function(t,e){var n=this,a=n.main.selectAll("."+i.circles).selectAll("."+i.circle).data(n.lineOrScatterData.bind(n)),r=a.enter().append("circle").attr("class",n.classCircle.bind(n)).attr("cx",t).attr("cy",e).attr("r",n.pointR.bind(n)).style("fill",n.color);n.mainCircle=r.merge(a).style("opacity",n.initialOpacityForCircle.bind(n)),a.exit().style("opacity",0)},T.redrawCircle=function(t,e,n,a){var r=this,s=r.main.selectAll("."+i.selectedCircle);return[(n?r.mainCircle.transition(a):r.mainCircle).style("opacity",this.opacityForCircle.bind(r)).style("fill",r.color).attr("cx",t).attr("cy",e),(n?s.transition(a):s).attr("cx",t).attr("cy",e)]},T.circleX=function(t){return t.x||0===t.x?this.x(t.x):null},T.updateCircleY=function(){var t,e,i=this;i.config.data_groups.length>0?(t=i.getShapeIndices(i.isLineType),e=i.generateGetLinePoints(t),i.circleY=function(t,i){return e(t,i)[0][1]}):i.circleY=function(t){return i.getYScale(t.id)(t.value)}},T.getCircles=function(t,e){return(e?this.main.selectAll("."+i.circles+this.getTargetSelectorSuffix(e)):this.main).selectAll("."+i.circle+(s(t)?"-"+t:""))},T.expandCircles=function(t,e,n){var a=this.pointExpandedR.bind(this);n&&this.unexpandCircles(),this.getCircles(t,e).classed(i.EXPANDED,!0).attr("r",a)},T.unexpandCircles=function(t){var e=this,n=e.pointR.bind(e);e.getCircles(t).filter(function(){return e.d3.select(this).classed(i.EXPANDED)}).classed(i.EXPANDED,!1).attr("r",n)},T.pointR=function(t){var e=this.config;return this.isStepType(t)?0:o(e.point_r)?e.point_r(t):e.point_r},T.pointExpandedR=function(t){var e=this.config;return e.point_focus_expand_enabled?o(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)},T.pointSelectR=function(t){var e=this.config;return o(e.point_select_r)?e.point_select_r(t):e.point_select_r?e.point_select_r:4*this.pointR(t)},T.isWithinCircle=function(t,e){var i=this.d3,n=i.mouse(t),a=i.select(t),r=+a.attr("cx"),s=+a.attr("cy");return Math.sqrt(Math.pow(r-n[0],2)+Math.pow(s-n[1],2))<e},T.isWithinStep=function(t,e){return Math.abs(e-this.d3.mouse(t)[1])<30},T.getCurrentWidth=function(){var t=this.config;return t.size_width?t.size_width:this.getParentWidth()},T.getCurrentHeight=function(){var t=this.config,e=t.size_height?t.size_height:this.getParentHeight();return e>0?e:320/(this.hasType("gauge")&&!t.gauge_fullCircle?2:1)},T.getCurrentPaddingTop=function(){var t=this.config,e=s(t.padding_top)?t.padding_top:0;return this.title&&this.title.node()&&(e+=this.getTitlePadding()),e},T.getCurrentPaddingBottom=function(){var t=this.config;return s(t.padding_bottom)?t.padding_bottom:0},T.getCurrentPaddingLeft=function(t){var e=this.config;return s(e.padding_left)?e.padding_left:e.axis_rotated?!e.axis_x_show||e.axis_x_inner?1:Math.max(h(this.getAxisWidthByAxisId("x",t)),40):!e.axis_y_show||e.axis_y_inner?this.axis.getYAxisLabelPosition().isOuter?30:1:h(this.getAxisWidthByAxisId("y",t))},T.getCurrentPaddingRight=function(){var t=this,e=t.config,i=t.isLegendRight?t.getLegendWidth()+20:0;return s(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):h(t.getAxisWidthByAxisId("y2"))+i},T.getParentRectValue=function(t){for(var e,i=this.selectChart.node();i&&"BODY"!==i.tagName;){try{e=i.getBoundingClientRect()[t]}catch(n){"width"===t&&(e=i.offsetWidth)}if(e)break;i=i.parentNode}return e},T.getParentWidth=function(){return this.getParentRectValue("width")},T.getParentHeight=function(){var t=this.selectChart.style("height");return t.indexOf("px")>0?+t.replace("px",""):0},T.getSvgLeft=function(t){var e=this,n=e.config,a=n.axis_rotated||!n.axis_rotated&&!n.axis_y_inner,r=n.axis_rotated?i.axisX:i.axisY,s=e.main.select("."+r).node(),o=s&&a?s.getBoundingClientRect():{right:0},c=e.selectChart.node().getBoundingClientRect(),d=e.hasArcType(),u=o.right-c.left-(d?0:e.getCurrentPaddingLeft(t));return u>0?u:0},T.getAxisWidthByAxisId=function(t,e){var i=this.axis.getLabelPositionById(t);return this.axis.getMaxTickWidth(t,e)+(i.isInner?20:40)},T.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},T.initBrush=function(t){var e=this,n=e.d3;return e.brush=(e.config.axis_rotated?n.brushY():n.brushX()).on("brush",function(){var t=n.event.sourceEvent;t&&"zoom"===t.type||e.redrawForBrush()}).on("end",function(){var t=n.event.sourceEvent;t&&"zoom"===t.type||e.brush.empty()&&t&&"end"!==t.type&&e.brush.clear()}),e.brush.updateExtent=function(){var t,i=this.scale.range();return t=e.config.axis_rotated?[[0,i[0]],[e.width2,i[1]]]:[[i[0],0],[i[1],e.height2]],this.extent(t),this},e.brush.updateScale=function(t){return this.scale=t,this},e.brush.update=function(t){this.updateScale(t||e.subX).updateExtent(),e.context.select("."+i.brush).call(this)},e.brush.clear=function(){e.context.select("."+i.brush).call(e.brush.move,null)},e.brush.selection=function(){return n.brushSelection(e.context.select("."+i.brush).node())},e.brush.selectionAsValue=function(t,n){var a,r;return t?(e.context&&(a=[this.scale(t[0]),this.scale(t[1])],r=e.context.select("."+i.brush),n&&(r=r.transition()),e.brush.move(r,a)),[]):(a=e.brush.selection()||[0,0],[this.scale.invert(a[0]),this.scale.invert(a[1])])},e.brush.empty=function(){var t=e.brush.selection();return!t||t[0]===t[1]},e.brush.updateScale(t)},T.initSubchart=function(){var t=this,e=t.config,n=t.context=t.svg.append("g").attr("transform",t.getTranslate("context")),a=e.subchart_show?"visible":"hidden";n.style("visibility",a),n.append("g").attr("clip-path",t.clipPathForSubchart).attr("class",i.chart),n.select("."+i.chart).append("g").attr("class",i.chartBars),n.select("."+i.chart).append("g").attr("class",i.chartLines),n.append("g").attr("clip-path",t.clipPath).attr("class",i.brush),t.axes.subx=n.append("g").attr("class",i.axisX).attr("transform",t.getTranslate("subx")).attr("clip-path",e.axis_rotated?"":t.clipPathForXAxis)},T.initSubchartBrush=function(){this.initBrush(this.subX).updateExtent(),this.context.select("."+i.brush).call(this.brush)},T.updateTargetsForSubchart=function(t){var e,n,a,r,s=this,o=s.context,c=s.config,d=s.classChartBar.bind(s),u=s.classBars.bind(s),l=s.classChartLine.bind(s),h=s.classLines.bind(s),g=s.classAreas.bind(s);c.subchart_show&&((a=(r=o.select("."+i.chartBars).selectAll("."+i.chartBar).data(t)).enter().append("g").style("opacity",0)).merge(r).attr("class",d),a.append("g").attr("class",u),(e=(n=o.select("."+i.chartLines).selectAll("."+i.chartLine).data(t)).enter().append("g").style("opacity",0)).merge(n).attr("class",l),e.append("g").attr("class",h),e.append("g").attr("class",g),o.selectAll("."+i.brush+" rect").attr(c.axis_rotated?"width":"height",c.axis_rotated?s.width2:s.height2))},T.updateBarForSubchart=function(t){var e=this,n=e.context.selectAll("."+i.bars).selectAll("."+i.bar).data(e.barData.bind(e)),a=n.enter().append("path").attr("class",e.classBar.bind(e)).style("stroke","none").style("fill",e.color);n.exit().transition().duration(t).style("opacity",0).remove(),e.contextBar=a.merge(n).style("opacity",e.initialOpacity.bind(e))},T.redrawBarForSubchart=function(t,e,i){(e?this.contextBar.transition(Math.random().toString()).duration(i):this.contextBar).attr("d",t).style("opacity",1)},T.updateLineForSubchart=function(t){var e=this,n=e.context.selectAll("."+i.lines).selectAll("."+i.line).data(e.lineData.bind(e)),a=n.enter().append("path").attr("class",e.classLine.bind(e)).style("stroke",e.color);n.exit().transition().duration(t).style("opacity",0).remove(),e.contextLine=a.merge(n).style("opacity",e.initialOpacity.bind(e))},T.redrawLineForSubchart=function(t,e,i){(e?this.contextLine.transition(Math.random().toString()).duration(i):this.contextLine).attr("d",t).style("opacity",1)},T.updateAreaForSubchart=function(t){var e=this,n=e.d3,a=e.context.selectAll("."+i.areas).selectAll("."+i.area).data(e.lineData.bind(e)),r=a.enter().append("path").attr("class",e.classArea.bind(e)).style("fill",e.color).style("opacity",function(){return e.orgAreaOpacity=+n.select(this).style("opacity"),0});a.exit().transition().duration(t).style("opacity",0).remove(),e.contextArea=r.merge(a).style("opacity",0)},T.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)},T.redrawSubchart=function(t,e,i,n,a,r,s){var o,c,d,u=this,l=u.d3,h=u.config;u.context.style("visibility",h.subchart_show?"visible":"hidden"),h.subchart_show&&(l.event&&"zoom"===l.event.type&&u.brush.selectionAsValue(u.x.orgDomain()),t&&(u.brush.empty()||u.brush.selectionAsValue(u.x.orgDomain()),o=u.generateDrawArea(a,!0),c=u.generateDrawBar(r,!0),d=u.generateDrawLine(s,!0),u.updateBarForSubchart(i),u.updateLineForSubchart(i),u.updateAreaForSubchart(i),u.redrawBarForSubchart(c,i,i),u.redrawLineForSubchart(d,i,i),u.redrawAreaForSubchart(o,i,i)))},T.redrawForBrush=function(){var t,e=this,n=e.x,a=e.d3;e.redraw({withTransition:!1,withY:e.config.zoom_rescale,withSubchart:!1,withUpdateXDomain:!0,withEventRect:!1,withDimension:!1}),t=a.event.selection||e.brush.scale.range(),e.main.select("."+i.eventRect).call(e.zoom.transform,a.zoomIdentity.scale(e.width/(t[1]-t[0])).translate(-t[0],0)),e.config.subchart_onbrush.call(e.api,n.orgDomain())},T.transformContext=function(t,e){var n;e&&e.axisSubX?n=e.axisSubX:(n=this.context.select("."+i.axisX),t&&(n=n.transition())),this.context.attr("transform",this.getTranslate("context")),n.attr("transform",this.getTranslate("subx"))},T.getDefaultSelection=function(){var t=this,e=t.config,i=o(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},T.initText=function(){this.main.select("."+i.chart).append("g").attr("class",i.chartTexts),this.mainText=this.d3.selectAll([])},T.updateTargetsForText=function(t){var e=this,n=e.classChartText.bind(e),a=e.classTexts.bind(e),r=e.classFocus.bind(e),s=e.main.select("."+i.chartTexts).selectAll("."+i.chartText).data(t),o=s.enter().append("g").attr("class",n).style("opacity",0).style("pointer-events","none");o.append("g").attr("class",a),o.merge(s).attr("class",function(t){return n(t)+r(t)})},T.updateText=function(t,e,n){var a=this,r=a.config,s=a.barOrLineData.bind(a),o=a.classText.bind(a),c=a.main.selectAll("."+i.texts).selectAll("."+i.text).data(s),d=c.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 a.color(t)}).style("fill-opacity",0);a.mainText=d.merge(c).text(function(t,e,i){return a.dataLabelFormat(t.id)(t.value,t.id,e,i)}),c.exit().transition().duration(n).style("fill-opacity",0).remove()},T.redrawText=function(t,e,i,n,a){return[(n?this.mainText.transition(a):this.mainText).attr("x",t).attr("y",e).style("fill",this.color).style("fill-opacity",i?0:this.opacityForText.bind(this))]},T.getTextRect=function(t,e,i){var n,a=this.d3.select("body").append("div").classed("c3",!0),r=a.append("svg").style("visibility","hidden").style("position","fixed").style("top",0).style("left",0),s=this.d3.select(i).style("font");return r.selectAll(".dummy").data([t]).enter().append("text").classed(e||"",!0).style("font",s).text(t).each(function(){n=this.getBoundingClientRect()}),a.remove(),n},T.generateXYForText=function(t,e,i,n){var a=this,r=a.generateGetAreaPoints(t,!1),s=a.generateGetBarPoints(e,!1),o=a.generateGetLinePoints(i,!1),c=n?a.getXForText:a.getYForText;return function(t,e){var i=a.isAreaType(t)?r:a.isBarType(t)?s:o;return c.call(a,i(t,e),t,this)}},T.getXForText=function(t,e,i){var n,a,r=this,s=i.getBoundingClientRect();return r.config.axis_rotated?(a=r.isBarType(e)?4:6,n=t[2][1]+a*(e.value<0?-1:1)):n=r.hasType("bar")?(t[2][0]+t[0][0])/2:t[0][0],null===e.value&&(n>r.width?n=r.width-s.width:n<0&&(n=4)),n},T.getYForText=function(t,e,i){var n,a=this,r=i.getBoundingClientRect();return a.config.axis_rotated?n=(t[0][0]+t[2][0]+.6*r.height)/2:(n=t[2][1],e.value<0||0===e.value&&!a.hasPositiveValue?(n+=r.height,a.isBarType(e)&&a.isSafari()?n-=3:!a.isBarType(e)&&a.isChrome()&&(n+=3)):n+=a.isBarType(e)?-3:-6),null!==e.value||a.config.axis_rotated||(n<r.height?n=r.height:n>this.height&&(n=this.height-4)),n},T.initTitle=function(){this.title=this.svg.append("text").text(this.config.title_text).attr("class",this.CLASS.title)},T.redrawTitle=function(){var t=this;t.title.attr("x",t.xForTitle.bind(t)).attr("y",t.yForTitle.bind(t))},T.xForTitle=function(){var t=this,e=t.config,i=e.title_position||"left";return i.indexOf("right")>=0?t.currentWidth-t.getTextRect(t.title.node().textContent,t.CLASS.title,t.title.node()).width-e.title_padding.right:i.indexOf("center")>=0?(t.currentWidth-t.getTextRect(t.title.node().textContent,t.CLASS.title,t.title.node()).width)/2:e.title_padding.left},T.yForTitle=function(){var t=this;return t.config.title_padding.top+t.getTextRect(t.title.node().textContent,t.CLASS.title,t.title.node()).height},T.getTitlePadding=function(){return this.yForTitle()+this.config.title_padding.bottom},T.initTooltip=function(){var t,e=this,n=e.config;if(e.tooltip=e.selectChart.style("position","relative").append("div").attr("class",i.tooltipContainer).style("position","absolute").style("pointer-events","none").style("display","none"),n.tooltip_init_show){if(e.isTimeSeries()&&d(n.tooltip_init_x)){for(n.tooltip_init_x=e.parseDate(n.tooltip_init_x),t=0;t<e.data.targets[0].values.length&&e.data.targets[0].values[t].x-n.tooltip_init_x!=0;t++);n.tooltip_init_x=t}e.tooltip.html(n.tooltip_contents.call(e,e.data.targets.map(function(t){return e.addName(t.values[n.tooltip_init_x])}),e.axis.getXAxisTickFormat(),e.getYFormat(e.hasArcType()),e.color)),e.tooltip.style("top",n.tooltip_init_position.top).style("left",n.tooltip_init_position.left).style("display","block")}},T.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 a=function(t){return t?t.value:null};if(d(n)&&"asc"===n.toLowerCase())return function(t,e){return a(t)-a(e)};if(d(n)&&"desc"===n.toLowerCase())return function(t,e){return a(e)-a(t)};if(o(n)){var r=n;return void 0===e.tooltip_order&&(r=function(t,e){return n(t?{id:t.id,values:[t]}:null,e?{id:e.id,values:[e]}:null)}),r}return c(n)?function(t,e){return n.indexOf(t.id)-n.indexOf(e.id)}:void 0},T.getTooltipContent=function(t,e,i,n){var a,r,s,o,c,d,u=this,l=u.config,h=l.tooltip_format_title||e,g=l.tooltip_format_name||function(t){return t},f=l.tooltip_format_value||i,p=this.getTooltipSortFunction();for(p&&t.sort(p),r=0;r<t.length;r++)if(t[r]&&(t[r].value||0===t[r].value)&&(a||(s=m(h?h(t[r].x):t[r].x),a="<table class='"+u.CLASS.tooltip+"'>"+(s||0===s?"<tr><th colspan='2'>"+s+"</th></tr>":"")),void 0!==(o=m(f(t[r].value,t[r].ratio,t[r].id,t[r].index,t))))){if(null===t[r].name)continue;c=m(g(t[r].name,t[r].ratio,t[r].id,t[r].index)),d=u.levelColor?u.levelColor(t[r].value):n(t[r].id),a+="<tr class='"+u.CLASS.tooltipName+"-"+u.getTargetSelectorSuffix(t[r].id)+"'>",a+="<td class='name'><span style='background-color:"+d+"'></span>"+c+"</td>",a+="<td class='value'>"+o+"</td>",a+="</tr>"}return a+"</table>"},T.tooltipPosition=function(t,e,i,n){var a,r,s,o,c,d=this,u=d.config,l=d.d3,h=d.hasArcType(),g=l.mouse(n);return h?(r=(d.width-(d.isLegendRight?d.getLegendWidth():0))/2+g[0],o=(d.hasType("gauge")?d.height:d.height/2)+g[1]+20):(a=d.getSvgLeft(!0),u.axis_rotated?(s=(r=a+g[0]+100)+e,c=d.currentWidth-d.getCurrentPaddingRight(),o=d.x(t[0].x)+20):(s=(r=a+d.getCurrentPaddingLeft(!0)+d.x(t[0].x)+20)+e,c=a+d.currentWidth-d.getCurrentPaddingRight(),o=g[1]+15),s>c&&(r-=s-c+20),o+i>d.currentHeight&&(o-=i+30)),o<0&&(o=0),{top:o,left:r}},T.showTooltip=function(t,e){var i,n,a,r=this,o=r.config,c=r.hasArcType(),d=t.filter(function(t){return t&&s(t.value)}),u=o.tooltip_position||T.tooltipPosition;0!==d.length&&o.tooltip_show&&(r.tooltip.html(o.tooltip_contents.call(r,t,r.axis.getXAxisTickFormat(),r.getYFormat(c),r.color)).style("display","block"),i=r.tooltip.property("offsetWidth"),n=r.tooltip.property("offsetHeight"),a=u.call(this,d,i,n,e),r.tooltip.style("top",a.top+"px").style("left",a.left+"px"))},T.hideTooltip=function(){this.tooltip.style("display","none")},T.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)},T.hasType=function(t,e){var i=this.config.data_types,n=!1;return(e=e||this.data.targets)&&e.length?e.forEach(function(e){var a=i[e.id];(a&&a.indexOf(t)>=0||!a&&"line"===t)&&(n=!0)}):Object.keys(i).length?Object.keys(i).forEach(function(e){i[e]===t&&(n=!0)}):n=this.config.data_type===t,n},T.hasArcType=function(t){return this.hasType("pie",t)||this.hasType("donut",t)||this.hasType("gauge",t)},T.isLineType=function(t){var e=this.config,i=d(t)?t:t.id;return!e.data_types[i]||["line","spline","area","area-spline","step","area-step"].indexOf(e.data_types[i])>=0},T.isStepType=function(t){var e=d(t)?t:t.id;return["step","area-step"].indexOf(this.config.data_types[e])>=0},T.isSplineType=function(t){var e=d(t)?t:t.id;return["spline","area-spline"].indexOf(this.config.data_types[e])>=0},T.isAreaType=function(t){var e=d(t)?t:t.id;return["area","area-spline","area-step"].indexOf(this.config.data_types[e])>=0},T.isBarType=function(t){var e=d(t)?t:t.id;return"bar"===this.config.data_types[e]},T.isScatterType=function(t){var e=d(t)?t:t.id;return"scatter"===this.config.data_types[e]},T.isPieType=function(t){var e=d(t)?t:t.id;return"pie"===this.config.data_types[e]},T.isGaugeType=function(t){var e=d(t)?t:t.id;return"gauge"===this.config.data_types[e]},T.isDonutType=function(t){var e=d(t)?t:t.id;return"donut"===this.config.data_types[e]},T.isArcType=function(t){return this.isPieType(t)||this.isDonutType(t)||this.isGaugeType(t)},T.lineData=function(t){return this.isLineType(t)?[t]:[]},T.arcData=function(t){return this.isArcType(t.data)?[t]:[]},T.barData=function(t){return this.isBarType(t)?t.values:[]},T.lineOrScatterData=function(t){return this.isLineType(t)||this.isScatterType(t)?t.values:[]},T.barOrLineData=function(t){return this.isBarType(t)||this.isLineType(t)?t.values:[]},T.isSafari=function(){var t=window.navigator.userAgent;return t.indexOf("Safari")>=0&&t.indexOf("Chrome")<0},T.isChrome=function(){return window.navigator.userAgent.indexOf("Chrome")>=0},T.initZoom=function(){var t,e=this,i=e.d3,n=e.config;return e.zoom=i.zoom().on("start",function(){var a=i.event.sourceEvent;a&&"brush"===a.type||(t=a,n.zoom_onzoomstart.call(e.api,a))}).on("zoom",function(){var t=i.event.sourceEvent;t&&"brush"===t.type||e.redrawForZoom.call(e)}).on("end",function(){var a=i.event.sourceEvent;a&&"brush"===a.type||a&&t.clientX===a.clientX&&t.clientY===a.clientY||n.zoom_onzoomend.call(e.api,e.x.orgDomain())}),e.zoom.updateDomain=function(){return i.event&&i.event.transform&&e.x.domain(i.event.transform.rescaleX(e.subX).domain()),this},e.zoom.updateExtent=function(){return this.scaleExtent([1,1/0]).translateExtent([[0,0],[e.width,e.height]]).extent([[0,0],[e.width,e.height]]),this},e.zoom.update=function(){return this.updateExtent().updateDomain()},e.zoom.updateExtent()},T.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)},T.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])]},T.redrawForZoom=function(){var t=this,e=t.d3,i=t.config,n=t.zoom,a=t.x;i.zoom_enabled&&0!==t.filterTargetsToShow(t.data.targets).length&&(n.update(),t.isCategorized()&&a.orgDomain()[0]===t.orgXDomain[0]&&a.domain([t.orgXDomain[0]-1e-10,a.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),i.zoom_onzoom.call(t.api,a.orgDomain()))},A});
\ No newline at end of file
diff --git a/web/static/d3.js b/web/static/d3.js
deleted file mode 100644
index 016b8d2..0000000
--- a/web/static/d3.js
+++ /dev/null
@@ -1,17813 +0,0 @@
-// https://d3js.org Version 5.4.0. 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 = "5.4.0";
-
-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,
-      clamp = false;
-
-  function scale(x) {
-    var t = (x - x0) / (x1 - x0);
-    return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
-  }
-
-  scale.domain = function(_) {
-    return arguments.length ? (x0 = +_[0], x1 = +_[1], 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 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(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.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;
-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
deleted file mode 100644
index d715d22..0000000
--- a/web/static/d3.min.js
+++ /dev/null
@@ -1,2 +0,0 @@
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e=Math.sqrt(n/P_),r=e*C_;t.moveTo(0,-e),t.lineTo(r,0),t.lineTo(0,e),t.lineTo(-r,0),t.closePath()}},R_=Math.sin(M_/10)/Math.sin(7*M_/10),L_=Math.sin(T_/10)*R_,D_=-Math.cos(T_/10)*R_,U_={draw:function(t,n){var e=Math.sqrt(.8908130915292852*n),r=L_*e,i=D_*e;t.moveTo(0,-e),t.lineTo(r,i);for(var o=1;o<5;++o){var a=T_*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()}},q_={draw:function(t,n){var e=Math.sqrt(n),r=-e/2;t.rect(r,r,e,e)}},O_=Math.sqrt(3),Y_={draw:function(t,n){var e=-Math.sqrt(n/(3*O_));t.moveTo(0,2*e),t.lineTo(-O_*e,-e),t.lineTo(O_*e,-e),t.closePath()}},B_=Math.sqrt(3)/2,F_=1/Math.sqrt(12),I_=3*(F_/2+1),j_={draw:function(t,n){var e=Math.sqrt(n/I_),r=e/2,i=e*F_,o=r,a=e*F_+e,u=-o,f=a;t.moveTo(r,i),t.lineTo(o,a),t.lineTo(u,f),t.lineTo(-.5*r-B_*i,B_*r+-.5*i),t.lineTo(-.5*o-B_*a,B_*o+-.5*a),t.lineTo(-.5*u-B_*f,B_*u+-.5*f),t.lineTo(-.5*r+B_*i,-.5*i-B_*r),t.lineTo(-.5*o+B_*a,-.5*a-B_*o),t.lineTo(-.5*u+B_*f,-.5*f-B_*u),t.closePath()}},H_=[E_,k_,z_,q_,U_,Y_,j_];Bf.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:Yf(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:Yf(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},If.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:Yf(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},jf.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
deleted file mode 100644
index e3711ff..0000000
--- a/web/static/seepark_web.css
+++ /dev/null
@@ -1,40 +0,0 @@
-.region-frozen {
-    fill: blue;
-}
-
-.region-ok {
-    fill: white;
-}
-
-.region-warm {
-    fill: orange;
-}
-
-.region-boiling {
-    fill: red;
-}
-
-#openweathermap-widget-15, .c3 {
-    margin: 0 auto;
-    text-align: center;
-    padding-top: 1em;
-}
-
-#openweathermap-widget-15 {
-    width: 300px;
-}
-
-#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
deleted file mode 100644
index 66cc2a9..0000000
--- a/web/static/seepark_web.js
+++ /dev/null
@@ -1,159 +0,0 @@
-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';
-
-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'
-				},
-				names: {
-					'0416a1ac66ff': 'Wassertemperatur in 50 cm Tiefe',
-					'0516a207a4ff': 'Wassertemperatur in 1 m Tiefe',
-					'0416a1bab9ff': 'Wassertemperatur in 2 m Tiefe'
-				},
-				xFormat: '%Y-%m-%d %H:%M:%S',
-				colors: {
-					'0416a1ac66ff': 'lightskyblue',
-					'0516a207a4ff': 'royalblue',
-					'0416a1bab9ff': 'midnightblue'
-				}
-		};
-	} 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: document.getElementById(element).parentElement.clientWidth * 80 / 100
-		},
-		transition: {
-			duration: null
-		},
-		title: {
-			text: title
-		},
-		data: chartdata,
-		point: {
-			r: 1.5 // default 2.5
-		},
-		axis: {
-			x: {
-				type: 'timeseries',
-				tick: {
-					format: xtickformat,
-					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) {
-				// UNIX epoch
-				var start = domain[0].getTime()/1000;
-				var end   = domain[1].getTime()/1000;
-				var duration = end - start;
-				// duration is now the diff of the "viewport in seconds"
-				// FIXME
-				var days = Math.round(duration / 86400 / 2);
-				if (days > 0) {
-					loaddays(days);
-				}
-			}
-		},
-		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 (x) {
-					// TODO: format datetime into something readable
-					return x;
-				}
-			}
-		},
-		grid: {
-			y: {
-				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'}
-		]
-	});
-};
-
-function loaddays(days) {
-	chart.load({
-		url: api_base_url_sensors + beginend(days),
-		mimeType: 'json'
-	});
-}
-
-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;
-}
-
-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, 'Woche %V');
-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, 'Woche %V');
-dayschart('chart_air_365',   'Die Luft (Jahr)',  365, '%b %Y');
diff --git a/web/templates/seepark_web.html b/web/templates/seepark_web.html
deleted file mode 100644
index 3eae133..0000000
--- a/web/templates/seepark_web.html
+++ /dev/null
@@ -1,80 +0,0 @@
-<!DOCTYPE html>
-<html lang="de">
-	<head>
-		<!-- 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" />
-		<meta http-equiv="Refresh" content="300" />
-
-		<!-- Load c3.css -->
-		<link href="{{url_for('static', filename='c3.css')}}" rel="stylesheet">
-
-		<!-- Load own css -->
-		<link href="{{url_for('static', filename='seepark_web.css')}}" rel="stylesheet">
-
-		<!-- Load d3.js and c3.js -->
-		<script src="{{url_for('static', filename='d3.js')}}" charset="utf-8"></script>
-		<script src="{{url_for('static', filename='c3.js')}}"></script>
-
-		<title>Seepark Obsteig</title>
-	</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: {{ airvalue|round(1) }}°C</strong><br />
-			<small>({{ airtime.strftime('%Y-%m-%d %H:%M') }})</small>
-			{% endif %}
-		</p>
-		<p id="currentwater">
-			<strong>Wasser: {{ watervalue|round(1) }}°C</strong><br />
-			<small>({{ watertime.strftime('%Y-%m-%d %H:%M') }})</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',
-		});
-		(function() {
-			var script = document.createElement('script');
-			script.async = true;
-			script.charset = "utf-8";
-			script.src = "//openweathermap.org/themes/openweathermap/assets/vendor/owm/js/weather-widget-generator.js";
-			var s = document.getElementsByTagName('script')[0];
-			s.parentNode.insertBefore(script, s);
-		})();
-		</script>
-
-		<!-- Load own javascript code -->
-		<script src="{{url_for('static', filename='seepark_web.js')}}"></script>
-
-	</body>
-</html>