--- /dev/null
+/*
+
+ OpenLayers.js -- OpenLayers Map Viewer Library
+
+ Copyright (c) 2006-2013 by OpenLayers Contributors
+ Published under the 2-clause BSD license.
+ See http://openlayers.org/dev/license.txt for the full text of the license, and http://openlayers.org/dev/authors.txt for full list of contributors.
+
+ Includes compressed code under the following licenses:
+
+ (For uncompressed versions of the code used, please see the
+ OpenLayers Github repository: <https://github.com/openlayers/openlayers>)
+
+*/
+
+/**
+ * Contains XMLHttpRequest.js <http://code.google.com/p/xmlhttprequest/>
+ * Copyright 2007 Sergey Ilinsky (http://www.ilinsky.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+/**
+ * OpenLayers.Util.pagePosition is based on Yahoo's getXY method, which is
+ * Copyright (c) 2006, Yahoo! Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms, with or
+ * without modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * * Neither the name of Yahoo! Inc. nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission of Yahoo! Inc.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/* ======================================================================
+ OpenLayers/SingleFile.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+var OpenLayers = {
+ /**
+ * Constant: VERSION_NUMBER
+ */
+ VERSION_NUMBER: "Release 2.13.1",
+
+ /**
+ * Constant: singleFile
+ * TODO: remove this in 3.0 when we stop supporting build profiles that
+ * include OpenLayers.js
+ */
+ singleFile: true,
+
+ /**
+ * Method: _getScriptLocation
+ * Return the path to this script. This is also implemented in
+ * OpenLayers.js
+ *
+ * Returns:
+ * {String} Path to this script
+ */
+ _getScriptLocation: (function() {
+ var r = new RegExp("(^|(.*?\\/))(OpenLayers[^\\/]*?\\.js)(\\?|$)"),
+ s = document.getElementsByTagName('script'),
+ src, m, l = "";
+ for(var i=0, len=s.length; i<len; i++) {
+ src = s[i].getAttribute('src');
+ if(src) {
+ m = src.match(r);
+ if(m) {
+ l = m[1];
+ break;
+ }
+ }
+ }
+ return (function() { return l; });
+ })(),
+
+ /**
+ * Property: ImgPath
+ * {String} Set this to the path where control images are stored, a path
+ * given here must end with a slash. If set to '' (which is the default)
+ * OpenLayers will use its script location + "img/".
+ *
+ * You will need to set this property when you have a singlefile build of
+ * OpenLayers that either is not named "OpenLayers.js" or if you move
+ * the file in a way such that the image directory cannot be derived from
+ * the script location.
+ *
+ * If your custom OpenLayers build is named "my-custom-ol.js" and the images
+ * of OpenLayers are in a folder "/resources/external/images/ol" a correct
+ * way of including OpenLayers in your HTML would be:
+ *
+ * (code)
+ * <script src="/path/to/my-custom-ol.js" type="text/javascript"></script>
+ * <script type="text/javascript">
+ * // tell OpenLayers where the control images are
+ * // remember the trailing slash
+ * OpenLayers.ImgPath = "/resources/external/images/ol/";
+ * </script>
+ * (end code)
+ *
+ * Please remember that when your OpenLayers script is not named
+ * "OpenLayers.js" you will have to make sure that the default theme is
+ * loaded into the page by including an appropriate <link>-tag,
+ * e.g.:
+ *
+ * (code)
+ * <link rel="stylesheet" href="/path/to/default/style.css" type="text/css">
+ * (end code)
+ */
+ ImgPath : ''
+};
+/* ======================================================================
+ OpenLayers/BaseTypes.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/SingleFile.js
+ */
+
+/**
+ * Header: OpenLayers Base Types
+ * OpenLayers custom string, number and function functions are described here.
+ */
+
+/**
+ * Namespace: OpenLayers.String
+ * Contains convenience functions for string manipulation.
+ */
+OpenLayers.String = {
+
+ /**
+ * APIFunction: startsWith
+ * Test whether a string starts with another string.
+ *
+ * Parameters:
+ * str - {String} The string to test.
+ * sub - {String} The substring to look for.
+ *
+ * Returns:
+ * {Boolean} The first string starts with the second.
+ */
+ startsWith: function(str, sub) {
+ return (str.indexOf(sub) == 0);
+ },
+
+ /**
+ * APIFunction: contains
+ * Test whether a string contains another string.
+ *
+ * Parameters:
+ * str - {String} The string to test.
+ * sub - {String} The substring to look for.
+ *
+ * Returns:
+ * {Boolean} The first string contains the second.
+ */
+ contains: function(str, sub) {
+ return (str.indexOf(sub) != -1);
+ },
+
+ /**
+ * APIFunction: trim
+ * Removes leading and trailing whitespace characters from a string.
+ *
+ * Parameters:
+ * str - {String} The (potentially) space padded string. This string is not
+ * modified.
+ *
+ * Returns:
+ * {String} A trimmed version of the string with all leading and
+ * trailing spaces removed.
+ */
+ trim: function(str) {
+ return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
+ },
+
+ /**
+ * APIFunction: camelize
+ * Camel-case a hyphenated string.
+ * Ex. "chicken-head" becomes "chickenHead", and
+ * "-chicken-head" becomes "ChickenHead".
+ *
+ * Parameters:
+ * str - {String} The string to be camelized. The original is not modified.
+ *
+ * Returns:
+ * {String} The string, camelized
+ */
+ camelize: function(str) {
+ var oStringList = str.split('-');
+ var camelizedString = oStringList[0];
+ for (var i=1, len=oStringList.length; i<len; i++) {
+ var s = oStringList[i];
+ camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
+ }
+ return camelizedString;
+ },
+
+ /**
+ * APIFunction: format
+ * Given a string with tokens in the form ${token}, return a string
+ * with tokens replaced with properties from the given context
+ * object. Represent a literal "${" by doubling it, e.g. "${${".
+ *
+ * Parameters:
+ * template - {String} A string with tokens to be replaced. A template
+ * has the form "literal ${token}" where the token will be replaced
+ * by the value of context["token"].
+ * context - {Object} An optional object with properties corresponding
+ * to the tokens in the format string. If no context is sent, the
+ * window object will be used.
+ * args - {Array} Optional arguments to pass to any functions found in
+ * the context. If a context property is a function, the token
+ * will be replaced by the return from the function called with
+ * these arguments.
+ *
+ * Returns:
+ * {String} A string with tokens replaced from the context object.
+ */
+ format: function(template, context, args) {
+ if(!context) {
+ context = window;
+ }
+
+ // Example matching:
+ // str = ${foo.bar}
+ // match = foo.bar
+ var replacer = function(str, match) {
+ var replacement;
+
+ // Loop through all subs. Example: ${a.b.c}
+ // 0 -> replacement = context[a];
+ // 1 -> replacement = context[a][b];
+ // 2 -> replacement = context[a][b][c];
+ var subs = match.split(/\.+/);
+ for (var i=0; i< subs.length; i++) {
+ if (i == 0) {
+ replacement = context;
+ }
+ if (replacement === undefined) {
+ break;
+ }
+ replacement = replacement[subs[i]];
+ }
+
+ if(typeof replacement == "function") {
+ replacement = args ?
+ replacement.apply(null, args) :
+ replacement();
+ }
+
+ // If replacement is undefined, return the string 'undefined'.
+ // This is a workaround for a bugs in browsers not properly
+ // dealing with non-participating groups in regular expressions:
+ // http://blog.stevenlevithan.com/archives/npcg-javascript
+ if (typeof replacement == 'undefined') {
+ return 'undefined';
+ } else {
+ return replacement;
+ }
+ };
+
+ return template.replace(OpenLayers.String.tokenRegEx, replacer);
+ },
+
+ /**
+ * Property: tokenRegEx
+ * Used to find tokens in a string.
+ * Examples: ${a}, ${a.b.c}, ${a-b}, ${5}
+ */
+ tokenRegEx: /\$\{([\w.]+?)\}/g,
+
+ /**
+ * Property: numberRegEx
+ * Used to test strings as numbers.
+ */
+ numberRegEx: /^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/,
+
+ /**
+ * APIFunction: isNumeric
+ * Determine whether a string contains only a numeric value.
+ *
+ * Examples:
+ * (code)
+ * OpenLayers.String.isNumeric("6.02e23") // true
+ * OpenLayers.String.isNumeric("12 dozen") // false
+ * OpenLayers.String.isNumeric("4") // true
+ * OpenLayers.String.isNumeric(" 4 ") // false
+ * (end)
+ *
+ * Returns:
+ * {Boolean} String contains only a number.
+ */
+ isNumeric: function(value) {
+ return OpenLayers.String.numberRegEx.test(value);
+ },
+
+ /**
+ * APIFunction: numericIf
+ * Converts a string that appears to be a numeric value into a number.
+ *
+ * Parameters:
+ * value - {String}
+ * trimWhitespace - {Boolean}
+ *
+ * Returns:
+ * {Number|String} a Number if the passed value is a number, a String
+ * otherwise.
+ */
+ numericIf: function(value, trimWhitespace) {
+ var originalValue = value;
+ if (trimWhitespace === true && value != null && value.replace) {
+ value = value.replace(/^\s*|\s*$/g, "");
+ }
+ return OpenLayers.String.isNumeric(value) ? parseFloat(value) : originalValue;
+ }
+
+};
+
+/**
+ * Namespace: OpenLayers.Number
+ * Contains convenience functions for manipulating numbers.
+ */
+OpenLayers.Number = {
+
+ /**
+ * Property: decimalSeparator
+ * Decimal separator to use when formatting numbers.
+ */
+ decimalSeparator: ".",
+
+ /**
+ * Property: thousandsSeparator
+ * Thousands separator to use when formatting numbers.
+ */
+ thousandsSeparator: ",",
+
+ /**
+ * APIFunction: limitSigDigs
+ * Limit the number of significant digits on a float.
+ *
+ * Parameters:
+ * num - {Float}
+ * sig - {Integer}
+ *
+ * Returns:
+ * {Float} The number, rounded to the specified number of significant
+ * digits.
+ */
+ limitSigDigs: function(num, sig) {
+ var fig = 0;
+ if (sig > 0) {
+ fig = parseFloat(num.toPrecision(sig));
+ }
+ return fig;
+ },
+
+ /**
+ * APIFunction: format
+ * Formats a number for output.
+ *
+ * Parameters:
+ * num - {Float}
+ * dec - {Integer} Number of decimal places to round to.
+ * Defaults to 0. Set to null to leave decimal places unchanged.
+ * tsep - {String} Thousands separator.
+ * Default is ",".
+ * dsep - {String} Decimal separator.
+ * Default is ".".
+ *
+ * Returns:
+ * {String} A string representing the formatted number.
+ */
+ format: function(num, dec, tsep, dsep) {
+ dec = (typeof dec != "undefined") ? dec : 0;
+ tsep = (typeof tsep != "undefined") ? tsep :
+ OpenLayers.Number.thousandsSeparator;
+ dsep = (typeof dsep != "undefined") ? dsep :
+ OpenLayers.Number.decimalSeparator;
+
+ if (dec != null) {
+ num = parseFloat(num.toFixed(dec));
+ }
+
+ var parts = num.toString().split(".");
+ if (parts.length == 1 && dec == null) {
+ // integer where we do not want to touch the decimals
+ dec = 0;
+ }
+
+ var integer = parts[0];
+ if (tsep) {
+ var thousands = /(-?[0-9]+)([0-9]{3})/;
+ while(thousands.test(integer)) {
+ integer = integer.replace(thousands, "$1" + tsep + "$2");
+ }
+ }
+
+ var str;
+ if (dec == 0) {
+ str = integer;
+ } else {
+ var rem = parts.length > 1 ? parts[1] : "0";
+ if (dec != null) {
+ rem = rem + new Array(dec - rem.length + 1).join("0");
+ }
+ str = integer + dsep + rem;
+ }
+ return str;
+ },
+
+ /**
+ * Method: zeroPad
+ * Create a zero padded string optionally with a radix for casting numbers.
+ *
+ * Parameters:
+ * num - {Number} The number to be zero padded.
+ * len - {Number} The length of the string to be returned.
+ * radix - {Number} An integer between 2 and 36 specifying the base to use
+ * for representing numeric values.
+ */
+ zeroPad: function(num, len, radix) {
+ var str = num.toString(radix || 10);
+ while (str.length < len) {
+ str = "0" + str;
+ }
+ return str;
+ }
+};
+
+/**
+ * Namespace: OpenLayers.Function
+ * Contains convenience functions for function manipulation.
+ */
+OpenLayers.Function = {
+ /**
+ * APIFunction: bind
+ * Bind a function to an object. Method to easily create closures with
+ * 'this' altered.
+ *
+ * Parameters:
+ * func - {Function} Input function.
+ * object - {Object} The object to bind to the input function (as this).
+ *
+ * Returns:
+ * {Function} A closure with 'this' set to the passed in object.
+ */
+ bind: function(func, object) {
+ // create a reference to all arguments past the second one
+ var args = Array.prototype.slice.apply(arguments, [2]);
+ return function() {
+ // Push on any additional arguments from the actual function call.
+ // These will come after those sent to the bind call.
+ var newArgs = args.concat(
+ Array.prototype.slice.apply(arguments, [0])
+ );
+ return func.apply(object, newArgs);
+ };
+ },
+
+ /**
+ * APIFunction: bindAsEventListener
+ * Bind a function to an object, and configure it to receive the event
+ * object as first parameter when called.
+ *
+ * Parameters:
+ * func - {Function} Input function to serve as an event listener.
+ * object - {Object} A reference to this.
+ *
+ * Returns:
+ * {Function}
+ */
+ bindAsEventListener: function(func, object) {
+ return function(event) {
+ return func.call(object, event || window.event);
+ };
+ },
+
+ /**
+ * APIFunction: False
+ * A simple function to that just does "return false". We use this to
+ * avoid attaching anonymous functions to DOM event handlers, which
+ * causes "issues" on IE<8.
+ *
+ * Usage:
+ * document.onclick = OpenLayers.Function.False;
+ *
+ * Returns:
+ * {Boolean}
+ */
+ False : function() {
+ return false;
+ },
+
+ /**
+ * APIFunction: True
+ * A simple function to that just does "return true". We use this to
+ * avoid attaching anonymous functions to DOM event handlers, which
+ * causes "issues" on IE<8.
+ *
+ * Usage:
+ * document.onclick = OpenLayers.Function.True;
+ *
+ * Returns:
+ * {Boolean}
+ */
+ True : function() {
+ return true;
+ },
+
+ /**
+ * APIFunction: Void
+ * A reusable function that returns ``undefined``.
+ *
+ * Returns:
+ * {undefined}
+ */
+ Void: function() {}
+
+};
+
+/**
+ * Namespace: OpenLayers.Array
+ * Contains convenience functions for array manipulation.
+ */
+OpenLayers.Array = {
+
+ /**
+ * APIMethod: filter
+ * Filter an array. Provides the functionality of the
+ * Array.prototype.filter extension to the ECMA-262 standard. Where
+ * available, Array.prototype.filter will be used.
+ *
+ * Based on well known example from http://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Array/filter
+ *
+ * Parameters:
+ * array - {Array} The array to be filtered. This array is not mutated.
+ * Elements added to this array by the callback will not be visited.
+ * callback - {Function} A function that is called for each element in
+ * the array. If this function returns true, the element will be
+ * included in the return. The function will be called with three
+ * arguments: the element in the array, the index of that element, and
+ * the array itself. If the optional caller parameter is specified
+ * the callback will be called with this set to caller.
+ * caller - {Object} Optional object to be set as this when the callback
+ * is called.
+ *
+ * Returns:
+ * {Array} An array of elements from the passed in array for which the
+ * callback returns true.
+ */
+ filter: function(array, callback, caller) {
+ var selected = [];
+ if (Array.prototype.filter) {
+ selected = array.filter(callback, caller);
+ } else {
+ var len = array.length;
+ if (typeof callback != "function") {
+ throw new TypeError();
+ }
+ for(var i=0; i<len; i++) {
+ if (i in array) {
+ var val = array[i];
+ if (callback.call(caller, val, i, array)) {
+ selected.push(val);
+ }
+ }
+ }
+ }
+ return selected;
+ }
+
+};
+/* ======================================================================
+ OpenLayers/BaseTypes/Class.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/SingleFile.js
+ */
+
+/**
+ * Constructor: OpenLayers.Class
+ * Base class used to construct all other classes. Includes support for
+ * multiple inheritance.
+ *
+ * This constructor is new in OpenLayers 2.5. At OpenLayers 3.0, the old
+ * syntax for creating classes and dealing with inheritance
+ * will be removed.
+ *
+ * To create a new OpenLayers-style class, use the following syntax:
+ * (code)
+ * var MyClass = OpenLayers.Class(prototype);
+ * (end)
+ *
+ * To create a new OpenLayers-style class with multiple inheritance, use the
+ * following syntax:
+ * (code)
+ * var MyClass = OpenLayers.Class(Class1, Class2, prototype);
+ * (end)
+ *
+ * Note that instanceof reflection will only reveal Class1 as superclass.
+ *
+ */
+OpenLayers.Class = function() {
+ var len = arguments.length;
+ var P = arguments[0];
+ var F = arguments[len-1];
+
+ var C = typeof F.initialize == "function" ?
+ F.initialize :
+ function(){ P.prototype.initialize.apply(this, arguments); };
+
+ if (len > 1) {
+ var newArgs = [C, P].concat(
+ Array.prototype.slice.call(arguments).slice(1, len-1), F);
+ OpenLayers.inherit.apply(null, newArgs);
+ } else {
+ C.prototype = F;
+ }
+ return C;
+};
+
+/**
+ * Function: OpenLayers.inherit
+ *
+ * Parameters:
+ * C - {Object} the class that inherits
+ * P - {Object} the superclass to inherit from
+ *
+ * In addition to the mandatory C and P parameters, an arbitrary number of
+ * objects can be passed, which will extend C.
+ */
+OpenLayers.inherit = function(C, P) {
+ var F = function() {};
+ F.prototype = P.prototype;
+ C.prototype = new F;
+ var i, l, o;
+ for(i=2, l=arguments.length; i<l; i++) {
+ o = arguments[i];
+ if(typeof o === "function") {
+ o = o.prototype;
+ }
+ OpenLayers.Util.extend(C.prototype, o);
+ }
+};
+
+/**
+ * APIFunction: extend
+ * Copy all properties of a source object to a destination object. Modifies
+ * the passed in destination object. Any properties on the source object
+ * that are set to undefined will not be (re)set on the destination object.
+ *
+ * Parameters:
+ * destination - {Object} The object that will be modified
+ * source - {Object} The object with properties to be set on the destination
+ *
+ * Returns:
+ * {Object} The destination object.
+ */
+OpenLayers.Util = OpenLayers.Util || {};
+OpenLayers.Util.extend = function(destination, source) {
+ destination = destination || {};
+ if (source) {
+ for (var property in source) {
+ var value = source[property];
+ if (value !== undefined) {
+ destination[property] = value;
+ }
+ }
+
+ /**
+ * IE doesn't include the toString property when iterating over an object's
+ * properties with the for(property in object) syntax. Explicitly check if
+ * the source has its own toString property.
+ */
+
+ /*
+ * FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative
+ * prototype object" when calling hawOwnProperty if the source object
+ * is an instance of window.Event.
+ */
+
+ var sourceIsEvt = typeof window.Event == "function"
+ && source instanceof window.Event;
+
+ if (!sourceIsEvt
+ && source.hasOwnProperty && source.hasOwnProperty("toString")) {
+ destination.toString = source.toString;
+ }
+ }
+ return destination;
+};
+/* ======================================================================
+ OpenLayers/BaseTypes/Bounds.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes/Class.js
+ */
+
+/**
+ * Class: OpenLayers.Bounds
+ * Instances of this class represent bounding boxes. Data stored as left,
+ * bottom, right, top floats. All values are initialized to null, however,
+ * you should make sure you set them before using the bounds for anything.
+ *
+ * Possible use case:
+ * (code)
+ * bounds = new OpenLayers.Bounds();
+ * bounds.extend(new OpenLayers.LonLat(4,5));
+ * bounds.extend(new OpenLayers.LonLat(5,6));
+ * bounds.toBBOX(); // returns 4,5,5,6
+ * (end)
+ */
+OpenLayers.Bounds = OpenLayers.Class({
+
+ /**
+ * Property: left
+ * {Number} Minimum horizontal coordinate.
+ */
+ left: null,
+
+ /**
+ * Property: bottom
+ * {Number} Minimum vertical coordinate.
+ */
+ bottom: null,
+
+ /**
+ * Property: right
+ * {Number} Maximum horizontal coordinate.
+ */
+ right: null,
+
+ /**
+ * Property: top
+ * {Number} Maximum vertical coordinate.
+ */
+ top: null,
+
+ /**
+ * Property: centerLonLat
+ * {<OpenLayers.LonLat>} A cached center location. This should not be
+ * accessed directly. Use <getCenterLonLat> instead.
+ */
+ centerLonLat: null,
+
+ /**
+ * Constructor: OpenLayers.Bounds
+ * Construct a new bounds object. Coordinates can either be passed as four
+ * arguments, or as a single argument.
+ *
+ * Parameters (four arguments):
+ * left - {Number} The left bounds of the box. Note that for width
+ * calculations, this is assumed to be less than the right value.
+ * bottom - {Number} The bottom bounds of the box. Note that for height
+ * calculations, this is assumed to be less than the top value.
+ * right - {Number} The right bounds.
+ * top - {Number} The top bounds.
+ *
+ * Parameters (single argument):
+ * bounds - {Array(Number)} [left, bottom, right, top]
+ */
+ initialize: function(left, bottom, right, top) {
+ if (OpenLayers.Util.isArray(left)) {
+ top = left[3];
+ right = left[2];
+ bottom = left[1];
+ left = left[0];
+ }
+ if (left != null) {
+ this.left = OpenLayers.Util.toFloat(left);
+ }
+ if (bottom != null) {
+ this.bottom = OpenLayers.Util.toFloat(bottom);
+ }
+ if (right != null) {
+ this.right = OpenLayers.Util.toFloat(right);
+ }
+ if (top != null) {
+ this.top = OpenLayers.Util.toFloat(top);
+ }
+ },
+
+ /**
+ * Method: clone
+ * Create a cloned instance of this bounds.
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} A fresh copy of the bounds
+ */
+ clone:function() {
+ return new OpenLayers.Bounds(this.left, this.bottom,
+ this.right, this.top);
+ },
+
+ /**
+ * Method: equals
+ * Test a two bounds for equivalence.
+ *
+ * Parameters:
+ * bounds - {<OpenLayers.Bounds>}
+ *
+ * Returns:
+ * {Boolean} The passed-in bounds object has the same left,
+ * right, top, bottom components as this. Note that if bounds
+ * passed in is null, returns false.
+ */
+ equals:function(bounds) {
+ var equals = false;
+ if (bounds != null) {
+ equals = ((this.left == bounds.left) &&
+ (this.right == bounds.right) &&
+ (this.top == bounds.top) &&
+ (this.bottom == bounds.bottom));
+ }
+ return equals;
+ },
+
+ /**
+ * APIMethod: toString
+ * Returns a string representation of the bounds object.
+ *
+ * Returns:
+ * {String} String representation of bounds object.
+ */
+ toString:function() {
+ return [this.left, this.bottom, this.right, this.top].join(",");
+ },
+
+ /**
+ * APIMethod: toArray
+ * Returns an array representation of the bounds object.
+ *
+ * Returns an array of left, bottom, right, top properties, or -- when the
+ * optional parameter is true -- an array of the bottom, left, top,
+ * right properties.
+ *
+ * Parameters:
+ * reverseAxisOrder - {Boolean} Should we reverse the axis order?
+ *
+ * Returns:
+ * {Array} array of left, bottom, right, top
+ */
+ toArray: function(reverseAxisOrder) {
+ if (reverseAxisOrder === true) {
+ return [this.bottom, this.left, this.top, this.right];
+ } else {
+ return [this.left, this.bottom, this.right, this.top];
+ }
+ },
+
+ /**
+ * APIMethod: toBBOX
+ * Returns a boundingbox-string representation of the bounds object.
+ *
+ * Parameters:
+ * decimal - {Integer} How many significant digits in the bbox coords?
+ * Default is 6
+ * reverseAxisOrder - {Boolean} Should we reverse the axis order?
+ *
+ * Returns:
+ * {String} Simple String representation of bounds object.
+ * (e.g. "5,42,10,45")
+ */
+ toBBOX:function(decimal, reverseAxisOrder) {
+ if (decimal== null) {
+ decimal = 6;
+ }
+ var mult = Math.pow(10, decimal);
+ var xmin = Math.round(this.left * mult) / mult;
+ var ymin = Math.round(this.bottom * mult) / mult;
+ var xmax = Math.round(this.right * mult) / mult;
+ var ymax = Math.round(this.top * mult) / mult;
+ if (reverseAxisOrder === true) {
+ return ymin + "," + xmin + "," + ymax + "," + xmax;
+ } else {
+ return xmin + "," + ymin + "," + xmax + "," + ymax;
+ }
+ },
+
+ /**
+ * APIMethod: toGeometry
+ * Create a new polygon geometry based on this bounds.
+ *
+ * Returns:
+ * {<OpenLayers.Geometry.Polygon>} A new polygon with the coordinates
+ * of this bounds.
+ */
+ toGeometry: function() {
+ return new OpenLayers.Geometry.Polygon([
+ new OpenLayers.Geometry.LinearRing([
+ new OpenLayers.Geometry.Point(this.left, this.bottom),
+ new OpenLayers.Geometry.Point(this.right, this.bottom),
+ new OpenLayers.Geometry.Point(this.right, this.top),
+ new OpenLayers.Geometry.Point(this.left, this.top)
+ ])
+ ]);
+ },
+
+ /**
+ * APIMethod: getWidth
+ * Returns the width of the bounds.
+ *
+ * Returns:
+ * {Float} The width of the bounds (right minus left).
+ */
+ getWidth:function() {
+ return (this.right - this.left);
+ },
+
+ /**
+ * APIMethod: getHeight
+ * Returns the height of the bounds.
+ *
+ * Returns:
+ * {Float} The height of the bounds (top minus bottom).
+ */
+ getHeight:function() {
+ return (this.top - this.bottom);
+ },
+
+ /**
+ * APIMethod: getSize
+ * Returns an <OpenLayers.Size> object of the bounds.
+ *
+ * Returns:
+ * {<OpenLayers.Size>} The size of the bounds.
+ */
+ getSize:function() {
+ return new OpenLayers.Size(this.getWidth(), this.getHeight());
+ },
+
+ /**
+ * APIMethod: getCenterPixel
+ * Returns the <OpenLayers.Pixel> object which represents the center of the
+ * bounds.
+ *
+ * Returns:
+ * {<OpenLayers.Pixel>} The center of the bounds in pixel space.
+ */
+ getCenterPixel:function() {
+ return new OpenLayers.Pixel( (this.left + this.right) / 2,
+ (this.bottom + this.top) / 2);
+ },
+
+ /**
+ * APIMethod: getCenterLonLat
+ * Returns the <OpenLayers.LonLat> object which represents the center of the
+ * bounds.
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>} The center of the bounds in map space.
+ */
+ getCenterLonLat:function() {
+ if(!this.centerLonLat) {
+ this.centerLonLat = new OpenLayers.LonLat(
+ (this.left + this.right) / 2, (this.bottom + this.top) / 2
+ );
+ }
+ return this.centerLonLat;
+ },
+
+ /**
+ * APIMethod: scale
+ * Scales the bounds around a pixel or lonlat. Note that the new
+ * bounds may return non-integer properties, even if a pixel
+ * is passed.
+ *
+ * Parameters:
+ * ratio - {Float}
+ * origin - {<OpenLayers.Pixel> or <OpenLayers.LonLat>}
+ * Default is center.
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} A new bounds that is scaled by ratio
+ * from origin.
+ */
+ scale: function(ratio, origin){
+ if(origin == null){
+ origin = this.getCenterLonLat();
+ }
+
+ var origx,origy;
+
+ // get origin coordinates
+ if(origin.CLASS_NAME == "OpenLayers.LonLat"){
+ origx = origin.lon;
+ origy = origin.lat;
+ } else {
+ origx = origin.x;
+ origy = origin.y;
+ }
+
+ var left = (this.left - origx) * ratio + origx;
+ var bottom = (this.bottom - origy) * ratio + origy;
+ var right = (this.right - origx) * ratio + origx;
+ var top = (this.top - origy) * ratio + origy;
+
+ return new OpenLayers.Bounds(left, bottom, right, top);
+ },
+
+ /**
+ * APIMethod: add
+ * Shifts the coordinates of the bound by the given horizontal and vertical
+ * deltas.
+ *
+ * (start code)
+ * var bounds = new OpenLayers.Bounds(0, 0, 10, 10);
+ * bounds.toString();
+ * // => "0,0,10,10"
+ *
+ * bounds.add(-1.5, 4).toString();
+ * // => "-1.5,4,8.5,14"
+ * (end)
+ *
+ * This method will throw a TypeError if it is passed null as an argument.
+ *
+ * Parameters:
+ * x - {Float} horizontal delta
+ * y - {Float} vertical delta
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} A new bounds whose coordinates are the same as
+ * this, but shifted by the passed-in x and y values.
+ */
+ add:function(x, y) {
+ if ( (x == null) || (y == null) ) {
+ throw new TypeError('Bounds.add cannot receive null values');
+ }
+ return new OpenLayers.Bounds(this.left + x, this.bottom + y,
+ this.right + x, this.top + y);
+ },
+
+ /**
+ * APIMethod: extend
+ * Extend the bounds to include the <OpenLayers.LonLat>,
+ * <OpenLayers.Geometry.Point> or <OpenLayers.Bounds> specified.
+ *
+ * Please note that this function assumes that left < right and
+ * bottom < top.
+ *
+ * Parameters:
+ * object - {<OpenLayers.LonLat>, <OpenLayers.Geometry.Point> or
+ * <OpenLayers.Bounds>} The object to be included in the new bounds
+ * object.
+ */
+ extend:function(object) {
+ if (object) {
+ switch(object.CLASS_NAME) {
+ case "OpenLayers.LonLat":
+ this.extendXY(object.lon, object.lat);
+ break;
+ case "OpenLayers.Geometry.Point":
+ this.extendXY(object.x, object.y);
+ break;
+
+ case "OpenLayers.Bounds":
+ // clear cached center location
+ this.centerLonLat = null;
+
+ if ( (this.left == null) || (object.left < this.left)) {
+ this.left = object.left;
+ }
+ if ( (this.bottom == null) || (object.bottom < this.bottom) ) {
+ this.bottom = object.bottom;
+ }
+ if ( (this.right == null) || (object.right > this.right) ) {
+ this.right = object.right;
+ }
+ if ( (this.top == null) || (object.top > this.top) ) {
+ this.top = object.top;
+ }
+ break;
+ }
+ }
+ },
+
+ /**
+ * APIMethod: extendXY
+ * Extend the bounds to include the XY coordinate specified.
+ *
+ * Parameters:
+ * x - {number} The X part of the the coordinate.
+ * y - {number} The Y part of the the coordinate.
+ */
+ extendXY:function(x, y) {
+ // clear cached center location
+ this.centerLonLat = null;
+
+ if ((this.left == null) || (x < this.left)) {
+ this.left = x;
+ }
+ if ((this.bottom == null) || (y < this.bottom)) {
+ this.bottom = y;
+ }
+ if ((this.right == null) || (x > this.right)) {
+ this.right = x;
+ }
+ if ((this.top == null) || (y > this.top)) {
+ this.top = y;
+ }
+ },
+
+ /**
+ * APIMethod: containsLonLat
+ * Returns whether the bounds object contains the given <OpenLayers.LonLat>.
+ *
+ * Parameters:
+ * ll - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
+ * object with a 'lon' and 'lat' properties.
+ * options - {Object} Optional parameters
+ *
+ * Acceptable options:
+ * inclusive - {Boolean} Whether or not to include the border.
+ * Default is true.
+ * worldBounds - {<OpenLayers.Bounds>} If a worldBounds is provided, the
+ * ll will be considered as contained if it exceeds the world bounds,
+ * but can be wrapped around the dateline so it is contained by this
+ * bounds.
+ *
+ * Returns:
+ * {Boolean} The passed-in lonlat is within this bounds.
+ */
+ containsLonLat: function(ll, options) {
+ if (typeof options === "boolean") {
+ options = {inclusive: options};
+ }
+ options = options || {};
+ var contains = this.contains(ll.lon, ll.lat, options.inclusive),
+ worldBounds = options.worldBounds;
+ if (worldBounds && !contains) {
+ var worldWidth = worldBounds.getWidth();
+ var worldCenterX = (worldBounds.left + worldBounds.right) / 2;
+ var worldsAway = Math.round((ll.lon - worldCenterX) / worldWidth);
+ contains = this.containsLonLat({
+ lon: ll.lon - worldsAway * worldWidth,
+ lat: ll.lat
+ }, {inclusive: options.inclusive});
+ }
+ return contains;
+ },
+
+ /**
+ * APIMethod: containsPixel
+ * Returns whether the bounds object contains the given <OpenLayers.Pixel>.
+ *
+ * Parameters:
+ * px - {<OpenLayers.Pixel>}
+ * inclusive - {Boolean} Whether or not to include the border. Default is
+ * true.
+ *
+ * Returns:
+ * {Boolean} The passed-in pixel is within this bounds.
+ */
+ containsPixel:function(px, inclusive) {
+ return this.contains(px.x, px.y, inclusive);
+ },
+
+ /**
+ * APIMethod: contains
+ * Returns whether the bounds object contains the given x and y.
+ *
+ * Parameters:
+ * x - {Float}
+ * y - {Float}
+ * inclusive - {Boolean} Whether or not to include the border. Default is
+ * true.
+ *
+ * Returns:
+ * {Boolean} Whether or not the passed-in coordinates are within this
+ * bounds.
+ */
+ contains:function(x, y, inclusive) {
+ //set default
+ if (inclusive == null) {
+ inclusive = true;
+ }
+
+ if (x == null || y == null) {
+ return false;
+ }
+
+ x = OpenLayers.Util.toFloat(x);
+ y = OpenLayers.Util.toFloat(y);
+
+ var contains = false;
+ if (inclusive) {
+ contains = ((x >= this.left) && (x <= this.right) &&
+ (y >= this.bottom) && (y <= this.top));
+ } else {
+ contains = ((x > this.left) && (x < this.right) &&
+ (y > this.bottom) && (y < this.top));
+ }
+ return contains;
+ },
+
+ /**
+ * APIMethod: intersectsBounds
+ * Determine whether the target bounds intersects this bounds. Bounds are
+ * considered intersecting if any of their edges intersect or if one
+ * bounds contains the other.
+ *
+ * Parameters:
+ * bounds - {<OpenLayers.Bounds>} The target bounds.
+ * options - {Object} Optional parameters.
+ *
+ * Acceptable options:
+ * inclusive - {Boolean} Treat coincident borders as intersecting. Default
+ * is true. If false, bounds that do not overlap but only touch at the
+ * border will not be considered as intersecting.
+ * worldBounds - {<OpenLayers.Bounds>} If a worldBounds is provided, two
+ * bounds will be considered as intersecting if they intersect when
+ * shifted to within the world bounds. This applies only to bounds that
+ * cross or are completely outside the world bounds.
+ *
+ * Returns:
+ * {Boolean} The passed-in bounds object intersects this bounds.
+ */
+ intersectsBounds:function(bounds, options) {
+ if (typeof options === "boolean") {
+ options = {inclusive: options};
+ }
+ options = options || {};
+ if (options.worldBounds) {
+ var self = this.wrapDateLine(options.worldBounds);
+ bounds = bounds.wrapDateLine(options.worldBounds);
+ } else {
+ self = this;
+ }
+ if (options.inclusive == null) {
+ options.inclusive = true;
+ }
+ var intersects = false;
+ var mightTouch = (
+ self.left == bounds.right ||
+ self.right == bounds.left ||
+ self.top == bounds.bottom ||
+ self.bottom == bounds.top
+ );
+
+ // if the two bounds only touch at an edge, and inclusive is false,
+ // then the bounds don't *really* intersect.
+ if (options.inclusive || !mightTouch) {
+ // otherwise, if one of the boundaries even partially contains another,
+ // inclusive of the edges, then they do intersect.
+ var inBottom = (
+ ((bounds.bottom >= self.bottom) && (bounds.bottom <= self.top)) ||
+ ((self.bottom >= bounds.bottom) && (self.bottom <= bounds.top))
+ );
+ var inTop = (
+ ((bounds.top >= self.bottom) && (bounds.top <= self.top)) ||
+ ((self.top > bounds.bottom) && (self.top < bounds.top))
+ );
+ var inLeft = (
+ ((bounds.left >= self.left) && (bounds.left <= self.right)) ||
+ ((self.left >= bounds.left) && (self.left <= bounds.right))
+ );
+ var inRight = (
+ ((bounds.right >= self.left) && (bounds.right <= self.right)) ||
+ ((self.right >= bounds.left) && (self.right <= bounds.right))
+ );
+ intersects = ((inBottom || inTop) && (inLeft || inRight));
+ }
+ // document me
+ if (options.worldBounds && !intersects) {
+ var world = options.worldBounds;
+ var width = world.getWidth();
+ var selfCrosses = !world.containsBounds(self);
+ var boundsCrosses = !world.containsBounds(bounds);
+ if (selfCrosses && !boundsCrosses) {
+ bounds = bounds.add(-width, 0);
+ intersects = self.intersectsBounds(bounds, {inclusive: options.inclusive});
+ } else if (boundsCrosses && !selfCrosses) {
+ self = self.add(-width, 0);
+ intersects = bounds.intersectsBounds(self, {inclusive: options.inclusive});
+ }
+ }
+ return intersects;
+ },
+
+ /**
+ * APIMethod: containsBounds
+ * Returns whether the bounds object contains the given <OpenLayers.Bounds>.
+ *
+ * bounds - {<OpenLayers.Bounds>} The target bounds.
+ * partial - {Boolean} If any of the target corners is within this bounds
+ * consider the bounds contained. Default is false. If false, the
+ * entire target bounds must be contained within this bounds.
+ * inclusive - {Boolean} Treat shared edges as contained. Default is
+ * true.
+ *
+ * Returns:
+ * {Boolean} The passed-in bounds object is contained within this bounds.
+ */
+ containsBounds:function(bounds, partial, inclusive) {
+ if (partial == null) {
+ partial = false;
+ }
+ if (inclusive == null) {
+ inclusive = true;
+ }
+ var bottomLeft = this.contains(bounds.left, bounds.bottom, inclusive);
+ var bottomRight = this.contains(bounds.right, bounds.bottom, inclusive);
+ var topLeft = this.contains(bounds.left, bounds.top, inclusive);
+ var topRight = this.contains(bounds.right, bounds.top, inclusive);
+
+ return (partial) ? (bottomLeft || bottomRight || topLeft || topRight)
+ : (bottomLeft && bottomRight && topLeft && topRight);
+ },
+
+ /**
+ * APIMethod: determineQuadrant
+ * Returns the the quadrant ("br", "tr", "tl", "bl") in which the given
+ * <OpenLayers.LonLat> lies.
+ *
+ * Parameters:
+ * lonlat - {<OpenLayers.LonLat>}
+ *
+ * Returns:
+ * {String} The quadrant ("br" "tr" "tl" "bl") of the bounds in which the
+ * coordinate lies.
+ */
+ determineQuadrant: function(lonlat) {
+
+ var quadrant = "";
+ var center = this.getCenterLonLat();
+
+ quadrant += (lonlat.lat < center.lat) ? "b" : "t";
+ quadrant += (lonlat.lon < center.lon) ? "l" : "r";
+
+ return quadrant;
+ },
+
+ /**
+ * APIMethod: transform
+ * Transform the Bounds object from source to dest.
+ *
+ * Parameters:
+ * source - {<OpenLayers.Projection>} Source projection.
+ * dest - {<OpenLayers.Projection>} Destination projection.
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} Itself, for use in chaining operations.
+ */
+ transform: function(source, dest) {
+ // clear cached center location
+ this.centerLonLat = null;
+ var ll = OpenLayers.Projection.transform(
+ {'x': this.left, 'y': this.bottom}, source, dest);
+ var lr = OpenLayers.Projection.transform(
+ {'x': this.right, 'y': this.bottom}, source, dest);
+ var ul = OpenLayers.Projection.transform(
+ {'x': this.left, 'y': this.top}, source, dest);
+ var ur = OpenLayers.Projection.transform(
+ {'x': this.right, 'y': this.top}, source, dest);
+ this.left = Math.min(ll.x, ul.x);
+ this.bottom = Math.min(ll.y, lr.y);
+ this.right = Math.max(lr.x, ur.x);
+ this.top = Math.max(ul.y, ur.y);
+ return this;
+ },
+
+ /**
+ * APIMethod: wrapDateLine
+ * Wraps the bounds object around the dateline.
+ *
+ * Parameters:
+ * maxExtent - {<OpenLayers.Bounds>}
+ * options - {Object} Some possible options are:
+ *
+ * Allowed Options:
+ * leftTolerance - {float} Allow for a margin of error
+ * with the 'left' value of this
+ * bound.
+ * Default is 0.
+ * rightTolerance - {float} Allow for a margin of error
+ * with the 'right' value of
+ * this bound.
+ * Default is 0.
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} A copy of this bounds, but wrapped around the
+ * "dateline" (as specified by the borders of
+ * maxExtent). Note that this function only returns
+ * a different bounds value if this bounds is
+ * *entirely* outside of the maxExtent. If this
+ * bounds straddles the dateline (is part in/part
+ * out of maxExtent), the returned bounds will always
+ * cross the left edge of the given maxExtent.
+ *.
+ */
+ wrapDateLine: function(maxExtent, options) {
+ options = options || {};
+
+ var leftTolerance = options.leftTolerance || 0;
+ var rightTolerance = options.rightTolerance || 0;
+
+ var newBounds = this.clone();
+
+ if (maxExtent) {
+ var width = maxExtent.getWidth();
+
+ //shift right?
+ while (newBounds.left < maxExtent.left &&
+ newBounds.right - rightTolerance <= maxExtent.left ) {
+ newBounds = newBounds.add(width, 0);
+ }
+
+ //shift left?
+ while (newBounds.left + leftTolerance >= maxExtent.right &&
+ newBounds.right > maxExtent.right ) {
+ newBounds = newBounds.add(-width, 0);
+ }
+
+ // crosses right only? force left
+ var newLeft = newBounds.left + leftTolerance;
+ if (newLeft < maxExtent.right && newLeft > maxExtent.left &&
+ newBounds.right - rightTolerance > maxExtent.right) {
+ newBounds = newBounds.add(-width, 0);
+ }
+ }
+
+ return newBounds;
+ },
+
+ CLASS_NAME: "OpenLayers.Bounds"
+});
+
+/**
+ * APIFunction: fromString
+ * Alternative constructor that builds a new OpenLayers.Bounds from a
+ * parameter string.
+ *
+ * (begin code)
+ * OpenLayers.Bounds.fromString("5,42,10,45");
+ * // => equivalent to ...
+ * new OpenLayers.Bounds(5, 42, 10, 45);
+ * (end)
+ *
+ * Parameters:
+ * str - {String} Comma-separated bounds string. (e.g. "5,42,10,45")
+ * reverseAxisOrder - {Boolean} Does the string use reverse axis order?
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} New bounds object built from the
+ * passed-in String.
+ */
+OpenLayers.Bounds.fromString = function(str, reverseAxisOrder) {
+ var bounds = str.split(",");
+ return OpenLayers.Bounds.fromArray(bounds, reverseAxisOrder);
+};
+
+/**
+ * APIFunction: fromArray
+ * Alternative constructor that builds a new OpenLayers.Bounds from an array.
+ *
+ * (begin code)
+ * OpenLayers.Bounds.fromArray( [5, 42, 10, 45] );
+ * // => equivalent to ...
+ * new OpenLayers.Bounds(5, 42, 10, 45);
+ * (end)
+ *
+ * Parameters:
+ * bbox - {Array(Float)} Array of bounds values (e.g. [5,42,10,45])
+ * reverseAxisOrder - {Boolean} Does the array use reverse axis order?
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} New bounds object built from the passed-in Array.
+ */
+OpenLayers.Bounds.fromArray = function(bbox, reverseAxisOrder) {
+ return reverseAxisOrder === true ?
+ new OpenLayers.Bounds(bbox[1], bbox[0], bbox[3], bbox[2]) :
+ new OpenLayers.Bounds(bbox[0], bbox[1], bbox[2], bbox[3]);
+};
+
+/**
+ * APIFunction: fromSize
+ * Alternative constructor that builds a new OpenLayers.Bounds from a size.
+ *
+ * (begin code)
+ * OpenLayers.Bounds.fromSize( new OpenLayers.Size(10, 20) );
+ * // => equivalent to ...
+ * new OpenLayers.Bounds(0, 20, 10, 0);
+ * (end)
+ *
+ * Parameters:
+ * size - {<OpenLayers.Size> or Object} <OpenLayers.Size> or an object with
+ * both 'w' and 'h' properties.
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} New bounds object built from the passed-in size.
+ */
+OpenLayers.Bounds.fromSize = function(size) {
+ return new OpenLayers.Bounds(0,
+ size.h,
+ size.w,
+ 0);
+};
+
+/**
+ * Function: oppositeQuadrant
+ * Get the opposite quadrant for a given quadrant string.
+ *
+ * (begin code)
+ * OpenLayers.Bounds.oppositeQuadrant( "tl" );
+ * // => "br"
+ *
+ * OpenLayers.Bounds.oppositeQuadrant( "tr" );
+ * // => "bl"
+ * (end)
+ *
+ * Parameters:
+ * quadrant - {String} two character quadrant shortstring
+ *
+ * Returns:
+ * {String} The opposing quadrant ("br" "tr" "tl" "bl"). For Example, if
+ * you pass in "bl" it returns "tr", if you pass in "br" it
+ * returns "tl", etc.
+ */
+OpenLayers.Bounds.oppositeQuadrant = function(quadrant) {
+ var opp = "";
+
+ opp += (quadrant.charAt(0) == 't') ? 'b' : 't';
+ opp += (quadrant.charAt(1) == 'l') ? 'r' : 'l';
+
+ return opp;
+};
+/* ======================================================================
+ OpenLayers/BaseTypes/Element.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/Util.js
+ * @requires OpenLayers/BaseTypes.js
+ */
+
+/**
+ * Namespace: OpenLayers.Element
+ */
+OpenLayers.Element = {
+
+ /**
+ * APIFunction: visible
+ *
+ * Parameters:
+ * element - {DOMElement}
+ *
+ * Returns:
+ * {Boolean} Is the element visible?
+ */
+ visible: function(element) {
+ return OpenLayers.Util.getElement(element).style.display != 'none';
+ },
+
+ /**
+ * APIFunction: toggle
+ * Toggle the visibility of element(s) passed in
+ *
+ * Parameters:
+ * element - {DOMElement} Actually user can pass any number of elements
+ */
+ toggle: function() {
+ for (var i=0, len=arguments.length; i<len; i++) {
+ var element = OpenLayers.Util.getElement(arguments[i]);
+ var display = OpenLayers.Element.visible(element) ? 'none'
+ : '';
+ element.style.display = display;
+ }
+ },
+
+ /**
+ * APIFunction: remove
+ * Remove the specified element from the DOM.
+ *
+ * Parameters:
+ * element - {DOMElement}
+ */
+ remove: function(element) {
+ element = OpenLayers.Util.getElement(element);
+ element.parentNode.removeChild(element);
+ },
+
+ /**
+ * APIFunction: getHeight
+ *
+ * Parameters:
+ * element - {DOMElement}
+ *
+ * Returns:
+ * {Integer} The offset height of the element passed in
+ */
+ getHeight: function(element) {
+ element = OpenLayers.Util.getElement(element);
+ return element.offsetHeight;
+ },
+
+ /**
+ * Function: hasClass
+ * Tests if an element has the given CSS class name.
+ *
+ * Parameters:
+ * element - {DOMElement} A DOM element node.
+ * name - {String} The CSS class name to search for.
+ *
+ * Returns:
+ * {Boolean} The element has the given class name.
+ */
+ hasClass: function(element, name) {
+ var names = element.className;
+ return (!!names && new RegExp("(^|\\s)" + name + "(\\s|$)").test(names));
+ },
+
+ /**
+ * Function: addClass
+ * Add a CSS class name to an element. Safe where element already has
+ * the class name.
+ *
+ * Parameters:
+ * element - {DOMElement} A DOM element node.
+ * name - {String} The CSS class name to add.
+ *
+ * Returns:
+ * {DOMElement} The element.
+ */
+ addClass: function(element, name) {
+ if(!OpenLayers.Element.hasClass(element, name)) {
+ element.className += (element.className ? " " : "") + name;
+ }
+ return element;
+ },
+
+ /**
+ * Function: removeClass
+ * Remove a CSS class name from an element. Safe where element does not
+ * have the class name.
+ *
+ * Parameters:
+ * element - {DOMElement} A DOM element node.
+ * name - {String} The CSS class name to remove.
+ *
+ * Returns:
+ * {DOMElement} The element.
+ */
+ removeClass: function(element, name) {
+ var names = element.className;
+ if(names) {
+ element.className = OpenLayers.String.trim(
+ names.replace(
+ new RegExp("(^|\\s+)" + name + "(\\s+|$)"), " "
+ )
+ );
+ }
+ return element;
+ },
+
+ /**
+ * Function: toggleClass
+ * Remove a CSS class name from an element if it exists. Add the class name
+ * if it doesn't exist.
+ *
+ * Parameters:
+ * element - {DOMElement} A DOM element node.
+ * name - {String} The CSS class name to toggle.
+ *
+ * Returns:
+ * {DOMElement} The element.
+ */
+ toggleClass: function(element, name) {
+ if(OpenLayers.Element.hasClass(element, name)) {
+ OpenLayers.Element.removeClass(element, name);
+ } else {
+ OpenLayers.Element.addClass(element, name);
+ }
+ return element;
+ },
+
+ /**
+ * APIFunction: getStyle
+ *
+ * Parameters:
+ * element - {DOMElement}
+ * style - {?}
+ *
+ * Returns:
+ * {?}
+ */
+ getStyle: function(element, style) {
+ element = OpenLayers.Util.getElement(element);
+
+ var value = null;
+ if (element && element.style) {
+ value = element.style[OpenLayers.String.camelize(style)];
+ if (!value) {
+ if (document.defaultView &&
+ document.defaultView.getComputedStyle) {
+
+ var css = document.defaultView.getComputedStyle(element, null);
+ value = css ? css.getPropertyValue(style) : null;
+ } else if (element.currentStyle) {
+ value = element.currentStyle[OpenLayers.String.camelize(style)];
+ }
+ }
+
+ var positions = ['left', 'top', 'right', 'bottom'];
+ if (window.opera &&
+ (OpenLayers.Util.indexOf(positions,style) != -1) &&
+ (OpenLayers.Element.getStyle(element, 'position') == 'static')) {
+ value = 'auto';
+ }
+ }
+
+ return value == 'auto' ? null : value;
+ }
+
+};
+/* ======================================================================
+ OpenLayers/BaseTypes/LonLat.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes/Class.js
+ */
+
+/**
+ * Class: OpenLayers.LonLat
+ * This class represents a longitude and latitude pair
+ */
+OpenLayers.LonLat = OpenLayers.Class({
+
+ /**
+ * APIProperty: lon
+ * {Float} The x-axis coodinate in map units
+ */
+ lon: 0.0,
+
+ /**
+ * APIProperty: lat
+ * {Float} The y-axis coordinate in map units
+ */
+ lat: 0.0,
+
+ /**
+ * Constructor: OpenLayers.LonLat
+ * Create a new map location. Coordinates can be passed either as two
+ * arguments, or as a single argument.
+ *
+ * Parameters (two arguments):
+ * lon - {Number} The x-axis coordinate in map units. If your map is in
+ * a geographic projection, this will be the Longitude. Otherwise,
+ * it will be the x coordinate of the map location in your map units.
+ * lat - {Number} The y-axis coordinate in map units. If your map is in
+ * a geographic projection, this will be the Latitude. Otherwise,
+ * it will be the y coordinate of the map location in your map units.
+ *
+ * Parameters (single argument):
+ * location - {Array(Float)} [lon, lat]
+ */
+ initialize: function(lon, lat) {
+ if (OpenLayers.Util.isArray(lon)) {
+ lat = lon[1];
+ lon = lon[0];
+ }
+ this.lon = OpenLayers.Util.toFloat(lon);
+ this.lat = OpenLayers.Util.toFloat(lat);
+ },
+
+ /**
+ * Method: toString
+ * Return a readable string version of the lonlat
+ *
+ * Returns:
+ * {String} String representation of OpenLayers.LonLat object.
+ * (e.g. <i>"lon=5,lat=42"</i>)
+ */
+ toString:function() {
+ return ("lon=" + this.lon + ",lat=" + this.lat);
+ },
+
+ /**
+ * APIMethod: toShortString
+ *
+ * Returns:
+ * {String} Shortened String representation of OpenLayers.LonLat object.
+ * (e.g. <i>"5, 42"</i>)
+ */
+ toShortString:function() {
+ return (this.lon + ", " + this.lat);
+ },
+
+ /**
+ * APIMethod: clone
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>} New OpenLayers.LonLat object with the same lon
+ * and lat values
+ */
+ clone:function() {
+ return new OpenLayers.LonLat(this.lon, this.lat);
+ },
+
+ /**
+ * APIMethod: add
+ *
+ * Parameters:
+ * lon - {Float}
+ * lat - {Float}
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>} A new OpenLayers.LonLat object with the lon and
+ * lat passed-in added to this's.
+ */
+ add:function(lon, lat) {
+ if ( (lon == null) || (lat == null) ) {
+ throw new TypeError('LonLat.add cannot receive null values');
+ }
+ return new OpenLayers.LonLat(this.lon + OpenLayers.Util.toFloat(lon),
+ this.lat + OpenLayers.Util.toFloat(lat));
+ },
+
+ /**
+ * APIMethod: equals
+ *
+ * Parameters:
+ * ll - {<OpenLayers.LonLat>}
+ *
+ * Returns:
+ * {Boolean} Boolean value indicating whether the passed-in
+ * <OpenLayers.LonLat> object has the same lon and lat
+ * components as this.
+ * Note: if ll passed in is null, returns false
+ */
+ equals:function(ll) {
+ var equals = false;
+ if (ll != null) {
+ equals = ((this.lon == ll.lon && this.lat == ll.lat) ||
+ (isNaN(this.lon) && isNaN(this.lat) && isNaN(ll.lon) && isNaN(ll.lat)));
+ }
+ return equals;
+ },
+
+ /**
+ * APIMethod: transform
+ * Transform the LonLat object from source to dest. This transformation is
+ * *in place*: if you want a *new* lonlat, use .clone() first.
+ *
+ * Parameters:
+ * source - {<OpenLayers.Projection>} Source projection.
+ * dest - {<OpenLayers.Projection>} Destination projection.
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>} Itself, for use in chaining operations.
+ */
+ transform: function(source, dest) {
+ var point = OpenLayers.Projection.transform(
+ {'x': this.lon, 'y': this.lat}, source, dest);
+ this.lon = point.x;
+ this.lat = point.y;
+ return this;
+ },
+
+ /**
+ * APIMethod: wrapDateLine
+ *
+ * Parameters:
+ * maxExtent - {<OpenLayers.Bounds>}
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>} A copy of this lonlat, but wrapped around the
+ * "dateline" (as specified by the borders of
+ * maxExtent)
+ */
+ wrapDateLine: function(maxExtent) {
+
+ var newLonLat = this.clone();
+
+ if (maxExtent) {
+ //shift right?
+ while (newLonLat.lon < maxExtent.left) {
+ newLonLat.lon += maxExtent.getWidth();
+ }
+
+ //shift left?
+ while (newLonLat.lon > maxExtent.right) {
+ newLonLat.lon -= maxExtent.getWidth();
+ }
+ }
+
+ return newLonLat;
+ },
+
+ CLASS_NAME: "OpenLayers.LonLat"
+});
+
+/**
+ * Function: fromString
+ * Alternative constructor that builds a new <OpenLayers.LonLat> from a
+ * parameter string
+ *
+ * Parameters:
+ * str - {String} Comma-separated Lon,Lat coordinate string.
+ * (e.g. <i>"5,40"</i>)
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>} New <OpenLayers.LonLat> object built from the
+ * passed-in String.
+ */
+OpenLayers.LonLat.fromString = function(str) {
+ var pair = str.split(",");
+ return new OpenLayers.LonLat(pair[0], pair[1]);
+};
+
+/**
+ * Function: fromArray
+ * Alternative constructor that builds a new <OpenLayers.LonLat> from an
+ * array of two numbers that represent lon- and lat-values.
+ *
+ * Parameters:
+ * arr - {Array(Float)} Array of lon/lat values (e.g. [5,-42])
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>} New <OpenLayers.LonLat> object built from the
+ * passed-in array.
+ */
+OpenLayers.LonLat.fromArray = function(arr) {
+ var gotArr = OpenLayers.Util.isArray(arr),
+ lon = gotArr && arr[0],
+ lat = gotArr && arr[1];
+ return new OpenLayers.LonLat(lon, lat);
+};
+/* ======================================================================
+ OpenLayers/BaseTypes/Pixel.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes/Class.js
+ */
+
+/**
+ * Class: OpenLayers.Pixel
+ * This class represents a screen coordinate, in x and y coordinates
+ */
+OpenLayers.Pixel = OpenLayers.Class({
+
+ /**
+ * APIProperty: x
+ * {Number} The x coordinate
+ */
+ x: 0.0,
+
+ /**
+ * APIProperty: y
+ * {Number} The y coordinate
+ */
+ y: 0.0,
+
+ /**
+ * Constructor: OpenLayers.Pixel
+ * Create a new OpenLayers.Pixel instance
+ *
+ * Parameters:
+ * x - {Number} The x coordinate
+ * y - {Number} The y coordinate
+ *
+ * Returns:
+ * An instance of OpenLayers.Pixel
+ */
+ initialize: function(x, y) {
+ this.x = parseFloat(x);
+ this.y = parseFloat(y);
+ },
+
+ /**
+ * Method: toString
+ * Cast this object into a string
+ *
+ * Returns:
+ * {String} The string representation of Pixel. ex: "x=200.4,y=242.2"
+ */
+ toString:function() {
+ return ("x=" + this.x + ",y=" + this.y);
+ },
+
+ /**
+ * APIMethod: clone
+ * Return a clone of this pixel object
+ *
+ * Returns:
+ * {<OpenLayers.Pixel>} A clone pixel
+ */
+ clone:function() {
+ return new OpenLayers.Pixel(this.x, this.y);
+ },
+
+ /**
+ * APIMethod: equals
+ * Determine whether one pixel is equivalent to another
+ *
+ * Parameters:
+ * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
+ * a 'x' and 'y' properties.
+ *
+ * Returns:
+ * {Boolean} The point passed in as parameter is equal to this. Note that
+ * if px passed in is null, returns false.
+ */
+ equals:function(px) {
+ var equals = false;
+ if (px != null) {
+ equals = ((this.x == px.x && this.y == px.y) ||
+ (isNaN(this.x) && isNaN(this.y) && isNaN(px.x) && isNaN(px.y)));
+ }
+ return equals;
+ },
+
+ /**
+ * APIMethod: distanceTo
+ * Returns the distance to the pixel point passed in as a parameter.
+ *
+ * Parameters:
+ * px - {<OpenLayers.Pixel>}
+ *
+ * Returns:
+ * {Float} The pixel point passed in as parameter to calculate the
+ * distance to.
+ */
+ distanceTo:function(px) {
+ return Math.sqrt(
+ Math.pow(this.x - px.x, 2) +
+ Math.pow(this.y - px.y, 2)
+ );
+ },
+
+ /**
+ * APIMethod: add
+ *
+ * Parameters:
+ * x - {Integer}
+ * y - {Integer}
+ *
+ * Returns:
+ * {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the
+ * values passed in.
+ */
+ add:function(x, y) {
+ if ( (x == null) || (y == null) ) {
+ throw new TypeError('Pixel.add cannot receive null values');
+ }
+ return new OpenLayers.Pixel(this.x + x, this.y + y);
+ },
+
+ /**
+ * APIMethod: offset
+ *
+ * Parameters
+ * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
+ * a 'x' and 'y' properties.
+ *
+ * Returns:
+ * {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the
+ * x&y values of the pixel passed in.
+ */
+ offset:function(px) {
+ var newPx = this.clone();
+ if (px) {
+ newPx = this.add(px.x, px.y);
+ }
+ return newPx;
+ },
+
+ CLASS_NAME: "OpenLayers.Pixel"
+});
+/* ======================================================================
+ OpenLayers/BaseTypes/Size.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes/Class.js
+ */
+
+/**
+ * Class: OpenLayers.Size
+ * Instances of this class represent a width/height pair
+ */
+OpenLayers.Size = OpenLayers.Class({
+
+ /**
+ * APIProperty: w
+ * {Number} width
+ */
+ w: 0.0,
+
+ /**
+ * APIProperty: h
+ * {Number} height
+ */
+ h: 0.0,
+
+
+ /**
+ * Constructor: OpenLayers.Size
+ * Create an instance of OpenLayers.Size
+ *
+ * Parameters:
+ * w - {Number} width
+ * h - {Number} height
+ */
+ initialize: function(w, h) {
+ this.w = parseFloat(w);
+ this.h = parseFloat(h);
+ },
+
+ /**
+ * Method: toString
+ * Return the string representation of a size object
+ *
+ * Returns:
+ * {String} The string representation of OpenLayers.Size object.
+ * (e.g. <i>"w=55,h=66"</i>)
+ */
+ toString:function() {
+ return ("w=" + this.w + ",h=" + this.h);
+ },
+
+ /**
+ * APIMethod: clone
+ * Create a clone of this size object
+ *
+ * Returns:
+ * {<OpenLayers.Size>} A new OpenLayers.Size object with the same w and h
+ * values
+ */
+ clone:function() {
+ return new OpenLayers.Size(this.w, this.h);
+ },
+
+ /**
+ *
+ * APIMethod: equals
+ * Determine where this size is equal to another
+ *
+ * Parameters:
+ * sz - {<OpenLayers.Size>|Object} An OpenLayers.Size or an object with
+ * a 'w' and 'h' properties.
+ *
+ * Returns:
+ * {Boolean} The passed in size has the same h and w properties as this one.
+ * Note that if sz passed in is null, returns false.
+ */
+ equals:function(sz) {
+ var equals = false;
+ if (sz != null) {
+ equals = ((this.w == sz.w && this.h == sz.h) ||
+ (isNaN(this.w) && isNaN(this.h) && isNaN(sz.w) && isNaN(sz.h)));
+ }
+ return equals;
+ },
+
+ CLASS_NAME: "OpenLayers.Size"
+});
+/* ======================================================================
+ OpenLayers/Console.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes/Class.js
+ */
+
+/**
+ * Namespace: OpenLayers.Console
+ * The OpenLayers.Console namespace is used for debugging and error logging.
+ * If the Firebug Lite (../Firebug/firebug.js) is included before this script,
+ * calls to OpenLayers.Console methods will get redirected to window.console.
+ * This makes use of the Firebug extension where available and allows for
+ * cross-browser debugging Firebug style.
+ *
+ * Note:
+ * Note that behavior will differ with the Firebug extention and Firebug Lite.
+ * Most notably, the Firebug Lite console does not currently allow for
+ * hyperlinks to code or for clicking on object to explore their properties.
+ *
+ */
+OpenLayers.Console = {
+ /**
+ * Create empty functions for all console methods. The real value of these
+ * properties will be set if Firebug Lite (../Firebug/firebug.js script) is
+ * included. We explicitly require the Firebug Lite script to trigger
+ * functionality of the OpenLayers.Console methods.
+ */
+
+ /**
+ * APIFunction: log
+ * Log an object in the console. The Firebug Lite console logs string
+ * representation of objects. Given multiple arguments, they will
+ * be cast to strings and logged with a space delimiter. If the first
+ * argument is a string with printf-like formatting, subsequent arguments
+ * will be used in string substitution. Any additional arguments (beyond
+ * the number substituted in a format string) will be appended in a space-
+ * delimited line.
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ log: function() {},
+
+ /**
+ * APIFunction: debug
+ * Writes a message to the console, including a hyperlink to the line
+ * where it was called.
+ *
+ * May be called with multiple arguments as with OpenLayers.Console.log().
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ debug: function() {},
+
+ /**
+ * APIFunction: info
+ * Writes a message to the console with the visual "info" icon and color
+ * coding and a hyperlink to the line where it was called.
+ *
+ * May be called with multiple arguments as with OpenLayers.Console.log().
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ info: function() {},
+
+ /**
+ * APIFunction: warn
+ * Writes a message to the console with the visual "warning" icon and
+ * color coding and a hyperlink to the line where it was called.
+ *
+ * May be called with multiple arguments as with OpenLayers.Console.log().
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ warn: function() {},
+
+ /**
+ * APIFunction: error
+ * Writes a message to the console with the visual "error" icon and color
+ * coding and a hyperlink to the line where it was called.
+ *
+ * May be called with multiple arguments as with OpenLayers.Console.log().
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ error: function() {},
+
+ /**
+ * APIFunction: userError
+ * A single interface for showing error messages to the user. The default
+ * behavior is a Javascript alert, though this can be overridden by
+ * reassigning OpenLayers.Console.userError to a different function.
+ *
+ * Expects a single error message
+ *
+ * Parameters:
+ * error - {Object}
+ */
+ userError: function(error) {
+ alert(error);
+ },
+
+ /**
+ * APIFunction: assert
+ * Tests that an expression is true. If not, it will write a message to
+ * the console and throw an exception.
+ *
+ * May be called with multiple arguments as with OpenLayers.Console.log().
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ assert: function() {},
+
+ /**
+ * APIFunction: dir
+ * Prints an interactive listing of all properties of the object. This
+ * looks identical to the view that you would see in the DOM tab.
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ dir: function() {},
+
+ /**
+ * APIFunction: dirxml
+ * Prints the XML source tree of an HTML or XML element. This looks
+ * identical to the view that you would see in the HTML tab. You can click
+ * on any node to inspect it in the HTML tab.
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ dirxml: function() {},
+
+ /**
+ * APIFunction: trace
+ * Prints an interactive stack trace of JavaScript execution at the point
+ * where it is called. The stack trace details the functions on the stack,
+ * as well as the values that were passed as arguments to each function.
+ * You can click each function to take you to its source in the Script tab,
+ * and click each argument value to inspect it in the DOM or HTML tabs.
+ *
+ */
+ trace: function() {},
+
+ /**
+ * APIFunction: group
+ * Writes a message to the console and opens a nested block to indent all
+ * future messages sent to the console. Call OpenLayers.Console.groupEnd()
+ * to close the block.
+ *
+ * May be called with multiple arguments as with OpenLayers.Console.log().
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ group: function() {},
+
+ /**
+ * APIFunction: groupEnd
+ * Closes the most recently opened block created by a call to
+ * OpenLayers.Console.group
+ */
+ groupEnd: function() {},
+
+ /**
+ * APIFunction: time
+ * Creates a new timer under the given name. Call
+ * OpenLayers.Console.timeEnd(name)
+ * with the same name to stop the timer and print the time elapsed.
+ *
+ * Parameters:
+ * name - {String}
+ */
+ time: function() {},
+
+ /**
+ * APIFunction: timeEnd
+ * Stops a timer created by a call to OpenLayers.Console.time(name) and
+ * writes the time elapsed.
+ *
+ * Parameters:
+ * name - {String}
+ */
+ timeEnd: function() {},
+
+ /**
+ * APIFunction: profile
+ * Turns on the JavaScript profiler. The optional argument title would
+ * contain the text to be printed in the header of the profile report.
+ *
+ * This function is not currently implemented in Firebug Lite.
+ *
+ * Parameters:
+ * title - {String} Optional title for the profiler
+ */
+ profile: function() {},
+
+ /**
+ * APIFunction: profileEnd
+ * Turns off the JavaScript profiler and prints its report.
+ *
+ * This function is not currently implemented in Firebug Lite.
+ */
+ profileEnd: function() {},
+
+ /**
+ * APIFunction: count
+ * Writes the number of times that the line of code where count was called
+ * was executed. The optional argument title will print a message in
+ * addition to the number of the count.
+ *
+ * This function is not currently implemented in Firebug Lite.
+ *
+ * Parameters:
+ * title - {String} Optional title to be printed with count
+ */
+ count: function() {},
+
+ CLASS_NAME: "OpenLayers.Console"
+};
+
+/**
+ * Execute an anonymous function to extend the OpenLayers.Console namespace
+ * if the firebug.js script is included. This closure is used so that the
+ * "scripts" and "i" variables don't pollute the global namespace.
+ */
+(function() {
+ /**
+ * If Firebug Lite is included (before this script), re-route all
+ * OpenLayers.Console calls to the console object.
+ */
+ var scripts = document.getElementsByTagName("script");
+ for(var i=0, len=scripts.length; i<len; ++i) {
+ if(scripts[i].src.indexOf("firebug.js") != -1) {
+ if(console) {
+ OpenLayers.Util.extend(OpenLayers.Console, console);
+ break;
+ }
+ }
+ }
+})();
+/* ======================================================================
+ OpenLayers/Lang.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes.js
+ * @requires OpenLayers/Console.js
+ */
+
+/**
+ * Namespace: OpenLayers.Lang
+ * Internationalization namespace. Contains dictionaries in various languages
+ * and methods to set and get the current language.
+ */
+OpenLayers.Lang = {
+
+ /**
+ * Property: code
+ * {String} Current language code to use in OpenLayers. Use the
+ * <setCode> method to set this value and the <getCode> method to
+ * retrieve it.
+ */
+ code: null,
+
+ /**
+ * APIProperty: defaultCode
+ * {String} Default language to use when a specific language can't be
+ * found. Default is "en".
+ */
+ defaultCode: "en",
+
+ /**
+ * APIFunction: getCode
+ * Get the current language code.
+ *
+ * Returns:
+ * {String} The current language code.
+ */
+ getCode: function() {
+ if(!OpenLayers.Lang.code) {
+ OpenLayers.Lang.setCode();
+ }
+ return OpenLayers.Lang.code;
+ },
+
+ /**
+ * APIFunction: setCode
+ * Set the language code for string translation. This code is used by
+ * the <OpenLayers.Lang.translate> method.
+ *
+ * Parameters:
+ * code - {String} These codes follow the IETF recommendations at
+ * http://www.ietf.org/rfc/rfc3066.txt. If no value is set, the
+ * browser's language setting will be tested. If no <OpenLayers.Lang>
+ * dictionary exists for the code, the <OpenLayers.String.defaultLang>
+ * will be used.
+ */
+ setCode: function(code) {
+ var lang;
+ if(!code) {
+ code = (OpenLayers.BROWSER_NAME == "msie") ?
+ navigator.userLanguage : navigator.language;
+ }
+ var parts = code.split('-');
+ parts[0] = parts[0].toLowerCase();
+ if(typeof OpenLayers.Lang[parts[0]] == "object") {
+ lang = parts[0];
+ }
+
+ // check for regional extensions
+ if(parts[1]) {
+ var testLang = parts[0] + '-' + parts[1].toUpperCase();
+ if(typeof OpenLayers.Lang[testLang] == "object") {
+ lang = testLang;
+ }
+ }
+ if(!lang) {
+ OpenLayers.Console.warn(
+ 'Failed to find OpenLayers.Lang.' + parts.join("-") +
+ ' dictionary, falling back to default language'
+ );
+ lang = OpenLayers.Lang.defaultCode;
+ }
+
+ OpenLayers.Lang.code = lang;
+ },
+
+ /**
+ * APIMethod: translate
+ * Looks up a key from a dictionary based on the current language string.
+ * The value of <getCode> will be used to determine the appropriate
+ * dictionary. Dictionaries are stored in <OpenLayers.Lang>.
+ *
+ * Parameters:
+ * key - {String} The key for an i18n string value in the dictionary.
+ * context - {Object} Optional context to be used with
+ * <OpenLayers.String.format>.
+ *
+ * Returns:
+ * {String} A internationalized string.
+ */
+ translate: function(key, context) {
+ var dictionary = OpenLayers.Lang[OpenLayers.Lang.getCode()];
+ var message = dictionary && dictionary[key];
+ if(!message) {
+ // Message not found, fall back to message key
+ message = key;
+ }
+ if(context) {
+ message = OpenLayers.String.format(message, context);
+ }
+ return message;
+ }
+
+};
+
+
+/**
+ * APIMethod: OpenLayers.i18n
+ * Alias for <OpenLayers.Lang.translate>. Looks up a key from a dictionary
+ * based on the current language string. The value of
+ * <OpenLayers.Lang.getCode> will be used to determine the appropriate
+ * dictionary. Dictionaries are stored in <OpenLayers.Lang>.
+ *
+ * Parameters:
+ * key - {String} The key for an i18n string value in the dictionary.
+ * context - {Object} Optional context to be used with
+ * <OpenLayers.String.format>.
+ *
+ * Returns:
+ * {String} A internationalized string.
+ */
+OpenLayers.i18n = OpenLayers.Lang.translate;
+/* ======================================================================
+ OpenLayers/Util.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes.js
+ * @requires OpenLayers/BaseTypes/Bounds.js
+ * @requires OpenLayers/BaseTypes/Element.js
+ * @requires OpenLayers/BaseTypes/LonLat.js
+ * @requires OpenLayers/BaseTypes/Pixel.js
+ * @requires OpenLayers/BaseTypes/Size.js
+ * @requires OpenLayers/Lang.js
+ */
+
+/**
+ * Namespace: Util
+ */
+OpenLayers.Util = OpenLayers.Util || {};
+
+/**
+ * Function: getElement
+ * This is the old $() from prototype
+ *
+ * Parameters:
+ * e - {String or DOMElement or Window}
+ *
+ * Returns:
+ * {Array(DOMElement) or DOMElement}
+ */
+OpenLayers.Util.getElement = function() {
+ var elements = [];
+
+ for (var i=0, len=arguments.length; i<len; i++) {
+ var element = arguments[i];
+ if (typeof element == 'string') {
+ element = document.getElementById(element);
+ }
+ if (arguments.length == 1) {
+ return element;
+ }
+ elements.push(element);
+ }
+ return elements;
+};
+
+/**
+ * Function: isElement
+ * A cross-browser implementation of "e instanceof Element".
+ *
+ * Parameters:
+ * o - {Object} The object to test.
+ *
+ * Returns:
+ * {Boolean}
+ */
+OpenLayers.Util.isElement = function(o) {
+ return !!(o && o.nodeType === 1);
+};
+
+/**
+ * Function: isArray
+ * Tests that the provided object is an array.
+ * This test handles the cross-IFRAME case not caught
+ * by "a instanceof Array" and should be used instead.
+ *
+ * Parameters:
+ * a - {Object} the object test.
+ *
+ * Returns:
+ * {Boolean} true if the object is an array.
+ */
+OpenLayers.Util.isArray = function(a) {
+ return (Object.prototype.toString.call(a) === '[object Array]');
+};
+
+/**
+ * Function: removeItem
+ * Remove an object from an array. Iterates through the array
+ * to find the item, then removes it.
+ *
+ * Parameters:
+ * array - {Array}
+ * item - {Object}
+ *
+ * Returns:
+ * {Array} A reference to the array
+ */
+OpenLayers.Util.removeItem = function(array, item) {
+ for(var i = array.length - 1; i >= 0; i--) {
+ if(array[i] == item) {
+ array.splice(i,1);
+ //break;more than once??
+ }
+ }
+ return array;
+};
+
+/**
+ * Function: indexOf
+ * Seems to exist already in FF, but not in MOZ.
+ *
+ * Parameters:
+ * array - {Array}
+ * obj - {*}
+ *
+ * Returns:
+ * {Integer} The index at which the first object was found in the array.
+ * If not found, returns -1.
+ */
+OpenLayers.Util.indexOf = function(array, obj) {
+ // use the build-in function if available.
+ if (typeof array.indexOf == "function") {
+ return array.indexOf(obj);
+ } else {
+ for (var i = 0, len = array.length; i < len; i++) {
+ if (array[i] == obj) {
+ return i;
+ }
+ }
+ return -1;
+ }
+};
+
+
+/**
+ * Property: dotless
+ * {RegExp}
+ * Compiled regular expression to match dots ("."). This is used for replacing
+ * dots in identifiers. Because object identifiers are frequently used for
+ * DOM element identifiers by the library, we avoid using dots to make for
+ * more sensible CSS selectors.
+ *
+ * TODO: Use a module pattern to avoid bloating the API with stuff like this.
+ */
+OpenLayers.Util.dotless = /\./g;
+
+/**
+ * Function: modifyDOMElement
+ *
+ * Modifies many properties of a DOM element all at once. Passing in
+ * null to an individual parameter will avoid setting the attribute.
+ *
+ * Parameters:
+ * element - {DOMElement} DOM element to modify.
+ * id - {String} The element id attribute to set. Note that dots (".") will be
+ * replaced with underscore ("_") in setting the element id.
+ * px - {<OpenLayers.Pixel>|Object} The element left and top position,
+ * OpenLayers.Pixel or an object with
+ * a 'x' and 'y' properties.
+ * sz - {<OpenLayers.Size>|Object} The element width and height,
+ * OpenLayers.Size or an object with a
+ * 'w' and 'h' properties.
+ * position - {String} The position attribute. eg: absolute,
+ * relative, etc.
+ * border - {String} The style.border attribute. eg:
+ * solid black 2px
+ * overflow - {String} The style.overview attribute.
+ * opacity - {Float} Fractional value (0.0 - 1.0)
+ */
+OpenLayers.Util.modifyDOMElement = function(element, id, px, sz, position,
+ border, overflow, opacity) {
+
+ if (id) {
+ element.id = id.replace(OpenLayers.Util.dotless, "_");
+ }
+ if (px) {
+ element.style.left = px.x + "px";
+ element.style.top = px.y + "px";
+ }
+ if (sz) {
+ element.style.width = sz.w + "px";
+ element.style.height = sz.h + "px";
+ }
+ if (position) {
+ element.style.position = position;
+ }
+ if (border) {
+ element.style.border = border;
+ }
+ if (overflow) {
+ element.style.overflow = overflow;
+ }
+ if (parseFloat(opacity) >= 0.0 && parseFloat(opacity) < 1.0) {
+ element.style.filter = 'alpha(opacity=' + (opacity * 100) + ')';
+ element.style.opacity = opacity;
+ } else if (parseFloat(opacity) == 1.0) {
+ element.style.filter = '';
+ element.style.opacity = '';
+ }
+};
+
+/**
+ * Function: createDiv
+ * Creates a new div and optionally set some standard attributes.
+ * Null may be passed to each parameter if you do not wish to
+ * set a particular attribute.
+ * Note - zIndex is NOT set on the resulting div.
+ *
+ * Parameters:
+ * id - {String} An identifier for this element. If no id is
+ * passed an identifier will be created
+ * automatically. Note that dots (".") will be replaced with
+ * underscore ("_") when generating ids.
+ * px - {<OpenLayers.Pixel>|Object} The element left and top position,
+ * OpenLayers.Pixel or an object with
+ * a 'x' and 'y' properties.
+ * sz - {<OpenLayers.Size>|Object} The element width and height,
+ * OpenLayers.Size or an object with a
+ * 'w' and 'h' properties.
+ * imgURL - {String} A url pointing to an image to use as a
+ * background image.
+ * position - {String} The style.position value. eg: absolute,
+ * relative etc.
+ * border - {String} The the style.border value.
+ * eg: 2px solid black
+ * overflow - {String} The style.overflow value. Eg. hidden
+ * opacity - {Float} Fractional value (0.0 - 1.0)
+ *
+ * Returns:
+ * {DOMElement} A DOM Div created with the specified attributes.
+ */
+OpenLayers.Util.createDiv = function(id, px, sz, imgURL, position,
+ border, overflow, opacity) {
+
+ var dom = document.createElement('div');
+
+ if (imgURL) {
+ dom.style.backgroundImage = 'url(' + imgURL + ')';
+ }
+
+ //set generic properties
+ if (!id) {
+ id = OpenLayers.Util.createUniqueID("OpenLayersDiv");
+ }
+ if (!position) {
+ position = "absolute";
+ }
+ OpenLayers.Util.modifyDOMElement(dom, id, px, sz, position,
+ border, overflow, opacity);
+
+ return dom;
+};
+
+/**
+ * Function: createImage
+ * Creates an img element with specific attribute values.
+ *
+ * Parameters:
+ * id - {String} The id field for the img. If none assigned one will be
+ * automatically generated.
+ * px - {<OpenLayers.Pixel>|Object} The element left and top position,
+ * OpenLayers.Pixel or an object with
+ * a 'x' and 'y' properties.
+ * sz - {<OpenLayers.Size>|Object} The element width and height,
+ * OpenLayers.Size or an object with a
+ * 'w' and 'h' properties.
+ * imgURL - {String} The url to use as the image source.
+ * position - {String} The style.position value.
+ * border - {String} The border to place around the image.
+ * opacity - {Float} Fractional value (0.0 - 1.0)
+ * delayDisplay - {Boolean} If true waits until the image has been
+ * loaded.
+ *
+ * Returns:
+ * {DOMElement} A DOM Image created with the specified attributes.
+ */
+OpenLayers.Util.createImage = function(id, px, sz, imgURL, position, border,
+ opacity, delayDisplay) {
+
+ var image = document.createElement("img");
+
+ //set generic properties
+ if (!id) {
+ id = OpenLayers.Util.createUniqueID("OpenLayersDiv");
+ }
+ if (!position) {
+ position = "relative";
+ }
+ OpenLayers.Util.modifyDOMElement(image, id, px, sz, position,
+ border, null, opacity);
+
+ if (delayDisplay) {
+ image.style.display = "none";
+ function display() {
+ image.style.display = "";
+ OpenLayers.Event.stopObservingElement(image);
+ }
+ OpenLayers.Event.observe(image, "load", display);
+ OpenLayers.Event.observe(image, "error", display);
+ }
+
+ //set special properties
+ image.style.alt = id;
+ image.galleryImg = "no";
+ if (imgURL) {
+ image.src = imgURL;
+ }
+
+ return image;
+};
+
+/**
+ * Property: IMAGE_RELOAD_ATTEMPTS
+ * {Integer} How many times should we try to reload an image before giving up?
+ * Default is 0
+ */
+OpenLayers.IMAGE_RELOAD_ATTEMPTS = 0;
+
+/**
+ * Property: alphaHackNeeded
+ * {Boolean} true if the png alpha hack is necessary and possible, false otherwise.
+ */
+OpenLayers.Util.alphaHackNeeded = null;
+
+/**
+ * Function: alphaHack
+ * Checks whether it's necessary (and possible) to use the png alpha
+ * hack which allows alpha transparency for png images under Internet
+ * Explorer.
+ *
+ * Returns:
+ * {Boolean} true if the png alpha hack is necessary and possible, false otherwise.
+ */
+OpenLayers.Util.alphaHack = function() {
+ if (OpenLayers.Util.alphaHackNeeded == null) {
+ var arVersion = navigator.appVersion.split("MSIE");
+ var version = parseFloat(arVersion[1]);
+ var filter = false;
+
+ // IEs4Lin dies when trying to access document.body.filters, because
+ // the property is there, but requires a DLL that can't be provided. This
+ // means that we need to wrap this in a try/catch so that this can
+ // continue.
+
+ try {
+ filter = !!(document.body.filters);
+ } catch (e) {}
+
+ OpenLayers.Util.alphaHackNeeded = (filter &&
+ (version >= 5.5) && (version < 7));
+ }
+ return OpenLayers.Util.alphaHackNeeded;
+};
+
+/**
+ * Function: modifyAlphaImageDiv
+ *
+ * Parameters:
+ * div - {DOMElement} Div containing Alpha-adjusted Image
+ * id - {String}
+ * px - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or an object with
+ * a 'x' and 'y' properties.
+ * sz - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with
+ * a 'w' and 'h' properties.
+ * imgURL - {String}
+ * position - {String}
+ * border - {String}
+ * sizing - {String} 'crop', 'scale', or 'image'. Default is "scale"
+ * opacity - {Float} Fractional value (0.0 - 1.0)
+ */
+OpenLayers.Util.modifyAlphaImageDiv = function(div, id, px, sz, imgURL,
+ position, border, sizing,
+ opacity) {
+
+ OpenLayers.Util.modifyDOMElement(div, id, px, sz, position,
+ null, null, opacity);
+
+ var img = div.childNodes[0];
+
+ if (imgURL) {
+ img.src = imgURL;
+ }
+ OpenLayers.Util.modifyDOMElement(img, div.id + "_innerImage", null, sz,
+ "relative", border);
+
+ if (OpenLayers.Util.alphaHack()) {
+ if(div.style.display != "none") {
+ div.style.display = "inline-block";
+ }
+ if (sizing == null) {
+ sizing = "scale";
+ }
+
+ div.style.filter = "progid:DXImageTransform.Microsoft" +
+ ".AlphaImageLoader(src='" + img.src + "', " +
+ "sizingMethod='" + sizing + "')";
+ if (parseFloat(div.style.opacity) >= 0.0 &&
+ parseFloat(div.style.opacity) < 1.0) {
+ div.style.filter += " alpha(opacity=" + div.style.opacity * 100 + ")";
+ }
+
+ img.style.filter = "alpha(opacity=0)";
+ }
+};
+
+/**
+ * Function: createAlphaImageDiv
+ *
+ * Parameters:
+ * id - {String}
+ * px - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or an object with
+ * a 'x' and 'y' properties.
+ * sz - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with
+ * a 'w' and 'h' properties.
+ * imgURL - {String}
+ * position - {String}
+ * border - {String}
+ * sizing - {String} 'crop', 'scale', or 'image'. Default is "scale"
+ * opacity - {Float} Fractional value (0.0 - 1.0)
+ * delayDisplay - {Boolean} If true waits until the image has been
+ * loaded.
+ *
+ * Returns:
+ * {DOMElement} A DOM Div created with a DOM Image inside it. If the hack is
+ * needed for transparency in IE, it is added.
+ */
+OpenLayers.Util.createAlphaImageDiv = function(id, px, sz, imgURL,
+ position, border, sizing,
+ opacity, delayDisplay) {
+
+ var div = OpenLayers.Util.createDiv();
+ var img = OpenLayers.Util.createImage(null, null, null, null, null, null,
+ null, delayDisplay);
+ img.className = "olAlphaImg";
+ div.appendChild(img);
+
+ OpenLayers.Util.modifyAlphaImageDiv(div, id, px, sz, imgURL, position,
+ border, sizing, opacity);
+
+ return div;
+};
+
+
+/**
+ * Function: upperCaseObject
+ * Creates a new hashtable and copies over all the keys from the
+ * passed-in object, but storing them under an uppercased
+ * version of the key at which they were stored.
+ *
+ * Parameters:
+ * object - {Object}
+ *
+ * Returns:
+ * {Object} A new Object with all the same keys but uppercased
+ */
+OpenLayers.Util.upperCaseObject = function (object) {
+ var uObject = {};
+ for (var key in object) {
+ uObject[key.toUpperCase()] = object[key];
+ }
+ return uObject;
+};
+
+/**
+ * Function: applyDefaults
+ * Takes an object and copies any properties that don't exist from
+ * another properties, by analogy with OpenLayers.Util.extend() from
+ * Prototype.js.
+ *
+ * Parameters:
+ * to - {Object} The destination object.
+ * from - {Object} The source object. Any properties of this object that
+ * are undefined in the to object will be set on the to object.
+ *
+ * Returns:
+ * {Object} A reference to the to object. Note that the to argument is modified
+ * in place and returned by this function.
+ */
+OpenLayers.Util.applyDefaults = function (to, from) {
+ to = to || {};
+ /*
+ * FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative
+ * prototype object" when calling hawOwnProperty if the source object is an
+ * instance of window.Event.
+ */
+ var fromIsEvt = typeof window.Event == "function"
+ && from instanceof window.Event;
+
+ for (var key in from) {
+ if (to[key] === undefined ||
+ (!fromIsEvt && from.hasOwnProperty
+ && from.hasOwnProperty(key) && !to.hasOwnProperty(key))) {
+ to[key] = from[key];
+ }
+ }
+ /**
+ * IE doesn't include the toString property when iterating over an object's
+ * properties with the for(property in object) syntax. Explicitly check if
+ * the source has its own toString property.
+ */
+ if(!fromIsEvt && from && from.hasOwnProperty
+ && from.hasOwnProperty('toString') && !to.hasOwnProperty('toString')) {
+ to.toString = from.toString;
+ }
+
+ return to;
+};
+
+/**
+ * Function: getParameterString
+ *
+ * Parameters:
+ * params - {Object}
+ *
+ * Returns:
+ * {String} A concatenation of the properties of an object in
+ * http parameter notation.
+ * (ex. <i>"key1=value1&key2=value2&key3=value3"</i>)
+ * If a parameter is actually a list, that parameter will then
+ * be set to a comma-seperated list of values (foo,bar) instead
+ * of being URL escaped (foo%3Abar).
+ */
+OpenLayers.Util.getParameterString = function(params) {
+ var paramsArray = [];
+
+ for (var key in params) {
+ var value = params[key];
+ if ((value != null) && (typeof value != 'function')) {
+ var encodedValue;
+ if (typeof value == 'object' && value.constructor == Array) {
+ /* value is an array; encode items and separate with "," */
+ var encodedItemArray = [];
+ var item;
+ for (var itemIndex=0, len=value.length; itemIndex<len; itemIndex++) {
+ item = value[itemIndex];
+ encodedItemArray.push(encodeURIComponent(
+ (item === null || item === undefined) ? "" : item)
+ );
+ }
+ encodedValue = encodedItemArray.join(",");
+ }
+ else {
+ /* value is a string; simply encode */
+ encodedValue = encodeURIComponent(value);
+ }
+ paramsArray.push(encodeURIComponent(key) + "=" + encodedValue);
+ }
+ }
+
+ return paramsArray.join("&");
+};
+
+/**
+ * Function: urlAppend
+ * Appends a parameter string to a url. This function includes the logic for
+ * using the appropriate character (none, & or ?) to append to the url before
+ * appending the param string.
+ *
+ * Parameters:
+ * url - {String} The url to append to
+ * paramStr - {String} The param string to append
+ *
+ * Returns:
+ * {String} The new url
+ */
+OpenLayers.Util.urlAppend = function(url, paramStr) {
+ var newUrl = url;
+ if(paramStr) {
+ var parts = (url + " ").split(/[?&]/);
+ newUrl += (parts.pop() === " " ?
+ paramStr :
+ parts.length ? "&" + paramStr : "?" + paramStr);
+ }
+ return newUrl;
+};
+
+/**
+ * Function: getImagesLocation
+ *
+ * Returns:
+ * {String} The fully formatted image location string
+ */
+OpenLayers.Util.getImagesLocation = function() {
+ return OpenLayers.ImgPath || (OpenLayers._getScriptLocation() + "img/");
+};
+
+/**
+ * Function: getImageLocation
+ *
+ * Returns:
+ * {String} The fully formatted location string for a specified image
+ */
+OpenLayers.Util.getImageLocation = function(image) {
+ return OpenLayers.Util.getImagesLocation() + image;
+};
+
+
+/**
+ * Function: Try
+ * Execute functions until one of them doesn't throw an error.
+ * Capitalized because "try" is a reserved word in JavaScript.
+ * Taken directly from OpenLayers.Util.Try()
+ *
+ * Parameters:
+ * [*] - {Function} Any number of parameters may be passed to Try()
+ * It will attempt to execute each of them until one of them
+ * successfully executes.
+ * If none executes successfully, returns null.
+ *
+ * Returns:
+ * {*} The value returned by the first successfully executed function.
+ */
+OpenLayers.Util.Try = function() {
+ var returnValue = null;
+
+ for (var i=0, len=arguments.length; i<len; i++) {
+ var lambda = arguments[i];
+ try {
+ returnValue = lambda();
+ break;
+ } catch (e) {}
+ }
+
+ return returnValue;
+};
+
+/**
+ * Function: getXmlNodeValue
+ *
+ * Parameters:
+ * node - {XMLNode}
+ *
+ * Returns:
+ * {String} The text value of the given node, without breaking in firefox or IE
+ */
+OpenLayers.Util.getXmlNodeValue = function(node) {
+ var val = null;
+ OpenLayers.Util.Try(
+ function() {
+ val = node.text;
+ if (!val) {
+ val = node.textContent;
+ }
+ if (!val) {
+ val = node.firstChild.nodeValue;
+ }
+ },
+ function() {
+ val = node.textContent;
+ });
+ return val;
+};
+
+/**
+ * Function: mouseLeft
+ *
+ * Parameters:
+ * evt - {Event}
+ * div - {HTMLDivElement}
+ *
+ * Returns:
+ * {Boolean}
+ */
+OpenLayers.Util.mouseLeft = function (evt, div) {
+ // start with the element to which the mouse has moved
+ var target = (evt.relatedTarget) ? evt.relatedTarget : evt.toElement;
+ // walk up the DOM tree.
+ while (target != div && target != null) {
+ target = target.parentNode;
+ }
+ // if the target we stop at isn't the div, then we've left the div.
+ return (target != div);
+};
+
+/**
+ * Property: precision
+ * {Number} The number of significant digits to retain to avoid
+ * floating point precision errors.
+ *
+ * We use 14 as a "safe" default because, although IEEE 754 double floats
+ * (standard on most modern operating systems) support up to about 16
+ * significant digits, 14 significant digits are sufficient to represent
+ * sub-millimeter accuracy in any coordinate system that anyone is likely to
+ * use with OpenLayers.
+ *
+ * If DEFAULT_PRECISION is set to 0, the original non-truncating behavior
+ * of OpenLayers <2.8 is preserved. Be aware that this will cause problems
+ * with certain projections, e.g. spherical Mercator.
+ *
+ */
+OpenLayers.Util.DEFAULT_PRECISION = 14;
+
+/**
+ * Function: toFloat
+ * Convenience method to cast an object to a Number, rounded to the
+ * desired floating point precision.
+ *
+ * Parameters:
+ * number - {Number} The number to cast and round.
+ * precision - {Number} An integer suitable for use with
+ * Number.toPrecision(). Defaults to OpenLayers.Util.DEFAULT_PRECISION.
+ * If set to 0, no rounding is performed.
+ *
+ * Returns:
+ * {Number} The cast, rounded number.
+ */
+OpenLayers.Util.toFloat = function (number, precision) {
+ if (precision == null) {
+ precision = OpenLayers.Util.DEFAULT_PRECISION;
+ }
+ if (typeof number !== "number") {
+ number = parseFloat(number);
+ }
+ return precision === 0 ? number :
+ parseFloat(number.toPrecision(precision));
+};
+
+/**
+ * Function: rad
+ *
+ * Parameters:
+ * x - {Float}
+ *
+ * Returns:
+ * {Float}
+ */
+OpenLayers.Util.rad = function(x) {return x*Math.PI/180;};
+
+/**
+ * Function: deg
+ *
+ * Parameters:
+ * x - {Float}
+ *
+ * Returns:
+ * {Float}
+ */
+OpenLayers.Util.deg = function(x) {return x*180/Math.PI;};
+
+/**
+ * Property: VincentyConstants
+ * {Object} Constants for Vincenty functions.
+ */
+OpenLayers.Util.VincentyConstants = {
+ a: 6378137,
+ b: 6356752.3142,
+ f: 1/298.257223563
+};
+
+/**
+ * APIFunction: distVincenty
+ * Given two objects representing points with geographic coordinates, this
+ * calculates the distance between those points on the surface of an
+ * ellipsoid.
+ *
+ * Parameters:
+ * p1 - {<OpenLayers.LonLat>} (or any object with both .lat, .lon properties)
+ * p2 - {<OpenLayers.LonLat>} (or any object with both .lat, .lon properties)
+ *
+ * Returns:
+ * {Float} The distance (in km) between the two input points as measured on an
+ * ellipsoid. Note that the input point objects must be in geographic
+ * coordinates (decimal degrees) and the return distance is in kilometers.
+ */
+OpenLayers.Util.distVincenty = function(p1, p2) {
+ var ct = OpenLayers.Util.VincentyConstants;
+ var a = ct.a, b = ct.b, f = ct.f;
+
+ var L = OpenLayers.Util.rad(p2.lon - p1.lon);
+ var U1 = Math.atan((1-f) * Math.tan(OpenLayers.Util.rad(p1.lat)));
+ var U2 = Math.atan((1-f) * Math.tan(OpenLayers.Util.rad(p2.lat)));
+ var sinU1 = Math.sin(U1), cosU1 = Math.cos(U1);
+ var sinU2 = Math.sin(U2), cosU2 = Math.cos(U2);
+ var lambda = L, lambdaP = 2*Math.PI;
+ var iterLimit = 20;
+ while (Math.abs(lambda-lambdaP) > 1e-12 && --iterLimit>0) {
+ var sinLambda = Math.sin(lambda), cosLambda = Math.cos(lambda);
+ var sinSigma = Math.sqrt((cosU2*sinLambda) * (cosU2*sinLambda) +
+ (cosU1*sinU2-sinU1*cosU2*cosLambda) * (cosU1*sinU2-sinU1*cosU2*cosLambda));
+ if (sinSigma==0) {
+ return 0; // co-incident points
+ }
+ var cosSigma = sinU1*sinU2 + cosU1*cosU2*cosLambda;
+ var sigma = Math.atan2(sinSigma, cosSigma);
+ var alpha = Math.asin(cosU1 * cosU2 * sinLambda / sinSigma);
+ var cosSqAlpha = Math.cos(alpha) * Math.cos(alpha);
+ var cos2SigmaM = cosSigma - 2*sinU1*sinU2/cosSqAlpha;
+ var C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha));
+ lambdaP = lambda;
+ lambda = L + (1-C) * f * Math.sin(alpha) *
+ (sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)));
+ }
+ if (iterLimit==0) {
+ return NaN; // formula failed to converge
+ }
+ var uSq = cosSqAlpha * (a*a - b*b) / (b*b);
+ var A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq)));
+ var B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq)));
+ var deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)-
+ B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM)));
+ var s = b*A*(sigma-deltaSigma);
+ var d = s.toFixed(3)/1000; // round to 1mm precision
+ return d;
+};
+
+/**
+ * APIFunction: destinationVincenty
+ * Calculate destination point given start point lat/long (numeric degrees),
+ * bearing (numeric degrees) & distance (in m).
+ * Adapted from Chris Veness work, see
+ * http://www.movable-type.co.uk/scripts/latlong-vincenty-direct.html
+ *
+ * Parameters:
+ * lonlat - {<OpenLayers.LonLat>} (or any object with both .lat, .lon
+ * properties) The start point.
+ * brng - {Float} The bearing (degrees).
+ * dist - {Float} The ground distance (meters).
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>} The destination point.
+ */
+OpenLayers.Util.destinationVincenty = function(lonlat, brng, dist) {
+ var u = OpenLayers.Util;
+ var ct = u.VincentyConstants;
+ var a = ct.a, b = ct.b, f = ct.f;
+
+ var lon1 = lonlat.lon;
+ var lat1 = lonlat.lat;
+
+ var s = dist;
+ var alpha1 = u.rad(brng);
+ var sinAlpha1 = Math.sin(alpha1);
+ var cosAlpha1 = Math.cos(alpha1);
+
+ var tanU1 = (1-f) * Math.tan(u.rad(lat1));
+ var cosU1 = 1 / Math.sqrt((1 + tanU1*tanU1)), sinU1 = tanU1*cosU1;
+ var sigma1 = Math.atan2(tanU1, cosAlpha1);
+ var sinAlpha = cosU1 * sinAlpha1;
+ var cosSqAlpha = 1 - sinAlpha*sinAlpha;
+ var uSq = cosSqAlpha * (a*a - b*b) / (b*b);
+ var A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq)));
+ var B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq)));
+
+ var sigma = s / (b*A), sigmaP = 2*Math.PI;
+ while (Math.abs(sigma-sigmaP) > 1e-12) {
+ var cos2SigmaM = Math.cos(2*sigma1 + sigma);
+ var sinSigma = Math.sin(sigma);
+ var cosSigma = Math.cos(sigma);
+ var deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)-
+ B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM)));
+ sigmaP = sigma;
+ sigma = s / (b*A) + deltaSigma;
+ }
+
+ var tmp = sinU1*sinSigma - cosU1*cosSigma*cosAlpha1;
+ var lat2 = Math.atan2(sinU1*cosSigma + cosU1*sinSigma*cosAlpha1,
+ (1-f)*Math.sqrt(sinAlpha*sinAlpha + tmp*tmp));
+ var lambda = Math.atan2(sinSigma*sinAlpha1, cosU1*cosSigma - sinU1*sinSigma*cosAlpha1);
+ var C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha));
+ var L = lambda - (1-C) * f * sinAlpha *
+ (sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)));
+
+ var revAz = Math.atan2(sinAlpha, -tmp); // final bearing
+
+ return new OpenLayers.LonLat(lon1+u.deg(L), u.deg(lat2));
+};
+
+/**
+ * Function: getParameters
+ * Parse the parameters from a URL or from the current page itself into a
+ * JavaScript Object. Note that parameter values with commas are separated
+ * out into an Array.
+ *
+ * Parameters:
+ * url - {String} Optional url used to extract the query string.
+ * If url is null or is not supplied, query string is taken
+ * from the page location.
+ * options - {Object} Additional options. Optional.
+ *
+ * Valid options:
+ * splitArgs - {Boolean} Split comma delimited params into arrays? Default is
+ * true.
+ *
+ * Returns:
+ * {Object} An object of key/value pairs from the query string.
+ */
+OpenLayers.Util.getParameters = function(url, options) {
+ options = options || {};
+ // if no url specified, take it from the location bar
+ url = (url === null || url === undefined) ? window.location.href : url;
+
+ //parse out parameters portion of url string
+ var paramsString = "";
+ if (OpenLayers.String.contains(url, '?')) {
+ var start = url.indexOf('?') + 1;
+ var end = OpenLayers.String.contains(url, "#") ?
+ url.indexOf('#') : url.length;
+ paramsString = url.substring(start, end);
+ }
+
+ var parameters = {};
+ var pairs = paramsString.split(/[&;]/);
+ for(var i=0, len=pairs.length; i<len; ++i) {
+ var keyValue = pairs[i].split('=');
+ if (keyValue[0]) {
+
+ var key = keyValue[0];
+ try {
+ key = decodeURIComponent(key);
+ } catch (err) {
+ key = unescape(key);
+ }
+
+ // being liberal by replacing "+" with " "
+ var value = (keyValue[1] || '').replace(/\+/g, " ");
+
+ try {
+ value = decodeURIComponent(value);
+ } catch (err) {
+ value = unescape(value);
+ }
+
+ // follow OGC convention of comma delimited values
+ if (options.splitArgs !== false) {
+ value = value.split(",");
+ }
+
+ //if there's only one value, do not return as array
+ if (value.length == 1) {
+ value = value[0];
+ }
+
+ parameters[key] = value;
+ }
+ }
+ return parameters;
+};
+
+/**
+ * Property: lastSeqID
+ * {Integer} The ever-incrementing count variable.
+ * Used for generating unique ids.
+ */
+OpenLayers.Util.lastSeqID = 0;
+
+/**
+ * Function: createUniqueID
+ * Create a unique identifier for this session. Each time this function
+ * is called, a counter is incremented. The return will be the optional
+ * prefix (defaults to "id_") appended with the counter value.
+ *
+ * Parameters:
+ * prefix - {String} Optional string to prefix unique id. Default is "id_".
+ * Note that dots (".") in the prefix will be replaced with underscore ("_").
+ *
+ * Returns:
+ * {String} A unique id string, built on the passed in prefix.
+ */
+OpenLayers.Util.createUniqueID = function(prefix) {
+ if (prefix == null) {
+ prefix = "id_";
+ } else {
+ prefix = prefix.replace(OpenLayers.Util.dotless, "_");
+ }
+ OpenLayers.Util.lastSeqID += 1;
+ return prefix + OpenLayers.Util.lastSeqID;
+};
+
+/**
+ * Constant: INCHES_PER_UNIT
+ * {Object} Constant inches per unit -- borrowed from MapServer mapscale.c
+ * derivation of nautical miles from http://en.wikipedia.org/wiki/Nautical_mile
+ * Includes the full set of units supported by CS-MAP (http://trac.osgeo.org/csmap/)
+ * and PROJ.4 (http://trac.osgeo.org/proj/)
+ * The hardcoded table is maintain in a CS-MAP source code module named CSdataU.c
+ * The hardcoded table of PROJ.4 units are in pj_units.c.
+ */
+OpenLayers.INCHES_PER_UNIT = {
+ 'inches': 1.0,
+ 'ft': 12.0,
+ 'mi': 63360.0,
+ 'm': 39.37,
+ 'km': 39370,
+ 'dd': 4374754,
+ 'yd': 36
+};
+OpenLayers.INCHES_PER_UNIT["in"]= OpenLayers.INCHES_PER_UNIT.inches;
+OpenLayers.INCHES_PER_UNIT["degrees"] = OpenLayers.INCHES_PER_UNIT.dd;
+OpenLayers.INCHES_PER_UNIT["nmi"] = 1852 * OpenLayers.INCHES_PER_UNIT.m;
+
+// Units from CS-Map
+OpenLayers.METERS_PER_INCH = 0.02540005080010160020;
+OpenLayers.Util.extend(OpenLayers.INCHES_PER_UNIT, {
+ "Inch": OpenLayers.INCHES_PER_UNIT.inches,
+ "Meter": 1.0 / OpenLayers.METERS_PER_INCH, //EPSG:9001
+ "Foot": 0.30480060960121920243 / OpenLayers.METERS_PER_INCH, //EPSG:9003
+ "IFoot": 0.30480000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9002
+ "ClarkeFoot": 0.3047972651151 / OpenLayers.METERS_PER_INCH, //EPSG:9005
+ "SearsFoot": 0.30479947153867624624 / OpenLayers.METERS_PER_INCH, //EPSG:9041
+ "GoldCoastFoot": 0.30479971018150881758 / OpenLayers.METERS_PER_INCH, //EPSG:9094
+ "IInch": 0.02540000000000000000 / OpenLayers.METERS_PER_INCH,
+ "MicroInch": 0.00002540000000000000 / OpenLayers.METERS_PER_INCH,
+ "Mil": 0.00000002540000000000 / OpenLayers.METERS_PER_INCH,
+ "Centimeter": 0.01000000000000000000 / OpenLayers.METERS_PER_INCH,
+ "Kilometer": 1000.00000000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9036
+ "Yard": 0.91440182880365760731 / OpenLayers.METERS_PER_INCH,
+ "SearsYard": 0.914398414616029 / OpenLayers.METERS_PER_INCH, //EPSG:9040
+ "IndianYard": 0.91439853074444079983 / OpenLayers.METERS_PER_INCH, //EPSG:9084
+ "IndianYd37": 0.91439523 / OpenLayers.METERS_PER_INCH, //EPSG:9085
+ "IndianYd62": 0.9143988 / OpenLayers.METERS_PER_INCH, //EPSG:9086
+ "IndianYd75": 0.9143985 / OpenLayers.METERS_PER_INCH, //EPSG:9087
+ "IndianFoot": 0.30479951 / OpenLayers.METERS_PER_INCH, //EPSG:9080
+ "IndianFt37": 0.30479841 / OpenLayers.METERS_PER_INCH, //EPSG:9081
+ "IndianFt62": 0.3047996 / OpenLayers.METERS_PER_INCH, //EPSG:9082
+ "IndianFt75": 0.3047995 / OpenLayers.METERS_PER_INCH, //EPSG:9083
+ "Mile": 1609.34721869443738887477 / OpenLayers.METERS_PER_INCH,
+ "IYard": 0.91440000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9096
+ "IMile": 1609.34400000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9093
+ "NautM": 1852.00000000000000000000 / OpenLayers.METERS_PER_INCH, //EPSG:9030
+ "Lat-66": 110943.316488932731 / OpenLayers.METERS_PER_INCH,
+ "Lat-83": 110946.25736872234125 / OpenLayers.METERS_PER_INCH,
+ "Decimeter": 0.10000000000000000000 / OpenLayers.METERS_PER_INCH,
+ "Millimeter": 0.00100000000000000000 / OpenLayers.METERS_PER_INCH,
+ "Dekameter": 10.00000000000000000000 / OpenLayers.METERS_PER_INCH,
+ "Decameter": 10.00000000000000000000 / OpenLayers.METERS_PER_INCH,
+ "Hectometer": 100.00000000000000000000 / OpenLayers.METERS_PER_INCH,
+ "GermanMeter": 1.0000135965 / OpenLayers.METERS_PER_INCH, //EPSG:9031
+ "CaGrid": 0.999738 / OpenLayers.METERS_PER_INCH,
+ "ClarkeChain": 20.1166194976 / OpenLayers.METERS_PER_INCH, //EPSG:9038
+ "GunterChain": 20.11684023368047 / OpenLayers.METERS_PER_INCH, //EPSG:9033
+ "BenoitChain": 20.116782494375872 / OpenLayers.METERS_PER_INCH, //EPSG:9062
+ "SearsChain": 20.11676512155 / OpenLayers.METERS_PER_INCH, //EPSG:9042
+ "ClarkeLink": 0.201166194976 / OpenLayers.METERS_PER_INCH, //EPSG:9039
+ "GunterLink": 0.2011684023368047 / OpenLayers.METERS_PER_INCH, //EPSG:9034
+ "BenoitLink": 0.20116782494375872 / OpenLayers.METERS_PER_INCH, //EPSG:9063
+ "SearsLink": 0.2011676512155 / OpenLayers.METERS_PER_INCH, //EPSG:9043
+ "Rod": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
+ "IntnlChain": 20.1168 / OpenLayers.METERS_PER_INCH, //EPSG:9097
+ "IntnlLink": 0.201168 / OpenLayers.METERS_PER_INCH, //EPSG:9098
+ "Perch": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
+ "Pole": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
+ "Furlong": 201.1684023368046 / OpenLayers.METERS_PER_INCH,
+ "Rood": 3.778266898 / OpenLayers.METERS_PER_INCH,
+ "CapeFoot": 0.3047972615 / OpenLayers.METERS_PER_INCH,
+ "Brealey": 375.00000000000000000000 / OpenLayers.METERS_PER_INCH,
+ "ModAmFt": 0.304812252984505969011938 / OpenLayers.METERS_PER_INCH,
+ "Fathom": 1.8288 / OpenLayers.METERS_PER_INCH,
+ "NautM-UK": 1853.184 / OpenLayers.METERS_PER_INCH,
+ "50kilometers": 50000.0 / OpenLayers.METERS_PER_INCH,
+ "150kilometers": 150000.0 / OpenLayers.METERS_PER_INCH
+});
+
+//unit abbreviations supported by PROJ.4
+OpenLayers.Util.extend(OpenLayers.INCHES_PER_UNIT, {
+ "mm": OpenLayers.INCHES_PER_UNIT["Meter"] / 1000.0,
+ "cm": OpenLayers.INCHES_PER_UNIT["Meter"] / 100.0,
+ "dm": OpenLayers.INCHES_PER_UNIT["Meter"] * 100.0,
+ "km": OpenLayers.INCHES_PER_UNIT["Meter"] * 1000.0,
+ "kmi": OpenLayers.INCHES_PER_UNIT["nmi"], //International Nautical Mile
+ "fath": OpenLayers.INCHES_PER_UNIT["Fathom"], //International Fathom
+ "ch": OpenLayers.INCHES_PER_UNIT["IntnlChain"], //International Chain
+ "link": OpenLayers.INCHES_PER_UNIT["IntnlLink"], //International Link
+ "us-in": OpenLayers.INCHES_PER_UNIT["inches"], //U.S. Surveyor's Inch
+ "us-ft": OpenLayers.INCHES_PER_UNIT["Foot"], //U.S. Surveyor's Foot
+ "us-yd": OpenLayers.INCHES_PER_UNIT["Yard"], //U.S. Surveyor's Yard
+ "us-ch": OpenLayers.INCHES_PER_UNIT["GunterChain"], //U.S. Surveyor's Chain
+ "us-mi": OpenLayers.INCHES_PER_UNIT["Mile"], //U.S. Surveyor's Statute Mile
+ "ind-yd": OpenLayers.INCHES_PER_UNIT["IndianYd37"], //Indian Yard
+ "ind-ft": OpenLayers.INCHES_PER_UNIT["IndianFt37"], //Indian Foot
+ "ind-ch": 20.11669506 / OpenLayers.METERS_PER_INCH //Indian Chain
+});
+
+/**
+ * Constant: DOTS_PER_INCH
+ * {Integer} 72 (A sensible default)
+ */
+OpenLayers.DOTS_PER_INCH = 72;
+
+/**
+ * Function: normalizeScale
+ *
+ * Parameters:
+ * scale - {float}
+ *
+ * Returns:
+ * {Float} A normalized scale value, in 1 / X format.
+ * This means that if a value less than one ( already 1/x) is passed
+ * in, it just returns scale directly. Otherwise, it returns
+ * 1 / scale
+ */
+OpenLayers.Util.normalizeScale = function (scale) {
+ var normScale = (scale > 1.0) ? (1.0 / scale)
+ : scale;
+ return normScale;
+};
+
+/**
+ * Function: getResolutionFromScale
+ *
+ * Parameters:
+ * scale - {Float}
+ * units - {String} Index into OpenLayers.INCHES_PER_UNIT hashtable.
+ * Default is degrees
+ *
+ * Returns:
+ * {Float} The corresponding resolution given passed-in scale and unit
+ * parameters. If the given scale is falsey, the returned resolution will
+ * be undefined.
+ */
+OpenLayers.Util.getResolutionFromScale = function (scale, units) {
+ var resolution;
+ if (scale) {
+ if (units == null) {
+ units = "degrees";
+ }
+ var normScale = OpenLayers.Util.normalizeScale(scale);
+ resolution = 1 / (normScale * OpenLayers.INCHES_PER_UNIT[units]
+ * OpenLayers.DOTS_PER_INCH);
+ }
+ return resolution;
+};
+
+/**
+ * Function: getScaleFromResolution
+ *
+ * Parameters:
+ * resolution - {Float}
+ * units - {String} Index into OpenLayers.INCHES_PER_UNIT hashtable.
+ * Default is degrees
+ *
+ * Returns:
+ * {Float} The corresponding scale given passed-in resolution and unit
+ * parameters.
+ */
+OpenLayers.Util.getScaleFromResolution = function (resolution, units) {
+
+ if (units == null) {
+ units = "degrees";
+ }
+
+ var scale = resolution * OpenLayers.INCHES_PER_UNIT[units] *
+ OpenLayers.DOTS_PER_INCH;
+ return scale;
+};
+
+/**
+ * Function: pagePosition
+ * Calculates the position of an element on the page (see
+ * http://code.google.com/p/doctype/wiki/ArticlePageOffset)
+ *
+ * OpenLayers.Util.pagePosition is based on Yahoo's getXY method, which is
+ * Copyright (c) 2006, Yahoo! Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms, with or
+ * without modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * * Neither the name of Yahoo! Inc. nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission of Yahoo! Inc.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Parameters:
+ * forElement - {DOMElement}
+ *
+ * Returns:
+ * {Array} two item array, Left value then Top value.
+ */
+OpenLayers.Util.pagePosition = function(forElement) {
+ // NOTE: If element is hidden (display none or disconnected or any the
+ // ancestors are hidden) we get (0,0) by default but we still do the
+ // accumulation of scroll position.
+
+ var pos = [0, 0];
+ var viewportElement = OpenLayers.Util.getViewportElement();
+ if (!forElement || forElement == window || forElement == viewportElement) {
+ // viewport is always at 0,0 as that defined the coordinate system for
+ // this function - this avoids special case checks in the code below
+ return pos;
+ }
+
+ // Gecko browsers normally use getBoxObjectFor to calculate the position.
+ // When invoked for an element with an implicit absolute position though it
+ // can be off by one. Therefore the recursive implementation is used in
+ // those (relatively rare) cases.
+ var BUGGY_GECKO_BOX_OBJECT =
+ OpenLayers.IS_GECKO && document.getBoxObjectFor &&
+ OpenLayers.Element.getStyle(forElement, 'position') == 'absolute' &&
+ (forElement.style.top == '' || forElement.style.left == '');
+
+ var parent = null;
+ var box;
+
+ if (forElement.getBoundingClientRect) { // IE
+ box = forElement.getBoundingClientRect();
+ var scrollTop = window.pageYOffset || viewportElement.scrollTop;
+ var scrollLeft = window.pageXOffset || viewportElement.scrollLeft;
+
+ pos[0] = box.left + scrollLeft;
+ pos[1] = box.top + scrollTop;
+
+ } else if (document.getBoxObjectFor && !BUGGY_GECKO_BOX_OBJECT) { // gecko
+ // Gecko ignores the scroll values for ancestors, up to 1.9. See:
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=328881 and
+ // https://bugzilla.mozilla.org/show_bug.cgi?id=330619
+
+ box = document.getBoxObjectFor(forElement);
+ var vpBox = document.getBoxObjectFor(viewportElement);
+ pos[0] = box.screenX - vpBox.screenX;
+ pos[1] = box.screenY - vpBox.screenY;
+
+ } else { // safari/opera
+ pos[0] = forElement.offsetLeft;
+ pos[1] = forElement.offsetTop;
+ parent = forElement.offsetParent;
+ if (parent != forElement) {
+ while (parent) {
+ pos[0] += parent.offsetLeft;
+ pos[1] += parent.offsetTop;
+ parent = parent.offsetParent;
+ }
+ }
+
+ var browser = OpenLayers.BROWSER_NAME;
+
+ // opera & (safari absolute) incorrectly account for body offsetTop
+ if (browser == "opera" || (browser == "safari" &&
+ OpenLayers.Element.getStyle(forElement, 'position') == 'absolute')) {
+ pos[1] -= document.body.offsetTop;
+ }
+
+ // accumulate the scroll positions for everything but the body element
+ parent = forElement.offsetParent;
+ while (parent && parent != document.body) {
+ pos[0] -= parent.scrollLeft;
+ // see https://bugs.opera.com/show_bug.cgi?id=249965
+ if (browser != "opera" || parent.tagName != 'TR') {
+ pos[1] -= parent.scrollTop;
+ }
+ parent = parent.offsetParent;
+ }
+ }
+
+ return pos;
+};
+
+/**
+ * Function: getViewportElement
+ * Returns die viewport element of the document. The viewport element is
+ * usually document.documentElement, except in IE,where it is either
+ * document.body or document.documentElement, depending on the document's
+ * compatibility mode (see
+ * http://code.google.com/p/doctype/wiki/ArticleClientViewportElement)
+ *
+ * Returns:
+ * {DOMElement}
+ */
+OpenLayers.Util.getViewportElement = function() {
+ var viewportElement = arguments.callee.viewportElement;
+ if (viewportElement == undefined) {
+ viewportElement = (OpenLayers.BROWSER_NAME == "msie" &&
+ document.compatMode != 'CSS1Compat') ? document.body :
+ document.documentElement;
+ arguments.callee.viewportElement = viewportElement;
+ }
+ return viewportElement;
+};
+
+/**
+ * Function: isEquivalentUrl
+ * Test two URLs for equivalence.
+ *
+ * Setting 'ignoreCase' allows for case-independent comparison.
+ *
+ * Comparison is based on:
+ * - Protocol
+ * - Host (evaluated without the port)
+ * - Port (set 'ignorePort80' to ignore "80" values)
+ * - Hash ( set 'ignoreHash' to disable)
+ * - Pathname (for relative <-> absolute comparison)
+ * - Arguments (so they can be out of order)
+ *
+ * Parameters:
+ * url1 - {String}
+ * url2 - {String}
+ * options - {Object} Allows for customization of comparison:
+ * 'ignoreCase' - Default is True
+ * 'ignorePort80' - Default is True
+ * 'ignoreHash' - Default is True
+ *
+ * Returns:
+ * {Boolean} Whether or not the two URLs are equivalent
+ */
+OpenLayers.Util.isEquivalentUrl = function(url1, url2, options) {
+ options = options || {};
+
+ OpenLayers.Util.applyDefaults(options, {
+ ignoreCase: true,
+ ignorePort80: true,
+ ignoreHash: true,
+ splitArgs: false
+ });
+
+ var urlObj1 = OpenLayers.Util.createUrlObject(url1, options);
+ var urlObj2 = OpenLayers.Util.createUrlObject(url2, options);
+
+ //compare all keys except for "args" (treated below)
+ for(var key in urlObj1) {
+ if(key !== "args") {
+ if(urlObj1[key] != urlObj2[key]) {
+ return false;
+ }
+ }
+ }
+
+ // compare search args - irrespective of order
+ for(var key in urlObj1.args) {
+ if(urlObj1.args[key] != urlObj2.args[key]) {
+ return false;
+ }
+ delete urlObj2.args[key];
+ }
+ // urlObj2 shouldn't have any args left
+ for(var key in urlObj2.args) {
+ return false;
+ }
+
+ return true;
+};
+
+/**
+ * Function: createUrlObject
+ *
+ * Parameters:
+ * url - {String}
+ * options - {Object} A hash of options.
+ *
+ * Valid options:
+ * ignoreCase - {Boolean} lowercase url,
+ * ignorePort80 - {Boolean} don't include explicit port if port is 80,
+ * ignoreHash - {Boolean} Don't include part of url after the hash (#).
+ * splitArgs - {Boolean} Split comma delimited params into arrays? Default is
+ * true.
+ *
+ * Returns:
+ * {Object} An object with separate url, a, port, host, and args parsed out
+ * and ready for comparison
+ */
+OpenLayers.Util.createUrlObject = function(url, options) {
+ options = options || {};
+
+ // deal with relative urls first
+ if(!(/^\w+:\/\//).test(url)) {
+ var loc = window.location;
+ var port = loc.port ? ":" + loc.port : "";
+ var fullUrl = loc.protocol + "//" + loc.host.split(":").shift() + port;
+ if(url.indexOf("/") === 0) {
+ // full pathname
+ url = fullUrl + url;
+ } else {
+ // relative to current path
+ var parts = loc.pathname.split("/");
+ parts.pop();
+ url = fullUrl + parts.join("/") + "/" + url;
+ }
+ }
+
+ if (options.ignoreCase) {
+ url = url.toLowerCase();
+ }
+
+ var a = document.createElement('a');
+ a.href = url;
+
+ var urlObject = {};
+
+ //host (without port)
+ urlObject.host = a.host.split(":").shift();
+
+ //protocol
+ urlObject.protocol = a.protocol;
+
+ //port (get uniform browser behavior with port 80 here)
+ if(options.ignorePort80) {
+ urlObject.port = (a.port == "80" || a.port == "0") ? "" : a.port;
+ } else {
+ urlObject.port = (a.port == "" || a.port == "0") ? "80" : a.port;
+ }
+
+ //hash
+ urlObject.hash = (options.ignoreHash || a.hash === "#") ? "" : a.hash;
+
+ //args
+ var queryString = a.search;
+ if (!queryString) {
+ var qMark = url.indexOf("?");
+ queryString = (qMark != -1) ? url.substr(qMark) : "";
+ }
+ urlObject.args = OpenLayers.Util.getParameters(queryString,
+ {splitArgs: options.splitArgs});
+
+ // pathname
+ //
+ // This is a workaround for Internet Explorer where
+ // window.location.pathname has a leading "/", but
+ // a.pathname has no leading "/".
+ urlObject.pathname = (a.pathname.charAt(0) == "/") ? a.pathname : "/" + a.pathname;
+
+ return urlObject;
+};
+
+/**
+ * Function: removeTail
+ * Takes a url and removes everything after the ? and #
+ *
+ * Parameters:
+ * url - {String} The url to process
+ *
+ * Returns:
+ * {String} The string with all queryString and Hash removed
+ */
+OpenLayers.Util.removeTail = function(url) {
+ var head = null;
+
+ var qMark = url.indexOf("?");
+ var hashMark = url.indexOf("#");
+
+ if (qMark == -1) {
+ head = (hashMark != -1) ? url.substr(0,hashMark) : url;
+ } else {
+ head = (hashMark != -1) ? url.substr(0,Math.min(qMark, hashMark))
+ : url.substr(0, qMark);
+ }
+ return head;
+};
+
+/**
+ * Constant: IS_GECKO
+ * {Boolean} True if the userAgent reports the browser to use the Gecko engine
+ */
+OpenLayers.IS_GECKO = (function() {
+ var ua = navigator.userAgent.toLowerCase();
+ return ua.indexOf("webkit") == -1 && ua.indexOf("gecko") != -1;
+})();
+
+/**
+ * Constant: CANVAS_SUPPORTED
+ * {Boolean} True if canvas 2d is supported.
+ */
+OpenLayers.CANVAS_SUPPORTED = (function() {
+ var elem = document.createElement('canvas');
+ return !!(elem.getContext && elem.getContext('2d'));
+})();
+
+/**
+ * Constant: BROWSER_NAME
+ * {String}
+ * A substring of the navigator.userAgent property. Depending on the userAgent
+ * property, this will be the empty string or one of the following:
+ * * "opera" -- Opera
+ * * "msie" -- Internet Explorer
+ * * "safari" -- Safari
+ * * "firefox" -- Firefox
+ * * "mozilla" -- Mozilla
+ */
+OpenLayers.BROWSER_NAME = (function() {
+ var name = "";
+ var ua = navigator.userAgent.toLowerCase();
+ if (ua.indexOf("opera") != -1) {
+ name = "opera";
+ } else if (ua.indexOf("msie") != -1) {
+ name = "msie";
+ } else if (ua.indexOf("safari") != -1) {
+ name = "safari";
+ } else if (ua.indexOf("mozilla") != -1) {
+ if (ua.indexOf("firefox") != -1) {
+ name = "firefox";
+ } else {
+ name = "mozilla";
+ }
+ }
+ return name;
+})();
+
+/**
+ * Function: getBrowserName
+ *
+ * Returns:
+ * {String} A string which specifies which is the current
+ * browser in which we are running.
+ *
+ * Currently-supported browser detection and codes:
+ * * 'opera' -- Opera
+ * * 'msie' -- Internet Explorer
+ * * 'safari' -- Safari
+ * * 'firefox' -- Firefox
+ * * 'mozilla' -- Mozilla
+ *
+ * If we are unable to property identify the browser, we
+ * return an empty string.
+ */
+OpenLayers.Util.getBrowserName = function() {
+ return OpenLayers.BROWSER_NAME;
+};
+
+/**
+ * Method: getRenderedDimensions
+ * Renders the contentHTML offscreen to determine actual dimensions for
+ * popup sizing. As we need layout to determine dimensions the content
+ * is rendered -9999px to the left and absolute to ensure the
+ * scrollbars do not flicker
+ *
+ * Parameters:
+ * contentHTML
+ * size - {<OpenLayers.Size>} If either the 'w' or 'h' properties is
+ * specified, we fix that dimension of the div to be measured. This is
+ * useful in the case where we have a limit in one dimension and must
+ * therefore meaure the flow in the other dimension.
+ * options - {Object}
+ *
+ * Allowed Options:
+ * displayClass - {String} Optional parameter. A CSS class name(s) string
+ * to provide the CSS context of the rendered content.
+ * containerElement - {DOMElement} Optional parameter. Insert the HTML to
+ * this node instead of the body root when calculating dimensions.
+ *
+ * Returns:
+ * {<OpenLayers.Size>}
+ */
+OpenLayers.Util.getRenderedDimensions = function(contentHTML, size, options) {
+
+ var w, h;
+
+ // create temp container div with restricted size
+ var container = document.createElement("div");
+ container.style.visibility = "hidden";
+
+ var containerElement = (options && options.containerElement)
+ ? options.containerElement : document.body;
+
+ // Opera and IE7 can't handle a node with position:aboslute if it inherits
+ // position:absolute from a parent.
+ var parentHasPositionAbsolute = false;
+ var superContainer = null;
+ var parent = containerElement;
+ while (parent && parent.tagName.toLowerCase()!="body") {
+ var parentPosition = OpenLayers.Element.getStyle(parent, "position");
+ if(parentPosition == "absolute") {
+ parentHasPositionAbsolute = true;
+ break;
+ } else if (parentPosition && parentPosition != "static") {
+ break;
+ }
+ parent = parent.parentNode;
+ }
+ if(parentHasPositionAbsolute && (containerElement.clientHeight === 0 ||
+ containerElement.clientWidth === 0) ){
+ superContainer = document.createElement("div");
+ superContainer.style.visibility = "hidden";
+ superContainer.style.position = "absolute";
+ superContainer.style.overflow = "visible";
+ superContainer.style.width = document.body.clientWidth + "px";
+ superContainer.style.height = document.body.clientHeight + "px";
+ superContainer.appendChild(container);
+ }
+ container.style.position = "absolute";
+
+ //fix a dimension, if specified.
+ if (size) {
+ if (size.w) {
+ w = size.w;
+ container.style.width = w + "px";
+ } else if (size.h) {
+ h = size.h;
+ container.style.height = h + "px";
+ }
+ }
+
+ //add css classes, if specified
+ if (options && options.displayClass) {
+ container.className = options.displayClass;
+ }
+
+ // create temp content div and assign content
+ var content = document.createElement("div");
+ content.innerHTML = contentHTML;
+
+ // we need overflow visible when calculating the size
+ content.style.overflow = "visible";
+ if (content.childNodes) {
+ for (var i=0, l=content.childNodes.length; i<l; i++) {
+ if (!content.childNodes[i].style) continue;
+ content.childNodes[i].style.overflow = "visible";
+ }
+ }
+
+ // add content to restricted container
+ container.appendChild(content);
+
+ // append container to body for rendering
+ if (superContainer) {
+ containerElement.appendChild(superContainer);
+ } else {
+ containerElement.appendChild(container);
+ }
+
+ // calculate scroll width of content and add corners and shadow width
+ if (!w) {
+ w = parseInt(content.scrollWidth);
+
+ // update container width to allow height to adjust
+ container.style.width = w + "px";
+ }
+ // capture height and add shadow and corner image widths
+ if (!h) {
+ h = parseInt(content.scrollHeight);
+ }
+
+ // remove elements
+ container.removeChild(content);
+ if (superContainer) {
+ superContainer.removeChild(container);
+ containerElement.removeChild(superContainer);
+ } else {
+ containerElement.removeChild(container);
+ }
+
+ return new OpenLayers.Size(w, h);
+};
+
+/**
+ * APIFunction: getScrollbarWidth
+ * This function has been modified by the OpenLayers from the original version,
+ * written by Matthew Eernisse and released under the Apache 2
+ * license here:
+ *
+ * http://www.fleegix.org/articles/2006/05/30/getting-the-scrollbar-width-in-pixels
+ *
+ * It has been modified simply to cache its value, since it is physically
+ * impossible that this code could ever run in more than one browser at
+ * once.
+ *
+ * Returns:
+ * {Integer}
+ */
+OpenLayers.Util.getScrollbarWidth = function() {
+
+ var scrollbarWidth = OpenLayers.Util._scrollbarWidth;
+
+ if (scrollbarWidth == null) {
+ var scr = null;
+ var inn = null;
+ var wNoScroll = 0;
+ var wScroll = 0;
+
+ // Outer scrolling div
+ scr = document.createElement('div');
+ scr.style.position = 'absolute';
+ scr.style.top = '-1000px';
+ scr.style.left = '-1000px';
+ scr.style.width = '100px';
+ scr.style.height = '50px';
+ // Start with no scrollbar
+ scr.style.overflow = 'hidden';
+
+ // Inner content div
+ inn = document.createElement('div');
+ inn.style.width = '100%';
+ inn.style.height = '200px';
+
+ // Put the inner div in the scrolling div
+ scr.appendChild(inn);
+ // Append the scrolling div to the doc
+ document.body.appendChild(scr);
+
+ // Width of the inner div sans scrollbar
+ wNoScroll = inn.offsetWidth;
+
+ // Add the scrollbar
+ scr.style.overflow = 'scroll';
+ // Width of the inner div width scrollbar
+ wScroll = inn.offsetWidth;
+
+ // Remove the scrolling div from the doc
+ document.body.removeChild(document.body.lastChild);
+
+ // Pixel width of the scroller
+ OpenLayers.Util._scrollbarWidth = (wNoScroll - wScroll);
+ scrollbarWidth = OpenLayers.Util._scrollbarWidth;
+ }
+
+ return scrollbarWidth;
+};
+
+/**
+ * APIFunction: getFormattedLonLat
+ * This function will return latitude or longitude value formatted as
+ *
+ * Parameters:
+ * coordinate - {Float} the coordinate value to be formatted
+ * axis - {String} value of either 'lat' or 'lon' to indicate which axis is to
+ * to be formatted (default = lat)
+ * dmsOption - {String} specify the precision of the output can be one of:
+ * 'dms' show degrees minutes and seconds
+ * 'dm' show only degrees and minutes
+ * 'd' show only degrees
+ *
+ * Returns:
+ * {String} the coordinate value formatted as a string
+ */
+OpenLayers.Util.getFormattedLonLat = function(coordinate, axis, dmsOption) {
+ if (!dmsOption) {
+ dmsOption = 'dms'; //default to show degree, minutes, seconds
+ }
+
+ coordinate = (coordinate+540)%360 - 180; // normalize for sphere being round
+
+ var abscoordinate = Math.abs(coordinate);
+ var coordinatedegrees = Math.floor(abscoordinate);
+
+ var coordinateminutes = (abscoordinate - coordinatedegrees)/(1/60);
+ var tempcoordinateminutes = coordinateminutes;
+ coordinateminutes = Math.floor(coordinateminutes);
+ var coordinateseconds = (tempcoordinateminutes - coordinateminutes)/(1/60);
+ coordinateseconds = Math.round(coordinateseconds*10);
+ coordinateseconds /= 10;
+
+ if( coordinateseconds >= 60) {
+ coordinateseconds -= 60;
+ coordinateminutes += 1;
+ if( coordinateminutes >= 60) {
+ coordinateminutes -= 60;
+ coordinatedegrees += 1;
+ }
+ }
+
+ if( coordinatedegrees < 10 ) {
+ coordinatedegrees = "0" + coordinatedegrees;
+ }
+ var str = coordinatedegrees + "\u00B0";
+
+ if (dmsOption.indexOf('dm') >= 0) {
+ if( coordinateminutes < 10 ) {
+ coordinateminutes = "0" + coordinateminutes;
+ }
+ str += coordinateminutes + "'";
+
+ if (dmsOption.indexOf('dms') >= 0) {
+ if( coordinateseconds < 10 ) {
+ coordinateseconds = "0" + coordinateseconds;
+ }
+ str += coordinateseconds + '"';
+ }
+ }
+
+ if (axis == "lon") {
+ str += coordinate < 0 ? OpenLayers.i18n("W") : OpenLayers.i18n("E");
+ } else {
+ str += coordinate < 0 ? OpenLayers.i18n("S") : OpenLayers.i18n("N");
+ }
+ return str;
+};
+
+/* ======================================================================
+ OpenLayers/Events.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+
+/**
+ * @requires OpenLayers/Util.js
+ */
+
+/**
+ * Namespace: OpenLayers.Event
+ * Utility functions for event handling.
+ */
+OpenLayers.Event = {
+
+ /**
+ * Property: observers
+ * {Object} A hashtable cache of the event observers. Keyed by
+ * element._eventCacheID
+ */
+ observers: false,
+
+ /**
+ * Constant: KEY_SPACE
+ * {int}
+ */
+ KEY_SPACE: 32,
+
+ /**
+ * Constant: KEY_BACKSPACE
+ * {int}
+ */
+ KEY_BACKSPACE: 8,
+
+ /**
+ * Constant: KEY_TAB
+ * {int}
+ */
+ KEY_TAB: 9,
+
+ /**
+ * Constant: KEY_RETURN
+ * {int}
+ */
+ KEY_RETURN: 13,
+
+ /**
+ * Constant: KEY_ESC
+ * {int}
+ */
+ KEY_ESC: 27,
+
+ /**
+ * Constant: KEY_LEFT
+ * {int}
+ */
+ KEY_LEFT: 37,
+
+ /**
+ * Constant: KEY_UP
+ * {int}
+ */
+ KEY_UP: 38,
+
+ /**
+ * Constant: KEY_RIGHT
+ * {int}
+ */
+ KEY_RIGHT: 39,
+
+ /**
+ * Constant: KEY_DOWN
+ * {int}
+ */
+ KEY_DOWN: 40,
+
+ /**
+ * Constant: KEY_DELETE
+ * {int}
+ */
+ KEY_DELETE: 46,
+
+
+ /**
+ * Method: element
+ * Cross browser event element detection.
+ *
+ * Parameters:
+ * event - {Event}
+ *
+ * Returns:
+ * {DOMElement} The element that caused the event
+ */
+ element: function(event) {
+ return event.target || event.srcElement;
+ },
+
+ /**
+ * Method: isSingleTouch
+ * Determine whether event was caused by a single touch
+ *
+ * Parameters:
+ * event - {Event}
+ *
+ * Returns:
+ * {Boolean}
+ */
+ isSingleTouch: function(event) {
+ return event.touches && event.touches.length == 1;
+ },
+
+ /**
+ * Method: isMultiTouch
+ * Determine whether event was caused by a multi touch
+ *
+ * Parameters:
+ * event - {Event}
+ *
+ * Returns:
+ * {Boolean}
+ */
+ isMultiTouch: function(event) {
+ return event.touches && event.touches.length > 1;
+ },
+
+ /**
+ * Method: isLeftClick
+ * Determine whether event was caused by a left click.
+ *
+ * Parameters:
+ * event - {Event}
+ *
+ * Returns:
+ * {Boolean}
+ */
+ isLeftClick: function(event) {
+ return (((event.which) && (event.which == 1)) ||
+ ((event.button) && (event.button == 1)));
+ },
+
+ /**
+ * Method: isRightClick
+ * Determine whether event was caused by a right mouse click.
+ *
+ * Parameters:
+ * event - {Event}
+ *
+ * Returns:
+ * {Boolean}
+ */
+ isRightClick: function(event) {
+ return (((event.which) && (event.which == 3)) ||
+ ((event.button) && (event.button == 2)));
+ },
+
+ /**
+ * Method: stop
+ * Stops an event from propagating.
+ *
+ * Parameters:
+ * event - {Event}
+ * allowDefault - {Boolean} If true, we stop the event chain but
+ * still allow the default browser behaviour (text selection,
+ * radio-button clicking, etc). Default is false.
+ */
+ stop: function(event, allowDefault) {
+
+ if (!allowDefault) {
+ OpenLayers.Event.preventDefault(event);
+ }
+
+ if (event.stopPropagation) {
+ event.stopPropagation();
+ } else {
+ event.cancelBubble = true;
+ }
+ },
+
+ /**
+ * Method: preventDefault
+ * Cancels the event if it is cancelable, without stopping further
+ * propagation of the event.
+ *
+ * Parameters:
+ * event - {Event}
+ */
+ preventDefault: function(event) {
+ if (event.preventDefault) {
+ event.preventDefault();
+ } else {
+ event.returnValue = false;
+ }
+ },
+
+ /**
+ * Method: findElement
+ *
+ * Parameters:
+ * event - {Event}
+ * tagName - {String}
+ *
+ * Returns:
+ * {DOMElement} The first node with the given tagName, starting from the
+ * node the event was triggered on and traversing the DOM upwards
+ */
+ findElement: function(event, tagName) {
+ var element = OpenLayers.Event.element(event);
+ while (element.parentNode && (!element.tagName ||
+ (element.tagName.toUpperCase() != tagName.toUpperCase()))){
+ element = element.parentNode;
+ }
+ return element;
+ },
+
+ /**
+ * Method: observe
+ *
+ * Parameters:
+ * elementParam - {DOMElement || String}
+ * name - {String}
+ * observer - {function}
+ * useCapture - {Boolean}
+ */
+ observe: function(elementParam, name, observer, useCapture) {
+ var element = OpenLayers.Util.getElement(elementParam);
+ useCapture = useCapture || false;
+
+ if (name == 'keypress' &&
+ (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
+ || element.attachEvent)) {
+ name = 'keydown';
+ }
+
+ //if observers cache has not yet been created, create it
+ if (!this.observers) {
+ this.observers = {};
+ }
+
+ //if not already assigned, make a new unique cache ID
+ if (!element._eventCacheID) {
+ var idPrefix = "eventCacheID_";
+ if (element.id) {
+ idPrefix = element.id + "_" + idPrefix;
+ }
+ element._eventCacheID = OpenLayers.Util.createUniqueID(idPrefix);
+ }
+
+ var cacheID = element._eventCacheID;
+
+ //if there is not yet a hash entry for this element, add one
+ if (!this.observers[cacheID]) {
+ this.observers[cacheID] = [];
+ }
+
+ //add a new observer to this element's list
+ this.observers[cacheID].push({
+ 'element': element,
+ 'name': name,
+ 'observer': observer,
+ 'useCapture': useCapture
+ });
+
+ //add the actual browser event listener
+ if (element.addEventListener) {
+ element.addEventListener(name, observer, useCapture);
+ } else if (element.attachEvent) {
+ element.attachEvent('on' + name, observer);
+ }
+ },
+
+ /**
+ * Method: stopObservingElement
+ * Given the id of an element to stop observing, cycle through the
+ * element's cached observers, calling stopObserving on each one,
+ * skipping those entries which can no longer be removed.
+ *
+ * parameters:
+ * elementParam - {DOMElement || String}
+ */
+ stopObservingElement: function(elementParam) {
+ var element = OpenLayers.Util.getElement(elementParam);
+ var cacheID = element._eventCacheID;
+
+ this._removeElementObservers(OpenLayers.Event.observers[cacheID]);
+ },
+
+ /**
+ * Method: _removeElementObservers
+ *
+ * Parameters:
+ * elementObservers - {Array(Object)} Array of (element, name,
+ * observer, usecapture) objects,
+ * taken directly from hashtable
+ */
+ _removeElementObservers: function(elementObservers) {
+ if (elementObservers) {
+ for(var i = elementObservers.length-1; i >= 0; i--) {
+ var entry = elementObservers[i];
+ OpenLayers.Event.stopObserving.apply(this, [
+ entry.element, entry.name, entry.observer, entry.useCapture
+ ]);
+ }
+ }
+ },
+
+ /**
+ * Method: stopObserving
+ *
+ * Parameters:
+ * elementParam - {DOMElement || String}
+ * name - {String}
+ * observer - {function}
+ * useCapture - {Boolean}
+ *
+ * Returns:
+ * {Boolean} Whether or not the event observer was removed
+ */
+ stopObserving: function(elementParam, name, observer, useCapture) {
+ useCapture = useCapture || false;
+
+ var element = OpenLayers.Util.getElement(elementParam);
+ var cacheID = element._eventCacheID;
+
+ if (name == 'keypress') {
+ if ( navigator.appVersion.match(/Konqueror|Safari|KHTML/) ||
+ element.detachEvent) {
+ name = 'keydown';
+ }
+ }
+
+ // find element's entry in this.observers cache and remove it
+ var foundEntry = false;
+ var elementObservers = OpenLayers.Event.observers[cacheID];
+ if (elementObservers) {
+
+ // find the specific event type in the element's list
+ var i=0;
+ while(!foundEntry && i < elementObservers.length) {
+ var cacheEntry = elementObservers[i];
+
+ if ((cacheEntry.name == name) &&
+ (cacheEntry.observer == observer) &&
+ (cacheEntry.useCapture == useCapture)) {
+
+ elementObservers.splice(i, 1);
+ if (elementObservers.length == 0) {
+ delete OpenLayers.Event.observers[cacheID];
+ }
+ foundEntry = true;
+ break;
+ }
+ i++;
+ }
+ }
+
+ //actually remove the event listener from browser
+ if (foundEntry) {
+ if (element.removeEventListener) {
+ element.removeEventListener(name, observer, useCapture);
+ } else if (element && element.detachEvent) {
+ element.detachEvent('on' + name, observer);
+ }
+ }
+ return foundEntry;
+ },
+
+ /**
+ * Method: unloadCache
+ * Cycle through all the element entries in the events cache and call
+ * stopObservingElement on each.
+ */
+ unloadCache: function() {
+ // check for OpenLayers.Event before checking for observers, because
+ // OpenLayers.Event may be undefined in IE if no map instance was
+ // created
+ if (OpenLayers.Event && OpenLayers.Event.observers) {
+ for (var cacheID in OpenLayers.Event.observers) {
+ var elementObservers = OpenLayers.Event.observers[cacheID];
+ OpenLayers.Event._removeElementObservers.apply(this,
+ [elementObservers]);
+ }
+ OpenLayers.Event.observers = false;
+ }
+ },
+
+ CLASS_NAME: "OpenLayers.Event"
+};
+
+/* prevent memory leaks in IE */
+OpenLayers.Event.observe(window, 'unload', OpenLayers.Event.unloadCache, false);
+
+/**
+ * Class: OpenLayers.Events
+ */
+OpenLayers.Events = OpenLayers.Class({
+
+ /**
+ * Constant: BROWSER_EVENTS
+ * {Array(String)} supported events
+ */
+ BROWSER_EVENTS: [
+ "mouseover", "mouseout",
+ "mousedown", "mouseup", "mousemove",
+ "click", "dblclick", "rightclick", "dblrightclick",
+ "resize", "focus", "blur",
+ "touchstart", "touchmove", "touchend",
+ "keydown"
+ ],
+
+ /**
+ * Property: listeners
+ * {Object} Hashtable of Array(Function): events listener functions
+ */
+ listeners: null,
+
+ /**
+ * Property: object
+ * {Object} the code object issuing application events
+ */
+ object: null,
+
+ /**
+ * Property: element
+ * {DOMElement} the DOM element receiving browser events
+ */
+ element: null,
+
+ /**
+ * Property: eventHandler
+ * {Function} bound event handler attached to elements
+ */
+ eventHandler: null,
+
+ /**
+ * APIProperty: fallThrough
+ * {Boolean}
+ */
+ fallThrough: null,
+
+ /**
+ * APIProperty: includeXY
+ * {Boolean} Should the .xy property automatically be created for browser
+ * mouse events? In general, this should be false. If it is true, then
+ * mouse events will automatically generate a '.xy' property on the
+ * event object that is passed. (Prior to OpenLayers 2.7, this was true
+ * by default.) Otherwise, you can call the getMousePosition on the
+ * relevant events handler on the object available via the 'evt.object'
+ * property of the evt object. So, for most events, you can call:
+ * function named(evt) {
+ * this.xy = this.object.events.getMousePosition(evt)
+ * }
+ *
+ * This option typically defaults to false for performance reasons:
+ * when creating an events object whose primary purpose is to manage
+ * relatively positioned mouse events within a div, it may make
+ * sense to set it to true.
+ *
+ * This option is also used to control whether the events object caches
+ * offsets. If this is false, it will not: the reason for this is that
+ * it is only expected to be called many times if the includeXY property
+ * is set to true. If you set this to true, you are expected to clear
+ * the offset cache manually (using this.clearMouseCache()) if:
+ * the border of the element changes
+ * the location of the element in the page changes
+ */
+ includeXY: false,
+
+ /**
+ * APIProperty: extensions
+ * {Object} Event extensions registered with this instance. Keys are
+ * event types, values are {OpenLayers.Events.*} extension instances or
+ * {Boolean} for events that an instantiated extension provides in
+ * addition to the one it was created for.
+ *
+ * Extensions create an event in addition to browser events, which usually
+ * fires when a sequence of browser events is completed. Extensions are
+ * automatically instantiated when a listener is registered for an event
+ * provided by an extension.
+ *
+ * Extensions are created in the <OpenLayers.Events> namespace using
+ * <OpenLayers.Class>, and named after the event they provide.
+ * The constructor receives the target <OpenLayers.Events> instance as
+ * argument. Extensions that need to capture browser events before they
+ * propagate can register their listeners events using <register>, with
+ * {extension: true} as 4th argument.
+ *
+ * If an extension creates more than one event, an alias for each event
+ * type should be created and reference the same class. The constructor
+ * should set a reference in the target's extensions registry to itself.
+ *
+ * Below is a minimal extension that provides the "foostart" and "fooend"
+ * event types, which replace the native "click" event type if clicked on
+ * an element with the css class "foo":
+ *
+ * (code)
+ * OpenLayers.Events.foostart = OpenLayers.Class({
+ * initialize: function(target) {
+ * this.target = target;
+ * this.target.register("click", this, this.doStuff, {extension: true});
+ * // only required if extension provides more than one event type
+ * this.target.extensions["foostart"] = true;
+ * this.target.extensions["fooend"] = true;
+ * },
+ * destroy: function() {
+ * var target = this.target;
+ * target.unregister("click", this, this.doStuff);
+ * delete this.target;
+ * // only required if extension provides more than one event type
+ * delete target.extensions["foostart"];
+ * delete target.extensions["fooend"];
+ * },
+ * doStuff: function(evt) {
+ * var propagate = true;
+ * if (OpenLayers.Event.element(evt).className === "foo") {
+ * propagate = false;
+ * var target = this.target;
+ * target.triggerEvent("foostart");
+ * window.setTimeout(function() {
+ * target.triggerEvent("fooend");
+ * }, 1000);
+ * }
+ * return propagate;
+ * }
+ * });
+ * // only required if extension provides more than one event type
+ * OpenLayers.Events.fooend = OpenLayers.Events.foostart;
+ * (end)
+ *
+ */
+ extensions: null,
+
+ /**
+ * Property: extensionCount
+ * {Object} Keys are event types (like in <listeners>), values are the
+ * number of extension listeners for each event type.
+ */
+ extensionCount: null,
+
+ /**
+ * Method: clearMouseListener
+ * A version of <clearMouseCache> that is bound to this instance so that
+ * it can be used with <OpenLayers.Event.observe> and
+ * <OpenLayers.Event.stopObserving>.
+ */
+ clearMouseListener: null,
+
+ /**
+ * Constructor: OpenLayers.Events
+ * Construct an OpenLayers.Events object.
+ *
+ * Parameters:
+ * object - {Object} The js object to which this Events object is being added
+ * element - {DOMElement} A dom element to respond to browser events
+ * eventTypes - {Array(String)} Deprecated. Array of custom application
+ * events. A listener may be registered for any named event, regardless
+ * of the values provided here.
+ * fallThrough - {Boolean} Allow events to fall through after these have
+ * been handled?
+ * options - {Object} Options for the events object.
+ */
+ initialize: function (object, element, eventTypes, fallThrough, options) {
+ OpenLayers.Util.extend(this, options);
+ this.object = object;
+ this.fallThrough = fallThrough;
+ this.listeners = {};
+ this.extensions = {};
+ this.extensionCount = {};
+ this._msTouches = [];
+
+ // if a dom element is specified, add a listeners list
+ // for browser events on the element and register them
+ if (element != null) {
+ this.attachToElement(element);
+ }
+ },
+
+ /**
+ * APIMethod: destroy
+ */
+ destroy: function () {
+ for (var e in this.extensions) {
+ if (typeof this.extensions[e] !== "boolean") {
+ this.extensions[e].destroy();
+ }
+ }
+ this.extensions = null;
+ if (this.element) {
+ OpenLayers.Event.stopObservingElement(this.element);
+ if(this.element.hasScrollEvent) {
+ OpenLayers.Event.stopObserving(
+ window, "scroll", this.clearMouseListener
+ );
+ }
+ }
+ this.element = null;
+
+ this.listeners = null;
+ this.object = null;
+ this.fallThrough = null;
+ this.eventHandler = null;
+ },
+
+ /**
+ * APIMethod: addEventType
+ * Deprecated. Any event can be triggered without adding it first.
+ *
+ * Parameters:
+ * eventName - {String}
+ */
+ addEventType: function(eventName) {
+ },
+
+ /**
+ * Method: attachToElement
+ *
+ * Parameters:
+ * element - {HTMLDOMElement} a DOM element to attach browser events to
+ */
+ attachToElement: function (element) {
+ if (this.element) {
+ OpenLayers.Event.stopObservingElement(this.element);
+ } else {
+ // keep a bound copy of handleBrowserEvent() so that we can
+ // pass the same function to both Event.observe() and .stopObserving()
+ this.eventHandler = OpenLayers.Function.bindAsEventListener(
+ this.handleBrowserEvent, this
+ );
+
+ // to be used with observe and stopObserving
+ this.clearMouseListener = OpenLayers.Function.bind(
+ this.clearMouseCache, this
+ );
+ }
+ this.element = element;
+ var msTouch = !!window.navigator.msMaxTouchPoints;
+ var type;
+ for (var i = 0, len = this.BROWSER_EVENTS.length; i < len; i++) {
+ type = this.BROWSER_EVENTS[i];
+ // register the event cross-browser
+ OpenLayers.Event.observe(element, type, this.eventHandler
+ );
+ if (msTouch && type.indexOf('touch') === 0) {
+ this.addMsTouchListener(element, type, this.eventHandler);
+ }
+ }
+ // disable dragstart in IE so that mousedown/move/up works normally
+ OpenLayers.Event.observe(element, "dragstart", OpenLayers.Event.stop);
+ },
+
+ /**
+ * APIMethod: on
+ * Convenience method for registering listeners with a common scope.
+ * Internally, this method calls <register> as shown in the examples
+ * below.
+ *
+ * Example use:
+ * (code)
+ * // register a single listener for the "loadstart" event
+ * events.on({"loadstart": loadStartListener});
+ *
+ * // this is equivalent to the following
+ * events.register("loadstart", undefined, loadStartListener);
+ *
+ * // register multiple listeners to be called with the same `this` object
+ * events.on({
+ * "loadstart": loadStartListener,
+ * "loadend": loadEndListener,
+ * scope: object
+ * });
+ *
+ * // this is equivalent to the following
+ * events.register("loadstart", object, loadStartListener);
+ * events.register("loadend", object, loadEndListener);
+ * (end)
+ *
+ * Parameters:
+ * object - {Object}
+ */
+ on: function(object) {
+ for(var type in object) {
+ if(type != "scope" && object.hasOwnProperty(type)) {
+ this.register(type, object.scope, object[type]);
+ }
+ }
+ },
+
+ /**
+ * APIMethod: register
+ * Register an event on the events object.
+ *
+ * When the event is triggered, the 'func' function will be called, in the
+ * context of 'obj'. Imagine we were to register an event, specifying an
+ * OpenLayers.Bounds Object as 'obj'. When the event is triggered, the
+ * context in the callback function will be our Bounds object. This means
+ * that within our callback function, we can access the properties and
+ * methods of the Bounds object through the "this" variable. So our
+ * callback could execute something like:
+ * : leftStr = "Left: " + this.left;
+ *
+ * or
+ *
+ * : centerStr = "Center: " + this.getCenterLonLat();
+ *
+ * Parameters:
+ * type - {String} Name of the event to register
+ * obj - {Object} The object to bind the context to for the callback#.
+ * If no object is specified, default is the Events's 'object' property.
+ * func - {Function} The callback function. If no callback is
+ * specified, this function does nothing.
+ * priority - {Boolean|Object} If true, adds the new listener to the
+ * *front* of the events queue instead of to the end.
+ *
+ * Valid options for priority:
+ * extension - {Boolean} If true, then the event will be registered as
+ * extension event. Extension events are handled before all other
+ * events.
+ */
+ register: function (type, obj, func, priority) {
+ if (type in OpenLayers.Events && !this.extensions[type]) {
+ this.extensions[type] = new OpenLayers.Events[type](this);
+ }
+ if (func != null) {
+ if (obj == null) {
+ obj = this.object;
+ }
+ var listeners = this.listeners[type];
+ if (!listeners) {
+ listeners = [];
+ this.listeners[type] = listeners;
+ this.extensionCount[type] = 0;
+ }
+ var listener = {obj: obj, func: func};
+ if (priority) {
+ listeners.splice(this.extensionCount[type], 0, listener);
+ if (typeof priority === "object" && priority.extension) {
+ this.extensionCount[type]++;
+ }
+ } else {
+ listeners.push(listener);
+ }
+ }
+ },
+
+ /**
+ * APIMethod: registerPriority
+ * Same as register() but adds the new listener to the *front* of the
+ * events queue instead of to the end.
+ *
+ * TODO: get rid of this in 3.0 - Decide whether listeners should be
+ * called in the order they were registered or in reverse order.
+ *
+ *
+ * Parameters:
+ * type - {String} Name of the event to register
+ * obj - {Object} The object to bind the context to for the callback#.
+ * If no object is specified, default is the Events's
+ * 'object' property.
+ * func - {Function} The callback function. If no callback is
+ * specified, this function does nothing.
+ */
+ registerPriority: function (type, obj, func) {
+ this.register(type, obj, func, true);
+ },
+
+ /**
+ * APIMethod: un
+ * Convenience method for unregistering listeners with a common scope.
+ * Internally, this method calls <unregister> as shown in the examples
+ * below.
+ *
+ * Example use:
+ * (code)
+ * // unregister a single listener for the "loadstart" event
+ * events.un({"loadstart": loadStartListener});
+ *
+ * // this is equivalent to the following
+ * events.unregister("loadstart", undefined, loadStartListener);
+ *
+ * // unregister multiple listeners with the same `this` object
+ * events.un({
+ * "loadstart": loadStartListener,
+ * "loadend": loadEndListener,
+ * scope: object
+ * });
+ *
+ * // this is equivalent to the following
+ * events.unregister("loadstart", object, loadStartListener);
+ * events.unregister("loadend", object, loadEndListener);
+ * (end)
+ */
+ un: function(object) {
+ for(var type in object) {
+ if(type != "scope" && object.hasOwnProperty(type)) {
+ this.unregister(type, object.scope, object[type]);
+ }
+ }
+ },
+
+ /**
+ * APIMethod: unregister
+ *
+ * Parameters:
+ * type - {String}
+ * obj - {Object} If none specified, defaults to this.object
+ * func - {Function}
+ */
+ unregister: function (type, obj, func) {
+ if (obj == null) {
+ obj = this.object;
+ }
+ var listeners = this.listeners[type];
+ if (listeners != null) {
+ for (var i=0, len=listeners.length; i<len; i++) {
+ if (listeners[i].obj == obj && listeners[i].func == func) {
+ listeners.splice(i, 1);
+ break;
+ }
+ }
+ }
+ },
+
+ /**
+ * Method: remove
+ * Remove all listeners for a given event type. If type is not registered,
+ * does nothing.
+ *
+ * Parameters:
+ * type - {String}
+ */
+ remove: function(type) {
+ if (this.listeners[type] != null) {
+ this.listeners[type] = [];
+ }
+ },
+
+ /**
+ * APIMethod: triggerEvent
+ * Trigger a specified registered event.
+ *
+ * Parameters:
+ * type - {String}
+ * evt - {Event || Object} will be passed to the listeners.
+ *
+ * Returns:
+ * {Boolean} The last listener return. If a listener returns false, the
+ * chain of listeners will stop getting called.
+ */
+ triggerEvent: function (type, evt) {
+ var listeners = this.listeners[type];
+
+ // fast path
+ if(!listeners || listeners.length == 0) {
+ return undefined;
+ }
+
+ // prep evt object with object & div references
+ if (evt == null) {
+ evt = {};
+ }
+ evt.object = this.object;
+ evt.element = this.element;
+ if(!evt.type) {
+ evt.type = type;
+ }
+
+ // execute all callbacks registered for specified type
+ // get a clone of the listeners array to
+ // allow for splicing during callbacks
+ listeners = listeners.slice();
+ var continueChain;
+ for (var i=0, len=listeners.length; i<len; i++) {
+ var callback = listeners[i];
+ // bind the context to callback.obj
+ continueChain = callback.func.apply(callback.obj, [evt]);
+
+ if ((continueChain != undefined) && (continueChain == false)) {
+ // if callback returns false, execute no more callbacks.
+ break;
+ }
+ }
+ // don't fall through to other DOM elements
+ if (!this.fallThrough) {
+ OpenLayers.Event.stop(evt, true);
+ }
+ return continueChain;
+ },
+
+ /**
+ * Method: handleBrowserEvent
+ * Basically just a wrapper to the triggerEvent() function, but takes
+ * care to set a property 'xy' on the event with the current mouse
+ * position.
+ *
+ * Parameters:
+ * evt - {Event}
+ */
+ handleBrowserEvent: function (evt) {
+ var type = evt.type, listeners = this.listeners[type];
+ if(!listeners || listeners.length == 0) {
+ // noone's listening, bail out
+ return;
+ }
+ // add clientX & clientY to all events - corresponds to average x, y
+ var touches = evt.touches;
+ if (touches && touches[0]) {
+ var x = 0;
+ var y = 0;
+ var num = touches.length;
+ var touch;
+ for (var i=0; i<num; ++i) {
+ touch = this.getTouchClientXY(touches[i]);
+ x += touch.clientX;
+ y += touch.clientY;
+ }
+ evt.clientX = x / num;
+ evt.clientY = y / num;
+ }
+ if (this.includeXY) {
+ evt.xy = this.getMousePosition(evt);
+ }
+ this.triggerEvent(type, evt);
+ },
+
+ /**
+ * Method: getTouchClientXY
+ * WebKit has a few bugs for clientX/clientY. This method detects them
+ * and calculate the correct values.
+ *
+ * Parameters:
+ * evt - {Touch} a Touch object from a TouchEvent
+ *
+ * Returns:
+ * {Object} An object with only clientX and clientY properties with the
+ * calculated values.
+ */
+ getTouchClientXY: function (evt) {
+ // olMochWin is to override window, used for testing
+ var win = window.olMockWin || window,
+ winPageX = win.pageXOffset,
+ winPageY = win.pageYOffset,
+ x = evt.clientX,
+ y = evt.clientY;
+
+ if (evt.pageY === 0 && Math.floor(y) > Math.floor(evt.pageY) ||
+ evt.pageX === 0 && Math.floor(x) > Math.floor(evt.pageX)) {
+ // iOS4 include scroll offset in clientX/Y
+ x = x - winPageX;
+ y = y - winPageY;
+ } else if (y < (evt.pageY - winPageY) || x < (evt.pageX - winPageX) ) {
+ // Some Android browsers have totally bogus values for clientX/Y
+ // when scrolling/zooming a page
+ x = evt.pageX - winPageX;
+ y = evt.pageY - winPageY;
+ }
+
+ evt.olClientX = x;
+ evt.olClientY = y;
+
+ return {
+ clientX: x,
+ clientY: y
+ };
+ },
+
+ /**
+ * APIMethod: clearMouseCache
+ * Clear cached data about the mouse position. This should be called any
+ * time the element that events are registered on changes position
+ * within the page.
+ */
+ clearMouseCache: function() {
+ this.element.scrolls = null;
+ this.element.lefttop = null;
+ this.element.offsets = null;
+ },
+
+ /**
+ * Method: getMousePosition
+ *
+ * Parameters:
+ * evt - {Event}
+ *
+ * Returns:
+ * {<OpenLayers.Pixel>} The current xy coordinate of the mouse, adjusted
+ * for offsets
+ */
+ getMousePosition: function (evt) {
+ if (!this.includeXY) {
+ this.clearMouseCache();
+ } else if (!this.element.hasScrollEvent) {
+ OpenLayers.Event.observe(window, "scroll", this.clearMouseListener);
+ this.element.hasScrollEvent = true;
+ }
+
+ if (!this.element.scrolls) {
+ var viewportElement = OpenLayers.Util.getViewportElement();
+ this.element.scrolls = [
+ window.pageXOffset || viewportElement.scrollLeft,
+ window.pageYOffset || viewportElement.scrollTop
+ ];
+ }
+
+ if (!this.element.lefttop) {
+ this.element.lefttop = [
+ (document.documentElement.clientLeft || 0),
+ (document.documentElement.clientTop || 0)
+ ];
+ }
+
+ if (!this.element.offsets) {
+ this.element.offsets = OpenLayers.Util.pagePosition(this.element);
+ }
+
+ return new OpenLayers.Pixel(
+ (evt.clientX + this.element.scrolls[0]) - this.element.offsets[0]
+ - this.element.lefttop[0],
+ (evt.clientY + this.element.scrolls[1]) - this.element.offsets[1]
+ - this.element.lefttop[1]
+ );
+ },
+
+ /**
+ * Method: addMsTouchListener
+ *
+ * Parameters:
+ * element - {DOMElement} The DOM element to register the listener on
+ * type - {String} The event type
+ * handler - {Function} the handler
+ */
+ addMsTouchListener: function (element, type, handler) {
+ var eventHandler = this.eventHandler;
+ var touches = this._msTouches;
+
+ function msHandler(evt) {
+ handler(OpenLayers.Util.applyDefaults({
+ stopPropagation: function() {
+ for (var i=touches.length-1; i>=0; --i) {
+ touches[i].stopPropagation();
+ }
+ },
+ preventDefault: function() {
+ for (var i=touches.length-1; i>=0; --i) {
+ touches[i].preventDefault();
+ }
+ },
+ type: type
+ }, evt));
+ }
+
+ switch (type) {
+ case 'touchstart':
+ return this.addMsTouchListenerStart(element, type, msHandler);
+ case 'touchend':
+ return this.addMsTouchListenerEnd(element, type, msHandler);
+ case 'touchmove':
+ return this.addMsTouchListenerMove(element, type, msHandler);
+ default:
+ throw 'Unknown touch event type';
+ }
+ },
+
+ /**
+ * Method: addMsTouchListenerStart
+ *
+ * Parameters:
+ * element - {DOMElement} The DOM element to register the listener on
+ * type - {String} The event type
+ * handler - {Function} the handler
+ */
+ addMsTouchListenerStart: function(element, type, handler) {
+ var touches = this._msTouches;
+
+ var cb = function(e) {
+
+ var alreadyInArray = false;
+ for (var i=0, ii=touches.length; i<ii; ++i) {
+ if (touches[i].pointerId == e.pointerId) {
+ alreadyInArray = true;
+ break;
+ }
+ }
+ if (!alreadyInArray) {
+ touches.push(e);
+ }
+
+ e.touches = touches.slice();
+ handler(e);
+ };
+
+ OpenLayers.Event.observe(element, 'MSPointerDown', cb);
+
+ // Need to also listen for end events to keep the _msTouches list
+ // accurate
+ var internalCb = function(e) {
+ for (var i=0, ii=touches.length; i<ii; ++i) {
+ if (touches[i].pointerId == e.pointerId) {
+ touches.splice(i, 1);
+ break;
+ }
+ }
+ };
+ OpenLayers.Event.observe(element, 'MSPointerUp', internalCb);
+ },
+
+ /**
+ * Method: addMsTouchListenerMove
+ *
+ * Parameters:
+ * element - {DOMElement} The DOM element to register the listener on
+ * type - {String} The event type
+ * handler - {Function} the handler
+ */
+ addMsTouchListenerMove: function (element, type, handler) {
+ var touches = this._msTouches;
+ var cb = function(e) {
+
+ //Don't fire touch moves when mouse isn't down
+ if (e.pointerType == e.MSPOINTER_TYPE_MOUSE && e.buttons == 0) {
+ return;
+ }
+
+ if (touches.length == 1 && touches[0].pageX == e.pageX &&
+ touches[0].pageY == e.pageY) {
+ // don't trigger event when pointer has not moved
+ return;
+ }
+ for (var i=0, ii=touches.length; i<ii; ++i) {
+ if (touches[i].pointerId == e.pointerId) {
+ touches[i] = e;
+ break;
+ }
+ }
+
+ e.touches = touches.slice();
+ handler(e);
+ };
+
+ OpenLayers.Event.observe(element, 'MSPointerMove', cb);
+ },
+
+ /**
+ * Method: addMsTouchListenerEnd
+ *
+ * Parameters:
+ * element - {DOMElement} The DOM element to register the listener on
+ * type - {String} The event type
+ * handler - {Function} the handler
+ */
+ addMsTouchListenerEnd: function (element, type, handler) {
+ var touches = this._msTouches;
+
+ var cb = function(e) {
+
+ for (var i=0, ii=touches.length; i<ii; ++i) {
+ if (touches[i].pointerId == e.pointerId) {
+ touches.splice(i, 1);
+ break;
+ }
+ }
+
+ e.touches = touches.slice();
+ handler(e);
+ };
+
+ OpenLayers.Event.observe(element, 'MSPointerUp', cb);
+ },
+
+ CLASS_NAME: "OpenLayers.Events"
+});
+/* ======================================================================
+ OpenLayers/Events/buttonclick.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/Events.js
+ */
+
+/**
+ * Class: OpenLayers.Events.buttonclick
+ * Extension event type for handling buttons on top of a dom element. This
+ * event type fires "buttonclick" on its <target> when a button was
+ * clicked. Buttons are detected by the "olButton" class.
+ *
+ * This event type makes sure that button clicks do not interfere with other
+ * events that are registered on the same <element>.
+ *
+ * Event types provided by this extension:
+ * - *buttonclick* Triggered when a button is clicked. Listeners receive an
+ * object with a *buttonElement* property referencing the dom element of
+ * the clicked button, and an *buttonXY* property with the click position
+ * relative to the button.
+ */
+OpenLayers.Events.buttonclick = OpenLayers.Class({
+
+ /**
+ * Property: target
+ * {<OpenLayers.Events>} The events instance that the buttonclick event will
+ * be triggered on.
+ */
+ target: null,
+
+ /**
+ * Property: events
+ * {Array} Events to observe and conditionally stop from propagating when
+ * an element with the olButton class (or its olAlphaImg child) is
+ * clicked.
+ */
+ events: [
+ 'mousedown', 'mouseup', 'click', 'dblclick',
+ 'touchstart', 'touchmove', 'touchend', 'keydown'
+ ],
+
+ /**
+ * Property: startRegEx
+ * {RegExp} Regular expression to test Event.type for events that start
+ * a buttonclick sequence.
+ */
+ startRegEx: /^mousedown|touchstart$/,
+
+ /**
+ * Property: cancelRegEx
+ * {RegExp} Regular expression to test Event.type for events that cancel
+ * a buttonclick sequence.
+ */
+ cancelRegEx: /^touchmove$/,
+
+ /**
+ * Property: completeRegEx
+ * {RegExp} Regular expression to test Event.type for events that complete
+ * a buttonclick sequence.
+ */
+ completeRegEx: /^mouseup|touchend$/,
+
+ /**
+ * Property: startEvt
+ * {Event} The event that started the click sequence
+ */
+
+ /**
+ * Constructor: OpenLayers.Events.buttonclick
+ * Construct a buttonclick event type. Applications are not supposed to
+ * create instances of this class - they are created on demand by
+ * <OpenLayers.Events> instances.
+ *
+ * Parameters:
+ * target - {<OpenLayers.Events>} The events instance that the buttonclick
+ * event will be triggered on.
+ */
+ initialize: function(target) {
+ this.target = target;
+ for (var i=this.events.length-1; i>=0; --i) {
+ this.target.register(this.events[i], this, this.buttonClick, {
+ extension: true
+ });
+ }
+ },
+
+ /**
+ * Method: destroy
+ */
+ destroy: function() {
+ for (var i=this.events.length-1; i>=0; --i) {
+ this.target.unregister(this.events[i], this, this.buttonClick);
+ }
+ delete this.target;
+ },
+
+ /**
+ * Method: getPressedButton
+ * Get the pressed button, if any. Returns undefined if no button
+ * was pressed.
+ *
+ * Arguments:
+ * element - {DOMElement} The event target.
+ *
+ * Returns:
+ * {DOMElement} The button element, or undefined.
+ */
+ getPressedButton: function(element) {
+ var depth = 3, // limit the search depth
+ button;
+ do {
+ if(OpenLayers.Element.hasClass(element, "olButton")) {
+ // hit!
+ button = element;
+ break;
+ }
+ element = element.parentNode;
+ } while(--depth > 0 && element);
+ return button;
+ },
+
+ /**
+ * Method: ignore
+ * Check for event target elements that should be ignored by OpenLayers.
+ *
+ * Parameters:
+ * element - {DOMElement} The event target.
+ */
+ ignore: function(element) {
+ var depth = 3,
+ ignore = false;
+ do {
+ if (element.nodeName.toLowerCase() === 'a') {
+ ignore = true;
+ break;
+ }
+ element = element.parentNode;
+ } while (--depth > 0 && element);
+ return ignore;
+ },
+
+ /**
+ * Method: buttonClick
+ * Check if a button was clicked, and fire the buttonclick event
+ *
+ * Parameters:
+ * evt - {Event}
+ */
+ buttonClick: function(evt) {
+ var propagate = true,
+ element = OpenLayers.Event.element(evt);
+ if (element && (OpenLayers.Event.isLeftClick(evt) || !~evt.type.indexOf("mouse"))) {
+ // was a button pressed?
+ var button = this.getPressedButton(element);
+ if (button) {
+ if (evt.type === "keydown") {
+ switch (evt.keyCode) {
+ case OpenLayers.Event.KEY_RETURN:
+ case OpenLayers.Event.KEY_SPACE:
+ this.target.triggerEvent("buttonclick", {
+ buttonElement: button
+ });
+ OpenLayers.Event.stop(evt);
+ propagate = false;
+ break;
+ }
+ } else if (this.startEvt) {
+ if (this.completeRegEx.test(evt.type)) {
+ var pos = OpenLayers.Util.pagePosition(button);
+ var viewportElement = OpenLayers.Util.getViewportElement();
+ var scrollTop = window.pageYOffset || viewportElement.scrollTop;
+ var scrollLeft = window.pageXOffset || viewportElement.scrollLeft;
+ pos[0] = pos[0] - scrollLeft;
+ pos[1] = pos[1] - scrollTop;
+
+ this.target.triggerEvent("buttonclick", {
+ buttonElement: button,
+ buttonXY: {
+ x: this.startEvt.clientX - pos[0],
+ y: this.startEvt.clientY - pos[1]
+ }
+ });
+ }
+ if (this.cancelRegEx.test(evt.type)) {
+ delete this.startEvt;
+ }
+ OpenLayers.Event.stop(evt);
+ propagate = false;
+ }
+ if (this.startRegEx.test(evt.type)) {
+ this.startEvt = evt;
+ OpenLayers.Event.stop(evt);
+ propagate = false;
+ }
+ } else {
+ propagate = !this.ignore(OpenLayers.Event.element(evt));
+ delete this.startEvt;
+ }
+ }
+ return propagate;
+ }
+
+});
+/* ======================================================================
+ OpenLayers/Util/vendorPrefix.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/SingleFile.js
+ */
+
+OpenLayers.Util = OpenLayers.Util || {};
+/**
+ * Namespace: OpenLayers.Util.vendorPrefix
+ * A collection of utility functions to detect vendor prefixed features
+ */
+OpenLayers.Util.vendorPrefix = (function() {
+ "use strict";
+
+ var VENDOR_PREFIXES = ["", "O", "ms", "Moz", "Webkit"],
+ divStyle = document.createElement("div").style,
+ cssCache = {},
+ jsCache = {};
+
+
+ /**
+ * Function: domToCss
+ * Converts a upper camel case DOM style property name to a CSS property
+ * i.e. transformOrigin -> transform-origin
+ * or WebkitTransformOrigin -> -webkit-transform-origin
+ *
+ * Parameters:
+ * prefixedDom - {String} The property to convert
+ *
+ * Returns:
+ * {String} The CSS property
+ */
+ function domToCss(prefixedDom) {
+ if (!prefixedDom) { return null; }
+ return prefixedDom.
+ replace(/([A-Z])/g, function(c) { return "-" + c.toLowerCase(); }).
+ replace(/^ms-/, "-ms-");
+ }
+
+ /**
+ * APIMethod: css
+ * Detect which property is used for a CSS property
+ *
+ * Parameters:
+ * property - {String} The standard (unprefixed) CSS property name
+ *
+ * Returns:
+ * {String} The standard CSS property, prefixed property or null if not
+ * supported
+ */
+ function css(property) {
+ if (cssCache[property] === undefined) {
+ var domProperty = property.
+ replace(/(-[\s\S])/g, function(c) { return c.charAt(1).toUpperCase(); });
+ var prefixedDom = style(domProperty);
+ cssCache[property] = domToCss(prefixedDom);
+ }
+ return cssCache[property];
+ }
+
+ /**
+ * APIMethod: js
+ * Detect which property is used for a JS property/method
+ *
+ * Parameters:
+ * obj - {Object} The object to test on
+ * property - {String} The standard (unprefixed) JS property name
+ *
+ * Returns:
+ * {String} The standard JS property, prefixed property or null if not
+ * supported
+ */
+ function js(obj, property) {
+ if (jsCache[property] === undefined) {
+ var tmpProp,
+ i = 0,
+ l = VENDOR_PREFIXES.length,
+ prefix,
+ isStyleObj = (typeof obj.cssText !== "undefined");
+
+ jsCache[property] = null;
+ for(; i<l; i++) {
+ prefix = VENDOR_PREFIXES[i];
+ if(prefix) {
+ if (!isStyleObj) {
+ // js prefix should be lower-case, while style
+ // properties have upper case on first character
+ prefix = prefix.toLowerCase();
+ }
+ tmpProp = prefix + property.charAt(0).toUpperCase() + property.slice(1);
+ } else {
+ tmpProp = property;
+ }
+
+ if(obj[tmpProp] !== undefined) {
+ jsCache[property] = tmpProp;
+ break;
+ }
+ }
+ }
+ return jsCache[property];
+ }
+
+ /**
+ * APIMethod: style
+ * Detect which property is used for a DOM style property
+ *
+ * Parameters:
+ * property - {String} The standard (unprefixed) style property name
+ *
+ * Returns:
+ * {String} The standard style property, prefixed property or null if not
+ * supported
+ */
+ function style(property) {
+ return js(divStyle, property);
+ }
+
+ return {
+ css: css,
+ js: js,
+ style: style,
+
+ // used for testing
+ cssCache: cssCache,
+ jsCache: jsCache
+ };
+}());
+/* ======================================================================
+ OpenLayers/Animation.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/SingleFile.js
+ * @requires OpenLayers/Util/vendorPrefix.js
+ */
+
+/**
+ * Namespace: OpenLayers.Animation
+ * A collection of utility functions for executing methods that repaint a
+ * portion of the browser window. These methods take advantage of the
+ * browser's scheduled repaints where requestAnimationFrame is available.
+ */
+OpenLayers.Animation = (function(window) {
+
+ /**
+ * Property: isNative
+ * {Boolean} true if a native requestAnimationFrame function is available
+ */
+ var requestAnimationFrame = OpenLayers.Util.vendorPrefix.js(window, "requestAnimationFrame");
+ var isNative = !!(requestAnimationFrame);
+
+ /**
+ * Function: requestFrame
+ * Schedule a function to be called at the next available animation frame.
+ * Uses the native method where available. Where requestAnimationFrame is
+ * not available, setTimeout will be called with a 16ms delay.
+ *
+ * Parameters:
+ * callback - {Function} The function to be called at the next animation frame.
+ * element - {DOMElement} Optional element that visually bounds the animation.
+ */
+ var requestFrame = (function() {
+ var request = window[requestAnimationFrame] ||
+ function(callback, element) {
+ window.setTimeout(callback, 16);
+ };
+ // bind to window to avoid illegal invocation of native function
+ return function(callback, element) {
+ request.apply(window, [callback, element]);
+ };
+ })();
+
+ // private variables for animation loops
+ var counter = 0;
+ var loops = {};
+
+ /**
+ * Function: start
+ * Executes a method with <requestFrame> in series for some
+ * duration.
+ *
+ * Parameters:
+ * callback - {Function} The function to be called at the next animation frame.
+ * duration - {Number} Optional duration for the loop. If not provided, the
+ * animation loop will execute indefinitely.
+ * element - {DOMElement} Optional element that visually bounds the animation.
+ *
+ * Returns:
+ * {Number} Identifier for the animation loop. Used to stop animations with
+ * <stop>.
+ */
+ function start(callback, duration, element) {
+ duration = duration > 0 ? duration : Number.POSITIVE_INFINITY;
+ var id = ++counter;
+ var start = +new Date;
+ loops[id] = function() {
+ if (loops[id] && +new Date - start <= duration) {
+ callback();
+ if (loops[id]) {
+ requestFrame(loops[id], element);
+ }
+ } else {
+ delete loops[id];
+ }
+ };
+ requestFrame(loops[id], element);
+ return id;
+ }
+
+ /**
+ * Function: stop
+ * Terminates an animation loop started with <start>.
+ *
+ * Parameters:
+ * id - {Number} Identifier returned from <start>.
+ */
+ function stop(id) {
+ delete loops[id];
+ }
+
+ return {
+ isNative: isNative,
+ requestFrame: requestFrame,
+ start: start,
+ stop: stop
+ };
+
+})(window);
+/* ======================================================================
+ OpenLayers/Tween.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes/Class.js
+ * @requires OpenLayers/Animation.js
+ */
+
+/**
+ * Namespace: OpenLayers.Tween
+ */
+OpenLayers.Tween = OpenLayers.Class({
+
+ /**
+ * APIProperty: easing
+ * {<OpenLayers.Easing>(Function)} Easing equation used for the animation
+ * Defaultly set to OpenLayers.Easing.Expo.easeOut
+ */
+ easing: null,
+
+ /**
+ * APIProperty: begin
+ * {Object} Values to start the animation with
+ */
+ begin: null,
+
+ /**
+ * APIProperty: finish
+ * {Object} Values to finish the animation with
+ */
+ finish: null,
+
+ /**
+ * APIProperty: duration
+ * {int} duration of the tween (number of steps)
+ */
+ duration: null,
+
+ /**
+ * APIProperty: callbacks
+ * {Object} An object with start, eachStep and done properties whose values
+ * are functions to be call during the animation. They are passed the
+ * current computed value as argument.
+ */
+ callbacks: null,
+
+ /**
+ * Property: time
+ * {int} Step counter
+ */
+ time: null,
+
+ /**
+ * APIProperty: minFrameRate
+ * {Number} The minimum framerate for animations in frames per second. After
+ * each step, the time spent in the animation is compared to the calculated
+ * time at this frame rate. If the animation runs longer than the calculated
+ * time, the next step is skipped. Default is 30.
+ */
+ minFrameRate: null,
+
+ /**
+ * Property: startTime
+ * {Number} The timestamp of the first execution step. Used for skipping
+ * frames
+ */
+ startTime: null,
+
+ /**
+ * Property: animationId
+ * {int} Loop id returned by OpenLayers.Animation.start
+ */
+ animationId: null,
+
+ /**
+ * Property: playing
+ * {Boolean} Tells if the easing is currently playing
+ */
+ playing: false,
+
+ /**
+ * Constructor: OpenLayers.Tween
+ * Creates a Tween.
+ *
+ * Parameters:
+ * easing - {<OpenLayers.Easing>(Function)} easing function method to use
+ */
+ initialize: function(easing) {
+ this.easing = (easing) ? easing : OpenLayers.Easing.Expo.easeOut;
+ },
+
+ /**
+ * APIMethod: start
+ * Plays the Tween, and calls the callback method on each step
+ *
+ * Parameters:
+ * begin - {Object} values to start the animation with
+ * finish - {Object} values to finish the animation with
+ * duration - {int} duration of the tween (number of steps)
+ * options - {Object} hash of options (callbacks (start, eachStep, done),
+ * minFrameRate)
+ */
+ start: function(begin, finish, duration, options) {
+ this.playing = true;
+ this.begin = begin;
+ this.finish = finish;
+ this.duration = duration;
+ this.callbacks = options.callbacks;
+ this.minFrameRate = options.minFrameRate || 30;
+ this.time = 0;
+ this.startTime = new Date().getTime();
+ OpenLayers.Animation.stop(this.animationId);
+ this.animationId = null;
+ if (this.callbacks && this.callbacks.start) {
+ this.callbacks.start.call(this, this.begin);
+ }
+ this.animationId = OpenLayers.Animation.start(
+ OpenLayers.Function.bind(this.play, this)
+ );
+ },
+
+ /**
+ * APIMethod: stop
+ * Stops the Tween, and calls the done callback
+ * Doesn't do anything if animation is already finished
+ */
+ stop: function() {
+ if (!this.playing) {
+ return;
+ }
+
+ if (this.callbacks && this.callbacks.done) {
+ this.callbacks.done.call(this, this.finish);
+ }
+ OpenLayers.Animation.stop(this.animationId);
+ this.animationId = null;
+ this.playing = false;
+ },
+
+ /**
+ * Method: play
+ * Calls the appropriate easing method
+ */
+ play: function() {
+ var value = {};
+ for (var i in this.begin) {
+ var b = this.begin[i];
+ var f = this.finish[i];
+ if (b == null || f == null || isNaN(b) || isNaN(f)) {
+ throw new TypeError('invalid value for Tween');
+ }
+
+ var c = f - b;
+ value[i] = this.easing.apply(this, [this.time, b, c, this.duration]);
+ }
+ this.time++;
+
+ if (this.callbacks && this.callbacks.eachStep) {
+ // skip frames if frame rate drops below threshold
+ if ((new Date().getTime() - this.startTime) / this.time <= 1000 / this.minFrameRate) {
+ this.callbacks.eachStep.call(this, value);
+ }
+ }
+
+ if (this.time > this.duration) {
+ this.stop();
+ }
+ },
+
+ /**
+ * Create empty functions for all easing methods.
+ */
+ CLASS_NAME: "OpenLayers.Tween"
+});
+
+/**
+ * Namespace: OpenLayers.Easing
+ *
+ * Credits:
+ * Easing Equations by Robert Penner, <http://www.robertpenner.com/easing/>
+ */
+OpenLayers.Easing = {
+ /**
+ * Create empty functions for all easing methods.
+ */
+ CLASS_NAME: "OpenLayers.Easing"
+};
+
+/**
+ * Namespace: OpenLayers.Easing.Linear
+ */
+OpenLayers.Easing.Linear = {
+
+ /**
+ * Function: easeIn
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeIn: function(t, b, c, d) {
+ return c*t/d + b;
+ },
+
+ /**
+ * Function: easeOut
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeOut: function(t, b, c, d) {
+ return c*t/d + b;
+ },
+
+ /**
+ * Function: easeInOut
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeInOut: function(t, b, c, d) {
+ return c*t/d + b;
+ },
+
+ CLASS_NAME: "OpenLayers.Easing.Linear"
+};
+
+/**
+ * Namespace: OpenLayers.Easing.Expo
+ */
+OpenLayers.Easing.Expo = {
+
+ /**
+ * Function: easeIn
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeIn: function(t, b, c, d) {
+ return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
+ },
+
+ /**
+ * Function: easeOut
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeOut: function(t, b, c, d) {
+ return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
+ },
+
+ /**
+ * Function: easeInOut
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeInOut: function(t, b, c, d) {
+ if (t==0) return b;
+ if (t==d) return b+c;
+ if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
+ return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
+ },
+
+ CLASS_NAME: "OpenLayers.Easing.Expo"
+};
+
+/**
+ * Namespace: OpenLayers.Easing.Quad
+ */
+OpenLayers.Easing.Quad = {
+
+ /**
+ * Function: easeIn
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeIn: function(t, b, c, d) {
+ return c*(t/=d)*t + b;
+ },
+
+ /**
+ * Function: easeOut
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeOut: function(t, b, c, d) {
+ return -c *(t/=d)*(t-2) + b;
+ },
+
+ /**
+ * Function: easeInOut
+ *
+ * Parameters:
+ * t - {Float} time
+ * b - {Float} beginning position
+ * c - {Float} total change
+ * d - {Float} duration of the transition
+ *
+ * Returns:
+ * {Float}
+ */
+ easeInOut: function(t, b, c, d) {
+ if ((t/=d/2) < 1) return c/2*t*t + b;
+ return -c/2 * ((--t)*(t-2) - 1) + b;
+ },
+
+ CLASS_NAME: "OpenLayers.Easing.Quad"
+};
+/* ======================================================================
+ OpenLayers/Projection.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes/Class.js
+ * @requires OpenLayers/Util.js
+ */
+
+/**
+ * Namespace: OpenLayers.Projection
+ * Methods for coordinate transforms between coordinate systems. By default,
+ * OpenLayers ships with the ability to transform coordinates between
+ * geographic (EPSG:4326) and web or spherical mercator (EPSG:900913 et al.)
+ * coordinate reference systems. See the <transform> method for details
+ * on usage.
+ *
+ * Additional transforms may be added by using the <proj4js at http://proj4js.org/>
+ * library. If the proj4js library is included, the <transform> method
+ * will work between any two coordinate reference systems with proj4js
+ * definitions.
+ *
+ * If the proj4js library is not included, or if you wish to allow transforms
+ * between arbitrary coordinate reference systems, use the <addTransform>
+ * method to register a custom transform method.
+ */
+OpenLayers.Projection = OpenLayers.Class({
+
+ /**
+ * Property: proj
+ * {Object} Proj4js.Proj instance.
+ */
+ proj: null,
+
+ /**
+ * Property: projCode
+ * {String}
+ */
+ projCode: null,
+
+ /**
+ * Property: titleRegEx
+ * {RegExp} regular expression to strip the title from a proj4js definition
+ */
+ titleRegEx: /\+title=[^\+]*/,
+
+ /**
+ * Constructor: OpenLayers.Projection
+ * This class offers several methods for interacting with a wrapped
+ * pro4js projection object.
+ *
+ * Parameters:
+ * projCode - {String} A string identifying the Well Known Identifier for
+ * the projection.
+ * options - {Object} An optional object to set additional properties
+ * on the projection.
+ *
+ * Returns:
+ * {<OpenLayers.Projection>} A projection object.
+ */
+ initialize: function(projCode, options) {
+ OpenLayers.Util.extend(this, options);
+ this.projCode = projCode;
+ if (typeof Proj4js == "object") {
+ this.proj = new Proj4js.Proj(projCode);
+ }
+ },
+
+ /**
+ * APIMethod: getCode
+ * Get the string SRS code.
+ *
+ * Returns:
+ * {String} The SRS code.
+ */
+ getCode: function() {
+ return this.proj ? this.proj.srsCode : this.projCode;
+ },
+
+ /**
+ * APIMethod: getUnits
+ * Get the units string for the projection -- returns null if
+ * proj4js is not available.
+ *
+ * Returns:
+ * {String} The units abbreviation.
+ */
+ getUnits: function() {
+ return this.proj ? this.proj.units : null;
+ },
+
+ /**
+ * Method: toString
+ * Convert projection to string (getCode wrapper).
+ *
+ * Returns:
+ * {String} The projection code.
+ */
+ toString: function() {
+ return this.getCode();
+ },
+
+ /**
+ * Method: equals
+ * Test equality of two projection instances. Determines equality based
+ * soley on the projection code.
+ *
+ * Returns:
+ * {Boolean} The two projections are equivalent.
+ */
+ equals: function(projection) {
+ var p = projection, equals = false;
+ if (p) {
+ if (!(p instanceof OpenLayers.Projection)) {
+ p = new OpenLayers.Projection(p);
+ }
+ if ((typeof Proj4js == "object") && this.proj.defData && p.proj.defData) {
+ equals = this.proj.defData.replace(this.titleRegEx, "") ==
+ p.proj.defData.replace(this.titleRegEx, "");
+ } else if (p.getCode) {
+ var source = this.getCode(), target = p.getCode();
+ equals = source == target ||
+ !!OpenLayers.Projection.transforms[source] &&
+ OpenLayers.Projection.transforms[source][target] ===
+ OpenLayers.Projection.nullTransform;
+ }
+ }
+ return equals;
+ },
+
+ /* Method: destroy
+ * Destroy projection object.
+ */
+ destroy: function() {
+ delete this.proj;
+ delete this.projCode;
+ },
+
+ CLASS_NAME: "OpenLayers.Projection"
+});
+
+/**
+ * Property: transforms
+ * {Object} Transforms is an object, with from properties, each of which may
+ * have a to property. This allows you to define projections without
+ * requiring support for proj4js to be included.
+ *
+ * This object has keys which correspond to a 'source' projection object. The
+ * keys should be strings, corresponding to the projection.getCode() value.
+ * Each source projection object should have a set of destination projection
+ * keys included in the object.
+ *
+ * Each value in the destination object should be a transformation function,
+ * where the function is expected to be passed an object with a .x and a .y
+ * property. The function should return the object, with the .x and .y
+ * transformed according to the transformation function.
+ *
+ * Note - Properties on this object should not be set directly. To add a
+ * transform method to this object, use the <addTransform> method. For an
+ * example of usage, see the OpenLayers.Layer.SphericalMercator file.
+ */
+OpenLayers.Projection.transforms = {};
+
+/**
+ * APIProperty: defaults
+ * {Object} Defaults for the SRS codes known to OpenLayers (currently
+ * EPSG:4326, CRS:84, urn:ogc:def:crs:EPSG:6.6:4326, EPSG:900913, EPSG:3857,
+ * EPSG:102113 and EPSG:102100). Keys are the SRS code, values are units,
+ * maxExtent (the validity extent for the SRS) and yx (true if this SRS is
+ * known to have a reverse axis order).
+ */
+OpenLayers.Projection.defaults = {
+ "EPSG:4326": {
+ units: "degrees",
+ maxExtent: [-180, -90, 180, 90],
+ yx: true
+ },
+ "CRS:84": {
+ units: "degrees",
+ maxExtent: [-180, -90, 180, 90]
+ },
+ "EPSG:900913": {
+ units: "m",
+ maxExtent: [-20037508.34, -20037508.34, 20037508.34, 20037508.34]
+ }
+};
+
+/**
+ * APIMethod: addTransform
+ * Set a custom transform method between two projections. Use this method in
+ * cases where the proj4js lib is not available or where custom projections
+ * need to be handled.
+ *
+ * Parameters:
+ * from - {String} The code for the source projection
+ * to - {String} the code for the destination projection
+ * method - {Function} A function that takes a point as an argument and
+ * transforms that point from the source to the destination projection
+ * in place. The original point should be modified.
+ */
+OpenLayers.Projection.addTransform = function(from, to, method) {
+ if (method === OpenLayers.Projection.nullTransform) {
+ var defaults = OpenLayers.Projection.defaults[from];
+ if (defaults && !OpenLayers.Projection.defaults[to]) {
+ OpenLayers.Projection.defaults[to] = defaults;
+ }
+ }
+ if(!OpenLayers.Projection.transforms[from]) {
+ OpenLayers.Projection.transforms[from] = {};
+ }
+ OpenLayers.Projection.transforms[from][to] = method;
+};
+
+/**
+ * APIMethod: transform
+ * Transform a point coordinate from one projection to another. Note that
+ * the input point is transformed in place.
+ *
+ * Parameters:
+ * point - {<OpenLayers.Geometry.Point> | Object} An object with x and y
+ * properties representing coordinates in those dimensions.
+ * source - {OpenLayers.Projection} Source map coordinate system
+ * dest - {OpenLayers.Projection} Destination map coordinate system
+ *
+ * Returns:
+ * point - {object} A transformed coordinate. The original point is modified.
+ */
+OpenLayers.Projection.transform = function(point, source, dest) {
+ if (source && dest) {
+ if (!(source instanceof OpenLayers.Projection)) {
+ source = new OpenLayers.Projection(source);
+ }
+ if (!(dest instanceof OpenLayers.Projection)) {
+ dest = new OpenLayers.Projection(dest);
+ }
+ if (source.proj && dest.proj) {
+ point = Proj4js.transform(source.proj, dest.proj, point);
+ } else {
+ var sourceCode = source.getCode();
+ var destCode = dest.getCode();
+ var transforms = OpenLayers.Projection.transforms;
+ if (transforms[sourceCode] && transforms[sourceCode][destCode]) {
+ transforms[sourceCode][destCode](point);
+ }
+ }
+ }
+ return point;
+};
+
+/**
+ * APIFunction: nullTransform
+ * A null transformation - useful for defining projection aliases when
+ * proj4js is not available:
+ *
+ * (code)
+ * OpenLayers.Projection.addTransform("EPSG:3857", "EPSG:900913",
+ * OpenLayers.Projection.nullTransform);
+ * OpenLayers.Projection.addTransform("EPSG:900913", "EPSG:3857",
+ * OpenLayers.Projection.nullTransform);
+ * (end)
+ */
+OpenLayers.Projection.nullTransform = function(point) {
+ return point;
+};
+
+/**
+ * Note: Transforms for web mercator <-> geographic
+ * OpenLayers recognizes EPSG:3857, EPSG:900913, EPSG:102113 and EPSG:102100.
+ * OpenLayers originally started referring to EPSG:900913 as web mercator.
+ * The EPSG has declared EPSG:3857 to be web mercator.
+ * ArcGIS 10 recognizes the EPSG:3857, EPSG:102113, and EPSG:102100 as
+ * equivalent. See http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/11/20/ArcGIS-Online-moving-to-Google-_2F00_-Bing-tiling-scheme_3A00_-What-does-this-mean-for-you_3F00_.aspx#12084.
+ * For geographic, OpenLayers recognizes EPSG:4326, CRS:84 and
+ * urn:ogc:def:crs:EPSG:6.6:4326. OpenLayers also knows about the reverse axis
+ * order for EPSG:4326.
+ */
+(function() {
+
+ var pole = 20037508.34;
+
+ function inverseMercator(xy) {
+ xy.x = 180 * xy.x / pole;
+ xy.y = 180 / Math.PI * (2 * Math.atan(Math.exp((xy.y / pole) * Math.PI)) - Math.PI / 2);
+ return xy;
+ }
+
+ function forwardMercator(xy) {
+ xy.x = xy.x * pole / 180;
+ var y = Math.log(Math.tan((90 + xy.y) * Math.PI / 360)) / Math.PI * pole;
+ xy.y = Math.max(-20037508.34, Math.min(y, 20037508.34));
+ return xy;
+ }
+
+ function map(base, codes) {
+ var add = OpenLayers.Projection.addTransform;
+ var same = OpenLayers.Projection.nullTransform;
+ var i, len, code, other, j;
+ for (i=0, len=codes.length; i<len; ++i) {
+ code = codes[i];
+ add(base, code, forwardMercator);
+ add(code, base, inverseMercator);
+ for (j=i+1; j<len; ++j) {
+ other = codes[j];
+ add(code, other, same);
+ add(other, code, same);
+ }
+ }
+ }
+
+ // list of equivalent codes for web mercator
+ var mercator = ["EPSG:900913", "EPSG:3857", "EPSG:102113", "EPSG:102100"],
+ geographic = ["CRS:84", "urn:ogc:def:crs:EPSG:6.6:4326", "EPSG:4326"],
+ i;
+ for (i=mercator.length-1; i>=0; --i) {
+ map(mercator[i], geographic);
+ }
+ for (i=geographic.length-1; i>=0; --i) {
+ map(geographic[i], mercator);
+ }
+
+})();
+/* ======================================================================
+ OpenLayers/Map.js
+ ====================================================================== */
+
+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/BaseTypes/Class.js
+ * @requires OpenLayers/Util.js
+ * @requires OpenLayers/Util/vendorPrefix.js
+ * @requires OpenLayers/Events.js
+ * @requires OpenLayers/Tween.js
+ * @requires OpenLayers/Projection.js
+ */
+
+/**
+ * Class: OpenLayers.Map
+ * Instances of OpenLayers.Map are interactive maps embedded in a web page.
+ * Create a new map with the <OpenLayers.Map> constructor.
+ *
+ * On their own maps do not provide much functionality. To extend a map
+ * it's necessary to add controls (<OpenLayers.Control>) and
+ * layers (<OpenLayers.Layer>) to the map.
+ */
+OpenLayers.Map = OpenLayers.Class({
+
+ /**
+ * Constant: Z_INDEX_BASE
+ * {Object} Base z-indexes for different classes of thing
+ */
+ Z_INDEX_BASE: {
+ BaseLayer: 100,
+ Overlay: 325,
+ Feature: 725,
+ Popup: 750,
+ Control: 1000
+ },
+
+ /**
+ * APIProperty: events
+ * {<OpenLayers.Events>}
+ *
+ * Register a listener for a particular event with the following syntax:
+ * (code)
+ * map.events.register(type, obj, listener);
+ * (end)
+ *
+ * Listeners will be called with a reference to an event object. The
+ * properties of this event depends on exactly what happened.
+ *
+ * All event objects have at least the following properties:
+ * object - {Object} A reference to map.events.object.
+ * element - {DOMElement} A reference to map.events.element.
+ *
+ * Browser events have the following additional properties:
+ * xy - {<OpenLayers.Pixel>} The pixel location of the event (relative
+ * to the the map viewport).
+ *
+ * Supported map event types:
+ * preaddlayer - triggered before a layer has been added. The event
+ * object will include a *layer* property that references the layer
+ * to be added. When a listener returns "false" the adding will be
+ * aborted.
+ * addlayer - triggered after a layer has been added. The event object
+ * will include a *layer* property that references the added layer.
+ * preremovelayer - triggered before a layer has been removed. The event
+ * object will include a *layer* property that references the layer
+ * to be removed. When a listener returns "false" the removal will be
+ * aborted.
+ * removelayer - triggered after a layer has been removed. The event
+ * object will include a *layer* property that references the removed
+ * layer.
+ * changelayer - triggered after a layer name change, order change,
+ * opacity change, params change, visibility change (actual visibility,
+ * not the layer's visibility property) or attribution change (due to
+ * extent change). Listeners will receive an event object with *layer*
+ * and *property* properties. The *layer* property will be a reference
+ * to the changed layer. The *property* property will be a key to the
+ * changed property (name, order, opacity, params, visibility or
+ * attribution).
+ * movestart - triggered after the start of a drag, pan, or zoom. The event
+ * object may include a *zoomChanged* property that tells whether the
+ * zoom has changed.
+ * move - triggered after each drag, pan, or zoom
+ * moveend - triggered after a drag, pan, or zoom completes
+ * zoomend - triggered after a zoom completes
+ * mouseover - triggered after mouseover the map
+ * mouseout - triggered after mouseout the map
+ * mousemove - triggered after mousemove the map
+ * changebaselayer - triggered after the base layer changes
+ * updatesize - triggered after the <updateSize> method was executed
+ */
+
+ /**
+ * Property: id
+ * {String} Unique identifier for the map
+ */
+ id: null,
+
+ /**
+ * Property: fractionalZoom
+ * {Boolean} For a base layer that supports it, allow the map resolution
+ * to be set to a value between one of the values in the resolutions
+ * array. Default is false.
+ *
+ * When fractionalZoom is set to true, it is possible to zoom to
+ * an arbitrary extent. This requires a base layer from a source
+ * that supports requests for arbitrary extents (i.e. not cached
+ * tiles on a regular lattice). This means that fractionalZoom
+ * will not work with commercial layers (Google, Yahoo, VE), layers
+ * using TileCache, or any other pre-cached data sources.
+ *
+ * If you are using fractionalZoom, then you should also use
+ * <getResolutionForZoom> instead of layer.resolutions[zoom] as the
+ * former works for non-integer zoom levels.
+ */
+ fractionalZoom: false,
+
+ /**
+ * APIProperty: events
+ * {<OpenLayers.Events>} An events object that handles all
+ * events on the map
+ */
+ events: null,
+
+ /**
+ * APIProperty: allOverlays
+ * {Boolean} Allow the map to function with "overlays" only. Defaults to
+ * false. If true, the lowest layer in the draw order will act as
+ * the base layer. In addition, if set to true, all layers will
+ * have isBaseLayer set to false when they are added to the map.
+ *
+ * Note:
+ * If you set map.allOverlays to true, then you *cannot* use
+ * map.setBaseLayer or layer.setIsBaseLayer. With allOverlays true,
+ * the lowest layer in the draw layer is the base layer. So, to change
+ * the base layer, use <setLayerIndex> or <raiseLayer> to set the layer
+ * index to 0.
+ */
+ allOverlays: false,
+
+ /**
+ * APIProperty: div
+ * {DOMElement|String} The element that contains the map (or an id for
+ * that element). If the <OpenLayers.Map> constructor is called
+ * with two arguments, this should be provided as the first argument.
+ * Alternatively, the map constructor can be called with the options
+ * object as the only argument. In this case (one argument), a
+ * div property may or may not be provided. If the div property
+ * is not provided, the map can be rendered to a container later
+ * using the <render> method.
+ *
+ * Note:
+ * If you are calling <render> after map construction, do not use
+ * <maxResolution> auto. Instead, divide your <maxExtent> by your
+ * maximum expected dimension.
+ */
+ div: null,
+
+ /**
+ * Property: dragging
+ * {Boolean} The map is currently being dragged.
+ */
+ dragging: false,
+
+ /**
+ * Property: size
+ * {<OpenLayers.Size>} Size of the main div (this.div)
+ */
+ size: null,
+
+ /**
+ * Property: viewPortDiv
+ * {HTMLDivElement} The element that represents the map viewport
+ */
+ viewPortDiv: null,
+
+ /**
+ * Property: layerContainerOrigin
+ * {<OpenLayers.LonLat>} The lonlat at which the later container was
+ * re-initialized (on-zoom)
+ */
+ layerContainerOrigin: null,
+
+ /**
+ * Property: layerContainerDiv
+ * {HTMLDivElement} The element that contains the layers.
+ */
+ layerContainerDiv: null,
+
+ /**
+ * APIProperty: layers
+ * {Array(<OpenLayers.Layer>)} Ordered list of layers in the map
+ */
+ layers: null,
+
+ /**
+ * APIProperty: controls
+ * {Array(<OpenLayers.Control>)} List of controls associated with the map.
+ *
+ * If not provided in the map options at construction, the map will
+ * by default be given the following controls if present in the build:
+ * - <OpenLayers.Control.Navigation> or <OpenLayers.Control.TouchNavigation>
+ * - <OpenLayers.Control.Zoom> or <OpenLayers.Control.PanZoom>
+ * - <OpenLayers.Control.ArgParser>
+ * - <OpenLayers.Control.Attribution>
+ */
+ controls: null,
+
+ /**
+ * Property: popups
+ * {Array(<OpenLayers.Popup>)} List of popups associated with the map
+ */
+ popups: null,
+
+ /**
+ * APIProperty: baseLayer
+ * {<OpenLayers.Layer>} The currently selected base layer. This determines
+ * min/max zoom level, projection, etc.
+ */
+ baseLayer: null,
+
+ /**
+ * Property: center
+ * {<OpenLayers.LonLat>} The current center of the map
+ */
+ center: null,
+
+ /**
+ * Property: resolution
+ * {Float} The resolution of the map.
+ */
+ resolution: null,
+
+ /**
+ * Property: zoom
+ * {Integer} The current zoom level of the map
+ */
+ zoom: 0,
+
+ /**
+ * Property: panRatio
+ * {Float} The ratio of the current extent within
+ * which panning will tween.
+ */
+ panRatio: 1.5,
+
+ /**
+ * APIProperty: options
+ * {Object} The options object passed to the class constructor. Read-only.
+ */
+ options: null,
+
+ // Options
+
+ /**
+ * APIProperty: tileSize
+ * {<OpenLayers.Size>} Set in the map options to override the default tile
+ * size for this map.
+ */
+ tileSize: null,
+
+ /**
+ * APIProperty: projection
+ * {String} Set in the map options to specify the default projection
+ * for layers added to this map. When using a projection other than EPSG:4326
+ * (CRS:84, Geographic) or EPSG:3857 (EPSG:900913, Web Mercator),
+ * also set maxExtent, maxResolution or resolutions. Default is "EPSG:4326".
+ * Note that the projection of the map is usually determined
+ * by that of the current baseLayer (see <baseLayer> and <getProjectionObject>).
+ */
+ projection: "EPSG:4326",
+
+ /**
+ * APIProperty: units
+ * {String} The map units. Possible values are 'degrees' (or 'dd'), 'm',
+ * 'ft', 'km', 'mi', 'inches'. Normally taken from the projection.
+ * Only required if both map and layers do not define a projection,
+ * or if they define a projection which does not define units
+ */
+ units: null,
+
+ /**
+ * APIProperty: resolutions
+ * {Array(Float)} A list of map resolutions (map units per pixel) in
+ * descending order. If this is not set in the layer constructor, it
+ * will be set based on other resolution related properties
+ * (maxExtent, maxResolution, maxScale, etc.).
+ */
+ resolutions: null,
+
+ /**
+ * APIProperty: maxResolution
+ * {Float} Required if you are not displaying the whole world on a tile
+ * with the size specified in <tileSize>.
+ */
+ maxResolution: null,
+
+ /**
+ * APIProperty: minResolution
+ * {Float}
+ */
+ minResolution: null,
+
+ /**
+ * APIProperty: maxScale
+ * {Float}
+ */
+ maxScale: null,
+
+ /**
+ * APIProperty: minScale
+ * {Float}
+ */
+ minScale: null,
+
+ /**
+ * APIProperty: maxExtent
+ * {<OpenLayers.Bounds>|Array} If provided as an array, the array
+ * should consist of four values (left, bottom, right, top).
+ * The maximum extent for the map.
+ * Default depends on projection; if this is one of those defined in OpenLayers.Projection.defaults
+ * (EPSG:4326 or web mercator), maxExtent will be set to the value defined there;
+ * else, defaults to null.
+ * To restrict user panning and zooming of the map, use <restrictedExtent> instead.
+ * The value for <maxExtent> will change calculations for tile URLs.
+ */
+ maxExtent: null,
+
+ /**
+ * APIProperty: minExtent
+ * {<OpenLayers.Bounds>|Array} If provided as an array, the array
+ * should consist of four values (left, bottom, right, top).
+ * The minimum extent for the map. Defaults to null.
+ */
+ minExtent: null,
+
+ /**
+ * APIProperty: restrictedExtent
+ * {<OpenLayers.Bounds>|Array} If provided as an array, the array
+ * should consist of four values (left, bottom, right, top).
+ * Limit map navigation to this extent where possible.
+ * If a non-null restrictedExtent is set, panning will be restricted
+ * to the given bounds. In addition, zooming to a resolution that
+ * displays more than the restricted extent will center the map
+ * on the restricted extent. If you wish to limit the zoom level
+ * or resolution, use maxResolution.
+ */
+ restrictedExtent: null,
+
+ /**
+ * APIProperty: numZoomLevels
+ * {Integer} Number of zoom levels for the map. Defaults to 16. Set a
+ * different value in the map options if needed.
+ */
+ numZoomLevels: 16,
+
+ /**
+ * APIProperty: theme
+ * {String} Relative path to a CSS file from which to load theme styles.
+ * Specify null in the map options (e.g. {theme: null}) if you
+ * want to get cascading style declarations - by putting links to
+ * stylesheets or style declarations directly in your page.
+ */
+ theme: null,
+
+ /**
+ * APIProperty: displayProjection
+ * {<OpenLayers.Projection>} Requires proj4js support for projections other
+ * than EPSG:4326 or EPSG:900913/EPSG:3857. Projection used by
+ * several controls to display data to user. If this property is set,
+ * it will be set on any control which has a null displayProjection
+ * property at the time the control is added to the map.
+ */
+ displayProjection: null,
+
+ /**
+ * APIProperty: tileManager
+ * {<OpenLayers.TileManager>|Object} By default, and if the build contains
+ * TileManager.js, the map will use the TileManager to queue image requests
+ * and to cache tile image elements. To create a map without a TileManager
+ * configure the map with tileManager: null. To create a TileManager with
+ * non-default options, supply the options instead or alternatively supply
+ * an instance of {<OpenLayers.TileManager>}.
+ */
+
+ /**
+ * APIProperty: fallThrough
+ * {Boolean} Should OpenLayers allow events on the map to fall through to
+ * other elements on the page, or should it swallow them? (#457)
+ * Default is to swallow.
+ */
+ fallThrough: false,
+
+ /**
+ * APIProperty: autoUpdateSize
+ * {Boolean} Should OpenLayers automatically update the size of the map
+ * when the resize event is fired. Default is true.
+ */
+ autoUpdateSize: true,
+
+ /**
+ * APIProperty: eventListeners
+ * {Object} If set as an option at construction, the eventListeners
+ * object will be registered with <OpenLayers.Events.on>. Object
+ * structure must be a listeners object as shown in the example for
+ * the events.on method.
+ */
+ eventListeners: null,
+
+ /**
+ * Property: panTween
+ * {<OpenLayers.Tween>} Animated panning tween object, see panTo()
+ */
+ panTween: null,
+
+ /**
+ * APIProperty: panMethod
+ * {Function} The Easing function to be used for tweening. Default is
+ * OpenLayers.Easing.Expo.easeOut. Setting this to 'null' turns off
+ * animated panning.
+ */
+ panMethod: OpenLayers.Easing.Expo.easeOut,
+
+ /**
+ * Property: panDuration
+ * {Integer} The number of steps to be passed to the
+ * OpenLayers.Tween.start() method when the map is
+ * panned.
+ * Default is 50.
+ */
+ panDuration: 50,
+
+ /**
+ * Property: zoomTween
+ * {<OpenLayers.Tween>} Animated zooming tween object, see zoomTo()
+ */
+ zoomTween: null,
+
+ /**
+ * APIProperty: zoomMethod
+ * {Function} The Easing function to be used for tweening. Default is
+ * OpenLayers.Easing.Quad.easeOut. Setting this to 'null' turns off
+ * animated zooming.
+ */
+ zoomMethod: OpenLayers.Easing.Quad.easeOut,
+
+ /**
+ * Property: zoomDuration
+ * {Integer} The number of steps to be passed to the
+ * OpenLayers.Tween.start() method when the map is zoomed.
+ * Default is 20.
+ */
+ zoomDuration: 20,
+
+ /**
+ * Property: paddingForPopups
+ * {<OpenLayers.Bounds>} Outside margin of the popup. Used to prevent
+ * the popup from getting too close to the map border.
+ */
+ paddingForPopups : null,
+
+ /**
+ * Property: layerContainerOriginPx
+ * {Object} Cached object representing the layer container origin (in pixels).
+ */
+ layerContainerOriginPx: null,
+
+ /**
+ * Property: minPx
+ * {Object} An object with a 'x' and 'y' values that is the lower
+ * left of maxExtent in viewport pixel space.
+ * Used to verify in moveByPx that the new location we're moving to
+ * is valid. It is also used in the getLonLatFromViewPortPx function
+ * of Layer.
+ */
+ minPx: null,
+
+ /**
+ * Property: maxPx
+ * {Object} An object with a 'x' and 'y' values that is the top
+ * right of maxExtent in viewport pixel space.
+ * Used to verify in moveByPx that the new location we're moving to
+ * is valid.
+ */
+ maxPx: null,
+
+ /**
+ * Constructor: OpenLayers.Map
+ * Constructor for a new OpenLayers.Map instance. There are two possible
+ * ways to call the map constructor. See the examples below.
+ *
+ * Parameters:
+ * div - {DOMElement|String} The element or id of an element in your page
+ * that will contain the map. May be omitted if the <div> option is
+ * provided or if you intend to call the <render> method later.
+ * options - {Object} Optional object with properties to tag onto the map.
+ *
+ * Valid options (in addition to the listed API properties):
+ * center - {<OpenLayers.LonLat>|Array} The default initial center of the map.
+ * If provided as array, the first value is the x coordinate,
+ * and the 2nd value is the y coordinate.
+ * Only specify if <layers> is provided.
+ * Note that if an ArgParser/Permalink control is present,
+ * and the querystring contains coordinates, center will be set
+ * by that, and this option will be ignored.
+ * zoom - {Number} The initial zoom level for the map. Only specify if
+ * <layers> is provided.
+ * Note that if an ArgParser/Permalink control is present,
+ * and the querystring contains a zoom level, zoom will be set
+ * by that, and this option will be ignored.
+ * extent - {<OpenLayers.Bounds>|Array} The initial extent of the map.
+ * If provided as an array, the array should consist of
+ * four values (left, bottom, right, top).
+ * Only specify if <center> and <zoom> are not provided.
+ *
+ * Examples:
+ * (code)
+ * // create a map with default options in an element with the id "map1"
+ * var map = new OpenLayers.Map("map1");
+ *
+ * // create a map with non-default options in an element with id "map2"
+ * var options = {
+ * projection: "EPSG:3857",
+ * maxExtent: new OpenLayers.Bounds(-200000, -200000, 200000, 200000),
+ * center: new OpenLayers.LonLat(-12356463.476333, 5621521.4854095)
+ * };
+ * var map = new OpenLayers.Map("map2", options);
+ *
+ * // map with non-default options - same as above but with a single argument,
+ * // a restricted extent, and using arrays for bounds and center
+ * var map = new OpenLayers.Map({
+ * div: "map_id",
+ * projection: "EPSG:3857",
+ * maxExtent: [-18924313.432222, -15538711.094146, 18924313.432222, 15538711.094146],
+ * restrictedExtent: [-13358338.893333, -9608371.5085962, 13358338.893333, 9608371.5085962],
+ * center: [-12356463.476333, 5621521.4854095]
+ * });
+ *
+ * // create a map without a reference to a container - call render later
+ * var map = new OpenLayers.Map({
+ * projection: "EPSG:3857",
+ * maxExtent: new OpenLayers.Bounds(-200000, -200000, 200000, 200000)
+ * });
+ * (end)
+ */
+ initialize: function (div, options) {
+
+ // If only one argument is provided, check if it is an object.
+ if(arguments.length === 1 && typeof div === "object") {
+ options = div;
+ div = options && options.div;
+ }
+
+ // Simple-type defaults are set in class definition.
+ // Now set complex-type defaults
+ this.tileSize = new OpenLayers.Size(OpenLayers.Map.TILE_WIDTH,
+ OpenLayers.Map.TILE_HEIGHT);
+
+ this.paddingForPopups = new OpenLayers.Bounds(15, 15, 15, 15);
+
+ this.theme = OpenLayers._getScriptLocation() +
+ 'theme/default/style.css';
+
+ // backup original options
+ this.options = OpenLayers.Util.extend({}, options);
+
+ // now override default options
+ OpenLayers.Util.extend(this, options);
+
+ var projCode = this.projection instanceof OpenLayers.Projection ?
+ this.projection.projCode : this.projection;
+ OpenLayers.Util.applyDefaults(this, OpenLayers.Projection.defaults[projCode]);
+
+ // allow extents and center to be arrays
+ if (this.maxExtent && !(this.maxExtent instanceof OpenLayers.Bounds)) {
+ this.maxExtent = new OpenLayers.Bounds(this.maxExtent);
+ }
+ if (this.minExtent && !(this.minExtent instanceof OpenLayers.Bounds)) {
+ this.minExtent = new OpenLayers.Bounds(this.minExtent);
+ }
+ if (this.restrictedExtent && !(this.restrictedExtent instanceof OpenLayers.Bounds)) {
+ this.restrictedExtent = new OpenLayers.Bounds(this.restrictedExtent);
+ }
+ if (this.center && !(this.center instanceof OpenLayers.LonLat)) {
+ this.center = new OpenLayers.LonLat(this.center);
+ }
+
+ // initialize layers array
+ this.layers = [];
+
+ this.id = OpenLayers.Util.createUniqueID("OpenLayers.Map_");
+
+ this.div = OpenLayers.Util.getElement(div);
+ if(!this.div) {
+ this.div = document.createElement("div");
+ this.div.style.height = "1px";
+ this.div.style.width = "1px";
+ }
+
+ OpenLayers.Element.addClass(this.div, 'olMap');
+
+ // the viewPortDiv is the outermost div we modify
+ var id = this.id + "_OpenLayers_ViewPort";
+ this.viewPortDiv = OpenLayers.Util.createDiv(id, null, null, null,
+ "relative", null,
+ "hidden");
+ this.viewPortDiv.style.width = "100%";
+ this.viewPortDiv.style.height = "100%";
+ this.viewPortDiv.className = "olMapViewport";
+ this.div.appendChild(this.viewPortDiv);
+
+ this.events = new OpenLayers.Events(
+ this, this.viewPortDiv, null, this.fallThrough,
+ {includeXY: true}
+ );
+
+ if (OpenLayers.TileManager && this.tileManager !== null) {
+ if (!(this.tileManager instanceof OpenLayers.TileManager)) {
+ this.tileManager = new OpenLayers.TileManager(this.tileManager);
+ }
+ this.tileManager.addMap(this);
+ }
+
+ // the layerContainerDiv is the one that holds all the layers
+ id = this.id + "_OpenLayers_Container";
+ this.layerContainerDiv = OpenLayers.Util.createDiv(id);
+ this.layerContainerDiv.style.zIndex=this.Z_INDEX_BASE['Popup']-1;
+ this.layerContainerOriginPx = {x: 0, y: 0};
+ this.applyTransform();
+
+ this.viewPortDiv.appendChild(this.layerContainerDiv);
+
+ this.updateSize();
+ if(this.eventListeners instanceof Object) {
+ this.events.on(this.eventListeners);
+ }
+
+ if (this.autoUpdateSize === true) {
+ // updateSize on catching the window's resize
+ // Note that this is ok, as updateSize() does nothing if the
+ // map's size has not actually changed.
+ this.updateSizeDestroy = OpenLayers.Function.bind(this.updateSize,
+ this);
+ OpenLayers.Event.observe(window, 'resize',
+ this.updateSizeDestroy);
+ }
+
+ // only append link stylesheet if the theme property is set
+ if(this.theme) {
+ // check existing links for equivalent url
+ var addNode = true;
+ var nodes = document.getElementsByTagName('link');
+ for(var i=0, len=nodes.length; i<len; ++i) {
+ if(OpenLayers.Util.isEquivalentUrl(nodes.item(i).href,
+ this.theme)) {
+ addNode = false;
+ break;
+ }
+ }
+ // only add a new node if one with an equivalent url hasn't already
+ // been added
+ if(addNode) {
+ var cssNode = document.createElement('link');
+ cssNode.setAttribute('rel', 'stylesheet');
+ cssNode.setAttribute('type', 'text/css');
+ cssNode.setAttribute('href', this.theme);
+ document.getElementsByTagName('head')[0].appendChild(cssNode);
+ }
+ }
+
+ if (this.controls == null) { // default controls
+ this.controls = [];
+ if (OpenLayers.Control != null) { // running full or lite?
+ // Navigation or TouchNavigation depending on what is in build
+ if (OpenLayers.Control.Navigation) {
+ this.controls.push(new OpenLayers.Control.Navigation());
+ } else if (OpenLayers.Control.TouchNavigation) {
+ this.controls.push(new OpenLayers.Control.TouchNavigation());
+ }
+ if (OpenLayers.Control.Zoom) {
+ this.controls.push(new OpenLayers.Control.Zoom());
+ } else if (OpenLayers.Control.PanZoom) {
+ this.controls.push(new OpenLayers.Control.PanZoom());
+ }
+
+ if (OpenLayers.Control.ArgParser) {
+ this.controls.push(new OpenLayers.Control.ArgParser());
+ }
+ if (OpenLayers.Control.Attribution) {
+ this.controls.push(new OpenLayers.Control.Attribution());
+ }
+ }
+ }
+
+ for(var i=0, len=this.controls.length; i<len; i++) {
+ this.addControlToMap(this.controls[i]);
+ }
+
+ this.popups = [];
+
+ this.unloadDestroy = OpenLayers.Function.bind(this.destroy, this);
+
+
+ // always call map.destroy()
+ OpenLayers.Event.observe(window, 'unload', this.unloadDestroy);
+
+ // add any initial layers
+ if (options && options.layers) {
+ /**
+ * If you have set options.center, the map center property will be
+ * set at this point. However, since setCenter has not been called,
+ * addLayers gets confused. So we delete the map center in this
+ * case. Because the check below uses options.center, it will
+ * be properly set below.
+ */
+ delete this.center;
+ delete this.zoom;
+ this.addLayers(options.layers);
+ // set center (and optionally zoom)
+ if (options.center && !this.getCenter()) {
+ // zoom can be undefined here
+ this.setCenter(options.center, options.zoom);
+ }
+ }
+
+ if (this.panMethod) {
+ this.panTween = new OpenLayers.Tween(this.panMethod);
+ }
+ if (this.zoomMethod && this.applyTransform.transform) {
+ this.zoomTween = new OpenLayers.Tween(this.zoomMethod);
+ }
+ },
+
+ /**
+ * APIMethod: getViewport
+ * Get the DOMElement representing the view port.
+ *
+ * Returns:
+ * {DOMElement}
+ */
+ getViewport: function() {
+ return this.viewPortDiv;
+ },
+
+ /**
+ * APIMethod: render
+ * Render the map to a specified container.
+ *
+ * Parameters:
+ * div - {String|DOMElement} The container that the map should be rendered
+ * to. If different than the current container, the map viewport
+ * will be moved from the current to the new container.
+ */
+ render: function(div) {
+ this.div = OpenLayers.Util.getElement(div);
+ OpenLayers.Element.addClass(this.div, 'olMap');
+ this.viewPortDiv.parentNode.removeChild(this.viewPortDiv);
+ this.div.appendChild(this.viewPortDiv);
+ this.updateSize();
+ },
+
+ /**
+ * Method: unloadDestroy
+ * Function that is called to destroy the map on page unload. stored here
+ * so that if map is manually destroyed, we can unregister this.
+ */
+ unloadDestroy: null,
+
+ /**
+ * Method: updateSizeDestroy
+ * When the map is destroyed, we need to stop listening to updateSize
+ * events: this method stores the function we need to unregister in
+ * non-IE browsers.
+ */
+ updateSizeDestroy: null,
+
+ /**
+ * APIMethod: destroy
+ * Destroy this map.
+ * Note that if you are using an application which removes a container
+ * of the map from the DOM, you need to ensure that you destroy the
+ * map *before* this happens; otherwise, the page unload handler
+ * will fail because the DOM elements that map.destroy() wants
+ * to clean up will be gone. (See
+ * http://trac.osgeo.org/openlayers/ticket/2277 for more information).
+ * This will apply to GeoExt and also to other applications which
+ * modify the DOM of the container of the OpenLayers Map.
+ */
+ destroy:function() {
+ // if unloadDestroy is null, we've already been destroyed
+ if (!this.unloadDestroy) {
+ return false;
+ }
+
+ // make sure panning doesn't continue after destruction
+ if(this.panTween) {
+ this.panTween.stop();
+ this.panTween = null;
+ }
+ // make sure zooming doesn't continue after destruction
+ if(this.zoomTween) {
+ this.zoomTween.stop();
+ this.zoomTween = null;
+ }
+
+ // map has been destroyed. dont do it again!
+ OpenLayers.Event.stopObserving(window, 'unload', this.unloadDestroy);
+ this.unloadDestroy = null;
+
+ if (this.updateSizeDestroy) {
+ OpenLayers.Event.stopObserving(window, 'resize',
+ this.updateSizeDestroy);
+ }
+
+ this.paddingForPopups = null;
+
+ if (this.controls != null) {
+ for (var i = this.controls.length - 1; i>=0; --i) {
+ this.controls[i].destroy();
+ }
+ this.controls = null;
+ }
+ if (this.layers != null) {
+ for (var i = this.layers.length - 1; i>=0; --i) {
+ //pass 'false' to destroy so that map wont try to set a new
+ // baselayer after each baselayer is removed
+ this.layers[i].destroy(false);
+ }
+ this.layers = null;
+ }
+ if (this.viewPortDiv && this.viewPortDiv.parentNode) {
+ this.viewPortDiv.parentNode.removeChild(this.viewPortDiv);
+ }
+ this.viewPortDiv = null;
+
+ if (this.tileManager) {
+ this.tileManager.removeMap(this);
+ this.tileManager = null;
+ }
+
+ if(this.eventListeners) {
+ this.events.un(this.eventListeners);
+ this.eventListeners = null;
+ }
+ this.events.destroy();
+ this.events = null;
+
+ this.options = null;
+ },
+
+ /**
+ * APIMethod: setOptions
+ * Change the map options
+ *
+ * Parameters:
+ * options - {Object} Hashtable of options to tag to the map
+ */
+ setOptions: function(options) {
+ var updatePxExtent = this.minPx &&
+ options.restrictedExtent != this.restrictedExtent;
+ OpenLayers.Util.extend(this, options);
+ // force recalculation of minPx and maxPx
+ updatePxExtent && this.moveTo(this.getCachedCenter(), this.zoom, {
+ forceZoomChange: true
+ });
+ },
+
+ /**
+ * APIMethod: getTileSize
+ * Get the tile size for the map
+ *
+ * Returns:
+ * {<OpenLayers.Size>}
+ */
+ getTileSize: function() {
+ return this.tileSize;
+ },
+
+
+ /**
+ * APIMethod: getBy
+ * Get a list of objects given a property and a match item.
+ *
+ * Parameters:
+ * array - {String} A property on the map whose value is an array.
+ * property - {String} A property on each item of the given array.
+ * match - {String | Object} A string to match. Can also be a regular
+ * expression literal or object. In addition, it can be any object
+ * with a method named test. For reqular expressions or other, if
+ * match.test(map[array][i][property]) evaluates to true, the item will
+ * be included in the array returned. If no items are found, an empty
+ * array is returned.
+ *
+ * Returns:
+ * {Array} An array of items where the given property matches the given
+ * criteria.
+ */
+ getBy: function(array, property, match) {
+ var test = (typeof match.test == "function");
+ var found = OpenLayers.Array.filter(this[array], function(item) {
+ return item[property] == match || (test && match.test(item[property]));
+ });
+ return found;
+ },
+
+ /**
+ * APIMethod: getLayersBy
+ * Get a list of layers with properties matching the given criteria.
+ *
+ * Parameters:
+ * property - {String} A layer property to be matched.
+ * match - {String | Object} A string to match. Can also be a regular
+ * expression literal or object. In addition, it can be any object
+ * with a method named test. For reqular expressions or other, if
+ * match.test(layer[property]) evaluates to true, the layer will be
+ * included in the array returned. If no layers are found, an empty
+ * array is returned.
+ *
+ * Returns:
+ * {Array(<OpenLayers.Layer>)} A list of layers matching the given criteria.
+ * An empty array is returned if no matches are found.
+ */
+ getLayersBy: function(property, match) {
+ return this.getBy("layers", property, match);
+ },
+
+ /**
+ * APIMethod: getLayersByName
+ * Get a list of layers with names matching the given name.
+ *
+ * Parameters:
+ * match - {String | Object} A layer name. The name can also be a regular
+ * expression literal or object. In addition, it can be any object
+ * with a method named test. For reqular expressions or other, if
+ * name.test(layer.name) evaluates to true, the layer will be included
+ * in the list of layers returned. If no layers are found, an empty
+ * array is returned.
+ *
+ * Returns:
+ * {Array(<OpenLayers.Layer>)} A list of layers matching the given name.
+ * An empty array is returned if no matches are found.
+ */
+ getLayersByName: function(match) {
+ return this.getLayersBy("name", match);
+ },
+
+ /**
+ * APIMethod: getLayersByClass
+ * Get a list of layers of a given class (CLASS_NAME).
+ *
+ * Parameters:
+ * match - {String | Object} A layer class name. The match can also be a
+ * regular expression literal or object. In addition, it can be any
+ * object with a method named test. For reqular expressions or other,
+ * if type.test(layer.CLASS_NAME) evaluates to true, the layer will
+ * be included in the list of layers returned. If no layers are
+ * found, an empty array is returned.
+ *
+ * Returns:
+ * {Array(<OpenLayers.Layer>)} A list of layers matching the given class.
+ * An empty array is returned if no matches are found.
+ */
+ getLayersByClass: function(match) {
+ return this.getLayersBy("CLASS_NAME", match);
+ },
+
+ /**
+ * APIMethod: getControlsBy
+ * Get a list of controls with properties matching the given criteria.
+ *
+ * Parameters:
+ * property - {String} A control property to be matched.
+ * match - {String | Object} A string to match. Can also be a regular
+ * expression literal or object. In addition, it can be any object
+ * with a method named test. For reqular expressions or other, if
+ * match.test(layer[property]) evaluates to true, the layer will be
+ * included in the array returned. If no layers are found, an empty
+ * array is returned.
+ *
+ * Returns:
+ * {Array(<OpenLayers.Control>)} A list of controls matching the given
+ * criteria. An empty array is returned if no matches are found.
+ */
+ getControlsBy: function(property, match) {
+ return this.getBy("controls", property, match);
+ },
+
+ /**
+ * APIMethod: getControlsByClass
+ * Get a list of controls of a given class (CLASS_NAME).
+ *
+ * Parameters:
+ * match - {String | Object} A control class name. The match can also be a
+ * regular expression literal or object. In addition, it can be any
+ * object with a method named test. For reqular expressions or other,
+ * if type.test(control.CLASS_NAME) evaluates to true, the control will
+ * be included in the list of controls returned. If no controls are
+ * found, an empty array is returned.
+ *
+ * Returns:
+ * {Array(<OpenLayers.Control>)} A list of controls matching the given class.
+ * An empty array is returned if no matches are found.
+ */
+ getControlsByClass: function(match) {
+ return this.getControlsBy("CLASS_NAME", match);
+ },
+
+ /********************************************************/
+ /* */
+ /* Layer Functions */
+ /* */
+ /* The following functions deal with adding and */
+ /* removing Layers to and from the Map */
+ /* */
+ /********************************************************/
+
+ /**
+ * APIMethod: getLayer
+ * Get a layer based on its id
+ *
+ * Parameters:
+ * id - {String} A layer id
+ *
+ * Returns:
+ * {<OpenLayers.Layer>} The Layer with the corresponding id from the map's
+ * layer collection, or null if not found.
+ */
+ getLayer: function(id) {
+ var foundLayer = null;
+ for (var i=0, len=this.layers.length; i<len; i++) {
+ var layer = this.layers[i];
+ if (layer.id == id) {
+ foundLayer = layer;
+ break;
+ }
+ }
+ return foundLayer;
+ },
+
+ /**
+ * Method: setLayerZIndex
+ *
+ * Parameters:
+ * layer - {<OpenLayers.Layer>}
+ * zIdx - {int}
+ */
+ setLayerZIndex: function (layer, zIdx) {
+ layer.setZIndex(
+ this.Z_INDEX_BASE[layer.isBaseLayer ? 'BaseLayer' : 'Overlay']
+ + zIdx * 5 );
+ },
+
+ /**
+ * Method: resetLayersZIndex
+ * Reset each layer's z-index based on layer's array index
+ */
+ resetLayersZIndex: function() {
+ for (var i=0, len=this.layers.length; i<len; i++) {
+ var layer = this.layers[i];
+ this.setLayerZIndex(layer, i);
+ }
+ },
+
+ /**
+ * APIMethod: addLayer
+ *
+ * Parameters:
+ * layer - {<OpenLayers.Layer>}
+ *
+ * Returns:
+ * {Boolean} True if the layer has been added to the map.
+ */
+ addLayer: function (layer) {
+ for(var i = 0, len = this.layers.length; i < len; i++) {
+ if (this.layers[i] == layer) {
+ return false;
+ }
+ }
+ if (this.events.triggerEvent("preaddlayer", {layer: layer}) === false) {
+ return false;
+ }
+ if(this.allOverlays) {
+ layer.isBaseLayer = false;
+ }
+
+ layer.div.className = "olLayerDiv";
+ layer.div.style.overflow = "";
+ this.setLayerZIndex(layer, this.layers.length);
+
+ if (layer.isFixed) {
+ this.viewPortDiv.appendChild(layer.div);
+ } else {
+ this.layerContainerDiv.appendChild(layer.div);
+ }
+ this.layers.push(layer);
+ layer.setMap(this);
+
+ if (layer.isBaseLayer || (this.allOverlays && !this.baseLayer)) {
+ if (this.baseLayer == null) {
+ // set the first baselaye we add as the baselayer
+ this.setBaseLayer(layer);
+ } else {
+ layer.setVisibility(false);
+ }
+ } else {
+ layer.redraw();
+ }
+
+ this.events.triggerEvent("addlayer", {layer: layer});
+ layer.events.triggerEvent("added", {map: this, layer: layer});
+ layer.afterAdd();
+
+ return true;
+ },
+
+ /**
+ * APIMethod: addLayers
+ *
+ * Parameters:
+ * layers - {Array(<OpenLayers.Layer>)}
+ */
+ addLayers: function (layers) {
+ for (var i=0, len=layers.length; i<len; i++) {
+ this.addLayer(layers[i]);
+ }
+ },
+
+ /**
+ * APIMethod: removeLayer
+ * Removes a layer from the map by removing its visual element (the
+ * layer.div property), then removing it from the map's internal list
+ * of layers, setting the layer's map property to null.
+ *
+ * a "removelayer" event is triggered.
+ *
+ * very worthy of mention is that simply removing a layer from a map
+ * will not cause the removal of any popups which may have been created
+ * by the layer. this is due to the fact that it was decided at some
+ * point that popups would not belong to layers. thus there is no way
+ * for us to know here to which layer the popup belongs.
+ *
+ * A simple solution to this is simply to call destroy() on the layer.
+ * the default OpenLayers.Layer class's destroy() function
+ * automatically takes care to remove itself from whatever map it has
+ * been attached to.
+ *
+ * The correct solution is for the layer itself to register an
+ * event-handler on "removelayer" and when it is called, if it
+ * recognizes itself as the layer being removed, then it cycles through
+ * its own personal list of popups, removing them from the map.
+ *
+ * Parameters:
+ * layer - {<OpenLayers.Layer>}
+ * setNewBaseLayer - {Boolean} Default is true
+ */
+ removeLayer: function(layer, setNewBaseLayer) {
+ if (this.events.triggerEvent("preremovelayer", {layer: layer}) === false) {
+ return;
+ }
+ if (setNewBaseLayer == null) {
+ setNewBaseLayer = true;
+ }
+
+ if (layer.isFixed) {
+ this.viewPortDiv.removeChild(layer.div);
+ } else {
+ this.layerContainerDiv.removeChild(layer.div);
+ }
+ OpenLayers.Util.removeItem(this.layers, layer);
+ layer.removeMap(this);
+ layer.map = null;
+
+ // if we removed the base layer, need to set a new one
+ if(this.baseLayer == layer) {
+ this.baseLayer = null;
+ if(setNewBaseLayer) {
+ for(var i=0, len=this.layers.length; i<len; i++) {
+ var iLayer = this.layers[i];
+ if (iLayer.isBaseLayer || this.allOverlays) {
+ this.setBaseLayer(iLayer);
+ break;
+ }
+ }
+ }
+ }
+
+ this.resetLayersZIndex();
+
+ this.events.triggerEvent("removelayer", {layer: layer});
+ layer.events.triggerEvent("removed", {map: this, layer: layer});
+ },
+
+ /**
+ * APIMethod: getNumLayers
+ *
+ * Returns:
+ * {Int} The number of layers attached to the map.
+ */
+ getNumLayers: function () {
+ return this.layers.length;
+ },
+
+ /**
+ * APIMethod: getLayerIndex
+ *
+ * Parameters:
+ * layer - {<OpenLayers.Layer>}
+ *
+ * Returns:
+ * {Integer} The current (zero-based) index of the given layer in the map's
+ * layer stack. Returns -1 if the layer isn't on the map.
+ */
+ getLayerIndex: function (layer) {
+ return OpenLayers.Util.indexOf(this.layers, layer);
+ },
+
+ /**
+ * APIMethod: setLayerIndex
+ * Move the given layer to the specified (zero-based) index in the layer
+ * list, changing its z-index in the map display. Use
+ * map.getLayerIndex() to find out the current index of a layer. Note
+ * that this cannot (or at least should not) be effectively used to
+ * raise base layers above overlays.
+ *
+ * Parameters:
+ * layer - {<OpenLayers.Layer>}
+ * idx - {int}
+ */
+ setLayerIndex: function (layer, idx) {
+ var base = this.getLayerIndex(layer);
+ if (idx < 0) {
+ idx = 0;
+ } else if (idx > this.layers.length) {
+ idx = this.layers.length;
+ }
+ if (base != idx) {
+ this.layers.splice(base, 1);
+ this.layers.splice(idx, 0, layer);
+ for (var i=0, len=this.layers.length; i<len; i++) {
+ this.setLayerZIndex(this.layers[i], i);
+ }
+ this.events.triggerEvent("changelayer", {
+ layer: layer, property: "order"
+ });
+ if(this.allOverlays) {
+ if(idx === 0) {
+ this.setBaseLayer(layer);
+ } else if(this.baseLayer !== this.layers[0]) {
+ this.setBaseLayer(this.layers[0]);
+ }
+ }
+ }
+ },
+
+ /**
+ * APIMethod: raiseLayer
+ * Change the index of the given layer by delta. If delta is positive,
+ * the layer is moved up the map's layer stack; if delta is negative,
+ * the layer is moved down. Again, note that this cannot (or at least
+ * should not) be effectively used to raise base layers above overlays.
+ *
+ * Paremeters:
+ * layer - {<OpenLayers.Layer>}
+ * delta - {int}
+ */
+ raiseLayer: function (layer, delta) {
+ var idx = this.getLayerIndex(layer) + delta;
+ this.setLayerIndex(layer, idx);
+ },
+
+ /**
+ * APIMethod: setBaseLayer
+ * Allows user to specify one of the currently-loaded layers as the Map's
+ * new base layer.
+ *
+ * Parameters:
+ * newBaseLayer - {<OpenLayers.Layer>}
+ */
+ setBaseLayer: function(newBaseLayer) {
+
+ if (newBaseLayer != this.baseLayer) {
+
+ // ensure newBaseLayer is already loaded
+ if (OpenLayers.Util.indexOf(this.layers, newBaseLayer) != -1) {
+
+ // preserve center and scale when changing base layers
+ var center = this.getCachedCenter();
+ var newResolution = OpenLayers.Util.getResolutionFromScale(
+ this.getScale(), newBaseLayer.units
+ );
+
+ // make the old base layer invisible
+ if (this.baseLayer != null && !this.allOverlays) {
+ this.baseLayer.setVisibility(false);
+ }
+
+ // set new baselayer
+ this.baseLayer = newBaseLayer;
+
+ if(!this.allOverlays || this.baseLayer.visibility) {
+ this.baseLayer.setVisibility(true);
+ // Layer may previously have been visible but not in range.
+ // In this case we need to redraw it to make it visible.
+ if (this.baseLayer.inRange === false) {
+ this.baseLayer.redraw();
+ }
+ }
+
+ // recenter the map
+ if (center != null) {
+ // new zoom level derived from old scale
+ var newZoom = this.getZoomForResolution(
+ newResolution || this.resolution, true
+ );
+ // zoom and force zoom change
+ this.setCenter(center, newZoom, false, true);
+ }
+
+ this.events.triggerEvent("changebaselayer", {
+ layer: this.baseLayer
+ });
+ }
+ }
+ },
+
+
+ /********************************************************/
+ /* */
+ /* Control Functions */
+ /* */
+ /* The following functions deal with adding and */
+ /* removing Controls to and from the Map */
+ /* */
+ /********************************************************/
+
+ /**
+ * APIMethod: addControl
+ * Add the passed over control to the map. Optionally
+ * position the control at the given pixel.
+ *
+ * Parameters:
+ * control - {<OpenLayers.Control>}
+ * px - {<OpenLayers.Pixel>}
+ */
+ addControl: function (control, px) {
+ this.controls.push(control);
+ this.addControlToMap(control, px);
+ },
+
+ /**
+ * APIMethod: addControls
+ * Add all of the passed over controls to the map.
+ * You can pass over an optional second array
+ * with pixel-objects to position the controls.
+ * The indices of the two arrays should match and
+ * you can add null as pixel for those controls
+ * you want to be autopositioned.
+ *
+ * Parameters:
+ * controls - {Array(<OpenLayers.Control>)}
+ * pixels - {Array(<OpenLayers.Pixel>)}
+ */
+ addControls: function (controls, pixels) {
+ var pxs = (arguments.length === 1) ? [] : pixels;
+ for (var i=0, len=controls.length; i<len; i++) {
+ var ctrl = controls[i];
+ var px = (pxs[i]) ? pxs[i] : null;
+ this.addControl( ctrl, px );
+ }
+ },
+
+ /**
+ * Method: addControlToMap
+ *
+ * Parameters:
+ *
+ * control - {<OpenLayers.Control>}
+ * px - {<OpenLayers.Pixel>}
+ */
+ addControlToMap: function (control, px) {
+ // If a control doesn't have a div at this point, it belongs in the
+ // viewport.
+ control.outsideViewport = (control.div != null);
+
+ // If the map has a displayProjection, and the control doesn't, set
+ // the display projection.
+ if (this.displayProjection && !control.displayProjection) {
+ control.displayProjection = this.displayProjection;
+ }
+
+ control.setMap(this);
+ var div = control.draw(px);
+ if (div) {
+ if(!control.outsideViewport) {
+ div.style.zIndex = this.Z_INDEX_BASE['Control'] +
+ this.controls.length;
+ this.viewPortDiv.appendChild( div );
+ }
+ }
+ if(control.autoActivate) {
+ control.activate();
+ }
+ },
+
+ /**
+ * APIMethod: getControl
+ *
+ * Parameters:
+ * id - {String} ID of the control to return.
+ *
+ * Returns:
+ * {<OpenLayers.Control>} The control from the map's list of controls
+ * which has a matching 'id'. If none found,
+ * returns null.
+ */
+ getControl: function (id) {
+ var returnControl = null;
+ for(var i=0, len=this.controls.length; i<len; i++) {
+ var control = this.controls[i];
+ if (control.id == id) {
+ returnControl = control;
+ break;
+ }
+ }
+ return returnControl;
+ },
+
+ /**
+ * APIMethod: removeControl
+ * Remove a control from the map. Removes the control both from the map
+ * object's internal array of controls, as well as from the map's
+ * viewPort (assuming the control was not added outsideViewport)
+ *
+ * Parameters:
+ * control - {<OpenLayers.Control>} The control to remove.
+ */
+ removeControl: function (control) {
+ //make sure control is non-null and actually part of our map
+ if ( (control) && (control == this.getControl(control.id)) ) {
+ if (control.div && (control.div.parentNode == this.viewPortDiv)) {
+ this.viewPortDiv.removeChild(control.div);
+ }
+ OpenLayers.Util.removeItem(this.controls, control);
+ }
+ },
+
+ /********************************************************/
+ /* */
+ /* Popup Functions */
+ /* */
+ /* The following functions deal with adding and */
+ /* removing Popups to and from the Map */
+ /* */
+ /********************************************************/
+
+ /**
+ * APIMethod: addPopup
+ *
+ * Parameters:
+ * popup - {<OpenLayers.Popup>}
+ * exclusive - {Boolean} If true, closes all other popups first
+ */
+ addPopup: function(popup, exclusive) {
+
+ if (exclusive) {
+ //remove all other popups from screen
+ for (var i = this.popups.length - 1; i >= 0; --i) {
+ this.removePopup(this.popups[i]);
+ }
+ }
+
+ popup.map = this;
+ this.popups.push(popup);
+ var popupDiv = popup.draw();
+ if (popupDiv) {
+ popupDiv.style.zIndex = this.Z_INDEX_BASE['Popup'] +
+ this.popups.length;
+ this.layerContainerDiv.appendChild(popupDiv);
+ }
+ },
+
+ /**
+ * APIMethod: removePopup
+ *
+ * Parameters:
+ * popup - {<OpenLayers.Popup>}
+ */
+ removePopup: function(popup) {
+ OpenLayers.Util.removeItem(this.popups, popup);
+ if (popup.div) {
+ try { this.layerContainerDiv.removeChild(popup.div); }
+ catch (e) { } // Popups sometimes apparently get disconnected
+ // from the layerContainerDiv, and cause complaints.
+ }
+ popup.map = null;
+ },
+
+ /********************************************************/
+ /* */
+ /* Container Div Functions */
+ /* */
+ /* The following functions deal with the access to */
+ /* and maintenance of the size of the container div */
+ /* */
+ /********************************************************/
+
+ /**
+ * APIMethod: getSize
+ *
+ * Returns:
+ * {<OpenLayers.Size>} An <OpenLayers.Size> object that represents the
+ * size, in pixels, of the div into which OpenLayers
+ * has been loaded.
+ * Note - A clone() of this locally cached variable is
+ * returned, so as not to allow users to modify it.
+ */
+ getSize: function () {
+ var size = null;
+ if (this.size != null) {
+ size = this.size.clone();
+ }
+ return size;
+ },
+
+ /**
+ * APIMethod: updateSize
+ * This function should be called by any external code which dynamically
+ * changes the size of the map div (because mozilla wont let us catch
+ * the "onresize" for an element)
+ */
+ updateSize: function() {
+ // the div might have moved on the page, also
+ var newSize = this.getCurrentSize();
+ if (newSize && !isNaN(newSize.h) && !isNaN(newSize.w)) {
+ this.events.clearMouseCache();
+ var oldSize = this.getSize();
+ if (oldSize == null) {
+ this.size = oldSize = newSize;
+ }
+ if (!newSize.equals(oldSize)) {
+
+ // store the new size
+ this.size = newSize;
+
+ //notify layers of mapresize
+ for(var i=0, len=this.layers.length; i<len; i++) {
+ this.layers[i].onMapResize();
+ }
+
+ var center = this.getCachedCenter();
+
+ if (this.baseLayer != null && center != null) {
+ var zoom = this.getZoom();
+ this.zoom = null;
+ this.setCenter(center, zoom);
+ }
+
+ }
+ }
+ this.events.triggerEvent("updatesize");
+ },
+
+ /**
+ * Method: getCurrentSize
+ *
+ * Returns:
+ * {<OpenLayers.Size>} A new <OpenLayers.Size> object with the dimensions
+ * of the map div
+ */
+ getCurrentSize: function() {
+
+ var size = new OpenLayers.Size(this.div.clientWidth,
+ this.div.clientHeight);
+
+ if (size.w == 0 && size.h == 0 || isNaN(size.w) && isNaN(size.h)) {
+ size.w = this.div.offsetWidth;
+ size.h = this.div.offsetHeight;
+ }
+ if (size.w == 0 && size.h == 0 || isNaN(size.w) && isNaN(size.h)) {
+ size.w = parseInt(this.div.style.width);
+ size.h = parseInt(this.div.style.height);
+ }
+ return size;
+ },
+
+ /**
+ * Method: calculateBounds
+ *
+ * Parameters:
+ * center - {<OpenLayers.LonLat>} Default is this.getCenter()
+ * resolution - {float} Default is this.getResolution()
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} A bounds based on resolution, center, and
+ * current mapsize.
+ */
+ calculateBounds: function(center, resolution) {
+
+ var extent = null;
+
+ if (center == null) {
+ center = this.getCachedCenter();
+ }
+ if (resolution == null) {
+ resolution = this.getResolution();
+ }
+
+ if ((center != null) && (resolution != null)) {
+ var halfWDeg = (this.size.w * resolution) / 2;
+ var halfHDeg = (this.size.h * resolution) / 2;
+
+ extent = new OpenLayers.Bounds(center.lon - halfWDeg,
+ center.lat - halfHDeg,
+ center.lon + halfWDeg,
+ center.lat + halfHDeg);
+ }
+
+ return extent;
+ },
+
+
+ /********************************************************/
+ /* */
+ /* Zoom, Center, Pan Functions */
+ /* */
+ /* The following functions handle the validation, */
+ /* getting and setting of the Zoom Level and Center */
+ /* as well as the panning of the Map */
+ /* */
+ /********************************************************/
+ /**
+ * APIMethod: getCenter
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>}
+ */
+ getCenter: function () {
+ var center = null;
+ var cachedCenter = this.getCachedCenter();
+ if (cachedCenter) {
+ center = cachedCenter.clone();
+ }
+ return center;
+ },
+
+ /**
+ * Method: getCachedCenter
+ *
+ * Returns:
+ * {<OpenLayers.LonLat>}
+ */
+ getCachedCenter: function() {
+ if (!this.center && this.size) {
+ this.center = this.getLonLatFromViewPortPx({
+ x: this.size.w / 2,
+ y: this.size.h / 2
+ });
+ }
+ return this.center;
+ },
+
+ /**
+ * APIMethod: getZoom
+ *
+ * Returns:
+ * {Integer}
+ */
+ getZoom: function () {
+ return this.zoom;
+ },
+
+ /**
+ * APIMethod: pan
+ * Allows user to pan by a value of screen pixels
+ *
+ * Parameters:
+ * dx - {Integer}
+ * dy - {Integer}
+ * options - {Object} Options to configure panning:
+ * - *animate* {Boolean} Use panTo instead of setCenter. Default is true.
+ * - *dragging* {Boolean} Call setCenter with dragging true. Default is
+ * false.
+ */
+ pan: function(dx, dy, options) {
+ options = OpenLayers.Util.applyDefaults(options, {
+ animate: true,
+ dragging: false
+ });
+ if (options.dragging) {
+ if (dx != 0 || dy != 0) {
+ this.moveByPx(dx, dy);
+ }
+ } else {
+ // getCenter
+ var centerPx = this.getViewPortPxFromLonLat(this.getCachedCenter());
+
+ // adjust
+ var newCenterPx = centerPx.add(dx, dy);
+
+ if (this.dragging || !newCenterPx.equals(centerPx)) {
+ var newCenterLonLat = this.getLonLatFromViewPortPx(newCenterPx);
+ if (options.animate) {
+ this.panTo(newCenterLonLat);
+ } else {
+ this.moveTo(newCenterLonLat);
+ if(this.dragging) {
+ this.dragging = false;
+ this.events.triggerEvent("moveend");
+ }
+ }
+ }
+ }
+
+ },
+
+ /**
+ * APIMethod: panTo
+ * Allows user to pan to a new lonlat
+ * If the new lonlat is in the current extent the map will slide smoothly
+ *
+ * Parameters:
+ * lonlat - {<OpenLayers.LonLat>}
+ */
+ panTo: function(lonlat) {
+ if (this.panTween && this.getExtent().scale(this.panRatio).containsLonLat(lonlat)) {
+ var center = this.getCachedCenter();
+
+ // center will not change, don't do nothing
+ if (lonlat.equals(center)) {
+ return;
+ }
+
+ var from = this.getPixelFromLonLat(center);
+ var to = this.getPixelFromLonLat(lonlat);
+ var vector = { x: to.x - from.x, y: to.y - from.y };
+ var last = { x: 0, y: 0 };
+
+ this.panTween.start( { x: 0, y: 0 }, vector, this.panDuration, {
+ callbacks: {
+ eachStep: OpenLayers.Function.bind(function(px) {
+ var x = px.x - last.x,
+ y = px.y - last.y;
+ this.moveByPx(x, y);
+ last.x = Math.round(px.x);
+ last.y = Math.round(px.y);
+ }, this),
+ done: OpenLayers.Function.bind(function(px) {
+ this.moveTo(lonlat);
+ this.dragging = false;
+ this.events.triggerEvent("moveend");
+ }, this)
+ }
+ });
+ } else {
+ this.setCenter(lonlat);
+ }
+ },
+
+ /**
+ * APIMethod: setCenter
+ * Set the map center (and optionally, the zoom level).
+ *
+ * Parameters:
+ * lonlat - {<OpenLayers.LonLat>|Array} The new center location.
+ * If provided as array, the first value is the x coordinate,
+ * and the 2nd value is the y coordinate.
+ * zoom - {Integer} Optional zoom level.
+ * dragging - {Boolean} Specifies whether or not to trigger
+ * movestart/end events
+ * forceZoomChange - {Boolean} Specifies whether or not to trigger zoom
+ * change events (needed on baseLayer change)
+ *
+ * TBD: reconsider forceZoomChange in 3.0
+ */
+ setCenter: function(lonlat, zoom, dragging, forceZoomChange) {
+ if (this.panTween) {
+ this.panTween.stop();
+ }
+ if (this.zoomTween) {
+ this.zoomTween.stop();
+ }
+ this.moveTo(lonlat, zoom, {
+ 'dragging': dragging,
+ 'forceZoomChange': forceZoomChange
+ });
+ },
+
+ /**
+ * Method: moveByPx
+ * Drag the map by pixels.
+ *
+ * Parameters:
+ * dx - {Number}
+ * dy - {Number}
+ */
+ moveByPx: function(dx, dy) {
+ var hw = this.size.w / 2;
+ var hh = this.size.h / 2;
+ var x = hw + dx;
+ var y = hh + dy;
+ var wrapDateLine = this.baseLayer.wrapDateLine;
+ var xRestriction = 0;
+ var yRestriction = 0;
+ if (this.restrictedExtent) {
+ xRestriction = hw;
+ yRestriction = hh;
+ // wrapping the date line makes no sense for restricted extents
+ wrapDateLine = false;
+ }
+ dx = wrapDateLine ||
+ x <= this.maxPx.x - xRestriction &&
+ x >= this.minPx.x + xRestriction ? Math.round(dx) : 0;
+ dy = y <= this.maxPx.y - yRestriction &&
+ y >= this.minPx.y + yRestriction ? Math.round(dy) : 0;
+ if (dx || dy) {
+ if (!this.dragging) {
+ this.dragging = true;
+ this.events.triggerEvent("movestart");
+ }
+ this.center = null;
+ if (dx) {
+ this.layerContainerOriginPx.x -= dx;
+ this.minPx.x -= dx;
+ this.maxPx.x -= dx;
+ }
+ if (dy) {
+ this.layerContainerOriginPx.y -= dy;
+ this.minPx.y -= dy;
+ this.maxPx.y -= dy;
+ }
+ this.applyTransform();
+ var layer, i, len;
+ for (i=0, len=this.layers.length; i<len; ++i) {
+ layer = this.layers[i];
+ if (layer.visibility &&
+ (layer === this.baseLayer || layer.inRange)) {
+ layer.moveByPx(dx, dy);
+ layer.events.triggerEvent("move");
+ }
+ }
+ this.events.triggerEvent("move");
+ }
+ },
+
+ /**
+ * Method: adjustZoom
+ *
+ * Parameters:
+ * zoom - {Number} The zoom level to adjust
+ *
+ * Returns:
+ * {Integer} Adjusted zoom level that shows a map not wider than its
+ * <baseLayer>'s maxExtent.
+ */
+ adjustZoom: function(zoom) {
+ if (this.baseLayer && this.baseLayer.wrapDateLine) {
+ var resolution, resolutions = this.baseLayer.resolutions,
+ maxResolution = this.getMaxExtent().getWidth() / this.size.w;
+ if (this.getResolutionForZoom(zoom) > maxResolution) {
+ if (this.fractionalZoom) {
+ zoom = this.getZoomForResolution(maxResolution);
+ } else {
+ for (var i=zoom|0, ii=resolutions.length; i<ii; ++i) {
+ if (resolutions[i] <= maxResolution) {
+ zoom = i;
+ break;
+ }
+ }
+ }
+ }
+ }
+ return zoom;
+ },
+
+ /**
+ * APIMethod: getMinZoom
+ * Returns the minimum zoom level for the current map view. If the base
+ * layer is configured with <wrapDateLine> set to true, this will be the
+ * first zoom level that shows no more than one world width in the current
+ * map viewport. Components that rely on this value (e.g. zoom sliders)
+ * should also listen to the map's "updatesize" event and call this method
+ * in the "updatesize" listener.
+ *
+ * Returns:
+ * {Number} Minimum zoom level that shows a map not wider than its
+ * <baseLayer>'s maxExtent. This is an Integer value, unless the map is
+ * configured with <fractionalZoom> set to true.
+ */
+ getMinZoom: function() {
+ return this.adjustZoom(0);
+ },
+
+ /**
+ * Method: moveTo
+ *
+ * Parameters:
+ * lonlat - {<OpenLayers.LonLat>}
+ * zoom - {Integer}
+ * options - {Object}
+ */
+ moveTo: function(lonlat, zoom, options) {
+ if (lonlat != null && !(lonlat instanceof OpenLayers.LonLat)) {
+ lonlat = new OpenLayers.LonLat(lonlat);
+ }
+ if (!options) {
+ options = {};
+ }
+ if (zoom != null) {
+ zoom = parseFloat(zoom);
+ if (!this.fractionalZoom) {
+ zoom = Math.round(zoom);
+ }
+ }
+ var requestedZoom = zoom;
+ zoom = this.adjustZoom(zoom);
+ if (zoom !== requestedZoom) {
+ // zoom was adjusted, so keep old lonlat to avoid panning
+ lonlat = this.getCenter();
+ }
+ // dragging is false by default
+ var dragging = options.dragging || this.dragging;
+ // forceZoomChange is false by default
+ var forceZoomChange = options.forceZoomChange;
+
+ if (!this.getCachedCenter() && !this.isValidLonLat(lonlat)) {
+ lonlat = this.maxExtent.getCenterLonLat();
+ this.center = lonlat.clone();
+ }
+
+ if(this.restrictedExtent != null) {
+ // In 3.0, decide if we want to change interpretation of maxExtent.
+ if(lonlat == null) {
+ lonlat = this.center;
+ }
+ if(zoom == null) {
+ zoom = this.getZoom();
+ }
+ var resolution = this.getResolutionForZoom(zoom);
+ var extent = this.calculateBounds(lonlat, resolution);
+ if(!this.restrictedExtent.containsBounds(extent)) {
+ var maxCenter = this.restrictedExtent.getCenterLonLat();
+ if(extent.getWidth() > this.restrictedExtent.getWidth()) {
+ lonlat = new OpenLayers.LonLat(maxCenter.lon, lonlat.lat);
+ } else if(extent.left < this.restrictedExtent.left) {
+ lonlat = lonlat.add(this.restrictedExtent.left -
+ extent.left, 0);
+ } else if(extent.right > this.restrictedExtent.right) {
+ lonlat = lonlat.add(this.restrictedExtent.right -
+ extent.right, 0);
+ }
+ if(extent.getHeight() > this.restrictedExtent.getHeight()) {
+ lonlat = new OpenLayers.LonLat(lonlat.lon, maxCenter.lat);
+ } else if(extent.bottom < this.restrictedExtent.bottom) {
+ lonlat = lonlat.add(0, this.restrictedExtent.bottom -
+ extent.bottom);
+ }
+ else if(extent.top > this.restrictedExtent.top) {
+ lonlat = lonlat.add(0, this.restrictedExtent.top -
+ extent.top);
+ }
+ }
+ }
+
+ var zoomChanged = forceZoomChange || (
+ (this.isValidZoomLevel(zoom)) &&
+ (zoom != this.getZoom()) );
+
+ var centerChanged = (this.isValidLonLat(lonlat)) &&
+ (!lonlat.equals(this.center));
+
+ // if neither center nor zoom will change, no need to do anything
+ if (zoomChanged || centerChanged || dragging) {
+ dragging || this.events.triggerEvent("movestart", {
+ zoomChanged: zoomChanged
+ });
+
+ if (centerChanged) {
+ if (!zoomChanged && this.center) {
+ // if zoom hasnt changed, just slide layerContainer
+ // (must be done before setting this.center to new value)
+ this.centerLayerContainer(lonlat);
+ }
+ this.center = lonlat.clone();
+ }
+
+ var res = zoomChanged ?
+ this.getResolutionForZoom(zoom) : this.getResolution();
+ // (re)set the layerContainerDiv's location
+ if (zoomChanged || this.layerContainerOrigin == null) {
+ this.layerContainerOrigin = this.getCachedCenter();
+ this.layerContainerOriginPx.x = 0;
+ this.layerContainerOriginPx.y = 0;
+ this.applyTransform();
+ var maxExtent = this.getMaxExtent({restricted: true});
+ var maxExtentCenter = maxExtent.getCenterLonLat();
+ var lonDelta = this.center.lon - maxExtentCenter.lon;
+ var latDelta = maxExtentCenter.lat - this.center.lat;
+ var extentWidth = Math.round(maxExtent.getWidth() / res);
+ var extentHeight = Math.round(maxExtent.getHeight() / res);
+ this.minPx = {
+ x: (this.size.w - extentWidth) / 2 - lonDelta / res,
+ y: (this.size.h - extentHeight) / 2 - latDelta / res
+ };
+ this.maxPx = {
+ x: this.minPx.x + Math.round(maxExtent.getWidth() / res),
+ y: this.minPx.y + Math.round(maxExtent.getHeight() / res)
+ };
+ }
+
+ if (zoomChanged) {
+ this.zoom = zoom;
+ this.resolution = res;
+ }
+
+ var bounds = this.getExtent();
+
+ //send the move call to the baselayer and all the overlays
+
+ if(this.baseLayer.visibility) {
+ this.baseLayer.moveTo(bounds, zoomChanged, options.dragging);
+ options.dragging || this.baseLayer.events.triggerEvent(
+ "moveend", {zoomChanged: zoomChanged}
+ );
+ }
+
+ bounds = this.baseLayer.getExtent();
+
+ for (var i=this.layers.length-1; i>=0; --i) {
+ var layer = this.layers[i];
+ if (layer !== this.baseLayer && !layer.isBaseLayer) {
+ var inRange = layer.calculateInRange();
+ if (layer.inRange != inRange) {
+ // the inRange property has changed. If the layer is
+ // no longer in range, we turn it off right away. If
+ // the layer is no longer out of range, the moveTo
+ // call below will turn on the layer.
+ layer.inRange = inRange;
+ if (!inRange) {
+ layer.display(false);
+ }
+ this.events.triggerEvent("changelayer", {
+ layer: layer, property: "visibility"
+ });
+ }
+ if (inRange && layer.visibility) {
+ layer.moveTo(bounds, zoomChanged, options.dragging);
+ options.dragging || layer.events.triggerEvent(
+ "moveend", {zoomChanged: zoomChanged}
+ );
+ }
+ }
+ }
+
+ this.events.triggerEvent("move");
+ dragging || this.events.triggerEvent("moveend");
+
+ if (zoomChanged) {
+ //redraw popups
+ for (var i=0, len=this.popups.length; i<len; i++) {
+ this.popups[i].updatePosition();
+ }
+ this.events.triggerEvent("zoomend");
+ }
+ }
+ },
+
+ /**
+ * Method: centerLayerContainer
+ * This function takes care to recenter the layerContainerDiv.
+ *
+ * Parameters:
+ * lonlat - {<OpenLayers.LonLat>}
+ */
+ centerLayerContainer: function (lonlat) {
+ var originPx = this.getViewPortPxFromLonLat(this.layerContainerOrigin);
+ var newPx = this.getViewPortPxFromLonLat(lonlat);
+
+ if ((originPx != null) && (newPx != null)) {
+ var oldLeft = this.layerContainerOriginPx.x;
+ var oldTop = this.layerContainerOriginPx.y;
+ var newLeft = Math.round(originPx.x - newPx.x);
+ var newTop = Math.round(originPx.y - newPx.y);
+ this.applyTransform(
+ (this.layerContainerOriginPx.x = newLeft),
+ (this.layerContainerOriginPx.y = newTop));
+ var dx = oldLeft - newLeft;
+ var dy = oldTop - newTop;
+ this.minPx.x -= dx;
+ this.maxPx.x -= dx;
+ this.minPx.y -= dy;
+ this.maxPx.y -= dy;
+ }
+ },
+
+ /**
+ * Method: isValidZoomLevel
+ *
+ * Parameters:
+ * zoomLevel - {Integer}
+ *
+ * Returns:
+ * {Boolean} Whether or not the zoom level passed in is non-null and
+ * within the min/max range of zoom levels.
+ */
+ isValidZoomLevel: function(zoomLevel) {
+ return ( (zoomLevel != null) &&
+ (zoomLevel >= 0) &&
+ (zoomLevel < this.getNumZoomLevels()) );
+ },
+
+ /**
+ * Method: isValidLonLat
+ *
+ * Parameters:
+ * lonlat - {<OpenLayers.LonLat>}
+ *
+ * Returns:
+ * {Boolean} Whether or not the lonlat passed in is non-null and within
+ * the maxExtent bounds
+ */
+ isValidLonLat: function(lonlat) {
+ var valid = false;
+ if (lonlat != null) {
+ var maxExtent = this.getMaxExtent();
+ var worldBounds = this.baseLayer.wrapDateLine && maxExtent;
+ valid = maxExtent.containsLonLat(lonlat, {worldBounds: worldBounds});
+ }
+ return valid;
+ },
+
+ /********************************************************/
+ /* */
+ /* Layer Options */
+ /* */
+ /* Accessor functions to Layer Options parameters */
+ /* */
+ /********************************************************/
+
+ /**
+ * APIMethod: getProjection
+ * This method returns a string representing the projection. In
+ * the case of projection support, this will be the srsCode which
+ * is loaded -- otherwise it will simply be the string value that
+ * was passed to the projection at startup.
+ *
+ * FIXME: In 3.0, we will remove getProjectionObject, and instead
+ * return a Projection object from this function.
+ *
+ * Returns:
+ * {String} The Projection string from the base layer or null.
+ */
+ getProjection: function() {
+ var projection = this.getProjectionObject();
+ return projection ? projection.getCode() : null;
+ },
+
+ /**
+ * APIMethod: getProjectionObject
+ * Returns the projection obect from the baselayer.
+ *
+ * Returns:
+ * {<OpenLayers.Projection>} The Projection of the base layer.
+ */
+ getProjectionObject: function() {
+ var projection = null;
+ if (this.baseLayer != null) {
+ projection = this.baseLayer.projection;
+ }
+ return projection;
+ },
+
+ /**
+ * APIMethod: getMaxResolution
+ *
+ * Returns:
+ * {String} The Map's Maximum Resolution
+ */
+ getMaxResolution: function() {
+ var maxResolution = null;
+ if (this.baseLayer != null) {
+ maxResolution = this.baseLayer.maxResolution;
+ }
+ return maxResolution;
+ },
+
+ /**
+ * APIMethod: getMaxExtent
+ *
+ * Parameters:
+ * options - {Object}
+ *
+ * Allowed Options:
+ * restricted - {Boolean} If true, returns restricted extent (if it is
+ * available.)
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} The maxExtent property as set on the current
+ * baselayer, unless the 'restricted' option is set, in which case
+ * the 'restrictedExtent' option from the map is returned (if it
+ * is set).
+ */
+ getMaxExtent: function (options) {
+ var maxExtent = null;
+ if(options && options.restricted && this.restrictedExtent){
+ maxExtent = this.restrictedExtent;
+ } else if (this.baseLayer != null) {
+ maxExtent = this.baseLayer.maxExtent;
+ }
+ return maxExtent;
+ },
+
+ /**
+ * APIMethod: getNumZoomLevels
+ *
+ * Returns:
+ * {Integer} The total number of zoom levels that can be displayed by the
+ * current baseLayer.
+ */
+ getNumZoomLevels: function() {
+ var numZoomLevels = null;
+ if (this.baseLayer != null) {
+ numZoomLevels = this.baseLayer.numZoomLevels;
+ }
+ return numZoomLevels;
+ },
+
+ /********************************************************/
+ /* */
+ /* Baselayer Functions */
+ /* */
+ /* The following functions, all publicly exposed */
+ /* in the API?, are all merely wrappers to the */
+ /* the same calls on whatever layer is set as */
+ /* the current base layer */
+ /* */
+ /********************************************************/
+
+ /**
+ * APIMethod: getExtent
+ *
+ * Returns:
+ * {<OpenLayers.Bounds>} A Bounds object which represents the lon/lat
+ * bounds of the current viewPort.
+ * If no baselayer is set, returns null.
+ */
+ getExtent: function () {
+ var extent = null;
+ if (this.baseLayer != null) {
+ extent = this.baseLayer.getExtent();
+ }
+ return extent;
+ },
+
+ /**
+ * APIMethod: getResolution
+ *
+ * Returns:
+ * {Float} The current resolution of the map.
+ * If no baselayer is set, returns null.
+ */
+ getResolution: function () {
+ var resolution = null;
+ if (this.baseLayer != null) {
+ resolution = this.baseLayer.getResolution();
+ } else if(this.allOverlays === true && this.layers.length > 0) {
+ // while adding the 1st layer to the map in allOverlays mode,
+ // this.baseLayer is not set yet when we need the resolution
+ // for calculateInRange.
+ resolution = this.layers[0].getResolution();
+ }
+ return resolution;
+ },
+
+ /**
+ * APIMethod: getUnits
+ *
+ * Returns:
+ * {Float} The current units of the map.
+ * If no baselayer is set, returns null.
+ */
+ getUnits: function () {
+ var units = null;
+ if (this.baseLayer != null) {
+ units = this.baseLayer.units;
+ }
+ return units;
+ },
+
+ /**
+ * APIMethod: getScale
+ *
+ * Returns:
+ * {Float} The current scale denominator of the map.
+ * If no baselayer is set, returns null.
+ */
+ getScale: function () {
+ var scale = null;
+ if (this.baseLayer != null) {
+ var res = this.getResolution();
+ var units = this.baseLayer.units;
+ scale = OpenLayers.Util.getScaleFromResolution(res, units);
+ }
+ return scale;
+ },
+
+
+ /**
+ * APIMethod: getZoomForExtent
+ *
+ * Parameters:
+ * bounds - {<OpenLayers.Bounds>}
+ * closest - {Boolean} Find the zoom level that most closely fits the
+ * specified bounds. Note that this may result in a zoom that does
+ * not exactly contain the entire extent.
+ * Default is false.
+ *
+ * Returns:
+ * {Integer} A suitable zoom level for the specified bounds.
+ * If no baselayer is set, returns null.
+ */
+ getZoomForExtent: function (bounds, closest) {
+ var zoom = null;
+ if (this.baseLayer != null) {
+ zoom = this.baseLayer.getZoomForExtent(bounds, closest);
+ }
+ return zoom;
+ },
+
+ /**
+ * APIMethod: getResolutionForZoom
+ *
+ * Parameters:
+ * zoom - {Float}
+ *
+ * Returns:
+ * {Float} A suitable resolution for the specified zoom. If no baselayer
+ * is set, returns null.
+ */
+ getResolutionForZoom: function(zoom) {
+ var resolution = null;
+ if(this.baseLayer) {
+ resolution = this.baseLayer.getResolutionForZoom(zoom);
+ }
+ return resolution;
+ },
+
+ /**
+ * APIMethod: getZoomForResolution
+ *
+ * Parameters:
+ * resolution - {Float}
+ * closest - {Boolean} Find the zoom level that corresponds to the absolute
+ * closest resolution, which may result in a zoom whose corresponding
+ * resolution is actually smaller than we would have desired (if this
+ * is being called from a getZoomForExtent() call, then this means that
+ * the returned zoom index might not actually contain the entire
+ * extent specified... but it'll be close).
+ * Default is false.
+ *
+ * Returns:
+ * {Integer} A suitable zoom level for the specified resolution.
+ * If no baselayer is set, returns null.
+ */
+ getZoomForResolution: function(resolution, closest) {
+ var zoom = null;
+ if (this.baseLayer != null) {
+ zoom = this.baseLayer.getZoomForResolution(resolution, closest);
+ }
+ return zoom;
+ },
+
+ /********************************************************/
+ /* */
+ /* Zooming Functions */
+ /* */
+ /* The following functions, all publicly exposed */
+ /* in the API, are all merely wrappers to the */
+ /* the setCenter() function */
+ /* */
+ /********************************************************/
+
+ /**
+ * APIMethod: zoomTo
+ * Zoom to a specific zoom level. Zooming will be animated unless the map
+ * is configured with {zoomMethod: null}. To zoom without animation, use
+ * <setCenter> without a lonlat argument.
+ *
+ * Parameters:
+ * zoom - {Integer}
+ */
+ zoomTo: function(zoom, xy) {
+ // non-API arguments:
+ // xy - {<OpenLayers.Pixel>} optional zoom origin
+
+ var map = this;
+ if (map.isValidZoomLevel(zoom)) {
+ if (map.baseLayer.wrapDateLine) {
+ zoom = map.adjustZoom(zoom);
+ }
+ if (map.zoomTween) {
+ var currentRes = map.getResolution(),
+ targetRes = map.getResolutionForZoom(zoom),
+ start = {scale: 1},
+ end = {scale: currentRes / targetRes};
+ if (map.zoomTween.playing && map.zoomTween.duration < 3 * map.zoomDuration) {
+ // update the end scale, and reuse the running zoomTween
+ map.zoomTween.finish = {
+ scale: map.zoomTween.finish.scale * end.scale
+ };
+ } else {
+ if (!xy) {
+ var size = map.getSize();
+ xy = {x: size.w / 2, y: size.h / 2};
+ }
+ map.zoomTween.start(start, end, map.zoomDuration, {
+ minFrameRate: 50, // don't spend much time zooming
+ callbacks: {
+ eachStep: function(data) {
+ var containerOrigin = map.layerContainerOriginPx,
+ scale = data.scale,
+ dx = ((scale - 1) * (containerOrigin.x - xy.x)) | 0,
+ dy = ((scale - 1) * (containerOrigin.y - xy.y)) | 0;
+ map.applyTransform(containerOrigin.x + dx, containerOrigin.y + dy, scale);
+ },
+ done: function(data) {
+ map.applyTransform();
+ var resolution = map.getResolution() / data.scale,
+ zoom = map.getZoomForResolution(resolution, true)
+ map.moveTo(map.getZoomTargetCenter(xy, resolution), zoom, true);
+ }
+ }
+ });
+ }
+ } else {
+ var center = xy ?
+ map.getZoomTargetCenter(xy, map.getResolutionForZoom(zoom)) :
+ null;
+ map.setCenter(center, zoom);
+ }
+ }
+ },
+
+ /**
+ * APIMethod: zoomIn
+ *
+ */
+ zoomIn: function() {
+ this.zoomTo(this.getZoom() + 1);
+ },
+
+ /**
+ * APIMethod: zoomOut
+ *
+ */
+ zoomOut: function() {
+ this.zoomTo(this.getZoom() - 1);
+ },
+
+ /**
+ * APIMethod: zoomToExtent
+ * Zoom to the passed in bounds, recenter
+ *
+ * Parameters:
+ * bounds - {<OpenLayers.Bounds>|Array} If provided as an array, the array
+ * should consist of four values (left, bottom, right, top).
+ * closest - {Boolean} Find the zoom level that most closely fits the
+ * specified bounds. Note that this may result in a zoom that does
+ * not exactly contain the entire extent.
+ * Default is false.
+ *
+ */
+ zoomToExtent: function(bounds, closest) {
+ if (!(bounds instanceof OpenLayers.Bounds)) {
+ bounds = new OpenLayers.Bounds(bounds);
+ }
+ var center = bounds.getCenterLonLat();
+ if (this.baseLayer.wrapDateLine) {
+ var maxExtent = this.getMaxExtent();
+
+ //fix straddling bounds (in the case of a bbox that straddles the
+ // dateline, it's left and right boundaries will appear backwards.
+ // we fix this by allowing a right value that is greater than the
+ // max value at the dateline -- this allows us to pass a valid
+ // bounds to calculate zoom)
+ //
+ bounds = bounds.clone();
+ while (bounds.right < bounds.left) {
+ bounds.right += maxExtent.getWidth();
+ }
+ //if the bounds was straddling (see above), then the center point
+ // we got from it was wrong. So we take our new bounds and ask it
+ // for the center.
+ //
+ center = bounds.getCenterLonLat().wrapDateLine(maxExtent);
+ }
+ this.setCenter(center, this.getZoomForExtent(bounds, closest));
+ },
+
+ /**
+ * APIMethod: zoomToMaxExtent
+ * Zoom to the full extent and recenter.
+ *
+ * Parameters:
+ * options - {Object}
+ *
+ * Allowed Options:
+ * restricted - {Boolean} True to zoom to restricted extent if it is
+ * set. Defaults to true.
+ */
+ zoomToMaxExtent: function(options) {
+ //restricted is true by default
+ var restricted = (options) ? options.restricted : true;
+
+ var maxExtent = this.getMaxExtent({
+ 'restricted': restricted
+ });
+ this.zoomToExtent(maxExtent);
+ },
+
+ /**
+ * APIMethod: zoomToScale
+ * Zoom to a specified scale
+ *
+ * Parameters:
+ * scale - {float}
+ * closest - {Boolean} Find the zoom level that most closely fits the
+ * specified scale. Note that this may result in a zoom that does
+ * not exactly contain the entire extent.
+ * Default is false.
+ *
+ */
+ zoomToScale: function(scale, closest) {
+ var res = OpenLayers.Util.getResolutionFromScale(scale,
+ this.baseLayer.units);
+
+ var halfWDeg = (this.size.w * res) / 2;
+ var halfHDeg = (this.size.h * res) / 2;
+ var center = this.getCachedCenter();
+
+ var extent = new OpenLayers.Bounds(center.lon - halfWDeg,
+ &nbs
ToastFreeware / philipp / winterrodeln / mediawiki_extensions / wrmap.git / commitdiff