leaflet-engine/leaflet-src.js

Leaflet is an open-source JavaScript library for mobile-friendly interactive maps.

/*
 Copyright (c) 2010-2012, CloudMade, Vladimir Agafonkin
 Leaflet is an open-source JavaScript library for mobile-friendly interactive maps.
 http://leaflet.cloudmade.com
*/
(function (window, undefined) {

var L, originalL;

if (typeof exports !== undefined + '') {
	L = exports;
} else {
	originalL = window.L;
	L = {};

	L.noConflict = function () {
		window.L = originalL;
		return this;
	};

	window.L = L;
}

L.version = '0.4.5';


/*
 * L.Util is a namespace for various utility functions.
 */

L.Util = {
	extend: function (/*Object*/ dest) /*-> Object*/ {	// merge src properties into dest
		var sources = Array.prototype.slice.call(arguments, 1);
		for (var j = 0, len = sources.length, src; j < len; j++) {
			src = sources[j] || {};
			for (var i in src) {
				if (src.hasOwnProperty(i)) {
					dest[i] = src[i];
				}
			}
		}
		return dest;
	},

	bind: function (fn, obj) { // (Function, Object) -> Function
		var args = arguments.length > 2 ? Array.prototype.slice.call(arguments, 2) : null;
		return function () {
			return fn.apply(obj, args || arguments);
		};
	},

	stamp: (function () {
		var lastId = 0, key = '_leaflet_id';
		return function (/*Object*/ obj) {
			obj[key] = obj[key] || ++lastId;
			return obj[key];
		};
	}()),

	limitExecByInterval: function (fn, time, context) {
		var lock, execOnUnlock;

		return function wrapperFn() {
			var args = arguments;

			if (lock) {
				execOnUnlock = true;
				return;
			}

			lock = true;

			setTimeout(function () {
				lock = false;

				if (execOnUnlock) {
					wrapperFn.apply(context, args);
					execOnUnlock = false;
				}
			}, time);

			fn.apply(context, args);
		};
	},

	falseFn: function () {
		return false;
	},

	formatNum: function (num, digits) {
		var pow = Math.pow(10, digits || 5);
		return Math.round(num * pow) / pow;
	},

	splitWords: function (str) {
		return str.replace(/^\s+|\s+$/g, '').split(/\s+/);
	},

	setOptions: function (obj, options) {
		obj.options = L.Util.extend({}, obj.options, options);
		return obj.options;
	},

	getParamString: function (obj) {
		var params = [];
		for (var i in obj) {
			if (obj.hasOwnProperty(i)) {
				params.push(i + '=' + obj[i]);
			}
		}
		return '?' + params.join('&');
	},

	template: function (str, data) {
		return str.replace(/\{ *([\w_]+) *\}/g, function (str, key) {
			var value = data[key];
			if (!data.hasOwnProperty(key)) {
				throw new Error('No value provided for variable ' + str);
			}
			return value;
		});
	},

	emptyImageUrl: 'data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs='
};

(function () {

	function getPrefixed(name) {
		var i, fn,
			prefixes = ['webkit', 'moz', 'o', 'ms'];

		for (i = 0; i < prefixes.length && !fn; i++) {
			fn = window[prefixes[i] + name];
		}

		return fn;
	}

	function timeoutDefer(fn) {
		return window.setTimeout(fn, 1000 / 60);
	}

	var requestFn = window.requestAnimationFrame ||
			getPrefixed('RequestAnimationFrame') || timeoutDefer;

	var cancelFn = window.cancelAnimationFrame ||
			getPrefixed('CancelAnimationFrame') ||
			getPrefixed('CancelRequestAnimationFrame') ||
			function (id) {
				window.clearTimeout(id);
			};


	L.Util.requestAnimFrame = function (fn, context, immediate, element) {
		fn = L.Util.bind(fn, context);

		if (immediate && requestFn === timeoutDefer) {
			fn();
		} else {
			return requestFn.call(window, fn, element);
		}
	};

	L.Util.cancelAnimFrame = function (id) {
		if (id) {
			cancelFn.call(window, id);
		}
	};

}());


/*
 * Class powers the OOP facilities of the library. Thanks to John Resig and Dean Edwards for inspiration!
 */

L.Class = function () {};

L.Class.extend = function (/*Object*/ props) /*-> Class*/ {

	// extended class with the new prototype
	var NewClass = function () {
		if (this.initialize) {
			this.initialize.apply(this, arguments);
		}
	};

	// instantiate class without calling constructor
	var F = function () {};
	F.prototype = this.prototype;

	var proto = new F();
	proto.constructor = NewClass;

	NewClass.prototype = proto;

	//inherit parent's statics
	for (var i in this) {
		if (this.hasOwnProperty(i) && i !== 'prototype') {
			NewClass[i] = this[i];
		}
	}

	// mix static properties into the class
	if (props.statics) {
		L.Util.extend(NewClass, props.statics);
		delete props.statics;
	}

	// mix includes into the prototype
	if (props.includes) {
		L.Util.extend.apply(null, [proto].concat(props.includes));
		delete props.includes;
	}

	// merge options
	if (props.options && proto.options) {
		props.options = L.Util.extend({}, proto.options, props.options);
	}

	// mix given properties into the prototype
	L.Util.extend(proto, props);

	return NewClass;
};


// method for adding properties to prototype
L.Class.include = function (props) {
	L.Util.extend(this.prototype, props);
};

L.Class.mergeOptions = function (options) {
	L.Util.extend(this.prototype.options, options);
};

/*
 * L.Mixin.Events adds custom events functionality to Leaflet classes
 */

var key = '_leaflet_events';

L.Mixin = {};

L.Mixin.Events = {
	
	addEventListener: function (types, fn, context) { // (String, Function[, Object]) or (Object[, Object])
		var events = this[key] = this[key] || {},
			type, i, len;
		
		// Types can be a map of types/handlers
		if (typeof types === 'object') {
			for (type in types) {
				if (types.hasOwnProperty(type)) {
					this.addEventListener(type, types[type], fn);
				}
			}
			
			return this;
		}
		
		types = L.Util.splitWords(types);
		
		for (i = 0, len = types.length; i < len; i++) {
			events[types[i]] = events[types[i]] || [];
			events[types[i]].push({
				action: fn,
				context: context || this
			});
		}
		
		return this;
	},

	hasEventListeners: function (type) { // (String) -> Boolean
		return (key in this) && (type in this[key]) && (this[key][type].length > 0);
	},

	removeEventListener: function (types, fn, context) { // (String[, Function, Object]) or (Object[, Object])
		var events = this[key],
			type, i, len, listeners, j;
		
		if (typeof types === 'object') {
			for (type in types) {
				if (types.hasOwnProperty(type)) {
					this.removeEventListener(type, types[type], fn);
				}
			}
			
			return this;
		}
		
		types = L.Util.splitWords(types);

		for (i = 0, len = types.length; i < len; i++) {

			if (this.hasEventListeners(types[i])) {
				listeners = events[types[i]];
				
				for (j = listeners.length - 1; j >= 0; j--) {
					if (
						(!fn || listeners[j].action === fn) &&
						(!context || (listeners[j].context === context))
					) {
						listeners.splice(j, 1);
					}
				}
			}
		}
		
		return this;
	},

	fireEvent: function (type, data) { // (String[, Object])
		if (!this.hasEventListeners(type)) {
			return this;
		}

		var event = L.Util.extend({
			type: type,
			target: this
		}, data);

		var listeners = this[key][type].slice();

		for (var i = 0, len = listeners.length; i < len; i++) {
			listeners[i].action.call(listeners[i].context || this, event);
		}

		return this;
	}
};

L.Mixin.Events.on = L.Mixin.Events.addEventListener;
L.Mixin.Events.off = L.Mixin.Events.removeEventListener;
L.Mixin.Events.fire = L.Mixin.Events.fireEvent;


(function () {
	var ua = navigator.userAgent.toLowerCase(),
		ie = !!window.ActiveXObject,
		ie6 = ie && !window.XMLHttpRequest,
		webkit = ua.indexOf("webkit") !== -1,
		gecko = ua.indexOf("gecko") !== -1,
		//Terrible browser detection to work around a safari / iOS / android browser bug. See TileLayer._addTile and debug/hacks/jitter.html
		chrome = ua.indexOf("chrome") !== -1,
		opera = window.opera,
		android = ua.indexOf("android") !== -1,
		android23 = ua.search("android [23]") !== -1,
		mobile = typeof orientation !== undefined + '' ? true : false,
		doc = document.documentElement,
		ie3d = ie && ('transition' in doc.style),
		webkit3d = webkit && ('WebKitCSSMatrix' in window) && ('m11' in new window.WebKitCSSMatrix()),
		gecko3d = gecko && ('MozPerspective' in doc.style),
		opera3d = opera && ('OTransition' in doc.style);

	var touch = !window.L_NO_TOUCH && (function () {
		var startName = 'ontouchstart';

		// WebKit, etc
		if (startName in doc) {
			return true;
		}

		// Firefox/Gecko
		var div = document.createElement('div'),
			supported = false;

		if (!div.setAttribute) {
			return false;
		}
		div.setAttribute(startName, 'return;');

		if (typeof div[startName] === 'function') {
			supported = true;
		}

		div.removeAttribute(startName);
		div = null;

		return supported;
	}());

	var retina = (('devicePixelRatio' in window && window.devicePixelRatio > 1) || ('matchMedia' in window && window.matchMedia("(min-resolution:144dpi)").matches));

	L.Browser = {
		ua: ua,
		ie: ie,
		ie6: ie6,
		webkit: webkit,
		gecko: gecko,
		opera: opera,
		android: android,
		android23: android23,

		chrome: chrome,

		ie3d: ie3d,
		webkit3d: webkit3d,
		gecko3d: gecko3d,
		opera3d: opera3d,
		any3d: !window.L_DISABLE_3D && (ie3d || webkit3d || gecko3d || opera3d),

		mobile: mobile,
		mobileWebkit: mobile && webkit,
		mobileWebkit3d: mobile && webkit3d,
		mobileOpera: mobile && opera,

		touch: touch,

		retina: retina
	};
}());


/*
 * L.Point represents a point with x and y coordinates.
 */

L.Point = function (/*Number*/ x, /*Number*/ y, /*Boolean*/ round) {
	this.x = (round ? Math.round(x) : x);
	this.y = (round ? Math.round(y) : y);
};

L.Point.prototype = {
	add: function (point) {
		return this.clone()._add(L.point(point));
	},

	_add: function (point) {
		this.x += point.x;
		this.y += point.y;
		return this;
	},

	subtract: function (point) {
		return this.clone()._subtract(L.point(point));
	},

	// destructive subtract (faster)
	_subtract: function (point) {
		this.x -= point.x;
		this.y -= point.y;
		return this;
	},

	divideBy: function (num, round) {
		return new L.Point(this.x / num, this.y / num, round);
	},

	multiplyBy: function (num, round) {
		return new L.Point(this.x * num, this.y * num, round);
	},

	distanceTo: function (point) {
		point = L.point(point);

		var x = point.x - this.x,
			y = point.y - this.y;

		return Math.sqrt(x * x + y * y);
	},

	round: function () {
		return this.clone()._round();
	},

	// destructive round
	_round: function () {
		this.x = Math.round(this.x);
		this.y = Math.round(this.y);
		return this;
	},

	floor: function () {
		return this.clone()._floor();
	},

	_floor: function () {
		this.x = Math.floor(this.x);
		this.y = Math.floor(this.y);
		return this;
	},

	clone: function () {
		return new L.Point(this.x, this.y);
	},

	toString: function () {
		return 'Point(' +
				L.Util.formatNum(this.x) + ', ' +
				L.Util.formatNum(this.y) + ')';
	}
};

L.point = function (x, y, round) {
	if (x instanceof L.Point) {
		return x;
	}
	if (x instanceof Array) {
		return new L.Point(x[0], x[1]);
	}
	if (isNaN(x)) {
		return x;
	}
	return new L.Point(x, y, round);
};


/*
 * L.Bounds represents a rectangular area on the screen in pixel coordinates.
 */

L.Bounds = L.Class.extend({

	initialize: function (a, b) {	//(Point, Point) or Point[]
		if (!a) { return; }

		var points = b ? [a, b] : a;

		for (var i = 0, len = points.length; i < len; i++) {
			this.extend(points[i]);
		}
	},

	// extend the bounds to contain the given point
	extend: function (point) { // (Point)
		point = L.point(point);

		if (!this.min && !this.max) {
			this.min = point.clone();
			this.max = point.clone();
		} else {
			this.min.x = Math.min(point.x, this.min.x);
			this.max.x = Math.max(point.x, this.max.x);
			this.min.y = Math.min(point.y, this.min.y);
			this.max.y = Math.max(point.y, this.max.y);
		}
		return this;
	},

	getCenter: function (round) { // (Boolean) -> Point
		return new L.Point(
				(this.min.x + this.max.x) / 2,
				(this.min.y + this.max.y) / 2, round);
	},

	getBottomLeft: function () { // -> Point
		return new L.Point(this.min.x, this.max.y);
	},

	getTopRight: function () { // -> Point
		return new L.Point(this.max.x, this.min.y);
	},

	contains: function (obj) { // (Bounds) or (Point) -> Boolean
		var min, max;

		if (typeof obj[0] === 'number' || obj instanceof L.Point) {
			obj = L.point(obj);
		} else {
			obj = L.bounds(obj);
		}

		if (obj instanceof L.Bounds) {
			min = obj.min;
			max = obj.max;
		} else {
			min = max = obj;
		}

		return (min.x >= this.min.x) &&
				(max.x <= this.max.x) &&
				(min.y >= this.min.y) &&
				(max.y <= this.max.y);
	},

	intersects: function (bounds) { // (Bounds) -> Boolean
		bounds = L.bounds(bounds);

		var min = this.min,
			max = this.max,
			min2 = bounds.min,
			max2 = bounds.max;

		var xIntersects = (max2.x >= min.x) && (min2.x <= max.x),
			yIntersects = (max2.y >= min.y) && (min2.y <= max.y);

		return xIntersects && yIntersects;
	}

});

L.bounds = function (a, b) { // (Bounds) or (Point, Point) or (Point[])
	if (!a || a instanceof L.Bounds) {
		return a;
	}
	return new L.Bounds(a, b);
};


/*
 * L.Transformation is an utility class to perform simple point transformations through a 2d-matrix.
 */

L.Transformation = L.Class.extend({
	initialize: function (/*Number*/ a, /*Number*/ b, /*Number*/ c, /*Number*/ d) {
		this._a = a;
		this._b = b;
		this._c = c;
		this._d = d;
	},

	transform: function (point, scale) {
		return this._transform(point.clone(), scale);
	},

	// destructive transform (faster)
	_transform: function (/*Point*/ point, /*Number*/ scale) /*-> Point*/ {
		scale = scale || 1;
		point.x = scale * (this._a * point.x + this._b);
		point.y = scale * (this._c * point.y + this._d);
		return point;
	},

	untransform: function (/*Point*/ point, /*Number*/ scale) /*-> Point*/ {
		scale = scale || 1;
		return new L.Point(
			(point.x / scale - this._b) / this._a,
			(point.y / scale - this._d) / this._c);
	}
});


/*
 * L.DomUtil contains various utility functions for working with DOM
 */

L.DomUtil = {
	get: function (id) {
		return (typeof id === 'string' ? document.getElementById(id) : id);
	},

	getStyle: function (el, style) {
		var value = el.style[style];
		if (!value && el.currentStyle) {
			value = el.currentStyle[style];
		}
		if (!value || value === 'auto') {
			var css = document.defaultView.getComputedStyle(el, null);
			value = css ? css[style] : null;
		}
		return (value === 'auto' ? null : value);
	},

	getViewportOffset: function (element) {
		var top = 0,
			left = 0,
			el = element,
			docBody = document.body;

		do {
			top += el.offsetTop || 0;
			left += el.offsetLeft || 0;

			if (el.offsetParent === docBody &&
					L.DomUtil.getStyle(el, 'position') === 'absolute') {
				break;
			}
			if (L.DomUtil.getStyle(el, 'position') === 'fixed') {
				top += docBody.scrollTop || 0;
				left += docBody.scrollLeft || 0;
				break;
			}

			el = el.offsetParent;
		} while (el);

		el = element;

		do {
			if (el === docBody) {
				break;
			}

			top -= el.scrollTop || 0;
			left -= el.scrollLeft || 0;

			el = el.parentNode;
		} while (el);

		return new L.Point(left, top);
	},

	create: function (tagName, className, container) {
		var el = document.createElement(tagName);
		el.className = className;
		if (container) {
			container.appendChild(el);
		}
		return el;
	},

	disableTextSelection: function () {
		if (document.selection && document.selection.empty) {
			document.selection.empty();
		}
		if (!this._onselectstart) {
			this._onselectstart = document.onselectstart;
			document.onselectstart = L.Util.falseFn;
		}
	},

	enableTextSelection: function () {
		document.onselectstart = this._onselectstart;
		this._onselectstart = null;
	},

	hasClass: function (el, name) {
		return (el.className.length > 0) &&
				new RegExp("(^|\\s)" + name + "(\\s|$)").test(el.className);
	},

	addClass: function (el, name) {
		if (!L.DomUtil.hasClass(el, name)) {
			el.className += (el.className ? ' ' : '') + name;
		}
	},

	removeClass: function (el, name) {
		function replaceFn(w, match) {
			if (match === name) {
				return '';
			}
			return w;
		}
		el.className = el.className
				.replace(/(\S+)\s*/g, replaceFn)
				.replace(/(^\s+|\s+$)/, '');
	},

	setOpacity: function (el, value) {

		if ('opacity' in el.style) {
			el.style.opacity = value;

		} else if (L.Browser.ie) {

			var filter = false,
				filterName = 'DXImageTransform.Microsoft.Alpha';

			// filters collection throws an error if we try to retrieve a filter that doesn't exist
			try { filter = el.filters.item(filterName); } catch (e) {}

			value = Math.round(value * 100);

			if (filter) {
				filter.Enabled = (value !== 100);
				filter.Opacity = value;
			} else {
				el.style.filter += ' progid:' + filterName + '(opacity=' + value + ')';
			}
		}
	},

	testProp: function (props) {
		var style = document.documentElement.style;

		for (var i = 0; i < props.length; i++) {
			if (props[i] in style) {
				return props[i];
			}
		}
		return false;
	},

	getTranslateString: function (point) {
		// On webkit browsers (Chrome/Safari/MobileSafari/Android) using translate3d instead of translate
		// makes animation smoother as it ensures HW accel is used. Firefox 13 doesn't care
		// (same speed either way), Opera 12 doesn't support translate3d

		var is3d = L.Browser.webkit3d,
			open = 'translate' + (is3d ? '3d' : '') + '(',
			close = (is3d ? ',0' : '') + ')';

		return open + point.x + 'px,' + point.y + 'px' + close;
	},

	getScaleString: function (scale, origin) {

		var preTranslateStr = L.DomUtil.getTranslateString(origin.add(origin.multiplyBy(-1 * scale))),
		    scaleStr = ' scale(' + scale + ') ';

		return preTranslateStr + scaleStr;
	},

	setPosition: function (el, point, disable3D) {
		el._leaflet_pos = point;
		if (!disable3D && L.Browser.any3d) {
			el.style[L.DomUtil.TRANSFORM] =  L.DomUtil.getTranslateString(point);

			// workaround for Android 2/3 stability (https://github.com/CloudMade/Leaflet/issues/69)
			if (L.Browser.mobileWebkit3d) {
				el.style.WebkitBackfaceVisibility = 'hidden';
			}
		} else {
			el.style.left = point.x + 'px';
			el.style.top = point.y + 'px';
		}
	},

	getPosition: function (el) {
		return el._leaflet_pos;
	}
};

L.Util.extend(L.DomUtil, {
	TRANSITION: L.DomUtil.testProp(['transition', 'webkitTransition', 'OTransition', 'MozTransition', 'msTransition']),
	TRANSFORM: L.DomUtil.testProp(['transform', 'WebkitTransform', 'OTransform', 'MozTransform', 'msTransform'])
});


/*
	CM.LatLng represents a geographical point with latitude and longtitude coordinates.
*/

L.LatLng = function (rawLat, rawLng, noWrap) { // (Number, Number[, Boolean])
	var lat = parseFloat(rawLat),
		lng = parseFloat(rawLng);

	if (isNaN(lat) || isNaN(lng)) {
		throw new Error('Invalid LatLng object: (' + rawLat + ', ' + rawLng + ')');
	}

	if (noWrap !== true) {
		lat = Math.max(Math.min(lat, 90), -90);					// clamp latitude into -90..90
		lng = (lng + 180) % 360 + ((lng < -180 || lng === 180) ? 180 : -180);	// wrap longtitude into -180..180
	}

	this.lat = lat;
	this.lng = lng;
};

L.Util.extend(L.LatLng, {
	DEG_TO_RAD: Math.PI / 180,
	RAD_TO_DEG: 180 / Math.PI,
	MAX_MARGIN: 1.0E-9 // max margin of error for the "equals" check
});

L.LatLng.prototype = {
	equals: function (obj) { // (LatLng) -> Boolean
		if (!obj) { return false; }

		obj = L.latLng(obj);

		var margin = Math.max(Math.abs(this.lat - obj.lat), Math.abs(this.lng - obj.lng));
		return margin <= L.LatLng.MAX_MARGIN;
	},

	toString: function () { // -> String
		return 'LatLng(' +
				L.Util.formatNum(this.lat) + ', ' +
				L.Util.formatNum(this.lng) + ')';
	},

	// Haversine distance formula, see http://en.wikipedia.org/wiki/Haversine_formula
	distanceTo: function (other) { // (LatLng) -> Number
		other = L.latLng(other);

		var R = 6378137, // earth radius in meters
			d2r = L.LatLng.DEG_TO_RAD,
			dLat = (other.lat - this.lat) * d2r,
			dLon = (other.lng - this.lng) * d2r,
			lat1 = this.lat * d2r,
			lat2 = other.lat * d2r,
			sin1 = Math.sin(dLat / 2),
			sin2 = Math.sin(dLon / 2);

		var a = sin1 * sin1 + sin2 * sin2 * Math.cos(lat1) * Math.cos(lat2);

		return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
	}
};

L.latLng = function (a, b, c) { // (LatLng) or ([Number, Number]) or (Number, Number, Boolean)
	if (a instanceof L.LatLng) {
		return a;
	}
	if (a instanceof Array) {
		return new L.LatLng(a[0], a[1]);
	}
	if (isNaN(a)) {
		return a;
	}
	return new L.LatLng(a, b, c);
};
 

/*
 * L.LatLngBounds represents a rectangular area on the map in geographical coordinates.
 */

L.LatLngBounds = L.Class.extend({
	initialize: function (southWest, northEast) {	// (LatLng, LatLng) or (LatLng[])
		if (!southWest) { return; }

		var latlngs = northEast ? [southWest, northEast] : southWest;

		for (var i = 0, len = latlngs.length; i < len; i++) {
			this.extend(latlngs[i]);
		}
	},

	// extend the bounds to contain the given point or bounds
	extend: function (obj) { // (LatLng) or (LatLngBounds)
		if (typeof obj[0] === 'number' || obj instanceof L.LatLng) {
			obj = L.latLng(obj);
		} else {
			obj = L.latLngBounds(obj);
		}

		if (obj instanceof L.LatLng) {
			if (!this._southWest && !this._northEast) {
				this._southWest = new L.LatLng(obj.lat, obj.lng, true);
				this._northEast = new L.LatLng(obj.lat, obj.lng, true);
			} else {
				this._southWest.lat = Math.min(obj.lat, this._southWest.lat);
				this._southWest.lng = Math.min(obj.lng, this._southWest.lng);

				this._northEast.lat = Math.max(obj.lat, this._northEast.lat);
				this._northEast.lng = Math.max(obj.lng, this._northEast.lng);
			}
		} else if (obj instanceof L.LatLngBounds) {
			this.extend(obj._southWest);
            this.extend(obj._northEast);
		}
		return this;
	},

	// extend the bounds by a percentage
	pad: function (bufferRatio) { // (Number) -> LatLngBounds
		var sw = this._southWest,
			ne = this._northEast,
			heightBuffer = Math.abs(sw.lat - ne.lat) * bufferRatio,
			widthBuffer = Math.abs(sw.lng - ne.lng) * bufferRatio;

		return new L.LatLngBounds(
			new L.LatLng(sw.lat - heightBuffer, sw.lng - widthBuffer),
			new L.LatLng(ne.lat + heightBuffer, ne.lng + widthBuffer));
	},

	getCenter: function () { // -> LatLng
		return new L.LatLng(
				(this._southWest.lat + this._northEast.lat) / 2,
				(this._southWest.lng + this._northEast.lng) / 2);
	},

	getSouthWest: function () {
		return this._southWest;
	},

	getNorthEast: function () {
		return this._northEast;
	},

	getNorthWest: function () {
		return new L.LatLng(this._northEast.lat, this._southWest.lng, true);
	},

	getSouthEast: function () {
		return new L.LatLng(this._southWest.lat, this._northEast.lng, true);
	},

	contains: function (obj) { // (LatLngBounds) or (LatLng) -> Boolean
		if (typeof obj[0] === 'number' || obj instanceof L.LatLng) {
			obj = L.latLng(obj);
		} else {
			obj = L.latLngBounds(obj);
		}

		var sw = this._southWest,
			ne = this._northEast,
			sw2, ne2;

		if (obj instanceof L.LatLngBounds) {
			sw2 = obj.getSouthWest();
			ne2 = obj.getNorthEast();
		} else {
			sw2 = ne2 = obj;
		}

		return (sw2.lat >= sw.lat) && (ne2.lat <= ne.lat) &&
				(sw2.lng >= sw.lng) && (ne2.lng <= ne.lng);
	},

	intersects: function (bounds) { // (LatLngBounds)
		bounds = L.latLngBounds(bounds);

		var sw = this._southWest,
			ne = this._northEast,
			sw2 = bounds.getSouthWest(),
			ne2 = bounds.getNorthEast();

		var latIntersects = (ne2.lat >= sw.lat) && (sw2.lat <= ne.lat),
			lngIntersects = (ne2.lng >= sw.lng) && (sw2.lng <= ne.lng);

		return latIntersects && lngIntersects;
	},

	toBBoxString: function () {
		var sw = this._southWest,
			ne = this._northEast;
		return [sw.lng, sw.lat, ne.lng, ne.lat].join(',');
	},

	equals: function (bounds) { // (LatLngBounds)
		if (!bounds) { return false; }

		bounds = L.latLngBounds(bounds);

		return this._southWest.equals(bounds.getSouthWest()) &&
		       this._northEast.equals(bounds.getNorthEast());
	}
});

//TODO International date line?

L.latLngBounds = function (a, b) { // (LatLngBounds) or (LatLng, LatLng)
	if (!a || a instanceof L.LatLngBounds) {
		return a;
	}
	return new L.LatLngBounds(a, b);
};


/*
 * L.Projection contains various geographical projections used by CRS classes.
 */

L.Projection = {};



L.Projection.SphericalMercator = {
	MAX_LATITUDE: 85.0511287798,

	project: function (latlng) { // (LatLng) -> Point
		var d = L.LatLng.DEG_TO_RAD,
			max = this.MAX_LATITUDE,
			lat = Math.max(Math.min(max, latlng.lat), -max),
			x = latlng.lng * d,
			y = lat * d;
		y = Math.log(Math.tan((Math.PI / 4) + (y / 2)));

		return new L.Point(x, y);
	},

	unproject: function (point) { // (Point, Boolean) -> LatLng
		var d = L.LatLng.RAD_TO_DEG,
			lng = point.x * d,
			lat = (2 * Math.atan(Math.exp(point.y)) - (Math.PI / 2)) * d;

		// TODO refactor LatLng wrapping
		return new L.LatLng(lat, lng, true);
	}
};



L.Projection.LonLat = {
	project: function (latlng) {
		return new L.Point(latlng.lng, latlng.lat);
	},

	unproject: function (point) {
		return new L.LatLng(point.y, point.x, true);
	}
};



L.CRS = {
	latLngToPoint: function (latlng, zoom) { // (LatLng, Number) -> Point
		var projectedPoint = this.projection.project(latlng),
		    scale = this.scale(zoom);

		return this.transformation._transform(projectedPoint, scale);
	},

	pointToLatLng: function (point, zoom) { // (Point, Number[, Boolean]) -> LatLng
		var scale = this.scale(zoom),
		    untransformedPoint = this.transformation.untransform(point, scale);

		return this.projection.unproject(untransformedPoint);
	},

	project: function (latlng) {
		return this.projection.project(latlng);
	},

	scale: function (zoom) {
		return 256 * Math.pow(2, zoom);
	}
};



L.CRS.EPSG3857 = L.Util.extend({}, L.CRS, {
	code: 'EPSG:3857',

	projection: L.Projection.SphericalMercator,
	transformation: new L.Transformation(0.5 / Math.PI, 0.5, -0.5 / Math.PI, 0.5),

	project: function (latlng) { // (LatLng) -> Point
		var projectedPoint = this.projection.project(latlng),
			earthRadius = 6378137;
		return projectedPoint.multiplyBy(earthRadius);
	}
});

L.CRS.EPSG900913 = L.Util.extend({}, L.CRS.EPSG3857, {
	code: 'EPSG:900913'
});



L.CRS.EPSG4326 = L.Util.extend({}, L.CRS, {
	code: 'EPSG:4326',

	projection: L.Projection.LonLat,
	transformation: new L.Transformation(1 / 360, 0.5, -1 / 360, 0.5)
});


/*
 * L.Map is the central class of the API - it is used to create a map.
 */

L.Map = L.Class.extend({

	includes: L.Mixin.Events,

	options: {
		crs: L.CRS.EPSG3857,

		/*
		center: LatLng,
		zoom: Number,
		layers: Array,
		*/

		fadeAnimation: L.DomUtil.TRANSITION && !L.Browser.android23,
		trackResize: true,
		markerZoomAnimation: L.DomUtil.TRANSITION && L.Browser.any3d
	},

	initialize: function (id, options) { // (HTMLElement or String, Object)
		options = L.Util.setOptions(this, options);

		this._initContainer(id);
		this._initLayout();
		this._initHooks();
		this._initEvents();

		if (options.maxBounds) {
			this.setMaxBounds(options.maxBounds);
		}

		if (options.center && options.zoom !== undefined) {
			this.setView(L.latLng(options.center), options.zoom, true);
		}

		this._initLayers(options.layers);
	},


	// public methods that modify map state

	// replaced by animation-powered implementation in Map.PanAnimation.js
	setView: function (center, zoom) {
		this._resetView(L.latLng(center), this._limitZoom(zoom));
		return this;
	},

	setZoom: function (zoom) { // (Number)
		return this.setView(this.getCenter(), zoom);
	},

	zoomIn: function () {
		return this.setZoom(this._zoom + 1);
	},

	zoomOut: function () {
		return this.setZoom(this._zoom - 1);
	},

	fitBounds: function (bounds) { // (LatLngBounds)
		var zoom = this.getBoundsZoom(bounds);
		return this.setView(L.latLngBounds(bounds).getCenter(), zoom);
	},

	fitWorld: function () {
		var sw = new L.LatLng(-60, -170),
		    ne = new L.LatLng(85, 179);

		return this.fitBounds(new L.LatLngBounds(sw, ne));
	},

	panTo: function (center) { // (LatLng)
		return this.setView(center, this._zoom);
	},

	panBy: function (offset) { // (Point)
		// replaced with animated panBy in Map.Animation.js
		this.fire('movestart');

		this._rawPanBy(L.point(offset));

		this.fire('move');
		return this.fire('moveend');
	},

	setMaxBounds: function (bounds) {
		bounds = L.latLngBounds(bounds);

		this.options.maxBounds = bounds;

		if (!bounds) {
			this._boundsMinZoom = null;
			return this;
		}

		var minZoom = this.getBoundsZoom(bounds, true);

		this._boundsMinZoom = minZoom;

		if (this._loaded) {
			if (this._zoom < minZoom) {
				this.setView(bounds.getCenter(), minZoom);
			} else {
				this.panInsideBounds(bounds);
			}
		}

		return this;
	},

	panInsideBounds: function (bounds) {
		bounds = L.latLngBounds(bounds);

		var viewBounds = this.getBounds(),
		    viewSw = this.project(viewBounds.getSouthWest()),
		    viewNe = this.project(viewBounds.getNorthEast()),
		    sw = this.project(bounds.getSouthWest()),
		    ne = this.project(bounds.getNorthEast()),
		    dx = 0,
		    dy = 0;

		if (viewNe.y < ne.y) { // north
			dy = ne.y - viewNe.y;
		}
		if (viewNe.x > ne.x) { // east
			dx = ne.x - viewNe.x;
		}
		if (viewSw.y > sw.y) { // south
			dy = sw.y - viewSw.y;
		}
		if (viewSw.x < sw.x) { // west
			dx = sw.x - viewSw.x;
		}

		return this.panBy(new L.Point(dx, dy, true));
	},

	addLayer: function (layer) {
		// TODO method is too big, refactor

		var id = L.Util.stamp(layer);

		if (this._layers[id]) { return this; }

		this._layers[id] = layer;

		// TODO getMaxZoom, getMinZoom in ILayer (instead of options)
		if (layer.options && !isNaN(layer.options.maxZoom)) {
			this._layersMaxZoom = Math.max(this._layersMaxZoom || 0, layer.options.maxZoom);
		}
		if (layer.options && !isNaN(layer.options.minZoom)) {
			this._layersMinZoom = Math.min(this._layersMinZoom || Infinity, layer.options.minZoom);
		}

		// TODO looks ugly, refactor!!!
		if (this.options.zoomAnimation && L.TileLayer && (layer instanceof L.TileLayer)) {
			this._tileLayersNum++;
            this._tileLayersToLoad++;
            layer.on('load', this._onTileLayerLoad, this);
		}

		var onMapLoad = function () {
			layer.onAdd(this);
			this.fire('layeradd', {layer: layer});
		};

		if (this._loaded) {
			onMapLoad.call(this);
		} else {
			this.on('load', onMapLoad, this);
		}

		return this;
	},

	removeLayer: function (layer) {
		var id = L.Util.stamp(layer);

		if (!this._layers[id]) { return; }

		layer.onRemove(this);

		delete this._layers[id];

		// TODO looks ugly, refactor
		if (this.options.zoomAnimation && L.TileLayer && (layer instanceof L.TileLayer)) {
			this._tileLayersNum--;
            this._tileLayersToLoad--;
            layer.off('load', this._onTileLayerLoad, this);
		}

		return this.fire('layerremove', {layer: layer});
	},

	hasLayer: function (layer) {
		var id = L.Util.stamp(layer);
		return this._layers.hasOwnProperty(id);
	},

	invalidateSize: function (animate) {
		var oldSize = this.getSize();

		this._sizeChanged = true;

		if (this.options.maxBounds) {
			this.setMaxBounds(this.options.maxBounds);
		}

		if (!this._loaded) { return this; }

		var offset = oldSize.subtract(this.getSize()).divideBy(2, true);

		if (animate === true) {
			this.panBy(offset);
		} else {
			this._rawPanBy(offset);

			this.fire('move');

			clearTimeout(this._sizeTimer);
			this._sizeTimer = setTimeout(L.Util.bind(this.fire, this, 'moveend'), 200);
		}
		return this;
	},

	// TODO handler.addTo
	addHandler: function (name, HandlerClass) {
		if (!HandlerClass) { return; }

		this[name] = new HandlerClass(this);

		if (this.options[name]) {
			this[name].enable();
		}

		return this;
	},


	// public methods for getting map state

	getCenter: function () { // (Boolean) -> LatLng
		return this.layerPointToLatLng(this._getCenterLayerPoint());
	},

	getZoom: function () {
		return this._zoom;
	},

	getBounds: function () {
		var bounds = this.getPixelBounds(),
		    sw = this.unproject(bounds.getBottomLeft()),
		    ne = this.unproject(bounds.getTopRight());

		return new L.LatLngBounds(sw, ne);
	},

	getMinZoom: function () {
		var z1 = this.options.minZoom || 0,
		    z2 = this._layersMinZoom || 0,
		    z3 = this._boundsMinZoom || 0;

		return Math.max(z1, z2, z3);
	},

	getMaxZoom: function () {
		var z1 = this.options.maxZoom === undefined ? Infinity : this.options.maxZoom,
		    z2 = this._layersMaxZoom  === undefined ? Infinity : this._layersMaxZoom;

		return Math.min(z1, z2);
	},

	getBoundsZoom: function (bounds, inside) { // (LatLngBounds, Boolean) -> Number
		bounds = L.latLngBounds(bounds);

		var size = this.getSize(),
		    zoom = this.options.minZoom || 0,
		    maxZoom = this.getMaxZoom(),
		    ne = bounds.getNorthEast(),
		    sw = bounds.getSouthWest(),
		    boundsSize,
		    nePoint,
		    swPoint,
		    zoomNotFound = true;

		if (inside) {
			zoom--;
		}

		do {
			zoom++;
			nePoint = this.project(ne, zoom);
			swPoint = this.project(sw, zoom);
			boundsSize = new L.Point(Math.abs(nePoint.x - swPoint.x), Math.abs(swPoint.y - nePoint.y));

			if (!inside) {
				zoomNotFound = boundsSize.x <= size.x && boundsSize.y <= size.y;
			} else {
				zoomNotFound = boundsSize.x < size.x || boundsSize.y < size.y;
			}
		} while (zoomNotFound && zoom <= maxZoom);

		if (zoomNotFound && inside) {
			return null;
		}

		return inside ? zoom : zoom - 1;
	},

	getSize: function () {
		if (!this._size || this._sizeChanged) {
			this._size = new L.Point(
				this._container.clientWidth,
				this._container.clientHeight);

			this._sizeChanged = false;
		}
		return this._size;
	},

	getPixelBounds: function () {
		var topLeftPoint = this._getTopLeftPoint();
		return new L.Bounds(topLeftPoint, topLeftPoint.add(this.getSize()));
	},

	getPixelOrigin: function () {
		return this._initialTopLeftPoint;
	},

	getPanes: function () {
		return this._panes;
	},

	getContainer: function () {
		return this._container;
	},


	// TODO replace with universal implementation after refactoring projections

	getZoomScale: function (toZoom) {
		var crs = this.options.crs;
		return crs.scale(toZoom) / crs.scale(this._zoom);
	},

	getScaleZoom: function (scale) {
		return this._zoom + (Math.log(scale) / Math.LN2);
	},


	// conversion methods

	project: function (latlng, zoom) { // (LatLng[, Number]) -> Point
		zoom = zoom === undefined ? this._zoom : zoom;
		return this.options.crs.latLngToPoint(L.latLng(latlng), zoom);
	},

	unproject: function (point, zoom) { // (Point[, Number]) -> LatLng
		zoom = zoom === undefined ? this._zoom : zoom;
		return this.options.crs.pointToLatLng(L.point(point), zoom);
	},

	layerPointToLatLng: function (point) { // (Point)
		var projectedPoint = L.point(point).add(this._initialTopLeftPoint);
		return this.unproject(projectedPoint);
	},

	latLngToLayerPoint: function (latlng) { // (LatLng)
		var projectedPoint = this.project(L.latLng(latlng))._round();
		return projectedPoint._subtract(this._initialTopLeftPoint);
	},

	containerPointToLayerPoint: function (point) { // (Point)
		return L.point(point).subtract(this._getMapPanePos());
	},

	layerPointToContainerPoint: function (point) { // (Point)
		return L.point(point).add(this._getMapPanePos());
	},

	containerPointToLatLng: function (point) {
		var layerPoint = this.containerPointToLayerPoint(L.point(point));
		return this.layerPointToLatLng(layerPoint);
	},

	latLngToContainerPoint: function (latlng) {
		return this.layerPointToContainerPoint(this.latLngToLayerPoint(L.latLng(latlng)));
	},

	mouseEventToContainerPoint: function (e) { // (MouseEvent)
		return L.DomEvent.getMousePosition(e, this._container);
	},

	mouseEventToLayerPoint: function (e) { // (MouseEvent)
		return this.containerPointToLayerPoint(this.mouseEventToContainerPoint(e));
	},

	mouseEventToLatLng: function (e) { // (MouseEvent)
		return this.layerPointToLatLng(this.mouseEventToLayerPoint(e));
	},


	// map initialization methods

	_initContainer: function (id) {
		var container = this._container = L.DomUtil.get(id);

		if (container._leaflet) {
			throw new Error("Map container is already initialized.");
		}

		container._leaflet = true;
	},

	_initLayout: function () {
		var container = this._container;

		container.innerHTML = '';
		L.DomUtil.addClass(container, 'leaflet-container');

		if (L.Browser.touch) {
			L.DomUtil.addClass(container, 'leaflet-touch');
		}

		if (this.options.fadeAnimation) {
			L.DomUtil.addClass(container, 'leaflet-fade-anim');
		}

		var position = L.DomUtil.getStyle(container, 'position');

		if (position !== 'absolute' && position !== 'relative' && position !== 'fixed') {
			container.style.position = 'relative';
		}

		this._initPanes();

		if (this._initControlPos) {
			this._initControlPos();
		}
	},

	_initPanes: function () {
		var panes = this._panes = {};

		this._mapPane = panes.mapPane = this._createPane('leaflet-map-pane', this._container);

		this._tilePane = panes.tilePane = this._createPane('leaflet-tile-pane', this._mapPane);
		this._objectsPane = panes.objectsPane = this._createPane('leaflet-objects-pane', this._mapPane);

		panes.shadowPane = this._createPane('leaflet-shadow-pane');
		panes.overlayPane = this._createPane('leaflet-overlay-pane');
		panes.markerPane = this._createPane('leaflet-marker-pane');
		panes.popupPane = this._createPane('leaflet-popup-pane');

		var zoomHide = ' leaflet-zoom-hide';

		if (!this.options.markerZoomAnimation) {
			L.DomUtil.addClass(panes.markerPane, zoomHide);
			L.DomUtil.addClass(panes.shadowPane, zoomHide);
			L.DomUtil.addClass(panes.popupPane, zoomHide);
		}
	},

	_createPane: function (className, container) {
		return L.DomUtil.create('div', className, container || this._objectsPane);
	},

	_initializers: [],

	_initHooks: function () {
		var i, len;
		for (i = 0, len = this._initializers.length; i < len; i++) {
			this._initializers[i].call(this);
		}
	},

	_initLayers: function (layers) {
		layers = layers ? (layers instanceof Array ? layers : [layers]) : [];

		this._layers = {};
		this._tileLayersNum = 0;

		var i, len;

		for (i = 0, len = layers.length; i < len; i++) {
			this.addLayer(layers[i]);
		}
	},


	// private methods that modify map state

	_resetView: function (center, zoom, preserveMapOffset, afterZoomAnim) {

		var zoomChanged = (this._zoom !== zoom);

		if (!afterZoomAnim) {
			this.fire('movestart');

			if (zoomChanged) {
				this.fire('zoomstart');
			}
		}

		this._zoom = zoom;

		this._initialTopLeftPoint = this._getNewTopLeftPoint(center);

		if (!preserveMapOffset) {
			L.DomUtil.setPosition(this._mapPane, new L.Point(0, 0));
		} else {
			this._initialTopLeftPoint._add(this._getMapPanePos());
		}

		this._tileLayersToLoad = this._tileLayersNum;

		this.fire('viewreset', {hard: !preserveMapOffset});

		this.fire('move');

		if (zoomChanged || afterZoomAnim) {
			this.fire('zoomend');
		}

		this.fire('moveend', {hard: !preserveMapOffset});

		if (!this._loaded) {
			this._loaded = true;
			this.fire('load');
		}
	},

	_rawPanBy: function (offset) {
		L.DomUtil.setPosition(this._mapPane, this._getMapPanePos().subtract(offset));
	},


	// map events

	_initEvents: function () {
		if (!L.DomEvent) { return; }

		L.DomEvent.on(this._container, 'click', this._onMouseClick, this);

		var events = ['dblclick', 'mousedown', 'mouseup', 'mouseenter', 'mouseleave', 'mousemove', 'contextmenu'],
			i, len;

		for (i = 0, len = events.length; i < len; i++) {
			L.DomEvent.on(this._container, events[i], this._fireMouseEvent, this);
		}

		if (this.options.trackResize) {
			L.DomEvent.on(window, 'resize', this._onResize, this);
		}
	},

	_onResize: function () {
		L.Util.cancelAnimFrame(this._resizeRequest);
		this._resizeRequest = L.Util.requestAnimFrame(this.invalidateSize, this, false, this._container);
	},

	_onMouseClick: function (e) {
		if (!this._loaded || (this.dragging && this.dragging.moved())) { return; }

		this.fire('preclick');
		this._fireMouseEvent(e);
	},

	_fireMouseEvent: function (e) {
		if (!this._loaded) { return; }

		var type = e.type;

		type = (type === 'mouseenter' ? 'mouseover' : (type === 'mouseleave' ? 'mouseout' : type));

		if (!this.hasEventListeners(type)) { return; }

		if (type === 'contextmenu') {
			L.DomEvent.preventDefault(e);
		}

		var containerPoint = this.mouseEventToContainerPoint(e),
			layerPoint = this.containerPointToLayerPoint(containerPoint),
			latlng = this.layerPointToLatLng(layerPoint);

		this.fire(type, {
			latlng: latlng,
			layerPoint: layerPoint,
			containerPoint: containerPoint,
			originalEvent: e
		});
	},

	_onTileLayerLoad: function () {
		// TODO super-ugly, refactor!!!
		// clear scaled tiles after all new tiles are loaded (for performance)
		this._tileLayersToLoad--;
		if (this._tileLayersNum && !this._tileLayersToLoad && this._tileBg) {
			clearTimeout(this._clearTileBgTimer);
			this._clearTileBgTimer = setTimeout(L.Util.bind(this._clearTileBg, this), 500);
		}
	},


	// private methods for getting map state

	_getMapPanePos: function () {
		return L.DomUtil.getPosition(this._mapPane);
	},

	_getTopLeftPoint: function () {
		if (!this._loaded) {
			throw new Error('Set map center and zoom first.');
		}

		return this._initialTopLeftPoint.subtract(this._getMapPanePos());
	},

	_getNewTopLeftPoint: function (center, zoom) {
		var viewHalf = this.getSize().divideBy(2);
		// TODO round on display, not calculation to increase precision?
		return this.project(center, zoom)._subtract(viewHalf)._round();
	},

	_latLngToNewLayerPoint: function (latlng, newZoom, newCenter) {
		var topLeft = this._getNewTopLeftPoint(newCenter, newZoom).add(this._getMapPanePos());
		return this.project(latlng, newZoom)._subtract(topLeft);
	},

	_getCenterLayerPoint: function () {
		return this.containerPointToLayerPoint(this.getSize().divideBy(2));
	},

	_getCenterOffset: function (center) {
		return this.latLngToLayerPoint(center).subtract(this._getCenterLayerPoint());
	},

	_limitZoom: function (zoom) {
		var min = this.getMinZoom(),
			max = this.getMaxZoom();

		return Math.max(min, Math.min(max, zoom));
	}
});

L.Map.addInitHook = function (fn) {
	var args = Array.prototype.slice.call(arguments, 1);

	var init = typeof fn === 'function' ? fn : function () {
		this[fn].apply(this, args);
	};

	this.prototype._initializers.push(init);
};

L.map = function (id, options) {
	return new L.Map(id, options);
};



L.Projection.Mercator = {
	MAX_LATITUDE: 85.0840591556,

	R_MINOR: 6356752.3142,
	R_MAJOR: 6378137,

	project: function (latlng) { // (LatLng) -> Point
		var d = L.LatLng.DEG_TO_RAD,
			max = this.MAX_LATITUDE,
			lat = Math.max(Math.min(max, latlng.lat), -max),
			r = this.R_MAJOR,
			r2 = this.R_MINOR,
			x = latlng.lng * d * r,
			y = lat * d,
			tmp = r2 / r,
			eccent = Math.sqrt(1.0 - tmp * tmp),
			con = eccent * Math.sin(y);

		con = Math.pow((1 - con) / (1 + con), eccent * 0.5);

		var ts = Math.tan(0.5 * ((Math.PI * 0.5) - y)) / con;
		y = -r2 * Math.log(ts);

		return new L.Point(x, y);
	},

	unproject: function (point) { // (Point, Boolean) -> LatLng
		var d = L.LatLng.RAD_TO_DEG,
			r = this.R_MAJOR,
			r2 = this.R_MINOR,
			lng = point.x * d / r,
			tmp = r2 / r,
			eccent = Math.sqrt(1 - (tmp * tmp)),
			ts = Math.exp(- point.y / r2),
			phi = (Math.PI / 2) - 2 * Math.atan(ts),
			numIter = 15,
			tol = 1e-7,
			i = numIter,
			dphi = 0.1,
			con;

		while ((Math.abs(dphi) > tol) && (--i > 0)) {
			con = eccent * Math.sin(phi);
			dphi = (Math.PI / 2) - 2 * Math.atan(ts * Math.pow((1.0 - con) / (1.0 + con), 0.5 * eccent)) - phi;
			phi += dphi;
		}

		return new L.LatLng(phi * d, lng, true);
	}
};



L.CRS.EPSG3395 = L.Util.extend({}, L.CRS, {
	code: 'EPSG:3395',

	projection: L.Projection.Mercator,

	transformation: (function () {
		var m = L.Projection.Mercator,
			r = m.R_MAJOR,
			r2 = m.R_MINOR;

		return new L.Transformation(0.5 / (Math.PI * r), 0.5, -0.5 / (Math.PI * r2), 0.5);
	}())
});


/*
 * L.TileLayer is used for standard xyz-numbered tile layers.
 */

L.TileLayer = L.Class.extend({
	includes: L.Mixin.Events,

	options: {
		minZoom: 0,
		maxZoom: 18,
		tileSize: 256,
		subdomains: 'abc',
		errorTileUrl: '',
		attribution: '',
		zoomOffset: 0,
		opacity: 1,
		/* (undefined works too)
		zIndex: null,
		tms: false,
		continuousWorld: false,
		noWrap: false,
		zoomReverse: false,
		detectRetina: false,
		reuseTiles: false,
		*/
		unloadInvisibleTiles: L.Browser.mobile,
		updateWhenIdle: L.Browser.mobile
	},

	initialize: function (url, options) {
		options = L.Util.setOptions(this, options);

		// detecting retina displays, adjusting tileSize and zoom levels
		if (options.detectRetina && L.Browser.retina && options.maxZoom > 0) {

			options.tileSize = Math.floor(options.tileSize / 2);
			options.zoomOffset++;

			if (options.minZoom > 0) {
				options.minZoom--;
			}
			this.options.maxZoom--;
		}

		this._url = url;

		var subdomains = this.options.subdomains;

		if (typeof subdomains === 'string') {
			this.options.subdomains = subdomains.split('');
		}
	},

	onAdd: function (map) {
		this._map = map;

		// create a container div for tiles
		this._initContainer();

		// create an image to clone for tiles
		this._createTileProto();

		// set up events
		map.on({
			'viewreset': this._resetCallback,
			'moveend': this._update
		}, this);

		if (!this.options.updateWhenIdle) {
			this._limitedUpdate = L.Util.limitExecByInterval(this._update, 150, this);
			map.on('move', this._limitedUpdate, this);
		}

		this._reset();
		this._update();
	},

	addTo: function (map) {
		map.addLayer(this);
		return this;
	},

	onRemove: function (map) {
		map._panes.tilePane.removeChild(this._container);

		map.off({
			'viewreset': this._resetCallback,
			'moveend': this._update
		}, this);

		if (!this.options.updateWhenIdle) {
			map.off('move', this._limitedUpdate, this);
		}

		this._container = null;
		this._map = null;
	},

	bringToFront: function () {
		var pane = this._map._panes.tilePane;

		if (this._container) {
			pane.appendChild(this._container);
			this._setAutoZIndex(pane, Math.max);
		}

		return this;
	},

	bringToBack: function () {
		var pane = this._map._panes.tilePane;

		if (this._container) {
			pane.insertBefore(this._container, pane.firstChild);
			this._setAutoZIndex(pane, Math.min);
		}

		return this;
	},

	getAttribution: function () {
		return this.options.attribution;
	},

	setOpacity: function (opacity) {
		this.options.opacity = opacity;

		if (this._map) {
			this._updateOpacity();
		}

		return this;
	},

	setZIndex: function (zIndex) {
		this.options.zIndex = zIndex;
		this._updateZIndex();

		return this;
	},

	setUrl: function (url, noRedraw) {
		this._url = url;

		if (!noRedraw) {
			this.redraw();
		}

		return this;
	},

	redraw: function () {
		if (this._map) {
			this._map._panes.tilePane.empty = false;
			this._reset(true);
			this._update();
		}
		return this;
	},

	_updateZIndex: function () {
		if (this._container && this.options.zIndex !== undefined) {
			this._container.style.zIndex = this.options.zIndex;
		}
	},

	_setAutoZIndex: function (pane, compare) {

		var layers = pane.getElementsByClassName('leaflet-layer'),
			edgeZIndex = -compare(Infinity, -Infinity), // -Ifinity for max, Infinity for min
			zIndex;

		for (var i = 0, len = layers.length; i < len; i++) {

			if (layers[i] !== this._container) {
				zIndex = parseInt(layers[i].style.zIndex, 10);

				if (!isNaN(zIndex)) {
					edgeZIndex = compare(edgeZIndex, zIndex);
				}
			}
		}

		this._container.style.zIndex = isFinite(edgeZIndex) ? edgeZIndex + compare(1, -1) : '';
	},

	_updateOpacity: function () {
		L.DomUtil.setOpacity(this._container, this.options.opacity);

		// stupid webkit hack to force redrawing of tiles
		var i,
			tiles = this._tiles;

		if (L.Browser.webkit) {
			for (i in tiles) {
				if (tiles.hasOwnProperty(i)) {
					tiles[i].style.webkitTransform += ' translate(0,0)';
				}
			}
		}
	},

	_initContainer: function () {
		var tilePane = this._map._panes.tilePane;

		if (!this._container || tilePane.empty) {
			this._container = L.DomUtil.create('div', 'leaflet-layer');

			this._updateZIndex();

			tilePane.appendChild(this._container);

			if (this.options.opacity < 1) {
				this._updateOpacity();
			}
		}
	},

	_resetCallback: function (e) {
		this._reset(e.hard);
	},

	_reset: function (clearOldContainer) {
		var key,
			tiles = this._tiles;

		for (key in tiles) {
			if (tiles.hasOwnProperty(key)) {
				this.fire('tileunload', {tile: tiles[key]});
			}
		}

		this._tiles = {};
		this._tilesToLoad = 0;

		if (this.options.reuseTiles) {
			this._unusedTiles = [];
		}

		if (clearOldContainer && this._container) {
			this._container.innerHTML = "";
		}

		this._initContainer();
	},

	_update: function (e) {
		if (this._map._panTransition && this._map._panTransition._inProgress) { return; }

		var bounds   = this._map.getPixelBounds(),
		    zoom     = this._map.getZoom(),
		    tileSize = this.options.tileSize;

		if (zoom > this.options.maxZoom || zoom < this.options.minZoom) {
			return;
		}

		var nwTilePoint = new L.Point(
				Math.floor(bounds.min.x / tileSize),
				Math.floor(bounds.min.y / tileSize)),
			seTilePoint = new L.Point(
				Math.floor(bounds.max.x / tileSize),
				Math.floor(bounds.max.y / tileSize)),
			tileBounds = new L.Bounds(nwTilePoint, seTilePoint);

		this._addTilesFromCenterOut(tileBounds);

		if (this.options.unloadInvisibleTiles || this.options.reuseTiles) {
			this._removeOtherTiles(tileBounds);
		}
	},

	_addTilesFromCenterOut: function (bounds) {
		var queue = [],
			center = bounds.getCenter();

		var j, i, point;

		for (j = bounds.min.y; j <= bounds.max.y; j++) {
			for (i = bounds.min.x; i <= bounds.max.x; i++) {
				point = new L.Point(i, j);

				if (this._tileShouldBeLoaded(point)) {
					queue.push(point);
				}
			}
		}

		var tilesToLoad = queue.length;

		if (tilesToLoad === 0) { return; }

		// load tiles in order of their distance to center
		queue.sort(function (a, b) {
			return a.distanceTo(center) - b.distanceTo(center);
		});

		var fragment = document.createDocumentFragment();

		// if its the first batch of tiles to load
		if (!this._tilesToLoad) {
			this.fire('loading');
		}

		this._tilesToLoad += tilesToLoad;

		for (i = 0; i < tile