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/*
Leaflet 1.0.0, a JS library for interactive maps. http://leafletjs.com
(c) 2010-2016 Vladimir Agafonkin, (c) 2010-2011 CloudMade
*/
(function (window, document, undefined) {
var L = {
version: "1.0.0"
};
function expose() {
var oldL = window.L;
L.noConflict = function () {
window.L = oldL;
return this;
};
window.L = L;
}
// define Leaflet for Node module pattern loaders, including Browserify
if (typeof module === 'object' && typeof module.exports === 'object') {
module.exports = L;
// define Leaflet as an AMD module
} else if (typeof define === 'function' && define.amd) {
define(L);
}
// define Leaflet as a global L variable, saving the original L to restore later if needed
if (typeof window !== 'undefined') {
expose();
}
/*
* @namespace Util
*
* Various utility functions, used by Leaflet internally.
*/
L.Util = {
// @function extend(dest: Object, src?: Object): Object
// Merges the properties of the `src` object (or multiple objects) into `dest` object and returns the latter. Has an `L.extend` shortcut.
extend: function (dest) {
var i, j, len, src;
for (j = 1, len = arguments.length; j < len; j++) {
src = arguments[j];
for (i in src) {
dest[i] = src[i];
}
}
return dest;
},
// @function create(proto: Object, properties?: Object): Object
// Compatibility polyfill for [Object.create](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/create)
create: Object.create || (function () {
function F() {}
return function (proto) {
F.prototype = proto;
return new F();
};
})(),
// @function bind(fn: Function, …): Function
// Returns a new function bound to the arguments passed, like [Function.prototype.bind](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Function/bind).
// Has a `L.bind()` shortcut.
bind: function (fn, obj) {
var slice = Array.prototype.slice;
if (fn.bind) {
return fn.bind.apply(fn, slice.call(arguments, 1));
}
var args = slice.call(arguments, 2);
return function () {
return fn.apply(obj, args.length ? args.concat(slice.call(arguments)) : arguments);
};
},
// @function stamp(obj: Object): Number
// Returns the unique ID of an object, assiging it one if it doesn't have it.
stamp: function (obj) {
/*eslint-disable */
obj._leaflet_id = obj._leaflet_id || ++L.Util.lastId;
return obj._leaflet_id;
/*eslint-enable */
},
// @property lastId: Number
// Last unique ID used by [`stamp()`](#util-stamp)
lastId: 0,
// @function throttle(fn: Function, time: Number, context: Object): Function
// Returns a function which executes function `fn` with the given scope `context`
// (so that the `this` keyword refers to `context` inside `fn`'s code). The function
// `fn` will be called no more than one time per given amount of `time`. The arguments
// received by the bound function will be any arguments passed when binding the
// function, followed by any arguments passed when invoking the bound function.
// Has an `L.bind` shortcut.
throttle: function (fn, time, context) {
var lock, args, wrapperFn, later;
later = function () {
// reset lock and call if queued
lock = false;
if (args) {
wrapperFn.apply(context, args);
args = false;
}
};
wrapperFn = function () {
if (lock) {
// called too soon, queue to call later
args = arguments;
} else {
// call and lock until later
fn.apply(context, arguments);
setTimeout(later, time);
lock = true;
}
};
return wrapperFn;
},
// @function wrapNum(num: Number, range: Number[], includeMax?: Boolean): Number
// Returns the number `num` modulo `range` in such a way so it lies within
// `range[0]` and `range[1]`. The returned value will be always smaller than
// `range[1]` unless `includeMax` is set to `true`.
wrapNum: function (x, range, includeMax) {
var max = range[1],
min = range[0],
d = max - min;
return x === max && includeMax ? x : ((x - min) % d + d) % d + min;
},
// @function falseFn(): Function
// Returns a function which always returns `false`.
falseFn: function () { return false; },
// @function formatNum(num: Number, digits?: Number): Number
// Returns the number `num` rounded to `digits` decimals, or to 5 decimals by default.
formatNum: function (num, digits) {
var pow = Math.pow(10, digits || 5);
return Math.round(num * pow) / pow;
},
// @function trim(str: String): String
// Compatibility polyfill for [String.prototype.trim](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String/Trim)
trim: function (str) {
return str.trim ? str.trim() : str.replace(/^\s+|\s+$/g, '');
},
// @function splitWords(str: String): String[]
// Trims and splits the string on whitespace and returns the array of parts.
splitWords: function (str) {
return L.Util.trim(str).split(/\s+/);
},
// @function setOptions(obj: Object, options: Object): Object
// Merges the given properties to the `options` of the `obj` object, returning the resulting options. See `Class options`. Has an `L.setOptions` shortcut.
setOptions: function (obj, options) {
if (!obj.hasOwnProperty('options')) {
obj.options = obj.options ? L.Util.create(obj.options) : {};
}
for (var i in options) {
obj.options[i] = options[i];
}
return obj.options;
},
// @function getParamString(obj: Object, existingUrl?: String, uppercase?: Boolean): String
// Converts an object into a parameter URL string, e.g. `{a: "foo", b: "bar"}`
// translates to `'?a=foo&b=bar'`. If `existingUrl` is set, the parameters will
// be appended at the end. If `uppercase` is `true`, the parameter names will
// be uppercased (e.g. `'?A=foo&B=bar'`)
getParamString: function (obj, existingUrl, uppercase) {
var params = [];
for (var i in obj) {
params.push(encodeURIComponent(uppercase ? i.toUpperCase() : i) + '=' + encodeURIComponent(obj[i]));
}
return ((!existingUrl || existingUrl.indexOf('?') === -1) ? '?' : '&') + params.join('&');
},
// @function template(str: String, data: Object): String
// Simple templating facility, accepts a template string of the form `'Hello {a}, {b}'`
// and a data object like `{a: 'foo', b: 'bar'}`, returns evaluated string
// `('Hello foo, bar')`. You can also specify functions instead of strings for
// data values — they will be evaluated passing `data` as an argument.
template: function (str, data) {
return str.replace(L.Util.templateRe, function (str, key) {
var value = data[key];
if (value === undefined) {
throw new Error('No value provided for variable ' + str);
} else if (typeof value === 'function') {
value = value(data);
}
return value;
});
},
templateRe: /\{ *([\w_\-]+) *\}/g,
// @function isArray(obj): Boolean
// Compatibility polyfill for [Array.isArray](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray)
isArray: Array.isArray || function (obj) {
return (Object.prototype.toString.call(obj) === '[object Array]');
},
// @function indexOf(array: Array, el: Object): Number
// Compatibility polyfill for [Array.prototype.indexOf](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf)
indexOf: function (array, el) {
for (var i = 0; i < array.length; i++) {
if (array[i] === el) { return i; }
}
return -1;
},
// @property emptyImageUrl: String
// Data URI string containing a base64-encoded empty GIF image.
// Used as a hack to free memory from unused images on WebKit-powered
// mobile devices (by setting image `src` to this string).
emptyImageUrl: 'data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs='
};
(function () {
// inspired by http://paulirish.com/2011/requestanimationframe-for-smart-animating/
function getPrefixed(name) {
return window['webkit' + name] || window['moz' + name] || window['ms' + name];
}
var lastTime = 0;
// fallback for IE 7-8
function timeoutDefer(fn) {
var time = +new Date(),
timeToCall = Math.max(0, 16 - (time - lastTime));
lastTime = time + timeToCall;
return window.setTimeout(fn, timeToCall);
}
var requestFn = window.requestAnimationFrame || getPrefixed('RequestAnimationFrame') || timeoutDefer,
cancelFn = window.cancelAnimationFrame || getPrefixed('CancelAnimationFrame') ||
getPrefixed('CancelRequestAnimationFrame') || function (id) { window.clearTimeout(id); };
// @function requestAnimFrame(fn: Function, context?: Object, immediate?: Boolean): Number
// Schedules `fn` to be executed when the browser repaints. `fn` is bound to
// `context` if given. When `immediate` is set, `fn` is called immediately if
// the browser doesn't have native support for
// [`window.requestAnimationFrame`](https://developer.mozilla.org/docs/Web/API/window/requestAnimationFrame),
// otherwise it's delayed. Returns a request ID that can be used to cancel the request.
L.Util.requestAnimFrame = function (fn, context, immediate) {
if (immediate && requestFn === timeoutDefer) {
fn.call(context);
} else {
return requestFn.call(window, L.bind(fn, context));
}
};
// @function cancelAnimFrame(id: Number): undefined
// Cancels a previous `requestAnimFrame`. See also [window.cancelAnimationFrame](https://developer.mozilla.org/docs/Web/API/window/cancelAnimationFrame).
L.Util.cancelAnimFrame = function (id) {
if (id) {
cancelFn.call(window, id);
}
};
})();
// shortcuts for most used utility functions
L.extend = L.Util.extend;
L.bind = L.Util.bind;
L.stamp = L.Util.stamp;
L.setOptions = L.Util.setOptions;
// @class Class
// @aka L.Class
// @section
// @uninheritable
// Thanks to John Resig and Dean Edwards for inspiration!
L.Class = function () {};
L.Class.extend = function (props) {
// @function extend(props: Object): Function
// [Extends the current class](#class-inheritance) given the properties to be included.
// Returns a Javascript function that is a class constructor (to be called with `new`).
var NewClass = function () {
// call the constructor
if (this.initialize) {
this.initialize.apply(this, arguments);
}
// call all constructor hooks
this.callInitHooks();
};
var parentProto = NewClass.__super__ = this.prototype;
var proto = L.Util.create(parentProto);
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.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 (proto.options) {
props.options = L.Util.extend(L.Util.create(proto.options), props.options);
}
// mix given properties into the prototype
L.extend(proto, props);
proto._initHooks = [];
// add method for calling all hooks
proto.callInitHooks = function () {
if (this._initHooksCalled) { return; }
if (parentProto.callInitHooks) {
parentProto.callInitHooks.call(this);
}
this._initHooksCalled = true;
for (var i = 0, len = proto._initHooks.length; i < len; i++) {
proto._initHooks[i].call(this);
}
};
return NewClass;
};
// @function include(properties: Object): this
// [Includes a mixin](#class-includes) into the current class.
L.Class.include = function (props) {
L.extend(this.prototype, props);
return this;
};
// @function mergeOptions(options: Object): this
// [Merges `options`](#class-options) into the defaults of the class.
L.Class.mergeOptions = function (options) {
L.extend(this.prototype.options, options);
return this;
};
// @function addInitHook(fn: Function): this
// Adds a [constructor hook](#class-constructor-hooks) to the class.
L.Class.addInitHook = function (fn) { // (Function) || (String, args...)
var args = Array.prototype.slice.call(arguments, 1);
var init = typeof fn === 'function' ? fn : function () {
this[fn].apply(this, args);
};
this.prototype._initHooks = this.prototype._initHooks || [];
this.prototype._initHooks.push(init);
return this;
};
/*
* @class Evented
* @aka L.Evented
* @inherits Class
*
* A set of methods shared between event-powered classes (like `Map` and `Marker`). Generally, events allow you to execute some function when something happens with an object (e.g. the user clicks on the map, causing the map to fire `'click'` event).
*
* @example
*
* ```js
* map.on('click', function(e) {
* alert(e.latlng);
* } );
* ```
*
* Leaflet deals with event listeners by reference, so if you want to add a listener and then remove it, define it as a function:
*
* ```js
* function onClick(e) { ... }
*
* map.on('click', onClick);
* map.off('click', onClick);
* ```
*/
L.Evented = L.Class.extend({
/* @method on(type: String, fn: Function, context?: Object): this
* Adds a listener function (`fn`) to a particular event type of the object. You can optionally specify the context of the listener (object the this keyword will point to). You can also pass several space-separated types (e.g. `'click dblclick'`).
*
* @alternative
* @method on(eventMap: Object): this
* Adds a set of type/listener pairs, e.g. `{click: onClick, mousemove: onMouseMove}`
*/
on: function (types, fn, context) {
// types can be a map of types/handlers
if (typeof types === 'object') {
for (var type in types) {
// we don't process space-separated events here for performance;
// it's a hot path since Layer uses the on(obj) syntax
this._on(type, types[type], fn);
}
} else {
// types can be a string of space-separated words
types = L.Util.splitWords(types);
for (var i = 0, len = types.length; i < len; i++) {
this._on(types[i], fn, context);
}
}
return this;
},
/* @method off(type: String, fn?: Function, context?: Object): this
* Removes a previously added listener function. If no function is specified, it will remove all the listeners of that particular event from the object. Note that if you passed a custom context to `on`, you must pass the same context to `off` in order to remove the listener.
*
* @alternative
* @method off(eventMap: Object): this
* Removes a set of type/listener pairs.
*
* @alternative
* @method off: this
* Removes all listeners to all events on the object.
*/
off: function (types, fn, context) {
if (!types) {
// clear all listeners if called without arguments
delete this._events;
} else if (typeof types === 'object') {
for (var type in types) {
this._off(type, types[type], fn);
}
} else {
types = L.Util.splitWords(types);
for (var i = 0, len = types.length; i < len; i++) {
this._off(types[i], fn, context);
}
}
return this;
},
// attach listener (without syntactic sugar now)
_on: function (type, fn, context) {
this._events = this._events || {};
/* get/init listeners for type */
var typeListeners = this._events[type];
if (!typeListeners) {
typeListeners = [];
this._events[type] = typeListeners;
}
if (context === this) {
// Less memory footprint.
context = undefined;
}
var newListener = {fn: fn, ctx: context},
listeners = typeListeners;
// check if fn already there
for (var i = 0, len = listeners.length; i < len; i++) {
if (listeners[i].fn === fn && listeners[i].ctx === context) {
return;
}
}
listeners.push(newListener);
typeListeners.count++;
},
_off: function (type, fn, context) {
var listeners,
i,
len;
if (!this._events) { return; }
listeners = this._events[type];
if (!listeners) {
return;
}
if (!fn) {
// Set all removed listeners to noop so they are not called if remove happens in fire
for (i = 0, len = listeners.length; i < len; i++) {
listeners[i].fn = L.Util.falseFn;
}
// clear all listeners for a type if function isn't specified
delete this._events[type];
return;
}
if (context === this) {
context = undefined;
}
if (listeners) {
// find fn and remove it
for (i = 0, len = listeners.length; i < len; i++) {
var l = listeners[i];
if (l.ctx !== context) { continue; }
if (l.fn === fn) {
// set the removed listener to noop so that's not called if remove happens in fire
l.fn = L.Util.falseFn;
if (this._firingCount) {
/* copy array in case events are being fired */
this._events[type] = listeners = listeners.slice();
}
listeners.splice(i, 1);
return;
}
}
}
},
// @method fire(type: String, data?: Object, propagate?: Boolean): this
// Fires an event of the specified type. You can optionally provide an data
// object — the first argument of the listener function will contain its
// properties. The event might can optionally be propagated to event parents.
fire: function (type, data, propagate) {
if (!this.listens(type, propagate)) { return this; }
var event = L.Util.extend({}, data, {type: type, target: this});
if (this._events) {
var listeners = this._events[type];
if (listeners) {
this._firingCount = (this._firingCount + 1) || 1;
for (var i = 0, len = listeners.length; i < len; i++) {
var l = listeners[i];
l.fn.call(l.ctx || this, event);
}
this._firingCount--;
}
}
if (propagate) {
// propagate the event to parents (set with addEventParent)
this._propagateEvent(event);
}
return this;
},
// @method listens(type: String): Boolean
// Returns `true` if a particular event type has any listeners attached to it.
listens: function (type, propagate) {
var listeners = this._events && this._events[type];
if (listeners && listeners.length) { return true; }
if (propagate) {
// also check parents for listeners if event propagates
for (var id in this._eventParents) {
if (this._eventParents[id].listens(type, propagate)) { return true; }
}
}
return false;
},
// @method once(…): this
// Behaves as [`on(…)`](#evented-on), except the listener will only get fired once and then removed.
once: function (types, fn, context) {
if (typeof types === 'object') {
for (var type in types) {
this.once(type, types[type], fn);
}
return this;
}
var handler = L.bind(function () {
this
.off(types, fn, context)
.off(types, handler, context);
}, this);
// add a listener that's executed once and removed after that
return this
.on(types, fn, context)
.on(types, handler, context);
},
// @method addEventParent(obj: Evented): this
// Adds an event parent - an `Evented` that will receive propagated events
addEventParent: function (obj) {
this._eventParents = this._eventParents || {};
this._eventParents[L.stamp(obj)] = obj;
return this;
},
// @method removeEventParent(obj: Evented): this
// Removes an event parent, so it will stop receiving propagated events
removeEventParent: function (obj) {
if (this._eventParents) {
delete this._eventParents[L.stamp(obj)];
}
return this;
},
_propagateEvent: function (e) {
for (var id in this._eventParents) {
this._eventParents[id].fire(e.type, L.extend({layer: e.target}, e), true);
}
}
});
var proto = L.Evented.prototype;
// aliases; we should ditch those eventually
// @method addEventListener(…): this
// Alias to [`on(…)`](#evented-on)
proto.addEventListener = proto.on;
// @method removeEventListener(…): this
// Alias to [`off(…)`](#evented-off)
// @method clearAllEventListeners(…): this
// Alias to [`off()`](#evented-off)
proto.removeEventListener = proto.clearAllEventListeners = proto.off;
// @method addOneTimeEventListener(…): this
// Alias to [`once(…)`](#evented-once)
proto.addOneTimeEventListener = proto.once;
// @method fireEvent(…): this
// Alias to [`fire(…)`](#evented-fire)
proto.fireEvent = proto.fire;
// @method hasEventListeners(…): Boolean
// Alias to [`listens(…)`](#evented-listens)
proto.hasEventListeners = proto.listens;
L.Mixin = {Events: proto};
/*
* @namespace Browser
* @aka L.Browser
*
* A namespace with static properties for browser/feature detection used by Leaflet internally.
*
* @example
*
* ```js
* if (L.Browser.ielt9) {
* alert('Upgrade your browser, dude!');
* }
* ```
*/
(function () {
var ua = navigator.userAgent.toLowerCase(),
doc = document.documentElement,
ie = 'ActiveXObject' in window,
webkit = ua.indexOf('webkit') !== -1,
phantomjs = ua.indexOf('phantom') !== -1,
android23 = ua.search('android [23]') !== -1,
chrome = ua.indexOf('chrome') !== -1,
gecko = ua.indexOf('gecko') !== -1 && !webkit && !window.opera && !ie,
win = navigator.platform.indexOf('Win') === 0,
mobile = typeof orientation !== 'undefined' || ua.indexOf('mobile') !== -1,
msPointer = !window.PointerEvent && window.MSPointerEvent,
pointer = window.PointerEvent || msPointer,
ie3d = ie && ('transition' in doc.style),
webkit3d = ('WebKitCSSMatrix' in window) && ('m11' in new window.WebKitCSSMatrix()) && !android23,
gecko3d = 'MozPerspective' in doc.style,
opera12 = 'OTransition' in doc.style;
var touch = !window.L_NO_TOUCH && (pointer || 'ontouchstart' in window ||
(window.DocumentTouch && document instanceof window.DocumentTouch));
L.Browser = {
// @property ie: Boolean
// `true` for all Internet Explorer versions (not Edge).
ie: ie,
// @property ielt9: Boolean
// `true` for Internet Explorer versions less than 9.
ielt9: ie && !document.addEventListener,
// @property edge: Boolean
// `true` for the Edge web browser.
edge: 'msLaunchUri' in navigator && !('documentMode' in document),
// @property webkit: Boolean
// `true` for webkit-based browsers like Chrome and Safari (including mobile versions).
webkit: webkit,
// @property gecko: Boolean
// `true` for gecko-based browsers like Firefox.
gecko: gecko,
// @property android: Boolean
// `true` for any browser running on an Android platform.
android: ua.indexOf('android') !== -1,
// @property android23: Boolean
// `true` for browsers running on Android 2 or Android 3.
android23: android23,
// @property chrome: Boolean
// `true` for the Chrome browser.
chrome: chrome,
// @property safari: Boolean
// `true` for the Safari browser.
safari: !chrome && ua.indexOf('safari') !== -1,
// @property win: Boolean
// `true` when the browser is running in a Windows platform
win: win,
// @property ie3d: Boolean
// `true` for all Internet Explorer versions supporting CSS transforms.
ie3d: ie3d,
// @property webkit3d: Boolean
// `true` for webkit-based browsers supporting CSS transforms.
webkit3d: webkit3d,
// @property gecko3d: Boolean
// `true` for gecko-based browsers supporting CSS transforms.
gecko3d: gecko3d,
// @property opera12: Boolean
// `true` for the Opera browser supporting CSS transforms (version 12 or later).
opera12: opera12,
// @property any3d: Boolean
// `true` for all browsers supporting CSS transforms.
any3d: !window.L_DISABLE_3D && (ie3d || webkit3d || gecko3d) && !opera12 && !phantomjs,
// @property mobile: Boolean
// `true` for all browsers running in a mobile device.
mobile: mobile,
// @property mobileWebkit: Boolean
// `true` for all webkit-based browsers in a mobile device.
mobileWebkit: mobile && webkit,
// @property mobileWebkit3d: Boolean
// `true` for all webkit-based browsers in a mobile device supporting CSS transforms.
mobileWebkit3d: mobile && webkit3d,
// @property mobileOpera: Boolean
// `true` for the Opera browser in a mobile device.
mobileOpera: mobile && window.opera,
// @property mobileGecko: Boolean
// `true` for gecko-based browsers running in a mobile device.
mobileGecko: mobile && gecko,
// @property touch: Boolean
// `true` for all browsers supporting [touch events](https://developer.mozilla.org/docs/Web/API/Touch_events).
touch: !!touch,
// @property msPointer: Boolean
// `true` for browsers implementing the Microsoft touch events model (notably IE10).
msPointer: !!msPointer,
// @property pointer: Boolean
// `true` for all browsers supporting [pointer events](https://msdn.microsoft.com/en-us/library/dn433244%28v=vs.85%29.aspx).
pointer: !!pointer,
// @property retina: Boolean
// `true` for browsers on a high-resolution "retina" screen.
retina: (window.devicePixelRatio || (window.screen.deviceXDPI / window.screen.logicalXDPI)) > 1
};
}());
/*
* @class Point
* @aka L.Point
*
* Represents a point with `x` and `y` coordinates in pixels.
*
* @example
*
* ```js
* var point = L.point(200, 300);
* ```
*
* All Leaflet methods and options that accept `Point` objects also accept them in a simple Array form (unless noted otherwise), so these lines are equivalent:
*
* ```js
* map.panBy([200, 300]);
* map.panBy(L.point(200, 300));
* ```
*/
L.Point = function (x, y, round) {
this.x = (round ? Math.round(x) : x);
this.y = (round ? Math.round(y) : y);
};
L.Point.prototype = {
// @method clone(): Point
// Returns a copy of the current point.
clone: function () {
return new L.Point(this.x, this.y);
},
// @method add(otherPoint: Point): Point
// Returns the result of addition of the current and the given points.
add: function (point) {
// non-destructive, returns a new point
return this.clone()._add(L.point(point));
},
_add: function (point) {
// destructive, used directly for performance in situations where it's safe to modify existing point
this.x += point.x;
this.y += point.y;
return this;
},
// @method subtract(otherPoint: Point): Point
// Returns the result of subtraction of the given point from the current.
subtract: function (point) {
return this.clone()._subtract(L.point(point));
},
_subtract: function (point) {
this.x -= point.x;
this.y -= point.y;
return this;
},
// @method divideBy(num: Number): Point
// Returns the result of division of the current point by the given number.
divideBy: function (num) {
return this.clone()._divideBy(num);
},
_divideBy: function (num) {
this.x /= num;
this.y /= num;
return this;
},
// @method multiplyBy(num: Number): Point
// Returns the result of multiplication of the current point by the given number.
multiplyBy: function (num) {
return this.clone()._multiplyBy(num);
},
_multiplyBy: function (num) {
this.x *= num;
this.y *= num;
return this;
},
// @method scaleBy(scale: Point): Point
// Multiply each coordinate of the current point by each coordinate of
// `scale`. In linear algebra terms, multiply the point by the
// [scaling matrix](https://en.wikipedia.org/wiki/Scaling_%28geometry%29#Matrix_representation)
// defined by `scale`.
scaleBy: function (point) {
return new L.Point(this.x * point.x, this.y * point.y);
},
// @method unscaleBy(scale: Point): Point
// Inverse of `scaleBy`. Divide each coordinate of the current point by
// each coordinate of `scale`.
unscaleBy: function (point) {
return new L.Point(this.x / point.x, this.y / point.y);
},
// @method round(): Point
// Returns a copy of the current point with rounded coordinates.
round: function () {
return this.clone()._round();
},
_round: function () {
this.x = Math.round(this.x);
this.y = Math.round(this.y);
return this;
},
// @method floor(): Point
// Returns a copy of the current point with floored coordinates (rounded down).
floor: function () {
return this.clone()._floor();
},
_floor: function () {
this.x = Math.floor(this.x);
this.y = Math.floor(this.y);
return this;
},
// @method ceil(): Point
// Returns a copy of the current point with ceiled coordinates (rounded up).
ceil: function () {
return this.clone()._ceil();
},
_ceil: function () {
this.x = Math.ceil(this.x);
this.y = Math.ceil(this.y);
return this;
},
// @method distanceTo(otherPoint: Point): Number
// Returns the cartesian distance between the current and the given points.
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);
},
// @method equals(otherPoint: Point): Boolean
// Returns `true` if the given point has the same coordinates.
equals: function (point) {
point = L.point(point);
return point.x === this.x &&
point.y === this.y;
},
// @method contains(otherPoint: Point): Boolean
// Returns `true` if both coordinates of the given point are less than the corresponding current point coordinates (in absolute values).
contains: function (point) {
point = L.point(point);
return Math.abs(point.x) <= Math.abs(this.x) &&
Math.abs(point.y) <= Math.abs(this.y);
},
// @method toString(): String
// Returns a string representation of the point for debugging purposes.
toString: function () {
return 'Point(' +
L.Util.formatNum(this.x) + ', ' +
L.Util.formatNum(this.y) + ')';
}
};
// @factory L.point(x: Number, y: Number, round?: Boolean)
// Creates a Point object with the given `x` and `y` coordinates. If optional `round` is set to true, rounds the `x` and `y` values.
// @alternative
// @factory L.point(coords: Number[])
// Expects an array of the form `[x, y]` instead.
// @alternative
// @factory L.point(coords: Object)
// Expects a plain object of the form `{x: Number, y: Number}` instead.
L.point = function (x, y, round) {
if (x instanceof L.Point) {
return x;
}
if (L.Util.isArray(x)) {
return new L.Point(x[0], x[1]);
}
if (x === undefined || x === null) {
return x;
}
if (typeof x === 'object' && 'x' in x && 'y' in x) {
return new L.Point(x.x, x.y);
}
return new L.Point(x, y, round);
};
/*
* @class Bounds
* @aka L.Bounds
*
* Represents a rectangular area in pixel coordinates.
*
* @example
*
* ```js
* var p1 = L.point(10, 10),
* p2 = L.point(40, 60),
* bounds = L.bounds(p1, p2);
* ```
*
* All Leaflet methods that accept `Bounds` objects also accept them in a simple Array form (unless noted otherwise), so the bounds example above can be passed like this:
*
* ```js
* otherBounds.intersects([[10, 10], [40, 60]]);
* ```
*/
L.Bounds = function (a, b) {
if (!a) { return; }
var points = b ? [a, b] : a;
for (var i = 0, len = points.length; i < len; i++) {
this.extend(points[i]);
}
};
L.Bounds.prototype = {
// @method extend(point: Point): this
// Extends the bounds to contain the given point.
extend: function (point) { // (Point)
point = L.point(point);
// @property min: Point
// The top left corner of the rectangle.
// @property max: Point
// The bottom right corner of the rectangle.
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;
},
// @method getCenter(round?: Boolean): Point
// Returns the center point of the bounds.
getCenter: function (round) {
return new L.Point(
(this.min.x + this.max.x) / 2,
(this.min.y + this.max.y) / 2, round);
},
// @method getBottomLeft(): Point
// Returns the bottom-left point of the bounds.
getBottomLeft: function () {
return new L.Point(this.min.x, this.max.y);
},
// @method getTopRight(): Point
// Returns the top-right point of the bounds.
getTopRight: function () { // -> Point
return new L.Point(this.max.x, this.min.y);
},
// @method getSize(): Point
// Returns the size of the given bounds
getSize: function () {
return this.max.subtract(this.min);
},
// @method contains(otherBounds: Bounds): Boolean
// Returns `true` if the rectangle contains the given one.
// @alternative
// @method contains(point: Point): Boolean
// Returns `true` if the rectangle contains the given point.
contains: function (obj) {
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);
},
// @method intersects(otherBounds: Bounds): Boolean
// Returns `true` if the rectangle intersects the given bounds. Two bounds
// intersect if they have at least one point in common.
intersects: function (bounds) { // (Bounds) -> Boolean
bounds = L.bounds(bounds);
var min = this.min,
max = this.max,
min2 = bounds.min,
max2 = bounds.max,
xIntersects = (max2.x >= min.x) && (min2.x <= max.x),
yIntersects = (max2.y >= min.y) && (min2.y <= max.y);
return xIntersects && yIntersects;
},
// @method overlaps(otherBounds: Bounds): Boolean
// Returns `true` if the rectangle overlaps the given bounds. Two bounds
// overlap if their intersection is an area.
overlaps: function (bounds) { // (Bounds) -> Boolean
bounds = L.bounds(bounds);
var min = this.min,
max = this.max,
min2 = bounds.min,
max2 = bounds.max,
xOverlaps = (max2.x > min.x) && (min2.x < max.x),
yOverlaps = (max2.y > min.y) && (min2.y < max.y);
return xOverlaps && yOverlaps;
},
isValid: function () {
return !!(this.min && this.max);
}
};
// @factory L.bounds(topLeft: Point, bottomRight: Point)
// Creates a Bounds object from two coordinates (usually top-left and bottom-right corners).
// @alternative
// @factory L.bounds(points: Point[])
// Creates a Bounds object from the points it contains
L.bounds = function (a, b) {
if (!a || a instanceof L.Bounds) {
return a;
}
return new L.Bounds(a, b);
};
/*
* @class Transformation
* @aka L.Transformation
*
* Represents an affine transformation: a set of coefficients `a`, `b`, `c`, `d`
* for transforming a point of a form `(x, y)` into `(a*x + b, c*y + d)` and doing
* the reverse. Used by Leaflet in its projections code.
*
* @example
*
* ```js
* var transformation = new L.Transformation(2, 5, -1, 10),
* p = L.point(1, 2),
* p2 = transformation.transform(p), // L.point(7, 8)
* p3 = transformation.untransform(p2); // L.point(1, 2)
* ```
*/
// factory new L.Transformation(a: Number, b: Number, c: Number, d: Number)
// Creates a `Transformation` object with the given coefficients.
L.Transformation = function (a, b, c, d) {
this._a = a;
this._b = b;
this._c = c;
this._d = d;
};
L.Transformation.prototype = {
// @method transform(point: Point, scale?: Number): Point
// Returns a transformed point, optionally multiplied by the given scale.
// Only accepts real `L.Point` instances, not arrays.
transform: function (point, scale) { // (Point, Number) -> Point
return this._transform(point.clone(), scale);
},
// destructive transform (faster)
_transform: function (point, scale) {
scale = scale || 1;
point.x = scale * (this._a * point.x + this._b);
point.y = scale * (this._c * point.y + this._d);
return point;
},
// @method untransform(point: Point, scale?: Number): Point
// Returns the reverse transformation of the given point, optionally divided
// by the given scale. Only accepts real `L.Point` instances, not arrays.
untransform: function (point, scale) {
scale = scale || 1;
return new L.Point(
(point.x / scale - this._b) / this._a,
(point.y / scale - this._d) / this._c);
}
};
/*
* @namespace DomUtil
*
* Utility functions to work with the [DOM](https://developer.mozilla.org/docs/Web/API/Document_Object_Model)
* tree, used by Leaflet internally.
*
* Most functions expecting or returning a `HTMLElement` also work for
* SVG elements. The only difference is that classes refer to CSS classes
* in HTML and SVG classes in SVG.
*/
L.DomUtil = {
// @function get(id: String|HTMLElement): HTMLElement
// Returns an element given its DOM id, or returns the element itself
// if it was passed directly.
get: function (id) {
return typeof id === 'string' ? document.getElementById(id) : id;
},
// @function getStyle(el: HTMLElement, styleAttrib: String): String
// Returns the value for a certain style attribute on an element,
// including computed values or values set through CSS.
getStyle: function (el, style) {
var value = el.style[style] || (el.currentStyle && el.currentStyle[style]);
if ((!value || value === 'auto') && document.defaultView) {
var css = document.defaultView.getComputedStyle(el, null);
value = css ? css[style] : null;
}
return value === 'auto' ? null : value;
},
// @function create(tagName: String, className?: String, container?: HTMLElement): HTMLElement
// Creates an HTML element with `tagName`, sets its class to `className`, and optionally appends it to `container` element.
create: function (tagName, className, container) {
var el = document.createElement(tagName);
el.className = className || '';
if (container) {
container.appendChild(el);
}
return el;
},
// @function remove(el: HTMLElement)
// Removes `el` from its parent element
remove: function (el) {
var parent = el.parentNode;
if (parent) {
parent.removeChild(el);
}
},
// @function empty(el: HTMLElement)
// Removes all of `el`'s children elements from `el`
empty: function (el) {
while (el.firstChild) {
el.removeChild(el.firstChild);
}
},
// @function toFront(el: HTMLElement)
// Makes `el` the last children of its parent, so it renders in front of the other children.
toFront: function (el) {
el.parentNode.appendChild(el);
},
// @function toBack(el: HTMLElement)
// Makes `el` the first children of its parent, so it renders back from the other children.
toBack: function (el) {
var parent = el.parentNode;
parent.insertBefore(el, parent.firstChild);
},
// @function hasClass(el: HTMLElement, name: String): Boolean
// Returns `true` if the element's class attribute contains `name`.
hasClass: function (el, name) {
if (el.classList !== undefined) {
return el.classList.contains(name);
}
var className = L.DomUtil.getClass(el);
return className.length > 0 && new RegExp('(^|\\s)' + name + '(\\s|$)').test(className);
},
// @function addClass(el: HTMLElement, name: String)
// Adds `name` to the element's class attribute.
addClass: function (el, name) {
if (el.classList !== undefined) {
var classes = L.Util.splitWords(name);
for (var i = 0, len = classes.length; i < len; i++) {
el.classList.add(classes[i]);
}
} else if (!L.DomUtil.hasClass(el, name)) {
var className = L.DomUtil.getClass(el);
L.DomUtil.setClass(el, (className ? className + ' ' : '') + name);
}
},
// @function removeClass(el: HTMLElement, name: String)
// Removes `name` from the element's class attribute.
removeClass: function (el, name) {
if (el.classList !== undefined) {
el.classList.remove(name);
} else {
L.DomUtil.setClass(el, L.Util.trim((' ' + L.DomUtil.getClass(el) + ' ').replace(' ' + name + ' ', ' ')));
}
},
// @function setClass(el: HTMLElement, name: String)
// Sets the element's class.
setClass: function (el, name) {
if (el.className.baseVal === undefined) {
el.className = name;
} else {
// in case of SVG element
el.className.baseVal = name;
}
},
// @function getClass(el: HTMLElement): String
// Returns the element's class.
getClass: function (el) {
return el.className.baseVal === undefined ? el.className : el.className.baseVal;
},
// @function setOpacity(el: HTMLElement, opacity: Number)
// Set the opacity of an element (including old IE support).
// `opacity` must be a number from `0` to `1`.
setOpacity: function (el, value) {
if ('opacity' in el.style) {
el.style.opacity = value;
} else if ('filter' in el.style) {
L.DomUtil._setOpacityIE(el, value);
}
},
_setOpacityIE: function (el, value) {
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) {
// don't set opacity to 1 if we haven't already set an opacity,
// it isn't needed and breaks transparent pngs.
if (value === 1) { return; }
}
value = Math.round(value * 100);
if (filter) {
filter.Enabled = (value !== 100);
filter.Opacity = value;
} else {
el.style.filter += ' progid:' + filterName + '(opacity=' + value + ')';
}
},
// @function testProp(props: String[]): String|false
// Goes through the array of style names and returns the first name
// that is a valid style name for an element. If no such name is found,
// it returns false. Useful for vendor-prefixed styles like `transform`.
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;
},
// @function setTransform(el: HTMLElement, offset: Point, scale?: Number)
// Resets the 3D CSS transform of `el` so it is translated by `offset` pixels
// and optionally scaled by `scale`. Does not have an effect if the
// browser doesn't support 3D CSS transforms.
setTransform: function (el, offset, scale) {
var pos = offset || new L.Point(0, 0);
el.style[L.DomUtil.TRANSFORM] =
(L.Browser.ie3d ?
'translate(' + pos.x + 'px,' + pos.y + 'px)' :
'translate3d(' + pos.x + 'px,' + pos.y + 'px,0)') +
(scale ? ' scale(' + scale + ')' : '');
},
// @function setPosition(el: HTMLElement, position: Point)
// Sets the position of `el` to coordinates specified by `position`,
// using CSS translate or top/left positioning depending on the browser
// (used by Leaflet internally to position its layers).
setPosition: function (el, point) { // (HTMLElement, Point[, Boolean])
/*eslint-disable */
el._leaflet_pos = point;
/*eslint-enable */
if (L.Browser.any3d) {
L.DomUtil.setTransform(el, point);
} else {
el.style.left = point.x + 'px';
el.style.top = point.y + 'px';
}
},
// @function getPosition(el: HTMLElement): Point
// Returns the coordinates of an element previously positioned with setPosition.
getPosition: function (el) {
// this method is only used for elements previously positioned using setPosition,
// so it's safe to cache the position for performance
return el._leaflet_pos || new L.Point(0, 0);
}
};
(function () {
// prefix style property names
// @property TRANSFORM: String
// Vendor-prefixed fransform style name (e.g. `'webkitTransform'` for WebKit).
L.DomUtil.TRANSFORM = L.DomUtil.testProp(
['transform', 'WebkitTransform', 'OTransform', 'MozTransform', 'msTransform']);
// webkitTransition comes first because some browser versions that drop vendor prefix don't do
// the same for the transitionend event, in particular the Android 4.1 stock browser
// @property TRANSITION: String
// Vendor-prefixed transform style name.
var transition = L.DomUtil.TRANSITION = L.DomUtil.testProp(
['webkitTransition', 'transition', 'OTransition', 'MozTransition', 'msTransition']);
L.DomUtil.TRANSITION_END =
transition === 'webkitTransition' || transition === 'OTransition' ? transition + 'End' : 'transitionend';
// @function disableTextSelection()
// Prevents the user from generating `selectstart` DOM events, usually generated
// when the user drags the mouse through a page with text. Used internally
// by Leaflet to override the behaviour of any click-and-drag interaction on
// the map. Affects drag interactions on the whole document.
// @function enableTextSelection()
// Cancels the effects of a previous [`L.DomUtil.disableTextSelection`](#domutil-disabletextselection).
if ('onselectstart' in document) {
L.DomUtil.disableTextSelection = function () {
L.DomEvent.on(window, 'selectstart', L.DomEvent.preventDefault);
};
L.DomUtil.enableTextSelection = function () {
L.DomEvent.off(window, 'selectstart', L.DomEvent.preventDefault);
};
} else {
var userSelectProperty = L.DomUtil.testProp(
['userSelect', 'WebkitUserSelect', 'OUserSelect', 'MozUserSelect', 'msUserSelect']);
L.DomUtil.disableTextSelection = function () {
if (userSelectProperty) {
var style = document.documentElement.style;
this._userSelect = style[userSelectProperty];
style[userSelectProperty] = 'none';
}
};
L.DomUtil.enableTextSelection = function () {
if (userSelectProperty) {
document.documentElement.style[userSelectProperty] = this._userSelect;
delete this._userSelect;
}
};
}
// @function disableImageDrag()
// As [`L.DomUtil.disableTextSelection`](#domutil-disabletextselection), but
// for `dragstart` DOM events, usually generated when the user drags an image.
L.DomUtil.disableImageDrag = function () {
L.DomEvent.on(window, 'dragstart', L.DomEvent.preventDefault);
};
// @function enableImageDrag()
// Cancels the effects of a previous [`L.DomUtil.disableImageDrag`](#domutil-disabletextselection).
L.DomUtil.enableImageDrag = function () {
L.DomEvent.off(window, 'dragstart', L.DomEvent.preventDefault);
};
// @function preventOutline(el: HTMLElement)
// Makes the [outline](https://developer.mozilla.org/docs/Web/CSS/outline)
// of the element `el` invisible. Used internally by Leaflet to prevent
// focusable elements from displaying an outline when the user performs a
// drag interaction on them.
L.DomUtil.preventOutline = function (element) {
while (element.tabIndex === -1) {
element = element.parentNode;
}
if (!element || !element.style) { return; }
L.DomUtil.restoreOutline();
this._outlineElement = element;
this._outlineStyle = element.style.outline;
element.style.outline = 'none';
L.DomEvent.on(window, 'keydown', L.DomUtil.restoreOutline, this);
};
// @function restoreOutline()
// Cancels the effects of a previous [`L.DomUtil.preventOutline`]().
L.DomUtil.restoreOutline = function () {
if (!this._outlineElement) { return; }
this._outlineElement.style.outline = this._outlineStyle;
delete this._outlineElement;
delete this._outlineStyle;
L.DomEvent.off(window, 'keydown', L.DomUtil.restoreOutline, this);
};
})();
/* @class LatLng
* @aka L.LatLng
*
* Represents a geographical point with a certain latitude and longitude.
*
* @example
*
* ```
* var latlng = L.latLng(50.5, 30.5);
* ```
*
* All Leaflet methods that accept LatLng objects also accept them in a simple Array form and simple object form (unless noted otherwise), so these lines are equivalent:
*
* ```
* map.panTo([50, 30]);
* map.panTo({lon: 30, lat: 50});
* map.panTo({lat: 50, lng: 30});
* map.panTo(L.latLng(50, 30));
* ```
*/
L.LatLng = function (lat, lng, alt) {
if (isNaN(lat) || isNaN(lng)) {
throw new Error('Invalid LatLng object: (' + lat + ', ' + lng + ')');
}
// @property lat: Number
// Latitude in degrees
this.lat = +lat;
// @property lng: Number
// Longitude in degrees
this.lng = +lng;
// @property alt: Number
// Altitude in meters (optional)
if (alt !== undefined) {
this.alt = +alt;
}
};
L.LatLng.prototype = {
// @method equals(otherLatLng: LatLng, maxMargin?: Number): Boolean
// Returns `true` if the given `LatLng` point is at the same position (within a small margin of error). The margin of error can be overriden by setting `maxMargin` to a small number.
equals: function (obj, maxMargin) {
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 <= (maxMargin === undefined ? 1.0E-9 : maxMargin);
},
// @method toString(): String
// Returns a string representation of the point (for debugging purposes).
toString: function (precision) {
return 'LatLng(' +
L.Util.formatNum(this.lat, precision) + ', ' +
L.Util.formatNum(this.lng, precision) + ')';
},
// @method distanceTo(otherLatLng: LatLng): Number
// Returns the distance (in meters) to the given `LatLng` calculated using the [Haversine formula](http://en.wikipedia.org/wiki/Haversine_formula).
distanceTo: function (other) {
return L.CRS.Earth.distance(this, L.latLng(other));
},
// @method wrap(): LatLng
// Returns a new `LatLng` object with the longitude wrapped so it's always between -180 and +180 degrees.
wrap: function () {
return L.CRS.Earth.wrapLatLng(this);
},
// @method toBounds(sizeInMeters: Number): LatLngBounds
// Returns a new `LatLngBounds` object in which each boundary is `sizeInMeters` meters apart from the `LatLng`.
toBounds: function (sizeInMeters) {
var latAccuracy = 180 * sizeInMeters / 40075017,
lngAccuracy = latAccuracy / Math.cos((Math.PI / 180) * this.lat);
return L.latLngBounds(
[this.lat - latAccuracy, this.lng - lngAccuracy],
[this.lat + latAccuracy, this.lng + lngAccuracy]);
},
clone: function () {
return new L.LatLng(this.lat, this.lng, this.alt);
}
};
// @factory L.latLng(latitude: Number, longitude: Number, altitude?: Number): LatLng
// Creates an object representing a geographical point with the given latitude and longitude (and optionally altitude).
// @alternative
// @factory L.latLng(coords: Array): LatLng
// Expects an array of the form `[Number, Number]` or `[Number, Number, Number]` instead.
// @alternative
// @factory L.latLng(coords: Object): LatLng
// Expects an plain object of the form `{lat: Number, lng: Number}` or `{lat: Number, lng: Number, alt: Number}` instead.
L.latLng = function (a, b, c) {
if (a instanceof L.LatLng) {
return a;
}
if (L.Util.isArray(a) && typeof a[0] !== 'object') {
if (a.length === 3) {
return new L.LatLng(a[0], a[1], a[2]);
}
if (a.length === 2) {
return new L.LatLng(a[0], a[1]);
}
return null;
}
if (a === undefined || a === null) {
return a;
}
if (typeof a === 'object' && 'lat' in a) {
return new L.LatLng(a.lat, 'lng' in a ? a.lng : a.lon, a.alt);
}
if (b === undefined) {
return null;
}
return new L.LatLng(a, b, c);
};
/*
* @class LatLngBounds
* @aka L.LatLngBounds
*
* Represents a rectangular geographical area on a map.
*
* @example
*
* ```js
* var southWest = L.latLng(40.712, -74.227),
* northEast = L.latLng(40.774, -74.125),
* bounds = L.latLngBounds(southWest, northEast);
* ```
*
* All Leaflet methods that accept LatLngBounds objects also accept them in a simple Array form (unless noted otherwise), so the bounds example above can be passed like this:
*
* ```js
* map.fitBounds([
* [40.712, -74.227],
* [40.774, -74.125]
* ]);
* ```
*/
L.LatLngBounds = 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]);
}
};
L.LatLngBounds.prototype = {
// @method extend(latlng: LatLng): this
// Extend the bounds to contain the given point
// @alternative
// @method extend(otherBounds: LatLngBounds): this
// Extend the bounds to contain the given bounds
extend: function (obj) {
var sw = this._southWest,
ne = this._northEast,
sw2, ne2;
if (obj instanceof L.LatLng) {
sw2 = obj;
ne2 = obj;
} else if (obj instanceof L.LatLngBounds) {
sw2 = obj._southWest;
ne2 = obj._northEast;
if (!sw2 || !ne2) { return this; }
} else {
return obj ? this.extend(L.latLng(obj) || L.latLngBounds(obj)) : this;
}
if (!sw && !ne) {
this._southWest = new L.LatLng(sw2.lat, sw2.lng);
this._northEast = new L.LatLng(ne2.lat, ne2.lng);
} else {
sw.lat = Math.min(sw2.lat, sw.lat);
sw.lng = Math.min(sw2.lng, sw.lng);
ne.lat = Math.max(ne2.lat, ne.lat);
ne.lng = Math.max(ne2.lng, ne.lng);
}
return this;
},
// @method pad(bufferRatio: Number): LatLngBounds
// Returns bigger bounds created by extending the current bounds by a given percentage in each direction.
pad: function (bufferRatio) {
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));
},
// @method getCenter(): LatLng
// Returns the center point of the bounds.
getCenter: function () {
return new L.LatLng(
(this._southWest.lat + this._northEast.lat) / 2,
(this._southWest.lng + this._northEast.lng) / 2);
},
// @method getSouthWest(): LatLng
// Returns the south-west point of the bounds.
getSouthWest: function () {
return this._southWest;
},
// @method getNorthEast(): LatLng
// Returns the north-east point of the bounds.
getNorthEast: function () {
return this._northEast;
},
// @method getNorthWest(): LatLng
// Returns the north-west point of the bounds.
getNorthWest: function () {
return new L.LatLng(this.getNorth(), this.getWest());
},
// @method getSouthEast(): LatLng
// Returns the south-east point of the bounds.
getSouthEast: function () {
return new L.LatLng(this.getSouth(), this.getEast());
},
// @method getWest(): Number
// Returns the west longitude of the bounds
getWest: function () {
return this._southWest.lng;
},
// @method getSouth(): Number
// Returns the south latitude of the bounds
getSouth: function () {
return this._southWest.lat;
},
// @method getEast(): Number
// Returns the east longitude of the bounds
getEast: function () {
return this._northEast.lng;
},
// @method getNorth(): Number
// Returns the north latitude of the bounds
getNorth: function () {
return this._northEast.lat;
},
// @method contains(otherBounds: LatLngBounds): Boolean
// Returns `true` if the rectangle contains the given one.
// @alternative
// @method contains (latlng: LatLng): Boolean
// Returns `true` if the rectangle contains the given point.
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);
},
// @method intersects(otherBounds: LatLngBounds): Boolean
// Returns `true` if the rectangle intersects the given bounds. Two bounds intersect if they have at least one point in common.
intersects: function (bounds) {
bounds = L.latLngBounds(bounds);
var sw = this._southWest,
ne = this._northEast,
sw2 = bounds.getSouthWest(),
ne2 = bounds.getNorthEast(),
latIntersects = (ne2.lat >= sw.lat) && (sw2.lat <= ne.lat),
lngIntersects = (ne2.lng >= sw.lng) && (sw2.lng <= ne.lng);
return latIntersects && lngIntersects;
},
// @method overlaps(otherBounds: Bounds): Boolean
// Returns `true` if the rectangle overlaps the given bounds. Two bounds overlap if their intersection is an area.
overlaps: function (bounds) {
bounds = L.latLngBounds(bounds);
var sw = this._southWest,
ne = this._northEast,
sw2 = bounds.getSouthWest(),
ne2 = bounds.getNorthEast(),
latOverlaps = (ne2.lat > sw.lat) && (sw2.lat < ne.lat),
lngOverlaps = (ne2.lng > sw.lng) && (sw2.lng < ne.lng);
return latOverlaps && lngOverlaps;
},
// @method toBBoxString(): String
// Returns a string with bounding box coordinates in a 'southwest_lng,southwest_lat,northeast_lng,northeast_lat' format. Useful for sending requests to web services that return geo data.
toBBoxString: function () {
return [this.getWest(), this.getSouth(), this.getEast(), this.getNorth()].join(',');
},
// @method equals(otherBounds: LatLngBounds): Boolean
// Returns `true` if the rectangle is equivalent (within a small margin of error) to the given bounds.
equals: function (bounds) {
if (!bounds) { return false; }
bounds = L.latLngBounds(bounds);
return this._southWest.equals(bounds.getSouthWest()) &&
this._northEast.equals(bounds.getNorthEast());
},
// @method isValid(): Boolean
// Returns `true` if the bounds are properly initialized.
isValid: function () {
return !!(this._southWest && this._northEast);
}
};
// TODO International date line?
// @factory L.latLngBounds(southWest: LatLng, northEast: LatLng)
// Creates a `LatLngBounds` object by defining south-west and north-east corners of the rectangle.
// @alternative
// @factory L.latLngBounds(latlngs: LatLng[])
// Creates a `LatLngBounds` object defined by the geographical points it contains. Very useful for zooming the map to fit a particular set of locations with [`fitBounds`](#map-fitbounds).
L.latLngBounds = function (a, b) {
if (a instanceof L.LatLngBounds) {
return a;
}
return new L.LatLngBounds(a, b);
};
/*
* @namespace Projection
* @section
* Leaflet comes with a set of already defined Projections out of the box:
*
* @projection L.Projection.LonLat
*
* Equirectangular, or Plate Carree projection — the most simple projection,
* mostly used by GIS enthusiasts. Directly maps `x` as longitude, and `y` as
* latitude. Also suitable for flat worlds, e.g. game maps. Used by the
* `EPSG:3395` and `Simple` CRS.
*/
L.Projection = {};
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);
},
bounds: L.bounds([-180, -90], [180, 90])
};
/*
* @namespace Projection
* @projection L.Projection.SphericalMercator
*
* Spherical Mercator projection — the most common projection for online maps,
* used by almost all free and commercial tile providers. Assumes that Earth is
* a sphere. Used by the `EPSG:3857` CRS.
*/
L.Projection.SphericalMercator = {
R: 6378137,
MAX_LATITUDE: 85.0511287798,
project: function (latlng) {
var d = Math.PI / 180,
max = this.MAX_LATITUDE,
lat = Math.max(Math.min(max, latlng.lat), -max),
sin = Math.sin(lat * d);
return new L.Point(
this.R * latlng.lng * d,
this.R * Math.log((1 + sin) / (1 - sin)) / 2);
},
unproject: function (point) {
var d = 180 / Math.PI;
return new L.LatLng(
(2 * Math.atan(Math.exp(point.y / this.R)) - (Math.PI / 2)) * d,
point.x * d / this.R);
},
bounds: (function () {
var d = 6378137 * Math.PI;
return L.bounds([-d, -d], [d, d]);
})()
};
/*
* @class CRS
* @aka L.CRS
* Abstract class that defines coordinate reference systems for projecting
* geographical points into pixel (screen) coordinates and back (and to
* coordinates in other units for [WMS](https://en.wikipedia.org/wiki/Web_Map_Service) services). See
* [spatial reference system](http://en.wikipedia.org/wiki/Coordinate_reference_system).
*
* Leaflet defines the most usual CRSs by default. If you want to use a
* CRS not defined by default, take a look at the
* [Proj4Leaflet](https://github.com/kartena/Proj4Leaflet) plugin.
*/
L.CRS = {
// @method latLngToPoint(latlng: LatLng, zoom: Number): Point
// Projects geographical coordinates into pixel coordinates for a given zoom.
latLngToPoint: function (latlng, zoom) {
var projectedPoint = this.projection.project(latlng),
scale = this.scale(zoom);
return this.transformation._transform(projectedPoint, scale);
},
// @method pointToLatLng(point: Point, zoom: Number): LatLng
// The inverse of `latLngToPoint`. Projects pixel coordinates on a given
// zoom into geographical coordinates.
pointToLatLng: function (point, zoom) {
var scale = this.scale(zoom),
untransformedPoint = this.transformation.untransform(point, scale);
return this.projection.unproject(untransformedPoint);
},
// @method project(latlng: LatLng): Point
// Projects geographical coordinates into coordinates in units accepted for
// this CRS (e.g. meters for EPSG:3857, for passing it to WMS services).
project: function (latlng) {
return this.projection.project(latlng);
},
// @method unproject(point: Point): LatLng
// Given a projected coordinate returns the corresponding LatLng.
// The inverse of `project`.
unproject: function (point) {
return this.projection.unproject(point);
},
// @method scale(zoom: Number): Number
// Returns the scale used when transforming projected coordinates into
// pixel coordinates for a particular zoom. For example, it returns
// `256 * 2^zoom` for Mercator-based CRS.
scale: function (zoom) {
return 256 * Math.pow(2, zoom);
},
// @method zoom(scale: Number): Number
// Inverse of `scale()`, returns the zoom level corresponding to a scale
// factor of `scale`.
zoom: function (scale) {
return Math.log(scale / 256) / Math.LN2;
},
// @method getProjectedBounds(zoom: Number): Bounds
// Returns the projection's bounds scaled and transformed for the provided `zoom`.
getProjectedBounds: function (zoom) {
if (this.infinite) { return null; }
var b = this.projection.bounds,
s = this.scale(zoom),
min = this.transformation.transform(b.min, s),
max = this.transformation.transform(b.max, s);
return L.bounds(min, max);
},
// @method distance(latlng1: LatLng, latlng2: LatLng): Number
// Returns the distance between two geographical coordinates.
// @property code: String
// Standard code name of the CRS passed into WMS services (e.g. `'EPSG:3857'`)
//
// @property wrapLng: Number[]
// An array of two numbers defining whether the longitude (horizontal) coordinate
// axis wraps around a given range and how. Defaults to `[-180, 180]` in most
// geographical CRSs. If `undefined`, the longitude axis does not wrap around.
//
// @property wrapLat: Number[]
// Like `wrapLng`, but for the latitude (vertical) axis.
// wrapLng: [min, max],
// wrapLat: [min, max],
// @property infinite: Boolean
// If true, the coordinate space will be unbounded (infinite in both axes)
infinite: false,
// @method wrapLatLng(latlng: LatLng): LatLng
// Returns a `LatLng` where lat and lng has been wrapped according to the
// CRS's `wrapLat` and `wrapLng` properties, if they are outside the CRS's bounds.
wrapLatLng: function (latlng) {
var lng = this.wrapLng ? L.Util.wrapNum(latlng.lng, this.wrapLng, true) : latlng.lng,
lat = this.wrapLat ? L.Util.wrapNum(latlng.lat, this.wrapLat, true) : latlng.lat,
alt = latlng.alt;
return L.latLng(lat, lng, alt);
}
};
/*
* @namespace CRS
* @crs L.CRS.Simple
*
* A simple CRS that maps longitude and latitude into `x` and `y` directly.
* May be used for maps of flat surfaces (e.g. game maps). Note that the `y`
* axis should still be inverted (going from bottom to top). `distance()` returns
* simple euclidean distance.
*/
L.CRS.Simple = L.extend({}, L.CRS, {
projection: L.Projection.LonLat,
transformation: new L.Transformation(1, 0, -1, 0),
scale: function (zoom) {
return Math.pow(2, zoom);
},
zoom: function (scale) {
return Math.log(scale) / Math.LN2;
},
distance: function (latlng1, latlng2) {
var dx = latlng2.lng - latlng1.lng,
dy = latlng2.lat - latlng1.lat;
return Math.sqrt(dx * dx + dy * dy);
},
infinite: true
});
/*
* @namespace CRS
* @crs L.CRS.Earth
*
* Serves as the base for CRS that are global such that they cover the earth.
* Can only be used as the base for other CRS and cannot be used directly,
* since it does not have a `code`, `projection` or `transformation`. `distance()` returns
* meters.
*/
L.CRS.Earth = L.extend({}, L.CRS, {
wrapLng: [-180, 180],
// Mean Earth Radius, as recommended for use by
// the International Union of Geodesy and Geophysics,
// see http://rosettacode.org/wiki/Haversine_formula
R: 6371000,
// distance between two geographical points using spherical law of cosines approximation
distance: function (latlng1, latlng2) {
var rad = Math.PI / 180,
lat1 = latlng1.lat * rad,
lat2 = latlng2.lat * rad,
a = Math.sin(lat1) * Math.sin(lat2) +
Math.cos(lat1) * Math.cos(lat2) * Math.cos((latlng2.lng - latlng1.lng) * rad);
return this.R * Math.acos(Math.min(a, 1));
}
});
/*
* @namespace CRS
* @crs L.CRS.EPSG3857
*
* The most common CRS for online maps, used by almost all free and commercial
* tile providers. Uses Spherical Mercator projection. Set in by default in
* Map's `crs` option.
*/
L.CRS.EPSG3857 = L.extend({}, L.CRS.Earth, {
code: 'EPSG:3857',
projection: L.Projection.SphericalMercator,
transformation: (function () {
var scale = 0.5 / (Math.PI * L.Projection.SphericalMercator.R);
return new L.Transformation(scale, 0.5, -scale, 0.5);
}())
});
L.CRS.EPSG900913 = L.extend({}, L.CRS.EPSG3857, {
code: 'EPSG:900913'
});
/*
* @namespace CRS
* @crs L.CRS.EPSG4326
*
* A common CRS among GIS enthusiasts. Uses simple Equirectangular projection.
*/
L.CRS.EPSG4326 = L.extend({}, L.CRS.Earth, {
code: 'EPSG:4326',
projection: L.Projection.LonLat,
transformation: new L.Transformation(1 / 180, 1, -1 / 180, 0.5)
});
/*
* @class Map
* @aka L.Map
* @inherits Evented
*
* The central class of the API — it is used to create a map on a page and manipulate it.
*
* @example
*
* ```js
* // initialize the map on the "map" div with a given center and zoom
* var map = L.map('map', {
* center: [51.505, -0.09],
* zoom: 13
* });
* ```
*
*/
L.Map = L.Evented.extend({
options: {
// @section Map State Options
// @option crs: CRS = L.CRS.EPSG3857
// The [Coordinate Reference System](#crs) to use. Don't change this if you're not
// sure what it means.
crs: L.CRS.EPSG3857,
// @option center: LatLng = undefined
// Initial geographic center of the map
center: undefined,
// @option zoom: Number = undefined
// Initial map zoom level
zoom: undefined,
// @option minZoom: Number = undefined
// Minimum zoom level of the map. Overrides any `minZoom` option set on map layers.
minZoom: undefined,
// @option maxZoom: Number = undefined
// Maximum zoom level of the map. Overrides any `maxZoom` option set on map layers.
maxZoom: undefined,
// @option layers: Layer[] = []
// Array of layers that will be added to the map initially
layers: [],
// @option maxBounds: LatLngBounds = null
// When this option is set, the map restricts the view to the given
// geographical bounds, bouncing the user back when he tries to pan
// outside the view. To set the restriction dynamically, use
// [`setMaxBounds`](#map-setmaxbounds) method.
maxBounds: undefined,
// @option renderer: Renderer = *
// The default method for drawing vector layers on the map. `L.SVG`
// or `L.Canvas` by default depending on browser support.
renderer: undefined,
// @section Animation Options
// @option fadeAnimation: Boolean = true
// Whether the tile fade animation is enabled. By default it's enabled
// in all browsers that support CSS3 Transitions except Android.
fadeAnimation: true,
// @option markerZoomAnimation: Boolean = true
// Whether markers animate their zoom with the zoom animation, if disabled
// they will disappear for the length of the animation. By default it's
// enabled in all browsers that support CSS3 Transitions except Android.
markerZoomAnimation: true,
// @option transform3DLimit: Number = 2^23
// Defines the maximum size of a CSS translation transform. The default
// value should not be changed unless a web browser positions layers in
// the wrong place after doing a large `panBy`.
transform3DLimit: 8388608, // Precision limit of a 32-bit float
// @section Interaction Options
// @option zoomSnap: Number = 1
// Forces the map's zoom level to always be a multiple of this, particularly
// right after a [`fitBounds()`](#map-fitbounds) or a pinch-zoom.
// By default, the zoom level snaps to the nearest integer; lower values
// (e.g. `0.5` or `0.1`) allow for greater granularity. A value of `0`
// means the zoom level will not be snapped after `fitBounds` or a pinch-zoom.
zoomSnap: 1,
// @option zoomDelta: Number = 1
// Controls how much the map's zoom level will change after a
// [`zoomIn()`](#map-zoomin), [`zoomOut()`](#map-zoomout), pressing `+`
// or `-` on the keyboard, or using the [zoom controls](#control-zoom).
// Values smaller than `1` (e.g. `0.5`) allow for greater granularity.
zoomDelta: 1,
// @option trackResize: Boolean = true
// Whether the map automatically handles browser window resize to update itself.
trackResize: true
},
initialize: function (id, options) { // (HTMLElement or String, Object)
options = L.setOptions(this, options);
this._initContainer(id);
this._initLayout();
// hack for https://github.com/Leaflet/Leaflet/issues/1980
this._onResize = L.bind(this._onResize, this);
this._initEvents();
if (options.maxBounds) {
this.setMaxBounds(options.maxBounds);
}
if (options.zoom !== undefined) {
this._zoom = this._limitZoom(options.zoom);
}
if (options.center && options.zoom !== undefined) {
this.setView(L.latLng(options.center), options.zoom, {reset: true});
}
this._handlers = [];
this._layers = {};
this._zoomBoundLayers = {};
this._sizeChanged = true;
this.callInitHooks();
this._addLayers(this.options.layers);
},
// @section Methods for modifying map state
// @method setView(center: LatLng, zoom: Number, options?: Zoom/pan options): this
// Sets the view of the map (geographical center and zoom) with the given
// animation options.
setView: function (center, zoom) {
// replaced by animation-powered implementation in Map.PanAnimation.js
zoom = zoom === undefined ? this.getZoom() : zoom;
this._resetView(L.latLng(center), zoom);
return this;
},
// @method setZoom(zoom: Number, options: Zoom/pan options): this
// Sets the zoom of the map.
setZoom: function (zoom, options) {
if (!this._loaded) {
this._zoom = zoom;
return this;
}
return this.setView(this.getCenter(), zoom, {zoom: options});
},
// @method zoomIn(delta?: Number, options?: Zoom options): this
// Increases the zoom of the map by `delta` ([`zoomDelta`](#map-zoomdelta) by default).
zoomIn: function (delta, options) {
delta = delta || (L.Browser.any3d ? this.options.zoomDelta : 1);
return this.setZoom(this._zoom + delta, options);
},
// @method zoomOut(delta?: Number, options?: Zoom options): this
// Decreases the zoom of the map by `delta` ([`zoomDelta`](#map-zoomdelta) by default).
zoomOut: function (delta, options) {
delta = delta || (L.Browser.any3d ? this.options.zoomDelta : 1);
return this.setZoom(this._zoom - delta, options);
},
// @method setZoomAround(latlng: LatLng, zoom: Number, options: Zoom options): this
// Zooms the map while keeping a specified geographical point on the map
// stationary (e.g. used internally for scroll zoom and double-click zoom).
// @alternative
// @method setZoomAround(offset: Point, zoom: Number, options: Zoom options): this
// Zooms the map while keeping a specified pixel on the map (relative to the top-left corner) stationary.
setZoomAround: function (latlng, zoom, options) {
var scale = this.getZoomScale(zoom),
viewHalf = this.getSize().divideBy(2),
containerPoint = latlng instanceof L.Point ? latlng : this.latLngToContainerPoint(latlng),
centerOffset = containerPoint.subtract(viewHalf).multiplyBy(1 - 1 / scale),
newCenter = this.containerPointToLatLng(viewHalf.add(centerOffset));
return this.setView(newCenter, zoom, {zoom: options});
},
_getBoundsCenterZoom: function (bounds, options) {
options = options || {};
bounds = bounds.getBounds ? bounds.getBounds() : L.latLngBounds(bounds);
var paddingTL = L.point(options.paddingTopLeft || options.padding || [0, 0]),
paddingBR = L.point(options.paddingBottomRight || options.padding || [0, 0]),
zoom = this.getBoundsZoom(bounds, false, paddingTL.add(paddingBR));
zoom = (typeof options.maxZoom === 'number') ? Math.min(options.maxZoom, zoom) : zoom;
var paddingOffset = paddingBR.subtract(paddingTL).divideBy(2),
swPoint = this.project(bounds.getSouthWest(), zoom),
nePoint = this.project(bounds.getNorthEast(), zoom),
center = this.unproject(swPoint.add(nePoint).divideBy(2).add(paddingOffset), zoom);
return {
center: center,
zoom: zoom
};
},
// @method fitBounds(bounds: LatLngBounds, options: fitBounds options): this
// Sets a map view that contains the given geographical bounds with the
// maximum zoom level possible.
fitBounds: function (bounds, options) {
bounds = L.latLngBounds(bounds);
if (!bounds.isValid()) {
throw new Error('Bounds are not valid.');
}
var target = this._getBoundsCenterZoom(bounds, options);
return this.setView(target.center, target.zoom, options);
},
// @method fitWorld(options?: fitBounds options): this
// Sets a map view that mostly contains the whole world with the maximum
// zoom level possible.
fitWorld: function (options) {
return this.fitBounds([[-90, -180], [90, 180]], options);
},
// @method panTo(latlng: LatLng, options?: Pan options): this
// Pans the map to a given center.
panTo: function (center, options) { // (LatLng)
return this.setView(center, this._zoom, {pan: options});
},
// @method panBy(offset: Point): this
// Pans the map by a given number of pixels (animated).
panBy: function (offset) { // (Point)
// replaced with animated panBy in Map.PanAnimation.js
this.fire('movestart');
this._rawPanBy(L.point(offset));
this.fire('move');
return this.fire('moveend');
},
// @method setMaxBounds(bounds: Bounds): this
// Restricts the map view to the given bounds (see the [maxBounds](#map-maxbounds) option).
setMaxBounds: function (bounds) {
bounds = L.latLngBounds(bounds);
if (!bounds.isValid()) {
this.options.maxBounds = null;
return this.off('moveend', this._panInsideMaxBounds);
} else if (this.options.maxBounds) {
this.off('moveend', this._panInsideMaxBounds);
}
this.options.maxBounds = bounds;
if (this._loaded) {
this._panInsideMaxBounds();
}
return this.on('moveend', this._panInsideMaxBounds);
},
// @method setMinZoom(zoom: Number): this
// Sets the lower limit for the available zoom levels (see the [minZoom](#map-minzoom) option).
setMinZoom: function (zoom) {
this.options.minZoom = zoom;
if (this._loaded && this.getZoom() < this.options.minZoom) {
return this.setZoom(zoom);
}
return this;
},
// @method setMaxZoom(zoom: Number): this
// Sets the upper limit for the available zoom levels (see the [maxZoom](#map-maxzoom) option).
setMaxZoom: function (zoom) {
this.options.maxZoom = zoom;
if (this._loaded && (this.getZoom() > this.options.maxZoom)) {
return this.setZoom(zoom);
}
return this;
},
// @method panInsideBounds(bounds: LatLngBounds, options?: Pan options): this
// Pans the map to the closest view that would lie inside the given bounds (if it's not already), controlling the animation using the options specific, if any.
panInsideBounds: function (bounds, options) {
this._enforcingBounds = true;
var center = this.getCenter(),
newCenter = this._limitCenter(center, this._zoom, L.latLngBounds(bounds));
if (!center.equals(newCenter)) {
this.panTo(newCenter, options);
}
this._enforcingBounds = false;
return this;
},
// @method invalidateSize(options: Zoom/Pan options): this
// Checks if the map container size changed and updates the map if so —
// call it after you've changed the map size dynamically, also animating
// pan by default. If `options.pan` is `false`, panning will not occur.
// If `options.debounceMoveend` is `true`, it will delay `moveend` event so
// that it doesn't happen often even if the method is called many
// times in a row.
// @alternative
// @method invalidateSize(animate: Boolean): this
// Checks if the map container size changed and updates the map if so —
// call it after you've changed the map size dynamically, also animating
// pan by default.
invalidateSize: function (options) {
if (!this._loaded) { return this; }
options = L.extend({
animate: false,
pan: true
}, options === true ? {animate: true} : options);
var oldSize = this.getSize();
this._sizeChanged = true;
this._lastCenter = null;
var newSize = this.getSize(),
oldCenter = oldSize.divideBy(2).round(),
newCenter = newSize.divideBy(2).round(),
offset = oldCenter.subtract(newCenter);
if (!offset.x && !offset.y) { return this; }
if (options.animate && options.pan) {
this.panBy(offset);
} else {
if (options.pan) {
this._rawPanBy(offset);
}
this.fire('move');
if (options.debounceMoveend) {
clearTimeout(this._sizeTimer);
this._sizeTimer = setTimeout(L.bind(this.fire, this, 'moveend'), 200);
} else {
this.fire('moveend');
}
}
// @section Map state change events
// @event resize: ResizeEvent
// Fired when the map is resized.
return this.fire('resize', {
oldSize: oldSize,
newSize: newSize
});
},
// @section Methods for modifying map state
// @method stop(): this
// Stops the currently running `panTo` or `flyTo` animation, if any.
stop: function () {
this.setZoom(this._limitZoom(this._zoom));
if (!this.options.zoomSnap) {
this.fire('viewreset');
}
return this._stop();
},
// TODO handler.addTo
// TODO Appropiate docs section?
// @section Other Methods
// @method addHandler(name: String, HandlerClass: Function): this
// Adds a new `Handler` to the map, given its name and constructor function.
addHandler: function (name, HandlerClass) {
if (!HandlerClass) { return this; }
var handler = this[name] = new HandlerClass(this);
this._handlers.push(handler);
if (this.options[name]) {
handler.enable();
}
return this;
},
// @method remove(): this
// Destroys the map and clears all related event listeners.
remove: function () {
this._initEvents(true);
if (this._containerId !== this._container._leaflet_id) {
throw new Error('Map container is being reused by another instance');
}
try {
// throws error in IE6-8
delete this._container._leaflet_id;
delete this._containerId;
} catch (e) {
/*eslint-disable */
this._container._leaflet_id = undefined;
/*eslint-enable */
this._containerId = undefined;
}
L.DomUtil.remove(this._mapPane);
if (this._clearControlPos) {
this._clearControlPos();
}
this._clearHandlers();
if (this._loaded) {
// @section Map state change events
// @event unload: Event
// Fired when the map is destroyed with [remove](#map-remove) method.
this.fire('unload');
}
for (var i in this._layers) {
this._layers[i].remove();
}
return this;
},
// @section Other Methods
// @method createPane(name: String, container?: HTMLElement): HTMLElement
// Creates a new [map pane](#map-pane) with the given name if it doesn't exist already,
// then returns it. The pane is created as a children of `container`, or
// as a children of the main map pane if not set.
createPane: function (name, container) {
var className = 'leaflet-pane' + (name ? ' leaflet-' + name.replace('Pane', '') + '-pane' : ''),
pane = L.DomUtil.create('div', className, container || this._mapPane);
if (name) {
this._panes[name] = pane;
}
return pane;
},
// @section Methods for Getting Map State
// @method getCenter(): LatLng
// Returns the geographical center of the map view
getCenter: function () {
this._checkIfLoaded();
if (this._lastCenter && !this._moved()) {
return this._lastCenter;
}
return this.layerPointToLatLng(this._getCenterLayerPoint());
},
// @method getZoom(): Number
// Returns the current zoom level of the map view
getZoom: function () {
return this._zoom;
},
// @method getBounds(): LatLngBounds
// Returns the geographical bounds visible in the current map view
getBounds: function () {
var bounds = this.getPixelBounds(),
sw = this.unproject(bounds.getBottomLeft()),
ne = this.unproject(bounds.getTopRight());
return new L.LatLngBounds(sw, ne);
},
// @method getMinZoom(): Number
// Returns the minimum zoom level of the map (if set in the `minZoom` option of the map or of any layers), or `0` by default.
getMinZoom: function () {
return this.options.minZoom === undefined ? this._layersMinZoom || 0 : this.options.minZoom;
},
// @method getMaxZoom(): Number
// Returns the maximum zoom level of the map (if set in the `maxZoom` option of the map or of any layers).
getMaxZoom: function () {
return this.options.maxZoom === undefined ?
(this._layersMaxZoom === undefined ? Infinity : this._layersMaxZoom) :
this.options.maxZoom;
},
// @method getBoundsZoom(bounds: LatLngBounds, inside?: Boolean): Number
// Returns the maximum zoom level on which the given bounds fit to the map
// view in its entirety. If `inside` (optional) is set to `true`, the method
// instead returns the minimum zoom level on which the map view fits into
// the given bounds in its entirety.
getBoundsZoom: function (bounds, inside, padding) { // (LatLngBounds[, Boolean, Point]) -> Number
bounds = L.latLngBounds(bounds);
padding = L.point(padding || [0, 0]);
var zoom = this.getZoom() || 0,
min = this.getMinZoom(),
max = this.getMaxZoom(),
nw = bounds.getNorthWest(),
se = bounds.getSouthEast(),
size = this.getSize().subtract(padding),
boundsSize = this.project(se, zoom).subtract(this.project(nw, zoom)),
snap = L.Browser.any3d ? this.options.zoomSnap : 1;
var scale = Math.min(size.x / boundsSize.x, size.y / boundsSize.y);
zoom = this.getScaleZoom(scale, zoom);
if (snap) {
zoom = Math.round(zoom / (snap / 100)) * (snap / 100); // don't jump if within 1% of a snap level
zoom = inside ? Math.ceil(zoom / snap) * snap : Math.floor(zoom / snap) * snap;
}
return Math.max(min, Math.min(max, zoom));
},
// @method getSize(): Point
// Returns the current size of the map container (in pixels).
getSize: function () {
if (!this._size || this._sizeChanged) {
this._size = new L.Point(
this._container.clientWidth,
this._container.clientHeight);
this._sizeChanged = false;
}
return this._size.clone();
},
// @method getPixelBounds(): Bounds
// Returns the bounds of the current map view in projected pixel
// coordinates (sometimes useful in layer and overlay implementations).
getPixelBounds: function (center, zoom) {
var topLeftPoint = this._getTopLeftPoint(center, zoom);
return new L.Bounds(topLeftPoint, topLeftPoint.add(this.getSize()));
},
// TODO: Check semantics - isn't the pixel origin the 0,0 coord relative to
// the map pane? "left point of the map layer" can be confusing, specially
// since there can be negative offsets.
// @method getPixelOrigin(): Point
// Returns the projected pixel coordinates of the top left point of
// the map layer (useful in custom layer and overlay implementations).
getPixelOrigin: function () {
this._checkIfLoaded();
return this._pixelOrigin;
},
// @method getPixelWorldBounds(zoom?: Number): Bounds
// Returns the world's bounds in pixel coordinates for zoom level `zoom`.
// If `zoom` is omitted, the map's current zoom level is used.
getPixelWorldBounds: function (zoom) {
return this.options.crs.getProjectedBounds(zoom === undefined ? this.getZoom() : zoom);
},
// @section Other Methods
// @method getPane(pane: String|HTMLElement): HTMLElement
// Returns a [map pane](#map-pane), given its name or its HTML element (its identity).
getPane: function (pane) {
return typeof pane === 'string' ? this._panes[pane] : pane;
},
// @method getPanes(): Object
// Returns a plain object containing the names of all [panes](#map-pane) as keys and
// the panes as values.
getPanes: function () {
return this._panes;
},
// @method getContainer: HTMLElement
// Returns the HTML element that contains the map.
getContainer: function () {
return this._container;
},
// @section Conversion Methods
// @method getZoomScale(toZoom: Number, fromZoom: Number): Number
// Returns the scale factor to be applied to a map transition from zoom level
// `fromZoom` to `toZoom`. Used internally to help with zoom animations.
getZoomScale: function (toZoom, fromZoom) {
// TODO replace with universal implementation after refactoring projections
var crs = this.options.crs;
fromZoom = fromZoom === undefined ? this._zoom : fromZoom;
return crs.scale(toZoom) / crs.scale(fromZoom);
},
// @method getScaleZoom(scale: Number, fromZoom: Number): Number
// Returns the zoom level that the map would end up at, if it is at `fromZoom`
// level and everything is scaled by a factor of `scale`. Inverse of
// [`getZoomScale`](#map-getZoomScale).
getScaleZoom: function (scale, fromZoom) {
var crs = this.options.crs;
fromZoom = fromZoom === undefined ? this._zoom : fromZoom;
var zoom = crs.zoom(scale * crs.scale(fromZoom));
return isNaN(zoom) ? Infinity : zoom;
},
// @method project(latlng: LatLng, zoom: Number): Point
// Projects a geographical coordinate `LatLng` according to the projection
// of the map's CRS, then scales it according to `zoom` and the CRS's
// `Transformation`. The result is pixel coordinate relative to
// the CRS origin.
project: function (latlng, zoom) {
zoom = zoom === undefined ? this._zoom : zoom;
return this.options.crs.latLngToPoint(L.latLng(latlng), zoom);
},
// @method unproject(point: Point, zoom: Number): LatLng
// Inverse of [`project`](#map-project).
unproject: function (point, zoom) {
zoom = zoom === undefined ? this._zoom : zoom;
return this.options.crs.pointToLatLng(L.point(point), zoom);
},
// @method layerPointToLatLng(point: Point): LatLng
// Given a pixel coordinate relative to the [origin pixel](#map-getpixelorigin),
// returns the corresponding geographical coordinate (for the current zoom level).
layerPointToLatLng: function (point) {
var projectedPoint = L.point(point).add(this.getPixelOrigin());
return this.unproject(projectedPoint);
},
// @method latLngToLayerPoint(latlng: LatLng): Point
// Given a geographical coordinate, returns the corresponding pixel coordinate
// relative to the [origin pixel](#map-getpixelorigin).
latLngToLayerPoint: function (latlng) {
var projectedPoint = this.project(L.latLng(latlng))._round();
return projectedPoint._subtract(this.getPixelOrigin());
},
// @method wrapLatLng(latlng: LatLng): LatLng
// Returns a `LatLng` where `lat` and `lng` has been wrapped according to the
// map's CRS's `wrapLat` and `wrapLng` properties, if they are outside the
// CRS's bounds.
// By default this means longitude is wrapped around the dateline so its
// value is between -180 and +180 degrees.
wrapLatLng: function (latlng) {
return this.options.crs.wrapLatLng(L.latLng(latlng));
},
// @method distance(latlng1: LatLng, latlng2: LatLng): Number
// Returns the distance between two geographical coordinates according to
// the map's CRS. By default this measures distance in meters.
distance: function (latlng1, latlng2) {
return this.options.crs.distance(L.latLng(latlng1), L.latLng(latlng2));
},
// @method containerPointToLayerPoint(point: Point): Point
// Given a pixel coordinate relative to the map container, returns the corresponding
// pixel coordinate relative to the [origin pixel](#map-getpixelorigin).
containerPointToLayerPoint: function (point) { // (Point)
return L.point(point).subtract(this._getMapPanePos());
},
// @method layerPointToContainerPoint(point: Point): Point
// Given a pixel coordinate relative to the [origin pixel](#map-getpixelorigin),
// returns the corresponding pixel coordinate relative to the map container.
layerPointToContainerPoint: function (point) { // (Point)
return L.point(point).add(this._getMapPanePos());
},
// @method containerPointToLatLng(point: Point): Point
// Given a pixel coordinate relative to the map container, returns
// the corresponding geographical coordinate (for the current zoom level).
containerPointToLatLng: function (point) {
var layerPoint = this.containerPointToLayerPoint(L.point(point));
return this.layerPointToLatLng(layerPoint);
},
// @method latLngToContainerPoint(latlng: LatLng): Point
// Given a geographical coordinate, returns the corresponding pixel coordinate
// relative to the map container.
latLngToContainerPoint: function (latlng) {
return this.layerPointToContainerPoint(this.latLngToLayerPoint(L.latLng(latlng)));
},
// @method mouseEventToContainerPoint(ev: MouseEvent): Point
// Given a MouseEvent object, returns the pixel coordinate relative to the
// map container where the event took place.
mouseEventToContainerPoint: function (e) {
return L.DomEvent.getMousePosition(e, this._container);
},
// @method mouseEventToLayerPoint(ev: MouseEvent): Point
// Given a MouseEvent object, returns the pixel coordinate relative to
// the [origin pixel](#map-getpixelorigin) where the event took place.
mouseEventToLayerPoint: function (e) {
return this.containerPointToLayerPoint(this.mouseEventToContainerPoint(e));
},
// @method mouseEventToLatLng(ev: MouseEvent): LatLng
// Given a MouseEvent object, returns geographical coordinate where the
// event took place.
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) {
throw new Error('Map container not found.');
} else if (container._leaflet_id) {
throw new Error('Map container is already initialized.');
}
L.DomEvent.addListener(container, 'scroll', this._onScroll, this);
this._containerId = L.Util.stamp(container);
},
_initLayout: function () {
var container = this._container;
this._fadeAnimated = this.options.fadeAnimation && L.Browser.any3d;
L.DomUtil.addClass(container, 'leaflet-container' +
(L.Browser.touch ? ' leaflet-touch' : '') +
(L.Browser.retina ? ' leaflet-retina' : '') +
(L.Browser.ielt9 ? ' leaflet-oldie' : '') +
(L.Browser.safari ? ' leaflet-safari' : '') +
(this._fadeAnimated ? ' 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._paneRenderers = {};
// @section
//
// Panes are DOM elements used to control the ordering of layers on the map. You
// can access panes with [`map.getPane`](#map-getpane) or
// [`map.getPanes`](#map-getpanes) methods. New panes can be created with the
// [`map.createPane`](#map-createpane) method.
//
// Every map has the following default panes that differ only in zIndex.
//
// @pane mapPane: HTMLElement = 'auto'
// Pane that contains all other map panes
this._mapPane = this.createPane('mapPane', this._container);
L.DomUtil.setPosition(this._mapPane, new L.Point(0, 0));
// @pane tilePane: HTMLElement = 200
// Pane for `GridLayer`s and `TileLayer`s
this.createPane('tilePane');
// @pane overlayPane: HTMLElement = 400
// Pane for vector overlays (`Path`s), like `Polyline`s and `Polygon`s
this.createPane('shadowPane');
// @pane shadowPane: HTMLElement = 500
// Pane for overlay shadows (e.g. `Marker` shadows)
this.createPane('overlayPane');
// @pane markerPane: HTMLElement = 600
// Pane for `Icon`s of `Marker`s
this.createPane('markerPane');
// @pane tooltipPane: HTMLElement = 650
// Pane for tooltip.
this.createPane('tooltipPane');
// @pane popupPane: HTMLElement = 700
// Pane for `Popup`s.
this.createPane('popupPane');
if (!this.options.markerZoomAnimation) {
L.DomUtil.addClass(panes.markerPane, 'leaflet-zoom-hide');
L.DomUtil.addClass(panes.shadowPane, 'leaflet-zoom-hide');
}
},
// private methods that modify map state
// @section Map state change events
_resetView: function (center, zoom) {
L.DomUtil.setPosition(this._mapPane, new L.Point(0, 0));
var loading = !this._loaded;
this._loaded = true;
zoom = this._limitZoom(zoom);
this.fire('viewprereset');
var zoomChanged = this._zoom !== zoom;
this
._moveStart(zoomChanged)
._move(center, zoom)
._moveEnd(zoomChanged);
// @event viewreset: Event
// Fired when the map needs to redraw its content (this usually happens
// on map zoom or load). Very useful for creating custom overlays.
this.fire('viewreset');
// @event load: Event
// Fired when the map is initialized (when its center and zoom are set
// for the first time).
if (loading) {
this.fire('load');
}
},
_moveStart: function (zoomChanged) {
// @event zoomstart: Event
// Fired when the map zoom is about to change (e.g. before zoom animation).
// @event movestart: Event
// Fired when the view of the map starts changing (e.g. user starts dragging the map).
if (zoomChanged) {
this.fire('zoomstart');
}
return this.fire('movestart');
},
_move: function (center, zoom, data) {
if (zoom === undefined) {
zoom = this._zoom;
}
var zoomChanged = this._zoom !== zoom;
this._zoom = zoom;
this._lastCenter = center;
this._pixelOrigin = this._getNewPixelOrigin(center);
// @event zoom: Event
// Fired repeatedly during any change in zoom level, including zoom
// and fly animations.
if (zoomChanged || (data && data.pinch)) { // Always fire 'zoom' if pinching because #3530
this.fire('zoom', data);
}
// @event move: Event
// Fired repeatedly during any movement of the map, including pan and
// fly animations.
return this.fire('move', data);
},
_moveEnd: function (zoomChanged) {
// @event zoomend: Event
// Fired when the map has changed, after any animations.
if (zoomChanged) {
this.fire('zoomend');
}
// @event moveend: Event
// Fired when the center of the map stops changing (e.g. user stopped
// dragging the map).
return this.fire('moveend');
},
_stop: function () {
L.Util.cancelAnimFrame(this._flyToFrame);
if (this._panAnim) {
this._panAnim.stop();
}
return this;
},
_rawPanBy: function (offset) {
L.DomUtil.setPosition(this._mapPane, this._getMapPanePos().subtract(offset));
},
_getZoomSpan: function () {
return this.getMaxZoom() - this.getMinZoom();
},
_panInsideMaxBounds: function () {
if (!this._enforcingBounds) {
this.panInsideBounds(this.options.maxBounds);
}
},
_checkIfLoaded: function () {
if (!this._loaded) {
throw new Error('Set map center and zoom first.');
}
},
// DOM event handling
// @section Interaction events
_initEvents: function (remove) {
if (!L.DomEvent) { return; }
this._targets = {};
this._targets[L.stamp(this._container)] = this;
var onOff = remove ? 'off' : 'on';
// @event click: MouseEvent
// Fired when the user clicks (or taps) the map.
// @event dblclick: MouseEvent
// Fired when the user double-clicks (or double-taps) the map.
// @event mousedown: MouseEvent
// Fired when the user pushes the mouse button on the map.
// @event mouseup: MouseEvent
// Fired when the user releases the mouse button on the map.
// @event mouseover: MouseEvent
// Fired when the mouse enters the map.
// @event mouseout: MouseEvent
// Fired when the mouse leaves the map.
// @event mousemove: MouseEvent
// Fired while the mouse moves over the map.
// @event contextmenu: MouseEvent
// Fired when the user pushes the right mouse button on the map, prevents
// default browser context menu from showing if there are listeners on
// this event. Also fired on mobile when the user holds a single touch
// for a second (also called long press).
// @event keypress: KeyboardEvent
// Fired when the user presses a key from the keyboard while the map is focused.
L.DomEvent[onOff](this._container, 'click dblclick mousedown mouseup ' +
'mouseover mouseout mousemove contextmenu keypress', this._handleDOMEvent, this);
if (this.options.trackResize) {
L.DomEvent[onOff](window, 'resize', this._onResize, this);
}
if (L.Browser.any3d && this.options.transform3DLimit) {
this[onOff]('moveend', this._onMoveEnd);
}
},
_onResize: function () {
L.Util.cancelAnimFrame(this._resizeRequest);
this._resizeRequest = L.Util.requestAnimFrame(
function () { this.invalidateSize({debounceMoveend: true}); }, this);
},
_onScroll: function () {
this._container.scrollTop = 0;
this._container.scrollLeft = 0;
},
_onMoveEnd: function () {
var pos = this._getMapPanePos();
if (Math.max(Math.abs(pos.x), Math.abs(pos.y)) >= this.options.transform3DLimit) {
// https://bugzilla.mozilla.org/show_bug.cgi?id=1203873 but Webkit also have
// a pixel offset on very high values, see: http://jsfiddle.net/dg6r5hhb/
this._resetView(this.getCenter(), this.getZoom());
}
},
_findEventTargets: function (e, type) {
var targets = [],
target,
isHover = type === 'mouseout' || type === 'mouseover',
src = e.target || e.srcElement,
dragging = false;
while (src) {
target = this._targets[L.stamp(src)];
if (target && (type === 'click' || type === 'preclick') && !e._simulated && this._draggableMoved(target)) {
// Prevent firing click after you just dragged an object.
dragging = true;
break;
}
if (target && target.listens(type, true)) {
if (isHover && !L.DomEvent._isExternalTarget(src, e)) { break; }
targets.push(target);
if (isHover) { break; }
}
if (src === this._container) { break; }
src = src.parentNode;
}
if (!targets.length && !dragging && !isHover && L.DomEvent._isExternalTarget(src, e)) {
targets = [this];
}
return targets;
},
_handleDOMEvent: function (e) {
if (!this._loaded || L.DomEvent._skipped(e)) { return; }
var type = e.type === 'keypress' && e.keyCode === 13 ? 'click' : e.type;
if (type === 'mousedown') {
// prevents outline when clicking on keyboard-focusable element
L.DomUtil.preventOutline(e.target || e.srcElement);
}
this._fireDOMEvent(e, type);
},
_fireDOMEvent: function (e, type, targets) {
if (e.type === 'click') {
// Fire a synthetic 'preclick' event which propagates up (mainly for closing popups).
// @event preclick: MouseEvent
// Fired before mouse click on the map (sometimes useful when you
// want something to happen on click before any existing click
// handlers start running).
var synth = L.Util.extend({}, e);
synth.type = 'preclick';
this._fireDOMEvent(synth, synth.type, targets);
}
if (e._stopped) { return; }
// Find the layer the event is propagating from and its parents.
targets = (targets || []).concat(this._findEventTargets(e, type));
if (!targets.length) { return; }
var target = targets[0];
if (type === 'contextmenu' && target.listens(type, true)) {
L.DomEvent.preventDefault(e);
}
var data = {
originalEvent: e
};
if (e.type !== 'keypress') {
var isMarker = target instanceof L.Marker;
data.containerPoint = isMarker ?
this.latLngToContainerPoint(target.getLatLng()) : this.mouseEventToContainerPoint(e);
data.layerPoint = this.containerPointToLayerPoint(data.containerPoint);
data.latlng = isMarker ? target.getLatLng() : this.layerPointToLatLng(data.layerPoint);
}
for (var i = 0; i < targets.length; i++) {
targets[i].fire(type, data, true);
if (data.originalEvent._stopped ||
(targets[i].options.nonBubblingEvents && L.Util.indexOf(targets[i].options.nonBubblingEvents, type) !== -1)) { return; }
}
},
_draggableMoved: function (obj) {
obj = obj.dragging && obj.dragging.enabled() ? obj : this;
return (obj.dragging && obj.dragging.moved()) || (this.boxZoom && this.boxZoom.moved());
},
_clearHandlers: function () {
for (var i = 0, len = this._handlers.length; i < len; i++) {
this._handlers[i].disable();
}
},
// @section Other Methods
// @method whenReady(fn: Function, context?: Object): this
// Runs the given function `fn` when the map gets initialized with
// a view (center and zoom) and at least one layer, or immediately
// if it's already initialized, optionally passing a function context.
whenReady: function (callback, context) {
if (this._loaded) {
callback.call(context || this, {target: this});
} else {
this.on('load', callback, context);
}
return this;
},
// private methods for getting map state
_getMapPanePos: function () {
return L.DomUtil.getPosition(this._mapPane) || new L.Point(0, 0);
},
_moved: function () {
var pos = this._getMapPanePos();
return pos && !pos.equals([0, 0]);
},
_getTopLeftPoint: function (center, zoom) {
var pixelOrigin = center && zoom !== undefined ?
this._getNewPixelOrigin(center, zoom) :
this.getPixelOrigin();
return pixelOrigin.subtract(this._getMapPanePos());
},
_getNewPixelOrigin: function (center, zoom) {
var viewHalf = this.getSize()._divideBy(2);
return this.project(center, zoom)._subtract(viewHalf)._add(this._getMapPanePos())._round();
},
_latLngToNewLayerPoint: function (latlng, zoom, center) {
var topLeft = this._getNewPixelOrigin(center, zoom);
return this.project(latlng, zoom)._subtract(topLeft);
},
// layer point of the current center
_getCenterLayerPoint: function () {
return this.containerPointToLayerPoint(this.getSize()._divideBy(2));
},
// offset of the specified place to the current center in pixels
_getCenterOffset: function (latlng) {
return this.latLngToLayerPoint(latlng).subtract(this._getCenterLayerPoint());
},
// adjust center for view to get inside bounds
_limitCenter: function (center, zoom, bounds) {
if (!bounds) { return center; }
var centerPoint = this.project(center, zoom),
viewHalf = this.getSize().divideBy(2),
viewBounds = new L.Bounds(centerPoint.subtract(viewHalf), centerPoint.add(viewHalf)),
offset = this._getBoundsOffset(viewBounds, bounds, zoom);
// If offset is less than a pixel, ignore.
// This prevents unstable projections from getting into
// an infinite loop of tiny offsets.
if (offset.round().equals([0, 0])) {
return center;
}
return this.unproject(centerPoint.add(offset), zoom);
},
// adjust offset for view to get inside bounds
_limitOffset: function (offset, bounds) {
if (!bounds) { return offset; }
var viewBounds = this.getPixelBounds(),
newBounds = new L.Bounds(viewBounds.min.add(offset), viewBounds.max.add(offset));
return offset.add(this._getBoundsOffset(newBounds, bounds));
},
// returns offset needed for pxBounds to get inside maxBounds at a specified zoom
_getBoundsOffset: function (pxBounds, maxBounds, zoom) {
var projectedMaxBounds = L.bounds(
this.project(maxBounds.getNorthEast(), zoom),
this.project(maxBounds.getSouthWest(), zoom)
),
minOffset = projectedMaxBounds.min.subtract(pxBounds.min),
maxOffset = projectedMaxBounds.max.subtract(pxBounds.max),
dx = this._rebound(minOffset.x, -maxOffset.x),
dy = this._rebound(minOffset.y, -maxOffset.y);
return new L.Point(dx, dy);
},
_rebound: function (left, right) {
return left + right > 0 ?
Math.round(left - right) / 2 :
Math.max(0, Math.ceil(left)) - Math.max(0, Math.floor(right));
},
_limitZoom: function (zoom) {
var min = this.getMinZoom(),
max = this.getMaxZoom(),
snap = L.Browser.any3d ? this.options.zoomSnap : 1;
if (snap) {
zoom = Math.round(zoom / snap) * snap;
}
return Math.max(min, Math.min(max, zoom));
}
});
// @section
// @factory L.map(id: String, options?: Map options)
// Instantiates a map object given the DOM ID of a `
` element
// and optionally an object literal with `Map options`.
//
// @alternative
// @factory L.map(el: HTMLElement, options?: Map options)
// Instantiates a map object given an instance of a `
` HTML element
// and optionally an object literal with `Map options`.
L.map = function (id, options) {
return new L.Map(id, options);
};
/*
* @class Layer
* @inherits Evented
* @aka L.Layer
* @aka ILayer
*
* A set of methods from the Layer base class that all Leaflet layers use.
* Inherits all methods, options and events from `L.Evented`.
*
* @example
*
* ```js
* var layer = L.Marker(latlng).addTo(map);
* layer.addTo(map);
* layer.remove();
* ```
*
* @event add: Event
* Fired after the layer is added to a map
*
* @event remove: Event
* Fired after the layer is removed from a map
*/
L.Layer = L.Evented.extend({
// Classes extending `L.Layer` will inherit the following options:
options: {
// @option pane: String = 'overlayPane'
// By default the layer will be added to the map's [overlay pane](#map-overlaypane). Overriding this option will cause the layer to be placed on another pane by default.
pane: 'overlayPane',
nonBubblingEvents: [] // Array of events that should not be bubbled to DOM parents (like the map)
},
/* @section
* Classes extending `L.Layer` will inherit the following methods:
*
* @method addTo(map: Map): this
* Adds the layer to the given map
*/
addTo: function (map) {
map.addLayer(this);
return this;
},
// @method remove: this
// Removes the layer from the map it is currently active on.
remove: function () {
return this.removeFrom(this._map || this._mapToAdd);
},
// @method removeFrom(map: Map): this
// Removes the layer from the given map
removeFrom: function (obj) {
if (obj) {
obj.removeLayer(this);
}
return this;
},
// @method getPane(name? : String): HTMLElement
// Returns the `HTMLElement` representing the named pane on the map. If `name` is omitted, returns the pane for this layer.
getPane: function (name) {
return this._map.getPane(name ? (this.options[name] || name) : this.options.pane);
},
addInteractiveTarget: function (targetEl) {
this._map._targets[L.stamp(targetEl)] = this;
return this;
},
removeInteractiveTarget: function (targetEl) {
delete this._map._targets[L.stamp(targetEl)];
return this;
},
_layerAdd: function (e) {
var map = e.target;
// check in case layer gets added and then removed before the map is ready
if (!map.hasLayer(this)) { return; }
this._map = map;
this._zoomAnimated = map._zoomAnimated;
if (this.getEvents) {
var events = this.getEvents();
map.on(events, this);
this.once('remove', function () {
map.off(events, this);
}, this);
}
this.onAdd(map);
if (this.getAttribution && this._map.attributionControl) {
this._map.attributionControl.addAttribution(this.getAttribution());
}
this.fire('add');
map.fire('layeradd', {layer: this});
}
});
/* @section Extension methods
* @uninheritable
*
* Every layer should extend from `L.Layer` and (re-)implement the following methods.
*
* @method onAdd(map: Map): this
* Should contain code that creates DOM elements for the layer, adds them to `map panes` where they should belong and puts listeners on relevant map events. Called on [`map.addLayer(layer)`](#map-addlayer).
*
* @method onRemove(map: Map): this
* Should contain all clean up code that removes the layer's elements from the DOM and removes listeners previously added in [`onAdd`](#layer-onadd). Called on [`map.removeLayer(layer)`](#map-removelayer).
*
* @method getEvents(): Object
* This optional method should return an object like `{ viewreset: this._reset }` for [`addEventListener`](#evented-addeventlistener). The event handlers in this object will be automatically added and removed from the map with your layer.
*
* @method getAttribution(): String
* This optional method should return a string containing HTML to be shown on the `Attribution control` whenever the layer is visible.
*
* @method beforeAdd(map: Map): this
* Optional method. Called on [`map.addLayer(layer)`](#map-addlayer), before the layer is added to the map, before events are initialized, without waiting until the map is in a usable state. Use for early initialization only.
*/
/* @namespace Map
* @section Layer events
*
* @event layeradd: LayerEvent
* Fired when a new layer is added to the map.
*
* @event layerremove: LayerEvent
* Fired when some layer is removed from the map
*
* @section Methods for Layers and Controls
*/
L.Map.include({
// @method addLayer(layer: Layer): this
// Adds the given layer to the map
addLayer: function (layer) {
var id = L.stamp(layer);
if (this._layers[id]) { return this; }
this._layers[id] = layer;
layer._mapToAdd = this;
if (layer.beforeAdd) {
layer.beforeAdd(this);
}
this.whenReady(layer._layerAdd, layer);
return this;
},
// @method removeLayer(layer: Layer): this
// Removes the given layer from the map.
removeLayer: function (layer) {
var id = L.stamp(layer);
if (!this._layers[id]) { return this; }
if (this._loaded) {
layer.onRemove(this);
}
if (layer.getAttribution && this.attributionControl) {
this.attributionControl.removeAttribution(layer.getAttribution());
}
delete this._layers[id];
if (this._loaded) {
this.fire('layerremove', {layer: layer});
layer.fire('remove');
}
layer._map = layer._mapToAdd = null;
return this;
},
// @method hasLayer(layer: Layer): Boolean
// Returns `true` if the given layer is currently added to the map
hasLayer: function (layer) {
return !!layer && (L.stamp(layer) in this._layers);
},
/* @method eachLayer(fn: Function, context?: Object): this
* Iterates over the layers of the map, optionally specifying context of the iterator function.
* ```
* map.eachLayer(function(layer){
* layer.bindPopup('Hello');
* });
* ```
*/
eachLayer: function (method, context) {
for (var i in this._layers) {
method.call(context, this._layers[i]);
}
return this;
},
_addLayers: function (layers) {
layers = layers ? (L.Util.isArray(layers) ? layers : [layers]) : [];
for (var i = 0, len = layers.length; i < len; i++) {
this.addLayer(layers[i]);
}
},
_addZoomLimit: function (layer) {
if (isNaN(layer.options.maxZoom) || !isNaN(layer.options.minZoom)) {
this._zoomBoundLayers[L.stamp(layer)] = layer;
this._updateZoomLevels();
}
},
_removeZoomLimit: function (layer) {
var id = L.stamp(layer);
if (this._zoomBoundLayers[id]) {
delete this._zoomBoundLayers[id];
this._updateZoomLevels();
}
},
_updateZoomLevels: function () {
var minZoom = Infinity,
maxZoom = -Infinity,
oldZoomSpan = this._getZoomSpan();
for (var i in this._zoomBoundLayers) {
var options = this._zoomBoundLayers[i].options;
minZoom = options.minZoom === undefined ? minZoom : Math.min(minZoom, options.minZoom);
maxZoom = options.maxZoom === undefined ? maxZoom : Math.max(maxZoom, options.maxZoom);
}
this._layersMaxZoom = maxZoom === -Infinity ? undefined : maxZoom;
this._layersMinZoom = minZoom === Infinity ? undefined : minZoom;
// @section Map state change events
// @event zoomlevelschange: Event
// Fired when the number of zoomlevels on the map is changed due
// to adding or removing a layer.
if (oldZoomSpan !== this._getZoomSpan()) {
this.fire('zoomlevelschange');
}
}
});
/*
* @namespace Projection
* @projection L.Projection.Mercator
*
* Elliptical Mercator projection — more complex than Spherical Mercator. Takes into account that Earth is a geoid, not a perfect sphere. Used by the EPSG:3395 CRS.
*/
L.Projection.Mercator = {
R: 6378137,
R_MINOR: 6356752.314245179,
bounds: L.bounds([-20037508.34279, -15496570.73972], [20037508.34279, 18764656.23138]),
project: function (latlng) {
var d = Math.PI / 180,
r = this.R,
y = latlng.lat * d,
tmp = this.R_MINOR / r,
e = Math.sqrt(1 - tmp * tmp),
con = e * Math.sin(y);
var ts = Math.tan(Math.PI / 4 - y / 2) / Math.pow((1 - con) / (1 + con), e / 2);
y = -r * Math.log(Math.max(ts, 1E-10));
return new L.Point(latlng.lng * d * r, y);
},
unproject: function (point) {
var d = 180 / Math.PI,
r = this.R,
tmp = this.R_MINOR / r,
e = Math.sqrt(1 - tmp * tmp),
ts = Math.exp(-point.y / r),
phi = Math.PI / 2 - 2 * Math.atan(ts);
for (var i = 0, dphi = 0.1, con; i < 15 && Math.abs(dphi) > 1e-7; i++) {
con = e * Math.sin(phi);
con = Math.pow((1 - con) / (1 + con), e / 2);
dphi = Math.PI / 2 - 2 * Math.atan(ts * con) - phi;
phi += dphi;
}
return new L.LatLng(phi * d, point.x * d / r);
}
};
/*
* @namespace CRS
* @crs L.CRS.EPSG3395
*
* Rarely used by some commercial tile providers. Uses Elliptical Mercator projection.
*/
L.CRS.EPSG3395 = L.extend({}, L.CRS.Earth, {
code: 'EPSG:3395',
projection: L.Projection.Mercator,
transformation: (function () {
var scale = 0.5 / (Math.PI * L.Projection.Mercator.R);
return new L.Transformation(scale, 0.5, -scale, 0.5);
}())
});
/*
* @class GridLayer
* @inherits Layer
* @aka L.GridLayer
*
* Generic class for handling a tiled grid of HTML elements. This is the base class for all tile layers and replaces `TileLayer.Canvas`.
* GridLayer can be extended to create a tiled grid of HTML elements like `
