FM / core

/opt/canhelp/node_modules/leaflet/src/core/

/opt/canhelp/node_modules/leaflet/src/core

Name	Size	Mode	Actions
Browser.js	8054	0644	edit dl rm
Class.js	3584	0644	edit dl rm
Class.leafdoc	4758	0644	edit dl rm
Events.js	9864	0644	edit dl rm
Events.leafdoc	4690	0644	edit dl rm
Handler.js	1455	0644	edit dl rm
index.js	346	0644	edit dl rm
Util.js	9013	0644	edit dl rm

Edit: /opt/canhelp/node_modules/leaflet/src/core/Events.js (9864B)

import {Class} from './Class';
import * as Util from './Util';

/*
 * @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);
 * ```
 */

export var Events = {
	/* @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 = 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. This includes implicitly attached events.
	 */
	off: function (types, fn, context) {

if (!arguments.length) {
			// 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 = Util.splitWords(types);

return this;
	},

// attach listener (without syntactic sugar now)
	_on: function (type, fn, context, _once) {
		if (typeof fn !== 'function') {
			console.warn('wrong listener type: ' + typeof fn);
			return;
		}

// check if fn already there
		if (this._listens(type, fn, context) !== false) {
			return;
		}

if (context === this) {
			// Less memory footprint.
			context = undefined;
		}

var newListener = {fn: fn, ctx: context};
		if (_once) {
			newListener.once = true;
		}

this._events = this._events || {};
		this._events[type] = this._events[type] || [];
		this._events[type].push(newListener);
	},

_off: function (type, fn, context) {
		var listeners,
		    i,
		    len;

if (!this._events) {
			return;
		}

listeners = this._events[type];
		if (!listeners) {
			return;
		}

if (arguments.length === 1) { // remove all
			if (this._firingCount) {
				// 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 = Util.falseFn;
				}
			}
			// clear all listeners for a type if function isn't specified
			delete this._events[type];
			return;
		}

if (typeof fn !== 'function') {
			console.warn('wrong listener type: ' + typeof fn);
			return;
		}

// find fn and remove it
		var index = this._listens(type, fn, context);
		if (index !== false) {
			var listener = listeners[index];
			if (this._firingCount) {
				// set the removed listener to noop so that's not called if remove happens in fire
				listener.fn = Util.falseFn;

/* copy array in case events are being fired */
				this._events[type] = listeners = listeners.slice();
			}
			listeners.splice(index, 1);
		}
	},

// @method fire(type: String, data?: Object, propagate?: Boolean): this
	// Fires an event of the specified type. You can optionally provide a data
	// object — the first argument of the listener function will contain its
	// properties. The event can optionally be propagated to event parents.
	fire: function (type, data, propagate) {
		if (!this.listens(type, propagate)) { return this; }

var event = Util.extend({}, data, {
			type: type,
			target: this,
			sourceTarget: data && data.sourceTarget || 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];
					// off overwrites l.fn, so we need to copy fn to a var
					var fn = l.fn;
					if (l.once) {
						this.off(type, fn, l.ctx);
					}
					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, propagate?: Boolean): Boolean
	// @method listens(type: String, fn: Function, context?: Object, propagate?: Boolean): Boolean
	// Returns `true` if a particular event type has any listeners attached to it.
	// The verification can optionally be propagated, it will return `true` if parents have the listener attached to it.
	listens: function (type, fn, context, propagate) {
		if (typeof type !== 'string') {
			console.warn('"string" type argument expected');
		}

// we don't overwrite the input `fn` value, because we need to use it for propagation
		var _fn = fn;
		if (typeof fn !== 'function') {
			propagate = !!fn;
			_fn = undefined;
			context = undefined;
		}

var listeners = this._events && this._events[type];
		if (listeners && listeners.length) {
			if (this._listens(type, _fn, context) !== false) {
				return true;
			}
		}

if (propagate) {
			// also check parents for listeners if event propagates
			for (var id in this._eventParents) {
				if (this._eventParents[id].listens(type, fn, context, propagate)) { return true; }
			}
		}
		return false;
	},

// returns the index (number) or false
	_listens: function (type, fn, context) {
		if (!this._events) {
			return false;
		}

var listeners = this._events[type] || [];
		if (!fn) {
			return !!listeners.length;
		}

if (context === this) {
			// Less memory footprint.
			context = undefined;
		}

for (var i = 0, len = listeners.length; i < len; i++) {
			if (listeners[i].fn === fn && listeners[i].ctx === context) {
				return i;
			}
		}
		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) {

} else {
			// types can be a string of space-separated words
			types = Util.splitWords(types);

for (var i = 0, len = types.length; i < len; i++) {
				this._on(types[i], fn, context, true);
			}
		}

return this;
	},

// @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[Util.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[Util.stamp(obj)];
		}
		return this;
	},

_propagateEvent: function (e) {
		for (var id in this._eventParents) {
			this._eventParents[id].fire(e.type, Util.extend({
				layer: e.target,
				propagatedFrom: e.target
			}, e), true);
		}
	}
};

// aliases; we should ditch those eventually

// @method addEventListener(…): this
// Alias to [`on(…)`](#evented-on)
Events.addEventListener = Events.on;

// @method removeEventListener(…): this
// Alias to [`off(…)`](#evented-off)

// @method clearAllEventListeners(…): this
// Alias to [`off()`](#evented-off)
Events.removeEventListener = Events.clearAllEventListeners = Events.off;

// @method addOneTimeEventListener(…): this
// Alias to [`once(…)`](#evented-once)
Events.addOneTimeEventListener = Events.once;

// @method fireEvent(…): this
// Alias to [`fire(…)`](#evented-fire)
Events.fireEvent = Events.fire;

// @method hasEventListeners(…): Boolean
// Alias to [`listens(…)`](#evented-listens)
Events.hasEventListeners = Events.listens;

export var Evented = Class.extend(Events);

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