adlayer-library/src/node_modules/events.js

Adlayer javascript core library

/**
* @module events
*/
var events = {};

/**
* Implementation minimized of node Event Emitter
*
* @class EventEmitter
* @constructor
*/
var EventEmitter = function(){
	/**
	* Storage of events
	*
	* @attribute listeners
	* @type object
	* @private
	*/
	var listeners = {
		load:[],
		click:[],
		readyStateChange:[]
	};
	
	/**
	* @method listeners
	* @param {String} event Name of event
	* @return {Array}
	*/
	this.listeners = function(event){
		return listeners[event];
	};
	
	/**
	* @method addListener
	* @param {String} event Name of event
	* @param {Function} fn Eventhandler
	* @return {Array}
	*/
	this.addListener = function(event,fn){
		if(!listeners[event]){
			listeners[event] = [];
		}
		listeners[event].push(fn);
		return listeners[event];
	};
	
	/**
	* Shortcut for addListener
	*
	* @method on
	* @param {String} event Name of event
	* @param {Function} fn Eventhandler
	* @return {Array}
	*/
	this.on = function(event, fn){
		return this.addListener(event,fn);
	};
	
	/**
	* Trigger the event
	*
	* @method emit
	* @param {String} event Name of event
	* @return {Array}
	*/
	this.emit = function(event){
		var eventListeners = listeners[event];
		if(eventListeners && (eventListeners.length > 0)){
			var i = 0;
			for(i; i < eventListeners.length; i++){
				eventListeners[i].call();
			}
			return eventListeners;
		}
	};
};
events.EventEmitter = EventEmitter;
exports.events = events;