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/*
* ***** BEGIN LICENSE BLOCK *****
* Copyright (c) 2011-2012 VMware, Inc.
*
* For the license see COPYING.
* ***** END LICENSE BLOCK *****
*/
/* Simplified implementation of DOM2 EventTarget.
* http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget
*/
var REventTarget = function() {};
REventTarget.prototype.addEventListener = function (eventType, listener) {
if(!this._listeners) {
this._listeners = {};
}
if(!(eventType in this._listeners)) {
this._listeners[eventType] = [];
}
var arr = this._listeners[eventType];
if(utils.arrIndexOf(arr, listener) === -1) {
arr.push(listener);
}
return;
};
REventTarget.prototype.removeEventListener = function (eventType, listener) {
if(!(this._listeners && (eventType in this._listeners))) {
return;
}
var arr = this._listeners[eventType];
var idx = utils.arrIndexOf(arr, listener);
if (idx !== -1) {
if(arr.length > 1) {
this._listeners[eventType] = arr.slice(0, idx).concat( arr.slice(idx+1) );
} else {
delete this._listeners[eventType];
}
return;
}
return;
};
REventTarget.prototype.dispatchEvent = function (event) {
var t = event.type;
var args = Array.prototype.slice.call(arguments, 0);
if (this['on'+t]) {
this['on'+t].apply(this, args);
}
if (this._listeners && t in this._listeners) {
for(var i=0; i < this._listeners[t].length; i++) {
this._listeners[t][i].apply(this, args);
}
}
};
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