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| 1 /* |
| 2 * This file is part of Adblock Plus <http://adblockplus.org/>, |
| 3 * Copyright (C) 2006-2014 Eyeo GmbH |
| 4 * |
| 5 * Adblock Plus is free software: you can redistribute it and/or modify |
| 6 * it under the terms of the GNU General Public License version 3 as |
| 7 * published by the Free Software Foundation. |
| 8 * |
| 9 * Adblock Plus is distributed in the hope that it will be useful, |
| 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 * GNU General Public License for more details. |
| 13 * |
| 14 * You should have received a copy of the GNU General Public License |
| 15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. |
| 16 */ |
| 17 |
| 18 |
| 19 (function() |
| 20 { |
| 21 window.ext = {}; |
| 22 |
| 23 var EventTarget = ext._EventTarget = function(cancelable) |
| 24 { |
| 25 this._listeners = []; |
| 26 this._cancelable = cancelable; |
| 27 }; |
| 28 EventTarget.prototype = { |
| 29 addListener: function(listener) |
| 30 { |
| 31 if (this._listeners.indexOf(listener) == -1) |
| 32 this._listeners.push(listener); |
| 33 }, |
| 34 removeListener: function(listener) |
| 35 { |
| 36 var idx = this._listeners.indexOf(listener); |
| 37 if (idx != -1) |
| 38 this._listeners.splice(idx, 1); |
| 39 }, |
| 40 _dispatch: function() |
| 41 { |
| 42 var result = null; |
| 43 |
| 44 for (var i = 0; i < this._listeners.length; i++) |
| 45 { |
| 46 result = this._listeners[i].apply(null, arguments); |
| 47 |
| 48 if (this._cancelable && result === false) |
| 49 break; |
| 50 } |
| 51 |
| 52 return result; |
| 53 } |
| 54 }; |
| 55 })(); |
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