Index: chrome/browser/resources/shared/js/event_tracker.js |
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--- chrome/browser/resources/shared/js/event_tracker.js (revision 177292) |
+++ chrome/browser/resources/shared/js/event_tracker.js (working copy) |
@@ -1,97 +0,0 @@ |
-// Copyright (c) 2011 The Chromium Authors. All rights reserved. |
-// Use of this source code is governed by a BSD-style license that can be |
-// found in the LICENSE file. |
- |
-/** @fileoverview EventTracker is a simple class that manages the addition and |
- * removal of DOM event listeners. In particular, it keeps track of all |
- * listeners that have been added and makes it easy to remove some or all of |
- * them without requiring all the information again. This is particularly |
- * handy when the listener is a generated function such as a lambda or the |
- * result of calling Function.bind. |
- */ |
- |
-// Use an anonymous function to enable strict mode just for this file (which |
-// will be concatenated with other files when embedded in Chrome) |
-var EventTracker = (function() { |
- 'use strict'; |
- |
- /** |
- * Create an EventTracker to track a set of events. |
- * EventTracker instances are typically tied 1:1 with other objects or |
- * DOM elements whose listeners should be removed when the object is disposed |
- * or the corresponding elements are removed from the DOM. |
- * @constructor |
- */ |
- function EventTracker() { |
- /** |
- * @type {Array.<EventTracker.Entry>} |
- * @private |
- */ |
- this.listeners_ = []; |
- } |
- |
- /** |
- * The type of the internal tracking entry. |
- * @typedef {{node: !Node, |
- * eventType: string, |
- * listener: Function, |
- * capture: boolean}} |
- */ |
- EventTracker.Entry; |
- |
- EventTracker.prototype = { |
- /** |
- * Add an event listener - replacement for Node.addEventListener. |
- * @param {!Node} node The DOM node to add a listener to. |
- * @param {string} eventType The type of event to subscribe to. |
- * @param {Function} listener The listener to add. |
- * @param {boolean} capture Whether to invoke during the capture phase. |
- */ |
- add: function(node, eventType, listener, capture) { |
- var h = { |
- node: node, |
- eventType: eventType, |
- listener: listener, |
- capture: capture |
- }; |
- this.listeners_.push(h); |
- node.addEventListener(eventType, listener, capture); |
- }, |
- |
- /** |
- * Remove any specified event listeners added with this EventTracker. |
- * @param {!Node} node The DOM node to remove a listener from. |
- * @param {?string} eventType The type of event to remove. |
- */ |
- remove: function(node, eventType) { |
- this.listeners_ = this.listeners_.filter(function(h) { |
- if (h.node == node && (!eventType || (h.eventType == eventType))) { |
- EventTracker.removeEventListener_(h); |
- return false; |
- } |
- return true; |
- }); |
- }, |
- |
- /** |
- * Remove all event listeners added with this EventTracker. |
- */ |
- removeAll: function() { |
- this.listeners_.forEach(EventTracker.removeEventListener_); |
- this.listeners_ = []; |
- } |
- }; |
- |
- /** |
- * Remove a single event listener given it's tracker entry. It's up to the |
- * caller to ensure the entry is removed from listeners_. |
- * @param {EventTracker.Entry} h The entry describing the listener to remove. |
- * @private |
- */ |
- EventTracker.removeEventListener_ = function(h) { |
- h.node.removeEventListener(h.eventType, h.listener, h.capture); |
- }; |
- |
- return EventTracker; |
-})(); |
- |