| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 2015 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. |
| --> |
| |
| <link rel="import" href="/tracing/base/base.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.ui.tracks', function() { |
| |
| /** |
| * ContainerToTrackMap is a class to handle building and accessing a map |
| * between an EventContainer's stableId and its handling track. |
| * |
| * @constructor |
| */ |
| function ContainerToTrackMap() { |
| this.stableIdToTrackMap_ = {}; |
| } |
| |
| ContainerToTrackMap.prototype = { |
| addContainer: function(container, track) { |
| if (!track) |
| throw new Error('Must provide a track.'); |
| this.stableIdToTrackMap_[container.stableId] = track; |
| }, |
| |
| clear: function() { |
| this.stableIdToTrackMap_ = {}; |
| }, |
| |
| getTrackByStableId: function(stableId) { |
| return this.stableIdToTrackMap_[stableId]; |
| } |
| }; |
| |
| return { |
| ContainerToTrackMap: ContainerToTrackMap |
| }; |
| }); |
| </script> |
