Fix closure compile after https://codereview.chromium.org/1212653010/
[chromium-blink-merge.git] / ui / file_manager / audio_player / js / background.js
blob600c15b9f113e09329c57a177e0c994cfbe9754b
1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 /**
6  * Icon of the audio player.
7  * TODO(yoshiki): Consider providing an exact size icon, instead of relying
8  * on downsampling by ash.
9  *
10  * @type {string}
11  * @const
12  */
13 var AUDIO_PLAYER_ICON = 'icons/audio-player-64.png';
15 var AUDIO_PLAYER_APP_URL = 'audio_player.html';
17 /**
18  * Configuration of the audio player panel.
19  * @type {Object}
20  */
21 var audioPlayerCreateOptions = {
22   id: 'audio-player',
23   type: 'panel',
24   minHeight: 44 + 73,  // 44px: track, 73px: controller
25   minWidth: 292,
26   height: 44 + 73,  // collapsed
27   width: 292
30 /**
31  * @constructor
32  * @extends {BackgroundBase}
33  */
34 function AudioPlayerBackground() {
35   BackgroundBase.call(this);
38 AudioPlayerBackground.prototype.__proto__ = BackgroundBase.prototype;
40 /**
41  * Called when an app is restarted.
42  */
43 AudioPlayerBackground.prototype.onRestarted_ = function() {
44   audioPlayer.reopen(function() {
45     // If the audioPlayer is reopened, change its window's icon. Otherwise
46     // there is no reopened window so just skip the call of setIcon.
47     if (audioPlayer.rawAppWindow)
48       audioPlayer.setIcon(AUDIO_PLAYER_ICON);
49   });
53 /**
54  * Backgound object. This is necessary for AppWindowWrapper.
55  * @type {BackgroundBase}
56  */
57 var background = new AudioPlayerBackground();
59 /**
60  * Wrapper of audio player window.
61  * @type {SingletonAppWindowWrapper}
62  */
63 var audioPlayer = new SingletonAppWindowWrapper(AUDIO_PLAYER_APP_URL,
64                                                 audioPlayerCreateOptions);
66 /**
67  * Opens player window.
68  * @param {!Array<string>} urls List of audios to play and index to start
69  *     playing.
70  * @return {!Promise} Promise to be fulfilled on success, or rejected on error.
71  */
72 function open(urls) {
73   var position = 0;
74   var startUrl = (position < urls.length) ? urls[position] : '';
76   return new Promise(function(fulfill, reject) {
77     if (urls.length === 0) {
78       reject('No file to open.');
79       return;
80     }
82     // Gets the current list of the children of the parent.
83     window.webkitResolveLocalFileSystemURL(urls[0], function(fileEntry) {
84       fileEntry.getParent(function(parentEntry) {
85         var dirReader = parentEntry.createReader();
86         var entries = [];
88         // Call the reader.readEntries() until no more results are returned.
89         var readEntries = function() {
90            dirReader.readEntries(function(results) {
91             if (!results.length) {
92               fulfill(entries.sort(util.compareName));
93             } else {
94               entries = entries.concat(Array.prototype.slice.call(results, 0));
95               readEntries();
96             }
97           }, reject);
98         };
100         // Start reading.
101         readEntries();
102       }, reject);
103     }, reject);
104   }).then(function(entries) {
105     // Omits non-audio files.
106     var audioEntries = entries.filter(FileType.isAudio);
108     // Adjusts the position to start playing.
109     var maybePosition = util.entriesToURLs(audioEntries).indexOf(startUrl);
110     if (maybePosition !== -1)
111       position = maybePosition;
113     // Opens the audio player panel.
114     return new Promise(function(fulfill, reject) {
115       var urls = util.entriesToURLs(audioEntries);
116       audioPlayer.launch({items: urls, position: position},
117                          false,
118                          fulfill.bind(null, null));
119     });
120   }).then(function() {
121     audioPlayer.setIcon(AUDIO_PLAYER_ICON);
122     audioPlayer.rawAppWindow.focus();
123     return AUDIO_PLAYER_APP_URL;
124   }).catch(function(error) {
125     console.error('Launch failed' + error.stack || error);
126     return Promise.reject(error);
127   });
130 background.setLaunchHandler(open);