chrome/browser/resources/chromeos/wallpaper_manager/js/event_page.js

   1 // Copyright (c) 2013 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.
   4
   5 var WALLPAPER_PICKER_WIDTH = 574;
   6 var WALLPAPER_PICKER_HEIGHT = 420;
   7
   8 var wallpaperPickerWindow;
   9
  10 var surpriseWallpaper = null;
  11
  12 function SurpriseWallpaper() {
  13 }
  14
  15 /**
  16  * Gets SurpriseWallpaper instance. In case it hasn't been initialized, a new
  17  * instance is created.
  18  * @return {SurpriseWallpaper} A SurpriseWallpaper instance.
  19  */
  20 SurpriseWallpaper.getInstance = function() {
  21   if (!surpriseWallpaper)
  22     surpriseWallpaper = new SurpriseWallpaper();
  23   return surpriseWallpaper;
  24 };
  25
  26 /**
  27  * Tries to change wallpaper to a new one in the background. May fail due to a
  28  * network issue.
  29  */
  30 SurpriseWallpaper.prototype.tryChangeWallpaper = function() {
  31   var self = this;
  32   var onFailure = function(status) {
  33     if (status != 404)
  34       self.fallbackToLocalRss_();
  35     else
  36       self.updateRandomWallpaper_();
  37   };
  38   // Try to fetch newest rss as document from server first. If the requested
  39   // URL is not found (404 error), set a random wallpaper displayed in the
  40   // wallpaper picker. If any other error occurs, proceed with local copy of
  41   // rss.
  42   WallpaperUtil.fetchURL(Constants.WallpaperRssURL, 'document', function(xhr) {
  43     WallpaperUtil.saveToLocalStorage(Constants.AccessLocalRssKey,
  44         new XMLSerializer().serializeToString(xhr.responseXML));
  45     self.updateSurpriseWallpaper(xhr.responseXML);
  46   }, onFailure);
  47 };
  48
  49 /**
  50  * Retries changing the wallpaper 1 hour later. This is called when fetching the
  51  * rss or wallpaper from server fails.
  52  * @private
  53  */
  54 SurpriseWallpaper.prototype.retryLater_ = function() {
  55   chrome.alarms.create('RetryAlarm', {delayInMinutes: 60});
  56 };
  57
  58 /**
  59  * Fetches the cached rss feed from local storage in the event of being unable
  60  * to download the online feed.
  61  * @private
  62  */
  63 SurpriseWallpaper.prototype.fallbackToLocalRss_ = function() {
  64   var self = this;
  65   Constants.WallpaperLocalStorage.get(Constants.AccessLocalRssKey,
  66       function(items) {
  67     var rssString = items[Constants.AccessLocalRssKey];
  68     if (rssString) {
  69       self.updateSurpriseWallpaper(new DOMParser().parseFromString(rssString,
  70                                                                    'text/xml'));
  71     } else {
  72       self.updateSurpriseWallpaper();
  73     }
  74   });
  75 };
  76
  77 /**
  78  * Starts to change wallpaper. Called after rss is fetched.
  79  * @param {Document=} opt_rss The fetched rss document. If opt_rss is null, uses
  80  *     a random wallpaper.
  81  */
  82 SurpriseWallpaper.prototype.updateSurpriseWallpaper = function(opt_rss) {
  83   if (opt_rss) {
  84     var items = opt_rss.querySelectorAll('item');
  85     var date = new Date(new Date().toDateString()).getTime();
  86     for (var i = 0; i < items.length; i++) {
  87       item = items[i];
  88       var disableDate = new Date(item.getElementsByTagNameNS(
  89           Constants.WallpaperNameSpaceURI, 'disableDate')[0].textContent).
  90               getTime();
  91       var enableDate = new Date(item.getElementsByTagNameNS(
  92           Constants.WallpaperNameSpaceURI, 'enableDate')[0].textContent).
  93               getTime();
  94       var regionsString = item.getElementsByTagNameNS(
  95           Constants.WallpaperNameSpaceURI, 'regions')[0].textContent;
  96       var regions = regionsString.split(', ');
  97       if (enableDate <= date && disableDate > date &&
  98           regions.indexOf(navigator.language) != -1) {
  99         var self = this;
 100         this.setWallpaperFromRssItem_(item,
 101                                       function() {},
 102                                       function(status) {
 103                                         if (status != 404)
 104                                           self.retryLater_();
 105                                         else
 106                                           self.updateRandomWallpaper_();
 107                                       });
 108         return;
 109       }
 110     }
 111   }
 112   // No surprise wallpaper for today at current locale or fetching rss feed
 113   // fails. Fallback to use a random one from wallpaper server.
 114   this.updateRandomWallpaper_();
 115 };
 116
 117 /**
 118  * Sets a new random wallpaper if one has not already been set today.
 119  * @private
 120  */
 121 SurpriseWallpaper.prototype.updateRandomWallpaper_ = function() {
 122   var self = this;
 123   var onSuccess = function(items) {
 124     var dateString = new Date().toDateString();
 125     // At most one random wallpaper per day.
 126     if (items[Constants.AccessLastSurpriseWallpaperChangedDate] != dateString) {
 127       self.setRandomWallpaper_(dateString);
 128     }
 129   };
 130   WallpaperUtil.enabledSyncThemesCallback(function(syncEnabled) {
 131     if (syncEnabled) {
 132       Constants.WallpaperSyncStorage.get(
 133           Constants.AccessLastSurpriseWallpaperChangedDate, onSuccess);
 134     } else {
 135       Constants.WallpaperLocalStorage.get(
 136           Constants.AccessLastSurpriseWallpaperChangedDate, onSuccess);
 137     }
 138   });
 139 };
 140
 141 /**
 142  * Sets wallpaper to one of the wallpapers displayed in wallpaper picker. If
 143  * the wallpaper download fails, retry one hour later. Wallpapers that are
 144  * disabled for surprise me are excluded.
 145  * @param {string} dateString String representation of current local date.
 146  * @private
 147  */
 148 SurpriseWallpaper.prototype.setRandomWallpaper_ = function(dateString) {
 149   var self = this;
 150   Constants.WallpaperLocalStorage.get(Constants.AccessLocalManifestKey,
 151                                       function(items) {
 152     var manifest = items[Constants.AccessLocalManifestKey];
 153     if (manifest && manifest.wallpaper_list) {
 154       var filtered = manifest.wallpaper_list.filter(function(element) {
 155         // Older version manifest do not have available_for_surprise_me field.
 156         // In this case, no wallpaper should be filtered out.
 157         return element.available_for_surprise_me ||
 158             element.available_for_surprise_me == undefined;
 159       });
 160       var index = Math.floor(Math.random() * filtered.length);
 161       var wallpaper = filtered[index];
 162       var wallpaperURL = wallpaper.base_url + Constants.HighResolutionSuffix;
 163       var onSuccess = function() {
 164         WallpaperUtil.saveWallpaperInfo(wallpaperURL, wallpaper.default_layout,
 165             Constants.WallpaperSourceEnum.Online);
 166         WallpaperUtil.saveToLocalStorage(
 167             Constants.AccessLastSurpriseWallpaperChangedDate,
 168             dateString, function() {
 169               WallpaperUtil.saveToSyncStorage(
 170                 Constants.AccessLastSurpriseWallpaperChangedDate,
 171                 dateString);
 172             });
 173       };
 174       WallpaperUtil.setOnlineWallpaper(wallpaperURL, wallpaper.default_layout,
 175           onSuccess, self.retryLater_.bind(self));
 176     }
 177   });
 178 };
 179
 180 /**
 181  * Sets wallpaper to the wallpaper specified by item from rss. If downloading
 182  * the wallpaper fails, retry one hour later.
 183  * @param {Element} item The wallpaper rss item element.
 184  * @param {function} onSuccess Success callback.
 185  * @param {function} onFailure Failure callback.
 186  * @private
 187  */
 188 SurpriseWallpaper.prototype.setWallpaperFromRssItem_ = function(item,
 189                                                                 onSuccess,
 190                                                                 onFailure) {
 191   var url = item.querySelector('link').textContent;
 192   var layout = item.getElementsByTagNameNS(
 193         Constants.WallpaperNameSpaceURI, 'layout')[0].textContent;
 194   var self = this;
 195   WallpaperUtil.fetchURL(url, 'arraybuffer', function(xhr) {
 196     if (xhr.response != null) {
 197       chrome.wallpaperPrivate.setCustomWallpaper(xhr.response, layout, false,
 198                                                  'surprise_wallpaper',
 199                                                  onSuccess);
 200       WallpaperUtil.saveWallpaperInfo(url, layout,
 201                                       Constants.WallpaperSourceEnum.Online);
 202       var dateString = new Date().toDateString();
 203       WallpaperUtil.saveToLocalStorage(
 204           Constants.AccessLastSurpriseWallpaperChangedDate,
 205           dateString, function() {
 206             WallpaperUtil.saveToSyncStorage(
 207               Constants.AccessLastSurpriseWallpaperChangedDate, dataString);
 208           });
 209     } else {
 210       self.updateRandomWallpaper_();
 211     }
 212   }, onFailure);
 213 };
 214
 215 /**
 216  * Disables the wallpaper surprise me feature. Clear all alarms and states.
 217  */
 218 SurpriseWallpaper.prototype.disable = function() {
 219   chrome.alarms.clearAll();
 220   // Makes last changed date invalid.
 221   WallpaperUtil.saveToLocalStorage(
 222       Constants.AccessLastSurpriseWallpaperChangedDate, '', function() {
 223     WallpaperUtil.saveToSyncStorage(
 224       Constants.AccessLastSurpriseWallpaperChangedDate, '');
 225   });
 226 };
 227
 228 /**
 229  * Changes current wallpaper and sets up an alarm to schedule next change around
 230  * midnight.
 231  */
 232 SurpriseWallpaper.prototype.next = function() {
 233   var nextUpdate = this.nextUpdateTime(new Date());
 234   chrome.alarms.create({when: nextUpdate});
 235   this.tryChangeWallpaper();
 236 };
 237
 238 /**
 239  * Calculates when the next wallpaper change should be triggered.
 240  * @param {Date} now Current time.
 241  * @return {number} The time when next wallpaper change should happen.
 242  */
 243 SurpriseWallpaper.prototype.nextUpdateTime = function(now) {
 244   var nextUpdate = new Date(now.setDate(now.getDate() + 1)).toDateString();
 245   return new Date(nextUpdate).getTime();
 246 };
 247
 248 chrome.app.runtime.onLaunched.addListener(function() {
 249   if (wallpaperPickerWindow && !wallpaperPickerWindow.contentWindow.closed) {
 250     wallpaperPickerWindow.focus();
 251     chrome.wallpaperPrivate.minimizeInactiveWindows();
 252     return;
 253   }
 254
 255   chrome.app.window.create('main.html', {
 256     frame: 'none',
 257     width: WALLPAPER_PICKER_WIDTH,
 258     height: WALLPAPER_PICKER_HEIGHT,
 259     resizable: false,
 260     alphaEnabled: true
 261   }, function(w) {
 262     wallpaperPickerWindow = w;
 263     chrome.wallpaperPrivate.minimizeInactiveWindows();
 264     w.onClosed.addListener(function() {
 265       chrome.wallpaperPrivate.restoreMinimizedWindows();
 266     });
 267     WallpaperUtil.testSendMessage('wallpaper-window-created');
 268   });
 269 });
 270
 271 chrome.syncFileSystem.onFileStatusChanged.addListener(function(detail) {
 272   WallpaperUtil.enabledSyncThemesCallback(function(syncEnabled) {
 273     if (!syncEnabled)
 274       return;
 275     if (detail.status == 'synced') {
 276       if (detail.direction == 'remote_to_local') {
 277         if (detail.action == 'added') {
 278           Constants.WallpaperLocalStorage.get(
 279               Constants.AccessLocalWallpaperInfoKey,
 280               function(items) {
 281                 var localData = items[Constants.AccessLocalWallpaperInfoKey];
 282                 if (localData && localData.url == detail.fileEntry.name &&
 283                     localData.source == Constants.WallpaperSourceEnum.Custom) {
 284                   WallpaperUtil.setCustomWallpaperFromSyncFS(localData.url,
 285                                                              localData.layout);
 286                 } else if (!localData || localData.url !=
 287                            detail.fileEntry.name.replace(
 288                                Constants.CustomWallpaperThumbnailSuffix, '')) {
 289                   // localData might be null on a powerwashed device.
 290                   WallpaperUtil.storeWallpaperFromSyncFSToLocalFS(
 291                       detail.fileEntry);
 292                 }
 293              });
 294         } else if (detail.action == 'deleted') {
 295           var fileName = detail.fileEntry.name.replace(
 296               Constants.CustomWallpaperThumbnailSuffix, '');
 297           WallpaperUtil.deleteWallpaperFromLocalFS(fileName);
 298         }
 299       } else {  // detail.direction == 'local_to_remote'
 300         if (detail.action == 'deleted') {
 301           WallpaperUtil.deleteWallpaperFromSyncFS(detail.fileEntry.name);
 302           WallpaperUtil.deleteWallpaperFromLocalFS(detail.fileEntry.name);
 303         }
 304       }
 305     }
 306   });
 307 });
 308
 309 chrome.storage.onChanged.addListener(function(changes, namespace) {
 310   WallpaperUtil.enabledSyncThemesCallback(function(syncEnabled) {
 311     if (syncEnabled) {
 312       // If sync theme is enabled, use values from chrome.storage.sync to sync
 313       // wallpaper changes.
 314       WallpaperUtil.requestSyncFS(function() {});
 315       if (changes[Constants.AccessSyncSurpriseMeEnabledKey]) {
 316         if (changes[Constants.AccessSyncSurpriseMeEnabledKey].newValue) {
 317           SurpriseWallpaper.getInstance().next();
 318         } else {
 319           SurpriseWallpaper.getInstance().disable();
 320         }
 321       }
 322
 323       if (changes[Constants.AccessSyncWallpaperInfoKey]) {
 324         var syncInfo = changes[Constants.AccessSyncWallpaperInfoKey].newValue;
 325
 326         Constants.WallpaperSyncStorage.get(
 327             Constants.AccessSyncSurpriseMeEnabledKey, function(enabledItems) {
 328           var syncSurpriseMeEnabled =
 329               enabledItems[Constants.AccessSyncSurpriseMeEnabledKey];
 330
 331           Constants.WallpaperSyncStorage.get(
 332               Constants.AccessLastSurpriseWallpaperChangedDate,
 333               function(items) {
 334             var syncLastSurpriseMeChangedDate =
 335                 items[Constants.AccessLastSurpriseWallpaperChangedDate];
 336
 337             var today = new Date().toDateString();
 338             // If SurpriseMe is enabled and surprise wallpaper hasn't been
 339             // changed today, we should not sync the change, instead onAlarm()
 340             // will be triggered to update a surprise me wallpaper.
 341             if (!syncSurpriseMeEnabled ||
 342                 (syncSurpriseMeEnabled &&
 343                  syncLastSurpriseMeChangedDate == today)) {
 344               Constants.WallpaperLocalStorage.get(
 345                   Constants.AccessLocalWallpaperInfoKey, function(infoItems) {
 346                 var localInfo =
 347                     infoItems[Constants.AccessLocalWallpaperInfoKey];
 348                 // Normally, the wallpaper info saved in local storage and sync
 349                 // storage are the same. If the synced value changed by sync
 350                 // service, they may different. In that case, change wallpaper
 351                 // to the one saved in sync storage and update the local value.
 352                 if (localInfo == undefined ||
 353                     localInfo.url != syncInfo.url ||
 354                     localInfo.layout != syncInfo.layout ||
 355                     localInfo.source != syncInfo.source) {
 356                   if (syncInfo.source == Constants.WallpaperSourceEnum.Online) {
 357                     // TODO(bshe): Consider schedule an alarm to set online
 358                     // wallpaper later when failed. Note that we need to cancel
 359                     // the retry if user set another wallpaper before retry
 360                     // alarm invoked.
 361                     WallpaperUtil.setOnlineWallpaper(syncInfo.url,
 362                         syncInfo.layout, function() {}, function() {});
 363                   } else if (syncInfo.source ==
 364                              Constants.WallpaperSourceEnum.Custom) {
 365                     WallpaperUtil.setCustomWallpaperFromSyncFS(syncInfo.url,
 366                                                                syncInfo.layout);
 367                   } else if (syncInfo.source ==
 368                               Constants.WallpaperSourceEnum.Default) {
 369                     chrome.wallpaperPrivate.resetWallpaper();
 370                   }
 371                   WallpaperUtil.saveToLocalStorage(
 372                       Constants.AccessLocalWallpaperInfoKey, syncInfo);
 373                 }
 374               });
 375             }
 376           });
 377         });
 378       }
 379     } else {
 380       // If sync theme is disabled, use values from chrome.storage.local to
 381       // track wallpaper changes.
 382       if (changes[Constants.AccessLocalSurpriseMeEnabledKey]) {
 383         if (changes[Constants.AccessLocalSurpriseMeEnabledKey].newValue) {
 384           SurpriseWallpaper.getInstance().next();
 385         } else {
 386           SurpriseWallpaper.getInstance().disable();
 387         }
 388       }
 389     }
 390   });
 391 });
 392
 393 chrome.alarms.onAlarm.addListener(function() {
 394   SurpriseWallpaper.getInstance().next();
 395 });
 396
 397 chrome.wallpaperPrivate.onWallpaperChangedBy3rdParty.addListener(function() {
 398   WallpaperUtil.saveToLocalStorage(
 399       Constants.AccessLocalSurpriseMeEnabledKey, false, function() {
 400     WallpaperUtil.saveToSyncStorage(Constants.AccessSyncSurpriseMeEnabledKey,
 401                                     false);
 402   });
 403   SurpriseWallpaper.getInstance().disable();
 404 });