chrome/browser/resources/file_manager/foreground/js/drive_banners.js

   1 // Copyright (c) 2012 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 'use strict';
   6
   7 /**
   8  * Responsible for showing following banners in the file list.
   9  *  - WelcomeBanner
  10  *  - AuthFailBanner
  11  * @param {DirectoryModel} directoryModel The model.
  12  * @param {VolumeManagerWrapper} volumeManager The manager.
  13  * @param {DOMDocument} document HTML document.
  14  * @param {boolean} showOffers True if we should show offer banners.
  15  * @constructor
  16  */
  17 function FileListBannerController(
  18     directoryModel, volumeManager, document, showOffers) {
  19   this.directoryModel_ = directoryModel;
  20   this.volumeManager_ = volumeManager;
  21   this.document_ = document;
  22   this.showOffers_ = showOffers;
  23   this.driveEnabled_ = false;
  24
  25   this.initializeWelcomeBanner_();
  26   this.privateOnDirectoryChangedBound_ =
  27       this.privateOnDirectoryChanged_.bind(this);
  28
  29   var handler = this.checkSpaceAndMaybeShowWelcomeBanner_.bind(this);
  30   this.directoryModel_.addEventListener('scan-completed', handler);
  31   this.directoryModel_.addEventListener('rescan-completed', handler);
  32   this.directoryModel_.addEventListener('directory-changed',
  33       this.onDirectoryChanged_.bind(this));
  34
  35   this.unmountedPanel_ = this.document_.querySelector('#unmounted-panel');
  36   this.volumeManager_.volumeInfoList.addEventListener(
  37       'splice', this.onVolumeInfoListSplice_.bind(this));
  38   this.volumeManager_.addEventListener('drive-connection-changed',
  39       this.onDriveConnectionChanged_.bind(this));
  40
  41   chrome.storage.onChanged.addListener(this.onStorageChange_.bind(this));
  42   this.welcomeHeaderCounter_ = WELCOME_HEADER_COUNTER_LIMIT;
  43   this.warningDismissedCounter_ = 0;
  44   chrome.storage.local.get([WELCOME_HEADER_COUNTER_KEY, WARNING_DISMISSED_KEY],
  45                          function(values) {
  46     this.welcomeHeaderCounter_ =
  47         parseInt(values[WELCOME_HEADER_COUNTER_KEY]) || 0;
  48     this.warningDismissedCounter_ =
  49         parseInt(values[WARNING_DISMISSED_KEY]) || 0;
  50   }.bind(this));
  51
  52   this.authFailedBanner_ =
  53       this.document_.querySelector('#drive-auth-failed-warning');
  54   var authFailedText = this.authFailedBanner_.querySelector('.drive-text');
  55   authFailedText.innerHTML = util.htmlUnescape(str('DRIVE_NOT_REACHED'));
  56   authFailedText.querySelector('a').addEventListener('click', function(e) {
  57     chrome.fileBrowserPrivate.logoutUserForReauthentication();
  58     e.preventDefault();
  59   });
  60   this.maybeShowAuthFailBanner_();
  61 }
  62
  63 /**
  64  * FileListBannerController extends cr.EventTarget.
  65  */
  66 FileListBannerController.prototype.__proto__ = cr.EventTarget.prototype;
  67
  68 /**
  69  * Key in localStorage to keep number of times the Drive Welcome
  70  * banner has shown.
  71  */
  72 var WELCOME_HEADER_COUNTER_KEY = 'driveWelcomeHeaderCounter';
  73
  74 // If the warning was dismissed before, this key stores the quota value
  75 // (as of the moment of dismissal).
  76 // If the warning was never dismissed or was reset this key stores 0.
  77 var WARNING_DISMISSED_KEY = 'driveSpaceWarningDismissed';
  78
  79 /**
  80  * Maximum times Drive Welcome banner could have shown.
  81  */
  82 var WELCOME_HEADER_COUNTER_LIMIT = 25;
  83
  84 /**
  85  * Initializes the banner to promote DRIVE.
  86  * This method must be called before any of showing banner functions, and
  87  * also before registering them as callbacks.
  88  * @private
  89  */
  90 FileListBannerController.prototype.initializeWelcomeBanner_ = function() {
  91   this.usePromoWelcomeBanner_ = !util.boardIs('x86-mario') &&
  92                                 !util.boardIs('x86-zgb') &&
  93                                 !util.boardIs('x86-alex');
  94 };
  95
  96 /**
  97  * @param {number} value How many times the Drive Welcome header banner
  98  * has shown.
  99  * @private
 100  */
 101 FileListBannerController.prototype.setWelcomeHeaderCounter_ = function(value) {
 102   var values = {};
 103   values[WELCOME_HEADER_COUNTER_KEY] = value;
 104   chrome.storage.local.set(values);
 105 };
 106
 107 /**
 108  * @param {number} value How many times the low space warning has dismissed.
 109  * @private
 110  */
 111 FileListBannerController.prototype.setWarningDismissedCounter_ =
 112     function(value) {
 113   var values = {};
 114   values[WARNING_DISMISSED_KEY] = value;
 115   chrome.storage.local.set(values);
 116 };
 117
 118 /**
 119  * chrome.storage.onChanged event handler.
 120  * @param {Object.<string, Object>} changes Changes values.
 121  * @param {string} areaName "local" or "sync".
 122  * @private
 123  */
 124 FileListBannerController.prototype.onStorageChange_ = function(changes,
 125                                                                areaName) {
 126   if (areaName == 'local' && WELCOME_HEADER_COUNTER_KEY in changes) {
 127     this.welcomeHeaderCounter_ = changes[WELCOME_HEADER_COUNTER_KEY].newValue;
 128   }
 129   if (areaName == 'local' && WARNING_DISMISSED_KEY in changes) {
 130     this.warningDismissedCounter_ = changes[WARNING_DISMISSED_KEY].newValue;
 131   }
 132 };
 133
 134 /**
 135  * Invoked when the drive connection status is change in the volume manager.
 136  * @private
 137  */
 138 FileListBannerController.prototype.onDriveConnectionChanged_ = function() {
 139   this.maybeShowAuthFailBanner_();
 140 };
 141
 142 /**
 143  * @param {string} type 'none'|'page'|'header'.
 144  * @param {string} messageId Resource ID of the message.
 145  * @private
 146  */
 147 FileListBannerController.prototype.prepareAndShowWelcomeBanner_ =
 148     function(type, messageId) {
 149   this.showWelcomeBanner_(type);
 150
 151   var container = this.document_.querySelector('.drive-welcome.' + type);
 152   if (container.firstElementChild)
 153     return;  // Do not re-create.
 154
 155   if (!this.document_.querySelector('link[drive-welcome-style]')) {
 156     var style = this.document_.createElement('link');
 157     style.rel = 'stylesheet';
 158     style.href = 'foreground/css/drive_welcome.css';
 159     style.setAttribute('drive-welcome-style', '');
 160     this.document_.head.appendChild(style);
 161   }
 162
 163   var wrapper = util.createChild(container, 'drive-welcome-wrapper');
 164   util.createChild(wrapper, 'drive-welcome-icon');
 165
 166   var close = util.createChild(wrapper, 'cr-dialog-close');
 167   close.addEventListener('click', this.closeWelcomeBanner_.bind(this));
 168
 169   var message = util.createChild(wrapper, 'drive-welcome-message');
 170
 171   var title = util.createChild(message, 'drive-welcome-title');
 172
 173   var text = util.createChild(message, 'drive-welcome-text');
 174   text.innerHTML = str(messageId);
 175
 176   var links = util.createChild(message, 'drive-welcome-links');
 177
 178   var more;
 179   if (this.usePromoWelcomeBanner_) {
 180     var welcomeTitle = str('DRIVE_WELCOME_TITLE_ALTERNATIVE');
 181     if (util.boardIs('link'))
 182       welcomeTitle = str('DRIVE_WELCOME_TITLE_ALTERNATIVE_1TB');
 183     title.textContent = welcomeTitle;
 184     more = util.createChild(links,
 185         'drive-welcome-button drive-welcome-start', 'a');
 186     more.textContent = str('DRIVE_WELCOME_CHECK_ELIGIBILITY');
 187     more.href = str('GOOGLE_DRIVE_REDEEM_URL');
 188   } else {
 189     title.textContent = str('DRIVE_WELCOME_TITLE');
 190     more = util.createChild(links, 'plain-link', 'a');
 191     more.textContent = str('DRIVE_LEARN_MORE');
 192     more.href = str('GOOGLE_DRIVE_OVERVIEW_URL');
 193   }
 194   more.tabIndex = '13';  // See: go/filesapp-tabindex.
 195   more.target = '_blank';
 196
 197   var dismiss;
 198   if (this.usePromoWelcomeBanner_)
 199     dismiss = util.createChild(links, 'drive-welcome-button');
 200   else
 201     dismiss = util.createChild(links, 'plain-link');
 202
 203   dismiss.classList.add('drive-welcome-dismiss');
 204   dismiss.textContent = str('DRIVE_WELCOME_DISMISS');
 205   dismiss.addEventListener('click', this.closeWelcomeBanner_.bind(this));
 206
 207   this.previousDirWasOnDrive_ = false;
 208 };
 209
 210 /**
 211  * Show or hide the "Low Google Drive space" warning.
 212  * @param {boolean} show True if the box need to be shown.
 213  * @param {Object} sizeStats Size statistics. Should be defined when showing the
 214  *     warning.
 215  * @private
 216  */
 217 FileListBannerController.prototype.showLowDriveSpaceWarning_ =
 218       function(show, sizeStats) {
 219   var box = this.document_.querySelector('#volume-space-warning');
 220
 221   // Avoid showing two banners.
 222   // TODO(kaznacheev): Unify the low space warning and the promo header.
 223   if (show)
 224     this.cleanupWelcomeBanner_();
 225
 226   if (box.hidden == !show)
 227     return;
 228
 229   if (this.warningDismissedCounter_) {
 230     if (this.warningDismissedCounter_ ==
 231             sizeStats.totalSize && // Quota had not changed
 232         sizeStats.remainingSize / sizeStats.totalSize < 0.15) {
 233       // Since the last dismissal decision the quota has not changed AND
 234       // the user did not free up significant space. Obey the dismissal.
 235       show = false;
 236     } else {
 237       // Forget the dismissal. Warning will be shown again.
 238       this.setWarningDismissedCounter_(0);
 239     }
 240   }
 241
 242   box.textContent = '';
 243   if (show) {
 244     var icon = this.document_.createElement('div');
 245     icon.className = 'drive-icon';
 246     box.appendChild(icon);
 247
 248     var text = this.document_.createElement('div');
 249     text.className = 'drive-text';
 250     text.textContent = strf('DRIVE_SPACE_AVAILABLE_LONG',
 251         util.bytesToString(sizeStats.remainingSize));
 252     box.appendChild(text);
 253
 254     var link = this.document_.createElement('a');
 255     link.className = 'plain-link';
 256     link.textContent = str('DRIVE_BUY_MORE_SPACE_LINK');
 257     link.href = str('GOOGLE_DRIVE_BUY_STORAGE_URL');
 258     link.target = '_blank';
 259     box.appendChild(link);
 260
 261     var close = this.document_.createElement('div');
 262     close.className = 'cr-dialog-close';
 263     box.appendChild(close);
 264     close.addEventListener('click', function(total) {
 265       window.localStorage[WARNING_DISMISSED_KEY] = total;
 266       box.hidden = true;
 267       this.requestRelayout_(100);
 268     }.bind(this, sizeStats.totalSize));
 269   }
 270
 271   if (box.hidden != !show) {
 272     box.hidden = !show;
 273     this.requestRelayout_(100);
 274   }
 275 };
 276 /**
 277  * Closes the Drive Welcome banner.
 278  * @private
 279  */
 280 FileListBannerController.prototype.closeWelcomeBanner_ = function() {
 281   this.cleanupWelcomeBanner_();
 282   // Stop showing the welcome banner.
 283   this.setWelcomeHeaderCounter_(WELCOME_HEADER_COUNTER_LIMIT);
 284 };
 285
 286 /**
 287  * Shows or hides the welcome banner for drive.
 288  * @private
 289  */
 290 FileListBannerController.prototype.checkSpaceAndMaybeShowWelcomeBanner_ =
 291     function() {
 292   if (!this.isOnCurrentProfileDrive()) {
 293     // We are not on the drive file system. Do not show (close) the welcome
 294     // banner.
 295     this.cleanupWelcomeBanner_();
 296     this.previousDirWasOnDrive_ = false;
 297     return;
 298   }
 299
 300   var driveVolume = this.volumeManager_.getCurrentProfileVolumeInfo(
 301       util.VolumeType.DRIVE);
 302   if (this.welcomeHeaderCounter_ >= WELCOME_HEADER_COUNTER_LIMIT ||
 303       !driveVolume || driveVolume.error) {
 304     // The banner is already shown enough times or the drive FS is not mounted.
 305     // So, do nothing here.
 306     return;
 307   }
 308
 309   if (!this.showOffers_) {
 310     // Because it is not necessary to show the offer, set
 311     // |usePromoWelcomeBanner_| false here. Note that it probably should be able
 312     // to do this in the constructor, but there remains non-trivial path,
 313     // which may be causes |usePromoWelcomeBanner_| == true's behavior even
 314     // if |showOffers_| is false.
 315     // TODO(hidehiko): Make sure if it is expected or not, and simplify
 316     // |showOffers_| if possible.
 317     this.usePromoWelcomeBanner_ = false;
 318   }
 319
 320   // Perform asynchronous tasks in parallel.
 321   var group = new AsyncUtil.Group();
 322
 323   // Choose the offer basing on the board name. The default one is 100 GB.
 324   var offerSize = 100;  // In GB.
 325   var offerServiceId = 'drive.cros.echo.1';
 326
 327   if (util.boardIs('link')) {
 328     offerSize = 1024;  // 1 TB.
 329     offerServiceId = 'drive.cros.echo.2';
 330   }
 331
 332   // If the offer has been checked, then do not show the promo anymore.
 333   group.add(function(onCompleted) {
 334     chrome.echoPrivate.getOfferInfo(offerServiceId, function(offerInfo) {
 335       // If the offer has not been checked, then an error is raised.
 336       if (!chrome.runtime.lastError)
 337         this.usePromoWelcomeBanner_ = false;
 338       onCompleted();
 339     }.bind(this));
 340   }.bind(this));
 341
 342   if (this.usePromoWelcomeBanner_) {
 343     // getSizeStats for Drive file system accesses to the server, so we should
 344     // minimize the invocation.
 345     group.add(function(onCompleted) {
 346       chrome.fileBrowserPrivate.getSizeStats(
 347           util.makeFilesystemUrl(this.directoryModel_.getCurrentRootPath()),
 348           function(result) {
 349             if (result && result.totalSize >= offerSize * 1024 * 1024 * 1024)
 350               this.usePromoWelcomeBanner_ = false;
 351             onCompleted();
 352           }.bind(this));
 353     }.bind(this));
 354   }
 355
 356   group.run(this.maybeShowWelcomeBanner_.bind(this));
 357 };
 358
 359 /**
 360  * Decides which banner should be shown, and show it. This method is designed
 361  * to be called only from checkSpaceAndMaybeShowWelcomeBanner_.
 362  * @private
 363  */
 364 FileListBannerController.prototype.maybeShowWelcomeBanner_ = function() {
 365   if (this.directoryModel_.getFileList().length == 0 &&
 366       this.welcomeHeaderCounter_ == 0) {
 367     // Only show the full page banner if the header banner was never shown.
 368     // Do not increment the counter.
 369     // The timeout below is required because sometimes another
 370     // 'rescan-completed' event arrives shortly with non-empty file list.
 371     setTimeout(function() {
 372       if (this.isOnCurrentProfileDrive() && this.welcomeHeaderCounter_ == 0) {
 373         this.prepareAndShowWelcomeBanner_('page', 'DRIVE_WELCOME_TEXT_LONG');
 374       }
 375     }.bind(this), 2000);
 376   } else {
 377     // We do not want to increment the counter when the user navigates
 378     // between different directories on Drive, but we increment the counter
 379     // once anyway to prevent the full page banner from showing.
 380     if (!this.previousDirWasOnDrive_ || this.welcomeHeaderCounter_ == 0) {
 381       this.setWelcomeHeaderCounter_(this.welcomeHeaderCounter_ + 1);
 382       this.prepareAndShowWelcomeBanner_('header', 'DRIVE_WELCOME_TEXT_SHORT');
 383     }
 384   }
 385   this.previousDirWasOnDrive_ = true;
 386 };
 387
 388 /**
 389  * @return {boolean} True if current directory is on Drive root of current
 390  * profile.
 391  */
 392 FileListBannerController.prototype.isOnCurrentProfileDrive = function() {
 393   var entry = this.directoryModel_.getCurrentDirEntry();
 394   if (!entry || util.isFakeEntry(entry))
 395     return false;
 396   var locationInfo = this.volumeManager_.getLocationInfo(entry);
 397   return locationInfo &&
 398       locationInfo.rootType === RootType.DRIVE &&
 399       locationInfo.volumeInfo.profile.isCurrentProfile;
 400 };
 401
 402 /**
 403  * Shows the Drive Welcome banner.
 404  * @param {string} type 'page'|'head'|'none'.
 405  * @private
 406  */
 407 FileListBannerController.prototype.showWelcomeBanner_ = function(type) {
 408   var container = this.document_.querySelector('.dialog-container');
 409   if (container.getAttribute('drive-welcome') != type) {
 410     container.setAttribute('drive-welcome', type);
 411     this.requestRelayout_(200);  // Resize only after the animation is done.
 412   }
 413 };
 414
 415 /**
 416  * Update the UI when the current directory changes.
 417  *
 418  * @param {Event} event The directory-changed event.
 419  * @private
 420  */
 421 FileListBannerController.prototype.onDirectoryChanged_ = function(event) {
 422   var rootVolume = this.volumeManager_.getVolumeInfo(event.newDirEntry);
 423   var previousRootVolume = event.previousDirEntry ?
 424       this.volumeManager_.getVolumeInfo(event.previousDirEntry) : null;
 425
 426   // Show (or hide) the low space warning.
 427   this.maybeShowLowSpaceWarning_(rootVolume);
 428
 429   // Add or remove listener to show low space warning, if necessary.
 430   var isLowSpaceWarningTarget = this.isLowSpaceWarningTarget_(rootVolume);
 431   if (isLowSpaceWarningTarget !==
 432       this.isLowSpaceWarningTarget_(previousRootVolume)) {
 433     if (isLowSpaceWarningTarget) {
 434       chrome.fileBrowserPrivate.onDirectoryChanged.addListener(
 435           this.privateOnDirectoryChangedBound_);
 436     } else {
 437       chrome.fileBrowserPrivate.onDirectoryChanged.removeListener(
 438           this.privateOnDirectoryChangedBound_);
 439     }
 440   }
 441
 442   if (!this.isOnCurrentProfileDrive()) {
 443     this.cleanupWelcomeBanner_();
 444     this.authFailedBanner_.hidden = true;
 445   }
 446
 447   this.updateDriveUnmountedPanel_();
 448   if (this.isOnCurrentProfileDrive()) {
 449     this.unmountedPanel_.classList.remove('retry-enabled');
 450     this.maybeShowAuthFailBanner_();
 451   }
 452 };
 453
 454 /**
 455  * @param {VolumeInfo} volumeInfo Volume info to be checked.
 456  * @return {boolean} true if the file system specified by |root| is a target
 457  *     to show low space warning. Otherwise false.
 458  * @private
 459  */
 460 FileListBannerController.prototype.isLowSpaceWarningTarget_ =
 461     function(volumeInfo) {
 462   return volumeInfo &&
 463       volumeInfo.profile.isCurrentProfile &&
 464       (volumeInfo.volumeType === util.VolumeType.DOWNLOADS ||
 465        volumeInfo.volumeType === util.VolumeType.DRIVE);
 466 };
 467
 468 /**
 469  * Callback which is invoked when the file system has been changed.
 470  * @param {Object} event chrome.fileBrowserPrivate.onDirectoryChanged event.
 471  * @private
 472  */
 473 FileListBannerController.prototype.privateOnDirectoryChanged_ = function(
 474     event) {
 475   if (!this.directoryModel_.getCurrentDirEntry())
 476     return;
 477
 478   var currentDirEntry = this.directoryModel_.getCurrentDirEntry();
 479   var currentVolume = currentDirEntry &&
 480       this.volumeManager_.getVolumeInfo(currentDirEntry);
 481   var eventVolume = this.volumeManager_.getVolumeInfo(event.entry);
 482   if (currentVolume === eventVolume) {
 483     // The file system we are currently on is changed.
 484     // So, check the free space.
 485     this.maybeShowLowSpaceWarning_(currentVolume);
 486   }
 487 };
 488
 489 /**
 490  * Shows or hides the low space warning.
 491  * @param {VolumeInfo} volume Type of volume, which we are interested in.
 492  * @private
 493  */
 494 FileListBannerController.prototype.maybeShowLowSpaceWarning_ = function(
 495     volume) {
 496   // TODO(kaznacheev): Unify the two low space warning.
 497   var threshold = 0;
 498   switch (volume.volumeType) {
 499     case util.VolumeType.DOWNLOADS:
 500       this.showLowDriveSpaceWarning_(false);
 501       threshold = 0.2;
 502       break;
 503     case util.VolumeType.DRIVE:
 504       this.showLowDownloadsSpaceWarning_(false);
 505       threshold = 0.1;
 506       break;
 507     default:
 508       // If the current file system is neither the DOWNLOAD nor the DRIVE,
 509       // just hide the warning.
 510       this.showLowDownloadsSpaceWarning_(false);
 511       this.showLowDriveSpaceWarning_(false);
 512       return;
 513   }
 514
 515   chrome.fileBrowserPrivate.getSizeStats(
 516       volume.getDisplayRootDirectoryURL(),
 517       function(sizeStats) {
 518         var currentVolume = this.volumeManager_.getVolumeInfo(
 519             this.directoryModel_.getCurrentDirEntry());
 520         if (volume !== currentVolume) {
 521           // This happens when the current directory is moved during requesting
 522           // the file system size. Just ignore it.
 523           return;
 524         }
 525         // sizeStats is undefined, if some error occurs.
 526         if (!sizeStats || sizeStats.totalSize == 0)
 527           return;
 528
 529         var remainingRatio = sizeStats.remainingSize / sizeStats.totalSize;
 530         var isLowDiskSpace = remainingRatio < threshold;
 531         if (volume.volumeType === util.VolumeType.DOWNLOADS)
 532           this.showLowDownloadsSpaceWarning_(isLowDiskSpace);
 533         else
 534           this.showLowDriveSpaceWarning_(isLowDiskSpace, sizeStats);
 535       }.bind(this));
 536 };
 537
 538 /**
 539  * removes the Drive Welcome banner.
 540  * @private
 541  */
 542 FileListBannerController.prototype.cleanupWelcomeBanner_ = function() {
 543   this.showWelcomeBanner_('none');
 544 };
 545
 546 /**
 547  * Notifies the file manager what layout must be recalculated.
 548  * @param {number} delay In milliseconds.
 549  * @private
 550  */
 551 FileListBannerController.prototype.requestRelayout_ = function(delay) {
 552   var self = this;
 553   setTimeout(function() {
 554     cr.dispatchSimpleEvent(self, 'relayout');
 555   }, delay);
 556 };
 557
 558 /**
 559  * Show or hide the "Low disk space" warning.
 560  * @param {boolean} show True if the box need to be shown.
 561  * @private
 562  */
 563 FileListBannerController.prototype.showLowDownloadsSpaceWarning_ =
 564     function(show) {
 565   var box = this.document_.querySelector('.downloads-warning');
 566
 567   if (box.hidden == !show) return;
 568
 569   if (show) {
 570     var html = util.htmlUnescape(str('DOWNLOADS_DIRECTORY_WARNING'));
 571     box.innerHTML = html;
 572     var link = box.querySelector('a');
 573     link.href = str('DOWNLOADS_LOW_SPACE_WARNING_HELP_URL');
 574     link.target = '_blank';
 575   } else {
 576     box.innerHTML = '';
 577   }
 578
 579   box.hidden = !show;
 580   this.requestRelayout_(100);
 581 };
 582
 583 /**
 584  * Creates contents for the DRIVE unmounted panel.
 585  * @private
 586  */
 587 FileListBannerController.prototype.ensureDriveUnmountedPanelInitialized_ =
 588     function() {
 589   var panel = this.unmountedPanel_;
 590   if (panel.firstElementChild)
 591     return;
 592
 593   var create = function(parent, tag, className, opt_textContent) {
 594     var div = panel.ownerDocument.createElement(tag);
 595     div.className = className;
 596     div.textContent = opt_textContent || '';
 597     parent.appendChild(div);
 598     return div;
 599   };
 600
 601   var loading = create(panel, 'div', 'loading', str('DRIVE_LOADING'));
 602   var spinnerBox = create(loading, 'div', 'spinner-box');
 603   create(spinnerBox, 'div', 'spinner');
 604   create(panel, 'div', 'error', str('DRIVE_CANNOT_REACH'));
 605
 606   var learnMore = create(panel, 'a', 'learn-more plain-link',
 607                          str('DRIVE_LEARN_MORE'));
 608   learnMore.href = str('GOOGLE_DRIVE_ERROR_HELP_URL');
 609   learnMore.target = '_blank';
 610 };
 611
 612 /**
 613  * Called when volume info list is updated.
 614  * @param {Event} event Splice event data on volume info list.
 615  * @private
 616  */
 617 FileListBannerController.prototype.onVolumeInfoListSplice_ = function(event) {
 618   var isDriveVolume = function(volumeInfo) {
 619     return volumeInfo.volumeType === util.VolumeType.DRIVE;
 620   };
 621   if (event.removed.some(isDriveVolume) || event.added.some(isDriveVolume))
 622     this.updateDriveUnmountedPanel_();
 623 };
 624
 625 /**
 626  * Shows the panel when current directory is DRIVE and it's unmounted.
 627  * Hides it otherwise. The panel shows spinner if DRIVE is mounting or
 628  * an error message if it failed.
 629  * @private
 630  */
 631 FileListBannerController.prototype.updateDriveUnmountedPanel_ = function() {
 632   var node = this.document_.body;
 633   if (this.isOnCurrentProfileDrive()) {
 634     var driveVolume = this.volumeManager_.getCurrentProfileVolumeInfo(
 635         util.VolumeType.DRIVE);
 636     if (driveVolume && driveVolume.error) {
 637       this.ensureDriveUnmountedPanelInitialized_();
 638       this.unmountedPanel_.classList.add('retry-enabled');
 639     } else {
 640       this.unmountedPanel_.classList.remove('retry-enabled');
 641     }
 642     node.setAttribute('drive', status);
 643   } else {
 644     node.removeAttribute('drive');
 645   }
 646 };
 647
 648 /**
 649  * Updates the visibility of Drive Connection Warning banner, retrieving the
 650  * current connection information.
 651  * @private
 652  */
 653 FileListBannerController.prototype.maybeShowAuthFailBanner_ = function() {
 654   var connection = this.volumeManager_.getDriveConnectionState();
 655   var showDriveNotReachedMessage =
 656       this.isOnCurrentProfileDrive() &&
 657       connection.type == util.DriveConnectionType.OFFLINE &&
 658       connection.reason == util.DriveConnectionReason.NOT_READY;
 659   this.authFailedBanner_.hidden = !showDriveNotReachedMessage;
 660 };