src/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       var values = {};
 266       values[WARNING_DISMISSED_KEY] = total;
 267       chrome.storage.local.set(values);
 268       box.hidden = true;
 269       this.requestRelayout_(100);
 270     }.bind(this, sizeStats.totalSize));
 271   }
 272
 273   if (box.hidden != !show) {
 274     box.hidden = !show;
 275     this.requestRelayout_(100);
 276   }
 277 };
 278 /**
 279  * Closes the Drive Welcome banner.
 280  * @private
 281  */
 282 FileListBannerController.prototype.closeWelcomeBanner_ = function() {
 283   this.cleanupWelcomeBanner_();
 284   // Stop showing the welcome banner.
 285   this.setWelcomeHeaderCounter_(WELCOME_HEADER_COUNTER_LIMIT);
 286 };
 287
 288 /**
 289  * Shows or hides the welcome banner for drive.
 290  * @private
 291  */
 292 FileListBannerController.prototype.checkSpaceAndMaybeShowWelcomeBanner_ =
 293     function() {
 294   if (!this.isOnCurrentProfileDrive()) {
 295     // We are not on the drive file system. Do not show (close) the welcome
 296     // banner.
 297     this.cleanupWelcomeBanner_();
 298     this.previousDirWasOnDrive_ = false;
 299     return;
 300   }
 301
 302   var driveVolume = this.volumeManager_.getCurrentProfileVolumeInfo(
 303       util.VolumeType.DRIVE);
 304   if (this.welcomeHeaderCounter_ >= WELCOME_HEADER_COUNTER_LIMIT ||
 305       !driveVolume || driveVolume.error) {
 306     // The banner is already shown enough times or the drive FS is not mounted.
 307     // So, do nothing here.
 308     return;
 309   }
 310
 311   if (!this.showOffers_) {
 312     // Because it is not necessary to show the offer, set
 313     // |usePromoWelcomeBanner_| false here. Note that it probably should be able
 314     // to do this in the constructor, but there remains non-trivial path,
 315     // which may be causes |usePromoWelcomeBanner_| == true's behavior even
 316     // if |showOffers_| is false.
 317     // TODO(hidehiko): Make sure if it is expected or not, and simplify
 318     // |showOffers_| if possible.
 319     this.usePromoWelcomeBanner_ = false;
 320   }
 321
 322   // Perform asynchronous tasks in parallel.
 323   var group = new AsyncUtil.Group();
 324
 325   // Choose the offer basing on the board name. The default one is 100 GB.
 326   var offerSize = 100;  // In GB.
 327   var offerServiceId = 'drive.cros.echo.1';
 328
 329   if (util.boardIs('link')) {
 330     offerSize = 1024;  // 1 TB.
 331     offerServiceId = 'drive.cros.echo.2';
 332   }
 333
 334   // If the offer has been checked, then do not show the promo anymore.
 335   group.add(function(onCompleted) {
 336     chrome.echoPrivate.getOfferInfo(offerServiceId, function(offerInfo) {
 337       // If the offer has not been checked, then an error is raised.
 338       if (!chrome.runtime.lastError)
 339         this.usePromoWelcomeBanner_ = false;
 340       onCompleted();
 341     }.bind(this));
 342   }.bind(this));
 343
 344   if (this.usePromoWelcomeBanner_) {
 345     // getSizeStats for Drive file system accesses to the server, so we should
 346     // minimize the invocation.
 347     group.add(function(onCompleted) {
 348       // Current directory must be set, since this code is called after
 349       // scaning is completed. However, the volumeInfo may be gone.
 350       chrome.fileBrowserPrivate.getSizeStats(
 351           driveVolume.volumeId,
 352           function(result) {
 353             if (result && result.totalSize >= offerSize * 1024 * 1024 * 1024)
 354               this.usePromoWelcomeBanner_ = false;
 355             onCompleted();
 356           }.bind(this));
 357     }.bind(this));
 358   }
 359
 360   group.run(this.maybeShowWelcomeBanner_.bind(this));
 361 };
 362
 363 /**
 364  * Decides which banner should be shown, and show it. This method is designed
 365  * to be called only from checkSpaceAndMaybeShowWelcomeBanner_.
 366  * @private
 367  */
 368 FileListBannerController.prototype.maybeShowWelcomeBanner_ = function() {
 369   if (this.directoryModel_.getFileList().length == 0 &&
 370       this.welcomeHeaderCounter_ == 0) {
 371     // Only show the full page banner if the header banner was never shown.
 372     // Do not increment the counter.
 373     // The timeout below is required because sometimes another
 374     // 'rescan-completed' event arrives shortly with non-empty file list.
 375     setTimeout(function() {
 376       if (this.isOnCurrentProfileDrive() && this.welcomeHeaderCounter_ == 0) {
 377         this.prepareAndShowWelcomeBanner_('page', 'DRIVE_WELCOME_TEXT_LONG');
 378       }
 379     }.bind(this), 2000);
 380   } else {
 381     // We do not want to increment the counter when the user navigates
 382     // between different directories on Drive, but we increment the counter
 383     // once anyway to prevent the full page banner from showing.
 384     if (!this.previousDirWasOnDrive_ || this.welcomeHeaderCounter_ == 0) {
 385       this.setWelcomeHeaderCounter_(this.welcomeHeaderCounter_ + 1);
 386       this.prepareAndShowWelcomeBanner_('header', 'DRIVE_WELCOME_TEXT_SHORT');
 387     }
 388   }
 389   this.previousDirWasOnDrive_ = true;
 390 };
 391
 392 /**
 393  * @return {boolean} True if current directory is on Drive root of current
 394  * profile.
 395  */
 396 FileListBannerController.prototype.isOnCurrentProfileDrive = function() {
 397   var entry = this.directoryModel_.getCurrentDirEntry();
 398   if (!entry || util.isFakeEntry(entry))
 399     return false;
 400   var locationInfo = this.volumeManager_.getLocationInfo(entry);
 401   return locationInfo &&
 402       locationInfo.rootType === RootType.DRIVE &&
 403       locationInfo.volumeInfo.profile.isCurrentProfile;
 404 };
 405
 406 /**
 407  * Shows the Drive Welcome banner.
 408  * @param {string} type 'page'|'head'|'none'.
 409  * @private
 410  */
 411 FileListBannerController.prototype.showWelcomeBanner_ = function(type) {
 412   var container = this.document_.querySelector('.dialog-container');
 413   if (container.getAttribute('drive-welcome') != type) {
 414     container.setAttribute('drive-welcome', type);
 415     this.requestRelayout_(200);  // Resize only after the animation is done.
 416   }
 417 };
 418
 419 /**
 420  * Update the UI when the current directory changes.
 421  *
 422  * @param {Event} event The directory-changed event.
 423  * @private
 424  */
 425 FileListBannerController.prototype.onDirectoryChanged_ = function(event) {
 426   var rootVolume = this.volumeManager_.getVolumeInfo(event.newDirEntry);
 427   var previousRootVolume = event.previousDirEntry ?
 428       this.volumeManager_.getVolumeInfo(event.previousDirEntry) : null;
 429
 430   // Show (or hide) the low space warning.
 431   this.maybeShowLowSpaceWarning_(rootVolume);
 432
 433   // Add or remove listener to show low space warning, if necessary.
 434   var isLowSpaceWarningTarget = this.isLowSpaceWarningTarget_(rootVolume);
 435   if (isLowSpaceWarningTarget !==
 436       this.isLowSpaceWarningTarget_(previousRootVolume)) {
 437     if (isLowSpaceWarningTarget) {
 438       chrome.fileBrowserPrivate.onDirectoryChanged.addListener(
 439           this.privateOnDirectoryChangedBound_);
 440     } else {
 441       chrome.fileBrowserPrivate.onDirectoryChanged.removeListener(
 442           this.privateOnDirectoryChangedBound_);
 443     }
 444   }
 445
 446   if (!this.isOnCurrentProfileDrive()) {
 447     this.cleanupWelcomeBanner_();
 448     this.authFailedBanner_.hidden = true;
 449   }
 450
 451   this.updateDriveUnmountedPanel_();
 452   if (this.isOnCurrentProfileDrive()) {
 453     this.unmountedPanel_.classList.remove('retry-enabled');
 454     this.maybeShowAuthFailBanner_();
 455   }
 456 };
 457
 458 /**
 459  * @param {VolumeInfo} volumeInfo Volume info to be checked.
 460  * @return {boolean} true if the file system specified by |root| is a target
 461  *     to show low space warning. Otherwise false.
 462  * @private
 463  */
 464 FileListBannerController.prototype.isLowSpaceWarningTarget_ =
 465     function(volumeInfo) {
 466   return volumeInfo &&
 467       volumeInfo.profile.isCurrentProfile &&
 468       (volumeInfo.volumeType === util.VolumeType.DOWNLOADS ||
 469        volumeInfo.volumeType === util.VolumeType.DRIVE);
 470 };
 471
 472 /**
 473  * Callback which is invoked when the file system has been changed.
 474  * @param {Object} event chrome.fileBrowserPrivate.onDirectoryChanged event.
 475  * @private
 476  */
 477 FileListBannerController.prototype.privateOnDirectoryChanged_ = function(
 478     event) {
 479   if (!this.directoryModel_.getCurrentDirEntry())
 480     return;
 481
 482   var currentDirEntry = this.directoryModel_.getCurrentDirEntry();
 483   var currentVolume = currentDirEntry &&
 484       this.volumeManager_.getVolumeInfo(currentDirEntry);
 485   var eventVolume = this.volumeManager_.getVolumeInfo(event.entry);
 486   if (currentVolume === eventVolume) {
 487     // The file system we are currently on is changed.
 488     // So, check the free space.
 489     this.maybeShowLowSpaceWarning_(currentVolume);
 490   }
 491 };
 492
 493 /**
 494  * Shows or hides the low space warning.
 495  * @param {VolumeInfo} volume Type of volume, which we are interested in.
 496  * @private
 497  */
 498 FileListBannerController.prototype.maybeShowLowSpaceWarning_ = function(
 499     volume) {
 500   // TODO(kaznacheev): Unify the two low space warning.
 501   var threshold = 0;
 502   switch (volume.volumeType) {
 503     case util.VolumeType.DOWNLOADS:
 504       this.showLowDriveSpaceWarning_(false);
 505       threshold = 0.2;
 506       break;
 507     case util.VolumeType.DRIVE:
 508       this.showLowDownloadsSpaceWarning_(false);
 509       threshold = 0.1;
 510       break;
 511     default:
 512       // If the current file system is neither the DOWNLOAD nor the DRIVE,
 513       // just hide the warning.
 514       this.showLowDownloadsSpaceWarning_(false);
 515       this.showLowDriveSpaceWarning_(false);
 516       return;
 517   }
 518
 519   // If not mounted correctly, then do not continue.
 520   if (!volume.root)
 521     return;
 522
 523   chrome.fileBrowserPrivate.getSizeStats(
 524       volume.root.toURL(),
 525       function(sizeStats) {
 526         var currentVolume = this.volumeManager_.getVolumeInfo(
 527             this.directoryModel_.getCurrentDirEntry());
 528         if (volume !== currentVolume) {
 529           // This happens when the current directory is moved during requesting
 530           // the file system size. Just ignore it.
 531           return;
 532         }
 533         // sizeStats is undefined, if some error occurs.
 534         if (!sizeStats || sizeStats.totalSize == 0)
 535           return;
 536
 537         var remainingRatio = sizeStats.remainingSize / sizeStats.totalSize;
 538         var isLowDiskSpace = remainingRatio < threshold;
 539         if (volume.volumeType === util.VolumeType.DOWNLOADS)
 540           this.showLowDownloadsSpaceWarning_(isLowDiskSpace);
 541         else
 542           this.showLowDriveSpaceWarning_(isLowDiskSpace, sizeStats);
 543       }.bind(this));
 544 };
 545
 546 /**
 547  * removes the Drive Welcome banner.
 548  * @private
 549  */
 550 FileListBannerController.prototype.cleanupWelcomeBanner_ = function() {
 551   this.showWelcomeBanner_('none');
 552 };
 553
 554 /**
 555  * Notifies the file manager what layout must be recalculated.
 556  * @param {number} delay In milliseconds.
 557  * @private
 558  */
 559 FileListBannerController.prototype.requestRelayout_ = function(delay) {
 560   var self = this;
 561   setTimeout(function() {
 562     cr.dispatchSimpleEvent(self, 'relayout');
 563   }, delay);
 564 };
 565
 566 /**
 567  * Show or hide the "Low disk space" warning.
 568  * @param {boolean} show True if the box need to be shown.
 569  * @private
 570  */
 571 FileListBannerController.prototype.showLowDownloadsSpaceWarning_ =
 572     function(show) {
 573   var box = this.document_.querySelector('.downloads-warning');
 574
 575   if (box.hidden == !show) return;
 576
 577   if (show) {
 578     var html = util.htmlUnescape(str('DOWNLOADS_DIRECTORY_WARNING'));
 579     box.innerHTML = html;
 580     box.querySelector('a').addEventListener('click', function(e) {
 581       util.visitURL(str('DOWNLOADS_LOW_SPACE_WARNING_HELP_URL'));
 582       e.preventDefault();
 583     });
 584   } else {
 585     box.innerHTML = '';
 586   }
 587
 588   box.hidden = !show;
 589   this.requestRelayout_(100);
 590 };
 591
 592 /**
 593  * Creates contents for the DRIVE unmounted panel.
 594  * @private
 595  */
 596 FileListBannerController.prototype.ensureDriveUnmountedPanelInitialized_ =
 597     function() {
 598   var panel = this.unmountedPanel_;
 599   if (panel.firstElementChild)
 600     return;
 601
 602   var create = function(parent, tag, className, opt_textContent) {
 603     var div = panel.ownerDocument.createElement(tag);
 604     div.className = className;
 605     div.textContent = opt_textContent || '';
 606     parent.appendChild(div);
 607     return div;
 608   };
 609
 610   var loading = create(panel, 'div', 'loading', str('DRIVE_LOADING'));
 611   var spinnerBox = create(loading, 'div', 'spinner-box');
 612   create(spinnerBox, 'div', 'spinner');
 613   create(panel, 'div', 'error', str('DRIVE_CANNOT_REACH'));
 614
 615   var learnMore = create(panel, 'a', 'learn-more plain-link',
 616                          str('DRIVE_LEARN_MORE'));
 617   learnMore.href = str('GOOGLE_DRIVE_ERROR_HELP_URL');
 618   learnMore.target = '_blank';
 619 };
 620
 621 /**
 622  * Called when volume info list is updated.
 623  * @param {Event} event Splice event data on volume info list.
 624  * @private
 625  */
 626 FileListBannerController.prototype.onVolumeInfoListSplice_ = function(event) {
 627   var isDriveVolume = function(volumeInfo) {
 628     return volumeInfo.volumeType === util.VolumeType.DRIVE;
 629   };
 630   if (event.removed.some(isDriveVolume) || event.added.some(isDriveVolume))
 631     this.updateDriveUnmountedPanel_();
 632 };
 633
 634 /**
 635  * Shows the panel when current directory is DRIVE and it's unmounted.
 636  * Hides it otherwise. The panel shows spinner if DRIVE is mounting or
 637  * an error message if it failed.
 638  * @private
 639  */
 640 FileListBannerController.prototype.updateDriveUnmountedPanel_ = function() {
 641   var node = this.document_.body;
 642   if (this.isOnCurrentProfileDrive()) {
 643     var driveVolume = this.volumeManager_.getCurrentProfileVolumeInfo(
 644         util.VolumeType.DRIVE);
 645     if (driveVolume && driveVolume.error) {
 646       this.ensureDriveUnmountedPanelInitialized_();
 647       this.unmountedPanel_.classList.add('retry-enabled');
 648     } else {
 649       this.unmountedPanel_.classList.remove('retry-enabled');
 650     }
 651     node.setAttribute('drive', status);
 652   } else {
 653     node.removeAttribute('drive');
 654   }
 655 };
 656
 657 /**
 658  * Updates the visibility of Drive Connection Warning banner, retrieving the
 659  * current connection information.
 660  * @private
 661  */
 662 FileListBannerController.prototype.maybeShowAuthFailBanner_ = function() {
 663   var connection = this.volumeManager_.getDriveConnectionState();
 664   var showDriveNotReachedMessage =
 665       this.isOnCurrentProfileDrive() &&
 666       connection.type == util.DriveConnectionType.OFFLINE &&
 667       connection.reason == util.DriveConnectionReason.NOT_READY;
 668   this.authFailedBanner_.hidden = !showDriveNotReachedMessage;
 669 };