Revert 113152 - [filebrowser] Add left panel with roots.

chrome/browser/resources/file_manager/js/file_manager.js

Index: chrome/browser/resources/file_manager/js/file_manager.js
===================================================================
--- chrome/browser/resources/file_manager/js/file_manager.js	(revision 113175)
+++ chrome/browser/resources/file_manager/js/file_manager.js	(working copy)
@@ -63,7 +63,7 @@
   // TODO(dgozman): This will be changed to LocaleInfo.
   this.locale_ = new v8Locale(navigator.language);
 
-  this.initFileSystem_();
+  this.resolveRoots_();
   this.initDom_();
   this.initDialogType_();
   this.dialogDom_.style.opacity = '1';
@@ -475,13 +475,13 @@
   // Instance methods.
 
   /**
-   * Request local file system, resolve roots and init_ after that.
-   * @private
+   * Request file system and get root entries asynchronously. Invokes init_
+   * when have finished.
    */
-  FileManager.prototype.initFileSystem_ = function() {
-    util.installFileErrorToString();
-    metrics.startInterval('Load.FileSystem');
+  FileManager.prototype.resolveRoots_ = function(callback) {
+    var rootPaths = ['Downloads', 'removable', 'archive'];
 
+    metrics.startInterval('Load.FileSystem');
     var self = this;
 
     // The list of active mount points to distinct them from other directories.
@@ -496,74 +496,41 @@
     }
 
     chrome.fileBrowserPrivate.requestLocalFileSystem(function(filesystem) {
+      self.filesystem_ = filesystem;
+      util.installFileErrorToString();
+
       metrics.recordTime('Load.FileSystem');
 
-      self.filesystem_ = filesystem;
-      self.resolveRoots_(function(rootEntries) {
+      var rootEntries = [];
+
+      function onAllRootsFound() {
+        metrics.recordTime('Load.Roots');
         self.rootEntries_ = rootEntries;
         onDone();
-      });
-    });
-  };
+      }
 
-  /**
-   * Get root entries asynchronously. Invokes callback
-   * when have finished.
-   */
-  FileManager.prototype.resolveRoots_ = function(callback) {
-    var rootPaths = [DOWNLOADS_DIRECTORY, ARCHIVE_DIRECTORY,
-        REMOVABLE_DIRECTORY].map(function(s) { return s.substring(1); });
-    var rootEntries = [];
-
-    // The number of entries left to enumerate to get all roots.
-    // When equals to zero, we are done.
-    var entriesToEnumerate = 0;
-    // Entries may be enumerated faster than next one appears, so we have this
-    // guard to not finish too early.
-    var allEntriesFound = false;
-
-    function onPathError(path, err) {
-      console.error('Error locating root path: ' + path + ': ' + err);
-    }
-
-    function onRootFound(root) {
-      if (root) {
-        rootEntries.push(root);
-      } else {
-        entriesToEnumerate--;
-        if (entriesToEnumerate == 0 && allEntriesFound) {
-          metrics.recordTime('Load.Roots');
-          callback(rootEntries);
-        }
+      function onPathError(path, err) {
+        console.error('Error locating root path: ' + path + ': ' + err);
       }
-    }
 
-    function onEntryFound(entry) {
-      if (entry) {
-        entriesToEnumerate++;
-        var path = entry.fullPath;
-        if (path == ARCHIVE_DIRECTORY || path == REMOVABLE_DIRECTORY) {
-          // All removable devices and mounted archives are considered
-          // roots, and are shown in the sidebar.
-          util.forEachDirEntry(entry, onRootFound);
+      function onEntryFound(entry) {
+        if (entry) {
+          rootEntries.push(entry);
         } else {
-          onRootFound(entry);
-          onRootFound(null);
+          onAllRootsFound();
         }
-      } else {
-        allEntriesFound = true;
       }
-    }
 
-    metrics.startInterval('Load.Roots');
-    if (this.filesystem_.name.match(/^chrome-extension_\S+:external/i)) {
-      // We've been handed the local filesystem, whose root directory
-      // cannot be enumerated.
-      util.getDirectories(this.filesystem_.root, {create: false}, rootPaths,
-                          onEntryFound, onPathError);
-    } else {
-      util.forEachDirEntry(this.filesystem_.root, onEntryFound);
-    }
+      metrics.startInterval('Load.Roots');
+      if (filesystem.name.match(/^chrome-extension_\S+:external/i)) {
+        // We've been handed the local filesystem, whose root directory
+        // cannot be enumerated.
+        util.getDirectories(filesystem.root, {create: false}, rootPaths,
+                            onEntryFound, onPathError);
+      } else {
+        util.forEachDirEntry(filesystem.root, onEntryFound);
+      }
+    });
   };
 
   /**
@@ -571,7 +538,6 @@
    */
   FileManager.prototype.init_ = function() {
     metrics.startInterval('Load.DOM');
-    this.initCommands_();
 
     // TODO(rginda): 6/22/11: Remove this test when createDateTimeFormat is
     // available in all chrome trunk builds.
@@ -629,7 +595,6 @@
     // The list of archives requested to mount. We will show contents once
     // archive is mounted, but only for mounts from within this filebrowser tab.
     this.mountRequests_ = [];
-    this.unmountRequests_ = [];
     chrome.fileBrowserPrivate.onMountCompleted.addListener(
         this.onMountCompleted_.bind(this));
 
@@ -642,6 +607,8 @@
     // all paste tasks are complete.
     this.pasteSuccessCallbacks_ = [];
 
+    this.initCommands_();
+
     this.setupCurrentDirectory_();
 
     this.summarizeSelection_();
@@ -700,6 +667,7 @@
     this.taskButtons_ = this.dialogDom_.querySelector('.task-buttons');
     this.okButton_ = this.dialogDom_.querySelector('.ok');
     this.cancelButton_ = this.dialogDom_.querySelector('.cancel');
+    this.newFolderButton_ = this.dialogDom_.querySelector('.new-folder');
     this.deleteButton_ = this.dialogDom_.querySelector('.delete-button');
 
     this.downloadsWarning_ =
@@ -730,11 +698,8 @@
     this.okButton_.addEventListener('click', this.onOk_.bind(this));
     this.cancelButton_.addEventListener('click', this.onCancel_.bind(this));
 
-    this.dialogDom_.querySelector('div.open-sidebar').addEventListener(
-        'click', this.onToggleSidebar_.bind(this));
-    this.dialogDom_.querySelector('div.close-sidebar').addEventListener(
-        'click', this.onToggleSidebar_.bind(this));
-    this.dialogContainer_ = this.dialogDom_.querySelector('.dialog-container');
+    this.dialogDom_.querySelector('button.new-folder').addEventListener(
+        'click', this.onNewFolderButtonClick_.bind(this));
 
     this.dialogDom_.querySelector('button.detail-view').addEventListener(
         'click', this.onDetailViewButtonClick_.bind(this));
@@ -790,7 +755,6 @@
 
     this.initTable_();
     this.initGrid_();
-    this.initRootsList_();
 
     this.setListType(FileManager.ListType.DETAIL);
 
@@ -799,39 +763,6 @@
     this.textSearchState_ = {text: '', date: new Date()};
   };
 
-  FileManager.prototype.initRootsList_ = function() {
-    this.rootsList_ = this.dialogDom_.querySelector('.roots-list');
-    cr.ui.List.decorate(this.rootsList_);
-
-    var self = this;
-    this.rootsList_.itemConstructor = function(entry) {
-      return self.renderRoot_(entry);
-    };
-
-    this.rootsList_.selectionModel = new cr.ui.ListSingleSelectionModel();
-    this.rootsList_.selectionModel.addEventListener(
-        'change', this.onRootsSelectionChanged_.bind(this));
-
-    // TODO(dgozman): add "Add a drive" item.
-    this.rootsList_.dataModel = new cr.ui.ArrayDataModel(this.rootEntries_);
-  };
-
-  FileManager.prototype.updateRoots_ = function(opt_changeDirectoryTo) {
-    var self = this;
-    this.resolveRoots_(function(rootEntries) {
-      self.rootEntries_ = rootEntries;
-
-      var dataModel = self.rootsList_.dataModel;
-      var args = [0, dataModel.length].concat(rootEntries);
-      dataModel.splice.apply(dataModel, args);
-
-      self.updateRootsListSelection_();
-
-      if (opt_changeDirectoryTo)
-        self.changeDirectory(opt_changeDirectoryTo);
-    });
-  };
-
   /**
    * Get the icon type for a given Entry.
    *
@@ -859,8 +790,6 @@
   }
 
   FileManager.prototype.computeIconType_ = function(entry) {
-    // TODO(dgozman): refactor this to use proper icons in left panel,
-    // and do not depend on mountPoints.
     var deviceNumber = this.getDeviceNumber(entry);
     if (deviceNumber != undefined) {
       if (this.mountPoints_[deviceNumber].mountCondition == '')
@@ -1159,11 +1088,6 @@
                 !isSystemDirEntry(this.currentDirEntry_)) &&
                 this.selection &&
                 this.selection.totalCount > 0;
-
-      case 'newfolder':
-        return this.currentDirEntry_ &&
-               (this.dialogType_ == 'saveas-file' ||
-                this.dialogType_ == 'full-page');
     }
   };
 
@@ -1369,10 +1293,6 @@
       case 'delete':
         this.deleteEntries(this.selection.entries);
         return;
-
-      case 'newfolder':
-        this.onNewFolderCommand_(event);
-        return;
     }
   };
 
@@ -1396,6 +1316,10 @@
   FileManager.prototype.onResize_ = function() {
     this.table_.style.height = this.grid_.style.height =
       this.grid_.parentNode.clientHeight + 'px';
+    this.table_.style.width = this.grid_.style.width =
+      this.grid_.parentNode.clientWidth + 'px';
+
+    this.table_.list_.style.width = this.table_.parentNode.clientWidth + 'px';
     this.table_.list_.style.height = (this.table_.clientHeight - 1 -
                                       this.table_.header_.clientHeight) + 'px';
 
@@ -1408,10 +1332,6 @@
     } else {
       this.currentList_.redraw();
     }
-
-    this.rootsList_.style.height =
-        this.rootsList_.parentNode.clientHeight + 'px';
-    this.rootsList_.redraw();
   };
 
   FileManager.prototype.resolvePath = function(
@@ -1445,11 +1365,22 @@
     // No preset given, find a good place to start.
     // Check for removable devices, if there are none, go to Downloads.
     var removableDirectoryEntry = this.rootEntries_.filter(function(rootEntry) {
-      return isParentPath(REMOVABLE_DIRECTORY, rootEntry.fullPath);
+      return rootEntry.fullPath == REMOVABLE_DIRECTORY;
     })[0];
-    var path = removableDirectoryEntry && removableDirectoryEntry.fullPath ||
-        DOWNLOADS_DIRECTORY;
-    this.changeDirectory(path, CD_NO_HISTORY);
+    if (!removableDirectoryEntry) {
+      this.changeDirectory(DOWNLOADS_DIRECTORY, CD_NO_HISTORY);
+      return;
+    }
+
+    var foundRemovable = false;
+    util.forEachDirEntry(removableDirectoryEntry, function(result) {
+      if (result) {
+        foundRemovable = true;
+      } else {  // Done enumerating, and we know the answer.
+        this.changeDirectory(foundRemovable ? '/' : DOWNLOADS_DIRECTORY,
+                             CD_NO_HISTORY);
+      }
+    }.bind(this));
   };
 
   FileManager.prototype.setupPath_ = function(path) {
@@ -1486,7 +1417,6 @@
       function onLeafError(err) {
         // Set filename first so OK button will update in changeDirectoryEntry.
         self.filenameInput_.value = leafName;
-        self.selectDefaultPathInFilenameInput_();
         if (err = FileError.NOT_FOUND_ERR) {
           // Leaf does not exist, it's just a suggested file name.
           self.changeDirectoryEntry(baseDirEntry, CD_NO_HISTORY);
@@ -1502,7 +1432,6 @@
     function onBaseError(err) {
       // Set filename first so OK button will update in changeDirectory.
       self.filenameInput_.value = leafName;
-      self.selectDefaultPathInFilenameInput_();
       console.log('Unexpected error resolving default base "' +
                   baseName + '": ' + err);
       self.changeDirectory('/', CD_NO_HISTORY);
@@ -1748,6 +1677,8 @@
     var div = this.document_.createElement('div');
     div.className = 'filename-label';
     var labelText = entry.name;
+    if (this.currentDirEntry_.name == '')
+      labelText = this.getLabelForRootPath_(labelText);
 
     div.textContent = labelText;
     div.entry = entry;
@@ -1776,80 +1707,21 @@
     return icon;
   };
 
-  /**
-   * Return the localized name for the root.
-   * @param {string} path The full path of the root (starting with slash).
-   * @return {string} The localized name.
-   */
-  FileManager.prototype.getRootLabel_ = function(path) {
-    if (path == DOWNLOADS_DIRECTORY)
-      return str('CHROMEBOOK_DIRECTORY_LABEL');
+  FileManager.prototype.getLabelForRootPath_ = function(path) {
+    // This hack lets us localize the top level directories.
+    if (path == 'Downloads')
+      return str('DOWNLOADS_DIRECTORY_LABEL');
 
-    if (path == ARCHIVE_DIRECTORY)
+    if (path == 'archive')
       return str('ARCHIVE_DIRECTORY_LABEL');
-    if (isParentPath(ARCHIVE_DIRECTORY, path))
-      return path.substring(ARCHIVE_DIRECTORY.length + 1);
 
-    if (path == REMOVABLE_DIRECTORY)
+    if (path == 'removable')
       return str('REMOVABLE_DIRECTORY_LABEL');
-    if (isParentPath(REMOVABLE_DIRECTORY, path))
-      return path.substring(REMOVABLE_DIRECTORY.length + 1);
 
-    return path;
+    return path || str('ROOT_DIRECTORY_LABEL');
   };
 
-  FileManager.prototype.getRootIconUrl_ = function(path, opt_small) {
-    var iconUrl = opt_small ? 'images/chromebook_28x28.png' :
-        'images/chromebook_24x24.png';
-    if (isParentPath(REMOVABLE_DIRECTORY, path))
-      iconUrl = 'images/filetype_device.png';
-    else if (isParentPath(ARCHIVE_DIRECTORY, path))
-      iconUrl = 'images/icon_mount_archive_16x16.png';
-    return chrome.extension.getURL(iconUrl);
-  };
-
-  FileManager.prototype.renderRoot_ = function(entry) {
-    var li = this.document_.createElement('li');
-    li.className = 'root-item';
-
-    var icon = this.document_.createElement('img');
-    icon.src = this.getRootIconUrl_(entry.fullPath, false);
-    li.appendChild(icon);
-
-    var div = this.document_.createElement('div');
-    div.className = 'text';
-    div.textContent = this.getRootLabel_(entry.fullPath);
-    li.appendChild(div);
-
-    if (isParentPath(REMOVABLE_DIRECTORY, entry.fullPath) ||
-        isParentPath(ARCHIVE_DIRECTORY, entry.fullPath)) {
-      var spacer = this.document_.createElement('div');
-      spacer.className = 'spacer';
-      li.appendChild(spacer);
-
-      var eject = this.document_.createElement('img');
-      eject.className = 'root-eject';
-      eject.setAttribute('src', chrome.extension.getURL('images/eject.png'));
-      eject.addEventListener('click', this.onEjectClick_.bind(this, entry));
-      li.appendChild(eject);
-    }
-
-    cr.defineProperty(li, 'lead', cr.PropertyKind.BOOL_ATTR);
-    cr.defineProperty(li, 'selected', cr.PropertyKind.BOOL_ATTR);
-    return li;
-  };
-
   /**
-   * Handler for eject button clicked.
-   * @param {Entry} entry Entry to eject.
-   * @param {Event} event The event.
-   */
-  FileManager.prototype.onEjectClick_ = function(entry, event) {
-    this.unmountRequests_.push(entry.toURL());
-    chrome.fileBrowserPrivate.removeMount(entry.fullPath);
-  };
-
-  /**
    * Render the Name column of the detail table.
    *
    * Invoked by cr.ui.Table when a file needs to be rendered.
@@ -1865,7 +1737,13 @@
     label.appendChild(this.renderIconType_(entry, columnId, table));
     label.entry = entry;
     label.className = 'detail-name';
-    label.appendChild(this.document_.createTextNode(entry.name));
+    if (this.currentDirEntry_.name == '') {
+      label.appendChild(this.document_.createTextNode(
+          this.getLabelForRootPath_(entry.name)));
+    } else {
+      label.appendChild(this.document_.createTextNode(entry.name));
+    }
+
     return label;
   };
 
@@ -2248,6 +2126,7 @@
 
     // These are done in separate functions, as the checks require
     // asynchronous function calls.
+    this.maybeRenderUnmountTask_(selection);
     this.maybeRenderFormattingTask_(selection);
   };
 
@@ -2269,6 +2148,38 @@
   };
 
   /**
+   * Checks whether unmount task should be displayed and if the answer is
+   * affirmative renders it.
+   * @param {Object} selection Selected files object.
+   */
+  FileManager.prototype.maybeRenderUnmountTask_ = function(selection) {
+    for (var index = 0; index < selection.urls.length; ++index) {
+      // Each url should be a mount point.
+      var path = selection.entries[index].fullPath;
+      var found = false;
+      for (var i = 0; i < this.mountPoints_.length; i++) {
+        var mountPath = this.mountPoints_[i].mountPath;
+        if (mountPath[0] != '/') {
+          mountPath = '/' + mountPath;
+        }
+        if (mountPath == path && this.mountPoints_[i].mountType == 'file') {
+          found = true;
+          break;
+        }
+      }
+      if (!found)
+        return;
+    }
+    this.renderTaskButton_({
+        taskId: this.getExtensionId_() + '|unmount-archive',
+        iconUrl:
+            chrome.extension.getURL('images/icon_unmount_archive_16x16.png'),
+        title: str('UNMOUNT_ARCHIVE'),
+        internal: true
+    });
+   };
+
+  /**
    * Checks whether formatting task should be displayed and if the answer is
    * affirmative renders it. Includes asynchronous calls, so it's splitted into
    * three parts.
@@ -2349,49 +2260,44 @@
     var self = this;
     chrome.fileBrowserPrivate.getMountPoints(function(mountPoints) {
       self.mountPoints_ = mountPoints;
-      var changeDirectoryTo = null;
-
       if (event.eventType == 'mount') {
-        // Mount request finished - remove it.
-        var index = self.mountRequests_.indexOf(event.sourceUrl);
-        if (index != -1) {
-          self.mountRequests_.splice(index, 1);
-          // Go to mounted directory, if request was initiated from this tab.
-          if (event.status == 'success')
-            changeDirectoryTo = event.mountPath;
+        for (var index = 0; index < self.mountRequests_.length; ++index) {
+          if (self.mountRequests_[index] == event.sourceUrl) {
+            self.mountRequests_.splice(index, 1);
+            if (event.status == 'success') {
+              self.changeDirectory(event.mountPath);
+            } else {
+              // Report mount error.
+              if (event.mountType == 'file') {
+                var fileName = event.sourceUrl.substr(
+                    event.sourceUrl.lastIndexOf('/') + 1);
+                self.alert.show(strf('ARCHIVE_MOUNT_FAILED', fileName,
+                                     event.status));
+              }
+            }
+            return;
+          }
         }
       }
 
-      if (event.eventType == 'unmount') {
-        // Unmount request finished - remove it.
-        var index = self.unmountRequests_.indexOf(event.sourceUrl);
-        if (index != -1)
-          self.unmountRequests_.splice(index, 1);
-      }
-
-      if (event.eventType == 'mount' && event.status != 'success' &&
-          event.mountType == 'file') {
-        // Report mount error.
-        var fileName = event.sourceUrl.substr(
-            event.sourceUrl.lastIndexOf('/') + 1);
-        self.alert.show(strf('ARCHIVE_MOUNT_FAILED', fileName,
-                             event.status));
-      }
-
-      if (event.eventType == 'unmount' && event.status != 'success') {
-        // Report unmount error.
-        // TODO(dgozman): introduce string and show alert here.
-      }
-
       if (event.eventType == 'unmount' && event.status == 'success' &&
           self.currentDirEntry_ &&
           isParentPath(event.mountPath, self.currentDirEntry_.fullPath)) {
-        changeDirectoryTo = getParentPath(event.mountPath);
+        self.changeDirectory(getParentPath(event.mountPath));
+        return;
       }
 
-      // In the case of success, roots are changed and should be rescanned.
-      if (event.status == 'success')
-        self.updateRoots_(changeDirectoryTo);
+      var rescanDirectoryNeeded = (event.status == 'success');
+      for (var i = 0; i < mountPoints.length; i++) {
+        if (event.sourceUrl == mountPoints[i].sourceUrl &&
+            mountPoints[i].mountCondition != '') {
+          rescanDirectoryNeeded = true;
+        }
+      }
+      // TODO(dgozman): rescan directory, only if it contains mounted points,
+      // when mounts location will be decided.
+      if (rescanDirectoryNeeded)
+        self.rescanDirectory_(null, 300);
     });
   };
 
@@ -2410,6 +2316,10 @@
         this.mountRequests_.push(urls[index]);
         chrome.fileBrowserPrivate.addMount(urls[index], 'file', {});
       }
+    } else if (id == 'unmount-archive') {
+      for (var index = 0; index < urls.length; ++index) {
+        chrome.fileBrowserPrivate.removeMount(urls[index]);
+      }
     } else if (id == 'format-device') {
       this.confirm.show(str('FORMATTING_WARNING'), function() {
         chrome.fileBrowserPrivate.formatDevice(urls[0]);
@@ -2486,15 +2396,6 @@
     galleryFrame.focus();
   };
 
-  FileManager.prototype.getRootForPath_ = function(path) {
-    for (var index = 0; index < this.rootEntries_.length; index++) {
-      if (isParentPath(this.rootEntries_[index].fullPath, path)) {
-        return index;
-      }
-    }
-    return -1;
-  };
-
   /**
    * Update the breadcrumb display to reflect the current directory.
    */
@@ -2502,41 +2403,23 @@
     var bc = this.dialogDom_.querySelector('.breadcrumbs');
     removeChildren(bc);
 
-    var fullPath = this.currentDirEntry_.fullPath;
-    var rootIndex = this.getRootForPath_(fullPath);
-    if (rootIndex == -1) {
-      console.error('Not root for: ' + fullPath);
-      return;
-    }
-    var root = this.rootEntries_[rootIndex];
+    var fullPath = this.currentDirEntry_.fullPath.replace(/\/$/, '');
+    var pathNames = fullPath.split('/');
+    var path = '';
 
-    var icon = this.document_.createElement('img');
-    icon.className = 'breadcrumb-icon';
-    icon.setAttribute('src', this.getRootIconUrl_(root.fullPath, true));
-    bc.appendChild(icon);
-
-    var rootPath = root.fullPath;
-    var relativePath = fullPath.substring(rootPath.length);
-    var pathNames = relativePath.replace(/\/$/, '').split('/');
-    if (pathNames[0] == '')
-      pathNames.splice(0, 1);
-
-    // We need a first breadcrumb for root, so placing last name from
-    // rootPath as first name of relativePath.
-    var rootPathNames = rootPath.replace(/\/$/, '').split('/');
-    pathNames.splice(0, 0, rootPathNames[rootPathNames.length - 1]);
-    rootPathNames.splice(rootPathNames.length - 1, 1);
-    var path = rootPathNames.join('/') + '/';
-
     for (var i = 0; i < pathNames.length; i++) {
       var pathName = pathNames[i];
-      path += pathName;
+      path += pathName + '/';
 
       var div = this.document_.createElement('div');
       div.className = 'breadcrumb-path';
-      div.textContent = i == 0 ? this.getRootLabel_(path) : pathName;
+      if (i <= 1) {
+        // i == 0: root directory itself, i == 1: the files it contains.
+        div.textContent = this.getLabelForRootPath_(pathName);
+      } else {
+        div.textContent = pathName;
+      }
 
-      path = path + '/';
       div.path = path;
       div.addEventListener('click', this.onBreadcrumbClick_.bind(this));
 
@@ -2640,17 +2523,6 @@
     }
   };
 
-  FileManager.prototype.updateRootsListSelection_ = function() {
-    if (!this.currentDirEntry_) return;
-    var index = this.getRootForPath_(this.currentDirEntry_.fullPath);
-    if (index == -1) {
-      this.rootsList_.selectionModel.selectedIndex = 0;
-    } else {
-      if (this.rootsList_.selectionModel.selectedIndex != index)
-        this.rootsList_.selectionModel.selectedIndex = index;
-    }
-  };
-
   FileManager.prototype.selectIndex = function(index) {
     this.currentList_.focus();
     if (index >= this.dataModel_.length)
@@ -2774,16 +2646,6 @@
       opt_saveHistory = !!opt_saveHistory;
     }
 
-    // Some directories are above roots, so we instead show the first root.
-    // There may be request to change directory above the roots. For example,
-    // when usb-dirve is removed, we try to change to the parent directory,
-    // which is REMOVABLE_DIRECTORY.
-    if (!dirEntry || dirEntry.fullPath == '/' ||
-        dirEntry.fullPath == REMOVABLE_DIRECTORY ||
-        dirEntry.fullPath == ARCHIVE_DIRECTORY) {
-      dirEntry = this.rootEntries_[0] || dirEntry;
-    }
-
     var location = document.location.origin + document.location.pathname + '#' +
                    encodeURI(dirEntry.fullPath);
     if (opt_saveHistory) {
@@ -3023,25 +2885,6 @@
     }
   };
 
-  FileManager.prototype.onRootsSelectionChanged_ = function(event) {
-    var root = this.rootEntries_[this.rootsList_.selectionModel.selectedIndex];
-    this.changeDirectoryEntry(root);
-  };
-
-  FileManager.prototype.selectDefaultPathInFilenameInput_ = function() {
-    var input = this.filenameInput_;
-    input.focus();
-    var selectionEnd = input.value.lastIndexOf('.');
-    if (selectionEnd == -1) {
-      input.select();
-    } else {
-      input.selectionStart = 0;
-      input.selectionEnd = selectionEnd;
-    }
-    // Clear, so we never do this again.
-    this.params_.defaultPath = '';
-  };
-
   /**
    * Update the UI when the selection model changes.
    *
@@ -3056,12 +2899,8 @@
 
       if (this.selection &&
           this.selection.totalCount == 1 &&
-          this.selection.entries[0].isFile &&
-          this.filenameInput_.value != this.selection.entries[0].name) {
+          this.selection.entries[0].isFile)
         this.filenameInput_.value = this.selection.entries[0].name;
-        if (this.params_.defaultPath == this.selection.entries[0].fullPath)
-          this.selectDefaultPathInFilenameInput_();
-      }
     }
 
     this.updateOkButton_();
@@ -3214,7 +3053,9 @@
 
     this.checkFreeSpace_(this.currentDirEntry_.fullPath);
 
-    // TODO(dgozman): title may be better than this.
+    // New folder should never be enabled in the root or media/ directories.
+    this.newFolderButton_.disabled = isSystemDirEntry(this.currentDirEntry_);
+
     this.document_.title = this.currentDirEntry_.fullPath;
 
     var self = this;
@@ -3312,101 +3153,113 @@
     this.currentList_.selectionModel.clear();
 
     this.updateBreadcrumbs_();
-    this.updateRootsListSelection_();
 
-    // Add current request to pending result list
-    this.pendingRescanQueue_.push({
-          onSuccess:opt_callback,
-          onError:opt_onError
-        });
+    if (this.currentDirEntry_.fullPath != '/') {
+      // Add current request to pending result list
+      this.pendingRescanQueue_.push({
+            onSuccess:opt_callback,
+            onError:opt_onError
+          });
 
-    if (this.rescanRunning_)
-      return;
+      if (this.rescanRunning_)
+        return;
 
-    this.rescanRunning_ = true;
+      this.rescanRunning_ = true;
 
-    // The current list of callbacks is saved and reset.  Subsequent
-    // calls to rescanDirectory_ while we're still pending will be
-    // saved and will cause an additional rescan to happen after a delay.
-    var callbacks = this.pendingRescanQueue_;
+      // The current list of callbacks is saved and reset.  Subsequent
+      // calls to rescanDirectory_ while we're still pending will be
+      // saved and will cause an additional rescan to happen after a delay.
+      var callbacks = this.pendingRescanQueue_;
 
-    this.pendingRescanQueue_ = [];
+      this.pendingRescanQueue_ = [];
 
-    var self = this;
-    var reader;
+      var self = this;
+      var reader;
 
-    function onError() {
-      if (self.pendingRescanQueue_.length > 0) {
-        setTimeout(self.rescanDirectory_.bind(self),
-            SIMULTANEOUS_RESCAN_INTERVAL);
-      }
-
-      self.rescanRunning_ = false;
-
-      for (var i= 0; i < callbacks.length; i++) {
-        if (callbacks[i].onError)
-          try {
-            callbacks[i].onError();
-          } catch (ex) {
-            console.error('Caught exception while notifying about error: ' +
-                        name, ex);
-          }
-      }
-    }
-
-    function onReadSome(entries) {
-      if (entries.length == 0) {
-        metrics.recordTime('DirectoryScan');
-        if (self.currentDirEntry_.fullPath == DOWNLOADS_DIRECTORY) {
-          metrics.reportCount("DownloadsCount", self.dataModel_.length);
-        }
-
+      function onError() {
         if (self.pendingRescanQueue_.length > 0) {
           setTimeout(self.rescanDirectory_.bind(self),
               SIMULTANEOUS_RESCAN_INTERVAL);
         }
 
         self.rescanRunning_ = false;
+
         for (var i= 0; i < callbacks.length; i++) {
-          if (callbacks[i].onSuccess)
+          if (callbacks[i].onError)
             try {
-              callbacks[i].onSuccess();
+              callbacks[i].onError();
             } catch (ex) {
               console.error('Caught exception while notifying about error: ' +
                           name, ex);
             }
         }
-
-        return;
       }
 
-      // Splice takes the to-be-spliced-in array as individual parameters,
-      // rather than as an array, so we need to perform some acrobatics...
-      var spliceArgs = [].slice.call(entries);
+      function onReadSome(entries) {
+        if (entries.length == 0) {
+          metrics.recordTime('DirectoryScan');
+          if (self.currentDirEntry_.fullPath == DOWNLOADS_DIRECTORY) {
+            metrics.reportCount("DownloadsCount", self.dataModel_.length);
+          }
 
-      // Hide files that start with a dot ('.').
-      // TODO(rginda): User should be able to override this. Support for other
-      // commonly hidden patterns might be nice too.
-      if (self.filterFiles_) {
-        spliceArgs = spliceArgs.filter(function(e) {
-            return e.name.substr(0, 1) != '.';
-          });
-      }
+          if (self.pendingRescanQueue_.length > 0) {
+            setTimeout(self.rescanDirectory_.bind(self),
+                SIMULTANEOUS_RESCAN_INTERVAL);
+          }
 
-      self.prefetchCacheForSorting_(spliceArgs, function() {
-        spliceArgs.unshift(0, 0);  // index, deleteCount
-        self.dataModel_.splice.apply(self.dataModel_, spliceArgs);
+          self.rescanRunning_ = false;
+          for (var i= 0; i < callbacks.length; i++) {
+            if (callbacks[i].onSuccess)
+              try {
+                callbacks[i].onSuccess();
+              } catch (ex) {
+                console.error('Caught exception while notifying about error: ' +
+                            name, ex);
+              }
+          }
 
-        // Keep reading until entries.length is 0.
-        reader.readEntries(onReadSome, onError);
-      });
-    };
+          return;
+        }
 
-    metrics.startInterval('DirectoryScan');
+        // Splice takes the to-be-spliced-in array as individual parameters,
+        // rather than as an array, so we need to perform some acrobatics...
+        var spliceArgs = [].slice.call(entries);
 
-    // If not the root directory, just read the contents.
-    reader = this.currentDirEntry_.createReader();
-    reader.readEntries(onReadSome, onError);
+        // Hide files that start with a dot ('.').
+        // TODO(rginda): User should be able to override this. Support for other
+        // commonly hidden patterns might be nice too.
+        if (self.filterFiles_) {
+          spliceArgs = spliceArgs.filter(function(e) {
+              return e.name.substr(0, 1) != '.';
+            });
+        }
+
+        self.prefetchCacheForSorting_(spliceArgs, function() {
+          spliceArgs.unshift(0, 0);  // index, deleteCount
+          self.dataModel_.splice.apply(self.dataModel_, spliceArgs);
+
+          // Keep reading until entries.length is 0.
+          reader.readEntries(onReadSome, onError);
+        });
+      };
+
+      metrics.startInterval('DirectoryScan');
+
+      // If not the root directory, just read the contents.
+      reader = this.currentDirEntry_.createReader();
+      reader.readEntries(onReadSome, onError);
+      return;
+    }
+
+    // Otherwise, use the provided list of root subdirectories, since the
+    // real local filesystem root directory (the one we use outside the
+    // harness) can't be enumerated yet.
+    var spliceArgs = [].slice.call(this.rootEntries_);
+    spliceArgs.unshift(0, 0);  // index, deleteCount
+    this.dataModel_.splice.apply(this.dataModel_, spliceArgs);
+
+    if (opt_callback)
+      opt_callback();
   };
 
   FileManager.prototype.prefetchCacheForSorting_ = function(entries, callback) {
@@ -3660,17 +3513,7 @@
     }, 0);
   };
 
-  FileManager.prototype.onToggleSidebar_ = function(event) {
-    if (this.dialogContainer_.hasAttribute('sidebar')) {
-      this.dialogContainer_.removeAttribute('sidebar');
-    } else {
-      this.dialogContainer_.setAttribute('sidebar', 'sidebar');
-    }
-    // TODO(dgozman): make table header css-resizable.
-    setTimeout(this.onResize_.bind(this), 300);
-  };
-
-  FileManager.prototype.onNewFolderCommand_ = function(event) {
+  FileManager.prototype.onNewFolderButtonClick_ = function(event) {
     var self = this;
 
     function onNameSelected(name) {
@@ -3799,10 +3642,9 @@
         break;
 
       case 32:  // Ctrl-Space => New Folder.
-        if ((this.dialogType_ == 'saveas-file' ||
-             this.dialogType_ == 'full-page') && event.ctrlKey) {
+        if (this.newFolderButton_.style.display != 'none' && event.ctrlKey) {
           event.preventDefault();
-          this.onNewFolderCommand_();
+          this.onNewFolderButtonClick_();
         }
         break;