[Files.app] Split the JavaScript files into subdirectories: common, background, and foreground

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

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-'use strict';
-
-/**
- * TODO(dzvorygin): Here we use this hack, since 'hidden' is standard
- * attribute and we can't use it's setter as usual.
- * @param {boolean} value New value of hidden property.
- */
-cr.ui.Command.prototype.setHidden = function(value) {
-  this.__lookupSetter__('hidden').call(this, value);
-};
-
-/**
- * A command.
- * @interface
- */
-var Command = function() {};
-
-/**
- * Handles the execute event.
- * @param {Event} event Command event.
- * @param {FileManager} fileManager FileManager.
- */
-Command.prototype.execute = function(event, fileManager) {};
-
-/**
- * Handles the can execute event.
- * @param {Event} event Can execute event.
- * @param {FileManager} fileManager FileManager.
- */
-Command.prototype.canExecute = function(event, fileManager) {};
-
-/**
- * Utility for commands.
- */
-var CommandUtil = {};
-
-/**
- * Extracts entry on which command event was dispatched.
- *
- * @param {DirectoryTree|DirectoryItem|NavigationList|HTMLLIElement|cr.ui.List}
- *     element Directory to extract a path from.
- * @return {Entry} Entry of the found node.
- */
-CommandUtil.getCommandEntry = function(element) {
-  if (element instanceof NavigationList) {
-    // element is a NavigationList.
-
-    /** @type {NavigationModelItem} */
-    var selectedItem = element.selectedItem;
-    return selectedItem && selectedItem.getCachedEntry();
-  } else if (element instanceof NavigationListItem) {
-    // element is a subitem of NavigationList.
-    /** @type {NavigationList} */
-    var navigationList = element.parentElement;
-    var index = navigationList.getIndexOfListItem(element);
-    /** @type {NavigationModelItem} */
-    var item = (index != -1) ? navigationList.dataModel.item(index) : null;
-    return item && item.getCachedEntry();
-  } else if (element instanceof DirectoryTree) {
-    // element is a DirectoryTree.
-    return element.selectedItem;
-  } else if (element instanceof DirectoryItem) {
-    // element is a sub item in DirectoryTree.
-
-    // DirectoryItem.fullPath is set on initialization, but entry is lazily.
-    // We may use fullPath just in case that the entry has not been set yet.
-    return element.entry;
-  } else if (element instanceof cr.ui.List) {
-    // element is a normal List (eg. the file list on the right panel).
-    var entry = element.selectedItem;
-    // Check if it is Entry or not by referring the fullPath member variable.
-    return entry && entry.fullPath ? entry : null;
-  } else {
-    console.warn('Unsupported element');
-    return null;
-  }
-};
-
-/**
- * @param {NavigationList} navigationList navigation list to extract root node.
- * @return {?RootType} Type of the found root.
- */
-CommandUtil.getCommandRootType = function(navigationList) {
-  var root = CommandUtil.getCommandEntry(navigationList);
-  return root &&
-         PathUtil.isRootPath(root.fullPath) &&
-         PathUtil.getRootType(root.fullPath);
-};
-
-/**
- * Checks if command can be executed on drive.
- * @param {Event} event Command event to mark.
- * @param {FileManager} fileManager FileManager to use.
- */
-CommandUtil.canExecuteEnabledOnDriveOnly = function(event, fileManager) {
-  event.canExecute = fileManager.isOnDrive();
-};
-
-/**
- * Checks if command should be visible on drive.
- * @param {Event} event Command event to mark.
- * @param {FileManager} fileManager FileManager to use.
- */
-CommandUtil.canExecuteVisibleOnDriveOnly = function(event, fileManager) {
-  event.canExecute = fileManager.isOnDrive();
-  event.command.setHidden(!fileManager.isOnDrive());
-};
-
-/**
- * Sets as the command as always enabled.
- * @param {Event} event Command event to mark.
- */
-CommandUtil.canExecuteAlways = function(event) {
-  event.canExecute = true;
-};
-
-/**
- * Returns a single selected/passed entry or null.
- * @param {Event} event Command event.
- * @param {FileManager} fileManager FileManager to use.
- * @return {FileEntry} The entry or null.
- */
-CommandUtil.getSingleEntry = function(event, fileManager) {
-  if (event.target.entry) {
-    return event.target.entry;
-  }
-  var selection = fileManager.getSelection();
-  if (selection.totalCount == 1) {
-    return selection.entries[0];
-  }
-  return null;
-};
-
-/**
- * Obtains target entries that can be pinned from the selection.
- * If directories are included in the selection, it just returns an empty
- * array to avoid confusing because pinning directory is not supported
- * currently.
- *
- * @return {Array.<Entry>} Target entries.
- */
-CommandUtil.getPinTargetEntries = function() {
-  var hasDirectory = false;
-  var results = fileManager.getSelection().entries.filter(function(entry) {
-    hasDirectory = hasDirectory || entry.isDirectory;
-    if (!entry || hasDirectory)
-      return false;
-    var metadata = fileManager.metadataCache_.getCached(entry, 'drive');
-    if (!metadata || metadata.hosted)
-      return false;
-    entry.pinned = metadata.pinned;
-    return true;
-  });
-  return hasDirectory ? [] : results;
-};
-
-/**
- * Sets the default handler for the commandId and prevents handling
- * the keydown events for this command. Not doing that breaks relationship
- * of original keyboard event and the command. WebKit would handle it
- * differently in some cases.
- * @param {Node} node to register command handler on.
- * @param {string} commandId Command id to respond to.
- */
-CommandUtil.forceDefaultHandler = function(node, commandId) {
-  var doc = node.ownerDocument;
-  var command = doc.querySelector('command[id="' + commandId + '"]');
-  node.addEventListener('keydown', function(e) {
-    if (command.matchesEvent(e)) {
-      // Prevent cr.ui.CommandManager of handling it and leave it
-      // for the default handler.
-      e.stopPropagation();
-    }
-  });
-  node.addEventListener('command', function(event) {
-    if (event.command.id !== commandId)
-      return;
-    document.execCommand(event.command.id);
-    event.cancelBubble = true;
-  });
-  node.addEventListener('canExecute', function(event) {
-    if (event.command.id === commandId)
-      event.canExecute = document.queryCommandEnabled(event.command.id);
-  });
-};
-
-/**
- * Default command.
- * @type {Command}
- */
-CommandUtil.defaultCommand = {
-  execute: function(event, fileManager) {
-    fileManager.document.execCommand(event.command.id);
-  },
-  canExecute: function(event, fileManager) {
-    event.canExecute = fileManager.document.queryCommandEnabled(
-        event.command.id);
-  }
-};
-
-/**
- * Creates the volume switch command with index.
- * @param {number} index Volume index from 1 to 9.
- * @return {Command} Volume switch command.
- */
-CommandUtil.createVolumeSwitchCommand = function(index) {
-  return {
-    execute: function(event, fileManager) {
-      fileManager.navigationList.selectByIndex(index - 1);
-    },
-    canExecute: function(event, fileManager) {
-      event.canExecute = index > 0 &&
-          index <= fileManager.navigationList.dataModel.length;
-    }
-  };
-};
-
-/**
- * Handle of the command events.
- * @param {FileManager} fileManager FileManager.
- * @constructor
- */
-var CommandHandler = function(fileManager) {
-  /**
-   * FileManager.
-   * @type {FileManager}
-   * @private
-   */
-  this.fileManager_ = fileManager;
-
-  /**
-   * Command elements.
-   * @type {Object.<string, cr.ui.Command>}
-   * @private
-   */
-  this.commands_ = {};
-
-  /**
-   * Whether the ctrl key is pressed or not.
-   * @type {boolean}
-   * @private
-   */
-  this.ctrlKeyPressed_ = false;
-
-  Object.seal(this);
-
-  // Decorate command tags in the document.
-  var commands = fileManager.document.querySelectorAll('command');
-  for (var i = 0; i < commands.length; i++) {
-    cr.ui.Command.decorate(commands[i]);
-    this.commands_[commands[i].id] = commands[i];
-  }
-
-  // Register events.
-  fileManager.document.addEventListener('command', this.onCommand_.bind(this));
-  fileManager.document.addEventListener('canExecute',
-                                        this.onCanExecute_.bind(this));
-  fileManager.document.addEventListener('keydown', this.onKeyDown_.bind(this));
-  fileManager.document.addEventListener('keyup', this.onKeyUp_.bind(this));
-};
-
-/**
- * Updates the availability of all commands.
- */
-CommandHandler.prototype.updateAvailability = function() {
-  for (var id in this.commands_) {
-    this.commands_[id].canExecuteChange();
-  }
-};
-
-/**
- * Handles command events.
- * @param {Event} event Command event.
- * @private
- */
-CommandHandler.prototype.onCommand_ = function(event) {
-  var handler = CommandHandler.COMMANDS_[event.command.id];
-  handler.execute.call(this, event, this.fileManager_);
-};
-
-/**
- * Handles canExecute events.
- * @param {Event} event Can execute event.
- * @private
- */
-CommandHandler.prototype.onCanExecute_ = function(event) {
-  var handler = CommandHandler.COMMANDS_[event.command.id];
-  handler.canExecute.call(this, event, this.fileManager_);
-};
-
-/**
- * Handle key down event.
- * @param {Event} event Key down event.
- * @private
- */
-CommandHandler.prototype.onKeyDown_ = function(event) {
-  // 17 is the keycode of Ctrl key and it means the event is not for other keys
-  // with Ctrl modifier but for ctrl key itself.
-  if (util.getKeyModifiers(event) + event.keyCode == 'Ctrl-17') {
-    this.ctrlKeyPressed_ = true;
-    this.updateAvailability();
-  }
-};
-
-/**
- * Handle key up event.
- * @param {Event} event Key up event.
- * @private
- */
-CommandHandler.prototype.onKeyUp_ = function(event) {
-  // 17 is the keycode of Ctrl key and it means the event is not for other keys
-  // with Ctrl modifier but for ctrl key itself.
-  if (util.getKeyModifiers(event) + event.keyCode == '17') {
-    this.ctrlKeyPressed_ = false;
-    this.updateAvailability();
-  }
-};
-
-/**
- * Commands.
- * @type {Object.<string, Command>}
- * @const
- * @private
- */
-CommandHandler.COMMANDS_ = {};
-
-/**
- * Unmounts external drive.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['unmount'] = {
-  /**
-   * @param {Event} event Command event.
-   * @param {FileManager} fileManager The file manager instance.
-   */
-  execute: function(event, fileManager) {
-    var root = CommandUtil.getCommandEntry(event.target);
-    if (root)
-      fileManager.unmountVolume(PathUtil.getRootPath(root.fullPath));
-  },
-  /**
-   * @param {Event} event Command event.
-   */
-  canExecute: function(event, fileManager) {
-    var rootType = CommandUtil.getCommandRootType(event.target);
-
-    event.canExecute = (rootType == RootType.ARCHIVE ||
-                        rootType == RootType.REMOVABLE);
-    event.command.setHidden(!event.canExecute);
-    event.command.label = rootType == RootType.ARCHIVE ?
-        str('CLOSE_ARCHIVE_BUTTON_LABEL') :
-        str('UNMOUNT_DEVICE_BUTTON_LABEL');
-  }
-};
-
-/**
- * Formats external drive.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['format'] = {
-  /**
-   * @param {Event} event Command event.
-   * @param {FileManager} fileManager The file manager instance.
-   */
-  execute: function(event, fileManager) {
-    var root = CommandUtil.getCommandEntry(event.target);
-
-    if (root) {
-      var url = util.makeFilesystemUrl(PathUtil.getRootPath(root.fullPath));
-      fileManager.confirm.show(
-          loadTimeData.getString('FORMATTING_WARNING'),
-          chrome.fileBrowserPrivate.formatDevice.bind(null, url));
-    }
-  },
-  /**
-   * @param {Event} event Command event.
-   * @param {FileManager} fileManager The file manager instance.
-   */
-  canExecute: function(event, fileManager) {
-    var directoryModel = fileManager.directoryModel;
-    var root = CommandUtil.getCommandEntry(event.target);
-    var removable = root &&
-                    PathUtil.getRootType(root.fullPath) == RootType.REMOVABLE;
-    var isReadOnly = root && directoryModel.isPathReadOnly(root.fullPath);
-    event.canExecute = removable && !isReadOnly;
-    event.command.setHidden(!removable);
-  }
-};
-
-/**
- * Imports photos from external drive.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['import-photos'] = {
-  /**
-   * @param {Event} event Command event.
-   * @param {NavigationList} navigationList Target navigation list.
-   */
-  execute: function(event, fileManager) {
-    var navigationList = fileManager.navigationList;
-    var root = CommandUtil.getCommandEntry(navigationList);
-    if (!root)
-      return;
-
-    // TODO(mtomasz): Implement launching Photo Importer.
-  },
-  /**
-   * @param {Event} event Command event.
-   * @param {NavigationList} navigationList Target navigation list.
-   */
-  canExecute: function(event, fileManager) {
-    var navigationList = fileManager.navigationList;
-    var rootType = CommandUtil.getCommandRootType(navigationList);
-    event.canExecute = (rootType != RootType.DRIVE);
-  }
-};
-
-/**
- * Initiates new folder creation.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['new-folder'] = {
-  execute: function(event, fileManager) {
-    fileManager.createNewFolder();
-  },
-  canExecute: function(event, fileManager) {
-    var directoryModel = fileManager.directoryModel;
-    event.canExecute = !fileManager.isOnReadonlyDirectory() &&
-                       !fileManager.isRenamingInProgress() &&
-                       !directoryModel.isSearching() &&
-                       !directoryModel.isScanning();
-  }
-};
-
-/**
- * Initiates new window creation.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['new-window'] = {
-  execute: function(event, fileManager) {
-    fileManager.backgroundPage.launchFileManager({
-      defaultPath: fileManager.getCurrentDirectory()
-    });
-  },
-  canExecute: function(event, fileManager) {
-    event.canExecute =
-        fileManager.getCurrentDirectoryEntry() &&
-        (fileManager.dialogType === DialogType.FULL_PAGE);
-  }
-};
-
-/**
- * Changed the default app handling inserted media.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['change-default-app'] = {
-  execute: function(event, fileManager) {
-    fileManager.showChangeDefaultAppPicker();
-  },
-  canExecute: CommandUtil.canExecuteAlways
-};
-
-/**
- * Deletes selected files.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['delete'] = {
-  execute: function(event, fileManager) {
-    fileManager.deleteSelection();
-  },
-  canExecute: function(event, fileManager) {
-    var selection = fileManager.getSelection();
-    event.canExecute = !fileManager.isOnReadonlyDirectory() &&
-                       selection &&
-                       selection.totalCount > 0;
-  }
-};
-
-/**
- * Pastes files from clipboard.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['paste'] = {
-  execute: function() {
-    document.execCommand(event.command.id);
-  },
-  canExecute: function(event, fileManager) {
-    var document = fileManager.document;
-    var fileTransferController = fileManager.fileTransferController;
-    event.canExecute = (fileTransferController &&
-        fileTransferController.queryPasteCommandEnabled());
-  }
-};
-
-CommandHandler.COMMANDS_['cut'] = CommandUtil.defaultCommand;
-CommandHandler.COMMANDS_['copy'] = CommandUtil.defaultCommand;
-
-/**
- * Initiates file renaming.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['rename'] = {
-  execute: function(event, fileManager) {
-    fileManager.initiateRename();
-  },
-  canExecute: function(event, fileManager) {
-    var selection = fileManager.getSelection();
-    event.canExecute =
-        !fileManager.isRenamingInProgress() &&
-        !fileManager.isOnReadonlyDirectory() &&
-        selection &&
-        selection.totalCount == 1;
-  }
-};
-
-/**
- * Opens drive help.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['volume-help'] = {
-  execute: function(event, fileManager) {
-    if (fileManager.isOnDrive())
-      util.visitURL(urlConstants.GOOGLE_DRIVE_HELP);
-    else
-      util.visitURL(urlConstants.FILES_APP_HELP);
-  },
-  canExecute: CommandUtil.canExecuteAlways
-};
-
-/**
- * Opens drive buy-more-space url.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['drive-buy-more-space'] = {
-  execute: function(event, fileManager) {
-    util.visitURL(urlConstants.GOOGLE_DRIVE_BUY_STORAGE);
-  },
-  canExecute: CommandUtil.canExecuteVisibleOnDriveOnly
-};
-
-/**
- * Clears drive cache.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['drive-clear-local-cache'] = {
-  execute: function(event, fileManager) {
-    chrome.fileBrowserPrivate.clearDriveCache();
-  },
-  canExecute: function(event, fileManager) {
-    event.canExecute = fileManager.isOnDrive() && this.ctrlKeyPressed_;
-    event.command.setHidden(!event.canExecute);
-  }
-};
-
-/**
- * Opens drive.google.com.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['drive-go-to-drive'] = {
-  execute: function(event, fileManager) {
-    util.visitURL(urlConstants.GOOGLE_DRIVE_ROOT);
-  },
-  canExecute: CommandUtil.canExecuteVisibleOnDriveOnly
-};
-
-/**
- * Displays open with dialog for current selection.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['open-with'] = {
-  execute: function(event, fileManager) {
-    var tasks = fileManager.getSelection().tasks;
-    if (tasks) {
-      tasks.showTaskPicker(fileManager.defaultTaskPicker,
-          str('OPEN_WITH_BUTTON_LABEL'),
-          null,
-          function(task) {
-            tasks.execute(task.taskId);
-          });
-    }
-  },
-  canExecute: function(event, fileManager) {
-    var tasks = fileManager.getSelection().tasks;
-    event.canExecute = tasks && tasks.size() > 1;
-  }
-};
-
-/**
- * Focuses search input box.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['search'] = {
-  execute: function(event, fileManager) {
-    var element = fileManager.document.querySelector('#search-box input');
-    element.focus();
-    element.select();
-  },
-  canExecute: function(event, fileManager) {
-    event.canExecute = !fileManager.isRenamingInProgress();
-  }
-};
-
-/**
- * Activates the n-th volume.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['volume-switch-1'] =
-    CommandUtil.createVolumeSwitchCommand(1);
-CommandHandler.COMMANDS_['volume-switch-2'] =
-    CommandUtil.createVolumeSwitchCommand(2);
-CommandHandler.COMMANDS_['volume-switch-3'] =
-    CommandUtil.createVolumeSwitchCommand(3);
-CommandHandler.COMMANDS_['volume-switch-4'] =
-    CommandUtil.createVolumeSwitchCommand(4);
-CommandHandler.COMMANDS_['volume-switch-5'] =
-    CommandUtil.createVolumeSwitchCommand(5);
-CommandHandler.COMMANDS_['volume-switch-6'] =
-    CommandUtil.createVolumeSwitchCommand(6);
-CommandHandler.COMMANDS_['volume-switch-7'] =
-    CommandUtil.createVolumeSwitchCommand(7);
-CommandHandler.COMMANDS_['volume-switch-8'] =
-    CommandUtil.createVolumeSwitchCommand(8);
-CommandHandler.COMMANDS_['volume-switch-9'] =
-    CommandUtil.createVolumeSwitchCommand(9);
-
-/**
- * Flips 'available offline' flag on the file.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['toggle-pinned'] = {
-  execute: function(event, fileManager) {
-    var pin = !event.command.checked;
-    event.command.checked = pin;
-    var entries = CommandUtil.getPinTargetEntries();
-    var currentEntry;
-    var error = false;
-    var steps = {
-      // Pick an entry and pin it.
-      start: function() {
-        // Check if all the entries are pinned or not.
-        if (entries.length == 0)
-          return;
-        currentEntry = entries.shift();
-        chrome.fileBrowserPrivate.pinDriveFile(
-            currentEntry.toURL(),
-            pin,
-            steps.entryPinned);
-      },
-
-      // Check the result of pinning
-      entryPinned: function() {
-        // Convert to boolean.
-        error = !!chrome.runtime.lastError;
-        if (error && pin) {
-          fileManager.metadataCache_.get(
-              currentEntry, 'filesystem', steps.showError);
-        }
-        fileManager.metadataCache_.clear(currentEntry, 'drive');
-        fileManager.metadataCache_.get(
-            currentEntry, 'drive', steps.updateUI.bind(this));
-      },
-
-      // Update the user interface accoding to the cache state.
-      updateUI: function(drive) {
-        fileManager.updateMetadataInUI_(
-            'drive', [currentEntry.toURL()], [drive]);
-        if (!error)
-          steps.start();
-      },
-
-      // Show the error
-      showError: function(filesystem) {
-        fileManager.alert.showHtml(str('DRIVE_OUT_OF_SPACE_HEADER'),
-                                   strf('DRIVE_OUT_OF_SPACE_MESSAGE',
-                                        unescape(currentEntry.name),
-                                        util.bytesToString(filesystem.size)));
-      }
-    };
-    steps.start();
-  },
-
-  canExecute: function(event, fileManager) {
-    var entries = CommandUtil.getPinTargetEntries();
-    var checked = true;
-    for (var i = 0; i < entries.length; i++) {
-      checked = checked && entries[i].pinned;
-    }
-    if (entries.length > 0) {
-      event.canExecute = true;
-      event.command.setHidden(false);
-      event.command.checked = checked;
-    } else {
-      event.canExecute = false;
-      event.command.setHidden(true);
-    }
-  }
-};
-
-/**
- * Creates zip file for current selection.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['zip-selection'] = {
-  execute: function(event, fileManager) {
-    var dirEntry = fileManager.getCurrentDirectoryEntry();
-    var selectionEntries = fileManager.getSelection().entries;
-    fileManager.fileOperationManager_.zipSelection(dirEntry, selectionEntries);
-  },
-  canExecute: function(event, fileManager) {
-    var dirEntry = fileManager.getCurrentDirectoryEntry();
-    var selection = fileManager.getSelection();
-    event.canExecute =
-        dirEntry &&
-        !fileManager.isOnReadonlyDirectory() &&
-        !fileManager.isOnDrive() &&
-        selection && selection.totalCount > 0;
-  }
-};
-
-/**
- * Shows the share dialog for the current selection (single only).
- * @type {Command}
- */
-CommandHandler.COMMANDS_['share'] = {
-  execute: function(event, fileManager) {
-    fileManager.shareSelection();
-  },
-  canExecute: function(event, fileManager) {
-    var selection = fileManager.getSelection();
-    event.canExecute = fileManager.isOnDrive() &&
-        !fileManager.isDriveOffline() &&
-        selection && selection.totalCount == 1;
-    event.command.setHidden(!fileManager.isOnDrive());
-  }
-};
-
-/**
- * Creates a shortcut of the selected folder (single only).
- * @type {Command}
- */
-CommandHandler.COMMANDS_['create-folder-shortcut'] = {
-  /**
-   * @param {Event} event Command event.
-   * @param {FileManager} fileManager The file manager instance.
-   */
-  execute: function(event, fileManager) {
-    var entry = CommandUtil.getCommandEntry(event.target);
-    if (entry)
-      fileManager.createFolderShortcut(entry.fullPath);
-  },
-
-  /**
-   * @param {Event} event Command event.
-   * @param {FileManager} fileManager The file manager instance.
-   */
-  canExecute: function(event, fileManager) {
-    var target = event.target;
-    if (!(target instanceof NavigationListItem) &&
-        !(target instanceof DirectoryItem)) {
-      event.command.setHidden(true);
-      return;
-    }
-
-    var entry = CommandUtil.getCommandEntry(event.target);
-    var folderShortcutExists = entry &&
-                               fileManager.folderShortcutExists(entry.fullPath);
-
-    var onlyOneFolderSelected = true;
-    // Only on list, user can select multiple files. The command is enabled only
-    // when a single file is selected.
-    if (event.target instanceof cr.ui.List &&
-        !(event.target instanceof NavigationList)) {
-      var items = event.target.selectedItems;
-      onlyOneFolderSelected = (items.length == 1 && items[0].isDirectory);
-    }
-
-    var eligible = entry &&
-                   PathUtil.isEligibleForFolderShortcut(entry.fullPath);
-    event.canExecute =
-        eligible && onlyOneFolderSelected && !folderShortcutExists;
-    event.command.setHidden(!eligible || !onlyOneFolderSelected);
-  }
-};
-
-/**
- * Removes the folder shortcut.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['remove-folder-shortcut'] = {
-  /**
-   * @param {Event} event Command event.
-   * @param {FileManager} fileManager The file manager instance.
-   */
-  execute: function(event, fileManager) {
-    var entry = CommandUtil.getCommandEntry(event.target);
-    if (entry && entry.fullPath)
-      fileManager.removeFolderShortcut(entry.fullPath);
-  },
-
-  /**
-   * @param {Event} event Command event.
-   * @param {FileManager} fileManager The file manager instance.
-   */
-  canExecute: function(event, fileManager) {
-    var target = event.target;
-    if (!target instanceof NavigationListItem &&
-        !target instanceof DirectoryItem) {
-      event.command.setHidden(true);
-      return;
-    }
-
-    var entry = CommandUtil.getCommandEntry(target);
-    var path = entry && entry.fullPath;
-
-    var eligible = path && PathUtil.isEligibleForFolderShortcut(path);
-    var isShortcut = path && fileManager.folderShortcutExists(path);
-    event.canExecute = isShortcut && eligible;
-    event.command.setHidden(!event.canExecute);
-  }
-};
-
-/**
- * Zoom in to the Files.app.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['zoom-in'] = {
-  execute: function(event, fileManager) {
-    chrome.fileBrowserPrivate.zoom('in');
-  },
-  canExecute: CommandUtil.canExecuteAlways
-};
-
-/**
- * Zoom out from the Files.app.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['zoom-out'] = {
-  execute: function(event, fileManager) {
-    chrome.fileBrowserPrivate.zoom('out');
-  },
-  canExecute: CommandUtil.canExecuteAlways
-};
-
-/**
- * Reset the zoom factor.
- * @type {Command}
- */
-CommandHandler.COMMANDS_['zoom-reset'] = {
-  execute: function(event, fileManager) {
-    chrome.fileBrowserPrivate.zoom('reset');
-  },
-  canExecute: CommandUtil.canExecuteAlways
-};