Move Files.app files to ui/file_manager

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

-// Copyright 2013 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.
-
-/**
- * Thin wrapper for VolumeManager. This should be an interface proxy to talk
- * to VolumeManager. This class also filters Drive related data/events if
- * driveEnabled is set to false.
- *
- * @param {VolumeManagerWrapper.DriveEnabledStatus} driveEnabled DRIVE_ENABLED
- *     if drive should be available. DRIVE_DISABLED if drive related
- *     data/events should be hidden.
- * @param {DOMWindow} opt_backgroundPage Window object of the background
- *     page. If this is specified, the class skips to get background page.
- *     TOOD(hirono): Let all clients of the class pass the background page and
- *     make the argument not optional.
- * @constructor
- * @extends {cr.EventTarget}
- */
-function VolumeManagerWrapper(driveEnabled, opt_backgroundPage) {
-  cr.EventTarget.call(this);
-
-  this.driveEnabled_ = driveEnabled;
-  this.volumeInfoList = new cr.ui.ArrayDataModel([]);
-
-  this.volumeManager_ = null;
-  this.pendingTasks_ = [];
-  this.onEventBound_ = this.onEvent_.bind(this);
-  this.onVolumeInfoListUpdatedBound_ =
-      this.onVolumeInfoListUpdated_.bind(this);
-
-  this.disposed_ = false;
-
-  // Start initialize the VolumeManager.
-  var queue = new AsyncUtil.Queue();
-
-  if (opt_backgroundPage) {
-    this.backgroundPage_ = opt_backgroundPage;
-  } else {
-    queue.run(function(callNextStep) {
-      chrome.runtime.getBackgroundPage(function(backgroundPage) {
-        this.backgroundPage_ = backgroundPage;
-        callNextStep();
-      }.bind(this));
-    }.bind(this));
-  }
-
-  queue.run(function(callNextStep) {
-    this.backgroundPage_.VolumeManager.getInstance(function(volumeManager) {
-      this.onReady_(volumeManager);
-      callNextStep();
-    }.bind(this));
-  }.bind(this));
-}
-
-/**
- * If the drive is enabled on the wrapper.
- * @enum {boolean}
- */
-VolumeManagerWrapper.DriveEnabledStatus = {
-  DRIVE_ENABLED: true,
-  DRIVE_DISABLED: false
-};
-
-/**
- * Extends cr.EventTarget.
- */
-VolumeManagerWrapper.prototype.__proto__ = cr.EventTarget.prototype;
-
-/**
- * Called when the VolumeManager gets ready for post initialization.
- * @param {VolumeManager} volumeManager The initialized VolumeManager instance.
- * @private
- */
-VolumeManagerWrapper.prototype.onReady_ = function(volumeManager) {
-  if (this.disposed_)
-    return;
-
-  this.volumeManager_ = volumeManager;
-
-  // Subscribe to VolumeManager.
-  this.volumeManager_.addEventListener(
-      'drive-connection-changed', this.onEventBound_);
-  this.volumeManager_.addEventListener(
-      'externally-unmounted', this.onEventBound_);
-
-  // Cache volumeInfoList.
-  var volumeInfoList = [];
-  for (var i = 0; i < this.volumeManager_.volumeInfoList.length; i++) {
-    var volumeInfo = this.volumeManager_.volumeInfoList.item(i);
-    // TODO(hidehiko): Filter mounted volumes located on Drive File System.
-    if (!this.driveEnabled_ && volumeInfo.volumeType === util.VolumeType.DRIVE)
-      continue;
-    volumeInfoList.push(volumeInfo);
-  }
-  this.volumeInfoList.splice.apply(
-      this.volumeInfoList,
-      [0, this.volumeInfoList.length].concat(volumeInfoList));
-
-  // Subscribe to VolumeInfoList.
-  // In VolumeInfoList, we only use 'splice' event.
-  this.volumeManager_.volumeInfoList.addEventListener(
-      'splice', this.onVolumeInfoListUpdatedBound_);
-
-  // Run pending tasks.
-  var pendingTasks = this.pendingTasks_;
-  this.pendingTasks_ = null;
-  for (var i = 0; i < pendingTasks.length; i++)
-    pendingTasks[i]();
-};
-
-/**
- * Disposes the instance. After the invocation of this method, any other
- * method should not be called.
- */
-VolumeManagerWrapper.prototype.dispose = function() {
-  this.disposed_ = true;
-
-  if (!this.volumeManager_)
-    return;
-  this.volumeManager_.removeEventListener(
-      'drive-connection-changed', this.onEventBound_);
-  this.volumeManager_.removeEventListener(
-      'externally-unmounted', this.onEventBound_);
-  this.volumeManager_.volumeInfoList.removeEventListener(
-      'splice', this.onVolumeInfoListUpdatedBound_);
-};
-
-/**
- * Called on events sent from VolumeManager. This has responsibility to
- * re-dispatch the event to the listeners.
- * @param {Event} event Event object sent from VolumeManager.
- * @private
- */
-VolumeManagerWrapper.prototype.onEvent_ = function(event) {
-  if (!this.driveEnabled_) {
-    // If the drive is disabled, ignore all drive related events.
-    if (event.type === 'drive-connection-changed' ||
-        (event.type === 'externally-unmounted' &&
-         event.volumeInfo.volumeType === util.VolumeType.DRIVE))
-      return;
-  }
-
-  this.dispatchEvent(event);
-};
-
-/**
- * Called on events of modifying VolumeInfoList.
- * @param {Event} event Event object sent from VolumeInfoList.
- * @private
- */
-VolumeManagerWrapper.prototype.onVolumeInfoListUpdated_ = function(event) {
-  if (this.driveEnabled_) {
-    // Apply the splice as is.
-    this.volumeInfoList.splice.apply(
-        this.volumeInfoList,
-        [event.index, event.removed.length].concat(event.added));
-  } else {
-    // Filters drive related volumes.
-    var index = event.index;
-    for (var i = 0; i < event.index; i++) {
-      if (this.volumeManager_.volumeInfoList.item(i).volumeType ===
-          util.VolumeType.DRIVE)
-        index--;
-    }
-
-    var numRemovedVolumes = 0;
-    for (var i = 0; i < event.removed.length; i++) {
-      if (event.removed[i].volumeType !== util.VolumeType.DRIVE)
-        numRemovedVolumes++;
-    }
-
-    var addedVolumes = [];
-    for (var i = 0; i < event.added.length; i++) {
-      var volumeInfo = event.added[i];
-      if (volumeInfo.volumeType !== util.VolumeType.DRIVE)
-        addedVolumes.push(volumeInfo);
-    }
-
-    this.volumeInfoList.splice.apply(
-        this.volumeInfoList,
-        [index, numRemovedVolumes].concat(addedVolumes));
-  }
-};
-
-/**
- * Ensures the VolumeManager is initialized, and then invokes callback.
- * If the VolumeManager is already initialized, callback will be called
- * immediately.
- * @param {function()} callback Called on initialization completion.
- */
-VolumeManagerWrapper.prototype.ensureInitialized = function(callback) {
-  if (this.pendingTasks_) {
-    this.pendingTasks_.push(this.ensureInitialized.bind(this, callback));
-    return;
-  }
-
-  callback();
-};
-
-/**
- * @return {util.DriveConnectionType} Current drive connection state.
- */
-VolumeManagerWrapper.prototype.getDriveConnectionState = function() {
-  if (!this.driveEnabled_ || !this.volumeManager_) {
-    return {
-      type: util.DriveConnectionType.OFFLINE,
-      reason: util.DriveConnectionReason.NO_SERVICE
-    };
-  }
-
-  return this.volumeManager_.getDriveConnectionState();
-};
-
-/**
- * Obtains a volume info containing the passed entry.
- * @param {Entry} entry Entry on the volume to be returned.
- * @return {VolumeInfo} The VolumeInfo instance or null if not found.
- */
-VolumeManagerWrapper.prototype.getVolumeInfo = function(entry) {
-  return this.filterDisabledDriveVolume_(
-      this.volumeManager_ && this.volumeManager_.getVolumeInfo(entry));
-};
-
-/**
- * Obtains a volume information of the current profile.
- * @param {util.VolumeType} volumeType Volume type.
- * @return {VolumeInfo} Found volume info.
- */
-VolumeManagerWrapper.prototype.getCurrentProfileVolumeInfo =
-    function(volumeType) {
-  return this.filterDisabledDriveVolume_(
-      this.volumeManager_ &&
-      this.volumeManager_.getCurrentProfileVolumeInfo(volumeType));
-};
-
-/**
- * Obtains the default display root entry.
- * @param {function(Entry)} callback Callback passed the default display root.
- */
-VolumeManagerWrapper.prototype.getDefaultDisplayRoot =
-    function(callback) {
-  this.ensureInitialized(function() {
-    var defaultVolume = this.getCurrentProfileVolumeInfo(
-        util.VolumeType.DOWNLOADS);
-    defaultVolume.resolveDisplayRoot(callback, function() {
-      // defaultVolume is DOWNLOADS and resolveDisplayRoot should succeed.
-      throw new Error(
-          'Unexpectedly failed to obtain the default display root.');
-    });
-  }.bind(this));
-};
-
-/**
- * Obtains location information from an entry.
- *
- * @param {Entry} entry File or directory entry.
- * @return {EntryLocation} Location information.
- */
-VolumeManagerWrapper.prototype.getLocationInfo = function(entry) {
-  var locationInfo =
-      this.volumeManager_ && this.volumeManager_.getLocationInfo(entry);
-  if (!locationInfo)
-    return null;
-  if (!this.filterDisabledDriveVolume_(locationInfo.volumeInfo))
-    return null;
-  return locationInfo;
-};
-
-/**
- * Requests to mount the archive file.
- * @param {string} fileUrl The path to the archive file to be mounted.
- * @param {function(VolumeInfo)} successCallback Called with the VolumeInfo
- *     instance.
- * @param {function(util.VolumeError)} errorCallback Called when an error
- *     occurs.
- */
-VolumeManagerWrapper.prototype.mountArchive = function(
-    fileUrl, successCallback, errorCallback) {
-  if (this.pendingTasks_) {
-    this.pendingTasks_.push(
-        this.mountArchive.bind(this, fileUrl, successCallback, errorCallback));
-    return;
-  }
-
-  this.volumeManager_.mountArchive(fileUrl, successCallback, errorCallback);
-};
-
-/**
- * Requests unmount the specified volume.
- * @param {!VolumeInfo} volumeInfo Volume to be unmounted.
- * @param {function()} successCallback Called on success.
- * @param {function(util.VolumeError)} errorCallback Called when an error
- *     occurs.
- */
-VolumeManagerWrapper.prototype.unmount = function(
-    volumeInfo, successCallback, errorCallback) {
-  if (this.pendingTasks_) {
-    this.pendingTasks_.push(
-        this.unmount.bind(this, volumeInfo, successCallback, errorCallback));
-    return;
-  }
-
-  this.volumeManager_.unmount(volumeInfo, successCallback, errorCallback);
-};
-
-/**
- * Filters volume info by referring driveEnabled.
- *
- * @param {VolumeInfo} volumeInfo Volume info.
- * @return {VolumeInfo} Null if the drive is disabled and the given volume is
- *     drive. Otherwise just returns the volume.
- * @private
- */
-VolumeManagerWrapper.prototype.filterDisabledDriveVolume_ =
-    function(volumeInfo) {
-  var isDrive = volumeInfo && volumeInfo.volumeType === util.VolumeType.DRIVE;
-  return this.driveEnabled_ || !isDrive ? volumeInfo : null;
-};