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

chrome/browser/resources/file_manager/js/file_selection.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';
-
-/**
- * The current selection object.
- *
- * @param {FileManager} fileManager FileManager instance.
- * @param {Array.<number>} indexes Selected indexes.
- * @constructor
- */
-function FileSelection(fileManager, indexes) {
-  this.fileManager_ = fileManager;
-  this.computeBytesSequence_ = 0;
-  this.indexes = indexes;
-  this.entries = [];
-  this.urls = [];
-  this.totalCount = 0;
-  this.fileCount = 0;
-  this.directoryCount = 0;
-  this.bytes = 0;
-  this.showBytes = false;
-  this.allDriveFilesPresent = false,
-  this.iconType = null;
-  this.bytesKnown = false;
-  this.mustBeHidden_ = false;
-  this.mimeTypes = null;
-
-  // Synchronously compute what we can.
-  for (var i = 0; i < this.indexes.length; i++) {
-    var entry = fileManager.getFileList().item(this.indexes[i]);
-    if (!entry)
-      continue;
-
-    this.entries.push(entry);
-    this.urls.push(entry.toURL());
-
-    if (this.iconType == null) {
-      this.iconType = FileType.getIcon(entry);
-    } else if (this.iconType != 'unknown') {
-      var iconType = FileType.getIcon(entry);
-      if (this.iconType != iconType)
-        this.iconType = 'unknown';
-    }
-
-    if (entry.isFile) {
-      this.fileCount += 1;
-    } else {
-      this.directoryCount += 1;
-    }
-    this.totalCount++;
-  }
-
-  this.tasks = new FileTasks(this.fileManager_);
-
-  Object.seal(this);
-}
-
-/**
- * Computes data required to get file tasks and requests the tasks.
- *
- * @param {function} callback The callback.
- */
-FileSelection.prototype.createTasks = function(callback) {
-  if (!this.fileManager_.isOnDrive()) {
-    this.tasks.init(this.urls);
-    callback();
-    return;
-  }
-
-  this.fileManager_.metadataCache_.get(this.urls, 'drive', function(props) {
-    var present = props.filter(function(p) { return p && p.availableOffline });
-    this.allDriveFilesPresent = present.length == props.length;
-
-    // Collect all of the mime types and push that info into the selection.
-    this.mimeTypes = props.map(function(value) {
-      return (value && value.contentMimeType) || '';
-    });
-
-    this.tasks.init(this.urls, this.mimeTypes);
-    callback();
-  }.bind(this));
-};
-
-/**
- * Computes the total size of selected files.
- *
- * @param {function} callback Completion callback. Not called when cancelled,
- *     or a new call has been invoked in the meantime.
- */
-FileSelection.prototype.computeBytes = function(callback) {
-  if (this.entries.length == 0) {
-    this.bytesKnown = true;
-    this.showBytes = false;
-    this.bytes = 0;
-    return;
-  }
-
-  var computeBytesSequence = ++this.computeBytesSequence_;
-  var pendingMetadataCount = 0;
-
-  var maybeDone = function() {
-    if (pendingMetadataCount == 0) {
-      this.bytesKnown = true;
-      callback();
-    }
-  }.bind(this);
-
-  var onProps = function(properties) {
-    // Ignore if the call got cancelled, or there is another new one fired.
-    if (computeBytesSequence != this.computeBytesSequence_)
-      return;
-
-    // It may happen that the metadata is not available because a file has been
-    // deleted in the meantime.
-    if (properties)
-      this.bytes += properties.size;
-    pendingMetadataCount--;
-    maybeDone();
-  }.bind(this);
-
-  for (var index = 0; index < this.entries.length; index++) {
-    var entry = this.entries[index];
-    if (entry.isFile) {
-      this.showBytes |= !FileType.isHosted(entry);
-      pendingMetadataCount++;
-      this.fileManager_.metadataCache_.get(entry, 'filesystem', onProps);
-    } else if (entry.isDirectory) {
-      // Don't compute the directory size as it's expensive.
-      // crbug.com/179073.
-      this.showBytes = false;
-      break;
-    }
-  }
-  maybeDone();
-};
-
-/**
- * Cancels any async computation by increasing the sequence number. Results
- * of any previous call to computeBytes() will be discarded.
- *
- * @private
- */
-FileSelection.prototype.cancelComputing_ = function() {
-  this.computeBytesSequence_++;
-};
-
-/**
- * This object encapsulates everything related to current selection.
- *
- * @param {FileManager} fileManager File manager instance.
- * @extends {cr.EventTarget}
- * @constructor
- */
-function FileSelectionHandler(fileManager) {
-  this.fileManager_ = fileManager;
-  // TODO(dgozman): create a shared object with most of UI elements.
-  this.okButton_ = fileManager.okButton_;
-  this.filenameInput_ = fileManager.filenameInput_;
-  this.previewPanel_ = fileManager.previewPanel_;
-  this.taskItems_ = fileManager.taskItems_;
-}
-
-/**
- * Create the temporary disabled action menu item.
- * @return {Object} Created disabled item.
- * @private
- */
-FileSelectionHandler.createTemporaryDisabledActionMenuItem_ = function() {
-  if (!FileSelectionHandler.cachedDisabledActionMenuItem_) {
-    FileSelectionHandler.cachedDisabledActionMenuItem_ = {
-      label: str('ACTION_OPEN'),
-      disabled: true
-    };
-  }
-
-  return FileSelectionHandler.cachedDisabledActionMenuItem_;
-};
-
-/**
- * Cached the temporary disabled action menu item. Used inside
- * FileSelectionHandler.createTemporaryDisabledActionMenuItem_().
- * @private
- */
-FileSelectionHandler.cachedDisabledActionMenuItem_ = null;
-
-/**
- * FileSelectionHandler extends cr.EventTarget.
- */
-FileSelectionHandler.prototype.__proto__ = cr.EventTarget.prototype;
-
-/**
- * Maximum amount of thumbnails in the preview pane.
- *
- * @const
- * @type {number}
- */
-FileSelectionHandler.MAX_PREVIEW_THUMBNAIL_COUNT = 4;
-
-/**
- * Maximum width or height of an image what pops up when the mouse hovers
- * thumbnail in the bottom panel (in pixels).
- *
- * @const
- * @type {number}
- */
-FileSelectionHandler.IMAGE_HOVER_PREVIEW_SIZE = 200;
-
-/**
- * Update the UI when the selection model changes.
- *
- * @param {Event} event The change event.
- */
-FileSelectionHandler.prototype.onFileSelectionChanged = function(event) {
-  var indexes =
-      this.fileManager_.getCurrentList().selectionModel.selectedIndexes;
-  if (this.selection) this.selection.cancelComputing_();
-  var selection = new FileSelection(this.fileManager_, indexes);
-  this.selection = selection;
-
-  if (this.fileManager_.dialogType == DialogType.SELECT_SAVEAS_FILE) {
-    // If this is a save-as dialog, copy the selected file into the filename
-    // input text box.
-    if (this.selection.totalCount == 1 &&
-        this.selection.entries[0].isFile &&
-        this.filenameInput_.value != this.selection.entries[0].name) {
-      this.filenameInput_.value = this.selection.entries[0].name;
-    }
-  }
-
-  this.updateOkButton();
-
-  if (this.selectionUpdateTimer_) {
-    clearTimeout(this.selectionUpdateTimer_);
-    this.selectionUpdateTimer_ = null;
-  }
-
-  // The rest of the selection properties are computed via (sometimes lengthy)
-  // asynchronous calls. We initiate these calls after a timeout. If the
-  // selection is changing quickly we only do this once when it slows down.
-
-  var updateDelay = 200;
-  var now = Date.now();
-  if (now > (this.lastFileSelectionTime_ || 0) + updateDelay) {
-    // The previous selection change happened a while ago. Update the UI soon.
-    updateDelay = 0;
-  }
-  this.lastFileSelectionTime_ = now;
-
-  if (this.fileManager_.dialogType === DialogType.FULL_PAGE &&
-      selection.directoryCount === 0 && selection.fileCount > 0) {
-    // Show disabled items for position calculation of the menu. They will be
-    // overridden in this.updateFileSelectionAsync().
-    this.fileManager_.updateContextMenuActionItems(
-        FileSelectionHandler.createTemporaryDisabledActionMenuItem_(), true);
-  } else {
-    // Update context menu.
-    this.fileManager_.updateContextMenuActionItems(null, false);
-  }
-
-  this.selectionUpdateTimer_ = setTimeout(function() {
-    this.selectionUpdateTimer_ = null;
-    if (this.selection == selection)
-      this.updateFileSelectionAsync(selection);
-  }.bind(this), updateDelay);
-};
-
-/**
- * Updates the Ok button enabled state.
- *
- * @return {boolean} Whether button is enabled.
- */
-FileSelectionHandler.prototype.updateOkButton = function() {
-  var selectable;
-  var dialogType = this.fileManager_.dialogType;
-
-  if (dialogType == DialogType.SELECT_FOLDER ||
-      dialogType == DialogType.SELECT_UPLOAD_FOLDER) {
-    // In SELECT_FOLDER mode, we allow to select current directory
-    // when nothing is selected.
-    selectable = this.selection.directoryCount <= 1 &&
-        this.selection.fileCount == 0;
-  } else if (dialogType == DialogType.SELECT_OPEN_FILE) {
-    selectable = (this.isFileSelectionAvailable() &&
-                  this.selection.directoryCount == 0 &&
-                  this.selection.fileCount == 1);
-  } else if (dialogType == DialogType.SELECT_OPEN_MULTI_FILE) {
-    selectable = (this.isFileSelectionAvailable() &&
-                  this.selection.directoryCount == 0 &&
-                  this.selection.fileCount >= 1);
-  } else if (dialogType == DialogType.SELECT_SAVEAS_FILE) {
-    if (this.fileManager_.isOnReadonlyDirectory()) {
-      selectable = false;
-    } else {
-      selectable = !!this.filenameInput_.value;
-    }
-  } else if (dialogType == DialogType.FULL_PAGE) {
-    // No "select" buttons on the full page UI.
-    selectable = true;
-  } else {
-    throw new Error('Unknown dialog type');
-  }
-
-  this.okButton_.disabled = !selectable;
-  return selectable;
-};
-
-/**
-  * Check if all the files in the current selection are available. The only
-  * case when files might be not available is when the selection contains
-  * uncached Drive files and the browser is offline.
-  *
-  * @return {boolean} True if all files in the current selection are
-  *                   available.
-  */
-FileSelectionHandler.prototype.isFileSelectionAvailable = function() {
-  return !this.fileManager_.isOnDrive() ||
-      !this.fileManager_.isDriveOffline() ||
-      this.selection.allDriveFilesPresent;
-};
-
-/**
- * Calculates async selection stats and updates secondary UI elements.
- *
- * @param {FileSelection} selection The selection object.
- */
-FileSelectionHandler.prototype.updateFileSelectionAsync = function(selection) {
-  if (this.selection != selection) return;
-
-  // Update the file tasks.
-  if (this.fileManager_.dialogType === DialogType.FULL_PAGE &&
-      selection.directoryCount === 0 && selection.fileCount > 0) {
-    selection.createTasks(function() {
-      if (this.selection != selection)
-        return;
-      selection.tasks.display(this.taskItems_);
-      selection.tasks.updateMenuItem();
-    }.bind(this));
-  } else {
-    this.taskItems_.hidden = true;
-  }
-
-  // Update preview panels.
-  var wasVisible = this.previewPanel_.visible;
-  this.previewPanel_.setSelection(selection);
-  this.previewPanel_.thumbnails.selection = (selection.totalCount != 0) ?
-      selection :
-      {entries: [this.fileManager_.getCurrentDirectoryEntry()]};
-
-  // Scroll to item
-  if (!wasVisible && this.selection.totalCount == 1) {
-    var list = this.fileManager_.getCurrentList();
-    list.scrollIndexIntoView(list.selectionModel.selectedIndex);
-  }
-
-  // Sync the commands availability.
-  if (this.fileManager_.commandHandler)
-    this.fileManager_.commandHandler.updateAvailability();
-
-  // Inform tests it's OK to click buttons now.
-  if (selection.totalCount > 0) {
-    chrome.test.sendMessage('selection-change-complete');
-  }
-};