[FileBrowser] Added DefaultAction dialog to choose default action.

chrome/browser/resources/file_manager/js/file_manager.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.
 
 /**
  * FileManager constructor.
  *
  * FileManager objects encapsulate the functionality of the file selector
  * dialogs, as well as the full screen file manager application (though the
  * latter is not yet implemented).
@@ skipping 572 matching lines @@
   /**
    * One-time initialization of dialogs.
    */
   FileManager.prototype.initDialogs_ = function() {
     var d = cr.ui.dialogs;
     d.BaseDialog.OK_LABEL = str('OK_LABEL');
     d.BaseDialog.CANCEL_LABEL = str('CANCEL_LABEL');
     this.alert = new d.AlertDialog(this.dialogDom_);
     this.confirm = new d.ConfirmDialog(this.dialogDom_);
     this.prompt = new d.PromptDialog(this.dialogDom_);
+    this.defaultTaskPicker =
+        new cr.filebrowser.DefaultActionDialog(this.dialogDom_);
   };
 
   /**
    * One-time initialization of various DOM nodes.
    */
   FileManager.prototype.initDom_ = function() {
     // Cache nodes we'll be manipulating.
     this.previewThumbnails_ =
         this.dialogDom_.querySelector('.preview-thumbnails');
     this.previewPanel_ = this.dialogDom_.querySelector('.preview-panel');
@@ skipping 1981 matching lines @@
       if (defaultTask == null) {
         defaultTask = task;
         this.taskItems_.defaultItem = this.createComboboxItem_(task);
         task.title = task.title + ' ' + str('DEFAULT_ACTION_LABEL');
         dropDownItems.push(this.createComboboxItem_(task));
       } else {
         dropDownItems.push(this.createComboboxItem_(task));
       }
     }
 
+    var defaultIdx = 0;
     this.taskItems_.hidden = dropDownItems.length == 0;
 
     if (dropDownItems.length > 1) {
       dropDownItems.sort(function(a, b) {
         return a.label.localeCompare(b.label);
       });
 
       for (var j = 0; j < dropDownItems.length; j++) {
         this.taskItems_.addDropDownItem(dropDownItems[j]);
+        if (dropDownItems[j].task.taskId == defaultTask.taskId) {
+          defaultIdx = j;
+        }
       }
+
+      this.taskItems_.addSeparator();
+      this.taskItems_.addDropDownItem({
+            label: str('CHANGE_DEFAULT_MENU_ITEM'),
+            items: dropDownItems,
+            defaultIdx: defaultIdx
+          });
     }
 
     selection.tasksList = tasksList;
     if (selection.dispatchDefault) {
       // We got a request to dispatch the default task for the selection.
       selection.dispatchDefault = false;
       this.dispatchDefaultTask_(selection);
     }
   };
 
   FileManager.prototype.getExtensionId_ = function() {
     return chrome.extension.getURL('').split('/')[2];
   };
 
   FileManager.prototype.onExternalLinkClick_ = function(url) {
     chrome.tabs.create({url: url});
     if (this.dialogType_ != FileManager.DialogType.FULL_PAGE) {
       this.onCancel_();
     }
   };
 
+  /**
+   * Task combobox handler.
+   *
+   * @param {Object} event Event containing task which was clicked.
+   */
   FileManager.prototype.onTaskItemClicked_ = function(event) {
-    this.dispatchFileTask_(event.item.task.taskId, this.selection.urls);
+    if (event.item.task) {
+      // Task field doesn't exist on change-default dropdown item.
+      this.dispatchFileTask_(event.item.task.taskId, this.selection.urls);
+    } else {
+      var extensions = [];
+
+      for (var i = 0; i < this.selection.urls.length; i++) {
+        var match = /\.(\w+)$/g.exec(this.selection.urls[i]);
+        if (match) {
+          var ext = match[1].toUpperCase();
+          if (extensions.indexOf(ext) == -1) {
+            extensions.push(ext);
+          }
+        }
+      }
+
+      var format = '';
+
+      if (extensions.length != 1) {
+        format = extensions[0];
+      }
+
+      // Change default was clicked. We should open "change default" dialog.
+      this.defaultTaskPicker.show(
+          strf('CHANGE_DEFAULT_CAPTION', format),
+          event.item.items, event.item.defaultIdx,
+          this.onDefaultTaskDone_.bind(this));
+    }
   };
 
+
+  /**
+   * Set's given task as default, when this task is applicable.
+   * @param {Object} task Task to set as default.
+   */
+  FileManager.prototype.onDefaultTaskDone_ = function(task) {
+    chrome.fileBrowserPrivate.setDefaultTask(task.taskId);
+
+    chrome.fileBrowserPrivate.getFileTasks(
+            this.selection.urls,
+            this.onTasksFound_.bind(this, this.selection));
+  }
+
   /**
    * Dispatches default task for the current selection. If tasks are not ready
    * yet, dispatches after task are available.
    * @param {Object=} opt_selection Object similar to this.selection.
    */
   FileManager.prototype.dispatchDefaultTask_ = function(opt_selection) {
     var selection = opt_selection || this.selection;
 
     if (selection.urls.length == 0)
       return;
@@ skipping 1964 matching lines @@
     function closeBanner() {
       self.cleanupGDataWelcome_();
       // Stop showing the welcome banner.
       localStorage[WELCOME_HEADER_COUNTER_KEY] = WELCOME_HEADER_COUNTER_LIMIT;
     }
 
     return maybeShowBanner;
   };
 })();