chrome/browser/resources/print_preview/print_preview_focus_manager.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 cr.define('print_preview', function() {
   6   'use strict';
   7
   8   /**
   9    * FocusManager implementation specialized for Print Preview, which ensures
  10    * that Print Preview itself does not receive focus when an overlay is shown.
  11    * @constructor
  12    * @extends {cr.ui.FocusManager}
  13    */
  14   function PrintPreviewFocusManager() {
  15   };
  16
  17   cr.addSingletonGetter(PrintPreviewFocusManager);
  18
  19   PrintPreviewFocusManager.prototype = {
  20     __proto__: cr.ui.FocusManager.prototype,
  21
  22     /** @override */
  23     getFocusParent: function() {
  24       var el = document.body;
  25       var newEl = null;
  26       while (newEl = el.querySelector('.overlay:not([hidden])'))
  27         el = newEl;
  28       return el;
  29     }
  30   };
  31
  32   // Export
  33   return {
  34     PrintPreviewFocusManager: PrintPreviewFocusManager
  35   };
  36 });