1// Copyright 2013 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 5var FocusManager = cr.ui.FocusManager; 6 7/** 8 * A history-specific FocusManager implementation, which ensures that elements 9 * "background" pages (i.e., those in a dialog that is not the topmost overlay) 10 * do not receive focus. 11 * @constructor 12 */ 13function HistoryFocusManager() { 14} 15 16cr.addSingletonGetter(HistoryFocusManager); 17 18HistoryFocusManager.prototype = { 19 __proto__: FocusManager.prototype, 20 21 /** @override */ 22 getFocusParent: function() { 23 return document.querySelector('#overlay .showing') || 24 document.querySelector('menu:not([hidden])') || 25 $('history-page'); 26 }, 27}; 28