chrome/browser/resources/pdf/ui_manager.js

   1 // Copyright 2015 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 'use strict';
   6
   7 var HIDE_TIMEOUT = 2000;
   8
   9 /**
  10  * Creates a UI Manager to handle transitioning of toolbars and panes.
  11  * @constructor
  12  * @param {Object} window The window containing the UI.
  13  * @param {Object} toolbar The toolbar element.
  14  * @param {Array} panes The panes that may be pulled in.
  15  */
  16 function UiManager(window, toolbar, panes) {
  17   this.window_ = window;
  18   this.toolbar_ = toolbar;
  19   this.panes_ = panes;
  20
  21   this.uiTimeout_ = null;
  22
  23   var userInputs = ['click', 'keydown', 'mousemove', 'scroll'];
  24   for (var i = 0; i < userInputs.length; i++)
  25     this.window_.addEventListener(userInputs[i], this.showUi_.bind(this));
  26 }
  27
  28 UiManager.prototype = {
  29   /**
  30    * @private
  31    * Display the toolbar and any pane that was previously opened.
  32    */
  33   showUi_: function() {
  34     this.toolbar_.show();
  35     for (var i = 0; i < this.panes_.length; i++)
  36       this.panes_[i].showIfOpenedByUser();
  37
  38     this.hideUiAfterTimeout();
  39   },
  40
  41   /**
  42    * @private
  43    * Hide the toolbar and any pane that was previously opened.
  44    */
  45   hideUi_: function() {
  46     this.toolbar_.hide();
  47     for (var i = 0; i < this.panes_.length; i++)
  48       this.panes_[i].hideIfOpenedByUser();
  49   },
  50
  51   /**
  52    * Hide the toolbar after the HIDE_TIMEOUT has elapsed.
  53    */
  54   hideUiAfterTimeout: function() {
  55     if (this.uiTimeout_)
  56       clearTimeout(this.uiTimeout_);
  57     this.uiTimeout_ = setTimeout(this.hideUi_.bind(this), HIDE_TIMEOUT);
  58   }
  59 };