chrome/browser/resources/options/alert_overlay.js

   1 // Copyright (c) 2012 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('options', function() {
   6   var Page = cr.ui.pageManager.Page;
   7   var PageManager = cr.ui.pageManager.PageManager;
   8
   9   /**
  10    * AlertOverlay class
  11    * Encapsulated handling of a generic alert.
  12    * @constructor
  13    * @extends {cr.ui.pageManager.Page}
  14    */
  15   function AlertOverlay() {
  16     Page.call(this, 'alertOverlay', '', 'alertOverlay');
  17   }
  18
  19   cr.addSingletonGetter(AlertOverlay);
  20
  21   AlertOverlay.prototype = {
  22     // Inherit AlertOverlay from Page.
  23     __proto__: Page.prototype,
  24
  25     /**
  26      * Whether the page can be shown. Used to make sure the page is only
  27      * shown via AlertOverlay.Show(), and not via the address bar.
  28      * @private
  29      */
  30     canShow_: false,
  31
  32     /** @override */
  33     initializePage: function() {
  34       Page.prototype.initializePage.call(this);
  35
  36       // AlertOverlay is special in that it is not tied to one page or overlay.
  37       this.alwaysOnTop = true;
  38
  39       var self = this;
  40       $('alertOverlayOk').onclick = function(event) {
  41         self.handleOK_();
  42       };
  43
  44       $('alertOverlayCancel').onclick = function(event) {
  45         self.handleCancel_();
  46       };
  47     },
  48
  49     /**
  50      * Handle the 'ok' button.  Clear the overlay and call the ok callback if
  51      * available.
  52      * @private
  53      */
  54     handleOK_: function() {
  55       PageManager.closeOverlay();
  56       if (this.okCallback != undefined) {
  57         this.okCallback.call();
  58       }
  59     },
  60
  61     /**
  62      * Handle the 'cancel' button.  Clear the overlay and call the cancel
  63      * callback if available.
  64      * @private
  65      */
  66     handleCancel_: function() {
  67       PageManager.closeOverlay();
  68       if (this.cancelCallback != undefined) {
  69         this.cancelCallback.call();
  70       }
  71     },
  72
  73     /**
  74      * The page is getting hidden. Don't let it be shown again.
  75      * @override
  76      */
  77     willHidePage: function() {
  78       this.canShow_ = false;
  79     },
  80
  81     /** @override */
  82     canShowPage: function() {
  83       return this.canShow_;
  84     },
  85   };
  86
  87   /**
  88    * Show an alert overlay with the given message, button titles, and
  89    * callbacks.
  90    * @param {string} title The alert title to display to the user.
  91    * @param {string} message The alert message to display to the user.
  92    * @param {string} okTitle The title of the OK button. If undefined or empty,
  93    *     no button is shown.
  94    * @param {string} cancelTitle The title of the cancel button. If undefined or
  95    *     empty, no button is shown.
  96    * @param {function()} okCallback A function to be called when the user
  97    *     presses the ok button.  The alert window will be closed automatically.
  98    *     Can be undefined.
  99    * @param {function()} cancelCallback A function to be called when the user
 100    *     presses the cancel button.  The alert window will be closed
 101    *     automatically.  Can be undefined.
 102    */
 103   AlertOverlay.show = function(
 104       title, message, okTitle, cancelTitle, okCallback, cancelCallback) {
 105     if (title != undefined) {
 106       $('alertOverlayTitle').textContent = title;
 107       $('alertOverlayTitle').style.display = 'block';
 108     } else {
 109       $('alertOverlayTitle').style.display = 'none';
 110     }
 111
 112     if (message != undefined) {
 113       $('alertOverlayMessage').textContent = message;
 114       $('alertOverlayMessage').style.display = 'block';
 115     } else {
 116       $('alertOverlayMessage').style.display = 'none';
 117     }
 118
 119     if (okTitle != undefined && okTitle != '') {
 120       $('alertOverlayOk').textContent = okTitle;
 121       $('alertOverlayOk').style.display = 'block';
 122     } else {
 123       $('alertOverlayOk').style.display = 'none';
 124     }
 125
 126     if (cancelTitle != undefined && cancelTitle != '') {
 127       $('alertOverlayCancel').textContent = cancelTitle;
 128       $('alertOverlayCancel').style.display = 'inline';
 129     } else {
 130       $('alertOverlayCancel').style.display = 'none';
 131     }
 132
 133     var alertOverlay = AlertOverlay.getInstance();
 134     alertOverlay.okCallback = okCallback;
 135     alertOverlay.cancelCallback = cancelCallback;
 136     alertOverlay.canShow_ = true;
 137
 138     // Intentionally don't show the URL in the location bar as we don't want
 139     // people trying to navigate here by hand.
 140     PageManager.showPageByName('alertOverlay', false);
 141   };
 142
 143   // Export
 144   return {
 145     AlertOverlay: AlertOverlay
 146   };
 147 });