extensions/renderer/resources/guest_view/extension_options/extension_options_attributes.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 // This module implements the attributes of the <extensionoptions> tag.
   6
   7 var GuestViewAttributes = require('guestViewAttributes').GuestViewAttributes;
   8 var ExtensionOptionsConstants =
   9     require('extensionOptionsConstants').ExtensionOptionsConstants;
  10 var ExtensionOptionsImpl = require('extensionOptions').ExtensionOptionsImpl;
  11
  12 // -----------------------------------------------------------------------------
  13 // ExtensionAttribute object.
  14
  15 // Attribute that handles extension binded to the extensionoptions.
  16 function ExtensionAttribute(view) {
  17   GuestViewAttributes.Attribute.call(
  18       this, ExtensionOptionsConstants.ATTRIBUTE_EXTENSION, view);
  19 }
  20
  21 ExtensionAttribute.prototype.__proto__ =
  22     GuestViewAttributes.Attribute.prototype;
  23
  24 ExtensionAttribute.prototype.handleMutation = function(oldValue, newValue) {
  25   // Once this attribute has been set, it cannot be unset.
  26   if (!newValue && oldValue) {
  27     this.setValueIgnoreMutation(oldValue);
  28     return;
  29   }
  30
  31   if (!newValue || !this.elementAttached)
  32     return;
  33
  34   this.view.createGuest();
  35 };
  36
  37 // -----------------------------------------------------------------------------
  38
  39 // Sets up all of the extensionoptions attributes.
  40 ExtensionOptionsImpl.prototype.setupAttributes = function() {
  41   this.attributes[ExtensionOptionsConstants.ATTRIBUTE_EXTENSION] =
  42       new ExtensionAttribute(this);
  43 };