extensions/renderer/resources/guest_view/guest_view_iframe.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 // --site-per-process overrides for guest_view.js.
   6
   7 var GuestView = require('guestView').GuestView;
   8 var GuestViewImpl = require('guestView').GuestViewImpl;
   9 var GuestViewInternalNatives = requireNative('guest_view_internal');
  10 var ResizeEvent = require('guestView').ResizeEvent;
  11
  12 var getIframeContentWindow = function(viewInstanceId) {
  13   var view = GuestViewInternalNatives.GetViewFromID(viewInstanceId);
  14   if (!view)
  15     return null;
  16
  17   var internalIframeElement = privates(view).internalElement;
  18   if (internalIframeElement)
  19     return internalIframeElement.contentWindow;
  20
  21   return null;
  22 };
  23
  24 // Internal implementation of attach().
  25 GuestViewImpl.prototype.attachImpl$ = function(
  26     internalInstanceId, viewInstanceId, attachParams, callback) {
  27   // Check the current state.
  28   if (!this.checkState('attach')) {
  29     this.handleCallback(callback);
  30     return;
  31   }
  32
  33   // Callback wrapper function to store the contentWindow from the attachGuest()
  34   // callback, handle potential attaching failure, register an automatic detach,
  35   // and advance the queue.
  36   var callbackWrapper = function(callback, contentWindow) {
  37     // Check if attaching failed.
  38     contentWindow = getIframeContentWindow(viewInstanceId);
  39     if (!contentWindow) {
  40       this.state = GuestViewImpl.GuestState.GUEST_STATE_CREATED;
  41       this.internalInstanceId = 0;
  42     } else {
  43       // Only update the contentWindow if attaching is successful.
  44       this.contentWindow = contentWindow;
  45     }
  46
  47     this.handleCallback(callback);
  48   };
  49
  50   attachParams['instanceId'] = viewInstanceId;
  51   var contentWindow = getIframeContentWindow(viewInstanceId);
  52   // |contentWindow| is used to retrieve the RenderFrame in cpp.
  53   GuestViewInternalNatives.AttachIframeGuest(
  54       internalInstanceId, this.id, attachParams, contentWindow,
  55       callbackWrapper.bind(this, callback));
  56
  57   this.internalInstanceId = internalInstanceId;
  58   this.state = GuestViewImpl.GuestState.GUEST_STATE_ATTACHED;
  59
  60   // Detach automatically when the container is destroyed.
  61   GuestViewInternalNatives.RegisterDestructionCallback(
  62       internalInstanceId, this.weakWrapper(function() {
  63     if (this.state != GuestViewImpl.GuestState.GUEST_STATE_ATTACHED ||
  64         this.internalInstanceId != internalInstanceId) {
  65       return;
  66     }
  67
  68     this.internalInstanceId = 0;
  69     this.state = GuestViewImpl.GuestState.GUEST_STATE_CREATED;
  70   }, viewInstanceId));
  71 };
  72
  73 // Internal implementation of create().
  74 GuestViewImpl.prototype.createImpl$ = function(createParams, callback) {
  75   // Check the current state.
  76   if (!this.checkState('create')) {
  77     this.handleCallback(callback);
  78     return;
  79   }
  80
  81   // Callback wrapper function to store the guestInstanceId from the
  82   // createGuest() callback, handle potential creation failure, and advance the
  83   // queue.
  84   var callbackWrapper = function(callback, guestInfo) {
  85     this.id = guestInfo.id;
  86
  87     // Check if creation failed.
  88     if (this.id === 0) {
  89       this.state = GuestViewImpl.GuestState.GUEST_STATE_START;
  90       this.contentWindow = null;
  91     }
  92
  93     ResizeEvent.addListener(this.callOnResize, {instanceId: this.id});
  94     this.handleCallback(callback);
  95   };
  96
  97   this.sendCreateRequest(createParams, callbackWrapper.bind(this, callback));
  98
  99   this.state = GuestViewImpl.GuestState.GUEST_STATE_CREATED;
 100 };