components/guest_view/renderer/guest_view_request.cc

   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 #include "components/guest_view/renderer/guest_view_request.h"
   6
   7 #include "components/guest_view/common/guest_view_messages.h"
   8 #include "components/guest_view/renderer/guest_view_container.h"
   9 #include "content/public/renderer/render_frame.h"
  10 #include "content/public/renderer/render_view.h"
  11 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  12 #include "third_party/WebKit/public/web/WebRemoteFrame.h"
  13 #include "third_party/WebKit/public/web/WebScopedMicrotaskSuppression.h"
  14 #include "third_party/WebKit/public/web/WebView.h"
  15
  16 namespace guest_view {
  17
  18 GuestViewRequest::GuestViewRequest(GuestViewContainer* container,
  19                                    v8::Local<v8::Function> callback,
  20                                    v8::Isolate* isolate)
  21     : container_(container),
  22       callback_(isolate, callback),
  23       isolate_(isolate) {
  24 }
  25
  26 GuestViewRequest::~GuestViewRequest() {
  27 }
  28
  29 void GuestViewRequest::ExecuteCallbackIfAvailable(
  30     int argc,
  31     scoped_ptr<v8::Local<v8::Value>[]> argv) {
  32   if (callback_.IsEmpty())
  33     return;
  34
  35   v8::HandleScope handle_scope(isolate());
  36   v8::Local<v8::Function> callback =
  37       v8::Local<v8::Function>::New(isolate_, callback_);
  38   v8::Local<v8::Context> context = callback->CreationContext();
  39   if (context.IsEmpty())
  40     return;
  41
  42   v8::Context::Scope context_scope(context);
  43   blink::WebScopedMicrotaskSuppression suppression;
  44
  45   callback->Call(context->Global(), argc, argv.get());
  46 }
  47
  48 GuestViewAttachRequest::GuestViewAttachRequest(
  49     GuestViewContainer* container,
  50     int guest_instance_id,
  51     scoped_ptr<base::DictionaryValue> params,
  52     v8::Local<v8::Function> callback,
  53     v8::Isolate* isolate)
  54     : GuestViewRequest(container, callback, isolate),
  55       guest_instance_id_(guest_instance_id),
  56       params_(params.Pass()) {
  57 }
  58
  59 GuestViewAttachRequest::~GuestViewAttachRequest() {
  60 }
  61
  62 void GuestViewAttachRequest::PerformRequest() {
  63   if (!container()->render_frame())
  64     return;
  65
  66   // Step 1, send the attach params to guest_view/.
  67   container()->render_frame()->Send(
  68       new GuestViewHostMsg_AttachGuest(container()->element_instance_id(),
  69                                        guest_instance_id_,
  70                                        *params_));
  71
  72   // Step 2, attach plugin through content/.
  73   container()->render_frame()->AttachGuest(container()->element_instance_id());
  74 }
  75
  76 void GuestViewAttachRequest::HandleResponse(const IPC::Message& message) {
  77   // TODO(fsamuel): Rename this message so that it's apparent that this is a
  78   // response to GuestViewHostMsg_AttachGuest. Perhaps
  79   // GuestViewMsg_AttachGuest_ACK?
  80   GuestViewMsg_GuestAttached::Param param;
  81   if (!GuestViewMsg_GuestAttached::Read(&message, &param))
  82     return;
  83
  84   content::RenderView* guest_proxy_render_view =
  85       content::RenderView::FromRoutingID(base::get<1>(param));
  86   // TODO(fsamuel): Should we be reporting an error to JavaScript or DCHECKing?
  87   if (!guest_proxy_render_view)
  88     return;
  89
  90   v8::HandleScope handle_scope(isolate());
  91   blink::WebFrame* frame = guest_proxy_render_view->GetWebView()->mainFrame();
  92   // TODO(lazyboy,nasko): The WebLocalFrame branch is not used when running
  93   // on top of out-of-process iframes. Remove it once the code is converted.
  94   v8::Local<v8::Value> window;
  95   if (frame->isWebLocalFrame()) {
  96     window = frame->mainWorldScriptContext()->Global();
  97   } else {
  98     window =
  99         frame->toWebRemoteFrame()->deprecatedMainWorldScriptContext()->Global();
 100   }
 101
 102   const int argc = 1;
 103   scoped_ptr<v8::Local<v8::Value>[]> argv(new v8::Local<v8::Value>[argc]);
 104   argv[0] = window;
 105
 106   // Call the AttachGuest API's callback with the guest proxy as the first
 107   // parameter.
 108   ExecuteCallbackIfAvailable(argc, argv.Pass());
 109 }
 110
 111 GuestViewDetachRequest::GuestViewDetachRequest(
 112     GuestViewContainer* container,
 113     v8::Local<v8::Function> callback,
 114     v8::Isolate* isolate)
 115     : GuestViewRequest(container, callback, isolate) {
 116 }
 117
 118 GuestViewDetachRequest::~GuestViewDetachRequest() {
 119 }
 120
 121 void GuestViewDetachRequest::PerformRequest() {
 122   if (!container()->render_frame())
 123     return;
 124
 125   container()->render_frame()->DetachGuest(container()->element_instance_id());
 126 }
 127
 128 void GuestViewDetachRequest::HandleResponse(const IPC::Message& message) {
 129   ExecuteCallbackIfAvailable(0 /* argc */, nullptr);
 130 }
 131
 132 }  // namespace guest_view