| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "extensions/renderer/render_frame_observer_natives.h" |
| |
| #include "base/bind.h" |
| #include "base/message_loop/message_loop.h" |
| #include "content/public/renderer/render_frame.h" |
| #include "content/public/renderer/render_frame_observer.h" |
| #include "extensions/renderer/extension_frame_helper.h" |
| #include "extensions/renderer/script_context.h" |
| |
| namespace extensions { |
| |
| namespace { |
| |
| // Deletes itself when done. |
| class LoadWatcher : public content::RenderFrameObserver { |
| public: |
| LoadWatcher(ScriptContext* context, |
| content::RenderFrame* frame, |
| v8::Local<v8::Function> cb) |
| : content::RenderFrameObserver(frame), |
| context_(context), |
| callback_(context->isolate(), cb) { |
| if (ExtensionFrameHelper::Get(frame)-> |
| did_create_current_document_element()) { |
| // If the document element is already created, then we can call the |
| // callback immediately (though post it to the message loop so as to not |
| // call it re-entrantly). |
| // The Unretained is safe because this class manages its own lifetime. |
| base::MessageLoop::current()->PostTask( |
| FROM_HERE, |
| base::Bind(&LoadWatcher::CallbackAndDie, base::Unretained(this), |
| true)); |
| } |
| } |
| |
| void DidCreateDocumentElement() override { CallbackAndDie(true); } |
| |
| void DidFailProvisionalLoad(const blink::WebURLError& error) override { |
| CallbackAndDie(false); |
| } |
| |
| private: |
| void CallbackAndDie(bool succeeded) { |
| v8::Isolate* isolate = context_->isolate(); |
| v8::HandleScope handle_scope(isolate); |
| v8::Local<v8::Value> args[] = {v8::Boolean::New(isolate, succeeded)}; |
| context_->CallFunction(v8::Local<v8::Function>::New(isolate, callback_), |
| arraysize(args), args); |
| delete this; |
| } |
| |
| ScriptContext* context_; |
| v8::Global<v8::Function> callback_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LoadWatcher); |
| }; |
| |
| } // namespace |
| |
| RenderFrameObserverNatives::RenderFrameObserverNatives(ScriptContext* context) |
| : ObjectBackedNativeHandler(context) { |
| RouteFunction( |
| "OnDocumentElementCreated", |
| base::Bind(&RenderFrameObserverNatives::OnDocumentElementCreated, |
| base::Unretained(this))); |
| } |
| |
| void RenderFrameObserverNatives::OnDocumentElementCreated( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| CHECK(args.Length() == 2); |
| CHECK(args[0]->IsInt32()); |
| CHECK(args[1]->IsFunction()); |
| |
| int frame_id = args[0]->Int32Value(); |
| |
| content::RenderFrame* frame = content::RenderFrame::FromRoutingID(frame_id); |
| if (!frame) { |
| LOG(WARNING) << "No render frame found to register LoadWatcher."; |
| return; |
| } |
| |
| new LoadWatcher(context(), frame, args[1].As<v8::Function>()); |
| |
| args.GetReturnValue().Set(true); |
| } |
| |
| } // namespace extensions |