1 // Copyright 2013 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 "mojo/apps/js/bindings/waiting_callback.h" 6 7 #include "gin/per_context_data.h" 8 #include "gin/per_isolate_data.h" 9 10 namespace mojo { 11 namespace js { 12 13 namespace { 14 15 v8::Handle<v8::String> GetHiddenPropertyName(v8::Isolate* isolate) { 16 return gin::StringToSymbol(isolate, "::mojo::js::WaitingCallback"); 17 } 18 19 } // namespace 20 21 gin::WrapperInfo WaitingCallback::kWrapperInfo = { gin::kEmbedderNativeGin }; 22 23 WaitingCallback::WaitingCallback(v8::Isolate* isolate, 24 v8::Handle<v8::Function> callback) 25 : wait_id_() { 26 v8::Handle<v8::Context> context = isolate->GetCurrentContext(); 27 runner_ = gin::PerContextData::From(context)->runner()->GetWeakPtr(); 28 GetWrapper(isolate)->SetHiddenValue(GetHiddenPropertyName(isolate), callback); 29 } 30 31 WaitingCallback::~WaitingCallback() { 32 DCHECK(!wait_id_) << "Waiting callback was destroyed before being cancelled."; 33 } 34 35 gin::Handle<WaitingCallback> WaitingCallback::Create( 36 v8::Isolate* isolate, v8::Handle<v8::Function> callback) { 37 return gin::CreateHandle(isolate, new WaitingCallback(isolate, callback)); 38 } 39 40 void WaitingCallback::EnsureRegistered(v8::Isolate* isolate) { 41 gin::PerIsolateData* data = gin::PerIsolateData::From(isolate); 42 if (!data->GetObjectTemplate(&WaitingCallback::kWrapperInfo).IsEmpty()) { 43 return; 44 } 45 v8::Handle<v8::ObjectTemplate> templ = v8::ObjectTemplate::New(isolate); 46 templ->SetInternalFieldCount(gin::kNumberOfInternalFields); 47 data->SetObjectTemplate(&WaitingCallback::kWrapperInfo, templ); 48 } 49 50 void WaitingCallback::OnHandleReady(MojoResult result) { 51 wait_id_ = NULL; 52 53 if (!runner_) 54 return; 55 56 gin::Runner::Scope scope(runner_.get()); 57 v8::Isolate* isolate = runner_->isolate(); 58 59 v8::Handle<v8::Value> hidden_value = 60 GetWrapper(isolate)->GetHiddenValue(GetHiddenPropertyName(isolate)); 61 v8::Handle<v8::Function> callback; 62 CHECK(gin::ConvertFromV8(isolate, hidden_value, &callback)); 63 64 v8::Handle<v8::Value> args[] = { gin::ConvertToV8(isolate, result) }; 65 runner_->Call(callback, runner_->global(), 1, args); 66 } 67 68 } // namespace js 69 } // namespace mojo 70
