mojo/public/bindings/js/support.cc

// Copyright 2013 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 "mojo/public/bindings/js/support.h"

#include "base/bind.h"
#include "gin/arguments.h"
#include "gin/converter.h"
#include "gin/function_template.h"
#include "gin/per_isolate_data.h"
#include "gin/public/wrapper_info.h"
#include "gin/wrappable.h"
#include "mojo/public/bindings/js/handle.h"
#include "mojo/public/bindings/js/waiting_callback.h"
#include "mojo/public/bindings/lib/bindings_support.h"

namespace mojo {
namespace js {

namespace {

void AsyncWait(const v8::FunctionCallbackInfo<v8::Value>& info) {
  gin::Arguments args(info);

  mojo::Handle handle;
  MojoWaitFlags flags = MOJO_WAIT_FLAG_NONE;
  v8::Handle<v8::Function> callback;

  if (!args.GetNext(&handle) ||
      !args.GetNext(&flags) ||
      !args.GetNext(&callback))
    return args.ThrowError();

  scoped_refptr<WaitingCallback> waiting_callback =
      WaitingCallback::Create(args.isolate(), callback);

  BindingsSupport::AsyncWaitID wait_id = BindingsSupport::Get()->AsyncWait(
      handle, flags, waiting_callback.get());

  waiting_callback->set_wait_id(wait_id);

  args.Return(waiting_callback.get());
}

void CancelWait(WaitingCallback* waiting_callback) {
  if (!waiting_callback->wait_id())
    return;
  BindingsSupport::Get()->CancelWait(waiting_callback->wait_id());
  waiting_callback->set_wait_id(NULL);
}

gin::WrapperInfo g_wrapper_info = { gin::kEmbedderNativeGin };

}  // namespace

const char Support::kModuleName[] = "mojo/public/bindings/js/support";

v8::Local<v8::ObjectTemplate> Support::GetTemplate(v8::Isolate* isolate) {
  gin::PerIsolateData* data = gin::PerIsolateData::From(isolate);
  v8::Local<v8::ObjectTemplate> templ = data->GetObjectTemplate(
      &g_wrapper_info);

  if (templ.IsEmpty()) {
    WaitingCallback::EnsureRegistered(isolate);

    templ = v8::ObjectTemplate::New();

    templ->Set(gin::StringToSymbol(isolate, "asyncWait"),
               v8::FunctionTemplate::New(AsyncWait));
    templ->Set(gin::StringToSymbol(isolate, "cancelWait"),
               gin::CreateFunctionTemplate(isolate, base::Bind(CancelWait)));

    data->SetObjectTemplate(&g_wrapper_info, templ);
  }

  return templ;
}

}  // namespace js
}  // namespace mojo