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// 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 "mojo/bindings/js/waiting_callback.h"
#include "gin/per_context_data.h"
#include "mojo/public/cpp/environment/environment.h"
namespace mojo {
namespace js {
namespace {
v8::Handle<v8::String> GetHiddenPropertyName(v8::Isolate* isolate) {
return gin::StringToSymbol(isolate, "::mojo::js::WaitingCallback");
}
} // namespace
gin::WrapperInfo WaitingCallback::kWrapperInfo = { gin::kEmbedderNativeGin };
// static
gin::Handle<WaitingCallback> WaitingCallback::Create(
v8::Isolate* isolate,
v8::Handle<v8::Function> callback,
mojo::Handle handle,
MojoHandleSignals signals) {
gin::Handle<WaitingCallback> waiting_callback =
gin::CreateHandle(isolate, new WaitingCallback(isolate, callback));
waiting_callback->wait_id_ = Environment::GetDefaultAsyncWaiter()->AsyncWait(
handle.value(),
signals,
MOJO_DEADLINE_INDEFINITE,
&WaitingCallback::CallOnHandleReady,
waiting_callback.get());
return waiting_callback;
}
void WaitingCallback::Cancel() {
if (!wait_id_)
return;
Environment::GetDefaultAsyncWaiter()->CancelWait(wait_id_);
wait_id_ = 0;
}
WaitingCallback::WaitingCallback(v8::Isolate* isolate,
v8::Handle<v8::Function> callback)
: wait_id_() {
v8::Handle<v8::Context> context = isolate->GetCurrentContext();
runner_ = gin::PerContextData::From(context)->runner()->GetWeakPtr();
GetWrapper(isolate)->SetHiddenValue(GetHiddenPropertyName(isolate), callback);
}
WaitingCallback::~WaitingCallback() {
Cancel();
}
// static
void WaitingCallback::CallOnHandleReady(void* closure, MojoResult result) {
static_cast<WaitingCallback*>(closure)->OnHandleReady(result);
}
void WaitingCallback::OnHandleReady(MojoResult result) {
wait_id_ = 0;
if (!runner_)
return;
gin::Runner::Scope scope(runner_.get());
v8::Isolate* isolate = runner_->GetContextHolder()->isolate();
v8::Handle<v8::Value> hidden_value =
GetWrapper(isolate)->GetHiddenValue(GetHiddenPropertyName(isolate));
v8::Handle<v8::Function> callback;
CHECK(gin::ConvertFromV8(isolate, hidden_value, &callback));
v8::Handle<v8::Value> args[] = { gin::ConvertToV8(isolate, result) };
runner_->Call(callback, runner_->global(), 1, args);
}
} // namespace js
} // namespace mojo
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