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// 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 "gin/wrappable.h"
#include "base/logging.h"
#include "gin/per_isolate_data.h"
namespace gin {
Wrappable::Wrappable() {
}
Wrappable::~Wrappable() {
wrapper_.Reset();
}
void Wrappable::WeakCallback(
const v8::WeakCallbackData<v8::Object, Wrappable>& data) {
Wrappable* wrappable = data.GetParameter();
wrappable->wrapper_.Reset();
wrappable->Release(); // Balanced in Wrappable::ConfigureWrapper.
}
v8::Handle<v8::Object> Wrappable::CreateWrapper(v8::Isolate* isolate) {
WrapperInfo* info = GetWrapperInfo();
PerIsolateData* data = PerIsolateData::From(isolate);
v8::Local<v8::ObjectTemplate> templ = data->GetObjectTemplate(info);
CHECK(!templ.IsEmpty()); // Don't forget to register an object template.
CHECK(templ->InternalFieldCount() == kNumberOfInternalFields);
v8::Handle<v8::Object> wrapper = templ->NewInstance();
wrapper->SetAlignedPointerInInternalField(kWrapperInfoIndex, info);
wrapper->SetAlignedPointerInInternalField(kEncodedValueIndex, this);
wrapper_.Reset(isolate, wrapper);
AddRef(); // Balanced in Wrappable::WeakCallback.
wrapper_.SetWeak(this, WeakCallback);
return wrapper;
}
v8::Handle<v8::Value> Converter<Wrappable*>::ToV8(v8::Isolate* isolate,
Wrappable* val) {
if (val->wrapper_.IsEmpty())
return val->CreateWrapper(isolate);
return v8::Local<v8::Object>::New(isolate, val->wrapper_);
}
bool Converter<Wrappable*>::FromV8(v8::Handle<v8::Value> val,
Wrappable** out) {
if (!val->IsObject())
return false;
v8::Handle<v8::Object> obj = v8::Handle<v8::Object>::Cast(val);
WrapperInfo* info = WrapperInfo::From(obj);
if (!info)
return false;
void* pointer = obj->GetAlignedPointerFromInternalField(kEncodedValueIndex);
Wrappable* wrappable = static_cast<Wrappable*>(pointer);
CHECK(wrappable->GetWrapperInfo() == info); // Security check for cast above.
*out = wrappable;
return true;
}
} // namespace gin
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