WebKit/Source/platform/bindings/ScriptWrappable.cpp

// 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 "platform/bindings/ScriptWrappable.h"

#include "platform/bindings/DOMDataStore.h"
#include "platform/bindings/ScriptWrappableVisitor.h"
#include "platform/bindings/V8DOMWrapper.h"

namespace blink {

struct SameSizeAsScriptWrappable {
  virtual ~SameSizeAsScriptWrappable() = default;
  v8::Persistent<v8::Object> main_world_wrapper_;
};

static_assert(sizeof(ScriptWrappable) <= sizeof(SameSizeAsScriptWrappable),
              "ScriptWrappable should stay small");

v8::Local<v8::Object> ScriptWrappable::Wrap(
    v8::Isolate* isolate,
    v8::Local<v8::Object> creation_context) {
  const WrapperTypeInfo* wrapper_type_info = this->GetWrapperTypeInfo();

  DCHECK(!DOMDataStore::ContainsWrapper(this, isolate));

  v8::Local<v8::Object> wrapper =
      V8DOMWrapper::CreateWrapper(isolate, creation_context, wrapper_type_info);
  DCHECK(!wrapper.IsEmpty());
  return AssociateWithWrapper(isolate, wrapper_type_info, wrapper);
}

v8::Local<v8::Object> ScriptWrappable::AssociateWithWrapper(
    v8::Isolate* isolate,
    const WrapperTypeInfo* wrapper_type_info,
    v8::Local<v8::Object> wrapper) {
  return V8DOMWrapper::AssociateObjectWithWrapper(isolate, this,
                                                  wrapper_type_info, wrapper);
}

void ScriptWrappable::TraceWrappers(
    const ScriptWrappableVisitor* visitor) const {
  visitor->TraceWrappers(main_world_wrapper_);
  DOMWrapperWorld::TraceWrappers(this, visitor);
}

}  // namespace blink