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// Copyright 2016 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_SCRIPT_MOZJS_MOZJS_WRAPPER_HANDLE_H_
#define COBALT_SCRIPT_MOZJS_MOZJS_WRAPPER_HANDLE_H_
#include "base/memory/weak_ptr.h"
#include "cobalt/base/polymorphic_downcast.h"
#include "cobalt/script/mozjs/wrapper_private.h"
#include "cobalt/script/wrappable.h"
namespace cobalt {
namespace script {
namespace mozjs {
// Implements Wrappable::WeakWrapperHandler and thus represents the cached
// JS wrapper for a given Wrappable. The Wrapper could be garbage collected
// at any time.
class MozjsWrapperHandle : public Wrappable::WeakWrapperHandle {
public:
explicit MozjsWrapperHandle(WrapperPrivate* wrapper_private) {
DCHECK(wrapper_private);
weak_wrapper_private_ = wrapper_private->AsWeakPtr();
}
static JSObject* GetObjectProxy(const Wrappable::WeakWrapperHandle* handle) {
if (handle) {
const MozjsWrapperHandle* mozjs_handle =
base::polymorphic_downcast<const MozjsWrapperHandle*>(handle);
if (mozjs_handle->weak_wrapper_private_) {
return mozjs_handle->weak_wrapper_private_->js_object_proxy();
}
}
return NULL;
}
private:
base::WeakPtr<WrapperPrivate> weak_wrapper_private_;
};
} // namespace mozjs
} // namespace script
} // namespace cobalt
#endif // COBALT_SCRIPT_MOZJS_MOZJS_WRAPPER_HANDLE_H_