| /* |
| * 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_ |