/*

 * Copyright (c) 2022 Huawei Device Co., Ltd.

 * 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 GRAPHIC_LITE_UI_TREE_MANAGER_H

#define GRAPHIC_LITE_UI_TREE_MANAGER_H

#include "components/ui_view.h"

#include "gfx_utils/list.h"



namespace OHOS {



class UITreeManager final : public HeapBase {

public:

    static UITreeManager &GetInstance();



    enum ViewLifeEvent {

        ADD,

        REMOVE

    };

    using ViewFunc = void();

    void RegistViewLifeEvent(ViewFunc* func);

    void UnregistViewLifeEvent(ViewFunc* func);

    void GetLastEvent(UIView*& view, ViewLifeEvent& event);

    void OnLifeEvent(UIView*, ViewLifeEvent);



private:

    List<ViewFunc*> lifeEvents_;

    UIView* lastEventView_;

    ViewLifeEvent lastEvent_;

};

} // namespace OHOS

#endif