/*
 *  Copyright 2019-2021 Diligent Graphics LLC
 *  Copyright 2015-2019 Egor Yusov
 *  
 *  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.
 *
 *  In no event and under no legal theory, whether in tort (including negligence), 
 *  contract, or otherwise, unless required by applicable law (such as deliberate 
 *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
 *  liable for any damages, including any direct, indirect, special, incidental, 
 *  or consequential damages of any character arising as a result of this License or 
 *  out of the use or inability to use the software (including but not limited to damages 
 *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
 *  all other commercial damages or losses), even if such Contributor has been advised 
 *  of the possibility of such damages.
 */

#pragma once

#include <memory>
#include <chrono>

#include "ImGuiImplDiligent.hpp"

struct _XCBKeySymbols;

namespace Diligent
{

class ImGuiImplLinuxXCB final : public ImGuiImplDiligent
{
public:
    ImGuiImplLinuxXCB(xcb_connection_t* connection,
                      IRenderDevice*    pDevice,
                      TEXTURE_FORMAT    BackBufferFmt,
                      TEXTURE_FORMAT    DepthBufferFmt,
                      Uint32            DisplayWidht,
                      Uint32            DisplayHeight,
                      Uint32            InitialVertexBufferSize = ImGuiImplDiligent::DefaultInitialVBSize,
                      Uint32            InitialIndexBufferSize  = ImGuiImplDiligent::DefaultInitialIBSize);
    ~ImGuiImplLinuxXCB();

    // clang-format off
    ImGuiImplLinuxXCB             (const ImGuiImplLinuxXCB&)  = delete;
    ImGuiImplLinuxXCB             (      ImGuiImplLinuxXCB&&) = delete;
    ImGuiImplLinuxXCB& operator = (const ImGuiImplLinuxXCB&)  = delete;
    ImGuiImplLinuxXCB& operator = (      ImGuiImplLinuxXCB&&) = delete;
    // clang-format on

    bool         HandleXCBEvent(xcb_generic_event_t* event);
    virtual void NewFrame(Uint32            RenderSurfaceWidth,
                          Uint32            RenderSurfaceHeight,
                          SURFACE_TRANSFORM SurfacePreTransform) override final;

private:
    void HandleKeyEvent(xcb_key_release_event_t* event);

    _XCBKeySymbols* m_syms = nullptr;

    std::chrono::time_point<std::chrono::high_resolution_clock> m_LastTimestamp = {};
};

} // namespace Diligent