OSScreenSaver.h

/*
 *  Copyright (C) 2017-2018 Team Kodi
 *  This file is part of Kodi - https://kodi.tv
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 *  See LICENSES/README.md for more information.
 */

#pragma once

#include <memory>
#include <utility>

namespace KODI
{
namespace WINDOWING
{

class COSScreenSaverManager;

class COSScreenSaverInhibitor
{
public:
  COSScreenSaverInhibitor() noexcept;
  COSScreenSaverInhibitor(COSScreenSaverInhibitor&& other) noexcept;
  COSScreenSaverInhibitor& operator=(COSScreenSaverInhibitor&& other) noexcept;
  ~COSScreenSaverInhibitor() noexcept;
  void Release();
  bool IsActive() const;
  operator bool() const;

private:
  friend class COSScreenSaverManager;
  explicit COSScreenSaverInhibitor(COSScreenSaverManager* manager);
  bool m_active;
  COSScreenSaverManager* m_manager;

  COSScreenSaverInhibitor(COSScreenSaverInhibitor const& other) = delete;
  COSScreenSaverInhibitor& operator=(COSScreenSaverInhibitor const& other) = delete;
};

class IOSScreenSaver
{
public:
  virtual ~IOSScreenSaver() = default;
  virtual void Inhibit() = 0;
  virtual void Uninhibit() = 0;
};

class CDummyOSScreenSaver : public IOSScreenSaver
{
public:
  void Inhibit() override {}
  void Uninhibit() override {}
};

class COSScreenSaverManager
{
public:
  explicit COSScreenSaverManager(std::unique_ptr<IOSScreenSaver> impl);
  COSScreenSaverInhibitor CreateInhibitor();
  bool IsInhibited();

private:
  friend class COSScreenSaverInhibitor;
  void RemoveInhibitor();

  unsigned int m_inhibitionCount{0u};
  std::unique_ptr<IOSScreenSaver> m_impl;
};

}
}