/*
 * Copyright 2005, Haiku.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Axel Dörfler, axeld@pinc-software.de
 */
#ifndef SCREEN_MANAGER_H
#define SCREEN_MANAGER_H


#include <AutoDeleter.h>
#include <Looper.h>
#include <ObjectList.h>


class BMessage;

class DrawingEngine;
class HWInterface;
class HWInterfaceListener;
class Screen;


typedef BObjectList<Screen> ScreenList;


class ScreenOwner {
        public:
                virtual ~ScreenOwner() {};
                virtual void    ScreenRemoved(Screen* screen) = 0;
                virtual void    ScreenAdded(Screen* screen) = 0;
                virtual void    ScreenChanged(Screen* screen) = 0;

                virtual bool    ReleaseScreen(Screen* screen) = 0;
};


class ScreenManager : public BLooper {
        public:
                ScreenManager();
                virtual ~ScreenManager();

                Screen*                 ScreenAt(int32 index) const;
                int32                   CountScreens() const;

                status_t                AcquireScreens(ScreenOwner* owner, int32* wishList,
                                                        int32 wishCount, const char* target, bool force,
                                                        ScreenList& list);
                void                    ReleaseScreens(ScreenList& list);

                void                    ScreenChanged(Screen* screen);

                virtual void    MessageReceived(BMessage* message);

        private:
                struct screen_item {
                        ObjectDeleter<Screen>   screen;
                        ScreenOwner*                    owner;
                        ObjectDeleter<HWInterfaceListener>
                                                                        listener;
                };

                void                    _ScanDrivers();
                screen_item*    _AddHWInterface(HWInterface* interface);

                BObjectList<screen_item, true>  fScreenList;
};

extern ScreenManager *gScreenManager;

#endif  /* SCREEN_MANAGER_H */