/*
 * Copyright 2005, Axel Dörfler, axeld@pinc-software.de
 * All rights reserved. Distributed under the terms of the MIT License.
 *
 * Copyright 2010-2012 Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *      Hamish Morrison, hamish@lavabit.com
 *      Alexander von Gluck, kallisti5@unixzen.com
 */
#ifndef SETTINGS_H
#define SETTINGS_H


#include <stdio.h>
#include <stdlib.h>

#include <Point.h>


static const int32 kErrorSettingsNotFound = B_ERRORS_END + 1;
static const int32 kErrorSettingsInvalid = B_ERRORS_END + 2;
static const int32 kErrorVolumeNotFound = B_ERRORS_END + 3;


class Settings {
public:
                                                        Settings();

                        bool                    SwapEnabled() const
                                                                { return fCurrentSettings.enabled; }
                        bool                    SwapAutomatic() const
                                                                { return fCurrentSettings.automatic; }
                        off_t                   SwapSize() const { return fCurrentSettings.size; }
                        dev_t                   SwapVolume() { return fCurrentSettings.volume; }
                        BPoint                  WindowPosition() const { return fWindowPosition; }


                        void                    SetSwapEnabled(bool enabled,
                                                                bool revertable = true);
                        void                    SetSwapAutomatic(bool automatic,
                                                                bool revertable = true);
                        void                    SetSwapSize(off_t size, bool revertable = true);
                        void                    SetSwapVolume(dev_t volume,
                                                                bool revertable = true);
                        void                    SetWindowPosition(BPoint position);

                        status_t                ReadWindowSettings();
                        status_t                WriteWindowSettings();
                        status_t                ReadSwapSettings();
                        status_t                WriteSwapSettings();

                        bool                    IsRevertable();
                        void                    RevertSwapSettings();

                        bool                    IsDefaultable();
                        void                    DefaultSwapSettings(bool revertable = true);
private:
                        struct SwapSettings {
                                bool enabled;
                                bool automatic;
                                off_t size;
                                dev_t volume;
                        };

                        BPoint                  fWindowPosition;

                        SwapSettings    fCurrentSettings;
                        SwapSettings    fInitialSettings;
                        SwapSettings    fDefaultSettings;
};

#endif  /* SETTINGS_H */