/*
   Copyright (C) 2004,2005 Oswald Buddenhagen <ossi@kde.org>
   Copyright (C) 2005 Stephan Kulow <coolo@kde.org>

   This program is free software; you can redistribute it and/or
   modify it under the terms of the Lesser GNU General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.

   You should have received a copy of the Lesser GNU General Public License
   along with this program; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#ifndef KDISPLAYMANAGER_H
#define KDISPLAYMANAGER_H

#include "kworkspace.h"
#include <kdemacros.h>
#include <QtCore/QString>
#include <QtCore/QList>
#include <QtCore/QByteArray>

struct KDE_EXPORT SessEnt {
	QString display, from, user, session;
	int vt;
	bool self:1, tty:1;
};

typedef QList<SessEnt> SessList;

class KDE_EXPORT KDisplayManager {

#ifdef Q_WS_X11

public:
	KDisplayManager();
	~KDisplayManager();

	bool canShutdown();
	void shutdown( KWorkSpace::ShutdownType shutdownType,
	               KWorkSpace::ShutdownMode shutdownMode,
	               const QString &bootOption = QString() );

	void setLock( bool on );

	bool isSwitchable();
	int numReserve();
	void startReserve();
	bool localSessions( SessList &list );
	bool switchVT( int vt );
	void lockSwitchVT( int vt );

	bool bootOptions( QStringList &opts, int &dflt, int &curr );

	static QString sess2Str( const SessEnt &se );
	static void sess2Str2( const SessEnt &se, QString &user, QString &loc );

private:
	bool exec( const char *cmd, QByteArray &ret );
	bool exec( const char *cmd );

	void GDMAuthenticate();

#else // Q_WS_X11

public:
	KDisplayManager() {}

	bool canShutdown() { return false; }
	void shutdown( KWorkSpace::ShutdownType shutdownType,
	               KWorkSpace::ShutdownMode shutdownMode,
	               const QString &bootOption = QString() ) {}

	void setLock( bool ) {}

	bool isSwitchable() { return false; }
	int numReserve() { return -1; }
	void startReserve() {}
	bool localSessions( SessList &list ) { return false; }
	void switchVT( int vt ) {}

	bool bootOptions( QStringList &opts, int &dflt, int &curr );

#endif // Q_WS_X11

private:
#ifdef Q_WS_X11
    class Private;
    Private * const d;
#endif // Q_WS_X11

}; // class KDisplayManager

#endif // KDISPLAYMANAGER_H

