/**********************************************************************
 *
 *   FreeDoko a Doppelkopf-Game
 *    
 *   Copyright (C) 2001-2010  by Diether Knof and Borg Enders
 *
 *   This program is free software; you can redistribute it and/or 
 *   modify it under the terms of the 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 can find this license in the file 'gpl.txt'.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, 
 *   MA  02111-1307  USA
 *
 *  Contact:
 *    Diether Knof dknof@gmx.de
 *    Borg Enders  borg@borgsoft.de
 *
 **********************************************************************/

#ifdef USE_UI_GTKMM

#ifndef GTKMM_THROWER_HEADER
#define GTKMM_THROWER_HEADER

#include "../../basistypes.h"
#include "../../card/card.h"

namespace UI_GTKMM_NS {

  /**
   **
   ** @brief	a thrower for exceptions
   **
   ** since gtkmm does not support exceptions, this class delays the throwing
   ** of exceptions
   **
   ** @author	Diether Knof
   **
   **/
  class Thrower {
    public:
      enum Type {
	NONE,
	GAMESTATUS,
	CARD
      }; // enum Type
      union Exception {
	GameStatus game_status;
	Card const* card;
      }; // union Exception
    public:
      Thrower();
      ~Thrower();

      // whether an exception will be thrown
      operator bool() const;
      // whether an exception will be thrown
      bool will_throw() const;
      // throws the exception
      void throw_it() throw(GameStatus, Card);
      // removes the exception
      void clear();

      // increment the depth
      void inc_depth();
      // decrement the depth, throw when '0' is reached
      void dec_depth();
      // set the depth -- only use if you know exactly why you need it!
      void set_depth(unsigned const depth);

      // saves the exception to throw later
      void operator()(GameStatus const gamestatus,
		      string const& file,
		      unsigned const line);
      void operator()(Card const& card,
		      string const& file,
		      unsigned const line);

    private:
	// the exception to throw
      PRIV_VAR_R(Exception, exception);
      // the type of exception
      PRIV_VAR_R(Type, exception_type);

      // the depth in the ui calls
      PRIV_VAR_R(unsigned, depth);

      // the following variables are used for bug tracking (double throwing)
      // the file of the throw
      string file;
      // the line number of the throw
      unsigned line;

  }; // class Thrower

} // namespace UI_GTKMM_NS

#endif // #ifdef GTKMM_THROWER_HEADER

#endif // #ifdef USE_UI_GTKMM
