seirawanboard.h

/*
    This file is part of Cute Chess.
    Copyright (C) 2008-2018 Cute Chess authors

    Cute Chess 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 3 of the License, or
    (at your option) any later version.

    Cute Chess 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 GNU General Public License
    along with Cute Chess.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef SEIRAWANBOARD_H
#define SEIRAWANBOARD_H

#include "westernboard.h"

namespace Chess {

class LIB_EXPORT SeirawanBoard : public WesternBoard
{
    public:
        SeirawanBoard();

        // Inherited from WesternBoard
        virtual Board* copy() const;
        virtual QString variant() const;
        virtual QString defaultFenString() const;

    protected:
        enum SeirawanPieceType
        {
            Hawk = King + 1, 
            Elephant     
        };

        // Inherited from WesternBoard
        virtual bool variantHasDrops() const;
        virtual bool variantHasChanneling(Side side, int square) const;
        virtual bool variantHasOptionalPromotions() const;
        virtual QList< Piece > reservePieceTypes() const;
        virtual void addPromotions(int sourceSquare,
                       int targetSquare,
                       QVarLengthArray<Move>& moves) const;
        virtual bool vSetFenString(const QStringList& fen);
        virtual bool parseCastlingRights(QChar c);
        virtual QString vFenString(FenNotation notation) const;
        virtual QString lanMoveString(const Move& move);
        virtual QString sanMoveString(const Move& move);
        virtual Move moveFromSanString(const QString& str);
        virtual Move moveFromLanString(const QString& str);
        virtual void vMakeMove(const Move& move,
                       BoardTransition* transition);
        virtual void vUndoMove(const Move& move);
        virtual void generateMovesForPiece(QVarLengthArray<Move>& moves,
                           int pieceType,
                           int square) const;
    private:
        QMap<int, int> m_squareMap;
        void insertIntoSquareMap(int square, int count = 0);
        void updateSquareMap(const Move& move, int increment);
        enum direction { forward, backward };
        /*
         * This method converts reserve piece types into/from
         * corresponding "virtual" helper piece types. Used for
         * disambiguation of channeling after castling towards GUI.
         */
        static int rookSquareChanneling(int promotion, direction d);
};

} // namespace Chess
#endif // SEIRAWANBOARD_H