src/variants/shogi/behaviour.cpp

   1 /*
   2   Copyright (c) 2007 Paolo Capriotti <p.capriotti@gmail.com>
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8 */
   9
  10 #include "behaviour.h"
  11
  12 #include <core/board.h>
  13 #include <core/color.h>
  14 #include <core/move.h>
  15 #include <core/piece.h>
  16 #include <core/poolcollection.h>
  17 #include <core/pool.h>
  18 #include <core/state.h>
  19
  20 #include <KDebug>
  21
  22 namespace Shogi {
  23
  24 Behaviour::Behaviour(IBehaviour* behaviour)
  25 : Delegators::Behaviour(behaviour)
  26 , m_delegator(this), m_promotionmanager(NULL) { }
  27
  28 IBehaviour* Behaviour::clone() const {
  29   Behaviour* b = new Behaviour(m_behaviour->clone());
  30   //FIXME: b->m_promotionmanager = m_promotionmanager->clone();
  31   b->m_promotionmanager = m_promotionmanager;
  32   return b;
  33 }
  34
  35 void Behaviour::captureOn(IState* state, const Point& square) const {
  36   Piece* captured = state->board()->get(square);
  37   if (captured != NULL && *captured != Piece()) {
  38     if (captured->get("promoted").toBool()) {
  39       captured->setType(m_promotionmanager->getDepromotion(captured->type()));
  40     }
  41     state->pools()->pool(opponent(captured->color()))->insert(-1, *captured);
  42   }
  43   m_behaviour->captureOn(state, square);
  44 }
  45
  46 bool Behaviour::mayPromote(const IState* state, const Move& move) const {
  47   // promoted piece cannot promote again
  48   if (move.promotion())
  49     return false;
  50
  51   // does that piece type can even promote ?
  52   if (promotionManager()->getPromotion(state->board()->get(move.src())->type()) == NULL)
  53     return false;
  54
  55   // move starts or ends on the promotion rows on the other side ?
  56   return ((state->turn() == Black::self()) ?
  57           (move.src().y >= state->board()->size().y - m_delegator->promotionZoneWidth() ||
  58            move.dst().y >= state->board()->size().y - m_delegator->promotionZoneWidth()) :
  59           (move.src().y < m_delegator->promotionZoneWidth() ||
  60            move.dst().y < m_delegator->promotionZoneWidth()));
  61 }
  62
  63 } // namespace Shogi