src/variants/shogi/faces/lance.cpp

   1 /*
   2   Copyright (c) 2007 Paolo Capriotti <p.capriotti@gmail.com>
   3             (c) 2007 Maurizio Monge <maurizio.monge@kdemail.net>
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9 */
  10
  11 #include "lance.h"
  12 #include <core/behaviour.h>
  13 #include <core/board.h>
  14 #include <core/move.h>
  15 #include <core/pathinfo.h>
  16 #include <core/state.h>
  17
  18 namespace Shogi {
  19 namespace Faces {
  20
  21 Lance::Lance() { }
  22
  23 QString Lance::name() const { return "lance"; }
  24
  25 bool Lance::canMove(const Piece& piece, const Piece&,
  26                    Move& move, const IState* state) const {
  27   const IBehaviour* behaviour = state->behaviour();
  28   if (!behaviour) return false;
  29   PathInfo path = state->board()->path(move.src(), move.dst());
  30   return move.delta().x == 0 &&
  31     path.clear() &&
  32     (move.delta().y * behaviour->direction(piece.color()).y > 0);
  33 }
  34
  35 int Lance::index() const { return 40; }
  36
  37 Lance* Lance::self() {
  38   static Lance s_instance;
  39   return &s_instance;
  40 }
  41
  42 }
  43 }