private bool TraceSub(Cell tracingCell, StoneType putStoneType, Position.Direction dir, ActionForSandwichedStoneDelegate action)
{
if (tracingCell == null)
{
return(false);
}
if (tracingCell.Stone == null)
{
return(false);
}
if (putStoneType.Equals(tracingCell.Stone))
{
return(true);
}
var neighberCell = board.GetNeighberCell(tracingCell.Position, dir);
bool isSandwiched = TraceSub(neighberCell, putStoneType, dir, action);
if (isSandwiched)
{
action(tracingCell);
}
return(isSandwiched);
}
public Cell GetNeighberCell(Position position, Position.Direction direction)
{
if (!IsValidRange(position))
{
throw new ArgumentOutOfRangeException("Invalid position");
}
var neighberPosition = new Position(position.X + direction.dX, position.Y + direction.dY);
if (!IsValidRange(neighberPosition))
{
return(null);
}
return(Cell(neighberPosition));
}