60 lines
1.3 KiB
Swift
60 lines
1.3 KiB
Swift
final class Bishop: Piece, DiagonalMoves {
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override var unicodeRepresentation: String {
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return color == .Black ? "♝" : "♗"
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}
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override var pseudoLegalPositions: [Square.Position] {
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return getDiagonalMoves(from: position)
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}
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override func getLegalPosition() {
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legalPositions = []
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var last: Square.Position? = nil
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for position in pseudoLegalPositions {
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if !isLegal(on: position) {
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last = position
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continue
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}
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if !DiagonalDirection.isLegal(last: &last, current: position) {
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last = nil
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}
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if last == nil {
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legalPositions.append(position)
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if let square = delegate?.getSquareInfo(on: position),
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let piece = square.piece
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{
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if piece.color != color {
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if let king = piece as? King {
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delegate?.notify(.kingInCheck(self, on: king))
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legalPositions.removeLast()
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last = position
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return
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} else {
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delegate?.notify(
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.piecePinned(from: self, on: piece))
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last = position
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}
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}
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}
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delegate?.addPieceToTarget(self, target: position)
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}
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}
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}
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override func isLegal(on pos: Square.Position) -> Bool {
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if let s = delegate?.getSquareInfo(on: pos), let p = s.piece,
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p.color == color
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{
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return false
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}
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return true
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}
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init(with color: Color, on position: Square.Position) {
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super.init(kind: .Bishop, on: position, with: color)
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}
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}
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