Fix default of Chu Chess piece promotions

[xboard.git] / backend.c

diff --git a/backend.c b/backend.c
index 14967d6..39ec535 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -6558,6 +6558,7 @@ HasPromotionChoice (int fromX, int fromY, int toX, int toY, char *promoChoice, i
     if(appData.testLegality && !premove) {
        moveType = LegalityTest(boards[currentMove], PosFlags(currentMove),
                        fromY, fromX, toY, toX, IS_SHOGI(gameInfo.variant) || gameInfo.variant == VariantChuChess ? '+' : NULLCHAR);
+        if(moveType == IllegalMove) *promoChoice = NULLCHAR; // could be the fact we promoted was illegal
        if(moveType != WhitePromotion && moveType  != BlackPromotion)
            return FALSE;
     }
@@ -7491,8 +7492,11 @@ LeftClick (ClickType clickType, int xPix, int yPix)
        toY = y;
     }
 
+    piece = boards[currentMove][fromY][fromX];
+
     saveAnimate = appData.animate;
     if (clickType == Press) {
+       if(gameInfo.variant == VariantChuChess && piece != WhitePawn && piece != BlackPawn) defaultPromoChoice = piece;
        if(gameMode == EditPosition && boards[currentMove][fromY][fromX] == EmptySquare) {
            // must be Edit Position mode with empty-square selected
            fromX = x; fromY = y; DragPieceBegin(xPix, yPix, FALSE); dragging = 1; // consider this a new attempt to drag
@@ -7508,10 +7512,8 @@ LeftClick (ClickType clickType, int xPix, int yPix)
        if(marker[y][x] == 5) return; // [HGM] lion: to-click on cyan square; defer action to release
        if(legal[y][x] == 2 || HasPromotionChoice(fromX, fromY, toX, toY, &promoChoice, FALSE)) {
          if(appData.sweepSelect) {
-           ChessSquare piece = boards[currentMove][fromY][fromX];
            promoSweep = defaultPromoChoice;
-           if(gameInfo.variant == VariantChuChess && piece != WhitePawn && piece != BlackPawn) promoSweep = piece; else
-           if(PieceToChar(CHUPROMOTED piece) == '+') promoSweep = CHUPROMOTED piece;
+           if(gameInfo.variant != VariantChuChess && PieceToChar(CHUPROMOTED piece) == '+') promoSweep = CHUPROMOTED piece;
            selectFlag = 0; lastX = xPix; lastY = yPix;
            Sweep(0); // Pawn that is going to promote: preview promotion piece
            sweepSelecting = 1;
@@ -7543,6 +7545,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
            ClearHighlights();
        }
 #endif
+       if(gameInfo.variant == VariantChuChess && piece != WhitePawn && piece != BlackPawn) defaultPromoChoice = piece;
        if(marker[y][x] == 5) { // [HGM] lion: this was the release of a to-click or drag on a cyan square
          dragging *= 2;            // flag button-less dragging if we are dragging
          MarkTargetSquares(1);