Let second click on piece make only capture, with -oneClickMove

[xboard.git] / backend.c

diff --git a/backend.c b/backend.c
index 387f87c..42f434e 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -5552,7 +5552,7 @@ OKToStartUserMove(x, y)
 }
 
 Boolean
-OnlyMove(int *x, int *y) {
+OnlyMove(int *x, int *y, Boolean captures) {
     DisambiguateClosure cl;
     if (appData.zippyPlay) return FALSE;
     switch(gameMode) {
@@ -5576,6 +5576,7 @@ OnlyMove(int *x, int *y) {
     cl.promoCharIn = NULLCHAR;
     Disambiguate(boards[currentMove], PosFlags(currentMove), &cl);
     if( cl.kind == NormalMove ||
+       cl.kind == AmbiguousMove && captures && cl.captures == 1 ||
        cl.kind == WhitePromotionQueen || cl.kind == BlackPromotionQueen ||
        cl.kind == WhitePromotionKnight || cl.kind == BlackPromotionKnight ||
        cl.kind == WhiteCapturesEnPassant || cl.kind == BlackCapturesEnPassant) {
@@ -5594,6 +5595,7 @@ OnlyMove(int *x, int *y) {
     cl.promoCharIn = NULLCHAR;
     Disambiguate(boards[currentMove], PosFlags(currentMove), &cl);
     if( cl.kind == NormalMove ||
+       cl.kind == AmbiguousMove && captures && cl.captures == 1 ||
        cl.kind == WhitePromotionQueen || cl.kind == BlackPromotionQueen ||
        cl.kind == WhitePromotionKnight || cl.kind == BlackPromotionKnight ||
        cl.kind == WhiteCapturesEnPassant || cl.kind == BlackCapturesEnPassant) {
@@ -6099,7 +6101,7 @@ void LeftClick(ClickType clickType, int xPix, int yPix)
     autoQueen = appData.alwaysPromoteToQueen;
 
     if (fromX == -1) {
-      if(!appData.oneClick || !OnlyMove(&x, &y)) {
+      if(!appData.oneClick || !OnlyMove(&x, &y, FALSE)) {
        if (clickType == Press) {
            /* First square */
            if (OKToStartUserMove(x, y)) {
@@ -6140,6 +6142,7 @@ void LeftClick(ClickType clickType, int xPix, int yPix)
             !(fromP == BlackKing && toP == BlackRook && frc))) {
            /* Clicked again on same color piece -- changed his mind */
            second = (x == fromX && y == fromY);
+          if(!second || !OnlyMove(&x, &y, TRUE)) {
            if (appData.highlightDragging) {
                SetHighlights(x, y, -1, -1);
            } else {
@@ -6152,6 +6155,7 @@ void LeftClick(ClickType clickType, int xPix, int yPix)
                DragPieceBegin(xPix, yPix);
            }
            return;
+          }
        }
        // ignore clicks on holdings
        if(x < BOARD_LEFT || x >= BOARD_RGHT) return;