X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=backend.c;h=1a3014877f85513d5a6abbdf356de8bd5ba6de7d;hb=afd442f06122e6d80024d655aa91e13b1e69599f;hp=4c302506665e1ea5660285e9a1b4e8b840a6590d;hpb=913d225a639d57b15e06f980d678871bd5556867;p=xboard.git

diff --git a/backend.c b/backend.c
index 4c30250..1a30148 100644
--- a/backend.c
+++ b/backend.c
@@ -269,6 +269,7 @@ char chatPartner[MAX_CHAT][MSG_SIZ]; /* [HGM] chat: list of chatting partners */
 extern int chatCount;
 int chattingPartner;
 char marker[BOARD_RANKS][BOARD_FILES]; /* [HGM] marks for target squares */
+char legal[BOARD_RANKS][BOARD_FILES];  /* [HGM] legal target squares */
 char lastMsg[MSG_SIZ];
 ChessSquare pieceSweep = EmptySquare;
 ChessSquare promoSweep = EmptySquare, defaultPromoChoice;
@@ -825,6 +826,7 @@ InitEngine (ChessProgramState *cps, int n)
     cps->scoreIsAbsolute = appData.scoreIsAbsolute[n]; /* [AS] */
     cps->isUCI = appData.isUCI[n]; /* [AS] */
     cps->hasOwnBookUCI = appData.hasOwnBookUCI[n]; /* [AS] */
+    cps->highlight = 0;
 
     if (appData.protocolVersion[n] > PROTOVER
 	|| appData.protocolVersion[n] < 1)
@@ -7014,6 +7016,39 @@ FinishMove (ChessMove moveType, int fromX, int fromY, int toX, int toY, int prom
 }
 
 void
+MarkByFEN(char *fen)
+{
+	int r, f;
+	if(!appData.markers || !appData.highlightDragging) return;
+	for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) legal[r][f] = 0;
+	r=BOARD_HEIGHT-1; f=BOARD_LEFT;
+	while(*fen) {
+	    int s = 0;
+	    marker[r][f] = 0;
+	    if(*fen == 'M') legal[r][f] = 2; else // request promotion choice
+	    if(*fen >= 'A' && *fen <= 'Z') legal[r][f] = 1; else
+	    if(*fen >= 'a' && *fen <= 'z') *fen += 'A' - 'a';
+	    if(*fen == '/' && f > BOARD_LEFT) f = BOARD_LEFT, r--; else
+	    if(*fen == 'T') marker[r][f++] = 0; else
+	    if(*fen == 'Y') marker[r][f++] = 1; else
+	    if(*fen == 'G') marker[r][f++] = 3; else
+	    if(*fen == 'B') marker[r][f++] = 4; else
+	    if(*fen == 'C') marker[r][f++] = 5; else
+	    if(*fen == 'M') marker[r][f++] = 6; else
+	    if(*fen == 'W') marker[r][f++] = 7; else
+	    if(*fen == 'D') marker[r][f++] = 8; else
+	    if(*fen == 'R') marker[r][f++] = 2; else {
+		while(*fen <= '9' && *fen >= '0') s = 10*s + *fen++ - '0';
+	      f += s; fen -= s>0;
+	    }
+	    while(f >= BOARD_RGHT) f -= BOARD_RGHT - BOARD_LEFT, r--;
+	    if(r < 0) break;
+	    fen++;
+	}
+	DrawPosition(TRUE, NULL);
+}
+
+void
 Mark (Board board, int flags, ChessMove kind, int rf, int ff, int rt, int ft, VOIDSTAR closure)
 {
     typedef char Markers[BOARD_RANKS][BOARD_FILES];
@@ -7028,13 +7063,14 @@ Mark (Board board, int flags, ChessMove kind, int rf, int ff, int rt, int ft, VO
 void
 MarkTargetSquares (int clear)
 {
-  int x, y;
-  if(clear) // no reason to ever suppress clearing
-    for(x=0; x<BOARD_WIDTH; x++) for(y=0; y<BOARD_HEIGHT; y++) marker[y][x] = 0;
-  if(!appData.markers || !appData.highlightDragging || appData.icsActive && gameInfo.variant < VariantShogi ||
-     !appData.testLegality || gameMode == EditPosition) return;
-  if(!clear) {
+  int x, y, sum=0;
+  if(clear) { // no reason to ever suppress clearing
+    for(x=0; x<BOARD_WIDTH; x++) for(y=0; y<BOARD_HEIGHT; y++) sum += marker[y][x], marker[y][x] = 0;
+    if(!sum) return; // nothing was cleared,no redraw needed
+  } else {
     int capt = 0;
+    if(!appData.markers || !appData.highlightDragging || appData.icsActive && gameInfo.variant < VariantShogi ||
+       !appData.testLegality || gameMode == EditPosition) return;
     GenLegal(boards[currentMove], PosFlags(currentMove), Mark, (void*) marker, EmptySquare);
     if(PosFlags(0) & F_MANDATORY_CAPTURE) {
       for(x=0; x<BOARD_WIDTH; x++) for(y=0; y<BOARD_HEIGHT; y++) if(marker[y][x]>1) capt++;
@@ -7077,6 +7113,39 @@ CanPromote (ChessSquare piece, int y)
 }
 
 void
+HoverEvent (int hiX, int hiY, int x, int y)
+{
+	static char baseMarker[BOARD_RANKS][BOARD_FILES], baseLegal[BOARD_RANKS][BOARD_FILES];
+	int r, f;
+	if(!first.highlight) return;
+	if(hiX == -1 && hiY == -1 && x == fromX && y == fromY) // record markings 
+	  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++)
+	    baseMarker[r][f] = marker[r][f], baseLegal[r][f] = legal[r][f];
+	else if(hiX != x || hiY != y) {
+	  // [HGM] lift: entered new to-square; redraw arrow, and inform engine
+	  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++)
+	    marker[r][f] = baseMarker[r][f], legal[r][f] = baseLegal[r][f];
+	  if((marker[y][x] == 2 || marker[y][x] == 6) && legal[y][x]) {
+ 	    char buf[MSG_SIZ];
+	    snprintf(buf, MSG_SIZ, "hover %c%d\n", x + AAA, y + ONE - '0');
+	    SendToProgram(buf, &first);
+	  }
+	  SetHighlights(fromX, fromY, x, y);
+	}
+}
+
+void ReportClick(char *action, int x, int y)
+{
+	char buf[MSG_SIZ]; // Inform engine of what user does
+	int r, f;
+	if(action[0] == 'l') // mark any target square of a lifted piece as legal to-square, clear markers
+	  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) legal[r][f] = 1, marker[r][f] = 0;
+	if(!first.highlight || gameMode == EditPosition) return;
+	snprintf(buf, MSG_SIZ, "%s %c%d%s\n", action, x+AAA, y+ONE-'0', controlKey && action[0]=='p' ? "," : "");
+	SendToProgram(buf, &first);
+}
+
+void
 LeftClick (ClickType clickType, int xPix, int yPix)
 {
     int x, y;
@@ -7175,6 +7244,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	    /* First square */
 	    if (OKToStartUserMove(fromX, fromY)) {
 		second = 0;
+		ReportClick("lift", x, y);
 		MarkTargetSquares(0);
 		if(gameMode == EditPosition && controlKey) gatingPiece = boards[currentMove][fromY][fromX];
 		DragPieceBegin(xPix, yPix, FALSE); dragging = 1;
@@ -7223,7 +7293,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	    }
 	    promoDefaultAltered = FALSE;
 	    MarkTargetSquares(1);
-	   if(!second || appData.oneClick && !OnlyMove(&x, &y, TRUE)) {
+	   if(!(second && appData.oneClick && OnlyMove(&x, &y, TRUE))) {
 	    if (appData.highlightDragging) {
 		SetHighlights(x, y, -1, -1);
 	    } else {
@@ -7237,6 +7307,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 		else gatingPiece = doubleClick ? fromP : EmptySquare;
 		fromX = x;
 		fromY = y; dragging = 1;
+		ReportClick("lift", x, y);
 		MarkTargetSquares(0);
 		DragPieceBegin(xPix, yPix, FALSE);
 		if(appData.sweepSelect && CanPromote(piece = boards[currentMove][y][x], y)) {
@@ -7273,6 +7344,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	    second = sweepSelecting = 0;
 	    fromX = fromY = -1;
 	    gatingPiece = EmptySquare;
+	    MarkTargetSquares(1);
 	    ClearHighlights();
 	    gotPremove = 0;
 	    ClearPremoveHighlights();
@@ -7285,6 +7357,13 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 
     clearFlag = 0;
 
+    if(gameMode != EditPosition && !appData.testLegality && !legal[y][x]) {
+	if(dragging) DragPieceEnd(xPix, yPix), dragging = 0;
+	DisplayMessage(_("only marked squares are legal"),"");
+	DrawPosition(TRUE, NULL);
+	return; // ignore to-click
+    }
+
     /* we now have a different from- and (possibly off-board) to-square */
     /* Completed move */
     if(!sweepSelecting) {
@@ -7300,7 +7379,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	    if(x >= BOARD_LEFT && x < BOARD_RGHT) clearFlag = 1; // and defer click-click move of empty-square to up-click
 	    return;
 	}
-	if(HasPromotionChoice(fromX, fromY, toX, toY, &promoChoice, FALSE)) {
+	if(legal[y][x] == 2 || HasPromotionChoice(fromX, fromY, toX, toY, &promoChoice, FALSE)) {
 	  if(appData.sweepSelect) {
 	    ChessSquare piece = boards[currentMove][fromY][fromX];
 	    promoSweep = defaultPromoChoice;
@@ -7364,6 +7443,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 
     // off-board moves should not be highlighted
     if(x < 0 || y < 0) ClearHighlights();
+    else ReportClick("put", x, y);
 
     if(gatingPiece != EmptySquare && gameInfo.variant == VariantSChess) promoChoice = ToLower(PieceToChar(gatingPiece));
 
@@ -8580,6 +8660,11 @@ if(appData.debugMode) fprintf(debugFP, "nodes = %d, %lld\n", (int) programStats.
     if (sscanf(message, "pong %d", &cps->lastPong) == 1) {
 	return;
     }
+    if(!strncmp(message, "highlight ", 10)) {
+	if(appData.testLegality && appData.markers) return;
+	MarkByFEN(message+10); // [HGM] alien: allow engine to mark board squares
+	return;
+    }
     /*
      * If the move is illegal, cancel it and redraw the board.
      * Also deal with other error cases.  Matching is rather loose
@@ -16176,6 +16261,7 @@ ParseFeatures (char *args, ChessProgramState *cps)
     /* End of additions by Tord */
 
     /* [HGM] added features: */
+    if (BoolFeature(&p, "highlight", &cps->highlight, cps)) continue;
     if (BoolFeature(&p, "debug", &cps->debug, cps)) continue;
     if (BoolFeature(&p, "nps", &cps->supportsNPS, cps)) continue;
     if (IntFeature(&p, "level", &cps->maxNrOfSessions, cps)) continue;