Fixed bug [1997299fff] - Tag borderwidth leaking

1 files changed, 47 insertions, 24 deletions

diff --git a/generic/tkTextDisp.c b/generic/tkTextDisp.c
index 6036222..cfe6e7a 100644
--- a/generic/tkTextDisp.c
+++ b/generic/tkTextDisp.c
@@ -2540,7 +2540,7 @@ DisplayLineBackground(
 				 * current x coordinate? */
     int matchRight;		/* Does line's style match its neighbor just
 				 * to the right of the current x-coord? */
-    int minX, maxX, xOffset;
+    int minX, maxX, xOffset, bw;
     StyleValues *sValuePtr;
     Display *display;
 #ifndef TK_NO_DOUBLE_BUFFERING
@@ -2611,16 +2611,25 @@ DisplayLineBackground(
 		rightX = leftX + 32767;
 	    }
 
+            /*
+             * Prevent the borders from leaking on adjacent characters,
+             * which would happen for too large border width.
+             */
+
+            bw = sValuePtr->borderWidth;
+            if (leftX + sValuePtr->borderWidth > rightX) {
+                bw = rightX - leftX;
+            }
+
 	    XFillRectangle(display, pixmap, chunkPtr->stylePtr->bgGC,
 		    leftX + xOffset, y, (unsigned int) (rightX - leftX),
 		    (unsigned int) dlPtr->height);
 	    if (sValuePtr->relief != TK_RELIEF_FLAT) {
 		Tk_3DVerticalBevel(textPtr->tkwin, pixmap, sValuePtr->border,
-			leftX + xOffset, y, sValuePtr->borderWidth,
-			dlPtr->height, 1, sValuePtr->relief);
+			leftX + xOffset, y, bw, dlPtr->height, 1,
+			sValuePtr->relief);
 		Tk_3DVerticalBevel(textPtr->tkwin, pixmap, sValuePtr->border,
-			rightX - sValuePtr->borderWidth + xOffset,
-			y, sValuePtr->borderWidth, dlPtr->height, 0,
+			rightX - bw + xOffset, y, bw, dlPtr->height, 0,
 			sValuePtr->relief);
 	    }
 	}
@@ -2717,22 +2726,29 @@ DisplayLineBackground(
 	matchRight = (nextPtr2 != NULL)
 		&& SAME_BACKGROUND(nextPtr2->stylePtr, chunkPtr->stylePtr);
 	if (matchLeft && !matchRight) {
+            bw = sValuePtr->borderWidth;
+            if (rightX2 - sValuePtr->borderWidth < leftX) {
+                bw = rightX2 - leftX;
+            }
 	    if (sValuePtr->relief != TK_RELIEF_FLAT) {
 		Tk_3DVerticalBevel(textPtr->tkwin, pixmap, sValuePtr->border,
-			rightX2 - sValuePtr->borderWidth + xOffset, y,
-			sValuePtr->borderWidth, sValuePtr->borderWidth, 0,
-			sValuePtr->relief);
+			rightX2 - bw + xOffset, y, bw,
+			sValuePtr->borderWidth, 0, sValuePtr->relief);
 	    }
-	    leftX = rightX2 - sValuePtr->borderWidth;
+            leftX = rightX2 - bw;
 	    leftXIn = 0;
 	} else if (!matchLeft && matchRight
 		&& (sValuePtr->relief != TK_RELIEF_FLAT)) {
+            bw = sValuePtr->borderWidth;
+            if (rightX2 + sValuePtr->borderWidth > rightX) {
+                bw = rightX - rightX2;
+            }
 	    Tk_3DVerticalBevel(textPtr->tkwin, pixmap, sValuePtr->border,
-		    rightX2 + xOffset, y, sValuePtr->borderWidth,
-		    sValuePtr->borderWidth, 1, sValuePtr->relief);
+		    rightX2 + xOffset, y, bw, sValuePtr->borderWidth,
+		    1, sValuePtr->relief);
 	    Tk_3DHorizontalBevel(textPtr->tkwin, pixmap, sValuePtr->border,
-		    leftX + xOffset, y, rightX2 + sValuePtr->borderWidth - 
-		    leftX, sValuePtr->borderWidth, leftXIn, 0, 1,
+		    leftX + xOffset, y, rightX2 + bw - leftX,
+		    sValuePtr->borderWidth, leftXIn, 0, 1,
 		    sValuePtr->relief);
 	}
 
@@ -2764,7 +2780,7 @@ DisplayLineBackground(
     chunkPtr2 = NULL;
     if (dlPtr->nextPtr != NULL && dlPtr->nextPtr->chunkPtr != NULL) {
 	/*
-	 * Find the chunk in the previous line that covers leftX.
+	 * Find the chunk in the next line that covers leftX.
 	 */
 
 	nextPtr2 = dlPtr->nextPtr->chunkPtr;
@@ -2820,26 +2836,33 @@ DisplayLineBackground(
 	matchRight = (nextPtr2 != NULL)
 		&& SAME_BACKGROUND(nextPtr2->stylePtr, chunkPtr->stylePtr);
 	if (matchLeft && !matchRight) {
+            bw = sValuePtr->borderWidth;
+            if (rightX2 - sValuePtr->borderWidth < leftX) {
+                bw = rightX2 - leftX;
+            }
 	    if (sValuePtr->relief != TK_RELIEF_FLAT) {
 		Tk_3DVerticalBevel(textPtr->tkwin, pixmap, sValuePtr->border,
-			rightX2 - sValuePtr->borderWidth + xOffset,
+			rightX2 - bw + xOffset,
 			y + dlPtr->height - sValuePtr->borderWidth,
-			sValuePtr->borderWidth, sValuePtr->borderWidth, 0,
-			sValuePtr->relief);
+			bw, sValuePtr->borderWidth, 0, sValuePtr->relief);
 	    }
-	    leftX = rightX2 - sValuePtr->borderWidth;
+	    leftX = rightX2 - bw;
 	    leftXIn = 1;
 	} else if (!matchLeft && matchRight
 		&& (sValuePtr->relief != TK_RELIEF_FLAT)) {
+            bw = sValuePtr->borderWidth;
+            if (rightX2 + sValuePtr->borderWidth > rightX) {
+                bw = rightX - rightX2;
+            }
 	    Tk_3DVerticalBevel(textPtr->tkwin, pixmap, sValuePtr->border,
-		    rightX2 + xOffset, y + dlPtr->height -
-		    sValuePtr->borderWidth, sValuePtr->borderWidth,
+		    rightX2 + xOffset,
+		    y + dlPtr->height - sValuePtr->borderWidth, bw,
 		    sValuePtr->borderWidth, 1, sValuePtr->relief);
 	    Tk_3DHorizontalBevel(textPtr->tkwin, pixmap, sValuePtr->border,
-		    leftX + xOffset, y + dlPtr->height -
-		    sValuePtr->borderWidth, rightX2 + sValuePtr->borderWidth -
-		    leftX, sValuePtr->borderWidth, leftXIn, 1, 0,
-		    sValuePtr->relief);
+		    leftX + xOffset,
+		    y + dlPtr->height - sValuePtr->borderWidth,
+		    rightX2 + bw - leftX, sValuePtr->borderWidth, leftXIn,
+		    1, 0, sValuePtr->relief);
 	}
 
     nextChunk2b: