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-rw-r--r--generic/tkTextDisp.c118
1 files changed, 67 insertions, 51 deletions
diff --git a/generic/tkTextDisp.c b/generic/tkTextDisp.c
index c3ea9e0..3d442af 100644
--- a/generic/tkTextDisp.c
+++ b/generic/tkTextDisp.c
@@ -5056,19 +5056,20 @@ TkTextSetYView(
*/
dlPtr = NULL;
- } else if ((dlPtr->index.linePtr == indexPtr->linePtr)
- && (dlPtr->index.byteIndex <= indexPtr->byteIndex)) {
- if (dInfoPtr->dLinePtr == dlPtr && dInfoPtr->topPixelOffset != 0) {
- /*
- * It is on the top line, but that line is hanging off the top
- * of the screen. Change the top overlap to zero and update.
- */
-
- dInfoPtr->newTopPixelOffset = 0;
- goto scheduleUpdate;
- }
- return;
- }
+ } else {
+ if (TkTextIndexCmp(&dlPtr->index, indexPtr) <= 0) {
+ if (dInfoPtr->dLinePtr == dlPtr && dInfoPtr->topPixelOffset != 0) {
+ /*
+ * It is on the top line, but that line is hanging off the top
+ * of the screen. Change the top overlap to zero and update.
+ */
+
+ dInfoPtr->newTopPixelOffset = 0;
+ goto scheduleUpdate;
+ }
+ return;
+ }
+ }
}
/*
@@ -5379,8 +5380,8 @@ TkTextSeeCmd(
}
/*
- * Find the chunk that contains the desired index. dlPtr may be NULL if
- * the widget is not mapped. [Bug #641778]
+ * Find the display line containing the desired index. dlPtr may be NULL
+ * if the widget is not mapped. [Bug #641778]
*/
dlPtr = FindDLine(textPtr, dInfoPtr->dLinePtr, &index);
@@ -5388,7 +5389,16 @@ TkTextSeeCmd(
return TCL_OK;
}
- byteCount = index.byteIndex - dlPtr->index.byteIndex;
+ /*
+ * Find the chunk within the display line that contains the desired
+ * index. The chunks making the display line are skipped up to but not
+ * including the one crossing index. Skipping is done based on a
+ * byteCount offset possibly spanning several logical lines in case
+ * they are elided.
+ */
+
+ byteCount = TkTextIndexCount(textPtr, &dlPtr->index, &index,
+ COUNT_INDICES);
for (chunkPtr = dlPtr->chunkPtr; chunkPtr != NULL ;
chunkPtr = chunkPtr->nextPtr) {
if (byteCount < chunkPtr->numBytes) {
@@ -5399,36 +5409,33 @@ TkTextSeeCmd(
/*
* Call a chunk-specific function to find the horizontal range of the
- * character within the chunk. chunkPtr is NULL if trying to see in elided
- * region.
+ * character within the chunk.
*/
- if (chunkPtr != NULL) {
- (*chunkPtr->bboxProc)(textPtr, chunkPtr, byteCount,
- dlPtr->y + dlPtr->spaceAbove,
- dlPtr->height - dlPtr->spaceAbove - dlPtr->spaceBelow,
- dlPtr->baseline - dlPtr->spaceAbove, &x, &y, &width,
- &height);
- delta = x - dInfoPtr->curXPixelOffset;
- oneThird = lineWidth/3;
- if (delta < 0) {
- if (delta < -oneThird) {
- dInfoPtr->newXPixelOffset = (x - lineWidth/2);
- } else {
- dInfoPtr->newXPixelOffset -= ((-delta) );
- }
- } else {
- delta -= (lineWidth - width);
- if (delta > 0) {
- if (delta > oneThird) {
- dInfoPtr->newXPixelOffset = (x - lineWidth/2);
- } else {
- dInfoPtr->newXPixelOffset += (delta );
- }
- } else {
- return TCL_OK;
- }
- }
+ (*chunkPtr->bboxProc)(textPtr, chunkPtr, byteCount,
+ dlPtr->y + dlPtr->spaceAbove,
+ dlPtr->height - dlPtr->spaceAbove - dlPtr->spaceBelow,
+ dlPtr->baseline - dlPtr->spaceAbove, &x, &y, &width,
+ &height);
+ delta = x - dInfoPtr->curXPixelOffset;
+ oneThird = lineWidth/3;
+ if (delta < 0) {
+ if (delta < -oneThird) {
+ dInfoPtr->newXPixelOffset = (x - lineWidth/2);
+ } else {
+ dInfoPtr->newXPixelOffset -= ((-delta) );
+ }
+ } else {
+ delta -= (lineWidth - width);
+ if (delta > 0) {
+ if (delta > oneThird) {
+ dInfoPtr->newXPixelOffset = (x - lineWidth/2);
+ } else {
+ dInfoPtr->newXPixelOffset += (delta );
+ }
+ } else {
+ return TCL_OK;
+ }
}
dInfoPtr->flags |= DINFO_OUT_OF_DATE;
if (!(dInfoPtr->flags & REDRAW_PENDING)) {
@@ -6812,7 +6819,7 @@ TkTextIndexBbox(
TextDInfo *dInfoPtr = textPtr->dInfoPtr;
DLine *dlPtr;
register TkTextDispChunk *chunkPtr;
- int byteIndex;
+ int byteCount;
/*
* Make sure that all of the screen layout information is up to date.
@@ -6844,20 +6851,20 @@ TkTextIndexBbox(
* Find the chunk within the display line that contains the desired
* index. The chunks making the display line are skipped up to but not
* including the one crossing indexPtr. Skipping is done based on
- * a byteIndex offset possibly spanning several logical lines in case
+ * a byteCount offset possibly spanning several logical lines in case
* they are elided.
*/
- byteIndex = TkTextIndexCount(textPtr, &dlPtr->index, indexPtr,
+ byteCount = TkTextIndexCount(textPtr, &dlPtr->index, indexPtr,
COUNT_INDICES);
for (chunkPtr = dlPtr->chunkPtr; ; chunkPtr = chunkPtr->nextPtr) {
if (chunkPtr == NULL) {
return -1;
}
- if (byteIndex < chunkPtr->numBytes) {
+ if (byteCount < chunkPtr->numBytes) {
break;
}
- byteIndex -= chunkPtr->numBytes;
+ byteCount -= chunkPtr->numBytes;
}
/*
@@ -6867,13 +6874,13 @@ TkTextIndexBbox(
* coordinate on the screen. Translate it to reflect horizontal scrolling.
*/
- (*chunkPtr->bboxProc)(textPtr, chunkPtr, byteIndex,
+ (*chunkPtr->bboxProc)(textPtr, chunkPtr, byteCount,
dlPtr->y + dlPtr->spaceAbove,
dlPtr->height - dlPtr->spaceAbove - dlPtr->spaceBelow,
dlPtr->baseline - dlPtr->spaceAbove, xPtr, yPtr, widthPtr,
heightPtr);
*xPtr = *xPtr + dInfoPtr->x - dInfoPtr->curXPixelOffset;
- if ((byteIndex == chunkPtr->numBytes-1) && (chunkPtr->nextPtr == NULL)) {
+ if ((byteCount == chunkPtr->numBytes-1) && (chunkPtr->nextPtr == NULL)) {
/*
* Last character in display line. Give it all the space up to the
* line.
@@ -6972,6 +6979,15 @@ TkTextDLineInfo(
*/
dlPtr = FindDLine(textPtr, dInfoPtr->dLinePtr, indexPtr);
+
+ /*
+ * Two cases shall be trapped here because the logic later really
+ * needs dlPtr to be the display line containing indexPtr:
+ * 1. if no display line contains the desired index (NULL dlPtr)
+ * 2. if indexPtr is before the first display line, in which case
+ * dlPtr currently points to the first display line
+ */
+
if ((dlPtr == NULL) || (TkTextIndexCmp(&dlPtr->index, indexPtr) > 0)) {
return -1;
}