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-rw-r--r--generic/tkText.c53
1 files changed, 31 insertions, 22 deletions
diff --git a/generic/tkText.c b/generic/tkText.c
index 386dac5..0d06233 100644
--- a/generic/tkText.c
+++ b/generic/tkText.c
@@ -881,7 +881,7 @@ TextWidgetObjCmd(
} else if (c == 'd' && (length > 8)
&& !strncmp("-displaylines", option, (unsigned) length)) {
TkTextLine *fromPtr, *lastPtr;
- TkTextIndex index;
+ TkTextIndex index, index2;
int compare = TkTextIndexCmp(indexFromPtr, indexToPtr);
value = 0;
@@ -916,35 +916,44 @@ TextWidgetObjCmd(
/*
* We're going to count up all display lines in the logical
* line of 'indexFromPtr' up to, but not including the logical
- * line of 'indexToPtr', and then subtract off what we didn't
- * want from 'from' and add on what we didn't count from 'to.
+ * line of 'indexToPtr' (except if this line is elided), and
+ * then subtract off what came in too much from elided lines,
+ * also subtract off what we didn't want from 'from' and add
+ * on what we didn't count from 'to'.
*/
- while (index.linePtr != indexToPtr->linePtr) {
- value += TkTextUpdateOneLine(textPtr, fromPtr,0,&index,0);
-
- /*
- * We might have skipped past indexToPtr, if we have
- * multiple logical lines in a single display line.
- */
- if (TkTextIndexCmp(&index,indexToPtr) > 0) {
- break;
- }
+ while (TkTextIndexCmp(&index,indexToPtr) < 0) {
+ value += TkTextUpdateOneLine(textPtr, index.linePtr,
+ 0, &index, 0);
}
- /*
- * Now we need to adjust the count to add on the number of
- * display lines in the last logical line, and subtract off
- * the number of display lines overcounted in the first
- * logical line. This logic is still ok if both indices are in
- * the same logical line.
- */
+ index2 = index;
+
+ /*
+ * Now we need to adjust the count to:
+ * - subtract off the number of display lines between
+ * indexToPtr and index2, since we might have skipped past
+ * indexToPtr, if we have several logical lines in a
+ * single display line
+ * - subtract off the number of display lines overcounted
+ * in the first logical line
+ * - add on the number of display lines in the last logical
+ * line
+ * This logic is still ok if both indexFromPtr and indexToPtr
+ * are in the same logical line.
+ */
+ index = *indexToPtr;
+ index.byteIndex = 0;
+ while (TkTextIndexCmp(&index,&index2) < 0) {
+ value -= TkTextUpdateOneLine(textPtr, index.linePtr,
+ 0, &index, 0);
+ }
index.linePtr = indexFromPtr->linePtr;
index.byteIndex = 0;
while (1) {
TkTextFindDisplayLineEnd(textPtr, &index, 1, NULL);
- if (index.byteIndex >= indexFromPtr->byteIndex) {
+ if (TkTextIndexCmp(&index,indexFromPtr) >= 0) {
break;
}
TkTextIndexForwBytes(textPtr, &index, 1, &index);
@@ -956,7 +965,7 @@ TextWidgetObjCmd(
index.byteIndex = 0;
while (1) {
TkTextFindDisplayLineEnd(textPtr, &index, 1, NULL);
- if (index.byteIndex >= indexToPtr->byteIndex) {
+ if (TkTextIndexCmp(&index,indexToPtr) >= 0) {
break;
}
TkTextIndexForwBytes(textPtr, &index, 1, &index);