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-rw-r--r--macosx/tkMacOSXFont.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/macosx/tkMacOSXFont.c b/macosx/tkMacOSXFont.c
index e4e4e03..d800ae5 100644
--- a/macosx/tkMacOSXFont.c
+++ b/macosx/tkMacOSXFont.c
@@ -883,7 +883,8 @@ TkpMeasureCharsInContext(
/* The call to CTTypesetterSuggestClusterBreak above will always
return at least one character regardless of whether it exceeded
it or not. Clean that up now. */
- while (width > maxWidth && !(flags & TK_PARTIAL_OK) && index > start) {
+ while (width > maxWidth && !(flags & TK_PARTIAL_OK)
+ && index > start+(flags & TK_AT_LEAST_ONE)) {
range.length = --index;
line = CTTypesetterCreateLine(typesetter, range);
width = CTLineGetTypographicBounds(line, NULL, NULL, NULL);