RESOLVED FIXED329840
[line-clamp] Share the text truncation of content and the block ellipsis 
https://bugs.webkit.org/show_bug.cgi?id=329840
Summary [line-clamp] Share the text truncation of content and the block ellipsis
Christian Biesinger
Reported 2026-11-02 10:50:00 PST
text-overflow truncates two things: the line's content, in truncate() / truncateTextContentWithMismatchingDirection(), and a block ellipsis that still overflows the line, in truncateBlockEllipsisForTextOverflow() (added in bug 329149). The block ellipsis has its own copy of the truncation rules, because TextUtil::breakWord only works on an InlineTextBox. The copy covers which end overflows in each direction, the first-character rule and the measuring, and the two copies can drift apart. Alan asked for this follow-up in https://github.com/WebKit/WebKit/pull/78499. Plan: - Make TextUtil::breakWord usable on any string, by measuring through a width function. - Use one truncation routine for both content and the block ellipsis.
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Add attachment proposed patch, testcase, etc.
Christian Biesinger
Comment 1 2026-11-02 10:55:38 PST
Pull request: https://github.com/WebKit/WebKit/pull/79330
EWS
Comment 2 2026-11-03 20:00:48 PST
Committed 325687@main (f91ce22de428): <https://commits.webkit.org/325687@main> Reviewed commits have been landed. Closing PR #79330 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2026-11-03 20:01:18 PST
<rdar://problem/191760915>
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