Fix text ellipsis not implemented in Tibetan

The original code checks the existence of an ellipsis character first.If
this does not exist (glyph == 0,which is an invalid glyph index), then
it falls back to looking up '.'. But in the Tibetan environment,the
glyphIndex('.') also returns 0, so that it simply doesn't add any form
of "...", and cuts the text instead.

If both the attempts at getting something from the main font fails,
we can do a third pass on the "multi" font engine.

Fixes: QTBUG-95942
Done-with: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
Change-Id: I251de3fe92e19be0462c58c2059ecf7d354bfbb0
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
(cherry picked from commit 586d9e6013de94e5affd0ea6b079799cce069f2d)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp
index 74967aeac9..c031f4ce96 100644
--- a/src/gui/text/qtextengine.cpp
+++ b/src/gui/text/qtextengine.cpp
@@ -3095,6 +3095,11 @@ QString QTextEngine::elidedText(Qt::TextElideMode mode, const QFixed &width, int
 
                 ellipsisWidth *= 3;
                 ellipsisText = QStringLiteral("...");
+            } else {
+                engine = fnt.d->engineForScript(QChar::Script_Common);
+                glyph = engine->glyphIndex(ellipsisChar.unicode());
+                engine->recalcAdvances(&glyphs, { });
+                ellipsisText = ellipsisChar;
             }
         }
     }