From 37f20ea8e64afa2d29d9fb56ac34ff405367a2b8 Mon Sep 17 00:00:00 2001
From: Jiang Jiang <jiang.jiang@nokia.com>
Date: Fri, 20 May 2011 10:26:54 +0200
Subject: [PATCH] Fix ligature offset in multi-line text

Reviewed-by: Eskil
(cherry picked from commit 278cf1f37945050c4a46d5acab0659f3a7546a43)

Change-Id: Ice20aa38a49ea16cf56bd3705c7d400ee165a9c2
Reviewed-on: http://codereview.qt.nokia.com/195
Reviewed-by: Jiang Jiang <jiang.jiang@nokia.com>
---
 src/gui/text/qtextlayout.cpp               |  4 ++--
 tests/auto/qtextlayout/tst_qtextlayout.cpp | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/gui/text/qtextlayout.cpp b/src/gui/text/qtextlayout.cpp
index 9e067d763f..2e2a6234ae 100644
--- a/src/gui/text/qtextlayout.cpp
+++ b/src/gui/text/qtextlayout.cpp
@@ -2609,8 +2609,8 @@ qreal QTextLine::cursorToX(int *cursorPos, Edge edge) const
     } else {
         bool rtl = eng->isRightToLeft();
         bool visual = eng->visualCursorMovement();
+        int end = qMin(lineEnd, si->position + l) - si->position;
         if (reverse) {
-            int end = qMin(lineEnd, si->position + l) - si->position;
             int glyph_end = end == l ? si->num_glyphs : logClusters[end];
             int glyph_start = glyph_pos;
             if (visual && !rtl && !(lastLine && itm == (visualOrder[nItems - 1] + firstItem)))
@@ -2626,7 +2626,7 @@ qreal QTextLine::cursorToX(int *cursorPos, Edge edge) const
             for (int i = glyph_start; i <= glyph_end; i++)
                 x += glyphs.effectiveAdvance(i);
         }
-        x += eng->offsetInLigature(si, pos, line.length, glyph_pos);
+        x += eng->offsetInLigature(si, pos, end, glyph_pos);
     }
 
     *cursorPos = pos + si->position;
diff --git a/tests/auto/qtextlayout/tst_qtextlayout.cpp b/tests/auto/qtextlayout/tst_qtextlayout.cpp
index b6adc2b8a0..be0a83fe38 100644
--- a/tests/auto/qtextlayout/tst_qtextlayout.cpp
+++ b/tests/auto/qtextlayout/tst_qtextlayout.cpp
@@ -127,6 +127,7 @@ private slots:
     void textWithSurrogates_qtbug15679();
     void textWidthWithStackedTextEngine();
     void textWidthWithLineSeparator();
+    void cursorInLigatureWithMultipleLines();
 
 private:
     QFont testFont;
@@ -1460,5 +1461,21 @@ void tst_QTextLayout::textWidthWithLineSeparator()
     QCOMPARE(line1.naturalTextWidth(), line2.naturalTextWidth());
 }
 
+void tst_QTextLayout::cursorInLigatureWithMultipleLines()
+{
+#if !defined(Q_WS_MAC)
+    QSKIP("This test can not be run on Mac", SkipAll);
+#endif
+    QTextLayout layout("first line finish", QFont("Times", 20));
+    layout.beginLayout();
+    QTextLine line = layout.createLine();
+    line.setLineWidth(70);
+    line = layout.createLine();
+    layout.endLayout();
+
+    // The second line will be "finish", with "fi" as a ligature
+    QVERIFY(line.cursorToX(0) != line.cursorToX(1));
+}
+
 QTEST_MAIN(tst_QTextLayout)
 #include "tst_qtextlayout.moc"