Allow arbitrary baseline shift in QTextCharacterFormat

Added 6 new methods in QTextFormat and QTextDocument to
allow setting/getting specific % positioning for baseline and super/
subscript. Modified QTextLayout to honor those new settings.

[ChangeLog][QtGui][QTextLayout,QTextFormat,QTextDocument] Allow text
layout modification based on baseline offset and super/subscript % height
positioning

Fixes: QTBUG-18260
Change-Id: I0796f18224aac8df6baf8359c35022fd98fe64ef
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gui/text/qtextformat_p.h b/src/gui/text/qtextformat_p.h
index 862ef18e65..13815d06b3 100644
--- a/src/gui/text/qtextformat_p.h
+++ b/src/gui/text/qtextformat_p.h
@@ -101,8 +101,15 @@ public:
     inline QFont defaultFont() const { return defaultFnt; }
     void setDefaultFont(const QFont &f);
 
+    inline void setSuperScriptBaseline(qreal baseline) { defaultFormat.setSuperScriptBaseline(baseline); }
+    inline void setSubScriptBaseline(qreal baseline) { defaultFormat.setSubScriptBaseline(baseline); }
+    inline void setBaselineOffset(qreal baseline) { defaultFormat.setBaselineOffset(baseline); }
+
+    inline QTextCharFormat defaultTextFormat() const { return defaultFormat; }
+
 private:
     QFont defaultFnt;
+    QTextCharFormat defaultFormat;
 
     Q_DISABLE_COPY_MOVE(QTextFormatCollection)
 };