3 * \file GuiFontMetrics.h
4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
7 * \author Abdelrazak Younes
9 * Full author contact details are available in file CREDITS.
12 #ifndef GUI_FONT_METRICS_H
13 #define GUI_FONT_METRICS_H
15 #include "frontends/FontMetrics.h"
17 #include "support/docstring.h"
19 #include <QFontMetrics>
25 class GuiFontMetrics : public FontMetrics
28 GuiFontMetrics(QFont const & font);
30 virtual ~GuiFontMetrics() {}
32 virtual int maxAscent() const;
33 virtual int maxDescent() const;
34 virtual Dimension const defaultDimension() const;
35 virtual int width(char_type c) const;
36 virtual int ascent(char_type c) const;
37 virtual int descent(char_type c) const;
38 virtual int lbearing(char_type c) const;
39 virtual int rbearing(char_type c) const;
40 virtual int width(docstring const & s) const;
41 virtual int signedWidth(docstring const & s) const;
42 virtual Dimension const dimension(char_type c) const;
44 virtual void rectText(docstring const & str,
48 virtual void buttonText(docstring const & str,
53 int width(QString const & str) const;
56 /// Metrics on the font
57 QFontMetrics metrics_;
59 /// Cache of char widths
60 mutable QHash<char_type, int> width_cache_;
62 struct AscendDescend {
66 /// Cache of char ascends and descends
67 mutable QHash<char_type, AscendDescend> metrics_cache_;
68 /// fill in \c metrics_cache_ at specified value.
69 AscendDescend const fillMetricsCache(char_type) const;
71 /// Cache of char right bearings
72 mutable QHash<char_type, int> rbearing_cache_;
75 } // namespace frontend
78 #endif // GUI_FONT_METRICS_H