#include "support/docstring.h"
+#include <QByteArray>
+#include <QCache>
+#include <QFont>
#include <QFontMetrics>
#include <QHash>
+#include <QTextLayout>
namespace lyx {
namespace frontend {
virtual int maxAscent() const;
virtual int maxDescent() const;
virtual Dimension const defaultDimension() const;
+ virtual int em() const;
+ virtual int lineWidth() const;
+ virtual int underlinePos() const;
+ virtual int strikeoutPos() const;
virtual int width(char_type c) const;
virtual int ascent(char_type c) const;
virtual int descent(char_type c) const;
virtual int rbearing(char_type c) const;
virtual int width(docstring const & s) const;
virtual int signedWidth(docstring const & s) const;
+ virtual int pos2x(docstring const & s, int pos, bool rtl, double ws) const;
+ virtual int x2pos(docstring const & s, int & x, bool rtl, double ws) const;
+ virtual bool breakAt(docstring & s, int & x, bool rtl, bool force) const;
virtual Dimension const dimension(char_type c) const;
virtual void rectText(docstring const & str,
int width(QString const & str) const;
private:
+
+ QTextLayout const &
+ getTextLayout(docstring const & s, QFont font,
+ bool const rtl, double const wordspacing) const;
+
+ /// The font
+ QFont font_;
+
/// Metrics on the font
QFontMetrics metrics_;
/// Cache of char widths
mutable QHash<char_type, int> width_cache_;
+ /// Cache of string widths
+ mutable QCache<QByteArray, int> strwidth_cache_;
+
struct AscendDescend {
int ascent;
int descent;
/// Cache of char right bearings
mutable QHash<char_type, int> rbearing_cache_;
+
+ // A trivial QTextLayout cache
+ mutable QTextLayout tl_cache_;
+ mutable docstring tl_cache_s_;
+ mutable QFont tl_cache_font_;
+ mutable bool tl_cache_rtl_;
+ mutable double tl_cache_wordspacing_;
+
};
} // namespace frontend