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cf6128caf6
The width of the line is now dependent on the font size. This new computation is applied to: underline, strikeout, double underline.
96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
// -*- C++ -*-
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/**
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* \file GuiFontMetrics.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Abdelrazak Younes
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef GUI_FONT_METRICS_H
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#define GUI_FONT_METRICS_H
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#include "frontends/FontMetrics.h"
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#include "support/docstring.h"
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#include <map>
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#include <QFont>
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#include <QFontMetrics>
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#include <QHash>
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namespace lyx {
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namespace frontend {
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class GuiFontMetrics : public FontMetrics
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{
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public:
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GuiFontMetrics(QFont const & font);
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virtual ~GuiFontMetrics() {}
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virtual int maxAscent() const;
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virtual int maxDescent() const;
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virtual Dimension const defaultDimension() const;
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virtual int em() const;
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virtual int lineWidth() const;
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virtual int underlinePos() const;
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virtual int strikeoutPos() const;
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virtual int width(char_type c) const;
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virtual int ascent(char_type c) const;
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virtual int descent(char_type c) const;
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virtual int lbearing(char_type c) const;
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virtual int rbearing(char_type c) const;
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virtual int width(docstring const & s) const;
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virtual int signedWidth(docstring const & s) const;
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virtual int pos2x(docstring const & s, int pos, bool rtl, double ws) const;
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virtual int x2pos(docstring const & s, int & x, bool rtl, double ws) const;
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virtual bool breakAt(docstring & s, int & x, bool rtl, bool force) const;
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virtual Dimension const dimension(char_type c) const;
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virtual void rectText(docstring const & str,
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int & width,
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int & ascent,
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int & descent) const;
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virtual void buttonText(docstring const & str,
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int & width,
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int & ascent,
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int & descent) const;
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///
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int width(QString const & str) const;
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private:
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/// The font
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QFont font_;
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/// Metrics on the font
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QFontMetrics metrics_;
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/// Cache of char widths
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mutable QHash<char_type, int> width_cache_;
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/// Cache of string widths
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/// FIXME Try to use a QHash (this requires to define qHash(docstring))
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mutable std::map<docstring, int> strwidth_cache_;
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struct AscendDescend {
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int ascent;
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int descent;
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};
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/// Cache of char ascends and descends
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mutable QHash<char_type, AscendDescend> metrics_cache_;
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/// fill in \c metrics_cache_ at specified value.
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AscendDescend const fillMetricsCache(char_type) const;
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/// Cache of char right bearings
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mutable QHash<char_type, int> rbearing_cache_;
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};
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} // namespace frontend
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} // namespace lyx
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#endif // GUI_FONT_METRICS_H
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