mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-16 07:55:41 +00:00
b30f8d3c4b
1) Distinguish expanding characters from separators, to fit with Qt's notion of
expanding character which comes from the Unicode std. CountExpanders() is moved
to FontMetrics to fix a discrepancy with the duplicate implementation from
598f7e4a.
2) Make these expanders stretch on-screen proportionally to the em of the font.
If a row mixes large and small text, LyX let us see which spaces are set in the
bigger font.
3) Now that the stretch is defined in ems, add a limit such that an expander
never stretches more than 1.5em to avoid weird and hard to read justified lines.
4) Add a return boolean to setSeparatorExtraWidth for future use.
111 lines
2.7 KiB
C++
111 lines
2.7 KiB
C++
// -*- C++ -*-
|
|
/**
|
|
* \file GuiFontMetrics.h
|
|
* This file is part of LyX, the document processor.
|
|
* Licence details can be found in the file COPYING.
|
|
*
|
|
* \author Abdelrazak Younes
|
|
*
|
|
* Full author contact details are available in file CREDITS.
|
|
*/
|
|
|
|
#ifndef GUI_FONT_METRICS_H
|
|
#define GUI_FONT_METRICS_H
|
|
|
|
#include "frontends/FontMetrics.h"
|
|
|
|
#include "support/docstring.h"
|
|
|
|
#include <QByteArray>
|
|
#include <QCache>
|
|
#include <QFont>
|
|
#include <QFontMetrics>
|
|
#include <QHash>
|
|
#include <QTextLayout>
|
|
|
|
namespace lyx {
|
|
namespace frontend {
|
|
|
|
class GuiFontMetrics : public FontMetrics
|
|
{
|
|
public:
|
|
GuiFontMetrics(QFont const & font);
|
|
|
|
virtual ~GuiFontMetrics() {}
|
|
|
|
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 lbearing(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,
|
|
int & ascent,
|
|
int & descent) const;
|
|
virtual void buttonText(docstring const & str,
|
|
int & width,
|
|
int & ascent,
|
|
int & descent) const;
|
|
|
|
int countExpanders(docstring const & str) const;
|
|
///
|
|
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 ascends and descends
|
|
mutable QHash<char_type, AscendDescend> metrics_cache_;
|
|
/// fill in \c metrics_cache_ at specified value.
|
|
AscendDescend const fillMetricsCache(char_type) const;
|
|
|
|
/// 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
|
|
} // namespace lyx
|
|
|
|
#endif // GUI_FONT_METRICS_H
|