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https://git.lyx.org/repos/lyx.git
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98 lines
2.0 KiB
C
98 lines
2.0 KiB
C
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// -*- C++ -*-
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/**
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* \file qfont_loader.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 John Levon
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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 QFONTLOADER_H
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#define QFONTLOADER_H
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#include "encoding.h"
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#include "lyxfont.h"
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#include <QFont>
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#include <QFontMetrics>
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#if QT_VERSION < 0x030100
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#define USE_LYX_FONTCACHE
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#endif
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#if defined(USE_LYX_FONTCACHE)
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#include <map>
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#endif
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/**
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* Qt font loader for LyX. Matches LyXFonts against
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* actual QFont instances, and also caches metrics.
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*/
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class QLFontInfo {
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public:
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QLFontInfo(LyXFont const & f);
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/// Return pixel width for the given unicode char
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int width(Uchar val) const;
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/// The font instance
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QFont font;
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/// Metrics on the font
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QFontMetrics metrics;
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#if defined(USE_LYX_FONTCACHE)
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typedef std::map<Uchar, int> WidthCache;
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/// Cache of char widths
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WidthCache widthcache;
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#endif
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};
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/// Hold info about a particular font
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class FontLoader {
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public:
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///
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FontLoader();
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/// Update fonts after zoom, dpi, font names, or norm change
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void update();
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/// Do we have anything matching?
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bool available(LyXFont const & f);
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/// Get the QFont for this LyXFont
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QFont const & get(LyXFont const & f) {
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return fontinfo(f).font;
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}
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/// Get the QFont metrics for this LyXFont
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QFontMetrics const & metrics(LyXFont const & f) {
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return fontinfo(f).metrics;
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}
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/// Called before QApplication is initialized
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static void initFontPath();
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/// Called the first time when available() can't load a symbol font
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static void addToFontPath();
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/// Get font info (font + metrics) for the given LyX font.
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QLFontInfo & fontinfo(LyXFont const & f) {
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QLFontInfo * & fi =
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fontinfo_[f.family()][f.series()][f.realShape()][f.size()];
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if (!fi)
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fi = new QLFontInfo(f);
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return *fi;
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}
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private:
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/// BUTT ugly !
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QLFontInfo * fontinfo_[LyXFont::NUM_FAMILIES][2][4][10];
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};
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extern FontLoader fontloader;
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#endif // QFONT_LOADER_H
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