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00edcc582f
Basically, I replaced all methods in the font_metrics namespace by a proper virtual interface FontMetrics. The FontLoader is _the_ container for FontMetrics. This patch should also bring some optimizations in a number of place in the code. This is because we do not need any more to search for the LyXFont at each font_metrics call. In effect, the speed advantage is not as sensible and this is a bit deceiving considering that this was my primary motivation behind the patch. But I like the patch anyway as it cleans up the relation and interfacing between fonts, metrics and frontends. * frontends/FontMetrics.h: new virtual interface. Renamed from font_metrics.h * qt4/GuiFontMetrics: corresponding qt4 implememtation. Renamed from qfont_metrics.C. The smallCaps particular case treatment has been transfered here as well as the width cache for MacOSX and Windows. * qt4/QLPainter.C: the smallCapsText has been reworked to return the width of the drawn text.C all other files: replace font_metric helper function call with corresponding FontMetrics method calls. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15265 a592a061-630c-0410-9148-cb99ea01b6c8
85 lines
1.6 KiB
C++
85 lines
1.6 KiB
C++
// -*- C++ -*-
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/**
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* \file GuiFontLoader.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 QT4_FONTLOADER_H
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#define QT4_FONTLOADER_H
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#include "frontends/FontLoader.h"
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#include "GuiFontMetrics.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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namespace lyx {
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namespace frontend {
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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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/// The font instance
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QFont font;
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/// Metrics on the font
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boost::scoped_ptr<GuiFontMetrics> metrics;
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};
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/// Hold info about a particular font
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class GuiFontLoader: public FontLoader
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{
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public:
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///
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GuiFontLoader();
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/// Destructor
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virtual ~GuiFontLoader();
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virtual void update();
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virtual bool available(LyXFont const & f);
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inline virtual FontMetrics const & metrics(LyXFont const & f) {
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return *fontinfo(f).metrics.get();
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}
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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 font info (font + metrics) for the given LyX font.
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QLFontInfo & fontinfo(LyXFont const & f) {
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// fi is a reference to the pointer type (QLFontInfo *) in the
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// fontinfo_ table.
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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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} // namespace frontend
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} // namespace lyx
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#endif // QT4_FONTLOADER_H
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