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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5802 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
John Levon 2002-12-11 00:22:37 +00:00
parent a5c4d7cd4e
commit 7db64cdbb2
4 changed files with 90 additions and 36 deletions
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7
src/frontends/qt2/ChangeLog
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@ -1,3 +1,10 @@
2002-12-11 John Levon <levon@movementarian.org>
* qfont_loader.h:
* qfont_loader.C:
* qfont_metrics.C: cache per-char widths to avoid slowness
of QFontMetrics::width
2002-12-10 John Levon <levon@movementarian.org>
* ui/QURLDialog.ui: fix tab order

31
src/frontends/qt2/qfont_loader.C
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@ -23,6 +23,7 @@
#include "qt_helpers.h"
#include <qglobal.h>
#include <qfontmetrics.h>
#if QT_VERSION < 300
#include "support/lstrings.h"
#endif
@ -225,22 +226,36 @@ qfont_loader::font_info::font_info(LyXFont const & f)
}
qfont_loader::font_info const * qfont_loader::getfontinfo(LyXFont const & f)
qfont_loader::font_info * qfont_loader::getfontinfo(LyXFont const & f)
{
if (!lyxrc.use_gui) {
// FIXME
}
font_info const * fi = fontinfo_[f.family()][f.series()][f.realShape()][f.size()];
if (!fi) {
fi = new font_info(f);
fontinfo_[f.family()][f.series()][f.realShape()][f.size()] = fi;
}
return fi;
font_info * fi = fontinfo_[f.family()][f.series()][f.realShape()][f.size()];
if (fi)
return fi;
font_info * fi2 = new font_info(f);
fontinfo_[f.family()][f.series()][f.realShape()][f.size()] = fi2;
return fi2;
}
int qfont_loader::charwidth(LyXFont const & f, Uchar val)
{
font_info * fi = getfontinfo(f);
font_info::WidthCache::const_iterator cit = fi->widthcache.find(val);
if (cit != fi->widthcache.end())
return cit->second;
int const w = fi->metrics.width(QChar(val));
fi->widthcache[val] = w;
return w;
}
bool qfont_loader::available(LyXFont const & f)
{
if (!lyxrc.use_gui)

17
src/frontends/qt2/qfont_loader.h
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@ -16,11 +16,14 @@
#pragma interface
#endif
#include <map>
#include "encoding.h"
#include "lyxfont.h"
#include <qfont.h>
#include <qfontmetrics.h>
/**
* Qt font loader for LyX. Matches LyXFonts against
* actual QFont instances, and also caches metrics.
@ -44,6 +47,10 @@ public:
QFontMetrics const & metrics(LyXFont const & f) {
return getfontinfo(f)->metrics;
}
/// return pixel width for the given unicode char
int charwidth(LyXFont const & f, Uchar val);
private:
/// hold info about a particular font
struct font_info {
@ -53,13 +60,17 @@ private:
QFont font;
/// metrics on the font
QFontMetrics metrics;
typedef std::map<Uchar, int> WidthCache;
/// cache of char widths
WidthCache widthcache;
};
/// get font info (font + metrics) for the given LyX font. Does not fail.
font_info const * getfontinfo(LyXFont const & f);
font_info * getfontinfo(LyXFont const & f);
/// BUTT ugly !
font_info const * fontinfo_[LyXFont::NUM_FAMILIES][2][4][10];
font_info * fontinfo_[LyXFont::NUM_FAMILIES][2][4][10];
};
extern qfont_loader fontloader;

71
src/frontends/qt2/qfont_metrics.C
View File

@ -24,8 +24,7 @@
#include <qfontmetrics.h>
#include <qfont.h>
namespace {
QFontMetrics const & metrics(LyXFont const & f)
@ -33,6 +32,12 @@ QFontMetrics const & metrics(LyXFont const & f)
return fontloader.metrics(f);
}
int charwidth(Uchar val, LyXFont const & f)
{
return fontloader.charwidth(f, val);
}
} // namespace anon
@ -46,22 +51,22 @@ int maxAscent(LyXFont const & f)
int maxDescent(LyXFont const & f)
{
return metrics(f).descent()+1;
// We add 1 as the value returned by QT is different than X
// See http://doc.trolltech.com/2.3/qfontmetrics.html#200b74
return metrics(f).descent() + 1;
}
int ascent(char c, LyXFont const & f)
{
QRect r = metrics(f).boundingRect(c);
QRect const & r = metrics(f).boundingRect(c);
return -r.top();
}
int descent(char c, LyXFont const & f)
{
QRect r = metrics(f).boundingRect(c);
QRect const & r = metrics(f).boundingRect(c);
return r.bottom()+1;
}
@ -81,45 +86,61 @@ int rbearing(char c, LyXFont const & f)
}
int width(char const * s, size_t ls, LyXFont const & f)
Encoding const * fontencoding(LyXFont const & f)
{
Encoding const * encoding = f.language()->encoding();
if (f.isSymbolFont())
encoding = encodings.symbol_encoding();
return encoding;
}
QString str;
#if QT_VERSION >= 300
str.setLength(ls);
for (size_t i = 0; i < ls; ++i)
str[i] = QChar(encoding->ucs(s[i]));
#else
for (size_t i = 0; i < ls; ++i)
str += QChar(encoding->ucs(s[i]));
#endif
if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
return metrics(f).width(str);
}
int smallcapswidth(char const * s, size_t ls, LyXFont const & f)
{
// handle small caps ourselves ...
LyXFont smallfont(f);
smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
QFontMetrics qm = fontloader.metrics(f);
QFontMetrics qsmallm = fontloader.metrics(smallfont);
QFontMetrics const & qm = fontloader.metrics(f);
QFontMetrics const & qsmallm = fontloader.metrics(smallfont);
Encoding const * encoding(fontencoding(f));
int w = 0;
for (size_t i = 0; i < ls; ++i) {
QChar const c = str[i].upper();
if (c != str[i])
w += qsmallm.width(c);
QChar const c = QChar(encoding->ucs(s[i]));
QChar const uc = c.upper();
if (c != uc)
w += qsmallm.width(uc);
else
w += qm.width(c);
}
return w;
}
int width(char const * s, size_t ls, LyXFont const & f)
{
if (f.realShape() == LyXFont::SMALLCAPS_SHAPE) {
return smallcapswidth(s, ls, f);
}
Encoding const * encoding(fontencoding(f));
if (ls == 1) {
return charwidth(encoding->ucs(s[0]), f);
}
int w = 0;
for (size_t i = 0; i < ls; ++i) {
w += charwidth(encoding->ucs(s[i]), f);
}
return w;
}
int signedWidth(string const & s, LyXFont const & f)