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180e0d9e28
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5332 a592a061-630c-0410-9148-cb99ea01b6c8
144 lines
2.4 KiB
C
144 lines
2.4 KiB
C
/**
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* \file qfont_metrics.C
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* Copyright 1995-2002 the LyX Team
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* Read the file COPYING
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*
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* \author unknown
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* \author John Levon <moz@compsoc.man.ac.uk>
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*/
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#include <config.h>
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#ifdef __GNUG__
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#pragma implementation "frontends/font_metrics.h"
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#endif
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#include "support/lstrings.h"
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#include "font_metrics.h"
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#include "qfont_loader.h"
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#include "debug.h"
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#include <qfontmetrics.h>
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#include <qfont.h>
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namespace {
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QFontMetrics const & metrics(LyXFont const & f) {
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return fontloader.metrics(f);
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}
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}
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namespace font_metrics {
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int maxAscent(LyXFont const & f)
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{
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return metrics(f).ascent();
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}
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int maxDescent(LyXFont const & f)
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{
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return metrics(f).descent();
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}
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int ascent(char c, LyXFont const & f)
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{
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QRect r = metrics(f).boundingRect(c);
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return abs(r.top());
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}
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int descent(char c, LyXFont const & f)
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{
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QRect r = metrics(f).boundingRect(c);
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return abs(r.bottom());
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}
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int lbearing(char c, LyXFont const & f)
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{
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lyxerr << "lb of " << c << " is " << metrics(f).leftBearing(c)
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<< std::endl;
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return metrics(f).leftBearing(c);
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}
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int rbearing(char c, LyXFont const & f)
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{
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QFontMetrics const & m(metrics(f));
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// Qt rbearing is from the right edge of the char's width().
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return (m.width(c) - m.rightBearing(c));
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}
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int width(char const * s, size_t ls, LyXFont const & f)
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{
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if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
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return metrics(f).width(s, ls);
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}
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// handle small caps ourselves ...
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LyXFont smallfont(f);
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smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
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QFontMetrics qm = fontloader.metrics(f);
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QFontMetrics qsmallm = fontloader.metrics(smallfont);
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int w = 0;
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for (size_t i = 0; i < ls; ++i) {
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char const c = uppercase(s[i]);
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if (c != s[i])
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w += qsmallm.width(&c, 1);
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else
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w += qm.width(&c, 1);
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}
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return w;
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}
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int signedWidth(string const & s, LyXFont const & f)
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{
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if (s[0] == '-')
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return -width(s.substr(1, s.length() - 1), f);
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else
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return width(s, f);
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}
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void rectText(string const & str, LyXFont const & f,
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int & w,
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int & ascent,
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int & descent)
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{
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QFontMetrics const & m(metrics(f));
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static int const d = 2;
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w = width(str, f) + d * 2 + 2;
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ascent = m.ascent() + d;
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descent = m.descent() + d;
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}
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void buttonText(string const & str, LyXFont const & f,
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int & w,
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int & ascent,
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int & descent)
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{
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QFontMetrics const & m(metrics(f));
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static int const d = 3;
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w = width(str, f) + d * 2 + 2;
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ascent = m.ascent() + d;
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descent = m.descent() + d;
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}
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} // namespace font_metrics
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