2 * \file qfont_metrics.C
3 * Copyright 1995-2002 the LyX Team
4 * Read the file COPYING
7 * \author John Levon <moz@compsoc.man.ac.uk>
14 #pragma implementation "frontends/font_metrics.h"
17 #include "support/lstrings.h"
18 #include "font_metrics.h"
19 #include "qfont_loader.h"
22 #include <qfontmetrics.h>
26 QFontMetrics const & metrics(LyXFont const & f) {
27 return fontloader.metrics(f);
32 namespace font_metrics {
34 int maxAscent(LyXFont const & f)
36 return metrics(f).ascent();
40 int maxDescent(LyXFont const & f)
42 return metrics(f).descent();
46 int ascent(char c, LyXFont const & f)
48 QRect r = metrics(f).boundingRect(c);
53 int descent(char c, LyXFont const & f)
55 QRect r = metrics(f).boundingRect(c);
56 return abs(r.bottom());
60 int lbearing(char c, LyXFont const & f)
62 return metrics(f).leftBearing(c);
66 int rbearing(char c, LyXFont const & f)
68 return metrics(f).rightBearing(c);
72 int width(char const * s, size_t ls, LyXFont const & f)
74 if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
75 return metrics(f).width(s, ls);
78 // handle small caps ourselves ...
81 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
83 QFontMetrics qm = fontloader.metrics(f);
84 QFontMetrics qsmallm = fontloader.metrics(smallfont);
88 for (size_t i = 0; i < ls; ++i) {
89 char const c = uppercase(s[i]);
91 w += qsmallm.width(&c, 1);
99 int signedWidth(string const & s, LyXFont const & f)
102 return -width(s.substr(1, s.length() - 1), f);
108 void rectText(string const & str, LyXFont const & f,
113 QFontMetrics const & m(metrics(f));
115 static int const d = 2;
117 w = width(str, f) + d * 2 + 2;
118 ascent = m.ascent() + d;
119 descent = m.descent() + d;
124 void buttonText(string const & str, LyXFont const & f,
129 QFontMetrics const & m(metrics(f));
131 static int const d = 3;
133 w = width(str, f) + d * 2 + 2;
134 ascent = m.ascent() + d;
135 descent = m.descent() + d;
138 } // namespace font_metrics