2 * \file xfont_metrics.C
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
9 * Full author contact details are available in file CREDITS
14 #include "support/lstrings.h"
15 #include "xfont_metrics.h"
16 #include "xfont_loader.h"
21 #include <boost/scoped_array.hpp>
26 XFontStruct * getXFontstruct(LyXFont const & f)
28 return fontloader.load
29 (f.family(), f.series(),
30 f.realShape(), f.size());
35 XID getFontID(LyXFont const & f)
37 return getXFontstruct(f)->fid;
43 namespace font_metrics {
45 int maxAscent(LyXFont const & f)
47 return getXFontstruct(f)->ascent;
51 int maxDescent(LyXFont const & f)
53 return getXFontstruct(f)->descent;
57 int ascent(char c, LyXFont const & f)
59 XFontStruct * finfo = getXFontstruct(f);
60 unsigned int uc = static_cast<unsigned char>(c);
62 && uc >= finfo->min_char_or_byte2
63 && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
64 return finfo->per_char[uc - finfo->min_char_or_byte2].ascent;
70 int descent(char c, LyXFont const & f)
72 XFontStruct * finfo = getXFontstruct(f);
73 unsigned int uc = static_cast<unsigned char>(c);
75 && uc >= finfo->min_char_or_byte2
76 && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
77 return finfo->per_char[uc - finfo->min_char_or_byte2].descent;
79 return finfo->descent;
83 int lbearing(char c, LyXFont const & f)
85 XFontStruct * finfo = getXFontstruct(f);
86 unsigned int uc = static_cast<unsigned char>(c);
88 && uc >= finfo->min_char_or_byte2
89 && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
90 return finfo->per_char[uc - finfo->min_char_or_byte2].lbearing;
96 int rbearing(char c, LyXFont const & f)
98 XFontStruct * finfo = getXFontstruct(f);
99 unsigned int uc = static_cast<unsigned char>(c);
101 && uc >= finfo->min_char_or_byte2
102 && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
103 return finfo->per_char[uc - finfo->min_char_or_byte2].rbearing;
109 int width(char const * s, size_t n, LyXFont const & f)
111 if (!lyx_gui::use_gui)
114 if (lyxrc.font_norm_type == LyXRC::ISO_10646_1) {
115 boost::scoped_array<XChar2b> xs(new XChar2b[n]);
116 Encoding const * encoding = f.language()->encoding();
118 if (f.isSymbolFont()) {
119 #ifdef USE_UNICODE_FOR_SYMBOLS
120 font.setFamily(LyXFont::ROMAN_FAMILY);
121 font.setShape(LyXFont::UP_SHAPE);
123 encoding = encodings.symbol_encoding();
125 for (size_t i = 0; i < n; ++i) {
126 Uchar c = encoding->ucs(s[i]);
127 xs[i].byte1 = c >> 8;
128 xs[i].byte2 = c & 0xff;
130 int result = xfont_metrics::width(xs.get(), n, font);
134 if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
135 return ::XTextWidth(getXFontstruct(f), s, n);
137 // emulate smallcaps since X doesn't support this
139 LyXFont smallfont(f);
140 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
141 for (size_t i = 0; i < n; ++i) {
142 char const c = uppercase(s[i]);
144 result += ::XTextWidth(getXFontstruct(smallfont), &c, 1);
146 result += ::XTextWidth(getXFontstruct(f), &c, 1);
154 int signedWidth(string const & s, LyXFont const & f)
159 return -width(s.substr(1, s.length() - 1), f);
165 void rectText(string const & str, LyXFont const & font,
170 static int const d = 2;
171 width = font_metrics::width(str, font) + d * 2 + 2;
172 ascent = font_metrics::maxAscent(font) + d;
173 descent = font_metrics::maxDescent(font) + d;
178 void buttonText(string const & str, LyXFont const & font,
183 static int const d = 3;
185 width = font_metrics::width(str, font) + d * 2 + 2;
186 ascent = font_metrics::maxAscent(font) + d;
187 descent = font_metrics::maxDescent(font) + d;
190 } // namespace font_metrics
192 namespace xfont_metrics {
194 int width(XChar2b const * s, int n, LyXFont const & f)
196 if (!lyx_gui::use_gui)
199 if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
200 return ::XTextWidth16(getXFontstruct(f), s, n);
202 // emulate smallcaps since X doesn't support this
205 LyXFont smallfont(f);
206 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
207 for (int i = 0; i < n; ++i) {
211 c.byte1 = s[i].byte1;
212 c.byte2 = uppercase(s[i].byte2);
214 if (c.byte2 != s[i].byte2) {
215 result += ::XTextWidth16(getXFontstruct(smallfont), &c, 1);
217 result += ::XTextWidth16(getXFontstruct(f), &s[i], 1);
225 int XTextWidth(LyXFont const & f, char const * str, int count)
227 return ::XTextWidth(getXFontstruct(f), str, count);
231 int XTextWidth16(LyXFont const & f, XChar2b const * str, int count)
233 return ::XTextWidth16(getXFontstruct(f), str, count);
237 /// hmm, not a metric !
238 void XSetFont(Display * display, GC gc, LyXFont const & f)
240 ::XSetFont(display, gc, getFontID(f));
243 } // namespace xfont_metrics