1 /* This file is part of
2 * ======================================================
4 * LyX, The Document Processor
6 * Copyright 1995 Matthias Ettrich
7 * Copyright 1995-2001 The LyX Team.
9 * ====================================================== */
14 #pragma implementation
17 #include "support/lstrings.h"
18 #include "xfont_metrics.h"
19 #include "xfont_loader.h"
24 #include <boost/scoped_array.hpp>
29 XFontStruct * getXFontstruct(LyXFont const & f)
31 return fontloader.load(f.family(), f.series(),
32 f.realShape(), f.size());
37 XID getFontID(LyXFont const & f)
39 return getXFontstruct(f)->fid;
44 int font_metrics::maxAscent(LyXFont const & f)
46 return getXFontstruct(f)->ascent;
50 int font_metrics::maxDescent(LyXFont const & f)
52 return getXFontstruct(f)->descent;
56 int font_metrics::ascent(char c, LyXFont const & f)
58 XFontStruct * finfo = getXFontstruct(f);
59 unsigned int uc = static_cast<unsigned char>(c);
61 && uc >= finfo->min_char_or_byte2
62 && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
63 return finfo->per_char[uc - finfo->min_char_or_byte2].ascent;
69 int font_metrics::descent(char c, LyXFont const & f)
71 XFontStruct * finfo = getXFontstruct(f);
72 unsigned int uc = static_cast<unsigned char>(c);
74 && uc >= finfo->min_char_or_byte2
75 && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
76 return finfo->per_char[uc - finfo->min_char_or_byte2].descent;
78 return finfo->descent;
82 int font_metrics::lbearing(char c, LyXFont const & f)
84 XFontStruct * finfo = getXFontstruct(f);
85 unsigned int uc = static_cast<unsigned char>(c);
87 && uc >= finfo->min_char_or_byte2
88 && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
89 return finfo->per_char[uc - finfo->min_char_or_byte2].lbearing;
95 int font_metrics::rbearing(char c, LyXFont const & f)
97 XFontStruct * finfo = getXFontstruct(f);
98 unsigned int uc = static_cast<unsigned char>(c);
100 && uc >= finfo->min_char_or_byte2
101 && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
102 return finfo->per_char[uc - finfo->min_char_or_byte2].rbearing;
108 int font_metrics::width(char c, LyXFont const & f)
110 return width(&c, 1, f);
114 int font_metrics::width(string const & s, LyXFont const & f)
116 if (s.empty()) return 0;
117 return width(s.data(), s.length(), f);
121 int font_metrics::width(char const * s, size_t n, LyXFont const & f)
126 if (lyxrc.font_norm_type == LyXRC::ISO_10646_1) {
127 boost::scoped_array<XChar2b> xs(new XChar2b[n]);
128 Encoding const * encoding = f.language()->encoding();
130 if (f.isSymbolFont()) {
131 #ifdef USE_UNICODE_FOR_SYMBOLS
132 font.setFamily(LyXFont::ROMAN_FAMILY);
133 font.setShape(LyXFont::UP_SHAPE);
135 encoding = encodings.symbol_encoding();
137 for (size_t i = 0; i < n; ++i) {
138 Uchar c = encoding->ucs(s[i]);
139 xs[i].byte1 = c >> 8;
140 xs[i].byte2 = c & 0xff;
142 int result = width(xs.get(), n, font);
146 if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
147 return ::XTextWidth(getXFontstruct(f), s, n);
149 // emulate smallcaps since X doesn't support this
150 unsigned int result = 0;
151 LyXFont smallfont(f);
152 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
153 for (size_t i = 0; i < n; ++i) {
154 char const c = uppercase(s[i]);
156 result += ::XTextWidth(getXFontstruct(smallfont), &c, 1);
158 result += ::XTextWidth(getXFontstruct(f), &c, 1);
166 int font_metrics::signedWidth(string const & s, LyXFont const & f)
171 return -width(s.substr(1, s.length() - 1), f);
177 //int font_metrics::width(wstring const & s, int n, LyXFont const & f)
178 int font_metrics::width(XChar2b const * s, int n, LyXFont const & f)
183 if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
184 return ::XTextWidth16(getXFontstruct(f), s, n);
186 // emulate smallcaps since X doesn't support this
187 unsigned int result = 0;
189 LyXFont smallfont(f);
190 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
191 for (int i = 0; i < n; ++i) {
195 c.byte1 = s[i].byte1;
196 c.byte2 = uppercase(s[i].byte2);
198 if (c.byte2 != s[i].byte2) {
199 result += ::XTextWidth16(getXFontstruct(smallfont), &c, 1);
201 result += ::XTextWidth16(getXFontstruct(f), &s[i], 1);
208 int font_metrics::XTextWidth(LyXFont const & f, char const * str, int count)
210 return ::XTextWidth(getXFontstruct(f), str, count);
214 int font_metrics::XTextWidth16(LyXFont const & f, XChar2b const * str, int count)
216 return ::XTextWidth16(getXFontstruct(f), str, count);
220 void font_metrics::XSetFont(Display * display, GC gc, LyXFont const & f)
222 ::XSetFont(display, gc, getFontID(f));
226 void font_metrics::rectText(string const & str, LyXFont const & font,
227 int & width, int & ascent, int & descent)
229 static int const d = 2;
230 width = font_metrics::width(str, font) + d * 2 + 2;
231 ascent = font_metrics::maxAscent(font) + d;
232 descent = font_metrics::maxDescent(font) + d;
237 void font_metrics::buttonText(string const & str, LyXFont const & font,
238 int & width, int & ascent, int & descent)
240 static int const d = 3;
242 width = font_metrics::width(str, font) + d * 2 + 2;
243 ascent = font_metrics::maxAscent(font) + d;
244 descent = font_metrics::maxDescent(font) + d;
248 //} // end of namespace font
249 //} // end of namespace lyx