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
18 #include "FontLoader.h"
23 #include <boost/smart_ptr.hpp>
30 XFontStruct * getXFontstruct(LyXFont const & f)
32 return fontloader.load(f.family(), f.series(),
33 f.realShape(), f.size());
38 XID getFontID(LyXFont const & f)
40 return getXFontstruct(f)->fid;
45 int lyxfont::maxAscent(LyXFont const & f)
47 return getXFontstruct(f)->ascent;
51 int lyxfont::maxDescent(LyXFont const & f)
53 return getXFontstruct(f)->descent;
57 int lyxfont::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 lyxfont::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 lyxfont::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 lyxfont::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 lyxfont::width(char const * s, size_t n, LyXFont const & f)
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 = 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
138 unsigned int result = 0;
140 LyXFont smallfont(f);
141 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
142 for (size_t i = 0; i < n; ++i) {
144 // when islower is a macro, the cast is needed (JMarc)
145 if (islower(static_cast<unsigned char>(c))) {
147 result += ::XTextWidth(getXFontstruct(smallfont), &c, 1);
149 result += ::XTextWidth(getXFontstruct(f), &c, 1);
157 int lyxfont::signedWidth(string const & s, LyXFont const & f)
159 if (s.empty()) return 0;
161 return -width(s.substr(1, s.length() - 1), f);
167 //int lyxfont::width(wstring const & s, int n, LyXFont const & f)
168 int lyxfont::width(XChar2b const * s, int n, LyXFont const & f)
173 if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
174 return ::XTextWidth16(getXFontstruct(f), s, n);
176 // emulate smallcaps since X doesn't support this
177 unsigned int result = 0;
179 LyXFont smallfont(f);
180 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
181 for (int i = 0; i < n; ++i) {
182 if (s[i].byte1 == 0 && islower(s[i].byte2)) {
183 c.byte2 = toupper(s[i].byte2);
184 result += ::XTextWidth16(getXFontstruct(smallfont), &c, 1);
186 result += ::XTextWidth16(getXFontstruct(f), &s[i], 1);
193 int lyxfont::XTextWidth(LyXFont const & f, char const * str, int count)
195 return ::XTextWidth(getXFontstruct(f), str, count);
199 int lyxfont::XTextWidth16(LyXFont const & f, XChar2b const * str, int count)
201 return ::XTextWidth16(getXFontstruct(f), str, count);
205 void lyxfont::XSetFont(Display * display, GC gc, LyXFont const & f)
207 ::XSetFont(display, gc, getFontID(f));
211 void lyxfont::rectText(string const & str, LyXFont const & font,
212 int & width, int & ascent, int & descent)
214 static int const d = 2;
215 width = lyxfont::width(str, font) + d * 2 + 2;
216 ascent = lyxfont::maxAscent(font) + d;
217 descent = lyxfont::maxDescent(font) + d;
222 void lyxfont::buttonText(string const & str, LyXFont const & font,
223 int & width, int & ascent, int & descent)
225 static int const d = 3;
227 width = lyxfont::width(str, font) + d * 2 + 2;
228 ascent = lyxfont::maxAscent(font) + d;
229 descent = lyxfont::maxDescent(font) + d;
233 //} // end of namespace font
234 //} // end of namespace lyx