src/frontends/qt4/GuiFontLoader.C

   1 /**
   2  * \file GuiFontLoader.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author John Levon
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "GuiFontLoader.h"
  15 #include "qt_helpers.h"
  16
  17 #include "debug.h"
  18 #include "lyxrc.h"
  19
  20 #include "support/convert.h"
  21 #include "support/filetools.h"
  22 #include "support/lstrings.h"
  23 #include "support/systemcall.h"
  24
  25 #include <qfontinfo.h>
  26
  27 #include <boost/tuple/tuple.hpp>
  28
  29 #ifdef Q_WS_X11
  30 #include <qwidget.h>
  31 //#include <X11/Xlib.h>
  32 #include <algorithm>
  33 #endif
  34
  35 using lyx::support::contains;
  36
  37 using std::endl;
  38 using std::make_pair;
  39
  40 using std::pair;
  41 using std::vector;
  42 using std::string;
  43
  44
  45 namespace lyx {
  46 namespace frontend {
  47
  48 namespace {
  49
  50 struct symbol_font {
  51         LyXFont::FONT_FAMILY lyx_family;
  52         string family;
  53         string xlfd;
  54 };
  55
  56 symbol_font symbol_fonts[] = {
  57         { LyXFont::SYMBOL_FAMILY,
  58                 "symbol",
  59                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  60
  61         { LyXFont::CMR_FAMILY,
  62                 "cmr10",
  63                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  64
  65         { LyXFont::CMSY_FAMILY,
  66                 "cmsy10",
  67                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  68
  69         { LyXFont::CMM_FAMILY,
  70                 "cmmi10",
  71                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  72
  73         { LyXFont::CMEX_FAMILY,
  74                 "cmex10",
  75                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  76
  77         { LyXFont::MSA_FAMILY,
  78                 "msam10",
  79                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
  80
  81         { LyXFont::MSB_FAMILY,
  82                 "msbm10",
  83                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
  84
  85         { LyXFont::EUFRAK_FAMILY,
  86                 "eufm10",
  87                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  88
  89         { LyXFont::WASY_FAMILY,
  90                 "wasy10",
  91                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  92
  93         { LyXFont::ESINT_FAMILY,
  94                 "esint10",
  95                 "-*-esint10-medium-*-*-*-*-*-*-*-*-*-*-*" }
  96 };
  97
  98 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
  99
 100
 101 string getRawName(string const & family)
 102 {
 103         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 104                 if (family == symbol_fonts[i].family)
 105                         return symbol_fonts[i].xlfd;
 106
 107         LYXERR(Debug::FONT) << "BUG: family not found !" << endl;
 108         return string();
 109 }
 110
 111
 112 string const symbolFamily(LyXFont::FONT_FAMILY family)
 113 {
 114         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 115                 if (family == symbol_fonts[i].lyx_family)
 116                         return symbol_fonts[i].family;
 117         }
 118         return string();
 119 }
 120
 121
 122 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 123 {
 124         return family >= LyXFont::SYMBOL_FAMILY &&
 125                family <= LyXFont::ESINT_FAMILY;
 126 }
 127
 128
 129 bool isChosenFont(QFont & font, string const & family)
 130 {
 131         // QFontInfo won't find a font that has only a few glyphs at unusual
 132         // positions, e.g. the original esint10 font.
 133         // The workaround is to add dummy glyphs at least at all ASCII
 134         // positions.
 135         QFontInfo fi(font);
 136
 137         LYXERR(Debug::FONT) << "got: " << fromqstr(fi.family()) << endl;
 138
 139         if (contains(fromqstr(fi.family()), family)) {
 140                 LYXERR(Debug::FONT) << " got it ";
 141                 return true;
 142         }
 143
 144         return false;
 145 }
 146
 147
 148 pair<QFont, bool> const getSymbolFont(string const & family)
 149 {
 150         LYXERR(Debug::FONT) << "Looking for font family "
 151                 << family << " ... ";
 152         string upper = family;
 153         upper[0] = toupper(family[0]);
 154
 155         QFont font;
 156         font.setKerning(false);
 157         font.setFamily(toqstr(family));
 158
 159         if (isChosenFont(font, family)) {
 160                 LYXERR(Debug::FONT) << "normal!" << endl;
 161                 return make_pair<QFont, bool>(font, true);
 162         }
 163
 164         LYXERR(Debug::FONT) << "Trying " << upper << " ... ";
 165         font.setFamily(toqstr(upper));
 166
 167         if (isChosenFont(font, upper)) {
 168                 LYXERR(Debug::FONT) << "upper!" << endl;
 169                 return make_pair<QFont, bool>(font, true);
 170         }
 171
 172         // A simple setFamily() fails on Qt 2
 173
 174         string const rawName = getRawName(family);
 175         LYXERR(Debug::FONT) << "Trying " << rawName << " ... ";
 176         font.setRawName(toqstr(rawName));
 177
 178         if (isChosenFont(font, family)) {
 179                 LYXERR(Debug::FONT) << "raw version!" << endl;
 180                 return make_pair<QFont, bool>(font, true);
 181         }
 182
 183         LYXERR(Debug::FONT) << " FAILED :-(" << endl;
 184         return make_pair<QFont, bool>(font, false);
 185 }
 186
 187 } // namespace anon
 188
 189
 190 GuiFontLoader::GuiFontLoader()
 191 {
 192         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 193                 for (int i2 = 0; i2 < 2; ++i2)
 194                         for (int i3 = 0; i3 < 4; ++i3)
 195                                 for (int i4 = 0; i4 < 10; ++i4)
 196                                         fontinfo_[i1][i2][i3][i4] = 0;
 197 }
 198
 199
 200 void GuiFontLoader::update()
 201 {
 202         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 203                 for (int i2 = 0; i2 < 2; ++i2)
 204                         for (int i3 = 0; i3 < 4; ++i3)
 205                                 for (int i4 = 0; i4 < 10; ++i4) {
 206                                         delete fontinfo_[i1][i2][i3][i4];
 207                                         fontinfo_[i1][i2][i3][i4] = 0;
 208                                 }
 209 }
 210
 211
 212 /////////////////////////////////////////////////
 213
 214
 215 QLFontInfo::QLFontInfo(LyXFont const & f)
 216 {
 217         font.setKerning(false);
 218         string const pat = symbolFamily(f.family());
 219         if (!pat.empty()) {
 220                 bool tmp;
 221                 boost::tie(font, tmp) = getSymbolFont(pat);
 222         } else {
 223                 switch (f.family()) {
 224                 case LyXFont::ROMAN_FAMILY:
 225                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 226                                                     lyxrc.roman_font_foundry)));
 227                         break;
 228                 case LyXFont::SANS_FAMILY:
 229                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 230                                                     lyxrc.sans_font_foundry)));
 231                         break;
 232                 case LyXFont::TYPEWRITER_FAMILY:
 233                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 234                                                     lyxrc.typewriter_font_foundry)));
 235                         break;
 236                 default:
 237                         break;
 238                 }
 239         }
 240
 241         switch (f.series()) {
 242                 case LyXFont::MEDIUM_SERIES:
 243                         font.setWeight(QFont::Normal);
 244                         break;
 245                 case LyXFont::BOLD_SERIES:
 246                         font.setWeight(QFont::Bold);
 247                         break;
 248                 default:
 249                         break;
 250         }
 251
 252         switch (f.realShape()) {
 253                 case LyXFont::ITALIC_SHAPE:
 254                 case LyXFont::SLANTED_SHAPE:
 255                         font.setItalic(true);
 256                         break;
 257                 default:
 258                         break;
 259         }
 260
 261         LYXERR(Debug::FONT) << "Font '" << to_utf8(f.stateText(0))
 262                 << "' matched by\n" << fromqstr(font.family()) << endl;
 263
 264         // Is this an exact match?
 265         if (font.exactMatch())
 266                 LYXERR(Debug::FONT) << "This font is an exact match" << endl;
 267         else
 268                 LYXERR(Debug::FONT) << "This font is NOT an exact match"
 269                                     << endl;
 270
 271         LYXERR(Debug::FONT) << "XFLD: " << fromqstr(font.rawName()) << endl;
 272
 273         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 274                                * lyxrc.zoom / 100.0);
 275
 276         LYXERR(Debug::FONT) << "The font has size: "
 277                             << font.pointSizeF() << endl;
 278
 279         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 280                 metrics.reset(new GuiFontMetrics(font));
 281         }
 282         else {
 283                 // handle small caps ourselves ...
 284                 LyXFont smallfont = f;
 285                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 286                 QFont font2(font);
 287                 font2.setKerning(false);
 288                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 289                                * lyxrc.zoom / 100.0);
 290
 291                 metrics.reset(new GuiFontMetrics(font, font2));
 292         }
 293
 294 }
 295
 296
 297 bool GuiFontLoader::available(LyXFont const & f)
 298 {
 299         static vector<int> cache_set(LyXFont::NUM_FAMILIES, false);
 300         static vector<int> cache(LyXFont::NUM_FAMILIES, false);
 301
 302         LyXFont::FONT_FAMILY family = f.family();
 303         if (cache_set[family])
 304                 return cache[family];
 305         cache_set[family] = true;
 306
 307         string const pat = symbolFamily(family);
 308         if (pat.empty())
 309                 // We don't care about non-symbol fonts
 310                 return false;
 311
 312         pair<QFont, bool> tmp = getSymbolFont(pat);
 313         if (!tmp.second)
 314                 return false;
 315
 316         cache[family] = true;
 317         return true;
 318 }
 319
 320 } // namespace frontend
 321 } // namespace lyx