src/frontends/qt4/GuiFontLoader.cpp

   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 #include "support/Package.h"
  25 #include "support/os.h"
  26
  27 #include <QFontInfo>
  28 #include <QFontDatabase>
  29
  30 using lyx::support::contains;
  31 using lyx::support::package;
  32 using lyx::support::addPath;
  33 using lyx::support::addName;
  34
  35 using std::endl;
  36 using std::make_pair;
  37
  38 using std::pair;
  39 using std::vector;
  40 using std::string;
  41
  42 #if QT_VERSION >= 0x040200
  43 string const math_fonts[] = {"cmex10", "cmmi10", "cmr10", "cmsy10",
  44         "eufm10", "msam10", "msbm10", "wasy10", "esint10"};
  45 int const num_math_fonts = sizeof(math_fonts) / sizeof(*math_fonts);
  46 #endif
  47
  48
  49 namespace lyx {
  50 namespace frontend {
  51
  52 namespace {
  53
  54 struct symbol_font {
  55         Font::FONT_FAMILY lyx_family;
  56         string family;
  57         string xlfd;
  58 };
  59
  60 symbol_font symbol_fonts[] = {
  61         { Font::SYMBOL_FAMILY,
  62                 "symbol",
  63                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  64
  65         { Font::CMR_FAMILY,
  66                 "cmr10",
  67                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  68
  69         { Font::CMSY_FAMILY,
  70                 "cmsy10",
  71                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  72
  73         { Font::CMM_FAMILY,
  74                 "cmmi10",
  75                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  76
  77         { Font::CMEX_FAMILY,
  78                 "cmex10",
  79                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  80
  81         { Font::MSA_FAMILY,
  82                 "msam10",
  83                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
  84
  85         { Font::MSB_FAMILY,
  86                 "msbm10",
  87                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
  88
  89         { Font::EUFRAK_FAMILY,
  90                 "eufm10",
  91                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  92
  93         { Font::WASY_FAMILY,
  94                 "wasy10",
  95                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  96
  97         { Font::ESINT_FAMILY,
  98                 "esint10",
  99                 "-*-esint10-medium-*-*-*-*-*-*-*-*-*-*-*" }
 100 };
 101
 102 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
 103
 104
 105 string getRawName(string const & family)
 106 {
 107         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 108                 if (family == symbol_fonts[i].family)
 109                         return symbol_fonts[i].xlfd;
 110
 111         LYXERR(Debug::FONT) << "BUG: family not found !" << endl;
 112         return string();
 113 }
 114
 115
 116 string const symbolFamily(Font::FONT_FAMILY family)
 117 {
 118         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 119                 if (family == symbol_fonts[i].lyx_family)
 120                         return symbol_fonts[i].family;
 121         }
 122         return string();
 123 }
 124
 125
 126 bool isSymbolFamily(Font::FONT_FAMILY family)
 127 {
 128         return family >= Font::SYMBOL_FAMILY &&
 129                family <= Font::ESINT_FAMILY;
 130 }
 131
 132
 133 bool isChosenFont(QFont & font, string const & family)
 134 {
 135         // QFontInfo won't find a font that has only a few glyphs at unusual
 136         // positions, e.g. the original esint10 font.
 137         // The workaround is to add dummy glyphs at least at all ASCII
 138         // positions.
 139         QFontInfo fi(font);
 140
 141         LYXERR(Debug::FONT) << "got: " << fromqstr(fi.family()) << endl;
 142
 143         if (contains(fromqstr(fi.family()), family)) {
 144                 LYXERR(Debug::FONT) << " got it ";
 145                 return true;
 146         }
 147
 148         return false;
 149 }
 150
 151
 152 pair<QFont, bool> const getSymbolFont(string const & family)
 153 {
 154         LYXERR(Debug::FONT) << "Looking for font family "
 155                 << family << " ... ";
 156         string upper = family;
 157         upper[0] = toupper(family[0]);
 158
 159         QFont font;
 160         font.setKerning(false);
 161         font.setFamily(toqstr(family));
 162
 163         if (isChosenFont(font, family)) {
 164                 LYXERR(Debug::FONT) << "normal!" << endl;
 165                 return make_pair<QFont, bool>(font, true);
 166         }
 167
 168         LYXERR(Debug::FONT) << "Trying " << upper << " ... ";
 169         font.setFamily(toqstr(upper));
 170
 171         if (isChosenFont(font, upper)) {
 172                 LYXERR(Debug::FONT) << "upper!" << endl;
 173                 return make_pair<QFont, bool>(font, true);
 174         }
 175
 176         // A simple setFamily() fails on Qt 2
 177
 178         string const rawName = getRawName(family);
 179         LYXERR(Debug::FONT) << "Trying " << rawName << " ... ";
 180         font.setRawName(toqstr(rawName));
 181
 182         if (isChosenFont(font, family)) {
 183                 LYXERR(Debug::FONT) << "raw version!" << endl;
 184                 return make_pair<QFont, bool>(font, true);
 185         }
 186
 187         LYXERR(Debug::FONT) << " FAILED :-(" << endl;
 188         return make_pair<QFont, bool>(font, false);
 189 }
 190
 191 } // namespace anon
 192
 193
 194 GuiFontLoader::GuiFontLoader()
 195 {
 196 #if QT_VERSION >= 0x040200
 197         fontID = new int[num_math_fonts];
 198
 199         string const fonts_dir =
 200                 addPath(package().system_support().absFilename(), "fonts");
 201
 202         for (int i = 0 ; i < num_math_fonts; ++i) {
 203                 string const font_file = lyx::support::os::external_path(
 204                                 addName(fonts_dir, math_fonts[i] + ".ttf"));
 205                 fontID[i] = QFontDatabase::addApplicationFont(toqstr(font_file));
 206
 207                 LYXERR(Debug::FONT) << "Adding font " << font_file
 208                                     << static_cast<const char *>
 209                                         (fontID[i] < 0 ? " FAIL" : " OK")
 210                                     << endl;
 211         }
 212 #endif
 213
 214         for (int i1 = 0; i1 < Font::NUM_FAMILIES; ++i1)
 215                 for (int i2 = 0; i2 < 2; ++i2)
 216                         for (int i3 = 0; i3 < 4; ++i3)
 217                                 for (int i4 = 0; i4 < 10; ++i4)
 218                                         fontinfo_[i1][i2][i3][i4] = 0;
 219 }
 220
 221
 222 GuiFontLoader::~GuiFontLoader()
 223 {
 224 #if QT_VERSION >= 0x040200
 225         for (int i = 0 ; i < num_math_fonts; ++i) {
 226                 if (fontID[i] >= 0)
 227                         QFontDatabase::removeApplicationFont(fontID[i]);
 228         }
 229
 230         delete [] fontID;
 231 #endif
 232 }
 233
 234
 235 void GuiFontLoader::update()
 236 {
 237         for (int i1 = 0; i1 < Font::NUM_FAMILIES; ++i1) {
 238                 for (int i2 = 0; i2 < 2; ++i2)
 239                         for (int i3 = 0; i3 < 4; ++i3)
 240                                 for (int i4 = 0; i4 < 10; ++i4) {
 241                                         delete fontinfo_[i1][i2][i3][i4];
 242                                         fontinfo_[i1][i2][i3][i4] = 0;
 243                                 }
 244         }
 245 }
 246
 247
 248 /////////////////////////////////////////////////
 249
 250
 251 QLFontInfo::QLFontInfo(Font const & f)
 252 {
 253         font.setKerning(false);
 254         string const pat = symbolFamily(f.family());
 255         if (!pat.empty()) {
 256                 bool tmp;
 257                 boost::tie(font, tmp) = getSymbolFont(pat);
 258         } else {
 259                 switch (f.family()) {
 260                 case Font::ROMAN_FAMILY: {
 261                         QString family = toqstr(makeFontName(lyxrc.roman_font_name,
 262                                                                                                                                                                          lyxrc.roman_font_foundry));
 263                         font.setFamily(family);
 264 #ifdef Q_WS_MACX
 265 #if QT_VERSION >= 0x040300
 266                         // Workaround for a Qt bug, see http://bugzilla.lyx.org/show_bug.cgi?id=3684
 267                         // It is reported to Trolltech at 02/06/07 against 4.3 final.
 268                         // FIXME: Add an upper version limit as soon as the bug is fixed in Qt.
 269                         if (family == "Times" && !font.exactMatch())
 270                                 font.setFamily(QString::fromLatin1("Times New Roman"));
 271 #endif
 272 #endif
 273                         break;
 274                 }
 275                 case Font::SANS_FAMILY:
 276                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 277                                                     lyxrc.sans_font_foundry)));
 278                         break;
 279                 case Font::TYPEWRITER_FAMILY:
 280                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 281                                                     lyxrc.typewriter_font_foundry)));
 282                         break;
 283                 default:
 284                         break;
 285                 }
 286         }
 287
 288         switch (f.series()) {
 289                 case Font::MEDIUM_SERIES:
 290                         font.setWeight(QFont::Normal);
 291                         break;
 292                 case Font::BOLD_SERIES:
 293                         font.setWeight(QFont::Bold);
 294                         break;
 295                 default:
 296                         break;
 297         }
 298
 299         switch (f.realShape()) {
 300                 case Font::ITALIC_SHAPE:
 301                 case Font::SLANTED_SHAPE:
 302                         font.setItalic(true);
 303                         break;
 304                 default:
 305                         break;
 306         }
 307
 308         LYXERR(Debug::FONT) << "Font '" << to_utf8(f.stateText(0))
 309                 << "' matched by\n" << fromqstr(font.family()) << endl;
 310
 311         // Is this an exact match?
 312         if (font.exactMatch())
 313                 LYXERR(Debug::FONT) << "This font is an exact match" << endl;
 314         else
 315                 LYXERR(Debug::FONT) << "This font is NOT an exact match"
 316                                     << endl;
 317
 318         LYXERR(Debug::FONT) << "XFLD: " << fromqstr(font.rawName()) << endl;
 319
 320         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 321                                * lyxrc.zoom / 100.0);
 322
 323         LYXERR(Debug::FONT) << "The font has size: "
 324                             << font.pointSizeF() << endl;
 325
 326         if (f.realShape() != Font::SMALLCAPS_SHAPE) {
 327                 metrics.reset(new GuiFontMetrics(font));
 328         }
 329         else {
 330                 // handle small caps ourselves ...
 331                 Font smallfont = f;
 332                 smallfont.decSize().decSize().setShape(Font::UP_SHAPE);
 333                 QFont font2(font);
 334                 font2.setKerning(false);
 335                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 336                                * lyxrc.zoom / 100.0);
 337
 338                 metrics.reset(new GuiFontMetrics(font, font2));
 339         }
 340
 341 }
 342
 343
 344 bool GuiFontLoader::available(Font const & f)
 345 {
 346         static vector<int> cache_set(Font::NUM_FAMILIES, false);
 347         static vector<int> cache(Font::NUM_FAMILIES, false);
 348
 349         Font::FONT_FAMILY family = f.family();
 350         if (cache_set[family])
 351                 return cache[family];
 352         cache_set[family] = true;
 353
 354         string const pat = symbolFamily(family);
 355         if (pat.empty())
 356                 // We don't care about non-symbol fonts
 357                 return false;
 358
 359         pair<QFont, bool> tmp = getSymbolFont(pat);
 360         if (!tmp.second)
 361                 return false;
 362
 363         cache[family] = true;
 364         return true;
 365 }
 366
 367 } // namespace frontend
 368 } // namespace lyx