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