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