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