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