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