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 QString const math_fonts[] = {"cmex10", "cmmi10", "cmr10", "cmsy10",
  44         "eufm10", "msam10", "msbm10", "wasy10", "esint10"};
  45 int const num_math_fonts = sizeof(math_fonts) / sizeof(*math_fonts);
  46
  47
  48 namespace lyx {
  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 !" << endl;
 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 &&
 131                family <= ESINT_FAMILY;
 132 }
 133
 134
 135 static bool isChosenFont(QFont & font, QString 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 (fi.family().contains(family)) {
 146                 LYXERR(Debug::FONT) << " got it ";
 147                 return true;
 148         }
 149
 150         return false;
 151 }
 152
 153
 154 static pair<QFont, bool> const getSymbolFont(QString const & family)
 155 {
 156         LYXERR(Debug::FONT) << "Looking for font family "
 157                 << fromqstr(family) << " ... ";
 158         QString upper = family;
 159         upper[0] = family[0].toUpper();
 160
 161         QFont font;
 162         font.setKerning(false);
 163         font.setFamily(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 " << fromqstr(upper) << " ... ";
 171         font.setFamily(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         QString const rawName = getRawName(family);
 181         LYXERR(Debug::FONT) << "Trying " << fromqstr(rawName) << " ... ";
 182         font.setRawName(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         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
 211         for (int i1 = 0; i1 < NUM_FAMILIES; ++i1)
 212                 for (int i2 = 0; i2 < 2; ++i2)
 213                         for (int i3 = 0; i3 < 4; ++i3)
 214                                 for (int i4 = 0; i4 < 10; ++i4)
 215                                         fontinfo_[i1][i2][i3][i4] = 0;
 216 }
 217
 218
 219 void GuiFontLoader::update()
 220 {
 221         for (int i1 = 0; i1 < NUM_FAMILIES; ++i1) {
 222                 for (int i2 = 0; i2 < 2; ++i2)
 223                         for (int i3 = 0; i3 < 4; ++i3)
 224                                 for (int i4 = 0; i4 < 10; ++i4) {
 225                                         delete fontinfo_[i1][i2][i3][i4];
 226                                         fontinfo_[i1][i2][i3][i4] = 0;
 227                                 }
 228         }
 229 }
 230
 231
 232 /////////////////////////////////////////////////
 233
 234
 235 static QString makeFontName(QString const & family, QString const & foundry)
 236 {
 237         QString res = family;
 238         if (!foundry.isEmpty())
 239                 res += " [" + foundry + ']';
 240         return res;
 241 }
 242
 243
 244 GuiFontInfo::GuiFontInfo(FontInfo const & f)
 245 {
 246         font.setKerning(false);
 247         QString const pat = symbolFamily(f.family());
 248         if (!pat.isEmpty()) {
 249                 bool tmp;
 250                 boost::tie(font, tmp) = getSymbolFont(pat);
 251         } else {
 252                 switch (f.family()) {
 253                 case ROMAN_FAMILY: {
 254                         QString family = makeFontName(toqstr(lyxrc.roman_font_name),
 255                                                                                                                                                 toqstr(lyxrc.roman_font_foundry));
 256                         font.setFamily(family);
 257 #ifdef Q_WS_MACX
 258 #if QT_VERSION >= 0x040300
 259                         // Workaround for a Qt bug, see http://bugzilla.lyx.org/show_bug.cgi?id=3684
 260                         // It is reported to Trolltech at 02/06/07 against 4.3 final.
 261                         // FIXME: Add an upper version limit as soon as the bug is fixed in Qt.
 262                         if (family == "Times" && !font.exactMatch())
 263                                 font.setFamily("Times New Roman");
 264 #endif
 265 #endif
 266                         break;
 267                 }
 268                 case SANS_FAMILY:
 269                         font.setFamily(makeFontName(toqstr(lyxrc.sans_font_name),
 270                                                     toqstr(lyxrc.sans_font_foundry)));
 271                         break;
 272                 case TYPEWRITER_FAMILY:
 273                         font.setFamily(makeFontName(toqstr(lyxrc.typewriter_font_name),
 274                                                     toqstr(lyxrc.typewriter_font_foundry)));
 275                         break;
 276                 default:
 277                         break;
 278                 }
 279         }
 280
 281         switch (f.series()) {
 282                 case MEDIUM_SERIES:
 283                         font.setWeight(QFont::Normal);
 284                         break;
 285                 case BOLD_SERIES:
 286                         font.setWeight(QFont::Bold);
 287                         break;
 288                 default:
 289                         break;
 290         }
 291
 292         switch (f.realShape()) {
 293                 case ITALIC_SHAPE:
 294                 case SLANTED_SHAPE:
 295                         font.setItalic(true);
 296                         break;
 297                 default:
 298                         break;
 299         }
 300
 301         LYXERR(Debug::FONT) << "Font '" << to_utf8(stateText(f))
 302                 << "' matched by\n" << fromqstr(font.family()) << endl;
 303
 304         // Is this an exact match?
 305         if (font.exactMatch())
 306                 LYXERR(Debug::FONT) << "This font is an exact match" << endl;
 307         else
 308                 LYXERR(Debug::FONT) << "This font is NOT an exact match"
 309                                     << endl;
 310
 311         LYXERR(Debug::FONT) << "XFLD: " << fromqstr(font.rawName()) << endl;
 312
 313         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 314                                * lyxrc.zoom / 100.0);
 315
 316         LYXERR(Debug::FONT) << "The font has size: "
 317                             << font.pointSizeF() << endl;
 318
 319         if (f.realShape() != SMALLCAPS_SHAPE) {
 320                 metrics.reset(new GuiFontMetrics(font));
 321         }
 322         else {
 323                 // handle small caps ourselves ...
 324                 FontInfo smallfont = f;
 325                 smallfont.decSize().decSize().setShape(UP_SHAPE);
 326                 QFont font2(font);
 327                 font2.setKerning(false);
 328                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 329                                * lyxrc.zoom / 100.0);
 330
 331                 metrics.reset(new GuiFontMetrics(font, font2));
 332         }
 333
 334 }
 335
 336
 337 bool GuiFontLoader::available(FontInfo const & f)
 338 {
 339         static vector<int> cache_set(NUM_FAMILIES, false);
 340         static vector<int> cache(NUM_FAMILIES, false);
 341
 342         FontFamily family = f.family();
 343         if (cache_set[family])
 344                 return cache[family];
 345         cache_set[family] = true;
 346
 347         QString const pat = symbolFamily(family);
 348         if (pat.isEmpty())
 349                 // We don't care about non-symbol fonts
 350                 return false;
 351
 352         pair<QFont, bool> tmp = getSymbolFont(pat);
 353         if (!tmp.second)
 354                 return false;
 355
 356         cache[family] = true;
 357         return true;
 358 }
 359
 360 } // namespace frontend
 361 } // namespace lyx