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 <qfontinfo.h>
  28 #include <QFontDatabase>
  29
  30 #include <boost/tuple/tuple.hpp>
  31
  32 #ifdef Q_WS_X11
  33 #include <qwidget.h>
  34 //#include <X11/Xlib.h>
  35 #include <algorithm>
  36 #endif
  37
  38 using lyx::support::contains;
  39 using lyx::support::package;
  40 using lyx::support::addPath;
  41 using lyx::support::addName;
  42
  43 using std::endl;
  44 using std::make_pair;
  45
  46 using std::pair;
  47 using std::vector;
  48 using std::string;
  49
  50 #if QT_VERSION >= 0x040200
  51 string const math_fonts[] = {"cmex10", "cmmi10", "cmr10", "cmsy10",
  52         "eufm10", "msam10", "msbm10", "wasy10", "esint10"};
  53 int const num_math_fonts = sizeof(math_fonts) / sizeof(*math_fonts);
  54 #endif
  55
  56
  57 namespace lyx {
  58 namespace frontend {
  59
  60 namespace {
  61
  62 struct symbol_font {
  63         Font::FONT_FAMILY lyx_family;
  64         string family;
  65         string xlfd;
  66 };
  67
  68 symbol_font symbol_fonts[] = {
  69         { Font::SYMBOL_FAMILY,
  70                 "symbol",
  71                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  72
  73         { Font::CMR_FAMILY,
  74                 "cmr10",
  75                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  76
  77         { Font::CMSY_FAMILY,
  78                 "cmsy10",
  79                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  80
  81         { Font::CMM_FAMILY,
  82                 "cmmi10",
  83                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  84
  85         { Font::CMEX_FAMILY,
  86                 "cmex10",
  87                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  88
  89         { Font::MSA_FAMILY,
  90                 "msam10",
  91                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
  92
  93         { Font::MSB_FAMILY,
  94                 "msbm10",
  95                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
  96
  97         { Font::EUFRAK_FAMILY,
  98                 "eufm10",
  99                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 100
 101         { Font::WASY_FAMILY,
 102                 "wasy10",
 103                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 104
 105         { Font::ESINT_FAMILY,
 106                 "esint10",
 107                 "-*-esint10-medium-*-*-*-*-*-*-*-*-*-*-*" }
 108 };
 109
 110 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
 111
 112
 113 string getRawName(string const & family)
 114 {
 115         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 116                 if (family == symbol_fonts[i].family)
 117                         return symbol_fonts[i].xlfd;
 118
 119         LYXERR(Debug::FONT) << "BUG: family not found !" << endl;
 120         return string();
 121 }
 122
 123
 124 string const symbolFamily(Font::FONT_FAMILY family)
 125 {
 126         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 127                 if (family == symbol_fonts[i].lyx_family)
 128                         return symbol_fonts[i].family;
 129         }
 130         return string();
 131 }
 132
 133
 134 bool isSymbolFamily(Font::FONT_FAMILY family)
 135 {
 136         return family >= Font::SYMBOL_FAMILY &&
 137                family <= Font::ESINT_FAMILY;
 138 }
 139
 140
 141 bool isChosenFont(QFont & font, string const & family)
 142 {
 143         // QFontInfo won't find a font that has only a few glyphs at unusual
 144         // positions, e.g. the original esint10 font.
 145         // The workaround is to add dummy glyphs at least at all ASCII
 146         // positions.
 147         QFontInfo fi(font);
 148
 149         LYXERR(Debug::FONT) << "got: " << fromqstr(fi.family()) << endl;
 150
 151         if (contains(fromqstr(fi.family()), family)) {
 152                 LYXERR(Debug::FONT) << " got it ";
 153                 return true;
 154         }
 155
 156         return false;
 157 }
 158
 159
 160 pair<QFont, bool> const getSymbolFont(string const & family)
 161 {
 162         LYXERR(Debug::FONT) << "Looking for font family "
 163                 << family << " ... ";
 164         string upper = family;
 165         upper[0] = toupper(family[0]);
 166
 167         QFont font;
 168         font.setKerning(false);
 169         font.setFamily(toqstr(family));
 170
 171         if (isChosenFont(font, family)) {
 172                 LYXERR(Debug::FONT) << "normal!" << endl;
 173                 return make_pair<QFont, bool>(font, true);
 174         }
 175
 176         LYXERR(Debug::FONT) << "Trying " << upper << " ... ";
 177         font.setFamily(toqstr(upper));
 178
 179         if (isChosenFont(font, upper)) {
 180                 LYXERR(Debug::FONT) << "upper!" << endl;
 181                 return make_pair<QFont, bool>(font, true);
 182         }
 183
 184         // A simple setFamily() fails on Qt 2
 185
 186         string const rawName = getRawName(family);
 187         LYXERR(Debug::FONT) << "Trying " << rawName << " ... ";
 188         font.setRawName(toqstr(rawName));
 189
 190         if (isChosenFont(font, family)) {
 191                 LYXERR(Debug::FONT) << "raw version!" << endl;
 192                 return make_pair<QFont, bool>(font, true);
 193         }
 194
 195         LYXERR(Debug::FONT) << " FAILED :-(" << endl;
 196         return make_pair<QFont, bool>(font, false);
 197 }
 198
 199 } // namespace anon
 200
 201
 202 GuiFontLoader::GuiFontLoader()
 203 {
 204 #if QT_VERSION >= 0x040200
 205         fontID = new int[num_math_fonts];
 206
 207         string const fonts_dir =
 208                 addPath(package().system_support().absFilename(), "fonts");
 209
 210         for (int i = 0 ; i < num_math_fonts; ++i) {
 211                 string const font_file = lyx::support::os::external_path(
 212                                 addName(fonts_dir, math_fonts[i] + ".ttf"));
 213                 fontID[i] = QFontDatabase::addApplicationFont(toqstr(font_file));
 214
 215                 LYXERR(Debug::FONT) << "Adding font " << font_file
 216                                     << static_cast<const char *>
 217                                         (fontID[i] < 0 ? " FAIL" : " OK")
 218                                     << endl;
 219         }
 220 #endif
 221
 222         for (int i1 = 0; i1 < Font::NUM_FAMILIES; ++i1)
 223                 for (int i2 = 0; i2 < 2; ++i2)
 224                         for (int i3 = 0; i3 < 4; ++i3)
 225                                 for (int i4 = 0; i4 < 10; ++i4)
 226                                         fontinfo_[i1][i2][i3][i4] = 0;
 227 }
 228
 229
 230 GuiFontLoader::~GuiFontLoader()
 231 {
 232 #if QT_VERSION >= 0x040200
 233         for (int i = 0 ; i < num_math_fonts; ++i) {
 234                 if (fontID[i] >= 0)
 235                         QFontDatabase::removeApplicationFont(fontID[i]);
 236         }
 237
 238         delete [] fontID;
 239 #endif
 240 }
 241
 242
 243 void GuiFontLoader::update()
 244 {
 245         for (int i1 = 0; i1 < Font::NUM_FAMILIES; ++i1) {
 246                 for (int i2 = 0; i2 < 2; ++i2)
 247                         for (int i3 = 0; i3 < 4; ++i3)
 248                                 for (int i4 = 0; i4 < 10; ++i4) {
 249                                         delete fontinfo_[i1][i2][i3][i4];
 250                                         fontinfo_[i1][i2][i3][i4] = 0;
 251                                 }
 252         }
 253 }
 254
 255
 256 /////////////////////////////////////////////////
 257
 258
 259 QLFontInfo::QLFontInfo(Font const & f)
 260 {
 261         font.setKerning(false);
 262         string const pat = symbolFamily(f.family());
 263         if (!pat.empty()) {
 264                 bool tmp;
 265                 boost::tie(font, tmp) = getSymbolFont(pat);
 266         } else {
 267                 switch (f.family()) {
 268                 case Font::ROMAN_FAMILY: {
 269                         QString family = toqstr(makeFontName(lyxrc.roman_font_name,
 270                                                                                                                                                                          lyxrc.roman_font_foundry));
 271                         font.setFamily(family);
 272 #ifdef Q_WS_MACX
 273 #if QT_VERSION >= 0x040300
 274                         // Workaround for a Qt bug, see http://bugzilla.lyx.org/show_bug.cgi?id=3684
 275                         // It is reported to Trolltech at 02/06/07 against 4.3 final.
 276                         // FIXME: Add an upper version limit as soon as the bug is fixed in Qt.
 277                         if (family == "Times" && !font.exactMatch())
 278                                 font.setFamily(QString::fromLatin1("Times New Roman"));
 279 #endif
 280 #endif
 281                         break;
 282                 }
 283                 case Font::SANS_FAMILY:
 284                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 285                                                     lyxrc.sans_font_foundry)));
 286                         break;
 287                 case Font::TYPEWRITER_FAMILY:
 288                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 289                                                     lyxrc.typewriter_font_foundry)));
 290                         break;
 291                 default:
 292                         break;
 293                 }
 294         }
 295
 296         switch (f.series()) {
 297                 case Font::MEDIUM_SERIES:
 298                         font.setWeight(QFont::Normal);
 299                         break;
 300                 case Font::BOLD_SERIES:
 301                         font.setWeight(QFont::Bold);
 302                         break;
 303                 default:
 304                         break;
 305         }
 306
 307         switch (f.realShape()) {
 308                 case Font::ITALIC_SHAPE:
 309                 case Font::SLANTED_SHAPE:
 310                         font.setItalic(true);
 311                         break;
 312                 default:
 313                         break;
 314         }
 315
 316         LYXERR(Debug::FONT) << "Font '" << to_utf8(f.stateText(0))
 317                 << "' matched by\n" << fromqstr(font.family()) << endl;
 318
 319         // Is this an exact match?
 320         if (font.exactMatch())
 321                 LYXERR(Debug::FONT) << "This font is an exact match" << endl;
 322         else
 323                 LYXERR(Debug::FONT) << "This font is NOT an exact match"
 324                                     << endl;
 325
 326         LYXERR(Debug::FONT) << "XFLD: " << fromqstr(font.rawName()) << endl;
 327
 328         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 329                                * lyxrc.zoom / 100.0);
 330
 331         LYXERR(Debug::FONT) << "The font has size: "
 332                             << font.pointSizeF() << endl;
 333
 334         if (f.realShape() != Font::SMALLCAPS_SHAPE) {
 335                 metrics.reset(new GuiFontMetrics(font));
 336         }
 337         else {
 338                 // handle small caps ourselves ...
 339                 Font smallfont = f;
 340                 smallfont.decSize().decSize().setShape(Font::UP_SHAPE);
 341                 QFont font2(font);
 342                 font2.setKerning(false);
 343                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 344                                * lyxrc.zoom / 100.0);
 345
 346                 metrics.reset(new GuiFontMetrics(font, font2));
 347         }
 348
 349 }
 350
 351
 352 bool GuiFontLoader::available(Font const & f)
 353 {
 354         static vector<int> cache_set(Font::NUM_FAMILIES, false);
 355         static vector<int> cache(Font::NUM_FAMILIES, false);
 356
 357         Font::FONT_FAMILY family = f.family();
 358         if (cache_set[family])
 359                 return cache[family];
 360         cache_set[family] = true;
 361
 362         string const pat = symbolFamily(family);
 363         if (pat.empty())
 364                 // We don't care about non-symbol fonts
 365                 return false;
 366
 367         pair<QFont, bool> tmp = getSymbolFont(pat);
 368         if (!tmp.second)
 369                 return false;
 370
 371         cache[family] = true;
 372         return true;
 373 }
 374
 375 } // namespace frontend
 376 } // namespace lyx