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
  25 #include <qfontinfo.h>
  26
  27 #include <boost/tuple/tuple.hpp>
  28
  29 #ifdef Q_WS_X11
  30 #include <qwidget.h>
  31 //#include <X11/Xlib.h>
  32 #include <algorithm>
  33 #endif
  34
  35 using lyx::support::contains;
  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
  45 namespace lyx {
  46 namespace frontend {
  47
  48 namespace {
  49
  50 struct symbol_font {
  51         Font::FONT_FAMILY lyx_family;
  52         string family;
  53         string xlfd;
  54 };
  55
  56 symbol_font symbol_fonts[] = {
  57         { Font::SYMBOL_FAMILY,
  58                 "symbol",
  59                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  60
  61         { Font::CMR_FAMILY,
  62                 "cmr10",
  63                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  64
  65         { Font::CMSY_FAMILY,
  66                 "cmsy10",
  67                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  68
  69         { Font::CMM_FAMILY,
  70                 "cmmi10",
  71                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  72
  73         { Font::CMEX_FAMILY,
  74                 "cmex10",
  75                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  76
  77         { Font::MSA_FAMILY,
  78                 "msam10",
  79                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
  80
  81         { Font::MSB_FAMILY,
  82                 "msbm10",
  83                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
  84
  85         { Font::EUFRAK_FAMILY,
  86                 "eufm10",
  87                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  88
  89         { Font::WASY_FAMILY,
  90                 "wasy10",
  91                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  92
  93         { Font::ESINT_FAMILY,
  94                 "esint10",
  95                 "-*-esint10-medium-*-*-*-*-*-*-*-*-*-*-*" }
  96 };
  97
  98 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
  99
 100
 101 string getRawName(string const & family)
 102 {
 103         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 104                 if (family == symbol_fonts[i].family)
 105                         return symbol_fonts[i].xlfd;
 106
 107         LYXERR(Debug::FONT) << "BUG: family not found !" << endl;
 108         return string();
 109 }
 110
 111
 112 string const symbolFamily(Font::FONT_FAMILY family)
 113 {
 114         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 115                 if (family == symbol_fonts[i].lyx_family)
 116                         return symbol_fonts[i].family;
 117         }
 118         return string();
 119 }
 120
 121
 122 bool isSymbolFamily(Font::FONT_FAMILY family)
 123 {
 124         return family >= Font::SYMBOL_FAMILY &&
 125                family <= Font::ESINT_FAMILY;
 126 }
 127
 128
 129 bool isChosenFont(QFont & font, string const & family)
 130 {
 131         // QFontInfo won't find a font that has only a few glyphs at unusual
 132         // positions, e.g. the original esint10 font.
 133         // The workaround is to add dummy glyphs at least at all ASCII
 134         // positions.
 135         QFontInfo fi(font);
 136
 137         LYXERR(Debug::FONT) << "got: " << fromqstr(fi.family()) << endl;
 138
 139         if (contains(fromqstr(fi.family()), family)) {
 140                 LYXERR(Debug::FONT) << " got it ";
 141                 return true;
 142         }
 143
 144         return false;
 145 }
 146
 147
 148 pair<QFont, bool> const getSymbolFont(string const & family)
 149 {
 150         LYXERR(Debug::FONT) << "Looking for font family "
 151                 << family << " ... ";
 152         string upper = family;
 153         upper[0] = toupper(family[0]);
 154
 155         QFont font;
 156         font.setKerning(false);
 157         font.setFamily(toqstr(family));
 158
 159         if (isChosenFont(font, family)) {
 160                 LYXERR(Debug::FONT) << "normal!" << endl;
 161                 return make_pair<QFont, bool>(font, true);
 162         }
 163
 164         LYXERR(Debug::FONT) << "Trying " << upper << " ... ";
 165         font.setFamily(toqstr(upper));
 166
 167         if (isChosenFont(font, upper)) {
 168                 LYXERR(Debug::FONT) << "upper!" << endl;
 169                 return make_pair<QFont, bool>(font, true);
 170         }
 171
 172         // A simple setFamily() fails on Qt 2
 173
 174         string const rawName = getRawName(family);
 175         LYXERR(Debug::FONT) << "Trying " << rawName << " ... ";
 176         font.setRawName(toqstr(rawName));
 177
 178         if (isChosenFont(font, family)) {
 179                 LYXERR(Debug::FONT) << "raw version!" << endl;
 180                 return make_pair<QFont, bool>(font, true);
 181         }
 182
 183         LYXERR(Debug::FONT) << " FAILED :-(" << endl;
 184         return make_pair<QFont, bool>(font, false);
 185 }
 186
 187 } // namespace anon
 188
 189
 190 GuiFontLoader::GuiFontLoader()
 191 {
 192         for (int i1 = 0; i1 < Font::NUM_FAMILIES; ++i1)
 193                 for (int i2 = 0; i2 < 2; ++i2)
 194                         for (int i3 = 0; i3 < 4; ++i3)
 195                                 for (int i4 = 0; i4 < 10; ++i4)
 196                                         fontinfo_[i1][i2][i3][i4] = 0;
 197 }
 198
 199
 200 void GuiFontLoader::update()
 201 {
 202         for (int i1 = 0; i1 < Font::NUM_FAMILIES; ++i1) {
 203                 for (int i2 = 0; i2 < 2; ++i2)
 204                         for (int i3 = 0; i3 < 4; ++i3)
 205                                 for (int i4 = 0; i4 < 10; ++i4) {
 206                                         delete fontinfo_[i1][i2][i3][i4];
 207                                         fontinfo_[i1][i2][i3][i4] = 0;
 208                                 }
 209         }
 210 }
 211
 212
 213 /////////////////////////////////////////////////
 214
 215
 216 QLFontInfo::QLFontInfo(Font const & f)
 217 {
 218         font.setKerning(false);
 219         string const pat = symbolFamily(f.family());
 220         if (!pat.empty()) {
 221                 bool tmp;
 222                 boost::tie(font, tmp) = getSymbolFont(pat);
 223         } else {
 224                 switch (f.family()) {
 225                 case Font::ROMAN_FAMILY: {
 226                         QString family = toqstr(makeFontName(lyxrc.roman_font_name,
 227                                                                                                                                                                          lyxrc.roman_font_foundry));
 228                         font.setFamily(family);
 229 #ifdef Q_WS_MACX
 230 #if QT_VERSION >= 0x040300
 231                         // Workaround for a Qt bug, see http://bugzilla.lyx.org/show_bug.cgi?id=3684
 232                         // It is reported to Trolltech at 02/06/07 against 4.3 final.
 233                         // FIXME: Add an upper version limit as soon as the bug is fixed in Qt.
 234                         if (family == "Times" && !font.exactMatch())
 235                                 font.setFamily(QString::fromLatin1("Times New Roman"));
 236 #endif
 237 #endif
 238                         break;
 239                 }
 240                 case Font::SANS_FAMILY:
 241                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 242                                                     lyxrc.sans_font_foundry)));
 243                         break;
 244                 case Font::TYPEWRITER_FAMILY:
 245                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 246                                                     lyxrc.typewriter_font_foundry)));
 247                         break;
 248                 default:
 249                         break;
 250                 }
 251         }
 252
 253         switch (f.series()) {
 254                 case Font::MEDIUM_SERIES:
 255                         font.setWeight(QFont::Normal);
 256                         break;
 257                 case Font::BOLD_SERIES:
 258                         font.setWeight(QFont::Bold);
 259                         break;
 260                 default:
 261                         break;
 262         }
 263
 264         switch (f.realShape()) {
 265                 case Font::ITALIC_SHAPE:
 266                 case Font::SLANTED_SHAPE:
 267                         font.setItalic(true);
 268                         break;
 269                 default:
 270                         break;
 271         }
 272
 273         LYXERR(Debug::FONT) << "Font '" << to_utf8(f.stateText(0))
 274                 << "' matched by\n" << fromqstr(font.family()) << endl;
 275
 276         // Is this an exact match?
 277         if (font.exactMatch())
 278                 LYXERR(Debug::FONT) << "This font is an exact match" << endl;
 279         else
 280                 LYXERR(Debug::FONT) << "This font is NOT an exact match"
 281                                     << endl;
 282
 283         LYXERR(Debug::FONT) << "XFLD: " << fromqstr(font.rawName()) << endl;
 284
 285         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 286                                * lyxrc.zoom / 100.0);
 287
 288         LYXERR(Debug::FONT) << "The font has size: "
 289                             << font.pointSizeF() << endl;
 290
 291         if (f.realShape() != Font::SMALLCAPS_SHAPE) {
 292                 metrics.reset(new GuiFontMetrics(font));
 293         }
 294         else {
 295                 // handle small caps ourselves ...
 296                 Font smallfont = f;
 297                 smallfont.decSize().decSize().setShape(Font::UP_SHAPE);
 298                 QFont font2(font);
 299                 font2.setKerning(false);
 300                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 301                                * lyxrc.zoom / 100.0);
 302
 303                 metrics.reset(new GuiFontMetrics(font, font2));
 304         }
 305
 306 }
 307
 308
 309 bool GuiFontLoader::available(Font const & f)
 310 {
 311         static vector<int> cache_set(Font::NUM_FAMILIES, false);
 312         static vector<int> cache(Font::NUM_FAMILIES, false);
 313
 314         Font::FONT_FAMILY family = f.family();
 315         if (cache_set[family])
 316                 return cache[family];
 317         cache_set[family] = true;
 318
 319         string const pat = symbolFamily(family);
 320         if (pat.empty())
 321                 // We don't care about non-symbol fonts
 322                 return false;
 323
 324         pair<QFont, bool> tmp = getSymbolFont(pat);
 325         if (!tmp.second)
 326                 return false;
 327
 328         cache[family] = true;
 329         return true;
 330 }
 331
 332 } // namespace frontend
 333 } // namespace lyx