src/frontends/qt2/qfont_loader.C

   1 /**
   2  * \file qfont_loader.C
   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 "debug.h"
  15 #include "qfont_loader.h"
  16 #include "qt_helpers.h"
  17 #include "lyxrc.h"
  18
  19 #include "support/lstrings.h"
  20 #include "frontends/lyx_gui.h"
  21
  22 #include <qfontinfo.h>
  23
  24 #include <boost/tuple/tuple.hpp>
  25
  26 #ifdef Q_WS_X11
  27 #include <qwidget.h>
  28 #include <X11/Xlib.h>
  29 #include <algorithm>
  30 #endif
  31 #include "support/systemcall.h"
  32 #include "support/filetools.h"
  33
  34 using lyx::support::contains;
  35 using lyx::support::LibFileSearch;
  36 using lyx::support::OnlyPath;
  37 using lyx::support::Systemcall;
  38
  39 using std::endl;
  40 using std::make_pair;
  41
  42 using std::pair;
  43 using std::vector;
  44 using std::string;
  45
  46 namespace {
  47
  48 void addFontPath()
  49 {
  50 #ifdef Q_WS_X11
  51         string const dir =  OnlyPath(LibFileSearch("xfonts", "fonts.dir"));
  52         if (!dir.empty()) {
  53                 QWidget w;
  54                 int n;
  55                 char ** p = XGetFontPath(w.x11Display(), &n);
  56                 if (std::find(p, p + n, dir) != p + n)
  57                         return;
  58                 lyxerr[Debug::FONT] << "Adding " << dir
  59                                     << " to the font path." << endl;
  60                 string const command = "xset fp+ " + dir;
  61                 Systemcall s;
  62                 if (!s.startscript(Systemcall::Wait, command))
  63                         return;
  64                 lyxerr << "Unable to add " << dir << "to the font path."
  65                        << endl;
  66         }
  67 #endif
  68 }
  69
  70
  71 struct symbol_font {
  72         LyXFont::FONT_FAMILY lyx_family;
  73         string family;
  74         string xlfd;
  75 };
  76
  77 symbol_font symbol_fonts[] = {
  78         { LyXFont::SYMBOL_FAMILY,
  79                 "symbol",
  80                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  81
  82         { LyXFont::CMR_FAMILY,
  83                 "cmr10",
  84                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  85
  86         { LyXFont::CMSY_FAMILY,
  87                 "cmsy10",
  88                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  89
  90         { LyXFont::CMM_FAMILY,
  91                 "cmmi10",
  92                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  93
  94         { LyXFont::CMEX_FAMILY,
  95                 "cmex10",
  96                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  97
  98         { LyXFont::MSA_FAMILY,
  99                 "msam10",
 100                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
 101
 102         { LyXFont::MSB_FAMILY,
 103                 "msbm10",
 104                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
 105
 106         { LyXFont::EUFRAK_FAMILY,
 107                 "eufm10",
 108                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 109
 110         { LyXFont::WASY_FAMILY,
 111                 "wasy10",
 112                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" }
 113 };
 114
 115 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
 116
 117
 118 string getRawName(string const & family)
 119 {
 120         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 121                 if (family == symbol_fonts[i].family)
 122                         return symbol_fonts[i].xlfd;
 123         }
 124         lyxerr[Debug::FONT] << "BUG: family not found !" << endl;
 125         return string();
 126 }
 127
 128
 129 string const symbolFamily(LyXFont::FONT_FAMILY family)
 130 {
 131         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 132                 if (family == symbol_fonts[i].lyx_family)
 133                         return symbol_fonts[i].family;
 134         }
 135         return string();
 136 }
 137
 138
 139 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 140 {
 141         return family >= LyXFont::SYMBOL_FAMILY &&
 142                 family <= LyXFont::WASY_FAMILY;
 143 }
 144
 145
 146 bool isChosenFont(QFont & font, string const & family)
 147 {
 148         lyxerr[Debug::FONT] << "raw: " << fromqstr(font.rawName()) << endl;
 149
 150         QFontInfo fi(font);
 151
 152         // Note Qt lies about family quite often
 153         lyxerr[Debug::FONT] << "alleged fi family: "
 154                 << fromqstr(fi.family()) << endl;
 155
 156         // So we check rawName first
 157         if (contains(fromqstr(font.rawName()), family)) {
 158                 lyxerr[Debug::FONT] << " got it ";
 159                 return true;
 160         }
 161
 162         // Qt 3.2 beta1 returns "xft" for all xft fonts
 163         if (font.rawName() == "xft") {
 164                 if (contains(fromqstr(fi.family()), family)) {
 165                         lyxerr[Debug::FONT] << " got it (Xft) ";
 166                         return true;
 167                 }
 168         }
 169
 170         return false;
 171 }
 172
 173
 174 pair<QFont, bool> const getSymbolFont(string const & family)
 175 {
 176         lyxerr[Debug::FONT] << "Looking for font family "
 177                 << family << " ... ";
 178         string upper = family;
 179         upper[0] = toupper(family[0]);
 180
 181         QFont font;
 182         font.setFamily(toqstr(family));
 183
 184         if (isChosenFont(font, family)) {
 185                 lyxerr[Debug::FONT] << "normal!" << endl;
 186                 return make_pair<QFont, bool>(font, true);
 187         }
 188
 189         font.setFamily(toqstr(upper));
 190
 191         if (isChosenFont(font, upper)) {
 192                 lyxerr[Debug::FONT] << "upper!" << endl;
 193                 return make_pair<QFont, bool>(font, true);
 194         }
 195
 196         // A simple setFamily() fails on Qt 2
 197
 198         font.setRawName(toqstr(getRawName(family)));
 199
 200         if (isChosenFont(font, family)) {
 201                 lyxerr[Debug::FONT] << "raw version!" << endl;
 202                 return make_pair<QFont, bool>(font, true);
 203         }
 204
 205         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 206         return make_pair<QFont, bool>(font, false);
 207 }
 208
 209 } // namespace anon
 210
 211
 212 qfont_loader::qfont_loader()
 213 {
 214         for (int i1 = 0; i1 < LyXFont::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         }
 223 }
 224
 225
 226 qfont_loader::~qfont_loader()
 227 {
 228 }
 229
 230
 231 void qfont_loader::update()
 232 {
 233         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1) {
 234                 for (int i2 = 0; i2 < 2; ++i2) {
 235                         for (int i3 = 0; i3 < 4; ++i3) {
 236                                 for (int i4 = 0; i4 < 10; ++i4) {
 237                                         delete fontinfo_[i1][i2][i3][i4];
 238                                         fontinfo_[i1][i2][i3][i4] = 0;
 239                                 }
 240                         }
 241                 }
 242         }
 243 }
 244
 245
 246 QFont const & qfont_loader::get(LyXFont const & f)
 247 {
 248         return getfontinfo(f)->font;
 249 }
 250
 251
 252 qfont_loader::font_info::font_info(LyXFont const & f)
 253         : metrics(font)
 254 {
 255
 256         string const pat = symbolFamily(f.family());
 257         if (!pat.empty()) {
 258                 bool tmp;
 259                 boost::tie(font, tmp) = getSymbolFont(pat);
 260         } else {
 261                 switch (f.family()) {
 262                 case LyXFont::ROMAN_FAMILY:
 263                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 264                                                     lyxrc.roman_font_foundry)));
 265                         break;
 266                 case LyXFont::SANS_FAMILY:
 267                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 268                                                     lyxrc.sans_font_foundry)));
 269                         break;
 270                 case LyXFont::TYPEWRITER_FAMILY:
 271                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 272                                                     lyxrc.typewriter_font_foundry)));
 273                         break;
 274                 default:
 275                         break;
 276                 }
 277         }
 278
 279         font.setPointSizeFloat(lyxrc.font_sizes[f.size()]
 280                                * lyxrc.zoom / 100.0);
 281
 282         switch (f.series()) {
 283                 case LyXFont::MEDIUM_SERIES:
 284                         font.setWeight(QFont::Normal);
 285                         break;
 286                 case LyXFont::BOLD_SERIES:
 287                         font.setWeight(QFont::Bold);
 288                         break;
 289                 default:
 290                         break;
 291         }
 292
 293         switch (f.realShape()) {
 294                 case LyXFont::ITALIC_SHAPE:
 295                 case LyXFont::SLANTED_SHAPE:
 296                         font.setItalic(true);
 297                         break;
 298                 default:
 299                         break;
 300         }
 301
 302         if (lyxerr.debugging(Debug::FONT)) {
 303                 lyxerr[Debug::FONT] << "Font '" << f.stateText(0)
 304                         << "' matched by\n" << font.rawName() << endl;
 305         }
 306
 307         lyxerr[Debug::FONT] << "The font has size: "
 308                             << font.pointSizeFloat() << endl;
 309
 310         // Is this an exact match?
 311         if (font.exactMatch()) {
 312                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 313         } else {
 314                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 315                                     << endl;
 316         }
 317
 318         lyxerr[Debug::FONT] << "XFLD: " << font.rawName() << endl;
 319
 320         metrics = QFontMetrics(font);
 321 }
 322
 323
 324 qfont_loader::font_info * qfont_loader::getfontinfo(LyXFont const & f)
 325 {
 326         font_info * fi = fontinfo_[f.family()][f.series()][f.realShape()][f.size()];
 327         if (fi)
 328                 return fi;
 329
 330         font_info * fi2 = new font_info(f);
 331         fontinfo_[f.family()][f.series()][f.realShape()][f.size()] = fi2;
 332         return fi2;
 333 }
 334
 335
 336 int qfont_loader::charwidth(LyXFont const & f, Uchar val)
 337 {
 338         font_info * fi = getfontinfo(f);
 339
 340         font_info::WidthCache::const_iterator cit = fi->widthcache.find(val);
 341         if (cit != fi->widthcache.end())
 342                 return cit->second;
 343
 344         int const w = fi->metrics.width(QChar(val));
 345         fi->widthcache[val] = w;
 346         return w;
 347 }
 348
 349
 350 bool qfont_loader::available(LyXFont const & f)
 351 {
 352         if (!lyx_gui::use_gui)
 353                 return false;
 354
 355         static vector<bool> cache_set(LyXFont::NUM_FAMILIES, false);
 356         static vector<bool> cache(LyXFont::NUM_FAMILIES, false);
 357
 358         LyXFont::FONT_FAMILY family = f.family();
 359         if (cache_set[family])
 360                 return cache[family];
 361         cache_set[family] = true;
 362
 363         string const pat = symbolFamily(family);
 364         if (!pat.empty()) {
 365                 pair<QFont, bool> tmp = getSymbolFont(pat);
 366                 if (tmp.second) {
 367                         cache[family] = true;
 368                         return true;
 369                 }
 370
 371                 // If the font is a tex symbol font and it is not available,
 372                 // we try to add the xfonts directory to the font path.
 373                 static bool first_time = true;
 374                 if (!first_time || family == LyXFont::SYMBOL_FAMILY
 375                     || family == LyXFont::WASY_FAMILY)
 376                         return false;
 377
 378                 first_time = false;
 379                 addFontPath();
 380                 tmp = getSymbolFont(pat);
 381                 if (tmp.second) {
 382                         cache[family] = true;
 383                         return true;
 384                 }
 385                 // We don't need to set cache[family] to false, as it
 386                 //is initialized to false;
 387                 return false;
 388         }
 389
 390         // We don't care about non-symbol fonts
 391         return false;
 392 }