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
  15 #include "qfont_loader.h"
  16 #include "qt_helpers.h"
  17 #include "debug.h"
  18 #include "lyxrc.h"
  19 #include "BufferView.h"
  20 #include "qt_helpers.h"
  21
  22 #include <qglobal.h>
  23 #include <qfontmetrics.h>
  24 #include <qfontdatabase.h>
  25 #include <qstringlist.h>
  26 #include "support/lstrings.h"
  27 #include "frontends/lyx_gui.h"
  28
  29 #include <boost/tuple/tuple.hpp>
  30
  31 #ifdef Q_WS_X11
  32 #include <qwidget.h>
  33 #include <X11/Xlib.h>
  34 #include "support/systemcall.h"
  35 #include "support/filetools.h"
  36 #endif
  37
  38 using namespace lyx::support;
  39
  40 using std::endl;
  41 using std::vector;
  42 using std::pair;
  43 using std::make_pair;
  44
  45 namespace {
  46
  47 void addFontPath()
  48 {
  49 #ifdef Q_WS_X11
  50         string const dir =  OnlyPath(LibFileSearch("xfonts", "fonts.dir"));
  51         if (!dir.empty()) {
  52                 QWidget w;
  53                 int n;
  54                 char ** p = XGetFontPath(w.x11Display(), &n);
  55                 if (std::find(p, p + n, dir) != p + n)
  56                         return;
  57                 lyxerr[Debug::FONT] << "Adding " << dir
  58                                     << " to the font path." << endl;
  59                 string const command = "xset fp+ " + dir;
  60                 Systemcall s;
  61                 if (!s.startscript(Systemcall::Wait, command))
  62                         return;
  63                 lyxerr << "Unable to add " << dir << "to the font path."
  64                        << endl;
  65         }
  66 #endif
  67 }
  68
  69
  70 struct symbol_font {
  71         LyXFont::FONT_FAMILY lyx_family;
  72         string family;
  73         string xlfd;
  74 };
  75
  76 symbol_font symbol_fonts[] = {
  77         { LyXFont::SYMBOL_FAMILY,
  78                 "symbol",
  79                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  80
  81         { LyXFont::CMR_FAMILY,
  82                 "cmr10",
  83                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  84
  85         { LyXFont::CMSY_FAMILY,
  86                 "cmsy10",
  87                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  88
  89         { LyXFont::CMM_FAMILY,
  90                 "cmmi10",
  91                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  92
  93         { LyXFont::CMEX_FAMILY,
  94                 "cmex10",
  95                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  96
  97         { LyXFont::MSA_FAMILY,
  98                 "msam10",
  99                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
 100
 101         { LyXFont::MSB_FAMILY,
 102                 "msbm10",
 103                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
 104
 105         { LyXFont::EUFRAK_FAMILY,
 106                 "eufm10",
 107                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 108
 109         { LyXFont::WASY_FAMILY,
 110                 "wasy10",
 111                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" }
 112 };
 113
 114 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
 115
 116
 117 string getRawName(string const & family)
 118 {
 119         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 120                 if (family == symbol_fonts[i].family)
 121                         return symbol_fonts[i].xlfd;
 122         }
 123         lyxerr[Debug::FONT] << "BUG: family not found !" << endl;
 124         return string();
 125 }
 126
 127
 128 string const symbolFamily(LyXFont::FONT_FAMILY family)
 129 {
 130         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 131                 if (family == symbol_fonts[i].lyx_family)
 132                         return symbol_fonts[i].family;
 133         }
 134         return string();
 135 }
 136
 137
 138 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 139 {
 140         return family >= LyXFont::SYMBOL_FAMILY &&
 141                 family <= LyXFont::WASY_FAMILY;
 142 }
 143
 144
 145 bool isChosenFont(QFont & font, string const & family)
 146 {
 147         lyxerr[Debug::FONT] << "raw: " << fromqstr(font.rawName()) << endl;
 148
 149         QFontInfo fi(font);
 150
 151         // Note Qt lies about family quite often
 152         lyxerr[Debug::FONT] << "alleged fi family: "
 153                 << fromqstr(fi.family()) << endl;
 154
 155         // So we check rawName first
 156         if (contains(fromqstr(font.rawName()), family)) {
 157                 lyxerr[Debug::FONT] << " got it ";
 158                 return true;
 159         }
 160
 161         // Qt 3.2 beta1 returns "xft" for all xft fonts
 162         if (font.rawName() == "xft") {
 163                 if (contains(fromqstr(fi.family()), family)) {
 164                         lyxerr[Debug::FONT] << " got it (Xft) ";
 165                         return true;
 166                 }
 167         }
 168
 169         return false;
 170 }
 171
 172
 173 pair<QFont, bool> const getSymbolFont(string const & family)
 174 {
 175         lyxerr[Debug::FONT] << "Looking for font family "
 176                 << family << " ... ";
 177         string upper = family;
 178         upper[0] = toupper(family[0]);
 179
 180         QFont font;
 181         font.setFamily(toqstr(family));
 182
 183         if (isChosenFont(font, family)) {
 184                 lyxerr[Debug::FONT] << "normal!" << endl;
 185                 return make_pair<QFont, bool>(font, true);
 186         }
 187
 188         font.setFamily(toqstr(upper));
 189
 190         if (isChosenFont(font, upper)) {
 191                 lyxerr[Debug::FONT] << "upper!" << endl;
 192                 return make_pair<QFont, bool>(font, true);
 193         }
 194
 195         // A simple setFamily() fails on Qt 2
 196
 197         font.setRawName(toqstr(getRawName(family)));
 198
 199         if (isChosenFont(font, family)) {
 200                 lyxerr[Debug::FONT] << "raw version!" << endl;
 201                 return make_pair<QFont, bool>(font, true);
 202         }
 203
 204         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 205         return make_pair<QFont, bool>(font, false);
 206 }
 207
 208 } // namespace anon
 209
 210
 211 qfont_loader::qfont_loader()
 212 {
 213         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1) {
 214                 for (int i2 = 0; i2 < 2; ++i2) {
 215                         for (int i3 = 0; i3 < 4; ++i3) {
 216                                 for (int i4 = 0; i4 < 10; ++i4) {
 217                                         fontinfo_[i1][i2][i3][i4] = 0;
 218                                 }
 219                         }
 220                 }
 221         }
 222 }
 223
 224
 225 qfont_loader::~qfont_loader()
 226 {
 227 }
 228
 229
 230 void qfont_loader::update()
 231 {
 232         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1) {
 233                 for (int i2 = 0; i2 < 2; ++i2) {
 234                         for (int i3 = 0; i3 < 4; ++i3) {
 235                                 for (int i4 = 0; i4 < 10; ++i4) {
 236                                         delete fontinfo_[i1][i2][i3][i4];
 237                                         fontinfo_[i1][i2][i3][i4] = 0;
 238                                 }
 239                         }
 240                 }
 241         }
 242 }
 243
 244
 245 QFont const & qfont_loader::get(LyXFont const & f)
 246 {
 247         return getfontinfo(f)->font;
 248 }
 249
 250
 251 qfont_loader::font_info::font_info(LyXFont const & f)
 252         : metrics(font)
 253 {
 254
 255         string const pat = symbolFamily(f.family());
 256         if (!pat.empty()) {
 257                 bool tmp;
 258                 boost::tie(font, tmp) = getSymbolFont(pat);
 259         } else {
 260                 switch (f.family()) {
 261                 case LyXFont::ROMAN_FAMILY:
 262                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 263                                                     lyxrc.roman_font_foundry)));
 264                         break;
 265                 case LyXFont::SANS_FAMILY:
 266                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 267                                                     lyxrc.sans_font_foundry)));
 268                         break;
 269                 case LyXFont::TYPEWRITER_FAMILY:
 270                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 271                                                     lyxrc.typewriter_font_foundry)));
 272                         break;
 273                 default:
 274                         break;
 275                 }
 276         }
 277
 278         font.setPointSizeFloat(lyxrc.font_sizes[f.size()]
 279                                * lyxrc.zoom / 100.0);
 280
 281         switch (f.series()) {
 282                 case LyXFont::MEDIUM_SERIES:
 283                         font.setWeight(QFont::Normal);
 284                         break;
 285                 case LyXFont::BOLD_SERIES:
 286                         font.setWeight(QFont::Bold);
 287                         break;
 288                 default:
 289                         break;
 290         }
 291
 292         switch (f.realShape()) {
 293                 case LyXFont::ITALIC_SHAPE:
 294                 case LyXFont::SLANTED_SHAPE:
 295                         font.setItalic(true);
 296                         break;
 297                 default:
 298                         break;
 299         }
 300
 301         if (lyxerr.debugging(Debug::FONT)) {
 302                 lyxerr[Debug::FONT] << "Font '" << f.stateText(0)
 303                         << "' matched by\n" << font.rawName() << endl;
 304         }
 305
 306         lyxerr[Debug::FONT] << "The font has size: "
 307                             << font.pointSizeFloat() << endl;
 308
 309         // Is this an exact match?
 310         if (font.exactMatch()) {
 311                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 312         } else {
 313                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 314                                     << endl;
 315         }
 316
 317         lyxerr[Debug::FONT] << "XFLD: " << font.rawName() << endl;
 318
 319         metrics = QFontMetrics(font);
 320 }
 321
 322
 323 qfont_loader::font_info * qfont_loader::getfontinfo(LyXFont const & f)
 324 {
 325         font_info * fi = fontinfo_[f.family()][f.series()][f.realShape()][f.size()];
 326         if (fi)
 327                 return fi;
 328
 329         font_info * fi2 = new font_info(f);
 330         fontinfo_[f.family()][f.series()][f.realShape()][f.size()] = fi2;
 331         return fi2;
 332 }
 333
 334
 335 int qfont_loader::charwidth(LyXFont const & f, Uchar val)
 336 {
 337         font_info * fi = getfontinfo(f);
 338
 339         font_info::WidthCache::const_iterator cit = fi->widthcache.find(val);
 340         if (cit != fi->widthcache.end())
 341                 return cit->second;
 342
 343         int const w = fi->metrics.width(QChar(val));
 344         fi->widthcache[val] = w;
 345         return w;
 346 }
 347
 348
 349 bool qfont_loader::available(LyXFont const & f)
 350 {
 351         if (!lyx_gui::use_gui)
 352                 return false;
 353
 354         static vector<bool> cache_set(LyXFont::NUM_FAMILIES, false);
 355         static vector<bool> cache(LyXFont::NUM_FAMILIES, false);
 356
 357         LyXFont::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                 pair<QFont, bool> tmp = getSymbolFont(pat);
 365                 if (tmp.second) {
 366                         cache[family] = true;
 367                         return true;
 368                 }
 369
 370                 // If the font is a tex symbol font and it is not available,
 371                 // we try to add the xfonts directory to the font path.
 372                 static bool first_time = true;
 373                 if (!first_time || family == LyXFont::SYMBOL_FAMILY
 374                     || family == LyXFont::WASY_FAMILY)
 375                         return false;
 376
 377                 first_time = false;
 378                 addFontPath();
 379                 tmp = getSymbolFont(pat);
 380                 if (tmp.second) {
 381                         cache[family] = true;
 382                         return true;
 383                 }
 384                 // We don't need to set cache[family] to false, as it
 385                 //is initialized to false;
 386                 return false;
 387         }
 388
 389         // We don't care about non-symbol fonts
 390         return false;
 391 }