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 "qfont_loader.h"
  15 #include "qt_helpers.h"
  16
  17 #include "debug.h"
  18 #include "lyxrc.h"
  19
  20 #include "frontends/lyx_gui.h"
  21
  22 #include "support/filetools.h"
  23 #include "support/lstrings.h"
  24 #include "support/systemcall.h"
  25
  26 #include <qfontinfo.h>
  27
  28 #include <boost/tuple/tuple.hpp>
  29
  30 #ifdef Q_WS_X11
  31 #include <qwidget.h>
  32 #include <X11/Xlib.h>
  33 #include <algorithm>
  34 #endif
  35
  36 using lyx::support::contains;
  37 using lyx::support::LibFileSearch;
  38 using lyx::support::OnlyPath;
  39 using lyx::support::QuoteName;
  40 using lyx::support::Systemcall;
  41
  42 using std::endl;
  43 using std::make_pair;
  44
  45 using std::pair;
  46 using std::vector;
  47 using std::string;
  48
  49 #ifdef Q_WS_MACX
  50 #include <ApplicationServices/ApplicationServices.h>
  51 #endif
  52
  53 namespace {
  54
  55 void addFontPath()
  56 {
  57 #ifdef Q_WS_X11
  58         string const dir =  OnlyPath(LibFileSearch("xfonts", "fonts.dir"));
  59         if (!dir.empty()) {
  60                 QWidget w;
  61                 int n;
  62                 char ** p = XGetFontPath(w.x11Display(), &n);
  63                 if (std::find(p, p + n, dir) != p + n)
  64                         return;
  65                 lyxerr[Debug::FONT] << "Adding " << dir
  66                                     << " to the font path." << endl;
  67                 string const command = "xset fp+ " + QuoteName(dir);
  68                 Systemcall s;
  69                 if (!s.startscript(Systemcall::Wait, command))
  70                         return;
  71                 lyxerr << "Unable to add " << dir << "to the font path."
  72                        << endl;
  73         }
  74 #endif
  75 #ifdef Q_WS_MACX
  76         CFBundleRef  myAppBundle = CFBundleGetMainBundle();
  77         CFURLRef  myAppResourcesURL, FontsURL;
  78         FSRef  fontDirRef;
  79         FSSpec  fontDirSpec;
  80         CFStringRef  filePath = CFStringCreateWithBytes(kCFAllocatorDefault,
  81                                         (UInt8 *) "Fonts", strlen("Fonts"),
  82                                         kCFStringEncodingISOLatin1, false);
  83
  84         myAppResourcesURL = CFBundleCopyResourcesDirectoryURL(myAppBundle);
  85         FontsURL = CFURLCreateCopyAppendingPathComponent(kCFAllocatorDefault,
  86                         myAppResourcesURL, filePath, true);
  87         if (lyxerr.debugging(Debug::FONT)) {
  88                 UInt8  buf[255];
  89                 if (CFURLGetFileSystemRepresentation(FontsURL, true, buf, 255))
  90                         lyxerr << "Adding Fonts directory: " << buf << endl;
  91         }
  92         CFURLGetFSRef (FontsURL, &fontDirRef);
  93         OSStatus err = FSGetCatalogInfo (&fontDirRef, kFSCatInfoNone,
  94                                          NULL, NULL, &fontDirSpec, NULL);
  95         if (err)
  96                 lyxerr << "FSGetCatalogInfo err = " << err << endl;
  97         err = FMActivateFonts (&fontDirSpec, NULL, NULL,
  98                                kFMLocalActivationContext);
  99         if (err)
 100                 lyxerr << "FMActivateFonts err = " << err << endl;
 101 #endif
 102 }
 103
 104
 105 struct symbol_font {
 106         LyXFont::FONT_FAMILY lyx_family;
 107         string family;
 108         string xlfd;
 109 };
 110
 111 symbol_font symbol_fonts[] = {
 112         { LyXFont::SYMBOL_FAMILY,
 113                 "symbol",
 114                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
 115
 116         { LyXFont::CMR_FAMILY,
 117                 "cmr10",
 118                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 119
 120         { LyXFont::CMSY_FAMILY,
 121                 "cmsy10",
 122                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
 123
 124         { LyXFont::CMM_FAMILY,
 125                 "cmmi10",
 126                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 127
 128         { LyXFont::CMEX_FAMILY,
 129                 "cmex10",
 130                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
 131
 132         { LyXFont::MSA_FAMILY,
 133                 "msam10",
 134                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
 135
 136         { LyXFont::MSB_FAMILY,
 137                 "msbm10",
 138                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
 139
 140         { LyXFont::EUFRAK_FAMILY,
 141                 "eufm10",
 142                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 143
 144         { LyXFont::WASY_FAMILY,
 145                 "wasy10",
 146                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" }
 147 };
 148
 149 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
 150
 151
 152 string getRawName(string const & family)
 153 {
 154         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 155                 if (family == symbol_fonts[i].family)
 156                         return symbol_fonts[i].xlfd;
 157         }
 158         lyxerr[Debug::FONT] << "BUG: family not found !" << endl;
 159         return string();
 160 }
 161
 162
 163 string const symbolFamily(LyXFont::FONT_FAMILY family)
 164 {
 165         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 166                 if (family == symbol_fonts[i].lyx_family)
 167                         return symbol_fonts[i].family;
 168         }
 169         return string();
 170 }
 171
 172
 173 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 174 {
 175         return family >= LyXFont::SYMBOL_FAMILY &&
 176                 family <= LyXFont::WASY_FAMILY;
 177 }
 178
 179
 180 bool isChosenFont(QFont & font, string const & family)
 181 {
 182         lyxerr[Debug::FONT] << "raw: " << fromqstr(font.rawName()) << endl;
 183
 184         QFontInfo fi(font);
 185
 186         // Note Qt lies about family quite often
 187         lyxerr[Debug::FONT] << "alleged fi family: "
 188                 << fromqstr(fi.family()) << endl;
 189
 190         // So we check rawName first
 191         if (contains(fromqstr(font.rawName()), family)) {
 192                 lyxerr[Debug::FONT] << " got it ";
 193                 return true;
 194         }
 195
 196         // Qt 3.2 beta1 returns "xft" for all xft fonts
 197         if (font.rawName() == "xft") {
 198                 if (contains(fromqstr(fi.family()), family)) {
 199                         lyxerr[Debug::FONT] << " got it (Xft) ";
 200                         return true;
 201                 }
 202         }
 203
 204         return false;
 205 }
 206
 207
 208 pair<QFont, bool> const getSymbolFont(string const & family)
 209 {
 210         lyxerr[Debug::FONT] << "Looking for font family "
 211                 << family << " ... ";
 212         string upper = family;
 213         upper[0] = toupper(family[0]);
 214
 215         QFont font;
 216         font.setFamily(toqstr(family));
 217
 218         if (isChosenFont(font, family)) {
 219                 lyxerr[Debug::FONT] << "normal!" << endl;
 220                 return make_pair<QFont, bool>(font, true);
 221         }
 222
 223         font.setFamily(toqstr(upper));
 224
 225         if (isChosenFont(font, upper)) {
 226                 lyxerr[Debug::FONT] << "upper!" << endl;
 227                 return make_pair<QFont, bool>(font, true);
 228         }
 229
 230         // A simple setFamily() fails on Qt 2
 231
 232         font.setRawName(toqstr(getRawName(family)));
 233
 234         if (isChosenFont(font, family)) {
 235                 lyxerr[Debug::FONT] << "raw version!" << endl;
 236                 return make_pair<QFont, bool>(font, true);
 237         }
 238
 239         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 240         return make_pair<QFont, bool>(font, false);
 241 }
 242
 243 } // namespace anon
 244
 245
 246 qfont_loader::qfont_loader()
 247 {
 248         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1) {
 249                 for (int i2 = 0; i2 < 2; ++i2) {
 250                         for (int i3 = 0; i3 < 4; ++i3) {
 251                                 for (int i4 = 0; i4 < 10; ++i4) {
 252                                         fontinfo_[i1][i2][i3][i4] = 0;
 253                                 }
 254                         }
 255                 }
 256         }
 257 }
 258
 259
 260 qfont_loader::~qfont_loader()
 261 {
 262 }
 263
 264
 265 void qfont_loader::update()
 266 {
 267         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1) {
 268                 for (int i2 = 0; i2 < 2; ++i2) {
 269                         for (int i3 = 0; i3 < 4; ++i3) {
 270                                 for (int i4 = 0; i4 < 10; ++i4) {
 271                                         delete fontinfo_[i1][i2][i3][i4];
 272                                         fontinfo_[i1][i2][i3][i4] = 0;
 273                                 }
 274                         }
 275                 }
 276         }
 277 }
 278
 279
 280 QFont const & qfont_loader::get(LyXFont const & f)
 281 {
 282         return getfontinfo(f)->font;
 283 }
 284
 285
 286 qfont_loader::font_info::font_info(LyXFont const & f)
 287         : metrics(font)
 288 {
 289
 290         string const pat = symbolFamily(f.family());
 291         if (!pat.empty()) {
 292                 bool tmp;
 293                 boost::tie(font, tmp) = getSymbolFont(pat);
 294         } else {
 295                 switch (f.family()) {
 296                 case LyXFont::ROMAN_FAMILY:
 297                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 298                                                     lyxrc.roman_font_foundry)));
 299                         break;
 300                 case LyXFont::SANS_FAMILY:
 301                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 302                                                     lyxrc.sans_font_foundry)));
 303                         break;
 304                 case LyXFont::TYPEWRITER_FAMILY:
 305                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 306                                                     lyxrc.typewriter_font_foundry)));
 307                         break;
 308                 default:
 309                         break;
 310                 }
 311         }
 312
 313         font.setPointSizeFloat(lyxrc.font_sizes[f.size()]
 314                                * lyxrc.zoom / 100.0);
 315
 316         switch (f.series()) {
 317                 case LyXFont::MEDIUM_SERIES:
 318                         font.setWeight(QFont::Normal);
 319                         break;
 320                 case LyXFont::BOLD_SERIES:
 321                         font.setWeight(QFont::Bold);
 322                         break;
 323                 default:
 324                         break;
 325         }
 326
 327         switch (f.realShape()) {
 328                 case LyXFont::ITALIC_SHAPE:
 329                 case LyXFont::SLANTED_SHAPE:
 330                         font.setItalic(true);
 331                         break;
 332                 default:
 333                         break;
 334         }
 335
 336         if (lyxerr.debugging(Debug::FONT)) {
 337                 lyxerr[Debug::FONT] << "Font '" << f.stateText(0)
 338                         << "' matched by\n" << font.rawName() << endl;
 339         }
 340
 341         lyxerr[Debug::FONT] << "The font has size: "
 342                             << font.pointSizeFloat() << endl;
 343
 344         // Is this an exact match?
 345         if (font.exactMatch()) {
 346                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 347         } else {
 348                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 349                                     << endl;
 350         }
 351
 352         lyxerr[Debug::FONT] << "XFLD: " << font.rawName() << endl;
 353
 354         metrics = QFontMetrics(font);
 355 }
 356
 357
 358 qfont_loader::font_info * qfont_loader::getfontinfo(LyXFont const & f)
 359 {
 360         font_info * fi = fontinfo_[f.family()][f.series()][f.realShape()][f.size()];
 361         if (fi)
 362                 return fi;
 363
 364         font_info * fi2 = new font_info(f);
 365         fontinfo_[f.family()][f.series()][f.realShape()][f.size()] = fi2;
 366         return fi2;
 367 }
 368
 369
 370 int qfont_loader::charwidth(LyXFont const & f, Uchar val)
 371 {
 372         font_info * fi = getfontinfo(f);
 373
 374         font_info::WidthCache::const_iterator cit = fi->widthcache.find(val);
 375         if (cit != fi->widthcache.end())
 376                 return cit->second;
 377
 378         int const w = fi->metrics.width(QChar(val));
 379         fi->widthcache[val] = w;
 380         return w;
 381 }
 382
 383
 384 bool qfont_loader::available(LyXFont const & f)
 385 {
 386         if (!lyx_gui::use_gui)
 387                 return false;
 388 #ifdef Q_WS_MACX
 389         static bool need_bundle_fonts = true;
 390         if (need_bundle_fonts) {
 391                 addFontPath();
 392                 need_bundle_fonts = false;
 393         }
 394 #endif
 395
 396         static vector<bool> cache_set(LyXFont::NUM_FAMILIES, false);
 397         static vector<bool> cache(LyXFont::NUM_FAMILIES, false);
 398
 399         LyXFont::FONT_FAMILY family = f.family();
 400         if (cache_set[family])
 401                 return cache[family];
 402         cache_set[family] = true;
 403
 404         string const pat = symbolFamily(family);
 405         if (!pat.empty()) {
 406                 pair<QFont, bool> tmp = getSymbolFont(pat);
 407                 if (tmp.second) {
 408                         cache[family] = true;
 409                         return true;
 410                 }
 411
 412                 // If the font is a tex symbol font and it is not available,
 413                 // we try to add the xfonts directory to the font path.
 414                 static bool first_time = true;
 415                 if (!first_time || family == LyXFont::SYMBOL_FAMILY
 416                     || family == LyXFont::WASY_FAMILY)
 417                         return false;
 418
 419                 first_time = false;
 420                 addFontPath();
 421                 tmp = getSymbolFont(pat);
 422                 if (tmp.second) {
 423                         cache[family] = true;
 424                         return true;
 425                 }
 426                 // We don't need to set cache[family] to false, as it
 427                 //is initialized to false;
 428                 return false;
 429         }
 430
 431         // We don't care about non-symbol fonts
 432         return false;
 433 }