src/frontends/qt4/qfont_loader.C

   1 /**
   2  * \file FontLoader.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/convert.h"
  23 #include "support/filetools.h"
  24 #include "support/lstrings.h"
  25 #include "support/systemcall.h"
  26
  27 #include <qfontinfo.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 <algorithm>
  35 #endif
  36
  37 using lyx::support::contains;
  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 #ifdef Q_WS_MACX
  47 #include <ApplicationServices/ApplicationServices.h>
  48 #endif
  49
  50
  51 void FontLoader::initFontPath()
  52 {
  53 #ifdef Q_WS_MACX
  54         CFBundleRef  myAppBundle = CFBundleGetMainBundle();
  55         CFURLRef  myAppResourcesURL, FontsURL;
  56         FSRef  fontDirRef;
  57         FSSpec  fontDirSpec;
  58         CFStringRef  filePath = CFStringCreateWithBytes(kCFAllocatorDefault,
  59                                         (UInt8 *) "Fonts", strlen("Fonts"),
  60                                         kCFStringEncodingISOLatin1, false);
  61
  62         myAppResourcesURL = CFBundleCopyResourcesDirectoryURL(myAppBundle);
  63         FontsURL = CFURLCreateCopyAppendingPathComponent(kCFAllocatorDefault,
  64                         myAppResourcesURL, filePath, true);
  65         if (lyxerr.debugging(Debug::FONT)) {
  66                 UInt8  buf[255];
  67                 if (CFURLGetFileSystemRepresentation(FontsURL, true, buf, 255))
  68                         lyxerr << "Adding Fonts directory: " << buf << endl;
  69         }
  70         CFURLGetFSRef (FontsURL, &fontDirRef);
  71         OSStatus err = FSGetCatalogInfo (&fontDirRef, kFSCatInfoNone,
  72                                          NULL, NULL, &fontDirSpec, NULL);
  73         if (err)
  74                 lyxerr << "FSGetCatalogInfo err = " << err << endl;
  75         err = FMActivateFonts (&fontDirSpec, NULL, NULL,
  76                                kFMLocalActivationContext);
  77         if (err)
  78                 lyxerr << "FMActivateFonts err = " << err << endl;
  79 #endif
  80 }
  81
  82 namespace {
  83
  84 struct symbol_font {
  85         LyXFont::FONT_FAMILY lyx_family;
  86         string family;
  87         string xlfd;
  88 };
  89
  90 symbol_font symbol_fonts[] = {
  91         { LyXFont::SYMBOL_FAMILY,
  92                 "symbol",
  93                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  94
  95         { LyXFont::CMR_FAMILY,
  96                 "cmr10",
  97                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  98
  99         { LyXFont::CMSY_FAMILY,
 100                 "cmsy10",
 101                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
 102
 103         { LyXFont::CMM_FAMILY,
 104                 "cmmi10",
 105                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 106
 107         { LyXFont::CMEX_FAMILY,
 108                 "cmex10",
 109                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
 110
 111         { LyXFont::MSA_FAMILY,
 112                 "msam10",
 113                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
 114
 115         { LyXFont::MSB_FAMILY,
 116                 "msbm10",
 117                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
 118
 119         { LyXFont::EUFRAK_FAMILY,
 120                 "eufm10",
 121                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
 122
 123         { LyXFont::WASY_FAMILY,
 124                 "wasy10",
 125                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" }
 126 };
 127
 128 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
 129
 130
 131 string getRawName(string const & family)
 132 {
 133         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 134                 if (family == symbol_fonts[i].family)
 135                         return symbol_fonts[i].xlfd;
 136
 137         lyxerr[Debug::FONT] << "BUG: family not found !" << endl;
 138         return string();
 139 }
 140
 141
 142 string const symbolFamily(LyXFont::FONT_FAMILY family)
 143 {
 144         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 145                 if (family == symbol_fonts[i].lyx_family)
 146                         return symbol_fonts[i].family;
 147         }
 148         return string();
 149 }
 150
 151
 152 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 153 {
 154         return family >= LyXFont::SYMBOL_FAMILY &&
 155                 family <= LyXFont::WASY_FAMILY;
 156 }
 157
 158
 159 bool isChosenFont(QFont & font, string const & family)
 160 {
 161         lyxerr[Debug::FONT] << "raw: " << fromqstr(font.rawName()) << endl;
 162
 163         QFontInfo fi(font);
 164
 165         // Note Qt lies about family quite often
 166         lyxerr[Debug::FONT] << "alleged fi family: "
 167                 << fromqstr(fi.family()) << endl;
 168
 169         // So we check rawName first
 170         if (contains(fromqstr(font.rawName()), family)) {
 171                 lyxerr[Debug::FONT] << " got it ";
 172                 return true;
 173         }
 174
 175         // Qt 3.2 beta1 returns "xft" for all xft fonts
 176         // Qt 4.1 returns "Multi" for all ? xft fonts
 177         if (font.rawName() == "xft" || font.rawName() == "Multi") {
 178                 if (contains(fromqstr(fi.family()), family)) {
 179                         lyxerr[Debug::FONT] << " got it (Xft) ";
 180                         return true;
 181                 }
 182         }
 183
 184         return false;
 185 }
 186
 187
 188 pair<QFont, bool> const getSymbolFont(string const & family)
 189 {
 190         lyxerr[Debug::FONT] << "Looking for font family "
 191                 << family << " ... ";
 192         string upper = family;
 193         upper[0] = toupper(family[0]);
 194
 195         QFont font;
 196         font.setFamily(toqstr(family));
 197
 198         if (isChosenFont(font, family)) {
 199                 lyxerr[Debug::FONT] << "normal!" << endl;
 200                 return make_pair<QFont, bool>(font, true);
 201         }
 202
 203         font.setFamily(toqstr(upper));
 204
 205         if (isChosenFont(font, upper)) {
 206                 lyxerr[Debug::FONT] << "upper!" << endl;
 207                 return make_pair<QFont, bool>(font, true);
 208         }
 209
 210         // A simple setFamily() fails on Qt 2
 211
 212         font.setRawName(toqstr(getRawName(family)));
 213
 214         if (isChosenFont(font, family)) {
 215                 lyxerr[Debug::FONT] << "raw version!" << endl;
 216                 return make_pair<QFont, bool>(font, true);
 217         }
 218
 219         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 220         return make_pair<QFont, bool>(font, false);
 221 }
 222
 223 } // namespace anon
 224
 225
 226 FontLoader::FontLoader()
 227 {
 228         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 229                 for (int i2 = 0; i2 < 2; ++i2)
 230                         for (int i3 = 0; i3 < 4; ++i3)
 231                                 for (int i4 = 0; i4 < 10; ++i4)
 232                                         fontinfo_[i1][i2][i3][i4] = 0;
 233 }
 234
 235
 236 void FontLoader::update()
 237 {
 238         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 239                 for (int i2 = 0; i2 < 2; ++i2)
 240                         for (int i3 = 0; i3 < 4; ++i3)
 241                                 for (int i4 = 0; i4 < 10; ++i4) {
 242                                         delete fontinfo_[i1][i2][i3][i4];
 243                                         fontinfo_[i1][i2][i3][i4] = 0;
 244                                 }
 245 }
 246
 247
 248 /////////////////////////////////////////////////
 249
 250
 251 QLFontInfo::QLFontInfo(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(convert<double>(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" << (const char *) 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         lyxerr[Debug::FONT] << "XFLD: " << (const char *) font.rawName() << endl;
 317
 318         metrics = QFontMetrics(font);
 319 }
 320
 321
 322 int QLFontInfo::width(Uchar val) const
 323 {
 324 // Starting with version 3.1.0, Qt/X11 does its own caching of
 325 // character width, so it is not necessary to provide ours.
 326 #if defined (USE_LYX_FONTCACHE)
 327         QLFontInfo::WidthCache::const_iterator cit = widthcache.find(val);
 328         if (cit != widthcache.end())
 329                 return cit->second;
 330
 331         int const w = metrics.width(QChar(val));
 332         widthcache[val] = w;
 333         return w;
 334 #else
 335         return metrics.width(QChar(val));
 336 #endif
 337 }
 338
 339
 340 bool FontLoader::available(LyXFont const & f)
 341 {
 342         if (!lyx_gui::use_gui)
 343                 return false;
 344
 345         static vector<int> cache_set(LyXFont::NUM_FAMILIES, false);
 346         static vector<int> cache(LyXFont::NUM_FAMILIES, false);
 347
 348         LyXFont::FONT_FAMILY family = f.family();
 349         if (cache_set[family])
 350                 return cache[family];
 351         cache_set[family] = true;
 352
 353         string const pat = symbolFamily(family);
 354         if (pat.empty())
 355                 // We don't care about non-symbol fonts
 356                 return false;
 357
 358         pair<QFont, bool> tmp = getSymbolFont(pat);
 359         if (!tmp.second)
 360                 return false;
 361
 362         cache[family] = true;
 363         return true;
 364 }