src/frontends/qt4/GuiFontLoader.C

   1 /**
   2  * \file GuiFontLoader.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 "GuiFontLoader.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
  47 namespace lyx {
  48 namespace frontend {
  49
  50 GuiFontLoader::~GuiFontLoader() {
  51 }
  52
  53 namespace {
  54
  55 struct symbol_font {
  56         LyXFont::FONT_FAMILY lyx_family;
  57         string family;
  58         string xlfd;
  59 };
  60
  61 symbol_font symbol_fonts[] = {
  62         { LyXFont::SYMBOL_FAMILY,
  63                 "symbol",
  64                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  65
  66         { LyXFont::CMR_FAMILY,
  67                 "cmr10",
  68                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  69
  70         { LyXFont::CMSY_FAMILY,
  71                 "cmsy10",
  72                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  73
  74         { LyXFont::CMM_FAMILY,
  75                 "cmmi10",
  76                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  77
  78         { LyXFont::CMEX_FAMILY,
  79                 "cmex10",
  80                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  81
  82         { LyXFont::MSA_FAMILY,
  83                 "msam10",
  84                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
  85
  86         { LyXFont::MSB_FAMILY,
  87                 "msbm10",
  88                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
  89
  90         { LyXFont::EUFRAK_FAMILY,
  91                 "eufm10",
  92                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  93
  94         { LyXFont::WASY_FAMILY,
  95                 "wasy10",
  96                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" }
  97 };
  98
  99 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
 100
 101
 102 string getRawName(string const & family)
 103 {
 104         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 105                 if (family == symbol_fonts[i].family)
 106                         return symbol_fonts[i].xlfd;
 107
 108         lyxerr[Debug::FONT] << "BUG: family not found !" << endl;
 109         return string();
 110 }
 111
 112
 113 string const symbolFamily(LyXFont::FONT_FAMILY family)
 114 {
 115         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 116                 if (family == symbol_fonts[i].lyx_family)
 117                         return symbol_fonts[i].family;
 118         }
 119         return string();
 120 }
 121
 122
 123 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 124 {
 125         return family >= LyXFont::SYMBOL_FAMILY &&
 126                 family <= LyXFont::WASY_FAMILY;
 127 }
 128
 129
 130 bool isChosenFont(QFont & font, string const & family)
 131 {
 132         lyxerr[Debug::FONT] << "raw: " << fromqstr(font.rawName()) << endl;
 133
 134         QFontInfo fi(font);
 135
 136         // Note Qt lies about family quite often
 137         lyxerr[Debug::FONT] << "alleged fi family: "
 138                 << fromqstr(fi.family()) << endl;
 139
 140         // So we check rawName first
 141         if (contains(fromqstr(font.rawName()), family)) {
 142                 lyxerr[Debug::FONT] << " got it ";
 143                 return true;
 144         }
 145
 146         // Qt 3.2 beta1 returns "xft" for all xft fonts
 147         // Qt 4.1 returns "Multi" for all ? xft fonts
 148         if (font.rawName() == "xft" || font.rawName() == "Multi") {
 149                 if (contains(fromqstr(fi.family()), family)) {
 150                         lyxerr[Debug::FONT] << " got it (Xft) ";
 151                         return true;
 152                 }
 153         }
 154
 155         return false;
 156 }
 157
 158
 159 pair<QFont, bool> const getSymbolFont(string const & family)
 160 {
 161         lyxerr[Debug::FONT] << "Looking for font family "
 162                 << family << " ... ";
 163         string upper = family;
 164         upper[0] = toupper(family[0]);
 165
 166         QFont font;
 167         font.setFamily(toqstr(family));
 168
 169         if (isChosenFont(font, family)) {
 170                 lyxerr[Debug::FONT] << "normal!" << endl;
 171                 return make_pair<QFont, bool>(font, true);
 172         }
 173
 174         font.setFamily(toqstr(upper));
 175
 176         if (isChosenFont(font, upper)) {
 177                 lyxerr[Debug::FONT] << "upper!" << endl;
 178                 return make_pair<QFont, bool>(font, true);
 179         }
 180
 181         // A simple setFamily() fails on Qt 2
 182
 183         font.setRawName(toqstr(getRawName(family)));
 184
 185         if (isChosenFont(font, family)) {
 186                 lyxerr[Debug::FONT] << "raw version!" << endl;
 187                 return make_pair<QFont, bool>(font, true);
 188         }
 189
 190         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 191         return make_pair<QFont, bool>(font, false);
 192 }
 193
 194 } // namespace anon
 195
 196
 197 GuiFontLoader::GuiFontLoader()
 198 {
 199         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 200                 for (int i2 = 0; i2 < 2; ++i2)
 201                         for (int i3 = 0; i3 < 4; ++i3)
 202                                 for (int i4 = 0; i4 < 10; ++i4)
 203                                         fontinfo_[i1][i2][i3][i4] = 0;
 204 }
 205
 206
 207 void GuiFontLoader::update()
 208 {
 209         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 210                 for (int i2 = 0; i2 < 2; ++i2)
 211                         for (int i3 = 0; i3 < 4; ++i3)
 212                                 for (int i4 = 0; i4 < 10; ++i4) {
 213                                         delete fontinfo_[i1][i2][i3][i4];
 214                                         fontinfo_[i1][i2][i3][i4] = 0;
 215                                 }
 216 }
 217
 218
 219 /////////////////////////////////////////////////
 220
 221
 222 QLFontInfo::QLFontInfo(LyXFont const & f)
 223         : metrics(font)
 224 {
 225
 226         string const pat = symbolFamily(f.family());
 227         if (!pat.empty()) {
 228                 bool tmp;
 229                 boost::tie(font, tmp) = getSymbolFont(pat);
 230         } else {
 231                 switch (f.family()) {
 232                 case LyXFont::ROMAN_FAMILY:
 233                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 234                                                     lyxrc.roman_font_foundry)));
 235                         break;
 236                 case LyXFont::SANS_FAMILY:
 237                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 238                                                     lyxrc.sans_font_foundry)));
 239                         break;
 240                 case LyXFont::TYPEWRITER_FAMILY:
 241                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 242                                                     lyxrc.typewriter_font_foundry)));
 243                         break;
 244                 default:
 245                         break;
 246                 }
 247         }
 248
 249         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 250                                * lyxrc.zoom / 100.0);
 251
 252         switch (f.series()) {
 253                 case LyXFont::MEDIUM_SERIES:
 254                         font.setWeight(QFont::Normal);
 255                         break;
 256                 case LyXFont::BOLD_SERIES:
 257                         font.setWeight(QFont::Bold);
 258                         break;
 259                 default:
 260                         break;
 261         }
 262
 263         switch (f.realShape()) {
 264                 case LyXFont::ITALIC_SHAPE:
 265                 case LyXFont::SLANTED_SHAPE:
 266                         font.setItalic(true);
 267                         break;
 268                 default:
 269                         break;
 270         }
 271
 272         if (lyxerr.debugging(Debug::FONT)) {
 273                 lyxerr[Debug::FONT] << "Font '" << f.stateText(0)
 274                         << "' matched by\n" << fromqstr(font.rawName()) << endl;
 275         }
 276
 277         lyxerr[Debug::FONT] << "The font has size: "
 278                             << font.pointSizeF() << endl;
 279
 280         // Is this an exact match?
 281         if (font.exactMatch())
 282                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 283         else
 284                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 285                                     << endl;
 286
 287         lyxerr[Debug::FONT] << "XFLD: " << fromqstr(font.rawName()) << endl;
 288
 289         metrics = QFontMetrics(font);
 290 }
 291
 292 #ifdef USE_LYX_FONTCACHE
 293 int QLFontInfo::width(Uchar val)
 294 {
 295         QLFontInfo::WidthCache::const_iterator cit = widthcache.find(val);
 296         if (cit != widthcache.end())
 297                 return cit->second;
 298
 299         int const w = metrics.width(QChar(val));
 300         widthcache[val] = w;
 301         return w;
 302 }
 303 #endif
 304
 305
 306 bool GuiFontLoader::available(LyXFont const & f)
 307 {
 308         if (!lyx_gui::use_gui)
 309                 return false;
 310
 311         static vector<int> cache_set(LyXFont::NUM_FAMILIES, false);
 312         static vector<int> cache(LyXFont::NUM_FAMILIES, false);
 313
 314         LyXFont::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