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 "support/convert.h"
  21 #include "support/filetools.h"
  22 #include "support/lstrings.h"
  23 #include "support/systemcall.h"
  24
  25 #include <qfontinfo.h>
  26
  27 #include <boost/tuple/tuple.hpp>
  28
  29 #ifdef Q_WS_X11
  30 #include <qwidget.h>
  31 #include <X11/Xlib.h>
  32 #include <algorithm>
  33 #endif
  34
  35 using lyx::support::contains;
  36
  37 using std::endl;
  38 using std::make_pair;
  39
  40 using std::pair;
  41 using std::vector;
  42 using std::string;
  43
  44
  45 namespace lyx {
  46 namespace frontend {
  47
  48 GuiFontLoader::~GuiFontLoader() {
  49 }
  50
  51 namespace {
  52
  53 struct symbol_font {
  54         LyXFont::FONT_FAMILY lyx_family;
  55         string family;
  56         string xlfd;
  57 };
  58
  59 symbol_font symbol_fonts[] = {
  60         { LyXFont::SYMBOL_FAMILY,
  61                 "symbol",
  62                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  63
  64         { LyXFont::CMR_FAMILY,
  65                 "cmr10",
  66                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  67
  68         { LyXFont::CMSY_FAMILY,
  69                 "cmsy10",
  70                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  71
  72         { LyXFont::CMM_FAMILY,
  73                 "cmmi10",
  74                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  75
  76         { LyXFont::CMEX_FAMILY,
  77                 "cmex10",
  78                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  79
  80         { LyXFont::MSA_FAMILY,
  81                 "msam10",
  82                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
  83
  84         { LyXFont::MSB_FAMILY,
  85                 "msbm10",
  86                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
  87
  88         { LyXFont::EUFRAK_FAMILY,
  89                 "eufm10",
  90                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  91
  92         { LyXFont::WASY_FAMILY,
  93                 "wasy10",
  94                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" }
  95 };
  96
  97 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
  98
  99
 100 string getRawName(string const & family)
 101 {
 102         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 103                 if (family == symbol_fonts[i].family)
 104                         return symbol_fonts[i].xlfd;
 105
 106         lyxerr[Debug::FONT] << "BUG: family not found !" << endl;
 107         return string();
 108 }
 109
 110
 111 string const symbolFamily(LyXFont::FONT_FAMILY family)
 112 {
 113         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 114                 if (family == symbol_fonts[i].lyx_family)
 115                         return symbol_fonts[i].family;
 116         }
 117         return string();
 118 }
 119
 120
 121 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 122 {
 123         return family >= LyXFont::SYMBOL_FAMILY &&
 124                 family <= LyXFont::WASY_FAMILY;
 125 }
 126
 127
 128 bool isChosenFont(QFont & font, string const & family)
 129 {
 130         lyxerr[Debug::FONT] << "raw: " << fromqstr(font.rawName()) << endl;
 131
 132         QFontInfo fi(font);
 133
 134         // Note Qt lies about family quite often
 135         lyxerr[Debug::FONT] << "alleged fi family: "
 136                 << fromqstr(fi.family()) << endl;
 137
 138         // So we check rawName first
 139         if (contains(fromqstr(font.rawName()), family)) {
 140                 lyxerr[Debug::FONT] << " got it ";
 141                 return true;
 142         }
 143
 144         // Qt 4.1 returns "Multi" for all ? xft fonts
 145         if (font.rawName() == "xft" || font.rawName() == "Multi") {
 146                 if (contains(fromqstr(fi.family()), family)) {
 147                         lyxerr[Debug::FONT] << " got it (Xft) ";
 148                         return true;
 149                 }
 150         }
 151
 152         return false;
 153 }
 154
 155
 156 pair<QFont, bool> const getSymbolFont(string const & family)
 157 {
 158         lyxerr[Debug::FONT] << "Looking for font family "
 159                 << family << " ... ";
 160         string upper = family;
 161         upper[0] = toupper(family[0]);
 162
 163         QFont font;
 164         font.setKerning(false);
 165         font.setFamily(toqstr(family));
 166
 167         if (isChosenFont(font, family)) {
 168                 lyxerr[Debug::FONT] << "normal!" << endl;
 169                 return make_pair<QFont, bool>(font, true);
 170         }
 171
 172         font.setFamily(toqstr(upper));
 173
 174         if (isChosenFont(font, upper)) {
 175                 lyxerr[Debug::FONT] << "upper!" << endl;
 176                 return make_pair<QFont, bool>(font, true);
 177         }
 178
 179         // A simple setFamily() fails on Qt 2
 180
 181         font.setRawName(toqstr(getRawName(family)));
 182
 183         if (isChosenFont(font, family)) {
 184                 lyxerr[Debug::FONT] << "raw version!" << endl;
 185                 return make_pair<QFont, bool>(font, true);
 186         }
 187
 188         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 189         return make_pair<QFont, bool>(font, false);
 190 }
 191
 192 } // namespace anon
 193
 194
 195 GuiFontLoader::GuiFontLoader()
 196 {
 197         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 198                 for (int i2 = 0; i2 < 2; ++i2)
 199                         for (int i3 = 0; i3 < 4; ++i3)
 200                                 for (int i4 = 0; i4 < 10; ++i4)
 201                                         fontinfo_[i1][i2][i3][i4] = 0;
 202 }
 203
 204
 205 void GuiFontLoader::update()
 206 {
 207         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 208                 for (int i2 = 0; i2 < 2; ++i2)
 209                         for (int i3 = 0; i3 < 4; ++i3)
 210                                 for (int i4 = 0; i4 < 10; ++i4) {
 211                                         delete fontinfo_[i1][i2][i3][i4];
 212                                         fontinfo_[i1][i2][i3][i4] = 0;
 213                                 }
 214 }
 215
 216
 217 /////////////////////////////////////////////////
 218
 219
 220 QLFontInfo::QLFontInfo(LyXFont const & f)
 221 {
 222         font.setKerning(false);
 223         string const pat = symbolFamily(f.family());
 224         if (!pat.empty()) {
 225                 bool tmp;
 226                 boost::tie(font, tmp) = getSymbolFont(pat);
 227         } else {
 228                 switch (f.family()) {
 229                 case LyXFont::ROMAN_FAMILY:
 230                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 231                                                     lyxrc.roman_font_foundry)));
 232                         break;
 233                 case LyXFont::SANS_FAMILY:
 234                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 235                                                     lyxrc.sans_font_foundry)));
 236                         break;
 237                 case LyXFont::TYPEWRITER_FAMILY:
 238                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 239                                                     lyxrc.typewriter_font_foundry)));
 240                         break;
 241                 default:
 242                         break;
 243                 }
 244         }
 245
 246         switch (f.series()) {
 247                 case LyXFont::MEDIUM_SERIES:
 248                         font.setWeight(QFont::Normal);
 249                         break;
 250                 case LyXFont::BOLD_SERIES:
 251                         font.setWeight(QFont::Bold);
 252                         break;
 253                 default:
 254                         break;
 255         }
 256
 257         switch (f.realShape()) {
 258                 case LyXFont::ITALIC_SHAPE:
 259                 case LyXFont::SLANTED_SHAPE:
 260                         font.setItalic(true);
 261                         break;
 262                 default:
 263                         break;
 264         }
 265
 266         if (lyxerr.debugging(Debug::FONT)) {
 267                 lyxerr[Debug::FONT] << "Font '" << f.stateText(0)
 268                         << "' matched by\n" << fromqstr(font.rawName()) << endl;
 269         }
 270
 271         // Is this an exact match?
 272         if (font.exactMatch())
 273                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 274         else
 275                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 276                                     << endl;
 277
 278         lyxerr[Debug::FONT] << "XFLD: " << fromqstr(font.rawName()) << endl;
 279
 280         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 281                                * lyxrc.zoom / 100.0);
 282
 283         lyxerr[Debug::FONT] << "The font has size: "
 284                             << font.pointSizeF() << endl;
 285
 286         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 287                 metrics.reset(new GuiFontMetrics(font));
 288         }
 289         else {
 290                 // handle small caps ourselves ...
 291                 LyXFont smallfont = f;
 292                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 293                 QFont font2(font);
 294                 font2.setKerning(false);
 295                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 296                                * lyxrc.zoom / 100.0);
 297
 298                 metrics.reset(new GuiFontMetrics(font, font2));
 299         }
 300
 301 }
 302
 303
 304 bool GuiFontLoader::available(LyXFont const & f)
 305 {
 306         static vector<int> cache_set(LyXFont::NUM_FAMILIES, false);
 307         static vector<int> cache(LyXFont::NUM_FAMILIES, false);
 308
 309         LyXFont::FONT_FAMILY family = f.family();
 310         if (cache_set[family])
 311                 return cache[family];
 312         cache_set[family] = true;
 313
 314         string const pat = symbolFamily(family);
 315         if (pat.empty())
 316                 // We don't care about non-symbol fonts
 317                 return false;
 318
 319         pair<QFont, bool> tmp = getSymbolFont(pat);
 320         if (!tmp.second)
 321                 return false;
 322
 323         cache[family] = true;
 324         return true;
 325 }
 326
 327 } // namespace frontend
 328 } // namespace lyx