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         { LyXFont::ESINT_FAMILY,
  97                 "esint10",
  98                 "-*-esint10-medium-*-*-*-*-*-*-*-*-*-*-*" }
  99 };
 100
 101 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
 102
 103
 104 string getRawName(string const & family)
 105 {
 106         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 107                 if (family == symbol_fonts[i].family)
 108                         return symbol_fonts[i].xlfd;
 109
 110         lyxerr[Debug::FONT] << "BUG: family not found !" << endl;
 111         return string();
 112 }
 113
 114
 115 string const symbolFamily(LyXFont::FONT_FAMILY family)
 116 {
 117         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 118                 if (family == symbol_fonts[i].lyx_family)
 119                         return symbol_fonts[i].family;
 120         }
 121         return string();
 122 }
 123
 124
 125 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 126 {
 127         return family >= LyXFont::SYMBOL_FAMILY &&
 128                family <= LyXFont::ESINT_FAMILY;
 129 }
 130
 131
 132 bool isChosenFont(QFont & font, string const & family)
 133 {
 134         // QFontInfo won't find a font that has only a few glyphs at unusual
 135         // positions, e.g. the original esint10 font.
 136         // The workaround is to add dummy glyphs at least at all ASCII
 137         // positions.
 138         QFontInfo fi(font);
 139
 140         lyxerr[Debug::FONT] << "got: " << fromqstr(fi.family()) << endl;
 141
 142         if (contains(fromqstr(fi.family()), family)) {
 143                 lyxerr[Debug::FONT] << " got it ";
 144                 return true;
 145         }
 146
 147         return false;
 148 }
 149
 150
 151 pair<QFont, bool> const getSymbolFont(string const & family)
 152 {
 153         lyxerr[Debug::FONT] << "Looking for font family "
 154                 << family << " ... ";
 155         string upper = family;
 156         upper[0] = toupper(family[0]);
 157
 158         QFont font;
 159         font.setKerning(false);
 160         font.setFamily(toqstr(family));
 161
 162         if (isChosenFont(font, family)) {
 163                 lyxerr[Debug::FONT] << "normal!" << endl;
 164                 return make_pair<QFont, bool>(font, true);
 165         }
 166
 167         lyxerr[Debug::FONT] << "Trying " << upper << " ... ";
 168         font.setFamily(toqstr(upper));
 169
 170         if (isChosenFont(font, upper)) {
 171                 lyxerr[Debug::FONT] << "upper!" << endl;
 172                 return make_pair<QFont, bool>(font, true);
 173         }
 174
 175         // A simple setFamily() fails on Qt 2
 176
 177         string const rawName = getRawName(family);
 178         lyxerr[Debug::FONT] << "Trying " << rawName << " ... ";
 179         font.setRawName(toqstr(rawName));
 180
 181         if (isChosenFont(font, family)) {
 182                 lyxerr[Debug::FONT] << "raw version!" << endl;
 183                 return make_pair<QFont, bool>(font, true);
 184         }
 185
 186         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 187         return make_pair<QFont, bool>(font, false);
 188 }
 189
 190 } // namespace anon
 191
 192
 193 GuiFontLoader::GuiFontLoader()
 194 {
 195         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 196                 for (int i2 = 0; i2 < 2; ++i2)
 197                         for (int i3 = 0; i3 < 4; ++i3)
 198                                 for (int i4 = 0; i4 < 10; ++i4)
 199                                         fontinfo_[i1][i2][i3][i4] = 0;
 200 }
 201
 202
 203 void GuiFontLoader::update()
 204 {
 205         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 206                 for (int i2 = 0; i2 < 2; ++i2)
 207                         for (int i3 = 0; i3 < 4; ++i3)
 208                                 for (int i4 = 0; i4 < 10; ++i4) {
 209                                         delete fontinfo_[i1][i2][i3][i4];
 210                                         fontinfo_[i1][i2][i3][i4] = 0;
 211                                 }
 212 }
 213
 214
 215 /////////////////////////////////////////////////
 216
 217
 218 QLFontInfo::QLFontInfo(LyXFont const & f)
 219 {
 220         font.setKerning(false);
 221         string const pat = symbolFamily(f.family());
 222         if (!pat.empty()) {
 223                 bool tmp;
 224                 boost::tie(font, tmp) = getSymbolFont(pat);
 225         } else {
 226                 switch (f.family()) {
 227                 case LyXFont::ROMAN_FAMILY:
 228                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 229                                                     lyxrc.roman_font_foundry)));
 230                         break;
 231                 case LyXFont::SANS_FAMILY:
 232                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 233                                                     lyxrc.sans_font_foundry)));
 234                         break;
 235                 case LyXFont::TYPEWRITER_FAMILY:
 236                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 237                                                     lyxrc.typewriter_font_foundry)));
 238                         break;
 239                 default:
 240                         break;
 241                 }
 242         }
 243
 244         switch (f.series()) {
 245                 case LyXFont::MEDIUM_SERIES:
 246                         font.setWeight(QFont::Normal);
 247                         break;
 248                 case LyXFont::BOLD_SERIES:
 249                         font.setWeight(QFont::Bold);
 250                         break;
 251                 default:
 252                         break;
 253         }
 254
 255         switch (f.realShape()) {
 256                 case LyXFont::ITALIC_SHAPE:
 257                 case LyXFont::SLANTED_SHAPE:
 258                         font.setItalic(true);
 259                         break;
 260                 default:
 261                         break;
 262         }
 263
 264         if (lyxerr.debugging(Debug::FONT)) {
 265                 lyxerr[Debug::FONT] << "Font '" << to_utf8(f.stateText(0))
 266                         << "' matched by\n" << fromqstr(font.family()) << endl;
 267         }
 268
 269         // Is this an exact match?
 270         if (font.exactMatch())
 271                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 272         else
 273                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 274                                     << endl;
 275
 276         lyxerr[Debug::FONT] << "XFLD: " << fromqstr(font.rawName()) << endl;
 277
 278         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 279                                * lyxrc.zoom / 100.0);
 280
 281         lyxerr[Debug::FONT] << "The font has size: "
 282                             << font.pointSizeF() << endl;
 283
 284         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 285                 metrics.reset(new GuiFontMetrics(font));
 286         }
 287         else {
 288                 // handle small caps ourselves ...
 289                 LyXFont smallfont = f;
 290                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 291                 QFont font2(font);
 292                 font2.setKerning(false);
 293                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 294                                * lyxrc.zoom / 100.0);
 295
 296                 metrics.reset(new GuiFontMetrics(font, font2));
 297         }
 298
 299 }
 300
 301
 302 bool GuiFontLoader::available(LyXFont const & f)
 303 {
 304         static vector<int> cache_set(LyXFont::NUM_FAMILIES, false);
 305         static vector<int> cache(LyXFont::NUM_FAMILIES, false);
 306
 307         LyXFont::FONT_FAMILY family = f.family();
 308         if (cache_set[family])
 309                 return cache[family];
 310         cache_set[family] = true;
 311
 312         string const pat = symbolFamily(family);
 313         if (pat.empty())
 314                 // We don't care about non-symbol fonts
 315                 return false;
 316
 317         pair<QFont, bool> tmp = getSymbolFont(pat);
 318         if (!tmp.second)
 319                 return false;
 320
 321         cache[family] = true;
 322         return true;
 323 }
 324
 325 } // namespace frontend
 326 } // namespace lyx