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         lyxerr[Debug::FONT] << "raw: " << fromqstr(font.rawName()) << endl;
 135
 136         QFontInfo fi(font);
 137         // QFontInfo won't find a font that has only a few glyphs at unusual
 138         // positions, e.g. the original esint10 font.
 139         // The workaround is to add dummy glyphs at least at all ASCII
 140         // positions.
 141
 142         // Note Qt lies about family quite often
 143         lyxerr[Debug::FONT] << "alleged fi family: "
 144                 << fromqstr(fi.family()) << endl;
 145
 146         // So we check rawName first
 147         if (contains(fromqstr(font.rawName()), family)) {
 148                 lyxerr[Debug::FONT] << " got it ";
 149                 return true;
 150         }
 151
 152         // Qt 4.1 returns "Multi" for all ? xft fonts
 153         if (font.rawName() == "xft" || font.rawName() == "Multi") {
 154                 if (contains(fromqstr(fi.family()), family)) {
 155                         lyxerr[Debug::FONT] << " got it (Xft) ";
 156                         return true;
 157                 }
 158         }
 159
 160         return false;
 161 }
 162
 163
 164 pair<QFont, bool> const getSymbolFont(string const & family)
 165 {
 166         lyxerr[Debug::FONT] << "Looking for font family "
 167                 << family << " ... ";
 168         string upper = family;
 169         upper[0] = toupper(family[0]);
 170
 171         QFont font;
 172         font.setKerning(false);
 173         font.setFamily(toqstr(family));
 174
 175         if (isChosenFont(font, family)) {
 176                 lyxerr[Debug::FONT] << "normal!" << endl;
 177                 return make_pair<QFont, bool>(font, true);
 178         }
 179
 180         font.setFamily(toqstr(upper));
 181
 182         if (isChosenFont(font, upper)) {
 183                 lyxerr[Debug::FONT] << "upper!" << endl;
 184                 return make_pair<QFont, bool>(font, true);
 185         }
 186
 187         // A simple setFamily() fails on Qt 2
 188
 189         font.setRawName(toqstr(getRawName(family)));
 190
 191         if (isChosenFont(font, family)) {
 192                 lyxerr[Debug::FONT] << "raw version!" << endl;
 193                 return make_pair<QFont, bool>(font, true);
 194         }
 195
 196         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 197         return make_pair<QFont, bool>(font, false);
 198 }
 199
 200 } // namespace anon
 201
 202
 203 GuiFontLoader::GuiFontLoader()
 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                                         fontinfo_[i1][i2][i3][i4] = 0;
 210 }
 211
 212
 213 void GuiFontLoader::update()
 214 {
 215         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 216                 for (int i2 = 0; i2 < 2; ++i2)
 217                         for (int i3 = 0; i3 < 4; ++i3)
 218                                 for (int i4 = 0; i4 < 10; ++i4) {
 219                                         delete fontinfo_[i1][i2][i3][i4];
 220                                         fontinfo_[i1][i2][i3][i4] = 0;
 221                                 }
 222 }
 223
 224
 225 /////////////////////////////////////////////////
 226
 227
 228 QLFontInfo::QLFontInfo(LyXFont const & f)
 229 {
 230         font.setKerning(false);
 231         string const pat = symbolFamily(f.family());
 232         if (!pat.empty()) {
 233                 bool tmp;
 234                 boost::tie(font, tmp) = getSymbolFont(pat);
 235         } else {
 236                 switch (f.family()) {
 237                 case LyXFont::ROMAN_FAMILY:
 238                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 239                                                     lyxrc.roman_font_foundry)));
 240                         break;
 241                 case LyXFont::SANS_FAMILY:
 242                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 243                                                     lyxrc.sans_font_foundry)));
 244                         break;
 245                 case LyXFont::TYPEWRITER_FAMILY:
 246                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 247                                                     lyxrc.typewriter_font_foundry)));
 248                         break;
 249                 default:
 250                         break;
 251                 }
 252         }
 253
 254         switch (f.series()) {
 255                 case LyXFont::MEDIUM_SERIES:
 256                         font.setWeight(QFont::Normal);
 257                         break;
 258                 case LyXFont::BOLD_SERIES:
 259                         font.setWeight(QFont::Bold);
 260                         break;
 261                 default:
 262                         break;
 263         }
 264
 265         switch (f.realShape()) {
 266                 case LyXFont::ITALIC_SHAPE:
 267                 case LyXFont::SLANTED_SHAPE:
 268                         font.setItalic(true);
 269                         break;
 270                 default:
 271                         break;
 272         }
 273
 274         if (lyxerr.debugging(Debug::FONT)) {
 275                 lyxerr[Debug::FONT] << "Font '" << f.stateText(0)
 276                         << "' matched by\n" << fromqstr(font.rawName()) << endl;
 277         }
 278
 279         // Is this an exact match?
 280         if (font.exactMatch())
 281                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 282         else
 283                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 284                                     << endl;
 285
 286         lyxerr[Debug::FONT] << "XFLD: " << fromqstr(font.rawName()) << endl;
 287
 288         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 289                                * lyxrc.zoom / 100.0);
 290
 291         lyxerr[Debug::FONT] << "The font has size: "
 292                             << font.pointSizeF() << endl;
 293
 294         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 295                 metrics.reset(new GuiFontMetrics(font));
 296         }
 297         else {
 298                 // handle small caps ourselves ...
 299                 LyXFont smallfont = f;
 300                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 301                 QFont font2(font);
 302                 font2.setKerning(false);
 303                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 304                                * lyxrc.zoom / 100.0);
 305
 306                 metrics.reset(new GuiFontMetrics(font, font2));
 307         }
 308
 309 }
 310
 311
 312 bool GuiFontLoader::available(LyXFont const & f)
 313 {
 314         static vector<int> cache_set(LyXFont::NUM_FAMILIES, false);
 315         static vector<int> cache(LyXFont::NUM_FAMILIES, false);
 316
 317         LyXFont::FONT_FAMILY family = f.family();
 318         if (cache_set[family])
 319                 return cache[family];
 320         cache_set[family] = true;
 321
 322         string const pat = symbolFamily(family);
 323         if (pat.empty())
 324                 // We don't care about non-symbol fonts
 325                 return false;
 326
 327         pair<QFont, bool> tmp = getSymbolFont(pat);
 328         if (!tmp.second)
 329                 return false;
 330
 331         cache[family] = true;
 332         return true;
 333 }
 334
 335 } // namespace frontend
 336 } // namespace lyx