src/frontends/qt4/FontLoader.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 "FontLoader.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 FontLoader::~FontLoader() {
  48 }
  49
  50 namespace {
  51
  52 struct symbol_font {
  53         LyXFont::FONT_FAMILY lyx_family;
  54         string family;
  55         string xlfd;
  56 };
  57
  58 symbol_font symbol_fonts[] = {
  59         { LyXFont::SYMBOL_FAMILY,
  60                 "symbol",
  61                 "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific" },
  62
  63         { LyXFont::CMR_FAMILY,
  64                 "cmr10",
  65                 "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  66
  67         { LyXFont::CMSY_FAMILY,
  68                 "cmsy10",
  69                 "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
  70
  71         { LyXFont::CMM_FAMILY,
  72                 "cmmi10",
  73                 "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  74
  75         { LyXFont::CMEX_FAMILY,
  76                 "cmex10",
  77                 "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
  78
  79         { LyXFont::MSA_FAMILY,
  80                 "msam10",
  81                 "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
  82
  83         { LyXFont::MSB_FAMILY,
  84                 "msbm10",
  85                 "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
  86
  87         { LyXFont::EUFRAK_FAMILY,
  88                 "eufm10",
  89                 "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
  90
  91         { LyXFont::WASY_FAMILY,
  92                 "wasy10",
  93                 "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" }
  94 };
  95
  96 size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_font);
  97
  98
  99 string getRawName(string const & family)
 100 {
 101         for (size_t i = 0; i < nr_symbol_fonts; ++i)
 102                 if (family == symbol_fonts[i].family)
 103                         return symbol_fonts[i].xlfd;
 104
 105         lyxerr[Debug::FONT] << "BUG: family not found !" << endl;
 106         return string();
 107 }
 108
 109
 110 string const symbolFamily(LyXFont::FONT_FAMILY family)
 111 {
 112         for (size_t i = 0; i < nr_symbol_fonts; ++i) {
 113                 if (family == symbol_fonts[i].lyx_family)
 114                         return symbol_fonts[i].family;
 115         }
 116         return string();
 117 }
 118
 119
 120 bool isSymbolFamily(LyXFont::FONT_FAMILY family)
 121 {
 122         return family >= LyXFont::SYMBOL_FAMILY &&
 123                 family <= LyXFont::WASY_FAMILY;
 124 }
 125
 126
 127 bool isChosenFont(QFont & font, string const & family)
 128 {
 129         lyxerr[Debug::FONT] << "raw: " << fromqstr(font.rawName()) << endl;
 130
 131         QFontInfo fi(font);
 132
 133         // Note Qt lies about family quite often
 134         lyxerr[Debug::FONT] << "alleged fi family: "
 135                 << fromqstr(fi.family()) << endl;
 136
 137         // So we check rawName first
 138         if (contains(fromqstr(font.rawName()), family)) {
 139                 lyxerr[Debug::FONT] << " got it ";
 140                 return true;
 141         }
 142
 143         // Qt 3.2 beta1 returns "xft" for all xft fonts
 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.setFamily(toqstr(family));
 165
 166         if (isChosenFont(font, family)) {
 167                 lyxerr[Debug::FONT] << "normal!" << endl;
 168                 return make_pair<QFont, bool>(font, true);
 169         }
 170
 171         font.setFamily(toqstr(upper));
 172
 173         if (isChosenFont(font, upper)) {
 174                 lyxerr[Debug::FONT] << "upper!" << endl;
 175                 return make_pair<QFont, bool>(font, true);
 176         }
 177
 178         // A simple setFamily() fails on Qt 2
 179
 180         font.setRawName(toqstr(getRawName(family)));
 181
 182         if (isChosenFont(font, family)) {
 183                 lyxerr[Debug::FONT] << "raw version!" << endl;
 184                 return make_pair<QFont, bool>(font, true);
 185         }
 186
 187         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 188         return make_pair<QFont, bool>(font, false);
 189 }
 190
 191 } // namespace anon
 192
 193
 194 FontLoader::FontLoader()
 195 {
 196         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 197                 for (int i2 = 0; i2 < 2; ++i2)
 198                         for (int i3 = 0; i3 < 4; ++i3)
 199                                 for (int i4 = 0; i4 < 10; ++i4)
 200                                         fontinfo_[i1][i2][i3][i4] = 0;
 201 }
 202
 203
 204 void FontLoader::update()
 205 {
 206         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 207                 for (int i2 = 0; i2 < 2; ++i2)
 208                         for (int i3 = 0; i3 < 4; ++i3)
 209                                 for (int i4 = 0; i4 < 10; ++i4) {
 210                                         delete fontinfo_[i1][i2][i3][i4];
 211                                         fontinfo_[i1][i2][i3][i4] = 0;
 212                                 }
 213 }
 214
 215
 216 /////////////////////////////////////////////////
 217
 218
 219 QLFontInfo::QLFontInfo(LyXFont const & f)
 220         : metrics(font)
 221 {
 222
 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         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 247                                * lyxrc.zoom / 100.0);
 248
 249         switch (f.series()) {
 250                 case LyXFont::MEDIUM_SERIES:
 251                         font.setWeight(QFont::Normal);
 252                         break;
 253                 case LyXFont::BOLD_SERIES:
 254                         font.setWeight(QFont::Bold);
 255                         break;
 256                 default:
 257                         break;
 258         }
 259
 260         switch (f.realShape()) {
 261                 case LyXFont::ITALIC_SHAPE:
 262                 case LyXFont::SLANTED_SHAPE:
 263                         font.setItalic(true);
 264                         break;
 265                 default:
 266                         break;
 267         }
 268
 269         if (lyxerr.debugging(Debug::FONT)) {
 270                 lyxerr[Debug::FONT] << "Font '" << f.stateText(0)
 271                         << "' matched by\n" << fromqstr(font.rawName()) << endl;
 272         }
 273
 274         lyxerr[Debug::FONT] << "The font has size: "
 275                             << font.pointSizeF() << endl;
 276
 277         // Is this an exact match?
 278         if (font.exactMatch())
 279                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 280         else
 281                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 282                                     << endl;
 283
 284         lyxerr[Debug::FONT] << "XFLD: " << fromqstr(font.rawName()) << endl;
 285
 286         metrics = QFontMetrics(font);
 287 }
 288
 289
 290 int QLFontInfo::width(Uchar val)
 291 {
 292 // Starting with version 3.1.0, Qt/X11 does its own caching of
 293 // character width, so it is not necessary to provide ours.
 294 #if defined (USE_LYX_FONTCACHE)
 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 #else
 303         return metrics.width(QChar(val));
 304 #endif
 305 }
 306
 307
 308 bool FontLoader::available(LyXFont const & f)
 309 {
 310         if (!lyx_gui::use_gui)
 311                 return false;
 312
 313         static vector<int> cache_set(LyXFont::NUM_FAMILIES, false);
 314         static vector<int> cache(LyXFont::NUM_FAMILIES, false);
 315
 316         LyXFont::FONT_FAMILY family = f.family();
 317         if (cache_set[family])
 318                 return cache[family];
 319         cache_set[family] = true;
 320
 321         string const pat = symbolFamily(family);
 322         if (pat.empty())
 323                 // We don't care about non-symbol fonts
 324                 return false;
 325
 326         pair<QFont, bool> tmp = getSymbolFont(pat);
 327         if (!tmp.second)
 328                 return false;
 329
 330         cache[family] = true;
 331         return true;
 332 }