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 3.2 beta1 returns "xft" for all xft fonts
 145         // Qt 4.1 returns "Multi" for all ? xft fonts
 146         if (font.rawName() == "xft" || font.rawName() == "Multi") {
 147                 if (contains(fromqstr(fi.family()), family)) {
 148                         lyxerr[Debug::FONT] << " got it (Xft) ";
 149                         return true;
 150                 }
 151         }
 152
 153         return false;
 154 }
 155
 156
 157 pair<QFont, bool> const getSymbolFont(string const & family)
 158 {
 159         lyxerr[Debug::FONT] << "Looking for font family "
 160                 << family << " ... ";
 161         string upper = family;
 162         upper[0] = toupper(family[0]);
 163
 164         QFont font;
 165         font.setKerning(false);
 166         font.setFamily(toqstr(family));
 167
 168         if (isChosenFont(font, family)) {
 169                 lyxerr[Debug::FONT] << "normal!" << endl;
 170                 return make_pair<QFont, bool>(font, true);
 171         }
 172
 173         font.setFamily(toqstr(upper));
 174
 175         if (isChosenFont(font, upper)) {
 176                 lyxerr[Debug::FONT] << "upper!" << endl;
 177                 return make_pair<QFont, bool>(font, true);
 178         }
 179
 180         // A simple setFamily() fails on Qt 2
 181
 182         font.setRawName(toqstr(getRawName(family)));
 183
 184         if (isChosenFont(font, family)) {
 185                 lyxerr[Debug::FONT] << "raw version!" << endl;
 186                 return make_pair<QFont, bool>(font, true);
 187         }
 188
 189         lyxerr[Debug::FONT] << " FAILED :-(" << endl;
 190         return make_pair<QFont, bool>(font, false);
 191 }
 192
 193 } // namespace anon
 194
 195
 196 GuiFontLoader::GuiFontLoader()
 197 {
 198         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 199                 for (int i2 = 0; i2 < 2; ++i2)
 200                         for (int i3 = 0; i3 < 4; ++i3)
 201                                 for (int i4 = 0; i4 < 10; ++i4)
 202                                         fontinfo_[i1][i2][i3][i4] = 0;
 203 }
 204
 205
 206 void GuiFontLoader::update()
 207 {
 208         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
 209                 for (int i2 = 0; i2 < 2; ++i2)
 210                         for (int i3 = 0; i3 < 4; ++i3)
 211                                 for (int i4 = 0; i4 < 10; ++i4) {
 212                                         delete fontinfo_[i1][i2][i3][i4];
 213                                         fontinfo_[i1][i2][i3][i4] = 0;
 214                                 }
 215 }
 216
 217
 218 /////////////////////////////////////////////////
 219
 220
 221 QLFontInfo::QLFontInfo(LyXFont const & f)
 222 {
 223         font.setKerning(false);
 224         string const pat = symbolFamily(f.family());
 225         if (!pat.empty()) {
 226                 bool tmp;
 227                 boost::tie(font, tmp) = getSymbolFont(pat);
 228         } else {
 229                 switch (f.family()) {
 230                 case LyXFont::ROMAN_FAMILY:
 231                         font.setFamily(toqstr(makeFontName(lyxrc.roman_font_name,
 232                                                     lyxrc.roman_font_foundry)));
 233                         break;
 234                 case LyXFont::SANS_FAMILY:
 235                         font.setFamily(toqstr(makeFontName(lyxrc.sans_font_name,
 236                                                     lyxrc.sans_font_foundry)));
 237                         break;
 238                 case LyXFont::TYPEWRITER_FAMILY:
 239                         font.setFamily(toqstr(makeFontName(lyxrc.typewriter_font_name,
 240                                                     lyxrc.typewriter_font_foundry)));
 241                         break;
 242                 default:
 243                         break;
 244                 }
 245         }
 246
 247         switch (f.series()) {
 248                 case LyXFont::MEDIUM_SERIES:
 249                         font.setWeight(QFont::Normal);
 250                         break;
 251                 case LyXFont::BOLD_SERIES:
 252                         font.setWeight(QFont::Bold);
 253                         break;
 254                 default:
 255                         break;
 256         }
 257
 258         switch (f.realShape()) {
 259                 case LyXFont::ITALIC_SHAPE:
 260                 case LyXFont::SLANTED_SHAPE:
 261                         font.setItalic(true);
 262                         break;
 263                 default:
 264                         break;
 265         }
 266
 267         if (lyxerr.debugging(Debug::FONT)) {
 268                 lyxerr[Debug::FONT] << "Font '" << f.stateText(0)
 269                         << "' matched by\n" << fromqstr(font.rawName()) << endl;
 270         }
 271
 272         // Is this an exact match?
 273         if (font.exactMatch())
 274                 lyxerr[Debug::FONT] << "This font is an exact match" << endl;
 275         else
 276                 lyxerr[Debug::FONT] << "This font is NOT an exact match"
 277                                     << endl;
 278
 279         lyxerr[Debug::FONT] << "XFLD: " << fromqstr(font.rawName()) << endl;
 280
 281         font.setPointSizeF(convert<double>(lyxrc.font_sizes[f.size()])
 282                                * lyxrc.zoom / 100.0);
 283
 284         lyxerr[Debug::FONT] << "The font has size: "
 285                             << font.pointSizeF() << endl;
 286
 287         if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 288                 metrics.reset(new GuiFontMetrics(font));
 289         }
 290         else {
 291                 // handle small caps ourselves ...
 292                 LyXFont smallfont = f;
 293                 smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 294                 QFont font2(font);
 295                 font2.setKerning(false);
 296                 font2.setPointSizeF(convert<double>(lyxrc.font_sizes[smallfont.size()])
 297                                * lyxrc.zoom / 100.0);
 298
 299                 metrics.reset(new GuiFontMetrics(font, font2));
 300         }
 301
 302 }
 303
 304
 305 bool GuiFontLoader::available(LyXFont const & f)
 306 {
 307         static vector<int> cache_set(LyXFont::NUM_FAMILIES, false);
 308         static vector<int> cache(LyXFont::NUM_FAMILIES, false);
 309
 310         LyXFont::FONT_FAMILY family = f.family();
 311         if (cache_set[family])
 312                 return cache[family];
 313         cache_set[family] = true;
 314
 315         string const pat = symbolFamily(family);
 316         if (pat.empty())
 317                 // We don't care about non-symbol fonts
 318                 return false;
 319
 320         pair<QFont, bool> tmp = getSymbolFont(pat);
 321         if (!tmp.second)
 322                 return false;
 323
 324         cache[family] = true;
 325         return true;
 326 }
 327
 328 } // namespace frontend
 329 } // namespace lyx