src/FontLoader.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *          Copyright 1997 Asger Alstrup
   7  *           and the LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12 #include <cmath>        // fabs()
  13
  14 #ifdef __GNUG__
  15 #pragma implementation "FontLoader.h"
  16 #endif
  17
  18 #include "FontLoader.h"
  19 #include "FontInfo.h"
  20 #include "gettext.h"
  21 #include "debug.h"
  22 #include "lyxrc.h"      // lyxrc.font_*
  23 #include "BufferView.h"
  24 #include "LyXView.h"
  25 #include "frontends/GUIRunTime.h"
  26
  27 using std::endl;
  28
  29 extern BufferView * current_view;
  30
  31
  32 // The global fontloader
  33 FontLoader fontloader;
  34
  35
  36 // Initialize font loader
  37 FontLoader::FontLoader()
  38 {
  39         reset();
  40 }
  41
  42
  43 // Destroy font loader
  44 FontLoader::~FontLoader()
  45 {
  46         unload();
  47 }
  48
  49
  50 // Update fonts after zoom, dpi, font names, or norm change
  51 // For now, we just ditch all fonts we have. Later, we should
  52 // reuse the ones that are already loaded.
  53 void FontLoader::update()
  54 {
  55         unload();
  56 }
  57
  58
  59 // Reset font loader
  60 void FontLoader::reset()
  61 {
  62         // Clear font infos, font structs and font metrics
  63         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
  64                 for (int i2 = 0; i2 < 2; ++i2)
  65                         for (int i3 = 0; i3 < 4; ++i3) {
  66                                 fontinfo[i1][i2][i3] = 0;
  67                                 for (int i4 = 0; i4<10; ++i4) {
  68                                         fontstruct[i1][i2][i3][i4] = 0;
  69                                 }
  70                         }
  71 }
  72
  73
  74 // Unload all fonts
  75 void FontLoader::unload()
  76 {
  77         // Unload all fonts
  78         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
  79                 for (int i2 = 0; i2 < 2; ++i2)
  80                         for (int i3 = 0; i3 < 4; ++i3) {
  81                                 if (fontinfo[i1][i2][i3]) {
  82                                         delete fontinfo[i1][i2][i3];
  83                                         fontinfo[i1][i2][i3] = 0;
  84                                 }
  85                                 for (int i4 = 0; i4 < 10; ++i4) {
  86                                         if (fontstruct[i1][i2][i3][i4]) {
  87                                                 XFreeFont(GUIRunTime::x11Display(), fontstruct[i1][i2][i3][i4]);
  88                                                 fontstruct[i1][i2][i3][i4] = 0;
  89                                         }
  90                                 }
  91                         }
  92 }
  93
  94
  95 // Get font info
  96 /* Takes care of finding which font that can match the given request. Tries
  97 different alternatives. */
  98 void FontLoader::getFontinfo(LyXFont::FONT_FAMILY family,
  99                              LyXFont::FONT_SERIES series,
 100                              LyXFont::FONT_SHAPE shape)
 101 {
 102         // Do we have the font info already?
 103         if (fontinfo[family][series][shape] != 0)
 104                 return;
 105
 106         // Special fonts
 107         switch (family)
 108         {
 109                 case LyXFont::SYMBOL_FAMILY:
 110                         fontinfo[family][series][shape] =
 111                                 new FontInfo("-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific");
 112                         return;
 113
 114                 case LyXFont::CMR_FAMILY:
 115                         fontinfo[family][series][shape] =
 116                                 new FontInfo("-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*");
 117                         return;
 118
 119                 case LyXFont::CMSY_FAMILY:
 120                         fontinfo[family][series][shape] =
 121                                 new FontInfo("-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*");
 122                         return;
 123
 124                 case LyXFont::CMM_FAMILY:
 125                         fontinfo[family][series][shape] =
 126                                 new FontInfo("-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*");
 127                         return;
 128
 129                 case LyXFont::CMEX_FAMILY:
 130                         fontinfo[family][series][shape] =
 131                                 new FontInfo("-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*");
 132                         return;
 133
 134                 case LyXFont::MSA_FAMILY:
 135                         fontinfo[family][series][shape] =
 136                                 new FontInfo("-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*");
 137                         return;
 138
 139                 case LyXFont::MSB_FAMILY:
 140                         fontinfo[family][series][shape] =
 141                                 new FontInfo("-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*");
 142                         return;
 143
 144                 case LyXFont::EUFRAK_FAMILY:
 145                         fontinfo[family][series][shape] =
 146                                 new FontInfo("-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*");
 147                         return;
 148
 149                 default:
 150                         break;
 151         }
 152
 153
 154         // Normal font. Let's search for an existing name that matches.
 155         string ffamily;
 156         string fseries;
 157         string fshape;
 158         string norm = lyxrc.font_norm;
 159         string fontname;
 160
 161         FontInfo * fi = new FontInfo();
 162         fontinfo[family][series][shape] = fi;
 163
 164         for (int cfam = 0; cfam < 2; ++cfam) {
 165                 // Determine family name
 166                 switch (family) {
 167                 case LyXFont::ROMAN_FAMILY:
 168                         switch (cfam) {
 169                         case 0: ffamily = lyxrc.roman_font_name; break;
 170                         case 1: ffamily = "-*-times";
 171                         default: cfam = 100;
 172                         }
 173                         break;
 174                 case LyXFont::SANS_FAMILY:
 175                         switch (cfam) {
 176                         case 0: ffamily = lyxrc.sans_font_name; break;
 177                         case 1: ffamily = "-*-helvetica";
 178                         default: cfam = 100;
 179                         }
 180                         break;
 181                 case LyXFont::TYPEWRITER_FAMILY:
 182                         switch (cfam) {
 183                         case 0: ffamily = lyxrc.typewriter_font_name; break;
 184                         case 1: ffamily = "-*-courier";
 185                         default: cfam = 100;
 186                         }
 187                         break;
 188                 default: ;
 189                 }
 190
 191                 for (int cser = 0; cser < 4; ++cser) {
 192                         // Determine series name
 193                         switch (series) {
 194                         case LyXFont::MEDIUM_SERIES:
 195                                 switch (cser) {
 196                                 case 0: fseries = "-medium"; break;
 197                                 case 1: fseries = "-book"; break;
 198                                 case 2: fseries = "-light";
 199                                 default: cser = 100;
 200                                 }
 201                                 break;
 202                         case LyXFont::BOLD_SERIES:
 203                                 switch (cser) {
 204                                 case 0: fseries = "-bold"; break;
 205                                 case 1: fseries = "-black"; break;
 206                                 case 2: fseries = "-demi"; break;
 207                                 case 3: fseries = "-demibold";
 208                                 default: cser = 100;
 209                                 }
 210                                 break;
 211                         default: ;
 212                         }
 213
 214                         for (int csha = 0; csha < 2; ++csha) {
 215                                 // Determine shape name
 216                                 switch (shape) {
 217                                 case LyXFont::UP_SHAPE:
 218                                 case LyXFont::SMALLCAPS_SHAPE:
 219                                         switch (csha) {
 220                                         case 0: fshape = "-r";
 221                                         default: csha = 100;
 222                                         }
 223                                         break;
 224                                 case LyXFont::ITALIC_SHAPE:
 225                                         switch (csha) {
 226                                         case 0: fshape = "-i"; break;
 227                                         case 1: fshape = "-o";
 228                                         default: csha = 100;
 229                                         }
 230                                         break;
 231                                 case LyXFont::SLANTED_SHAPE:
 232                                         switch (csha) {
 233                                         case 0: fshape = "-o"; break;
 234                                         case 1: fshape = "-i";
 235                                         default: csha = 100;
 236                                         }
 237                                         break;
 238                                 default: ;
 239                                 }
 240                                 //
 241                                 fontname = ffamily + fseries + fshape +
 242                                            "-normal-*-*-*-*-*-*-*-" + norm;
 243                                 fi->setPattern(fontname);
 244                                 if (fi->exist()) {
 245                                         return;
 246                                 }
 247                         }
 248                 }
 249         }
 250 }
 251
 252
 253 // A dummy fontstruct used when there is no gui.
 254 namespace {
 255
 256 XFontStruct dummyXFontStruct;
 257 bool dummyXFontStructisGood = false;
 258
 259 } // namespace anon
 260
 261 /// Do load font
 262 XFontStruct * FontLoader::doLoad(LyXFont::FONT_FAMILY family,
 263                                 LyXFont::FONT_SERIES series,
 264                                 LyXFont::FONT_SHAPE shape,
 265                                 LyXFont::FONT_SIZE size)
 266 {
 267         if (!lyxrc.use_gui) {
 268                 if (!dummyXFontStructisGood) {
 269                         // no character specific info
 270                         dummyXFontStruct.per_char = 0;
 271                         // unit ascent on character displays
 272                         dummyXFontStruct.ascent = 1;
 273                         // no descent on character displays
 274                         dummyXFontStruct.descent = 0;
 275                         dummyXFontStructisGood = true;
 276                 }
 277
 278                 return &dummyXFontStruct;
 279         }
 280
 281         getFontinfo(family, series, shape);
 282         int fsize = int((lyxrc.font_sizes[size] * lyxrc.dpi *
 283                           (lyxrc.zoom/100.0)) / 72.27 + 0.5);
 284
 285         string font = fontinfo[family][series][shape]->getFontname(fsize);
 286
 287         if (font.empty()) {
 288                 lyxerr << "No font matches request. Using 'fixed'." << endl;
 289                 lyxerr << "Start LyX as 'lyx -dbg 515' to get more information." << endl;
 290                 font = "fixed";
 291         }
 292
 293         XFontStruct * fs = 0;
 294
 295         current_view->owner()->messagePush(_("Loading font into X-Server..."));
 296
 297         fs = XLoadQueryFont(GUIRunTime::x11Display(), font.c_str());
 298
 299         if (fs == 0) {
 300                 if (font == "fixed") {
 301                         lyxerr << "We're doomed. Can't get 'fixed' font." << endl;
 302                 } else {
 303                         lyxerr << "Could not get font. Using 'fixed'." << endl;
 304                         fs = XLoadQueryFont(GUIRunTime::x11Display(), "fixed");
 305                 }
 306         } else if (lyxerr.debugging(Debug::FONT)) {
 307                 // Tell user the font matching
 308                 LyXFont f;
 309                 f.setFamily(family);
 310                 f.setSeries(series);
 311                 f.setShape(shape);
 312                 f.setSize(size);
 313                 // The rest of the attributes are not interesting
 314                 f.setEmph(LyXFont::INHERIT);
 315                 f.setUnderbar(LyXFont::INHERIT);
 316                 f.setNoun(LyXFont::INHERIT);
 317                 f.setColor(LColor::inherit);
 318                 lyxerr << "Font '" << f.stateText(0)
 319                        << "' matched by\n" << font << endl;
 320         }
 321
 322         current_view->owner()->messagePop();
 323
 324         fontstruct[family][series][shape][size] = fs;
 325         return fs;
 326 }
 327
 328
 329 bool FontLoader::available(LyXFont const & f)
 330 {
 331         if (!lyxrc.use_gui)
 332                 return false;
 333
 334         if (!fontinfo[f.family()][f.series()][f.realShape()])
 335                 getFontinfo(f.family(), f.series(), f.realShape());
 336         return fontinfo[f.family()][f.series()][f.realShape()]
 337                 ->getFontname(f.size()).size();
 338 }