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-*-*-*-*-*-*-*-*-*-*-*-*");
 112                         return;
 113
 114                 case LyXFont::CMR_FAMILY:
 115                         fontinfo[family][series][shape] =
 116                                 new FontInfo("-*-cmr-medium-*-*-*-*-*-*-*-*-*-*-*");
 117                         return;
 118
 119                 case LyXFont::CMSY_FAMILY:
 120                         fontinfo[family][series][shape] =
 121                                 new FontInfo("-*-cmsy-*-*-*-*-*-*-*-*-*-*-*-*");
 122                         return;
 123
 124                 case LyXFont::CMM_FAMILY:
 125                         fontinfo[family][series][shape] =
 126                                 new FontInfo("-*-cmmi-medium-*-*-*-*-*-*-*-*-*-*-*");
 127                         return;
 128
 129                 case LyXFont::CMEX_FAMILY:
 130                         fontinfo[family][series][shape] =
 131                                 new FontInfo("-*-cmex-*-*-*-*-*-*-*-*-*-*-*-*");
 132                         return;
 133
 134                 case LyXFont::MSA_FAMILY:
 135                         fontinfo[family][series][shape] =
 136                                 new FontInfo("-*-msam-*-*-*-*-*-*-*-*-*-*-*-*");
 137                         return;
 138
 139                 case LyXFont::MSB_FAMILY:
 140                         fontinfo[family][series][shape] =
 141                                 new FontInfo("-*-msbm-*-*-*-*-*-*-*-*-*-*-*-*");
 142                         return;
 143
 144                 default:
 145                         break;
 146         }
 147
 148
 149         // Normal font. Let's search for an existing name that matches.
 150         string ffamily;
 151         string fseries;
 152         string fshape;
 153         string norm = lyxrc.font_norm;
 154         string fontname;
 155
 156         FontInfo * fi = new FontInfo();
 157         fontinfo[family][series][shape] = fi;
 158
 159         for (int cfam = 0; cfam < 2; ++cfam) {
 160                 // Determine family name
 161                 switch (family) {
 162                 case LyXFont::ROMAN_FAMILY:
 163                         switch (cfam) {
 164                         case 0: ffamily = lyxrc.roman_font_name; break;
 165                         case 1: ffamily = "-*-times";
 166                         default: cfam = 100;
 167                         }
 168                         break;
 169                 case LyXFont::SANS_FAMILY:
 170                         switch (cfam) {
 171                         case 0: ffamily = lyxrc.sans_font_name; break;
 172                         case 1: ffamily = "-*-helvetica";
 173                         default: cfam = 100;
 174                         }
 175                         break;
 176                 case LyXFont::TYPEWRITER_FAMILY:
 177                         switch (cfam) {
 178                         case 0: ffamily = lyxrc.typewriter_font_name; break;
 179                         case 1: ffamily = "-*-courier";
 180                         default: cfam = 100;
 181                         }
 182                         break;
 183                 default: ;
 184                 }
 185
 186                 for (int cser = 0; cser < 4; ++cser) {
 187                         // Determine series name
 188                         switch (series) {
 189                         case LyXFont::MEDIUM_SERIES:
 190                                 switch (cser) {
 191                                 case 0: fseries = "-medium"; break;
 192                                 case 1: fseries = "-book"; break;
 193                                 case 2: fseries = "-light";
 194                                 default: cser = 100;
 195                                 }
 196                                 break;
 197                         case LyXFont::BOLD_SERIES:
 198                                 switch (cser) {
 199                                 case 0: fseries = "-bold"; break;
 200                                 case 1: fseries = "-black"; break;
 201                                 case 2: fseries = "-demi"; break;
 202                                 case 3: fseries = "-demibold";
 203                                 default: cser = 100;
 204                                 }
 205                                 break;
 206                         default: ;
 207                         }
 208
 209                         for (int csha = 0; csha < 2; ++csha) {
 210                                 // Determine shape name
 211                                 switch (shape) {
 212                                 case LyXFont::UP_SHAPE:
 213                                 case LyXFont::SMALLCAPS_SHAPE:
 214                                         switch (csha) {
 215                                         case 0: fshape = "-r";
 216                                         default: csha = 100;
 217                                         }
 218                                         break;
 219                                 case LyXFont::ITALIC_SHAPE:
 220                                         switch (csha) {
 221                                         case 0: fshape = "-i"; break;
 222                                         case 1: fshape = "-o";
 223                                         default: csha = 100;
 224                                         }
 225                                         break;
 226                                 case LyXFont::SLANTED_SHAPE:
 227                                         switch (csha) {
 228                                         case 0: fshape = "-o"; break;
 229                                         case 1: fshape = "-i";
 230                                         default: csha = 100;
 231                                         }
 232                                         break;
 233                                 default: ;
 234                                 }
 235                                 //
 236                                 fontname = ffamily + fseries + fshape +
 237                                            "-normal-*-*-*-*-*-*-*-" + norm;
 238                                 fi->setPattern(fontname);
 239                                 if (fi->exist()) {
 240                                         return;
 241                                 }
 242                         }
 243                 }
 244         }
 245 }
 246
 247
 248 // A dummy fontstruct used when there is no gui.
 249 namespace {
 250
 251 XFontStruct dummyXFontStruct;
 252 bool dummyXFontStructisGood = false;
 253
 254 } // namespace anon
 255
 256 /// Do load font
 257 XFontStruct * FontLoader::doLoad(LyXFont::FONT_FAMILY family,
 258                                 LyXFont::FONT_SERIES series,
 259                                 LyXFont::FONT_SHAPE shape,
 260                                 LyXFont::FONT_SIZE size)
 261 {
 262         if (!lyxrc.use_gui) {
 263                 if (!dummyXFontStructisGood) {
 264                         // no character specific info
 265                         dummyXFontStruct.per_char = 0;
 266                         // unit ascent on character displays
 267                         dummyXFontStruct.ascent = 1;
 268                         // no descent on character displays
 269                         dummyXFontStruct.descent = 0;
 270                         dummyXFontStructisGood = true;
 271                 }
 272
 273                 return &dummyXFontStruct;
 274         }
 275
 276         getFontinfo(family, series, shape);
 277         int fsize = int( (lyxrc.font_sizes[size] * lyxrc.dpi *
 278                           (lyxrc.zoom/100.0) ) / 72.27 + 0.5 );
 279
 280         string font = fontinfo[family][series][shape]->getFontname(fsize);
 281
 282         if (font.empty()) {
 283                 lyxerr << "No font matches request. Using 'fixed'." << endl;
 284                 lyxerr << "Start LyX as 'lyx -dbg 515' to get more information." << endl;
 285                 font = "fixed";
 286         }
 287
 288         XFontStruct * fs = 0;
 289
 290         current_view->owner()->messagePush(_("Loading font into X-Server..."));
 291
 292         fs = XLoadQueryFont(GUIRunTime::x11Display(), font.c_str());
 293
 294         if (fs == 0) {
 295                 if (font == "fixed") {
 296                         lyxerr << "We're doomed. Can't get 'fixed' font." << endl;
 297                 } else {
 298                         lyxerr << "Could not get font. Using 'fixed'." << endl;
 299                         fs = XLoadQueryFont(GUIRunTime::x11Display(), "fixed");
 300                 }
 301         } else if (lyxerr.debugging(Debug::FONT)) {
 302                 // Tell user the font matching
 303                 LyXFont f;
 304                 f.setFamily(family);
 305                 f.setSeries(series);
 306                 f.setShape(shape);
 307                 f.setSize(size);
 308                 // The rest of the attributes are not interesting
 309                 f.setEmph(LyXFont::INHERIT);
 310                 f.setUnderbar(LyXFont::INHERIT);
 311                 f.setNoun(LyXFont::INHERIT);
 312                 f.setColor(LColor::inherit);
 313                 lyxerr << "Font '" << f.stateText(0)
 314                        << "' matched by\n" << font << endl;
 315         }
 316
 317         current_view->owner()->messagePop();
 318
 319         fontstruct[family][series][shape][size] = fs;
 320         return fs;
 321 }
 322
 323
 324 bool FontLoader::available(LyXFont const & f)
 325 {
 326         if (!lyxrc.use_gui)
 327                 return false;
 328
 329         if (!fontinfo[f.family()][f.series()][f.realShape()])
 330                 getFontinfo(f.family(), f.series(), f.realShape());
 331         return fontinfo[f.family()][f.series()][f.realShape()]
 332                 ->getFontname(f.size()).size();
 333 }