src/frontends/xforms/xfont_loader.C

   1 /**
   2  * \file xfont_loader.C
   3  * Read the file COPYING
   4  *
   5  * \author Asger Alstrup
   6  *
   7  * Full author contact details are available in file CREDITS
   8  */
   9
  10 #include <config.h>
  11 #include <cmath>        // fabs()
  12
  13 #ifdef __GNUG__
  14 #pragma implementation
  15 #endif
  16
  17 #include "xfont_loader.h"
  18 #include "FontInfo.h"
  19 #include "gettext.h"
  20 #include "debug.h"
  21 #include "lyxrc.h"      // lyxrc.font_*
  22 #include "BufferView.h"
  23 #include "frontends/LyXView.h"
  24
  25 #include FORMS_H_LOCATION
  26
  27 using std::endl;
  28
  29 // The global fontloader
  30 xfont_loader fontloader;
  31
  32
  33 // Initialize font loader
  34 xfont_loader::xfont_loader()
  35 {
  36         reset();
  37 }
  38
  39
  40 // Destroy font loader
  41 xfont_loader::~xfont_loader()
  42 {
  43         unload();
  44 }
  45
  46
  47 // Update fonts after zoom, dpi, font names, or norm change
  48 // For now, we just ditch all fonts we have. Later, we should
  49 // reuse the ones that are already loaded.
  50 void xfont_loader::update()
  51 {
  52         unload();
  53 }
  54
  55
  56 // Reset font loader
  57 void xfont_loader::reset()
  58 {
  59         // Clear font infos, font structs and font metrics
  60         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
  61                 for (int i2 = 0; i2 < 2; ++i2)
  62                         for (int i3 = 0; i3 < 4; ++i3) {
  63                                 fontinfo[i1][i2][i3] = 0;
  64                                 for (int i4 = 0; i4<10; ++i4) {
  65                                         fontstruct[i1][i2][i3][i4] = 0;
  66                                 }
  67                         }
  68 }
  69
  70
  71 // Unload all fonts
  72 void xfont_loader::unload()
  73 {
  74         // Unload all fonts
  75         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
  76                 for (int i2 = 0; i2 < 2; ++i2)
  77                         for (int i3 = 0; i3 < 4; ++i3) {
  78                                 if (fontinfo[i1][i2][i3]) {
  79                                         delete fontinfo[i1][i2][i3];
  80                                         fontinfo[i1][i2][i3] = 0;
  81                                 }
  82                                 for (int i4 = 0; i4 < 10; ++i4) {
  83                                         if (fontstruct[i1][i2][i3][i4]) {
  84                                                 XFreeFont(fl_get_display(), fontstruct[i1][i2][i3][i4]);
  85                                                 fontstruct[i1][i2][i3][i4] = 0;
  86                                         }
  87                                 }
  88                         }
  89 }
  90
  91
  92 // Get font info
  93 /* Takes care of finding which font that can match the given request. Tries
  94 different alternatives. */
  95 void xfont_loader::getFontinfo(LyXFont::FONT_FAMILY family,
  96                              LyXFont::FONT_SERIES series,
  97                              LyXFont::FONT_SHAPE shape)
  98 {
  99         // Do we have the font info already?
 100         if (fontinfo[family][series][shape] != 0)
 101                 return;
 102
 103         // Special fonts
 104         switch (family)
 105         {
 106                 case LyXFont::SYMBOL_FAMILY:
 107                         fontinfo[family][series][shape] =
 108                                 new FontInfo("-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific");
 109                         return;
 110
 111                 case LyXFont::CMR_FAMILY:
 112                         fontinfo[family][series][shape] =
 113                                 new FontInfo("-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*");
 114                         return;
 115
 116                 case LyXFont::CMSY_FAMILY:
 117                         fontinfo[family][series][shape] =
 118                                 new FontInfo("-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*");
 119                         return;
 120
 121                 case LyXFont::CMM_FAMILY:
 122                         fontinfo[family][series][shape] =
 123                                 new FontInfo("-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*");
 124                         return;
 125
 126                 case LyXFont::CMEX_FAMILY:
 127                         fontinfo[family][series][shape] =
 128                                 new FontInfo("-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*");
 129                         return;
 130
 131                 case LyXFont::MSA_FAMILY:
 132                         fontinfo[family][series][shape] =
 133                                 new FontInfo("-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*");
 134                         return;
 135
 136                 case LyXFont::MSB_FAMILY:
 137                         fontinfo[family][series][shape] =
 138                                 new FontInfo("-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*");
 139                         return;
 140
 141                 case LyXFont::EUFRAK_FAMILY:
 142                         fontinfo[family][series][shape] =
 143                                 new FontInfo("-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*");
 144                         return;
 145
 146                 case LyXFont::WASY_FAMILY:
 147                         fontinfo[family][series][shape] =
 148                                 new FontInfo("-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*");
 149                         return;
 150
 151                 default:
 152                         break;
 153         }
 154
 155
 156         // Normal font. Let's search for an existing name that matches.
 157         string ffamily;
 158         string fseries;
 159         string fshape;
 160         string norm = lyxrc.font_norm;
 161         string fontname;
 162
 163         FontInfo * fi = new FontInfo;
 164         fontinfo[family][series][shape] = fi;
 165
 166         for (int cfam = 0; cfam < 2; ++cfam) {
 167                 // Determine family name
 168                 switch (family) {
 169                 case LyXFont::ROMAN_FAMILY:
 170                         switch (cfam) {
 171                         case 0: ffamily = lyxrc.roman_font_name; break;
 172                         case 1: ffamily = "-*-times";
 173                         default: cfam = 100;
 174                         }
 175                         break;
 176                 case LyXFont::SANS_FAMILY:
 177                         switch (cfam) {
 178                         case 0: ffamily = lyxrc.sans_font_name; break;
 179                         case 1: ffamily = "-*-helvetica";
 180                         default: cfam = 100;
 181                         }
 182                         break;
 183                 case LyXFont::TYPEWRITER_FAMILY:
 184                         switch (cfam) {
 185                         case 0: ffamily = lyxrc.typewriter_font_name; break;
 186                         case 1: ffamily = "-*-courier";
 187                         default: cfam = 100;
 188                         }
 189                         break;
 190                 default: ;
 191                 }
 192
 193                 for (int cser = 0; cser < 4; ++cser) {
 194                         // Determine series name
 195                         switch (series) {
 196                         case LyXFont::MEDIUM_SERIES:
 197                                 switch (cser) {
 198                                 case 0: fseries = "-medium"; break;
 199                                 case 1: fseries = "-book"; break;
 200                                 case 2: fseries = "-light";
 201                                 default: cser = 100;
 202                                 }
 203                                 break;
 204                         case LyXFont::BOLD_SERIES:
 205                                 switch (cser) {
 206                                 case 0: fseries = "-bold"; break;
 207                                 case 1: fseries = "-black"; break;
 208                                 case 2: fseries = "-demi"; break;
 209                                 case 3: fseries = "-demibold";
 210                                 default: cser = 100;
 211                                 }
 212                                 break;
 213                         default: ;
 214                         }
 215
 216                         for (int csha = 0; csha < 2; ++csha) {
 217                                 // Determine shape name
 218                                 switch (shape) {
 219                                 case LyXFont::UP_SHAPE:
 220                                 case LyXFont::SMALLCAPS_SHAPE:
 221                                         switch (csha) {
 222                                         case 0: fshape = "-r";
 223                                         default: csha = 100;
 224                                         }
 225                                         break;
 226                                 case LyXFont::ITALIC_SHAPE:
 227                                         switch (csha) {
 228                                         case 0: fshape = "-i"; break;
 229                                         case 1: fshape = "-o";
 230                                         default: csha = 100;
 231                                         }
 232                                         break;
 233                                 case LyXFont::SLANTED_SHAPE:
 234                                         switch (csha) {
 235                                         case 0: fshape = "-o"; break;
 236                                         case 1: fshape = "-i";
 237                                         default: csha = 100;
 238                                         }
 239                                         break;
 240                                 default: ;
 241                                 }
 242                                 //
 243                                 fontname = ffamily + fseries + fshape +
 244                                            "-normal-*-*-*-*-*-*-*-" + norm;
 245                                 fi->setPattern(fontname);
 246                                 if (fi->exist()) {
 247                                         return;
 248                                 }
 249                         }
 250                 }
 251         }
 252 }
 253
 254
 255 // A dummy fontstruct used when there is no gui.
 256 namespace {
 257
 258 XFontStruct dummyXFontStruct;
 259 bool dummyXFontStructisGood = false;
 260
 261 } // namespace anon
 262
 263 /// Do load font
 264 XFontStruct * xfont_loader::doLoad(LyXFont::FONT_FAMILY family,
 265                                 LyXFont::FONT_SERIES series,
 266                                 LyXFont::FONT_SHAPE shape,
 267                                 LyXFont::FONT_SIZE size)
 268 {
 269         if (!lyxrc.use_gui) {
 270                 if (!dummyXFontStructisGood) {
 271                         // no character specific info
 272                         dummyXFontStruct.per_char = 0;
 273                         // unit ascent on character displays
 274                         dummyXFontStruct.ascent = 1;
 275                         // no descent on character displays
 276                         dummyXFontStruct.descent = 0;
 277                         dummyXFontStructisGood = true;
 278                 }
 279
 280                 return &dummyXFontStruct;
 281         }
 282
 283         getFontinfo(family, series, shape);
 284         int fsize = int((lyxrc.font_sizes[size] * lyxrc.dpi *
 285                           (lyxrc.zoom/100.0)) / 72.27 + 0.5);
 286
 287         string font = fontinfo[family][series][shape]->getFontname(fsize);
 288
 289         if (font.empty()) {
 290                 lyxerr << "No font matches request. Using 'fixed'." << endl;
 291                 lyxerr << "Start LyX as 'lyx -dbg 515' to get more information." << endl;
 292                 font = "fixed";
 293         }
 294
 295         XFontStruct * fs = 0;
 296
 297         fs = XLoadQueryFont(fl_get_display(), 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 '" << font
 304                                 << "'. Using 'fixed'." << endl;
 305                         fs = XLoadQueryFont(fl_get_display(), "fixed");
 306                 }
 307         } else if (lyxerr.debugging(Debug::FONT)) {
 308                 // Tell user the font matching
 309                 LyXFont f;
 310                 f.setFamily(family);
 311                 f.setSeries(series);
 312                 f.setShape(shape);
 313                 f.setSize(size);
 314                 // The rest of the attributes are not interesting
 315                 f.setEmph(LyXFont::INHERIT);
 316                 f.setUnderbar(LyXFont::INHERIT);
 317                 f.setNoun(LyXFont::INHERIT);
 318                 f.setColor(LColor::inherit);
 319                 lyxerr << "Font '" << f.stateText(0)
 320                        << "' matched by\n" << font << endl;
 321         }
 322
 323         fontstruct[family][series][shape][size] = fs;
 324         return fs;
 325 }
 326
 327
 328 bool xfont_loader::available(LyXFont const & f)
 329 {
 330         if (!lyxrc.use_gui)
 331                 return false;
 332
 333         if (!fontinfo[f.family()][f.series()][f.realShape()])
 334                 getFontinfo(f.family(), f.series(), f.realShape());
 335         return fontinfo[f.family()][f.series()][f.realShape()]
 336                 ->getFontname(f.size()).size();
 337 }