src/frontends/xforms/xfont_loader.C

   1 /**
   2  * \file xfont_loader.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  *
   8  * Full author contact details are available in file CREDITS
   9  */
  10
  11 #include <config.h>
  12 #include <cmath>        // fabs()
  13
  14 #ifdef __GNUG__
  15 #pragma implementation
  16 #endif
  17
  18 #include "xfont_loader.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 "frontends/LyXView.h"
  25
  26 #include FORMS_H_LOCATION
  27
  28 using std::endl;
  29
  30 // The global fontloader
  31 xfont_loader fontloader;
  32
  33
  34 // Initialize font loader
  35 xfont_loader::xfont_loader()
  36 {
  37         reset();
  38 }
  39
  40
  41 // Destroy font loader
  42 xfont_loader::~xfont_loader()
  43 {
  44         unload();
  45 }
  46
  47
  48 // Update fonts after zoom, dpi, font names, or norm change
  49 // For now, we just ditch all fonts we have. Later, we should
  50 // reuse the ones that are already loaded.
  51 void xfont_loader::update()
  52 {
  53         unload();
  54 }
  55
  56
  57 // Reset font loader
  58 void xfont_loader::reset()
  59 {
  60         // Clear font infos, font structs and font metrics
  61         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
  62                 for (int i2 = 0; i2 < 2; ++i2)
  63                         for (int i3 = 0; i3 < 4; ++i3) {
  64                                 fontinfo[i1][i2][i3] = 0;
  65                                 for (int i4 = 0; i4<10; ++i4) {
  66                                         fontstruct[i1][i2][i3][i4] = 0;
  67                                 }
  68                         }
  69 }
  70
  71
  72 // Unload all fonts
  73 void xfont_loader::unload()
  74 {
  75         // Unload all fonts
  76         for (int i1 = 0; i1 < LyXFont::NUM_FAMILIES; ++i1)
  77                 for (int i2 = 0; i2 < 2; ++i2)
  78                         for (int i3 = 0; i3 < 4; ++i3) {
  79                                 if (fontinfo[i1][i2][i3]) {
  80                                         delete fontinfo[i1][i2][i3];
  81                                         fontinfo[i1][i2][i3] = 0;
  82                                 }
  83                                 for (int i4 = 0; i4 < 10; ++i4) {
  84                                         if (fontstruct[i1][i2][i3][i4]) {
  85                                                 XFreeFont(fl_get_display(), fontstruct[i1][i2][i3][i4]);
  86                                                 fontstruct[i1][i2][i3][i4] = 0;
  87                                         }
  88                                 }
  89                         }
  90 }
  91
  92
  93 // Get font info
  94 /* Takes care of finding which font that can match the given request. Tries
  95 different alternatives. */
  96 void xfont_loader::getFontinfo(LyXFont::FONT_FAMILY family,
  97                              LyXFont::FONT_SERIES series,
  98                              LyXFont::FONT_SHAPE shape)
  99 {
 100         // Do we have the font info already?
 101         if (fontinfo[family][series][shape] != 0)
 102                 return;
 103
 104         // Special fonts
 105         switch (family)
 106         {
 107                 case LyXFont::SYMBOL_FAMILY:
 108                         fontinfo[family][series][shape] =
 109                                 new FontInfo("-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific");
 110                         return;
 111
 112                 case LyXFont::CMR_FAMILY:
 113                         fontinfo[family][series][shape] =
 114                                 new FontInfo("-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*");
 115                         return;
 116
 117                 case LyXFont::CMSY_FAMILY:
 118                         fontinfo[family][series][shape] =
 119                                 new FontInfo("-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*");
 120                         return;
 121
 122                 case LyXFont::CMM_FAMILY:
 123                         fontinfo[family][series][shape] =
 124                                 new FontInfo("-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*");
 125                         return;
 126
 127                 case LyXFont::CMEX_FAMILY:
 128                         fontinfo[family][series][shape] =
 129                                 new FontInfo("-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*");
 130                         return;
 131
 132                 case LyXFont::MSA_FAMILY:
 133                         fontinfo[family][series][shape] =
 134                                 new FontInfo("-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*");
 135                         return;
 136
 137                 case LyXFont::MSB_FAMILY:
 138                         fontinfo[family][series][shape] =
 139                                 new FontInfo("-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*");
 140                         return;
 141
 142                 case LyXFont::EUFRAK_FAMILY:
 143                         fontinfo[family][series][shape] =
 144                                 new FontInfo("-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*");
 145                         return;
 146
 147                 case LyXFont::WASY_FAMILY:
 148                         fontinfo[family][series][shape] =
 149                                 new FontInfo("-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*");
 150                         return;
 151
 152                 default:
 153                         break;
 154         }
 155
 156
 157         // Normal font. Let's search for an existing name that matches.
 158         string ffamily;
 159         string fseries;
 160         string fshape;
 161         string norm = lyxrc.font_norm;
 162         string fontname;
 163
 164         FontInfo * fi = new FontInfo;
 165         fontinfo[family][series][shape] = fi;
 166
 167         for (int cfam = 0; cfam < 2; ++cfam) {
 168                 // Determine family name
 169                 switch (family) {
 170                 case LyXFont::ROMAN_FAMILY:
 171                         switch (cfam) {
 172                         case 0: ffamily = lyxrc.roman_font_name; break;
 173                         case 1: ffamily = "-*-times";
 174                         default: cfam = 100;
 175                         }
 176                         break;
 177                 case LyXFont::SANS_FAMILY:
 178                         switch (cfam) {
 179                         case 0: ffamily = lyxrc.sans_font_name; break;
 180                         case 1: ffamily = "-*-helvetica";
 181                         default: cfam = 100;
 182                         }
 183                         break;
 184                 case LyXFont::TYPEWRITER_FAMILY:
 185                         switch (cfam) {
 186                         case 0: ffamily = lyxrc.typewriter_font_name; break;
 187                         case 1: ffamily = "-*-courier";
 188                         default: cfam = 100;
 189                         }
 190                         break;
 191                 default: ;
 192                 }
 193
 194                 for (int cser = 0; cser < 4; ++cser) {
 195                         // Determine series name
 196                         switch (series) {
 197                         case LyXFont::MEDIUM_SERIES:
 198                                 switch (cser) {
 199                                 case 0: fseries = "-medium"; break;
 200                                 case 1: fseries = "-book"; break;
 201                                 case 2: fseries = "-light";
 202                                 default: cser = 100;
 203                                 }
 204                                 break;
 205                         case LyXFont::BOLD_SERIES:
 206                                 switch (cser) {
 207                                 case 0: fseries = "-bold"; break;
 208                                 case 1: fseries = "-black"; break;
 209                                 case 2: fseries = "-demi"; break;
 210                                 case 3: fseries = "-demibold";
 211                                 default: cser = 100;
 212                                 }
 213                                 break;
 214                         default: ;
 215                         }
 216
 217                         for (int csha = 0; csha < 2; ++csha) {
 218                                 // Determine shape name
 219                                 switch (shape) {
 220                                 case LyXFont::UP_SHAPE:
 221                                 case LyXFont::SMALLCAPS_SHAPE:
 222                                         switch (csha) {
 223                                         case 0: fshape = "-r";
 224                                         default: csha = 100;
 225                                         }
 226                                         break;
 227                                 case LyXFont::ITALIC_SHAPE:
 228                                         switch (csha) {
 229                                         case 0: fshape = "-i"; break;
 230                                         case 1: fshape = "-o";
 231                                         default: csha = 100;
 232                                         }
 233                                         break;
 234                                 case LyXFont::SLANTED_SHAPE:
 235                                         switch (csha) {
 236                                         case 0: fshape = "-o"; break;
 237                                         case 1: fshape = "-i";
 238                                         default: csha = 100;
 239                                         }
 240                                         break;
 241                                 default: ;
 242                                 }
 243                                 //
 244                                 fontname = ffamily + fseries + fshape +
 245                                            "-normal-*-*-*-*-*-*-*-" + norm;
 246                                 fi->setPattern(fontname);
 247                                 if (fi->exist()) {
 248                                         return;
 249                                 }
 250                         }
 251                 }
 252         }
 253 }
 254
 255
 256 // A dummy fontstruct used when there is no gui.
 257 namespace {
 258
 259 XFontStruct dummyXFontStruct;
 260 bool dummyXFontStructisGood = false;
 261
 262 } // namespace anon
 263
 264 /// Do load font
 265 XFontStruct * xfont_loader::doLoad(LyXFont::FONT_FAMILY family,
 266                                 LyXFont::FONT_SERIES series,
 267                                 LyXFont::FONT_SHAPE shape,
 268                                 LyXFont::FONT_SIZE size)
 269 {
 270         if (!lyxrc.use_gui) {
 271                 if (!dummyXFontStructisGood) {
 272                         // no character specific info
 273                         dummyXFontStruct.per_char = 0;
 274                         // unit ascent on character displays
 275                         dummyXFontStruct.ascent = 1;
 276                         // no descent on character displays
 277                         dummyXFontStruct.descent = 0;
 278                         dummyXFontStructisGood = true;
 279                 }
 280
 281                 return &dummyXFontStruct;
 282         }
 283
 284         getFontinfo(family, series, shape);
 285         int fsize = int((lyxrc.font_sizes[size] * lyxrc.dpi *
 286                           (lyxrc.zoom/100.0)) / 72.27 + 0.5);
 287
 288         string font = fontinfo[family][series][shape]->getFontname(fsize);
 289
 290         if (font.empty()) {
 291                 lyxerr << "No font matches request. Using 'fixed'." << endl;
 292                 lyxerr << "Start LyX as 'lyx -dbg 515' to get more information." << endl;
 293                 font = "fixed";
 294         }
 295
 296         XFontStruct * fs = 0;
 297
 298         fs = XLoadQueryFont(fl_get_display(), font.c_str());
 299
 300         if (fs == 0) {
 301                 if (font == "fixed") {
 302                         lyxerr << "We're doomed. Can't get 'fixed' font." << endl;
 303                 } else {
 304                         lyxerr << "Could not get font '" << font
 305                                 << "'. Using 'fixed'." << endl;
 306                         fs = XLoadQueryFont(fl_get_display(), "fixed");
 307                 }
 308         } else if (lyxerr.debugging(Debug::FONT)) {
 309                 // Tell user the font matching
 310                 LyXFont f;
 311                 f.setFamily(family);
 312                 f.setSeries(series);
 313                 f.setShape(shape);
 314                 f.setSize(size);
 315                 // The rest of the attributes are not interesting
 316                 f.setEmph(LyXFont::INHERIT);
 317                 f.setUnderbar(LyXFont::INHERIT);
 318                 f.setNoun(LyXFont::INHERIT);
 319                 f.setColor(LColor::inherit);
 320                 lyxerr << "Font '" << f.stateText(0)
 321                        << "' matched by\n" << font << endl;
 322         }
 323
 324         fontstruct[family][series][shape][size] = fs;
 325         return fs;
 326 }
 327
 328
 329 bool xfont_loader::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 }