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 #include "support/systemcall.h"
  26 #include "support/filetools.h"
  27
  28 #include FORMS_H_LOCATION
  29
  30 using std::endl;
  31
  32 // The global fontloader
  33 xfont_loader fontloader;
  34
  35
  36 // Initialize font loader
  37 xfont_loader::xfont_loader()
  38 {
  39         reset();
  40 }
  41
  42
  43 // Destroy font loader
  44 xfont_loader::~xfont_loader()
  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 xfont_loader::update()
  54 {
  55         unload();
  56 }
  57
  58
  59 // Reset font loader
  60 void xfont_loader::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 xfont_loader::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(fl_get_display(), fontstruct[i1][i2][i3][i4]);
  88                                                 fontstruct[i1][i2][i3][i4] = 0;
  89                                         }
  90                                 }
  91                         }
  92 }
  93
  94 namespace {
  95 string const symbolPattern(LyXFont::FONT_FAMILY family)
  96 {
  97         switch (family) {
  98         case LyXFont::SYMBOL_FAMILY:
  99                 return "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific";
 100
 101         case LyXFont::CMR_FAMILY:
 102                 return "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*";
 103
 104         case LyXFont::CMSY_FAMILY:
 105                 return "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*";
 106
 107         case LyXFont::CMM_FAMILY:
 108                 return "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*";
 109
 110         case LyXFont::CMEX_FAMILY:
 111                 return "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*";
 112
 113         case LyXFont::MSA_FAMILY:
 114                 return "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*";
 115
 116         case LyXFont::MSB_FAMILY:
 117                 return "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*";
 118
 119         case LyXFont::EUFRAK_FAMILY:
 120                 return "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*";
 121
 122         case LyXFont::WASY_FAMILY:
 123                 return "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*";
 124
 125         default:
 126                 return string();
 127         }
 128 }
 129
 130 }
 131
 132 // Get font info
 133 /* Takes care of finding which font that can match the given request. Tries
 134 different alternatives. */
 135 void xfont_loader::getFontinfo(LyXFont::FONT_FAMILY family,
 136                              LyXFont::FONT_SERIES series,
 137                              LyXFont::FONT_SHAPE shape)
 138 {
 139         // Do we have the font info already?
 140         if (fontinfo[family][series][shape] != 0)
 141                 return;
 142
 143         // Special fonts
 144         string pat = symbolPattern(family);
 145         if (!pat.empty()) {
 146                 static bool first_time = true;
 147                 fontinfo[family][series][shape] = new FontInfo(pat);
 148                 if (family != LyXFont::SYMBOL_FAMILY &&
 149                     !fontinfo[family][series][shape]->exist() &&
 150                     first_time) {
 151                         first_time = false;
 152                         string const dir =
 153                                 OnlyPath(LibFileSearch("xfonts", "fonts.dir"));
 154                         if (!dir.empty()) {
 155                                 int n;
 156                                 char ** p = XGetFontPath(fl_get_display(), &n);
 157                                 if (std::find(p, p+n, dir) != p+n)
 158                                         return;
 159                                 lyxerr << "Adding " << dir << " to the font path.\n";
 160                                 string const command = "xset fp+ " + dir;
 161                                 Systemcall s;
 162                                 if (!s.startscript(Systemcall::Wait, command)) {
 163                                         delete fontinfo[family][series][shape];
 164                                         fontinfo[family][series][shape] = new FontInfo(pat);
 165                                 } else
 166                                         lyxerr << "Unable to add font path.\n";
 167                         }
 168                 }
 169                 return;
 170         }
 171
 172
 173         // Normal font. Let's search for an existing name that matches.
 174         string ffamily;
 175         string fseries;
 176         string fshape;
 177         string norm = lyxrc.font_norm;
 178         string fontname;
 179
 180         FontInfo * fi = new FontInfo;
 181         fontinfo[family][series][shape] = fi;
 182
 183         for (int cfam = 0; cfam < 2; ++cfam) {
 184                 // Determine family name
 185                 switch (family) {
 186                 case LyXFont::ROMAN_FAMILY:
 187                         switch (cfam) {
 188                         case 0: ffamily = lyxrc.roman_font_name; break;
 189                         case 1: ffamily = "-*-times";
 190                         default: cfam = 100;
 191                         }
 192                         break;
 193                 case LyXFont::SANS_FAMILY:
 194                         switch (cfam) {
 195                         case 0: ffamily = lyxrc.sans_font_name; break;
 196                         case 1: ffamily = "-*-helvetica";
 197                         default: cfam = 100;
 198                         }
 199                         break;
 200                 case LyXFont::TYPEWRITER_FAMILY:
 201                         switch (cfam) {
 202                         case 0: ffamily = lyxrc.typewriter_font_name; break;
 203                         case 1: ffamily = "-*-courier";
 204                         default: cfam = 100;
 205                         }
 206                         break;
 207                 default: ;
 208                 }
 209
 210                 for (int cser = 0; cser < 4; ++cser) {
 211                         // Determine series name
 212                         switch (series) {
 213                         case LyXFont::MEDIUM_SERIES:
 214                                 switch (cser) {
 215                                 case 0: fseries = "-medium"; break;
 216                                 case 1: fseries = "-book"; break;
 217                                 case 2: fseries = "-light";
 218                                 default: cser = 100;
 219                                 }
 220                                 break;
 221                         case LyXFont::BOLD_SERIES:
 222                                 switch (cser) {
 223                                 case 0: fseries = "-bold"; break;
 224                                 case 1: fseries = "-black"; break;
 225                                 case 2: fseries = "-demi"; break;
 226                                 case 3: fseries = "-demibold";
 227                                 default: cser = 100;
 228                                 }
 229                                 break;
 230                         default: ;
 231                         }
 232
 233                         for (int csha = 0; csha < 2; ++csha) {
 234                                 // Determine shape name
 235                                 switch (shape) {
 236                                 case LyXFont::UP_SHAPE:
 237                                 case LyXFont::SMALLCAPS_SHAPE:
 238                                         switch (csha) {
 239                                         case 0: fshape = "-r";
 240                                         default: csha = 100;
 241                                         }
 242                                         break;
 243                                 case LyXFont::ITALIC_SHAPE:
 244                                         switch (csha) {
 245                                         case 0: fshape = "-i"; break;
 246                                         case 1: fshape = "-o";
 247                                         default: csha = 100;
 248                                         }
 249                                         break;
 250                                 case LyXFont::SLANTED_SHAPE:
 251                                         switch (csha) {
 252                                         case 0: fshape = "-o"; break;
 253                                         case 1: fshape = "-i";
 254                                         default: csha = 100;
 255                                         }
 256                                         break;
 257                                 default: ;
 258                                 }
 259                                 //
 260                                 fontname = ffamily + fseries + fshape +
 261                                            "-normal-*-*-*-*-*-*-*-" + norm;
 262                                 fi->setPattern(fontname);
 263                                 if (fi->exist()) {
 264                                         return;
 265                                 }
 266                         }
 267                 }
 268         }
 269 }
 270
 271
 272 // A dummy fontstruct used when there is no gui.
 273 namespace {
 274
 275 XFontStruct dummyXFontStruct;
 276 bool dummyXFontStructisGood = false;
 277
 278 } // namespace anon
 279
 280 /// Do load font
 281 XFontStruct * xfont_loader::doLoad(LyXFont::FONT_FAMILY family,
 282                                 LyXFont::FONT_SERIES series,
 283                                 LyXFont::FONT_SHAPE shape,
 284                                 LyXFont::FONT_SIZE size)
 285 {
 286         if (!lyxrc.use_gui) {
 287                 if (!dummyXFontStructisGood) {
 288                         // no character specific info
 289                         dummyXFontStruct.per_char = 0;
 290                         // unit ascent on character displays
 291                         dummyXFontStruct.ascent = 1;
 292                         // no descent on character displays
 293                         dummyXFontStruct.descent = 0;
 294                         dummyXFontStructisGood = true;
 295                 }
 296
 297                 return &dummyXFontStruct;
 298         }
 299
 300         getFontinfo(family, series, shape);
 301         // FIXME! CHECK! Should we use 72.0 or 72.27? (Lgb)
 302         int fsize = int((lyxrc.font_sizes[size] * lyxrc.dpi *
 303                           (lyxrc.zoom/100.0)) / 72.27 + 0.5);
 304
 305         string font = fontinfo[family][series][shape]->getFontname(fsize);
 306
 307         if (font.empty()) {
 308                 lyxerr << "No font matches request. Using 'fixed'." << endl;
 309                 lyxerr << "Start LyX as 'lyx -dbg 515' to get more information." << endl;
 310                 font = "fixed";
 311         }
 312
 313         XFontStruct * fs = 0;
 314
 315         fs = XLoadQueryFont(fl_get_display(), font.c_str());
 316
 317         if (fs == 0) {
 318                 if (font == "fixed") {
 319                         lyxerr << "We're doomed. Can't get 'fixed' font." << endl;
 320                 } else {
 321                         lyxerr << "Could not get font '" << font
 322                                 << "'. Using 'fixed'." << endl;
 323                         fs = XLoadQueryFont(fl_get_display(), "fixed");
 324                 }
 325         } else if (lyxerr.debugging(Debug::FONT)) {
 326                 // Tell user the font matching
 327                 LyXFont f;
 328                 f.setFamily(family);
 329                 f.setSeries(series);
 330                 f.setShape(shape);
 331                 f.setSize(size);
 332                 // The rest of the attributes are not interesting
 333                 f.setEmph(LyXFont::INHERIT);
 334                 f.setUnderbar(LyXFont::INHERIT);
 335                 f.setNoun(LyXFont::INHERIT);
 336                 f.setColor(LColor::inherit);
 337                 lyxerr << "Font '" << f.stateText(0)
 338                        << "' matched by\n" << font << endl;
 339         }
 340
 341         fontstruct[family][series][shape][size] = fs;
 342         return fs;
 343 }
 344
 345
 346 bool xfont_loader::available(LyXFont const & f)
 347 {
 348         if (!lyxrc.use_gui)
 349                 return false;
 350
 351         if (!fontinfo[f.family()][f.series()][f.realShape()])
 352                 getFontinfo(f.family(), f.series(), f.realShape());
 353         return fontinfo[f.family()][f.series()][f.realShape()]->exist();
 354 }