src/LaTeXFonts.cpp

   1 /**
   2  * \file LaTeXFonts.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Jürgen Spitzmüller
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "LaTeXFonts.h"
  14
  15 #include "LaTeXFeatures.h"
  16 #include "Lexer.h"
  17
  18 #include "frontends/alert.h"
  19
  20 #include "support/convert.h"
  21 #include "support/debug.h"
  22 #include "support/docstream.h"
  23 #include "support/FileName.h"
  24 #include "support/filetools.h"
  25 #include "support/gettext.h"
  26 #include "support/lstrings.h"
  27
  28
  29 using namespace std;
  30 using namespace lyx::support;
  31
  32
  33 namespace lyx {
  34
  35 LaTeXFonts latexfonts;
  36
  37
  38 LaTeXFont LaTeXFont::altFont(docstring const & name)
  39 {
  40         return theLaTeXFonts().getAltFont(name);
  41 }
  42
  43
  44 bool LaTeXFont::available(bool ot1, bool nomath)
  45 {
  46         if (nomath && !nomathfont_.empty())
  47                 return altFont(nomathfont_).available(ot1, nomath);
  48         else if (ot1 && !ot1font_.empty())
  49                 return (ot1font_ == "none") ?
  50                         true : altFont(ot1font_).available(ot1, nomath);
  51         else if (required_.empty() && package_.empty())
  52                 return true;
  53         else if (!required_.empty()
  54                 && LaTeXFeatures::isAvailable(to_ascii(required_)))
  55                 return true;
  56         else if (required_.empty() && !package_.empty()
  57                 && LaTeXFeatures::isAvailable(to_ascii(package_)))
  58                 return true;
  59         else if (!altfonts_.empty()) {
  60                 for (size_t i = 0; i < altfonts_.size(); ++i) {
  61                         if (altFont(altfonts_[i]).available(ot1, nomath))
  62                                 return true;
  63                 }
  64         }
  65         return false;
  66 }
  67
  68
  69 bool LaTeXFont::providesNoMath(bool ot1, bool complete)
  70 {
  71         docstring const usedfont = getUsedFont(ot1, complete, false, false);
  72
  73         if (usedfont.empty())
  74                 return false;
  75         else if (usedfont != name_)
  76                 return altFont(usedfont).providesNoMath(ot1, complete);
  77
  78         return (!nomathfont_.empty() && available(ot1, true));
  79 }
  80
  81
  82 bool LaTeXFont::providesOSF(bool ot1, bool complete, bool nomath)
  83 {
  84         docstring const usedfont = getUsedFont(ot1, complete, nomath, false);
  85
  86         if (usedfont.empty())
  87                 return false;
  88         else if (usedfont != name_)
  89                 return altFont(usedfont).providesOSF(ot1, complete, nomath);
  90         else if (!osffont_.empty())
  91                 return altFont(osffont_).available(ot1, nomath);
  92         else if (!available(ot1, nomath))
  93                 return false;
  94
  95         return (!osfoption_.empty() || !osfscoption_.empty());
  96 }
  97
  98
  99 bool LaTeXFont::providesSC(bool ot1, bool complete, bool nomath)
 100 {
 101         docstring const usedfont = getUsedFont(ot1, complete, nomath, false);
 102
 103         if (usedfont.empty())
 104                 return false;
 105         else if (usedfont != name_)
 106                 return altFont(usedfont).providesSC(ot1, complete, nomath);
 107         else if (!available(ot1, nomath))
 108                 return false;
 109
 110         return (!scoption_.empty() || !osfscoption_.empty());
 111 }
 112
 113
 114 bool LaTeXFont::hasMonolithicExpertSet(bool ot1, bool complete, bool nomath)
 115 {
 116         docstring const usedfont = getUsedFont(ot1, complete, nomath, false);
 117
 118         if (usedfont.empty())
 119                 return false;
 120         else if (usedfont != name_)
 121                 return altFont(usedfont).hasMonolithicExpertSet(ot1, complete, nomath);
 122         return (!osfoption_.empty() && !scoption_.empty() && osfoption_ == scoption_)
 123                 || (osfoption_.empty() && scoption_.empty() && !osfscoption_.empty());
 124 }
 125
 126
 127 bool LaTeXFont::providesScale(bool ot1, bool complete, bool nomath)
 128 {
 129         docstring const usedfont = getUsedFont(ot1, complete, nomath, false);
 130
 131         if (usedfont.empty())
 132                 return false;
 133         else if (usedfont != name_)
 134                 return altFont(usedfont).providesScale(ot1, complete, nomath);
 135         else if (!available(ot1, nomath))
 136                 return false;
 137         return (!scaleoption_.empty());
 138 }
 139
 140
 141 bool LaTeXFont::providesMoreOptions(bool ot1, bool complete, bool nomath)
 142 {
 143         docstring const usedfont = getUsedFont(ot1, complete, nomath, false);
 144
 145         if (usedfont.empty())
 146                 return false;
 147         else if (usedfont != name_)
 148                 return altFont(usedfont).providesMoreOptions(ot1, complete, nomath);
 149         else if (!available(ot1, nomath))
 150                 return false;
 151
 152         return (moreopts_);
 153 }
 154
 155 bool LaTeXFont::provides(std::string const & name, bool ot1, bool complete, bool nomath)
 156 {
 157         docstring const usedfont = getUsedFont(ot1, complete, nomath, false);
 158
 159         if (usedfont.empty())
 160                 return false;
 161         else if (usedfont != name_)
 162                 return altFont(usedfont).provides(name, ot1, complete, nomath);
 163         else if (provides_.empty())
 164                 return false;
 165
 166         for (size_t i = 0; i < provides_.size(); ++i) {
 167                 if (provides_[i] == name)
 168                         return true;
 169         }
 170         return false;
 171 }
 172
 173
 174 docstring const LaTeXFont::getUsedFont(bool ot1, bool complete, bool nomath, bool osf)
 175 {
 176         if (osf && osfFontOnly())
 177                 return osffont_;
 178         else if (nomath && !nomathfont_.empty() && available(ot1, true))
 179                 return nomathfont_;
 180         else if (ot1 && !ot1font_.empty())
 181                 return (ot1font_ == "none") ? docstring() : ot1font_;
 182         else if (family_ == "rm" && complete && !completefont_.empty()
 183                  && altFont(completefont_).available(ot1, nomath))
 184                         return completefont_;
 185         else if (switchdefault_) {
 186                 if (required_.empty()
 187                     || (!required_.empty()
 188                         && LaTeXFeatures::isAvailable(to_ascii(required_))))
 189                         return name_;
 190         }
 191         else if (!required_.empty()
 192                 && LaTeXFeatures::isAvailable(to_ascii(required_)))
 193                         return name_;
 194         else if (!package_.empty()
 195                 && LaTeXFeatures::isAvailable(to_ascii(package_)))
 196                         return name_;
 197         else if (!preamble_.empty() && package_.empty()
 198                  && required_.empty() && !switchdefault_
 199                  && altfonts_.empty()) {
 200                         return name_;
 201         }
 202         else if (!altfonts_.empty()) {
 203                 for (size_t i = 0; i < altfonts_.size(); ++i) {
 204                         LaTeXFont altf = altFont(altfonts_[i]);
 205                         if (altf.available(ot1, nomath))
 206                                 return altf.getUsedFont(ot1, complete, nomath, osf);
 207                 }
 208         }
 209
 210         return docstring();
 211 }
 212
 213
 214 docstring const LaTeXFont::getUsedPackage(bool ot1, bool complete, bool nomath)
 215 {
 216         docstring const usedfont = getUsedFont(ot1, complete, nomath, false);
 217         if (usedfont.empty())
 218                 return docstring();
 219         return theLaTeXFonts().getLaTeXFont(usedfont).package();
 220 }
 221
 222
 223 string const LaTeXFont::getAvailablePackage(bool dryrun)
 224 {
 225         if (package_.empty())
 226                 return string();
 227
 228         string const package = to_ascii(package_);
 229         if (!required_.empty() && LaTeXFeatures::isAvailable(to_ascii(required_)))
 230                 return package;
 231         else if (LaTeXFeatures::isAvailable(package))
 232                 return package;
 233         // Output unavailable packages in source preview
 234         else if (dryrun)
 235                 return package;
 236
 237         docstring const req = required_.empty() ? package_ : required_;
 238         frontend::Alert::warning(_("Font not available"),
 239                         bformat(_("The LaTeX package `%1$s' needed for the font `%2$s'\n"
 240                                   "is not available on your system. LyX will fall back to the default font."),
 241                                 req, guiname_), true);
 242
 243         return string();
 244 }
 245
 246
 247 string const LaTeXFont::getPackageOptions(bool ot1, bool complete, bool sc, bool osf,
 248                                           int scale, string const & extraopts, bool nomath)
 249 {
 250         ostringstream os;
 251         bool const needosfopt = (osf != osfdefault_);
 252         bool const has_osf = providesOSF(ot1, complete, nomath);
 253         bool const has_sc = providesSC(ot1, complete, nomath);
 254         bool const moreopts = providesMoreOptions(ot1, complete, nomath);
 255
 256         if (!packageoptions_.empty())
 257                 os << to_ascii(packageoptions_);
 258
 259         if (sc && needosfopt && has_osf && has_sc) {
 260                 if (!os.str().empty())
 261                         os << ',';
 262                 if (!osfscoption_.empty())
 263                         os << to_ascii(osfscoption_);
 264                 else
 265                         os << to_ascii(osfoption_)
 266                            << ',' << to_ascii(scoption_);
 267         } else if (needosfopt && has_osf) {
 268                 if (!os.str().empty())
 269                         os << ',';
 270                 os << to_ascii(osfoption_);
 271         } else if (sc && has_sc) {
 272                 if (!os.str().empty())
 273                         os << ',';
 274                 os << to_ascii(scoption_);
 275         }
 276
 277         if (scale != 100 && !scaleoption_.empty()
 278             && providesScale(ot1, complete, nomath)) {
 279                 if (!os.str().empty())
 280                         os << ',';
 281                 os << subst(to_ascii(scaleoption_), "$$val",
 282                             convert<std::string>(float(scale) / 100));
 283         }
 284
 285         if (moreopts && !extraopts.empty()) {
 286                 if (!os.str().empty())
 287                         os << ',';
 288                 os << extraopts;
 289         }
 290         return os.str();
 291 }
 292
 293
 294 string const LaTeXFont::getLaTeXCode(bool dryrun, bool ot1, bool complete, bool sc,
 295                                      bool osf, bool nomath, string const & extraopts,
 296                                      int const & scale)
 297 {
 298         ostringstream os;
 299
 300         docstring const usedfont = getUsedFont(ot1, complete, nomath, osf);
 301         if (usedfont.empty())
 302                 return string();
 303         else if (usedfont != name_)
 304                 return altFont(usedfont).getLaTeXCode(dryrun, ot1, complete, sc,
 305                                                       osf, nomath, extraopts, scale);
 306
 307         if (switchdefault_) {
 308                 if (family_.empty()) {
 309                         LYXERR0("Error: Font `" << name_ << "' has no family defined!");
 310                         return string();
 311                 }
 312                 if (available(ot1, nomath) || dryrun)
 313                         os << "\\renewcommand{\\" << to_ascii(family_) << "default}{"
 314                            << to_ascii(name_) << "}\n";
 315                 else
 316                         frontend::Alert::warning(_("Font not available"),
 317                                         bformat(_("The LaTeX package `%1$s' needed for the font `%2$s'\n"
 318                                                   "is not available on your system. LyX will fall back to the default font."),
 319                                                 required_, guiname_), true);
 320         } else {
 321                 string const package =
 322                         getAvailablePackage(dryrun);
 323                 string const packageopts = getPackageOptions(ot1, complete, sc, osf, scale, extraopts, nomath);
 324                 if (packageopts.empty() && !package.empty())
 325                         os << "\\usepackage{" << package << "}\n";
 326                 else if (!packageopts.empty() && !package.empty())
 327                         os << "\\usepackage[" << packageopts << "]{" << package << "}\n";
 328         }
 329         if (osf && providesOSF(ot1, complete, nomath) && !osffont_.empty())
 330                 os << altFont(osffont_).getLaTeXCode(dryrun, ot1, complete, sc, osf,
 331                                                      nomath, extraopts, scale);
 332
 333         if (!preamble_.empty())
 334                 os << to_utf8(preamble_);
 335
 336         return os.str();
 337 }
 338
 339
 340 bool LaTeXFont::hasFontenc(string const & name) const
 341 {
 342         for (auto const & fe : fontenc_) {
 343                 if (fe == name)
 344                         return true;
 345         }
 346         return false;
 347 }
 348
 349
 350 bool LaTeXFont::readFont(Lexer & lex)
 351 {
 352         enum LaTeXFontTags {
 353                 LF_ALT_FONTS = 1,
 354                 LF_COMPLETE_FONT,
 355                 LF_END,
 356                 LF_FAMILY,
 357                 LF_FONTENC,
 358                 LF_GUINAME,
 359                 LF_NOMATHFONT,
 360                 LF_OSFDEFAULT,
 361                 LF_OSFFONT,
 362                 LF_OSFFONTONLY,
 363                 LF_OSFOPTION,
 364                 LF_OSFSCOPTION,
 365                 LF_OT1_FONT,
 366                 LF_MOREOPTS,
 367                 LF_PACKAGE,
 368                 LF_PACKAGEOPTIONS,
 369                 LF_PREAMBLE,
 370                 LF_PROVIDES,
 371                 LF_REQUIRES,
 372                 LF_SCALEOPTION,
 373                 LF_SCOPTION,
 374                 LF_SWITCHDEFAULT
 375         };
 376
 377         // Keep these sorted alphabetically!
 378         LexerKeyword latexFontTags[] = {
 379                 { "altfonts",             LF_ALT_FONTS },
 380                 { "completefont",         LF_COMPLETE_FONT },
 381                 { "endfont",              LF_END },
 382                 { "family",               LF_FAMILY },
 383                 { "fontencoding",         LF_FONTENC },
 384                 { "guiname",              LF_GUINAME },
 385                 { "moreoptions",          LF_MOREOPTS },
 386                 { "nomathfont",           LF_NOMATHFONT },
 387                 { "osfdefault",           LF_OSFDEFAULT },
 388                 { "osffont",              LF_OSFFONT },
 389                 { "osffontonly",          LF_OSFFONTONLY },
 390                 { "osfoption",            LF_OSFOPTION },
 391                 { "osfscoption",          LF_OSFSCOPTION },
 392                 { "ot1font",              LF_OT1_FONT },
 393                 { "package",              LF_PACKAGE },
 394                 { "packageoptions",       LF_PACKAGEOPTIONS },
 395                 { "preamble",             LF_PREAMBLE },
 396                 { "provides",             LF_PROVIDES },
 397                 { "requires",             LF_REQUIRES },
 398                 { "scaleoption",          LF_SCALEOPTION },
 399                 { "scoption",             LF_SCOPTION },
 400                 { "switchdefault",        LF_SWITCHDEFAULT }
 401         };
 402
 403         bool error = false;
 404         bool finished = false;
 405         lex.pushTable(latexFontTags);
 406         // parse style section
 407         while (!finished && lex.isOK() && !error) {
 408                 int le = lex.lex();
 409                 // See comment in LyXRC.cpp.
 410                 switch (le) {
 411                 case Lexer::LEX_FEOF:
 412                         continue;
 413
 414                 case Lexer::LEX_UNDEF: // parse error
 415                         lex.printError("Unknown LaTeXFont tag `$$Token'");
 416                         error = true;
 417                         continue;
 418
 419                 default:
 420                         break;
 421                 }
 422                 switch (static_cast<LaTeXFontTags>(le)) {
 423                 case LF_END: // end of structure
 424                         finished = true;
 425                         break;
 426                 case LF_ALT_FONTS: {
 427                         lex.eatLine();
 428                         docstring altp = lex.getDocString();
 429                         altfonts_ = getVectorFromString(altp);
 430                         break;
 431                 }
 432                 case LF_COMPLETE_FONT:
 433                         lex >> completefont_;
 434                         break;
 435                 case LF_FAMILY:
 436                         lex >> family_;
 437                         break;
 438                 case LF_GUINAME:
 439                         lex >> guiname_;
 440                         break;
 441                 case LF_FONTENC: {
 442                         lex.eatLine();
 443                         string fe = lex.getString();
 444                         fontenc_ = getVectorFromString(fe);
 445                         break;
 446                 }
 447                 case LF_NOMATHFONT:
 448                         lex >> nomathfont_;
 449                         break;
 450                 case LF_OSFOPTION:
 451                         lex >> osfoption_;
 452                         break;
 453                 case LF_OSFFONT:
 454                         lex >> osffont_;
 455                         break;
 456                 case LF_OSFDEFAULT:
 457                         lex >> osfdefault_;
 458                         break;
 459                 case LF_OSFFONTONLY:
 460                         lex >> osffontonly_;
 461                         break;
 462                 case LF_OSFSCOPTION:
 463                         lex >> osfscoption_;
 464                         break;
 465                 case LF_OT1_FONT:
 466                         lex >> ot1font_;
 467                         break;
 468                 case LF_PACKAGE:
 469                         lex >> package_;
 470                         break;
 471                 case LF_PACKAGEOPTIONS:
 472                         lex >> packageoptions_;
 473                         break;
 474                 case LF_PREAMBLE:
 475                         preamble_ = lex.getLongString(from_ascii("EndPreamble"));
 476                         break;
 477                 case LF_PROVIDES: {
 478                         lex.eatLine();
 479                         string features = lex.getString();
 480                         provides_ = getVectorFromString(features);
 481                         break;
 482                 }
 483                 case LF_REQUIRES:
 484                         lex >> required_;
 485                         break;
 486                 case LF_SCALEOPTION:
 487                         lex >> scaleoption_;
 488                         break;
 489                 case LF_SCOPTION:
 490                         lex >> scoption_;
 491                         break;
 492                 case LF_MOREOPTS:
 493                         lex >> moreopts_;
 494                         break;
 495                 case LF_SWITCHDEFAULT:
 496                         lex >> switchdefault_;
 497                         break;
 498                 }
 499         }
 500         if (!finished) {
 501                 lex.printError("No End tag found for LaTeXFont tag `$$Token'");
 502                 return false;
 503         }
 504         lex.popTable();
 505         return finished && !error;
 506 }
 507
 508
 509 bool LaTeXFont::read(Lexer & lex)
 510 {
 511         switchdefault_ = 0;
 512         osfdefault_ = 0;
 513         moreopts_ = 0;
 514         osffontonly_ = 0;
 515
 516         if (!lex.next()) {
 517                 lex.printError("No name given for LaTeX font: `$$Token'.");
 518                 return false;
 519         }
 520
 521         name_ = lex.getDocString();
 522         LYXERR(Debug::INFO, "Reading LaTeX font " << name_);
 523         if (!readFont(lex)) {
 524                 LYXERR0("Error parsing LaTeX font `" << name_ << '\'');
 525                 return false;
 526         }
 527
 528         if (fontenc_.empty())
 529                 fontenc_.push_back("T1");
 530
 531         return true;
 532 }
 533
 534
 535 void LaTeXFonts::readLaTeXFonts()
 536 {
 537         // Read latexfonts file
 538         FileName filename = libFileSearch(string(), "latexfonts");
 539         if (filename.empty()) {
 540                 LYXERR0("Error: latexfonts file not found!");
 541                 return;
 542         }
 543         Lexer lex;
 544         lex.setFile(filename);
 545         lex.setContext("LaTeXFeatures::readLaTeXFonts");
 546         while (lex.isOK()) {
 547                 int le = lex.lex();
 548                 switch (le) {
 549                 case Lexer::LEX_FEOF:
 550                         continue;
 551
 552                 default:
 553                         break;
 554                 }
 555                 string const type = lex.getString();
 556                 if (type != "Font" && type != "AltFont") {
 557                         lex.printError("Unknown LaTeXFont tag `$$Token'");
 558                         continue;
 559                 }
 560                 LaTeXFont f;
 561                 f.read(lex);
 562                 if (!lex)
 563                         break;
 564
 565                 if (type == "AltFont")
 566                         texaltfontmap_[f.name()] = f;
 567                 else
 568                         texfontmap_[f.name()] = f;
 569         }
 570 }
 571
 572
 573 LaTeXFonts::TexFontMap LaTeXFonts::getLaTeXFonts()
 574 {
 575         if (texfontmap_.empty())
 576                 readLaTeXFonts();
 577         return texfontmap_;
 578 }
 579
 580
 581 LaTeXFont LaTeXFonts::getLaTeXFont(docstring const & name)
 582 {
 583         if (name == "default" || name == "auto")
 584                 return LaTeXFont();
 585         if (texfontmap_.empty())
 586                 readLaTeXFonts();
 587         if (texfontmap_.find(name) == texfontmap_.end()) {
 588                 LYXERR0("LaTeXFonts::getLaTeXFont: font '" << name << "' not found!");
 589                 return LaTeXFont();
 590         }
 591         return texfontmap_[name];
 592 }
 593
 594
 595 LaTeXFont LaTeXFonts::getAltFont(docstring const & name)
 596 {
 597         if (name == "default" || name == "auto")
 598                 return LaTeXFont();
 599         if (texaltfontmap_.empty())
 600                 readLaTeXFonts();
 601         if (texaltfontmap_.find(name) == texaltfontmap_.end()) {
 602                 LYXERR0("LaTeXFonts::getAltFont: alternative font '" << name << "' not found!");
 603                 return LaTeXFont();
 604         }
 605         return texaltfontmap_[name];
 606 }
 607
 608
 609 } // namespace lyx