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 (requires_.empty() && package_.empty())
  52                 return true;
  53         else if (!requires_.empty()
  54                 && LaTeXFeatures::isAvailable(to_ascii(requires_)))
  55                 return true;
  56         else if (requires_.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);
  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);
  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);
 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);
 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);
 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);
 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);
 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)
 175 {
 176         if (nomath && !nomathfont_.empty() && available(ot1, true))
 177                 return nomathfont_;
 178         else if (ot1 && !ot1font_.empty())
 179                 return (ot1font_ == "none") ? docstring() : ot1font_;
 180         else if (family_ == "rm" && complete && !completefont_.empty()
 181                  && altFont(completefont_).available(ot1, nomath))
 182                         return completefont_;
 183         else if (switchdefault_) {
 184                 if (requires_.empty()
 185                     || (!requires_.empty()
 186                         && LaTeXFeatures::isAvailable(to_ascii(requires_))))
 187                         return name_;
 188         }
 189         else if (!requires_.empty()
 190                 && LaTeXFeatures::isAvailable(to_ascii(requires_)))
 191                         return name_;
 192         else if (!package_.empty()
 193                 && LaTeXFeatures::isAvailable(to_ascii(package_)))
 194                         return name_;
 195         else if (!preamble_.empty() && package_.empty()
 196                  && requires_.empty() && !switchdefault_
 197                  && altfonts_.empty()) {
 198                         return name_;
 199         }
 200         else if (!altfonts_.empty()) {
 201                 for (size_t i = 0; i < altfonts_.size(); ++i) {
 202                         LaTeXFont altf = altFont(altfonts_[i]);
 203                         if (altf.available(ot1, nomath))
 204                                 return altf.getUsedFont(ot1, complete, nomath);
 205                 }
 206         }
 207
 208         return docstring();
 209 }
 210
 211
 212 docstring const LaTeXFont::getUsedPackage(bool ot1, bool complete, bool nomath)
 213 {
 214         docstring const usedfont = getUsedFont(ot1, complete, nomath);
 215         if (usedfont.empty())
 216                 return docstring();
 217         return theLaTeXFonts().getLaTeXFont(usedfont).package();
 218 }
 219
 220
 221 string const LaTeXFont::getAvailablePackage(bool dryrun)
 222 {
 223         if (package_.empty())
 224                 return string();
 225
 226         string const package = to_ascii(package_);
 227         if (!requires_.empty() && LaTeXFeatures::isAvailable(to_ascii(requires_)))
 228                 return package;
 229         else if (LaTeXFeatures::isAvailable(package))
 230                 return package;
 231         // Output unavailable packages in source preview
 232         else if (dryrun)
 233                 return package;
 234
 235         docstring const req = requires_.empty() ? package_ : requires_;
 236         frontend::Alert::warning(_("Font not available"),
 237                         bformat(_("The LaTeX package `%1$s' needed for the font `%2$s'\n"
 238                                   "is not available on your system. LyX will fall back to the default font."),
 239                                 req, guiname_), true);
 240
 241         return string();
 242 }
 243
 244
 245 string const LaTeXFont::getPackageOptions(bool ot1, bool complete, bool sc, bool osf,
 246                                           int scale, string const & extraopts, bool nomath)
 247 {
 248         ostringstream os;
 249         bool const needosfopt = (osf != osfdefault_);
 250         bool const has_osf = providesOSF(ot1, complete, nomath);
 251         bool const has_sc = providesSC(ot1, complete, nomath);
 252         bool const moreopts = providesMoreOptions(ot1, complete, nomath);
 253
 254         if (!packageoptions_.empty())
 255                 os << to_ascii(packageoptions_);
 256
 257         if (sc && needosfopt && has_osf && has_sc) {
 258                 if (!os.str().empty())
 259                         os << ',';
 260                 if (!osfscoption_.empty())
 261                         os << to_ascii(osfscoption_);
 262                 else
 263                         os << to_ascii(osfoption_)
 264                            << ',' << to_ascii(scoption_);
 265         } else if (needosfopt && has_osf) {
 266                 if (!os.str().empty())
 267                         os << ',';
 268                 os << to_ascii(osfoption_);
 269         } else if (sc && has_sc) {
 270                 if (!os.str().empty())
 271                         os << ',';
 272                 os << to_ascii(scoption_);
 273         }
 274
 275         if (scale != 100 && !scaleoption_.empty()
 276             && providesScale(ot1, complete, nomath)) {
 277                 if (!os.str().empty())
 278                         os << ',';
 279                 os << subst(to_ascii(scaleoption_), "$$val",
 280                             convert<std::string>(float(scale) / 100));
 281         }
 282
 283         if (moreopts && !extraopts.empty()) {
 284                 if (!os.str().empty())
 285                         os << ',';
 286                 os << extraopts;
 287         }
 288         return os.str();
 289 }
 290
 291
 292 string const LaTeXFont::getLaTeXCode(bool dryrun, bool ot1, bool complete, bool sc,
 293                                      bool osf, bool nomath, string const & extraopts,
 294                                      int const & scale)
 295 {
 296         ostringstream os;
 297
 298         docstring const usedfont = getUsedFont(ot1, complete, nomath);
 299         if (usedfont.empty())
 300                 return string();
 301         else if (usedfont != name_)
 302                 return altFont(usedfont).getLaTeXCode(dryrun, ot1, complete, sc,
 303                                                       osf, nomath, extraopts, scale);
 304
 305         if (switchdefault_) {
 306                 if (family_.empty()) {
 307                         LYXERR0("Error: Font `" << name_ << "' has no family defined!");
 308                         return string();
 309                 }
 310                 if (available(ot1, nomath) || dryrun)
 311                         os << "\\renewcommand{\\" << to_ascii(family_) << "default}{"
 312                            << to_ascii(name_) << "}\n";
 313                 else
 314                         frontend::Alert::warning(_("Font not available"),
 315                                         bformat(_("The LaTeX package `%1$s' needed for the font `%2$s'\n"
 316                                                   "is not available on your system. LyX will fall back to the default font."),
 317                                                 requires_, guiname_), true);
 318         } else {
 319                 string const package =
 320                         getAvailablePackage(dryrun);
 321                 string const packageopts = getPackageOptions(ot1, complete, sc, osf, scale, extraopts, nomath);
 322                 if (packageopts.empty() && !package.empty())
 323                         os << "\\usepackage{" << package << "}\n";
 324                 else if (!packageopts.empty() && !package.empty())
 325                         os << "\\usepackage[" << packageopts << "]{" << package << "}\n";
 326         }
 327         if (osf && providesOSF(ot1, complete, nomath) && !osffont_.empty())
 328                 os << altFont(osffont_).getLaTeXCode(dryrun, ot1, complete, sc, osf,
 329                                                      nomath, extraopts, scale);
 330
 331         if (!preamble_.empty())
 332                 os << to_utf8(preamble_);
 333
 334         return os.str();
 335 }
 336
 337
 338 bool LaTeXFont::hasFontenc(string const & name) const
 339 {
 340         for (auto const & fe : fontenc_) {
 341                 if (fe == name)
 342                         return true;
 343         }
 344         return false;
 345 }
 346
 347
 348 bool LaTeXFont::readFont(Lexer & lex)
 349 {
 350         enum LaTeXFontTags {
 351                 LF_ALT_FONTS = 1,
 352                 LF_COMPLETE_FONT,
 353                 LF_END,
 354                 LF_FAMILY,
 355                 LF_FONTENC,
 356                 LF_GUINAME,
 357                 LF_NOMATHFONT,
 358                 LF_OSFDEFAULT,
 359                 LF_OSFFONT,
 360                 LF_OSFOPTION,
 361                 LF_OSFSCOPTION,
 362                 LF_OT1_FONT,
 363                 LF_MOREOPTS,
 364                 LF_PACKAGE,
 365                 LF_PACKAGEOPTIONS,
 366                 LF_PREAMBLE,
 367                 LF_PROVIDES,
 368                 LF_REQUIRES,
 369                 LF_SCALEOPTION,
 370                 LF_SCOPTION,
 371                 LF_SWITCHDEFAULT
 372         };
 373
 374         // Keep these sorted alphabetically!
 375         LexerKeyword latexFontTags[] = {
 376                 { "altfonts",             LF_ALT_FONTS },
 377                 { "completefont",         LF_COMPLETE_FONT },
 378                 { "endfont",              LF_END },
 379                 { "family",               LF_FAMILY },
 380                 { "fontencoding",         LF_FONTENC },
 381                 { "guiname",              LF_GUINAME },
 382                 { "moreoptions",          LF_MOREOPTS },
 383                 { "nomathfont",           LF_NOMATHFONT },
 384                 { "osfdefault",           LF_OSFDEFAULT },
 385                 { "osffont",              LF_OSFFONT },
 386                 { "osfoption",            LF_OSFOPTION },
 387                 { "osfscoption",          LF_OSFSCOPTION },
 388                 { "ot1font",              LF_OT1_FONT },
 389                 { "package",              LF_PACKAGE },
 390                 { "packageoptions",       LF_PACKAGEOPTIONS },
 391                 { "preamble",             LF_PREAMBLE },
 392                 { "provides",             LF_PROVIDES },
 393                 { "requires",             LF_REQUIRES },
 394                 { "scaleoption",          LF_SCALEOPTION },
 395                 { "scoption",             LF_SCOPTION },
 396                 { "switchdefault",        LF_SWITCHDEFAULT }
 397         };
 398
 399         bool error = false;
 400         bool finished = false;
 401         lex.pushTable(latexFontTags);
 402         // parse style section
 403         while (!finished && lex.isOK() && !error) {
 404                 int le = lex.lex();
 405                 // See comment in LyXRC.cpp.
 406                 switch (le) {
 407                 case Lexer::LEX_FEOF:
 408                         continue;
 409
 410                 case Lexer::LEX_UNDEF: // parse error
 411                         lex.printError("Unknown LaTeXFont tag `$$Token'");
 412                         error = true;
 413                         continue;
 414
 415                 default:
 416                         break;
 417                 }
 418                 switch (static_cast<LaTeXFontTags>(le)) {
 419                 case LF_END: // end of structure
 420                         finished = true;
 421                         break;
 422                 case LF_ALT_FONTS: {
 423                         lex.eatLine();
 424                         docstring altp = lex.getDocString();
 425                         altfonts_ = getVectorFromString(altp);
 426                         break;
 427                 }
 428                 case LF_COMPLETE_FONT:
 429                         lex >> completefont_;
 430                         break;
 431                 case LF_FAMILY:
 432                         lex >> family_;
 433                         break;
 434                 case LF_GUINAME:
 435                         lex >> guiname_;
 436                         break;
 437                 case LF_FONTENC: {
 438                         lex.eatLine();
 439                         string fe = lex.getString();
 440                         fontenc_ = getVectorFromString(fe);
 441                         break;
 442                 }
 443                 case LF_NOMATHFONT:
 444                         lex >> nomathfont_;
 445                         break;
 446                 case LF_OSFOPTION:
 447                         lex >> osfoption_;
 448                         break;
 449                 case LF_OSFFONT:
 450                         lex >> osffont_;
 451                         break;
 452                 case LF_OSFDEFAULT:
 453                         lex >> osfdefault_;
 454                         break;
 455                 case LF_OSFSCOPTION:
 456                         lex >> osfscoption_;
 457                         break;
 458                 case LF_OT1_FONT:
 459                         lex >> ot1font_;
 460                         break;
 461                 case LF_PACKAGE:
 462                         lex >> package_;
 463                         break;
 464                 case LF_PACKAGEOPTIONS:
 465                         lex >> packageoptions_;
 466                         break;
 467                 case LF_PREAMBLE:
 468                         preamble_ = lex.getLongString(from_ascii("EndPreamble"));
 469                         break;
 470                 case LF_PROVIDES: {
 471                         lex.eatLine();
 472                         string features = lex.getString();
 473                         provides_ = getVectorFromString(features);
 474                         break;
 475                 }
 476                 case LF_REQUIRES:
 477                         lex >> requires_;
 478                         break;
 479                 case LF_SCALEOPTION:
 480                         lex >> scaleoption_;
 481                         break;
 482                 case LF_SCOPTION:
 483                         lex >> scoption_;
 484                         break;
 485                 case LF_MOREOPTS:
 486                         lex >> moreopts_;
 487                         break;
 488                 case LF_SWITCHDEFAULT:
 489                         lex >> switchdefault_;
 490                         break;
 491                 }
 492         }
 493         if (!finished) {
 494                 lex.printError("No End tag found for LaTeXFont tag `$$Token'");
 495                 return false;
 496         }
 497         lex.popTable();
 498         return finished && !error;
 499 }
 500
 501
 502 bool LaTeXFont::read(Lexer & lex)
 503 {
 504         switchdefault_ = 0;
 505         osfdefault_ = 0;
 506         moreopts_ = 0;
 507
 508         if (!lex.next()) {
 509                 lex.printError("No name given for LaTeX font: `$$Token'.");
 510                 return false;
 511         }
 512
 513         name_ = lex.getDocString();
 514         LYXERR(Debug::INFO, "Reading LaTeX font " << name_);
 515         if (!readFont(lex)) {
 516                 LYXERR0("Error parsing LaTeX font `" << name_ << '\'');
 517                 return false;
 518         }
 519
 520         if (fontenc_.empty())
 521                 fontenc_.push_back("T1");
 522
 523         return true;
 524 }
 525
 526
 527 void LaTeXFonts::readLaTeXFonts()
 528 {
 529         // Read latexfonts file
 530         FileName filename = libFileSearch(string(), "latexfonts");
 531         if (filename.empty()) {
 532                 LYXERR0("Error: latexfonts file not found!");
 533                 return;
 534         }
 535         Lexer lex;
 536         lex.setFile(filename);
 537         lex.setContext("LaTeXFeatures::readLaTeXFonts");
 538         while (lex.isOK()) {
 539                 int le = lex.lex();
 540                 switch (le) {
 541                 case Lexer::LEX_FEOF:
 542                         continue;
 543
 544                 default:
 545                         break;
 546                 }
 547                 string const type = lex.getString();
 548                 if (type != "Font" && type != "AltFont") {
 549                         lex.printError("Unknown LaTeXFont tag `$$Token'");
 550                         continue;
 551                 }
 552                 LaTeXFont f;
 553                 f.read(lex);
 554                 if (!lex)
 555                         break;
 556
 557                 if (type == "AltFont")
 558                         texaltfontmap_[f.name()] = f;
 559                 else
 560                         texfontmap_[f.name()] = f;
 561         }
 562 }
 563
 564
 565 LaTeXFonts::TexFontMap LaTeXFonts::getLaTeXFonts()
 566 {
 567         if (texfontmap_.empty())
 568                 readLaTeXFonts();
 569         return texfontmap_;
 570 }
 571
 572
 573 LaTeXFont LaTeXFonts::getLaTeXFont(docstring const & name)
 574 {
 575         if (name == "default" || name == "auto")
 576                 return LaTeXFont();
 577         if (texfontmap_.empty())
 578                 readLaTeXFonts();
 579         if (texfontmap_.find(name) == texfontmap_.end()) {
 580                 LYXERR0("LaTeXFonts::getLaTeXFont: font '" << name << "' not found!");
 581                 return LaTeXFont();
 582         }
 583         return texfontmap_[name];
 584 }
 585
 586
 587 LaTeXFont LaTeXFonts::getAltFont(docstring const & name)
 588 {
 589         if (name == "default" || name == "auto")
 590                 return LaTeXFont();
 591         if (texaltfontmap_.empty())
 592                 readLaTeXFonts();
 593         if (texaltfontmap_.find(name) == texaltfontmap_.end()) {
 594                 LYXERR0("LaTeXFonts::getAltFont: alternative font '" << name << "' not found!");
 595                 return LaTeXFont();
 596         }
 597         return texaltfontmap_[name];
 598 }
 599
 600
 601 } // namespace lyx