src/converter.C

   1 /**
   2  * \file converter.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Dekel Tsur
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "converter.h"
  14
  15 #include "ConverterCache.h"
  16 #include "buffer.h"
  17 #include "buffer_funcs.h"
  18 #include "bufferparams.h"
  19 #include "debug.h"
  20 #include "format.h"
  21 #include "gettext.h"
  22 #include "language.h"
  23 #include "LaTeX.h"
  24 #include "mover.h"
  25
  26 #include "frontends/Alert.h"
  27
  28 #include "support/filetools.h"
  29 #include "support/lyxlib.h"
  30 #include "support/os.h"
  31 #include "support/path.h"
  32 #include "support/systemcall.h"
  33
  34
  35 namespace lyx {
  36
  37 using support::addName;
  38 using support::bformat;
  39 using support::changeExtension;
  40 using support::compare_ascii_no_case;
  41 using support::contains;
  42 using support::dirList;
  43 using support::FileName;
  44 using support::getExtension;
  45 using support::isFileReadable;
  46 using support::libFileSearch;
  47 using support::libScriptSearch;
  48 using support::makeAbsPath;
  49 using support::makeRelPath;
  50 using support::onlyFilename;
  51 using support::onlyPath;
  52 using support::Path;
  53 using support::prefixIs;
  54 using support::quoteName;
  55 using support::removeExtension;
  56 using support::split;
  57 using support::subst;
  58 using support::Systemcall;
  59
  60 using std::endl;
  61 using std::find_if;
  62 using std::string;
  63 using std::vector;
  64 using std::distance;
  65
  66 namespace Alert = lyx::frontend::Alert;
  67
  68
  69 namespace {
  70
  71 string const token_from("$$i");
  72 string const token_base("$$b");
  73 string const token_to("$$o");
  74 string const token_path("$$p");
  75
  76
  77
  78 string const add_options(string const & command, string const & options)
  79 {
  80         string head;
  81         string const tail = split(command, head, ' ');
  82         return head + ' ' + options + ' ' + tail;
  83 }
  84
  85
  86 string const dvipdfm_options(BufferParams const & bp)
  87 {
  88         string result;
  89
  90         if (bp.papersize != PAPER_CUSTOM) {
  91                 string const paper_size = bp.paperSizeName();
  92                 if (paper_size != "b5" && paper_size != "foolscap")
  93                         result = "-p "+ paper_size;
  94
  95                 if (bp.orientation == ORIENTATION_LANDSCAPE)
  96                         result += " -l";
  97         }
  98
  99         return result;
 100 }
 101
 102
 103 class ConverterEqual : public std::binary_function<string, string, bool> {
 104 public:
 105         ConverterEqual(string const & from, string const & to)
 106                 : from_(from), to_(to) {}
 107         bool operator()(Converter const & c) const {
 108                 return c.from == from_ && c.to == to_;
 109         }
 110 private:
 111         string const from_;
 112         string const to_;
 113 };
 114
 115 } // namespace anon
 116
 117
 118 Converter::Converter(string const & f, string const & t,
 119                      string const & c, string const & l)
 120         : from(f), to(t), command(c), flags(l),
 121           From(0), To(0), latex(false), xml(false),
 122           original_dir(false), need_aux(false)
 123 {}
 124
 125
 126 void Converter::readFlags()
 127 {
 128         string flag_list(flags);
 129         while (!flag_list.empty()) {
 130                 string flag_name, flag_value;
 131                 flag_list = split(flag_list, flag_value, ',');
 132                 flag_value = split(flag_value, flag_name, '=');
 133                 if (flag_name == "latex")
 134                         latex = true;
 135                 else if (flag_name == "xml")
 136                         xml = true;
 137                 else if (flag_name == "originaldir")
 138                         original_dir = true;
 139                 else if (flag_name == "needaux")
 140                         need_aux = true;
 141                 else if (flag_name == "resultdir")
 142                         result_dir = (flag_value.empty())
 143                                 ? token_base : flag_value;
 144                 else if (flag_name == "resultfile")
 145                         result_file = flag_value;
 146                 else if (flag_name == "parselog")
 147                         parselog = flag_value;
 148         }
 149         if (!result_dir.empty() && result_file.empty())
 150                 result_file = "index." + formats.extension(to);
 151         //if (!contains(command, token_from))
 152         //      latex = true;
 153 }
 154
 155
 156 bool operator<(Converter const & a, Converter const & b)
 157 {
 158         // use the compare_ascii_no_case instead of compare_no_case,
 159         // because in turkish, 'i' is not the lowercase version of 'I',
 160         // and thus turkish locale breaks parsing of tags.
 161         int const i = compare_ascii_no_case(a.From->prettyname(),
 162                                             b.From->prettyname());
 163         if (i == 0)
 164                 return compare_ascii_no_case(a.To->prettyname(),
 165                                              b.To->prettyname()) < 0;
 166         else
 167                 return i < 0;
 168 }
 169
 170
 171 Converter const * Converters::getConverter(string const & from,
 172                                             string const & to) const
 173 {
 174         ConverterList::const_iterator const cit =
 175                 find_if(converterlist_.begin(), converterlist_.end(),
 176                         ConverterEqual(from, to));
 177         if (cit != converterlist_.end())
 178                 return &(*cit);
 179         else
 180                 return 0;
 181 }
 182
 183
 184 int Converters::getNumber(string const & from, string const & to) const
 185 {
 186         ConverterList::const_iterator const cit =
 187                 find_if(converterlist_.begin(), converterlist_.end(),
 188                         ConverterEqual(from, to));
 189         if (cit != converterlist_.end())
 190                 return distance(converterlist_.begin(), cit);
 191         else
 192                 return -1;
 193 }
 194
 195
 196 void Converters::add(string const & from, string const & to,
 197                      string const & command, string const & flags)
 198 {
 199         formats.add(from);
 200         formats.add(to);
 201         ConverterList::iterator it = find_if(converterlist_.begin(),
 202                                              converterlist_.end(),
 203                                              ConverterEqual(from , to));
 204
 205         Converter converter(from, to, command, flags);
 206         if (it != converterlist_.end() && !flags.empty() && flags[0] == '*') {
 207                 converter = *it;
 208                 converter.command = command;
 209                 converter.flags = flags;
 210         }
 211         converter.readFlags();
 212
 213         if (converter.latex && (latex_command_.empty() || to == "dvi"))
 214                 latex_command_ = subst(command, token_from, "");
 215         // If we have both latex & pdflatex, we set latex_command to latex.
 216         // The latex_command is used to update the .aux file when running
 217         // a converter that uses it.
 218
 219         if (it == converterlist_.end()) {
 220                 converterlist_.push_back(converter);
 221         } else {
 222                 converter.From = it->From;
 223                 converter.To = it->To;
 224                 *it = converter;
 225         }
 226 }
 227
 228
 229 void Converters::erase(string const & from, string const & to)
 230 {
 231         ConverterList::iterator const it =
 232                 find_if(converterlist_.begin(),
 233                         converterlist_.end(),
 234                         ConverterEqual(from, to));
 235         if (it != converterlist_.end())
 236                 converterlist_.erase(it);
 237 }
 238
 239
 240 // This method updates the pointers From and To in all the converters.
 241 // The code is not very efficient, but it doesn't matter as the number
 242 // of formats and converters is small.
 243 // Furthermore, this method is called only on startup, or after
 244 // adding/deleting a format in FormPreferences (the latter calls can be
 245 // eliminated if the formats in the Formats class are stored using a map or
 246 // a list (instead of a vector), but this will cause other problems).
 247 void Converters::update(Formats const & formats)
 248 {
 249         ConverterList::iterator it = converterlist_.begin();
 250         ConverterList::iterator end = converterlist_.end();
 251         for (; it != end; ++it) {
 252                 it->From = formats.getFormat(it->from);
 253                 it->To = formats.getFormat(it->to);
 254         }
 255 }
 256
 257
 258 // This method updates the pointers From and To in the last converter.
 259 // It is called when adding a new converter in FormPreferences
 260 void Converters::updateLast(Formats const & formats)
 261 {
 262         if (converterlist_.begin() != converterlist_.end()) {
 263                 ConverterList::iterator it = converterlist_.end() - 1;
 264                 it->From = formats.getFormat(it->from);
 265                 it->To = formats.getFormat(it->to);
 266         }
 267 }
 268
 269
 270 void Converters::sort()
 271 {
 272         std::sort(converterlist_.begin(), converterlist_.end());
 273 }
 274
 275
 276 OutputParams::FLAVOR Converters::getFlavor(Graph::EdgePath const & path)
 277 {
 278         for (Graph::EdgePath::const_iterator cit = path.begin();
 279              cit != path.end(); ++cit) {
 280                 Converter const & conv = converterlist_[*cit];
 281                 if (conv.latex)
 282                         if (contains(conv.to, "pdf"))
 283                                 return OutputParams::PDFLATEX;
 284                 if (conv.xml)
 285                         return OutputParams::XML;
 286         }
 287         return OutputParams::LATEX;
 288 }
 289
 290
 291 bool Converters::convert(Buffer const * buffer,
 292                          FileName const & from_file, FileName const & to_file,
 293                          FileName const & orig_from,
 294                          string const & from_format, string const & to_format,
 295                          ErrorList & errorList, int conversionflags)
 296 {
 297         if (from_format == to_format)
 298                 return move(from_format, from_file, to_file, false);
 299
 300         if ((conversionflags & try_cache) &&
 301             ConverterCache::get().inCache(orig_from, to_format))
 302                 return ConverterCache::get().copy(orig_from, to_format, to_file);
 303
 304         Graph::EdgePath edgepath = getPath(from_format, to_format);
 305         if (edgepath.empty()) {
 306                 if (conversionflags & try_default) {
 307                         // if no special converter defined, then we take the
 308                         // default one from ImageMagic.
 309                         string const from_ext = from_format.empty() ?
 310                                 getExtension(from_file.absFilename()) :
 311                                 formats.extension(from_format);
 312                         string const to_ext = formats.extension(to_format);
 313                         string const command =
 314                                 support::os::python() + ' ' +
 315                                 quoteName(libFileSearch("scripts", "convertDefault.py").toFilesystemEncoding()) +
 316                                 ' ' +
 317                                 quoteName(from_ext + ':' + from_file.toFilesystemEncoding()) +
 318                                 ' ' +
 319                                 quoteName(to_ext + ':' + to_file.toFilesystemEncoding());
 320                         LYXERR(Debug::FILES)
 321                                 << "No converter defined! "
 322                                    "I use convertDefault.py:\n\t"
 323                                 << command << endl;
 324                         Systemcall one;
 325                         one.startscript(Systemcall::Wait, command);
 326                         if (isFileReadable(to_file)) {
 327                                 if (conversionflags & try_cache)
 328                                         ConverterCache::get().add(orig_from,
 329                                                         to_format, to_file);
 330                                 return true;
 331                         }
 332                 }
 333                 Alert::error(_("Cannot convert file"),
 334                              bformat(_("No information for converting %1$s "
 335                                                     "format files to %2$s.\n"
 336                                                     "Define a converter in the preferences."),
 337                                                         from_ascii(from_format), from_ascii(to_format)));
 338                 return false;
 339         }
 340
 341         // buffer is only invalid for importing, and then runparams is not
 342         // used anyway.
 343         OutputParams runparams(buffer ? &buffer->params().encoding() : 0);
 344         runparams.flavor = getFlavor(edgepath);
 345
 346         // Some converters (e.g. lilypond) can only output files to the
 347         // current directory, so we need to change the current directory.
 348         // This has the added benefit that all other files that may be
 349         // generated by the converter are deleted when LyX closes and do not
 350         // clutter the real working directory.
 351         string path = onlyPath(from_file.absFilename());
 352         Path p(path);
 353
 354         // empty the error list before any new conversion takes place.
 355         errorList.clear();
 356
 357         bool run_latex = false;
 358         string from_base = changeExtension(from_file.absFilename(), "");
 359         string to_base = changeExtension(to_file.absFilename(), "");
 360         FileName infile;
 361         FileName outfile = from_file;
 362         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 363              cit != edgepath.end(); ++cit) {
 364                 Converter const & conv = converterlist_[*cit];
 365                 bool dummy = conv.To->dummy() && conv.to != "program";
 366                 if (!dummy)
 367                         LYXERR(Debug::FILES) << "Converting from  "
 368                                << conv.from << " to " << conv.to << endl;
 369                 infile = outfile;
 370                 outfile = FileName(conv.result_dir.empty()
 371                         ? changeExtension(from_file.absFilename(), conv.To->extension())
 372                         : addName(subst(conv.result_dir,
 373                                         token_base, from_base),
 374                                   subst(conv.result_file,
 375                                         token_base, onlyFilename(from_base))));
 376
 377                 // if input and output files are equal, we use a
 378                 // temporary file as intermediary (JMarc)
 379                 FileName real_outfile;
 380                 if (outfile == infile) {
 381                         real_outfile = infile;
 382                         outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 383                 }
 384
 385                 if (conv.latex) {
 386                         run_latex = true;
 387                         string const command = subst(conv.command, token_from, "");
 388                         LYXERR(Debug::FILES) << "Running " << command << endl;
 389                         if (!runLaTeX(*buffer, command, runparams, errorList))
 390                                 return false;
 391                 } else {
 392                         if (conv.need_aux && !run_latex
 393                             && !latex_command_.empty()) {
 394                                 LYXERR(Debug::FILES)
 395                                         << "Running " << latex_command_
 396                                         << " to update aux file"<<  endl;
 397                                 runLaTeX(*buffer, latex_command_, runparams, errorList);
 398                         }
 399
 400                         // FIXME UNICODE
 401                         string const infile2 = (conv.original_dir)
 402                                 ? infile.absFilename() : to_utf8(makeRelPath(from_utf8(infile.absFilename()),
 403                                                                              from_utf8(path)));
 404                         string const outfile2 = (conv.original_dir)
 405                                 ? outfile.absFilename() : to_utf8(makeRelPath(from_utf8(outfile.absFilename()),
 406                                                                               from_utf8(path)));
 407
 408                         string command = conv.command;
 409                         command = subst(command, token_from, quoteName(infile2));
 410                         command = subst(command, token_base, quoteName(from_base));
 411                         command = subst(command, token_to, quoteName(outfile2));
 412                         command = libScriptSearch(command);
 413
 414                         if (!conv.parselog.empty())
 415                                 command += " 2> " + quoteName(infile2 + ".out");
 416
 417                         if (conv.from == "dvi" && conv.to == "ps")
 418                                 command = add_options(command,
 419                                                       buffer->params().dvips_options());
 420                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 421                                 command = add_options(command,
 422                                                       dvipdfm_options(buffer->params()));
 423
 424                         LYXERR(Debug::FILES) << "Calling " << command << endl;
 425                         if (buffer)
 426                                 buffer->message(_("Executing command: ")
 427                                 + from_utf8(command));
 428
 429                         Systemcall::Starttype const type = (dummy)
 430                                 ? Systemcall::DontWait : Systemcall::Wait;
 431                         Systemcall one;
 432                         int res;
 433                         if (conv.original_dir) {
 434                                 Path p(buffer->filePath());
 435                                 res = one.startscript(type,
 436                                         to_filesystem8bit(from_utf8(command)));
 437                         } else
 438                                 res = one.startscript(type,
 439                                         to_filesystem8bit(from_utf8(command)));
 440
 441                         if (!real_outfile.empty()) {
 442                                 Mover const & mover = getMover(conv.to);
 443                                 if (!mover.rename(outfile, real_outfile))
 444                                         res = -1;
 445                                 else
 446                                         LYXERR(Debug::FILES)
 447                                                 << "renaming file " << outfile
 448                                                 << " to " << real_outfile
 449                                                 << endl;
 450                                 // Finally, don't forget to tell any future
 451                                 // converters to use the renamed file...
 452                                 outfile = real_outfile;
 453                         }
 454
 455                         if (!conv.parselog.empty()) {
 456                                 string const logfile =  infile2 + ".log";
 457                                 string const script = libScriptSearch(conv.parselog);
 458                                 string const command2 = script +
 459                                         " < " + quoteName(infile2 + ".out") +
 460                                         " > " + quoteName(logfile);
 461                                 one.startscript(Systemcall::Wait,
 462                                         to_filesystem8bit(from_utf8(command2)));
 463                                 if (!scanLog(*buffer, command, makeAbsPath(logfile, path), errorList))
 464                                         return false;
 465                         }
 466
 467                         if (res) {
 468                                 if (conv.to == "program") {
 469                                         Alert::error(_("Build errors"),
 470                                                 _("There were errors during the build process."));
 471                                 } else {
 472 // FIXME: this should go out of here. For example, here we cannot say if
 473 // it is a document (.lyx) or something else. Same goes for elsewhere.
 474                                         Alert::error(_("Cannot convert file"),
 475                                                 bformat(_("An error occurred whilst running %1$s"),
 476                                                 from_utf8(command.substr(0, 50))));
 477                                 }
 478                                 return false;
 479                         }
 480                 }
 481         }
 482
 483         Converter const & conv = converterlist_[edgepath.back()];
 484         if (conv.To->dummy())
 485                 return true;
 486
 487         if (!conv.result_dir.empty()) {
 488                 // The converter has put the file(s) in a directory.
 489                 // In this case we ignore the given to_file.
 490                 if (from_base != to_base) {
 491                         string const from = subst(conv.result_dir,
 492                                             token_base, from_base);
 493                         string const to = subst(conv.result_dir,
 494                                           token_base, to_base);
 495                         Mover const & mover = getMover(conv.from);
 496                         if (!mover.rename(FileName(from), FileName(to))) {
 497                                 Alert::error(_("Cannot convert file"),
 498                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 499                                                 from_utf8(from), from_utf8(to)));
 500                                 return false;
 501                         }
 502                 }
 503                 return true;
 504         } else {
 505                 if (conversionflags & try_cache)
 506                         ConverterCache::get().add(orig_from, to_format, outfile);
 507                 return move(conv.to, outfile, to_file, conv.latex);
 508         }
 509 }
 510
 511
 512 bool Converters::move(string const & fmt,
 513                       FileName const & from, FileName const & to, bool copy)
 514 {
 515         if (from == to)
 516                 return true;
 517
 518         bool no_errors = true;
 519         string const path = onlyPath(from.absFilename());
 520         string const base = onlyFilename(removeExtension(from.absFilename()));
 521         string const to_base = removeExtension(to.absFilename());
 522         string const to_extension = getExtension(to.absFilename());
 523
 524         vector<FileName> const files = dirList(FileName(path),
 525                         getExtension(from.absFilename()));
 526         for (vector<FileName>::const_iterator it = files.begin();
 527              it != files.end(); ++it) {
 528                 string const from2 = it->absFilename();
 529                 string const file2 = onlyFilename(from2);
 530                 if (prefixIs(file2, base)) {
 531                         string const to2 = changeExtension(
 532                                 to_base + file2.substr(base.length()),
 533                                 to_extension);
 534                         LYXERR(Debug::FILES) << "moving " << from2
 535                                              << " to " << to2 << endl;
 536
 537                         Mover const & mover = getMover(fmt);
 538                         bool const moved = copy
 539                                 ? mover.copy(*it, FileName(to2))
 540                                 : mover.rename(*it, FileName(to2));
 541                         if (!moved && no_errors) {
 542                                 Alert::error(_("Cannot convert file"),
 543                                         bformat(copy ?
 544                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 545                                                 _("Could not move a temporary file from %1$s to %2$s."),
 546                                                 from_utf8(from2), from_utf8(to2)));
 547                                 no_errors = false;
 548                         }
 549                 }
 550         }
 551         return no_errors;
 552 }
 553
 554
 555 bool Converters::formatIsUsed(string const & format)
 556 {
 557         ConverterList::const_iterator cit = converterlist_.begin();
 558         ConverterList::const_iterator end = converterlist_.end();
 559         for (; cit != end; ++cit) {
 560                 if (cit->from == format || cit->to == format)
 561                         return true;
 562         }
 563         return false;
 564 }
 565
 566
 567 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 568                          FileName const & filename, ErrorList & errorList)
 569 {
 570         OutputParams runparams(0);
 571         runparams.flavor = OutputParams::LATEX;
 572         LaTeX latex("", runparams, filename);
 573         TeXErrors terr;
 574         int const result = latex.scanLogFile(terr);
 575
 576         if (result & LaTeX::ERRORS)
 577                 bufferErrors(buffer, terr, errorList);
 578
 579         return true;
 580 }
 581
 582
 583 namespace {
 584
 585 class showMessage : public std::unary_function<docstring, void>, public boost::signals::trackable {
 586 public:
 587         showMessage(Buffer const & b) : buffer_(b) {};
 588         void operator()(docstring const & m) const
 589         {
 590                 buffer_.message(m);
 591         }
 592 private:
 593         Buffer const & buffer_;
 594 };
 595
 596 }
 597
 598
 599 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 600                           OutputParams const & runparams, ErrorList & errorList)
 601 {
 602         buffer.busy(true);
 603         buffer.message(_("Running LaTeX..."));
 604
 605         runparams.document_language = buffer.params().language->babel();
 606
 607         // do the LaTeX run(s)
 608         string const name = buffer.getLatexName();
 609         LaTeX latex(command, runparams, FileName(makeAbsPath(name)));
 610         TeXErrors terr;
 611         showMessage show(buffer);
 612         latex.message.connect(show);
 613         int const result = latex.run(terr);
 614
 615         if (result & LaTeX::ERRORS)
 616                 bufferErrors(buffer, terr, errorList);
 617
 618         // check return value from latex.run().
 619         if ((result & LaTeX::NO_LOGFILE)) {
 620                 docstring const str =
 621                         bformat(_("LaTeX did not run successfully. "
 622                                                "Additionally, LyX could not locate "
 623                                                "the LaTeX log %1$s."), from_utf8(name));
 624                 Alert::error(_("LaTeX failed"), str);
 625         } else if (result & LaTeX::NO_OUTPUT) {
 626                 Alert::warning(_("Output is empty"),
 627                                _("An empty output file was generated."));
 628         }
 629
 630
 631         buffer.busy(false);
 632
 633         int const ERROR_MASK =
 634                         LaTeX::NO_LOGFILE |
 635                         LaTeX::ERRORS |
 636                         LaTeX::NO_OUTPUT;
 637
 638         return (result & ERROR_MASK) == 0;
 639
 640 }
 641
 642
 643
 644 void Converters::buildGraph()
 645 {
 646         G_.init(formats.size());
 647         ConverterList::iterator beg = converterlist_.begin();
 648         ConverterList::iterator const end = converterlist_.end();
 649         for (ConverterList::iterator it = beg; it != end ; ++it) {
 650                 int const s = formats.getNumber(it->from);
 651                 int const t = formats.getNumber(it->to);
 652                 G_.addEdge(s,t);
 653         }
 654 }
 655
 656
 657 std::vector<Format const *> const
 658 Converters::intToFormat(std::vector<int> const & input)
 659 {
 660         vector<Format const *> result(input.size());
 661
 662         vector<int>::const_iterator it = input.begin();
 663         vector<int>::const_iterator const end = input.end();
 664         vector<Format const *>::iterator rit = result.begin();
 665         for ( ; it != end; ++it, ++rit) {
 666                 *rit = &formats.get(*it);
 667         }
 668         return result;
 669 }
 670
 671
 672 vector<Format const *> const
 673 Converters::getReachableTo(string const & target, bool const clear_visited)
 674 {
 675         vector<int> const & reachablesto =
 676                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 677
 678         return intToFormat(reachablesto);
 679 }
 680
 681
 682 vector<Format const *> const
 683 Converters::getReachable(string const & from, bool const only_viewable,
 684                          bool const clear_visited)
 685 {
 686         vector<int> const & reachables =
 687                 G_.getReachable(formats.getNumber(from),
 688                                 only_viewable,
 689                                 clear_visited);
 690
 691         return intToFormat(reachables);
 692 }
 693
 694
 695 bool Converters::isReachable(string const & from, string const & to)
 696 {
 697         return G_.isReachable(formats.getNumber(from),
 698                               formats.getNumber(to));
 699 }
 700
 701
 702 Graph::EdgePath const
 703 Converters::getPath(string const & from, string const & to)
 704 {
 705         return G_.getPath(formats.getNumber(from),
 706                           formats.getNumber(to));
 707 }
 708
 709 } // namespace lyx