src/Converter.cpp

   1 /**
   2  * \file Converter.cpp
   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 "ErrorList.h"
  21 #include "Format.h"
  22 #include "gettext.h"
  23 #include "Language.h"
  24 #include "LaTeX.h"
  25 #include "Mover.h"
  26
  27 #include "frontends/alert.h"
  28
  29 #include "support/filetools.h"
  30 #include "support/lyxlib.h"
  31 #include "support/os.h"
  32 #include "support/Path.h"
  33 #include "support/Systemcall.h"
  34
  35
  36 namespace lyx {
  37
  38 using support::addName;
  39 using support::bformat;
  40 using support::changeExtension;
  41 using support::compare_ascii_no_case;
  42 using support::contains;
  43 using support::dirList;
  44 using support::FileName;
  45 using support::getExtension;
  46 using support::isFileReadable;
  47 using support::libFileSearch;
  48 using support::libScriptSearch;
  49 using support::makeAbsPath;
  50 using support::makeRelPath;
  51 using support::onlyFilename;
  52 using support::onlyPath;
  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 const path(onlyPath(from_file.absFilename()));
 352         // Prevent the compiler from optimizing away p
 353         FileName pp(path);
 354         support::Path p(pp);
 355
 356         // empty the error list before any new conversion takes place.
 357         errorList.clear();
 358
 359         bool run_latex = false;
 360         string from_base = changeExtension(from_file.absFilename(), "");
 361         string to_base = changeExtension(to_file.absFilename(), "");
 362         FileName infile;
 363         FileName outfile = from_file;
 364         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 365              cit != edgepath.end(); ++cit) {
 366                 Converter const & conv = converterlist_[*cit];
 367                 bool dummy = conv.To->dummy() && conv.to != "program";
 368                 if (!dummy)
 369                         LYXERR(Debug::FILES) << "Converting from  "
 370                                << conv.from << " to " << conv.to << endl;
 371                 infile = outfile;
 372                 outfile = FileName(conv.result_dir.empty()
 373                         ? changeExtension(from_file.absFilename(), conv.To->extension())
 374                         : addName(subst(conv.result_dir,
 375                                         token_base, from_base),
 376                                   subst(conv.result_file,
 377                                         token_base, onlyFilename(from_base))));
 378
 379                 // if input and output files are equal, we use a
 380                 // temporary file as intermediary (JMarc)
 381                 FileName real_outfile;
 382                 if (outfile == infile) {
 383                         real_outfile = infile;
 384                         outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 385                 }
 386
 387                 if (conv.latex) {
 388                         run_latex = true;
 389                         string const command = subst(conv.command, token_from, "");
 390                         LYXERR(Debug::FILES) << "Running " << command << endl;
 391                         if (!runLaTeX(*buffer, command, runparams, errorList))
 392                                 return false;
 393                 } else {
 394                         if (conv.need_aux && !run_latex
 395                             && !latex_command_.empty()) {
 396                                 LYXERR(Debug::FILES)
 397                                         << "Running " << latex_command_
 398                                         << " to update aux file"<<  endl;
 399                                 runLaTeX(*buffer, latex_command_, runparams, errorList);
 400                         }
 401
 402                         // FIXME UNICODE
 403                         string const infile2 = (conv.original_dir)
 404                                 ? infile.absFilename() : to_utf8(makeRelPath(from_utf8(infile.absFilename()),
 405                                                                              from_utf8(path)));
 406                         string const outfile2 = (conv.original_dir)
 407                                 ? outfile.absFilename() : to_utf8(makeRelPath(from_utf8(outfile.absFilename()),
 408                                                                               from_utf8(path)));
 409
 410                         string command = conv.command;
 411                         command = subst(command, token_from, quoteName(infile2));
 412                         command = subst(command, token_base, quoteName(from_base));
 413                         command = subst(command, token_to, quoteName(outfile2));
 414                         command = libScriptSearch(command);
 415
 416                         if (!conv.parselog.empty())
 417                                 command += " 2> " + quoteName(infile2 + ".out");
 418
 419                         if (conv.from == "dvi" && conv.to == "ps")
 420                                 command = add_options(command,
 421                                                       buffer->params().dvips_options());
 422                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 423                                 command = add_options(command,
 424                                                       dvipdfm_options(buffer->params()));
 425
 426                         LYXERR(Debug::FILES) << "Calling " << command << endl;
 427                         if (buffer)
 428                                 buffer->message(_("Executing command: ")
 429                                 + from_utf8(command));
 430
 431                         Systemcall::Starttype const type = (dummy)
 432                                 ? Systemcall::DontWait : Systemcall::Wait;
 433                         Systemcall one;
 434                         int res;
 435                         if (conv.original_dir) {
 436                                 FileName path(buffer->filePath());
 437                                 support::Path p(path);
 438                                 res = one.startscript(type,
 439                                         to_filesystem8bit(from_utf8(command)));
 440                         } else
 441                                 res = one.startscript(type,
 442                                         to_filesystem8bit(from_utf8(command)));
 443
 444                         if (!real_outfile.empty()) {
 445                                 Mover const & mover = getMover(conv.to);
 446                                 if (!mover.rename(outfile, real_outfile))
 447                                         res = -1;
 448                                 else
 449                                         LYXERR(Debug::FILES)
 450                                                 << "renaming file " << outfile
 451                                                 << " to " << real_outfile
 452                                                 << endl;
 453                                 // Finally, don't forget to tell any future
 454                                 // converters to use the renamed file...
 455                                 outfile = real_outfile;
 456                         }
 457
 458                         if (!conv.parselog.empty()) {
 459                                 string const logfile =  infile2 + ".log";
 460                                 string const script = libScriptSearch(conv.parselog);
 461                                 string const command2 = script +
 462                                         " < " + quoteName(infile2 + ".out") +
 463                                         " > " + quoteName(logfile);
 464                                 one.startscript(Systemcall::Wait,
 465                                         to_filesystem8bit(from_utf8(command2)));
 466                                 if (!scanLog(*buffer, command, makeAbsPath(logfile, path), errorList))
 467                                         return false;
 468                         }
 469
 470                         if (res) {
 471                                 if (conv.to == "program") {
 472                                         Alert::error(_("Build errors"),
 473                                                 _("There were errors during the build process."));
 474                                 } else {
 475 // FIXME: this should go out of here. For example, here we cannot say if
 476 // it is a document (.lyx) or something else. Same goes for elsewhere.
 477                                         Alert::error(_("Cannot convert file"),
 478                                                 bformat(_("An error occurred whilst running %1$s"),
 479                                                 from_utf8(command.substr(0, 50))));
 480                                 }
 481                                 return false;
 482                         }
 483                 }
 484         }
 485
 486         Converter const & conv = converterlist_[edgepath.back()];
 487         if (conv.To->dummy())
 488                 return true;
 489
 490         if (!conv.result_dir.empty()) {
 491                 // The converter has put the file(s) in a directory.
 492                 // In this case we ignore the given to_file.
 493                 if (from_base != to_base) {
 494                         string const from = subst(conv.result_dir,
 495                                             token_base, from_base);
 496                         string const to = subst(conv.result_dir,
 497                                           token_base, to_base);
 498                         Mover const & mover = getMover(conv.from);
 499                         if (!mover.rename(FileName(from), FileName(to))) {
 500                                 Alert::error(_("Cannot convert file"),
 501                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 502                                                 from_utf8(from), from_utf8(to)));
 503                                 return false;
 504                         }
 505                 }
 506                 return true;
 507         } else {
 508                 if (conversionflags & try_cache)
 509                         ConverterCache::get().add(orig_from, to_format, outfile);
 510                 return move(conv.to, outfile, to_file, conv.latex);
 511         }
 512 }
 513
 514
 515 bool Converters::move(string const & fmt,
 516                       FileName const & from, FileName const & to, bool copy)
 517 {
 518         if (from == to)
 519                 return true;
 520
 521         bool no_errors = true;
 522         string const path = onlyPath(from.absFilename());
 523         string const base = onlyFilename(removeExtension(from.absFilename()));
 524         string const to_base = removeExtension(to.absFilename());
 525         string const to_extension = getExtension(to.absFilename());
 526
 527         vector<FileName> const files = dirList(FileName(path),
 528                         getExtension(from.absFilename()));
 529         for (vector<FileName>::const_iterator it = files.begin();
 530              it != files.end(); ++it) {
 531                 string const from2 = it->absFilename();
 532                 string const file2 = onlyFilename(from2);
 533                 if (prefixIs(file2, base)) {
 534                         string const to2 = changeExtension(
 535                                 to_base + file2.substr(base.length()),
 536                                 to_extension);
 537                         LYXERR(Debug::FILES) << "moving " << from2
 538                                              << " to " << to2 << endl;
 539
 540                         Mover const & mover = getMover(fmt);
 541                         bool const moved = copy
 542                                 ? mover.copy(*it, FileName(to2))
 543                                 : mover.rename(*it, FileName(to2));
 544                         if (!moved && no_errors) {
 545                                 Alert::error(_("Cannot convert file"),
 546                                         bformat(copy ?
 547                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 548                                                 _("Could not move a temporary file from %1$s to %2$s."),
 549                                                 from_utf8(from2), from_utf8(to2)));
 550                                 no_errors = false;
 551                         }
 552                 }
 553         }
 554         return no_errors;
 555 }
 556
 557
 558 bool Converters::formatIsUsed(string const & format)
 559 {
 560         ConverterList::const_iterator cit = converterlist_.begin();
 561         ConverterList::const_iterator end = converterlist_.end();
 562         for (; cit != end; ++cit) {
 563                 if (cit->from == format || cit->to == format)
 564                         return true;
 565         }
 566         return false;
 567 }
 568
 569
 570 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 571                          FileName const & filename, ErrorList & errorList)
 572 {
 573         OutputParams runparams(0);
 574         runparams.flavor = OutputParams::LATEX;
 575         LaTeX latex("", runparams, filename);
 576         TeXErrors terr;
 577         int const result = latex.scanLogFile(terr);
 578
 579         if (result & LaTeX::ERRORS)
 580                 bufferErrors(buffer, terr, errorList);
 581
 582         return true;
 583 }
 584
 585
 586 namespace {
 587
 588 class showMessage : public std::unary_function<docstring, void>, public boost::signals::trackable {
 589 public:
 590         showMessage(Buffer const & b) : buffer_(b) {};
 591         void operator()(docstring const & m) const
 592         {
 593                 buffer_.message(m);
 594         }
 595 private:
 596         Buffer const & buffer_;
 597 };
 598
 599 }
 600
 601
 602 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 603                           OutputParams const & runparams, ErrorList & errorList)
 604 {
 605         buffer.busy(true);
 606         buffer.message(_("Running LaTeX..."));
 607
 608         runparams.document_language = buffer.params().language->babel();
 609
 610         // do the LaTeX run(s)
 611         string const name = buffer.getLatexName();
 612         LaTeX latex(command, runparams, FileName(makeAbsPath(name)));
 613         TeXErrors terr;
 614         showMessage show(buffer);
 615         latex.message.connect(show);
 616         int const result = latex.run(terr);
 617
 618         if (result & LaTeX::ERRORS)
 619                 bufferErrors(buffer, terr, errorList);
 620
 621         // check return value from latex.run().
 622         if ((result & LaTeX::NO_LOGFILE)) {
 623                 docstring const str =
 624                         bformat(_("LaTeX did not run successfully. "
 625                                                "Additionally, LyX could not locate "
 626                                                "the LaTeX log %1$s."), from_utf8(name));
 627                 Alert::error(_("LaTeX failed"), str);
 628         } else if (result & LaTeX::NO_OUTPUT) {
 629                 Alert::warning(_("Output is empty"),
 630                                _("An empty output file was generated."));
 631         }
 632
 633
 634         buffer.busy(false);
 635
 636         int const ERROR_MASK =
 637                         LaTeX::NO_LOGFILE |
 638                         LaTeX::ERRORS |
 639                         LaTeX::NO_OUTPUT;
 640
 641         return (result & ERROR_MASK) == 0;
 642
 643 }
 644
 645
 646
 647 void Converters::buildGraph()
 648 {
 649         G_.init(formats.size());
 650         ConverterList::iterator beg = converterlist_.begin();
 651         ConverterList::iterator const end = converterlist_.end();
 652         for (ConverterList::iterator it = beg; it != end ; ++it) {
 653                 int const s = formats.getNumber(it->from);
 654                 int const t = formats.getNumber(it->to);
 655                 G_.addEdge(s,t);
 656         }
 657 }
 658
 659
 660 std::vector<Format const *> const
 661 Converters::intToFormat(std::vector<int> const & input)
 662 {
 663         vector<Format const *> result(input.size());
 664
 665         vector<int>::const_iterator it = input.begin();
 666         vector<int>::const_iterator const end = input.end();
 667         vector<Format const *>::iterator rit = result.begin();
 668         for ( ; it != end; ++it, ++rit) {
 669                 *rit = &formats.get(*it);
 670         }
 671         return result;
 672 }
 673
 674
 675 vector<Format const *> const
 676 Converters::getReachableTo(string const & target, bool const clear_visited)
 677 {
 678         vector<int> const & reachablesto =
 679                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 680
 681         return intToFormat(reachablesto);
 682 }
 683
 684
 685 vector<Format const *> const
 686 Converters::getReachable(string const & from, bool const only_viewable,
 687                          bool const clear_visited)
 688 {
 689         vector<int> const & reachables =
 690                 G_.getReachable(formats.getNumber(from),
 691                                 only_viewable,
 692                                 clear_visited);
 693
 694         return intToFormat(reachables);
 695 }
 696
 697
 698 bool Converters::isReachable(string const & from, string const & to)
 699 {
 700         return G_.isReachable(formats.getNumber(from),
 701                               formats.getNumber(to));
 702 }
 703
 704
 705 Graph::EdgePath const
 706 Converters::getPath(string const & from, string const & to)
 707 {
 708         return G_.getPath(formats.getNumber(from),
 709                           formats.getNumber(to));
 710 }
 711
 712 } // namespace lyx