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/Package.h"
  33 #include "support/Path.h"
  34 #include "support/Systemcall.h"
  35
  36 using std::endl;
  37 using std::find_if;
  38 using std::string;
  39 using std::vector;
  40 using std::distance;
  41
  42
  43 namespace lyx {
  44
  45 using support::addName;
  46 using support::bformat;
  47 using support::changeExtension;
  48 using support::compare_ascii_no_case;
  49 using support::contains;
  50 using support::dirList;
  51 using support::FileName;
  52 using support::getExtension;
  53 using support::libFileSearch;
  54 using support::libScriptSearch;
  55 using support::makeAbsPath;
  56 using support::makeRelPath;
  57 using support::onlyFilename;
  58 using support::onlyPath;
  59 using support::package;
  60 using support::prefixIs;
  61 using support::quoteName;
  62 using support::removeExtension;
  63 using support::split;
  64 using support::subst;
  65 using support::Systemcall;
  66
  67 namespace Alert = lyx::frontend::Alert;
  68
  69
  70 namespace {
  71
  72 string const token_from("$$i");
  73 string const token_base("$$b");
  74 string const token_to("$$o");
  75 string const token_path("$$p");
  76
  77
  78
  79 string const add_options(string const & command, string const & options)
  80 {
  81         string head;
  82         string const tail = split(command, head, ' ');
  83         return head + ' ' + options + ' ' + tail;
  84 }
  85
  86
  87 string const dvipdfm_options(BufferParams const & bp)
  88 {
  89         string result;
  90
  91         if (bp.papersize != PAPER_CUSTOM) {
  92                 string const paper_size = bp.paperSizeName();
  93                 if (paper_size != "b5" && paper_size != "foolscap")
  94                         result = "-p "+ paper_size;
  95
  96                 if (bp.orientation == ORIENTATION_LANDSCAPE)
  97                         result += " -l";
  98         }
  99
 100         return result;
 101 }
 102
 103
 104 class ConverterEqual : public std::binary_function<string, string, bool> {
 105 public:
 106         ConverterEqual(string const & from, string const & to)
 107                 : from_(from), to_(to) {}
 108         bool operator()(Converter const & c) const {
 109                 return c.from == from_ && c.to == to_;
 110         }
 111 private:
 112         string const from_;
 113         string const to_;
 114 };
 115
 116 } // namespace anon
 117
 118
 119 Converter::Converter(string const & f, string const & t,
 120                      string const & c, string const & l)
 121         : from(f), to(t), command(c), flags(l),
 122           From(0), To(0), latex(false), xml(false),
 123           need_aux(false)
 124 {}
 125
 126
 127 void Converter::readFlags()
 128 {
 129         string flag_list(flags);
 130         while (!flag_list.empty()) {
 131                 string flag_name, flag_value;
 132                 flag_list = split(flag_list, flag_value, ',');
 133                 flag_value = split(flag_value, flag_name, '=');
 134                 if (flag_name == "latex")
 135                         latex = true;
 136                 else if (flag_name == "xml")
 137                         xml = true;
 138                 else if (flag_name == "needaux")
 139                         need_aux = true;
 140                 else if (flag_name == "resultdir")
 141                         result_dir = (flag_value.empty())
 142                                 ? token_base : flag_value;
 143                 else if (flag_name == "resultfile")
 144                         result_file = flag_value;
 145                 else if (flag_name == "parselog")
 146                         parselog = flag_value;
 147         }
 148         if (!result_dir.empty() && result_file.empty())
 149                 result_file = "index." + formats.extension(to);
 150         //if (!contains(command, token_from))
 151         //      latex = true;
 152 }
 153
 154
 155 bool operator<(Converter const & a, Converter const & b)
 156 {
 157         // use the compare_ascii_no_case instead of compare_no_case,
 158         // because in turkish, 'i' is not the lowercase version of 'I',
 159         // and thus turkish locale breaks parsing of tags.
 160         int const i = compare_ascii_no_case(a.From->prettyname(),
 161                                             b.From->prettyname());
 162         if (i == 0)
 163                 return compare_ascii_no_case(a.To->prettyname(),
 164                                              b.To->prettyname()) < 0;
 165         else
 166                 return i < 0;
 167 }
 168
 169
 170 Converter const * Converters::getConverter(string const & from,
 171                                             string const & to) const
 172 {
 173         ConverterList::const_iterator const cit =
 174                 find_if(converterlist_.begin(), converterlist_.end(),
 175                         ConverterEqual(from, to));
 176         if (cit != converterlist_.end())
 177                 return &(*cit);
 178         else
 179                 return 0;
 180 }
 181
 182
 183 int Converters::getNumber(string const & from, string const & to) const
 184 {
 185         ConverterList::const_iterator const cit =
 186                 find_if(converterlist_.begin(), converterlist_.end(),
 187                         ConverterEqual(from, to));
 188         if (cit != converterlist_.end())
 189                 return distance(converterlist_.begin(), cit);
 190         else
 191                 return -1;
 192 }
 193
 194
 195 void Converters::add(string const & from, string const & to,
 196                      string const & command, string const & flags)
 197 {
 198         formats.add(from);
 199         formats.add(to);
 200         ConverterList::iterator it = find_if(converterlist_.begin(),
 201                                              converterlist_.end(),
 202                                              ConverterEqual(from , to));
 203
 204         Converter converter(from, to, command, flags);
 205         if (it != converterlist_.end() && !flags.empty() && flags[0] == '*') {
 206                 converter = *it;
 207                 converter.command = command;
 208                 converter.flags = flags;
 209         }
 210         converter.readFlags();
 211
 212         if (converter.latex && (latex_command_.empty() || to == "dvi"))
 213                 latex_command_ = subst(command, token_from, "");
 214         // If we have both latex & pdflatex, we set latex_command to latex.
 215         // The latex_command is used to update the .aux file when running
 216         // a converter that uses it.
 217
 218         if (it == converterlist_.end()) {
 219                 converterlist_.push_back(converter);
 220         } else {
 221                 converter.From = it->From;
 222                 converter.To = it->To;
 223                 *it = converter;
 224         }
 225 }
 226
 227
 228 void Converters::erase(string const & from, string const & to)
 229 {
 230         ConverterList::iterator const it =
 231                 find_if(converterlist_.begin(),
 232                         converterlist_.end(),
 233                         ConverterEqual(from, to));
 234         if (it != converterlist_.end())
 235                 converterlist_.erase(it);
 236 }
 237
 238
 239 // This method updates the pointers From and To in all the converters.
 240 // The code is not very efficient, but it doesn't matter as the number
 241 // of formats and converters is small.
 242 // Furthermore, this method is called only on startup, or after
 243 // adding/deleting a format in FormPreferences (the latter calls can be
 244 // eliminated if the formats in the Formats class are stored using a map or
 245 // a list (instead of a vector), but this will cause other problems).
 246 void Converters::update(Formats const & formats)
 247 {
 248         ConverterList::iterator it = converterlist_.begin();
 249         ConverterList::iterator end = converterlist_.end();
 250         for (; it != end; ++it) {
 251                 it->From = formats.getFormat(it->from);
 252                 it->To = formats.getFormat(it->to);
 253         }
 254 }
 255
 256
 257 // This method updates the pointers From and To in the last converter.
 258 // It is called when adding a new converter in FormPreferences
 259 void Converters::updateLast(Formats const & formats)
 260 {
 261         if (converterlist_.begin() != converterlist_.end()) {
 262                 ConverterList::iterator it = converterlist_.end() - 1;
 263                 it->From = formats.getFormat(it->from);
 264                 it->To = formats.getFormat(it->to);
 265         }
 266 }
 267
 268
 269 void Converters::sort()
 270 {
 271         std::sort(converterlist_.begin(), converterlist_.end());
 272 }
 273
 274
 275 OutputParams::FLAVOR Converters::getFlavor(Graph::EdgePath const & path)
 276 {
 277         for (Graph::EdgePath::const_iterator cit = path.begin();
 278              cit != path.end(); ++cit) {
 279                 Converter const & conv = converterlist_[*cit];
 280                 if (conv.latex)
 281                         if (contains(conv.to, "pdf"))
 282                                 return OutputParams::PDFLATEX;
 283                 if (conv.xml)
 284                         return OutputParams::XML;
 285         }
 286         return OutputParams::LATEX;
 287 }
 288
 289
 290 bool Converters::convert(Buffer const * buffer,
 291                          FileName const & from_file, FileName const & to_file,
 292                          FileName const & orig_from,
 293                          string const & from_format, string const & to_format,
 294                          ErrorList & errorList, int conversionflags)
 295 {
 296         if (from_format == to_format)
 297                 return move(from_format, from_file, to_file, false);
 298
 299         if ((conversionflags & try_cache) &&
 300             ConverterCache::get().inCache(orig_from, to_format))
 301                 return ConverterCache::get().copy(orig_from, to_format, to_file);
 302
 303         Graph::EdgePath edgepath = getPath(from_format, to_format);
 304         if (edgepath.empty()) {
 305                 if (conversionflags & try_default) {
 306                         // if no special converter defined, then we take the
 307                         // default one from ImageMagic.
 308                         string const from_ext = from_format.empty() ?
 309                                 getExtension(from_file.absFilename()) :
 310                                 formats.extension(from_format);
 311                         string const to_ext = formats.extension(to_format);
 312                         string const command =
 313                                 support::os::python() + ' ' +
 314                                 quoteName(libFileSearch("scripts", "convertDefault.py").toFilesystemEncoding()) +
 315                                 ' ' +
 316                                 quoteName(from_ext + ':' + from_file.toFilesystemEncoding()) +
 317                                 ' ' +
 318                                 quoteName(to_ext + ':' + to_file.toFilesystemEncoding());
 319                         LYXERR(Debug::FILES)
 320                                 << "No converter defined! "
 321                                    "I use convertDefault.py:\n\t"
 322                                 << command << endl;
 323                         Systemcall one;
 324                         one.startscript(Systemcall::Wait, command);
 325                         if (to_file.isFileReadable()) {
 326                                 if (conversionflags & try_cache)
 327                                         ConverterCache::get().add(orig_from,
 328                                                         to_format, to_file);
 329                                 return true;
 330                         }
 331                 }
 332                 Alert::error(_("Cannot convert file"),
 333                              bformat(_("No information for converting %1$s "
 334                                                     "format files to %2$s.\n"
 335                                                     "Define a converter in the preferences."),
 336                                                         from_ascii(from_format), from_ascii(to_format)));
 337                 return false;
 338         }
 339
 340         // buffer is only invalid for importing, and then runparams is not
 341         // used anyway.
 342         OutputParams runparams(buffer ? &buffer->params().encoding() : 0);
 343         runparams.flavor = getFlavor(edgepath);
 344
 345         // Some converters (e.g. lilypond) can only output files to the
 346         // current directory, so we need to change the current directory.
 347         // This has the added benefit that all other files that may be
 348         // generated by the converter are deleted when LyX closes and do not
 349         // clutter the real working directory.
 350         string const path(onlyPath(from_file.absFilename()));
 351         // Prevent the compiler from optimizing away p
 352         FileName pp(path);
 353         support::Path p(pp);
 354
 355         // empty the error list before any new conversion takes place.
 356         errorList.clear();
 357
 358         bool run_latex = false;
 359         string from_base = changeExtension(from_file.absFilename(), "");
 360         string to_base = changeExtension(to_file.absFilename(), "");
 361         FileName infile;
 362         FileName outfile = from_file;
 363         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 364              cit != edgepath.end(); ++cit) {
 365                 Converter const & conv = converterlist_[*cit];
 366                 bool dummy = conv.To->dummy() && conv.to != "program";
 367                 if (!dummy) {
 368                         LYXERR(Debug::FILES) << "Converting from  "
 369                                << conv.from << " to " << conv.to << endl;
 370                 }
 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                         // when importing, a buffer does not necessarily exist
 385                         if (buffer)
 386                                 outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 387                         else
 388                                 outfile = FileName(addName(package().temp_dir().absFilename(),
 389                                                    "tmpfile.out"));
 390                 }
 391
 392                 if (conv.latex) {
 393                         run_latex = true;
 394                         string const command = subst(conv.command, token_from, "");
 395                         LYXERR(Debug::FILES) << "Running " << command << endl;
 396                         if (!runLaTeX(*buffer, command, runparams, errorList))
 397                                 return false;
 398                 } else {
 399                         if (conv.need_aux && !run_latex
 400                             && !latex_command_.empty()) {
 401                                 LYXERR(Debug::FILES)
 402                                         << "Running " << latex_command_
 403                                         << " to update aux file"<<  endl;
 404                                 runLaTeX(*buffer, latex_command_, runparams, errorList);
 405                         }
 406
 407                         // FIXME UNICODE
 408                         string const infile2 =
 409                                 to_utf8(makeRelPath(from_utf8(infile.absFilename()), from_utf8(path)));
 410                         string const outfile2 =
 411                                 to_utf8(makeRelPath(from_utf8(outfile.absFilename()), from_utf8(path)));
 412
 413                         string command = conv.command;
 414                         command = subst(command, token_from, quoteName(infile2));
 415                         command = subst(command, token_base, quoteName(from_base));
 416                         command = subst(command, token_to, quoteName(outfile2));
 417                         command = libScriptSearch(command);
 418
 419                         if (!conv.parselog.empty())
 420                                 command += " 2> " + quoteName(infile2 + ".out");
 421
 422                         if (conv.from == "dvi" && conv.to == "ps")
 423                                 command = add_options(command,
 424                                                       buffer->params().dvips_options());
 425                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 426                                 command = add_options(command,
 427                                                       dvipdfm_options(buffer->params()));
 428
 429                         LYXERR(Debug::FILES) << "Calling " << command << endl;
 430                         if (buffer)
 431                                 buffer->message(_("Executing command: ")
 432                                 + from_utf8(command));
 433
 434                         Systemcall one;
 435                         int res;
 436                         if (dummy) {
 437                                 res = one.startscript(Systemcall::DontWait,
 438                                         to_filesystem8bit(from_utf8(command)));
 439                                 // We're not waiting for the result, so we can't do anything
 440                                 // else here.
 441                         } else {
 442                                 res = one.startscript(Systemcall::Wait,
 443                                                 to_filesystem8bit(from_utf8(command)));
 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
 471                         if (res) {
 472                                 if (conv.to == "program") {
 473                                         Alert::error(_("Build errors"),
 474                                                 _("There were errors during the build process."));
 475                                 } else {
 476 // FIXME: this should go out of here. For example, here we cannot say if
 477 // it is a document (.lyx) or something else. Same goes for elsewhere.
 478                                         Alert::error(_("Cannot convert file"),
 479                                                 bformat(_("An error occurred whilst running %1$s"),
 480                                                 from_utf8(command.substr(0, 50))));
 481                                 }
 482                                 return false;
 483                         }
 484                 }
 485         }
 486
 487         Converter const & conv = converterlist_[edgepath.back()];
 488         if (conv.To->dummy())
 489                 return true;
 490
 491         if (!conv.result_dir.empty()) {
 492                 // The converter has put the file(s) in a directory.
 493                 // In this case we ignore the given to_file.
 494                 if (from_base != to_base) {
 495                         string const from = subst(conv.result_dir,
 496                                             token_base, from_base);
 497                         string const to = subst(conv.result_dir,
 498                                           token_base, to_base);
 499                         Mover const & mover = getMover(conv.from);
 500                         if (!mover.rename(FileName(from), FileName(to))) {
 501                                 Alert::error(_("Cannot convert file"),
 502                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 503                                                 from_utf8(from), from_utf8(to)));
 504                                 return false;
 505                         }
 506                 }
 507                 return true;
 508         } else {
 509                 if (conversionflags & try_cache)
 510                         ConverterCache::get().add(orig_from, to_format, outfile);
 511                 return move(conv.to, outfile, to_file, conv.latex);
 512         }
 513 }
 514
 515
 516 bool Converters::move(string const & fmt,
 517                       FileName const & from, FileName const & to, bool copy)
 518 {
 519         if (from == to)
 520                 return true;
 521
 522         bool no_errors = true;
 523         string const path = onlyPath(from.absFilename());
 524         string const base = onlyFilename(removeExtension(from.absFilename()));
 525         string const to_base = removeExtension(to.absFilename());
 526         string const to_extension = getExtension(to.absFilename());
 527
 528         vector<FileName> const files = dirList(FileName(path),
 529                         getExtension(from.absFilename()));
 530         for (vector<FileName>::const_iterator it = files.begin();
 531              it != files.end(); ++it) {
 532                 string const from2 = it->absFilename();
 533                 string const file2 = onlyFilename(from2);
 534                 if (prefixIs(file2, base)) {
 535                         string const to2 = changeExtension(
 536                                 to_base + file2.substr(base.length()),
 537                                 to_extension);
 538                         LYXERR(Debug::FILES) << "moving " << from2
 539                                              << " to " << to2 << endl;
 540
 541                         Mover const & mover = getMover(fmt);
 542                         bool const moved = copy
 543                                 ? mover.copy(*it, FileName(to2))
 544                                 : mover.rename(*it, FileName(to2));
 545                         if (!moved && no_errors) {
 546                                 Alert::error(_("Cannot convert file"),
 547                                         bformat(copy ?
 548                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 549                                                 _("Could not move a temporary file from %1$s to %2$s."),
 550                                                 from_utf8(from2), from_utf8(to2)));
 551                                 no_errors = false;
 552                         }
 553                 }
 554         }
 555         return no_errors;
 556 }
 557
 558
 559 bool Converters::formatIsUsed(string const & format)
 560 {
 561         ConverterList::const_iterator cit = converterlist_.begin();
 562         ConverterList::const_iterator end = converterlist_.end();
 563         for (; cit != end; ++cit) {
 564                 if (cit->from == format || cit->to == format)
 565                         return true;
 566         }
 567         return false;
 568 }
 569
 570
 571 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 572                          FileName const & filename, ErrorList & errorList)
 573 {
 574         OutputParams runparams(0);
 575         runparams.flavor = OutputParams::LATEX;
 576         LaTeX latex("", runparams, filename);
 577         TeXErrors terr;
 578         int const result = latex.scanLogFile(terr);
 579
 580         if (result & LaTeX::ERRORS)
 581                 buffer.bufferErrors(terr, errorList);
 582
 583         return true;
 584 }
 585
 586
 587 namespace {
 588
 589 class ShowMessage
 590         : public boost::signals::trackable {
 591 public:
 592         ShowMessage(Buffer const & b) : buffer_(b) {}
 593         void operator()(docstring const & msg) const { buffer_.message(msg); }
 594 private:
 595         Buffer const & buffer_;
 596 };
 597
 598 }
 599
 600
 601 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 602                           OutputParams const & runparams, ErrorList & errorList)
 603 {
 604         buffer.setBusy(true);
 605         buffer.message(_("Running LaTeX..."));
 606
 607         runparams.document_language = buffer.params().language->babel();
 608
 609         // do the LaTeX run(s)
 610         string const name = buffer.latexName();
 611         LaTeX latex(command, runparams, FileName(makeAbsPath(name)));
 612         TeXErrors terr;
 613         ShowMessage show(buffer);
 614         latex.message.connect(show);
 615         int const result = latex.run(terr);
 616
 617         if (result & LaTeX::ERRORS)
 618                 buffer.bufferErrors(terr, errorList);
 619
 620         // check return value from latex.run().
 621         if ((result & LaTeX::NO_LOGFILE)) {
 622                 docstring const str =
 623                         bformat(_("LaTeX did not run successfully. "
 624                                                "Additionally, LyX could not locate "
 625                                                "the LaTeX log %1$s."), from_utf8(name));
 626                 Alert::error(_("LaTeX failed"), str);
 627         } else if (result & LaTeX::NO_OUTPUT) {
 628                 Alert::warning(_("Output is empty"),
 629                                _("An empty output file was generated."));
 630         }
 631
 632
 633         buffer.setBusy(false);
 634
 635         int const ERROR_MASK =
 636                         LaTeX::NO_LOGFILE |
 637                         LaTeX::ERRORS |
 638                         LaTeX::NO_OUTPUT;
 639
 640         return (result & ERROR_MASK) == 0;
 641
 642 }
 643
 644
 645
 646 void Converters::buildGraph()
 647 {
 648         G_.init(formats.size());
 649         ConverterList::iterator beg = converterlist_.begin();
 650         ConverterList::iterator const end = converterlist_.end();
 651         for (ConverterList::iterator it = beg; it != end ; ++it) {
 652                 int const s = formats.getNumber(it->from);
 653                 int const t = formats.getNumber(it->to);
 654                 G_.addEdge(s,t);
 655         }
 656 }
 657
 658
 659 std::vector<Format const *> const
 660 Converters::intToFormat(std::vector<int> const & input)
 661 {
 662         vector<Format const *> result(input.size());
 663
 664         vector<int>::const_iterator it = input.begin();
 665         vector<int>::const_iterator const end = input.end();
 666         vector<Format const *>::iterator rit = result.begin();
 667         for ( ; it != end; ++it, ++rit) {
 668                 *rit = &formats.get(*it);
 669         }
 670         return result;
 671 }
 672
 673
 674 vector<Format const *> const
 675 Converters::getReachableTo(string const & target, bool const clear_visited)
 676 {
 677         vector<int> const & reachablesto =
 678                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 679
 680         return intToFormat(reachablesto);
 681 }
 682
 683
 684 vector<Format const *> const
 685 Converters::getReachable(string const & from, bool const only_viewable,
 686                          bool const clear_visited)
 687 {
 688         vector<int> const & reachables =
 689                 G_.getReachable(formats.getNumber(from),
 690                                 only_viewable,
 691                                 clear_visited);
 692
 693         return intToFormat(reachables);
 694 }
 695
 696
 697 bool Converters::isReachable(string const & from, string const & to)
 698 {
 699         return G_.isReachable(formats.getNumber(from),
 700                               formats.getNumber(to));
 701 }
 702
 703
 704 Graph::EdgePath Converters::getPath(string const & from, string const & to)
 705 {
 706         return G_.getPath(formats.getNumber(from),
 707                           formats.getNumber(to));
 708 }
 709
 710
 711 vector<Format const *> Converters::importableFormats()
 712 {
 713         vector<string> l = loaders();
 714         vector<Format const *> result = getReachableTo(l[0], true);
 715         for (vector<string>::const_iterator it = l.begin() + 1;
 716              it != l.end(); ++it) {
 717                 vector<Format const *> r = getReachableTo(*it, false);
 718                 result.insert(result.end(), r.begin(), r.end());
 719         }
 720         return result;
 721 }
 722
 723
 724 vector<string> Converters::loaders() const
 725 {
 726         vector<string> v;
 727         v.push_back("lyx");
 728         v.push_back("text");
 729         v.push_back("textparagraph");
 730         return v;
 731 }
 732
 733
 734 } // namespace lyx