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 "ErrorList.h"
  20 #include "Format.h"
  21 #include "Language.h"
  22 #include "LaTeX.h"
  23 #include "Mover.h"
  24
  25 #include "frontends/alert.h"
  26
  27 #include "support/debug.h"
  28 #include "support/filetools.h"
  29 #include "support/gettext.h"
  30 #include "support/lstrings.h"
  31 #include "support/lyxlib.h"
  32 #include "support/os.h"
  33 #include "support/Package.h"
  34 #include "support/Path.h"
  35 #include "support/Systemcall.h"
  36
  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::FileName;
  51 using support::getExtension;
  52 using support::libFileSearch;
  53 using support::libScriptSearch;
  54 using support::makeAbsPath;
  55 using support::makeRelPath;
  56 using support::onlyFilename;
  57 using support::onlyPath;
  58 using support::package;
  59 using support::prefixIs;
  60 using support::quoteName;
  61 using support::removeExtension;
  62 using support::split;
  63 using support::subst;
  64 using support::Systemcall;
  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 {
 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           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 == "needaux")
 138                         need_aux = true;
 139                 else if (flag_name == "resultdir")
 140                         result_dir = (flag_value.empty())
 141                                 ? token_base : flag_value;
 142                 else if (flag_name == "resultfile")
 143                         result_file = flag_value;
 144                 else if (flag_name == "parselog")
 145                         parselog = flag_value;
 146         }
 147         if (!result_dir.empty() && result_file.empty())
 148                 result_file = "index." + formats.extension(to);
 149         //if (!contains(command, token_from))
 150         //      latex = true;
 151 }
 152
 153
 154 bool operator<(Converter const & a, Converter const & b)
 155 {
 156         // use the compare_ascii_no_case instead of compare_no_case,
 157         // because in turkish, 'i' is not the lowercase version of 'I',
 158         // and thus turkish locale breaks parsing of tags.
 159         int const i = compare_ascii_no_case(a.From->prettyname(),
 160                                             b.From->prettyname());
 161         if (i == 0)
 162                 return compare_ascii_no_case(a.To->prettyname(),
 163                                              b.To->prettyname()) < 0;
 164         else
 165                 return i < 0;
 166 }
 167
 168
 169 Converter const * Converters::getConverter(string const & from,
 170                                             string const & to) const
 171 {
 172         ConverterList::const_iterator const cit =
 173                 find_if(converterlist_.begin(), converterlist_.end(),
 174                         ConverterEqual(from, to));
 175         if (cit != converterlist_.end())
 176                 return &(*cit);
 177         else
 178                 return 0;
 179 }
 180
 181
 182 int Converters::getNumber(string const & from, string const & to) const
 183 {
 184         ConverterList::const_iterator const cit =
 185                 find_if(converterlist_.begin(), converterlist_.end(),
 186                         ConverterEqual(from, to));
 187         if (cit != converterlist_.end())
 188                 return distance(converterlist_.begin(), cit);
 189         else
 190                 return -1;
 191 }
 192
 193
 194 void Converters::add(string const & from, string const & to,
 195                      string const & command, string const & flags)
 196 {
 197         formats.add(from);
 198         formats.add(to);
 199         ConverterList::iterator it = find_if(converterlist_.begin(),
 200                                              converterlist_.end(),
 201                                              ConverterEqual(from , to));
 202
 203         Converter converter(from, to, command, flags);
 204         if (it != converterlist_.end() && !flags.empty() && flags[0] == '*') {
 205                 converter = *it;
 206                 converter.command = command;
 207                 converter.flags = flags;
 208         }
 209         converter.readFlags();
 210
 211         if (converter.latex && (latex_command_.empty() || to == "dvi"))
 212                 latex_command_ = subst(command, token_from, "");
 213         // If we have both latex & pdflatex, we set latex_command to latex.
 214         // The latex_command is used to update the .aux file when running
 215         // a converter that uses it.
 216
 217         if (it == converterlist_.end()) {
 218                 converterlist_.push_back(converter);
 219         } else {
 220                 converter.From = it->From;
 221                 converter.To = it->To;
 222                 *it = converter;
 223         }
 224 }
 225
 226
 227 void Converters::erase(string const & from, string const & to)
 228 {
 229         ConverterList::iterator const it =
 230                 find_if(converterlist_.begin(),
 231                         converterlist_.end(),
 232                         ConverterEqual(from, to));
 233         if (it != converterlist_.end())
 234                 converterlist_.erase(it);
 235 }
 236
 237
 238 // This method updates the pointers From and To in all the converters.
 239 // The code is not very efficient, but it doesn't matter as the number
 240 // of formats and converters is small.
 241 // Furthermore, this method is called only on startup, or after
 242 // adding/deleting a format in FormPreferences (the latter calls can be
 243 // eliminated if the formats in the Formats class are stored using a map or
 244 // a list (instead of a vector), but this will cause other problems).
 245 void Converters::update(Formats const & formats)
 246 {
 247         ConverterList::iterator it = converterlist_.begin();
 248         ConverterList::iterator end = converterlist_.end();
 249         for (; it != end; ++it) {
 250                 it->From = formats.getFormat(it->from);
 251                 it->To = formats.getFormat(it->to);
 252         }
 253 }
 254
 255
 256 // This method updates the pointers From and To in the last converter.
 257 // It is called when adding a new converter in FormPreferences
 258 void Converters::updateLast(Formats const & formats)
 259 {
 260         if (converterlist_.begin() != converterlist_.end()) {
 261                 ConverterList::iterator it = converterlist_.end() - 1;
 262                 it->From = formats.getFormat(it->from);
 263                 it->To = formats.getFormat(it->to);
 264         }
 265 }
 266
 267
 268 void Converters::sort()
 269 {
 270         std::sort(converterlist_.begin(), converterlist_.end());
 271 }
 272
 273
 274 OutputParams::FLAVOR Converters::getFlavor(Graph::EdgePath const & path)
 275 {
 276         for (Graph::EdgePath::const_iterator cit = path.begin();
 277              cit != path.end(); ++cit) {
 278                 Converter const & conv = converterlist_[*cit];
 279                 if (conv.latex)
 280                         if (contains(conv.to, "pdf"))
 281                                 return OutputParams::PDFLATEX;
 282                 if (conv.xml)
 283                         return OutputParams::XML;
 284         }
 285         return OutputParams::LATEX;
 286 }
 287
 288
 289 bool Converters::convert(Buffer const * buffer,
 290                          FileName const & from_file, FileName const & to_file,
 291                          FileName const & orig_from,
 292                          string const & from_format, string const & to_format,
 293                          ErrorList & errorList, int conversionflags)
 294 {
 295         if (from_format == to_format)
 296                 return move(from_format, from_file, to_file, false);
 297
 298         if ((conversionflags & try_cache) &&
 299             ConverterCache::get().inCache(orig_from, to_format))
 300                 return ConverterCache::get().copy(orig_from, to_format, to_file);
 301
 302         Graph::EdgePath edgepath = getPath(from_format, to_format);
 303         if (edgepath.empty()) {
 304                 if (conversionflags & try_default) {
 305                         // if no special converter defined, then we take the
 306                         // default one from ImageMagic.
 307                         string const from_ext = from_format.empty() ?
 308                                 getExtension(from_file.absFilename()) :
 309                                 formats.extension(from_format);
 310                         string const to_ext = formats.extension(to_format);
 311                         string const command =
 312                                 support::os::python() + ' ' +
 313                                 quoteName(libFileSearch("scripts", "convertDefault.py").toFilesystemEncoding()) +
 314                                 ' ' +
 315                                 quoteName(from_ext + ':' + from_file.toFilesystemEncoding()) +
 316                                 ' ' +
 317                                 quoteName(to_ext + ':' + to_file.toFilesystemEncoding());
 318                         LYXERR(Debug::FILES, "No converter defined! "
 319                                    "I use convertDefault.py:\n\t" << command);
 320                         Systemcall one;
 321                         one.startscript(Systemcall::Wait, command);
 322                         if (to_file.isReadableFile()) {
 323                                 if (conversionflags & try_cache)
 324                                         ConverterCache::get().add(orig_from,
 325                                                         to_format, to_file);
 326                                 return true;
 327                         }
 328                 }
 329                 Alert::error(_("Cannot convert file"),
 330                              bformat(_("No information for converting %1$s "
 331                                                     "format files to %2$s.\n"
 332                                                     "Define a converter in the preferences."),
 333                                                         from_ascii(from_format), from_ascii(to_format)));
 334                 return false;
 335         }
 336
 337         // buffer is only invalid for importing, and then runparams is not
 338         // used anyway.
 339         OutputParams runparams(buffer ? &buffer->params().encoding() : 0);
 340         runparams.flavor = getFlavor(edgepath);
 341
 342         // Some converters (e.g. lilypond) can only output files to the
 343         // current directory, so we need to change the current directory.
 344         // This has the added benefit that all other files that may be
 345         // generated by the converter are deleted when LyX closes and do not
 346         // clutter the real working directory.
 347         string const path(onlyPath(from_file.absFilename()));
 348         // Prevent the compiler from optimizing away p
 349         FileName pp(path);
 350         support::PathChanger p(pp);
 351
 352         // empty the error list before any new conversion takes place.
 353         errorList.clear();
 354
 355         bool run_latex = false;
 356         string from_base = changeExtension(from_file.absFilename(), "");
 357         string to_base = changeExtension(to_file.absFilename(), "");
 358         FileName infile;
 359         FileName outfile = from_file;
 360         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 361              cit != edgepath.end(); ++cit) {
 362                 Converter const & conv = converterlist_[*cit];
 363                 bool dummy = conv.To->dummy() && conv.to != "program";
 364                 if (!dummy) {
 365                         LYXERR(Debug::FILES, "Converting from  "
 366                                << conv.from << " to " << conv.to);
 367                 }
 368                 infile = outfile;
 369                 outfile = FileName(conv.result_dir.empty()
 370                         ? changeExtension(from_file.absFilename(), conv.To->extension())
 371                         : addName(subst(conv.result_dir,
 372                                         token_base, from_base),
 373                                   subst(conv.result_file,
 374                                         token_base, onlyFilename(from_base))));
 375
 376                 // if input and output files are equal, we use a
 377                 // temporary file as intermediary (JMarc)
 378                 FileName real_outfile;
 379                 if (outfile == infile) {
 380                         real_outfile = infile;
 381                         // when importing, a buffer does not necessarily exist
 382                         if (buffer)
 383                                 outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 384                         else
 385                                 outfile = FileName(addName(package().temp_dir().absFilename(),
 386                                                    "tmpfile.out"));
 387                 }
 388
 389                 if (conv.latex) {
 390                         run_latex = true;
 391                         string const command = subst(conv.command, token_from, "");
 392                         LYXERR(Debug::FILES, "Running " << command);
 393                         if (!runLaTeX(*buffer, command, runparams, errorList))
 394                                 return false;
 395                 } else {
 396                         if (conv.need_aux && !run_latex
 397                             && !latex_command_.empty()) {
 398                                 LYXERR(Debug::FILES, "Running " << latex_command_
 399                                         << " to update aux file");
 400                                 runLaTeX(*buffer, latex_command_, runparams, errorList);
 401                         }
 402
 403                         // FIXME UNICODE
 404                         string const infile2 =
 405                                 to_utf8(makeRelPath(from_utf8(infile.absFilename()), from_utf8(path)));
 406                         string const outfile2 =
 407                                 to_utf8(makeRelPath(from_utf8(outfile.absFilename()), from_utf8(path)));
 408
 409                         string command = conv.command;
 410                         command = subst(command, token_from, quoteName(infile2));
 411                         command = subst(command, token_base, quoteName(from_base));
 412                         command = subst(command, token_to, quoteName(outfile2));
 413                         command = libScriptSearch(command);
 414
 415                         if (!conv.parselog.empty())
 416                                 command += " 2> " + quoteName(infile2 + ".out");
 417
 418                         if (conv.from == "dvi" && conv.to == "ps")
 419                                 command = add_options(command,
 420                                                       buffer->params().dvips_options());
 421                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 422                                 command = add_options(command,
 423                                                       dvipdfm_options(buffer->params()));
 424
 425                         LYXERR(Debug::FILES, "Calling " << command);
 426                         if (buffer)
 427                                 buffer->message(_("Executing command: ")
 428                                 + from_utf8(command));
 429
 430                         Systemcall one;
 431                         int res;
 432                         if (dummy) {
 433                                 res = one.startscript(Systemcall::DontWait,
 434                                         to_filesystem8bit(from_utf8(command)));
 435                                 // We're not waiting for the result, so we can't do anything
 436                                 // else here.
 437                         } else {
 438                                 res = one.startscript(Systemcall::Wait,
 439                                                 to_filesystem8bit(from_utf8(command)));
 440                                 if (!real_outfile.empty()) {
 441                                         Mover const & mover = getMover(conv.to);
 442                                         if (!mover.rename(outfile, real_outfile))
 443                                                 res = -1;
 444                                         else
 445                                                 LYXERR(Debug::FILES, "renaming file " << outfile
 446                                                         << " to " << real_outfile);
 447                                         // Finally, don't forget to tell any future
 448                                         // converters to use the renamed file...
 449                                         outfile = real_outfile;
 450                                 }
 451
 452                                 if (!conv.parselog.empty()) {
 453                                         string const logfile =  infile2 + ".log";
 454                                         string const script = libScriptSearch(conv.parselog);
 455                                         string const command2 = script +
 456                                                 " < " + quoteName(infile2 + ".out") +
 457                                                 " > " + quoteName(logfile);
 458                                         one.startscript(Systemcall::Wait,
 459                                                 to_filesystem8bit(from_utf8(command2)));
 460                                         if (!scanLog(*buffer, command, makeAbsPath(logfile, path), errorList))
 461                                                 return false;
 462                                 }
 463                         }
 464
 465                         if (res) {
 466                                 if (conv.to == "program") {
 467                                         Alert::error(_("Build errors"),
 468                                                 _("There were errors during the build process."));
 469                                 } else {
 470 // FIXME: this should go out of here. For example, here we cannot say if
 471 // it is a document (.lyx) or something else. Same goes for elsewhere.
 472                                         Alert::error(_("Cannot convert file"),
 473                                                 bformat(_("An error occurred whilst running %1$s"),
 474                                                 from_utf8(command.substr(0, 50))));
 475                                 }
 476                                 return false;
 477                         }
 478                 }
 479         }
 480
 481         Converter const & conv = converterlist_[edgepath.back()];
 482         if (conv.To->dummy())
 483                 return true;
 484
 485         if (!conv.result_dir.empty()) {
 486                 // The converter has put the file(s) in a directory.
 487                 // In this case we ignore the given to_file.
 488                 if (from_base != to_base) {
 489                         string const from = subst(conv.result_dir,
 490                                             token_base, from_base);
 491                         string const to = subst(conv.result_dir,
 492                                           token_base, to_base);
 493                         Mover const & mover = getMover(conv.from);
 494                         if (!mover.rename(FileName(from), FileName(to))) {
 495                                 Alert::error(_("Cannot convert file"),
 496                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 497                                                 from_utf8(from), from_utf8(to)));
 498                                 return false;
 499                         }
 500                 }
 501                 return true;
 502         } else {
 503                 if (conversionflags & try_cache)
 504                         ConverterCache::get().add(orig_from, to_format, outfile);
 505                 return move(conv.to, outfile, to_file, conv.latex);
 506         }
 507 }
 508
 509
 510 bool Converters::move(string const & fmt,
 511                       FileName const & from, FileName const & to, bool copy)
 512 {
 513         if (from == to)
 514                 return true;
 515
 516         bool no_errors = true;
 517         string const path = onlyPath(from.absFilename());
 518         string const base = onlyFilename(removeExtension(from.absFilename()));
 519         string const to_base = removeExtension(to.absFilename());
 520         string const to_extension = getExtension(to.absFilename());
 521
 522         vector<FileName> const files = FileName(path).dirList(getExtension(from.absFilename()));
 523         for (vector<FileName>::const_iterator it = files.begin();
 524              it != files.end(); ++it) {
 525                 string const from2 = it->absFilename();
 526                 string const file2 = onlyFilename(from2);
 527                 if (prefixIs(file2, base)) {
 528                         string const to2 = changeExtension(
 529                                 to_base + file2.substr(base.length()),
 530                                 to_extension);
 531                         LYXERR(Debug::FILES, "moving " << from2 << " to " << to2);
 532
 533                         Mover const & mover = getMover(fmt);
 534                         bool const moved = copy
 535                                 ? mover.copy(*it, FileName(to2))
 536                                 : mover.rename(*it, FileName(to2));
 537                         if (!moved && no_errors) {
 538                                 Alert::error(_("Cannot convert file"),
 539                                         bformat(copy ?
 540                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 541                                                 _("Could not move a temporary file from %1$s to %2$s."),
 542                                                 from_utf8(from2), from_utf8(to2)));
 543                                 no_errors = false;
 544                         }
 545                 }
 546         }
 547         return no_errors;
 548 }
 549
 550
 551 bool Converters::formatIsUsed(string const & format)
 552 {
 553         ConverterList::const_iterator cit = converterlist_.begin();
 554         ConverterList::const_iterator end = converterlist_.end();
 555         for (; cit != end; ++cit) {
 556                 if (cit->from == format || cit->to == format)
 557                         return true;
 558         }
 559         return false;
 560 }
 561
 562
 563 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 564                          FileName const & filename, ErrorList & errorList)
 565 {
 566         OutputParams runparams(0);
 567         runparams.flavor = OutputParams::LATEX;
 568         LaTeX latex("", runparams, filename);
 569         TeXErrors terr;
 570         int const result = latex.scanLogFile(terr);
 571
 572         if (result & LaTeX::ERRORS)
 573                 buffer.bufferErrors(terr, errorList);
 574
 575         return true;
 576 }
 577
 578
 579 namespace {
 580
 581 class ShowMessage
 582         : public boost::signals::trackable {
 583 public:
 584         ShowMessage(Buffer const & b) : buffer_(b) {}
 585         void operator()(docstring const & msg) const { buffer_.message(msg); }
 586 private:
 587         Buffer const & buffer_;
 588 };
 589
 590 }
 591
 592
 593 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 594                           OutputParams const & runparams, ErrorList & errorList)
 595 {
 596         buffer.setBusy(true);
 597         buffer.message(_("Running LaTeX..."));
 598
 599         runparams.document_language = buffer.params().language->babel();
 600
 601         // do the LaTeX run(s)
 602         string const name = buffer.latexName();
 603         LaTeX latex(command, runparams, FileName(makeAbsPath(name)));
 604         TeXErrors terr;
 605         ShowMessage show(buffer);
 606         latex.message.connect(show);
 607         int const result = latex.run(terr);
 608
 609         if (result & LaTeX::ERRORS)
 610                 buffer.bufferErrors(terr, errorList);
 611
 612         // check return value from latex.run().
 613         if ((result & LaTeX::NO_LOGFILE)) {
 614                 docstring const str =
 615                         bformat(_("LaTeX did not run successfully. "
 616                                                "Additionally, LyX could not locate "
 617                                                "the LaTeX log %1$s."), from_utf8(name));
 618                 Alert::error(_("LaTeX failed"), str);
 619         } else if (result & LaTeX::NO_OUTPUT) {
 620                 Alert::warning(_("Output is empty"),
 621                                _("An empty output file was generated."));
 622         }
 623
 624
 625         buffer.setBusy(false);
 626
 627         int const ERROR_MASK =
 628                         LaTeX::NO_LOGFILE |
 629                         LaTeX::ERRORS |
 630                         LaTeX::NO_OUTPUT;
 631
 632         return (result & ERROR_MASK) == 0;
 633
 634 }
 635
 636
 637
 638 void Converters::buildGraph()
 639 {
 640         G_.init(formats.size());
 641         ConverterList::iterator beg = converterlist_.begin();
 642         ConverterList::iterator const end = converterlist_.end();
 643         for (ConverterList::iterator it = beg; it != end ; ++it) {
 644                 int const s = formats.getNumber(it->from);
 645                 int const t = formats.getNumber(it->to);
 646                 G_.addEdge(s,t);
 647         }
 648 }
 649
 650
 651 std::vector<Format const *> const
 652 Converters::intToFormat(std::vector<int> const & input)
 653 {
 654         vector<Format const *> result(input.size());
 655
 656         vector<int>::const_iterator it = input.begin();
 657         vector<int>::const_iterator const end = input.end();
 658         vector<Format const *>::iterator rit = result.begin();
 659         for ( ; it != end; ++it, ++rit) {
 660                 *rit = &formats.get(*it);
 661         }
 662         return result;
 663 }
 664
 665
 666 vector<Format const *> const
 667 Converters::getReachableTo(string const & target, bool const clear_visited)
 668 {
 669         vector<int> const & reachablesto =
 670                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 671
 672         return intToFormat(reachablesto);
 673 }
 674
 675
 676 vector<Format const *> const
 677 Converters::getReachable(string const & from, bool const only_viewable,
 678                          bool const clear_visited)
 679 {
 680         vector<int> const & reachables =
 681                 G_.getReachable(formats.getNumber(from),
 682                                 only_viewable,
 683                                 clear_visited);
 684
 685         return intToFormat(reachables);
 686 }
 687
 688
 689 bool Converters::isReachable(string const & from, string const & to)
 690 {
 691         return G_.isReachable(formats.getNumber(from),
 692                               formats.getNumber(to));
 693 }
 694
 695
 696 Graph::EdgePath Converters::getPath(string const & from, string const & to)
 697 {
 698         return G_.getPath(formats.getNumber(from),
 699                           formats.getNumber(to));
 700 }
 701
 702
 703 vector<Format const *> Converters::importableFormats()
 704 {
 705         vector<string> l = loaders();
 706         vector<Format const *> result = getReachableTo(l[0], true);
 707         for (vector<string>::const_iterator it = l.begin() + 1;
 708              it != l.end(); ++it) {
 709                 vector<Format const *> r = getReachableTo(*it, false);
 710                 result.insert(result.end(), r.begin(), r.end());
 711         }
 712         return result;
 713 }
 714
 715
 716 vector<string> Converters::loaders() const
 717 {
 718         vector<string> v;
 719         v.push_back("lyx");
 720         v.push_back("text");
 721         v.push_back("textparagraph");
 722         return v;
 723 }
 724
 725
 726 } // namespace lyx