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/FileNameList.h"
  29 #include "support/filetools.h"
  30 #include "support/gettext.h"
  31 #include "support/lstrings.h"
  32 #include "support/os.h"
  33 #include "support/Package.h"
  34 #include "support/Path.h"
  35 #include "support/Systemcall.h"
  36
  37 using namespace std;
  38 using namespace lyx::support;
  39
  40 namespace lyx {
  41
  42 namespace Alert = lyx::frontend::Alert;
  43
  44
  45 namespace {
  46
  47 string const token_from("$$i");
  48 string const token_base("$$b");
  49 string const token_to("$$o");
  50 string const token_path("$$p");
  51 string const token_orig_path("$$r");
  52
  53
  54
  55 string const add_options(string const & command, string const & options)
  56 {
  57         string head;
  58         string const tail = split(command, head, ' ');
  59         return head + ' ' + options + ' ' + tail;
  60 }
  61
  62
  63 string const dvipdfm_options(BufferParams const & bp)
  64 {
  65         string result;
  66
  67         if (bp.papersize != PAPER_CUSTOM) {
  68                 string const paper_size = bp.paperSizeName(BufferParams::DVIPDFM);
  69                 if (!paper_size.empty())
  70                         result = "-p "+ paper_size;
  71
  72                 if (bp.orientation == ORIENTATION_LANDSCAPE)
  73                         result += " -l";
  74         }
  75
  76         return result;
  77 }
  78
  79
  80 class ConverterEqual {
  81 public:
  82         ConverterEqual(string const & from, string const & to)
  83                 : from_(from), to_(to) {}
  84         bool operator()(Converter const & c) const {
  85                 return c.from == from_ && c.to == to_;
  86         }
  87 private:
  88         string const from_;
  89         string const to_;
  90 };
  91
  92 } // namespace anon
  93
  94
  95 Converter::Converter(string const & f, string const & t,
  96                      string const & c, string const & l)
  97         : from(f), to(t), command(c), flags(l),
  98           From(0), To(0), latex(false), xml(false),
  99           need_aux(false)
 100 {}
 101
 102
 103 void Converter::readFlags()
 104 {
 105         string flag_list(flags);
 106         while (!flag_list.empty()) {
 107                 string flag_name, flag_value;
 108                 flag_list = split(flag_list, flag_value, ',');
 109                 flag_value = split(flag_value, flag_name, '=');
 110                 if (flag_name == "latex")
 111                         latex = true;
 112                 else if (flag_name == "xml")
 113                         xml = true;
 114                 else if (flag_name == "needaux")
 115                         need_aux = true;
 116                 else if (flag_name == "resultdir")
 117                         result_dir = (flag_value.empty())
 118                                 ? token_base : flag_value;
 119                 else if (flag_name == "resultfile")
 120                         result_file = flag_value;
 121                 else if (flag_name == "parselog")
 122                         parselog = flag_value;
 123         }
 124         if (!result_dir.empty() && result_file.empty())
 125                 result_file = "index." + formats.extension(to);
 126         //if (!contains(command, token_from))
 127         //      latex = true;
 128 }
 129
 130
 131 bool operator<(Converter const & a, Converter const & b)
 132 {
 133         // use the compare_ascii_no_case instead of compare_no_case,
 134         // because in turkish, 'i' is not the lowercase version of 'I',
 135         // and thus turkish locale breaks parsing of tags.
 136         int const i = compare_ascii_no_case(a.From->prettyname(),
 137                                             b.From->prettyname());
 138         if (i == 0)
 139                 return compare_ascii_no_case(a.To->prettyname(),
 140                                              b.To->prettyname()) < 0;
 141         else
 142                 return i < 0;
 143 }
 144
 145
 146 Converter const * Converters::getConverter(string const & from,
 147                                             string const & to) const
 148 {
 149         ConverterList::const_iterator const cit =
 150                 find_if(converterlist_.begin(), converterlist_.end(),
 151                         ConverterEqual(from, to));
 152         if (cit != converterlist_.end())
 153                 return &(*cit);
 154         else
 155                 return 0;
 156 }
 157
 158
 159 int Converters::getNumber(string const & from, string const & to) const
 160 {
 161         ConverterList::const_iterator const cit =
 162                 find_if(converterlist_.begin(), converterlist_.end(),
 163                         ConverterEqual(from, to));
 164         if (cit != converterlist_.end())
 165                 return distance(converterlist_.begin(), cit);
 166         else
 167                 return -1;
 168 }
 169
 170
 171 void Converters::add(string const & from, string const & to,
 172                      string const & command, string const & flags)
 173 {
 174         formats.add(from);
 175         formats.add(to);
 176         ConverterList::iterator it = find_if(converterlist_.begin(),
 177                                              converterlist_.end(),
 178                                              ConverterEqual(from , to));
 179
 180         Converter converter(from, to, command, flags);
 181         if (it != converterlist_.end() && !flags.empty() && flags[0] == '*') {
 182                 converter = *it;
 183                 converter.command = command;
 184                 converter.flags = flags;
 185         }
 186         converter.readFlags();
 187
 188         if (converter.latex && (latex_command_.empty() || to == "dvi"))
 189                 latex_command_ = subst(command, token_from, "");
 190         // If we have both latex & pdflatex, we set latex_command to latex.
 191         // The latex_command is used to update the .aux file when running
 192         // a converter that uses it.
 193
 194         if (it == converterlist_.end()) {
 195                 converterlist_.push_back(converter);
 196         } else {
 197                 converter.From = it->From;
 198                 converter.To = it->To;
 199                 *it = converter;
 200         }
 201 }
 202
 203
 204 void Converters::erase(string const & from, string const & to)
 205 {
 206         ConverterList::iterator const it =
 207                 find_if(converterlist_.begin(),
 208                         converterlist_.end(),
 209                         ConverterEqual(from, to));
 210         if (it != converterlist_.end())
 211                 converterlist_.erase(it);
 212 }
 213
 214
 215 // This method updates the pointers From and To in all the converters.
 216 // The code is not very efficient, but it doesn't matter as the number
 217 // of formats and converters is small.
 218 // Furthermore, this method is called only on startup, or after
 219 // adding/deleting a format in FormPreferences (the latter calls can be
 220 // eliminated if the formats in the Formats class are stored using a map or
 221 // a list (instead of a vector), but this will cause other problems).
 222 void Converters::update(Formats const & formats)
 223 {
 224         ConverterList::iterator it = converterlist_.begin();
 225         ConverterList::iterator end = converterlist_.end();
 226         for (; it != end; ++it) {
 227                 it->From = formats.getFormat(it->from);
 228                 it->To = formats.getFormat(it->to);
 229         }
 230 }
 231
 232
 233 // This method updates the pointers From and To in the last converter.
 234 // It is called when adding a new converter in FormPreferences
 235 void Converters::updateLast(Formats const & formats)
 236 {
 237         if (converterlist_.begin() != converterlist_.end()) {
 238                 ConverterList::iterator it = converterlist_.end() - 1;
 239                 it->From = formats.getFormat(it->from);
 240                 it->To = formats.getFormat(it->to);
 241         }
 242 }
 243
 244
 245 void Converters::sort()
 246 {
 247         std::sort(converterlist_.begin(), converterlist_.end());
 248 }
 249
 250
 251 OutputParams::FLAVOR Converters::getFlavor(Graph::EdgePath const & path)
 252 {
 253         for (Graph::EdgePath::const_iterator cit = path.begin();
 254              cit != path.end(); ++cit) {
 255                 Converter const & conv = converterlist_[*cit];
 256                 if (conv.latex)
 257                         if (contains(conv.from, "xetex"))
 258                                 return OutputParams::XETEX;
 259                         if (contains(conv.to, "pdf"))
 260                                 return OutputParams::PDFLATEX;
 261                 if (conv.xml)
 262                         return OutputParams::XML;
 263         }
 264         return OutputParams::LATEX;
 265 }
 266
 267
 268 bool Converters::convert(Buffer const * buffer,
 269                          FileName const & from_file, FileName const & to_file,
 270                          FileName const & orig_from,
 271                          string const & from_format, string const & to_format,
 272                          ErrorList & errorList, int conversionflags)
 273 {
 274         if (from_format == to_format)
 275                 return move(from_format, from_file, to_file, false);
 276
 277         if ((conversionflags & try_cache) &&
 278             ConverterCache::get().inCache(orig_from, to_format))
 279                 return ConverterCache::get().copy(orig_from, to_format, to_file);
 280
 281         Graph::EdgePath edgepath = getPath(from_format, to_format);
 282         if (edgepath.empty()) {
 283                 if (conversionflags & try_default) {
 284                         // if no special converter defined, then we take the
 285                         // default one from ImageMagic.
 286                         string const from_ext = from_format.empty() ?
 287                                 getExtension(from_file.absFilename()) :
 288                                 formats.extension(from_format);
 289                         string const to_ext = formats.extension(to_format);
 290                         string const command =
 291                                 os::python() + ' ' +
 292                                 quoteName(libFileSearch("scripts", "convertDefault.py").toFilesystemEncoding()) +
 293                                 ' ' +
 294                                 quoteName(from_ext + ':' + from_file.toFilesystemEncoding()) +
 295                                 ' ' +
 296                                 quoteName(to_ext + ':' + to_file.toFilesystemEncoding());
 297                         LYXERR(Debug::FILES, "No converter defined! "
 298                                    "I use convertDefault.py:\n\t" << command);
 299                         Systemcall one;
 300                         one.startscript(Systemcall::Wait, command);
 301                         if (to_file.isReadableFile()) {
 302                                 if (conversionflags & try_cache)
 303                                         ConverterCache::get().add(orig_from,
 304                                                         to_format, to_file);
 305                                 return true;
 306                         }
 307                 }
 308
 309                 // only warn once per session and per file type
 310                 static std::map<string, string> warned;
 311                 if (warned.find(from_format) != warned.end() && warned.find(from_format)->second == to_format) {
 312                         return false;
 313                 }
 314                 warned.insert(make_pair(from_format, to_format));
 315
 316                 Alert::error(_("Cannot convert file"),
 317                              bformat(_("No information for converting %1$s "
 318                                                     "format files to %2$s.\n"
 319                                                     "Define a converter in the preferences."),
 320                                                         from_ascii(from_format), from_ascii(to_format)));
 321                 return false;
 322         }
 323
 324         // buffer is only invalid for importing, and then runparams is not
 325         // used anyway.
 326         OutputParams runparams(buffer ? &buffer->params().encoding() : 0);
 327         runparams.flavor = getFlavor(edgepath);
 328
 329         // Some converters (e.g. lilypond) can only output files to the
 330         // current directory, so we need to change the current directory.
 331         // This has the added benefit that all other files that may be
 332         // generated by the converter are deleted when LyX closes and do not
 333         // clutter the real working directory.
 334         string const path(onlyPath(from_file.absFilename()));
 335         // Prevent the compiler from optimizing away p
 336         FileName pp(path);
 337         PathChanger p(pp);
 338
 339         // empty the error list before any new conversion takes place.
 340         errorList.clear();
 341
 342         bool run_latex = false;
 343         string from_base = changeExtension(from_file.absFilename(), "");
 344         string to_base = changeExtension(to_file.absFilename(), "");
 345         FileName infile;
 346         FileName outfile = from_file;
 347         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 348              cit != edgepath.end(); ++cit) {
 349                 Converter const & conv = converterlist_[*cit];
 350                 bool dummy = conv.To->dummy() && conv.to != "program";
 351                 if (!dummy) {
 352                         LYXERR(Debug::FILES, "Converting from  "
 353                                << conv.from << " to " << conv.to);
 354                 }
 355                 infile = outfile;
 356                 outfile = FileName(conv.result_dir.empty()
 357                         ? changeExtension(from_file.absFilename(), conv.To->extension())
 358                         : addName(subst(conv.result_dir,
 359                                         token_base, from_base),
 360                                   subst(conv.result_file,
 361                                         token_base, onlyFilename(from_base))));
 362
 363                 // if input and output files are equal, we use a
 364                 // temporary file as intermediary (JMarc)
 365                 FileName real_outfile;
 366                 if (outfile == infile) {
 367                         real_outfile = infile;
 368                         // when importing, a buffer does not necessarily exist
 369                         if (buffer)
 370                                 outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 371                         else
 372                                 outfile = FileName(addName(package().temp_dir().absFilename(),
 373                                                    "tmpfile.out"));
 374                 }
 375
 376                 if (conv.latex) {
 377                         run_latex = true;
 378                         string const command = subst(conv.command, token_from, "");
 379                         LYXERR(Debug::FILES, "Running " << command);
 380                         if (!runLaTeX(*buffer, command, runparams, errorList))
 381                                 return false;
 382                 } else {
 383                         if (conv.need_aux && !run_latex
 384                             && !latex_command_.empty()) {
 385                                 LYXERR(Debug::FILES, "Running " << latex_command_
 386                                         << " to update aux file");
 387                                 runLaTeX(*buffer, latex_command_, runparams, errorList);
 388                         }
 389
 390                         // FIXME UNICODE
 391                         string const infile2 =
 392                                 to_utf8(makeRelPath(from_utf8(infile.absFilename()), from_utf8(path)));
 393                         string const outfile2 =
 394                                 to_utf8(makeRelPath(from_utf8(outfile.absFilename()), from_utf8(path)));
 395
 396                         string command = conv.command;
 397                         command = subst(command, token_from, quoteName(infile2));
 398                         command = subst(command, token_base, quoteName(from_base));
 399                         command = subst(command, token_to, quoteName(outfile2));
 400                         command = subst(command, token_path, quoteName(infile.onlyPath().absFilename()));
 401                         command = subst(command, token_orig_path, quoteName(orig_from.onlyPath().absFilename()));
 402                         command = libScriptSearch(command);
 403
 404                         if (!conv.parselog.empty())
 405                                 command += " 2> " + quoteName(infile2 + ".out");
 406
 407                         if (conv.from == "dvi" && conv.to == "ps")
 408                                 command = add_options(command,
 409                                                       buffer->params().dvips_options());
 410                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 411                                 command = add_options(command,
 412                                                       dvipdfm_options(buffer->params()));
 413
 414                         LYXERR(Debug::FILES, "Calling " << command);
 415                         if (buffer)
 416                                 buffer->message(_("Executing command: ")
 417                                 + from_utf8(command));
 418
 419                         Systemcall one;
 420                         int res;
 421                         if (dummy) {
 422                                 res = one.startscript(Systemcall::DontWait,
 423                                         to_filesystem8bit(from_utf8(command)));
 424                                 // We're not waiting for the result, so we can't do anything
 425                                 // else here.
 426                         } else {
 427                                 res = one.startscript(Systemcall::Wait,
 428                                                 to_filesystem8bit(from_utf8(command)));
 429                                 if (!real_outfile.empty()) {
 430                                         Mover const & mover = getMover(conv.to);
 431                                         if (!mover.rename(outfile, real_outfile))
 432                                                 res = -1;
 433                                         else
 434                                                 LYXERR(Debug::FILES, "renaming file " << outfile
 435                                                         << " to " << real_outfile);
 436                                         // Finally, don't forget to tell any future
 437                                         // converters to use the renamed file...
 438                                         outfile = real_outfile;
 439                                 }
 440
 441                                 if (!conv.parselog.empty()) {
 442                                         string const logfile =  infile2 + ".log";
 443                                         string const script = libScriptSearch(conv.parselog);
 444                                         string const command2 = script +
 445                                                 " < " + quoteName(infile2 + ".out") +
 446                                                 " > " + quoteName(logfile);
 447                                         one.startscript(Systemcall::Wait,
 448                                                 to_filesystem8bit(from_utf8(command2)));
 449                                         if (!scanLog(*buffer, command, makeAbsPath(logfile, path), errorList))
 450                                                 return false;
 451                                 }
 452                         }
 453
 454                         if (res) {
 455                                 if (conv.to == "program") {
 456                                         Alert::error(_("Build errors"),
 457                                                 _("There were errors during the build process."));
 458                                 } else {
 459 // FIXME: this should go out of here. For example, here we cannot say if
 460 // it is a document (.lyx) or something else. Same goes for elsewhere.
 461                                         Alert::error(_("Cannot convert file"),
 462                                                 bformat(_("An error occurred whilst running %1$s"),
 463                                                 from_utf8(command.substr(0, 50))));
 464                                 }
 465                                 return false;
 466                         }
 467                 }
 468         }
 469
 470         Converter const & conv = converterlist_[edgepath.back()];
 471         if (conv.To->dummy())
 472                 return true;
 473
 474         if (!conv.result_dir.empty()) {
 475                 // The converter has put the file(s) in a directory.
 476                 // In this case we ignore the given to_file.
 477                 if (from_base != to_base) {
 478                         string const from = subst(conv.result_dir,
 479                                             token_base, from_base);
 480                         string const to = subst(conv.result_dir,
 481                                           token_base, to_base);
 482                         Mover const & mover = getMover(conv.from);
 483                         if (!mover.rename(FileName(from), FileName(to))) {
 484                                 Alert::error(_("Cannot convert file"),
 485                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 486                                                 from_utf8(from), from_utf8(to)));
 487                                 return false;
 488                         }
 489                 }
 490                 return true;
 491         } else {
 492                 if (conversionflags & try_cache)
 493                         ConverterCache::get().add(orig_from, to_format, outfile);
 494                 return move(conv.to, outfile, to_file, conv.latex);
 495         }
 496 }
 497
 498
 499 bool Converters::move(string const & fmt,
 500                       FileName const & from, FileName const & to, bool copy)
 501 {
 502         if (from == to)
 503                 return true;
 504
 505         bool no_errors = true;
 506         string const path = onlyPath(from.absFilename());
 507         string const base = onlyFilename(removeExtension(from.absFilename()));
 508         string const to_base = removeExtension(to.absFilename());
 509         string const to_extension = getExtension(to.absFilename());
 510
 511         support::FileNameList const files = FileName(path).dirList(getExtension(from.absFilename()));
 512         for (support::FileNameList::const_iterator it = files.begin();
 513              it != files.end(); ++it) {
 514                 string const from2 = it->absFilename();
 515                 string const file2 = onlyFilename(from2);
 516                 if (prefixIs(file2, base)) {
 517                         string const to2 = changeExtension(
 518                                 to_base + file2.substr(base.length()),
 519                                 to_extension);
 520                         LYXERR(Debug::FILES, "moving " << from2 << " to " << to2);
 521
 522                         Mover const & mover = getMover(fmt);
 523                         bool const moved = copy
 524                                 ? mover.copy(*it, FileName(to2))
 525                                 : mover.rename(*it, FileName(to2));
 526                         if (!moved && no_errors) {
 527                                 Alert::error(_("Cannot convert file"),
 528                                         bformat(copy ?
 529                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 530                                                 _("Could not move a temporary file from %1$s to %2$s."),
 531                                                 from_utf8(from2), from_utf8(to2)));
 532                                 no_errors = false;
 533                         }
 534                 }
 535         }
 536         return no_errors;
 537 }
 538
 539
 540 bool Converters::formatIsUsed(string const & format)
 541 {
 542         ConverterList::const_iterator cit = converterlist_.begin();
 543         ConverterList::const_iterator end = converterlist_.end();
 544         for (; cit != end; ++cit) {
 545                 if (cit->from == format || cit->to == format)
 546                         return true;
 547         }
 548         return false;
 549 }
 550
 551
 552 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 553                          FileName const & filename, ErrorList & errorList)
 554 {
 555         OutputParams runparams(0);
 556         runparams.flavor = OutputParams::LATEX;
 557         LaTeX latex("", runparams, filename);
 558         TeXErrors terr;
 559         int const result = latex.scanLogFile(terr);
 560
 561         if (result & LaTeX::ERRORS)
 562                 buffer.bufferErrors(terr, errorList);
 563
 564         return true;
 565 }
 566
 567
 568 namespace {
 569
 570 class ShowMessage
 571         : public boost::signals::trackable {
 572 public:
 573         ShowMessage(Buffer const & b) : buffer_(b) {}
 574         void operator()(docstring const & msg) const { buffer_.message(msg); }
 575 private:
 576         Buffer const & buffer_;
 577 };
 578
 579 }
 580
 581
 582 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 583                           OutputParams const & runparams, ErrorList & errorList)
 584 {
 585         buffer.setBusy(true);
 586         buffer.message(_("Running LaTeX..."));
 587
 588         runparams.document_language = buffer.params().language->babel();
 589
 590         // do the LaTeX run(s)
 591         string const name = buffer.latexName();
 592         LaTeX latex(command, runparams, FileName(makeAbsPath(name)));
 593         TeXErrors terr;
 594         ShowMessage show(buffer);
 595         latex.message.connect(show);
 596         int const result = latex.run(terr);
 597
 598         if (result & LaTeX::ERRORS)
 599                 buffer.bufferErrors(terr, errorList);
 600
 601         // check return value from latex.run().
 602         if ((result & LaTeX::NO_LOGFILE)) {
 603                 docstring const str =
 604                         bformat(_("LaTeX did not run successfully. "
 605                                                "Additionally, LyX could not locate "
 606                                                "the LaTeX log %1$s."), from_utf8(name));
 607                 Alert::error(_("LaTeX failed"), str);
 608         } else if (result & LaTeX::NO_OUTPUT) {
 609                 Alert::warning(_("Output is empty"),
 610                                _("An empty output file was generated."));
 611         }
 612
 613
 614         buffer.setBusy(false);
 615
 616         int const ERROR_MASK =
 617                         LaTeX::NO_LOGFILE |
 618                         LaTeX::ERRORS |
 619                         LaTeX::NO_OUTPUT;
 620
 621         return (result & ERROR_MASK) == 0;
 622
 623 }
 624
 625
 626
 627 void Converters::buildGraph()
 628 {
 629         G_.init(formats.size());
 630         ConverterList::iterator beg = converterlist_.begin();
 631         ConverterList::iterator const end = converterlist_.end();
 632         for (ConverterList::iterator it = beg; it != end ; ++it) {
 633                 int const s = formats.getNumber(it->from);
 634                 int const t = formats.getNumber(it->to);
 635                 G_.addEdge(s,t);
 636         }
 637 }
 638
 639
 640 vector<Format const *> const
 641 Converters::intToFormat(vector<int> const & input)
 642 {
 643         vector<Format const *> result(input.size());
 644
 645         vector<int>::const_iterator it = input.begin();
 646         vector<int>::const_iterator const end = input.end();
 647         vector<Format const *>::iterator rit = result.begin();
 648         for ( ; it != end; ++it, ++rit) {
 649                 *rit = &formats.get(*it);
 650         }
 651         return result;
 652 }
 653
 654
 655 vector<Format const *> const
 656 Converters::getReachableTo(string const & target, bool const clear_visited)
 657 {
 658         vector<int> const & reachablesto =
 659                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 660
 661         return intToFormat(reachablesto);
 662 }
 663
 664
 665 vector<Format const *> const
 666 Converters::getReachable(string const & from, bool const only_viewable,
 667                          bool const clear_visited)
 668 {
 669         vector<int> const & reachables =
 670                 G_.getReachable(formats.getNumber(from),
 671                                 only_viewable,
 672                                 clear_visited);
 673
 674         return intToFormat(reachables);
 675 }
 676
 677
 678 bool Converters::isReachable(string const & from, string const & to)
 679 {
 680         return G_.isReachable(formats.getNumber(from),
 681                               formats.getNumber(to));
 682 }
 683
 684
 685 Graph::EdgePath Converters::getPath(string const & from, string const & to)
 686 {
 687         return G_.getPath(formats.getNumber(from),
 688                           formats.getNumber(to));
 689 }
 690
 691
 692 vector<Format const *> Converters::importableFormats()
 693 {
 694         vector<string> l = loaders();
 695         vector<Format const *> result = getReachableTo(l[0], true);
 696         for (vector<string>::const_iterator it = l.begin() + 1;
 697              it != l.end(); ++it) {
 698                 vector<Format const *> r = getReachableTo(*it, false);
 699                 result.insert(result.end(), r.begin(), r.end());
 700         }
 701         return result;
 702 }
 703
 704
 705 vector<string> Converters::loaders() const
 706 {
 707         vector<string> v;
 708         v.push_back("lyx");
 709         v.push_back("text");
 710         v.push_back("textparagraph");
 711         return v;
 712 }
 713
 714
 715 } // namespace lyx