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         if (buffer)
 330                 runparams.use_japanese = buffer->bufferFormat() == "platex";
 331
 332         // Some converters (e.g. lilypond) can only output files to the
 333         // current directory, so we need to change the current directory.
 334         // This has the added benefit that all other files that may be
 335         // generated by the converter are deleted when LyX closes and do not
 336         // clutter the real working directory.
 337         string const path(onlyPath(from_file.absFilename()));
 338         // Prevent the compiler from optimizing away p
 339         FileName pp(path);
 340         PathChanger p(pp);
 341
 342         // empty the error list before any new conversion takes place.
 343         errorList.clear();
 344
 345         bool run_latex = false;
 346         string from_base = changeExtension(from_file.absFilename(), "");
 347         string to_base = changeExtension(to_file.absFilename(), "");
 348         FileName infile;
 349         FileName outfile = from_file;
 350         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 351              cit != edgepath.end(); ++cit) {
 352                 Converter const & conv = converterlist_[*cit];
 353                 bool dummy = conv.To->dummy() && conv.to != "program";
 354                 if (!dummy) {
 355                         LYXERR(Debug::FILES, "Converting from  "
 356                                << conv.from << " to " << conv.to);
 357                 }
 358                 infile = outfile;
 359                 outfile = FileName(conv.result_dir.empty()
 360                         ? changeExtension(from_file.absFilename(), conv.To->extension())
 361                         : addName(subst(conv.result_dir,
 362                                         token_base, from_base),
 363                                   subst(conv.result_file,
 364                                         token_base, onlyFilename(from_base))));
 365
 366                 // if input and output files are equal, we use a
 367                 // temporary file as intermediary (JMarc)
 368                 FileName real_outfile;
 369                 if (outfile == infile) {
 370                         real_outfile = infile;
 371                         // when importing, a buffer does not necessarily exist
 372                         if (buffer)
 373                                 outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 374                         else
 375                                 outfile = FileName(addName(package().temp_dir().absFilename(),
 376                                                    "tmpfile.out"));
 377                 }
 378
 379                 if (conv.latex) {
 380                         run_latex = true;
 381                         string const command = subst(conv.command, token_from, "");
 382                         LYXERR(Debug::FILES, "Running " << command);
 383                         if (!runLaTeX(*buffer, command, runparams, errorList))
 384                                 return false;
 385                 } else {
 386                         if (conv.need_aux && !run_latex
 387                             && !latex_command_.empty()) {
 388                                 LYXERR(Debug::FILES, "Running " << latex_command_
 389                                         << " to update aux file");
 390                                 runLaTeX(*buffer, latex_command_, runparams, errorList);
 391                         }
 392
 393                         // FIXME UNICODE
 394                         string const infile2 =
 395                                 to_utf8(makeRelPath(from_utf8(infile.absFilename()), from_utf8(path)));
 396                         string const outfile2 =
 397                                 to_utf8(makeRelPath(from_utf8(outfile.absFilename()), from_utf8(path)));
 398
 399                         string command = conv.command;
 400                         command = subst(command, token_from, quoteName(infile2));
 401                         command = subst(command, token_base, quoteName(from_base));
 402                         command = subst(command, token_to, quoteName(outfile2));
 403                         command = subst(command, token_path, quoteName(infile.onlyPath().absFilename()));
 404                         command = subst(command, token_orig_path, quoteName(orig_from.onlyPath().absFilename()));
 405                         command = libScriptSearch(command);
 406
 407                         if (!conv.parselog.empty())
 408                                 command += " 2> " + quoteName(infile2 + ".out");
 409
 410                         if (conv.from == "dvi" && conv.to == "ps")
 411                                 command = add_options(command,
 412                                                       buffer->params().dvips_options());
 413                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 414                                 command = add_options(command,
 415                                                       dvipdfm_options(buffer->params()));
 416
 417                         LYXERR(Debug::FILES, "Calling " << command);
 418                         if (buffer)
 419                                 buffer->message(_("Executing command: ")
 420                                 + from_utf8(command));
 421
 422                         Systemcall one;
 423                         int res;
 424                         if (dummy) {
 425                                 res = one.startscript(Systemcall::DontWait,
 426                                         to_filesystem8bit(from_utf8(command)));
 427                                 // We're not waiting for the result, so we can't do anything
 428                                 // else here.
 429                         } else {
 430                                 res = one.startscript(Systemcall::Wait,
 431                                                 to_filesystem8bit(from_utf8(command)));
 432                                 if (!real_outfile.empty()) {
 433                                         Mover const & mover = getMover(conv.to);
 434                                         if (!mover.rename(outfile, real_outfile))
 435                                                 res = -1;
 436                                         else
 437                                                 LYXERR(Debug::FILES, "renaming file " << outfile
 438                                                         << " to " << real_outfile);
 439                                         // Finally, don't forget to tell any future
 440                                         // converters to use the renamed file...
 441                                         outfile = real_outfile;
 442                                 }
 443
 444                                 if (!conv.parselog.empty()) {
 445                                         string const logfile =  infile2 + ".log";
 446                                         string const script = libScriptSearch(conv.parselog);
 447                                         string const command2 = script +
 448                                                 " < " + quoteName(infile2 + ".out") +
 449                                                 " > " + quoteName(logfile);
 450                                         one.startscript(Systemcall::Wait,
 451                                                 to_filesystem8bit(from_utf8(command2)));
 452                                         if (!scanLog(*buffer, command, makeAbsPath(logfile, path), errorList))
 453                                                 return false;
 454                                 }
 455                         }
 456
 457                         if (res) {
 458                                 if (conv.to == "program") {
 459                                         Alert::error(_("Build errors"),
 460                                                 _("There were errors during the build process."));
 461                                 } else {
 462 // FIXME: this should go out of here. For example, here we cannot say if
 463 // it is a document (.lyx) or something else. Same goes for elsewhere.
 464                                         Alert::error(_("Cannot convert file"),
 465                                                 bformat(_("An error occurred whilst running %1$s"),
 466                                                 from_utf8(command.substr(0, 50))));
 467                                 }
 468                                 return false;
 469                         }
 470                 }
 471         }
 472
 473         Converter const & conv = converterlist_[edgepath.back()];
 474         if (conv.To->dummy())
 475                 return true;
 476
 477         if (!conv.result_dir.empty()) {
 478                 // The converter has put the file(s) in a directory.
 479                 // In this case we ignore the given to_file.
 480                 if (from_base != to_base) {
 481                         string const from = subst(conv.result_dir,
 482                                             token_base, from_base);
 483                         string const to = subst(conv.result_dir,
 484                                           token_base, to_base);
 485                         Mover const & mover = getMover(conv.from);
 486                         if (!mover.rename(FileName(from), FileName(to))) {
 487                                 Alert::error(_("Cannot convert file"),
 488                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 489                                                 from_utf8(from), from_utf8(to)));
 490                                 return false;
 491                         }
 492                 }
 493                 return true;
 494         } else {
 495                 if (conversionflags & try_cache)
 496                         ConverterCache::get().add(orig_from, to_format, outfile);
 497                 return move(conv.to, outfile, to_file, conv.latex);
 498         }
 499 }
 500
 501
 502 bool Converters::move(string const & fmt,
 503                       FileName const & from, FileName const & to, bool copy)
 504 {
 505         if (from == to)
 506                 return true;
 507
 508         bool no_errors = true;
 509         string const path = onlyPath(from.absFilename());
 510         string const base = onlyFilename(removeExtension(from.absFilename()));
 511         string const to_base = removeExtension(to.absFilename());
 512         string const to_extension = getExtension(to.absFilename());
 513
 514         support::FileNameList const files = FileName(path).dirList(getExtension(from.absFilename()));
 515         for (support::FileNameList::const_iterator it = files.begin();
 516              it != files.end(); ++it) {
 517                 string const from2 = it->absFilename();
 518                 string const file2 = onlyFilename(from2);
 519                 if (prefixIs(file2, base)) {
 520                         string const to2 = changeExtension(
 521                                 to_base + file2.substr(base.length()),
 522                                 to_extension);
 523                         LYXERR(Debug::FILES, "moving " << from2 << " to " << to2);
 524
 525                         Mover const & mover = getMover(fmt);
 526                         bool const moved = copy
 527                                 ? mover.copy(*it, FileName(to2))
 528                                 : mover.rename(*it, FileName(to2));
 529                         if (!moved && no_errors) {
 530                                 Alert::error(_("Cannot convert file"),
 531                                         bformat(copy ?
 532                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 533                                                 _("Could not move a temporary file from %1$s to %2$s."),
 534                                                 from_utf8(from2), from_utf8(to2)));
 535                                 no_errors = false;
 536                         }
 537                 }
 538         }
 539         return no_errors;
 540 }
 541
 542
 543 bool Converters::formatIsUsed(string const & format)
 544 {
 545         ConverterList::const_iterator cit = converterlist_.begin();
 546         ConverterList::const_iterator end = converterlist_.end();
 547         for (; cit != end; ++cit) {
 548                 if (cit->from == format || cit->to == format)
 549                         return true;
 550         }
 551         return false;
 552 }
 553
 554
 555 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 556                          FileName const & filename, ErrorList & errorList)
 557 {
 558         OutputParams runparams(0);
 559         runparams.flavor = OutputParams::LATEX;
 560         LaTeX latex("", runparams, filename);
 561         TeXErrors terr;
 562         int const result = latex.scanLogFile(terr);
 563
 564         if (result & LaTeX::ERRORS)
 565                 buffer.bufferErrors(terr, errorList);
 566
 567         return true;
 568 }
 569
 570
 571 namespace {
 572
 573 class ShowMessage
 574         : public boost::signals::trackable {
 575 public:
 576         ShowMessage(Buffer const & b) : buffer_(b) {}
 577         void operator()(docstring const & msg) const { buffer_.message(msg); }
 578 private:
 579         Buffer const & buffer_;
 580 };
 581
 582 }
 583
 584
 585 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 586                           OutputParams const & runparams, ErrorList & errorList)
 587 {
 588         buffer.setBusy(true);
 589         buffer.message(_("Running LaTeX..."));
 590
 591         runparams.document_language = buffer.params().language->babel();
 592
 593         // do the LaTeX run(s)
 594         string const name = buffer.latexName();
 595         LaTeX latex(command, runparams, FileName(makeAbsPath(name)));
 596         TeXErrors terr;
 597         ShowMessage show(buffer);
 598         latex.message.connect(show);
 599         int const result = latex.run(terr);
 600
 601         if (result & LaTeX::ERRORS)
 602                 buffer.bufferErrors(terr, errorList);
 603
 604         // check return value from latex.run().
 605         if ((result & LaTeX::NO_LOGFILE)) {
 606                 docstring const str =
 607                         bformat(_("LaTeX did not run successfully. "
 608                                                "Additionally, LyX could not locate "
 609                                                "the LaTeX log %1$s."), from_utf8(name));
 610                 Alert::error(_("LaTeX failed"), str);
 611         } else if (result & LaTeX::NO_OUTPUT) {
 612                 Alert::warning(_("Output is empty"),
 613                                _("An empty output file was generated."));
 614         }
 615
 616
 617         buffer.setBusy(false);
 618
 619         int const ERROR_MASK =
 620                         LaTeX::NO_LOGFILE |
 621                         LaTeX::ERRORS |
 622                         LaTeX::NO_OUTPUT;
 623
 624         return (result & ERROR_MASK) == 0;
 625
 626 }
 627
 628
 629
 630 void Converters::buildGraph()
 631 {
 632         G_.init(formats.size());
 633         ConverterList::iterator beg = converterlist_.begin();
 634         ConverterList::iterator const end = converterlist_.end();
 635         for (ConverterList::iterator it = beg; it != end ; ++it) {
 636                 int const s = formats.getNumber(it->from);
 637                 int const t = formats.getNumber(it->to);
 638                 G_.addEdge(s,t);
 639         }
 640 }
 641
 642
 643 vector<Format const *> const
 644 Converters::intToFormat(vector<int> const & input)
 645 {
 646         vector<Format const *> result(input.size());
 647
 648         vector<int>::const_iterator it = input.begin();
 649         vector<int>::const_iterator const end = input.end();
 650         vector<Format const *>::iterator rit = result.begin();
 651         for ( ; it != end; ++it, ++rit) {
 652                 *rit = &formats.get(*it);
 653         }
 654         return result;
 655 }
 656
 657
 658 vector<Format const *> const
 659 Converters::getReachableTo(string const & target, bool const clear_visited)
 660 {
 661         vector<int> const & reachablesto =
 662                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 663
 664         return intToFormat(reachablesto);
 665 }
 666
 667
 668 vector<Format const *> const
 669 Converters::getReachable(string const & from, bool const only_viewable,
 670                          bool const clear_visited)
 671 {
 672         vector<int> const & reachables =
 673                 G_.getReachable(formats.getNumber(from),
 674                                 only_viewable,
 675                                 clear_visited);
 676
 677         return intToFormat(reachables);
 678 }
 679
 680
 681 bool Converters::isReachable(string const & from, string const & to)
 682 {
 683         return G_.isReachable(formats.getNumber(from),
 684                               formats.getNumber(to));
 685 }
 686
 687
 688 Graph::EdgePath Converters::getPath(string const & from, string const & to)
 689 {
 690         return G_.getPath(formats.getNumber(from),
 691                           formats.getNumber(to));
 692 }
 693
 694
 695 vector<Format const *> Converters::importableFormats()
 696 {
 697         vector<string> l = loaders();
 698         vector<Format const *> result = getReachableTo(l[0], true);
 699         for (vector<string>::const_iterator it = l.begin() + 1;
 700              it != l.end(); ++it) {
 701                 vector<Format const *> r = getReachableTo(*it, false);
 702                 result.insert(result.end(), r.begin(), r.end());
 703         }
 704         return result;
 705 }
 706
 707
 708 vector<string> Converters::loaders() const
 709 {
 710         vector<string> v;
 711         v.push_back("lyx");
 712         v.push_back("text");
 713         v.push_back("textparagraph");
 714         return v;
 715 }
 716
 717
 718 } // namespace lyx