src/Converter.cpp

   1 /**
   2  * \file Converter.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Dekel Tsur
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "Converter.h"
  14
  15 #include "ConverterCache.h"
  16 #include "Buffer.h"
  17 #include "buffer_funcs.h"
  18 #include "BufferParams.h"
  19 #include "debug.h"
  20 #include "ErrorList.h"
  21 #include "Format.h"
  22 #include "gettext.h"
  23 #include "Language.h"
  24 #include "LaTeX.h"
  25 #include "Mover.h"
  26
  27 #include "frontends/alert.h"
  28
  29 #include "support/filetools.h"
  30 #include "support/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::dirList;
  51 using support::FileName;
  52 using support::getExtension;
  53 using support::libFileSearch;
  54 using support::libScriptSearch;
  55 using support::makeAbsPath;
  56 using support::makeRelPath;
  57 using support::onlyFilename;
  58 using support::onlyPath;
  59 using support::package;
  60 using support::prefixIs;
  61 using support::quoteName;
  62 using support::removeExtension;
  63 using support::split;
  64 using support::subst;
  65 using support::Systemcall;
  66
  67 namespace Alert = lyx::frontend::Alert;
  68
  69
  70 namespace {
  71
  72 string const token_from("$$i");
  73 string const token_base("$$b");
  74 string const token_to("$$o");
  75 string const token_path("$$p");
  76
  77
  78
  79 string const add_options(string const & command, string const & options)
  80 {
  81         string head;
  82         string const tail = split(command, head, ' ');
  83         return head + ' ' + options + ' ' + tail;
  84 }
  85
  86
  87 string const dvipdfm_options(BufferParams const & bp)
  88 {
  89         string result;
  90
  91         if (bp.papersize != PAPER_CUSTOM) {
  92                 string const paper_size = bp.paperSizeName();
  93                 if (paper_size != "b5" && paper_size != "foolscap")
  94                         result = "-p "+ paper_size;
  95
  96                 if (bp.orientation == ORIENTATION_LANDSCAPE)
  97                         result += " -l";
  98         }
  99
 100         return result;
 101 }
 102
 103
 104 class ConverterEqual {
 105 public:
 106         ConverterEqual(string const & from, string const & to)
 107                 : from_(from), to_(to) {}
 108         bool operator()(Converter const & c) const {
 109                 return c.from == from_ && c.to == to_;
 110         }
 111 private:
 112         string const from_;
 113         string const to_;
 114 };
 115
 116 } // namespace anon
 117
 118
 119 Converter::Converter(string const & f, string const & t,
 120                      string const & c, string const & l)
 121         : from(f), to(t), command(c), flags(l),
 122           From(0), To(0), latex(false), xml(false),
 123           need_aux(false)
 124 {}
 125
 126
 127 void Converter::readFlags()
 128 {
 129         string flag_list(flags);
 130         while (!flag_list.empty()) {
 131                 string flag_name, flag_value;
 132                 flag_list = split(flag_list, flag_value, ',');
 133                 flag_value = split(flag_value, flag_name, '=');
 134                 if (flag_name == "latex")
 135                         latex = true;
 136                 else if (flag_name == "xml")
 137                         xml = true;
 138                 else if (flag_name == "needaux")
 139                         need_aux = true;
 140                 else if (flag_name == "resultdir")
 141                         result_dir = (flag_value.empty())
 142                                 ? token_base : flag_value;
 143                 else if (flag_name == "resultfile")
 144                         result_file = flag_value;
 145                 else if (flag_name == "parselog")
 146                         parselog = flag_value;
 147         }
 148         if (!result_dir.empty() && result_file.empty())
 149                 result_file = "index." + formats.extension(to);
 150         //if (!contains(command, token_from))
 151         //      latex = true;
 152 }
 153
 154
 155 bool operator<(Converter const & a, Converter const & b)
 156 {
 157         // use the compare_ascii_no_case instead of compare_no_case,
 158         // because in turkish, 'i' is not the lowercase version of 'I',
 159         // and thus turkish locale breaks parsing of tags.
 160         int const i = compare_ascii_no_case(a.From->prettyname(),
 161                                             b.From->prettyname());
 162         if (i == 0)
 163                 return compare_ascii_no_case(a.To->prettyname(),
 164                                              b.To->prettyname()) < 0;
 165         else
 166                 return i < 0;
 167 }
 168
 169
 170 Converter const * Converters::getConverter(string const & from,
 171                                             string const & to) const
 172 {
 173         ConverterList::const_iterator const cit =
 174                 find_if(converterlist_.begin(), converterlist_.end(),
 175                         ConverterEqual(from, to));
 176         if (cit != converterlist_.end())
 177                 return &(*cit);
 178         else
 179                 return 0;
 180 }
 181
 182
 183 int Converters::getNumber(string const & from, string const & to) const
 184 {
 185         ConverterList::const_iterator const cit =
 186                 find_if(converterlist_.begin(), converterlist_.end(),
 187                         ConverterEqual(from, to));
 188         if (cit != converterlist_.end())
 189                 return distance(converterlist_.begin(), cit);
 190         else
 191                 return -1;
 192 }
 193
 194
 195 void Converters::add(string const & from, string const & to,
 196                      string const & command, string const & flags)
 197 {
 198         formats.add(from);
 199         formats.add(to);
 200         ConverterList::iterator it = find_if(converterlist_.begin(),
 201                                              converterlist_.end(),
 202                                              ConverterEqual(from , to));
 203
 204         Converter converter(from, to, command, flags);
 205         if (it != converterlist_.end() && !flags.empty() && flags[0] == '*') {
 206                 converter = *it;
 207                 converter.command = command;
 208                 converter.flags = flags;
 209         }
 210         converter.readFlags();
 211
 212         if (converter.latex && (latex_command_.empty() || to == "dvi"))
 213                 latex_command_ = subst(command, token_from, "");
 214         // If we have both latex & pdflatex, we set latex_command to latex.
 215         // The latex_command is used to update the .aux file when running
 216         // a converter that uses it.
 217
 218         if (it == converterlist_.end()) {
 219                 converterlist_.push_back(converter);
 220         } else {
 221                 converter.From = it->From;
 222                 converter.To = it->To;
 223                 *it = converter;
 224         }
 225 }
 226
 227
 228 void Converters::erase(string const & from, string const & to)
 229 {
 230         ConverterList::iterator const it =
 231                 find_if(converterlist_.begin(),
 232                         converterlist_.end(),
 233                         ConverterEqual(from, to));
 234         if (it != converterlist_.end())
 235                 converterlist_.erase(it);
 236 }
 237
 238
 239 // This method updates the pointers From and To in all the converters.
 240 // The code is not very efficient, but it doesn't matter as the number
 241 // of formats and converters is small.
 242 // Furthermore, this method is called only on startup, or after
 243 // adding/deleting a format in FormPreferences (the latter calls can be
 244 // eliminated if the formats in the Formats class are stored using a map or
 245 // a list (instead of a vector), but this will cause other problems).
 246 void Converters::update(Formats const & formats)
 247 {
 248         ConverterList::iterator it = converterlist_.begin();
 249         ConverterList::iterator end = converterlist_.end();
 250         for (; it != end; ++it) {
 251                 it->From = formats.getFormat(it->from);
 252                 it->To = formats.getFormat(it->to);
 253         }
 254 }
 255
 256
 257 // This method updates the pointers From and To in the last converter.
 258 // It is called when adding a new converter in FormPreferences
 259 void Converters::updateLast(Formats const & formats)
 260 {
 261         if (converterlist_.begin() != converterlist_.end()) {
 262                 ConverterList::iterator it = converterlist_.end() - 1;
 263                 it->From = formats.getFormat(it->from);
 264                 it->To = formats.getFormat(it->to);
 265         }
 266 }
 267
 268
 269 void Converters::sort()
 270 {
 271         std::sort(converterlist_.begin(), converterlist_.end());
 272 }
 273
 274
 275 OutputParams::FLAVOR Converters::getFlavor(Graph::EdgePath const & path)
 276 {
 277         for (Graph::EdgePath::const_iterator cit = path.begin();
 278              cit != path.end(); ++cit) {
 279                 Converter const & conv = converterlist_[*cit];
 280                 if (conv.latex)
 281                         if (contains(conv.to, "pdf"))
 282                                 return OutputParams::PDFLATEX;
 283                 if (conv.xml)
 284                         return OutputParams::XML;
 285         }
 286         return OutputParams::LATEX;
 287 }
 288
 289
 290 bool Converters::convert(Buffer const * buffer,
 291                          FileName const & from_file, FileName const & to_file,
 292                          FileName const & orig_from,
 293                          string const & from_format, string const & to_format,
 294                          ErrorList & errorList, int conversionflags)
 295 {
 296         if (from_format == to_format)
 297                 return move(from_format, from_file, to_file, false);
 298
 299         if ((conversionflags & try_cache) &&
 300             ConverterCache::get().inCache(orig_from, to_format))
 301                 return ConverterCache::get().copy(orig_from, to_format, to_file);
 302
 303         Graph::EdgePath edgepath = getPath(from_format, to_format);
 304         if (edgepath.empty()) {
 305                 if (conversionflags & try_default) {
 306                         // if no special converter defined, then we take the
 307                         // default one from ImageMagic.
 308                         string const from_ext = from_format.empty() ?
 309                                 getExtension(from_file.absFilename()) :
 310                                 formats.extension(from_format);
 311                         string const to_ext = formats.extension(to_format);
 312                         string const command =
 313                                 support::os::python() + ' ' +
 314                                 quoteName(libFileSearch("scripts", "convertDefault.py").toFilesystemEncoding()) +
 315                                 ' ' +
 316                                 quoteName(from_ext + ':' + from_file.toFilesystemEncoding()) +
 317                                 ' ' +
 318                                 quoteName(to_ext + ':' + to_file.toFilesystemEncoding());
 319                         LYXERR(Debug::FILES, "No converter defined! "
 320                                    "I use convertDefault.py:\n\t" << command);
 321                         Systemcall one;
 322                         one.startscript(Systemcall::Wait, command);
 323                         if (to_file.isFileReadable()) {
 324                                 if (conversionflags & try_cache)
 325                                         ConverterCache::get().add(orig_from,
 326                                                         to_format, to_file);
 327                                 return true;
 328                         }
 329                 }
 330                 Alert::error(_("Cannot convert file"),
 331                              bformat(_("No information for converting %1$s "
 332                                                     "format files to %2$s.\n"
 333                                                     "Define a converter in the preferences."),
 334                                                         from_ascii(from_format), from_ascii(to_format)));
 335                 return false;
 336         }
 337
 338         // buffer is only invalid for importing, and then runparams is not
 339         // used anyway.
 340         OutputParams runparams(buffer ? &buffer->params().encoding() : 0);
 341         runparams.flavor = getFlavor(edgepath);
 342
 343         // Some converters (e.g. lilypond) can only output files to the
 344         // current directory, so we need to change the current directory.
 345         // This has the added benefit that all other files that may be
 346         // generated by the converter are deleted when LyX closes and do not
 347         // clutter the real working directory.
 348         string const path(onlyPath(from_file.absFilename()));
 349         // Prevent the compiler from optimizing away p
 350         FileName pp(path);
 351         support::PathChanger p(pp);
 352
 353         // empty the error list before any new conversion takes place.
 354         errorList.clear();
 355
 356         bool run_latex = false;
 357         string from_base = changeExtension(from_file.absFilename(), "");
 358         string to_base = changeExtension(to_file.absFilename(), "");
 359         FileName infile;
 360         FileName outfile = from_file;
 361         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 362              cit != edgepath.end(); ++cit) {
 363                 Converter const & conv = converterlist_[*cit];
 364                 bool dummy = conv.To->dummy() && conv.to != "program";
 365                 if (!dummy) {
 366                         LYXERR(Debug::FILES, "Converting from  "
 367                                << conv.from << " to " << conv.to);
 368                 }
 369                 infile = outfile;
 370                 outfile = FileName(conv.result_dir.empty()
 371                         ? changeExtension(from_file.absFilename(), conv.To->extension())
 372                         : addName(subst(conv.result_dir,
 373                                         token_base, from_base),
 374                                   subst(conv.result_file,
 375                                         token_base, onlyFilename(from_base))));
 376
 377                 // if input and output files are equal, we use a
 378                 // temporary file as intermediary (JMarc)
 379                 FileName real_outfile;
 380                 if (outfile == infile) {
 381                         real_outfile = infile;
 382                         // when importing, a buffer does not necessarily exist
 383                         if (buffer)
 384                                 outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 385                         else
 386                                 outfile = FileName(addName(package().temp_dir().absFilename(),
 387                                                    "tmpfile.out"));
 388                 }
 389
 390                 if (conv.latex) {
 391                         run_latex = true;
 392                         string const command = subst(conv.command, token_from, "");
 393                         LYXERR(Debug::FILES, "Running " << command);
 394                         if (!runLaTeX(*buffer, command, runparams, errorList))
 395                                 return false;
 396                 } else {
 397                         if (conv.need_aux && !run_latex
 398                             && !latex_command_.empty()) {
 399                                 LYXERR(Debug::FILES, "Running " << latex_command_
 400                                         << " to update aux file");
 401                                 runLaTeX(*buffer, latex_command_, runparams, errorList);
 402                         }
 403
 404                         // FIXME UNICODE
 405                         string const infile2 =
 406                                 to_utf8(makeRelPath(from_utf8(infile.absFilename()), from_utf8(path)));
 407                         string const outfile2 =
 408                                 to_utf8(makeRelPath(from_utf8(outfile.absFilename()), from_utf8(path)));
 409
 410                         string command = conv.command;
 411                         command = subst(command, token_from, quoteName(infile2));
 412                         command = subst(command, token_base, quoteName(from_base));
 413                         command = subst(command, token_to, quoteName(outfile2));
 414                         command = libScriptSearch(command);
 415
 416                         if (!conv.parselog.empty())
 417                                 command += " 2> " + quoteName(infile2 + ".out");
 418
 419                         if (conv.from == "dvi" && conv.to == "ps")
 420                                 command = add_options(command,
 421                                                       buffer->params().dvips_options());
 422                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 423                                 command = add_options(command,
 424                                                       dvipdfm_options(buffer->params()));
 425
 426                         LYXERR(Debug::FILES, "Calling " << command);
 427                         if (buffer)
 428                                 buffer->message(_("Executing command: ")
 429                                 + from_utf8(command));
 430
 431                         Systemcall one;
 432                         int res;
 433                         if (dummy) {
 434                                 res = one.startscript(Systemcall::DontWait,
 435                                         to_filesystem8bit(from_utf8(command)));
 436                                 // We're not waiting for the result, so we can't do anything
 437                                 // else here.
 438                         } else {
 439                                 res = one.startscript(Systemcall::Wait,
 440                                                 to_filesystem8bit(from_utf8(command)));
 441                                 if (!real_outfile.empty()) {
 442                                         Mover const & mover = getMover(conv.to);
 443                                         if (!mover.rename(outfile, real_outfile))
 444                                                 res = -1;
 445                                         else
 446                                                 LYXERR(Debug::FILES, "renaming file " << outfile
 447                                                         << " to " << real_outfile);
 448                                         // Finally, don't forget to tell any future
 449                                         // converters to use the renamed file...
 450                                         outfile = real_outfile;
 451                                 }
 452
 453                                 if (!conv.parselog.empty()) {
 454                                         string const logfile =  infile2 + ".log";
 455                                         string const script = libScriptSearch(conv.parselog);
 456                                         string const command2 = script +
 457                                                 " < " + quoteName(infile2 + ".out") +
 458                                                 " > " + quoteName(logfile);
 459                                         one.startscript(Systemcall::Wait,
 460                                                 to_filesystem8bit(from_utf8(command2)));
 461                                         if (!scanLog(*buffer, command, makeAbsPath(logfile, path), errorList))
 462                                                 return false;
 463                                 }
 464                         }
 465
 466                         if (res) {
 467                                 if (conv.to == "program") {
 468                                         Alert::error(_("Build errors"),
 469                                                 _("There were errors during the build process."));
 470                                 } else {
 471 // FIXME: this should go out of here. For example, here we cannot say if
 472 // it is a document (.lyx) or something else. Same goes for elsewhere.
 473                                         Alert::error(_("Cannot convert file"),
 474                                                 bformat(_("An error occurred whilst running %1$s"),
 475                                                 from_utf8(command.substr(0, 50))));
 476                                 }
 477                                 return false;
 478                         }
 479                 }
 480         }
 481
 482         Converter const & conv = converterlist_[edgepath.back()];
 483         if (conv.To->dummy())
 484                 return true;
 485
 486         if (!conv.result_dir.empty()) {
 487                 // The converter has put the file(s) in a directory.
 488                 // In this case we ignore the given to_file.
 489                 if (from_base != to_base) {
 490                         string const from = subst(conv.result_dir,
 491                                             token_base, from_base);
 492                         string const to = subst(conv.result_dir,
 493                                           token_base, to_base);
 494                         Mover const & mover = getMover(conv.from);
 495                         if (!mover.rename(FileName(from), FileName(to))) {
 496                                 Alert::error(_("Cannot convert file"),
 497                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 498                                                 from_utf8(from), from_utf8(to)));
 499                                 return false;
 500                         }
 501                 }
 502                 return true;
 503         } else {
 504                 if (conversionflags & try_cache)
 505                         ConverterCache::get().add(orig_from, to_format, outfile);
 506                 return move(conv.to, outfile, to_file, conv.latex);
 507         }
 508 }
 509
 510
 511 bool Converters::move(string const & fmt,
 512                       FileName const & from, FileName const & to, bool copy)
 513 {
 514         if (from == to)
 515                 return true;
 516
 517         bool no_errors = true;
 518         string const path = onlyPath(from.absFilename());
 519         string const base = onlyFilename(removeExtension(from.absFilename()));
 520         string const to_base = removeExtension(to.absFilename());
 521         string const to_extension = getExtension(to.absFilename());
 522
 523         vector<FileName> const files = dirList(FileName(path),
 524                         getExtension(from.absFilename()));
 525         for (vector<FileName>::const_iterator it = files.begin();
 526              it != files.end(); ++it) {
 527                 string const from2 = it->absFilename();
 528                 string const file2 = onlyFilename(from2);
 529                 if (prefixIs(file2, base)) {
 530                         string const to2 = changeExtension(
 531                                 to_base + file2.substr(base.length()),
 532                                 to_extension);
 533                         LYXERR(Debug::FILES, "moving " << from2 << " to " << to2);
 534
 535                         Mover const & mover = getMover(fmt);
 536                         bool const moved = copy
 537                                 ? mover.copy(*it, FileName(to2))
 538                                 : mover.rename(*it, FileName(to2));
 539                         if (!moved && no_errors) {
 540                                 Alert::error(_("Cannot convert file"),
 541                                         bformat(copy ?
 542                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 543                                                 _("Could not move a temporary file from %1$s to %2$s."),
 544                                                 from_utf8(from2), from_utf8(to2)));
 545                                 no_errors = false;
 546                         }
 547                 }
 548         }
 549         return no_errors;
 550 }
 551
 552
 553 bool Converters::formatIsUsed(string const & format)
 554 {
 555         ConverterList::const_iterator cit = converterlist_.begin();
 556         ConverterList::const_iterator end = converterlist_.end();
 557         for (; cit != end; ++cit) {
 558                 if (cit->from == format || cit->to == format)
 559                         return true;
 560         }
 561         return false;
 562 }
 563
 564
 565 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 566                          FileName const & filename, ErrorList & errorList)
 567 {
 568         OutputParams runparams(0);
 569         runparams.flavor = OutputParams::LATEX;
 570         LaTeX latex("", runparams, filename);
 571         TeXErrors terr;
 572         int const result = latex.scanLogFile(terr);
 573
 574         if (result & LaTeX::ERRORS)
 575                 buffer.bufferErrors(terr, errorList);
 576
 577         return true;
 578 }
 579
 580
 581 namespace {
 582
 583 class ShowMessage
 584         : public boost::signals::trackable {
 585 public:
 586         ShowMessage(Buffer const & b) : buffer_(b) {}
 587         void operator()(docstring const & msg) const { buffer_.message(msg); }
 588 private:
 589         Buffer const & buffer_;
 590 };
 591
 592 }
 593
 594
 595 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 596                           OutputParams const & runparams, ErrorList & errorList)
 597 {
 598         buffer.setBusy(true);
 599         buffer.message(_("Running LaTeX..."));
 600
 601         runparams.document_language = buffer.params().language->babel();
 602
 603         // do the LaTeX run(s)
 604         string const name = buffer.latexName();
 605         LaTeX latex(command, runparams, FileName(makeAbsPath(name)));
 606         TeXErrors terr;
 607         ShowMessage show(buffer);
 608         latex.message.connect(show);
 609         int const result = latex.run(terr);
 610
 611         if (result & LaTeX::ERRORS)
 612                 buffer.bufferErrors(terr, errorList);
 613
 614         // check return value from latex.run().
 615         if ((result & LaTeX::NO_LOGFILE)) {
 616                 docstring const str =
 617                         bformat(_("LaTeX did not run successfully. "
 618                                                "Additionally, LyX could not locate "
 619                                                "the LaTeX log %1$s."), from_utf8(name));
 620                 Alert::error(_("LaTeX failed"), str);
 621         } else if (result & LaTeX::NO_OUTPUT) {
 622                 Alert::warning(_("Output is empty"),
 623                                _("An empty output file was generated."));
 624         }
 625
 626
 627         buffer.setBusy(false);
 628
 629         int const ERROR_MASK =
 630                         LaTeX::NO_LOGFILE |
 631                         LaTeX::ERRORS |
 632                         LaTeX::NO_OUTPUT;
 633
 634         return (result & ERROR_MASK) == 0;
 635
 636 }
 637
 638
 639
 640 void Converters::buildGraph()
 641 {
 642         G_.init(formats.size());
 643         ConverterList::iterator beg = converterlist_.begin();
 644         ConverterList::iterator const end = converterlist_.end();
 645         for (ConverterList::iterator it = beg; it != end ; ++it) {
 646                 int const s = formats.getNumber(it->from);
 647                 int const t = formats.getNumber(it->to);
 648                 G_.addEdge(s,t);
 649         }
 650 }
 651
 652
 653 std::vector<Format const *> const
 654 Converters::intToFormat(std::vector<int> const & input)
 655 {
 656         vector<Format const *> result(input.size());
 657
 658         vector<int>::const_iterator it = input.begin();
 659         vector<int>::const_iterator const end = input.end();
 660         vector<Format const *>::iterator rit = result.begin();
 661         for ( ; it != end; ++it, ++rit) {
 662                 *rit = &formats.get(*it);
 663         }
 664         return result;
 665 }
 666
 667
 668 vector<Format const *> const
 669 Converters::getReachableTo(string const & target, bool const clear_visited)
 670 {
 671         vector<int> const & reachablesto =
 672                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 673
 674         return intToFormat(reachablesto);
 675 }
 676
 677
 678 vector<Format const *> const
 679 Converters::getReachable(string const & from, bool const only_viewable,
 680                          bool const clear_visited)
 681 {
 682         vector<int> const & reachables =
 683                 G_.getReachable(formats.getNumber(from),
 684                                 only_viewable,
 685                                 clear_visited);
 686
 687         return intToFormat(reachables);
 688 }
 689
 690
 691 bool Converters::isReachable(string const & from, string const & to)
 692 {
 693         return G_.isReachable(formats.getNumber(from),
 694                               formats.getNumber(to));
 695 }
 696
 697
 698 Graph::EdgePath Converters::getPath(string const & from, string const & to)
 699 {
 700         return G_.getPath(formats.getNumber(from),
 701                           formats.getNumber(to));
 702 }
 703
 704
 705 vector<Format const *> Converters::importableFormats()
 706 {
 707         vector<string> l = loaders();
 708         vector<Format const *> result = getReachableTo(l[0], true);
 709         for (vector<string>::const_iterator it = l.begin() + 1;
 710              it != l.end(); ++it) {
 711                 vector<Format const *> r = getReachableTo(*it, false);
 712                 result.insert(result.end(), r.begin(), r.end());
 713         }
 714         return result;
 715 }
 716
 717
 718 vector<string> Converters::loaders() const
 719 {
 720         vector<string> v;
 721         v.push_back("lyx");
 722         v.push_back("text");
 723         v.push_back("textparagraph");
 724         return v;
 725 }
 726
 727
 728 } // namespace lyx