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/FileZipListDir.h"
  31 #include "support/gettext.h"
  32 #include "support/lstrings.h"
  33 #include "support/lyxlib.h"
  34 #include "support/os.h"
  35 #include "support/Package.h"
  36 #include "support/Path.h"
  37 #include "support/Systemcall.h"
  38
  39 using namespace std;
  40
  41 namespace lyx {
  42
  43 using support::addName;
  44 using support::bformat;
  45 using support::changeExtension;
  46 using support::compare_ascii_no_case;
  47 using support::contains;
  48 using support::FileName;
  49 using support::FileNameList;
  50 using support::getExtension;
  51 using support::libFileSearch;
  52 using support::libScriptSearch;
  53 using support::makeAbsPath;
  54 using support::makeRelPath;
  55 using support::onlyFilename;
  56 using support::onlyPath;
  57 using support::package;
  58 using support::prefixIs;
  59 using support::quoteName;
  60 using support::removeExtension;
  61 using support::split;
  62 using support::subst;
  63 using support::Systemcall;
  64
  65 namespace Alert = lyx::frontend::Alert;
  66
  67
  68 namespace {
  69
  70 string const token_from("$$i");
  71 string const token_base("$$b");
  72 string const token_to("$$o");
  73 string const token_path("$$p");
  74
  75
  76
  77 string const add_options(string const & command, string const & options)
  78 {
  79         string head;
  80         string const tail = split(command, head, ' ');
  81         return head + ' ' + options + ' ' + tail;
  82 }
  83
  84
  85 string const dvipdfm_options(BufferParams const & bp)
  86 {
  87         string result;
  88
  89         if (bp.papersize != PAPER_CUSTOM) {
  90                 string const paper_size = bp.paperSizeName();
  91                 if (paper_size != "b5" && paper_size != "foolscap")
  92                         result = "-p "+ paper_size;
  93
  94                 if (bp.orientation == ORIENTATION_LANDSCAPE)
  95                         result += " -l";
  96         }
  97
  98         return result;
  99 }
 100
 101
 102 class ConverterEqual {
 103 public:
 104         ConverterEqual(string const & from, string const & to)
 105                 : from_(from), to_(to) {}
 106         bool operator()(Converter const & c) const {
 107                 return c.from == from_ && c.to == to_;
 108         }
 109 private:
 110         string const from_;
 111         string const to_;
 112 };
 113
 114 } // namespace anon
 115
 116
 117 Converter::Converter(string const & f, string const & t,
 118                      string const & c, string const & l)
 119         : from(f), to(t), command(c), flags(l),
 120           From(0), To(0), latex(false), xml(false),
 121           need_aux(false)
 122 {}
 123
 124
 125 void Converter::readFlags()
 126 {
 127         string flag_list(flags);
 128         while (!flag_list.empty()) {
 129                 string flag_name, flag_value;
 130                 flag_list = split(flag_list, flag_value, ',');
 131                 flag_value = split(flag_value, flag_name, '=');
 132                 if (flag_name == "latex")
 133                         latex = true;
 134                 else if (flag_name == "xml")
 135                         xml = true;
 136                 else if (flag_name == "needaux")
 137                         need_aux = true;
 138                 else if (flag_name == "resultdir")
 139                         result_dir = (flag_value.empty())
 140                                 ? token_base : flag_value;
 141                 else if (flag_name == "resultfile")
 142                         result_file = flag_value;
 143                 else if (flag_name == "parselog")
 144                         parselog = flag_value;
 145         }
 146         if (!result_dir.empty() && result_file.empty())
 147                 result_file = "index." + formats.extension(to);
 148         //if (!contains(command, token_from))
 149         //      latex = true;
 150 }
 151
 152
 153 bool operator<(Converter const & a, Converter const & b)
 154 {
 155         // use the compare_ascii_no_case instead of compare_no_case,
 156         // because in turkish, 'i' is not the lowercase version of 'I',
 157         // and thus turkish locale breaks parsing of tags.
 158         int const i = compare_ascii_no_case(a.From->prettyname(),
 159                                             b.From->prettyname());
 160         if (i == 0)
 161                 return compare_ascii_no_case(a.To->prettyname(),
 162                                              b.To->prettyname()) < 0;
 163         else
 164                 return i < 0;
 165 }
 166
 167
 168 Converter const * Converters::getConverter(string const & from,
 169                                             string const & to) const
 170 {
 171         ConverterList::const_iterator const cit =
 172                 find_if(converterlist_.begin(), converterlist_.end(),
 173                         ConverterEqual(from, to));
 174         if (cit != converterlist_.end())
 175                 return &(*cit);
 176         else
 177                 return 0;
 178 }
 179
 180
 181 int Converters::getNumber(string const & from, string const & to) const
 182 {
 183         ConverterList::const_iterator const cit =
 184                 find_if(converterlist_.begin(), converterlist_.end(),
 185                         ConverterEqual(from, to));
 186         if (cit != converterlist_.end())
 187                 return distance(converterlist_.begin(), cit);
 188         else
 189                 return -1;
 190 }
 191
 192
 193 void Converters::add(string const & from, string const & to,
 194                      string const & command, string const & flags)
 195 {
 196         formats.add(from);
 197         formats.add(to);
 198         ConverterList::iterator it = find_if(converterlist_.begin(),
 199                                              converterlist_.end(),
 200                                              ConverterEqual(from , to));
 201
 202         Converter converter(from, to, command, flags);
 203         if (it != converterlist_.end() && !flags.empty() && flags[0] == '*') {
 204                 converter = *it;
 205                 converter.command = command;
 206                 converter.flags = flags;
 207         }
 208         converter.readFlags();
 209
 210         if (converter.latex && (latex_command_.empty() || to == "dvi"))
 211                 latex_command_ = subst(command, token_from, "");
 212         // If we have both latex & pdflatex, we set latex_command to latex.
 213         // The latex_command is used to update the .aux file when running
 214         // a converter that uses it.
 215
 216         if (it == converterlist_.end()) {
 217                 converterlist_.push_back(converter);
 218         } else {
 219                 converter.From = it->From;
 220                 converter.To = it->To;
 221                 *it = converter;
 222         }
 223 }
 224
 225
 226 void Converters::erase(string const & from, string const & to)
 227 {
 228         ConverterList::iterator const it =
 229                 find_if(converterlist_.begin(),
 230                         converterlist_.end(),
 231                         ConverterEqual(from, to));
 232         if (it != converterlist_.end())
 233                 converterlist_.erase(it);
 234 }
 235
 236
 237 // This method updates the pointers From and To in all the converters.
 238 // The code is not very efficient, but it doesn't matter as the number
 239 // of formats and converters is small.
 240 // Furthermore, this method is called only on startup, or after
 241 // adding/deleting a format in FormPreferences (the latter calls can be
 242 // eliminated if the formats in the Formats class are stored using a map or
 243 // a list (instead of a vector), but this will cause other problems).
 244 void Converters::update(Formats const & formats)
 245 {
 246         ConverterList::iterator it = converterlist_.begin();
 247         ConverterList::iterator end = converterlist_.end();
 248         for (; it != end; ++it) {
 249                 it->From = formats.getFormat(it->from);
 250                 it->To = formats.getFormat(it->to);
 251         }
 252 }
 253
 254
 255 // This method updates the pointers From and To in the last converter.
 256 // It is called when adding a new converter in FormPreferences
 257 void Converters::updateLast(Formats const & formats)
 258 {
 259         if (converterlist_.begin() != converterlist_.end()) {
 260                 ConverterList::iterator it = converterlist_.end() - 1;
 261                 it->From = formats.getFormat(it->from);
 262                 it->To = formats.getFormat(it->to);
 263         }
 264 }
 265
 266
 267 void Converters::sort()
 268 {
 269         std::sort(converterlist_.begin(), converterlist_.end());
 270 }
 271
 272
 273 OutputParams::FLAVOR Converters::getFlavor(Graph::EdgePath const & path)
 274 {
 275         for (Graph::EdgePath::const_iterator cit = path.begin();
 276              cit != path.end(); ++cit) {
 277                 Converter const & conv = converterlist_[*cit];
 278                 if (conv.latex)
 279                         if (contains(conv.to, "pdf"))
 280                                 return OutputParams::PDFLATEX;
 281                 if (conv.xml)
 282                         return OutputParams::XML;
 283         }
 284         return OutputParams::LATEX;
 285 }
 286
 287
 288 bool Converters::convert(Buffer const * buffer,
 289                          FileName const & from_file, FileName const & to_file,
 290                          FileName const & orig_from,
 291                          string const & from_format, string const & to_format,
 292                          ErrorList & errorList, int conversionflags)
 293 {
 294         if (from_format == to_format)
 295                 return move(from_format, from_file, to_file, false);
 296
 297         if ((conversionflags & try_cache) &&
 298             ConverterCache::get().inCache(orig_from, to_format))
 299                 return ConverterCache::get().copy(orig_from, to_format, to_file);
 300
 301         Graph::EdgePath edgepath = getPath(from_format, to_format);
 302         if (edgepath.empty()) {
 303                 if (conversionflags & try_default) {
 304                         // if no special converter defined, then we take the
 305                         // default one from ImageMagic.
 306                         string const from_ext = from_format.empty() ?
 307                                 getExtension(from_file.absFilename()) :
 308                                 formats.extension(from_format);
 309                         string const to_ext = formats.extension(to_format);
 310                         string const command =
 311                                 support::os::python() + ' ' +
 312                                 quoteName(libFileSearch("scripts", "convertDefault.py").toFilesystemEncoding()) +
 313                                 ' ' +
 314                                 quoteName(from_ext + ':' + from_file.toFilesystemEncoding()) +
 315                                 ' ' +
 316                                 quoteName(to_ext + ':' + to_file.toFilesystemEncoding());
 317                         LYXERR(Debug::FILES, "No converter defined! "
 318                                    "I use convertDefault.py:\n\t" << command);
 319                         Systemcall one;
 320                         one.startscript(Systemcall::Wait, command);
 321                         if (to_file.isReadableFile()) {
 322                                 if (conversionflags & try_cache)
 323                                         ConverterCache::get().add(orig_from,
 324                                                         to_format, to_file);
 325                                 return true;
 326                         }
 327                 }
 328                 Alert::error(_("Cannot convert file"),
 329                              bformat(_("No information for converting %1$s "
 330                                                     "format files to %2$s.\n"
 331                                                     "Define a converter in the preferences."),
 332                                                         from_ascii(from_format), from_ascii(to_format)));
 333                 return false;
 334         }
 335
 336         // buffer is only invalid for importing, and then runparams is not
 337         // used anyway.
 338         OutputParams runparams(buffer ? &buffer->params().encoding() : 0);
 339         runparams.flavor = getFlavor(edgepath);
 340
 341         // Some converters (e.g. lilypond) can only output files to the
 342         // current directory, so we need to change the current directory.
 343         // This has the added benefit that all other files that may be
 344         // generated by the converter are deleted when LyX closes and do not
 345         // clutter the real working directory.
 346         string const path(onlyPath(from_file.absFilename()));
 347         // Prevent the compiler from optimizing away p
 348         FileName pp(path);
 349         support::PathChanger p(pp);
 350
 351         // empty the error list before any new conversion takes place.
 352         errorList.clear();
 353
 354         bool run_latex = false;
 355         string from_base = changeExtension(from_file.absFilename(), "");
 356         string to_base = changeExtension(to_file.absFilename(), "");
 357         FileName infile;
 358         FileName outfile = from_file;
 359         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 360              cit != edgepath.end(); ++cit) {
 361                 Converter const & conv = converterlist_[*cit];
 362                 bool dummy = conv.To->dummy() && conv.to != "program";
 363                 if (!dummy) {
 364                         LYXERR(Debug::FILES, "Converting from  "
 365                                << conv.from << " to " << conv.to);
 366                 }
 367                 infile = outfile;
 368                 outfile = FileName(conv.result_dir.empty()
 369                         ? changeExtension(from_file.absFilename(), conv.To->extension())
 370                         : addName(subst(conv.result_dir,
 371                                         token_base, from_base),
 372                                   subst(conv.result_file,
 373                                         token_base, onlyFilename(from_base))));
 374
 375                 // if input and output files are equal, we use a
 376                 // temporary file as intermediary (JMarc)
 377                 FileName real_outfile;
 378                 if (outfile == infile) {
 379                         real_outfile = infile;
 380                         // when importing, a buffer does not necessarily exist
 381                         if (buffer)
 382                                 outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 383                         else
 384                                 outfile = FileName(addName(package().temp_dir().absFilename(),
 385                                                    "tmpfile.out"));
 386                 }
 387
 388                 if (conv.latex) {
 389                         run_latex = true;
 390                         string const command = subst(conv.command, token_from, "");
 391                         LYXERR(Debug::FILES, "Running " << command);
 392                         if (!runLaTeX(*buffer, command, runparams, errorList))
 393                                 return false;
 394                 } else {
 395                         if (conv.need_aux && !run_latex
 396                             && !latex_command_.empty()) {
 397                                 LYXERR(Debug::FILES, "Running " << latex_command_
 398                                         << " to update aux file");
 399                                 runLaTeX(*buffer, latex_command_, runparams, errorList);
 400                         }
 401
 402                         // FIXME UNICODE
 403                         string const infile2 =
 404                                 to_utf8(makeRelPath(from_utf8(infile.absFilename()), from_utf8(path)));
 405                         string const outfile2 =
 406                                 to_utf8(makeRelPath(from_utf8(outfile.absFilename()), from_utf8(path)));
 407
 408                         string command = conv.command;
 409                         command = subst(command, token_from, quoteName(infile2));
 410                         command = subst(command, token_base, quoteName(from_base));
 411                         command = subst(command, token_to, quoteName(outfile2));
 412                         command = libScriptSearch(command);
 413
 414                         if (!conv.parselog.empty())
 415                                 command += " 2> " + quoteName(infile2 + ".out");
 416
 417                         if (conv.from == "dvi" && conv.to == "ps")
 418                                 command = add_options(command,
 419                                                       buffer->params().dvips_options());
 420                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 421                                 command = add_options(command,
 422                                                       dvipdfm_options(buffer->params()));
 423
 424                         LYXERR(Debug::FILES, "Calling " << command);
 425                         if (buffer)
 426                                 buffer->message(_("Executing command: ")
 427                                 + from_utf8(command));
 428
 429                         Systemcall one;
 430                         int res;
 431                         if (dummy) {
 432                                 res = one.startscript(Systemcall::DontWait,
 433                                         to_filesystem8bit(from_utf8(command)));
 434                                 // We're not waiting for the result, so we can't do anything
 435                                 // else here.
 436                         } else {
 437                                 res = one.startscript(Systemcall::Wait,
 438                                                 to_filesystem8bit(from_utf8(command)));
 439                                 if (!real_outfile.empty()) {
 440                                         Mover const & mover = getMover(conv.to);
 441                                         if (!mover.rename(outfile, real_outfile))
 442                                                 res = -1;
 443                                         else
 444                                                 LYXERR(Debug::FILES, "renaming file " << outfile
 445                                                         << " to " << real_outfile);
 446                                         // Finally, don't forget to tell any future
 447                                         // converters to use the renamed file...
 448                                         outfile = real_outfile;
 449                                 }
 450
 451                                 if (!conv.parselog.empty()) {
 452                                         string const logfile =  infile2 + ".log";
 453                                         string const script = libScriptSearch(conv.parselog);
 454                                         string const command2 = script +
 455                                                 " < " + quoteName(infile2 + ".out") +
 456                                                 " > " + quoteName(logfile);
 457                                         one.startscript(Systemcall::Wait,
 458                                                 to_filesystem8bit(from_utf8(command2)));
 459                                         if (!scanLog(*buffer, command, makeAbsPath(logfile, path), errorList))
 460                                                 return false;
 461                                 }
 462                         }
 463
 464                         if (res) {
 465                                 if (conv.to == "program") {
 466                                         Alert::error(_("Build errors"),
 467                                                 _("There were errors during the build process."));
 468                                 } else {
 469 // FIXME: this should go out of here. For example, here we cannot say if
 470 // it is a document (.lyx) or something else. Same goes for elsewhere.
 471                                         Alert::error(_("Cannot convert file"),
 472                                                 bformat(_("An error occurred whilst running %1$s"),
 473                                                 from_utf8(command.substr(0, 50))));
 474                                 }
 475                                 return false;
 476                         }
 477                 }
 478         }
 479
 480         Converter const & conv = converterlist_[edgepath.back()];
 481         if (conv.To->dummy())
 482                 return true;
 483
 484         if (!conv.result_dir.empty()) {
 485                 // The converter has put the file(s) in a directory.
 486                 // In this case we ignore the given to_file.
 487                 if (from_base != to_base) {
 488                         string const from = subst(conv.result_dir,
 489                                             token_base, from_base);
 490                         string const to = subst(conv.result_dir,
 491                                           token_base, to_base);
 492                         Mover const & mover = getMover(conv.from);
 493                         if (!mover.rename(FileName(from), FileName(to))) {
 494                                 Alert::error(_("Cannot convert file"),
 495                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 496                                                 from_utf8(from), from_utf8(to)));
 497                                 return false;
 498                         }
 499                 }
 500                 return true;
 501         } else {
 502                 if (conversionflags & try_cache)
 503                         ConverterCache::get().add(orig_from, to_format, outfile);
 504                 return move(conv.to, outfile, to_file, conv.latex);
 505         }
 506 }
 507
 508
 509 bool Converters::move(string const & fmt,
 510                       FileName const & from, FileName const & to, bool copy)
 511 {
 512         if (from == to)
 513                 return true;
 514
 515         bool no_errors = true;
 516         string const path = onlyPath(from.absFilename());
 517         string const base = onlyFilename(removeExtension(from.absFilename()));
 518         string const to_base = removeExtension(to.absFilename());
 519         string const to_extension = getExtension(to.absFilename());
 520
 521         FileNameList const files = FileName(path).dirList(getExtension(from.absFilename()));
 522         for (FileNameList::const_iterator it = files.begin();
 523              it != files.end(); ++it) {
 524                 string const from2 = it->absFilename();
 525                 string const file2 = onlyFilename(from2);
 526                 if (prefixIs(file2, base)) {
 527                         string const to2 = changeExtension(
 528                                 to_base + file2.substr(base.length()),
 529                                 to_extension);
 530                         LYXERR(Debug::FILES, "moving " << from2 << " to " << to2);
 531
 532                         Mover const & mover = getMover(fmt);
 533                         bool const moved = copy
 534                                 ? mover.copy(*it, FileName(to2))
 535                                 : mover.rename(*it, FileName(to2));
 536                         if (!moved && no_errors) {
 537                                 Alert::error(_("Cannot convert file"),
 538                                         bformat(copy ?
 539                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 540                                                 _("Could not move a temporary file from %1$s to %2$s."),
 541                                                 from_utf8(from2), from_utf8(to2)));
 542                                 no_errors = false;
 543                         }
 544                 }
 545         }
 546         return no_errors;
 547 }
 548
 549
 550 bool Converters::formatIsUsed(string const & format)
 551 {
 552         ConverterList::const_iterator cit = converterlist_.begin();
 553         ConverterList::const_iterator end = converterlist_.end();
 554         for (; cit != end; ++cit) {
 555                 if (cit->from == format || cit->to == format)
 556                         return true;
 557         }
 558         return false;
 559 }
 560
 561
 562 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 563                          FileName const & filename, ErrorList & errorList)
 564 {
 565         OutputParams runparams(0);
 566         runparams.flavor = OutputParams::LATEX;
 567         LaTeX latex("", runparams, filename);
 568         TeXErrors terr;
 569         int const result = latex.scanLogFile(terr);
 570
 571         if (result & LaTeX::ERRORS)
 572                 buffer.bufferErrors(terr, errorList);
 573
 574         return true;
 575 }
 576
 577
 578 namespace {
 579
 580 class ShowMessage
 581         : public boost::signals::trackable {
 582 public:
 583         ShowMessage(Buffer const & b) : buffer_(b) {}
 584         void operator()(docstring const & msg) const { buffer_.message(msg); }
 585 private:
 586         Buffer const & buffer_;
 587 };
 588
 589 }
 590
 591
 592 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 593                           OutputParams const & runparams, ErrorList & errorList)
 594 {
 595         buffer.setBusy(true);
 596         buffer.message(_("Running LaTeX..."));
 597
 598         runparams.document_language = buffer.params().language->babel();
 599
 600         // do the LaTeX run(s)
 601         string const name = buffer.latexName();
 602         LaTeX latex(command, runparams, FileName(makeAbsPath(name)));
 603         TeXErrors terr;
 604         ShowMessage show(buffer);
 605         latex.message.connect(show);
 606         int const result = latex.run(terr);
 607
 608         if (result & LaTeX::ERRORS)
 609                 buffer.bufferErrors(terr, errorList);
 610
 611         // check return value from latex.run().
 612         if ((result & LaTeX::NO_LOGFILE)) {
 613                 docstring const str =
 614                         bformat(_("LaTeX did not run successfully. "
 615                                                "Additionally, LyX could not locate "
 616                                                "the LaTeX log %1$s."), from_utf8(name));
 617                 Alert::error(_("LaTeX failed"), str);
 618         } else if (result & LaTeX::NO_OUTPUT) {
 619                 Alert::warning(_("Output is empty"),
 620                                _("An empty output file was generated."));
 621         }
 622
 623
 624         buffer.setBusy(false);
 625
 626         int const ERROR_MASK =
 627                         LaTeX::NO_LOGFILE |
 628                         LaTeX::ERRORS |
 629                         LaTeX::NO_OUTPUT;
 630
 631         return (result & ERROR_MASK) == 0;
 632
 633 }
 634
 635
 636
 637 void Converters::buildGraph()
 638 {
 639         G_.init(formats.size());
 640         ConverterList::iterator beg = converterlist_.begin();
 641         ConverterList::iterator const end = converterlist_.end();
 642         for (ConverterList::iterator it = beg; it != end ; ++it) {
 643                 int const s = formats.getNumber(it->from);
 644                 int const t = formats.getNumber(it->to);
 645                 G_.addEdge(s,t);
 646         }
 647 }
 648
 649
 650 std::vector<Format const *> const
 651 Converters::intToFormat(std::vector<int> const & input)
 652 {
 653         vector<Format const *> result(input.size());
 654
 655         vector<int>::const_iterator it = input.begin();
 656         vector<int>::const_iterator const end = input.end();
 657         vector<Format const *>::iterator rit = result.begin();
 658         for ( ; it != end; ++it, ++rit) {
 659                 *rit = &formats.get(*it);
 660         }
 661         return result;
 662 }
 663
 664
 665 vector<Format const *> const
 666 Converters::getReachableTo(string const & target, bool const clear_visited)
 667 {
 668         vector<int> const & reachablesto =
 669                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 670
 671         return intToFormat(reachablesto);
 672 }
 673
 674
 675 vector<Format const *> const
 676 Converters::getReachable(string const & from, bool const only_viewable,
 677                          bool const clear_visited)
 678 {
 679         vector<int> const & reachables =
 680                 G_.getReachable(formats.getNumber(from),
 681                                 only_viewable,
 682                                 clear_visited);
 683
 684         return intToFormat(reachables);
 685 }
 686
 687
 688 bool Converters::isReachable(string const & from, string const & to)
 689 {
 690         return G_.isReachable(formats.getNumber(from),
 691                               formats.getNumber(to));
 692 }
 693
 694
 695 Graph::EdgePath Converters::getPath(string const & from, string const & to)
 696 {
 697         return G_.getPath(formats.getNumber(from),
 698                           formats.getNumber(to));
 699 }
 700
 701
 702 vector<Format const *> Converters::importableFormats()
 703 {
 704         vector<string> l = loaders();
 705         vector<Format const *> result = getReachableTo(l[0], true);
 706         for (vector<string>::const_iterator it = l.begin() + 1;
 707              it != l.end(); ++it) {
 708                 vector<Format const *> r = getReachableTo(*it, false);
 709                 result.insert(result.end(), r.begin(), r.end());
 710         }
 711         return result;
 712 }
 713
 714
 715 vector<string> Converters::loaders() const
 716 {
 717         vector<string> v;
 718         v.push_back("lyx");
 719         v.push_back("text");
 720         v.push_back("textparagraph");
 721         return v;
 722 }
 723
 724
 725 } // namespace lyx