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 "Buffer.h"
  16 #include "buffer_funcs.h"
  17 #include "BufferParams.h"
  18 #include "ConverterCache.h"
  19 #include "Encoding.h"
  20 #include "ErrorList.h"
  21 #include "Format.h"
  22 #include "Language.h"
  23 #include "LaTeX.h"
  24 #include "Mover.h"
  25
  26 #include "frontends/alert.h"
  27
  28 #include "support/debug.h"
  29 #include "support/FileNameList.h"
  30 #include "support/filetools.h"
  31 #include "support/gettext.h"
  32 #include "support/lstrings.h"
  33 #include "support/os.h"
  34 #include "support/Package.h"
  35 #include "support/Path.h"
  36 #include "support/Systemcall.h"
  37
  38 using namespace std;
  39 using namespace lyx::support;
  40
  41 namespace lyx {
  42
  43 namespace Alert = lyx::frontend::Alert;
  44
  45
  46 namespace {
  47
  48 string const token_from("$$i");
  49 string const token_base("$$b");
  50 string const token_to("$$o");
  51 string const token_path("$$p");
  52 string const token_orig_path("$$r");
  53 string const token_orig_from("$$f");
  54 string const token_encoding("$$e");
  55 string const token_latex_encoding("$$E");
  56
  57
  58 string const add_options(string const & command, string const & options)
  59 {
  60         string head;
  61         string const tail = split(command, head, ' ');
  62         return head + ' ' + options + ' ' + tail;
  63 }
  64
  65
  66 string const dvipdfm_options(BufferParams const & bp)
  67 {
  68         string result;
  69
  70         if (bp.papersize != PAPER_CUSTOM) {
  71                 string const paper_size = bp.paperSizeName(BufferParams::DVIPDFM);
  72                 if (!paper_size.empty())
  73                         result = "-p "+ paper_size;
  74
  75                 if (bp.orientation == ORIENTATION_LANDSCAPE)
  76                         result += " -l";
  77         }
  78
  79         return result;
  80 }
  81
  82
  83 class ConverterEqual {
  84 public:
  85         ConverterEqual(string const & from, string const & to)
  86                 : from_(from), to_(to) {}
  87         bool operator()(Converter const & c) const {
  88                 return c.from == from_ && c.to == to_;
  89         }
  90 private:
  91         string const from_;
  92         string const to_;
  93 };
  94
  95 } // namespace anon
  96
  97
  98 Converter::Converter(string const & f, string const & t,
  99                      string const & c, string const & l)
 100         : from(f), to(t), command(c), flags(l),
 101           From(0), To(0), latex(false), xml(false),
 102           need_aux(false)
 103 {}
 104
 105
 106 void Converter::readFlags()
 107 {
 108         string flag_list(flags);
 109         while (!flag_list.empty()) {
 110                 string flag_name, flag_value;
 111                 flag_list = split(flag_list, flag_value, ',');
 112                 flag_value = split(flag_value, flag_name, '=');
 113                 if (flag_name == "latex") {
 114                         latex = true;
 115                         latex_flavor = flag_value.empty() ?
 116                                 "latex" : flag_value;
 117                 } else if (flag_name == "xml")
 118                         xml = true;
 119                 else if (flag_name == "needaux")
 120                         need_aux = true;
 121                 else if (flag_name == "resultdir")
 122                         result_dir = (flag_value.empty())
 123                                 ? token_base : flag_value;
 124                 else if (flag_name == "resultfile")
 125                         result_file = flag_value;
 126                 else if (flag_name == "parselog")
 127                         parselog = flag_value;
 128         }
 129         if (!result_dir.empty() && result_file.empty())
 130                 result_file = "index." + formats.extension(to);
 131         //if (!contains(command, token_from))
 132         //      latex = true;
 133 }
 134
 135
 136 Converter const * Converters::getConverter(string const & from,
 137                                             string const & to) const
 138 {
 139         ConverterList::const_iterator const cit =
 140                 find_if(converterlist_.begin(), converterlist_.end(),
 141                         ConverterEqual(from, to));
 142         if (cit != converterlist_.end())
 143                 return &(*cit);
 144         else
 145                 return 0;
 146 }
 147
 148
 149 int Converters::getNumber(string const & from, string const & to) const
 150 {
 151         ConverterList::const_iterator const cit =
 152                 find_if(converterlist_.begin(), converterlist_.end(),
 153                         ConverterEqual(from, to));
 154         if (cit != converterlist_.end())
 155                 return distance(converterlist_.begin(), cit);
 156         else
 157                 return -1;
 158 }
 159
 160
 161 void Converters::add(string const & from, string const & to,
 162                      string const & command, string const & flags)
 163 {
 164         formats.add(from);
 165         formats.add(to);
 166         ConverterList::iterator it = find_if(converterlist_.begin(),
 167                                              converterlist_.end(),
 168                                              ConverterEqual(from , to));
 169
 170         Converter converter(from, to, command, flags);
 171         if (it != converterlist_.end() && !flags.empty() && flags[0] == '*') {
 172                 converter = *it;
 173                 converter.command = command;
 174                 converter.flags = flags;
 175         }
 176         converter.readFlags();
 177
 178         // The latex_command is used to update the .aux file when running
 179         // a converter that uses it.
 180         if (converter.latex) {
 181                 if (latex_command_.empty() ||
 182                     converter.latex_flavor == "latex")
 183                         latex_command_ = subst(command, token_from, "");
 184                 if (dvilualatex_command_.empty() ||
 185                     converter.latex_flavor == "dvilualatex")
 186                         dvilualatex_command_ = subst(command, token_from, "");
 187                 if (lualatex_command_.empty() ||
 188                     converter.latex_flavor == "lualatex")
 189                         lualatex_command_ = subst(command, token_from, "");
 190                 if (pdflatex_command_.empty() ||
 191                     converter.latex_flavor == "pdflatex")
 192                         pdflatex_command_ = subst(command, token_from, "");
 193                 if (xelatex_command_.empty() ||
 194                     converter.latex_flavor == "xelatex")
 195                         xelatex_command_ = subst(command, token_from, "");
 196         }
 197
 198         if (it == converterlist_.end()) {
 199                 converterlist_.push_back(converter);
 200         } else {
 201                 converter.From = it->From;
 202                 converter.To = it->To;
 203                 *it = converter;
 204         }
 205 }
 206
 207
 208 void Converters::erase(string const & from, string const & to)
 209 {
 210         ConverterList::iterator const it =
 211                 find_if(converterlist_.begin(),
 212                         converterlist_.end(),
 213                         ConverterEqual(from, to));
 214         if (it != converterlist_.end())
 215                 converterlist_.erase(it);
 216 }
 217
 218
 219 // This method updates the pointers From and To in all the converters.
 220 // The code is not very efficient, but it doesn't matter as the number
 221 // of formats and converters is small.
 222 // Furthermore, this method is called only on startup, or after
 223 // adding/deleting a format in FormPreferences (the latter calls can be
 224 // eliminated if the formats in the Formats class are stored using a map or
 225 // a list (instead of a vector), but this will cause other problems).
 226 void Converters::update(Formats const & formats)
 227 {
 228         ConverterList::iterator it = converterlist_.begin();
 229         ConverterList::iterator end = converterlist_.end();
 230         for (; it != end; ++it) {
 231                 it->From = formats.getFormat(it->from);
 232                 it->To = formats.getFormat(it->to);
 233         }
 234 }
 235
 236
 237 // This method updates the pointers From and To in the last converter.
 238 // It is called when adding a new converter in FormPreferences
 239 void Converters::updateLast(Formats const & formats)
 240 {
 241         if (converterlist_.begin() != converterlist_.end()) {
 242                 ConverterList::iterator it = converterlist_.end() - 1;
 243                 it->From = formats.getFormat(it->from);
 244                 it->To = formats.getFormat(it->to);
 245         }
 246 }
 247
 248
 249 OutputParams::FLAVOR Converters::getFlavor(Graph::EdgePath const & path,
 250                                            Buffer const * buffer)
 251 {
 252         for (Graph::EdgePath::const_iterator cit = path.begin();
 253              cit != path.end(); ++cit) {
 254                 Converter const & conv = converterlist_[*cit];
 255                 if (conv.latex)
 256                         if (conv.latex_flavor == "xelatex")
 257                                 return OutputParams::XETEX;
 258                         if (conv.latex_flavor == "lualatex")
 259                                 return OutputParams::LUATEX;
 260                         if (conv.latex_flavor == "dvilualatex")
 261                                 return OutputParams::DVILUATEX;
 262                         if (conv.latex_flavor == "pdflatex")
 263                                 return OutputParams::PDFLATEX;
 264                 if (conv.xml)
 265                         return OutputParams::XML;
 266         }
 267         return buffer ? buffer->params().getOutputFlavor()
 268                       : OutputParams::LATEX;
 269 }
 270
 271
 272 bool Converters::convert(Buffer const * buffer,
 273                          FileName const & from_file, FileName const & to_file,
 274                          FileName const & orig_from,
 275                          string const & from_format, string const & to_format,
 276                          ErrorList & errorList, int conversionflags)
 277 {
 278         if (from_format == to_format)
 279                 return move(from_format, from_file, to_file, false);
 280
 281         if ((conversionflags & try_cache) &&
 282             ConverterCache::get().inCache(orig_from, to_format))
 283                 return ConverterCache::get().copy(orig_from, to_format, to_file);
 284
 285         Graph::EdgePath edgepath = getPath(from_format, to_format);
 286         if (edgepath.empty()) {
 287                 if (conversionflags & try_default) {
 288                         // if no special converter defined, then we take the
 289                         // default one from ImageMagic.
 290                         string const from_ext = from_format.empty() ?
 291                                 getExtension(from_file.absFileName()) :
 292                                 formats.extension(from_format);
 293                         string const to_ext = formats.extension(to_format);
 294                         string const command =
 295                                 os::python() + ' ' +
 296                                 quoteName(libFileSearch("scripts", "convertDefault.py").toFilesystemEncoding()) +
 297                                 ' ' +
 298                                 quoteName(from_ext + ':' + from_file.toFilesystemEncoding()) +
 299                                 ' ' +
 300                                 quoteName(to_ext + ':' + to_file.toFilesystemEncoding());
 301                         LYXERR(Debug::FILES, "No converter defined! "
 302                                    "I use convertDefault.py:\n\t" << command);
 303                         Systemcall one;
 304                         one.startscript(Systemcall::Wait, command, buffer ?
 305                                         buffer->filePath() : string());
 306                         if (to_file.isReadableFile()) {
 307                                 if (conversionflags & try_cache)
 308                                         ConverterCache::get().add(orig_from,
 309                                                         to_format, to_file);
 310                                 return true;
 311                         }
 312                 }
 313
 314                 // only warn once per session and per file type
 315                 static std::map<string, string> warned;
 316                 if (warned.find(from_format) != warned.end() && warned.find(from_format)->second == to_format) {
 317                         return false;
 318                 }
 319                 warned.insert(make_pair(from_format, to_format));
 320
 321                 Alert::error(_("Cannot convert file"),
 322                              bformat(_("No information for converting %1$s "
 323                                                     "format files to %2$s.\n"
 324                                                     "Define a converter in the preferences."),
 325                                                         from_ascii(from_format), from_ascii(to_format)));
 326                 return false;
 327         }
 328
 329         // buffer is only invalid for importing, and then runparams is not
 330         // used anyway.
 331         OutputParams runparams(buffer ? &buffer->params().encoding() : 0);
 332         runparams.flavor = getFlavor(edgepath, buffer);
 333
 334         if (buffer) {
 335                 runparams.use_japanese = buffer->params().bufferFormat() == "platex";
 336                 runparams.use_indices = buffer->params().use_indices;
 337                 runparams.bibtex_command = (buffer->params().bibtex_command == "default") ?
 338                         string() : buffer->params().bibtex_command;
 339                 runparams.index_command = (buffer->params().index_command == "default") ?
 340                         string() : buffer->params().index_command;
 341         }
 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         // FIXME: This does not work if path is an UNC path on windows
 349         //        (bug 6127).
 350         string const path(onlyPath(from_file.absFileName()));
 351         // Prevent the compiler from optimizing away p
 352         FileName pp(path);
 353         PathChanger p(pp);
 354
 355         // empty the error list before any new conversion takes place.
 356         errorList.clear();
 357
 358         bool run_latex = false;
 359         string from_base = changeExtension(from_file.absFileName(), "");
 360         string to_base = changeExtension(to_file.absFileName(), "");
 361         FileName infile;
 362         FileName outfile = from_file;
 363         for (Graph::EdgePath::const_iterator cit = edgepath.begin();
 364              cit != edgepath.end(); ++cit) {
 365                 Converter const & conv = converterlist_[*cit];
 366                 bool dummy = conv.To->dummy() && conv.to != "program";
 367                 if (!dummy) {
 368                         LYXERR(Debug::FILES, "Converting from  "
 369                                << conv.from << " to " << conv.to);
 370                 }
 371                 infile = outfile;
 372                 outfile = FileName(conv.result_file.empty()
 373                         ? changeExtension(from_file.absFileName(), conv.To->extension())
 374                         : addName(subst(conv.result_dir,
 375                                         token_base, from_base),
 376                                   subst(conv.result_file,
 377                                         token_base, onlyFileName(from_base))));
 378
 379                 // if input and output files are equal, we use a
 380                 // temporary file as intermediary (JMarc)
 381                 FileName real_outfile;
 382                 if (!conv.result_file.empty())
 383                         real_outfile = FileName(changeExtension(from_file.absFileName(),
 384                                 conv.To->extension()));
 385                 if (outfile == infile) {
 386                         real_outfile = infile;
 387                         // when importing, a buffer does not necessarily exist
 388                         if (buffer)
 389                                 outfile = FileName(addName(buffer->temppath(), "tmpfile.out"));
 390                         else
 391                                 outfile = FileName(addName(package().temp_dir().absFileName(),
 392                                                    "tmpfile.out"));
 393                 }
 394
 395                 if (conv.latex) {
 396                         run_latex = true;
 397                         string command = conv.command;
 398                         command = subst(command, token_from, "");
 399                         command = subst(command, token_latex_encoding, buffer ?
 400                                 buffer->params().encoding().latexName() : string());
 401                         LYXERR(Debug::FILES, "Running " << command);
 402                         if (!runLaTeX(*buffer, command, runparams, errorList))
 403                                 return false;
 404                 } else {
 405                         if (conv.need_aux && !run_latex) {
 406                                 string command;
 407                                 switch (runparams.flavor) {
 408                                 case OutputParams::DVILUATEX:
 409                                         command = dvilualatex_command_;
 410                                         break;
 411                                 case OutputParams::LUATEX:
 412                                         command = lualatex_command_;
 413                                         break;
 414                                 case OutputParams::PDFLATEX:
 415                                         command = pdflatex_command_;
 416                                         break;
 417                                 case OutputParams::XETEX:
 418                                         command = xelatex_command_;
 419                                         break;
 420                                 default:
 421                                         command = latex_command_;
 422                                         break;
 423                                 }
 424                                 if (!command.empty()) {
 425                                         LYXERR(Debug::FILES, "Running "
 426                                                 << command
 427                                                 << " to update aux file");
 428                                         if (!runLaTeX(*buffer, command,
 429                                                       runparams, errorList))
 430                                                 return false;
 431                                 }
 432                         }
 433
 434                         // FIXME UNICODE
 435                         string const infile2 =
 436                                 to_utf8(makeRelPath(from_utf8(infile.absFileName()), from_utf8(path)));
 437                         string const outfile2 =
 438                                 to_utf8(makeRelPath(from_utf8(outfile.absFileName()), from_utf8(path)));
 439
 440                         string command = conv.command;
 441                         command = subst(command, token_from, quoteName(infile2));
 442                         command = subst(command, token_base, quoteName(from_base));
 443                         command = subst(command, token_to, quoteName(outfile2));
 444                         command = subst(command, token_path, quoteName(onlyPath(infile.absFileName())));
 445                         command = subst(command, token_orig_path, quoteName(onlyPath(orig_from.absFileName())));
 446                         command = subst(command, token_orig_from, quoteName(onlyFileName(orig_from.absFileName())));
 447                         command = subst(command, token_encoding, buffer ? buffer->params().encoding().iconvName() : string());
 448                         command = libScriptSearch(command);
 449
 450                         if (!conv.parselog.empty())
 451                                 command += " 2> " + quoteName(infile2 + ".out");
 452
 453                         if (conv.from == "dvi" && conv.to == "ps")
 454                                 command = add_options(command,
 455                                                       buffer->params().dvips_options());
 456                         else if (conv.from == "dvi" && prefixIs(conv.to, "pdf"))
 457                                 command = add_options(command,
 458                                                       dvipdfm_options(buffer->params()));
 459
 460                         LYXERR(Debug::FILES, "Calling " << command);
 461                         if (buffer)
 462                                 buffer->message(_("Executing command: ")
 463                                 + from_utf8(command));
 464
 465                         Systemcall one;
 466                         int res;
 467                         if (dummy) {
 468                                 res = one.startscript(Systemcall::DontWait,
 469                                         to_filesystem8bit(from_utf8(command)),
 470                                         buffer ? buffer->filePath() : string());
 471                                 // We're not waiting for the result, so we can't do anything
 472                                 // else here.
 473                         } else {
 474                                 res = one.startscript(Systemcall::Wait,
 475                                                 to_filesystem8bit(from_utf8(command)),
 476                                                 buffer ? buffer->filePath()
 477                                                        : string());
 478                                 if (!real_outfile.empty()) {
 479                                         Mover const & mover = getMover(conv.to);
 480                                         if (!mover.rename(outfile, real_outfile))
 481                                                 res = -1;
 482                                         else
 483                                                 LYXERR(Debug::FILES, "renaming file " << outfile
 484                                                         << " to " << real_outfile);
 485                                         // Finally, don't forget to tell any future
 486                                         // converters to use the renamed file...
 487                                         outfile = real_outfile;
 488                                 }
 489
 490                                 if (!conv.parselog.empty()) {
 491                                         string const logfile =  infile2 + ".log";
 492                                         string const script = libScriptSearch(conv.parselog);
 493                                         string const command2 = script +
 494                                                 " < " + quoteName(infile2 + ".out") +
 495                                                 " > " + quoteName(logfile);
 496                                         one.startscript(Systemcall::Wait,
 497                                                 to_filesystem8bit(from_utf8(command2)),
 498                                                 buffer->filePath());
 499                                         if (!scanLog(*buffer, command, makeAbsPath(logfile, path), errorList))
 500                                                 return false;
 501                                 }
 502                         }
 503
 504                         if (res) {
 505                                 if (conv.to == "program") {
 506                                         Alert::error(_("Build errors"),
 507                                                 _("There were errors during the build process."));
 508                                 } else {
 509 // FIXME: this should go out of here. For example, here we cannot say if
 510 // it is a document (.lyx) or something else. Same goes for elsewhere.
 511                                         Alert::error(_("Cannot convert file"),
 512                                                 bformat(_("An error occurred while running:\n%1$s"),
 513                                                 wrapParas(from_utf8(command))));
 514                                 }
 515                                 return false;
 516                         }
 517                 }
 518         }
 519
 520         Converter const & conv = converterlist_[edgepath.back()];
 521         if (conv.To->dummy())
 522                 return true;
 523
 524         if (!conv.result_dir.empty()) {
 525                 // The converter has put the file(s) in a directory.
 526                 // In this case we ignore the given to_file.
 527                 if (from_base != to_base) {
 528                         string const from = subst(conv.result_dir,
 529                                             token_base, from_base);
 530                         string const to = subst(conv.result_dir,
 531                                           token_base, to_base);
 532                         Mover const & mover = getMover(conv.from);
 533                         if (!mover.rename(FileName(from), FileName(to))) {
 534                                 Alert::error(_("Cannot convert file"),
 535                                         bformat(_("Could not move a temporary directory from %1$s to %2$s."),
 536                                                 from_utf8(from), from_utf8(to)));
 537                                 return false;
 538                         }
 539                 }
 540                 return true;
 541         } else {
 542                 if (conversionflags & try_cache)
 543                         ConverterCache::get().add(orig_from, to_format, outfile);
 544                 return move(conv.to, outfile, to_file, conv.latex);
 545         }
 546 }
 547
 548
 549 bool Converters::move(string const & fmt,
 550                       FileName const & from, FileName const & to, bool copy)
 551 {
 552         if (from == to)
 553                 return true;
 554
 555         bool no_errors = true;
 556         string const path = onlyPath(from.absFileName());
 557         string const base = onlyFileName(removeExtension(from.absFileName()));
 558         string const to_base = removeExtension(to.absFileName());
 559         string const to_extension = getExtension(to.absFileName());
 560
 561         support::FileNameList const files = FileName(path).dirList(getExtension(from.absFileName()));
 562         for (support::FileNameList::const_iterator it = files.begin();
 563              it != files.end(); ++it) {
 564                 string const from2 = it->absFileName();
 565                 string const file2 = onlyFileName(from2);
 566                 if (prefixIs(file2, base)) {
 567                         string const to2 = changeExtension(
 568                                 to_base + file2.substr(base.length()),
 569                                 to_extension);
 570                         LYXERR(Debug::FILES, "moving " << from2 << " to " << to2);
 571
 572                         Mover const & mover = getMover(fmt);
 573                         bool const moved = copy
 574                                 ? mover.copy(*it, FileName(to2))
 575                                 : mover.rename(*it, FileName(to2));
 576                         if (!moved && no_errors) {
 577                                 Alert::error(_("Cannot convert file"),
 578                                         bformat(copy ?
 579                                                 _("Could not copy a temporary file from %1$s to %2$s.") :
 580                                                 _("Could not move a temporary file from %1$s to %2$s."),
 581                                                 from_utf8(from2), from_utf8(to2)));
 582                                 no_errors = false;
 583                         }
 584                 }
 585         }
 586         return no_errors;
 587 }
 588
 589
 590 bool Converters::formatIsUsed(string const & format)
 591 {
 592         ConverterList::const_iterator cit = converterlist_.begin();
 593         ConverterList::const_iterator end = converterlist_.end();
 594         for (; cit != end; ++cit) {
 595                 if (cit->from == format || cit->to == format)
 596                         return true;
 597         }
 598         return false;
 599 }
 600
 601
 602 bool Converters::scanLog(Buffer const & buffer, string const & /*command*/,
 603                          FileName const & filename, ErrorList & errorList)
 604 {
 605         OutputParams runparams(0);
 606         runparams.flavor = OutputParams::LATEX;
 607         LaTeX latex("", runparams, filename);
 608         TeXErrors terr;
 609         int const result = latex.scanLogFile(terr);
 610
 611         if (result & LaTeX::ERRORS)
 612                 buffer.bufferErrors(terr, errorList);
 613
 614         return true;
 615 }
 616
 617
 618 namespace {
 619
 620 class ShowMessage
 621         : public boost::signals::trackable {
 622 public:
 623         ShowMessage(Buffer const & b) : buffer_(b) {}
 624         void operator()(docstring const & msg) const { buffer_.message(msg); }
 625 private:
 626         Buffer const & buffer_;
 627 };
 628
 629 }
 630
 631
 632 bool Converters::runLaTeX(Buffer const & buffer, string const & command,
 633                           OutputParams const & runparams, ErrorList & errorList)
 634 {
 635         buffer.setBusy(true);
 636         buffer.message(_("Running LaTeX..."));
 637
 638         runparams.document_language = buffer.params().language->babel();
 639
 640         // do the LaTeX run(s)
 641         string const name = buffer.latexName();
 642         LaTeX latex(command, runparams, FileName(makeAbsPath(name)),
 643                     buffer.filePath());
 644         TeXErrors terr;
 645         ShowMessage show(buffer);
 646         latex.message.connect(show);
 647         int const result = latex.run(terr);
 648
 649         if (result & LaTeX::ERRORS)
 650                 buffer.bufferErrors(terr, errorList);
 651
 652         // check return value from latex.run().
 653         if ((result & LaTeX::NO_LOGFILE) && !buffer.isClone()) {
 654                 docstring const str =
 655                         bformat(_("LaTeX did not run successfully. "
 656                                                "Additionally, LyX could not locate "
 657                                                "the LaTeX log %1$s."), from_utf8(name));
 658                 Alert::error(_("LaTeX failed"), str);
 659         } else if ((result & LaTeX::NO_OUTPUT) && !buffer.isClone()) {
 660                 Alert::warning(_("Output is empty"),
 661                                _("An empty output file was generated."));
 662         }
 663
 664
 665         buffer.setBusy(false);
 666
 667         int const ERROR_MASK =
 668                         LaTeX::NO_LOGFILE |
 669                         LaTeX::ERRORS |
 670                         LaTeX::NO_OUTPUT;
 671
 672         return (result & ERROR_MASK) == 0;
 673
 674 }
 675
 676
 677
 678 void Converters::buildGraph()
 679 {
 680         // clear graph's data structures
 681         G_.init(formats.size());
 682         // each of the converters knows how to convert one format to another
 683         // so, for each of them, we create an arrow on the graph, going from
 684         // the one to the other
 685         ConverterList::iterator it = converterlist_.begin();
 686         ConverterList::iterator const end = converterlist_.end();
 687         for (; it != end ; ++it) {
 688                 int const from = formats.getNumber(it->from);
 689                 int const to   = formats.getNumber(it->to);
 690                 G_.addEdge(from, to);
 691         }
 692 }
 693
 694
 695 vector<Format const *> const
 696 Converters::intToFormat(vector<int> const & input)
 697 {
 698         vector<Format const *> result(input.size());
 699
 700         vector<int>::const_iterator it = input.begin();
 701         vector<int>::const_iterator const end = input.end();
 702         vector<Format const *>::iterator rit = result.begin();
 703         for ( ; it != end; ++it, ++rit) {
 704                 *rit = &formats.get(*it);
 705         }
 706         return result;
 707 }
 708
 709
 710 vector<Format const *> const
 711 Converters::getReachableTo(string const & target, bool const clear_visited)
 712 {
 713         vector<int> const & reachablesto =
 714                 G_.getReachableTo(formats.getNumber(target), clear_visited);
 715
 716         return intToFormat(reachablesto);
 717 }
 718
 719
 720 vector<Format const *> const
 721 Converters::getReachable(string const & from, bool const only_viewable,
 722                          bool const clear_visited, set<string> const & excludes)
 723 {
 724         set<int> excluded_numbers;;
 725
 726         set<string>::const_iterator sit = excludes.begin();
 727         set<string>::const_iterator const end = excludes.end();
 728         for (; sit != end; ++sit)
 729                 excluded_numbers.insert(formats.getNumber(*sit));
 730
 731         vector<int> const & reachables =
 732                 G_.getReachable(formats.getNumber(from),
 733                                 only_viewable,
 734                                 clear_visited,
 735                                 excluded_numbers);
 736
 737         return intToFormat(reachables);
 738 }
 739
 740
 741 bool Converters::isReachable(string const & from, string const & to)
 742 {
 743         return G_.isReachable(formats.getNumber(from),
 744                               formats.getNumber(to));
 745 }
 746
 747
 748 Graph::EdgePath Converters::getPath(string const & from, string const & to)
 749 {
 750         return G_.getPath(formats.getNumber(from),
 751                           formats.getNumber(to));
 752 }
 753
 754
 755 vector<Format const *> Converters::importableFormats()
 756 {
 757         vector<string> l = loaders();
 758         vector<Format const *> result = getReachableTo(l[0], true);
 759         vector<string>::const_iterator it = l.begin() + 1;
 760         vector<string>::const_iterator en = l.end();
 761         for (; it != en; ++it) {
 762                 vector<Format const *> r = getReachableTo(*it, false);
 763                 result.insert(result.end(), r.begin(), r.end());
 764         }
 765         return result;
 766 }
 767
 768
 769 vector<Format const *> Converters::exportableFormats(bool only_viewable)
 770 {
 771         vector<string> s = savers();
 772         vector<Format const *> result = getReachable(s[0], only_viewable, true);
 773         vector<string>::const_iterator it = s.begin() + 1;
 774         vector<string>::const_iterator en = s.end();
 775         for (; it != en; ++it) {
 776                 vector<Format const *> r =
 777                         getReachable(*it, only_viewable, false);
 778                 result.insert(result.end(), r.begin(), r.end());
 779         }
 780         return result;
 781 }
 782
 783
 784 vector<string> Converters::loaders() const
 785 {
 786         vector<string> v;
 787         v.push_back("lyx");
 788         v.push_back("text");
 789         v.push_back("textparagraph");
 790         return v;
 791 }
 792
 793
 794 vector<string> Converters::savers() const
 795 {
 796         vector<string> v;
 797         v.push_back("docbook");
 798         v.push_back("latex");
 799         v.push_back("literate");
 800         v.push_back("luatex");
 801         v.push_back("dviluatex");
 802         v.push_back("lyx");
 803         v.push_back("xhtml");
 804         v.push_back("pdflatex");
 805         v.push_back("platex");
 806         v.push_back("text");
 807         v.push_back("xetex");
 808         return v;
 809 }
 810
 811
 812 } // namespace lyx