src/insets/InsetBibtex.cpp

   1 /**
   2  * \file InsetBibtex.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alejandro Aguilar Sierra
   7  * \author Richard Heck (BibTeX parser improvements)
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "InsetBibtex.h"
  15
  16 #include "Buffer.h"
  17 #include "BufferParams.h"
  18 #include "DispatchResult.h"
  19 #include "debug.h"
  20 #include "Encoding.h"
  21 #include "FuncRequest.h"
  22 #include "gettext.h"
  23 #include "LaTeXFeatures.h"
  24 #include "MetricsInfo.h"
  25 #include "OutputParams.h"
  26 #include "TextClass.h"
  27
  28 #include "frontends/alert.h"
  29
  30 #include "support/ExceptionMessage.h"
  31 #include "support/docstream.h"
  32 #include "support/filetools.h"
  33 #include "support/lstrings.h"
  34 #include "support/lyxlib.h"
  35 #include "support/os.h"
  36 #include "support/Path.h"
  37 #include "support/textutils.h"
  38
  39 #include <boost/tokenizer.hpp>
  40
  41
  42 namespace lyx {
  43
  44 using support::absolutePath;
  45 using support::ascii_lowercase;
  46 using support::changeExtension;
  47 using support::contains;
  48 using support::copy;
  49 using support::DocFileName;
  50 using support::FileName;
  51 using support::findtexfile;
  52 using support::isValidLaTeXFilename;
  53 using support::latex_path;
  54 using support::ltrim;
  55 using support::makeAbsPath;
  56 using support::makeRelPath;
  57 using support::prefixIs;
  58 using support::removeExtension;
  59 using support::rtrim;
  60 using support::split;
  61 using support::subst;
  62 using support::tokenPos;
  63 using support::trim;
  64 using support::lowercase;
  65
  66 namespace Alert = frontend::Alert;
  67 namespace os = support::os;
  68
  69 using std::endl;
  70 using std::getline;
  71 using std::string;
  72 using std::ostream;
  73 using std::pair;
  74 using std::vector;
  75 using std::map;
  76
  77
  78 InsetBibtex::InsetBibtex(InsetCommandParams const & p)
  79         : InsetCommand(p, "bibtex")
  80 {}
  81
  82
  83 CommandInfo const * InsetBibtex::findInfo(std::string const & /* cmdName */)
  84 {
  85         static const char * const paramnames[] =
  86                 {"options", "btprint", "bibfiles", ""};
  87         static const bool isoptional[] = {true, true, false};
  88         static const CommandInfo info = {3, paramnames, isoptional};
  89         return &info;
  90 }
  91
  92
  93 Inset * InsetBibtex::clone() const
  94 {
  95         return new InsetBibtex(*this);
  96 }
  97
  98
  99 void InsetBibtex::doDispatch(Cursor & cur, FuncRequest & cmd)
 100 {
 101         switch (cmd.action) {
 102
 103         case LFUN_INSET_MODIFY: {
 104                 InsetCommandParams p(BIBTEX_CODE);
 105                 try {
 106                         if (!InsetCommandMailer::string2params("bibtex",
 107                                         to_utf8(cmd.argument()), p)) {
 108                                 cur.noUpdate();
 109                                 break;
 110                         }
 111                 } catch (support::ExceptionMessage const & message) {
 112                         if (message.type_ == support::WarningException) {
 113                                 Alert::warning(message.title_, message.details_);
 114                                 cur.noUpdate();
 115                         } else
 116                                 throw message;
 117                         break;
 118                 }
 119                 setParams(p);
 120                 cur.buffer().updateBibfilesCache();
 121                 break;
 122         }
 123
 124         default:
 125                 InsetCommand::doDispatch(cur, cmd);
 126                 break;
 127         }
 128 }
 129
 130
 131 docstring const InsetBibtex::getScreenLabel(Buffer const &) const
 132 {
 133         return _("BibTeX Generated Bibliography");
 134 }
 135
 136
 137 namespace {
 138
 139 string normalizeName(Buffer const & buffer, OutputParams const & runparams,
 140                       string const & name, string const & ext)
 141 {
 142         string const fname = makeAbsPath(name, buffer.filePath()).absFilename();
 143         if (absolutePath(name) || !FileName(fname + ext).isFileReadable())
 144                 return name;
 145         if (!runparams.nice)
 146                 return fname;
 147
 148         // FIXME UNICODE
 149         return to_utf8(makeRelPath(from_utf8(fname),
 150                                          from_utf8(buffer.masterBuffer()->filePath())));
 151 }
 152
 153 }
 154
 155
 156 int InsetBibtex::latex(Buffer const & buffer, odocstream & os,
 157                        OutputParams const & runparams) const
 158 {
 159         // the sequence of the commands:
 160         // 1. \bibliographystyle{style}
 161         // 2. \addcontentsline{...} - if option bibtotoc set
 162         // 3. \bibliography{database}
 163         // and with bibtopic:
 164         // 1. \bibliographystyle{style}
 165         // 2. \begin{btSect}{database}
 166         // 3. \btPrint{Cited|NotCited|All}
 167         // 4. \end{btSect}
 168
 169         // Database(s)
 170         // If we are processing the LaTeX file in a temp directory then
 171         // copy the .bib databases to this temp directory, mangling their
 172         // names in the process. Store this mangled name in the list of
 173         // all databases.
 174         // (We need to do all this because BibTeX *really*, *really*
 175         // can't handle "files with spaces" and Windows users tend to
 176         // use such filenames.)
 177         // Otherwise, store the (maybe absolute) path to the original,
 178         // unmangled database name.
 179         typedef boost::char_separator<char_type> Separator;
 180         typedef boost::tokenizer<Separator, docstring::const_iterator, docstring> Tokenizer;
 181
 182         Separator const separator(from_ascii(",").c_str());
 183         // The tokenizer must not be called with temporary strings, since
 184         // it does not make a copy and uses iterators of the string further
 185         // down. getParam returns a reference, so this is OK.
 186         Tokenizer const tokens(getParam("bibfiles"), separator);
 187         Tokenizer::const_iterator const begin = tokens.begin();
 188         Tokenizer::const_iterator const end = tokens.end();
 189
 190         odocstringstream dbs;
 191         for (Tokenizer::const_iterator it = begin; it != end; ++it) {
 192                 docstring const input = trim(*it);
 193                 // FIXME UNICODE
 194                 string utf8input = to_utf8(input);
 195                 string database =
 196                         normalizeName(buffer, runparams, utf8input, ".bib");
 197                 FileName const try_in_file(makeAbsPath(database + ".bib", buffer.filePath()));
 198                 bool const not_from_texmf = try_in_file.isFileReadable();
 199
 200                 if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
 201                     not_from_texmf) {
 202
 203                         // mangledFilename() needs the extension
 204                         DocFileName const in_file = DocFileName(try_in_file);
 205                         database = removeExtension(in_file.mangledFilename());
 206                         FileName const out_file = makeAbsPath(database + ".bib",
 207                                         buffer.masterBuffer()->temppath());
 208
 209                         bool const success = copy(in_file, out_file);
 210                         if (!success) {
 211                                 lyxerr << "Failed to copy '" << in_file
 212                                        << "' to '" << out_file << "'"
 213                                        << endl;
 214                         }
 215                 } else if (!runparams.inComment && runparams.nice && not_from_texmf &&
 216                            !isValidLaTeXFilename(database)) {
 217                                 frontend::Alert::warning(_("Invalid filename"),
 218                                                          _("The following filename is likely to cause trouble "
 219                                                            "when running the exported file through LaTeX: ") +
 220                                                             from_utf8(database));
 221                 }
 222
 223                 if (it != begin)
 224                         dbs << ',';
 225                 // FIXME UNICODE
 226                 dbs << from_utf8(latex_path(database));
 227         }
 228         docstring const db_out = dbs.str();
 229
 230         // Post this warning only once.
 231         static bool warned_about_spaces = false;
 232         if (!warned_about_spaces &&
 233             runparams.nice && db_out.find(' ') != docstring::npos) {
 234                 warned_about_spaces = true;
 235
 236                 Alert::warning(_("Export Warning!"),
 237                                _("There are spaces in the paths to your BibTeX databases.\n"
 238                                               "BibTeX will be unable to find them."));
 239         }
 240
 241         // Style-Options
 242         string style = to_utf8(getParam("options")); // maybe empty! and with bibtotoc
 243         string bibtotoc;
 244         if (prefixIs(style, "bibtotoc")) {
 245                 bibtotoc = "bibtotoc";
 246                 if (contains(style, ','))
 247                         style = split(style, bibtotoc, ',');
 248         }
 249
 250         // line count
 251         int nlines = 0;
 252
 253         if (!style.empty()) {
 254                 string base = normalizeName(buffer, runparams, style, ".bst");
 255                 FileName const try_in_file(makeAbsPath(base + ".bst", buffer.filePath()));
 256                 bool const not_from_texmf = try_in_file.isFileReadable();
 257                 // If this style does not come from texmf and we are not
 258                 // exporting to .tex copy it to the tmp directory.
 259                 // This prevents problems with spaces and 8bit charcaters
 260                 // in the file name.
 261                 if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
 262                     not_from_texmf) {
 263                         // use new style name
 264                         DocFileName const in_file = DocFileName(try_in_file);
 265                         base = removeExtension(in_file.mangledFilename());
 266                         FileName const out_file(makeAbsPath(base + ".bst",
 267                                         buffer.masterBuffer()->temppath()));
 268                         bool const success = copy(in_file, out_file);
 269                         if (!success) {
 270                                 lyxerr << "Failed to copy '" << in_file
 271                                        << "' to '" << out_file << "'"
 272                                        << endl;
 273                         }
 274                 }
 275                 // FIXME UNICODE
 276                 os << "\\bibliographystyle{"
 277                    << from_utf8(latex_path(normalizeName(buffer, runparams, base, ".bst")))
 278                    << "}\n";
 279                 nlines += 1;
 280         }
 281
 282         // Post this warning only once.
 283         static bool warned_about_bst_spaces = false;
 284         if (!warned_about_bst_spaces && runparams.nice && contains(style, ' ')) {
 285                 warned_about_bst_spaces = true;
 286                 Alert::warning(_("Export Warning!"),
 287                                _("There are spaces in the path to your BibTeX style file.\n"
 288                                               "BibTeX will be unable to find it."));
 289         }
 290
 291         if (!db_out.empty() && buffer.params().use_bibtopic){
 292                 os << "\\begin{btSect}{" << db_out << "}\n";
 293                 docstring btprint = getParam("btprint");
 294                 if (btprint.empty())
 295                         // default
 296                         btprint = from_ascii("btPrintCited");
 297                 os << "\\" << btprint << "\n"
 298                    << "\\end{btSect}\n";
 299                 nlines += 3;
 300         }
 301
 302         // bibtotoc-Option
 303         if (!bibtotoc.empty() && !buffer.params().use_bibtopic) {
 304                 // maybe a problem when a textclass has no "art" as
 305                 // part of its name, because it's than book.
 306                 // For the "official" lyx-layouts it's no problem to support
 307                 // all well
 308                 if (!contains(buffer.params().getTextClass().name(),
 309                               "art")) {
 310                         if (buffer.params().sides == OneSide) {
 311                                 // oneside
 312                                 os << "\\clearpage";
 313                         } else {
 314                                 // twoside
 315                                 os << "\\cleardoublepage";
 316                         }
 317
 318                         // bookclass
 319                         os << "\\addcontentsline{toc}{chapter}{\\bibname}";
 320
 321                 } else {
 322                         // article class
 323                         os << "\\addcontentsline{toc}{section}{\\refname}";
 324                 }
 325         }
 326
 327         if (!db_out.empty() && !buffer.params().use_bibtopic){
 328                 os << "\\bibliography{" << db_out << "}\n";
 329                 nlines += 1;
 330         }
 331
 332         return nlines;
 333 }
 334
 335
 336 vector<FileName> const InsetBibtex::getFiles(Buffer const & buffer) const
 337 {
 338         FileName path(buffer.filePath());
 339         support::PathChanger p(path);
 340
 341         vector<FileName> vec;
 342
 343         string tmp;
 344         // FIXME UNICODE
 345         string bibfiles = to_utf8(getParam("bibfiles"));
 346         bibfiles = split(bibfiles, tmp, ',');
 347         while (!tmp.empty()) {
 348                 FileName const file = findtexfile(changeExtension(tmp, "bib"), "bib");
 349                 LYXERR(Debug::LATEX) << "Bibfile: " << file << endl;
 350
 351                 // If we didn't find a matching file name just fail silently
 352                 if (!file.empty())
 353                         vec.push_back(file);
 354
 355                 // Get next file name
 356                 bibfiles = split(bibfiles, tmp, ',');
 357         }
 358
 359         return vec;
 360 }
 361
 362 namespace {
 363
 364         // methods for parsing bibtex files
 365
 366         typedef map<docstring, docstring> VarMap;
 367
 368         /// remove whitespace characters, optionally a single comma,
 369         /// and further whitespace characters from the stream.
 370         /// @return true if a comma was found, false otherwise
 371         ///
 372         bool removeWSAndComma(idocfstream & ifs) {
 373                 char_type ch;
 374
 375                 if (!ifs)
 376                         return false;
 377
 378                 // skip whitespace
 379                 do {
 380                         ifs.get(ch);
 381                 } while (ifs && isSpace(ch));
 382
 383                 if (!ifs)
 384                         return false;
 385
 386                 if (ch != ',') {
 387                         ifs.putback(ch);
 388                         return false;
 389                 }
 390
 391                 // skip whitespace
 392                 do {
 393                         ifs.get(ch);
 394                 } while (ifs && isSpace(ch));
 395
 396                 if (ifs) {
 397                         ifs.putback(ch);
 398                 }
 399
 400                 return true;
 401         }
 402
 403
 404         enum charCase {
 405                 makeLowerCase,
 406                 keepCase
 407         };
 408
 409         /// remove whitespace characters, read characer sequence
 410         /// not containing whitespace characters or characters in
 411         /// delimChars, and remove further whitespace characters.
 412         ///
 413         /// @return true if a string of length > 0 could be read.
 414         ///
 415         bool readTypeOrKey(docstring & val, idocfstream & ifs,
 416                 docstring const & delimChars, docstring const &illegalChars,
 417                 charCase chCase) {
 418
 419                 char_type ch;
 420
 421                 val.clear();
 422
 423                 if (!ifs)
 424                         return false;
 425
 426                 // skip whitespace
 427                 do {
 428                         ifs.get(ch);
 429                 } while (ifs && isSpace(ch));
 430
 431                 if (!ifs)
 432                         return false;
 433
 434                 // read value
 435                 bool legalChar = true;
 436                 while (ifs && !isSpace(ch) &&
 437                                                  delimChars.find(ch) == docstring::npos &&
 438                                                  (legalChar = (illegalChars.find(ch) == docstring::npos))
 439                                         )
 440                 {
 441                         if (chCase == makeLowerCase)
 442                                 val += lowercase(ch);
 443                         else
 444                                 val += ch;
 445                         ifs.get(ch);
 446                 }
 447
 448                 if (!legalChar) {
 449                         ifs.putback(ch);
 450                         return false;
 451                 }
 452
 453                 // skip whitespace
 454                 while (ifs && isSpace(ch)) {
 455                         ifs.get(ch);
 456                 }
 457
 458                 if (ifs) {
 459                         ifs.putback(ch);
 460                 }
 461
 462                 return val.length() > 0;
 463         }
 464
 465         /// read subsequent bibtex values that are delimited with a #-character.
 466         /// Concatenate all parts and replace names with the associated string in
 467         /// the variable strings.
 468         /// @return true if reading was successfull (all single parts were delimited
 469         /// correctly)
 470         bool readValue(docstring & val, idocfstream & ifs, const VarMap & strings) {
 471
 472                 char_type ch;
 473
 474                 val.clear();
 475
 476                 if (!ifs)
 477                         return false;
 478
 479                 do {
 480                         // skip whitespace
 481                         do {
 482                                 ifs.get(ch);
 483                         } while (ifs && isSpace(ch));
 484
 485                         if (!ifs)
 486                                 return false;
 487
 488                         // check for field type
 489                         if (isDigit(ch)) {
 490
 491                                 // read integer value
 492                                 do {
 493                                         val += ch;
 494                                         ifs.get(ch);
 495                                 } while (ifs && isDigit(ch));
 496
 497                                 if (!ifs)
 498                                         return false;
 499
 500                         } else if (ch == '"' || ch == '{') {
 501                                 // set end delimiter
 502                                 char_type delim = ch == '"' ? '"': '}';
 503
 504                                 //Skip whitespace
 505                                 do {
 506                                         ifs.get(ch);
 507                                 } while (ifs && isSpace(ch));
 508
 509                                 if (!ifs)
 510                                         return false;
 511
 512                                 //We now have the first non-whitespace character
 513                                 //We'll collapse adjacent whitespace.
 514                                 bool lastWasWhiteSpace = false;
 515
 516                                 // inside this delimited text braces must match.
 517                                 // Thus we can have a closing delimiter only
 518                                 // when nestLevel == 0
 519                                 int nestLevel = 0;
 520
 521                                 while (ifs && (nestLevel > 0 || ch != delim)) {
 522                                         if (isSpace(ch)) {
 523                                                 lastWasWhiteSpace = true;
 524                                                 ifs.get(ch);
 525                                                 continue;
 526                                         }
 527                                         //We output the space only after we stop getting
 528                                         //whitespace so as not to output any whitespace
 529                                         //at the end of the value.
 530                                         if (lastWasWhiteSpace) {
 531                                                 lastWasWhiteSpace = false;
 532                                                 val += ' ';
 533                                         }
 534
 535                                         val += ch;
 536
 537                                         // update nesting level
 538                                         switch (ch) {
 539                                                 case '{':
 540                                                         ++nestLevel;
 541                                                         break;
 542                                                 case '}':
 543                                                         --nestLevel;
 544                                                         if (nestLevel < 0) return false;
 545                                                         break;
 546                                         }
 547
 548                                         ifs.get(ch);
 549                                 }
 550
 551                                 if (!ifs)
 552                                         return false;
 553
 554                                 ifs.get(ch);
 555
 556                                 if (!ifs)
 557                                         return false;
 558
 559                         } else {
 560
 561                                 // reading a string name
 562                                 docstring strName;
 563
 564                                 while (ifs && !isSpace(ch) && ch != '#' && ch != ',' && ch != '}' && ch != ')') {
 565                                         strName += lowercase(ch);
 566                                         ifs.get(ch);
 567                                 }
 568
 569                                 if (!ifs)
 570                                         return false;
 571
 572                                 // replace the string with its assigned value or
 573                                 // discard it if it's not assigned
 574                                 if (strName.length()) {
 575                                         VarMap::const_iterator pos = strings.find(strName);
 576                                         if (pos != strings.end()) {
 577                                                 val += pos->second;
 578                                         }
 579                                 }
 580                         }
 581
 582                         // skip WS
 583                         while (ifs && isSpace(ch)) {
 584                                 ifs.get(ch);
 585                         }
 586
 587                         if (!ifs)
 588                                 return false;
 589
 590                         // continue reading next value on concatenate with '#'
 591                 } while (ch == '#');
 592
 593                 ifs.putback(ch);
 594
 595                 return true;
 596         }
 597 }
 598
 599
 600 // This method returns a comma separated list of Bibtex entries
 601 void InsetBibtex::fillWithBibKeys(Buffer const & buffer,
 602                 BiblioInfo & keylist, InsetIterator const & /*di*/) const
 603 {
 604         vector<FileName> const files = getFiles(buffer);
 605         for (vector<FileName>::const_iterator it = files.begin();
 606              it != files.end(); ++ it) {
 607                 // This bibtex parser is a first step to parse bibtex files
 608                 // more precisely.
 609                 //
 610                 // - it reads the whole bibtex entry and does a syntax check
 611                 //   (matching delimiters, missing commas,...
 612                 // - it recovers from errors starting with the next @-character
 613                 // - it reads @string definitions and replaces them in the
 614                 //   field values.
 615                 // - it accepts more characters in keys or value names than
 616                 //   bibtex does.
 617                 //
 618                 // Officially bibtex does only support ASCII, but in practice
 619                 // you can use the encoding of the main document as long as
 620                 // some elements like keys and names are pure ASCII. Therefore
 621                 // we convert the file from the buffer encoding.
 622                 // We don't restrict keys to ASCII in LyX, since our own
 623                 // InsetBibitem can generate non-ASCII keys, and nonstandard
 624                 // 8bit clean bibtex forks exist.
 625
 626                 idocfstream ifs(it->toFilesystemEncoding().c_str(),
 627                         std::ios_base::in,
 628                         buffer.params().encoding().iconvName());
 629
 630                 char_type ch;
 631                 VarMap strings;
 632
 633                 while (ifs) {
 634
 635                         ifs.get(ch);
 636                         if (!ifs)
 637                                 break;
 638
 639                         if (ch != '@')
 640                                 continue;
 641
 642                         docstring entryType;
 643
 644                         if (!readTypeOrKey(entryType, ifs, from_ascii("{("),
 645                                            docstring(), makeLowerCase) || !ifs)
 646                                 continue;
 647
 648                         if (entryType == from_ascii("comment")) {
 649
 650                                 ifs.ignore(std::numeric_limits<int>::max(), '\n');
 651                                 continue;
 652                         }
 653
 654                         ifs.get(ch);
 655                         if (!ifs)
 656                                 break;
 657
 658                         if ((ch != '(') && (ch != '{')) {
 659                                 // invalid entry delimiter
 660                                 ifs.putback(ch);
 661                                 continue;
 662                         }
 663
 664                         // process the entry
 665                         if (entryType == from_ascii("string")) {
 666
 667                                 // read string and add it to the strings map
 668                                 // (or replace it's old value)
 669                                 docstring name;
 670                                 docstring value;
 671
 672                                 if (!readTypeOrKey(name, ifs, from_ascii("="),
 673                                                    from_ascii("#{}(),"), makeLowerCase) || !ifs)
 674                                         continue;
 675
 676                                 // next char must be an equal sign
 677                                 ifs.get(ch);
 678                                 if (!ifs || ch != '=')
 679                                         continue;
 680
 681                                 if (!readValue(value, ifs, strings))
 682                                         continue;
 683
 684                                 strings[name] = value;
 685
 686                         } else if (entryType == from_ascii("preamble")) {
 687
 688                                 // preamble definitions are discarded.
 689                                 // can they be of any use in lyx?
 690                                 docstring value;
 691
 692                                 if (!readValue(value, ifs, strings))
 693                                         continue;
 694
 695                         } else {
 696
 697                                 // Citation entry. Try to read the key.
 698                                 docstring key;
 699
 700                                 if (!readTypeOrKey(key, ifs, from_ascii(","),
 701                                                    from_ascii("}"), keepCase) || !ifs)
 702                                         continue;
 703
 704                                 /////////////////////////////////////////////
 705                                 // now we have a key, so we will add an entry
 706                                 // (even if it's empty, as bibtex does)
 707                                 //
 708                                 // we now read the field = value pairs.
 709                                 // all items must be separated by a comma. If
 710                                 // it is missing the scanning of this entry is
 711                                 // stopped and the next is searched.
 712                                 docstring fields;
 713                                 docstring name;
 714                                 docstring value;
 715                                 docstring commaNewline;
 716                                 docstring data;
 717                                 BibTeXInfo keyvalmap;
 718                                 keyvalmap.entryType = entryType;
 719
 720                                 bool readNext = removeWSAndComma(ifs);
 721
 722                                 while (ifs && readNext) {
 723
 724                                         // read field name
 725                                         if (!readTypeOrKey(name, ifs, from_ascii("="),
 726                                                            from_ascii("{}(),"), makeLowerCase) || !ifs)
 727                                                 break;
 728
 729                                         // next char must be an equal sign
 730                                         ifs.get(ch);
 731                                         if (!ifs)
 732                                                 break;
 733                                         if (ch != '=') {
 734                                                 ifs.putback(ch);
 735                                                 break;
 736                                         }
 737
 738                                         // read field value
 739                                         if (!readValue(value, ifs, strings))
 740                                                 break;
 741
 742                                         keyvalmap[name] = value;
 743                                         data += "\n\n" + value;
 744                                         keylist.fieldNames.insert(name);
 745                                         readNext = removeWSAndComma(ifs);
 746                                 }
 747
 748                                 // add the new entry
 749                                 keylist.entryTypes.insert(entryType);
 750                                 keyvalmap.allData = data;
 751                                 keyvalmap.isBibTeX = true;
 752                                 keyvalmap.bibKey = key;
 753                                 keylist[key] = keyvalmap;
 754                         }
 755                 } //< searching '@'
 756         } //< for loop over files
 757 }
 758
 759
 760
 761 bool InsetBibtex::addDatabase(string const & db)
 762 {
 763         // FIXME UNICODE
 764         string bibfiles(to_utf8(getParam("bibfiles")));
 765         if (tokenPos(bibfiles, ',', db) == -1) {
 766                 if (!bibfiles.empty())
 767                         bibfiles += ',';
 768                 setParam("bibfiles", from_utf8(bibfiles + db));
 769                 return true;
 770         }
 771         return false;
 772 }
 773
 774
 775 bool InsetBibtex::delDatabase(string const & db)
 776 {
 777         // FIXME UNICODE
 778         string bibfiles(to_utf8(getParam("bibfiles")));
 779         if (contains(bibfiles, db)) {
 780                 int const n = tokenPos(bibfiles, ',', db);
 781                 string bd = db;
 782                 if (n > 0) {
 783                         // this is not the first database
 784                         string tmp = ',' + bd;
 785                         setParam("bibfiles", from_utf8(subst(bibfiles, tmp, string())));
 786                 } else if (n == 0)
 787                         // this is the first (or only) database
 788                         setParam("bibfiles", from_utf8(split(bibfiles, bd, ',')));
 789                 else
 790                         return false;
 791         }
 792         return true;
 793 }
 794
 795
 796 void InsetBibtex::validate(LaTeXFeatures & features) const
 797 {
 798         if (features.bufferParams().use_bibtopic)
 799                 features.require("bibtopic");
 800 }
 801
 802
 803 } // namespace lyx