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 "support/debug.h"
  20 #include "Encoding.h"
  21 #include "FuncRequest.h"
  22 #include "support/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/FileNameList.h"
  33 #include "support/filetools.h"
  34 #include "support/lstrings.h"
  35 #include "support/lyxlib.h"
  36 #include "support/os.h"
  37 #include "support/Path.h"
  38 #include "support/textutils.h"
  39
  40 #include <boost/tokenizer.hpp>
  41
  42
  43 namespace lyx {
  44
  45 using support::absolutePath;
  46 using support::ascii_lowercase;
  47 using support::changeExtension;
  48 using support::contains;
  49 using support::copy;
  50 using support::DocFileName;
  51 using support::FileName;
  52 using support::FileNameList;
  53 using support::findtexfile;
  54 using support::isValidLaTeXFilename;
  55 using support::latex_path;
  56 using support::ltrim;
  57 using support::makeAbsPath;
  58 using support::makeRelPath;
  59 using support::prefixIs;
  60 using support::removeExtension;
  61 using support::rtrim;
  62 using support::split;
  63 using support::subst;
  64 using support::tokenPos;
  65 using support::trim;
  66 using support::lowercase;
  67
  68 namespace Alert = frontend::Alert;
  69 namespace os = support::os;
  70
  71 using std::endl;
  72 using std::getline;
  73 using std::string;
  74 using std::ostream;
  75 using std::pair;
  76 using std::vector;
  77 using std::map;
  78
  79
  80 InsetBibtex::InsetBibtex(InsetCommandParams const & p)
  81         : InsetCommand(p, "bibtex")
  82 {}
  83
  84
  85 CommandInfo const * InsetBibtex::findInfo(std::string const & /* cmdName */)
  86 {
  87         static const char * const paramnames[] =
  88                 {"options", "btprint", "bibfiles", ""};
  89         static const bool isoptional[] = {true, true, false};
  90         static const CommandInfo info = {3, paramnames, isoptional};
  91         return &info;
  92 }
  93
  94
  95 Inset * InsetBibtex::clone() const
  96 {
  97         return new InsetBibtex(*this);
  98 }
  99
 100
 101 void InsetBibtex::doDispatch(Cursor & cur, FuncRequest & cmd)
 102 {
 103         switch (cmd.action) {
 104
 105         case LFUN_INSET_MODIFY: {
 106                 InsetCommandParams p(BIBTEX_CODE);
 107                 try {
 108                         if (!InsetCommandMailer::string2params("bibtex",
 109                                         to_utf8(cmd.argument()), p)) {
 110                                 cur.noUpdate();
 111                                 break;
 112                         }
 113                 } catch (support::ExceptionMessage const & message) {
 114                         if (message.type_ == support::WarningException) {
 115                                 Alert::warning(message.title_, message.details_);
 116                                 cur.noUpdate();
 117                         } else
 118                                 throw message;
 119                         break;
 120                 }
 121                 setParams(p);
 122                 cur.buffer().updateBibfilesCache();
 123                 break;
 124         }
 125
 126         default:
 127                 InsetCommand::doDispatch(cur, cmd);
 128                 break;
 129         }
 130 }
 131
 132
 133 docstring const InsetBibtex::getScreenLabel(Buffer const &) const
 134 {
 135         return _("BibTeX Generated Bibliography");
 136 }
 137
 138
 139 namespace {
 140
 141 string normalizeName(Buffer const & buffer, OutputParams const & runparams,
 142                       string const & name, string const & ext)
 143 {
 144         string const fname = makeAbsPath(name, buffer.filePath()).absFilename();
 145         if (absolutePath(name) || !FileName(fname + ext).isReadableFile())
 146                 return name;
 147         if (!runparams.nice)
 148                 return fname;
 149
 150         // FIXME UNICODE
 151         return to_utf8(makeRelPath(from_utf8(fname),
 152                                          from_utf8(buffer.masterBuffer()->filePath())));
 153 }
 154
 155 }
 156
 157
 158 int InsetBibtex::latex(Buffer const & buffer, odocstream & os,
 159                        OutputParams const & runparams) const
 160 {
 161         // the sequence of the commands:
 162         // 1. \bibliographystyle{style}
 163         // 2. \addcontentsline{...} - if option bibtotoc set
 164         // 3. \bibliography{database}
 165         // and with bibtopic:
 166         // 1. \bibliographystyle{style}
 167         // 2. \begin{btSect}{database}
 168         // 3. \btPrint{Cited|NotCited|All}
 169         // 4. \end{btSect}
 170
 171         // Database(s)
 172         // If we are processing the LaTeX file in a temp directory then
 173         // copy the .bib databases to this temp directory, mangling their
 174         // names in the process. Store this mangled name in the list of
 175         // all databases.
 176         // (We need to do all this because BibTeX *really*, *really*
 177         // can't handle "files with spaces" and Windows users tend to
 178         // use such filenames.)
 179         // Otherwise, store the (maybe absolute) path to the original,
 180         // unmangled database name.
 181         typedef boost::char_separator<char_type> Separator;
 182         typedef boost::tokenizer<Separator, docstring::const_iterator, docstring> Tokenizer;
 183
 184         Separator const separator(from_ascii(",").c_str());
 185         // The tokenizer must not be called with temporary strings, since
 186         // it does not make a copy and uses iterators of the string further
 187         // down. getParam returns a reference, so this is OK.
 188         Tokenizer const tokens(getParam("bibfiles"), separator);
 189         Tokenizer::const_iterator const begin = tokens.begin();
 190         Tokenizer::const_iterator const end = tokens.end();
 191
 192         odocstringstream dbs;
 193         for (Tokenizer::const_iterator it = begin; it != end; ++it) {
 194                 docstring const input = trim(*it);
 195                 // FIXME UNICODE
 196                 string utf8input = to_utf8(input);
 197                 string database =
 198                         normalizeName(buffer, runparams, utf8input, ".bib");
 199                 FileName const try_in_file(makeAbsPath(database + ".bib", buffer.filePath()));
 200                 bool const not_from_texmf = try_in_file.isReadableFile();
 201
 202                 if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
 203                     not_from_texmf) {
 204
 205                         // mangledFilename() needs the extension
 206                         DocFileName const in_file = DocFileName(try_in_file);
 207                         database = removeExtension(in_file.mangledFilename());
 208                         FileName const out_file = makeAbsPath(database + ".bib",
 209                                         buffer.masterBuffer()->temppath());
 210
 211                         bool const success = copy(in_file, out_file);
 212                         if (!success) {
 213                                 lyxerr << "Failed to copy '" << in_file
 214                                        << "' to '" << out_file << "'"
 215                                        << endl;
 216                         }
 217                 } else if (!runparams.inComment && runparams.nice && not_from_texmf &&
 218                            !isValidLaTeXFilename(database)) {
 219                                 frontend::Alert::warning(_("Invalid filename"),
 220                                                          _("The following filename is likely to cause trouble "
 221                                                            "when running the exported file through LaTeX: ") +
 222                                                             from_utf8(database));
 223                 }
 224
 225                 if (it != begin)
 226                         dbs << ',';
 227                 // FIXME UNICODE
 228                 dbs << from_utf8(latex_path(database));
 229         }
 230         docstring const db_out = dbs.str();
 231
 232         // Post this warning only once.
 233         static bool warned_about_spaces = false;
 234         if (!warned_about_spaces &&
 235             runparams.nice && db_out.find(' ') != docstring::npos) {
 236                 warned_about_spaces = true;
 237
 238                 Alert::warning(_("Export Warning!"),
 239                                _("There are spaces in the paths to your BibTeX databases.\n"
 240                                               "BibTeX will be unable to find them."));
 241         }
 242
 243         // Style-Options
 244         string style = to_utf8(getParam("options")); // maybe empty! and with bibtotoc
 245         string bibtotoc;
 246         if (prefixIs(style, "bibtotoc")) {
 247                 bibtotoc = "bibtotoc";
 248                 if (contains(style, ','))
 249                         style = split(style, bibtotoc, ',');
 250         }
 251
 252         // line count
 253         int nlines = 0;
 254
 255         if (!style.empty()) {
 256                 string base = normalizeName(buffer, runparams, style, ".bst");
 257                 FileName const try_in_file(makeAbsPath(base + ".bst", buffer.filePath()));
 258                 bool const not_from_texmf = try_in_file.isReadableFile();
 259                 // If this style does not come from texmf and we are not
 260                 // exporting to .tex copy it to the tmp directory.
 261                 // This prevents problems with spaces and 8bit charcaters
 262                 // in the file name.
 263                 if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
 264                     not_from_texmf) {
 265                         // use new style name
 266                         DocFileName const in_file = DocFileName(try_in_file);
 267                         base = removeExtension(in_file.mangledFilename());
 268                         FileName const out_file(makeAbsPath(base + ".bst",
 269                                         buffer.masterBuffer()->temppath()));
 270                         bool const success = copy(in_file, out_file);
 271                         if (!success) {
 272                                 lyxerr << "Failed to copy '" << in_file
 273                                        << "' to '" << out_file << "'"
 274                                        << endl;
 275                         }
 276                 }
 277                 // FIXME UNICODE
 278                 os << "\\bibliographystyle{"
 279                    << from_utf8(latex_path(normalizeName(buffer, runparams, base, ".bst")))
 280                    << "}\n";
 281                 nlines += 1;
 282         }
 283
 284         // Post this warning only once.
 285         static bool warned_about_bst_spaces = false;
 286         if (!warned_about_bst_spaces && runparams.nice && contains(style, ' ')) {
 287                 warned_about_bst_spaces = true;
 288                 Alert::warning(_("Export Warning!"),
 289                                _("There are spaces in the path to your BibTeX style file.\n"
 290                                               "BibTeX will be unable to find it."));
 291         }
 292
 293         if (!db_out.empty() && buffer.params().use_bibtopic){
 294                 os << "\\begin{btSect}{" << db_out << "}\n";
 295                 docstring btprint = getParam("btprint");
 296                 if (btprint.empty())
 297                         // default
 298                         btprint = from_ascii("btPrintCited");
 299                 os << "\\" << btprint << "\n"
 300                    << "\\end{btSect}\n";
 301                 nlines += 3;
 302         }
 303
 304         // bibtotoc-Option
 305         if (!bibtotoc.empty() && !buffer.params().use_bibtopic) {
 306                 // maybe a problem when a textclass has no "art" as
 307                 // part of its name, because it's than book.
 308                 // For the "official" lyx-layouts it's no problem to support
 309                 // all well
 310                 if (!contains(buffer.params().getTextClass().name(),
 311                               "art")) {
 312                         if (buffer.params().sides == OneSide) {
 313                                 // oneside
 314                                 os << "\\clearpage";
 315                         } else {
 316                                 // twoside
 317                                 os << "\\cleardoublepage";
 318                         }
 319
 320                         // bookclass
 321                         os << "\\addcontentsline{toc}{chapter}{\\bibname}";
 322
 323                 } else {
 324                         // article class
 325                         os << "\\addcontentsline{toc}{section}{\\refname}";
 326                 }
 327         }
 328
 329         if (!db_out.empty() && !buffer.params().use_bibtopic){
 330                 os << "\\bibliography{" << db_out << "}\n";
 331                 nlines += 1;
 332         }
 333
 334         return nlines;
 335 }
 336
 337
 338 FileNameList const InsetBibtex::getFiles(Buffer const & buffer) const
 339 {
 340         FileName path(buffer.filePath());
 341         support::PathChanger p(path);
 342
 343         FileNameList vec;
 344
 345         string tmp;
 346         // FIXME UNICODE
 347         string bibfiles = to_utf8(getParam("bibfiles"));
 348         bibfiles = split(bibfiles, tmp, ',');
 349         while (!tmp.empty()) {
 350                 FileName const file = findtexfile(changeExtension(tmp, "bib"), "bib");
 351                 LYXERR(Debug::LATEX, "Bibfile: " << file);
 352
 353                 // If we didn't find a matching file name just fail silently
 354                 if (!file.empty())
 355                         vec.push_back(file);
 356
 357                 // Get next file name
 358                 bibfiles = split(bibfiles, tmp, ',');
 359         }
 360
 361         return vec;
 362 }
 363
 364 namespace {
 365
 366         // methods for parsing bibtex files
 367
 368         typedef map<docstring, docstring> VarMap;
 369
 370         /// remove whitespace characters, optionally a single comma,
 371         /// and further whitespace characters from the stream.
 372         /// @return true if a comma was found, false otherwise
 373         ///
 374         bool removeWSAndComma(idocfstream & ifs) {
 375                 char_type ch;
 376
 377                 if (!ifs)
 378                         return false;
 379
 380                 // skip whitespace
 381                 do {
 382                         ifs.get(ch);
 383                 } while (ifs && isSpace(ch));
 384
 385                 if (!ifs)
 386                         return false;
 387
 388                 if (ch != ',') {
 389                         ifs.putback(ch);
 390                         return false;
 391                 }
 392
 393                 // skip whitespace
 394                 do {
 395                         ifs.get(ch);
 396                 } while (ifs && isSpace(ch));
 397
 398                 if (ifs) {
 399                         ifs.putback(ch);
 400                 }
 401
 402                 return true;
 403         }
 404
 405
 406         enum charCase {
 407                 makeLowerCase,
 408                 keepCase
 409         };
 410
 411         /// remove whitespace characters, read characer sequence
 412         /// not containing whitespace characters or characters in
 413         /// delimChars, and remove further whitespace characters.
 414         ///
 415         /// @return true if a string of length > 0 could be read.
 416         ///
 417         bool readTypeOrKey(docstring & val, idocfstream & ifs,
 418                 docstring const & delimChars, docstring const &illegalChars,
 419                 charCase chCase) {
 420
 421                 char_type ch;
 422
 423                 val.clear();
 424
 425                 if (!ifs)
 426                         return false;
 427
 428                 // skip whitespace
 429                 do {
 430                         ifs.get(ch);
 431                 } while (ifs && isSpace(ch));
 432
 433                 if (!ifs)
 434                         return false;
 435
 436                 // read value
 437                 bool legalChar = true;
 438                 while (ifs && !isSpace(ch) &&
 439                                                  delimChars.find(ch) == docstring::npos &&
 440                                                  (legalChar = (illegalChars.find(ch) == docstring::npos))
 441                                         )
 442                 {
 443                         if (chCase == makeLowerCase)
 444                                 val += lowercase(ch);
 445                         else
 446                                 val += ch;
 447                         ifs.get(ch);
 448                 }
 449
 450                 if (!legalChar) {
 451                         ifs.putback(ch);
 452                         return false;
 453                 }
 454
 455                 // skip whitespace
 456                 while (ifs && isSpace(ch)) {
 457                         ifs.get(ch);
 458                 }
 459
 460                 if (ifs) {
 461                         ifs.putback(ch);
 462                 }
 463
 464                 return val.length() > 0;
 465         }
 466
 467         /// read subsequent bibtex values that are delimited with a #-character.
 468         /// Concatenate all parts and replace names with the associated string in
 469         /// the variable strings.
 470         /// @return true if reading was successfull (all single parts were delimited
 471         /// correctly)
 472         bool readValue(docstring & val, idocfstream & ifs, const VarMap & strings) {
 473
 474                 char_type ch;
 475
 476                 val.clear();
 477
 478                 if (!ifs)
 479                         return false;
 480
 481                 do {
 482                         // skip whitespace
 483                         do {
 484                                 ifs.get(ch);
 485                         } while (ifs && isSpace(ch));
 486
 487                         if (!ifs)
 488                                 return false;
 489
 490                         // check for field type
 491                         if (isDigit(ch)) {
 492
 493                                 // read integer value
 494                                 do {
 495                                         val += ch;
 496                                         ifs.get(ch);
 497                                 } while (ifs && isDigit(ch));
 498
 499                                 if (!ifs)
 500                                         return false;
 501
 502                         } else if (ch == '"' || ch == '{') {
 503                                 // set end delimiter
 504                                 char_type delim = ch == '"' ? '"': '}';
 505
 506                                 //Skip whitespace
 507                                 do {
 508                                         ifs.get(ch);
 509                                 } while (ifs && isSpace(ch));
 510
 511                                 if (!ifs)
 512                                         return false;
 513
 514                                 //We now have the first non-whitespace character
 515                                 //We'll collapse adjacent whitespace.
 516                                 bool lastWasWhiteSpace = false;
 517
 518                                 // inside this delimited text braces must match.
 519                                 // Thus we can have a closing delimiter only
 520                                 // when nestLevel == 0
 521                                 int nestLevel = 0;
 522
 523                                 while (ifs && (nestLevel > 0 || ch != delim)) {
 524                                         if (isSpace(ch)) {
 525                                                 lastWasWhiteSpace = true;
 526                                                 ifs.get(ch);
 527                                                 continue;
 528                                         }
 529                                         //We output the space only after we stop getting
 530                                         //whitespace so as not to output any whitespace
 531                                         //at the end of the value.
 532                                         if (lastWasWhiteSpace) {
 533                                                 lastWasWhiteSpace = false;
 534                                                 val += ' ';
 535                                         }
 536
 537                                         val += ch;
 538
 539                                         // update nesting level
 540                                         switch (ch) {
 541                                                 case '{':
 542                                                         ++nestLevel;
 543                                                         break;
 544                                                 case '}':
 545                                                         --nestLevel;
 546                                                         if (nestLevel < 0) return false;
 547                                                         break;
 548                                         }
 549
 550                                         ifs.get(ch);
 551                                 }
 552
 553                                 if (!ifs)
 554                                         return false;
 555
 556                                 ifs.get(ch);
 557
 558                                 if (!ifs)
 559                                         return false;
 560
 561                         } else {
 562
 563                                 // reading a string name
 564                                 docstring strName;
 565
 566                                 while (ifs && !isSpace(ch) && ch != '#' && ch != ',' && ch != '}' && ch != ')') {
 567                                         strName += lowercase(ch);
 568                                         ifs.get(ch);
 569                                 }
 570
 571                                 if (!ifs)
 572                                         return false;
 573
 574                                 // replace the string with its assigned value or
 575                                 // discard it if it's not assigned
 576                                 if (strName.length()) {
 577                                         VarMap::const_iterator pos = strings.find(strName);
 578                                         if (pos != strings.end()) {
 579                                                 val += pos->second;
 580                                         }
 581                                 }
 582                         }
 583
 584                         // skip WS
 585                         while (ifs && isSpace(ch)) {
 586                                 ifs.get(ch);
 587                         }
 588
 589                         if (!ifs)
 590                                 return false;
 591
 592                         // continue reading next value on concatenate with '#'
 593                 } while (ch == '#');
 594
 595                 ifs.putback(ch);
 596
 597                 return true;
 598         }
 599 }
 600
 601
 602 // This method returns a comma separated list of Bibtex entries
 603 void InsetBibtex::fillWithBibKeys(Buffer const & buffer,
 604                 BiblioInfo & keylist, InsetIterator const & /*di*/) const
 605 {
 606         FileNameList const files = getFiles(buffer);
 607         for (vector<FileName>::const_iterator it = files.begin();
 608              it != files.end(); ++ it) {
 609                 // This bibtex parser is a first step to parse bibtex files
 610                 // more precisely.
 611                 //
 612                 // - it reads the whole bibtex entry and does a syntax check
 613                 //   (matching delimiters, missing commas,...
 614                 // - it recovers from errors starting with the next @-character
 615                 // - it reads @string definitions and replaces them in the
 616                 //   field values.
 617                 // - it accepts more characters in keys or value names than
 618                 //   bibtex does.
 619                 //
 620                 // Officially bibtex does only support ASCII, but in practice
 621                 // you can use the encoding of the main document as long as
 622                 // some elements like keys and names are pure ASCII. Therefore
 623                 // we convert the file from the buffer encoding.
 624                 // We don't restrict keys to ASCII in LyX, since our own
 625                 // InsetBibitem can generate non-ASCII keys, and nonstandard
 626                 // 8bit clean bibtex forks exist.
 627
 628                 idocfstream ifs(it->toFilesystemEncoding().c_str(),
 629                         std::ios_base::in,
 630                         buffer.params().encoding().iconvName());
 631
 632                 char_type ch;
 633                 VarMap strings;
 634
 635                 while (ifs) {
 636
 637                         ifs.get(ch);
 638                         if (!ifs)
 639                                 break;
 640
 641                         if (ch != '@')
 642                                 continue;
 643
 644                         docstring entryType;
 645
 646                         if (!readTypeOrKey(entryType, ifs, from_ascii("{("),
 647                                            docstring(), makeLowerCase) || !ifs)
 648                                 continue;
 649
 650                         if (entryType == from_ascii("comment")) {
 651
 652                                 ifs.ignore(std::numeric_limits<int>::max(), '\n');
 653                                 continue;
 654                         }
 655
 656                         ifs.get(ch);
 657                         if (!ifs)
 658                                 break;
 659
 660                         if ((ch != '(') && (ch != '{')) {
 661                                 // invalid entry delimiter
 662                                 ifs.putback(ch);
 663                                 continue;
 664                         }
 665
 666                         // process the entry
 667                         if (entryType == from_ascii("string")) {
 668
 669                                 // read string and add it to the strings map
 670                                 // (or replace it's old value)
 671                                 docstring name;
 672                                 docstring value;
 673
 674                                 if (!readTypeOrKey(name, ifs, from_ascii("="),
 675                                                    from_ascii("#{}(),"), makeLowerCase) || !ifs)
 676                                         continue;
 677
 678                                 // next char must be an equal sign
 679                                 ifs.get(ch);
 680                                 if (!ifs || ch != '=')
 681                                         continue;
 682
 683                                 if (!readValue(value, ifs, strings))
 684                                         continue;
 685
 686                                 strings[name] = value;
 687
 688                         } else if (entryType == from_ascii("preamble")) {
 689
 690                                 // preamble definitions are discarded.
 691                                 // can they be of any use in lyx?
 692                                 docstring value;
 693
 694                                 if (!readValue(value, ifs, strings))
 695                                         continue;
 696
 697                         } else {
 698
 699                                 // Citation entry. Try to read the key.
 700                                 docstring key;
 701
 702                                 if (!readTypeOrKey(key, ifs, from_ascii(","),
 703                                                    from_ascii("}"), keepCase) || !ifs)
 704                                         continue;
 705
 706                                 /////////////////////////////////////////////
 707                                 // now we have a key, so we will add an entry
 708                                 // (even if it's empty, as bibtex does)
 709                                 //
 710                                 // we now read the field = value pairs.
 711                                 // all items must be separated by a comma. If
 712                                 // it is missing the scanning of this entry is
 713                                 // stopped and the next is searched.
 714                                 docstring fields;
 715                                 docstring name;
 716                                 docstring value;
 717                                 docstring commaNewline;
 718                                 docstring data;
 719                                 BibTeXInfo keyvalmap;
 720                                 keyvalmap.entryType = entryType;
 721
 722                                 bool readNext = removeWSAndComma(ifs);
 723
 724                                 while (ifs && readNext) {
 725
 726                                         // read field name
 727                                         if (!readTypeOrKey(name, ifs, from_ascii("="),
 728                                                            from_ascii("{}(),"), makeLowerCase) || !ifs)
 729                                                 break;
 730
 731                                         // next char must be an equal sign
 732                                         ifs.get(ch);
 733                                         if (!ifs)
 734                                                 break;
 735                                         if (ch != '=') {
 736                                                 ifs.putback(ch);
 737                                                 break;
 738                                         }
 739
 740                                         // read field value
 741                                         if (!readValue(value, ifs, strings))
 742                                                 break;
 743
 744                                         keyvalmap[name] = value;
 745                                         data += "\n\n" + value;
 746                                         keylist.fieldNames.insert(name);
 747                                         readNext = removeWSAndComma(ifs);
 748                                 }
 749
 750                                 // add the new entry
 751                                 keylist.entryTypes.insert(entryType);
 752                                 keyvalmap.allData = data;
 753                                 keyvalmap.isBibTeX = true;
 754                                 keyvalmap.bibKey = key;
 755                                 keylist[key] = keyvalmap;
 756                         }
 757                 } //< searching '@'
 758         } //< for loop over files
 759 }
 760
 761
 762
 763 bool InsetBibtex::addDatabase(string const & db)
 764 {
 765         // FIXME UNICODE
 766         string bibfiles(to_utf8(getParam("bibfiles")));
 767         if (tokenPos(bibfiles, ',', db) == -1) {
 768                 if (!bibfiles.empty())
 769                         bibfiles += ',';
 770                 setParam("bibfiles", from_utf8(bibfiles + db));
 771                 return true;
 772         }
 773         return false;
 774 }
 775
 776
 777 bool InsetBibtex::delDatabase(string const & db)
 778 {
 779         // FIXME UNICODE
 780         string bibfiles(to_utf8(getParam("bibfiles")));
 781         if (contains(bibfiles, db)) {
 782                 int const n = tokenPos(bibfiles, ',', db);
 783                 string bd = db;
 784                 if (n > 0) {
 785                         // this is not the first database
 786                         string tmp = ',' + bd;
 787                         setParam("bibfiles", from_utf8(subst(bibfiles, tmp, string())));
 788                 } else if (n == 0)
 789                         // this is the first (or only) database
 790                         setParam("bibfiles", from_utf8(split(bibfiles, bd, ',')));
 791                 else
 792                         return false;
 793         }
 794         return true;
 795 }
 796
 797
 798 void InsetBibtex::validate(LaTeXFeatures & features) const
 799 {
 800         if (features.bufferParams().use_bibtopic)
 801                 features.require("bibtopic");
 802 }
 803
 804
 805 } // namespace lyx