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