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