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