src/insets/InsetBibtex.cpp

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