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 "BiblioInfo.h"
  17 #include "Buffer.h"
  18 #include "BufferParams.h"
  19 #include "Cursor.h"
  20 #include "DispatchResult.h"
  21 #include "Encoding.h"
  22 #include "Format.h"
  23 #include "FuncRequest.h"
  24 #include "FuncStatus.h"
  25 #include "Language.h"
  26 #include "LaTeXFeatures.h"
  27 #include "output_xhtml.h"
  28 #include "OutputParams.h"
  29 #include "PDFOptions.h"
  30 #include "TextClass.h"
  31
  32 #include "frontends/alert.h"
  33
  34 #include "support/convert.h"
  35 #include "support/debug.h"
  36 #include "support/docstream.h"
  37 #include "support/ExceptionMessage.h"
  38 #include "support/FileNameList.h"
  39 #include "support/filetools.h"
  40 #include "support/gettext.h"
  41 #include "support/lstrings.h"
  42 #include "support/os.h"
  43 #include "support/Path.h"
  44 #include "support/textutils.h"
  45
  46 #include <limits>
  47
  48 using namespace std;
  49 using namespace lyx::support;
  50
  51 namespace lyx {
  52
  53 namespace Alert = frontend::Alert;
  54 namespace os = support::os;
  55
  56
  57 InsetBibtex::InsetBibtex(Buffer * buf, InsetCommandParams const & p)
  58         : InsetCommand(buf, p)
  59 {
  60         buffer().invalidateBibinfoCache();
  61 }
  62
  63
  64 InsetBibtex::~InsetBibtex()
  65 {
  66         if (isBufferLoaded())
  67                 buffer().invalidateBibfileCache();
  68 }
  69
  70
  71 ParamInfo const & InsetBibtex::findInfo(string const & /* cmdName */)
  72 {
  73         static ParamInfo param_info_;
  74         if (param_info_.empty()) {
  75                 param_info_.add("btprint", ParamInfo::LATEX_OPTIONAL);
  76                 param_info_.add("bibfiles", ParamInfo::LATEX_REQUIRED);
  77                 param_info_.add("options", ParamInfo::LYX_INTERNAL);
  78         }
  79         return param_info_;
  80 }
  81
  82
  83 void InsetBibtex::doDispatch(Cursor & cur, FuncRequest & cmd)
  84 {
  85         switch (cmd.action()) {
  86
  87         case LFUN_INSET_EDIT:
  88                 editDatabases();
  89                 break;
  90
  91         case LFUN_INSET_MODIFY: {
  92                 InsetCommandParams p(BIBTEX_CODE);
  93                 try {
  94                         if (!InsetCommand::string2params(to_utf8(cmd.argument()), p)) {
  95                                 cur.noScreenUpdate();
  96                                 break;
  97                         }
  98                 } catch (ExceptionMessage const & message) {
  99                         if (message.type_ == WarningException) {
 100                                 Alert::warning(message.title_, message.details_);
 101                                 cur.noScreenUpdate();
 102                         } else
 103                                 throw message;
 104                         break;
 105                 }
 106
 107                 cur.recordUndo();
 108                 setParams(p);
 109                 buffer().invalidateBibfileCache();
 110                 cur.forceBufferUpdate();
 111                 break;
 112         }
 113
 114         default:
 115                 InsetCommand::doDispatch(cur, cmd);
 116                 break;
 117         }
 118 }
 119
 120
 121 bool InsetBibtex::getStatus(Cursor & cur, FuncRequest const & cmd,
 122                 FuncStatus & flag) const
 123 {
 124         switch (cmd.action()) {
 125         case LFUN_INSET_EDIT:
 126                 flag.setEnabled(true);
 127                 return true;
 128
 129         default:
 130                 return InsetCommand::getStatus(cur, cmd, flag);
 131         }
 132 }
 133
 134
 135 void InsetBibtex::editDatabases() const
 136 {
 137         vector<docstring> bibfilelist = getVectorFromString(getParam("bibfiles"));
 138
 139         if (bibfilelist.empty())
 140                 return;
 141
 142         int nr_databases = bibfilelist.size();
 143         if (nr_databases > 1) {
 144                         docstring message = bformat(_("The BibTeX inset includes %1$s databases.\n"
 145                                                        "If you proceed, all of them will be opened."),
 146                                                         convert<docstring>(nr_databases));
 147                         int const ret = Alert::prompt(_("Open Databases?"),
 148                                 message, 0, 1, _("&Cancel"), _("&Proceed"));
 149
 150                         if (ret == 0)
 151                                 return;
 152         }
 153
 154         vector<docstring>::const_iterator it = bibfilelist.begin();
 155         vector<docstring>::const_iterator en = bibfilelist.end();
 156         for (; it != en; ++it) {
 157                 FileName const bibfile = getBibTeXPath(*it, buffer());
 158                 formats.edit(buffer(), bibfile,
 159                      formats.getFormatFromFile(bibfile));
 160         }
 161 }
 162
 163
 164 docstring InsetBibtex::screenLabel() const
 165 {
 166         return _("BibTeX Generated Bibliography");
 167 }
 168
 169
 170 docstring InsetBibtex::toolTip(BufferView const & /*bv*/, int /*x*/, int /*y*/) const
 171 {
 172         docstring item = from_ascii("* ");
 173         docstring tip = _("Databases:") + "\n";
 174         vector<docstring> bibfilelist = getVectorFromString(getParam("bibfiles"));
 175
 176         if (bibfilelist.empty()) {
 177                 tip += item;
 178                 tip += _("none");
 179         } else {
 180                 vector<docstring>::const_iterator it = bibfilelist.begin();
 181                 vector<docstring>::const_iterator en = bibfilelist.end();
 182                 for (; it != en; ++it) {
 183                         tip += item;
 184                         tip += *it + "\n";
 185                 }
 186         }
 187
 188         // Style-Options
 189         bool toc = false;
 190         docstring style = getParam("options"); // maybe empty! and with bibtotoc
 191         docstring bibtotoc = from_ascii("bibtotoc");
 192         if (prefixIs(style, bibtotoc)) {
 193                 toc = true;
 194                 if (contains(style, char_type(',')))
 195                         style = split(style, bibtotoc, char_type(','));
 196         }
 197
 198         tip += _("Style File:") +"\n";
 199         tip += item;
 200         if (!style.empty())
 201                 tip += style;
 202         else
 203                 tip += _("none");
 204
 205         tip += "\n" + _("Lists:") + " ";
 206         docstring btprint = getParam("btprint");
 207                 if (btprint == "btPrintAll")
 208                         tip += _("all references");
 209                 else if (btprint == "btPrintNotCited")
 210                         tip += _("all uncited references");
 211                 else
 212                         tip += _("all cited references");
 213
 214         if (toc) {
 215                 tip += ", ";
 216                 tip += _("included in TOC");
 217         }
 218
 219         return tip;
 220 }
 221
 222
 223 static string normalizeName(Buffer const & buffer,
 224         OutputParams const & runparams, string const & name, string const & ext)
 225 {
 226         string const fname = makeAbsPath(name, buffer.filePath()).absFileName();
 227         if (FileName::isAbsolute(name) || !FileName(fname + ext).isReadableFile())
 228                 return name;
 229         if (!runparams.nice)
 230                 return fname;
 231
 232         // FIXME UNICODE
 233         return to_utf8(makeRelPath(from_utf8(fname),
 234                                          from_utf8(buffer.masterBuffer()->filePath())));
 235 }
 236
 237
 238 void InsetBibtex::latex(otexstream & os, OutputParams const & runparams) const
 239 {
 240         // the sequence of the commands:
 241         // 1. \bibliographystyle{style}
 242         // 2. \addcontentsline{...} - if option bibtotoc set
 243         // 3. \bibliography{database}
 244         // and with bibtopic:
 245         // 1. \bibliographystyle{style}
 246         // 2. \begin{btSect}{database}
 247         // 3. \btPrint{Cited|NotCited|All}
 248         // 4. \end{btSect}
 249
 250         // Database(s)
 251         // If we are processing the LaTeX file in a temp directory then
 252         // copy the .bib databases to this temp directory, mangling their
 253         // names in the process. Store this mangled name in the list of
 254         // all databases.
 255         // (We need to do all this because BibTeX *really*, *really*
 256         // can't handle "files with spaces" and Windows users tend to
 257         // use such filenames.)
 258         // Otherwise, store the (maybe absolute) path to the original,
 259         // unmangled database name.
 260         vector<docstring> bibfilelist = getVectorFromString(getParam("bibfiles"));
 261         vector<docstring>::const_iterator it = bibfilelist.begin();
 262         vector<docstring>::const_iterator en = bibfilelist.end();
 263         odocstringstream dbs;
 264         bool didone = false;
 265
 266         for (; it != en; ++it) {
 267                 string utf8input = to_utf8(*it);
 268                 string database =
 269                         normalizeName(buffer(), runparams, utf8input, ".bib");
 270                 FileName const try_in_file =
 271                         makeAbsPath(database + ".bib", buffer().filePath());
 272                 bool const not_from_texmf = try_in_file.isReadableFile();
 273
 274                 if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
 275                     not_from_texmf) {
 276                         // mangledFileName() needs the extension
 277                         DocFileName const in_file = DocFileName(try_in_file);
 278                         database = removeExtension(in_file.mangledFileName());
 279                         FileName const out_file = makeAbsPath(database + ".bib",
 280                                         buffer().masterBuffer()->temppath());
 281
 282                         bool const success = in_file.copyTo(out_file);
 283                         if (!success) {
 284                                 lyxerr << "Failed to copy '" << in_file
 285                                        << "' to '" << out_file << "'"
 286                                        << endl;
 287                         }
 288                 } else if (!runparams.inComment && runparams.nice && not_from_texmf) {
 289                         if (!isValidLaTeXFileName(database)) {
 290                                 frontend::Alert::warning(_("Invalid filename"),
 291                                          _("The following filename will cause troubles "
 292                                                "when running the exported file through LaTeX: ") +
 293                                              from_utf8(database));
 294                         }
 295                         if (!isValidDVIFileName(database)) {
 296                                 frontend::Alert::warning(_("Problematic filename for DVI"),
 297                                          _("The following filename can cause troubles "
 298                                                "when running the exported file through LaTeX "
 299                                                    "and opening the resulting DVI: ") +
 300                                              from_utf8(database), true);
 301                         }
 302                 }
 303
 304                 if (didone)
 305                         dbs << ',';
 306                 else
 307                         didone = true;
 308                 // FIXME UNICODE
 309                 dbs << from_utf8(latex_path(database));
 310         }
 311         docstring const db_out = dbs.str();
 312
 313         // Post this warning only once.
 314         static bool warned_about_spaces = false;
 315         if (!warned_about_spaces &&
 316             runparams.nice && db_out.find(' ') != docstring::npos) {
 317                 warned_about_spaces = true;
 318                 Alert::warning(_("Export Warning!"),
 319                                _("There are spaces in the paths to your BibTeX databases.\n"
 320                                               "BibTeX will be unable to find them."));
 321         }
 322         // Style-Options
 323         string style = to_utf8(getParam("options")); // maybe empty! and with bibtotoc
 324         string bibtotoc;
 325         if (prefixIs(style, "bibtotoc")) {
 326                 bibtotoc = "bibtotoc";
 327                 if (contains(style, ','))
 328                         style = split(style, bibtotoc, ',');
 329         }
 330
 331         if (!style.empty()) {
 332                 string base = normalizeName(buffer(), runparams, style, ".bst");
 333                 FileName const try_in_file =
 334                         makeAbsPath(base + ".bst", buffer().filePath());
 335                 bool const not_from_texmf = try_in_file.isReadableFile();
 336                 // If this style does not come from texmf and we are not
 337                 // exporting to .tex copy it to the tmp directory.
 338                 // This prevents problems with spaces and 8bit charcaters
 339                 // in the file name.
 340                 if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
 341                     not_from_texmf) {
 342                         // use new style name
 343                         DocFileName const in_file = DocFileName(try_in_file);
 344                         base = removeExtension(in_file.mangledFileName());
 345                         FileName const out_file = makeAbsPath(base + ".bst",
 346                                         buffer().masterBuffer()->temppath());
 347                         bool const success = in_file.copyTo(out_file);
 348                         if (!success) {
 349                                 lyxerr << "Failed to copy '" << in_file
 350                                        << "' to '" << out_file << "'"
 351                                        << endl;
 352                         }
 353                 }
 354                 // FIXME UNICODE
 355                 os << "\\bibliographystyle{"
 356                    << from_utf8(latex_path(normalizeName(buffer(), runparams, base, ".bst")))
 357                    << "}\n";
 358         }
 359
 360         // Post this warning only once.
 361         static bool warned_about_bst_spaces = false;
 362         if (!warned_about_bst_spaces && runparams.nice && contains(style, ' ')) {
 363                 warned_about_bst_spaces = true;
 364                 Alert::warning(_("Export Warning!"),
 365                                _("There are spaces in the path to your BibTeX style file.\n"
 366                                               "BibTeX will be unable to find it."));
 367         }
 368
 369         if (!db_out.empty() && buffer().params().use_bibtopic) {
 370                 os << "\\begin{btSect}{" << db_out << "}\n";
 371                 docstring btprint = getParam("btprint");
 372                 if (btprint.empty())
 373                         // default
 374                         btprint = from_ascii("btPrintCited");
 375                 os << "\\" << btprint << "\n"
 376                    << "\\end{btSect}\n";
 377         }
 378
 379         // bibtotoc-Option
 380         if (!bibtotoc.empty() && !buffer().params().use_bibtopic) {
 381                 // set label for hyperref, see http://www.lyx.org/trac/ticket/6470
 382                 if (buffer().params().pdfoptions().use_hyperref)
 383                                 os << "\\phantomsection";
 384                 if (buffer().params().documentClass().hasLaTeXLayout("chapter"))
 385                         os << "\\addcontentsline{toc}{chapter}{\\bibname}";
 386                 else if (buffer().params().documentClass().hasLaTeXLayout("section"))
 387                         os << "\\addcontentsline{toc}{section}{\\refname}";
 388         }
 389
 390         if (!db_out.empty() && !buffer().params().use_bibtopic) {
 391                 docstring btprint = getParam("btprint");
 392                 if (btprint == "btPrintAll") {
 393                         os << "\\nocite{*}\n";
 394                 }
 395                 os << "\\bibliography{" << db_out << "}\n";
 396         }
 397 }
 398
 399
 400 support::FileNameList InsetBibtex::getBibFiles() const
 401 {
 402         FileName path(buffer().filePath());
 403         support::PathChanger p(path);
 404
 405         support::FileNameList vec;
 406
 407         vector<docstring> bibfilelist = getVectorFromString(getParam("bibfiles"));
 408         vector<docstring>::const_iterator it = bibfilelist.begin();
 409         vector<docstring>::const_iterator en = bibfilelist.end();
 410         for (; it != en; ++it) {
 411                 FileName const file = getBibTeXPath(*it, buffer());
 412
 413                 if (!file.empty())
 414                         vec.push_back(file);
 415                 else
 416                         LYXERR0("Couldn't find " + to_utf8(*it) + " in InsetBibtex::getBibFiles()!");
 417         }
 418
 419         return vec;
 420
 421 }
 422
 423 namespace {
 424
 425         // methods for parsing bibtex files
 426
 427         typedef map<docstring, docstring> VarMap;
 428
 429         /// remove whitespace characters, optionally a single comma,
 430         /// and further whitespace characters from the stream.
 431         /// @return true if a comma was found, false otherwise
 432         ///
 433         bool removeWSAndComma(ifdocstream & ifs) {
 434                 char_type ch;
 435
 436                 if (!ifs)
 437                         return false;
 438
 439                 // skip whitespace
 440                 do {
 441                         ifs.get(ch);
 442                 } while (ifs && isSpace(ch));
 443
 444                 if (!ifs)
 445                         return false;
 446
 447                 if (ch != ',') {
 448                         ifs.putback(ch);
 449                         return false;
 450                 }
 451
 452                 // skip whitespace
 453                 do {
 454                         ifs.get(ch);
 455                 } while (ifs && isSpace(ch));
 456
 457                 if (ifs) {
 458                         ifs.putback(ch);
 459                 }
 460
 461                 return true;
 462         }
 463
 464
 465         enum charCase {
 466                 makeLowerCase,
 467                 keepCase
 468         };
 469
 470         /// remove whitespace characters, read characer sequence
 471         /// not containing whitespace characters or characters in
 472         /// delimChars, and remove further whitespace characters.
 473         ///
 474         /// @return true if a string of length > 0 could be read.
 475         ///
 476         bool readTypeOrKey(docstring & val, ifdocstream & ifs,
 477                 docstring const & delimChars, docstring const & illegalChars,
 478                 charCase chCase) {
 479
 480                 char_type ch;
 481
 482                 val.clear();
 483
 484                 if (!ifs)
 485                         return false;
 486
 487                 // skip whitespace
 488                 do {
 489                         ifs.get(ch);
 490                 } while (ifs && isSpace(ch));
 491
 492                 if (!ifs)
 493                         return false;
 494
 495                 // read value
 496                 bool legalChar = true;
 497                 while (ifs && !isSpace(ch) &&
 498                                                  delimChars.find(ch) == docstring::npos &&
 499                                                  (legalChar = (illegalChars.find(ch) == docstring::npos))
 500                                         )
 501                 {
 502                         if (chCase == makeLowerCase)
 503                                 val += lowercase(ch);
 504                         else
 505                                 val += ch;
 506                         ifs.get(ch);
 507                 }
 508
 509                 if (!legalChar) {
 510                         ifs.putback(ch);
 511                         return false;
 512                 }
 513
 514                 // skip whitespace
 515                 while (ifs && isSpace(ch)) {
 516                         ifs.get(ch);
 517                 }
 518
 519                 if (ifs) {
 520                         ifs.putback(ch);
 521                 }
 522
 523                 return val.length() > 0;
 524         }
 525
 526         /// read subsequent bibtex values that are delimited with a #-character.
 527         /// Concatenate all parts and replace names with the associated string in
 528         /// the variable strings.
 529         /// @return true if reading was successfull (all single parts were delimited
 530         /// correctly)
 531         bool readValue(docstring & val, ifdocstream & ifs, const VarMap & strings) {
 532
 533                 char_type ch;
 534
 535                 val.clear();
 536
 537                 if (!ifs)
 538                         return false;
 539
 540                 do {
 541                         // skip whitespace
 542                         do {
 543                                 ifs.get(ch);
 544                         } while (ifs && isSpace(ch));
 545
 546                         if (!ifs)
 547                                 return false;
 548
 549                         // check for field type
 550                         if (isDigitASCII(ch)) {
 551
 552                                 // read integer value
 553                                 do {
 554                                         val += ch;
 555                                         ifs.get(ch);
 556                                 } while (ifs && isDigitASCII(ch));
 557
 558                                 if (!ifs)
 559                                         return false;
 560
 561                         } else if (ch == '"' || ch == '{') {
 562                                 // set end delimiter
 563                                 char_type delim = ch == '"' ? '"': '}';
 564
 565                                 // Skip whitespace
 566                                 do {
 567                                         ifs.get(ch);
 568                                 } while (ifs && isSpace(ch));
 569
 570                                 if (!ifs)
 571                                         return false;
 572
 573                                 // We now have the first non-whitespace character
 574                                 // We'll collapse adjacent whitespace.
 575                                 bool lastWasWhiteSpace = false;
 576
 577                                 // inside this delimited text braces must match.
 578                                 // Thus we can have a closing delimiter only
 579                                 // when nestLevel == 0
 580                                 int nestLevel = 0;
 581
 582                                 while (ifs && (nestLevel > 0 || ch != delim)) {
 583                                         if (isSpace(ch)) {
 584                                                 lastWasWhiteSpace = true;
 585                                                 ifs.get(ch);
 586                                                 continue;
 587                                         }
 588                                         // We output the space only after we stop getting
 589                                         // whitespace so as not to output any whitespace
 590                                         // at the end of the value.
 591                                         if (lastWasWhiteSpace) {
 592                                                 lastWasWhiteSpace = false;
 593                                                 val += ' ';
 594                                         }
 595
 596                                         val += ch;
 597
 598                                         // update nesting level
 599                                         switch (ch) {
 600                                                 case '{':
 601                                                         ++nestLevel;
 602                                                         break;
 603                                                 case '}':
 604                                                         --nestLevel;
 605                                                         if (nestLevel < 0)
 606                                                                 return false;
 607                                                         break;
 608                                         }
 609
 610                                         if (ifs)
 611                                                 ifs.get(ch);
 612                                 }
 613
 614                                 if (!ifs)
 615                                         return false;
 616
 617                                 // FIXME Why is this here?
 618                                 ifs.get(ch);
 619
 620                                 if (!ifs)
 621                                         return false;
 622
 623                         } else {
 624
 625                                 // reading a string name
 626                                 docstring strName;
 627
 628                                 while (ifs && !isSpace(ch) && ch != '#' && ch != ',' && ch != '}' && ch != ')') {
 629                                         strName += lowercase(ch);
 630                                         ifs.get(ch);
 631                                 }
 632
 633                                 if (!ifs)
 634                                         return false;
 635
 636                                 // replace the string with its assigned value or
 637                                 // discard it if it's not assigned
 638                                 if (strName.length()) {
 639                                         VarMap::const_iterator pos = strings.find(strName);
 640                                         if (pos != strings.end()) {
 641                                                 val += pos->second;
 642                                         }
 643                                 }
 644                         }
 645
 646                         // skip WS
 647                         while (ifs && isSpace(ch)) {
 648                                 ifs.get(ch);
 649                         }
 650
 651                         if (!ifs)
 652                                 return false;
 653
 654                         // continue reading next value on concatenate with '#'
 655                 } while (ch == '#');
 656
 657                 ifs.putback(ch);
 658
 659                 return true;
 660         }
 661 }
 662
 663
 664 void InsetBibtex::collectBibKeys(InsetIterator const & /*di*/) const
 665 {
 666         parseBibTeXFiles();
 667 }
 668
 669
 670 void InsetBibtex::parseBibTeXFiles() const
 671 {
 672         // This bibtex parser is a first step to parse bibtex files
 673         // more precisely.
 674         //
 675         // - it reads the whole bibtex entry and does a syntax check
 676         //   (matching delimiters, missing commas,...
 677         // - it recovers from errors starting with the next @-character
 678         // - it reads @string definitions and replaces them in the
 679         //   field values.
 680         // - it accepts more characters in keys or value names than
 681         //   bibtex does.
 682         //
 683         // Officially bibtex does only support ASCII, but in practice
 684         // you can use the encoding of the main document as long as
 685         // some elements like keys and names are pure ASCII. Therefore
 686         // we convert the file from the buffer encoding.
 687         // We don't restrict keys to ASCII in LyX, since our own
 688         // InsetBibitem can generate non-ASCII keys, and nonstandard
 689         // 8bit clean bibtex forks exist.
 690
 691         BiblioInfo keylist;
 692
 693         support::FileNameList const files = getBibFiles();
 694         support::FileNameList::const_iterator it = files.begin();
 695         support::FileNameList::const_iterator en = files.end();
 696         for (; it != en; ++ it) {
 697                 ifdocstream ifs(it->toFilesystemEncoding().c_str(),
 698                         ios_base::in, buffer().params().encoding().iconvName());
 699
 700                 char_type ch;
 701                 VarMap strings;
 702
 703                 while (ifs) {
 704
 705                         ifs.get(ch);
 706                         if (!ifs)
 707                                 break;
 708
 709                         if (ch != '@')
 710                                 continue;
 711
 712                         docstring entryType;
 713
 714                         if (!readTypeOrKey(entryType, ifs, from_ascii("{("), docstring(), makeLowerCase)) {
 715                                 lyxerr << "BibTeX Parser: Error reading entry type." << std::endl;
 716                                 continue;
 717                         }
 718
 719                         if (!ifs) {
 720                                 lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 721                                 continue;
 722                         }
 723
 724                         if (entryType == from_ascii("comment")) {
 725                                 ifs.ignore(numeric_limits<int>::max(), '\n');
 726                                 continue;
 727                         }
 728
 729                         ifs.get(ch);
 730                         if (!ifs) {
 731                                 lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 732                                 break;
 733                         }
 734
 735                         if ((ch != '(') && (ch != '{')) {
 736                                 lyxerr << "BibTeX Parser: Invalid entry delimiter." << std::endl;
 737                                 ifs.putback(ch);
 738                                 continue;
 739                         }
 740
 741                         // process the entry
 742                         if (entryType == from_ascii("string")) {
 743
 744                                 // read string and add it to the strings map
 745                                 // (or replace it's old value)
 746                                 docstring name;
 747                                 docstring value;
 748
 749                                 if (!readTypeOrKey(name, ifs, from_ascii("="), from_ascii("#{}(),"), makeLowerCase)) {
 750                                         lyxerr << "BibTeX Parser: Error reading string name." << std::endl;
 751                                         continue;
 752                                 }
 753
 754                                 if (!ifs) {
 755                                         lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 756                                         continue;
 757                                 }
 758
 759                                 // next char must be an equal sign
 760                                 ifs.get(ch);
 761                                 if (!ifs || ch != '=') {
 762                                         lyxerr << "BibTeX Parser: No `=' after string name: " <<
 763                                                         name << "." << std::endl;
 764                                         continue;
 765                                 }
 766
 767                                 if (!readValue(value, ifs, strings)) {
 768                                         lyxerr << "BibTeX Parser: Unable to read value for string: " <<
 769                                                         name << "." << std::endl;
 770                                         continue;
 771                                 }
 772
 773                                 strings[name] = value;
 774
 775                         } else if (entryType == from_ascii("preamble")) {
 776
 777                                 // preamble definitions are discarded.
 778                                 // can they be of any use in lyx?
 779                                 docstring value;
 780
 781                                 if (!readValue(value, ifs, strings)) {
 782                                         lyxerr << "BibTeX Parser: Unable to read preamble value." << std::endl;
 783                                         continue;
 784                                 }
 785
 786                         } else {
 787
 788                                 // Citation entry. Try to read the key.
 789                                 docstring key;
 790
 791                                 if (!readTypeOrKey(key, ifs, from_ascii(","), from_ascii("}"), keepCase)) {
 792                                         lyxerr << "BibTeX Parser: Unable to read key for entry type:" <<
 793                                                         entryType << "." << std::endl;
 794                                         continue;
 795                                 }
 796
 797                                 if (!ifs) {
 798                                         lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 799                                         continue;
 800                                 }
 801
 802                                 /////////////////////////////////////////////
 803                                 // now we have a key, so we will add an entry
 804                                 // (even if it's empty, as bibtex does)
 805                                 //
 806                                 // we now read the field = value pairs.
 807                                 // all items must be separated by a comma. If
 808                                 // it is missing the scanning of this entry is
 809                                 // stopped and the next is searched.
 810                                 docstring name;
 811                                 docstring value;
 812                                 docstring data;
 813                                 BibTeXInfo keyvalmap(key, entryType);
 814
 815                                 bool readNext = removeWSAndComma(ifs);
 816
 817                                 while (ifs && readNext) {
 818
 819                                         // read field name
 820                                         if (!readTypeOrKey(name, ifs, from_ascii("="),
 821                                                            from_ascii("{}(),"), makeLowerCase) || !ifs)
 822                                                 break;
 823
 824                                         // next char must be an equal sign
 825                                         // FIXME Whitespace??
 826                                         ifs.get(ch);
 827                                         if (!ifs) {
 828                                                 lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 829                                                 break;
 830                                         }
 831                                         if (ch != '=') {
 832                                                 lyxerr << "BibTeX Parser: Missing `=' after field name: " <<
 833                                                                 name << ", for key: " << key << "." << std::endl;
 834                                                 ifs.putback(ch);
 835                                                 break;
 836                                         }
 837
 838                                         // read field value
 839                                         if (!readValue(value, ifs, strings)) {
 840                                                 lyxerr << "BibTeX Parser: Unable to read value for field: " <<
 841                                                                 name << ", for key: " << key << "." << std::endl;
 842                                                 break;
 843                                         }
 844
 845                                         keyvalmap[name] = value;
 846                                         data += "\n\n" + value;
 847                                         keylist.addFieldName(name);
 848                                         readNext = removeWSAndComma(ifs);
 849                                 }
 850
 851                                 // add the new entry
 852                                 keylist.addEntryType(entryType);
 853                                 keyvalmap.setAllData(data);
 854                                 keylist[key] = keyvalmap;
 855                         } //< else (citation entry)
 856                 } //< searching '@'
 857         } //< for loop over files
 858
 859         buffer().addBiblioInfo(keylist);
 860 }
 861
 862
 863 FileName InsetBibtex::getBibTeXPath(docstring const & filename, Buffer const & buf)
 864 {
 865         string texfile = changeExtension(to_utf8(filename), "bib");
 866         // note that, if the filename can be found directly from the path,
 867         // findtexfile will just return a FileName object for that path.
 868         FileName file(findtexfile(texfile, "bib"));
 869         if (file.empty())
 870                 file = FileName(makeAbsPath(texfile, buf.filePath()));
 871         return file;
 872 }
 873
 874
 875 bool InsetBibtex::addDatabase(docstring const & db)
 876 {
 877         docstring bibfiles = getParam("bibfiles");
 878         if (tokenPos(bibfiles, ',', db) != -1)
 879                 return false;
 880         if (!bibfiles.empty())
 881                 bibfiles += ',';
 882         setParam("bibfiles", bibfiles + db);
 883         return true;
 884 }
 885
 886
 887 bool InsetBibtex::delDatabase(docstring const & db)
 888 {
 889         docstring bibfiles = getParam("bibfiles");
 890         if (contains(bibfiles, db)) {
 891                 int const n = tokenPos(bibfiles, ',', db);
 892                 docstring bd = db;
 893                 if (n > 0) {
 894                         // this is not the first database
 895                         docstring tmp = ',' + bd;
 896                         setParam("bibfiles", subst(bibfiles, tmp, docstring()));
 897                 } else if (n == 0)
 898                         // this is the first (or only) database
 899                         setParam("bibfiles", split(bibfiles, bd, ','));
 900                 else
 901                         return false;
 902         }
 903         return true;
 904 }
 905
 906
 907 void InsetBibtex::validate(LaTeXFeatures & features) const
 908 {
 909         if (features.bufferParams().use_bibtopic)
 910                 features.require("bibtopic");
 911         // FIXME XHTML
 912         // It'd be better to be able to get this from an InsetLayout, but at present
 913         // InsetLayouts do not seem really to work for things that aren't InsetTexts.
 914         if (features.runparams().flavor == OutputParams::HTML)
 915                 features.addPreambleSnippet("<style type=\"text/css\">\n"
 916                         "div.bibtexentry { margin-left: 2em; text-indent: -2em; }\n"
 917                         "span.bibtexlabel:before{ content: \"[\"; }\n"
 918                         "span.bibtexlabel:after{ content: \"] \"; }\n"
 919                         "</style>");
 920 }
 921
 922
 923 // FIXME
 924 // docstring InsetBibtex::entriesAsXHTML(vector<docstring> const & entries)
 925 // And then here just: entriesAsXHTML(buffer().masterBibInfo().citedEntries())
 926 docstring InsetBibtex::xhtml(XHTMLStream & xs, OutputParams const &) const
 927 {
 928         BiblioInfo const & bibinfo = buffer().masterBibInfo();
 929         vector<docstring> const & cites = bibinfo.citedEntries();
 930         CiteEngine const engine = buffer().params().citeEngine();
 931         bool const numbers =
 932                 (engine == ENGINE_BASIC || engine == ENGINE_NATBIB_NUMERICAL);
 933
 934         docstring reflabel = from_ascii("References");
 935         Language const * l = buffer().params().language;
 936         if (l)
 937                 reflabel = translateIfPossible(reflabel, l->code());
 938
 939         xs << html::StartTag("h2", "class='bibtex'")
 940                 << reflabel
 941                 << html::EndTag("h2")
 942                 << html::StartTag("div", "class='bibtex'");
 943
 944         // Now we loop over the entries
 945         vector<docstring>::const_iterator vit = cites.begin();
 946         vector<docstring>::const_iterator const ven = cites.end();
 947         for (; vit != ven; ++vit) {
 948                 BiblioInfo::const_iterator const biit = bibinfo.find(*vit);
 949                 if (biit == bibinfo.end())
 950                         continue;
 951                 BibTeXInfo const & entry = biit->second;
 952                 xs << html::StartTag("div", "class='bibtexentry'");
 953                 // FIXME XHTML
 954                 // The same name/id problem we have elsewhere.
 955                 string const attr = "id='" + to_utf8(entry.key()) + "'";
 956                 xs << html::CompTag("a", attr);
 957                 docstring citekey;
 958                 if (numbers)
 959                         citekey = entry.citeNumber();
 960                 else {
 961                         docstring const auth = entry.getAbbreviatedAuthor();
 962                         // we do it this way so as to access the xref, if necessary
 963                         // note that this also gives us the modifier
 964                         docstring const year = bibinfo.getYear(*vit, true);
 965                         if (!auth.empty() && !year.empty())
 966                                 citekey = auth + ' ' + year;
 967                 }
 968                 if (citekey.empty()) {
 969                         citekey = entry.label();
 970                         if (citekey.empty())
 971                                 citekey = entry.key();
 972                 }
 973                 xs << html::StartTag("span", "class='bibtexlabel'")
 974                         << citekey
 975                         << html::EndTag("span");
 976                 // FIXME Right now, we are calling BibInfo::getInfo on the key,
 977                 // which will give us all the cross-referenced info. But for every
 978                 // entry, so there's a lot of repitition. This should be fixed.
 979                 xs << html::StartTag("span", "class='bibtexinfo'")
 980                         << XHTMLStream::ESCAPE_AND
 981                         << bibinfo.getInfo(entry.key(), buffer(), true)
 982                         << html::EndTag("span")
 983                         << html::EndTag("div");
 984                 xs.cr();
 985         }
 986         xs << html::EndTag("div");
 987         return docstring();
 988 }
 989
 990
 991 docstring InsetBibtex::contextMenuName() const
 992 {
 993         return from_ascii("context-bibtex");
 994 }
 995
 996
 997 } // namespace lyx