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                 setParams(p);
 108                 buffer().invalidateBibfileCache();
 109                 cur.forceBufferUpdate();
 110                 break;
 111         }
 112
 113         default:
 114                 InsetCommand::doDispatch(cur, cmd);
 115                 break;
 116         }
 117 }
 118
 119
 120 bool InsetBibtex::getStatus(Cursor & cur, FuncRequest const & cmd,
 121                 FuncStatus & flag) const
 122 {
 123         switch (cmd.action()) {
 124         case LFUN_INSET_EDIT:
 125                 flag.setEnabled(true);
 126                 return true;
 127
 128         default:
 129                 return InsetCommand::getStatus(cur, cmd, flag);
 130         }
 131 }
 132
 133
 134 void InsetBibtex::editDatabases() const
 135 {
 136         vector<docstring> bibfilelist = getVectorFromString(getParam("bibfiles"));
 137
 138         if (bibfilelist.empty())
 139                 return;
 140
 141         int nr_databases = bibfilelist.size();
 142         if (nr_databases > 1) {
 143                         docstring message = bformat(_("The BibTeX inset includes %1$s databases.\n"
 144                                                        "If you proceed, all of them will be opened."),
 145                                                         convert<docstring>(nr_databases));
 146                         int const ret = Alert::prompt(_("Open Databases?"),
 147                                 message, 0, 1, _("&Cancel"), _("&Proceed"));
 148
 149                         if (ret == 0)
 150                                 return;
 151         }
 152
 153         vector<docstring>::const_iterator it = bibfilelist.begin();
 154         vector<docstring>::const_iterator en = bibfilelist.end();
 155         for (; it != en; ++it) {
 156                 FileName const bibfile = getBibTeXPath(*it, buffer());
 157                 formats.edit(buffer(), bibfile,
 158                      formats.getFormatFromFile(bibfile));
 159         }
 160 }
 161
 162
 163 docstring InsetBibtex::screenLabel() const
 164 {
 165         return _("BibTeX Generated Bibliography");
 166 }
 167
 168
 169 docstring InsetBibtex::toolTip(BufferView const & /*bv*/, int /*x*/, int /*y*/) const
 170 {
 171         docstring item = from_ascii("* ");
 172         docstring tip = _("Databases:") + "\n";
 173         vector<docstring> bibfilelist = getVectorFromString(getParam("bibfiles"));
 174
 175         if (bibfilelist.empty()) {
 176                 tip += item;
 177                 tip += _("none");
 178         } else {
 179                 vector<docstring>::const_iterator it = bibfilelist.begin();
 180                 vector<docstring>::const_iterator en = bibfilelist.end();
 181                 for (; it != en; ++it) {
 182                         tip += item;
 183                         tip += *it + "\n";
 184                 }
 185         }
 186
 187         // Style-Options
 188         bool toc = false;
 189         docstring style = getParam("options"); // maybe empty! and with bibtotoc
 190         docstring bibtotoc = from_ascii("bibtotoc");
 191         if (prefixIs(style, bibtotoc)) {
 192                 toc = true;
 193                 if (contains(style, char_type(',')))
 194                         style = split(style, bibtotoc, char_type(','));
 195         }
 196
 197         tip += _("Style File:") +"\n";
 198         tip += item;
 199         if (!style.empty())
 200                 tip += style;
 201         else
 202                 tip += _("none");
 203
 204         tip += "\n" + _("Lists:") + " ";
 205         docstring btprint = getParam("btprint");
 206                 if (btprint == "btPrintAll")
 207                         tip += _("all references");
 208                 else if (btprint == "btPrintNotCited")
 209                         tip += _("all uncited references");
 210                 else
 211                         tip += _("all cited references");
 212
 213         if (toc) {
 214                 tip += ", ";
 215                 tip += _("included in TOC");
 216         }
 217
 218         return tip;
 219 }
 220
 221
 222 static string normalizeName(Buffer const & buffer,
 223         OutputParams const & runparams, string const & name, string const & ext)
 224 {
 225         string const fname = makeAbsPath(name, buffer.filePath()).absFileName();
 226         if (FileName::isAbsolute(name) || !FileName(fname + ext).isReadableFile())
 227                 return name;
 228         if (!runparams.nice)
 229                 return fname;
 230
 231         // FIXME UNICODE
 232         return to_utf8(makeRelPath(from_utf8(fname),
 233                                          from_utf8(buffer.masterBuffer()->filePath())));
 234 }
 235
 236
 237 int InsetBibtex::latex(odocstream & os, OutputParams const & runparams) const
 238 {
 239         // the sequence of the commands:
 240         // 1. \bibliographystyle{style}
 241         // 2. \addcontentsline{...} - if option bibtotoc set
 242         // 3. \bibliography{database}
 243         // and with bibtopic:
 244         // 1. \bibliographystyle{style}
 245         // 2. \begin{btSect}{database}
 246         // 3. \btPrint{Cited|NotCited|All}
 247         // 4. \end{btSect}
 248
 249         // Database(s)
 250         // If we are processing the LaTeX file in a temp directory then
 251         // copy the .bib databases to this temp directory, mangling their
 252         // names in the process. Store this mangled name in the list of
 253         // all databases.
 254         // (We need to do all this because BibTeX *really*, *really*
 255         // can't handle "files with spaces" and Windows users tend to
 256         // use such filenames.)
 257         // Otherwise, store the (maybe absolute) path to the original,
 258         // unmangled database name.
 259         vector<docstring> bibfilelist = getVectorFromString(getParam("bibfiles"));
 260         vector<docstring>::const_iterator it = bibfilelist.begin();
 261         vector<docstring>::const_iterator en = bibfilelist.end();
 262         odocstringstream dbs;
 263         bool didone = false;
 264
 265         for (; it != en; ++it) {
 266                 string utf8input = to_utf8(*it);
 267                 string database =
 268                         normalizeName(buffer(), runparams, utf8input, ".bib");
 269                 FileName const try_in_file =
 270                         makeAbsPath(database + ".bib", buffer().filePath());
 271                 bool const not_from_texmf = try_in_file.isReadableFile();
 272
 273                 if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
 274                     not_from_texmf) {
 275                         // mangledFileName() needs the extension
 276                         DocFileName const in_file = DocFileName(try_in_file);
 277                         database = removeExtension(in_file.mangledFileName());
 278                         FileName const out_file = makeAbsPath(database + ".bib",
 279                                         buffer().masterBuffer()->temppath());
 280
 281                         bool const success = in_file.copyTo(out_file);
 282                         if (!success) {
 283                                 lyxerr << "Failed to copy '" << in_file
 284                                        << "' to '" << out_file << "'"
 285                                        << endl;
 286                         }
 287                 } else if (!runparams.inComment && runparams.nice && not_from_texmf) {
 288                         if (!isValidLaTeXFileName(database)) {
 289                                 frontend::Alert::warning(_("Invalid filename"),
 290                                          _("The following filename will cause troubles "
 291                                                "when running the exported file through LaTeX: ") +
 292                                              from_utf8(database));
 293                         }
 294                         if (!isValidDVIFileName(database)) {
 295                                 frontend::Alert::warning(_("Problematic filename for DVI"),
 296                                          _("The following filename can cause troubles "
 297                                                "when running the exported file through LaTeX "
 298                                                    "and opening the resulting DVI: ") +
 299                                              from_utf8(database), true);
 300                         }
 301                 }
 302
 303                 if (didone)
 304                         dbs << ',';
 305                 else
 306                         didone = true;
 307                 // FIXME UNICODE
 308                 dbs << from_utf8(latex_path(database));
 309         }
 310         docstring const db_out = dbs.str();
 311
 312         // Post this warning only once.
 313         static bool warned_about_spaces = false;
 314         if (!warned_about_spaces &&
 315             runparams.nice && db_out.find(' ') != docstring::npos) {
 316                 warned_about_spaces = true;
 317                 Alert::warning(_("Export Warning!"),
 318                                _("There are spaces in the paths to your BibTeX databases.\n"
 319                                               "BibTeX will be unable to find them."));
 320         }
 321         // Style-Options
 322         string style = to_utf8(getParam("options")); // maybe empty! and with bibtotoc
 323         string bibtotoc;
 324         if (prefixIs(style, "bibtotoc")) {
 325                 bibtotoc = "bibtotoc";
 326                 if (contains(style, ','))
 327                         style = split(style, bibtotoc, ',');
 328         }
 329
 330         // line count
 331         int nlines = 0;
 332
 333         if (!style.empty()) {
 334                 string base = normalizeName(buffer(), runparams, style, ".bst");
 335                 FileName const try_in_file =
 336                         makeAbsPath(base + ".bst", buffer().filePath());
 337                 bool const not_from_texmf = try_in_file.isReadableFile();
 338                 // If this style does not come from texmf and we are not
 339                 // exporting to .tex copy it to the tmp directory.
 340                 // This prevents problems with spaces and 8bit charcaters
 341                 // in the file name.
 342                 if (!runparams.inComment && !runparams.dryrun && !runparams.nice &&
 343                     not_from_texmf) {
 344                         // use new style name
 345                         DocFileName const in_file = DocFileName(try_in_file);
 346                         base = removeExtension(in_file.mangledFileName());
 347                         FileName const out_file = makeAbsPath(base + ".bst",
 348                                         buffer().masterBuffer()->temppath());
 349                         bool const success = in_file.copyTo(out_file);
 350                         if (!success) {
 351                                 lyxerr << "Failed to copy '" << in_file
 352                                        << "' to '" << out_file << "'"
 353                                        << endl;
 354                         }
 355                 }
 356                 // FIXME UNICODE
 357                 os << "\\bibliographystyle{"
 358                    << from_utf8(latex_path(normalizeName(buffer(), runparams, base, ".bst")))
 359                    << "}\n";
 360                 nlines += 1;
 361         }
 362
 363         // Post this warning only once.
 364         static bool warned_about_bst_spaces = false;
 365         if (!warned_about_bst_spaces && runparams.nice && contains(style, ' ')) {
 366                 warned_about_bst_spaces = true;
 367                 Alert::warning(_("Export Warning!"),
 368                                _("There are spaces in the path to your BibTeX style file.\n"
 369                                               "BibTeX will be unable to find it."));
 370         }
 371
 372         if (!db_out.empty() && buffer().params().use_bibtopic) {
 373                 os << "\\begin{btSect}{" << db_out << "}\n";
 374                 docstring btprint = getParam("btprint");
 375                 if (btprint.empty())
 376                         // default
 377                         btprint = from_ascii("btPrintCited");
 378                 os << "\\" << btprint << "\n"
 379                    << "\\end{btSect}\n";
 380                 nlines += 3;
 381         }
 382
 383         // bibtotoc-Option
 384         if (!bibtotoc.empty() && !buffer().params().use_bibtopic) {
 385                 // set label for hyperref, see http://www.lyx.org/trac/ticket/6470
 386                 if (buffer().params().pdfoptions().use_hyperref)
 387                                 os << "\\phantomsection";
 388                 if (buffer().params().documentClass().hasLaTeXLayout("chapter"))
 389                         os << "\\addcontentsline{toc}{chapter}{\\bibname}";
 390                 else if (buffer().params().documentClass().hasLaTeXLayout("section"))
 391                         os << "\\addcontentsline{toc}{section}{\\refname}";
 392         }
 393
 394         if (!db_out.empty() && !buffer().params().use_bibtopic) {
 395                 docstring btprint = getParam("btprint");
 396                 if (btprint == "btPrintAll") {
 397                         os << "\\nocite{*}\n";
 398                         nlines += 1;
 399                 }
 400                 os << "\\bibliography{" << db_out << "}\n";
 401                 nlines += 1;
 402         }
 403
 404         return nlines;
 405 }
 406
 407
 408 support::FileNameList InsetBibtex::getBibFiles() const
 409 {
 410         FileName path(buffer().filePath());
 411         support::PathChanger p(path);
 412
 413         support::FileNameList vec;
 414
 415         vector<docstring> bibfilelist = getVectorFromString(getParam("bibfiles"));
 416         vector<docstring>::const_iterator it = bibfilelist.begin();
 417         vector<docstring>::const_iterator en = bibfilelist.end();
 418         for (; it != en; ++it) {
 419                 FileName const file = getBibTeXPath(*it, buffer());
 420
 421                 if (!file.empty())
 422                         vec.push_back(file);
 423                 else
 424                         LYXERR0("Couldn't find " + to_utf8(*it) + " in InsetBibtex::getBibFiles()!");
 425         }
 426
 427         return vec;
 428
 429 }
 430
 431 namespace {
 432
 433         // methods for parsing bibtex files
 434
 435         typedef map<docstring, docstring> VarMap;
 436
 437         /// remove whitespace characters, optionally a single comma,
 438         /// and further whitespace characters from the stream.
 439         /// @return true if a comma was found, false otherwise
 440         ///
 441         bool removeWSAndComma(ifdocstream & ifs) {
 442                 char_type ch;
 443
 444                 if (!ifs)
 445                         return false;
 446
 447                 // skip whitespace
 448                 do {
 449                         ifs.get(ch);
 450                 } while (ifs && isSpace(ch));
 451
 452                 if (!ifs)
 453                         return false;
 454
 455                 if (ch != ',') {
 456                         ifs.putback(ch);
 457                         return false;
 458                 }
 459
 460                 // skip whitespace
 461                 do {
 462                         ifs.get(ch);
 463                 } while (ifs && isSpace(ch));
 464
 465                 if (ifs) {
 466                         ifs.putback(ch);
 467                 }
 468
 469                 return true;
 470         }
 471
 472
 473         enum charCase {
 474                 makeLowerCase,
 475                 keepCase
 476         };
 477
 478         /// remove whitespace characters, read characer sequence
 479         /// not containing whitespace characters or characters in
 480         /// delimChars, and remove further whitespace characters.
 481         ///
 482         /// @return true if a string of length > 0 could be read.
 483         ///
 484         bool readTypeOrKey(docstring & val, ifdocstream & ifs,
 485                 docstring const & delimChars, docstring const & illegalChars,
 486                 charCase chCase) {
 487
 488                 char_type ch;
 489
 490                 val.clear();
 491
 492                 if (!ifs)
 493                         return false;
 494
 495                 // skip whitespace
 496                 do {
 497                         ifs.get(ch);
 498                 } while (ifs && isSpace(ch));
 499
 500                 if (!ifs)
 501                         return false;
 502
 503                 // read value
 504                 bool legalChar = true;
 505                 while (ifs && !isSpace(ch) &&
 506                                                  delimChars.find(ch) == docstring::npos &&
 507                                                  (legalChar = (illegalChars.find(ch) == docstring::npos))
 508                                         )
 509                 {
 510                         if (chCase == makeLowerCase)
 511                                 val += lowercase(ch);
 512                         else
 513                                 val += ch;
 514                         ifs.get(ch);
 515                 }
 516
 517                 if (!legalChar) {
 518                         ifs.putback(ch);
 519                         return false;
 520                 }
 521
 522                 // skip whitespace
 523                 while (ifs && isSpace(ch)) {
 524                         ifs.get(ch);
 525                 }
 526
 527                 if (ifs) {
 528                         ifs.putback(ch);
 529                 }
 530
 531                 return val.length() > 0;
 532         }
 533
 534         /// read subsequent bibtex values that are delimited with a #-character.
 535         /// Concatenate all parts and replace names with the associated string in
 536         /// the variable strings.
 537         /// @return true if reading was successfull (all single parts were delimited
 538         /// correctly)
 539         bool readValue(docstring & val, ifdocstream & ifs, const VarMap & strings) {
 540
 541                 char_type ch;
 542
 543                 val.clear();
 544
 545                 if (!ifs)
 546                         return false;
 547
 548                 do {
 549                         // skip whitespace
 550                         do {
 551                                 ifs.get(ch);
 552                         } while (ifs && isSpace(ch));
 553
 554                         if (!ifs)
 555                                 return false;
 556
 557                         // check for field type
 558                         if (isDigit(ch)) {
 559
 560                                 // read integer value
 561                                 do {
 562                                         val += ch;
 563                                         ifs.get(ch);
 564                                 } while (ifs && isDigit(ch));
 565
 566                                 if (!ifs)
 567                                         return false;
 568
 569                         } else if (ch == '"' || ch == '{') {
 570                                 // set end delimiter
 571                                 char_type delim = ch == '"' ? '"': '}';
 572
 573                                 // Skip whitespace
 574                                 do {
 575                                         ifs.get(ch);
 576                                 } while (ifs && isSpace(ch));
 577
 578                                 if (!ifs)
 579                                         return false;
 580
 581                                 // We now have the first non-whitespace character
 582                                 // We'll collapse adjacent whitespace.
 583                                 bool lastWasWhiteSpace = false;
 584
 585                                 // inside this delimited text braces must match.
 586                                 // Thus we can have a closing delimiter only
 587                                 // when nestLevel == 0
 588                                 int nestLevel = 0;
 589
 590                                 while (ifs && (nestLevel > 0 || ch != delim)) {
 591                                         if (isSpace(ch)) {
 592                                                 lastWasWhiteSpace = true;
 593                                                 ifs.get(ch);
 594                                                 continue;
 595                                         }
 596                                         // We output the space only after we stop getting
 597                                         // whitespace so as not to output any whitespace
 598                                         // at the end of the value.
 599                                         if (lastWasWhiteSpace) {
 600                                                 lastWasWhiteSpace = false;
 601                                                 val += ' ';
 602                                         }
 603
 604                                         val += ch;
 605
 606                                         // update nesting level
 607                                         switch (ch) {
 608                                                 case '{':
 609                                                         ++nestLevel;
 610                                                         break;
 611                                                 case '}':
 612                                                         --nestLevel;
 613                                                         if (nestLevel < 0)
 614                                                                 return false;
 615                                                         break;
 616                                         }
 617
 618                                         if (ifs)
 619                                                 ifs.get(ch);
 620                                 }
 621
 622                                 if (!ifs)
 623                                         return false;
 624
 625                                 // FIXME Why is this here?
 626                                 ifs.get(ch);
 627
 628                                 if (!ifs)
 629                                         return false;
 630
 631                         } else {
 632
 633                                 // reading a string name
 634                                 docstring strName;
 635
 636                                 while (ifs && !isSpace(ch) && ch != '#' && ch != ',' && ch != '}' && ch != ')') {
 637                                         strName += lowercase(ch);
 638                                         ifs.get(ch);
 639                                 }
 640
 641                                 if (!ifs)
 642                                         return false;
 643
 644                                 // replace the string with its assigned value or
 645                                 // discard it if it's not assigned
 646                                 if (strName.length()) {
 647                                         VarMap::const_iterator pos = strings.find(strName);
 648                                         if (pos != strings.end()) {
 649                                                 val += pos->second;
 650                                         }
 651                                 }
 652                         }
 653
 654                         // skip WS
 655                         while (ifs && isSpace(ch)) {
 656                                 ifs.get(ch);
 657                         }
 658
 659                         if (!ifs)
 660                                 return false;
 661
 662                         // continue reading next value on concatenate with '#'
 663                 } while (ch == '#');
 664
 665                 ifs.putback(ch);
 666
 667                 return true;
 668         }
 669 }
 670
 671
 672 void InsetBibtex::collectBibKeys(InsetIterator const & /*di*/) const
 673 {
 674         parseBibTeXFiles();
 675 }
 676
 677
 678 void InsetBibtex::parseBibTeXFiles() const
 679 {
 680         // This bibtex parser is a first step to parse bibtex files
 681         // more precisely.
 682         //
 683         // - it reads the whole bibtex entry and does a syntax check
 684         //   (matching delimiters, missing commas,...
 685         // - it recovers from errors starting with the next @-character
 686         // - it reads @string definitions and replaces them in the
 687         //   field values.
 688         // - it accepts more characters in keys or value names than
 689         //   bibtex does.
 690         //
 691         // Officially bibtex does only support ASCII, but in practice
 692         // you can use the encoding of the main document as long as
 693         // some elements like keys and names are pure ASCII. Therefore
 694         // we convert the file from the buffer encoding.
 695         // We don't restrict keys to ASCII in LyX, since our own
 696         // InsetBibitem can generate non-ASCII keys, and nonstandard
 697         // 8bit clean bibtex forks exist.
 698
 699         BiblioInfo keylist;
 700
 701         support::FileNameList const files = getBibFiles();
 702         support::FileNameList::const_iterator it = files.begin();
 703         support::FileNameList::const_iterator en = files.end();
 704         for (; it != en; ++ it) {
 705                 ifdocstream ifs(it->toFilesystemEncoding().c_str(),
 706                         ios_base::in, buffer().params().encoding().iconvName());
 707
 708                 char_type ch;
 709                 VarMap strings;
 710
 711                 while (ifs) {
 712
 713                         ifs.get(ch);
 714                         if (!ifs)
 715                                 break;
 716
 717                         if (ch != '@')
 718                                 continue;
 719
 720                         docstring entryType;
 721
 722                         if (!readTypeOrKey(entryType, ifs, from_ascii("{("), docstring(), makeLowerCase)) {
 723                                 lyxerr << "BibTeX Parser: Error reading entry type." << std::endl;
 724                                 continue;
 725                         }
 726
 727                         if (!ifs) {
 728                                 lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 729                                 continue;
 730                         }
 731
 732                         if (entryType == from_ascii("comment")) {
 733                                 ifs.ignore(numeric_limits<int>::max(), '\n');
 734                                 continue;
 735                         }
 736
 737                         ifs.get(ch);
 738                         if (!ifs) {
 739                                 lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 740                                 break;
 741                         }
 742
 743                         if ((ch != '(') && (ch != '{')) {
 744                                 lyxerr << "BibTeX Parser: Invalid entry delimiter." << std::endl;
 745                                 ifs.putback(ch);
 746                                 continue;
 747                         }
 748
 749                         // process the entry
 750                         if (entryType == from_ascii("string")) {
 751
 752                                 // read string and add it to the strings map
 753                                 // (or replace it's old value)
 754                                 docstring name;
 755                                 docstring value;
 756
 757                                 if (!readTypeOrKey(name, ifs, from_ascii("="), from_ascii("#{}(),"), makeLowerCase)) {
 758                                         lyxerr << "BibTeX Parser: Error reading string name." << std::endl;
 759                                         continue;
 760                                 }
 761
 762                                 if (!ifs) {
 763                                         lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 764                                         continue;
 765                                 }
 766
 767                                 // next char must be an equal sign
 768                                 ifs.get(ch);
 769                                 if (!ifs || ch != '=') {
 770                                         lyxerr << "BibTeX Parser: No `=' after string name: " <<
 771                                                         name << "." << std::endl;
 772                                         continue;
 773                                 }
 774
 775                                 if (!readValue(value, ifs, strings)) {
 776                                         lyxerr << "BibTeX Parser: Unable to read value for string: " <<
 777                                                         name << "." << std::endl;
 778                                         continue;
 779                                 }
 780
 781                                 strings[name] = value;
 782
 783                         } else if (entryType == from_ascii("preamble")) {
 784
 785                                 // preamble definitions are discarded.
 786                                 // can they be of any use in lyx?
 787                                 docstring value;
 788
 789                                 if (!readValue(value, ifs, strings)) {
 790                                         lyxerr << "BibTeX Parser: Unable to read preamble value." << std::endl;
 791                                         continue;
 792                                 }
 793
 794                         } else {
 795
 796                                 // Citation entry. Try to read the key.
 797                                 docstring key;
 798
 799                                 if (!readTypeOrKey(key, ifs, from_ascii(","), from_ascii("}"), keepCase)) {
 800                                         lyxerr << "BibTeX Parser: Unable to read key for entry type:" <<
 801                                                         entryType << "." << std::endl;
 802                                         continue;
 803                                 }
 804
 805                                 if (!ifs) {
 806                                         lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 807                                         continue;
 808                                 }
 809
 810                                 /////////////////////////////////////////////
 811                                 // now we have a key, so we will add an entry
 812                                 // (even if it's empty, as bibtex does)
 813                                 //
 814                                 // we now read the field = value pairs.
 815                                 // all items must be separated by a comma. If
 816                                 // it is missing the scanning of this entry is
 817                                 // stopped and the next is searched.
 818                                 docstring name;
 819                                 docstring value;
 820                                 docstring data;
 821                                 BibTeXInfo keyvalmap(key, entryType);
 822
 823                                 bool readNext = removeWSAndComma(ifs);
 824
 825                                 while (ifs && readNext) {
 826
 827                                         // read field name
 828                                         if (!readTypeOrKey(name, ifs, from_ascii("="),
 829                                                            from_ascii("{}(),"), makeLowerCase) || !ifs)
 830                                                 break;
 831
 832                                         // next char must be an equal sign
 833                                         // FIXME Whitespace??
 834                                         ifs.get(ch);
 835                                         if (!ifs) {
 836                                                 lyxerr << "BibTeX Parser: Unexpected end of file." << std::endl;
 837                                                 break;
 838                                         }
 839                                         if (ch != '=') {
 840                                                 lyxerr << "BibTeX Parser: Missing `=' after field name: " <<
 841                                                                 name << ", for key: " << key << "." << std::endl;
 842                                                 ifs.putback(ch);
 843                                                 break;
 844                                         }
 845
 846                                         // read field value
 847                                         if (!readValue(value, ifs, strings)) {
 848                                                 lyxerr << "BibTeX Parser: Unable to read value for field: " <<
 849                                                                 name << ", for key: " << key << "." << std::endl;
 850                                                 break;
 851                                         }
 852
 853                                         keyvalmap[name] = value;
 854                                         data += "\n\n" + value;
 855                                         keylist.addFieldName(name);
 856                                         readNext = removeWSAndComma(ifs);
 857                                 }
 858
 859                                 // add the new entry
 860                                 keylist.addEntryType(entryType);
 861                                 keyvalmap.setAllData(data);
 862                                 keylist[key] = keyvalmap;
 863                         } //< else (citation entry)
 864                 } //< searching '@'
 865         } //< for loop over files
 866
 867         buffer().addBiblioInfo(keylist);
 868 }
 869
 870
 871 FileName InsetBibtex::getBibTeXPath(docstring const & filename, Buffer const & buf)
 872 {
 873         string texfile = changeExtension(to_utf8(filename), "bib");
 874         // note that, if the filename can be found directly from the path,
 875         // findtexfile will just return a FileName object for that path.
 876         FileName file(findtexfile(texfile, "bib"));
 877         if (file.empty())
 878                 file = FileName(makeAbsPath(texfile, buf.filePath()));
 879         return file;
 880 }
 881
 882
 883 bool InsetBibtex::addDatabase(docstring const & db)
 884 {
 885         docstring bibfiles = getParam("bibfiles");
 886         if (tokenPos(bibfiles, ',', db) != -1)
 887                 return false;
 888         if (!bibfiles.empty())
 889                 bibfiles += ',';
 890         setParam("bibfiles", bibfiles + db);
 891         return true;
 892 }
 893
 894
 895 bool InsetBibtex::delDatabase(docstring const & db)
 896 {
 897         docstring bibfiles = getParam("bibfiles");
 898         if (contains(bibfiles, db)) {
 899                 int const n = tokenPos(bibfiles, ',', db);
 900                 docstring bd = db;
 901                 if (n > 0) {
 902                         // this is not the first database
 903                         docstring tmp = ',' + bd;
 904                         setParam("bibfiles", subst(bibfiles, tmp, docstring()));
 905                 } else if (n == 0)
 906                         // this is the first (or only) database
 907                         setParam("bibfiles", split(bibfiles, bd, ','));
 908                 else
 909                         return false;
 910         }
 911         return true;
 912 }
 913
 914
 915 void InsetBibtex::validate(LaTeXFeatures & features) const
 916 {
 917         if (features.bufferParams().use_bibtopic)
 918                 features.require("bibtopic");
 919         // FIXME XHTML
 920         // It'd be better to be able to get this from an InsetLayout, but at present
 921         // InsetLayouts do not seem really to work for things that aren't InsetTexts.
 922         if (features.runparams().flavor == OutputParams::HTML)
 923                 features.addPreambleSnippet("<style type=\"text/css\">\n"
 924                         "div.bibtexentry { margin-left: 2em; text-indent: -2em; }\n"
 925                         "span.bibtexlabel:before{ content: \"[\"; }\n"
 926                         "span.bibtexlabel:after{ content: \"] \"; }\n"
 927                         "</style>");
 928 }
 929
 930
 931 // FIXME
 932 // docstring InsetBibtex::entriesAsXHTML(vector<docstring> const & entries)
 933 // And then here just: entriesAsXHTML(buffer().masterBibInfo().citedEntries())
 934 docstring InsetBibtex::xhtml(XHTMLStream & xs, OutputParams const &) const
 935 {
 936         BiblioInfo const & bibinfo = buffer().masterBibInfo();
 937         vector<docstring> const & cites = bibinfo.citedEntries();
 938         CiteEngine const engine = buffer().params().citeEngine();
 939         bool const numbers =
 940                 (engine == ENGINE_BASIC || engine == ENGINE_NATBIB_NUMERICAL);
 941
 942         docstring reflabel = from_ascii("References");
 943         Language const * l = buffer().params().language;
 944         if (l)
 945                 reflabel = translateIfPossible(reflabel, l->code());
 946
 947         xs << html::StartTag("h2", "class='bibtex'")
 948                 << reflabel
 949                 << html::EndTag("h2")
 950                 << html::StartTag("div", "class='bibtex'");
 951
 952         // Now we loop over the entries
 953         vector<docstring>::const_iterator vit = cites.begin();
 954         vector<docstring>::const_iterator const ven = cites.end();
 955         for (; vit != ven; ++vit) {
 956                 BiblioInfo::const_iterator const biit = bibinfo.find(*vit);
 957                 if (biit == bibinfo.end())
 958                         continue;
 959                 BibTeXInfo const & entry = biit->second;
 960                 xs << html::StartTag("div", "class='bibtexentry'");
 961                 // FIXME XHTML
 962                 // The same name/id problem we have elsewhere.
 963                 string const attr = "id='" + to_utf8(entry.key()) + "'";
 964                 xs << html::CompTag("a", attr);
 965                 docstring citekey;
 966                 if (numbers)
 967                         citekey = entry.citeNumber();
 968                 else {
 969                         docstring const auth = entry.getAbbreviatedAuthor();
 970                         // we do it this way so as to access the xref, if necessary
 971                         // note that this also gives us the modifier
 972                         docstring const year = bibinfo.getYear(*vit, true);
 973                         if (!auth.empty() && !year.empty())
 974                                 citekey = auth + ' ' + year;
 975                 }
 976                 if (citekey.empty()) {
 977                         citekey = entry.label();
 978                         if (citekey.empty())
 979                                 citekey = entry.key();
 980                 }
 981                 xs << html::StartTag("span", "class='bibtexlabel'")
 982                         << citekey
 983                         << html::EndTag("span");
 984                 // FIXME Right now, we are calling BibInfo::getInfo on the key,
 985                 // which will give us all the cross-referenced info. But for every
 986                 // entry, so there's a lot of repitition. This should be fixed.
 987                 xs << html::StartTag("span", "class='bibtexinfo'")
 988                         << XHTMLStream::ESCAPE_AND
 989                         << bibinfo.getInfo(entry.key(), buffer(), true)
 990                         << html::EndTag("span")
 991                         << html::EndTag("div");
 992                 xs.cr();
 993         }
 994         xs << html::EndTag("div");
 995         return docstring();
 996 }
 997
 998
 999 docstring InsetBibtex::contextMenuName() const
1000 {
1001         return from_ascii("context-bibtex");
1002 }
1003
1004
1005 } // namespace lyx