src/insets/InsetIndex.cpp

   1 /**
   2  * \file InsetIndex.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Jürgen Spitzmüller
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11 #include <config.h>
  12
  13 #include "InsetIndex.h"
  14
  15 #include "Buffer.h"
  16 #include "BufferParams.h"
  17 #include "BufferView.h"
  18 #include "ColorSet.h"
  19 #include "DispatchResult.h"
  20 #include "Encoding.h"
  21 #include "FuncRequest.h"
  22 #include "FuncStatus.h"
  23 #include "IndicesList.h"
  24 #include "LaTeXFeatures.h"
  25 #include "Lexer.h"
  26 #include "output_latex.h"
  27 #include "output_xhtml.h"
  28 #include "sgml.h"
  29 #include "TocBackend.h"
  30
  31 #include "support/debug.h"
  32 #include "support/docstream.h"
  33 #include "support/gettext.h"
  34 #include "support/lstrings.h"
  35
  36 #include "frontends/alert.h"
  37
  38 #include <ostream>
  39
  40 using namespace std;
  41 using namespace lyx::support;
  42
  43 namespace lyx {
  44
  45 /////////////////////////////////////////////////////////////////////
  46 //
  47 // InsetIndex
  48 //
  49 ///////////////////////////////////////////////////////////////////////
  50
  51
  52 InsetIndex::InsetIndex(Buffer * buf, InsetIndexParams const & params)
  53         : InsetCollapsable(buf), params_(params)
  54 {}
  55
  56
  57 int InsetIndex::latex(odocstream & os,
  58                       OutputParams const & runparams_in) const
  59 {
  60         OutputParams runparams(runparams_in);
  61         runparams.inIndexEntry = true;
  62
  63         if (buffer().masterBuffer()->params().use_indices && !params_.index.empty()
  64             && params_.index != "idx") {
  65                 os << "\\sindex[";
  66                 os << params_.index;
  67                 os << "]{";
  68         } else {
  69                 os << "\\index";
  70                 os << '{';
  71         }
  72         int i = 0;
  73
  74         // get contents of InsetText as LaTeX and plaintext
  75         odocstringstream ourlatex;
  76         InsetText::latex(ourlatex, runparams);
  77         odocstringstream ourplain;
  78         InsetText::plaintext(ourplain, runparams);
  79         docstring latexstr = ourlatex.str();
  80         docstring plainstr = ourplain.str();
  81
  82         // this will get what follows | if anything does
  83         docstring cmd;
  84
  85         // check for the | separator
  86         // FIXME This would go wrong on an escaped "|", but
  87         // how far do we want to go here?
  88         size_t pos = latexstr.find(from_ascii("|"));
  89         if (pos != docstring::npos) {
  90                 // put the bit after "|" into cmd...
  91                 cmd = latexstr.substr(pos + 1);
  92                 // ...and erase that stuff from latexstr
  93                 latexstr = latexstr.erase(pos);
  94                 // ...and similarly from plainstr
  95                 size_t ppos = plainstr.find(from_ascii("|"));
  96                 if (ppos < plainstr.size())
  97                         plainstr.erase(ppos);
  98                 else
  99                         LYXERR0("The `|' separator was not found in the plaintext version!");
 100         }
 101
 102         // Separate the entires and subentries, i.e., split on "!"
 103         // FIXME This would do the wrong thing with escaped ! characters
 104         std::vector<docstring> const levels =
 105                 getVectorFromString(latexstr, from_ascii("!"), true);
 106         std::vector<docstring> const levels_plain =
 107                 getVectorFromString(plainstr, from_ascii("!"), true);
 108
 109         vector<docstring>::const_iterator it = levels.begin();
 110         vector<docstring>::const_iterator end = levels.end();
 111         vector<docstring>::const_iterator it2 = levels_plain.begin();
 112         bool first = true;
 113         for (; it != end; ++it) {
 114                 // write the separator except the first time
 115                 if (!first)
 116                         os << '!';
 117                 else
 118                         first = false;
 119
 120                 // correctly sort macros and formatted strings
 121                 // if we do find a command, prepend a plain text
 122                 // version of the content to get sorting right,
 123                 // e.g. \index{LyX@\LyX}, \index{text@\textbf{text}}
 124                 // Don't do that if the user entered '@' himself, though.
 125                 if (contains(*it, '\\') && !contains(*it, '@')) {
 126                         // Plaintext might return nothing (e.g. for ERTs)
 127                         docstring const spart =
 128                                 (it2 < levels_plain.end() && !(*it2).empty())
 129                                 ? *it2 : *it;
 130                         // Now we need to validate that all characters in
 131                         // the sorting part are representable in the current
 132                         // encoding. If not try the LaTeX macro which might
 133                         // or might not be a good choice, and issue a warning.
 134                         docstring spart2;
 135                         for (size_t n = 0; n < spart.size(); ++n) {
 136                                 try {
 137                                         spart2 += runparams.encoding->latexChar(spart[n]);
 138                                 } catch (EncodingException & /* e */) {
 139                                         LYXERR0("Uncodable character in index entry. Sorting might be wrong!");
 140                                 }
 141                         }
 142                         if (spart != spart2 && !runparams.dryrun) {
 143                                 // FIXME: warning should be passed to the error dialog
 144                                 frontend::Alert::warning(_("Index sorting failed"),
 145                                 bformat(_("LyX's automatic index sorting algorithm faced\n"
 146                                   "problems with the entry '%1$s'.\n"
 147                                   "Please specify the sorting of this entry manually, as\n"
 148                                   "explained in the User Guide."), spart));
 149                         }
 150                         // remove remaining \'s for the sorting part
 151                         docstring const ppart =
 152                                 subst(spart2, from_ascii("\\"), docstring());
 153                         os << ppart;
 154                         os << '@';
 155                 }
 156                 docstring const tpart = *it;
 157                 os << tpart;
 158                 if (it2 < levels_plain.end())
 159                         ++it2;
 160         }
 161         // write the bit that followed "|"
 162         if (!cmd.empty())
 163                 os << "|" << cmd;
 164         os << '}';
 165         return i;
 166 }
 167
 168
 169 int InsetIndex::docbook(odocstream & os, OutputParams const & runparams) const
 170 {
 171         os << "<indexterm><primary>";
 172         int const i = InsetText::docbook(os, runparams);
 173         os << "</primary></indexterm>";
 174         return i;
 175 }
 176
 177
 178 docstring InsetIndex::xhtml(XHTMLStream & xs, OutputParams const &) const
 179 {
 180         // we just print an anchor, taking the paragraph ID from
 181         // our own interior paragraph, which doesn't get printed
 182         std::string const magic = paragraphs().front().magicLabel();
 183         std::string const attr = "id='" + magic + "'";
 184         xs << html::CompTag("a", attr);
 185         return docstring();
 186 }
 187
 188
 189 bool InsetIndex::showInsetDialog(BufferView * bv) const
 190 {
 191         bv->showDialog("index", params2string(params_),
 192                         const_cast<InsetIndex *>(this));
 193         return true;
 194 }
 195
 196
 197 void InsetIndex::doDispatch(Cursor & cur, FuncRequest & cmd)
 198 {
 199         switch (cmd.action_) {
 200
 201         case LFUN_INSET_MODIFY: {
 202                 if (cmd.getArg(0) == "changetype") {
 203                         params_.index = from_utf8(cmd.getArg(1));
 204                         break;
 205                 }
 206                 InsetIndexParams params;
 207                 InsetIndex::string2params(to_utf8(cmd.argument()), params);
 208                 params_.index = params.index;
 209                 break;
 210         }
 211
 212         case LFUN_INSET_DIALOG_UPDATE:
 213                 cur.bv().updateDialog("index", params2string(params_));
 214                 break;
 215
 216         default:
 217                 InsetCollapsable::doDispatch(cur, cmd);
 218                 break;
 219         }
 220 }
 221
 222
 223 bool InsetIndex::getStatus(Cursor & cur, FuncRequest const & cmd,
 224                 FuncStatus & flag) const
 225 {
 226         switch (cmd.action_) {
 227
 228         case LFUN_INSET_MODIFY:
 229                 if (cmd.getArg(0) == "changetype") {
 230                         docstring const newtype = from_utf8(cmd.getArg(1));
 231                         Buffer const & realbuffer = *buffer().masterBuffer();
 232                         IndicesList const & indiceslist = realbuffer.params().indiceslist();
 233                         Index const * index = indiceslist.findShortcut(newtype);
 234                         flag.setEnabled(index != 0);
 235                         flag.setOnOff(
 236                                 from_utf8(cmd.getArg(1)) == params_.index);
 237                         return true;
 238                 }
 239                 flag.setEnabled(true);
 240                 return true;
 241
 242         case LFUN_INSET_DIALOG_UPDATE: {
 243                 Buffer const & realbuffer = *buffer().masterBuffer();
 244                 flag.setEnabled(realbuffer.params().use_indices);
 245                 return true;
 246         }
 247
 248         default:
 249                 return InsetCollapsable::getStatus(cur, cmd, flag);
 250         }
 251 }
 252
 253
 254 ColorCode InsetIndex::labelColor() const
 255 {
 256         if (params_.index.empty() || params_.index == from_ascii("idx"))
 257                 return InsetCollapsable::labelColor();
 258         // FIXME UNICODE
 259         ColorCode c = lcolor.getFromLyXName(to_utf8(params_.index));
 260         if (c == Color_none)
 261                 c = InsetCollapsable::labelColor();
 262         return c;
 263 }
 264
 265
 266 docstring InsetIndex::toolTip(BufferView const &, int, int) const
 267 {
 268         docstring tip = _("Index Entry");
 269         if (buffer().params().use_indices && !params_.index.empty()) {
 270                 Buffer const & realbuffer = *buffer().masterBuffer();
 271                 IndicesList const & indiceslist = realbuffer.params().indiceslist();
 272                 tip += " (";
 273                 Index const * index = indiceslist.findShortcut(params_.index);
 274                 if (!index)
 275                         tip += _("unknown type!");
 276                 else
 277                         tip += index->index();
 278                 tip += ")";
 279         }
 280         tip += ": ";
 281         OutputParams rp(&buffer().params().encoding());
 282         odocstringstream ods;
 283         InsetText::plaintext(ods, rp);
 284         tip += ods.str();
 285         return wrapParas(tip);
 286 }
 287
 288
 289 docstring const InsetIndex::buttonLabel(BufferView const & bv) const
 290 {
 291         InsetLayout const & il = getLayout();
 292         docstring label = translateIfPossible(il.labelstring());
 293
 294         if (buffer().params().use_indices && !params_.index.empty()) {
 295                 Buffer const & realbuffer = *buffer().masterBuffer();
 296                 IndicesList const & indiceslist = realbuffer.params().indiceslist();
 297                 label += " (";
 298                 Index const * index = indiceslist.findShortcut(params_.index);
 299                 if (!index)
 300                         label += _("unknown type!");
 301                 else
 302                         label += index->index();
 303                 label += ")";
 304         }
 305
 306         if (!il.contentaslabel() || geometry(bv) != ButtonOnly)
 307                 return label;
 308         return getNewLabel(label);
 309 }
 310
 311
 312 void InsetIndex::write(ostream & os) const
 313 {
 314         os << to_utf8(name());
 315         params_.write(os);
 316         InsetCollapsable::write(os);
 317 }
 318
 319
 320 void InsetIndex::read(Lexer & lex)
 321 {
 322         params_.read(lex);
 323         InsetCollapsable::read(lex);
 324 }
 325
 326
 327 string InsetIndex::params2string(InsetIndexParams const & params)
 328 {
 329         ostringstream data;
 330         data << "index";
 331         params.write(data);
 332         return data.str();
 333 }
 334
 335
 336 void InsetIndex::string2params(string const & in, InsetIndexParams & params)
 337 {
 338         params = InsetIndexParams();
 339         if (in.empty())
 340                 return;
 341
 342         istringstream data(in);
 343         Lexer lex;
 344         lex.setStream(data);
 345         lex.setContext("InsetIndex::string2params");
 346         lex >> "index";
 347         params.read(lex);
 348 }
 349
 350
 351 void InsetIndex::addToToc(DocIterator const & cpit)
 352 {
 353         DocIterator pit = cpit;
 354         pit.push_back(CursorSlice(*this));
 355         docstring const item = text().asString(0, 1, AS_STR_LABEL | AS_STR_INSETS);
 356         buffer().tocBackend().toc("index").push_back(TocItem(pit, 0, item));
 357         // Proceed with the rest of the inset.
 358         InsetCollapsable::addToToc(cpit);
 359 }
 360
 361
 362 void InsetIndex::validate(LaTeXFeatures & features) const
 363 {
 364         if (buffer().masterBuffer()->params().use_indices
 365             && !params_.index.empty()
 366             && params_.index != "idx")
 367                 features.require("splitidx");
 368 }
 369
 370
 371 docstring InsetIndex::contextMenu(BufferView const &, int, int) const
 372 {
 373         return from_ascii("context-index");
 374 }
 375
 376
 377 bool InsetIndex::hasSettings() const
 378 {
 379         return buffer().masterBuffer()->params().use_indices;
 380 }
 381
 382
 383
 384
 385 /////////////////////////////////////////////////////////////////////
 386 //
 387 // InsetIndexParams
 388 //
 389 ///////////////////////////////////////////////////////////////////////
 390
 391
 392 void InsetIndexParams::write(ostream & os) const
 393 {
 394         os << ' ';
 395         if (!index.empty())
 396                 os << to_utf8(index);
 397         else
 398                 os << "idx";
 399         os << '\n';
 400 }
 401
 402
 403 void InsetIndexParams::read(Lexer & lex)
 404 {
 405         if (lex.eatLine())
 406                 index = lex.getDocString();
 407         else
 408                 index = from_ascii("idx");
 409 }
 410
 411
 412 /////////////////////////////////////////////////////////////////////
 413 //
 414 // InsetPrintIndex
 415 //
 416 ///////////////////////////////////////////////////////////////////////
 417
 418 InsetPrintIndex::InsetPrintIndex(Buffer * buf, InsetCommandParams const & p)
 419         : InsetCommand(buf, p, "index_print")
 420 {}
 421
 422
 423 ParamInfo const & InsetPrintIndex::findInfo(string const & /* cmdName */)
 424 {
 425         static ParamInfo param_info_;
 426         if (param_info_.empty()) {
 427                 param_info_.add("type", ParamInfo::LATEX_OPTIONAL);
 428                 param_info_.add("name", ParamInfo::LATEX_REQUIRED);
 429         }
 430         return param_info_;
 431 }
 432
 433
 434 docstring InsetPrintIndex::screenLabel() const
 435 {
 436         bool const printall = suffixIs(getCmdName(), '*');
 437         bool const multind = buffer().masterBuffer()->params().use_indices;
 438         if ((!multind
 439              && getParam("type") == from_ascii("idx"))
 440             || (getParam("type").empty() && !printall))
 441                 return _("Index");
 442         Buffer const & realbuffer = *buffer().masterBuffer();
 443         IndicesList const & indiceslist = realbuffer.params().indiceslist();
 444         Index const * index = indiceslist.findShortcut(getParam("type"));
 445         if (!index && !printall)
 446                 return _("Unknown index type!");
 447         docstring res = printall ? _("All indices") : index->index();
 448         if (!multind)
 449                 res += " (" + _("non-active") + ")";
 450         else if (contains(getCmdName(), "printsubindex"))
 451                 res += " (" + _("subindex") + ")";
 452         return res;
 453 }
 454
 455
 456 bool InsetPrintIndex::isCompatibleCommand(string const & s)
 457 {
 458         return s == "printindex" || s == "printsubindex"
 459                 || s == "printindex*" || s == "printsubindex*";
 460 }
 461
 462
 463 void InsetPrintIndex::doDispatch(Cursor & cur, FuncRequest & cmd)
 464 {
 465         switch (cmd.action_) {
 466
 467         case LFUN_INSET_MODIFY: {
 468                 if (cmd.argument() == from_ascii("toggle-subindex")) {
 469                         string cmd = getCmdName();
 470                         if (contains(cmd, "printindex"))
 471                                 cmd = subst(cmd, "printindex", "printsubindex");
 472                         else
 473                                 cmd = subst(cmd, "printsubindex", "printindex");
 474                         setCmdName(cmd);
 475                         break;
 476                 } else if (cmd.argument() == from_ascii("check-printindex*")) {
 477                         string cmd = getCmdName();
 478                         if (suffixIs(cmd, '*'))
 479                                 break;
 480                         cmd += '*';
 481                         setParam("type", docstring());
 482                         setCmdName(cmd);
 483                         break;
 484                 }
 485                 InsetCommandParams p(INDEX_PRINT_CODE);
 486                 // FIXME UNICODE
 487                 InsetCommand::string2params("index_print",
 488                         to_utf8(cmd.argument()), p);
 489                 if (p.getCmdName().empty()) {
 490                         cur.noUpdate();
 491                         break;
 492                 }
 493                 setParams(p);
 494                 break;
 495         }
 496
 497         default:
 498                 InsetCommand::doDispatch(cur, cmd);
 499                 break;
 500         }
 501 }
 502
 503
 504 bool InsetPrintIndex::getStatus(Cursor & cur, FuncRequest const & cmd,
 505         FuncStatus & status) const
 506 {
 507         switch (cmd.action_) {
 508
 509         case LFUN_INSET_MODIFY: {
 510                 if (cmd.argument() == from_ascii("toggle-subindex")) {
 511                         status.setEnabled(buffer().masterBuffer()->params().use_indices);
 512                         status.setOnOff(contains(getCmdName(), "printsubindex"));
 513                         return true;
 514                 } else if (cmd.argument() == from_ascii("check-printindex*")) {
 515                         status.setEnabled(buffer().masterBuffer()->params().use_indices);
 516                         status.setOnOff(suffixIs(getCmdName(), '*'));
 517                         return true;
 518                 } if (cmd.getArg(0) == "index_print"
 519                     && cmd.getArg(1) == "CommandInset") {
 520                         InsetCommandParams p(INDEX_PRINT_CODE);
 521                         InsetCommand::string2params("index_print",
 522                                 to_utf8(cmd.argument()), p);
 523                         if (suffixIs(p.getCmdName(), '*')) {
 524                                 status.setEnabled(true);
 525                                 status.setOnOff(false);
 526                                 return true;
 527                         }
 528                         Buffer const & realbuffer = *buffer().masterBuffer();
 529                         IndicesList const & indiceslist =
 530                                 realbuffer.params().indiceslist();
 531                         Index const * index = indiceslist.findShortcut(p["type"]);
 532                         status.setEnabled(index != 0);
 533                         status.setOnOff(p["type"] == getParam("type"));
 534                         return true;
 535                 } else
 536                         return InsetCommand::getStatus(cur, cmd, status);
 537         }
 538
 539         case LFUN_INSET_DIALOG_UPDATE: {
 540                 status.setEnabled(buffer().masterBuffer()->params().use_indices);
 541                 return true;
 542         }
 543
 544         default:
 545                 return InsetCommand::getStatus(cur, cmd, status);
 546         }
 547 }
 548
 549
 550 int InsetPrintIndex::latex(odocstream & os, OutputParams const & runparams_in) const
 551 {
 552         if (!buffer().masterBuffer()->params().use_indices) {
 553                 if (getParam("type") == from_ascii("idx"))
 554                         os << "\\printindex{}";
 555                 return 0;
 556         }
 557         OutputParams runparams = runparams_in;
 558         os << getCommand(runparams);
 559         return 0;
 560 }
 561
 562
 563 void InsetPrintIndex::validate(LaTeXFeatures & features) const
 564 {
 565         features.require("makeidx");
 566         if (buffer().masterBuffer()->params().use_indices)
 567                 features.require("splitidx");
 568 }
 569
 570
 571 docstring InsetPrintIndex::contextMenu(BufferView const &, int, int) const
 572 {
 573         return buffer().masterBuffer()->params().use_indices ?
 574                 from_ascii("context-indexprint") : docstring();
 575 }
 576
 577
 578 bool InsetPrintIndex::hasSettings() const
 579 {
 580         return buffer().masterBuffer()->params().use_indices;
 581 }
 582
 583
 584 namespace {
 585
 586 void parseItem(docstring & s, bool for_output)
 587 {
 588         // this does not yet check for escaped things
 589         size_type loc = s.find(from_ascii("@"));
 590         if (loc != string::npos) {
 591                 if (for_output)
 592                         s.erase(0, loc + 1);
 593                 else
 594                         s.erase(loc);
 595         }
 596         loc = s.find(from_ascii("|"));
 597         if (loc != string::npos)
 598                 s.erase(loc);
 599 }
 600
 601
 602 void extractSubentries(docstring const & entry, docstring & main,
 603                 docstring & sub1, docstring & sub2)
 604 {
 605         if (entry.empty())
 606                 return;
 607         size_type const loc = entry.find(from_ascii(" ! "));
 608         if (loc == string::npos)
 609                 main = entry;
 610         else {
 611                 main = trim(entry.substr(0, loc));
 612                 size_t const locend = loc + 3;
 613                 size_type const loc2 = entry.find(from_ascii(" ! "), locend);
 614                 if (loc2 == string::npos) {
 615                         sub1 = trim(entry.substr(locend));
 616                 } else {
 617                         sub1 = trim(entry.substr(locend, loc2 - locend));
 618                         sub2 = trim(entry.substr(loc2 + 3));
 619                 }
 620         }
 621 }
 622
 623
 624 struct IndexEntry
 625 {
 626         IndexEntry()
 627         {}
 628
 629         IndexEntry(docstring const & s, DocIterator const & d)
 630                         : dit(d)
 631         {
 632                 extractSubentries(s, main, sub, subsub);
 633                 parseItem(main, false);
 634                 parseItem(sub, false);
 635                 parseItem(subsub, false);
 636         }
 637
 638         bool equal(IndexEntry const & rhs) const
 639         {
 640                 return main == rhs.main && sub == rhs.sub && subsub == rhs.subsub;
 641         }
 642
 643         bool same_sub(IndexEntry const & rhs) const
 644         {
 645                 return main == rhs.main && sub == rhs.sub;
 646         }
 647
 648         bool same_main(IndexEntry const & rhs) const
 649         {
 650                 return main == rhs.main;
 651         }
 652
 653         docstring main;
 654         docstring sub;
 655         docstring subsub;
 656         DocIterator dit;
 657 };
 658
 659 bool operator<(IndexEntry const & lhs, IndexEntry const & rhs)
 660 {
 661         return lhs.main < rhs.main
 662                         || (lhs.main == rhs.main && lhs.sub < rhs.sub)
 663                         || (lhs.main == rhs.main && lhs.sub == rhs.sub && lhs.subsub < rhs.subsub);
 664 }
 665
 666 } // anon namespace
 667
 668
 669 docstring InsetPrintIndex::xhtml(XHTMLStream &, OutputParams const & op) const
 670 {
 671         BufferParams const & bp = buffer().masterBuffer()->params();
 672
 673         // we do not presently support multiple indices, so we refuse to print
 674         // anything but the main index, so as not to generate multiple indices.
 675         // NOTE Multiple index support would require some work. The reason
 676         // is that the TOC does not know about multiple indices. Either it would
 677         // need to be told about them (not a bad idea), or else the index entries
 678         // would need to be collected differently, say, during validation.
 679         if (bp.use_indices && getParam("type") != from_ascii("idx"))
 680                 return docstring();
 681
 682         Toc const & toc = buffer().tocBackend().toc("index");
 683         if (toc.empty())
 684                 return docstring();
 685
 686         // Collection the index entries in a form we can use them.
 687         Toc::const_iterator it = toc.begin();
 688         Toc::const_iterator const en = toc.end();
 689         vector<IndexEntry> entries;
 690         for (; it != en; ++it)
 691                 entries.push_back(IndexEntry(it->str(), it->dit()));
 692         stable_sort(entries.begin(), entries.end());
 693
 694         Layout const & lay = bp.documentClass().htmlTOCLayout();
 695         string const & tocclass = lay.defaultCSSClass();
 696         string const tocattr = "class='tochead " + tocclass + "'";
 697
 698         // we'll use our own stream, because we are going to defer everything.
 699         // that's how we deal with the fact that we're probably inside a standard
 700         // paragraph, and we don't want to be.
 701         odocstringstream ods;
 702         XHTMLStream xs(ods);
 703
 704         xs << html::StartTag("div", "class='index'");
 705         xs << html::StartTag(lay.htmltag(), lay.htmlattr())
 706                  << _("Index")
 707                  << html::EndTag(lay.htmltag());
 708         xs << html::StartTag("ul", "class='main'");
 709         Font const dummy;
 710
 711         vector<IndexEntry>::const_iterator eit = entries.begin();
 712         vector<IndexEntry>::const_iterator const een = entries.end();
 713         // tracks whether we are already inside a main entry (1),
 714         // a sub-entry (2), or a sub-sub-entry (3). see below for the
 715         // details.
 716         int level = 1;
 717         // the last one we saw
 718         IndexEntry last;
 719         int entry_number = -1;
 720         for (; eit != een; ++eit) {
 721                 Paragraph const & par = eit->dit.innerParagraph();
 722                 if (entry_number == -1 || !eit->equal(last)) {
 723                         if (entry_number != -1) {
 724                                 // not the first time through the loop, so
 725                                 // close last entry or entries, depending.
 726                                 if (level == 3) {
 727                                         // close this sub-sub-entry
 728                                         xs << html::EndTag("li");
 729                                         xs.cr();
 730                                         // is this another sub-sub-entry within the same sub-entry?
 731                                         if (!eit->same_sub(last)) {
 732                                                 // close this level
 733                                                 xs << html::EndTag("ul");
 734                                                 xs.cr();
 735                                                 level = 2;
 736                                         }
 737                                 }
 738                                 // the point of the second test here is that we might get
 739                                 // here two ways: (i) by falling through from above; (ii) because,
 740                                 // though the sub-entry hasn't changed, the sub-sub-entry has,
 741                                 // which means that it is the first sub-sub-entry within this
 742                                 // sub-entry. In that case, we do not want to close anything.
 743                                 if (level == 2 && !eit->same_sub(last)) {
 744                                         // close sub-entry
 745                                         xs << html::EndTag("li");
 746                                         xs.cr();
 747                                         // is this another sub-entry with the same main entry?
 748                                         if (!eit->same_main(last)) {
 749                                                 // close this level
 750                                                 xs << html::EndTag("ul");
 751                                                 xs.cr();
 752                                                 level = 1;
 753                                         }
 754                                 }
 755                                 // again, we can get here two ways: from above, or because we have
 756                                 // found the first sub-entry. in the latter case, we do not want to
 757                                 // close the entry.
 758                                 if (level == 1 && !eit->same_main(last)) {
 759                                         // close entry
 760                                         xs << html::EndTag("li");
 761                                         xs.cr();
 762                                 }
 763                         }
 764
 765                         // we'll be starting new entries
 766                         entry_number = 0;
 767
 768                         // We need to use our own stream, since we will have to
 769                         // modify what we get back.
 770                         odocstringstream ent;
 771                         XHTMLStream entstream(ent);
 772                         OutputParams ours = op;
 773                         ours.for_toc = true;
 774                         par.simpleLyXHTMLOnePar(buffer(), entstream, ours, dummy);
 775
 776                         // these will contain XHTML versions of the main entry, etc
 777                         // remember that everything will already have been escaped,
 778                         // so we'll need to use NextRaw() during output.
 779                         docstring main;
 780                         docstring sub;
 781                         docstring subsub;
 782                         extractSubentries(ent.str(), main, sub, subsub);
 783                         parseItem(main, true);
 784                         parseItem(sub, true);
 785                         parseItem(subsub, true);
 786
 787                         if (level == 3) {
 788                                 // another subsubentry
 789                                 xs << html::StartTag("li", "class='subsubentry'")
 790                                    << XHTMLStream::NextRaw() << subsub;
 791                         } else if (level == 2) {
 792                                 // there are two ways we can be here:
 793                                 // (i) we can actually be inside a sub-entry already and be about
 794                                 //     to output the first sub-sub-entry. in this case, our sub
 795                                 //     and the last sub will be the same.
 796                                 // (ii) we can just have closed a sub-entry, possibly after also
 797                                 //     closing a list of sub-sub-entries. here our sub and the last
 798                                 //     sub are different.
 799                                 // only in the latter case do we need to output the new sub-entry.
 800                                 // note that in this case, too, though, the sub-entry might already
 801                                 // have a sub-sub-entry.
 802                                 if (eit->sub != last.sub)
 803                                         xs << html::StartTag("li", "class='subentry'")
 804                                            << XHTMLStream::NextRaw() << sub;
 805                                 if (!subsub.empty()) {
 806                                         // it's actually a subsubentry, so we need to start that list
 807                                         xs.cr();
 808                                         xs << html::StartTag("ul", "class='subsubentry'")
 809                                            << html::StartTag("li", "class='subsubentry'")
 810                                            << XHTMLStream::NextRaw() << subsub;
 811                                         level = 3;
 812                                 }
 813                         } else {
 814                                 // there are also two ways we can be here:
 815                                 // (i) we can actually be inside an entry already and be about
 816                                 //     to output the first sub-entry. in this case, our main
 817                                 //     and the last main will be the same.
 818                                 // (ii) we can just have closed an entry, possibly after also
 819                                 //     closing a list of sub-entries. here our main and the last
 820                                 //     main are different.
 821                                 // only in the latter case do we need to output the new main entry.
 822                                 // note that in this case, too, though, the main entry might already
 823                                 // have a sub-entry, or even a sub-sub-entry.
 824                                 if (eit->main != last.main)
 825                                         xs << html::StartTag("li", "class='main'") << main;
 826                                 if (!sub.empty()) {
 827                                         // there's a sub-entry, too
 828                                         xs.cr();
 829                                         xs << html::StartTag("ul", "class='subentry'")
 830                                            << html::StartTag("li", "class='subentry'")
 831                                            << XHTMLStream::NextRaw() << sub;
 832                                         level = 2;
 833                                         if (!subsub.empty()) {
 834                                                 // and a sub-sub-entry
 835                                                 xs.cr();
 836                                                 xs << html::StartTag("ul", "class='subsubentry'")
 837                                                    << html::StartTag("li", "class='subsubentry'")
 838                                                    << XHTMLStream::NextRaw() << subsub;
 839                                                 level = 3;
 840                                         }
 841                                 }
 842                         }
 843                 }
 844                 // finally, then, we can output the index link itself
 845                 string const parattr = "href='#" + par.magicLabel() + "'";
 846                 xs << (entry_number == 0 ? ":" : ",");
 847                 xs << " " << html::StartTag("a", parattr)
 848                    << ++entry_number << html::EndTag("a");
 849                 last = *eit;
 850         }
 851         // now we have to close all the open levels
 852         while (level > 0) {
 853                 xs << html::EndTag("li") << html::EndTag("ul");
 854                 xs.cr();
 855                 --level;
 856         }
 857         xs << html::EndTag("div");
 858         xs.cr();
 859         return ods.str();
 860 }
 861
 862 } // namespace lyx