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 "Cursor.h"
  20 #include "DispatchResult.h"
  21 #include "Encoding.h"
  22 #include "FuncRequest.h"
  23 #include "FuncStatus.h"
  24 #include "IndicesList.h"
  25 #include "Language.h"
  26 #include "LaTeXFeatures.h"
  27 #include "Lexer.h"
  28 #include "output_latex.h"
  29 #include "output_xhtml.h"
  30 #include "sgml.h"
  31 #include "TextClass.h"
  32 #include "TocBackend.h"
  33
  34 #include "support/debug.h"
  35 #include "support/docstream.h"
  36 #include "support/gettext.h"
  37 #include "support/lstrings.h"
  38
  39 #include "frontends/alert.h"
  40
  41 #include <algorithm>
  42 #include <ostream>
  43
  44 using namespace std;
  45 using namespace lyx::support;
  46
  47 namespace lyx {
  48
  49 /////////////////////////////////////////////////////////////////////
  50 //
  51 // InsetIndex
  52 //
  53 ///////////////////////////////////////////////////////////////////////
  54
  55
  56 InsetIndex::InsetIndex(Buffer * buf, InsetIndexParams const & params)
  57         : InsetCollapsable(buf), params_(params)
  58 {}
  59
  60
  61 void InsetIndex::latex(otexstream & os, OutputParams const & runparams_in) const
  62 {
  63         OutputParams runparams(runparams_in);
  64         runparams.inIndexEntry = true;
  65
  66         if (buffer().masterBuffer()->params().use_indices && !params_.index.empty()
  67             && params_.index != "idx") {
  68                 os << "\\sindex[";
  69                 os << escape(params_.index);
  70                 os << "]{";
  71         } else {
  72                 os << "\\index";
  73                 os << '{';
  74         }
  75
  76         // get contents of InsetText as LaTeX and plaintext
  77         TexRow texrow;
  78         odocstringstream ourlatex;
  79         otexstream ots(ourlatex, texrow);
  80         InsetText::latex(ots, runparams);
  81         odocstringstream ourplain;
  82         InsetText::plaintext(ourplain, runparams);
  83         docstring latexstr = ourlatex.str();
  84         docstring plainstr = ourplain.str();
  85
  86         // this will get what follows | if anything does
  87         docstring cmd;
  88
  89         // check for the | separator
  90         // FIXME This would go wrong on an escaped "|", but
  91         // how far do we want to go here?
  92         size_t pos = latexstr.find(from_ascii("|"));
  93         if (pos != docstring::npos) {
  94                 // put the bit after "|" into cmd...
  95                 cmd = latexstr.substr(pos + 1);
  96                 // ...and erase that stuff from latexstr
  97                 latexstr = latexstr.erase(pos);
  98                 // ...and similarly from plainstr
  99                 size_t ppos = plainstr.find(from_ascii("|"));
 100                 if (ppos < plainstr.size())
 101                         plainstr.erase(ppos);
 102                 else
 103                         LYXERR0("The `|' separator was not found in the plaintext version!");
 104         }
 105
 106         // Separate the entires and subentries, i.e., split on "!"
 107         // FIXME This would do the wrong thing with escaped ! characters
 108         std::vector<docstring> const levels =
 109                 getVectorFromString(latexstr, from_ascii("!"), true);
 110         std::vector<docstring> const levels_plain =
 111                 getVectorFromString(plainstr, from_ascii("!"), true);
 112
 113         vector<docstring>::const_iterator it = levels.begin();
 114         vector<docstring>::const_iterator end = levels.end();
 115         vector<docstring>::const_iterator it2 = levels_plain.begin();
 116         bool first = true;
 117         for (; it != end; ++it) {
 118                 // write the separator except the first time
 119                 if (!first)
 120                         os << '!';
 121                 else
 122                         first = false;
 123
 124                 // correctly sort macros and formatted strings
 125                 // if we do find a command, prepend a plain text
 126                 // version of the content to get sorting right,
 127                 // e.g. \index{LyX@\LyX}, \index{text@\textbf{text}}
 128                 // Don't do that if the user entered '@' himself, though.
 129                 if (contains(*it, '\\') && !contains(*it, '@')) {
 130                         // Plaintext might return nothing (e.g. for ERTs)
 131                         docstring const spart =
 132                                 (it2 < levels_plain.end() && !(*it2).empty())
 133                                 ? *it2 : *it;
 134                         // Now we need to validate that all characters in
 135                         // the sorting part are representable in the current
 136                         // encoding. If not try the LaTeX macro which might
 137                         // or might not be a good choice, and issue a warning.
 138                         pair<docstring, docstring> spart_latexed =
 139                                 runparams.encoding->latexString(spart, runparams.dryrun);
 140                         if (!spart_latexed.second.empty())
 141                                         LYXERR0("Uncodable character in index entry. Sorting might be wrong!");
 142                         if (spart != spart_latexed.first && !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(spart_latexed.first, 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         }
 165         os << '}';
 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                         cur.recordUndoInset(this);
 204                         params_.index = from_utf8(cmd.getArg(1));
 205                         break;
 206                 }
 207                 InsetIndexParams params;
 208                 InsetIndex::string2params(to_utf8(cmd.argument()), params);
 209                 cur.recordUndoInset(this);
 210                 params_.index = params.index;
 211                 // what we really want here is a TOC update, but that means
 212                 // a full buffer update
 213                 cur.forceBufferUpdate();
 214                 break;
 215         }
 216
 217         case LFUN_INSET_DIALOG_UPDATE:
 218                 cur.bv().updateDialog("index", params2string(params_));
 219                 break;
 220
 221         default:
 222                 InsetCollapsable::doDispatch(cur, cmd);
 223                 break;
 224         }
 225 }
 226
 227
 228 bool InsetIndex::getStatus(Cursor & cur, FuncRequest const & cmd,
 229                 FuncStatus & flag) const
 230 {
 231         switch (cmd.action()) {
 232
 233         case LFUN_INSET_MODIFY:
 234                 if (cmd.getArg(0) == "changetype") {
 235                         docstring const newtype = from_utf8(cmd.getArg(1));
 236                         Buffer const & realbuffer = *buffer().masterBuffer();
 237                         IndicesList const & indiceslist = realbuffer.params().indiceslist();
 238                         Index const * index = indiceslist.findShortcut(newtype);
 239                         flag.setEnabled(index != 0);
 240                         flag.setOnOff(
 241                                 from_utf8(cmd.getArg(1)) == params_.index);
 242                         return true;
 243                 }
 244                 return InsetCollapsable::getStatus(cur, cmd, flag);
 245
 246         case LFUN_INSET_DIALOG_UPDATE: {
 247                 Buffer const & realbuffer = *buffer().masterBuffer();
 248                 flag.setEnabled(realbuffer.params().use_indices);
 249                 return true;
 250         }
 251
 252         default:
 253                 return InsetCollapsable::getStatus(cur, cmd, flag);
 254         }
 255 }
 256
 257
 258 ColorCode InsetIndex::labelColor() const
 259 {
 260         if (params_.index.empty() || params_.index == from_ascii("idx"))
 261                 return InsetCollapsable::labelColor();
 262         // FIXME UNICODE
 263         ColorCode c = lcolor.getFromLyXName(to_utf8(params_.index));
 264         if (c == Color_none)
 265                 c = InsetCollapsable::labelColor();
 266         return c;
 267 }
 268
 269
 270 docstring InsetIndex::toolTip(BufferView const &, int, int) const
 271 {
 272         docstring tip = _("Index Entry");
 273         if (buffer().params().use_indices && !params_.index.empty()) {
 274                 Buffer const & realbuffer = *buffer().masterBuffer();
 275                 IndicesList const & indiceslist = realbuffer.params().indiceslist();
 276                 tip += " (";
 277                 Index const * index = indiceslist.findShortcut(params_.index);
 278                 if (!index)
 279                         tip += _("unknown type!");
 280                 else
 281                         tip += index->index();
 282                 tip += ")";
 283         }
 284         tip += ": ";
 285         return toolTipText(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(layoutName());
 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, bool output_active) const
 352 {
 353         DocIterator pit = cpit;
 354         pit.push_back(CursorSlice(const_cast<InsetIndex &>(*this)));
 355         docstring str;
 356         text().forOutliner(str, 0);
 357         buffer().tocBackend().toc("index").push_back(TocItem(pit, 0, str, output_active));
 358         // Proceed with the rest of the inset.
 359         InsetCollapsable::addToToc(cpit, output_active);
 360 }
 361
 362
 363 void InsetIndex::validate(LaTeXFeatures & features) const
 364 {
 365         if (buffer().masterBuffer()->params().use_indices
 366             && !params_.index.empty()
 367             && params_.index != "idx")
 368                 features.require("splitidx");
 369         InsetCollapsable::validate(features);
 370 }
 371
 372
 373 string InsetIndex::contextMenuName() const
 374 {
 375         return "context-index";
 376 }
 377
 378
 379 bool InsetIndex::hasSettings() const
 380 {
 381         return buffer().masterBuffer()->params().use_indices;
 382 }
 383
 384
 385
 386
 387 /////////////////////////////////////////////////////////////////////
 388 //
 389 // InsetIndexParams
 390 //
 391 ///////////////////////////////////////////////////////////////////////
 392
 393
 394 void InsetIndexParams::write(ostream & os) const
 395 {
 396         os << ' ';
 397         if (!index.empty())
 398                 os << to_utf8(index);
 399         else
 400                 os << "idx";
 401         os << '\n';
 402 }
 403
 404
 405 void InsetIndexParams::read(Lexer & lex)
 406 {
 407         if (lex.eatLine())
 408                 index = lex.getDocString();
 409         else
 410                 index = from_ascii("idx");
 411 }
 412
 413
 414 /////////////////////////////////////////////////////////////////////
 415 //
 416 // InsetPrintIndex
 417 //
 418 ///////////////////////////////////////////////////////////////////////
 419
 420 InsetPrintIndex::InsetPrintIndex(Buffer * buf, InsetCommandParams const & p)
 421         : InsetCommand(buf, p)
 422 {}
 423
 424
 425 ParamInfo const & InsetPrintIndex::findInfo(string const & /* cmdName */)
 426 {
 427         static ParamInfo param_info_;
 428         if (param_info_.empty()) {
 429                 param_info_.add("type", ParamInfo::LATEX_OPTIONAL,
 430                         ParamInfo::HANDLING_ESCAPE);
 431                 param_info_.add("name", ParamInfo::LATEX_REQUIRED);
 432         }
 433         return param_info_;
 434 }
 435
 436
 437 docstring InsetPrintIndex::screenLabel() const
 438 {
 439         bool const printall = suffixIs(getCmdName(), '*');
 440         bool const multind = buffer().masterBuffer()->params().use_indices;
 441         if ((!multind
 442              && getParam("type") == from_ascii("idx"))
 443             || (getParam("type").empty() && !printall))
 444                 return _("Index");
 445         Buffer const & realbuffer = *buffer().masterBuffer();
 446         IndicesList const & indiceslist = realbuffer.params().indiceslist();
 447         Index const * index = indiceslist.findShortcut(getParam("type"));
 448         if (!index && !printall)
 449                 return _("Unknown index type!");
 450         docstring res = printall ? _("All indexes") : index->index();
 451         if (!multind)
 452                 res += " (" + _("non-active") + ")";
 453         else if (contains(getCmdName(), "printsubindex"))
 454                 res += " (" + _("subindex") + ")";
 455         return res;
 456 }
 457
 458
 459 bool InsetPrintIndex::isCompatibleCommand(string const & s)
 460 {
 461         return s == "printindex" || s == "printsubindex"
 462                 || s == "printindex*" || s == "printsubindex*";
 463 }
 464
 465
 466 void InsetPrintIndex::doDispatch(Cursor & cur, FuncRequest & cmd)
 467 {
 468         switch (cmd.action()) {
 469
 470         case LFUN_INSET_MODIFY: {
 471                 if (cmd.argument() == from_ascii("toggle-subindex")) {
 472                         string cmd = getCmdName();
 473                         if (contains(cmd, "printindex"))
 474                                 cmd = subst(cmd, "printindex", "printsubindex");
 475                         else
 476                                 cmd = subst(cmd, "printsubindex", "printindex");
 477                         cur.recordUndo();
 478                         setCmdName(cmd);
 479                         break;
 480                 } else if (cmd.argument() == from_ascii("check-printindex*")) {
 481                         string cmd = getCmdName();
 482                         if (suffixIs(cmd, '*'))
 483                                 break;
 484                         cmd += '*';
 485                         cur.recordUndo();
 486                         setParam("type", docstring());
 487                         setCmdName(cmd);
 488                         break;
 489                 }
 490                 InsetCommandParams p(INDEX_PRINT_CODE);
 491                 // FIXME UNICODE
 492                 InsetCommand::string2params(to_utf8(cmd.argument()), p);
 493                 if (p.getCmdName().empty()) {
 494                         cur.noScreenUpdate();
 495                         break;
 496                 }
 497                 cur.recordUndo();
 498                 setParams(p);
 499                 break;
 500         }
 501
 502         default:
 503                 InsetCommand::doDispatch(cur, cmd);
 504                 break;
 505         }
 506 }
 507
 508
 509 bool InsetPrintIndex::getStatus(Cursor & cur, FuncRequest const & cmd,
 510         FuncStatus & status) const
 511 {
 512         switch (cmd.action()) {
 513
 514         case LFUN_INSET_MODIFY: {
 515                 if (cmd.argument() == from_ascii("toggle-subindex")) {
 516                         status.setEnabled(buffer().masterBuffer()->params().use_indices);
 517                         status.setOnOff(contains(getCmdName(), "printsubindex"));
 518                         return true;
 519                 } else if (cmd.argument() == from_ascii("check-printindex*")) {
 520                         status.setEnabled(buffer().masterBuffer()->params().use_indices);
 521                         status.setOnOff(suffixIs(getCmdName(), '*'));
 522                         return true;
 523                 } if (cmd.getArg(0) == "index_print"
 524                     && cmd.getArg(1) == "CommandInset") {
 525                         InsetCommandParams p(INDEX_PRINT_CODE);
 526                         InsetCommand::string2params(to_utf8(cmd.argument()), p);
 527                         if (suffixIs(p.getCmdName(), '*')) {
 528                                 status.setEnabled(true);
 529                                 status.setOnOff(false);
 530                                 return true;
 531                         }
 532                         Buffer const & realbuffer = *buffer().masterBuffer();
 533                         IndicesList const & indiceslist =
 534                                 realbuffer.params().indiceslist();
 535                         Index const * index = indiceslist.findShortcut(p["type"]);
 536                         status.setEnabled(index != 0);
 537                         status.setOnOff(p["type"] == getParam("type"));
 538                         return true;
 539                 } else
 540                         return InsetCommand::getStatus(cur, cmd, status);
 541         }
 542
 543         case LFUN_INSET_DIALOG_UPDATE: {
 544                 status.setEnabled(buffer().masterBuffer()->params().use_indices);
 545                 return true;
 546         }
 547
 548         default:
 549                 return InsetCommand::getStatus(cur, cmd, status);
 550         }
 551 }
 552
 553
 554 void InsetPrintIndex::latex(otexstream & os, OutputParams const & runparams_in) const
 555 {
 556         if (!buffer().masterBuffer()->params().use_indices) {
 557                 if (getParam("type") == from_ascii("idx"))
 558                         os << "\\printindex{}";
 559                 return;
 560         }
 561         OutputParams runparams = runparams_in;
 562         os << getCommand(runparams);
 563 }
 564
 565
 566 void InsetPrintIndex::validate(LaTeXFeatures & features) const
 567 {
 568         features.require("makeidx");
 569         if (buffer().masterBuffer()->params().use_indices)
 570                 features.require("splitidx");
 571 }
 572
 573
 574 string InsetPrintIndex::contextMenuName() const
 575 {
 576         return buffer().masterBuffer()->params().use_indices ?
 577                 "context-indexprint" : string();
 578 }
 579
 580
 581 bool InsetPrintIndex::hasSettings() const
 582 {
 583         return buffer().masterBuffer()->params().use_indices;
 584 }
 585
 586
 587 namespace {
 588
 589 void parseItem(docstring & s, bool for_output)
 590 {
 591         // this does not yet check for escaped things
 592         size_type loc = s.find(from_ascii("@"));
 593         if (loc != string::npos) {
 594                 if (for_output)
 595                         s.erase(0, loc + 1);
 596                 else
 597                         s.erase(loc);
 598         }
 599         loc = s.find(from_ascii("|"));
 600         if (loc != string::npos)
 601                 s.erase(loc);
 602 }
 603
 604
 605 void extractSubentries(docstring const & entry, docstring & main,
 606                 docstring & sub1, docstring & sub2)
 607 {
 608         if (entry.empty())
 609                 return;
 610         size_type const loc = entry.find(from_ascii(" ! "));
 611         if (loc == string::npos)
 612                 main = entry;
 613         else {
 614                 main = trim(entry.substr(0, loc));
 615                 size_t const locend = loc + 3;
 616                 size_type const loc2 = entry.find(from_ascii(" ! "), locend);
 617                 if (loc2 == string::npos) {
 618                         sub1 = trim(entry.substr(locend));
 619                 } else {
 620                         sub1 = trim(entry.substr(locend, loc2 - locend));
 621                         sub2 = trim(entry.substr(loc2 + 3));
 622                 }
 623         }
 624 }
 625
 626
 627 struct IndexEntry
 628 {
 629         IndexEntry()
 630         {}
 631
 632         IndexEntry(docstring const & s, DocIterator const & d)
 633                         : dit(d)
 634         {
 635                 extractSubentries(s, main, sub, subsub);
 636                 parseItem(main, false);
 637                 parseItem(sub, false);
 638                 parseItem(subsub, false);
 639         }
 640
 641         bool equal(IndexEntry const & rhs) const
 642         {
 643                 return main == rhs.main && sub == rhs.sub && subsub == rhs.subsub;
 644         }
 645
 646         bool same_sub(IndexEntry const & rhs) const
 647         {
 648                 return main == rhs.main && sub == rhs.sub;
 649         }
 650
 651         bool same_main(IndexEntry const & rhs) const
 652         {
 653                 return main == rhs.main;
 654         }
 655
 656         docstring main;
 657         docstring sub;
 658         docstring subsub;
 659         DocIterator dit;
 660 };
 661
 662 bool operator<(IndexEntry const & lhs, IndexEntry const & rhs)
 663 {
 664         int comp = compare_no_case(lhs.main, rhs.main);
 665         if (comp == 0)
 666                 comp = compare_no_case(lhs.sub, rhs.sub);
 667         if (comp == 0)
 668                 comp = compare_no_case(lhs.subsub, rhs.subsub);
 669         return (comp < 0);
 670 }
 671
 672 } // anon namespace
 673
 674
 675 docstring InsetPrintIndex::xhtml(XHTMLStream &, OutputParams const & op) const
 676 {
 677         BufferParams const & bp = buffer().masterBuffer()->params();
 678
 679         // we do not presently support multiple indices, so we refuse to print
 680         // anything but the main index, so as not to generate multiple indices.
 681         // NOTE Multiple index support would require some work. The reason
 682         // is that the TOC does not know about multiple indices. Either it would
 683         // need to be told about them (not a bad idea), or else the index entries
 684         // would need to be collected differently, say, during validation.
 685         if (bp.use_indices && getParam("type") != from_ascii("idx"))
 686                 return docstring();
 687
 688         Toc const & toc = buffer().tocBackend().toc("index");
 689         if (toc.empty())
 690                 return docstring();
 691
 692         // Collect the index entries in a form we can use them.
 693         Toc::const_iterator it = toc.begin();
 694         Toc::const_iterator const en = toc.end();
 695         vector<IndexEntry> entries;
 696         for (; it != en; ++it)
 697                 if (it->isOutput())
 698                         entries.push_back(IndexEntry(it->str(), it->dit()));
 699
 700         if (entries.empty())
 701                 // not very likely that all the index entries are in notes or
 702                 // whatever, but....
 703                 return docstring();
 704
 705         stable_sort(entries.begin(), entries.end());
 706
 707         Layout const & lay = bp.documentClass().htmlTOCLayout();
 708         string const & tocclass = lay.defaultCSSClass();
 709         string const tocattr = "class='index " + tocclass + "'";
 710
 711         // we'll use our own stream, because we are going to defer everything.
 712         // that's how we deal with the fact that we're probably inside a standard
 713         // paragraph, and we don't want to be.
 714         odocstringstream ods;
 715         XHTMLStream xs(ods);
 716
 717         xs << html::StartTag("div", tocattr);
 718         xs << html::StartTag(lay.htmltag(), lay.htmlattr())
 719                  << translateIfPossible(from_ascii("Index"),
 720                                   op.local_font->language()->lang())
 721                  << html::EndTag(lay.htmltag());
 722         xs << html::StartTag("ul", "class='main'");
 723         Font const dummy;
 724
 725         vector<IndexEntry>::const_iterator eit = entries.begin();
 726         vector<IndexEntry>::const_iterator const een = entries.end();
 727         // tracks whether we are already inside a main entry (1),
 728         // a sub-entry (2), or a sub-sub-entry (3). see below for the
 729         // details.
 730         int level = 1;
 731         // the last one we saw
 732         IndexEntry last;
 733         int entry_number = -1;
 734         for (; eit != een; ++eit) {
 735                 Paragraph const & par = eit->dit.innerParagraph();
 736                 if (entry_number == -1 || !eit->equal(last)) {
 737                         if (entry_number != -1) {
 738                                 // not the first time through the loop, so
 739                                 // close last entry or entries, depending.
 740                                 if (level == 3) {
 741                                         // close this sub-sub-entry
 742                                         xs << html::EndTag("li") << html::CR();
 743                                         // is this another sub-sub-entry within the same sub-entry?
 744                                         if (!eit->same_sub(last)) {
 745                                                 // close this level
 746                                                 xs << html::EndTag("ul") << html::CR();
 747                                                 level = 2;
 748                                         }
 749                                 }
 750                                 // the point of the second test here is that we might get
 751                                 // here two ways: (i) by falling through from above; (ii) because,
 752                                 // though the sub-entry hasn't changed, the sub-sub-entry has,
 753                                 // which means that it is the first sub-sub-entry within this
 754                                 // sub-entry. In that case, we do not want to close anything.
 755                                 if (level == 2 && !eit->same_sub(last)) {
 756                                         // close sub-entry
 757                                         xs << html::EndTag("li") << html::CR();
 758                                         // is this another sub-entry with the same main entry?
 759                                         if (!eit->same_main(last)) {
 760                                                 // close this level
 761                                                 xs << html::EndTag("ul") << html::CR();
 762                                                 level = 1;
 763                                         }
 764                                 }
 765                                 // again, we can get here two ways: from above, or because we have
 766                                 // found the first sub-entry. in the latter case, we do not want to
 767                                 // close the entry.
 768                                 if (level == 1 && !eit->same_main(last)) {
 769                                         // close entry
 770                                         xs << html::EndTag("li") << html::CR();
 771                                 }
 772                         }
 773
 774                         // we'll be starting new entries
 775                         entry_number = 0;
 776
 777                         // We need to use our own stream, since we will have to
 778                         // modify what we get back.
 779                         odocstringstream ent;
 780                         XHTMLStream entstream(ent);
 781                         OutputParams ours = op;
 782                         ours.for_toc = true;
 783                         par.simpleLyXHTMLOnePar(buffer(), entstream, ours, dummy);
 784
 785                         // these will contain XHTML versions of the main entry, etc
 786                         // remember that everything will already have been escaped,
 787                         // so we'll need to use NextRaw() during output.
 788                         docstring main;
 789                         docstring sub;
 790                         docstring subsub;
 791                         extractSubentries(ent.str(), main, sub, subsub);
 792                         parseItem(main, true);
 793                         parseItem(sub, true);
 794                         parseItem(subsub, true);
 795
 796                         if (level == 3) {
 797                                 // another subsubentry
 798                                 xs << html::StartTag("li", "class='subsubentry'")
 799                                    << XHTMLStream::ESCAPE_NONE << subsub;
 800                         } else if (level == 2) {
 801                                 // there are two ways we can be here:
 802                                 // (i) we can actually be inside a sub-entry already and be about
 803                                 //     to output the first sub-sub-entry. in this case, our sub
 804                                 //     and the last sub will be the same.
 805                                 // (ii) we can just have closed a sub-entry, possibly after also
 806                                 //     closing a list of sub-sub-entries. here our sub and the last
 807                                 //     sub are different.
 808                                 // only in the latter case do we need to output the new sub-entry.
 809                                 // note that in this case, too, though, the sub-entry might already
 810                                 // have a sub-sub-entry.
 811                                 if (eit->sub != last.sub)
 812                                         xs << html::StartTag("li", "class='subentry'")
 813                                            << XHTMLStream::ESCAPE_NONE << sub;
 814                                 if (!subsub.empty()) {
 815                                         // it's actually a subsubentry, so we need to start that list
 816                                         xs << html::CR()
 817                                            << html::StartTag("ul", "class='subsubentry'")
 818                                            << html::StartTag("li", "class='subsubentry'")
 819                                            << XHTMLStream::ESCAPE_NONE << subsub;
 820                                         level = 3;
 821                                 }
 822                         } else {
 823                                 // there are also two ways we can be here:
 824                                 // (i) we can actually be inside an entry already and be about
 825                                 //     to output the first sub-entry. in this case, our main
 826                                 //     and the last main will be the same.
 827                                 // (ii) we can just have closed an entry, possibly after also
 828                                 //     closing a list of sub-entries. here our main and the last
 829                                 //     main are different.
 830                                 // only in the latter case do we need to output the new main entry.
 831                                 // note that in this case, too, though, the main entry might already
 832                                 // have a sub-entry, or even a sub-sub-entry.
 833                                 if (eit->main != last.main)
 834                                         xs << html::StartTag("li", "class='main'") << main;
 835                                 if (!sub.empty()) {
 836                                         // there's a sub-entry, too
 837                                         xs << html::CR()
 838                                            << html::StartTag("ul", "class='subentry'")
 839                                            << html::StartTag("li", "class='subentry'")
 840                                            << XHTMLStream::ESCAPE_NONE << sub;
 841                                         level = 2;
 842                                         if (!subsub.empty()) {
 843                                                 // and a sub-sub-entry
 844                                                 xs << html::CR()
 845                                                    << html::StartTag("ul", "class='subsubentry'")
 846                                                    << html::StartTag("li", "class='subsubentry'")
 847                                                    << XHTMLStream::ESCAPE_NONE << subsub;
 848                                                 level = 3;
 849                                         }
 850                                 }
 851                         }
 852                 }
 853                 // finally, then, we can output the index link itself
 854                 string const parattr = "href='#" + par.magicLabel() + "'";
 855                 xs << (entry_number == 0 ? ":" : ",");
 856                 xs << " " << html::StartTag("a", parattr)
 857                    << ++entry_number << html::EndTag("a");
 858                 last = *eit;
 859         }
 860         // now we have to close all the open levels
 861         while (level > 0) {
 862                 xs << html::EndTag("li") << html::EndTag("ul") << html::CR();
 863                 --level;
 864         }
 865         xs << html::EndTag("div") << html::CR();
 866         return ods.str();
 867 }
 868
 869 } // namespace lyx