src/paragraph_pimpl.C

   1 /**
   2  * \file paragraph_pimpl.C
   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 Jean-Marc Lasgouttes
   8  * \author John Levon
   9  * \author André Pönitz
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "paragraph_pimpl.h"
  17
  18 #include "bufferparams.h"
  19 #include "debug.h"
  20 #include "encoding.h"
  21 #include "language.h"
  22 #include "LaTeXFeatures.h"
  23 #include "latexrunparams.h"
  24 #include "LColor.h"
  25 #include "lyxlength.h"
  26 #include "lyxrc.h"
  27 #include "texrow.h"
  28
  29
  30 using lyx::pos_type;
  31
  32 using std::endl;
  33 using std::upper_bound;
  34
  35 using std::ostream;
  36
  37
  38 // Initialize static member.
  39 ShareContainer<LyXFont> Paragraph::Pimpl::FontTable::container;
  40 // Initialization of the counter for the paragraph id's,
  41 unsigned int Paragraph::Pimpl::paragraph_id = 0;
  42
  43 namespace {
  44
  45 struct special_phrase {
  46         string phrase;
  47         string macro;
  48         bool builtin;
  49 };
  50
  51 special_phrase special_phrases[] = {
  52         { "LyX", "\\LyX{}", false },
  53         { "TeX", "\\TeX{}", true },
  54         { "LaTeX2e", "\\LaTeXe{}", true },
  55         { "LaTeX", "\\LaTeX{}", true },
  56 };
  57
  58 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
  59
  60 } // namespace anon
  61
  62
  63 Paragraph::Pimpl::Pimpl(Paragraph * owner)
  64         : owner_(owner)
  65 {
  66         inset_owner = 0;
  67         id_ = paragraph_id++;
  68 }
  69
  70
  71 Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner)
  72         : params(p.params), owner_(owner)
  73 {
  74         inset_owner = p.inset_owner;
  75         text = p.text;
  76         fontlist = p.fontlist;
  77         id_ = paragraph_id++;
  78
  79         if (p.tracking())
  80                 changes_.reset(new Changes(*p.changes_.get()));
  81 }
  82
  83
  84 void Paragraph::Pimpl::clear()
  85 {
  86         text.clear();
  87 #warning changes ?
  88 }
  89
  90
  91 void Paragraph::Pimpl::setContentsFromPar(Paragraph const & par)
  92 {
  93         text = par.pimpl_->text;
  94         if (par.pimpl_->tracking()) {
  95                 changes_.reset(new Changes(*(par.pimpl_->changes_.get())));
  96         }
  97 }
  98
  99
 100 void Paragraph::Pimpl::trackChanges(Change::Type type)
 101 {
 102         if (tracking()) {
 103                 lyxerr[Debug::CHANGES] << "already tracking for par " << id_ << endl;
 104                 return;
 105         }
 106
 107         lyxerr[Debug::CHANGES] << "track changes for par "
 108                 << id_ << " type " << type << endl;
 109         changes_.reset(new Changes(type));
 110         changes_->set(type, 0, size());
 111 }
 112
 113
 114 void Paragraph::Pimpl::untrackChanges()
 115 {
 116         changes_.reset(0);
 117 }
 118
 119
 120 void Paragraph::Pimpl::cleanChanges()
 121 {
 122         // if we're not tracking, we don't want to reset...
 123         if (!tracking())
 124                 return;
 125
 126         changes_.reset(new Changes(Change::INSERTED));
 127         changes_->set(Change::INSERTED, 0, size());
 128 }
 129
 130
 131 bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
 132 {
 133         if (!tracking())
 134                 return false;
 135
 136         return changes_->isChange(start, end);
 137 }
 138
 139
 140 bool Paragraph::Pimpl::isChangeEdited(pos_type start, pos_type end) const
 141 {
 142         if (!tracking())
 143                 return false;
 144
 145         return changes_->isChangeEdited(start, end);
 146 }
 147
 148
 149 void Paragraph::Pimpl::setChange(pos_type pos, Change::Type type)
 150 {
 151         if (!tracking())
 152                 return;
 153
 154         changes_->set(type, pos);
 155 }
 156
 157
 158 Change::Type Paragraph::Pimpl::lookupChange(pos_type pos) const
 159 {
 160         if (!tracking())
 161                 return Change::UNCHANGED;
 162
 163         return changes_->lookup(pos);
 164 }
 165
 166
 167 Change const Paragraph::Pimpl::lookupChangeFull(pos_type pos) const
 168 {
 169         if (!tracking())
 170                 return Change(Change::UNCHANGED);
 171
 172         return changes_->lookupFull(pos);
 173 }
 174
 175
 176 void Paragraph::Pimpl::markErased()
 177 {
 178         BOOST_ASSERT(tracking());
 179
 180         // FIXME: we should actually remove INSERTED chars.
 181         // difficult because owning insettexts/tabulars need
 182         // to update themselves when rows etc. change
 183         changes_->set(Change::DELETED, 0, size());
 184         changes_->reset(Change::DELETED);
 185 }
 186
 187
 188 void Paragraph::Pimpl::acceptChange(pos_type start, pos_type end)
 189 {
 190         if (!tracking())
 191                 return;
 192
 193         if (!size()) {
 194                 changes_.reset(new Changes(Change::UNCHANGED));
 195                 return;
 196         }
 197
 198         lyxerr << "acceptchange" << endl;
 199         pos_type i = start;
 200
 201         for (; i < end; ++i) {
 202                 switch (lookupChange(i)) {
 203                         case Change::UNCHANGED:
 204                                 break;
 205
 206                         case Change::INSERTED:
 207                                 changes_->set(Change::UNCHANGED, i);
 208                                 break;
 209
 210                         case Change::DELETED:
 211                                 eraseIntern(i);
 212                                 changes_->erase(i);
 213                                 --end;
 214                                 --i;
 215                                 break;
 216                 }
 217         }
 218
 219         lyxerr << "endacceptchange" << endl;
 220         changes_->reset(Change::UNCHANGED);
 221 }
 222
 223
 224 void Paragraph::Pimpl::rejectChange(pos_type start, pos_type end)
 225 {
 226         if (!tracking())
 227                 return;
 228
 229         if (!size()) {
 230                 changes_.reset(new Changes(Change::UNCHANGED));
 231                 return;
 232         }
 233
 234         pos_type i = start;
 235
 236         for (; i < end; ++i) {
 237                 switch (lookupChange(i)) {
 238                         case Change::UNCHANGED:
 239                                 break;
 240
 241                         case Change::INSERTED:
 242                                 eraseIntern(i);
 243                                 changes_->erase(i);
 244                                 --end;
 245                                 --i;
 246                                 break;
 247
 248                         case Change::DELETED:
 249                                 changes_->set(Change::UNCHANGED, i);
 250                                 break;
 251                 }
 252         }
 253         changes_->reset(Change::UNCHANGED);
 254 }
 255
 256
 257 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 258 {
 259 #if 1
 260         // This is in the critical path for loading!
 261         pos_type const siz = size();
 262
 263         BOOST_ASSERT(pos <= siz);
 264
 265         if (pos == siz) {
 266                 lyxerr << "getChar() on pos " << pos << " in par id "
 267                        << owner_->id() << " of size " << siz
 268                        << "  is a bit silly !" << endl;
 269                 return '\0';
 270         }
 271
 272         return text[pos];
 273 #else
 274         BOOST_ASSERT(pos < size());
 275         return text[pos];
 276 #endif
 277 }
 278
 279
 280 void Paragraph::Pimpl::setChar(pos_type pos, value_type c)
 281 {
 282 #warning changes
 283         text[pos] = c;
 284 }
 285
 286
 287 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c,
 288                                   LyXFont const & font, Change change)
 289 {
 290         BOOST_ASSERT(pos <= size());
 291
 292         if (tracking()) {
 293                 changes_->record(change, pos);
 294         }
 295
 296         // This is actually very common when parsing buffers (and
 297         // maybe inserting ascii text)
 298         if (pos == size()) {
 299                 // when appending characters, no need to update tables
 300                 text.push_back(c);
 301                 owner_->setFont(pos, font);
 302                 return;
 303         }
 304
 305         text.insert(text.begin() + pos, c);
 306
 307         // Update the font table.
 308         FontTable search_font(pos, LyXFont());
 309         for (FontList::iterator it = lower_bound(fontlist.begin(),
 310                                                       fontlist.end(),
 311                                                       search_font, matchFT());
 312              it != fontlist.end(); ++it)
 313         {
 314                 it->pos(it->pos() + 1);
 315         }
 316
 317         // Update the insets
 318         owner_->insetlist.increasePosAfterPos(pos);
 319
 320         owner_->setFont(pos, font);
 321 }
 322
 323
 324 void Paragraph::Pimpl::insertInset(pos_type pos,
 325                                    InsetOld * inset, LyXFont const & font, Change change)
 326 {
 327         BOOST_ASSERT(inset);
 328         BOOST_ASSERT(pos <= size());
 329
 330         insertChar(pos, META_INSET, font, change);
 331         BOOST_ASSERT(text[pos] == META_INSET);
 332
 333         // Add a new entry in the insetlist.
 334         owner_->insetlist.insert(inset, pos);
 335
 336         if (inset_owner)
 337                 inset->setOwner(inset_owner);
 338 }
 339
 340
 341 void Paragraph::Pimpl::eraseIntern(pos_type pos)
 342 {
 343         // if it is an inset, delete the inset entry
 344         if (text[pos] == Paragraph::META_INSET) {
 345                 owner_->insetlist.erase(pos);
 346         }
 347
 348         text.erase(text.begin() + pos);
 349
 350         // Erase entries in the tables.
 351         FontTable search_font(pos, LyXFont());
 352
 353         FontList::iterator it =
 354                 lower_bound(fontlist.begin(),
 355                             fontlist.end(),
 356                             search_font, matchFT());
 357         if (it != fontlist.end() && it->pos() == pos &&
 358             (pos == 0 ||
 359              (it != fontlist.begin()
 360               && boost::prior(it)->pos() == pos - 1))) {
 361                 // If it is a multi-character font
 362                 // entry, we just make it smaller
 363                 // (see update below), otherwise we
 364                 // should delete it.
 365                 unsigned int const i = it - fontlist.begin();
 366                 fontlist.erase(fontlist.begin() + i);
 367                 it = fontlist.begin() + i;
 368                 if (i > 0 && i < fontlist.size() &&
 369                     fontlist[i - 1].font() == fontlist[i].font()) {
 370                         fontlist.erase(fontlist.begin() + i - 1);
 371                         it = fontlist.begin() + i - 1;
 372                 }
 373         }
 374
 375         // Update all other entries.
 376         FontList::iterator fend = fontlist.end();
 377         for (; it != fend; ++it)
 378                 it->pos(it->pos() - 1);
 379
 380         // Update the insetlist.
 381         owner_->insetlist.decreasePosAfterPos(pos);
 382 }
 383
 384
 385 bool Paragraph::Pimpl::erase(pos_type pos)
 386 {
 387         BOOST_ASSERT(pos < size());
 388
 389         if (tracking()) {
 390                 Change::Type changetype(changes_->lookup(pos));
 391                 changes_->record(Change(Change::DELETED), pos);
 392
 393                 // only allow the actual removal if it was /new/ text
 394                 if (changetype != Change::INSERTED) {
 395                         if (text[pos] == Paragraph::META_INSET) {
 396                                 InsetOld * i(owner_->getInset(pos));
 397                                 i->markErased();
 398                         }
 399                         return false;
 400                 }
 401         }
 402
 403         eraseIntern(pos);
 404         return true;
 405 }
 406
 407
 408 int Paragraph::Pimpl::erase(pos_type start, pos_type end)
 409 {
 410         pos_type i = start;
 411         pos_type count = end - start;
 412         while (count) {
 413                 if (!erase(i)) {
 414                         ++i;
 415                 }
 416                 --count;
 417         }
 418         return end - i;
 419 }
 420
 421
 422 void Paragraph::Pimpl::simpleTeXBlanks(ostream & os, TexRow & texrow,
 423                                        pos_type const i,
 424                                        unsigned int & column,
 425                                        LyXFont const & font,
 426                                        LyXLayout const & style)
 427 {
 428         if (style.pass_thru)
 429                 return;
 430
 431         if (column > lyxrc.ascii_linelen
 432             && i
 433             && getChar(i - 1) != ' '
 434             && (i < size() - 1)
 435             // same in FreeSpacing mode
 436             && !owner_->isFreeSpacing()
 437             // In typewriter mode, we want to avoid
 438             // ! . ? : at the end of a line
 439             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 440                  && (getChar(i - 1) == '.'
 441                      || getChar(i - 1) == '?'
 442                      || getChar(i - 1) == ':'
 443                      || getChar(i - 1) == '!'))) {
 444                 os << '\n';
 445                 texrow.newline();
 446                 texrow.start(owner_->id(), i + 1);
 447                 column = 0;
 448         } else if (style.free_spacing) {
 449                 os << '~';
 450         } else {
 451                 os << ' ';
 452         }
 453 }
 454
 455
 456 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 457 {
 458         pos_type const len = str.length();
 459
 460         // is the paragraph large enough?
 461         if (pos + len > size())
 462                 return false;
 463
 464         // does the wanted text start at point?
 465         for (string::size_type i = 0; i < str.length(); ++i) {
 466                 if (str[i] != text[pos + i])
 467                         return false;
 468         }
 469
 470         // is there a font change in middle of the word?
 471         FontList::const_iterator cit = fontlist.begin();
 472         FontList::const_iterator end = fontlist.end();
 473         for (; cit != end; ++cit) {
 474                 if (cit->pos() >= pos)
 475                         break;
 476         }
 477         if (cit != end && pos + len - 1 > cit->pos())
 478                 return false;
 479
 480         return true;
 481 }
 482
 483
 484 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 485                                              BufferParams const & bparams,
 486                                              ostream & os,
 487                                              TexRow & texrow,
 488                                              LatexRunParams const & runparams,
 489                                              LyXFont & font,
 490                                              LyXFont & running_font,
 491                                              LyXFont & basefont,
 492                                              LyXFont const & outerfont,
 493                                              bool & open_font,
 494                                              Change::Type & running_change,
 495                                              LyXLayout const & style,
 496                                              pos_type & i,
 497                                              unsigned int & column,
 498                                              value_type const c)
 499 {
 500         if (style.pass_thru) {
 501                 if (c != Paragraph::META_INSET) {
 502                         if (c != '\0')
 503                                 os << c;
 504                 } else {
 505                         InsetOld const * inset = owner_->getInset(i);
 506                         inset->ascii(buf, os, 0);
 507                 }
 508                 return;
 509         }
 510
 511         // Two major modes:  LaTeX or plain
 512         // Handle here those cases common to both modes
 513         // and then split to handle the two modes separately.
 514         switch (c) {
 515         case Paragraph::META_INSET: {
 516                 InsetOld * inset = owner_->getInset(i);
 517
 518                 // FIXME: remove this check
 519                 if (!inset)
 520                         break;
 521
 522                 // FIXME: move this to InsetNewline::latex
 523                 if (inset->lyxCode() == InsetOld::NEWLINE_CODE) {
 524                         // newlines are handled differently here than
 525                         // the default in simpleTeXSpecialChars().
 526                         if (!style.newline_allowed) {
 527                                 os << '\n';
 528                         } else {
 529                                 if (open_font) {
 530                                         column += running_font.latexWriteEndChanges(os, basefont, basefont);
 531                                         open_font = false;
 532                                 }
 533                                 basefont = owner_->getLayoutFont(bparams, outerfont);
 534                                 running_font = basefont;
 535
 536                                 if (font.family() == LyXFont::TYPEWRITER_FAMILY)
 537                                         os << '~';
 538
 539                                 if (runparams.moving_arg)
 540                                         os << "\\protect ";
 541
 542                                 os << "\\\\\n";
 543                         }
 544                         texrow.newline();
 545                         texrow.start(owner_->id(), i + 1);
 546                         column = 0;
 547                         break;
 548                 }
 549
 550                 if (inset->isTextInset()) {
 551                         column += Changes::latexMarkChange(os, running_change,
 552                                 Change::UNCHANGED);
 553                         running_change = Change::UNCHANGED;
 554                 }
 555
 556                 bool close = false;
 557                 int const len = os.tellp();
 558                 //ostream::pos_type const len = os.tellp();
 559                 if ((inset->lyxCode() == InsetOld::GRAPHICS_CODE
 560                      || inset->lyxCode() == InsetOld::MATH_CODE
 561                      || inset->lyxCode() == InsetOld::URL_CODE)
 562                     && running_font.isRightToLeft()) {
 563                         os << "\\L{";
 564                         close = true;
 565                 }
 566
 567 #ifdef WITH_WARNINGS
 568 #warning Bug: we can have an empty font change here!
 569 // if there has just been a font change, we are going to close it
 570 // right now, which means stupid latex code like \textsf{}. AFAIK,
 571 // this does not harm dvi output. A minor bug, thus (JMarc)
 572 #endif
 573                 // some insets cannot be inside a font change command
 574                 if (open_font && inset->noFontChange()) {
 575                         column +=running_font.
 576                                 latexWriteEndChanges(os,
 577                                                      basefont,
 578                                                      basefont);
 579                         open_font = false;
 580                         basefont = owner_->getLayoutFont(bparams, outerfont);
 581                         running_font = basefont;
 582                 }
 583
 584                 int tmp = inset->latex(buf, os, runparams);
 585
 586                 if (close)
 587                         os << '}';
 588
 589                 if (tmp) {
 590                         for (int j = 0; j < tmp; ++j) {
 591                                 texrow.newline();
 592                         }
 593                         texrow.start(owner_->id(), i + 1);
 594                         column = 0;
 595                 } else {
 596                         column += int(os.tellp()) - len;
 597                 }
 598         }
 599         break;
 600
 601         default:
 602                 // And now for the special cases within each mode
 603
 604                 switch (c) {
 605                 case '\\':
 606                         os << "\\textbackslash{}";
 607                         column += 15;
 608                         break;
 609
 610                 case '±': case '²': case '³':
 611                 case '×': case '÷': case '¹':
 612                 case '¬': case 'µ':
 613                         if ((bparams.inputenc == "latin1" ||
 614                              bparams.inputenc == "latin9") ||
 615                             (bparams.inputenc == "auto" &&
 616                              (font.language()->encoding()->LatexName()
 617                               == "latin1" ||
 618                               font.language()->encoding()->LatexName()
 619                               == "latin9"))) {
 620                                 os << "\\ensuremath{"
 621                                    << c
 622                                    << '}';
 623                                 column += 13;
 624                         } else {
 625                                 os << c;
 626                         }
 627                         break;
 628
 629                 case '|': case '<': case '>':
 630                         // In T1 encoding, these characters exist
 631                         if (lyxrc.fontenc == "T1") {
 632                                 os << c;
 633                                 //... but we should avoid ligatures
 634                                 if ((c == '>' || c == '<')
 635                                     && i <= size() - 2
 636                                     && getChar(i + 1) == c) {
 637                                         //os << "\\textcompwordmark{}";
 638                                         // Jean-Marc, have a look at
 639                                         // this. I think this works
 640                                         // equally well:
 641                                         os << "\\,{}";
 642                                         // Lgb
 643                                         column += 19;
 644                                 }
 645                                 break;
 646                         }
 647                         // Typewriter font also has them
 648                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 649                                 os << c;
 650                                 break;
 651                         }
 652                         // Otherwise, we use what LaTeX
 653                         // provides us.
 654                         switch (c) {
 655                         case '<':
 656                                 os << "\\textless{}";
 657                                 column += 10;
 658                                 break;
 659                         case '>':
 660                                 os << "\\textgreater{}";
 661                                 column += 13;
 662                                 break;
 663                         case '|':
 664                                 os << "\\textbar{}";
 665                                 column += 9;
 666                                 break;
 667                         }
 668                         break;
 669
 670                 case '-': // "--" in Typewriter mode -> "-{}-"
 671                         if (i <= size() - 2
 672                             && getChar(i + 1) == '-'
 673                             && font.family() == LyXFont::TYPEWRITER_FAMILY) {
 674                                 os << "-{}";
 675                                 column += 2;
 676                         } else {
 677                                 os << '-';
 678                         }
 679                         break;
 680
 681                 case '\"':
 682                         os << "\\char`\\\"{}";
 683                         column += 9;
 684                         break;
 685
 686                 case '£':
 687                         if (bparams.inputenc == "default") {
 688                                 os << "\\pounds{}";
 689                                 column += 8;
 690                         } else {
 691                                 os << c;
 692                         }
 693                         break;
 694
 695                 case '$': case '&':
 696                 case '%': case '#': case '{':
 697                 case '}': case '_':
 698                         os << '\\' << c;
 699                         column += 1;
 700                         break;
 701
 702                 case '~':
 703                         os << "\\textasciitilde{}";
 704                         column += 16;
 705                         break;
 706
 707                 case '^':
 708                         os << "\\textasciicircum{}";
 709                         column += 17;
 710                         break;
 711
 712                 case '*': case '[': case ']':
 713                         // avoid being mistaken for optional arguments
 714                         os << '{' << c << '}';
 715                         column += 2;
 716                         break;
 717
 718                 case ' ':
 719                         // Blanks are printed before font switching.
 720                         // Sure? I am not! (try nice-latex)
 721                         // I am sure it's correct. LyX might be smarter
 722                         // in the future, but for now, nothing wrong is
 723                         // written. (Asger)
 724                         break;
 725
 726                 default:
 727
 728                         // I assume this is hack treating typewriter as verbatim
 729                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 730                                 if (c != '\0') {
 731                                         os << c;
 732                                 }
 733                                 break;
 734                         }
 735
 736                         // LyX, LaTeX etc.
 737
 738                         // FIXME: if we have "LaTeX" with a font
 739                         // change in the middle (before the 'T', then
 740                         // the "TeX" part is still special cased.
 741                         // Really we should only operate this on
 742                         // "words" for some definition of word
 743
 744                         size_t pnr = 0;
 745
 746                         for (; pnr < phrases_nr; ++pnr) {
 747                                 if (isTextAt(special_phrases[pnr].phrase, i)) {
 748                                         os << special_phrases[pnr].macro;
 749                                         i += special_phrases[pnr].phrase.length() - 1;
 750                                         column += special_phrases[pnr].macro.length() - 1;
 751                                         break;
 752                                 }
 753                         }
 754
 755                         if (pnr == phrases_nr && c != '\0') {
 756                                 os << c;
 757                         }
 758                         break;
 759                 }
 760         }
 761 }
 762
 763
 764 void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 765                                 LyXLayout const & layout) const
 766 {
 767         BufferParams const & bparams = features.bufferParams();
 768
 769         // check the params.
 770         if (params.lineTop() || params.lineBottom())
 771                 features.require("lyxline");
 772         if (!params.spacing().isDefault())
 773                 features.require("setspace");
 774
 775         // then the layouts
 776         features.useLayout(layout.name());
 777
 778         // then the fonts
 779         Language const * doc_language = bparams.language;
 780
 781         FontList::const_iterator fcit = fontlist.begin();
 782         FontList::const_iterator fend = fontlist.end();
 783         for (; fcit != fend; ++fcit) {
 784                 if (fcit->font().noun() == LyXFont::ON) {
 785                         lyxerr[Debug::LATEX] << "font.noun: "
 786                                              << fcit->font().noun()
 787                                              << endl;
 788                         features.require("noun");
 789                         lyxerr[Debug::LATEX] << "Noun enabled. Font: "
 790                                              << fcit->font().stateText(0)
 791                                              << endl;
 792                 }
 793                 switch (fcit->font().color()) {
 794                 case LColor::none:
 795                 case LColor::inherit:
 796                 case LColor::ignore:
 797                         // probably we should put here all interface colors used for
 798                         // font displaying! For now I just add this ones I know of (Jug)
 799                 case LColor::latex:
 800                 case LColor::note:
 801                         break;
 802                 default:
 803                         features.require("color");
 804                         lyxerr[Debug::LATEX] << "Color enabled. Font: "
 805                                              << fcit->font().stateText(0)
 806                                              << endl;
 807                 }
 808
 809                 Language const * language = fcit->font().language();
 810                 if (language->babel() != doc_language->babel() &&
 811                     language != ignore_language &&
 812                     language != latex_language)
 813                 {
 814                         features.useLanguage(language);
 815                         lyxerr[Debug::LATEX] << "Found language "
 816                                              << language->babel() << endl;
 817                 }
 818         }
 819
 820         if (!params.leftIndent().zero())
 821                 features.require("ParagraphLeftIndent");
 822
 823         // then the insets
 824         InsetList::iterator icit = owner_->insetlist.begin();
 825         InsetList::iterator iend = owner_->insetlist.end();
 826         for (; icit != iend; ++icit) {
 827                 if (icit->inset) {
 828                         icit->inset->validate(features);
 829                         if (layout.needprotect &&
 830                             icit->inset->lyxCode() == InsetOld::FOOT_CODE)
 831                                 features.require("NeedLyXFootnoteCode");
 832                 }
 833         }
 834
 835         // then the contents
 836         for (pos_type i = 0; i < size() ; ++i) {
 837                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 838                         if (!special_phrases[pnr].builtin
 839                             && isTextAt(special_phrases[pnr].phrase, i)) {
 840                                 features.require(special_phrases[pnr].phrase);
 841                                 break;
 842                         }
 843                 }
 844         }
 845 }