src/paragraph_pimpl.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2001 The LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12
  13 #include "paragraph_pimpl.h"
  14 #include "LaTeXFeatures.h"
  15 #include "texrow.h"
  16 #include "language.h"
  17 #include "bufferparams.h"
  18 #include "encoding.h"
  19 #include "lyxrc.h"
  20 #include "debug.h"
  21 #include "paragraph_funcs.h"
  22
  23 #include "support/LAssert.h"
  24
  25 using lyx::pos_type;
  26 using std::endl;
  27 using std::ostream;
  28 using std::upper_bound;
  29 using std::lower_bound;
  30
  31 // Initialize static member.
  32 ShareContainer<LyXFont> Paragraph::Pimpl::FontTable::container;
  33 // Initialization of the counter for the paragraph id's,
  34 unsigned int Paragraph::Pimpl::paragraph_id = 0;
  35
  36 namespace {
  37
  38 struct special_phrase {
  39         string phrase;
  40         string macro;
  41         bool builtin;
  42 };
  43
  44 special_phrase special_phrases[] = {
  45         { "LyX", "\\LyX{}", false },
  46         { "TeX", "\\TeX{}", true },
  47         { "LaTeX2e", "\\LaTeXe{}", true },
  48         { "LaTeX", "\\LaTeX{}", true },
  49 };
  50
  51 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
  52
  53 } // namespace anon
  54
  55
  56 Paragraph::Pimpl::Pimpl(Paragraph * owner)
  57         : owner_(owner)
  58 {
  59         inset_owner = 0;
  60         id_ = paragraph_id++;
  61 }
  62
  63
  64 Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner, bool same_ids)
  65         : params(p.params), owner_(owner)
  66 {
  67         inset_owner = p.inset_owner;
  68         text = p.text;
  69         fontlist = p.fontlist;
  70         if (same_ids)
  71                 id_ = p.id_;
  72         else
  73                 id_ = paragraph_id++;
  74
  75         if (p.tracking())
  76                 changes_.reset(new Changes(*p.changes_.get()));
  77 }
  78
  79
  80 void Paragraph::Pimpl::clear()
  81 {
  82         text.clear();
  83 #warning changes ?
  84 }
  85
  86
  87 void Paragraph::Pimpl::setContentsFromPar(Paragraph const * par)
  88 {
  89         lyx::Assert(par);
  90         text = par->pimpl_->text;
  91         if (par->pimpl_->tracking()) {
  92                 changes_.reset(new Changes(*(par->pimpl_->changes_.get())));
  93         }
  94 }
  95
  96
  97 void Paragraph::Pimpl::trackChanges(Change::Type type)
  98 {
  99         if (tracking()) {
 100                 lyxerr[Debug::CHANGES] << "already tracking for par " << id_ << endl;
 101                 return;
 102         }
 103
 104         lyxerr[Debug::CHANGES] << "track changes for par "
 105                 << id_ << " type " << type << endl;
 106         changes_.reset(new Changes(type));
 107         changes_->set(type, 0, size());
 108 }
 109
 110
 111 void Paragraph::Pimpl::untrackChanges()
 112 {
 113         changes_.reset(0);
 114 }
 115
 116
 117 void Paragraph::Pimpl::cleanChanges()
 118 {
 119         // if we're not tracking, we don't want to reset...
 120         if (!tracking())
 121                 return;
 122
 123         changes_.reset(new Changes(Change::INSERTED));
 124         changes_->set(Change::INSERTED, 0, size());
 125 }
 126
 127
 128 bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
 129 {
 130         if (!tracking())
 131                 return false;
 132
 133         return changes_->isChange(start, end);
 134 }
 135
 136
 137 bool Paragraph::Pimpl::isChangeEdited(pos_type start, pos_type end) const
 138 {
 139         if (!tracking())
 140                 return false;
 141
 142         return changes_->isChangeEdited(start, end);
 143 }
 144
 145
 146 void Paragraph::Pimpl::setChange(pos_type pos, Change::Type type)
 147 {
 148         if (!tracking())
 149                 return;
 150
 151         changes_->set(type, pos);
 152 }
 153
 154
 155 Change::Type Paragraph::Pimpl::lookupChange(pos_type pos) const
 156 {
 157         if (!tracking())
 158                 return Change::UNCHANGED;
 159
 160         return changes_->lookup(pos);
 161 }
 162
 163
 164 Change const Paragraph::Pimpl::lookupChangeFull(pos_type pos) const
 165 {
 166         if (!tracking())
 167                 return Change(Change::UNCHANGED);
 168
 169         return changes_->lookupFull(pos);
 170 }
 171
 172
 173 void Paragraph::Pimpl::markErased()
 174 {
 175         lyx::Assert(tracking());
 176
 177         // FIXME: we should actually remove INSERTED chars.
 178         // difficult because owning insettexts/tabulars need
 179         // to update themselves when rows etc. change
 180         changes_->set(Change::DELETED, 0, size());
 181         changes_->reset(Change::DELETED);
 182 }
 183
 184
 185 void Paragraph::Pimpl::acceptChange(pos_type start, pos_type end)
 186 {
 187         if (!tracking())
 188                 return;
 189
 190         if (!size()) {
 191                 changes_.reset(new Changes(Change::UNCHANGED));
 192                 return;
 193         }
 194
 195         lyxerr << "acceptchange" << endl;
 196         pos_type i = start;
 197
 198         for (; i < end; ++i) {
 199                 switch (lookupChange(i)) {
 200                         case Change::UNCHANGED:
 201                                 break;
 202
 203                         case Change::INSERTED:
 204                                 changes_->set(Change::UNCHANGED, i);
 205                                 break;
 206
 207                         case Change::DELETED:
 208                                 eraseIntern(i);
 209                                 changes_->erase(i);
 210                                 --end;
 211                                 --i;
 212                                 break;
 213                 }
 214         }
 215
 216         lyxerr << "endacceptchange" << endl;
 217         changes_->reset(Change::UNCHANGED);
 218 }
 219
 220
 221 void Paragraph::Pimpl::rejectChange(pos_type start, pos_type end)
 222 {
 223         if (!tracking())
 224                 return;
 225
 226         if (!size()) {
 227                 changes_.reset(new Changes(Change::UNCHANGED));
 228                 return;
 229         }
 230
 231         pos_type i = start;
 232
 233         for (; i < end; ++i) {
 234                 switch (lookupChange(i)) {
 235                         case Change::UNCHANGED:
 236                                 break;
 237
 238                         case Change::INSERTED:
 239                                 eraseIntern(i);
 240                                 changes_->erase(i);
 241                                 --end;
 242                                 --i;
 243                                 break;
 244
 245                         case Change::DELETED:
 246                                 changes_->set(Change::UNCHANGED, i);
 247                                 break;
 248                 }
 249         }
 250         changes_->reset(Change::UNCHANGED);
 251 }
 252
 253
 254 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 255 {
 256 #if 1
 257         // This is in the critical path for loading!
 258         pos_type const siz = size();
 259
 260         lyx::Assert(pos <= siz);
 261
 262         if (pos == siz) {
 263                 lyxerr << "getChar() on pos " << pos << " in par id "
 264                        << owner_->id() << " of size " << siz
 265                        << "  is a bit silly !" << endl;
 266                 return '\0';
 267         }
 268
 269         return text[pos];
 270 #else
 271         lyx::Assert(pos < size());
 272         return text[pos];
 273 #endif
 274 }
 275
 276
 277 void Paragraph::Pimpl::setChar(pos_type pos, value_type c)
 278 {
 279 #warning changes
 280         text[pos] = c;
 281 }
 282
 283
 284 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c,
 285                                   LyXFont const & font, Change change)
 286 {
 287         lyx::Assert(pos <= size());
 288
 289         if (tracking()) {
 290                 changes_->record(change, pos);
 291         }
 292
 293         // This is actually very common when parsing buffers (and
 294         // maybe inserting ascii text)
 295         if (pos == size()) {
 296                 // when appending characters, no need to update tables
 297                 text.push_back(c);
 298                 owner_->setFont(pos, font);
 299                 return;
 300         }
 301
 302         text.insert(text.begin() + pos, c);
 303
 304         // Update the font table.
 305         FontTable search_font(pos, LyXFont());
 306         for (FontList::iterator it = lower_bound(fontlist.begin(),
 307                                                       fontlist.end(),
 308                                                       search_font, matchFT());
 309              it != fontlist.end(); ++it)
 310         {
 311                 it->pos(it->pos() + 1);
 312         }
 313
 314         // Update the insets
 315         owner_->insetlist.increasePosAfterPos(pos);
 316
 317         owner_->setFont(pos, font);
 318 }
 319
 320
 321 void Paragraph::Pimpl::insertInset(pos_type pos,
 322                                    Inset * inset, LyXFont const & font, Change change)
 323 {
 324         lyx::Assert(inset);
 325         lyx::Assert(pos <= size());
 326
 327         insertChar(pos, META_INSET, font, change);
 328         lyx::Assert(text[pos] == META_INSET);
 329
 330         // Add a new entry in the insetlist.
 331         owner_->insetlist.insert(inset, pos);
 332         inset->parOwner(owner_);
 333
 334         if (inset_owner)
 335                 inset->setOwner(inset_owner);
 336 }
 337
 338
 339 bool Paragraph::Pimpl::erasePos(pos_type pos)
 340 {
 341         lyx::Assert(pos < size());
 342
 343         if (tracking()) {
 344                 Change::Type changetype(changes_->lookup(pos));
 345                 changes_->record(Change(Change::DELETED), pos);
 346
 347                 // only allow the actual removal if it was /new/ text
 348                 if (changetype != Change::INSERTED) {
 349                         if (text[pos] == Paragraph::META_INSET) {
 350                                 Inset * i(owner_->getInset(pos));
 351                                 i->markErased();
 352                         }
 353                         return false;
 354                 }
 355         }
 356
 357         eraseIntern(pos);
 358         return true;
 359 }
 360
 361
 362 void Paragraph::Pimpl::eraseIntern(pos_type pos)
 363 {
 364         // if it is an inset, delete the inset entry
 365         if (text[pos] == Paragraph::META_INSET) {
 366                 owner_->insetlist.erase(pos);
 367         }
 368
 369         text.erase(text.begin() + pos);
 370
 371         // Erase entries in the tables.
 372         FontTable search_font(pos, LyXFont());
 373
 374         FontList::iterator it =
 375                 lower_bound(fontlist.begin(),
 376                             fontlist.end(),
 377                             search_font, matchFT());
 378         if (it != fontlist.end() && it->pos() == pos &&
 379             (pos == 0 ||
 380              (it != fontlist.begin()
 381               && boost::prior(it)->pos() == pos - 1))) {
 382                 // If it is a multi-character font
 383                 // entry, we just make it smaller
 384                 // (see update below), otherwise we
 385                 // should delete it.
 386                 unsigned int const i = it - fontlist.begin();
 387                 fontlist.erase(fontlist.begin() + i);
 388                 it = fontlist.begin() + i;
 389                 if (i > 0 && i < fontlist.size() &&
 390                     fontlist[i - 1].font() == fontlist[i].font()) {
 391                         fontlist.erase(fontlist.begin() + i - 1);
 392                         it = fontlist.begin() + i - 1;
 393                 }
 394         }
 395
 396         // Update all other entries.
 397         FontList::iterator fend = fontlist.end();
 398         for (; it != fend; ++it)
 399                 it->pos(it->pos() - 1);
 400
 401         // Update the insetlist.
 402         owner_->insetlist.decreasePosAfterPos(pos);
 403 }
 404
 405
 406 void Paragraph::Pimpl::erase(pos_type pos)
 407 {
 408         erasePos(pos);
 409 }
 410
 411
 412 bool Paragraph::Pimpl::erase(pos_type start, pos_type end)
 413 {
 414         pos_type i = start;
 415         pos_type count = end - start;
 416         bool any_erased = false;
 417
 418         while (count) {
 419                 if (!erasePos(i)) {
 420                         ++i;
 421                 } else {
 422                         any_erased = true;
 423                 }
 424                 --count;
 425         }
 426         return any_erased;
 427 }
 428
 429
 430 void Paragraph::Pimpl::simpleTeXBlanks(ostream & os, TexRow & texrow,
 431                                        pos_type const i,
 432                                        unsigned int & column,
 433                                        LyXFont const & font,
 434                                        LyXLayout const & style)
 435 {
 436         if (style.pass_thru)
 437                 return;
 438
 439         if (column > lyxrc.ascii_linelen
 440             && i
 441             && getChar(i - 1) != ' '
 442             && (i < size() - 1)
 443             // same in FreeSpacing mode
 444             && !style.free_spacing
 445                 && !owner_->isFreeSpacing()
 446             // In typewriter mode, we want to avoid
 447             // ! . ? : at the end of a line
 448             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 449                  && (getChar(i - 1) == '.'
 450                      || getChar(i - 1) == '?'
 451                      || getChar(i - 1) == ':'
 452                      || getChar(i - 1) == '!'))) {
 453                 os << '\n';
 454                 texrow.newline();
 455                 texrow.start(owner_, i + 1);
 456                 column = 0;
 457         } else if (style.free_spacing) {
 458                 os << '~';
 459         } else {
 460                 os << ' ';
 461         }
 462 }
 463
 464
 465 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 466 {
 467         pos_type const len = str.length();
 468
 469         // is the paragraph large enough?
 470         if (pos + len > size())
 471                 return false;
 472
 473         // does the wanted text start at point?
 474         for (string::size_type i = 0; i < str.length(); ++i) {
 475                 if (str[i] != text[pos + i])
 476                         return false;
 477         }
 478
 479         // is there a font change in middle of the word?
 480         FontList::const_iterator cit = fontlist.begin();
 481         FontList::const_iterator end = fontlist.end();
 482         for (; cit != end; ++cit) {
 483                 if (cit->pos() >= pos)
 484                         break;
 485         }
 486         if (cit != end && pos + len - 1 > cit->pos())
 487                 return false;
 488
 489         return true;
 490 }
 491
 492
 493 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const * buf,
 494                                              BufferParams const & bparams,
 495                                              ostream & os,
 496                                              TexRow & texrow,
 497                                              bool moving_arg,
 498                                              LyXFont & font,
 499                                              LyXFont & running_font,
 500                                              LyXFont & basefont,
 501                                              LyXFont const & outerfont,
 502                                              bool & open_font,
 503                                              Change::Type & running_change,
 504                                              LyXLayout const & style,
 505                                              pos_type & i,
 506                                              unsigned int & column,
 507                                              value_type const c)
 508 {
 509         if (style.pass_thru) {
 510                 if (c != Paragraph::META_INSET) {
 511                         if (c != '\0')
 512                                 os << c;
 513                 } else {
 514                         Inset const * inset = owner_->getInset(i);
 515                         inset->ascii(buf, os, 0);
 516                 }
 517                 return;
 518         }
 519
 520         // Two major modes:  LaTeX or plain
 521         // Handle here those cases common to both modes
 522         // and then split to handle the two modes separately.
 523         switch (c) {
 524         case Paragraph::META_INSET: {
 525                 Inset * inset = owner_->getInset(i);
 526
 527                 // FIXME: remove this check
 528                 if (!inset)
 529                         break;
 530
 531                 // FIXME: move this to InsetNewline::latex
 532                 if (inset->lyxCode() == Inset::NEWLINE_CODE) {
 533                         // newlines are handled differently here than
 534                         // the default in simpleTeXSpecialChars().
 535                         if (!style.newline_allowed) {
 536                                 os << '\n';
 537                         } else {
 538                                 if (open_font) {
 539                                         column += running_font.latexWriteEndChanges(os, basefont, basefont);
 540                                         open_font = false;
 541                                 }
 542                                 basefont = owner_->getLayoutFont(bparams, outerfont);
 543                                 running_font = basefont;
 544
 545                                 if (font.family() == LyXFont::TYPEWRITER_FAMILY)
 546                                         os << '~';
 547
 548                                 if (moving_arg)
 549                                         os << "\\protect ";
 550
 551                                 os << "\\\\\n";
 552                         }
 553                         texrow.newline();
 554                         texrow.start(owner_, i + 1);
 555                         column = 0;
 556                         break;
 557                 }
 558
 559                 if (inset->isTextInset()) {
 560                         column += Changes::latexMarkChange(os, running_change,
 561                                 Change::UNCHANGED);
 562                         running_change = Change::UNCHANGED;
 563                 }
 564
 565                 bool close = false;
 566                 int const len = os.tellp();
 567                 //ostream::pos_type const len = os.tellp();
 568                 if ((inset->lyxCode() == Inset::GRAPHICS_CODE
 569                      || inset->lyxCode() == Inset::MATH_CODE
 570                      || inset->lyxCode() == Inset::URL_CODE)
 571                     && running_font.isRightToLeft()) {
 572                         os << "\\L{";
 573                         close = true;
 574                 }
 575
 576 #ifdef WITH_WARNINGS
 577 #warning Bug: we can have an empty font change here!
 578 // if there has just been a font change, we are going to close it
 579 // right now, which means stupid latex code like \textsf{}. AFAIK,
 580 // this does not harm dvi output. A minor bug, thus (JMarc)
 581 #endif
 582                 // some insets cannot be inside a font change command
 583                 if (open_font && inset->noFontChange()) {
 584                         column +=running_font.
 585                                 latexWriteEndChanges(os,
 586                                                      basefont,
 587                                                      basefont);
 588                         open_font = false;
 589                         basefont = owner_->getLayoutFont(bparams, outerfont);
 590                         running_font = basefont;
 591                 }
 592
 593                 int tmp = inset->latex(buf, os, moving_arg,
 594                                        style.free_spacing);
 595
 596                 if (close)
 597                         os << '}';
 598
 599                 if (tmp) {
 600                         for (int j = 0; j < tmp; ++j) {
 601                                 texrow.newline();
 602                         }
 603                         texrow.start(owner_, i + 1);
 604                         column = 0;
 605                 } else {
 606                         column += int(os.tellp()) - len;
 607                 }
 608         }
 609         break;
 610
 611         default:
 612                 // And now for the special cases within each mode
 613
 614                 switch (c) {
 615                 case '\\':
 616                         os << "\\textbackslash{}";
 617                         column += 15;
 618                         break;
 619
 620                 case '±': case '²': case '³':
 621                 case '×': case '÷': case '¹':
 622                 case '¬': case 'µ':
 623                         if ((bparams.inputenc == "latin1" ||
 624                              bparams.inputenc == "latin9") ||
 625                             (bparams.inputenc == "auto" &&
 626                              (font.language()->encoding()->LatexName()
 627                               == "latin1" ||
 628                               font.language()->encoding()->LatexName()
 629                               == "latin9"))) {
 630                                 os << "\\ensuremath{"
 631                                    << c
 632                                    << '}';
 633                                 column += 13;
 634                         } else {
 635                                 os << c;
 636                         }
 637                         break;
 638
 639                 case '|': case '<': case '>':
 640                         // In T1 encoding, these characters exist
 641                         if (lyxrc.fontenc == "T1") {
 642                                 os << c;
 643                                 //... but we should avoid ligatures
 644                                 if ((c == '>' || c == '<')
 645                                     && i <= size() - 2
 646                                     && getChar(i + 1) == c) {
 647                                         //os << "\\textcompwordmark{}";
 648                                         // Jean-Marc, have a look at
 649                                         // this. I think this works
 650                                         // equally well:
 651                                         os << "\\,{}";
 652                                         // Lgb
 653                                         column += 19;
 654                                 }
 655                                 break;
 656                         }
 657                         // Typewriter font also has them
 658                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 659                                 os << c;
 660                                 break;
 661                         }
 662                         // Otherwise, we use what LaTeX
 663                         // provides us.
 664                         switch (c) {
 665                         case '<':
 666                                 os << "\\textless{}";
 667                                 column += 10;
 668                                 break;
 669                         case '>':
 670                                 os << "\\textgreater{}";
 671                                 column += 13;
 672                                 break;
 673                         case '|':
 674                                 os << "\\textbar{}";
 675                                 column += 9;
 676                                 break;
 677                         }
 678                         break;
 679
 680                 case '-': // "--" in Typewriter mode -> "-{}-"
 681                         if (i <= size() - 2
 682                             && getChar(i + 1) == '-'
 683                             && font.family() == LyXFont::TYPEWRITER_FAMILY) {
 684                                 os << "-{}";
 685                                 column += 2;
 686                         } else {
 687                                 os << '-';
 688                         }
 689                         break;
 690
 691                 case '\"':
 692                         os << "\\char`\\\"{}";
 693                         column += 9;
 694                         break;
 695
 696                 case '£':
 697                         if (bparams.inputenc == "default") {
 698                                 os << "\\pounds{}";
 699                                 column += 8;
 700                         } else {
 701                                 os << c;
 702                         }
 703                         break;
 704
 705                 case '$': case '&':
 706                 case '%': case '#': case '{':
 707                 case '}': case '_':
 708                         os << '\\' << c;
 709                         column += 1;
 710                         break;
 711
 712                 case '~':
 713                         os << "\\textasciitilde{}";
 714                         column += 16;
 715                         break;
 716
 717                 case '^':
 718                         os << "\\textasciicircum{}";
 719                         column += 17;
 720                         break;
 721
 722                 case '*': case '[': case ']':
 723                         // avoid being mistaken for optional arguments
 724                         os << '{' << c << '}';
 725                         column += 2;
 726                         break;
 727
 728                 case ' ':
 729                         // Blanks are printed before font switching.
 730                         // Sure? I am not! (try nice-latex)
 731                         // I am sure it's correct. LyX might be smarter
 732                         // in the future, but for now, nothing wrong is
 733                         // written. (Asger)
 734                         break;
 735
 736                 default:
 737
 738                         // I assume this is hack treating typewriter as verbatim
 739                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 740                                 if (c != '\0') {
 741                                         os << c;
 742                                 }
 743                                 break;
 744                         }
 745
 746                         // LyX, LaTeX etc.
 747
 748                         // FIXME: if we have "LaTeX" with a font
 749                         // change in the middle (before the 'T', then
 750                         // the "TeX" part is still special cased.
 751                         // Really we should only operate this on
 752                         // "words" for some definition of word
 753
 754                         size_t pnr = 0;
 755
 756                         for (; pnr < phrases_nr; ++pnr) {
 757                                 if (isTextAt(special_phrases[pnr].phrase, i)) {
 758                                         os << special_phrases[pnr].macro;
 759                                         i += special_phrases[pnr].phrase.length() - 1;
 760                                         column += special_phrases[pnr].macro.length() - 1;
 761                                         break;
 762                                 }
 763                         }
 764
 765                         if (pnr == phrases_nr && c != '\0') {
 766                                 os << c;
 767                         }
 768                         break;
 769                 }
 770         }
 771 }
 772
 773
 774 void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 775                                 LyXLayout const & layout) const
 776 {
 777         BufferParams const & bparams = features.bufferParams();
 778
 779         // check the params.
 780         if (params.lineTop() || params.lineBottom())
 781                 features.require("lyxline");
 782         if (!params.spacing().isDefault())
 783                 features.require("setspace");
 784
 785         // then the layouts
 786         features.useLayout(layout.name());
 787
 788         // then the fonts
 789         Language const * doc_language = bparams.language;
 790
 791         FontList::const_iterator fcit = fontlist.begin();
 792         FontList::const_iterator fend = fontlist.end();
 793         for (; fcit != fend; ++fcit) {
 794                 if (fcit->font().noun() == LyXFont::ON) {
 795                         lyxerr[Debug::LATEX] << "font.noun: "
 796                                              << fcit->font().noun()
 797                                              << endl;
 798                         features.require("noun");
 799                         lyxerr[Debug::LATEX] << "Noun enabled. Font: "
 800                                              << fcit->font().stateText(0)
 801                                              << endl;
 802                 }
 803                 switch (fcit->font().color()) {
 804                 case LColor::none:
 805                 case LColor::inherit:
 806                 case LColor::ignore:
 807                         // probably we should put here all interface colors used for
 808                         // font displaying! For now I just add this ones I know of (Jug)
 809                 case LColor::latex:
 810                 case LColor::note:
 811                         break;
 812                 default:
 813                         features.require("color");
 814                         lyxerr[Debug::LATEX] << "Color enabled. Font: "
 815                                              << fcit->font().stateText(0)
 816                                              << endl;
 817                 }
 818
 819                 Language const * language = fcit->font().language();
 820                 if (language->babel() != doc_language->babel() &&
 821                     language != ignore_language &&
 822                     language != latex_language)
 823                 {
 824                         features.useLanguage(language);
 825                         lyxerr[Debug::LATEX] << "Found language "
 826                                              << language->babel() << endl;
 827                 }
 828         }
 829
 830         if (!params.leftIndent().zero())
 831                 features.require("ParagraphLeftIndent");
 832
 833         // then the insets
 834         InsetList::iterator icit = owner_->insetlist.begin();
 835         InsetList::iterator iend = owner_->insetlist.end();
 836         for (; icit != iend; ++icit) {
 837                 if (icit.getInset()) {
 838                         icit.getInset()->validate(features);
 839                         if (layout.needprotect &&
 840                             icit.getInset()->lyxCode() == Inset::FOOT_CODE)
 841                                 features.require("NeedLyXFootnoteCode");
 842                 }
 843         }
 844
 845         // then the contents
 846         for (pos_type i = 0; i < size() ; ++i) {
 847                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 848                         if (!special_phrases[pnr].builtin
 849                             && isTextAt(special_phrases[pnr].phrase, i)) {
 850                                 features.require(special_phrases[pnr].phrase);
 851                                 break;
 852                         }
 853                 }
 854         }
 855 }