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