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