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