src/paragraph_pimpl.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2001 The LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12
  13 #include "paragraph_pimpl.h"
  14 #include "LaTeXFeatures.h"
  15 #include "texrow.h"
  16 #include "language.h"
  17 #include "bufferparams.h"
  18 #include "encoding.h"
  19 #include "lyxrc.h"
  20 #include "debug.h"
  21
  22 #include "support/LAssert.h"
  23
  24 using lyx::pos_type;
  25 using std::endl;
  26 using std::ostream;
  27 using std::upper_bound;
  28 using std::lower_bound;
  29
  30 // Initialize static member.
  31 ShareContainer<LyXFont> Paragraph::Pimpl::FontTable::container;
  32 // Initialization of the counter for the paragraph id's,
  33 unsigned int Paragraph::Pimpl::paragraph_id = 0;
  34
  35 namespace {
  36
  37 struct special_phrase {
  38         string phrase;
  39         string macro;
  40         bool builtin;
  41 };
  42
  43 special_phrase special_phrases[] = {
  44         { "LyX", "\\LyX{}", false },
  45         { "TeX", "\\TeX{}", true },
  46         { "LaTeX2e", "\\LaTeXe{}", true },
  47         { "LaTeX", "\\LaTeX{}", true },
  48 };
  49
  50 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
  51
  52 } // namespace anon
  53
  54
  55 Paragraph::Pimpl::Pimpl(Paragraph * owner)
  56         : owner_(owner)
  57 {
  58         inset_owner = 0;
  59         id_ = paragraph_id++;
  60 }
  61
  62
  63 Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner, bool same_ids)
  64         : params(p.params), owner_(owner)
  65 {
  66         inset_owner = p.inset_owner;
  67         text = p.text;
  68         fontlist = p.fontlist;
  69         if (same_ids)
  70                 id_ = p.id_;
  71         else
  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         lyx::Assert(par);
  89         text = par->pimpl_->text;
  90         if (par->pimpl_->tracking()) {
  91                 changes_.reset(new Changes(*(par->pimpl_->changes_.get())));
  92         }
  93 }
  94
  95
  96 void Paragraph::Pimpl::trackChanges(Change::Type type)
  97 {
  98         if (tracking()) {
  99                 lyxerr[Debug::CHANGES] << "already tracking for par " << id_ << endl;
 100                 return;
 101         }
 102
 103         lyxerr[Debug::CHANGES] << "track changes for par "
 104                 << id_ << " type " << type << endl;
 105         changes_.reset(new Changes(type));
 106         changes_->set(type, 0, size());
 107 }
 108
 109
 110 void Paragraph::Pimpl::untrackChanges()
 111 {
 112         changes_.reset(0);
 113 }
 114
 115
 116 void Paragraph::Pimpl::cleanChanges()
 117 {
 118         // if we're not tracking, we don't want to reset...
 119         if (!tracking())
 120                 return;
 121
 122         changes_.reset(new Changes(Change::INSERTED));
 123         changes_->set(Change::INSERTED, 0, size());
 124 }
 125
 126
 127 bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
 128 {
 129         if (!tracking())
 130                 return false;
 131
 132         return changes_->isChange(start, end);
 133 }
 134
 135
 136 bool Paragraph::Pimpl::isChangeEdited(pos_type start, pos_type end) const
 137 {
 138         if (!tracking())
 139                 return false;
 140
 141         return changes_->isChangeEdited(start, end);
 142 }
 143
 144
 145 void Paragraph::Pimpl::setChange(pos_type pos, Change::Type type)
 146 {
 147         if (!tracking())
 148                 return;
 149
 150         changes_->set(type, pos);
 151 }
 152
 153
 154 Change::Type Paragraph::Pimpl::lookupChange(pos_type pos) const
 155 {
 156         if (!tracking())
 157                 return Change::UNCHANGED;
 158
 159         return changes_->lookup(pos);
 160 }
 161
 162
 163 Change const Paragraph::Pimpl::lookupChangeFull(pos_type pos) const
 164 {
 165         if (!tracking())
 166                 return Change(Change::UNCHANGED);
 167
 168         return changes_->lookupFull(pos);
 169 }
 170
 171
 172 void Paragraph::Pimpl::markErased()
 173 {
 174         lyx::Assert(tracking());
 175
 176         // FIXME: we should actually remove INSERTED chars.
 177         // difficult because owning insettexts/tabulars need
 178         // to update themselves when rows etc. change
 179         changes_->set(Change::DELETED, 0, size());
 180         changes_->reset(Change::DELETED);
 181 }
 182
 183
 184 void Paragraph::Pimpl::acceptChange(pos_type start, pos_type end)
 185 {
 186         if (!tracking())
 187                 return;
 188
 189         if (!size()) {
 190                 changes_.reset(new Changes(Change::UNCHANGED));
 191                 return;
 192         }
 193
 194         lyxerr << "acceptchange" << endl;
 195         pos_type i = start;
 196
 197         for (; i < end; ++i) {
 198                 switch (lookupChange(i)) {
 199                         case Change::UNCHANGED:
 200                                 break;
 201
 202                         case Change::INSERTED:
 203                                 changes_->set(Change::UNCHANGED, i);
 204                                 break;
 205
 206                         case Change::DELETED:
 207                                 eraseIntern(i);
 208                                 changes_->erase(i);
 209                                 --end;
 210                                 --i;
 211                                 break;
 212                 }
 213         }
 214
 215         lyxerr << "endacceptchange" << endl;
 216         changes_->reset(Change::UNCHANGED);
 217 }
 218
 219
 220 void Paragraph::Pimpl::rejectChange(pos_type start, pos_type end)
 221 {
 222         if (!tracking())
 223                 return;
 224
 225         if (!size()) {
 226                 changes_.reset(new Changes(Change::UNCHANGED));
 227                 return;
 228         }
 229
 230         pos_type i = start;
 231
 232         for (; i < end; ++i) {
 233                 switch (lookupChange(i)) {
 234                         case Change::UNCHANGED:
 235                                 break;
 236
 237                         case Change::INSERTED:
 238                                 eraseIntern(i);
 239                                 changes_->erase(i);
 240                                 --end;
 241                                 --i;
 242                                 break;
 243
 244                         case Change::DELETED:
 245                                 changes_->set(Change::UNCHANGED, i);
 246                                 break;
 247                 }
 248         }
 249         changes_->reset(Change::UNCHANGED);
 250 }
 251
 252
 253 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 254 {
 255 #if 1
 256         // This is in the critical path for loading!
 257         pos_type const siz = size();
 258
 259         lyx::Assert(pos <= siz);
 260
 261         if (pos == siz) {
 262                 lyxerr << "getChar() on pos " << pos << " in par id "
 263                        << owner_->id() << " of size " << siz
 264                        << "  is a bit silly !" << endl;
 265                 return '\0';
 266         }
 267
 268         return text[pos];
 269 #else
 270         lyx::Assert(pos < size());
 271         return text[pos];
 272 #endif
 273 }
 274
 275
 276 void Paragraph::Pimpl::setChar(pos_type pos, value_type c)
 277 {
 278 #warning changes
 279         text[pos] = c;
 280 }
 281
 282
 283 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c,
 284                                   LyXFont const & font, Change change)
 285 {
 286         lyx::Assert(pos <= size());
 287
 288         if (tracking()) {
 289                 changes_->record(change, pos);
 290         }
 291
 292         // This is actually very common when parsing buffers (and
 293         // maybe inserting ascii text)
 294         if (pos == size()) {
 295                 // when appending characters, no need to update tables
 296                 text.push_back(c);
 297                 owner_->setFont(pos, font);
 298                 return;
 299         }
 300
 301         text.insert(text.begin() + pos, c);
 302
 303         // Update the font table.
 304         FontTable search_font(pos, LyXFont());
 305         for (FontList::iterator it = lower_bound(fontlist.begin(),
 306                                                       fontlist.end(),
 307                                                       search_font, matchFT());
 308              it != fontlist.end(); ++it)
 309         {
 310                 it->pos(it->pos() + 1);
 311         }
 312
 313         // Update the insets
 314         owner_->insetlist.increasePosAfterPos(pos);
 315
 316         owner_->setFont(pos, font);
 317 }
 318
 319
 320 void Paragraph::Pimpl::insertInset(pos_type pos,
 321                                    Inset * inset, LyXFont const & font, Change change)
 322 {
 323         lyx::Assert(inset);
 324         lyx::Assert(pos <= size());
 325
 326         insertChar(pos, META_INSET, font, change);
 327         lyx::Assert(text[pos] == META_INSET);
 328
 329         // Add a new entry in the insetlist.
 330         owner_->insetlist.insert(inset, pos);
 331         inset->parOwner(owner_);
 332
 333         if (inset_owner)
 334                 inset->setOwner(inset_owner);
 335 }
 336
 337
 338 bool Paragraph::Pimpl::erasePos(pos_type pos)
 339 {
 340         lyx::Assert(pos < size());
 341
 342         if (tracking()) {
 343                 Change::Type changetype(changes_->lookup(pos));
 344                 changes_->record(Change(Change::DELETED), pos);
 345
 346                 // only allow the actual removal if it was /new/ text
 347                 if (changetype != Change::INSERTED) {
 348                         if (text[pos] == Paragraph::META_INSET) {
 349                                 Inset * i(owner_->getInset(pos));
 350                                 i->markErased();
 351                         }
 352                         return false;
 353                 }
 354         }
 355
 356         eraseIntern(pos);
 357         return true;
 358 }
 359
 360
 361 void Paragraph::Pimpl::eraseIntern(pos_type pos)
 362 {
 363         // if it is an inset, delete the inset entry
 364         if (text[pos] == Paragraph::META_INSET) {
 365                 owner_->insetlist.erase(pos);
 366         }
 367
 368         text.erase(text.begin() + pos);
 369
 370         // Erase entries in the tables.
 371         FontTable search_font(pos, LyXFont());
 372
 373         FontList::iterator it =
 374                 lower_bound(fontlist.begin(),
 375                             fontlist.end(),
 376                             search_font, matchFT());
 377         if (it != fontlist.end() && it->pos() == pos &&
 378             (pos == 0 ||
 379              (it != fontlist.begin()
 380               && boost::prior(it)->pos() == pos - 1))) {
 381                 // If it is a multi-character font
 382                 // entry, we just make it smaller
 383                 // (see update below), otherwise we
 384                 // should delete it.
 385                 unsigned int const i = it - fontlist.begin();
 386                 fontlist.erase(fontlist.begin() + i);
 387                 it = fontlist.begin() + i;
 388                 if (i > 0 && i < fontlist.size() &&
 389                     fontlist[i - 1].font() == fontlist[i].font()) {
 390                         fontlist.erase(fontlist.begin() + i - 1);
 391                         it = fontlist.begin() + i - 1;
 392                 }
 393         }
 394
 395         // Update all other entries.
 396         FontList::iterator fend = fontlist.end();
 397         for (; it != fend; ++it)
 398                 it->pos(it->pos() - 1);
 399
 400         // Update the insetlist.
 401         owner_->insetlist.decreasePosAfterPos(pos);
 402 }
 403
 404
 405 void Paragraph::Pimpl::erase(pos_type pos)
 406 {
 407         erasePos(pos);
 408 }
 409
 410
 411 bool Paragraph::Pimpl::erase(pos_type start, pos_type end)
 412 {
 413         pos_type i = start;
 414         pos_type count = end - start;
 415         bool any_erased = false;
 416
 417         while (count) {
 418                 if (!erasePos(i)) {
 419                         ++i;
 420                 } else {
 421                         any_erased = true;
 422                 }
 423                 --count;
 424         }
 425         return any_erased;
 426 }
 427
 428
 429 void Paragraph::Pimpl::simpleTeXBlanks(ostream & os, TexRow & texrow,
 430                                        pos_type const i,
 431                                        unsigned int & column,
 432                                        LyXFont const & font,
 433                                        LyXLayout const & style)
 434 {
 435         if (style.pass_thru)
 436                 return;
 437
 438         if (column > lyxrc.ascii_linelen
 439             && i
 440             && getChar(i - 1) != ' '
 441             && (i < size() - 1)
 442             // same in FreeSpacing mode
 443             && !style.free_spacing
 444                 && !owner_->isFreeSpacing()
 445             // In typewriter mode, we want to avoid
 446             // ! . ? : at the end of a line
 447             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 448                  && (getChar(i - 1) == '.'
 449                      || getChar(i - 1) == '?'
 450                      || getChar(i - 1) == ':'
 451                      || getChar(i - 1) == '!'))) {
 452                 os << '\n';
 453                 texrow.newline();
 454                 texrow.start(owner_, i + 1);
 455                 column = 0;
 456         } else if (style.free_spacing) {
 457                 os << '~';
 458         } else {
 459                 os << ' ';
 460         }
 461 }
 462
 463
 464 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 465 {
 466         pos_type const len = str.length();
 467
 468         // is the paragraph large enough?
 469         if (pos + len > size())
 470                 return false;
 471
 472         // does the wanted text start at point?
 473         for (string::size_type i = 0; i < str.length(); ++i) {
 474                 if (str[i] != text[pos + i])
 475                         return false;
 476         }
 477
 478         // is there a font change in middle of the word?
 479         FontList::const_iterator cit = fontlist.begin();
 480         FontList::const_iterator end = fontlist.end();
 481         for (; cit != end; ++cit) {
 482                 if (cit->pos() >= pos)
 483                         break;
 484         }
 485         if (cit != end && pos + len - 1 > cit->pos())
 486                 return false;
 487
 488         return true;
 489 }
 490
 491
 492 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const * buf,
 493                                              BufferParams const & bparams,
 494                                              ostream & os,
 495                                              TexRow & texrow,
 496                                              bool moving_arg,
 497                                              LyXFont & font,
 498                                              LyXFont & running_font,
 499                                              LyXFont & basefont,
 500                                              bool & open_font,
 501                                              Change::Type & running_change,
 502                                              LyXLayout const & style,
 503                                              pos_type & i,
 504                                              unsigned int & column,
 505                                              value_type const c)
 506 {
 507         if (style.pass_thru) {
 508                 if (c != Paragraph::META_INSET) {
 509                         if (c != '\0')
 510                                 os << c;
 511                 } else {
 512                         Inset const * inset = owner_->getInset(i);
 513                         inset->ascii(buf, os, 0);
 514                 }
 515                 return;
 516         }
 517
 518         // Two major modes:  LaTeX or plain
 519         // Handle here those cases common to both modes
 520         // and then split to handle the two modes separately.
 521         switch (c) {
 522         case Paragraph::META_INSET: {
 523                 Inset * inset = owner_->getInset(i);
 524
 525                 // FIXME: remove this check
 526                 if (!inset)
 527                         break;
 528
 529                 // FIXME: move this to InsetNewline::latex
 530                 if (inset->lyxCode() == Inset::NEWLINE_CODE) {
 531                         // newlines are handled differently here than
 532                         // the default in simpleTeXSpecialChars().
 533                         if (!style.newline_allowed) {
 534                                 os << '\n';
 535                         } else {
 536                                 if (open_font) {
 537                                         column += running_font.latexWriteEndChanges(os, basefont, basefont);
 538                                         open_font = false;
 539                                 }
 540                                 basefont = owner_->getLayoutFont(bparams);
 541                                 running_font = basefont;
 542
 543                                 if (font.family() == LyXFont::TYPEWRITER_FAMILY)
 544                                         os << '~';
 545
 546                                 if (moving_arg)
 547                                         os << "\\protect ";
 548
 549                                 os << "\\\\\n";
 550                         }
 551                         texrow.newline();
 552                         texrow.start(owner_, i + 1);
 553                         column = 0;
 554                         break;
 555                 }
 556
 557                 if (inset->isTextInset()) {
 558                         column += Changes::latexMarkChange(os, running_change,
 559                                 Change::UNCHANGED);
 560                         running_change = Change::UNCHANGED;
 561                 }
 562
 563                 bool close = false;
 564                 int const len = os.tellp();
 565                 //ostream::pos_type const len = os.tellp();
 566                 if ((inset->lyxCode() == Inset::GRAPHICS_CODE
 567                      || inset->lyxCode() == Inset::MATH_CODE
 568                      || inset->lyxCode() == Inset::URL_CODE)
 569                     && running_font.isRightToLeft()) {
 570                         os << "\\L{";
 571                         close = true;
 572                 }
 573
 574 #ifdef WITH_WARNINGS
 575 #warning Bug: we can have an empty font change here!
 576 // if there has just been a font change, we are going to close it
 577 // right now, which means stupid latex code like \textsf{}. AFAIK,
 578 // this does not harm dvi output. A minor bug, thus (JMarc)
 579 #endif
 580                 // some insets cannot be inside a font change command
 581                 if (open_font && inset->noFontChange()) {
 582                         column +=running_font.
 583                                 latexWriteEndChanges(os,
 584                                                      basefont,
 585                                                      basefont);
 586                         open_font = false;
 587                         basefont = owner_->getLayoutFont(bparams);
 588                         running_font = basefont;
 589                 }
 590
 591                 int tmp = inset->latex(buf, os, moving_arg,
 592                                        style.free_spacing);
 593
 594                 if (close)
 595                         os << '}';
 596
 597                 if (tmp) {
 598                         for (int j = 0; j < tmp; ++j) {
 599                                 texrow.newline();
 600                         }
 601                         texrow.start(owner_, i + 1);
 602                         column = 0;
 603                 } else {
 604                         column += int(os.tellp()) - len;
 605                 }
 606         }
 607         break;
 608
 609         default:
 610                 // And now for the special cases within each mode
 611
 612                 switch (c) {
 613                 case '\\':
 614                         os << "\\textbackslash{}";
 615                         column += 15;
 616                         break;
 617
 618                 case '±': case '²': case '³':
 619                 case '×': case '÷': case '¹':
 620                 case '¬': case 'µ':
 621                         if ((bparams.inputenc == "latin1" ||
 622                              bparams.inputenc == "latin9") ||
 623                             (bparams.inputenc == "auto" &&
 624                              (font.language()->encoding()->LatexName()
 625                               == "latin1" ||
 626                               font.language()->encoding()->LatexName()
 627                               == "latin9"))) {
 628                                 os << "\\ensuremath{"
 629                                    << c
 630                                    << '}';
 631                                 column += 13;
 632                         } else {
 633                                 os << c;
 634                         }
 635                         break;
 636
 637                 case '|': case '<': case '>':
 638                         // In T1 encoding, these characters exist
 639                         if (lyxrc.fontenc == "T1") {
 640                                 os << c;
 641                                 //... but we should avoid ligatures
 642                                 if ((c == '>' || c == '<')
 643                                     && i <= size() - 2
 644                                     && getChar(i + 1) == c) {
 645                                         //os << "\\textcompwordmark{}";
 646                                         // Jean-Marc, have a look at
 647                                         // this. I think this works
 648                                         // equally well:
 649                                         os << "\\,{}";
 650                                         // Lgb
 651                                         column += 19;
 652                                 }
 653                                 break;
 654                         }
 655                         // Typewriter font also has them
 656                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 657                                 os << c;
 658                                 break;
 659                         }
 660                         // Otherwise, we use what LaTeX
 661                         // provides us.
 662                         switch (c) {
 663                         case '<':
 664                                 os << "\\textless{}";
 665                                 column += 10;
 666                                 break;
 667                         case '>':
 668                                 os << "\\textgreater{}";
 669                                 column += 13;
 670                                 break;
 671                         case '|':
 672                                 os << "\\textbar{}";
 673                                 column += 9;
 674                                 break;
 675                         }
 676                         break;
 677
 678                 case '-': // "--" in Typewriter mode -> "-{}-"
 679                         if (i <= size() - 2
 680                             && getChar(i + 1) == '-'
 681                             && font.family() == LyXFont::TYPEWRITER_FAMILY) {
 682                                 os << "-{}";
 683                                 column += 2;
 684                         } else {
 685                                 os << '-';
 686                         }
 687                         break;
 688
 689                 case '\"':
 690                         os << "\\char`\\\"{}";
 691                         column += 9;
 692                         break;
 693
 694                 case '£':
 695                         if (bparams.inputenc == "default") {
 696                                 os << "\\pounds{}";
 697                                 column += 8;
 698                         } else {
 699                                 os << c;
 700                         }
 701                         break;
 702
 703                 case '$': case '&':
 704                 case '%': case '#': case '{':
 705                 case '}': case '_':
 706                         os << '\\' << c;
 707                         column += 1;
 708                         break;
 709
 710                 case '~':
 711                         os << "\\textasciitilde{}";
 712                         column += 16;
 713                         break;
 714
 715                 case '^':
 716                         os << "\\textasciicircum{}";
 717                         column += 17;
 718                         break;
 719
 720                 case '*': case '[': case ']':
 721                         // avoid being mistaken for optional arguments
 722                         os << '{' << c << '}';
 723                         column += 2;
 724                         break;
 725
 726                 case ' ':
 727                         // Blanks are printed before font switching.
 728                         // Sure? I am not! (try nice-latex)
 729                         // I am sure it's correct. LyX might be smarter
 730                         // in the future, but for now, nothing wrong is
 731                         // written. (Asger)
 732                         break;
 733
 734                 default:
 735
 736                         // I assume this is hack treating typewriter as verbatim
 737                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 738                                 if (c != '\0') {
 739                                         os << c;
 740                                 }
 741                                 break;
 742                         }
 743
 744                         // LyX, LaTeX etc.
 745
 746                         // FIXME: if we have "LaTeX" with a font
 747                         // change in the middle (before the 'T', then
 748                         // the "TeX" part is still special cased.
 749                         // Really we should only operate this on
 750                         // "words" for some definition of word
 751
 752                         size_t pnr = 0;
 753
 754                         for (; pnr < phrases_nr; ++pnr) {
 755                                 if (isTextAt(special_phrases[pnr].phrase, i)) {
 756                                         os << special_phrases[pnr].macro;
 757                                         i += special_phrases[pnr].phrase.length() - 1;
 758                                         column += special_phrases[pnr].macro.length() - 1;
 759                                         break;
 760                                 }
 761                         }
 762
 763                         if (pnr == phrases_nr && c != '\0') {
 764                                 os << c;
 765                         }
 766                         break;
 767                 }
 768         }
 769 }
 770
 771
 772 void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 773                                 LyXLayout const & layout) const
 774 {
 775         BufferParams const & bparams = features.bufferParams();
 776
 777         // check the params.
 778         if (params.lineTop() || params.lineBottom())
 779                 features.require("lyxline");
 780         if (!params.spacing().isDefault())
 781                 features.require("setspace");
 782
 783         // then the layouts
 784         features.useLayout(layout.name());
 785
 786         // then the fonts
 787         Language const * doc_language = bparams.language;
 788
 789         FontList::const_iterator fcit = fontlist.begin();
 790         FontList::const_iterator fend = fontlist.end();
 791         for (; fcit != fend; ++fcit) {
 792                 if (fcit->font().noun() == LyXFont::ON) {
 793                         lyxerr[Debug::LATEX] << "font.noun: "
 794                                              << fcit->font().noun()
 795                                              << endl;
 796                         features.require("noun");
 797                         lyxerr[Debug::LATEX] << "Noun enabled. Font: "
 798                                              << fcit->font().stateText(0)
 799                                              << endl;
 800                 }
 801                 switch (fcit->font().color()) {
 802                 case LColor::none:
 803                 case LColor::inherit:
 804                 case LColor::ignore:
 805                         // probably we should put here all interface colors used for
 806                         // font displaying! For now I just add this ones I know of (Jug)
 807                 case LColor::latex:
 808                 case LColor::note:
 809                         break;
 810                 default:
 811                         features.require("color");
 812                         lyxerr[Debug::LATEX] << "Color enabled. Font: "
 813                                              << fcit->font().stateText(0)
 814                                              << endl;
 815                 }
 816
 817                 Language const * language = fcit->font().language();
 818                 if (language->babel() != doc_language->babel() &&
 819                     language != ignore_language &&
 820                     language != latex_language)
 821                 {
 822                         features.useLanguage(language);
 823                         lyxerr[Debug::LATEX] << "Found language "
 824                                              << language->babel() << endl;
 825                 }
 826         }
 827
 828         if (!params.leftIndent().zero())
 829                 features.require("ParagraphLeftIndent");
 830
 831         // then the insets
 832         InsetList::iterator icit = owner_->insetlist.begin();
 833         InsetList::iterator iend = owner_->insetlist.end();
 834         for (; icit != iend; ++icit) {
 835                 if (icit.getInset()) {
 836                         icit.getInset()->validate(features);
 837                         if (layout.needprotect &&
 838                             icit.getInset()->lyxCode() == Inset::FOOT_CODE)
 839                                 features.require("NeedLyXFootnoteCode");
 840                 }
 841         }
 842
 843         // then the contents
 844         for (pos_type i = 0; i < size() ; ++i) {
 845                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 846                         if (!special_phrases[pnr].builtin
 847                             && isTextAt(special_phrases[pnr].phrase, i)) {
 848                                 features.require(special_phrases[pnr].phrase);
 849                                 break;
 850                         }
 851                 }
 852         }
 853 }
 854
 855
 856 LyXFont const Paragraph::Pimpl::realizeFont(LyXFont const & font,
 857                                             BufferParams const & bparams) const
 858 {
 859         LyXFont tmpfont(font);
 860
 861         // check for environment font information
 862         char par_depth = owner_->getDepth();
 863         Paragraph const * par = owner_;
 864         LyXTextClass const & tclass = bparams.getLyXTextClass();
 865
 866         while (par && par->getDepth() && !tmpfont.resolved()) {
 867                 par = par->outerHook();
 868                 if (par) {
 869                         tmpfont.realize(par->layout()->font);
 870                         par_depth = par->getDepth();
 871                 }
 872         }
 873
 874         tmpfont.realize(tclass.defaultfont());
 875         return tmpfont;
 876 }