src/paragraph_pimpl.C

   1 /**
   2  * \file paragraph_pimpl.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Jean-Marc Lasgouttes
   8  * \author John Levon
   9  * \author André Pönitz
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "paragraph_pimpl.h"
  17 #include "paragraph.h"
  18
  19 #include "bufferparams.h"
  20 #include "debug.h"
  21 #include "encoding.h"
  22 #include "language.h"
  23 #include "LaTeXFeatures.h"
  24 #include "LColor.h"
  25 #include "lyxlength.h"
  26 #include "lyxrc.h"
  27 #include "outputparams.h"
  28 #include "texrow.h"
  29
  30 #include <boost/next_prior.hpp>
  31
  32
  33 namespace lyx {
  34
  35 using std::endl;
  36 using std::upper_bound;
  37 using std::lower_bound;
  38 using std::string;
  39
  40
  41 // Initialization of the counter for the paragraph id's,
  42 unsigned int Paragraph::Pimpl::paragraph_id = 0;
  43
  44 namespace {
  45
  46 struct special_phrase {
  47         string phrase;
  48         docstring macro;
  49         bool builtin;
  50 };
  51
  52 special_phrase const special_phrases[] = {
  53         { "LyX", from_ascii("\\LyX{}"), false },
  54         { "TeX", from_ascii("\\TeX{}"), true },
  55         { "LaTeX2e", from_ascii("\\LaTeXe{}"), true },
  56         { "LaTeX", from_ascii("\\LaTeX{}"), true },
  57 };
  58
  59 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
  60
  61 } // namespace anon
  62
  63
  64 Paragraph::Pimpl::Pimpl(Paragraph * owner)
  65         : owner_(owner)
  66 {
  67         inset_owner = 0;
  68         id_ = paragraph_id++;
  69 }
  70
  71
  72 Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner)
  73         : params(p.params), changes_(p.changes_), owner_(owner)
  74 {
  75         inset_owner = p.inset_owner;
  76         fontlist = p.fontlist;
  77         id_ = paragraph_id++;
  78 }
  79
  80
  81 void Paragraph::Pimpl::setContentsFromPar(Paragraph const & par)
  82 {
  83         owner_->text_ = par.text_;
  84         // FIXME: change tracking (MG)
  85         // check whether this method is really needed
  86         changes_ = par.pimpl_->changes_;
  87 }
  88
  89
  90 bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
  91 {
  92         BOOST_ASSERT(start >= 0 && start <= size());
  93         BOOST_ASSERT(end > start && end <= size() + 1);
  94
  95         return changes_.isChanged(start, end);
  96 }
  97
  98
  99 void Paragraph::Pimpl::setChange(Change const & change)
 100 {
 101         // beware of the imaginary end-of-par character!
 102         changes_.set(change, 0, size() + 1);
 103
 104         /*
 105          * Propagate the change recursively - but not in case of DELETED!
 106          *
 107          * Imagine that your co-author makes changes in an existing inset. He
 108          * sends your document to you and you come to the conclusion that the
 109          * inset should go completely. If you erase it, LyX must not delete all
 110          * text within the inset. Otherwise, the change tracked insertions of
 111          * your co-author get lost and there is no way to restore them later.
 112          *
 113          * Conclusion: An inset's content should remain untouched if you delete it
 114          */
 115
 116         if (change.type != Change::DELETED) {
 117                 for (pos_type pos = 0; pos < size(); ++pos) {
 118                         if (owner_->isInset(pos)) {
 119                                 owner_->getInset(pos)->setChange(change);
 120                         }
 121                 }
 122         }
 123 }
 124
 125
 126 void Paragraph::Pimpl::setChange(pos_type pos, Change const & change)
 127 {
 128         BOOST_ASSERT(pos >= 0 && pos <= size());
 129
 130         changes_.set(change, pos);
 131
 132         // see comment in setChange(Change const &) above
 133
 134         if (change.type != Change::DELETED &&
 135             pos < size() && owner_->isInset(pos)) {
 136                 owner_->getInset(pos)->setChange(change);
 137         }
 138 }
 139
 140
 141 Change const Paragraph::Pimpl::lookupChange(pos_type pos) const
 142 {
 143         BOOST_ASSERT(pos >= 0 && pos <= size());
 144
 145         return changes_.lookup(pos);
 146 }
 147
 148
 149 void Paragraph::Pimpl::acceptChanges(pos_type start, pos_type end)
 150 {
 151         BOOST_ASSERT(start >= 0 && start <= size());
 152         BOOST_ASSERT(end > start && end <= size() + 1);
 153
 154         for (pos_type pos = start; pos < end; ++pos) {
 155                 switch (lookupChange(pos).type) {
 156                         case Change::UNCHANGED:
 157                                 break;
 158
 159                         case Change::INSERTED:
 160                                 changes_.set(Change(Change::UNCHANGED), pos);
 161                                 break;
 162
 163                         case Change::DELETED:
 164                                 // Suppress access to non-existent
 165                                 // "end-of-paragraph char"
 166                                 if (pos < size()) {
 167                                         eraseChar(pos, false);
 168                                         --end;
 169                                         --pos;
 170                                 }
 171                                 break;
 172                 }
 173
 174                 // also accept changes in nested insets
 175                 if (pos < size() && owner_->isInset(pos)) {
 176                         owner_->getInset(pos)->acceptChanges();
 177                 }
 178         }
 179 }
 180
 181
 182 void Paragraph::Pimpl::rejectChanges(pos_type start, pos_type end)
 183 {
 184         BOOST_ASSERT(start >= 0 && start <= size());
 185         BOOST_ASSERT(end > start && end <= size() + 1);
 186
 187         for (pos_type pos = start; pos < end; ++pos) {
 188                 switch (lookupChange(pos).type) {
 189                         case Change::UNCHANGED:
 190                                 // also reject changes inside of insets
 191                                 if (pos < size() && owner_->isInset(pos)) {
 192                                         owner_->getInset(pos)->rejectChanges();
 193                                 }
 194                                 break;
 195
 196                         case Change::INSERTED:
 197                                 // Suppress access to non-existent
 198                                 // "end-of-paragraph char"
 199                                 if (pos < size()) {
 200                                         eraseChar(pos, false);
 201                                         --end;
 202                                         --pos;
 203                                 }
 204                                 break;
 205
 206                         case Change::DELETED:
 207                                 changes_.set(Change(Change::UNCHANGED), pos);
 208
 209                                 // Do NOT reject changes within a deleted inset!
 210                                 // There may be insertions of a co-author inside of it!
 211
 212                                 break;
 213                 }
 214         }
 215 }
 216
 217
 218 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 219 {
 220         BOOST_ASSERT(pos >= 0 && pos <= size());
 221
 222         return owner_->getChar(pos);
 223 }
 224
 225
 226 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c, Change const & change)
 227 {
 228         BOOST_ASSERT(pos >= 0 && pos <= size());
 229
 230         // track change
 231         changes_.insert(change, pos);
 232
 233         // This is actually very common when parsing buffers (and
 234         // maybe inserting ascii text)
 235         if (pos == size()) {
 236                 // when appending characters, no need to update tables
 237                 owner_->text_.push_back(c);
 238                 return;
 239         }
 240
 241         owner_->text_.insert(owner_->text_.begin() + pos, c);
 242
 243         // Update the font table.
 244         FontTable search_font(pos, LyXFont());
 245         for (FontList::iterator it
 246               = lower_bound(fontlist.begin(), fontlist.end(), search_font, matchFT());
 247              it != fontlist.end(); ++it)
 248         {
 249                 it->pos(it->pos() + 1);
 250         }
 251
 252         // Update the insets
 253         owner_->insetlist.increasePosAfterPos(pos);
 254 }
 255
 256
 257 void Paragraph::Pimpl::insertInset(pos_type pos, InsetBase * inset,
 258                                    Change const & change)
 259 {
 260         BOOST_ASSERT(inset);
 261         BOOST_ASSERT(pos >= 0 && pos <= size());
 262
 263         insertChar(pos, META_INSET, change);
 264         BOOST_ASSERT(owner_->text_[pos] == META_INSET);
 265
 266         // Add a new entry in the insetlist.
 267         owner_->insetlist.insert(inset, pos);
 268 }
 269
 270
 271 bool Paragraph::Pimpl::eraseChar(pos_type pos, bool trackChanges)
 272 {
 273         BOOST_ASSERT(pos >= 0 && pos <= size());
 274
 275         if (trackChanges) {
 276                 Change::Type changetype(changes_.lookup(pos).type);
 277
 278                 if (changetype == Change::UNCHANGED) {
 279                         setChange(pos, Change(Change::DELETED));
 280                         return false;
 281                 }
 282
 283                 if (changetype == Change::DELETED)
 284                         return false;
 285         }
 286
 287         // Don't physically access nonexistent end-of-paragraph char
 288         if (pos == size()) {
 289                 // FIXME: change tracking (MG)
 290                 // how do we handle end-of-pars previously marked inserted?
 291                 return false;
 292         }
 293
 294         // track change
 295         changes_.erase(pos);
 296
 297         // if it is an inset, delete the inset entry
 298         if (owner_->text_[pos] == Paragraph::META_INSET) {
 299                 owner_->insetlist.erase(pos);
 300         }
 301
 302         owner_->text_.erase(owner_->text_.begin() + pos);
 303
 304         // Erase entries in the tables.
 305         FontTable search_font(pos, LyXFont());
 306
 307         FontList::iterator it =
 308                 lower_bound(fontlist.begin(),
 309                             fontlist.end(),
 310                             search_font, matchFT());
 311         if (it != fontlist.end() && it->pos() == pos &&
 312             (pos == 0 ||
 313              (it != fontlist.begin()
 314               && boost::prior(it)->pos() == pos - 1))) {
 315                 // If it is a multi-character font
 316                 // entry, we just make it smaller
 317                 // (see update below), otherwise we
 318                 // should delete it.
 319                 unsigned int const i = it - fontlist.begin();
 320                 fontlist.erase(fontlist.begin() + i);
 321                 it = fontlist.begin() + i;
 322                 if (i > 0 && i < fontlist.size() &&
 323                     fontlist[i - 1].font() == fontlist[i].font()) {
 324                         fontlist.erase(fontlist.begin() + i - 1);
 325                         it = fontlist.begin() + i - 1;
 326                 }
 327         }
 328
 329         // Update all other entries
 330         FontList::iterator fend = fontlist.end();
 331         for (; it != fend; ++it)
 332                 it->pos(it->pos() - 1);
 333
 334         // Update the insetlist
 335         owner_->insetlist.decreasePosAfterPos(pos);
 336
 337         return true;
 338 }
 339
 340
 341 int Paragraph::Pimpl::eraseChars(pos_type start, pos_type end, bool trackChanges)
 342 {
 343         BOOST_ASSERT(start >= 0 && start <= size());
 344         BOOST_ASSERT(end > start && end <= size() + 1);
 345
 346         pos_type i = start;
 347         for (pos_type count = end - start; count; --count) {
 348                 if (!eraseChar(i, trackChanges))
 349                         ++i;
 350         }
 351         return end - i;
 352 }
 353
 354
 355 void Paragraph::Pimpl::simpleTeXBlanks(odocstream & os, TexRow & texrow,
 356                                        pos_type const i,
 357                                        unsigned int & column,
 358                                        LyXFont const & font,
 359                                        LyXLayout const & style)
 360 {
 361         if (style.pass_thru)
 362                 return;
 363
 364         if (column > lyxrc.ascii_linelen
 365             && i
 366             && getChar(i - 1) != ' '
 367             && (i < size() - 1)
 368             // same in FreeSpacing mode
 369             && !owner_->isFreeSpacing()
 370             // In typewriter mode, we want to avoid
 371             // ! . ? : at the end of a line
 372             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 373                  && (getChar(i - 1) == '.'
 374                      || getChar(i - 1) == '?'
 375                      || getChar(i - 1) == ':'
 376                      || getChar(i - 1) == '!'))) {
 377                 os << '\n';
 378                 texrow.newline();
 379                 texrow.start(owner_->id(), i + 1);
 380                 column = 0;
 381         } else if (style.free_spacing) {
 382                 os << '~';
 383         } else {
 384                 os << ' ';
 385         }
 386 }
 387
 388
 389 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 390 {
 391         pos_type const len = str.length();
 392
 393         // is the paragraph large enough?
 394         if (pos + len > size())
 395                 return false;
 396
 397         // does the wanted text start at point?
 398         for (string::size_type i = 0; i < str.length(); ++i) {
 399                 if (str[i] != owner_->text_[pos + i])
 400                         return false;
 401         }
 402
 403         // is there a font change in middle of the word?
 404         FontList::const_iterator cit = fontlist.begin();
 405         FontList::const_iterator end = fontlist.end();
 406         for (; cit != end; ++cit) {
 407                 if (cit->pos() >= pos)
 408                         break;
 409         }
 410         if (cit != end && pos + len - 1 > cit->pos())
 411                 return false;
 412
 413         return true;
 414 }
 415
 416
 417 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 418                                              BufferParams const & bparams,
 419                                              odocstream & os,
 420                                              TexRow & texrow,
 421                                              OutputParams const & runparams,
 422                                              LyXFont & font,
 423                                              LyXFont & running_font,
 424                                              LyXFont & basefont,
 425                                              LyXFont const & outerfont,
 426                                              bool & open_font,
 427                                              Change::Type & running_change,
 428                                              LyXLayout const & style,
 429                                              pos_type & i,
 430                                              unsigned int & column,
 431                                              value_type const c)
 432 {
 433         if (style.pass_thru) {
 434                 if (c != Paragraph::META_INSET) {
 435                         if (c != '\0')
 436                                 os.put(c);
 437                 } else
 438                         owner_->getInset(i)->plaintext(buf, os, runparams);
 439                 return;
 440         }
 441
 442         // Two major modes:  LaTeX or plain
 443         // Handle here those cases common to both modes
 444         // and then split to handle the two modes separately.
 445         switch (c) {
 446         case Paragraph::META_INSET: {
 447                 InsetBase * inset = owner_->getInset(i);
 448
 449                 // FIXME: remove this check
 450                 if (!inset)
 451                         break;
 452
 453                 // FIXME: move this to InsetNewline::latex
 454                 if (inset->lyxCode() == InsetBase::NEWLINE_CODE) {
 455                         // newlines are handled differently here than
 456                         // the default in simpleTeXSpecialChars().
 457                         if (!style.newline_allowed) {
 458                                 os << '\n';
 459                         } else {
 460                                 if (open_font) {
 461                                         column += running_font.latexWriteEndChanges(os, basefont, basefont);
 462                                         open_font = false;
 463                                 }
 464                                 basefont = owner_->getLayoutFont(bparams, outerfont);
 465                                 running_font = basefont;
 466
 467                                 if (font.family() == LyXFont::TYPEWRITER_FAMILY)
 468                                         os << '~';
 469
 470                                 if (runparams.moving_arg)
 471                                         os << "\\protect ";
 472
 473                                 os << "\\\\\n";
 474                         }
 475                         texrow.newline();
 476                         texrow.start(owner_->id(), i + 1);
 477                         column = 0;
 478                         break;
 479                 }
 480
 481                 // output change tracking marks only if desired,
 482                 // if dvipost is installed,
 483                 // and with dvi/ps (other formats don't work)
 484                 LaTeXFeatures features(buf, bparams, runparams);
 485                 bool const output = bparams.outputChanges
 486                         && runparams.flavor == OutputParams::LATEX
 487                         && features.isAvailable("dvipost");
 488
 489                 if (inset->canTrackChanges()) {
 490                         column += Changes::latexMarkChange(os, running_change,
 491                                 Change::UNCHANGED, output);
 492                         running_change = Change::UNCHANGED;
 493                 }
 494
 495                 bool close = false;
 496                 odocstream::pos_type const len = os.tellp();
 497
 498                 if ((inset->lyxCode() == InsetBase::GRAPHICS_CODE
 499                      || inset->lyxCode() == InsetBase::MATH_CODE
 500                      || inset->lyxCode() == InsetBase::URL_CODE)
 501                     && running_font.isRightToLeft()) {
 502                         os << "\\L{";
 503                         close = true;
 504                 }
 505
 506 #ifdef WITH_WARNINGS
 507 #warning Bug: we can have an empty font change here!
 508 // if there has just been a font change, we are going to close it
 509 // right now, which means stupid latex code like \textsf{}. AFAIK,
 510 // this does not harm dvi output. A minor bug, thus (JMarc)
 511 #endif
 512                 // some insets cannot be inside a font change command
 513                 if (open_font && inset->noFontChange()) {
 514                         column +=running_font.
 515                                 latexWriteEndChanges(os,
 516                                                      basefont,
 517                                                      basefont);
 518                         open_font = false;
 519                         basefont = owner_->getLayoutFont(bparams, outerfont);
 520                         running_font = basefont;
 521                 }
 522
 523                 int tmp = inset->latex(buf, os, runparams);
 524
 525                 if (close)
 526                         os << '}';
 527
 528                 if (tmp) {
 529                         for (int j = 0; j < tmp; ++j) {
 530                                 texrow.newline();
 531                         }
 532                         texrow.start(owner_->id(), i + 1);
 533                         column = 0;
 534                 } else {
 535                         column += os.tellp() - len;
 536                 }
 537         }
 538         break;
 539
 540         default:
 541                 // And now for the special cases within each mode
 542
 543                 switch (c) {
 544                 case '\\':
 545                         os << "\\textbackslash{}";
 546                         column += 15;
 547                         break;
 548
 549                 // The following characters could be written literally in latin1, but they
 550                 // would be wrongly converted on systems where char is signed, so we give
 551                 // the code points.
 552                 // This also makes us independant from the encoding of this source file.
 553                 case 0xb1:    // ± PLUS-MINUS SIGN
 554                 case 0xb2:    // ² SUPERSCRIPT TWO
 555                 case 0xb3:    // ³ SUPERSCRIPT THREE
 556                 case 0xd7:    // × MULTIPLICATION SIGN
 557                 case 0xf7:    // ÷ DIVISION SIGN
 558                 case 0xb9:    // ¹ SUPERSCRIPT ONE
 559                 case 0xac:    // ¬ NOT SIGN
 560                 case 0xb5:    // µ MICRO SIGN
 561                         if ((bparams.inputenc == "latin1" ||
 562                              bparams.inputenc == "latin9") ||
 563                             (bparams.inputenc == "auto" &&
 564                              (font.language()->encoding()->latexName()
 565                               == "latin1" ||
 566                               font.language()->encoding()->latexName()
 567                               == "latin9"))) {
 568                                 os << "\\ensuremath{";
 569                                 os.put(c);
 570                                 os << '}';
 571                                 column += 13;
 572                         } else {
 573                                 os.put(c);
 574                         }
 575                         break;
 576
 577                 case '|': case '<': case '>':
 578                         // In T1 encoding, these characters exist
 579                         if (lyxrc.fontenc == "T1") {
 580                                 os.put(c);
 581                                 //... but we should avoid ligatures
 582                                 if ((c == '>' || c == '<')
 583                                     && i <= size() - 2
 584                                     && getChar(i + 1) == c) {
 585                                         //os << "\\textcompwordmark{}";
 586                                         // Jean-Marc, have a look at
 587                                         // this. I think this works
 588                                         // equally well:
 589                                         os << "\\,{}";
 590                                         // Lgb
 591                                         column += 19;
 592                                 }
 593                                 break;
 594                         }
 595                         // Typewriter font also has them
 596                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 597                                 os.put(c);
 598                                 break;
 599                         }
 600                         // Otherwise, we use what LaTeX
 601                         // provides us.
 602                         switch (c) {
 603                         case '<':
 604                                 os << "\\textless{}";
 605                                 column += 10;
 606                                 break;
 607                         case '>':
 608                                 os << "\\textgreater{}";
 609                                 column += 13;
 610                                 break;
 611                         case '|':
 612                                 os << "\\textbar{}";
 613                                 column += 9;
 614                                 break;
 615                         }
 616                         break;
 617
 618                 case '-': // "--" in Typewriter mode -> "-{}-"
 619                         if (i <= size() - 2
 620                             && getChar(i + 1) == '-'
 621                             && font.family() == LyXFont::TYPEWRITER_FAMILY) {
 622                                 os << "-{}";
 623                                 column += 2;
 624                         } else {
 625                                 os << '-';
 626                         }
 627                         break;
 628
 629                 case '\"':
 630                         os << "\\char`\\\"{}";
 631                         column += 9;
 632                         break;
 633
 634                 case 0xa3:    // £ POUND SIGN
 635                         if (bparams.inputenc == "default") {
 636                                 os << "\\pounds{}";
 637                                 column += 8;
 638                         } else {
 639                                 os.put(c);
 640                         }
 641                         break;
 642
 643                 case '$': case '&':
 644                 case '%': case '#': case '{':
 645                 case '}': case '_':
 646                         os << '\\';
 647                         os.put(c);
 648                         column += 1;
 649                         break;
 650
 651                 case '~':
 652                         os << "\\textasciitilde{}";
 653                         column += 16;
 654                         break;
 655
 656                 case '^':
 657                         os << "\\textasciicircum{}";
 658                         column += 17;
 659                         break;
 660
 661                 case '*': case '[':
 662                         // avoid being mistaken for optional arguments
 663                         os << '{';
 664                         os.put(c);
 665                         os << '}';
 666                         column += 2;
 667                         break;
 668
 669                 case ' ':
 670                         // Blanks are printed before font switching.
 671                         // Sure? I am not! (try nice-latex)
 672                         // I am sure it's correct. LyX might be smarter
 673                         // in the future, but for now, nothing wrong is
 674                         // written. (Asger)
 675                         break;
 676
 677                 default:
 678
 679                         // I assume this is hack treating typewriter as verbatim
 680                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 681                                 if (c != '\0') {
 682                                         os.put(c);
 683                                 }
 684                                 break;
 685                         }
 686
 687                         // LyX, LaTeX etc.
 688
 689                         // FIXME: if we have "LaTeX" with a font
 690                         // change in the middle (before the 'T', then
 691                         // the "TeX" part is still special cased.
 692                         // Really we should only operate this on
 693                         // "words" for some definition of word
 694
 695                         size_t pnr = 0;
 696
 697                         for (; pnr < phrases_nr; ++pnr) {
 698                                 if (isTextAt(special_phrases[pnr].phrase, i)) {
 699                                         os << special_phrases[pnr].macro;
 700                                         i += special_phrases[pnr].phrase.length() - 1;
 701                                         column += special_phrases[pnr].macro.length() - 1;
 702                                         break;
 703                                 }
 704                         }
 705
 706                         if (pnr == phrases_nr && c != '\0') {
 707                                 os.put(c);
 708                         }
 709                         break;
 710                 }
 711         }
 712 }
 713
 714
 715 void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 716                                 LyXLayout const & layout) const
 717 {
 718         BufferParams const & bparams = features.bufferParams();
 719
 720         // check the params.
 721         if (!params.spacing().isDefault())
 722                 features.require("setspace");
 723
 724         // then the layouts
 725         features.useLayout(layout.name());
 726
 727         // then the fonts
 728         Language const * doc_language = bparams.language;
 729
 730         FontList::const_iterator fcit = fontlist.begin();
 731         FontList::const_iterator fend = fontlist.end();
 732         for (; fcit != fend; ++fcit) {
 733                 if (fcit->font().noun() == LyXFont::ON) {
 734                         lyxerr[Debug::LATEX] << "font.noun: "
 735                                              << fcit->font().noun()
 736                                              << endl;
 737                         features.require("noun");
 738                         lyxerr[Debug::LATEX] << "Noun enabled. Font: "
 739                                              << fcit->font().stateText(0)
 740                                              << endl;
 741                 }
 742                 switch (fcit->font().color()) {
 743                 case LColor::none:
 744                 case LColor::inherit:
 745                 case LColor::ignore:
 746                         // probably we should put here all interface colors used for
 747                         // font displaying! For now I just add this ones I know of (Jug)
 748                 case LColor::latex:
 749                 case LColor::note:
 750                         break;
 751                 default:
 752                         features.require("color");
 753                         lyxerr[Debug::LATEX] << "Color enabled. Font: "
 754                                              << fcit->font().stateText(0)
 755                                              << endl;
 756                 }
 757
 758                 Language const * language = fcit->font().language();
 759                 if (language->babel() != doc_language->babel() &&
 760                     language != ignore_language &&
 761                     language != latex_language)
 762                 {
 763                         features.useLanguage(language);
 764                         lyxerr[Debug::LATEX] << "Found language "
 765                                              << language->babel() << endl;
 766                 }
 767         }
 768
 769         if (!params.leftIndent().zero())
 770                 features.require("ParagraphLeftIndent");
 771
 772         // then the insets
 773         InsetList::const_iterator icit = owner_->insetlist.begin();
 774         InsetList::const_iterator iend = owner_->insetlist.end();
 775         for (; icit != iend; ++icit) {
 776                 if (icit->inset) {
 777                         icit->inset->validate(features);
 778                         if (layout.needprotect &&
 779                             icit->inset->lyxCode() == InsetBase::FOOT_CODE)
 780                                 features.require("NeedLyXFootnoteCode");
 781                 }
 782         }
 783
 784         // then the contents
 785         for (pos_type i = 0; i < size() ; ++i) {
 786                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 787                         if (!special_phrases[pnr].builtin
 788                             && isTextAt(special_phrases[pnr].phrase, i)) {
 789                                 features.require(special_phrases[pnr].phrase);
 790                                 break;
 791                         }
 792                 }
 793         }
 794 }
 795
 796
 797 } // namespace lyx