src/paragraph_pimpl.C

   1 /**
   2  * \file paragraph_pimpl.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Jean-Marc Lasgouttes
   8  * \author John Levon
   9  * \author André Pönitz
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "paragraph_pimpl.h"
  17
  18 #include "bufferparams.h"
  19 #include "debug.h"
  20 #include "encoding.h"
  21 #include "language.h"
  22 #include "LaTeXFeatures.h"
  23 #include "LColor.h"
  24 #include "lyxlength.h"
  25 #include "lyxrc.h"
  26 #include "outputparams.h"
  27 #include "texrow.h"
  28
  29
  30 using lyx::pos_type;
  31
  32 using std::endl;
  33 using std::upper_bound;
  34 using std::lower_bound;
  35 using std::string;
  36 using std::ostream;
  37
  38
  39 // Initialize static member.
  40 ShareContainer<LyXFont> Paragraph::Pimpl::FontTable::container;
  41 // Initialization of the counter for the paragraph id's,
  42 unsigned int Paragraph::Pimpl::paragraph_id = 0;
  43
  44 namespace {
  45
  46 struct special_phrase {
  47         string phrase;
  48         string macro;
  49         bool builtin;
  50 };
  51
  52 special_phrase special_phrases[] = {
  53         { "LyX", "\\LyX{}", false },
  54         { "TeX", "\\TeX{}", true },
  55         { "LaTeX2e", "\\LaTeXe{}", true },
  56         { "LaTeX", "\\LaTeX{}", true },
  57 };
  58
  59 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
  60
  61 } // namespace anon
  62
  63
  64 Paragraph::Pimpl::Pimpl(Paragraph * owner)
  65         : owner_(owner)
  66 {
  67         inset_owner = 0;
  68         id_ = paragraph_id++;
  69 }
  70
  71
  72 Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner)
  73         : params(p.params), owner_(owner)
  74 {
  75         inset_owner = p.inset_owner;
  76         fontlist = p.fontlist;
  77         id_ = paragraph_id++;
  78
  79         if (p.tracking())
  80                 changes_.reset(new Changes(*p.changes_.get()));
  81 }
  82
  83
  84 void Paragraph::Pimpl::setContentsFromPar(Paragraph const & par)
  85 {
  86         owner_->text_ = par.text_;
  87         if (par.pimpl_->tracking()) {
  88                 changes_.reset(new Changes(*(par.pimpl_->changes_.get())));
  89         }
  90 }
  91
  92
  93 void Paragraph::Pimpl::trackChanges(Change::Type type)
  94 {
  95         if (tracking()) {
  96                 lyxerr[Debug::CHANGES] << "already tracking for par " << id_ << endl;
  97                 return;
  98         }
  99
 100         lyxerr[Debug::CHANGES] << "track changes for par "
 101                 << id_ << " type " << type << endl;
 102         changes_.reset(new Changes(type));
 103         changes_->set(type, 0, size());
 104 }
 105
 106
 107 void Paragraph::Pimpl::untrackChanges()
 108 {
 109         changes_.reset(0);
 110 }
 111
 112
 113 void Paragraph::Pimpl::cleanChanges()
 114 {
 115         // if we're not tracking, we don't want to reset...
 116         if (!tracking())
 117                 return;
 118
 119         changes_.reset(new Changes(Change::INSERTED));
 120         changes_->set(Change::INSERTED, 0, size());
 121 }
 122
 123
 124 bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
 125 {
 126         if (!tracking())
 127                 return false;
 128
 129         return changes_->isChange(start, end);
 130 }
 131
 132
 133 bool Paragraph::Pimpl::isChangeEdited(pos_type start, pos_type end) const
 134 {
 135         if (!tracking())
 136                 return false;
 137
 138         return changes_->isChangeEdited(start, end);
 139 }
 140
 141
 142 void Paragraph::Pimpl::setChange(pos_type pos, Change::Type type)
 143 {
 144         if (!tracking())
 145                 return;
 146
 147         changes_->set(type, pos);
 148 }
 149
 150
 151 Change::Type Paragraph::Pimpl::lookupChange(pos_type pos) const
 152 {
 153         if (!tracking())
 154                 return Change::UNCHANGED;
 155
 156         return changes_->lookup(pos);
 157 }
 158
 159
 160 Change const Paragraph::Pimpl::lookupChangeFull(pos_type pos) const
 161 {
 162         if (!tracking())
 163                 return Change(Change::UNCHANGED);
 164
 165         return changes_->lookupFull(pos);
 166 }
 167
 168
 169 void Paragraph::Pimpl::markErased()
 170 {
 171         BOOST_ASSERT(tracking());
 172
 173         // FIXME: we should actually remove INSERTED chars.
 174         // difficult because owning insettexts/tabulars need
 175         // to update themselves when rows etc. change
 176         changes_->set(Change::DELETED, 0, size());
 177         changes_->reset(Change::DELETED);
 178 }
 179
 180
 181 void Paragraph::Pimpl::acceptChange(pos_type start, pos_type end)
 182 {
 183         if (!tracking())
 184                 return;
 185
 186         if (!size()) {
 187                 changes_.reset(new Changes(Change::UNCHANGED));
 188                 return;
 189         }
 190
 191         lyxerr << "acceptchange" << endl;
 192         pos_type i = start;
 193
 194         for (; i < end; ++i) {
 195                 switch (lookupChange(i)) {
 196                         case Change::UNCHANGED:
 197                                 break;
 198
 199                         case Change::INSERTED:
 200                                 changes_->set(Change::UNCHANGED, i);
 201                                 break;
 202
 203                         case Change::DELETED:
 204                                 eraseIntern(i);
 205                                 changes_->erase(i);
 206                                 --end;
 207                                 --i;
 208                                 break;
 209                 }
 210         }
 211
 212         lyxerr << "endacceptchange" << endl;
 213         changes_->reset(Change::UNCHANGED);
 214 }
 215
 216
 217 void Paragraph::Pimpl::rejectChange(pos_type start, pos_type end)
 218 {
 219         if (!tracking())
 220                 return;
 221
 222         if (!size()) {
 223                 changes_.reset(new Changes(Change::UNCHANGED));
 224                 return;
 225         }
 226
 227         pos_type i = start;
 228
 229         for (; i < end; ++i) {
 230                 switch (lookupChange(i)) {
 231                         case Change::UNCHANGED:
 232                                 break;
 233
 234                         case Change::INSERTED:
 235                                 eraseIntern(i);
 236                                 changes_->erase(i);
 237                                 --end;
 238                                 --i;
 239                                 break;
 240
 241                         case Change::DELETED:
 242                                 changes_->set(Change::UNCHANGED, i);
 243                                 break;
 244                 }
 245         }
 246         changes_->reset(Change::UNCHANGED);
 247 }
 248
 249
 250 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 251 {
 252         return owner_->getChar(pos);
 253 }
 254
 255
 256 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c, Change change)
 257 {
 258         BOOST_ASSERT(pos <= size());
 259
 260         if (tracking()) {
 261                 changes_->record(change, pos);
 262         }
 263
 264         // This is actually very common when parsing buffers (and
 265         // maybe inserting ascii text)
 266         if (pos == size()) {
 267                 // when appending characters, no need to update tables
 268                 owner_->text_.push_back(c);
 269                 return;
 270         }
 271
 272         owner_->text_.insert(owner_->text_.begin() + pos, c);
 273
 274         // Update the font table.
 275         FontTable search_font(pos, LyXFont());
 276         for (FontList::iterator it = lower_bound(fontlist.begin(),
 277                                                       fontlist.end(),
 278                                                       search_font, matchFT());
 279              it != fontlist.end(); ++it)
 280         {
 281                 it->pos(it->pos() + 1);
 282         }
 283
 284         // Update the insets
 285         owner_->insetlist.increasePosAfterPos(pos);
 286 }
 287
 288
 289 void Paragraph::Pimpl::insertInset(pos_type pos,
 290                                    InsetBase * inset, Change change)
 291 {
 292         BOOST_ASSERT(inset);
 293         BOOST_ASSERT(pos <= size());
 294
 295         insertChar(pos, META_INSET, change);
 296         BOOST_ASSERT(owner_->text_[pos] == META_INSET);
 297
 298         // Add a new entry in the insetlist.
 299         owner_->insetlist.insert(inset, pos);
 300 }
 301
 302
 303 void Paragraph::Pimpl::eraseIntern(pos_type pos)
 304 {
 305         // if it is an inset, delete the inset entry
 306         if (owner_->text_[pos] == Paragraph::META_INSET) {
 307                 owner_->insetlist.erase(pos);
 308         }
 309
 310         owner_->text_.erase(owner_->text_.begin() + pos);
 311
 312         // Erase entries in the tables.
 313         FontTable search_font(pos, LyXFont());
 314
 315         FontList::iterator it =
 316                 lower_bound(fontlist.begin(),
 317                             fontlist.end(),
 318                             search_font, matchFT());
 319         if (it != fontlist.end() && it->pos() == pos &&
 320             (pos == 0 ||
 321              (it != fontlist.begin()
 322               && boost::prior(it)->pos() == pos - 1))) {
 323                 // If it is a multi-character font
 324                 // entry, we just make it smaller
 325                 // (see update below), otherwise we
 326                 // should delete it.
 327                 unsigned int const i = it - fontlist.begin();
 328                 fontlist.erase(fontlist.begin() + i);
 329                 it = fontlist.begin() + i;
 330                 if (i > 0 && i < fontlist.size() &&
 331                     fontlist[i - 1].font() == fontlist[i].font()) {
 332                         fontlist.erase(fontlist.begin() + i - 1);
 333                         it = fontlist.begin() + i - 1;
 334                 }
 335         }
 336
 337         // Update all other entries.
 338         FontList::iterator fend = fontlist.end();
 339         for (; it != fend; ++it)
 340                 it->pos(it->pos() - 1);
 341
 342         // Update the insetlist.
 343         owner_->insetlist.decreasePosAfterPos(pos);
 344 }
 345
 346
 347 bool Paragraph::Pimpl::erase(pos_type pos)
 348 {
 349         BOOST_ASSERT(pos < size());
 350
 351         if (tracking()) {
 352                 Change::Type changetype(changes_->lookup(pos));
 353                 changes_->record(Change(Change::DELETED), pos);
 354
 355                 // only allow the actual removal if it was /new/ text
 356                 if (changetype != Change::INSERTED) {
 357                         if (owner_->text_[pos] == Paragraph::META_INSET) {
 358                                 owner_->getInset(pos)->markErased();
 359                         }
 360                         return false;
 361                 }
 362         }
 363
 364         eraseIntern(pos);
 365         return true;
 366 }
 367
 368
 369 int Paragraph::Pimpl::erase(pos_type start, pos_type end)
 370 {
 371         pos_type i = start;
 372         for (pos_type count = end - start; count; --count) {
 373                 if (!erase(i))
 374                         ++i;
 375         }
 376         return end - i;
 377 }
 378
 379
 380 void Paragraph::Pimpl::simpleTeXBlanks(ostream & os, TexRow & texrow,
 381                                        pos_type const i,
 382                                        unsigned int & column,
 383                                        LyXFont const & font,
 384                                        LyXLayout const & style)
 385 {
 386         if (style.pass_thru)
 387                 return;
 388
 389         if (column > lyxrc.ascii_linelen
 390             && i
 391             && getChar(i - 1) != ' '
 392             && (i < size() - 1)
 393             // same in FreeSpacing mode
 394             && !owner_->isFreeSpacing()
 395             // In typewriter mode, we want to avoid
 396             // ! . ? : at the end of a line
 397             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 398                  && (getChar(i - 1) == '.'
 399                      || getChar(i - 1) == '?'
 400                      || getChar(i - 1) == ':'
 401                      || getChar(i - 1) == '!'))) {
 402                 os << '\n';
 403                 texrow.newline();
 404                 texrow.start(owner_->id(), i + 1);
 405                 column = 0;
 406         } else if (style.free_spacing) {
 407                 os << '~';
 408         } else {
 409                 os << ' ';
 410         }
 411 }
 412
 413
 414 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 415 {
 416         pos_type const len = str.length();
 417
 418         // is the paragraph large enough?
 419         if (pos + len > size())
 420                 return false;
 421
 422         // does the wanted text start at point?
 423         for (string::size_type i = 0; i < str.length(); ++i) {
 424                 if (str[i] != owner_->text_[pos + i])
 425                         return false;
 426         }
 427
 428         // is there a font change in middle of the word?
 429         FontList::const_iterator cit = fontlist.begin();
 430         FontList::const_iterator end = fontlist.end();
 431         for (; cit != end; ++cit) {
 432                 if (cit->pos() >= pos)
 433                         break;
 434         }
 435         if (cit != end && pos + len - 1 > cit->pos())
 436                 return false;
 437
 438         return true;
 439 }
 440
 441
 442 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 443                                              BufferParams const & bparams,
 444                                              ostream & os,
 445                                              TexRow & texrow,
 446                                              OutputParams const & runparams,
 447                                              LyXFont & font,
 448                                              LyXFont & running_font,
 449                                              LyXFont & basefont,
 450                                              LyXFont const & outerfont,
 451                                              bool & open_font,
 452                                              Change::Type & running_change,
 453                                              LyXLayout const & style,
 454                                              pos_type & i,
 455                                              unsigned int & column,
 456                                              value_type const c)
 457 {
 458         if (style.pass_thru) {
 459                 if (c != Paragraph::META_INSET) {
 460                         if (c != '\0')
 461                                 os << c;
 462                 } else {
 463                         owner_->getInset(i)->plaintext(buf, os, runparams);
 464                 }
 465                 return;
 466         }
 467
 468         // Two major modes:  LaTeX or plain
 469         // Handle here those cases common to both modes
 470         // and then split to handle the two modes separately.
 471         switch (c) {
 472         case Paragraph::META_INSET: {
 473                 InsetBase * inset = owner_->getInset(i);
 474
 475                 // FIXME: remove this check
 476                 if (!inset)
 477                         break;
 478
 479                 // FIXME: move this to InsetNewline::latex
 480                 if (inset->lyxCode() == InsetBase::NEWLINE_CODE) {
 481                         // newlines are handled differently here than
 482                         // the default in simpleTeXSpecialChars().
 483                         if (!style.newline_allowed) {
 484                                 os << '\n';
 485                         } else {
 486                                 if (open_font) {
 487                                         column += running_font.latexWriteEndChanges(os, basefont, basefont);
 488                                         open_font = false;
 489                                 }
 490                                 basefont = owner_->getLayoutFont(bparams, outerfont);
 491                                 running_font = basefont;
 492
 493                                 if (font.family() == LyXFont::TYPEWRITER_FAMILY)
 494                                         os << '~';
 495
 496                                 if (runparams.moving_arg)
 497                                         os << "\\protect ";
 498
 499                                 os << "\\\\\n";
 500                         }
 501                         texrow.newline();
 502                         texrow.start(owner_->id(), i + 1);
 503                         column = 0;
 504                         break;
 505                 }
 506
 507                 if (inset->isTextInset()) {
 508                         column += Changes::latexMarkChange(os, running_change,
 509                                 Change::UNCHANGED);
 510                         running_change = Change::UNCHANGED;
 511                 }
 512
 513                 bool close = false;
 514                 ostream::pos_type const len = os.tellp();
 515
 516                 if ((inset->lyxCode() == InsetBase::GRAPHICS_CODE
 517                      || inset->lyxCode() == InsetBase::MATH_CODE
 518                      || inset->lyxCode() == InsetBase::URL_CODE)
 519                     && running_font.isRightToLeft()) {
 520                         os << "\\L{";
 521                         close = true;
 522                 }
 523
 524 #ifdef WITH_WARNINGS
 525 #warning Bug: we can have an empty font change here!
 526 // if there has just been a font change, we are going to close it
 527 // right now, which means stupid latex code like \textsf{}. AFAIK,
 528 // this does not harm dvi output. A minor bug, thus (JMarc)
 529 #endif
 530                 // some insets cannot be inside a font change command
 531                 if (open_font && inset->noFontChange()) {
 532                         column +=running_font.
 533                                 latexWriteEndChanges(os,
 534                                                      basefont,
 535                                                      basefont);
 536                         open_font = false;
 537                         basefont = owner_->getLayoutFont(bparams, outerfont);
 538                         running_font = basefont;
 539                 }
 540
 541                 int tmp = inset->latex(buf, os, runparams);
 542
 543                 if (close)
 544                         os << '}';
 545
 546                 if (tmp) {
 547                         for (int j = 0; j < tmp; ++j) {
 548                                 texrow.newline();
 549                         }
 550                         texrow.start(owner_->id(), i + 1);
 551                         column = 0;
 552                 } else {
 553                         column += os.tellp() - len;
 554                 }
 555         }
 556         break;
 557
 558         default:
 559                 // And now for the special cases within each mode
 560
 561                 switch (c) {
 562                 case '\\':
 563                         os << "\\textbackslash{}";
 564                         column += 15;
 565                         break;
 566
 567                 case '±': case '²': case '³':
 568                 case '×': case '÷': case '¹':
 569                 case '¬': case 'µ':
 570                         if ((bparams.inputenc == "latin1" ||
 571                              bparams.inputenc == "latin9") ||
 572                             (bparams.inputenc == "auto" &&
 573                              (font.language()->encoding()->LatexName()
 574                               == "latin1" ||
 575                               font.language()->encoding()->LatexName()
 576                               == "latin9"))) {
 577                                 os << "\\ensuremath{"
 578                                    << c
 579                                    << '}';
 580                                 column += 13;
 581                         } else {
 582                                 os << c;
 583                         }
 584                         break;
 585
 586                 case '|': case '<': case '>':
 587                         // In T1 encoding, these characters exist
 588                         if (lyxrc.fontenc == "T1") {
 589                                 os << c;
 590                                 //... but we should avoid ligatures
 591                                 if ((c == '>' || c == '<')
 592                                     && i <= size() - 2
 593                                     && getChar(i + 1) == c) {
 594                                         //os << "\\textcompwordmark{}";
 595                                         // Jean-Marc, have a look at
 596                                         // this. I think this works
 597                                         // equally well:
 598                                         os << "\\,{}";
 599                                         // Lgb
 600                                         column += 19;
 601                                 }
 602                                 break;
 603                         }
 604                         // Typewriter font also has them
 605                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 606                                 os << c;
 607                                 break;
 608                         }
 609                         // Otherwise, we use what LaTeX
 610                         // provides us.
 611                         switch (c) {
 612                         case '<':
 613                                 os << "\\textless{}";
 614                                 column += 10;
 615                                 break;
 616                         case '>':
 617                                 os << "\\textgreater{}";
 618                                 column += 13;
 619                                 break;
 620                         case '|':
 621                                 os << "\\textbar{}";
 622                                 column += 9;
 623                                 break;
 624                         }
 625                         break;
 626
 627                 case '-': // "--" in Typewriter mode -> "-{}-"
 628                         if (i <= size() - 2
 629                             && getChar(i + 1) == '-'
 630                             && font.family() == LyXFont::TYPEWRITER_FAMILY) {
 631                                 os << "-{}";
 632                                 column += 2;
 633                         } else {
 634                                 os << '-';
 635                         }
 636                         break;
 637
 638                 case '\"':
 639                         os << "\\char`\\\"{}";
 640                         column += 9;
 641                         break;
 642
 643                 case '£':
 644                         if (bparams.inputenc == "default") {
 645                                 os << "\\pounds{}";
 646                                 column += 8;
 647                         } else {
 648                                 os << c;
 649                         }
 650                         break;
 651
 652                 case '$': case '&':
 653                 case '%': case '#': case '{':
 654                 case '}': case '_':
 655                         os << '\\' << c;
 656                         column += 1;
 657                         break;
 658
 659                 case '~':
 660                         os << "\\textasciitilde{}";
 661                         column += 16;
 662                         break;
 663
 664                 case '^':
 665                         os << "\\textasciicircum{}";
 666                         column += 17;
 667                         break;
 668
 669                 case '*': case '[': case ']':
 670                         // avoid being mistaken for optional arguments
 671                         os << '{' << c << '}';
 672                         column += 2;
 673                         break;
 674
 675                 case ' ':
 676                         // Blanks are printed before font switching.
 677                         // Sure? I am not! (try nice-latex)
 678                         // I am sure it's correct. LyX might be smarter
 679                         // in the future, but for now, nothing wrong is
 680                         // written. (Asger)
 681                         break;
 682
 683                 default:
 684
 685                         // I assume this is hack treating typewriter as verbatim
 686                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 687                                 if (c != '\0') {
 688                                         os << c;
 689                                 }
 690                                 break;
 691                         }
 692
 693                         // LyX, LaTeX etc.
 694
 695                         // FIXME: if we have "LaTeX" with a font
 696                         // change in the middle (before the 'T', then
 697                         // the "TeX" part is still special cased.
 698                         // Really we should only operate this on
 699                         // "words" for some definition of word
 700
 701                         size_t pnr = 0;
 702
 703                         for (; pnr < phrases_nr; ++pnr) {
 704                                 if (isTextAt(special_phrases[pnr].phrase, i)) {
 705                                         os << special_phrases[pnr].macro;
 706                                         i += special_phrases[pnr].phrase.length() - 1;
 707                                         column += special_phrases[pnr].macro.length() - 1;
 708                                         break;
 709                                 }
 710                         }
 711
 712                         if (pnr == phrases_nr && c != '\0') {
 713                                 os << c;
 714                         }
 715                         break;
 716                 }
 717         }
 718 }
 719
 720
 721 void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 722                                 LyXLayout const & layout) const
 723 {
 724         BufferParams const & bparams = features.bufferParams();
 725
 726         // check the params.
 727         if (!params.spacing().isDefault())
 728                 features.require("setspace");
 729
 730         // then the layouts
 731         features.useLayout(layout.name());
 732
 733         // then the fonts
 734         Language const * doc_language = bparams.language;
 735
 736         FontList::const_iterator fcit = fontlist.begin();
 737         FontList::const_iterator fend = fontlist.end();
 738         for (; fcit != fend; ++fcit) {
 739                 if (fcit->font().noun() == LyXFont::ON) {
 740                         lyxerr[Debug::LATEX] << "font.noun: "
 741                                              << fcit->font().noun()
 742                                              << endl;
 743                         features.require("noun");
 744                         lyxerr[Debug::LATEX] << "Noun enabled. Font: "
 745                                              << fcit->font().stateText(0)
 746                                              << endl;
 747                 }
 748                 switch (fcit->font().color()) {
 749                 case LColor::none:
 750                 case LColor::inherit:
 751                 case LColor::ignore:
 752                         // probably we should put here all interface colors used for
 753                         // font displaying! For now I just add this ones I know of (Jug)
 754                 case LColor::latex:
 755                 case LColor::note:
 756                         break;
 757                 default:
 758                         features.require("color");
 759                         lyxerr[Debug::LATEX] << "Color enabled. Font: "
 760                                              << fcit->font().stateText(0)
 761                                              << endl;
 762                 }
 763
 764                 Language const * language = fcit->font().language();
 765                 if (language->babel() != doc_language->babel() &&
 766                     language != ignore_language &&
 767                     language != latex_language)
 768                 {
 769                         features.useLanguage(language);
 770                         lyxerr[Debug::LATEX] << "Found language "
 771                                              << language->babel() << endl;
 772                 }
 773         }
 774
 775         if (!params.leftIndent().zero())
 776                 features.require("ParagraphLeftIndent");
 777
 778         // then the insets
 779         InsetList::const_iterator icit = owner_->insetlist.begin();
 780         InsetList::const_iterator iend = owner_->insetlist.end();
 781         for (; icit != iend; ++icit) {
 782                 if (icit->inset) {
 783                         icit->inset->validate(features);
 784                         if (layout.needprotect &&
 785                             icit->inset->lyxCode() == InsetBase::FOOT_CODE)
 786                                 features.require("NeedLyXFootnoteCode");
 787                 }
 788         }
 789
 790         // then the contents
 791         for (pos_type i = 0; i < size() ; ++i) {
 792                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 793                         if (!special_phrases[pnr].builtin
 794                             && isTextAt(special_phrases[pnr].phrase, i)) {
 795                                 features.require(special_phrases[pnr].phrase);
 796                                 break;
 797                         }
 798                 }
 799         }
 800 }