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 using lyx::pos_type;
  33
  34 using std::endl;
  35 using std::upper_bound;
  36 using std::lower_bound;
  37 using std::string;
  38 using std::ostream;
  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         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 bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
  94 {
  95         if (!tracking())
  96                 return false;
  97
  98         return changes_->isChange(start, end);
  99 }
 100
 101
 102 bool Paragraph::Pimpl::isChangeEdited(pos_type start, pos_type end) const
 103 {
 104         if (!tracking())
 105                 return false;
 106
 107         return changes_->isChangeEdited(start, end);
 108 }
 109
 110
 111 void Paragraph::Pimpl::setChangeType(pos_type pos, Change::Type type)
 112 {
 113         if (!tracking())
 114                 return;
 115
 116         changes_->set(type, pos);
 117 }
 118
 119
 120 void Paragraph::Pimpl::setChange(pos_type pos, Change change)
 121 {
 122         if (!tracking())
 123                 return;
 124
 125         changes_->set(change, pos);
 126 }
 127
 128
 129 Change const Paragraph::Pimpl::lookupChange(pos_type pos) const
 130 {
 131         if (!tracking())
 132                 return Change(Change::UNCHANGED);
 133
 134         return changes_->lookup(pos);
 135 }
 136
 137
 138 void Paragraph::Pimpl::markErased(bool erased)
 139 {
 140         BOOST_ASSERT(tracking());
 141
 142         if (erased) {
 143                 erase(0, size());
 144         } else {
 145                 for (pos_type i = 0; i < size(); ++i) {
 146                         changes_->set(Change::UNCHANGED, i);
 147                         if (owner_->isInset(i))
 148                                 owner_->getInset(i)->markErased(false);
 149                 }
 150         }
 151 }
 152
 153
 154 void Paragraph::Pimpl::acceptChange(pos_type start, pos_type end)
 155 {
 156         if (!tracking())
 157                 return;
 158
 159         if (!size()) {
 160                 changes_.reset(new Changes(Change::UNCHANGED));
 161                 return;
 162         }
 163
 164         lyxerr[Debug::CHANGES] << "acceptchange" << endl;
 165         pos_type i = start;
 166
 167         for (; i < end; ++i) {
 168                 switch (lookupChange(i).type) {
 169                         case Change::UNCHANGED:
 170                                 break;
 171
 172                         case Change::INSERTED:
 173                                 changes_->set(Change::UNCHANGED, i);
 174                                 break;
 175
 176                         case Change::DELETED:
 177                                 // Suppress access to nonexistent
 178                                 // "end-of-paragraph char":
 179                                 if (i < size()) {
 180                                         eraseIntern(i);
 181                                         changes_->erase(i);
 182                                         --end;
 183                                         --i;
 184                                 }
 185                                 break;
 186                 }
 187         }
 188
 189         lyxerr[Debug::CHANGES] << "endacceptchange" << endl;
 190         changes_->reset(Change::UNCHANGED);
 191 }
 192
 193
 194 void Paragraph::Pimpl::rejectChange(pos_type start, pos_type end)
 195 {
 196         if (!tracking())
 197                 return;
 198
 199         if (!size()) {
 200                 changes_.reset(new Changes(Change::UNCHANGED));
 201                 return;
 202         }
 203
 204         pos_type i = start;
 205
 206         for (; i < end; ++i) {
 207                 switch (lookupChange(i).type) {
 208                         case Change::UNCHANGED:
 209                                 break;
 210
 211                         case Change::INSERTED:
 212                                 if (i < size()) {
 213                                         eraseIntern(i);
 214                                         changes_->erase(i);
 215                                         --end;
 216                                         --i;
 217                                 }
 218                                 break;
 219
 220                         case Change::DELETED:
 221                                 changes_->set(Change::UNCHANGED, i);
 222                                 // No real char at position size():
 223                                 if (i < size() && owner_->isInset(i))
 224                                         owner_->getInset(i)->markErased(false);
 225                                 break;
 226                 }
 227         }
 228         changes_->reset(Change::UNCHANGED);
 229 }
 230
 231
 232 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 233 {
 234         return owner_->getChar(pos);
 235 }
 236
 237
 238 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c, Change change)
 239 {
 240         BOOST_ASSERT(pos <= size());
 241
 242         if (tracking()) {
 243                 changes_->record(change, pos);
 244         }
 245
 246         // This is actually very common when parsing buffers (and
 247         // maybe inserting ascii text)
 248         if (pos == size()) {
 249                 // when appending characters, no need to update tables
 250                 owner_->text_.push_back(c);
 251                 return;
 252         }
 253
 254         owner_->text_.insert(owner_->text_.begin() + pos, c);
 255
 256         // Update the font table.
 257         FontTable search_font(pos, LyXFont());
 258         for (FontList::iterator it = lower_bound(fontlist.begin(),
 259                                                       fontlist.end(),
 260                                                       search_font, matchFT());
 261              it != fontlist.end(); ++it)
 262         {
 263                 it->pos(it->pos() + 1);
 264         }
 265
 266         // Update the insets
 267         owner_->insetlist.increasePosAfterPos(pos);
 268 }
 269
 270
 271 void Paragraph::Pimpl::insertInset(pos_type pos,
 272                                    InsetBase * inset, Change change)
 273 {
 274         BOOST_ASSERT(inset);
 275         BOOST_ASSERT(pos <= size());
 276
 277         insertChar(pos, META_INSET, change);
 278         BOOST_ASSERT(owner_->text_[pos] == META_INSET);
 279
 280         // Add a new entry in the insetlist.
 281         owner_->insetlist.insert(inset, pos);
 282 }
 283
 284
 285 void Paragraph::Pimpl::eraseIntern(pos_type pos)
 286 {
 287         // if it is an inset, delete the inset entry
 288         if (owner_->text_[pos] == Paragraph::META_INSET) {
 289                 owner_->insetlist.erase(pos);
 290         }
 291
 292         owner_->text_.erase(owner_->text_.begin() + pos);
 293
 294         // Erase entries in the tables.
 295         FontTable search_font(pos, LyXFont());
 296
 297         FontList::iterator it =
 298                 lower_bound(fontlist.begin(),
 299                             fontlist.end(),
 300                             search_font, matchFT());
 301         if (it != fontlist.end() && it->pos() == pos &&
 302             (pos == 0 ||
 303              (it != fontlist.begin()
 304               && boost::prior(it)->pos() == pos - 1))) {
 305                 // If it is a multi-character font
 306                 // entry, we just make it smaller
 307                 // (see update below), otherwise we
 308                 // should delete it.
 309                 unsigned int const i = it - fontlist.begin();
 310                 fontlist.erase(fontlist.begin() + i);
 311                 it = fontlist.begin() + i;
 312                 if (i > 0 && i < fontlist.size() &&
 313                     fontlist[i - 1].font() == fontlist[i].font()) {
 314                         fontlist.erase(fontlist.begin() + i - 1);
 315                         it = fontlist.begin() + i - 1;
 316                 }
 317         }
 318
 319         // Update all other entries.
 320         FontList::iterator fend = fontlist.end();
 321         for (; it != fend; ++it)
 322                 it->pos(it->pos() - 1);
 323
 324         // Update the insetlist.
 325         owner_->insetlist.decreasePosAfterPos(pos);
 326 }
 327
 328
 329 bool Paragraph::Pimpl::erase(pos_type pos)
 330 {
 331         BOOST_ASSERT(pos <= size());
 332
 333         if (tracking()) {
 334                 Change::Type changetype(changes_->lookup(pos).type);
 335
 336                 // only allow the actual removal if it was /new/ text
 337                 if (changetype != Change::INSERTED) {
 338                         changes_->record(Change(Change::DELETED), pos);
 339                         if (pos < size() && owner_->isInset(pos))
 340                                 owner_->getInset(pos)->markErased(true);
 341                         return false;
 342                 }
 343         }
 344
 345         // Don't physically access nonexistent end-of-paragraph char
 346         if (pos < size()) {
 347                 eraseIntern(pos);
 348                 return true;
 349         }
 350
 351         return false;
 352 }
 353
 354
 355 int Paragraph::Pimpl::erase(pos_type start, pos_type end)
 356 {
 357         pos_type i = start;
 358         for (pos_type count = end - start; count; --count) {
 359                 if (!erase(i))
 360                         ++i;
 361         }
 362         return end - i;
 363 }
 364
 365
 366 void Paragraph::Pimpl::simpleTeXBlanks(ostream & os, TexRow & texrow,
 367                                        pos_type const i,
 368                                        unsigned int & column,
 369                                        LyXFont const & font,
 370                                        LyXLayout const & style)
 371 {
 372         if (style.pass_thru)
 373                 return;
 374
 375         if (column > lyxrc.ascii_linelen
 376             && i
 377             && getChar(i - 1) != ' '
 378             && (i < size() - 1)
 379             // same in FreeSpacing mode
 380             && !owner_->isFreeSpacing()
 381             // In typewriter mode, we want to avoid
 382             // ! . ? : at the end of a line
 383             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 384                  && (getChar(i - 1) == '.'
 385                      || getChar(i - 1) == '?'
 386                      || getChar(i - 1) == ':'
 387                      || getChar(i - 1) == '!'))) {
 388                 os << '\n';
 389                 texrow.newline();
 390                 texrow.start(owner_->id(), i + 1);
 391                 column = 0;
 392         } else if (style.free_spacing) {
 393                 os << '~';
 394         } else {
 395                 os << ' ';
 396         }
 397 }
 398
 399
 400 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 401 {
 402         pos_type const len = str.length();
 403
 404         // is the paragraph large enough?
 405         if (pos + len > size())
 406                 return false;
 407
 408         // does the wanted text start at point?
 409         for (string::size_type i = 0; i < str.length(); ++i) {
 410                 if (str[i] != owner_->text_[pos + i])
 411                         return false;
 412         }
 413
 414         // is there a font change in middle of the word?
 415         FontList::const_iterator cit = fontlist.begin();
 416         FontList::const_iterator end = fontlist.end();
 417         for (; cit != end; ++cit) {
 418                 if (cit->pos() >= pos)
 419                         break;
 420         }
 421         if (cit != end && pos + len - 1 > cit->pos())
 422                 return false;
 423
 424         return true;
 425 }
 426
 427
 428 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 429                                              BufferParams const & bparams,
 430                                              ostream & os,
 431                                              TexRow & texrow,
 432                                              OutputParams const & runparams,
 433                                              LyXFont & font,
 434                                              LyXFont & running_font,
 435                                              LyXFont & basefont,
 436                                              LyXFont const & outerfont,
 437                                              bool & open_font,
 438                                              Change::Type & running_change,
 439                                              LyXLayout const & style,
 440                                              pos_type & i,
 441                                              unsigned int & column,
 442                                              value_type const c)
 443 {
 444         if (style.pass_thru) {
 445                 if (c != Paragraph::META_INSET) {
 446                         if (c != '\0')
 447                                 os << c;
 448                 } else {
 449                         owner_->getInset(i)->plaintext(buf, os, runparams);
 450                 }
 451                 return;
 452         }
 453
 454         // Two major modes:  LaTeX or plain
 455         // Handle here those cases common to both modes
 456         // and then split to handle the two modes separately.
 457         switch (c) {
 458         case Paragraph::META_INSET: {
 459                 InsetBase * inset = owner_->getInset(i);
 460
 461                 // FIXME: remove this check
 462                 if (!inset)
 463                         break;
 464
 465                 // FIXME: move this to InsetNewline::latex
 466                 if (inset->lyxCode() == InsetBase::NEWLINE_CODE) {
 467                         // newlines are handled differently here than
 468                         // the default in simpleTeXSpecialChars().
 469                         if (!style.newline_allowed) {
 470                                 os << '\n';
 471                         } else {
 472                                 if (open_font) {
 473                                         column += running_font.latexWriteEndChanges(os, basefont, basefont);
 474                                         open_font = false;
 475                                 }
 476                                 basefont = owner_->getLayoutFont(bparams, outerfont);
 477                                 running_font = basefont;
 478
 479                                 if (font.family() == LyXFont::TYPEWRITER_FAMILY)
 480                                         os << '~';
 481
 482                                 if (runparams.moving_arg)
 483                                         os << "\\protect ";
 484
 485                                 os << "\\\\\n";
 486                         }
 487                         texrow.newline();
 488                         texrow.start(owner_->id(), i + 1);
 489                         column = 0;
 490                         break;
 491                 }
 492
 493                 // output change tracking marks only if desired,
 494                 // if dvipost is installed,
 495                 // and with dvi/ps (other formats don't work)
 496                 LaTeXFeatures features(buf, bparams, runparams);
 497                 bool const output = bparams.outputChanges
 498                         && runparams.flavor == OutputParams::LATEX
 499                         && features.isAvailable("dvipost");
 500
 501                 if (inset->canTrackChanges()) {
 502                         column += Changes::latexMarkChange(os, running_change,
 503                                 Change::UNCHANGED, output);
 504                         running_change = Change::UNCHANGED;
 505                 }
 506
 507                 bool close = false;
 508                 ostream::pos_type const len = os.tellp();
 509
 510                 if ((inset->lyxCode() == InsetBase::GRAPHICS_CODE
 511                      || inset->lyxCode() == InsetBase::MATH_CODE
 512                      || inset->lyxCode() == InsetBase::URL_CODE)
 513                     && running_font.isRightToLeft()) {
 514                         os << "\\L{";
 515                         close = true;
 516                 }
 517
 518 #ifdef WITH_WARNINGS
 519 #warning Bug: we can have an empty font change here!
 520 // if there has just been a font change, we are going to close it
 521 // right now, which means stupid latex code like \textsf{}. AFAIK,
 522 // this does not harm dvi output. A minor bug, thus (JMarc)
 523 #endif
 524                 // some insets cannot be inside a font change command
 525                 if (open_font && inset->noFontChange()) {
 526                         column +=running_font.
 527                                 latexWriteEndChanges(os,
 528                                                      basefont,
 529                                                      basefont);
 530                         open_font = false;
 531                         basefont = owner_->getLayoutFont(bparams, outerfont);
 532                         running_font = basefont;
 533                 }
 534
 535                 int tmp = inset->latex(buf, os, runparams);
 536
 537                 if (close)
 538                         os << '}';
 539
 540                 if (tmp) {
 541                         for (int j = 0; j < tmp; ++j) {
 542                                 texrow.newline();
 543                         }
 544                         texrow.start(owner_->id(), i + 1);
 545                         column = 0;
 546                 } else {
 547                         column += os.tellp() - len;
 548                 }
 549         }
 550         break;
 551
 552         default:
 553                 // And now for the special cases within each mode
 554
 555                 switch (c) {
 556                 case '\\':
 557                         os << "\\textbackslash{}";
 558                         column += 15;
 559                         break;
 560
 561                 case '±': case '²': case '³':
 562                 case '×': case '÷': case '¹':
 563                 case '¬': case 'µ':
 564                         if ((bparams.inputenc == "latin1" ||
 565                              bparams.inputenc == "latin9") ||
 566                             (bparams.inputenc == "auto" &&
 567                              (font.language()->encoding()->latexName()
 568                               == "latin1" ||
 569                               font.language()->encoding()->latexName()
 570                               == "latin9"))) {
 571                                 os << "\\ensuremath{"
 572                                    << c
 573                                    << '}';
 574                                 column += 13;
 575                         } else {
 576                                 os << c;
 577                         }
 578                         break;
 579
 580                 case '|': case '<': case '>':
 581                         // In T1 encoding, these characters exist
 582                         if (lyxrc.fontenc == "T1") {
 583                                 os << c;
 584                                 //... but we should avoid ligatures
 585                                 if ((c == '>' || c == '<')
 586                                     && i <= size() - 2
 587                                     && getChar(i + 1) == c) {
 588                                         //os << "\\textcompwordmark{}";
 589                                         // Jean-Marc, have a look at
 590                                         // this. I think this works
 591                                         // equally well:
 592                                         os << "\\,{}";
 593                                         // Lgb
 594                                         column += 19;
 595                                 }
 596                                 break;
 597                         }
 598                         // Typewriter font also has them
 599                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 600                                 os << c;
 601                                 break;
 602                         }
 603                         // Otherwise, we use what LaTeX
 604                         // provides us.
 605                         switch (c) {
 606                         case '<':
 607                                 os << "\\textless{}";
 608                                 column += 10;
 609                                 break;
 610                         case '>':
 611                                 os << "\\textgreater{}";
 612                                 column += 13;
 613                                 break;
 614                         case '|':
 615                                 os << "\\textbar{}";
 616                                 column += 9;
 617                                 break;
 618                         }
 619                         break;
 620
 621                 case '-': // "--" in Typewriter mode -> "-{}-"
 622                         if (i <= size() - 2
 623                             && getChar(i + 1) == '-'
 624                             && font.family() == LyXFont::TYPEWRITER_FAMILY) {
 625                                 os << "-{}";
 626                                 column += 2;
 627                         } else {
 628                                 os << '-';
 629                         }
 630                         break;
 631
 632                 case '\"':
 633                         os << "\\char`\\\"{}";
 634                         column += 9;
 635                         break;
 636
 637                 case '£':
 638                         if (bparams.inputenc == "default") {
 639                                 os << "\\pounds{}";
 640                                 column += 8;
 641                         } else {
 642                                 os << c;
 643                         }
 644                         break;
 645
 646                 case '$': case '&':
 647                 case '%': case '#': case '{':
 648                 case '}': case '_':
 649                         os << '\\' << c;
 650                         column += 1;
 651                         break;
 652
 653                 case '~':
 654                         os << "\\textasciitilde{}";
 655                         column += 16;
 656                         break;
 657
 658                 case '^':
 659                         os << "\\textasciicircum{}";
 660                         column += 17;
 661                         break;
 662
 663                 case '*': case '[':
 664                         // avoid being mistaken for optional arguments
 665                         os << '{' << c << '}';
 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 << 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 << 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 }