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         // FIXME: change tracking (MG)
  96         if (!tracking())
  97                 return false;
  98
  99         return changes_->isChange(start, end);
 100 }
 101
 102
 103 void Paragraph::Pimpl::setChange(Change const & change)
 104 {
 105         // FIXME: change tracking (MG)
 106         // changes_.set(change, 0, size());
 107
 108         if (change.type == Change::UNCHANGED) { // only for UNCHANGED ???
 109                 for (pos_type i = 0; i < size(); ++i) {
 110                         if (owner_->isInset(i)) {
 111                                 // FIXME: change tracking (MG)
 112                                 // owner_->getInset(i)->setChange(change);
 113                         }
 114                 }
 115         }
 116 }
 117
 118
 119 void Paragraph::Pimpl::setChangeType(pos_type pos, Change::Type type)
 120 {
 121         if (!tracking())
 122                 return;
 123
 124         changes_->set(type, pos);
 125 }
 126
 127
 128 void Paragraph::Pimpl::setChange(pos_type pos, Change const & change)
 129 {
 130         if (!tracking())
 131                 return;
 132
 133         changes_->set(change, pos);
 134 }
 135
 136
 137 Change const Paragraph::Pimpl::lookupChange(pos_type pos) const
 138 {
 139         if (!tracking())
 140                 return Change(Change::UNCHANGED);
 141
 142         return changes_->lookup(pos);
 143 }
 144
 145
 146 void Paragraph::Pimpl::acceptChange(pos_type start, pos_type end)
 147 {
 148         if (!tracking())
 149                 return;
 150
 151         if (!size()) {
 152                 changes_.reset(new Changes(Change::UNCHANGED));
 153                 return;
 154         }
 155
 156         lyxerr[Debug::CHANGES] << "acceptchange" << endl;
 157         pos_type i = start;
 158
 159         for (; i < end; ++i) {
 160                 switch (lookupChange(i).type) {
 161                         case Change::UNCHANGED:
 162                                 break;
 163
 164                         case Change::INSERTED:
 165                                 changes_->set(Change::UNCHANGED, i);
 166                                 break;
 167
 168                         case Change::DELETED:
 169                                 // Suppress access to nonexistent
 170                                 // "end-of-paragraph char":
 171                                 if (i < size()) {
 172                                         eraseIntern(i);
 173                                         changes_->erase(i);
 174                                         --end;
 175                                         --i;
 176                                 }
 177                                 break;
 178                 }
 179         }
 180
 181         lyxerr[Debug::CHANGES] << "endacceptchange" << endl;
 182         changes_->reset(Change::UNCHANGED);
 183 }
 184
 185
 186 void Paragraph::Pimpl::rejectChange(pos_type start, pos_type end)
 187 {
 188         if (!tracking())
 189                 return;
 190
 191         if (!size()) {
 192                 changes_.reset(new Changes(Change::UNCHANGED));
 193                 return;
 194         }
 195
 196         pos_type i = start;
 197
 198         for (; i < end; ++i) {
 199                 switch (lookupChange(i).type) {
 200                         case Change::UNCHANGED:
 201                                 break;
 202
 203                         case Change::INSERTED:
 204                                 if (i < size()) {
 205                                         eraseIntern(i);
 206                                         changes_->erase(i);
 207                                         --end;
 208                                         --i;
 209                                 }
 210                                 break;
 211
 212                         case Change::DELETED:
 213                                 changes_->set(Change::UNCHANGED, i);
 214                                 // No real char at position size():
 215                                 if (i < size() && owner_->isInset(i))
 216                                         owner_->getInset(i)->markErased(false);
 217                                 break;
 218                 }
 219         }
 220         changes_->reset(Change::UNCHANGED);
 221 }
 222
 223
 224 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 225 {
 226         return owner_->getChar(pos);
 227 }
 228
 229
 230 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c, Change const & change)
 231 {
 232         BOOST_ASSERT(pos <= size());
 233
 234         if (tracking()) {
 235                 changes_->record(change, pos);
 236         }
 237
 238         // This is actually very common when parsing buffers (and
 239         // maybe inserting ascii text)
 240         if (pos == size()) {
 241                 // when appending characters, no need to update tables
 242                 owner_->text_.push_back(c);
 243                 return;
 244         }
 245
 246         owner_->text_.insert(owner_->text_.begin() + pos, c);
 247
 248         // Update the font table.
 249         FontTable search_font(pos, LyXFont());
 250         for (FontList::iterator it = lower_bound(fontlist.begin(),
 251                                                       fontlist.end(),
 252                                                       search_font, matchFT());
 253              it != fontlist.end(); ++it)
 254         {
 255                 it->pos(it->pos() + 1);
 256         }
 257
 258         // Update the insets
 259         owner_->insetlist.increasePosAfterPos(pos);
 260 }
 261
 262
 263 void Paragraph::Pimpl::insertInset(pos_type pos,
 264                                    InsetBase * inset, Change const & change)
 265 {
 266         BOOST_ASSERT(inset);
 267         BOOST_ASSERT(pos <= size());
 268
 269         insertChar(pos, META_INSET, change);
 270         BOOST_ASSERT(owner_->text_[pos] == META_INSET);
 271
 272         // Add a new entry in the insetlist.
 273         owner_->insetlist.insert(inset, pos);
 274 }
 275
 276
 277 void Paragraph::Pimpl::eraseIntern(pos_type pos)
 278 {
 279         // if it is an inset, delete the inset entry
 280         if (owner_->text_[pos] == Paragraph::META_INSET) {
 281                 owner_->insetlist.erase(pos);
 282         }
 283
 284         owner_->text_.erase(owner_->text_.begin() + pos);
 285
 286         // Erase entries in the tables.
 287         FontTable search_font(pos, LyXFont());
 288
 289         FontList::iterator it =
 290                 lower_bound(fontlist.begin(),
 291                             fontlist.end(),
 292                             search_font, matchFT());
 293         if (it != fontlist.end() && it->pos() == pos &&
 294             (pos == 0 ||
 295              (it != fontlist.begin()
 296               && boost::prior(it)->pos() == pos - 1))) {
 297                 // If it is a multi-character font
 298                 // entry, we just make it smaller
 299                 // (see update below), otherwise we
 300                 // should delete it.
 301                 unsigned int const i = it - fontlist.begin();
 302                 fontlist.erase(fontlist.begin() + i);
 303                 it = fontlist.begin() + i;
 304                 if (i > 0 && i < fontlist.size() &&
 305                     fontlist[i - 1].font() == fontlist[i].font()) {
 306                         fontlist.erase(fontlist.begin() + i - 1);
 307                         it = fontlist.begin() + i - 1;
 308                 }
 309         }
 310
 311         // Update all other entries.
 312         FontList::iterator fend = fontlist.end();
 313         for (; it != fend; ++it)
 314                 it->pos(it->pos() - 1);
 315
 316         // Update the insetlist.
 317         owner_->insetlist.decreasePosAfterPos(pos);
 318 }
 319
 320
 321 bool Paragraph::Pimpl::erase(pos_type pos)
 322 {
 323         BOOST_ASSERT(pos <= size());
 324
 325         if (tracking()) {
 326                 Change::Type changetype(changes_->lookup(pos).type);
 327
 328                 // only allow the actual removal if it was /new/ text
 329                 if (changetype != Change::INSERTED) {
 330                         changes_->record(Change(Change::DELETED), pos);
 331                         if (pos < size() && owner_->isInset(pos))
 332                                 owner_->getInset(pos)->markErased(true);
 333                         return false;
 334                 }
 335         }
 336
 337         // Don't physically access nonexistent end-of-paragraph char
 338         if (pos < size()) {
 339                 eraseIntern(pos);
 340                 return true;
 341         }
 342
 343         return false;
 344 }
 345
 346
 347 int Paragraph::Pimpl::erase(pos_type start, pos_type end)
 348 {
 349         pos_type i = start;
 350         for (pos_type count = end - start; count; --count) {
 351                 if (!erase(i))
 352                         ++i;
 353         }
 354         return end - i;
 355 }
 356
 357
 358 void Paragraph::Pimpl::simpleTeXBlanks(ostream & os, TexRow & texrow,
 359                                        pos_type const i,
 360                                        unsigned int & column,
 361                                        LyXFont const & font,
 362                                        LyXLayout const & style)
 363 {
 364         if (style.pass_thru)
 365                 return;
 366
 367         if (column > lyxrc.ascii_linelen
 368             && i
 369             && getChar(i - 1) != ' '
 370             && (i < size() - 1)
 371             // same in FreeSpacing mode
 372             && !owner_->isFreeSpacing()
 373             // In typewriter mode, we want to avoid
 374             // ! . ? : at the end of a line
 375             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 376                  && (getChar(i - 1) == '.'
 377                      || getChar(i - 1) == '?'
 378                      || getChar(i - 1) == ':'
 379                      || getChar(i - 1) == '!'))) {
 380                 os << '\n';
 381                 texrow.newline();
 382                 texrow.start(owner_->id(), i + 1);
 383                 column = 0;
 384         } else if (style.free_spacing) {
 385                 os << '~';
 386         } else {
 387                 os << ' ';
 388         }
 389 }
 390
 391
 392 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 393 {
 394         pos_type const len = str.length();
 395
 396         // is the paragraph large enough?
 397         if (pos + len > size())
 398                 return false;
 399
 400         // does the wanted text start at point?
 401         for (string::size_type i = 0; i < str.length(); ++i) {
 402                 if (str[i] != owner_->text_[pos + i])
 403                         return false;
 404         }
 405
 406         // is there a font change in middle of the word?
 407         FontList::const_iterator cit = fontlist.begin();
 408         FontList::const_iterator end = fontlist.end();
 409         for (; cit != end; ++cit) {
 410                 if (cit->pos() >= pos)
 411                         break;
 412         }
 413         if (cit != end && pos + len - 1 > cit->pos())
 414                 return false;
 415
 416         return true;
 417 }
 418
 419
 420 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 421                                              BufferParams const & bparams,
 422                                              ostream & os,
 423                                              TexRow & texrow,
 424                                              OutputParams const & runparams,
 425                                              LyXFont & font,
 426                                              LyXFont & running_font,
 427                                              LyXFont & basefont,
 428                                              LyXFont const & outerfont,
 429                                              bool & open_font,
 430                                              Change::Type & running_change,
 431                                              LyXLayout const & style,
 432                                              pos_type & i,
 433                                              unsigned int & column,
 434                                              value_type const c)
 435 {
 436         if (style.pass_thru) {
 437                 if (c != Paragraph::META_INSET) {
 438                         if (c != '\0')
 439                                 os << c;
 440                 } else {
 441                         lyx::odocstringstream oss;
 442                         owner_->getInset(i)->plaintext(buf, oss, runparams);
 443                         // FIXME UNICODE
 444                         os << lyx::to_utf8(oss.str());
 445                 }
 446                 return;
 447         }
 448
 449         // Two major modes:  LaTeX or plain
 450         // Handle here those cases common to both modes
 451         // and then split to handle the two modes separately.
 452         switch (c) {
 453         case Paragraph::META_INSET: {
 454                 InsetBase * inset = owner_->getInset(i);
 455
 456                 // FIXME: remove this check
 457                 if (!inset)
 458                         break;
 459
 460                 // FIXME: move this to InsetNewline::latex
 461                 if (inset->lyxCode() == InsetBase::NEWLINE_CODE) {
 462                         // newlines are handled differently here than
 463                         // the default in simpleTeXSpecialChars().
 464                         if (!style.newline_allowed) {
 465                                 os << '\n';
 466                         } else {
 467                                 if (open_font) {
 468                                         column += running_font.latexWriteEndChanges(os, basefont, basefont);
 469                                         open_font = false;
 470                                 }
 471                                 basefont = owner_->getLayoutFont(bparams, outerfont);
 472                                 running_font = basefont;
 473
 474                                 if (font.family() == LyXFont::TYPEWRITER_FAMILY)
 475                                         os << '~';
 476
 477                                 if (runparams.moving_arg)
 478                                         os << "\\protect ";
 479
 480                                 os << "\\\\\n";
 481                         }
 482                         texrow.newline();
 483                         texrow.start(owner_->id(), i + 1);
 484                         column = 0;
 485                         break;
 486                 }
 487
 488                 // output change tracking marks only if desired,
 489                 // if dvipost is installed,
 490                 // and with dvi/ps (other formats don't work)
 491                 LaTeXFeatures features(buf, bparams, runparams);
 492                 bool const output = bparams.outputChanges
 493                         && runparams.flavor == OutputParams::LATEX
 494                         && features.isAvailable("dvipost");
 495
 496                 if (inset->canTrackChanges()) {
 497                         column += Changes::latexMarkChange(os, running_change,
 498                                 Change::UNCHANGED, output);
 499                         running_change = Change::UNCHANGED;
 500                 }
 501
 502                 bool close = false;
 503                 ostream::pos_type const len = os.tellp();
 504
 505                 if ((inset->lyxCode() == InsetBase::GRAPHICS_CODE
 506                      || inset->lyxCode() == InsetBase::MATH_CODE
 507                      || inset->lyxCode() == InsetBase::URL_CODE)
 508                     && running_font.isRightToLeft()) {
 509                         os << "\\L{";
 510                         close = true;
 511                 }
 512
 513 #ifdef WITH_WARNINGS
 514 #warning Bug: we can have an empty font change here!
 515 // if there has just been a font change, we are going to close it
 516 // right now, which means stupid latex code like \textsf{}. AFAIK,
 517 // this does not harm dvi output. A minor bug, thus (JMarc)
 518 #endif
 519                 // some insets cannot be inside a font change command
 520                 if (open_font && inset->noFontChange()) {
 521                         column +=running_font.
 522                                 latexWriteEndChanges(os,
 523                                                      basefont,
 524                                                      basefont);
 525                         open_font = false;
 526                         basefont = owner_->getLayoutFont(bparams, outerfont);
 527                         running_font = basefont;
 528                 }
 529
 530                 int tmp = inset->latex(buf, os, runparams);
 531
 532                 if (close)
 533                         os << '}';
 534
 535                 if (tmp) {
 536                         for (int j = 0; j < tmp; ++j) {
 537                                 texrow.newline();
 538                         }
 539                         texrow.start(owner_->id(), i + 1);
 540                         column = 0;
 541                 } else {
 542                         column += os.tellp() - len;
 543                 }
 544         }
 545         break;
 546
 547         default:
 548                 // And now for the special cases within each mode
 549
 550                 switch (c) {
 551                 case '\\':
 552                         os << "\\textbackslash{}";
 553                         column += 15;
 554                         break;
 555
 556                 case '±': case '²': case '³':
 557                 case '×': case '÷': case '¹':
 558                 case '¬': case 'µ':
 559                         if ((bparams.inputenc == "latin1" ||
 560                              bparams.inputenc == "latin9") ||
 561                             (bparams.inputenc == "auto" &&
 562                              (font.language()->encoding()->latexName()
 563                               == "latin1" ||
 564                               font.language()->encoding()->latexName()
 565                               == "latin9"))) {
 566                                 os << "\\ensuremath{"
 567                                    << c
 568                                    << '}';
 569                                 column += 13;
 570                         } else {
 571                                 os << c;
 572                         }
 573                         break;
 574
 575                 case '|': case '<': case '>':
 576                         // In T1 encoding, these characters exist
 577                         if (lyxrc.fontenc == "T1") {
 578                                 os << c;
 579                                 //... but we should avoid ligatures
 580                                 if ((c == '>' || c == '<')
 581                                     && i <= size() - 2
 582                                     && getChar(i + 1) == c) {
 583                                         //os << "\\textcompwordmark{}";
 584                                         // Jean-Marc, have a look at
 585                                         // this. I think this works
 586                                         // equally well:
 587                                         os << "\\,{}";
 588                                         // Lgb
 589                                         column += 19;
 590                                 }
 591                                 break;
 592                         }
 593                         // Typewriter font also has them
 594                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 595                                 os << c;
 596                                 break;
 597                         }
 598                         // Otherwise, we use what LaTeX
 599                         // provides us.
 600                         switch (c) {
 601                         case '<':
 602                                 os << "\\textless{}";
 603                                 column += 10;
 604                                 break;
 605                         case '>':
 606                                 os << "\\textgreater{}";
 607                                 column += 13;
 608                                 break;
 609                         case '|':
 610                                 os << "\\textbar{}";
 611                                 column += 9;
 612                                 break;
 613                         }
 614                         break;
 615
 616                 case '-': // "--" in Typewriter mode -> "-{}-"
 617                         if (i <= size() - 2
 618                             && getChar(i + 1) == '-'
 619                             && font.family() == LyXFont::TYPEWRITER_FAMILY) {
 620                                 os << "-{}";
 621                                 column += 2;
 622                         } else {
 623                                 os << '-';
 624                         }
 625                         break;
 626
 627                 case '\"':
 628                         os << "\\char`\\\"{}";
 629                         column += 9;
 630                         break;
 631
 632                 case '£':
 633                         if (bparams.inputenc == "default") {
 634                                 os << "\\pounds{}";
 635                                 column += 8;
 636                         } else {
 637                                 os << c;
 638                         }
 639                         break;
 640
 641                 case '$': case '&':
 642                 case '%': case '#': case '{':
 643                 case '}': case '_':
 644                         os << '\\' << c;
 645                         column += 1;
 646                         break;
 647
 648                 case '~':
 649                         os << "\\textasciitilde{}";
 650                         column += 16;
 651                         break;
 652
 653                 case '^':
 654                         os << "\\textasciicircum{}";
 655                         column += 17;
 656                         break;
 657
 658                 case '*': case '[':
 659                         // avoid being mistaken for optional arguments
 660                         os << '{' << c << '}';
 661                         column += 2;
 662                         break;
 663
 664                 case ' ':
 665                         // Blanks are printed before font switching.
 666                         // Sure? I am not! (try nice-latex)
 667                         // I am sure it's correct. LyX might be smarter
 668                         // in the future, but for now, nothing wrong is
 669                         // written. (Asger)
 670                         break;
 671
 672                 default:
 673
 674                         // I assume this is hack treating typewriter as verbatim
 675                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 676                                 if (c != '\0') {
 677                                         os << c;
 678                                 }
 679                                 break;
 680                         }
 681
 682                         // LyX, LaTeX etc.
 683
 684                         // FIXME: if we have "LaTeX" with a font
 685                         // change in the middle (before the 'T', then
 686                         // the "TeX" part is still special cased.
 687                         // Really we should only operate this on
 688                         // "words" for some definition of word
 689
 690                         size_t pnr = 0;
 691
 692                         for (; pnr < phrases_nr; ++pnr) {
 693                                 if (isTextAt(special_phrases[pnr].phrase, i)) {
 694                                         os << special_phrases[pnr].macro;
 695                                         i += special_phrases[pnr].phrase.length() - 1;
 696                                         column += special_phrases[pnr].macro.length() - 1;
 697                                         break;
 698                                 }
 699                         }
 700
 701                         if (pnr == phrases_nr && c != '\0') {
 702                                 os << c;
 703                         }
 704                         break;
 705                 }
 706         }
 707 }
 708
 709
 710 void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 711                                 LyXLayout const & layout) const
 712 {
 713         BufferParams const & bparams = features.bufferParams();
 714
 715         // check the params.
 716         if (!params.spacing().isDefault())
 717                 features.require("setspace");
 718
 719         // then the layouts
 720         features.useLayout(layout.name());
 721
 722         // then the fonts
 723         Language const * doc_language = bparams.language;
 724
 725         FontList::const_iterator fcit = fontlist.begin();
 726         FontList::const_iterator fend = fontlist.end();
 727         for (; fcit != fend; ++fcit) {
 728                 if (fcit->font().noun() == LyXFont::ON) {
 729                         lyxerr[Debug::LATEX] << "font.noun: "
 730                                              << fcit->font().noun()
 731                                              << endl;
 732                         features.require("noun");
 733                         lyxerr[Debug::LATEX] << "Noun enabled. Font: "
 734                                              << fcit->font().stateText(0)
 735                                              << endl;
 736                 }
 737                 switch (fcit->font().color()) {
 738                 case LColor::none:
 739                 case LColor::inherit:
 740                 case LColor::ignore:
 741                         // probably we should put here all interface colors used for
 742                         // font displaying! For now I just add this ones I know of (Jug)
 743                 case LColor::latex:
 744                 case LColor::note:
 745                         break;
 746                 default:
 747                         features.require("color");
 748                         lyxerr[Debug::LATEX] << "Color enabled. Font: "
 749                                              << fcit->font().stateText(0)
 750                                              << endl;
 751                 }
 752
 753                 Language const * language = fcit->font().language();
 754                 if (language->babel() != doc_language->babel() &&
 755                     language != ignore_language &&
 756                     language != latex_language)
 757                 {
 758                         features.useLanguage(language);
 759                         lyxerr[Debug::LATEX] << "Found language "
 760                                              << language->babel() << endl;
 761                 }
 762         }
 763
 764         if (!params.leftIndent().zero())
 765                 features.require("ParagraphLeftIndent");
 766
 767         // then the insets
 768         InsetList::const_iterator icit = owner_->insetlist.begin();
 769         InsetList::const_iterator iend = owner_->insetlist.end();
 770         for (; icit != iend; ++icit) {
 771                 if (icit->inset) {
 772                         icit->inset->validate(features);
 773                         if (layout.needprotect &&
 774                             icit->inset->lyxCode() == InsetBase::FOOT_CODE)
 775                                 features.require("NeedLyXFootnoteCode");
 776                 }
 777         }
 778
 779         // then the contents
 780         for (pos_type i = 0; i < size() ; ++i) {
 781                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 782                         if (!special_phrases[pnr].builtin
 783                             && isTextAt(special_phrases[pnr].phrase, i)) {
 784                                 features.require(special_phrases[pnr].phrase);
 785                                 break;
 786                         }
 787                 }
 788         }
 789 }