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