src/paragraph_pimpl.C

   1 /**
   2  * \file paragraph_pimpl.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Jean-Marc Lasgouttes
   8  * \author John Levon
   9  * \author André Pönitz
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "paragraph_pimpl.h"
  17 #include "paragraph.h"
  18
  19 #include "bufferparams.h"
  20 #include "debug.h"
  21 #include "encoding.h"
  22 #include "language.h"
  23 #include "LaTeXFeatures.h"
  24 #include "LColor.h"
  25 #include "lyxlength.h"
  26 #include "lyxrc.h"
  27 #include "outputparams.h"
  28 #include "texrow.h"
  29
  30 #include <boost/next_prior.hpp>
  31
  32
  33 namespace lyx {
  34
  35 using std::endl;
  36 using std::upper_bound;
  37 using std::lower_bound;
  38 using std::string;
  39
  40
  41 // Initialization of the counter for the paragraph id's,
  42 unsigned int Paragraph::Pimpl::paragraph_id = 0;
  43
  44 namespace {
  45
  46 struct special_phrase {
  47         string phrase;
  48         docstring macro;
  49         bool builtin;
  50 };
  51
  52 special_phrase const special_phrases[] = {
  53         { "LyX", from_ascii("\\LyX{}"), false },
  54         { "TeX", from_ascii("\\TeX{}"), true },
  55         { "LaTeX2e", from_ascii("\\LaTeXe{}"), true },
  56         { "LaTeX", from_ascii("\\LaTeX{}"), true },
  57 };
  58
  59 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
  60
  61 } // namespace anon
  62
  63
  64 Paragraph::Pimpl::Pimpl(Paragraph * owner)
  65         : owner_(owner)
  66 {
  67         inset_owner = 0;
  68         id_ = paragraph_id++;
  69 }
  70
  71
  72 Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner)
  73         : params(p.params), changes_(p.changes_), owner_(owner)
  74 {
  75         inset_owner = p.inset_owner;
  76         fontlist = p.fontlist;
  77         id_ = paragraph_id++;
  78 }
  79
  80
  81 bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
  82 {
  83         BOOST_ASSERT(start >= 0 && start <= size());
  84         BOOST_ASSERT(end > start && end <= size() + 1);
  85
  86         return changes_.isChanged(start, end);
  87 }
  88
  89
  90 bool Paragraph::Pimpl::isMergedOnEndOfParDeletion(bool trackChanges) const {
  91         // keep the logic here in sync with the logic of eraseChars()
  92
  93         if (!trackChanges) {
  94                 return true;
  95         }
  96
  97         Change change = changes_.lookup(size());
  98
  99         return change.type == Change::INSERTED && change.author == 0;
 100 }
 101
 102
 103 void Paragraph::Pimpl::setChange(Change const & change)
 104 {
 105         // beware of the imaginary end-of-par character!
 106         changes_.set(change, 0, size() + 1);
 107
 108         /*
 109          * Propagate the change recursively - but not in case of DELETED!
 110          *
 111          * Imagine that your co-author makes changes in an existing inset. He
 112          * sends your document to you and you come to the conclusion that the
 113          * inset should go completely. If you erase it, LyX must not delete all
 114          * text within the inset. Otherwise, the change tracked insertions of
 115          * your co-author get lost and there is no way to restore them later.
 116          *
 117          * Conclusion: An inset's content should remain untouched if you delete it
 118          */
 119
 120         if (change.type != Change::DELETED) {
 121                 for (pos_type pos = 0; pos < size(); ++pos) {
 122                         if (owner_->isInset(pos)) {
 123                                 owner_->getInset(pos)->setChange(change);
 124                         }
 125                 }
 126         }
 127 }
 128
 129
 130 void Paragraph::Pimpl::setChange(pos_type pos, Change const & change)
 131 {
 132         BOOST_ASSERT(pos >= 0 && pos <= size());
 133
 134         changes_.set(change, pos);
 135
 136         // see comment in setChange(Change const &) above
 137
 138         if (change.type != Change::DELETED &&
 139             pos < size() && owner_->isInset(pos)) {
 140                 owner_->getInset(pos)->setChange(change);
 141         }
 142 }
 143
 144
 145 Change const & Paragraph::Pimpl::lookupChange(pos_type pos) const
 146 {
 147         BOOST_ASSERT(pos >= 0 && pos <= size());
 148
 149         return changes_.lookup(pos);
 150 }
 151
 152
 153 void Paragraph::Pimpl::acceptChanges(BufferParams const & bparams, pos_type start, pos_type end)
 154 {
 155         BOOST_ASSERT(start >= 0 && start <= size());
 156         BOOST_ASSERT(end > start && end <= size() + 1);
 157
 158         for (pos_type pos = start; pos < end; ++pos) {
 159                 switch (lookupChange(pos).type) {
 160                         case Change::UNCHANGED:
 161                                 // accept changes in nested inset
 162                                 if (pos < size() && owner_->isInset(pos)) {
 163                                         owner_->getInset(pos)->acceptChanges(bparams);
 164                                 }
 165
 166                                 break;
 167
 168                         case Change::INSERTED:
 169                                 changes_.set(Change(Change::UNCHANGED), pos);
 170                                 // also accept changes in nested inset
 171                                 if (pos < size() && owner_->isInset(pos)) {
 172                                         owner_->getInset(pos)->acceptChanges(bparams);
 173                                 }
 174                                 break;
 175
 176                         case Change::DELETED:
 177                                 // Suppress access to non-existent
 178                                 // "end-of-paragraph char"
 179                                 if (pos < size()) {
 180                                         eraseChar(pos, false);
 181                                         --end;
 182                                         --pos;
 183                                 }
 184                                 break;
 185                 }
 186
 187         }
 188 }
 189
 190
 191 void Paragraph::Pimpl::rejectChanges(BufferParams const & bparams, pos_type start, pos_type end)
 192 {
 193         BOOST_ASSERT(start >= 0 && start <= size());
 194         BOOST_ASSERT(end > start && end <= size() + 1);
 195
 196         for (pos_type pos = start; pos < end; ++pos) {
 197                 switch (lookupChange(pos).type) {
 198                         case Change::UNCHANGED:
 199                                 // reject changes in nested inset
 200                                 if (pos < size() && owner_->isInset(pos)) {
 201                                         owner_->getInset(pos)->rejectChanges(bparams);
 202                                 }
 203                                 break;
 204
 205                         case Change::INSERTED:
 206                                 // Suppress access to non-existent
 207                                 // "end-of-paragraph char"
 208                                 if (pos < size()) {
 209                                         eraseChar(pos, false);
 210                                         --end;
 211                                         --pos;
 212                                 }
 213                                 break;
 214
 215                         case Change::DELETED:
 216                                 changes_.set(Change(Change::UNCHANGED), pos);
 217
 218                                 // Do NOT reject changes within a deleted inset!
 219                                 // There may be insertions of a co-author inside of it!
 220
 221                                 break;
 222                 }
 223         }
 224 }
 225
 226
 227 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 228 {
 229         BOOST_ASSERT(pos >= 0 && pos <= size());
 230
 231         return owner_->getChar(pos);
 232 }
 233
 234
 235 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c, Change const & change)
 236 {
 237         BOOST_ASSERT(pos >= 0 && pos <= size());
 238
 239         // track change
 240         changes_.insert(change, pos);
 241
 242         // This is actually very common when parsing buffers (and
 243         // maybe inserting ascii text)
 244         if (pos == size()) {
 245                 // when appending characters, no need to update tables
 246                 owner_->text_.push_back(c);
 247                 return;
 248         }
 249
 250         owner_->text_.insert(owner_->text_.begin() + pos, c);
 251
 252         // Update the font table.
 253         FontTable search_font(pos, LyXFont());
 254         for (FontList::iterator it
 255               = lower_bound(fontlist.begin(), fontlist.end(), search_font, matchFT());
 256              it != fontlist.end(); ++it)
 257         {
 258                 it->pos(it->pos() + 1);
 259         }
 260
 261         // Update the insets
 262         owner_->insetlist.increasePosAfterPos(pos);
 263 }
 264
 265
 266 void Paragraph::Pimpl::insertInset(pos_type pos, InsetBase * inset,
 267                                    Change const & change)
 268 {
 269         BOOST_ASSERT(inset);
 270         BOOST_ASSERT(pos >= 0 && pos <= size());
 271
 272         insertChar(pos, META_INSET, change);
 273         BOOST_ASSERT(owner_->text_[pos] == META_INSET);
 274
 275         // Add a new entry in the insetlist.
 276         owner_->insetlist.insert(inset, pos);
 277 }
 278
 279
 280 bool Paragraph::Pimpl::eraseChar(pos_type pos, bool trackChanges)
 281 {
 282         BOOST_ASSERT(pos >= 0 && pos <= size());
 283
 284         // keep the logic here in sync with the logic of isMergedOnEndOfParDeletion()
 285
 286         if (trackChanges) {
 287                 Change change = changes_.lookup(pos);
 288
 289                 // set the character to DELETED if
 290                 //  a) it was previously unchanged or
 291                 //  b) it was inserted by a co-author
 292
 293                 if (change.type == Change::UNCHANGED ||
 294                     (change.type == Change::INSERTED && change.author != 0)) {
 295                         setChange(pos, Change(Change::DELETED));
 296                         return false;
 297                 }
 298
 299                 if (change.type == Change::DELETED)
 300                         return false;
 301         }
 302
 303         // Don't physically access the imaginary end-of-paragraph character.
 304         // eraseChar() can only mark it as DELETED. A physical deletion of
 305         // end-of-par must be handled externally.
 306         if (pos == size()) {
 307                 return false;
 308         }
 309
 310         // track change
 311         changes_.erase(pos);
 312
 313         // if it is an inset, delete the inset entry
 314         if (owner_->text_[pos] == Paragraph::META_INSET) {
 315                 owner_->insetlist.erase(pos);
 316         }
 317
 318         owner_->text_.erase(owner_->text_.begin() + pos);
 319
 320         // Erase entries in the tables.
 321         FontTable search_font(pos, LyXFont());
 322
 323         FontList::iterator it =
 324                 lower_bound(fontlist.begin(),
 325                             fontlist.end(),
 326                             search_font, matchFT());
 327         if (it != fontlist.end() && it->pos() == pos &&
 328             (pos == 0 ||
 329              (it != fontlist.begin()
 330               && boost::prior(it)->pos() == pos - 1))) {
 331                 // If it is a multi-character font
 332                 // entry, we just make it smaller
 333                 // (see update below), otherwise we
 334                 // should delete it.
 335                 unsigned int const i = it - fontlist.begin();
 336                 fontlist.erase(fontlist.begin() + i);
 337                 it = fontlist.begin() + i;
 338                 if (i > 0 && i < fontlist.size() &&
 339                     fontlist[i - 1].font() == fontlist[i].font()) {
 340                         fontlist.erase(fontlist.begin() + i - 1);
 341                         it = fontlist.begin() + i - 1;
 342                 }
 343         }
 344
 345         // Update all other entries
 346         FontList::iterator fend = fontlist.end();
 347         for (; it != fend; ++it)
 348                 it->pos(it->pos() - 1);
 349
 350         // Update the insetlist
 351         owner_->insetlist.decreasePosAfterPos(pos);
 352
 353         return true;
 354 }
 355
 356
 357 int Paragraph::Pimpl::eraseChars(pos_type start, pos_type end, bool trackChanges)
 358 {
 359         BOOST_ASSERT(start >= 0 && start <= size());
 360         BOOST_ASSERT(end >= start && end <= size() + 1);
 361
 362         pos_type i = start;
 363         for (pos_type count = end - start; count; --count) {
 364                 if (!eraseChar(i, trackChanges))
 365                         ++i;
 366         }
 367         return end - i;
 368 }
 369
 370
 371 int Paragraph::Pimpl::latexSurrogatePair(odocstream & os, value_type c,
 372                 value_type next, Encoding const & encoding)
 373 {
 374         // Writing next here may circumvent a possible font change between
 375         // c and next. Since next is only output if it forms a surrogate pair
 376         // with c we can ignore this:
 377         // A font change inside a surrogate pair does not make sense and is
 378         // hopefully impossible to input.
 379         // FIXME: change tracking
 380         // Is this correct WRT change tracking?
 381         docstring const latex1 = encoding.latexChar(next);
 382         docstring const latex2 = encoding.latexChar(c);
 383         os << latex1 << '{' << latex2 << '}';
 384         return latex1.length() + latex2.length() + 2;
 385 }
 386
 387
 388 bool Paragraph::Pimpl::simpleTeXBlanks(Encoding const & encoding,
 389                                        odocstream & os, TexRow & texrow,
 390                                        pos_type & i,
 391                                        unsigned int & column,
 392                                        LyXFont const & font,
 393                                        LyXLayout const & style)
 394 {
 395         if (style.pass_thru)
 396                 return false;
 397
 398         if (i < size() - 1) {
 399                 char_type next = getChar(i + 1);
 400                 if (Encodings::isCombiningChar(next)) {
 401                         // This space has an accent, so we must always output it.
 402                         column += latexSurrogatePair(os, ' ', next, encoding) - 1;
 403                         ++i;
 404                         return true;
 405                 }
 406         }
 407
 408         if (lyxrc.plaintext_linelen > 0
 409             && column > lyxrc.plaintext_linelen
 410             && i
 411             && getChar(i - 1) != ' '
 412             && (i < size() - 1)
 413             // same in FreeSpacing mode
 414             && !owner_->isFreeSpacing()
 415             // In typewriter mode, we want to avoid
 416             // ! . ? : at the end of a line
 417             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 418                  && (getChar(i - 1) == '.'
 419                      || getChar(i - 1) == '?'
 420                      || getChar(i - 1) == ':'
 421                      || getChar(i - 1) == '!'))) {
 422                 os << '\n';
 423                 texrow.newline();
 424                 texrow.start(owner_->id(), i + 1);
 425                 column = 0;
 426         } else if (style.free_spacing) {
 427                 os << '~';
 428         } else {
 429                 os << ' ';
 430         }
 431         return false;
 432 }
 433
 434
 435 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 436 {
 437         pos_type const len = str.length();
 438
 439         // is the paragraph large enough?
 440         if (pos + len > size())
 441                 return false;
 442
 443         // does the wanted text start at point?
 444         for (string::size_type i = 0; i < str.length(); ++i) {
 445                 // Caution: direct comparison of characters works only
 446                 // because str is pure ASCII.
 447                 if (str[i] != owner_->text_[pos + i])
 448                         return false;
 449         }
 450
 451         // is there a font change in middle of the word?
 452         FontList::const_iterator cit = fontlist.begin();
 453         FontList::const_iterator end = fontlist.end();
 454         for (; cit != end; ++cit) {
 455                 if (cit->pos() >= pos)
 456                         break;
 457         }
 458         if (cit != end && pos + len - 1 > cit->pos())
 459                 return false;
 460
 461         return true;
 462 }
 463
 464
 465 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 466                                              BufferParams const & bparams,
 467                                              odocstream & os,
 468                                              TexRow & texrow,
 469                                              OutputParams const & runparams,
 470                                              LyXFont & running_font,
 471                                              LyXFont & basefont,
 472                                              LyXFont const & outerfont,
 473                                              bool & open_font,
 474                                              Change::Type & running_change,
 475                                              LyXLayout const & style,
 476                                              pos_type & i,
 477                                              unsigned int & column,
 478                                              value_type const c)
 479 {
 480         if (style.pass_thru) {
 481                 if (c != Paragraph::META_INSET) {
 482                         if (c != '\0')
 483                                 // FIXME UNICODE: This can fail if c cannot
 484                                 // be encoded in the current encoding.
 485                                 os.put(c);
 486                 } else
 487                         owner_->getInset(i)->plaintext(buf, os, runparams);
 488                 return;
 489         }
 490
 491         // Two major modes:  LaTeX or plain
 492         // Handle here those cases common to both modes
 493         // and then split to handle the two modes separately.
 494         switch (c) {
 495         case Paragraph::META_INSET: {
 496                 InsetBase * inset = owner_->getInset(i);
 497
 498                 // FIXME: remove this check
 499                 if (!inset)
 500                         break;
 501
 502                 // FIXME: move this to InsetNewline::latex
 503                 if (inset->lyxCode() == InsetBase::NEWLINE_CODE) {
 504                         // newlines are handled differently here than
 505                         // the default in simpleTeXSpecialChars().
 506                         if (!style.newline_allowed) {
 507                                 os << '\n';
 508                         } else {
 509                                 if (open_font) {
 510                                         column += running_font.latexWriteEndChanges(
 511                                                 os, basefont, basefont);
 512                                         open_font = false;
 513                                 }
 514
 515                                 if (running_font.family() == LyXFont::TYPEWRITER_FAMILY)
 516                                         os << '~';
 517
 518                                 basefont = owner_->getLayoutFont(bparams, outerfont);
 519                                 running_font = basefont;
 520
 521                                 if (runparams.moving_arg)
 522                                         os << "\\protect ";
 523
 524                                 os << "\\\\\n";
 525                         }
 526                         texrow.newline();
 527                         texrow.start(owner_->id(), i + 1);
 528                         column = 0;
 529                         break;
 530                 }
 531
 532                 // output change tracking marks only if desired,
 533                 // if dvipost is installed,
 534                 // and with dvi/ps (other formats don't work)
 535                 LaTeXFeatures features(buf, bparams, runparams);
 536                 bool const output = bparams.outputChanges
 537                         && runparams.flavor == OutputParams::LATEX
 538                         && features.isAvailable("dvipost");
 539
 540                 if (inset->canTrackChanges()) {
 541                         column += Changes::latexMarkChange(os, running_change,
 542                                 Change::UNCHANGED, output);
 543                         running_change = Change::UNCHANGED;
 544                 }
 545
 546                 bool close = false;
 547                 odocstream::pos_type const len = os.tellp();
 548
 549                 if ((inset->lyxCode() == InsetBase::GRAPHICS_CODE
 550                      || inset->lyxCode() == InsetBase::MATH_CODE
 551                      || inset->lyxCode() == InsetBase::URL_CODE)
 552                     && running_font.isRightToLeft()) {
 553                         os << "\\L{";
 554                         close = true;
 555                 }
 556
 557 #ifdef WITH_WARNINGS
 558 #warning Bug: we can have an empty font change here!
 559 // if there has just been a font change, we are going to close it
 560 // right now, which means stupid latex code like \textsf{}. AFAIK,
 561 // this does not harm dvi output. A minor bug, thus (JMarc)
 562 #endif
 563                 // some insets cannot be inside a font change command
 564                 if (open_font && inset->noFontChange()) {
 565                         column += running_font.latexWriteEndChanges(
 566                                         os, basefont, basefont);
 567                         open_font = false;
 568                         basefont = owner_->getLayoutFont(bparams, outerfont);
 569                         running_font = basefont;
 570                 }
 571
 572                 int tmp = inset->latex(buf, os, runparams);
 573
 574                 if (close)
 575                         os << '}';
 576
 577                 if (tmp) {
 578                         for (int j = 0; j < tmp; ++j) {
 579                                 texrow.newline();
 580                         }
 581                         texrow.start(owner_->id(), i + 1);
 582                         column = 0;
 583                 } else {
 584                         column += os.tellp() - len;
 585                 }
 586         }
 587         break;
 588
 589         default:
 590                 // And now for the special cases within each mode
 591
 592                 switch (c) {
 593                 case '\\':
 594                         os << "\\textbackslash{}";
 595                         column += 15;
 596                         break;
 597
 598                 // The following characters could be written literally in latin1, but they
 599                 // would be wrongly converted on systems where char is signed, so we give
 600                 // the code points.
 601                 // This also makes us independant from the encoding of this source file.
 602                 case '|': case '<': case '>':
 603                         // In T1 encoding, these characters exist
 604                         if (lyxrc.fontenc == "T1") {
 605                                 os.put(c);
 606                                 //... but we should avoid ligatures
 607                                 if ((c == '>' || c == '<')
 608                                     && i <= size() - 2
 609                                     && getChar(i + 1) == c) {
 610                                         //os << "\\textcompwordmark{}";
 611                                         //column += 19;
 612                                         // Jean-Marc, have a look at
 613                                         // this. I think this works
 614                                         // equally well:
 615                                         os << "\\,{}";
 616                                         // Lgb
 617                                         column += 3;
 618                                 }
 619                                 break;
 620                         }
 621                         // Typewriter font also has them
 622                         if (running_font.family() == LyXFont::TYPEWRITER_FAMILY) {
 623                                 os.put(c);
 624                                 break;
 625                         }
 626                         // Otherwise, we use what LaTeX
 627                         // provides us.
 628                         switch (c) {
 629                         case '<':
 630                                 os << "\\textless{}";
 631                                 column += 10;
 632                                 break;
 633                         case '>':
 634                                 os << "\\textgreater{}";
 635                                 column += 13;
 636                                 break;
 637                         case '|':
 638                                 os << "\\textbar{}";
 639                                 column += 9;
 640                                 break;
 641                         }
 642                         break;
 643
 644                 case '-': // "--" in Typewriter mode -> "-{}-"
 645                         if (i <= size() - 2 &&
 646                             getChar(i + 1) == '-' &&
 647                             running_font.family() == LyXFont::TYPEWRITER_FAMILY) {
 648                                 os << "-{}";
 649                                 column += 2;
 650                         } else {
 651                                 os << '-';
 652                         }
 653                         break;
 654
 655                 case '\"':
 656                         os << "\\char`\\\"{}";
 657                         column += 9;
 658                         break;
 659
 660                 case '$': case '&':
 661                 case '%': case '#': case '{':
 662                 case '}': case '_':
 663                         os << '\\';
 664                         os.put(c);
 665                         column += 1;
 666                         break;
 667
 668                 case '~':
 669                         os << "\\textasciitilde{}";
 670                         column += 16;
 671                         break;
 672
 673                 case '^':
 674                         os << "\\textasciicircum{}";
 675                         column += 17;
 676                         break;
 677
 678                 case '*': case '[':
 679                         // avoid being mistaken for optional arguments
 680                         os << '{';
 681                         os.put(c);
 682                         os << '}';
 683                         column += 2;
 684                         break;
 685
 686                 case ' ':
 687                         // Blanks are printed before font switching.
 688                         // Sure? I am not! (try nice-latex)
 689                         // I am sure it's correct. LyX might be smarter
 690                         // in the future, but for now, nothing wrong is
 691                         // written. (Asger)
 692                         break;
 693
 694                 default:
 695
 696                         // I assume this is hack treating typewriter as verbatim
 697                         // FIXME UNICODE: This can fail if c cannot be encoded
 698                         // in the current encoding.
 699                         if (running_font.family() == LyXFont::TYPEWRITER_FAMILY) {
 700                                 if (c != '\0') {
 701                                         os.put(c);
 702                                 }
 703                                 break;
 704                         }
 705
 706                         // LyX, LaTeX etc.
 707
 708                         // FIXME: if we have "LaTeX" with a font
 709                         // change in the middle (before the 'T', then
 710                         // the "TeX" part is still special cased.
 711                         // Really we should only operate this on
 712                         // "words" for some definition of word
 713
 714                         size_t pnr = 0;
 715
 716                         for (; pnr < phrases_nr; ++pnr) {
 717                                 if (isTextAt(special_phrases[pnr].phrase, i)) {
 718                                         os << special_phrases[pnr].macro;
 719                                         i += special_phrases[pnr].phrase.length() - 1;
 720                                         column += special_phrases[pnr].macro.length() - 1;
 721                                         break;
 722                                 }
 723                         }
 724
 725                         if (pnr == phrases_nr && c != '\0') {
 726                                 Encoding const & encoding = *(runparams.encoding);
 727                                 if (i < size() - 1) {
 728                                         char_type next = getChar(i + 1);
 729                                         if (Encodings::isCombiningChar(next)) {
 730                                                 column += latexSurrogatePair(os, c, next, encoding) - 1;
 731                                                 ++i;
 732                                                 break;
 733                                         }
 734                                 }
 735                                 docstring const latex = encoding.latexChar(c);
 736                                 if (latex.length() > 1 &&
 737                                     latex[latex.length() - 1] != '}') {
 738                                         // Prevent eating of a following
 739                                         // space or command corruption by
 740                                         // following characters
 741                                         column += latex.length() + 1;
 742                                         os << latex << "{}";
 743                                 } else {
 744                                         column += latex.length() - 1;
 745                                         os << latex;
 746                                 }
 747                         }
 748                         break;
 749                 }
 750         }
 751 }
 752
 753
 754 void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 755                                 LyXLayout const & layout) const
 756 {
 757         BufferParams const & bparams = features.bufferParams();
 758
 759         // check the params.
 760         if (!params.spacing().isDefault())
 761                 features.require("setspace");
 762
 763         // then the layouts
 764         features.useLayout(layout.name());
 765
 766         // then the fonts
 767         Language const * doc_language = bparams.language;
 768
 769         FontList::const_iterator fcit = fontlist.begin();
 770         FontList::const_iterator fend = fontlist.end();
 771         for (; fcit != fend; ++fcit) {
 772                 if (fcit->font().noun() == LyXFont::ON) {
 773                         LYXERR(Debug::LATEX) << "font.noun: "
 774                                              << fcit->font().noun()
 775                                              << endl;
 776                         features.require("noun");
 777                         LYXERR(Debug::LATEX) << "Noun enabled. Font: "
 778                                              << to_utf8(fcit->font().stateText(0))
 779                                              << endl;
 780                 }
 781                 switch (fcit->font().color()) {
 782                 case LColor::none:
 783                 case LColor::inherit:
 784                 case LColor::ignore:
 785                         // probably we should put here all interface colors used for
 786                         // font displaying! For now I just add this ones I know of (Jug)
 787                 case LColor::latex:
 788                 case LColor::note:
 789                         break;
 790                 default:
 791                         features.require("color");
 792                         LYXERR(Debug::LATEX) << "Color enabled. Font: "
 793                                              << to_utf8(fcit->font().stateText(0))
 794                                              << endl;
 795                 }
 796
 797                 Language const * language = fcit->font().language();
 798                 if (language->babel() != doc_language->babel() &&
 799                     language != ignore_language &&
 800                     language != latex_language)
 801                 {
 802                         features.useLanguage(language);
 803                         LYXERR(Debug::LATEX) << "Found language "
 804                                              << language->babel() << endl;
 805                 }
 806         }
 807
 808         if (!params.leftIndent().zero())
 809                 features.require("ParagraphLeftIndent");
 810
 811         // then the insets
 812         InsetList::const_iterator icit = owner_->insetlist.begin();
 813         InsetList::const_iterator iend = owner_->insetlist.end();
 814         for (; icit != iend; ++icit) {
 815                 if (icit->inset) {
 816                         icit->inset->validate(features);
 817                         if (layout.needprotect &&
 818                             icit->inset->lyxCode() == InsetBase::FOOT_CODE)
 819                                 features.require("NeedLyXFootnoteCode");
 820                 }
 821         }
 822
 823         // then the contents
 824         for (pos_type i = 0; i < size() ; ++i) {
 825                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 826                         if (!special_phrases[pnr].builtin
 827                             && isTextAt(special_phrases[pnr].phrase, i)) {
 828                                 features.require(special_phrases[pnr].phrase);
 829                                 break;
 830                         }
 831                 }
 832                 Encodings::validate(getChar(i), features);
 833         }
 834 }
 835
 836
 837 } // namespace lyx