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
  62 bool isEncoding(BufferParams const & bparams, LyXFont const & font,
  63                 string const & encoding)
  64 {
  65         return (bparams.inputenc == encoding
  66                 || (bparams.inputenc == "auto"
  67                     && font.language()->encoding()->latexName() == encoding));
  68 }
  69
  70 } // namespace anon
  71
  72
  73 Paragraph::Pimpl::Pimpl(Paragraph * owner)
  74         : owner_(owner)
  75 {
  76         inset_owner = 0;
  77         id_ = paragraph_id++;
  78 }
  79
  80
  81 Paragraph::Pimpl::Pimpl(Pimpl const & p, Paragraph * owner)
  82         : params(p.params), changes_(p.changes_), owner_(owner)
  83 {
  84         inset_owner = p.inset_owner;
  85         fontlist = p.fontlist;
  86         id_ = paragraph_id++;
  87 }
  88
  89
  90 bool Paragraph::Pimpl::isChanged(pos_type start, pos_type end) const
  91 {
  92         BOOST_ASSERT(start >= 0 && start <= size());
  93         BOOST_ASSERT(end > start && end <= size() + 1);
  94
  95         return changes_.isChanged(start, end);
  96 }
  97
  98
  99 bool Paragraph::Pimpl::isMergedOnEndOfParDeletion(bool trackChanges) const {
 100         // keep the logic here in sync with the logic of eraseChars()
 101
 102         if (!trackChanges) {
 103                 return true;
 104         }
 105
 106         Change change = changes_.lookup(size());
 107
 108         return change.type == Change::INSERTED && change.author == 0;
 109 }
 110
 111
 112 void Paragraph::Pimpl::setChange(Change const & change)
 113 {
 114         // beware of the imaginary end-of-par character!
 115         changes_.set(change, 0, size() + 1);
 116
 117         /*
 118          * Propagate the change recursively - but not in case of DELETED!
 119          *
 120          * Imagine that your co-author makes changes in an existing inset. He
 121          * sends your document to you and you come to the conclusion that the
 122          * inset should go completely. If you erase it, LyX must not delete all
 123          * text within the inset. Otherwise, the change tracked insertions of
 124          * your co-author get lost and there is no way to restore them later.
 125          *
 126          * Conclusion: An inset's content should remain untouched if you delete it
 127          */
 128
 129         if (change.type != Change::DELETED) {
 130                 for (pos_type pos = 0; pos < size(); ++pos) {
 131                         if (owner_->isInset(pos)) {
 132                                 owner_->getInset(pos)->setChange(change);
 133                         }
 134                 }
 135         }
 136 }
 137
 138
 139 void Paragraph::Pimpl::setChange(pos_type pos, Change const & change)
 140 {
 141         BOOST_ASSERT(pos >= 0 && pos <= size());
 142
 143         changes_.set(change, pos);
 144
 145         // see comment in setChange(Change const &) above
 146
 147         if (change.type != Change::DELETED &&
 148             pos < size() && owner_->isInset(pos)) {
 149                 owner_->getInset(pos)->setChange(change);
 150         }
 151 }
 152
 153
 154 Change const Paragraph::Pimpl::lookupChange(pos_type pos) const
 155 {
 156         BOOST_ASSERT(pos >= 0 && pos <= size());
 157
 158         return changes_.lookup(pos);
 159 }
 160
 161
 162 void Paragraph::Pimpl::acceptChanges(pos_type start, pos_type end)
 163 {
 164         BOOST_ASSERT(start >= 0 && start <= size());
 165         BOOST_ASSERT(end > start && end <= size() + 1);
 166
 167         for (pos_type pos = start; pos < end; ++pos) {
 168                 switch (lookupChange(pos).type) {
 169                         case Change::UNCHANGED:
 170                                 // accept changes in nested inset
 171                                 if (pos < size() && owner_->isInset(pos)) {
 172                                         owner_->getInset(pos)->acceptChanges();
 173                                 }
 174
 175                                 break;
 176
 177                         case Change::INSERTED:
 178                                 changes_.set(Change(Change::UNCHANGED), pos);
 179                                 // also accept changes in nested inset
 180                                 if (pos < size() && owner_->isInset(pos)) {
 181                                         owner_->getInset(pos)->acceptChanges();
 182                                 }
 183                                 break;
 184
 185                         case Change::DELETED:
 186                                 // Suppress access to non-existent
 187                                 // "end-of-paragraph char"
 188                                 if (pos < size()) {
 189                                         eraseChar(pos, false);
 190                                         --end;
 191                                         --pos;
 192                                 }
 193                                 break;
 194                 }
 195
 196         }
 197 }
 198
 199
 200 void Paragraph::Pimpl::rejectChanges(pos_type start, pos_type end)
 201 {
 202         BOOST_ASSERT(start >= 0 && start <= size());
 203         BOOST_ASSERT(end > start && end <= size() + 1);
 204
 205         for (pos_type pos = start; pos < end; ++pos) {
 206                 switch (lookupChange(pos).type) {
 207                         case Change::UNCHANGED:
 208                                 // reject changes in nested inset
 209                                 if (pos < size() && owner_->isInset(pos)) {
 210                                         owner_->getInset(pos)->rejectChanges();
 211                                 }
 212                                 break;
 213
 214                         case Change::INSERTED:
 215                                 // Suppress access to non-existent
 216                                 // "end-of-paragraph char"
 217                                 if (pos < size()) {
 218                                         eraseChar(pos, false);
 219                                         --end;
 220                                         --pos;
 221                                 }
 222                                 break;
 223
 224                         case Change::DELETED:
 225                                 changes_.set(Change(Change::UNCHANGED), pos);
 226
 227                                 // Do NOT reject changes within a deleted inset!
 228                                 // There may be insertions of a co-author inside of it!
 229
 230                                 break;
 231                 }
 232         }
 233 }
 234
 235
 236 Paragraph::value_type Paragraph::Pimpl::getChar(pos_type pos) const
 237 {
 238         BOOST_ASSERT(pos >= 0 && pos <= size());
 239
 240         return owner_->getChar(pos);
 241 }
 242
 243
 244 void Paragraph::Pimpl::insertChar(pos_type pos, value_type c, Change const & change)
 245 {
 246         BOOST_ASSERT(pos >= 0 && pos <= size());
 247
 248         // track change
 249         changes_.insert(change, pos);
 250
 251         // This is actually very common when parsing buffers (and
 252         // maybe inserting ascii text)
 253         if (pos == size()) {
 254                 // when appending characters, no need to update tables
 255                 owner_->text_.push_back(c);
 256                 return;
 257         }
 258
 259         owner_->text_.insert(owner_->text_.begin() + pos, c);
 260
 261         // Update the font table.
 262         FontTable search_font(pos, LyXFont());
 263         for (FontList::iterator it
 264               = lower_bound(fontlist.begin(), fontlist.end(), search_font, matchFT());
 265              it != fontlist.end(); ++it)
 266         {
 267                 it->pos(it->pos() + 1);
 268         }
 269
 270         // Update the insets
 271         owner_->insetlist.increasePosAfterPos(pos);
 272 }
 273
 274
 275 void Paragraph::Pimpl::insertInset(pos_type pos, InsetBase * inset,
 276                                    Change const & change)
 277 {
 278         BOOST_ASSERT(inset);
 279         BOOST_ASSERT(pos >= 0 && pos <= size());
 280
 281         insertChar(pos, META_INSET, change);
 282         BOOST_ASSERT(owner_->text_[pos] == META_INSET);
 283
 284         // Add a new entry in the insetlist.
 285         owner_->insetlist.insert(inset, pos);
 286 }
 287
 288
 289 bool Paragraph::Pimpl::eraseChar(pos_type pos, bool trackChanges)
 290 {
 291         BOOST_ASSERT(pos >= 0 && pos <= size());
 292
 293         // keep the logic here in sync with the logic of isMergedOnEndOfParDeletion()
 294
 295         if (trackChanges) {
 296                 Change change = changes_.lookup(pos);
 297
 298                 // set the character to DELETED if
 299                 //  a) it was previously unchanged or
 300                 //  b) it was inserted by a co-author
 301
 302                 if (change.type == Change::UNCHANGED ||
 303                     (change.type == Change::INSERTED && change.author != 0)) {
 304                         setChange(pos, Change(Change::DELETED));
 305                         return false;
 306                 }
 307
 308                 if (change.type == Change::DELETED)
 309                         return false;
 310         }
 311
 312         // Don't physically access the imaginary end-of-paragraph character.
 313         // eraseChar() can only mark it as DELETED. A physical deletion of
 314         // end-of-par must be handled externally.
 315         if (pos == size()) {
 316                 return false;
 317         }
 318
 319         // track change
 320         changes_.erase(pos);
 321
 322         // if it is an inset, delete the inset entry
 323         if (owner_->text_[pos] == Paragraph::META_INSET) {
 324                 owner_->insetlist.erase(pos);
 325         }
 326
 327         owner_->text_.erase(owner_->text_.begin() + pos);
 328
 329         // Erase entries in the tables.
 330         FontTable search_font(pos, LyXFont());
 331
 332         FontList::iterator it =
 333                 lower_bound(fontlist.begin(),
 334                             fontlist.end(),
 335                             search_font, matchFT());
 336         if (it != fontlist.end() && it->pos() == pos &&
 337             (pos == 0 ||
 338              (it != fontlist.begin()
 339               && boost::prior(it)->pos() == pos - 1))) {
 340                 // If it is a multi-character font
 341                 // entry, we just make it smaller
 342                 // (see update below), otherwise we
 343                 // should delete it.
 344                 unsigned int const i = it - fontlist.begin();
 345                 fontlist.erase(fontlist.begin() + i);
 346                 it = fontlist.begin() + i;
 347                 if (i > 0 && i < fontlist.size() &&
 348                     fontlist[i - 1].font() == fontlist[i].font()) {
 349                         fontlist.erase(fontlist.begin() + i - 1);
 350                         it = fontlist.begin() + i - 1;
 351                 }
 352         }
 353
 354         // Update all other entries
 355         FontList::iterator fend = fontlist.end();
 356         for (; it != fend; ++it)
 357                 it->pos(it->pos() - 1);
 358
 359         // Update the insetlist
 360         owner_->insetlist.decreasePosAfterPos(pos);
 361
 362         return true;
 363 }
 364
 365
 366 int Paragraph::Pimpl::eraseChars(pos_type start, pos_type end, bool trackChanges)
 367 {
 368         BOOST_ASSERT(start >= 0 && start <= size());
 369         BOOST_ASSERT(end >= start && end <= size() + 1);
 370
 371         pos_type i = start;
 372         for (pos_type count = end - start; count; --count) {
 373                 if (!eraseChar(i, trackChanges))
 374                         ++i;
 375         }
 376         return end - i;
 377 }
 378
 379
 380 void Paragraph::Pimpl::simpleTeXBlanks(odocstream & os, TexRow & texrow,
 381                                        pos_type const i,
 382                                        unsigned int & column,
 383                                        LyXFont const & font,
 384                                        LyXLayout const & style)
 385 {
 386         if (style.pass_thru)
 387                 return;
 388
 389         if (column > lyxrc.ascii_linelen
 390             && i
 391             && getChar(i - 1) != ' '
 392             && (i < size() - 1)
 393             // same in FreeSpacing mode
 394             && !owner_->isFreeSpacing()
 395             // In typewriter mode, we want to avoid
 396             // ! . ? : at the end of a line
 397             && !(font.family() == LyXFont::TYPEWRITER_FAMILY
 398                  && (getChar(i - 1) == '.'
 399                      || getChar(i - 1) == '?'
 400                      || getChar(i - 1) == ':'
 401                      || getChar(i - 1) == '!'))) {
 402                 os << '\n';
 403                 texrow.newline();
 404                 texrow.start(owner_->id(), i + 1);
 405                 column = 0;
 406         } else if (style.free_spacing) {
 407                 os << '~';
 408         } else {
 409                 os << ' ';
 410         }
 411 }
 412
 413
 414 bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 415 {
 416         pos_type const len = str.length();
 417
 418         // is the paragraph large enough?
 419         if (pos + len > size())
 420                 return false;
 421
 422         // does the wanted text start at point?
 423         for (string::size_type i = 0; i < str.length(); ++i) {
 424                 if (str[i] != owner_->text_[pos + i])
 425                         return false;
 426         }
 427
 428         // is there a font change in middle of the word?
 429         FontList::const_iterator cit = fontlist.begin();
 430         FontList::const_iterator end = fontlist.end();
 431         for (; cit != end; ++cit) {
 432                 if (cit->pos() >= pos)
 433                         break;
 434         }
 435         if (cit != end && pos + len - 1 > cit->pos())
 436                 return false;
 437
 438         return true;
 439 }
 440
 441
 442 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 443                                              BufferParams const & bparams,
 444                                              odocstream & os,
 445                                              TexRow & texrow,
 446                                              OutputParams const & runparams,
 447                                              LyXFont & font,
 448                                              LyXFont & running_font,
 449                                              LyXFont & basefont,
 450                                              LyXFont const & outerfont,
 451                                              bool & open_font,
 452                                              Change::Type & running_change,
 453                                              LyXLayout const & style,
 454                                              pos_type & i,
 455                                              unsigned int & column,
 456                                              value_type const c)
 457 {
 458         if (style.pass_thru) {
 459                 if (c != Paragraph::META_INSET) {
 460                         if (c != '\0')
 461                                 os.put(c);
 462                 } else
 463                         owner_->getInset(i)->plaintext(buf, os, runparams);
 464                 return;
 465         }
 466
 467         // Two major modes:  LaTeX or plain
 468         // Handle here those cases common to both modes
 469         // and then split to handle the two modes separately.
 470         switch (c) {
 471         case Paragraph::META_INSET: {
 472                 InsetBase * inset = owner_->getInset(i);
 473
 474                 // FIXME: remove this check
 475                 if (!inset)
 476                         break;
 477
 478                 // FIXME: move this to InsetNewline::latex
 479                 if (inset->lyxCode() == InsetBase::NEWLINE_CODE) {
 480                         // newlines are handled differently here than
 481                         // the default in simpleTeXSpecialChars().
 482                         if (!style.newline_allowed) {
 483                                 os << '\n';
 484                         } else {
 485                                 if (open_font) {
 486                                         column += running_font.latexWriteEndChanges(os, basefont, basefont);
 487                                         open_font = false;
 488                                 }
 489                                 basefont = owner_->getLayoutFont(bparams, outerfont);
 490                                 running_font = basefont;
 491
 492                                 if (font.family() == LyXFont::TYPEWRITER_FAMILY)
 493                                         os << '~';
 494
 495                                 if (runparams.moving_arg)
 496                                         os << "\\protect ";
 497
 498                                 os << "\\\\\n";
 499                         }
 500                         texrow.newline();
 501                         texrow.start(owner_->id(), i + 1);
 502                         column = 0;
 503                         break;
 504                 }
 505
 506                 // output change tracking marks only if desired,
 507                 // if dvipost is installed,
 508                 // and with dvi/ps (other formats don't work)
 509                 LaTeXFeatures features(buf, bparams, runparams);
 510                 bool const output = bparams.outputChanges
 511                         && runparams.flavor == OutputParams::LATEX
 512                         && features.isAvailable("dvipost");
 513
 514                 if (inset->canTrackChanges()) {
 515                         column += Changes::latexMarkChange(os, running_change,
 516                                 Change::UNCHANGED, output);
 517                         running_change = Change::UNCHANGED;
 518                 }
 519
 520                 bool close = false;
 521                 odocstream::pos_type const len = os.tellp();
 522
 523                 if ((inset->lyxCode() == InsetBase::GRAPHICS_CODE
 524                      || inset->lyxCode() == InsetBase::MATH_CODE
 525                      || inset->lyxCode() == InsetBase::URL_CODE)
 526                     && running_font.isRightToLeft()) {
 527                         os << "\\L{";
 528                         close = true;
 529                 }
 530
 531 #ifdef WITH_WARNINGS
 532 #warning Bug: we can have an empty font change here!
 533 // if there has just been a font change, we are going to close it
 534 // right now, which means stupid latex code like \textsf{}. AFAIK,
 535 // this does not harm dvi output. A minor bug, thus (JMarc)
 536 #endif
 537                 // some insets cannot be inside a font change command
 538                 if (open_font && inset->noFontChange()) {
 539                         column +=running_font.
 540                                 latexWriteEndChanges(os,
 541                                                      basefont,
 542                                                      basefont);
 543                         open_font = false;
 544                         basefont = owner_->getLayoutFont(bparams, outerfont);
 545                         running_font = basefont;
 546                 }
 547
 548                 int tmp = inset->latex(buf, os, runparams);
 549
 550                 if (close)
 551                         os << '}';
 552
 553                 if (tmp) {
 554                         for (int j = 0; j < tmp; ++j) {
 555                                 texrow.newline();
 556                         }
 557                         texrow.start(owner_->id(), i + 1);
 558                         column = 0;
 559                 } else {
 560                         column += os.tellp() - len;
 561                 }
 562         }
 563         break;
 564
 565         default:
 566                 // And now for the special cases within each mode
 567
 568                 switch (c) {
 569                 case '\\':
 570                         os << "\\textbackslash{}";
 571                         column += 15;
 572                         break;
 573
 574                 // The following characters could be written literally in latin1, but they
 575                 // would be wrongly converted on systems where char is signed, so we give
 576                 // the code points.
 577                 // This also makes us independant from the encoding of this source file.
 578                 case 0xb1:    // ± PLUS-MINUS SIGN
 579                 case 0xb2:    // ² SUPERSCRIPT TWO
 580                 case 0xb3:    // ³ SUPERSCRIPT THREE
 581                 case 0xd7:    // × MULTIPLICATION SIGN
 582                 case 0xf7:    // ÷ DIVISION SIGN
 583                 case 0xb9:    // ¹ SUPERSCRIPT ONE
 584                 case 0xac:    // ¬ NOT SIGN
 585                 case 0xb5:    // µ MICRO SIGN
 586                         if (isEncoding(bparams, font, "latin1")
 587                             || isEncoding(bparams, font, "latin9")) {
 588                                 os << "\\ensuremath{";
 589                                 os.put(c);
 590                                 os << '}';
 591                                 column += 13;
 592                         } else {
 593                                 os.put(c);
 594                         }
 595                         break;
 596
 597                 case '|': case '<': case '>':
 598                         // In T1 encoding, these characters exist
 599                         if (lyxrc.fontenc == "T1") {
 600                                 os.put(c);
 601                                 //... but we should avoid ligatures
 602                                 if ((c == '>' || c == '<')
 603                                     && i <= size() - 2
 604                                     && getChar(i + 1) == c) {
 605                                         //os << "\\textcompwordmark{}";
 606                                         // Jean-Marc, have a look at
 607                                         // this. I think this works
 608                                         // equally well:
 609                                         os << "\\,{}";
 610                                         // Lgb
 611                                         column += 19;
 612                                 }
 613                                 break;
 614                         }
 615                         // Typewriter font also has them
 616                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 617                                 os.put(c);
 618                                 break;
 619                         }
 620                         // Otherwise, we use what LaTeX
 621                         // provides us.
 622                         switch (c) {
 623                         case '<':
 624                                 os << "\\textless{}";
 625                                 column += 10;
 626                                 break;
 627                         case '>':
 628                                 os << "\\textgreater{}";
 629                                 column += 13;
 630                                 break;
 631                         case '|':
 632                                 os << "\\textbar{}";
 633                                 column += 9;
 634                                 break;
 635                         }
 636                         break;
 637
 638                 case '-': // "--" in Typewriter mode -> "-{}-"
 639                         if (i <= size() - 2
 640                             && getChar(i + 1) == '-'
 641                             && font.family() == LyXFont::TYPEWRITER_FAMILY) {
 642                                 os << "-{}";
 643                                 column += 2;
 644                         } else {
 645                                 os << '-';
 646                         }
 647                         break;
 648
 649                 case '\"':
 650                         os << "\\char`\\\"{}";
 651                         column += 9;
 652                         break;
 653
 654                 case 0xa3:    // £ POUND SIGN
 655                         if (bparams.inputenc == "default") {
 656                                 os << "\\pounds{}";
 657                                 column += 8;
 658                         } else {
 659                                 os.put(c);
 660                         }
 661                         break;
 662
 663                 case 0x20ac:    // EURO SIGN
 664                         if (isEncoding(bparams, font, "latin9")
 665                             || isEncoding(bparams, font, "cp1251")
 666                             || isEncoding(bparams, font, "utf8")) {
 667                                 os.put(c);
 668                         } else {
 669                                 os << "\\texteuro{}";
 670                                 column += 10;
 671                         }
 672                         break;
 673
 674                 // These characters are covered by latin1, but not
 675                 // by latin9 (a.o.). We have to support them because
 676                 // we switched the default of latin1-languages to latin9
 677                 case 0xa4:    // CURRENCY SYMBOL
 678                 case 0xa6:    // BROKEN BAR
 679                 case 0xa8:    // DIAERESIS
 680                 case 0xb4:    // ACUTE ACCENT
 681                 case 0xb8:    // CEDILLA
 682                 case 0xbd:    // 1/2 FRACTION
 683                 case 0xbc:    // 1/4 FRACTION
 684                 case 0xbe:    // 3/4 FRACTION
 685                         if (isEncoding(bparams, font, "latin1")
 686                             || isEncoding(bparams, font, "latin5")
 687                             || isEncoding(bparams, font, "utf8")) {
 688                                 os.put(c);
 689                                 break;
 690                         } else {
 691                                 switch (c) {
 692                                 case 0xa4:
 693                                         os << "\\textcurrency{}";
 694                                         column += 15;
 695                                         break;
 696                                 case 0xa6:
 697                                         os << "\\textbrokenbar{}";
 698                                         column += 16;
 699                                         break;
 700                                 case 0xa8:
 701                                         os << "\\textasciidieresis{}";
 702                                         column += 20;
 703                                         break;
 704                                 case 0xb4:
 705                                         os << "\\textasciiacute{}";
 706                                         column += 17;
 707                                         break;
 708                                 case 0xb8: // from latin1.def:
 709                                         os << "\\c\\ ";
 710                                         column += 3;
 711                                         break;
 712                                 case 0xbd:
 713                                         os << "\\textonehalf{}";
 714                                         column += 14;
 715                                         break;
 716                                 case 0xbc:
 717                                         os << "\\textonequarter{}";
 718                                         column += 17;
 719                                         break;
 720                                 case 0xbe:
 721                                         os << "\\textthreequarters{}";
 722                                         column += 20;
 723                                         break;
 724                                 }
 725                                 break;
 726                         }
 727
 728                 case '$': case '&':
 729                 case '%': case '#': case '{':
 730                 case '}': case '_':
 731                         os << '\\';
 732                         os.put(c);
 733                         column += 1;
 734                         break;
 735
 736                 case '~':
 737                         os << "\\textasciitilde{}";
 738                         column += 16;
 739                         break;
 740
 741                 case '^':
 742                         os << "\\textasciicircum{}";
 743                         column += 17;
 744                         break;
 745
 746                 case '*': case '[':
 747                         // avoid being mistaken for optional arguments
 748                         os << '{';
 749                         os.put(c);
 750                         os << '}';
 751                         column += 2;
 752                         break;
 753
 754                 case ' ':
 755                         // Blanks are printed before font switching.
 756                         // Sure? I am not! (try nice-latex)
 757                         // I am sure it's correct. LyX might be smarter
 758                         // in the future, but for now, nothing wrong is
 759                         // written. (Asger)
 760                         break;
 761
 762                 default:
 763
 764                         // I assume this is hack treating typewriter as verbatim
 765                         if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
 766                                 if (c != '\0') {
 767                                         os.put(c);
 768                                 }
 769                                 break;
 770                         }
 771
 772                         // LyX, LaTeX etc.
 773
 774                         // FIXME: if we have "LaTeX" with a font
 775                         // change in the middle (before the 'T', then
 776                         // the "TeX" part is still special cased.
 777                         // Really we should only operate this on
 778                         // "words" for some definition of word
 779
 780                         size_t pnr = 0;
 781
 782                         for (; pnr < phrases_nr; ++pnr) {
 783                                 if (isTextAt(special_phrases[pnr].phrase, i)) {
 784                                         os << special_phrases[pnr].macro;
 785                                         i += special_phrases[pnr].phrase.length() - 1;
 786                                         column += special_phrases[pnr].macro.length() - 1;
 787                                         break;
 788                                 }
 789                         }
 790
 791                         if (pnr == phrases_nr && c != '\0') {
 792                                 os.put(c);
 793                         }
 794                         break;
 795                 }
 796         }
 797 }
 798
 799
 800 void Paragraph::Pimpl::validate(LaTeXFeatures & features,
 801                                 LyXLayout const & layout) const
 802 {
 803         BufferParams const & bparams = features.bufferParams();
 804
 805         // check the params.
 806         if (!params.spacing().isDefault())
 807                 features.require("setspace");
 808
 809         // then the layouts
 810         features.useLayout(layout.name());
 811
 812         // then the fonts
 813         Language const * doc_language = bparams.language;
 814
 815         FontList::const_iterator fcit = fontlist.begin();
 816         FontList::const_iterator fend = fontlist.end();
 817         for (; fcit != fend; ++fcit) {
 818                 if (fcit->font().noun() == LyXFont::ON) {
 819                         lyxerr[Debug::LATEX] << "font.noun: "
 820                                              << fcit->font().noun()
 821                                              << endl;
 822                         features.require("noun");
 823                         lyxerr[Debug::LATEX] << "Noun enabled. Font: "
 824                                              << fcit->font().stateText(0)
 825                                              << endl;
 826                 }
 827                 switch (fcit->font().color()) {
 828                 case LColor::none:
 829                 case LColor::inherit:
 830                 case LColor::ignore:
 831                         // probably we should put here all interface colors used for
 832                         // font displaying! For now I just add this ones I know of (Jug)
 833                 case LColor::latex:
 834                 case LColor::note:
 835                         break;
 836                 default:
 837                         features.require("color");
 838                         lyxerr[Debug::LATEX] << "Color enabled. Font: "
 839                                              << fcit->font().stateText(0)
 840                                              << endl;
 841                 }
 842
 843                 Language const * language = fcit->font().language();
 844                 if (language->babel() != doc_language->babel() &&
 845                     language != ignore_language &&
 846                     language != latex_language)
 847                 {
 848                         features.useLanguage(language);
 849                         lyxerr[Debug::LATEX] << "Found language "
 850                                              << language->babel() << endl;
 851                 }
 852         }
 853
 854         if (!params.leftIndent().zero())
 855                 features.require("ParagraphLeftIndent");
 856
 857         // then the insets
 858         InsetList::const_iterator icit = owner_->insetlist.begin();
 859         InsetList::const_iterator iend = owner_->insetlist.end();
 860         for (; icit != iend; ++icit) {
 861                 if (icit->inset) {
 862                         icit->inset->validate(features);
 863                         if (layout.needprotect &&
 864                             icit->inset->lyxCode() == InsetBase::FOOT_CODE)
 865                                 features.require("NeedLyXFootnoteCode");
 866                 }
 867         }
 868
 869         // then the contents
 870         for (pos_type i = 0; i < size() ; ++i) {
 871                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 872                         if (!special_phrases[pnr].builtin
 873                             && isTextAt(special_phrases[pnr].phrase, i)) {
 874                                 features.require(special_phrases[pnr].phrase);
 875                                 break;
 876                         }
 877                 }
 878                 // these glyphs require the textcomp package
 879                 if (getChar(i) == 0x20ac || getChar(i) == 0xa4
 880                     || getChar(i) == 0xa6 || getChar(i) == 0xa8
 881                     || getChar(i) == 0xb4 || getChar(i) == 0xbd
 882                     || getChar(i) == 0xbc || getChar(i) == 0xbe)
 883                         features.require("textcomp");
 884         }
 885 }
 886
 887
 888 } // namespace lyx