src/Paragraph.cpp

   1 /**
   2  * \file Paragraph.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Jean-Marc Lasgouttes
   9  * \author Angus Leeming
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Dekel Tsur
  13  * \author Jürgen Vigna
  14  *
  15  * Full author contact details are available in file CREDITS.
  16  */
  17
  18 #include <config.h>
  19
  20 #include "Paragraph.h"
  21
  22 #include "Buffer.h"
  23 #include "BufferParams.h"
  24 #include "Changes.h"
  25 #include "Counters.h"
  26 #include "Encoding.h"
  27 #include "debug.h"
  28 #include "gettext.h"
  29 #include "InsetList.h"
  30 #include "Language.h"
  31 #include "LaTeXFeatures.h"
  32 #include "Color.h"
  33 #include "Layout.h"
  34 #include "Length.h"
  35 #include "Font.h"
  36 #include "FontList.h"
  37 #include "LyXRC.h"
  38 #include "Messages.h"
  39 #include "OutputParams.h"
  40 #include "output_latex.h"
  41 #include "paragraph_funcs.h"
  42 #include "ParagraphParameters.h"
  43 #include "sgml.h"
  44 #include "TexRow.h"
  45 #include "VSpace.h"
  46
  47 #include "frontends/alert.h"
  48 #include "frontends/FontMetrics.h"
  49
  50 #include "insets/InsetBibitem.h"
  51 #include "insets/InsetOptArg.h"
  52
  53 #include "support/lstrings.h"
  54 #include "support/textutils.h"
  55 #include "support/convert.h"
  56 #include "support/unicode.h"
  57
  58 #include <sstream>
  59
  60 using std::endl;
  61 using std::string;
  62 using std::ostream;
  63
  64 namespace lyx {
  65
  66 using support::contains;
  67 using support::prefixIs;
  68 using support::suffixIs;
  69 using support::rsplit;
  70 using support::rtrim;
  71
  72
  73 /////////////////////////////////////////////////////////////////////
  74 //
  75 // Paragraph::Private
  76 //
  77 /////////////////////////////////////////////////////////////////////
  78
  79 class Paragraph::Private
  80 {
  81 public:
  82         ///
  83         Private(Paragraph * owner);
  84         /// "Copy constructor"
  85         Private(Private const &, Paragraph * owner);
  86
  87         ///
  88         value_type getChar(pos_type pos) const;
  89         ///
  90         void insertChar(pos_type pos, value_type c, Change const & change);
  91
  92         /// Output the surrogate pair formed by \p c and \p next to \p os.
  93         /// \return the number of characters written.
  94         int latexSurrogatePair(odocstream & os, value_type c, value_type next,
  95                                Encoding const &);
  96
  97         /// Output a space in appropriate formatting (or a surrogate pair
  98         /// if the next character is a combining character).
  99         /// \return whether a surrogate pair was output.
 100         bool simpleTeXBlanks(Encoding const &,
 101                              odocstream &, TexRow & texrow,
 102                              pos_type i,
 103                              unsigned int & column,
 104                              Font const & font,
 105                              Layout const & style);
 106
 107         /// Output consecutive known unicode chars, belonging to the same
 108         /// language as specified by \p preamble, to \p os starting from \p c.
 109         /// \return the number of characters written.
 110         int knownLangChars(odocstream & os, value_type c, string & preamble,
 111                            Change &, Encoding const &, pos_type &);
 112
 113         /// This could go to ParagraphParameters if we want to.
 114         int startTeXParParams(BufferParams const &, odocstream &, TexRow &,
 115                               bool) const;
 116
 117         /// This could go to ParagraphParameters if we want to.
 118         int endTeXParParams(BufferParams const &, odocstream &, TexRow &,
 119                             bool) const;
 120
 121         ///
 122         void latexInset(Buffer const &, BufferParams const &,
 123                                    odocstream &,
 124                                    TexRow & texrow, OutputParams &,
 125                                    Font & running_font,
 126                                    Font & basefont,
 127                                    Font const & outerfont,
 128                                    bool & open_font,
 129                                    Change & running_change,
 130                                    Layout const & style,
 131                                    pos_type & i,
 132                                    unsigned int & column);
 133
 134         ///
 135         void latexSpecialChar(
 136                                    odocstream & os,
 137                                    OutputParams & runparams,
 138                                    Font & running_font,
 139                                    Change & running_change,
 140                                    Layout const & style,
 141                                    pos_type & i,
 142                                    unsigned int & column);
 143
 144         ///
 145         bool latexSpecialT1(
 146                 char_type const c,
 147                 odocstream & os,
 148                 pos_type & i,
 149                 unsigned int & column);
 150         ///
 151         bool latexSpecialTypewriter(
 152                 char_type const c,
 153                 odocstream & os,
 154                 pos_type & i,
 155                 unsigned int & column);
 156         ///
 157         bool latexSpecialPhrase(
 158                 odocstream & os,
 159                 pos_type & i,
 160                 unsigned int & column);
 161
 162         ///
 163         void validate(LaTeXFeatures & features,
 164                       Layout const & layout) const;
 165
 166         ///
 167         pos_type size() const { return owner_->size(); }
 168
 169         /// match a string against a particular point in the paragraph
 170         bool isTextAt(std::string const & str, pos_type pos) const;
 171
 172         /// Which Paragraph owns us?
 173         Paragraph * owner_;
 174
 175         /// In which Inset?
 176         Inset * inset_owner_;
 177
 178         ///
 179         FontList fontlist_;
 180
 181         ///
 182         unsigned int id_;
 183         ///
 184         static unsigned int paragraph_id;
 185         ///
 186         ParagraphParameters params_;
 187
 188         /// for recording and looking up changes
 189         Changes changes_;
 190
 191         ///
 192         InsetList insetlist_;
 193
 194         ///
 195         LayoutPtr layout_;
 196
 197         /// end of label
 198         pos_type begin_of_body_;
 199 };
 200
 201
 202
 203
 204 using std::endl;
 205 using std::upper_bound;
 206 using std::lower_bound;
 207 using std::string;
 208
 209
 210 // Initialization of the counter for the paragraph id's,
 211 unsigned int Paragraph::Private::paragraph_id = 0;
 212
 213 namespace {
 214
 215 struct special_phrase {
 216         string phrase;
 217         docstring macro;
 218         bool builtin;
 219 };
 220
 221 special_phrase const special_phrases[] = {
 222         { "LyX", from_ascii("\\protect\\LyX{}"), false },
 223         { "TeX", from_ascii("\\protect\\TeX{}"), true },
 224         { "LaTeX2e", from_ascii("\\protect\\LaTeXe{}"), true },
 225         { "LaTeX", from_ascii("\\protect\\LaTeX{}"), true },
 226 };
 227
 228 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
 229
 230 } // namespace anon
 231
 232
 233 Paragraph::Private::Private(Paragraph * owner)
 234         : owner_(owner), inset_owner_(0), begin_of_body_(0)
 235 {
 236         id_ = paragraph_id++;
 237 }
 238
 239
 240 Paragraph::Private::Private(Private const & p, Paragraph * owner)
 241         : owner_(owner), inset_owner_(p.inset_owner_), fontlist_(p.fontlist_),
 242           params_(p.params_), changes_(p.changes_), insetlist_(p.insetlist_),
 243           layout_(p.layout_), begin_of_body_(p.begin_of_body_)
 244 {
 245         id_ = paragraph_id++;
 246 }
 247
 248
 249 bool Paragraph::isChanged(pos_type start, pos_type end) const
 250 {
 251         BOOST_ASSERT(start >= 0 && start <= size());
 252         BOOST_ASSERT(end > start && end <= size() + 1);
 253
 254         return d->changes_.isChanged(start, end);
 255 }
 256
 257
 258 bool Paragraph::isMergedOnEndOfParDeletion(bool trackChanges) const {
 259         // keep the logic here in sync with the logic of eraseChars()
 260
 261         if (!trackChanges) {
 262                 return true;
 263         }
 264
 265         Change change = d->changes_.lookup(size());
 266
 267         return change.type == Change::INSERTED && change.author == 0;
 268 }
 269
 270
 271 void Paragraph::setChange(Change const & change)
 272 {
 273         // beware of the imaginary end-of-par character!
 274         d->changes_.set(change, 0, size() + 1);
 275
 276         /*
 277          * Propagate the change recursively - but not in case of DELETED!
 278          *
 279          * Imagine that your co-author makes changes in an existing inset. He
 280          * sends your document to you and you come to the conclusion that the
 281          * inset should go completely. If you erase it, LyX must not delete all
 282          * text within the inset. Otherwise, the change tracked insertions of
 283          * your co-author get lost and there is no way to restore them later.
 284          *
 285          * Conclusion: An inset's content should remain untouched if you delete it
 286          */
 287
 288         if (change.type != Change::DELETED) {
 289                 for (pos_type pos = 0; pos < size(); ++pos) {
 290                         if (isInset(pos))
 291                                 getInset(pos)->setChange(change);
 292                 }
 293         }
 294 }
 295
 296
 297 void Paragraph::setChange(pos_type pos, Change const & change)
 298 {
 299         BOOST_ASSERT(pos >= 0 && pos <= size());
 300
 301         d->changes_.set(change, pos);
 302
 303         // see comment in setChange(Change const &) above
 304
 305         if (change.type != Change::DELETED &&
 306             pos < size() && isInset(pos)) {
 307                 getInset(pos)->setChange(change);
 308         }
 309 }
 310
 311
 312 Change const & Paragraph::lookupChange(pos_type pos) const
 313 {
 314         BOOST_ASSERT(pos >= 0 && pos <= size());
 315
 316         return d->changes_.lookup(pos);
 317 }
 318
 319
 320 void Paragraph::acceptChanges(BufferParams const & bparams, pos_type start,
 321                 pos_type end)
 322 {
 323         BOOST_ASSERT(start >= 0 && start <= size());
 324         BOOST_ASSERT(end > start && end <= size() + 1);
 325
 326         for (pos_type pos = start; pos < end; ++pos) {
 327                 switch (lookupChange(pos).type) {
 328                         case Change::UNCHANGED:
 329                                 // accept changes in nested inset
 330                                 if (pos < size() && isInset(pos))
 331                                         getInset(pos)->acceptChanges(bparams);
 332
 333                                 break;
 334
 335                         case Change::INSERTED:
 336                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 337                                 // also accept changes in nested inset
 338                                 if (pos < size() && isInset(pos)) {
 339                                         getInset(pos)->acceptChanges(bparams);
 340                                 }
 341                                 break;
 342
 343                         case Change::DELETED:
 344                                 // Suppress access to non-existent
 345                                 // "end-of-paragraph char"
 346                                 if (pos < size()) {
 347                                         eraseChar(pos, false);
 348                                         --end;
 349                                         --pos;
 350                                 }
 351                                 break;
 352                 }
 353
 354         }
 355 }
 356
 357
 358 void Paragraph::rejectChanges(BufferParams const & bparams,
 359                 pos_type start, pos_type end)
 360 {
 361         BOOST_ASSERT(start >= 0 && start <= size());
 362         BOOST_ASSERT(end > start && end <= size() + 1);
 363
 364         for (pos_type pos = start; pos < end; ++pos) {
 365                 switch (lookupChange(pos).type) {
 366                         case Change::UNCHANGED:
 367                                 // reject changes in nested inset
 368                                 if (pos < size() && isInset(pos)) {
 369                                         getInset(pos)->rejectChanges(bparams);
 370                                 }
 371                                 break;
 372
 373                         case Change::INSERTED:
 374                                 // Suppress access to non-existent
 375                                 // "end-of-paragraph char"
 376                                 if (pos < size()) {
 377                                         eraseChar(pos, false);
 378                                         --end;
 379                                         --pos;
 380                                 }
 381                                 break;
 382
 383                         case Change::DELETED:
 384                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 385
 386                                 // Do NOT reject changes within a deleted inset!
 387                                 // There may be insertions of a co-author inside of it!
 388
 389                                 break;
 390                 }
 391         }
 392 }
 393
 394
 395 Paragraph::value_type Paragraph::Private::getChar(pos_type pos) const
 396 {
 397         BOOST_ASSERT(pos >= 0 && pos <= size());
 398
 399         return owner_->getChar(pos);
 400 }
 401
 402
 403 void Paragraph::Private::insertChar(pos_type pos, value_type c,
 404                 Change const & change)
 405 {
 406         BOOST_ASSERT(pos >= 0 && pos <= size());
 407
 408         // track change
 409         changes_.insert(change, pos);
 410
 411         // This is actually very common when parsing buffers (and
 412         // maybe inserting ascii text)
 413         if (pos == size()) {
 414                 // when appending characters, no need to update tables
 415                 owner_->text_.push_back(c);
 416                 return;
 417         }
 418
 419         owner_->text_.insert(owner_->text_.begin() + pos, c);
 420
 421         // Update the font table.
 422         fontlist_.increasePosAfterPos(pos);
 423
 424         // Update the insets
 425         insetlist_.increasePosAfterPos(pos);
 426 }
 427
 428
 429 void Paragraph::insertInset(pos_type pos, Inset * inset,
 430                                    Change const & change)
 431 {
 432         BOOST_ASSERT(inset);
 433         BOOST_ASSERT(pos >= 0 && pos <= size());
 434
 435         d->insertChar(pos, META_INSET, change);
 436         BOOST_ASSERT(text_[pos] == META_INSET);
 437
 438         // Add a new entry in the insetlist_.
 439         d->insetlist_.insert(inset, pos);
 440 }
 441
 442
 443 bool Paragraph::eraseChar(pos_type pos, bool trackChanges)
 444 {
 445         BOOST_ASSERT(pos >= 0 && pos <= size());
 446
 447         // keep the logic here in sync with the logic of isMergedOnEndOfParDeletion()
 448
 449         if (trackChanges) {
 450                 Change change = d->changes_.lookup(pos);
 451
 452                 // set the character to DELETED if
 453                 //  a) it was previously unchanged or
 454                 //  b) it was inserted by a co-author
 455
 456                 if (change.type == Change::UNCHANGED ||
 457                     (change.type == Change::INSERTED && change.author != 0)) {
 458                         setChange(pos, Change(Change::DELETED));
 459                         return false;
 460                 }
 461
 462                 if (change.type == Change::DELETED)
 463                         return false;
 464         }
 465
 466         // Don't physically access the imaginary end-of-paragraph character.
 467         // eraseChar() can only mark it as DELETED. A physical deletion of
 468         // end-of-par must be handled externally.
 469         if (pos == size()) {
 470                 return false;
 471         }
 472
 473         // track change
 474         d->changes_.erase(pos);
 475
 476         // if it is an inset, delete the inset entry
 477         if (text_[pos] == Paragraph::META_INSET)
 478                 d->insetlist_.erase(pos);
 479
 480         text_.erase(text_.begin() + pos);
 481
 482         // Update the fontlist_
 483         d->fontlist_.erase(pos);
 484
 485         // Update the insetlist_
 486         d->insetlist_.decreasePosAfterPos(pos);
 487
 488         return true;
 489 }
 490
 491
 492 int Paragraph::eraseChars(pos_type start, pos_type end, bool trackChanges)
 493 {
 494         BOOST_ASSERT(start >= 0 && start <= size());
 495         BOOST_ASSERT(end >= start && end <= size() + 1);
 496
 497         pos_type i = start;
 498         for (pos_type count = end - start; count; --count) {
 499                 if (!eraseChar(i, trackChanges))
 500                         ++i;
 501         }
 502         return end - i;
 503 }
 504
 505
 506 int Paragraph::Private::latexSurrogatePair(odocstream & os, value_type c,
 507                 value_type next, Encoding const & encoding)
 508 {
 509         // Writing next here may circumvent a possible font change between
 510         // c and next. Since next is only output if it forms a surrogate pair
 511         // with c we can ignore this:
 512         // A font change inside a surrogate pair does not make sense and is
 513         // hopefully impossible to input.
 514         // FIXME: change tracking
 515         // Is this correct WRT change tracking?
 516         docstring const latex1 = encoding.latexChar(next);
 517         docstring const latex2 = encoding.latexChar(c);
 518         os << latex1 << '{' << latex2 << '}';
 519         return latex1.length() + latex2.length() + 2;
 520 }
 521
 522
 523 bool Paragraph::Private::simpleTeXBlanks(Encoding const & encoding,
 524                                        odocstream & os, TexRow & texrow,
 525                                        pos_type i,
 526                                        unsigned int & column,
 527                                        Font const & font,
 528                                        Layout const & style)
 529 {
 530         if (style.pass_thru)
 531                 return false;
 532
 533         if (i + 1 < size()) {
 534                 char_type next = getChar(i + 1);
 535                 if (Encodings::isCombiningChar(next)) {
 536                         // This space has an accent, so we must always output it.
 537                         column += latexSurrogatePair(os, ' ', next, encoding) - 1;
 538                         return true;
 539                 }
 540         }
 541
 542         if (lyxrc.plaintext_linelen > 0
 543             && column > lyxrc.plaintext_linelen
 544             && i
 545             && getChar(i - 1) != ' '
 546             && (i + 1 < size())
 547             // same in FreeSpacing mode
 548             && !owner_->isFreeSpacing()
 549             // In typewriter mode, we want to avoid
 550             // ! . ? : at the end of a line
 551             && !(font.family() == Font::TYPEWRITER_FAMILY
 552                  && (getChar(i - 1) == '.'
 553                      || getChar(i - 1) == '?'
 554                      || getChar(i - 1) == ':'
 555                      || getChar(i - 1) == '!'))) {
 556                 os << '\n';
 557                 texrow.newline();
 558                 texrow.start(owner_->id(), i + 1);
 559                 column = 0;
 560         } else if (style.free_spacing) {
 561                 os << '~';
 562         } else {
 563                 os << ' ';
 564         }
 565         return false;
 566 }
 567
 568
 569 int Paragraph::Private::knownLangChars(odocstream & os,
 570                                      value_type c,
 571                                      string & preamble,
 572                                      Change & runningChange,
 573                                      Encoding const & encoding,
 574                                      pos_type & i)
 575 {
 576         // When the character is marked by the proper language, we simply
 577         // get its code point in some encoding, otherwise we get the
 578         // translation specified in the unicodesymbols file, which is
 579         // something like "\textLANG{<spec>}". So, we have to retain
 580         // "\textLANG{<spec>" for the first char but only "<spec>" for
 581         // all subsequent chars.
 582         docstring const latex1 = rtrim(encoding.latexChar(c), "}");
 583         int length = latex1.length();
 584         os << latex1;
 585         while (i + 1 < size()) {
 586                 char_type next = getChar(i + 1);
 587                 // Stop here if next character belongs to another
 588                 // language or there is a change tracking status.
 589                 if (!Encodings::isKnownLangChar(next, preamble) ||
 590                     runningChange != owner_->lookupChange(i + 1))
 591                         break;
 592                 Font prev_font;
 593                 bool found = false;
 594                 FontList::const_iterator cit = fontlist_.begin();
 595                 FontList::const_iterator end = fontlist_.end();
 596                 for (; cit != end; ++cit) {
 597                         if (cit->pos() >= i && !found) {
 598                                 prev_font = cit->font();
 599                                 found = true;
 600                         }
 601                         if (cit->pos() >= i + 1)
 602                                 break;
 603                 }
 604                 // Stop here if there is a font attribute change.
 605                 if (found && cit != end && prev_font != cit->font())
 606                         break;
 607                 docstring const latex = rtrim(encoding.latexChar(next), "}");
 608                 docstring::size_type const j =
 609                                         latex.find_first_of(from_ascii("{"));
 610                 if (j == docstring::npos) {
 611                         os << latex;
 612                         length += latex.length();
 613                 } else {
 614                         os << latex.substr(j + 1);
 615                         length += latex.substr(j + 1).length();
 616                 }
 617                 ++i;
 618         }
 619         // When the proper language is set, we are simply passed a code
 620         // point, so we should not try to close the \textLANG command.
 621         if (prefixIs(latex1, from_ascii("\\" + preamble))) {
 622                 os << '}';
 623                 ++length;
 624         }
 625         return length;
 626 }
 627
 628
 629 bool Paragraph::Private::isTextAt(string const & str, pos_type pos) const
 630 {
 631         pos_type const len = str.length();
 632
 633         // is the paragraph large enough?
 634         if (pos + len > size())
 635                 return false;
 636
 637         // does the wanted text start at point?
 638         for (string::size_type i = 0; i < str.length(); ++i) {
 639                 // Caution: direct comparison of characters works only
 640                 // because str is pure ASCII.
 641                 if (str[i] != owner_->text_[pos + i])
 642                         return false;
 643         }
 644
 645         return fontlist_.hasChangeInRange(pos, len);
 646 }
 647
 648
 649 void Paragraph::Private::latexInset(Buffer const & buf,
 650                                              BufferParams const & bparams,
 651                                              odocstream & os,
 652                                              TexRow & texrow,
 653                                              OutputParams & runparams,
 654                                              Font & running_font,
 655                                              Font & basefont,
 656                                              Font const & outerfont,
 657                                              bool & open_font,
 658                                              Change & running_change,
 659                                              Layout const & style,
 660                                              pos_type & i,
 661                                              unsigned int & column)
 662 {
 663         Inset * inset = owner_->getInset(i);
 664         BOOST_ASSERT(inset);
 665
 666         if (style.pass_thru) {
 667                 inset->plaintext(buf, os, runparams);
 668                 return;
 669         }
 670
 671         // FIXME: move this to InsetNewline::latex
 672         if (inset->lyxCode() == NEWLINE_CODE) {
 673                 // newlines are handled differently here than
 674                 // the default in simpleTeXSpecialChars().
 675                 if (!style.newline_allowed) {
 676                         os << '\n';
 677                 } else {
 678                         if (open_font) {
 679                                 column += running_font.latexWriteEndChanges(
 680                                         os, bparams, runparams,
 681                                         basefont, basefont);
 682                                 open_font = false;
 683                         }
 684
 685                         if (running_font.family() == Font::TYPEWRITER_FAMILY)
 686                                 os << '~';
 687
 688                         basefont = owner_->getLayoutFont(bparams, outerfont);
 689                         running_font = basefont;
 690
 691                         if (runparams.moving_arg)
 692                                 os << "\\protect ";
 693
 694                         os << "\\\\\n";
 695                 }
 696                 texrow.newline();
 697                 texrow.start(owner_->id(), i + 1);
 698                 column = 0;
 699         }
 700
 701         if (owner_->lookupChange(i).type == Change::DELETED) {
 702                 if( ++runparams.inDeletedInset == 1)
 703                         runparams.changeOfDeletedInset = owner_->lookupChange(i);
 704         }
 705
 706         if (inset->canTrackChanges()) {
 707                 column += Changes::latexMarkChange(os, bparams, running_change,
 708                         Change(Change::UNCHANGED));
 709                 running_change = Change(Change::UNCHANGED);
 710         }
 711
 712         bool close = false;
 713         odocstream::pos_type const len = os.tellp();
 714
 715         if ((inset->lyxCode() == GRAPHICS_CODE
 716              || inset->lyxCode() == MATH_CODE
 717              || inset->lyxCode() == HYPERLINK_CODE)
 718             && running_font.isRightToLeft()) {
 719                 if (running_font.language()->lang() == "farsi")
 720                         os << "\\beginL{}";
 721                 else
 722                         os << "\\L{";
 723                 close = true;
 724         }
 725
 726         // FIXME: Bug: we can have an empty font change here!
 727         // if there has just been a font change, we are going to close it
 728         // right now, which means stupid latex code like \textsf{}. AFAIK,
 729         // this does not harm dvi output. A minor bug, thus (JMarc)
 730
 731         // Some insets cannot be inside a font change command.
 732         // However, even such insets *can* be placed in \L or \R
 733         // or their equivalents (for RTL language switches), so we don't
 734         // close the language in those cases.
 735         // ArabTeX, though, cannot handle this special behavior, it seems.
 736         bool arabtex = basefont.language()->lang() == "arabic_arabtex"
 737                 || running_font.language()->lang() == "arabic_arabtex";
 738         if (open_font && inset->noFontChange()) {
 739                 bool closeLanguage = arabtex
 740                         || basefont.isRightToLeft() == running_font.isRightToLeft();
 741                 unsigned int count = running_font.latexWriteEndChanges(os,
 742                         bparams, runparams, basefont, basefont, closeLanguage);
 743                 column += count;
 744                 // if any font properties were closed, update the running_font,
 745                 // making sure, however, to leave the language as it was
 746                 if (count > 0) {
 747                         // FIXME: probably a better way to keep track of the old
 748                         // language, than copying the entire font?
 749                         Font const copy_font(running_font);
 750                         basefont = owner_->getLayoutFont(bparams, outerfont);
 751                         running_font = basefont;
 752                         if (!closeLanguage)
 753                                 running_font.setLanguage(copy_font.language());
 754                         // leave font open if language is still open
 755                         open_font = (running_font.language() == basefont.language());
 756                         if (closeLanguage)
 757                                 runparams.local_font = &basefont;
 758                 }
 759         }
 760
 761         int tmp = inset->latex(buf, os, runparams);
 762
 763         if (close) {
 764         if (running_font.language()->lang() == "farsi")
 765                         os << "\\endL{}";
 766                 else
 767                         os << '}';
 768         }
 769
 770         if (tmp) {
 771                 for (int j = 0; j < tmp; ++j)
 772                         texrow.newline();
 773
 774                 texrow.start(owner_->id(), i + 1);
 775                 column = 0;
 776         } else {
 777                 column += os.tellp() - len;
 778         }
 779
 780         if (owner_->lookupChange(i).type == Change::DELETED)
 781                 --runparams.inDeletedInset;
 782 }
 783
 784
 785 void Paragraph::Private::latexSpecialChar(
 786                                              odocstream & os,
 787                                              OutputParams & runparams,
 788                                              Font & running_font,
 789                                              Change & running_change,
 790                                              Layout const & style,
 791                                              pos_type & i,
 792                                              unsigned int & column)
 793 {
 794         value_type const c = getChar(i);
 795
 796         if (style.pass_thru) {
 797                 if (c != '\0')
 798                         // FIXME UNICODE: This can fail if c cannot
 799                         // be encoded in the current encoding.
 800                         os.put(c);
 801                 return;
 802         }
 803
 804         if (runparams.verbatim) {
 805                 os.put(c);
 806                 return;
 807         }
 808
 809         if (lyxrc.fontenc == "T1" && latexSpecialT1(c, os, i, column))
 810                 return;
 811
 812         if (running_font.family() == Font::TYPEWRITER_FAMILY
 813                 && latexSpecialTypewriter(c, os, i, column))
 814                 return;
 815
 816         // Otherwise, we use what LaTeX provides us.
 817         switch (c) {
 818         case '\\':
 819                 os << "\\textbackslash{}";
 820                 column += 15;
 821                 break;
 822         case '<':
 823                 os << "\\textless{}";
 824                 column += 10;
 825                 break;
 826         case '>':
 827                 os << "\\textgreater{}";
 828                 column += 13;
 829                 break;
 830         case '|':
 831                 os << "\\textbar{}";
 832                 column += 9;
 833                 break;
 834         case '-':
 835                 os << '-';
 836                 break;
 837         case '\"':
 838                 os << "\\char`\\\"{}";
 839                 column += 9;
 840                 break;
 841
 842         case '$': case '&':
 843         case '%': case '#': case '{':
 844         case '}': case '_':
 845                 os << '\\';
 846                 os.put(c);
 847                 column += 1;
 848                 break;
 849
 850         case '~':
 851                 os << "\\textasciitilde{}";
 852                 column += 16;
 853                 break;
 854
 855         case '^':
 856                 os << "\\textasciicircum{}";
 857                 column += 17;
 858                 break;
 859
 860         case '*': case '[':
 861                 // avoid being mistaken for optional arguments
 862                 os << '{';
 863                 os.put(c);
 864                 os << '}';
 865                 column += 2;
 866                 break;
 867
 868         case ' ':
 869                 // Blanks are printed before font switching.
 870                 // Sure? I am not! (try nice-latex)
 871                 // I am sure it's correct. LyX might be smarter
 872                 // in the future, but for now, nothing wrong is
 873                 // written. (Asger)
 874                 break;
 875
 876         default:
 877
 878                 // LyX, LaTeX etc.
 879                 if (latexSpecialPhrase(os, i, column))
 880                         return;
 881
 882                 if (c == '\0')
 883                         return;
 884
 885                 Encoding const & encoding = *(runparams.encoding);
 886                 if (i + 1 < size()) {
 887                         char_type next = getChar(i + 1);
 888                         if (Encodings::isCombiningChar(next)) {
 889                                 column += latexSurrogatePair(os, c, next, encoding) - 1;
 890                                 ++i;
 891                                 break;
 892                         }
 893                 }
 894                 string preamble;
 895                 if (Encodings::isKnownLangChar(c, preamble)) {
 896                         column += knownLangChars(os, c, preamble, running_change,
 897                                 encoding, i) - 1;
 898                         break;
 899                 }
 900                 docstring const latex = encoding.latexChar(c);
 901                 if (latex.length() > 1 && latex[latex.length() - 1] != '}') {
 902                         // Prevent eating of a following
 903                         // space or command corruption by
 904                         // following characters
 905                         column += latex.length() + 1;
 906                         os << latex << "{}";
 907                 } else {
 908                         column += latex.length() - 1;
 909                         os << latex;
 910                 }
 911                 break;
 912         }
 913 }
 914
 915
 916 bool Paragraph::Private::latexSpecialT1(char_type const c, odocstream & os,
 917         pos_type & i, unsigned int & column)
 918 {
 919         switch (c) {
 920         case '>':
 921         case '<':
 922                 os.put(c);
 923                 // In T1 encoding, these characters exist
 924                 // but we should avoid ligatures
 925                 if (i + 1 > size() || getChar(i + 1) != c)
 926                         return true;
 927                 os << "\\,{}";
 928                 column += 3;
 929                 // Alternative code:
 930                 //os << "\\textcompwordmark{}";
 931                 //column += 19;
 932                 return true;
 933         case '|':
 934                 os.put(c);
 935                 return true;
 936         default:
 937                 return false;
 938         }
 939 }
 940
 941
 942 bool Paragraph::Private::latexSpecialTypewriter(char_type const c, odocstream & os,
 943         pos_type & i, unsigned int & column)
 944 {
 945         switch (c) {
 946         case '-':
 947                 if (i + 1 < size() && getChar(i + 1) == '-') {
 948                         // "--" in Typewriter mode -> "-{}-"
 949                         os << "-{}";
 950                         column += 2;
 951                 } else
 952                         os << '-';
 953                 return true;
 954
 955         // I assume this is hack treating typewriter as verbatim
 956         // FIXME UNICODE: This can fail if c cannot be encoded
 957         // in the current encoding.
 958
 959         case '\0':
 960                 return true;
 961
 962         // Those characters are not directly supported.
 963         case '\\':
 964         case '\"':
 965         case '$': case '&':
 966         case '%': case '#': case '{':
 967         case '}': case '_':
 968         case '~':
 969         case '^':
 970         case '*': case '[':
 971         case ' ':
 972                 return false;
 973
 974         default:
 975                 // With Typewriter font, these characters exist.
 976                 os.put(c);
 977                 return true;
 978         }
 979 }
 980
 981
 982 bool Paragraph::Private::latexSpecialPhrase(odocstream & os, pos_type & i,
 983         unsigned int & column)
 984 {
 985         // FIXME: if we have "LaTeX" with a font
 986         // change in the middle (before the 'T', then
 987         // the "TeX" part is still special cased.
 988         // Really we should only operate this on
 989         // "words" for some definition of word
 990
 991         for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 992                 if (!isTextAt(special_phrases[pnr].phrase, i))
 993                         continue;
 994                 os << special_phrases[pnr].macro;
 995                 i += special_phrases[pnr].phrase.length() - 1;
 996                 column += special_phrases[pnr].macro.length() - 1;
 997                 return true;
 998         }
 999         return false;
1000 }
1001
1002
1003 void Paragraph::Private::validate(LaTeXFeatures & features,
1004                                 Layout const & layout) const
1005 {
1006         // check the params.
1007         if (!params_.spacing().isDefault())
1008                 features.require("setspace");
1009
1010         // then the layouts
1011         features.useLayout(layout.name());
1012
1013         // then the fonts
1014         fontlist_.validate(features);
1015
1016         // then the indentation
1017         if (!params_.leftIndent().zero())
1018                 features.require("ParagraphLeftIndent");
1019
1020         // then the insets
1021         InsetList::const_iterator icit = insetlist_.begin();
1022         InsetList::const_iterator iend = insetlist_.end();
1023         for (; icit != iend; ++icit) {
1024                 if (icit->inset) {
1025                         icit->inset->validate(features);
1026                         if (layout.needprotect &&
1027                             icit->inset->lyxCode() == FOOT_CODE)
1028                                 features.require("NeedLyXFootnoteCode");
1029                 }
1030         }
1031
1032         // then the contents
1033         for (pos_type i = 0; i < size() ; ++i) {
1034                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
1035                         if (!special_phrases[pnr].builtin
1036                             && isTextAt(special_phrases[pnr].phrase, i)) {
1037                                 features.require(special_phrases[pnr].phrase);
1038                                 break;
1039                         }
1040                 }
1041                 Encodings::validate(getChar(i), features);
1042         }
1043 }
1044
1045 /////////////////////////////////////////////////////////////////////
1046 //
1047 // Paragraph
1048 //
1049 /////////////////////////////////////////////////////////////////////
1050
1051 Paragraph::Paragraph()
1052         : d(new Paragraph::Private(this))
1053 {
1054         itemdepth = 0;
1055         d->params_.clear();
1056         text_.reserve(100);
1057 }
1058
1059
1060 Paragraph::Paragraph(Paragraph const & par)
1061         : itemdepth(par.itemdepth),     text_(par.text_),
1062         d(new Paragraph::Private(*par.d, this))
1063 {
1064 }
1065
1066
1067 Paragraph & Paragraph::operator=(Paragraph const & par)
1068 {
1069         // needed as we will destroy the private part before copying it
1070         if (&par != this) {
1071                 itemdepth = par.itemdepth;
1072                 text_ = par.text_;
1073
1074                 delete d;
1075                 d = new Private(*par.d, this);
1076         }
1077         return *this;
1078 }
1079
1080
1081 Paragraph::~Paragraph()
1082 {
1083         delete d;
1084 }
1085
1086
1087 void Paragraph::write(Buffer const & buf, ostream & os,
1088                           BufferParams const & bparams,
1089                           depth_type & dth) const
1090 {
1091         // The beginning or end of a deeper (i.e. nested) area?
1092         if (dth != params().depth()) {
1093                 if (params().depth() > dth) {
1094                         while (params().depth() > dth) {
1095                                 os << "\n\\begin_deeper";
1096                                 ++dth;
1097                         }
1098                 } else {
1099                         while (params().depth() < dth) {
1100                                 os << "\n\\end_deeper";
1101                                 --dth;
1102                         }
1103                 }
1104         }
1105
1106         // First write the layout
1107         os << "\n\\begin_layout " << to_utf8(layout()->name()) << '\n';
1108
1109         params().write(os);
1110
1111         Font font1(Font::ALL_INHERIT, bparams.language);
1112
1113         Change running_change = Change(Change::UNCHANGED);
1114
1115         int column = 0;
1116         for (pos_type i = 0; i <= size(); ++i) {
1117
1118                 Change change = lookupChange(i);
1119                 Changes::lyxMarkChange(os, column, running_change, change);
1120                 running_change = change;
1121
1122                 if (i == size())
1123                         break;
1124
1125                 // Write font changes
1126                 Font font2 = getFontSettings(bparams, i);
1127                 if (font2 != font1) {
1128                         font2.lyxWriteChanges(font1, os);
1129                         column = 0;
1130                         font1 = font2;
1131                 }
1132
1133                 value_type const c = getChar(i);
1134                 switch (c) {
1135                 case META_INSET:
1136                 {
1137                         Inset const * inset = getInset(i);
1138                         if (inset)
1139                                 if (inset->directWrite()) {
1140                                         // international char, let it write
1141                                         // code directly so it's shorter in
1142                                         // the file
1143                                         inset->write(buf, os);
1144                                 } else {
1145                                         if (i)
1146                                                 os << '\n';
1147                                         os << "\\begin_inset ";
1148                                         inset->write(buf, os);
1149                                         os << "\n\\end_inset\n\n";
1150                                         column = 0;
1151                                 }
1152                 }
1153                 break;
1154                 case '\\':
1155                         os << "\n\\backslash\n";
1156                         column = 0;
1157                         break;
1158                 case '.':
1159                         if (i + 1 < size() && getChar(i + 1) == ' ') {
1160                                 os << ".\n";
1161                                 column = 0;
1162                         } else
1163                                 os << '.';
1164                         break;
1165                 default:
1166                         if ((column > 70 && c == ' ')
1167                             || column > 79) {
1168                                 os << '\n';
1169                                 column = 0;
1170                         }
1171                         // this check is to amend a bug. LyX sometimes
1172                         // inserts '\0' this could cause problems.
1173                         if (c != '\0') {
1174                                 std::vector<char> tmp = ucs4_to_utf8(c);
1175                                 tmp.push_back('\0');
1176                                 os << &tmp[0];
1177                         } else
1178                                 lyxerr << "ERROR (Paragraph::writeFile):"
1179                                         " NULL char in structure." << endl;
1180                         ++column;
1181                         break;
1182                 }
1183         }
1184
1185         os << "\n\\end_layout\n";
1186 }
1187
1188
1189 void Paragraph::validate(LaTeXFeatures & features) const
1190 {
1191         d->validate(features, *layout());
1192 }
1193
1194
1195 void Paragraph::insert(pos_type start, docstring const & str,
1196                        Font const & font, Change const & change)
1197 {
1198         for (size_t i = 0, n = str.size(); i != n ; ++i)
1199                 insertChar(start + i, str[i], font, change);
1200 }
1201
1202
1203 void Paragraph::appendChar(value_type c, Font const & font,
1204                 Change const & change)
1205 {
1206         // track change
1207         d->changes_.insert(change, text_.size());
1208         // when appending characters, no need to update tables
1209         text_.push_back(c);
1210         setFont(text_.size() - 1, font);
1211 }
1212
1213
1214 void Paragraph::appendString(docstring const & s, Font const & font,
1215                 Change const & change)
1216 {
1217         size_t end = s.size();
1218         size_t oldsize = text_.size();
1219         size_t newsize = oldsize + end;
1220         size_t capacity = text_.capacity();
1221         if (newsize >= capacity)
1222                 text_.reserve(std::max(capacity + 100, newsize));
1223
1224         // FIXME: Optimize this!
1225         for (pos_type i = 0; i != end; ++i) {
1226                 // track change
1227                 d->changes_.insert(change, i);
1228                 // when appending characters, no need to update tables
1229                 text_.push_back(s[i]);
1230         }
1231         d->fontlist_.setRange(oldsize, newsize, font);
1232 }
1233
1234
1235 void Paragraph::insertChar(pos_type pos, Paragraph::value_type c,
1236                            bool trackChanges)
1237 {
1238         d->insertChar(pos, c, Change(trackChanges ?
1239                            Change::INSERTED : Change::UNCHANGED));
1240 }
1241
1242
1243 void Paragraph::insertChar(pos_type pos, Paragraph::value_type c,
1244                            Font const & font, bool trackChanges)
1245 {
1246         d->insertChar(pos, c, Change(trackChanges ?
1247                            Change::INSERTED : Change::UNCHANGED));
1248         setFont(pos, font);
1249 }
1250
1251
1252 void Paragraph::insertChar(pos_type pos, Paragraph::value_type c,
1253                            Font const & font, Change const & change)
1254 {
1255         d->insertChar(pos, c, change);
1256         setFont(pos, font);
1257 }
1258
1259
1260 void Paragraph::insertInset(pos_type pos, Inset * inset,
1261                             Font const & font, Change const & change)
1262 {
1263         insertInset(pos, inset, change);
1264         // Set the font/language of the inset...
1265         setFont(pos, font);
1266 }
1267
1268
1269 bool Paragraph::insetAllowed(InsetCode code)
1270 {
1271         return !d->inset_owner_ || d->inset_owner_->insetAllowed(code);
1272 }
1273
1274
1275 // Gets uninstantiated font setting at position.
1276 Font const Paragraph::getFontSettings(BufferParams const & bparams,
1277                                          pos_type pos) const
1278 {
1279         if (pos > size()) {
1280                 lyxerr << " pos: " << pos << " size: " << size() << endl;
1281                 BOOST_ASSERT(pos <= size());
1282         }
1283
1284         FontList::const_iterator cit = d->fontlist_.fontIterator(pos);
1285         if (cit != d->fontlist_.end())
1286                 return cit->font();
1287
1288         if (pos == size() && !empty())
1289                 return getFontSettings(bparams, pos - 1);
1290
1291         return Font(Font::ALL_INHERIT, getParLanguage(bparams));
1292 }
1293
1294
1295 FontSpan Paragraph::fontSpan(pos_type pos) const
1296 {
1297         BOOST_ASSERT(pos <= size());
1298         pos_type start = 0;
1299
1300         FontList::const_iterator cit = d->fontlist_.begin();
1301         FontList::const_iterator end = d->fontlist_.end();
1302         for (; cit != end; ++cit) {
1303                 if (cit->pos() >= pos) {
1304                         if (pos >= beginOfBody())
1305                                 return FontSpan(std::max(start, beginOfBody()),
1306                                                 cit->pos());
1307                         else
1308                                 return FontSpan(start,
1309                                                 std::min(beginOfBody() - 1,
1310                                                          cit->pos()));
1311                 }
1312                 start = cit->pos() + 1;
1313         }
1314
1315         // This should not happen, but if so, we take no chances.
1316         //lyxerr << "Paragraph::getEndPosOfFontSpan: This should not happen!"
1317         //      << endl;
1318         return FontSpan(pos, pos);
1319 }
1320
1321
1322 // Gets uninstantiated font setting at position 0
1323 Font const Paragraph::getFirstFontSettings(BufferParams const & bparams) const
1324 {
1325         if (!empty() && !d->fontlist_.empty())
1326                 return d->fontlist_.begin()->font();
1327
1328         return Font(Font::ALL_INHERIT, bparams.language);
1329 }
1330
1331
1332 // Gets the fully instantiated font at a given position in a paragraph
1333 // This is basically the same function as Text::GetFont() in text2.cpp.
1334 // The difference is that this one is used for generating the LaTeX file,
1335 // and thus cosmetic "improvements" are disallowed: This has to deliver
1336 // the true picture of the buffer. (Asger)
1337 Font const Paragraph::getFont(BufferParams const & bparams, pos_type pos,
1338                                  Font const & outerfont) const
1339 {
1340         BOOST_ASSERT(pos >= 0);
1341
1342         Font font = getFontSettings(bparams, pos);
1343
1344         pos_type const body_pos = beginOfBody();
1345         if (pos < body_pos)
1346                 font.realize(d->layout_->labelfont);
1347         else
1348                 font.realize(d->layout_->font);
1349
1350         font.realize(outerfont);
1351         font.realize(bparams.getFont());
1352
1353         return font;
1354 }
1355
1356
1357 Font const Paragraph::getLabelFont
1358         (BufferParams const & bparams, Font const & outerfont) const
1359 {
1360         Font tmpfont = layout()->labelfont;
1361         tmpfont.setLanguage(getParLanguage(bparams));
1362         tmpfont.realize(outerfont);
1363         tmpfont.realize(bparams.getFont());
1364         return tmpfont;
1365 }
1366
1367
1368 Font const Paragraph::getLayoutFont
1369         (BufferParams const & bparams, Font const & outerfont) const
1370 {
1371         Font tmpfont = layout()->font;
1372         tmpfont.setLanguage(getParLanguage(bparams));
1373         tmpfont.realize(outerfont);
1374         tmpfont.realize(bparams.getFont());
1375         return tmpfont;
1376 }
1377
1378
1379 /// Returns the height of the highest font in range
1380 Font_size Paragraph::highestFontInRange
1381         (pos_type startpos, pos_type endpos, Font_size def_size) const
1382 {
1383         return d->fontlist_.highestInRange(startpos, endpos, def_size);
1384 }
1385
1386
1387 Paragraph::value_type
1388 Paragraph::getUChar(BufferParams const & bparams, pos_type pos) const
1389 {
1390         value_type c = getChar(pos);
1391         if (!lyxrc.rtl_support)
1392                 return c;
1393
1394         value_type uc = c;
1395         switch (c) {
1396         case '(':
1397                 uc = ')';
1398                 break;
1399         case ')':
1400                 uc = '(';
1401                 break;
1402         case '[':
1403                 uc = ']';
1404                 break;
1405         case ']':
1406                 uc = '[';
1407                 break;
1408         case '{':
1409                 uc = '}';
1410                 break;
1411         case '}':
1412                 uc = '{';
1413                 break;
1414         case '<':
1415                 uc = '>';
1416                 break;
1417         case '>':
1418                 uc = '<';
1419                 break;
1420         }
1421         if (uc != c && getFontSettings(bparams, pos).isRightToLeft())
1422                 return uc;
1423         else
1424                 return c;
1425 }
1426
1427
1428 void Paragraph::setFont(pos_type pos, Font const & font)
1429 {
1430         BOOST_ASSERT(pos <= size());
1431
1432         // First, reduce font against layout/label font
1433         // Update: The setCharFont() routine in text2.cpp already
1434         // reduces font, so we don't need to do that here. (Asger)
1435
1436         d->fontlist_.set(pos, font);
1437 }
1438
1439
1440 void Paragraph::makeSameLayout(Paragraph const & par)
1441 {
1442         layout(par.layout());
1443         // move to pimpl?
1444         d->params_ = par.params();
1445 }
1446
1447
1448 bool Paragraph::stripLeadingSpaces(bool trackChanges)
1449 {
1450         if (isFreeSpacing())
1451                 return false;
1452
1453         int pos = 0;
1454         int count = 0;
1455
1456         while (pos < size() && (isNewline(pos) || isLineSeparator(pos))) {
1457                 if (eraseChar(pos, trackChanges))
1458                         ++count;
1459                 else
1460                         ++pos;
1461         }
1462
1463         return count > 0 || pos > 0;
1464 }
1465
1466
1467 bool Paragraph::hasSameLayout(Paragraph const & par) const
1468 {
1469         return par.layout() == layout() && d->params_.sameLayout(par.params());
1470 }
1471
1472
1473 depth_type Paragraph::getDepth() const
1474 {
1475         return params().depth();
1476 }
1477
1478
1479 depth_type Paragraph::getMaxDepthAfter() const
1480 {
1481         if (layout()->isEnvironment())
1482                 return params().depth() + 1;
1483         else
1484                 return params().depth();
1485 }
1486
1487
1488 char Paragraph::getAlign() const
1489 {
1490         if (params().align() == LYX_ALIGN_LAYOUT)
1491                 return layout()->align;
1492         else
1493                 return params().align();
1494 }
1495
1496
1497 docstring const & Paragraph::getLabelstring() const
1498 {
1499         return params().labelString();
1500 }
1501
1502
1503 // the next two functions are for the manual labels
1504 docstring const Paragraph::getLabelWidthString() const
1505 {
1506         if (layout()->margintype == MARGIN_MANUAL)
1507                 return params().labelWidthString();
1508         else
1509                 return _("Senseless with this layout!");
1510 }
1511
1512
1513 void Paragraph::setLabelWidthString(docstring const & s)
1514 {
1515         params().labelWidthString(s);
1516 }
1517
1518
1519 docstring const Paragraph::translateIfPossible(docstring const & s,
1520                 BufferParams const & bparams) const
1521 {
1522         if (!support::isAscii(s) || s.empty()) {
1523                 // This must be a user defined layout. We cannot translate
1524                 // this, since gettext accepts only ascii keys.
1525                 return s;
1526         }
1527         // Probably standard layout, try to translate
1528         Messages & m = getMessages(getParLanguage(bparams)->code());
1529         return m.get(to_ascii(s));
1530 }
1531
1532
1533 docstring Paragraph::expandLabel(LayoutPtr const & layout,
1534                 BufferParams const & bparams, bool process_appendix) const
1535 {
1536         TextClass const & tclass = bparams.getTextClass();
1537
1538         docstring fmt;
1539         if (process_appendix && params().appendix())
1540                 fmt = translateIfPossible(layout->labelstring_appendix(),
1541                         bparams);
1542         else
1543                 fmt = translateIfPossible(layout->labelstring(), bparams);
1544
1545         if (fmt.empty() && layout->labeltype == LABEL_COUNTER
1546             && !layout->counter.empty())
1547                 fmt = "\\the" + layout->counter;
1548
1549         // handle 'inherited level parts' in 'fmt',
1550         // i.e. the stuff between '@' in   '@Section@.\arabic{subsection}'
1551         size_t const i = fmt.find('@', 0);
1552         if (i != docstring::npos) {
1553                 size_t const j = fmt.find('@', i + 1);
1554                 if (j != docstring::npos) {
1555                         docstring parent(fmt, i + 1, j - i - 1);
1556                         docstring label = from_ascii("??");
1557                         if (tclass.hasLayout(parent))
1558                                 docstring label = expandLabel(tclass[parent], bparams,
1559                                                       process_appendix);
1560                         fmt = docstring(fmt, 0, i) + label
1561                                 + docstring(fmt, j + 1, docstring::npos);
1562                 }
1563         }
1564
1565         return tclass.counters().counterLabel(fmt);
1566 }
1567
1568
1569 void Paragraph::applyLayout(LayoutPtr const & new_layout)
1570 {
1571         layout(new_layout);
1572         LyXAlignment const oldAlign = params().align();
1573
1574         if (!(oldAlign & layout()->alignpossible)) {
1575                 frontend::Alert::warning(_("Alignment not permitted"),
1576                         _("The new layout does not permit the alignment previously used.\nSetting to default."));
1577                 params().align(LYX_ALIGN_LAYOUT);
1578         }
1579 }
1580
1581
1582 pos_type Paragraph::beginOfBody() const
1583 {
1584         return d->begin_of_body_;
1585 }
1586
1587
1588 void Paragraph::setBeginOfBody()
1589 {
1590         if (layout()->labeltype != LABEL_MANUAL) {
1591                 d->begin_of_body_ = 0;
1592                 return;
1593         }
1594
1595         // Unroll the first two cycles of the loop
1596         // and remember the previous character to
1597         // remove unnecessary getChar() calls
1598         pos_type i = 0;
1599         pos_type end = size();
1600         if (i < end && !isNewline(i)) {
1601                 ++i;
1602                 char_type previous_char = 0;
1603                 char_type temp = 0;
1604                 if (i < end) {
1605                         previous_char = text_[i];
1606                         if (!isNewline(i)) {
1607                                 ++i;
1608                                 while (i < end && previous_char != ' ') {
1609                                         temp = text_[i];
1610                                         if (isNewline(i))
1611                                                 break;
1612                                         ++i;
1613                                         previous_char = temp;
1614                                 }
1615                         }
1616                 }
1617         }
1618
1619         d->begin_of_body_ = i;
1620 }
1621
1622
1623 InsetBibitem * Paragraph::bibitem() const
1624 {
1625         if (!d->insetlist_.empty()) {
1626                 Inset * inset = d->insetlist_.begin()->inset;
1627                 if (inset->lyxCode() == BIBITEM_CODE)
1628                         return static_cast<InsetBibitem *>(inset);
1629         }
1630         return 0;
1631 }
1632
1633
1634 bool Paragraph::forceDefaultParagraphs() const
1635 {
1636         return inInset() && inInset()->forceDefaultParagraphs(0);
1637 }
1638
1639
1640 namespace {
1641
1642 // paragraphs inside floats need different alignment tags to avoid
1643 // unwanted space
1644
1645 bool noTrivlistCentering(InsetCode code)
1646 {
1647         return code == FLOAT_CODE || code == WRAP_CODE;
1648 }
1649
1650
1651 string correction(string const & orig)
1652 {
1653         if (orig == "flushleft")
1654                 return "raggedright";
1655         if (orig == "flushright")
1656                 return "raggedleft";
1657         if (orig == "center")
1658                 return "centering";
1659         return orig;
1660 }
1661
1662
1663 string const corrected_env(string const & suffix, string const & env,
1664         InsetCode code)
1665 {
1666         string output = suffix + "{";
1667         if (noTrivlistCentering(code))
1668                 output += correction(env);
1669         else
1670                 output += env;
1671         output += "}";
1672         if (suffix == "\\begin")
1673                 output += "\n";
1674         return output;
1675 }
1676
1677
1678 void adjust_row_column(string const & str, TexRow & texrow, int & column)
1679 {
1680         if (!contains(str, "\n"))
1681                 column += str.size();
1682         else {
1683                 string tmp;
1684                 texrow.newline();
1685                 column = rsplit(str, tmp, '\n').size();
1686         }
1687 }
1688
1689 } // namespace anon
1690
1691
1692 int Paragraph::Private::startTeXParParams(BufferParams const & bparams,
1693                                  odocstream & os, TexRow & texrow,
1694                                  bool moving_arg) const
1695 {
1696         int column = 0;
1697
1698         if (params_.noindent()) {
1699                 os << "\\noindent ";
1700                 column += 10;
1701         }
1702
1703         LyXAlignment const curAlign = params_.align();
1704
1705         if (curAlign == layout_->align)
1706                 return column;
1707
1708         switch (curAlign) {
1709         case LYX_ALIGN_NONE:
1710         case LYX_ALIGN_BLOCK:
1711         case LYX_ALIGN_LAYOUT:
1712         case LYX_ALIGN_SPECIAL:
1713                 break;
1714         case LYX_ALIGN_LEFT:
1715         case LYX_ALIGN_RIGHT:
1716         case LYX_ALIGN_CENTER:
1717                 if (moving_arg) {
1718                         os << "\\protect";
1719                         column += 8;
1720                 }
1721                 break;
1722         }
1723
1724         switch (curAlign) {
1725         case LYX_ALIGN_NONE:
1726         case LYX_ALIGN_BLOCK:
1727         case LYX_ALIGN_LAYOUT:
1728         case LYX_ALIGN_SPECIAL:
1729                 break;
1730         case LYX_ALIGN_LEFT: {
1731                 string output;
1732                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
1733                         output = corrected_env("\\begin", "flushleft", owner_->ownerCode());
1734                 else
1735                         output = corrected_env("\\begin", "flushright", owner_->ownerCode());
1736                 os << from_ascii(output);
1737                 adjust_row_column(output, texrow, column);
1738                 break;
1739         } case LYX_ALIGN_RIGHT: {
1740                 string output;
1741                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
1742                         output = corrected_env("\\begin", "flushright", owner_->ownerCode());
1743                 else
1744                         output = corrected_env("\\begin", "flushleft", owner_->ownerCode());
1745                 os << from_ascii(output);
1746                 adjust_row_column(output, texrow, column);
1747                 break;
1748         } case LYX_ALIGN_CENTER: {
1749                 string output;
1750                 output = corrected_env("\\begin", "center", owner_->ownerCode());
1751                 os << from_ascii(output);
1752                 adjust_row_column(output, texrow, column);
1753                 break;
1754         }
1755         }
1756
1757         return column;
1758 }
1759
1760
1761 int Paragraph::Private::endTeXParParams(BufferParams const & bparams,
1762                                odocstream & os, TexRow & texrow,
1763                                bool moving_arg) const
1764 {
1765         int column = 0;
1766
1767         switch (params_.align()) {
1768         case LYX_ALIGN_NONE:
1769         case LYX_ALIGN_BLOCK:
1770         case LYX_ALIGN_LAYOUT:
1771         case LYX_ALIGN_SPECIAL:
1772                 break;
1773         case LYX_ALIGN_LEFT:
1774         case LYX_ALIGN_RIGHT:
1775         case LYX_ALIGN_CENTER:
1776                 if (moving_arg) {
1777                         os << "\\protect";
1778                         column = 8;
1779                 }
1780                 break;
1781         }
1782
1783         switch (params_.align()) {
1784         case LYX_ALIGN_NONE:
1785         case LYX_ALIGN_BLOCK:
1786         case LYX_ALIGN_LAYOUT:
1787         case LYX_ALIGN_SPECIAL:
1788                 break;
1789         case LYX_ALIGN_LEFT: {
1790                 string output;
1791                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
1792                         output = corrected_env("\n\\par\\end", "flushleft", owner_->ownerCode());
1793                 else
1794                         output = corrected_env("\n\\par\\end", "flushright", owner_->ownerCode());
1795                 os << from_ascii(output);
1796                 adjust_row_column(output, texrow, column);
1797                 break;
1798         } case LYX_ALIGN_RIGHT: {
1799                 string output;
1800                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
1801                         output = corrected_env("\n\\par\\end", "flushright", owner_->ownerCode());
1802                 else
1803                         output = corrected_env("\n\\par\\end", "flushleft", owner_->ownerCode());
1804                 os << from_ascii(output);
1805                 adjust_row_column(output, texrow, column);
1806                 break;
1807         } case LYX_ALIGN_CENTER: {
1808                 string output;
1809                 output = corrected_env("\n\\par\\end", "center", owner_->ownerCode());
1810                 os << from_ascii(output);
1811                 adjust_row_column(output, texrow, column);
1812                 break;
1813         }
1814         }
1815
1816         return column;
1817 }
1818
1819
1820 // This one spits out the text of the paragraph
1821 bool Paragraph::latex(Buffer const & buf,
1822                                 BufferParams const & bparams,
1823                                 Font const & outerfont,
1824                                 odocstream & os, TexRow & texrow,
1825                                 OutputParams const & runparams) const
1826 {
1827         LYXERR(Debug::LATEX) << "SimpleTeXOnePar...     " << this << endl;
1828
1829         bool return_value = false;
1830
1831         LayoutPtr style;
1832
1833         // well we have to check if we are in an inset with unlimited
1834         // length (all in one row) if that is true then we don't allow
1835         // any special options in the paragraph and also we don't allow
1836         // any environment other than the default layout of the text class
1837         // to be valid!
1838         bool asdefault = forceDefaultParagraphs();
1839
1840         if (asdefault) {
1841                 style = bparams.getTextClass().defaultLayout();
1842         } else {
1843                 style = layout();
1844         }
1845
1846         // Current base font for all inherited font changes, without any
1847         // change caused by an individual character, except for the language:
1848         // It is set to the language of the first character.
1849         // As long as we are in the label, this font is the base font of the
1850         // label. Before the first body character it is set to the base font
1851         // of the body.
1852         Font basefont;
1853
1854         // Maybe we have to create a optional argument.
1855         pos_type body_pos = beginOfBody();
1856         unsigned int column = 0;
1857
1858         if (body_pos > 0) {
1859                 // the optional argument is kept in curly brackets in
1860                 // case it contains a ']'
1861                 os << "[{";
1862                 column += 2;
1863                 basefont = getLabelFont(bparams, outerfont);
1864         } else {
1865                 basefont = getLayoutFont(bparams, outerfont);
1866         }
1867
1868         // Which font is currently active?
1869         Font running_font(basefont);
1870         // Do we have an open font change?
1871         bool open_font = false;
1872
1873         Change runningChange = Change(Change::UNCHANGED);
1874
1875         texrow.start(id(), 0);
1876
1877         // if the paragraph is empty, the loop will not be entered at all
1878         if (empty()) {
1879                 if (style->isCommand()) {
1880                         os << '{';
1881                         ++column;
1882                 }
1883                 if (!asdefault)
1884                         column += d->startTeXParParams(bparams, os, texrow,
1885                                                     runparams.moving_arg);
1886         }
1887
1888         for (pos_type i = 0; i < size(); ++i) {
1889                 // First char in paragraph or after label?
1890                 if (i == body_pos) {
1891                         if (body_pos > 0) {
1892                                 if (open_font) {
1893                                         column += running_font.latexWriteEndChanges(
1894                                                 os, bparams, runparams,
1895                                                 basefont, basefont);
1896                                         open_font = false;
1897                                 }
1898                                 basefont = getLayoutFont(bparams, outerfont);
1899                                 running_font = basefont;
1900
1901                                 column += Changes::latexMarkChange(os, bparams,
1902                                                 runningChange, Change(Change::UNCHANGED));
1903                                 runningChange = Change(Change::UNCHANGED);
1904
1905                                 os << "}] ";
1906                                 column +=3;
1907                         }
1908                         if (style->isCommand()) {
1909                                 os << '{';
1910                                 ++column;
1911                         }
1912
1913                         if (!asdefault)
1914                                 column += d->startTeXParParams(bparams, os,
1915                                                             texrow,
1916                                                             runparams.moving_arg);
1917                 }
1918
1919                 Change const & change = runparams.inDeletedInset ? runparams.changeOfDeletedInset
1920                                                                  : lookupChange(i);
1921
1922                 if (bparams.outputChanges && runningChange != change) {
1923                         if (open_font) {
1924                                 column += running_font.latexWriteEndChanges(
1925                                                 os, bparams, runparams, basefont, basefont);
1926                                 open_font = false;
1927                         }
1928                         basefont = getLayoutFont(bparams, outerfont);
1929                         running_font = basefont;
1930
1931                         column += Changes::latexMarkChange(os, bparams, runningChange, change);
1932                         runningChange = change;
1933                 }
1934
1935                 // do not output text which is marked deleted
1936                 // if change tracking output is disabled
1937                 if (!bparams.outputChanges && change.type == Change::DELETED) {
1938                         continue;
1939                 }
1940
1941                 ++column;
1942
1943                 // Fully instantiated font
1944                 Font const font = getFont(bparams, i, outerfont);
1945
1946                 Font const last_font = running_font;
1947
1948                 // Do we need to close the previous font?
1949                 if (open_font &&
1950                     (font != running_font ||
1951                      font.language() != running_font.language()))
1952                 {
1953                         column += running_font.latexWriteEndChanges(
1954                                         os, bparams, runparams, basefont,
1955                                         (i == body_pos-1) ? basefont : font);
1956                         running_font = basefont;
1957                         open_font = false;
1958                 }
1959
1960                 // Switch file encoding if necessary (and allowed)
1961                 if (!runparams.verbatim &&
1962                     runparams.encoding->package() == Encoding::inputenc &&
1963                     font.language()->encoding()->package() == Encoding::inputenc) {
1964                         std::pair<bool, int> const enc_switch = switchEncoding(os, bparams,
1965                                         runparams.moving_arg, *(runparams.encoding),
1966                                         *(font.language()->encoding()));
1967                         if (enc_switch.first) {
1968                                 column += enc_switch.second;
1969                                 runparams.encoding = font.language()->encoding();
1970                         }
1971                 }
1972
1973                 value_type const c = getChar(i);
1974
1975                 // Do we need to change font?
1976                 if ((font != running_font ||
1977                      font.language() != running_font.language()) &&
1978                         i != body_pos - 1)
1979                 {
1980                         odocstringstream ods;
1981                         column += font.latexWriteStartChanges(ods, bparams,
1982                                                               runparams, basefont,
1983                                                               last_font);
1984                         running_font = font;
1985                         open_font = true;
1986                         docstring fontchange = ods.str();
1987                         // check if the fontchange ends with a trailing blank
1988                         // (like "\small " (see bug 3382)
1989                         if (suffixIs(fontchange, ' ') && c == ' ')
1990                                 os << fontchange.substr(0, fontchange.size() - 1)
1991                                    << from_ascii("{}");
1992                         else
1993                                 os << fontchange;
1994                 }
1995
1996                 if (c == ' ') {
1997                         // FIXME: integrate this case in latexSpecialChar
1998                         // Do not print the separation of the optional argument
1999                         // if style->pass_thru is false. This works because
2000                         // latexSpecialChar ignores spaces if
2001                         // style->pass_thru is false.
2002                         if (i != body_pos - 1) {
2003                                 if (d->simpleTeXBlanks(
2004                                                 *(runparams.encoding), os, texrow,
2005                                                 i, column, font, *style)) {
2006                                         // A surrogate pair was output. We
2007                                         // must not call latexSpecialChar
2008                                         // in this iteration, since it would output
2009                                         // the combining character again.
2010                                         ++i;
2011                                         continue;
2012                                 }
2013                         }
2014                 }
2015
2016                 OutputParams rp = runparams;
2017                 rp.free_spacing = style->free_spacing;
2018                 rp.local_font = &font;
2019                 rp.intitle = style->intitle;
2020
2021                 // Two major modes:  LaTeX or plain
2022                 // Handle here those cases common to both modes
2023                 // and then split to handle the two modes separately.
2024                 if (c == Paragraph::META_INSET)
2025                         d->latexInset(buf, bparams, os,
2026                                         texrow, rp, running_font,
2027                                         basefont, outerfont, open_font,
2028                                         runningChange, *style, i, column);
2029                 else
2030                         d->latexSpecialChar(os, rp, running_font, runningChange,
2031                                 *style, i, column);
2032
2033                 // Set the encoding to that returned from simpleTeXSpecialChars (see
2034                 // comment for encoding member in OutputParams.h)
2035                 runparams.encoding = rp.encoding;
2036         }
2037
2038         // If we have an open font definition, we have to close it
2039         if (open_font) {
2040 #ifdef FIXED_LANGUAGE_END_DETECTION
2041                 if (next_) {
2042                         running_font
2043                                 .latexWriteEndChanges(os, bparams, runparams,
2044                                         basefont,
2045                                         next_->getFont(bparams, 0, outerfont));
2046                 } else {
2047                         running_font.latexWriteEndChanges(os, bparams,
2048                                         runparams, basefont, basefont);
2049                 }
2050 #else
2051 //FIXME: For now we ALWAYS have to close the foreign font settings if they are
2052 //FIXME: there as we start another \selectlanguage with the next paragraph if
2053 //FIXME: we are in need of this. This should be fixed sometime (Jug)
2054                 running_font.latexWriteEndChanges(os, bparams, runparams,
2055                                 basefont, basefont);
2056 #endif
2057         }
2058
2059         column += Changes::latexMarkChange(os, bparams, runningChange, Change(Change::UNCHANGED));
2060
2061         // Needed if there is an optional argument but no contents.
2062         if (body_pos > 0 && body_pos == size()) {
2063                 os << "}]~";
2064                 return_value = false;
2065         }
2066
2067         if (!asdefault) {
2068                 column += d->endTeXParParams(bparams, os, texrow,
2069                                           runparams.moving_arg);
2070         }
2071
2072         LYXERR(Debug::LATEX) << "SimpleTeXOnePar...done " << this << endl;
2073         return return_value;
2074 }
2075
2076
2077 namespace {
2078
2079 enum PAR_TAG {
2080         PAR_NONE=0,
2081         TT = 1,
2082         SF = 2,
2083         BF = 4,
2084         IT = 8,
2085         SL = 16,
2086         EM = 32
2087 };
2088
2089
2090 string tag_name(PAR_TAG const & pt) {
2091         switch (pt) {
2092         case PAR_NONE: return "!-- --";
2093         case TT: return "tt";
2094         case SF: return "sf";
2095         case BF: return "bf";
2096         case IT: return "it";
2097         case SL: return "sl";
2098         case EM: return "em";
2099         }
2100         return "";
2101 }
2102
2103
2104 inline
2105 void operator|=(PAR_TAG & p1, PAR_TAG const & p2)
2106 {
2107         p1 = static_cast<PAR_TAG>(p1 | p2);
2108 }
2109
2110
2111 inline
2112 void reset(PAR_TAG & p1, PAR_TAG const & p2)
2113 {
2114         p1 = static_cast<PAR_TAG>(p1 & ~p2);
2115 }
2116
2117 } // anon
2118
2119
2120 bool Paragraph::emptyTag() const
2121 {
2122         for (pos_type i = 0; i < size(); ++i) {
2123                 if (isInset(i)) {
2124                         Inset const * inset = getInset(i);
2125                         InsetCode lyx_code = inset->lyxCode();
2126                         if (lyx_code != TOC_CODE &&
2127                             lyx_code != INCLUDE_CODE &&
2128                             lyx_code != GRAPHICS_CODE &&
2129                             lyx_code != ERT_CODE &&
2130                             lyx_code != LISTINGS_CODE &&
2131                             lyx_code != FLOAT_CODE &&
2132                             lyx_code != TABULAR_CODE) {
2133                                 return false;
2134                         }
2135                 } else {
2136                         value_type c = getChar(i);
2137                         if (c != ' ' && c != '\t')
2138                                 return false;
2139                 }
2140         }
2141         return true;
2142 }
2143
2144
2145 string Paragraph::getID(Buffer const & buf, OutputParams const & runparams) const
2146 {
2147         for (pos_type i = 0; i < size(); ++i) {
2148                 if (isInset(i)) {
2149                         Inset const * inset = getInset(i);
2150                         InsetCode lyx_code = inset->lyxCode();
2151                         if (lyx_code == LABEL_CODE) {
2152                                 string const id = static_cast<InsetCommand const *>(inset)->getContents();
2153                                 return "id='" + to_utf8(sgml::cleanID(buf, runparams, from_utf8(id))) + "'";
2154                         }
2155                 }
2156
2157         }
2158         return string();
2159 }
2160
2161
2162 pos_type Paragraph::getFirstWord(Buffer const & buf, odocstream & os, OutputParams const & runparams) const
2163 {
2164         pos_type i;
2165         for (i = 0; i < size(); ++i) {
2166                 if (isInset(i)) {
2167                         Inset const * inset = getInset(i);
2168                         inset->docbook(buf, os, runparams);
2169                 } else {
2170                         value_type c = getChar(i);
2171                         if (c == ' ')
2172                                 break;
2173                         os << sgml::escapeChar(c);
2174                 }
2175         }
2176         return i;
2177 }
2178
2179
2180 bool Paragraph::onlyText(Buffer const & buf, Font const & outerfont, pos_type initial) const
2181 {
2182         Font font_old;
2183
2184         for (pos_type i = initial; i < size(); ++i) {
2185                 Font font = getFont(buf.params(), i, outerfont);
2186                 if (isInset(i))
2187                         return false;
2188                 if (i != initial && font != font_old)
2189                         return false;
2190                 font_old = font;
2191         }
2192
2193         return true;
2194 }
2195
2196
2197 void Paragraph::simpleDocBookOnePar(Buffer const & buf,
2198                                     odocstream & os,
2199                                     OutputParams const & runparams,
2200                                     Font const & outerfont,
2201                                     pos_type initial) const
2202 {
2203         bool emph_flag = false;
2204
2205         LayoutPtr const & style = layout();
2206         Font font_old =
2207                 style->labeltype == LABEL_MANUAL ? style->labelfont : style->font;
2208
2209         if (style->pass_thru && !onlyText(buf, outerfont, initial))
2210                 os << "]]>";
2211
2212         // parsing main loop
2213         for (pos_type i = initial; i < size(); ++i) {
2214                 Font font = getFont(buf.params(), i, outerfont);
2215
2216                 // handle <emphasis> tag
2217                 if (font_old.emph() != font.emph()) {
2218                         if (font.emph() == Font::ON) {
2219                                 os << "<emphasis>";
2220                                 emph_flag = true;
2221                         } else if (i != initial) {
2222                                 os << "</emphasis>";
2223                                 emph_flag = false;
2224                         }
2225                 }
2226
2227                 if (isInset(i)) {
2228                         Inset const * inset = getInset(i);
2229                         inset->docbook(buf, os, runparams);
2230                 } else {
2231                         value_type c = getChar(i);
2232
2233                         if (style->pass_thru)
2234                                 os.put(c);
2235                         else
2236                                 os << sgml::escapeChar(c);
2237                 }
2238                 font_old = font;
2239         }
2240
2241         if (emph_flag) {
2242                 os << "</emphasis>";
2243         }
2244
2245         if (style->free_spacing)
2246                 os << '\n';
2247         if (style->pass_thru && !onlyText(buf, outerfont, initial))
2248                 os << "<![CDATA[";
2249 }
2250
2251
2252 bool Paragraph::isHfill(pos_type pos) const
2253 {
2254         return isInset(pos)
2255                 && getInset(pos)->lyxCode() == HFILL_CODE;
2256 }
2257
2258
2259 bool Paragraph::isNewline(pos_type pos) const
2260 {
2261         return isInset(pos)
2262                 && getInset(pos)->lyxCode() == NEWLINE_CODE;
2263 }
2264
2265
2266 bool Paragraph::isLineSeparator(pos_type pos) const
2267 {
2268         value_type const c = getChar(pos);
2269         return isLineSeparatorChar(c)
2270                 || (c == Paragraph::META_INSET && getInset(pos) &&
2271                 getInset(pos)->isLineSeparator());
2272 }
2273
2274
2275 /// Used by the spellchecker
2276 bool Paragraph::isLetter(pos_type pos) const
2277 {
2278         if (isInset(pos))
2279                 return getInset(pos)->isLetter();
2280         else {
2281                 value_type const c = getChar(pos);
2282                 return isLetterChar(c) || isDigit(c);
2283         }
2284 }
2285
2286
2287 Language const *
2288 Paragraph::getParLanguage(BufferParams const & bparams) const
2289 {
2290         if (!empty())
2291                 return getFirstFontSettings(bparams).language();
2292         // FIXME: we should check the prev par as well (Lgb)
2293         return bparams.language;
2294 }
2295
2296
2297 bool Paragraph::isRTL(BufferParams const & bparams) const
2298 {
2299         return lyxrc.rtl_support
2300                 && getParLanguage(bparams)->rightToLeft()
2301                 && ownerCode() != ERT_CODE
2302                 && ownerCode() != LISTINGS_CODE;
2303 }
2304
2305
2306 void Paragraph::changeLanguage(BufferParams const & bparams,
2307                                Language const * from, Language const * to)
2308 {
2309         // change language including dummy font change at the end
2310         for (pos_type i = 0; i <= size(); ++i) {
2311                 Font font = getFontSettings(bparams, i);
2312                 if (font.language() == from) {
2313                         font.setLanguage(to);
2314                         setFont(i, font);
2315                 }
2316         }
2317 }
2318
2319
2320 bool Paragraph::isMultiLingual(BufferParams const & bparams) const
2321 {
2322         Language const * doc_language = bparams.language;
2323         FontList::const_iterator cit = d->fontlist_.begin();
2324         FontList::const_iterator end = d->fontlist_.end();
2325
2326         for (; cit != end; ++cit)
2327                 if (cit->font().language() != ignore_language &&
2328                     cit->font().language() != latex_language &&
2329                     cit->font().language() != doc_language)
2330                         return true;
2331         return false;
2332 }
2333
2334
2335 // Convert the paragraph to a string.
2336 // Used for building the table of contents
2337 docstring const Paragraph::asString(Buffer const & buffer, bool label) const
2338 {
2339         return asString(buffer, 0, size(), label);
2340 }
2341
2342
2343 docstring const Paragraph::asString(Buffer const & buffer,
2344                                  pos_type beg, pos_type end, bool label) const
2345 {
2346
2347         odocstringstream os;
2348
2349         if (beg == 0 && label && !params().labelString().empty())
2350                 os << params().labelString() << ' ';
2351
2352         for (pos_type i = beg; i < end; ++i) {
2353                 value_type const c = getChar(i);
2354                 if (isPrintable(c))
2355                         os.put(c);
2356                 else if (c == META_INSET)
2357                         getInset(i)->textString(buffer, os);
2358         }
2359
2360         return os.str();
2361 }
2362
2363
2364 void Paragraph::setInsetOwner(Inset * inset)
2365 {
2366         d->inset_owner_ = inset;
2367 }
2368
2369
2370 int Paragraph::id() const
2371 {
2372         return d->id_;
2373 }
2374
2375
2376 LayoutPtr const & Paragraph::layout() const
2377 {
2378         return d->layout_;
2379 }
2380
2381
2382 void Paragraph::layout(LayoutPtr const & new_layout)
2383 {
2384         d->layout_ = new_layout;
2385 }
2386
2387
2388 Inset * Paragraph::inInset() const
2389 {
2390         return d->inset_owner_;
2391 }
2392
2393
2394 InsetCode Paragraph::ownerCode() const
2395 {
2396         return d->inset_owner_ ?
2397                 d->inset_owner_->lyxCode() : NO_CODE;
2398 }
2399
2400
2401 ParagraphParameters & Paragraph::params()
2402 {
2403         return d->params_;
2404 }
2405
2406
2407 ParagraphParameters const & Paragraph::params() const
2408 {
2409         return d->params_;
2410 }
2411
2412
2413 bool Paragraph::isFreeSpacing() const
2414 {
2415         if (layout()->free_spacing)
2416                 return true;
2417
2418         // for now we just need this, later should we need this in some
2419         // other way we can always add a function to Inset too.
2420         return ownerCode() == ERT_CODE || ownerCode() == LISTINGS_CODE;
2421 }
2422
2423
2424 bool Paragraph::allowEmpty() const
2425 {
2426         if (layout()->keepempty)
2427                 return true;
2428         return ownerCode() == ERT_CODE || ownerCode() == LISTINGS_CODE;
2429 }
2430
2431
2432 char_type Paragraph::transformChar(char_type c, pos_type pos) const
2433 {
2434         if (!Encodings::is_arabic(c))
2435                 return c;
2436
2437         value_type prev_char = ' ';
2438         value_type next_char = ' ';
2439
2440         for (pos_type i = pos - 1; i >= 0; --i) {
2441                 value_type const par_char = getChar(i);
2442                 if (!Encodings::isComposeChar_arabic(par_char)) {
2443                         prev_char = par_char;
2444                         break;
2445                 }
2446         }
2447
2448         for (pos_type i = pos + 1, end = size(); i < end; ++i) {
2449                 value_type const par_char = getChar(i);
2450                 if (!Encodings::isComposeChar_arabic(par_char)) {
2451                         next_char = par_char;
2452                         break;
2453                 }
2454         }
2455
2456         if (Encodings::is_arabic(next_char)) {
2457                 if (Encodings::is_arabic(prev_char) &&
2458                         !Encodings::is_arabic_special(prev_char))
2459                         return Encodings::transformChar(c, Encodings::FORM_MEDIAL);
2460                 else
2461                         return Encodings::transformChar(c, Encodings::FORM_INITIAL);
2462         } else {
2463                 if (Encodings::is_arabic(prev_char) &&
2464                         !Encodings::is_arabic_special(prev_char))
2465                         return Encodings::transformChar(c, Encodings::FORM_FINAL);
2466                 else
2467                         return Encodings::transformChar(c, Encodings::FORM_ISOLATED);
2468         }
2469 }
2470
2471
2472 int Paragraph::checkBiblio(bool track_changes)
2473 {
2474         //FIXME From JS:
2475         //This is getting more and more a mess. ...We really should clean
2476         //up this bibitem issue for 1.6. See also bug 2743.
2477
2478         // Add bibitem insets if necessary
2479         if (layout()->labeltype != LABEL_BIBLIO)
2480                 return 0;
2481
2482         bool hasbibitem = !d->insetlist_.empty()
2483                 // Insist on it being in pos 0
2484                 && getChar(0) == Paragraph::META_INSET
2485                 && d->insetlist_.begin()->inset->lyxCode() == BIBITEM_CODE;
2486
2487         docstring oldkey;
2488         docstring oldlabel;
2489
2490         // remove a bibitem in pos != 0
2491         // restore it later in pos 0 if necessary
2492         // (e.g. if a user inserts contents _before_ the item)
2493         // we're assuming there's only one of these, which there
2494         // should be.
2495         int erasedInsetPosition = -1;
2496         InsetList::iterator it = d->insetlist_.begin();
2497         InsetList::iterator end = d->insetlist_.end();
2498         for (; it != end; ++it)
2499                 if (it->inset->lyxCode() == BIBITEM_CODE
2500                     && it->pos > 0) {
2501                         InsetBibitem * olditem = static_cast<InsetBibitem *>(it->inset);
2502                         oldkey = olditem->getParam("key");
2503                         oldlabel = olditem->getParam("label");
2504                         erasedInsetPosition = it->pos;
2505                         eraseChar(erasedInsetPosition, track_changes);
2506                         break;
2507         }
2508
2509         //There was an InsetBibitem at the beginning, and we didn't
2510         //have to erase one.
2511         if (hasbibitem && erasedInsetPosition < 0)
2512                         return 0;
2513
2514         //There was an InsetBibitem at the beginning and we did have to
2515         //erase one. So we give its properties to the beginning inset.
2516         if (hasbibitem) {
2517                 InsetBibitem * inset =
2518                         static_cast<InsetBibitem *>(d->insetlist_.begin()->inset);
2519                 if (!oldkey.empty())
2520                         inset->setParam("key", oldkey);
2521                 inset->setParam("label", oldlabel);
2522                 return -erasedInsetPosition;
2523         }
2524
2525         //There was no inset at the beginning, so we need to create one with
2526         //the key and label of the one we erased.
2527         InsetBibitem * inset(new InsetBibitem(InsetCommandParams(BIBITEM_CODE)));
2528         // restore values of previously deleted item in this par.
2529         if (!oldkey.empty())
2530                 inset->setParam("key", oldkey);
2531         inset->setParam("label", oldlabel);
2532         insertInset(0, static_cast<Inset *>(inset),
2533                     Change(track_changes ? Change::INSERTED : Change::UNCHANGED));
2534
2535         return 1;
2536 }
2537
2538
2539 void Paragraph::checkAuthors(AuthorList const & authorList)
2540 {
2541         d->changes_.checkAuthors(authorList);
2542 }
2543
2544
2545 bool Paragraph::isUnchanged(pos_type pos) const
2546 {
2547         return lookupChange(pos).type == Change::UNCHANGED;
2548 }
2549
2550
2551 bool Paragraph::isInserted(pos_type pos) const
2552 {
2553         return lookupChange(pos).type == Change::INSERTED;
2554 }
2555
2556
2557 bool Paragraph::isDeleted(pos_type pos) const
2558 {
2559         return lookupChange(pos).type == Change::DELETED;
2560 }
2561
2562
2563 InsetList const & Paragraph::insetList() const
2564 {
2565         return d->insetlist_;
2566 }
2567
2568
2569 Inset * Paragraph::releaseInset(pos_type pos)
2570 {
2571         Inset * inset = d->insetlist_.release(pos);
2572         /// does not honour change tracking!
2573         eraseChar(pos, false);
2574         return inset;
2575 }
2576
2577
2578 Inset * Paragraph::getInset(pos_type pos)
2579 {
2580         return d->insetlist_.get(pos);
2581 }
2582
2583
2584 Inset const * Paragraph::getInset(pos_type pos) const
2585 {
2586         return d->insetlist_.get(pos);
2587 }
2588
2589
2590 int Paragraph::numberOfOptArgs() const
2591 {
2592         int num = 0;
2593         InsetList::const_iterator it = insetList().begin();
2594         InsetList::const_iterator end = insetList().end();
2595         for (; it != end ; ++it) {
2596                 if (it->inset->lyxCode() == OPTARG_CODE)
2597                         ++num;
2598         }
2599         return num;
2600 }
2601
2602
2603 } // namespace lyx