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 "Layout.h"
  33 #include "Length.h"
  34 #include "Font.h"
  35 #include "FontList.h"
  36 #include "LyXRC.h"
  37 #include "Messages.h"
  38 #include "OutputParams.h"
  39 #include "output_latex.h"
  40 #include "paragraph_funcs.h"
  41 #include "ParagraphParameters.h"
  42 #include "sgml.h"
  43 #include "TexRow.h"
  44 #include "VSpace.h"
  45
  46 #include "frontends/alert.h"
  47 #include "frontends/FontMetrics.h"
  48
  49 #include "insets/InsetBibitem.h"
  50 #include "insets/InsetLabel.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 #include <vector>
  60
  61 using std::endl;
  62 using std::string;
  63 using std::ostream;
  64
  65 namespace lyx {
  66
  67 using support::contains;
  68 using support::lowercase;
  69 using support::prefixIs;
  70 using support::suffixIs;
  71 using support::rsplit;
  72 using support::uppercase;
  73
  74 namespace {
  75 /// Inset identifier (above 0x10ffff, for ucs-4)
  76 char_type const META_INSET = 0x200001;
  77 };
  78
  79 /////////////////////////////////////////////////////////////////////
  80 //
  81 // Paragraph::Private
  82 //
  83 /////////////////////////////////////////////////////////////////////
  84
  85 class Paragraph::Private
  86 {
  87 public:
  88         ///
  89         Private(Paragraph * owner);
  90         /// "Copy constructor"
  91         Private(Private const &, Paragraph * owner);
  92
  93         ///
  94         void insertChar(pos_type pos, char_type c, Change const & change);
  95
  96         /// Output the surrogate pair formed by \p c and \p next to \p os.
  97         /// \return the number of characters written.
  98         int latexSurrogatePair(odocstream & os, char_type c, char_type next,
  99                                Encoding const &);
 100
 101         /// Output a space in appropriate formatting (or a surrogate pair
 102         /// if the next character is a combining character).
 103         /// \return whether a surrogate pair was output.
 104         bool simpleTeXBlanks(OutputParams const &,
 105                              odocstream &, TexRow & texrow,
 106                              pos_type i,
 107                              unsigned int & column,
 108                              Font const & font,
 109                              Layout const & style);
 110
 111         /// Output consecutive unicode chars, belonging to the same script as
 112         /// specified by the latex macro \p ltx, to \p os starting from \p c.
 113         /// \return the number of characters written.
 114         int writeScriptChars(odocstream & os, char_type c, docstring const & ltx,
 115                            Change &, Encoding const &, pos_type &);
 116
 117         /// This could go to ParagraphParameters if we want to.
 118         int startTeXParParams(BufferParams const &, odocstream &, TexRow &,
 119                               bool) const;
 120
 121         /// This could go to ParagraphParameters if we want to.
 122         int endTeXParParams(BufferParams const &, odocstream &, TexRow &,
 123                             bool) const;
 124
 125         ///
 126         void latexInset(Buffer const &, BufferParams const &,
 127                                    odocstream &,
 128                                    TexRow & texrow, OutputParams &,
 129                                    Font & running_font,
 130                                    Font & basefont,
 131                                    Font const & outerfont,
 132                                    bool & open_font,
 133                                    Change & running_change,
 134                                    Layout const & style,
 135                                    pos_type & i,
 136                                    unsigned int & column);
 137
 138         ///
 139         void latexSpecialChar(
 140                                    odocstream & os,
 141                                    OutputParams & runparams,
 142                                    Font & running_font,
 143                                    Change & running_change,
 144                                    Layout const & style,
 145                                    pos_type & i,
 146                                    unsigned int & column);
 147
 148         ///
 149         bool latexSpecialT1(
 150                 char_type const c,
 151                 odocstream & os,
 152                 pos_type & i,
 153                 unsigned int & column);
 154         ///
 155         bool latexSpecialTypewriter(
 156                 char_type const c,
 157                 odocstream & os,
 158                 pos_type & i,
 159                 unsigned int & column);
 160         ///
 161         bool latexSpecialPhrase(
 162                 odocstream & os,
 163                 pos_type & i,
 164                 unsigned int & column);
 165
 166         ///
 167         void validate(LaTeXFeatures & features,
 168                       Layout const & layout) const;
 169
 170         /// Checks if the paragraph contains only text and no inset or font change.
 171         bool onlyText(Buffer const & buf, Font const & outerfont,
 172                       pos_type initial) const;
 173
 174         /// match a string against a particular point in the paragraph
 175         bool isTextAt(std::string const & str, pos_type pos) const;
 176
 177         /// Which Paragraph owns us?
 178         Paragraph * owner_;
 179
 180         /// In which Inset?
 181         Inset * inset_owner_;
 182
 183         ///
 184         FontList fontlist_;
 185
 186         ///
 187         unsigned int id_;
 188         ///
 189         static unsigned int paragraph_id;
 190         ///
 191         ParagraphParameters params_;
 192
 193         /// for recording and looking up changes
 194         Changes changes_;
 195
 196         ///
 197         InsetList insetlist_;
 198
 199         ///
 200         LayoutPtr layout_;
 201
 202         /// end of label
 203         pos_type begin_of_body_;
 204
 205         typedef docstring TextContainer;
 206         ///
 207         TextContainer text_;
 208 };
 209
 210
 211
 212
 213 using std::endl;
 214 using std::upper_bound;
 215 using std::lower_bound;
 216 using std::string;
 217
 218
 219 // Initialization of the counter for the paragraph id's,
 220 unsigned int Paragraph::Private::paragraph_id = 0;
 221
 222 namespace {
 223
 224 struct special_phrase {
 225         string phrase;
 226         docstring macro;
 227         bool builtin;
 228 };
 229
 230 special_phrase const special_phrases[] = {
 231         { "LyX", from_ascii("\\protect\\LyX{}"), false },
 232         { "TeX", from_ascii("\\protect\\TeX{}"), true },
 233         { "LaTeX2e", from_ascii("\\protect\\LaTeXe{}"), true },
 234         { "LaTeX", from_ascii("\\protect\\LaTeX{}"), true },
 235 };
 236
 237 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
 238
 239 } // namespace anon
 240
 241
 242 Paragraph::Private::Private(Paragraph * owner)
 243         : owner_(owner), inset_owner_(0), begin_of_body_(0)
 244 {
 245         id_ = paragraph_id++;
 246         text_.reserve(100);
 247 }
 248
 249
 250 Paragraph::Private::Private(Private const & p, Paragraph * owner)
 251         : owner_(owner), inset_owner_(p.inset_owner_), fontlist_(p.fontlist_),
 252           params_(p.params_), changes_(p.changes_), insetlist_(p.insetlist_),
 253           layout_(p.layout_), begin_of_body_(p.begin_of_body_), text_(p.text_)
 254 {
 255         id_ = paragraph_id++;
 256 }
 257
 258
 259 bool Paragraph::isChanged(pos_type start, pos_type end) const
 260 {
 261         BOOST_ASSERT(start >= 0 && start <= size());
 262         BOOST_ASSERT(end > start && end <= size() + 1);
 263
 264         return d->changes_.isChanged(start, end);
 265 }
 266
 267
 268 bool Paragraph::isMergedOnEndOfParDeletion(bool trackChanges) const {
 269         // keep the logic here in sync with the logic of eraseChars()
 270
 271         if (!trackChanges) {
 272                 return true;
 273         }
 274
 275         Change change = d->changes_.lookup(size());
 276
 277         return change.type == Change::INSERTED && change.author == 0;
 278 }
 279
 280
 281 void Paragraph::setChange(Change const & change)
 282 {
 283         // beware of the imaginary end-of-par character!
 284         d->changes_.set(change, 0, size() + 1);
 285
 286         /*
 287          * Propagate the change recursively - but not in case of DELETED!
 288          *
 289          * Imagine that your co-author makes changes in an existing inset. He
 290          * sends your document to you and you come to the conclusion that the
 291          * inset should go completely. If you erase it, LyX must not delete all
 292          * text within the inset. Otherwise, the change tracked insertions of
 293          * your co-author get lost and there is no way to restore them later.
 294          *
 295          * Conclusion: An inset's content should remain untouched if you delete it
 296          */
 297
 298         if (change.type != Change::DELETED) {
 299                 for (pos_type pos = 0; pos < size(); ++pos) {
 300                         if (isInset(pos))
 301                                 getInset(pos)->setChange(change);
 302                 }
 303         }
 304 }
 305
 306
 307 void Paragraph::setChange(pos_type pos, Change const & change)
 308 {
 309         BOOST_ASSERT(pos >= 0 && pos <= size());
 310
 311         d->changes_.set(change, pos);
 312
 313         // see comment in setChange(Change const &) above
 314
 315         if (change.type != Change::DELETED &&
 316             pos < size() && isInset(pos)) {
 317                 getInset(pos)->setChange(change);
 318         }
 319 }
 320
 321
 322 Change const & Paragraph::lookupChange(pos_type pos) const
 323 {
 324         BOOST_ASSERT(pos >= 0 && pos <= size());
 325
 326         return d->changes_.lookup(pos);
 327 }
 328
 329
 330 void Paragraph::acceptChanges(BufferParams const & bparams, pos_type start,
 331                 pos_type end)
 332 {
 333         BOOST_ASSERT(start >= 0 && start <= size());
 334         BOOST_ASSERT(end > start && end <= size() + 1);
 335
 336         for (pos_type pos = start; pos < end; ++pos) {
 337                 switch (lookupChange(pos).type) {
 338                         case Change::UNCHANGED:
 339                                 // accept changes in nested inset
 340                                 if (pos < size() && isInset(pos))
 341                                         getInset(pos)->acceptChanges(bparams);
 342
 343                                 break;
 344
 345                         case Change::INSERTED:
 346                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 347                                 // also accept changes in nested inset
 348                                 if (pos < size() && isInset(pos)) {
 349                                         getInset(pos)->acceptChanges(bparams);
 350                                 }
 351                                 break;
 352
 353                         case Change::DELETED:
 354                                 // Suppress access to non-existent
 355                                 // "end-of-paragraph char"
 356                                 if (pos < size()) {
 357                                         eraseChar(pos, false);
 358                                         --end;
 359                                         --pos;
 360                                 }
 361                                 break;
 362                 }
 363
 364         }
 365 }
 366
 367
 368 void Paragraph::rejectChanges(BufferParams const & bparams,
 369                 pos_type start, pos_type end)
 370 {
 371         BOOST_ASSERT(start >= 0 && start <= size());
 372         BOOST_ASSERT(end > start && end <= size() + 1);
 373
 374         for (pos_type pos = start; pos < end; ++pos) {
 375                 switch (lookupChange(pos).type) {
 376                         case Change::UNCHANGED:
 377                                 // reject changes in nested inset
 378                                 if (pos < size() && isInset(pos)) {
 379                                         getInset(pos)->rejectChanges(bparams);
 380                                 }
 381                                 break;
 382
 383                         case Change::INSERTED:
 384                                 // Suppress access to non-existent
 385                                 // "end-of-paragraph char"
 386                                 if (pos < size()) {
 387                                         eraseChar(pos, false);
 388                                         --end;
 389                                         --pos;
 390                                 }
 391                                 break;
 392
 393                         case Change::DELETED:
 394                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 395
 396                                 // Do NOT reject changes within a deleted inset!
 397                                 // There may be insertions of a co-author inside of it!
 398
 399                                 break;
 400                 }
 401         }
 402 }
 403
 404
 405 void Paragraph::Private::insertChar(pos_type pos, char_type c,
 406                 Change const & change)
 407 {
 408         BOOST_ASSERT(pos >= 0 && pos <= int(text_.size()));
 409
 410         // track change
 411         changes_.insert(change, pos);
 412
 413         // This is actually very common when parsing buffers (and
 414         // maybe inserting ascii text)
 415         if (pos == text_.size()) {
 416                 // when appending characters, no need to update tables
 417                 text_.push_back(c);
 418                 return;
 419         }
 420
 421         text_.insert(text_.begin() + pos, c);
 422
 423         // Update the font table.
 424         fontlist_.increasePosAfterPos(pos);
 425
 426         // Update the insets
 427         insetlist_.increasePosAfterPos(pos);
 428 }
 429
 430
 431 void Paragraph::insertInset(pos_type pos, Inset * inset,
 432                                    Change const & change)
 433 {
 434         BOOST_ASSERT(inset);
 435         BOOST_ASSERT(pos >= 0 && pos <= size());
 436
 437         d->insertChar(pos, META_INSET, change);
 438         BOOST_ASSERT(d->text_[pos] == META_INSET);
 439
 440         // Add a new entry in the insetlist_.
 441         d->insetlist_.insert(inset, pos);
 442 }
 443
 444
 445 bool Paragraph::eraseChar(pos_type pos, bool trackChanges)
 446 {
 447         BOOST_ASSERT(pos >= 0 && pos <= size());
 448
 449         // keep the logic here in sync with the logic of isMergedOnEndOfParDeletion()
 450
 451         if (trackChanges) {
 452                 Change change = d->changes_.lookup(pos);
 453
 454                 // set the character to DELETED if
 455                 //  a) it was previously unchanged or
 456                 //  b) it was inserted by a co-author
 457
 458                 if (change.type == Change::UNCHANGED ||
 459                     (change.type == Change::INSERTED && change.author != 0)) {
 460                         setChange(pos, Change(Change::DELETED));
 461                         return false;
 462                 }
 463
 464                 if (change.type == Change::DELETED)
 465                         return false;
 466         }
 467
 468         // Don't physically access the imaginary end-of-paragraph character.
 469         // eraseChar() can only mark it as DELETED. A physical deletion of
 470         // end-of-par must be handled externally.
 471         if (pos == size()) {
 472                 return false;
 473         }
 474
 475         // track change
 476         d->changes_.erase(pos);
 477
 478         // if it is an inset, delete the inset entry
 479         if (d->text_[pos] == META_INSET)
 480                 d->insetlist_.erase(pos);
 481
 482         d->text_.erase(d->text_.begin() + pos);
 483
 484         // Update the fontlist_
 485         d->fontlist_.erase(pos);
 486
 487         // Update the insetlist_
 488         d->insetlist_.decreasePosAfterPos(pos);
 489
 490         return true;
 491 }
 492
 493
 494 int Paragraph::eraseChars(pos_type start, pos_type end, bool trackChanges)
 495 {
 496         BOOST_ASSERT(start >= 0 && start <= size());
 497         BOOST_ASSERT(end >= start && end <= size() + 1);
 498
 499         pos_type i = start;
 500         for (pos_type count = end - start; count; --count) {
 501                 if (!eraseChar(i, trackChanges))
 502                         ++i;
 503         }
 504         return end - i;
 505 }
 506
 507
 508 int Paragraph::Private::latexSurrogatePair(odocstream & os, char_type c,
 509                 char_type next, Encoding const & encoding)
 510 {
 511         // Writing next here may circumvent a possible font change between
 512         // c and next. Since next is only output if it forms a surrogate pair
 513         // with c we can ignore this:
 514         // A font change inside a surrogate pair does not make sense and is
 515         // hopefully impossible to input.
 516         // FIXME: change tracking
 517         // Is this correct WRT change tracking?
 518         docstring const latex1 = encoding.latexChar(next);
 519         docstring const latex2 = encoding.latexChar(c);
 520         os << latex1 << '{' << latex2 << '}';
 521         return latex1.length() + latex2.length() + 2;
 522 }
 523
 524
 525 bool Paragraph::Private::simpleTeXBlanks(OutputParams const & runparams,
 526                                        odocstream & os, TexRow & texrow,
 527                                        pos_type i,
 528                                        unsigned int & column,
 529                                        Font const & font,
 530                                        Layout const & style)
 531 {
 532         if (style.pass_thru || runparams.verbatim)
 533                 return false;
 534
 535         if (i + 1 < int(text_.size())) {
 536                 char_type next = text_[i + 1];
 537                 if (Encodings::isCombiningChar(next)) {
 538                         Encoding const & encoding = *(runparams.encoding);
 539                         // This space has an accent, so we must always output it.
 540                         column += latexSurrogatePair(os, ' ', next, encoding) - 1;
 541                         return true;
 542                 }
 543         }
 544
 545         if (lyxrc.plaintext_linelen > 0
 546             && column > lyxrc.plaintext_linelen
 547             && i
 548             && text_[i - 1] != ' '
 549             && (i + 1 < int(text_.size()))
 550             // same in FreeSpacing mode
 551             && !owner_->isFreeSpacing()
 552             // In typewriter mode, we want to avoid
 553             // ! . ? : at the end of a line
 554             && !(font.fontInfo().family() == TYPEWRITER_FAMILY
 555                  && (text_[i - 1] == '.'
 556                      || text_[i - 1] == '?'
 557                      || text_[i - 1] == ':'
 558                      || text_[i - 1] == '!'))) {
 559                 os << '\n';
 560                 texrow.newline();
 561                 texrow.start(owner_->id(), i + 1);
 562                 column = 0;
 563         } else if (style.free_spacing) {
 564                 os << '~';
 565         } else {
 566                 os << ' ';
 567         }
 568         return false;
 569 }
 570
 571
 572 int Paragraph::Private::writeScriptChars(odocstream & os,
 573                                          char_type c,
 574                                          docstring const & ltx,
 575                                          Change & runningChange,
 576                                          Encoding const & encoding,
 577                                          pos_type & i)
 578 {
 579         // We only arrive here when a proper language for character c has not
 580         // been specified (i.e., it could not be translated in the current
 581         // latex encoding) and it belongs to a known script.
 582         // Parameter ltx contains the latex translation of c as specified in
 583         // the unicodesymbols file and is something like "\textXXX{<spec>}".
 584         // The latex macro name "textXXX" specifies the script to which c
 585         // belongs and we use it in order to check whether characters from the
 586         // same script immediately follow, such that we can collect them in a
 587         // single "\textXXX" macro. So, we have to retain "\textXXX{<spec>"
 588         // for the first char but only "<spec>" for all subsequent chars.
 589         docstring::size_type const brace1 = ltx.find_first_of(from_ascii("{"));
 590         docstring::size_type const brace2 = ltx.find_last_of(from_ascii("}"));
 591         string script = to_ascii(ltx.substr(1, brace1 - 1));
 592         int length = ltx.substr(0, brace2).length();
 593         os << ltx.substr(0, brace2);
 594         int size = text_.size();
 595         while (i + 1 < size) {
 596                 char_type const next = text_[i + 1];
 597                 // Stop here if next character belongs to another script
 598                 // or there is a change in change tracking status.
 599                 if (!Encodings::isKnownScriptChar(next, script) ||
 600                     runningChange != owner_->lookupChange(i + 1))
 601                         break;
 602                 Font prev_font;
 603                 bool found = false;
 604                 FontList::const_iterator cit = fontlist_.begin();
 605                 FontList::const_iterator end = fontlist_.end();
 606                 for (; cit != end; ++cit) {
 607                         if (cit->pos() >= i && !found) {
 608                                 prev_font = cit->font();
 609                                 found = true;
 610                         }
 611                         if (cit->pos() >= i + 1)
 612                                 break;
 613                 }
 614                 // Stop here if there is a font attribute or encoding change.
 615                 if (found && cit != end && prev_font != cit->font())
 616                         break;
 617                 docstring const latex = encoding.latexChar(next);
 618                 docstring::size_type const b1 =
 619                                         latex.find_first_of(from_ascii("{"));
 620                 docstring::size_type const b2 =
 621                                         latex.find_last_of(from_ascii("}"));
 622                 int const len = b2 - b1 - 1;
 623                 os << latex.substr(b1 + 1, len);
 624                 length += len;
 625                 ++i;
 626         }
 627         os << '}';
 628         ++length;
 629         return length;
 630 }
 631
 632
 633 bool Paragraph::Private::isTextAt(string const & str, pos_type pos) const
 634 {
 635         pos_type const len = str.length();
 636
 637         // is the paragraph large enough?
 638         if (pos + len > int(text_.size()))
 639                 return false;
 640
 641         // does the wanted text start at point?
 642         for (string::size_type i = 0; i < str.length(); ++i) {
 643                 // Caution: direct comparison of characters works only
 644                 // because str is pure ASCII.
 645                 if (str[i] != text_[pos + i])
 646                         return false;
 647         }
 648
 649         return fontlist_.hasChangeInRange(pos, len);
 650 }
 651
 652
 653 void Paragraph::Private::latexInset(Buffer const & buf,
 654                                              BufferParams const & bparams,
 655                                              odocstream & os,
 656                                              TexRow & texrow,
 657                                              OutputParams & runparams,
 658                                              Font & running_font,
 659                                              Font & basefont,
 660                                              Font const & outerfont,
 661                                              bool & open_font,
 662                                              Change & running_change,
 663                                              Layout const & style,
 664                                              pos_type & i,
 665                                              unsigned int & column)
 666 {
 667         Inset * inset = owner_->getInset(i);
 668         BOOST_ASSERT(inset);
 669
 670         if (style.pass_thru) {
 671                 inset->plaintext(buf, os, runparams);
 672                 return;
 673         }
 674
 675         // FIXME: move this to InsetNewline::latex
 676         if (inset->lyxCode() == NEWLINE_CODE) {
 677                 // newlines are handled differently here than
 678                 // the default in simpleTeXSpecialChars().
 679                 if (!style.newline_allowed) {
 680                         os << '\n';
 681                 } else {
 682                         if (open_font) {
 683                                 column += running_font.latexWriteEndChanges(
 684                                         os, bparams, runparams,
 685                                         basefont, basefont);
 686                                 open_font = false;
 687                         }
 688
 689                         if (running_font.fontInfo().family() == TYPEWRITER_FAMILY)
 690                                 os << '~';
 691
 692                         basefont = owner_->getLayoutFont(bparams, outerfont);
 693                         running_font = basefont;
 694
 695                         if (runparams.moving_arg)
 696                                 os << "\\protect ";
 697
 698                         os << "\\\\\n";
 699                 }
 700                 texrow.newline();
 701                 texrow.start(owner_->id(), i + 1);
 702                 column = 0;
 703         }
 704
 705         if (owner_->lookupChange(i).type == Change::DELETED) {
 706                 if( ++runparams.inDeletedInset == 1)
 707                         runparams.changeOfDeletedInset = owner_->lookupChange(i);
 708         }
 709
 710         if (inset->canTrackChanges()) {
 711                 column += Changes::latexMarkChange(os, bparams, running_change,
 712                         Change(Change::UNCHANGED));
 713                 running_change = Change(Change::UNCHANGED);
 714         }
 715
 716         bool close = false;
 717         odocstream::pos_type const len = os.tellp();
 718
 719         if ((inset->lyxCode() == GRAPHICS_CODE
 720              || inset->lyxCode() == MATH_CODE
 721              || inset->lyxCode() == HYPERLINK_CODE)
 722             && running_font.isRightToLeft()) {
 723                 if (running_font.language()->lang() == "farsi")
 724                         os << "\\beginL{}";
 725                 else
 726                         os << "\\L{";
 727                 close = true;
 728         }
 729
 730         // FIXME: Bug: we can have an empty font change here!
 731         // if there has just been a font change, we are going to close it
 732         // right now, which means stupid latex code like \textsf{}. AFAIK,
 733         // this does not harm dvi output. A minor bug, thus (JMarc)
 734
 735         // Some insets cannot be inside a font change command.
 736         // However, even such insets *can* be placed in \L or \R
 737         // or their equivalents (for RTL language switches), so we don't
 738         // close the language in those cases.
 739         // ArabTeX, though, cannot handle this special behavior, it seems.
 740         bool arabtex = basefont.language()->lang() == "arabic_arabtex"
 741                 || running_font.language()->lang() == "arabic_arabtex";
 742         if (open_font && inset->noFontChange()) {
 743                 bool closeLanguage = arabtex
 744                         || basefont.isRightToLeft() == running_font.isRightToLeft();
 745                 unsigned int count = running_font.latexWriteEndChanges(os,
 746                         bparams, runparams, basefont, basefont, closeLanguage);
 747                 column += count;
 748                 // if any font properties were closed, update the running_font,
 749                 // making sure, however, to leave the language as it was
 750                 if (count > 0) {
 751                         // FIXME: probably a better way to keep track of the old
 752                         // language, than copying the entire font?
 753                         Font const copy_font(running_font);
 754                         basefont = owner_->getLayoutFont(bparams, outerfont);
 755                         running_font = basefont;
 756                         if (!closeLanguage)
 757                                 running_font.setLanguage(copy_font.language());
 758                         // leave font open if language is still open
 759                         open_font = (running_font.language() == basefont.language());
 760                         if (closeLanguage)
 761                                 runparams.local_font = &basefont;
 762                 }
 763         }
 764
 765         int tmp = inset->latex(buf, os, runparams);
 766
 767         if (close) {
 768         if (running_font.language()->lang() == "farsi")
 769                         os << "\\endL{}";
 770                 else
 771                         os << '}';
 772         }
 773
 774         if (tmp) {
 775                 for (int j = 0; j < tmp; ++j)
 776                         texrow.newline();
 777
 778                 texrow.start(owner_->id(), i + 1);
 779                 column = 0;
 780         } else {
 781                 column += os.tellp() - len;
 782         }
 783
 784         if (owner_->lookupChange(i).type == Change::DELETED)
 785                 --runparams.inDeletedInset;
 786 }
 787
 788
 789 void Paragraph::Private::latexSpecialChar(
 790                                              odocstream & os,
 791                                              OutputParams & runparams,
 792                                              Font & running_font,
 793                                              Change & running_change,
 794                                              Layout const & style,
 795                                              pos_type & i,
 796                                              unsigned int & column)
 797 {
 798         char_type const c = text_[i];
 799
 800         if (style.pass_thru) {
 801                 if (c != '\0')
 802                         // FIXME UNICODE: This can fail if c cannot
 803                         // be encoded in the current encoding.
 804                         os.put(c);
 805                 return;
 806         }
 807
 808         if (runparams.verbatim) {
 809                 os.put(c);
 810                 return;
 811         }
 812
 813         if (lyxrc.fontenc == "T1" && latexSpecialT1(c, os, i, column))
 814                 return;
 815
 816         if (running_font.fontInfo().family() == TYPEWRITER_FAMILY
 817                 && latexSpecialTypewriter(c, os, i, column))
 818                 return;
 819
 820         // Otherwise, we use what LaTeX provides us.
 821         switch (c) {
 822         case '\\':
 823                 os << "\\textbackslash{}";
 824                 column += 15;
 825                 break;
 826         case '<':
 827                 os << "\\textless{}";
 828                 column += 10;
 829                 break;
 830         case '>':
 831                 os << "\\textgreater{}";
 832                 column += 13;
 833                 break;
 834         case '|':
 835                 os << "\\textbar{}";
 836                 column += 9;
 837                 break;
 838         case '-':
 839                 os << '-';
 840                 break;
 841         case '\"':
 842                 os << "\\char`\\\"{}";
 843                 column += 9;
 844                 break;
 845
 846         case '$': case '&':
 847         case '%': case '#': case '{':
 848         case '}': case '_':
 849                 os << '\\';
 850                 os.put(c);
 851                 column += 1;
 852                 break;
 853
 854         case '~':
 855                 os << "\\textasciitilde{}";
 856                 column += 16;
 857                 break;
 858
 859         case '^':
 860                 os << "\\textasciicircum{}";
 861                 column += 17;
 862                 break;
 863
 864         case '*': case '[':
 865                 // avoid being mistaken for optional arguments
 866                 os << '{';
 867                 os.put(c);
 868                 os << '}';
 869                 column += 2;
 870                 break;
 871
 872         case ' ':
 873                 // Blanks are printed before font switching.
 874                 // Sure? I am not! (try nice-latex)
 875                 // I am sure it's correct. LyX might be smarter
 876                 // in the future, but for now, nothing wrong is
 877                 // written. (Asger)
 878                 break;
 879
 880         default:
 881
 882                 // LyX, LaTeX etc.
 883                 if (latexSpecialPhrase(os, i, column))
 884                         return;
 885
 886                 if (c == '\0')
 887                         return;
 888
 889                 Encoding const & encoding = *(runparams.encoding);
 890                 if (i + 1 < int(text_.size())) {
 891                         char_type next = text_[i + 1];
 892                         if (Encodings::isCombiningChar(next)) {
 893                                 column += latexSurrogatePair(os, c, next, encoding) - 1;
 894                                 ++i;
 895                                 break;
 896                         }
 897                 }
 898                 string script;
 899                 docstring const latex = encoding.latexChar(c);
 900                 if (Encodings::isKnownScriptChar(c, script)
 901                     && prefixIs(latex, from_ascii("\\" + script)))
 902                         column += writeScriptChars(os, c, latex,
 903                                         running_change, encoding, i) - 1;
 904                 else if (latex.length() > 1 && latex[latex.length() - 1] != '}') {
 905                         // Prevent eating of a following
 906                         // space or command corruption by
 907                         // following characters
 908                         column += latex.length() + 1;
 909                         os << latex << "{}";
 910                 } else {
 911                         column += latex.length() - 1;
 912                         os << latex;
 913                 }
 914                 break;
 915         }
 916 }
 917
 918
 919 bool Paragraph::Private::latexSpecialT1(char_type const c, odocstream & os,
 920         pos_type & i, unsigned int & column)
 921 {
 922         switch (c) {
 923         case '>':
 924         case '<':
 925                 os.put(c);
 926                 // In T1 encoding, these characters exist
 927                 // but we should avoid ligatures
 928                 if (i + 1 > int(text_.size()) || text_[i + 1] != c)
 929                         return true;
 930                 os << "\\,{}";
 931                 column += 3;
 932                 // Alternative code:
 933                 //os << "\\textcompwordmark{}";
 934                 //column += 19;
 935                 return true;
 936         case '|':
 937                 os.put(c);
 938                 return true;
 939         default:
 940                 return false;
 941         }
 942 }
 943
 944
 945 bool Paragraph::Private::latexSpecialTypewriter(char_type const c, odocstream & os,
 946         pos_type & i, unsigned int & column)
 947 {
 948         switch (c) {
 949         case '-':
 950                 if (i + 1 < int(text_.size()) && text_[i + 1] == '-') {
 951                         // "--" in Typewriter mode -> "-{}-"
 952                         os << "-{}";
 953                         column += 2;
 954                 } else
 955                         os << '-';
 956                 return true;
 957
 958         // I assume this is hack treating typewriter as verbatim
 959         // FIXME UNICODE: This can fail if c cannot be encoded
 960         // in the current encoding.
 961
 962         case '\0':
 963                 return true;
 964
 965         // Those characters are not directly supported.
 966         case '\\':
 967         case '\"':
 968         case '$': case '&':
 969         case '%': case '#': case '{':
 970         case '}': case '_':
 971         case '~':
 972         case '^':
 973         case '*': case '[':
 974         case ' ':
 975                 return false;
 976
 977         default:
 978                 // With Typewriter font, these characters exist.
 979                 os.put(c);
 980                 return true;
 981         }
 982 }
 983
 984
 985 bool Paragraph::Private::latexSpecialPhrase(odocstream & os, pos_type & i,
 986         unsigned int & column)
 987 {
 988         // FIXME: if we have "LaTeX" with a font
 989         // change in the middle (before the 'T', then
 990         // the "TeX" part is still special cased.
 991         // Really we should only operate this on
 992         // "words" for some definition of word
 993
 994         for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
 995                 if (!isTextAt(special_phrases[pnr].phrase, i))
 996                         continue;
 997                 os << special_phrases[pnr].macro;
 998                 i += special_phrases[pnr].phrase.length() - 1;
 999                 column += special_phrases[pnr].macro.length() - 1;
1000                 return true;
1001         }
1002         return false;
1003 }
1004
1005
1006 void Paragraph::Private::validate(LaTeXFeatures & features,
1007                                 Layout const & layout) const
1008 {
1009         // check the params.
1010         if (!params_.spacing().isDefault())
1011                 features.require("setspace");
1012
1013         // then the layouts
1014         features.useLayout(layout.name());
1015
1016         // then the fonts
1017         fontlist_.validate(features);
1018
1019         // then the indentation
1020         if (!params_.leftIndent().zero())
1021                 features.require("ParagraphLeftIndent");
1022
1023         // then the insets
1024         InsetList::const_iterator icit = insetlist_.begin();
1025         InsetList::const_iterator iend = insetlist_.end();
1026         for (; icit != iend; ++icit) {
1027                 if (icit->inset) {
1028                         icit->inset->validate(features);
1029                         if (layout.needprotect &&
1030                             icit->inset->lyxCode() == FOOT_CODE)
1031                                 features.require("NeedLyXFootnoteCode");
1032                 }
1033         }
1034
1035         // then the contents
1036         for (pos_type i = 0; i < int(text_.size()) ; ++i) {
1037                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
1038                         if (!special_phrases[pnr].builtin
1039                             && isTextAt(special_phrases[pnr].phrase, i)) {
1040                                 features.require(special_phrases[pnr].phrase);
1041                                 break;
1042                         }
1043                 }
1044                 Encodings::validate(text_[i], features);
1045         }
1046 }
1047
1048 /////////////////////////////////////////////////////////////////////
1049 //
1050 // Paragraph
1051 //
1052 /////////////////////////////////////////////////////////////////////
1053
1054 Paragraph::Paragraph()
1055         : d(new Paragraph::Private(this))
1056 {
1057         itemdepth = 0;
1058         d->params_.clear();
1059 }
1060
1061
1062 Paragraph::Paragraph(Paragraph const & par)
1063         : itemdepth(par.itemdepth),
1064         d(new Paragraph::Private(*par.d, this))
1065 {
1066 }
1067
1068
1069 Paragraph & Paragraph::operator=(Paragraph const & par)
1070 {
1071         // needed as we will destroy the private part before copying it
1072         if (&par != this) {
1073                 itemdepth = par.itemdepth;
1074
1075                 delete d;
1076                 d = new Private(*par.d, this);
1077         }
1078         return *this;
1079 }
1080
1081
1082 Paragraph::~Paragraph()
1083 {
1084         delete d;
1085 }
1086
1087
1088 void Paragraph::write(Buffer const & buf, ostream & os,
1089                           BufferParams const & bparams,
1090                           depth_type & dth) const
1091 {
1092         // The beginning or end of a deeper (i.e. nested) area?
1093         if (dth != params().depth()) {
1094                 if (params().depth() > dth) {
1095                         while (params().depth() > dth) {
1096                                 os << "\n\\begin_deeper";
1097                                 ++dth;
1098                         }
1099                 } else {
1100                         while (params().depth() < dth) {
1101                                 os << "\n\\end_deeper";
1102                                 --dth;
1103                         }
1104                 }
1105         }
1106
1107         // First write the layout
1108         os << "\n\\begin_layout " << to_utf8(layout()->name()) << '\n';
1109
1110         params().write(os);
1111
1112         Font font1(inherit_font, bparams.language);
1113
1114         Change running_change = Change(Change::UNCHANGED);
1115
1116         int column = 0;
1117         for (pos_type i = 0; i <= size(); ++i) {
1118
1119                 Change change = lookupChange(i);
1120                 Changes::lyxMarkChange(os, column, running_change, change);
1121                 running_change = change;
1122
1123                 if (i == size())
1124                         break;
1125
1126                 // Write font changes
1127                 Font font2 = getFontSettings(bparams, i);
1128                 if (font2 != font1) {
1129                         font2.lyxWriteChanges(font1, os);
1130                         column = 0;
1131                         font1 = font2;
1132                 }
1133
1134                 char_type const c = d->text_[i];
1135                 switch (c) {
1136                 case META_INSET:
1137                 {
1138                         Inset const * inset = getInset(i);
1139                         if (inset)
1140                                 if (inset->directWrite()) {
1141                                         // international char, let it write
1142                                         // code directly so it's shorter in
1143                                         // the file
1144                                         inset->write(buf, os);
1145                                 } else {
1146                                         if (i)
1147                                                 os << '\n';
1148                                         os << "\\begin_inset ";
1149                                         inset->write(buf, os);
1150                                         os << "\n\\end_inset\n\n";
1151                                         column = 0;
1152                                 }
1153                 }
1154                 break;
1155                 case '\\':
1156                         os << "\n\\backslash\n";
1157                         column = 0;
1158                         break;
1159                 case '.':
1160                         if (i + 1 < size() && d->text_[i + 1] == ' ') {
1161                                 os << ".\n";
1162                                 column = 0;
1163                         } else
1164                                 os << '.';
1165                         break;
1166                 default:
1167                         if ((column > 70 && c == ' ')
1168                             || column > 79) {
1169                                 os << '\n';
1170                                 column = 0;
1171                         }
1172                         // this check is to amend a bug. LyX sometimes
1173                         // inserts '\0' this could cause problems.
1174                         if (c != '\0') {
1175                                 std::vector<char> tmp = ucs4_to_utf8(c);
1176                                 tmp.push_back('\0');
1177                                 os << &tmp[0];
1178                         } else
1179                                 lyxerr << "ERROR (Paragraph::writeFile):"
1180                                         " NULL char in structure." << endl;
1181                         ++column;
1182                         break;
1183                 }
1184         }
1185
1186         os << "\n\\end_layout\n";
1187 }
1188
1189
1190 void Paragraph::validate(LaTeXFeatures & features) const
1191 {
1192         d->validate(features, *layout());
1193 }
1194
1195
1196 void Paragraph::insert(pos_type start, docstring const & str,
1197                        Font const & font, Change const & change)
1198 {
1199         for (size_t i = 0, n = str.size(); i != n ; ++i)
1200                 insertChar(start + i, str[i], font, change);
1201 }
1202
1203
1204 void Paragraph::appendChar(char_type c, Font const & font,
1205                 Change const & change)
1206 {
1207         // track change
1208         d->changes_.insert(change, d->text_.size());
1209         // when appending characters, no need to update tables
1210         d->text_.push_back(c);
1211         setFont(d->text_.size() - 1, font);
1212 }
1213
1214
1215 void Paragraph::appendString(docstring const & s, Font const & font,
1216                 Change const & change)
1217 {
1218         size_t end = s.size();
1219         size_t oldsize = d->text_.size();
1220         size_t newsize = oldsize + end;
1221         size_t capacity = d->text_.capacity();
1222         if (newsize >= capacity)
1223                 d->text_.reserve(std::max(capacity + 100, newsize));
1224
1225         // when appending characters, no need to update tables
1226         d->text_.append(s);
1227
1228         // FIXME: Optimize this!
1229         for (pos_type i = 0; i != end; ++i) {
1230                 // track change
1231                 d->changes_.insert(change, i);
1232         }
1233         d->fontlist_.setRange(oldsize, newsize, font);
1234 }
1235
1236
1237 void Paragraph::insertChar(pos_type pos, char_type c,
1238                            bool trackChanges)
1239 {
1240         d->insertChar(pos, c, Change(trackChanges ?
1241                            Change::INSERTED : Change::UNCHANGED));
1242 }
1243
1244
1245 void Paragraph::insertChar(pos_type pos, char_type c,
1246                            Font const & font, bool trackChanges)
1247 {
1248         d->insertChar(pos, c, Change(trackChanges ?
1249                            Change::INSERTED : Change::UNCHANGED));
1250         setFont(pos, font);
1251 }
1252
1253
1254 void Paragraph::insertChar(pos_type pos, char_type c,
1255                            Font const & font, Change const & change)
1256 {
1257         d->insertChar(pos, c, change);
1258         setFont(pos, font);
1259 }
1260
1261
1262 void Paragraph::insertInset(pos_type pos, Inset * inset,
1263                             Font const & font, Change const & change)
1264 {
1265         insertInset(pos, inset, change);
1266         // Set the font/language of the inset...
1267         setFont(pos, font);
1268 }
1269
1270
1271 bool Paragraph::insetAllowed(InsetCode code)
1272 {
1273         return !d->inset_owner_ || d->inset_owner_->insetAllowed(code);
1274 }
1275
1276
1277 void Paragraph::resetFonts(Font const & font)
1278 {
1279         d->fontlist_.setRange(0, d->text_.size(), font);
1280 }
1281
1282 // Gets uninstantiated font setting at position.
1283 Font const Paragraph::getFontSettings(BufferParams const & bparams,
1284                                          pos_type pos) const
1285 {
1286         if (pos > size()) {
1287                 lyxerr << " pos: " << pos << " size: " << size() << endl;
1288                 BOOST_ASSERT(pos <= size());
1289         }
1290
1291         FontList::const_iterator cit = d->fontlist_.fontIterator(pos);
1292         if (cit != d->fontlist_.end())
1293                 return cit->font();
1294
1295         if (pos == size() && !empty())
1296                 return getFontSettings(bparams, pos - 1);
1297
1298         return Font(inherit_font, getParLanguage(bparams));
1299 }
1300
1301
1302 FontSpan Paragraph::fontSpan(pos_type pos) const
1303 {
1304         BOOST_ASSERT(pos <= size());
1305         pos_type start = 0;
1306
1307         FontList::const_iterator cit = d->fontlist_.begin();
1308         FontList::const_iterator end = d->fontlist_.end();
1309         for (; cit != end; ++cit) {
1310                 if (cit->pos() >= pos) {
1311                         if (pos >= beginOfBody())
1312                                 return FontSpan(std::max(start, beginOfBody()),
1313                                                 cit->pos());
1314                         else
1315                                 return FontSpan(start,
1316                                                 std::min(beginOfBody() - 1,
1317                                                          cit->pos()));
1318                 }
1319                 start = cit->pos() + 1;
1320         }
1321
1322         // This should not happen, but if so, we take no chances.
1323         //lyxerr << "Paragraph::getEndPosOfFontSpan: This should not happen!"
1324         //      << endl;
1325         return FontSpan(pos, pos);
1326 }
1327
1328
1329 // Gets uninstantiated font setting at position 0
1330 Font const Paragraph::getFirstFontSettings(BufferParams const & bparams) const
1331 {
1332         if (!empty() && !d->fontlist_.empty())
1333                 return d->fontlist_.begin()->font();
1334
1335         return Font(inherit_font, bparams.language);
1336 }
1337
1338
1339 // Gets the fully instantiated font at a given position in a paragraph
1340 // This is basically the same function as Text::GetFont() in text2.cpp.
1341 // The difference is that this one is used for generating the LaTeX file,
1342 // and thus cosmetic "improvements" are disallowed: This has to deliver
1343 // the true picture of the buffer. (Asger)
1344 Font const Paragraph::getFont(BufferParams const & bparams, pos_type pos,
1345                                  Font const & outerfont) const
1346 {
1347         BOOST_ASSERT(pos >= 0);
1348
1349         Font font = getFontSettings(bparams, pos);
1350
1351         pos_type const body_pos = beginOfBody();
1352         if (pos < body_pos)
1353                 font.fontInfo().realize(d->layout_->labelfont);
1354         else
1355                 font.fontInfo().realize(d->layout_->font);
1356
1357         font.fontInfo().realize(outerfont.fontInfo());
1358         font.fontInfo().realize(bparams.getFont().fontInfo());
1359
1360         return font;
1361 }
1362
1363
1364 Font const Paragraph::getLabelFont
1365         (BufferParams const & bparams, Font const & outerfont) const
1366 {
1367         FontInfo tmpfont = layout()->labelfont;
1368         tmpfont.realize(outerfont.fontInfo());
1369         tmpfont.realize(bparams.getFont().fontInfo());
1370         return Font(tmpfont, getParLanguage(bparams));
1371 }
1372
1373
1374 Font const Paragraph::getLayoutFont
1375         (BufferParams const & bparams, Font const & outerfont) const
1376 {
1377         FontInfo tmpfont = layout()->font;
1378         tmpfont.realize(outerfont.fontInfo());
1379         tmpfont.realize(bparams.getFont().fontInfo());
1380         return Font(tmpfont, getParLanguage(bparams));
1381 }
1382
1383
1384 /// Returns the height of the highest font in range
1385 FontSize Paragraph::highestFontInRange
1386         (pos_type startpos, pos_type endpos, FontSize def_size) const
1387 {
1388         return d->fontlist_.highestInRange(startpos, endpos, def_size);
1389 }
1390
1391
1392 char_type
1393 Paragraph::getUChar(BufferParams const & bparams, pos_type pos) const
1394 {
1395         char_type c = d->text_[pos];
1396         if (!lyxrc.rtl_support)
1397                 return c;
1398
1399         char_type uc = c;
1400         switch (c) {
1401         case '(':
1402                 uc = ')';
1403                 break;
1404         case ')':
1405                 uc = '(';
1406                 break;
1407         case '[':
1408                 uc = ']';
1409                 break;
1410         case ']':
1411                 uc = '[';
1412                 break;
1413         case '{':
1414                 uc = '}';
1415                 break;
1416         case '}':
1417                 uc = '{';
1418                 break;
1419         case '<':
1420                 uc = '>';
1421                 break;
1422         case '>':
1423                 uc = '<';
1424                 break;
1425         }
1426         if (uc != c && getFontSettings(bparams, pos).isRightToLeft())
1427                 return uc;
1428         else
1429                 return c;
1430 }
1431
1432
1433 void Paragraph::setFont(pos_type pos, Font const & font)
1434 {
1435         BOOST_ASSERT(pos <= size());
1436
1437         // First, reduce font against layout/label font
1438         // Update: The setCharFont() routine in text2.cpp already
1439         // reduces font, so we don't need to do that here. (Asger)
1440
1441         d->fontlist_.set(pos, font);
1442 }
1443
1444
1445 void Paragraph::makeSameLayout(Paragraph const & par)
1446 {
1447         layout(par.layout());
1448         // move to pimpl?
1449         d->params_ = par.params();
1450 }
1451
1452
1453 bool Paragraph::stripLeadingSpaces(bool trackChanges)
1454 {
1455         if (isFreeSpacing())
1456                 return false;
1457
1458         int pos = 0;
1459         int count = 0;
1460
1461         while (pos < size() && (isNewline(pos) || isLineSeparator(pos))) {
1462                 if (eraseChar(pos, trackChanges))
1463                         ++count;
1464                 else
1465                         ++pos;
1466         }
1467
1468         return count > 0 || pos > 0;
1469 }
1470
1471
1472 bool Paragraph::hasSameLayout(Paragraph const & par) const
1473 {
1474         return par.layout() == layout() && d->params_.sameLayout(par.params());
1475 }
1476
1477
1478 depth_type Paragraph::getDepth() const
1479 {
1480         return params().depth();
1481 }
1482
1483
1484 depth_type Paragraph::getMaxDepthAfter() const
1485 {
1486         if (layout()->isEnvironment())
1487                 return params().depth() + 1;
1488         else
1489                 return params().depth();
1490 }
1491
1492
1493 char Paragraph::getAlign() const
1494 {
1495         if (params().align() == LYX_ALIGN_LAYOUT)
1496                 return layout()->align;
1497         else
1498                 return params().align();
1499 }
1500
1501
1502 docstring const & Paragraph::getLabelstring() const
1503 {
1504         return params().labelString();
1505 }
1506
1507
1508 // the next two functions are for the manual labels
1509 docstring const Paragraph::getLabelWidthString() const
1510 {
1511         if (layout()->margintype == MARGIN_MANUAL)
1512                 return params().labelWidthString();
1513         else
1514                 return _("Senseless with this layout!");
1515 }
1516
1517
1518 void Paragraph::setLabelWidthString(docstring const & s)
1519 {
1520         params().labelWidthString(s);
1521 }
1522
1523
1524 docstring const Paragraph::translateIfPossible(docstring const & s,
1525                 BufferParams const & bparams) const
1526 {
1527         if (!support::isAscii(s) || s.empty()) {
1528                 // This must be a user defined layout. We cannot translate
1529                 // this, since gettext accepts only ascii keys.
1530                 return s;
1531         }
1532         // Probably standard layout, try to translate
1533         Messages & m = getMessages(getParLanguage(bparams)->code());
1534         return m.get(to_ascii(s));
1535 }
1536
1537
1538 docstring Paragraph::expandLabel(LayoutPtr const & layout,
1539                 BufferParams const & bparams, bool process_appendix) const
1540 {
1541         TextClass const & tclass = bparams.getTextClass();
1542
1543         docstring fmt;
1544         if (process_appendix && params().appendix())
1545                 fmt = translateIfPossible(layout->labelstring_appendix(),
1546                         bparams);
1547         else
1548                 fmt = translateIfPossible(layout->labelstring(), bparams);
1549
1550         if (fmt.empty() && layout->labeltype == LABEL_COUNTER
1551             && !layout->counter.empty())
1552                 fmt = "\\the" + layout->counter;
1553
1554         // handle 'inherited level parts' in 'fmt',
1555         // i.e. the stuff between '@' in   '@Section@.\arabic{subsection}'
1556         size_t const i = fmt.find('@', 0);
1557         if (i != docstring::npos) {
1558                 size_t const j = fmt.find('@', i + 1);
1559                 if (j != docstring::npos) {
1560                         docstring parent(fmt, i + 1, j - i - 1);
1561                         docstring label = from_ascii("??");
1562                         if (tclass.hasLayout(parent))
1563                                 docstring label = expandLabel(tclass[parent], bparams,
1564                                                       process_appendix);
1565                         fmt = docstring(fmt, 0, i) + label
1566                                 + docstring(fmt, j + 1, docstring::npos);
1567                 }
1568         }
1569
1570         return tclass.counters().counterLabel(fmt);
1571 }
1572
1573
1574 void Paragraph::applyLayout(LayoutPtr const & new_layout)
1575 {
1576         layout(new_layout);
1577         LyXAlignment const oldAlign = params().align();
1578
1579         if (!(oldAlign & layout()->alignpossible)) {
1580                 frontend::Alert::warning(_("Alignment not permitted"),
1581                         _("The new layout does not permit the alignment previously used.\nSetting to default."));
1582                 params().align(LYX_ALIGN_LAYOUT);
1583         }
1584 }
1585
1586
1587 pos_type Paragraph::beginOfBody() const
1588 {
1589         return d->begin_of_body_;
1590 }
1591
1592
1593 void Paragraph::setBeginOfBody()
1594 {
1595         if (layout()->labeltype != LABEL_MANUAL) {
1596                 d->begin_of_body_ = 0;
1597                 return;
1598         }
1599
1600         // Unroll the first two cycles of the loop
1601         // and remember the previous character to
1602         // remove unnecessary getChar() calls
1603         pos_type i = 0;
1604         pos_type end = size();
1605         if (i < end && !isNewline(i)) {
1606                 ++i;
1607                 char_type previous_char = 0;
1608                 char_type temp = 0;
1609                 if (i < end) {
1610                         previous_char = d->text_[i];
1611                         if (!isNewline(i)) {
1612                                 ++i;
1613                                 while (i < end && previous_char != ' ') {
1614                                         temp = d->text_[i];
1615                                         if (isNewline(i))
1616                                                 break;
1617                                         ++i;
1618                                         previous_char = temp;
1619                                 }
1620                         }
1621                 }
1622         }
1623
1624         d->begin_of_body_ = i;
1625 }
1626
1627
1628 bool Paragraph::forceDefaultParagraphs() const
1629 {
1630         return inInset() && inInset()->forceDefaultParagraphs(0);
1631 }
1632
1633
1634 namespace {
1635
1636 // paragraphs inside floats need different alignment tags to avoid
1637 // unwanted space
1638
1639 bool noTrivlistCentering(InsetCode code)
1640 {
1641         return code == FLOAT_CODE || code == WRAP_CODE;
1642 }
1643
1644
1645 string correction(string const & orig)
1646 {
1647         if (orig == "flushleft")
1648                 return "raggedright";
1649         if (orig == "flushright")
1650                 return "raggedleft";
1651         if (orig == "center")
1652                 return "centering";
1653         return orig;
1654 }
1655
1656
1657 string const corrected_env(string const & suffix, string const & env,
1658         InsetCode code)
1659 {
1660         string output = suffix + "{";
1661         if (noTrivlistCentering(code))
1662                 output += correction(env);
1663         else
1664                 output += env;
1665         output += "}";
1666         if (suffix == "\\begin")
1667                 output += "\n";
1668         return output;
1669 }
1670
1671
1672 void adjust_row_column(string const & str, TexRow & texrow, int & column)
1673 {
1674         if (!contains(str, "\n"))
1675                 column += str.size();
1676         else {
1677                 string tmp;
1678                 texrow.newline();
1679                 column = rsplit(str, tmp, '\n').size();
1680         }
1681 }
1682
1683 } // namespace anon
1684
1685
1686 int Paragraph::Private::startTeXParParams(BufferParams const & bparams,
1687                                  odocstream & os, TexRow & texrow,
1688                                  bool moving_arg) const
1689 {
1690         int column = 0;
1691
1692         if (params_.noindent()) {
1693                 os << "\\noindent ";
1694                 column += 10;
1695         }
1696
1697         LyXAlignment const curAlign = params_.align();
1698
1699         if (curAlign == layout_->align)
1700                 return column;
1701
1702         switch (curAlign) {
1703         case LYX_ALIGN_NONE:
1704         case LYX_ALIGN_BLOCK:
1705         case LYX_ALIGN_LAYOUT:
1706         case LYX_ALIGN_SPECIAL:
1707                 break;
1708         case LYX_ALIGN_LEFT:
1709         case LYX_ALIGN_RIGHT:
1710         case LYX_ALIGN_CENTER:
1711                 if (moving_arg) {
1712                         os << "\\protect";
1713                         column += 8;
1714                 }
1715                 break;
1716         }
1717
1718         switch (curAlign) {
1719         case LYX_ALIGN_NONE:
1720         case LYX_ALIGN_BLOCK:
1721         case LYX_ALIGN_LAYOUT:
1722         case LYX_ALIGN_SPECIAL:
1723                 break;
1724         case LYX_ALIGN_LEFT: {
1725                 string output;
1726                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
1727                         output = corrected_env("\\begin", "flushleft", owner_->ownerCode());
1728                 else
1729                         output = corrected_env("\\begin", "flushright", owner_->ownerCode());
1730                 os << from_ascii(output);
1731                 adjust_row_column(output, texrow, column);
1732                 break;
1733         } case LYX_ALIGN_RIGHT: {
1734                 string output;
1735                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
1736                         output = corrected_env("\\begin", "flushright", owner_->ownerCode());
1737                 else
1738                         output = corrected_env("\\begin", "flushleft", owner_->ownerCode());
1739                 os << from_ascii(output);
1740                 adjust_row_column(output, texrow, column);
1741                 break;
1742         } case LYX_ALIGN_CENTER: {
1743                 string output;
1744                 output = corrected_env("\\begin", "center", owner_->ownerCode());
1745                 os << from_ascii(output);
1746                 adjust_row_column(output, texrow, column);
1747                 break;
1748         }
1749         }
1750
1751         return column;
1752 }
1753
1754
1755 int Paragraph::Private::endTeXParParams(BufferParams const & bparams,
1756                                odocstream & os, TexRow & texrow,
1757                                bool moving_arg) const
1758 {
1759         int column = 0;
1760
1761         switch (params_.align()) {
1762         case LYX_ALIGN_NONE:
1763         case LYX_ALIGN_BLOCK:
1764         case LYX_ALIGN_LAYOUT:
1765         case LYX_ALIGN_SPECIAL:
1766                 break;
1767         case LYX_ALIGN_LEFT:
1768         case LYX_ALIGN_RIGHT:
1769         case LYX_ALIGN_CENTER:
1770                 if (moving_arg) {
1771                         os << "\\protect";
1772                         column = 8;
1773                 }
1774                 break;
1775         }
1776
1777         switch (params_.align()) {
1778         case LYX_ALIGN_NONE:
1779         case LYX_ALIGN_BLOCK:
1780         case LYX_ALIGN_LAYOUT:
1781         case LYX_ALIGN_SPECIAL:
1782                 break;
1783         case LYX_ALIGN_LEFT: {
1784                 string output;
1785                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
1786                         output = corrected_env("\n\\par\\end", "flushleft", owner_->ownerCode());
1787                 else
1788                         output = corrected_env("\n\\par\\end", "flushright", owner_->ownerCode());
1789                 os << from_ascii(output);
1790                 adjust_row_column(output, texrow, column);
1791                 break;
1792         } case LYX_ALIGN_RIGHT: {
1793                 string output;
1794                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
1795                         output = corrected_env("\n\\par\\end", "flushright", owner_->ownerCode());
1796                 else
1797                         output = corrected_env("\n\\par\\end", "flushleft", owner_->ownerCode());
1798                 os << from_ascii(output);
1799                 adjust_row_column(output, texrow, column);
1800                 break;
1801         } case LYX_ALIGN_CENTER: {
1802                 string output;
1803                 output = corrected_env("\n\\par\\end", "center", owner_->ownerCode());
1804                 os << from_ascii(output);
1805                 adjust_row_column(output, texrow, column);
1806                 break;
1807         }
1808         }
1809
1810         return column;
1811 }
1812
1813
1814 // This one spits out the text of the paragraph
1815 bool Paragraph::latex(Buffer const & buf,
1816                                 BufferParams const & bparams,
1817                                 Font const & outerfont,
1818                                 odocstream & os, TexRow & texrow,
1819                                 OutputParams const & runparams) const
1820 {
1821         LYXERR(Debug::LATEX) << "SimpleTeXOnePar...     " << this << endl;
1822
1823         bool return_value = false;
1824
1825         LayoutPtr style;
1826
1827         // well we have to check if we are in an inset with unlimited
1828         // length (all in one row) if that is true then we don't allow
1829         // any special options in the paragraph and also we don't allow
1830         // any environment other than the default layout of the text class
1831         // to be valid!
1832         bool asdefault = forceDefaultParagraphs();
1833
1834         if (asdefault) {
1835                 style = bparams.getTextClass().defaultLayout();
1836         } else {
1837                 style = layout();
1838         }
1839
1840         // Current base font for all inherited font changes, without any
1841         // change caused by an individual character, except for the language:
1842         // It is set to the language of the first character.
1843         // As long as we are in the label, this font is the base font of the
1844         // label. Before the first body character it is set to the base font
1845         // of the body.
1846         Font basefont;
1847
1848         // Maybe we have to create a optional argument.
1849         pos_type body_pos = beginOfBody();
1850         unsigned int column = 0;
1851
1852         if (body_pos > 0) {
1853                 // the optional argument is kept in curly brackets in
1854                 // case it contains a ']'
1855                 os << "[{";
1856                 column += 2;
1857                 basefont = getLabelFont(bparams, outerfont);
1858         } else {
1859                 basefont = getLayoutFont(bparams, outerfont);
1860         }
1861
1862         // Which font is currently active?
1863         Font running_font(basefont);
1864         // Do we have an open font change?
1865         bool open_font = false;
1866
1867         Change runningChange = Change(Change::UNCHANGED);
1868
1869         texrow.start(id(), 0);
1870
1871         // if the paragraph is empty, the loop will not be entered at all
1872         if (empty()) {
1873                 if (style->isCommand()) {
1874                         os << '{';
1875                         ++column;
1876                 }
1877                 if (!asdefault)
1878                         column += d->startTeXParParams(bparams, os, texrow,
1879                                                     runparams.moving_arg);
1880         }
1881
1882         for (pos_type i = 0; i < size(); ++i) {
1883                 // First char in paragraph or after label?
1884                 if (i == body_pos) {
1885                         if (body_pos > 0) {
1886                                 if (open_font) {
1887                                         column += running_font.latexWriteEndChanges(
1888                                                 os, bparams, runparams,
1889                                                 basefont, basefont);
1890                                         open_font = false;
1891                                 }
1892                                 basefont = getLayoutFont(bparams, outerfont);
1893                                 running_font = basefont;
1894
1895                                 column += Changes::latexMarkChange(os, bparams,
1896                                                 runningChange, Change(Change::UNCHANGED));
1897                                 runningChange = Change(Change::UNCHANGED);
1898
1899                                 os << "}] ";
1900                                 column +=3;
1901                         }
1902                         if (style->isCommand()) {
1903                                 os << '{';
1904                                 ++column;
1905                         }
1906
1907                         if (!asdefault)
1908                                 column += d->startTeXParParams(bparams, os,
1909                                                             texrow,
1910                                                             runparams.moving_arg);
1911                 }
1912
1913                 Change const & change = runparams.inDeletedInset ? runparams.changeOfDeletedInset
1914                                                                  : lookupChange(i);
1915
1916                 if (bparams.outputChanges && runningChange != change) {
1917                         if (open_font) {
1918                                 column += running_font.latexWriteEndChanges(
1919                                                 os, bparams, runparams, basefont, basefont);
1920                                 open_font = false;
1921                         }
1922                         basefont = getLayoutFont(bparams, outerfont);
1923                         running_font = basefont;
1924
1925                         column += Changes::latexMarkChange(os, bparams, runningChange, change);
1926                         runningChange = change;
1927                 }
1928
1929                 // do not output text which is marked deleted
1930                 // if change tracking output is disabled
1931                 if (!bparams.outputChanges && change.type == Change::DELETED) {
1932                         continue;
1933                 }
1934
1935                 ++column;
1936
1937                 // Fully instantiated font
1938                 Font const font = getFont(bparams, i, outerfont);
1939
1940                 Font const last_font = running_font;
1941
1942                 // Do we need to close the previous font?
1943                 if (open_font &&
1944                     (font != running_font ||
1945                      font.language() != running_font.language()))
1946                 {
1947                         column += running_font.latexWriteEndChanges(
1948                                         os, bparams, runparams, basefont,
1949                                         (i == body_pos-1) ? basefont : font);
1950                         running_font = basefont;
1951                         open_font = false;
1952                 }
1953
1954                 // Switch file encoding if necessary (and allowed)
1955                 if (!runparams.verbatim &&
1956                     runparams.encoding->package() == Encoding::inputenc &&
1957                     font.language()->encoding()->package() == Encoding::inputenc) {
1958                         std::pair<bool, int> const enc_switch = switchEncoding(os, bparams,
1959                                         runparams.moving_arg, *(runparams.encoding),
1960                                         *(font.language()->encoding()));
1961                         if (enc_switch.first) {
1962                                 column += enc_switch.second;
1963                                 runparams.encoding = font.language()->encoding();
1964                         }
1965                 }
1966
1967                 char_type const c = d->text_[i];
1968
1969                 // Do we need to change font?
1970                 if ((font != running_font ||
1971                      font.language() != running_font.language()) &&
1972                         i != body_pos - 1)
1973                 {
1974                         odocstringstream ods;
1975                         column += font.latexWriteStartChanges(ods, bparams,
1976                                                               runparams, basefont,
1977                                                               last_font);
1978                         running_font = font;
1979                         open_font = true;
1980                         docstring fontchange = ods.str();
1981                         // check if the fontchange ends with a trailing blank
1982                         // (like "\small " (see bug 3382)
1983                         if (suffixIs(fontchange, ' ') && c == ' ')
1984                                 os << fontchange.substr(0, fontchange.size() - 1)
1985                                    << from_ascii("{}");
1986                         else
1987                                 os << fontchange;
1988                 }
1989
1990                 if (c == ' ') {
1991                         // FIXME: integrate this case in latexSpecialChar
1992                         // Do not print the separation of the optional argument
1993                         // if style->pass_thru is false. This works because
1994                         // latexSpecialChar ignores spaces if
1995                         // style->pass_thru is false.
1996                         if (i != body_pos - 1) {
1997                                 if (d->simpleTeXBlanks(
1998                                                 runparams, os, texrow,
1999                                                 i, column, font, *style)) {
2000                                         // A surrogate pair was output. We
2001                                         // must not call latexSpecialChar
2002                                         // in this iteration, since it would output
2003                                         // the combining character again.
2004                                         ++i;
2005                                         continue;
2006                                 }
2007                         }
2008                 }
2009
2010                 OutputParams rp = runparams;
2011                 rp.free_spacing = style->free_spacing;
2012                 rp.local_font = &font;
2013                 rp.intitle = style->intitle;
2014
2015                 // Two major modes:  LaTeX or plain
2016                 // Handle here those cases common to both modes
2017                 // and then split to handle the two modes separately.
2018                 if (c == META_INSET)
2019                         d->latexInset(buf, bparams, os,
2020                                         texrow, rp, running_font,
2021                                         basefont, outerfont, open_font,
2022                                         runningChange, *style, i, column);
2023                 else
2024                         d->latexSpecialChar(os, rp, running_font, runningChange,
2025                                 *style, i, column);
2026
2027                 // Set the encoding to that returned from simpleTeXSpecialChars (see
2028                 // comment for encoding member in OutputParams.h)
2029                 runparams.encoding = rp.encoding;
2030         }
2031
2032         // If we have an open font definition, we have to close it
2033         if (open_font) {
2034 #ifdef FIXED_LANGUAGE_END_DETECTION
2035                 if (next_) {
2036                         running_font
2037                                 .latexWriteEndChanges(os, bparams, runparams,
2038                                         basefont,
2039                                         next_->getFont(bparams, 0, outerfont));
2040                 } else {
2041                         running_font.latexWriteEndChanges(os, bparams,
2042                                         runparams, basefont, basefont);
2043                 }
2044 #else
2045 //FIXME: For now we ALWAYS have to close the foreign font settings if they are
2046 //FIXME: there as we start another \selectlanguage with the next paragraph if
2047 //FIXME: we are in need of this. This should be fixed sometime (Jug)
2048                 running_font.latexWriteEndChanges(os, bparams, runparams,
2049                                 basefont, basefont);
2050 #endif
2051         }
2052
2053         column += Changes::latexMarkChange(os, bparams, runningChange, Change(Change::UNCHANGED));
2054
2055         // Needed if there is an optional argument but no contents.
2056         if (body_pos > 0 && body_pos == size()) {
2057                 os << "}]~";
2058                 return_value = false;
2059         }
2060
2061         if (!asdefault) {
2062                 column += d->endTeXParParams(bparams, os, texrow,
2063                                           runparams.moving_arg);
2064         }
2065
2066         LYXERR(Debug::LATEX) << "SimpleTeXOnePar...done " << this << endl;
2067         return return_value;
2068 }
2069
2070
2071 bool Paragraph::emptyTag() const
2072 {
2073         for (pos_type i = 0; i < size(); ++i) {
2074                 if (isInset(i)) {
2075                         Inset const * inset = getInset(i);
2076                         InsetCode lyx_code = inset->lyxCode();
2077                         if (lyx_code != TOC_CODE &&
2078                             lyx_code != INCLUDE_CODE &&
2079                             lyx_code != GRAPHICS_CODE &&
2080                             lyx_code != ERT_CODE &&
2081                             lyx_code != LISTINGS_CODE &&
2082                             lyx_code != FLOAT_CODE &&
2083                             lyx_code != TABULAR_CODE) {
2084                                 return false;
2085                         }
2086                 } else {
2087                         char_type c = d->text_[i];
2088                         if (c != ' ' && c != '\t')
2089                                 return false;
2090                 }
2091         }
2092         return true;
2093 }
2094
2095
2096 string Paragraph::getID(Buffer const & buf, OutputParams const & runparams) const
2097 {
2098         for (pos_type i = 0; i < size(); ++i) {
2099                 if (isInset(i)) {
2100                         Inset const * inset = getInset(i);
2101                         InsetCode lyx_code = inset->lyxCode();
2102                         if (lyx_code == LABEL_CODE) {
2103                                 InsetLabel const * const il = static_cast<InsetLabel const *>(inset);
2104                                 docstring const & id = il->getParam("name");
2105                                 return "id='" + to_utf8(sgml::cleanID(buf, runparams, id)) + "'";
2106                         }
2107                 }
2108
2109         }
2110         return string();
2111 }
2112
2113
2114 pos_type Paragraph::getFirstWord(Buffer const & buf, odocstream & os, OutputParams const & runparams) const
2115 {
2116         pos_type i;
2117         for (i = 0; i < size(); ++i) {
2118                 if (isInset(i)) {
2119                         Inset const * inset = getInset(i);
2120                         inset->docbook(buf, os, runparams);
2121                 } else {
2122                         char_type c = d->text_[i];
2123                         if (c == ' ')
2124                                 break;
2125                         os << sgml::escapeChar(c);
2126                 }
2127         }
2128         return i;
2129 }
2130
2131
2132 bool Paragraph::Private::onlyText(Buffer const & buf, Font const & outerfont, pos_type initial) const
2133 {
2134         Font font_old;
2135         pos_type size = text_.size();
2136         for (pos_type i = initial; i < size; ++i) {
2137                 Font font = owner_->getFont(buf.params(), i, outerfont);
2138                 if (text_[i] == META_INSET)
2139                         return false;
2140                 if (i != initial && font != font_old)
2141                         return false;
2142                 font_old = font;
2143         }
2144
2145         return true;
2146 }
2147
2148
2149 void Paragraph::simpleDocBookOnePar(Buffer const & buf,
2150                                     odocstream & os,
2151                                     OutputParams const & runparams,
2152                                     Font const & outerfont,
2153                                     pos_type initial) const
2154 {
2155         bool emph_flag = false;
2156
2157         LayoutPtr const & style = layout();
2158         FontInfo font_old =
2159                 style->labeltype == LABEL_MANUAL ? style->labelfont : style->font;
2160
2161         if (style->pass_thru && !d->onlyText(buf, outerfont, initial))
2162                 os << "]]>";
2163
2164         // parsing main loop
2165         for (pos_type i = initial; i < size(); ++i) {
2166                 Font font = getFont(buf.params(), i, outerfont);
2167
2168                 // handle <emphasis> tag
2169                 if (font_old.emph() != font.fontInfo().emph()) {
2170                         if (font.fontInfo().emph() == FONT_ON) {
2171                                 os << "<emphasis>";
2172                                 emph_flag = true;
2173                         } else if (i != initial) {
2174                                 os << "</emphasis>";
2175                                 emph_flag = false;
2176                         }
2177                 }
2178
2179                 if (isInset(i)) {
2180                         Inset const * inset = getInset(i);
2181                         inset->docbook(buf, os, runparams);
2182                 } else {
2183                         char_type c = d->text_[i];
2184
2185                         if (style->pass_thru)
2186                                 os.put(c);
2187                         else
2188                                 os << sgml::escapeChar(c);
2189                 }
2190                 font_old = font.fontInfo();
2191         }
2192
2193         if (emph_flag) {
2194                 os << "</emphasis>";
2195         }
2196
2197         if (style->free_spacing)
2198                 os << '\n';
2199         if (style->pass_thru && !d->onlyText(buf, outerfont, initial))
2200                 os << "<![CDATA[";
2201 }
2202
2203
2204 bool Paragraph::isHfill(pos_type pos) const
2205 {
2206         return isInset(pos)
2207                 && getInset(pos)->lyxCode() == HFILL_CODE;
2208 }
2209
2210
2211 bool Paragraph::isNewline(pos_type pos) const
2212 {
2213         return isInset(pos)
2214                 && getInset(pos)->lyxCode() == NEWLINE_CODE;
2215 }
2216
2217
2218 bool Paragraph::isLineSeparator(pos_type pos) const
2219 {
2220         char_type const c = d->text_[pos];
2221         return isLineSeparatorChar(c)
2222                 || (c == META_INSET && getInset(pos) &&
2223                 getInset(pos)->isLineSeparator());
2224 }
2225
2226
2227 /// Used by the spellchecker
2228 bool Paragraph::isLetter(pos_type pos) const
2229 {
2230         if (isInset(pos))
2231                 return getInset(pos)->isLetter();
2232         else {
2233                 char_type const c = d->text_[pos];
2234                 return isLetterChar(c) || isDigit(c);
2235         }
2236 }
2237
2238
2239 Language const *
2240 Paragraph::getParLanguage(BufferParams const & bparams) const
2241 {
2242         if (!empty())
2243                 return getFirstFontSettings(bparams).language();
2244         // FIXME: we should check the prev par as well (Lgb)
2245         return bparams.language;
2246 }
2247
2248
2249 bool Paragraph::isRTL(BufferParams const & bparams) const
2250 {
2251         return lyxrc.rtl_support
2252                 && getParLanguage(bparams)->rightToLeft()
2253                 && ownerCode() != ERT_CODE
2254                 && ownerCode() != LISTINGS_CODE;
2255 }
2256
2257
2258 void Paragraph::changeLanguage(BufferParams const & bparams,
2259                                Language const * from, Language const * to)
2260 {
2261         // change language including dummy font change at the end
2262         for (pos_type i = 0; i <= size(); ++i) {
2263                 Font font = getFontSettings(bparams, i);
2264                 if (font.language() == from) {
2265                         font.setLanguage(to);
2266                         setFont(i, font);
2267                 }
2268         }
2269 }
2270
2271
2272 bool Paragraph::isMultiLingual(BufferParams const & bparams) const
2273 {
2274         Language const * doc_language = bparams.language;
2275         FontList::const_iterator cit = d->fontlist_.begin();
2276         FontList::const_iterator end = d->fontlist_.end();
2277
2278         for (; cit != end; ++cit)
2279                 if (cit->font().language() != ignore_language &&
2280                     cit->font().language() != latex_language &&
2281                     cit->font().language() != doc_language)
2282                         return true;
2283         return false;
2284 }
2285
2286
2287 // Convert the paragraph to a string.
2288 // Used for building the table of contents
2289 docstring const Paragraph::asString(Buffer const & buffer, bool label) const
2290 {
2291         return asString(buffer, 0, size(), label);
2292 }
2293
2294
2295 docstring const Paragraph::asString(Buffer const & buffer,
2296                                  pos_type beg, pos_type end, bool label) const
2297 {
2298
2299         odocstringstream os;
2300
2301         if (beg == 0 && label && !params().labelString().empty())
2302                 os << params().labelString() << ' ';
2303
2304         for (pos_type i = beg; i < end; ++i) {
2305                 char_type const c = d->text_[i];
2306                 if (isPrintable(c))
2307                         os.put(c);
2308                 else if (c == META_INSET)
2309                         getInset(i)->textString(buffer, os);
2310         }
2311
2312         return os.str();
2313 }
2314
2315
2316 void Paragraph::setInsetOwner(Inset * inset)
2317 {
2318         d->inset_owner_ = inset;
2319 }
2320
2321
2322 int Paragraph::id() const
2323 {
2324         return d->id_;
2325 }
2326
2327
2328 LayoutPtr const & Paragraph::layout() const
2329 {
2330         return d->layout_;
2331 }
2332
2333
2334 void Paragraph::layout(LayoutPtr const & new_layout)
2335 {
2336         d->layout_ = new_layout;
2337 }
2338
2339
2340 Inset * Paragraph::inInset() const
2341 {
2342         return d->inset_owner_;
2343 }
2344
2345
2346 InsetCode Paragraph::ownerCode() const
2347 {
2348         return d->inset_owner_ ?
2349                 d->inset_owner_->lyxCode() : NO_CODE;
2350 }
2351
2352
2353 ParagraphParameters & Paragraph::params()
2354 {
2355         return d->params_;
2356 }
2357
2358
2359 ParagraphParameters const & Paragraph::params() const
2360 {
2361         return d->params_;
2362 }
2363
2364
2365 bool Paragraph::isFreeSpacing() const
2366 {
2367         if (layout()->free_spacing)
2368                 return true;
2369         return d->inset_owner_ && d->inset_owner_->isFreeSpacing();
2370 }
2371
2372
2373 bool Paragraph::allowEmpty() const
2374 {
2375         if (layout()->keepempty)
2376                 return true;
2377         return d->inset_owner_ && d->inset_owner_->allowEmpty();
2378 }
2379
2380
2381 char_type Paragraph::transformChar(char_type c, pos_type pos) const
2382 {
2383         if (!Encodings::is_arabic(c))
2384                 return c;
2385
2386         char_type prev_char = ' ';
2387         char_type next_char = ' ';
2388
2389         for (pos_type i = pos - 1; i >= 0; --i) {
2390                 char_type const par_char = d->text_[i];
2391                 if (!Encodings::isComposeChar_arabic(par_char)) {
2392                         prev_char = par_char;
2393                         break;
2394                 }
2395         }
2396
2397         for (pos_type i = pos + 1, end = size(); i < end; ++i) {
2398                 char_type const par_char = d->text_[i];
2399                 if (!Encodings::isComposeChar_arabic(par_char)) {
2400                         next_char = par_char;
2401                         break;
2402                 }
2403         }
2404
2405         if (Encodings::is_arabic(next_char)) {
2406                 if (Encodings::is_arabic(prev_char) &&
2407                         !Encodings::is_arabic_special(prev_char))
2408                         return Encodings::transformChar(c, Encodings::FORM_MEDIAL);
2409                 else
2410                         return Encodings::transformChar(c, Encodings::FORM_INITIAL);
2411         } else {
2412                 if (Encodings::is_arabic(prev_char) &&
2413                         !Encodings::is_arabic_special(prev_char))
2414                         return Encodings::transformChar(c, Encodings::FORM_FINAL);
2415                 else
2416                         return Encodings::transformChar(c, Encodings::FORM_ISOLATED);
2417         }
2418 }
2419
2420
2421 int Paragraph::checkBiblio(bool track_changes)
2422 {
2423         //FIXME From JS:
2424         //This is getting more and more a mess. ...We really should clean
2425         //up this bibitem issue for 1.6. See also bug 2743.
2426
2427         // Add bibitem insets if necessary
2428         if (layout()->labeltype != LABEL_BIBLIO)
2429                 return 0;
2430
2431         bool hasbibitem = !d->insetlist_.empty()
2432                 // Insist on it being in pos 0
2433                 && d->text_[0] == META_INSET
2434                 && d->insetlist_.begin()->inset->lyxCode() == BIBITEM_CODE;
2435
2436         docstring oldkey;
2437         docstring oldlabel;
2438
2439         // remove a bibitem in pos != 0
2440         // restore it later in pos 0 if necessary
2441         // (e.g. if a user inserts contents _before_ the item)
2442         // we're assuming there's only one of these, which there
2443         // should be.
2444         int erasedInsetPosition = -1;
2445         InsetList::iterator it = d->insetlist_.begin();
2446         InsetList::iterator end = d->insetlist_.end();
2447         for (; it != end; ++it)
2448                 if (it->inset->lyxCode() == BIBITEM_CODE
2449                     && it->pos > 0) {
2450                         InsetBibitem * olditem = static_cast<InsetBibitem *>(it->inset);
2451                         oldkey = olditem->getParam("key");
2452                         oldlabel = olditem->getParam("label");
2453                         erasedInsetPosition = it->pos;
2454                         eraseChar(erasedInsetPosition, track_changes);
2455                         break;
2456         }
2457
2458         //There was an InsetBibitem at the beginning, and we didn't
2459         //have to erase one.
2460         if (hasbibitem && erasedInsetPosition < 0)
2461                         return 0;
2462
2463         //There was an InsetBibitem at the beginning and we did have to
2464         //erase one. So we give its properties to the beginning inset.
2465         if (hasbibitem) {
2466                 InsetBibitem * inset =
2467                         static_cast<InsetBibitem *>(d->insetlist_.begin()->inset);
2468                 if (!oldkey.empty())
2469                         inset->setParam("key", oldkey);
2470                 inset->setParam("label", oldlabel);
2471                 return -erasedInsetPosition;
2472         }
2473
2474         //There was no inset at the beginning, so we need to create one with
2475         //the key and label of the one we erased.
2476         InsetBibitem * inset(new InsetBibitem(InsetCommandParams(BIBITEM_CODE)));
2477         // restore values of previously deleted item in this par.
2478         if (!oldkey.empty())
2479                 inset->setParam("key", oldkey);
2480         inset->setParam("label", oldlabel);
2481         insertInset(0, static_cast<Inset *>(inset),
2482                     Change(track_changes ? Change::INSERTED : Change::UNCHANGED));
2483
2484         return 1;
2485 }
2486
2487
2488 void Paragraph::checkAuthors(AuthorList const & authorList)
2489 {
2490         d->changes_.checkAuthors(authorList);
2491 }
2492
2493
2494 bool Paragraph::isUnchanged(pos_type pos) const
2495 {
2496         return lookupChange(pos).type == Change::UNCHANGED;
2497 }
2498
2499
2500 bool Paragraph::isInserted(pos_type pos) const
2501 {
2502         return lookupChange(pos).type == Change::INSERTED;
2503 }
2504
2505
2506 bool Paragraph::isDeleted(pos_type pos) const
2507 {
2508         return lookupChange(pos).type == Change::DELETED;
2509 }
2510
2511
2512 InsetList const & Paragraph::insetList() const
2513 {
2514         return d->insetlist_;
2515 }
2516
2517
2518 Inset * Paragraph::releaseInset(pos_type pos)
2519 {
2520         Inset * inset = d->insetlist_.release(pos);
2521         /// does not honour change tracking!
2522         eraseChar(pos, false);
2523         return inset;
2524 }
2525
2526
2527 Inset * Paragraph::getInset(pos_type pos)
2528 {
2529         return d->insetlist_.get(pos);
2530 }
2531
2532
2533 Inset const * Paragraph::getInset(pos_type pos) const
2534 {
2535         return d->insetlist_.get(pos);
2536 }
2537
2538
2539 void Paragraph::changeCase(BufferParams const & bparams, pos_type pos,
2540                 pos_type right, TextCase action)
2541 {
2542         // process sequences of modified characters; in change
2543         // tracking mode, this approach results in much better
2544         // usability than changing case on a char-by-char basis
2545         docstring changes;
2546
2547         bool const trackChanges = bparams.trackChanges;
2548
2549         bool capitalize = true;
2550
2551         for (; pos < right; ++pos) {
2552                 char_type oldChar = d->text_[pos];
2553                 char_type newChar = oldChar;
2554
2555                 // ignore insets and don't play with deleted text!
2556                 if (oldChar != META_INSET && !isDeleted(pos)) {
2557                         switch (action) {
2558                                 case text_lowercase:
2559                                         newChar = lowercase(oldChar);
2560                                         break;
2561                                 case text_capitalization:
2562                                         if (capitalize) {
2563                                                 newChar = uppercase(oldChar);
2564                                                 capitalize = false;
2565                                         }
2566                                         break;
2567                                 case text_uppercase:
2568                                         newChar = uppercase(oldChar);
2569                                         break;
2570                         }
2571                 }
2572
2573                 if (!isLetter(pos) || isDeleted(pos)) {
2574                         // permit capitalization again
2575                         capitalize = true;
2576                 }
2577
2578                 if (oldChar != newChar)
2579                         changes += newChar;
2580
2581                 if (oldChar == newChar || pos == right - 1) {
2582                         if (oldChar != newChar) {
2583                                 // step behind the changing area
2584                                 pos++;
2585                         }
2586                         int erasePos = pos - changes.size();
2587                         for (size_t i = 0; i < changes.size(); i++) {
2588                                 insertChar(pos, changes[i],
2589                                         getFontSettings(bparams,
2590                                         erasePos),
2591                                         trackChanges);
2592                                 if (!eraseChar(erasePos, trackChanges)) {
2593                                         ++erasePos;
2594                                         ++pos; // advance
2595                                         ++right; // expand selection
2596                                 }
2597                         }
2598                         changes.clear();
2599                 }
2600         }
2601 }
2602
2603
2604 bool Paragraph::find(docstring const & str, bool cs, bool mw,
2605                 pos_type pos, bool del) const
2606 {
2607         int const strsize = str.length();
2608         int i = 0;
2609         pos_type const parsize = d->text_.size();
2610         for (i = 0; pos + i < parsize; ++i) {
2611                 if (i >= strsize)
2612                         break;
2613                 if (cs && str[i] != d->text_[pos + i])
2614                         break;
2615                 if (!cs && uppercase(str[i]) != uppercase(d->text_[pos + i]))
2616                         break;
2617                 if (!del && isDeleted(pos + i))
2618                         break;
2619         }
2620
2621         if (i != strsize)
2622                 return false;
2623
2624         // if necessary, check whether string matches word
2625         if (mw) {
2626                 if (pos > 0 && isLetter(pos - 1))
2627                         return false;
2628                 if (pos + strsize < parsize
2629                         && isLetter(pos + strsize))
2630                         return false;
2631         }
2632
2633         return true;
2634 }
2635
2636
2637 char_type Paragraph::getChar(pos_type pos) const
2638 {
2639         return d->text_[pos];
2640 }
2641
2642
2643 pos_type Paragraph::size() const
2644 {
2645         return d->text_.size();
2646 }
2647
2648
2649 bool Paragraph::empty() const
2650 {
2651         return d->text_.empty();
2652 }
2653
2654
2655 bool Paragraph::isInset(pos_type pos) const
2656 {
2657         return d->text_[pos] == META_INSET;
2658 }
2659
2660
2661 bool Paragraph::isSeparator(pos_type pos) const
2662 {
2663         //FIXME: Are we sure this can be the only separator?
2664         return d->text_[pos] == ' ';
2665 }
2666
2667
2668 } // namespace lyx