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 Richard Heck (XHTML output)
   9  * \author Jean-Marc Lasgouttes
  10  * \author Angus Leeming
  11  * \author John Levon
  12  * \author André Pönitz
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "Paragraph.h"
  22
  23 #include "LayoutFile.h"
  24 #include "Buffer.h"
  25 #include "BufferParams.h"
  26 #include "Changes.h"
  27 #include "Counters.h"
  28 #include "BufferEncodings.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 "OutputParams.h"
  38 #include "output_latex.h"
  39 #include "output_xhtml.h"
  40 #include "ParagraphParameters.h"
  41 #include "SpellChecker.h"
  42 #include "sgml.h"
  43 #include "TextClass.h"
  44 #include "TexRow.h"
  45 #include "Text.h"
  46 #include "WordLangTuple.h"
  47 #include "WordList.h"
  48
  49 #include "frontends/alert.h"
  50
  51 #include "insets/InsetBibitem.h"
  52 #include "insets/InsetLabel.h"
  53 #include "insets/InsetSpecialChar.h"
  54
  55 #include "support/debug.h"
  56 #include "support/docstring_list.h"
  57 #include "support/ExceptionMessage.h"
  58 #include "support/gettext.h"
  59 #include "support/lassert.h"
  60 #include "support/lstrings.h"
  61 #include "support/textutils.h"
  62
  63 #include <sstream>
  64 #include <vector>
  65
  66 using namespace std;
  67 using namespace lyx::support;
  68
  69 namespace lyx {
  70
  71 namespace {
  72
  73 /// Inset identifier (above 0x10ffff, for ucs-4)
  74 char_type const META_INSET = 0x200001;
  75
  76 }
  77
  78
  79 /////////////////////////////////////////////////////////////////////
  80 //
  81 // SpellResultRange
  82 //
  83 /////////////////////////////////////////////////////////////////////
  84
  85 class SpellResultRange {
  86 public:
  87         SpellResultRange(FontSpan range, SpellChecker::Result result)
  88         : range_(range), result_(result)
  89         {}
  90         ///
  91         FontSpan const & range() const { return range_; }
  92         ///
  93         void range(FontSpan const & r) { range_ = r; }
  94         ///
  95         SpellChecker::Result result() const { return result_; }
  96         ///
  97         void result(SpellChecker::Result r) { result_ = r; }
  98         ///
  99         bool inside(pos_type pos) const { return range_.inside(pos); }
 100         ///
 101         bool covered(FontSpan const & r) const
 102         {
 103                 // 1. first of new range inside current range or
 104                 // 2. last of new range inside current range or
 105                 // 3. first of current range inside new range or
 106                 // 4. last of current range inside new range
 107                 return range_.inside(r.first) || range_.inside(r.last) ||
 108                         r.inside(range_.first) || r.inside(range_.last);
 109         }
 110         ///
 111         void shift(pos_type pos, int offset)
 112         {
 113                 if (range_.first > pos) {
 114                         range_.first += offset;
 115                         range_.last += offset;
 116                 } else if (range_.last >= pos) {
 117                         range_.last += offset;
 118                 }
 119         }
 120 private:
 121         FontSpan range_ ;
 122         SpellChecker::Result result_ ;
 123 };
 124
 125
 126 /////////////////////////////////////////////////////////////////////
 127 //
 128 // SpellCheckerState
 129 //
 130 /////////////////////////////////////////////////////////////////////
 131
 132 class SpellCheckerState {
 133 public:
 134         SpellCheckerState()
 135         {
 136                 needs_refresh_ = true;
 137                 current_change_number_ = 0;
 138         }
 139
 140         void setRange(FontSpan const & fp, SpellChecker::Result state)
 141         {
 142                 Ranges result;
 143                 RangesIterator et = ranges_.end();
 144                 RangesIterator it = ranges_.begin();
 145                 for (; it != et; ++it) {
 146                         if (!it->covered(fp))
 147                                 result.push_back(SpellResultRange(it->range(), it->result()));
 148                         else if (state == SpellChecker::WORD_OK) {
 149                                 // trim or split the current misspelled range
 150                                 // store misspelled ranges only
 151                                 FontSpan range = it->range();
 152                                 if (fp.first > range.first) {
 153                                         // misspelled area in front of WORD_OK
 154                                         range.last = fp.first - 1;
 155                                         result.push_back(SpellResultRange(range, it->result()));
 156                                         range = it->range();
 157                                 }
 158                                 if (fp.last < range.last) {
 159                                         // misspelled area after WORD_OK range
 160                                         range.first = fp.last + 1;
 161                                         result.push_back(SpellResultRange(range, it->result()));
 162                                 }
 163                         }
 164                 }
 165                 ranges_ = result;
 166                 if (state != SpellChecker::WORD_OK)
 167                         ranges_.push_back(SpellResultRange(fp, state));
 168         }
 169
 170         void increasePosAfterPos(pos_type pos)
 171         {
 172                 correctRangesAfterPos(pos, 1);
 173                 needsRefresh(pos);
 174         }
 175
 176         void decreasePosAfterPos(pos_type pos)
 177         {
 178                 correctRangesAfterPos(pos, -1);
 179                 needsRefresh(pos);
 180         }
 181
 182         void refreshLast(pos_type pos)
 183         {
 184                 if (pos < refresh_.last)
 185                         refresh_.last = pos;
 186         }
 187
 188         SpellChecker::Result getState(pos_type pos) const
 189         {
 190                 SpellChecker::Result result = SpellChecker::WORD_OK;
 191                 RangesIterator et = ranges_.end();
 192                 RangesIterator it = ranges_.begin();
 193                 for (; it != et; ++it) {
 194                         if(it->inside(pos)) {
 195                                 return it->result();
 196                         }
 197                 }
 198                 return result;
 199         }
 200
 201         FontSpan const & getRange(pos_type pos) const
 202         {
 203                 /// empty span to indicate mismatch
 204                 static FontSpan empty_;
 205                 RangesIterator et = ranges_.end();
 206                 RangesIterator it = ranges_.begin();
 207                 for (; it != et; ++it) {
 208                         if(it->inside(pos)) {
 209                                 return it->range();
 210                         }
 211                 }
 212                 return empty_;
 213         }
 214
 215         bool needsRefresh() const
 216         {
 217                 return needs_refresh_;
 218         }
 219
 220         SpellChecker::ChangeNumber currentChangeNumber() const
 221         {
 222                 return current_change_number_;
 223         }
 224
 225         void refreshRange(pos_type & first, pos_type & last) const
 226         {
 227                 first = refresh_.first;
 228                 last = refresh_.last;
 229         }
 230
 231         void needsRefresh(pos_type pos)
 232         {
 233                 if (needs_refresh_ && pos != -1) {
 234                         if (pos < refresh_.first)
 235                                 refresh_.first = pos;
 236                         if (pos > refresh_.last)
 237                                 refresh_.last = pos;
 238                 } else if (pos != -1) {
 239                         // init request check for neighbour positions too
 240                         refresh_.first = pos > 0 ? pos - 1 : 0;
 241                         // no need for special end of paragraph check
 242                         refresh_.last = pos + 1;
 243                 }
 244                 needs_refresh_ = pos != -1;
 245         }
 246
 247         void needsCompleteRefresh(SpellChecker::ChangeNumber change_number)
 248         {
 249                 needs_refresh_ = true;
 250                 refresh_.first = 0;
 251                 refresh_.last = -1;
 252                 current_change_number_ = change_number;
 253         }
 254 private:
 255         typedef vector<SpellResultRange> Ranges;
 256         typedef Ranges::const_iterator RangesIterator;
 257         Ranges ranges_;
 258         /// the area of the paragraph with pending spell check
 259         FontSpan refresh_;
 260         bool needs_refresh_;
 261         /// spell state cache version number
 262         SpellChecker::ChangeNumber current_change_number_;
 263
 264
 265         void correctRangesAfterPos(pos_type pos, int offset)
 266         {
 267                 RangesIterator et = ranges_.end();
 268                 Ranges::iterator it = ranges_.begin();
 269                 for (; it != et; ++it) {
 270                         it->shift(pos, offset);
 271                 }
 272         }
 273
 274 };
 275
 276 /////////////////////////////////////////////////////////////////////
 277 //
 278 // Paragraph::Private
 279 //
 280 /////////////////////////////////////////////////////////////////////
 281
 282 class Paragraph::Private
 283 {
 284 public:
 285         ///
 286         Private(Paragraph * owner, Layout const & layout);
 287         /// "Copy constructor"
 288         Private(Private const &, Paragraph * owner);
 289         /// Copy constructor from \p beg  to \p end
 290         Private(Private const &, Paragraph * owner, pos_type beg, pos_type end);
 291
 292         ///
 293         void insertChar(pos_type pos, char_type c, Change const & change);
 294
 295         /// Output the surrogate pair formed by \p c and \p next to \p os.
 296         /// \return the number of characters written.
 297         int latexSurrogatePair(otexstream & os, char_type c, char_type next,
 298                                OutputParams const &);
 299
 300         /// Output a space in appropriate formatting (or a surrogate pair
 301         /// if the next character is a combining character).
 302         /// \return whether a surrogate pair was output.
 303         bool simpleTeXBlanks(OutputParams const &,
 304                              otexstream &,
 305                              pos_type i,
 306                              unsigned int & column,
 307                              Font const & font,
 308                              Layout const & style);
 309
 310         /// Output consecutive unicode chars, belonging to the same script as
 311         /// specified by the latex macro \p ltx, to \p os starting from \p i.
 312         /// \return the number of characters written.
 313         int writeScriptChars(otexstream & os, docstring const & ltx,
 314                            Change const &, Encoding const &, pos_type & i);
 315
 316         /// This could go to ParagraphParameters if we want to.
 317         int startTeXParParams(BufferParams const &, otexstream &,
 318                               OutputParams const &) const;
 319
 320         /// This could go to ParagraphParameters if we want to.
 321         bool endTeXParParams(BufferParams const &, otexstream &,
 322                              OutputParams const &) const;
 323
 324         ///
 325         void latexInset(BufferParams const &,
 326                                    otexstream &,
 327                                    OutputParams &,
 328                                    Font & running_font,
 329                                    Font & basefont,
 330                                    Font const & outerfont,
 331                                    bool & open_font,
 332                                    Change & running_change,
 333                                    Layout const & style,
 334                                    pos_type & i,
 335                                    unsigned int & column);
 336
 337         ///
 338         void latexSpecialChar(
 339                                    otexstream & os,
 340                                    BufferParams const & bparams,
 341                                    OutputParams const & runparams,
 342                                    Font const & running_font,
 343                                    Change const & running_change,
 344                                    Layout const & style,
 345                                    pos_type & i,
 346                                    pos_type end_pos,
 347                                    unsigned int & column);
 348
 349         ///
 350         bool latexSpecialT1(
 351                 char_type const c,
 352                 otexstream & os,
 353                 pos_type i,
 354                 unsigned int & column);
 355         ///
 356         bool latexSpecialT3(
 357                 char_type const c,
 358                 otexstream & os,
 359                 pos_type i,
 360                 unsigned int & column);
 361         ///
 362         bool latexSpecialTypewriter(
 363                 char_type const c,
 364                 otexstream & os,
 365                 pos_type i,
 366                 unsigned int & column);
 367         ///
 368         bool latexSpecialPhrase(
 369                 otexstream & os,
 370                 pos_type & i,
 371                 pos_type end_pos,
 372                 unsigned int & column,
 373                 OutputParams const & runparams);
 374
 375         ///
 376         void validate(LaTeXFeatures & features) const;
 377
 378         /// Checks if the paragraph contains only text and no inset or font change.
 379         bool onlyText(Buffer const & buf, Font const & outerfont,
 380                       pos_type initial) const;
 381
 382         /// match a string against a particular point in the paragraph
 383         bool isTextAt(string const & str, pos_type pos) const;
 384
 385         /// a vector of speller skip positions
 386         typedef vector<FontSpan> SkipPositions;
 387         typedef SkipPositions::const_iterator SkipPositionsIterator;
 388
 389         void appendSkipPosition(SkipPositions & skips, pos_type const pos) const;
 390
 391         Language * getSpellLanguage(pos_type const from) const;
 392
 393         Language * locateSpellRange(pos_type & from, pos_type & to,
 394                                     SkipPositions & skips) const;
 395
 396         bool hasSpellerChange() const
 397         {
 398                 SpellChecker::ChangeNumber speller_change_number = 0;
 399                 if (theSpellChecker())
 400                         speller_change_number = theSpellChecker()->changeNumber();
 401                 return speller_change_number > speller_state_.currentChangeNumber();
 402         }
 403
 404         bool ignoreWord(docstring const & word) const ;
 405
 406         void setMisspelled(pos_type from, pos_type to, SpellChecker::Result state)
 407         {
 408                 pos_type textsize = owner_->size();
 409                 // check for sane arguments
 410                 if (to <= from || from >= textsize)
 411                         return;
 412                 FontSpan fp = FontSpan(from, to - 1);
 413                 speller_state_.setRange(fp, state);
 414         }
 415
 416         void requestSpellCheck(pos_type pos)
 417         {
 418                 if (pos == -1)
 419                         speller_state_.needsCompleteRefresh(speller_state_.currentChangeNumber());
 420                 else
 421                         speller_state_.needsRefresh(pos);
 422         }
 423
 424         void readySpellCheck()
 425         {
 426                 speller_state_.needsRefresh(-1);
 427         }
 428
 429         bool needsSpellCheck() const
 430         {
 431                 return speller_state_.needsRefresh();
 432         }
 433
 434         void rangeOfSpellCheck(pos_type & first, pos_type & last) const
 435         {
 436                 speller_state_.refreshRange(first, last);
 437                 if (last == -1) {
 438                         last = owner_->size();
 439                         return;
 440                 }
 441                 pos_type endpos = last;
 442                 owner_->locateWord(first, endpos, WHOLE_WORD);
 443                 if (endpos < last) {
 444                         endpos = last;
 445                         owner_->locateWord(last, endpos, WHOLE_WORD);
 446                 }
 447                 last = endpos;
 448         }
 449
 450         int countSkips(SkipPositionsIterator & it, SkipPositionsIterator const et,
 451                             int & start) const
 452         {
 453                 int numskips = 0;
 454                 while (it != et && it->first < start) {
 455                         int skip = it->last - it->first + 1;
 456                         start += skip;
 457                         numskips += skip;
 458                         ++it;
 459                 }
 460                 return numskips;
 461         }
 462
 463         void markMisspelledWords(pos_type const & first, pos_type const & last,
 464                                                          SpellChecker::Result result,
 465                                                          docstring const & word,
 466                                                          SkipPositions const & skips);
 467
 468         InsetCode ownerCode() const
 469         {
 470                 return inset_owner_ ? inset_owner_->lyxCode() : NO_CODE;
 471         }
 472
 473         /// Which Paragraph owns us?
 474         Paragraph * owner_;
 475
 476         /// In which Inset?
 477         Inset const * inset_owner_;
 478
 479         ///
 480         FontList fontlist_;
 481
 482         ///
 483         int id_;
 484
 485         ///
 486         ParagraphParameters params_;
 487
 488         /// for recording and looking up changes
 489         Changes changes_;
 490
 491         ///
 492         InsetList insetlist_;
 493
 494         /// end of label
 495         pos_type begin_of_body_;
 496
 497         typedef docstring TextContainer;
 498         ///
 499         TextContainer text_;
 500
 501         typedef set<docstring> Words;
 502         typedef map<Language, Words> LangWordsMap;
 503         ///
 504         LangWordsMap words_;
 505         ///
 506         Layout const * layout_;
 507         ///
 508         SpellCheckerState speller_state_;
 509 };
 510
 511
 512 namespace {
 513
 514 struct special_phrase {
 515         string phrase;
 516         docstring macro;
 517         bool builtin;
 518 };
 519
 520 special_phrase const special_phrases[] = {
 521         { "LyX", from_ascii("\\LyX{}"), false },
 522         { "TeX", from_ascii("\\TeX{}"), true },
 523         { "LaTeX2e", from_ascii("\\LaTeXe{}"), true },
 524         { "LaTeX", from_ascii("\\LaTeX{}"), true },
 525 };
 526
 527 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
 528
 529 } // namespace anon
 530
 531
 532 Paragraph::Private::Private(Paragraph * owner, Layout const & layout)
 533         : owner_(owner), inset_owner_(0), id_(-1), begin_of_body_(0), layout_(&layout)
 534 {
 535         text_.reserve(100);
 536 }
 537
 538
 539 // Initialization of the counter for the paragraph id's,
 540 //
 541 // FIXME: There should be a more intelligent way to generate and use the
 542 // paragraph ids per buffer instead a global static counter for all InsetText
 543 // in the running program.
 544 static int paragraph_id = -1;
 545
 546 Paragraph::Private::Private(Private const & p, Paragraph * owner)
 547         : owner_(owner), inset_owner_(p.inset_owner_), fontlist_(p.fontlist_),
 548           params_(p.params_), changes_(p.changes_), insetlist_(p.insetlist_),
 549           begin_of_body_(p.begin_of_body_), text_(p.text_), words_(p.words_),
 550           layout_(p.layout_)
 551 {
 552         id_ = ++paragraph_id;
 553         requestSpellCheck(p.text_.size());
 554 }
 555
 556
 557 Paragraph::Private::Private(Private const & p, Paragraph * owner,
 558         pos_type beg, pos_type end)
 559         : owner_(owner), inset_owner_(p.inset_owner_),
 560           params_(p.params_), changes_(p.changes_),
 561           insetlist_(p.insetlist_, beg, end),
 562           begin_of_body_(p.begin_of_body_), words_(p.words_),
 563           layout_(p.layout_)
 564 {
 565         id_ = ++paragraph_id;
 566         if (beg >= pos_type(p.text_.size()))
 567                 return;
 568         text_ = p.text_.substr(beg, end - beg);
 569
 570         FontList::const_iterator fcit = fontlist_.begin();
 571         FontList::const_iterator fend = fontlist_.end();
 572         for (; fcit != fend; ++fcit) {
 573                 if (fcit->pos() < beg)
 574                         continue;
 575                 if (fcit->pos() >= end) {
 576                         // Add last entry in the fontlist_.
 577                         fontlist_.set(text_.size() - 1, fcit->font());
 578                         break;
 579                 }
 580                 // Add a new entry in the fontlist_.
 581                 fontlist_.set(fcit->pos() - beg, fcit->font());
 582         }
 583         requestSpellCheck(p.text_.size());
 584 }
 585
 586
 587 void Paragraph::addChangesToToc(DocIterator const & cdit,
 588         Buffer const & buf, bool output_active) const
 589 {
 590         d->changes_.addToToc(cdit, buf, output_active);
 591 }
 592
 593
 594 bool Paragraph::isDeleted(pos_type start, pos_type end) const
 595 {
 596         LASSERT(start >= 0 && start <= size(), return false);
 597         LASSERT(end > start && end <= size() + 1, return false);
 598
 599         return d->changes_.isDeleted(start, end);
 600 }
 601
 602
 603 bool Paragraph::isChanged(pos_type start, pos_type end) const
 604 {
 605         LASSERT(start >= 0 && start <= size(), return false);
 606         LASSERT(end > start && end <= size() + 1, return false);
 607
 608         return d->changes_.isChanged(start, end);
 609 }
 610
 611
 612 bool Paragraph::isMergedOnEndOfParDeletion(bool trackChanges) const
 613 {
 614         // keep the logic here in sync with the logic of eraseChars()
 615         if (!trackChanges)
 616                 return true;
 617
 618         Change const change = d->changes_.lookup(size());
 619         return change.inserted() && change.currentAuthor();
 620 }
 621
 622
 623 void Paragraph::setChange(Change const & change)
 624 {
 625         // beware of the imaginary end-of-par character!
 626         d->changes_.set(change, 0, size() + 1);
 627
 628         /*
 629          * Propagate the change recursively - but not in case of DELETED!
 630          *
 631          * Imagine that your co-author makes changes in an existing inset. He
 632          * sends your document to you and you come to the conclusion that the
 633          * inset should go completely. If you erase it, LyX must not delete all
 634          * text within the inset. Otherwise, the change tracked insertions of
 635          * your co-author get lost and there is no way to restore them later.
 636          *
 637          * Conclusion: An inset's content should remain untouched if you delete it
 638          */
 639
 640         if (!change.deleted()) {
 641                 for (pos_type pos = 0; pos < size(); ++pos) {
 642                         if (Inset * inset = getInset(pos))
 643                                 inset->setChange(change);
 644                 }
 645         }
 646 }
 647
 648
 649 void Paragraph::setChange(pos_type pos, Change const & change)
 650 {
 651         LASSERT(pos >= 0 && pos <= size(), return);
 652         d->changes_.set(change, pos);
 653
 654         // see comment in setChange(Change const &) above
 655         if (!change.deleted() && pos < size())
 656                         if (Inset * inset = getInset(pos))
 657                                 inset->setChange(change);
 658 }
 659
 660
 661 Change const & Paragraph::lookupChange(pos_type pos) const
 662 {
 663         LBUFERR(pos >= 0 && pos <= size());
 664         return d->changes_.lookup(pos);
 665 }
 666
 667
 668 void Paragraph::acceptChanges(pos_type start, pos_type end)
 669 {
 670         LASSERT(start >= 0 && start <= size(), return);
 671         LASSERT(end > start && end <= size() + 1, return);
 672
 673         for (pos_type pos = start; pos < end; ++pos) {
 674                 switch (lookupChange(pos).type) {
 675                         case Change::UNCHANGED:
 676                                 // accept changes in nested inset
 677                                 if (Inset * inset = getInset(pos))
 678                                         inset->acceptChanges();
 679                                 break;
 680
 681                         case Change::INSERTED:
 682                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 683                                 // also accept changes in nested inset
 684                                 if (Inset * inset = getInset(pos))
 685                                         inset->acceptChanges();
 686                                 break;
 687
 688                         case Change::DELETED:
 689                                 // Suppress access to non-existent
 690                                 // "end-of-paragraph char"
 691                                 if (pos < size()) {
 692                                         eraseChar(pos, false);
 693                                         --end;
 694                                         --pos;
 695                                 }
 696                                 break;
 697                 }
 698
 699         }
 700 }
 701
 702
 703 void Paragraph::rejectChanges(pos_type start, pos_type end)
 704 {
 705         LASSERT(start >= 0 && start <= size(), return);
 706         LASSERT(end > start && end <= size() + 1, return);
 707
 708         for (pos_type pos = start; pos < end; ++pos) {
 709                 switch (lookupChange(pos).type) {
 710                         case Change::UNCHANGED:
 711                                 // reject changes in nested inset
 712                                 if (Inset * inset = getInset(pos))
 713                                                 inset->rejectChanges();
 714                                 break;
 715
 716                         case Change::INSERTED:
 717                                 // Suppress access to non-existent
 718                                 // "end-of-paragraph char"
 719                                 if (pos < size()) {
 720                                         eraseChar(pos, false);
 721                                         --end;
 722                                         --pos;
 723                                 }
 724                                 break;
 725
 726                         case Change::DELETED:
 727                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 728
 729                                 // Do NOT reject changes within a deleted inset!
 730                                 // There may be insertions of a co-author inside of it!
 731
 732                                 break;
 733                 }
 734         }
 735 }
 736
 737
 738 void Paragraph::Private::insertChar(pos_type pos, char_type c,
 739                 Change const & change)
 740 {
 741         LASSERT(pos >= 0 && pos <= int(text_.size()), return);
 742
 743         // track change
 744         changes_.insert(change, pos);
 745
 746         // This is actually very common when parsing buffers (and
 747         // maybe inserting ascii text)
 748         if (pos == pos_type(text_.size())) {
 749                 // when appending characters, no need to update tables
 750                 text_.push_back(c);
 751                 // but we want spell checking
 752                 requestSpellCheck(pos);
 753                 return;
 754         }
 755
 756         text_.insert(text_.begin() + pos, c);
 757
 758         // Update the font table.
 759         fontlist_.increasePosAfterPos(pos);
 760
 761         // Update the insets
 762         insetlist_.increasePosAfterPos(pos);
 763
 764         // Update list of misspelled positions
 765         speller_state_.increasePosAfterPos(pos);
 766 }
 767
 768
 769 bool Paragraph::insertInset(pos_type pos, Inset * inset,
 770                                    Font const & font, Change const & change)
 771 {
 772         LASSERT(inset, return false);
 773         LASSERT(pos >= 0 && pos <= size(), return false);
 774
 775         // Paragraph::insertInset() can be used in cut/copy/paste operation where
 776         // d->inset_owner_ is not set yet.
 777         if (d->inset_owner_ && !d->inset_owner_->insetAllowed(inset->lyxCode()))
 778                 return false;
 779
 780         d->insertChar(pos, META_INSET, change);
 781         LASSERT(d->text_[pos] == META_INSET, return false);
 782
 783         // Add a new entry in the insetlist_.
 784         d->insetlist_.insert(inset, pos);
 785
 786         // Some insets require run of spell checker
 787         requestSpellCheck(pos);
 788         setFont(pos, font);
 789         return true;
 790 }
 791
 792
 793 bool Paragraph::eraseChar(pos_type pos, bool trackChanges)
 794 {
 795         LASSERT(pos >= 0 && pos <= size(), return false);
 796
 797         // keep the logic here in sync with the logic of isMergedOnEndOfParDeletion()
 798
 799         if (trackChanges) {
 800                 Change change = d->changes_.lookup(pos);
 801
 802                 // set the character to DELETED if
 803                 //  a) it was previously unchanged or
 804                 //  b) it was inserted by a co-author
 805
 806                 if (!change.changed() ||
 807                       (change.inserted() && !change.currentAuthor())) {
 808                         setChange(pos, Change(Change::DELETED));
 809                         // request run of spell checker
 810                         requestSpellCheck(pos);
 811                         return false;
 812                 }
 813
 814                 if (change.deleted())
 815                         return false;
 816         }
 817
 818         // Don't physically access the imaginary end-of-paragraph character.
 819         // eraseChar() can only mark it as DELETED. A physical deletion of
 820         // end-of-par must be handled externally.
 821         if (pos == size()) {
 822                 return false;
 823         }
 824
 825         // track change
 826         d->changes_.erase(pos);
 827
 828         // if it is an inset, delete the inset entry
 829         if (d->text_[pos] == META_INSET)
 830                 d->insetlist_.erase(pos);
 831
 832         d->text_.erase(d->text_.begin() + pos);
 833
 834         // Update the fontlist_
 835         d->fontlist_.erase(pos);
 836
 837         // Update the insetlist_
 838         d->insetlist_.decreasePosAfterPos(pos);
 839
 840         // Update list of misspelled positions
 841         d->speller_state_.decreasePosAfterPos(pos);
 842         d->speller_state_.refreshLast(size());
 843
 844         return true;
 845 }
 846
 847
 848 int Paragraph::eraseChars(pos_type start, pos_type end, bool trackChanges)
 849 {
 850         LASSERT(start >= 0 && start <= size(), return 0);
 851         LASSERT(end >= start && end <= size() + 1, return 0);
 852
 853         pos_type i = start;
 854         for (pos_type count = end - start; count; --count) {
 855                 if (!eraseChar(i, trackChanges))
 856                         ++i;
 857         }
 858         return end - i;
 859 }
 860
 861
 862 int Paragraph::Private::latexSurrogatePair(otexstream & os, char_type c,
 863                 char_type next, OutputParams const & runparams)
 864 {
 865         // Writing next here may circumvent a possible font change between
 866         // c and next. Since next is only output if it forms a surrogate pair
 867         // with c we can ignore this:
 868         // A font change inside a surrogate pair does not make sense and is
 869         // hopefully impossible to input.
 870         // FIXME: change tracking
 871         // Is this correct WRT change tracking?
 872         Encoding const & encoding = *(runparams.encoding);
 873         docstring latex1 = encoding.latexChar(next).first;
 874         if (runparams.inIPA) {
 875                 string const tipashortcut = Encodings::TIPAShortcut(next);
 876                 if (!tipashortcut.empty()) {
 877                         latex1 = from_ascii(tipashortcut);
 878                 }
 879         }
 880         docstring const latex2 = encoding.latexChar(c).first;
 881         if (docstring(1, next) == latex1) {
 882                 // the encoding supports the combination
 883                 os << latex2 << latex1;
 884                 return latex1.length() + latex2.length();
 885         } else if (runparams.local_font &&
 886                    runparams.local_font->language()->lang() == "polutonikogreek") {
 887                 // polutonikogreek only works without the brackets
 888                 os << latex1 << latex2;
 889                 return latex1.length() + latex2.length();
 890         } else
 891                 os << latex1 << '{' << latex2 << '}';
 892         return latex1.length() + latex2.length() + 2;
 893 }
 894
 895
 896 bool Paragraph::Private::simpleTeXBlanks(OutputParams const & runparams,
 897                                        otexstream & os,
 898                                        pos_type i,
 899                                        unsigned int & column,
 900                                        Font const & font,
 901                                        Layout const & style)
 902 {
 903         if (style.pass_thru || runparams.pass_thru)
 904                 return false;
 905
 906         if (i + 1 < int(text_.size())) {
 907                 char_type next = text_[i + 1];
 908                 if (Encodings::isCombiningChar(next)) {
 909                         // This space has an accent, so we must always output it.
 910                         column += latexSurrogatePair(os, ' ', next, runparams) - 1;
 911                         return true;
 912                 }
 913         }
 914
 915         if (runparams.linelen > 0
 916             && column > runparams.linelen
 917             && i
 918             && text_[i - 1] != ' '
 919             && (i + 1 < int(text_.size()))
 920             // same in FreeSpacing mode
 921             && !owner_->isFreeSpacing()
 922             // In typewriter mode, we want to avoid
 923             // ! . ? : at the end of a line
 924             && !(font.fontInfo().family() == TYPEWRITER_FAMILY
 925                  && (text_[i - 1] == '.'
 926                      || text_[i - 1] == '?'
 927                      || text_[i - 1] == ':'
 928                      || text_[i - 1] == '!'))) {
 929                 os << '\n';
 930                 os.texrow().start(owner_->id(), i + 1);
 931                 column = 0;
 932         } else if (style.free_spacing) {
 933                 os << '~';
 934         } else {
 935                 os << ' ';
 936         }
 937         return false;
 938 }
 939
 940
 941 int Paragraph::Private::writeScriptChars(otexstream & os,
 942                                          docstring const & ltx,
 943                                          Change const & runningChange,
 944                                          Encoding const & encoding,
 945                                          pos_type & i)
 946 {
 947         // FIXME: modifying i here is not very nice...
 948
 949         // We only arrive here when a proper language for character text_[i] has
 950         // not been specified (i.e., it could not be translated in the current
 951         // latex encoding) or its latex translation has been forced, and it
 952         // belongs to a known script.
 953         // Parameter ltx contains the latex translation of text_[i] as specified
 954         // in the unicodesymbols file and is something like "\textXXX{<spec>}".
 955         // The latex macro name "textXXX" specifies the script to which text_[i]
 956         // belongs and we use it in order to check whether characters from the
 957         // same script immediately follow, such that we can collect them in a
 958         // single "\textXXX" macro. So, we have to retain "\textXXX{<spec>"
 959         // for the first char but only "<spec>" for all subsequent chars.
 960         docstring::size_type const brace1 = ltx.find_first_of(from_ascii("{"));
 961         docstring::size_type const brace2 = ltx.find_last_of(from_ascii("}"));
 962         string script = to_ascii(ltx.substr(1, brace1 - 1));
 963         int pos = 0;
 964         int length = brace2;
 965         bool closing_brace = true;
 966         if (script == "textgreek" && encoding.latexName() == "iso-8859-7") {
 967                 // Correct encoding is being used, so we can avoid \textgreek.
 968                 pos = brace1 + 1;
 969                 length -= pos;
 970                 closing_brace = false;
 971         }
 972         os << ltx.substr(pos, length);
 973         int size = text_.size();
 974         while (i + 1 < size) {
 975                 char_type const next = text_[i + 1];
 976                 // Stop here if next character belongs to another script
 977                 // or there is a change in change tracking status.
 978                 if (!Encodings::isKnownScriptChar(next, script) ||
 979                     runningChange != owner_->lookupChange(i + 1))
 980                         break;
 981                 Font prev_font;
 982                 bool found = false;
 983                 FontList::const_iterator cit = fontlist_.begin();
 984                 FontList::const_iterator end = fontlist_.end();
 985                 for (; cit != end; ++cit) {
 986                         if (cit->pos() >= i && !found) {
 987                                 prev_font = cit->font();
 988                                 found = true;
 989                         }
 990                         if (cit->pos() >= i + 1)
 991                                 break;
 992                 }
 993                 // Stop here if there is a font attribute or encoding change.
 994                 if (found && cit != end && prev_font != cit->font())
 995                         break;
 996                 docstring const latex = encoding.latexChar(next).first;
 997                 docstring::size_type const b1 =
 998                                         latex.find_first_of(from_ascii("{"));
 999                 docstring::size_type const b2 =
1000                                         latex.find_last_of(from_ascii("}"));
1001                 int const len = b2 - b1 - 1;
1002                 os << latex.substr(b1 + 1, len);
1003                 length += len;
1004                 ++i;
1005         }
1006         if (closing_brace) {
1007                 os << '}';
1008                 ++length;
1009         }
1010         return length;
1011 }
1012
1013
1014 bool Paragraph::Private::isTextAt(string const & str, pos_type pos) const
1015 {
1016         pos_type const len = str.length();
1017
1018         // is the paragraph large enough?
1019         if (pos + len > int(text_.size()))
1020                 return false;
1021
1022         // does the wanted text start at point?
1023         for (string::size_type i = 0; i < str.length(); ++i) {
1024                 // Caution: direct comparison of characters works only
1025                 // because str is pure ASCII.
1026                 if (str[i] != text_[pos + i])
1027                         return false;
1028         }
1029
1030         return fontlist_.hasChangeInRange(pos, len);
1031 }
1032
1033
1034 void Paragraph::Private::latexInset(BufferParams const & bparams,
1035                                     otexstream & os,
1036                                     OutputParams & runparams,
1037                                     Font & running_font,
1038                                     Font & basefont,
1039                                     Font const & outerfont,
1040                                     bool & open_font,
1041                                     Change & running_change,
1042                                     Layout const & style,
1043                                     pos_type & i,
1044                                     unsigned int & column)
1045 {
1046         Inset * inset = owner_->getInset(i);
1047         LBUFERR(inset);
1048
1049         if (style.pass_thru) {
1050                 odocstringstream ods;
1051                 inset->plaintext(ods, runparams);
1052                 os << ods.str();
1053                 return;
1054         }
1055
1056         // FIXME: move this to InsetNewline::latex
1057         if (inset->lyxCode() == NEWLINE_CODE) {
1058                 // newlines are handled differently here than
1059                 // the default in simpleTeXSpecialChars().
1060                 if (!style.newline_allowed) {
1061                         os << '\n';
1062                 } else {
1063                         if (open_font) {
1064                                 column += running_font.latexWriteEndChanges(
1065                                         os, bparams, runparams,
1066                                         basefont, basefont);
1067                                 open_font = false;
1068                         }
1069
1070                         if (running_font.fontInfo().family() == TYPEWRITER_FAMILY)
1071                                 os << '~';
1072
1073                         basefont = owner_->getLayoutFont(bparams, outerfont);
1074                         running_font = basefont;
1075
1076                         if (runparams.moving_arg)
1077                                 os << "\\protect ";
1078
1079                 }
1080                 os.texrow().start(owner_->id(), i + 1);
1081                 column = 0;
1082         }
1083
1084         if (owner_->isDeleted(i)) {
1085                 if( ++runparams.inDeletedInset == 1)
1086                         runparams.changeOfDeletedInset = owner_->lookupChange(i);
1087         }
1088
1089         if (inset->canTrackChanges()) {
1090                 column += Changes::latexMarkChange(os, bparams, running_change,
1091                         Change(Change::UNCHANGED), runparams);
1092                 running_change = Change(Change::UNCHANGED);
1093         }
1094
1095         bool close = false;
1096         odocstream::pos_type const len = os.os().tellp();
1097
1098         if (inset->forceLTR()
1099             && !runparams.use_polyglossia
1100             && running_font.isRightToLeft()
1101             // ERT is an exception, it should be output with no
1102             // decorations at all
1103             && inset->lyxCode() != ERT_CODE) {
1104                 if (running_font.language()->lang() == "farsi")
1105                         os << "\\beginL{}";
1106                 else
1107                         os << "\\L{";
1108                 close = true;
1109         }
1110
1111         // FIXME: Bug: we can have an empty font change here!
1112         // if there has just been a font change, we are going to close it
1113         // right now, which means stupid latex code like \textsf{}. AFAIK,
1114         // this does not harm dvi output. A minor bug, thus (JMarc)
1115
1116         // Some insets cannot be inside a font change command.
1117         // However, even such insets *can* be placed in \L or \R
1118         // or their equivalents (for RTL language switches), so we don't
1119         // close the language in those cases.
1120         // ArabTeX, though, cannot handle this special behavior, it seems.
1121         bool arabtex = basefont.language()->lang() == "arabic_arabtex"
1122                 || running_font.language()->lang() == "arabic_arabtex";
1123         if (open_font && !inset->inheritFont()) {
1124                 bool closeLanguage = arabtex
1125                         || basefont.isRightToLeft() == running_font.isRightToLeft();
1126                 unsigned int count = running_font.latexWriteEndChanges(os,
1127                         bparams, runparams, basefont, basefont, closeLanguage);
1128                 column += count;
1129                 // if any font properties were closed, update the running_font,
1130                 // making sure, however, to leave the language as it was
1131                 if (count > 0) {
1132                         // FIXME: probably a better way to keep track of the old
1133                         // language, than copying the entire font?
1134                         Font const copy_font(running_font);
1135                         basefont = owner_->getLayoutFont(bparams, outerfont);
1136                         running_font = basefont;
1137                         if (!closeLanguage)
1138                                 running_font.setLanguage(copy_font.language());
1139                         // leave font open if language is still open
1140                         open_font = (running_font.language() == basefont.language());
1141                         if (closeLanguage)
1142                                 runparams.local_font = &basefont;
1143                 }
1144         }
1145
1146         int prev_rows = os.texrow().rows();
1147
1148         try {
1149                 runparams.lastid = id_;
1150                 runparams.lastpos = i;
1151                 inset->latex(os, runparams);
1152         } catch (EncodingException & e) {
1153                 // add location information and throw again.
1154                 e.par_id = id_;
1155                 e.pos = i;
1156                 throw(e);
1157         }
1158
1159         if (close) {
1160                 if (running_font.language()->lang() == "farsi")
1161                                 os << "\\endL{}";
1162                         else
1163                                 os << '}';
1164         }
1165
1166         if (os.texrow().rows() > prev_rows) {
1167                 os.texrow().start(owner_->id(), i + 1);
1168                 column = 0;
1169         } else {
1170                 column += (unsigned int)(os.os().tellp() - len);
1171         }
1172
1173         if (owner_->isDeleted(i))
1174                 --runparams.inDeletedInset;
1175 }
1176
1177
1178 void Paragraph::Private::latexSpecialChar(otexstream & os,
1179                                           BufferParams const & bparams,
1180                                           OutputParams const & runparams,
1181                                           Font const & running_font,
1182                                           Change const & running_change,
1183                                           Layout const & style,
1184                                           pos_type & i,
1185                                           pos_type end_pos,
1186                                           unsigned int & column)
1187 {
1188         // With polyglossia, brackets and stuff need not be reversed
1189         // in RTL scripts (see bug #8251)
1190         char_type const c = (runparams.use_polyglossia) ?
1191                 owner_->getUChar(bparams, i) : text_[i];
1192
1193         if (style.pass_thru || runparams.pass_thru) {
1194                 if (c != '\0') {
1195                         Encoding const * const enc = runparams.encoding;
1196                         if (enc && !enc->encodable(c))
1197                                 throw EncodingException(c);
1198                         os.put(c);
1199                 }
1200                 return;
1201         }
1202
1203         // TIPA uses its own T3 encoding
1204         if (runparams.inIPA && latexSpecialT3(c, os, i, column))
1205                 return;
1206         // If T1 font encoding is used, use the special
1207         // characters it provides.
1208         // NOTE: some languages reset the font encoding
1209         // internally
1210         if (!runparams.inIPA && !running_font.language()->internalFontEncoding()
1211             && lyxrc.fontenc == "T1" && latexSpecialT1(c, os, i, column))
1212                 return;
1213
1214         // \tt font needs special treatment
1215         if (!runparams.inIPA
1216              && running_font.fontInfo().family() == TYPEWRITER_FAMILY
1217              && latexSpecialTypewriter(c, os, i, column))
1218                 return;
1219
1220         // Otherwise, we use what LaTeX provides us.
1221         switch (c) {
1222         case '\\':
1223                 os << "\\textbackslash{}";
1224                 column += 15;
1225                 break;
1226         case '<':
1227                 os << "\\textless{}";
1228                 column += 10;
1229                 break;
1230         case '>':
1231                 os << "\\textgreater{}";
1232                 column += 13;
1233                 break;
1234         case '|':
1235                 os << "\\textbar{}";
1236                 column += 9;
1237                 break;
1238         case '-':
1239                 os << '-';
1240                 break;
1241         case '\"':
1242                 os << "\\char`\\\"{}";
1243                 column += 9;
1244                 break;
1245
1246         case '$': case '&':
1247         case '%': case '#': case '{':
1248         case '}': case '_':
1249                 os << '\\';
1250                 os.put(c);
1251                 column += 1;
1252                 break;
1253
1254         case '~':
1255                 os << "\\textasciitilde{}";
1256                 column += 16;
1257                 break;
1258
1259         case '^':
1260                 os << "\\textasciicircum{}";
1261                 column += 17;
1262                 break;
1263
1264         case '*':
1265         case '[':
1266         case ']':
1267                 // avoid being mistaken for optional arguments
1268                 os << '{';
1269                 os.put(c);
1270                 os << '}';
1271                 column += 2;
1272                 break;
1273
1274         case ' ':
1275                 // Blanks are printed before font switching.
1276                 // Sure? I am not! (try nice-latex)
1277                 // I am sure it's correct. LyX might be smarter
1278                 // in the future, but for now, nothing wrong is
1279                 // written. (Asger)
1280                 break;
1281
1282         default:
1283                 // LyX, LaTeX etc.
1284                 if (latexSpecialPhrase(os, i, end_pos, column, runparams))
1285                         return;
1286
1287                 if (c == '\0')
1288                         return;
1289
1290                 Encoding const & encoding = *(runparams.encoding);
1291                 char_type next = '\0';
1292                 if (i + 1 < int(text_.size())) {
1293                         next = text_[i + 1];
1294                         if (Encodings::isCombiningChar(next)) {
1295                                 column += latexSurrogatePair(os, c, next, runparams) - 1;
1296                                 ++i;
1297                                 break;
1298                         }
1299                 }
1300                 string script;
1301                 pair<docstring, bool> latex = encoding.latexChar(c);
1302                 docstring nextlatex;
1303                 bool nexttipas = false;
1304                 string nexttipashortcut;
1305                 if (next != '\0' && next != META_INSET && encoding.encodable(next)) {
1306                         nextlatex = encoding.latexChar(next).first;
1307                         if (runparams.inIPA) {
1308                                 nexttipashortcut = Encodings::TIPAShortcut(next);
1309                                 nexttipas = !nexttipashortcut.empty();
1310                         }
1311                 }
1312                 bool tipas = false;
1313                 if (runparams.inIPA) {
1314                         string const tipashortcut = Encodings::TIPAShortcut(c);
1315                         if (!tipashortcut.empty()) {
1316                                 latex.first = from_ascii(tipashortcut);
1317                                 latex.second = false;
1318                                 tipas = true;
1319                         }
1320                 }
1321                 if (Encodings::isKnownScriptChar(c, script)
1322                     && prefixIs(latex.first, from_ascii("\\" + script)))
1323                         column += writeScriptChars(os, latex.first,
1324                                         running_change, encoding, i) - 1;
1325                 else if (latex.second
1326                          && ((!prefixIs(nextlatex, '\\')
1327                                && !prefixIs(nextlatex, '{')
1328                                && !prefixIs(nextlatex, '}'))
1329                              || (nexttipas
1330                                  && !prefixIs(from_ascii(nexttipashortcut), '\\')))
1331                          && !tipas) {
1332                         // Prevent eating of a following
1333                         // space or command corruption by
1334                         // following characters
1335                         if (next == ' ' || next == '\0') {
1336                                 column += latex.first.length() + 1;
1337                                 os << latex.first << "{}";
1338                         } else {
1339                                 column += latex.first.length();
1340                                 os << latex.first << " ";
1341                         }
1342                 } else {
1343                         column += latex.first.length() - 1;
1344                         os << latex.first;
1345                 }
1346                 break;
1347         }
1348 }
1349
1350
1351 bool Paragraph::Private::latexSpecialT1(char_type const c, otexstream & os,
1352         pos_type i, unsigned int & column)
1353 {
1354         switch (c) {
1355         case '>':
1356         case '<':
1357                 os.put(c);
1358                 // In T1 encoding, these characters exist
1359                 // but we should avoid ligatures
1360                 if (i + 1 >= int(text_.size()) || text_[i + 1] != c)
1361                         return true;
1362                 os << "\\textcompwordmark{}";
1363                 column += 19;
1364                 return true;
1365         case '|':
1366                 os.put(c);
1367                 return true;
1368         case '\"':
1369                 // soul.sty breaks with \char`\"
1370                 os << "\\textquotedbl{}";
1371                 column += 14;
1372                 return true;
1373         default:
1374                 return false;
1375         }
1376 }
1377
1378
1379 bool Paragraph::Private::latexSpecialT3(char_type const c, otexstream & os,
1380         pos_type /*i*/, unsigned int & column)
1381 {
1382         switch (c) {
1383         case '*':
1384         case '[':
1385         case ']':
1386         case '\"':
1387                 os.put(c);
1388                 return true;
1389         case '|':
1390                 os << "\\textvertline{}";
1391                 column += 14;
1392                 return true;
1393         default:
1394                 return false;
1395         }
1396 }
1397
1398
1399 bool Paragraph::Private::latexSpecialTypewriter(char_type const c, otexstream & os,
1400         pos_type i, unsigned int & column)
1401 {
1402         switch (c) {
1403         case '-':
1404                 // within \ttfamily, "--" is merged to "-" (no endash)
1405                 // so we avoid this rather irritating ligature
1406                 if (i + 1 < int(text_.size()) && text_[i + 1] == '-') {
1407                         os << "-{}";
1408                         column += 2;
1409                 } else
1410                         os << '-';
1411                 return true;
1412
1413         // everything else has to be checked separately
1414         // (depending on the encoding)
1415         default:
1416                 return false;
1417         }
1418 }
1419
1420
1421 /// \param end_pos
1422 ///   If [start_pos, end_pos) does not include entirely the special phrase, then
1423 ///   do not apply the macro transformation.
1424 bool Paragraph::Private::latexSpecialPhrase(otexstream & os, pos_type & i, pos_type end_pos,
1425         unsigned int & column, OutputParams const & runparams)
1426 {
1427         // FIXME: if we have "LaTeX" with a font
1428         // change in the middle (before the 'T', then
1429         // the "TeX" part is still special cased.
1430         // Really we should only operate this on
1431         // "words" for some definition of word
1432
1433         for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
1434                 if (!isTextAt(special_phrases[pnr].phrase, i)
1435                     || (end_pos != -1 && i + int(special_phrases[pnr].phrase.size()) > end_pos))
1436                         continue;
1437                 if (runparams.moving_arg)
1438                         os << "\\protect";
1439                 os << special_phrases[pnr].macro;
1440                 i += special_phrases[pnr].phrase.length() - 1;
1441                 column += special_phrases[pnr].macro.length() - 1;
1442                 return true;
1443         }
1444         return false;
1445 }
1446
1447
1448 void Paragraph::Private::validate(LaTeXFeatures & features) const
1449 {
1450         if (layout_->inpreamble && inset_owner_) {
1451                 bool const is_command = layout_->latextype == LATEX_COMMAND;
1452                 Buffer const & buf = inset_owner_->buffer();
1453                 BufferParams const & bp = features.runparams().is_child
1454                         ? buf.masterParams() : buf.params();
1455                 Font f;
1456                 TexRow texrow;
1457                 // Using a string stream here circumvents the encoding
1458                 // switching machinery of odocstream. Therefore the
1459                 // output is wrong if this paragraph contains content
1460                 // that needs to switch encoding.
1461                 odocstringstream ods;
1462                 otexstream os(ods, texrow);
1463                 if (is_command) {
1464                         os << '\\' << from_ascii(layout_->latexname());
1465                         // we have to provide all the optional arguments here, even though
1466                         // the last one is the only one we care about.
1467                         // Separate handling of optional argument inset.
1468                         if (!layout_->latexargs().empty()) {
1469                                 OutputParams rp = features.runparams();
1470                                 rp.local_font = &owner_->getFirstFontSettings(bp);
1471                                 latexArgInsets(*owner_, os, rp, layout_->latexargs());
1472                         }
1473                         os << from_ascii(layout_->latexparam());
1474                 }
1475                 docstring::size_type const length = ods.str().length();
1476                 // this will output "{" at the beginning, but not at the end
1477                 owner_->latex(bp, f, os, features.runparams(), 0, -1, true);
1478                 if (ods.str().length() > length) {
1479                         if (is_command) {
1480                                 ods << '}';
1481                                 if (!layout_->postcommandargs().empty()) {
1482                                         OutputParams rp = features.runparams();
1483                                         rp.local_font = &owner_->getFirstFontSettings(bp);
1484                                         latexArgInsets(*owner_, os, rp, layout_->postcommandargs(), "post:");
1485                                 }
1486                         }
1487                         string const snippet = to_utf8(ods.str());
1488                         features.addPreambleSnippet(snippet);
1489                 }
1490         }
1491
1492         if (features.runparams().flavor == OutputParams::HTML
1493             && layout_->htmltitle()) {
1494                 features.setHTMLTitle(owner_->asString(AS_STR_INSETS | AS_STR_SKIPDELETE));
1495         }
1496
1497         // check the params.
1498         if (!params_.spacing().isDefault())
1499                 features.require("setspace");
1500
1501         // then the layouts
1502         features.useLayout(layout_->name());
1503
1504         // then the fonts
1505         fontlist_.validate(features);
1506
1507         // then the indentation
1508         if (!params_.leftIndent().zero())
1509                 features.require("ParagraphLeftIndent");
1510
1511         // then the insets
1512         InsetList::const_iterator icit = insetlist_.begin();
1513         InsetList::const_iterator iend = insetlist_.end();
1514         for (; icit != iend; ++icit) {
1515                 if (icit->inset) {
1516                         icit->inset->validate(features);
1517                         if (layout_->needprotect &&
1518                             icit->inset->lyxCode() == FOOT_CODE)
1519                                 features.require("NeedLyXFootnoteCode");
1520                 }
1521         }
1522
1523         // then the contents
1524         for (pos_type i = 0; i < int(text_.size()) ; ++i) {
1525                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
1526                         if (!special_phrases[pnr].builtin
1527                             && isTextAt(special_phrases[pnr].phrase, i)) {
1528                                 features.require(special_phrases[pnr].phrase);
1529                                 break;
1530                         }
1531                 }
1532                 BufferEncodings::validate(text_[i], features);
1533         }
1534 }
1535
1536 /////////////////////////////////////////////////////////////////////
1537 //
1538 // Paragraph
1539 //
1540 /////////////////////////////////////////////////////////////////////
1541
1542 namespace {
1543         Layout const emptyParagraphLayout;
1544 }
1545
1546 Paragraph::Paragraph()
1547         : d(new Paragraph::Private(this, emptyParagraphLayout))
1548 {
1549         itemdepth = 0;
1550         d->params_.clear();
1551 }
1552
1553
1554 Paragraph::Paragraph(Paragraph const & par)
1555         : itemdepth(par.itemdepth),
1556         d(new Paragraph::Private(*par.d, this))
1557 {
1558         registerWords();
1559 }
1560
1561
1562 Paragraph::Paragraph(Paragraph const & par, pos_type beg, pos_type end)
1563         : itemdepth(par.itemdepth),
1564         d(new Paragraph::Private(*par.d, this, beg, end))
1565 {
1566         registerWords();
1567 }
1568
1569
1570 Paragraph & Paragraph::operator=(Paragraph const & par)
1571 {
1572         // needed as we will destroy the private part before copying it
1573         if (&par != this) {
1574                 itemdepth = par.itemdepth;
1575
1576                 deregisterWords();
1577                 delete d;
1578                 d = new Private(*par.d, this);
1579                 registerWords();
1580         }
1581         return *this;
1582 }
1583
1584
1585 Paragraph::~Paragraph()
1586 {
1587         deregisterWords();
1588         delete d;
1589 }
1590
1591
1592 namespace {
1593
1594 // this shall be called just before every "os << ..." action.
1595 void flushString(ostream & os, docstring & s)
1596 {
1597         os << to_utf8(s);
1598         s.erase();
1599 }
1600
1601 }
1602
1603
1604 void Paragraph::write(ostream & os, BufferParams const & bparams,
1605         depth_type & dth) const
1606 {
1607         // The beginning or end of a deeper (i.e. nested) area?
1608         if (dth != d->params_.depth()) {
1609                 if (d->params_.depth() > dth) {
1610                         while (d->params_.depth() > dth) {
1611                                 os << "\n\\begin_deeper";
1612                                 ++dth;
1613                         }
1614                 } else {
1615                         while (d->params_.depth() < dth) {
1616                                 os << "\n\\end_deeper";
1617                                 --dth;
1618                         }
1619                 }
1620         }
1621
1622         // First write the layout
1623         os << "\n\\begin_layout " << to_utf8(d->layout_->name()) << '\n';
1624
1625         d->params_.write(os);
1626
1627         Font font1(inherit_font, bparams.language);
1628
1629         Change running_change = Change(Change::UNCHANGED);
1630
1631         // this string is used as a buffer to avoid repetitive calls
1632         // to to_utf8(), which turn out to be expensive (JMarc)
1633         docstring write_buffer;
1634
1635         int column = 0;
1636         for (pos_type i = 0; i <= size(); ++i) {
1637
1638                 Change const change = lookupChange(i);
1639                 if (change != running_change)
1640                         flushString(os, write_buffer);
1641                 Changes::lyxMarkChange(os, bparams, column, running_change, change);
1642                 running_change = change;
1643
1644                 if (i == size())
1645                         break;
1646
1647                 // Write font changes
1648                 Font font2 = getFontSettings(bparams, i);
1649                 if (font2 != font1) {
1650                         flushString(os, write_buffer);
1651                         font2.lyxWriteChanges(font1, os);
1652                         column = 0;
1653                         font1 = font2;
1654                 }
1655
1656                 char_type const c = d->text_[i];
1657                 switch (c) {
1658                 case META_INSET:
1659                         if (Inset const * inset = getInset(i)) {
1660                                 flushString(os, write_buffer);
1661                                 if (inset->directWrite()) {
1662                                         // international char, let it write
1663                                         // code directly so it's shorter in
1664                                         // the file
1665                                         inset->write(os);
1666                                 } else {
1667                                         if (i)
1668                                                 os << '\n';
1669                                         os << "\\begin_inset ";
1670                                         inset->write(os);
1671                                         os << "\n\\end_inset\n\n";
1672                                         column = 0;
1673                                 }
1674                         }
1675                         break;
1676                 case '\\':
1677                         flushString(os, write_buffer);
1678                         os << "\n\\backslash\n";
1679                         column = 0;
1680                         break;
1681                 case '.':
1682                         flushString(os, write_buffer);
1683                         if (i + 1 < size() && d->text_[i + 1] == ' ') {
1684                                 os << ".\n";
1685                                 column = 0;
1686                         } else
1687                                 os << '.';
1688                         break;
1689                 default:
1690                         if ((column > 70 && c == ' ')
1691                             || column > 79) {
1692                                 flushString(os, write_buffer);
1693                                 os << '\n';
1694                                 column = 0;
1695                         }
1696                         // this check is to amend a bug. LyX sometimes
1697                         // inserts '\0' this could cause problems.
1698                         if (c != '\0')
1699                                 write_buffer.push_back(c);
1700                         else
1701                                 LYXERR0("NUL char in structure.");
1702                         ++column;
1703                         break;
1704                 }
1705         }
1706
1707         flushString(os, write_buffer);
1708         os << "\n\\end_layout\n";
1709 }
1710
1711
1712 void Paragraph::validate(LaTeXFeatures & features) const
1713 {
1714         d->validate(features);
1715 }
1716
1717
1718 void Paragraph::insert(pos_type start, docstring const & str,
1719                        Font const & font, Change const & change)
1720 {
1721         for (size_t i = 0, n = str.size(); i != n ; ++i)
1722                 insertChar(start + i, str[i], font, change);
1723 }
1724
1725
1726 void Paragraph::appendChar(char_type c, Font const & font,
1727                 Change const & change)
1728 {
1729         // track change
1730         d->changes_.insert(change, d->text_.size());
1731         // when appending characters, no need to update tables
1732         d->text_.push_back(c);
1733         setFont(d->text_.size() - 1, font);
1734         d->requestSpellCheck(d->text_.size() - 1);
1735 }
1736
1737
1738 void Paragraph::appendString(docstring const & s, Font const & font,
1739                 Change const & change)
1740 {
1741         pos_type end = s.size();
1742         size_t oldsize = d->text_.size();
1743         size_t newsize = oldsize + end;
1744         size_t capacity = d->text_.capacity();
1745         if (newsize >= capacity)
1746                 d->text_.reserve(max(capacity + 100, newsize));
1747
1748         // when appending characters, no need to update tables
1749         d->text_.append(s);
1750
1751         // FIXME: Optimize this!
1752         for (size_t i = oldsize; i != newsize; ++i) {
1753                 // track change
1754                 d->changes_.insert(change, i);
1755                 d->requestSpellCheck(i);
1756         }
1757         d->fontlist_.set(oldsize, font);
1758         d->fontlist_.set(newsize - 1, font);
1759 }
1760
1761
1762 void Paragraph::insertChar(pos_type pos, char_type c,
1763                            bool trackChanges)
1764 {
1765         d->insertChar(pos, c, Change(trackChanges ?
1766                            Change::INSERTED : Change::UNCHANGED));
1767 }
1768
1769
1770 void Paragraph::insertChar(pos_type pos, char_type c,
1771                            Font const & font, bool trackChanges)
1772 {
1773         d->insertChar(pos, c, Change(trackChanges ?
1774                            Change::INSERTED : Change::UNCHANGED));
1775         setFont(pos, font);
1776 }
1777
1778
1779 void Paragraph::insertChar(pos_type pos, char_type c,
1780                            Font const & font, Change const & change)
1781 {
1782         d->insertChar(pos, c, change);
1783         setFont(pos, font);
1784 }
1785
1786
1787 void Paragraph::resetFonts(Font const & font)
1788 {
1789         d->fontlist_.clear();
1790         d->fontlist_.set(0, font);
1791         d->fontlist_.set(d->text_.size() - 1, font);
1792 }
1793
1794 // Gets uninstantiated font setting at position.
1795 Font const & Paragraph::getFontSettings(BufferParams const & bparams,
1796                                          pos_type pos) const
1797 {
1798         if (pos > size()) {
1799                 LYXERR0("pos: " << pos << " size: " << size());
1800                 LBUFERR(false);
1801         }
1802
1803         FontList::const_iterator cit = d->fontlist_.fontIterator(pos);
1804         if (cit != d->fontlist_.end())
1805                 return cit->font();
1806
1807         if (pos == size() && !empty())
1808                 return getFontSettings(bparams, pos - 1);
1809
1810         // Optimisation: avoid a full font instantiation if there is no
1811         // language change from previous call.
1812         static Font previous_font;
1813         static Language const * previous_lang = 0;
1814         Language const * lang = getParLanguage(bparams);
1815         if (lang != previous_lang) {
1816                 previous_lang = lang;
1817                 previous_font = Font(inherit_font, lang);
1818         }
1819         return previous_font;
1820 }
1821
1822
1823 FontSpan Paragraph::fontSpan(pos_type pos) const
1824 {
1825         LBUFERR(pos < size());
1826
1827         pos_type start = 0;
1828         FontList::const_iterator cit = d->fontlist_.begin();
1829         FontList::const_iterator end = d->fontlist_.end();
1830         for (; cit != end; ++cit) {
1831                 if (cit->pos() >= pos) {
1832                         if (pos >= beginOfBody())
1833                                 return FontSpan(max(start, beginOfBody()),
1834                                                 cit->pos());
1835                         else
1836                                 return FontSpan(start,
1837                                                 min(beginOfBody() - 1,
1838                                                          cit->pos()));
1839                 }
1840                 start = cit->pos() + 1;
1841         }
1842
1843         // This should not happen, but if so, we take no chances.
1844         LYXERR0("Paragraph::fontSpan: position not found in fontinfo table!");
1845         LASSERT(false, return FontSpan(pos, pos));
1846 }
1847
1848
1849 // Gets uninstantiated font setting at position 0
1850 Font const & Paragraph::getFirstFontSettings(BufferParams const & bparams) const
1851 {
1852         if (!empty() && !d->fontlist_.empty())
1853                 return d->fontlist_.begin()->font();
1854
1855         // Optimisation: avoid a full font instantiation if there is no
1856         // language change from previous call.
1857         static Font previous_font;
1858         static Language const * previous_lang = 0;
1859         if (bparams.language != previous_lang) {
1860                 previous_lang = bparams.language;
1861                 previous_font = Font(inherit_font, bparams.language);
1862         }
1863
1864         return previous_font;
1865 }
1866
1867
1868 // Gets the fully instantiated font at a given position in a paragraph
1869 // This is basically the same function as Text::GetFont() in text2.cpp.
1870 // The difference is that this one is used for generating the LaTeX file,
1871 // and thus cosmetic "improvements" are disallowed: This has to deliver
1872 // the true picture of the buffer. (Asger)
1873 Font const Paragraph::getFont(BufferParams const & bparams, pos_type pos,
1874                                  Font const & outerfont) const
1875 {
1876         LBUFERR(pos >= 0);
1877
1878         Font font = getFontSettings(bparams, pos);
1879
1880         pos_type const body_pos = beginOfBody();
1881         FontInfo & fi = font.fontInfo();
1882         if (pos < body_pos)
1883                 fi.realize(d->layout_->labelfont);
1884         else
1885                 fi.realize(d->layout_->font);
1886
1887         fi.realize(outerfont.fontInfo());
1888         fi.realize(bparams.getFont().fontInfo());
1889
1890         return font;
1891 }
1892
1893
1894 Font const Paragraph::getLabelFont
1895         (BufferParams const & bparams, Font const & outerfont) const
1896 {
1897         FontInfo tmpfont = d->layout_->labelfont;
1898         tmpfont.realize(outerfont.fontInfo());
1899         tmpfont.realize(bparams.getFont().fontInfo());
1900         return Font(tmpfont, getParLanguage(bparams));
1901 }
1902
1903
1904 Font const Paragraph::getLayoutFont
1905         (BufferParams const & bparams, Font const & outerfont) const
1906 {
1907         FontInfo tmpfont = d->layout_->font;
1908         tmpfont.realize(outerfont.fontInfo());
1909         tmpfont.realize(bparams.getFont().fontInfo());
1910         return Font(tmpfont, getParLanguage(bparams));
1911 }
1912
1913
1914 /// Returns the height of the highest font in range
1915 FontSize Paragraph::highestFontInRange
1916         (pos_type startpos, pos_type endpos, FontSize def_size) const
1917 {
1918         return d->fontlist_.highestInRange(startpos, endpos, def_size);
1919 }
1920
1921
1922 char_type Paragraph::getUChar(BufferParams const & bparams, pos_type pos) const
1923 {
1924         char_type c = d->text_[pos];
1925         if (!lyxrc.rtl_support || !getFontSettings(bparams, pos).isRightToLeft())
1926                 return c;
1927
1928         // FIXME: The arabic special casing is due to the difference of arabic
1929         // round brackets input introduced in r18599. Check if this should be
1930         // unified with Hebrew or at least if all bracket types should be
1931         // handled the same (file format change in either case).
1932         string const & lang = getFontSettings(bparams, pos).language()->lang();
1933         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi"
1934                 || lang == "farsi";
1935         char_type uc = c;
1936         switch (c) {
1937         case '(':
1938                 uc = arabic ? c : ')';
1939                 break;
1940         case ')':
1941                 uc = arabic ? c : '(';
1942                 break;
1943         case '[':
1944                 uc = ']';
1945                 break;
1946         case ']':
1947                 uc = '[';
1948                 break;
1949         case '{':
1950                 uc = '}';
1951                 break;
1952         case '}':
1953                 uc = '{';
1954                 break;
1955         case '<':
1956                 uc = '>';
1957                 break;
1958         case '>':
1959                 uc = '<';
1960                 break;
1961         }
1962
1963         return uc;
1964 }
1965
1966
1967 void Paragraph::setFont(pos_type pos, Font const & font)
1968 {
1969         LASSERT(pos <= size(), return);
1970
1971         // First, reduce font against layout/label font
1972         // Update: The setCharFont() routine in text2.cpp already
1973         // reduces font, so we don't need to do that here. (Asger)
1974
1975         d->fontlist_.set(pos, font);
1976 }
1977
1978
1979 void Paragraph::makeSameLayout(Paragraph const & par)
1980 {
1981         d->layout_ = par.d->layout_;
1982         d->params_ = par.d->params_;
1983 }
1984
1985
1986 bool Paragraph::stripLeadingSpaces(bool trackChanges)
1987 {
1988         if (isFreeSpacing())
1989                 return false;
1990
1991         int pos = 0;
1992         int count = 0;
1993
1994         while (pos < size() && (isNewline(pos) || isLineSeparator(pos))) {
1995                 if (eraseChar(pos, trackChanges))
1996                         ++count;
1997                 else
1998                         ++pos;
1999         }
2000
2001         return count > 0 || pos > 0;
2002 }
2003
2004
2005 bool Paragraph::hasSameLayout(Paragraph const & par) const
2006 {
2007         return par.d->layout_ == d->layout_
2008                 && d->params_.sameLayout(par.d->params_);
2009 }
2010
2011
2012 depth_type Paragraph::getDepth() const
2013 {
2014         return d->params_.depth();
2015 }
2016
2017
2018 depth_type Paragraph::getMaxDepthAfter() const
2019 {
2020         if (d->layout_->isEnvironment())
2021                 return d->params_.depth() + 1;
2022         else
2023                 return d->params_.depth();
2024 }
2025
2026
2027 char Paragraph::getAlign() const
2028 {
2029         if (d->params_.align() == LYX_ALIGN_LAYOUT)
2030                 return d->layout_->align;
2031         else
2032                 return d->params_.align();
2033 }
2034
2035
2036 docstring const & Paragraph::labelString() const
2037 {
2038         return d->params_.labelString();
2039 }
2040
2041
2042 // the next two functions are for the manual labels
2043 docstring const Paragraph::getLabelWidthString() const
2044 {
2045         if (d->layout_->margintype == MARGIN_MANUAL
2046             || d->layout_->latextype == LATEX_BIB_ENVIRONMENT)
2047                 return d->params_.labelWidthString();
2048         else
2049                 return _("Senseless with this layout!");
2050 }
2051
2052
2053 void Paragraph::setLabelWidthString(docstring const & s)
2054 {
2055         d->params_.labelWidthString(s);
2056 }
2057
2058
2059 docstring Paragraph::expandLabel(Layout const & layout,
2060                 BufferParams const & bparams) const
2061 {
2062         return expandParagraphLabel(layout, bparams, true);
2063 }
2064
2065
2066 docstring Paragraph::expandDocBookLabel(Layout const & layout,
2067                 BufferParams const & bparams) const
2068 {
2069         return expandParagraphLabel(layout, bparams, false);
2070 }
2071
2072
2073 docstring Paragraph::expandParagraphLabel(Layout const & layout,
2074                 BufferParams const & bparams, bool process_appendix) const
2075 {
2076         DocumentClass const & tclass = bparams.documentClass();
2077         string const & lang = getParLanguage(bparams)->code();
2078         bool const in_appendix = process_appendix && d->params_.appendix();
2079         docstring fmt = translateIfPossible(layout.labelstring(in_appendix), lang);
2080
2081         if (fmt.empty() && !layout.counter.empty())
2082                 return tclass.counters().theCounter(layout.counter, lang);
2083
2084         // handle 'inherited level parts' in 'fmt',
2085         // i.e. the stuff between '@' in   '@Section@.\arabic{subsection}'
2086         size_t const i = fmt.find('@', 0);
2087         if (i != docstring::npos) {
2088                 size_t const j = fmt.find('@', i + 1);
2089                 if (j != docstring::npos) {
2090                         docstring parent(fmt, i + 1, j - i - 1);
2091                         docstring label = from_ascii("??");
2092                         if (tclass.hasLayout(parent))
2093                                 docstring label = expandParagraphLabel(tclass[parent], bparams,
2094                                                       process_appendix);
2095                         fmt = docstring(fmt, 0, i) + label
2096                                 + docstring(fmt, j + 1, docstring::npos);
2097                 }
2098         }
2099
2100         return tclass.counters().counterLabel(fmt, lang);
2101 }
2102
2103
2104 void Paragraph::applyLayout(Layout const & new_layout)
2105 {
2106         d->layout_ = &new_layout;
2107         LyXAlignment const oldAlign = d->params_.align();
2108
2109         if (!(oldAlign & d->layout_->alignpossible)) {
2110                 frontend::Alert::warning(_("Alignment not permitted"),
2111                         _("The new layout does not permit the alignment previously used.\nSetting to default."));
2112                 d->params_.align(LYX_ALIGN_LAYOUT);
2113         }
2114 }
2115
2116
2117 pos_type Paragraph::beginOfBody() const
2118 {
2119         return d->begin_of_body_;
2120 }
2121
2122
2123 void Paragraph::setBeginOfBody()
2124 {
2125         if (d->layout_->labeltype != LABEL_MANUAL) {
2126                 d->begin_of_body_ = 0;
2127                 return;
2128         }
2129
2130         // Unroll the first two cycles of the loop
2131         // and remember the previous character to
2132         // remove unnecessary getChar() calls
2133         pos_type i = 0;
2134         pos_type end = size();
2135         if (i < end && !isNewline(i)) {
2136                 ++i;
2137                 char_type previous_char = 0;
2138                 char_type temp = 0;
2139                 if (i < end) {
2140                         previous_char = d->text_[i];
2141                         if (!isNewline(i)) {
2142                                 ++i;
2143                                 while (i < end && previous_char != ' ') {
2144                                         temp = d->text_[i];
2145                                         if (isNewline(i))
2146                                                 break;
2147                                         ++i;
2148                                         previous_char = temp;
2149                                 }
2150                         }
2151                 }
2152         }
2153
2154         d->begin_of_body_ = i;
2155 }
2156
2157
2158 bool Paragraph::allowParagraphCustomization() const
2159 {
2160         return inInset().allowParagraphCustomization();
2161 }
2162
2163
2164 bool Paragraph::usePlainLayout() const
2165 {
2166         return inInset().usePlainLayout();
2167 }
2168
2169
2170 bool Paragraph::isPassThru() const
2171 {
2172         return inInset().isPassThru() || d->layout_->pass_thru;
2173 }
2174
2175 namespace {
2176
2177 // paragraphs inside floats need different alignment tags to avoid
2178 // unwanted space
2179
2180 bool noTrivlistCentering(InsetCode code)
2181 {
2182         return code == FLOAT_CODE
2183                || code == WRAP_CODE
2184                || code == CELL_CODE;
2185 }
2186
2187
2188 string correction(string const & orig)
2189 {
2190         if (orig == "flushleft")
2191                 return "raggedright";
2192         if (orig == "flushright")
2193                 return "raggedleft";
2194         if (orig == "center")
2195                 return "centering";
2196         return orig;
2197 }
2198
2199
2200 string const corrected_env(string const & suffix, string const & env,
2201         InsetCode code, bool const lastpar)
2202 {
2203         string output = suffix + "{";
2204         if (noTrivlistCentering(code)) {
2205                 if (lastpar) {
2206                         // the last paragraph in non-trivlist-aligned
2207                         // context is special (to avoid unwanted whitespace)
2208                         if (suffix == "\\begin")
2209                                 return "\\" + correction(env) + "{}";
2210                         return string();
2211                 }
2212                 output += correction(env);
2213         } else
2214                 output += env;
2215         output += "}";
2216         if (suffix == "\\begin")
2217                 output += "\n";
2218         return output;
2219 }
2220
2221
2222 void adjust_column(string const & str, int & column)
2223 {
2224         if (!contains(str, "\n"))
2225                 column += str.size();
2226         else {
2227                 string tmp;
2228                 column = rsplit(str, tmp, '\n').size();
2229         }
2230 }
2231
2232 } // namespace anon
2233
2234
2235 int Paragraph::Private::startTeXParParams(BufferParams const & bparams,
2236                         otexstream & os, OutputParams const & runparams) const
2237 {
2238         int column = 0;
2239
2240         if (params_.noindent() && !layout_->pass_thru) {
2241                 os << "\\noindent ";
2242                 column += 10;
2243         }
2244
2245         LyXAlignment const curAlign = params_.align();
2246
2247         if (curAlign == layout_->align)
2248                 return column;
2249
2250         switch (curAlign) {
2251         case LYX_ALIGN_NONE:
2252         case LYX_ALIGN_BLOCK:
2253         case LYX_ALIGN_LAYOUT:
2254         case LYX_ALIGN_SPECIAL:
2255         case LYX_ALIGN_DECIMAL:
2256                 break;
2257         case LYX_ALIGN_LEFT:
2258         case LYX_ALIGN_RIGHT:
2259         case LYX_ALIGN_CENTER:
2260                 if (runparams.moving_arg) {
2261                         os << "\\protect";
2262                         column += 8;
2263                 }
2264                 break;
2265         }
2266
2267         string const begin_tag = "\\begin";
2268         InsetCode code = ownerCode();
2269         bool const lastpar = runparams.isLastPar;
2270
2271         switch (curAlign) {
2272         case LYX_ALIGN_NONE:
2273         case LYX_ALIGN_BLOCK:
2274         case LYX_ALIGN_LAYOUT:
2275         case LYX_ALIGN_SPECIAL:
2276         case LYX_ALIGN_DECIMAL:
2277                 break;
2278         case LYX_ALIGN_LEFT: {
2279                 string output;
2280                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2281                         output = corrected_env(begin_tag, "flushleft", code, lastpar);
2282                 else
2283                         output = corrected_env(begin_tag, "flushright", code, lastpar);
2284                 os << from_ascii(output);
2285                 adjust_column(output, column);
2286                 break;
2287         } case LYX_ALIGN_RIGHT: {
2288                 string output;
2289                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2290                         output = corrected_env(begin_tag, "flushright", code, lastpar);
2291                 else
2292                         output = corrected_env(begin_tag, "flushleft", code, lastpar);
2293                 os << from_ascii(output);
2294                 adjust_column(output, column);
2295                 break;
2296         } case LYX_ALIGN_CENTER: {
2297                 string output;
2298                 output = corrected_env(begin_tag, "center", code, lastpar);
2299                 os << from_ascii(output);
2300                 adjust_column(output, column);
2301                 break;
2302         }
2303         }
2304
2305         return column;
2306 }
2307
2308
2309 bool Paragraph::Private::endTeXParParams(BufferParams const & bparams,
2310                         otexstream & os, OutputParams const & runparams) const
2311 {
2312         LyXAlignment const curAlign = params_.align();
2313
2314         if (curAlign == layout_->align)
2315                 return false;
2316
2317         switch (curAlign) {
2318         case LYX_ALIGN_NONE:
2319         case LYX_ALIGN_BLOCK:
2320         case LYX_ALIGN_LAYOUT:
2321         case LYX_ALIGN_SPECIAL:
2322         case LYX_ALIGN_DECIMAL:
2323                 break;
2324         case LYX_ALIGN_LEFT:
2325         case LYX_ALIGN_RIGHT:
2326         case LYX_ALIGN_CENTER:
2327                 if (runparams.moving_arg)
2328                         os << "\\protect";
2329                 break;
2330         }
2331
2332         string output;
2333         string const end_tag = "\n\\par\\end";
2334         InsetCode code = ownerCode();
2335         bool const lastpar = runparams.isLastPar;
2336
2337         switch (curAlign) {
2338         case LYX_ALIGN_NONE:
2339         case LYX_ALIGN_BLOCK:
2340         case LYX_ALIGN_LAYOUT:
2341         case LYX_ALIGN_SPECIAL:
2342         case LYX_ALIGN_DECIMAL:
2343                 break;
2344         case LYX_ALIGN_LEFT: {
2345                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2346                         output = corrected_env(end_tag, "flushleft", code, lastpar);
2347                 else
2348                         output = corrected_env(end_tag, "flushright", code, lastpar);
2349                 os << from_ascii(output);
2350                 break;
2351         } case LYX_ALIGN_RIGHT: {
2352                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2353                         output = corrected_env(end_tag, "flushright", code, lastpar);
2354                 else
2355                         output = corrected_env(end_tag, "flushleft", code, lastpar);
2356                 os << from_ascii(output);
2357                 break;
2358         } case LYX_ALIGN_CENTER: {
2359                 output = corrected_env(end_tag, "center", code, lastpar);
2360                 os << from_ascii(output);
2361                 break;
2362         }
2363         }
2364
2365         return !output.empty() || lastpar;
2366 }
2367
2368
2369 // This one spits out the text of the paragraph
2370 void Paragraph::latex(BufferParams const & bparams,
2371         Font const & outerfont,
2372         otexstream & os,
2373         OutputParams const & runparams,
2374         int start_pos, int end_pos, bool force) const
2375 {
2376         LYXERR(Debug::LATEX, "Paragraph::latex...     " << this);
2377
2378         // FIXME This check should not be needed. Perhaps issue an
2379         // error if it triggers.
2380         Layout const & style = inInset().forcePlainLayout() ?
2381                 bparams.documentClass().plainLayout() : *d->layout_;
2382
2383         if (!force && style.inpreamble)
2384                 return;
2385
2386         bool const allowcust = allowParagraphCustomization();
2387
2388         // Current base font for all inherited font changes, without any
2389         // change caused by an individual character, except for the language:
2390         // It is set to the language of the first character.
2391         // As long as we are in the label, this font is the base font of the
2392         // label. Before the first body character it is set to the base font
2393         // of the body.
2394         Font basefont;
2395
2396         // Maybe we have to create a optional argument.
2397         pos_type body_pos = beginOfBody();
2398         unsigned int column = 0;
2399
2400         if (body_pos > 0) {
2401                 // the optional argument is kept in curly brackets in
2402                 // case it contains a ']'
2403                 // This is not strictly needed, but if this is changed it
2404                 // would be a file format change, and tex2lyx would need
2405                 // to be adjusted, since it unconditionally removes the
2406                 // braces when it parses \item.
2407                 os << "[{";
2408                 column += 2;
2409                 basefont = getLabelFont(bparams, outerfont);
2410         } else {
2411                 basefont = getLayoutFont(bparams, outerfont);
2412         }
2413
2414         // Which font is currently active?
2415         Font running_font(basefont);
2416         // Do we have an open font change?
2417         bool open_font = false;
2418
2419         Change runningChange = Change(Change::UNCHANGED);
2420
2421         Encoding const * const prev_encoding = runparams.encoding;
2422
2423         os.texrow().start(id(), 0);
2424
2425         // if the paragraph is empty, the loop will not be entered at all
2426         if (empty()) {
2427                 if (style.isCommand()) {
2428                         os << '{';
2429                         ++column;
2430                 }
2431                 if (!style.leftdelim().empty()) {
2432                         os << style.leftdelim();
2433                         column += style.leftdelim().size();
2434                 }
2435                 if (allowcust)
2436                         column += d->startTeXParParams(bparams, os, runparams);
2437         }
2438
2439         for (pos_type i = 0; i < size(); ++i) {
2440                 // First char in paragraph or after label?
2441                 if (i == body_pos) {
2442                         if (body_pos > 0) {
2443                                 if (open_font) {
2444                                         column += running_font.latexWriteEndChanges(
2445                                                 os, bparams, runparams,
2446                                                 basefont, basefont);
2447                                         open_font = false;
2448                                 }
2449                                 basefont = getLayoutFont(bparams, outerfont);
2450                                 running_font = basefont;
2451
2452                                 column += Changes::latexMarkChange(os, bparams,
2453                                                 runningChange, Change(Change::UNCHANGED),
2454                                                 runparams);
2455                                 runningChange = Change(Change::UNCHANGED);
2456
2457                                 os << "}] ";
2458                                 column +=3;
2459                         }
2460                         if (style.isCommand()) {
2461                                 os << '{';
2462                                 ++column;
2463                         }
2464
2465                         if (!style.leftdelim().empty()) {
2466                                 os << style.leftdelim();
2467                                 column += style.leftdelim().size();
2468                         }
2469
2470                         if (allowcust)
2471                                 column += d->startTeXParParams(bparams, os,
2472                                                             runparams);
2473                 }
2474
2475                 Change const & change = runparams.inDeletedInset
2476                         ? runparams.changeOfDeletedInset : lookupChange(i);
2477
2478                 if (bparams.outputChanges && runningChange != change) {
2479                         if (open_font) {
2480                                 column += running_font.latexWriteEndChanges(
2481                                                 os, bparams, runparams, basefont, basefont);
2482                                 open_font = false;
2483                         }
2484                         basefont = getLayoutFont(bparams, outerfont);
2485                         running_font = basefont;
2486
2487                         column += Changes::latexMarkChange(os, bparams, runningChange,
2488                                                            change, runparams);
2489                         runningChange = change;
2490                 }
2491
2492                 // do not output text which is marked deleted
2493                 // if change tracking output is disabled
2494                 if (!bparams.outputChanges && change.deleted()) {
2495                         continue;
2496                 }
2497
2498                 ++column;
2499
2500                 // Fully instantiated font
2501                 Font const font = getFont(bparams, i, outerfont);
2502
2503                 Font const last_font = running_font;
2504
2505                 // Do we need to close the previous font?
2506                 if (open_font &&
2507                     (font != running_font ||
2508                      font.language() != running_font.language()))
2509                 {
2510                         column += running_font.latexWriteEndChanges(
2511                                         os, bparams, runparams, basefont,
2512                                         (i == body_pos-1) ? basefont : font);
2513                         running_font = basefont;
2514                         open_font = false;
2515                 }
2516
2517                 string const running_lang = runparams.use_polyglossia ?
2518                         running_font.language()->polyglossia() : running_font.language()->babel();
2519                 // close babel's font environment before opening CJK.
2520                 string const lang_end_command = runparams.use_polyglossia ?
2521                         "\\end{$$lang}" : lyxrc.language_command_end;
2522                 if (!running_lang.empty() &&
2523                     font.language()->encoding()->package() == Encoding::CJK) {
2524                                 string end_tag = subst(lang_end_command,
2525                                                         "$$lang",
2526                                                         running_lang);
2527                                 os << from_ascii(end_tag);
2528                                 column += end_tag.length();
2529                 }
2530
2531                 // Switch file encoding if necessary (and allowed)
2532                 if (!runparams.pass_thru && !style.pass_thru &&
2533                     runparams.encoding->package() != Encoding::none &&
2534                     font.language()->encoding()->package() != Encoding::none) {
2535                         pair<bool, int> const enc_switch =
2536                                 switchEncoding(os.os(), bparams, runparams,
2537                                         *(font.language()->encoding()));
2538                         if (enc_switch.first) {
2539                                 column += enc_switch.second;
2540                                 runparams.encoding = font.language()->encoding();
2541                         }
2542                 }
2543
2544                 char_type const c = d->text_[i];
2545
2546                 // Do we need to change font?
2547                 if ((font != running_font ||
2548                      font.language() != running_font.language()) &&
2549                         i != body_pos - 1)
2550                 {
2551                         odocstringstream ods;
2552                         column += font.latexWriteStartChanges(ods, bparams,
2553                                                               runparams, basefont,
2554                                                               last_font);
2555                         running_font = font;
2556                         open_font = true;
2557                         docstring fontchange = ods.str();
2558                         // check whether the fontchange ends with a \\textcolor
2559                         // modifier and the text starts with a space (bug 4473)
2560                         docstring const last_modifier = rsplit(fontchange, '\\');
2561                         if (prefixIs(last_modifier, from_ascii("textcolor")) && c == ' ')
2562                                 os << fontchange << from_ascii("{}");
2563                         // check if the fontchange ends with a trailing blank
2564                         // (like "\small " (see bug 3382)
2565                         else if (suffixIs(fontchange, ' ') && c == ' ')
2566                                 os << fontchange.substr(0, fontchange.size() - 1)
2567                                    << from_ascii("{}");
2568                         else
2569                                 os << fontchange;
2570                 }
2571
2572                 // FIXME: think about end_pos implementation...
2573                 if (c == ' ' && i >= start_pos && (end_pos == -1 || i < end_pos)) {
2574                         // FIXME: integrate this case in latexSpecialChar
2575                         // Do not print the separation of the optional argument
2576                         // if style.pass_thru is false. This works because
2577                         // latexSpecialChar ignores spaces if
2578                         // style.pass_thru is false.
2579                         if (i != body_pos - 1) {
2580                                 if (d->simpleTeXBlanks(runparams, os,
2581                                                 i, column, font, style)) {
2582                                         // A surrogate pair was output. We
2583                                         // must not call latexSpecialChar
2584                                         // in this iteration, since it would output
2585                                         // the combining character again.
2586                                         ++i;
2587                                         continue;
2588                                 }
2589                         }
2590                 }
2591
2592                 OutputParams rp = runparams;
2593                 rp.free_spacing = style.free_spacing;
2594                 rp.local_font = &font;
2595                 rp.intitle = style.intitle;
2596
2597                 // Two major modes:  LaTeX or plain
2598                 // Handle here those cases common to both modes
2599                 // and then split to handle the two modes separately.
2600                 if (c == META_INSET) {
2601                         if (i >= start_pos && (end_pos == -1 || i < end_pos)) {
2602                                 d->latexInset(bparams, os, rp, running_font,
2603                                                 basefont, outerfont, open_font,
2604                                                 runningChange, style, i, column);
2605                         }
2606                 } else {
2607                         if (i >= start_pos && (end_pos == -1 || i < end_pos)) {
2608                                 try {
2609                                         d->latexSpecialChar(os, bparams, rp, running_font, runningChange,
2610                                                             style, i, end_pos, column);
2611                                 } catch (EncodingException & e) {
2612                                 if (runparams.dryrun) {
2613                                         os << "<" << _("LyX Warning: ")
2614                                            << _("uncodable character") << " '";
2615                                         os.put(c);
2616                                         os << "'>";
2617                                 } else {
2618                                         // add location information and throw again.
2619                                         e.par_id = id();
2620                                         e.pos = i;
2621                                         throw(e);
2622                                 }
2623                         }
2624                 }
2625                 }
2626
2627                 // Set the encoding to that returned from latexSpecialChar (see
2628                 // comment for encoding member in OutputParams.h)
2629                 runparams.encoding = rp.encoding;
2630         }
2631
2632         // If we have an open font definition, we have to close it
2633         if (open_font) {
2634 #ifdef FIXED_LANGUAGE_END_DETECTION
2635                 if (next_) {
2636                         running_font.latexWriteEndChanges(os, bparams,
2637                                         runparams, basefont,
2638                                         next_->getFont(bparams, 0, outerfont));
2639                 } else {
2640                         running_font.latexWriteEndChanges(os, bparams,
2641                                         runparams, basefont, basefont);
2642                 }
2643 #else
2644 //FIXME: For now we ALWAYS have to close the foreign font settings if they are
2645 //FIXME: there as we start another \selectlanguage with the next paragraph if
2646 //FIXME: we are in need of this. This should be fixed sometime (Jug)
2647                 running_font.latexWriteEndChanges(os, bparams, runparams,
2648                                 basefont, basefont);
2649 #endif
2650         }
2651
2652         column += Changes::latexMarkChange(os, bparams, runningChange,
2653                                            Change(Change::UNCHANGED), runparams);
2654
2655         // Needed if there is an optional argument but no contents.
2656         if (body_pos > 0 && body_pos == size()) {
2657                 os << "}]~";
2658         }
2659
2660         if (!style.rightdelim().empty()) {
2661                 os << style.rightdelim();
2662                 column += style.rightdelim().size();
2663         }
2664
2665         if (allowcust && d->endTeXParParams(bparams, os, runparams)
2666             && runparams.encoding != prev_encoding) {
2667                 runparams.encoding = prev_encoding;
2668                 if (!runparams.isFullUnicode())
2669                         os << setEncoding(prev_encoding->iconvName());
2670         }
2671
2672         LYXERR(Debug::LATEX, "Paragraph::latex... done " << this);
2673 }
2674
2675
2676 bool Paragraph::emptyTag() const
2677 {
2678         for (pos_type i = 0; i < size(); ++i) {
2679                 if (Inset const * inset = getInset(i)) {
2680                         InsetCode lyx_code = inset->lyxCode();
2681                         // FIXME testing like that is wrong. What is
2682                         // the intent?
2683                         if (lyx_code != TOC_CODE &&
2684                             lyx_code != INCLUDE_CODE &&
2685                             lyx_code != GRAPHICS_CODE &&
2686                             lyx_code != ERT_CODE &&
2687                             lyx_code != LISTINGS_CODE &&
2688                             lyx_code != FLOAT_CODE &&
2689                             lyx_code != TABULAR_CODE) {
2690                                 return false;
2691                         }
2692                 } else {
2693                         char_type c = d->text_[i];
2694                         if (c != ' ' && c != '\t')
2695                                 return false;
2696                 }
2697         }
2698         return true;
2699 }
2700
2701
2702 string Paragraph::getID(Buffer const & buf, OutputParams const & runparams)
2703         const
2704 {
2705         for (pos_type i = 0; i < size(); ++i) {
2706                 if (Inset const * inset = getInset(i)) {
2707                         InsetCode lyx_code = inset->lyxCode();
2708                         if (lyx_code == LABEL_CODE) {
2709                                 InsetLabel const * const il = static_cast<InsetLabel const *>(inset);
2710                                 docstring const & id = il->getParam("name");
2711                                 return "id='" + to_utf8(sgml::cleanID(buf, runparams, id)) + "'";
2712                         }
2713                 }
2714         }
2715         return string();
2716 }
2717
2718
2719 pos_type Paragraph::firstWordDocBook(odocstream & os, OutputParams const & runparams)
2720         const
2721 {
2722         pos_type i;
2723         for (i = 0; i < size(); ++i) {
2724                 if (Inset const * inset = getInset(i)) {
2725                         inset->docbook(os, runparams);
2726                 } else {
2727                         char_type c = d->text_[i];
2728                         if (c == ' ')
2729                                 break;
2730                         os << sgml::escapeChar(c);
2731                 }
2732         }
2733         return i;
2734 }
2735
2736
2737 pos_type Paragraph::firstWordLyXHTML(XHTMLStream & xs, OutputParams const & runparams)
2738         const
2739 {
2740         pos_type i;
2741         for (i = 0; i < size(); ++i) {
2742                 if (Inset const * inset = getInset(i)) {
2743                         inset->xhtml(xs, runparams);
2744                 } else {
2745                         char_type c = d->text_[i];
2746                         if (c == ' ')
2747                                 break;
2748                         xs << c;
2749                 }
2750         }
2751         return i;
2752 }
2753
2754
2755 bool Paragraph::Private::onlyText(Buffer const & buf, Font const & outerfont, pos_type initial) const
2756 {
2757         Font font_old;
2758         pos_type size = text_.size();
2759         for (pos_type i = initial; i < size; ++i) {
2760                 Font font = owner_->getFont(buf.params(), i, outerfont);
2761                 if (text_[i] == META_INSET)
2762                         return false;
2763                 if (i != initial && font != font_old)
2764                         return false;
2765                 font_old = font;
2766         }
2767
2768         return true;
2769 }
2770
2771
2772 void Paragraph::simpleDocBookOnePar(Buffer const & buf,
2773                                     odocstream & os,
2774                                     OutputParams const & runparams,
2775                                     Font const & outerfont,
2776                                     pos_type initial) const
2777 {
2778         bool emph_flag = false;
2779
2780         Layout const & style = *d->layout_;
2781         FontInfo font_old =
2782                 style.labeltype == LABEL_MANUAL ? style.labelfont : style.font;
2783
2784         if (style.pass_thru && !d->onlyText(buf, outerfont, initial))
2785                 os << "]]>";
2786
2787         // parsing main loop
2788         for (pos_type i = initial; i < size(); ++i) {
2789                 Font font = getFont(buf.params(), i, outerfont);
2790
2791                 // handle <emphasis> tag
2792                 if (font_old.emph() != font.fontInfo().emph()) {
2793                         if (font.fontInfo().emph() == FONT_ON) {
2794                                 os << "<emphasis>";
2795                                 emph_flag = true;
2796                         } else if (i != initial) {
2797                                 os << "</emphasis>";
2798                                 emph_flag = false;
2799                         }
2800                 }
2801
2802                 if (Inset const * inset = getInset(i)) {
2803                         inset->docbook(os, runparams);
2804                 } else {
2805                         char_type c = d->text_[i];
2806
2807                         if (style.pass_thru)
2808                                 os.put(c);
2809                         else
2810                                 os << sgml::escapeChar(c);
2811                 }
2812                 font_old = font.fontInfo();
2813         }
2814
2815         if (emph_flag) {
2816                 os << "</emphasis>";
2817         }
2818
2819         if (style.free_spacing)
2820                 os << '\n';
2821         if (style.pass_thru && !d->onlyText(buf, outerfont, initial))
2822                 os << "<![CDATA[";
2823 }
2824
2825
2826 namespace {
2827 void doFontSwitch(vector<html::FontTag> & tagsToOpen,
2828                   vector<html::EndFontTag> & tagsToClose,
2829                   bool & flag, FontState curstate, html::FontTypes type)
2830 {
2831         if (curstate == FONT_ON) {
2832                 tagsToOpen.push_back(html::FontTag(type));
2833                 flag = true;
2834         } else if (flag) {
2835                 tagsToClose.push_back(html::EndFontTag(type));
2836                 flag = false;
2837         }
2838 }
2839 }
2840
2841
2842 docstring Paragraph::simpleLyXHTMLOnePar(Buffer const & buf,
2843                                     XHTMLStream & xs,
2844                                     OutputParams const & runparams,
2845                                     Font const & outerfont,
2846                                     pos_type initial) const
2847 {
2848         docstring retval;
2849
2850         // track whether we have opened these tags
2851         bool emph_flag = false;
2852         bool bold_flag = false;
2853         bool noun_flag = false;
2854         bool ubar_flag = false;
2855         bool dbar_flag = false;
2856         bool sout_flag = false;
2857         bool wave_flag = false;
2858         // shape tags
2859         bool shap_flag = false;
2860         // family tags
2861         bool faml_flag = false;
2862         // size tags
2863         bool size_flag = false;
2864
2865         Layout const & style = *d->layout_;
2866
2867         xs.startParagraph(allowEmpty());
2868
2869         FontInfo font_old =
2870                 style.labeltype == LABEL_MANUAL ? style.labelfont : style.font;
2871
2872         FontShape  curr_fs   = INHERIT_SHAPE;
2873         FontFamily curr_fam  = INHERIT_FAMILY;
2874         FontSize   curr_size = FONT_SIZE_INHERIT;
2875
2876         string const default_family =
2877                 buf.masterBuffer()->params().fonts_default_family;
2878
2879         vector<html::FontTag> tagsToOpen;
2880         vector<html::EndFontTag> tagsToClose;
2881
2882         // parsing main loop
2883         for (pos_type i = initial; i < size(); ++i) {
2884                 // let's not show deleted material in the output
2885                 if (isDeleted(i))
2886                         continue;
2887
2888                 Font const font = getFont(buf.masterBuffer()->params(), i, outerfont);
2889
2890                 // emphasis
2891                 FontState curstate = font.fontInfo().emph();
2892                 if (font_old.emph() != curstate)
2893                         doFontSwitch(tagsToOpen, tagsToClose, emph_flag, curstate, html::FT_EMPH);
2894
2895                 // noun
2896                 curstate = font.fontInfo().noun();
2897                 if (font_old.noun() != curstate)
2898                         doFontSwitch(tagsToOpen, tagsToClose, noun_flag, curstate, html::FT_NOUN);
2899
2900                 // underbar
2901                 curstate = font.fontInfo().underbar();
2902                 if (font_old.underbar() != curstate)
2903                         doFontSwitch(tagsToOpen, tagsToClose, ubar_flag, curstate, html::FT_UBAR);
2904
2905                 // strikeout
2906                 curstate = font.fontInfo().strikeout();
2907                 if (font_old.strikeout() != curstate)
2908                         doFontSwitch(tagsToOpen, tagsToClose, sout_flag, curstate, html::FT_SOUT);
2909
2910                 // double underbar
2911                 curstate = font.fontInfo().uuline();
2912                 if (font_old.uuline() != curstate)
2913                         doFontSwitch(tagsToOpen, tagsToClose, dbar_flag, curstate, html::FT_DBAR);
2914
2915                 // wavy line
2916                 curstate = font.fontInfo().uwave();
2917                 if (font_old.uwave() != curstate)
2918                         doFontSwitch(tagsToOpen, tagsToClose, wave_flag, curstate, html::FT_WAVE);
2919
2920                 // bold
2921                 // a little hackish, but allows us to reuse what we have.
2922                 curstate = (font.fontInfo().series() == BOLD_SERIES ? FONT_ON : FONT_OFF);
2923                 if (font_old.series() != font.fontInfo().series())
2924                         doFontSwitch(tagsToOpen, tagsToClose, bold_flag, curstate, html::FT_BOLD);
2925
2926                 // Font shape
2927                 curr_fs = font.fontInfo().shape();
2928                 FontShape old_fs = font_old.shape();
2929                 if (old_fs != curr_fs) {
2930                         if (shap_flag) {
2931                                 switch (old_fs) {
2932                                 case ITALIC_SHAPE:
2933                                         tagsToClose.push_back(html::EndFontTag(html::FT_ITALIC));
2934                                         break;
2935                                 case SLANTED_SHAPE:
2936                                         tagsToClose.push_back(html::EndFontTag(html::FT_SLANTED));
2937                                         break;
2938                                 case SMALLCAPS_SHAPE:
2939                                         tagsToClose.push_back(html::EndFontTag(html::FT_SMALLCAPS));
2940                                         break;
2941                                 case UP_SHAPE:
2942                                 case INHERIT_SHAPE:
2943                                         break;
2944                                 default:
2945                                         // the other tags are for internal use
2946                                         LATTEST(false);
2947                                         break;
2948                                 }
2949                                 shap_flag = false;
2950                         }
2951                         switch (curr_fs) {
2952                         case ITALIC_SHAPE:
2953                                 tagsToOpen.push_back(html::FontTag(html::FT_ITALIC));
2954                                 shap_flag = true;
2955                                 break;
2956                         case SLANTED_SHAPE:
2957                                 tagsToOpen.push_back(html::FontTag(html::FT_SLANTED));
2958                                 shap_flag = true;
2959                                 break;
2960                         case SMALLCAPS_SHAPE:
2961                                 tagsToOpen.push_back(html::FontTag(html::FT_SMALLCAPS));
2962                                 shap_flag = true;
2963                                 break;
2964                         case UP_SHAPE:
2965                         case INHERIT_SHAPE:
2966                                 break;
2967                         default:
2968                                 // the other tags are for internal use
2969                                 LATTEST(false);
2970                                 break;
2971                         }
2972                 }
2973
2974                 // Font family
2975                 curr_fam = font.fontInfo().family();
2976                 FontFamily old_fam = font_old.family();
2977                 if (old_fam != curr_fam) {
2978                         if (faml_flag) {
2979                                 switch (old_fam) {
2980                                 case ROMAN_FAMILY:
2981                                         tagsToClose.push_back(html::EndFontTag(html::FT_ROMAN));
2982                                         break;
2983                                 case SANS_FAMILY:
2984                                         tagsToClose.push_back(html::EndFontTag(html::FT_SANS));
2985                                         break;
2986                                 case TYPEWRITER_FAMILY:
2987                                         tagsToClose.push_back(html::EndFontTag(html::FT_TYPE));
2988                                         break;
2989                                 case INHERIT_FAMILY:
2990                                         break;
2991                                 default:
2992                                         // the other tags are for internal use
2993                                         LATTEST(false);
2994                                         break;
2995                                 }
2996                                 faml_flag = false;
2997                         }
2998                         switch (curr_fam) {
2999                         case ROMAN_FAMILY:
3000                                 // we will treat a "default" font family as roman, since we have
3001                                 // no other idea what to do.
3002                                 if (default_family != "rmdefault" && default_family != "default") {
3003                                         tagsToOpen.push_back(html::FontTag(html::FT_ROMAN));
3004                                         faml_flag = true;
3005                                 }
3006                                 break;
3007                         case SANS_FAMILY:
3008                                 if (default_family != "sfdefault") {
3009                                         tagsToOpen.push_back(html::FontTag(html::FT_SANS));
3010                                         faml_flag = true;
3011                                 }
3012                                 break;
3013                         case TYPEWRITER_FAMILY:
3014                                 if (default_family != "ttdefault") {
3015                                         tagsToOpen.push_back(html::FontTag(html::FT_TYPE));
3016                                         faml_flag = true;
3017                                 }
3018                                 break;
3019                         case INHERIT_FAMILY:
3020                                 break;
3021                         default:
3022                                 // the other tags are for internal use
3023                                 LATTEST(false);
3024                                 break;
3025                         }
3026                 }
3027
3028                 // Font size
3029                 curr_size = font.fontInfo().size();
3030                 FontSize old_size = font_old.size();
3031                 if (old_size != curr_size) {
3032                         if (size_flag) {
3033                                 switch (old_size) {
3034                                 case FONT_SIZE_TINY:
3035                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_TINY));
3036                                         break;
3037                                 case FONT_SIZE_SCRIPT:
3038                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_SCRIPT));
3039                                         break;
3040                                 case FONT_SIZE_FOOTNOTE:
3041                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_FOOTNOTE));
3042                                         break;
3043                                 case FONT_SIZE_SMALL:
3044                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_SMALL));
3045                                         break;
3046                                 case FONT_SIZE_LARGE:
3047                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_LARGE));
3048                                         break;
3049                                 case FONT_SIZE_LARGER:
3050                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_LARGER));
3051                                         break;
3052                                 case FONT_SIZE_LARGEST:
3053                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_LARGEST));
3054                                         break;
3055                                 case FONT_SIZE_HUGE:
3056                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_HUGE));
3057                                         break;
3058                                 case FONT_SIZE_HUGER:
3059                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_HUGER));
3060                                         break;
3061                                 case FONT_SIZE_INCREASE:
3062                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_INCREASE));
3063                                         break;
3064                                 case FONT_SIZE_DECREASE:
3065                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_DECREASE));
3066                                         break;
3067                                 case FONT_SIZE_INHERIT:
3068                                 case FONT_SIZE_NORMAL:
3069                                         break;
3070                                 default:
3071                                         // the other tags are for internal use
3072                                         LATTEST(false);
3073                                         break;
3074                                 }
3075                                 size_flag = false;
3076                         }
3077                         switch (curr_size) {
3078                         case FONT_SIZE_TINY:
3079                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_TINY));
3080                                 size_flag = true;
3081                                 break;
3082                         case FONT_SIZE_SCRIPT:
3083                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_SCRIPT));
3084                                 size_flag = true;
3085                                 break;
3086                         case FONT_SIZE_FOOTNOTE:
3087                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_FOOTNOTE));
3088                                 size_flag = true;
3089                                 break;
3090                         case FONT_SIZE_SMALL:
3091                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_SMALL));
3092                                 size_flag = true;
3093                                 break;
3094                         case FONT_SIZE_LARGE:
3095                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_LARGE));
3096                                 size_flag = true;
3097                                 break;
3098                         case FONT_SIZE_LARGER:
3099                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_LARGER));
3100                                 size_flag = true;
3101                                 break;
3102                         case FONT_SIZE_LARGEST:
3103                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_LARGEST));
3104                                 size_flag = true;
3105                                 break;
3106                         case FONT_SIZE_HUGE:
3107                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_HUGE));
3108                                 size_flag = true;
3109                                 break;
3110                         case FONT_SIZE_HUGER:
3111                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_HUGER));
3112                                 size_flag = true;
3113                                 break;
3114                         case FONT_SIZE_INCREASE:
3115                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_INCREASE));
3116                                 size_flag = true;
3117                                 break;
3118                         case FONT_SIZE_DECREASE:
3119                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_DECREASE));
3120                                 size_flag = true;
3121                                 break;
3122                         case FONT_SIZE_NORMAL:
3123                         case FONT_SIZE_INHERIT:
3124                                 break;
3125                         default:
3126                                 // the other tags are for internal use
3127                                 LATTEST(false);
3128                                 break;
3129                         }
3130                 }
3131
3132                 // FIXME XHTML
3133                 // Other such tags? What about the other text ranges?
3134
3135                 vector<html::EndFontTag>::const_iterator cit = tagsToClose.begin();
3136                 vector<html::EndFontTag>::const_iterator cen = tagsToClose.end();
3137                 for (; cit != cen; ++cit)
3138                         xs << *cit;
3139
3140                 vector<html::FontTag>::const_iterator sit = tagsToOpen.begin();
3141                 vector<html::FontTag>::const_iterator sen = tagsToOpen.end();
3142                 for (; sit != sen; ++sit)
3143                         xs << *sit;
3144
3145                 tagsToClose.clear();
3146                 tagsToOpen.clear();
3147
3148                 Inset const * inset = getInset(i);
3149                 if (inset) {
3150                         if (!runparams.for_toc || inset->isInToc()) {
3151                                 OutputParams np = runparams;
3152                                 np.local_font = &font;
3153                                 if (!inset->getLayout().htmlisblock())
3154                                         np.html_in_par = true;
3155                                 retval += inset->xhtml(xs, np);
3156                         }
3157                 } else {
3158                         char_type c = getUChar(buf.masterBuffer()->params(), i);
3159
3160                         if (style.pass_thru || runparams.pass_thru)
3161                                 xs << c;
3162                         else if (c == '-') {
3163                                 docstring str;
3164                                 int j = i + 1;
3165                                 if (j < size() && d->text_[j] == '-') {
3166                                         j += 1;
3167                                         if (j < size() && d->text_[j] == '-') {
3168                                                 str += from_ascii("&mdash;");
3169                                                 i += 2;
3170                                         } else {
3171                                                 str += from_ascii("&ndash;");
3172                                                 i += 1;
3173                                         }
3174                                 }
3175                                 else
3176                                         str += c;
3177                                 // We don't want to escape the entities. Note that
3178                                 // it is safe to do this, since str can otherwise
3179                                 // only be "-". E.g., it can't be "<".
3180                                 xs << XHTMLStream::ESCAPE_NONE << str;
3181                         } else
3182                                 xs << c;
3183                 }
3184                 font_old = font.fontInfo();
3185         }
3186
3187         xs.closeFontTags();
3188         xs.endParagraph();
3189         return retval;
3190 }
3191
3192
3193 bool Paragraph::isHfill(pos_type pos) const
3194 {
3195         Inset const * inset = getInset(pos);
3196         return inset && (inset->lyxCode() == SPACE_CODE &&
3197                          inset->isStretchableSpace());
3198 }
3199
3200
3201 bool Paragraph::isNewline(pos_type pos) const
3202 {
3203         Inset const * inset = getInset(pos);
3204         return inset && inset->lyxCode() == NEWLINE_CODE;
3205 }
3206
3207
3208 bool Paragraph::isLineSeparator(pos_type pos) const
3209 {
3210         char_type const c = d->text_[pos];
3211         if (isLineSeparatorChar(c))
3212                 return true;
3213         Inset const * inset = getInset(pos);
3214         return inset && inset->isLineSeparator();
3215 }
3216
3217
3218 bool Paragraph::isWordSeparator(pos_type pos) const
3219 {
3220         if (pos == size())
3221                 return true;
3222         if (Inset const * inset = getInset(pos))
3223                 return !inset->isLetter();
3224         // if we have a hard hyphen (no en- or emdash) or apostrophe
3225         // we pass this to the spell checker
3226         // FIXME: this method is subject to change, visit
3227         // https://bugzilla.mozilla.org/show_bug.cgi?id=355178
3228         // to get an impression how complex this is.
3229         if (isHardHyphenOrApostrophe(pos))
3230                 return false;
3231         char_type const c = d->text_[pos];
3232         // We want to pass the escape chars to the spellchecker
3233         docstring const escape_chars = from_utf8(lyxrc.spellchecker_esc_chars);
3234         return !isLetterChar(c) && !isDigitASCII(c) && !contains(escape_chars, c);
3235 }
3236
3237
3238 bool Paragraph::isHardHyphenOrApostrophe(pos_type pos) const
3239 {
3240         pos_type const psize = size();
3241         if (pos >= psize)
3242                 return false;
3243         char_type const c = d->text_[pos];
3244         if (c != '-' && c != '\'')
3245                 return false;
3246         int nextpos = pos + 1;
3247         int prevpos = pos > 0 ? pos - 1 : 0;
3248         if ((nextpos == psize || isSpace(nextpos))
3249                 && (pos == 0 || isSpace(prevpos)))
3250                 return false;
3251         return c == '\''
3252                 || ((nextpos == psize || d->text_[nextpos] != '-')
3253                 && (pos == 0 || d->text_[prevpos] != '-'));
3254 }
3255
3256
3257 bool Paragraph::isSameSpellRange(pos_type pos1, pos_type pos2) const
3258 {
3259         return pos1 == pos2
3260                 || d->speller_state_.getRange(pos1) == d->speller_state_.getRange(pos2);
3261 }
3262
3263
3264 bool Paragraph::isChar(pos_type pos) const
3265 {
3266         if (Inset const * inset = getInset(pos))
3267                 return inset->isChar();
3268         char_type const c = d->text_[pos];
3269         return !isLetterChar(c) && !isDigitASCII(c) && !lyx::isSpace(c);
3270 }
3271
3272
3273 bool Paragraph::isSpace(pos_type pos) const
3274 {
3275         if (Inset const * inset = getInset(pos))
3276                 return inset->isSpace();
3277         char_type const c = d->text_[pos];
3278         return lyx::isSpace(c);
3279 }
3280
3281
3282 Language const *
3283 Paragraph::getParLanguage(BufferParams const & bparams) const
3284 {
3285         if (!empty())
3286                 return getFirstFontSettings(bparams).language();
3287         // FIXME: we should check the prev par as well (Lgb)
3288         return bparams.language;
3289 }
3290
3291
3292 bool Paragraph::isRTL(BufferParams const & bparams) const
3293 {
3294         return lyxrc.rtl_support
3295                 && getParLanguage(bparams)->rightToLeft()
3296                 && !inInset().getLayout().forceLTR();
3297 }
3298
3299
3300 void Paragraph::changeLanguage(BufferParams const & bparams,
3301                                Language const * from, Language const * to)
3302 {
3303         // change language including dummy font change at the end
3304         for (pos_type i = 0; i <= size(); ++i) {
3305                 Font font = getFontSettings(bparams, i);
3306                 if (font.language() == from) {
3307                         font.setLanguage(to);
3308                         setFont(i, font);
3309                         d->requestSpellCheck(i);
3310                 }
3311         }
3312 }
3313
3314
3315 bool Paragraph::isMultiLingual(BufferParams const & bparams) const
3316 {
3317         Language const * doc_language = bparams.language;
3318         FontList::const_iterator cit = d->fontlist_.begin();
3319         FontList::const_iterator end = d->fontlist_.end();
3320
3321         for (; cit != end; ++cit)
3322                 if (cit->font().language() != ignore_language &&
3323                     cit->font().language() != latex_language &&
3324                     cit->font().language() != doc_language)
3325                         return true;
3326         return false;
3327 }
3328
3329
3330 void Paragraph::getLanguages(std::set<Language const *> & languages) const
3331 {
3332         FontList::const_iterator cit = d->fontlist_.begin();
3333         FontList::const_iterator end = d->fontlist_.end();
3334
3335         for (; cit != end; ++cit) {
3336                 Language const * lang = cit->font().language();
3337                 if (lang != ignore_language &&
3338                     lang != latex_language)
3339                         languages.insert(lang);
3340         }
3341 }
3342
3343
3344 docstring Paragraph::asString(int options) const
3345 {
3346         return asString(0, size(), options);
3347 }
3348
3349
3350 docstring Paragraph::asString(pos_type beg, pos_type end, int options) const
3351 {
3352         odocstringstream os;
3353
3354         if (beg == 0
3355             && options & AS_STR_LABEL
3356             && !d->params_.labelString().empty())
3357                 os << d->params_.labelString() << ' ';
3358
3359         for (pos_type i = beg; i < end; ++i) {
3360                 if ((options & AS_STR_SKIPDELETE) && isDeleted(i))
3361                         continue;
3362                 char_type const c = d->text_[i];
3363                 if (isPrintable(c) || c == '\t'
3364                     || (c == '\n' && (options & AS_STR_NEWLINES)))
3365                         os.put(c);
3366                 else if (c == META_INSET && (options & AS_STR_INSETS)) {
3367                         getInset(i)->toString(os);
3368                         if (getInset(i)->asInsetMath())
3369                                 os << " ";
3370                 }
3371         }
3372
3373         return os.str();
3374 }
3375
3376
3377 void Paragraph::forToc(docstring & os, size_t maxlen) const
3378 {
3379         if (!d->params_.labelString().empty())
3380                 os += d->params_.labelString() + ' ';
3381         for (pos_type i = 0; i < size() && os.length() < maxlen; ++i) {
3382                 if (isDeleted(i))
3383                         continue;
3384                 char_type const c = d->text_[i];
3385                 if (isPrintable(c))
3386                         os += c;
3387                 else if (c == '\t' || c == '\n')
3388                         os += ' ';
3389                 else if (c == META_INSET)
3390                         getInset(i)->forToc(os, maxlen);
3391         }
3392 }
3393
3394
3395 docstring Paragraph::stringify(pos_type beg, pos_type end, int options,
3396         OutputParams const & runparams) const
3397 {
3398         odocstringstream os;
3399
3400         if (beg == 0
3401                 && options & AS_STR_LABEL
3402                 && !d->params_.labelString().empty())
3403                 os << d->params_.labelString() << ' ';
3404
3405         OutputParams op = runparams;
3406         op.for_search = true;
3407
3408         for (pos_type i = beg; i < end; ++i) {
3409                 char_type const c = d->text_[i];
3410                 if (isPrintable(c) || c == '\t'
3411                     || (c == '\n' && (options & AS_STR_NEWLINES)))
3412                         os.put(c);
3413                 else if (c == META_INSET && (options & AS_STR_INSETS)) {
3414                         getInset(i)->plaintext(os, op);
3415                 }
3416         }
3417
3418         return os.str();
3419 }
3420
3421
3422 void Paragraph::setInsetOwner(Inset const * inset)
3423 {
3424         d->inset_owner_ = inset;
3425 }
3426
3427
3428 int Paragraph::id() const
3429 {
3430         return d->id_;
3431 }
3432
3433
3434 void Paragraph::setId(int id)
3435 {
3436         d->id_ = id;
3437 }
3438
3439
3440 Layout const & Paragraph::layout() const
3441 {
3442         return *d->layout_;
3443 }
3444
3445
3446 void Paragraph::setLayout(Layout const & layout)
3447 {
3448         d->layout_ = &layout;
3449 }
3450
3451
3452 void Paragraph::setDefaultLayout(DocumentClass const & tc)
3453 {
3454         setLayout(tc.defaultLayout());
3455 }
3456
3457
3458 void Paragraph::setPlainLayout(DocumentClass const & tc)
3459 {
3460         setLayout(tc.plainLayout());
3461 }
3462
3463
3464 void Paragraph::setPlainOrDefaultLayout(DocumentClass const & tclass)
3465 {
3466         if (usePlainLayout())
3467                 setPlainLayout(tclass);
3468         else
3469                 setDefaultLayout(tclass);
3470 }
3471
3472
3473 Inset const & Paragraph::inInset() const
3474 {
3475         LBUFERR(d->inset_owner_);
3476         return *d->inset_owner_;
3477 }
3478
3479
3480 ParagraphParameters & Paragraph::params()
3481 {
3482         return d->params_;
3483 }
3484
3485
3486 ParagraphParameters const & Paragraph::params() const
3487 {
3488         return d->params_;
3489 }
3490
3491
3492 bool Paragraph::isFreeSpacing() const
3493 {
3494         if (d->layout_->free_spacing)
3495                 return true;
3496         return d->inset_owner_ && d->inset_owner_->isFreeSpacing();
3497 }
3498
3499
3500 bool Paragraph::allowEmpty() const
3501 {
3502         if (d->layout_->keepempty)
3503                 return true;
3504         return d->inset_owner_ && d->inset_owner_->allowEmpty();
3505 }
3506
3507
3508 char_type Paragraph::transformChar(char_type c, pos_type pos) const
3509 {
3510         if (!Encodings::isArabicChar(c))
3511                 return c;
3512
3513         char_type prev_char = ' ';
3514         char_type next_char = ' ';
3515
3516         for (pos_type i = pos - 1; i >= 0; --i) {
3517                 char_type const par_char = d->text_[i];
3518                 if (!Encodings::isArabicComposeChar(par_char)) {
3519                         prev_char = par_char;
3520                         break;
3521                 }
3522         }
3523
3524         for (pos_type i = pos + 1, end = size(); i < end; ++i) {
3525                 char_type const par_char = d->text_[i];
3526                 if (!Encodings::isArabicComposeChar(par_char)) {
3527                         next_char = par_char;
3528                         break;
3529                 }
3530         }
3531
3532         if (Encodings::isArabicChar(next_char)) {
3533                 if (Encodings::isArabicChar(prev_char) &&
3534                         !Encodings::isArabicSpecialChar(prev_char))
3535                         return Encodings::transformChar(c, Encodings::FORM_MEDIAL);
3536                 else
3537                         return Encodings::transformChar(c, Encodings::FORM_INITIAL);
3538         } else {
3539                 if (Encodings::isArabicChar(prev_char) &&
3540                         !Encodings::isArabicSpecialChar(prev_char))
3541                         return Encodings::transformChar(c, Encodings::FORM_FINAL);
3542                 else
3543                         return Encodings::transformChar(c, Encodings::FORM_ISOLATED);
3544         }
3545 }
3546
3547
3548 bool Paragraph::brokenBiblio() const
3549 {
3550         // there is a problem if there is no bibitem at position 0 or
3551         // if there is another bibitem in the paragraph.
3552         return d->layout_->labeltype == LABEL_BIBLIO
3553                 && (d->insetlist_.find(BIBITEM_CODE) != 0
3554                     || d->insetlist_.find(BIBITEM_CODE, 1) > 0);
3555 }
3556
3557
3558 int Paragraph::fixBiblio(Buffer const & buffer)
3559 {
3560         // FIXME: What about the case where paragraph is not BIBLIO
3561         // but there is an InsetBibitem?
3562         // FIXME: when there was already an inset at 0, the return value is 1,
3563         // which does not tell whether another inset has been remove; the
3564         // cursor cannot be correctly updated.
3565
3566         if (d->layout_->labeltype != LABEL_BIBLIO)
3567                 return 0;
3568
3569         bool const track_changes = buffer.params().trackChanges;
3570         int bibitem_pos = d->insetlist_.find(BIBITEM_CODE);
3571         bool const hasbibitem0 = bibitem_pos == 0;
3572
3573         if (hasbibitem0) {
3574                 bibitem_pos = d->insetlist_.find(BIBITEM_CODE, 1);
3575                 // There was an InsetBibitem at pos 0, and no other one => OK
3576                 if (bibitem_pos == -1)
3577                         return 0;
3578                 // there is a bibitem at the 0 position, but since
3579                 // there is a second one, we copy the second on the
3580                 // first. We're assuming there are at most two of
3581                 // these, which there should be.
3582                 // FIXME: why does it make sense to do that rather
3583                 // than keep the first? (JMarc)
3584                 Inset * inset = releaseInset(bibitem_pos);
3585                 d->insetlist_.begin()->inset = inset;
3586                 return -bibitem_pos;
3587         }
3588
3589         // We need to create an inset at the beginning
3590         Inset * inset = 0;
3591         if (bibitem_pos > 0) {
3592                 // there was one somewhere in the paragraph, let's move it
3593                 inset = d->insetlist_.release(bibitem_pos);
3594                 eraseChar(bibitem_pos, track_changes);
3595         } else
3596                 // make a fresh one
3597                 inset = new InsetBibitem(const_cast<Buffer *>(&buffer),
3598                                          InsetCommandParams(BIBITEM_CODE));
3599
3600         Font font(inherit_font, buffer.params().language);
3601         insertInset(0, inset, font, Change(track_changes ? Change::INSERTED
3602                                                    : Change::UNCHANGED));
3603
3604         return 1;
3605 }
3606
3607
3608 void Paragraph::checkAuthors(AuthorList const & authorList)
3609 {
3610         d->changes_.checkAuthors(authorList);
3611 }
3612
3613
3614 bool Paragraph::isChanged(pos_type pos) const
3615 {
3616         return lookupChange(pos).changed();
3617 }
3618
3619
3620 bool Paragraph::isInserted(pos_type pos) const
3621 {
3622         return lookupChange(pos).inserted();
3623 }
3624
3625
3626 bool Paragraph::isDeleted(pos_type pos) const
3627 {
3628         return lookupChange(pos).deleted();
3629 }
3630
3631
3632 InsetList const & Paragraph::insetList() const
3633 {
3634         return d->insetlist_;
3635 }
3636
3637
3638 void Paragraph::setBuffer(Buffer & b)
3639 {
3640         d->insetlist_.setBuffer(b);
3641 }
3642
3643
3644 Inset * Paragraph::releaseInset(pos_type pos)
3645 {
3646         Inset * inset = d->insetlist_.release(pos);
3647         /// does not honour change tracking!
3648         eraseChar(pos, false);
3649         return inset;
3650 }
3651
3652
3653 Inset * Paragraph::getInset(pos_type pos)
3654 {
3655         return (pos < pos_type(d->text_.size()) && d->text_[pos] == META_INSET)
3656                  ? d->insetlist_.get(pos) : 0;
3657 }
3658
3659
3660 Inset const * Paragraph::getInset(pos_type pos) const
3661 {
3662         return (pos < pos_type(d->text_.size()) && d->text_[pos] == META_INSET)
3663                  ? d->insetlist_.get(pos) : 0;
3664 }
3665
3666
3667 void Paragraph::changeCase(BufferParams const & bparams, pos_type pos,
3668                 pos_type & right, TextCase action)
3669 {
3670         // process sequences of modified characters; in change
3671         // tracking mode, this approach results in much better
3672         // usability than changing case on a char-by-char basis
3673         // We also need to track the current font, since font
3674         // changes within sequences can occur.
3675         vector<pair<char_type, Font> > changes;
3676
3677         bool const trackChanges = bparams.trackChanges;
3678
3679         bool capitalize = true;
3680
3681         for (; pos < right; ++pos) {
3682                 char_type oldChar = d->text_[pos];
3683                 char_type newChar = oldChar;
3684
3685                 // ignore insets and don't play with deleted text!
3686                 if (oldChar != META_INSET && !isDeleted(pos)) {
3687                         switch (action) {
3688                                 case text_lowercase:
3689                                         newChar = lowercase(oldChar);
3690                                         break;
3691                                 case text_capitalization:
3692                                         if (capitalize) {
3693                                                 newChar = uppercase(oldChar);
3694                                                 capitalize = false;
3695                                         }
3696                                         break;
3697                                 case text_uppercase:
3698                                         newChar = uppercase(oldChar);
3699                                         break;
3700                         }
3701                 }
3702
3703                 if (isWordSeparator(pos) || isDeleted(pos)) {
3704                         // permit capitalization again
3705                         capitalize = true;
3706                 }
3707
3708                 if (oldChar != newChar) {
3709                         changes.push_back(make_pair(newChar, getFontSettings(bparams, pos)));
3710                         if (pos != right - 1)
3711                                 continue;
3712                         // step behind the changing area
3713                         pos++;
3714                 }
3715
3716                 int erasePos = pos - changes.size();
3717                 for (size_t i = 0; i < changes.size(); i++) {
3718                         insertChar(pos, changes[i].first,
3719                                    changes[i].second,
3720                                    trackChanges);
3721                         if (!eraseChar(erasePos, trackChanges)) {
3722                                 ++erasePos;
3723                                 ++pos; // advance
3724                                 ++right; // expand selection
3725                         }
3726                 }
3727                 changes.clear();
3728         }
3729 }
3730
3731
3732 int Paragraph::find(docstring const & str, bool cs, bool mw,
3733                 pos_type start_pos, bool del) const
3734 {
3735         pos_type pos = start_pos;
3736         int const strsize = str.length();
3737         int i = 0;
3738         pos_type const parsize = d->text_.size();
3739         for (i = 0; i < strsize && pos < parsize; ++i, ++pos) {
3740                 // Ignore "invisible" letters such as ligature breaks
3741                 // and hyphenation chars while searching
3742                 while (pos < parsize - 1 && isInset(pos)) {
3743                         odocstringstream os;
3744                         getInset(pos)->toString(os);
3745                         if (!getInset(pos)->isLetter() || !os.str().empty())
3746                                 break;
3747                         pos++;
3748                 }
3749                 if (cs && str[i] != d->text_[pos])
3750                         break;
3751                 if (!cs && uppercase(str[i]) != uppercase(d->text_[pos]))
3752                         break;
3753                 if (!del && isDeleted(pos))
3754                         break;
3755         }
3756
3757         if (i != strsize)
3758                 return 0;
3759
3760         // if necessary, check whether string matches word
3761         if (mw) {
3762                 if (start_pos > 0 && !isWordSeparator(start_pos - 1))
3763                         return 0;
3764                 if (pos < parsize
3765                         && !isWordSeparator(pos))
3766                         return 0;
3767         }
3768
3769         return pos - start_pos;
3770 }
3771
3772
3773 char_type Paragraph::getChar(pos_type pos) const
3774 {
3775         return d->text_[pos];
3776 }
3777
3778
3779 pos_type Paragraph::size() const
3780 {
3781         return d->text_.size();
3782 }
3783
3784
3785 bool Paragraph::empty() const
3786 {
3787         return d->text_.empty();
3788 }
3789
3790
3791 bool Paragraph::isInset(pos_type pos) const
3792 {
3793         return d->text_[pos] == META_INSET;
3794 }
3795
3796
3797 bool Paragraph::isSeparator(pos_type pos) const
3798 {
3799         //FIXME: Are we sure this can be the only separator?
3800         return d->text_[pos] == ' ';
3801 }
3802
3803
3804 void Paragraph::deregisterWords()
3805 {
3806         Private::LangWordsMap::const_iterator itl = d->words_.begin();
3807         Private::LangWordsMap::const_iterator ite = d->words_.end();
3808         for (; itl != ite; ++itl) {
3809                 WordList * wl = theWordList(itl->first);
3810                 Private::Words::const_iterator it = (itl->second).begin();
3811                 Private::Words::const_iterator et = (itl->second).end();
3812                 for (; it != et; ++it)
3813                         wl->remove(*it);
3814         }
3815         d->words_.clear();
3816 }
3817
3818
3819 void Paragraph::locateWord(pos_type & from, pos_type & to,
3820         word_location const loc) const
3821 {
3822         switch (loc) {
3823         case WHOLE_WORD_STRICT:
3824                 if (from == 0 || from == size()
3825                     || isWordSeparator(from)
3826                     || isWordSeparator(from - 1)) {
3827                         to = from;
3828                         return;
3829                 }
3830                 // no break here, we go to the next
3831
3832         case WHOLE_WORD:
3833                 // If we are already at the beginning of a word, do nothing
3834                 if (!from || isWordSeparator(from - 1))
3835                         break;
3836                 // no break here, we go to the next
3837
3838         case PREVIOUS_WORD:
3839                 // always move the cursor to the beginning of previous word
3840                 while (from && !isWordSeparator(from - 1))
3841                         --from;
3842                 break;
3843         case NEXT_WORD:
3844                 LYXERR0("Paragraph::locateWord: NEXT_WORD not implemented yet");
3845                 break;
3846         case PARTIAL_WORD:
3847                 // no need to move the 'from' cursor
3848                 break;
3849         }
3850         to = from;
3851         while (to < size() && !isWordSeparator(to))
3852                 ++to;
3853 }
3854
3855
3856 void Paragraph::collectWords()
3857 {
3858         pos_type n = size();
3859         for (pos_type pos = 0; pos < n; ++pos) {
3860                 if (isWordSeparator(pos))
3861                         continue;
3862                 pos_type from = pos;
3863                 locateWord(from, pos, WHOLE_WORD);
3864                 if ((pos - from) >= (int)lyxrc.completion_minlength) {
3865                         docstring word = asString(from, pos, AS_STR_NONE);
3866                         FontList::const_iterator cit = d->fontlist_.fontIterator(pos);
3867                         if (cit == d->fontlist_.end())
3868                                 return;
3869                         Language const * lang = cit->font().language();
3870                         d->words_[*lang].insert(word);
3871                 }
3872         }
3873 }
3874
3875
3876 void Paragraph::registerWords()
3877 {
3878         Private::LangWordsMap::const_iterator itl = d->words_.begin();
3879         Private::LangWordsMap::const_iterator ite = d->words_.end();
3880         for (; itl != ite; ++itl) {
3881                 WordList * wl = theWordList(itl->first);
3882                 Private::Words::const_iterator it = (itl->second).begin();
3883                 Private::Words::const_iterator et = (itl->second).end();
3884                 for (; it != et; ++it)
3885                         wl->insert(*it);
3886         }
3887 }
3888
3889
3890 void Paragraph::updateWords()
3891 {
3892         deregisterWords();
3893         collectWords();
3894         registerWords();
3895 }
3896
3897
3898 void Paragraph::Private::appendSkipPosition(SkipPositions & skips, pos_type const pos) const
3899 {
3900         SkipPositionsIterator begin = skips.begin();
3901         SkipPositions::iterator end = skips.end();
3902         if (pos > 0 && begin < end) {
3903                 --end;
3904                 if (end->last == pos - 1) {
3905                         end->last = pos;
3906                         return;
3907                 }
3908         }
3909         skips.insert(end, FontSpan(pos, pos));
3910 }
3911
3912
3913 Language * Paragraph::Private::locateSpellRange(
3914         pos_type & from, pos_type & to,
3915         SkipPositions & skips) const
3916 {
3917         // skip leading white space
3918         while (from < to && owner_->isWordSeparator(from))
3919                 ++from;
3920         // don't check empty range
3921         if (from >= to)
3922                 return 0;
3923         // get current language
3924         Language * lang = getSpellLanguage(from);
3925         pos_type last = from;
3926         bool samelang = true;
3927         bool sameinset = true;
3928         while (last < to && samelang && sameinset) {
3929                 // hop to end of word
3930                 while (last < to && !owner_->isWordSeparator(last)) {
3931                         if (owner_->getInset(last)) {
3932                                 appendSkipPosition(skips, last);
3933                         } else if (owner_->isDeleted(last)) {
3934                                 appendSkipPosition(skips, last);
3935                         }
3936                         ++last;
3937                 }
3938                 // hop to next word while checking for insets
3939                 while (sameinset && last < to && owner_->isWordSeparator(last)) {
3940                         if (Inset const * inset = owner_->getInset(last))
3941                                 sameinset = inset->isChar() && inset->isLetter();
3942                         if (sameinset && owner_->isDeleted(last)) {
3943                                 appendSkipPosition(skips, last);
3944                         }
3945                         if (sameinset)
3946                                 last++;
3947                 }
3948                 if (sameinset && last < to) {
3949                         // now check for language change
3950                         samelang = lang == getSpellLanguage(last);
3951                 }
3952         }
3953         // if language change detected backstep is needed
3954         if (!samelang)
3955                 --last;
3956         to = last;
3957         return lang;
3958 }
3959
3960
3961 Language * Paragraph::Private::getSpellLanguage(pos_type const from) const
3962 {
3963         Language * lang =
3964                 const_cast<Language *>(owner_->getFontSettings(
3965                         inset_owner_->buffer().params(), from).language());
3966         if (lang == inset_owner_->buffer().params().language
3967                 && !lyxrc.spellchecker_alt_lang.empty()) {
3968                 string lang_code;
3969                 string const lang_variety =
3970                         split(lyxrc.spellchecker_alt_lang, lang_code, '-');
3971                 lang->setCode(lang_code);
3972                 lang->setVariety(lang_variety);
3973         }
3974         return lang;
3975 }
3976
3977
3978 void Paragraph::requestSpellCheck(pos_type pos)
3979 {
3980         d->requestSpellCheck(pos);
3981 }
3982
3983
3984 bool Paragraph::needsSpellCheck() const
3985 {
3986         SpellChecker::ChangeNumber speller_change_number = 0;
3987         if (theSpellChecker())
3988                 speller_change_number = theSpellChecker()->changeNumber();
3989         if (speller_change_number > d->speller_state_.currentChangeNumber()) {
3990                 d->speller_state_.needsCompleteRefresh(speller_change_number);
3991         }
3992         return d->needsSpellCheck();
3993 }
3994
3995
3996 bool Paragraph::Private::ignoreWord(docstring const & word) const
3997 {
3998         // Ignore words with digits
3999         // FIXME: make this customizable
4000         // (note that some checkers ignore words with digits by default)
4001         docstring::const_iterator cit = word.begin();
4002         docstring::const_iterator const end = word.end();
4003         for (; cit != end; ++cit) {
4004                 if (isNumber((*cit)))
4005                         return true;
4006         }
4007         return false;
4008 }
4009
4010
4011 SpellChecker::Result Paragraph::spellCheck(pos_type & from, pos_type & to,
4012         WordLangTuple & wl, docstring_list & suggestions,
4013         bool do_suggestion, bool check_learned) const
4014 {
4015         SpellChecker::Result result = SpellChecker::WORD_OK;
4016         SpellChecker * speller = theSpellChecker();
4017         if (!speller)
4018                 return result;
4019
4020         if (!d->layout_->spellcheck || !inInset().allowSpellCheck())
4021                 return result;
4022
4023         locateWord(from, to, WHOLE_WORD);
4024         if (from == to || from >= size())
4025                 return result;
4026
4027         docstring word = asString(from, to, AS_STR_INSETS | AS_STR_SKIPDELETE);
4028         Language * lang = d->getSpellLanguage(from);
4029
4030         wl = WordLangTuple(word, lang);
4031
4032         if (word.empty())
4033                 return result;
4034
4035         if (needsSpellCheck() || check_learned) {
4036                 pos_type end = to;
4037                 if (!d->ignoreWord(word)) {
4038                         bool const trailing_dot = to < size() && d->text_[to] == '.';
4039                         result = speller->check(wl);
4040                         if (SpellChecker::misspelled(result) && trailing_dot) {
4041                                 wl = WordLangTuple(word.append(from_ascii(".")), lang);
4042                                 result = speller->check(wl);
4043                                 if (!SpellChecker::misspelled(result)) {
4044                                         LYXERR(Debug::GUI, "misspelled word is correct with dot: \"" <<
4045                                            word << "\" [" <<
4046                                            from << ".." << to << "]");
4047                                 } else {
4048                                         // spell check with dot appended failed too
4049                                         // restore original word/lang value
4050                                         word = asString(from, to, AS_STR_INSETS | AS_STR_SKIPDELETE);
4051                                         wl = WordLangTuple(word, lang);
4052                                 }
4053                         }
4054                 }
4055                 if (!SpellChecker::misspelled(result)) {
4056                         // area up to the begin of the next word is not misspelled
4057                         while (end < size() && isWordSeparator(end))
4058                                 ++end;
4059                 }
4060                 d->setMisspelled(from, end, result);
4061         } else {
4062                 result = d->speller_state_.getState(from);
4063         }
4064
4065         if (do_suggestion)
4066                 suggestions.clear();
4067
4068         if (SpellChecker::misspelled(result)) {
4069                 LYXERR(Debug::GUI, "misspelled word: \"" <<
4070                            word << "\" [" <<
4071                            from << ".." << to << "]");
4072                 if (do_suggestion)
4073                         speller->suggest(wl, suggestions);
4074         }
4075         return result;
4076 }
4077
4078
4079 void Paragraph::Private::markMisspelledWords(
4080         pos_type const & first, pos_type const & last,
4081         SpellChecker::Result result,
4082         docstring const & word,
4083         SkipPositions const & skips)
4084 {
4085         if (!SpellChecker::misspelled(result)) {
4086                 setMisspelled(first, last, SpellChecker::WORD_OK);
4087                 return;
4088         }
4089         int snext = first;
4090         SpellChecker * speller = theSpellChecker();
4091         // locate and enumerate the error positions
4092         int nerrors = speller->numMisspelledWords();
4093         int numskipped = 0;
4094         SkipPositionsIterator it = skips.begin();
4095         SkipPositionsIterator et = skips.end();
4096         for (int index = 0; index < nerrors; ++index) {
4097                 int wstart;
4098                 int wlen = 0;
4099                 speller->misspelledWord(index, wstart, wlen);
4100                 /// should not happen if speller supports range checks
4101                 if (!wlen) continue;
4102                 docstring const misspelled = word.substr(wstart, wlen);
4103                 wstart += first + numskipped;
4104                 if (snext < wstart) {
4105                         /// mark the range of correct spelling
4106                         numskipped += countSkips(it, et, wstart);
4107                         setMisspelled(snext,
4108                                 wstart - 1, SpellChecker::WORD_OK);
4109                 }
4110                 snext = wstart + wlen;
4111                 numskipped += countSkips(it, et, snext);
4112                 /// mark the range of misspelling
4113                 setMisspelled(wstart, snext, result);
4114                 LYXERR(Debug::GUI, "misspelled word: \"" <<
4115                            misspelled << "\" [" <<
4116                            wstart << ".." << (snext-1) << "]");
4117                 ++snext;
4118         }
4119         if (snext <= last) {
4120                 /// mark the range of correct spelling at end
4121                 setMisspelled(snext, last, SpellChecker::WORD_OK);
4122         }
4123 }
4124
4125
4126 void Paragraph::spellCheck() const
4127 {
4128         SpellChecker * speller = theSpellChecker();
4129         if (!speller || empty() ||!needsSpellCheck())
4130                 return;
4131         pos_type start;
4132         pos_type endpos;
4133         d->rangeOfSpellCheck(start, endpos);
4134         if (speller->canCheckParagraph()) {
4135                 // loop until we leave the range
4136                 for (pos_type first = start; first < endpos; ) {
4137                         pos_type last = endpos;
4138                         Private::SkipPositions skips;
4139                         Language * lang = d->locateSpellRange(first, last, skips);
4140                         if (first >= endpos)
4141                                 break;
4142                         // start the spell checker on the unit of meaning
4143                         docstring word = asString(first, last, AS_STR_INSETS + AS_STR_SKIPDELETE);
4144                         WordLangTuple wl = WordLangTuple(word, lang);
4145                         SpellChecker::Result result = word.size() ?
4146                                 speller->check(wl) : SpellChecker::WORD_OK;
4147                         d->markMisspelledWords(first, last, result, word, skips);
4148                         first = ++last;
4149                 }
4150         } else {
4151                 static docstring_list suggestions;
4152                 pos_type to = endpos;
4153                 while (start < endpos) {
4154                         WordLangTuple wl;
4155                         spellCheck(start, to, wl, suggestions, false);
4156                         start = to + 1;
4157                 }
4158         }
4159         d->readySpellCheck();
4160 }
4161
4162
4163 bool Paragraph::isMisspelled(pos_type pos, bool check_boundary) const
4164 {
4165         bool result = SpellChecker::misspelled(d->speller_state_.getState(pos));
4166         if (result || pos <= 0 || pos > size())
4167                 return result;
4168         if (check_boundary && (pos == size() || isWordSeparator(pos)))
4169                 result = SpellChecker::misspelled(d->speller_state_.getState(pos - 1));
4170         return result;
4171 }
4172
4173
4174 string Paragraph::magicLabel() const
4175 {
4176         stringstream ss;
4177         ss << "magicparlabel-" << id();
4178         return ss.str();
4179 }
4180
4181
4182 } // namespace lyx