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 "Encoding.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 "VSpace.h"
  47 #include "WordLangTuple.h"
  48 #include "WordList.h"
  49
  50 #include "frontends/alert.h"
  51
  52 #include "insets/InsetBibitem.h"
  53 #include "insets/InsetLabel.h"
  54 #include "insets/InsetSpecialChar.h"
  55
  56 #include "support/debug.h"
  57 #include "support/docstring_list.h"
  58 #include "support/ExceptionMessage.h"
  59 #include "support/gettext.h"
  60 #include "support/lassert.h"
  61 #include "support/lstrings.h"
  62 #include "support/textutils.h"
  63
  64 #include <sstream>
  65 #include <vector>
  66
  67 using namespace std;
  68 using namespace lyx::support;
  69
  70 namespace lyx {
  71
  72 namespace {
  73 /// Inset identifier (above 0x10ffff, for ucs-4)
  74 char_type const META_INSET = 0x200001;
  75 }
  76
  77
  78 /////////////////////////////////////////////////////////////////////
  79 //
  80 // SpellResultRange
  81 //
  82 /////////////////////////////////////////////////////////////////////
  83
  84 class SpellResultRange {
  85 public:
  86         SpellResultRange(FontSpan range, SpellChecker::Result result)
  87         : range_(range), result_(result)
  88         {}
  89         ///
  90         FontSpan const & range() const { return range_; }
  91         ///
  92         void range(FontSpan const & r) { range_ = r; }
  93         ///
  94         SpellChecker::Result result() const { return result_; }
  95         ///
  96         void result(SpellChecker::Result r) { result_ = r; }
  97         ///
  98         bool inside(pos_type pos) const { return range_.inside(pos); }
  99         ///
 100         bool covered(FontSpan const & r) const
 101         {
 102                 // 1. first of new range inside current range or
 103                 // 2. last of new range inside current range or
 104                 // 3. first of current range inside new range or
 105                 // 4. last of current range inside new range
 106                 return range_.inside(r.first) || range_.inside(r.last) ||
 107                         r.inside(range_.first) || r.inside(range_.last);
 108         }
 109         ///
 110         void shift(pos_type pos, int offset)
 111         {
 112                 if (range_.first > pos) {
 113                         range_.first += offset;
 114                         range_.last += offset;
 115                 } else if (range_.last > pos) {
 116                         range_.last += offset;
 117                 }
 118         }
 119 private:
 120         FontSpan range_ ;
 121         SpellChecker::Result result_ ;
 122 };
 123
 124
 125 /////////////////////////////////////////////////////////////////////
 126 //
 127 // SpellCheckerState
 128 //
 129 /////////////////////////////////////////////////////////////////////
 130
 131 class SpellCheckerState {
 132 public:
 133         SpellCheckerState() {
 134                 needs_refresh_ = true;
 135                 current_change_number_ = 0;
 136         }
 137
 138         void setRange(FontSpan const fp, SpellChecker::Result state)
 139         {
 140                 Ranges result;
 141                 RangesIterator et = ranges_.end();
 142                 RangesIterator it = ranges_.begin();
 143                 for (; it != et; ++it) {
 144                         if (!it->covered(fp))
 145                                 result.push_back(SpellResultRange(it->range(), it->result()));
 146                         else if (state == SpellChecker::WORD_OK) {
 147                                 // trim or split the current misspelled range
 148                                 // store misspelled ranges only
 149                                 FontSpan range = it->range();
 150                                 if (fp.first > range.first) {
 151                                         // misspelled area in front of WORD_OK
 152                                         range.last = fp.first - 1;
 153                                         result.push_back(SpellResultRange(range, it->result()));
 154                                         range = it->range();
 155                                 }
 156                                 if (fp.last < range.last) {
 157                                         // misspelled area after WORD_OK range
 158                                         range.first = fp.last + 1;
 159                                         result.push_back(SpellResultRange(range, it->result()));
 160                                 }
 161                         }
 162                 }
 163                 ranges_ = result;
 164                 if (state != SpellChecker::WORD_OK)
 165                         ranges_.push_back(SpellResultRange(fp, state));
 166         }
 167
 168         void increasePosAfterPos(pos_type pos)
 169         {
 170                 correctRangesAfterPos(pos, 1);
 171                 needsRefresh(pos);
 172         }
 173
 174         void decreasePosAfterPos(pos_type pos)
 175         {
 176                 correctRangesAfterPos(pos, -1);
 177                 needsRefresh(pos);
 178         }
 179
 180         void refreshLast(pos_type pos)
 181         {
 182                 if (pos < refresh_.last)
 183                         refresh_.last = pos;
 184         }
 185
 186         SpellChecker::Result getState(pos_type pos) const
 187         {
 188                 SpellChecker::Result result = SpellChecker::WORD_OK;
 189                 RangesIterator et = ranges_.end();
 190                 RangesIterator it = ranges_.begin();
 191                 for (; it != et; ++it) {
 192                         if(it->inside(pos)) {
 193                                 return it->result();
 194                         }
 195                 }
 196                 return result;
 197         }
 198
 199         FontSpan const & getRange(pos_type pos) const
 200         {
 201                 /// empty span to indicate mismatch
 202                 static FontSpan empty_;
 203                 RangesIterator et = ranges_.end();
 204                 RangesIterator it = ranges_.begin();
 205                 for (; it != et; ++it) {
 206                         if(it->inside(pos)) {
 207                                 return it->range();
 208                         }
 209                 }
 210                 return empty_;
 211         }
 212
 213         bool needsRefresh() const {
 214                 return needs_refresh_;
 215         }
 216
 217         SpellChecker::ChangeNumber currentChangeNumber() const {
 218                 return current_change_number_;
 219         }
 220
 221         void refreshRange(pos_type & first, pos_type & last) const {
 222                 first = refresh_.first;
 223                 last = refresh_.last;
 224         }
 225
 226         void needsRefresh(pos_type pos) {
 227                 if (needs_refresh_ && pos != -1) {
 228                         if (pos < refresh_.first)
 229                                 refresh_.first = pos;
 230                         if (pos > refresh_.last)
 231                                 refresh_.last = pos;
 232                 } else if (pos != -1) {
 233                         // init request check for neighbour positions too
 234                         refresh_.first = pos > 0 ? pos - 1 : 0;
 235                         // no need for special end of paragraph check
 236                         refresh_.last = pos + 1;
 237                 }
 238                 needs_refresh_ = pos != -1;
 239         }
 240
 241         void needsCompleteRefresh(SpellChecker::ChangeNumber change_number) {
 242                 needs_refresh_ = true;
 243                 refresh_.first = 0;
 244                 refresh_.last = -1;
 245                 current_change_number_ = change_number;
 246         }
 247
 248 private:
 249         typedef vector<SpellResultRange> Ranges;
 250         typedef Ranges::const_iterator RangesIterator;
 251         Ranges ranges_;
 252         /// the area of the paragraph with pending spell check
 253         FontSpan refresh_;
 254         bool needs_refresh_;
 255         /// spell state cache version number
 256         SpellChecker::ChangeNumber current_change_number_;
 257
 258
 259         void correctRangesAfterPos(pos_type pos, int offset)
 260         {
 261                 RangesIterator et = ranges_.end();
 262                 Ranges::iterator it = ranges_.begin();
 263                 for (; it != et; ++it) {
 264                         it->shift(pos, offset);
 265                 }
 266         }
 267
 268 };
 269
 270 /////////////////////////////////////////////////////////////////////
 271 //
 272 // Paragraph::Private
 273 //
 274 /////////////////////////////////////////////////////////////////////
 275
 276 class Paragraph::Private
 277 {
 278 public:
 279         ///
 280         Private(Paragraph * owner, Layout const & layout);
 281         /// "Copy constructor"
 282         Private(Private const &, Paragraph * owner);
 283         /// Copy constructor from \p beg  to \p end
 284         Private(Private const &, Paragraph * owner, pos_type beg, pos_type end);
 285
 286         ///
 287         void insertChar(pos_type pos, char_type c, Change const & change);
 288
 289         /// Output the surrogate pair formed by \p c and \p next to \p os.
 290         /// \return the number of characters written.
 291         int latexSurrogatePair(odocstream & os, char_type c, char_type next,
 292                                OutputParams const &);
 293
 294         /// Output a space in appropriate formatting (or a surrogate pair
 295         /// if the next character is a combining character).
 296         /// \return whether a surrogate pair was output.
 297         bool simpleTeXBlanks(OutputParams const &,
 298                              odocstream &, TexRow & texrow,
 299                              pos_type i,
 300                              unsigned int & column,
 301                              Font const & font,
 302                              Layout const & style);
 303
 304         /// Output consecutive unicode chars, belonging to the same script as
 305         /// specified by the latex macro \p ltx, to \p os starting from \p i.
 306         /// \return the number of characters written.
 307         int writeScriptChars(odocstream & os, docstring const & ltx,
 308                            Change const &, Encoding const &, pos_type & i);
 309
 310         /// This could go to ParagraphParameters if we want to.
 311         int startTeXParParams(BufferParams const &, odocstream &, TexRow &,
 312                               OutputParams const &) const;
 313
 314         /// This could go to ParagraphParameters if we want to.
 315         int endTeXParParams(BufferParams const &, odocstream &, TexRow &,
 316                             OutputParams const &) const;
 317
 318         ///
 319         void latexInset(BufferParams const &,
 320                                    odocstream &,
 321                                    TexRow & texrow, OutputParams &,
 322                                    Font & running_font,
 323                                    Font & basefont,
 324                                    Font const & outerfont,
 325                                    bool & open_font,
 326                                    Change & running_change,
 327                                    Layout const & style,
 328                                    pos_type & i,
 329                                    unsigned int & column);
 330
 331         ///
 332         void latexSpecialChar(
 333                                    odocstream & os,
 334                                    OutputParams const & runparams,
 335                                    Font const & running_font,
 336                                    Change const & running_change,
 337                                    Layout const & style,
 338                                    pos_type & i,
 339                                    unsigned int & column);
 340
 341         ///
 342         bool latexSpecialT1(
 343                 char_type const c,
 344                 odocstream & os,
 345                 pos_type i,
 346                 unsigned int & column);
 347         ///
 348         bool latexSpecialTypewriter(
 349                 char_type const c,
 350                 odocstream & os,
 351                 pos_type i,
 352                 unsigned int & column);
 353         ///
 354         bool latexSpecialPhrase(
 355                 odocstream & os,
 356                 pos_type & i,
 357                 unsigned int & column,
 358                 OutputParams const & runparams);
 359
 360         ///
 361         void validate(LaTeXFeatures & features) const;
 362
 363         /// Checks if the paragraph contains only text and no inset or font change.
 364         bool onlyText(Buffer const & buf, Font const & outerfont,
 365                       pos_type initial) const;
 366
 367         /// match a string against a particular point in the paragraph
 368         bool isTextAt(string const & str, pos_type pos) const;
 369
 370         /// a vector of speller skip positions
 371         typedef vector<FontSpan> SkipPositions;
 372         typedef SkipPositions::const_iterator SkipPositionsIterator;
 373
 374         void appendSkipPosition(SkipPositions & skips, pos_type const pos) const;
 375
 376         Language * getSpellLanguage(pos_type const from) const;
 377
 378         Language * locateSpellRange(pos_type & from, pos_type & to,
 379                                                                 SkipPositions & skips) const;
 380
 381         bool hasSpellerChange() const {
 382                 SpellChecker::ChangeNumber speller_change_number = 0;
 383                 if (theSpellChecker())
 384                         speller_change_number = theSpellChecker()->changeNumber();
 385                 return speller_change_number > speller_state_.currentChangeNumber();
 386         }
 387
 388         bool ignoreWord(docstring const & word) const ;
 389
 390         void setMisspelled(pos_type from, pos_type to, SpellChecker::Result state)
 391         {
 392                 pos_type textsize = owner_->size();
 393                 // check for sane arguments
 394                 if (to < from || from >= textsize)
 395                         return;
 396                 FontSpan fp = FontSpan(from, to);
 397                 // don't mark end of paragraph
 398                 if (fp.last >= textsize)
 399                         fp.last = textsize - 1;
 400                 speller_state_.setRange(fp, state);
 401         }
 402
 403         void requestSpellCheck(pos_type pos) {
 404                 speller_state_.needsRefresh(pos);
 405         }
 406
 407         void readySpellCheck() {
 408                 speller_state_.needsRefresh(-1);
 409         }
 410
 411         bool needsSpellCheck() const
 412         {
 413                 return speller_state_.needsRefresh();
 414         }
 415
 416         void rangeOfSpellCheck(pos_type & first, pos_type & last) const
 417         {
 418                 speller_state_.refreshRange(first, last);
 419                 if (last == -1) {
 420                         last = owner_->size();
 421                         return;
 422                 }
 423                 pos_type endpos = last;
 424                 owner_->locateWord(first, endpos, WHOLE_WORD);
 425                 if (endpos < last) {
 426                         endpos = last;
 427                         owner_->locateWord(last, endpos, WHOLE_WORD);
 428                 }
 429                 last = endpos;
 430         }
 431
 432         int countSkips(SkipPositionsIterator & it, SkipPositionsIterator const et,
 433                             int & start) const
 434         {
 435                 int numskips = 0;
 436                 while (it != et && it->first < start) {
 437                         int skip = it->last - it->first + 1;
 438                         start += skip;
 439                         numskips += skip;
 440                         ++it;
 441                 }
 442                 return numskips;
 443         }
 444
 445         void markMisspelledWords(pos_type const & first, pos_type const & last,
 446                                                          SpellChecker::Result result,
 447                                                          docstring const & word,
 448                                                          SkipPositions const & skips);
 449
 450         InsetCode ownerCode() const
 451         {
 452                 return inset_owner_ ? inset_owner_->lyxCode() : NO_CODE;
 453         }
 454
 455         /// Which Paragraph owns us?
 456         Paragraph * owner_;
 457
 458         /// In which Inset?
 459         Inset const * inset_owner_;
 460
 461         ///
 462         FontList fontlist_;
 463
 464         ///
 465         int id_;
 466
 467         ///
 468         ParagraphParameters params_;
 469
 470         /// for recording and looking up changes
 471         Changes changes_;
 472
 473         ///
 474         InsetList insetlist_;
 475
 476         /// end of label
 477         pos_type begin_of_body_;
 478
 479         typedef docstring TextContainer;
 480         ///
 481         TextContainer text_;
 482
 483         typedef set<docstring> Words;
 484         typedef map<Language, Words> LangWordsMap;
 485         ///
 486         LangWordsMap words_;
 487         ///
 488         Layout const * layout_;
 489         ///
 490         SpellCheckerState speller_state_;
 491 };
 492
 493
 494 namespace {
 495
 496 struct special_phrase {
 497         string phrase;
 498         docstring macro;
 499         bool builtin;
 500 };
 501
 502 special_phrase const special_phrases[] = {
 503         { "LyX", from_ascii("\\LyX{}"), false },
 504         { "TeX", from_ascii("\\TeX{}"), true },
 505         { "LaTeX2e", from_ascii("\\LaTeXe{}"), true },
 506         { "LaTeX", from_ascii("\\LaTeX{}"), true },
 507 };
 508
 509 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
 510
 511 } // namespace anon
 512
 513
 514 Paragraph::Private::Private(Paragraph * owner, Layout const & layout)
 515         : owner_(owner), inset_owner_(0), id_(-1), begin_of_body_(0), layout_(&layout)
 516 {
 517         text_.reserve(100);
 518 }
 519
 520
 521 // Initialization of the counter for the paragraph id's,
 522 //
 523 // FIXME: There should be a more intelligent way to generate and use the
 524 // paragraph ids per buffer instead a global static counter for all InsetText
 525 // in the running program.
 526 static int paragraph_id = -1;
 527
 528 Paragraph::Private::Private(Private const & p, Paragraph * owner)
 529         : owner_(owner), inset_owner_(p.inset_owner_), fontlist_(p.fontlist_),
 530           params_(p.params_), changes_(p.changes_), insetlist_(p.insetlist_),
 531           begin_of_body_(p.begin_of_body_), text_(p.text_), words_(p.words_),
 532           layout_(p.layout_)
 533 {
 534         id_ = ++paragraph_id;
 535         requestSpellCheck(p.text_.size());
 536 }
 537
 538
 539 Paragraph::Private::Private(Private const & p, Paragraph * owner,
 540         pos_type beg, pos_type end)
 541         : owner_(owner), inset_owner_(p.inset_owner_),
 542           params_(p.params_), changes_(p.changes_),
 543           insetlist_(p.insetlist_, beg, end),
 544           begin_of_body_(p.begin_of_body_), words_(p.words_),
 545           layout_(p.layout_)
 546 {
 547         id_ = ++paragraph_id;
 548         if (beg >= pos_type(p.text_.size()))
 549                 return;
 550         text_ = p.text_.substr(beg, end - beg);
 551
 552         FontList::const_iterator fcit = fontlist_.begin();
 553         FontList::const_iterator fend = fontlist_.end();
 554         for (; fcit != fend; ++fcit) {
 555                 if (fcit->pos() < beg)
 556                         continue;
 557                 if (fcit->pos() >= end) {
 558                         // Add last entry in the fontlist_.
 559                         fontlist_.set(text_.size() - 1, fcit->font());
 560                         break;
 561                 }
 562                 // Add a new entry in the fontlist_.
 563                 fontlist_.set(fcit->pos() - beg, fcit->font());
 564         }
 565         requestSpellCheck(p.text_.size());
 566 }
 567
 568
 569 void Paragraph::addChangesToToc(DocIterator const & cdit,
 570         Buffer const & buf) const
 571 {
 572         d->changes_.addToToc(cdit, buf);
 573 }
 574
 575
 576 bool Paragraph::isDeleted(pos_type start, pos_type end) const
 577 {
 578         LASSERT(start >= 0 && start <= size(), /**/);
 579         LASSERT(end > start && end <= size() + 1, /**/);
 580
 581         return d->changes_.isDeleted(start, end);
 582 }
 583
 584
 585 bool Paragraph::isChanged(pos_type start, pos_type end) const
 586 {
 587         LASSERT(start >= 0 && start <= size(), /**/);
 588         LASSERT(end > start && end <= size() + 1, /**/);
 589
 590         return d->changes_.isChanged(start, end);
 591 }
 592
 593
 594 bool Paragraph::isMergedOnEndOfParDeletion(bool trackChanges) const
 595 {
 596         // keep the logic here in sync with the logic of eraseChars()
 597         if (!trackChanges)
 598                 return true;
 599
 600         Change const change = d->changes_.lookup(size());
 601         return change.inserted() && change.currentAuthor();
 602 }
 603
 604
 605 void Paragraph::setChange(Change const & change)
 606 {
 607         // beware of the imaginary end-of-par character!
 608         d->changes_.set(change, 0, size() + 1);
 609
 610         /*
 611          * Propagate the change recursively - but not in case of DELETED!
 612          *
 613          * Imagine that your co-author makes changes in an existing inset. He
 614          * sends your document to you and you come to the conclusion that the
 615          * inset should go completely. If you erase it, LyX must not delete all
 616          * text within the inset. Otherwise, the change tracked insertions of
 617          * your co-author get lost and there is no way to restore them later.
 618          *
 619          * Conclusion: An inset's content should remain untouched if you delete it
 620          */
 621
 622         if (!change.deleted()) {
 623                 for (pos_type pos = 0; pos < size(); ++pos) {
 624                         if (Inset * inset = getInset(pos))
 625                                 inset->setChange(change);
 626                 }
 627         }
 628 }
 629
 630
 631 void Paragraph::setChange(pos_type pos, Change const & change)
 632 {
 633         LASSERT(pos >= 0 && pos <= size(), /**/);
 634         d->changes_.set(change, pos);
 635
 636         // see comment in setChange(Change const &) above
 637         if (!change.deleted() && pos < size())
 638                         if (Inset * inset = getInset(pos))
 639                                 inset->setChange(change);
 640 }
 641
 642
 643 Change const & Paragraph::lookupChange(pos_type pos) const
 644 {
 645         LASSERT(pos >= 0 && pos <= size(), /**/);
 646         return d->changes_.lookup(pos);
 647 }
 648
 649
 650 void Paragraph::acceptChanges(pos_type start, pos_type end)
 651 {
 652         LASSERT(start >= 0 && start <= size(), /**/);
 653         LASSERT(end > start && end <= size() + 1, /**/);
 654
 655         for (pos_type pos = start; pos < end; ++pos) {
 656                 switch (lookupChange(pos).type) {
 657                         case Change::UNCHANGED:
 658                                 // accept changes in nested inset
 659                                 if (Inset * inset = getInset(pos))
 660                                         inset->acceptChanges();
 661                                 break;
 662
 663                         case Change::INSERTED:
 664                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 665                                 // also accept changes in nested inset
 666                                 if (Inset * inset = getInset(pos))
 667                                         inset->acceptChanges();
 668                                 break;
 669
 670                         case Change::DELETED:
 671                                 // Suppress access to non-existent
 672                                 // "end-of-paragraph char"
 673                                 if (pos < size()) {
 674                                         eraseChar(pos, false);
 675                                         --end;
 676                                         --pos;
 677                                 }
 678                                 break;
 679                 }
 680
 681         }
 682 }
 683
 684
 685 void Paragraph::rejectChanges(pos_type start, pos_type end)
 686 {
 687         LASSERT(start >= 0 && start <= size(), /**/);
 688         LASSERT(end > start && end <= size() + 1, /**/);
 689
 690         for (pos_type pos = start; pos < end; ++pos) {
 691                 switch (lookupChange(pos).type) {
 692                         case Change::UNCHANGED:
 693                                 // reject changes in nested inset
 694                                 if (Inset * inset = getInset(pos))
 695                                                 inset->rejectChanges();
 696                                 break;
 697
 698                         case Change::INSERTED:
 699                                 // Suppress access to non-existent
 700                                 // "end-of-paragraph char"
 701                                 if (pos < size()) {
 702                                         eraseChar(pos, false);
 703                                         --end;
 704                                         --pos;
 705                                 }
 706                                 break;
 707
 708                         case Change::DELETED:
 709                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 710
 711                                 // Do NOT reject changes within a deleted inset!
 712                                 // There may be insertions of a co-author inside of it!
 713
 714                                 break;
 715                 }
 716         }
 717 }
 718
 719
 720 void Paragraph::Private::insertChar(pos_type pos, char_type c,
 721                 Change const & change)
 722 {
 723         LASSERT(pos >= 0 && pos <= int(text_.size()), /**/);
 724
 725         // track change
 726         changes_.insert(change, pos);
 727
 728         // This is actually very common when parsing buffers (and
 729         // maybe inserting ascii text)
 730         if (pos == pos_type(text_.size())) {
 731                 // when appending characters, no need to update tables
 732                 text_.push_back(c);
 733                 // but we want spell checking
 734                 requestSpellCheck(pos);
 735                 return;
 736         }
 737
 738         text_.insert(text_.begin() + pos, c);
 739
 740         // Update the font table.
 741         fontlist_.increasePosAfterPos(pos);
 742
 743         // Update the insets
 744         insetlist_.increasePosAfterPos(pos);
 745
 746         // Update list of misspelled positions
 747         speller_state_.increasePosAfterPos(pos);
 748 }
 749
 750
 751 bool Paragraph::insertInset(pos_type pos, Inset * inset,
 752                                    Change const & change)
 753 {
 754         LASSERT(inset, /**/);
 755         LASSERT(pos >= 0 && pos <= size(), /**/);
 756
 757         // Paragraph::insertInset() can be used in cut/copy/paste operation where
 758         // d->inset_owner_ is not set yet.
 759         if (d->inset_owner_ && !d->inset_owner_->insetAllowed(inset->lyxCode()))
 760                 return false;
 761
 762         d->insertChar(pos, META_INSET, change);
 763         LASSERT(d->text_[pos] == META_INSET, /**/);
 764
 765         // Add a new entry in the insetlist_.
 766         d->insetlist_.insert(inset, pos);
 767
 768         // Some insets require run of spell checker
 769         requestSpellCheck(pos);
 770         return true;
 771 }
 772
 773
 774 bool Paragraph::eraseChar(pos_type pos, bool trackChanges)
 775 {
 776         LASSERT(pos >= 0 && pos <= size(), return false);
 777
 778         // keep the logic here in sync with the logic of isMergedOnEndOfParDeletion()
 779
 780         if (trackChanges) {
 781                 Change change = d->changes_.lookup(pos);
 782
 783                 // set the character to DELETED if
 784                 //  a) it was previously unchanged or
 785                 //  b) it was inserted by a co-author
 786
 787                 if (!change.changed() ||
 788                       (change.inserted() && !change.currentAuthor())) {
 789                         setChange(pos, Change(Change::DELETED));
 790                         // request run of spell checker
 791                         requestSpellCheck(pos);
 792                         return false;
 793                 }
 794
 795                 if (change.deleted())
 796                         return false;
 797         }
 798
 799         // Don't physically access the imaginary end-of-paragraph character.
 800         // eraseChar() can only mark it as DELETED. A physical deletion of
 801         // end-of-par must be handled externally.
 802         if (pos == size()) {
 803                 return false;
 804         }
 805
 806         // track change
 807         d->changes_.erase(pos);
 808
 809         // if it is an inset, delete the inset entry
 810         if (d->text_[pos] == META_INSET)
 811                 d->insetlist_.erase(pos);
 812
 813         d->text_.erase(d->text_.begin() + pos);
 814
 815         // Update the fontlist_
 816         d->fontlist_.erase(pos);
 817
 818         // Update the insetlist_
 819         d->insetlist_.decreasePosAfterPos(pos);
 820
 821         // Update list of misspelled positions
 822         d->speller_state_.decreasePosAfterPos(pos);
 823         d->speller_state_.refreshLast(size());
 824
 825         return true;
 826 }
 827
 828
 829 int Paragraph::eraseChars(pos_type start, pos_type end, bool trackChanges)
 830 {
 831         LASSERT(start >= 0 && start <= size(), /**/);
 832         LASSERT(end >= start && end <= size() + 1, /**/);
 833
 834         pos_type i = start;
 835         for (pos_type count = end - start; count; --count) {
 836                 if (!eraseChar(i, trackChanges))
 837                         ++i;
 838         }
 839         return end - i;
 840 }
 841
 842
 843 int Paragraph::Private::latexSurrogatePair(odocstream & os, char_type c,
 844                 char_type next, OutputParams const & runparams)
 845 {
 846         // Writing next here may circumvent a possible font change between
 847         // c and next. Since next is only output if it forms a surrogate pair
 848         // with c we can ignore this:
 849         // A font change inside a surrogate pair does not make sense and is
 850         // hopefully impossible to input.
 851         // FIXME: change tracking
 852         // Is this correct WRT change tracking?
 853         Encoding const & encoding = *(runparams.encoding);
 854         docstring const latex1 = encoding.latexChar(next);
 855         docstring const latex2 = encoding.latexChar(c);
 856         if (docstring(1, next) == latex1) {
 857                 // the encoding supports the combination
 858                 os << latex2 << latex1;
 859                 return latex1.length() + latex2.length();
 860         } else if (runparams.local_font &&
 861                    runparams.local_font->language()->lang() == "polutonikogreek") {
 862                 // polutonikogreek only works without the brackets
 863                 os << latex1 << latex2;
 864                 return latex1.length() + latex2.length();
 865         } else
 866                 os << latex1 << '{' << latex2 << '}';
 867         return latex1.length() + latex2.length() + 2;
 868 }
 869
 870
 871 bool Paragraph::Private::simpleTeXBlanks(OutputParams const & runparams,
 872                                        odocstream & os, TexRow & texrow,
 873                                        pos_type i,
 874                                        unsigned int & column,
 875                                        Font const & font,
 876                                        Layout const & style)
 877 {
 878         if (style.pass_thru || runparams.pass_thru)
 879                 return false;
 880
 881         if (i + 1 < int(text_.size())) {
 882                 char_type next = text_[i + 1];
 883                 if (Encodings::isCombiningChar(next)) {
 884                         // This space has an accent, so we must always output it.
 885                         column += latexSurrogatePair(os, ' ', next, runparams) - 1;
 886                         return true;
 887                 }
 888         }
 889
 890         if (runparams.linelen > 0
 891             && column > runparams.linelen
 892             && i
 893             && text_[i - 1] != ' '
 894             && (i + 1 < int(text_.size()))
 895             // same in FreeSpacing mode
 896             && !owner_->isFreeSpacing()
 897             // In typewriter mode, we want to avoid
 898             // ! . ? : at the end of a line
 899             && !(font.fontInfo().family() == TYPEWRITER_FAMILY
 900                  && (text_[i - 1] == '.'
 901                      || text_[i - 1] == '?'
 902                      || text_[i - 1] == ':'
 903                      || text_[i - 1] == '!'))) {
 904                 os << '\n';
 905                 texrow.newline();
 906                 texrow.start(owner_->id(), i + 1);
 907                 column = 0;
 908         } else if (style.free_spacing) {
 909                 os << '~';
 910         } else {
 911                 os << ' ';
 912         }
 913         return false;
 914 }
 915
 916
 917 int Paragraph::Private::writeScriptChars(odocstream & os,
 918                                          docstring const & ltx,
 919                                          Change const & runningChange,
 920                                          Encoding const & encoding,
 921                                          pos_type & i)
 922 {
 923         // FIXME: modifying i here is not very nice...
 924
 925         // We only arrive here when a proper language for character text_[i] has
 926         // not been specified (i.e., it could not be translated in the current
 927         // latex encoding) or its latex translation has been forced, and it
 928         // belongs to a known script.
 929         // Parameter ltx contains the latex translation of text_[i] as specified
 930         // in the unicodesymbols file and is something like "\textXXX{<spec>}".
 931         // The latex macro name "textXXX" specifies the script to which text_[i]
 932         // belongs and we use it in order to check whether characters from the
 933         // same script immediately follow, such that we can collect them in a
 934         // single "\textXXX" macro. So, we have to retain "\textXXX{<spec>"
 935         // for the first char but only "<spec>" for all subsequent chars.
 936         docstring::size_type const brace1 = ltx.find_first_of(from_ascii("{"));
 937         docstring::size_type const brace2 = ltx.find_last_of(from_ascii("}"));
 938         string script = to_ascii(ltx.substr(1, brace1 - 1));
 939         int pos = 0;
 940         int length = brace2;
 941         bool closing_brace = true;
 942         if (script == "textgreek" && encoding.latexName() == "iso-8859-7") {
 943                 // Correct encoding is being used, so we can avoid \textgreek.
 944                 pos = brace1 + 1;
 945                 length -= pos;
 946                 closing_brace = false;
 947         }
 948         os << ltx.substr(pos, length);
 949         int size = text_.size();
 950         while (i + 1 < size) {
 951                 char_type const next = text_[i + 1];
 952                 // Stop here if next character belongs to another script
 953                 // or there is a change in change tracking status.
 954                 if (!Encodings::isKnownScriptChar(next, script) ||
 955                     runningChange != owner_->lookupChange(i + 1))
 956                         break;
 957                 Font prev_font;
 958                 bool found = false;
 959                 FontList::const_iterator cit = fontlist_.begin();
 960                 FontList::const_iterator end = fontlist_.end();
 961                 for (; cit != end; ++cit) {
 962                         if (cit->pos() >= i && !found) {
 963                                 prev_font = cit->font();
 964                                 found = true;
 965                         }
 966                         if (cit->pos() >= i + 1)
 967                                 break;
 968                 }
 969                 // Stop here if there is a font attribute or encoding change.
 970                 if (found && cit != end && prev_font != cit->font())
 971                         break;
 972                 docstring const latex = encoding.latexChar(next);
 973                 docstring::size_type const b1 =
 974                                         latex.find_first_of(from_ascii("{"));
 975                 docstring::size_type const b2 =
 976                                         latex.find_last_of(from_ascii("}"));
 977                 int const len = b2 - b1 - 1;
 978                 os << latex.substr(b1 + 1, len);
 979                 length += len;
 980                 ++i;
 981         }
 982         if (closing_brace) {
 983                 os << '}';
 984                 ++length;
 985         }
 986         return length;
 987 }
 988
 989
 990 bool Paragraph::Private::isTextAt(string const & str, pos_type pos) const
 991 {
 992         pos_type const len = str.length();
 993
 994         // is the paragraph large enough?
 995         if (pos + len > int(text_.size()))
 996                 return false;
 997
 998         // does the wanted text start at point?
 999         for (string::size_type i = 0; i < str.length(); ++i) {
1000                 // Caution: direct comparison of characters works only
1001                 // because str is pure ASCII.
1002                 if (str[i] != text_[pos + i])
1003                         return false;
1004         }
1005
1006         return fontlist_.hasChangeInRange(pos, len);
1007 }
1008
1009
1010 void Paragraph::Private::latexInset(BufferParams const & bparams,
1011                                     odocstream & os,
1012                                     TexRow & texrow,
1013                                     OutputParams & runparams,
1014                                     Font & running_font,
1015                                     Font & basefont,
1016                                     Font const & outerfont,
1017                                     bool & open_font,
1018                                     Change & running_change,
1019                                     Layout const & style,
1020                                     pos_type & i,
1021                                     unsigned int & column)
1022 {
1023         Inset * inset = owner_->getInset(i);
1024         LASSERT(inset, /**/);
1025
1026         if (style.pass_thru) {
1027                 inset->plaintext(os, runparams);
1028                 return;
1029         }
1030
1031         // FIXME: move this to InsetNewline::latex
1032         if (inset->lyxCode() == NEWLINE_CODE) {
1033                 // newlines are handled differently here than
1034                 // the default in simpleTeXSpecialChars().
1035                 if (!style.newline_allowed) {
1036                         os << '\n';
1037                 } else {
1038                         if (open_font) {
1039                                 column += running_font.latexWriteEndChanges(
1040                                         os, bparams, runparams,
1041                                         basefont, basefont);
1042                                 open_font = false;
1043                         }
1044
1045                         if (running_font.fontInfo().family() == TYPEWRITER_FAMILY)
1046                                 os << '~';
1047
1048                         basefont = owner_->getLayoutFont(bparams, outerfont);
1049                         running_font = basefont;
1050
1051                         if (runparams.moving_arg)
1052                                 os << "\\protect ";
1053
1054                 }
1055                 texrow.newline();
1056                 texrow.start(owner_->id(), i + 1);
1057                 column = 0;
1058         }
1059
1060         if (owner_->isDeleted(i)) {
1061                 if( ++runparams.inDeletedInset == 1)
1062                         runparams.changeOfDeletedInset = owner_->lookupChange(i);
1063         }
1064
1065         if (inset->canTrackChanges()) {
1066                 column += Changes::latexMarkChange(os, bparams, running_change,
1067                         Change(Change::UNCHANGED), runparams);
1068                 running_change = Change(Change::UNCHANGED);
1069         }
1070
1071         bool close = false;
1072         odocstream::pos_type const len = os.tellp();
1073
1074         if (inset->forceLTR()
1075             && running_font.isRightToLeft()
1076             // ERT is an exception, it should be output with no
1077             // decorations at all
1078             && inset->lyxCode() != ERT_CODE) {
1079                 if (running_font.language()->lang() == "farsi")
1080                         os << "\\beginL{}";
1081                 else
1082                         os << "\\L{";
1083                 close = true;
1084         }
1085
1086         // FIXME: Bug: we can have an empty font change here!
1087         // if there has just been a font change, we are going to close it
1088         // right now, which means stupid latex code like \textsf{}. AFAIK,
1089         // this does not harm dvi output. A minor bug, thus (JMarc)
1090
1091         // Some insets cannot be inside a font change command.
1092         // However, even such insets *can* be placed in \L or \R
1093         // or their equivalents (for RTL language switches), so we don't
1094         // close the language in those cases.
1095         // ArabTeX, though, cannot handle this special behavior, it seems.
1096         bool arabtex = basefont.language()->lang() == "arabic_arabtex"
1097                 || running_font.language()->lang() == "arabic_arabtex";
1098         if (open_font && inset->noFontChange()) {
1099                 bool closeLanguage = arabtex
1100                         || basefont.isRightToLeft() == running_font.isRightToLeft();
1101                 unsigned int count = running_font.latexWriteEndChanges(os,
1102                         bparams, runparams, basefont, basefont, closeLanguage);
1103                 column += count;
1104                 // if any font properties were closed, update the running_font,
1105                 // making sure, however, to leave the language as it was
1106                 if (count > 0) {
1107                         // FIXME: probably a better way to keep track of the old
1108                         // language, than copying the entire font?
1109                         Font const copy_font(running_font);
1110                         basefont = owner_->getLayoutFont(bparams, outerfont);
1111                         running_font = basefont;
1112                         if (!closeLanguage)
1113                                 running_font.setLanguage(copy_font.language());
1114                         // leave font open if language is still open
1115                         open_font = (running_font.language() == basefont.language());
1116                         if (closeLanguage)
1117                                 runparams.local_font = &basefont;
1118                 }
1119         }
1120
1121         int tmp;
1122
1123         try {
1124                 tmp = inset->latex(os, runparams);
1125         } catch (EncodingException & e) {
1126                 // add location information and throw again.
1127                 e.par_id = id_;
1128                 e.pos = i;
1129                 throw(e);
1130         }
1131
1132         if (close) {
1133                 if (running_font.language()->lang() == "farsi")
1134                                 os << "\\endL{}";
1135                         else
1136                                 os << '}';
1137         }
1138
1139         if (tmp) {
1140                 texrow.newlines(tmp);
1141                 texrow.start(owner_->id(), i + 1);
1142                 column = 0;
1143         } else {
1144                 column += (unsigned int)(os.tellp() - len);
1145         }
1146
1147         if (owner_->isDeleted(i))
1148                 --runparams.inDeletedInset;
1149 }
1150
1151
1152 void Paragraph::Private::latexSpecialChar(
1153                                              odocstream & os,
1154                                              OutputParams const & runparams,
1155                                              Font const & running_font,
1156                                              Change const & running_change,
1157                                              Layout const & style,
1158                                              pos_type & i,
1159                                              unsigned int & column)
1160 {
1161         char_type const c = text_[i];
1162
1163         if (style.pass_thru || runparams.pass_thru) {
1164                 if (c != '\0')
1165                         // FIXME UNICODE: This can fail if c cannot
1166                         // be encoded in the current encoding.
1167                         os.put(c);
1168                 return;
1169         }
1170
1171         // If T1 font encoding is used, use the special
1172         // characters it provides.
1173         // NOTE: some languages reset the font encoding
1174         // internally
1175         if (!running_font.language()->internalFontEncoding()
1176             && lyxrc.fontenc == "T1" && latexSpecialT1(c, os, i, column))
1177                 return;
1178
1179         // \tt font needs special treatment
1180         if (running_font.fontInfo().family() == TYPEWRITER_FAMILY
1181                 && latexSpecialTypewriter(c, os, i, column))
1182                 return;
1183
1184         // Otherwise, we use what LaTeX provides us.
1185         switch (c) {
1186         case '\\':
1187                 os << "\\textbackslash{}";
1188                 column += 15;
1189                 break;
1190         case '<':
1191                 os << "\\textless{}";
1192                 column += 10;
1193                 break;
1194         case '>':
1195                 os << "\\textgreater{}";
1196                 column += 13;
1197                 break;
1198         case '|':
1199                 os << "\\textbar{}";
1200                 column += 9;
1201                 break;
1202         case '-':
1203                 os << '-';
1204                 break;
1205         case '\"':
1206                 os << "\\char`\\\"{}";
1207                 column += 9;
1208                 break;
1209
1210         case '$': case '&':
1211         case '%': case '#': case '{':
1212         case '}': case '_':
1213                 os << '\\';
1214                 os.put(c);
1215                 column += 1;
1216                 break;
1217
1218         case '~':
1219                 os << "\\textasciitilde{}";
1220                 column += 16;
1221                 break;
1222
1223         case '^':
1224                 os << "\\textasciicircum{}";
1225                 column += 17;
1226                 break;
1227
1228         case '*':
1229         case '[':
1230         case ']':
1231                 // avoid being mistaken for optional arguments
1232                 os << '{';
1233                 os.put(c);
1234                 os << '}';
1235                 column += 2;
1236                 break;
1237
1238         case ' ':
1239                 // Blanks are printed before font switching.
1240                 // Sure? I am not! (try nice-latex)
1241                 // I am sure it's correct. LyX might be smarter
1242                 // in the future, but for now, nothing wrong is
1243                 // written. (Asger)
1244                 break;
1245
1246         default:
1247                 // LyX, LaTeX etc.
1248                 if (latexSpecialPhrase(os, i, column, runparams))
1249                         return;
1250
1251                 if (c == '\0')
1252                         return;
1253
1254                 Encoding const & encoding = *(runparams.encoding);
1255                 if (i + 1 < int(text_.size())) {
1256                         char_type next = text_[i + 1];
1257                         if (Encodings::isCombiningChar(next)) {
1258                                 column += latexSurrogatePair(os, c, next, runparams) - 1;
1259                                 ++i;
1260                                 break;
1261                         }
1262                 }
1263                 string script;
1264                 docstring const latex = encoding.latexChar(c);
1265                 if (Encodings::isKnownScriptChar(c, script)
1266                     && prefixIs(latex, from_ascii("\\" + script)))
1267                         column += writeScriptChars(os, latex,
1268                                         running_change, encoding, i) - 1;
1269                 else if (latex.length() > 1 && latex[latex.length() - 1] != '}') {
1270                         // Prevent eating of a following
1271                         // space or command corruption by
1272                         // following characters
1273                         column += latex.length() + 1;
1274                         os << latex << "{}";
1275                 } else {
1276                         column += latex.length() - 1;
1277                         os << latex;
1278                 }
1279                 break;
1280         }
1281 }
1282
1283
1284 bool Paragraph::Private::latexSpecialT1(char_type const c, odocstream & os,
1285         pos_type i, unsigned int & column)
1286 {
1287         switch (c) {
1288         case '>':
1289         case '<':
1290                 os.put(c);
1291                 // In T1 encoding, these characters exist
1292                 // but we should avoid ligatures
1293                 if (i + 1 >= int(text_.size()) || text_[i + 1] != c)
1294                         return true;
1295                 os << "\\textcompwordmark{}";
1296                 column += 19;
1297                 return true;
1298         case '|':
1299                 os.put(c);
1300                 return true;
1301         case '\"':
1302                 // soul.sty breaks with \char`\"
1303                 os << "\\textquotedbl{}";
1304                 column += 14;
1305                 return true;
1306         default:
1307                 return false;
1308         }
1309 }
1310
1311
1312 bool Paragraph::Private::latexSpecialTypewriter(char_type const c, odocstream & os,
1313         pos_type i, unsigned int & column)
1314 {
1315         switch (c) {
1316         case '-':
1317                 // within \ttfamily, "--" is merged to "-" (no endash)
1318                 // so we avoid this rather irritating ligature
1319                 if (i + 1 < int(text_.size()) && text_[i + 1] == '-') {
1320                         os << "-{}";
1321                         column += 2;
1322                 } else
1323                         os << '-';
1324                 return true;
1325
1326         // everything else has to be checked separately
1327         // (depending on the encoding)
1328         default:
1329                 return false;
1330         }
1331 }
1332
1333
1334 bool Paragraph::Private::latexSpecialPhrase(odocstream & os, pos_type & i,
1335         unsigned int & column, OutputParams const & runparams)
1336 {
1337         // FIXME: if we have "LaTeX" with a font
1338         // change in the middle (before the 'T', then
1339         // the "TeX" part is still special cased.
1340         // Really we should only operate this on
1341         // "words" for some definition of word
1342
1343         for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
1344                 if (!isTextAt(special_phrases[pnr].phrase, i))
1345                         continue;
1346                 if (runparams.moving_arg)
1347                         os << "\\protect";
1348                 os << special_phrases[pnr].macro;
1349                 i += special_phrases[pnr].phrase.length() - 1;
1350                 column += special_phrases[pnr].macro.length() - 1;
1351                 return true;
1352         }
1353         return false;
1354 }
1355
1356
1357 void Paragraph::Private::validate(LaTeXFeatures & features) const
1358 {
1359         if (layout_->inpreamble && inset_owner_) {
1360                 bool const is_command = layout_->latextype == LATEX_COMMAND;
1361                 Buffer const & buf = inset_owner_->buffer();
1362                 BufferParams const & bp = buf.params();
1363                 Font f;
1364                 TexRow tr;
1365                 // Using a string stream here circumvents the encoding
1366                 // switching machinery of odocstream. Therefore the
1367                 // output is wrong if this paragraph contains content
1368                 // that needs to switch encoding.
1369                 odocstringstream ods;
1370                 if (is_command) {
1371                         ods << '\\' << from_ascii(layout_->latexname());
1372                         // we have to provide all the optional arguments here, even though
1373                         // the last one is the only one we care about.
1374                         // Separate handling of optional argument inset.
1375                         if (layout_->optargs != 0 || layout_->reqargs != 0)
1376                                 latexArgInsets(*owner_, ods, features.runparams(),
1377                                                                                          layout_->reqargs, layout_->optargs);
1378                         else
1379                                 ods << from_ascii(layout_->latexparam());
1380                 }
1381                 docstring::size_type const length = ods.str().length();
1382                 // this will output "{" at the beginning, but not at the end
1383                 owner_->latex(bp, f, ods, tr, features.runparams(), 0, -1, true);
1384                 if (ods.str().length() > length) {
1385                         if (is_command)
1386                                 ods << '}';
1387                         string const snippet = to_utf8(ods.str());
1388                         features.addPreambleSnippet(snippet);
1389                 }
1390         }
1391
1392         if (features.runparams().flavor == OutputParams::HTML
1393             && layout_->htmltitle()) {
1394                 features.setHTMLTitle(owner_->asString(AS_STR_INSETS));
1395         }
1396
1397         // check the params.
1398         if (!params_.spacing().isDefault())
1399                 features.require("setspace");
1400
1401         // then the layouts
1402         features.useLayout(layout_->name());
1403
1404         // then the fonts
1405         fontlist_.validate(features);
1406
1407         // then the indentation
1408         if (!params_.leftIndent().zero())
1409                 features.require("ParagraphLeftIndent");
1410
1411         // then the insets
1412         InsetList::const_iterator icit = insetlist_.begin();
1413         InsetList::const_iterator iend = insetlist_.end();
1414         for (; icit != iend; ++icit) {
1415                 if (icit->inset) {
1416                         icit->inset->validate(features);
1417                         if (layout_->needprotect &&
1418                             icit->inset->lyxCode() == FOOT_CODE)
1419                                 features.require("NeedLyXFootnoteCode");
1420                 }
1421         }
1422
1423         // then the contents
1424         for (pos_type i = 0; i < int(text_.size()) ; ++i) {
1425                 for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
1426                         if (!special_phrases[pnr].builtin
1427                             && isTextAt(special_phrases[pnr].phrase, i)) {
1428                                 features.require(special_phrases[pnr].phrase);
1429                                 break;
1430                         }
1431                 }
1432                 Encodings::validate(text_[i], features);
1433         }
1434 }
1435
1436 /////////////////////////////////////////////////////////////////////
1437 //
1438 // Paragraph
1439 //
1440 /////////////////////////////////////////////////////////////////////
1441
1442 namespace {
1443         Layout const emptyParagraphLayout;
1444 }
1445
1446 Paragraph::Paragraph()
1447         : d(new Paragraph::Private(this, emptyParagraphLayout))
1448 {
1449         itemdepth = 0;
1450         d->params_.clear();
1451 }
1452
1453
1454 Paragraph::Paragraph(Paragraph const & par)
1455         : itemdepth(par.itemdepth),
1456         d(new Paragraph::Private(*par.d, this))
1457 {
1458         registerWords();
1459 }
1460
1461
1462 Paragraph::Paragraph(Paragraph const & par, pos_type beg, pos_type end)
1463         : itemdepth(par.itemdepth),
1464         d(new Paragraph::Private(*par.d, this, beg, end))
1465 {
1466         registerWords();
1467 }
1468
1469
1470 Paragraph & Paragraph::operator=(Paragraph const & par)
1471 {
1472         // needed as we will destroy the private part before copying it
1473         if (&par != this) {
1474                 itemdepth = par.itemdepth;
1475
1476                 deregisterWords();
1477                 delete d;
1478                 d = new Private(*par.d, this);
1479                 registerWords();
1480         }
1481         return *this;
1482 }
1483
1484
1485 Paragraph::~Paragraph()
1486 {
1487         deregisterWords();
1488         delete d;
1489 }
1490
1491
1492 namespace {
1493
1494 // this shall be called just before every "os << ..." action.
1495 void flushString(ostream & os, docstring & s)
1496 {
1497         os << to_utf8(s);
1498         s.erase();
1499 }
1500
1501 }
1502
1503
1504 void Paragraph::write(ostream & os, BufferParams const & bparams,
1505         depth_type & dth) const
1506 {
1507         // The beginning or end of a deeper (i.e. nested) area?
1508         if (dth != d->params_.depth()) {
1509                 if (d->params_.depth() > dth) {
1510                         while (d->params_.depth() > dth) {
1511                                 os << "\n\\begin_deeper";
1512                                 ++dth;
1513                         }
1514                 } else {
1515                         while (d->params_.depth() < dth) {
1516                                 os << "\n\\end_deeper";
1517                                 --dth;
1518                         }
1519                 }
1520         }
1521
1522         // First write the layout
1523         os << "\n\\begin_layout " << to_utf8(d->layout_->name()) << '\n';
1524
1525         d->params_.write(os);
1526
1527         Font font1(inherit_font, bparams.language);
1528
1529         Change running_change = Change(Change::UNCHANGED);
1530
1531         // this string is used as a buffer to avoid repetitive calls
1532         // to to_utf8(), which turn out to be expensive (JMarc)
1533         docstring write_buffer;
1534
1535         int column = 0;
1536         for (pos_type i = 0; i <= size(); ++i) {
1537
1538                 Change const change = lookupChange(i);
1539                 if (change != running_change)
1540                         flushString(os, write_buffer);
1541                 Changes::lyxMarkChange(os, bparams, column, running_change, change);
1542                 running_change = change;
1543
1544                 if (i == size())
1545                         break;
1546
1547                 // Write font changes
1548                 Font font2 = getFontSettings(bparams, i);
1549                 if (font2 != font1) {
1550                         flushString(os, write_buffer);
1551                         font2.lyxWriteChanges(font1, os);
1552                         column = 0;
1553                         font1 = font2;
1554                 }
1555
1556                 char_type const c = d->text_[i];
1557                 switch (c) {
1558                 case META_INSET:
1559                         if (Inset const * inset = getInset(i)) {
1560                                 flushString(os, write_buffer);
1561                                 if (inset->directWrite()) {
1562                                         // international char, let it write
1563                                         // code directly so it's shorter in
1564                                         // the file
1565                                         inset->write(os);
1566                                 } else {
1567                                         if (i)
1568                                                 os << '\n';
1569                                         os << "\\begin_inset ";
1570                                         inset->write(os);
1571                                         os << "\n\\end_inset\n\n";
1572                                         column = 0;
1573                                 }
1574                         }
1575                         break;
1576                 case '\\':
1577                         flushString(os, write_buffer);
1578                         os << "\n\\backslash\n";
1579                         column = 0;
1580                         break;
1581                 case '.':
1582                         flushString(os, write_buffer);
1583                         if (i + 1 < size() && d->text_[i + 1] == ' ') {
1584                                 os << ".\n";
1585                                 column = 0;
1586                         } else
1587                                 os << '.';
1588                         break;
1589                 default:
1590                         if ((column > 70 && c == ' ')
1591                             || column > 79) {
1592                                 flushString(os, write_buffer);
1593                                 os << '\n';
1594                                 column = 0;
1595                         }
1596                         // this check is to amend a bug. LyX sometimes
1597                         // inserts '\0' this could cause problems.
1598                         if (c != '\0')
1599                                 write_buffer.push_back(c);
1600                         else
1601                                 LYXERR0("NUL char in structure.");
1602                         ++column;
1603                         break;
1604                 }
1605         }
1606
1607         flushString(os, write_buffer);
1608         os << "\n\\end_layout\n";
1609 }
1610
1611
1612 void Paragraph::validate(LaTeXFeatures & features) const
1613 {
1614         d->validate(features);
1615 }
1616
1617
1618 void Paragraph::insert(pos_type start, docstring const & str,
1619                        Font const & font, Change const & change)
1620 {
1621         for (size_t i = 0, n = str.size(); i != n ; ++i)
1622                 insertChar(start + i, str[i], font, change);
1623 }
1624
1625
1626 void Paragraph::appendChar(char_type c, Font const & font,
1627                 Change const & change)
1628 {
1629         // track change
1630         d->changes_.insert(change, d->text_.size());
1631         // when appending characters, no need to update tables
1632         d->text_.push_back(c);
1633         setFont(d->text_.size() - 1, font);
1634 }
1635
1636
1637 void Paragraph::appendString(docstring const & s, Font const & font,
1638                 Change const & change)
1639 {
1640         pos_type end = s.size();
1641         size_t oldsize = d->text_.size();
1642         size_t newsize = oldsize + end;
1643         size_t capacity = d->text_.capacity();
1644         if (newsize >= capacity)
1645                 d->text_.reserve(max(capacity + 100, newsize));
1646
1647         // when appending characters, no need to update tables
1648         d->text_.append(s);
1649
1650         // FIXME: Optimize this!
1651         for (size_t i = oldsize; i != newsize; ++i) {
1652                 // track change
1653                 d->changes_.insert(change, i);
1654         }
1655         d->fontlist_.set(oldsize, font);
1656         d->fontlist_.set(newsize - 1, font);
1657 }
1658
1659
1660 void Paragraph::insertChar(pos_type pos, char_type c,
1661                            bool trackChanges)
1662 {
1663         d->insertChar(pos, c, Change(trackChanges ?
1664                            Change::INSERTED : Change::UNCHANGED));
1665 }
1666
1667
1668 void Paragraph::insertChar(pos_type pos, char_type c,
1669                            Font const & font, bool trackChanges)
1670 {
1671         d->insertChar(pos, c, Change(trackChanges ?
1672                            Change::INSERTED : Change::UNCHANGED));
1673         setFont(pos, font);
1674 }
1675
1676
1677 void Paragraph::insertChar(pos_type pos, char_type c,
1678                            Font const & font, Change const & change)
1679 {
1680         d->insertChar(pos, c, change);
1681         setFont(pos, font);
1682 }
1683
1684
1685 bool Paragraph::insertInset(pos_type pos, Inset * inset,
1686                             Font const & font, Change const & change)
1687 {
1688         bool const success = insertInset(pos, inset, change);
1689         // Set the font/language of the inset...
1690         setFont(pos, font);
1691         return success;
1692 }
1693
1694
1695 void Paragraph::resetFonts(Font const & font)
1696 {
1697         d->fontlist_.clear();
1698         d->fontlist_.set(0, font);
1699         d->fontlist_.set(d->text_.size() - 1, font);
1700 }
1701
1702 // Gets uninstantiated font setting at position.
1703 Font const & Paragraph::getFontSettings(BufferParams const & bparams,
1704                                          pos_type pos) const
1705 {
1706         if (pos > size()) {
1707                 LYXERR0("pos: " << pos << " size: " << size());
1708                 LASSERT(pos <= size(), /**/);
1709         }
1710
1711         FontList::const_iterator cit = d->fontlist_.fontIterator(pos);
1712         if (cit != d->fontlist_.end())
1713                 return cit->font();
1714
1715         if (pos == size() && !empty())
1716                 return getFontSettings(bparams, pos - 1);
1717
1718         // Optimisation: avoid a full font instantiation if there is no
1719         // language change from previous call.
1720         static Font previous_font;
1721         static Language const * previous_lang = 0;
1722         Language const * lang = getParLanguage(bparams);
1723         if (lang != previous_lang) {
1724                 previous_lang = lang;
1725                 previous_font = Font(inherit_font, lang);
1726         }
1727         return previous_font;
1728 }
1729
1730
1731 FontSpan Paragraph::fontSpan(pos_type pos) const
1732 {
1733         LASSERT(pos <= size(), /**/);
1734         pos_type start = 0;
1735
1736         FontList::const_iterator cit = d->fontlist_.begin();
1737         FontList::const_iterator end = d->fontlist_.end();
1738         for (; cit != end; ++cit) {
1739                 if (cit->pos() >= pos) {
1740                         if (pos >= beginOfBody())
1741                                 return FontSpan(max(start, beginOfBody()),
1742                                                 cit->pos());
1743                         else
1744                                 return FontSpan(start,
1745                                                 min(beginOfBody() - 1,
1746                                                          cit->pos()));
1747                 }
1748                 start = cit->pos() + 1;
1749         }
1750
1751         // This should not happen, but if so, we take no chances.
1752         // LYXERR0("Paragraph::getEndPosOfFontSpan: This should not happen!");
1753         return FontSpan(pos, pos);
1754 }
1755
1756
1757 // Gets uninstantiated font setting at position 0
1758 Font const & Paragraph::getFirstFontSettings(BufferParams const & bparams) const
1759 {
1760         if (!empty() && !d->fontlist_.empty())
1761                 return d->fontlist_.begin()->font();
1762
1763         // Optimisation: avoid a full font instantiation if there is no
1764         // language change from previous call.
1765         static Font previous_font;
1766         static Language const * previous_lang = 0;
1767         if (bparams.language != previous_lang) {
1768                 previous_lang = bparams.language;
1769                 previous_font = Font(inherit_font, bparams.language);
1770         }
1771
1772         return previous_font;
1773 }
1774
1775
1776 // Gets the fully instantiated font at a given position in a paragraph
1777 // This is basically the same function as Text::GetFont() in text2.cpp.
1778 // The difference is that this one is used for generating the LaTeX file,
1779 // and thus cosmetic "improvements" are disallowed: This has to deliver
1780 // the true picture of the buffer. (Asger)
1781 Font const Paragraph::getFont(BufferParams const & bparams, pos_type pos,
1782                                  Font const & outerfont) const
1783 {
1784         LASSERT(pos >= 0, /**/);
1785
1786         Font font = getFontSettings(bparams, pos);
1787
1788         pos_type const body_pos = beginOfBody();
1789         FontInfo & fi = font.fontInfo();
1790         if (pos < body_pos)
1791                 fi.realize(d->layout_->labelfont);
1792         else
1793                 fi.realize(d->layout_->font);
1794
1795         fi.realize(outerfont.fontInfo());
1796         fi.realize(bparams.getFont().fontInfo());
1797
1798         return font;
1799 }
1800
1801
1802 Font const Paragraph::getLabelFont
1803         (BufferParams const & bparams, Font const & outerfont) const
1804 {
1805         FontInfo tmpfont = d->layout_->labelfont;
1806         tmpfont.realize(outerfont.fontInfo());
1807         tmpfont.realize(bparams.getFont().fontInfo());
1808         return Font(tmpfont, getParLanguage(bparams));
1809 }
1810
1811
1812 Font const Paragraph::getLayoutFont
1813         (BufferParams const & bparams, Font const & outerfont) const
1814 {
1815         FontInfo tmpfont = d->layout_->font;
1816         tmpfont.realize(outerfont.fontInfo());
1817         tmpfont.realize(bparams.getFont().fontInfo());
1818         return Font(tmpfont, getParLanguage(bparams));
1819 }
1820
1821
1822 /// Returns the height of the highest font in range
1823 FontSize Paragraph::highestFontInRange
1824         (pos_type startpos, pos_type endpos, FontSize def_size) const
1825 {
1826         return d->fontlist_.highestInRange(startpos, endpos, def_size);
1827 }
1828
1829
1830 char_type Paragraph::getUChar(BufferParams const & bparams, pos_type pos) const
1831 {
1832         char_type c = d->text_[pos];
1833         if (!lyxrc.rtl_support)
1834                 return c;
1835
1836         char_type uc = c;
1837         switch (c) {
1838         case '(':
1839                 uc = ')';
1840                 break;
1841         case ')':
1842                 uc = '(';
1843                 break;
1844         case '[':
1845                 uc = ']';
1846                 break;
1847         case ']':
1848                 uc = '[';
1849                 break;
1850         case '{':
1851                 uc = '}';
1852                 break;
1853         case '}':
1854                 uc = '{';
1855                 break;
1856         case '<':
1857                 uc = '>';
1858                 break;
1859         case '>':
1860                 uc = '<';
1861                 break;
1862         }
1863         if (uc != c && getFontSettings(bparams, pos).isRightToLeft())
1864                 return uc;
1865         return c;
1866 }
1867
1868
1869 void Paragraph::setFont(pos_type pos, Font const & font)
1870 {
1871         LASSERT(pos <= size(), /**/);
1872
1873         // First, reduce font against layout/label font
1874         // Update: The setCharFont() routine in text2.cpp already
1875         // reduces font, so we don't need to do that here. (Asger)
1876
1877         d->fontlist_.set(pos, font);
1878 }
1879
1880
1881 void Paragraph::makeSameLayout(Paragraph const & par)
1882 {
1883         d->layout_ = par.d->layout_;
1884         d->params_ = par.d->params_;
1885 }
1886
1887
1888 bool Paragraph::stripLeadingSpaces(bool trackChanges)
1889 {
1890         if (isFreeSpacing())
1891                 return false;
1892
1893         int pos = 0;
1894         int count = 0;
1895
1896         while (pos < size() && (isNewline(pos) || isLineSeparator(pos))) {
1897                 if (eraseChar(pos, trackChanges))
1898                         ++count;
1899                 else
1900                         ++pos;
1901         }
1902
1903         return count > 0 || pos > 0;
1904 }
1905
1906
1907 bool Paragraph::hasSameLayout(Paragraph const & par) const
1908 {
1909         return par.d->layout_ == d->layout_
1910                 && d->params_.sameLayout(par.d->params_);
1911 }
1912
1913
1914 depth_type Paragraph::getDepth() const
1915 {
1916         return d->params_.depth();
1917 }
1918
1919
1920 depth_type Paragraph::getMaxDepthAfter() const
1921 {
1922         if (d->layout_->isEnvironment())
1923                 return d->params_.depth() + 1;
1924         else
1925                 return d->params_.depth();
1926 }
1927
1928
1929 char Paragraph::getAlign() const
1930 {
1931         if (d->params_.align() == LYX_ALIGN_LAYOUT)
1932                 return d->layout_->align;
1933         else
1934                 return d->params_.align();
1935 }
1936
1937
1938 docstring const & Paragraph::labelString() const
1939 {
1940         return d->params_.labelString();
1941 }
1942
1943
1944 // the next two functions are for the manual labels
1945 docstring const Paragraph::getLabelWidthString() const
1946 {
1947         if (d->layout_->margintype == MARGIN_MANUAL
1948             || d->layout_->latextype == LATEX_BIB_ENVIRONMENT)
1949                 return d->params_.labelWidthString();
1950         else
1951                 return _("Senseless with this layout!");
1952 }
1953
1954
1955 void Paragraph::setLabelWidthString(docstring const & s)
1956 {
1957         d->params_.labelWidthString(s);
1958 }
1959
1960
1961 docstring Paragraph::expandLabel(Layout const & layout,
1962                 BufferParams const & bparams) const
1963 {
1964         return expandParagraphLabel(layout, bparams, true);
1965 }
1966
1967
1968 docstring Paragraph::expandDocBookLabel(Layout const & layout,
1969                 BufferParams const & bparams) const
1970 {
1971         return expandParagraphLabel(layout, bparams, false);
1972 }
1973
1974
1975 docstring Paragraph::expandParagraphLabel(Layout const & layout,
1976                 BufferParams const & bparams, bool process_appendix) const
1977 {
1978         DocumentClass const & tclass = bparams.documentClass();
1979         string const & lang = getParLanguage(bparams)->code();
1980         bool const in_appendix = process_appendix && d->params_.appendix();
1981         docstring fmt = translateIfPossible(layout.labelstring(in_appendix), lang);
1982
1983         if (fmt.empty() && layout.labeltype == LABEL_COUNTER
1984             && !layout.counter.empty())
1985                 return tclass.counters().theCounter(layout.counter, lang);
1986
1987         // handle 'inherited level parts' in 'fmt',
1988         // i.e. the stuff between '@' in   '@Section@.\arabic{subsection}'
1989         size_t const i = fmt.find('@', 0);
1990         if (i != docstring::npos) {
1991                 size_t const j = fmt.find('@', i + 1);
1992                 if (j != docstring::npos) {
1993                         docstring parent(fmt, i + 1, j - i - 1);
1994                         docstring label = from_ascii("??");
1995                         if (tclass.hasLayout(parent))
1996                                 docstring label = expandParagraphLabel(tclass[parent], bparams,
1997                                                       process_appendix);
1998                         fmt = docstring(fmt, 0, i) + label
1999                                 + docstring(fmt, j + 1, docstring::npos);
2000                 }
2001         }
2002
2003         return tclass.counters().counterLabel(fmt, lang);
2004 }
2005
2006
2007 void Paragraph::applyLayout(Layout const & new_layout)
2008 {
2009         d->layout_ = &new_layout;
2010         LyXAlignment const oldAlign = d->params_.align();
2011
2012         if (!(oldAlign & d->layout_->alignpossible)) {
2013                 frontend::Alert::warning(_("Alignment not permitted"),
2014                         _("The new layout does not permit the alignment previously used.\nSetting to default."));
2015                 d->params_.align(LYX_ALIGN_LAYOUT);
2016         }
2017 }
2018
2019
2020 pos_type Paragraph::beginOfBody() const
2021 {
2022         return d->begin_of_body_;
2023 }
2024
2025
2026 void Paragraph::setBeginOfBody()
2027 {
2028         if (d->layout_->labeltype != LABEL_MANUAL) {
2029                 d->begin_of_body_ = 0;
2030                 return;
2031         }
2032
2033         // Unroll the first two cycles of the loop
2034         // and remember the previous character to
2035         // remove unnecessary getChar() calls
2036         pos_type i = 0;
2037         pos_type end = size();
2038         if (i < end && !isNewline(i)) {
2039                 ++i;
2040                 char_type previous_char = 0;
2041                 char_type temp = 0;
2042                 if (i < end) {
2043                         previous_char = d->text_[i];
2044                         if (!isNewline(i)) {
2045                                 ++i;
2046                                 while (i < end && previous_char != ' ') {
2047                                         temp = d->text_[i];
2048                                         if (isNewline(i))
2049                                                 break;
2050                                         ++i;
2051                                         previous_char = temp;
2052                                 }
2053                         }
2054                 }
2055         }
2056
2057         d->begin_of_body_ = i;
2058 }
2059
2060
2061 bool Paragraph::allowParagraphCustomization() const
2062 {
2063         return inInset().allowParagraphCustomization();
2064 }
2065
2066
2067 bool Paragraph::usePlainLayout() const
2068 {
2069         return inInset().usePlainLayout();
2070 }
2071
2072
2073 namespace {
2074
2075 // paragraphs inside floats need different alignment tags to avoid
2076 // unwanted space
2077
2078 bool noTrivlistCentering(InsetCode code)
2079 {
2080         return code == FLOAT_CODE
2081                || code == WRAP_CODE
2082                || code == CELL_CODE;
2083 }
2084
2085
2086 string correction(string const & orig)
2087 {
2088         if (orig == "flushleft")
2089                 return "raggedright";
2090         if (orig == "flushright")
2091                 return "raggedleft";
2092         if (orig == "center")
2093                 return "centering";
2094         return orig;
2095 }
2096
2097
2098 string const corrected_env(string const & suffix, string const & env,
2099         InsetCode code, bool const lastpar)
2100 {
2101         string output = suffix + "{";
2102         if (noTrivlistCentering(code)) {
2103                 if (lastpar) {
2104                         // the last paragraph in non-trivlist-aligned
2105                         // context is special (to avoid unwanted whitespace)
2106                         if (suffix == "\\begin")
2107                                 return "\\" + correction(env) + "{}";
2108                         return string();
2109                 }
2110                 output += correction(env);
2111         } else
2112                 output += env;
2113         output += "}";
2114         if (suffix == "\\begin")
2115                 output += "\n";
2116         return output;
2117 }
2118
2119
2120 void adjust_row_column(string const & str, TexRow & texrow, int & column)
2121 {
2122         if (!contains(str, "\n"))
2123                 column += str.size();
2124         else {
2125                 string tmp;
2126                 texrow.newline();
2127                 column = rsplit(str, tmp, '\n').size();
2128         }
2129 }
2130
2131 } // namespace anon
2132
2133
2134 int Paragraph::Private::startTeXParParams(BufferParams const & bparams,
2135                                  odocstream & os, TexRow & texrow,
2136                                  OutputParams const & runparams) const
2137 {
2138         int column = 0;
2139
2140         if (params_.noindent()) {
2141                 os << "\\noindent ";
2142                 column += 10;
2143         }
2144
2145         LyXAlignment const curAlign = params_.align();
2146
2147         if (curAlign == layout_->align)
2148                 return column;
2149
2150         switch (curAlign) {
2151         case LYX_ALIGN_NONE:
2152         case LYX_ALIGN_BLOCK:
2153         case LYX_ALIGN_LAYOUT:
2154         case LYX_ALIGN_SPECIAL:
2155         case LYX_ALIGN_DECIMAL:
2156                 break;
2157         case LYX_ALIGN_LEFT:
2158         case LYX_ALIGN_RIGHT:
2159         case LYX_ALIGN_CENTER:
2160                 if (runparams.moving_arg) {
2161                         os << "\\protect";
2162                         column += 8;
2163                 }
2164                 break;
2165         }
2166
2167         string const begin_tag = "\\begin";
2168         InsetCode code = ownerCode();
2169         bool const lastpar = runparams.isLastPar;
2170
2171         switch (curAlign) {
2172         case LYX_ALIGN_NONE:
2173         case LYX_ALIGN_BLOCK:
2174         case LYX_ALIGN_LAYOUT:
2175         case LYX_ALIGN_SPECIAL:
2176         case LYX_ALIGN_DECIMAL:
2177                 break;
2178         case LYX_ALIGN_LEFT: {
2179                 string output;
2180                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2181                         output = corrected_env(begin_tag, "flushleft", code, lastpar);
2182                 else
2183                         output = corrected_env(begin_tag, "flushright", code, lastpar);
2184                 os << from_ascii(output);
2185                 adjust_row_column(output, texrow, column);
2186                 break;
2187         } case LYX_ALIGN_RIGHT: {
2188                 string output;
2189                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2190                         output = corrected_env(begin_tag, "flushright", code, lastpar);
2191                 else
2192                         output = corrected_env(begin_tag, "flushleft", code, lastpar);
2193                 os << from_ascii(output);
2194                 adjust_row_column(output, texrow, column);
2195                 break;
2196         } case LYX_ALIGN_CENTER: {
2197                 string output;
2198                 output = corrected_env(begin_tag, "center", code, lastpar);
2199                 os << from_ascii(output);
2200                 adjust_row_column(output, texrow, column);
2201                 break;
2202         }
2203         }
2204
2205         return column;
2206 }
2207
2208
2209 int Paragraph::Private::endTeXParParams(BufferParams const & bparams,
2210                                odocstream & os, TexRow & texrow,
2211                                OutputParams const & runparams) const
2212 {
2213         int column = 0;
2214
2215         LyXAlignment const curAlign = params_.align();
2216
2217         if (curAlign == layout_->align)
2218                 return column;
2219
2220         switch (curAlign) {
2221         case LYX_ALIGN_NONE:
2222         case LYX_ALIGN_BLOCK:
2223         case LYX_ALIGN_LAYOUT:
2224         case LYX_ALIGN_SPECIAL:
2225         case LYX_ALIGN_DECIMAL:
2226                 break;
2227         case LYX_ALIGN_LEFT:
2228         case LYX_ALIGN_RIGHT:
2229         case LYX_ALIGN_CENTER:
2230                 if (runparams.moving_arg) {
2231                         os << "\\protect";
2232                         column = 8;
2233                 }
2234                 break;
2235         }
2236
2237         string const end_tag = "\n\\par\\end";
2238         InsetCode code = ownerCode();
2239         bool const lastpar = runparams.isLastPar;
2240
2241         switch (curAlign) {
2242         case LYX_ALIGN_NONE:
2243         case LYX_ALIGN_BLOCK:
2244         case LYX_ALIGN_LAYOUT:
2245         case LYX_ALIGN_SPECIAL:
2246         case LYX_ALIGN_DECIMAL:
2247                 break;
2248         case LYX_ALIGN_LEFT: {
2249                 string output;
2250                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2251                         output = corrected_env(end_tag, "flushleft", code, lastpar);
2252                 else
2253                         output = corrected_env(end_tag, "flushright", code, lastpar);
2254                 os << from_ascii(output);
2255                 adjust_row_column(output, texrow, column);
2256                 break;
2257         } case LYX_ALIGN_RIGHT: {
2258                 string output;
2259                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2260                         output = corrected_env(end_tag, "flushright", code, lastpar);
2261                 else
2262                         output = corrected_env(end_tag, "flushleft", code, lastpar);
2263                 os << from_ascii(output);
2264                 adjust_row_column(output, texrow, column);
2265                 break;
2266         } case LYX_ALIGN_CENTER: {
2267                 string output;
2268                 output = corrected_env(end_tag, "center", code, lastpar);
2269                 os << from_ascii(output);
2270                 adjust_row_column(output, texrow, column);
2271                 break;
2272         }
2273         }
2274
2275         return column;
2276 }
2277
2278
2279 // This one spits out the text of the paragraph
2280 void Paragraph::latex(BufferParams const & bparams,
2281         Font const & outerfont,
2282         odocstream & os, TexRow & texrow,
2283         OutputParams const & runparams,
2284         int start_pos, int end_pos, bool force) const
2285 {
2286         LYXERR(Debug::LATEX, "Paragraph::latex...     " << this);
2287
2288         // FIXME This check should not be needed. Perhaps issue an
2289         // error if it triggers.
2290         Layout const & style = inInset().forcePlainLayout() ?
2291                 bparams.documentClass().plainLayout() : *d->layout_;
2292
2293         if (!force && style.inpreamble)
2294                 return;
2295
2296         bool const allowcust = allowParagraphCustomization();
2297
2298         // Current base font for all inherited font changes, without any
2299         // change caused by an individual character, except for the language:
2300         // It is set to the language of the first character.
2301         // As long as we are in the label, this font is the base font of the
2302         // label. Before the first body character it is set to the base font
2303         // of the body.
2304         Font basefont;
2305
2306         // Maybe we have to create a optional argument.
2307         pos_type body_pos = beginOfBody();
2308         unsigned int column = 0;
2309
2310         if (body_pos > 0) {
2311                 // the optional argument is kept in curly brackets in
2312                 // case it contains a ']'
2313                 os << "[{";
2314                 column += 2;
2315                 basefont = getLabelFont(bparams, outerfont);
2316         } else {
2317                 basefont = getLayoutFont(bparams, outerfont);
2318         }
2319
2320         // Which font is currently active?
2321         Font running_font(basefont);
2322         // Do we have an open font change?
2323         bool open_font = false;
2324
2325         Change runningChange = Change(Change::UNCHANGED);
2326
2327         Encoding const * const prev_encoding = runparams.encoding;
2328
2329         texrow.start(id(), 0);
2330
2331         // if the paragraph is empty, the loop will not be entered at all
2332         if (empty()) {
2333                 if (style.isCommand()) {
2334                         os << '{';
2335                         ++column;
2336                 }
2337                 if (allowcust)
2338                         column += d->startTeXParParams(bparams, os, texrow,
2339                                                     runparams);
2340         }
2341
2342         for (pos_type i = 0; i < size(); ++i) {
2343                 // First char in paragraph or after label?
2344                 if (i == body_pos) {
2345                         if (body_pos > 0) {
2346                                 if (open_font) {
2347                                         column += running_font.latexWriteEndChanges(
2348                                                 os, bparams, runparams,
2349                                                 basefont, basefont);
2350                                         open_font = false;
2351                                 }
2352                                 basefont = getLayoutFont(bparams, outerfont);
2353                                 running_font = basefont;
2354
2355                                 column += Changes::latexMarkChange(os, bparams,
2356                                                 runningChange, Change(Change::UNCHANGED),
2357                                                 runparams);
2358                                 runningChange = Change(Change::UNCHANGED);
2359
2360                                 os << "}] ";
2361                                 column +=3;
2362                         }
2363                         if (style.isCommand()) {
2364                                 os << '{';
2365                                 ++column;
2366                         }
2367
2368                         if (allowcust)
2369                                 column += d->startTeXParParams(bparams, os,
2370                                                             texrow,
2371                                                             runparams);
2372                 }
2373
2374                 Change const & change = runparams.inDeletedInset ? runparams.changeOfDeletedInset
2375                                                                  : lookupChange(i);
2376
2377                 if (bparams.outputChanges && runningChange != change) {
2378                         if (open_font) {
2379                                 column += running_font.latexWriteEndChanges(
2380                                                 os, bparams, runparams, basefont, basefont);
2381                                 open_font = false;
2382                         }
2383                         basefont = getLayoutFont(bparams, outerfont);
2384                         running_font = basefont;
2385
2386                         column += Changes::latexMarkChange(os, bparams, runningChange,
2387                                                            change, runparams);
2388                         runningChange = change;
2389                 }
2390
2391                 // do not output text which is marked deleted
2392                 // if change tracking output is disabled
2393                 if (!bparams.outputChanges && change.deleted()) {
2394                         continue;
2395                 }
2396
2397                 ++column;
2398
2399                 // Fully instantiated font
2400                 Font const font = getFont(bparams, i, outerfont);
2401
2402                 Font const last_font = running_font;
2403
2404                 // Do we need to close the previous font?
2405                 if (open_font &&
2406                     (font != running_font ||
2407                      font.language() != running_font.language()))
2408                 {
2409                         column += running_font.latexWriteEndChanges(
2410                                         os, bparams, runparams, basefont,
2411                                         (i == body_pos-1) ? basefont : font);
2412                         running_font = basefont;
2413                         open_font = false;
2414                 }
2415
2416                 string const running_lang = runparams.use_polyglossia ?
2417                         running_font.language()->polyglossia() : running_font.language()->babel();
2418                 // close babel's font environment before opening CJK.
2419                 string const lang_end_command = runparams.use_polyglossia ?
2420                         "\\end{$$lang}" : lyxrc.language_command_end;
2421                 if (!running_lang.empty() &&
2422                     font.language()->encoding()->package() == Encoding::CJK) {
2423                                 string end_tag = subst(lang_end_command,
2424                                                         "$$lang",
2425                                                         running_lang);
2426                                 os << from_ascii(end_tag);
2427                                 column += end_tag.length();
2428                 }
2429
2430                 // Switch file encoding if necessary (and allowed)
2431                 if (!runparams.pass_thru && !style.pass_thru &&
2432                     runparams.encoding->package() != Encoding::none &&
2433                     font.language()->encoding()->package() != Encoding::none) {
2434                         pair<bool, int> const enc_switch = switchEncoding(os, bparams,
2435                                         runparams, *(font.language()->encoding()));
2436                         if (enc_switch.first) {
2437                                 column += enc_switch.second;
2438                                 runparams.encoding = font.language()->encoding();
2439                         }
2440                 }
2441
2442                 char_type const c = d->text_[i];
2443
2444                 // Do we need to change font?
2445                 if ((font != running_font ||
2446                      font.language() != running_font.language()) &&
2447                         i != body_pos - 1)
2448                 {
2449                         odocstringstream ods;
2450                         column += font.latexWriteStartChanges(ods, bparams,
2451                                                               runparams, basefont,
2452                                                               last_font);
2453                         running_font = font;
2454                         open_font = true;
2455                         docstring fontchange = ods.str();
2456                         // check whether the fontchange ends with a \\textcolor
2457                         // modifier and the text starts with a space (bug 4473)
2458                         docstring const last_modifier = rsplit(fontchange, '\\');
2459                         if (prefixIs(last_modifier, from_ascii("textcolor")) && c == ' ')
2460                                 os << fontchange << from_ascii("{}");
2461                         // check if the fontchange ends with a trailing blank
2462                         // (like "\small " (see bug 3382)
2463                         else if (suffixIs(fontchange, ' ') && c == ' ')
2464                                 os << fontchange.substr(0, fontchange.size() - 1)
2465                                    << from_ascii("{}");
2466                         else
2467                                 os << fontchange;
2468                 }
2469
2470                 // FIXME: think about end_pos implementation...
2471                 if (c == ' ' && i >= start_pos && (end_pos == -1 || i < end_pos)) {
2472                         // FIXME: integrate this case in latexSpecialChar
2473                         // Do not print the separation of the optional argument
2474                         // if style.pass_thru is false. This works because
2475                         // latexSpecialChar ignores spaces if
2476                         // style.pass_thru is false.
2477                         if (i != body_pos - 1) {
2478                                 if (d->simpleTeXBlanks(
2479                                                 runparams, os, texrow,
2480                                                 i, column, font, style)) {
2481                                         // A surrogate pair was output. We
2482                                         // must not call latexSpecialChar
2483                                         // in this iteration, since it would output
2484                                         // the combining character again.
2485                                         ++i;
2486                                         continue;
2487                                 }
2488                         }
2489                 }
2490
2491                 OutputParams rp = runparams;
2492                 rp.free_spacing = style.free_spacing;
2493                 rp.local_font = &font;
2494                 rp.intitle = style.intitle;
2495
2496                 // Two major modes:  LaTeX or plain
2497                 // Handle here those cases common to both modes
2498                 // and then split to handle the two modes separately.
2499                 if (c == META_INSET) {
2500                         if (i >= start_pos && (end_pos == -1 || i < end_pos)) {
2501                                 d->latexInset(bparams, os,
2502                                                 texrow, rp, running_font,
2503                                                 basefont, outerfont, open_font,
2504                                                 runningChange, style, i, column);
2505                         }
2506                 } else {
2507                         if (i >= start_pos && (end_pos == -1 || i < end_pos)) {
2508                                 try {
2509                                         d->latexSpecialChar(os, rp, running_font, runningChange,
2510                                                 style, i, column);
2511                                 } catch (EncodingException & e) {
2512                                 if (runparams.dryrun) {
2513                                         os << "<" << _("LyX Warning: ")
2514                                            << _("uncodable character") << " '";
2515                                         os.put(c);
2516                                         os << "'>";
2517                                 } else {
2518                                         // add location information and throw again.
2519                                         e.par_id = id();
2520                                         e.pos = i;
2521                                         throw(e);
2522                                 }
2523                         }
2524                 }
2525                 }
2526
2527                 // Set the encoding to that returned from latexSpecialChar (see
2528                 // comment for encoding member in OutputParams.h)
2529                 runparams.encoding = rp.encoding;
2530         }
2531
2532         // If we have an open font definition, we have to close it
2533         if (open_font) {
2534 #ifdef FIXED_LANGUAGE_END_DETECTION
2535                 if (next_) {
2536                         running_font.latexWriteEndChanges(os, bparams,
2537                                         runparams, basefont,
2538                                         next_->getFont(bparams, 0, outerfont));
2539                 } else {
2540                         running_font.latexWriteEndChanges(os, bparams,
2541                                         runparams, basefont, basefont);
2542                 }
2543 #else
2544 //FIXME: For now we ALWAYS have to close the foreign font settings if they are
2545 //FIXME: there as we start another \selectlanguage with the next paragraph if
2546 //FIXME: we are in need of this. This should be fixed sometime (Jug)
2547                 running_font.latexWriteEndChanges(os, bparams, runparams,
2548                                 basefont, basefont);
2549 #endif
2550         }
2551
2552         column += Changes::latexMarkChange(os, bparams, runningChange,
2553                                            Change(Change::UNCHANGED), runparams);
2554
2555         // Needed if there is an optional argument but no contents.
2556         if (body_pos > 0 && body_pos == size()) {
2557                 os << "}]~";
2558         }
2559
2560         if (allowcust && d->endTeXParParams(bparams, os, texrow, runparams)
2561             && runparams.encoding != prev_encoding) {
2562                 runparams.encoding = prev_encoding;
2563                 if (!runparams.isFullUnicode())
2564                         os << setEncoding(prev_encoding->iconvName());
2565         }
2566
2567         LYXERR(Debug::LATEX, "Paragraph::latex... done " << this);
2568 }
2569
2570
2571 bool Paragraph::emptyTag() const
2572 {
2573         for (pos_type i = 0; i < size(); ++i) {
2574                 if (Inset const * inset = getInset(i)) {
2575                         InsetCode lyx_code = inset->lyxCode();
2576                         // FIXME testing like that is wrong. What is
2577                         // the intent?
2578                         if (lyx_code != TOC_CODE &&
2579                             lyx_code != INCLUDE_CODE &&
2580                             lyx_code != GRAPHICS_CODE &&
2581                             lyx_code != ERT_CODE &&
2582                             lyx_code != LISTINGS_CODE &&
2583                             lyx_code != FLOAT_CODE &&
2584                             lyx_code != TABULAR_CODE) {
2585                                 return false;
2586                         }
2587                 } else {
2588                         char_type c = d->text_[i];
2589                         if (c != ' ' && c != '\t')
2590                                 return false;
2591                 }
2592         }
2593         return true;
2594 }
2595
2596
2597 string Paragraph::getID(Buffer const & buf, OutputParams const & runparams)
2598         const
2599 {
2600         for (pos_type i = 0; i < size(); ++i) {
2601                 if (Inset const * inset = getInset(i)) {
2602                         InsetCode lyx_code = inset->lyxCode();
2603                         if (lyx_code == LABEL_CODE) {
2604                                 InsetLabel const * const il = static_cast<InsetLabel const *>(inset);
2605                                 docstring const & id = il->getParam("name");
2606                                 return "id='" + to_utf8(sgml::cleanID(buf, runparams, id)) + "'";
2607                         }
2608                 }
2609         }
2610         return string();
2611 }
2612
2613
2614 pos_type Paragraph::firstWordDocBook(odocstream & os, OutputParams const & runparams)
2615         const
2616 {
2617         pos_type i;
2618         for (i = 0; i < size(); ++i) {
2619                 if (Inset const * inset = getInset(i)) {
2620                         inset->docbook(os, runparams);
2621                 } else {
2622                         char_type c = d->text_[i];
2623                         if (c == ' ')
2624                                 break;
2625                         os << sgml::escapeChar(c);
2626                 }
2627         }
2628         return i;
2629 }
2630
2631
2632 pos_type Paragraph::firstWordLyXHTML(XHTMLStream & xs, OutputParams const & runparams)
2633         const
2634 {
2635         pos_type i;
2636         for (i = 0; i < size(); ++i) {
2637                 if (Inset const * inset = getInset(i)) {
2638                         inset->xhtml(xs, runparams);
2639                 } else {
2640                         char_type c = d->text_[i];
2641                         if (c == ' ')
2642                                 break;
2643                         xs << c;
2644                 }
2645         }
2646         return i;
2647 }
2648
2649
2650 bool Paragraph::Private::onlyText(Buffer const & buf, Font const & outerfont, pos_type initial) const
2651 {
2652         Font font_old;
2653         pos_type size = text_.size();
2654         for (pos_type i = initial; i < size; ++i) {
2655                 Font font = owner_->getFont(buf.params(), i, outerfont);
2656                 if (text_[i] == META_INSET)
2657                         return false;
2658                 if (i != initial && font != font_old)
2659                         return false;
2660                 font_old = font;
2661         }
2662
2663         return true;
2664 }
2665
2666
2667 void Paragraph::simpleDocBookOnePar(Buffer const & buf,
2668                                     odocstream & os,
2669                                     OutputParams const & runparams,
2670                                     Font const & outerfont,
2671                                     pos_type initial) const
2672 {
2673         bool emph_flag = false;
2674
2675         Layout const & style = *d->layout_;
2676         FontInfo font_old =
2677                 style.labeltype == LABEL_MANUAL ? style.labelfont : style.font;
2678
2679         if (style.pass_thru && !d->onlyText(buf, outerfont, initial))
2680                 os << "]]>";
2681
2682         // parsing main loop
2683         for (pos_type i = initial; i < size(); ++i) {
2684                 Font font = getFont(buf.params(), i, outerfont);
2685
2686                 // handle <emphasis> tag
2687                 if (font_old.emph() != font.fontInfo().emph()) {
2688                         if (font.fontInfo().emph() == FONT_ON) {
2689                                 os << "<emphasis>";
2690                                 emph_flag = true;
2691                         } else if (i != initial) {
2692                                 os << "</emphasis>";
2693                                 emph_flag = false;
2694                         }
2695                 }
2696
2697                 if (Inset const * inset = getInset(i)) {
2698                         inset->docbook(os, runparams);
2699                 } else {
2700                         char_type c = d->text_[i];
2701
2702                         if (style.pass_thru)
2703                                 os.put(c);
2704                         else
2705                                 os << sgml::escapeChar(c);
2706                 }
2707                 font_old = font.fontInfo();
2708         }
2709
2710         if (emph_flag) {
2711                 os << "</emphasis>";
2712         }
2713
2714         if (style.free_spacing)
2715                 os << '\n';
2716         if (style.pass_thru && !d->onlyText(buf, outerfont, initial))
2717                 os << "<![CDATA[";
2718 }
2719
2720
2721 docstring Paragraph::simpleLyXHTMLOnePar(Buffer const & buf,
2722                                     XHTMLStream & xs,
2723                                     OutputParams const & runparams,
2724                                     Font const & outerfont,
2725                                     pos_type initial) const
2726 {
2727         docstring retval;
2728
2729         bool emph_flag = false;
2730         bool bold_flag = false;
2731         string closing_tag;
2732
2733         Layout const & style = *d->layout_;
2734
2735         if (!runparams.for_toc && runparams.html_make_pars) {
2736                 // generate a magic label for this paragraph
2737                 string const attr = "id='" + magicLabel() + "'";
2738                 xs << html::CompTag("a", attr);
2739         }
2740
2741         FontInfo font_old =
2742                 style.labeltype == LABEL_MANUAL ? style.labelfont : style.font;
2743
2744         // parsing main loop
2745         for (pos_type i = initial; i < size(); ++i) {
2746                 // let's not show deleted material in the output
2747                 if (isDeleted(i))
2748                         continue;
2749
2750                 Font font = getFont(buf.params(), i, outerfont);
2751
2752                 // emphasis
2753                 if (font_old.emph() != font.fontInfo().emph()) {
2754                         if (font.fontInfo().emph() == FONT_ON) {
2755                                 xs << html::StartTag("em");
2756                                 emph_flag = true;
2757                         } else if (emph_flag && i != initial) {
2758                                 xs << html::EndTag("em");
2759                                 emph_flag = false;
2760                         }
2761                 }
2762                 // bold
2763                 if (font_old.series() != font.fontInfo().series()) {
2764                         if (font.fontInfo().series() == BOLD_SERIES) {
2765                                 xs << html::StartTag("strong");
2766                                 bold_flag = true;
2767                         } else if (bold_flag && i != initial) {
2768                                 xs << html::EndTag("strong");
2769                                 bold_flag = false;
2770                         }
2771                 }
2772                 // FIXME XHTML
2773                 // Other such tags? What about the other text ranges?
2774
2775                 Inset const * inset = getInset(i);
2776                 if (inset) {
2777                         if (!runparams.for_toc || inset->isInToc()) {
2778                                 OutputParams np = runparams;
2779                                 if (!inset->getLayout().htmlisblock())
2780                                         np.html_in_par = true;
2781                                 retval += inset->xhtml(xs, np);
2782                         }
2783                 } else {
2784                         char_type c = d->text_[i];
2785
2786                         if (style.pass_thru)
2787                                 xs << c;
2788                         else if (c == '-') {
2789                                 docstring str;
2790                                 int j = i + 1;
2791                                 if (j < size() && d->text_[j] == '-') {
2792                                         j += 1;
2793                                         if (j < size() && d->text_[j] == '-') {
2794                                                 str += from_ascii("&mdash;");
2795                                                 i += 2;
2796                                         } else {
2797                                                 str += from_ascii("&ndash;");
2798                                                 i += 1;
2799                                         }
2800                                 }
2801                                 else
2802                                         str += c;
2803                                 // We don't want to escape the entities. Note that
2804                                 // it is safe to do this, since str can otherwise
2805                                 // only be "-". E.g., it can't be "<".
2806                                 xs << XHTMLStream::ESCAPE_NONE << str;
2807                         } else
2808                                 xs << c;
2809                 }
2810                 font_old = font.fontInfo();
2811         }
2812
2813         xs.closeFontTags();
2814         return retval;
2815 }
2816
2817
2818 bool Paragraph::isHfill(pos_type pos) const
2819 {
2820         Inset const * inset = getInset(pos);
2821         return inset && (inset->lyxCode() == SPACE_CODE &&
2822                          inset->isStretchableSpace());
2823 }
2824
2825
2826 bool Paragraph::isNewline(pos_type pos) const
2827 {
2828         Inset const * inset = getInset(pos);
2829         return inset && inset->lyxCode() == NEWLINE_CODE;
2830 }
2831
2832
2833 bool Paragraph::isLineSeparator(pos_type pos) const
2834 {
2835         char_type const c = d->text_[pos];
2836         if (isLineSeparatorChar(c))
2837                 return true;
2838         Inset const * inset = getInset(pos);
2839         return inset && inset->isLineSeparator();
2840 }
2841
2842
2843 bool Paragraph::isWordSeparator(pos_type pos) const
2844 {
2845         if (Inset const * inset = getInset(pos))
2846                 return !inset->isLetter();
2847         char_type const c = d->text_[pos];
2848         // We want to pass the ' and escape chars to the spellchecker
2849         static docstring const quote = from_utf8(lyxrc.spellchecker_esc_chars + '\'');
2850         return (!isLetterChar(c) && !isDigitASCII(c) && !contains(quote, c))
2851                 || pos == size();
2852 }
2853
2854
2855 bool Paragraph::isSameSpellRange(pos_type pos1, pos_type pos2) const
2856 {
2857         return pos1 == pos2
2858                 || d->speller_state_.getRange(pos1) == d->speller_state_.getRange(pos2);
2859 }
2860
2861
2862 bool Paragraph::isChar(pos_type pos) const
2863 {
2864         if (Inset const * inset = getInset(pos))
2865                 return inset->isChar();
2866         char_type const c = d->text_[pos];
2867         return !isLetterChar(c) && !isDigitASCII(c) && !lyx::isSpace(c);
2868 }
2869
2870
2871 bool Paragraph::isSpace(pos_type pos) const
2872 {
2873         if (Inset const * inset = getInset(pos))
2874                 return inset->isSpace();
2875         char_type const c = d->text_[pos];
2876         return lyx::isSpace(c);
2877 }
2878
2879
2880 Language const *
2881 Paragraph::getParLanguage(BufferParams const & bparams) const
2882 {
2883         if (!empty())
2884                 return getFirstFontSettings(bparams).language();
2885         // FIXME: we should check the prev par as well (Lgb)
2886         return bparams.language;
2887 }
2888
2889
2890 bool Paragraph::isRTL(BufferParams const & bparams) const
2891 {
2892         return lyxrc.rtl_support
2893                 && getParLanguage(bparams)->rightToLeft()
2894                 && !inInset().getLayout().forceLTR();
2895 }
2896
2897
2898 void Paragraph::changeLanguage(BufferParams const & bparams,
2899                                Language const * from, Language const * to)
2900 {
2901         // change language including dummy font change at the end
2902         for (pos_type i = 0; i <= size(); ++i) {
2903                 Font font = getFontSettings(bparams, i);
2904                 if (font.language() == from) {
2905                         font.setLanguage(to);
2906                         setFont(i, font);
2907                 }
2908         }
2909         d->requestSpellCheck(size());
2910 }
2911
2912
2913 bool Paragraph::isMultiLingual(BufferParams const & bparams) const
2914 {
2915         Language const * doc_language = bparams.language;
2916         FontList::const_iterator cit = d->fontlist_.begin();
2917         FontList::const_iterator end = d->fontlist_.end();
2918
2919         for (; cit != end; ++cit)
2920                 if (cit->font().language() != ignore_language &&
2921                     cit->font().language() != latex_language &&
2922                     cit->font().language() != doc_language)
2923                         return true;
2924         return false;
2925 }
2926
2927
2928 void Paragraph::getLanguages(std::set<Language const *> & languages) const
2929 {
2930         FontList::const_iterator cit = d->fontlist_.begin();
2931         FontList::const_iterator end = d->fontlist_.end();
2932
2933         for (; cit != end; ++cit) {
2934                 Language const * lang = cit->font().language();
2935                 if (lang != ignore_language &&
2936                     lang != latex_language)
2937                         languages.insert(lang);
2938         }
2939 }
2940
2941
2942 docstring Paragraph::asString(int options) const
2943 {
2944         return asString(0, size(), options);
2945 }
2946
2947
2948 docstring Paragraph::asString(pos_type beg, pos_type end, int options) const
2949 {
2950         odocstringstream os;
2951
2952         if (beg == 0
2953             && options & AS_STR_LABEL
2954             && !d->params_.labelString().empty())
2955                 os << d->params_.labelString() << ' ';
2956
2957         for (pos_type i = beg; i < end; ++i) {
2958                 if ((options & AS_STR_SKIPDELETE) && isDeleted(i))
2959                         continue;
2960                 char_type const c = d->text_[i];
2961                 if (isPrintable(c) || c == '\t'
2962                     || (c == '\n' && (options & AS_STR_NEWLINES)))
2963                         os.put(c);
2964                 else if (c == META_INSET && (options & AS_STR_INSETS)) {
2965                         getInset(i)->toString(os);
2966                         if (getInset(i)->asInsetMath())
2967                                 os << " ";
2968                 }
2969         }
2970
2971         return os.str();
2972 }
2973
2974
2975 void Paragraph::forToc(docstring & os, size_t maxlen) const
2976 {
2977         if (!d->params_.labelString().empty())
2978                 os += d->params_.labelString() + ' ';
2979         for (pos_type i = 0; i < size() && os.length() < maxlen; ++i) {
2980                 if (isDeleted(i))
2981                         continue;
2982                 char_type const c = d->text_[i];
2983                 if (isPrintable(c))
2984                         os += c;
2985                 else if (c == '\t' || c == '\n')
2986                         os += ' ';
2987                 else if (c == META_INSET)
2988                         getInset(i)->forToc(os, maxlen);
2989         }
2990 }
2991
2992
2993 docstring Paragraph::stringify(pos_type beg, pos_type end, int options, OutputParams & runparams) const
2994 {
2995         odocstringstream os;
2996
2997         if (beg == 0
2998                 && options & AS_STR_LABEL
2999                 && !d->params_.labelString().empty())
3000                 os << d->params_.labelString() << ' ';
3001
3002         for (pos_type i = beg; i < end; ++i) {
3003                 char_type const c = d->text_[i];
3004                 if (isPrintable(c) || c == '\t'
3005                     || (c == '\n' && (options & AS_STR_NEWLINES)))
3006                         os.put(c);
3007                 else if (c == META_INSET && (options & AS_STR_INSETS)) {
3008                         getInset(i)->plaintext(os, runparams);
3009                 }
3010         }
3011
3012         return os.str();
3013 }
3014
3015
3016 void Paragraph::setInsetOwner(Inset const * inset)
3017 {
3018         d->inset_owner_ = inset;
3019 }
3020
3021
3022 int Paragraph::id() const
3023 {
3024         return d->id_;
3025 }
3026
3027
3028 void Paragraph::setId(int id)
3029 {
3030         d->id_ = id;
3031 }
3032
3033
3034 Layout const & Paragraph::layout() const
3035 {
3036         return *d->layout_;
3037 }
3038
3039
3040 void Paragraph::setLayout(Layout const & layout)
3041 {
3042         d->layout_ = &layout;
3043 }
3044
3045
3046 void Paragraph::setDefaultLayout(DocumentClass const & tc)
3047 {
3048         setLayout(tc.defaultLayout());
3049 }
3050
3051
3052 void Paragraph::setPlainLayout(DocumentClass const & tc)
3053 {
3054         setLayout(tc.plainLayout());
3055 }
3056
3057
3058 void Paragraph::setPlainOrDefaultLayout(DocumentClass const & tclass)
3059 {
3060         if (usePlainLayout())
3061                 setPlainLayout(tclass);
3062         else
3063                 setDefaultLayout(tclass);
3064 }
3065
3066
3067 Inset const & Paragraph::inInset() const
3068 {
3069         LASSERT(d->inset_owner_, throw ExceptionMessage(BufferException,
3070                 _("Memory problem"), _("Paragraph not properly initialized")));
3071         return *d->inset_owner_;
3072 }
3073
3074
3075 ParagraphParameters & Paragraph::params()
3076 {
3077         return d->params_;
3078 }
3079
3080
3081 ParagraphParameters const & Paragraph::params() const
3082 {
3083         return d->params_;
3084 }
3085
3086
3087 bool Paragraph::isFreeSpacing() const
3088 {
3089         if (d->layout_->free_spacing)
3090                 return true;
3091         return d->inset_owner_ && d->inset_owner_->isFreeSpacing();
3092 }
3093
3094
3095 bool Paragraph::allowEmpty() const
3096 {
3097         if (d->layout_->keepempty)
3098                 return true;
3099         return d->inset_owner_ && d->inset_owner_->allowEmpty();
3100 }
3101
3102
3103 char_type Paragraph::transformChar(char_type c, pos_type pos) const
3104 {
3105         if (!Encodings::isArabicChar(c))
3106                 return c;
3107
3108         char_type prev_char = ' ';
3109         char_type next_char = ' ';
3110
3111         for (pos_type i = pos - 1; i >= 0; --i) {
3112                 char_type const par_char = d->text_[i];
3113                 if (!Encodings::isArabicComposeChar(par_char)) {
3114                         prev_char = par_char;
3115                         break;
3116                 }
3117         }
3118
3119         for (pos_type i = pos + 1, end = size(); i < end; ++i) {
3120                 char_type const par_char = d->text_[i];
3121                 if (!Encodings::isArabicComposeChar(par_char)) {
3122                         next_char = par_char;
3123                         break;
3124                 }
3125         }
3126
3127         if (Encodings::isArabicChar(next_char)) {
3128                 if (Encodings::isArabicChar(prev_char) &&
3129                         !Encodings::isArabicSpecialChar(prev_char))
3130                         return Encodings::transformChar(c, Encodings::FORM_MEDIAL);
3131                 else
3132                         return Encodings::transformChar(c, Encodings::FORM_INITIAL);
3133         } else {
3134                 if (Encodings::isArabicChar(prev_char) &&
3135                         !Encodings::isArabicSpecialChar(prev_char))
3136                         return Encodings::transformChar(c, Encodings::FORM_FINAL);
3137                 else
3138                         return Encodings::transformChar(c, Encodings::FORM_ISOLATED);
3139         }
3140 }
3141
3142
3143 int Paragraph::checkBiblio(Buffer const & buffer)
3144 {
3145         // FIXME From JS:
3146         // This is getting more and more a mess. ...We really should clean
3147         // up this bibitem issue for 1.6.
3148
3149         // Add bibitem insets if necessary
3150         if (d->layout_->labeltype != LABEL_BIBLIO)
3151                 return 0;
3152
3153         bool hasbibitem = !d->insetlist_.empty()
3154                 // Insist on it being in pos 0
3155                 && d->text_[0] == META_INSET
3156                 && d->insetlist_.begin()->inset->lyxCode() == BIBITEM_CODE;
3157
3158         bool track_changes = buffer.params().trackChanges;
3159
3160         docstring oldkey;
3161         docstring oldlabel;
3162
3163         // remove a bibitem in pos != 0
3164         // restore it later in pos 0 if necessary
3165         // (e.g. if a user inserts contents _before_ the item)
3166         // we're assuming there's only one of these, which there
3167         // should be.
3168         int erasedInsetPosition = -1;
3169         InsetList::iterator it = d->insetlist_.begin();
3170         InsetList::iterator end = d->insetlist_.end();
3171         for (; it != end; ++it)
3172                 if (it->inset->lyxCode() == BIBITEM_CODE
3173                       && it->pos > 0) {
3174                         InsetCommand * olditem = it->inset->asInsetCommand();
3175                         oldkey = olditem->getParam("key");
3176                         oldlabel = olditem->getParam("label");
3177                         erasedInsetPosition = it->pos;
3178                         eraseChar(erasedInsetPosition, track_changes);
3179                         break;
3180         }
3181
3182         // There was an InsetBibitem at the beginning, and we didn't
3183         // have to erase one.
3184         if (hasbibitem && erasedInsetPosition < 0)
3185                         return 0;
3186
3187         // There was an InsetBibitem at the beginning and we did have to
3188         // erase one. So we give its properties to the beginning inset.
3189         if (hasbibitem) {
3190                 InsetCommand * inset = d->insetlist_.begin()->inset->asInsetCommand();
3191                 if (!oldkey.empty())
3192                         inset->setParam("key", oldkey);
3193                 inset->setParam("label", oldlabel);
3194                 return -erasedInsetPosition;
3195         }
3196
3197         // There was no inset at the beginning, so we need to create one with
3198         // the key and label of the one we erased.
3199         InsetBibitem * inset =
3200                 new InsetBibitem(const_cast<Buffer *>(&buffer), InsetCommandParams(BIBITEM_CODE));
3201         // restore values of previously deleted item in this par.
3202         if (!oldkey.empty())
3203                 inset->setParam("key", oldkey);
3204         inset->setParam("label", oldlabel);
3205         insertInset(0, inset,
3206                     Change(track_changes ? Change::INSERTED : Change::UNCHANGED));
3207
3208         return 1;
3209 }
3210
3211
3212 void Paragraph::checkAuthors(AuthorList const & authorList)
3213 {
3214         d->changes_.checkAuthors(authorList);
3215 }
3216
3217
3218 bool Paragraph::isChanged(pos_type pos) const
3219 {
3220         return lookupChange(pos).changed();
3221 }
3222
3223
3224 bool Paragraph::isInserted(pos_type pos) const
3225 {
3226         return lookupChange(pos).inserted();
3227 }
3228
3229
3230 bool Paragraph::isDeleted(pos_type pos) const
3231 {
3232         return lookupChange(pos).deleted();
3233 }
3234
3235
3236 InsetList const & Paragraph::insetList() const
3237 {
3238         return d->insetlist_;
3239 }
3240
3241
3242 void Paragraph::setBuffer(Buffer & b)
3243 {
3244         d->insetlist_.setBuffer(b);
3245 }
3246
3247
3248 Inset * Paragraph::releaseInset(pos_type pos)
3249 {
3250         Inset * inset = d->insetlist_.release(pos);
3251         /// does not honour change tracking!
3252         eraseChar(pos, false);
3253         return inset;
3254 }
3255
3256
3257 Inset * Paragraph::getInset(pos_type pos)
3258 {
3259         return (pos < pos_type(d->text_.size()) && d->text_[pos] == META_INSET)
3260                  ? d->insetlist_.get(pos) : 0;
3261 }
3262
3263
3264 Inset const * Paragraph::getInset(pos_type pos) const
3265 {
3266         return (pos < pos_type(d->text_.size()) && d->text_[pos] == META_INSET)
3267                  ? d->insetlist_.get(pos) : 0;
3268 }
3269
3270
3271 void Paragraph::changeCase(BufferParams const & bparams, pos_type pos,
3272                 pos_type & right, TextCase action)
3273 {
3274         // process sequences of modified characters; in change
3275         // tracking mode, this approach results in much better
3276         // usability than changing case on a char-by-char basis
3277         docstring changes;
3278
3279         bool const trackChanges = bparams.trackChanges;
3280
3281         bool capitalize = true;
3282
3283         for (; pos < right; ++pos) {
3284                 char_type oldChar = d->text_[pos];
3285                 char_type newChar = oldChar;
3286
3287                 // ignore insets and don't play with deleted text!
3288                 if (oldChar != META_INSET && !isDeleted(pos)) {
3289                         switch (action) {
3290                                 case text_lowercase:
3291                                         newChar = lowercase(oldChar);
3292                                         break;
3293                                 case text_capitalization:
3294                                         if (capitalize) {
3295                                                 newChar = uppercase(oldChar);
3296                                                 capitalize = false;
3297                                         }
3298                                         break;
3299                                 case text_uppercase:
3300                                         newChar = uppercase(oldChar);
3301                                         break;
3302                         }
3303                 }
3304
3305                 if (isWordSeparator(pos) || isDeleted(pos)) {
3306                         // permit capitalization again
3307                         capitalize = true;
3308                 }
3309
3310                 if (oldChar != newChar) {
3311                         changes += newChar;
3312                         if (pos != right - 1)
3313                                 continue;
3314                         // step behind the changing area
3315                         pos++;
3316                 }
3317
3318                 int erasePos = pos - changes.size();
3319                 for (size_t i = 0; i < changes.size(); i++) {
3320                         insertChar(pos, changes[i],
3321                                    getFontSettings(bparams,
3322                                                    erasePos),
3323                                    trackChanges);
3324                         if (!eraseChar(erasePos, trackChanges)) {
3325                                 ++erasePos;
3326                                 ++pos; // advance
3327                                 ++right; // expand selection
3328                         }
3329                 }
3330                 changes.clear();
3331         }
3332 }
3333
3334
3335 int Paragraph::find(docstring const & str, bool cs, bool mw,
3336                 pos_type start_pos, bool del) const
3337 {
3338         pos_type pos = start_pos;
3339         int const strsize = str.length();
3340         int i = 0;
3341         pos_type const parsize = d->text_.size();
3342         for (i = 0; i < strsize && pos < parsize; ++i, ++pos) {
3343                 // Ignore ligature break and hyphenation chars while searching
3344                 while (pos < parsize - 1 && isInset(pos)) {
3345                         const InsetSpecialChar *isc = dynamic_cast<const InsetSpecialChar*>(getInset(pos));
3346                         if (isc == 0
3347                             || (isc->kind() != InsetSpecialChar::HYPHENATION
3348                                 && isc->kind() != InsetSpecialChar::LIGATURE_BREAK))
3349                                 break;
3350                         pos++;
3351                 }
3352                 if (cs && str[i] != d->text_[pos])
3353                         break;
3354                 if (!cs && uppercase(str[i]) != uppercase(d->text_[pos]))
3355                         break;
3356                 if (!del && isDeleted(pos))
3357                         break;
3358         }
3359
3360         if (i != strsize)
3361                 return 0;
3362
3363         // if necessary, check whether string matches word
3364         if (mw) {
3365                 if (start_pos > 0 && !isWordSeparator(start_pos - 1))
3366                         return 0;
3367                 if (pos < parsize
3368                         && !isWordSeparator(pos))
3369                         return 0;
3370         }
3371
3372         return pos - start_pos;
3373 }
3374
3375
3376 char_type Paragraph::getChar(pos_type pos) const
3377 {
3378         return d->text_[pos];
3379 }
3380
3381
3382 pos_type Paragraph::size() const
3383 {
3384         return d->text_.size();
3385 }
3386
3387
3388 bool Paragraph::empty() const
3389 {
3390         return d->text_.empty();
3391 }
3392
3393
3394 bool Paragraph::isInset(pos_type pos) const
3395 {
3396         return d->text_[pos] == META_INSET;
3397 }
3398
3399
3400 bool Paragraph::isSeparator(pos_type pos) const
3401 {
3402         //FIXME: Are we sure this can be the only separator?
3403         return d->text_[pos] == ' ';
3404 }
3405
3406
3407 void Paragraph::deregisterWords()
3408 {
3409         Private::LangWordsMap::const_iterator itl = d->words_.begin();
3410         Private::LangWordsMap::const_iterator ite = d->words_.end();
3411         for (; itl != ite; ++itl) {
3412                 WordList * wl = theWordList(itl->first);
3413                 Private::Words::const_iterator it = (itl->second).begin();
3414                 Private::Words::const_iterator et = (itl->second).end();
3415                 for (; it != et; ++it)
3416                         wl->remove(*it);
3417         }
3418         d->words_.clear();
3419 }
3420
3421
3422 void Paragraph::locateWord(pos_type & from, pos_type & to,
3423         word_location const loc) const
3424 {
3425         switch (loc) {
3426         case WHOLE_WORD_STRICT:
3427                 if (from == 0 || from == size()
3428                     || isWordSeparator(from)
3429                     || isWordSeparator(from - 1)) {
3430                         to = from;
3431                         return;
3432                 }
3433                 // no break here, we go to the next
3434
3435         case WHOLE_WORD:
3436                 // If we are already at the beginning of a word, do nothing
3437                 if (!from || isWordSeparator(from - 1))
3438                         break;
3439                 // no break here, we go to the next
3440
3441         case PREVIOUS_WORD:
3442                 // always move the cursor to the beginning of previous word
3443                 while (from && !isWordSeparator(from - 1))
3444                         --from;
3445                 break;
3446         case NEXT_WORD:
3447                 LYXERR0("Paragraph::locateWord: NEXT_WORD not implemented yet");
3448                 break;
3449         case PARTIAL_WORD:
3450                 // no need to move the 'from' cursor
3451                 break;
3452         }
3453         to = from;
3454         while (to < size() && !isWordSeparator(to))
3455                 ++to;
3456 }
3457
3458
3459 void Paragraph::collectWords()
3460 {
3461         // This is the value that needs to be exposed in the preferences
3462         // to resolve bug #6760.
3463         static int minlength = 6;
3464         pos_type n = size();
3465         for (pos_type pos = 0; pos < n; ++pos) {
3466                 if (isWordSeparator(pos))
3467                         continue;
3468                 pos_type from = pos;
3469                 locateWord(from, pos, WHOLE_WORD);
3470                 if (pos - from >= minlength) {
3471                         docstring word = asString(from, pos, AS_STR_NONE);
3472                         FontList::const_iterator cit = d->fontlist_.fontIterator(pos);
3473                         if (cit == d->fontlist_.end())
3474                                 return;
3475                         Language const * lang = cit->font().language();
3476                         d->words_[*lang].insert(word);
3477                 }
3478         }
3479 }
3480
3481
3482 void Paragraph::registerWords()
3483 {
3484         Private::LangWordsMap::const_iterator itl = d->words_.begin();
3485         Private::LangWordsMap::const_iterator ite = d->words_.end();
3486         for (; itl != ite; ++itl) {
3487                 WordList * wl = theWordList(itl->first);
3488                 Private::Words::const_iterator it = (itl->second).begin();
3489                 Private::Words::const_iterator et = (itl->second).end();
3490                 for (; it != et; ++it)
3491                         wl->insert(*it);
3492         }
3493 }
3494
3495
3496 void Paragraph::updateWords()
3497 {
3498         deregisterWords();
3499         collectWords();
3500         registerWords();
3501 }
3502
3503
3504 void Paragraph::Private::appendSkipPosition(SkipPositions & skips, pos_type const pos) const
3505 {
3506         SkipPositionsIterator begin = skips.begin();
3507         SkipPositions::iterator end = skips.end();
3508         if (pos > 0 && begin < end) {
3509                 --end;
3510                 if (end->last == pos - 1) {
3511                         end->last = pos;
3512                         return;
3513                 }
3514         }
3515         skips.insert(end, FontSpan(pos, pos));
3516 }
3517
3518
3519 Language * Paragraph::Private::locateSpellRange(
3520         pos_type & from, pos_type & to,
3521         SkipPositions & skips) const
3522 {
3523         // skip leading white space
3524         while (from < to && owner_->isWordSeparator(from))
3525                 ++from;
3526         // don't check empty range
3527         if (from >= to)
3528                 return 0;
3529         // get current language
3530         Language * lang = getSpellLanguage(from);
3531         pos_type last = from;
3532         bool samelang = true;
3533         bool sameinset = true;
3534         while (last < to && samelang && sameinset) {
3535                 // hop to end of word
3536                 while (last < to && !owner_->isWordSeparator(last)) {
3537                         if (owner_->getInset(last)) {
3538                                 appendSkipPosition(skips, last);
3539                         } else if (owner_->isDeleted(last)) {
3540                                 appendSkipPosition(skips, last);
3541                         }
3542                         ++last;
3543                 }
3544                 // hop to next word while checking for insets
3545                 while (sameinset && last < to && owner_->isWordSeparator(last)) {
3546                         if (Inset const * inset = owner_->getInset(last))
3547                                 sameinset = inset->isChar() && inset->isLetter();
3548                         if (sameinset && owner_->isDeleted(last)) {
3549                                 appendSkipPosition(skips, last);
3550                         }
3551                         if (sameinset)
3552                                 last++;
3553                 }
3554                 if (sameinset && last < to) {
3555                         // now check for language change
3556                         samelang = lang == getSpellLanguage(last);
3557                 }
3558         }
3559         // if language change detected backstep is needed
3560         if (!samelang)
3561                 --last;
3562         to = last;
3563         return lang;
3564 }
3565
3566
3567 Language * Paragraph::Private::getSpellLanguage(pos_type const from) const
3568 {
3569         Language * lang =
3570                 const_cast<Language *>(owner_->getFontSettings(
3571                         inset_owner_->buffer().params(), from).language());
3572         if (lang == inset_owner_->buffer().params().language
3573                 && !lyxrc.spellchecker_alt_lang.empty()) {
3574                 string lang_code;
3575                 string const lang_variety =
3576                         split(lyxrc.spellchecker_alt_lang, lang_code, '-');
3577                 lang->setCode(lang_code);
3578                 lang->setVariety(lang_variety);
3579         }
3580         return lang;
3581 }
3582
3583
3584 void Paragraph::requestSpellCheck(pos_type pos)
3585 {
3586         d->requestSpellCheck(pos == -1 ? size() : pos);
3587 }
3588
3589
3590 bool Paragraph::needsSpellCheck() const
3591 {
3592         SpellChecker::ChangeNumber speller_change_number = 0;
3593         if (theSpellChecker())
3594                 speller_change_number = theSpellChecker()->changeNumber();
3595         if (speller_change_number > d->speller_state_.currentChangeNumber()) {
3596                 d->speller_state_.needsCompleteRefresh(speller_change_number);
3597         }
3598         return d->needsSpellCheck();
3599 }
3600
3601
3602 bool Paragraph::Private::ignoreWord(docstring const & word) const
3603 {
3604         // Ignore words with digits
3605         // FIXME: make this customizable
3606         // (note that some checkers ignore words with digits by default)
3607         docstring::const_iterator cit = word.begin();
3608         docstring::const_iterator const end = word.end();
3609         for (; cit != end; ++cit) {
3610                 if (isNumber((*cit)))
3611                         return true;
3612         }
3613         return false;
3614 }
3615
3616
3617 SpellChecker::Result Paragraph::spellCheck(pos_type & from, pos_type & to,
3618         WordLangTuple & wl, docstring_list & suggestions,
3619         bool do_suggestion, bool check_learned) const
3620 {
3621         SpellChecker::Result result = SpellChecker::WORD_OK;
3622         SpellChecker * speller = theSpellChecker();
3623         if (!speller)
3624                 return result;
3625
3626         if (!d->layout_->spellcheck || !inInset().allowSpellCheck())
3627                 return result;
3628
3629         locateWord(from, to, WHOLE_WORD);
3630         if (from == to || from >= size())
3631                 return result;
3632
3633         docstring word = asString(from, to, AS_STR_INSETS | AS_STR_SKIPDELETE);
3634         Language * lang = d->getSpellLanguage(from);
3635
3636         wl = WordLangTuple(word, lang);
3637
3638         if (!word.size())
3639                 return result;
3640
3641         if (needsSpellCheck() || check_learned) {
3642                 if (!d->ignoreWord(word)) {
3643                         bool const trailing_dot = to < size() && d->text_[to] == '.';
3644                         result = speller->check(wl);
3645                         if (SpellChecker::misspelled(result) && trailing_dot) {
3646                                 wl = WordLangTuple(word.append(from_ascii(".")), lang);
3647                                 result = speller->check(wl);
3648                                 if (!SpellChecker::misspelled(result)) {
3649                                         LYXERR(Debug::GUI, "misspelled word is correct with dot: \"" <<
3650                                            word << "\" [" <<
3651                                            from << ".." << to << "]");
3652                                 } else {
3653                                         // spell check with dot appended failed
3654                                         // restore original word/lang value
3655                                         word = asString(from, to, AS_STR_INSETS | AS_STR_SKIPDELETE);
3656                                         wl = WordLangTuple(word, lang);
3657                                 }
3658                         }
3659                 }
3660                 d->setMisspelled(from, to, result);
3661         } else {
3662                 result = d->speller_state_.getState(from);
3663         }
3664
3665         bool const misspelled_ = SpellChecker::misspelled(result) ;
3666         if (misspelled_ && do_suggestion)
3667                 speller->suggest(wl, suggestions);
3668         else if (misspelled_)
3669                 LYXERR(Debug::GUI, "misspelled word: \"" <<
3670                            word << "\" [" <<
3671                            from << ".." << to << "]");
3672         else
3673                 suggestions.clear();
3674
3675         return result;
3676 }
3677
3678
3679 void Paragraph::Private::markMisspelledWords(
3680         pos_type const & first, pos_type const & last,
3681         SpellChecker::Result result,
3682         docstring const & word,
3683         SkipPositions const & skips)
3684 {
3685         if (!SpellChecker::misspelled(result)) {
3686                 setMisspelled(first, last, SpellChecker::WORD_OK);
3687                 return;
3688         }
3689         int snext = first;
3690         SpellChecker * speller = theSpellChecker();
3691         // locate and enumerate the error positions
3692         int nerrors = speller->numMisspelledWords();
3693         int numskipped = 0;
3694         SkipPositionsIterator it = skips.begin();
3695         SkipPositionsIterator et = skips.end();
3696         for (int index = 0; index < nerrors; ++index) {
3697                 int wstart;
3698                 int wlen = 0;
3699                 speller->misspelledWord(index, wstart, wlen);
3700                 /// should not happen if speller supports range checks
3701                 if (!wlen) continue;
3702                 docstring const misspelled = word.substr(wstart, wlen);
3703                 wstart += first + numskipped;
3704                 if (snext < wstart) {
3705                         /// mark the range of correct spelling
3706                         numskipped += countSkips(it, et, wstart);
3707                         setMisspelled(snext,
3708                                 wstart - 1, SpellChecker::WORD_OK);
3709                 }
3710                 snext = wstart + wlen;
3711                 numskipped += countSkips(it, et, snext);
3712                 /// mark the range of misspelling
3713                 setMisspelled(wstart, snext, result);
3714                 LYXERR(Debug::GUI, "misspelled word: \"" <<
3715                            misspelled << "\" [" <<
3716                            wstart << ".." << (snext-1) << "]");
3717                 ++snext;
3718         }
3719         if (snext <= last) {
3720                 /// mark the range of correct spelling at end
3721                 setMisspelled(snext, last, SpellChecker::WORD_OK);
3722         }
3723 }
3724
3725
3726 void Paragraph::spellCheck() const
3727 {
3728         SpellChecker * speller = theSpellChecker();
3729         if (!speller || !size() ||!needsSpellCheck())
3730                 return;
3731         pos_type start;
3732         pos_type endpos;
3733         d->rangeOfSpellCheck(start, endpos);
3734         if (speller->canCheckParagraph()) {
3735                 // loop until we leave the range
3736                 for (pos_type first = start; first < endpos; ) {
3737                         pos_type last = endpos;
3738                         Private::SkipPositions skips;
3739                         Language * lang = d->locateSpellRange(first, last, skips);
3740                         if (first >= endpos)
3741                                 break;
3742                         // start the spell checker on the unit of meaning
3743                         docstring word = asString(first, last, AS_STR_INSETS + AS_STR_SKIPDELETE);
3744                         WordLangTuple wl = WordLangTuple(word, lang);
3745                         SpellChecker::Result result = word.size() ?
3746                                 speller->check(wl) : SpellChecker::WORD_OK;
3747                         d->markMisspelledWords(first, last, result, word, skips);
3748                         first = ++last;
3749                 }
3750         } else {
3751                 static docstring_list suggestions;
3752                 pos_type to = endpos;
3753                 while (start < endpos) {
3754                         WordLangTuple wl;
3755                         spellCheck(start, to, wl, suggestions, false);
3756                         start = to + 1;
3757                 }
3758         }
3759         d->readySpellCheck();
3760 }
3761
3762
3763 bool Paragraph::isMisspelled(pos_type pos) const
3764 {
3765         return SpellChecker::misspelled(d->speller_state_.getState(pos));
3766 }
3767
3768
3769 string Paragraph::magicLabel() const
3770 {
3771         stringstream ss;
3772         ss << "magicparlabel-" << id();
3773         return ss.str();
3774 }
3775
3776
3777 } // namespace lyx