src/Paragraph.cpp

   1 /**
   2  * \file Paragraph.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Richard Heck (XHTML output)
   9  * \author Jean-Marc Lasgouttes
  10  * \author Angus Leeming
  11  * \author John Levon
  12  * \author André Pönitz
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "Paragraph.h"
  22
  23 #include "LayoutFile.h"
  24 #include "Buffer.h"
  25 #include "BufferParams.h"
  26 #include "Changes.h"
  27 #include "Counters.h"
  28 #include "BufferEncodings.h"
  29 #include "InsetList.h"
  30 #include "Language.h"
  31 #include "LaTeXFeatures.h"
  32 #include "Layout.h"
  33 #include "Length.h"
  34 #include "Font.h"
  35 #include "FontList.h"
  36 #include "LyXRC.h"
  37 #include "OutputParams.h"
  38 #include "output_latex.h"
  39 #include "output_xhtml.h"
  40 #include "ParagraphParameters.h"
  41 #include "SpellChecker.h"
  42 #include "sgml.h"
  43 #include "TextClass.h"
  44 #include "TexRow.h"
  45 #include "Text.h"
  46 #include "WordLangTuple.h"
  47 #include "WordList.h"
  48
  49 #include "frontends/alert.h"
  50
  51 #include "insets/InsetBibitem.h"
  52 #include "insets/InsetLabel.h"
  53 #include "insets/InsetSpecialChar.h"
  54
  55 #include "support/debug.h"
  56 #include "support/docstring_list.h"
  57 #include "support/ExceptionMessage.h"
  58 #include "support/gettext.h"
  59 #include "support/lassert.h"
  60 #include "support/lstrings.h"
  61 #include "support/textutils.h"
  62
  63 #include <sstream>
  64 #include <vector>
  65
  66 using namespace std;
  67 using namespace lyx::support;
  68
  69 namespace lyx {
  70
  71 namespace {
  72
  73 /// Inset identifier (above 0x10ffff, for ucs-4)
  74 char_type const META_INSET = 0x200001;
  75
  76 }
  77
  78
  79 /////////////////////////////////////////////////////////////////////
  80 //
  81 // SpellResultRange
  82 //
  83 /////////////////////////////////////////////////////////////////////
  84
  85 class SpellResultRange {
  86 public:
  87         SpellResultRange(FontSpan range, SpellChecker::Result result)
  88         : range_(range), result_(result)
  89         {}
  90         ///
  91         FontSpan const & range() const { return range_; }
  92         ///
  93         void range(FontSpan const & r) { range_ = r; }
  94         ///
  95         SpellChecker::Result result() const { return result_; }
  96         ///
  97         void result(SpellChecker::Result r) { result_ = r; }
  98         ///
  99         bool contains(pos_type pos) const { return range_.contains(pos); }
 100         ///
 101         bool covered(FontSpan const & r) const
 102         {
 103                 // 1. first of new range inside current range or
 104                 // 2. last of new range inside current range or
 105                 // 3. first of current range inside new range or
 106                 // 4. last of current range inside new range
 107                 //FIXME: is this the same as !range_.intersect(r).empty() ?
 108                 return range_.contains(r.first) || range_.contains(r.last) ||
 109                         r.contains(range_.first) || r.contains(range_.last);
 110         }
 111         ///
 112         void shift(pos_type pos, int offset)
 113         {
 114                 if (range_.first > pos) {
 115                         range_.first += offset;
 116                         range_.last += offset;
 117                 } else if (range_.last >= pos) {
 118                         range_.last += offset;
 119                 }
 120         }
 121 private:
 122         FontSpan range_ ;
 123         SpellChecker::Result result_ ;
 124 };
 125
 126
 127 /////////////////////////////////////////////////////////////////////
 128 //
 129 // SpellCheckerState
 130 //
 131 /////////////////////////////////////////////////////////////////////
 132
 133 class SpellCheckerState {
 134 public:
 135         SpellCheckerState()
 136         {
 137                 needs_refresh_ = true;
 138                 current_change_number_ = 0;
 139         }
 140
 141         void setRange(FontSpan const & fp, SpellChecker::Result state)
 142         {
 143                 Ranges result;
 144                 RangesIterator et = ranges_.end();
 145                 RangesIterator it = ranges_.begin();
 146                 for (; it != et; ++it) {
 147                         if (!it->covered(fp))
 148                                 result.push_back(SpellResultRange(it->range(), it->result()));
 149                         else if (state == SpellChecker::WORD_OK) {
 150                                 // trim or split the current misspelled range
 151                                 // store misspelled ranges only
 152                                 FontSpan range = it->range();
 153                                 if (fp.first > range.first) {
 154                                         // misspelled area in front of WORD_OK
 155                                         range.last = fp.first - 1;
 156                                         result.push_back(SpellResultRange(range, it->result()));
 157                                         range = it->range();
 158                                 }
 159                                 if (fp.last < range.last) {
 160                                         // misspelled area after WORD_OK range
 161                                         range.first = fp.last + 1;
 162                                         result.push_back(SpellResultRange(range, it->result()));
 163                                 }
 164                         }
 165                 }
 166                 ranges_ = result;
 167                 if (state != SpellChecker::WORD_OK)
 168                         ranges_.push_back(SpellResultRange(fp, state));
 169         }
 170
 171         void increasePosAfterPos(pos_type pos)
 172         {
 173                 correctRangesAfterPos(pos, 1);
 174                 needsRefresh(pos);
 175         }
 176
 177         void decreasePosAfterPos(pos_type pos)
 178         {
 179                 correctRangesAfterPos(pos, -1);
 180                 needsRefresh(pos);
 181         }
 182
 183         void refreshLast(pos_type pos)
 184         {
 185                 if (pos < refresh_.last)
 186                         refresh_.last = pos;
 187         }
 188
 189         SpellChecker::Result getState(pos_type pos) const
 190         {
 191                 SpellChecker::Result result = SpellChecker::WORD_OK;
 192                 RangesIterator et = ranges_.end();
 193                 RangesIterator it = ranges_.begin();
 194                 for (; it != et; ++it) {
 195                         if(it->contains(pos)) {
 196                                 return it->result();
 197                         }
 198                 }
 199                 return result;
 200         }
 201
 202         FontSpan const & getRange(pos_type pos) const
 203         {
 204                 /// empty span to indicate mismatch
 205                 static FontSpan empty_;
 206                 RangesIterator et = ranges_.end();
 207                 RangesIterator it = ranges_.begin();
 208                 for (; it != et; ++it) {
 209                         if(it->contains(pos)) {
 210                                 return it->range();
 211                         }
 212                 }
 213                 return empty_;
 214         }
 215
 216         bool needsRefresh() const
 217         {
 218                 return needs_refresh_;
 219         }
 220
 221         SpellChecker::ChangeNumber currentChangeNumber() const
 222         {
 223                 return current_change_number_;
 224         }
 225
 226         void refreshRange(pos_type & first, pos_type & last) const
 227         {
 228                 first = refresh_.first;
 229                 last = refresh_.last;
 230         }
 231
 232         void needsRefresh(pos_type pos)
 233         {
 234                 if (needs_refresh_ && pos != -1) {
 235                         if (pos < refresh_.first)
 236                                 refresh_.first = pos;
 237                         if (pos > refresh_.last)
 238                                 refresh_.last = pos;
 239                 } else if (pos != -1) {
 240                         // init request check for neighbour positions too
 241                         refresh_.first = pos > 0 ? pos - 1 : 0;
 242                         // no need for special end of paragraph check
 243                         refresh_.last = pos + 1;
 244                 }
 245                 needs_refresh_ = pos != -1;
 246         }
 247
 248         void needsCompleteRefresh(SpellChecker::ChangeNumber change_number)
 249         {
 250                 needs_refresh_ = true;
 251                 refresh_.first = 0;
 252                 refresh_.last = -1;
 253                 current_change_number_ = change_number;
 254         }
 255 private:
 256         typedef vector<SpellResultRange> Ranges;
 257         typedef Ranges::const_iterator RangesIterator;
 258         Ranges ranges_;
 259         /// the area of the paragraph with pending spell check
 260         FontSpan refresh_;
 261         bool needs_refresh_;
 262         /// spell state cache version number
 263         SpellChecker::ChangeNumber current_change_number_;
 264
 265
 266         void correctRangesAfterPos(pos_type pos, int offset)
 267         {
 268                 RangesIterator et = ranges_.end();
 269                 Ranges::iterator it = ranges_.begin();
 270                 for (; it != et; ++it) {
 271                         it->shift(pos, offset);
 272                 }
 273         }
 274
 275 };
 276
 277 /////////////////////////////////////////////////////////////////////
 278 //
 279 // Paragraph::Private
 280 //
 281 /////////////////////////////////////////////////////////////////////
 282
 283 class Paragraph::Private
 284 {
 285         // Enforce our own "copy" constructor by declaring the standard one and
 286         // the assignment operator private without implementing them.
 287         Private(Private const &);
 288         Private & operator=(Private const &);
 289 public:
 290         ///
 291         Private(Paragraph * owner, Layout const & layout);
 292         /// "Copy constructor"
 293         Private(Private const &, Paragraph * owner);
 294         /// Copy constructor from \p beg  to \p end
 295         Private(Private const &, Paragraph * owner, pos_type beg, pos_type end);
 296
 297         ///
 298         void insertChar(pos_type pos, char_type c, Change const & change);
 299
 300         /// Output the surrogate pair formed by \p c and \p next to \p os.
 301         /// \return the number of characters written.
 302         int latexSurrogatePair(otexstream & os, char_type c, char_type next,
 303                                OutputParams const &);
 304
 305         /// Output a space in appropriate formatting (or a surrogate pair
 306         /// if the next character is a combining character).
 307         /// \return whether a surrogate pair was output.
 308         bool simpleTeXBlanks(OutputParams const &,
 309                              otexstream &,
 310                              pos_type i,
 311                              unsigned int & column,
 312                              Font const & font,
 313                              Layout const & style);
 314
 315         /// Output consecutive unicode chars, belonging to the same script as
 316         /// specified by the latex macro \p ltx, to \p os starting from \p i.
 317         /// \return the number of characters written.
 318         int writeScriptChars(otexstream & os, docstring const & ltx,
 319                            Change const &, Encoding const &, pos_type & i);
 320
 321         /// This could go to ParagraphParameters if we want to.
 322         int startTeXParParams(BufferParams const &, otexstream &,
 323                               OutputParams const &) const;
 324
 325         /// This could go to ParagraphParameters if we want to.
 326         bool endTeXParParams(BufferParams const &, otexstream &,
 327                              OutputParams const &) const;
 328
 329         ///
 330         void latexInset(BufferParams const &,
 331                                    otexstream &,
 332                                    OutputParams &,
 333                                    Font & running_font,
 334                                    Font & basefont,
 335                                    Font const & outerfont,
 336                                    bool & open_font,
 337                                    Change & running_change,
 338                                    Layout const & style,
 339                                    pos_type & i,
 340                                    unsigned int & column);
 341
 342         ///
 343         void latexSpecialChar(
 344                                    otexstream & os,
 345                                    BufferParams const & bparams,
 346                                    OutputParams const & runparams,
 347                                    Font const & running_font,
 348                                    Change const & running_change,
 349                                    Layout const & style,
 350                                    pos_type & i,
 351                                    pos_type end_pos,
 352                                    unsigned int & column);
 353
 354         ///
 355         bool latexSpecialT1(
 356                 char_type const c,
 357                 otexstream & os,
 358                 pos_type i,
 359                 unsigned int & column);
 360         ///
 361         bool latexSpecialT3(
 362                 char_type const c,
 363                 otexstream & os,
 364                 pos_type i,
 365                 unsigned int & column);
 366
 367         ///
 368         void validate(LaTeXFeatures & features) const;
 369
 370         /// Checks if the paragraph contains only text and no inset or font change.
 371         bool onlyText(Buffer const & buf, Font const & outerfont,
 372                       pos_type initial) const;
 373
 374         /// a vector of speller skip positions
 375         typedef vector<FontSpan> SkipPositions;
 376         typedef SkipPositions::const_iterator SkipPositionsIterator;
 377
 378         void appendSkipPosition(SkipPositions & skips, pos_type const pos) const;
 379
 380         Language * getSpellLanguage(pos_type const from) const;
 381
 382         Language * locateSpellRange(pos_type & from, pos_type & to,
 383                                     SkipPositions & skips) const;
 384
 385         bool hasSpellerChange() const
 386         {
 387                 SpellChecker::ChangeNumber speller_change_number = 0;
 388                 if (theSpellChecker())
 389                         speller_change_number = theSpellChecker()->changeNumber();
 390                 return speller_change_number > speller_state_.currentChangeNumber();
 391         }
 392
 393         bool ignoreWord(docstring const & word) const ;
 394
 395         void setMisspelled(pos_type from, pos_type to, SpellChecker::Result state)
 396         {
 397                 pos_type textsize = owner_->size();
 398                 // check for sane arguments
 399                 if (to <= from || from >= textsize)
 400                         return;
 401                 FontSpan fp = FontSpan(from, to - 1);
 402                 speller_state_.setRange(fp, state);
 403         }
 404
 405         void requestSpellCheck(pos_type pos)
 406         {
 407                 if (pos == -1)
 408                         speller_state_.needsCompleteRefresh(speller_state_.currentChangeNumber());
 409                 else
 410                         speller_state_.needsRefresh(pos);
 411         }
 412
 413         void readySpellCheck()
 414         {
 415                 speller_state_.needsRefresh(-1);
 416         }
 417
 418         bool needsSpellCheck() const
 419         {
 420                 return speller_state_.needsRefresh();
 421         }
 422
 423         void rangeOfSpellCheck(pos_type & first, pos_type & last) const
 424         {
 425                 speller_state_.refreshRange(first, last);
 426                 if (last == -1) {
 427                         last = owner_->size();
 428                         return;
 429                 }
 430                 pos_type endpos = last;
 431                 owner_->locateWord(first, endpos, WHOLE_WORD);
 432                 if (endpos < last) {
 433                         endpos = last;
 434                         owner_->locateWord(last, endpos, WHOLE_WORD);
 435                 }
 436                 last = endpos;
 437         }
 438
 439         int countSkips(SkipPositionsIterator & it, SkipPositionsIterator const et,
 440                             int & start) const
 441         {
 442                 int numskips = 0;
 443                 while (it != et && it->first < start) {
 444                         int skip = it->last - it->first + 1;
 445                         start += skip;
 446                         numskips += skip;
 447                         ++it;
 448                 }
 449                 return numskips;
 450         }
 451
 452         void markMisspelledWords(pos_type const & first, pos_type const & last,
 453                                                          SpellChecker::Result result,
 454                                                          docstring const & word,
 455                                                          SkipPositions const & skips);
 456
 457         InsetCode ownerCode() const
 458         {
 459                 return inset_owner_ ? inset_owner_->lyxCode() : NO_CODE;
 460         }
 461
 462         /// Which Paragraph owns us?
 463         Paragraph * owner_;
 464
 465         /// In which Inset?
 466         Inset const * inset_owner_;
 467
 468         ///
 469         FontList fontlist_;
 470
 471         ///
 472         int id_;
 473
 474         ///
 475         ParagraphParameters params_;
 476
 477         /// for recording and looking up changes
 478         Changes changes_;
 479
 480         ///
 481         InsetList insetlist_;
 482
 483         /// end of label
 484         pos_type begin_of_body_;
 485
 486         typedef docstring TextContainer;
 487         ///
 488         TextContainer text_;
 489
 490         typedef set<docstring> Words;
 491         typedef map<string, Words> LangWordsMap;
 492         ///
 493         LangWordsMap words_;
 494         ///
 495         Layout const * layout_;
 496         ///
 497         SpellCheckerState speller_state_;
 498 };
 499
 500
 501 Paragraph::Private::Private(Paragraph * owner, Layout const & layout)
 502         : owner_(owner), inset_owner_(0), id_(-1), begin_of_body_(0), layout_(&layout)
 503 {
 504         text_.reserve(100);
 505 }
 506
 507
 508 // Initialization of the counter for the paragraph id's,
 509 //
 510 // FIXME: There should be a more intelligent way to generate and use the
 511 // paragraph ids per buffer instead a global static counter for all InsetText
 512 // in the running program.
 513 static int paragraph_id = -1;
 514
 515 Paragraph::Private::Private(Private const & p, Paragraph * owner)
 516         : owner_(owner), inset_owner_(p.inset_owner_), fontlist_(p.fontlist_),
 517           params_(p.params_), changes_(p.changes_), insetlist_(p.insetlist_),
 518           begin_of_body_(p.begin_of_body_), text_(p.text_), words_(p.words_),
 519           layout_(p.layout_)
 520 {
 521         id_ = ++paragraph_id;
 522         requestSpellCheck(p.text_.size());
 523 }
 524
 525
 526 Paragraph::Private::Private(Private const & p, Paragraph * owner,
 527         pos_type beg, pos_type end)
 528         : owner_(owner), inset_owner_(p.inset_owner_),
 529           params_(p.params_), changes_(p.changes_),
 530           insetlist_(p.insetlist_, beg, end),
 531           begin_of_body_(p.begin_of_body_), words_(p.words_),
 532           layout_(p.layout_)
 533 {
 534         id_ = ++paragraph_id;
 535         if (beg >= pos_type(p.text_.size()))
 536                 return;
 537         text_ = p.text_.substr(beg, end - beg);
 538
 539         FontList::const_iterator fcit = fontlist_.begin();
 540         FontList::const_iterator fend = fontlist_.end();
 541         for (; fcit != fend; ++fcit) {
 542                 if (fcit->pos() < beg)
 543                         continue;
 544                 if (fcit->pos() >= end) {
 545                         // Add last entry in the fontlist_.
 546                         fontlist_.set(text_.size() - 1, fcit->font());
 547                         break;
 548                 }
 549                 // Add a new entry in the fontlist_.
 550                 fontlist_.set(fcit->pos() - beg, fcit->font());
 551         }
 552         requestSpellCheck(p.text_.size());
 553 }
 554
 555
 556 void Paragraph::addChangesToToc(DocIterator const & cdit,
 557         Buffer const & buf, bool output_active) const
 558 {
 559         d->changes_.addToToc(cdit, buf, output_active);
 560 }
 561
 562
 563 bool Paragraph::isDeleted(pos_type start, pos_type end) const
 564 {
 565         LASSERT(start >= 0 && start <= size(), return false);
 566         LASSERT(end > start && end <= size() + 1, return false);
 567
 568         return d->changes_.isDeleted(start, end);
 569 }
 570
 571
 572 bool Paragraph::isChanged(pos_type start, pos_type end) const
 573 {
 574         LASSERT(start >= 0 && start <= size(), return false);
 575         LASSERT(end > start && end <= size() + 1, return false);
 576
 577         return d->changes_.isChanged(start, end);
 578 }
 579
 580
 581 bool Paragraph::isMergedOnEndOfParDeletion(bool trackChanges) const
 582 {
 583         // keep the logic here in sync with the logic of eraseChars()
 584         if (!trackChanges)
 585                 return true;
 586
 587         Change const & change = d->changes_.lookup(size());
 588         return change.inserted() && change.currentAuthor();
 589 }
 590
 591
 592 void Paragraph::setChange(Change const & change)
 593 {
 594         // beware of the imaginary end-of-par character!
 595         d->changes_.set(change, 0, size() + 1);
 596
 597         /*
 598          * Propagate the change recursively - but not in case of DELETED!
 599          *
 600          * Imagine that your co-author makes changes in an existing inset. He
 601          * sends your document to you and you come to the conclusion that the
 602          * inset should go completely. If you erase it, LyX must not delete all
 603          * text within the inset. Otherwise, the change tracked insertions of
 604          * your co-author get lost and there is no way to restore them later.
 605          *
 606          * Conclusion: An inset's content should remain untouched if you delete it
 607          */
 608
 609         if (!change.deleted()) {
 610                 for (pos_type pos = 0; pos < size(); ++pos) {
 611                         if (Inset * inset = getInset(pos))
 612                                 inset->setChange(change);
 613                 }
 614         }
 615 }
 616
 617
 618 void Paragraph::setChange(pos_type pos, Change const & change)
 619 {
 620         LASSERT(pos >= 0 && pos <= size(), return);
 621         d->changes_.set(change, pos);
 622
 623         // see comment in setChange(Change const &) above
 624         if (!change.deleted() && pos < size())
 625                         if (Inset * inset = getInset(pos))
 626                                 inset->setChange(change);
 627 }
 628
 629
 630 Change const & Paragraph::lookupChange(pos_type pos) const
 631 {
 632         LBUFERR(pos >= 0 && pos <= size());
 633         return d->changes_.lookup(pos);
 634 }
 635
 636
 637 void Paragraph::acceptChanges(pos_type start, pos_type end)
 638 {
 639         LASSERT(start >= 0 && start <= size(), return);
 640         LASSERT(end > start && end <= size() + 1, return);
 641
 642         for (pos_type pos = start; pos < end; ++pos) {
 643                 switch (lookupChange(pos).type) {
 644                         case Change::UNCHANGED:
 645                                 // accept changes in nested inset
 646                                 if (Inset * inset = getInset(pos))
 647                                         inset->acceptChanges();
 648                                 break;
 649
 650                         case Change::INSERTED:
 651                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 652                                 // also accept changes in nested inset
 653                                 if (Inset * inset = getInset(pos))
 654                                         inset->acceptChanges();
 655                                 break;
 656
 657                         case Change::DELETED:
 658                                 // Suppress access to non-existent
 659                                 // "end-of-paragraph char"
 660                                 if (pos < size()) {
 661                                         eraseChar(pos, false);
 662                                         --end;
 663                                         --pos;
 664                                 }
 665                                 break;
 666                 }
 667
 668         }
 669 }
 670
 671
 672 void Paragraph::rejectChanges(pos_type start, pos_type end)
 673 {
 674         LASSERT(start >= 0 && start <= size(), return);
 675         LASSERT(end > start && end <= size() + 1, return);
 676
 677         for (pos_type pos = start; pos < end; ++pos) {
 678                 switch (lookupChange(pos).type) {
 679                         case Change::UNCHANGED:
 680                                 // reject changes in nested inset
 681                                 if (Inset * inset = getInset(pos))
 682                                                 inset->rejectChanges();
 683                                 break;
 684
 685                         case Change::INSERTED:
 686                                 // Suppress access to non-existent
 687                                 // "end-of-paragraph char"
 688                                 if (pos < size()) {
 689                                         eraseChar(pos, false);
 690                                         --end;
 691                                         --pos;
 692                                 }
 693                                 break;
 694
 695                         case Change::DELETED:
 696                                 d->changes_.set(Change(Change::UNCHANGED), pos);
 697
 698                                 // Do NOT reject changes within a deleted inset!
 699                                 // There may be insertions of a co-author inside of it!
 700
 701                                 break;
 702                 }
 703         }
 704 }
 705
 706
 707 void Paragraph::Private::insertChar(pos_type pos, char_type c,
 708                 Change const & change)
 709 {
 710         LASSERT(pos >= 0 && pos <= int(text_.size()), return);
 711
 712         // track change
 713         changes_.insert(change, pos);
 714
 715         // This is actually very common when parsing buffers (and
 716         // maybe inserting ascii text)
 717         if (pos == pos_type(text_.size())) {
 718                 // when appending characters, no need to update tables
 719                 text_.push_back(c);
 720                 // but we want spell checking
 721                 requestSpellCheck(pos);
 722                 return;
 723         }
 724
 725         text_.insert(text_.begin() + pos, c);
 726
 727         // Update the font table.
 728         fontlist_.increasePosAfterPos(pos);
 729
 730         // Update the insets
 731         insetlist_.increasePosAfterPos(pos);
 732
 733         // Update list of misspelled positions
 734         speller_state_.increasePosAfterPos(pos);
 735 }
 736
 737
 738 bool Paragraph::insertInset(pos_type pos, Inset * inset,
 739                                    Font const & font, Change const & change)
 740 {
 741         LASSERT(inset, return false);
 742         LASSERT(pos >= 0 && pos <= size(), return false);
 743
 744         // Paragraph::insertInset() can be used in cut/copy/paste operation where
 745         // d->inset_owner_ is not set yet.
 746         if (d->inset_owner_ && !d->inset_owner_->insetAllowed(inset->lyxCode()))
 747                 return false;
 748
 749         d->insertChar(pos, META_INSET, change);
 750         LASSERT(d->text_[pos] == META_INSET, return false);
 751
 752         // Add a new entry in the insetlist_.
 753         d->insetlist_.insert(inset, pos);
 754
 755         // Some insets require run of spell checker
 756         requestSpellCheck(pos);
 757         setFont(pos, font);
 758         return true;
 759 }
 760
 761
 762 bool Paragraph::eraseChar(pos_type pos, bool trackChanges)
 763 {
 764         LASSERT(pos >= 0 && pos <= size(), return false);
 765
 766         // keep the logic here in sync with the logic of isMergedOnEndOfParDeletion()
 767
 768         if (trackChanges) {
 769                 Change change = d->changes_.lookup(pos);
 770
 771                 // set the character to DELETED if
 772                 //  a) it was previously unchanged or
 773                 //  b) it was inserted by a co-author
 774
 775                 if (!change.changed() ||
 776                       (change.inserted() && !change.currentAuthor())) {
 777                         setChange(pos, Change(Change::DELETED));
 778                         // request run of spell checker
 779                         requestSpellCheck(pos);
 780                         return false;
 781                 }
 782
 783                 if (change.deleted())
 784                         return false;
 785         }
 786
 787         // Don't physically access the imaginary end-of-paragraph character.
 788         // eraseChar() can only mark it as DELETED. A physical deletion of
 789         // end-of-par must be handled externally.
 790         if (pos == size()) {
 791                 return false;
 792         }
 793
 794         // track change
 795         d->changes_.erase(pos);
 796
 797         // if it is an inset, delete the inset entry
 798         if (d->text_[pos] == META_INSET)
 799                 d->insetlist_.erase(pos);
 800
 801         d->text_.erase(d->text_.begin() + pos);
 802
 803         // Update the fontlist_
 804         d->fontlist_.erase(pos);
 805
 806         // Update the insetlist_
 807         d->insetlist_.decreasePosAfterPos(pos);
 808
 809         // Update list of misspelled positions
 810         d->speller_state_.decreasePosAfterPos(pos);
 811         d->speller_state_.refreshLast(size());
 812
 813         return true;
 814 }
 815
 816
 817 int Paragraph::eraseChars(pos_type start, pos_type end, bool trackChanges)
 818 {
 819         LASSERT(start >= 0 && start <= size(), return 0);
 820         LASSERT(end >= start && end <= size() + 1, return 0);
 821
 822         pos_type i = start;
 823         for (pos_type count = end - start; count; --count) {
 824                 if (!eraseChar(i, trackChanges))
 825                         ++i;
 826         }
 827         return end - i;
 828 }
 829
 830
 831 int Paragraph::Private::latexSurrogatePair(otexstream & os, char_type c,
 832                 char_type next, OutputParams const & runparams)
 833 {
 834         // Writing next here may circumvent a possible font change between
 835         // c and next. Since next is only output if it forms a surrogate pair
 836         // with c we can ignore this:
 837         // A font change inside a surrogate pair does not make sense and is
 838         // hopefully impossible to input.
 839         // FIXME: change tracking
 840         // Is this correct WRT change tracking?
 841         Encoding const & encoding = *(runparams.encoding);
 842         docstring latex1 = encoding.latexChar(next).first;
 843         if (runparams.inIPA) {
 844                 string const tipashortcut = Encodings::TIPAShortcut(next);
 845                 if (!tipashortcut.empty()) {
 846                         latex1 = from_ascii(tipashortcut);
 847                 }
 848         }
 849         docstring const latex2 = encoding.latexChar(c).first;
 850         if (docstring(1, next) == latex1) {
 851                 // the encoding supports the combination
 852                 os << latex2 << latex1;
 853                 return latex1.length() + latex2.length();
 854         } else if (runparams.local_font &&
 855                    runparams.local_font->language()->lang() == "polutonikogreek") {
 856                 // polutonikogreek only works without the brackets
 857                 os << latex1 << latex2;
 858                 return latex1.length() + latex2.length();
 859         } else
 860                 os << latex1 << '{' << latex2 << '}';
 861         return latex1.length() + latex2.length() + 2;
 862 }
 863
 864
 865 bool Paragraph::Private::simpleTeXBlanks(OutputParams const & runparams,
 866                                        otexstream & os,
 867                                        pos_type i,
 868                                        unsigned int & column,
 869                                        Font const & font,
 870                                        Layout const & style)
 871 {
 872         if (style.pass_thru || runparams.pass_thru)
 873                 return false;
 874
 875         if (i + 1 < int(text_.size())) {
 876                 char_type next = text_[i + 1];
 877                 if (Encodings::isCombiningChar(next)) {
 878                         // This space has an accent, so we must always output it.
 879                         column += latexSurrogatePair(os, ' ', next, runparams) - 1;
 880                         return true;
 881                 }
 882         }
 883
 884         if (runparams.linelen > 0
 885             && column > runparams.linelen
 886             && i
 887             && text_[i - 1] != ' '
 888             && (i + 1 < int(text_.size()))
 889             // same in FreeSpacing mode
 890             && !owner_->isFreeSpacing()
 891             // In typewriter mode, we want to avoid
 892             // ! . ? : at the end of a line
 893             && !(font.fontInfo().family() == TYPEWRITER_FAMILY
 894                  && (text_[i - 1] == '.'
 895                      || text_[i - 1] == '?'
 896                      || text_[i - 1] == ':'
 897                      || text_[i - 1] == '!'))) {
 898                 os << '\n';
 899                 os.texrow().start(owner_->id(), i + 1);
 900                 column = 0;
 901         } else if (style.free_spacing) {
 902                 os << '~';
 903         } else {
 904                 os << ' ';
 905         }
 906         return false;
 907 }
 908
 909
 910 int Paragraph::Private::writeScriptChars(otexstream & os,
 911                                          docstring const & ltx,
 912                                          Change const & runningChange,
 913                                          Encoding const & encoding,
 914                                          pos_type & i)
 915 {
 916         // FIXME: modifying i here is not very nice...
 917
 918         // We only arrive here when a proper language for character text_[i] has
 919         // not been specified (i.e., it could not be translated in the current
 920         // latex encoding) or its latex translation has been forced, and it
 921         // belongs to a known script.
 922         // Parameter ltx contains the latex translation of text_[i] as specified
 923         // in the unicodesymbols file and is something like "\textXXX{<spec>}".
 924         // The latex macro name "textXXX" specifies the script to which text_[i]
 925         // belongs and we use it in order to check whether characters from the
 926         // same script immediately follow, such that we can collect them in a
 927         // single "\textXXX" macro. So, we have to retain "\textXXX{<spec>"
 928         // for the first char but only "<spec>" for all subsequent chars.
 929         docstring::size_type const brace1 = ltx.find_first_of(from_ascii("{"));
 930         docstring::size_type const brace2 = ltx.find_last_of(from_ascii("}"));
 931         string script = to_ascii(ltx.substr(1, brace1 - 1));
 932         int pos = 0;
 933         int length = brace2;
 934         bool closing_brace = true;
 935         if (script == "textgreek" && encoding.latexName() == "iso-8859-7") {
 936                 // Correct encoding is being used, so we can avoid \textgreek.
 937                 pos = brace1 + 1;
 938                 length -= pos;
 939                 closing_brace = false;
 940         }
 941         os << ltx.substr(pos, length);
 942         int size = text_.size();
 943         while (i + 1 < size) {
 944                 char_type const next = text_[i + 1];
 945                 // Stop here if next character belongs to another script
 946                 // or there is a change in change tracking status.
 947                 if (!Encodings::isKnownScriptChar(next, script) ||
 948                     runningChange != owner_->lookupChange(i + 1))
 949                         break;
 950                 Font prev_font;
 951                 bool found = false;
 952                 FontList::const_iterator cit = fontlist_.begin();
 953                 FontList::const_iterator end = fontlist_.end();
 954                 for (; cit != end; ++cit) {
 955                         if (cit->pos() >= i && !found) {
 956                                 prev_font = cit->font();
 957                                 found = true;
 958                         }
 959                         if (cit->pos() >= i + 1)
 960                                 break;
 961                 }
 962                 // Stop here if there is a font attribute or encoding change.
 963                 if (found && cit != end && prev_font != cit->font())
 964                         break;
 965                 docstring const latex = encoding.latexChar(next).first;
 966                 docstring::size_type const b1 =
 967                                         latex.find_first_of(from_ascii("{"));
 968                 docstring::size_type const b2 =
 969                                         latex.find_last_of(from_ascii("}"));
 970                 int const len = b2 - b1 - 1;
 971                 os << latex.substr(b1 + 1, len);
 972                 length += len;
 973                 ++i;
 974         }
 975         if (closing_brace) {
 976                 os << '}';
 977                 ++length;
 978         }
 979         return length;
 980 }
 981
 982
 983 void Paragraph::Private::latexInset(BufferParams const & bparams,
 984                                     otexstream & os,
 985                                     OutputParams & runparams,
 986                                     Font & running_font,
 987                                     Font & basefont,
 988                                     Font const & outerfont,
 989                                     bool & open_font,
 990                                     Change & running_change,
 991                                     Layout const & style,
 992                                     pos_type & i,
 993                                     unsigned int & column)
 994 {
 995         Inset * inset = owner_->getInset(i);
 996         LBUFERR(inset);
 997
 998         if (style.pass_thru) {
 999                 odocstringstream ods;
1000                 inset->plaintext(ods, runparams);
1001                 os << ods.str();
1002                 return;
1003         }
1004
1005         // FIXME: move this to InsetNewline::latex
1006         if (inset->lyxCode() == NEWLINE_CODE || inset->lyxCode() == SEPARATOR_CODE) {
1007                 // newlines are handled differently here than
1008                 // the default in simpleTeXSpecialChars().
1009                 if (!style.newline_allowed) {
1010                         os << '\n';
1011                 } else {
1012                         if (open_font) {
1013                                 column += running_font.latexWriteEndChanges(
1014                                         os, bparams, runparams,
1015                                         basefont, basefont);
1016                                 open_font = false;
1017                         }
1018
1019                         if (running_font.fontInfo().family() == TYPEWRITER_FAMILY)
1020                                 os << '~';
1021
1022                         basefont = owner_->getLayoutFont(bparams, outerfont);
1023                         running_font = basefont;
1024
1025                         if (runparams.moving_arg)
1026                                 os << "\\protect ";
1027
1028                 }
1029                 os.texrow().start(owner_->id(), i + 1);
1030                 column = 0;
1031         }
1032
1033         if (owner_->isDeleted(i)) {
1034                 if( ++runparams.inDeletedInset == 1)
1035                         runparams.changeOfDeletedInset = owner_->lookupChange(i);
1036         }
1037
1038         if (inset->canTrackChanges()) {
1039                 column += Changes::latexMarkChange(os, bparams, running_change,
1040                         Change(Change::UNCHANGED), runparams);
1041                 running_change = Change(Change::UNCHANGED);
1042         }
1043
1044         bool close = false;
1045         odocstream::pos_type const len = os.os().tellp();
1046
1047         if (inset->forceLTR()
1048             && !runparams.use_polyglossia
1049             && running_font.isRightToLeft()
1050             // ERT is an exception, it should be output with no
1051             // decorations at all
1052             && inset->lyxCode() != ERT_CODE) {
1053                 if (running_font.language()->lang() == "farsi")
1054                         os << "\\beginL{}";
1055                 else
1056                         os << "\\L{";
1057                 close = true;
1058         }
1059
1060         // FIXME: Bug: we can have an empty font change here!
1061         // if there has just been a font change, we are going to close it
1062         // right now, which means stupid latex code like \textsf{}. AFAIK,
1063         // this does not harm dvi output. A minor bug, thus (JMarc)
1064
1065         // Some insets cannot be inside a font change command.
1066         // However, even such insets *can* be placed in \L or \R
1067         // or their equivalents (for RTL language switches), so we don't
1068         // close the language in those cases.
1069         // ArabTeX, though, cannot handle this special behavior, it seems.
1070         bool arabtex = basefont.language()->lang() == "arabic_arabtex"
1071                 || running_font.language()->lang() == "arabic_arabtex";
1072         if (open_font && !inset->inheritFont()) {
1073                 bool closeLanguage = arabtex
1074                         || basefont.isRightToLeft() == running_font.isRightToLeft();
1075                 unsigned int count = running_font.latexWriteEndChanges(os,
1076                         bparams, runparams, basefont, basefont, closeLanguage);
1077                 column += count;
1078                 // if any font properties were closed, update the running_font,
1079                 // making sure, however, to leave the language as it was
1080                 if (count > 0) {
1081                         // FIXME: probably a better way to keep track of the old
1082                         // language, than copying the entire font?
1083                         Font const copy_font(running_font);
1084                         basefont = owner_->getLayoutFont(bparams, outerfont);
1085                         running_font = basefont;
1086                         if (!closeLanguage)
1087                                 running_font.setLanguage(copy_font.language());
1088                         // leave font open if language is still open
1089                         open_font = (running_font.language() == basefont.language());
1090                         if (closeLanguage)
1091                                 runparams.local_font = &basefont;
1092                 }
1093         }
1094
1095         int prev_rows = os.texrow().rows();
1096
1097         try {
1098                 runparams.lastid = id_;
1099                 runparams.lastpos = i;
1100                 inset->latex(os, runparams);
1101         } catch (EncodingException & e) {
1102                 // add location information and throw again.
1103                 e.par_id = id_;
1104                 e.pos = i;
1105                 throw(e);
1106         }
1107
1108         if (close) {
1109                 if (running_font.language()->lang() == "farsi")
1110                                 os << "\\endL{}";
1111                         else
1112                                 os << '}';
1113         }
1114
1115         if (os.texrow().rows() > prev_rows) {
1116                 os.texrow().start(owner_->id(), i + 1);
1117                 column = 0;
1118         } else {
1119                 column += (unsigned int)(os.os().tellp() - len);
1120         }
1121
1122         if (owner_->isDeleted(i))
1123                 --runparams.inDeletedInset;
1124 }
1125
1126
1127 void Paragraph::Private::latexSpecialChar(otexstream & os,
1128                                           BufferParams const & bparams,
1129                                           OutputParams const & runparams,
1130                                           Font const & running_font,
1131                                           Change const & running_change,
1132                                           Layout const & style,
1133                                           pos_type & i,
1134                                           pos_type end_pos,
1135                                           unsigned int & column)
1136 {
1137         // With polyglossia, brackets and stuff need not be reversed
1138         // in RTL scripts (see bug #8251)
1139         char_type const c = (runparams.use_polyglossia) ?
1140                 owner_->getUChar(bparams, i) : text_[i];
1141
1142         if (style.pass_thru || runparams.pass_thru
1143             || contains(style.pass_thru_chars, c)
1144             || contains(runparams.pass_thru_chars, c)) {
1145                 if (c != '\0') {
1146                         Encoding const * const enc = runparams.encoding;
1147                         if (enc && !enc->encodable(c))
1148                                 throw EncodingException(c);
1149                         os.put(c);
1150                 }
1151                 return;
1152         }
1153
1154         // TIPA uses its own T3 encoding
1155         if (runparams.inIPA && latexSpecialT3(c, os, i, column))
1156                 return;
1157         // If T1 font encoding is used, use the special
1158         // characters it provides.
1159         // NOTE: Some languages reset the font encoding internally.
1160         //       If we are using such a language, we do not output
1161         //       special T1 chars.
1162         if (!runparams.inIPA && !running_font.language()->internalFontEncoding()
1163             && bparams.font_encoding() == "T1" && latexSpecialT1(c, os, i, column))
1164                 return;
1165
1166         // Otherwise, we use what LaTeX provides us.
1167         switch (c) {
1168         case '\\':
1169                 os << "\\textbackslash{}";
1170                 column += 15;
1171                 break;
1172         case '<':
1173                 os << "\\textless{}";
1174                 column += 10;
1175                 break;
1176         case '>':
1177                 os << "\\textgreater{}";
1178                 column += 13;
1179                 break;
1180         case '|':
1181                 os << "\\textbar{}";
1182                 column += 9;
1183                 break;
1184         case '-':
1185                 os << '-';
1186                 if (i + 1 < end_pos && text_[i+1] == '-') {
1187                         // Prevent "--" becoming an endash and "---" becoming
1188                         // an emdash.
1189                         // Within \ttfamily, "--" is merged to "-" (no endash)
1190                         // so we avoid this rather irritating ligature as well
1191                         os << "{}";
1192                         column += 2;
1193                 }
1194                 break;
1195         case '\"':
1196                 os << "\\char`\\\"{}";
1197                 column += 9;
1198                 break;
1199
1200         case '$': case '&':
1201         case '%': case '#': case '{':
1202         case '}': case '_':
1203                 os << '\\';
1204                 os.put(c);
1205                 column += 1;
1206                 break;
1207
1208         case '~':
1209                 os << "\\textasciitilde{}";
1210                 column += 16;
1211                 break;
1212
1213         case '^':
1214                 os << "\\textasciicircum{}";
1215                 column += 17;
1216                 break;
1217
1218         case '*':
1219         case '[':
1220         case ']':
1221                 // avoid being mistaken for optional arguments
1222                 os << '{';
1223                 os.put(c);
1224                 os << '}';
1225                 column += 2;
1226                 break;
1227
1228         case ' ':
1229                 // Blanks are printed before font switching.
1230                 // Sure? I am not! (try nice-latex)
1231                 // I am sure it's correct. LyX might be smarter
1232                 // in the future, but for now, nothing wrong is
1233                 // written. (Asger)
1234                 break;
1235
1236         default:
1237                 if (c == '\0')
1238                         return;
1239
1240                 Encoding const & encoding = *(runparams.encoding);
1241                 char_type next = '\0';
1242                 if (i + 1 < int(text_.size())) {
1243                         next = text_[i + 1];
1244                         if (Encodings::isCombiningChar(next)) {
1245                                 column += latexSurrogatePair(os, c, next, runparams) - 1;
1246                                 ++i;
1247                                 break;
1248                         }
1249                 }
1250                 string script;
1251                 pair<docstring, bool> latex = encoding.latexChar(c);
1252                 docstring nextlatex;
1253                 bool nexttipas = false;
1254                 string nexttipashortcut;
1255                 if (next != '\0' && next != META_INSET && encoding.encodable(next)) {
1256                         nextlatex = encoding.latexChar(next).first;
1257                         if (runparams.inIPA) {
1258                                 nexttipashortcut = Encodings::TIPAShortcut(next);
1259                                 nexttipas = !nexttipashortcut.empty();
1260                         }
1261                 }
1262                 bool tipas = false;
1263                 if (runparams.inIPA) {
1264                         string const tipashortcut = Encodings::TIPAShortcut(c);
1265                         if (!tipashortcut.empty()) {
1266                                 latex.first = from_ascii(tipashortcut);
1267                                 latex.second = false;
1268                                 tipas = true;
1269                         }
1270                 }
1271                 if (Encodings::isKnownScriptChar(c, script)
1272                     && prefixIs(latex.first, from_ascii("\\" + script)))
1273                         column += writeScriptChars(os, latex.first,
1274                                         running_change, encoding, i) - 1;
1275                 else if (latex.second
1276                          && ((!prefixIs(nextlatex, '\\')
1277                                && !prefixIs(nextlatex, '{')
1278                                && !prefixIs(nextlatex, '}'))
1279                              || (nexttipas
1280                                  && !prefixIs(from_ascii(nexttipashortcut), '\\')))
1281                          && !tipas) {
1282                         // Prevent eating of a following
1283                         // space or command corruption by
1284                         // following characters
1285                         if (next == ' ' || next == '\0') {
1286                                 column += latex.first.length() + 1;
1287                                 os << latex.first << "{}";
1288                         } else {
1289                                 column += latex.first.length();
1290                                 os << latex.first << " ";
1291                         }
1292                 } else {
1293                         column += latex.first.length() - 1;
1294                         os << latex.first;
1295                 }
1296                 break;
1297         }
1298 }
1299
1300
1301 bool Paragraph::Private::latexSpecialT1(char_type const c, otexstream & os,
1302         pos_type i, unsigned int & column)
1303 {
1304         switch (c) {
1305         case '>':
1306         case '<':
1307                 os.put(c);
1308                 // In T1 encoding, these characters exist
1309                 // but we should avoid ligatures
1310                 if (i + 1 >= int(text_.size()) || text_[i + 1] != c)
1311                         return true;
1312                 os << "\\textcompwordmark{}";
1313                 column += 19;
1314                 return true;
1315         case '|':
1316                 os.put(c);
1317                 return true;
1318         case '\"':
1319                 // soul.sty breaks with \char`\"
1320                 os << "\\textquotedbl{}";
1321                 column += 14;
1322                 return true;
1323         default:
1324                 return false;
1325         }
1326 }
1327
1328
1329 bool Paragraph::Private::latexSpecialT3(char_type const c, otexstream & os,
1330         pos_type /*i*/, unsigned int & column)
1331 {
1332         switch (c) {
1333         case '*':
1334         case '[':
1335         case ']':
1336         case '\"':
1337                 os.put(c);
1338                 return true;
1339         case '|':
1340                 os << "\\textvertline{}";
1341                 column += 14;
1342                 return true;
1343         default:
1344                 return false;
1345         }
1346 }
1347
1348
1349 void Paragraph::Private::validate(LaTeXFeatures & features) const
1350 {
1351         if (layout_->inpreamble && inset_owner_) {
1352                 bool const is_command = layout_->latextype == LATEX_COMMAND;
1353                 Buffer const & buf = inset_owner_->buffer();
1354                 BufferParams const & bp = features.runparams().is_child
1355                         ? buf.masterParams() : buf.params();
1356                 Font f;
1357                 TexRow texrow;
1358                 // Using a string stream here circumvents the encoding
1359                 // switching machinery of odocstream. Therefore the
1360                 // output is wrong if this paragraph contains content
1361                 // that needs to switch encoding.
1362                 odocstringstream ods;
1363                 otexstream os(ods, texrow);
1364                 if (is_command) {
1365                         os << '\\' << from_ascii(layout_->latexname());
1366                         // we have to provide all the optional arguments here, even though
1367                         // the last one is the only one we care about.
1368                         // Separate handling of optional argument inset.
1369                         if (!layout_->latexargs().empty()) {
1370                                 OutputParams rp = features.runparams();
1371                                 rp.local_font = &owner_->getFirstFontSettings(bp);
1372                                 latexArgInsets(*owner_, os, rp, layout_->latexargs());
1373                         }
1374                         os << from_ascii(layout_->latexparam());
1375                 }
1376                 docstring::size_type const length = ods.str().length();
1377                 // this will output "{" at the beginning, but not at the end
1378                 owner_->latex(bp, f, os, features.runparams(), 0, -1, true);
1379                 if (ods.str().length() > length) {
1380                         if (is_command) {
1381                                 ods << '}';
1382                                 if (!layout_->postcommandargs().empty()) {
1383                                         OutputParams rp = features.runparams();
1384                                         rp.local_font = &owner_->getFirstFontSettings(bp);
1385                                         latexArgInsets(*owner_, os, rp, layout_->postcommandargs(), "post:");
1386                                 }
1387                         }
1388                         string const snippet = to_utf8(ods.str());
1389                         features.addPreambleSnippet(snippet);
1390                 }
1391         }
1392
1393         if (features.runparams().flavor == OutputParams::HTML
1394             && layout_->htmltitle()) {
1395                 features.setHTMLTitle(owner_->asString(AS_STR_INSETS | AS_STR_SKIPDELETE));
1396         }
1397
1398         // check the params.
1399         if (!params_.spacing().isDefault())
1400                 features.require("setspace");
1401
1402         // then the layouts
1403         features.useLayout(layout_->name());
1404
1405         // then the fonts
1406         fontlist_.validate(features);
1407
1408         // then the indentation
1409         if (!params_.leftIndent().zero())
1410                 features.require("ParagraphLeftIndent");
1411
1412         // then the insets
1413         InsetList::const_iterator icit = insetlist_.begin();
1414         InsetList::const_iterator iend = insetlist_.end();
1415         for (; icit != iend; ++icit) {
1416                 if (icit->inset) {
1417                         icit->inset->validate(features);
1418                         if (layout_->needprotect &&
1419                             icit->inset->lyxCode() == FOOT_CODE)
1420                                 features.require("footmisc");
1421                 }
1422         }
1423
1424         // then the contents
1425         for (pos_type i = 0; i < int(text_.size()) ; ++i) {
1426                 BufferEncodings::validate(text_[i], features);
1427         }
1428 }
1429
1430 /////////////////////////////////////////////////////////////////////
1431 //
1432 // Paragraph
1433 //
1434 /////////////////////////////////////////////////////////////////////
1435
1436 namespace {
1437         Layout const emptyParagraphLayout;
1438 }
1439
1440 Paragraph::Paragraph()
1441         : d(new Paragraph::Private(this, emptyParagraphLayout))
1442 {
1443         itemdepth = 0;
1444         d->params_.clear();
1445 }
1446
1447
1448 Paragraph::Paragraph(Paragraph const & par)
1449         : itemdepth(par.itemdepth),
1450         d(new Paragraph::Private(*par.d, this))
1451 {
1452         registerWords();
1453 }
1454
1455
1456 Paragraph::Paragraph(Paragraph const & par, pos_type beg, pos_type end)
1457         : itemdepth(par.itemdepth),
1458         d(new Paragraph::Private(*par.d, this, beg, end))
1459 {
1460         registerWords();
1461 }
1462
1463
1464 Paragraph & Paragraph::operator=(Paragraph const & par)
1465 {
1466         // needed as we will destroy the private part before copying it
1467         if (&par != this) {
1468                 itemdepth = par.itemdepth;
1469
1470                 deregisterWords();
1471                 delete d;
1472                 d = new Private(*par.d, this);
1473                 registerWords();
1474         }
1475         return *this;
1476 }
1477
1478
1479 Paragraph::~Paragraph()
1480 {
1481         deregisterWords();
1482         delete d;
1483 }
1484
1485
1486 namespace {
1487
1488 // this shall be called just before every "os << ..." action.
1489 void flushString(ostream & os, docstring & s)
1490 {
1491         os << to_utf8(s);
1492         s.erase();
1493 }
1494
1495 }
1496
1497
1498 void Paragraph::write(ostream & os, BufferParams const & bparams,
1499         depth_type & dth) const
1500 {
1501         // The beginning or end of a deeper (i.e. nested) area?
1502         if (dth != d->params_.depth()) {
1503                 if (d->params_.depth() > dth) {
1504                         while (d->params_.depth() > dth) {
1505                                 os << "\n\\begin_deeper";
1506                                 ++dth;
1507                         }
1508                 } else {
1509                         while (d->params_.depth() < dth) {
1510                                 os << "\n\\end_deeper";
1511                                 --dth;
1512                         }
1513                 }
1514         }
1515
1516         // First write the layout
1517         os << "\n\\begin_layout " << to_utf8(d->layout_->name()) << '\n';
1518
1519         d->params_.write(os);
1520
1521         Font font1(inherit_font, bparams.language);
1522
1523         Change running_change = Change(Change::UNCHANGED);
1524
1525         // this string is used as a buffer to avoid repetitive calls
1526         // to to_utf8(), which turn out to be expensive (JMarc)
1527         docstring write_buffer;
1528
1529         int column = 0;
1530         for (pos_type i = 0; i <= size(); ++i) {
1531
1532                 Change const & change = lookupChange(i);
1533                 if (change != running_change)
1534                         flushString(os, write_buffer);
1535                 Changes::lyxMarkChange(os, bparams, column, running_change, change);
1536                 running_change = change;
1537
1538                 if (i == size())
1539                         break;
1540
1541                 // Write font changes
1542                 Font font2 = getFontSettings(bparams, i);
1543                 if (font2 != font1) {
1544                         flushString(os, write_buffer);
1545                         font2.lyxWriteChanges(font1, os);
1546                         column = 0;
1547                         font1 = font2;
1548                 }
1549
1550                 char_type const c = d->text_[i];
1551                 switch (c) {
1552                 case META_INSET:
1553                         if (Inset const * inset = getInset(i)) {
1554                                 flushString(os, write_buffer);
1555                                 if (inset->directWrite()) {
1556                                         // international char, let it write
1557                                         // code directly so it's shorter in
1558                                         // the file
1559                                         inset->write(os);
1560                                 } else {
1561                                         if (i)
1562                                                 os << '\n';
1563                                         os << "\\begin_inset ";
1564                                         inset->write(os);
1565                                         os << "\n\\end_inset\n\n";
1566                                         column = 0;
1567                                 }
1568                                 // FIXME This can be removed again once the mystery
1569                                 // crash has been resolved.
1570                                 os << flush;
1571                         }
1572                         break;
1573                 case '\\':
1574                         flushString(os, write_buffer);
1575                         os << "\n\\backslash\n";
1576                         column = 0;
1577                         break;
1578                 case '.':
1579                         flushString(os, write_buffer);
1580                         if (i + 1 < size() && d->text_[i + 1] == ' ') {
1581                                 os << ".\n";
1582                                 column = 0;
1583                         } else
1584                                 os << '.';
1585                         break;
1586                 default:
1587                         if ((column > 70 && c == ' ')
1588                             || column > 79) {
1589                                 flushString(os, write_buffer);
1590                                 os << '\n';
1591                                 column = 0;
1592                         }
1593                         // this check is to amend a bug. LyX sometimes
1594                         // inserts '\0' this could cause problems.
1595                         if (c != '\0')
1596                                 write_buffer.push_back(c);
1597                         else
1598                                 LYXERR0("NUL char in structure.");
1599                         ++column;
1600                         break;
1601                 }
1602         }
1603
1604         flushString(os, write_buffer);
1605         os << "\n\\end_layout\n";
1606         // FIXME This can be removed again once the mystery
1607         // crash has been resolved.
1608         os << flush;
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         d->requestSpellCheck(d->text_.size() - 1);
1635 }
1636
1637
1638 void Paragraph::appendString(docstring const & s, Font const & font,
1639                 Change const & change)
1640 {
1641         pos_type end = s.size();
1642         size_t oldsize = d->text_.size();
1643         size_t newsize = oldsize + end;
1644         size_t capacity = d->text_.capacity();
1645         if (newsize >= capacity)
1646                 d->text_.reserve(max(capacity + 100, newsize));
1647
1648         // when appending characters, no need to update tables
1649         d->text_.append(s);
1650
1651         // FIXME: Optimize this!
1652         for (size_t i = oldsize; i != newsize; ++i) {
1653                 // track change
1654                 d->changes_.insert(change, i);
1655                 d->requestSpellCheck(i);
1656         }
1657         d->fontlist_.set(oldsize, font);
1658         d->fontlist_.set(newsize - 1, font);
1659 }
1660
1661
1662 void Paragraph::insertChar(pos_type pos, char_type c,
1663                            bool trackChanges)
1664 {
1665         d->insertChar(pos, c, Change(trackChanges ?
1666                            Change::INSERTED : Change::UNCHANGED));
1667 }
1668
1669
1670 void Paragraph::insertChar(pos_type pos, char_type c,
1671                            Font const & font, bool trackChanges)
1672 {
1673         d->insertChar(pos, c, Change(trackChanges ?
1674                            Change::INSERTED : Change::UNCHANGED));
1675         setFont(pos, font);
1676 }
1677
1678
1679 void Paragraph::insertChar(pos_type pos, char_type c,
1680                            Font const & font, Change const & change)
1681 {
1682         d->insertChar(pos, c, change);
1683         setFont(pos, font);
1684 }
1685
1686
1687 void Paragraph::resetFonts(Font const & font)
1688 {
1689         d->fontlist_.clear();
1690         d->fontlist_.set(0, font);
1691         d->fontlist_.set(d->text_.size() - 1, font);
1692 }
1693
1694 // Gets uninstantiated font setting at position.
1695 Font const & Paragraph::getFontSettings(BufferParams const & bparams,
1696                                          pos_type pos) const
1697 {
1698         if (pos > size()) {
1699                 LYXERR0("pos: " << pos << " size: " << size());
1700                 LBUFERR(false);
1701         }
1702
1703         FontList::const_iterator cit = d->fontlist_.fontIterator(pos);
1704         if (cit != d->fontlist_.end())
1705                 return cit->font();
1706
1707         if (pos == size() && !empty())
1708                 return getFontSettings(bparams, pos - 1);
1709
1710         // Optimisation: avoid a full font instantiation if there is no
1711         // language change from previous call.
1712         static Font previous_font;
1713         static Language const * previous_lang = 0;
1714         Language const * lang = getParLanguage(bparams);
1715         if (lang != previous_lang) {
1716                 previous_lang = lang;
1717                 previous_font = Font(inherit_font, lang);
1718         }
1719         return previous_font;
1720 }
1721
1722
1723 FontSpan Paragraph::fontSpan(pos_type pos) const
1724 {
1725         LBUFERR(pos < size());
1726
1727         pos_type start = 0;
1728         FontList::const_iterator cit = d->fontlist_.begin();
1729         FontList::const_iterator end = d->fontlist_.end();
1730         for (; cit != end; ++cit) {
1731                 if (cit->pos() >= pos) {
1732                         if (pos >= beginOfBody())
1733                                 return FontSpan(max(start, beginOfBody()),
1734                                                 cit->pos());
1735                         else
1736                                 return FontSpan(start,
1737                                                 min(beginOfBody() - 1,
1738                                                          cit->pos()));
1739                 }
1740                 start = cit->pos() + 1;
1741         }
1742
1743         // This should not happen, but if so, we take no chances.
1744         LYXERR0("Paragraph::fontSpan: position not found in fontinfo table!");
1745         LASSERT(false, return FontSpan(pos, pos));
1746 }
1747
1748
1749 // Gets uninstantiated font setting at position 0
1750 Font const & Paragraph::getFirstFontSettings(BufferParams const & bparams) const
1751 {
1752         if (!empty() && !d->fontlist_.empty())
1753                 return d->fontlist_.begin()->font();
1754
1755         // Optimisation: avoid a full font instantiation if there is no
1756         // language change from previous call.
1757         static Font previous_font;
1758         static Language const * previous_lang = 0;
1759         if (bparams.language != previous_lang) {
1760                 previous_lang = bparams.language;
1761                 previous_font = Font(inherit_font, bparams.language);
1762         }
1763
1764         return previous_font;
1765 }
1766
1767
1768 // Gets the fully instantiated font at a given position in a paragraph
1769 // This is basically the same function as Text::GetFont() in text2.cpp.
1770 // The difference is that this one is used for generating the LaTeX file,
1771 // and thus cosmetic "improvements" are disallowed: This has to deliver
1772 // the true picture of the buffer. (Asger)
1773 Font const Paragraph::getFont(BufferParams const & bparams, pos_type pos,
1774                                  Font const & outerfont) const
1775 {
1776         LBUFERR(pos >= 0);
1777
1778         Font font = getFontSettings(bparams, pos);
1779
1780         pos_type const body_pos = beginOfBody();
1781         FontInfo & fi = font.fontInfo();
1782         if (pos < body_pos)
1783                 fi.realize(d->layout_->labelfont);
1784         else
1785                 fi.realize(d->layout_->font);
1786
1787         fi.realize(outerfont.fontInfo());
1788         fi.realize(bparams.getFont().fontInfo());
1789
1790         return font;
1791 }
1792
1793
1794 Font const Paragraph::getLabelFont
1795         (BufferParams const & bparams, Font const & outerfont) const
1796 {
1797         FontInfo tmpfont = d->layout_->labelfont;
1798         tmpfont.realize(outerfont.fontInfo());
1799         tmpfont.realize(bparams.getFont().fontInfo());
1800         return Font(tmpfont, getParLanguage(bparams));
1801 }
1802
1803
1804 Font const Paragraph::getLayoutFont
1805         (BufferParams const & bparams, Font const & outerfont) const
1806 {
1807         FontInfo tmpfont = d->layout_->font;
1808         tmpfont.realize(outerfont.fontInfo());
1809         tmpfont.realize(bparams.getFont().fontInfo());
1810         return Font(tmpfont, getParLanguage(bparams));
1811 }
1812
1813
1814 /// Returns the height of the highest font in range
1815 FontSize Paragraph::highestFontInRange
1816         (pos_type startpos, pos_type endpos, FontSize def_size) const
1817 {
1818         return d->fontlist_.highestInRange(startpos, endpos, def_size);
1819 }
1820
1821
1822 char_type Paragraph::getUChar(BufferParams const & bparams, pos_type pos) const
1823 {
1824         char_type c = d->text_[pos];
1825         if (!getFontSettings(bparams, pos).isRightToLeft())
1826                 return c;
1827
1828         // FIXME: The arabic special casing is due to the difference of arabic
1829         // round brackets input introduced in r18599. Check if this should be
1830         // unified with Hebrew or at least if all bracket types should be
1831         // handled the same (file format change in either case).
1832         string const & lang = getFontSettings(bparams, pos).language()->lang();
1833         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi"
1834                 || lang == "farsi";
1835         char_type uc = c;
1836         switch (c) {
1837         case '(':
1838                 uc = arabic ? c : ')';
1839                 break;
1840         case ')':
1841                 uc = arabic ? c : '(';
1842                 break;
1843         case '[':
1844                 uc = ']';
1845                 break;
1846         case ']':
1847                 uc = '[';
1848                 break;
1849         case '{':
1850                 uc = '}';
1851                 break;
1852         case '}':
1853                 uc = '{';
1854                 break;
1855         case '<':
1856                 uc = '>';
1857                 break;
1858         case '>':
1859                 uc = '<';
1860                 break;
1861         }
1862
1863         return uc;
1864 }
1865
1866
1867 void Paragraph::setFont(pos_type pos, Font const & font)
1868 {
1869         LASSERT(pos <= size(), return);
1870
1871         // First, reduce font against layout/label font
1872         // Update: The setCharFont() routine in text2.cpp already
1873         // reduces font, so we don't need to do that here. (Asger)
1874
1875         d->fontlist_.set(pos, font);
1876 }
1877
1878
1879 void Paragraph::makeSameLayout(Paragraph const & par)
1880 {
1881         d->layout_ = par.d->layout_;
1882         d->params_ = par.d->params_;
1883 }
1884
1885
1886 bool Paragraph::stripLeadingSpaces(bool trackChanges)
1887 {
1888         if (isFreeSpacing())
1889                 return false;
1890
1891         int pos = 0;
1892         int count = 0;
1893
1894         while (pos < size() && (isNewline(pos) || isLineSeparator(pos))) {
1895                 if (eraseChar(pos, trackChanges))
1896                         ++count;
1897                 else
1898                         ++pos;
1899         }
1900
1901         return count > 0 || pos > 0;
1902 }
1903
1904
1905 bool Paragraph::hasSameLayout(Paragraph const & par) const
1906 {
1907         return par.d->layout_ == d->layout_
1908                 && d->params_.sameLayout(par.d->params_);
1909 }
1910
1911
1912 depth_type Paragraph::getDepth() const
1913 {
1914         return d->params_.depth();
1915 }
1916
1917
1918 depth_type Paragraph::getMaxDepthAfter() const
1919 {
1920         if (d->layout_->isEnvironment())
1921                 return d->params_.depth() + 1;
1922         else
1923                 return d->params_.depth();
1924 }
1925
1926
1927 char Paragraph::getAlign() const
1928 {
1929         if (d->params_.align() == LYX_ALIGN_LAYOUT)
1930                 return d->layout_->align;
1931         else
1932                 return d->params_.align();
1933 }
1934
1935
1936 docstring const & Paragraph::labelString() const
1937 {
1938         return d->params_.labelString();
1939 }
1940
1941
1942 // the next two functions are for the manual labels
1943 docstring const Paragraph::getLabelWidthString() const
1944 {
1945         if (d->layout_->margintype == MARGIN_MANUAL
1946             || d->layout_->latextype == LATEX_BIB_ENVIRONMENT)
1947                 return d->params_.labelWidthString();
1948         else
1949                 return _("Senseless with this layout!");
1950 }
1951
1952
1953 void Paragraph::setLabelWidthString(docstring const & s)
1954 {
1955         d->params_.labelWidthString(s);
1956 }
1957
1958
1959 docstring Paragraph::expandLabel(Layout const & layout,
1960                 BufferParams const & bparams) const
1961 {
1962         return expandParagraphLabel(layout, bparams, true);
1963 }
1964
1965
1966 docstring Paragraph::expandDocBookLabel(Layout const & layout,
1967                 BufferParams const & bparams) const
1968 {
1969         return expandParagraphLabel(layout, bparams, false);
1970 }
1971
1972
1973 docstring Paragraph::expandParagraphLabel(Layout const & layout,
1974                 BufferParams const & bparams, bool process_appendix) const
1975 {
1976         DocumentClass const & tclass = bparams.documentClass();
1977         string const & lang = getParLanguage(bparams)->code();
1978         bool const in_appendix = process_appendix && d->params_.appendix();
1979         docstring fmt = translateIfPossible(layout.labelstring(in_appendix), lang);
1980
1981         if (fmt.empty() && !layout.counter.empty())
1982                 return tclass.counters().theCounter(layout.counter, lang);
1983
1984         // handle 'inherited level parts' in 'fmt',
1985         // i.e. the stuff between '@' in   '@Section@.\arabic{subsection}'
1986         size_t const i = fmt.find('@', 0);
1987         if (i != docstring::npos) {
1988                 size_t const j = fmt.find('@', i + 1);
1989                 if (j != docstring::npos) {
1990                         docstring parent(fmt, i + 1, j - i - 1);
1991                         docstring label = from_ascii("??");
1992                         if (tclass.hasLayout(parent))
1993                                 docstring label = expandParagraphLabel(tclass[parent], bparams,
1994                                                       process_appendix);
1995                         fmt = docstring(fmt, 0, i) + label
1996                                 + docstring(fmt, j + 1, docstring::npos);
1997                 }
1998         }
1999
2000         return tclass.counters().counterLabel(fmt, lang);
2001 }
2002
2003
2004 void Paragraph::applyLayout(Layout const & new_layout)
2005 {
2006         d->layout_ = &new_layout;
2007         LyXAlignment const oldAlign = d->params_.align();
2008
2009         if (!(oldAlign & d->layout_->alignpossible)) {
2010                 frontend::Alert::warning(_("Alignment not permitted"),
2011                         _("The new layout does not permit the alignment previously used.\nSetting to default."));
2012                 d->params_.align(LYX_ALIGN_LAYOUT);
2013         }
2014 }
2015
2016
2017 pos_type Paragraph::beginOfBody() const
2018 {
2019         return d->begin_of_body_;
2020 }
2021
2022
2023 void Paragraph::setBeginOfBody()
2024 {
2025         if (d->layout_->labeltype != LABEL_MANUAL) {
2026                 d->begin_of_body_ = 0;
2027                 return;
2028         }
2029
2030         // Unroll the first two cycles of the loop
2031         // and remember the previous character to
2032         // remove unnecessary getChar() calls
2033         pos_type i = 0;
2034         pos_type end = size();
2035         if (i < end && !(isNewline(i) || isEnvSeparator(i))) {
2036                 ++i;
2037                 char_type previous_char = 0;
2038                 char_type temp = 0;
2039                 if (i < end) {
2040                         previous_char = d->text_[i];
2041                         if (!(isNewline(i) || isEnvSeparator(i))) {
2042                                 ++i;
2043                                 while (i < end && previous_char != ' ') {
2044                                         temp = d->text_[i];
2045                                         if (isNewline(i) || isEnvSeparator(i))
2046                                                 break;
2047                                         ++i;
2048                                         previous_char = temp;
2049                                 }
2050                         }
2051                 }
2052         }
2053
2054         d->begin_of_body_ = i;
2055 }
2056
2057
2058 bool Paragraph::allowParagraphCustomization() const
2059 {
2060         return inInset().allowParagraphCustomization();
2061 }
2062
2063
2064 bool Paragraph::usePlainLayout() const
2065 {
2066         return inInset().usePlainLayout();
2067 }
2068
2069
2070 bool Paragraph::isPassThru() const
2071 {
2072         return inInset().isPassThru() || d->layout_->pass_thru;
2073 }
2074
2075 namespace {
2076
2077 // paragraphs inside floats need different alignment tags to avoid
2078 // unwanted space
2079
2080 bool noTrivlistCentering(InsetCode code)
2081 {
2082         return code == FLOAT_CODE
2083                || code == WRAP_CODE
2084                || code == CELL_CODE;
2085 }
2086
2087
2088 string correction(string const & orig)
2089 {
2090         if (orig == "flushleft")
2091                 return "raggedright";
2092         if (orig == "flushright")
2093                 return "raggedleft";
2094         if (orig == "center")
2095                 return "centering";
2096         return orig;
2097 }
2098
2099
2100 bool corrected_env(otexstream & os, string const & suffix, string const & env,
2101         InsetCode code, bool const lastpar, int & col)
2102 {
2103         string macro = suffix + "{";
2104         if (noTrivlistCentering(code)) {
2105                 if (lastpar) {
2106                         // the last paragraph in non-trivlist-aligned
2107                         // context is special (to avoid unwanted whitespace)
2108                         if (suffix == "\\begin") {
2109                                 macro = "\\" + correction(env) + "{}";
2110                                 os << from_ascii(macro);
2111                                 col += macro.size();
2112                                 return true;
2113                         }
2114                         return false;
2115                 }
2116                 macro += correction(env);
2117         } else
2118                 macro += env;
2119         macro += "}";
2120         if (suffix == "\\par\\end") {
2121                 os << breakln;
2122                 col = 0;
2123         }
2124         os << from_ascii(macro);
2125         col += macro.size();
2126         if (suffix == "\\begin") {
2127                 os << breakln;
2128                 col = 0;
2129         }
2130         return true;
2131 }
2132
2133 } // namespace anon
2134
2135
2136 int Paragraph::Private::startTeXParParams(BufferParams const & bparams,
2137                         otexstream & os, OutputParams const & runparams) const
2138 {
2139         int column = 0;
2140
2141         if (params_.noindent() && !layout_->pass_thru
2142             && (layout_->toggle_indent != ITOGGLE_NEVER)) {
2143                 os << "\\noindent ";
2144                 column += 10;
2145         }
2146
2147         LyXAlignment const curAlign = params_.align();
2148
2149         if (curAlign == layout_->align)
2150                 return column;
2151
2152         switch (curAlign) {
2153         case LYX_ALIGN_NONE:
2154         case LYX_ALIGN_BLOCK:
2155         case LYX_ALIGN_LAYOUT:
2156         case LYX_ALIGN_SPECIAL:
2157         case LYX_ALIGN_DECIMAL:
2158                 break;
2159         case LYX_ALIGN_LEFT:
2160         case LYX_ALIGN_RIGHT:
2161         case LYX_ALIGN_CENTER:
2162                 if (runparams.moving_arg) {
2163                         os << "\\protect";
2164                         column += 8;
2165                 }
2166                 break;
2167         }
2168
2169         string const begin_tag = "\\begin";
2170         InsetCode code = ownerCode();
2171         bool const lastpar = runparams.isLastPar;
2172
2173         switch (curAlign) {
2174         case LYX_ALIGN_NONE:
2175         case LYX_ALIGN_BLOCK:
2176         case LYX_ALIGN_LAYOUT:
2177         case LYX_ALIGN_SPECIAL:
2178         case LYX_ALIGN_DECIMAL:
2179                 break;
2180         case LYX_ALIGN_LEFT: {
2181                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2182                         corrected_env(os, begin_tag, "flushleft", code, lastpar, column);
2183                 else
2184                         corrected_env(os, begin_tag, "flushright", code, lastpar, column);
2185                 break;
2186         } case LYX_ALIGN_RIGHT: {
2187                 string output;
2188                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2189                         corrected_env(os, begin_tag, "flushright", code, lastpar, column);
2190                 else
2191                         corrected_env(os, begin_tag, "flushleft", code, lastpar, column);
2192                 break;
2193         } case LYX_ALIGN_CENTER: {
2194                 corrected_env(os, begin_tag, "center", code, lastpar, column);
2195                 break;
2196         }
2197         }
2198
2199         return column;
2200 }
2201
2202
2203 bool Paragraph::Private::endTeXParParams(BufferParams const & bparams,
2204                         otexstream & os, OutputParams const & runparams) const
2205 {
2206         LyXAlignment const curAlign = params_.align();
2207
2208         if (curAlign == layout_->align)
2209                 return false;
2210
2211         switch (curAlign) {
2212         case LYX_ALIGN_NONE:
2213         case LYX_ALIGN_BLOCK:
2214         case LYX_ALIGN_LAYOUT:
2215         case LYX_ALIGN_SPECIAL:
2216         case LYX_ALIGN_DECIMAL:
2217                 break;
2218         case LYX_ALIGN_LEFT:
2219         case LYX_ALIGN_RIGHT:
2220         case LYX_ALIGN_CENTER:
2221                 if (runparams.moving_arg)
2222                         os << "\\protect";
2223                 break;
2224         }
2225
2226         bool output = false;
2227         int col = 0;
2228         string const end_tag = "\\par\\end";
2229         InsetCode code = ownerCode();
2230         bool const lastpar = runparams.isLastPar;
2231
2232         switch (curAlign) {
2233         case LYX_ALIGN_NONE:
2234         case LYX_ALIGN_BLOCK:
2235         case LYX_ALIGN_LAYOUT:
2236         case LYX_ALIGN_SPECIAL:
2237         case LYX_ALIGN_DECIMAL:
2238                 break;
2239         case LYX_ALIGN_LEFT: {
2240                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2241                         output = corrected_env(os, end_tag, "flushleft", code, lastpar, col);
2242                 else
2243                         output = corrected_env(os, end_tag, "flushright", code, lastpar, col);
2244                 break;
2245         } case LYX_ALIGN_RIGHT: {
2246                 if (owner_->getParLanguage(bparams)->babel() != "hebrew")
2247                         output = corrected_env(os, end_tag, "flushright", code, lastpar, col);
2248                 else
2249                         output = corrected_env(os, end_tag, "flushleft", code, lastpar, col);
2250                 break;
2251         } case LYX_ALIGN_CENTER: {
2252                 corrected_env(os, end_tag, "center", code, lastpar, col);
2253                 break;
2254         }
2255         }
2256
2257         return output || lastpar;
2258 }
2259
2260
2261 // This one spits out the text of the paragraph
2262 void Paragraph::latex(BufferParams const & bparams,
2263         Font const & outerfont,
2264         otexstream & os,
2265         OutputParams const & runparams,
2266         int start_pos, int end_pos, bool force) const
2267 {
2268         LYXERR(Debug::LATEX, "Paragraph::latex...     " << this);
2269
2270         // FIXME This check should not be needed. Perhaps issue an
2271         // error if it triggers.
2272         Layout const & style = inInset().forcePlainLayout() ?
2273                 bparams.documentClass().plainLayout() : *d->layout_;
2274
2275         if (!force && style.inpreamble)
2276                 return;
2277
2278         bool const allowcust = allowParagraphCustomization();
2279
2280         // Current base font for all inherited font changes, without any
2281         // change caused by an individual character, except for the language:
2282         // It is set to the language of the first character.
2283         // As long as we are in the label, this font is the base font of the
2284         // label. Before the first body character it is set to the base font
2285         // of the body.
2286         Font basefont;
2287
2288         // Maybe we have to create a optional argument.
2289         pos_type body_pos = beginOfBody();
2290         unsigned int column = 0;
2291
2292         if (body_pos > 0) {
2293                 // the optional argument is kept in curly brackets in
2294                 // case it contains a ']'
2295                 // This is not strictly needed, but if this is changed it
2296                 // would be a file format change, and tex2lyx would need
2297                 // to be adjusted, since it unconditionally removes the
2298                 // braces when it parses \item.
2299                 os << "[{";
2300                 column += 2;
2301                 basefont = getLabelFont(bparams, outerfont);
2302         } else {
2303                 basefont = getLayoutFont(bparams, outerfont);
2304         }
2305
2306         // Which font is currently active?
2307         Font running_font(basefont);
2308         // Do we have an open font change?
2309         bool open_font = false;
2310
2311         Change runningChange = Change(Change::UNCHANGED);
2312
2313         Encoding const * const prev_encoding = runparams.encoding;
2314
2315         os.texrow().start(id(), 0);
2316
2317         // if the paragraph is empty, the loop will not be entered at all
2318         if (empty()) {
2319                 if (style.isCommand()) {
2320                         os << '{';
2321                         ++column;
2322                 }
2323                 if (!style.leftdelim().empty()) {
2324                         os << style.leftdelim();
2325                         column += style.leftdelim().size();
2326                 }
2327                 if (allowcust)
2328                         column += d->startTeXParParams(bparams, os, runparams);
2329         }
2330
2331         for (pos_type i = 0; i < size(); ++i) {
2332                 // First char in paragraph or after label?
2333                 if (i == body_pos) {
2334                         if (body_pos > 0) {
2335                                 if (open_font) {
2336                                         column += running_font.latexWriteEndChanges(
2337                                                 os, bparams, runparams,
2338                                                 basefont, basefont);
2339                                         open_font = false;
2340                                 }
2341                                 basefont = getLayoutFont(bparams, outerfont);
2342                                 running_font = basefont;
2343
2344                                 column += Changes::latexMarkChange(os, bparams,
2345                                                 runningChange, Change(Change::UNCHANGED),
2346                                                 runparams);
2347                                 runningChange = Change(Change::UNCHANGED);
2348
2349                                 os << "}] ";
2350                                 column +=3;
2351                         }
2352                         if (style.isCommand()) {
2353                                 os << '{';
2354                                 ++column;
2355                         }
2356
2357                         if (!style.leftdelim().empty()) {
2358                                 os << style.leftdelim();
2359                                 column += style.leftdelim().size();
2360                         }
2361
2362                         if (allowcust)
2363                                 column += d->startTeXParParams(bparams, os,
2364                                                             runparams);
2365                 }
2366
2367                 Change const & change = runparams.inDeletedInset
2368                         ? runparams.changeOfDeletedInset : lookupChange(i);
2369
2370                 if (bparams.output_changes && runningChange != change) {
2371                         if (open_font) {
2372                                 column += running_font.latexWriteEndChanges(
2373                                                 os, bparams, runparams, basefont, basefont);
2374                                 open_font = false;
2375                         }
2376                         basefont = getLayoutFont(bparams, outerfont);
2377                         running_font = basefont;
2378
2379                         column += Changes::latexMarkChange(os, bparams, runningChange,
2380                                                            change, runparams);
2381                         runningChange = change;
2382                 }
2383
2384                 // do not output text which is marked deleted
2385                 // if change tracking output is disabled
2386                 if (!bparams.output_changes && change.deleted()) {
2387                         continue;
2388                 }
2389
2390                 ++column;
2391
2392                 // Fully instantiated font
2393                 Font const font = getFont(bparams, i, outerfont);
2394
2395                 Font const last_font = running_font;
2396
2397                 // Do we need to close the previous font?
2398                 if (open_font &&
2399                     (font != running_font ||
2400                      font.language() != running_font.language()))
2401                 {
2402                         column += running_font.latexWriteEndChanges(
2403                                         os, bparams, runparams, basefont,
2404                                         (i == body_pos-1) ? basefont : font);
2405                         running_font = basefont;
2406                         open_font = false;
2407                 }
2408
2409                 string const running_lang = runparams.use_polyglossia ?
2410                         running_font.language()->polyglossia() : running_font.language()->babel();
2411                 // close babel's font environment before opening CJK.
2412                 string const lang_end_command = runparams.use_polyglossia ?
2413                         "\\end{$$lang}" : lyxrc.language_command_end;
2414                 if (!running_lang.empty() &&
2415                     font.language()->encoding()->package() == Encoding::CJK) {
2416                                 string end_tag = subst(lang_end_command,
2417                                                         "$$lang",
2418                                                         running_lang);
2419                                 os << from_ascii(end_tag);
2420                                 column += end_tag.length();
2421                 }
2422
2423                 // Switch file encoding if necessary (and allowed)
2424                 if (!runparams.pass_thru && !style.pass_thru &&
2425                     runparams.encoding->package() != Encoding::none &&
2426                     font.language()->encoding()->package() != Encoding::none) {
2427                         pair<bool, int> const enc_switch =
2428                                 switchEncoding(os.os(), bparams, runparams,
2429                                         *(font.language()->encoding()));
2430                         if (enc_switch.first) {
2431                                 column += enc_switch.second;
2432                                 runparams.encoding = font.language()->encoding();
2433                         }
2434                 }
2435
2436                 char_type const c = d->text_[i];
2437
2438                 // Do we need to change font?
2439                 if ((font != running_font ||
2440                      font.language() != running_font.language()) &&
2441                         i != body_pos - 1)
2442                 {
2443                         odocstringstream ods;
2444                         column += font.latexWriteStartChanges(ods, bparams,
2445                                                               runparams, basefont,
2446                                                               last_font);
2447                         running_font = font;
2448                         open_font = true;
2449                         docstring fontchange = ods.str();
2450                         // check whether the fontchange ends with a \\textcolor
2451                         // modifier and the text starts with a space (bug 4473)
2452                         docstring const last_modifier = rsplit(fontchange, '\\');
2453                         if (prefixIs(last_modifier, from_ascii("textcolor")) && c == ' ')
2454                                 os << fontchange << from_ascii("{}");
2455                         // check if the fontchange ends with a trailing blank
2456                         // (like "\small " (see bug 3382)
2457                         else if (suffixIs(fontchange, ' ') && c == ' ')
2458                                 os << fontchange.substr(0, fontchange.size() - 1)
2459                                    << from_ascii("{}");
2460                         else
2461                                 os << fontchange;
2462                 }
2463
2464                 // FIXME: think about end_pos implementation...
2465                 if (c == ' ' && i >= start_pos && (end_pos == -1 || i < end_pos)) {
2466                         // FIXME: integrate this case in latexSpecialChar
2467                         // Do not print the separation of the optional argument
2468                         // if style.pass_thru is false. This works because
2469                         // latexSpecialChar ignores spaces if
2470                         // style.pass_thru is false.
2471                         if (i != body_pos - 1) {
2472                                 if (d->simpleTeXBlanks(runparams, os,
2473                                                 i, column, font, style)) {
2474                                         // A surrogate pair was output. We
2475                                         // must not call latexSpecialChar
2476                                         // in this iteration, since it would output
2477                                         // the combining character again.
2478                                         ++i;
2479                                         continue;
2480                                 }
2481                         }
2482                 }
2483
2484                 OutputParams rp = runparams;
2485                 rp.free_spacing = style.free_spacing;
2486                 rp.local_font = &font;
2487                 rp.intitle = style.intitle;
2488
2489                 // Two major modes:  LaTeX or plain
2490                 // Handle here those cases common to both modes
2491                 // and then split to handle the two modes separately.
2492                 if (c == META_INSET) {
2493                         if (i >= start_pos && (end_pos == -1 || i < end_pos)) {
2494                                 d->latexInset(bparams, os, rp, running_font,
2495                                                 basefont, outerfont, open_font,
2496                                                 runningChange, style, i, column);
2497                         }
2498                 } else {
2499                         if (i >= start_pos && (end_pos == -1 || i < end_pos)) {
2500                                 try {
2501                                         d->latexSpecialChar(os, bparams, rp, running_font, runningChange,
2502                                                             style, i, end_pos, column);
2503                                 } catch (EncodingException & e) {
2504                                 if (runparams.dryrun) {
2505                                         os << "<" << _("LyX Warning: ")
2506                                            << _("uncodable character") << " '";
2507                                         os.put(c);
2508                                         os << "'>";
2509                                 } else {
2510                                         // add location information and throw again.
2511                                         e.par_id = id();
2512                                         e.pos = i;
2513                                         throw(e);
2514                                 }
2515                         }
2516                 }
2517                 }
2518
2519                 // Set the encoding to that returned from latexSpecialChar (see
2520                 // comment for encoding member in OutputParams.h)
2521                 runparams.encoding = rp.encoding;
2522         }
2523
2524         // If we have an open font definition, we have to close it
2525         if (open_font) {
2526 #ifdef FIXED_LANGUAGE_END_DETECTION
2527                 if (next_) {
2528                         running_font.latexWriteEndChanges(os, bparams,
2529                                         runparams, basefont,
2530                                         next_->getFont(bparams, 0, outerfont));
2531                 } else {
2532                         running_font.latexWriteEndChanges(os, bparams,
2533                                         runparams, basefont, basefont);
2534                 }
2535 #else
2536 //FIXME: For now we ALWAYS have to close the foreign font settings if they are
2537 //FIXME: there as we start another \selectlanguage with the next paragraph if
2538 //FIXME: we are in need of this. This should be fixed sometime (Jug)
2539                 running_font.latexWriteEndChanges(os, bparams, runparams,
2540                                 basefont, basefont);
2541 #endif
2542         }
2543
2544         column += Changes::latexMarkChange(os, bparams, runningChange,
2545                                            Change(Change::UNCHANGED), runparams);
2546
2547         // Needed if there is an optional argument but no contents.
2548         if (body_pos > 0 && body_pos == size()) {
2549                 os << "}]~";
2550         }
2551
2552         if (!style.rightdelim().empty()) {
2553                 os << style.rightdelim();
2554                 column += style.rightdelim().size();
2555         }
2556
2557         if (allowcust && d->endTeXParParams(bparams, os, runparams)
2558             && runparams.encoding != prev_encoding) {
2559                 runparams.encoding = prev_encoding;
2560                 if (!runparams.isFullUnicode())
2561                         os << setEncoding(prev_encoding->iconvName());
2562         }
2563
2564         LYXERR(Debug::LATEX, "Paragraph::latex... done " << this);
2565 }
2566
2567
2568 bool Paragraph::emptyTag() const
2569 {
2570         for (pos_type i = 0; i < size(); ++i) {
2571                 if (Inset const * inset = getInset(i)) {
2572                         InsetCode lyx_code = inset->lyxCode();
2573                         // FIXME testing like that is wrong. What is
2574                         // the intent?
2575                         if (lyx_code != TOC_CODE &&
2576                             lyx_code != INCLUDE_CODE &&
2577                             lyx_code != GRAPHICS_CODE &&
2578                             lyx_code != ERT_CODE &&
2579                             lyx_code != LISTINGS_CODE &&
2580                             lyx_code != FLOAT_CODE &&
2581                             lyx_code != TABULAR_CODE) {
2582                                 return false;
2583                         }
2584                 } else {
2585                         char_type c = d->text_[i];
2586                         if (c != ' ' && c != '\t')
2587                                 return false;
2588                 }
2589         }
2590         return true;
2591 }
2592
2593
2594 string Paragraph::getID(Buffer const & buf, OutputParams const & runparams)
2595         const
2596 {
2597         for (pos_type i = 0; i < size(); ++i) {
2598                 if (Inset const * inset = getInset(i)) {
2599                         InsetCode lyx_code = inset->lyxCode();
2600                         if (lyx_code == LABEL_CODE) {
2601                                 InsetLabel const * const il = static_cast<InsetLabel const *>(inset);
2602                                 docstring const & id = il->getParam("name");
2603                                 return "id='" + to_utf8(sgml::cleanID(buf, runparams, id)) + "'";
2604                         }
2605                 }
2606         }
2607         return string();
2608 }
2609
2610
2611 pos_type Paragraph::firstWordDocBook(odocstream & os, OutputParams const & runparams)
2612         const
2613 {
2614         pos_type i;
2615         for (i = 0; i < size(); ++i) {
2616                 if (Inset const * inset = getInset(i)) {
2617                         inset->docbook(os, runparams);
2618                 } else {
2619                         char_type c = d->text_[i];
2620                         if (c == ' ')
2621                                 break;
2622                         os << sgml::escapeChar(c);
2623                 }
2624         }
2625         return i;
2626 }
2627
2628
2629 pos_type Paragraph::firstWordLyXHTML(XHTMLStream & xs, OutputParams const & runparams)
2630         const
2631 {
2632         pos_type i;
2633         for (i = 0; i < size(); ++i) {
2634                 if (Inset const * inset = getInset(i)) {
2635                         inset->xhtml(xs, runparams);
2636                 } else {
2637                         char_type c = d->text_[i];
2638                         if (c == ' ')
2639                                 break;
2640                         xs << c;
2641                 }
2642         }
2643         return i;
2644 }
2645
2646
2647 bool Paragraph::Private::onlyText(Buffer const & buf, Font const & outerfont, pos_type initial) const
2648 {
2649         Font font_old;
2650         pos_type size = text_.size();
2651         for (pos_type i = initial; i < size; ++i) {
2652                 Font font = owner_->getFont(buf.params(), i, outerfont);
2653                 if (text_[i] == META_INSET)
2654                         return false;
2655                 if (i != initial && font != font_old)
2656                         return false;
2657                 font_old = font;
2658         }
2659
2660         return true;
2661 }
2662
2663
2664 void Paragraph::simpleDocBookOnePar(Buffer const & buf,
2665                                     odocstream & os,
2666                                     OutputParams const & runparams,
2667                                     Font const & outerfont,
2668                                     pos_type initial) const
2669 {
2670         bool emph_flag = false;
2671
2672         Layout const & style = *d->layout_;
2673         FontInfo font_old =
2674                 style.labeltype == LABEL_MANUAL ? style.labelfont : style.font;
2675
2676         if (style.pass_thru && !d->onlyText(buf, outerfont, initial))
2677                 os << "]]>";
2678
2679         // parsing main loop
2680         for (pos_type i = initial; i < size(); ++i) {
2681                 Font font = getFont(buf.params(), i, outerfont);
2682
2683                 // handle <emphasis> tag
2684                 if (font_old.emph() != font.fontInfo().emph()) {
2685                         if (font.fontInfo().emph() == FONT_ON) {
2686                                 os << "<emphasis>";
2687                                 emph_flag = true;
2688                         } else if (i != initial) {
2689                                 os << "</emphasis>";
2690                                 emph_flag = false;
2691                         }
2692                 }
2693
2694                 if (Inset const * inset = getInset(i)) {
2695                         inset->docbook(os, runparams);
2696                 } else {
2697                         char_type c = d->text_[i];
2698
2699                         if (style.pass_thru)
2700                                 os.put(c);
2701                         else
2702                                 os << sgml::escapeChar(c);
2703                 }
2704                 font_old = font.fontInfo();
2705         }
2706
2707         if (emph_flag) {
2708                 os << "</emphasis>";
2709         }
2710
2711         if (style.free_spacing)
2712                 os << '\n';
2713         if (style.pass_thru && !d->onlyText(buf, outerfont, initial))
2714                 os << "<![CDATA[";
2715 }
2716
2717
2718 namespace {
2719 void doFontSwitch(vector<html::FontTag> & tagsToOpen,
2720                   vector<html::EndFontTag> & tagsToClose,
2721                   bool & flag, FontState curstate, html::FontTypes type)
2722 {
2723         if (curstate == FONT_ON) {
2724                 tagsToOpen.push_back(html::FontTag(type));
2725                 flag = true;
2726         } else if (flag) {
2727                 tagsToClose.push_back(html::EndFontTag(type));
2728                 flag = false;
2729         }
2730 }
2731 }
2732
2733
2734 docstring Paragraph::simpleLyXHTMLOnePar(Buffer const & buf,
2735                                     XHTMLStream & xs,
2736                                     OutputParams const & runparams,
2737                                     Font const & outerfont,
2738                                     pos_type initial) const
2739 {
2740         docstring retval;
2741
2742         // track whether we have opened these tags
2743         bool emph_flag = false;
2744         bool bold_flag = false;
2745         bool noun_flag = false;
2746         bool ubar_flag = false;
2747         bool dbar_flag = false;
2748         bool sout_flag = false;
2749         bool wave_flag = false;
2750         // shape tags
2751         bool shap_flag = false;
2752         // family tags
2753         bool faml_flag = false;
2754         // size tags
2755         bool size_flag = false;
2756
2757         Layout const & style = *d->layout_;
2758
2759         xs.startParagraph(allowEmpty());
2760
2761         FontInfo font_old =
2762                 style.labeltype == LABEL_MANUAL ? style.labelfont : style.font;
2763
2764         FontShape  curr_fs   = INHERIT_SHAPE;
2765         FontFamily curr_fam  = INHERIT_FAMILY;
2766         FontSize   curr_size = FONT_SIZE_INHERIT;
2767
2768         string const default_family =
2769                 buf.masterBuffer()->params().fonts_default_family;
2770
2771         vector<html::FontTag> tagsToOpen;
2772         vector<html::EndFontTag> tagsToClose;
2773
2774         // parsing main loop
2775         for (pos_type i = initial; i < size(); ++i) {
2776                 // let's not show deleted material in the output
2777                 if (isDeleted(i))
2778                         continue;
2779
2780                 Font const font = getFont(buf.masterBuffer()->params(), i, outerfont);
2781
2782                 // emphasis
2783                 FontState curstate = font.fontInfo().emph();
2784                 if (font_old.emph() != curstate)
2785                         doFontSwitch(tagsToOpen, tagsToClose, emph_flag, curstate, html::FT_EMPH);
2786
2787                 // noun
2788                 curstate = font.fontInfo().noun();
2789                 if (font_old.noun() != curstate)
2790                         doFontSwitch(tagsToOpen, tagsToClose, noun_flag, curstate, html::FT_NOUN);
2791
2792                 // underbar
2793                 curstate = font.fontInfo().underbar();
2794                 if (font_old.underbar() != curstate)
2795                         doFontSwitch(tagsToOpen, tagsToClose, ubar_flag, curstate, html::FT_UBAR);
2796
2797                 // strikeout
2798                 curstate = font.fontInfo().strikeout();
2799                 if (font_old.strikeout() != curstate)
2800                         doFontSwitch(tagsToOpen, tagsToClose, sout_flag, curstate, html::FT_SOUT);
2801
2802                 // double underbar
2803                 curstate = font.fontInfo().uuline();
2804                 if (font_old.uuline() != curstate)
2805                         doFontSwitch(tagsToOpen, tagsToClose, dbar_flag, curstate, html::FT_DBAR);
2806
2807                 // wavy line
2808                 curstate = font.fontInfo().uwave();
2809                 if (font_old.uwave() != curstate)
2810                         doFontSwitch(tagsToOpen, tagsToClose, wave_flag, curstate, html::FT_WAVE);
2811
2812                 // bold
2813                 // a little hackish, but allows us to reuse what we have.
2814                 curstate = (font.fontInfo().series() == BOLD_SERIES ? FONT_ON : FONT_OFF);
2815                 if (font_old.series() != font.fontInfo().series())
2816                         doFontSwitch(tagsToOpen, tagsToClose, bold_flag, curstate, html::FT_BOLD);
2817
2818                 // Font shape
2819                 curr_fs = font.fontInfo().shape();
2820                 FontShape old_fs = font_old.shape();
2821                 if (old_fs != curr_fs) {
2822                         if (shap_flag) {
2823                                 switch (old_fs) {
2824                                 case ITALIC_SHAPE:
2825                                         tagsToClose.push_back(html::EndFontTag(html::FT_ITALIC));
2826                                         break;
2827                                 case SLANTED_SHAPE:
2828                                         tagsToClose.push_back(html::EndFontTag(html::FT_SLANTED));
2829                                         break;
2830                                 case SMALLCAPS_SHAPE:
2831                                         tagsToClose.push_back(html::EndFontTag(html::FT_SMALLCAPS));
2832                                         break;
2833                                 case UP_SHAPE:
2834                                 case INHERIT_SHAPE:
2835                                         break;
2836                                 default:
2837                                         // the other tags are for internal use
2838                                         LATTEST(false);
2839                                         break;
2840                                 }
2841                                 shap_flag = false;
2842                         }
2843                         switch (curr_fs) {
2844                         case ITALIC_SHAPE:
2845                                 tagsToOpen.push_back(html::FontTag(html::FT_ITALIC));
2846                                 shap_flag = true;
2847                                 break;
2848                         case SLANTED_SHAPE:
2849                                 tagsToOpen.push_back(html::FontTag(html::FT_SLANTED));
2850                                 shap_flag = true;
2851                                 break;
2852                         case SMALLCAPS_SHAPE:
2853                                 tagsToOpen.push_back(html::FontTag(html::FT_SMALLCAPS));
2854                                 shap_flag = true;
2855                                 break;
2856                         case UP_SHAPE:
2857                         case INHERIT_SHAPE:
2858                                 break;
2859                         default:
2860                                 // the other tags are for internal use
2861                                 LATTEST(false);
2862                                 break;
2863                         }
2864                 }
2865
2866                 // Font family
2867                 curr_fam = font.fontInfo().family();
2868                 FontFamily old_fam = font_old.family();
2869                 if (old_fam != curr_fam) {
2870                         if (faml_flag) {
2871                                 switch (old_fam) {
2872                                 case ROMAN_FAMILY:
2873                                         tagsToClose.push_back(html::EndFontTag(html::FT_ROMAN));
2874                                         break;
2875                                 case SANS_FAMILY:
2876                                         tagsToClose.push_back(html::EndFontTag(html::FT_SANS));
2877                                         break;
2878                                 case TYPEWRITER_FAMILY:
2879                                         tagsToClose.push_back(html::EndFontTag(html::FT_TYPE));
2880                                         break;
2881                                 case INHERIT_FAMILY:
2882                                         break;
2883                                 default:
2884                                         // the other tags are for internal use
2885                                         LATTEST(false);
2886                                         break;
2887                                 }
2888                                 faml_flag = false;
2889                         }
2890                         switch (curr_fam) {
2891                         case ROMAN_FAMILY:
2892                                 // we will treat a "default" font family as roman, since we have
2893                                 // no other idea what to do.
2894                                 if (default_family != "rmdefault" && default_family != "default") {
2895                                         tagsToOpen.push_back(html::FontTag(html::FT_ROMAN));
2896                                         faml_flag = true;
2897                                 }
2898                                 break;
2899                         case SANS_FAMILY:
2900                                 if (default_family != "sfdefault") {
2901                                         tagsToOpen.push_back(html::FontTag(html::FT_SANS));
2902                                         faml_flag = true;
2903                                 }
2904                                 break;
2905                         case TYPEWRITER_FAMILY:
2906                                 if (default_family != "ttdefault") {
2907                                         tagsToOpen.push_back(html::FontTag(html::FT_TYPE));
2908                                         faml_flag = true;
2909                                 }
2910                                 break;
2911                         case INHERIT_FAMILY:
2912                                 break;
2913                         default:
2914                                 // the other tags are for internal use
2915                                 LATTEST(false);
2916                                 break;
2917                         }
2918                 }
2919
2920                 // Font size
2921                 curr_size = font.fontInfo().size();
2922                 FontSize old_size = font_old.size();
2923                 if (old_size != curr_size) {
2924                         if (size_flag) {
2925                                 switch (old_size) {
2926                                 case FONT_SIZE_TINY:
2927                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_TINY));
2928                                         break;
2929                                 case FONT_SIZE_SCRIPT:
2930                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_SCRIPT));
2931                                         break;
2932                                 case FONT_SIZE_FOOTNOTE:
2933                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_FOOTNOTE));
2934                                         break;
2935                                 case FONT_SIZE_SMALL:
2936                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_SMALL));
2937                                         break;
2938                                 case FONT_SIZE_LARGE:
2939                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_LARGE));
2940                                         break;
2941                                 case FONT_SIZE_LARGER:
2942                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_LARGER));
2943                                         break;
2944                                 case FONT_SIZE_LARGEST:
2945                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_LARGEST));
2946                                         break;
2947                                 case FONT_SIZE_HUGE:
2948                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_HUGE));
2949                                         break;
2950                                 case FONT_SIZE_HUGER:
2951                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_HUGER));
2952                                         break;
2953                                 case FONT_SIZE_INCREASE:
2954                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_INCREASE));
2955                                         break;
2956                                 case FONT_SIZE_DECREASE:
2957                                         tagsToClose.push_back(html::EndFontTag(html::FT_SIZE_DECREASE));
2958                                         break;
2959                                 case FONT_SIZE_INHERIT:
2960                                 case FONT_SIZE_NORMAL:
2961                                         break;
2962                                 default:
2963                                         // the other tags are for internal use
2964                                         LATTEST(false);
2965                                         break;
2966                                 }
2967                                 size_flag = false;
2968                         }
2969                         switch (curr_size) {
2970                         case FONT_SIZE_TINY:
2971                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_TINY));
2972                                 size_flag = true;
2973                                 break;
2974                         case FONT_SIZE_SCRIPT:
2975                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_SCRIPT));
2976                                 size_flag = true;
2977                                 break;
2978                         case FONT_SIZE_FOOTNOTE:
2979                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_FOOTNOTE));
2980                                 size_flag = true;
2981                                 break;
2982                         case FONT_SIZE_SMALL:
2983                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_SMALL));
2984                                 size_flag = true;
2985                                 break;
2986                         case FONT_SIZE_LARGE:
2987                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_LARGE));
2988                                 size_flag = true;
2989                                 break;
2990                         case FONT_SIZE_LARGER:
2991                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_LARGER));
2992                                 size_flag = true;
2993                                 break;
2994                         case FONT_SIZE_LARGEST:
2995                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_LARGEST));
2996                                 size_flag = true;
2997                                 break;
2998                         case FONT_SIZE_HUGE:
2999                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_HUGE));
3000                                 size_flag = true;
3001                                 break;
3002                         case FONT_SIZE_HUGER:
3003                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_HUGER));
3004                                 size_flag = true;
3005                                 break;
3006                         case FONT_SIZE_INCREASE:
3007                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_INCREASE));
3008                                 size_flag = true;
3009                                 break;
3010                         case FONT_SIZE_DECREASE:
3011                                 tagsToOpen.push_back(html::FontTag(html::FT_SIZE_DECREASE));
3012                                 size_flag = true;
3013                                 break;
3014                         case FONT_SIZE_NORMAL:
3015                         case FONT_SIZE_INHERIT:
3016                                 break;
3017                         default:
3018                                 // the other tags are for internal use
3019                                 LATTEST(false);
3020                                 break;
3021                         }
3022                 }
3023
3024                 // FIXME XHTML
3025                 // Other such tags? What about the other text ranges?
3026
3027                 vector<html::EndFontTag>::const_iterator cit = tagsToClose.begin();
3028                 vector<html::EndFontTag>::const_iterator cen = tagsToClose.end();
3029                 for (; cit != cen; ++cit)
3030                         xs << *cit;
3031
3032                 vector<html::FontTag>::const_iterator sit = tagsToOpen.begin();
3033                 vector<html::FontTag>::const_iterator sen = tagsToOpen.end();
3034                 for (; sit != sen; ++sit)
3035                         xs << *sit;
3036
3037                 tagsToClose.clear();
3038                 tagsToOpen.clear();
3039
3040                 Inset const * inset = getInset(i);
3041                 if (inset) {
3042                         if (!runparams.for_toc || inset->isInToc()) {
3043                                 OutputParams np = runparams;
3044                                 np.local_font = &font;
3045                                 if (!inset->getLayout().htmlisblock())
3046                                         np.html_in_par = true;
3047                                 retval += inset->xhtml(xs, np);
3048                         }
3049                 } else {
3050                         char_type c = getUChar(buf.masterBuffer()->params(), i);
3051                         xs << c;
3052                 }
3053                 font_old = font.fontInfo();
3054         }
3055
3056         xs.closeFontTags();
3057         xs.endParagraph();
3058         return retval;
3059 }
3060
3061
3062 bool Paragraph::isHfill(pos_type pos) const
3063 {
3064         Inset const * inset = getInset(pos);
3065         return inset && inset->isHfill();
3066 }
3067
3068
3069 bool Paragraph::isNewline(pos_type pos) const
3070 {
3071         Inset const * inset = getInset(pos);
3072         return inset && inset->lyxCode() == NEWLINE_CODE;
3073 }
3074
3075
3076 bool Paragraph::isEnvSeparator(pos_type pos) const
3077 {
3078         Inset const * inset = getInset(pos);
3079         return inset && inset->lyxCode() == SEPARATOR_CODE;
3080 }
3081
3082
3083 bool Paragraph::isLineSeparator(pos_type pos) const
3084 {
3085         char_type const c = d->text_[pos];
3086         if (isLineSeparatorChar(c))
3087                 return true;
3088         Inset const * inset = getInset(pos);
3089         return inset && inset->isLineSeparator();
3090 }
3091
3092
3093 bool Paragraph::isWordSeparator(pos_type pos) const
3094 {
3095         if (pos == size())
3096                 return true;
3097         if (Inset const * inset = getInset(pos))
3098                 return !inset->isLetter();
3099         // if we have a hard hyphen (no en- or emdash) or apostrophe
3100         // we pass this to the spell checker
3101         // FIXME: this method is subject to change, visit
3102         // https://bugzilla.mozilla.org/show_bug.cgi?id=355178
3103         // to get an impression how complex this is.
3104         if (isHardHyphenOrApostrophe(pos))
3105                 return false;
3106         char_type const c = d->text_[pos];
3107         // We want to pass the escape chars to the spellchecker
3108         docstring const escape_chars = from_utf8(lyxrc.spellchecker_esc_chars);
3109         return !isLetterChar(c) && !isDigitASCII(c) && !contains(escape_chars, c);
3110 }
3111
3112
3113 bool Paragraph::isHardHyphenOrApostrophe(pos_type pos) const
3114 {
3115         pos_type const psize = size();
3116         if (pos >= psize)
3117                 return false;
3118         char_type const c = d->text_[pos];
3119         if (c != '-' && c != '\'')
3120                 return false;
3121         int nextpos = pos + 1;
3122         int prevpos = pos > 0 ? pos - 1 : 0;
3123         if ((nextpos == psize || isSpace(nextpos))
3124                 && (pos == 0 || isSpace(prevpos)))
3125                 return false;
3126         return true;
3127 }
3128
3129
3130 bool Paragraph::isSameSpellRange(pos_type pos1, pos_type pos2) const
3131 {
3132         return pos1 == pos2
3133                 || d->speller_state_.getRange(pos1) == d->speller_state_.getRange(pos2);
3134 }
3135
3136
3137 bool Paragraph::isChar(pos_type pos) const
3138 {
3139         if (Inset const * inset = getInset(pos))
3140                 return inset->isChar();
3141         char_type const c = d->text_[pos];
3142         return !isLetterChar(c) && !isDigitASCII(c) && !lyx::isSpace(c);
3143 }
3144
3145
3146 bool Paragraph::isSpace(pos_type pos) const
3147 {
3148         if (Inset const * inset = getInset(pos))
3149                 return inset->isSpace();
3150         char_type const c = d->text_[pos];
3151         return lyx::isSpace(c);
3152 }
3153
3154
3155 Language const *
3156 Paragraph::getParLanguage(BufferParams const & bparams) const
3157 {
3158         if (!empty())
3159                 return getFirstFontSettings(bparams).language();
3160         // FIXME: we should check the prev par as well (Lgb)
3161         return bparams.language;
3162 }
3163
3164
3165 bool Paragraph::isRTL(BufferParams const & bparams) const
3166 {
3167         return getParLanguage(bparams)->rightToLeft()
3168                 && !inInset().getLayout().forceLTR();
3169 }
3170
3171
3172 void Paragraph::changeLanguage(BufferParams const & bparams,
3173                                Language const * from, Language const * to)
3174 {
3175         // change language including dummy font change at the end
3176         for (pos_type i = 0; i <= size(); ++i) {
3177                 Font font = getFontSettings(bparams, i);
3178                 if (font.language() == from) {
3179                         font.setLanguage(to);
3180                         setFont(i, font);
3181                         d->requestSpellCheck(i);
3182                 }
3183         }
3184 }
3185
3186
3187 bool Paragraph::isMultiLingual(BufferParams const & bparams) const
3188 {
3189         Language const * doc_language = bparams.language;
3190         FontList::const_iterator cit = d->fontlist_.begin();
3191         FontList::const_iterator end = d->fontlist_.end();
3192
3193         for (; cit != end; ++cit)
3194                 if (cit->font().language() != ignore_language &&
3195                     cit->font().language() != latex_language &&
3196                     cit->font().language() != doc_language)
3197                         return true;
3198         return false;
3199 }
3200
3201
3202 void Paragraph::getLanguages(std::set<Language const *> & languages) const
3203 {
3204         FontList::const_iterator cit = d->fontlist_.begin();
3205         FontList::const_iterator end = d->fontlist_.end();
3206
3207         for (; cit != end; ++cit) {
3208                 Language const * lang = cit->font().language();
3209                 if (lang != ignore_language &&
3210                     lang != latex_language)
3211                         languages.insert(lang);
3212         }
3213 }
3214
3215
3216 docstring Paragraph::asString(int options) const
3217 {
3218         return asString(0, size(), options);
3219 }
3220
3221
3222 docstring Paragraph::asString(pos_type beg, pos_type end, int options, const OutputParams *runparams) const
3223 {
3224         odocstringstream os;
3225
3226         if (beg == 0
3227             && options & AS_STR_LABEL
3228             && !d->params_.labelString().empty())
3229                 os << d->params_.labelString() << ' ';
3230
3231         for (pos_type i = beg; i < end; ++i) {
3232                 if ((options & AS_STR_SKIPDELETE) && isDeleted(i))
3233                         continue;
3234                 char_type const c = d->text_[i];
3235                 if (isPrintable(c) || c == '\t'
3236                     || (c == '\n' && (options & AS_STR_NEWLINES)))
3237                         os.put(c);
3238                 else if (c == META_INSET && (options & AS_STR_INSETS)) {
3239                         if (c == META_INSET && (options & AS_STR_PLAINTEXT)) {
3240                                 LASSERT(runparams != 0, return docstring());
3241                                 getInset(i)->plaintext(os, *runparams);
3242                         } else {
3243                                 getInset(i)->toString(os);
3244                         }
3245                 }
3246         }
3247
3248         return os.str();
3249 }
3250
3251
3252 void Paragraph::forOutliner(docstring & os, size_t maxlen) const
3253 {
3254         if (!d->params_.labelString().empty())
3255                 os += d->params_.labelString() + ' ';
3256         for (pos_type i = 0; i < size() && os.length() < maxlen; ++i) {
3257                 if (isDeleted(i))
3258                         continue;
3259                 char_type const c = d->text_[i];
3260                 if (isPrintable(c))
3261                         os += c;
3262                 else if (c == '\t' || c == '\n')
3263                         os += ' ';
3264                 else if (c == META_INSET)
3265                         getInset(i)->forOutliner(os, maxlen);
3266         }
3267 }
3268
3269
3270 void Paragraph::setInsetOwner(Inset const * inset)
3271 {
3272         d->inset_owner_ = inset;
3273 }
3274
3275
3276 int Paragraph::id() const
3277 {
3278         return d->id_;
3279 }
3280
3281
3282 void Paragraph::setId(int id)
3283 {
3284         d->id_ = id;
3285 }
3286
3287
3288 Layout const & Paragraph::layout() const
3289 {
3290         return *d->layout_;
3291 }
3292
3293
3294 void Paragraph::setLayout(Layout const & layout)
3295 {
3296         d->layout_ = &layout;
3297 }
3298
3299
3300 void Paragraph::setDefaultLayout(DocumentClass const & tc)
3301 {
3302         setLayout(tc.defaultLayout());
3303 }
3304
3305
3306 void Paragraph::setPlainLayout(DocumentClass const & tc)
3307 {
3308         setLayout(tc.plainLayout());
3309 }
3310
3311
3312 void Paragraph::setPlainOrDefaultLayout(DocumentClass const & tclass)
3313 {
3314         if (usePlainLayout())
3315                 setPlainLayout(tclass);
3316         else
3317                 setDefaultLayout(tclass);
3318 }
3319
3320
3321 Inset const & Paragraph::inInset() const
3322 {
3323         LBUFERR(d->inset_owner_);
3324         return *d->inset_owner_;
3325 }
3326
3327
3328 ParagraphParameters & Paragraph::params()
3329 {
3330         return d->params_;
3331 }
3332
3333
3334 ParagraphParameters const & Paragraph::params() const
3335 {
3336         return d->params_;
3337 }
3338
3339
3340 bool Paragraph::isFreeSpacing() const
3341 {
3342         if (d->layout_->free_spacing)
3343                 return true;
3344         return d->inset_owner_ && d->inset_owner_->isFreeSpacing();
3345 }
3346
3347
3348 bool Paragraph::allowEmpty() const
3349 {
3350         if (d->layout_->keepempty)
3351                 return true;
3352         return d->inset_owner_ && d->inset_owner_->allowEmpty();
3353 }
3354
3355
3356 bool Paragraph::brokenBiblio() const
3357 {
3358         // there is a problem if there is no bibitem at position 0 or
3359         // if there is another bibitem in the paragraph.
3360         return d->layout_->labeltype == LABEL_BIBLIO
3361                 && (d->insetlist_.find(BIBITEM_CODE) != 0
3362                     || d->insetlist_.find(BIBITEM_CODE, 1) > 0);
3363 }
3364
3365
3366 int Paragraph::fixBiblio(Buffer const & buffer)
3367 {
3368         // FIXME: What about the case where paragraph is not BIBLIO
3369         // but there is an InsetBibitem?
3370         // FIXME: when there was already an inset at 0, the return value is 1,
3371         // which does not tell whether another inset has been remove; the
3372         // cursor cannot be correctly updated.
3373
3374         if (d->layout_->labeltype != LABEL_BIBLIO)
3375                 return 0;
3376
3377         bool const track_changes = buffer.params().track_changes;
3378         int bibitem_pos = d->insetlist_.find(BIBITEM_CODE);
3379         bool const hasbibitem0 = bibitem_pos == 0;
3380
3381         if (hasbibitem0) {
3382                 bibitem_pos = d->insetlist_.find(BIBITEM_CODE, 1);
3383                 // There was an InsetBibitem at pos 0, and no other one => OK
3384                 if (bibitem_pos == -1)
3385                         return 0;
3386                 // there is a bibitem at the 0 position, but since
3387                 // there is a second one, we copy the second on the
3388                 // first. We're assuming there are at most two of
3389                 // these, which there should be.
3390                 // FIXME: why does it make sense to do that rather
3391                 // than keep the first? (JMarc)
3392                 Inset * inset = releaseInset(bibitem_pos);
3393                 d->insetlist_.begin()->inset = inset;
3394                 return -bibitem_pos;
3395         }
3396
3397         // We need to create an inset at the beginning
3398         Inset * inset = 0;
3399         if (bibitem_pos > 0) {
3400                 // there was one somewhere in the paragraph, let's move it
3401                 inset = d->insetlist_.release(bibitem_pos);
3402                 eraseChar(bibitem_pos, track_changes);
3403         } else
3404                 // make a fresh one
3405                 inset = new InsetBibitem(const_cast<Buffer *>(&buffer),
3406                                          InsetCommandParams(BIBITEM_CODE));
3407
3408         Font font(inherit_font, buffer.params().language);
3409         insertInset(0, inset, font, Change(track_changes ? Change::INSERTED
3410                                                    : Change::UNCHANGED));
3411
3412         return 1;
3413 }
3414
3415
3416 void Paragraph::checkAuthors(AuthorList const & authorList)
3417 {
3418         d->changes_.checkAuthors(authorList);
3419 }
3420
3421
3422 bool Paragraph::isChanged(pos_type pos) const
3423 {
3424         return lookupChange(pos).changed();
3425 }
3426
3427
3428 bool Paragraph::isInserted(pos_type pos) const
3429 {
3430         return lookupChange(pos).inserted();
3431 }
3432
3433
3434 bool Paragraph::isDeleted(pos_type pos) const
3435 {
3436         return lookupChange(pos).deleted();
3437 }
3438
3439
3440 InsetList const & Paragraph::insetList() const
3441 {
3442         return d->insetlist_;
3443 }
3444
3445
3446 void Paragraph::setBuffer(Buffer & b)
3447 {
3448         d->insetlist_.setBuffer(b);
3449 }
3450
3451
3452 Inset * Paragraph::releaseInset(pos_type pos)
3453 {
3454         Inset * inset = d->insetlist_.release(pos);
3455         /// does not honour change tracking!
3456         eraseChar(pos, false);
3457         return inset;
3458 }
3459
3460
3461 Inset * Paragraph::getInset(pos_type pos)
3462 {
3463         return (pos < pos_type(d->text_.size()) && d->text_[pos] == META_INSET)
3464                  ? d->insetlist_.get(pos) : 0;
3465 }
3466
3467
3468 Inset const * Paragraph::getInset(pos_type pos) const
3469 {
3470         return (pos < pos_type(d->text_.size()) && d->text_[pos] == META_INSET)
3471                  ? d->insetlist_.get(pos) : 0;
3472 }
3473
3474
3475 void Paragraph::changeCase(BufferParams const & bparams, pos_type pos,
3476                 pos_type & right, TextCase action)
3477 {
3478         // process sequences of modified characters; in change
3479         // tracking mode, this approach results in much better
3480         // usability than changing case on a char-by-char basis
3481         // We also need to track the current font, since font
3482         // changes within sequences can occur.
3483         vector<pair<char_type, Font> > changes;
3484
3485         bool const trackChanges = bparams.track_changes;
3486
3487         bool capitalize = true;
3488
3489         for (; pos < right; ++pos) {
3490                 char_type oldChar = d->text_[pos];
3491                 char_type newChar = oldChar;
3492
3493                 // ignore insets and don't play with deleted text!
3494                 if (oldChar != META_INSET && !isDeleted(pos)) {
3495                         switch (action) {
3496                                 case text_lowercase:
3497                                         newChar = lowercase(oldChar);
3498                                         break;
3499                                 case text_capitalization:
3500                                         if (capitalize) {
3501                                                 newChar = uppercase(oldChar);
3502                                                 capitalize = false;
3503                                         }
3504                                         break;
3505                                 case text_uppercase:
3506                                         newChar = uppercase(oldChar);
3507                                         break;
3508                         }
3509                 }
3510
3511                 if (isWordSeparator(pos) || isDeleted(pos)) {
3512                         // permit capitalization again
3513                         capitalize = true;
3514                 }
3515
3516                 if (oldChar != newChar) {
3517                         changes.push_back(make_pair(newChar, getFontSettings(bparams, pos)));
3518                         if (pos != right - 1)
3519                                 continue;
3520                         // step behind the changing area
3521                         pos++;
3522                 }
3523
3524                 int erasePos = pos - changes.size();
3525                 for (size_t i = 0; i < changes.size(); i++) {
3526                         insertChar(pos, changes[i].first,
3527                                    changes[i].second,
3528                                    trackChanges);
3529                         if (!eraseChar(erasePos, trackChanges)) {
3530                                 ++erasePos;
3531                                 ++pos; // advance
3532                                 ++right; // expand selection
3533                         }
3534                 }
3535                 changes.clear();
3536         }
3537 }
3538
3539
3540 int Paragraph::find(docstring const & str, bool cs, bool mw,
3541                 pos_type start_pos, bool del) const
3542 {
3543         pos_type pos = start_pos;
3544         int const strsize = str.length();
3545         int i = 0;
3546         pos_type const parsize = d->text_.size();
3547         for (i = 0; i < strsize && pos < parsize; ++i, ++pos) {
3548                 // Ignore "invisible" letters such as ligature breaks
3549                 // and hyphenation chars while searching
3550                 while (pos < parsize - 1 && isInset(pos)) {
3551                         odocstringstream os;
3552                         getInset(pos)->toString(os);
3553                         if (!getInset(pos)->isLetter() || !os.str().empty())
3554                                 break;
3555                         pos++;
3556                 }
3557                 if (cs && str[i] != d->text_[pos])
3558                         break;
3559                 if (!cs && uppercase(str[i]) != uppercase(d->text_[pos]))
3560                         break;
3561                 if (!del && isDeleted(pos))
3562                         break;
3563         }
3564
3565         if (i != strsize)
3566                 return 0;
3567
3568         // if necessary, check whether string matches word
3569         if (mw) {
3570                 if (start_pos > 0 && !isWordSeparator(start_pos - 1))
3571                         return 0;
3572                 if (pos < parsize
3573                         && !isWordSeparator(pos))
3574                         return 0;
3575         }
3576
3577         return pos - start_pos;
3578 }
3579
3580
3581 char_type Paragraph::getChar(pos_type pos) const
3582 {
3583         return d->text_[pos];
3584 }
3585
3586
3587 pos_type Paragraph::size() const
3588 {
3589         return d->text_.size();
3590 }
3591
3592
3593 bool Paragraph::empty() const
3594 {
3595         return d->text_.empty();
3596 }
3597
3598
3599 bool Paragraph::isInset(pos_type pos) const
3600 {
3601         return d->text_[pos] == META_INSET;
3602 }
3603
3604
3605 bool Paragraph::isSeparator(pos_type pos) const
3606 {
3607         //FIXME: Are we sure this can be the only separator?
3608         return d->text_[pos] == ' ';
3609 }
3610
3611
3612 void Paragraph::deregisterWords()
3613 {
3614         Private::LangWordsMap::const_iterator itl = d->words_.begin();
3615         Private::LangWordsMap::const_iterator ite = d->words_.end();
3616         for (; itl != ite; ++itl) {
3617                 WordList * wl = theWordList(itl->first);
3618                 Private::Words::const_iterator it = (itl->second).begin();
3619                 Private::Words::const_iterator et = (itl->second).end();
3620                 for (; it != et; ++it)
3621                         wl->remove(*it);
3622         }
3623         d->words_.clear();
3624 }
3625
3626
3627 void Paragraph::locateWord(pos_type & from, pos_type & to,
3628         word_location const loc) const
3629 {
3630         switch (loc) {
3631         case WHOLE_WORD_STRICT:
3632                 if (from == 0 || from == size()
3633                     || isWordSeparator(from)
3634                     || isWordSeparator(from - 1)) {
3635                         to = from;
3636                         return;
3637                 }
3638                 // no break here, we go to the next
3639
3640         case WHOLE_WORD:
3641                 // If we are already at the beginning of a word, do nothing
3642                 if (!from || isWordSeparator(from - 1))
3643                         break;
3644                 // no break here, we go to the next
3645
3646         case PREVIOUS_WORD:
3647                 // always move the cursor to the beginning of previous word
3648                 while (from && !isWordSeparator(from - 1))
3649                         --from;
3650                 break;
3651         case NEXT_WORD:
3652                 LYXERR0("Paragraph::locateWord: NEXT_WORD not implemented yet");
3653                 break;
3654         case PARTIAL_WORD:
3655                 // no need to move the 'from' cursor
3656                 break;
3657         }
3658         to = from;
3659         while (to < size() && !isWordSeparator(to))
3660                 ++to;
3661 }
3662
3663
3664 void Paragraph::collectWords()
3665 {
3666         for (pos_type pos = 0; pos < size(); ++pos) {
3667                 if (isWordSeparator(pos))
3668                         continue;
3669                 pos_type from = pos;
3670                 locateWord(from, pos, WHOLE_WORD);
3671                 // Work around MSVC warning: The statement
3672                 // if (pos < from + lyxrc.completion_minlength)
3673                 // triggers a signed vs. unsigned warning.
3674                 // I don't know why this happens, it could be a MSVC bug, or
3675                 // related to LLP64 (windows) vs. LP64 (unix) programming
3676                 // model, or the C++ standard might be ambigous in the section
3677                 // defining the "usual arithmetic conversions". However, using
3678                 // a temporary variable is safe and works on all compilers.
3679                 pos_type const endpos = from + lyxrc.completion_minlength;
3680                 if (pos < endpos)
3681                         continue;
3682                 FontList::const_iterator cit = d->fontlist_.fontIterator(from);
3683                 if (cit == d->fontlist_.end())
3684                         return;
3685                 Language const * lang = cit->font().language();
3686                 docstring const word = asString(from, pos, AS_STR_NONE);
3687                 d->words_[lang->lang()].insert(word);
3688         }
3689 }
3690
3691
3692 void Paragraph::registerWords()
3693 {
3694         Private::LangWordsMap::const_iterator itl = d->words_.begin();
3695         Private::LangWordsMap::const_iterator ite = d->words_.end();
3696         for (; itl != ite; ++itl) {
3697                 WordList * wl = theWordList(itl->first);
3698                 Private::Words::const_iterator it = (itl->second).begin();
3699                 Private::Words::const_iterator et = (itl->second).end();
3700                 for (; it != et; ++it)
3701                         wl->insert(*it);
3702         }
3703 }
3704
3705
3706 void Paragraph::updateWords()
3707 {
3708         deregisterWords();
3709         collectWords();
3710         registerWords();
3711 }
3712
3713
3714 void Paragraph::Private::appendSkipPosition(SkipPositions & skips, pos_type const pos) const
3715 {
3716         SkipPositionsIterator begin = skips.begin();
3717         SkipPositions::iterator end = skips.end();
3718         if (pos > 0 && begin < end) {
3719                 --end;
3720                 if (end->last == pos - 1) {
3721                         end->last = pos;
3722                         return;
3723                 }
3724         }
3725         skips.insert(end, FontSpan(pos, pos));
3726 }
3727
3728
3729 Language * Paragraph::Private::locateSpellRange(
3730         pos_type & from, pos_type & to,
3731         SkipPositions & skips) const
3732 {
3733         // skip leading white space
3734         while (from < to && owner_->isWordSeparator(from))
3735                 ++from;
3736         // don't check empty range
3737         if (from >= to)
3738                 return 0;
3739         // get current language
3740         Language * lang = getSpellLanguage(from);
3741         pos_type last = from;
3742         bool samelang = true;
3743         bool sameinset = true;
3744         while (last < to && samelang && sameinset) {
3745                 // hop to end of word
3746                 while (last < to && !owner_->isWordSeparator(last)) {
3747                         if (owner_->getInset(last)) {
3748                                 appendSkipPosition(skips, last);
3749                         } else if (owner_->isDeleted(last)) {
3750                                 appendSkipPosition(skips, last);
3751                         }
3752                         ++last;
3753                 }
3754                 // hop to next word while checking for insets
3755                 while (sameinset && last < to && owner_->isWordSeparator(last)) {
3756                         if (Inset const * inset = owner_->getInset(last))
3757                                 sameinset = inset->isChar() && inset->isLetter();
3758                         if (sameinset && owner_->isDeleted(last)) {
3759                                 appendSkipPosition(skips, last);
3760                         }
3761                         if (sameinset)
3762                                 last++;
3763                 }
3764                 if (sameinset && last < to) {
3765                         // now check for language change
3766                         samelang = lang == getSpellLanguage(last);
3767                 }
3768         }
3769         // if language change detected backstep is needed
3770         if (!samelang)
3771                 --last;
3772         to = last;
3773         return lang;
3774 }
3775
3776
3777 Language * Paragraph::Private::getSpellLanguage(pos_type const from) const
3778 {
3779         Language * lang =
3780                 const_cast<Language *>(owner_->getFontSettings(
3781                         inset_owner_->buffer().params(), from).language());
3782         if (lang == inset_owner_->buffer().params().language
3783                 && !lyxrc.spellchecker_alt_lang.empty()) {
3784                 string lang_code;
3785                 string const lang_variety =
3786                         split(lyxrc.spellchecker_alt_lang, lang_code, '-');
3787                 lang->setCode(lang_code);
3788                 lang->setVariety(lang_variety);
3789         }
3790         return lang;
3791 }
3792
3793
3794 void Paragraph::requestSpellCheck(pos_type pos)
3795 {
3796         d->requestSpellCheck(pos);
3797 }
3798
3799
3800 bool Paragraph::needsSpellCheck() const
3801 {
3802         SpellChecker::ChangeNumber speller_change_number = 0;
3803         if (theSpellChecker())
3804                 speller_change_number = theSpellChecker()->changeNumber();
3805         if (speller_change_number > d->speller_state_.currentChangeNumber()) {
3806                 d->speller_state_.needsCompleteRefresh(speller_change_number);
3807         }
3808         return d->needsSpellCheck();
3809 }
3810
3811
3812 bool Paragraph::Private::ignoreWord(docstring const & word) const
3813 {
3814         // Ignore words with digits
3815         // FIXME: make this customizable
3816         // (note that some checkers ignore words with digits by default)
3817         docstring::const_iterator cit = word.begin();
3818         docstring::const_iterator const end = word.end();
3819         for (; cit != end; ++cit) {
3820                 if (isNumber((*cit)))
3821                         return true;
3822         }
3823         return false;
3824 }
3825
3826
3827 SpellChecker::Result Paragraph::spellCheck(pos_type & from, pos_type & to,
3828         WordLangTuple & wl, docstring_list & suggestions,
3829         bool do_suggestion, bool check_learned) const
3830 {
3831         SpellChecker::Result result = SpellChecker::WORD_OK;
3832         SpellChecker * speller = theSpellChecker();
3833         if (!speller)
3834                 return result;
3835
3836         if (!d->layout_->spellcheck || !inInset().allowSpellCheck())
3837                 return result;
3838
3839         locateWord(from, to, WHOLE_WORD);
3840         if (from == to || from >= size())
3841                 return result;
3842
3843         docstring word = asString(from, to, AS_STR_INSETS | AS_STR_SKIPDELETE);
3844         Language * lang = d->getSpellLanguage(from);
3845
3846         wl = WordLangTuple(word, lang);
3847
3848         if (word.empty())
3849                 return result;
3850
3851         if (needsSpellCheck() || check_learned) {
3852                 pos_type end = to;
3853                 if (!d->ignoreWord(word)) {
3854                         bool const trailing_dot = to < size() && d->text_[to] == '.';
3855                         result = speller->check(wl);
3856                         if (SpellChecker::misspelled(result) && trailing_dot) {
3857                                 wl = WordLangTuple(word.append(from_ascii(".")), lang);
3858                                 result = speller->check(wl);
3859                                 if (!SpellChecker::misspelled(result)) {
3860                                         LYXERR(Debug::GUI, "misspelled word is correct with dot: \"" <<
3861                                            word << "\" [" <<
3862                                            from << ".." << to << "]");
3863                                 } else {
3864                                         // spell check with dot appended failed too
3865                                         // restore original word/lang value
3866                                         word = asString(from, to, AS_STR_INSETS | AS_STR_SKIPDELETE);
3867                                         wl = WordLangTuple(word, lang);
3868                                 }
3869                         }
3870                 }
3871                 if (!SpellChecker::misspelled(result)) {
3872                         // area up to the begin of the next word is not misspelled
3873                         while (end < size() && isWordSeparator(end))
3874                                 ++end;
3875                 }
3876                 d->setMisspelled(from, end, result);
3877         } else {
3878                 result = d->speller_state_.getState(from);
3879         }
3880
3881         if (do_suggestion)
3882                 suggestions.clear();
3883
3884         if (SpellChecker::misspelled(result)) {
3885                 LYXERR(Debug::GUI, "misspelled word: \"" <<
3886                            word << "\" [" <<
3887                            from << ".." << to << "]");
3888                 if (do_suggestion)
3889                         speller->suggest(wl, suggestions);
3890         }
3891         return result;
3892 }
3893
3894
3895 void Paragraph::Private::markMisspelledWords(
3896         pos_type const & first, pos_type const & last,
3897         SpellChecker::Result result,
3898         docstring const & word,
3899         SkipPositions const & skips)
3900 {
3901         if (!SpellChecker::misspelled(result)) {
3902                 setMisspelled(first, last, SpellChecker::WORD_OK);
3903                 return;
3904         }
3905         int snext = first;
3906         SpellChecker * speller = theSpellChecker();
3907         // locate and enumerate the error positions
3908         int nerrors = speller->numMisspelledWords();
3909         int numskipped = 0;
3910         SkipPositionsIterator it = skips.begin();
3911         SkipPositionsIterator et = skips.end();
3912         for (int index = 0; index < nerrors; ++index) {
3913                 int wstart;
3914                 int wlen = 0;
3915                 speller->misspelledWord(index, wstart, wlen);
3916                 /// should not happen if speller supports range checks
3917                 if (!wlen) continue;
3918                 docstring const misspelled = word.substr(wstart, wlen);
3919                 wstart += first + numskipped;
3920                 if (snext < wstart) {
3921                         /// mark the range of correct spelling
3922                         numskipped += countSkips(it, et, wstart);
3923                         setMisspelled(snext,
3924                                 wstart - 1, SpellChecker::WORD_OK);
3925                 }
3926                 snext = wstart + wlen;
3927                 numskipped += countSkips(it, et, snext);
3928                 /// mark the range of misspelling
3929                 setMisspelled(wstart, snext, result);
3930                 LYXERR(Debug::GUI, "misspelled word: \"" <<
3931                            misspelled << "\" [" <<
3932                            wstart << ".." << (snext-1) << "]");
3933                 ++snext;
3934         }
3935         if (snext <= last) {
3936                 /// mark the range of correct spelling at end
3937                 setMisspelled(snext, last, SpellChecker::WORD_OK);
3938         }
3939 }
3940
3941
3942 void Paragraph::spellCheck() const
3943 {
3944         SpellChecker * speller = theSpellChecker();
3945         if (!speller || empty() ||!needsSpellCheck())
3946                 return;
3947         pos_type start;
3948         pos_type endpos;
3949         d->rangeOfSpellCheck(start, endpos);
3950         if (speller->canCheckParagraph()) {
3951                 // loop until we leave the range
3952                 for (pos_type first = start; first < endpos; ) {
3953                         pos_type last = endpos;
3954                         Private::SkipPositions skips;
3955                         Language * lang = d->locateSpellRange(first, last, skips);
3956                         if (first >= endpos)
3957                                 break;
3958                         // start the spell checker on the unit of meaning
3959                         docstring word = asString(first, last, AS_STR_INSETS + AS_STR_SKIPDELETE);
3960                         WordLangTuple wl = WordLangTuple(word, lang);
3961                         SpellChecker::Result result = word.size() ?
3962                                 speller->check(wl) : SpellChecker::WORD_OK;
3963                         d->markMisspelledWords(first, last, result, word, skips);
3964                         first = ++last;
3965                 }
3966         } else {
3967                 static docstring_list suggestions;
3968                 pos_type to = endpos;
3969                 while (start < endpos) {
3970                         WordLangTuple wl;
3971                         spellCheck(start, to, wl, suggestions, false);
3972                         start = to + 1;
3973                 }
3974         }
3975         d->readySpellCheck();
3976 }
3977
3978
3979 bool Paragraph::isMisspelled(pos_type pos, bool check_boundary) const
3980 {
3981         bool result = SpellChecker::misspelled(d->speller_state_.getState(pos));
3982         if (result || pos <= 0 || pos > size())
3983                 return result;
3984         if (check_boundary && (pos == size() || isWordSeparator(pos)))
3985                 result = SpellChecker::misspelled(d->speller_state_.getState(pos - 1));
3986         return result;
3987 }
3988
3989
3990 string Paragraph::magicLabel() const
3991 {
3992         stringstream ss;
3993         ss << "magicparlabel-" << id();
3994         return ss.str();
3995 }
3996
3997
3998 } // namespace lyx