src/Text.cpp

   1 /**
   2  * \file src/Text.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 Dov Feldstern
   9  * \author Jean-Marc Lasgouttes
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Stefan Schimanski
  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 "Text.h"
  22
  23 #include "Author.h"
  24 #include "Buffer.h"
  25 #include "buffer_funcs.h"
  26 #include "BufferParams.h"
  27 #include "BufferView.h"
  28 #include "Changes.h"
  29 #include "CompletionList.h"
  30 #include "Cursor.h"
  31 #include "CutAndPaste.h"
  32 #include "DispatchResult.h"
  33 #include "Encoding.h"
  34 #include "ErrorList.h"
  35 #include "FuncRequest.h"
  36 #include "factory.h"
  37 #include "InsetList.h"
  38 #include "Language.h"
  39 #include "Layout.h"
  40 #include "Length.h"
  41 #include "Lexer.h"
  42 #include "lyxfind.h"
  43 #include "LyXRC.h"
  44 #include "Paragraph.h"
  45 #include "ParagraphParameters.h"
  46 #include "ParIterator.h"
  47 #include "TextClass.h"
  48 #include "TextMetrics.h"
  49 #include "WordLangTuple.h"
  50 #include "WordList.h"
  51
  52 #include "insets/InsetText.h"
  53 #include "insets/InsetBibitem.h"
  54 #include "insets/InsetCaption.h"
  55 #include "insets/InsetNewline.h"
  56 #include "insets/InsetNewpage.h"
  57 #include "insets/InsetArgument.h"
  58 #include "insets/InsetSpace.h"
  59 #include "insets/InsetSpecialChar.h"
  60 #include "insets/InsetTabular.h"
  61
  62 #include "support/debug.h"
  63 #include "support/docstream.h"
  64 #include "support/gettext.h"
  65 #include "support/lassert.h"
  66 #include "support/lstrings.h"
  67 #include "support/textutils.h"
  68
  69 #include <boost/next_prior.hpp>
  70
  71 #include <limits>
  72 #include <sstream>
  73
  74
  75 // TODO: replace if in Text::readParToken() with compile time switch
  76 #if 0
  77
  78 #include "support/metahash.h"
  79
  80 typedef boost::mpl::string<'\\end','_lay','out'> end_layout;
  81 typedef boost::mpl::string<'\\end','in','set'>   end_inset;
  82
  83 void foo()
  84 {
  85         std::string token = "\\end_layout";
  86
  87         switch (boost::hash_value(token)) {
  88                 case lyx::support::hash_string<end_layout>::value:
  89                         return;
  90                 case lyx::support::hash_string<end_inset>::value:
  91                         return;
  92                 default: ;
  93         };
  94
  95 }
  96 #endif
  97
  98
  99 using namespace std;
 100 using namespace lyx::support;
 101
 102 namespace lyx {
 103
 104 using cap::cutSelection;
 105 using cap::pasteParagraphList;
 106
 107 static bool moveItem(Paragraph & fromPar, pos_type fromPos,
 108         Paragraph & toPar, pos_type toPos, BufferParams const & params)
 109 {
 110         // Note: moveItem() does not honour change tracking!
 111         // Therefore, it should only be used for breaking and merging paragraphs
 112
 113         // We need a copy here because the character at fromPos is going to be erased.
 114         Font const tmpFont = fromPar.getFontSettings(params, fromPos);
 115         Change const tmpChange = fromPar.lookupChange(fromPos);
 116
 117         if (Inset * tmpInset = fromPar.getInset(fromPos)) {
 118                 fromPar.releaseInset(fromPos);
 119                 // The inset is not in fromPar any more.
 120                 if (!toPar.insertInset(toPos, tmpInset, tmpFont, tmpChange)) {
 121                         delete tmpInset;
 122                         return false;
 123                 }
 124                 return true;
 125         }
 126
 127         char_type const tmpChar = fromPar.getChar(fromPos);
 128         fromPar.eraseChar(fromPos, false);
 129         toPar.insertChar(toPos, tmpChar, tmpFont, tmpChange);
 130         return true;
 131 }
 132
 133
 134 void breakParagraphConservative(BufferParams const & bparams,
 135         ParagraphList & pars, pit_type par_offset, pos_type pos)
 136 {
 137         // create a new paragraph
 138         Paragraph & tmp = *pars.insert(boost::next(pars.begin(), par_offset + 1),
 139                                        Paragraph());
 140         Paragraph & par = pars[par_offset];
 141
 142         tmp.setInsetOwner(&par.inInset());
 143         tmp.makeSameLayout(par);
 144
 145         LASSERT(pos <= par.size(), /**/);
 146
 147         if (pos < par.size()) {
 148                 // move everything behind the break position to the new paragraph
 149                 pos_type pos_end = par.size() - 1;
 150
 151                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 152                         if (moveItem(par, pos, tmp, j, bparams)) {
 153                                 ++j;
 154                         }
 155                 }
 156                 // Move over the end-of-par change information
 157                 tmp.setChange(tmp.size(), par.lookupChange(par.size()));
 158                 par.setChange(par.size(), Change(bparams.trackChanges ?
 159                                            Change::INSERTED : Change::UNCHANGED));
 160         }
 161 }
 162
 163
 164 void mergeParagraph(BufferParams const & bparams,
 165         ParagraphList & pars, pit_type par_offset)
 166 {
 167         Paragraph & next = pars[par_offset + 1];
 168         Paragraph & par = pars[par_offset];
 169
 170         pos_type pos_end = next.size() - 1;
 171         pos_type pos_insert = par.size();
 172
 173         // the imaginary end-of-paragraph character (at par.size()) has to be
 174         // marked as unmodified. Otherwise, its change is adopted by the first
 175         // character of the next paragraph.
 176         if (par.isChanged(par.size())) {
 177                 LYXERR(Debug::CHANGES,
 178                    "merging par with inserted/deleted end-of-par character");
 179                 par.setChange(par.size(), Change(Change::UNCHANGED));
 180         }
 181
 182         Change change = next.lookupChange(next.size());
 183
 184         // move the content of the second paragraph to the end of the first one
 185         for (pos_type i = 0, j = pos_insert; i <= pos_end; ++i) {
 186                 if (moveItem(next, 0, par, j, bparams)) {
 187                         ++j;
 188                 }
 189         }
 190
 191         // move the change of the end-of-paragraph character
 192         par.setChange(par.size(), change);
 193
 194         pars.erase(boost::next(pars.begin(), par_offset + 1));
 195 }
 196
 197
 198 Text::Text(InsetText * owner, bool use_default_layout)
 199         : owner_(owner), autoBreakRows_(false), undo_counter_(0)
 200 {
 201         pars_.push_back(Paragraph());
 202         Paragraph & par = pars_.back();
 203         par.setInsetOwner(owner);
 204         DocumentClass const & dc = owner->buffer().params().documentClass();
 205         if (use_default_layout)
 206                 par.setDefaultLayout(dc);
 207         else
 208                 par.setPlainLayout(dc);
 209 }
 210
 211
 212 Text::Text(InsetText * owner, Text const & text)
 213         : owner_(owner), autoBreakRows_(text.autoBreakRows_), undo_counter_(0)
 214 {
 215         pars_ = text.pars_;
 216         ParagraphList::iterator const end = pars_.end();
 217         ParagraphList::iterator it = pars_.begin();
 218         for (; it != end; ++it)
 219                 it->setInsetOwner(owner);
 220 }
 221
 222
 223 pit_type Text::depthHook(pit_type pit, depth_type depth) const
 224 {
 225         pit_type newpit = pit;
 226
 227         if (newpit != 0)
 228                 --newpit;
 229
 230         while (newpit != 0 && pars_[newpit].getDepth() > depth)
 231                 --newpit;
 232
 233         if (pars_[newpit].getDepth() > depth)
 234                 return pit;
 235
 236         return newpit;
 237 }
 238
 239
 240 pit_type Text::outerHook(pit_type par_offset) const
 241 {
 242         Paragraph const & par = pars_[par_offset];
 243
 244         if (par.getDepth() == 0)
 245                 return pars_.size();
 246         return depthHook(par_offset, depth_type(par.getDepth() - 1));
 247 }
 248
 249
 250 bool Text::isFirstInSequence(pit_type par_offset) const
 251 {
 252         Paragraph const & par = pars_[par_offset];
 253
 254         pit_type dhook_offset = depthHook(par_offset, par.getDepth());
 255
 256         if (dhook_offset == par_offset)
 257                 return true;
 258
 259         Paragraph const & dhook = pars_[dhook_offset];
 260
 261         return dhook.layout() != par.layout()
 262                 || dhook.getDepth() != par.getDepth();
 263 }
 264
 265
 266 Font const Text::outerFont(pit_type par_offset) const
 267 {
 268         depth_type par_depth = pars_[par_offset].getDepth();
 269         FontInfo tmpfont = inherit_font;
 270         depth_type prev_par_depth = 0;
 271         // Resolve against environment font information
 272         while (par_offset != pit_type(pars_.size())
 273                && par_depth != prev_par_depth
 274                && par_depth
 275                && !tmpfont.resolved()) {
 276                 prev_par_depth = par_depth;
 277                 par_offset = outerHook(par_offset);
 278                 if (par_offset != pit_type(pars_.size())) {
 279                         tmpfont.realize(pars_[par_offset].layout().font);
 280                         par_depth = pars_[par_offset].getDepth();
 281                 }
 282         }
 283
 284         return Font(tmpfont);
 285 }
 286
 287
 288 static void acceptOrRejectChanges(ParagraphList & pars,
 289         BufferParams const & bparams, Text::ChangeOp op)
 290 {
 291         pit_type pars_size = static_cast<pit_type>(pars.size());
 292
 293         // first, accept or reject changes within each individual
 294         // paragraph (do not consider end-of-par)
 295         for (pit_type pit = 0; pit < pars_size; ++pit) {
 296                 // prevent assertion failure
 297                 if (!pars[pit].empty()) {
 298                         if (op == Text::ACCEPT)
 299                                 pars[pit].acceptChanges(0, pars[pit].size());
 300                         else
 301                                 pars[pit].rejectChanges(0, pars[pit].size());
 302                 }
 303         }
 304
 305         // next, accept or reject imaginary end-of-par characters
 306         for (pit_type pit = 0; pit < pars_size; ++pit) {
 307                 pos_type pos = pars[pit].size();
 308                 if (pars[pit].isChanged(pos)) {
 309                         // keep the end-of-par char if it is inserted and accepted
 310                         // or when it is deleted and rejected.
 311                         if (pars[pit].isInserted(pos) == (op == Text::ACCEPT)) {
 312                                 pars[pit].setChange(pos, Change(Change::UNCHANGED));
 313                         } else {
 314                                 if (pit == pars_size - 1) {
 315                                         // we cannot remove a par break at the end of the last
 316                                         // paragraph; instead, we mark it unchanged
 317                                         pars[pit].setChange(pos, Change(Change::UNCHANGED));
 318                                 } else {
 319                                         mergeParagraph(bparams, pars, pit);
 320                                         --pit;
 321                                         --pars_size;
 322                                 }
 323                         }
 324                 }
 325         }
 326 }
 327
 328
 329 void acceptChanges(ParagraphList & pars, BufferParams const & bparams)
 330 {
 331         acceptOrRejectChanges(pars, bparams, Text::ACCEPT);
 332 }
 333
 334
 335 void rejectChanges(ParagraphList & pars, BufferParams const & bparams)
 336 {
 337         acceptOrRejectChanges(pars, bparams, Text::REJECT);
 338 }
 339
 340
 341 InsetText const & Text::inset() const
 342 {
 343         return *owner_;
 344 }
 345
 346
 347
 348 void Text::readParToken(Paragraph & par, Lexer & lex,
 349         string const & token, Font & font, Change & change, ErrorList & errorList)
 350 {
 351         Buffer * buf = const_cast<Buffer *>(&owner_->buffer());
 352         BufferParams const & bp = buf->params();
 353
 354         if (token[0] != '\\') {
 355                 docstring dstr = lex.getDocString();
 356                 par.appendString(dstr, font, change);
 357
 358         } else if (token == "\\begin_layout") {
 359                 lex.eatLine();
 360                 docstring layoutname = lex.getDocString();
 361
 362                 font = Font(inherit_font, bp.language);
 363                 change = Change(Change::UNCHANGED);
 364
 365                 DocumentClass const & tclass = bp.documentClass();
 366
 367                 if (layoutname.empty())
 368                         layoutname = tclass.defaultLayoutName();
 369
 370                 if (owner_->forcePlainLayout()) {
 371                         // in this case only the empty layout is allowed
 372                         layoutname = tclass.plainLayoutName();
 373                 } else if (par.usePlainLayout()) {
 374                         // in this case, default layout maps to empty layout
 375                         if (layoutname == tclass.defaultLayoutName())
 376                                 layoutname = tclass.plainLayoutName();
 377                 } else {
 378                         // otherwise, the empty layout maps to the default
 379                         if (layoutname == tclass.plainLayoutName())
 380                                 layoutname = tclass.defaultLayoutName();
 381                 }
 382
 383                 // When we apply an unknown layout to a document, we add this layout to the textclass
 384                 // of this document. For example, when you apply class article to a beamer document,
 385                 // all unknown layouts such as frame will be added to document class article so that
 386                 // these layouts can keep their original names.
 387                 bool const added_one = tclass.addLayoutIfNeeded(layoutname);
 388                 if (added_one) {
 389                         // Warn the user.
 390                         docstring const s = bformat(_("Layout `%1$s' was not found."), layoutname);
 391                         errorList.push_back(
 392                                 ErrorItem(_("Layout Not Found"), s, par.id(), 0, par.size()));
 393                 }
 394
 395                 par.setLayout(bp.documentClass()[layoutname]);
 396
 397                 // Test whether the layout is obsolete.
 398                 Layout const & layout = par.layout();
 399                 if (!layout.obsoleted_by().empty())
 400                         par.setLayout(bp.documentClass()[layout.obsoleted_by()]);
 401
 402                 par.params().read(lex);
 403
 404         } else if (token == "\\end_layout") {
 405                 LYXERR0("Solitary \\end_layout in line " << lex.lineNumber() << "\n"
 406                        << "Missing \\begin_layout ?");
 407         } else if (token == "\\end_inset") {
 408                 LYXERR0("Solitary \\end_inset in line " << lex.lineNumber() << "\n"
 409                        << "Missing \\begin_inset ?");
 410         } else if (token == "\\begin_inset") {
 411                 Inset * inset = readInset(lex, buf);
 412                 if (inset)
 413                         par.insertInset(par.size(), inset, font, change);
 414                 else {
 415                         lex.eatLine();
 416                         docstring line = lex.getDocString();
 417                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 418                                             par.id(), 0, par.size()));
 419                 }
 420         } else if (token == "\\family") {
 421                 lex.next();
 422                 setLyXFamily(lex.getString(), font.fontInfo());
 423         } else if (token == "\\series") {
 424                 lex.next();
 425                 setLyXSeries(lex.getString(), font.fontInfo());
 426         } else if (token == "\\shape") {
 427                 lex.next();
 428                 setLyXShape(lex.getString(), font.fontInfo());
 429         } else if (token == "\\size") {
 430                 lex.next();
 431                 setLyXSize(lex.getString(), font.fontInfo());
 432         } else if (token == "\\lang") {
 433                 lex.next();
 434                 string const tok = lex.getString();
 435                 Language const * lang = languages.getLanguage(tok);
 436                 if (lang) {
 437                         font.setLanguage(lang);
 438                 } else {
 439                         font.setLanguage(bp.language);
 440                         lex.printError("Unknown language `$$Token'");
 441                 }
 442         } else if (token == "\\numeric") {
 443                 lex.next();
 444                 font.fontInfo().setNumber(setLyXMisc(lex.getString()));
 445         } else if (token == "\\emph") {
 446                 lex.next();
 447                 font.fontInfo().setEmph(setLyXMisc(lex.getString()));
 448         } else if (token == "\\bar") {
 449                 lex.next();
 450                 string const tok = lex.getString();
 451
 452                 if (tok == "under")
 453                         font.fontInfo().setUnderbar(FONT_ON);
 454                 else if (tok == "no")
 455                         font.fontInfo().setUnderbar(FONT_OFF);
 456                 else if (tok == "default")
 457                         font.fontInfo().setUnderbar(FONT_INHERIT);
 458                 else
 459                         lex.printError("Unknown bar font flag "
 460                                        "`$$Token'");
 461         } else if (token == "\\strikeout") {
 462                 lex.next();
 463                 font.fontInfo().setStrikeout(setLyXMisc(lex.getString()));
 464         } else if (token == "\\uuline") {
 465                 lex.next();
 466                 font.fontInfo().setUuline(setLyXMisc(lex.getString()));
 467         } else if (token == "\\uwave") {
 468                 lex.next();
 469                 font.fontInfo().setUwave(setLyXMisc(lex.getString()));
 470         } else if (token == "\\noun") {
 471                 lex.next();
 472                 font.fontInfo().setNoun(setLyXMisc(lex.getString()));
 473         } else if (token == "\\color") {
 474                 lex.next();
 475                 setLyXColor(lex.getString(), font.fontInfo());
 476         } else if (token == "\\SpecialChar") {
 477                 auto_ptr<Inset> inset;
 478                 inset.reset(new InsetSpecialChar);
 479                 inset->read(lex);
 480                 inset->setBuffer(*buf);
 481                 par.insertInset(par.size(), inset.release(), font, change);
 482         } else if (token == "\\backslash") {
 483                 par.appendChar('\\', font, change);
 484         } else if (token == "\\LyXTable") {
 485                 auto_ptr<Inset> inset(new InsetTabular(buf));
 486                 inset->read(lex);
 487                 par.insertInset(par.size(), inset.release(), font, change);
 488         } else if (token == "\\change_unchanged") {
 489                 change = Change(Change::UNCHANGED);
 490         } else if (token == "\\change_inserted" || token == "\\change_deleted") {
 491                 lex.eatLine();
 492                 istringstream is(lex.getString());
 493                 int aid;
 494                 time_t ct;
 495                 is >> aid >> ct;
 496                 BufferParams::AuthorMap const & am = bp.author_map;
 497                 if (am.find(aid) == am.end()) {
 498                         errorList.push_back(ErrorItem(_("Change tracking error"),
 499                                             bformat(_("Unknown author index for change: %1$d\n"), aid),
 500                                             par.id(), 0, par.size()));
 501                         change = Change(Change::UNCHANGED);
 502                 } else {
 503                         if (token == "\\change_inserted")
 504                                 change = Change(Change::INSERTED, am.find(aid)->second, ct);
 505                         else
 506                                 change = Change(Change::DELETED, am.find(aid)->second, ct);
 507                 }
 508         } else {
 509                 lex.eatLine();
 510                 errorList.push_back(ErrorItem(_("Unknown token"),
 511                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 512                         lex.getDocString()),
 513                         par.id(), 0, par.size()));
 514         }
 515 }
 516
 517
 518 void Text::readParagraph(Paragraph & par, Lexer & lex,
 519         ErrorList & errorList)
 520 {
 521         lex.nextToken();
 522         string token = lex.getString();
 523         Font font;
 524         Change change(Change::UNCHANGED);
 525
 526         while (lex.isOK()) {
 527                 readParToken(par, lex, token, font, change, errorList);
 528
 529                 lex.nextToken();
 530                 token = lex.getString();
 531
 532                 if (token.empty())
 533                         continue;
 534
 535                 if (token == "\\end_layout") {
 536                         //Ok, paragraph finished
 537                         break;
 538                 }
 539
 540                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 541                 if (token == "\\begin_layout" || token == "\\end_document"
 542                     || token == "\\end_inset" || token == "\\begin_deeper"
 543                     || token == "\\end_deeper") {
 544                         lex.pushToken(token);
 545                         lyxerr << "Paragraph ended in line "
 546                                << lex.lineNumber() << "\n"
 547                                << "Missing \\end_layout.\n";
 548                         break;
 549                 }
 550         }
 551         // Final change goes to paragraph break:
 552         par.setChange(par.size(), change);
 553
 554         // Initialize begin_of_body_ on load; redoParagraph maintains
 555         par.setBeginOfBody();
 556
 557         // mark paragraph for spell checking on load
 558         // par.requestSpellCheck();
 559 }
 560
 561
 562 class TextCompletionList : public CompletionList
 563 {
 564 public:
 565         ///
 566         TextCompletionList(Cursor const & cur, WordList const * list)
 567                 : buffer_(cur.buffer()), pos_(0), list_(list)
 568         {}
 569         ///
 570         virtual ~TextCompletionList() {}
 571
 572         ///
 573         virtual bool sorted() const { return true; }
 574         ///
 575         virtual size_t size() const
 576         {
 577                 return list_->size();
 578         }
 579         ///
 580         virtual docstring const & data(size_t idx) const
 581         {
 582                 return list_->word(idx);
 583         }
 584
 585 private:
 586         ///
 587         Buffer const * buffer_;
 588         ///
 589         size_t pos_;
 590         ///
 591         WordList const * list_;
 592 };
 593
 594
 595 bool Text::empty() const
 596 {
 597         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 598                 // FIXME: Should we consider the labeled type as empty too?
 599                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 600 }
 601
 602
 603 double Text::spacing(Paragraph const & par) const
 604 {
 605         if (par.params().spacing().isDefault())
 606                 return owner_->buffer().params().spacing().getValue();
 607         return par.params().spacing().getValue();
 608 }
 609
 610
 611 /**
 612  * This breaks a paragraph at the specified position.
 613  * The new paragraph will:
 614  * - Decrease depth by one (or change layout to default layout) when
 615  *    keep_layout == false
 616  * - keep current depth and layout when keep_layout == true
 617  */
 618 static void breakParagraph(Text & text, pit_type par_offset, pos_type pos,
 619                     bool keep_layout)
 620 {
 621         BufferParams const & bparams = text.inset().buffer().params();
 622         ParagraphList & pars = text.paragraphs();
 623         // create a new paragraph, and insert into the list
 624         ParagraphList::iterator tmp =
 625                 pars.insert(boost::next(pars.begin(), par_offset + 1),
 626                             Paragraph());
 627
 628         Paragraph & par = pars[par_offset];
 629
 630         // remember to set the inset_owner
 631         tmp->setInsetOwner(&par.inInset());
 632         // without doing that we get a crash when typing <Return> at the
 633         // end of a paragraph
 634         tmp->setPlainOrDefaultLayout(bparams.documentClass());
 635
 636         if (keep_layout) {
 637                 tmp->setLayout(par.layout());
 638                 tmp->setLabelWidthString(par.params().labelWidthString());
 639                 tmp->params().depth(par.params().depth());
 640         } else if (par.params().depth() > 0) {
 641                 Paragraph const & hook = pars[text.outerHook(par_offset)];
 642                 tmp->setLayout(hook.layout());
 643                 // not sure the line below is useful
 644                 tmp->setLabelWidthString(par.params().labelWidthString());
 645                 tmp->params().depth(hook.params().depth());
 646         }
 647
 648         bool const isempty = (par.allowEmpty() && par.empty());
 649
 650         if (!isempty && (par.size() > pos || par.empty())) {
 651                 tmp->setLayout(par.layout());
 652                 tmp->params().align(par.params().align());
 653                 tmp->setLabelWidthString(par.params().labelWidthString());
 654
 655                 tmp->params().depth(par.params().depth());
 656                 tmp->params().noindent(par.params().noindent());
 657
 658                 // move everything behind the break position
 659                 // to the new paragraph
 660
 661                 /* Note: if !keepempty, empty() == true, then we reach
 662                  * here with size() == 0. So pos_end becomes - 1. This
 663                  * doesn't cause problems because both loops below
 664                  * enforce pos <= pos_end and 0 <= pos
 665                  */
 666                 pos_type pos_end = par.size() - 1;
 667
 668                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 669                         if (moveItem(par, pos, *tmp, j, bparams)) {
 670                                 ++j;
 671                         }
 672                 }
 673         }
 674
 675         // Move over the end-of-par change information
 676         tmp->setChange(tmp->size(), par.lookupChange(par.size()));
 677         par.setChange(par.size(), Change(bparams.trackChanges ?
 678                                            Change::INSERTED : Change::UNCHANGED));
 679
 680         if (pos) {
 681                 // Make sure that we keep the language when
 682                 // breaking paragraph.
 683                 if (tmp->empty()) {
 684                         Font changed = tmp->getFirstFontSettings(bparams);
 685                         Font const & old = par.getFontSettings(bparams, par.size());
 686                         changed.setLanguage(old.language());
 687                         tmp->setFont(0, changed);
 688                 }
 689
 690                 return;
 691         }
 692
 693         if (!isempty) {
 694                 bool const soa = par.params().startOfAppendix();
 695                 par.params().clear();
 696                 // do not lose start of appendix marker (bug 4212)
 697                 par.params().startOfAppendix(soa);
 698                 par.setPlainOrDefaultLayout(bparams.documentClass());
 699         }
 700
 701         if (keep_layout) {
 702                 par.setLayout(tmp->layout());
 703                 par.setLabelWidthString(tmp->params().labelWidthString());
 704                 par.params().depth(tmp->params().depth());
 705         }
 706 }
 707
 708
 709 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 710 {
 711         LASSERT(this == cur.text(), /**/);
 712
 713         Paragraph & cpar = cur.paragraph();
 714         pit_type cpit = cur.pit();
 715
 716         DocumentClass const & tclass = cur.buffer()->params().documentClass();
 717         Layout const & layout = cpar.layout();
 718
 719         if (cur.lastpos() == 0 && !cpar.allowEmpty()) {
 720                 if (changeDepthAllowed(cur, DEC_DEPTH))
 721                         changeDepth(cur, DEC_DEPTH);
 722                 else
 723                         setLayout(cur, tclass.defaultLayoutName());
 724                 return;
 725         }
 726
 727         cur.recordUndo();
 728
 729         // Always break behind a space
 730         // It is better to erase the space (Dekel)
 731         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 732                 cpar.eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
 733
 734         // What should the layout for the new paragraph be?
 735         bool keep_layout = layout.isEnvironment()
 736                 || (layout.isParagraph() && layout.parbreak_is_newline);
 737         if (inverse_logic)
 738                 keep_layout = !keep_layout;
 739
 740         // We need to remember this before we break the paragraph, because
 741         // that invalidates the layout variable
 742         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 743
 744         // we need to set this before we insert the paragraph.
 745         bool const isempty = cpar.allowEmpty() && cpar.empty();
 746
 747         lyx::breakParagraph(*this, cpit, cur.pos(), keep_layout);
 748
 749         // After this, neither paragraph contains any rows!
 750
 751         cpit = cur.pit();
 752         pit_type next_par = cpit + 1;
 753
 754         // well this is the caption hack since one caption is really enough
 755         if (sensitive) {
 756                 if (cur.pos() == 0)
 757                         // set to standard-layout
 758                 //FIXME Check if this should be plainLayout() in some cases
 759                         pars_[cpit].applyLayout(tclass.defaultLayout());
 760                 else
 761                         // set to standard-layout
 762                         //FIXME Check if this should be plainLayout() in some cases
 763                         pars_[next_par].applyLayout(tclass.defaultLayout());
 764         }
 765
 766         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 767                 if (!pars_[next_par].eraseChar(0, cur.buffer()->params().trackChanges))
 768                         break; // the character couldn't be deleted physically due to change tracking
 769         }
 770
 771         // A singlePar update is not enough in this case.
 772         cur.screenUpdateFlags(Update::Force);
 773         cur.forceBufferUpdate();
 774
 775         // This check is necessary. Otherwise the new empty paragraph will
 776         // be deleted automatically. And it is more friendly for the user!
 777         if (cur.pos() != 0 || isempty)
 778                 setCursor(cur, cur.pit() + 1, 0);
 779         else
 780                 setCursor(cur, cur.pit(), 0);
 781 }
 782
 783
 784 // needed to insert the selection
 785 void Text::insertStringAsLines(Cursor & cur, docstring const & str,
 786                 Font const & font)
 787 {
 788         BufferParams const & bparams = owner_->buffer().params();
 789         pit_type pit = cur.pit();
 790         pos_type pos = cur.pos();
 791
 792         // insert the string, don't insert doublespace
 793         bool space_inserted = true;
 794         for (docstring::const_iterator cit = str.begin();
 795             cit != str.end(); ++cit) {
 796                 Paragraph & par = pars_[pit];
 797                 if (*cit == '\n') {
 798                         if (autoBreakRows_ && (!par.empty() || par.allowEmpty())) {
 799                                 lyx::breakParagraph(*this, pit, pos,
 800                                         par.layout().isEnvironment());
 801                                 ++pit;
 802                                 pos = 0;
 803                                 space_inserted = true;
 804                         } else {
 805                                 continue;
 806                         }
 807                         // do not insert consecutive spaces if !free_spacing
 808                 } else if ((*cit == ' ' || *cit == '\t') &&
 809                            space_inserted && !par.isFreeSpacing()) {
 810                         continue;
 811                 } else if (*cit == '\t') {
 812                         if (!par.isFreeSpacing()) {
 813                                 // tabs are like spaces here
 814                                 par.insertChar(pos, ' ', font, bparams.trackChanges);
 815                                 ++pos;
 816                                 space_inserted = true;
 817                         } else {
 818                                 par.insertChar(pos, *cit, font, bparams.trackChanges);
 819                                 ++pos;
 820                                 space_inserted = true;
 821                         }
 822                 } else if (!isPrintable(*cit)) {
 823                         // Ignore unprintables
 824                         continue;
 825                 } else {
 826                         // just insert the character
 827                         par.insertChar(pos, *cit, font, bparams.trackChanges);
 828                         ++pos;
 829                         space_inserted = (*cit == ' ');
 830                 }
 831         }
 832         setCursor(cur, pit, pos);
 833 }
 834
 835
 836 // turn double CR to single CR, others are converted into one
 837 // blank. Then insertStringAsLines is called
 838 void Text::insertStringAsParagraphs(Cursor & cur, docstring const & str,
 839                 Font const & font)
 840 {
 841         docstring linestr = str;
 842         bool newline_inserted = false;
 843
 844         for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 845                 if (linestr[i] == '\n') {
 846                         if (newline_inserted) {
 847                                 // we know that \r will be ignored by
 848                                 // insertStringAsLines. Of course, it is a dirty
 849                                 // trick, but it works...
 850                                 linestr[i - 1] = '\r';
 851                                 linestr[i] = '\n';
 852                         } else {
 853                                 linestr[i] = ' ';
 854                                 newline_inserted = true;
 855                         }
 856                 } else if (isPrintable(linestr[i])) {
 857                         newline_inserted = false;
 858                 }
 859         }
 860         insertStringAsLines(cur, linestr, font);
 861 }
 862
 863
 864 // insert a character, moves all the following breaks in the
 865 // same Paragraph one to the right and make a rebreak
 866 void Text::insertChar(Cursor & cur, char_type c)
 867 {
 868         LASSERT(this == cur.text(), /**/);
 869
 870         cur.recordUndo(INSERT_UNDO);
 871
 872         TextMetrics const & tm = cur.bv().textMetrics(this);
 873         Buffer const & buffer = *cur.buffer();
 874         Paragraph & par = cur.paragraph();
 875         // try to remove this
 876         pit_type const pit = cur.pit();
 877
 878         bool const freeSpacing = par.layout().free_spacing ||
 879                 par.isFreeSpacing();
 880
 881         if (lyxrc.auto_number) {
 882                 static docstring const number_operators = from_ascii("+-/*");
 883                 static docstring const number_unary_operators = from_ascii("+-");
 884                 static docstring const number_seperators = from_ascii(".,:");
 885
 886                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 887                         if (!isDigitASCII(c) && !contains(number_operators, c) &&
 888                             !(contains(number_seperators, c) &&
 889                               cur.pos() != 0 &&
 890                               cur.pos() != cur.lastpos() &&
 891                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 892                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 893                            )
 894                                 number(cur); // Set current_font.number to OFF
 895                 } else if (isDigitASCII(c) &&
 896                            cur.real_current_font.isVisibleRightToLeft()) {
 897                         number(cur); // Set current_font.number to ON
 898
 899                         if (cur.pos() != 0) {
 900                                 char_type const c = par.getChar(cur.pos() - 1);
 901                                 if (contains(number_unary_operators, c) &&
 902                                     (cur.pos() == 1
 903                                      || par.isSeparator(cur.pos() - 2)
 904                                      || par.isNewline(cur.pos() - 2))
 905                                   ) {
 906                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 907                                                 tm.font_);
 908                                 } else if (contains(number_seperators, c)
 909                                      && cur.pos() >= 2
 910                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 911                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 912                                                 tm.font_);
 913                                 }
 914                         }
 915                 }
 916         }
 917
 918         // In Bidi text, we want spaces to be treated in a special way: spaces
 919         // which are between words in different languages should get the
 920         // paragraph's language; otherwise, spaces should keep the language
 921         // they were originally typed in. This is only in effect while typing;
 922         // after the text is already typed in, the user can always go back and
 923         // explicitly set the language of a space as desired. But 99.9% of the
 924         // time, what we're doing here is what the user actually meant.
 925         //
 926         // The following cases are the ones in which the language of the space
 927         // should be changed to match that of the containing paragraph. In the
 928         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 929         // represents a space, pipe (|) represents the cursor position (so the
 930         // character before it is the one just typed in). The different cases
 931         // are depicted logically (not visually), from left to right:
 932         //
 933         // 1. A_a|
 934         // 2. a_A|
 935         //
 936         // Theoretically, there are other situations that we should, perhaps, deal
 937         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 938         // point (to understand why, just try to create this situation...).
 939
 940         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 941                 // get font in front and behind the space in question. But do NOT
 942                 // use getFont(cur.pos()) because the character c is not inserted yet
 943                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 944                 Font const & post_space_font = cur.real_current_font;
 945                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 946                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 947
 948                 if (pre_space_rtl != post_space_rtl) {
 949                         // Set the space's language to match the language of the
 950                         // adjacent character whose direction is the paragraph's
 951                         // direction; don't touch other properties of the font
 952                         Language const * lang =
 953                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 954                                 pre_space_font.language() : post_space_font.language();
 955
 956                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
 957                         space_font.setLanguage(lang);
 958                         par.setFont(cur.pos() - 1, space_font);
 959                 }
 960         }
 961
 962         // Next check, if there will be two blanks together or a blank at
 963         // the beginning of a paragraph.
 964         // I decided to handle blanks like normal characters, the main
 965         // difference are the special checks when calculating the row.fill
 966         // (blank does not count at the end of a row) and the check here
 967
 968         // When the free-spacing option is set for the current layout,
 969         // disable the double-space checking
 970         if (!freeSpacing && isLineSeparatorChar(c)) {
 971                 if (cur.pos() == 0) {
 972                         cur.message(_(
 973                                         "You cannot insert a space at the "
 974                                         "beginning of a paragraph. Please read the Tutorial."));
 975                         return;
 976                 }
 977                 LASSERT(cur.pos() > 0, /**/);
 978                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 979                                 && !par.isDeleted(cur.pos() - 1)) {
 980                         cur.message(_(
 981                                         "You cannot type two spaces this way. "
 982                                         "Please read the Tutorial."));
 983                         return;
 984                 }
 985         }
 986
 987         par.insertChar(cur.pos(), c, cur.current_font,
 988                 cur.buffer()->params().trackChanges);
 989         cur.checkBufferStructure();
 990
 991 //              cur.screenUpdateFlags(Update::Force);
 992         bool boundary = cur.boundary()
 993                 || tm.isRTLBoundary(cur.pit(), cur.pos() + 1);
 994         setCursor(cur, cur.pit(), cur.pos() + 1, false, boundary);
 995         charInserted(cur);
 996 }
 997
 998
 999 void Text::charInserted(Cursor & cur)
1000 {
1001         Paragraph & par = cur.paragraph();
1002
1003         // Here we call finishUndo for every 20 characters inserted.
1004         // This is from my experience how emacs does it. (Lgb)
1005         if (undo_counter_ < 20) {
1006                 ++undo_counter_;
1007         } else {
1008                 cur.finishUndo();
1009                 undo_counter_ = 0;
1010         }
1011
1012         // register word if a non-letter was entered
1013         if (cur.pos() > 1
1014             && !par.isWordSeparator(cur.pos() - 2)
1015             && par.isWordSeparator(cur.pos() - 1)) {
1016                 // get the word in front of cursor
1017                 LASSERT(this == cur.text(), /**/);
1018                 cur.paragraph().updateWords();
1019         }
1020 }
1021
1022
1023 // the cursor set functions have a special mechanism. When they
1024 // realize, that you left an empty paragraph, they will delete it.
1025
1026 bool Text::cursorForwardOneWord(Cursor & cur)
1027 {
1028         LASSERT(this == cur.text(), /**/);
1029
1030         pos_type const lastpos = cur.lastpos();
1031         pit_type pit = cur.pit();
1032         pos_type pos = cur.pos();
1033         Paragraph const & par = cur.paragraph();
1034
1035         // Paragraph boundary is a word boundary
1036         if (pos == lastpos) {
1037                 if (pit != cur.lastpit())
1038                         return setCursor(cur, pit + 1, 0);
1039                 else
1040                         return false;
1041         }
1042
1043         if (lyxrc.mac_like_word_movement) {
1044                 // Skip through trailing punctuation and spaces.
1045                 while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
1046                         ++pos;
1047
1048                 // Skip over either a non-char inset or a full word
1049                 if (pos != lastpos && par.isWordSeparator(pos))
1050                         ++pos;
1051                 else while (pos != lastpos && !par.isWordSeparator(pos))
1052                              ++pos;
1053         } else {
1054                 LASSERT(pos < lastpos, /**/); // see above
1055                 if (!par.isWordSeparator(pos))
1056                         while (pos != lastpos && !par.isWordSeparator(pos))
1057                                 ++pos;
1058                 else if (par.isChar(pos))
1059                         while (pos != lastpos && par.isChar(pos))
1060                                 ++pos;
1061                 else if (!par.isSpace(pos)) // non-char inset
1062                         ++pos;
1063
1064                 // Skip over white space
1065                 while (pos != lastpos && par.isSpace(pos))
1066                              ++pos;
1067         }
1068
1069         return setCursor(cur, pit, pos);
1070 }
1071
1072
1073 bool Text::cursorBackwardOneWord(Cursor & cur)
1074 {
1075         LASSERT(this == cur.text(), /**/);
1076
1077         pit_type pit = cur.pit();
1078         pos_type pos = cur.pos();
1079         Paragraph & par = cur.paragraph();
1080
1081         // Paragraph boundary is a word boundary
1082         if (pos == 0 && pit != 0)
1083                 return setCursor(cur, pit - 1, getPar(pit - 1).size());
1084
1085         if (lyxrc.mac_like_word_movement) {
1086                 // Skip through punctuation and spaces.
1087                 while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
1088                         --pos;
1089
1090                 // Skip over either a non-char inset or a full word
1091                 if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
1092                         --pos;
1093                 else while (pos != 0 && !par.isWordSeparator(pos - 1))
1094                              --pos;
1095         } else {
1096                 // Skip over white space
1097                 while (pos != 0 && par.isSpace(pos - 1))
1098                              --pos;
1099
1100                 if (pos != 0 && !par.isWordSeparator(pos - 1))
1101                         while (pos != 0 && !par.isWordSeparator(pos - 1))
1102                                 --pos;
1103                 else if (pos != 0 && par.isChar(pos - 1))
1104                         while (pos != 0 && par.isChar(pos - 1))
1105                                 --pos;
1106                 else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
1107                         --pos;
1108         }
1109
1110         return setCursor(cur, pit, pos);
1111 }
1112
1113
1114 bool Text::cursorVisLeftOneWord(Cursor & cur)
1115 {
1116         LASSERT(this == cur.text(), /**/);
1117
1118         pos_type left_pos, right_pos;
1119         bool left_is_letter, right_is_letter;
1120
1121         Cursor temp_cur = cur;
1122
1123         // always try to move at least once...
1124         while (temp_cur.posVisLeft(true /* skip_inset */)) {
1125
1126                 // collect some information about current cursor position
1127                 temp_cur.getSurroundingPos(left_pos, right_pos);
1128                 left_is_letter =
1129                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1130                 right_is_letter =
1131                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1132
1133                 // if we're not at a letter/non-letter boundary, continue moving
1134                 if (left_is_letter == right_is_letter)
1135                         continue;
1136
1137                 // we should stop when we have an LTR word on our right or an RTL word
1138                 // on our left
1139                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1140                                 temp_cur.buffer()->params(), left_pos).isRightToLeft())
1141                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1142                                 temp_cur.buffer()->params(), right_pos).isRightToLeft()))
1143                         break;
1144         }
1145
1146         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1147                                          true, temp_cur.boundary());
1148 }
1149
1150
1151 bool Text::cursorVisRightOneWord(Cursor & cur)
1152 {
1153         LASSERT(this == cur.text(), /**/);
1154
1155         pos_type left_pos, right_pos;
1156         bool left_is_letter, right_is_letter;
1157
1158         Cursor temp_cur = cur;
1159
1160         // always try to move at least once...
1161         while (temp_cur.posVisRight(true /* skip_inset */)) {
1162
1163                 // collect some information about current cursor position
1164                 temp_cur.getSurroundingPos(left_pos, right_pos);
1165                 left_is_letter =
1166                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1167                 right_is_letter =
1168                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1169
1170                 // if we're not at a letter/non-letter boundary, continue moving
1171                 if (left_is_letter == right_is_letter)
1172                         continue;
1173
1174                 // we should stop when we have an LTR word on our right or an RTL word
1175                 // on our left
1176                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1177                                 temp_cur.buffer()->params(),
1178                                 left_pos).isRightToLeft())
1179                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1180                                 temp_cur.buffer()->params(),
1181                                 right_pos).isRightToLeft()))
1182                         break;
1183         }
1184
1185         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1186                                          true, temp_cur.boundary());
1187 }
1188
1189
1190 void Text::selectWord(Cursor & cur, word_location loc)
1191 {
1192         LASSERT(this == cur.text(), /**/);
1193         CursorSlice from = cur.top();
1194         CursorSlice to = cur.top();
1195         getWord(from, to, loc);
1196         if (cur.top() != from)
1197                 setCursor(cur, from.pit(), from.pos());
1198         if (to == from)
1199                 return;
1200         if (!cur.selection())
1201                 cur.resetAnchor();
1202         setCursor(cur, to.pit(), to.pos());
1203         cur.setSelection();
1204         cur.setWordSelection(true);
1205 }
1206
1207
1208 void Text::selectAll(Cursor & cur)
1209 {
1210         LASSERT(this == cur.text(), /**/);
1211         if (cur.lastpos() == 0 && cur.lastpit() == 0)
1212                 return;
1213         // If the cursor is at the beginning, make sure the cursor ends there
1214         if (cur.pit() == 0 && cur.pos() == 0) {
1215                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1216                 cur.resetAnchor();
1217                 setCursor(cur, 0, 0);
1218         } else {
1219                 setCursor(cur, 0, 0);
1220                 cur.resetAnchor();
1221                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1222         }
1223         cur.setSelection();
1224 }
1225
1226
1227 // Select the word currently under the cursor when no
1228 // selection is currently set
1229 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
1230 {
1231         LASSERT(this == cur.text(), /**/);
1232         if (cur.selection())
1233                 return false;
1234         selectWord(cur, loc);
1235         return cur.selection();
1236 }
1237
1238
1239 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
1240 {
1241         LASSERT(this == cur.text(), /**/);
1242
1243         if (!cur.selection()) {
1244                 bool const changed = cur.paragraph().isChanged(cur.pos());
1245                 if (!(changed && findNextChange(&cur.bv())))
1246                         return;
1247         }
1248
1249         cur.recordUndoSelection();
1250
1251         pit_type begPit = cur.selectionBegin().pit();
1252         pit_type endPit = cur.selectionEnd().pit();
1253
1254         pos_type begPos = cur.selectionBegin().pos();
1255         pos_type endPos = cur.selectionEnd().pos();
1256
1257         // keep selection info, because endPos becomes invalid after the first loop
1258         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
1259
1260         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
1261
1262         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1263                 pos_type parSize = pars_[pit].size();
1264
1265                 // ignore empty paragraphs; otherwise, an assertion will fail for
1266                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
1267                 if (parSize == 0)
1268                         continue;
1269
1270                 // do not consider first paragraph if the cursor starts at pos size()
1271                 if (pit == begPit && begPos == parSize)
1272                         continue;
1273
1274                 // do not consider last paragraph if the cursor ends at pos 0
1275                 if (pit == endPit && endPos == 0)
1276                         break; // last iteration anyway
1277
1278                 pos_type left  = (pit == begPit ? begPos : 0);
1279                 pos_type right = (pit == endPit ? endPos : parSize);
1280
1281                 if (left == right)
1282                         // there is no change here
1283                         continue;
1284
1285                 if (op == ACCEPT) {
1286                         pars_[pit].acceptChanges(left, right);
1287                 } else {
1288                         pars_[pit].rejectChanges(left, right);
1289                 }
1290         }
1291
1292         // next, accept/reject imaginary end-of-par characters
1293
1294         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1295                 pos_type pos = pars_[pit].size();
1296
1297                 // skip if the selection ends before the end-of-par
1298                 if (pit == endPit && endsBeforeEndOfPar)
1299                         break; // last iteration anyway
1300
1301                 // skip if this is not the last paragraph of the document
1302                 // note: the user should be able to accept/reject the par break of the last par!
1303                 if (pit == endPit && pit + 1 != int(pars_.size()))
1304                         break; // last iteration anway
1305
1306                 if (op == ACCEPT) {
1307                         if (pars_[pit].isInserted(pos)) {
1308                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1309                         } else if (pars_[pit].isDeleted(pos)) {
1310                                 if (pit + 1 == int(pars_.size())) {
1311                                         // we cannot remove a par break at the end of the last paragraph;
1312                                         // instead, we mark it unchanged
1313                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1314                                 } else {
1315                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1316                                         --endPit;
1317                                         --pit;
1318                                 }
1319                         }
1320                 } else {
1321                         if (pars_[pit].isDeleted(pos)) {
1322                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1323                         } else if (pars_[pit].isInserted(pos)) {
1324                                 if (pit + 1 == int(pars_.size())) {
1325                                         // we mark the par break at the end of the last paragraph unchanged
1326                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1327                                 } else {
1328                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1329                                         --endPit;
1330                                         --pit;
1331                                 }
1332                         }
1333                 }
1334         }
1335
1336         // finally, invoke the DEPM
1337
1338         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().trackChanges);
1339
1340         //
1341
1342         cur.finishUndo();
1343         cur.clearSelection();
1344         setCursorIntern(cur, begPit, begPos);
1345         cur.screenUpdateFlags(Update::Force);
1346         cur.forceBufferUpdate();
1347 }
1348
1349
1350 void Text::acceptChanges()
1351 {
1352         BufferParams const & bparams = owner_->buffer().params();
1353         lyx::acceptChanges(pars_, bparams);
1354         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
1355 }
1356
1357
1358 void Text::rejectChanges()
1359 {
1360         BufferParams const & bparams = owner_->buffer().params();
1361         pit_type pars_size = static_cast<pit_type>(pars_.size());
1362
1363         // first, reject changes within each individual paragraph
1364         // (do not consider end-of-par)
1365         for (pit_type pit = 0; pit < pars_size; ++pit) {
1366                 if (!pars_[pit].empty())   // prevent assertion failure
1367                         pars_[pit].rejectChanges(0, pars_[pit].size());
1368         }
1369
1370         // next, reject imaginary end-of-par characters
1371         for (pit_type pit = 0; pit < pars_size; ++pit) {
1372                 pos_type pos = pars_[pit].size();
1373
1374                 if (pars_[pit].isDeleted(pos)) {
1375                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1376                 } else if (pars_[pit].isInserted(pos)) {
1377                         if (pit == pars_size - 1) {
1378                                 // we mark the par break at the end of the last
1379                                 // paragraph unchanged
1380                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1381                         } else {
1382                                 mergeParagraph(bparams, pars_, pit);
1383                                 --pit;
1384                                 --pars_size;
1385                         }
1386                 }
1387         }
1388
1389         // finally, invoke the DEPM
1390         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
1391 }
1392
1393
1394 void Text::deleteWordForward(Cursor & cur)
1395 {
1396         LASSERT(this == cur.text(), /**/);
1397         if (cur.lastpos() == 0)
1398                 cursorForward(cur);
1399         else {
1400                 cur.resetAnchor();
1401                 cur.setSelection(true);
1402                 cursorForwardOneWord(cur);
1403                 cur.setSelection();
1404                 cutSelection(cur, true, false);
1405                 cur.checkBufferStructure();
1406         }
1407 }
1408
1409
1410 void Text::deleteWordBackward(Cursor & cur)
1411 {
1412         LASSERT(this == cur.text(), /**/);
1413         if (cur.lastpos() == 0)
1414                 cursorBackward(cur);
1415         else {
1416                 cur.resetAnchor();
1417                 cur.setSelection(true);
1418                 cursorBackwardOneWord(cur);
1419                 cur.setSelection();
1420                 cutSelection(cur, true, false);
1421                 cur.checkBufferStructure();
1422         }
1423 }
1424
1425
1426 // Kill to end of line.
1427 void Text::changeCase(Cursor & cur, TextCase action)
1428 {
1429         LASSERT(this == cur.text(), /**/);
1430         CursorSlice from;
1431         CursorSlice to;
1432
1433         bool gotsel = false;
1434         if (cur.selection()) {
1435                 from = cur.selBegin();
1436                 to = cur.selEnd();
1437                 gotsel = true;
1438         } else {
1439                 from = cur.top();
1440                 getWord(from, to, PARTIAL_WORD);
1441                 cursorForwardOneWord(cur);
1442         }
1443
1444         cur.recordUndoSelection();
1445
1446         pit_type begPit = from.pit();
1447         pit_type endPit = to.pit();
1448
1449         pos_type begPos = from.pos();
1450         pos_type endPos = to.pos();
1451
1452         pos_type right = 0; // needed after the for loop
1453
1454         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1455                 Paragraph & par = pars_[pit];
1456                 pos_type const pos = (pit == begPit ? begPos : 0);
1457                 right = (pit == endPit ? endPos : par.size());
1458                 par.changeCase(cur.buffer()->params(), pos, right, action);
1459         }
1460
1461         // the selection may have changed due to logically-only deleted chars
1462         if (gotsel) {
1463                 setCursor(cur, begPit, begPos);
1464                 cur.resetAnchor();
1465                 setCursor(cur, endPit, right);
1466                 cur.setSelection();
1467         } else
1468                 setCursor(cur, endPit, right);
1469
1470         cur.checkBufferStructure();
1471 }
1472
1473
1474 bool Text::handleBibitems(Cursor & cur)
1475 {
1476         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
1477                 return false;
1478
1479         if (cur.pos() != 0)
1480                 return false;
1481
1482         BufferParams const & bufparams = cur.buffer()->params();
1483         Paragraph const & par = cur.paragraph();
1484         Cursor prevcur = cur;
1485         if (cur.pit() > 0) {
1486                 --prevcur.pit();
1487                 prevcur.pos() = prevcur.lastpos();
1488         }
1489         Paragraph const & prevpar = prevcur.paragraph();
1490
1491         // if a bibitem is deleted, merge with previous paragraph
1492         // if this is a bibliography item as well
1493         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1494                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1495                 mergeParagraph(bufparams, cur.text()->paragraphs(),
1496                                                         prevcur.pit());
1497                 cur.forceBufferUpdate();
1498                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1499                 cur.screenUpdateFlags(Update::Force);
1500                 return true;
1501         }
1502
1503         // otherwise reset to default
1504         cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
1505         return true;
1506 }
1507
1508
1509 bool Text::erase(Cursor & cur)
1510 {
1511         LASSERT(this == cur.text(), return false);
1512         bool needsUpdate = false;
1513         Paragraph & par = cur.paragraph();
1514
1515         if (cur.pos() != cur.lastpos()) {
1516                 // this is the code for a normal delete, not pasting
1517                 // any paragraphs
1518                 cur.recordUndo(DELETE_UNDO);
1519                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1520                 if(!par.eraseChar(cur.pos(), cur.buffer()->params().trackChanges))
1521                         // the character has been logically deleted only => skip it
1522                         cur.top().forwardPos();
1523
1524                 if (was_inset)
1525                         cur.forceBufferUpdate();
1526                 else
1527                         cur.checkBufferStructure();
1528                 needsUpdate = true;
1529         } else {
1530                 if (cur.pit() == cur.lastpit())
1531                         return dissolveInset(cur);
1532
1533                 if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1534                         par.setChange(cur.pos(), Change(Change::DELETED));
1535                         cur.forwardPos();
1536                         needsUpdate = true;
1537                 } else {
1538                         setCursorIntern(cur, cur.pit() + 1, 0);
1539                         needsUpdate = backspacePos0(cur);
1540                 }
1541         }
1542
1543         needsUpdate |= handleBibitems(cur);
1544
1545         if (needsUpdate) {
1546                 // Make sure the cursor is correct. Is this really needed?
1547                 // No, not really... at least not here!
1548                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1549                 cur.checkBufferStructure();
1550         }
1551
1552         return needsUpdate;
1553 }
1554
1555
1556 bool Text::backspacePos0(Cursor & cur)
1557 {
1558         LASSERT(this == cur.text(), /**/);
1559         if (cur.pit() == 0)
1560                 return false;
1561
1562         bool needsUpdate = false;
1563
1564         BufferParams const & bufparams = cur.buffer()->params();
1565         DocumentClass const & tclass = bufparams.documentClass();
1566         ParagraphList & plist = cur.text()->paragraphs();
1567         Paragraph const & par = cur.paragraph();
1568         Cursor prevcur = cur;
1569         --prevcur.pit();
1570         prevcur.pos() = prevcur.lastpos();
1571         Paragraph const & prevpar = prevcur.paragraph();
1572
1573         // is it an empty paragraph?
1574         if (cur.lastpos() == 0
1575             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1576                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1577                 plist.erase(boost::next(plist.begin(), cur.pit()));
1578                 needsUpdate = true;
1579         }
1580         // is previous par empty?
1581         else if (prevcur.lastpos() == 0
1582                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1583                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1584                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1585                 needsUpdate = true;
1586         }
1587         // Pasting is not allowed, if the paragraphs have different
1588         // layouts. I think it is a real bug of all other
1589         // word processors to allow it. It confuses the user.
1590         // Correction: Pasting is always allowed with standard-layout
1591         // or the empty layout.
1592         else if (par.layout() == prevpar.layout()
1593                  || tclass.isDefaultLayout(par.layout())
1594                  || tclass.isPlainLayout(par.layout())) {
1595                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1596                 mergeParagraph(bufparams, plist, prevcur.pit());
1597                 needsUpdate = true;
1598         }
1599
1600         if (needsUpdate) {
1601                 cur.forceBufferUpdate();
1602                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1603         }
1604
1605         return needsUpdate;
1606 }
1607
1608
1609 bool Text::backspace(Cursor & cur)
1610 {
1611         LASSERT(this == cur.text(), /**/);
1612         bool needsUpdate = false;
1613         if (cur.pos() == 0) {
1614                 if (cur.pit() == 0)
1615                         return dissolveInset(cur);
1616
1617                 Paragraph & prev_par = pars_[cur.pit() - 1];
1618
1619                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1620                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1621                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1622                         return true;
1623                 }
1624                 // The cursor is at the beginning of a paragraph, so
1625                 // the backspace will collapse two paragraphs into one.
1626                 needsUpdate = backspacePos0(cur);
1627
1628         } else {
1629                 // this is the code for a normal backspace, not pasting
1630                 // any paragraphs
1631                 cur.recordUndo(DELETE_UNDO);
1632                 // We used to do cursorBackwardIntern() here, but it is
1633                 // not a good idea since it triggers the auto-delete
1634                 // mechanism. So we do a cursorBackwardIntern()-lite,
1635                 // without the dreaded mechanism. (JMarc)
1636                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1637                                 false, cur.boundary());
1638                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1639                 cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
1640                 if (was_inset)
1641                         cur.forceBufferUpdate();
1642                 else
1643                         cur.checkBufferStructure();
1644         }
1645
1646         if (cur.pos() == cur.lastpos())
1647                 cur.setCurrentFont();
1648
1649         needsUpdate |= handleBibitems(cur);
1650
1651         // A singlePar update is not enough in this case.
1652 //              cur.screenUpdateFlags(Update::Force);
1653         setCursor(cur.top(), cur.pit(), cur.pos());
1654
1655         return needsUpdate;
1656 }
1657
1658
1659 bool Text::dissolveInset(Cursor & cur)
1660 {
1661         LASSERT(this == cur.text(), return false);
1662
1663         if (isMainText() || cur.inset().nargs() != 1)
1664                 return false;
1665
1666         cur.recordUndoInset();
1667         cur.setMark(false);
1668         cur.selHandle(false);
1669         // save position
1670         pos_type spos = cur.pos();
1671         pit_type spit = cur.pit();
1672         ParagraphList plist;
1673         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1674                 plist = paragraphs();
1675         cur.popBackward();
1676         // store cursor offset
1677         if (spit == 0)
1678                 spos += cur.pos();
1679         spit += cur.pit();
1680         Buffer & b = *cur.buffer();
1681         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1682
1683         if (!plist.empty()) {
1684                 // see bug 7319
1685                 // we clear the cache so that we won't get conflicts with labels
1686                 // that get pasted into the buffer. we should update this before
1687                 // its being empty matters. if not (i.e., if we encounter bugs),
1688                 // then this should instead be:
1689                 //        cur.buffer().updateBuffer();
1690                 // but we'll try the cheaper solution here.
1691                 cur.buffer()->clearReferenceCache();
1692
1693                 // ERT paragraphs have the Language latex_language.
1694                 // This is invalid outside of ERT, so we need to
1695                 // change it to the buffer language.
1696                 ParagraphList::iterator it = plist.begin();
1697                 ParagraphList::iterator it_end = plist.end();
1698                 for (; it != it_end; ++it)
1699                         it->changeLanguage(b.params(), latex_language, b.language());
1700
1701                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1702                                    b.errorList("Paste"));
1703                 // restore position
1704                 cur.pit() = min(cur.lastpit(), spit);
1705                 cur.pos() = min(cur.lastpos(), spos);
1706         }
1707
1708         cur.forceBufferUpdate();
1709
1710         // Ensure the current language is set correctly (bug 6292)
1711         cur.text()->setCursor(cur, cur.pit(), cur.pos());
1712         cur.clearSelection();
1713         cur.resetAnchor();
1714         return true;
1715 }
1716
1717
1718 void Text::getWord(CursorSlice & from, CursorSlice & to,
1719         word_location const loc) const
1720 {
1721         to = from;
1722         pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
1723 }
1724
1725
1726 void Text::write(ostream & os) const
1727 {
1728         Buffer const & buf = owner_->buffer();
1729         ParagraphList::const_iterator pit = paragraphs().begin();
1730         ParagraphList::const_iterator end = paragraphs().end();
1731         depth_type dth = 0;
1732         for (; pit != end; ++pit)
1733                 pit->write(os, buf.params(), dth);
1734
1735         // Close begin_deeper
1736         for(; dth > 0; --dth)
1737                 os << "\n\\end_deeper";
1738 }
1739
1740
1741 bool Text::read(Lexer & lex,
1742                 ErrorList & errorList, InsetText * insetPtr)
1743 {
1744         Buffer const & buf = owner_->buffer();
1745         depth_type depth = 0;
1746         bool res = true;
1747
1748         while (lex.isOK()) {
1749                 lex.nextToken();
1750                 string const token = lex.getString();
1751
1752                 if (token.empty())
1753                         continue;
1754
1755                 if (token == "\\end_inset")
1756                         break;
1757
1758                 if (token == "\\end_body")
1759                         continue;
1760
1761                 if (token == "\\begin_body")
1762                         continue;
1763
1764                 if (token == "\\end_document") {
1765                         res = false;
1766                         break;
1767                 }
1768
1769                 if (token == "\\begin_layout") {
1770                         lex.pushToken(token);
1771
1772                         Paragraph par;
1773                         par.setInsetOwner(insetPtr);
1774                         par.params().depth(depth);
1775                         par.setFont(0, Font(inherit_font, buf.params().language));
1776                         pars_.push_back(par);
1777                         readParagraph(pars_.back(), lex, errorList);
1778
1779                         // register the words in the global word list
1780                         pars_.back().updateWords();
1781                 } else if (token == "\\begin_deeper") {
1782                         ++depth;
1783                 } else if (token == "\\end_deeper") {
1784                         if (!depth)
1785                                 lex.printError("\\end_deeper: " "depth is already null");
1786                         else
1787                                 --depth;
1788                 } else {
1789                         LYXERR0("Handling unknown body token: `" << token << '\'');
1790                 }
1791         }
1792
1793         // avoid a crash on weird documents (bug 4859)
1794         if (pars_.empty()) {
1795                 Paragraph par;
1796                 par.setInsetOwner(insetPtr);
1797                 par.params().depth(depth);
1798                 par.setFont(0, Font(inherit_font,
1799                                     buf.params().language));
1800                 par.setPlainOrDefaultLayout(buf.params().documentClass());
1801                 pars_.push_back(par);
1802         }
1803
1804         return res;
1805 }
1806
1807 // Returns the current font and depth as a message.
1808 docstring Text::currentState(Cursor const & cur) const
1809 {
1810         LASSERT(this == cur.text(), /**/);
1811         Buffer & buf = *cur.buffer();
1812         Paragraph const & par = cur.paragraph();
1813         odocstringstream os;
1814
1815         if (buf.params().trackChanges)
1816                 os << _("[Change Tracking] ");
1817
1818         Change change = par.lookupChange(cur.pos());
1819
1820         if (change.changed()) {
1821                 Author const & a = buf.params().authors().get(change.author);
1822                 os << _("Change: ") << a.name();
1823                 if (!a.email().empty())
1824                         os << " (" << a.email() << ")";
1825                 // FIXME ctime is english, we should translate that
1826                 os << _(" at ") << ctime(&change.changetime);
1827                 os << " : ";
1828         }
1829
1830         // I think we should only show changes from the default
1831         // font. (Asger)
1832         // No, from the document font (MV)
1833         Font font = cur.real_current_font;
1834         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1835
1836         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1837
1838         // The paragraph depth
1839         int depth = cur.paragraph().getDepth();
1840         if (depth > 0)
1841                 os << bformat(_(", Depth: %1$d"), depth);
1842
1843         // The paragraph spacing, but only if different from
1844         // buffer spacing.
1845         Spacing const & spacing = par.params().spacing();
1846         if (!spacing.isDefault()) {
1847                 os << _(", Spacing: ");
1848                 switch (spacing.getSpace()) {
1849                 case Spacing::Single:
1850                         os << _("Single");
1851                         break;
1852                 case Spacing::Onehalf:
1853                         os << _("OneHalf");
1854                         break;
1855                 case Spacing::Double:
1856                         os << _("Double");
1857                         break;
1858                 case Spacing::Other:
1859                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1860                         break;
1861                 case Spacing::Default:
1862                         // should never happen, do nothing
1863                         break;
1864                 }
1865         }
1866
1867 #ifdef DEVEL_VERSION
1868         os << _(", Inset: ") << &cur.inset();
1869         os << _(", Paragraph: ") << cur.pit();
1870         os << _(", Id: ") << par.id();
1871         os << _(", Position: ") << cur.pos();
1872         // FIXME: Why is the check for par.size() needed?
1873         // We are called with cur.pos() == par.size() quite often.
1874         if (!par.empty() && cur.pos() < par.size()) {
1875                 // Force output of code point, not character
1876                 size_t const c = par.getChar(cur.pos());
1877                 os << _(", Char: 0x") << hex << c;
1878         }
1879         os << _(", Boundary: ") << cur.boundary();
1880 //      Row & row = cur.textRow();
1881 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1882 #endif
1883         return os.str();
1884 }
1885
1886
1887 docstring Text::getPossibleLabel(Cursor const & cur) const
1888 {
1889         pit_type pit = cur.pit();
1890
1891         Layout const * layout = &(pars_[pit].layout());
1892
1893         docstring text;
1894         docstring par_text = pars_[pit].asString();
1895
1896         // The return string of math matrices might contain linebreaks
1897         par_text = subst(par_text, '\n', '-');
1898         int const numwords = 3;
1899         for (int i = 0; i < numwords; ++i) {
1900                 if (par_text.empty())
1901                         break;
1902                 docstring head;
1903                 par_text = split(par_text, head, ' ');
1904                 // Is it legal to use spaces in labels ?
1905                 if (i > 0)
1906                         text += '-';
1907                 text += head;
1908         }
1909
1910         // Make sure it isn't too long
1911         unsigned int const max_label_length = 32;
1912         if (text.size() > max_label_length)
1913                 text.resize(max_label_length);
1914
1915         // Will contain the label prefix.
1916         docstring name;
1917
1918         // For section, subsection, etc...
1919         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1920                 Layout const * layout2 = &(pars_[pit - 1].layout());
1921                 if (layout2->latextype != LATEX_PARAGRAPH) {
1922                         --pit;
1923                         layout = layout2;
1924                 }
1925         }
1926         if (layout->latextype != LATEX_PARAGRAPH)
1927                 name = layout->refprefix;
1928
1929         // For captions, we just take the caption type
1930         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1931         if (caption_inset) {
1932                 string const & ftype = static_cast<InsetCaption *>(caption_inset)->type();
1933                 FloatList const & fl = cur.buffer()->params().documentClass().floats();
1934                 if (fl.typeExist(ftype)) {
1935                         Floating const & flt = fl.getType(ftype);
1936                         name = from_utf8(flt.refPrefix());
1937                 }
1938                 if (name.empty())
1939                         name = from_utf8(ftype.substr(0,3));
1940         }
1941
1942         // If none of the above worked, see if the inset knows.
1943         if (name.empty()) {
1944                 InsetLayout const & il = cur.inset().getLayout();
1945                 name = il.refprefix();
1946         }
1947
1948         if (!name.empty())
1949                 text = name + ':' + text;
1950
1951         return text;
1952 }
1953
1954
1955 docstring Text::asString(int options) const
1956 {
1957         return asString(0, pars_.size(), options);
1958 }
1959
1960
1961 docstring Text::asString(pit_type beg, pit_type end, int options) const
1962 {
1963         size_t i = size_t(beg);
1964         docstring str = pars_[i].asString(options);
1965         for (++i; i != size_t(end); ++i) {
1966                 str += '\n';
1967                 str += pars_[i].asString(options);
1968         }
1969         return str;
1970 }
1971
1972
1973 void Text::forToc(docstring & os, size_t maxlen, bool shorten) const
1974 {
1975         if (maxlen == 0)
1976                 maxlen = std::numeric_limits<std::size_t>::max();
1977         else
1978                 LASSERT(maxlen >= 8, maxlen = TOC_ENTRY_LENGTH);
1979         for (size_t i = 0; i != pars_.size() && os.length() < maxlen; ++i)
1980                 pars_[i].forToc(os, maxlen);
1981         if (shorten && os.length() >= maxlen)
1982                 os = os.substr(0, maxlen - 3) + from_ascii("...");
1983 }
1984
1985
1986 void Text::charsTranspose(Cursor & cur)
1987 {
1988         LASSERT(this == cur.text(), /**/);
1989
1990         pos_type pos = cur.pos();
1991
1992         // If cursor is at beginning or end of paragraph, do nothing.
1993         if (pos == cur.lastpos() || pos == 0)
1994                 return;
1995
1996         Paragraph & par = cur.paragraph();
1997
1998         // Get the positions of the characters to be transposed.
1999         pos_type pos1 = pos - 1;
2000         pos_type pos2 = pos;
2001
2002         // In change tracking mode, ignore deleted characters.
2003         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
2004                 ++pos2;
2005         if (pos2 == cur.lastpos())
2006                 return;
2007
2008         while (pos1 >= 0 && par.isDeleted(pos1))
2009                 --pos1;
2010         if (pos1 < 0)
2011                 return;
2012
2013         // Don't do anything if one of the "characters" is not regular text.
2014         if (par.isInset(pos1) || par.isInset(pos2))
2015                 return;
2016
2017         // Store the characters to be transposed (including font information).
2018         char_type const char1 = par.getChar(pos1);
2019         Font const font1 =
2020                 par.getFontSettings(cur.buffer()->params(), pos1);
2021
2022         char_type const char2 = par.getChar(pos2);
2023         Font const font2 =
2024                 par.getFontSettings(cur.buffer()->params(), pos2);
2025
2026         // And finally, we are ready to perform the transposition.
2027         // Track the changes if Change Tracking is enabled.
2028         bool const trackChanges = cur.buffer()->params().trackChanges;
2029
2030         cur.recordUndo();
2031
2032         par.eraseChar(pos2, trackChanges);
2033         par.eraseChar(pos1, trackChanges);
2034         par.insertChar(pos1, char2, font2, trackChanges);
2035         par.insertChar(pos2, char1, font1, trackChanges);
2036
2037         cur.checkBufferStructure();
2038
2039         // After the transposition, move cursor to after the transposition.
2040         setCursor(cur, cur.pit(), pos2);
2041         cur.forwardPos();
2042 }
2043
2044
2045 DocIterator Text::macrocontextPosition() const
2046 {
2047         return macrocontext_position_;
2048 }
2049
2050
2051 void Text::setMacrocontextPosition(DocIterator const & pos)
2052 {
2053         macrocontext_position_ = pos;
2054 }
2055
2056
2057 docstring Text::previousWord(CursorSlice const & sl) const
2058 {
2059         CursorSlice from = sl;
2060         CursorSlice to = sl;
2061         getWord(from, to, PREVIOUS_WORD);
2062         if (sl == from || to == from)
2063                 return docstring();
2064
2065         Paragraph const & par = sl.paragraph();
2066         return par.asString(from.pos(), to.pos());
2067 }
2068
2069
2070 bool Text::completionSupported(Cursor const & cur) const
2071 {
2072         Paragraph const & par = cur.paragraph();
2073         return cur.pos() > 0
2074                 && (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
2075                 && !par.isWordSeparator(cur.pos() - 1);
2076 }
2077
2078
2079 CompletionList const * Text::createCompletionList(Cursor const & cur) const
2080 {
2081         WordList const * list = theWordList(*cur.getFont().language());
2082         return new TextCompletionList(cur, list);
2083 }
2084
2085
2086 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
2087 {
2088         LASSERT(cur.bv().cursor() == cur, /**/);
2089         cur.insert(s);
2090         cur.bv().cursor() = cur;
2091         if (!(cur.result().screenUpdate() & Update::Force))
2092                 cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
2093         return true;
2094 }
2095
2096
2097 docstring Text::completionPrefix(Cursor const & cur) const
2098 {
2099         return previousWord(cur.top());
2100 }
2101
2102 } // namespace lyx