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/InsetIPAMacro.h"
  59 #include "insets/InsetSpace.h"
  60 #include "insets/InsetSpecialChar.h"
  61 #include "insets/InsetTabular.h"
  62
  63 #include "support/convert.h"
  64 #include "support/debug.h"
  65 #include "support/docstream.h"
  66 #include "support/gettext.h"
  67 #include "support/lassert.h"
  68 #include "support/lstrings.h"
  69 #include "support/lyxalgo.h"
  70 #include "support/lyxtime.h"
  71 #include "support/textutils.h"
  72 #include "support/unique_ptr.h"
  73
  74 #include <sstream>
  75
  76
  77 using namespace std;
  78 using namespace lyx::support;
  79
  80 namespace lyx {
  81
  82 using cap::cutSelection;
  83 using cap::pasteParagraphList;
  84
  85 static bool moveItem(Paragraph & fromPar, pos_type fromPos,
  86         Paragraph & toPar, pos_type toPos, BufferParams const & params)
  87 {
  88         // Note: moveItem() does not honour change tracking!
  89         // Therefore, it should only be used for breaking and merging paragraphs
  90
  91         // We need a copy here because the character at fromPos is going to be erased.
  92         Font const tmpFont = fromPar.getFontSettings(params, fromPos);
  93         Change const tmpChange = fromPar.lookupChange(fromPos);
  94
  95         if (Inset * tmpInset = fromPar.getInset(fromPos)) {
  96                 fromPar.releaseInset(fromPos);
  97                 // The inset is not in fromPar any more.
  98                 if (!toPar.insertInset(toPos, tmpInset, tmpFont, tmpChange)) {
  99                         delete tmpInset;
 100                         return false;
 101                 }
 102                 return true;
 103         }
 104
 105         char_type const tmpChar = fromPar.getChar(fromPos);
 106         fromPar.eraseChar(fromPos, false);
 107         toPar.insertChar(toPos, tmpChar, tmpFont, tmpChange);
 108         return true;
 109 }
 110
 111
 112 void breakParagraphConservative(BufferParams const & bparams,
 113         ParagraphList & pars, pit_type pit, pos_type pos)
 114 {
 115         // create a new paragraph
 116         Paragraph & tmp = *pars.insert(lyx::next(pars.begin(), pit + 1),
 117                                        Paragraph());
 118         Paragraph & par = pars[pit];
 119
 120         tmp.setInsetOwner(&par.inInset());
 121         tmp.makeSameLayout(par);
 122
 123         LASSERT(pos <= par.size(), return);
 124
 125         if (pos < par.size()) {
 126                 // move everything behind the break position to the new paragraph
 127                 pos_type pos_end = par.size() - 1;
 128
 129                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 130                         if (moveItem(par, pos, tmp, j, bparams)) {
 131                                 ++j;
 132                         }
 133                 }
 134                 // Move over the end-of-par change information
 135                 tmp.setChange(tmp.size(), par.lookupChange(par.size()));
 136                 par.setChange(par.size(), Change(bparams.track_changes ?
 137                                            Change::INSERTED : Change::UNCHANGED));
 138         }
 139 }
 140
 141
 142 void mergeParagraph(BufferParams const & bparams,
 143         ParagraphList & pars, pit_type par_offset)
 144 {
 145         Paragraph & next = pars[par_offset + 1];
 146         Paragraph & par = pars[par_offset];
 147
 148         pos_type pos_end = next.size() - 1;
 149         pos_type pos_insert = par.size();
 150
 151         // the imaginary end-of-paragraph character (at par.size()) has to be
 152         // marked as unmodified. Otherwise, its change is adopted by the first
 153         // character of the next paragraph.
 154         if (par.isChanged(par.size())) {
 155                 LYXERR(Debug::CHANGES,
 156                    "merging par with inserted/deleted end-of-par character");
 157                 par.setChange(par.size(), Change(Change::UNCHANGED));
 158         }
 159
 160         Change change = next.lookupChange(next.size());
 161
 162         // move the content of the second paragraph to the end of the first one
 163         for (pos_type i = 0, j = pos_insert; i <= pos_end; ++i) {
 164                 if (moveItem(next, 0, par, j, bparams)) {
 165                         ++j;
 166                 }
 167         }
 168
 169         // move the change of the end-of-paragraph character
 170         par.setChange(par.size(), change);
 171
 172         pars.erase(lyx::next(pars.begin(), par_offset + 1));
 173 }
 174
 175
 176 Text::Text(InsetText * owner, bool use_default_layout)
 177         : owner_(owner)
 178 {
 179         pars_.push_back(Paragraph());
 180         Paragraph & par = pars_.back();
 181         par.setInsetOwner(owner);
 182         DocumentClass const & dc = owner->buffer().params().documentClass();
 183         if (use_default_layout)
 184                 par.setDefaultLayout(dc);
 185         else
 186                 par.setPlainLayout(dc);
 187 }
 188
 189
 190 Text::Text(InsetText * owner, Text const & text)
 191         : owner_(owner), pars_(text.pars_)
 192 {
 193         ParagraphList::iterator const end = pars_.end();
 194         ParagraphList::iterator it = pars_.begin();
 195         for (; it != end; ++it)
 196                 it->setInsetOwner(owner);
 197 }
 198
 199
 200 pit_type Text::depthHook(pit_type pit, depth_type depth) const
 201 {
 202         pit_type newpit = pit;
 203
 204         if (newpit != 0)
 205                 --newpit;
 206
 207         while (newpit != 0 && pars_[newpit].getDepth() > depth)
 208                 --newpit;
 209
 210         if (pars_[newpit].getDepth() > depth)
 211                 return pit;
 212
 213         return newpit;
 214 }
 215
 216
 217 pit_type Text::outerHook(pit_type par_offset) const
 218 {
 219         Paragraph const & par = pars_[par_offset];
 220
 221         if (par.getDepth() == 0)
 222                 return pars_.size();
 223         return depthHook(par_offset, depth_type(par.getDepth() - 1));
 224 }
 225
 226
 227 bool Text::isFirstInSequence(pit_type par_offset) const
 228 {
 229         Paragraph const & par = pars_[par_offset];
 230
 231         pit_type dhook_offset = depthHook(par_offset, par.getDepth());
 232
 233         if (dhook_offset == par_offset)
 234                 return true;
 235
 236         Paragraph const & dhook = pars_[dhook_offset];
 237
 238         return dhook.layout() != par.layout()
 239                 || dhook.getDepth() != par.getDepth();
 240 }
 241
 242
 243 pit_type Text::lastInSequence(pit_type pit) const
 244 {
 245         depth_type const depth = pars_[pit].getDepth();
 246         pit_type newpit = pit;
 247
 248         while (size_t(newpit + 1) < pars_.size() &&
 249                (pars_[newpit + 1].getDepth() > depth ||
 250                 (pars_[newpit + 1].getDepth() == depth &&
 251                  pars_[newpit + 1].layout() == pars_[pit].layout())))
 252                 ++newpit;
 253
 254         return newpit;
 255 }
 256
 257
 258 int Text::getTocLevel(pit_type par_offset) const
 259 {
 260         Paragraph const & par = pars_[par_offset];
 261
 262         if (par.layout().isEnvironment() && !isFirstInSequence(par_offset))
 263                 return Layout::NOT_IN_TOC;
 264
 265         return par.layout().toclevel;
 266 }
 267
 268
 269 Font const Text::outerFont(pit_type par_offset) const
 270 {
 271         depth_type par_depth = pars_[par_offset].getDepth();
 272         FontInfo tmpfont = inherit_font;
 273         depth_type prev_par_depth = 0;
 274         // Resolve against environment font information
 275         while (par_offset != pit_type(pars_.size())
 276                && par_depth != prev_par_depth
 277                && par_depth
 278                && !tmpfont.resolved()) {
 279                 prev_par_depth = par_depth;
 280                 par_offset = outerHook(par_offset);
 281                 if (par_offset != pit_type(pars_.size())) {
 282                         tmpfont.realize(pars_[par_offset].layout().font);
 283                         par_depth = pars_[par_offset].getDepth();
 284                 }
 285         }
 286
 287         return Font(tmpfont);
 288 }
 289
 290
 291 static void acceptOrRejectChanges(ParagraphList & pars,
 292         BufferParams const & bparams, Text::ChangeOp op)
 293 {
 294         pit_type pars_size = static_cast<pit_type>(pars.size());
 295
 296         // first, accept or reject changes within each individual
 297         // paragraph (do not consider end-of-par)
 298         for (pit_type pit = 0; pit < pars_size; ++pit) {
 299                 // prevent assertion failure
 300                 if (!pars[pit].empty()) {
 301                         if (op == Text::ACCEPT)
 302                                 pars[pit].acceptChanges(0, pars[pit].size());
 303                         else
 304                                 pars[pit].rejectChanges(0, pars[pit].size());
 305                 }
 306         }
 307
 308         // next, accept or reject imaginary end-of-par characters
 309         for (pit_type pit = 0; pit < pars_size; ++pit) {
 310                 pos_type pos = pars[pit].size();
 311                 if (pars[pit].isChanged(pos)) {
 312                         // keep the end-of-par char if it is inserted and accepted
 313                         // or when it is deleted and rejected.
 314                         if (pars[pit].isInserted(pos) == (op == Text::ACCEPT)) {
 315                                 pars[pit].setChange(pos, Change(Change::UNCHANGED));
 316                         } else {
 317                                 if (pit == pars_size - 1) {
 318                                         // we cannot remove a par break at the end of the last
 319                                         // paragraph; instead, we mark it unchanged
 320                                         pars[pit].setChange(pos, Change(Change::UNCHANGED));
 321                                 } else {
 322                                         mergeParagraph(bparams, pars, pit);
 323                                         --pit;
 324                                         --pars_size;
 325                                 }
 326                         }
 327                 }
 328         }
 329 }
 330
 331
 332 void acceptChanges(ParagraphList & pars, BufferParams const & bparams)
 333 {
 334         acceptOrRejectChanges(pars, bparams, Text::ACCEPT);
 335 }
 336
 337
 338 void rejectChanges(ParagraphList & pars, BufferParams const & bparams)
 339 {
 340         acceptOrRejectChanges(pars, bparams, Text::REJECT);
 341 }
 342
 343
 344 InsetText const & Text::inset() const
 345 {
 346         return *owner_;
 347 }
 348
 349
 350
 351 void Text::readParToken(Paragraph & par, Lexer & lex,
 352         string const & token, Font & font, Change & change, ErrorList & errorList)
 353 {
 354         Buffer * buf = const_cast<Buffer *>(&owner_->buffer());
 355         BufferParams & bp = buf->params();
 356
 357         if (token[0] != '\\') {
 358                 docstring dstr = lex.getDocString();
 359                 par.appendString(dstr, font, change);
 360
 361         } else if (token == "\\begin_layout") {
 362                 lex.eatLine();
 363                 docstring layoutname = lex.getDocString();
 364
 365                 font = Font(inherit_font, bp.language);
 366                 change = Change(Change::UNCHANGED);
 367
 368                 DocumentClass const & tclass = bp.documentClass();
 369
 370                 if (layoutname.empty())
 371                         layoutname = tclass.defaultLayoutName();
 372
 373                 if (owner_->forcePlainLayout()) {
 374                         // in this case only the empty layout is allowed
 375                         layoutname = tclass.plainLayoutName();
 376                 } else if (par.usePlainLayout()) {
 377                         // in this case, default layout maps to empty layout
 378                         if (layoutname == tclass.defaultLayoutName())
 379                                 layoutname = tclass.plainLayoutName();
 380                 } else {
 381                         // otherwise, the empty layout maps to the default
 382                         if (layoutname == tclass.plainLayoutName())
 383                                 layoutname = tclass.defaultLayoutName();
 384                 }
 385
 386                 // When we apply an unknown layout to a document, we add this layout to the textclass
 387                 // of this document. For example, when you apply class article to a beamer document,
 388                 // all unknown layouts such as frame will be added to document class article so that
 389                 // these layouts can keep their original names.
 390                 bool const added_one = tclass.addLayoutIfNeeded(layoutname);
 391                 if (added_one) {
 392                         // Warn the user.
 393                         docstring const s = bformat(_("Layout `%1$s' was not found."), layoutname);
 394                         errorList.push_back(ErrorItem(_("Layout Not Found"), s,
 395                                                       {par.id(), 0}, {par.id(), -1}));
 396                 }
 397
 398                 par.setLayout(bp.documentClass()[layoutname]);
 399
 400                 // Test whether the layout is obsolete.
 401                 Layout const & layout = par.layout();
 402                 if (!layout.obsoleted_by().empty())
 403                         par.setLayout(bp.documentClass()[layout.obsoleted_by()]);
 404
 405                 par.params().read(lex);
 406
 407         } else if (token == "\\end_layout") {
 408                 LYXERR0("Solitary \\end_layout in line " << lex.lineNumber() << "\n"
 409                        << "Missing \\begin_layout ?");
 410         } else if (token == "\\end_inset") {
 411                 LYXERR0("Solitary \\end_inset in line " << lex.lineNumber() << "\n"
 412                        << "Missing \\begin_inset ?");
 413         } else if (token == "\\begin_inset") {
 414                 Inset * inset = readInset(lex, buf);
 415                 if (inset)
 416                         par.insertInset(par.size(), inset, font, change);
 417                 else {
 418                         lex.eatLine();
 419                         docstring line = lex.getDocString();
 420                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 421                                                       {par.id(), 0}, {par.id(), -1}));
 422                 }
 423         } else if (token == "\\family") {
 424                 lex.next();
 425                 setLyXFamily(lex.getString(), font.fontInfo());
 426         } else if (token == "\\series") {
 427                 lex.next();
 428                 setLyXSeries(lex.getString(), font.fontInfo());
 429         } else if (token == "\\shape") {
 430                 lex.next();
 431                 setLyXShape(lex.getString(), font.fontInfo());
 432         } else if (token == "\\size") {
 433                 lex.next();
 434                 setLyXSize(lex.getString(), font.fontInfo());
 435         } else if (token == "\\lang") {
 436                 lex.next();
 437                 string const tok = lex.getString();
 438                 Language const * lang = languages.getLanguage(tok);
 439                 if (lang) {
 440                         font.setLanguage(lang);
 441                 } else {
 442                         font.setLanguage(bp.language);
 443                         lex.printError("Unknown language `$$Token'");
 444                 }
 445         } else if (token == "\\numeric") {
 446                 lex.next();
 447                 font.fontInfo().setNumber(setLyXMisc(lex.getString()));
 448         } else if (token == "\\emph") {
 449                 lex.next();
 450                 font.fontInfo().setEmph(setLyXMisc(lex.getString()));
 451         } else if (token == "\\bar") {
 452                 lex.next();
 453                 string const tok = lex.getString();
 454
 455                 if (tok == "under")
 456                         font.fontInfo().setUnderbar(FONT_ON);
 457                 else if (tok == "no")
 458                         font.fontInfo().setUnderbar(FONT_OFF);
 459                 else if (tok == "default")
 460                         font.fontInfo().setUnderbar(FONT_INHERIT);
 461                 else
 462                         lex.printError("Unknown bar font flag "
 463                                        "`$$Token'");
 464         } else if (token == "\\strikeout") {
 465                 lex.next();
 466                 font.fontInfo().setStrikeout(setLyXMisc(lex.getString()));
 467         } else if (token == "\\uuline") {
 468                 lex.next();
 469                 font.fontInfo().setUuline(setLyXMisc(lex.getString()));
 470         } else if (token == "\\uwave") {
 471                 lex.next();
 472                 font.fontInfo().setUwave(setLyXMisc(lex.getString()));
 473         } else if (token == "\\noun") {
 474                 lex.next();
 475                 font.fontInfo().setNoun(setLyXMisc(lex.getString()));
 476         } else if (token == "\\color") {
 477                 lex.next();
 478                 setLyXColor(lex.getString(), font.fontInfo());
 479         } else if (token == "\\SpecialChar" ||
 480                    (token == "\\SpecialCharNoPassThru" &&
 481                     !par.layout().pass_thru && !inset().isPassThru())) {
 482                 auto inset = make_unique<InsetSpecialChar>();
 483                 inset->read(lex);
 484                 inset->setBuffer(*buf);
 485                 par.insertInset(par.size(), inset.release(), font, change);
 486         } else if (token == "\\SpecialCharNoPassThru") {
 487                 lex.next();
 488                 docstring const s = ltrim(lex.getDocString(), "\\");
 489                 par.insert(par.size(), s, font, change);
 490         } else if (token == "\\IPAChar") {
 491                 auto inset = make_unique<InsetIPAChar>();
 492                 inset->read(lex);
 493                 inset->setBuffer(*buf);
 494                 par.insertInset(par.size(), inset.release(), font, change);
 495         } else if (token == "\\twohyphens" || token == "\\threehyphens") {
 496                 // Ideally, this should be done by lyx2lyx, but lyx2lyx does not know the
 497                 // running font and does not know anything about layouts (and CopyStyle).
 498                 Layout const & layout(par.layout());
 499                 FontInfo info = font.fontInfo();
 500                 info.realize(layout.resfont);
 501                 if (layout.pass_thru || inset().isPassThru() ||
 502                     info.family() == TYPEWRITER_FAMILY) {
 503                         if (token == "\\twohyphens")
 504                                 par.insert(par.size(), from_ascii("--"), font, change);
 505                         else
 506                                 par.insert(par.size(), from_ascii("---"), font, change);
 507                 } else {
 508                         if (token == "\\twohyphens")
 509                                 par.insertChar(par.size(), 0x2013, font, change);
 510                         else
 511                                 par.insertChar(par.size(), 0x2014, font, change);
 512                 }
 513         } else if (token == "\\backslash") {
 514                 par.appendChar('\\', font, change);
 515         } else if (token == "\\LyXTable") {
 516                 auto inset = make_unique<InsetTabular>(buf);
 517                 inset->read(lex);
 518                 par.insertInset(par.size(), inset.release(), font, change);
 519         } else if (token == "\\change_unchanged") {
 520                 change = Change(Change::UNCHANGED);
 521         } else if (token == "\\change_inserted" || token == "\\change_deleted") {
 522                 lex.eatLine();
 523                 istringstream is(lex.getString());
 524                 int aid;
 525                 time_t ct;
 526                 is >> aid >> ct;
 527                 BufferParams::AuthorMap const & am = bp.author_map_;
 528                 if (am.find(aid) == am.end()) {
 529                         errorList.push_back(ErrorItem(
 530                                 _("Change tracking author index missing"),
 531                                 bformat(_("A change tracking author information for index "
 532                                           "%1$d is missing. This can happen after a wrong "
 533                                           "merge by a version control system. In this case, "
 534                                           "either fix the merge, or have this information "
 535                                           "missing until the corresponding tracked changes "
 536                                           "are merged or this user edits the file again.\n"),
 537                                         aid),
 538                                 {par.id(), par.size()}, {par.id(), par.size() + 1}));
 539                         bp.addAuthor(Author(aid));
 540                 }
 541                 if (token == "\\change_inserted")
 542                         change = Change(Change::INSERTED, am.find(aid)->second, ct);
 543                 else
 544                         change = Change(Change::DELETED, am.find(aid)->second, ct);
 545         } else {
 546                 lex.eatLine();
 547                 errorList.push_back(ErrorItem(_("Unknown token"),
 548                                               bformat(_("Unknown token: %1$s %2$s\n"),
 549                                                       from_utf8(token),
 550                                                       lex.getDocString()),
 551                                               {par.id(), 0}, {par.id(), -1}));
 552         }
 553 }
 554
 555
 556 void Text::readParagraph(Paragraph & par, Lexer & lex,
 557         ErrorList & errorList)
 558 {
 559         lex.nextToken();
 560         string token = lex.getString();
 561         Font font;
 562         Change change(Change::UNCHANGED);
 563
 564         while (lex.isOK()) {
 565                 readParToken(par, lex, token, font, change, errorList);
 566
 567                 lex.nextToken();
 568                 token = lex.getString();
 569
 570                 if (token.empty())
 571                         continue;
 572
 573                 if (token == "\\end_layout") {
 574                         //Ok, paragraph finished
 575                         break;
 576                 }
 577
 578                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 579                 if (token == "\\begin_layout" || token == "\\end_document"
 580                     || token == "\\end_inset" || token == "\\begin_deeper"
 581                     || token == "\\end_deeper") {
 582                         lex.pushToken(token);
 583                         lyxerr << "Paragraph ended in line "
 584                                << lex.lineNumber() << "\n"
 585                                << "Missing \\end_layout.\n";
 586                         break;
 587                 }
 588         }
 589         // Final change goes to paragraph break:
 590         par.setChange(par.size(), change);
 591
 592         // Initialize begin_of_body_ on load; redoParagraph maintains
 593         par.setBeginOfBody();
 594
 595         // mark paragraph for spell checking on load
 596         // par.requestSpellCheck();
 597 }
 598
 599
 600 class TextCompletionList : public CompletionList
 601 {
 602 public:
 603         ///
 604         TextCompletionList(Cursor const & cur, WordList const & list)
 605                 : buffer_(cur.buffer()), list_(list)
 606         {}
 607         ///
 608         virtual ~TextCompletionList() {}
 609
 610         ///
 611         virtual bool sorted() const { return true; }
 612         ///
 613         virtual size_t size() const
 614         {
 615                 return list_.size();
 616         }
 617         ///
 618         virtual docstring const & data(size_t idx) const
 619         {
 620                 return list_.word(idx);
 621         }
 622
 623 private:
 624         ///
 625         Buffer const * buffer_;
 626         ///
 627         WordList const & list_;
 628 };
 629
 630
 631 bool Text::empty() const
 632 {
 633         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 634                 // FIXME: Should we consider the labeled type as empty too?
 635                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 636 }
 637
 638
 639 double Text::spacing(Paragraph const & par) const
 640 {
 641         if (par.params().spacing().isDefault())
 642                 return owner_->buffer().params().spacing().getValue();
 643         return par.params().spacing().getValue();
 644 }
 645
 646
 647 /**
 648  * This breaks a paragraph at the specified position.
 649  * The new paragraph will:
 650  * - Decrease depth by one (or change layout to default layout) when
 651  *    keep_layout == false
 652  * - keep current depth and layout when keep_layout == true
 653  */
 654 static void breakParagraph(Text & text, pit_type par_offset, pos_type pos,
 655                     bool keep_layout)
 656 {
 657         BufferParams const & bparams = text.inset().buffer().params();
 658         ParagraphList & pars = text.paragraphs();
 659         // create a new paragraph, and insert into the list
 660         ParagraphList::iterator tmp =
 661                 pars.insert(lyx::next(pars.begin(), par_offset + 1),
 662                             Paragraph());
 663
 664         Paragraph & par = pars[par_offset];
 665
 666         // remember to set the inset_owner
 667         tmp->setInsetOwner(&par.inInset());
 668         // without doing that we get a crash when typing <Return> at the
 669         // end of a paragraph
 670         tmp->setPlainOrDefaultLayout(bparams.documentClass());
 671
 672         if (keep_layout) {
 673                 tmp->setLayout(par.layout());
 674                 tmp->setLabelWidthString(par.params().labelWidthString());
 675                 tmp->params().depth(par.params().depth());
 676         } else if (par.params().depth() > 0) {
 677                 Paragraph const & hook = pars[text.outerHook(par_offset)];
 678                 tmp->setLayout(hook.layout());
 679                 // not sure the line below is useful
 680                 tmp->setLabelWidthString(par.params().labelWidthString());
 681                 tmp->params().depth(hook.params().depth());
 682         }
 683
 684         bool const isempty = (par.allowEmpty() && par.empty());
 685
 686         if (!isempty && (par.size() > pos || par.empty())) {
 687                 tmp->setLayout(par.layout());
 688                 tmp->params().align(par.params().align());
 689                 tmp->setLabelWidthString(par.params().labelWidthString());
 690
 691                 tmp->params().depth(par.params().depth());
 692                 tmp->params().noindent(par.params().noindent());
 693
 694                 // move everything behind the break position
 695                 // to the new paragraph
 696
 697                 /* Note: if !keepempty, empty() == true, then we reach
 698                  * here with size() == 0. So pos_end becomes - 1. This
 699                  * doesn't cause problems because both loops below
 700                  * enforce pos <= pos_end and 0 <= pos
 701                  */
 702                 pos_type pos_end = par.size() - 1;
 703
 704                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 705                         if (moveItem(par, pos, *tmp, j, bparams)) {
 706                                 ++j;
 707                         }
 708                 }
 709         }
 710
 711         // Move over the end-of-par change information
 712         tmp->setChange(tmp->size(), par.lookupChange(par.size()));
 713         par.setChange(par.size(), Change(bparams.track_changes ?
 714                                            Change::INSERTED : Change::UNCHANGED));
 715
 716         if (pos) {
 717                 // Make sure that we keep the language when
 718                 // breaking paragraph.
 719                 if (tmp->empty()) {
 720                         Font changed = tmp->getFirstFontSettings(bparams);
 721                         Font const & old = par.getFontSettings(bparams, par.size());
 722                         changed.setLanguage(old.language());
 723                         tmp->setFont(0, changed);
 724                 }
 725
 726                 return;
 727         }
 728
 729         if (!isempty) {
 730                 bool const soa = par.params().startOfAppendix();
 731                 par.params().clear();
 732                 // do not lose start of appendix marker (bug 4212)
 733                 par.params().startOfAppendix(soa);
 734                 par.setPlainOrDefaultLayout(bparams.documentClass());
 735         }
 736
 737         if (keep_layout) {
 738                 par.setLayout(tmp->layout());
 739                 par.setLabelWidthString(tmp->params().labelWidthString());
 740                 par.params().depth(tmp->params().depth());
 741         }
 742 }
 743
 744
 745 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 746 {
 747         LBUFERR(this == cur.text());
 748
 749         Paragraph & cpar = cur.paragraph();
 750         pit_type cpit = cur.pit();
 751
 752         DocumentClass const & tclass = cur.buffer()->params().documentClass();
 753         Layout const & layout = cpar.layout();
 754
 755         if (cur.lastpos() == 0 && !cpar.allowEmpty()) {
 756                 if (changeDepthAllowed(cur, DEC_DEPTH)) {
 757                         changeDepth(cur, DEC_DEPTH);
 758                         pit_type const prev = depthHook(cpit, cpar.getDepth());
 759                         docstring const & lay = pars_[prev].layout().name();
 760                         if (lay != layout.name())
 761                                 setLayout(cur, lay);
 762                 } else {
 763                         docstring const & lay = cur.paragraph().usePlainLayout()
 764                             ? tclass.plainLayoutName() : tclass.defaultLayoutName();
 765                         if (lay != layout.name())
 766                                 setLayout(cur, lay);
 767                 }
 768                 return;
 769         }
 770
 771         cur.recordUndo();
 772
 773         // Always break behind a space
 774         // It is better to erase the space (Dekel)
 775         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 776                 cpar.eraseChar(cur.pos(), cur.buffer()->params().track_changes);
 777
 778         // What should the layout for the new paragraph be?
 779         bool keep_layout = layout.isEnvironment()
 780                 || (layout.isParagraph() && layout.parbreak_is_newline);
 781         if (inverse_logic)
 782                 keep_layout = !keep_layout;
 783
 784         // We need to remember this before we break the paragraph, because
 785         // that invalidates the layout variable
 786         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 787
 788         // we need to set this before we insert the paragraph.
 789         bool const isempty = cpar.allowEmpty() && cpar.empty();
 790
 791         lyx::breakParagraph(*this, cpit, cur.pos(), keep_layout);
 792
 793         // After this, neither paragraph contains any rows!
 794
 795         cpit = cur.pit();
 796         pit_type next_par = cpit + 1;
 797
 798         // well this is the caption hack since one caption is really enough
 799         if (sensitive) {
 800                 if (cur.pos() == 0)
 801                         // set to standard-layout
 802                 //FIXME Check if this should be plainLayout() in some cases
 803                         pars_[cpit].applyLayout(tclass.defaultLayout());
 804                 else
 805                         // set to standard-layout
 806                         //FIXME Check if this should be plainLayout() in some cases
 807                         pars_[next_par].applyLayout(tclass.defaultLayout());
 808         }
 809
 810         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 811                 if (!pars_[next_par].eraseChar(0, cur.buffer()->params().track_changes))
 812                         break; // the character couldn't be deleted physically due to change tracking
 813         }
 814
 815         // A singlePar update is not enough in this case.
 816         cur.screenUpdateFlags(Update::Force);
 817         cur.forceBufferUpdate();
 818
 819         // This check is necessary. Otherwise the new empty paragraph will
 820         // be deleted automatically. And it is more friendly for the user!
 821         if (cur.pos() != 0 || isempty)
 822                 setCursor(cur, cur.pit() + 1, 0);
 823         else
 824                 setCursor(cur, cur.pit(), 0);
 825 }
 826
 827
 828 // needed to insert the selection
 829 void Text::insertStringAsLines(Cursor & cur, docstring const & str,
 830                 Font const & font)
 831 {
 832         BufferParams const & bparams = owner_->buffer().params();
 833         pit_type pit = cur.pit();
 834         pos_type pos = cur.pos();
 835
 836         // insert the string, don't insert doublespace
 837         bool space_inserted = true;
 838         for (docstring::const_iterator cit = str.begin();
 839             cit != str.end(); ++cit) {
 840                 Paragraph & par = pars_[pit];
 841                 if (*cit == '\n') {
 842                         if (inset().allowMultiPar() && (!par.empty() || par.allowEmpty())) {
 843                                 lyx::breakParagraph(*this, pit, pos,
 844                                         par.layout().isEnvironment());
 845                                 ++pit;
 846                                 pos = 0;
 847                                 space_inserted = true;
 848                         } else {
 849                                 continue;
 850                         }
 851                 // do not insert consecutive spaces if !free_spacing
 852                 } else if ((*cit == ' ' || *cit == '\t') &&
 853                            space_inserted && !par.isFreeSpacing()) {
 854                         continue;
 855                 } else if (*cit == '\t') {
 856                         if (!par.isFreeSpacing()) {
 857                                 // tabs are like spaces here
 858                                 par.insertChar(pos, ' ', font, bparams.track_changes);
 859                                 ++pos;
 860                                 space_inserted = true;
 861                         } else {
 862                                 par.insertChar(pos, *cit, font, bparams.track_changes);
 863                                 ++pos;
 864                                 space_inserted = true;
 865                         }
 866                 } else if (!isPrintable(*cit)) {
 867                         // Ignore unprintables
 868                         continue;
 869                 } else {
 870                         // just insert the character
 871                         par.insertChar(pos, *cit, font, bparams.track_changes);
 872                         ++pos;
 873                         space_inserted = (*cit == ' ');
 874                 }
 875         }
 876         setCursor(cur, pit, pos);
 877 }
 878
 879
 880 // turn double CR to single CR, others are converted into one
 881 // blank. Then insertStringAsLines is called
 882 void Text::insertStringAsParagraphs(Cursor & cur, docstring const & str,
 883                 Font const & font)
 884 {
 885         docstring linestr = str;
 886         bool newline_inserted = false;
 887
 888         for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 889                 if (linestr[i] == '\n') {
 890                         if (newline_inserted) {
 891                                 // we know that \r will be ignored by
 892                                 // insertStringAsLines. Of course, it is a dirty
 893                                 // trick, but it works...
 894                                 linestr[i - 1] = '\r';
 895                                 linestr[i] = '\n';
 896                         } else {
 897                                 linestr[i] = ' ';
 898                                 newline_inserted = true;
 899                         }
 900                 } else if (isPrintable(linestr[i])) {
 901                         newline_inserted = false;
 902                 }
 903         }
 904         insertStringAsLines(cur, linestr, font);
 905 }
 906
 907
 908 // insert a character, moves all the following breaks in the
 909 // same Paragraph one to the right and make a rebreak
 910 void Text::insertChar(Cursor & cur, char_type c)
 911 {
 912         LBUFERR(this == cur.text());
 913
 914         cur.recordUndo(INSERT_UNDO);
 915
 916         TextMetrics const & tm = cur.bv().textMetrics(this);
 917         Buffer const & buffer = *cur.buffer();
 918         Paragraph & par = cur.paragraph();
 919         // try to remove this
 920         pit_type const pit = cur.pit();
 921
 922         bool const freeSpacing = par.layout().free_spacing ||
 923                 par.isFreeSpacing();
 924
 925         if (lyxrc.auto_number) {
 926                 static docstring const number_operators = from_ascii("+-/*");
 927                 static docstring const number_unary_operators = from_ascii("+-");
 928                 static docstring const number_separators = from_ascii(".,:");
 929
 930                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 931                         if (!isDigitASCII(c) && !contains(number_operators, c) &&
 932                             !(contains(number_separators, c) &&
 933                               cur.pos() != 0 &&
 934                               cur.pos() != cur.lastpos() &&
 935                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 936                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 937                            )
 938                                 number(cur); // Set current_font.number to OFF
 939                 } else if (isDigitASCII(c) &&
 940                            cur.real_current_font.isVisibleRightToLeft()) {
 941                         number(cur); // Set current_font.number to ON
 942
 943                         if (cur.pos() != 0) {
 944                                 char_type const c = par.getChar(cur.pos() - 1);
 945                                 if (contains(number_unary_operators, c) &&
 946                                     (cur.pos() == 1
 947                                      || par.isSeparator(cur.pos() - 2)
 948                                      || par.isEnvSeparator(cur.pos() - 2)
 949                                      || par.isNewline(cur.pos() - 2))
 950                                   ) {
 951                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 952                                                 tm.font_);
 953                                 } else if (contains(number_separators, c)
 954                                      && cur.pos() >= 2
 955                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 956                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 957                                                 tm.font_);
 958                                 }
 959                         }
 960                 }
 961         }
 962
 963         // In Bidi text, we want spaces to be treated in a special way: spaces
 964         // which are between words in different languages should get the
 965         // paragraph's language; otherwise, spaces should keep the language
 966         // they were originally typed in. This is only in effect while typing;
 967         // after the text is already typed in, the user can always go back and
 968         // explicitly set the language of a space as desired. But 99.9% of the
 969         // time, what we're doing here is what the user actually meant.
 970         //
 971         // The following cases are the ones in which the language of the space
 972         // should be changed to match that of the containing paragraph. In the
 973         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 974         // represents a space, pipe (|) represents the cursor position (so the
 975         // character before it is the one just typed in). The different cases
 976         // are depicted logically (not visually), from left to right:
 977         //
 978         // 1. A_a|
 979         // 2. a_A|
 980         //
 981         // Theoretically, there are other situations that we should, perhaps, deal
 982         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 983         // point (to understand why, just try to create this situation...).
 984
 985         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 986                 // get font in front and behind the space in question. But do NOT
 987                 // use getFont(cur.pos()) because the character c is not inserted yet
 988                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 989                 Font const & post_space_font = cur.real_current_font;
 990                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 991                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 992
 993                 if (pre_space_rtl != post_space_rtl) {
 994                         // Set the space's language to match the language of the
 995                         // adjacent character whose direction is the paragraph's
 996                         // direction; don't touch other properties of the font
 997                         Language const * lang =
 998                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 999                                 pre_space_font.language() : post_space_font.language();
1000
1001                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
1002                         space_font.setLanguage(lang);
1003                         par.setFont(cur.pos() - 1, space_font);
1004                 }
1005         }
1006
1007         // Next check, if there will be two blanks together or a blank at
1008         // the beginning of a paragraph.
1009         // I decided to handle blanks like normal characters, the main
1010         // difference are the special checks when calculating the row.fill
1011         // (blank does not count at the end of a row) and the check here
1012
1013         // When the free-spacing option is set for the current layout,
1014         // disable the double-space checking
1015         if (!freeSpacing && isLineSeparatorChar(c)) {
1016                 if (cur.pos() == 0) {
1017                         cur.message(_(
1018                                         "You cannot insert a space at the "
1019                                         "beginning of a paragraph. Please read the Tutorial."));
1020                         return;
1021                 }
1022                 // LASSERT: Is it safe to continue here?
1023                 LASSERT(cur.pos() > 0, /**/);
1024                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
1025                                 && !par.isDeleted(cur.pos() - 1)) {
1026                         cur.message(_(
1027                                         "You cannot type two spaces this way. "
1028                                         "Please read the Tutorial."));
1029                         return;
1030                 }
1031         }
1032
1033         // Prevent to insert uncodable characters in verbatim and ERT
1034         // (workaround for bug 9012)
1035         // Don't do it for listings inset, since InsetListings::latex() tries
1036         // to switch to a usable encoding which works in many cases (bug 9102).
1037         if (cur.paragraph().isPassThru() && owner_->lyxCode() != LISTINGS_CODE &&
1038             cur.current_font.language()) {
1039                 Encoding const * e = cur.current_font.language()->encoding();
1040                 if (!e->encodable(c)) {
1041                         cur.message(_("Character is uncodable in verbatim paragraphs."));
1042                         return;
1043                 }
1044         }
1045
1046         pos_type pos = cur.pos();
1047         if (!cur.paragraph().isPassThru() && owner_->lyxCode() != IPA_CODE &&
1048             cur.real_current_font.fontInfo().family() != TYPEWRITER_FAMILY &&
1049             c == '-' && pos > 0) {
1050                 if (par.getChar(pos - 1) == '-') {
1051                         // convert "--" to endash
1052                         par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
1053                         c = 0x2013;
1054                         pos--;
1055                 } else if (par.getChar(pos - 1) == 0x2013) {
1056                         // convert "---" to emdash
1057                         par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
1058                         c = 0x2014;
1059                         pos--;
1060                 }
1061         }
1062
1063         par.insertChar(pos, c, cur.current_font,
1064                 cur.buffer()->params().track_changes);
1065         cur.checkBufferStructure();
1066
1067 //              cur.screenUpdateFlags(Update::Force);
1068         bool boundary = cur.boundary()
1069                 || tm.isRTLBoundary(cur.pit(), pos + 1);
1070         setCursor(cur, cur.pit(), pos + 1, false, boundary);
1071         charInserted(cur);
1072 }
1073
1074
1075 void Text::charInserted(Cursor & cur)
1076 {
1077         Paragraph & par = cur.paragraph();
1078
1079         // register word if a non-letter was entered
1080         if (cur.pos() > 1
1081             && !par.isWordSeparator(cur.pos() - 2)
1082             && par.isWordSeparator(cur.pos() - 1)) {
1083                 // get the word in front of cursor
1084                 LBUFERR(this == cur.text());
1085                 cur.paragraph().updateWords();
1086         }
1087 }
1088
1089
1090 // the cursor set functions have a special mechanism. When they
1091 // realize, that you left an empty paragraph, they will delete it.
1092
1093 bool Text::cursorForwardOneWord(Cursor & cur)
1094 {
1095         LBUFERR(this == cur.text());
1096
1097         pos_type const lastpos = cur.lastpos();
1098         pit_type pit = cur.pit();
1099         pos_type pos = cur.pos();
1100         Paragraph const & par = cur.paragraph();
1101
1102         // Paragraph boundary is a word boundary
1103         if (pos == lastpos || (pos + 1 == lastpos && par.isEnvSeparator(pos))) {
1104                 if (pit != cur.lastpit())
1105                         return setCursor(cur, pit + 1, 0);
1106                 else
1107                         return false;
1108         }
1109
1110         if (lyxrc.mac_like_cursor_movement) {
1111                 // Skip through trailing punctuation and spaces.
1112                 while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
1113                         ++pos;
1114
1115                 // Skip over either a non-char inset or a full word
1116                 if (pos != lastpos && par.isWordSeparator(pos))
1117                         ++pos;
1118                 else while (pos != lastpos && !par.isWordSeparator(pos))
1119                              ++pos;
1120         } else {
1121                 LASSERT(pos < lastpos, return false); // see above
1122                 if (!par.isWordSeparator(pos))
1123                         while (pos != lastpos && !par.isWordSeparator(pos))
1124                                 ++pos;
1125                 else if (par.isChar(pos))
1126                         while (pos != lastpos && par.isChar(pos))
1127                                 ++pos;
1128                 else if (!par.isSpace(pos)) // non-char inset
1129                         ++pos;
1130
1131                 // Skip over white space
1132                 while (pos != lastpos && par.isSpace(pos))
1133                              ++pos;
1134         }
1135
1136         // Don't skip a separator inset at the end of a paragraph
1137         if (pos == lastpos && pos && par.isEnvSeparator(pos - 1))
1138                 --pos;
1139
1140         return setCursor(cur, pit, pos);
1141 }
1142
1143
1144 bool Text::cursorBackwardOneWord(Cursor & cur)
1145 {
1146         LBUFERR(this == cur.text());
1147
1148         pit_type pit = cur.pit();
1149         pos_type pos = cur.pos();
1150         Paragraph & par = cur.paragraph();
1151
1152         // Paragraph boundary is a word boundary
1153         if (pos == 0 && pit != 0) {
1154                 Paragraph & prevpar = getPar(pit - 1);
1155                 pos = prevpar.size();
1156                 // Don't stop after an environment separator
1157                 if (pos && prevpar.isEnvSeparator(pos - 1))
1158                         --pos;
1159                 return setCursor(cur, pit - 1, pos);
1160         }
1161
1162         if (lyxrc.mac_like_cursor_movement) {
1163                 // Skip through punctuation and spaces.
1164                 while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
1165                         --pos;
1166
1167                 // Skip over either a non-char inset or a full word
1168                 if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
1169                         --pos;
1170                 else while (pos != 0 && !par.isWordSeparator(pos - 1))
1171                              --pos;
1172         } else {
1173                 // Skip over white space
1174                 while (pos != 0 && par.isSpace(pos - 1))
1175                              --pos;
1176
1177                 if (pos != 0 && !par.isWordSeparator(pos - 1))
1178                         while (pos != 0 && !par.isWordSeparator(pos - 1))
1179                                 --pos;
1180                 else if (pos != 0 && par.isChar(pos - 1))
1181                         while (pos != 0 && par.isChar(pos - 1))
1182                                 --pos;
1183                 else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
1184                         --pos;
1185         }
1186
1187         return setCursor(cur, pit, pos);
1188 }
1189
1190
1191 bool Text::cursorVisLeftOneWord(Cursor & cur)
1192 {
1193         LBUFERR(this == cur.text());
1194
1195         pos_type left_pos, right_pos;
1196
1197         Cursor temp_cur = cur;
1198
1199         // always try to move at least once...
1200         while (temp_cur.posVisLeft(true /* skip_inset */)) {
1201
1202                 // collect some information about current cursor position
1203                 temp_cur.getSurroundingPos(left_pos, right_pos);
1204                 bool left_is_letter =
1205                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1206                 bool right_is_letter =
1207                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1208
1209                 // if we're not at a letter/non-letter boundary, continue moving
1210                 if (left_is_letter == right_is_letter)
1211                         continue;
1212
1213                 // we should stop when we have an LTR word on our right or an RTL word
1214                 // on our left
1215                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1216                                 temp_cur.buffer()->params(), left_pos).isRightToLeft())
1217                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1218                                 temp_cur.buffer()->params(), right_pos).isRightToLeft()))
1219                         break;
1220         }
1221
1222         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1223                                          true, temp_cur.boundary());
1224 }
1225
1226
1227 bool Text::cursorVisRightOneWord(Cursor & cur)
1228 {
1229         LBUFERR(this == cur.text());
1230
1231         pos_type left_pos, right_pos;
1232
1233         Cursor temp_cur = cur;
1234
1235         // always try to move at least once...
1236         while (temp_cur.posVisRight(true /* skip_inset */)) {
1237
1238                 // collect some information about current cursor position
1239                 temp_cur.getSurroundingPos(left_pos, right_pos);
1240                 bool left_is_letter =
1241                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1242                 bool right_is_letter =
1243                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1244
1245                 // if we're not at a letter/non-letter boundary, continue moving
1246                 if (left_is_letter == right_is_letter)
1247                         continue;
1248
1249                 // we should stop when we have an LTR word on our right or an RTL word
1250                 // on our left
1251                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1252                                 temp_cur.buffer()->params(),
1253                                 left_pos).isRightToLeft())
1254                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1255                                 temp_cur.buffer()->params(),
1256                                 right_pos).isRightToLeft()))
1257                         break;
1258         }
1259
1260         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1261                                          true, temp_cur.boundary());
1262 }
1263
1264
1265 void Text::selectWord(Cursor & cur, word_location loc)
1266 {
1267         LBUFERR(this == cur.text());
1268         CursorSlice from = cur.top();
1269         CursorSlice to;
1270         getWord(from, to, loc);
1271         if (cur.top() != from)
1272                 setCursor(cur, from.pit(), from.pos());
1273         if (to == from)
1274                 return;
1275         if (!cur.selection())
1276                 cur.resetAnchor();
1277         setCursor(cur, to.pit(), to.pos());
1278         cur.setSelection();
1279         cur.setWordSelection(true);
1280 }
1281
1282
1283 void Text::selectAll(Cursor & cur)
1284 {
1285         LBUFERR(this == cur.text());
1286         if (cur.lastpos() == 0 && cur.lastpit() == 0)
1287                 return;
1288         // If the cursor is at the beginning, make sure the cursor ends there
1289         if (cur.pit() == 0 && cur.pos() == 0) {
1290                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1291                 cur.resetAnchor();
1292                 setCursor(cur, 0, 0);
1293         } else {
1294                 setCursor(cur, 0, 0);
1295                 cur.resetAnchor();
1296                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1297         }
1298         cur.setSelection();
1299 }
1300
1301
1302 // Select the word currently under the cursor when no
1303 // selection is currently set
1304 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
1305 {
1306         LBUFERR(this == cur.text());
1307         if (cur.selection())
1308                 return false;
1309         selectWord(cur, loc);
1310         return cur.selection();
1311 }
1312
1313
1314 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
1315 {
1316         LBUFERR(this == cur.text());
1317
1318         if (!cur.selection()) {
1319                 if (!selectChange(cur))
1320                         return;
1321         }
1322
1323         cur.recordUndoSelection();
1324
1325         pit_type begPit = cur.selectionBegin().pit();
1326         pit_type endPit = cur.selectionEnd().pit();
1327
1328         pos_type begPos = cur.selectionBegin().pos();
1329         pos_type endPos = cur.selectionEnd().pos();
1330
1331         // keep selection info, because endPos becomes invalid after the first loop
1332         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
1333
1334         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
1335         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1336                 pos_type parSize = pars_[pit].size();
1337
1338                 // ignore empty paragraphs; otherwise, an assertion will fail for
1339                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
1340                 if (parSize == 0)
1341                         continue;
1342
1343                 // do not consider first paragraph if the cursor starts at pos size()
1344                 if (pit == begPit && begPos == parSize)
1345                         continue;
1346
1347                 // do not consider last paragraph if the cursor ends at pos 0
1348                 if (pit == endPit && endPos == 0)
1349                         break; // last iteration anyway
1350
1351                 pos_type left  = (pit == begPit ? begPos : 0);
1352                 pos_type right = (pit == endPit ? endPos : parSize);
1353
1354                 if (left == right)
1355                         // there is no change here
1356                         continue;
1357
1358                 if (op == ACCEPT) {
1359                         pars_[pit].acceptChanges(left, right);
1360                 } else {
1361                         pars_[pit].rejectChanges(left, right);
1362                 }
1363         }
1364
1365         // next, accept/reject imaginary end-of-par characters
1366
1367         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1368                 pos_type pos = pars_[pit].size();
1369
1370                 // skip if the selection ends before the end-of-par
1371                 if (pit == endPit && endsBeforeEndOfPar)
1372                         break; // last iteration anyway
1373
1374                 // skip if this is not the last paragraph of the document
1375                 // note: the user should be able to accept/reject the par break of the last par!
1376                 if (pit == endPit && pit + 1 != int(pars_.size()))
1377                         break; // last iteration anway
1378
1379                 if (op == ACCEPT) {
1380                         if (pars_[pit].isInserted(pos)) {
1381                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1382                         } else if (pars_[pit].isDeleted(pos)) {
1383                                 if (pit + 1 == int(pars_.size())) {
1384                                         // we cannot remove a par break at the end of the last paragraph;
1385                                         // instead, we mark it unchanged
1386                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1387                                 } else {
1388                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1389                                         --endPit;
1390                                         --pit;
1391                                 }
1392                         }
1393                 } else {
1394                         if (pars_[pit].isDeleted(pos)) {
1395                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1396                         } else if (pars_[pit].isInserted(pos)) {
1397                                 if (pit + 1 == int(pars_.size())) {
1398                                         // we mark the par break at the end of the last paragraph unchanged
1399                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1400                                 } else {
1401                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1402                                         --endPit;
1403                                         --pit;
1404                                 }
1405                         }
1406                 }
1407         }
1408
1409         // finally, invoke the DEPM
1410         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().track_changes);
1411
1412         cur.finishUndo();
1413         cur.clearSelection();
1414         setCursorIntern(cur, begPit, begPos);
1415         cur.screenUpdateFlags(Update::Force);
1416         cur.forceBufferUpdate();
1417 }
1418
1419
1420 void Text::acceptChanges()
1421 {
1422         BufferParams const & bparams = owner_->buffer().params();
1423         lyx::acceptChanges(pars_, bparams);
1424         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.track_changes);
1425 }
1426
1427
1428 void Text::rejectChanges()
1429 {
1430         BufferParams const & bparams = owner_->buffer().params();
1431         pit_type pars_size = static_cast<pit_type>(pars_.size());
1432
1433         // first, reject changes within each individual paragraph
1434         // (do not consider end-of-par)
1435         for (pit_type pit = 0; pit < pars_size; ++pit) {
1436                 if (!pars_[pit].empty())   // prevent assertion failure
1437                         pars_[pit].rejectChanges(0, pars_[pit].size());
1438         }
1439
1440         // next, reject imaginary end-of-par characters
1441         for (pit_type pit = 0; pit < pars_size; ++pit) {
1442                 pos_type pos = pars_[pit].size();
1443
1444                 if (pars_[pit].isDeleted(pos)) {
1445                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1446                 } else if (pars_[pit].isInserted(pos)) {
1447                         if (pit == pars_size - 1) {
1448                                 // we mark the par break at the end of the last
1449                                 // paragraph unchanged
1450                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1451                         } else {
1452                                 mergeParagraph(bparams, pars_, pit);
1453                                 --pit;
1454                                 --pars_size;
1455                         }
1456                 }
1457         }
1458
1459         // finally, invoke the DEPM
1460         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.track_changes);
1461 }
1462
1463
1464 void Text::deleteWordForward(Cursor & cur, bool const force)
1465 {
1466         LBUFERR(this == cur.text());
1467         if (cur.lastpos() == 0)
1468                 cursorForward(cur);
1469         else {
1470                 cur.resetAnchor();
1471                 cur.selection(true);
1472                 cursorForwardOneWord(cur);
1473                 cur.setSelection();
1474                 if (force || !cur.confirmDeletion()) {
1475                         cutSelection(cur, true, false);
1476                         cur.checkBufferStructure();
1477                 }
1478         }
1479 }
1480
1481
1482 void Text::deleteWordBackward(Cursor & cur, bool const force)
1483 {
1484         LBUFERR(this == cur.text());
1485         if (cur.lastpos() == 0)
1486                 cursorBackward(cur);
1487         else {
1488                 cur.resetAnchor();
1489                 cur.selection(true);
1490                 cursorBackwardOneWord(cur);
1491                 cur.setSelection();
1492                 if (force || !cur.confirmDeletion()) {
1493                         cutSelection(cur, true, false);
1494                         cur.checkBufferStructure();
1495                 }
1496         }
1497 }
1498
1499
1500 // Kill to end of line.
1501 void Text::changeCase(Cursor & cur, TextCase action, bool partial)
1502 {
1503         LBUFERR(this == cur.text());
1504         CursorSlice from;
1505         CursorSlice to;
1506
1507         bool const gotsel = cur.selection();
1508         if (gotsel) {
1509                 from = cur.selBegin();
1510                 to = cur.selEnd();
1511         } else {
1512                 from = cur.top();
1513                 getWord(from, to, partial ? PARTIAL_WORD : WHOLE_WORD);
1514                 cursorForwardOneWord(cur);
1515         }
1516
1517         cur.recordUndoSelection();
1518
1519         pit_type begPit = from.pit();
1520         pit_type endPit = to.pit();
1521
1522         pos_type begPos = from.pos();
1523         pos_type endPos = to.pos();
1524
1525         pos_type right = 0; // needed after the for loop
1526
1527         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1528                 Paragraph & par = pars_[pit];
1529                 pos_type const pos = (pit == begPit ? begPos : 0);
1530                 right = (pit == endPit ? endPos : par.size());
1531                 par.changeCase(cur.buffer()->params(), pos, right, action);
1532         }
1533
1534         // the selection may have changed due to logically-only deleted chars
1535         if (gotsel) {
1536                 setCursor(cur, begPit, begPos);
1537                 cur.resetAnchor();
1538                 setCursor(cur, endPit, right);
1539                 cur.setSelection();
1540         } else
1541                 setCursor(cur, endPit, right);
1542
1543         cur.checkBufferStructure();
1544 }
1545
1546
1547 bool Text::handleBibitems(Cursor & cur)
1548 {
1549         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
1550                 return false;
1551
1552         if (cur.pos() != 0)
1553                 return false;
1554
1555         BufferParams const & bufparams = cur.buffer()->params();
1556         Paragraph const & par = cur.paragraph();
1557         Cursor prevcur = cur;
1558         if (cur.pit() > 0) {
1559                 --prevcur.pit();
1560                 prevcur.pos() = prevcur.lastpos();
1561         }
1562         Paragraph const & prevpar = prevcur.paragraph();
1563
1564         // if a bibitem is deleted, merge with previous paragraph
1565         // if this is a bibliography item as well
1566         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1567                 cur.recordUndo(prevcur.pit());
1568                 mergeParagraph(bufparams, cur.text()->paragraphs(),
1569                                                         prevcur.pit());
1570                 cur.forceBufferUpdate();
1571                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1572                 cur.screenUpdateFlags(Update::Force);
1573                 return true;
1574         }
1575
1576         // otherwise reset to default
1577         cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
1578         return true;
1579 }
1580
1581
1582 bool Text::erase(Cursor & cur)
1583 {
1584         LASSERT(this == cur.text(), return false);
1585         bool needsUpdate = false;
1586         Paragraph & par = cur.paragraph();
1587
1588         if (cur.pos() != cur.lastpos()) {
1589                 // this is the code for a normal delete, not pasting
1590                 // any paragraphs
1591                 cur.recordUndo(DELETE_UNDO);
1592                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1593                 if(!par.eraseChar(cur.pos(), cur.buffer()->params().track_changes))
1594                         // the character has been logically deleted only => skip it
1595                         cur.top().forwardPos();
1596
1597                 if (was_inset)
1598                         cur.forceBufferUpdate();
1599                 else
1600                         cur.checkBufferStructure();
1601                 needsUpdate = true;
1602         } else {
1603                 if (cur.pit() == cur.lastpit())
1604                         return dissolveInset(cur);
1605
1606                 if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().track_changes)) {
1607                         cur.recordUndo(DELETE_UNDO);
1608                         par.setChange(cur.pos(), Change(Change::DELETED));
1609                         cur.forwardPos();
1610                         needsUpdate = true;
1611                 } else {
1612                         setCursorIntern(cur, cur.pit() + 1, 0);
1613                         needsUpdate = backspacePos0(cur);
1614                 }
1615         }
1616
1617         needsUpdate |= handleBibitems(cur);
1618
1619         if (needsUpdate) {
1620                 // Make sure the cursor is correct. Is this really needed?
1621                 // No, not really... at least not here!
1622                 cur.top().setPitPos(cur.pit(), cur.pos());
1623                 cur.checkBufferStructure();
1624         }
1625
1626         return needsUpdate;
1627 }
1628
1629
1630 bool Text::backspacePos0(Cursor & cur)
1631 {
1632         LBUFERR(this == cur.text());
1633         if (cur.pit() == 0)
1634                 return false;
1635
1636         bool needsUpdate = false;
1637
1638         BufferParams const & bufparams = cur.buffer()->params();
1639         DocumentClass const & tclass = bufparams.documentClass();
1640         ParagraphList & plist = cur.text()->paragraphs();
1641         Paragraph const & par = cur.paragraph();
1642         Cursor prevcur = cur;
1643         --prevcur.pit();
1644         prevcur.pos() = prevcur.lastpos();
1645         Paragraph const & prevpar = prevcur.paragraph();
1646
1647         // is it an empty paragraph?
1648         if (cur.lastpos() == 0
1649             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1650                 cur.recordUndo(prevcur.pit());
1651                 plist.erase(lyx::next(plist.begin(), cur.pit()));
1652                 needsUpdate = true;
1653         }
1654         // is previous par empty?
1655         else if (prevcur.lastpos() == 0
1656                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1657                 cur.recordUndo(prevcur.pit());
1658                 plist.erase(lyx::next(plist.begin(), prevcur.pit()));
1659                 needsUpdate = true;
1660         }
1661         // Pasting is not allowed, if the paragraphs have different
1662         // layouts. I think it is a real bug of all other
1663         // word processors to allow it. It confuses the user.
1664         // Correction: Pasting is always allowed with standard-layout
1665         // or the empty layout.
1666         else if (par.layout() == prevpar.layout()
1667                  || tclass.isDefaultLayout(par.layout())
1668                  || tclass.isPlainLayout(par.layout())) {
1669                 cur.recordUndo(prevcur.pit());
1670                 mergeParagraph(bufparams, plist, prevcur.pit());
1671                 needsUpdate = true;
1672         }
1673
1674         if (needsUpdate) {
1675                 cur.forceBufferUpdate();
1676                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1677         }
1678
1679         return needsUpdate;
1680 }
1681
1682
1683 bool Text::backspace(Cursor & cur)
1684 {
1685         LBUFERR(this == cur.text());
1686         bool needsUpdate = false;
1687         if (cur.pos() == 0) {
1688                 if (cur.pit() == 0)
1689                         return dissolveInset(cur);
1690
1691                 Cursor prev_cur = cur;
1692                 --prev_cur.pit();
1693
1694                 if (!prev_cur.paragraph().isMergedOnEndOfParDeletion(cur.buffer()->params().track_changes)) {
1695                         cur.recordUndo(prev_cur.pit(), prev_cur.pit());
1696                         prev_cur.paragraph().setChange(prev_cur.lastpos(), Change(Change::DELETED));
1697                         setCursorIntern(cur, prev_cur.pit(), prev_cur.lastpos());
1698                         return true;
1699                 }
1700                 // The cursor is at the beginning of a paragraph, so
1701                 // the backspace will collapse two paragraphs into one.
1702                 needsUpdate = backspacePos0(cur);
1703
1704         } else {
1705                 // this is the code for a normal backspace, not pasting
1706                 // any paragraphs
1707                 cur.recordUndo(DELETE_UNDO);
1708                 // We used to do cursorBackwardIntern() here, but it is
1709                 // not a good idea since it triggers the auto-delete
1710                 // mechanism. So we do a cursorBackwardIntern()-lite,
1711                 // without the dreaded mechanism. (JMarc)
1712                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1713                                 false, cur.boundary());
1714                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1715                 cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().track_changes);
1716                 if (was_inset)
1717                         cur.forceBufferUpdate();
1718                 else
1719                         cur.checkBufferStructure();
1720         }
1721
1722         if (cur.pos() == cur.lastpos())
1723                 cur.setCurrentFont();
1724
1725         needsUpdate |= handleBibitems(cur);
1726
1727         // A singlePar update is not enough in this case.
1728 //              cur.screenUpdateFlags(Update::Force);
1729         cur.top().setPitPos(cur.pit(), cur.pos());
1730
1731         return needsUpdate;
1732 }
1733
1734
1735 bool Text::dissolveInset(Cursor & cur)
1736 {
1737         LASSERT(this == cur.text(), return false);
1738
1739         if (isMainText() || cur.inset().nargs() != 1)
1740                 return false;
1741
1742         cur.recordUndoInset();
1743         cur.setMark(false);
1744         cur.selHandle(false);
1745         // save position
1746         pos_type spos = cur.pos();
1747         pit_type spit = cur.pit();
1748         ParagraphList plist;
1749         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1750                 plist = paragraphs();
1751         cur.popBackward();
1752         // store cursor offset
1753         if (spit == 0)
1754                 spos += cur.pos();
1755         spit += cur.pit();
1756         Buffer & b = *cur.buffer();
1757         cur.paragraph().eraseChar(cur.pos(), b.params().track_changes);
1758
1759         if (!plist.empty()) {
1760                 // see bug 7319
1761                 // we clear the cache so that we won't get conflicts with labels
1762                 // that get pasted into the buffer. we should update this before
1763                 // its being empty matters. if not (i.e., if we encounter bugs),
1764                 // then this should instead be:
1765                 //        cur.buffer().updateBuffer();
1766                 // but we'll try the cheaper solution here.
1767                 cur.buffer()->clearReferenceCache();
1768
1769                 // ERT paragraphs have the Language latex_language.
1770                 // This is invalid outside of ERT, so we need to
1771                 // change it to the buffer language.
1772                 ParagraphList::iterator it = plist.begin();
1773                 ParagraphList::iterator it_end = plist.end();
1774                 for (; it != it_end; ++it)
1775                         it->changeLanguage(b.params(), latex_language, b.language());
1776
1777                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1778                                    b.errorList("Paste"));
1779                 // restore position
1780                 cur.pit() = min(cur.lastpit(), spit);
1781                 cur.pos() = min(cur.lastpos(), spos);
1782         }
1783
1784         cur.forceBufferUpdate();
1785
1786         // Ensure the current language is set correctly (bug 6292)
1787         cur.text()->setCursor(cur, cur.pit(), cur.pos());
1788         cur.clearSelection();
1789         cur.resetAnchor();
1790         return true;
1791 }
1792
1793
1794 void Text::getWord(CursorSlice & from, CursorSlice & to,
1795         word_location const loc) const
1796 {
1797         to = from;
1798         pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
1799 }
1800
1801
1802 void Text::write(ostream & os) const
1803 {
1804         Buffer const & buf = owner_->buffer();
1805         ParagraphList::const_iterator pit = paragraphs().begin();
1806         ParagraphList::const_iterator end = paragraphs().end();
1807         depth_type dth = 0;
1808         for (; pit != end; ++pit)
1809                 pit->write(os, buf.params(), dth);
1810
1811         // Close begin_deeper
1812         for(; dth > 0; --dth)
1813                 os << "\n\\end_deeper";
1814 }
1815
1816
1817 bool Text::read(Lexer & lex,
1818                 ErrorList & errorList, InsetText * insetPtr)
1819 {
1820         Buffer const & buf = owner_->buffer();
1821         depth_type depth = 0;
1822         bool res = true;
1823
1824         while (lex.isOK()) {
1825                 lex.nextToken();
1826                 string const token = lex.getString();
1827
1828                 if (token.empty())
1829                         continue;
1830
1831                 if (token == "\\end_inset")
1832                         break;
1833
1834                 if (token == "\\end_body")
1835                         continue;
1836
1837                 if (token == "\\begin_body")
1838                         continue;
1839
1840                 if (token == "\\end_document") {
1841                         res = false;
1842                         break;
1843                 }
1844
1845                 if (token == "\\begin_layout") {
1846                         lex.pushToken(token);
1847
1848                         Paragraph par;
1849                         par.setInsetOwner(insetPtr);
1850                         par.params().depth(depth);
1851                         par.setFont(0, Font(inherit_font, buf.params().language));
1852                         pars_.push_back(par);
1853                         readParagraph(pars_.back(), lex, errorList);
1854
1855                         // register the words in the global word list
1856                         pars_.back().updateWords();
1857                 } else if (token == "\\begin_deeper") {
1858                         ++depth;
1859                 } else if (token == "\\end_deeper") {
1860                         if (!depth)
1861                                 lex.printError("\\end_deeper: " "depth is already null");
1862                         else
1863                                 --depth;
1864                 } else {
1865                         LYXERR0("Handling unknown body token: `" << token << '\'');
1866                 }
1867         }
1868
1869         // avoid a crash on weird documents (bug 4859)
1870         if (pars_.empty()) {
1871                 Paragraph par;
1872                 par.setInsetOwner(insetPtr);
1873                 par.params().depth(depth);
1874                 par.setFont(0, Font(inherit_font,
1875                                     buf.params().language));
1876                 par.setPlainOrDefaultLayout(buf.params().documentClass());
1877                 pars_.push_back(par);
1878         }
1879
1880         return res;
1881 }
1882
1883
1884 // Returns the current font and depth as a message.
1885 docstring Text::currentState(Cursor const & cur) const
1886 {
1887         LBUFERR(this == cur.text());
1888         Buffer & buf = *cur.buffer();
1889         Paragraph const & par = cur.paragraph();
1890         odocstringstream os;
1891
1892         if (buf.params().track_changes)
1893                 os << _("[Change Tracking] ");
1894
1895         Change change = par.lookupChange(cur.pos());
1896
1897         if (change.changed()) {
1898                 docstring const author =
1899                         buf.params().authors().get(change.author).nameAndEmail();
1900                 docstring const date = formatted_datetime(change.changetime);
1901                 os << bformat(_("Changed by %1$s[[author]] on %2$s[[date]]. "),
1902                               author, date);
1903         }
1904
1905         // I think we should only show changes from the default
1906         // font. (Asger)
1907         // No, from the document font (MV)
1908         Font font = cur.real_current_font;
1909         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1910
1911         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1912
1913         // The paragraph depth
1914         int depth = cur.paragraph().getDepth();
1915         if (depth > 0)
1916                 os << bformat(_(", Depth: %1$d"), depth);
1917
1918         // The paragraph spacing, but only if different from
1919         // buffer spacing.
1920         Spacing const & spacing = par.params().spacing();
1921         if (!spacing.isDefault()) {
1922                 os << _(", Spacing: ");
1923                 switch (spacing.getSpace()) {
1924                 case Spacing::Single:
1925                         os << _("Single");
1926                         break;
1927                 case Spacing::Onehalf:
1928                         os << _("OneHalf");
1929                         break;
1930                 case Spacing::Double:
1931                         os << _("Double");
1932                         break;
1933                 case Spacing::Other:
1934                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1935                         break;
1936                 case Spacing::Default:
1937                         // should never happen, do nothing
1938                         break;
1939                 }
1940         }
1941
1942 #ifdef DEVEL_VERSION
1943         os << _(", Inset: ") << &cur.inset();
1944         os << _(", Paragraph: ") << cur.pit();
1945         os << _(", Id: ") << par.id();
1946         os << _(", Position: ") << cur.pos();
1947         // FIXME: Why is the check for par.size() needed?
1948         // We are called with cur.pos() == par.size() quite often.
1949         if (!par.empty() && cur.pos() < par.size()) {
1950                 // Force output of code point, not character
1951                 size_t const c = par.getChar(cur.pos());
1952                 os << _(", Char: 0x") << hex << c;
1953         }
1954         os << _(", Boundary: ") << cur.boundary();
1955 //      Row & row = cur.textRow();
1956 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1957 #endif
1958         return os.str();
1959 }
1960
1961
1962 docstring Text::getPossibleLabel(Cursor const & cur) const
1963 {
1964         pit_type pit = cur.pit();
1965
1966         Layout const * layout = &(pars_[pit].layout());
1967
1968         docstring text;
1969         docstring par_text = pars_[pit].asString();
1970
1971         // The return string of math matrices might contain linebreaks
1972         par_text = subst(par_text, '\n', '-');
1973         int const numwords = 3;
1974         for (int i = 0; i < numwords; ++i) {
1975                 if (par_text.empty())
1976                         break;
1977                 docstring head;
1978                 par_text = split(par_text, head, ' ');
1979                 // Is it legal to use spaces in labels ?
1980                 if (i > 0)
1981                         text += '-';
1982                 text += head;
1983         }
1984
1985         // Make sure it isn't too long
1986         unsigned int const max_label_length = 32;
1987         if (text.size() > max_label_length)
1988                 text.resize(max_label_length);
1989
1990         // Will contain the label prefix.
1991         docstring name;
1992
1993         // For section, subsection, etc...
1994         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1995                 Layout const * layout2 = &(pars_[pit - 1].layout());
1996                 if (layout2->latextype != LATEX_PARAGRAPH) {
1997                         --pit;
1998                         layout = layout2;
1999                 }
2000         }
2001         if (layout->latextype != LATEX_PARAGRAPH)
2002                 name = layout->refprefix;
2003
2004         // For captions, we just take the caption type
2005         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
2006         if (caption_inset) {
2007                 string const & ftype = static_cast<InsetCaption *>(caption_inset)->floattype();
2008                 FloatList const & fl = cur.buffer()->params().documentClass().floats();
2009                 if (fl.typeExist(ftype)) {
2010                         Floating const & flt = fl.getType(ftype);
2011                         name = from_utf8(flt.refPrefix());
2012                 }
2013                 if (name.empty())
2014                         name = from_utf8(ftype.substr(0,3));
2015         }
2016
2017         // If none of the above worked, see if the inset knows.
2018         if (name.empty()) {
2019                 InsetLayout const & il = cur.inset().getLayout();
2020                 name = il.refprefix();
2021         }
2022
2023         if (!name.empty())
2024                 text = name + ':' + text;
2025
2026         // We need a unique label
2027         docstring label = text;
2028         int i = 1;
2029         while (cur.buffer()->insetLabel(label)) {
2030                         label = text + '-' + convert<docstring>(i);
2031                         ++i;
2032                 }
2033
2034         return label;
2035 }
2036
2037
2038 docstring Text::asString(int options) const
2039 {
2040         return asString(0, pars_.size(), options);
2041 }
2042
2043
2044 docstring Text::asString(pit_type beg, pit_type end, int options) const
2045 {
2046         size_t i = size_t(beg);
2047         docstring str = pars_[i].asString(options);
2048         for (++i; i != size_t(end); ++i) {
2049                 str += '\n';
2050                 str += pars_[i].asString(options);
2051         }
2052         return str;
2053 }
2054
2055
2056 void Text::shortenForOutliner(docstring & str, size_t const maxlen)
2057 {
2058         support::truncateWithEllipsis(str, maxlen);
2059         for (char_type & c : str)
2060                 if (c == L'\n' || c == L'\t')
2061                         c = L' ';
2062 }
2063
2064
2065 void Text::forOutliner(docstring & os, size_t const maxlen,
2066                        bool const shorten) const
2067 {
2068         pit_type end = pars_.size() - 1;
2069         if (0 <= end && !pars_[0].labelString().empty())
2070                 os += pars_[0].labelString() + ' ';
2071         forOutliner(os, maxlen, 0, end, shorten);
2072 }
2073
2074
2075 void Text::forOutliner(docstring & os, size_t const maxlen,
2076                        pit_type pit_start, pit_type pit_end,
2077                        bool const shorten) const
2078 {
2079         size_t tmplen = shorten ? maxlen + 1 : maxlen;
2080         pit_type end = min(size_t(pit_end), pars_.size() - 1);
2081         bool first = true;
2082         for (pit_type i = pit_start; i <= end && os.length() < tmplen; ++i) {
2083                 if (!first)
2084                         os += ' ';
2085                 // This function lets the first label be treated separately
2086                 pars_[i].forOutliner(os, tmplen, false, !first);
2087                 first = false;
2088         }
2089         if (shorten)
2090                 shortenForOutliner(os, maxlen);
2091 }
2092
2093
2094 void Text::charsTranspose(Cursor & cur)
2095 {
2096         LBUFERR(this == cur.text());
2097
2098         pos_type pos = cur.pos();
2099
2100         // If cursor is at beginning or end of paragraph, do nothing.
2101         if (pos == cur.lastpos() || pos == 0)
2102                 return;
2103
2104         Paragraph & par = cur.paragraph();
2105
2106         // Get the positions of the characters to be transposed.
2107         pos_type pos1 = pos - 1;
2108         pos_type pos2 = pos;
2109
2110         // In change tracking mode, ignore deleted characters.
2111         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
2112                 ++pos2;
2113         if (pos2 == cur.lastpos())
2114                 return;
2115
2116         while (pos1 >= 0 && par.isDeleted(pos1))
2117                 --pos1;
2118         if (pos1 < 0)
2119                 return;
2120
2121         // Don't do anything if one of the "characters" is not regular text.
2122         if (par.isInset(pos1) || par.isInset(pos2))
2123                 return;
2124
2125         // Store the characters to be transposed (including font information).
2126         char_type const char1 = par.getChar(pos1);
2127         Font const font1 =
2128                 par.getFontSettings(cur.buffer()->params(), pos1);
2129
2130         char_type const char2 = par.getChar(pos2);
2131         Font const font2 =
2132                 par.getFontSettings(cur.buffer()->params(), pos2);
2133
2134         // And finally, we are ready to perform the transposition.
2135         // Track the changes if Change Tracking is enabled.
2136         bool const trackChanges = cur.buffer()->params().track_changes;
2137
2138         cur.recordUndo();
2139
2140         par.eraseChar(pos2, trackChanges);
2141         par.eraseChar(pos1, trackChanges);
2142         par.insertChar(pos1, char2, font2, trackChanges);
2143         par.insertChar(pos2, char1, font1, trackChanges);
2144
2145         cur.checkBufferStructure();
2146
2147         // After the transposition, move cursor to after the transposition.
2148         setCursor(cur, cur.pit(), pos2);
2149         cur.forwardPos();
2150 }
2151
2152
2153 DocIterator Text::macrocontextPosition() const
2154 {
2155         return macrocontext_position_;
2156 }
2157
2158
2159 void Text::setMacrocontextPosition(DocIterator const & pos)
2160 {
2161         macrocontext_position_ = pos;
2162 }
2163
2164
2165 docstring Text::previousWord(CursorSlice const & sl) const
2166 {
2167         CursorSlice from = sl;
2168         CursorSlice to = sl;
2169         getWord(from, to, PREVIOUS_WORD);
2170         if (sl == from || to == from)
2171                 return docstring();
2172
2173         Paragraph const & par = sl.paragraph();
2174         return par.asString(from.pos(), to.pos());
2175 }
2176
2177
2178 bool Text::completionSupported(Cursor const & cur) const
2179 {
2180         Paragraph const & par = cur.paragraph();
2181         return cur.pos() > 0
2182                 && (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
2183                 && !par.isWordSeparator(cur.pos() - 1);
2184 }
2185
2186
2187 CompletionList const * Text::createCompletionList(Cursor const & cur) const
2188 {
2189         WordList const & list = theWordList(cur.getFont().language()->lang());
2190         return new TextCompletionList(cur, list);
2191 }
2192
2193
2194 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
2195 {
2196         LBUFERR(cur.bv().cursor() == cur);
2197         cur.insert(s);
2198         cur.bv().cursor() = cur;
2199         if (!(cur.result().screenUpdate() & Update::Force))
2200                 cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
2201         return true;
2202 }
2203
2204
2205 docstring Text::completionPrefix(Cursor const & cur) const
2206 {
2207         return previousWord(cur.top());
2208 }
2209
2210 } // namespace lyx