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 == "\\xout") {
 468                 lex.next();
 469                 font.fontInfo().setXout(setLyXMisc(lex.getString()));
 470         } else if (token == "\\uuline") {
 471                 lex.next();
 472                 font.fontInfo().setUuline(setLyXMisc(lex.getString()));
 473         } else if (token == "\\uwave") {
 474                 lex.next();
 475                 font.fontInfo().setUwave(setLyXMisc(lex.getString()));
 476         } else if (token == "\\noun") {
 477                 lex.next();
 478                 font.fontInfo().setNoun(setLyXMisc(lex.getString()));
 479         } else if (token == "\\color") {
 480                 lex.next();
 481                 setLyXColor(lex.getString(), font.fontInfo());
 482         } else if (token == "\\SpecialChar" ||
 483                    (token == "\\SpecialCharNoPassThru" &&
 484                     !par.layout().pass_thru && !inset().isPassThru())) {
 485                 auto inset = make_unique<InsetSpecialChar>();
 486                 inset->read(lex);
 487                 inset->setBuffer(*buf);
 488                 par.insertInset(par.size(), inset.release(), font, change);
 489         } else if (token == "\\SpecialCharNoPassThru") {
 490                 lex.next();
 491                 docstring const s = ltrim(lex.getDocString(), "\\");
 492                 par.insert(par.size(), s, font, change);
 493         } else if (token == "\\IPAChar") {
 494                 auto inset = make_unique<InsetIPAChar>();
 495                 inset->read(lex);
 496                 inset->setBuffer(*buf);
 497                 par.insertInset(par.size(), inset.release(), font, change);
 498         } else if (token == "\\twohyphens" || token == "\\threehyphens") {
 499                 // Ideally, this should be done by lyx2lyx, but lyx2lyx does not know the
 500                 // running font and does not know anything about layouts (and CopyStyle).
 501                 Layout const & layout(par.layout());
 502                 FontInfo info = font.fontInfo();
 503                 info.realize(layout.resfont);
 504                 if (layout.pass_thru || inset().isPassThru() ||
 505                     info.family() == TYPEWRITER_FAMILY) {
 506                         if (token == "\\twohyphens")
 507                                 par.insert(par.size(), from_ascii("--"), font, change);
 508                         else
 509                                 par.insert(par.size(), from_ascii("---"), font, change);
 510                 } else {
 511                         if (token == "\\twohyphens")
 512                                 par.insertChar(par.size(), 0x2013, font, change);
 513                         else
 514                                 par.insertChar(par.size(), 0x2014, font, change);
 515                 }
 516         } else if (token == "\\backslash") {
 517                 par.appendChar('\\', font, change);
 518         } else if (token == "\\LyXTable") {
 519                 auto inset = make_unique<InsetTabular>(buf);
 520                 inset->read(lex);
 521                 par.insertInset(par.size(), inset.release(), font, change);
 522         } else if (token == "\\change_unchanged") {
 523                 change = Change(Change::UNCHANGED);
 524         } else if (token == "\\change_inserted" || token == "\\change_deleted") {
 525                 lex.eatLine();
 526                 istringstream is(lex.getString());
 527                 int aid;
 528                 time_t ct;
 529                 is >> aid >> ct;
 530                 BufferParams::AuthorMap const & am = bp.author_map_;
 531                 if (am.find(aid) == am.end()) {
 532                         errorList.push_back(ErrorItem(
 533                                 _("Change tracking author index missing"),
 534                                 bformat(_("A change tracking author information for index "
 535                                           "%1$d is missing. This can happen after a wrong "
 536                                           "merge by a version control system. In this case, "
 537                                           "either fix the merge, or have this information "
 538                                           "missing until the corresponding tracked changes "
 539                                           "are merged or this user edits the file again.\n"),
 540                                         aid),
 541                                 {par.id(), par.size()}, {par.id(), par.size() + 1}));
 542                         bp.addAuthor(Author(aid));
 543                 }
 544                 if (token == "\\change_inserted")
 545                         change = Change(Change::INSERTED, am.find(aid)->second, ct);
 546                 else
 547                         change = Change(Change::DELETED, am.find(aid)->second, ct);
 548         } else {
 549                 lex.eatLine();
 550                 errorList.push_back(ErrorItem(_("Unknown token"),
 551                                               bformat(_("Unknown token: %1$s %2$s\n"),
 552                                                       from_utf8(token),
 553                                                       lex.getDocString()),
 554                                               {par.id(), 0}, {par.id(), -1}));
 555         }
 556 }
 557
 558
 559 void Text::readParagraph(Paragraph & par, Lexer & lex,
 560         ErrorList & errorList)
 561 {
 562         lex.nextToken();
 563         string token = lex.getString();
 564         Font font;
 565         Change change(Change::UNCHANGED);
 566
 567         while (lex.isOK()) {
 568                 readParToken(par, lex, token, font, change, errorList);
 569
 570                 lex.nextToken();
 571                 token = lex.getString();
 572
 573                 if (token.empty())
 574                         continue;
 575
 576                 if (token == "\\end_layout") {
 577                         //Ok, paragraph finished
 578                         break;
 579                 }
 580
 581                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 582                 if (token == "\\begin_layout" || token == "\\end_document"
 583                     || token == "\\end_inset" || token == "\\begin_deeper"
 584                     || token == "\\end_deeper") {
 585                         lex.pushToken(token);
 586                         lyxerr << "Paragraph ended in line "
 587                                << lex.lineNumber() << "\n"
 588                                << "Missing \\end_layout.\n";
 589                         break;
 590                 }
 591         }
 592         // Final change goes to paragraph break:
 593         par.setChange(par.size(), change);
 594
 595         // Initialize begin_of_body_ on load; redoParagraph maintains
 596         par.setBeginOfBody();
 597
 598         // mark paragraph for spell checking on load
 599         // par.requestSpellCheck();
 600 }
 601
 602
 603 class TextCompletionList : public CompletionList
 604 {
 605 public:
 606         ///
 607         TextCompletionList(Cursor const & cur, WordList const & list)
 608                 : buffer_(cur.buffer()), list_(list)
 609         {}
 610         ///
 611         virtual ~TextCompletionList() {}
 612
 613         ///
 614         virtual bool sorted() const { return true; }
 615         ///
 616         virtual size_t size() const
 617         {
 618                 return list_.size();
 619         }
 620         ///
 621         virtual docstring const & data(size_t idx) const
 622         {
 623                 return list_.word(idx);
 624         }
 625
 626 private:
 627         ///
 628         Buffer const * buffer_;
 629         ///
 630         WordList const & list_;
 631 };
 632
 633
 634 bool Text::empty() const
 635 {
 636         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 637                 // FIXME: Should we consider the labeled type as empty too?
 638                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 639 }
 640
 641
 642 double Text::spacing(Paragraph const & par) const
 643 {
 644         if (par.params().spacing().isDefault())
 645                 return owner_->buffer().params().spacing().getValue();
 646         return par.params().spacing().getValue();
 647 }
 648
 649
 650 /**
 651  * This breaks a paragraph at the specified position.
 652  * The new paragraph will:
 653  * - Decrease depth by one (or change layout to default layout) when
 654  *    keep_layout == false
 655  * - keep current depth and layout when keep_layout == true
 656  */
 657 static void breakParagraph(Text & text, pit_type par_offset, pos_type pos,
 658                     bool keep_layout)
 659 {
 660         BufferParams const & bparams = text.inset().buffer().params();
 661         ParagraphList & pars = text.paragraphs();
 662         // create a new paragraph, and insert into the list
 663         ParagraphList::iterator tmp =
 664                 pars.insert(lyx::next(pars.begin(), par_offset + 1),
 665                             Paragraph());
 666
 667         Paragraph & par = pars[par_offset];
 668
 669         // remember to set the inset_owner
 670         tmp->setInsetOwner(&par.inInset());
 671         // without doing that we get a crash when typing <Return> at the
 672         // end of a paragraph
 673         tmp->setPlainOrDefaultLayout(bparams.documentClass());
 674
 675         if (keep_layout) {
 676                 tmp->setLayout(par.layout());
 677                 tmp->setLabelWidthString(par.params().labelWidthString());
 678                 tmp->params().depth(par.params().depth());
 679         } else if (par.params().depth() > 0) {
 680                 Paragraph const & hook = pars[text.outerHook(par_offset)];
 681                 tmp->setLayout(hook.layout());
 682                 // not sure the line below is useful
 683                 tmp->setLabelWidthString(par.params().labelWidthString());
 684                 tmp->params().depth(hook.params().depth());
 685         }
 686
 687         bool const isempty = (par.allowEmpty() && par.empty());
 688
 689         if (!isempty && (par.size() > pos || par.empty())) {
 690                 tmp->setLayout(par.layout());
 691                 tmp->params().align(par.params().align());
 692                 tmp->setLabelWidthString(par.params().labelWidthString());
 693
 694                 tmp->params().depth(par.params().depth());
 695                 tmp->params().noindent(par.params().noindent());
 696
 697                 // move everything behind the break position
 698                 // to the new paragraph
 699
 700                 /* Note: if !keepempty, empty() == true, then we reach
 701                  * here with size() == 0. So pos_end becomes - 1. This
 702                  * doesn't cause problems because both loops below
 703                  * enforce pos <= pos_end and 0 <= pos
 704                  */
 705                 pos_type pos_end = par.size() - 1;
 706
 707                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 708                         if (moveItem(par, pos, *tmp, j, bparams)) {
 709                                 ++j;
 710                         }
 711                 }
 712         }
 713
 714         // Move over the end-of-par change information
 715         tmp->setChange(tmp->size(), par.lookupChange(par.size()));
 716         par.setChange(par.size(), Change(bparams.track_changes ?
 717                                            Change::INSERTED : Change::UNCHANGED));
 718
 719         if (pos) {
 720                 // Make sure that we keep the language when
 721                 // breaking paragraph.
 722                 if (tmp->empty()) {
 723                         Font changed = tmp->getFirstFontSettings(bparams);
 724                         Font const & old = par.getFontSettings(bparams, par.size());
 725                         changed.setLanguage(old.language());
 726                         tmp->setFont(0, changed);
 727                 }
 728
 729                 return;
 730         }
 731
 732         if (!isempty) {
 733                 bool const soa = par.params().startOfAppendix();
 734                 par.params().clear();
 735                 // do not lose start of appendix marker (bug 4212)
 736                 par.params().startOfAppendix(soa);
 737                 par.setPlainOrDefaultLayout(bparams.documentClass());
 738         }
 739
 740         if (keep_layout) {
 741                 par.setLayout(tmp->layout());
 742                 par.setLabelWidthString(tmp->params().labelWidthString());
 743                 par.params().depth(tmp->params().depth());
 744         }
 745 }
 746
 747
 748 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 749 {
 750         LBUFERR(this == cur.text());
 751
 752         Paragraph & cpar = cur.paragraph();
 753         pit_type cpit = cur.pit();
 754
 755         DocumentClass const & tclass = cur.buffer()->params().documentClass();
 756         Layout const & layout = cpar.layout();
 757
 758         if (cur.lastpos() == 0 && !cpar.allowEmpty()) {
 759                 if (changeDepthAllowed(cur, DEC_DEPTH)) {
 760                         changeDepth(cur, DEC_DEPTH);
 761                         pit_type const prev = depthHook(cpit, cpar.getDepth());
 762                         docstring const & lay = pars_[prev].layout().name();
 763                         if (lay != layout.name())
 764                                 setLayout(cur, lay);
 765                 } else {
 766                         docstring const & lay = cur.paragraph().usePlainLayout()
 767                             ? tclass.plainLayoutName() : tclass.defaultLayoutName();
 768                         if (lay != layout.name())
 769                                 setLayout(cur, lay);
 770                 }
 771                 return;
 772         }
 773
 774         cur.recordUndo();
 775
 776         // Always break behind a space
 777         // It is better to erase the space (Dekel)
 778         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 779                 cpar.eraseChar(cur.pos(), cur.buffer()->params().track_changes);
 780
 781         // What should the layout for the new paragraph be?
 782         bool keep_layout = layout.isEnvironment()
 783                 || (layout.isParagraph() && layout.parbreak_is_newline);
 784         if (inverse_logic)
 785                 keep_layout = !keep_layout;
 786
 787         // We need to remember this before we break the paragraph, because
 788         // that invalidates the layout variable
 789         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 790
 791         // we need to set this before we insert the paragraph.
 792         bool const isempty = cpar.allowEmpty() && cpar.empty();
 793
 794         lyx::breakParagraph(*this, cpit, cur.pos(), keep_layout);
 795
 796         // After this, neither paragraph contains any rows!
 797
 798         cpit = cur.pit();
 799         pit_type next_par = cpit + 1;
 800
 801         // well this is the caption hack since one caption is really enough
 802         if (sensitive) {
 803                 if (cur.pos() == 0)
 804                         // set to standard-layout
 805                 //FIXME Check if this should be plainLayout() in some cases
 806                         pars_[cpit].applyLayout(tclass.defaultLayout());
 807                 else
 808                         // set to standard-layout
 809                         //FIXME Check if this should be plainLayout() in some cases
 810                         pars_[next_par].applyLayout(tclass.defaultLayout());
 811         }
 812
 813         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 814                 if (!pars_[next_par].eraseChar(0, cur.buffer()->params().track_changes))
 815                         break; // the character couldn't be deleted physically due to change tracking
 816         }
 817
 818         // A singlePar update is not enough in this case.
 819         cur.screenUpdateFlags(Update::Force);
 820         cur.forceBufferUpdate();
 821
 822         // This check is necessary. Otherwise the new empty paragraph will
 823         // be deleted automatically. And it is more friendly for the user!
 824         if (cur.pos() != 0 || isempty)
 825                 setCursor(cur, cur.pit() + 1, 0);
 826         else
 827                 setCursor(cur, cur.pit(), 0);
 828 }
 829
 830
 831 // needed to insert the selection
 832 void Text::insertStringAsLines(Cursor & cur, docstring const & str,
 833                 Font const & font)
 834 {
 835         BufferParams const & bparams = owner_->buffer().params();
 836         pit_type pit = cur.pit();
 837         pos_type pos = cur.pos();
 838
 839         // insert the string, don't insert doublespace
 840         bool space_inserted = true;
 841         for (docstring::const_iterator cit = str.begin();
 842             cit != str.end(); ++cit) {
 843                 Paragraph & par = pars_[pit];
 844                 if (*cit == '\n') {
 845                         if (inset().allowMultiPar() && (!par.empty() || par.allowEmpty())) {
 846                                 lyx::breakParagraph(*this, pit, pos,
 847                                         par.layout().isEnvironment());
 848                                 ++pit;
 849                                 pos = 0;
 850                                 space_inserted = true;
 851                         } else {
 852                                 continue;
 853                         }
 854                 // do not insert consecutive spaces if !free_spacing
 855                 } else if ((*cit == ' ' || *cit == '\t') &&
 856                            space_inserted && !par.isFreeSpacing()) {
 857                         continue;
 858                 } else if (*cit == '\t') {
 859                         if (!par.isFreeSpacing()) {
 860                                 // tabs are like spaces here
 861                                 par.insertChar(pos, ' ', font, bparams.track_changes);
 862                                 ++pos;
 863                                 space_inserted = true;
 864                         } else {
 865                                 par.insertChar(pos, *cit, font, bparams.track_changes);
 866                                 ++pos;
 867                                 space_inserted = true;
 868                         }
 869                 } else if (!isPrintable(*cit)) {
 870                         // Ignore unprintables
 871                         continue;
 872                 } else {
 873                         // just insert the character
 874                         par.insertChar(pos, *cit, font, bparams.track_changes);
 875                         ++pos;
 876                         space_inserted = (*cit == ' ');
 877                 }
 878         }
 879         setCursor(cur, pit, pos);
 880 }
 881
 882
 883 // turn double CR to single CR, others are converted into one
 884 // blank. Then insertStringAsLines is called
 885 void Text::insertStringAsParagraphs(Cursor & cur, docstring const & str,
 886                 Font const & font)
 887 {
 888         docstring linestr = str;
 889         bool newline_inserted = false;
 890
 891         for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 892                 if (linestr[i] == '\n') {
 893                         if (newline_inserted) {
 894                                 // we know that \r will be ignored by
 895                                 // insertStringAsLines. Of course, it is a dirty
 896                                 // trick, but it works...
 897                                 linestr[i - 1] = '\r';
 898                                 linestr[i] = '\n';
 899                         } else {
 900                                 linestr[i] = ' ';
 901                                 newline_inserted = true;
 902                         }
 903                 } else if (isPrintable(linestr[i])) {
 904                         newline_inserted = false;
 905                 }
 906         }
 907         insertStringAsLines(cur, linestr, font);
 908 }
 909
 910
 911 namespace {
 912
 913 bool canInsertChar(Cursor const & cur, char_type c)
 914 {
 915         Paragraph const & par = cur.paragraph();
 916         // If not in free spacing mode, check if there will be two blanks together or a blank at
 917         // the beginning of a paragraph.
 918         if (!par.isFreeSpacing() && isLineSeparatorChar(c)) {
 919                 if (cur.pos() == 0) {
 920                         cur.message(_(
 921                                         "You cannot insert a space at the "
 922                                         "beginning of a paragraph. Please read the Tutorial."));
 923                         return false;
 924                 }
 925                 // LASSERT: Is it safe to continue here?
 926                 LASSERT(cur.pos() > 0, /**/);
 927                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 928                                 && !par.isDeleted(cur.pos() - 1)) {
 929                         cur.message(_(
 930                                         "You cannot type two spaces this way. "
 931                                         "Please read the Tutorial."));
 932                         return false;
 933                 }
 934         }
 935
 936         // Prevent to insert uncodable characters in verbatim and ERT.
 937         // The encoding is inherited from the context here.
 938         if (par.isPassThru() && cur.getEncoding()) {
 939                 Encoding const * e = cur.getEncoding();
 940                 if (!e->encodable(c)) {
 941                         cur.message(_("Character is uncodable in this verbatim context."));
 942                         return false;
 943                 }
 944         }
 945         return true;
 946 }
 947
 948 } // namespace
 949
 950
 951 // insert a character, moves all the following breaks in the
 952 // same Paragraph one to the right and make a rebreak
 953 void Text::insertChar(Cursor & cur, char_type c)
 954 {
 955         LBUFERR(this == cur.text());
 956
 957         if (!canInsertChar(cur,c))
 958                 return;
 959
 960         cur.recordUndo(INSERT_UNDO);
 961
 962         TextMetrics const & tm = cur.bv().textMetrics(this);
 963         Buffer const & buffer = *cur.buffer();
 964         Paragraph & par = cur.paragraph();
 965         // try to remove this
 966         pit_type const pit = cur.pit();
 967
 968         if (lyxrc.auto_number) {
 969                 static docstring const number_operators = from_ascii("+-/*");
 970                 static docstring const number_unary_operators = from_ascii("+-");
 971                 static docstring const number_separators = from_ascii(".,:");
 972
 973                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 974                         if (!isDigitASCII(c) && !contains(number_operators, c) &&
 975                             !(contains(number_separators, c) &&
 976                               cur.pos() != 0 &&
 977                               cur.pos() != cur.lastpos() &&
 978                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 979                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 980                            )
 981                                 number(cur); // Set current_font.number to OFF
 982                 } else if (isDigitASCII(c) &&
 983                            cur.real_current_font.isVisibleRightToLeft()) {
 984                         number(cur); // Set current_font.number to ON
 985
 986                         if (cur.pos() != 0) {
 987                                 char_type const ch = par.getChar(cur.pos() - 1);
 988                                 if (contains(number_unary_operators, ch) &&
 989                                     (cur.pos() == 1
 990                                      || par.isSeparator(cur.pos() - 2)
 991                                      || par.isEnvSeparator(cur.pos() - 2)
 992                                      || par.isNewline(cur.pos() - 2))
 993                                   ) {
 994                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 995                                                 tm.font_);
 996                                 } else if (contains(number_separators, ch)
 997                                      && cur.pos() >= 2
 998                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 999                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
1000                                                 tm.font_);
1001                                 }
1002                         }
1003                 }
1004         }
1005
1006         // In Bidi text, we want spaces to be treated in a special way: spaces
1007         // which are between words in different languages should get the
1008         // paragraph's language; otherwise, spaces should keep the language
1009         // they were originally typed in. This is only in effect while typing;
1010         // after the text is already typed in, the user can always go back and
1011         // explicitly set the language of a space as desired. But 99.9% of the
1012         // time, what we're doing here is what the user actually meant.
1013         //
1014         // The following cases are the ones in which the language of the space
1015         // should be changed to match that of the containing paragraph. In the
1016         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
1017         // represents a space, pipe (|) represents the cursor position (so the
1018         // character before it is the one just typed in). The different cases
1019         // are depicted logically (not visually), from left to right:
1020         //
1021         // 1. A_a|
1022         // 2. a_A|
1023         //
1024         // Theoretically, there are other situations that we should, perhaps, deal
1025         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
1026         // point (to understand why, just try to create this situation...).
1027
1028         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
1029                 // get font in front and behind the space in question. But do NOT
1030                 // use getFont(cur.pos()) because the character c is not inserted yet
1031                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
1032                 Font const & post_space_font = cur.real_current_font;
1033                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
1034                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
1035
1036                 if (pre_space_rtl != post_space_rtl) {
1037                         // Set the space's language to match the language of the
1038                         // adjacent character whose direction is the paragraph's
1039                         // direction; don't touch other properties of the font
1040                         Language const * lang =
1041                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
1042                                 pre_space_font.language() : post_space_font.language();
1043
1044                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
1045                         space_font.setLanguage(lang);
1046                         par.setFont(cur.pos() - 1, space_font);
1047                 }
1048         }
1049
1050         pos_type pos = cur.pos();
1051         if (!cur.paragraph().isPassThru() && owner_->lyxCode() != IPA_CODE &&
1052             cur.real_current_font.fontInfo().family() != TYPEWRITER_FAMILY &&
1053             c == '-' && pos > 0) {
1054                 if (par.getChar(pos - 1) == '-') {
1055                         // convert "--" to endash
1056                         par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
1057                         c = 0x2013;
1058                         pos--;
1059                 } else if (par.getChar(pos - 1) == 0x2013) {
1060                         // convert "---" to emdash
1061                         par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
1062                         c = 0x2014;
1063                         pos--;
1064                 }
1065         }
1066
1067         par.insertChar(pos, c, cur.current_font,
1068                 cur.buffer()->params().track_changes);
1069         cur.checkBufferStructure();
1070
1071 //              cur.screenUpdateFlags(Update::Force);
1072         bool boundary = cur.boundary()
1073                 || tm.isRTLBoundary(cur.pit(), pos + 1);
1074         setCursor(cur, cur.pit(), pos + 1, false, boundary);
1075         charInserted(cur);
1076 }
1077
1078
1079 void Text::charInserted(Cursor & cur)
1080 {
1081         Paragraph & par = cur.paragraph();
1082
1083         // register word if a non-letter was entered
1084         if (cur.pos() > 1
1085             && !par.isWordSeparator(cur.pos() - 2)
1086             && par.isWordSeparator(cur.pos() - 1)) {
1087                 // get the word in front of cursor
1088                 LBUFERR(this == cur.text());
1089                 cur.paragraph().updateWords();
1090         }
1091 }
1092
1093
1094 // the cursor set functions have a special mechanism. When they
1095 // realize, that you left an empty paragraph, they will delete it.
1096
1097 bool Text::cursorForwardOneWord(Cursor & cur)
1098 {
1099         LBUFERR(this == cur.text());
1100
1101         pos_type const lastpos = cur.lastpos();
1102         pit_type pit = cur.pit();
1103         pos_type pos = cur.pos();
1104         Paragraph const & par = cur.paragraph();
1105
1106         // Paragraph boundary is a word boundary
1107         if (pos == lastpos || (pos + 1 == lastpos && par.isEnvSeparator(pos))) {
1108                 if (pit != cur.lastpit())
1109                         return setCursor(cur, pit + 1, 0);
1110                 else
1111                         return false;
1112         }
1113
1114         if (lyxrc.mac_like_cursor_movement) {
1115                 // Skip through trailing punctuation and spaces.
1116                 while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
1117                         ++pos;
1118
1119                 // Skip over either a non-char inset or a full word
1120                 if (pos != lastpos && par.isWordSeparator(pos))
1121                         ++pos;
1122                 else while (pos != lastpos && !par.isWordSeparator(pos))
1123                              ++pos;
1124         } else {
1125                 LASSERT(pos < lastpos, return false); // see above
1126                 if (!par.isWordSeparator(pos))
1127                         while (pos != lastpos && !par.isWordSeparator(pos))
1128                                 ++pos;
1129                 else if (par.isChar(pos))
1130                         while (pos != lastpos && par.isChar(pos))
1131                                 ++pos;
1132                 else if (!par.isSpace(pos)) // non-char inset
1133                         ++pos;
1134
1135                 // Skip over white space
1136                 while (pos != lastpos && par.isSpace(pos))
1137                              ++pos;
1138         }
1139
1140         // Don't skip a separator inset at the end of a paragraph
1141         if (pos == lastpos && pos && par.isEnvSeparator(pos - 1))
1142                 --pos;
1143
1144         return setCursor(cur, pit, pos);
1145 }
1146
1147
1148 bool Text::cursorBackwardOneWord(Cursor & cur)
1149 {
1150         LBUFERR(this == cur.text());
1151
1152         pit_type pit = cur.pit();
1153         pos_type pos = cur.pos();
1154         Paragraph & par = cur.paragraph();
1155
1156         // Paragraph boundary is a word boundary
1157         if (pos == 0 && pit != 0) {
1158                 Paragraph & prevpar = getPar(pit - 1);
1159                 pos = prevpar.size();
1160                 // Don't stop after an environment separator
1161                 if (pos && prevpar.isEnvSeparator(pos - 1))
1162                         --pos;
1163                 return setCursor(cur, pit - 1, pos);
1164         }
1165
1166         if (lyxrc.mac_like_cursor_movement) {
1167                 // Skip through punctuation and spaces.
1168                 while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
1169                         --pos;
1170
1171                 // Skip over either a non-char inset or a full word
1172                 if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
1173                         --pos;
1174                 else while (pos != 0 && !par.isWordSeparator(pos - 1))
1175                              --pos;
1176         } else {
1177                 // Skip over white space
1178                 while (pos != 0 && par.isSpace(pos - 1))
1179                              --pos;
1180
1181                 if (pos != 0 && !par.isWordSeparator(pos - 1))
1182                         while (pos != 0 && !par.isWordSeparator(pos - 1))
1183                                 --pos;
1184                 else if (pos != 0 && par.isChar(pos - 1))
1185                         while (pos != 0 && par.isChar(pos - 1))
1186                                 --pos;
1187                 else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
1188                         --pos;
1189         }
1190
1191         return setCursor(cur, pit, pos);
1192 }
1193
1194
1195 bool Text::cursorVisLeftOneWord(Cursor & cur)
1196 {
1197         LBUFERR(this == cur.text());
1198
1199         pos_type left_pos, right_pos;
1200
1201         Cursor temp_cur = cur;
1202
1203         // always try to move at least once...
1204         while (temp_cur.posVisLeft(true /* skip_inset */)) {
1205
1206                 // collect some information about current cursor position
1207                 temp_cur.getSurroundingPos(left_pos, right_pos);
1208                 bool left_is_letter =
1209                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1210                 bool right_is_letter =
1211                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1212
1213                 // if we're not at a letter/non-letter boundary, continue moving
1214                 if (left_is_letter == right_is_letter)
1215                         continue;
1216
1217                 // we should stop when we have an LTR word on our right or an RTL word
1218                 // on our left
1219                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1220                                 temp_cur.buffer()->params(), left_pos).isRightToLeft())
1221                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1222                                 temp_cur.buffer()->params(), right_pos).isRightToLeft()))
1223                         break;
1224         }
1225
1226         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1227                                          true, temp_cur.boundary());
1228 }
1229
1230
1231 bool Text::cursorVisRightOneWord(Cursor & cur)
1232 {
1233         LBUFERR(this == cur.text());
1234
1235         pos_type left_pos, right_pos;
1236
1237         Cursor temp_cur = cur;
1238
1239         // always try to move at least once...
1240         while (temp_cur.posVisRight(true /* skip_inset */)) {
1241
1242                 // collect some information about current cursor position
1243                 temp_cur.getSurroundingPos(left_pos, right_pos);
1244                 bool left_is_letter =
1245                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1246                 bool right_is_letter =
1247                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1248
1249                 // if we're not at a letter/non-letter boundary, continue moving
1250                 if (left_is_letter == right_is_letter)
1251                         continue;
1252
1253                 // we should stop when we have an LTR word on our right or an RTL word
1254                 // on our left
1255                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1256                                 temp_cur.buffer()->params(),
1257                                 left_pos).isRightToLeft())
1258                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1259                                 temp_cur.buffer()->params(),
1260                                 right_pos).isRightToLeft()))
1261                         break;
1262         }
1263
1264         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1265                                          true, temp_cur.boundary());
1266 }
1267
1268
1269 void Text::selectWord(Cursor & cur, word_location loc)
1270 {
1271         LBUFERR(this == cur.text());
1272         CursorSlice from = cur.top();
1273         CursorSlice to;
1274         getWord(from, to, loc);
1275         if (cur.top() != from)
1276                 setCursor(cur, from.pit(), from.pos());
1277         if (to == from)
1278                 return;
1279         if (!cur.selection())
1280                 cur.resetAnchor();
1281         setCursor(cur, to.pit(), to.pos());
1282         cur.setSelection();
1283         cur.setWordSelection(true);
1284 }
1285
1286
1287 void Text::selectAll(Cursor & cur)
1288 {
1289         LBUFERR(this == cur.text());
1290         if (cur.lastpos() == 0 && cur.lastpit() == 0)
1291                 return;
1292         // If the cursor is at the beginning, make sure the cursor ends there
1293         if (cur.pit() == 0 && cur.pos() == 0) {
1294                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1295                 cur.resetAnchor();
1296                 setCursor(cur, 0, 0);
1297         } else {
1298                 setCursor(cur, 0, 0);
1299                 cur.resetAnchor();
1300                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1301         }
1302         cur.setSelection();
1303 }
1304
1305
1306 // Select the word currently under the cursor when no
1307 // selection is currently set
1308 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
1309 {
1310         LBUFERR(this == cur.text());
1311         if (cur.selection())
1312                 return false;
1313         selectWord(cur, loc);
1314         return cur.selection();
1315 }
1316
1317
1318 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
1319 {
1320         LBUFERR(this == cur.text());
1321
1322         if (!cur.selection()) {
1323                 if (!selectChange(cur))
1324                         return;
1325         }
1326
1327         cur.recordUndoSelection();
1328
1329         pit_type begPit = cur.selectionBegin().pit();
1330         pit_type endPit = cur.selectionEnd().pit();
1331
1332         pos_type begPos = cur.selectionBegin().pos();
1333         pos_type endPos = cur.selectionEnd().pos();
1334
1335         // keep selection info, because endPos becomes invalid after the first loop
1336         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
1337
1338         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
1339         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1340                 pos_type parSize = pars_[pit].size();
1341
1342                 // ignore empty paragraphs; otherwise, an assertion will fail for
1343                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
1344                 if (parSize == 0)
1345                         continue;
1346
1347                 // do not consider first paragraph if the cursor starts at pos size()
1348                 if (pit == begPit && begPos == parSize)
1349                         continue;
1350
1351                 // do not consider last paragraph if the cursor ends at pos 0
1352                 if (pit == endPit && endPos == 0)
1353                         break; // last iteration anyway
1354
1355                 pos_type left  = (pit == begPit ? begPos : 0);
1356                 pos_type right = (pit == endPit ? endPos : parSize);
1357
1358                 if (left == right)
1359                         // there is no change here
1360                         continue;
1361
1362                 if (op == ACCEPT) {
1363                         pars_[pit].acceptChanges(left, right);
1364                 } else {
1365                         pars_[pit].rejectChanges(left, right);
1366                 }
1367         }
1368
1369         // next, accept/reject imaginary end-of-par characters
1370
1371         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1372                 pos_type pos = pars_[pit].size();
1373
1374                 // skip if the selection ends before the end-of-par
1375                 if (pit == endPit && endsBeforeEndOfPar)
1376                         break; // last iteration anyway
1377
1378                 // skip if this is not the last paragraph of the document
1379                 // note: the user should be able to accept/reject the par break of the last par!
1380                 if (pit == endPit && pit + 1 != int(pars_.size()))
1381                         break; // last iteration anway
1382
1383                 if (op == ACCEPT) {
1384                         if (pars_[pit].isInserted(pos)) {
1385                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1386                         } else if (pars_[pit].isDeleted(pos)) {
1387                                 if (pit + 1 == int(pars_.size())) {
1388                                         // we cannot remove a par break at the end of the last paragraph;
1389                                         // instead, we mark it unchanged
1390                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1391                                 } else {
1392                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1393                                         --endPit;
1394                                         --pit;
1395                                 }
1396                         }
1397                 } else {
1398                         if (pars_[pit].isDeleted(pos)) {
1399                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1400                         } else if (pars_[pit].isInserted(pos)) {
1401                                 if (pit + 1 == int(pars_.size())) {
1402                                         // we mark the par break at the end of the last paragraph unchanged
1403                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1404                                 } else {
1405                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1406                                         --endPit;
1407                                         --pit;
1408                                 }
1409                         }
1410                 }
1411         }
1412
1413         // finally, invoke the DEPM
1414         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().track_changes);
1415
1416         cur.finishUndo();
1417         cur.clearSelection();
1418         setCursorIntern(cur, begPit, begPos);
1419         cur.screenUpdateFlags(Update::Force);
1420         cur.forceBufferUpdate();
1421 }
1422
1423
1424 void Text::acceptChanges()
1425 {
1426         BufferParams const & bparams = owner_->buffer().params();
1427         lyx::acceptChanges(pars_, bparams);
1428         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.track_changes);
1429 }
1430
1431
1432 void Text::rejectChanges()
1433 {
1434         BufferParams const & bparams = owner_->buffer().params();
1435         pit_type pars_size = static_cast<pit_type>(pars_.size());
1436
1437         // first, reject changes within each individual paragraph
1438         // (do not consider end-of-par)
1439         for (pit_type pit = 0; pit < pars_size; ++pit) {
1440                 if (!pars_[pit].empty())   // prevent assertion failure
1441                         pars_[pit].rejectChanges(0, pars_[pit].size());
1442         }
1443
1444         // next, reject imaginary end-of-par characters
1445         for (pit_type pit = 0; pit < pars_size; ++pit) {
1446                 pos_type pos = pars_[pit].size();
1447
1448                 if (pars_[pit].isDeleted(pos)) {
1449                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1450                 } else if (pars_[pit].isInserted(pos)) {
1451                         if (pit == pars_size - 1) {
1452                                 // we mark the par break at the end of the last
1453                                 // paragraph unchanged
1454                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1455                         } else {
1456                                 mergeParagraph(bparams, pars_, pit);
1457                                 --pit;
1458                                 --pars_size;
1459                         }
1460                 }
1461         }
1462
1463         // finally, invoke the DEPM
1464         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.track_changes);
1465 }
1466
1467
1468 void Text::deleteWordForward(Cursor & cur, bool const force)
1469 {
1470         LBUFERR(this == cur.text());
1471         if (cur.lastpos() == 0)
1472                 cursorForward(cur);
1473         else {
1474                 cur.resetAnchor();
1475                 cur.selection(true);
1476                 cursorForwardOneWord(cur);
1477                 cur.setSelection();
1478                 if (force || !cur.confirmDeletion()) {
1479                         cutSelection(cur, true, false);
1480                         cur.checkBufferStructure();
1481                 }
1482         }
1483 }
1484
1485
1486 void Text::deleteWordBackward(Cursor & cur, bool const force)
1487 {
1488         LBUFERR(this == cur.text());
1489         if (cur.lastpos() == 0)
1490                 cursorBackward(cur);
1491         else {
1492                 cur.resetAnchor();
1493                 cur.selection(true);
1494                 cursorBackwardOneWord(cur);
1495                 cur.setSelection();
1496                 if (force || !cur.confirmDeletion()) {
1497                         cutSelection(cur, true, false);
1498                         cur.checkBufferStructure();
1499                 }
1500         }
1501 }
1502
1503
1504 // Kill to end of line.
1505 void Text::changeCase(Cursor & cur, TextCase action, bool partial)
1506 {
1507         LBUFERR(this == cur.text());
1508         CursorSlice from;
1509         CursorSlice to;
1510
1511         bool const gotsel = cur.selection();
1512         if (gotsel) {
1513                 from = cur.selBegin();
1514                 to = cur.selEnd();
1515         } else {
1516                 from = cur.top();
1517                 getWord(from, to, partial ? PARTIAL_WORD : WHOLE_WORD);
1518                 cursorForwardOneWord(cur);
1519         }
1520
1521         cur.recordUndoSelection();
1522
1523         pit_type begPit = from.pit();
1524         pit_type endPit = to.pit();
1525
1526         pos_type begPos = from.pos();
1527         pos_type endPos = to.pos();
1528
1529         pos_type right = 0; // needed after the for loop
1530
1531         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1532                 Paragraph & par = pars_[pit];
1533                 pos_type const pos = (pit == begPit ? begPos : 0);
1534                 right = (pit == endPit ? endPos : par.size());
1535                 par.changeCase(cur.buffer()->params(), pos, right, action);
1536         }
1537
1538         // the selection may have changed due to logically-only deleted chars
1539         if (gotsel) {
1540                 setCursor(cur, begPit, begPos);
1541                 cur.resetAnchor();
1542                 setCursor(cur, endPit, right);
1543                 cur.setSelection();
1544         } else
1545                 setCursor(cur, endPit, right);
1546
1547         cur.checkBufferStructure();
1548 }
1549
1550
1551 bool Text::handleBibitems(Cursor & cur)
1552 {
1553         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
1554                 return false;
1555
1556         if (cur.pos() != 0)
1557                 return false;
1558
1559         BufferParams const & bufparams = cur.buffer()->params();
1560         Paragraph const & par = cur.paragraph();
1561         Cursor prevcur = cur;
1562         if (cur.pit() > 0) {
1563                 --prevcur.pit();
1564                 prevcur.pos() = prevcur.lastpos();
1565         }
1566         Paragraph const & prevpar = prevcur.paragraph();
1567
1568         // if a bibitem is deleted, merge with previous paragraph
1569         // if this is a bibliography item as well
1570         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1571                 cur.recordUndo(prevcur.pit());
1572                 mergeParagraph(bufparams, cur.text()->paragraphs(),
1573                                                         prevcur.pit());
1574                 cur.forceBufferUpdate();
1575                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1576                 cur.screenUpdateFlags(Update::Force);
1577                 return true;
1578         }
1579
1580         // otherwise reset to default
1581         cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
1582         return true;
1583 }
1584
1585
1586 bool Text::erase(Cursor & cur)
1587 {
1588         LASSERT(this == cur.text(), return false);
1589         bool needsUpdate = false;
1590         Paragraph & par = cur.paragraph();
1591
1592         if (cur.pos() != cur.lastpos()) {
1593                 // this is the code for a normal delete, not pasting
1594                 // any paragraphs
1595                 cur.recordUndo(DELETE_UNDO);
1596                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1597                 if(!par.eraseChar(cur.pos(), cur.buffer()->params().track_changes))
1598                         // the character has been logically deleted only => skip it
1599                         cur.top().forwardPos();
1600
1601                 if (was_inset)
1602                         cur.forceBufferUpdate();
1603                 else
1604                         cur.checkBufferStructure();
1605                 needsUpdate = true;
1606         } else {
1607                 if (cur.pit() == cur.lastpit())
1608                         return dissolveInset(cur);
1609
1610                 if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().track_changes)) {
1611                         cur.recordUndo(DELETE_UNDO);
1612                         par.setChange(cur.pos(), Change(Change::DELETED));
1613                         cur.forwardPos();
1614                         needsUpdate = true;
1615                 } else {
1616                         setCursorIntern(cur, cur.pit() + 1, 0);
1617                         needsUpdate = backspacePos0(cur);
1618                 }
1619         }
1620
1621         needsUpdate |= handleBibitems(cur);
1622
1623         if (needsUpdate) {
1624                 // Make sure the cursor is correct. Is this really needed?
1625                 // No, not really... at least not here!
1626                 cur.top().setPitPos(cur.pit(), cur.pos());
1627                 cur.checkBufferStructure();
1628         }
1629
1630         return needsUpdate;
1631 }
1632
1633
1634 bool Text::backspacePos0(Cursor & cur)
1635 {
1636         LBUFERR(this == cur.text());
1637         if (cur.pit() == 0)
1638                 return false;
1639
1640         bool needsUpdate = false;
1641
1642         BufferParams const & bufparams = cur.buffer()->params();
1643         DocumentClass const & tclass = bufparams.documentClass();
1644         ParagraphList & plist = cur.text()->paragraphs();
1645         Paragraph const & par = cur.paragraph();
1646         Cursor prevcur = cur;
1647         --prevcur.pit();
1648         prevcur.pos() = prevcur.lastpos();
1649         Paragraph const & prevpar = prevcur.paragraph();
1650
1651         // is it an empty paragraph?
1652         if (cur.lastpos() == 0
1653             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1654                 cur.recordUndo(prevcur.pit());
1655                 plist.erase(lyx::next(plist.begin(), cur.pit()));
1656                 needsUpdate = true;
1657         }
1658         // is previous par empty?
1659         else if (prevcur.lastpos() == 0
1660                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1661                 cur.recordUndo(prevcur.pit());
1662                 plist.erase(lyx::next(plist.begin(), prevcur.pit()));
1663                 needsUpdate = true;
1664         }
1665         // Pasting is not allowed, if the paragraphs have different
1666         // layouts. I think it is a real bug of all other
1667         // word processors to allow it. It confuses the user.
1668         // Correction: Pasting is always allowed with standard-layout
1669         // or the empty layout.
1670         else if (par.layout() == prevpar.layout()
1671                  || tclass.isDefaultLayout(par.layout())
1672                  || tclass.isPlainLayout(par.layout())) {
1673                 cur.recordUndo(prevcur.pit());
1674                 mergeParagraph(bufparams, plist, prevcur.pit());
1675                 needsUpdate = true;
1676         }
1677
1678         if (needsUpdate) {
1679                 cur.forceBufferUpdate();
1680                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1681         }
1682
1683         return needsUpdate;
1684 }
1685
1686
1687 bool Text::backspace(Cursor & cur)
1688 {
1689         LBUFERR(this == cur.text());
1690         bool needsUpdate = false;
1691         if (cur.pos() == 0) {
1692                 if (cur.pit() == 0)
1693                         return dissolveInset(cur);
1694
1695                 Cursor prev_cur = cur;
1696                 --prev_cur.pit();
1697
1698                 if (!prev_cur.paragraph().isMergedOnEndOfParDeletion(cur.buffer()->params().track_changes)) {
1699                         cur.recordUndo(prev_cur.pit(), prev_cur.pit());
1700                         prev_cur.paragraph().setChange(prev_cur.lastpos(), Change(Change::DELETED));
1701                         setCursorIntern(cur, prev_cur.pit(), prev_cur.lastpos());
1702                         return true;
1703                 }
1704                 // The cursor is at the beginning of a paragraph, so
1705                 // the backspace will collapse two paragraphs into one.
1706                 needsUpdate = backspacePos0(cur);
1707
1708         } else {
1709                 // this is the code for a normal backspace, not pasting
1710                 // any paragraphs
1711                 cur.recordUndo(DELETE_UNDO);
1712                 // We used to do cursorBackwardIntern() here, but it is
1713                 // not a good idea since it triggers the auto-delete
1714                 // mechanism. So we do a cursorBackwardIntern()-lite,
1715                 // without the dreaded mechanism. (JMarc)
1716                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1717                                 false, cur.boundary());
1718                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1719                 cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().track_changes);
1720                 if (was_inset)
1721                         cur.forceBufferUpdate();
1722                 else
1723                         cur.checkBufferStructure();
1724         }
1725
1726         if (cur.pos() == cur.lastpos())
1727                 cur.setCurrentFont();
1728
1729         needsUpdate |= handleBibitems(cur);
1730
1731         // A singlePar update is not enough in this case.
1732 //              cur.screenUpdateFlags(Update::Force);
1733         cur.top().setPitPos(cur.pit(), cur.pos());
1734
1735         return needsUpdate;
1736 }
1737
1738
1739 bool Text::dissolveInset(Cursor & cur)
1740 {
1741         LASSERT(this == cur.text(), return false);
1742
1743         if (isMainText() || cur.inset().nargs() != 1)
1744                 return false;
1745
1746         cur.recordUndoInset();
1747         cur.setMark(false);
1748         cur.selHandle(false);
1749         // save position inside inset
1750         pos_type spos = cur.pos();
1751         pit_type spit = cur.pit();
1752         ParagraphList plist;
1753         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1754                 plist = paragraphs();
1755         cur.popBackward();
1756         // update cursor offset
1757         if (spit == 0)
1758                 spos += cur.pos();
1759         spit += cur.pit();
1760         // remember position outside inset to delete inset later
1761         // we do not do it now to avoid memory reuse issues (see #10667).
1762         DocIterator inset_it = cur;
1763         // jump over inset
1764         ++cur.pos();
1765
1766         Buffer & b = *cur.buffer();
1767         if (!plist.empty()) {
1768                 // see bug 7319
1769                 // we clear the cache so that we won't get conflicts with labels
1770                 // that get pasted into the buffer. we should update this before
1771                 // its being empty matters. if not (i.e., if we encounter bugs),
1772                 // then this should instead be:
1773                 //        cur.buffer().updateBuffer();
1774                 // but we'll try the cheaper solution here.
1775                 cur.buffer()->clearReferenceCache();
1776
1777                 // ERT paragraphs have the Language latex_language.
1778                 // This is invalid outside of ERT, so we need to
1779                 // change it to the buffer language.
1780                 ParagraphList::iterator it = plist.begin();
1781                 ParagraphList::iterator it_end = plist.end();
1782                 for (; it != it_end; ++it)
1783                         it->changeLanguage(b.params(), latex_language, b.language());
1784
1785                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1786                                    b.errorList("Paste"));
1787         }
1788
1789         // delete the inset now
1790         inset_it.paragraph().eraseChar(inset_it.pos(), b.params().track_changes);
1791
1792         // restore position
1793         cur.pit() = min(cur.lastpit(), spit);
1794         cur.pos() = min(cur.lastpos(), spos);
1795         // Ensure the current language is set correctly (bug 6292)
1796         cur.text()->setCursor(cur, cur.pit(), cur.pos());
1797         cur.clearSelection();
1798         cur.resetAnchor();
1799         cur.forceBufferUpdate();
1800
1801         return true;
1802 }
1803
1804
1805 void Text::getWord(CursorSlice & from, CursorSlice & to,
1806         word_location const loc) const
1807 {
1808         to = from;
1809         pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
1810 }
1811
1812
1813 void Text::write(ostream & os) const
1814 {
1815         Buffer const & buf = owner_->buffer();
1816         ParagraphList::const_iterator pit = paragraphs().begin();
1817         ParagraphList::const_iterator end = paragraphs().end();
1818         depth_type dth = 0;
1819         for (; pit != end; ++pit)
1820                 pit->write(os, buf.params(), dth);
1821
1822         // Close begin_deeper
1823         for(; dth > 0; --dth)
1824                 os << "\n\\end_deeper";
1825 }
1826
1827
1828 bool Text::read(Lexer & lex,
1829                 ErrorList & errorList, InsetText * insetPtr)
1830 {
1831         Buffer const & buf = owner_->buffer();
1832         depth_type depth = 0;
1833         bool res = true;
1834
1835         while (lex.isOK()) {
1836                 lex.nextToken();
1837                 string const token = lex.getString();
1838
1839                 if (token.empty())
1840                         continue;
1841
1842                 if (token == "\\end_inset")
1843                         break;
1844
1845                 if (token == "\\end_body")
1846                         continue;
1847
1848                 if (token == "\\begin_body")
1849                         continue;
1850
1851                 if (token == "\\end_document") {
1852                         res = false;
1853                         break;
1854                 }
1855
1856                 if (token == "\\begin_layout") {
1857                         lex.pushToken(token);
1858
1859                         Paragraph par;
1860                         par.setInsetOwner(insetPtr);
1861                         par.params().depth(depth);
1862                         par.setFont(0, Font(inherit_font, buf.params().language));
1863                         pars_.push_back(par);
1864                         readParagraph(pars_.back(), lex, errorList);
1865
1866                         // register the words in the global word list
1867                         pars_.back().updateWords();
1868                 } else if (token == "\\begin_deeper") {
1869                         ++depth;
1870                 } else if (token == "\\end_deeper") {
1871                         if (!depth)
1872                                 lex.printError("\\end_deeper: " "depth is already null");
1873                         else
1874                                 --depth;
1875                 } else {
1876                         LYXERR0("Handling unknown body token: `" << token << '\'');
1877                 }
1878         }
1879
1880         // avoid a crash on weird documents (bug 4859)
1881         if (pars_.empty()) {
1882                 Paragraph par;
1883                 par.setInsetOwner(insetPtr);
1884                 par.params().depth(depth);
1885                 par.setFont(0, Font(inherit_font,
1886                                     buf.params().language));
1887                 par.setPlainOrDefaultLayout(buf.params().documentClass());
1888                 pars_.push_back(par);
1889         }
1890
1891         return res;
1892 }
1893
1894
1895 // Returns the current font and depth as a message.
1896 docstring Text::currentState(CursorData const & cur, bool devel_mode) const
1897 {
1898         LBUFERR(this == cur.text());
1899         Buffer & buf = *cur.buffer();
1900         Paragraph const & par = cur.paragraph();
1901         odocstringstream os;
1902
1903         if (buf.params().track_changes)
1904                 os << _("[Change Tracking] ");
1905
1906         Change change = par.lookupChange(cur.pos());
1907
1908         if (change.changed()) {
1909                 docstring const author =
1910                         buf.params().authors().get(change.author).nameAndEmail();
1911                 docstring const date = formatted_datetime(change.changetime);
1912                 os << bformat(_("Changed by %1$s[[author]] on %2$s[[date]]. "),
1913                               author, date);
1914         }
1915
1916         // I think we should only show changes from the default
1917         // font. (Asger)
1918         // No, from the document font (MV)
1919         Font font = cur.real_current_font;
1920         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1921
1922         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1923
1924         // The paragraph depth
1925         int depth = cur.paragraph().getDepth();
1926         if (depth > 0)
1927                 os << bformat(_(", Depth: %1$d"), depth);
1928
1929         // The paragraph spacing, but only if different from
1930         // buffer spacing.
1931         Spacing const & spacing = par.params().spacing();
1932         if (!spacing.isDefault()) {
1933                 os << _(", Spacing: ");
1934                 switch (spacing.getSpace()) {
1935                 case Spacing::Single:
1936                         os << _("Single");
1937                         break;
1938                 case Spacing::Onehalf:
1939                         os << _("OneHalf");
1940                         break;
1941                 case Spacing::Double:
1942                         os << _("Double");
1943                         break;
1944                 case Spacing::Other:
1945                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1946                         break;
1947                 case Spacing::Default:
1948                         // should never happen, do nothing
1949                         break;
1950                 }
1951         }
1952
1953         if (devel_mode) {
1954                 os << _(", Inset: ") << &cur.inset();
1955                 os << _(", Paragraph: ") << cur.pit();
1956                 os << _(", Id: ") << par.id();
1957                 os << _(", Position: ") << cur.pos();
1958                 // FIXME: Why is the check for par.size() needed?
1959                 // We are called with cur.pos() == par.size() quite often.
1960                 if (!par.empty() && cur.pos() < par.size()) {
1961                         // Force output of code point, not character
1962                         size_t const c = par.getChar(cur.pos());
1963                         os << _(", Char: 0x") << hex << c;
1964                 }
1965                 os << _(", Boundary: ") << cur.boundary();
1966 //              Row & row = cur.textRow();
1967 //              os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1968         }
1969         return os.str();
1970 }
1971
1972
1973 docstring Text::getPossibleLabel(DocIterator const & cur) const
1974 {
1975         pit_type pit = cur.pit();
1976
1977         Layout const * layout = &(pars_[pit].layout());
1978
1979         docstring text;
1980         docstring par_text = pars_[pit].asString();
1981
1982         // The return string of math matrices might contain linebreaks
1983         par_text = subst(par_text, '\n', '-');
1984         int const numwords = 3;
1985         for (int i = 0; i < numwords; ++i) {
1986                 if (par_text.empty())
1987                         break;
1988                 docstring head;
1989                 par_text = split(par_text, head, ' ');
1990                 // Is it legal to use spaces in labels ?
1991                 if (i > 0)
1992                         text += '-';
1993                 text += head;
1994         }
1995
1996         // Make sure it isn't too long
1997         unsigned int const max_label_length = 32;
1998         if (text.size() > max_label_length)
1999                 text.resize(max_label_length);
2000
2001         // Will contain the label prefix.
2002         docstring name;
2003
2004         // For section, subsection, etc...
2005         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
2006                 Layout const * layout2 = &(pars_[pit - 1].layout());
2007                 if (layout2->latextype != LATEX_PARAGRAPH) {
2008                         --pit;
2009                         layout = layout2;
2010                 }
2011         }
2012         if (layout->latextype != LATEX_PARAGRAPH)
2013                 name = layout->refprefix;
2014
2015         // For captions, we just take the caption type
2016         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
2017         if (caption_inset) {
2018                 string const & ftype = static_cast<InsetCaption *>(caption_inset)->floattype();
2019                 FloatList const & fl = cur.buffer()->params().documentClass().floats();
2020                 if (fl.typeExist(ftype)) {
2021                         Floating const & flt = fl.getType(ftype);
2022                         name = from_utf8(flt.refPrefix());
2023                 }
2024                 if (name.empty())
2025                         name = from_utf8(ftype.substr(0,3));
2026         }
2027
2028         // If none of the above worked, see if the inset knows.
2029         if (name.empty()) {
2030                 InsetLayout const & il = cur.inset().getLayout();
2031                 name = il.refprefix();
2032         }
2033
2034         if (!name.empty())
2035                 text = name + ':' + text;
2036
2037         // We need a unique label
2038         docstring label = text;
2039         int i = 1;
2040         while (cur.buffer()->insetLabel(label)) {
2041                         label = text + '-' + convert<docstring>(i);
2042                         ++i;
2043                 }
2044
2045         return label;
2046 }
2047
2048
2049 docstring Text::asString(int options) const
2050 {
2051         return asString(0, pars_.size(), options);
2052 }
2053
2054
2055 docstring Text::asString(pit_type beg, pit_type end, int options) const
2056 {
2057         size_t i = size_t(beg);
2058         docstring str = pars_[i].asString(options);
2059         for (++i; i != size_t(end); ++i) {
2060                 str += '\n';
2061                 str += pars_[i].asString(options);
2062         }
2063         return str;
2064 }
2065
2066
2067 void Text::shortenForOutliner(docstring & str, size_t const maxlen)
2068 {
2069         support::truncateWithEllipsis(str, maxlen);
2070         for (char_type & c : str)
2071                 if (c == L'\n' || c == L'\t')
2072                         c = L' ';
2073 }
2074
2075
2076 void Text::forOutliner(docstring & os, size_t const maxlen,
2077                        bool const shorten) const
2078 {
2079         pit_type end = pars_.size() - 1;
2080         if (0 <= end && !pars_[0].labelString().empty())
2081                 os += pars_[0].labelString() + ' ';
2082         forOutliner(os, maxlen, 0, end, shorten);
2083 }
2084
2085
2086 void Text::forOutliner(docstring & os, size_t const maxlen,
2087                        pit_type pit_start, pit_type pit_end,
2088                        bool const shorten) const
2089 {
2090         size_t tmplen = shorten ? maxlen + 1 : maxlen;
2091         pit_type end = min(size_t(pit_end), pars_.size() - 1);
2092         bool first = true;
2093         for (pit_type i = pit_start; i <= end && os.length() < tmplen; ++i) {
2094                 if (!first)
2095                         os += ' ';
2096                 // This function lets the first label be treated separately
2097                 pars_[i].forOutliner(os, tmplen, false, !first);
2098                 first = false;
2099         }
2100         if (shorten)
2101                 shortenForOutliner(os, maxlen);
2102 }
2103
2104
2105 void Text::charsTranspose(Cursor & cur)
2106 {
2107         LBUFERR(this == cur.text());
2108
2109         pos_type pos = cur.pos();
2110
2111         // If cursor is at beginning or end of paragraph, do nothing.
2112         if (pos == cur.lastpos() || pos == 0)
2113                 return;
2114
2115         Paragraph & par = cur.paragraph();
2116
2117         // Get the positions of the characters to be transposed.
2118         pos_type pos1 = pos - 1;
2119         pos_type pos2 = pos;
2120
2121         // In change tracking mode, ignore deleted characters.
2122         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
2123                 ++pos2;
2124         if (pos2 == cur.lastpos())
2125                 return;
2126
2127         while (pos1 >= 0 && par.isDeleted(pos1))
2128                 --pos1;
2129         if (pos1 < 0)
2130                 return;
2131
2132         // Don't do anything if one of the "characters" is not regular text.
2133         if (par.isInset(pos1) || par.isInset(pos2))
2134                 return;
2135
2136         // Store the characters to be transposed (including font information).
2137         char_type const char1 = par.getChar(pos1);
2138         Font const font1 =
2139                 par.getFontSettings(cur.buffer()->params(), pos1);
2140
2141         char_type const char2 = par.getChar(pos2);
2142         Font const font2 =
2143                 par.getFontSettings(cur.buffer()->params(), pos2);
2144
2145         // And finally, we are ready to perform the transposition.
2146         // Track the changes if Change Tracking is enabled.
2147         bool const trackChanges = cur.buffer()->params().track_changes;
2148
2149         cur.recordUndo();
2150
2151         par.eraseChar(pos2, trackChanges);
2152         par.eraseChar(pos1, trackChanges);
2153         par.insertChar(pos1, char2, font2, trackChanges);
2154         par.insertChar(pos2, char1, font1, trackChanges);
2155
2156         cur.checkBufferStructure();
2157
2158         // After the transposition, move cursor to after the transposition.
2159         setCursor(cur, cur.pit(), pos2);
2160         cur.forwardPos();
2161 }
2162
2163
2164 DocIterator Text::macrocontextPosition() const
2165 {
2166         return macrocontext_position_;
2167 }
2168
2169
2170 void Text::setMacrocontextPosition(DocIterator const & pos)
2171 {
2172         macrocontext_position_ = pos;
2173 }
2174
2175
2176 docstring Text::previousWord(CursorSlice const & sl) const
2177 {
2178         CursorSlice from = sl;
2179         CursorSlice to = sl;
2180         getWord(from, to, PREVIOUS_WORD);
2181         if (sl == from || to == from)
2182                 return docstring();
2183
2184         Paragraph const & par = sl.paragraph();
2185         return par.asString(from.pos(), to.pos());
2186 }
2187
2188
2189 bool Text::completionSupported(Cursor const & cur) const
2190 {
2191         Paragraph const & par = cur.paragraph();
2192         return cur.pos() > 0
2193                 && (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
2194                 && !par.isWordSeparator(cur.pos() - 1);
2195 }
2196
2197
2198 CompletionList const * Text::createCompletionList(Cursor const & cur) const
2199 {
2200         WordList const & list = theWordList(cur.getFont().language()->lang());
2201         return new TextCompletionList(cur, list);
2202 }
2203
2204
2205 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
2206 {
2207         LBUFERR(cur.bv().cursor() == cur);
2208         cur.insert(s);
2209         cur.bv().cursor() = cur;
2210         if (!(cur.result().screenUpdate() & Update::Force))
2211                 cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
2212         return true;
2213 }
2214
2215
2216 docstring Text::completionPrefix(Cursor const & cur) const
2217 {
2218         return previousWord(cur.top());
2219 }
2220
2221 } // namespace lyx