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 "VSpace.h"
  50 #include "WordLangTuple.h"
  51 #include "WordList.h"
  52
  53 #include "insets/InsetText.h"
  54 #include "insets/InsetBibitem.h"
  55 #include "insets/InsetCaption.h"
  56 #include "insets/InsetLine.h"
  57 #include "insets/InsetNewline.h"
  58 #include "insets/InsetNewpage.h"
  59 #include "insets/InsetOptArg.h"
  60 #include "insets/InsetSpace.h"
  61 #include "insets/InsetSpecialChar.h"
  62 #include "insets/InsetTabular.h"
  63
  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/textutils.h"
  70
  71 #include <boost/next_prior.hpp>
  72
  73 #include <sstream>
  74
  75 using namespace std;
  76 using namespace lyx::support;
  77
  78 namespace lyx {
  79
  80 using cap::cutSelection;
  81 using cap::pasteParagraphList;
  82
  83 static bool moveItem(Paragraph & fromPar, pos_type fromPos,
  84         Paragraph & toPar, pos_type toPos, BufferParams const & params)
  85 {
  86         // Note: moveItem() does not honour change tracking!
  87         // Therefore, it should only be used for breaking and merging paragraphs
  88
  89         // We need a copy here because the character at fromPos is going to be erased.
  90         Font const tmpFont = fromPar.getFontSettings(params, fromPos);
  91         Change const tmpChange = fromPar.lookupChange(fromPos);
  92
  93         if (Inset * tmpInset = fromPar.getInset(fromPos)) {
  94                 fromPar.releaseInset(fromPos);
  95                 // The inset is not in fromPar any more.
  96                 if (!toPar.insertInset(toPos, tmpInset, tmpFont, tmpChange)) {
  97                         delete tmpInset;
  98                         return false;
  99                 }
 100                 return true;
 101         }
 102
 103         char_type const tmpChar = fromPar.getChar(fromPos);
 104         fromPar.eraseChar(fromPos, false);
 105         toPar.insertChar(toPos, tmpChar, tmpFont, tmpChange);
 106         return true;
 107 }
 108
 109
 110 void breakParagraphConservative(BufferParams const & bparams,
 111         ParagraphList & pars, pit_type par_offset, pos_type pos)
 112 {
 113         // create a new paragraph
 114         Paragraph & tmp = *pars.insert(boost::next(pars.begin(), par_offset + 1),
 115                                        Paragraph());
 116         Paragraph & par = pars[par_offset];
 117
 118         tmp.setInsetOwner(&par.inInset());
 119         tmp.makeSameLayout(par);
 120
 121         LASSERT(pos <= par.size(), /**/);
 122
 123         if (pos < par.size()) {
 124                 // move everything behind the break position to the new paragraph
 125                 pos_type pos_end = par.size() - 1;
 126
 127                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 128                         if (moveItem(par, pos, tmp, j, bparams)) {
 129                                 ++j;
 130                         }
 131                 }
 132                 // Move over the end-of-par change information
 133                 tmp.setChange(tmp.size(), par.lookupChange(par.size()));
 134                 par.setChange(par.size(), Change(bparams.trackChanges ?
 135                                            Change::INSERTED : Change::UNCHANGED));
 136         }
 137 }
 138
 139
 140 void mergeParagraph(BufferParams const & bparams,
 141         ParagraphList & pars, pit_type par_offset)
 142 {
 143         Paragraph & next = pars[par_offset + 1];
 144         Paragraph & par = pars[par_offset];
 145
 146         pos_type pos_end = next.size() - 1;
 147         pos_type pos_insert = par.size();
 148
 149         // the imaginary end-of-paragraph character (at par.size()) has to be
 150         // marked as unmodified. Otherwise, its change is adopted by the first
 151         // character of the next paragraph.
 152         if (par.isChanged(par.size())) {
 153                 LYXERR(Debug::CHANGES,
 154                    "merging par with inserted/deleted end-of-par character");
 155                 par.setChange(par.size(), Change(Change::UNCHANGED));
 156         }
 157
 158         Change change = next.lookupChange(next.size());
 159
 160         // move the content of the second paragraph to the end of the first one
 161         for (pos_type i = 0, j = pos_insert; i <= pos_end; ++i) {
 162                 if (moveItem(next, 0, par, j, bparams)) {
 163                         ++j;
 164                 }
 165         }
 166
 167         // move the change of the end-of-paragraph character
 168         par.setChange(par.size(), change);
 169
 170         pars.erase(boost::next(pars.begin(), par_offset + 1));
 171 }
 172
 173
 174 pit_type Text::depthHook(pit_type pit, depth_type depth) const
 175 {
 176         pit_type newpit = pit;
 177
 178         if (newpit != 0)
 179                 --newpit;
 180
 181         while (newpit != 0 && pars_[newpit].getDepth() > depth)
 182                 --newpit;
 183
 184         if (pars_[newpit].getDepth() > depth)
 185                 return pit;
 186
 187         return newpit;
 188 }
 189
 190
 191 pit_type Text::outerHook(pit_type par_offset) const
 192 {
 193         Paragraph const & par = pars_[par_offset];
 194
 195         if (par.getDepth() == 0)
 196                 return pars_.size();
 197         return depthHook(par_offset, depth_type(par.getDepth() - 1));
 198 }
 199
 200
 201 bool Text::isFirstInSequence(pit_type par_offset) const
 202 {
 203         Paragraph const & par = pars_[par_offset];
 204
 205         pit_type dhook_offset = depthHook(par_offset, par.getDepth());
 206
 207         if (dhook_offset == par_offset)
 208                 return true;
 209
 210         Paragraph const & dhook = pars_[dhook_offset];
 211
 212         return dhook.layout() != par.layout()
 213                 || dhook.getDepth() != par.getDepth();
 214 }
 215
 216
 217 Font const Text::outerFont(pit_type par_offset) const
 218 {
 219         depth_type par_depth = pars_[par_offset].getDepth();
 220         FontInfo tmpfont = inherit_font;
 221
 222         // Resolve against environment font information
 223         while (par_offset != pit_type(pars_.size())
 224                && par_depth
 225                && !tmpfont.resolved()) {
 226                 par_offset = outerHook(par_offset);
 227                 if (par_offset != pit_type(pars_.size())) {
 228                         tmpfont.realize(pars_[par_offset].layout().font);
 229                         par_depth = pars_[par_offset].getDepth();
 230                 }
 231         }
 232
 233         return Font(tmpfont);
 234 }
 235
 236
 237 void acceptChanges(ParagraphList & pars, BufferParams const & bparams)
 238 {
 239         pit_type pars_size = static_cast<pit_type>(pars.size());
 240
 241         // first, accept changes within each individual paragraph
 242         // (do not consider end-of-par)
 243         for (pit_type pit = 0; pit < pars_size; ++pit) {
 244                 if (!pars[pit].empty())   // prevent assertion failure
 245                         pars[pit].acceptChanges(0, pars[pit].size());
 246         }
 247
 248         // next, accept imaginary end-of-par characters
 249         for (pit_type pit = 0; pit < pars_size; ++pit) {
 250                 pos_type pos = pars[pit].size();
 251
 252                 if (pars[pit].isInserted(pos)) {
 253                         pars[pit].setChange(pos, Change(Change::UNCHANGED));
 254                 } else if (pars[pit].isDeleted(pos)) {
 255                         if (pit == pars_size - 1) {
 256                                 // we cannot remove a par break at the end of the last
 257                                 // paragraph; instead, we mark it unchanged
 258                                 pars[pit].setChange(pos, Change(Change::UNCHANGED));
 259                         } else {
 260                                 mergeParagraph(bparams, pars, pit);
 261                                 --pit;
 262                                 --pars_size;
 263                         }
 264                 }
 265         }
 266 }
 267
 268 InsetText const & Text::inset() const
 269 {
 270         return *owner_;
 271 }
 272
 273
 274 void Text::readParToken(Paragraph & par, Lexer & lex,
 275         string const & token, Font & font, Change & change, ErrorList & errorList)
 276 {
 277         Buffer const & buf = owner_->buffer();
 278         BufferParams const & bp = buf.params();
 279
 280         if (token[0] != '\\') {
 281                 docstring dstr = lex.getDocString();
 282                 par.appendString(dstr, font, change);
 283
 284         } else if (token == "\\begin_layout") {
 285                 lex.eatLine();
 286                 docstring layoutname = lex.getDocString();
 287
 288                 font = Font(inherit_font, bp.language);
 289                 change = Change(Change::UNCHANGED);
 290
 291                 DocumentClass const & tclass = bp.documentClass();
 292
 293                 if (layoutname.empty())
 294                         layoutname = tclass.defaultLayoutName();
 295
 296                 if (owner_->forcePlainLayout()) {
 297                         // in this case only the empty layout is allowed
 298                         layoutname = tclass.plainLayoutName();
 299                 } else if (par.usePlainLayout()) {
 300                         // in this case, default layout maps to empty layout
 301                         if (layoutname == tclass.defaultLayoutName())
 302                                 layoutname = tclass.plainLayoutName();
 303                 } else {
 304                         // otherwise, the empty layout maps to the default
 305                         if (layoutname == tclass.plainLayoutName())
 306                                 layoutname = tclass.defaultLayoutName();
 307                 }
 308
 309                 // When we apply an unknown layout to a document, we add this layout to the textclass
 310                 // of this document. For example, when you apply class article to a beamer document,
 311                 // all unknown layouts such as frame will be added to document class article so that
 312                 // these layouts can keep their original names.
 313                 tclass.addLayoutIfNeeded(layoutname);
 314
 315                 par.setLayout(bp.documentClass()[layoutname]);
 316
 317                 // Test whether the layout is obsolete.
 318                 Layout const & layout = par.layout();
 319                 if (!layout.obsoleted_by().empty())
 320                         par.setLayout(bp.documentClass()[layout.obsoleted_by()]);
 321
 322                 par.params().read(lex);
 323
 324         } else if (token == "\\end_layout") {
 325                 LYXERR0("Solitary \\end_layout in line " << lex.lineNumber() << "\n"
 326                        << "Missing \\begin_layout ?");
 327         } else if (token == "\\end_inset") {
 328                 LYXERR0("Solitary \\end_inset in line " << lex.lineNumber() << "\n"
 329                        << "Missing \\begin_inset ?");
 330         } else if (token == "\\begin_inset") {
 331                 Inset * inset = readInset(lex, buf);
 332                 if (inset)
 333                         par.insertInset(par.size(), inset, font, change);
 334                 else {
 335                         lex.eatLine();
 336                         docstring line = lex.getDocString();
 337                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 338                                             par.id(), 0, par.size()));
 339                 }
 340         } else if (token == "\\family") {
 341                 lex.next();
 342                 setLyXFamily(lex.getString(), font.fontInfo());
 343         } else if (token == "\\series") {
 344                 lex.next();
 345                 setLyXSeries(lex.getString(), font.fontInfo());
 346         } else if (token == "\\shape") {
 347                 lex.next();
 348                 setLyXShape(lex.getString(), font.fontInfo());
 349         } else if (token == "\\size") {
 350                 lex.next();
 351                 setLyXSize(lex.getString(), font.fontInfo());
 352         } else if (token == "\\lang") {
 353                 lex.next();
 354                 string const tok = lex.getString();
 355                 Language const * lang = languages.getLanguage(tok);
 356                 if (lang) {
 357                         font.setLanguage(lang);
 358                 } else {
 359                         font.setLanguage(bp.language);
 360                         lex.printError("Unknown language `$$Token'");
 361                 }
 362         } else if (token == "\\numeric") {
 363                 lex.next();
 364                 font.fontInfo().setNumber(setLyXMisc(lex.getString()));
 365         } else if (token == "\\emph") {
 366                 lex.next();
 367                 font.fontInfo().setEmph(setLyXMisc(lex.getString()));
 368         } else if (token == "\\bar") {
 369                 lex.next();
 370                 string const tok = lex.getString();
 371
 372                 if (tok == "under")
 373                         font.fontInfo().setUnderbar(FONT_ON);
 374                 else if (tok == "no")
 375                         font.fontInfo().setUnderbar(FONT_OFF);
 376                 else if (tok == "default")
 377                         font.fontInfo().setUnderbar(FONT_INHERIT);
 378                 else
 379                         lex.printError("Unknown bar font flag "
 380                                        "`$$Token'");
 381         } else if (token == "\\strikeout") {
 382                 lex.next();
 383                 font.fontInfo().setStrikeout(setLyXMisc(lex.getString()));
 384         } else if (token == "\\uuline") {
 385                 lex.next();
 386                 font.fontInfo().setUuline(setLyXMisc(lex.getString()));
 387         } else if (token == "\\uwave") {
 388                 lex.next();
 389                 font.fontInfo().setUwave(setLyXMisc(lex.getString()));
 390         } else if (token == "\\noun") {
 391                 lex.next();
 392                 font.fontInfo().setNoun(setLyXMisc(lex.getString()));
 393         } else if (token == "\\color") {
 394                 lex.next();
 395                 setLyXColor(lex.getString(), font.fontInfo());
 396         } else if (token == "\\SpecialChar") {
 397                 auto_ptr<Inset> inset;
 398                 inset.reset(new InsetSpecialChar);
 399                 inset->read(lex);
 400                 inset->setBuffer(const_cast<Buffer &>(buf));
 401                 par.insertInset(par.size(), inset.release(), font, change);
 402         } else if (token == "\\backslash") {
 403                 par.appendChar('\\', font, change);
 404         } else if (token == "\\LyXTable") {
 405                 auto_ptr<Inset> inset(new InsetTabular(const_cast<Buffer &>(buf)));
 406                 inset->read(lex);
 407                 par.insertInset(par.size(), inset.release(), font, change);
 408         } else if (token == "\\lyxline") {
 409                 auto_ptr<Inset> inset;
 410                 inset.reset(new InsetLine);
 411                 inset->setBuffer(const_cast<Buffer &>(buf));
 412                 par.insertInset(par.size(), inset.release(), font, change);
 413         } else if (token == "\\change_unchanged") {
 414                 change = Change(Change::UNCHANGED);
 415         } else if (token == "\\change_inserted" || token == "\\change_deleted") {
 416                 lex.eatLine();
 417                 istringstream is(lex.getString());
 418                 unsigned int aid;
 419                 time_t ct;
 420                 is >> aid >> ct;
 421                 map<unsigned int, int> const & am = bp.author_map;
 422                 if (am.find(aid) == am.end()) {
 423                         errorList.push_back(ErrorItem(_("Change tracking error"),
 424                                             bformat(_("Unknown author index for change: %1$d\n"), aid),
 425                                             par.id(), 0, par.size()));
 426                         change = Change(Change::UNCHANGED);
 427                 } else {
 428                         if (token == "\\change_inserted")
 429                                 change = Change(Change::INSERTED, am.find(aid)->second, ct);
 430                         else
 431                                 change = Change(Change::DELETED, am.find(aid)->second, ct);
 432                 }
 433         } else {
 434                 lex.eatLine();
 435                 errorList.push_back(ErrorItem(_("Unknown token"),
 436                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 437                         lex.getDocString()),
 438                         par.id(), 0, par.size()));
 439         }
 440 }
 441
 442
 443 void Text::readParagraph(Paragraph & par, Lexer & lex,
 444         ErrorList & errorList)
 445 {
 446         lex.nextToken();
 447         string token = lex.getString();
 448         Font font;
 449         Change change(Change::UNCHANGED);
 450
 451         while (lex.isOK()) {
 452                 readParToken(par, lex, token, font, change, errorList);
 453
 454                 lex.nextToken();
 455                 token = lex.getString();
 456
 457                 if (token.empty())
 458                         continue;
 459
 460                 if (token == "\\end_layout") {
 461                         //Ok, paragraph finished
 462                         break;
 463                 }
 464
 465                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 466                 if (token == "\\begin_layout" || token == "\\end_document"
 467                     || token == "\\end_inset" || token == "\\begin_deeper"
 468                     || token == "\\end_deeper") {
 469                         lex.pushToken(token);
 470                         lyxerr << "Paragraph ended in line "
 471                                << lex.lineNumber() << "\n"
 472                                << "Missing \\end_layout.\n";
 473                         break;
 474                 }
 475         }
 476         // Final change goes to paragraph break:
 477         par.setChange(par.size(), change);
 478
 479         // Initialize begin_of_body_ on load; redoParagraph maintains
 480         par.setBeginOfBody();
 481 }
 482
 483
 484 class TextCompletionList : public CompletionList
 485 {
 486 public:
 487         ///
 488         TextCompletionList(Cursor const & cur)
 489                 : buffer_(cur.buffer()), pos_(0)
 490         {}
 491         ///
 492         virtual ~TextCompletionList() {}
 493
 494         ///
 495         virtual bool sorted() const { return true; }
 496         ///
 497         virtual size_t size() const
 498         {
 499                 return theWordList().size();
 500         }
 501         ///
 502         virtual docstring const & data(size_t idx) const
 503         {
 504                 return theWordList().word(idx);
 505         }
 506
 507 private:
 508         ///
 509         Buffer const * buffer_;
 510         ///
 511         size_t pos_;
 512 };
 513
 514
 515 bool Text::empty() const
 516 {
 517         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 518                 // FIXME: Should we consider the labeled type as empty too?
 519                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 520 }
 521
 522
 523 double Text::spacing(Paragraph const & par) const
 524 {
 525         if (par.params().spacing().isDefault())
 526                 return owner_->buffer().params().spacing().getValue();
 527         return par.params().spacing().getValue();
 528 }
 529
 530
 531 /**
 532  * This breaks a paragraph at the specified position.
 533  * The new paragraph will:
 534  * - Decrease depth by one (or change layout to default layout) when
 535  *    keep_layout == false
 536  * - keep current depth and layout when keep_layout == true
 537  */
 538 static void breakParagraph(Text & text, pit_type par_offset, pos_type pos,
 539                     bool keep_layout)
 540 {
 541         BufferParams const & bparams = text.inset().buffer().params();
 542         ParagraphList & pars = text.paragraphs();
 543         // create a new paragraph, and insert into the list
 544         ParagraphList::iterator tmp =
 545                 pars.insert(boost::next(pars.begin(), par_offset + 1),
 546                             Paragraph());
 547
 548         Paragraph & par = pars[par_offset];
 549
 550         // remember to set the inset_owner
 551         tmp->setInsetOwner(&par.inInset());
 552         // without doing that we get a crash when typing <Return> at the
 553         // end of a paragraph
 554         tmp->setPlainOrDefaultLayout(bparams.documentClass());
 555
 556         // layout stays the same with latex-environments
 557         if (keep_layout) {
 558                 tmp->setLayout(par.layout());
 559                 tmp->setLabelWidthString(par.params().labelWidthString());
 560                 tmp->params().depth(par.params().depth());
 561         } else if (par.params().depth() > 0) {
 562                 Paragraph const & hook = pars[text.outerHook(par_offset)];
 563                 tmp->setLayout(hook.layout());
 564                 // not sure the line below is useful
 565                 tmp->setLabelWidthString(par.params().labelWidthString());
 566                 tmp->params().depth(hook.params().depth());
 567         }
 568
 569         bool const isempty = (par.allowEmpty() && par.empty());
 570
 571         if (!isempty && (par.size() > pos || par.empty())) {
 572                 tmp->setLayout(par.layout());
 573                 tmp->params().align(par.params().align());
 574                 tmp->setLabelWidthString(par.params().labelWidthString());
 575
 576                 tmp->params().depth(par.params().depth());
 577                 tmp->params().noindent(par.params().noindent());
 578
 579                 // move everything behind the break position
 580                 // to the new paragraph
 581
 582                 /* Note: if !keepempty, empty() == true, then we reach
 583                  * here with size() == 0. So pos_end becomes - 1. This
 584                  * doesn't cause problems because both loops below
 585                  * enforce pos <= pos_end and 0 <= pos
 586                  */
 587                 pos_type pos_end = par.size() - 1;
 588
 589                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 590                         if (moveItem(par, pos, *tmp, j, bparams)) {
 591                                 ++j;
 592                         }
 593                 }
 594         }
 595
 596         // Move over the end-of-par change information
 597         tmp->setChange(tmp->size(), par.lookupChange(par.size()));
 598         par.setChange(par.size(), Change(bparams.trackChanges ?
 599                                            Change::INSERTED : Change::UNCHANGED));
 600
 601         if (pos) {
 602                 // Make sure that we keep the language when
 603                 // breaking paragraph.
 604                 if (tmp->empty()) {
 605                         Font changed = tmp->getFirstFontSettings(bparams);
 606                         Font const & old = par.getFontSettings(bparams, par.size());
 607                         changed.setLanguage(old.language());
 608                         tmp->setFont(0, changed);
 609                 }
 610
 611                 return;
 612         }
 613
 614         if (!isempty) {
 615                 bool const soa = par.params().startOfAppendix();
 616                 par.params().clear();
 617                 // do not lose start of appendix marker (bug 4212)
 618                 par.params().startOfAppendix(soa);
 619                 par.setPlainOrDefaultLayout(bparams.documentClass());
 620         }
 621
 622         // layout stays the same with latex-environments
 623         if (keep_layout) {
 624                 par.setLayout(tmp->layout());
 625                 par.setLabelWidthString(tmp->params().labelWidthString());
 626                 par.params().depth(tmp->params().depth());
 627         }
 628 }
 629
 630
 631 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 632 {
 633         LASSERT(this == cur.text(), /**/);
 634
 635         Paragraph & cpar = cur.paragraph();
 636         pit_type cpit = cur.pit();
 637
 638         DocumentClass const & tclass = cur.buffer()->params().documentClass();
 639         Layout const & layout = cpar.layout();
 640
 641         // this is only allowed, if the current paragraph is not empty
 642         // or caption and if it has not the keepempty flag active
 643         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 644             layout.labeltype != LABEL_SENSITIVE)
 645                 return;
 646
 647         // a layout change may affect also the following paragraph
 648         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 649
 650         // Always break behind a space
 651         // It is better to erase the space (Dekel)
 652         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 653                 cpar.eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
 654
 655         // What should the layout for the new paragraph be?
 656         bool keep_layout = inverse_logic ?
 657                 !layout.isEnvironment()
 658                 : layout.isEnvironment();
 659
 660         // We need to remember this before we break the paragraph, because
 661         // that invalidates the layout variable
 662         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 663
 664         // we need to set this before we insert the paragraph.
 665         bool const isempty = cpar.allowEmpty() && cpar.empty();
 666
 667         lyx::breakParagraph(*this, cpit, cur.pos(), keep_layout);
 668
 669         // After this, neither paragraph contains any rows!
 670
 671         cpit = cur.pit();
 672         pit_type next_par = cpit + 1;
 673
 674         // well this is the caption hack since one caption is really enough
 675         if (sensitive) {
 676                 if (cur.pos() == 0)
 677                         // set to standard-layout
 678                 //FIXME Check if this should be plainLayout() in some cases
 679                         pars_[cpit].applyLayout(tclass.defaultLayout());
 680                 else
 681                         // set to standard-layout
 682                         //FIXME Check if this should be plainLayout() in some cases
 683                         pars_[next_par].applyLayout(tclass.defaultLayout());
 684         }
 685
 686         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 687                 if (!pars_[next_par].eraseChar(0, cur.buffer()->params().trackChanges))
 688                         break; // the character couldn't be deleted physically due to change tracking
 689         }
 690
 691         cur.buffer()->updateLabels();
 692
 693         // A singlePar update is not enough in this case.
 694         cur.updateFlags(Update::Force);
 695
 696         // This check is necessary. Otherwise the new empty paragraph will
 697         // be deleted automatically. And it is more friendly for the user!
 698         if (cur.pos() != 0 || isempty)
 699                 setCursor(cur, cur.pit() + 1, 0);
 700         else
 701                 setCursor(cur, cur.pit(), 0);
 702 }
 703
 704
 705 // needed to insert the selection
 706 void Text::insertStringAsLines(DocIterator const & dit, docstring const & str,
 707                 Font const & font)
 708 {
 709         BufferParams const & bparams = owner_->buffer().params();
 710         pit_type pit = dit.pit();
 711         pos_type pos = dit.pos();
 712
 713         // insert the string, don't insert doublespace
 714         bool space_inserted = true;
 715         for (docstring::const_iterator cit = str.begin();
 716             cit != str.end(); ++cit) {
 717                 Paragraph & par = pars_[pit];
 718                 if (*cit == '\n') {
 719                         if (autoBreakRows_ && (!par.empty() || par.allowEmpty())) {
 720                                 lyx::breakParagraph(*this, pit, pos,
 721                                         par.layout().isEnvironment());
 722                                 ++pit;
 723                                 pos = 0;
 724                                 space_inserted = true;
 725                         } else {
 726                                 continue;
 727                         }
 728                         // do not insert consecutive spaces if !free_spacing
 729                 } else if ((*cit == ' ' || *cit == '\t') &&
 730                            space_inserted && !par.isFreeSpacing()) {
 731                         continue;
 732                 } else if (*cit == '\t') {
 733                         if (!par.isFreeSpacing()) {
 734                                 // tabs are like spaces here
 735                                 par.insertChar(pos, ' ', font, bparams.trackChanges);
 736                                 ++pos;
 737                                 space_inserted = true;
 738                         } else {
 739                                 par.insertChar(pos, *cit, font, bparams.trackChanges);
 740                                 ++pos;
 741                                 space_inserted = true;
 742                         }
 743                 } else if (!isPrintable(*cit)) {
 744                         // Ignore unprintables
 745                         continue;
 746                 } else {
 747                         // just insert the character
 748                         par.insertChar(pos, *cit, font, bparams.trackChanges);
 749                         ++pos;
 750                         space_inserted = (*cit == ' ');
 751                 }
 752         }
 753 }
 754
 755
 756 // turn double CR to single CR, others are converted into one
 757 // blank. Then insertStringAsLines is called
 758 void Text::insertStringAsParagraphs(DocIterator const & dit, docstring const & str,
 759                 Font const & font)
 760 {
 761         docstring linestr = str;
 762         bool newline_inserted = false;
 763
 764         for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 765                 if (linestr[i] == '\n') {
 766                         if (newline_inserted) {
 767                                 // we know that \r will be ignored by
 768                                 // insertStringAsLines. Of course, it is a dirty
 769                                 // trick, but it works...
 770                                 linestr[i - 1] = '\r';
 771                                 linestr[i] = '\n';
 772                         } else {
 773                                 linestr[i] = ' ';
 774                                 newline_inserted = true;
 775                         }
 776                 } else if (isPrintable(linestr[i])) {
 777                         newline_inserted = false;
 778                 }
 779         }
 780         insertStringAsLines(dit, linestr, font);
 781 }
 782
 783
 784 // insert a character, moves all the following breaks in the
 785 // same Paragraph one to the right and make a rebreak
 786 void Text::insertChar(Cursor & cur, char_type c)
 787 {
 788         LASSERT(this == cur.text(), /**/);
 789
 790         cur.recordUndo(INSERT_UNDO);
 791
 792         TextMetrics const & tm = cur.bv().textMetrics(this);
 793         Buffer const & buffer = *cur.buffer();
 794         Paragraph & par = cur.paragraph();
 795         // try to remove this
 796         pit_type const pit = cur.pit();
 797
 798         bool const freeSpacing = par.layout().free_spacing ||
 799                 par.isFreeSpacing();
 800
 801         if (lyxrc.auto_number) {
 802                 static docstring const number_operators = from_ascii("+-/*");
 803                 static docstring const number_unary_operators = from_ascii("+-");
 804                 static docstring const number_seperators = from_ascii(".,:");
 805
 806                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 807                         if (!isDigit(c) && !contains(number_operators, c) &&
 808                             !(contains(number_seperators, c) &&
 809                               cur.pos() != 0 &&
 810                               cur.pos() != cur.lastpos() &&
 811                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 812                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 813                            )
 814                                 number(cur); // Set current_font.number to OFF
 815                 } else if (isDigit(c) &&
 816                            cur.real_current_font.isVisibleRightToLeft()) {
 817                         number(cur); // Set current_font.number to ON
 818
 819                         if (cur.pos() != 0) {
 820                                 char_type const c = par.getChar(cur.pos() - 1);
 821                                 if (contains(number_unary_operators, c) &&
 822                                     (cur.pos() == 1
 823                                      || par.isSeparator(cur.pos() - 2)
 824                                      || par.isNewline(cur.pos() - 2))
 825                                   ) {
 826                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 827                                                 tm.font_);
 828                                 } else if (contains(number_seperators, c)
 829                                      && cur.pos() >= 2
 830                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 831                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 832                                                 tm.font_);
 833                                 }
 834                         }
 835                 }
 836         }
 837
 838         // In Bidi text, we want spaces to be treated in a special way: spaces
 839         // which are between words in different languages should get the
 840         // paragraph's language; otherwise, spaces should keep the language
 841         // they were originally typed in. This is only in effect while typing;
 842         // after the text is already typed in, the user can always go back and
 843         // explicitly set the language of a space as desired. But 99.9% of the
 844         // time, what we're doing here is what the user actually meant.
 845         //
 846         // The following cases are the ones in which the language of the space
 847         // should be changed to match that of the containing paragraph. In the
 848         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 849         // represents a space, pipe (|) represents the cursor position (so the
 850         // character before it is the one just typed in). The different cases
 851         // are depicted logically (not visually), from left to right:
 852         //
 853         // 1. A_a|
 854         // 2. a_A|
 855         //
 856         // Theoretically, there are other situations that we should, perhaps, deal
 857         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 858         // point (to understand why, just try to create this situation...).
 859
 860         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 861                 // get font in front and behind the space in question. But do NOT
 862                 // use getFont(cur.pos()) because the character c is not inserted yet
 863                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 864                 Font const & post_space_font = cur.real_current_font;
 865                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 866                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 867
 868                 if (pre_space_rtl != post_space_rtl) {
 869                         // Set the space's language to match the language of the
 870                         // adjacent character whose direction is the paragraph's
 871                         // direction; don't touch other properties of the font
 872                         Language const * lang =
 873                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 874                                 pre_space_font.language() : post_space_font.language();
 875
 876                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
 877                         space_font.setLanguage(lang);
 878                         par.setFont(cur.pos() - 1, space_font);
 879                 }
 880         }
 881
 882         // Next check, if there will be two blanks together or a blank at
 883         // the beginning of a paragraph.
 884         // I decided to handle blanks like normal characters, the main
 885         // difference are the special checks when calculating the row.fill
 886         // (blank does not count at the end of a row) and the check here
 887
 888         // When the free-spacing option is set for the current layout,
 889         // disable the double-space checking
 890         if (!freeSpacing && isLineSeparatorChar(c)) {
 891                 if (cur.pos() == 0) {
 892                         static bool sent_space_message = false;
 893                         if (!sent_space_message) {
 894                                 cur.message(_("You cannot insert a space at the "
 895                                                            "beginning of a paragraph. Please read the Tutorial."));
 896                                 sent_space_message = true;
 897                         }
 898                         return;
 899                 }
 900                 LASSERT(cur.pos() > 0, /**/);
 901                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 902                     && !par.isDeleted(cur.pos() - 1)) {
 903                         static bool sent_space_message = false;
 904                         if (!sent_space_message) {
 905                                 cur.message(_("You cannot type two spaces this way. "
 906                                                            "Please read the Tutorial."));
 907                                 sent_space_message = true;
 908                         }
 909                         return;
 910                 }
 911         }
 912
 913         par.insertChar(cur.pos(), c, cur.current_font,
 914                 cur.buffer()->params().trackChanges);
 915         cur.checkBufferStructure();
 916
 917 //              cur.updateFlags(Update::Force);
 918         bool boundary = tm.isRTLBoundary(cur.pit(), cur.pos() + 1);
 919         setCursor(cur, cur.pit(), cur.pos() + 1, false, boundary);
 920         charInserted(cur);
 921 }
 922
 923
 924 void Text::charInserted(Cursor & cur)
 925 {
 926         Paragraph & par = cur.paragraph();
 927
 928         // Here we call finishUndo for every 20 characters inserted.
 929         // This is from my experience how emacs does it. (Lgb)
 930         if (undo_counter_ < 20) {
 931                 ++undo_counter_;
 932         } else {
 933                 cur.finishUndo();
 934                 undo_counter_ = 0;
 935         }
 936
 937         // register word if a non-letter was entered
 938         if (cur.pos() > 1
 939             && !par.isWordSeparator(cur.pos() - 2)
 940             && par.isWordSeparator(cur.pos() - 1)) {
 941                 // get the word in front of cursor
 942                 LASSERT(this == cur.text(), /**/);
 943                 cur.paragraph().updateWords();
 944         }
 945 }
 946
 947
 948 // the cursor set functions have a special mechanism. When they
 949 // realize, that you left an empty paragraph, they will delete it.
 950
 951 bool Text::cursorForwardOneWord(Cursor & cur)
 952 {
 953         LASSERT(this == cur.text(), /**/);
 954
 955         pos_type const lastpos = cur.lastpos();
 956         pit_type pit = cur.pit();
 957         pos_type pos = cur.pos();
 958         Paragraph const & par = cur.paragraph();
 959
 960         // Paragraph boundary is a word boundary
 961         if (pos == lastpos) {
 962                 if (pit != cur.lastpit())
 963                         return setCursor(cur, pit + 1, 0);
 964                 else
 965                         return false;
 966         }
 967
 968         if (lyxrc.mac_like_word_movement) {
 969                 // Skip through trailing punctuation and spaces.
 970                 while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
 971                         ++pos;
 972
 973                 // Skip over either a non-char inset or a full word
 974                 if (pos != lastpos && par.isWordSeparator(pos))
 975                         ++pos;
 976                 else while (pos != lastpos && !par.isWordSeparator(pos))
 977                              ++pos;
 978         } else {
 979                 LASSERT(pos < lastpos, /**/); // see above
 980                 if (!par.isWordSeparator(pos))
 981                         while (pos != lastpos && !par.isWordSeparator(pos))
 982                                 ++pos;
 983                 else if (par.isChar(pos))
 984                         while (pos != lastpos && par.isChar(pos))
 985                                 ++pos;
 986                 else if (!par.isSpace(pos)) // non-char inset
 987                         ++pos;
 988
 989                 // Skip over white space
 990                 while (pos != lastpos && par.isSpace(pos))
 991                              ++pos;
 992         }
 993
 994         return setCursor(cur, pit, pos);
 995 }
 996
 997
 998 bool Text::cursorBackwardOneWord(Cursor & cur)
 999 {
1000         LASSERT(this == cur.text(), /**/);
1001
1002         pit_type pit = cur.pit();
1003         pos_type pos = cur.pos();
1004         Paragraph & par = cur.paragraph();
1005
1006         // Paragraph boundary is a word boundary
1007         if (pos == 0 && pit != 0)
1008                 return setCursor(cur, pit - 1, getPar(pit - 1).size());
1009
1010         if (lyxrc.mac_like_word_movement) {
1011                 // Skip through punctuation and spaces.
1012                 while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
1013                         --pos;
1014
1015                 // Skip over either a non-char inset or a full word
1016                 if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
1017                         --pos;
1018                 else while (pos != 0 && !par.isWordSeparator(pos - 1))
1019                              --pos;
1020         } else {
1021                 // Skip over white space
1022                 while (pos != 0 && par.isSpace(pos - 1))
1023                              --pos;
1024
1025                 if (pos != 0 && !par.isWordSeparator(pos - 1))
1026                         while (pos != 0 && !par.isWordSeparator(pos - 1))
1027                                 --pos;
1028                 else if (pos != 0 && par.isChar(pos - 1))
1029                         while (pos != 0 && par.isChar(pos - 1))
1030                                 --pos;
1031                 else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
1032                         --pos;
1033         }
1034
1035         return setCursor(cur, pit, pos);
1036 }
1037
1038
1039 bool Text::cursorVisLeftOneWord(Cursor & cur)
1040 {
1041         LASSERT(this == cur.text(), /**/);
1042
1043         pos_type left_pos, right_pos;
1044         bool left_is_letter, right_is_letter;
1045
1046         Cursor temp_cur = cur;
1047
1048         // always try to move at least once...
1049         while (temp_cur.posVisLeft(true /* skip_inset */)) {
1050
1051                 // collect some information about current cursor position
1052                 temp_cur.getSurroundingPos(left_pos, right_pos);
1053                 left_is_letter =
1054                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1055                 right_is_letter =
1056                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1057
1058                 // if we're not at a letter/non-letter boundary, continue moving
1059                 if (left_is_letter == right_is_letter)
1060                         continue;
1061
1062                 // we should stop when we have an LTR word on our right or an RTL word
1063                 // on our left
1064                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1065                                 temp_cur.buffer()->params(), left_pos).isRightToLeft())
1066                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1067                                 temp_cur.buffer()->params(), right_pos).isRightToLeft()))
1068                         break;
1069         }
1070
1071         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1072                                          true, temp_cur.boundary());
1073 }
1074
1075
1076 bool Text::cursorVisRightOneWord(Cursor & cur)
1077 {
1078         LASSERT(this == cur.text(), /**/);
1079
1080         pos_type left_pos, right_pos;
1081         bool left_is_letter, right_is_letter;
1082
1083         Cursor temp_cur = cur;
1084
1085         // always try to move at least once...
1086         while (temp_cur.posVisRight(true /* skip_inset */)) {
1087
1088                 // collect some information about current cursor position
1089                 temp_cur.getSurroundingPos(left_pos, right_pos);
1090                 left_is_letter =
1091                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1092                 right_is_letter =
1093                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1094
1095                 // if we're not at a letter/non-letter boundary, continue moving
1096                 if (left_is_letter == right_is_letter)
1097                         continue;
1098
1099                 // we should stop when we have an LTR word on our right or an RTL word
1100                 // on our left
1101                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1102                                 temp_cur.buffer()->params(),
1103                                 left_pos).isRightToLeft())
1104                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1105                                 temp_cur.buffer()->params(),
1106                                 right_pos).isRightToLeft()))
1107                         break;
1108         }
1109
1110         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1111                                          true, temp_cur.boundary());
1112 }
1113
1114
1115 void Text::selectWord(Cursor & cur, word_location loc)
1116 {
1117         LASSERT(this == cur.text(), /**/);
1118         CursorSlice from = cur.top();
1119         CursorSlice to = cur.top();
1120         getWord(from, to, loc);
1121         if (cur.top() != from)
1122                 setCursor(cur, from.pit(), from.pos());
1123         if (to == from)
1124                 return;
1125         cur.resetAnchor();
1126         setCursor(cur, to.pit(), to.pos());
1127         cur.setSelection();
1128 }
1129
1130
1131 void Text::selectAll(Cursor & cur)
1132 {
1133         LASSERT(this == cur.text(), /**/);
1134         if (cur.lastpos() == 0 && cur.lastpit() == 0)
1135                 return;
1136         // If the cursor is at the beginning, make sure the cursor ends there
1137         if (cur.pit() == 0 && cur.pos() == 0) {
1138                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1139                 cur.resetAnchor();
1140                 setCursor(cur, 0, 0);
1141         } else {
1142                 setCursor(cur, 0, 0);
1143                 cur.resetAnchor();
1144                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1145         }
1146         cur.setSelection();
1147 }
1148
1149
1150 // Select the word currently under the cursor when no
1151 // selection is currently set
1152 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
1153 {
1154         LASSERT(this == cur.text(), /**/);
1155         if (cur.selection())
1156                 return false;
1157         selectWord(cur, loc);
1158         return cur.selection();
1159 }
1160
1161
1162 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
1163 {
1164         LASSERT(this == cur.text(), /**/);
1165
1166         if (!cur.selection()) {
1167                 bool const changed = cur.paragraph().isChanged(cur.pos());
1168                 if (!(changed && findNextChange(&cur.bv())))
1169                         return;
1170         }
1171
1172         cur.recordUndoSelection();
1173
1174         pit_type begPit = cur.selectionBegin().pit();
1175         pit_type endPit = cur.selectionEnd().pit();
1176
1177         pos_type begPos = cur.selectionBegin().pos();
1178         pos_type endPos = cur.selectionEnd().pos();
1179
1180         // keep selection info, because endPos becomes invalid after the first loop
1181         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
1182
1183         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
1184
1185         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1186                 pos_type parSize = pars_[pit].size();
1187
1188                 // ignore empty paragraphs; otherwise, an assertion will fail for
1189                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
1190                 if (parSize == 0)
1191                         continue;
1192
1193                 // do not consider first paragraph if the cursor starts at pos size()
1194                 if (pit == begPit && begPos == parSize)
1195                         continue;
1196
1197                 // do not consider last paragraph if the cursor ends at pos 0
1198                 if (pit == endPit && endPos == 0)
1199                         break; // last iteration anyway
1200
1201                 pos_type left  = (pit == begPit ? begPos : 0);
1202                 pos_type right = (pit == endPit ? endPos : parSize);
1203
1204                 if (op == ACCEPT) {
1205                         pars_[pit].acceptChanges(left, right);
1206                 } else {
1207                         pars_[pit].rejectChanges(left, right);
1208                 }
1209         }
1210
1211         // next, accept/reject imaginary end-of-par characters
1212
1213         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1214                 pos_type pos = pars_[pit].size();
1215
1216                 // skip if the selection ends before the end-of-par
1217                 if (pit == endPit && endsBeforeEndOfPar)
1218                         break; // last iteration anyway
1219
1220                 // skip if this is not the last paragraph of the document
1221                 // note: the user should be able to accept/reject the par break of the last par!
1222                 if (pit == endPit && pit + 1 != int(pars_.size()))
1223                         break; // last iteration anway
1224
1225                 if (op == ACCEPT) {
1226                         if (pars_[pit].isInserted(pos)) {
1227                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1228                         } else if (pars_[pit].isDeleted(pos)) {
1229                                 if (pit + 1 == int(pars_.size())) {
1230                                         // we cannot remove a par break at the end of the last paragraph;
1231                                         // instead, we mark it unchanged
1232                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1233                                 } else {
1234                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1235                                         --endPit;
1236                                         --pit;
1237                                 }
1238                         }
1239                 } else {
1240                         if (pars_[pit].isDeleted(pos)) {
1241                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1242                         } else if (pars_[pit].isInserted(pos)) {
1243                                 if (pit + 1 == int(pars_.size())) {
1244                                         // we mark the par break at the end of the last paragraph unchanged
1245                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1246                                 } else {
1247                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1248                                         --endPit;
1249                                         --pit;
1250                                 }
1251                         }
1252                 }
1253         }
1254
1255         // finally, invoke the DEPM
1256
1257         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().trackChanges);
1258
1259         //
1260
1261         cur.finishUndo();
1262         cur.clearSelection();
1263         setCursorIntern(cur, begPit, begPos);
1264         cur.updateFlags(Update::Force);
1265         cur.buffer()->updateLabels();
1266 }
1267
1268
1269 void Text::acceptChanges()
1270 {
1271         BufferParams const & bparams = owner_->buffer().params();
1272         lyx::acceptChanges(pars_, bparams);
1273         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
1274 }
1275
1276
1277 void Text::rejectChanges()
1278 {
1279         BufferParams const & bparams = owner_->buffer().params();
1280         pit_type pars_size = static_cast<pit_type>(pars_.size());
1281
1282         // first, reject changes within each individual paragraph
1283         // (do not consider end-of-par)
1284         for (pit_type pit = 0; pit < pars_size; ++pit) {
1285                 if (!pars_[pit].empty())   // prevent assertion failure
1286                         pars_[pit].rejectChanges(0, pars_[pit].size());
1287         }
1288
1289         // next, reject imaginary end-of-par characters
1290         for (pit_type pit = 0; pit < pars_size; ++pit) {
1291                 pos_type pos = pars_[pit].size();
1292
1293                 if (pars_[pit].isDeleted(pos)) {
1294                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1295                 } else if (pars_[pit].isInserted(pos)) {
1296                         if (pit == pars_size - 1) {
1297                                 // we mark the par break at the end of the last
1298                                 // paragraph unchanged
1299                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1300                         } else {
1301                                 mergeParagraph(bparams, pars_, pit);
1302                                 --pit;
1303                                 --pars_size;
1304                         }
1305                 }
1306         }
1307
1308         // finally, invoke the DEPM
1309         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
1310 }
1311
1312
1313 void Text::deleteWordForward(Cursor & cur)
1314 {
1315         LASSERT(this == cur.text(), /**/);
1316         if (cur.lastpos() == 0)
1317                 cursorForward(cur);
1318         else {
1319                 cur.resetAnchor();
1320                 cur.setSelection(true);
1321                 cursorForwardOneWord(cur);
1322                 cur.setSelection();
1323                 cutSelection(cur, true, false);
1324                 cur.checkBufferStructure();
1325         }
1326 }
1327
1328
1329 void Text::deleteWordBackward(Cursor & cur)
1330 {
1331         LASSERT(this == cur.text(), /**/);
1332         if (cur.lastpos() == 0)
1333                 cursorBackward(cur);
1334         else {
1335                 cur.resetAnchor();
1336                 cur.setSelection(true);
1337                 cursorBackwardOneWord(cur);
1338                 cur.setSelection();
1339                 cutSelection(cur, true, false);
1340                 cur.checkBufferStructure();
1341         }
1342 }
1343
1344
1345 // Kill to end of line.
1346 void Text::changeCase(Cursor & cur, TextCase action)
1347 {
1348         LASSERT(this == cur.text(), /**/);
1349         CursorSlice from;
1350         CursorSlice to;
1351
1352         bool gotsel = false;
1353         if (cur.selection()) {
1354                 from = cur.selBegin();
1355                 to = cur.selEnd();
1356                 gotsel = true;
1357         } else {
1358                 from = cur.top();
1359                 getWord(from, to, PARTIAL_WORD);
1360                 cursorForwardOneWord(cur);
1361         }
1362
1363         cur.recordUndoSelection();
1364
1365         pit_type begPit = from.pit();
1366         pit_type endPit = to.pit();
1367
1368         pos_type begPos = from.pos();
1369         pos_type endPos = to.pos();
1370
1371         pos_type right = 0; // needed after the for loop
1372
1373         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1374                 Paragraph & par = pars_[pit];
1375                 pos_type const pos = (pit == begPit ? begPos : 0);
1376                 right = (pit == endPit ? endPos : par.size());
1377                 par.changeCase(cur.buffer()->params(), pos, right, action);
1378         }
1379
1380         // the selection may have changed due to logically-only deleted chars
1381         if (gotsel) {
1382                 setCursor(cur, begPit, begPos);
1383                 cur.resetAnchor();
1384                 setCursor(cur, endPit, right);
1385                 cur.setSelection();
1386         } else
1387                 setCursor(cur, endPit, right);
1388
1389         cur.checkBufferStructure();
1390 }
1391
1392
1393 bool Text::handleBibitems(Cursor & cur)
1394 {
1395         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
1396                 return false;
1397
1398         if (cur.pos() != 0)
1399                 return false;
1400
1401         BufferParams const & bufparams = cur.buffer()->params();
1402         Paragraph const & par = cur.paragraph();
1403         Cursor prevcur = cur;
1404         if (cur.pit() > 0) {
1405                 --prevcur.pit();
1406                 prevcur.pos() = prevcur.lastpos();
1407         }
1408         Paragraph const & prevpar = prevcur.paragraph();
1409
1410         // if a bibitem is deleted, merge with previous paragraph
1411         // if this is a bibliography item as well
1412         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1413                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1414                 mergeParagraph(bufparams, cur.text()->paragraphs(),
1415                                                         prevcur.pit());
1416                 cur.buffer()->updateLabels();
1417                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1418                 cur.updateFlags(Update::Force);
1419                 return true;
1420         }
1421
1422         // otherwise reset to default
1423         cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
1424         return true;
1425 }
1426
1427
1428 bool Text::erase(Cursor & cur)
1429 {
1430         LASSERT(this == cur.text(), return false);
1431         bool needsUpdate = false;
1432         Paragraph & par = cur.paragraph();
1433
1434         if (cur.pos() != cur.lastpos()) {
1435                 // this is the code for a normal delete, not pasting
1436                 // any paragraphs
1437                 cur.recordUndo(DELETE_UNDO);
1438                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1439                 if(!par.eraseChar(cur.pos(), cur.buffer()->params().trackChanges))
1440                         // the character has been logically deleted only => skip it
1441                         cur.top().forwardPos();
1442
1443                 if (was_inset)
1444                         cur.buffer()->updateLabels();
1445                 else
1446                         cur.checkBufferStructure();
1447                 needsUpdate = true;
1448         } else {
1449                 if (cur.pit() == cur.lastpit())
1450                         return dissolveInset(cur);
1451
1452                 if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1453                         par.setChange(cur.pos(), Change(Change::DELETED));
1454                         cur.forwardPos();
1455                         needsUpdate = true;
1456                 } else {
1457                         setCursorIntern(cur, cur.pit() + 1, 0);
1458                         needsUpdate = backspacePos0(cur);
1459                 }
1460         }
1461
1462         needsUpdate |= handleBibitems(cur);
1463
1464         if (needsUpdate) {
1465                 // Make sure the cursor is correct. Is this really needed?
1466                 // No, not really... at least not here!
1467                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1468                 cur.checkBufferStructure();
1469         }
1470
1471         return needsUpdate;
1472 }
1473
1474
1475 bool Text::backspacePos0(Cursor & cur)
1476 {
1477         LASSERT(this == cur.text(), /**/);
1478         if (cur.pit() == 0)
1479                 return false;
1480
1481         bool needsUpdate = false;
1482
1483         BufferParams const & bufparams = cur.buffer()->params();
1484         DocumentClass const & tclass = bufparams.documentClass();
1485         ParagraphList & plist = cur.text()->paragraphs();
1486         Paragraph const & par = cur.paragraph();
1487         Cursor prevcur = cur;
1488         --prevcur.pit();
1489         prevcur.pos() = prevcur.lastpos();
1490         Paragraph const & prevpar = prevcur.paragraph();
1491
1492         // is it an empty paragraph?
1493         if (cur.lastpos() == 0
1494             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1495                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1496                 plist.erase(boost::next(plist.begin(), cur.pit()));
1497                 needsUpdate = true;
1498         }
1499         // is previous par empty?
1500         else if (prevcur.lastpos() == 0
1501                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1502                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1503                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1504                 needsUpdate = true;
1505         }
1506         // Pasting is not allowed, if the paragraphs have different
1507         // layouts. I think it is a real bug of all other
1508         // word processors to allow it. It confuses the user.
1509         // Correction: Pasting is always allowed with standard-layout
1510         // or the empty layout.
1511         else if (par.layout() == prevpar.layout()
1512                  || tclass.isDefaultLayout(par.layout())
1513                  || tclass.isPlainLayout(par.layout())) {
1514                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1515                 mergeParagraph(bufparams, plist, prevcur.pit());
1516                 needsUpdate = true;
1517         }
1518
1519         if (needsUpdate) {
1520                 cur.buffer()->updateLabels();
1521                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1522         }
1523
1524         return needsUpdate;
1525 }
1526
1527
1528 bool Text::backspace(Cursor & cur)
1529 {
1530         LASSERT(this == cur.text(), /**/);
1531         bool needsUpdate = false;
1532         if (cur.pos() == 0) {
1533                 if (cur.pit() == 0)
1534                         return dissolveInset(cur);
1535
1536                 Paragraph & prev_par = pars_[cur.pit() - 1];
1537
1538                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1539                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1540                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1541                         return true;
1542                 }
1543                 // The cursor is at the beginning of a paragraph, so
1544                 // the backspace will collapse two paragraphs into one.
1545                 needsUpdate = backspacePos0(cur);
1546
1547         } else {
1548                 // this is the code for a normal backspace, not pasting
1549                 // any paragraphs
1550                 cur.recordUndo(DELETE_UNDO);
1551                 // We used to do cursorBackwardIntern() here, but it is
1552                 // not a good idea since it triggers the auto-delete
1553                 // mechanism. So we do a cursorBackwardIntern()-lite,
1554                 // without the dreaded mechanism. (JMarc)
1555                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1556                                 false, cur.boundary());
1557                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1558                 cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
1559                 if (was_inset)
1560                         cur.buffer()->updateLabels();
1561                 else
1562                         cur.checkBufferStructure();
1563         }
1564
1565         if (cur.pos() == cur.lastpos())
1566                 cur.setCurrentFont();
1567
1568         needsUpdate |= handleBibitems(cur);
1569
1570         // A singlePar update is not enough in this case.
1571 //              cur.updateFlags(Update::Force);
1572         setCursor(cur.top(), cur.pit(), cur.pos());
1573
1574         return needsUpdate;
1575 }
1576
1577
1578 bool Text::dissolveInset(Cursor & cur)
1579 {
1580         LASSERT(this == cur.text(), return false);
1581
1582         if (isMainText() || cur.inset().nargs() != 1)
1583                 return false;
1584
1585         cur.recordUndoInset();
1586         cur.setMark(false);
1587         cur.selHandle(false);
1588         // save position
1589         pos_type spos = cur.pos();
1590         pit_type spit = cur.pit();
1591         ParagraphList plist;
1592         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1593                 plist = paragraphs();
1594         cur.popBackward();
1595         // store cursor offset
1596         if (spit == 0)
1597                 spos += cur.pos();
1598         spit += cur.pit();
1599         Buffer & b = *cur.buffer();
1600         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1601         if (!plist.empty()) {
1602                 // ERT paragraphs have the Language latex_language.
1603                 // This is invalid outside of ERT, so we need to
1604                 // change it to the buffer language.
1605                 ParagraphList::iterator it = plist.begin();
1606                 ParagraphList::iterator it_end = plist.end();
1607                 for (; it != it_end; it++)
1608                         it->changeLanguage(b.params(), latex_language, b.language());
1609
1610                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1611                                    b.errorList("Paste"));
1612                 // restore position
1613                 cur.pit() = min(cur.lastpit(), spit);
1614                 cur.pos() = min(cur.lastpos(), spos);
1615         } else
1616                 // this is the least that needs to be done (bug 6003)
1617                 // in the above case, pasteParagraphList handles this
1618                 cur.buffer()->updateLabels();
1619         cur.clearSelection();
1620         cur.resetAnchor();
1621         return true;
1622 }
1623
1624
1625 void Text::getWord(CursorSlice & from, CursorSlice & to,
1626         word_location const loc) const
1627 {
1628         to = from;
1629         pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
1630 }
1631
1632
1633 void Text::write(ostream & os) const
1634 {
1635         Buffer const & buf = owner_->buffer();
1636         ParagraphList::const_iterator pit = paragraphs().begin();
1637         ParagraphList::const_iterator end = paragraphs().end();
1638         depth_type dth = 0;
1639         for (; pit != end; ++pit)
1640                 pit->write(os, buf.params(), dth);
1641
1642         // Close begin_deeper
1643         for(; dth > 0; --dth)
1644                 os << "\n\\end_deeper";
1645 }
1646
1647
1648 bool Text::read(Lexer & lex,
1649                 ErrorList & errorList, InsetText * insetPtr)
1650 {
1651         Buffer const & buf = owner_->buffer();
1652         depth_type depth = 0;
1653         bool res = true;
1654
1655         while (lex.isOK()) {
1656                 lex.nextToken();
1657                 string const token = lex.getString();
1658
1659                 if (token.empty())
1660                         continue;
1661
1662                 if (token == "\\end_inset")
1663                         break;
1664
1665                 if (token == "\\end_body")
1666                         continue;
1667
1668                 if (token == "\\begin_body")
1669                         continue;
1670
1671                 if (token == "\\end_document") {
1672                         res = false;
1673                         break;
1674                 }
1675
1676                 if (token == "\\begin_layout") {
1677                         lex.pushToken(token);
1678
1679                         Paragraph par;
1680                         par.setInsetOwner(insetPtr);
1681                         par.params().depth(depth);
1682                         par.setFont(0, Font(inherit_font, buf.params().language));
1683                         pars_.push_back(par);
1684                         readParagraph(pars_.back(), lex, errorList);
1685
1686                         // register the words in the global word list
1687                         pars_.back().updateWords();
1688                 } else if (token == "\\begin_deeper") {
1689                         ++depth;
1690                 } else if (token == "\\end_deeper") {
1691                         if (!depth)
1692                                 lex.printError("\\end_deeper: " "depth is already null");
1693                         else
1694                                 --depth;
1695                 } else {
1696                         LYXERR0("Handling unknown body token: `" << token << '\'');
1697                 }
1698         }
1699
1700         // avoid a crash on weird documents (bug 4859)
1701         if (pars_.empty()) {
1702                 Paragraph par;
1703                 par.setInsetOwner(insetPtr);
1704                 par.params().depth(depth);
1705                 par.setFont(0, Font(inherit_font,
1706                                     buf.params().language));
1707                 par.setPlainOrDefaultLayout(buf.params().documentClass());
1708                 pars_.push_back(par);
1709         }
1710
1711         return res;
1712 }
1713
1714 // Returns the current font and depth as a message.
1715 docstring Text::currentState(Cursor const & cur) const
1716 {
1717         LASSERT(this == cur.text(), /**/);
1718         Buffer & buf = *cur.buffer();
1719         Paragraph const & par = cur.paragraph();
1720         odocstringstream os;
1721
1722         if (buf.params().trackChanges)
1723                 os << _("[Change Tracking] ");
1724
1725         Change change = par.lookupChange(cur.pos());
1726
1727         if (change.changed()) {
1728                 Author const & a = buf.params().authors().get(change.author);
1729                 os << _("Change: ") << a.name();
1730                 if (!a.email().empty())
1731                         os << " (" << a.email() << ")";
1732                 // FIXME ctime is english, we should translate that
1733                 os << _(" at ") << ctime(&change.changetime);
1734                 os << " : ";
1735         }
1736
1737         // I think we should only show changes from the default
1738         // font. (Asger)
1739         // No, from the document font (MV)
1740         Font font = cur.real_current_font;
1741         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1742
1743         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1744
1745         // The paragraph depth
1746         int depth = cur.paragraph().getDepth();
1747         if (depth > 0)
1748                 os << bformat(_(", Depth: %1$d"), depth);
1749
1750         // The paragraph spacing, but only if different from
1751         // buffer spacing.
1752         Spacing const & spacing = par.params().spacing();
1753         if (!spacing.isDefault()) {
1754                 os << _(", Spacing: ");
1755                 switch (spacing.getSpace()) {
1756                 case Spacing::Single:
1757                         os << _("Single");
1758                         break;
1759                 case Spacing::Onehalf:
1760                         os << _("OneHalf");
1761                         break;
1762                 case Spacing::Double:
1763                         os << _("Double");
1764                         break;
1765                 case Spacing::Other:
1766                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1767                         break;
1768                 case Spacing::Default:
1769                         // should never happen, do nothing
1770                         break;
1771                 }
1772         }
1773
1774 #ifdef DEVEL_VERSION
1775         os << _(", Inset: ") << &cur.inset();
1776         os << _(", Paragraph: ") << cur.pit();
1777         os << _(", Id: ") << par.id();
1778         os << _(", Position: ") << cur.pos();
1779         // FIXME: Why is the check for par.size() needed?
1780         // We are called with cur.pos() == par.size() quite often.
1781         if (!par.empty() && cur.pos() < par.size()) {
1782                 // Force output of code point, not character
1783                 size_t const c = par.getChar(cur.pos());
1784                 os << _(", Char: 0x") << hex << c;
1785         }
1786         os << _(", Boundary: ") << cur.boundary();
1787 //      Row & row = cur.textRow();
1788 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1789 #endif
1790         return os.str();
1791 }
1792
1793
1794 docstring Text::getPossibleLabel(Cursor const & cur) const
1795 {
1796         pit_type pit = cur.pit();
1797
1798         Layout const * layout = &(pars_[pit].layout());
1799
1800         docstring text;
1801         docstring par_text = pars_[pit].asString();
1802         string piece;
1803         // the return string of math matrices might contain linebreaks
1804         par_text = subst(par_text, '\n', '-');
1805         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1806                 if (par_text.empty())
1807                         break;
1808                 docstring head;
1809                 par_text = split(par_text, head, ' ');
1810                 // Is it legal to use spaces in labels ?
1811                 if (i > 0)
1812                         text += '-';
1813                 text += head;
1814         }
1815
1816         // No need for a prefix if the user said so.
1817         if (lyxrc.label_init_length <= 0)
1818                 return text;
1819
1820         // Will contain the label type.
1821         docstring name;
1822
1823         // For section, subsection, etc...
1824         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1825                 Layout const * layout2 = &(pars_[pit - 1].layout());
1826                 if (layout2->latextype != LATEX_PARAGRAPH) {
1827                         --pit;
1828                         layout = layout2;
1829                 }
1830         }
1831         if (layout->latextype != LATEX_PARAGRAPH)
1832                 name = from_ascii(layout->latexname());
1833
1834         // for captions, we just take the caption type
1835         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1836         if (caption_inset)
1837                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1838
1839         // If none of the above worked, we'll see if we're inside various
1840         // types of insets and take our abbreviation from them.
1841         if (name.empty()) {
1842                 InsetCode const codes[] = {
1843                         FLOAT_CODE,
1844                         WRAP_CODE,
1845                         FOOT_CODE
1846                 };
1847                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1848                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1849                         if (float_inset) {
1850                                 name = float_inset->name();
1851                                 break;
1852                         }
1853                 }
1854         }
1855
1856         // Create a correct prefix for prettyref
1857         if (name == "theorem")
1858                 name = from_ascii("thm");
1859         else if (name == "Foot")
1860                 name = from_ascii("fn");
1861         else if (name == "listing")
1862                 name = from_ascii("lst");
1863
1864         if (!name.empty())
1865                 text = name.substr(0, 3) + ':' + text;
1866
1867         return text;
1868 }
1869
1870
1871 docstring Text::asString(int options) const
1872 {
1873         return asString(0, pars_.size(), options);
1874 }
1875
1876
1877 docstring Text::asString(pit_type beg, pit_type end, int options) const
1878 {
1879         size_t i = size_t(beg);
1880         docstring str = pars_[i].asString(options);
1881         for (++i; i != size_t(end); ++i) {
1882                 str += '\n';
1883                 str += pars_[i].asString(options);
1884         }
1885         return str;
1886 }
1887
1888
1889
1890 void Text::charsTranspose(Cursor & cur)
1891 {
1892         LASSERT(this == cur.text(), /**/);
1893
1894         pos_type pos = cur.pos();
1895
1896         // If cursor is at beginning or end of paragraph, do nothing.
1897         if (pos == cur.lastpos() || pos == 0)
1898                 return;
1899
1900         Paragraph & par = cur.paragraph();
1901
1902         // Get the positions of the characters to be transposed.
1903         pos_type pos1 = pos - 1;
1904         pos_type pos2 = pos;
1905
1906         // In change tracking mode, ignore deleted characters.
1907         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1908                 ++pos2;
1909         if (pos2 == cur.lastpos())
1910                 return;
1911
1912         while (pos1 >= 0 && par.isDeleted(pos1))
1913                 --pos1;
1914         if (pos1 < 0)
1915                 return;
1916
1917         // Don't do anything if one of the "characters" is not regular text.
1918         if (par.isInset(pos1) || par.isInset(pos2))
1919                 return;
1920
1921         // Store the characters to be transposed (including font information).
1922         char_type const char1 = par.getChar(pos1);
1923         Font const font1 =
1924                 par.getFontSettings(cur.buffer()->params(), pos1);
1925
1926         char_type const char2 = par.getChar(pos2);
1927         Font const font2 =
1928                 par.getFontSettings(cur.buffer()->params(), pos2);
1929
1930         // And finally, we are ready to perform the transposition.
1931         // Track the changes if Change Tracking is enabled.
1932         bool const trackChanges = cur.buffer()->params().trackChanges;
1933
1934         cur.recordUndo();
1935
1936         par.eraseChar(pos2, trackChanges);
1937         par.eraseChar(pos1, trackChanges);
1938         par.insertChar(pos1, char2, font2, trackChanges);
1939         par.insertChar(pos2, char1, font1, trackChanges);
1940
1941         cur.checkBufferStructure();
1942
1943         // After the transposition, move cursor to after the transposition.
1944         setCursor(cur, cur.pit(), pos2);
1945         cur.forwardPos();
1946 }
1947
1948
1949 DocIterator Text::macrocontextPosition() const
1950 {
1951         return macrocontext_position_;
1952 }
1953
1954
1955 void Text::setMacrocontextPosition(DocIterator const & pos)
1956 {
1957         macrocontext_position_ = pos;
1958 }
1959
1960
1961 docstring Text::previousWord(CursorSlice const & sl) const
1962 {
1963         CursorSlice from = sl;
1964         CursorSlice to = sl;
1965         getWord(from, to, PREVIOUS_WORD);
1966         if (sl == from || to == from)
1967                 return docstring();
1968
1969         Paragraph const & par = sl.paragraph();
1970         return par.asString(from.pos(), to.pos());
1971 }
1972
1973
1974 bool Text::completionSupported(Cursor const & cur) const
1975 {
1976         Paragraph const & par = cur.paragraph();
1977         return cur.pos() > 0
1978                 && (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
1979                 && !par.isWordSeparator(cur.pos() - 1);
1980 }
1981
1982
1983 CompletionList const * Text::createCompletionList(Cursor const & cur) const
1984 {
1985         return new TextCompletionList(cur);
1986 }
1987
1988
1989 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
1990 {
1991         LASSERT(cur.bv().cursor() == cur, /**/);
1992         cur.insert(s);
1993         cur.bv().cursor() = cur;
1994         if (!(cur.disp_.update() & Update::Force))
1995                 cur.updateFlags(cur.disp_.update() | Update::SinglePar);
1996         return true;
1997 }
1998
1999
2000 docstring Text::completionPrefix(Cursor const & cur) const
2001 {
2002         return previousWord(cur.top());
2003 }
2004
2005 } // namespace lyx