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 Text::Text(InsetText * owner, bool use_default_layout)
 175         : owner_(owner), autoBreakRows_(false), undo_counter_(0)
 176 {
 177         pars_.push_back(Paragraph());
 178         Paragraph & par = pars_.back();
 179         par.setInsetOwner(owner);
 180         DocumentClass const & dc = owner->buffer().params().documentClass();
 181         if (use_default_layout)
 182                 par.setDefaultLayout(dc);
 183         else
 184                 par.setPlainLayout(dc);
 185 }
 186
 187
 188 Text::Text(InsetText * owner, Text const & text)
 189         : owner_(owner), autoBreakRows_(text.autoBreakRows_), undo_counter_(0)
 190 {
 191         pars_ = text.pars_;
 192         ParagraphList::iterator const end = pars_.end();
 193         ParagraphList::iterator it = pars_.begin();
 194         for (; it != end; ++it)
 195                 it->setInsetOwner(owner);
 196 }
 197
 198
 199 pit_type Text::depthHook(pit_type pit, depth_type depth) const
 200 {
 201         pit_type newpit = pit;
 202
 203         if (newpit != 0)
 204                 --newpit;
 205
 206         while (newpit != 0 && pars_[newpit].getDepth() > depth)
 207                 --newpit;
 208
 209         if (pars_[newpit].getDepth() > depth)
 210                 return pit;
 211
 212         return newpit;
 213 }
 214
 215
 216 pit_type Text::outerHook(pit_type par_offset) const
 217 {
 218         Paragraph const & par = pars_[par_offset];
 219
 220         if (par.getDepth() == 0)
 221                 return pars_.size();
 222         return depthHook(par_offset, depth_type(par.getDepth() - 1));
 223 }
 224
 225
 226 bool Text::isFirstInSequence(pit_type par_offset) const
 227 {
 228         Paragraph const & par = pars_[par_offset];
 229
 230         pit_type dhook_offset = depthHook(par_offset, par.getDepth());
 231
 232         if (dhook_offset == par_offset)
 233                 return true;
 234
 235         Paragraph const & dhook = pars_[dhook_offset];
 236
 237         return dhook.layout() != par.layout()
 238                 || dhook.getDepth() != par.getDepth();
 239 }
 240
 241
 242 Font const Text::outerFont(pit_type par_offset) const
 243 {
 244         depth_type par_depth = pars_[par_offset].getDepth();
 245         FontInfo tmpfont = inherit_font;
 246
 247         // Resolve against environment font information
 248         while (par_offset != pit_type(pars_.size())
 249                && par_depth
 250                && !tmpfont.resolved()) {
 251                 par_offset = outerHook(par_offset);
 252                 if (par_offset != pit_type(pars_.size())) {
 253                         tmpfont.realize(pars_[par_offset].layout().font);
 254                         par_depth = pars_[par_offset].getDepth();
 255                 }
 256         }
 257
 258         return Font(tmpfont);
 259 }
 260
 261
 262 void acceptChanges(ParagraphList & pars, BufferParams const & bparams)
 263 {
 264         pit_type pars_size = static_cast<pit_type>(pars.size());
 265
 266         // first, accept changes within each individual paragraph
 267         // (do not consider end-of-par)
 268         for (pit_type pit = 0; pit < pars_size; ++pit) {
 269                 if (!pars[pit].empty())   // prevent assertion failure
 270                         pars[pit].acceptChanges(0, pars[pit].size());
 271         }
 272
 273         // next, accept imaginary end-of-par characters
 274         for (pit_type pit = 0; pit < pars_size; ++pit) {
 275                 pos_type pos = pars[pit].size();
 276
 277                 if (pars[pit].isInserted(pos)) {
 278                         pars[pit].setChange(pos, Change(Change::UNCHANGED));
 279                 } else if (pars[pit].isDeleted(pos)) {
 280                         if (pit == pars_size - 1) {
 281                                 // we cannot remove a par break at the end of the last
 282                                 // paragraph; instead, we mark it unchanged
 283                                 pars[pit].setChange(pos, Change(Change::UNCHANGED));
 284                         } else {
 285                                 mergeParagraph(bparams, pars, pit);
 286                                 --pit;
 287                                 --pars_size;
 288                         }
 289                 }
 290         }
 291 }
 292
 293 InsetText const & Text::inset() const
 294 {
 295         return *owner_;
 296 }
 297
 298
 299 void Text::readParToken(Paragraph & par, Lexer & lex,
 300         string const & token, Font & font, Change & change, ErrorList & errorList)
 301 {
 302         Buffer * buf = const_cast<Buffer *>(&owner_->buffer());
 303         BufferParams const & bp = buf->params();
 304
 305         if (token[0] != '\\') {
 306                 docstring dstr = lex.getDocString();
 307                 par.appendString(dstr, font, change);
 308
 309         } else if (token == "\\begin_layout") {
 310                 lex.eatLine();
 311                 docstring layoutname = lex.getDocString();
 312
 313                 font = Font(inherit_font, bp.language);
 314                 change = Change(Change::UNCHANGED);
 315
 316                 DocumentClass const & tclass = bp.documentClass();
 317
 318                 if (layoutname.empty())
 319                         layoutname = tclass.defaultLayoutName();
 320
 321                 if (owner_->forcePlainLayout()) {
 322                         // in this case only the empty layout is allowed
 323                         layoutname = tclass.plainLayoutName();
 324                 } else if (par.usePlainLayout()) {
 325                         // in this case, default layout maps to empty layout
 326                         if (layoutname == tclass.defaultLayoutName())
 327                                 layoutname = tclass.plainLayoutName();
 328                 } else {
 329                         // otherwise, the empty layout maps to the default
 330                         if (layoutname == tclass.plainLayoutName())
 331                                 layoutname = tclass.defaultLayoutName();
 332                 }
 333
 334                 // When we apply an unknown layout to a document, we add this layout to the textclass
 335                 // of this document. For example, when you apply class article to a beamer document,
 336                 // all unknown layouts such as frame will be added to document class article so that
 337                 // these layouts can keep their original names.
 338                 tclass.addLayoutIfNeeded(layoutname);
 339
 340                 par.setLayout(bp.documentClass()[layoutname]);
 341
 342                 // Test whether the layout is obsolete.
 343                 Layout const & layout = par.layout();
 344                 if (!layout.obsoleted_by().empty())
 345                         par.setLayout(bp.documentClass()[layout.obsoleted_by()]);
 346
 347                 par.params().read(lex);
 348
 349         } else if (token == "\\end_layout") {
 350                 LYXERR0("Solitary \\end_layout in line " << lex.lineNumber() << "\n"
 351                        << "Missing \\begin_layout ?");
 352         } else if (token == "\\end_inset") {
 353                 LYXERR0("Solitary \\end_inset in line " << lex.lineNumber() << "\n"
 354                        << "Missing \\begin_inset ?");
 355         } else if (token == "\\begin_inset") {
 356                 Inset * inset = readInset(lex, buf);
 357                 if (inset)
 358                         par.insertInset(par.size(), inset, font, change);
 359                 else {
 360                         lex.eatLine();
 361                         docstring line = lex.getDocString();
 362                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 363                                             par.id(), 0, par.size()));
 364                 }
 365         } else if (token == "\\family") {
 366                 lex.next();
 367                 setLyXFamily(lex.getString(), font.fontInfo());
 368         } else if (token == "\\series") {
 369                 lex.next();
 370                 setLyXSeries(lex.getString(), font.fontInfo());
 371         } else if (token == "\\shape") {
 372                 lex.next();
 373                 setLyXShape(lex.getString(), font.fontInfo());
 374         } else if (token == "\\size") {
 375                 lex.next();
 376                 setLyXSize(lex.getString(), font.fontInfo());
 377         } else if (token == "\\lang") {
 378                 lex.next();
 379                 string const tok = lex.getString();
 380                 Language const * lang = languages.getLanguage(tok);
 381                 if (lang) {
 382                         font.setLanguage(lang);
 383                 } else {
 384                         font.setLanguage(bp.language);
 385                         lex.printError("Unknown language `$$Token'");
 386                 }
 387         } else if (token == "\\numeric") {
 388                 lex.next();
 389                 font.fontInfo().setNumber(setLyXMisc(lex.getString()));
 390         } else if (token == "\\emph") {
 391                 lex.next();
 392                 font.fontInfo().setEmph(setLyXMisc(lex.getString()));
 393         } else if (token == "\\bar") {
 394                 lex.next();
 395                 string const tok = lex.getString();
 396
 397                 if (tok == "under")
 398                         font.fontInfo().setUnderbar(FONT_ON);
 399                 else if (tok == "no")
 400                         font.fontInfo().setUnderbar(FONT_OFF);
 401                 else if (tok == "default")
 402                         font.fontInfo().setUnderbar(FONT_INHERIT);
 403                 else
 404                         lex.printError("Unknown bar font flag "
 405                                        "`$$Token'");
 406         } else if (token == "\\strikeout") {
 407                 lex.next();
 408                 font.fontInfo().setStrikeout(setLyXMisc(lex.getString()));
 409         } else if (token == "\\uuline") {
 410                 lex.next();
 411                 font.fontInfo().setUuline(setLyXMisc(lex.getString()));
 412         } else if (token == "\\uwave") {
 413                 lex.next();
 414                 font.fontInfo().setUwave(setLyXMisc(lex.getString()));
 415         } else if (token == "\\noun") {
 416                 lex.next();
 417                 font.fontInfo().setNoun(setLyXMisc(lex.getString()));
 418         } else if (token == "\\color") {
 419                 lex.next();
 420                 setLyXColor(lex.getString(), font.fontInfo());
 421         } else if (token == "\\SpecialChar") {
 422                 auto_ptr<Inset> inset;
 423                 inset.reset(new InsetSpecialChar);
 424                 inset->read(lex);
 425                 inset->setBuffer(*buf);
 426                 par.insertInset(par.size(), inset.release(), font, change);
 427         } else if (token == "\\backslash") {
 428                 par.appendChar('\\', font, change);
 429         } else if (token == "\\LyXTable") {
 430                 auto_ptr<Inset> inset(new InsetTabular(buf));
 431                 inset->read(lex);
 432                 par.insertInset(par.size(), inset.release(), font, change);
 433         } else if (token == "\\lyxline") {
 434                 auto_ptr<Inset> inset;
 435                 inset.reset(new InsetLine);
 436                 inset->setBuffer(*buf);
 437                 par.insertInset(par.size(), inset.release(), font, change);
 438         } else if (token == "\\change_unchanged") {
 439                 change = Change(Change::UNCHANGED);
 440         } else if (token == "\\change_inserted" || token == "\\change_deleted") {
 441                 lex.eatLine();
 442                 istringstream is(lex.getString());
 443                 unsigned int aid;
 444                 time_t ct;
 445                 is >> aid >> ct;
 446                 map<unsigned int, int> const & am = bp.author_map;
 447                 if (am.find(aid) == am.end()) {
 448                         errorList.push_back(ErrorItem(_("Change tracking error"),
 449                                             bformat(_("Unknown author index for change: %1$d\n"), aid),
 450                                             par.id(), 0, par.size()));
 451                         change = Change(Change::UNCHANGED);
 452                 } else {
 453                         if (token == "\\change_inserted")
 454                                 change = Change(Change::INSERTED, am.find(aid)->second, ct);
 455                         else
 456                                 change = Change(Change::DELETED, am.find(aid)->second, ct);
 457                 }
 458         } else {
 459                 lex.eatLine();
 460                 errorList.push_back(ErrorItem(_("Unknown token"),
 461                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 462                         lex.getDocString()),
 463                         par.id(), 0, par.size()));
 464         }
 465 }
 466
 467
 468 void Text::readParagraph(Paragraph & par, Lexer & lex,
 469         ErrorList & errorList)
 470 {
 471         lex.nextToken();
 472         string token = lex.getString();
 473         Font font;
 474         Change change(Change::UNCHANGED);
 475
 476         while (lex.isOK()) {
 477                 readParToken(par, lex, token, font, change, errorList);
 478
 479                 lex.nextToken();
 480                 token = lex.getString();
 481
 482                 if (token.empty())
 483                         continue;
 484
 485                 if (token == "\\end_layout") {
 486                         //Ok, paragraph finished
 487                         break;
 488                 }
 489
 490                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 491                 if (token == "\\begin_layout" || token == "\\end_document"
 492                     || token == "\\end_inset" || token == "\\begin_deeper"
 493                     || token == "\\end_deeper") {
 494                         lex.pushToken(token);
 495                         lyxerr << "Paragraph ended in line "
 496                                << lex.lineNumber() << "\n"
 497                                << "Missing \\end_layout.\n";
 498                         break;
 499                 }
 500         }
 501         // Final change goes to paragraph break:
 502         par.setChange(par.size(), change);
 503
 504         // Initialize begin_of_body_ on load; redoParagraph maintains
 505         par.setBeginOfBody();
 506 }
 507
 508
 509 class TextCompletionList : public CompletionList
 510 {
 511 public:
 512         ///
 513         TextCompletionList(Cursor const & cur, WordList const * list)
 514                 : buffer_(cur.buffer()), pos_(0), list_(list)
 515         {}
 516         ///
 517         virtual ~TextCompletionList() {}
 518
 519         ///
 520         virtual bool sorted() const { return true; }
 521         ///
 522         virtual size_t size() const
 523         {
 524                 return list_->size();
 525         }
 526         ///
 527         virtual docstring const & data(size_t idx) const
 528         {
 529                 return list_->word(idx);
 530         }
 531
 532 private:
 533         ///
 534         Buffer const * buffer_;
 535         ///
 536         size_t pos_;
 537         ///
 538         WordList const * list_;
 539 };
 540
 541
 542 bool Text::empty() const
 543 {
 544         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 545                 // FIXME: Should we consider the labeled type as empty too?
 546                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 547 }
 548
 549
 550 double Text::spacing(Paragraph const & par) const
 551 {
 552         if (par.params().spacing().isDefault())
 553                 return owner_->buffer().params().spacing().getValue();
 554         return par.params().spacing().getValue();
 555 }
 556
 557
 558 /**
 559  * This breaks a paragraph at the specified position.
 560  * The new paragraph will:
 561  * - Decrease depth by one (or change layout to default layout) when
 562  *    keep_layout == false
 563  * - keep current depth and layout when keep_layout == true
 564  */
 565 static void breakParagraph(Text & text, pit_type par_offset, pos_type pos,
 566                     bool keep_layout)
 567 {
 568         BufferParams const & bparams = text.inset().buffer().params();
 569         ParagraphList & pars = text.paragraphs();
 570         // create a new paragraph, and insert into the list
 571         ParagraphList::iterator tmp =
 572                 pars.insert(boost::next(pars.begin(), par_offset + 1),
 573                             Paragraph());
 574
 575         Paragraph & par = pars[par_offset];
 576
 577         // remember to set the inset_owner
 578         tmp->setInsetOwner(&par.inInset());
 579         // without doing that we get a crash when typing <Return> at the
 580         // end of a paragraph
 581         tmp->setPlainOrDefaultLayout(bparams.documentClass());
 582
 583         // layout stays the same with latex-environments
 584         if (keep_layout) {
 585                 tmp->setLayout(par.layout());
 586                 tmp->setLabelWidthString(par.params().labelWidthString());
 587                 tmp->params().depth(par.params().depth());
 588         } else if (par.params().depth() > 0) {
 589                 Paragraph const & hook = pars[text.outerHook(par_offset)];
 590                 tmp->setLayout(hook.layout());
 591                 // not sure the line below is useful
 592                 tmp->setLabelWidthString(par.params().labelWidthString());
 593                 tmp->params().depth(hook.params().depth());
 594         }
 595
 596         bool const isempty = (par.allowEmpty() && par.empty());
 597
 598         if (!isempty && (par.size() > pos || par.empty())) {
 599                 tmp->setLayout(par.layout());
 600                 tmp->params().align(par.params().align());
 601                 tmp->setLabelWidthString(par.params().labelWidthString());
 602
 603                 tmp->params().depth(par.params().depth());
 604                 tmp->params().noindent(par.params().noindent());
 605
 606                 // move everything behind the break position
 607                 // to the new paragraph
 608
 609                 /* Note: if !keepempty, empty() == true, then we reach
 610                  * here with size() == 0. So pos_end becomes - 1. This
 611                  * doesn't cause problems because both loops below
 612                  * enforce pos <= pos_end and 0 <= pos
 613                  */
 614                 pos_type pos_end = par.size() - 1;
 615
 616                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 617                         if (moveItem(par, pos, *tmp, j, bparams)) {
 618                                 ++j;
 619                         }
 620                 }
 621         }
 622
 623         // Move over the end-of-par change information
 624         tmp->setChange(tmp->size(), par.lookupChange(par.size()));
 625         par.setChange(par.size(), Change(bparams.trackChanges ?
 626                                            Change::INSERTED : Change::UNCHANGED));
 627
 628         if (pos) {
 629                 // Make sure that we keep the language when
 630                 // breaking paragraph.
 631                 if (tmp->empty()) {
 632                         Font changed = tmp->getFirstFontSettings(bparams);
 633                         Font const & old = par.getFontSettings(bparams, par.size());
 634                         changed.setLanguage(old.language());
 635                         tmp->setFont(0, changed);
 636                 }
 637
 638                 return;
 639         }
 640
 641         if (!isempty) {
 642                 bool const soa = par.params().startOfAppendix();
 643                 par.params().clear();
 644                 // do not lose start of appendix marker (bug 4212)
 645                 par.params().startOfAppendix(soa);
 646                 par.setPlainOrDefaultLayout(bparams.documentClass());
 647         }
 648
 649         // layout stays the same with latex-environments
 650         if (keep_layout) {
 651                 par.setLayout(tmp->layout());
 652                 par.setLabelWidthString(tmp->params().labelWidthString());
 653                 par.params().depth(tmp->params().depth());
 654         }
 655 }
 656
 657
 658 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 659 {
 660         LASSERT(this == cur.text(), /**/);
 661
 662         Paragraph & cpar = cur.paragraph();
 663         pit_type cpit = cur.pit();
 664
 665         DocumentClass const & tclass = cur.buffer()->params().documentClass();
 666         Layout const & layout = cpar.layout();
 667
 668         if (cur.lastpos() == 0 && !cpar.allowEmpty()) {
 669                 if (changeDepthAllowed(cur, DEC_DEPTH))
 670                         changeDepth(cur, DEC_DEPTH);
 671                 else
 672                         setLayout(cur, tclass.defaultLayoutName());
 673                 return;
 674         }
 675
 676         // a layout change may affect also the following paragraph
 677         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 678
 679         // Always break behind a space
 680         // It is better to erase the space (Dekel)
 681         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 682                 cpar.eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
 683
 684         // What should the layout for the new paragraph be?
 685         bool keep_layout = inverse_logic ?
 686                 !layout.isEnvironment()
 687                 : layout.isEnvironment();
 688
 689         // We need to remember this before we break the paragraph, because
 690         // that invalidates the layout variable
 691         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 692
 693         // we need to set this before we insert the paragraph.
 694         bool const isempty = cpar.allowEmpty() && cpar.empty();
 695
 696         lyx::breakParagraph(*this, cpit, cur.pos(), keep_layout);
 697
 698         // After this, neither paragraph contains any rows!
 699
 700         cpit = cur.pit();
 701         pit_type next_par = cpit + 1;
 702
 703         // well this is the caption hack since one caption is really enough
 704         if (sensitive) {
 705                 if (cur.pos() == 0)
 706                         // set to standard-layout
 707                 //FIXME Check if this should be plainLayout() in some cases
 708                         pars_[cpit].applyLayout(tclass.defaultLayout());
 709                 else
 710                         // set to standard-layout
 711                         //FIXME Check if this should be plainLayout() in some cases
 712                         pars_[next_par].applyLayout(tclass.defaultLayout());
 713         }
 714
 715         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 716                 if (!pars_[next_par].eraseChar(0, cur.buffer()->params().trackChanges))
 717                         break; // the character couldn't be deleted physically due to change tracking
 718         }
 719
 720         cur.buffer()->updateBuffer();
 721
 722         // A singlePar update is not enough in this case.
 723         cur.updateFlags(Update::Force);
 724
 725         // This check is necessary. Otherwise the new empty paragraph will
 726         // be deleted automatically. And it is more friendly for the user!
 727         if (cur.pos() != 0 || isempty)
 728                 setCursor(cur, cur.pit() + 1, 0);
 729         else
 730                 setCursor(cur, cur.pit(), 0);
 731 }
 732
 733
 734 // needed to insert the selection
 735 void Text::insertStringAsLines(DocIterator const & dit, docstring const & str,
 736                 Font const & font)
 737 {
 738         BufferParams const & bparams = owner_->buffer().params();
 739         pit_type pit = dit.pit();
 740         pos_type pos = dit.pos();
 741
 742         // insert the string, don't insert doublespace
 743         bool space_inserted = true;
 744         for (docstring::const_iterator cit = str.begin();
 745             cit != str.end(); ++cit) {
 746                 Paragraph & par = pars_[pit];
 747                 if (*cit == '\n') {
 748                         if (autoBreakRows_ && (!par.empty() || par.allowEmpty())) {
 749                                 lyx::breakParagraph(*this, pit, pos,
 750                                         par.layout().isEnvironment());
 751                                 ++pit;
 752                                 pos = 0;
 753                                 space_inserted = true;
 754                         } else {
 755                                 continue;
 756                         }
 757                         // do not insert consecutive spaces if !free_spacing
 758                 } else if ((*cit == ' ' || *cit == '\t') &&
 759                            space_inserted && !par.isFreeSpacing()) {
 760                         continue;
 761                 } else if (*cit == '\t') {
 762                         if (!par.isFreeSpacing()) {
 763                                 // tabs are like spaces here
 764                                 par.insertChar(pos, ' ', font, bparams.trackChanges);
 765                                 ++pos;
 766                                 space_inserted = true;
 767                         } else {
 768                                 par.insertChar(pos, *cit, font, bparams.trackChanges);
 769                                 ++pos;
 770                                 space_inserted = true;
 771                         }
 772                 } else if (!isPrintable(*cit)) {
 773                         // Ignore unprintables
 774                         continue;
 775                 } else {
 776                         // just insert the character
 777                         par.insertChar(pos, *cit, font, bparams.trackChanges);
 778                         ++pos;
 779                         space_inserted = (*cit == ' ');
 780                 }
 781         }
 782 }
 783
 784
 785 // turn double CR to single CR, others are converted into one
 786 // blank. Then insertStringAsLines is called
 787 void Text::insertStringAsParagraphs(DocIterator const & dit, docstring const & str,
 788                 Font const & font)
 789 {
 790         docstring linestr = str;
 791         bool newline_inserted = false;
 792
 793         for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 794                 if (linestr[i] == '\n') {
 795                         if (newline_inserted) {
 796                                 // we know that \r will be ignored by
 797                                 // insertStringAsLines. Of course, it is a dirty
 798                                 // trick, but it works...
 799                                 linestr[i - 1] = '\r';
 800                                 linestr[i] = '\n';
 801                         } else {
 802                                 linestr[i] = ' ';
 803                                 newline_inserted = true;
 804                         }
 805                 } else if (isPrintable(linestr[i])) {
 806                         newline_inserted = false;
 807                 }
 808         }
 809         insertStringAsLines(dit, linestr, font);
 810 }
 811
 812
 813 // insert a character, moves all the following breaks in the
 814 // same Paragraph one to the right and make a rebreak
 815 void Text::insertChar(Cursor & cur, char_type c)
 816 {
 817         LASSERT(this == cur.text(), /**/);
 818
 819         cur.recordUndo(INSERT_UNDO);
 820
 821         TextMetrics const & tm = cur.bv().textMetrics(this);
 822         Buffer const & buffer = *cur.buffer();
 823         Paragraph & par = cur.paragraph();
 824         // try to remove this
 825         pit_type const pit = cur.pit();
 826
 827         bool const freeSpacing = par.layout().free_spacing ||
 828                 par.isFreeSpacing();
 829
 830         if (lyxrc.auto_number) {
 831                 static docstring const number_operators = from_ascii("+-/*");
 832                 static docstring const number_unary_operators = from_ascii("+-");
 833                 static docstring const number_seperators = from_ascii(".,:");
 834
 835                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 836                         if (!isDigit(c) && !contains(number_operators, c) &&
 837                             !(contains(number_seperators, c) &&
 838                               cur.pos() != 0 &&
 839                               cur.pos() != cur.lastpos() &&
 840                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 841                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 842                            )
 843                                 number(cur); // Set current_font.number to OFF
 844                 } else if (isDigit(c) &&
 845                            cur.real_current_font.isVisibleRightToLeft()) {
 846                         number(cur); // Set current_font.number to ON
 847
 848                         if (cur.pos() != 0) {
 849                                 char_type const c = par.getChar(cur.pos() - 1);
 850                                 if (contains(number_unary_operators, c) &&
 851                                     (cur.pos() == 1
 852                                      || par.isSeparator(cur.pos() - 2)
 853                                      || par.isNewline(cur.pos() - 2))
 854                                   ) {
 855                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 856                                                 tm.font_);
 857                                 } else if (contains(number_seperators, c)
 858                                      && cur.pos() >= 2
 859                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 860                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 861                                                 tm.font_);
 862                                 }
 863                         }
 864                 }
 865         }
 866
 867         // In Bidi text, we want spaces to be treated in a special way: spaces
 868         // which are between words in different languages should get the
 869         // paragraph's language; otherwise, spaces should keep the language
 870         // they were originally typed in. This is only in effect while typing;
 871         // after the text is already typed in, the user can always go back and
 872         // explicitly set the language of a space as desired. But 99.9% of the
 873         // time, what we're doing here is what the user actually meant.
 874         //
 875         // The following cases are the ones in which the language of the space
 876         // should be changed to match that of the containing paragraph. In the
 877         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 878         // represents a space, pipe (|) represents the cursor position (so the
 879         // character before it is the one just typed in). The different cases
 880         // are depicted logically (not visually), from left to right:
 881         //
 882         // 1. A_a|
 883         // 2. a_A|
 884         //
 885         // Theoretically, there are other situations that we should, perhaps, deal
 886         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 887         // point (to understand why, just try to create this situation...).
 888
 889         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 890                 // get font in front and behind the space in question. But do NOT
 891                 // use getFont(cur.pos()) because the character c is not inserted yet
 892                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 893                 Font const & post_space_font = cur.real_current_font;
 894                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 895                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 896
 897                 if (pre_space_rtl != post_space_rtl) {
 898                         // Set the space's language to match the language of the
 899                         // adjacent character whose direction is the paragraph's
 900                         // direction; don't touch other properties of the font
 901                         Language const * lang =
 902                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 903                                 pre_space_font.language() : post_space_font.language();
 904
 905                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
 906                         space_font.setLanguage(lang);
 907                         par.setFont(cur.pos() - 1, space_font);
 908                 }
 909         }
 910
 911         // Next check, if there will be two blanks together or a blank at
 912         // the beginning of a paragraph.
 913         // I decided to handle blanks like normal characters, the main
 914         // difference are the special checks when calculating the row.fill
 915         // (blank does not count at the end of a row) and the check here
 916
 917         // When the free-spacing option is set for the current layout,
 918         // disable the double-space checking
 919         if (!freeSpacing && isLineSeparatorChar(c)) {
 920                 if (cur.pos() == 0) {
 921                         static bool sent_space_message = false;
 922                         if (!sent_space_message) {
 923                                 cur.message(_("You cannot insert a space at the "
 924                                                            "beginning of a paragraph. Please read the Tutorial."));
 925                                 sent_space_message = true;
 926                         }
 927                         return;
 928                 }
 929                 LASSERT(cur.pos() > 0, /**/);
 930                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 931                     && !par.isDeleted(cur.pos() - 1)) {
 932                         static bool sent_space_message = false;
 933                         if (!sent_space_message) {
 934                                 cur.message(_("You cannot type two spaces this way. "
 935                                                            "Please read the Tutorial."));
 936                                 sent_space_message = true;
 937                         }
 938                         return;
 939                 }
 940         }
 941
 942         par.insertChar(cur.pos(), c, cur.current_font,
 943                 cur.buffer()->params().trackChanges);
 944         cur.checkBufferStructure();
 945
 946 //              cur.updateFlags(Update::Force);
 947         bool boundary = cur.boundary()
 948                 || tm.isRTLBoundary(cur.pit(), cur.pos() + 1);
 949         setCursor(cur, cur.pit(), cur.pos() + 1, false, boundary);
 950         charInserted(cur);
 951 }
 952
 953
 954 void Text::charInserted(Cursor & cur)
 955 {
 956         Paragraph & par = cur.paragraph();
 957
 958         // Here we call finishUndo for every 20 characters inserted.
 959         // This is from my experience how emacs does it. (Lgb)
 960         if (undo_counter_ < 20) {
 961                 ++undo_counter_;
 962         } else {
 963                 cur.finishUndo();
 964                 undo_counter_ = 0;
 965         }
 966
 967         // register word if a non-letter was entered
 968         if (cur.pos() > 1
 969             && !par.isWordSeparator(cur.pos() - 2)
 970             && par.isWordSeparator(cur.pos() - 1)) {
 971                 // get the word in front of cursor
 972                 LASSERT(this == cur.text(), /**/);
 973                 cur.paragraph().updateWords();
 974         }
 975 }
 976
 977
 978 // the cursor set functions have a special mechanism. When they
 979 // realize, that you left an empty paragraph, they will delete it.
 980
 981 bool Text::cursorForwardOneWord(Cursor & cur)
 982 {
 983         LASSERT(this == cur.text(), /**/);
 984
 985         pos_type const lastpos = cur.lastpos();
 986         pit_type pit = cur.pit();
 987         pos_type pos = cur.pos();
 988         Paragraph const & par = cur.paragraph();
 989
 990         // Paragraph boundary is a word boundary
 991         if (pos == lastpos) {
 992                 if (pit != cur.lastpit())
 993                         return setCursor(cur, pit + 1, 0);
 994                 else
 995                         return false;
 996         }
 997
 998         if (lyxrc.mac_like_word_movement) {
 999                 // Skip through trailing punctuation and spaces.
1000                 while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
1001                         ++pos;
1002
1003                 // Skip over either a non-char inset or a full word
1004                 if (pos != lastpos && par.isWordSeparator(pos))
1005                         ++pos;
1006                 else while (pos != lastpos && !par.isWordSeparator(pos))
1007                              ++pos;
1008         } else {
1009                 LASSERT(pos < lastpos, /**/); // see above
1010                 if (!par.isWordSeparator(pos))
1011                         while (pos != lastpos && !par.isWordSeparator(pos))
1012                                 ++pos;
1013                 else if (par.isChar(pos))
1014                         while (pos != lastpos && par.isChar(pos))
1015                                 ++pos;
1016                 else if (!par.isSpace(pos)) // non-char inset
1017                         ++pos;
1018
1019                 // Skip over white space
1020                 while (pos != lastpos && par.isSpace(pos))
1021                              ++pos;
1022         }
1023
1024         return setCursor(cur, pit, pos);
1025 }
1026
1027
1028 bool Text::cursorBackwardOneWord(Cursor & cur)
1029 {
1030         LASSERT(this == cur.text(), /**/);
1031
1032         pit_type pit = cur.pit();
1033         pos_type pos = cur.pos();
1034         Paragraph & par = cur.paragraph();
1035
1036         // Paragraph boundary is a word boundary
1037         if (pos == 0 && pit != 0)
1038                 return setCursor(cur, pit - 1, getPar(pit - 1).size());
1039
1040         if (lyxrc.mac_like_word_movement) {
1041                 // Skip through punctuation and spaces.
1042                 while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
1043                         --pos;
1044
1045                 // Skip over either a non-char inset or a full word
1046                 if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
1047                         --pos;
1048                 else while (pos != 0 && !par.isWordSeparator(pos - 1))
1049                              --pos;
1050         } else {
1051                 // Skip over white space
1052                 while (pos != 0 && par.isSpace(pos - 1))
1053                              --pos;
1054
1055                 if (pos != 0 && !par.isWordSeparator(pos - 1))
1056                         while (pos != 0 && !par.isWordSeparator(pos - 1))
1057                                 --pos;
1058                 else if (pos != 0 && par.isChar(pos - 1))
1059                         while (pos != 0 && par.isChar(pos - 1))
1060                                 --pos;
1061                 else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
1062                         --pos;
1063         }
1064
1065         return setCursor(cur, pit, pos);
1066 }
1067
1068
1069 bool Text::cursorVisLeftOneWord(Cursor & cur)
1070 {
1071         LASSERT(this == cur.text(), /**/);
1072
1073         pos_type left_pos, right_pos;
1074         bool left_is_letter, right_is_letter;
1075
1076         Cursor temp_cur = cur;
1077
1078         // always try to move at least once...
1079         while (temp_cur.posVisLeft(true /* skip_inset */)) {
1080
1081                 // collect some information about current cursor position
1082                 temp_cur.getSurroundingPos(left_pos, right_pos);
1083                 left_is_letter =
1084                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1085                 right_is_letter =
1086                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1087
1088                 // if we're not at a letter/non-letter boundary, continue moving
1089                 if (left_is_letter == right_is_letter)
1090                         continue;
1091
1092                 // we should stop when we have an LTR word on our right or an RTL word
1093                 // on our left
1094                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1095                                 temp_cur.buffer()->params(), left_pos).isRightToLeft())
1096                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1097                                 temp_cur.buffer()->params(), right_pos).isRightToLeft()))
1098                         break;
1099         }
1100
1101         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1102                                          true, temp_cur.boundary());
1103 }
1104
1105
1106 bool Text::cursorVisRightOneWord(Cursor & cur)
1107 {
1108         LASSERT(this == cur.text(), /**/);
1109
1110         pos_type left_pos, right_pos;
1111         bool left_is_letter, right_is_letter;
1112
1113         Cursor temp_cur = cur;
1114
1115         // always try to move at least once...
1116         while (temp_cur.posVisRight(true /* skip_inset */)) {
1117
1118                 // collect some information about current cursor position
1119                 temp_cur.getSurroundingPos(left_pos, right_pos);
1120                 left_is_letter =
1121                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1122                 right_is_letter =
1123                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1124
1125                 // if we're not at a letter/non-letter boundary, continue moving
1126                 if (left_is_letter == right_is_letter)
1127                         continue;
1128
1129                 // we should stop when we have an LTR word on our right or an RTL word
1130                 // on our left
1131                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1132                                 temp_cur.buffer()->params(),
1133                                 left_pos).isRightToLeft())
1134                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1135                                 temp_cur.buffer()->params(),
1136                                 right_pos).isRightToLeft()))
1137                         break;
1138         }
1139
1140         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1141                                          true, temp_cur.boundary());
1142 }
1143
1144
1145 void Text::selectWord(Cursor & cur, word_location loc)
1146 {
1147         LASSERT(this == cur.text(), /**/);
1148         CursorSlice from = cur.top();
1149         CursorSlice to = cur.top();
1150         getWord(from, to, loc);
1151         if (cur.top() != from)
1152                 setCursor(cur, from.pit(), from.pos());
1153         if (to == from)
1154                 return;
1155         if (!cur.selection())
1156                 cur.resetAnchor();
1157         setCursor(cur, to.pit(), to.pos());
1158         cur.setSelection();
1159         cur.setWordSelection(true);
1160 }
1161
1162
1163 void Text::selectAll(Cursor & cur)
1164 {
1165         LASSERT(this == cur.text(), /**/);
1166         if (cur.lastpos() == 0 && cur.lastpit() == 0)
1167                 return;
1168         // If the cursor is at the beginning, make sure the cursor ends there
1169         if (cur.pit() == 0 && cur.pos() == 0) {
1170                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1171                 cur.resetAnchor();
1172                 setCursor(cur, 0, 0);
1173         } else {
1174                 setCursor(cur, 0, 0);
1175                 cur.resetAnchor();
1176                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1177         }
1178         cur.setSelection();
1179 }
1180
1181
1182 // Select the word currently under the cursor when no
1183 // selection is currently set
1184 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
1185 {
1186         LASSERT(this == cur.text(), /**/);
1187         if (cur.selection())
1188                 return false;
1189         selectWord(cur, loc);
1190         return cur.selection();
1191 }
1192
1193
1194 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
1195 {
1196         LASSERT(this == cur.text(), /**/);
1197
1198         if (!cur.selection()) {
1199                 bool const changed = cur.paragraph().isChanged(cur.pos());
1200                 if (!(changed && findNextChange(&cur.bv())))
1201                         return;
1202         }
1203
1204         cur.recordUndoSelection();
1205
1206         pit_type begPit = cur.selectionBegin().pit();
1207         pit_type endPit = cur.selectionEnd().pit();
1208
1209         pos_type begPos = cur.selectionBegin().pos();
1210         pos_type endPos = cur.selectionEnd().pos();
1211
1212         // keep selection info, because endPos becomes invalid after the first loop
1213         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
1214
1215         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
1216
1217         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1218                 pos_type parSize = pars_[pit].size();
1219
1220                 // ignore empty paragraphs; otherwise, an assertion will fail for
1221                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
1222                 if (parSize == 0)
1223                         continue;
1224
1225                 // do not consider first paragraph if the cursor starts at pos size()
1226                 if (pit == begPit && begPos == parSize)
1227                         continue;
1228
1229                 // do not consider last paragraph if the cursor ends at pos 0
1230                 if (pit == endPit && endPos == 0)
1231                         break; // last iteration anyway
1232
1233                 pos_type left  = (pit == begPit ? begPos : 0);
1234                 pos_type right = (pit == endPit ? endPos : parSize);
1235
1236                 if (op == ACCEPT) {
1237                         pars_[pit].acceptChanges(left, right);
1238                 } else {
1239                         pars_[pit].rejectChanges(left, right);
1240                 }
1241         }
1242
1243         // next, accept/reject imaginary end-of-par characters
1244
1245         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1246                 pos_type pos = pars_[pit].size();
1247
1248                 // skip if the selection ends before the end-of-par
1249                 if (pit == endPit && endsBeforeEndOfPar)
1250                         break; // last iteration anyway
1251
1252                 // skip if this is not the last paragraph of the document
1253                 // note: the user should be able to accept/reject the par break of the last par!
1254                 if (pit == endPit && pit + 1 != int(pars_.size()))
1255                         break; // last iteration anway
1256
1257                 if (op == ACCEPT) {
1258                         if (pars_[pit].isInserted(pos)) {
1259                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1260                         } else if (pars_[pit].isDeleted(pos)) {
1261                                 if (pit + 1 == int(pars_.size())) {
1262                                         // we cannot remove a par break at the end of the last paragraph;
1263                                         // instead, we mark it unchanged
1264                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1265                                 } else {
1266                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1267                                         --endPit;
1268                                         --pit;
1269                                 }
1270                         }
1271                 } else {
1272                         if (pars_[pit].isDeleted(pos)) {
1273                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1274                         } else if (pars_[pit].isInserted(pos)) {
1275                                 if (pit + 1 == int(pars_.size())) {
1276                                         // we mark the par break at the end of the last paragraph unchanged
1277                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1278                                 } else {
1279                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1280                                         --endPit;
1281                                         --pit;
1282                                 }
1283                         }
1284                 }
1285         }
1286
1287         // finally, invoke the DEPM
1288
1289         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().trackChanges);
1290
1291         //
1292
1293         cur.finishUndo();
1294         cur.clearSelection();
1295         setCursorIntern(cur, begPit, begPos);
1296         cur.updateFlags(Update::Force);
1297         cur.buffer()->updateBuffer();
1298 }
1299
1300
1301 void Text::acceptChanges()
1302 {
1303         BufferParams const & bparams = owner_->buffer().params();
1304         lyx::acceptChanges(pars_, bparams);
1305         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
1306 }
1307
1308
1309 void Text::rejectChanges()
1310 {
1311         BufferParams const & bparams = owner_->buffer().params();
1312         pit_type pars_size = static_cast<pit_type>(pars_.size());
1313
1314         // first, reject changes within each individual paragraph
1315         // (do not consider end-of-par)
1316         for (pit_type pit = 0; pit < pars_size; ++pit) {
1317                 if (!pars_[pit].empty())   // prevent assertion failure
1318                         pars_[pit].rejectChanges(0, pars_[pit].size());
1319         }
1320
1321         // next, reject imaginary end-of-par characters
1322         for (pit_type pit = 0; pit < pars_size; ++pit) {
1323                 pos_type pos = pars_[pit].size();
1324
1325                 if (pars_[pit].isDeleted(pos)) {
1326                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1327                 } else if (pars_[pit].isInserted(pos)) {
1328                         if (pit == pars_size - 1) {
1329                                 // we mark the par break at the end of the last
1330                                 // paragraph unchanged
1331                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1332                         } else {
1333                                 mergeParagraph(bparams, pars_, pit);
1334                                 --pit;
1335                                 --pars_size;
1336                         }
1337                 }
1338         }
1339
1340         // finally, invoke the DEPM
1341         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
1342 }
1343
1344
1345 void Text::deleteWordForward(Cursor & cur)
1346 {
1347         LASSERT(this == cur.text(), /**/);
1348         if (cur.lastpos() == 0)
1349                 cursorForward(cur);
1350         else {
1351                 cur.resetAnchor();
1352                 cur.setSelection(true);
1353                 cursorForwardOneWord(cur);
1354                 cur.setSelection();
1355                 cutSelection(cur, true, false);
1356                 cur.checkBufferStructure();
1357         }
1358 }
1359
1360
1361 void Text::deleteWordBackward(Cursor & cur)
1362 {
1363         LASSERT(this == cur.text(), /**/);
1364         if (cur.lastpos() == 0)
1365                 cursorBackward(cur);
1366         else {
1367                 cur.resetAnchor();
1368                 cur.setSelection(true);
1369                 cursorBackwardOneWord(cur);
1370                 cur.setSelection();
1371                 cutSelection(cur, true, false);
1372                 cur.checkBufferStructure();
1373         }
1374 }
1375
1376
1377 // Kill to end of line.
1378 void Text::changeCase(Cursor & cur, TextCase action)
1379 {
1380         LASSERT(this == cur.text(), /**/);
1381         CursorSlice from;
1382         CursorSlice to;
1383
1384         bool gotsel = false;
1385         if (cur.selection()) {
1386                 from = cur.selBegin();
1387                 to = cur.selEnd();
1388                 gotsel = true;
1389         } else {
1390                 from = cur.top();
1391                 getWord(from, to, PARTIAL_WORD);
1392                 cursorForwardOneWord(cur);
1393         }
1394
1395         cur.recordUndoSelection();
1396
1397         pit_type begPit = from.pit();
1398         pit_type endPit = to.pit();
1399
1400         pos_type begPos = from.pos();
1401         pos_type endPos = to.pos();
1402
1403         pos_type right = 0; // needed after the for loop
1404
1405         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1406                 Paragraph & par = pars_[pit];
1407                 pos_type const pos = (pit == begPit ? begPos : 0);
1408                 right = (pit == endPit ? endPos : par.size());
1409                 par.changeCase(cur.buffer()->params(), pos, right, action);
1410         }
1411
1412         // the selection may have changed due to logically-only deleted chars
1413         if (gotsel) {
1414                 setCursor(cur, begPit, begPos);
1415                 cur.resetAnchor();
1416                 setCursor(cur, endPit, right);
1417                 cur.setSelection();
1418         } else
1419                 setCursor(cur, endPit, right);
1420
1421         cur.checkBufferStructure();
1422 }
1423
1424
1425 bool Text::handleBibitems(Cursor & cur)
1426 {
1427         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
1428                 return false;
1429
1430         if (cur.pos() != 0)
1431                 return false;
1432
1433         BufferParams const & bufparams = cur.buffer()->params();
1434         Paragraph const & par = cur.paragraph();
1435         Cursor prevcur = cur;
1436         if (cur.pit() > 0) {
1437                 --prevcur.pit();
1438                 prevcur.pos() = prevcur.lastpos();
1439         }
1440         Paragraph const & prevpar = prevcur.paragraph();
1441
1442         // if a bibitem is deleted, merge with previous paragraph
1443         // if this is a bibliography item as well
1444         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1445                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1446                 mergeParagraph(bufparams, cur.text()->paragraphs(),
1447                                                         prevcur.pit());
1448                 cur.buffer()->updateBuffer();
1449                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1450                 cur.updateFlags(Update::Force);
1451                 return true;
1452         }
1453
1454         // otherwise reset to default
1455         cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
1456         return true;
1457 }
1458
1459
1460 bool Text::erase(Cursor & cur)
1461 {
1462         LASSERT(this == cur.text(), return false);
1463         bool needsUpdate = false;
1464         Paragraph & par = cur.paragraph();
1465
1466         if (cur.pos() != cur.lastpos()) {
1467                 // this is the code for a normal delete, not pasting
1468                 // any paragraphs
1469                 cur.recordUndo(DELETE_UNDO);
1470                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1471                 if(!par.eraseChar(cur.pos(), cur.buffer()->params().trackChanges))
1472                         // the character has been logically deleted only => skip it
1473                         cur.top().forwardPos();
1474
1475                 if (was_inset)
1476                         cur.buffer()->updateBuffer();
1477                 else
1478                         cur.checkBufferStructure();
1479                 needsUpdate = true;
1480         } else {
1481                 if (cur.pit() == cur.lastpit())
1482                         return dissolveInset(cur);
1483
1484                 if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1485                         par.setChange(cur.pos(), Change(Change::DELETED));
1486                         cur.forwardPos();
1487                         needsUpdate = true;
1488                 } else {
1489                         setCursorIntern(cur, cur.pit() + 1, 0);
1490                         needsUpdate = backspacePos0(cur);
1491                 }
1492         }
1493
1494         needsUpdate |= handleBibitems(cur);
1495
1496         if (needsUpdate) {
1497                 // Make sure the cursor is correct. Is this really needed?
1498                 // No, not really... at least not here!
1499                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1500                 cur.checkBufferStructure();
1501         }
1502
1503         return needsUpdate;
1504 }
1505
1506
1507 bool Text::backspacePos0(Cursor & cur)
1508 {
1509         LASSERT(this == cur.text(), /**/);
1510         if (cur.pit() == 0)
1511                 return false;
1512
1513         bool needsUpdate = false;
1514
1515         BufferParams const & bufparams = cur.buffer()->params();
1516         DocumentClass const & tclass = bufparams.documentClass();
1517         ParagraphList & plist = cur.text()->paragraphs();
1518         Paragraph const & par = cur.paragraph();
1519         Cursor prevcur = cur;
1520         --prevcur.pit();
1521         prevcur.pos() = prevcur.lastpos();
1522         Paragraph const & prevpar = prevcur.paragraph();
1523
1524         // is it an empty paragraph?
1525         if (cur.lastpos() == 0
1526             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1527                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1528                 plist.erase(boost::next(plist.begin(), cur.pit()));
1529                 needsUpdate = true;
1530         }
1531         // is previous par empty?
1532         else if (prevcur.lastpos() == 0
1533                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1534                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1535                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1536                 needsUpdate = true;
1537         }
1538         // Pasting is not allowed, if the paragraphs have different
1539         // layouts. I think it is a real bug of all other
1540         // word processors to allow it. It confuses the user.
1541         // Correction: Pasting is always allowed with standard-layout
1542         // or the empty layout.
1543         else if (par.layout() == prevpar.layout()
1544                  || tclass.isDefaultLayout(par.layout())
1545                  || tclass.isPlainLayout(par.layout())) {
1546                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1547                 mergeParagraph(bufparams, plist, prevcur.pit());
1548                 needsUpdate = true;
1549         }
1550
1551         if (needsUpdate) {
1552                 cur.buffer()->updateBuffer();
1553                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1554         }
1555
1556         return needsUpdate;
1557 }
1558
1559
1560 bool Text::backspace(Cursor & cur)
1561 {
1562         LASSERT(this == cur.text(), /**/);
1563         bool needsUpdate = false;
1564         if (cur.pos() == 0) {
1565                 if (cur.pit() == 0)
1566                         return dissolveInset(cur);
1567
1568                 Paragraph & prev_par = pars_[cur.pit() - 1];
1569
1570                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1571                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1572                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1573                         return true;
1574                 }
1575                 // The cursor is at the beginning of a paragraph, so
1576                 // the backspace will collapse two paragraphs into one.
1577                 needsUpdate = backspacePos0(cur);
1578
1579         } else {
1580                 // this is the code for a normal backspace, not pasting
1581                 // any paragraphs
1582                 cur.recordUndo(DELETE_UNDO);
1583                 // We used to do cursorBackwardIntern() here, but it is
1584                 // not a good idea since it triggers the auto-delete
1585                 // mechanism. So we do a cursorBackwardIntern()-lite,
1586                 // without the dreaded mechanism. (JMarc)
1587                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1588                                 false, cur.boundary());
1589                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1590                 cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
1591                 if (was_inset)
1592                         cur.buffer()->updateBuffer();
1593                 else
1594                         cur.checkBufferStructure();
1595         }
1596
1597         if (cur.pos() == cur.lastpos())
1598                 cur.setCurrentFont();
1599
1600         needsUpdate |= handleBibitems(cur);
1601
1602         // A singlePar update is not enough in this case.
1603 //              cur.updateFlags(Update::Force);
1604         setCursor(cur.top(), cur.pit(), cur.pos());
1605
1606         return needsUpdate;
1607 }
1608
1609
1610 bool Text::dissolveInset(Cursor & cur)
1611 {
1612         LASSERT(this == cur.text(), return false);
1613
1614         if (isMainText() || cur.inset().nargs() != 1)
1615                 return false;
1616
1617         cur.recordUndoInset();
1618         cur.setMark(false);
1619         cur.selHandle(false);
1620         // save position
1621         pos_type spos = cur.pos();
1622         pit_type spit = cur.pit();
1623         ParagraphList plist;
1624         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1625                 plist = paragraphs();
1626         cur.popBackward();
1627         // store cursor offset
1628         if (spit == 0)
1629                 spos += cur.pos();
1630         spit += cur.pit();
1631         Buffer & b = *cur.buffer();
1632         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1633         if (!plist.empty()) {
1634                 // ERT paragraphs have the Language latex_language.
1635                 // This is invalid outside of ERT, so we need to
1636                 // change it to the buffer language.
1637                 ParagraphList::iterator it = plist.begin();
1638                 ParagraphList::iterator it_end = plist.end();
1639                 for (; it != it_end; it++)
1640                         it->changeLanguage(b.params(), latex_language, b.language());
1641
1642                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1643                                    b.errorList("Paste"));
1644                 // restore position
1645                 cur.pit() = min(cur.lastpit(), spit);
1646                 cur.pos() = min(cur.lastpos(), spos);
1647         } else
1648                 // this is the least that needs to be done (bug 6003)
1649                 // in the above case, pasteParagraphList handles this
1650                 cur.buffer()->updateBuffer();
1651
1652         // Ensure the current language is set correctly (bug 6292)
1653         cur.text()->setCursor(cur, cur.pit(), cur.pos());
1654         cur.clearSelection();
1655         cur.resetAnchor();
1656         return true;
1657 }
1658
1659
1660 void Text::getWord(CursorSlice & from, CursorSlice & to,
1661         word_location const loc) const
1662 {
1663         to = from;
1664         pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
1665 }
1666
1667
1668 void Text::write(ostream & os) const
1669 {
1670         Buffer const & buf = owner_->buffer();
1671         ParagraphList::const_iterator pit = paragraphs().begin();
1672         ParagraphList::const_iterator end = paragraphs().end();
1673         depth_type dth = 0;
1674         for (; pit != end; ++pit)
1675                 pit->write(os, buf.params(), dth);
1676
1677         // Close begin_deeper
1678         for(; dth > 0; --dth)
1679                 os << "\n\\end_deeper";
1680 }
1681
1682
1683 bool Text::read(Lexer & lex,
1684                 ErrorList & errorList, InsetText * insetPtr)
1685 {
1686         Buffer const & buf = owner_->buffer();
1687         depth_type depth = 0;
1688         bool res = true;
1689
1690         while (lex.isOK()) {
1691                 lex.nextToken();
1692                 string const token = lex.getString();
1693
1694                 if (token.empty())
1695                         continue;
1696
1697                 if (token == "\\end_inset")
1698                         break;
1699
1700                 if (token == "\\end_body")
1701                         continue;
1702
1703                 if (token == "\\begin_body")
1704                         continue;
1705
1706                 if (token == "\\end_document") {
1707                         res = false;
1708                         break;
1709                 }
1710
1711                 if (token == "\\begin_layout") {
1712                         lex.pushToken(token);
1713
1714                         Paragraph par;
1715                         par.setInsetOwner(insetPtr);
1716                         par.params().depth(depth);
1717                         par.setFont(0, Font(inherit_font, buf.params().language));
1718                         pars_.push_back(par);
1719                         readParagraph(pars_.back(), lex, errorList);
1720
1721                         // register the words in the global word list
1722                         pars_.back().updateWords();
1723                 } else if (token == "\\begin_deeper") {
1724                         ++depth;
1725                 } else if (token == "\\end_deeper") {
1726                         if (!depth)
1727                                 lex.printError("\\end_deeper: " "depth is already null");
1728                         else
1729                                 --depth;
1730                 } else {
1731                         LYXERR0("Handling unknown body token: `" << token << '\'');
1732                 }
1733         }
1734
1735         // avoid a crash on weird documents (bug 4859)
1736         if (pars_.empty()) {
1737                 Paragraph par;
1738                 par.setInsetOwner(insetPtr);
1739                 par.params().depth(depth);
1740                 par.setFont(0, Font(inherit_font,
1741                                     buf.params().language));
1742                 par.setPlainOrDefaultLayout(buf.params().documentClass());
1743                 pars_.push_back(par);
1744         }
1745
1746         return res;
1747 }
1748
1749 // Returns the current font and depth as a message.
1750 docstring Text::currentState(Cursor const & cur) const
1751 {
1752         LASSERT(this == cur.text(), /**/);
1753         Buffer & buf = *cur.buffer();
1754         Paragraph const & par = cur.paragraph();
1755         odocstringstream os;
1756
1757         if (buf.params().trackChanges)
1758                 os << _("[Change Tracking] ");
1759
1760         Change change = par.lookupChange(cur.pos());
1761
1762         if (change.changed()) {
1763                 Author const & a = buf.params().authors().get(change.author);
1764                 os << _("Change: ") << a.name();
1765                 if (!a.email().empty())
1766                         os << " (" << a.email() << ")";
1767                 // FIXME ctime is english, we should translate that
1768                 os << _(" at ") << ctime(&change.changetime);
1769                 os << " : ";
1770         }
1771
1772         // I think we should only show changes from the default
1773         // font. (Asger)
1774         // No, from the document font (MV)
1775         Font font = cur.real_current_font;
1776         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1777
1778         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1779
1780         // The paragraph depth
1781         int depth = cur.paragraph().getDepth();
1782         if (depth > 0)
1783                 os << bformat(_(", Depth: %1$d"), depth);
1784
1785         // The paragraph spacing, but only if different from
1786         // buffer spacing.
1787         Spacing const & spacing = par.params().spacing();
1788         if (!spacing.isDefault()) {
1789                 os << _(", Spacing: ");
1790                 switch (spacing.getSpace()) {
1791                 case Spacing::Single:
1792                         os << _("Single");
1793                         break;
1794                 case Spacing::Onehalf:
1795                         os << _("OneHalf");
1796                         break;
1797                 case Spacing::Double:
1798                         os << _("Double");
1799                         break;
1800                 case Spacing::Other:
1801                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1802                         break;
1803                 case Spacing::Default:
1804                         // should never happen, do nothing
1805                         break;
1806                 }
1807         }
1808
1809 #ifdef DEVEL_VERSION
1810         os << _(", Inset: ") << &cur.inset();
1811         os << _(", Paragraph: ") << cur.pit();
1812         os << _(", Id: ") << par.id();
1813         os << _(", Position: ") << cur.pos();
1814         // FIXME: Why is the check for par.size() needed?
1815         // We are called with cur.pos() == par.size() quite often.
1816         if (!par.empty() && cur.pos() < par.size()) {
1817                 // Force output of code point, not character
1818                 size_t const c = par.getChar(cur.pos());
1819                 os << _(", Char: 0x") << hex << c;
1820         }
1821         os << _(", Boundary: ") << cur.boundary();
1822 //      Row & row = cur.textRow();
1823 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1824 #endif
1825         return os.str();
1826 }
1827
1828
1829 docstring Text::getPossibleLabel(Cursor const & cur) const
1830 {
1831         pit_type pit = cur.pit();
1832
1833         Layout const * layout = &(pars_[pit].layout());
1834
1835         docstring text;
1836         docstring par_text = pars_[pit].asString();
1837
1838         // The return string of math matrices might contain linebreaks
1839         par_text = subst(par_text, '\n', '-');
1840         int const numwords = 3;
1841         for (int i = 0; i < numwords; ++i) {
1842                 if (par_text.empty())
1843                         break;
1844                 docstring head;
1845                 par_text = split(par_text, head, ' ');
1846                 // Is it legal to use spaces in labels ?
1847                 if (i > 0)
1848                         text += '-';
1849                 text += head;
1850         }
1851
1852         // Make sure it isn't too long
1853         unsigned int const max_label_length = 32;
1854         if (text.size() > max_label_length)
1855                 text.resize(max_label_length);
1856
1857         // Will contain the label prefix.
1858         docstring name;
1859
1860         // For section, subsection, etc...
1861         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1862                 Layout const * layout2 = &(pars_[pit - 1].layout());
1863                 if (layout2->latextype != LATEX_PARAGRAPH) {
1864                         --pit;
1865                         layout = layout2;
1866                 }
1867         }
1868         if (layout->latextype != LATEX_PARAGRAPH)
1869                 name = layout->refprefix;
1870
1871         // For captions, we just take the caption type
1872         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1873         if (caption_inset) {
1874                 string const & ftype = static_cast<InsetCaption *>(caption_inset)->type();
1875                 FloatList const & fl = cur.buffer()->params().documentClass().floats();
1876                 if (fl.typeExist(ftype)) {
1877                         Floating const & flt = fl.getType(ftype);
1878                         name = from_utf8(flt.refPrefix());
1879                 }
1880                 if (name.empty())
1881                         name = from_utf8(ftype.substr(0,3));
1882         }
1883
1884         // If none of the above worked, see if the inset knows.
1885         if (name.empty()) {
1886                 InsetLayout const & il = cur.inset().getLayout();
1887                 name = il.refprefix();
1888         }
1889
1890         if (!name.empty())
1891                 // FIXME refstyle
1892                 // We should allow customization of the separator or else change it
1893                 text = name + ':' + text;
1894
1895         return text;
1896 }
1897
1898
1899 docstring Text::asString(int options) const
1900 {
1901         return asString(0, pars_.size(), options);
1902 }
1903
1904
1905 docstring Text::asString(pit_type beg, pit_type end, int options) const
1906 {
1907         size_t i = size_t(beg);
1908         docstring str = pars_[i].asString(options);
1909         for (++i; i != size_t(end); ++i) {
1910                 str += '\n';
1911                 str += pars_[i].asString(options);
1912         }
1913         return str;
1914 }
1915
1916
1917
1918 void Text::charsTranspose(Cursor & cur)
1919 {
1920         LASSERT(this == cur.text(), /**/);
1921
1922         pos_type pos = cur.pos();
1923
1924         // If cursor is at beginning or end of paragraph, do nothing.
1925         if (pos == cur.lastpos() || pos == 0)
1926                 return;
1927
1928         Paragraph & par = cur.paragraph();
1929
1930         // Get the positions of the characters to be transposed.
1931         pos_type pos1 = pos - 1;
1932         pos_type pos2 = pos;
1933
1934         // In change tracking mode, ignore deleted characters.
1935         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1936                 ++pos2;
1937         if (pos2 == cur.lastpos())
1938                 return;
1939
1940         while (pos1 >= 0 && par.isDeleted(pos1))
1941                 --pos1;
1942         if (pos1 < 0)
1943                 return;
1944
1945         // Don't do anything if one of the "characters" is not regular text.
1946         if (par.isInset(pos1) || par.isInset(pos2))
1947                 return;
1948
1949         // Store the characters to be transposed (including font information).
1950         char_type const char1 = par.getChar(pos1);
1951         Font const font1 =
1952                 par.getFontSettings(cur.buffer()->params(), pos1);
1953
1954         char_type const char2 = par.getChar(pos2);
1955         Font const font2 =
1956                 par.getFontSettings(cur.buffer()->params(), pos2);
1957
1958         // And finally, we are ready to perform the transposition.
1959         // Track the changes if Change Tracking is enabled.
1960         bool const trackChanges = cur.buffer()->params().trackChanges;
1961
1962         cur.recordUndo();
1963
1964         par.eraseChar(pos2, trackChanges);
1965         par.eraseChar(pos1, trackChanges);
1966         par.insertChar(pos1, char2, font2, trackChanges);
1967         par.insertChar(pos2, char1, font1, trackChanges);
1968
1969         cur.checkBufferStructure();
1970
1971         // After the transposition, move cursor to after the transposition.
1972         setCursor(cur, cur.pit(), pos2);
1973         cur.forwardPos();
1974 }
1975
1976
1977 DocIterator Text::macrocontextPosition() const
1978 {
1979         return macrocontext_position_;
1980 }
1981
1982
1983 void Text::setMacrocontextPosition(DocIterator const & pos)
1984 {
1985         macrocontext_position_ = pos;
1986 }
1987
1988
1989 docstring Text::previousWord(CursorSlice const & sl) const
1990 {
1991         CursorSlice from = sl;
1992         CursorSlice to = sl;
1993         getWord(from, to, PREVIOUS_WORD);
1994         if (sl == from || to == from)
1995                 return docstring();
1996
1997         Paragraph const & par = sl.paragraph();
1998         return par.asString(from.pos(), to.pos());
1999 }
2000
2001
2002 bool Text::completionSupported(Cursor const & cur) const
2003 {
2004         Paragraph const & par = cur.paragraph();
2005         return cur.pos() > 0
2006                 && (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
2007                 && !par.isWordSeparator(cur.pos() - 1);
2008 }
2009
2010
2011 CompletionList const * Text::createCompletionList(Cursor const & cur) const
2012 {
2013         WordList const * list = theWordList(*cur.getFont().language());
2014         return new TextCompletionList(cur, list);
2015 }
2016
2017
2018 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
2019 {
2020         LASSERT(cur.bv().cursor() == cur, /**/);
2021         cur.insert(s);
2022         cur.bv().cursor() = cur;
2023         if (!(cur.disp_.update() & Update::Force))
2024                 cur.updateFlags(cur.disp_.update() | Update::SinglePar);
2025         return true;
2026 }
2027
2028
2029 docstring Text::completionPrefix(Cursor const & cur) const
2030 {
2031         return previousWord(cur.top());
2032 }
2033
2034 } // namespace lyx