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