src/Text.cpp

   1 /**
   2  * \file src/Text.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Dov Feldstern
   9  * \author Jean-Marc Lasgouttes
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Stefan Schimanski
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "Text.h"
  22
  23 #include "Author.h"
  24 #include "Buffer.h"
  25 #include "buffer_funcs.h"
  26 #include "BufferParams.h"
  27 #include "BufferView.h"
  28 #include "Changes.h"
  29 #include "CompletionList.h"
  30 #include "Cursor.h"
  31 #include "CutAndPaste.h"
  32 #include "DispatchResult.h"
  33 #include "Encoding.h"
  34 #include "ErrorList.h"
  35 #include "FuncRequest.h"
  36 #include "factory.h"
  37 #include "InsetList.h"
  38 #include "Language.h"
  39 #include "Layout.h"
  40 #include "Length.h"
  41 #include "Lexer.h"
  42 #include "lyxfind.h"
  43 #include "LyXRC.h"
  44 #include "Paragraph.h"
  45 #include "ParagraphParameters.h"
  46 #include "ParIterator.h"
  47 #include "TextClass.h"
  48 #include "TextMetrics.h"
  49 #include "WordLangTuple.h"
  50 #include "WordList.h"
  51
  52 #include "insets/InsetText.h"
  53 #include "insets/InsetBibitem.h"
  54 #include "insets/InsetCaption.h"
  55 #include "insets/InsetNewline.h"
  56 #include "insets/InsetNewpage.h"
  57 #include "insets/InsetArgument.h"
  58 #include "insets/InsetIPAMacro.h"
  59 #include "insets/InsetSpace.h"
  60 #include "insets/InsetSpecialChar.h"
  61 #include "insets/InsetTabular.h"
  62
  63 #include "support/convert.h"
  64 #include "support/debug.h"
  65 #include "support/docstream.h"
  66 #include "support/gettext.h"
  67 #include "support/lassert.h"
  68 #include "support/lstrings.h"
  69 #include "support/lyxalgo.h"
  70 #include "support/lyxtime.h"
  71 #include "support/textutils.h"
  72 #include "support/unique_ptr.h"
  73
  74 #include <sstream>
  75
  76
  77 using namespace std;
  78 using namespace lyx::support;
  79
  80 namespace lyx {
  81
  82 using cap::cutSelection;
  83 using cap::pasteParagraphList;
  84
  85 static bool moveItem(Paragraph & fromPar, pos_type fromPos,
  86         Paragraph & toPar, pos_type toPos, BufferParams const & params)
  87 {
  88         // Note: moveItem() does not honour change tracking!
  89         // Therefore, it should only be used for breaking and merging paragraphs
  90
  91         // We need a copy here because the character at fromPos is going to be erased.
  92         Font const tmpFont = fromPar.getFontSettings(params, fromPos);
  93         Change const tmpChange = fromPar.lookupChange(fromPos);
  94
  95         if (Inset * tmpInset = fromPar.getInset(fromPos)) {
  96                 fromPar.releaseInset(fromPos);
  97                 // The inset is not in fromPar any more.
  98                 if (!toPar.insertInset(toPos, tmpInset, tmpFont, tmpChange)) {
  99                         delete tmpInset;
 100                         return false;
 101                 }
 102                 return true;
 103         }
 104
 105         char_type const tmpChar = fromPar.getChar(fromPos);
 106         fromPar.eraseChar(fromPos, false);
 107         toPar.insertChar(toPos, tmpChar, tmpFont, tmpChange);
 108         return true;
 109 }
 110
 111
 112 void breakParagraphConservative(BufferParams const & bparams,
 113         ParagraphList & pars, pit_type pit, pos_type pos)
 114 {
 115         // create a new paragraph
 116         Paragraph & tmp = *pars.insert(lyx::next(pars.begin(), pit + 1),
 117                                        Paragraph());
 118         Paragraph & par = pars[pit];
 119
 120         tmp.setInsetOwner(&par.inInset());
 121         tmp.makeSameLayout(par);
 122
 123         LASSERT(pos <= par.size(), return);
 124
 125         if (pos < par.size()) {
 126                 // move everything behind the break position to the new paragraph
 127                 pos_type pos_end = par.size() - 1;
 128
 129                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 130                         if (moveItem(par, pos, tmp, j, bparams)) {
 131                                 ++j;
 132                         }
 133                 }
 134                 // Move over the end-of-par change information
 135                 tmp.setChange(tmp.size(), par.lookupChange(par.size()));
 136                 par.setChange(par.size(), Change(bparams.track_changes ?
 137                                            Change::INSERTED : Change::UNCHANGED));
 138         }
 139 }
 140
 141
 142 void mergeParagraph(BufferParams const & bparams,
 143         ParagraphList & pars, pit_type par_offset)
 144 {
 145         Paragraph & next = pars[par_offset + 1];
 146         Paragraph & par = pars[par_offset];
 147
 148         pos_type pos_end = next.size() - 1;
 149         pos_type pos_insert = par.size();
 150
 151         // the imaginary end-of-paragraph character (at par.size()) has to be
 152         // marked as unmodified. Otherwise, its change is adopted by the first
 153         // character of the next paragraph.
 154         if (par.isChanged(par.size())) {
 155                 LYXERR(Debug::CHANGES,
 156                    "merging par with inserted/deleted end-of-par character");
 157                 par.setChange(par.size(), Change(Change::UNCHANGED));
 158         }
 159
 160         Change change = next.lookupChange(next.size());
 161
 162         // move the content of the second paragraph to the end of the first one
 163         for (pos_type i = 0, j = pos_insert; i <= pos_end; ++i) {
 164                 if (moveItem(next, 0, par, j, bparams)) {
 165                         ++j;
 166                 }
 167         }
 168
 169         // move the change of the end-of-paragraph character
 170         par.setChange(par.size(), change);
 171
 172         pars.erase(lyx::next(pars.begin(), par_offset + 1));
 173 }
 174
 175
 176 Text::Text(InsetText * owner, bool use_default_layout)
 177         : owner_(owner)
 178 {
 179         pars_.push_back(Paragraph());
 180         Paragraph & par = pars_.back();
 181         par.setInsetOwner(owner);
 182         DocumentClass const & dc = owner->buffer().params().documentClass();
 183         if (use_default_layout)
 184                 par.setDefaultLayout(dc);
 185         else
 186                 par.setPlainLayout(dc);
 187 }
 188
 189
 190 Text::Text(InsetText * owner, Text const & text)
 191         : owner_(owner), pars_(text.pars_)
 192 {
 193         ParagraphList::iterator const end = pars_.end();
 194         ParagraphList::iterator it = pars_.begin();
 195         for (; it != end; ++it)
 196                 it->setInsetOwner(owner);
 197 }
 198
 199
 200 pit_type Text::depthHook(pit_type pit, depth_type depth) const
 201 {
 202         pit_type newpit = pit;
 203
 204         if (newpit != 0)
 205                 --newpit;
 206
 207         while (newpit != 0 && pars_[newpit].getDepth() > depth)
 208                 --newpit;
 209
 210         if (pars_[newpit].getDepth() > depth)
 211                 return pit;
 212
 213         return newpit;
 214 }
 215
 216
 217 pit_type Text::outerHook(pit_type par_offset) const
 218 {
 219         Paragraph const & par = pars_[par_offset];
 220
 221         if (par.getDepth() == 0)
 222                 return pars_.size();
 223         return depthHook(par_offset, depth_type(par.getDepth() - 1));
 224 }
 225
 226
 227 bool Text::isFirstInSequence(pit_type par_offset) const
 228 {
 229         Paragraph const & par = pars_[par_offset];
 230
 231         pit_type dhook_offset = depthHook(par_offset, par.getDepth());
 232
 233         if (dhook_offset == par_offset)
 234                 return true;
 235
 236         Paragraph const & dhook = pars_[dhook_offset];
 237
 238         return dhook.layout() != par.layout()
 239                 || dhook.getDepth() != par.getDepth();
 240 }
 241
 242
 243 int Text::getTocLevel(pit_type par_offset) const
 244 {
 245         Paragraph const & par = pars_[par_offset];
 246
 247         if (par.layout().isEnvironment() && !isFirstInSequence(par_offset))
 248                 return Layout::NOT_IN_TOC;
 249
 250         return par.layout().toclevel;
 251 }
 252
 253
 254 Font const Text::outerFont(pit_type par_offset) const
 255 {
 256         depth_type par_depth = pars_[par_offset].getDepth();
 257         FontInfo tmpfont = inherit_font;
 258         depth_type prev_par_depth = 0;
 259         // Resolve against environment font information
 260         while (par_offset != pit_type(pars_.size())
 261                && par_depth != prev_par_depth
 262                && par_depth
 263                && !tmpfont.resolved()) {
 264                 prev_par_depth = par_depth;
 265                 par_offset = outerHook(par_offset);
 266                 if (par_offset != pit_type(pars_.size())) {
 267                         tmpfont.realize(pars_[par_offset].layout().font);
 268                         par_depth = pars_[par_offset].getDepth();
 269                 }
 270         }
 271
 272         return Font(tmpfont);
 273 }
 274
 275
 276 static void acceptOrRejectChanges(ParagraphList & pars,
 277         BufferParams const & bparams, Text::ChangeOp op)
 278 {
 279         pit_type pars_size = static_cast<pit_type>(pars.size());
 280
 281         // first, accept or reject changes within each individual
 282         // paragraph (do not consider end-of-par)
 283         for (pit_type pit = 0; pit < pars_size; ++pit) {
 284                 // prevent assertion failure
 285                 if (!pars[pit].empty()) {
 286                         if (op == Text::ACCEPT)
 287                                 pars[pit].acceptChanges(0, pars[pit].size());
 288                         else
 289                                 pars[pit].rejectChanges(0, pars[pit].size());
 290                 }
 291         }
 292
 293         // next, accept or reject imaginary end-of-par characters
 294         for (pit_type pit = 0; pit < pars_size; ++pit) {
 295                 pos_type pos = pars[pit].size();
 296                 if (pars[pit].isChanged(pos)) {
 297                         // keep the end-of-par char if it is inserted and accepted
 298                         // or when it is deleted and rejected.
 299                         if (pars[pit].isInserted(pos) == (op == Text::ACCEPT)) {
 300                                 pars[pit].setChange(pos, Change(Change::UNCHANGED));
 301                         } else {
 302                                 if (pit == pars_size - 1) {
 303                                         // we cannot remove a par break at the end of the last
 304                                         // paragraph; instead, we mark it unchanged
 305                                         pars[pit].setChange(pos, Change(Change::UNCHANGED));
 306                                 } else {
 307                                         mergeParagraph(bparams, pars, pit);
 308                                         --pit;
 309                                         --pars_size;
 310                                 }
 311                         }
 312                 }
 313         }
 314 }
 315
 316
 317 void acceptChanges(ParagraphList & pars, BufferParams const & bparams)
 318 {
 319         acceptOrRejectChanges(pars, bparams, Text::ACCEPT);
 320 }
 321
 322
 323 void rejectChanges(ParagraphList & pars, BufferParams const & bparams)
 324 {
 325         acceptOrRejectChanges(pars, bparams, Text::REJECT);
 326 }
 327
 328
 329 InsetText const & Text::inset() const
 330 {
 331         return *owner_;
 332 }
 333
 334
 335
 336 void Text::readParToken(Paragraph & par, Lexer & lex,
 337         string const & token, Font & font, Change & change, ErrorList & errorList)
 338 {
 339         Buffer * buf = const_cast<Buffer *>(&owner_->buffer());
 340         BufferParams & bp = buf->params();
 341
 342         if (token[0] != '\\') {
 343                 docstring dstr = lex.getDocString();
 344                 par.appendString(dstr, font, change);
 345
 346         } else if (token == "\\begin_layout") {
 347                 lex.eatLine();
 348                 docstring layoutname = lex.getDocString();
 349
 350                 font = Font(inherit_font, bp.language);
 351                 change = Change(Change::UNCHANGED);
 352
 353                 DocumentClass const & tclass = bp.documentClass();
 354
 355                 if (layoutname.empty())
 356                         layoutname = tclass.defaultLayoutName();
 357
 358                 if (owner_->forcePlainLayout()) {
 359                         // in this case only the empty layout is allowed
 360                         layoutname = tclass.plainLayoutName();
 361                 } else if (par.usePlainLayout()) {
 362                         // in this case, default layout maps to empty layout
 363                         if (layoutname == tclass.defaultLayoutName())
 364                                 layoutname = tclass.plainLayoutName();
 365                 } else {
 366                         // otherwise, the empty layout maps to the default
 367                         if (layoutname == tclass.plainLayoutName())
 368                                 layoutname = tclass.defaultLayoutName();
 369                 }
 370
 371                 // When we apply an unknown layout to a document, we add this layout to the textclass
 372                 // of this document. For example, when you apply class article to a beamer document,
 373                 // all unknown layouts such as frame will be added to document class article so that
 374                 // these layouts can keep their original names.
 375                 bool const added_one = tclass.addLayoutIfNeeded(layoutname);
 376                 if (added_one) {
 377                         // Warn the user.
 378                         docstring const s = bformat(_("Layout `%1$s' was not found."), layoutname);
 379                         errorList.push_back(
 380                                 ErrorItem(_("Layout Not Found"), s, par.id(), 0, par.size()));
 381                 }
 382
 383                 par.setLayout(bp.documentClass()[layoutname]);
 384
 385                 // Test whether the layout is obsolete.
 386                 Layout const & layout = par.layout();
 387                 if (!layout.obsoleted_by().empty())
 388                         par.setLayout(bp.documentClass()[layout.obsoleted_by()]);
 389
 390                 par.params().read(lex);
 391
 392         } else if (token == "\\end_layout") {
 393                 LYXERR0("Solitary \\end_layout in line " << lex.lineNumber() << "\n"
 394                        << "Missing \\begin_layout ?");
 395         } else if (token == "\\end_inset") {
 396                 LYXERR0("Solitary \\end_inset in line " << lex.lineNumber() << "\n"
 397                        << "Missing \\begin_inset ?");
 398         } else if (token == "\\begin_inset") {
 399                 Inset * inset = readInset(lex, buf);
 400                 if (inset)
 401                         par.insertInset(par.size(), inset, font, change);
 402                 else {
 403                         lex.eatLine();
 404                         docstring line = lex.getDocString();
 405                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 406                                             par.id(), 0, par.size()));
 407                 }
 408         } else if (token == "\\family") {
 409                 lex.next();
 410                 setLyXFamily(lex.getString(), font.fontInfo());
 411         } else if (token == "\\series") {
 412                 lex.next();
 413                 setLyXSeries(lex.getString(), font.fontInfo());
 414         } else if (token == "\\shape") {
 415                 lex.next();
 416                 setLyXShape(lex.getString(), font.fontInfo());
 417         } else if (token == "\\size") {
 418                 lex.next();
 419                 setLyXSize(lex.getString(), font.fontInfo());
 420         } else if (token == "\\lang") {
 421                 lex.next();
 422                 string const tok = lex.getString();
 423                 Language const * lang = languages.getLanguage(tok);
 424                 if (lang) {
 425                         font.setLanguage(lang);
 426                 } else {
 427                         font.setLanguage(bp.language);
 428                         lex.printError("Unknown language `$$Token'");
 429                 }
 430         } else if (token == "\\numeric") {
 431                 lex.next();
 432                 font.fontInfo().setNumber(setLyXMisc(lex.getString()));
 433         } else if (token == "\\emph") {
 434                 lex.next();
 435                 font.fontInfo().setEmph(setLyXMisc(lex.getString()));
 436         } else if (token == "\\bar") {
 437                 lex.next();
 438                 string const tok = lex.getString();
 439
 440                 if (tok == "under")
 441                         font.fontInfo().setUnderbar(FONT_ON);
 442                 else if (tok == "no")
 443                         font.fontInfo().setUnderbar(FONT_OFF);
 444                 else if (tok == "default")
 445                         font.fontInfo().setUnderbar(FONT_INHERIT);
 446                 else
 447                         lex.printError("Unknown bar font flag "
 448                                        "`$$Token'");
 449         } else if (token == "\\strikeout") {
 450                 lex.next();
 451                 font.fontInfo().setStrikeout(setLyXMisc(lex.getString()));
 452         } else if (token == "\\uuline") {
 453                 lex.next();
 454                 font.fontInfo().setUuline(setLyXMisc(lex.getString()));
 455         } else if (token == "\\uwave") {
 456                 lex.next();
 457                 font.fontInfo().setUwave(setLyXMisc(lex.getString()));
 458         } else if (token == "\\noun") {
 459                 lex.next();
 460                 font.fontInfo().setNoun(setLyXMisc(lex.getString()));
 461         } else if (token == "\\color") {
 462                 lex.next();
 463                 setLyXColor(lex.getString(), font.fontInfo());
 464         } else if (token == "\\SpecialChar" ||
 465                    (token == "\\SpecialCharNoPassThru" &&
 466                     !par.layout().pass_thru && !inset().isPassThru())) {
 467                 auto inset = make_unique<InsetSpecialChar>();
 468                 inset->read(lex);
 469                 inset->setBuffer(*buf);
 470                 par.insertInset(par.size(), inset.release(), font, change);
 471         } else if (token == "\\SpecialCharNoPassThru") {
 472                 lex.next();
 473                 docstring const s = ltrim(lex.getDocString(), "\\");
 474                 par.insert(par.size(), s, font, change);
 475         } else if (token == "\\IPAChar") {
 476                 auto inset = make_unique<InsetIPAChar>();
 477                 inset->read(lex);
 478                 inset->setBuffer(*buf);
 479                 par.insertInset(par.size(), inset.release(), font, change);
 480         } else if (token == "\\twohyphens" || token == "\\threehyphens") {
 481                 // Ideally, this should be done by lyx2lyx, but lyx2lyx does not know the
 482                 // running font and does not know anything about layouts (and CopyStyle).
 483                 Layout const & layout(par.layout());
 484                 FontInfo info = font.fontInfo();
 485                 info.realize(layout.resfont);
 486                 if (layout.pass_thru || inset().isPassThru() ||
 487                     info.family() == TYPEWRITER_FAMILY) {
 488                         if (token == "\\twohyphens")
 489                                 par.insert(par.size(), from_ascii("--"), font, change);
 490                         else
 491                                 par.insert(par.size(), from_ascii("---"), font, change);
 492                 } else {
 493                         if (token == "\\twohyphens")
 494                                 par.insertChar(par.size(), 0x2013, font, change);
 495                         else
 496                                 par.insertChar(par.size(), 0x2014, font, change);
 497                 }
 498         } else if (token == "\\backslash") {
 499                 par.appendChar('\\', font, change);
 500         } else if (token == "\\LyXTable") {
 501                 auto inset = make_unique<InsetTabular>(buf);
 502                 inset->read(lex);
 503                 par.insertInset(par.size(), inset.release(), font, change);
 504         } else if (token == "\\change_unchanged") {
 505                 change = Change(Change::UNCHANGED);
 506         } else if (token == "\\change_inserted" || token == "\\change_deleted") {
 507                 lex.eatLine();
 508                 istringstream is(lex.getString());
 509                 int aid;
 510                 time_t ct;
 511                 is >> aid >> ct;
 512                 BufferParams::AuthorMap const & am = bp.author_map_;
 513                 if (am.find(aid) == am.end()) {
 514                         errorList.push_back(ErrorItem(
 515                                 _("Change tracking author index missing"),
 516                                 bformat(_("A change tracking author information for index "
 517                                           "%1$d is missing. This can happen after a wrong "
 518                                           "merge by a version control system. In this case, "
 519                                           "either fix the merge, or have this information "
 520                                           "missing until the corresponding tracked changes "
 521                                           "are merged or this user edits the file again.\n"),
 522                                         aid),
 523                                 par.id(), par.size(), par.size() + 1
 524                                 ));
 525                         bp.addAuthor(Author(aid));
 526                 }
 527                 if (token == "\\change_inserted")
 528                         change = Change(Change::INSERTED, am.find(aid)->second, ct);
 529                 else
 530                         change = Change(Change::DELETED, am.find(aid)->second, ct);
 531         } else {
 532                 lex.eatLine();
 533                 errorList.push_back(ErrorItem(_("Unknown token"),
 534                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 535                         lex.getDocString()),
 536                         par.id(), 0, par.size()));
 537         }
 538 }
 539
 540
 541 void Text::readParagraph(Paragraph & par, Lexer & lex,
 542         ErrorList & errorList)
 543 {
 544         lex.nextToken();
 545         string token = lex.getString();
 546         Font font;
 547         Change change(Change::UNCHANGED);
 548
 549         while (lex.isOK()) {
 550                 readParToken(par, lex, token, font, change, errorList);
 551
 552                 lex.nextToken();
 553                 token = lex.getString();
 554
 555                 if (token.empty())
 556                         continue;
 557
 558                 if (token == "\\end_layout") {
 559                         //Ok, paragraph finished
 560                         break;
 561                 }
 562
 563                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 564                 if (token == "\\begin_layout" || token == "\\end_document"
 565                     || token == "\\end_inset" || token == "\\begin_deeper"
 566                     || token == "\\end_deeper") {
 567                         lex.pushToken(token);
 568                         lyxerr << "Paragraph ended in line "
 569                                << lex.lineNumber() << "\n"
 570                                << "Missing \\end_layout.\n";
 571                         break;
 572                 }
 573         }
 574         // Final change goes to paragraph break:
 575         par.setChange(par.size(), change);
 576
 577         // Initialize begin_of_body_ on load; redoParagraph maintains
 578         par.setBeginOfBody();
 579
 580         // mark paragraph for spell checking on load
 581         // par.requestSpellCheck();
 582 }
 583
 584
 585 class TextCompletionList : public CompletionList
 586 {
 587 public:
 588         ///
 589         TextCompletionList(Cursor const & cur, WordList const * list)
 590                 : buffer_(cur.buffer()), list_(list)
 591         {}
 592         ///
 593         virtual ~TextCompletionList() {}
 594
 595         ///
 596         virtual bool sorted() const { return true; }
 597         ///
 598         virtual size_t size() const
 599         {
 600                 return list_->size();
 601         }
 602         ///
 603         virtual docstring const & data(size_t idx) const
 604         {
 605                 return list_->word(idx);
 606         }
 607
 608 private:
 609         ///
 610         Buffer const * buffer_;
 611         ///
 612         WordList const * list_;
 613 };
 614
 615
 616 bool Text::empty() const
 617 {
 618         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 619                 // FIXME: Should we consider the labeled type as empty too?
 620                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 621 }
 622
 623
 624 double Text::spacing(Paragraph const & par) const
 625 {
 626         if (par.params().spacing().isDefault())
 627                 return owner_->buffer().params().spacing().getValue();
 628         return par.params().spacing().getValue();
 629 }
 630
 631
 632 /**
 633  * This breaks a paragraph at the specified position.
 634  * The new paragraph will:
 635  * - Decrease depth by one (or change layout to default layout) when
 636  *    keep_layout == false
 637  * - keep current depth and layout when keep_layout == true
 638  */
 639 static void breakParagraph(Text & text, pit_type par_offset, pos_type pos,
 640                     bool keep_layout)
 641 {
 642         BufferParams const & bparams = text.inset().buffer().params();
 643         ParagraphList & pars = text.paragraphs();
 644         // create a new paragraph, and insert into the list
 645         ParagraphList::iterator tmp =
 646                 pars.insert(lyx::next(pars.begin(), par_offset + 1),
 647                             Paragraph());
 648
 649         Paragraph & par = pars[par_offset];
 650
 651         // remember to set the inset_owner
 652         tmp->setInsetOwner(&par.inInset());
 653         // without doing that we get a crash when typing <Return> at the
 654         // end of a paragraph
 655         tmp->setPlainOrDefaultLayout(bparams.documentClass());
 656
 657         if (keep_layout) {
 658                 tmp->setLayout(par.layout());
 659                 tmp->setLabelWidthString(par.params().labelWidthString());
 660                 tmp->params().depth(par.params().depth());
 661         } else if (par.params().depth() > 0) {
 662                 Paragraph const & hook = pars[text.outerHook(par_offset)];
 663                 tmp->setLayout(hook.layout());
 664                 // not sure the line below is useful
 665                 tmp->setLabelWidthString(par.params().labelWidthString());
 666                 tmp->params().depth(hook.params().depth());
 667         }
 668
 669         bool const isempty = (par.allowEmpty() && par.empty());
 670
 671         if (!isempty && (par.size() > pos || par.empty())) {
 672                 tmp->setLayout(par.layout());
 673                 tmp->params().align(par.params().align());
 674                 tmp->setLabelWidthString(par.params().labelWidthString());
 675
 676                 tmp->params().depth(par.params().depth());
 677                 tmp->params().noindent(par.params().noindent());
 678
 679                 // move everything behind the break position
 680                 // to the new paragraph
 681
 682                 /* Note: if !keepempty, empty() == true, then we reach
 683                  * here with size() == 0. So pos_end becomes - 1. This
 684                  * doesn't cause problems because both loops below
 685                  * enforce pos <= pos_end and 0 <= pos
 686                  */
 687                 pos_type pos_end = par.size() - 1;
 688
 689                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 690                         if (moveItem(par, pos, *tmp, j, bparams)) {
 691                                 ++j;
 692                         }
 693                 }
 694         }
 695
 696         // Move over the end-of-par change information
 697         tmp->setChange(tmp->size(), par.lookupChange(par.size()));
 698         par.setChange(par.size(), Change(bparams.track_changes ?
 699                                            Change::INSERTED : Change::UNCHANGED));
 700
 701         if (pos) {
 702                 // Make sure that we keep the language when
 703                 // breaking paragraph.
 704                 if (tmp->empty()) {
 705                         Font changed = tmp->getFirstFontSettings(bparams);
 706                         Font const & old = par.getFontSettings(bparams, par.size());
 707                         changed.setLanguage(old.language());
 708                         tmp->setFont(0, changed);
 709                 }
 710
 711                 return;
 712         }
 713
 714         if (!isempty) {
 715                 bool const soa = par.params().startOfAppendix();
 716                 par.params().clear();
 717                 // do not lose start of appendix marker (bug 4212)
 718                 par.params().startOfAppendix(soa);
 719                 par.setPlainOrDefaultLayout(bparams.documentClass());
 720         }
 721
 722         if (keep_layout) {
 723                 par.setLayout(tmp->layout());
 724                 par.setLabelWidthString(tmp->params().labelWidthString());
 725                 par.params().depth(tmp->params().depth());
 726         }
 727 }
 728
 729
 730 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 731 {
 732         LBUFERR(this == cur.text());
 733
 734         Paragraph & cpar = cur.paragraph();
 735         pit_type cpit = cur.pit();
 736
 737         DocumentClass const & tclass = cur.buffer()->params().documentClass();
 738         Layout const & layout = cpar.layout();
 739
 740         if (cur.lastpos() == 0 && !cpar.allowEmpty()) {
 741                 if (changeDepthAllowed(cur, DEC_DEPTH))
 742                         changeDepth(cur, DEC_DEPTH);
 743                 else {
 744                         docstring const & lay = cur.paragraph().usePlainLayout()
 745                             ? tclass.plainLayoutName() : tclass.defaultLayoutName();
 746                         if (lay != layout.name())
 747                                 setLayout(cur, lay);
 748                 }
 749                 return;
 750         }
 751
 752         cur.recordUndo();
 753
 754         // Always break behind a space
 755         // It is better to erase the space (Dekel)
 756         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 757                 cpar.eraseChar(cur.pos(), cur.buffer()->params().track_changes);
 758
 759         // What should the layout for the new paragraph be?
 760         bool keep_layout = layout.isEnvironment()
 761                 || (layout.isParagraph() && layout.parbreak_is_newline);
 762         if (inverse_logic)
 763                 keep_layout = !keep_layout;
 764
 765         // We need to remember this before we break the paragraph, because
 766         // that invalidates the layout variable
 767         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 768
 769         // we need to set this before we insert the paragraph.
 770         bool const isempty = cpar.allowEmpty() && cpar.empty();
 771
 772         lyx::breakParagraph(*this, cpit, cur.pos(), keep_layout);
 773
 774         // After this, neither paragraph contains any rows!
 775
 776         cpit = cur.pit();
 777         pit_type next_par = cpit + 1;
 778
 779         // well this is the caption hack since one caption is really enough
 780         if (sensitive) {
 781                 if (cur.pos() == 0)
 782                         // set to standard-layout
 783                 //FIXME Check if this should be plainLayout() in some cases
 784                         pars_[cpit].applyLayout(tclass.defaultLayout());
 785                 else
 786                         // set to standard-layout
 787                         //FIXME Check if this should be plainLayout() in some cases
 788                         pars_[next_par].applyLayout(tclass.defaultLayout());
 789         }
 790
 791         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 792                 if (!pars_[next_par].eraseChar(0, cur.buffer()->params().track_changes))
 793                         break; // the character couldn't be deleted physically due to change tracking
 794         }
 795
 796         // A singlePar update is not enough in this case.
 797         cur.screenUpdateFlags(Update::Force);
 798         cur.forceBufferUpdate();
 799
 800         // This check is necessary. Otherwise the new empty paragraph will
 801         // be deleted automatically. And it is more friendly for the user!
 802         if (cur.pos() != 0 || isempty)
 803                 setCursor(cur, cur.pit() + 1, 0);
 804         else
 805                 setCursor(cur, cur.pit(), 0);
 806 }
 807
 808
 809 // needed to insert the selection
 810 void Text::insertStringAsLines(Cursor & cur, docstring const & str,
 811                 Font const & font)
 812 {
 813         BufferParams const & bparams = owner_->buffer().params();
 814         pit_type pit = cur.pit();
 815         pos_type pos = cur.pos();
 816
 817         // insert the string, don't insert doublespace
 818         bool space_inserted = true;
 819         for (docstring::const_iterator cit = str.begin();
 820             cit != str.end(); ++cit) {
 821                 Paragraph & par = pars_[pit];
 822                 if (*cit == '\n') {
 823                         if (inset().allowMultiPar() && (!par.empty() || par.allowEmpty())) {
 824                                 lyx::breakParagraph(*this, pit, pos,
 825                                         par.layout().isEnvironment());
 826                                 ++pit;
 827                                 pos = 0;
 828                                 space_inserted = true;
 829                         } else {
 830                                 continue;
 831                         }
 832                 // do not insert consecutive spaces if !free_spacing
 833                 } else if ((*cit == ' ' || *cit == '\t') &&
 834                            space_inserted && !par.isFreeSpacing()) {
 835                         continue;
 836                 } else if (*cit == '\t') {
 837                         if (!par.isFreeSpacing()) {
 838                                 // tabs are like spaces here
 839                                 par.insertChar(pos, ' ', font, bparams.track_changes);
 840                                 ++pos;
 841                                 space_inserted = true;
 842                         } else {
 843                                 par.insertChar(pos, *cit, font, bparams.track_changes);
 844                                 ++pos;
 845                                 space_inserted = true;
 846                         }
 847                 } else if (!isPrintable(*cit)) {
 848                         // Ignore unprintables
 849                         continue;
 850                 } else {
 851                         // just insert the character
 852                         par.insertChar(pos, *cit, font, bparams.track_changes);
 853                         ++pos;
 854                         space_inserted = (*cit == ' ');
 855                 }
 856         }
 857         setCursor(cur, pit, pos);
 858 }
 859
 860
 861 // turn double CR to single CR, others are converted into one
 862 // blank. Then insertStringAsLines is called
 863 void Text::insertStringAsParagraphs(Cursor & cur, docstring const & str,
 864                 Font const & font)
 865 {
 866         docstring linestr = str;
 867         bool newline_inserted = false;
 868
 869         for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 870                 if (linestr[i] == '\n') {
 871                         if (newline_inserted) {
 872                                 // we know that \r will be ignored by
 873                                 // insertStringAsLines. Of course, it is a dirty
 874                                 // trick, but it works...
 875                                 linestr[i - 1] = '\r';
 876                                 linestr[i] = '\n';
 877                         } else {
 878                                 linestr[i] = ' ';
 879                                 newline_inserted = true;
 880                         }
 881                 } else if (isPrintable(linestr[i])) {
 882                         newline_inserted = false;
 883                 }
 884         }
 885         insertStringAsLines(cur, linestr, font);
 886 }
 887
 888
 889 // insert a character, moves all the following breaks in the
 890 // same Paragraph one to the right and make a rebreak
 891 void Text::insertChar(Cursor & cur, char_type c)
 892 {
 893         LBUFERR(this == cur.text());
 894
 895         cur.recordUndo(INSERT_UNDO);
 896
 897         TextMetrics const & tm = cur.bv().textMetrics(this);
 898         Buffer const & buffer = *cur.buffer();
 899         Paragraph & par = cur.paragraph();
 900         // try to remove this
 901         pit_type const pit = cur.pit();
 902
 903         bool const freeSpacing = par.layout().free_spacing ||
 904                 par.isFreeSpacing();
 905
 906         if (lyxrc.auto_number) {
 907                 static docstring const number_operators = from_ascii("+-/*");
 908                 static docstring const number_unary_operators = from_ascii("+-");
 909                 static docstring const number_separators = from_ascii(".,:");
 910
 911                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 912                         if (!isDigitASCII(c) && !contains(number_operators, c) &&
 913                             !(contains(number_separators, c) &&
 914                               cur.pos() != 0 &&
 915                               cur.pos() != cur.lastpos() &&
 916                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 917                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 918                            )
 919                                 number(cur); // Set current_font.number to OFF
 920                 } else if (isDigitASCII(c) &&
 921                            cur.real_current_font.isVisibleRightToLeft()) {
 922                         number(cur); // Set current_font.number to ON
 923
 924                         if (cur.pos() != 0) {
 925                                 char_type const c = par.getChar(cur.pos() - 1);
 926                                 if (contains(number_unary_operators, c) &&
 927                                     (cur.pos() == 1
 928                                      || par.isSeparator(cur.pos() - 2)
 929                                      || par.isEnvSeparator(cur.pos() - 2)
 930                                      || par.isNewline(cur.pos() - 2))
 931                                   ) {
 932                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 933                                                 tm.font_);
 934                                 } else if (contains(number_separators, c)
 935                                      && cur.pos() >= 2
 936                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 937                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 938                                                 tm.font_);
 939                                 }
 940                         }
 941                 }
 942         }
 943
 944         // In Bidi text, we want spaces to be treated in a special way: spaces
 945         // which are between words in different languages should get the
 946         // paragraph's language; otherwise, spaces should keep the language
 947         // they were originally typed in. This is only in effect while typing;
 948         // after the text is already typed in, the user can always go back and
 949         // explicitly set the language of a space as desired. But 99.9% of the
 950         // time, what we're doing here is what the user actually meant.
 951         //
 952         // The following cases are the ones in which the language of the space
 953         // should be changed to match that of the containing paragraph. In the
 954         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 955         // represents a space, pipe (|) represents the cursor position (so the
 956         // character before it is the one just typed in). The different cases
 957         // are depicted logically (not visually), from left to right:
 958         //
 959         // 1. A_a|
 960         // 2. a_A|
 961         //
 962         // Theoretically, there are other situations that we should, perhaps, deal
 963         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 964         // point (to understand why, just try to create this situation...).
 965
 966         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 967                 // get font in front and behind the space in question. But do NOT
 968                 // use getFont(cur.pos()) because the character c is not inserted yet
 969                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 970                 Font const & post_space_font = cur.real_current_font;
 971                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 972                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 973
 974                 if (pre_space_rtl != post_space_rtl) {
 975                         // Set the space's language to match the language of the
 976                         // adjacent character whose direction is the paragraph's
 977                         // direction; don't touch other properties of the font
 978                         Language const * lang =
 979                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 980                                 pre_space_font.language() : post_space_font.language();
 981
 982                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
 983                         space_font.setLanguage(lang);
 984                         par.setFont(cur.pos() - 1, space_font);
 985                 }
 986         }
 987
 988         // Next check, if there will be two blanks together or a blank at
 989         // the beginning of a paragraph.
 990         // I decided to handle blanks like normal characters, the main
 991         // difference are the special checks when calculating the row.fill
 992         // (blank does not count at the end of a row) and the check here
 993
 994         // When the free-spacing option is set for the current layout,
 995         // disable the double-space checking
 996         if (!freeSpacing && isLineSeparatorChar(c)) {
 997                 if (cur.pos() == 0) {
 998                         cur.message(_(
 999                                         "You cannot insert a space at the "
1000                                         "beginning of a paragraph. Please read the Tutorial."));
1001                         return;
1002                 }
1003                 // LASSERT: Is it safe to continue here?
1004                 LASSERT(cur.pos() > 0, /**/);
1005                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
1006                                 && !par.isDeleted(cur.pos() - 1)) {
1007                         cur.message(_(
1008                                         "You cannot type two spaces this way. "
1009                                         "Please read the Tutorial."));
1010                         return;
1011                 }
1012         }
1013
1014         // Prevent to insert uncodable characters in verbatim and ERT
1015         // (workaround for bug 9012)
1016         // Don't do it for listings inset, since InsetListings::latex() tries
1017         // to switch to a usable encoding which works in many cases (bug 9102).
1018         if (cur.paragraph().isPassThru() && owner_->lyxCode() != LISTINGS_CODE &&
1019             cur.current_font.language()) {
1020                 Encoding const * e = cur.current_font.language()->encoding();
1021                 if (!e->encodable(c)) {
1022                         cur.message(_("Character is uncodable in verbatim paragraphs."));
1023                         return;
1024                 }
1025         }
1026
1027         pos_type pos = cur.pos();
1028         if (!cur.paragraph().isPassThru() && owner_->lyxCode() != IPA_CODE &&
1029             cur.real_current_font.fontInfo().family() != TYPEWRITER_FAMILY &&
1030             c == '-' && pos > 0) {
1031                 if (par.getChar(pos - 1) == '-') {
1032                         // convert "--" to endash
1033                         par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
1034                         c = 0x2013;
1035                         pos--;
1036                 } else if (par.getChar(pos - 1) == 0x2013) {
1037                         // convert "---" to emdash
1038                         par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
1039                         c = 0x2014;
1040                         pos--;
1041                 } else if (par.getChar(pos - 1) == 0x2014) {
1042                         // convert "----" to "-"
1043                         par.eraseChar(pos - 1, cur.buffer()->params().track_changes);
1044                         c = '-';
1045                         pos--;
1046                 }
1047         }
1048
1049         par.insertChar(pos, c, cur.current_font,
1050                 cur.buffer()->params().track_changes);
1051         cur.checkBufferStructure();
1052
1053 //              cur.screenUpdateFlags(Update::Force);
1054         bool boundary = cur.boundary()
1055                 || tm.isRTLBoundary(cur.pit(), pos + 1);
1056         setCursor(cur, cur.pit(), pos + 1, false, boundary);
1057         charInserted(cur);
1058 }
1059
1060
1061 void Text::charInserted(Cursor & cur)
1062 {
1063         Paragraph & par = cur.paragraph();
1064
1065         // register word if a non-letter was entered
1066         if (cur.pos() > 1
1067             && !par.isWordSeparator(cur.pos() - 2)
1068             && par.isWordSeparator(cur.pos() - 1)) {
1069                 // get the word in front of cursor
1070                 LBUFERR(this == cur.text());
1071                 cur.paragraph().updateWords();
1072         }
1073 }
1074
1075
1076 // the cursor set functions have a special mechanism. When they
1077 // realize, that you left an empty paragraph, they will delete it.
1078
1079 bool Text::cursorForwardOneWord(Cursor & cur)
1080 {
1081         LBUFERR(this == cur.text());
1082
1083         pos_type const lastpos = cur.lastpos();
1084         pit_type pit = cur.pit();
1085         pos_type pos = cur.pos();
1086         Paragraph const & par = cur.paragraph();
1087
1088         // Paragraph boundary is a word boundary
1089         if (pos == lastpos || (pos + 1 == lastpos && par.isEnvSeparator(pos))) {
1090                 if (pit != cur.lastpit())
1091                         return setCursor(cur, pit + 1, 0);
1092                 else
1093                         return false;
1094         }
1095
1096         if (lyxrc.mac_like_cursor_movement) {
1097                 // Skip through trailing punctuation and spaces.
1098                 while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
1099                         ++pos;
1100
1101                 // Skip over either a non-char inset or a full word
1102                 if (pos != lastpos && par.isWordSeparator(pos))
1103                         ++pos;
1104                 else while (pos != lastpos && !par.isWordSeparator(pos))
1105                              ++pos;
1106         } else {
1107                 LASSERT(pos < lastpos, return false); // see above
1108                 if (!par.isWordSeparator(pos))
1109                         while (pos != lastpos && !par.isWordSeparator(pos))
1110                                 ++pos;
1111                 else if (par.isChar(pos))
1112                         while (pos != lastpos && par.isChar(pos))
1113                                 ++pos;
1114                 else if (!par.isSpace(pos)) // non-char inset
1115                         ++pos;
1116
1117                 // Skip over white space
1118                 while (pos != lastpos && par.isSpace(pos))
1119                              ++pos;
1120         }
1121
1122         // Don't skip a separator inset at the end of a paragraph
1123         if (pos == lastpos && pos && par.isEnvSeparator(pos - 1))
1124                 --pos;
1125
1126         return setCursor(cur, pit, pos);
1127 }
1128
1129
1130 bool Text::cursorBackwardOneWord(Cursor & cur)
1131 {
1132         LBUFERR(this == cur.text());
1133
1134         pit_type pit = cur.pit();
1135         pos_type pos = cur.pos();
1136         Paragraph & par = cur.paragraph();
1137
1138         // Paragraph boundary is a word boundary
1139         if (pos == 0 && pit != 0) {
1140                 Paragraph & prevpar = getPar(pit - 1);
1141                 pos = prevpar.size();
1142                 // Don't stop after an environment separator
1143                 if (pos && prevpar.isEnvSeparator(pos - 1))
1144                         --pos;
1145                 return setCursor(cur, pit - 1, pos);
1146         }
1147
1148         if (lyxrc.mac_like_cursor_movement) {
1149                 // Skip through punctuation and spaces.
1150                 while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
1151                         --pos;
1152
1153                 // Skip over either a non-char inset or a full word
1154                 if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
1155                         --pos;
1156                 else while (pos != 0 && !par.isWordSeparator(pos - 1))
1157                              --pos;
1158         } else {
1159                 // Skip over white space
1160                 while (pos != 0 && par.isSpace(pos - 1))
1161                              --pos;
1162
1163                 if (pos != 0 && !par.isWordSeparator(pos - 1))
1164                         while (pos != 0 && !par.isWordSeparator(pos - 1))
1165                                 --pos;
1166                 else if (pos != 0 && par.isChar(pos - 1))
1167                         while (pos != 0 && par.isChar(pos - 1))
1168                                 --pos;
1169                 else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
1170                         --pos;
1171         }
1172
1173         return setCursor(cur, pit, pos);
1174 }
1175
1176
1177 bool Text::cursorVisLeftOneWord(Cursor & cur)
1178 {
1179         LBUFERR(this == cur.text());
1180
1181         pos_type left_pos, right_pos;
1182
1183         Cursor temp_cur = cur;
1184
1185         // always try to move at least once...
1186         while (temp_cur.posVisLeft(true /* skip_inset */)) {
1187
1188                 // collect some information about current cursor position
1189                 temp_cur.getSurroundingPos(left_pos, right_pos);
1190                 bool left_is_letter =
1191                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1192                 bool right_is_letter =
1193                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1194
1195                 // if we're not at a letter/non-letter boundary, continue moving
1196                 if (left_is_letter == right_is_letter)
1197                         continue;
1198
1199                 // we should stop when we have an LTR word on our right or an RTL word
1200                 // on our left
1201                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1202                                 temp_cur.buffer()->params(), left_pos).isRightToLeft())
1203                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1204                                 temp_cur.buffer()->params(), right_pos).isRightToLeft()))
1205                         break;
1206         }
1207
1208         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1209                                          true, temp_cur.boundary());
1210 }
1211
1212
1213 bool Text::cursorVisRightOneWord(Cursor & cur)
1214 {
1215         LBUFERR(this == cur.text());
1216
1217         pos_type left_pos, right_pos;
1218
1219         Cursor temp_cur = cur;
1220
1221         // always try to move at least once...
1222         while (temp_cur.posVisRight(true /* skip_inset */)) {
1223
1224                 // collect some information about current cursor position
1225                 temp_cur.getSurroundingPos(left_pos, right_pos);
1226                 bool left_is_letter =
1227                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1228                 bool right_is_letter =
1229                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1230
1231                 // if we're not at a letter/non-letter boundary, continue moving
1232                 if (left_is_letter == right_is_letter)
1233                         continue;
1234
1235                 // we should stop when we have an LTR word on our right or an RTL word
1236                 // on our left
1237                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1238                                 temp_cur.buffer()->params(),
1239                                 left_pos).isRightToLeft())
1240                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1241                                 temp_cur.buffer()->params(),
1242                                 right_pos).isRightToLeft()))
1243                         break;
1244         }
1245
1246         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1247                                          true, temp_cur.boundary());
1248 }
1249
1250
1251 void Text::selectWord(Cursor & cur, word_location loc)
1252 {
1253         LBUFERR(this == cur.text());
1254         CursorSlice from = cur.top();
1255         CursorSlice to;
1256         getWord(from, to, loc);
1257         if (cur.top() != from)
1258                 setCursor(cur, from.pit(), from.pos());
1259         if (to == from)
1260                 return;
1261         if (!cur.selection())
1262                 cur.resetAnchor();
1263         setCursor(cur, to.pit(), to.pos());
1264         cur.setSelection();
1265         cur.setWordSelection(true);
1266 }
1267
1268
1269 void Text::selectAll(Cursor & cur)
1270 {
1271         LBUFERR(this == cur.text());
1272         if (cur.lastpos() == 0 && cur.lastpit() == 0)
1273                 return;
1274         // If the cursor is at the beginning, make sure the cursor ends there
1275         if (cur.pit() == 0 && cur.pos() == 0) {
1276                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1277                 cur.resetAnchor();
1278                 setCursor(cur, 0, 0);
1279         } else {
1280                 setCursor(cur, 0, 0);
1281                 cur.resetAnchor();
1282                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1283         }
1284         cur.setSelection();
1285 }
1286
1287
1288 // Select the word currently under the cursor when no
1289 // selection is currently set
1290 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
1291 {
1292         LBUFERR(this == cur.text());
1293         if (cur.selection())
1294                 return false;
1295         selectWord(cur, loc);
1296         return cur.selection();
1297 }
1298
1299
1300 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
1301 {
1302         LBUFERR(this == cur.text());
1303
1304         if (!cur.selection()) {
1305                 if (!selectChange(cur))
1306                         return;
1307         }
1308
1309         cur.recordUndoSelection();
1310
1311         pit_type begPit = cur.selectionBegin().pit();
1312         pit_type endPit = cur.selectionEnd().pit();
1313
1314         pos_type begPos = cur.selectionBegin().pos();
1315         pos_type endPos = cur.selectionEnd().pos();
1316
1317         // keep selection info, because endPos becomes invalid after the first loop
1318         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
1319
1320         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
1321         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1322                 pos_type parSize = pars_[pit].size();
1323
1324                 // ignore empty paragraphs; otherwise, an assertion will fail for
1325                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
1326                 if (parSize == 0)
1327                         continue;
1328
1329                 // do not consider first paragraph if the cursor starts at pos size()
1330                 if (pit == begPit && begPos == parSize)
1331                         continue;
1332
1333                 // do not consider last paragraph if the cursor ends at pos 0
1334                 if (pit == endPit && endPos == 0)
1335                         break; // last iteration anyway
1336
1337                 pos_type left  = (pit == begPit ? begPos : 0);
1338                 pos_type right = (pit == endPit ? endPos : parSize);
1339
1340                 if (left == right)
1341                         // there is no change here
1342                         continue;
1343
1344                 if (op == ACCEPT) {
1345                         pars_[pit].acceptChanges(left, right);
1346                 } else {
1347                         pars_[pit].rejectChanges(left, right);
1348                 }
1349         }
1350
1351         // next, accept/reject imaginary end-of-par characters
1352
1353         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1354                 pos_type pos = pars_[pit].size();
1355
1356                 // skip if the selection ends before the end-of-par
1357                 if (pit == endPit && endsBeforeEndOfPar)
1358                         break; // last iteration anyway
1359
1360                 // skip if this is not the last paragraph of the document
1361                 // note: the user should be able to accept/reject the par break of the last par!
1362                 if (pit == endPit && pit + 1 != int(pars_.size()))
1363                         break; // last iteration anway
1364
1365                 if (op == ACCEPT) {
1366                         if (pars_[pit].isInserted(pos)) {
1367                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1368                         } else if (pars_[pit].isDeleted(pos)) {
1369                                 if (pit + 1 == int(pars_.size())) {
1370                                         // we cannot remove a par break at the end of the last paragraph;
1371                                         // instead, we mark it unchanged
1372                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1373                                 } else {
1374                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1375                                         --endPit;
1376                                         --pit;
1377                                 }
1378                         }
1379                 } else {
1380                         if (pars_[pit].isDeleted(pos)) {
1381                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1382                         } else if (pars_[pit].isInserted(pos)) {
1383                                 if (pit + 1 == int(pars_.size())) {
1384                                         // we mark the par break at the end of the last paragraph unchanged
1385                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1386                                 } else {
1387                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1388                                         --endPit;
1389                                         --pit;
1390                                 }
1391                         }
1392                 }
1393         }
1394
1395         // finally, invoke the DEPM
1396         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().track_changes);
1397
1398         cur.finishUndo();
1399         cur.clearSelection();
1400         setCursorIntern(cur, begPit, begPos);
1401         cur.screenUpdateFlags(Update::Force);
1402         cur.forceBufferUpdate();
1403 }
1404
1405
1406 void Text::acceptChanges()
1407 {
1408         BufferParams const & bparams = owner_->buffer().params();
1409         lyx::acceptChanges(pars_, bparams);
1410         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.track_changes);
1411 }
1412
1413
1414 void Text::rejectChanges()
1415 {
1416         BufferParams const & bparams = owner_->buffer().params();
1417         pit_type pars_size = static_cast<pit_type>(pars_.size());
1418
1419         // first, reject changes within each individual paragraph
1420         // (do not consider end-of-par)
1421         for (pit_type pit = 0; pit < pars_size; ++pit) {
1422                 if (!pars_[pit].empty())   // prevent assertion failure
1423                         pars_[pit].rejectChanges(0, pars_[pit].size());
1424         }
1425
1426         // next, reject imaginary end-of-par characters
1427         for (pit_type pit = 0; pit < pars_size; ++pit) {
1428                 pos_type pos = pars_[pit].size();
1429
1430                 if (pars_[pit].isDeleted(pos)) {
1431                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1432                 } else if (pars_[pit].isInserted(pos)) {
1433                         if (pit == pars_size - 1) {
1434                                 // we mark the par break at the end of the last
1435                                 // paragraph unchanged
1436                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1437                         } else {
1438                                 mergeParagraph(bparams, pars_, pit);
1439                                 --pit;
1440                                 --pars_size;
1441                         }
1442                 }
1443         }
1444
1445         // finally, invoke the DEPM
1446         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.track_changes);
1447 }
1448
1449
1450 void Text::deleteWordForward(Cursor & cur)
1451 {
1452         LBUFERR(this == cur.text());
1453         if (cur.lastpos() == 0)
1454                 cursorForward(cur);
1455         else {
1456                 cur.resetAnchor();
1457                 cur.selection(true);
1458                 cursorForwardOneWord(cur);
1459                 cur.setSelection();
1460                 cutSelection(cur, true, false);
1461                 cur.checkBufferStructure();
1462         }
1463 }
1464
1465
1466 void Text::deleteWordBackward(Cursor & cur)
1467 {
1468         LBUFERR(this == cur.text());
1469         if (cur.lastpos() == 0)
1470                 cursorBackward(cur);
1471         else {
1472                 cur.resetAnchor();
1473                 cur.selection(true);
1474                 cursorBackwardOneWord(cur);
1475                 cur.setSelection();
1476                 cutSelection(cur, true, false);
1477                 cur.checkBufferStructure();
1478         }
1479 }
1480
1481
1482 // Kill to end of line.
1483 void Text::changeCase(Cursor & cur, TextCase action, bool partial)
1484 {
1485         LBUFERR(this == cur.text());
1486         CursorSlice from;
1487         CursorSlice to;
1488
1489         bool const gotsel = cur.selection();
1490         if (gotsel) {
1491                 from = cur.selBegin();
1492                 to = cur.selEnd();
1493         } else {
1494                 from = cur.top();
1495                 getWord(from, to, partial ? PARTIAL_WORD : WHOLE_WORD);
1496                 cursorForwardOneWord(cur);
1497         }
1498
1499         cur.recordUndoSelection();
1500
1501         pit_type begPit = from.pit();
1502         pit_type endPit = to.pit();
1503
1504         pos_type begPos = from.pos();
1505         pos_type endPos = to.pos();
1506
1507         pos_type right = 0; // needed after the for loop
1508
1509         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1510                 Paragraph & par = pars_[pit];
1511                 pos_type const pos = (pit == begPit ? begPos : 0);
1512                 right = (pit == endPit ? endPos : par.size());
1513                 par.changeCase(cur.buffer()->params(), pos, right, action);
1514         }
1515
1516         // the selection may have changed due to logically-only deleted chars
1517         if (gotsel) {
1518                 setCursor(cur, begPit, begPos);
1519                 cur.resetAnchor();
1520                 setCursor(cur, endPit, right);
1521                 cur.setSelection();
1522         } else
1523                 setCursor(cur, endPit, right);
1524
1525         cur.checkBufferStructure();
1526 }
1527
1528
1529 bool Text::handleBibitems(Cursor & cur)
1530 {
1531         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
1532                 return false;
1533
1534         if (cur.pos() != 0)
1535                 return false;
1536
1537         BufferParams const & bufparams = cur.buffer()->params();
1538         Paragraph const & par = cur.paragraph();
1539         Cursor prevcur = cur;
1540         if (cur.pit() > 0) {
1541                 --prevcur.pit();
1542                 prevcur.pos() = prevcur.lastpos();
1543         }
1544         Paragraph const & prevpar = prevcur.paragraph();
1545
1546         // if a bibitem is deleted, merge with previous paragraph
1547         // if this is a bibliography item as well
1548         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1549                 cur.recordUndo(prevcur.pit());
1550                 mergeParagraph(bufparams, cur.text()->paragraphs(),
1551                                                         prevcur.pit());
1552                 cur.forceBufferUpdate();
1553                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1554                 cur.screenUpdateFlags(Update::Force);
1555                 return true;
1556         }
1557
1558         // otherwise reset to default
1559         cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
1560         return true;
1561 }
1562
1563
1564 bool Text::erase(Cursor & cur)
1565 {
1566         LASSERT(this == cur.text(), return false);
1567         bool needsUpdate = false;
1568         Paragraph & par = cur.paragraph();
1569
1570         if (cur.pos() != cur.lastpos()) {
1571                 // this is the code for a normal delete, not pasting
1572                 // any paragraphs
1573                 cur.recordUndo(DELETE_UNDO);
1574                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1575                 if(!par.eraseChar(cur.pos(), cur.buffer()->params().track_changes))
1576                         // the character has been logically deleted only => skip it
1577                         cur.top().forwardPos();
1578
1579                 if (was_inset)
1580                         cur.forceBufferUpdate();
1581                 else
1582                         cur.checkBufferStructure();
1583                 needsUpdate = true;
1584         } else {
1585                 if (cur.pit() == cur.lastpit())
1586                         return dissolveInset(cur);
1587
1588                 if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().track_changes)) {
1589                         cur.recordUndo(DELETE_UNDO);
1590                         par.setChange(cur.pos(), Change(Change::DELETED));
1591                         cur.forwardPos();
1592                         needsUpdate = true;
1593                 } else {
1594                         setCursorIntern(cur, cur.pit() + 1, 0);
1595                         needsUpdate = backspacePos0(cur);
1596                 }
1597         }
1598
1599         needsUpdate |= handleBibitems(cur);
1600
1601         if (needsUpdate) {
1602                 // Make sure the cursor is correct. Is this really needed?
1603                 // No, not really... at least not here!
1604                 cur.top().setPitPos(cur.pit(), cur.pos());
1605                 cur.checkBufferStructure();
1606         }
1607
1608         return needsUpdate;
1609 }
1610
1611
1612 bool Text::backspacePos0(Cursor & cur)
1613 {
1614         LBUFERR(this == cur.text());
1615         if (cur.pit() == 0)
1616                 return false;
1617
1618         bool needsUpdate = false;
1619
1620         BufferParams const & bufparams = cur.buffer()->params();
1621         DocumentClass const & tclass = bufparams.documentClass();
1622         ParagraphList & plist = cur.text()->paragraphs();
1623         Paragraph const & par = cur.paragraph();
1624         Cursor prevcur = cur;
1625         --prevcur.pit();
1626         prevcur.pos() = prevcur.lastpos();
1627         Paragraph const & prevpar = prevcur.paragraph();
1628
1629         // is it an empty paragraph?
1630         if (cur.lastpos() == 0
1631             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1632                 cur.recordUndo(prevcur.pit());
1633                 plist.erase(lyx::next(plist.begin(), cur.pit()));
1634                 needsUpdate = true;
1635         }
1636         // is previous par empty?
1637         else if (prevcur.lastpos() == 0
1638                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1639                 cur.recordUndo(prevcur.pit());
1640                 plist.erase(lyx::next(plist.begin(), prevcur.pit()));
1641                 needsUpdate = true;
1642         }
1643         // Pasting is not allowed, if the paragraphs have different
1644         // layouts. I think it is a real bug of all other
1645         // word processors to allow it. It confuses the user.
1646         // Correction: Pasting is always allowed with standard-layout
1647         // or the empty layout.
1648         else if (par.layout() == prevpar.layout()
1649                  || tclass.isDefaultLayout(par.layout())
1650                  || tclass.isPlainLayout(par.layout())) {
1651                 cur.recordUndo(prevcur.pit());
1652                 mergeParagraph(bufparams, plist, prevcur.pit());
1653                 needsUpdate = true;
1654         }
1655
1656         if (needsUpdate) {
1657                 cur.forceBufferUpdate();
1658                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1659         }
1660
1661         return needsUpdate;
1662 }
1663
1664
1665 bool Text::backspace(Cursor & cur)
1666 {
1667         LBUFERR(this == cur.text());
1668         bool needsUpdate = false;
1669         if (cur.pos() == 0) {
1670                 if (cur.pit() == 0)
1671                         return dissolveInset(cur);
1672
1673                 Cursor prev_cur = cur;
1674                 --prev_cur.pit();
1675
1676                 if (!prev_cur.paragraph().isMergedOnEndOfParDeletion(cur.buffer()->params().track_changes)) {
1677                         cur.recordUndo(prev_cur.pit(), prev_cur.pit());
1678                         prev_cur.paragraph().setChange(prev_cur.lastpos(), Change(Change::DELETED));
1679                         setCursorIntern(cur, prev_cur.pit(), prev_cur.lastpos());
1680                         return true;
1681                 }
1682                 // The cursor is at the beginning of a paragraph, so
1683                 // the backspace will collapse two paragraphs into one.
1684                 needsUpdate = backspacePos0(cur);
1685
1686         } else {
1687                 // this is the code for a normal backspace, not pasting
1688                 // any paragraphs
1689                 cur.recordUndo(DELETE_UNDO);
1690                 // We used to do cursorBackwardIntern() here, but it is
1691                 // not a good idea since it triggers the auto-delete
1692                 // mechanism. So we do a cursorBackwardIntern()-lite,
1693                 // without the dreaded mechanism. (JMarc)
1694                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1695                                 false, cur.boundary());
1696                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1697                 cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().track_changes);
1698                 if (was_inset)
1699                         cur.forceBufferUpdate();
1700                 else
1701                         cur.checkBufferStructure();
1702         }
1703
1704         if (cur.pos() == cur.lastpos())
1705                 cur.setCurrentFont();
1706
1707         needsUpdate |= handleBibitems(cur);
1708
1709         // A singlePar update is not enough in this case.
1710 //              cur.screenUpdateFlags(Update::Force);
1711         cur.top().setPitPos(cur.pit(), cur.pos());
1712
1713         return needsUpdate;
1714 }
1715
1716
1717 bool Text::dissolveInset(Cursor & cur)
1718 {
1719         LASSERT(this == cur.text(), return false);
1720
1721         if (isMainText() || cur.inset().nargs() != 1)
1722                 return false;
1723
1724         cur.recordUndoInset();
1725         cur.setMark(false);
1726         cur.selHandle(false);
1727         // save position
1728         pos_type spos = cur.pos();
1729         pit_type spit = cur.pit();
1730         ParagraphList plist;
1731         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1732                 plist = paragraphs();
1733         cur.popBackward();
1734         // store cursor offset
1735         if (spit == 0)
1736                 spos += cur.pos();
1737         spit += cur.pit();
1738         Buffer & b = *cur.buffer();
1739         cur.paragraph().eraseChar(cur.pos(), b.params().track_changes);
1740
1741         if (!plist.empty()) {
1742                 // see bug 7319
1743                 // we clear the cache so that we won't get conflicts with labels
1744                 // that get pasted into the buffer. we should update this before
1745                 // its being empty matters. if not (i.e., if we encounter bugs),
1746                 // then this should instead be:
1747                 //        cur.buffer().updateBuffer();
1748                 // but we'll try the cheaper solution here.
1749                 cur.buffer()->clearReferenceCache();
1750
1751                 // ERT paragraphs have the Language latex_language.
1752                 // This is invalid outside of ERT, so we need to
1753                 // change it to the buffer language.
1754                 ParagraphList::iterator it = plist.begin();
1755                 ParagraphList::iterator it_end = plist.end();
1756                 for (; it != it_end; ++it)
1757                         it->changeLanguage(b.params(), latex_language, b.language());
1758
1759                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1760                                    b.errorList("Paste"));
1761                 // restore position
1762                 cur.pit() = min(cur.lastpit(), spit);
1763                 cur.pos() = min(cur.lastpos(), spos);
1764         }
1765
1766         cur.forceBufferUpdate();
1767
1768         // Ensure the current language is set correctly (bug 6292)
1769         cur.text()->setCursor(cur, cur.pit(), cur.pos());
1770         cur.clearSelection();
1771         cur.resetAnchor();
1772         return true;
1773 }
1774
1775
1776 void Text::getWord(CursorSlice & from, CursorSlice & to,
1777         word_location const loc) const
1778 {
1779         to = from;
1780         pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
1781 }
1782
1783
1784 void Text::write(ostream & os) const
1785 {
1786         Buffer const & buf = owner_->buffer();
1787         ParagraphList::const_iterator pit = paragraphs().begin();
1788         ParagraphList::const_iterator end = paragraphs().end();
1789         depth_type dth = 0;
1790         for (; pit != end; ++pit)
1791                 pit->write(os, buf.params(), dth);
1792
1793         // Close begin_deeper
1794         for(; dth > 0; --dth)
1795                 os << "\n\\end_deeper";
1796 }
1797
1798
1799 bool Text::read(Lexer & lex,
1800                 ErrorList & errorList, InsetText * insetPtr)
1801 {
1802         Buffer const & buf = owner_->buffer();
1803         depth_type depth = 0;
1804         bool res = true;
1805
1806         while (lex.isOK()) {
1807                 lex.nextToken();
1808                 string const token = lex.getString();
1809
1810                 if (token.empty())
1811                         continue;
1812
1813                 if (token == "\\end_inset")
1814                         break;
1815
1816                 if (token == "\\end_body")
1817                         continue;
1818
1819                 if (token == "\\begin_body")
1820                         continue;
1821
1822                 if (token == "\\end_document") {
1823                         res = false;
1824                         break;
1825                 }
1826
1827                 if (token == "\\begin_layout") {
1828                         lex.pushToken(token);
1829
1830                         Paragraph par;
1831                         par.setInsetOwner(insetPtr);
1832                         par.params().depth(depth);
1833                         par.setFont(0, Font(inherit_font, buf.params().language));
1834                         pars_.push_back(par);
1835                         readParagraph(pars_.back(), lex, errorList);
1836
1837                         // register the words in the global word list
1838                         pars_.back().updateWords();
1839                 } else if (token == "\\begin_deeper") {
1840                         ++depth;
1841                 } else if (token == "\\end_deeper") {
1842                         if (!depth)
1843                                 lex.printError("\\end_deeper: " "depth is already null");
1844                         else
1845                                 --depth;
1846                 } else {
1847                         LYXERR0("Handling unknown body token: `" << token << '\'');
1848                 }
1849         }
1850
1851         // avoid a crash on weird documents (bug 4859)
1852         if (pars_.empty()) {
1853                 Paragraph par;
1854                 par.setInsetOwner(insetPtr);
1855                 par.params().depth(depth);
1856                 par.setFont(0, Font(inherit_font,
1857                                     buf.params().language));
1858                 par.setPlainOrDefaultLayout(buf.params().documentClass());
1859                 pars_.push_back(par);
1860         }
1861
1862         return res;
1863 }
1864
1865
1866 // Returns the current font and depth as a message.
1867 docstring Text::currentState(Cursor const & cur) const
1868 {
1869         LBUFERR(this == cur.text());
1870         Buffer & buf = *cur.buffer();
1871         Paragraph const & par = cur.paragraph();
1872         odocstringstream os;
1873
1874         if (buf.params().track_changes)
1875                 os << _("[Change Tracking] ");
1876
1877         Change change = par.lookupChange(cur.pos());
1878
1879         if (change.changed()) {
1880                 docstring const author =
1881                         buf.params().authors().get(change.author).nameAndEmail();
1882                 docstring const date = formatted_datetime(change.changetime);
1883                 os << bformat(_("Changed by %1$s[[author]] on %2$s[[date]]. "),
1884                               author, date);
1885         }
1886
1887         // I think we should only show changes from the default
1888         // font. (Asger)
1889         // No, from the document font (MV)
1890         Font font = cur.real_current_font;
1891         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1892
1893         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1894
1895         // The paragraph depth
1896         int depth = cur.paragraph().getDepth();
1897         if (depth > 0)
1898                 os << bformat(_(", Depth: %1$d"), depth);
1899
1900         // The paragraph spacing, but only if different from
1901         // buffer spacing.
1902         Spacing const & spacing = par.params().spacing();
1903         if (!spacing.isDefault()) {
1904                 os << _(", Spacing: ");
1905                 switch (spacing.getSpace()) {
1906                 case Spacing::Single:
1907                         os << _("Single");
1908                         break;
1909                 case Spacing::Onehalf:
1910                         os << _("OneHalf");
1911                         break;
1912                 case Spacing::Double:
1913                         os << _("Double");
1914                         break;
1915                 case Spacing::Other:
1916                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1917                         break;
1918                 case Spacing::Default:
1919                         // should never happen, do nothing
1920                         break;
1921                 }
1922         }
1923
1924 #ifdef DEVEL_VERSION
1925         os << _(", Inset: ") << &cur.inset();
1926         os << _(", Paragraph: ") << cur.pit();
1927         os << _(", Id: ") << par.id();
1928         os << _(", Position: ") << cur.pos();
1929         // FIXME: Why is the check for par.size() needed?
1930         // We are called with cur.pos() == par.size() quite often.
1931         if (!par.empty() && cur.pos() < par.size()) {
1932                 // Force output of code point, not character
1933                 size_t const c = par.getChar(cur.pos());
1934                 os << _(", Char: 0x") << hex << c;
1935         }
1936         os << _(", Boundary: ") << cur.boundary();
1937 //      Row & row = cur.textRow();
1938 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1939 #endif
1940         return os.str();
1941 }
1942
1943
1944 docstring Text::getPossibleLabel(Cursor const & cur) const
1945 {
1946         pit_type pit = cur.pit();
1947
1948         Layout const * layout = &(pars_[pit].layout());
1949
1950         docstring text;
1951         docstring par_text = pars_[pit].asString();
1952
1953         // The return string of math matrices might contain linebreaks
1954         par_text = subst(par_text, '\n', '-');
1955         int const numwords = 3;
1956         for (int i = 0; i < numwords; ++i) {
1957                 if (par_text.empty())
1958                         break;
1959                 docstring head;
1960                 par_text = split(par_text, head, ' ');
1961                 // Is it legal to use spaces in labels ?
1962                 if (i > 0)
1963                         text += '-';
1964                 text += head;
1965         }
1966
1967         // Make sure it isn't too long
1968         unsigned int const max_label_length = 32;
1969         if (text.size() > max_label_length)
1970                 text.resize(max_label_length);
1971
1972         // Will contain the label prefix.
1973         docstring name;
1974
1975         // For section, subsection, etc...
1976         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1977                 Layout const * layout2 = &(pars_[pit - 1].layout());
1978                 if (layout2->latextype != LATEX_PARAGRAPH) {
1979                         --pit;
1980                         layout = layout2;
1981                 }
1982         }
1983         if (layout->latextype != LATEX_PARAGRAPH)
1984                 name = layout->refprefix;
1985
1986         // For captions, we just take the caption type
1987         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1988         if (caption_inset) {
1989                 string const & ftype = static_cast<InsetCaption *>(caption_inset)->floattype();
1990                 FloatList const & fl = cur.buffer()->params().documentClass().floats();
1991                 if (fl.typeExist(ftype)) {
1992                         Floating const & flt = fl.getType(ftype);
1993                         name = from_utf8(flt.refPrefix());
1994                 }
1995                 if (name.empty())
1996                         name = from_utf8(ftype.substr(0,3));
1997         }
1998
1999         // If none of the above worked, see if the inset knows.
2000         if (name.empty()) {
2001                 InsetLayout const & il = cur.inset().getLayout();
2002                 name = il.refprefix();
2003         }
2004
2005         if (!name.empty())
2006                 text = name + ':' + text;
2007
2008         // We need a unique label
2009         docstring label = text;
2010         int i = 1;
2011         while (cur.buffer()->insetLabel(label)) {
2012                         label = text + '-' + convert<docstring>(i);
2013                         ++i;
2014                 }
2015
2016         return label;
2017 }
2018
2019
2020 docstring Text::asString(int options) const
2021 {
2022         return asString(0, pars_.size(), options);
2023 }
2024
2025
2026 docstring Text::asString(pit_type beg, pit_type end, int options) const
2027 {
2028         size_t i = size_t(beg);
2029         docstring str = pars_[i].asString(options);
2030         for (++i; i != size_t(end); ++i) {
2031                 str += '\n';
2032                 str += pars_[i].asString(options);
2033         }
2034         return str;
2035 }
2036
2037
2038 void Text::shortenForOutliner(docstring & str, size_t const maxlen)
2039 {
2040         support::truncateWithEllipsis(str, maxlen);
2041         docstring::iterator it = str.begin();
2042         docstring::iterator end = str.end();
2043         for (; it != end; ++it)
2044                 if ((*it) == L'\n' || (*it) == L'\t')
2045                         (*it) = L' ';
2046 }
2047
2048
2049 void Text::forOutliner(docstring & os, size_t const maxlen,
2050                                            bool const shorten) const
2051 {
2052         size_t tmplen = shorten ? maxlen + 1 : maxlen;
2053         for (size_t i = 0; i != pars_.size() && os.length() < tmplen; ++i)
2054                 pars_[i].forOutliner(os, tmplen, false);
2055         if (shorten)
2056                 shortenForOutliner(os, maxlen);
2057 }
2058
2059
2060 void Text::charsTranspose(Cursor & cur)
2061 {
2062         LBUFERR(this == cur.text());
2063
2064         pos_type pos = cur.pos();
2065
2066         // If cursor is at beginning or end of paragraph, do nothing.
2067         if (pos == cur.lastpos() || pos == 0)
2068                 return;
2069
2070         Paragraph & par = cur.paragraph();
2071
2072         // Get the positions of the characters to be transposed.
2073         pos_type pos1 = pos - 1;
2074         pos_type pos2 = pos;
2075
2076         // In change tracking mode, ignore deleted characters.
2077         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
2078                 ++pos2;
2079         if (pos2 == cur.lastpos())
2080                 return;
2081
2082         while (pos1 >= 0 && par.isDeleted(pos1))
2083                 --pos1;
2084         if (pos1 < 0)
2085                 return;
2086
2087         // Don't do anything if one of the "characters" is not regular text.
2088         if (par.isInset(pos1) || par.isInset(pos2))
2089                 return;
2090
2091         // Store the characters to be transposed (including font information).
2092         char_type const char1 = par.getChar(pos1);
2093         Font const font1 =
2094                 par.getFontSettings(cur.buffer()->params(), pos1);
2095
2096         char_type const char2 = par.getChar(pos2);
2097         Font const font2 =
2098                 par.getFontSettings(cur.buffer()->params(), pos2);
2099
2100         // And finally, we are ready to perform the transposition.
2101         // Track the changes if Change Tracking is enabled.
2102         bool const trackChanges = cur.buffer()->params().track_changes;
2103
2104         cur.recordUndo();
2105
2106         par.eraseChar(pos2, trackChanges);
2107         par.eraseChar(pos1, trackChanges);
2108         par.insertChar(pos1, char2, font2, trackChanges);
2109         par.insertChar(pos2, char1, font1, trackChanges);
2110
2111         cur.checkBufferStructure();
2112
2113         // After the transposition, move cursor to after the transposition.
2114         setCursor(cur, cur.pit(), pos2);
2115         cur.forwardPos();
2116 }
2117
2118
2119 DocIterator Text::macrocontextPosition() const
2120 {
2121         return macrocontext_position_;
2122 }
2123
2124
2125 void Text::setMacrocontextPosition(DocIterator const & pos)
2126 {
2127         macrocontext_position_ = pos;
2128 }
2129
2130
2131 docstring Text::previousWord(CursorSlice const & sl) const
2132 {
2133         CursorSlice from = sl;
2134         CursorSlice to = sl;
2135         getWord(from, to, PREVIOUS_WORD);
2136         if (sl == from || to == from)
2137                 return docstring();
2138
2139         Paragraph const & par = sl.paragraph();
2140         return par.asString(from.pos(), to.pos());
2141 }
2142
2143
2144 bool Text::completionSupported(Cursor const & cur) const
2145 {
2146         Paragraph const & par = cur.paragraph();
2147         return cur.pos() > 0
2148                 && (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
2149                 && !par.isWordSeparator(cur.pos() - 1);
2150 }
2151
2152
2153 CompletionList const * Text::createCompletionList(Cursor const & cur) const
2154 {
2155         WordList const * list = theWordList(cur.getFont().language()->lang());
2156         return new TextCompletionList(cur, list);
2157 }
2158
2159
2160 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
2161 {
2162         LBUFERR(cur.bv().cursor() == cur);
2163         cur.insert(s);
2164         cur.bv().cursor() = cur;
2165         if (!(cur.result().screenUpdate() & Update::Force))
2166                 cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
2167         return true;
2168 }
2169
2170
2171 docstring Text::completionPrefix(Cursor const & cur) const
2172 {
2173         return previousWord(cur.top());
2174 }
2175
2176 } // namespace lyx