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