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(), /**/);
 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()), pos_(0), 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         size_t pos_;
 608         ///
 609         WordList const * list_;
 610 };
 611
 612
 613 bool Text::empty() const
 614 {
 615         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 616                 // FIXME: Should we consider the labeled type as empty too?
 617                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 618 }
 619
 620
 621 double Text::spacing(Paragraph const & par) const
 622 {
 623         if (par.params().spacing().isDefault())
 624                 return owner_->buffer().params().spacing().getValue();
 625         return par.params().spacing().getValue();
 626 }
 627
 628
 629 /**
 630  * This breaks a paragraph at the specified position.
 631  * The new paragraph will:
 632  * - Decrease depth by one (or change layout to default layout) when
 633  *    keep_layout == false
 634  * - keep current depth and layout when keep_layout == true
 635  */
 636 static void breakParagraph(Text & text, pit_type par_offset, pos_type pos,
 637                     bool keep_layout)
 638 {
 639         BufferParams const & bparams = text.inset().buffer().params();
 640         ParagraphList & pars = text.paragraphs();
 641         // create a new paragraph, and insert into the list
 642         ParagraphList::iterator tmp =
 643                 pars.insert(boost::next(pars.begin(), par_offset + 1),
 644                             Paragraph());
 645
 646         Paragraph & par = pars[par_offset];
 647
 648         // remember to set the inset_owner
 649         tmp->setInsetOwner(&par.inInset());
 650         // without doing that we get a crash when typing <Return> at the
 651         // end of a paragraph
 652         tmp->setPlainOrDefaultLayout(bparams.documentClass());
 653
 654         if (keep_layout) {
 655                 tmp->setLayout(par.layout());
 656                 tmp->setLabelWidthString(par.params().labelWidthString());
 657                 tmp->params().depth(par.params().depth());
 658         } else if (par.params().depth() > 0) {
 659                 Paragraph const & hook = pars[text.outerHook(par_offset)];
 660                 tmp->setLayout(hook.layout());
 661                 // not sure the line below is useful
 662                 tmp->setLabelWidthString(par.params().labelWidthString());
 663                 tmp->params().depth(hook.params().depth());
 664         }
 665
 666         bool const isempty = (par.allowEmpty() && par.empty());
 667
 668         if (!isempty && (par.size() > pos || par.empty())) {
 669                 tmp->setLayout(par.layout());
 670                 tmp->params().align(par.params().align());
 671                 tmp->setLabelWidthString(par.params().labelWidthString());
 672
 673                 tmp->params().depth(par.params().depth());
 674                 tmp->params().noindent(par.params().noindent());
 675
 676                 // move everything behind the break position
 677                 // to the new paragraph
 678
 679                 /* Note: if !keepempty, empty() == true, then we reach
 680                  * here with size() == 0. So pos_end becomes - 1. This
 681                  * doesn't cause problems because both loops below
 682                  * enforce pos <= pos_end and 0 <= pos
 683                  */
 684                 pos_type pos_end = par.size() - 1;
 685
 686                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 687                         if (moveItem(par, pos, *tmp, j, bparams)) {
 688                                 ++j;
 689                         }
 690                 }
 691         }
 692
 693         // Move over the end-of-par change information
 694         tmp->setChange(tmp->size(), par.lookupChange(par.size()));
 695         par.setChange(par.size(), Change(bparams.trackChanges ?
 696                                            Change::INSERTED : Change::UNCHANGED));
 697
 698         if (pos) {
 699                 // Make sure that we keep the language when
 700                 // breaking paragraph.
 701                 if (tmp->empty()) {
 702                         Font changed = tmp->getFirstFontSettings(bparams);
 703                         Font const & old = par.getFontSettings(bparams, par.size());
 704                         changed.setLanguage(old.language());
 705                         tmp->setFont(0, changed);
 706                 }
 707
 708                 return;
 709         }
 710
 711         if (!isempty) {
 712                 bool const soa = par.params().startOfAppendix();
 713                 par.params().clear();
 714                 // do not lose start of appendix marker (bug 4212)
 715                 par.params().startOfAppendix(soa);
 716                 par.setPlainOrDefaultLayout(bparams.documentClass());
 717         }
 718
 719         if (keep_layout) {
 720                 par.setLayout(tmp->layout());
 721                 par.setLabelWidthString(tmp->params().labelWidthString());
 722                 par.params().depth(tmp->params().depth());
 723         }
 724 }
 725
 726
 727 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 728 {
 729         LASSERT(this == cur.text(), /**/);
 730
 731         Paragraph & cpar = cur.paragraph();
 732         pit_type cpit = cur.pit();
 733
 734         DocumentClass const & tclass = cur.buffer()->params().documentClass();
 735         Layout const & layout = cpar.layout();
 736
 737         if (cur.lastpos() == 0 && !cpar.allowEmpty()) {
 738                 if (changeDepthAllowed(cur, DEC_DEPTH))
 739                         changeDepth(cur, DEC_DEPTH);
 740                 else
 741                         setLayout(cur, tclass.defaultLayoutName());
 742                 return;
 743         }
 744
 745         cur.recordUndo();
 746
 747         // Always break behind a space
 748         // It is better to erase the space (Dekel)
 749         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 750                 cpar.eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
 751
 752         // What should the layout for the new paragraph be?
 753         bool keep_layout = layout.isEnvironment()
 754                 || (layout.isParagraph() && layout.parbreak_is_newline);
 755         if (inverse_logic)
 756                 keep_layout = !keep_layout;
 757
 758         // We need to remember this before we break the paragraph, because
 759         // that invalidates the layout variable
 760         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 761
 762         // we need to set this before we insert the paragraph.
 763         bool const isempty = cpar.allowEmpty() && cpar.empty();
 764
 765         lyx::breakParagraph(*this, cpit, cur.pos(), keep_layout);
 766
 767         // After this, neither paragraph contains any rows!
 768
 769         cpit = cur.pit();
 770         pit_type next_par = cpit + 1;
 771
 772         // well this is the caption hack since one caption is really enough
 773         if (sensitive) {
 774                 if (cur.pos() == 0)
 775                         // set to standard-layout
 776                 //FIXME Check if this should be plainLayout() in some cases
 777                         pars_[cpit].applyLayout(tclass.defaultLayout());
 778                 else
 779                         // set to standard-layout
 780                         //FIXME Check if this should be plainLayout() in some cases
 781                         pars_[next_par].applyLayout(tclass.defaultLayout());
 782         }
 783
 784         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 785                 if (!pars_[next_par].eraseChar(0, cur.buffer()->params().trackChanges))
 786                         break; // the character couldn't be deleted physically due to change tracking
 787         }
 788
 789         // A singlePar update is not enough in this case.
 790         cur.screenUpdateFlags(Update::Force);
 791         cur.forceBufferUpdate();
 792
 793         // This check is necessary. Otherwise the new empty paragraph will
 794         // be deleted automatically. And it is more friendly for the user!
 795         if (cur.pos() != 0 || isempty)
 796                 setCursor(cur, cur.pit() + 1, 0);
 797         else
 798                 setCursor(cur, cur.pit(), 0);
 799 }
 800
 801
 802 // needed to insert the selection
 803 void Text::insertStringAsLines(Cursor & cur, docstring const & str,
 804                 Font const & font)
 805 {
 806         BufferParams const & bparams = owner_->buffer().params();
 807         pit_type pit = cur.pit();
 808         pos_type pos = cur.pos();
 809
 810         // insert the string, don't insert doublespace
 811         bool space_inserted = true;
 812         for (docstring::const_iterator cit = str.begin();
 813             cit != str.end(); ++cit) {
 814                 Paragraph & par = pars_[pit];
 815                 if (*cit == '\n') {
 816                         if (autoBreakRows_ && (!par.empty() || par.allowEmpty())) {
 817                                 lyx::breakParagraph(*this, pit, pos,
 818                                         par.layout().isEnvironment());
 819                                 ++pit;
 820                                 pos = 0;
 821                                 space_inserted = true;
 822                         } else {
 823                                 continue;
 824                         }
 825                         // do not insert consecutive spaces if !free_spacing
 826                 } else if ((*cit == ' ' || *cit == '\t') &&
 827                            space_inserted && !par.isFreeSpacing()) {
 828                         continue;
 829                 } else if (*cit == '\t') {
 830                         if (!par.isFreeSpacing()) {
 831                                 // tabs are like spaces here
 832                                 par.insertChar(pos, ' ', font, bparams.trackChanges);
 833                                 ++pos;
 834                                 space_inserted = true;
 835                         } else {
 836                                 par.insertChar(pos, *cit, font, bparams.trackChanges);
 837                                 ++pos;
 838                                 space_inserted = true;
 839                         }
 840                 } else if (!isPrintable(*cit)) {
 841                         // Ignore unprintables
 842                         continue;
 843                 } else {
 844                         // just insert the character
 845                         par.insertChar(pos, *cit, font, bparams.trackChanges);
 846                         ++pos;
 847                         space_inserted = (*cit == ' ');
 848                 }
 849         }
 850         setCursor(cur, pit, pos);
 851 }
 852
 853
 854 // turn double CR to single CR, others are converted into one
 855 // blank. Then insertStringAsLines is called
 856 void Text::insertStringAsParagraphs(Cursor & cur, docstring const & str,
 857                 Font const & font)
 858 {
 859         docstring linestr = str;
 860         bool newline_inserted = false;
 861
 862         for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 863                 if (linestr[i] == '\n') {
 864                         if (newline_inserted) {
 865                                 // we know that \r will be ignored by
 866                                 // insertStringAsLines. Of course, it is a dirty
 867                                 // trick, but it works...
 868                                 linestr[i - 1] = '\r';
 869                                 linestr[i] = '\n';
 870                         } else {
 871                                 linestr[i] = ' ';
 872                                 newline_inserted = true;
 873                         }
 874                 } else if (isPrintable(linestr[i])) {
 875                         newline_inserted = false;
 876                 }
 877         }
 878         insertStringAsLines(cur, linestr, font);
 879 }
 880
 881
 882 // insert a character, moves all the following breaks in the
 883 // same Paragraph one to the right and make a rebreak
 884 void Text::insertChar(Cursor & cur, char_type c)
 885 {
 886         LASSERT(this == cur.text(), /**/);
 887
 888         cur.recordUndo(INSERT_UNDO);
 889
 890         TextMetrics const & tm = cur.bv().textMetrics(this);
 891         Buffer const & buffer = *cur.buffer();
 892         Paragraph & par = cur.paragraph();
 893         // try to remove this
 894         pit_type const pit = cur.pit();
 895
 896         bool const freeSpacing = par.layout().free_spacing ||
 897                 par.isFreeSpacing();
 898
 899         if (lyxrc.auto_number) {
 900                 static docstring const number_operators = from_ascii("+-/*");
 901                 static docstring const number_unary_operators = from_ascii("+-");
 902                 static docstring const number_seperators = from_ascii(".,:");
 903
 904                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 905                         if (!isDigitASCII(c) && !contains(number_operators, c) &&
 906                             !(contains(number_seperators, c) &&
 907                               cur.pos() != 0 &&
 908                               cur.pos() != cur.lastpos() &&
 909                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 910                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 911                            )
 912                                 number(cur); // Set current_font.number to OFF
 913                 } else if (isDigitASCII(c) &&
 914                            cur.real_current_font.isVisibleRightToLeft()) {
 915                         number(cur); // Set current_font.number to ON
 916
 917                         if (cur.pos() != 0) {
 918                                 char_type const c = par.getChar(cur.pos() - 1);
 919                                 if (contains(number_unary_operators, c) &&
 920                                     (cur.pos() == 1
 921                                      || par.isSeparator(cur.pos() - 2)
 922                                      || par.isNewline(cur.pos() - 2))
 923                                   ) {
 924                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 925                                                 tm.font_);
 926                                 } else if (contains(number_seperators, c)
 927                                      && cur.pos() >= 2
 928                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 929                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 930                                                 tm.font_);
 931                                 }
 932                         }
 933                 }
 934         }
 935
 936         // In Bidi text, we want spaces to be treated in a special way: spaces
 937         // which are between words in different languages should get the
 938         // paragraph's language; otherwise, spaces should keep the language
 939         // they were originally typed in. This is only in effect while typing;
 940         // after the text is already typed in, the user can always go back and
 941         // explicitly set the language of a space as desired. But 99.9% of the
 942         // time, what we're doing here is what the user actually meant.
 943         //
 944         // The following cases are the ones in which the language of the space
 945         // should be changed to match that of the containing paragraph. In the
 946         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 947         // represents a space, pipe (|) represents the cursor position (so the
 948         // character before it is the one just typed in). The different cases
 949         // are depicted logically (not visually), from left to right:
 950         //
 951         // 1. A_a|
 952         // 2. a_A|
 953         //
 954         // Theoretically, there are other situations that we should, perhaps, deal
 955         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 956         // point (to understand why, just try to create this situation...).
 957
 958         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 959                 // get font in front and behind the space in question. But do NOT
 960                 // use getFont(cur.pos()) because the character c is not inserted yet
 961                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 962                 Font const & post_space_font = cur.real_current_font;
 963                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 964                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 965
 966                 if (pre_space_rtl != post_space_rtl) {
 967                         // Set the space's language to match the language of the
 968                         // adjacent character whose direction is the paragraph's
 969                         // direction; don't touch other properties of the font
 970                         Language const * lang =
 971                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 972                                 pre_space_font.language() : post_space_font.language();
 973
 974                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
 975                         space_font.setLanguage(lang);
 976                         par.setFont(cur.pos() - 1, space_font);
 977                 }
 978         }
 979
 980         // Next check, if there will be two blanks together or a blank at
 981         // the beginning of a paragraph.
 982         // I decided to handle blanks like normal characters, the main
 983         // difference are the special checks when calculating the row.fill
 984         // (blank does not count at the end of a row) and the check here
 985
 986         // When the free-spacing option is set for the current layout,
 987         // disable the double-space checking
 988         if (!freeSpacing && isLineSeparatorChar(c)) {
 989                 if (cur.pos() == 0) {
 990                         cur.message(_(
 991                                         "You cannot insert a space at the "
 992                                         "beginning of a paragraph. Please read the Tutorial."));
 993                         return;
 994                 }
 995                 LASSERT(cur.pos() > 0, /**/);
 996                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 997                                 && !par.isDeleted(cur.pos() - 1)) {
 998                         cur.message(_(
 999                                         "You cannot type two spaces this way. "
1000                                         "Please read the Tutorial."));
1001                         return;
1002                 }
1003         }
1004
1005         par.insertChar(cur.pos(), c, cur.current_font,
1006                 cur.buffer()->params().trackChanges);
1007         cur.checkBufferStructure();
1008
1009 //              cur.screenUpdateFlags(Update::Force);
1010         bool boundary = cur.boundary()
1011                 || tm.isRTLBoundary(cur.pit(), cur.pos() + 1);
1012         setCursor(cur, cur.pit(), cur.pos() + 1, false, boundary);
1013         charInserted(cur);
1014 }
1015
1016
1017 void Text::charInserted(Cursor & cur)
1018 {
1019         Paragraph & par = cur.paragraph();
1020
1021         // Here we call finishUndo for every 20 characters inserted.
1022         // This is from my experience how emacs does it. (Lgb)
1023         if (undo_counter_ < 20) {
1024                 ++undo_counter_;
1025         } else {
1026                 cur.finishUndo();
1027                 undo_counter_ = 0;
1028         }
1029
1030         // register word if a non-letter was entered
1031         if (cur.pos() > 1
1032             && !par.isWordSeparator(cur.pos() - 2)
1033             && par.isWordSeparator(cur.pos() - 1)) {
1034                 // get the word in front of cursor
1035                 LASSERT(this == cur.text(), /**/);
1036                 cur.paragraph().updateWords();
1037         }
1038 }
1039
1040
1041 // the cursor set functions have a special mechanism. When they
1042 // realize, that you left an empty paragraph, they will delete it.
1043
1044 bool Text::cursorForwardOneWord(Cursor & cur)
1045 {
1046         LASSERT(this == cur.text(), /**/);
1047
1048         pos_type const lastpos = cur.lastpos();
1049         pit_type pit = cur.pit();
1050         pos_type pos = cur.pos();
1051         Paragraph const & par = cur.paragraph();
1052
1053         // Paragraph boundary is a word boundary
1054         if (pos == lastpos) {
1055                 if (pit != cur.lastpit())
1056                         return setCursor(cur, pit + 1, 0);
1057                 else
1058                         return false;
1059         }
1060
1061         if (lyxrc.mac_like_word_movement) {
1062                 // Skip through trailing punctuation and spaces.
1063                 while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
1064                         ++pos;
1065
1066                 // Skip over either a non-char inset or a full word
1067                 if (pos != lastpos && par.isWordSeparator(pos))
1068                         ++pos;
1069                 else while (pos != lastpos && !par.isWordSeparator(pos))
1070                              ++pos;
1071         } else {
1072                 LASSERT(pos < lastpos, /**/); // see above
1073                 if (!par.isWordSeparator(pos))
1074                         while (pos != lastpos && !par.isWordSeparator(pos))
1075                                 ++pos;
1076                 else if (par.isChar(pos))
1077                         while (pos != lastpos && par.isChar(pos))
1078                                 ++pos;
1079                 else if (!par.isSpace(pos)) // non-char inset
1080                         ++pos;
1081
1082                 // Skip over white space
1083                 while (pos != lastpos && par.isSpace(pos))
1084                              ++pos;
1085         }
1086
1087         return setCursor(cur, pit, pos);
1088 }
1089
1090
1091 bool Text::cursorBackwardOneWord(Cursor & cur)
1092 {
1093         LASSERT(this == cur.text(), /**/);
1094
1095         pit_type pit = cur.pit();
1096         pos_type pos = cur.pos();
1097         Paragraph & par = cur.paragraph();
1098
1099         // Paragraph boundary is a word boundary
1100         if (pos == 0 && pit != 0)
1101                 return setCursor(cur, pit - 1, getPar(pit - 1).size());
1102
1103         if (lyxrc.mac_like_word_movement) {
1104                 // Skip through punctuation and spaces.
1105                 while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
1106                         --pos;
1107
1108                 // Skip over either a non-char inset or a full word
1109                 if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
1110                         --pos;
1111                 else while (pos != 0 && !par.isWordSeparator(pos - 1))
1112                              --pos;
1113         } else {
1114                 // Skip over white space
1115                 while (pos != 0 && par.isSpace(pos - 1))
1116                              --pos;
1117
1118                 if (pos != 0 && !par.isWordSeparator(pos - 1))
1119                         while (pos != 0 && !par.isWordSeparator(pos - 1))
1120                                 --pos;
1121                 else if (pos != 0 && par.isChar(pos - 1))
1122                         while (pos != 0 && par.isChar(pos - 1))
1123                                 --pos;
1124                 else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
1125                         --pos;
1126         }
1127
1128         return setCursor(cur, pit, pos);
1129 }
1130
1131
1132 bool Text::cursorVisLeftOneWord(Cursor & cur)
1133 {
1134         LASSERT(this == cur.text(), /**/);
1135
1136         pos_type left_pos, right_pos;
1137         bool left_is_letter, right_is_letter;
1138
1139         Cursor temp_cur = cur;
1140
1141         // always try to move at least once...
1142         while (temp_cur.posVisLeft(true /* skip_inset */)) {
1143
1144                 // collect some information about current cursor position
1145                 temp_cur.getSurroundingPos(left_pos, right_pos);
1146                 left_is_letter =
1147                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1148                 right_is_letter =
1149                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1150
1151                 // if we're not at a letter/non-letter boundary, continue moving
1152                 if (left_is_letter == right_is_letter)
1153                         continue;
1154
1155                 // we should stop when we have an LTR word on our right or an RTL word
1156                 // on our left
1157                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1158                                 temp_cur.buffer()->params(), left_pos).isRightToLeft())
1159                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1160                                 temp_cur.buffer()->params(), right_pos).isRightToLeft()))
1161                         break;
1162         }
1163
1164         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1165                                          true, temp_cur.boundary());
1166 }
1167
1168
1169 bool Text::cursorVisRightOneWord(Cursor & cur)
1170 {
1171         LASSERT(this == cur.text(), /**/);
1172
1173         pos_type left_pos, right_pos;
1174         bool left_is_letter, right_is_letter;
1175
1176         Cursor temp_cur = cur;
1177
1178         // always try to move at least once...
1179         while (temp_cur.posVisRight(true /* skip_inset */)) {
1180
1181                 // collect some information about current cursor position
1182                 temp_cur.getSurroundingPos(left_pos, right_pos);
1183                 left_is_letter =
1184                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1185                 right_is_letter =
1186                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1187
1188                 // if we're not at a letter/non-letter boundary, continue moving
1189                 if (left_is_letter == right_is_letter)
1190                         continue;
1191
1192                 // we should stop when we have an LTR word on our right or an RTL word
1193                 // on our left
1194                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1195                                 temp_cur.buffer()->params(),
1196                                 left_pos).isRightToLeft())
1197                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1198                                 temp_cur.buffer()->params(),
1199                                 right_pos).isRightToLeft()))
1200                         break;
1201         }
1202
1203         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1204                                          true, temp_cur.boundary());
1205 }
1206
1207
1208 void Text::selectWord(Cursor & cur, word_location loc)
1209 {
1210         LASSERT(this == cur.text(), /**/);
1211         CursorSlice from = cur.top();
1212         CursorSlice to = cur.top();
1213         getWord(from, to, loc);
1214         if (cur.top() != from)
1215                 setCursor(cur, from.pit(), from.pos());
1216         if (to == from)
1217                 return;
1218         if (!cur.selection())
1219                 cur.resetAnchor();
1220         setCursor(cur, to.pit(), to.pos());
1221         cur.setSelection();
1222         cur.setWordSelection(true);
1223 }
1224
1225
1226 void Text::selectAll(Cursor & cur)
1227 {
1228         LASSERT(this == cur.text(), /**/);
1229         if (cur.lastpos() == 0 && cur.lastpit() == 0)
1230                 return;
1231         // If the cursor is at the beginning, make sure the cursor ends there
1232         if (cur.pit() == 0 && cur.pos() == 0) {
1233                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1234                 cur.resetAnchor();
1235                 setCursor(cur, 0, 0);
1236         } else {
1237                 setCursor(cur, 0, 0);
1238                 cur.resetAnchor();
1239                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1240         }
1241         cur.setSelection();
1242 }
1243
1244
1245 // Select the word currently under the cursor when no
1246 // selection is currently set
1247 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
1248 {
1249         LASSERT(this == cur.text(), /**/);
1250         if (cur.selection())
1251                 return false;
1252         selectWord(cur, loc);
1253         return cur.selection();
1254 }
1255
1256
1257 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
1258 {
1259         LASSERT(this == cur.text(), /**/);
1260
1261         if (!cur.selection()) {
1262                 bool const changed = cur.paragraph().isChanged(cur.pos());
1263                 if (!(changed && findNextChange(&cur.bv())))
1264                         return;
1265         }
1266
1267         cur.recordUndoSelection();
1268
1269         pit_type begPit = cur.selectionBegin().pit();
1270         pit_type endPit = cur.selectionEnd().pit();
1271
1272         pos_type begPos = cur.selectionBegin().pos();
1273         pos_type endPos = cur.selectionEnd().pos();
1274
1275         // keep selection info, because endPos becomes invalid after the first loop
1276         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
1277
1278         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
1279
1280         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1281                 pos_type parSize = pars_[pit].size();
1282
1283                 // ignore empty paragraphs; otherwise, an assertion will fail for
1284                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
1285                 if (parSize == 0)
1286                         continue;
1287
1288                 // do not consider first paragraph if the cursor starts at pos size()
1289                 if (pit == begPit && begPos == parSize)
1290                         continue;
1291
1292                 // do not consider last paragraph if the cursor ends at pos 0
1293                 if (pit == endPit && endPos == 0)
1294                         break; // last iteration anyway
1295
1296                 pos_type left  = (pit == begPit ? begPos : 0);
1297                 pos_type right = (pit == endPit ? endPos : parSize);
1298
1299                 if (left == right)
1300                         // there is no change here
1301                         continue;
1302
1303                 if (op == ACCEPT) {
1304                         pars_[pit].acceptChanges(left, right);
1305                 } else {
1306                         pars_[pit].rejectChanges(left, right);
1307                 }
1308         }
1309
1310         // next, accept/reject imaginary end-of-par characters
1311
1312         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1313                 pos_type pos = pars_[pit].size();
1314
1315                 // skip if the selection ends before the end-of-par
1316                 if (pit == endPit && endsBeforeEndOfPar)
1317                         break; // last iteration anyway
1318
1319                 // skip if this is not the last paragraph of the document
1320                 // note: the user should be able to accept/reject the par break of the last par!
1321                 if (pit == endPit && pit + 1 != int(pars_.size()))
1322                         break; // last iteration anway
1323
1324                 if (op == ACCEPT) {
1325                         if (pars_[pit].isInserted(pos)) {
1326                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1327                         } else if (pars_[pit].isDeleted(pos)) {
1328                                 if (pit + 1 == int(pars_.size())) {
1329                                         // we cannot remove a par break at the end of the last paragraph;
1330                                         // instead, we mark it unchanged
1331                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1332                                 } else {
1333                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1334                                         --endPit;
1335                                         --pit;
1336                                 }
1337                         }
1338                 } else {
1339                         if (pars_[pit].isDeleted(pos)) {
1340                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1341                         } else if (pars_[pit].isInserted(pos)) {
1342                                 if (pit + 1 == int(pars_.size())) {
1343                                         // we mark the par break at the end of the last paragraph unchanged
1344                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1345                                 } else {
1346                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1347                                         --endPit;
1348                                         --pit;
1349                                 }
1350                         }
1351                 }
1352         }
1353
1354         // finally, invoke the DEPM
1355
1356         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().trackChanges);
1357
1358         //
1359
1360         cur.finishUndo();
1361         cur.clearSelection();
1362         setCursorIntern(cur, begPit, begPos);
1363         cur.screenUpdateFlags(Update::Force);
1364         cur.forceBufferUpdate();
1365 }
1366
1367
1368 void Text::acceptChanges()
1369 {
1370         BufferParams const & bparams = owner_->buffer().params();
1371         lyx::acceptChanges(pars_, bparams);
1372         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
1373 }
1374
1375
1376 void Text::rejectChanges()
1377 {
1378         BufferParams const & bparams = owner_->buffer().params();
1379         pit_type pars_size = static_cast<pit_type>(pars_.size());
1380
1381         // first, reject changes within each individual paragraph
1382         // (do not consider end-of-par)
1383         for (pit_type pit = 0; pit < pars_size; ++pit) {
1384                 if (!pars_[pit].empty())   // prevent assertion failure
1385                         pars_[pit].rejectChanges(0, pars_[pit].size());
1386         }
1387
1388         // next, reject imaginary end-of-par characters
1389         for (pit_type pit = 0; pit < pars_size; ++pit) {
1390                 pos_type pos = pars_[pit].size();
1391
1392                 if (pars_[pit].isDeleted(pos)) {
1393                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1394                 } else if (pars_[pit].isInserted(pos)) {
1395                         if (pit == pars_size - 1) {
1396                                 // we mark the par break at the end of the last
1397                                 // paragraph unchanged
1398                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1399                         } else {
1400                                 mergeParagraph(bparams, pars_, pit);
1401                                 --pit;
1402                                 --pars_size;
1403                         }
1404                 }
1405         }
1406
1407         // finally, invoke the DEPM
1408         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
1409 }
1410
1411
1412 void Text::deleteWordForward(Cursor & cur)
1413 {
1414         LASSERT(this == cur.text(), /**/);
1415         if (cur.lastpos() == 0)
1416                 cursorForward(cur);
1417         else {
1418                 cur.resetAnchor();
1419                 cur.setSelection(true);
1420                 cursorForwardOneWord(cur);
1421                 cur.setSelection();
1422                 cutSelection(cur, true, false);
1423                 cur.checkBufferStructure();
1424         }
1425 }
1426
1427
1428 void Text::deleteWordBackward(Cursor & cur)
1429 {
1430         LASSERT(this == cur.text(), /**/);
1431         if (cur.lastpos() == 0)
1432                 cursorBackward(cur);
1433         else {
1434                 cur.resetAnchor();
1435                 cur.setSelection(true);
1436                 cursorBackwardOneWord(cur);
1437                 cur.setSelection();
1438                 cutSelection(cur, true, false);
1439                 cur.checkBufferStructure();
1440         }
1441 }
1442
1443
1444 // Kill to end of line.
1445 void Text::changeCase(Cursor & cur, TextCase action)
1446 {
1447         LASSERT(this == cur.text(), /**/);
1448         CursorSlice from;
1449         CursorSlice to;
1450
1451         bool gotsel = false;
1452         if (cur.selection()) {
1453                 from = cur.selBegin();
1454                 to = cur.selEnd();
1455                 gotsel = true;
1456         } else {
1457                 from = cur.top();
1458                 getWord(from, to, PARTIAL_WORD);
1459                 cursorForwardOneWord(cur);
1460         }
1461
1462         cur.recordUndoSelection();
1463
1464         pit_type begPit = from.pit();
1465         pit_type endPit = to.pit();
1466
1467         pos_type begPos = from.pos();
1468         pos_type endPos = to.pos();
1469
1470         pos_type right = 0; // needed after the for loop
1471
1472         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1473                 Paragraph & par = pars_[pit];
1474                 pos_type const pos = (pit == begPit ? begPos : 0);
1475                 right = (pit == endPit ? endPos : par.size());
1476                 par.changeCase(cur.buffer()->params(), pos, right, action);
1477         }
1478
1479         // the selection may have changed due to logically-only deleted chars
1480         if (gotsel) {
1481                 setCursor(cur, begPit, begPos);
1482                 cur.resetAnchor();
1483                 setCursor(cur, endPit, right);
1484                 cur.setSelection();
1485         } else
1486                 setCursor(cur, endPit, right);
1487
1488         cur.checkBufferStructure();
1489 }
1490
1491
1492 bool Text::handleBibitems(Cursor & cur)
1493 {
1494         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
1495                 return false;
1496
1497         if (cur.pos() != 0)
1498                 return false;
1499
1500         BufferParams const & bufparams = cur.buffer()->params();
1501         Paragraph const & par = cur.paragraph();
1502         Cursor prevcur = cur;
1503         if (cur.pit() > 0) {
1504                 --prevcur.pit();
1505                 prevcur.pos() = prevcur.lastpos();
1506         }
1507         Paragraph const & prevpar = prevcur.paragraph();
1508
1509         // if a bibitem is deleted, merge with previous paragraph
1510         // if this is a bibliography item as well
1511         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1512                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1513                 mergeParagraph(bufparams, cur.text()->paragraphs(),
1514                                                         prevcur.pit());
1515                 cur.forceBufferUpdate();
1516                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1517                 cur.screenUpdateFlags(Update::Force);
1518                 return true;
1519         }
1520
1521         // otherwise reset to default
1522         cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
1523         return true;
1524 }
1525
1526
1527 bool Text::erase(Cursor & cur)
1528 {
1529         LASSERT(this == cur.text(), return false);
1530         bool needsUpdate = false;
1531         Paragraph & par = cur.paragraph();
1532
1533         if (cur.pos() != cur.lastpos()) {
1534                 // this is the code for a normal delete, not pasting
1535                 // any paragraphs
1536                 cur.recordUndo(DELETE_UNDO);
1537                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1538                 if(!par.eraseChar(cur.pos(), cur.buffer()->params().trackChanges))
1539                         // the character has been logically deleted only => skip it
1540                         cur.top().forwardPos();
1541
1542                 if (was_inset)
1543                         cur.forceBufferUpdate();
1544                 else
1545                         cur.checkBufferStructure();
1546                 needsUpdate = true;
1547         } else {
1548                 if (cur.pit() == cur.lastpit())
1549                         return dissolveInset(cur);
1550
1551                 if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1552                         par.setChange(cur.pos(), Change(Change::DELETED));
1553                         cur.forwardPos();
1554                         needsUpdate = true;
1555                 } else {
1556                         setCursorIntern(cur, cur.pit() + 1, 0);
1557                         needsUpdate = backspacePos0(cur);
1558                 }
1559         }
1560
1561         needsUpdate |= handleBibitems(cur);
1562
1563         if (needsUpdate) {
1564                 // Make sure the cursor is correct. Is this really needed?
1565                 // No, not really... at least not here!
1566                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1567                 cur.checkBufferStructure();
1568         }
1569
1570         return needsUpdate;
1571 }
1572
1573
1574 bool Text::backspacePos0(Cursor & cur)
1575 {
1576         LASSERT(this == cur.text(), /**/);
1577         if (cur.pit() == 0)
1578                 return false;
1579
1580         bool needsUpdate = false;
1581
1582         BufferParams const & bufparams = cur.buffer()->params();
1583         DocumentClass const & tclass = bufparams.documentClass();
1584         ParagraphList & plist = cur.text()->paragraphs();
1585         Paragraph const & par = cur.paragraph();
1586         Cursor prevcur = cur;
1587         --prevcur.pit();
1588         prevcur.pos() = prevcur.lastpos();
1589         Paragraph const & prevpar = prevcur.paragraph();
1590
1591         // is it an empty paragraph?
1592         if (cur.lastpos() == 0
1593             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1594                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1595                 plist.erase(boost::next(plist.begin(), cur.pit()));
1596                 needsUpdate = true;
1597         }
1598         // is previous par empty?
1599         else if (prevcur.lastpos() == 0
1600                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1601                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1602                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1603                 needsUpdate = true;
1604         }
1605         // Pasting is not allowed, if the paragraphs have different
1606         // layouts. I think it is a real bug of all other
1607         // word processors to allow it. It confuses the user.
1608         // Correction: Pasting is always allowed with standard-layout
1609         // or the empty layout.
1610         else if (par.layout() == prevpar.layout()
1611                  || tclass.isDefaultLayout(par.layout())
1612                  || tclass.isPlainLayout(par.layout())) {
1613                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1614                 mergeParagraph(bufparams, plist, prevcur.pit());
1615                 needsUpdate = true;
1616         }
1617
1618         if (needsUpdate) {
1619                 cur.forceBufferUpdate();
1620                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1621         }
1622
1623         return needsUpdate;
1624 }
1625
1626
1627 bool Text::backspace(Cursor & cur)
1628 {
1629         LASSERT(this == cur.text(), /**/);
1630         bool needsUpdate = false;
1631         if (cur.pos() == 0) {
1632                 if (cur.pit() == 0)
1633                         return dissolveInset(cur);
1634
1635                 Paragraph & prev_par = pars_[cur.pit() - 1];
1636
1637                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1638                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1639                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1640                         return true;
1641                 }
1642                 // The cursor is at the beginning of a paragraph, so
1643                 // the backspace will collapse two paragraphs into one.
1644                 needsUpdate = backspacePos0(cur);
1645
1646         } else {
1647                 // this is the code for a normal backspace, not pasting
1648                 // any paragraphs
1649                 cur.recordUndo(DELETE_UNDO);
1650                 // We used to do cursorBackwardIntern() here, but it is
1651                 // not a good idea since it triggers the auto-delete
1652                 // mechanism. So we do a cursorBackwardIntern()-lite,
1653                 // without the dreaded mechanism. (JMarc)
1654                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1655                                 false, cur.boundary());
1656                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1657                 cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
1658                 if (was_inset)
1659                         cur.forceBufferUpdate();
1660                 else
1661                         cur.checkBufferStructure();
1662         }
1663
1664         if (cur.pos() == cur.lastpos())
1665                 cur.setCurrentFont();
1666
1667         needsUpdate |= handleBibitems(cur);
1668
1669         // A singlePar update is not enough in this case.
1670 //              cur.screenUpdateFlags(Update::Force);
1671         setCursor(cur.top(), cur.pit(), cur.pos());
1672
1673         return needsUpdate;
1674 }
1675
1676
1677 bool Text::dissolveInset(Cursor & cur)
1678 {
1679         LASSERT(this == cur.text(), return false);
1680
1681         if (isMainText() || cur.inset().nargs() != 1)
1682                 return false;
1683
1684         cur.recordUndoInset();
1685         cur.setMark(false);
1686         cur.selHandle(false);
1687         // save position
1688         pos_type spos = cur.pos();
1689         pit_type spit = cur.pit();
1690         ParagraphList plist;
1691         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1692                 plist = paragraphs();
1693         cur.popBackward();
1694         // store cursor offset
1695         if (spit == 0)
1696                 spos += cur.pos();
1697         spit += cur.pit();
1698         Buffer & b = *cur.buffer();
1699         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1700
1701         if (!plist.empty()) {
1702                 // see bug 7319
1703                 // we clear the cache so that we won't get conflicts with labels
1704                 // that get pasted into the buffer. we should update this before
1705                 // its being empty matters. if not (i.e., if we encounter bugs),
1706                 // then this should instead be:
1707                 //        cur.buffer().updateBuffer();
1708                 // but we'll try the cheaper solution here.
1709                 cur.buffer()->clearReferenceCache();
1710
1711                 // ERT paragraphs have the Language latex_language.
1712                 // This is invalid outside of ERT, so we need to
1713                 // change it to the buffer language.
1714                 ParagraphList::iterator it = plist.begin();
1715                 ParagraphList::iterator it_end = plist.end();
1716                 for (; it != it_end; ++it)
1717                         it->changeLanguage(b.params(), latex_language, b.language());
1718
1719                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1720                                    b.errorList("Paste"));
1721                 // restore position
1722                 cur.pit() = min(cur.lastpit(), spit);
1723                 cur.pos() = min(cur.lastpos(), spos);
1724         }
1725
1726         cur.forceBufferUpdate();
1727
1728         // Ensure the current language is set correctly (bug 6292)
1729         cur.text()->setCursor(cur, cur.pit(), cur.pos());
1730         cur.clearSelection();
1731         cur.resetAnchor();
1732         return true;
1733 }
1734
1735
1736 void Text::getWord(CursorSlice & from, CursorSlice & to,
1737         word_location const loc) const
1738 {
1739         to = from;
1740         pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
1741 }
1742
1743
1744 void Text::write(ostream & os) const
1745 {
1746         Buffer const & buf = owner_->buffer();
1747         ParagraphList::const_iterator pit = paragraphs().begin();
1748         ParagraphList::const_iterator end = paragraphs().end();
1749         depth_type dth = 0;
1750         for (; pit != end; ++pit)
1751                 pit->write(os, buf.params(), dth);
1752
1753         // Close begin_deeper
1754         for(; dth > 0; --dth)
1755                 os << "\n\\end_deeper";
1756 }
1757
1758
1759 bool Text::read(Lexer & lex,
1760                 ErrorList & errorList, InsetText * insetPtr)
1761 {
1762         Buffer const & buf = owner_->buffer();
1763         depth_type depth = 0;
1764         bool res = true;
1765
1766         while (lex.isOK()) {
1767                 lex.nextToken();
1768                 string const token = lex.getString();
1769
1770                 if (token.empty())
1771                         continue;
1772
1773                 if (token == "\\end_inset")
1774                         break;
1775
1776                 if (token == "\\end_body")
1777                         continue;
1778
1779                 if (token == "\\begin_body")
1780                         continue;
1781
1782                 if (token == "\\end_document") {
1783                         res = false;
1784                         break;
1785                 }
1786
1787                 if (token == "\\begin_layout") {
1788                         lex.pushToken(token);
1789
1790                         Paragraph par;
1791                         par.setInsetOwner(insetPtr);
1792                         par.params().depth(depth);
1793                         par.setFont(0, Font(inherit_font, buf.params().language));
1794                         pars_.push_back(par);
1795                         readParagraph(pars_.back(), lex, errorList);
1796
1797                         // register the words in the global word list
1798                         pars_.back().updateWords();
1799                 } else if (token == "\\begin_deeper") {
1800                         ++depth;
1801                 } else if (token == "\\end_deeper") {
1802                         if (!depth)
1803                                 lex.printError("\\end_deeper: " "depth is already null");
1804                         else
1805                                 --depth;
1806                 } else {
1807                         LYXERR0("Handling unknown body token: `" << token << '\'');
1808                 }
1809         }
1810
1811         // avoid a crash on weird documents (bug 4859)
1812         if (pars_.empty()) {
1813                 Paragraph par;
1814                 par.setInsetOwner(insetPtr);
1815                 par.params().depth(depth);
1816                 par.setFont(0, Font(inherit_font,
1817                                     buf.params().language));
1818                 par.setPlainOrDefaultLayout(buf.params().documentClass());
1819                 pars_.push_back(par);
1820         }
1821
1822         return res;
1823 }
1824
1825
1826 // Returns the current font and depth as a message.
1827 docstring Text::currentState(Cursor const & cur) const
1828 {
1829         LASSERT(this == cur.text(), /**/);
1830         Buffer & buf = *cur.buffer();
1831         Paragraph const & par = cur.paragraph();
1832         odocstringstream os;
1833
1834         if (buf.params().trackChanges)
1835                 os << _("[Change Tracking] ");
1836
1837         Change change = par.lookupChange(cur.pos());
1838
1839         if (change.changed()) {
1840                 Author const & a = buf.params().authors().get(change.author);
1841                 os << _("Change: ") << a.name();
1842                 if (!a.email().empty())
1843                         os << " (" << a.email() << ")";
1844                 // FIXME ctime is english, we should translate that
1845                 os << _(" at ") << ctime(&change.changetime);
1846                 os << " : ";
1847         }
1848
1849         // I think we should only show changes from the default
1850         // font. (Asger)
1851         // No, from the document font (MV)
1852         Font font = cur.real_current_font;
1853         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1854
1855         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1856
1857         // The paragraph depth
1858         int depth = cur.paragraph().getDepth();
1859         if (depth > 0)
1860                 os << bformat(_(", Depth: %1$d"), depth);
1861
1862         // The paragraph spacing, but only if different from
1863         // buffer spacing.
1864         Spacing const & spacing = par.params().spacing();
1865         if (!spacing.isDefault()) {
1866                 os << _(", Spacing: ");
1867                 switch (spacing.getSpace()) {
1868                 case Spacing::Single:
1869                         os << _("Single");
1870                         break;
1871                 case Spacing::Onehalf:
1872                         os << _("OneHalf");
1873                         break;
1874                 case Spacing::Double:
1875                         os << _("Double");
1876                         break;
1877                 case Spacing::Other:
1878                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1879                         break;
1880                 case Spacing::Default:
1881                         // should never happen, do nothing
1882                         break;
1883                 }
1884         }
1885
1886 #ifdef DEVEL_VERSION
1887         os << _(", Inset: ") << &cur.inset();
1888         os << _(", Paragraph: ") << cur.pit();
1889         os << _(", Id: ") << par.id();
1890         os << _(", Position: ") << cur.pos();
1891         // FIXME: Why is the check for par.size() needed?
1892         // We are called with cur.pos() == par.size() quite often.
1893         if (!par.empty() && cur.pos() < par.size()) {
1894                 // Force output of code point, not character
1895                 size_t const c = par.getChar(cur.pos());
1896                 os << _(", Char: 0x") << hex << c;
1897         }
1898         os << _(", Boundary: ") << cur.boundary();
1899 //      Row & row = cur.textRow();
1900 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1901 #endif
1902         return os.str();
1903 }
1904
1905
1906 docstring Text::getPossibleLabel(Cursor const & cur) const
1907 {
1908         pit_type pit = cur.pit();
1909
1910         Layout const * layout = &(pars_[pit].layout());
1911
1912         docstring text;
1913         docstring par_text = pars_[pit].asString();
1914
1915         // The return string of math matrices might contain linebreaks
1916         par_text = subst(par_text, '\n', '-');
1917         int const numwords = 3;
1918         for (int i = 0; i < numwords; ++i) {
1919                 if (par_text.empty())
1920                         break;
1921                 docstring head;
1922                 par_text = split(par_text, head, ' ');
1923                 // Is it legal to use spaces in labels ?
1924                 if (i > 0)
1925                         text += '-';
1926                 text += head;
1927         }
1928
1929         // Make sure it isn't too long
1930         unsigned int const max_label_length = 32;
1931         if (text.size() > max_label_length)
1932                 text.resize(max_label_length);
1933
1934         // Will contain the label prefix.
1935         docstring name;
1936
1937         // For section, subsection, etc...
1938         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1939                 Layout const * layout2 = &(pars_[pit - 1].layout());
1940                 if (layout2->latextype != LATEX_PARAGRAPH) {
1941                         --pit;
1942                         layout = layout2;
1943                 }
1944         }
1945         if (layout->latextype != LATEX_PARAGRAPH)
1946                 name = layout->refprefix;
1947
1948         // For captions, we just take the caption type
1949         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1950         if (caption_inset) {
1951                 string const & ftype = static_cast<InsetCaption *>(caption_inset)->floattype();
1952                 FloatList const & fl = cur.buffer()->params().documentClass().floats();
1953                 if (fl.typeExist(ftype)) {
1954                         Floating const & flt = fl.getType(ftype);
1955                         name = from_utf8(flt.refPrefix());
1956                 }
1957                 if (name.empty())
1958                         name = from_utf8(ftype.substr(0,3));
1959         }
1960
1961         // If none of the above worked, see if the inset knows.
1962         if (name.empty()) {
1963                 InsetLayout const & il = cur.inset().getLayout();
1964                 name = il.refprefix();
1965         }
1966
1967         if (!name.empty())
1968                 text = name + ':' + text;
1969
1970         // We need a unique label
1971         docstring label = text;
1972         int i = 1;
1973         while (cur.buffer()->insetLabel(label)) {
1974                         label = text + '-' + convert<docstring>(i);
1975                         ++i;
1976                 }
1977
1978         return label;
1979 }
1980
1981
1982 docstring Text::asString(int options) const
1983 {
1984         return asString(0, pars_.size(), options);
1985 }
1986
1987
1988 docstring Text::asString(pit_type beg, pit_type end, int options) const
1989 {
1990         size_t i = size_t(beg);
1991         docstring str = pars_[i].asString(options);
1992         for (++i; i != size_t(end); ++i) {
1993                 str += '\n';
1994                 str += pars_[i].asString(options);
1995         }
1996         return str;
1997 }
1998
1999
2000 void Text::forToc(docstring & os, size_t maxlen, bool shorten) const
2001 {
2002         if (maxlen == 0)
2003                 maxlen = std::numeric_limits<std::size_t>::max();
2004         else
2005                 LASSERT(maxlen >= 8, maxlen = TOC_ENTRY_LENGTH);
2006         for (size_t i = 0; i != pars_.size() && os.length() < maxlen; ++i)
2007                 pars_[i].forToc(os, maxlen);
2008         if (shorten && os.length() >= maxlen)
2009                 os = os.substr(0, maxlen - 3) + from_ascii("...");
2010 }
2011
2012
2013 void Text::charsTranspose(Cursor & cur)
2014 {
2015         LASSERT(this == cur.text(), /**/);
2016
2017         pos_type pos = cur.pos();
2018
2019         // If cursor is at beginning or end of paragraph, do nothing.
2020         if (pos == cur.lastpos() || pos == 0)
2021                 return;
2022
2023         Paragraph & par = cur.paragraph();
2024
2025         // Get the positions of the characters to be transposed.
2026         pos_type pos1 = pos - 1;
2027         pos_type pos2 = pos;
2028
2029         // In change tracking mode, ignore deleted characters.
2030         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
2031                 ++pos2;
2032         if (pos2 == cur.lastpos())
2033                 return;
2034
2035         while (pos1 >= 0 && par.isDeleted(pos1))
2036                 --pos1;
2037         if (pos1 < 0)
2038                 return;
2039
2040         // Don't do anything if one of the "characters" is not regular text.
2041         if (par.isInset(pos1) || par.isInset(pos2))
2042                 return;
2043
2044         // Store the characters to be transposed (including font information).
2045         char_type const char1 = par.getChar(pos1);
2046         Font const font1 =
2047                 par.getFontSettings(cur.buffer()->params(), pos1);
2048
2049         char_type const char2 = par.getChar(pos2);
2050         Font const font2 =
2051                 par.getFontSettings(cur.buffer()->params(), pos2);
2052
2053         // And finally, we are ready to perform the transposition.
2054         // Track the changes if Change Tracking is enabled.
2055         bool const trackChanges = cur.buffer()->params().trackChanges;
2056
2057         cur.recordUndo();
2058
2059         par.eraseChar(pos2, trackChanges);
2060         par.eraseChar(pos1, trackChanges);
2061         par.insertChar(pos1, char2, font2, trackChanges);
2062         par.insertChar(pos2, char1, font1, trackChanges);
2063
2064         cur.checkBufferStructure();
2065
2066         // After the transposition, move cursor to after the transposition.
2067         setCursor(cur, cur.pit(), pos2);
2068         cur.forwardPos();
2069 }
2070
2071
2072 DocIterator Text::macrocontextPosition() const
2073 {
2074         return macrocontext_position_;
2075 }
2076
2077
2078 void Text::setMacrocontextPosition(DocIterator const & pos)
2079 {
2080         macrocontext_position_ = pos;
2081 }
2082
2083
2084 docstring Text::previousWord(CursorSlice const & sl) const
2085 {
2086         CursorSlice from = sl;
2087         CursorSlice to = sl;
2088         getWord(from, to, PREVIOUS_WORD);
2089         if (sl == from || to == from)
2090                 return docstring();
2091
2092         Paragraph const & par = sl.paragraph();
2093         return par.asString(from.pos(), to.pos());
2094 }
2095
2096
2097 bool Text::completionSupported(Cursor const & cur) const
2098 {
2099         Paragraph const & par = cur.paragraph();
2100         return cur.pos() > 0
2101                 && (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
2102                 && !par.isWordSeparator(cur.pos() - 1);
2103 }
2104
2105
2106 CompletionList const * Text::createCompletionList(Cursor const & cur) const
2107 {
2108         WordList const * list = theWordList(*cur.getFont().language());
2109         return new TextCompletionList(cur, list);
2110 }
2111
2112
2113 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
2114 {
2115         LASSERT(cur.bv().cursor() == cur, /**/);
2116         cur.insert(s);
2117         cur.bv().cursor() = cur;
2118         if (!(cur.result().screenUpdate() & Update::Force))
2119                 cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
2120         return true;
2121 }
2122
2123
2124 docstring Text::completionPrefix(Cursor const & cur) const
2125 {
2126         return previousWord(cur.top());
2127 }
2128
2129 } // namespace lyx