src/Text.cpp

   1 /**
   2  * \file src/Text.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Dov Feldstern
   9  * \author Jean-Marc Lasgouttes
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Stefan Schimanski
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "Text.h"
  22
  23 #include "Author.h"
  24 #include "Buffer.h"
  25 #include "buffer_funcs.h"
  26 #include "BufferParams.h"
  27 #include "BufferView.h"
  28 #include "Changes.h"
  29 #include "CompletionList.h"
  30 #include "Cursor.h"
  31 #include "CutAndPaste.h"
  32 #include "DispatchResult.h"
  33 #include "Encoding.h"
  34 #include "ErrorList.h"
  35 #include "FuncRequest.h"
  36 #include "factory.h"
  37 #include "InsetList.h"
  38 #include "Language.h"
  39 #include "Layout.h"
  40 #include "Length.h"
  41 #include "Lexer.h"
  42 #include "lyxfind.h"
  43 #include "LyXRC.h"
  44 #include "Paragraph.h"
  45 #include "ParagraphParameters.h"
  46 #include "ParIterator.h"
  47 #include "TextClass.h"
  48 #include "TextMetrics.h"
  49 #include "VSpace.h"
  50 #include "WordLangTuple.h"
  51 #include "WordList.h"
  52
  53 #include "insets/InsetText.h"
  54 #include "insets/InsetBibitem.h"
  55 #include "insets/InsetCaption.h"
  56 #include "insets/InsetLine.h"
  57 #include "insets/InsetNewline.h"
  58 #include "insets/InsetNewpage.h"
  59 #include "insets/InsetOptArg.h"
  60 #include "insets/InsetSpace.h"
  61 #include "insets/InsetSpecialChar.h"
  62 #include "insets/InsetTabular.h"
  63
  64 #include "support/debug.h"
  65 #include "support/docstream.h"
  66 #include "support/gettext.h"
  67 #include "support/lassert.h"
  68 #include "support/lstrings.h"
  69 #include "support/textutils.h"
  70
  71 #include <boost/next_prior.hpp>
  72
  73 #include <sstream>
  74
  75 using namespace std;
  76 using namespace lyx::support;
  77
  78 namespace lyx {
  79
  80 using cap::cutSelection;
  81 using cap::pasteParagraphList;
  82
  83 static bool moveItem(Paragraph & fromPar, pos_type fromPos,
  84         Paragraph & toPar, pos_type toPos, BufferParams const & params)
  85 {
  86         // Note: moveItem() does not honour change tracking!
  87         // Therefore, it should only be used for breaking and merging paragraphs
  88
  89         // We need a copy here because the character at fromPos is going to be erased.
  90         Font const tmpFont = fromPar.getFontSettings(params, fromPos);
  91         Change const tmpChange = fromPar.lookupChange(fromPos);
  92
  93         if (Inset * tmpInset = fromPar.getInset(fromPos)) {
  94                 fromPar.releaseInset(fromPos);
  95                 // The inset is not in fromPar any more.
  96                 if (!toPar.insertInset(toPos, tmpInset, tmpFont, tmpChange)) {
  97                         delete tmpInset;
  98                         return false;
  99                 }
 100                 return true;
 101         }
 102
 103         char_type const tmpChar = fromPar.getChar(fromPos);
 104         fromPar.eraseChar(fromPos, false);
 105         toPar.insertChar(toPos, tmpChar, tmpFont, tmpChange);
 106         return true;
 107 }
 108
 109
 110 void breakParagraphConservative(BufferParams const & bparams,
 111         ParagraphList & pars, pit_type par_offset, pos_type pos)
 112 {
 113         // create a new paragraph
 114         Paragraph & tmp = *pars.insert(boost::next(pars.begin(), par_offset + 1),
 115                                        Paragraph());
 116         Paragraph & par = pars[par_offset];
 117
 118         tmp.setInsetOwner(&par.inInset());
 119         tmp.makeSameLayout(par);
 120
 121         LASSERT(pos <= par.size(), /**/);
 122
 123         if (pos < par.size()) {
 124                 // move everything behind the break position to the new paragraph
 125                 pos_type pos_end = par.size() - 1;
 126
 127                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 128                         if (moveItem(par, pos, tmp, j, bparams)) {
 129                                 ++j;
 130                         }
 131                 }
 132                 // Move over the end-of-par change information
 133                 tmp.setChange(tmp.size(), par.lookupChange(par.size()));
 134                 par.setChange(par.size(), Change(bparams.trackChanges ?
 135                                            Change::INSERTED : Change::UNCHANGED));
 136         }
 137 }
 138
 139
 140 void mergeParagraph(BufferParams const & bparams,
 141         ParagraphList & pars, pit_type par_offset)
 142 {
 143         Paragraph & next = pars[par_offset + 1];
 144         Paragraph & par = pars[par_offset];
 145
 146         pos_type pos_end = next.size() - 1;
 147         pos_type pos_insert = par.size();
 148
 149         // the imaginary end-of-paragraph character (at par.size()) has to be
 150         // marked as unmodified. Otherwise, its change is adopted by the first
 151         // character of the next paragraph.
 152         if (par.isChanged(par.size())) {
 153                 LYXERR(Debug::CHANGES,
 154                    "merging par with inserted/deleted end-of-par character");
 155                 par.setChange(par.size(), Change(Change::UNCHANGED));
 156         }
 157
 158         Change change = next.lookupChange(next.size());
 159
 160         // move the content of the second paragraph to the end of the first one
 161         for (pos_type i = 0, j = pos_insert; i <= pos_end; ++i) {
 162                 if (moveItem(next, 0, par, j, bparams)) {
 163                         ++j;
 164                 }
 165         }
 166
 167         // move the change of the end-of-paragraph character
 168         par.setChange(par.size(), change);
 169
 170         pars.erase(boost::next(pars.begin(), par_offset + 1));
 171 }
 172
 173
 174 pit_type depthHook(pit_type pit, ParagraphList const & pars, depth_type depth)
 175 {
 176         pit_type newpit = pit;
 177
 178         if (newpit != 0)
 179                 --newpit;
 180
 181         while (newpit != 0 && pars[newpit].getDepth() > depth)
 182                 --newpit;
 183
 184         if (pars[newpit].getDepth() > depth)
 185                 return pit;
 186
 187         return newpit;
 188 }
 189
 190
 191 pit_type outerHook(pit_type par_offset, ParagraphList const & pars)
 192 {
 193         Paragraph const & par = pars[par_offset];
 194
 195         if (par.getDepth() == 0)
 196                 return pars.size();
 197         return depthHook(par_offset, pars, depth_type(par.getDepth() - 1));
 198 }
 199
 200
 201 bool isFirstInSequence(pit_type par_offset, ParagraphList const & pars)
 202 {
 203         Paragraph const & par = pars[par_offset];
 204
 205         pit_type dhook_offset = depthHook(par_offset, pars, par.getDepth());
 206
 207         if (dhook_offset == par_offset)
 208                 return true;
 209
 210         Paragraph const & dhook = pars[dhook_offset];
 211
 212         return dhook.layout() != par.layout()
 213                 || dhook.getDepth() != par.getDepth();
 214 }
 215
 216
 217 int getEndLabel(pit_type p, ParagraphList const & pars)
 218 {
 219         pit_type pit = p;
 220         depth_type par_depth = pars[p].getDepth();
 221         while (pit != pit_type(pars.size())) {
 222                 Layout const & layout = pars[pit].layout();
 223                 int const endlabeltype = layout.endlabeltype;
 224
 225                 if (endlabeltype != END_LABEL_NO_LABEL) {
 226                         if (p + 1 == pit_type(pars.size()))
 227                                 return endlabeltype;
 228
 229                         depth_type const next_depth =
 230                                 pars[p + 1].getDepth();
 231                         if (par_depth > next_depth ||
 232                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 233                                 return endlabeltype;
 234                         break;
 235                 }
 236                 if (par_depth == 0)
 237                         break;
 238                 pit = outerHook(pit, pars);
 239                 if (pit != pit_type(pars.size()))
 240                         par_depth = pars[pit].getDepth();
 241         }
 242         return END_LABEL_NO_LABEL;
 243 }
 244
 245
 246 Font const outerFont(pit_type par_offset, ParagraphList const & pars)
 247 {
 248         depth_type par_depth = pars[par_offset].getDepth();
 249         FontInfo tmpfont = inherit_font;
 250
 251         // Resolve against environment font information
 252         while (par_offset != pit_type(pars.size())
 253                && par_depth
 254                && !tmpfont.resolved()) {
 255                 par_offset = outerHook(par_offset, pars);
 256                 if (par_offset != pit_type(pars.size())) {
 257                         tmpfont.realize(pars[par_offset].layout().font);
 258                         par_depth = pars[par_offset].getDepth();
 259                 }
 260         }
 261
 262         return Font(tmpfont);
 263 }
 264
 265
 266 void acceptChanges(ParagraphList & pars, BufferParams const & bparams)
 267 {
 268         pit_type pars_size = static_cast<pit_type>(pars.size());
 269
 270         // first, accept changes within each individual paragraph
 271         // (do not consider end-of-par)
 272         for (pit_type pit = 0; pit < pars_size; ++pit) {
 273                 if (!pars[pit].empty())   // prevent assertion failure
 274                         pars[pit].acceptChanges(0, pars[pit].size());
 275         }
 276
 277         // next, accept imaginary end-of-par characters
 278         for (pit_type pit = 0; pit < pars_size; ++pit) {
 279                 pos_type pos = pars[pit].size();
 280
 281                 if (pars[pit].isInserted(pos)) {
 282                         pars[pit].setChange(pos, Change(Change::UNCHANGED));
 283                 } else if (pars[pit].isDeleted(pos)) {
 284                         if (pit == pars_size - 1) {
 285                                 // we cannot remove a par break at the end of the last
 286                                 // paragraph; instead, we mark it unchanged
 287                                 pars[pit].setChange(pos, Change(Change::UNCHANGED));
 288                         } else {
 289                                 mergeParagraph(bparams, pars, pit);
 290                                 --pit;
 291                                 --pars_size;
 292                         }
 293                 }
 294         }
 295 }
 296
 297 InsetText const & Text::inset() const
 298 {
 299         return *owner_;
 300 }
 301
 302
 303 void Text::readParToken(Paragraph & par, Lexer & lex,
 304         string const & token, Font & font, Change & change, ErrorList & errorList)
 305 {
 306         Buffer const & buf = owner_->buffer();
 307         BufferParams const & bp = buf.params();
 308
 309         if (token[0] != '\\') {
 310                 docstring dstr = lex.getDocString();
 311                 par.appendString(dstr, font, change);
 312
 313         } else if (token == "\\begin_layout") {
 314                 lex.eatLine();
 315                 docstring layoutname = lex.getDocString();
 316
 317                 font = Font(inherit_font, bp.language);
 318                 change = Change(Change::UNCHANGED);
 319
 320                 DocumentClass const & tclass = bp.documentClass();
 321
 322                 if (layoutname.empty())
 323                         layoutname = tclass.defaultLayoutName();
 324
 325                 if (owner_->forcePlainLayout()) {
 326                         // in this case only the empty layout is allowed
 327                         layoutname = tclass.plainLayoutName();
 328                 } else if (par.usePlainLayout()) {
 329                         // in this case, default layout maps to empty layout
 330                         if (layoutname == tclass.defaultLayoutName())
 331                                 layoutname = tclass.plainLayoutName();
 332                 } else {
 333                         // otherwise, the empty layout maps to the default
 334                         if (layoutname == tclass.plainLayoutName())
 335                                 layoutname = tclass.defaultLayoutName();
 336                 }
 337
 338                 // When we apply an unknown layout to a document, we add this layout to the textclass
 339                 // of this document. For example, when you apply class article to a beamer document,
 340                 // all unknown layouts such as frame will be added to document class article so that
 341                 // these layouts can keep their original names.
 342                 tclass.addLayoutIfNeeded(layoutname);
 343
 344                 par.setLayout(bp.documentClass()[layoutname]);
 345
 346                 // Test whether the layout is obsolete.
 347                 Layout const & layout = par.layout();
 348                 if (!layout.obsoleted_by().empty())
 349                         par.setLayout(bp.documentClass()[layout.obsoleted_by()]);
 350
 351                 par.params().read(lex);
 352
 353         } else if (token == "\\end_layout") {
 354                 LYXERR0("Solitary \\end_layout in line " << lex.lineNumber() << "\n"
 355                        << "Missing \\begin_layout ?");
 356         } else if (token == "\\end_inset") {
 357                 LYXERR0("Solitary \\end_inset in line " << lex.lineNumber() << "\n"
 358                        << "Missing \\begin_inset ?");
 359         } else if (token == "\\begin_inset") {
 360                 Inset * inset = readInset(lex, buf);
 361                 if (inset)
 362                         par.insertInset(par.size(), inset, font, change);
 363                 else {
 364                         lex.eatLine();
 365                         docstring line = lex.getDocString();
 366                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 367                                             par.id(), 0, par.size()));
 368                 }
 369         } else if (token == "\\family") {
 370                 lex.next();
 371                 setLyXFamily(lex.getString(), font.fontInfo());
 372         } else if (token == "\\series") {
 373                 lex.next();
 374                 setLyXSeries(lex.getString(), font.fontInfo());
 375         } else if (token == "\\shape") {
 376                 lex.next();
 377                 setLyXShape(lex.getString(), font.fontInfo());
 378         } else if (token == "\\size") {
 379                 lex.next();
 380                 setLyXSize(lex.getString(), font.fontInfo());
 381         } else if (token == "\\lang") {
 382                 lex.next();
 383                 string const tok = lex.getString();
 384                 Language const * lang = languages.getLanguage(tok);
 385                 if (lang) {
 386                         font.setLanguage(lang);
 387                 } else {
 388                         font.setLanguage(bp.language);
 389                         lex.printError("Unknown language `$$Token'");
 390                 }
 391         } else if (token == "\\numeric") {
 392                 lex.next();
 393                 font.fontInfo().setNumber(font.setLyXMisc(lex.getString()));
 394         } else if (token == "\\emph") {
 395                 lex.next();
 396                 font.fontInfo().setEmph(font.setLyXMisc(lex.getString()));
 397         } else if (token == "\\bar") {
 398                 lex.next();
 399                 string const tok = lex.getString();
 400
 401                 if (tok == "under")
 402                         font.fontInfo().setUnderbar(FONT_ON);
 403                 else if (tok == "no")
 404                         font.fontInfo().setUnderbar(FONT_OFF);
 405                 else if (tok == "default")
 406                         font.fontInfo().setUnderbar(FONT_INHERIT);
 407                 else
 408                         lex.printError("Unknown bar font flag "
 409                                        "`$$Token'");
 410         } else if (token == "\\strikeout") {
 411                 lex.next();
 412                 font.fontInfo().setStrikeout(font.setLyXMisc(lex.getString()));
 413         } else if (token == "\\uuline") {
 414                 lex.next();
 415                 font.fontInfo().setUuline(font.setLyXMisc(lex.getString()));
 416         } else if (token == "\\uwave") {
 417                 lex.next();
 418                 font.fontInfo().setUwave(font.setLyXMisc(lex.getString()));
 419         } else if (token == "\\noun") {
 420                 lex.next();
 421                 font.fontInfo().setNoun(font.setLyXMisc(lex.getString()));
 422         } else if (token == "\\color") {
 423                 lex.next();
 424                 setLyXColor(lex.getString(), font.fontInfo());
 425         } else if (token == "\\SpecialChar") {
 426                         auto_ptr<Inset> inset;
 427                         inset.reset(new InsetSpecialChar);
 428                         inset->read(lex);
 429                         par.insertInset(par.size(), inset.release(),
 430                                         font, change);
 431         } else if (token == "\\backslash") {
 432                 par.appendChar('\\', font, change);
 433         } else if (token == "\\LyXTable") {
 434                 auto_ptr<Inset> inset(new InsetTabular(const_cast<Buffer &>(buf)));
 435                 inset->read(lex);
 436                 par.insertInset(par.size(), inset.release(), font, change);
 437         } else if (token == "\\lyxline") {
 438                 par.insertInset(par.size(), new InsetLine, font, change);
 439         } else if (token == "\\change_unchanged") {
 440                 change = Change(Change::UNCHANGED);
 441         } else if (token == "\\change_inserted" || token == "\\change_deleted") {
 442                 lex.eatLine();
 443                 istringstream is(lex.getString());
 444                 unsigned int aid;
 445                 time_t ct;
 446                 is >> aid >> ct;
 447                 map<unsigned int, int> const & am = bp.author_map;
 448                 if (am.find(aid) == am.end()) {
 449                         errorList.push_back(ErrorItem(_("Change tracking error"),
 450                                             bformat(_("Unknown author index for change: %1$d\n"), aid),
 451                                             par.id(), 0, par.size()));
 452                         change = Change(Change::UNCHANGED);
 453                 } else {
 454                         if (token == "\\change_inserted")
 455                                 change = Change(Change::INSERTED, am.find(aid)->second, ct);
 456                         else
 457                                 change = Change(Change::DELETED, am.find(aid)->second, ct);
 458                 }
 459         } else {
 460                 lex.eatLine();
 461                 errorList.push_back(ErrorItem(_("Unknown token"),
 462                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 463                         lex.getDocString()),
 464                         par.id(), 0, par.size()));
 465         }
 466 }
 467
 468
 469 void Text::readParagraph(Paragraph & par, Lexer & lex,
 470         ErrorList & errorList)
 471 {
 472         lex.nextToken();
 473         string token = lex.getString();
 474         Font font;
 475         Change change(Change::UNCHANGED);
 476
 477         while (lex.isOK()) {
 478                 readParToken(par, lex, token, font, change, errorList);
 479
 480                 lex.nextToken();
 481                 token = lex.getString();
 482
 483                 if (token.empty())
 484                         continue;
 485
 486                 if (token == "\\end_layout") {
 487                         //Ok, paragraph finished
 488                         break;
 489                 }
 490
 491                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 492                 if (token == "\\begin_layout" || token == "\\end_document"
 493                     || token == "\\end_inset" || token == "\\begin_deeper"
 494                     || token == "\\end_deeper") {
 495                         lex.pushToken(token);
 496                         lyxerr << "Paragraph ended in line "
 497                                << lex.lineNumber() << "\n"
 498                                << "Missing \\end_layout.\n";
 499                         break;
 500                 }
 501         }
 502         // Final change goes to paragraph break:
 503         par.setChange(par.size(), change);
 504
 505         // Initialize begin_of_body_ on load; redoParagraph maintains
 506         par.setBeginOfBody();
 507 }
 508
 509
 510 class TextCompletionList : public CompletionList
 511 {
 512 public:
 513         ///
 514         TextCompletionList(Cursor const & cur)
 515                 : buffer_(cur.buffer()), pos_(0)
 516         {}
 517         ///
 518         virtual ~TextCompletionList() {}
 519
 520         ///
 521         virtual bool sorted() const { return true; }
 522         ///
 523         virtual size_t size() const
 524         {
 525                 return theWordList().size();
 526         }
 527         ///
 528         virtual docstring const & data(size_t idx) const
 529         {
 530                 return theWordList().word(idx);
 531         }
 532
 533 private:
 534         ///
 535         Buffer const * buffer_;
 536         ///
 537         size_t pos_;
 538 };
 539
 540
 541 bool Text::empty() const
 542 {
 543         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 544                 // FIXME: Should we consider the labeled type as empty too?
 545                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 546 }
 547
 548
 549 double Text::spacing(Paragraph const & par) const
 550 {
 551         if (par.params().spacing().isDefault())
 552                 return owner_->buffer().params().spacing().getValue();
 553         return par.params().spacing().getValue();
 554 }
 555
 556
 557 /**
 558  * This breaks a paragraph at the specified position.
 559  * The new paragraph will:
 560  * - Decrease depth by one (or change layout to default layout) when
 561  *    keep_layout == false
 562  * - keep current depth and layout when keep_layout == true
 563  */
 564 static void breakParagraph(BufferParams const & bparams,
 565                     ParagraphList & pars, pit_type par_offset, pos_type pos,
 566                     bool keep_layout)
 567 {
 568         // create a new paragraph, and insert into the list
 569         ParagraphList::iterator tmp =
 570                 pars.insert(boost::next(pars.begin(), par_offset + 1),
 571                             Paragraph());
 572
 573         Paragraph & par = pars[par_offset];
 574
 575         // remember to set the inset_owner
 576         tmp->setInsetOwner(&par.inInset());
 577         // without doing that we get a crash when typing <Return> at the
 578         // end of a paragraph
 579         tmp->setPlainOrDefaultLayout(bparams.documentClass());
 580
 581         // layout stays the same with latex-environments
 582         if (keep_layout) {
 583                 tmp->setLayout(par.layout());
 584                 tmp->setLabelWidthString(par.params().labelWidthString());
 585                 tmp->params().depth(par.params().depth());
 586         } else if (par.params().depth() > 0) {
 587                 Paragraph const & hook = pars[outerHook(par_offset, pars)];
 588                 tmp->setLayout(hook.layout());
 589                 // not sure the line below is useful
 590                 tmp->setLabelWidthString(par.params().labelWidthString());
 591                 tmp->params().depth(hook.params().depth());
 592         }
 593
 594         bool const isempty = (par.allowEmpty() && par.empty());
 595
 596         if (!isempty && (par.size() > pos || par.empty())) {
 597                 tmp->setLayout(par.layout());
 598                 tmp->params().align(par.params().align());
 599                 tmp->setLabelWidthString(par.params().labelWidthString());
 600
 601                 tmp->params().depth(par.params().depth());
 602                 tmp->params().noindent(par.params().noindent());
 603
 604                 // move everything behind the break position
 605                 // to the new paragraph
 606
 607                 /* Note: if !keepempty, empty() == true, then we reach
 608                  * here with size() == 0. So pos_end becomes - 1. This
 609                  * doesn't cause problems because both loops below
 610                  * enforce pos <= pos_end and 0 <= pos
 611                  */
 612                 pos_type pos_end = par.size() - 1;
 613
 614                 for (pos_type i = pos, j = 0; i <= pos_end; ++i) {
 615                         if (moveItem(par, pos, *tmp, j, bparams)) {
 616                                 ++j;
 617                         }
 618                 }
 619         }
 620
 621         // Move over the end-of-par change information
 622         tmp->setChange(tmp->size(), par.lookupChange(par.size()));
 623         par.setChange(par.size(), Change(bparams.trackChanges ?
 624                                            Change::INSERTED : Change::UNCHANGED));
 625
 626         if (pos) {
 627                 // Make sure that we keep the language when
 628                 // breaking paragraph.
 629                 if (tmp->empty()) {
 630                         Font changed = tmp->getFirstFontSettings(bparams);
 631                         Font const & old = par.getFontSettings(bparams, par.size());
 632                         changed.setLanguage(old.language());
 633                         tmp->setFont(0, changed);
 634                 }
 635
 636                 return;
 637         }
 638
 639         if (!isempty) {
 640                 bool const soa = par.params().startOfAppendix();
 641                 par.params().clear();
 642                 // do not lose start of appendix marker (bug 4212)
 643                 par.params().startOfAppendix(soa);
 644                 par.setPlainOrDefaultLayout(bparams.documentClass());
 645         }
 646
 647         // layout stays the same with latex-environments
 648         if (keep_layout) {
 649                 par.setLayout(tmp->layout());
 650                 par.setLabelWidthString(tmp->params().labelWidthString());
 651                 par.params().depth(tmp->params().depth());
 652         }
 653 }
 654
 655
 656 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 657 {
 658         LASSERT(this == cur.text(), /**/);
 659
 660         Paragraph & cpar = cur.paragraph();
 661         pit_type cpit = cur.pit();
 662
 663         DocumentClass const & tclass = cur.buffer()->params().documentClass();
 664         Layout const & layout = cpar.layout();
 665
 666         // this is only allowed, if the current paragraph is not empty
 667         // or caption and if it has not the keepempty flag active
 668         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 669             layout.labeltype != LABEL_SENSITIVE)
 670                 return;
 671
 672         // a layout change may affect also the following paragraph
 673         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 674
 675         // Always break behind a space
 676         // It is better to erase the space (Dekel)
 677         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 678                 cpar.eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
 679
 680         // What should the layout for the new paragraph be?
 681         bool keep_layout = inverse_logic ?
 682                 !layout.isEnvironment()
 683                 : layout.isEnvironment();
 684
 685         // We need to remember this before we break the paragraph, because
 686         // that invalidates the layout variable
 687         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 688
 689         // we need to set this before we insert the paragraph.
 690         bool const isempty = cpar.allowEmpty() && cpar.empty();
 691
 692         lyx::breakParagraph(cur.buffer()->params(), paragraphs(), cpit,
 693                          cur.pos(), keep_layout);
 694
 695         // After this, neither paragraph contains any rows!
 696
 697         cpit = cur.pit();
 698         pit_type next_par = cpit + 1;
 699
 700         // well this is the caption hack since one caption is really enough
 701         if (sensitive) {
 702                 if (cur.pos() == 0)
 703                         // set to standard-layout
 704                 //FIXME Check if this should be plainLayout() in some cases
 705                         pars_[cpit].applyLayout(tclass.defaultLayout());
 706                 else
 707                         // set to standard-layout
 708                         //FIXME Check if this should be plainLayout() in some cases
 709                         pars_[next_par].applyLayout(tclass.defaultLayout());
 710         }
 711
 712         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 713                 if (!pars_[next_par].eraseChar(0, cur.buffer()->params().trackChanges))
 714                         break; // the character couldn't be deleted physically due to change tracking
 715         }
 716
 717         cur.buffer()->updateLabels();
 718
 719         // A singlePar update is not enough in this case.
 720         cur.updateFlags(Update::Force);
 721
 722         // This check is necessary. Otherwise the new empty paragraph will
 723         // be deleted automatically. And it is more friendly for the user!
 724         if (cur.pos() != 0 || isempty)
 725                 setCursor(cur, cur.pit() + 1, 0);
 726         else
 727                 setCursor(cur, cur.pit(), 0);
 728 }
 729
 730
 731 // needed to insert the selection
 732 void Text::insertStringAsLines(DocIterator const & dit, docstring const & str,
 733                 Font const & font)
 734 {
 735         BufferParams const & bparams = owner_->buffer().params();
 736         pit_type pit = dit.pit();
 737         pos_type pos = dit.pos();
 738
 739         // insert the string, don't insert doublespace
 740         bool space_inserted = true;
 741         for (docstring::const_iterator cit = str.begin();
 742             cit != str.end(); ++cit) {
 743                 Paragraph & par = pars_[pit];
 744                 if (*cit == '\n') {
 745                         if (autoBreakRows_ && (!par.empty() || par.allowEmpty())) {
 746                                 lyx::breakParagraph(bparams, pars_, pit, pos,
 747                                                par.layout().isEnvironment());
 748                                 ++pit;
 749                                 pos = 0;
 750                                 space_inserted = true;
 751                         } else {
 752                                 continue;
 753                         }
 754                         // do not insert consecutive spaces if !free_spacing
 755                 } else if ((*cit == ' ' || *cit == '\t') &&
 756                            space_inserted && !par.isFreeSpacing()) {
 757                         continue;
 758                 } else if (*cit == '\t') {
 759                         if (!par.isFreeSpacing()) {
 760                                 // tabs are like spaces here
 761                                 par.insertChar(pos, ' ', font, bparams.trackChanges);
 762                                 ++pos;
 763                                 space_inserted = true;
 764                         } else {
 765                                 par.insertChar(pos, *cit, font, bparams.trackChanges);
 766                                 ++pos;
 767                                 space_inserted = true;
 768                         }
 769                 } else if (!isPrintable(*cit)) {
 770                         // Ignore unprintables
 771                         continue;
 772                 } else {
 773                         // just insert the character
 774                         par.insertChar(pos, *cit, font, bparams.trackChanges);
 775                         ++pos;
 776                         space_inserted = (*cit == ' ');
 777                 }
 778         }
 779 }
 780
 781
 782 // turn double CR to single CR, others are converted into one
 783 // blank. Then insertStringAsLines is called
 784 void Text::insertStringAsParagraphs(DocIterator const & dit, docstring const & str,
 785                 Font const & font)
 786 {
 787         docstring linestr = str;
 788         bool newline_inserted = false;
 789
 790         for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 791                 if (linestr[i] == '\n') {
 792                         if (newline_inserted) {
 793                                 // we know that \r will be ignored by
 794                                 // insertStringAsLines. Of course, it is a dirty
 795                                 // trick, but it works...
 796                                 linestr[i - 1] = '\r';
 797                                 linestr[i] = '\n';
 798                         } else {
 799                                 linestr[i] = ' ';
 800                                 newline_inserted = true;
 801                         }
 802                 } else if (isPrintable(linestr[i])) {
 803                         newline_inserted = false;
 804                 }
 805         }
 806         insertStringAsLines(dit, linestr, font);
 807 }
 808
 809
 810 // insert a character, moves all the following breaks in the
 811 // same Paragraph one to the right and make a rebreak
 812 void Text::insertChar(Cursor & cur, char_type c)
 813 {
 814         LASSERT(this == cur.text(), /**/);
 815
 816         cur.recordUndo(INSERT_UNDO);
 817
 818         TextMetrics const & tm = cur.bv().textMetrics(this);
 819         Buffer const & buffer = *cur.buffer();
 820         Paragraph & par = cur.paragraph();
 821         // try to remove this
 822         pit_type const pit = cur.pit();
 823
 824         bool const freeSpacing = par.layout().free_spacing ||
 825                 par.isFreeSpacing();
 826
 827         if (lyxrc.auto_number) {
 828                 static docstring const number_operators = from_ascii("+-/*");
 829                 static docstring const number_unary_operators = from_ascii("+-");
 830                 static docstring const number_seperators = from_ascii(".,:");
 831
 832                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 833                         if (!isDigit(c) && !contains(number_operators, c) &&
 834                             !(contains(number_seperators, c) &&
 835                               cur.pos() != 0 &&
 836                               cur.pos() != cur.lastpos() &&
 837                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 838                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 839                            )
 840                                 number(cur); // Set current_font.number to OFF
 841                 } else if (isDigit(c) &&
 842                            cur.real_current_font.isVisibleRightToLeft()) {
 843                         number(cur); // Set current_font.number to ON
 844
 845                         if (cur.pos() != 0) {
 846                                 char_type const c = par.getChar(cur.pos() - 1);
 847                                 if (contains(number_unary_operators, c) &&
 848                                     (cur.pos() == 1
 849                                      || par.isSeparator(cur.pos() - 2)
 850                                      || par.isNewline(cur.pos() - 2))
 851                                   ) {
 852                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 853                                                 tm.font_);
 854                                 } else if (contains(number_seperators, c)
 855                                      && cur.pos() >= 2
 856                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 857                                         setCharFont(pit, cur.pos() - 1, cur.current_font,
 858                                                 tm.font_);
 859                                 }
 860                         }
 861                 }
 862         }
 863
 864         // In Bidi text, we want spaces to be treated in a special way: spaces
 865         // which are between words in different languages should get the
 866         // paragraph's language; otherwise, spaces should keep the language
 867         // they were originally typed in. This is only in effect while typing;
 868         // after the text is already typed in, the user can always go back and
 869         // explicitly set the language of a space as desired. But 99.9% of the
 870         // time, what we're doing here is what the user actually meant.
 871         //
 872         // The following cases are the ones in which the language of the space
 873         // should be changed to match that of the containing paragraph. In the
 874         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 875         // represents a space, pipe (|) represents the cursor position (so the
 876         // character before it is the one just typed in). The different cases
 877         // are depicted logically (not visually), from left to right:
 878         //
 879         // 1. A_a|
 880         // 2. a_A|
 881         //
 882         // Theoretically, there are other situations that we should, perhaps, deal
 883         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 884         // point (to understand why, just try to create this situation...).
 885
 886         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 887                 // get font in front and behind the space in question. But do NOT
 888                 // use getFont(cur.pos()) because the character c is not inserted yet
 889                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 890                 Font const & post_space_font = cur.real_current_font;
 891                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 892                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 893
 894                 if (pre_space_rtl != post_space_rtl) {
 895                         // Set the space's language to match the language of the
 896                         // adjacent character whose direction is the paragraph's
 897                         // direction; don't touch other properties of the font
 898                         Language const * lang =
 899                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 900                                 pre_space_font.language() : post_space_font.language();
 901
 902                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
 903                         space_font.setLanguage(lang);
 904                         par.setFont(cur.pos() - 1, space_font);
 905                 }
 906         }
 907
 908         // Next check, if there will be two blanks together or a blank at
 909         // the beginning of a paragraph.
 910         // I decided to handle blanks like normal characters, the main
 911         // difference are the special checks when calculating the row.fill
 912         // (blank does not count at the end of a row) and the check here
 913
 914         // When the free-spacing option is set for the current layout,
 915         // disable the double-space checking
 916         if (!freeSpacing && isLineSeparatorChar(c)) {
 917                 if (cur.pos() == 0) {
 918                         static bool sent_space_message = false;
 919                         if (!sent_space_message) {
 920                                 cur.message(_("You cannot insert a space at the "
 921                                                            "beginning of a paragraph. Please read the Tutorial."));
 922                                 sent_space_message = true;
 923                         }
 924                         return;
 925                 }
 926                 LASSERT(cur.pos() > 0, /**/);
 927                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 928                     && !par.isDeleted(cur.pos() - 1)) {
 929                         static bool sent_space_message = false;
 930                         if (!sent_space_message) {
 931                                 cur.message(_("You cannot type two spaces this way. "
 932                                                            "Please read the Tutorial."));
 933                                 sent_space_message = true;
 934                         }
 935                         return;
 936                 }
 937         }
 938
 939         par.insertChar(cur.pos(), c, cur.current_font,
 940                 cur.buffer()->params().trackChanges);
 941         cur.checkBufferStructure();
 942
 943 //              cur.updateFlags(Update::Force);
 944         bool boundary = tm.isRTLBoundary(cur.pit(), cur.pos() + 1);
 945         setCursor(cur, cur.pit(), cur.pos() + 1, false, boundary);
 946         charInserted(cur);
 947 }
 948
 949
 950 void Text::charInserted(Cursor & cur)
 951 {
 952         Paragraph & par = cur.paragraph();
 953
 954         // Here we call finishUndo for every 20 characters inserted.
 955         // This is from my experience how emacs does it. (Lgb)
 956         static unsigned int counter;
 957         if (counter < 20) {
 958                 ++counter;
 959         } else {
 960                 cur.finishUndo();
 961                 counter = 0;
 962         }
 963
 964         // register word if a non-letter was entered
 965         if (cur.pos() > 1
 966             && !par.isWordSeparator(cur.pos() - 2)
 967             && par.isWordSeparator(cur.pos() - 1)) {
 968                 // get the word in front of cursor
 969                 LASSERT(this == cur.text(), /**/);
 970                 cur.paragraph().updateWords();
 971         }
 972 }
 973
 974
 975 // the cursor set functions have a special mechanism. When they
 976 // realize, that you left an empty paragraph, they will delete it.
 977
 978 bool Text::cursorForwardOneWord(Cursor & cur)
 979 {
 980         LASSERT(this == cur.text(), /**/);
 981
 982         pos_type const lastpos = cur.lastpos();
 983         pit_type pit = cur.pit();
 984         pos_type pos = cur.pos();
 985         Paragraph const & par = cur.paragraph();
 986
 987         // Paragraph boundary is a word boundary
 988         if (pos == lastpos) {
 989                 if (pit != cur.lastpit())
 990                         return setCursor(cur, pit + 1, 0);
 991                 else
 992                         return false;
 993         }
 994
 995         if (lyxrc.mac_like_word_movement) {
 996                 // Skip through trailing punctuation and spaces.
 997                 while (pos != lastpos && (par.isChar(pos) || par.isSpace(pos)))
 998                         ++pos;
 999
1000                 // Skip over either a non-char inset or a full word
1001                 if (pos != lastpos && par.isWordSeparator(pos))
1002                         ++pos;
1003                 else while (pos != lastpos && !par.isWordSeparator(pos))
1004                              ++pos;
1005         } else {
1006                 LASSERT(pos < lastpos, /**/); // see above
1007                 if (!par.isWordSeparator(pos))
1008                         while (pos != lastpos && !par.isWordSeparator(pos))
1009                                 ++pos;
1010                 else if (par.isChar(pos))
1011                         while (pos != lastpos && par.isChar(pos))
1012                                 ++pos;
1013                 else if (!par.isSpace(pos)) // non-char inset
1014                         ++pos;
1015
1016                 // Skip over white space
1017                 while (pos != lastpos && par.isSpace(pos))
1018                              ++pos;
1019         }
1020
1021         return setCursor(cur, pit, pos);
1022 }
1023
1024
1025 bool Text::cursorBackwardOneWord(Cursor & cur)
1026 {
1027         LASSERT(this == cur.text(), /**/);
1028
1029         pit_type pit = cur.pit();
1030         pos_type pos = cur.pos();
1031         Paragraph & par = cur.paragraph();
1032
1033         // Paragraph boundary is a word boundary
1034         if (pos == 0 && pit != 0)
1035                 return setCursor(cur, pit - 1, getPar(pit - 1).size());
1036
1037         if (lyxrc.mac_like_word_movement) {
1038                 // Skip through punctuation and spaces.
1039                 while (pos != 0 && (par.isChar(pos - 1) || par.isSpace(pos - 1)))
1040                         --pos;
1041
1042                 // Skip over either a non-char inset or a full word
1043                 if (pos != 0 && par.isWordSeparator(pos - 1) && !par.isChar(pos - 1))
1044                         --pos;
1045                 else while (pos != 0 && !par.isWordSeparator(pos - 1))
1046                              --pos;
1047         } else {
1048                 // Skip over white space
1049                 while (pos != 0 && par.isSpace(pos - 1))
1050                              --pos;
1051
1052                 if (pos != 0 && !par.isWordSeparator(pos - 1))
1053                         while (pos != 0 && !par.isWordSeparator(pos - 1))
1054                                 --pos;
1055                 else if (pos != 0 && par.isChar(pos - 1))
1056                         while (pos != 0 && par.isChar(pos - 1))
1057                                 --pos;
1058                 else if (pos != 0 && !par.isSpace(pos - 1)) // non-char inset
1059                         --pos;
1060         }
1061
1062         return setCursor(cur, pit, pos);
1063 }
1064
1065
1066 bool Text::cursorVisLeftOneWord(Cursor & cur)
1067 {
1068         LASSERT(this == cur.text(), /**/);
1069
1070         pos_type left_pos, right_pos;
1071         bool left_is_letter, right_is_letter;
1072
1073         Cursor temp_cur = cur;
1074
1075         // always try to move at least once...
1076         while (temp_cur.posVisLeft(true /* skip_inset */)) {
1077
1078                 // collect some information about current cursor position
1079                 temp_cur.getSurroundingPos(left_pos, right_pos);
1080                 left_is_letter =
1081                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1082                 right_is_letter =
1083                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1084
1085                 // if we're not at a letter/non-letter boundary, continue moving
1086                 if (left_is_letter == right_is_letter)
1087                         continue;
1088
1089                 // we should stop when we have an LTR word on our right or an RTL word
1090                 // on our left
1091                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1092                                 temp_cur.buffer()->params(), left_pos).isRightToLeft())
1093                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1094                                 temp_cur.buffer()->params(), right_pos).isRightToLeft()))
1095                         break;
1096         }
1097
1098         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1099                                          true, temp_cur.boundary());
1100 }
1101
1102
1103 bool Text::cursorVisRightOneWord(Cursor & cur)
1104 {
1105         LASSERT(this == cur.text(), /**/);
1106
1107         pos_type left_pos, right_pos;
1108         bool left_is_letter, right_is_letter;
1109
1110         Cursor temp_cur = cur;
1111
1112         // always try to move at least once...
1113         while (temp_cur.posVisRight(true /* skip_inset */)) {
1114
1115                 // collect some information about current cursor position
1116                 temp_cur.getSurroundingPos(left_pos, right_pos);
1117                 left_is_letter =
1118                         (left_pos > -1 ? !temp_cur.paragraph().isWordSeparator(left_pos) : false);
1119                 right_is_letter =
1120                         (right_pos > -1 ? !temp_cur.paragraph().isWordSeparator(right_pos) : false);
1121
1122                 // if we're not at a letter/non-letter boundary, continue moving
1123                 if (left_is_letter == right_is_letter)
1124                         continue;
1125
1126                 // we should stop when we have an LTR word on our right or an RTL word
1127                 // on our left
1128                 if ((left_is_letter && temp_cur.paragraph().getFontSettings(
1129                                 temp_cur.buffer()->params(),
1130                                 left_pos).isRightToLeft())
1131                         || (right_is_letter && !temp_cur.paragraph().getFontSettings(
1132                                 temp_cur.buffer()->params(),
1133                                 right_pos).isRightToLeft()))
1134                         break;
1135         }
1136
1137         return setCursor(cur, temp_cur.pit(), temp_cur.pos(),
1138                                          true, temp_cur.boundary());
1139 }
1140
1141
1142 void Text::selectWord(Cursor & cur, word_location loc)
1143 {
1144         LASSERT(this == cur.text(), /**/);
1145         CursorSlice from = cur.top();
1146         CursorSlice to = cur.top();
1147         getWord(from, to, loc);
1148         if (cur.top() != from)
1149                 setCursor(cur, from.pit(), from.pos());
1150         if (to == from)
1151                 return;
1152         cur.resetAnchor();
1153         setCursor(cur, to.pit(), to.pos());
1154         cur.setSelection();
1155 }
1156
1157
1158 void Text::selectAll(Cursor & cur)
1159 {
1160         LASSERT(this == cur.text(), /**/);
1161         if (cur.lastpos() == 0 && cur.lastpit() == 0)
1162                 return;
1163         // If the cursor is at the beginning, make sure the cursor ends there
1164         if (cur.pit() == 0 && cur.pos() == 0) {
1165                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1166                 cur.resetAnchor();
1167                 setCursor(cur, 0, 0);
1168         } else {
1169                 setCursor(cur, 0, 0);
1170                 cur.resetAnchor();
1171                 setCursor(cur, cur.lastpit(), getPar(cur.lastpit()).size());
1172         }
1173         cur.setSelection();
1174 }
1175
1176
1177 // Select the word currently under the cursor when no
1178 // selection is currently set
1179 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
1180 {
1181         LASSERT(this == cur.text(), /**/);
1182         if (cur.selection())
1183                 return false;
1184         selectWord(cur, loc);
1185         return cur.selection();
1186 }
1187
1188
1189 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
1190 {
1191         LASSERT(this == cur.text(), /**/);
1192
1193         if (!cur.selection()) {
1194                 bool const changed = cur.paragraph().isChanged(cur.pos());
1195                 if (!(changed && findNextChange(&cur.bv())))
1196                         return;
1197         }
1198
1199         cur.recordUndoSelection();
1200
1201         pit_type begPit = cur.selectionBegin().pit();
1202         pit_type endPit = cur.selectionEnd().pit();
1203
1204         pos_type begPos = cur.selectionBegin().pos();
1205         pos_type endPos = cur.selectionEnd().pos();
1206
1207         // keep selection info, because endPos becomes invalid after the first loop
1208         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
1209
1210         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
1211
1212         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1213                 pos_type parSize = pars_[pit].size();
1214
1215                 // ignore empty paragraphs; otherwise, an assertion will fail for
1216                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
1217                 if (parSize == 0)
1218                         continue;
1219
1220                 // do not consider first paragraph if the cursor starts at pos size()
1221                 if (pit == begPit && begPos == parSize)
1222                         continue;
1223
1224                 // do not consider last paragraph if the cursor ends at pos 0
1225                 if (pit == endPit && endPos == 0)
1226                         break; // last iteration anyway
1227
1228                 pos_type left  = (pit == begPit ? begPos : 0);
1229                 pos_type right = (pit == endPit ? endPos : parSize);
1230
1231                 if (op == ACCEPT) {
1232                         pars_[pit].acceptChanges(left, right);
1233                 } else {
1234                         pars_[pit].rejectChanges(left, right);
1235                 }
1236         }
1237
1238         // next, accept/reject imaginary end-of-par characters
1239
1240         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1241                 pos_type pos = pars_[pit].size();
1242
1243                 // skip if the selection ends before the end-of-par
1244                 if (pit == endPit && endsBeforeEndOfPar)
1245                         break; // last iteration anyway
1246
1247                 // skip if this is not the last paragraph of the document
1248                 // note: the user should be able to accept/reject the par break of the last par!
1249                 if (pit == endPit && pit + 1 != int(pars_.size()))
1250                         break; // last iteration anway
1251
1252                 if (op == ACCEPT) {
1253                         if (pars_[pit].isInserted(pos)) {
1254                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1255                         } else if (pars_[pit].isDeleted(pos)) {
1256                                 if (pit + 1 == int(pars_.size())) {
1257                                         // we cannot remove a par break at the end of the last paragraph;
1258                                         // instead, we mark it unchanged
1259                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1260                                 } else {
1261                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1262                                         --endPit;
1263                                         --pit;
1264                                 }
1265                         }
1266                 } else {
1267                         if (pars_[pit].isDeleted(pos)) {
1268                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1269                         } else if (pars_[pit].isInserted(pos)) {
1270                                 if (pit + 1 == int(pars_.size())) {
1271                                         // we mark the par break at the end of the last paragraph unchanged
1272                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1273                                 } else {
1274                                         mergeParagraph(cur.buffer()->params(), pars_, pit);
1275                                         --endPit;
1276                                         --pit;
1277                                 }
1278                         }
1279                 }
1280         }
1281
1282         // finally, invoke the DEPM
1283
1284         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer()->params().trackChanges);
1285
1286         //
1287
1288         cur.finishUndo();
1289         cur.clearSelection();
1290         setCursorIntern(cur, begPit, begPos);
1291         cur.updateFlags(Update::Force);
1292         cur.buffer()->updateLabels();
1293 }
1294
1295
1296 void Text::acceptChanges()
1297 {
1298         BufferParams const & bparams = owner_->buffer().params();
1299         lyx::acceptChanges(pars_, bparams);
1300         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
1301 }
1302
1303
1304 void Text::rejectChanges()
1305 {
1306         BufferParams const & bparams = owner_->buffer().params();
1307         pit_type pars_size = static_cast<pit_type>(pars_.size());
1308
1309         // first, reject changes within each individual paragraph
1310         // (do not consider end-of-par)
1311         for (pit_type pit = 0; pit < pars_size; ++pit) {
1312                 if (!pars_[pit].empty())   // prevent assertion failure
1313                         pars_[pit].rejectChanges(0, pars_[pit].size());
1314         }
1315
1316         // next, reject imaginary end-of-par characters
1317         for (pit_type pit = 0; pit < pars_size; ++pit) {
1318                 pos_type pos = pars_[pit].size();
1319
1320                 if (pars_[pit].isDeleted(pos)) {
1321                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1322                 } else if (pars_[pit].isInserted(pos)) {
1323                         if (pit == pars_size - 1) {
1324                                 // we mark the par break at the end of the last
1325                                 // paragraph unchanged
1326                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1327                         } else {
1328                                 mergeParagraph(bparams, pars_, pit);
1329                                 --pit;
1330                                 --pars_size;
1331                         }
1332                 }
1333         }
1334
1335         // finally, invoke the DEPM
1336         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
1337 }
1338
1339
1340 void Text::deleteWordForward(Cursor & cur)
1341 {
1342         LASSERT(this == cur.text(), /**/);
1343         if (cur.lastpos() == 0)
1344                 cursorForward(cur);
1345         else {
1346                 cur.resetAnchor();
1347                 cur.setSelection(true);
1348                 cursorForwardOneWord(cur);
1349                 cur.setSelection();
1350                 cutSelection(cur, true, false);
1351                 cur.checkBufferStructure();
1352         }
1353 }
1354
1355
1356 void Text::deleteWordBackward(Cursor & cur)
1357 {
1358         LASSERT(this == cur.text(), /**/);
1359         if (cur.lastpos() == 0)
1360                 cursorBackward(cur);
1361         else {
1362                 cur.resetAnchor();
1363                 cur.setSelection(true);
1364                 cursorBackwardOneWord(cur);
1365                 cur.setSelection();
1366                 cutSelection(cur, true, false);
1367                 cur.checkBufferStructure();
1368         }
1369 }
1370
1371
1372 // Kill to end of line.
1373 void Text::changeCase(Cursor & cur, TextCase action)
1374 {
1375         LASSERT(this == cur.text(), /**/);
1376         CursorSlice from;
1377         CursorSlice to;
1378
1379         bool gotsel = false;
1380         if (cur.selection()) {
1381                 from = cur.selBegin();
1382                 to = cur.selEnd();
1383                 gotsel = true;
1384         } else {
1385                 from = cur.top();
1386                 getWord(from, to, PARTIAL_WORD);
1387                 cursorForwardOneWord(cur);
1388         }
1389
1390         cur.recordUndoSelection();
1391
1392         pit_type begPit = from.pit();
1393         pit_type endPit = to.pit();
1394
1395         pos_type begPos = from.pos();
1396         pos_type endPos = to.pos();
1397
1398         pos_type right = 0; // needed after the for loop
1399
1400         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1401                 Paragraph & par = pars_[pit];
1402                 pos_type const pos = (pit == begPit ? begPos : 0);
1403                 right = (pit == endPit ? endPos : par.size());
1404                 par.changeCase(cur.buffer()->params(), pos, right, action);
1405         }
1406
1407         // the selection may have changed due to logically-only deleted chars
1408         if (gotsel) {
1409                 setCursor(cur, begPit, begPos);
1410                 cur.resetAnchor();
1411                 setCursor(cur, endPit, right);
1412                 cur.setSelection();
1413         } else
1414                 setCursor(cur, endPit, right);
1415
1416         cur.checkBufferStructure();
1417 }
1418
1419
1420 bool Text::handleBibitems(Cursor & cur)
1421 {
1422         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
1423                 return false;
1424
1425         if (cur.pos() != 0)
1426                 return false;
1427
1428         BufferParams const & bufparams = cur.buffer()->params();
1429         Paragraph const & par = cur.paragraph();
1430         Cursor prevcur = cur;
1431         if (cur.pit() > 0) {
1432                 --prevcur.pit();
1433                 prevcur.pos() = prevcur.lastpos();
1434         }
1435         Paragraph const & prevpar = prevcur.paragraph();
1436
1437         // if a bibitem is deleted, merge with previous paragraph
1438         // if this is a bibliography item as well
1439         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1440                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1441                 mergeParagraph(bufparams, cur.text()->paragraphs(),
1442                                                         prevcur.pit());
1443                 cur.buffer()->updateLabels();
1444                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1445                 cur.updateFlags(Update::Force);
1446                 return true;
1447         }
1448
1449         // otherwise reset to default
1450         cur.paragraph().setPlainOrDefaultLayout(bufparams.documentClass());
1451         return true;
1452 }
1453
1454
1455 bool Text::erase(Cursor & cur)
1456 {
1457         LASSERT(this == cur.text(), return false);
1458         bool needsUpdate = false;
1459         Paragraph & par = cur.paragraph();
1460
1461         if (cur.pos() != cur.lastpos()) {
1462                 // this is the code for a normal delete, not pasting
1463                 // any paragraphs
1464                 cur.recordUndo(DELETE_UNDO);
1465                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1466                 if(!par.eraseChar(cur.pos(), cur.buffer()->params().trackChanges))
1467                         // the character has been logically deleted only => skip it
1468                         cur.top().forwardPos();
1469
1470                 if (was_inset)
1471                         cur.buffer()->updateLabels();
1472                 else
1473                         cur.checkBufferStructure();
1474                 needsUpdate = true;
1475         } else {
1476                 if (cur.pit() == cur.lastpit())
1477                         return dissolveInset(cur);
1478
1479                 if (!par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1480                         par.setChange(cur.pos(), Change(Change::DELETED));
1481                         cur.forwardPos();
1482                         needsUpdate = true;
1483                 } else {
1484                         setCursorIntern(cur, cur.pit() + 1, 0);
1485                         needsUpdate = backspacePos0(cur);
1486                 }
1487         }
1488
1489         needsUpdate |= handleBibitems(cur);
1490
1491         if (needsUpdate) {
1492                 // Make sure the cursor is correct. Is this really needed?
1493                 // No, not really... at least not here!
1494                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1495                 cur.checkBufferStructure();
1496         }
1497
1498         return needsUpdate;
1499 }
1500
1501
1502 bool Text::backspacePos0(Cursor & cur)
1503 {
1504         LASSERT(this == cur.text(), /**/);
1505         if (cur.pit() == 0)
1506                 return false;
1507
1508         bool needsUpdate = false;
1509
1510         BufferParams const & bufparams = cur.buffer()->params();
1511         DocumentClass const & tclass = bufparams.documentClass();
1512         ParagraphList & plist = cur.text()->paragraphs();
1513         Paragraph const & par = cur.paragraph();
1514         Cursor prevcur = cur;
1515         --prevcur.pit();
1516         prevcur.pos() = prevcur.lastpos();
1517         Paragraph const & prevpar = prevcur.paragraph();
1518
1519         // is it an empty paragraph?
1520         if (cur.lastpos() == 0
1521             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1522                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1523                 plist.erase(boost::next(plist.begin(), cur.pit()));
1524                 needsUpdate = true;
1525         }
1526         // is previous par empty?
1527         else if (prevcur.lastpos() == 0
1528                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1529                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1530                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1531                 needsUpdate = true;
1532         }
1533         // Pasting is not allowed, if the paragraphs have different
1534         // layouts. I think it is a real bug of all other
1535         // word processors to allow it. It confuses the user.
1536         // Correction: Pasting is always allowed with standard-layout
1537         // or the empty layout.
1538         else if (par.layout() == prevpar.layout()
1539                  || tclass.isDefaultLayout(par.layout())
1540                  || tclass.isPlainLayout(par.layout())) {
1541                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1542                 mergeParagraph(bufparams, plist, prevcur.pit());
1543                 needsUpdate = true;
1544         }
1545
1546         if (needsUpdate) {
1547                 cur.buffer()->updateLabels();
1548                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1549         }
1550
1551         return needsUpdate;
1552 }
1553
1554
1555 bool Text::backspace(Cursor & cur)
1556 {
1557         LASSERT(this == cur.text(), /**/);
1558         bool needsUpdate = false;
1559         if (cur.pos() == 0) {
1560                 if (cur.pit() == 0)
1561                         return dissolveInset(cur);
1562
1563                 Paragraph & prev_par = pars_[cur.pit() - 1];
1564
1565                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer()->params().trackChanges)) {
1566                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1567                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1568                         return true;
1569                 }
1570                 // The cursor is at the beginning of a paragraph, so
1571                 // the backspace will collapse two paragraphs into one.
1572                 needsUpdate = backspacePos0(cur);
1573
1574         } else {
1575                 // this is the code for a normal backspace, not pasting
1576                 // any paragraphs
1577                 cur.recordUndo(DELETE_UNDO);
1578                 // We used to do cursorBackwardIntern() here, but it is
1579                 // not a good idea since it triggers the auto-delete
1580                 // mechanism. So we do a cursorBackwardIntern()-lite,
1581                 // without the dreaded mechanism. (JMarc)
1582                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1583                                 false, cur.boundary());
1584                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1585                 cur.paragraph().eraseChar(cur.pos(), cur.buffer()->params().trackChanges);
1586                 if (was_inset)
1587                         cur.buffer()->updateLabels();
1588                 else
1589                         cur.checkBufferStructure();
1590         }
1591
1592         if (cur.pos() == cur.lastpos())
1593                 cur.setCurrentFont();
1594
1595         needsUpdate |= handleBibitems(cur);
1596
1597         // A singlePar update is not enough in this case.
1598 //              cur.updateFlags(Update::Force);
1599         setCursor(cur.top(), cur.pit(), cur.pos());
1600
1601         return needsUpdate;
1602 }
1603
1604
1605 bool Text::dissolveInset(Cursor & cur)
1606 {
1607         LASSERT(this == cur.text(), return false);
1608
1609         if (isMainText() || cur.inset().nargs() != 1)
1610                 return false;
1611
1612         cur.recordUndoInset();
1613         cur.setMark(false);
1614         cur.selHandle(false);
1615         // save position
1616         pos_type spos = cur.pos();
1617         pit_type spit = cur.pit();
1618         ParagraphList plist;
1619         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1620                 plist = paragraphs();
1621         cur.popBackward();
1622         // store cursor offset
1623         if (spit == 0)
1624                 spos += cur.pos();
1625         spit += cur.pit();
1626         Buffer & b = *cur.buffer();
1627         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1628         if (!plist.empty()) {
1629                 // ERT paragraphs have the Language latex_language.
1630                 // This is invalid outside of ERT, so we need to
1631                 // change it to the buffer language.
1632                 ParagraphList::iterator it = plist.begin();
1633                 ParagraphList::iterator it_end = plist.end();
1634                 for (; it != it_end; it++)
1635                         it->changeLanguage(b.params(), latex_language, b.language());
1636
1637                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1638                                    b.errorList("Paste"));
1639                 // restore position
1640                 cur.pit() = min(cur.lastpit(), spit);
1641                 cur.pos() = min(cur.lastpos(), spos);
1642         } else
1643                 // this is the least that needs to be done (bug 6003)
1644                 // in the above case, pasteParagraphList handles this
1645                 cur.buffer()->updateLabels();
1646         cur.clearSelection();
1647         cur.resetAnchor();
1648         return true;
1649 }
1650
1651
1652 void Text::getWord(CursorSlice & from, CursorSlice & to,
1653         word_location const loc) const
1654 {
1655         to = from;
1656         pars_[to.pit()].locateWord(from.pos(), to.pos(), loc);
1657 }
1658
1659
1660 void Text::write(ostream & os) const
1661 {
1662         Buffer const & buf = owner_->buffer();
1663         ParagraphList::const_iterator pit = paragraphs().begin();
1664         ParagraphList::const_iterator end = paragraphs().end();
1665         depth_type dth = 0;
1666         for (; pit != end; ++pit)
1667                 pit->write(os, buf.params(), dth);
1668
1669         // Close begin_deeper
1670         for(; dth > 0; --dth)
1671                 os << "\n\\end_deeper";
1672 }
1673
1674
1675 bool Text::read(Lexer & lex,
1676                 ErrorList & errorList, InsetText * insetPtr)
1677 {
1678         Buffer const & buf = owner_->buffer();
1679         depth_type depth = 0;
1680         bool res = true;
1681
1682         while (lex.isOK()) {
1683                 lex.nextToken();
1684                 string const token = lex.getString();
1685
1686                 if (token.empty())
1687                         continue;
1688
1689                 if (token == "\\end_inset")
1690                         break;
1691
1692                 if (token == "\\end_body")
1693                         continue;
1694
1695                 if (token == "\\begin_body")
1696                         continue;
1697
1698                 if (token == "\\end_document") {
1699                         res = false;
1700                         break;
1701                 }
1702
1703                 if (token == "\\begin_layout") {
1704                         lex.pushToken(token);
1705
1706                         Paragraph par;
1707                         par.setInsetOwner(insetPtr);
1708                         par.params().depth(depth);
1709                         par.setFont(0, Font(inherit_font, buf.params().language));
1710                         pars_.push_back(par);
1711                         readParagraph(pars_.back(), lex, errorList);
1712
1713                         // register the words in the global word list
1714                         CursorSlice sl = CursorSlice(*insetPtr);
1715                         sl.pit() = pars_.size() - 1;
1716                         pars_.back().updateWords();
1717                 } else if (token == "\\begin_deeper") {
1718                         ++depth;
1719                 } else if (token == "\\end_deeper") {
1720                         if (!depth)
1721                                 lex.printError("\\end_deeper: " "depth is already null");
1722                         else
1723                                 --depth;
1724                 } else {
1725                         LYXERR0("Handling unknown body token: `" << token << '\'');
1726                 }
1727         }
1728
1729         // avoid a crash on weird documents (bug 4859)
1730         if (pars_.empty()) {
1731                 Paragraph par;
1732                 par.setInsetOwner(insetPtr);
1733                 par.params().depth(depth);
1734                 par.setFont(0, Font(inherit_font,
1735                                     buf.params().language));
1736                 par.setPlainOrDefaultLayout(buf.params().documentClass());
1737                 pars_.push_back(par);
1738         }
1739
1740         return res;
1741 }
1742
1743 // Returns the current font and depth as a message.
1744 docstring Text::currentState(Cursor const & cur) const
1745 {
1746         LASSERT(this == cur.text(), /**/);
1747         Buffer & buf = *cur.buffer();
1748         Paragraph const & par = cur.paragraph();
1749         odocstringstream os;
1750
1751         if (buf.params().trackChanges)
1752                 os << _("[Change Tracking] ");
1753
1754         Change change = par.lookupChange(cur.pos());
1755
1756         if (change.changed()) {
1757                 Author const & a = buf.params().authors().get(change.author);
1758                 os << _("Change: ") << a.name();
1759                 if (!a.email().empty())
1760                         os << " (" << a.email() << ")";
1761                 // FIXME ctime is english, we should translate that
1762                 os << _(" at ") << ctime(&change.changetime);
1763                 os << " : ";
1764         }
1765
1766         // I think we should only show changes from the default
1767         // font. (Asger)
1768         // No, from the document font (MV)
1769         Font font = cur.real_current_font;
1770         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1771
1772         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1773
1774         // The paragraph depth
1775         int depth = cur.paragraph().getDepth();
1776         if (depth > 0)
1777                 os << bformat(_(", Depth: %1$d"), depth);
1778
1779         // The paragraph spacing, but only if different from
1780         // buffer spacing.
1781         Spacing const & spacing = par.params().spacing();
1782         if (!spacing.isDefault()) {
1783                 os << _(", Spacing: ");
1784                 switch (spacing.getSpace()) {
1785                 case Spacing::Single:
1786                         os << _("Single");
1787                         break;
1788                 case Spacing::Onehalf:
1789                         os << _("OneHalf");
1790                         break;
1791                 case Spacing::Double:
1792                         os << _("Double");
1793                         break;
1794                 case Spacing::Other:
1795                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1796                         break;
1797                 case Spacing::Default:
1798                         // should never happen, do nothing
1799                         break;
1800                 }
1801         }
1802
1803 #ifdef DEVEL_VERSION
1804         os << _(", Inset: ") << &cur.inset();
1805         os << _(", Paragraph: ") << cur.pit();
1806         os << _(", Id: ") << par.id();
1807         os << _(", Position: ") << cur.pos();
1808         // FIXME: Why is the check for par.size() needed?
1809         // We are called with cur.pos() == par.size() quite often.
1810         if (!par.empty() && cur.pos() < par.size()) {
1811                 // Force output of code point, not character
1812                 size_t const c = par.getChar(cur.pos());
1813                 os << _(", Char: 0x") << hex << c;
1814         }
1815         os << _(", Boundary: ") << cur.boundary();
1816 //      Row & row = cur.textRow();
1817 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1818 #endif
1819         return os.str();
1820 }
1821
1822
1823 docstring Text::getPossibleLabel(Cursor const & cur) const
1824 {
1825         pit_type pit = cur.pit();
1826
1827         Layout const * layout = &(pars_[pit].layout());
1828
1829         docstring text;
1830         docstring par_text = pars_[pit].asString();
1831         string piece;
1832         // the return string of math matrices might contain linebreaks
1833         par_text = subst(par_text, '\n', '-');
1834         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1835                 if (par_text.empty())
1836                         break;
1837                 docstring head;
1838                 par_text = split(par_text, head, ' ');
1839                 // Is it legal to use spaces in labels ?
1840                 if (i > 0)
1841                         text += '-';
1842                 text += head;
1843         }
1844
1845         // No need for a prefix if the user said so.
1846         if (lyxrc.label_init_length <= 0)
1847                 return text;
1848
1849         // Will contain the label type.
1850         docstring name;
1851
1852         // For section, subsection, etc...
1853         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1854                 Layout const * layout2 = &(pars_[pit - 1].layout());
1855                 if (layout2->latextype != LATEX_PARAGRAPH) {
1856                         --pit;
1857                         layout = layout2;
1858                 }
1859         }
1860         if (layout->latextype != LATEX_PARAGRAPH)
1861                 name = from_ascii(layout->latexname());
1862
1863         // for captions, we just take the caption type
1864         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1865         if (caption_inset)
1866                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1867
1868         // If none of the above worked, we'll see if we're inside various
1869         // types of insets and take our abbreviation from them.
1870         if (name.empty()) {
1871                 InsetCode const codes[] = {
1872                         FLOAT_CODE,
1873                         WRAP_CODE,
1874                         FOOT_CODE
1875                 };
1876                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1877                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1878                         if (float_inset) {
1879                                 name = float_inset->name();
1880                                 break;
1881                         }
1882                 }
1883         }
1884
1885         // Create a correct prefix for prettyref
1886         if (name == "theorem")
1887                 name = from_ascii("thm");
1888         else if (name == "Foot")
1889                 name = from_ascii("fn");
1890         else if (name == "listing")
1891                 name = from_ascii("lst");
1892
1893         if (!name.empty())
1894                 text = name.substr(0, 3) + ':' + text;
1895
1896         return text;
1897 }
1898
1899
1900 docstring Text::asString(int options) const
1901 {
1902         return asString(0, pars_.size(), options);
1903 }
1904
1905
1906 docstring Text::asString(pit_type beg, pit_type end, int options) const
1907 {
1908         size_t i = size_t(beg);
1909         docstring str = pars_[i].asString(options);
1910         for (++i; i != size_t(end); ++i) {
1911                 str += '\n';
1912                 str += pars_[i].asString(options);
1913         }
1914         return str;
1915 }
1916
1917
1918
1919 void Text::charsTranspose(Cursor & cur)
1920 {
1921         LASSERT(this == cur.text(), /**/);
1922
1923         pos_type pos = cur.pos();
1924
1925         // If cursor is at beginning or end of paragraph, do nothing.
1926         if (pos == cur.lastpos() || pos == 0)
1927                 return;
1928
1929         Paragraph & par = cur.paragraph();
1930
1931         // Get the positions of the characters to be transposed.
1932         pos_type pos1 = pos - 1;
1933         pos_type pos2 = pos;
1934
1935         // In change tracking mode, ignore deleted characters.
1936         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1937                 ++pos2;
1938         if (pos2 == cur.lastpos())
1939                 return;
1940
1941         while (pos1 >= 0 && par.isDeleted(pos1))
1942                 --pos1;
1943         if (pos1 < 0)
1944                 return;
1945
1946         // Don't do anything if one of the "characters" is not regular text.
1947         if (par.isInset(pos1) || par.isInset(pos2))
1948                 return;
1949
1950         // Store the characters to be transposed (including font information).
1951         char_type const char1 = par.getChar(pos1);
1952         Font const font1 =
1953                 par.getFontSettings(cur.buffer()->params(), pos1);
1954
1955         char_type const char2 = par.getChar(pos2);
1956         Font const font2 =
1957                 par.getFontSettings(cur.buffer()->params(), pos2);
1958
1959         // And finally, we are ready to perform the transposition.
1960         // Track the changes if Change Tracking is enabled.
1961         bool const trackChanges = cur.buffer()->params().trackChanges;
1962
1963         cur.recordUndo();
1964
1965         par.eraseChar(pos2, trackChanges);
1966         par.eraseChar(pos1, trackChanges);
1967         par.insertChar(pos1, char2, font2, trackChanges);
1968         par.insertChar(pos2, char1, font1, trackChanges);
1969
1970         cur.checkBufferStructure();
1971
1972         // After the transposition, move cursor to after the transposition.
1973         setCursor(cur, cur.pit(), pos2);
1974         cur.forwardPos();
1975 }
1976
1977
1978 DocIterator Text::macrocontextPosition() const
1979 {
1980         return macrocontext_position_;
1981 }
1982
1983
1984 void Text::setMacrocontextPosition(DocIterator const & pos)
1985 {
1986         macrocontext_position_ = pos;
1987 }
1988
1989
1990 docstring Text::previousWord(CursorSlice const & sl) const
1991 {
1992         CursorSlice from = sl;
1993         CursorSlice to = sl;
1994         getWord(from, to, PREVIOUS_WORD);
1995         if (sl == from || to == from)
1996                 return docstring();
1997
1998         Paragraph const & par = sl.paragraph();
1999         return par.asString(from.pos(), to.pos());
2000 }
2001
2002
2003 bool Text::completionSupported(Cursor const & cur) const
2004 {
2005         Paragraph const & par = cur.paragraph();
2006         return cur.pos() > 0
2007                 && (cur.pos() >= par.size() || par.isWordSeparator(cur.pos()))
2008                 && !par.isWordSeparator(cur.pos() - 1);
2009 }
2010
2011
2012 CompletionList const * Text::createCompletionList(Cursor const & cur) const
2013 {
2014         return new TextCompletionList(cur);
2015 }
2016
2017
2018 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
2019 {
2020         LASSERT(cur.bv().cursor() == cur, /**/);
2021         cur.insert(s);
2022         cur.bv().cursor() = cur;
2023         if (!(cur.disp_.update() & Update::Force))
2024                 cur.updateFlags(cur.disp_.update() | Update::SinglePar);
2025         return true;
2026 }
2027
2028
2029 docstring Text::completionPrefix(Cursor const & cur) const
2030 {
2031         return previousWord(cur.top());
2032 }
2033
2034 } // namespace lyx