src/BufferView2.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2001 The LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12
  13 #include "BufferView.h"
  14 #include "buffer.h"
  15 #include "lyxcursor.h"
  16 #include "lyxtext.h"
  17 #include "frontends/LyXView.h"
  18 #include "bufferlist.h"
  19 #include "frontends/screen.h"
  20 #include "LaTeX.h"
  21 #include "BufferView_pimpl.h"
  22 #include "language.h"
  23 #include "gettext.h"
  24 #include "undo_funcs.h"
  25 #include "debug.h"
  26 #include "iterators.h"
  27 #include "lyxlex.h"
  28
  29 #include "frontends/Alert.h"
  30 #include "frontends/Dialogs.h"
  31
  32 #include "insets/insetcommand.h" //ChangeRefs
  33 #include "insets/inseterror.h"
  34
  35 #include "support/FileInfo.h"
  36 #include "support/filetools.h"
  37 #include "support/lyxfunctional.h" //equal_1st_in_pair
  38 #include "support/types.h"
  39 #include "support/lyxalgo.h" // lyx_count
  40
  41 #include <fstream>
  42
  43 extern BufferList bufferlist;
  44
  45 using lyx::pos_type;
  46
  47 using std::pair;
  48 using std::endl;
  49 using std::ifstream;
  50 using std::vector;
  51 using std::find;
  52 using std::count_if;
  53
  54
  55 // Inserts a file into current document
  56 bool BufferView::insertLyXFile(string const & filen)
  57         //
  58         // Copyright CHT Software Service GmbH
  59         // Uwe C. Schroeder
  60         //
  61         // Insert a LyXformat - file into current buffer
  62         //
  63         // Moved from lyx_cb.C (Lgb)
  64 {
  65         if (filen.empty()) return false;
  66
  67         string const fname = MakeAbsPath(filen);
  68
  69         // check if file exist
  70         FileInfo const fi(fname);
  71
  72         if (!fi.readable()) {
  73                 Alert::alert(_("Error!"),
  74                            _("Specified file is unreadable: "),
  75                            MakeDisplayPath(fname, 50));
  76                 return false;
  77         }
  78
  79         beforeChange(text);
  80
  81         ifstream ifs(fname.c_str());
  82         if (!ifs) {
  83                 Alert::alert(_("Error!"),
  84                            _("Cannot open specified file: "),
  85                            MakeDisplayPath(fname, 50));
  86                 return false;
  87         }
  88
  89         int const c = ifs.peek();
  90
  91         LyXLex lex(0, 0);
  92         lex.setStream(ifs);
  93
  94         bool res = true;
  95
  96         if (c == '#') {
  97                 lyxerr[Debug::INFO] << "Will insert file with header" << endl;
  98                 res = buffer()->readFile(lex, text->cursor.par());
  99         } else {
 100                 lyxerr[Debug::INFO] << "Will insert file without header"
 101                                     << endl;
 102                 res = buffer()->readLyXformat2(lex, text->cursor.par());
 103         }
 104
 105         resize();
 106         return res;
 107 }
 108
 109
 110 bool BufferView::removeAutoInsets()
 111 {
 112         // keep track of which pos and par the cursor was on
 113         Paragraph * cursor_par = text->cursor.par();
 114         Paragraph * cursor_par_prev = cursor_par ? cursor_par->previous() : 0;
 115         Paragraph * cursor_par_next = cursor_par ? cursor_par->next() : 0;
 116         pos_type cursor_pos = text->cursor.pos();
 117
 118         bool found = false;
 119
 120         // Trap the deletion of the paragraph the cursor is in.
 121         // Iterate until we find a paragraph that won't be immediately deleted.
 122         // In reality this should mean we only execute the body of the while
 123         // loop once at most.  However for safety we iterate rather than just
 124         // make this an if () conditional.
 125         while ((cursor_par_prev || cursor_par_next)
 126                && text->setCursor(this,
 127                                   cursor_par_prev ? cursor_par_prev : cursor_par_next,
 128                                   0)) {
 129                 // We just removed cursor_par so have to fix the "cursor"
 130                 if (cursor_par_prev) {
 131                         // '.' = cursor_par
 132                         //  a -> a.
 133                         // .
 134                         cursor_par = cursor_par_prev;
 135                         cursor_pos = cursor_par->size();
 136                 } else {
 137                         // .  -> .a
 138                         //  a
 139                         cursor_par = cursor_par_next;
 140                         cursor_pos = 0;
 141                 }
 142                 cursor_par_prev = cursor_par->previous();
 143                 cursor_par_next = cursor_par->next();
 144         }
 145
 146         // Iterate through the paragraphs removing autoDelete insets as we go.
 147         // If the paragraph ends up empty after all the autoDelete insets are
 148         // removed that paragraph will be removed by the next setCursor() call.
 149         ParIterator it = buffer()->par_iterator_begin();
 150         ParIterator end = buffer()->par_iterator_end();
 151         for (; it != end; ++it) {
 152                 Paragraph * par = *it;
 153                 Paragraph * par_prev = par ? par->previous() : 0;
 154                 bool removed = false;
 155
 156                 if (text->setCursor(this, par, 0)
 157                     && cursor_par == par_prev) {
 158                         // The previous setCursor line was deleted and that
 159                         // was the cursor_par line.  This can only happen if an
 160                         // error box was the sole item on cursor_par.
 161                         // It is possible for cursor_par_prev to be stray if
 162                         // the line it pointed to only had a error box on it
 163                         // so we have to set it to a known correct value.
 164                         // This is often the same value it already had.
 165                         cursor_par_prev = par->previous();
 166                         if (cursor_par_prev) {
 167                                 // '|' = par, '.' = cursor_par, 'E' = error box
 168                                 // First step below may occur before while{}
 169                                 //  a    |a      a     a     a.
 170                                 //  E -> .E -> |.E -> .  -> |b
 171                                 // .      b      b    |b
 172                                 //  b
 173                                 cursor_par = cursor_par_prev;
 174                                 cursor_pos = cursor_par_prev->size();
 175                                 cursor_par_prev = cursor_par->previous();
 176                                 // cursor_par_next remains the same
 177                         } else if (cursor_par_next) {
 178                                 // First step below may occur before while{}
 179                                 // .
 180                                 //  E -> |.E -> |.  -> . -> .|a
 181                                 //  a      a      a    |a
 182                                 cursor_par = cursor_par_next;
 183                                 cursor_pos = 0;
 184                                 // cursor_par_prev remains unset
 185                                 cursor_par_next = cursor_par->next();
 186                         } else {
 187                                 // I can't find a way to trigger this
 188                                 // so it should be unreachable code
 189                                 // unless the buffer is corrupted.
 190                                 lyxerr << "BufferView::removeAutoInsets() is bad\n";
 191                         }
 192                 }
 193
 194                 Paragraph::inset_iterator pit = par->inset_iterator_begin();
 195                 Paragraph::inset_iterator pend = par->inset_iterator_end();
 196                 while (pit != pend) {
 197                         if (pit->autoDelete()) {
 198                                 removed = true;
 199                                 pos_type const pos = pit.getPos();
 200
 201                                 par->erase(pos);
 202                                 // We just invalidated par's inset iterators so
 203                                 // we get the next valid iterator position
 204                                 pit = par->InsetIterator(pos);
 205                                 // and ensure we have a valid end iterator.
 206                                 pend = par->inset_iterator_end();
 207
 208                                 if (cursor_par == par) {
 209                                         // update the saved cursor position
 210                                         if (cursor_pos > pos)
 211                                                 --cursor_pos;
 212                                 }
 213                         } else {
 214                                 ++pit;
 215                         }
 216                 }
 217                 if (removed) {
 218                         found = true;
 219                         text->redoParagraph(this);
 220                 }
 221         }
 222
 223         // It is possible that the last line is empty if it was cursor_par
 224         // and/or only had an error inset on it.  So we set the cursor to the
 225         // start of the doc to force its removal and ensure a valid saved cursor
 226         if (text->setCursor(this, text->ownerParagraph(), 0)
 227             && 0 == cursor_par_next) {
 228                 cursor_par = cursor_par_prev;
 229                 cursor_pos = cursor_par->size();
 230         } else if (cursor_pos > cursor_par->size()) {
 231                 // Some C-Enter lines were removed by the setCursor call which
 232                 // then invalidated cursor_pos. It could still be "wrong" because
 233                 // the cursor may appear to have jumped but since we collapsed
 234                 // some C-Enter lines this should be a reasonable compromise.
 235                 cursor_pos = cursor_par->size();
 236         }
 237
 238         // restore the original cursor in its corrected location.
 239         text->setCursorIntern(this, cursor_par, cursor_pos);
 240
 241         return found;
 242 }
 243
 244
 245 void BufferView::insertErrors(TeXErrors & terr)
 246 {
 247         // Save the cursor position
 248         LyXCursor cursor = text->cursor;
 249
 250         TeXErrors::Errors::const_iterator cit = terr.begin();
 251         TeXErrors::Errors::const_iterator end = terr.end();
 252         for (; cit != end; ++cit) {
 253                 string const desctext(cit->error_desc);
 254                 string const errortext(cit->error_text);
 255                 string const msgtxt = desctext + '\n' + errortext;
 256                 int const errorrow = cit->error_in_line;
 257
 258                 // Insert error string for row number
 259                 int tmpid = -1;
 260                 int tmppos = -1;
 261
 262                 if (buffer()->texrow.getIdFromRow(errorrow, tmpid, tmppos)) {
 263                         buffer()->texrow.increasePos(tmpid, tmppos);
 264                 }
 265
 266                 Paragraph * texrowpar = 0;
 267
 268                 if (tmpid == -1) {
 269                         texrowpar = text->ownerParagraph();
 270                         tmppos = 0;
 271                 } else {
 272                         texrowpar = buffer()->getParFromID(tmpid);
 273                 }
 274
 275                 if (texrowpar == 0)
 276                         continue;
 277
 278                 InsetError * new_inset = new InsetError(msgtxt);
 279                 text->setCursorIntern(this, texrowpar, tmppos);
 280                 text->insertInset(this, new_inset);
 281                 text->fullRebreak(this);
 282         }
 283         // Restore the cursor position
 284         text->setCursorIntern(this, cursor.par(), cursor.pos());
 285 }
 286
 287
 288 void BufferView::setCursorFromRow(int row)
 289 {
 290         int tmpid = -1;
 291         int tmppos = -1;
 292
 293         buffer()->texrow.getIdFromRow(row, tmpid, tmppos);
 294
 295         Paragraph * texrowpar;
 296
 297         if (tmpid == -1) {
 298                 texrowpar = text->ownerParagraph();
 299                 tmppos = 0;
 300         } else {
 301                 texrowpar = buffer()->getParFromID(tmpid);
 302         }
 303         text->setCursor(this, texrowpar, tmppos);
 304 }
 305
 306
 307 bool BufferView::insertInset(Inset * inset, string const & lout)
 308 {
 309         return pimpl_->insertInset(inset, lout);
 310 }
 311
 312
 313 /* This is also a buffer property (ale) */
 314 // Not so sure about that. a goto Label function can not be buffer local, just
 315 // think how this will work in a multiwindo/buffer environment, all the
 316 // cursors in all the views showing this buffer will move. (Lgb)
 317 // OK, then no cursor action should be allowed in buffer. (ale)
 318 bool BufferView::gotoLabel(string const & label)
 319
 320 {
 321         for (Buffer::inset_iterator it = buffer()->inset_iterator_begin();
 322              it != buffer()->inset_iterator_end(); ++it) {
 323                 vector<string> labels = (*it)->getLabelList();
 324                 if (find(labels.begin(),labels.end(),label)
 325                      != labels.end()) {
 326                         beforeChange(text);
 327                         text->setCursor(this, it.getPar(), it.getPos());
 328                         text->selection.cursor = text->cursor;
 329                         update(text, BufferView::SELECT|BufferView::FITCUR);
 330                         return true;
 331                 }
 332         }
 333         return false;
 334 }
 335
 336
 337 void BufferView::menuUndo()
 338 {
 339         if (!available())
 340                 return;
 341
 342         owner()->message(_("Undo"));
 343         hideCursor();
 344         beforeChange(text);
 345         update(text, BufferView::SELECT|BufferView::FITCUR);
 346         if (!textUndo(this))
 347                 owner()->message(_("No further undo information"));
 348         else
 349                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 350         switchKeyMap();
 351 }
 352
 353
 354 void BufferView::menuRedo()
 355 {
 356         if (!available())
 357                 return;
 358
 359         owner()->message(_("Redo"));
 360         hideCursor();
 361         beforeChange(text);
 362         update(text, BufferView::SELECT|BufferView::FITCUR);
 363         if (!textRedo(this))
 364                 owner()->message(_("No further redo information"));
 365         else
 366                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 367         switchKeyMap();
 368 }
 369
 370
 371 void BufferView::copyEnvironment()
 372 {
 373         if (available()) {
 374                 text->copyEnvironmentType();
 375                 owner()->message(_("Paragraph environment type copied"));
 376         }
 377 }
 378
 379
 380 void BufferView::pasteEnvironment()
 381 {
 382         if (available()) {
 383                 text->pasteEnvironmentType(this);
 384                 owner()->message(_("Paragraph environment type set"));
 385                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 386         }
 387 }
 388
 389
 390 void BufferView::copy()
 391 {
 392         if (available()) {
 393                 getLyXText()->copySelection(this);
 394                 owner()->message(_("Copy"));
 395         }
 396 }
 397
 398
 399 void BufferView::cut(bool realcut)
 400 {
 401         if (available()) {
 402                 hideCursor();
 403                 update(text, BufferView::SELECT|BufferView::FITCUR);
 404                 text->cutSelection(this, true, realcut);
 405                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 406                 owner()->message(_("Cut"));
 407         }
 408 }
 409
 410
 411 void BufferView::paste()
 412 {
 413         if (!available())
 414                 return;
 415
 416         owner()->message(_("Paste"));
 417
 418         hideCursor();
 419         // clear the selection
 420         toggleSelection();
 421         text->clearSelection();
 422         update(text, BufferView::SELECT|BufferView::FITCUR);
 423
 424         // paste
 425         text->pasteSelection(this);
 426         // bug 393
 427         text->clearSelection();
 428         update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 429 // why fake a selection only I think it should be a real one and not only
 430 // a painted one (Jug 20020318).
 431 #if 0
 432         // clear the selection
 433         toggleSelection();
 434         text->clearSelection();
 435         update(text, BufferView::SELECT|BufferView::FITCUR);
 436 #endif
 437 }
 438
 439
 440 /* these functions are for the spellchecker */
 441 WordLangTuple const BufferView::nextWord(float & value)
 442 {
 443         if (!available()) {
 444                 value = 1;
 445                 return WordLangTuple();
 446         }
 447
 448         return text->selectNextWordToSpellcheck(this, value);
 449 }
 450
 451
 452 void BufferView::selectLastWord()
 453 {
 454         if (!available()) return;
 455
 456         LyXCursor cur = text->selection.cursor;
 457         hideCursor();
 458         beforeChange(text);
 459         text->selection.cursor = cur;
 460         text->selectSelectedWord(this);
 461         toggleSelection(false);
 462         update(text, BufferView::SELECT|BufferView::FITCUR);
 463 }
 464
 465
 466 void BufferView::endOfSpellCheck()
 467 {
 468         if (!available()) return;
 469
 470         hideCursor();
 471         beforeChange(text);
 472         text->selectSelectedWord(this);
 473         text->clearSelection();
 474         update(text, BufferView::SELECT|BufferView::FITCUR);
 475 }
 476
 477
 478 void BufferView::replaceWord(string const & replacestring)
 479 {
 480         if (!available()) return;
 481
 482         LyXText * tt = getLyXText();
 483         hideCursor();
 484         update(tt, BufferView::SELECT|BufferView::FITCUR);
 485
 486         /* clear the selection (if there is any) */
 487         toggleSelection(false);
 488         update(tt, BufferView::SELECT|BufferView::FITCUR);
 489
 490         /* clear the selection (if there is any) */
 491         toggleSelection(false);
 492         tt->replaceSelectionWithString(this, replacestring);
 493
 494         tt->setSelectionOverString(this, replacestring);
 495
 496         // Go back so that replacement string is also spellchecked
 497         for (string::size_type i = 0; i < replacestring.length() + 1; ++i) {
 498                 tt->cursorLeft(this);
 499         }
 500         update(tt, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 501 }
 502 // End of spellchecker stuff
 503
 504
 505 bool BufferView::lockInset(UpdatableInset * inset)
 506 {
 507         if (!inset)
 508                 return false;
 509         // don't relock if we're already locked
 510         if (theLockingInset() == inset)
 511                 return true;
 512         if (!theLockingInset()) {
 513                 // first check if it's the inset under the cursor we want lock
 514                 // should be most of the time
 515                 char const c = text->cursor.par()->getChar(text->cursor.pos());
 516                 if (c == Paragraph::META_INSET) {
 517                         Inset * in = text->cursor.par()->getInset(text->cursor.pos());
 518                         if (inset == in) {
 519                                 theLockingInset(inset);
 520                                 return true;
 521                         }
 522                 }
 523                 // Then do a deep look of the inset and lock the right one
 524                 Paragraph * par = buffer()->paragraph;
 525                 int const id = inset->id();
 526                 while(par) {
 527                         Paragraph::inset_iterator it =
 528                                 par->inset_iterator_begin();
 529                         Paragraph::inset_iterator const end =
 530                                 par->inset_iterator_end();
 531                         for (; it != end; ++it) {
 532                                 if ((*it) == inset) {
 533                                         text->setCursorIntern(this, par, it.getPos());
 534                                         theLockingInset(inset);
 535                                         return true;
 536                                 }
 537                                 if ((*it)->getInsetFromID(id)) {
 538                                         text->setCursorIntern(this, par, it.getPos());
 539                                         (*it)->edit(this);
 540                                         return theLockingInset()->lockInsetInInset(this, inset);
 541                                 }
 542                         }
 543                         par = par->next();
 544                 }
 545                 return false;
 546         }
 547         return theLockingInset()->lockInsetInInset(this, inset);
 548 }
 549
 550
 551 void BufferView::showLockedInsetCursor(int x, int y, int asc, int desc)
 552 {
 553         if (available() && theLockingInset() && !theLockingInset()->nodraw()) {
 554                 LyXCursor cursor = text->cursor;
 555                 Inset * locking_inset = theLockingInset()->getLockingInset();
 556
 557                 if ((cursor.pos() - 1 >= 0) &&
 558                     cursor.par()->isInset(cursor.pos() - 1) &&
 559                     (cursor.par()->getInset(cursor.pos() - 1) ==
 560                      locking_inset))
 561                         text->setCursor(this, cursor,
 562                                         cursor.par(), cursor.pos() - 1);
 563                 LyXScreen::Cursor_Shape shape = LyXScreen::BAR_SHAPE;
 564                 LyXText * txt = getLyXText();
 565                 if (locking_inset->isTextInset() &&
 566                     locking_inset->lyxCode() != Inset::ERT_CODE &&
 567                     (txt->real_current_font.language() !=
 568                      buffer()->params.language
 569                      || txt->real_current_font.isVisibleRightToLeft()
 570                      != buffer()->params.language->RightToLeft()))
 571                         shape = (txt->real_current_font.isVisibleRightToLeft())
 572                                 ? LyXScreen::REVERSED_L_SHAPE
 573                                 : LyXScreen::L_SHAPE;
 574                 y += cursor.iy() + theLockingInset()->insetInInsetY();
 575                 screen().showManualCursor(text, x, y, asc, desc,
 576                                                   shape);
 577         }
 578 }
 579
 580
 581 void BufferView::hideLockedInsetCursor()
 582 {
 583         if (theLockingInset() && available()) {
 584                 screen().hideCursor();
 585         }
 586 }
 587
 588
 589 bool BufferView::fitLockedInsetCursor(int x, int y, int asc, int desc)
 590 {
 591         if (theLockingInset() && available()) {
 592                 y += text->cursor.iy() + theLockingInset()->insetInInsetY();
 593                 if (screen().fitManualCursor(this, text, x, y, asc, desc)) {
 594                         updateScrollbar();
 595                         return true;
 596                 }
 597         }
 598         return false;
 599 }
 600
 601
 602 int BufferView::unlockInset(UpdatableInset * inset)
 603 {
 604         if (!inset)
 605                 return 0;
 606         if (inset && theLockingInset() == inset) {
 607                 inset->insetUnlock(this);
 608                 theLockingInset(0);
 609                 // make sure we update the combo !
 610                 owner()->setLayout(getLyXText()->cursor.par()->layout()->name());
 611                 // Tell the paragraph dialog that we changed paragraph
 612                 owner()->getDialogs()->updateParagraph();
 613                 finishUndo();
 614                 return 0;
 615         } else if (inset && theLockingInset() &&
 616                    theLockingInset()->unlockInsetInInset(this, inset)) {
 617                 // Tell the paragraph dialog that we changed paragraph
 618                 owner()->getDialogs()->updateParagraph();
 619                 // owner inset has updated the layout combo
 620                 finishUndo();
 621                 return 0;
 622         }
 623         return bufferlist.unlockInset(inset);
 624 }
 625
 626
 627 void BufferView::lockedInsetStoreUndo(Undo::undo_kind kind)
 628 {
 629         if (!theLockingInset())
 630                 return; // shouldn't happen
 631         if (kind == Undo::EDIT) // in this case insets would not be stored!
 632                 kind = Undo::FINISH;
 633         setUndo(this, kind,
 634                 text->cursor.par(),
 635                 text->cursor.par()->next());
 636 }
 637
 638
 639 void BufferView::updateInset(Inset * inset, bool mark_dirty)
 640 {
 641         pimpl_->updateInset(inset, mark_dirty);
 642 }
 643
 644
 645 bool BufferView::ChangeInsets(Inset::Code code,
 646                               string const & from, string const & to)
 647 {
 648         bool need_update = false;
 649         LyXCursor cursor = text->cursor;
 650         LyXCursor tmpcursor = cursor;
 651         cursor.par(tmpcursor.par());
 652         cursor.pos(tmpcursor.pos());
 653
 654         ParIterator end = buffer()->par_iterator_end();
 655         for (ParIterator it = buffer()->par_iterator_begin();
 656              it != end; ++it) {
 657                 Paragraph * par = *it;
 658                 bool changed_inset = false;
 659                 for (Paragraph::inset_iterator it2 = par->inset_iterator_begin();
 660                      it2 != par->inset_iterator_end(); ++it2) {
 661                         if ((*it2)->lyxCode() == code) {
 662                                 InsetCommand * inset = static_cast<InsetCommand *>(*it2);
 663                                 if (inset->getContents() == from) {
 664                                         inset->setContents(to);
 665                                         changed_inset = true;
 666                                 }
 667                         }
 668                 }
 669                 if (changed_inset) {
 670                         need_update = true;
 671
 672                         // FIXME
 673
 674                         // The test it.size()==1 was needed to prevent crashes.
 675                         // How to set the cursor corretly when it.size()>1 ??
 676                         if (it.size() == 1) {
 677                                 text->setCursorIntern(this, par, 0);
 678                                 text->redoParagraphs(this, text->cursor,
 679                                                      text->cursor.par()->next());
 680                                 text->fullRebreak(this);
 681                         }
 682                 }
 683         }
 684         text->setCursorIntern(this, cursor.par(), cursor.pos());
 685         return need_update;
 686 }
 687
 688
 689 bool BufferView::ChangeRefsIfUnique(string const & from, string const & to)
 690 {
 691         // Check if the label 'from' appears more than once
 692         vector<string> labels = buffer()->getLabelList();
 693
 694         if (lyx::count(labels.begin(), labels.end(), from) > 1)
 695                 return false;
 696
 697         return ChangeInsets(Inset::REF_CODE, from, to);
 698 }
 699
 700
 701 bool BufferView::ChangeCitationsIfUnique(string const & from,
 702                                          string const & to)
 703 {
 704         typedef pair<string, string> StringPair;
 705
 706         vector<StringPair> keys = buffer()->getBibkeyList();
 707         if (count_if(keys.begin(), keys.end(),
 708                      lyx::equal_1st_in_pair<StringPair>(from))
 709             > 1)
 710                 return false;
 711
 712         return ChangeInsets(Inset::CITE_CODE, from, to);
 713 }
 714
 715
 716 UpdatableInset * BufferView::theLockingInset() const
 717 {
 718         // If NULL is not allowed we should put an Assert here. (Lgb)
 719         if (text)
 720                 return text->the_locking_inset;
 721         return 0;
 722 }
 723
 724
 725 void BufferView::theLockingInset(UpdatableInset * inset)
 726 {
 727         text->the_locking_inset = inset;
 728 }
 729
 730
 731 LyXText * BufferView::getLyXText() const
 732 {
 733         if (theLockingInset()) {
 734                 LyXText * txt = theLockingInset()->getLyXText(this, true);
 735                 if (txt)
 736                         return txt;
 737         }
 738         return text;
 739 }
 740
 741
 742 LyXText * BufferView::getParentText(Inset * inset) const
 743 {
 744         if (inset->owner()) {
 745                 LyXText * txt = inset->getLyXText(this);
 746                 inset = inset->owner();
 747                 while (inset && inset->getLyXText(this) == txt)
 748                         inset = inset->owner();
 749                 if (inset)
 750                         return inset->getLyXText(this);
 751         }
 752         return text;
 753 }
 754
 755
 756 Language const * BufferView::getParentLanguage(Inset * inset) const
 757 {
 758         LyXText * text = getParentText(inset);
 759         return text->cursor.par()->getFontSettings(buffer()->params,
 760                                                    text->cursor.pos()).language();
 761 }