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
  28 #include "frontends/Alert.h"
  29 #include "frontends/Dialogs.h"
  30
  31 #include "insets/insetcommand.h" //ChangeRefs
  32 #include "insets/inseterror.h"
  33
  34 #include "support/FileInfo.h"
  35 #include "support/filetools.h"
  36 #include "support/lyxfunctional.h" //equal_1st_in_pair
  37 #include "support/types.h"
  38 #include "support/lyxalgo.h" // lyx_count
  39
  40 #include <fstream>
  41
  42 extern BufferList bufferlist;
  43
  44 using lyx::pos_type;
  45
  46 using std::pair;
  47 using std::endl;
  48 using std::ifstream;
  49 using std::vector;
  50 using std::find;
  51 using std::count_if;
  52
  53
  54 // Inserts a file into current document
  55 bool BufferView::insertLyXFile(string const & filen)
  56         //
  57         // Copyright CHT Software Service GmbH
  58         // Uwe C. Schroeder
  59         //
  60         // Insert a Lyxformat - file into current buffer
  61         //
  62         // Moved from lyx_cb.C (Lgb)
  63 {
  64         if (filen.empty()) return false;
  65
  66         string const fname = MakeAbsPath(filen);
  67
  68         // check if file exist
  69         FileInfo const fi(fname);
  70
  71         if (!fi.readable()) {
  72                 Alert::alert(_("Error!"),
  73                            _("Specified file is unreadable: "),
  74                            MakeDisplayPath(fname, 50));
  75                 return false;
  76         }
  77
  78         beforeChange(text);
  79
  80         ifstream ifs(fname.c_str());
  81         if (!ifs) {
  82                 Alert::alert(_("Error!"),
  83                            _("Cannot open specified file: "),
  84                            MakeDisplayPath(fname, 50));
  85                 return false;
  86         }
  87
  88         int const c = ifs.peek();
  89
  90         LyXLex lex(0, 0);
  91         lex.setStream(ifs);
  92
  93         bool res = true;
  94
  95         if (c == '#') {
  96                 lyxerr[Debug::INFO] << "Will insert file with header" << endl;
  97                 res = buffer()->readFile(lex, text->cursor.par());
  98         } else {
  99                 lyxerr[Debug::INFO] << "Will insert file without header"
 100                                     << endl;
 101                 res = buffer()->readLyXformat2(lex, text->cursor.par());
 102         }
 103
 104         resize();
 105         return res;
 106 }
 107
 108
 109 bool BufferView::removeAutoInsets()
 110 {
 111         // keep track of which pos and par the cursor was on
 112         Paragraph * cursor_par = text->cursor.par();
 113         Paragraph * cursor_par_prev = cursor_par ? cursor_par->previous() : 0;
 114         Paragraph * cursor_par_next = cursor_par ? cursor_par->next() : 0;
 115         pos_type cursor_pos = text->cursor.pos();
 116
 117         bool found = false;
 118
 119         // Trap the deletion of the paragraph the cursor is in.
 120         // Iterate until we find a paragraph that won't be immediately deleted.
 121         // In reality this should mean we only execute the body of the while
 122         // loop once at most.  However for safety we iterate rather than just
 123         // make this an if () conditional.
 124         while ((cursor_par_prev || cursor_par_next)
 125                && text->setCursor(this,
 126                                   cursor_par_prev ? cursor_par_prev : cursor_par_next,
 127                                   0)) {
 128                 // We just removed cursor_par so have to fix the "cursor"
 129                 if (cursor_par_prev) {
 130                         // '.' = cursor_par
 131                         //  a -> a.
 132                         // .
 133                         cursor_par = cursor_par_prev;
 134                         cursor_pos = cursor_par->size();
 135                 } else {
 136                         // .  -> .a
 137                         //  a
 138                         cursor_par = cursor_par_next;
 139                         cursor_pos = 0;
 140                 }
 141                 cursor_par_prev = cursor_par->previous();
 142                 cursor_par_next = cursor_par->next();
 143         }
 144
 145         // Iterate through the paragraphs removing autoDelete insets as we go.
 146         // If the paragraph ends up empty after all the autoDelete insets are
 147         // removed that paragraph will be removed by the next setCursor() call.
 148         ParIterator it = buffer()->par_iterator_begin();
 149         ParIterator end = buffer()->par_iterator_end();
 150         for (; it != end; ++it) {
 151                 Paragraph * par = *it;
 152                 Paragraph * par_prev = par ? par->previous() : 0;
 153                 bool removed = false;
 154
 155                 if (text->setCursor(this, par, 0)
 156                     && cursor_par == par_prev) {
 157                         // The previous setCursor line was deleted and that
 158                         // was the cursor_par line.  This can only happen if an
 159                         // error box was the sole item on cursor_par.
 160                         // It is possible for cursor_par_prev to be stray if
 161                         // the line it pointed to only had a error box on it
 162                         // so we have to set it to a known correct value.
 163                         // This is often the same value it already had.
 164                         cursor_par_prev = par->previous();
 165                         if (cursor_par_prev) {
 166                                 // '|' = par, '.' = cursor_par, 'E' = error box
 167                                 // First step below may occur before while{}
 168                                 //  a    |a      a     a     a.
 169                                 //  E -> .E -> |.E -> .  -> |b
 170                                 // .      b      b    |b
 171                                 //  b
 172                                 cursor_par = cursor_par_prev;
 173                                 cursor_pos = cursor_par_prev->size();
 174                                 cursor_par_prev = cursor_par->previous();
 175                                 // cursor_par_next remains the same
 176                         } else if (cursor_par_next) {
 177                                 // First step below may occur before while{}
 178                                 // .
 179                                 //  E -> |.E -> |.  -> . -> .|a
 180                                 //  a      a      a    |a
 181                                 cursor_par = cursor_par_next;
 182                                 cursor_pos = 0;
 183                                 // cursor_par_prev remains unset
 184                                 cursor_par_next = cursor_par->next();
 185                         } else {
 186                                 // I can't find a way to trigger this
 187                                 // so it should be unreachable code
 188                                 // unless the buffer is corrupted.
 189                                 lyxerr << "BufferView::removeAutoInsets() is bad\n";
 190                         }
 191                 }
 192
 193                 Paragraph::inset_iterator pit = par->inset_iterator_begin();
 194                 Paragraph::inset_iterator pend = par->inset_iterator_end();
 195                 while (pit != pend) {
 196                         if (pit->autoDelete()) {
 197                                 removed = true;
 198                                 pos_type const pos = pit.getPos();
 199
 200                                 par->erase(pos);
 201                                 // We just invalidated par's inset iterators so
 202                                 // we get the next valid iterator position
 203                                 pit = par->InsetIterator(pos);
 204                                 // and ensure we have a valid end iterator.
 205                                 pend = par->inset_iterator_end();
 206
 207                                 if (cursor_par == par) {
 208                                         // update the saved cursor position
 209                                         if (cursor_pos > pos)
 210                                                 --cursor_pos;
 211                                 }
 212                         } else {
 213                                 ++pit;
 214                         }
 215                 }
 216                 if (removed) {
 217                         found = true;
 218                         text->redoParagraph(this);
 219                 }
 220         }
 221
 222         // It is possible that the last line is empty if it was cursor_par
 223         // and/or only had an error inset on it.  So we set the cursor to the
 224         // start of the doc to force its removal and ensure a valid saved cursor
 225         if (text->setCursor(this, text->ownerParagraph(), 0)
 226             && 0 == cursor_par_next) {
 227                 cursor_par = cursor_par_prev;
 228                 cursor_pos = cursor_par->size();
 229         } else if (cursor_pos > cursor_par->size()) {
 230                 // Some C-Enter lines were removed by the setCursor call which
 231                 // then invalidated cursor_pos. It could still be "wrong" because
 232                 // the cursor may appear to have jumped but since we collapsed
 233                 // some C-Enter lines this should be a reasonable compromise.
 234                 cursor_pos = cursor_par->size();
 235         }
 236
 237         // restore the original cursor in its corrected location.
 238         text->setCursorIntern(this, cursor_par, cursor_pos);
 239
 240         return found;
 241 }
 242
 243
 244 void BufferView::insertErrors(TeXErrors & terr)
 245 {
 246         // Save the cursor position
 247         LyXCursor cursor = text->cursor;
 248
 249         TeXErrors::Errors::const_iterator cit = terr.begin();
 250         TeXErrors::Errors::const_iterator end = terr.end();
 251         for (; cit != end; ++cit) {
 252                 string const desctext(cit->error_desc);
 253                 string const errortext(cit->error_text);
 254                 string const msgtxt = desctext + '\n' + errortext;
 255                 int const errorrow = cit->error_in_line;
 256
 257                 // Insert error string for row number
 258                 int tmpid = -1;
 259                 int tmppos = -1;
 260
 261                 if (buffer()->texrow.getIdFromRow(errorrow, tmpid, tmppos)) {
 262                         buffer()->texrow.increasePos(tmpid, tmppos);
 263                 }
 264
 265                 Paragraph * texrowpar = 0;
 266
 267                 if (tmpid == -1) {
 268                         texrowpar = text->ownerParagraph();
 269                         tmppos = 0;
 270                 } else {
 271                         texrowpar = buffer()->getParFromID(tmpid);
 272                 }
 273
 274                 if (texrowpar == 0)
 275                         continue;
 276
 277                 InsetError * new_inset = new InsetError(msgtxt);
 278                 text->setCursorIntern(this, texrowpar, tmppos);
 279                 text->insertInset(this, new_inset);
 280                 text->fullRebreak(this);
 281         }
 282         // Restore the cursor position
 283         text->setCursorIntern(this, cursor.par(), cursor.pos());
 284 }
 285
 286
 287 void BufferView::setCursorFromRow(int row)
 288 {
 289         int tmpid = -1;
 290         int tmppos = -1;
 291
 292         buffer()->texrow.getIdFromRow(row, tmpid, tmppos);
 293
 294         Paragraph * texrowpar;
 295
 296         if (tmpid == -1) {
 297                 texrowpar = text->ownerParagraph();
 298                 tmppos = 0;
 299         } else {
 300                 texrowpar = buffer()->getParFromID(tmpid);
 301         }
 302         text->setCursor(this, texrowpar, tmppos);
 303 }
 304
 305
 306 bool BufferView::insertInset(Inset * inset, string const & lout)
 307 {
 308         return pimpl_->insertInset(inset, lout);
 309 }
 310
 311
 312 /* This is also a buffer property (ale) */
 313 // Not so sure about that. a goto Label function can not be buffer local, just
 314 // think how this will work in a multiwindo/buffer environment, all the
 315 // cursors in all the views showing this buffer will move. (Lgb)
 316 // OK, then no cursor action should be allowed in buffer. (ale)
 317 bool BufferView::gotoLabel(string const & label)
 318
 319 {
 320         for (Buffer::inset_iterator it = buffer()->inset_iterator_begin();
 321              it != buffer()->inset_iterator_end(); ++it) {
 322                 vector<string> labels = (*it)->getLabelList();
 323                 if (find(labels.begin(),labels.end(),label)
 324                      != labels.end()) {
 325                         beforeChange(text);
 326                         text->setCursor(this, it.getPar(), it.getPos());
 327                         text->selection.cursor = text->cursor;
 328                         update(text, BufferView::SELECT|BufferView::FITCUR);
 329                         return true;
 330                 }
 331         }
 332         return false;
 333 }
 334
 335
 336 void BufferView::menuUndo()
 337 {
 338         if (available()) {
 339                 owner()->message(_("Undo"));
 340                 hideCursor();
 341                 beforeChange(text);
 342                 update(text, BufferView::SELECT|BufferView::FITCUR);
 343                 if (!textUndo(this))
 344                         owner()->message(_("No further undo information"));
 345                 else
 346                         update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 347                 setState();
 348         }
 349 }
 350
 351
 352 void BufferView::menuRedo()
 353 {
 354 #if 0 // this should not be here (Jug 20011206)
 355         if (theLockingInset()) {
 356                 owner()->message(_("Redo not yet supported in math mode"));
 357                 return;
 358         }
 359 #endif
 360
 361         if (available()) {
 362                 owner()->message(_("Redo"));
 363                 hideCursor();
 364                 beforeChange(text);
 365                 update(text, BufferView::SELECT|BufferView::FITCUR);
 366                 if (!textRedo(this))
 367                         owner()->message(_("No further redo information"));
 368                 else
 369                         update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 370                 setState();
 371         }
 372 }
 373
 374
 375 void BufferView::copyEnvironment()
 376 {
 377         if (available()) {
 378                 text->copyEnvironmentType();
 379                 owner()->message(_("Paragraph environment type copied"));
 380         }
 381 }
 382
 383
 384 void BufferView::pasteEnvironment()
 385 {
 386         if (available()) {
 387                 text->pasteEnvironmentType(this);
 388                 owner()->message(_("Paragraph environment type set"));
 389                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 390         }
 391 }
 392
 393
 394 void BufferView::copy()
 395 {
 396         if (available()) {
 397                 getLyXText()->copySelection(this);
 398                 owner()->message(_("Copy"));
 399         }
 400 }
 401
 402
 403 void BufferView::cut(bool realcut)
 404 {
 405         if (available()) {
 406                 hideCursor();
 407                 update(text, BufferView::SELECT|BufferView::FITCUR);
 408                 text->cutSelection(this, true, realcut);
 409                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 410                 owner()->message(_("Cut"));
 411         }
 412 }
 413
 414
 415 void BufferView::paste()
 416 {
 417         if (!available())
 418                 return;
 419
 420         owner()->message(_("Paste"));
 421
 422         hideCursor();
 423         // clear the selection
 424         toggleSelection();
 425         text->clearSelection();
 426         update(text, BufferView::SELECT|BufferView::FITCUR);
 427
 428         // paste
 429         text->pasteSelection(this);
 430         // bug 393
 431         text->clearSelection();
 432         update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 433 // why fake a selection only I think it should be a real one and not only
 434 // a painted one (Jug 20020318).
 435 #if 0
 436         // clear the selection
 437         toggleSelection();
 438         text->clearSelection();
 439         update(text, BufferView::SELECT|BufferView::FITCUR);
 440 #endif
 441 }
 442
 443
 444 /* these functions are for the spellchecker */
 445 string const BufferView::nextWord(float & value)
 446 {
 447         if (!available()) {
 448                 value = 1;
 449                 return string();
 450         }
 451
 452         return text->selectNextWordToSpellcheck(this, value);
 453 }
 454
 455
 456 void BufferView::selectLastWord()
 457 {
 458         if (!available()) return;
 459
 460         LyXCursor cur = text->selection.cursor;
 461         hideCursor();
 462         beforeChange(text);
 463         text->selection.cursor = cur;
 464         text->selectSelectedWord(this);
 465         toggleSelection(false);
 466         update(text, BufferView::SELECT|BufferView::FITCUR);
 467 }
 468
 469
 470 void BufferView::endOfSpellCheck()
 471 {
 472         if (!available()) return;
 473
 474         hideCursor();
 475         beforeChange(text);
 476         text->selectSelectedWord(this);
 477         text->clearSelection();
 478         update(text, BufferView::SELECT|BufferView::FITCUR);
 479 }
 480
 481
 482 void BufferView::replaceWord(string const & replacestring)
 483 {
 484         if (!available()) return;
 485
 486         LyXText * tt = getLyXText();
 487         hideCursor();
 488         update(tt, BufferView::SELECT|BufferView::FITCUR);
 489
 490         /* clear the selection (if there is any) */
 491         toggleSelection(false);
 492         update(tt, BufferView::SELECT|BufferView::FITCUR);
 493
 494         /* clear the selection (if there is any) */
 495         toggleSelection(false);
 496         tt->replaceSelectionWithString(this, replacestring);
 497
 498         tt->setSelectionOverString(this, replacestring);
 499
 500         // Go back so that replacement string is also spellchecked
 501         for (string::size_type i = 0; i < replacestring.length() + 1; ++i) {
 502                 tt->cursorLeft(this);
 503         }
 504         update(tt, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 505 }
 506 // End of spellchecker stuff
 507
 508
 509 bool BufferView::lockInset(UpdatableInset * inset)
 510 {
 511         if (!inset)
 512                 return false;
 513         // don't relock if we're already locked
 514         if (theLockingInset() == inset)
 515                 return true;
 516         if (!theLockingInset()) {
 517                 // first check if it's the inset under the cursor we want lock
 518                 // should be most of the time
 519                 char const c = text->cursor.par()->getChar(text->cursor.pos());
 520                 if (c == Paragraph::META_INSET) {
 521                         Inset * in = text->cursor.par()->getInset(text->cursor.pos());
 522                         if (inset == in) {
 523                                 theLockingInset(inset);
 524                                 return true;
 525                         }
 526                 }
 527                 // Then do a deep look of the inset and lock the right one
 528                 Paragraph * par = buffer()->paragraph;
 529                 int const id = inset->id();
 530                 while(par) {
 531                         Paragraph::inset_iterator it =
 532                                 par->inset_iterator_begin();
 533                         Paragraph::inset_iterator const end =
 534                                 par->inset_iterator_end();
 535                         for (; it != end; ++it) {
 536                                 if ((*it) == inset) {
 537                                         text->setCursorIntern(this, par, it.getPos());
 538                                         theLockingInset(inset);
 539                                         return true;
 540                                 }
 541                                 if ((*it)->getInsetFromID(id)) {
 542                                         text->setCursorIntern(this, par, it.getPos());
 543                                         (*it)->edit(this);
 544                                         return theLockingInset()->lockInsetInInset(this, inset);
 545                                 }
 546                         }
 547                         par = par->next();
 548                 }
 549                 return false;
 550         }
 551         return theLockingInset()->lockInsetInInset(this, inset);
 552 }
 553
 554
 555 void BufferView::showLockedInsetCursor(int x, int y, int asc, int desc)
 556 {
 557         if (available() && theLockingInset() && !theLockingInset()->nodraw()) {
 558                 LyXCursor cursor = text->cursor;
 559                 Inset * locking_inset = theLockingInset()->getLockingInset();
 560
 561                 if ((cursor.pos() - 1 >= 0) &&
 562                     cursor.par()->isInset(cursor.pos() - 1) &&
 563                     (cursor.par()->getInset(cursor.pos() - 1) ==
 564                      locking_inset))
 565                         text->setCursor(this, cursor,
 566                                         cursor.par(), cursor.pos() - 1);
 567                 LyXScreen::Cursor_Shape shape = LyXScreen::BAR_SHAPE;
 568                 LyXText * txt = getLyXText();
 569                 if (locking_inset->isTextInset() &&
 570                     locking_inset->lyxCode() != Inset::ERT_CODE &&
 571                     (txt->real_current_font.language() !=
 572                      buffer()->params.language
 573                      || txt->real_current_font.isVisibleRightToLeft()
 574                      != buffer()->params.language->RightToLeft()))
 575                         shape = (txt->real_current_font.isVisibleRightToLeft())
 576                                 ? LyXScreen::REVERSED_L_SHAPE
 577                                 : LyXScreen::L_SHAPE;
 578                 y += cursor.iy() + theLockingInset()->insetInInsetY();
 579                 screen().showManualCursor(text, x, y, asc, desc,
 580                                                   shape);
 581         }
 582 }
 583
 584
 585 void BufferView::hideLockedInsetCursor()
 586 {
 587         if (theLockingInset() && available()) {
 588                 screen().hideCursor();
 589         }
 590 }
 591
 592
 593 bool BufferView::fitLockedInsetCursor(int x, int y, int asc, int desc)
 594 {
 595         if (theLockingInset() && available()) {
 596                 y += text->cursor.iy() + theLockingInset()->insetInInsetY();
 597                 if (screen().fitManualCursor(this, text, x, y, asc, desc)) {
 598                         updateScrollbar();
 599                         return true;
 600                 }
 601         }
 602         return false;
 603 }
 604
 605
 606 int BufferView::unlockInset(UpdatableInset * inset)
 607 {
 608         if (!inset)
 609                 return 0;
 610         if (inset && theLockingInset() == inset) {
 611                 inset->insetUnlock(this);
 612                 theLockingInset(0);
 613                 // make sure we update the combo !
 614                 owner()->setLayout(getLyXText()->cursor.par()->layout()->name());
 615                 // Tell the paragraph dialog that we changed paragraph
 616                 owner()->getDialogs()->updateParagraph();
 617                 finishUndo();
 618                 return 0;
 619         } else if (inset && theLockingInset() &&
 620                    theLockingInset()->unlockInsetInInset(this, inset)) {
 621                 // Tell the paragraph dialog that we changed paragraph
 622                 owner()->getDialogs()->updateParagraph();
 623                 // owner inset has updated the layout combo
 624                 finishUndo();
 625                 return 0;
 626         }
 627         return bufferlist.unlockInset(inset);
 628 }
 629
 630
 631 void BufferView::lockedInsetStoreUndo(Undo::undo_kind kind)
 632 {
 633         if (!theLockingInset())
 634                 return; // shouldn't happen
 635         if (kind == Undo::EDIT) // in this case insets would not be stored!
 636                 kind = Undo::FINISH;
 637         setUndo(this, kind,
 638                 text->cursor.par(),
 639                 text->cursor.par()->next());
 640 }
 641
 642
 643 void BufferView::updateInset(Inset * inset, bool mark_dirty)
 644 {
 645         pimpl_->updateInset(inset, mark_dirty);
 646 }
 647
 648
 649 bool BufferView::ChangeInsets(Inset::Code code,
 650                               string const & from, string const & to)
 651 {
 652         bool need_update = false;
 653         LyXCursor cursor = text->cursor;
 654         LyXCursor tmpcursor = cursor;
 655         cursor.par(tmpcursor.par());
 656         cursor.pos(tmpcursor.pos());
 657
 658         ParIterator end = buffer()->par_iterator_end();
 659         for (ParIterator it = buffer()->par_iterator_begin();
 660              it != end; ++it) {
 661                 Paragraph * par = *it;
 662                 bool changed_inset = false;
 663                 for (Paragraph::inset_iterator it2 = par->inset_iterator_begin();
 664                      it2 != par->inset_iterator_end(); ++it2) {
 665                         if ((*it2)->lyxCode() == code) {
 666                                 InsetCommand * inset = static_cast<InsetCommand *>(*it2);
 667                                 if (inset->getContents() == from) {
 668                                         inset->setContents(to);
 669                                         changed_inset = true;
 670                                 }
 671                         }
 672                 }
 673                 if (changed_inset) {
 674                         need_update = true;
 675
 676                         // FIXME
 677
 678                         // The test it.size()==1 was needed to prevent crashes.
 679                         // How to set the cursor corretly when it.size()>1 ??
 680                         if (it.size() == 1) {
 681                                 text->setCursorIntern(this, par, 0);
 682                                 text->redoParagraphs(this, text->cursor,
 683                                                      text->cursor.par()->next());
 684                                 text->fullRebreak(this);
 685                         }
 686                 }
 687         }
 688         text->setCursorIntern(this, cursor.par(), cursor.pos());
 689         return need_update;
 690 }
 691
 692
 693 bool BufferView::ChangeRefsIfUnique(string const & from, string const & to)
 694 {
 695         // Check if the label 'from' appears more than once
 696         vector<string> labels = buffer()->getLabelList();
 697
 698         if (lyx::count(labels.begin(), labels.end(), from) > 1)
 699                 return false;
 700
 701         return ChangeInsets(Inset::REF_CODE, from, to);
 702 }
 703
 704
 705 bool BufferView::ChangeCitationsIfUnique(string const & from,
 706                                          string const & to)
 707 {
 708         typedef pair<string, string> StringPair;
 709
 710         vector<StringPair> keys = buffer()->getBibkeyList();
 711         if (count_if(keys.begin(), keys.end(),
 712                      lyx::equal_1st_in_pair<StringPair>(from))
 713             > 1)
 714                 return false;
 715
 716         return ChangeInsets(Inset::CITE_CODE, from, to);
 717 }
 718
 719
 720 UpdatableInset * BufferView::theLockingInset() const
 721 {
 722         // If NULL is not allowed we should put an Assert here. (Lgb)
 723         if (text)
 724                 return text->the_locking_inset;
 725         return 0;
 726 }
 727
 728
 729 void BufferView::theLockingInset(UpdatableInset * inset)
 730 {
 731         text->the_locking_inset = inset;
 732 }
 733
 734
 735 LyXText * BufferView::getLyXText() const
 736 {
 737         if (theLockingInset()) {
 738                 LyXText * txt = theLockingInset()->getLyXText(this, true);
 739                 if (txt)
 740                         return txt;
 741         }
 742         return text;
 743 }
 744
 745
 746 LyXText * BufferView::getParentText(Inset * inset) const
 747 {
 748         if (inset->owner()) {
 749                 LyXText * txt = inset->getLyXText(this);
 750                 inset = inset->owner();
 751                 while (inset && inset->getLyXText(this) == txt)
 752                         inset = inset->owner();
 753                 if (inset)
 754                         return inset->getLyXText(this);
 755         }
 756         return text;
 757 }
 758
 759
 760 Language const * BufferView::getParentLanguage(Inset * inset) const
 761 {
 762         LyXText * text = getParentText(inset);
 763         return text->cursor.par()->getFontSettings(buffer()->params,
 764                                                    text->cursor.pos()).language();
 765 }