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