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                 owner()->message(_("Undo"));
 341                 hideCursor();
 342                 beforeChange(text);
 343                 update(text, BufferView::SELECT|BufferView::FITCUR);
 344                 if (!textUndo(this))
 345                         owner()->message(_("No further undo information"));
 346                 else
 347                         update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 348                 switchKeyMap();
 349         }
 350 }
 351
 352
 353 void BufferView::menuRedo()
 354 {
 355 #if 0 // this should not be here (Jug 20011206)
 356         if (theLockingInset()) {
 357                 owner()->message(_("Redo not yet supported in math mode"));
 358                 return;
 359         }
 360 #endif
 361
 362         if (available()) {
 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
 376 void BufferView::copyEnvironment()
 377 {
 378         if (available()) {
 379                 text->copyEnvironmentType();
 380                 owner()->message(_("Paragraph environment type copied"));
 381         }
 382 }
 383
 384
 385 void BufferView::pasteEnvironment()
 386 {
 387         if (available()) {
 388                 text->pasteEnvironmentType(this);
 389                 owner()->message(_("Paragraph environment type set"));
 390                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 391         }
 392 }
 393
 394
 395 void BufferView::copy()
 396 {
 397         if (available()) {
 398                 getLyXText()->copySelection(this);
 399                 owner()->message(_("Copy"));
 400         }
 401 }
 402
 403
 404 void BufferView::cut(bool realcut)
 405 {
 406         if (available()) {
 407                 hideCursor();
 408                 update(text, BufferView::SELECT|BufferView::FITCUR);
 409                 text->cutSelection(this, true, realcut);
 410                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 411                 owner()->message(_("Cut"));
 412         }
 413 }
 414
 415
 416 void BufferView::paste()
 417 {
 418         if (!available())
 419                 return;
 420
 421         owner()->message(_("Paste"));
 422
 423         hideCursor();
 424         // clear the selection
 425         toggleSelection();
 426         text->clearSelection();
 427         update(text, BufferView::SELECT|BufferView::FITCUR);
 428
 429         // paste
 430         text->pasteSelection(this);
 431         // bug 393
 432         text->clearSelection();
 433         update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 434 // why fake a selection only I think it should be a real one and not only
 435 // a painted one (Jug 20020318).
 436 #if 0
 437         // clear the selection
 438         toggleSelection();
 439         text->clearSelection();
 440         update(text, BufferView::SELECT|BufferView::FITCUR);
 441 #endif
 442 }
 443
 444
 445 /* these functions are for the spellchecker */
 446 string const BufferView::nextWord(float & value)
 447 {
 448         if (!available()) {
 449                 value = 1;
 450                 return string();
 451         }
 452
 453         return text->selectNextWordToSpellcheck(this, value);
 454 }
 455
 456
 457 void BufferView::selectLastWord()
 458 {
 459         if (!available()) return;
 460
 461         LyXCursor cur = text->selection.cursor;
 462         hideCursor();
 463         beforeChange(text);
 464         text->selection.cursor = cur;
 465         text->selectSelectedWord(this);
 466         toggleSelection(false);
 467         update(text, BufferView::SELECT|BufferView::FITCUR);
 468 }
 469
 470
 471 void BufferView::endOfSpellCheck()
 472 {
 473         if (!available()) return;
 474
 475         hideCursor();
 476         beforeChange(text);
 477         text->selectSelectedWord(this);
 478         text->clearSelection();
 479         update(text, BufferView::SELECT|BufferView::FITCUR);
 480 }
 481
 482
 483 void BufferView::replaceWord(string const & replacestring)
 484 {
 485         if (!available()) return;
 486
 487         LyXText * tt = getLyXText();
 488         hideCursor();
 489         update(tt, BufferView::SELECT|BufferView::FITCUR);
 490
 491         /* clear the selection (if there is any) */
 492         toggleSelection(false);
 493         update(tt, BufferView::SELECT|BufferView::FITCUR);
 494
 495         /* clear the selection (if there is any) */
 496         toggleSelection(false);
 497         tt->replaceSelectionWithString(this, replacestring);
 498
 499         tt->setSelectionOverString(this, replacestring);
 500
 501         // Go back so that replacement string is also spellchecked
 502         for (string::size_type i = 0; i < replacestring.length() + 1; ++i) {
 503                 tt->cursorLeft(this);
 504         }
 505         update(tt, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 506 }
 507 // End of spellchecker stuff
 508
 509
 510 bool BufferView::lockInset(UpdatableInset * inset)
 511 {
 512         if (!inset)
 513                 return false;
 514         // don't relock if we're already locked
 515         if (theLockingInset() == inset)
 516                 return true;
 517         if (!theLockingInset()) {
 518                 // first check if it's the inset under the cursor we want lock
 519                 // should be most of the time
 520                 char const c = text->cursor.par()->getChar(text->cursor.pos());
 521                 if (c == Paragraph::META_INSET) {
 522                         Inset * in = text->cursor.par()->getInset(text->cursor.pos());
 523                         if (inset == in) {
 524                                 theLockingInset(inset);
 525                                 return true;
 526                         }
 527                 }
 528                 // Then do a deep look of the inset and lock the right one
 529                 Paragraph * par = buffer()->paragraph;
 530                 int const id = inset->id();
 531                 while(par) {
 532                         Paragraph::inset_iterator it =
 533                                 par->inset_iterator_begin();
 534                         Paragraph::inset_iterator const end =
 535                                 par->inset_iterator_end();
 536                         for (; it != end; ++it) {
 537                                 if ((*it) == inset) {
 538                                         text->setCursorIntern(this, par, it.getPos());
 539                                         theLockingInset(inset);
 540                                         return true;
 541                                 }
 542                                 if ((*it)->getInsetFromID(id)) {
 543                                         text->setCursorIntern(this, par, it.getPos());
 544                                         (*it)->edit(this);
 545                                         return theLockingInset()->lockInsetInInset(this, inset);
 546                                 }
 547                         }
 548                         par = par->next();
 549                 }
 550                 return false;
 551         }
 552         return theLockingInset()->lockInsetInInset(this, inset);
 553 }
 554
 555
 556 void BufferView::showLockedInsetCursor(int x, int y, int asc, int desc)
 557 {
 558         if (available() && theLockingInset() && !theLockingInset()->nodraw()) {
 559                 LyXCursor cursor = text->cursor;
 560                 Inset * locking_inset = theLockingInset()->getLockingInset();
 561
 562                 if ((cursor.pos() - 1 >= 0) &&
 563                     cursor.par()->isInset(cursor.pos() - 1) &&
 564                     (cursor.par()->getInset(cursor.pos() - 1) ==
 565                      locking_inset))
 566                         text->setCursor(this, cursor,
 567                                         cursor.par(), cursor.pos() - 1);
 568                 LyXScreen::Cursor_Shape shape = LyXScreen::BAR_SHAPE;
 569                 LyXText * txt = getLyXText();
 570                 if (locking_inset->isTextInset() &&
 571                     locking_inset->lyxCode() != Inset::ERT_CODE &&
 572                     (txt->real_current_font.language() !=
 573                      buffer()->params.language
 574                      || txt->real_current_font.isVisibleRightToLeft()
 575                      != buffer()->params.language->RightToLeft()))
 576                         shape = (txt->real_current_font.isVisibleRightToLeft())
 577                                 ? LyXScreen::REVERSED_L_SHAPE
 578                                 : LyXScreen::L_SHAPE;
 579                 y += cursor.iy() + theLockingInset()->insetInInsetY();
 580                 screen().showManualCursor(text, x, y, asc, desc,
 581                                                   shape);
 582         }
 583 }
 584
 585
 586 void BufferView::hideLockedInsetCursor()
 587 {
 588         if (theLockingInset() && available()) {
 589                 screen().hideCursor();
 590         }
 591 }
 592
 593
 594 bool BufferView::fitLockedInsetCursor(int x, int y, int asc, int desc)
 595 {
 596         if (theLockingInset() && available()) {
 597                 y += text->cursor.iy() + theLockingInset()->insetInInsetY();
 598                 if (screen().fitManualCursor(this, text, x, y, asc, desc)) {
 599                         updateScrollbar();
 600                         return true;
 601                 }
 602         }
 603         return false;
 604 }
 605
 606
 607 int BufferView::unlockInset(UpdatableInset * inset)
 608 {
 609         if (!inset)
 610                 return 0;
 611         if (inset && theLockingInset() == inset) {
 612                 inset->insetUnlock(this);
 613                 theLockingInset(0);
 614                 // make sure we update the combo !
 615                 owner()->setLayout(getLyXText()->cursor.par()->layout()->name());
 616                 // Tell the paragraph dialog that we changed paragraph
 617                 owner()->getDialogs()->updateParagraph();
 618                 finishUndo();
 619                 return 0;
 620         } else if (inset && theLockingInset() &&
 621                    theLockingInset()->unlockInsetInInset(this, inset)) {
 622                 // Tell the paragraph dialog that we changed paragraph
 623                 owner()->getDialogs()->updateParagraph();
 624                 // owner inset has updated the layout combo
 625                 finishUndo();
 626                 return 0;
 627         }
 628         return bufferlist.unlockInset(inset);
 629 }
 630
 631
 632 void BufferView::lockedInsetStoreUndo(Undo::undo_kind kind)
 633 {
 634         if (!theLockingInset())
 635                 return; // shouldn't happen
 636         if (kind == Undo::EDIT) // in this case insets would not be stored!
 637                 kind = Undo::FINISH;
 638         setUndo(this, kind,
 639                 text->cursor.par(),
 640                 text->cursor.par()->next());
 641 }
 642
 643
 644 void BufferView::updateInset(Inset * inset, bool mark_dirty)
 645 {
 646         pimpl_->updateInset(inset, mark_dirty);
 647 }
 648
 649
 650 bool BufferView::ChangeInsets(Inset::Code code,
 651                               string const & from, string const & to)
 652 {
 653         bool need_update = false;
 654         LyXCursor cursor = text->cursor;
 655         LyXCursor tmpcursor = cursor;
 656         cursor.par(tmpcursor.par());
 657         cursor.pos(tmpcursor.pos());
 658
 659         ParIterator end = buffer()->par_iterator_end();
 660         for (ParIterator it = buffer()->par_iterator_begin();
 661              it != end; ++it) {
 662                 Paragraph * par = *it;
 663                 bool changed_inset = false;
 664                 for (Paragraph::inset_iterator it2 = par->inset_iterator_begin();
 665                      it2 != par->inset_iterator_end(); ++it2) {
 666                         if ((*it2)->lyxCode() == code) {
 667                                 InsetCommand * inset = static_cast<InsetCommand *>(*it2);
 668                                 if (inset->getContents() == from) {
 669                                         inset->setContents(to);
 670                                         changed_inset = true;
 671                                 }
 672                         }
 673                 }
 674                 if (changed_inset) {
 675                         need_update = true;
 676
 677                         // FIXME
 678
 679                         // The test it.size()==1 was needed to prevent crashes.
 680                         // How to set the cursor corretly when it.size()>1 ??
 681                         if (it.size() == 1) {
 682                                 text->setCursorIntern(this, par, 0);
 683                                 text->redoParagraphs(this, text->cursor,
 684                                                      text->cursor.par()->next());
 685                                 text->fullRebreak(this);
 686                         }
 687                 }
 688         }
 689         text->setCursorIntern(this, cursor.par(), cursor.pos());
 690         return need_update;
 691 }
 692
 693
 694 bool BufferView::ChangeRefsIfUnique(string const & from, string const & to)
 695 {
 696         // Check if the label 'from' appears more than once
 697         vector<string> labels = buffer()->getLabelList();
 698
 699         if (lyx::count(labels.begin(), labels.end(), from) > 1)
 700                 return false;
 701
 702         return ChangeInsets(Inset::REF_CODE, from, to);
 703 }
 704
 705
 706 bool BufferView::ChangeCitationsIfUnique(string const & from,
 707                                          string const & to)
 708 {
 709         typedef pair<string, string> StringPair;
 710
 711         vector<StringPair> keys = buffer()->getBibkeyList();
 712         if (count_if(keys.begin(), keys.end(),
 713                      lyx::equal_1st_in_pair<StringPair>(from))
 714             > 1)
 715                 return false;
 716
 717         return ChangeInsets(Inset::CITE_CODE, from, to);
 718 }
 719
 720
 721 UpdatableInset * BufferView::theLockingInset() const
 722 {
 723         // If NULL is not allowed we should put an Assert here. (Lgb)
 724         if (text)
 725                 return text->the_locking_inset;
 726         return 0;
 727 }
 728
 729
 730 void BufferView::theLockingInset(UpdatableInset * inset)
 731 {
 732         text->the_locking_inset = inset;
 733 }
 734
 735
 736 LyXText * BufferView::getLyXText() const
 737 {
 738         if (theLockingInset()) {
 739                 LyXText * txt = theLockingInset()->getLyXText(this, true);
 740                 if (txt)
 741                         return txt;
 742         }
 743         return text;
 744 }
 745
 746
 747 LyXText * BufferView::getParentText(Inset * inset) const
 748 {
 749         if (inset->owner()) {
 750                 LyXText * txt = inset->getLyXText(this);
 751                 inset = inset->owner();
 752                 while (inset && inset->getLyXText(this) == txt)
 753                         inset = inset->owner();
 754                 if (inset)
 755                         return inset->getLyXText(this);
 756         }
 757         return text;
 758 }
 759
 760
 761 Language const * BufferView::getParentLanguage(Inset * inset) const
 762 {
 763         LyXText * text = getParentText(inset);
 764         return text->cursor.par()->getFontSettings(buffer()->params,
 765                                                    text->cursor.pos()).language();
 766 }