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                 InsetList::iterator pit = par->insetlist.begin();
 195                 InsetList::iterator pend = par->insetlist.end();
 196
 197                 while (pit != pend) {
 198                         if (pit.getInset()->autoDelete()) {
 199                                 removed = true;
 200                                 pos_type const pos = pit.getPos();
 201
 202                                 par->erase(pos);
 203                                 // We just invalidated par's inset iterators so
 204                                 // we get the next valid iterator position
 205                                 pit = par->insetlist.insetIterator(pos);
 206                                 // and ensure we have a valid end iterator.
 207                                 pend = par->insetlist.end();
 208
 209                                 if (cursor_par == par) {
 210                                         // update the saved cursor position
 211                                         if (cursor_pos > pos)
 212                                                 --cursor_pos;
 213                                 }
 214                         } else {
 215                                 ++pit;
 216                         }
 217                 }
 218                 if (removed) {
 219                         found = true;
 220                         text->redoParagraph(this);
 221                 }
 222         }
 223
 224         // It is possible that the last line is empty if it was cursor_par
 225         // and/or only had an error inset on it.  So we set the cursor to the
 226         // start of the doc to force its removal and ensure a valid saved cursor
 227         if (text->setCursor(this, text->ownerParagraph(), 0)
 228             && 0 == cursor_par_next) {
 229                 cursor_par = cursor_par_prev;
 230                 cursor_pos = cursor_par->size();
 231         } else if (cursor_pos > cursor_par->size()) {
 232                 // Some C-Enter lines were removed by the setCursor call which
 233                 // then invalidated cursor_pos. It could still be "wrong" because
 234                 // the cursor may appear to have jumped but since we collapsed
 235                 // some C-Enter lines this should be a reasonable compromise.
 236                 cursor_pos = cursor_par->size();
 237         }
 238
 239         // restore the original cursor in its corrected location.
 240         text->setCursorIntern(this, cursor_par, cursor_pos);
 241
 242         return found;
 243 }
 244
 245
 246 void BufferView::insertErrors(TeXErrors & terr)
 247 {
 248         // Save the cursor position
 249         LyXCursor cursor = text->cursor;
 250
 251         TeXErrors::Errors::const_iterator cit = terr.begin();
 252         TeXErrors::Errors::const_iterator end = terr.end();
 253         for (; cit != end; ++cit) {
 254                 string const desctext(cit->error_desc);
 255                 string const errortext(cit->error_text);
 256                 string const msgtxt = desctext + '\n' + errortext;
 257                 int const errorrow = cit->error_in_line;
 258
 259                 // Insert error string for row number
 260                 int tmpid = -1;
 261                 int tmppos = -1;
 262
 263                 if (buffer()->texrow.getIdFromRow(errorrow, tmpid, tmppos)) {
 264                         buffer()->texrow.increasePos(tmpid, tmppos);
 265                 }
 266
 267                 Paragraph * texrowpar = 0;
 268
 269                 if (tmpid == -1) {
 270                         texrowpar = text->ownerParagraph();
 271                         tmppos = 0;
 272                 } else {
 273                         texrowpar = buffer()->getParFromID(tmpid);
 274                 }
 275
 276                 if (texrowpar == 0)
 277                         continue;
 278
 279                 InsetError * new_inset = new InsetError(msgtxt);
 280                 text->setCursorIntern(this, texrowpar, tmppos);
 281                 text->insertInset(this, new_inset);
 282                 text->fullRebreak(this);
 283         }
 284         // Restore the cursor position
 285         text->setCursorIntern(this, cursor.par(), cursor.pos());
 286 }
 287
 288
 289 void BufferView::setCursorFromRow(int row)
 290 {
 291         int tmpid = -1;
 292         int tmppos = -1;
 293
 294         buffer()->texrow.getIdFromRow(row, tmpid, tmppos);
 295
 296         Paragraph * texrowpar;
 297
 298         if (tmpid == -1) {
 299                 texrowpar = text->ownerParagraph();
 300                 tmppos = 0;
 301         } else {
 302                 texrowpar = buffer()->getParFromID(tmpid);
 303         }
 304         text->setCursor(this, texrowpar, tmppos);
 305 }
 306
 307
 308 bool BufferView::insertInset(Inset * inset, string const & lout)
 309 {
 310         return pimpl_->insertInset(inset, lout);
 311 }
 312
 313
 314 /* This is also a buffer property (ale) */
 315 // Not so sure about that. a goto Label function can not be buffer local, just
 316 // think how this will work in a multiwindo/buffer environment, all the
 317 // cursors in all the views showing this buffer will move. (Lgb)
 318 // OK, then no cursor action should be allowed in buffer. (ale)
 319 bool BufferView::gotoLabel(string const & label)
 320
 321 {
 322         for (Buffer::inset_iterator it = buffer()->inset_iterator_begin();
 323              it != buffer()->inset_iterator_end(); ++it) {
 324                 vector<string> labels = (*it)->getLabelList();
 325                 if (find(labels.begin(),labels.end(),label)
 326                      != labels.end()) {
 327                         beforeChange(text);
 328                         text->setCursor(this, it.getPar(), it.getPos());
 329                         text->selection.cursor = text->cursor;
 330                         update(text, BufferView::SELECT|BufferView::FITCUR);
 331                         return true;
 332                 }
 333         }
 334         return false;
 335 }
 336
 337
 338 void BufferView::menuUndo()
 339 {
 340         if (!available())
 341                 return;
 342
 343         owner()->message(_("Undo"));
 344         hideCursor();
 345         beforeChange(text);
 346         update(text, BufferView::SELECT|BufferView::FITCUR);
 347         if (!textUndo(this))
 348                 owner()->message(_("No further undo information"));
 349         else
 350                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 351         switchKeyMap();
 352 }
 353
 354
 355 void BufferView::menuRedo()
 356 {
 357         if (!available())
 358                 return;
 359
 360         owner()->message(_("Redo"));
 361         hideCursor();
 362         beforeChange(text);
 363         update(text, BufferView::SELECT|BufferView::FITCUR);
 364         if (!textRedo(this))
 365                 owner()->message(_("No further redo information"));
 366         else
 367                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 368         switchKeyMap();
 369 }
 370
 371
 372 void BufferView::copyEnvironment()
 373 {
 374         if (available()) {
 375                 text->copyEnvironmentType();
 376                 owner()->message(_("Paragraph environment type copied"));
 377         }
 378 }
 379
 380
 381 void BufferView::pasteEnvironment()
 382 {
 383         if (available()) {
 384                 text->pasteEnvironmentType(this);
 385                 owner()->message(_("Paragraph environment type set"));
 386                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 387         }
 388 }
 389
 390
 391 void BufferView::copy()
 392 {
 393         if (available()) {
 394                 getLyXText()->copySelection(this);
 395                 owner()->message(_("Copy"));
 396         }
 397 }
 398
 399
 400 void BufferView::cut(bool realcut)
 401 {
 402         if (available()) {
 403                 hideCursor();
 404                 update(text, BufferView::SELECT|BufferView::FITCUR);
 405                 text->cutSelection(this, true, realcut);
 406                 update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 407                 owner()->message(_("Cut"));
 408         }
 409 }
 410
 411
 412 void BufferView::paste()
 413 {
 414         if (!available())
 415                 return;
 416
 417         owner()->message(_("Paste"));
 418
 419         hideCursor();
 420         // clear the selection
 421         toggleSelection();
 422         text->clearSelection();
 423         update(text, BufferView::SELECT|BufferView::FITCUR);
 424
 425         // paste
 426         text->pasteSelection(this);
 427         // bug 393
 428         text->clearSelection();
 429         update(text, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 430 // why fake a selection only I think it should be a real one and not only
 431 // a painted one (Jug 20020318).
 432 #if 0
 433         // clear the selection
 434         toggleSelection();
 435         text->clearSelection();
 436         update(text, BufferView::SELECT|BufferView::FITCUR);
 437 #endif
 438 }
 439
 440
 441 /* these functions are for the spellchecker */
 442 WordLangTuple const BufferView::nextWord(float & value)
 443 {
 444         if (!available()) {
 445                 value = 1;
 446                 return WordLangTuple();
 447         }
 448
 449         return text->selectNextWordToSpellcheck(this, value);
 450 }
 451
 452
 453 void BufferView::selectLastWord()
 454 {
 455         if (!available()) return;
 456
 457         LyXCursor cur = text->selection.cursor;
 458         hideCursor();
 459         beforeChange(text);
 460         text->selection.cursor = cur;
 461         text->selectSelectedWord(this);
 462         toggleSelection(false);
 463         update(text, BufferView::SELECT|BufferView::FITCUR);
 464 }
 465
 466
 467 void BufferView::endOfSpellCheck()
 468 {
 469         if (!available()) return;
 470
 471         hideCursor();
 472         beforeChange(text);
 473         text->selectSelectedWord(this);
 474         text->clearSelection();
 475         update(text, BufferView::SELECT|BufferView::FITCUR);
 476 }
 477
 478
 479 void BufferView::replaceWord(string const & replacestring)
 480 {
 481         if (!available()) return;
 482
 483         LyXText * tt = getLyXText();
 484         hideCursor();
 485         update(tt, BufferView::SELECT|BufferView::FITCUR);
 486
 487         /* clear the selection (if there is any) */
 488         toggleSelection(false);
 489         update(tt, BufferView::SELECT|BufferView::FITCUR);
 490
 491         /* clear the selection (if there is any) */
 492         toggleSelection(false);
 493         tt->replaceSelectionWithString(this, replacestring);
 494
 495         tt->setSelectionOverString(this, replacestring);
 496
 497         // Go back so that replacement string is also spellchecked
 498         for (string::size_type i = 0; i < replacestring.length() + 1; ++i) {
 499                 tt->cursorLeft(this);
 500         }
 501         update(tt, BufferView::SELECT|BufferView::FITCUR|BufferView::CHANGE);
 502 }
 503 // End of spellchecker stuff
 504
 505
 506 bool BufferView::lockInset(UpdatableInset * inset)
 507 {
 508         if (!inset)
 509                 return false;
 510         // don't relock if we're already locked
 511         if (theLockingInset() == inset)
 512                 return true;
 513         if (!theLockingInset()) {
 514                 // first check if it's the inset under the cursor we want lock
 515                 // should be most of the time
 516                 char const c = text->cursor.par()->getChar(text->cursor.pos());
 517                 if (c == Paragraph::META_INSET) {
 518                         Inset * in = text->cursor.par()->getInset(text->cursor.pos());
 519                         if (inset == in) {
 520                                 theLockingInset(inset);
 521                                 return true;
 522                         }
 523                 }
 524                 // Then do a deep look of the inset and lock the right one
 525                 Paragraph * par = buffer()->paragraph;
 526                 int const id = inset->id();
 527                 while (par) {
 528                         InsetList::iterator it =
 529                                 par->insetlist.begin();
 530                         InsetList::iterator const end =
 531                                 par->insetlist.end();
 532                         for (; it != end; ++it) {
 533                                 if (it.getInset() == inset) {
 534                                         text->setCursorIntern(this, par, it.getPos());
 535                                         theLockingInset(inset);
 536                                         return true;
 537                                 }
 538                                 if (it.getInset()->getInsetFromID(id)) {
 539                                         text->setCursorIntern(this, par, it.getPos());
 540                                         it.getInset()->edit(this);
 541                                         return theLockingInset()->lockInsetInInset(this, inset);
 542                                 }
 543                         }
 544                         par = par->next();
 545                 }
 546                 return false;
 547         }
 548         return theLockingInset()->lockInsetInInset(this, inset);
 549 }
 550
 551
 552 void BufferView::showLockedInsetCursor(int x, int y, int asc, int desc)
 553 {
 554         if (available() && theLockingInset() && !theLockingInset()->nodraw()) {
 555                 LyXCursor cursor = text->cursor;
 556                 Inset * locking_inset = theLockingInset()->getLockingInset();
 557
 558                 if ((cursor.pos() - 1 >= 0) &&
 559                     cursor.par()->isInset(cursor.pos() - 1) &&
 560                     (cursor.par()->getInset(cursor.pos() - 1) ==
 561                      locking_inset))
 562                         text->setCursor(this, cursor,
 563                                         cursor.par(), cursor.pos() - 1);
 564                 LyXScreen::Cursor_Shape shape = LyXScreen::BAR_SHAPE;
 565                 LyXText * txt = getLyXText();
 566                 if (locking_inset->isTextInset() &&
 567                     locking_inset->lyxCode() != Inset::ERT_CODE &&
 568                     (txt->real_current_font.language() !=
 569                      buffer()->params.language
 570                      || txt->real_current_font.isVisibleRightToLeft()
 571                      != buffer()->params.language->RightToLeft()))
 572                         shape = (txt->real_current_font.isVisibleRightToLeft())
 573                                 ? LyXScreen::REVERSED_L_SHAPE
 574                                 : LyXScreen::L_SHAPE;
 575                 y += cursor.iy() + theLockingInset()->insetInInsetY();
 576                 screen().showManualCursor(text, x, y, asc, desc,
 577                                                   shape);
 578         }
 579 }
 580
 581
 582 void BufferView::hideLockedInsetCursor()
 583 {
 584         if (theLockingInset() && available()) {
 585                 screen().hideCursor();
 586         }
 587 }
 588
 589
 590 bool BufferView::fitLockedInsetCursor(int x, int y, int asc, int desc)
 591 {
 592         if (theLockingInset() && available()) {
 593                 y += text->cursor.iy() + theLockingInset()->insetInInsetY();
 594                 if (screen().fitManualCursor(this, text, x, y, asc, desc)) {
 595                         updateScrollbar();
 596                         return true;
 597                 }
 598         }
 599         return false;
 600 }
 601
 602
 603 int BufferView::unlockInset(UpdatableInset * inset)
 604 {
 605         if (!inset)
 606                 return 0;
 607         if (inset && theLockingInset() == inset) {
 608                 inset->insetUnlock(this);
 609                 theLockingInset(0);
 610                 // make sure we update the combo !
 611                 owner()->setLayout(getLyXText()->cursor.par()->layout()->name());
 612                 // Tell the paragraph dialog that we changed paragraph
 613                 owner()->getDialogs()->updateParagraph();
 614                 finishUndo();
 615                 return 0;
 616         } else if (inset && theLockingInset() &&
 617                    theLockingInset()->unlockInsetInInset(this, inset)) {
 618                 // Tell the paragraph dialog that we changed paragraph
 619                 owner()->getDialogs()->updateParagraph();
 620                 // owner inset has updated the layout combo
 621                 finishUndo();
 622                 return 0;
 623         }
 624         return bufferlist.unlockInset(inset);
 625 }
 626
 627
 628 void BufferView::lockedInsetStoreUndo(Undo::undo_kind kind)
 629 {
 630         if (!theLockingInset())
 631                 return; // shouldn't happen
 632         if (kind == Undo::EDIT) // in this case insets would not be stored!
 633                 kind = Undo::FINISH;
 634         setUndo(this, kind,
 635                 text->cursor.par(),
 636                 text->cursor.par()->next());
 637 }
 638
 639
 640 void BufferView::updateInset(Inset * inset, bool mark_dirty)
 641 {
 642         pimpl_->updateInset(inset, mark_dirty);
 643 }
 644
 645
 646 bool BufferView::ChangeInsets(Inset::Code code,
 647                               string const & from, string const & to)
 648 {
 649         bool need_update = false;
 650         LyXCursor cursor = text->cursor;
 651         LyXCursor tmpcursor = cursor;
 652         cursor.par(tmpcursor.par());
 653         cursor.pos(tmpcursor.pos());
 654
 655         ParIterator end = buffer()->par_iterator_end();
 656         for (ParIterator it = buffer()->par_iterator_begin();
 657              it != end; ++it) {
 658                 Paragraph * par = *it;
 659                 bool changed_inset = false;
 660                 for (InsetList::iterator it2 = par->insetlist.begin();
 661                      it2 != par->insetlist.end(); ++it2) {
 662                         if (it2.getInset()->lyxCode() == code) {
 663                                 InsetCommand * inset = static_cast<InsetCommand *>(it2.getInset());
 664                                 if (inset->getContents() == from) {
 665                                         inset->setContents(to);
 666                                         changed_inset = true;
 667                                 }
 668                         }
 669                 }
 670                 if (changed_inset) {
 671                         need_update = true;
 672
 673                         // FIXME
 674
 675                         // The test it.size()==1 was needed to prevent crashes.
 676                         // How to set the cursor corretly when it.size()>1 ??
 677                         if (it.size() == 1) {
 678                                 text->setCursorIntern(this, par, 0);
 679                                 text->redoParagraphs(this, text->cursor,
 680                                                      text->cursor.par()->next());
 681                                 text->fullRebreak(this);
 682                         }
 683                 }
 684         }
 685         text->setCursorIntern(this, cursor.par(), cursor.pos());
 686         return need_update;
 687 }
 688
 689
 690 bool BufferView::ChangeRefsIfUnique(string const & from, string const & to)
 691 {
 692         // Check if the label 'from' appears more than once
 693         vector<string> labels = buffer()->getLabelList();
 694
 695         if (lyx::count(labels.begin(), labels.end(), from) > 1)
 696                 return false;
 697
 698         return ChangeInsets(Inset::REF_CODE, from, to);
 699 }
 700
 701
 702 bool BufferView::ChangeCitationsIfUnique(string const & from,
 703                                          string const & to)
 704 {
 705         typedef pair<string, string> StringPair;
 706
 707         vector<StringPair> keys = buffer()->getBibkeyList();
 708         if (count_if(keys.begin(), keys.end(),
 709                      lyx::equal_1st_in_pair<StringPair>(from))
 710             > 1)
 711                 return false;
 712
 713         return ChangeInsets(Inset::CITE_CODE, from, to);
 714 }
 715
 716
 717 UpdatableInset * BufferView::theLockingInset() const
 718 {
 719         // If NULL is not allowed we should put an Assert here. (Lgb)
 720         if (text)
 721                 return text->the_locking_inset;
 722         return 0;
 723 }
 724
 725
 726 void BufferView::theLockingInset(UpdatableInset * inset)
 727 {
 728         text->the_locking_inset = inset;
 729 }
 730
 731
 732 LyXText * BufferView::getLyXText() const
 733 {
 734         if (theLockingInset()) {
 735                 LyXText * txt = theLockingInset()->getLyXText(this, true);
 736                 if (txt)
 737                         return txt;
 738         }
 739         return text;
 740 }
 741
 742
 743 LyXText * BufferView::getParentText(Inset * inset) const
 744 {
 745         if (inset->owner()) {
 746                 LyXText * txt = inset->getLyXText(this);
 747                 inset = inset->owner();
 748                 while (inset && inset->getLyXText(this) == txt)
 749                         inset = inset->owner();
 750                 if (inset)
 751                         return inset->getLyXText(this);
 752         }
 753         return text;
 754 }
 755
 756
 757 Language const * BufferView::getParentLanguage(Inset * inset) const
 758 {
 759         LyXText * text = getParentText(inset);
 760         return text->cursor.par()->getFontSettings(buffer()->params,
 761                                                    text->cursor.pos()).language();
 762 }