src/BufferView.C

   1 /**
   2  * \file BufferView.C
   3  * Copyright 1995-2002 the LyX Team
   4  * Read the file COPYING
   5  *
   6  * \author unknown
   7  * \author John Levon <moz@compsoc.man.ac.uk>
   8  */
   9
  10 #include <config.h>
  11
  12 #include "BufferView.h"
  13 #include "BufferView_pimpl.h"
  14
  15 #include "LaTeX.h"
  16 #include "ParagraphParameters.h"
  17 #include "WordLangTuple.h"
  18 #include "buffer.h"
  19 #include "bufferlist.h"
  20 #include "debug.h"
  21 #include "gettext.h"
  22 #include "iterators.h"
  23 #include "language.h"
  24 #include "lyxcursor.h"
  25 #include "lyxlex.h"
  26 #include "lyxtext.h"
  27 #include "undo_funcs.h"
  28 #include "changes.h"
  29 #include "paragraph_funcs.h"
  30
  31 #include "frontends/Alert.h"
  32 #include "frontends/Dialogs.h"
  33 #include "frontends/LyXView.h"
  34 #include "frontends/WorkArea.h"
  35 #include "frontends/screen.h"
  36
  37 #include "insets/insetcommand.h" // ChangeRefs
  38 #include "insets/inseterror.h"
  39 #include "insets/updatableinset.h"
  40
  41 #include "support/FileInfo.h"
  42 #include "support/filetools.h"
  43 #include "support/lyxfunctional.h" // equal_1st_in_pair
  44 #include "support/types.h"
  45 #include "support/lyxalgo.h" // lyx_count
  46
  47 #include <fstream>
  48
  49 extern BufferList bufferlist;
  50
  51 using lyx::pos_type;
  52
  53 using std::pair;
  54 using std::endl;
  55 using std::ifstream;
  56 using std::vector;
  57 using std::find;
  58 using std::count_if;
  59
  60
  61 BufferView::BufferView(LyXView * owner, int xpos, int ypos,
  62                        int width, int height)
  63         : pimpl_(new Pimpl(this, owner, xpos, ypos, width, height))
  64 {
  65         text = 0;
  66 }
  67
  68
  69 BufferView::~BufferView()
  70 {
  71         delete text;
  72         delete pimpl_;
  73 }
  74
  75
  76 Buffer * BufferView::buffer() const
  77 {
  78         return pimpl_->buffer_;
  79 }
  80
  81
  82 LyXScreen & BufferView::screen() const
  83 {
  84         return pimpl_->screen();
  85 }
  86
  87
  88 LyXView * BufferView::owner() const
  89 {
  90         return pimpl_->owner_;
  91 }
  92
  93
  94 Painter & BufferView::painter() const
  95 {
  96         return pimpl_->painter();
  97 }
  98
  99
 100 void BufferView::buffer(Buffer * b)
 101 {
 102         pimpl_->buffer(b);
 103 }
 104
 105
 106 void BufferView::reload()
 107 {
 108         string const fn = buffer()->fileName();
 109         if (bufferlist.close(buffer(), false))
 110                 buffer(bufferlist.loadLyXFile(fn));
 111 }
 112
 113
 114 void BufferView::resize()
 115 {
 116         if (pimpl_->buffer_) {
 117                 pimpl_->resizeCurrentBuffer();
 118         }
 119 }
 120
 121
 122 void BufferView::repaint()
 123 {
 124         pimpl_->repaint();
 125 }
 126
 127
 128 bool BufferView::fitCursor()
 129 {
 130         return pimpl_->fitCursor();
 131 }
 132
 133
 134 void BufferView::update()
 135 {
 136         pimpl_->update();
 137 }
 138
 139
 140 void BufferView::updateScrollbar()
 141 {
 142         pimpl_->updateScrollbar();
 143 }
 144
 145
 146 void BufferView::scrollDocView(int value)
 147 {
 148         pimpl_->scrollDocView(value);
 149 }
 150
 151
 152 void BufferView::redoCurrentBuffer()
 153 {
 154         pimpl_->redoCurrentBuffer();
 155 }
 156
 157
 158 bool BufferView::available() const
 159 {
 160         return pimpl_->available();
 161 }
 162
 163
 164 Change const BufferView::getCurrentChange()
 165 {
 166         return pimpl_->getCurrentChange();
 167 }
 168
 169
 170 void BufferView::beforeChange(LyXText * text)
 171 {
 172         pimpl_->beforeChange(text);
 173 }
 174
 175
 176 void BufferView::savePosition(unsigned int i)
 177 {
 178         pimpl_->savePosition(i);
 179 }
 180
 181
 182 void BufferView::restorePosition(unsigned int i)
 183 {
 184         pimpl_->restorePosition(i);
 185 }
 186
 187
 188 bool BufferView::isSavedPosition(unsigned int i)
 189 {
 190         return pimpl_->isSavedPosition(i);
 191 }
 192
 193
 194 void BufferView::update(LyXText * text, UpdateCodes f)
 195 {
 196         pimpl_->update(text, f);
 197 }
 198
 199
 200 void BufferView::update(UpdateCodes f)
 201 {
 202         pimpl_->update(f);
 203 }
 204
 205
 206 void BufferView::switchKeyMap()
 207 {
 208         pimpl_->switchKeyMap();
 209 }
 210
 211
 212 void BufferView::insetUnlock()
 213 {
 214         pimpl_->insetUnlock();
 215 }
 216
 217
 218 int BufferView::workWidth() const
 219 {
 220         return pimpl_->workarea().workWidth();
 221 }
 222
 223
 224 void BufferView::toggleSelection(bool b)
 225 {
 226         pimpl_->toggleSelection(b);
 227 }
 228
 229
 230 void BufferView::toggleToggle()
 231 {
 232         pimpl_->toggleToggle();
 233 }
 234
 235
 236 void BufferView::center()
 237 {
 238         pimpl_->center();
 239 }
 240
 241
 242 string const BufferView::getClipboard() const
 243 {
 244         return pimpl_->workarea().getClipboard();
 245 }
 246
 247
 248 void BufferView::stuffClipboard(string const & stuff) const
 249 {
 250         pimpl_->stuffClipboard(stuff);
 251 }
 252
 253
 254 BufferView::UpdateCodes operator|(BufferView::UpdateCodes uc1,
 255                                   BufferView::UpdateCodes uc2)
 256 {
 257         return static_cast<BufferView::UpdateCodes>
 258                 (static_cast<int>(uc1) | static_cast<int>(uc2));
 259 }
 260
 261
 262 bool BufferView::dispatch(FuncRequest const & ev)
 263 {
 264         return pimpl_->dispatch(ev);
 265 }
 266
 267
 268 void BufferView::scroll(int lines)
 269 {
 270         pimpl_->scroll(lines);
 271 }
 272
 273
 274 // Inserts a file into current document
 275 bool BufferView::insertLyXFile(string const & filen)
 276         //
 277         // Copyright CHT Software Service GmbH
 278         // Uwe C. Schroeder
 279         //
 280         // Insert a LyXformat - file into current buffer
 281         //
 282         // Moved from lyx_cb.C (Lgb)
 283 {
 284         if (filen.empty())
 285                 return false;
 286
 287         string const fname = MakeAbsPath(filen);
 288
 289         // check if file exist
 290         FileInfo const fi(fname);
 291
 292         if (!fi.readable()) {
 293                 string const file = MakeDisplayPath(fname, 50);
 294                 string const text =
 295                         bformat(_("The specified document\n%1$s\ncould not be read."), file);
 296                 Alert::error(_("Could not read document"), text);
 297                 return false;
 298         }
 299
 300         beforeChange(text);
 301
 302         ifstream ifs(fname.c_str());
 303         if (!ifs) {
 304                 string const file = MakeDisplayPath(fname, 50);
 305                 string const text =
 306                         bformat(_("Could not open the specified document %1$s\n"), file);
 307                 Alert::error(_("Could not open file"), text);
 308                 return false;
 309         }
 310
 311         int const c = ifs.peek();
 312
 313         LyXLex lex(0, 0);
 314         lex.setStream(ifs);
 315
 316         bool res = true;
 317
 318         if (c == '#') {
 319                 // FIXME: huh ? No we won't !
 320                 lyxerr[Debug::INFO] << "Will insert file with header" << endl;
 321                 res = buffer()->readFile(lex, fname, ParagraphList::iterator(text->cursor.par()));
 322         } else {
 323                 lyxerr[Debug::INFO] << "Will insert file without header"
 324                                     << endl;
 325                 res = buffer()->readBody(lex, ParagraphList::iterator(text->cursor.par()));
 326         }
 327
 328         resize();
 329         return res;
 330 }
 331
 332
 333 bool BufferView::removeAutoInsets()
 334 {
 335         // keep track of which pos and par the cursor was on
 336         Paragraph * cursor_par = &*text->cursor.par();
 337         Paragraph * cursor_par_prev = cursor_par ? cursor_par->previous() : 0;
 338         Paragraph * cursor_par_next = cursor_par ? cursor_par->next() : 0;
 339         pos_type cursor_pos = text->cursor.pos();
 340
 341         bool found = false;
 342
 343         // Trap the deletion of the paragraph the cursor is in.
 344         // Iterate until we find a paragraph that won't be immediately deleted.
 345         // In reality this should mean we only execute the body of the while
 346         // loop once at most.  However for safety we iterate rather than just
 347         // make this an if () conditional.
 348         while ((cursor_par_prev || cursor_par_next)
 349                && text->setCursor(
 350                                   cursor_par_prev ? cursor_par_prev : cursor_par_next,
 351                                   0)) {
 352                 // We just removed cursor_par so have to fix the "cursor"
 353                 if (cursor_par_prev) {
 354                         // '.' = cursor_par
 355                         //  a -> a.
 356                         // .
 357                         cursor_par = cursor_par_prev;
 358                         cursor_pos = cursor_par->size();
 359                 } else {
 360                         // .  -> .a
 361                         //  a
 362                         cursor_par = cursor_par_next;
 363                         cursor_pos = 0;
 364                 }
 365                 cursor_par_prev = cursor_par->previous();
 366                 cursor_par_next = cursor_par->next();
 367         }
 368
 369         // Iterate through the paragraphs removing autoDelete insets as we go.
 370         // If the paragraph ends up empty after all the autoDelete insets are
 371         // removed that paragraph will be removed by the next setCursor() call.
 372         ParIterator it = buffer()->par_iterator_begin();
 373         ParIterator end = buffer()->par_iterator_end();
 374         for (; it != end; ++it) {
 375                 Paragraph * par = *it;
 376                 Paragraph * par_prev = par ? par->previous() : 0;
 377                 bool removed = false;
 378
 379                 if (text->setCursor(par, 0)
 380                     && cursor_par == par_prev) {
 381                         // The previous setCursor line was deleted and that
 382                         // was the cursor_par line.  This can only happen if an
 383                         // error box was the sole item on cursor_par.
 384                         // It is possible for cursor_par_prev to be stray if
 385                         // the line it pointed to only had a error box on it
 386                         // so we have to set it to a known correct value.
 387                         // This is often the same value it already had.
 388                         cursor_par_prev = par->previous();
 389                         if (cursor_par_prev) {
 390                                 // '|' = par, '.' = cursor_par, 'E' = error box
 391                                 // First step below may occur before while{}
 392                                 //  a    |a      a     a     a.
 393                                 //  E -> .E -> |.E -> .  -> |b
 394                                 // .      b      b    |b
 395                                 //  b
 396                                 cursor_par = cursor_par_prev;
 397                                 cursor_pos = cursor_par_prev->size();
 398                                 cursor_par_prev = cursor_par->previous();
 399                                 // cursor_par_next remains the same
 400                         } else if (cursor_par_next) {
 401                                 // First step below may occur before while{}
 402                                 // .
 403                                 //  E -> |.E -> |.  -> . -> .|a
 404                                 //  a      a      a    |a
 405                                 cursor_par = cursor_par_next;
 406                                 cursor_pos = 0;
 407                                 // cursor_par_prev remains unset
 408                                 cursor_par_next = cursor_par->next();
 409                         } else {
 410                                 // I can't find a way to trigger this
 411                                 // so it should be unreachable code
 412                                 // unless the buffer is corrupted.
 413                                 lyxerr << "BufferView::removeAutoInsets() is bad\n";
 414                         }
 415                 }
 416
 417                 InsetList::iterator pit = par->insetlist.begin();
 418                 InsetList::iterator pend = par->insetlist.end();
 419
 420                 while (pit != pend) {
 421                         if (pit.getInset()->autoDelete()) {
 422                                 removed = true;
 423                                 pos_type const pos = pit.getPos();
 424
 425                                 par->erase(pos);
 426                                 // We just invalidated par's inset iterators so
 427                                 // we get the next valid iterator position
 428                                 pit = par->insetlist.insetIterator(pos);
 429                                 // and ensure we have a valid end iterator.
 430                                 pend = par->insetlist.end();
 431
 432                                 if (cursor_par == par) {
 433                                         // update the saved cursor position
 434                                         if (cursor_pos > pos)
 435                                                 --cursor_pos;
 436                                 }
 437                         } else {
 438                                 ++pit;
 439                         }
 440                 }
 441                 if (removed) {
 442                         found = true;
 443                         text->redoParagraph();
 444                 }
 445         }
 446
 447         // It is possible that the last line is empty if it was cursor_par
 448         // and/or only had an error inset on it.  So we set the cursor to the
 449         // start of the doc to force its removal and ensure a valid saved cursor
 450         if (text->setCursor(&*text->ownerParagraphs().begin(), 0)
 451             && 0 == cursor_par_next) {
 452                 cursor_par = cursor_par_prev;
 453                 cursor_pos = cursor_par->size();
 454         } else if (cursor_pos > cursor_par->size()) {
 455                 // Some C-Enter lines were removed by the setCursor call which
 456                 // then invalidated cursor_pos. It could still be "wrong" because
 457                 // the cursor may appear to have jumped but since we collapsed
 458                 // some C-Enter lines this should be a reasonable compromise.
 459                 cursor_pos = cursor_par->size();
 460         }
 461
 462         // restore the original cursor in its corrected location.
 463         text->setCursorIntern(cursor_par, cursor_pos);
 464
 465         return found;
 466 }
 467
 468
 469 void BufferView::showErrorList()
 470 {
 471         owner()->getDialogs().show("errorlist");
 472 }
 473
 474
 475 void BufferView::setCursorFromRow(int row)
 476 {
 477         int tmpid = -1;
 478         int tmppos = -1;
 479
 480         buffer()->texrow.getIdFromRow(row, tmpid, tmppos);
 481
 482         Paragraph * texrowpar;
 483
 484         if (tmpid == -1) {
 485                 texrowpar = &*text->ownerParagraphs().begin();
 486                 tmppos = 0;
 487         } else {
 488                 texrowpar = &*buffer()->getParFromID(tmpid);
 489         }
 490         text->setCursor(texrowpar, tmppos);
 491 }
 492
 493
 494 bool BufferView::insertInset(Inset * inset, string const & lout)
 495 {
 496         return pimpl_->insertInset(inset, lout);
 497 }
 498
 499
 500 void BufferView::gotoLabel(string const & label)
 501 {
 502         for (Buffer::inset_iterator it = buffer()->inset_iterator_begin();
 503              it != buffer()->inset_iterator_end(); ++it) {
 504                 vector<string> labels = it->getLabelList();
 505                 if (find(labels.begin(),labels.end(),label)
 506                      != labels.end()) {
 507                         beforeChange(text);
 508                         text->setCursor(it.getPar(), it.getPos());
 509                         text->selection.cursor = text->cursor;
 510                         update(text, BufferView::SELECT);
 511                         return;
 512                 }
 513         }
 514 }
 515
 516
 517 void BufferView::undo()
 518 {
 519         if (!available())
 520                 return;
 521
 522         owner()->message(_("Undo"));
 523         beforeChange(text);
 524         update(text, BufferView::SELECT);
 525         if (!textUndo(this))
 526                 owner()->message(_("No further undo information"));
 527         else
 528                 update(text, BufferView::SELECT);
 529         switchKeyMap();
 530 }
 531
 532
 533 void BufferView::redo()
 534 {
 535         if (!available())
 536                 return;
 537
 538         owner()->message(_("Redo"));
 539         beforeChange(text);
 540         update(text, BufferView::SELECT);
 541         if (!textRedo(this))
 542                 owner()->message(_("No further redo information"));
 543         else
 544                 update(text, BufferView::SELECT);
 545         switchKeyMap();
 546 }
 547
 548
 549 // these functions are for the spellchecker
 550 WordLangTuple const BufferView::nextWord(float & value)
 551 {
 552         if (!available()) {
 553                 value = 1;
 554                 return WordLangTuple();
 555         }
 556
 557         return text->selectNextWordToSpellcheck(value);
 558 }
 559
 560
 561 void BufferView::selectLastWord()
 562 {
 563         if (!available())
 564                 return;
 565
 566         LyXCursor cur = text->selection.cursor;
 567         beforeChange(text);
 568         text->selection.cursor = cur;
 569         text->selectSelectedWord();
 570         toggleSelection(false);
 571         update(text, BufferView::SELECT);
 572 }
 573
 574
 575 void BufferView::endOfSpellCheck()
 576 {
 577         if (!available()) return;
 578
 579         beforeChange(text);
 580         text->selectSelectedWord();
 581         text->clearSelection();
 582         update(text, BufferView::SELECT);
 583 }
 584
 585
 586 void BufferView::replaceWord(string const & replacestring)
 587 {
 588         if (!available())
 589                 return;
 590
 591         LyXText * tt = getLyXText();
 592         update(tt, BufferView::SELECT);
 593
 594         // clear the selection (if there is any)
 595         toggleSelection(false);
 596         update(tt, BufferView::SELECT);
 597
 598         // clear the selection (if there is any)
 599         toggleSelection(false);
 600         tt->replaceSelectionWithString(replacestring);
 601
 602         tt->setSelectionRange(replacestring.length());
 603
 604         // Go back so that replacement string is also spellchecked
 605         for (string::size_type i = 0; i < replacestring.length() + 1; ++i) {
 606                 tt->cursorLeft(this);
 607         }
 608         update(tt, BufferView::SELECT);
 609
 610         // FIXME: should be done through LFUN
 611         buffer()->markDirty();
 612         fitCursor();
 613 }
 614 // End of spellchecker stuff
 615
 616
 617 bool BufferView::lockInset(UpdatableInset * inset)
 618 {
 619         if (!inset)
 620                 return false;
 621         // don't relock if we're already locked
 622         if (theLockingInset() == inset)
 623                 return true;
 624         if (!theLockingInset()) {
 625                 // first check if it's the inset under the cursor we want lock
 626                 // should be most of the time
 627                 if (text->cursor.pos() < text->cursor.par()->size()
 628                     && text->cursor.par()->getChar(text->cursor.pos()) ==
 629                     Paragraph::META_INSET) {
 630                         Inset * in = text->cursor.par()->getInset(text->cursor.pos());
 631                         if (inset == in) {
 632                                 theLockingInset(inset);
 633                                 return true;
 634                         }
 635                 }
 636                 // Then do a deep look of the inset and lock the right one
 637                 int const id = inset->id();
 638                 ParagraphList::iterator pit = buffer()->paragraphs.begin();
 639                 ParagraphList::iterator pend = buffer()->paragraphs.end();
 640                 for (; pit != pend; ++pit) {
 641                         InsetList::iterator it = pit->insetlist.begin();
 642                         InsetList::iterator end = pit->insetlist.end();
 643                         for (; it != end; ++it) {
 644                                 if (it.getInset() == inset) {
 645                                         text->setCursorIntern(pit, it.getPos());
 646                                         theLockingInset(inset);
 647                                         return true;
 648                                 }
 649                                 if (it.getInset()->getInsetFromID(id)) {
 650                                         text->setCursorIntern(pit, it.getPos());
 651                                         FuncRequest cmd(this, LFUN_INSET_EDIT, "left");
 652                                         it.getInset()->localDispatch(cmd);
 653                                         return theLockingInset()->lockInsetInInset(this, inset);
 654                                 }
 655                         }
 656                 }
 657                 return false;
 658         }
 659         return theLockingInset()->lockInsetInInset(this, inset);
 660 }
 661
 662
 663 bool BufferView::fitLockedInsetCursor(int x, int y, int asc, int desc)
 664 {
 665         if (theLockingInset() && available()) {
 666                 y += text->cursor.iy() + theLockingInset()->insetInInsetY();
 667                 if (screen().fitManualCursor(this, text, x, y, asc, desc)) {
 668                         updateScrollbar();
 669                         return true;
 670                 }
 671         }
 672         return false;
 673 }
 674
 675
 676 void BufferView::hideCursor()
 677 {
 678         screen().hideCursor();
 679 }
 680
 681
 682 int BufferView::unlockInset(UpdatableInset * inset)
 683 {
 684         if (!inset)
 685                 return 0;
 686         if (inset && theLockingInset() == inset) {
 687                 inset->insetUnlock(this);
 688                 theLockingInset(0);
 689                 // make sure we update the combo !
 690                 owner()->setLayout(getLyXText()->cursor.par()->layout()->name());
 691                 // Tell the paragraph dialog that we changed paragraph
 692                 dispatch(FuncRequest(LFUN_PARAGRAPH_UPDATE));
 693                 finishUndo();
 694                 return 0;
 695         } else if (inset && theLockingInset() &&
 696                    theLockingInset()->unlockInsetInInset(this, inset)) {
 697                 // Tell the paragraph dialog that we changed paragraph
 698                 dispatch(FuncRequest(LFUN_PARAGRAPH_UPDATE));
 699                 // owner inset has updated the layout combo
 700                 finishUndo();
 701                 return 0;
 702         }
 703         return 1;
 704 }
 705
 706
 707 void BufferView::lockedInsetStoreUndo(Undo::undo_kind kind)
 708 {
 709         if (!theLockingInset())
 710                 return; // shouldn't happen
 711         if (kind == Undo::EDIT) // in this case insets would not be stored!
 712                 kind = Undo::FINISH;
 713         setUndo(this, kind,
 714                 text->cursor.par(),
 715                 boost::next(text->cursor.par()));
 716 }
 717
 718
 719 void BufferView::updateInset(Inset * inset)
 720 {
 721         pimpl_->updateInset(inset);
 722 }
 723
 724
 725 bool BufferView::ChangeInsets(Inset::Code code,
 726                               string const & from, string const & to)
 727 {
 728         bool need_update = false;
 729         LyXCursor cursor = text->cursor;
 730         LyXCursor tmpcursor = cursor;
 731         cursor.par(tmpcursor.par());
 732         cursor.pos(tmpcursor.pos());
 733
 734         ParIterator end = buffer()->par_iterator_end();
 735         for (ParIterator it = buffer()->par_iterator_begin();
 736              it != end; ++it) {
 737                 Paragraph * par = *it;
 738                 bool changed_inset = false;
 739                 for (InsetList::iterator it2 = par->insetlist.begin();
 740                      it2 != par->insetlist.end(); ++it2) {
 741                         if (it2.getInset()->lyxCode() == code) {
 742                                 InsetCommand * inset = static_cast<InsetCommand *>(it2.getInset());
 743                                 if (inset->getContents() == from) {
 744                                         inset->setContents(to);
 745                                         changed_inset = true;
 746                                 }
 747                         }
 748                 }
 749                 if (changed_inset) {
 750                         need_update = true;
 751
 752                         // FIXME
 753
 754                         // The test it.size()==1 was needed to prevent crashes.
 755                         // How to set the cursor corretly when it.size()>1 ??
 756                         if (it.size() == 1) {
 757                                 text->setCursorIntern(par, 0);
 758                                 text->redoParagraphs(text->cursor,
 759                                                      boost::next(text->cursor.par()));
 760                                 text->fullRebreak();
 761                         }
 762                 }
 763         }
 764         text->setCursorIntern(cursor.par(), cursor.pos());
 765         return need_update;
 766 }
 767
 768
 769 bool BufferView::ChangeRefsIfUnique(string const & from, string const & to)
 770 {
 771         // Check if the label 'from' appears more than once
 772         vector<string> labels = buffer()->getLabelList();
 773
 774         if (lyx::count(labels.begin(), labels.end(), from) > 1)
 775                 return false;
 776
 777         return ChangeInsets(Inset::REF_CODE, from, to);
 778 }
 779
 780
 781 bool BufferView::ChangeCitationsIfUnique(string const & from, string const & to)
 782 {
 783         typedef pair<string, string> StringPair;
 784
 785         vector<StringPair> keys;
 786         buffer()->fillWithBibKeys(keys);
 787         if (count_if(keys.begin(), keys.end(),
 788                      lyx::equal_1st_in_pair<StringPair>(from))
 789             > 1)
 790                 return false;
 791
 792         return ChangeInsets(Inset::CITE_CODE, from, to);
 793 }
 794
 795
 796 UpdatableInset * BufferView::theLockingInset() const
 797 {
 798         // If NULL is not allowed we should put an Assert here. (Lgb)
 799         if (text)
 800                 return text->the_locking_inset;
 801         return 0;
 802 }
 803
 804
 805 void BufferView::theLockingInset(UpdatableInset * inset)
 806 {
 807         text->the_locking_inset = inset;
 808 }
 809
 810
 811 LyXText * BufferView::getLyXText() const
 812 {
 813         if (theLockingInset()) {
 814                 LyXText * txt = theLockingInset()->getLyXText(this, true);
 815                 if (txt)
 816                         return txt;
 817         }
 818         return text;
 819 }
 820
 821
 822 LyXText * BufferView::getParentText(Inset * inset) const
 823 {
 824         if (inset->owner()) {
 825                 LyXText * txt = inset->getLyXText(this);
 826                 inset = inset->owner();
 827                 while (inset && inset->getLyXText(this) == txt)
 828                         inset = inset->owner();
 829                 if (inset)
 830                         return inset->getLyXText(this);
 831         }
 832         return text;
 833 }
 834
 835
 836 Language const * BufferView::getParentLanguage(Inset * inset) const
 837 {
 838         LyXText * text = getParentText(inset);
 839         return text->cursor.par()->getFontSettings(buffer()->params,
 840                                                    text->cursor.pos()).language();
 841 }
 842
 843
 844 Encoding const * BufferView::getEncoding() const
 845 {
 846         LyXText * t = getLyXText();
 847         if (!t)
 848                 return 0;
 849
 850         LyXCursor const & c = t->cursor;
 851         LyXFont const font = c.par()->getFont(buffer()->params, c.pos(),
 852                                               outerFont(c.par(), t->ownerParagraphs()));
 853         return font.language()->encoding();
 854 }
 855
 856
 857 void BufferView::haveSelection(bool sel)
 858 {
 859         pimpl_->workarea().haveSelection(sel);
 860 }
 861
 862
 863 int BufferView::workHeight() const
 864 {
 865         return pimpl_->workarea().workHeight();
 866 }