src/CutAndPaste.C

   1 /*
   2  * \file CutAndPaste.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Jürgen Vigna
   7  * \author Lars Gullik Bjønnes
   8  * \author Alfredo Braunstein
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "CutAndPaste.h"
  16
  17 #include "buffer.h"
  18 #include "buffer_funcs.h"
  19 #include "bufferparams.h"
  20 #include "BufferView.h"
  21 #include "cursor.h"
  22 #include "debug.h"
  23 #include "errorlist.h"
  24 #include "funcrequest.h"
  25 #include "gettext.h"
  26 #include "insetiterator.h"
  27 #include "lfuns.h"
  28 #include "lyxrc.h"
  29 #include "lyxtext.h"
  30 #include "lyxtextclasslist.h"
  31 #include "paragraph.h"
  32 #include "paragraph_funcs.h"
  33 #include "ParagraphParameters.h"
  34 #include "ParagraphList_fwd.h"
  35 #include "pariterator.h"
  36 #include "undo.h"
  37
  38 #include "insets/insetcharstyle.h"
  39 #include "insets/insettabular.h"
  40
  41 #include "mathed/math_data.h"
  42 #include "mathed/math_inset.h"
  43 #include "mathed/math_support.h"
  44
  45 #include "support/lstrings.h"
  46
  47 #include <boost/tuple/tuple.hpp>
  48
  49 using lyx::pos_type;
  50 using lyx::pit_type;
  51 using lyx::textclass_type;
  52
  53 using lyx::support::bformat;
  54
  55 using std::endl;
  56 using std::for_each;
  57 using std::make_pair;
  58 using std::pair;
  59 using std::vector;
  60 using std::string;
  61
  62
  63 namespace {
  64
  65 typedef std::pair<lyx::pit_type, int> PitPosPair;
  66
  67 typedef limited_stack<pair<ParagraphList, textclass_type> > CutStack;
  68
  69 CutStack theCuts(10);
  70
  71 // store whether the tabular stack is newer than the normal copy stack
  72 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  73 // when we (hopefully) have a one-for-all paste mechanism.
  74 bool dirty_tabular_stack_;
  75
  76 class resetOwnerAndChanges : public std::unary_function<Paragraph, void> {
  77 public:
  78         void operator()(Paragraph & p) const {
  79                 p.cleanChanges();
  80                 p.setInsetOwner(0);
  81         }
  82 };
  83
  84
  85 void region(CursorSlice const & i1, CursorSlice const & i2,
  86         InsetBase::row_type & r1, InsetBase::row_type & r2,
  87         InsetBase::col_type & c1, InsetBase::col_type & c2)
  88 {
  89         InsetBase & p = i1.inset();
  90         c1 = p.col(i1.idx());
  91         c2 = p.col(i2.idx());
  92         if (c1 > c2)
  93                 std::swap(c1, c2);
  94         r1 = p.row(i1.idx());
  95         r2 = p.row(i2.idx());
  96         if (r1 > r2)
  97                 std::swap(r1, r2);
  98 }
  99
 100
 101 bool checkPastePossible(int index)
 102 {
 103         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 104 }
 105
 106
 107 pair<PitPosPair, pit_type>
 108 pasteSelectionHelper(Buffer const & buffer,
 109                      ParagraphList & pars, pit_type pit, int pos,
 110                      ParagraphList const & parlist, textclass_type textclass,
 111                      ErrorList & errorlist)
 112 {
 113         if (parlist.empty())
 114                 return make_pair(PitPosPair(pit, pos), pit);
 115
 116         BOOST_ASSERT (pos <= pars[pit].size());
 117
 118         // Make a copy of the CaP paragraphs.
 119         ParagraphList insertion = parlist;
 120         textclass_type const tc = buffer.params().textclass;
 121
 122         // Now remove all out of the pars which is NOT allowed in the
 123         // new environment and set also another font if that is required.
 124
 125         // Convert newline to paragraph break in ERT inset.
 126         // This should not be here!
 127         if (pars[pit].inInset() &&
 128             pars[pit].inInset()->lyxCode() == InsetBase::ERT_CODE) {
 129                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 130                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 131                                 if (insertion[i].isNewline(j)) {
 132                                         insertion[i].erase(j);
 133                                         breakParagraphConservative(
 134                                                         buffer.params(),
 135                                                         insertion, i, j);
 136                                 }
 137                         }
 138                 }
 139         }
 140
 141         // Make sure there is no class difference.
 142         lyx::cap::SwitchBetweenClasses(textclass, tc, insertion, errorlist);
 143
 144         ParagraphList::iterator tmpbuf = insertion.begin();
 145         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 146
 147         Paragraph::depth_type max_depth = pars[pit].getMaxDepthAfter();
 148
 149         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 150                 // If we have a negative jump so that the depth would
 151                 // go below 0 depth then we have to redo the delta to
 152                 // this new max depth level so that subsequent
 153                 // paragraphs are aligned correctly to this paragraph
 154                 // at level 0.
 155                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 156                         depth_delta = 0;
 157
 158                 // Set the right depth so that we are not too deep or shallow.
 159                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 160                 if (tmpbuf->params().depth() > max_depth)
 161                         tmpbuf->params().depth(max_depth);
 162
 163                 // Only set this from the 2nd on as the 2nd depends
 164                 // for maxDepth still on pit.
 165                 if (tmpbuf != insertion.begin())
 166                         max_depth = tmpbuf->getMaxDepthAfter();
 167
 168                 // Set the inset owner of this paragraph.
 169                 tmpbuf->setInsetOwner(pars[pit].inInset());
 170                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 171                         if (tmpbuf->getChar(i) == Paragraph::META_INSET &&
 172                             !pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 173                                 tmpbuf->erase(i--);
 174                 }
 175         }
 176
 177         bool const empty = pars[pit].empty();
 178         if (!empty) {
 179                 // Make the buf exactly the same layout as the cursor
 180                 // paragraph.
 181                 insertion.begin()->makeSameLayout(pars[pit]);
 182         }
 183
 184         // Prepare the paragraphs and insets for insertion.
 185         // A couple of insets store buffer references so need updating.
 186         InsetText in;
 187         std::swap(in.paragraphs(), insertion);
 188
 189         ParIterator fpit = par_iterator_begin(in);
 190         ParIterator fend = par_iterator_end(in);
 191
 192         for (; fpit != fend; ++fpit) {
 193                 InsetList::iterator lit = fpit->insetlist.begin();
 194                 InsetList::iterator eit = fpit->insetlist.end();
 195
 196                 for (; lit != eit; ++lit) {
 197                         switch (lit->inset->lyxCode()) {
 198                         case InsetBase::TABULAR_CODE: {
 199                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 200                                 it->buffer(&buffer);
 201                                 break;
 202                         }
 203
 204                         default:
 205                                 break; // nothing
 206                         }
 207                 }
 208         }
 209         std::swap(in.paragraphs(), insertion);
 210
 211         // Split the paragraph for inserting the buf if necessary.
 212         if (!empty)
 213                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 214
 215         // Paste it!
 216         if (empty) {
 217                 pars.insert(boost::next(pars.begin(), pit),
 218                             insertion.begin(),
 219                             insertion.end());
 220
 221                 // merge the empty par with the last par of the insertion
 222                 mergeParagraph(buffer.params(), pars,
 223                                pit + insertion.size() - 1);
 224         } else {
 225                 pars.insert(boost::next(pars.begin(), pit + 1),
 226                             insertion.begin(),
 227                             insertion.end());
 228
 229                 // merge the first par of the insertion with the current par
 230                 mergeParagraph(buffer.params(), pars, pit);
 231         }
 232
 233         pit_type last_paste = pit + insertion.size() - 1;
 234
 235         // Store the new cursor position.
 236         pit = last_paste;
 237         pos = pars[last_paste].size();
 238
 239         // Join (conditionally) last pasted paragraph with next one, i.e.,
 240         // the tail of the spliced document paragraph
 241         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 242                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 243                         mergeParagraph(buffer.params(), pars, last_paste);
 244                 } else if (pars[last_paste + 1].empty()) {
 245                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 246                         mergeParagraph(buffer.params(), pars, last_paste);
 247                 } else if (pars[last_paste].empty()) {
 248                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 249                         mergeParagraph(buffer.params(), pars, last_paste);
 250                 } else {
 251                         pars[last_paste + 1].stripLeadingSpaces();
 252                         ++last_paste;
 253                 }
 254         }
 255
 256         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 257 }
 258
 259
 260 PitPosPair eraseSelectionHelper(BufferParams const & params,
 261         ParagraphList & pars,
 262         pit_type startpit, pit_type endpit,
 263         int startpos, int endpos, bool doclear)
 264 {
 265         // Start of selection is really invalid.
 266         if (startpit == pit_type(pars.size()) ||
 267             (startpos > pars[startpit].size()))
 268                 return PitPosPair(endpit, endpos);
 269
 270         // Start and end is inside same paragraph
 271         if (endpit == pit_type(pars.size()) ||
 272             startpit == endpit) {
 273                 endpos -= pars[startpit].erase(startpos, endpos);
 274                 return PitPosPair(endpit, endpos);
 275         }
 276
 277         // A paragraph break has to be physically removed by merging, but
 278         // only if either (1) change tracking is off, or (2) the para break
 279         // is "blue"
 280         for (pit_type pit = startpit; pit != endpit + 1;) {
 281                 bool const merge = !params.tracking_changes ||
 282                         pars[pit].lookupChange(pars[pit].size()) ==
 283                         Change::INSERTED;
 284                 pos_type const left  = ( pit == startpit ? startpos : 0 );
 285                 pos_type const right = ( pit == endpit ? endpos :
 286                                 pars[pit].size() + 1 );
 287                 // Logical erase only:
 288                 pars[pit].erase(left, right);
 289                 // Separate handling of para break:
 290                 if (merge && pit != endpit &&
 291                    pars[pit].hasSameLayout(pars[pit + 1])) {
 292                         pos_type const thissize = pars[pit].size();
 293                         if (doclear)
 294                                 pars[pit + 1].stripLeadingSpaces();
 295                         mergeParagraph(params, pars, pit);
 296                         --endpit;
 297                         if (pit == endpit)
 298                                 endpos += thissize;
 299                 } else
 300                         ++pit;
 301         }
 302
 303         // Ensure legal cursor pos:
 304         endpit = startpit;
 305         endpos = startpos;
 306         return PitPosPair(endpit, endpos);
 307 }
 308
 309
 310 void copySelectionHelper(ParagraphList & pars,
 311         pit_type startpit, pit_type endpit,
 312         int start, int end, textclass_type tc)
 313 {
 314         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 315         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 316         BOOST_ASSERT(startpit != endpit || start <= end);
 317
 318         // Clone the paragraphs within the selection.
 319         ParagraphList paragraphs(boost::next(pars.begin(), startpit),
 320                                  boost::next(pars.begin(), endpit + 1));
 321
 322         for_each(paragraphs.begin(), paragraphs.end(), resetOwnerAndChanges());
 323
 324         // Cut out the end of the last paragraph.
 325         Paragraph & back = paragraphs.back();
 326         back.erase(end, back.size());
 327
 328         // Cut out the begin of the first paragraph
 329         Paragraph & front = paragraphs.front();
 330         front.erase(0, start);
 331
 332         theCuts.push(make_pair(paragraphs, tc));
 333 }
 334
 335 } // namespace anon
 336
 337
 338
 339
 340 namespace lyx {
 341 namespace cap {
 342
 343 string grabAndEraseSelection(LCursor & cur)
 344 {
 345         if (!cur.selection())
 346                 return string();
 347         string res = grabSelection(cur);
 348         eraseSelection(cur);
 349         return res;
 350 }
 351
 352
 353 void SwitchBetweenClasses(textclass_type c1, textclass_type c2,
 354         ParagraphList & pars, ErrorList & errorlist)
 355 {
 356         BOOST_ASSERT(!pars.empty());
 357         if (c1 == c2)
 358                 return;
 359
 360         LyXTextClass const & tclass1 = textclasslist[c1];
 361         LyXTextClass const & tclass2 = textclasslist[c2];
 362
 363         InsetText in;
 364         std::swap(in.paragraphs(), pars);
 365
 366         // layouts
 367         ParIterator end = par_iterator_end(in);
 368         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 369                 string const name = it->layout()->name();
 370                 bool hasLayout = tclass2.hasLayout(name);
 371
 372                 if (hasLayout)
 373                         it->layout(tclass2[name]);
 374                 else
 375                         it->layout(tclass2.defaultLayout());
 376
 377                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 378                         string const s = bformat(
 379                                 _("Layout had to be changed from\n%1$s to %2$s\n"
 380                                 "because of class conversion from\n%3$s to %4$s"),
 381                          name, it->layout()->name(), tclass1.name(), tclass2.name());
 382                         // To warn the user that something had to be done.
 383                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 384                                                       it->id(), 0,
 385                                                       it->size()));
 386                 }
 387         }
 388
 389         // character styles
 390         InsetIterator const i_end = inset_iterator_end(in);
 391         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 392                 if (it->lyxCode() == InsetBase::CHARSTYLE_CODE) {
 393                         InsetCharStyle & inset =
 394                                 static_cast<InsetCharStyle &>(*it);
 395                         string const name = inset.params().type;
 396                         CharStyles::iterator const found_cs =
 397                                 tclass2.charstyle(name);
 398                         if (found_cs == tclass2.charstyles().end()) {
 399                                 // The character style is undefined in tclass2
 400                                 inset.setUndefined();
 401                                 string const s = bformat(_(
 402                                         "Character style %1$s is "
 403                                         "undefined because of class "
 404                                         "conversion from\n%2$s to %3$s"),
 405                                          name, tclass1.name(), tclass2.name());
 406                                 // To warn the user that something had to be done.
 407                                 errorlist.push_back(ErrorItem(
 408                                                 _("Undefined character style"),
 409                                                 s, it.paragraph().id(),
 410                                                 it.pos(), it.pos() + 1));
 411                         } else if (inset.undefined()) {
 412                                 // The character style is undefined in
 413                                 // tclass1 and is defined in tclass2
 414                                 inset.setDefined(found_cs);
 415                         }
 416                 }
 417         }
 418
 419         std::swap(in.paragraphs(), pars);
 420 }
 421
 422
 423 std::vector<string> const availableSelections(Buffer const & buffer)
 424 {
 425         vector<string> selList;
 426
 427         CutStack::const_iterator cit = theCuts.begin();
 428         CutStack::const_iterator end = theCuts.end();
 429         for (; cit != end; ++cit) {
 430                 // we do not use cit-> here because gcc 2.9x does not
 431                 // like it (JMarc)
 432                 ParagraphList const & pars = (*cit).first;
 433                 string asciiSel;
 434                 ParagraphList::const_iterator pit = pars.begin();
 435                 ParagraphList::const_iterator pend = pars.end();
 436                 for (; pit != pend; ++pit) {
 437                         asciiSel += pit->asString(buffer, false);
 438                         if (asciiSel.size() > 25) {
 439                                 asciiSel.replace(22, string::npos, "...");
 440                                 break;
 441                         }
 442                 }
 443
 444                 selList.push_back(asciiSel);
 445         }
 446
 447         return selList;
 448 }
 449
 450
 451 lyx::size_type numberOfSelections()
 452 {
 453         return theCuts.size();
 454 }
 455
 456
 457 void cutSelection(LCursor & cur, bool doclear, bool realcut)
 458 {
 459         // This doesn't make sense, if there is no selection
 460         if (!cur.selection())
 461                 return;
 462
 463         // OK, we have a selection. This is always between cur.selBegin()
 464         // and cur.selEnd()
 465
 466         if (cur.inTexted()) {
 467                 LyXText * text = cur.text();
 468                 BOOST_ASSERT(text);
 469                 // Stuff what we got on the clipboard. Even if there is no selection.
 470
 471                 // There is a problem with having the stuffing here in that the
 472                 // larger the selection the slower LyX will get. This can be
 473                 // solved by running the line below only when the selection has
 474                 // finished. The solution used currently just works, to make it
 475                 // faster we need to be more clever and probably also have more
 476                 // calls to stuffClipboard. (Lgb)
 477 //              cur.bv().stuffClipboard(cur.selectionAsString(true));
 478
 479                 // make sure that the depth behind the selection are restored, too
 480                 recordUndoSelection(cur);
 481                 pit_type begpit = cur.selBegin().pit();
 482                 pit_type endpit = cur.selEnd().pit();
 483
 484                 int endpos = cur.selEnd().pos();
 485
 486                 BufferParams const & bp = cur.buffer().params();
 487                 if (realcut) {
 488                         copySelectionHelper(text->paragraphs(),
 489                                 begpit, endpit,
 490                                 cur.selBegin().pos(), endpos,
 491                                 bp.textclass);
 492                 }
 493
 494                 boost::tie(endpit, endpos) =
 495                         eraseSelectionHelper(bp,
 496                                 text->paragraphs(),
 497                                 begpit, endpit,
 498                                 cur.selBegin().pos(), endpos,
 499                                 doclear);
 500
 501                 // sometimes necessary
 502                 if (doclear)
 503                         text->paragraphs()[begpit].stripLeadingSpaces();
 504
 505                 // cutSelection can invalidate the cursor so we need to set
 506                 // it anew. (Lgb)
 507                 // we prefer the end for when tracking changes
 508                 cur.pos() = endpos;
 509                 cur.pit() = endpit;
 510
 511                 // need a valid cursor. (Lgb)
 512                 cur.clearSelection();
 513                 updateCounters(cur.buffer());
 514
 515                 // tell tabular that a recent copy happened
 516                 dirtyTabularStack(false);
 517         }
 518
 519         if (cur.inMathed()) {
 520                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 521                         // The current selection spans more than one cell.
 522                         // Record all cells
 523                         recordUndoInset(cur);
 524                 } else {
 525                         // Record only the current cell to avoid a jumping
 526                         // cursor after undo
 527                         recordUndo(cur);
 528                 }
 529                 if (realcut)
 530                         copySelection(cur);
 531                 eraseSelection(cur);
 532         }
 533 }
 534
 535
 536 void copySelection(LCursor & cur)
 537 {
 538         // stuff the selection onto the X clipboard, from an explicit copy request
 539         cur.bv().stuffClipboard(cur.selectionAsString(true));
 540
 541         // this doesn't make sense, if there is no selection
 542         if (!cur.selection())
 543                 return;
 544
 545         if (cur.inTexted()) {
 546                 LyXText * text = cur.text();
 547                 BOOST_ASSERT(text);
 548                 // ok we have a selection. This is always between cur.selBegin()
 549                 // and sel_end cursor
 550
 551                 // copy behind a space if there is one
 552                 ParagraphList & pars = text->paragraphs();
 553                 pos_type pos = cur.selBegin().pos();
 554                 pit_type par = cur.selBegin().pit();
 555                 while (pos < pars[par].size()
 556                                          && pars[par].isLineSeparator(pos)
 557                                          && (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 558                         ++pos;
 559
 560                 copySelectionHelper(pars, par, cur.selEnd().pit(),
 561                         pos, cur.selEnd().pos(), cur.buffer().params().textclass);
 562         }
 563
 564         if (cur.inMathed()) {
 565                 lyxerr << "copySelection in mathed" << endl;
 566                 ParagraphList pars;
 567                 pars.push_back(Paragraph());
 568                 BufferParams const & bp = cur.buffer().params();
 569                 pars.back().layout(bp.getLyXTextClass().defaultLayout());
 570                 for_each(pars.begin(), pars.end(), resetOwnerAndChanges());
 571                 pars.back().insert(0, grabSelection(cur), LyXFont());
 572                 theCuts.push(make_pair(pars, bp.textclass));
 573         }
 574         // tell tabular that a recent copy happened
 575         dirtyTabularStack(false);
 576 }
 577
 578
 579 std::string getSelection(Buffer const & buf, size_t sel_index)
 580 {
 581         return sel_index < theCuts.size()
 582                 ? theCuts[sel_index].first.back().asString(buf, false)
 583                 : string();
 584 }
 585
 586
 587 void pasteParagraphList(LCursor & cur, ParagraphList const & parlist,
 588                         textclass_type textclass)
 589 {
 590         if (cur.inTexted()) {
 591                 LyXText * text = cur.text();
 592                 BOOST_ASSERT(text);
 593
 594                 recordUndo(cur);
 595
 596                 pit_type endpit;
 597                 PitPosPair ppp;
 598                 ErrorList el;
 599
 600                 boost::tie(ppp, endpit) =
 601                         pasteSelectionHelper(cur.buffer(),
 602                                              text->paragraphs(),
 603                                              cur.pit(), cur.pos(),
 604                                              parlist, textclass,
 605                                              el);
 606                 bufferErrors(cur.buffer(), el);
 607                 updateCounters(cur.buffer());
 608                 cur.clearSelection();
 609                 text->setCursor(cur, ppp.first, ppp.second);
 610         }
 611
 612         // mathed is handled in MathNestInset/MathGridInset
 613         BOOST_ASSERT(!cur.inMathed());
 614 }
 615
 616
 617 void pasteSelection(LCursor & cur, size_t sel_index)
 618 {
 619         // this does not make sense, if there is nothing to paste
 620         if (!checkPastePossible(sel_index))
 621                 return;
 622
 623         pasteParagraphList(cur, theCuts[sel_index].first,
 624                            theCuts[sel_index].second);
 625         cur.bv().showErrorList(_("Paste"));
 626         cur.setSelection();
 627 }
 628
 629
 630 void setSelectionRange(LCursor & cur, pos_type length)
 631 {
 632         LyXText * text = cur.text();
 633         BOOST_ASSERT(text);
 634         if (!length)
 635                 return;
 636         cur.resetAnchor();
 637         while (length--)
 638                 text->cursorRight(cur);
 639         cur.setSelection();
 640 }
 641
 642
 643 // simple replacing. The font of the first selected character is used
 644 void replaceSelectionWithString(LCursor & cur, string const & str)
 645 {
 646         LyXText * text = cur.text();
 647         BOOST_ASSERT(text);
 648         recordUndo(cur);
 649
 650         // Get font setting before we cut
 651         pos_type pos = cur.selEnd().pos();
 652         Paragraph & par = text->getPar(cur.selEnd().pit());
 653         LyXFont const font =
 654                 par.getFontSettings(cur.buffer().params(), cur.selBegin().pos());
 655
 656         // Insert the new string
 657         string::const_iterator cit = str.begin();
 658         string::const_iterator end = str.end();
 659         for (; cit != end; ++cit, ++pos)
 660                 par.insertChar(pos, (*cit), font);
 661
 662         // Cut the selection
 663         cutSelection(cur, true, false);
 664 }
 665
 666
 667 void replaceSelection(LCursor & cur)
 668 {
 669         if (cur.selection())
 670                 cutSelection(cur, true, false);
 671 }
 672
 673
 674 // only used by the spellchecker
 675 void replaceWord(LCursor & cur, string const & replacestring)
 676 {
 677         LyXText * text = cur.text();
 678         BOOST_ASSERT(text);
 679
 680         replaceSelectionWithString(cur, replacestring);
 681         setSelectionRange(cur, replacestring.length());
 682
 683         // Go back so that replacement string is also spellchecked
 684         for (string::size_type i = 0; i < replacestring.length() + 1; ++i)
 685                 text->cursorLeft(cur);
 686 }
 687
 688
 689 void eraseSelection(LCursor & cur)
 690 {
 691         //lyxerr << "LCursor::eraseSelection begin: " << cur << endl;
 692         CursorSlice const & i1 = cur.selBegin();
 693         CursorSlice const & i2 = cur.selEnd();
 694         if (i1.inset().asMathInset()) {
 695                 cur.top() = i1;
 696                 if (i1.idx() == i2.idx()) {
 697                         i1.cell().erase(i1.pos(), i2.pos());
 698                         // We may have deleted i1.cell(cur.pos()).
 699                         // Make sure that pos is valid.
 700                         if (cur.pos() > cur.lastpos())
 701                                 cur.pos() = cur.lastpos();
 702                 } else {
 703                         MathInset * p = i1.asMathInset();
 704                         InsetBase::row_type r1, r2;
 705                         InsetBase::col_type c1, c2;
 706                         region(i1, i2, r1, r2, c1, c2);
 707                         for (InsetBase::row_type row = r1; row <= r2; ++row)
 708                                 for (InsetBase::col_type col = c1; col <= c2; ++col)
 709                                         p->cell(p->index(row, col)).clear();
 710                         // We've deleted the whole cell. Only pos 0 is valid.
 711                         cur.pos() = 0;
 712                 }
 713                 // need a valid cursor. (Lgb)
 714                 cur.clearSelection();
 715         } else {
 716                 lyxerr << "can't erase this selection 1" << endl;
 717         }
 718         //lyxerr << "LCursor::eraseSelection end: " << cur << endl;
 719 }
 720
 721
 722 void selDel(LCursor & cur)
 723 {
 724         //lyxerr << "LCursor::selDel" << endl;
 725         if (cur.selection())
 726                 eraseSelection(cur);
 727 }
 728
 729
 730 void selClearOrDel(LCursor & cur)
 731 {
 732         //lyxerr << "LCursor::selClearOrDel" << endl;
 733         if (lyxrc.auto_region_delete)
 734                 selDel(cur);
 735         else
 736                 cur.selection() = false;
 737 }
 738
 739
 740 string grabSelection(LCursor const & cur)
 741 {
 742         if (!cur.selection())
 743                 return string();
 744
 745         // FIXME: What is wrong with the following?
 746 #if 0
 747         std::ostringstream os;
 748         for (DocIterator dit = cur.selectionBegin();
 749              dit != cur.selectionEnd(); dit.forwardPos())
 750                 os << asString(dit.cell());
 751         return os.str();
 752 #endif
 753
 754         CursorSlice i1 = cur.selBegin();
 755         CursorSlice i2 = cur.selEnd();
 756
 757         if (i1.idx() == i2.idx()) {
 758                 if (i1.inset().asMathInset()) {
 759                         MathArray::const_iterator it = i1.cell().begin();
 760                         return asString(MathArray(it + i1.pos(), it + i2.pos()));
 761                 } else {
 762                         return "unknown selection 1";
 763                 }
 764         }
 765
 766         InsetBase::row_type r1, r2;
 767         InsetBase::col_type c1, c2;
 768         region(i1, i2, r1, r2, c1, c2);
 769
 770         string data;
 771         if (i1.inset().asMathInset()) {
 772                 for (InsetBase::row_type row = r1; row <= r2; ++row) {
 773                         if (row > r1)
 774                                 data += "\\\\";
 775                         for (InsetBase::col_type col = c1; col <= c2; ++col) {
 776                                 if (col > c1)
 777                                         data += '&';
 778                                 data += asString(i1.asMathInset()->
 779                                         cell(i1.asMathInset()->index(row, col)));
 780                         }
 781                 }
 782         } else {
 783                 data = "unknown selection 2";
 784         }
 785         return data;
 786 }
 787
 788
 789 void dirtyTabularStack(bool b)
 790 {
 791         dirty_tabular_stack_ = b;
 792 }
 793
 794
 795 bool tabularStackDirty()
 796 {
 797         return dirty_tabular_stack_;
 798 }
 799
 800
 801 } // namespace cap
 802 } // namespace lyx