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