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