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