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 "cursor.h"
  21 #include "debug.h"
  22 #include "errorlist.h"
  23 #include "funcrequest.h"
  24 #include "gettext.h"
  25 #include "insetiterator.h"
  26 #include "language.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/MathData.h"
  42 #include "mathed/InsetMath.h"
  43 #include "mathed/MathSupport.h"
  44
  45 #include "support/lstrings.h"
  46
  47 #include "frontends/Clipboard.h"
  48
  49 #include <boost/tuple/tuple.hpp>
  50
  51 using lyx::docstring;
  52 using lyx::pos_type;
  53 using lyx::pit_type;
  54 using lyx::textclass_type;
  55
  56 using lyx::support::bformat;
  57
  58 using lyx::frontend::Clipboard;
  59
  60 using std::endl;
  61 using std::for_each;
  62 using std::make_pair;
  63 using std::pair;
  64 using std::vector;
  65 using std::string;
  66
  67
  68 namespace {
  69
  70 typedef std::pair<lyx::pit_type, int> PitPosPair;
  71
  72 typedef limited_stack<pair<ParagraphList, textclass_type> > CutStack;
  73
  74 CutStack theCuts(10);
  75
  76 // store whether the tabular stack is newer than the normal copy stack
  77 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  78 // when we (hopefully) have a one-for-all paste mechanism.
  79 bool dirty_tabular_stack_;
  80
  81 class resetParagraph : public std::unary_function<Paragraph, Buffer const &> {
  82 public:
  83         resetParagraph(Buffer const & b) : buffer_(b) {}
  84         void operator()(Paragraph & p) const {
  85                 // FIXME: change tracking (MG)
  86                 // set p's text to INSERTED in CT mode; clear CT info otherwise
  87
  88                 // ERT paragraphs have the Language latex_language.
  89                 // This is invalid outside of ERT, so we need to change it
  90                 // to the buffer language.
  91                 if (p.ownerCode() == InsetBase::ERT_CODE) {
  92                         p.changeLanguage(buffer_.params(), latex_language,
  93                                          buffer_.getLanguage());
  94                 }
  95                 p.setInsetOwner(0);
  96         }
  97 private:
  98         Buffer const & buffer_;
  99 };
 100
 101
 102 void region(CursorSlice const & i1, CursorSlice const & i2,
 103         InsetBase::row_type & r1, InsetBase::row_type & r2,
 104         InsetBase::col_type & c1, InsetBase::col_type & c2)
 105 {
 106         InsetBase & p = i1.inset();
 107         c1 = p.col(i1.idx());
 108         c2 = p.col(i2.idx());
 109         if (c1 > c2)
 110                 std::swap(c1, c2);
 111         r1 = p.row(i1.idx());
 112         r2 = p.row(i2.idx());
 113         if (r1 > r2)
 114                 std::swap(r1, r2);
 115 }
 116
 117
 118 bool checkPastePossible(int index)
 119 {
 120         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 121 }
 122
 123
 124 pair<PitPosPair, pit_type>
 125 pasteSelectionHelper(LCursor & cur, ParagraphList const & parlist,
 126                      textclass_type textclass, ErrorList & errorlist)
 127 {
 128         Buffer const & buffer = cur.buffer();
 129         pit_type pit = cur.pit();
 130         pos_type pos = cur.pos();
 131         ParagraphList & pars = cur.text()->paragraphs();
 132
 133         if (parlist.empty())
 134                 return make_pair(PitPosPair(pit, pos), pit);
 135
 136         BOOST_ASSERT (pos <= pars[pit].size());
 137
 138         // Make a copy of the CaP paragraphs.
 139         ParagraphList insertion = parlist;
 140         textclass_type const tc = buffer.params().textclass;
 141
 142         // Now remove all out of the pars which is NOT allowed in the
 143         // new environment and set also another font if that is required.
 144
 145         // Convert newline to paragraph break in ERT inset.
 146         // This should not be here!
 147         if (pars[pit].inInset() &&
 148             pars[pit].inInset()->lyxCode() == InsetBase::ERT_CODE) {
 149                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 150                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 151                                 if (insertion[i].isNewline(j)) {
 152                                         insertion[i].erase(j);
 153                                         breakParagraphConservative(
 154                                                         buffer.params(),
 155                                                         insertion, i, j);
 156                                 }
 157                         }
 158                 }
 159         }
 160
 161         // If we are in an inset which returns forceDefaultParagraphs,
 162         // set the paragraphs to default
 163         if (cur.inset().forceDefaultParagraphs(cur.idx())) {
 164                 LyXLayout_ptr const layout =
 165                         buffer.params().getLyXTextClass().defaultLayout();
 166                 ParagraphList::iterator const end = insertion.end();
 167                 for (ParagraphList::iterator par = insertion.begin();
 168                                 par != end; ++par)
 169                         par->layout(layout);
 170         }
 171
 172         // Make sure there is no class difference.
 173         InsetText in;
 174         // This works without copying any paragraph data because we have
 175         // a specialized swap method for ParagraphList. This is important
 176         // since we store pointers to insets at some places and we don't
 177         // want to invalidate them.
 178         insertion.swap(in.paragraphs());
 179         lyx::cap::switchBetweenClasses(textclass, tc, in, errorlist);
 180         insertion.swap(in.paragraphs());
 181
 182         ParagraphList::iterator tmpbuf = insertion.begin();
 183         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 184
 185         Paragraph::depth_type max_depth = pars[pit].getMaxDepthAfter();
 186
 187         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 188                 // If we have a negative jump so that the depth would
 189                 // go below 0 depth then we have to redo the delta to
 190                 // this new max depth level so that subsequent
 191                 // paragraphs are aligned correctly to this paragraph
 192                 // at level 0.
 193                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 194                         depth_delta = 0;
 195
 196                 // Set the right depth so that we are not too deep or shallow.
 197                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 198                 if (tmpbuf->params().depth() > max_depth)
 199                         tmpbuf->params().depth(max_depth);
 200
 201                 // Only set this from the 2nd on as the 2nd depends
 202                 // for maxDepth still on pit.
 203                 if (tmpbuf != insertion.begin())
 204                         max_depth = tmpbuf->getMaxDepthAfter();
 205
 206                 // Set the inset owner of this paragraph.
 207                 tmpbuf->setInsetOwner(pars[pit].inInset());
 208                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 209                         if (tmpbuf->getChar(i) == Paragraph::META_INSET &&
 210                             !pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 211                                 tmpbuf->erase(i--);
 212                 }
 213
 214                 // FIXME: Change tracking (MG)
 215                 // set tmpbuf's text to INSERTED in CT mode; clear CT info otherwise
 216         }
 217
 218         bool const empty = pars[pit].empty();
 219         if (!empty) {
 220                 // Make the buf exactly the same layout as the cursor
 221                 // paragraph.
 222                 insertion.begin()->makeSameLayout(pars[pit]);
 223         }
 224
 225         // Prepare the paragraphs and insets for insertion.
 226         // A couple of insets store buffer references so need updating.
 227         insertion.swap(in.paragraphs());
 228
 229         ParIterator fpit = par_iterator_begin(in);
 230         ParIterator fend = par_iterator_end(in);
 231
 232         for (; fpit != fend; ++fpit) {
 233                 InsetList::iterator lit = fpit->insetlist.begin();
 234                 InsetList::iterator eit = fpit->insetlist.end();
 235
 236                 for (; lit != eit; ++lit) {
 237                         switch (lit->inset->lyxCode()) {
 238                         case InsetBase::TABULAR_CODE: {
 239                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 240                                 it->buffer(&buffer);
 241                                 break;
 242                         }
 243
 244                         default:
 245                                 break; // nothing
 246                         }
 247                 }
 248         }
 249         insertion.swap(in.paragraphs());
 250
 251         // Split the paragraph for inserting the buf if necessary.
 252         if (!empty)
 253                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 254
 255         // Paste it!
 256         if (empty) {
 257                 pars.insert(boost::next(pars.begin(), pit),
 258                             insertion.begin(),
 259                             insertion.end());
 260
 261                 // merge the empty par with the last par of the insertion
 262                 mergeParagraph(buffer.params(), pars,
 263                                pit + insertion.size() - 1);
 264         } else {
 265                 pars.insert(boost::next(pars.begin(), pit + 1),
 266                             insertion.begin(),
 267                             insertion.end());
 268
 269                 // merge the first par of the insertion with the current par
 270                 mergeParagraph(buffer.params(), pars, pit);
 271         }
 272
 273         pit_type last_paste = pit + insertion.size() - 1;
 274
 275         // Store the new cursor position.
 276         pit = last_paste;
 277         pos = pars[last_paste].size();
 278
 279         // Join (conditionally) last pasted paragraph with next one, i.e.,
 280         // the tail of the spliced document paragraph
 281         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 282                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 283                         mergeParagraph(buffer.params(), pars, last_paste);
 284                 } else if (pars[last_paste + 1].empty()) {
 285                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 286                         mergeParagraph(buffer.params(), pars, last_paste);
 287                 } else if (pars[last_paste].empty()) {
 288                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 289                         mergeParagraph(buffer.params(), pars, last_paste);
 290                 } else {
 291                         pars[last_paste + 1].stripLeadingSpaces();
 292                         ++last_paste;
 293                 }
 294         }
 295
 296         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 297 }
 298
 299
 300 PitPosPair eraseSelectionHelper(BufferParams const & params,
 301         ParagraphList & pars,
 302         pit_type startpit, pit_type endpit,
 303         int startpos, int endpos, bool doclear)
 304 {
 305         // Start of selection is really invalid.
 306         if (startpit == pit_type(pars.size()) ||
 307             (startpos > pars[startpit].size()))
 308                 return PitPosPair(endpit, endpos);
 309
 310         // Start and end is inside same paragraph
 311         if (endpit == pit_type(pars.size()) ||
 312             startpit == endpit) {
 313                 endpos -= pars[startpit].erase(startpos, endpos);
 314                 return PitPosPair(endpit, endpos);
 315         }
 316
 317         // A paragraph break has to be physically removed by merging, but
 318         // only if either (1) change tracking is off, or (2) the para break
 319         // is "blue"
 320         for (pit_type pit = startpit; pit != endpit + 1;) {
 321                 // FIXME: Change tracking (MG)
 322                 bool const merge = !params.trackChanges ||
 323                         pars[pit].lookupChange(pars[pit].size()) ==
 324                         Change(Change::INSERTED);
 325                 pos_type const left  = ( pit == startpit ? startpos : 0 );
 326                 pos_type const right = ( pit == endpit ? endpos :
 327                                 pars[pit].size() + 1 );
 328                 // Logical erase only:
 329                 pars[pit].erase(left, right);
 330                 // Separate handling of para break:
 331                 if (merge && pit != endpit &&
 332                    (pit + 1 != endpit || pars[pit].hasSameLayout(pars[pit + 1]))) {
 333                         pos_type const thissize = pars[pit].size();
 334                         if (doclear)
 335                                 pars[pit + 1].stripLeadingSpaces();
 336                         mergeParagraph(params, pars, pit);
 337                         --endpit;
 338                         if (pit == endpit)
 339                                 endpos += thissize;
 340                 } else
 341                         ++pit;
 342         }
 343
 344         // Ensure legal cursor pos:
 345         endpit = startpit;
 346         endpos = startpos;
 347         return PitPosPair(endpit, endpos);
 348 }
 349
 350
 351 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 352         pit_type startpit, pit_type endpit,
 353         int start, int end, textclass_type tc)
 354 {
 355         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 356         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 357         BOOST_ASSERT(startpit != endpit || start <= end);
 358
 359         // Clone the paragraphs within the selection.
 360         ParagraphList paragraphs(boost::next(pars.begin(), startpit),
 361                                  boost::next(pars.begin(), endpit + 1));
 362
 363         for_each(paragraphs.begin(), paragraphs.end(), resetParagraph(buf));
 364
 365         // Cut out the end of the last paragraph.
 366         Paragraph & back = paragraphs.back();
 367         back.erase(end, back.size());
 368
 369         // Cut out the begin of the first paragraph
 370         Paragraph & front = paragraphs.front();
 371         front.erase(0, start);
 372
 373         theCuts.push(make_pair(paragraphs, tc));
 374 }
 375
 376 } // namespace anon
 377
 378
 379
 380
 381 namespace lyx {
 382 namespace cap {
 383
 384 string grabAndEraseSelection(LCursor & cur)
 385 {
 386         if (!cur.selection())
 387                 return string();
 388         string res = grabSelection(cur);
 389         eraseSelection(cur);
 390         return res;
 391 }
 392
 393
 394 void switchBetweenClasses(textclass_type c1, textclass_type c2,
 395         InsetText & in, ErrorList & errorlist)
 396 {
 397         BOOST_ASSERT(!in.paragraphs().empty());
 398         if (c1 == c2)
 399                 return;
 400
 401         LyXTextClass const & tclass1 = textclasslist[c1];
 402         LyXTextClass const & tclass2 = textclasslist[c2];
 403
 404         // layouts
 405         ParIterator end = par_iterator_end(in);
 406         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 407                 string const name = it->layout()->name();
 408                 bool hasLayout = tclass2.hasLayout(name);
 409
 410                 if (hasLayout)
 411                         it->layout(tclass2[name]);
 412                 else
 413                         it->layout(tclass2.defaultLayout());
 414
 415                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 416                         docstring const s = bformat(
 417                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 418                                                 "because of class conversion from\n%3$s to %4$s"),
 419                          lyx::from_utf8(name), lyx::from_utf8(it->layout()->name()),
 420                          lyx::from_utf8(tclass1.name()), lyx::from_utf8(tclass2.name()));
 421                         // To warn the user that something had to be done.
 422                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 423                                                       it->id(), 0,
 424                                                       it->size()));
 425                 }
 426         }
 427
 428         // character styles
 429         InsetIterator const i_end = inset_iterator_end(in);
 430         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 431                 if (it->lyxCode() == InsetBase::CHARSTYLE_CODE) {
 432                         InsetCharStyle & inset =
 433                                 static_cast<InsetCharStyle &>(*it);
 434                         string const name = inset.params().type;
 435                         CharStyles::iterator const found_cs =
 436                                 tclass2.charstyle(name);
 437                         if (found_cs == tclass2.charstyles().end()) {
 438                                 // The character style is undefined in tclass2
 439                                 inset.setUndefined();
 440                                 docstring const s = bformat(_(
 441                                         "Character style %1$s is "
 442                                         "undefined because of class "
 443                                         "conversion from\n%2$s to %3$s"),
 444                                          lyx::from_utf8(name), lyx::from_utf8(tclass1.name()),
 445                                          lyx::from_utf8(tclass2.name()));
 446                                 // To warn the user that something had to be done.
 447                                 errorlist.push_back(ErrorItem(
 448                                         _("Undefined character style"),
 449                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 450                         } else if (inset.undefined()) {
 451                                 // The character style is undefined in
 452                                 // tclass1 and is defined in tclass2
 453                                 inset.setDefined(found_cs);
 454                         }
 455                 }
 456         }
 457 }
 458
 459
 460 std::vector<docstring> const availableSelections(Buffer const & buffer)
 461 {
 462         vector<docstring> selList;
 463
 464         CutStack::const_iterator cit = theCuts.begin();
 465         CutStack::const_iterator end = theCuts.end();
 466         for (; cit != end; ++cit) {
 467                 // we do not use cit-> here because gcc 2.9x does not
 468                 // like it (JMarc)
 469                 ParagraphList const & pars = (*cit).first;
 470                 docstring asciiSel;
 471                 ParagraphList::const_iterator pit = pars.begin();
 472                 ParagraphList::const_iterator pend = pars.end();
 473                 for (; pit != pend; ++pit) {
 474                         asciiSel += pit->asString(buffer, false);
 475                         if (asciiSel.size() > 25) {
 476                                 asciiSel.replace(22, docstring::npos,
 477                                                  lyx::from_ascii("..."));
 478                                 break;
 479                         }
 480                 }
 481
 482                 selList.push_back(asciiSel);
 483         }
 484
 485         return selList;
 486 }
 487
 488
 489 lyx::size_type numberOfSelections()
 490 {
 491         return theCuts.size();
 492 }
 493
 494
 495 void cutSelection(LCursor & cur, bool doclear, bool realcut)
 496 {
 497         // This doesn't make sense, if there is no selection
 498         if (!cur.selection())
 499                 return;
 500
 501         // OK, we have a selection. This is always between cur.selBegin()
 502         // and cur.selEnd()
 503
 504         if (cur.inTexted()) {
 505                 LyXText * text = cur.text();
 506                 BOOST_ASSERT(text);
 507                 // Stuff what we got on the clipboard. Even if there is no selection.
 508
 509                 // There is a problem with having the stuffing here in that the
 510                 // larger the selection the slower LyX will get. This can be
 511                 // solved by running the line below only when the selection has
 512                 // finished. The solution used currently just works, to make it
 513                 // faster we need to be more clever and probably also have more
 514                 // calls to theSelection().put. (Lgb)
 515 //              theSelection().put(cur.selectionAsString(true));
 516
 517
 518                 // make sure that the depth behind the selection are restored, too
 519                 recordUndoSelection(cur);
 520                 pit_type begpit = cur.selBegin().pit();
 521                 pit_type endpit = cur.selEnd().pit();
 522
 523                 int endpos = cur.selEnd().pos();
 524
 525                 BufferParams const & bp = cur.buffer().params();
 526                 if (realcut) {
 527                         copySelectionHelper(cur.buffer(),
 528                                 text->paragraphs(),
 529                                 begpit, endpit,
 530                                 cur.selBegin().pos(), endpos,
 531                                 bp.textclass);
 532                 }
 533
 534                 boost::tie(endpit, endpos) =
 535                         eraseSelectionHelper(bp,
 536                                 text->paragraphs(),
 537                                 begpit, endpit,
 538                                 cur.selBegin().pos(), endpos,
 539                                 doclear);
 540
 541                 // sometimes necessary
 542                 if (doclear)
 543                         text->paragraphs()[begpit].stripLeadingSpaces();
 544
 545                 // cutSelection can invalidate the cursor so we need to set
 546                 // it anew. (Lgb)
 547                 // we prefer the end for when tracking changes
 548                 cur.pos() = endpos;
 549                 cur.pit() = endpit;
 550
 551                 // need a valid cursor. (Lgb)
 552                 cur.clearSelection();
 553                 updateLabels(cur.buffer());
 554
 555                 // tell tabular that a recent copy happened
 556                 dirtyTabularStack(false);
 557         }
 558
 559         if (cur.inMathed()) {
 560                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 561                         // The current selection spans more than one cell.
 562                         // Record all cells
 563                         recordUndoInset(cur);
 564                 } else {
 565                         // Record only the current cell to avoid a jumping
 566                         // cursor after undo
 567                         recordUndo(cur);
 568                 }
 569                 if (realcut)
 570                         copySelection(cur);
 571                 eraseSelection(cur);
 572         }
 573 }
 574
 575
 576 void copySelection(LCursor & cur)
 577 {
 578         // stuff the selection onto the X clipboard, from an explicit copy request
 579         theClipboard().put(cur.selectionAsString(true));
 580
 581         // this doesn't make sense, if there is no selection
 582         if (!cur.selection())
 583                 return;
 584
 585         if (cur.inTexted()) {
 586                 LyXText * text = cur.text();
 587                 BOOST_ASSERT(text);
 588                 // ok we have a selection. This is always between cur.selBegin()
 589                 // and sel_end cursor
 590
 591                 // copy behind a space if there is one
 592                 ParagraphList & pars = text->paragraphs();
 593                 pos_type pos = cur.selBegin().pos();
 594                 pit_type par = cur.selBegin().pit();
 595                 while (pos < pars[par].size()
 596                                          && pars[par].isLineSeparator(pos)
 597                                          && (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 598                         ++pos;
 599
 600                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 601                         pos, cur.selEnd().pos(), cur.buffer().params().textclass);
 602         }
 603
 604         if (cur.inMathed()) {
 605                 //lyxerr << "copySelection in mathed" << endl;
 606                 ParagraphList pars;
 607                 pars.push_back(Paragraph());
 608                 BufferParams const & bp = cur.buffer().params();
 609                 pars.back().layout(bp.getLyXTextClass().defaultLayout());
 610                 for_each(pars.begin(), pars.end(), resetParagraph(cur.buffer()));
 611                 pars.back().insert(0, grabSelection(cur), LyXFont());
 612                 theCuts.push(make_pair(pars, bp.textclass));
 613         }
 614         // tell tabular that a recent copy happened
 615         dirtyTabularStack(false);
 616 }
 617
 618
 619 docstring getSelection(Buffer const & buf, size_t sel_index)
 620 {
 621         return sel_index < theCuts.size()
 622                 ? theCuts[sel_index].first.back().asString(buf, false)
 623                 : docstring();
 624 }
 625
 626
 627 void pasteParagraphList(LCursor & cur, ParagraphList const & parlist,
 628                         textclass_type textclass, ErrorList & errorList)
 629 {
 630         if (cur.inTexted()) {
 631                 LyXText * text = cur.text();
 632                 BOOST_ASSERT(text);
 633
 634                 recordUndo(cur);
 635
 636                 pit_type endpit;
 637                 PitPosPair ppp;
 638
 639                 boost::tie(ppp, endpit) =
 640                         pasteSelectionHelper(cur, parlist,
 641                                              textclass, errorList);
 642                 updateLabels(cur.buffer());
 643                 cur.clearSelection();
 644                 text->setCursor(cur, ppp.first, ppp.second);
 645         }
 646
 647         // mathed is handled in InsetMathNest/InsetMathGrid
 648         BOOST_ASSERT(!cur.inMathed());
 649 }
 650
 651
 652 void pasteSelection(LCursor & cur, ErrorList & errorList, size_t sel_index)
 653 {
 654         // this does not make sense, if there is nothing to paste
 655         if (!checkPastePossible(sel_index))
 656                 return;
 657
 658         pasteParagraphList(cur, theCuts[sel_index].first,
 659                            theCuts[sel_index].second, errorList);
 660         cur.setSelection();
 661 }
 662
 663
 664 // simple replacing. The font of the first selected character is used
 665 void replaceSelectionWithString(LCursor & cur, string const & str, bool backwards)
 666 {
 667         recordUndo(cur);
 668         DocIterator selbeg = cur.selectionBegin();
 669
 670         // Get font setting before we cut
 671         LyXFont const font =
 672                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 673
 674         // Insert the new string
 675         pos_type pos = cur.selEnd().pos();
 676         Paragraph & par = cur.selEnd().paragraph();
 677         string::const_iterator cit = str.begin();
 678         string::const_iterator end = str.end();
 679         for (; cit != end; ++cit, ++pos)
 680                 // FIXME: change tracking (MG)
 681                 par.insertChar(pos, (*cit), font, Change(Change::INSERTED));
 682
 683         // Cut the selection
 684         cutSelection(cur, true, false);
 685
 686         // select the replacement
 687         if (backwards) {
 688                 selbeg.pos() += str.length();
 689                 cur.setSelection(selbeg, -str.length());
 690         } else
 691                 cur.setSelection(selbeg, str.length());
 692 }
 693
 694
 695 void replaceSelection(LCursor & cur)
 696 {
 697         if (cur.selection())
 698                 cutSelection(cur, true, false);
 699 }
 700
 701
 702 void eraseSelection(LCursor & cur)
 703 {
 704         //lyxerr << "LCursor::eraseSelection begin: " << cur << endl;
 705         CursorSlice const & i1 = cur.selBegin();
 706         CursorSlice const & i2 = cur.selEnd();
 707         if (i1.inset().asInsetMath()) {
 708                 cur.top() = i1;
 709                 if (i1.idx() == i2.idx()) {
 710                         i1.cell().erase(i1.pos(), i2.pos());
 711                         // We may have deleted i1.cell(cur.pos()).
 712                         // Make sure that pos is valid.
 713                         if (cur.pos() > cur.lastpos())
 714                                 cur.pos() = cur.lastpos();
 715                 } else {
 716                         InsetMath * p = i1.asInsetMath();
 717                         InsetBase::row_type r1, r2;
 718                         InsetBase::col_type c1, c2;
 719                         region(i1, i2, r1, r2, c1, c2);
 720                         for (InsetBase::row_type row = r1; row <= r2; ++row)
 721                                 for (InsetBase::col_type col = c1; col <= c2; ++col)
 722                                         p->cell(p->index(row, col)).clear();
 723                         // We've deleted the whole cell. Only pos 0 is valid.
 724                         cur.pos() = 0;
 725                 }
 726                 // need a valid cursor. (Lgb)
 727                 cur.clearSelection();
 728         } else {
 729                 lyxerr << "can't erase this selection 1" << endl;
 730         }
 731         //lyxerr << "LCursor::eraseSelection end: " << cur << endl;
 732 }
 733
 734
 735 void selDel(LCursor & cur)
 736 {
 737         //lyxerr << "LCursor::selDel" << endl;
 738         if (cur.selection())
 739                 eraseSelection(cur);
 740 }
 741
 742
 743 void selClearOrDel(LCursor & cur)
 744 {
 745         //lyxerr << "LCursor::selClearOrDel" << endl;
 746         if (lyxrc.auto_region_delete)
 747                 selDel(cur);
 748         else
 749                 cur.selection() = false;
 750 }
 751
 752
 753 string grabSelection(LCursor const & cur)
 754 {
 755         if (!cur.selection())
 756                 return string();
 757
 758         // FIXME: What is wrong with the following?
 759 #if 0
 760         std::ostringstream os;
 761         for (DocIterator dit = cur.selectionBegin();
 762              dit != cur.selectionEnd(); dit.forwardPos())
 763                 os << asString(dit.cell());
 764         return os.str();
 765 #endif
 766
 767         CursorSlice i1 = cur.selBegin();
 768         CursorSlice i2 = cur.selEnd();
 769
 770         if (i1.idx() == i2.idx()) {
 771                 if (i1.inset().asInsetMath()) {
 772                         MathArray::const_iterator it = i1.cell().begin();
 773                         return asString(MathArray(it + i1.pos(), it + i2.pos()));
 774                 } else {
 775                         return "unknown selection 1";
 776                 }
 777         }
 778
 779         InsetBase::row_type r1, r2;
 780         InsetBase::col_type c1, c2;
 781         region(i1, i2, r1, r2, c1, c2);
 782
 783         string data;
 784         if (i1.inset().asInsetMath()) {
 785                 for (InsetBase::row_type row = r1; row <= r2; ++row) {
 786                         if (row > r1)
 787                                 data += "\\\\";
 788                         for (InsetBase::col_type col = c1; col <= c2; ++col) {
 789                                 if (col > c1)
 790                                         data += '&';
 791                                 data += asString(i1.asInsetMath()->
 792                                         cell(i1.asInsetMath()->index(row, col)));
 793                         }
 794                 }
 795         } else {
 796                 data = "unknown selection 2";
 797         }
 798         return data;
 799 }
 800
 801
 802 void dirtyTabularStack(bool b)
 803 {
 804         dirty_tabular_stack_ = b;
 805 }
 806
 807
 808 bool tabularStackDirty()
 809 {
 810         return dirty_tabular_stack_;
 811 }
 812
 813
 814 } // namespace cap
 815 } // namespace lyx