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