src/CutAndPaste.cpp

   1 /**
   2  * \file CutAndPaste.cpp
   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  * \author Michael Gerz
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "CutAndPaste.h"
  17
  18 #include "Buffer.h"
  19 #include "buffer_funcs.h"
  20 #include "BufferParams.h"
  21 #include "BufferView.h"
  22 #include "Changes.h"
  23 #include "Cursor.h"
  24 #include "ErrorList.h"
  25 #include "FuncCode.h"
  26 #include "FuncRequest.h"
  27 #include "InsetIterator.h"
  28 #include "InsetList.h"
  29 #include "Language.h"
  30 #include "LyXFunc.h"
  31 #include "LyXRC.h"
  32 #include "Text.h"
  33 #include "Paragraph.h"
  34 #include "paragraph_funcs.h"
  35 #include "ParagraphParameters.h"
  36 #include "ParIterator.h"
  37 #include "Undo.h"
  38
  39 #include "insets/InsetFlex.h"
  40 #include "insets/InsetCommand.h"
  41 #include "insets/InsetGraphics.h"
  42 #include "insets/InsetGraphicsParams.h"
  43 #include "insets/InsetTabular.h"
  44
  45 #include "mathed/MathData.h"
  46 #include "mathed/InsetMath.h"
  47 #include "mathed/MathSupport.h"
  48
  49 #include "support/debug.h"
  50 #include "support/docstream.h"
  51 #include "support/gettext.h"
  52 #include "support/limited_stack.h"
  53 #include "support/lstrings.h"
  54
  55 #include "frontends/Clipboard.h"
  56 #include "frontends/Selection.h"
  57
  58 #include <boost/tuple/tuple.hpp>
  59 #include <boost/next_prior.hpp>
  60
  61 #include <string>
  62
  63 using namespace std;
  64 using namespace lyx::support;
  65 using lyx::frontend::Clipboard;
  66
  67 namespace lyx {
  68
  69 namespace {
  70
  71 typedef pair<pit_type, int> PitPosPair;
  72
  73 typedef limited_stack<pair<ParagraphList, DocumentClass const *> > CutStack;
  74
  75 CutStack theCuts(10);
  76 // persistent selection, cleared until the next selection
  77 CutStack selectionBuffer(1);
  78
  79 // store whether the tabular stack is newer than the normal copy stack
  80 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  81 // when we (hopefully) have a one-for-all paste mechanism.
  82 bool dirty_tabular_stack_ = false;
  83
  84
  85 bool checkPastePossible(int index)
  86 {
  87         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
  88 }
  89
  90
  91 pair<PitPosPair, pit_type>
  92 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
  93                      DocumentClass const * const oldDocClass, ErrorList & errorlist)
  94 {
  95         Buffer const & buffer = cur.buffer();
  96         pit_type pit = cur.pit();
  97         pos_type pos = cur.pos();
  98         ParagraphList & pars = cur.text()->paragraphs();
  99
 100         if (parlist.empty())
 101                 return make_pair(PitPosPair(pit, pos), pit);
 102
 103         BOOST_ASSERT (pos <= pars[pit].size());
 104
 105         // Make a copy of the CaP paragraphs.
 106         ParagraphList insertion = parlist;
 107         DocumentClass const * const newDocClass =
 108                 buffer.params().documentClassPtr();
 109
 110         // Now remove all out of the pars which is NOT allowed in the
 111         // new environment and set also another font if that is required.
 112
 113         // Convert newline to paragraph break in ERT inset.
 114         // This should not be here!
 115         Inset * inset = pars[pit].inInset();
 116         if (inset && (inset->lyxCode() == ERT_CODE ||
 117                         inset->lyxCode() == LISTINGS_CODE)) {
 118                 for (size_t i = 0; i != insertion.size(); ++i) {
 119                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 120                                 if (insertion[i].isNewline(j)) {
 121                                         // do not track deletion of newline
 122                                         insertion[i].eraseChar(j, false);
 123                                         breakParagraphConservative(
 124                                                         buffer.params(),
 125                                                         insertion, i, j);
 126                                 }
 127                         }
 128                 }
 129         }
 130
 131         // set the paragraphs to empty layout if necessary
 132         if (cur.inset().usePlainLayout()) {
 133                 bool forcePlainLayout = cur.inset().forcePlainLayout();
 134                 Layout const & emptyLayout = newDocClass->emptyLayout();
 135                 Layout const & defaultLayout = newDocClass->defaultLayout();
 136                 ParagraphList::iterator const end = insertion.end();
 137                 ParagraphList::iterator par = insertion.begin();
 138                 for (; par != end; ++par) {
 139                         Layout const & parLayout = par->layout();
 140                         if (forcePlainLayout || parLayout == defaultLayout)
 141                                 par->setLayout(emptyLayout);
 142                 }
 143         } else { // check if we need to reset from empty layout
 144                 Layout const & defaultLayout = newDocClass->defaultLayout();
 145                 Layout const & emptyLayout = newDocClass->emptyLayout();
 146                 ParagraphList::iterator const end = insertion.end();
 147                 ParagraphList::iterator par = insertion.begin();
 148                 for (; par != end; ++par) {
 149                         Layout const & parLayout = par->layout();
 150                         if (parLayout == emptyLayout)
 151                                 par->setLayout(defaultLayout);
 152                 }
 153         }
 154
 155         // Make sure there is no class difference.
 156         InsetText in;
 157         // This works without copying any paragraph data because we have
 158         // a specialized swap method for ParagraphList. This is important
 159         // since we store pointers to insets at some places and we don't
 160         // want to invalidate them.
 161         insertion.swap(in.paragraphs());
 162         cap::switchBetweenClasses(oldDocClass, newDocClass, in, errorlist);
 163         insertion.swap(in.paragraphs());
 164
 165         ParagraphList::iterator tmpbuf = insertion.begin();
 166         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 167
 168         depth_type max_depth = pars[pit].getMaxDepthAfter();
 169
 170         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 171                 // If we have a negative jump so that the depth would
 172                 // go below 0 depth then we have to redo the delta to
 173                 // this new max depth level so that subsequent
 174                 // paragraphs are aligned correctly to this paragraph
 175                 // at level 0.
 176                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 177                         depth_delta = 0;
 178
 179                 // Set the right depth so that we are not too deep or shallow.
 180                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 181                 if (tmpbuf->params().depth() > max_depth)
 182                         tmpbuf->params().depth(max_depth);
 183
 184                 // Only set this from the 2nd on as the 2nd depends
 185                 // for maxDepth still on pit.
 186                 if (tmpbuf != insertion.begin())
 187                         max_depth = tmpbuf->getMaxDepthAfter();
 188
 189                 // Set the inset owner of this paragraph.
 190                 tmpbuf->setInsetOwner(pars[pit].inInset());
 191                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 192                         // do not track deletion of invalid insets
 193                         if (Inset * inset = tmpbuf->getInset(i))
 194                                 if (!pars[pit].insetAllowed(inset->lyxCode()))
 195                                         tmpbuf->eraseChar(i--, false);
 196                 }
 197
 198                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 199                                          Change::INSERTED : Change::UNCHANGED));
 200         }
 201
 202         bool const empty = pars[pit].empty();
 203         if (!empty) {
 204                 // Make the buf exactly the same layout as the cursor
 205                 // paragraph.
 206                 insertion.begin()->makeSameLayout(pars[pit]);
 207         }
 208
 209         // Prepare the paragraphs and insets for insertion.
 210         // A couple of insets store buffer references so need updating.
 211         insertion.swap(in.paragraphs());
 212
 213         InsetIterator const i_end = inset_iterator_end(in);
 214
 215         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 216
 217                 it->setBuffer(const_cast<Buffer &>(buffer));
 218
 219                 switch (it->lyxCode()) {
 220
 221                 case LABEL_CODE: {
 222                         // check for duplicates
 223                         InsetCommand & lab = static_cast<InsetCommand &>(*it);
 224                         docstring const oldname = lab.getParam("name");
 225                         lab.updateCommand(oldname, false);
 226                         docstring const newname = lab.getParam("name");
 227                         if (oldname != newname) {
 228                                 // adapt the references
 229                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 230                                         if (itt->lyxCode() == REF_CODE) {
 231                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 232                                                 if (ref.getParam("reference") == oldname)
 233                                                         ref.setParam("reference", newname);
 234                                         }
 235                                 }
 236                         }
 237                         break;
 238                 }
 239
 240                 case BIBITEM_CODE: {
 241                         // check for duplicates
 242                         InsetCommand & bib = static_cast<InsetCommand &>(*it);
 243                         docstring const oldkey = bib.getParam("key");
 244                         bib.updateCommand(oldkey, false);
 245                         docstring const newkey = bib.getParam("key");
 246                         if (oldkey != newkey) {
 247                                 // adapt the references
 248                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 249                                         if (itt->lyxCode() == CITE_CODE) {
 250                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 251                                                 if (ref.getParam("key") == oldkey)
 252                                                         ref.setParam("key", newkey);
 253                                         }
 254                                 }
 255                         }
 256                         break;
 257                 }
 258
 259                 default:
 260                         break; // nothing
 261                 }
 262         }
 263         insertion.swap(in.paragraphs());
 264
 265         // Split the paragraph for inserting the buf if necessary.
 266         if (!empty)
 267                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 268
 269         // Paste it!
 270         if (empty) {
 271                 pars.insert(boost::next(pars.begin(), pit),
 272                             insertion.begin(),
 273                             insertion.end());
 274
 275                 // merge the empty par with the last par of the insertion
 276                 mergeParagraph(buffer.params(), pars,
 277                                pit + insertion.size() - 1);
 278         } else {
 279                 pars.insert(boost::next(pars.begin(), pit + 1),
 280                             insertion.begin(),
 281                             insertion.end());
 282
 283                 // merge the first par of the insertion with the current par
 284                 mergeParagraph(buffer.params(), pars, pit);
 285         }
 286
 287         pit_type last_paste = pit + insertion.size() - 1;
 288
 289         // Store the new cursor position.
 290         pit = last_paste;
 291         pos = pars[last_paste].size();
 292
 293         // Join (conditionally) last pasted paragraph with next one, i.e.,
 294         // the tail of the spliced document paragraph
 295         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 296                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 297                         mergeParagraph(buffer.params(), pars, last_paste);
 298                 } else if (pars[last_paste + 1].empty()) {
 299                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 300                         mergeParagraph(buffer.params(), pars, last_paste);
 301                 } else if (pars[last_paste].empty()) {
 302                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 303                         mergeParagraph(buffer.params(), pars, last_paste);
 304                 } else {
 305                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 306                         ++last_paste;
 307                 }
 308         }
 309
 310         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 311 }
 312
 313
 314 PitPosPair eraseSelectionHelper(BufferParams const & params,
 315         ParagraphList & pars,
 316         pit_type startpit, pit_type endpit,
 317         int startpos, int endpos)
 318 {
 319         // Start of selection is really invalid.
 320         if (startpit == pit_type(pars.size()) ||
 321             (startpos > pars[startpit].size()))
 322                 return PitPosPair(endpit, endpos);
 323
 324         // Start and end is inside same paragraph
 325         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 326                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 327                 return PitPosPair(endpit, endpos);
 328         }
 329
 330         for (pit_type pit = startpit; pit != endpit + 1;) {
 331                 pos_type const left  = (pit == startpit ? startpos : 0);
 332                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 333                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 334
 335                 // Logically erase only, including the end-of-paragraph character
 336                 pars[pit].eraseChars(left, right, params.trackChanges);
 337
 338                 // Separate handling of paragraph break:
 339                 if (merge && pit != endpit &&
 340                     (pit + 1 != endpit
 341                      || pars[pit].hasSameLayout(pars[endpit])
 342                      || pars[endpit].size() == endpos)) {
 343                         if (pit + 1 == endpit)
 344                                 endpos += pars[pit].size();
 345                         mergeParagraph(params, pars, pit);
 346                         --endpit;
 347                 } else
 348                         ++pit;
 349         }
 350
 351         // Ensure legal cursor pos:
 352         endpit = startpit;
 353         endpos = startpos;
 354         return PitPosPair(endpit, endpos);
 355 }
 356
 357
 358 void putClipboard(ParagraphList const & paragraphs,
 359         DocumentClass const * const docclass, docstring const & plaintext)
 360 {
 361         // For some strange reason gcc 3.2 and 3.3 do not accept
 362         // Buffer buffer(string(), false);
 363         // This needs to be static to avoid a memory leak. When a Buffer is
 364         // constructed, it constructs a BufferParams, which in turn constructs
 365         // a DocumentClass, via new, that is never deleted. If we were to go to
 366         // some kind of garbage collection there, or a shared_ptr, then this
 367         // would not be needed.
 368         static Buffer buffer("", false);
 369         buffer.setUnnamed(true);
 370         buffer.paragraphs() = paragraphs;
 371         buffer.params().setDocumentClass(docclass);
 372         ostringstream lyx;
 373         if (buffer.write(lyx))
 374                 theClipboard().put(lyx.str(), plaintext);
 375         else
 376                 theClipboard().put(string(), plaintext);
 377         // Save that memory
 378         buffer.paragraphs().clear();
 379 }
 380
 381
 382 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 383         pit_type startpit, pit_type endpit,
 384         int start, int end, DocumentClass const * const dc, CutStack & cutstack)
 385 {
 386         LASSERT(0 <= start && start <= pars[startpit].size(), /**/);
 387         LASSERT(0 <= end && end <= pars[endpit].size(), /**/);
 388         LASSERT(startpit != endpit || start <= end, /**/);
 389
 390         // Clone the paragraphs within the selection.
 391         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 392                                 boost::next(pars.begin(), endpit + 1));
 393
 394         // Remove the end of the last paragraph; afterwards, remove the
 395         // beginning of the first paragraph. Keep this order - there may only
 396         // be one paragraph!  Do not track deletions here; this is an internal
 397         // action not visible to the user
 398
 399         Paragraph & back = copy_pars.back();
 400         back.eraseChars(end, back.size(), false);
 401         Paragraph & front = copy_pars.front();
 402         front.eraseChars(0, start, false);
 403
 404         ParagraphList::iterator it = copy_pars.begin();
 405         ParagraphList::iterator it_end = copy_pars.end();
 406
 407         for (; it != it_end; it++) {
 408                 // ERT paragraphs have the Language latex_language.
 409                 // This is invalid outside of ERT, so we need to change it
 410                 // to the buffer language.
 411                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 412                         it->changeLanguage(buf.params(), latex_language, buf.language());
 413                 }
 414                 it->setInsetOwner(0);
 415         }
 416
 417         // do not copy text (also nested in insets) which is marked as deleted
 418         acceptChanges(copy_pars, buf.params());
 419
 420         DocumentClass * d = const_cast<DocumentClass *>(dc);
 421         cutstack.push(make_pair(copy_pars, d));
 422 }
 423
 424 } // namespace anon
 425
 426
 427
 428
 429 namespace cap {
 430
 431 void region(CursorSlice const & i1, CursorSlice const & i2,
 432             Inset::row_type & r1, Inset::row_type & r2,
 433             Inset::col_type & c1, Inset::col_type & c2)
 434 {
 435         Inset & p = i1.inset();
 436         c1 = p.col(i1.idx());
 437         c2 = p.col(i2.idx());
 438         if (c1 > c2)
 439                 swap(c1, c2);
 440         r1 = p.row(i1.idx());
 441         r2 = p.row(i2.idx());
 442         if (r1 > r2)
 443                 swap(r1, r2);
 444 }
 445
 446
 447 docstring grabAndEraseSelection(Cursor & cur)
 448 {
 449         if (!cur.selection())
 450                 return docstring();
 451         docstring res = grabSelection(cur);
 452         eraseSelection(cur);
 453         return res;
 454 }
 455
 456
 457 bool reduceSelectionToOneCell(Cursor & cur)
 458 {
 459         if (!cur.selection() || !cur.inMathed())
 460                 return false;
 461
 462         CursorSlice i1 = cur.selBegin();
 463         CursorSlice i2 = cur.selEnd();
 464         if (!i1.inset().asInsetMath())
 465                 return false;
 466
 467         // the easy case: do nothing if only one cell is selected
 468         if (i1.idx() == i2.idx())
 469                 return true;
 470
 471         cur.top().pos() = 0;
 472         cur.resetAnchor();
 473         cur.top().pos() = cur.top().lastpos();
 474
 475         return true;
 476 }
 477
 478
 479 bool multipleCellsSelected(Cursor const & cur)
 480 {
 481         if (!cur.selection() || !cur.inMathed())
 482                 return false;
 483
 484         CursorSlice i1 = cur.selBegin();
 485         CursorSlice i2 = cur.selEnd();
 486         if (!i1.inset().asInsetMath())
 487                 return false;
 488
 489         if (i1.idx() == i2.idx())
 490                 return false;
 491
 492         return true;
 493 }
 494
 495
 496 void switchBetweenClasses(DocumentClass const * const oldone,
 497                 DocumentClass const * const newone, InsetText & in, ErrorList & errorlist)
 498 {
 499         errorlist.clear();
 500
 501         LASSERT(!in.paragraphs().empty(), /**/);
 502         if (oldone == newone)
 503                 return;
 504
 505         DocumentClass const & oldtc = *oldone;
 506         DocumentClass const & newtc = *newone;
 507
 508         // layouts
 509         ParIterator end = par_iterator_end(in);
 510         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 511                 docstring const name = it->layout().name();
 512
 513                 // the pasted text will keep their own layout name. If this layout does
 514                 // not exist in the new document, it will behave like a standard layout.
 515                 newtc.addLayoutIfNeeded(name);
 516
 517                 if (in.usePlainLayout())
 518                         it->setLayout(newtc.emptyLayout());
 519                 else
 520                         it->setLayout(newtc[name]);
 521         }
 522
 523         // character styles
 524         InsetIterator const i_end = inset_iterator_end(in);
 525         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 526                 InsetCollapsable * inset = it->asInsetCollapsable();
 527                 if (!inset)
 528                         continue;
 529                 if (inset->lyxCode() != FLEX_CODE)
 530                         // FIXME: Should we verify all InsetCollapsable?
 531                         continue;
 532                 inset->setLayout(newone);
 533                 if (!inset->undefined())
 534                         continue;
 535                 // The flex inset is undefined in newtc
 536                 docstring const s = bformat(_(
 537                         "Flex inset %1$s is "
 538                         "undefined because of class "
 539                         "conversion from\n%2$s to %3$s"),
 540                         inset->name(), from_utf8(oldtc.name()),
 541                         from_utf8(newtc.name()));
 542                 // To warn the user that something had to be done.
 543                 errorlist.push_back(ErrorItem(
 544                                 _("Undefined flex inset"),
 545                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 546         }
 547 }
 548
 549
 550 vector<docstring> availableSelections()
 551 {
 552         vector<docstring> selList;
 553
 554         CutStack::const_iterator cit = theCuts.begin();
 555         CutStack::const_iterator end = theCuts.end();
 556         for (; cit != end; ++cit) {
 557                 // we do not use cit-> here because gcc 2.9x does not
 558                 // like it (JMarc)
 559                 ParagraphList const & pars = (*cit).first;
 560                 docstring asciiSel;
 561                 ParagraphList::const_iterator pit = pars.begin();
 562                 ParagraphList::const_iterator pend = pars.end();
 563                 for (; pit != pend; ++pit) {
 564                         asciiSel += pit->asString(AS_STR_INSETS);
 565                         if (asciiSel.size() > 25) {
 566                                 asciiSel.replace(22, docstring::npos,
 567                                                  from_ascii("..."));
 568                                 break;
 569                         }
 570                 }
 571
 572                 selList.push_back(asciiSel);
 573         }
 574
 575         return selList;
 576 }
 577
 578
 579 size_type numberOfSelections()
 580 {
 581         return theCuts.size();
 582 }
 583
 584
 585 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 586 {
 587         // This doesn't make sense, if there is no selection
 588         if (!cur.selection())
 589                 return;
 590
 591         // OK, we have a selection. This is always between cur.selBegin()
 592         // and cur.selEnd()
 593
 594         if (cur.inTexted()) {
 595                 Text * text = cur.text();
 596                 LASSERT(text, /**/);
 597
 598                 saveSelection(cur);
 599
 600                 // make sure that the depth behind the selection are restored, too
 601                 cur.recordUndoSelection();
 602                 pit_type begpit = cur.selBegin().pit();
 603                 pit_type endpit = cur.selEnd().pit();
 604
 605                 int endpos = cur.selEnd().pos();
 606
 607                 BufferParams const & bp = cur.buffer().params();
 608                 if (realcut) {
 609                         copySelectionHelper(cur.buffer(),
 610                                 text->paragraphs(),
 611                                 begpit, endpit,
 612                                 cur.selBegin().pos(), endpos,
 613                                 bp.documentClassPtr(), theCuts);
 614                         // Stuff what we got on the clipboard.
 615                         // Even if there is no selection.
 616                         putClipboard(theCuts[0].first, theCuts[0].second,
 617                                 cur.selectionAsString(true));
 618                 }
 619
 620                 if (begpit != endpit)
 621                         cur.updateFlags(Update::Force | Update::FitCursor);
 622
 623                 boost::tie(endpit, endpos) =
 624                         eraseSelectionHelper(bp,
 625                                 text->paragraphs(),
 626                                 begpit, endpit,
 627                                 cur.selBegin().pos(), endpos);
 628
 629                 // cutSelection can invalidate the cursor so we need to set
 630                 // it anew. (Lgb)
 631                 // we prefer the end for when tracking changes
 632                 cur.pos() = endpos;
 633                 cur.pit() = endpit;
 634
 635                 // sometimes necessary
 636                 if (doclear
 637                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 638                         cur.fixIfBroken();
 639
 640                 // need a valid cursor. (Lgb)
 641                 cur.clearSelection();
 642                 updateLabels(cur.buffer());
 643
 644                 // tell tabular that a recent copy happened
 645                 dirtyTabularStack(false);
 646         }
 647
 648         if (cur.inMathed()) {
 649                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 650                         // The current selection spans more than one cell.
 651                         // Record all cells
 652                         cur.recordUndoInset();
 653                 } else {
 654                         // Record only the current cell to avoid a jumping
 655                         // cursor after undo
 656                         cur.recordUndo();
 657                 }
 658                 if (realcut)
 659                         copySelection(cur);
 660                 eraseSelection(cur);
 661         }
 662 }
 663
 664
 665 void copySelection(Cursor & cur)
 666 {
 667         copySelection(cur, cur.selectionAsString(true));
 668 }
 669
 670
 671 namespace {
 672
 673 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 674 {
 675         // this doesn't make sense, if there is no selection
 676         if (!cur.selection())
 677                 return;
 678
 679         // copySelection can not yet handle the case of cross idx selection
 680         if (cur.selBegin().idx() != cur.selEnd().idx())
 681                 return;
 682
 683         if (cur.inTexted()) {
 684                 Text * text = cur.text();
 685                 LASSERT(text, /**/);
 686                 // ok we have a selection. This is always between cur.selBegin()
 687                 // and sel_end cursor
 688
 689                 // copy behind a space if there is one
 690                 ParagraphList & pars = text->paragraphs();
 691                 pos_type pos = cur.selBegin().pos();
 692                 pit_type par = cur.selBegin().pit();
 693                 while (pos < pars[par].size() &&
 694                        pars[par].isLineSeparator(pos) &&
 695                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 696                         ++pos;
 697
 698                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 699                         pos, cur.selEnd().pos(),
 700                         cur.buffer().params().documentClassPtr(), cutstack);
 701                 dirtyTabularStack(false);
 702         }
 703
 704         if (cur.inMathed()) {
 705                 //lyxerr << "copySelection in mathed" << endl;
 706                 ParagraphList pars;
 707                 Paragraph par;
 708                 BufferParams const & bp = cur.buffer().params();
 709                 // FIXME This should be the empty layout...right?
 710                 par.setLayout(bp.documentClass().emptyLayout());
 711                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 712                 pars.push_back(par);
 713                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 714         }
 715 }
 716
 717 }
 718
 719
 720 void copySelectionToStack()
 721 {
 722         if (!selectionBuffer.empty())
 723                 theCuts.push(selectionBuffer[0]);
 724 }
 725
 726
 727 void copySelection(Cursor & cur, docstring const & plaintext)
 728 {
 729         // In tablemode, because copy and paste actually use special table stack
 730         // we do not attempt to get selected paragraphs under cursor. Instead, a
 731         // paragraph with the plain text version is generated so that table cells
 732         // can be pasted as pure text somewhere else.
 733         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 734                 ParagraphList pars;
 735                 Paragraph par;
 736                 BufferParams const & bp = cur.buffer().params();
 737                 par.setLayout(bp.documentClass().emptyLayout());
 738                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 739                 pars.push_back(par);
 740                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
 741         } else {
 742                 copySelectionToStack(cur, theCuts);
 743         }
 744
 745         // stuff the selection onto the X clipboard, from an explicit copy request
 746         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 747 }
 748
 749
 750 void saveSelection(Cursor & cur)
 751 {
 752         // This function is called, not when a selection is formed, but when
 753         // a selection is cleared. Therefore, multiple keyboard selection
 754         // will not repeatively trigger this function (bug 3877).
 755         if (cur.selection()
 756             && cur.selBegin() == cur.bv().cursor().selBegin()
 757             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 758                 LYXERR(Debug::ACTION, "'" << cur.selectionAsString(true) << "'");
 759                 copySelectionToStack(cur, selectionBuffer);
 760         }
 761 }
 762
 763
 764 bool selection()
 765 {
 766         return !selectionBuffer.empty();
 767 }
 768
 769
 770 void clearSelection()
 771 {
 772         selectionBuffer.clear();
 773 }
 774
 775
 776 void clearCutStack()
 777 {
 778         theCuts.clear();
 779 }
 780
 781
 782 docstring selection(size_t sel_index)
 783 {
 784         return sel_index < theCuts.size()
 785                 ? theCuts[sel_index].first.back().asString(AS_STR_INSETS)
 786                 : docstring();
 787 }
 788
 789
 790 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 791                         DocumentClass const * const docclass, ErrorList & errorList)
 792 {
 793         if (cur.inTexted()) {
 794                 Text * text = cur.text();
 795                 LASSERT(text, /**/);
 796
 797                 pit_type endpit;
 798                 PitPosPair ppp;
 799
 800                 boost::tie(ppp, endpit) =
 801                         pasteSelectionHelper(cur, parlist, docclass, errorList);
 802                 updateLabels(cur.buffer());
 803                 cur.clearSelection();
 804                 text->setCursor(cur, ppp.first, ppp.second);
 805         }
 806
 807         // mathed is handled in InsetMathNest/InsetMathGrid
 808         LASSERT(!cur.inMathed(), /**/);
 809 }
 810
 811
 812 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 813 {
 814         // this does not make sense, if there is nothing to paste
 815         if (!checkPastePossible(sel_index))
 816                 return;
 817
 818         cur.recordUndo();
 819         pasteParagraphList(cur, theCuts[sel_index].first,
 820                            theCuts[sel_index].second, errorList);
 821         cur.setSelection();
 822 }
 823
 824
 825 void pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 826 {
 827         // Use internal clipboard if it is the most recent one
 828         if (theClipboard().isInternal()) {
 829                 pasteFromStack(cur, errorList, 0);
 830                 return;
 831         }
 832
 833         // First try LyX format
 834         if (theClipboard().hasLyXContents()) {
 835                 string lyx = theClipboard().getAsLyX();
 836                 if (!lyx.empty()) {
 837                         // For some strange reason gcc 3.2 and 3.3 do not accept
 838                         // Buffer buffer(string(), false);
 839                         Buffer buffer("", false);
 840                         buffer.setUnnamed(true);
 841                         if (buffer.readString(lyx)) {
 842                                 cur.recordUndo();
 843                                 pasteParagraphList(cur, buffer.paragraphs(),
 844                                         buffer.params().documentClassPtr(), errorList);
 845                                 cur.setSelection();
 846                                 return;
 847                         }
 848                 }
 849         }
 850
 851         // Then try plain text
 852         docstring const text = theClipboard().getAsText();
 853         if (text.empty())
 854                 return;
 855         cur.recordUndo();
 856         if (asParagraphs)
 857                 cur.text()->insertStringAsParagraphs(cur, text);
 858         else
 859                 cur.text()->insertStringAsLines(cur, text);
 860 }
 861
 862
 863 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
 864                             Clipboard::GraphicsType preferedType)
 865 {
 866         LASSERT(theClipboard().hasGraphicsContents(preferedType), /**/);
 867
 868         // get picture from clipboard
 869         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
 870         if (filename.empty())
 871                 return;
 872
 873         // create inset for graphic
 874         InsetGraphics * inset = new InsetGraphics(cur.buffer());
 875         InsetGraphicsParams params;
 876         params.filename = support::DocFileName(filename.absFilename());
 877         inset->setParams(params);
 878         cur.recordUndo();
 879         cur.insert(inset);
 880 }
 881
 882
 883 void pasteSelection(Cursor & cur, ErrorList & errorList)
 884 {
 885         if (selectionBuffer.empty())
 886                 return;
 887         cur.recordUndo();
 888         pasteParagraphList(cur, selectionBuffer[0].first,
 889                            selectionBuffer[0].second, errorList);
 890 }
 891
 892
 893 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 894 {
 895         cur.recordUndo();
 896         DocIterator selbeg = cur.selectionBegin();
 897
 898         // Get font setting before we cut
 899         Font const font =
 900                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 901
 902         // Insert the new string
 903         pos_type pos = cur.selEnd().pos();
 904         Paragraph & par = cur.selEnd().paragraph();
 905         docstring::const_iterator cit = str.begin();
 906         docstring::const_iterator end = str.end();
 907         for (; cit != end; ++cit, ++pos)
 908                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 909
 910         // Cut the selection
 911         cutSelection(cur, true, false);
 912
 913         // select the replacement
 914         if (backwards) {
 915                 selbeg.pos() += str.length();
 916                 cur.setSelection(selbeg, -int(str.length()));
 917         } else
 918                 cur.setSelection(selbeg, str.length());
 919 }
 920
 921
 922 void replaceSelection(Cursor & cur)
 923 {
 924         if (cur.selection())
 925                 cutSelection(cur, true, false);
 926 }
 927
 928
 929 void eraseSelection(Cursor & cur)
 930 {
 931         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 932         CursorSlice const & i1 = cur.selBegin();
 933         CursorSlice const & i2 = cur.selEnd();
 934         if (i1.inset().asInsetMath()) {
 935                 saveSelection(cur);
 936                 cur.top() = i1;
 937                 if (i1.idx() == i2.idx()) {
 938                         i1.cell().erase(i1.pos(), i2.pos());
 939                         // We may have deleted i1.cell(cur.pos()).
 940                         // Make sure that pos is valid.
 941                         if (cur.pos() > cur.lastpos())
 942                                 cur.pos() = cur.lastpos();
 943                 } else {
 944                         InsetMath * p = i1.asInsetMath();
 945                         Inset::row_type r1, r2;
 946                         Inset::col_type c1, c2;
 947                         region(i1, i2, r1, r2, c1, c2);
 948                         for (Inset::row_type row = r1; row <= r2; ++row)
 949                                 for (Inset::col_type col = c1; col <= c2; ++col)
 950                                         p->cell(p->index(row, col)).clear();
 951                         // We've deleted the whole cell. Only pos 0 is valid.
 952                         cur.pos() = 0;
 953                 }
 954                 // need a valid cursor. (Lgb)
 955                 cur.clearSelection();
 956         } else {
 957                 lyxerr << "can't erase this selection 1" << endl;
 958         }
 959         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 960 }
 961
 962
 963 void selDel(Cursor & cur)
 964 {
 965         //lyxerr << "cap::selDel" << endl;
 966         if (cur.selection())
 967                 eraseSelection(cur);
 968 }
 969
 970
 971 void selClearOrDel(Cursor & cur)
 972 {
 973         //lyxerr << "cap::selClearOrDel" << endl;
 974         if (lyxrc.auto_region_delete)
 975                 selDel(cur);
 976         else
 977                 cur.selection() = false;
 978 }
 979
 980
 981 docstring grabSelection(Cursor const & cur)
 982 {
 983         if (!cur.selection())
 984                 return docstring();
 985
 986 #if 0
 987         // grab selection by glueing multiple cells together. This is not what
 988         // we want because selections spanning multiple cells will get "&" and "\\"
 989         // seperators.
 990         ostringstream os;
 991         for (DocIterator dit = cur.selectionBegin();
 992              dit != cur.selectionEnd(); dit.forwardPos())
 993                 os << asString(dit.cell());
 994         return os.str();
 995 #endif
 996
 997         CursorSlice i1 = cur.selBegin();
 998         CursorSlice i2 = cur.selEnd();
 999
1000         if (i1.idx() == i2.idx()) {
1001                 if (i1.inset().asInsetMath()) {
1002                         MathData::const_iterator it = i1.cell().begin();
1003                         return asString(MathData(it + i1.pos(), it + i2.pos()));
1004                 } else {
1005                         return from_ascii("unknown selection 1");
1006                 }
1007         }
1008
1009         Inset::row_type r1, r2;
1010         Inset::col_type c1, c2;
1011         region(i1, i2, r1, r2, c1, c2);
1012
1013         docstring data;
1014         if (i1.inset().asInsetMath()) {
1015                 for (Inset::row_type row = r1; row <= r2; ++row) {
1016                         if (row > r1)
1017                                 data += "\\\\";
1018                         for (Inset::col_type col = c1; col <= c2; ++col) {
1019                                 if (col > c1)
1020                                         data += '&';
1021                                 data += asString(i1.asInsetMath()->
1022                                         cell(i1.asInsetMath()->index(row, col)));
1023                         }
1024                 }
1025         } else {
1026                 data = from_ascii("unknown selection 2");
1027         }
1028         return data;
1029 }
1030
1031
1032 void dirtyTabularStack(bool b)
1033 {
1034         dirty_tabular_stack_ = b;
1035 }
1036
1037
1038 bool tabularStackDirty()
1039 {
1040         return dirty_tabular_stack_;
1041 }
1042
1043
1044 } // namespace cap
1045
1046 } // namespace lyx