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 docclass, 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 tc = buffer.params().documentClassPtr();
 108
 109         // Now remove all out of the pars which is NOT allowed in the
 110         // new environment and set also another font if that is required.
 111
 112         // Convert newline to paragraph break in ERT inset.
 113         // This should not be here!
 114         Inset * inset = pars[pit].inInset();
 115         if (inset && (inset->lyxCode() == ERT_CODE ||
 116                         inset->lyxCode() == LISTINGS_CODE)) {
 117                 for (size_t i = 0; i != insertion.size(); ++i) {
 118                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 119                                 if (insertion[i].isNewline(j)) {
 120                                         // do not track deletion of newline
 121                                         insertion[i].eraseChar(j, false);
 122                                         breakParagraphConservative(
 123                                                         buffer.params(),
 124                                                         insertion, i, j);
 125                                 }
 126                         }
 127                 }
 128         }
 129
 130         // set the paragraphs to empty layout if necessary
 131         // note that we are doing this if the empty layout is
 132         // supposed to be the default, not just if it is forced
 133         if (cur.inset().useEmptyLayout()) {
 134                 Layout const & layout =
 135                         buffer.params().documentClass().emptyLayout();
 136                 ParagraphList::iterator const end = insertion.end();
 137                 for (ParagraphList::iterator par = insertion.begin();
 138                                 par != end; ++par)
 139                         par->setLayout(layout);
 140         }
 141
 142         // Make sure there is no class difference.
 143         InsetText in;
 144         // This works without copying any paragraph data because we have
 145         // a specialized swap method for ParagraphList. This is important
 146         // since we store pointers to insets at some places and we don't
 147         // want to invalidate them.
 148         insertion.swap(in.paragraphs());
 149         cap::switchBetweenClasses(docclass, tc, in, errorlist);
 150         insertion.swap(in.paragraphs());
 151
 152         ParagraphList::iterator tmpbuf = insertion.begin();
 153         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 154
 155         depth_type max_depth = pars[pit].getMaxDepthAfter();
 156
 157         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 158                 // If we have a negative jump so that the depth would
 159                 // go below 0 depth then we have to redo the delta to
 160                 // this new max depth level so that subsequent
 161                 // paragraphs are aligned correctly to this paragraph
 162                 // at level 0.
 163                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 164                         depth_delta = 0;
 165
 166                 // Set the right depth so that we are not too deep or shallow.
 167                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 168                 if (tmpbuf->params().depth() > max_depth)
 169                         tmpbuf->params().depth(max_depth);
 170
 171                 // Only set this from the 2nd on as the 2nd depends
 172                 // for maxDepth still on pit.
 173                 if (tmpbuf != insertion.begin())
 174                         max_depth = tmpbuf->getMaxDepthAfter();
 175
 176                 // Set the inset owner of this paragraph.
 177                 tmpbuf->setInsetOwner(pars[pit].inInset());
 178                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 179                         // do not track deletion of invalid insets
 180                         if (Inset * inset = tmpbuf->getInset(i))
 181                                 if (!pars[pit].insetAllowed(inset->lyxCode()))
 182                                         tmpbuf->eraseChar(i--, false);
 183                 }
 184
 185                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 186                                          Change::INSERTED : Change::UNCHANGED));
 187         }
 188
 189         bool const empty = pars[pit].empty();
 190         if (!empty) {
 191                 // Make the buf exactly the same layout as the cursor
 192                 // paragraph.
 193                 insertion.begin()->makeSameLayout(pars[pit]);
 194         }
 195
 196         // Prepare the paragraphs and insets for insertion.
 197         // A couple of insets store buffer references so need updating.
 198         insertion.swap(in.paragraphs());
 199
 200         InsetIterator const i_end = inset_iterator_end(in);
 201
 202         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 203
 204                 it->setBuffer(const_cast<Buffer &>(buffer));
 205
 206                 switch (it->lyxCode()) {
 207
 208                 case LABEL_CODE: {
 209                         // check for duplicates
 210                         InsetCommand & lab = static_cast<InsetCommand &>(*it);
 211                         docstring const oldname = lab.getParam("name");
 212                         lab.updateCommand(oldname, false);
 213                         docstring const newname = lab.getParam("name");
 214                         if (oldname != newname) {
 215                                 // adapt the references
 216                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 217                                         if (itt->lyxCode() == REF_CODE) {
 218                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 219                                                 if (ref.getParam("reference") == oldname)
 220                                                         ref.setParam("reference", newname);
 221                                         }
 222                                 }
 223                         }
 224                         break;
 225                 }
 226
 227                 case BIBITEM_CODE: {
 228                         // check for duplicates
 229                         InsetCommand & bib = static_cast<InsetCommand &>(*it);
 230                         docstring const oldkey = bib.getParam("key");
 231                         bib.updateCommand(oldkey, false);
 232                         docstring const newkey = bib.getParam("key");
 233                         if (oldkey != newkey) {
 234                                 // adapt the references
 235                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 236                                         if (itt->lyxCode() == CITE_CODE) {
 237                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 238                                                 if (ref.getParam("key") == oldkey)
 239                                                         ref.setParam("key", newkey);
 240                                         }
 241                                 }
 242                         }
 243                         break;
 244                 }
 245
 246                 default:
 247                         break; // nothing
 248                 }
 249         }
 250         insertion.swap(in.paragraphs());
 251
 252         // Split the paragraph for inserting the buf if necessary.
 253         if (!empty)
 254                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 255
 256         // Paste it!
 257         if (empty) {
 258                 pars.insert(boost::next(pars.begin(), pit),
 259                             insertion.begin(),
 260                             insertion.end());
 261
 262                 // merge the empty par with the last par of the insertion
 263                 mergeParagraph(buffer.params(), pars,
 264                                pit + insertion.size() - 1);
 265         } else {
 266                 pars.insert(boost::next(pars.begin(), pit + 1),
 267                             insertion.begin(),
 268                             insertion.end());
 269
 270                 // merge the first par of the insertion with the current par
 271                 mergeParagraph(buffer.params(), pars, pit);
 272         }
 273
 274         pit_type last_paste = pit + insertion.size() - 1;
 275
 276         // Store the new cursor position.
 277         pit = last_paste;
 278         pos = pars[last_paste].size();
 279
 280         // Join (conditionally) last pasted paragraph with next one, i.e.,
 281         // the tail of the spliced document paragraph
 282         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 283                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 284                         mergeParagraph(buffer.params(), pars, last_paste);
 285                 } else if (pars[last_paste + 1].empty()) {
 286                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 287                         mergeParagraph(buffer.params(), pars, last_paste);
 288                 } else if (pars[last_paste].empty()) {
 289                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 290                         mergeParagraph(buffer.params(), pars, last_paste);
 291                 } else {
 292                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 293                         ++last_paste;
 294                 }
 295         }
 296
 297         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 298 }
 299
 300
 301 PitPosPair eraseSelectionHelper(BufferParams const & params,
 302         ParagraphList & pars,
 303         pit_type startpit, pit_type endpit,
 304         int startpos, int endpos)
 305 {
 306         // Start of selection is really invalid.
 307         if (startpit == pit_type(pars.size()) ||
 308             (startpos > pars[startpit].size()))
 309                 return PitPosPair(endpit, endpos);
 310
 311         // Start and end is inside same paragraph
 312         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 313                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 314                 return PitPosPair(endpit, endpos);
 315         }
 316
 317         for (pit_type pit = startpit; pit != endpit + 1;) {
 318                 pos_type const left  = (pit == startpit ? startpos : 0);
 319                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 320                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 321
 322                 // Logically erase only, including the end-of-paragraph character
 323                 pars[pit].eraseChars(left, right, params.trackChanges);
 324
 325                 // Separate handling of paragraph break:
 326                 if (merge && pit != endpit &&
 327                     (pit + 1 != endpit
 328                      || pars[pit].hasSameLayout(pars[endpit])
 329                      || pars[endpit].size() == endpos)) {
 330                         if (pit + 1 == endpit)
 331                                 endpos += pars[pit].size();
 332                         mergeParagraph(params, pars, pit);
 333                         --endpit;
 334                 } else
 335                         ++pit;
 336         }
 337
 338         // Ensure legal cursor pos:
 339         endpit = startpit;
 340         endpos = startpos;
 341         return PitPosPair(endpit, endpos);
 342 }
 343
 344
 345 void putClipboard(ParagraphList const & paragraphs,
 346         DocumentClass const * const docclass, docstring const & plaintext)
 347 {
 348         // For some strange reason gcc 3.2 and 3.3 do not accept
 349         // Buffer buffer(string(), false);
 350         Buffer buffer("", false);
 351         buffer.setUnnamed(true);
 352         buffer.paragraphs() = paragraphs;
 353         buffer.params().setDocumentClass(docclass);
 354         ostringstream lyx;
 355         if (buffer.write(lyx))
 356                 theClipboard().put(lyx.str(), plaintext);
 357         else
 358                 theClipboard().put(string(), plaintext);
 359 }
 360
 361
 362 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 363         pit_type startpit, pit_type endpit,
 364         int start, int end, DocumentClass const * const dc, CutStack & cutstack)
 365 {
 366         LASSERT(0 <= start && start <= pars[startpit].size(), /**/);
 367         LASSERT(0 <= end && end <= pars[endpit].size(), /**/);
 368         LASSERT(startpit != endpit || start <= end, /**/);
 369
 370         // Clone the paragraphs within the selection.
 371         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 372                                 boost::next(pars.begin(), endpit + 1));
 373
 374         // Remove the end of the last paragraph; afterwards, remove the
 375         // beginning of the first paragraph. Keep this order - there may only
 376         // be one paragraph!  Do not track deletions here; this is an internal
 377         // action not visible to the user
 378
 379         Paragraph & back = copy_pars.back();
 380         back.eraseChars(end, back.size(), false);
 381         Paragraph & front = copy_pars.front();
 382         front.eraseChars(0, start, false);
 383
 384         ParagraphList::iterator it = copy_pars.begin();
 385         ParagraphList::iterator it_end = copy_pars.end();
 386
 387         for (; it != it_end; it++) {
 388                 // ERT paragraphs have the Language latex_language.
 389                 // This is invalid outside of ERT, so we need to change it
 390                 // to the buffer language.
 391                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 392                         it->changeLanguage(buf.params(), latex_language, buf.language());
 393                 }
 394                 it->setInsetOwner(0);
 395         }
 396
 397         // do not copy text (also nested in insets) which is marked as deleted
 398         acceptChanges(copy_pars, buf.params());
 399
 400         DocumentClass * d = const_cast<DocumentClass *>(dc);
 401         cutstack.push(make_pair(copy_pars, d));
 402 }
 403
 404 } // namespace anon
 405
 406
 407
 408
 409 namespace cap {
 410
 411 void region(CursorSlice const & i1, CursorSlice const & i2,
 412             Inset::row_type & r1, Inset::row_type & r2,
 413             Inset::col_type & c1, Inset::col_type & c2)
 414 {
 415         Inset & p = i1.inset();
 416         c1 = p.col(i1.idx());
 417         c2 = p.col(i2.idx());
 418         if (c1 > c2)
 419                 swap(c1, c2);
 420         r1 = p.row(i1.idx());
 421         r2 = p.row(i2.idx());
 422         if (r1 > r2)
 423                 swap(r1, r2);
 424 }
 425
 426
 427 docstring grabAndEraseSelection(Cursor & cur)
 428 {
 429         if (!cur.selection())
 430                 return docstring();
 431         docstring res = grabSelection(cur);
 432         eraseSelection(cur);
 433         return res;
 434 }
 435
 436
 437 bool reduceSelectionToOneCell(Cursor & cur)
 438 {
 439         if (!cur.selection() || !cur.inMathed())
 440                 return false;
 441
 442         CursorSlice i1 = cur.selBegin();
 443         CursorSlice i2 = cur.selEnd();
 444         if (!i1.inset().asInsetMath())
 445                 return false;
 446
 447         // the easy case: do nothing if only one cell is selected
 448         if (i1.idx() == i2.idx())
 449                 return true;
 450
 451         cur.top().pos() = 0;
 452         cur.resetAnchor();
 453         cur.top().pos() = cur.top().lastpos();
 454
 455         return true;
 456 }
 457
 458
 459 bool multipleCellsSelected(Cursor const & cur)
 460 {
 461         if (!cur.selection() || !cur.inMathed())
 462                 return false;
 463
 464         CursorSlice i1 = cur.selBegin();
 465         CursorSlice i2 = cur.selEnd();
 466         if (!i1.inset().asInsetMath())
 467                 return false;
 468
 469         if (i1.idx() == i2.idx())
 470                 return false;
 471
 472         return true;
 473 }
 474
 475
 476 void switchBetweenClasses(DocumentClass const * const oldone,
 477                 DocumentClass const * const newone, InsetText & in, ErrorList & errorlist)
 478 {
 479         errorlist.clear();
 480
 481         LASSERT(!in.paragraphs().empty(), /**/);
 482         if (oldone == newone)
 483                 return;
 484
 485         DocumentClass const & oldtc = *oldone;
 486         DocumentClass const & newtc = *newone;
 487
 488         // layouts
 489         ParIterator end = par_iterator_end(in);
 490         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 491                 docstring const name = it->layout().name();
 492                 bool hasLayout = newtc.hasLayout(name);
 493
 494                 if (in.useEmptyLayout())
 495                         it->setLayout(newtc.emptyLayout());
 496                 else if (hasLayout)
 497                         it->setLayout(newtc[name]);
 498                 else
 499                         it->setLayout(newtc.defaultLayout());
 500
 501                 if (!hasLayout && name != oldtc.defaultLayoutName()) {
 502                         docstring const s = bformat(
 503                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 504                                                 "because of class conversion from\n%3$s to %4$s"),
 505                          name, it->layout().name(),
 506                          from_utf8(oldtc.name()), from_utf8(newtc.name()));
 507                         // To warn the user that something had to be done.
 508                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 509                                                       it->id(), 0,
 510                                                       it->size()));
 511                 }
 512         }
 513
 514         // character styles
 515         InsetIterator const i_end = inset_iterator_end(in);
 516         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 517                 InsetCollapsable * inset = it->asInsetCollapsable();
 518                 if (!inset)
 519                         continue;
 520                 if (inset->lyxCode() != FLEX_CODE)
 521                         // FIXME: Should we verify all InsetCollapsable?
 522                         continue;
 523                 inset->setLayout(newone);
 524                 if (!inset->undefined())
 525                         continue;
 526                 // The flex inset is undefined in newtc
 527                 docstring const s = bformat(_(
 528                         "Flex inset %1$s is "
 529                         "undefined because of class "
 530                         "conversion from\n%2$s to %3$s"),
 531                         inset->name(), from_utf8(oldtc.name()),
 532                         from_utf8(newtc.name()));
 533                 // To warn the user that something had to be done.
 534                 errorlist.push_back(ErrorItem(
 535                                 _("Undefined flex inset"),
 536                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 537         }
 538 }
 539
 540
 541 vector<docstring> availableSelections()
 542 {
 543         vector<docstring> selList;
 544
 545         CutStack::const_iterator cit = theCuts.begin();
 546         CutStack::const_iterator end = theCuts.end();
 547         for (; cit != end; ++cit) {
 548                 // we do not use cit-> here because gcc 2.9x does not
 549                 // like it (JMarc)
 550                 ParagraphList const & pars = (*cit).first;
 551                 docstring asciiSel;
 552                 ParagraphList::const_iterator pit = pars.begin();
 553                 ParagraphList::const_iterator pend = pars.end();
 554                 for (; pit != pend; ++pit) {
 555                         asciiSel += pit->asString(false);
 556                         if (asciiSel.size() > 25) {
 557                                 asciiSel.replace(22, docstring::npos,
 558                                                  from_ascii("..."));
 559                                 break;
 560                         }
 561                 }
 562
 563                 selList.push_back(asciiSel);
 564         }
 565
 566         return selList;
 567 }
 568
 569
 570 size_type numberOfSelections()
 571 {
 572         return theCuts.size();
 573 }
 574
 575
 576 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 577 {
 578         // This doesn't make sense, if there is no selection
 579         if (!cur.selection())
 580                 return;
 581
 582         // OK, we have a selection. This is always between cur.selBegin()
 583         // and cur.selEnd()
 584
 585         if (cur.inTexted()) {
 586                 Text * text = cur.text();
 587                 LASSERT(text, /**/);
 588
 589                 saveSelection(cur);
 590
 591                 // make sure that the depth behind the selection are restored, too
 592                 cur.recordUndoSelection();
 593                 pit_type begpit = cur.selBegin().pit();
 594                 pit_type endpit = cur.selEnd().pit();
 595
 596                 int endpos = cur.selEnd().pos();
 597
 598                 BufferParams const & bp = cur.buffer().params();
 599                 if (realcut) {
 600                         copySelectionHelper(cur.buffer(),
 601                                 text->paragraphs(),
 602                                 begpit, endpit,
 603                                 cur.selBegin().pos(), endpos,
 604                                 bp.documentClassPtr(), theCuts);
 605                         // Stuff what we got on the clipboard.
 606                         // Even if there is no selection.
 607                         putClipboard(theCuts[0].first, theCuts[0].second,
 608                                 cur.selectionAsString(true));
 609                 }
 610
 611                 boost::tie(endpit, endpos) =
 612                         eraseSelectionHelper(bp,
 613                                 text->paragraphs(),
 614                                 begpit, endpit,
 615                                 cur.selBegin().pos(), endpos);
 616
 617                 // cutSelection can invalidate the cursor so we need to set
 618                 // it anew. (Lgb)
 619                 // we prefer the end for when tracking changes
 620                 cur.pos() = endpos;
 621                 cur.pit() = endpit;
 622
 623                 // sometimes necessary
 624                 if (doclear
 625                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 626                         cur.fixIfBroken();
 627
 628                 // need a valid cursor. (Lgb)
 629                 cur.clearSelection();
 630                 updateLabels(cur.buffer());
 631
 632                 // tell tabular that a recent copy happened
 633                 dirtyTabularStack(false);
 634         }
 635
 636         if (cur.inMathed()) {
 637                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 638                         // The current selection spans more than one cell.
 639                         // Record all cells
 640                         cur.recordUndoInset();
 641                 } else {
 642                         // Record only the current cell to avoid a jumping
 643                         // cursor after undo
 644                         cur.recordUndo();
 645                 }
 646                 if (realcut)
 647                         copySelection(cur);
 648                 eraseSelection(cur);
 649         }
 650 }
 651
 652
 653 void copySelection(Cursor & cur)
 654 {
 655         copySelection(cur, cur.selectionAsString(true));
 656 }
 657
 658
 659 namespace {
 660
 661 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 662 {
 663         // this doesn't make sense, if there is no selection
 664         if (!cur.selection())
 665                 return;
 666
 667         // copySelection can not yet handle the case of cross idx selection
 668         if (cur.selBegin().idx() != cur.selEnd().idx())
 669                 return;
 670
 671         if (cur.inTexted()) {
 672                 Text * text = cur.text();
 673                 LASSERT(text, /**/);
 674                 // ok we have a selection. This is always between cur.selBegin()
 675                 // and sel_end cursor
 676
 677                 // copy behind a space if there is one
 678                 ParagraphList & pars = text->paragraphs();
 679                 pos_type pos = cur.selBegin().pos();
 680                 pit_type par = cur.selBegin().pit();
 681                 while (pos < pars[par].size() &&
 682                        pars[par].isLineSeparator(pos) &&
 683                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 684                         ++pos;
 685
 686                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 687                         pos, cur.selEnd().pos(),
 688                         cur.buffer().params().documentClassPtr(), cutstack);
 689                 dirtyTabularStack(false);
 690         }
 691
 692         if (cur.inMathed()) {
 693                 //lyxerr << "copySelection in mathed" << endl;
 694                 ParagraphList pars;
 695                 Paragraph par;
 696                 BufferParams const & bp = cur.buffer().params();
 697                 // FIXME This should be the empty layout...right?
 698                 par.setLayout(bp.documentClass().emptyLayout());
 699                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 700                 pars.push_back(par);
 701                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 702         }
 703 }
 704
 705 }
 706
 707
 708 void copySelectionToStack()
 709 {
 710         if (!selectionBuffer.empty())
 711                 theCuts.push(selectionBuffer[0]);
 712 }
 713
 714
 715 void copySelection(Cursor & cur, docstring const & plaintext)
 716 {
 717         // In tablemode, because copy and paste actually use special table stack
 718         // we do not attempt to get selected paragraphs under cursor. Instead, a
 719         // paragraph with the plain text version is generated so that table cells
 720         // can be pasted as pure text somewhere else.
 721         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 722                 ParagraphList pars;
 723                 Paragraph par;
 724                 BufferParams const & bp = cur.buffer().params();
 725                 par.setLayout(bp.documentClass().emptyLayout());
 726                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 727                 pars.push_back(par);
 728                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
 729         } else {
 730                 copySelectionToStack(cur, theCuts);
 731         }
 732
 733         // stuff the selection onto the X clipboard, from an explicit copy request
 734         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 735 }
 736
 737
 738 void saveSelection(Cursor & cur)
 739 {
 740         // This function is called, not when a selection is formed, but when
 741         // a selection is cleared. Therefore, multiple keyboard selection
 742         // will not repeatively trigger this function (bug 3877).
 743         if (cur.selection()
 744             && cur.selBegin() == cur.bv().cursor().selBegin()
 745             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 746                 LYXERR(Debug::ACTION, "'" << cur.selectionAsString(true) << "'");
 747                 copySelectionToStack(cur, selectionBuffer);
 748         }
 749 }
 750
 751
 752 bool selection()
 753 {
 754         return !selectionBuffer.empty();
 755 }
 756
 757
 758 void clearSelection()
 759 {
 760         selectionBuffer.clear();
 761 }
 762
 763
 764 void clearCutStack()
 765 {
 766         theCuts.clear();
 767 }
 768
 769
 770 docstring selection(size_t sel_index)
 771 {
 772         return sel_index < theCuts.size()
 773                 ? theCuts[sel_index].first.back().asString(false)
 774                 : docstring();
 775 }
 776
 777
 778 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 779                         DocumentClass const * const docclass, ErrorList & errorList)
 780 {
 781         if (cur.inTexted()) {
 782                 Text * text = cur.text();
 783                 LASSERT(text, /**/);
 784
 785                 pit_type endpit;
 786                 PitPosPair ppp;
 787
 788                 boost::tie(ppp, endpit) =
 789                         pasteSelectionHelper(cur, parlist, docclass, errorList);
 790                 updateLabels(cur.buffer());
 791                 cur.clearSelection();
 792                 text->setCursor(cur, ppp.first, ppp.second);
 793         }
 794
 795         // mathed is handled in InsetMathNest/InsetMathGrid
 796         LASSERT(!cur.inMathed(), /**/);
 797 }
 798
 799
 800 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 801 {
 802         // this does not make sense, if there is nothing to paste
 803         if (!checkPastePossible(sel_index))
 804                 return;
 805
 806         cur.recordUndo();
 807         pasteParagraphList(cur, theCuts[sel_index].first,
 808                            theCuts[sel_index].second, errorList);
 809         cur.setSelection();
 810 }
 811
 812
 813 void pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 814 {
 815         // Use internal clipboard if it is the most recent one
 816         if (theClipboard().isInternal()) {
 817                 pasteFromStack(cur, errorList, 0);
 818                 return;
 819         }
 820
 821         // First try LyX format
 822         if (theClipboard().hasLyXContents()) {
 823                 string lyx = theClipboard().getAsLyX();
 824                 if (!lyx.empty()) {
 825                         // For some strange reason gcc 3.2 and 3.3 do not accept
 826                         // Buffer buffer(string(), false);
 827                         Buffer buffer("", false);
 828                         buffer.setUnnamed(true);
 829                         if (buffer.readString(lyx)) {
 830                                 cur.recordUndo();
 831                                 pasteParagraphList(cur, buffer.paragraphs(),
 832                                         buffer.params().documentClassPtr(), errorList);
 833                                 cur.setSelection();
 834                                 return;
 835                         }
 836                 }
 837         }
 838
 839         // Then try plain text
 840         docstring const text = theClipboard().getAsText();
 841         if (text.empty())
 842                 return;
 843         cur.recordUndo();
 844         if (asParagraphs)
 845                 cur.text()->insertStringAsParagraphs(cur, text);
 846         else
 847                 cur.text()->insertStringAsLines(cur, text);
 848 }
 849
 850
 851 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
 852                             Clipboard::GraphicsType preferedType)
 853 {
 854         LASSERT(theClipboard().hasGraphicsContents(preferedType), /**/);
 855
 856         // get picture from clipboard
 857         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
 858         if (filename.empty())
 859                 return;
 860
 861         // create inset for graphic
 862         InsetGraphics * inset = new InsetGraphics(cur.buffer());
 863         InsetGraphicsParams params;
 864         params.filename = support::DocFileName(filename.absFilename());
 865         inset->setParams(params);
 866         cur.recordUndo();
 867         cur.insert(inset);
 868 }
 869
 870
 871 void pasteSelection(Cursor & cur, ErrorList & errorList)
 872 {
 873         if (selectionBuffer.empty())
 874                 return;
 875         cur.recordUndo();
 876         pasteParagraphList(cur, selectionBuffer[0].first,
 877                            selectionBuffer[0].second, errorList);
 878 }
 879
 880
 881 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 882 {
 883         cur.recordUndo();
 884         DocIterator selbeg = cur.selectionBegin();
 885
 886         // Get font setting before we cut
 887         Font const font =
 888                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 889
 890         // Insert the new string
 891         pos_type pos = cur.selEnd().pos();
 892         Paragraph & par = cur.selEnd().paragraph();
 893         docstring::const_iterator cit = str.begin();
 894         docstring::const_iterator end = str.end();
 895         for (; cit != end; ++cit, ++pos)
 896                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 897
 898         // Cut the selection
 899         cutSelection(cur, true, false);
 900
 901         // select the replacement
 902         if (backwards) {
 903                 selbeg.pos() += str.length();
 904                 cur.setSelection(selbeg, -int(str.length()));
 905         } else
 906                 cur.setSelection(selbeg, str.length());
 907 }
 908
 909
 910 void replaceSelection(Cursor & cur)
 911 {
 912         if (cur.selection())
 913                 cutSelection(cur, true, false);
 914 }
 915
 916
 917 void eraseSelection(Cursor & cur)
 918 {
 919         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 920         CursorSlice const & i1 = cur.selBegin();
 921         CursorSlice const & i2 = cur.selEnd();
 922         if (i1.inset().asInsetMath()) {
 923                 saveSelection(cur);
 924                 cur.top() = i1;
 925                 if (i1.idx() == i2.idx()) {
 926                         i1.cell().erase(i1.pos(), i2.pos());
 927                         // We may have deleted i1.cell(cur.pos()).
 928                         // Make sure that pos is valid.
 929                         if (cur.pos() > cur.lastpos())
 930                                 cur.pos() = cur.lastpos();
 931                 } else {
 932                         InsetMath * p = i1.asInsetMath();
 933                         Inset::row_type r1, r2;
 934                         Inset::col_type c1, c2;
 935                         region(i1, i2, r1, r2, c1, c2);
 936                         for (Inset::row_type row = r1; row <= r2; ++row)
 937                                 for (Inset::col_type col = c1; col <= c2; ++col)
 938                                         p->cell(p->index(row, col)).clear();
 939                         // We've deleted the whole cell. Only pos 0 is valid.
 940                         cur.pos() = 0;
 941                 }
 942                 // need a valid cursor. (Lgb)
 943                 cur.clearSelection();
 944         } else {
 945                 lyxerr << "can't erase this selection 1" << endl;
 946         }
 947         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 948 }
 949
 950
 951 void selDel(Cursor & cur)
 952 {
 953         //lyxerr << "cap::selDel" << endl;
 954         if (cur.selection())
 955                 eraseSelection(cur);
 956 }
 957
 958
 959 void selClearOrDel(Cursor & cur)
 960 {
 961         //lyxerr << "cap::selClearOrDel" << endl;
 962         if (lyxrc.auto_region_delete)
 963                 selDel(cur);
 964         else
 965                 cur.selection() = false;
 966 }
 967
 968
 969 docstring grabSelection(Cursor const & cur)
 970 {
 971         if (!cur.selection())
 972                 return docstring();
 973
 974 #if 0
 975         // grab selection by glueing multiple cells together. This is not what
 976         // we want because selections spanning multiple cells will get "&" and "\\"
 977         // seperators.
 978         ostringstream os;
 979         for (DocIterator dit = cur.selectionBegin();
 980              dit != cur.selectionEnd(); dit.forwardPos())
 981                 os << asString(dit.cell());
 982         return os.str();
 983 #endif
 984
 985         CursorSlice i1 = cur.selBegin();
 986         CursorSlice i2 = cur.selEnd();
 987
 988         if (i1.idx() == i2.idx()) {
 989                 if (i1.inset().asInsetMath()) {
 990                         MathData::const_iterator it = i1.cell().begin();
 991                         return asString(MathData(it + i1.pos(), it + i2.pos()));
 992                 } else {
 993                         return from_ascii("unknown selection 1");
 994                 }
 995         }
 996
 997         Inset::row_type r1, r2;
 998         Inset::col_type c1, c2;
 999         region(i1, i2, r1, r2, c1, c2);
1000
1001         docstring data;
1002         if (i1.inset().asInsetMath()) {
1003                 for (Inset::row_type row = r1; row <= r2; ++row) {
1004                         if (row > r1)
1005                                 data += "\\\\";
1006                         for (Inset::col_type col = c1; col <= c2; ++col) {
1007                                 if (col > c1)
1008                                         data += '&';
1009                                 data += asString(i1.asInsetMath()->
1010                                         cell(i1.asInsetMath()->index(row, col)));
1011                         }
1012                 }
1013         } else {
1014                 data = from_ascii("unknown selection 2");
1015         }
1016         return data;
1017 }
1018
1019
1020 void dirtyTabularStack(bool b)
1021 {
1022         dirty_tabular_stack_ = b;
1023 }
1024
1025
1026 bool tabularStackDirty()
1027 {
1028         return dirty_tabular_stack_;
1029 }
1030
1031
1032 } // namespace cap
1033
1034 } // namespace lyx