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 "BranchList.h"
  19 #include "Buffer.h"
  20 #include "buffer_funcs.h"
  21 #include "BufferList.h"
  22 #include "BufferParams.h"
  23 #include "BufferView.h"
  24 #include "Changes.h"
  25 #include "Cursor.h"
  26 #include "Encoding.h"
  27 #include "ErrorList.h"
  28 #include "FuncCode.h"
  29 #include "FuncRequest.h"
  30 #include "InsetIterator.h"
  31 #include "InsetList.h"
  32 #include "Language.h"
  33 #include "LyX.h"
  34 #include "LyXRC.h"
  35 #include "Text.h"
  36 #include "Paragraph.h"
  37 #include "ParagraphParameters.h"
  38 #include "ParIterator.h"
  39 #include "TextClass.h"
  40
  41 #include "insets/InsetBibitem.h"
  42 #include "insets/InsetBranch.h"
  43 #include "insets/InsetCommand.h"
  44 #include "insets/InsetFlex.h"
  45 #include "insets/InsetGraphics.h"
  46 #include "insets/InsetGraphicsParams.h"
  47 #include "insets/InsetInclude.h"
  48 #include "insets/InsetLabel.h"
  49 #include "insets/InsetTabular.h"
  50
  51 #include "mathed/MathData.h"
  52 #include "mathed/InsetMath.h"
  53 #include "mathed/InsetMathHull.h"
  54 #include "mathed/InsetMathRef.h"
  55 #include "mathed/MathSupport.h"
  56
  57 #include "support/debug.h"
  58 #include "support/docstream.h"
  59 #include "support/gettext.h"
  60 #include "support/lassert.h"
  61 #include "support/limited_stack.h"
  62 #include "support/lstrings.h"
  63
  64 #include "frontends/alert.h"
  65 #include "frontends/Clipboard.h"
  66 #include "frontends/Selection.h"
  67
  68 #include <boost/tuple/tuple.hpp>
  69 #include <boost/next_prior.hpp>
  70
  71 #include <string>
  72
  73 using namespace std;
  74 using namespace lyx::support;
  75 using lyx::frontend::Clipboard;
  76
  77 namespace lyx {
  78
  79 namespace {
  80
  81 typedef pair<pit_type, int> PitPosPair;
  82
  83 typedef limited_stack<pair<ParagraphList, DocumentClassConstPtr> > CutStack;
  84
  85 CutStack theCuts(10);
  86 // persistent selection, cleared until the next selection
  87 CutStack selectionBuffer(1);
  88
  89 // store whether the tabular stack is newer than the normal copy stack
  90 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  91 // when we (hopefully) have a one-for-all paste mechanism.
  92 bool dirty_tabular_stack_ = false;
  93
  94
  95 bool checkPastePossible(int index)
  96 {
  97         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
  98 }
  99
 100
 101 struct PasteReturnValue {
 102         PasteReturnValue(pit_type r_par, pos_type r_pos, bool r_nu) :
 103           par(r_par), pos(r_pos), needupdate(r_nu)
 104         {}
 105
 106         pit_type par;
 107         pos_type pos;
 108         bool needupdate;
 109 };
 110
 111 PasteReturnValue
 112 pasteSelectionHelper(DocIterator const & cur, ParagraphList const & parlist,
 113                      DocumentClassConstPtr oldDocClass, Buffer * tmpbuffer,
 114                      ErrorList & errorlist)
 115 {
 116         Buffer const & buffer = *cur.buffer();
 117         pit_type pit = cur.pit();
 118         pos_type pos = cur.pos();
 119         bool need_update = false;
 120         InsetText * target_inset = cur.inset().asInsetText();
 121         if (!target_inset) {
 122                 InsetTabular * it = cur.inset().asInsetTabular();
 123                 target_inset = it? it->cell(cur.idx())->asInsetText() : 0;
 124         }
 125         LASSERT(target_inset, return PasteReturnValue(pit, pos, need_update));
 126         ParagraphList & pars = target_inset->paragraphs();
 127
 128         if (parlist.empty())
 129                 return PasteReturnValue(pit, pos, need_update);
 130
 131         BOOST_ASSERT (pos <= pars[pit].size());
 132
 133         // Make a copy of the CaP paragraphs.
 134         ParagraphList insertion = parlist;
 135         DocumentClassConstPtr newDocClass = buffer.params().documentClassPtr();
 136
 137         // Now remove all out of the pars which is NOT allowed in the
 138         // new environment and set also another font if that is required.
 139
 140         // Convert newline to paragraph break in ParbreakIsNewline
 141         if (target_inset->getLayout().parbreakIsNewline()
 142             || pars[pit].layout().parbreak_is_newline) {
 143                 for (size_t i = 0; i != insertion.size(); ++i) {
 144                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 145                                 if (insertion[i].isNewline(j)) {
 146                                         // do not track deletion of newline
 147                                         insertion[i].eraseChar(j, false);
 148                                         insertion[i].setInsetOwner(target_inset);
 149                                         breakParagraphConservative(
 150                                                         buffer.params(),
 151                                                         insertion, i, j);
 152                                         break;
 153                                 }
 154                         }
 155                 }
 156         }
 157
 158         // set the paragraphs to plain layout if necessary
 159         if (cur.inset().usePlainLayout()) {
 160                 bool forcePlainLayout = cur.inset().forcePlainLayout();
 161                 Layout const & plainLayout = newDocClass->plainLayout();
 162                 Layout const & defaultLayout = newDocClass->defaultLayout();
 163                 ParagraphList::iterator const end = insertion.end();
 164                 ParagraphList::iterator par = insertion.begin();
 165                 for (; par != end; ++par) {
 166                         Layout const & parLayout = par->layout();
 167                         if (forcePlainLayout || parLayout == defaultLayout)
 168                                 par->setLayout(plainLayout);
 169                 }
 170         } else { // check if we need to reset from plain layout
 171                 Layout const & defaultLayout = newDocClass->defaultLayout();
 172                 Layout const & plainLayout = newDocClass->plainLayout();
 173                 ParagraphList::iterator const end = insertion.end();
 174                 ParagraphList::iterator par = insertion.begin();
 175                 for (; par != end; ++par) {
 176                         Layout const & parLayout = par->layout();
 177                         if (parLayout == plainLayout)
 178                                 par->setLayout(defaultLayout);
 179                 }
 180         }
 181
 182         InsetText in(cur.buffer());
 183         // Make sure there is no class difference.
 184         in.paragraphs().clear();
 185         // This works without copying any paragraph data because we have
 186         // a specialized swap method for ParagraphList. This is important
 187         // since we store pointers to insets at some places and we don't
 188         // want to invalidate them.
 189         insertion.swap(in.paragraphs());
 190         cap::switchBetweenClasses(oldDocClass, newDocClass, in, errorlist);
 191         insertion.swap(in.paragraphs());
 192
 193         ParagraphList::iterator tmpbuf = insertion.begin();
 194         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 195
 196         depth_type max_depth = pars[pit].getMaxDepthAfter();
 197
 198         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 199                 // If we have a negative jump so that the depth would
 200                 // go below 0 depth then we have to redo the delta to
 201                 // this new max depth level so that subsequent
 202                 // paragraphs are aligned correctly to this paragraph
 203                 // at level 0.
 204                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 205                         depth_delta = 0;
 206
 207                 // Set the right depth so that we are not too deep or shallow.
 208                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 209                 if (tmpbuf->params().depth() > max_depth)
 210                         tmpbuf->params().depth(max_depth);
 211
 212                 // Only set this from the 2nd on as the 2nd depends
 213                 // for maxDepth still on pit.
 214                 if (tmpbuf != insertion.begin())
 215                         max_depth = tmpbuf->getMaxDepthAfter();
 216
 217                 // Set the inset owner of this paragraph.
 218                 tmpbuf->setInsetOwner(target_inset);
 219                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 220                         // do not track deletion of invalid insets
 221                         if (Inset * inset = tmpbuf->getInset(i))
 222                                 if (!target_inset->insetAllowed(inset->lyxCode()))
 223                                         tmpbuf->eraseChar(i--, false);
 224                 }
 225
 226                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 227                                          Change::INSERTED : Change::UNCHANGED));
 228         }
 229
 230         bool const empty = pars[pit].empty();
 231         if (!empty) {
 232                 // Make the buf exactly the same layout as the cursor
 233                 // paragraph.
 234                 insertion.begin()->makeSameLayout(pars[pit]);
 235         }
 236
 237         // Prepare the paragraphs and insets for insertion.
 238         insertion.swap(in.paragraphs());
 239
 240         InsetIterator const i_end = inset_iterator_end(in);
 241         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 242                 // Even though this will also be done later, it has to be done here
 243                 // since some inset might going to try to access
 244                 // the buffer() member.
 245                 it->setBuffer(const_cast<Buffer &>(buffer));
 246                 switch (it->lyxCode()) {
 247
 248                 case MATH_HULL_CODE: {
 249                         // check for equation labels and resolve duplicates
 250                         InsetMathHull * ins = it->asInsetMath()->asHullInset();
 251                         std::vector<InsetLabel *> labels = ins->getLabels();
 252                         for (size_t i = 0; i != labels.size(); ++i) {
 253                                 if (!labels[i])
 254                                         continue;
 255                                 InsetLabel * lab = labels[i];
 256                                 docstring const oldname = lab->getParam("name");
 257                                 lab->updateLabel(oldname);
 258                                 // We need to update the buffer reference cache.
 259                                 need_update = true;
 260                                 docstring const newname = lab->getParam("name");
 261                                 if (oldname == newname)
 262                                         continue;
 263                                 // adapt the references
 264                                 for (InsetIterator itt = inset_iterator_begin(in);
 265                                       itt != i_end; ++itt) {
 266                                         if (itt->lyxCode() == REF_CODE) {
 267                                                 InsetCommand * ref = itt->asInsetCommand();
 268                                                 if (ref->getParam("reference") == oldname)
 269                                                         ref->setParam("reference", newname);
 270                                         } else if (itt->lyxCode() == MATH_REF_CODE) {
 271                                                 InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 272                                                 // this is necessary to prevent an uninitialized
 273                                                 // buffer when the RefInset is in a MathBox.
 274                                                 // FIXME audit setBuffer calls
 275                                                 mi->setBuffer(const_cast<Buffer &>(buffer));
 276                                                 if (mi->getTarget() == oldname)
 277                                                         mi->changeTarget(newname);
 278                                         }
 279                                 }
 280                         }
 281                         break;
 282                 }
 283
 284                 case LABEL_CODE: {
 285                         // check for duplicates
 286                         InsetLabel & lab = static_cast<InsetLabel &>(*it);
 287                         docstring const oldname = lab.getParam("name");
 288                         lab.updateLabel(oldname);
 289                         // We need to update the buffer reference cache.
 290                         need_update = true;
 291                         docstring const newname = lab.getParam("name");
 292                         if (oldname == newname)
 293                                 break;
 294                         // adapt the references
 295                         for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 296                                 if (itt->lyxCode() == REF_CODE) {
 297                                         InsetCommand & ref = static_cast<InsetCommand &>(*itt);
 298                                         if (ref.getParam("reference") == oldname)
 299                                                 ref.setParam("reference", newname);
 300                                 } else if (itt->lyxCode() == MATH_REF_CODE) {
 301                                         InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 302                                         // this is necessary to prevent an uninitialized
 303                                         // buffer when the RefInset is in a MathBox.
 304                                         // FIXME audit setBuffer calls
 305                                         mi->setBuffer(const_cast<Buffer &>(buffer));
 306                                         if (mi->getTarget() == oldname)
 307                                                 mi->changeTarget(newname);
 308                                 }
 309                         }
 310                         break;
 311                 }
 312
 313                 case INCLUDE_CODE: {
 314                         InsetInclude & inc = static_cast<InsetInclude &>(*it);
 315                         inc.updateCommand();
 316                         // We need to update the list of included files.
 317                         need_update = true;
 318                         break;
 319                 }
 320
 321                 case BIBITEM_CODE: {
 322                         // check for duplicates
 323                         InsetBibitem & bib = static_cast<InsetBibitem &>(*it);
 324                         docstring const oldkey = bib.getParam("key");
 325                         bib.updateCommand(oldkey, false);
 326                         // We need to update the buffer reference cache.
 327                         need_update = true;
 328                         docstring const newkey = bib.getParam("key");
 329                         if (oldkey == newkey)
 330                                 break;
 331                         // adapt the references
 332                         for (InsetIterator itt = inset_iterator_begin(in);
 333                              itt != i_end; ++itt) {
 334                                 if (itt->lyxCode() == CITE_CODE) {
 335                                         InsetCommand * ref = itt->asInsetCommand();
 336                                         if (ref->getParam("key") == oldkey)
 337                                                 ref->setParam("key", newkey);
 338                                 }
 339                         }
 340                         break;
 341                 }
 342
 343                 case BRANCH_CODE: {
 344                         // check if branch is known to target buffer
 345                         // or its master
 346                         InsetBranch & br = static_cast<InsetBranch &>(*it);
 347                         docstring const name = br.branch();
 348                         if (name.empty())
 349                                 break;
 350                         bool const is_child = (&buffer != buffer.masterBuffer());
 351                         BranchList branchlist = buffer.params().branchlist();
 352                         if ((!is_child && branchlist.find(name))
 353                             || (is_child && (branchlist.find(name)
 354                                 || buffer.masterBuffer()->params().branchlist().find(name))))
 355                                 break;
 356                         if (tmpbuffer) {
 357                                 // This is for a temporary buffer, so simply create the branch.
 358                                 // Must not use lyx::dispatch(), since tmpbuffer has no view.
 359                                 DispatchResult dr;
 360                                 tmpbuffer->dispatch(FuncRequest(LFUN_BRANCH_ADD, name), dr);
 361                         } else {
 362                                 docstring text = bformat(
 363                                         _("The pasted branch \"%1$s\" is undefined.\n"
 364                                           "Do you want to add it to the document's branch list?"),
 365                                         name);
 366                                 if (frontend::Alert::prompt(_("Unknown branch"),
 367                                           text, 0, 1, _("&Add"), _("&Don't Add")) != 0)
 368                                         break;
 369                                 lyx::dispatch(FuncRequest(LFUN_BRANCH_ADD, name));
 370                         }
 371                         // We need to update the list of branches.
 372                         need_update = true;
 373                         break;
 374                 }
 375
 376                 default:
 377                         break; // nothing
 378                 }
 379         }
 380         insertion.swap(in.paragraphs());
 381
 382         // Split the paragraph for inserting the buf if necessary.
 383         if (!empty)
 384                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 385
 386         // Paste it!
 387         if (empty) {
 388                 pars.insert(boost::next(pars.begin(), pit),
 389                             insertion.begin(),
 390                             insertion.end());
 391
 392                 // merge the empty par with the last par of the insertion
 393                 mergeParagraph(buffer.params(), pars,
 394                                pit + insertion.size() - 1);
 395         } else {
 396                 pars.insert(boost::next(pars.begin(), pit + 1),
 397                             insertion.begin(),
 398                             insertion.end());
 399
 400                 // merge the first par of the insertion with the current par
 401                 mergeParagraph(buffer.params(), pars, pit);
 402         }
 403
 404         // Store the new cursor position.
 405         pit_type last_paste = pit + insertion.size() - 1;
 406         pit_type startpit = pit;
 407         pit = last_paste;
 408         pos = pars[last_paste].size();
 409
 410         // FIXME Should we do it here, or should we let updateBuffer() do it?
 411         // Set paragraph buffers. It's important to do this right away
 412         // before something calls Inset::buffer() and causes a crash.
 413         for (pit_type p = startpit; p <= pit; ++p)
 414                 pars[p].setBuffer(const_cast<Buffer &>(buffer));
 415
 416         // Join (conditionally) last pasted paragraph with next one, i.e.,
 417         // the tail of the spliced document paragraph
 418         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 419                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 420                         mergeParagraph(buffer.params(), pars, last_paste);
 421                 } else if (pars[last_paste + 1].empty()) {
 422                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 423                         mergeParagraph(buffer.params(), pars, last_paste);
 424                 } else if (pars[last_paste].empty()) {
 425                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 426                         mergeParagraph(buffer.params(), pars, last_paste);
 427                 } else {
 428                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 429                         ++last_paste;
 430                 }
 431         }
 432
 433         return PasteReturnValue(pit, pos, need_update);
 434 }
 435
 436
 437 PitPosPair eraseSelectionHelper(BufferParams const & params,
 438         ParagraphList & pars,
 439         pit_type startpit, pit_type endpit,
 440         int startpos, int endpos)
 441 {
 442         // Start of selection is really invalid.
 443         if (startpit == pit_type(pars.size()) ||
 444             (startpos > pars[startpit].size()))
 445                 return PitPosPair(endpit, endpos);
 446
 447         // Start and end is inside same paragraph
 448         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 449                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 450                 return PitPosPair(endpit, endpos);
 451         }
 452
 453         for (pit_type pit = startpit; pit != endpit + 1;) {
 454                 pos_type const left  = (pit == startpit ? startpos : 0);
 455                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 456                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 457
 458                 // Logically erase only, including the end-of-paragraph character
 459                 pars[pit].eraseChars(left, right, params.trackChanges);
 460
 461                 // Separate handling of paragraph break:
 462                 if (merge && pit != endpit &&
 463                     (pit + 1 != endpit
 464                      || pars[pit].hasSameLayout(pars[endpit])
 465                      || pars[endpit].size() == endpos)) {
 466                         if (pit + 1 == endpit)
 467                                 endpos += pars[pit].size();
 468                         mergeParagraph(params, pars, pit);
 469                         --endpit;
 470                 } else
 471                         ++pit;
 472         }
 473
 474         // Ensure legal cursor pos:
 475         endpit = startpit;
 476         endpos = startpos;
 477         return PitPosPair(endpit, endpos);
 478 }
 479
 480
 481 void putClipboard(ParagraphList const & paragraphs,
 482         DocumentClassConstPtr docclass, docstring const & plaintext)
 483 {
 484         // This used to need to be static to avoid a memory leak. It no longer needs
 485         // to be so, but the alternative is to construct a new one of these (with a
 486         // new temporary directory, etc) every time, and then to destroy it. So maybe
 487         // it's worth just keeping this one around.
 488         static Buffer * staticbuffer = theBufferList().newInternalBuffer(
 489                 FileName::tempName("clipboard.internal").absFileName());
 490
 491         // These two things only really need doing the first time.
 492         staticbuffer->setUnnamed(true);
 493         staticbuffer->inset().setBuffer(*staticbuffer);
 494
 495         // Use a clone for the complicated stuff so that we do not need to clean
 496         // up in order to avoid a crash.
 497         Buffer * buffer = staticbuffer->cloneBufferOnly();
 498         LASSERT(buffer, return);
 499
 500         // This needs doing every time.
 501         buffer->params().setDocumentClass(docclass);
 502
 503         // we will use pasteSelectionHelper to copy the paragraphs into the
 504         // temporary Buffer, since it does a lot of things to fix them up.
 505         DocIterator dit = doc_iterator_begin(buffer, &buffer->inset());
 506         ErrorList el;
 507         pasteSelectionHelper(dit, paragraphs, docclass, buffer, el);
 508
 509         // We don't want to produce images that are not used. Therefore,
 510         // output formulas as MathML. Even if this is not understood by all
 511         // applications, the number that can parse it should go up in the future.
 512         buffer->params().html_math_output = BufferParams::MathML;
 513
 514         // Make sure MarkAsExporting is deleted before buffer is
 515         {
 516                 // The Buffer is being used to export. This is necessary so that the
 517                 // updateMacros call will record the needed information.
 518                 MarkAsExporting mex(buffer);
 519
 520                 buffer->updateBuffer(Buffer::UpdateMaster, OutputUpdate);
 521                 buffer->updateMacros();
 522                 buffer->updateMacroInstances(OutputUpdate);
 523
 524                 // LyX's own format
 525                 string lyx;
 526                 ostringstream oslyx;
 527                 if (buffer->write(oslyx))
 528                         lyx = oslyx.str();
 529
 530                 // XHTML format
 531                 odocstringstream oshtml;
 532                 OutputParams runparams(encodings.fromLyXName("utf8"));
 533                 // We do not need to produce images, etc.
 534                 runparams.dryrun = true;
 535                 buffer->writeLyXHTMLSource(oshtml, runparams, Buffer::FullSource);
 536
 537                 theClipboard().put(lyx, oshtml.str(), plaintext);
 538         }
 539
 540         // Save that memory
 541         delete buffer;
 542 }
 543
 544
 545 /// return true if the whole ParagraphList is deleted
 546 static bool isFullyDeleted(ParagraphList const & pars)
 547 {
 548         pit_type const pars_size = static_cast<pit_type>(pars.size());
 549
 550         // check all paragraphs
 551         for (pit_type pit = 0; pit < pars_size; ++pit) {
 552                 if (!pars[pit].empty())   // prevent assertion failure
 553                         if (!pars[pit].isDeleted(0, pars[pit].size()))
 554                                 return false;
 555         }
 556         return true;
 557 }
 558
 559
 560 void copySelectionHelper(Buffer const & buf, Text const & text,
 561         pit_type startpit, pit_type endpit,
 562         int start, int end, DocumentClassConstPtr dc, CutStack & cutstack)
 563 {
 564         ParagraphList const & pars = text.paragraphs();
 565
 566         // In most of these cases, we can try to recover.
 567         LASSERT(0 <= start, start = 0);
 568         LASSERT(start <= pars[startpit].size(), start = pars[startpit].size());
 569         LASSERT(0 <= end, end = 0);
 570         LASSERT(end <= pars[endpit].size(), end = pars[endpit].size());
 571         LASSERT(startpit != endpit || start <= end, return);
 572
 573         // Clone the paragraphs within the selection.
 574         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 575                                 boost::next(pars.begin(), endpit + 1));
 576
 577         // Remove the end of the last paragraph; afterwards, remove the
 578         // beginning of the first paragraph. Keep this order - there may only
 579         // be one paragraph!  Do not track deletions here; this is an internal
 580         // action not visible to the user
 581
 582         Paragraph & back = copy_pars.back();
 583         back.eraseChars(end, back.size(), false);
 584         Paragraph & front = copy_pars.front();
 585         front.eraseChars(0, start, false);
 586
 587         ParagraphList::iterator it = copy_pars.begin();
 588         ParagraphList::iterator it_end = copy_pars.end();
 589
 590         for (; it != it_end; ++it) {
 591                 // Since we have a copy of the paragraphs, the insets
 592                 // do not have a proper buffer reference. It makes
 593                 // sense to add them temporarily, because the
 594                 // operations below depend on that (acceptChanges included).
 595                 it->setBuffer(const_cast<Buffer &>(buf));
 596                 // PassThru paragraphs have the Language
 597                 // latex_language. This is invalid for others, so we
 598                 // need to change it to the buffer language.
 599                 if (it->isPassThru())
 600                         it->changeLanguage(buf.params(),
 601                                            latex_language, buf.language());
 602         }
 603
 604         // do not copy text (also nested in insets) which is marked as
 605         // deleted, unless the whole selection was deleted
 606         if (!isFullyDeleted(copy_pars))
 607                 acceptChanges(copy_pars, buf.params());
 608         else
 609                 rejectChanges(copy_pars, buf.params());
 610
 611
 612         // do some final cleanup now, to make sure that the paragraphs
 613         // are not linked to something else.
 614         it = copy_pars.begin();
 615         for (; it != it_end; ++it) {
 616                 it->setBuffer(*static_cast<Buffer *>(0));
 617                 it->setInsetOwner(0);
 618         }
 619
 620         cutstack.push(make_pair(copy_pars, dc));
 621 }
 622
 623 } // namespace anon
 624
 625
 626
 627
 628 namespace cap {
 629
 630 void region(CursorSlice const & i1, CursorSlice const & i2,
 631             Inset::row_type & r1, Inset::row_type & r2,
 632             Inset::col_type & c1, Inset::col_type & c2)
 633 {
 634         Inset & p = i1.inset();
 635         c1 = p.col(i1.idx());
 636         c2 = p.col(i2.idx());
 637         if (c1 > c2)
 638                 swap(c1, c2);
 639         r1 = p.row(i1.idx());
 640         r2 = p.row(i2.idx());
 641         if (r1 > r2)
 642                 swap(r1, r2);
 643 }
 644
 645
 646 docstring grabAndEraseSelection(Cursor & cur)
 647 {
 648         if (!cur.selection())
 649                 return docstring();
 650         docstring res = grabSelection(cur);
 651         eraseSelection(cur);
 652         return res;
 653 }
 654
 655
 656 bool reduceSelectionToOneCell(Cursor & cur)
 657 {
 658         if (!cur.selection() || !cur.inMathed())
 659                 return false;
 660
 661         CursorSlice i1 = cur.selBegin();
 662         CursorSlice i2 = cur.selEnd();
 663         if (!i1.inset().asInsetMath())
 664                 return false;
 665
 666         // the easy case: do nothing if only one cell is selected
 667         if (i1.idx() == i2.idx())
 668                 return true;
 669
 670         cur.top().pos() = 0;
 671         cur.resetAnchor();
 672         cur.top().pos() = cur.top().lastpos();
 673
 674         return true;
 675 }
 676
 677
 678 bool multipleCellsSelected(Cursor const & cur)
 679 {
 680         if (!cur.selection() || !cur.inMathed())
 681                 return false;
 682
 683         CursorSlice i1 = cur.selBegin();
 684         CursorSlice i2 = cur.selEnd();
 685         if (!i1.inset().asInsetMath())
 686                 return false;
 687
 688         if (i1.idx() == i2.idx())
 689                 return false;
 690
 691         return true;
 692 }
 693
 694
 695 void switchBetweenClasses(DocumentClassConstPtr oldone,
 696                 DocumentClassConstPtr newone, InsetText & in, ErrorList & errorlist)
 697 {
 698         errorlist.clear();
 699
 700         LBUFERR(!in.paragraphs().empty());
 701         if (oldone == newone)
 702                 return;
 703
 704         DocumentClass const & oldtc = *oldone;
 705         DocumentClass const & newtc = *newone;
 706
 707         // layouts
 708         ParIterator it = par_iterator_begin(in);
 709         ParIterator end = par_iterator_end(in);
 710         // for remembering which layouts we've had to add
 711         set<docstring> newlayouts;
 712         for (; it != end; ++it) {
 713                 docstring const name = it->layout().name();
 714
 715                 // the pasted text will keep their own layout name. If this layout does
 716                 // not exist in the new document, it will behave like a standard layout.
 717                 bool const added_one = newtc.addLayoutIfNeeded(name);
 718                 if (added_one)
 719                         newlayouts.insert(name);
 720
 721                 if (added_one || newlayouts.find(name) != newlayouts.end()) {
 722                         // Warn the user.
 723                         docstring const s = bformat(_("Layout `%1$s' was not found."), name);
 724                         errorlist.push_back(
 725                                 ErrorItem(_("Layout Not Found"), s, it->id(), 0, it->size()));
 726                 }
 727
 728                 if (in.usePlainLayout())
 729                         it->setLayout(newtc.plainLayout());
 730                 else
 731                         it->setLayout(newtc[name]);
 732         }
 733
 734         // character styles
 735         InsetIterator const i_end = inset_iterator_end(in);
 736         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 737                 if (it->lyxCode() != FLEX_CODE)
 738                         // FIXME: Should we verify all InsetCollapsable?
 739                         continue;
 740
 741                 docstring const layoutName = it->layoutName();
 742                 docstring const & n = newone->insetLayout(layoutName).name();
 743                 bool const is_undefined = n.empty() ||
 744                         n == DocumentClass::plainInsetLayout().name();
 745                 if (!is_undefined)
 746                         continue;
 747
 748                 // The flex inset is undefined in newtc
 749                 docstring const oldname = from_utf8(oldtc.name());
 750                 docstring const newname = from_utf8(newtc.name());
 751                 docstring s;
 752                 if (oldname == newname)
 753                         s = bformat(_("Flex inset %1$s is undefined after "
 754                                 "reloading `%2$s' layout."), layoutName, oldname);
 755                 else
 756                         s = bformat(_("Flex inset %1$s is undefined because of "
 757                                 "conversion from `%2$s' layout to `%3$s'."),
 758                                 layoutName, oldname, newname);
 759                 // To warn the user that something had to be done.
 760                 errorlist.push_back(ErrorItem(
 761                                 _("Undefined flex inset"),
 762                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 763         }
 764 }
 765
 766
 767 vector<docstring> availableSelections(Buffer const * buf)
 768 {
 769         vector<docstring> selList;
 770         if (!buf)
 771                 return selList;
 772
 773         CutStack::const_iterator cit = theCuts.begin();
 774         CutStack::const_iterator end = theCuts.end();
 775         for (; cit != end; ++cit) {
 776                 // we do not use cit-> here because gcc 2.9x does not
 777                 // like it (JMarc)
 778                 ParagraphList const & pars = (*cit).first;
 779                 docstring asciiSel;
 780                 ParagraphList::const_iterator pit = pars.begin();
 781                 ParagraphList::const_iterator pend = pars.end();
 782                 for (; pit != pend; ++pit) {
 783                         Paragraph par(*pit, 0, 26);
 784                         // adapt paragraph to current buffer.
 785                         par.setBuffer(const_cast<Buffer &>(*buf));
 786                         asciiSel += par.asString(AS_STR_INSETS);
 787                         if (asciiSel.size() > 25) {
 788                                 asciiSel.replace(22, docstring::npos,
 789                                                  from_ascii("..."));
 790                                 break;
 791                         }
 792                 }
 793
 794                 selList.push_back(asciiSel);
 795         }
 796
 797         return selList;
 798 }
 799
 800
 801 size_type numberOfSelections()
 802 {
 803         return theCuts.size();
 804 }
 805
 806
 807 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 808 {
 809         // This doesn't make sense, if there is no selection
 810         if (!cur.selection())
 811                 return;
 812
 813         // OK, we have a selection. This is always between cur.selBegin()
 814         // and cur.selEnd()
 815
 816         if (cur.inTexted()) {
 817                 Text * text = cur.text();
 818                 LBUFERR(text);
 819
 820                 saveSelection(cur);
 821
 822                 // make sure that the depth behind the selection are restored, too
 823                 cur.recordUndoSelection();
 824                 pit_type begpit = cur.selBegin().pit();
 825                 pit_type endpit = cur.selEnd().pit();
 826
 827                 int endpos = cur.selEnd().pos();
 828
 829                 BufferParams const & bp = cur.buffer()->params();
 830                 if (realcut) {
 831                         copySelectionHelper(*cur.buffer(),
 832                                 *text,
 833                                 begpit, endpit,
 834                                 cur.selBegin().pos(), endpos,
 835                                 bp.documentClassPtr(), theCuts);
 836                         // Stuff what we got on the clipboard.
 837                         // Even if there is no selection.
 838                         putClipboard(theCuts[0].first, theCuts[0].second,
 839                                 cur.selectionAsString(true));
 840                 }
 841
 842                 if (begpit != endpit)
 843                         cur.screenUpdateFlags(Update::Force | Update::FitCursor);
 844
 845                 boost::tie(endpit, endpos) =
 846                         eraseSelectionHelper(bp,
 847                                 text->paragraphs(),
 848                                 begpit, endpit,
 849                                 cur.selBegin().pos(), endpos);
 850
 851                 // cutSelection can invalidate the cursor so we need to set
 852                 // it anew. (Lgb)
 853                 // we prefer the end for when tracking changes
 854                 cur.pos() = endpos;
 855                 cur.pit() = endpit;
 856
 857                 // sometimes necessary
 858                 if (doclear
 859                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 860                         cur.fixIfBroken();
 861
 862                 // need a valid cursor. (Lgb)
 863                 cur.clearSelection();
 864
 865                 // After a cut operation, we must make sure that the Buffer is updated
 866                 // because some further operation might need updated label information for
 867                 // example. So we cannot just use "cur.forceBufferUpdate()" here.
 868                 // This fixes #7071.
 869                 cur.buffer()->updateBuffer();
 870
 871                 // tell tabular that a recent copy happened
 872                 dirtyTabularStack(false);
 873         }
 874
 875         if (cur.inMathed()) {
 876                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 877                         // The current selection spans more than one cell.
 878                         // Record all cells
 879                         cur.recordUndoInset();
 880                 } else {
 881                         // Record only the current cell to avoid a jumping
 882                         // cursor after undo
 883                         cur.recordUndo();
 884                 }
 885                 if (realcut)
 886                         copySelection(cur);
 887                 eraseSelection(cur);
 888         }
 889 }
 890
 891
 892 void copySelection(Cursor const & cur)
 893 {
 894         copySelection(cur, cur.selectionAsString(true));
 895 }
 896
 897
 898 void copyInset(Cursor const & cur, Inset * inset, docstring const & plaintext)
 899 {
 900         ParagraphList pars;
 901         Paragraph par;
 902         BufferParams const & bp = cur.buffer()->params();
 903         par.setLayout(bp.documentClass().plainLayout());
 904         par.insertInset(0, inset, Change(Change::UNCHANGED));
 905         pars.push_back(par);
 906         theCuts.push(make_pair(pars, bp.documentClassPtr()));
 907
 908         // stuff the selection onto the X clipboard, from an explicit copy request
 909         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 910 }
 911
 912
 913 namespace {
 914
 915 void copySelectionToStack(Cursor const & cur, CutStack & cutstack)
 916 {
 917         // this doesn't make sense, if there is no selection
 918         if (!cur.selection())
 919                 return;
 920
 921         // copySelection can not yet handle the case of cross idx selection
 922         if (cur.selBegin().idx() != cur.selEnd().idx())
 923                 return;
 924
 925         if (cur.inTexted()) {
 926                 Text * text = cur.text();
 927                 LBUFERR(text);
 928                 // ok we have a selection. This is always between cur.selBegin()
 929                 // and sel_end cursor
 930
 931                 // copy behind a space if there is one
 932                 ParagraphList & pars = text->paragraphs();
 933                 pos_type pos = cur.selBegin().pos();
 934                 pit_type par = cur.selBegin().pit();
 935                 while (pos < pars[par].size() &&
 936                        pars[par].isLineSeparator(pos) &&
 937                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 938                         ++pos;
 939
 940                 copySelectionHelper(*cur.buffer(), *text, par, cur.selEnd().pit(),
 941                         pos, cur.selEnd().pos(),
 942                         cur.buffer()->params().documentClassPtr(), cutstack);
 943
 944                 // Reset the dirty_tabular_stack_ flag only when something
 945                 // is copied to the clipboard (not to the selectionBuffer).
 946                 if (&cutstack == &theCuts)
 947                         dirtyTabularStack(false);
 948         }
 949
 950         if (cur.inMathed()) {
 951                 //lyxerr << "copySelection in mathed" << endl;
 952                 ParagraphList pars;
 953                 Paragraph par;
 954                 BufferParams const & bp = cur.buffer()->params();
 955                 // FIXME This should be the plain layout...right?
 956                 par.setLayout(bp.documentClass().plainLayout());
 957                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 958                 pars.push_back(par);
 959                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 960         }
 961 }
 962
 963 }
 964
 965
 966 void copySelectionToStack()
 967 {
 968         if (!selectionBuffer.empty())
 969                 theCuts.push(selectionBuffer[0]);
 970 }
 971
 972
 973 void copySelection(Cursor const & cur, docstring const & plaintext)
 974 {
 975         // In tablemode, because copy and paste actually use special table stack
 976         // we do not attempt to get selected paragraphs under cursor. Instead, a
 977         // paragraph with the plain text version is generated so that table cells
 978         // can be pasted as pure text somewhere else.
 979         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 980                 ParagraphList pars;
 981                 Paragraph par;
 982                 BufferParams const & bp = cur.buffer()->params();
 983                 par.setLayout(bp.documentClass().plainLayout());
 984                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 985                 pars.push_back(par);
 986                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
 987         } else {
 988                 copySelectionToStack(cur, theCuts);
 989         }
 990
 991         // stuff the selection onto the X clipboard, from an explicit copy request
 992         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 993 }
 994
 995
 996 void saveSelection(Cursor const & cur)
 997 {
 998         // This function is called, not when a selection is formed, but when
 999         // a selection is cleared. Therefore, multiple keyboard selection
1000         // will not repeatively trigger this function (bug 3877).
1001         if (cur.selection()
1002             && cur.selBegin() == cur.bv().cursor().selBegin()
1003             && cur.selEnd() == cur.bv().cursor().selEnd()) {
1004                 LYXERR(Debug::SELECTION, "saveSelection: '" << cur.selectionAsString(true) << "'");
1005                 copySelectionToStack(cur, selectionBuffer);
1006         }
1007 }
1008
1009
1010 bool selection()
1011 {
1012         return !selectionBuffer.empty();
1013 }
1014
1015
1016 void clearSelection()
1017 {
1018         selectionBuffer.clear();
1019 }
1020
1021
1022 void clearCutStack()
1023 {
1024         theCuts.clear();
1025 }
1026
1027
1028 docstring selection(size_t sel_index)
1029 {
1030         return sel_index < theCuts.size()
1031                 ? theCuts[sel_index].first.back().asString(AS_STR_INSETS | AS_STR_NEWLINES)
1032                 : docstring();
1033 }
1034
1035
1036 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
1037                         DocumentClassConstPtr docclass, ErrorList & errorList)
1038 {
1039         if (cur.inTexted()) {
1040                 Text * text = cur.text();
1041                 LBUFERR(text);
1042
1043                 PasteReturnValue prv =
1044                         pasteSelectionHelper(cur, parlist, docclass, 0, errorList);
1045                 cur.forceBufferUpdate();
1046                 cur.clearSelection();
1047                 text->setCursor(cur, prv.par, prv.pos);
1048         }
1049
1050         // mathed is handled in InsetMathNest/InsetMathGrid
1051         LATTEST(!cur.inMathed());
1052 }
1053
1054
1055 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
1056 {
1057         // this does not make sense, if there is nothing to paste
1058         if (!checkPastePossible(sel_index))
1059                 return;
1060
1061         cur.recordUndo();
1062         pasteParagraphList(cur, theCuts[sel_index].first,
1063                            theCuts[sel_index].second, errorList);
1064 }
1065
1066
1067 void pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs,
1068                         Clipboard::TextType type)
1069 {
1070         // Use internal clipboard if it is the most recent one
1071         // This overrides asParagraphs and type on purpose!
1072         if (theClipboard().isInternal()) {
1073                 pasteFromStack(cur, errorList, 0);
1074                 return;
1075         }
1076
1077         // First try LyX format
1078         if ((type == Clipboard::LyXTextType ||
1079              type == Clipboard::LyXOrPlainTextType ||
1080              type == Clipboard::AnyTextType) &&
1081             theClipboard().hasTextContents(Clipboard::LyXTextType)) {
1082                 string lyx = theClipboard().getAsLyX();
1083                 if (!lyx.empty()) {
1084                         // For some strange reason gcc 3.2 and 3.3 do not accept
1085                         // Buffer buffer(string(), false);
1086                         Buffer buffer("", false);
1087                         buffer.setUnnamed(true);
1088                         if (buffer.readString(lyx)) {
1089                                 cur.recordUndo();
1090                                 pasteParagraphList(cur, buffer.paragraphs(),
1091                                         buffer.params().documentClassPtr(), errorList);
1092                                 return;
1093                         }
1094                 }
1095         }
1096
1097         // Then try TeX and HTML
1098         Clipboard::TextType types[2] = {Clipboard::HtmlTextType, Clipboard::LaTeXTextType};
1099         string names[2] = {"html", "latex"};
1100         for (int i = 0; i < 2; ++i) {
1101                 if (type != types[i] && type != Clipboard::AnyTextType)
1102                         continue;
1103                 bool available = theClipboard().hasTextContents(types[i]);
1104
1105                 // If a specific type was explicitly requested, try to
1106                 // interpret plain text: The user told us that the clipboard
1107                 // contents is in the desired format
1108                 if (!available && type == types[i]) {
1109                         types[i] = Clipboard::PlainTextType;
1110                         available = theClipboard().hasTextContents(types[i]);
1111                 }
1112
1113                 if (available) {
1114                         docstring text = theClipboard().getAsText(types[i]);
1115                         available = !text.empty();
1116                         if (available) {
1117                                 // For some strange reason gcc 3.2 and 3.3 do not accept
1118                                 // Buffer buffer(string(), false);
1119                                 Buffer buffer("", false);
1120                                 buffer.setUnnamed(true);
1121                                 if (buffer.importString(names[i], text, errorList)) {
1122                                         cur.recordUndo();
1123                                         pasteParagraphList(cur, buffer.paragraphs(),
1124                                                 buffer.params().documentClassPtr(), errorList);
1125                                         return;
1126                                 }
1127                         }
1128                 }
1129         }
1130
1131         // Then try plain text
1132         docstring const text = theClipboard().getAsText(Clipboard::PlainTextType);
1133         if (text.empty())
1134                 return;
1135         cur.recordUndo();
1136         if (asParagraphs)
1137                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1138         else
1139                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1140 }
1141
1142
1143 void pasteSimpleText(Cursor & cur, bool asParagraphs)
1144 {
1145         docstring text;
1146         // Use internal clipboard if it is the most recent one
1147         if (theClipboard().isInternal()) {
1148                 if (!checkPastePossible(0))
1149                         return;
1150
1151                 ParagraphList const & pars = theCuts[0].first;
1152                 ParagraphList::const_iterator it = pars.begin();
1153                 for (; it != pars.end(); ++it) {
1154                         if (it != pars.begin())
1155                                 text += "\n";
1156                         text += (*it).asString();
1157                 }
1158                 asParagraphs = false;
1159         } else {
1160                 // Then try plain text
1161                 text = theClipboard().getAsText(Clipboard::PlainTextType);
1162         }
1163
1164         if (text.empty())
1165                 return;
1166
1167         cur.recordUndo();
1168         cutSelection(cur, true, false);
1169         if (asParagraphs)
1170                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1171         else
1172                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1173 }
1174
1175
1176 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
1177                             Clipboard::GraphicsType preferedType)
1178 {
1179         LASSERT(theClipboard().hasGraphicsContents(preferedType), return);
1180
1181         // get picture from clipboard
1182         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
1183         if (filename.empty())
1184                 return;
1185
1186         // create inset for graphic
1187         InsetGraphics * inset = new InsetGraphics(cur.buffer());
1188         InsetGraphicsParams params;
1189         params.filename = support::DocFileName(filename.absFileName(), false);
1190         inset->setParams(params);
1191         cur.recordUndo();
1192         cur.insert(inset);
1193 }
1194
1195
1196 void pasteSelection(Cursor & cur, ErrorList & errorList)
1197 {
1198         if (selectionBuffer.empty())
1199                 return;
1200         cur.recordUndo();
1201         pasteParagraphList(cur, selectionBuffer[0].first,
1202                            selectionBuffer[0].second, errorList);
1203 }
1204
1205
1206 void replaceSelectionWithString(Cursor & cur, docstring const & str)
1207 {
1208         cur.recordUndo();
1209         DocIterator selbeg = cur.selectionBegin();
1210
1211         // Get font setting before we cut, we need a copy here, not a bare reference.
1212         Font const font =
1213                 selbeg.paragraph().getFontSettings(cur.buffer()->params(), selbeg.pos());
1214
1215         // Insert the new string
1216         pos_type pos = cur.selEnd().pos();
1217         Paragraph & par = cur.selEnd().paragraph();
1218         docstring::const_iterator cit = str.begin();
1219         docstring::const_iterator end = str.end();
1220         for (; cit != end; ++cit, ++pos)
1221                 par.insertChar(pos, *cit, font, cur.buffer()->params().trackChanges);
1222
1223         // Cut the selection
1224         cutSelection(cur, true, false);
1225 }
1226
1227
1228 void replaceSelection(Cursor & cur)
1229 {
1230         if (cur.selection())
1231                 cutSelection(cur, true, false);
1232 }
1233
1234
1235 void eraseSelection(Cursor & cur)
1236 {
1237         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
1238         CursorSlice const & i1 = cur.selBegin();
1239         CursorSlice const & i2 = cur.selEnd();
1240         if (i1.inset().asInsetMath()) {
1241                 saveSelection(cur);
1242                 cur.top() = i1;
1243                 if (i1.idx() == i2.idx()) {
1244                         i1.cell().erase(i1.pos(), i2.pos());
1245                         // We may have deleted i1.cell(cur.pos()).
1246                         // Make sure that pos is valid.
1247                         if (cur.pos() > cur.lastpos())
1248                                 cur.pos() = cur.lastpos();
1249                 } else {
1250                         InsetMath * p = i1.asInsetMath();
1251                         Inset::row_type r1, r2;
1252                         Inset::col_type c1, c2;
1253                         region(i1, i2, r1, r2, c1, c2);
1254                         for (Inset::row_type row = r1; row <= r2; ++row)
1255                                 for (Inset::col_type col = c1; col <= c2; ++col)
1256                                         p->cell(p->index(row, col)).clear();
1257                         // We've deleted the whole cell. Only pos 0 is valid.
1258                         cur.pos() = 0;
1259                 }
1260                 // need a valid cursor. (Lgb)
1261                 cur.clearSelection();
1262         } else {
1263                 lyxerr << "can't erase this selection 1" << endl;
1264         }
1265         //lyxerr << "cap::eraseSelection end: " << cur << endl;
1266 }
1267
1268
1269 void selDel(Cursor & cur)
1270 {
1271         //lyxerr << "cap::selDel" << endl;
1272         if (cur.selection())
1273                 eraseSelection(cur);
1274 }
1275
1276
1277 void selClearOrDel(Cursor & cur)
1278 {
1279         //lyxerr << "cap::selClearOrDel" << endl;
1280         if (lyxrc.auto_region_delete)
1281                 selDel(cur);
1282         else
1283                 cur.setSelection(false);
1284 }
1285
1286
1287 docstring grabSelection(Cursor const & cur)
1288 {
1289         if (!cur.selection())
1290                 return docstring();
1291
1292 #if 0
1293         // grab selection by glueing multiple cells together. This is not what
1294         // we want because selections spanning multiple cells will get "&" and "\\"
1295         // seperators.
1296         ostringstream os;
1297         for (DocIterator dit = cur.selectionBegin();
1298              dit != cur.selectionEnd(); dit.forwardPos())
1299                 os << asString(dit.cell());
1300         return os.str();
1301 #endif
1302
1303         CursorSlice i1 = cur.selBegin();
1304         CursorSlice i2 = cur.selEnd();
1305
1306         if (i1.idx() == i2.idx()) {
1307                 if (i1.inset().asInsetMath()) {
1308                         MathData::const_iterator it = i1.cell().begin();
1309                         Buffer * buf = cur.buffer();
1310                         return asString(MathData(buf, it + i1.pos(), it + i2.pos()));
1311                 } else {
1312                         return from_ascii("unknown selection 1");
1313                 }
1314         }
1315
1316         Inset::row_type r1, r2;
1317         Inset::col_type c1, c2;
1318         region(i1, i2, r1, r2, c1, c2);
1319
1320         docstring data;
1321         if (i1.inset().asInsetMath()) {
1322                 for (Inset::row_type row = r1; row <= r2; ++row) {
1323                         if (row > r1)
1324                                 data += "\\\\";
1325                         for (Inset::col_type col = c1; col <= c2; ++col) {
1326                                 if (col > c1)
1327                                         data += '&';
1328                                 data += asString(i1.asInsetMath()->
1329                                         cell(i1.asInsetMath()->index(row, col)));
1330                         }
1331                 }
1332         } else {
1333                 data = from_ascii("unknown selection 2");
1334         }
1335         return data;
1336 }
1337
1338
1339 void dirtyTabularStack(bool b)
1340 {
1341         dirty_tabular_stack_ = b;
1342 }
1343
1344
1345 bool tabularStackDirty()
1346 {
1347         return dirty_tabular_stack_;
1348 }
1349
1350
1351 } // namespace cap
1352 } // namespace lyx