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 #include "support/TempFile.h"
  64
  65 #include "frontends/alert.h"
  66 #include "frontends/Clipboard.h"
  67 #include "frontends/Selection.h"
  68
  69 #include <boost/tuple/tuple.hpp>
  70 #include <boost/next_prior.hpp>
  71
  72 #include <string>
  73
  74 using namespace std;
  75 using namespace lyx::support;
  76 using lyx::frontend::Clipboard;
  77
  78 namespace lyx {
  79
  80 namespace {
  81
  82 typedef pair<pit_type, int> PitPosPair;
  83
  84 typedef limited_stack<pair<ParagraphList, DocumentClassConstPtr> > CutStack;
  85
  86 CutStack theCuts(10);
  87 // persistent selection, cleared until the next selection
  88 CutStack selectionBuffer(1);
  89
  90 // store whether the tabular stack is newer than the normal copy stack
  91 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  92 // when we (hopefully) have a one-for-all paste mechanism.
  93 bool dirty_tabular_stack_ = false;
  94
  95
  96 bool checkPastePossible(int index)
  97 {
  98         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
  99 }
 100
 101
 102 struct PasteReturnValue {
 103         PasteReturnValue(pit_type r_par, pos_type r_pos, bool r_nu) :
 104           par(r_par), pos(r_pos), needupdate(r_nu)
 105         {}
 106
 107         pit_type par;
 108         pos_type pos;
 109         bool needupdate;
 110 };
 111
 112 PasteReturnValue
 113 pasteSelectionHelper(DocIterator const & cur, ParagraphList const & parlist,
 114                      DocumentClassConstPtr oldDocClass, Buffer * tmpbuffer,
 115                      ErrorList & errorlist)
 116 {
 117         Buffer const & buffer = *cur.buffer();
 118         pit_type pit = cur.pit();
 119         pos_type pos = cur.pos();
 120         bool need_update = false;
 121
 122         if (parlist.empty())
 123                 return PasteReturnValue(pit, pos, need_update);
 124
 125         InsetText * target_inset = cur.inset().asInsetText();
 126         if (!target_inset) {
 127                 InsetTabular * it = cur.inset().asInsetTabular();
 128                 target_inset = it ? it->cell(cur.idx())->asInsetText() : 0;
 129         }
 130         LASSERT(target_inset, return PasteReturnValue(pit, pos, need_update));
 131
 132         ParagraphList & pars = target_inset->paragraphs();
 133         LASSERT(pos <= pars[pit].size(),
 134                         return PasteReturnValue(pit, pos, need_update));
 135
 136         // Make a copy of the CaP paragraphs.
 137         ParagraphList insertion = parlist;
 138
 139         // Now remove all out of the pars which is NOT allowed in the
 140         // new environment and set also another font if that is required.
 141
 142         // Convert newline to paragraph break in ParbreakIsNewline
 143         if (target_inset->getLayout().parbreakIsNewline()
 144             || pars[pit].layout().parbreak_is_newline) {
 145                 for (size_t i = 0; i != insertion.size(); ++i) {
 146                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 147                                 if (insertion[i].isNewline(j)) {
 148                                         // do not track deletion of newline
 149                                         insertion[i].eraseChar(j, false);
 150                                         insertion[i].setInsetOwner(target_inset);
 151                                         breakParagraphConservative(
 152                                                         buffer.params(),
 153                                                         insertion, i, j);
 154                                         break;
 155                                 }
 156                         }
 157                 }
 158         }
 159
 160         // set the paragraphs to plain layout if necessary
 161         DocumentClassConstPtr newDocClass = buffer.params().documentClassPtr();
 162         if (cur.inset().usePlainLayout()) {
 163                 bool forcePlainLayout = cur.inset().forcePlainLayout();
 164                 Layout const & plainLayout = newDocClass->plainLayout();
 165                 Layout const & defaultLayout = newDocClass->defaultLayout();
 166                 ParagraphList::iterator const end = insertion.end();
 167                 ParagraphList::iterator par = insertion.begin();
 168                 for (; par != end; ++par) {
 169                         Layout const & parLayout = par->layout();
 170                         if (forcePlainLayout || parLayout == defaultLayout)
 171                                 par->setLayout(plainLayout);
 172                 }
 173         } else {
 174                 // check if we need to reset from plain layout
 175                 Layout const & defaultLayout = newDocClass->defaultLayout();
 176                 Layout const & plainLayout = newDocClass->plainLayout();
 177                 ParagraphList::iterator const end = insertion.end();
 178                 ParagraphList::iterator par = insertion.begin();
 179                 for (; par != end; ++par) {
 180                         Layout const & parLayout = par->layout();
 181                         if (parLayout == plainLayout)
 182                                 par->setLayout(defaultLayout);
 183                 }
 184         }
 185
 186         InsetText in(cur.buffer());
 187         // Make sure there is no class difference.
 188         in.paragraphs().clear();
 189         // This works without copying any paragraph data because we have
 190         // a specialized swap method for ParagraphList. This is important
 191         // since we store pointers to insets at some places and we don't
 192         // want to invalidate them.
 193         insertion.swap(in.paragraphs());
 194         cap::switchBetweenClasses(oldDocClass, newDocClass, in, errorlist);
 195         insertion.swap(in.paragraphs());
 196
 197         ParagraphList::iterator tmpbuf = insertion.begin();
 198         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 199
 200         depth_type max_depth = pars[pit].getMaxDepthAfter();
 201
 202         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 203                 // If we have a negative jump so that the depth would
 204                 // go below 0 depth then we have to redo the delta to
 205                 // this new max depth level so that subsequent
 206                 // paragraphs are aligned correctly to this paragraph
 207                 // at level 0.
 208                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 209                         depth_delta = 0;
 210
 211                 // Set the right depth so that we are not too deep or shallow.
 212                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 213                 if (tmpbuf->params().depth() > max_depth)
 214                         tmpbuf->params().depth(max_depth);
 215
 216                 // Set max_depth for the next paragraph
 217                 max_depth = tmpbuf->getMaxDepthAfter();
 218
 219                 // Set the inset owner of this paragraph.
 220                 tmpbuf->setInsetOwner(target_inset);
 221                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 222                         // do not track deletion of invalid insets
 223                         if (Inset * inset = tmpbuf->getInset(i))
 224                                 if (!target_inset->insetAllowed(inset->lyxCode()))
 225                                         tmpbuf->eraseChar(i--, false);
 226                 }
 227
 228                 tmpbuf->setChange(Change(buffer.params().track_changes ?
 229                                          Change::INSERTED : Change::UNCHANGED));
 230         }
 231
 232         bool const empty = pars[pit].empty();
 233         if (!empty) {
 234                 // Make the buf exactly the same layout as the cursor
 235                 // paragraph.
 236                 insertion.begin()->makeSameLayout(pars[pit]);
 237         }
 238
 239         // Prepare the paragraphs and insets for insertion.
 240         insertion.swap(in.paragraphs());
 241
 242         InsetIterator const i_end = inset_iterator_end(in);
 243         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 244                 // Even though this will also be done later, it has to be done here
 245                 // since some inset might going to try to access
 246                 // the buffer() member.
 247                 it->setBuffer(const_cast<Buffer &>(buffer));
 248                 switch (it->lyxCode()) {
 249
 250                 case MATH_HULL_CODE: {
 251                         // check for equation labels and resolve duplicates
 252                         InsetMathHull * ins = it->asInsetMath()->asHullInset();
 253                         std::vector<InsetLabel *> labels = ins->getLabels();
 254                         for (size_t i = 0; i != labels.size(); ++i) {
 255                                 if (!labels[i])
 256                                         continue;
 257                                 InsetLabel * lab = labels[i];
 258                                 docstring const oldname = lab->getParam("name");
 259                                 lab->updateLabel(oldname);
 260                                 // We need to update the buffer reference cache.
 261                                 need_update = true;
 262                                 docstring const newname = lab->getParam("name");
 263                                 if (oldname == newname)
 264                                         continue;
 265                                 // adapt the references
 266                                 for (InsetIterator itt = inset_iterator_begin(in);
 267                                       itt != i_end; ++itt) {
 268                                         if (itt->lyxCode() == REF_CODE) {
 269                                                 InsetCommand * ref = itt->asInsetCommand();
 270                                                 if (ref->getParam("reference") == oldname)
 271                                                         ref->setParam("reference", newname);
 272                                         } else if (itt->lyxCode() == MATH_REF_CODE) {
 273                                                 InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 274                                                 // this is necessary to prevent an uninitialized
 275                                                 // buffer when the RefInset is in a MathBox.
 276                                                 // FIXME audit setBuffer calls
 277                                                 mi->setBuffer(const_cast<Buffer &>(buffer));
 278                                                 if (mi->getTarget() == oldname)
 279                                                         mi->changeTarget(newname);
 280                                         }
 281                                 }
 282                         }
 283                         break;
 284                 }
 285
 286                 case LABEL_CODE: {
 287                         // check for duplicates
 288                         InsetLabel & lab = static_cast<InsetLabel &>(*it);
 289                         docstring const oldname = lab.getParam("name");
 290                         lab.updateLabel(oldname);
 291                         // We need to update the buffer reference cache.
 292                         need_update = true;
 293                         docstring const newname = lab.getParam("name");
 294                         if (oldname == newname)
 295                                 break;
 296                         // adapt the references
 297                         for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 298                                 if (itt->lyxCode() == REF_CODE) {
 299                                         InsetCommand & ref = static_cast<InsetCommand &>(*itt);
 300                                         if (ref.getParam("reference") == oldname)
 301                                                 ref.setParam("reference", newname);
 302                                 } else if (itt->lyxCode() == MATH_REF_CODE) {
 303                                         InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 304                                         // this is necessary to prevent an uninitialized
 305                                         // buffer when the RefInset is in a MathBox.
 306                                         // FIXME audit setBuffer calls
 307                                         mi->setBuffer(const_cast<Buffer &>(buffer));
 308                                         if (mi->getTarget() == oldname)
 309                                                 mi->changeTarget(newname);
 310                                 }
 311                         }
 312                         break;
 313                 }
 314
 315                 case INCLUDE_CODE: {
 316                         InsetInclude & inc = static_cast<InsetInclude &>(*it);
 317                         inc.updateCommand();
 318                         // We need to update the list of included files.
 319                         need_update = true;
 320                         break;
 321                 }
 322
 323                 case BIBITEM_CODE: {
 324                         // check for duplicates
 325                         InsetBibitem & bib = static_cast<InsetBibitem &>(*it);
 326                         docstring const oldkey = bib.getParam("key");
 327                         bib.updateCommand(oldkey, false);
 328                         // We need to update the buffer reference cache.
 329                         need_update = true;
 330                         docstring const newkey = bib.getParam("key");
 331                         if (oldkey == newkey)
 332                                 break;
 333                         // adapt the references
 334                         for (InsetIterator itt = inset_iterator_begin(in);
 335                              itt != i_end; ++itt) {
 336                                 if (itt->lyxCode() == CITE_CODE) {
 337                                         InsetCommand * ref = itt->asInsetCommand();
 338                                         if (ref->getParam("key") == oldkey)
 339                                                 ref->setParam("key", newkey);
 340                                 }
 341                         }
 342                         break;
 343                 }
 344
 345                 case BRANCH_CODE: {
 346                         // check if branch is known to target buffer
 347                         // or its master
 348                         InsetBranch & br = static_cast<InsetBranch &>(*it);
 349                         docstring const name = br.branch();
 350                         if (name.empty())
 351                                 break;
 352                         bool const is_child = (&buffer != buffer.masterBuffer());
 353                         BranchList branchlist = buffer.params().branchlist();
 354                         if ((!is_child && branchlist.find(name))
 355                             || (is_child && (branchlist.find(name)
 356                                 || buffer.masterBuffer()->params().branchlist().find(name))))
 357                                 break;
 358                         if (tmpbuffer) {
 359                                 // This is for a temporary buffer, so simply create the branch.
 360                                 // Must not use lyx::dispatch(), since tmpbuffer has no view.
 361                                 DispatchResult dr;
 362                                 tmpbuffer->dispatch(FuncRequest(LFUN_BRANCH_ADD, name), dr);
 363                         } else {
 364                                 docstring text = bformat(
 365                                         _("The pasted branch \"%1$s\" is undefined.\n"
 366                                           "Do you want to add it to the document's branch list?"),
 367                                         name);
 368                                 if (frontend::Alert::prompt(_("Unknown branch"),
 369                                           text, 0, 1, _("&Add"), _("&Don't Add")) != 0)
 370                                         break;
 371                                 lyx::dispatch(FuncRequest(LFUN_BRANCH_ADD, name));
 372                         }
 373                         // We need to update the list of branches.
 374                         need_update = true;
 375                         break;
 376                 }
 377
 378                 default:
 379                         break; // nothing
 380                 }
 381         }
 382         insertion.swap(in.paragraphs());
 383
 384         // Split the paragraph for inserting the buf if necessary.
 385         if (!empty)
 386                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 387
 388         // Paste it!
 389         if (empty) {
 390                 pars.insert(boost::next(pars.begin(), pit),
 391                             insertion.begin(),
 392                             insertion.end());
 393
 394                 // merge the empty par with the last par of the insertion
 395                 mergeParagraph(buffer.params(), pars,
 396                                pit + insertion.size() - 1);
 397         } else {
 398                 pars.insert(boost::next(pars.begin(), pit + 1),
 399                             insertion.begin(),
 400                             insertion.end());
 401
 402                 // merge the first par of the insertion with the current par
 403                 mergeParagraph(buffer.params(), pars, pit);
 404         }
 405
 406         // Store the new cursor position.
 407         pit_type last_paste = pit + insertion.size() - 1;
 408         pit_type startpit = pit;
 409         pit = last_paste;
 410         pos = pars[last_paste].size();
 411
 412         // FIXME Should we do it here, or should we let updateBuffer() do it?
 413         // Set paragraph buffers. It's important to do this right away
 414         // before something calls Inset::buffer() and causes a crash.
 415         for (pit_type p = startpit; p <= pit; ++p)
 416                 pars[p].setBuffer(const_cast<Buffer &>(buffer));
 417
 418         // Join (conditionally) last pasted paragraph with next one, i.e.,
 419         // the tail of the spliced document paragraph
 420         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 421                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 422                         mergeParagraph(buffer.params(), pars, last_paste);
 423                 } else if (pars[last_paste + 1].empty()) {
 424                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 425                         mergeParagraph(buffer.params(), pars, last_paste);
 426                 } else if (pars[last_paste].empty()) {
 427                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 428                         mergeParagraph(buffer.params(), pars, last_paste);
 429                 } else {
 430                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().track_changes);
 431                         ++last_paste;
 432                 }
 433         }
 434
 435         return PasteReturnValue(pit, pos, need_update);
 436 }
 437
 438
 439 PitPosPair eraseSelectionHelper(BufferParams const & params,
 440         ParagraphList & pars,
 441         pit_type startpit, pit_type endpit,
 442         int startpos, int endpos)
 443 {
 444         // Start of selection is really invalid.
 445         if (startpit == pit_type(pars.size()) ||
 446             (startpos > pars[startpit].size()))
 447                 return PitPosPair(endpit, endpos);
 448
 449         // Start and end is inside same paragraph
 450         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 451                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.track_changes);
 452                 return PitPosPair(endpit, endpos);
 453         }
 454
 455         for (pit_type pit = startpit; pit != endpit + 1;) {
 456                 pos_type const left  = (pit == startpit ? startpos : 0);
 457                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 458                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.track_changes);
 459
 460                 // Logically erase only, including the end-of-paragraph character
 461                 pars[pit].eraseChars(left, right, params.track_changes);
 462
 463                 // Separate handling of paragraph break:
 464                 if (merge && pit != endpit &&
 465                     (pit + 1 != endpit
 466                      || pars[pit].hasSameLayout(pars[endpit])
 467                      || pars[endpit].size() == endpos)) {
 468                         if (pit + 1 == endpit)
 469                                 endpos += pars[pit].size();
 470                         mergeParagraph(params, pars, pit);
 471                         --endpit;
 472                 } else
 473                         ++pit;
 474         }
 475
 476         // Ensure legal cursor pos:
 477         endpit = startpit;
 478         endpos = startpos;
 479         return PitPosPair(endpit, endpos);
 480 }
 481
 482
 483 void putClipboard(ParagraphList const & paragraphs,
 484         DocumentClassConstPtr docclass, docstring const & plaintext)
 485 {
 486         // This used to need to be static to avoid a memory leak. It no longer needs
 487         // to be so, but the alternative is to construct a new one of these (with a
 488         // new temporary directory, etc) every time, and then to destroy it. So maybe
 489         // it's worth just keeping this one around.
 490         // FIXME THREAD
 491         static TempFile tempfile("clipboard.internal");
 492         tempfile.setAutoRemove(false);
 493         static Buffer * staticbuffer = theBufferList().newInternalBuffer(
 494                         tempfile.name().absFileName());
 495
 496         // These two things only really need doing the first time.
 497         staticbuffer->setUnnamed(true);
 498         staticbuffer->inset().setBuffer(*staticbuffer);
 499
 500         // Use a clone for the complicated stuff so that we do not need to clean
 501         // up in order to avoid a crash.
 502         Buffer * buffer = staticbuffer->cloneBufferOnly();
 503         LASSERT(buffer, return);
 504
 505         // This needs doing every time.
 506         // Since setDocumentClass() causes deletion of the old document class
 507         // we need to reset all layout pointers in paragraphs (otherwise they
 508         // would be dangling).
 509         ParIterator const end = buffer->par_iterator_end();
 510         for (ParIterator it = buffer->par_iterator_begin(); it != end; ++it) {
 511                 docstring const name = it->layout().name();
 512                 if (docclass->hasLayout(name))
 513                         it->setLayout((*docclass)[name]);
 514                 else
 515                         it->setPlainOrDefaultLayout(*docclass);
 516         }
 517         buffer->params().setDocumentClass(docclass);
 518
 519         // we will use pasteSelectionHelper to copy the paragraphs into the
 520         // temporary Buffer, since it does a lot of things to fix them up.
 521         DocIterator dit = doc_iterator_begin(buffer, &buffer->inset());
 522         ErrorList el;
 523         pasteSelectionHelper(dit, paragraphs, docclass, buffer, el);
 524
 525         // We don't want to produce images that are not used. Therefore,
 526         // output formulas as MathML. Even if this is not understood by all
 527         // applications, the number that can parse it should go up in the future.
 528         buffer->params().html_math_output = BufferParams::MathML;
 529
 530         // Make sure MarkAsExporting is deleted before buffer is
 531         {
 532                 // The Buffer is being used to export. This is necessary so that the
 533                 // updateMacros call will record the needed information.
 534                 MarkAsExporting mex(buffer);
 535
 536                 buffer->updateBuffer(Buffer::UpdateMaster, OutputUpdate);
 537                 buffer->updateMacros();
 538                 buffer->updateMacroInstances(OutputUpdate);
 539
 540                 // LyX's own format
 541                 string lyx;
 542                 ostringstream oslyx;
 543                 if (buffer->write(oslyx))
 544                         lyx = oslyx.str();
 545
 546                 // XHTML format
 547                 odocstringstream oshtml;
 548                 OutputParams runparams(encodings.fromLyXName("utf8"));
 549                 // We do not need to produce images, etc.
 550                 runparams.dryrun = true;
 551                 // We are not interested in errors (bug 8866)
 552                 runparams.silent = true;
 553                 buffer->writeLyXHTMLSource(oshtml, runparams, Buffer::FullSource);
 554
 555                 theClipboard().put(lyx, oshtml.str(), plaintext);
 556         }
 557
 558         // Save that memory
 559         delete buffer;
 560 }
 561
 562
 563 /// return true if the whole ParagraphList is deleted
 564 static bool isFullyDeleted(ParagraphList const & pars)
 565 {
 566         pit_type const pars_size = static_cast<pit_type>(pars.size());
 567
 568         // check all paragraphs
 569         for (pit_type pit = 0; pit < pars_size; ++pit) {
 570                 if (!pars[pit].empty())   // prevent assertion failure
 571                         if (!pars[pit].isDeleted(0, pars[pit].size()))
 572                                 return false;
 573         }
 574         return true;
 575 }
 576
 577
 578 void copySelectionHelper(Buffer const & buf, Text const & text,
 579         pit_type startpit, pit_type endpit,
 580         int start, int end, DocumentClassConstPtr dc, CutStack & cutstack)
 581 {
 582         ParagraphList const & pars = text.paragraphs();
 583
 584         // In most of these cases, we can try to recover.
 585         LASSERT(0 <= start, start = 0);
 586         LASSERT(start <= pars[startpit].size(), start = pars[startpit].size());
 587         LASSERT(0 <= end, end = 0);
 588         LASSERT(end <= pars[endpit].size(), end = pars[endpit].size());
 589         LASSERT(startpit != endpit || start <= end, return);
 590
 591         // Clone the paragraphs within the selection.
 592         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 593                                 boost::next(pars.begin(), endpit + 1));
 594
 595         // Remove the end of the last paragraph; afterwards, remove the
 596         // beginning of the first paragraph. Keep this order - there may only
 597         // be one paragraph!  Do not track deletions here; this is an internal
 598         // action not visible to the user
 599
 600         Paragraph & back = copy_pars.back();
 601         back.eraseChars(end, back.size(), false);
 602         Paragraph & front = copy_pars.front();
 603         front.eraseChars(0, start, false);
 604
 605         ParagraphList::iterator it = copy_pars.begin();
 606         ParagraphList::iterator it_end = copy_pars.end();
 607
 608         for (; it != it_end; ++it) {
 609                 // Since we have a copy of the paragraphs, the insets
 610                 // do not have a proper buffer reference. It makes
 611                 // sense to add them temporarily, because the
 612                 // operations below depend on that (acceptChanges included).
 613                 it->setBuffer(const_cast<Buffer &>(buf));
 614                 // PassThru paragraphs have the Language
 615                 // latex_language. This is invalid for others, so we
 616                 // need to change it to the buffer language.
 617                 if (it->isPassThru())
 618                         it->changeLanguage(buf.params(),
 619                                            latex_language, buf.language());
 620         }
 621
 622         // do not copy text (also nested in insets) which is marked as
 623         // deleted, unless the whole selection was deleted
 624         if (!isFullyDeleted(copy_pars))
 625                 acceptChanges(copy_pars, buf.params());
 626         else
 627                 rejectChanges(copy_pars, buf.params());
 628
 629
 630         // do some final cleanup now, to make sure that the paragraphs
 631         // are not linked to something else.
 632         it = copy_pars.begin();
 633         for (; it != it_end; ++it) {
 634                 it->setBuffer(*static_cast<Buffer *>(0));
 635                 it->setInsetOwner(0);
 636         }
 637
 638         cutstack.push(make_pair(copy_pars, dc));
 639 }
 640
 641 } // namespace anon
 642
 643
 644
 645
 646 namespace cap {
 647
 648 void region(CursorSlice const & i1, CursorSlice const & i2,
 649             Inset::row_type & r1, Inset::row_type & r2,
 650             Inset::col_type & c1, Inset::col_type & c2)
 651 {
 652         Inset & p = i1.inset();
 653         c1 = p.col(i1.idx());
 654         c2 = p.col(i2.idx());
 655         if (c1 > c2)
 656                 swap(c1, c2);
 657         r1 = p.row(i1.idx());
 658         r2 = p.row(i2.idx());
 659         if (r1 > r2)
 660                 swap(r1, r2);
 661 }
 662
 663
 664 docstring grabAndEraseSelection(Cursor & cur)
 665 {
 666         if (!cur.selection())
 667                 return docstring();
 668         docstring res = grabSelection(cur);
 669         eraseSelection(cur);
 670         return res;
 671 }
 672
 673
 674 bool reduceSelectionToOneCell(Cursor & cur)
 675 {
 676         if (!cur.selection() || !cur.inMathed())
 677                 return false;
 678
 679         CursorSlice i1 = cur.selBegin();
 680         CursorSlice i2 = cur.selEnd();
 681         if (!i1.inset().asInsetMath())
 682                 return false;
 683
 684         // the easy case: do nothing if only one cell is selected
 685         if (i1.idx() == i2.idx())
 686                 return true;
 687
 688         cur.top().pos() = 0;
 689         cur.resetAnchor();
 690         cur.top().pos() = cur.top().lastpos();
 691
 692         return true;
 693 }
 694
 695
 696 bool multipleCellsSelected(Cursor const & cur)
 697 {
 698         if (!cur.selection() || !cur.inMathed())
 699                 return false;
 700
 701         CursorSlice i1 = cur.selBegin();
 702         CursorSlice i2 = cur.selEnd();
 703         if (!i1.inset().asInsetMath())
 704                 return false;
 705
 706         if (i1.idx() == i2.idx())
 707                 return false;
 708
 709         return true;
 710 }
 711
 712
 713 void switchBetweenClasses(DocumentClassConstPtr oldone,
 714                 DocumentClassConstPtr newone, InsetText & in, ErrorList & errorlist)
 715 {
 716         errorlist.clear();
 717
 718         LBUFERR(!in.paragraphs().empty());
 719         if (oldone == newone)
 720                 return;
 721
 722         DocumentClass const & oldtc = *oldone;
 723         DocumentClass const & newtc = *newone;
 724
 725         // layouts
 726         ParIterator it = par_iterator_begin(in);
 727         ParIterator end = par_iterator_end(in);
 728         // for remembering which layouts we've had to add
 729         set<docstring> newlayouts;
 730         for (; it != end; ++it) {
 731                 docstring const name = it->layout().name();
 732
 733                 // the pasted text will keep their own layout name. If this layout does
 734                 // not exist in the new document, it will behave like a standard layout.
 735                 bool const added_one = newtc.addLayoutIfNeeded(name);
 736                 if (added_one)
 737                         newlayouts.insert(name);
 738
 739                 if (added_one || newlayouts.find(name) != newlayouts.end()) {
 740                         // Warn the user.
 741                         docstring const s = bformat(_("Layout `%1$s' was not found."), name);
 742                         errorlist.push_back(
 743                                 ErrorItem(_("Layout Not Found"), s, it->id(), 0, it->size()));
 744                 }
 745
 746                 if (in.usePlainLayout())
 747                         it->setLayout(newtc.plainLayout());
 748                 else
 749                         it->setLayout(newtc[name]);
 750         }
 751
 752         // character styles and hidden table cells
 753         InsetIterator const i_end = inset_iterator_end(in);
 754         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 755                 InsetCode const code = it->lyxCode();
 756                 if (code == FLEX_CODE) {
 757                         // FIXME: Should we verify all InsetCollapsable?
 758                         docstring const layoutName = it->layoutName();
 759                         docstring const & n = newone->insetLayout(layoutName).name();
 760                         bool const is_undefined = n.empty() ||
 761                                 n == DocumentClass::plainInsetLayout().name();
 762                         if (!is_undefined)
 763                                 continue;
 764
 765                         // The flex inset is undefined in newtc
 766                         docstring const oldname = from_utf8(oldtc.name());
 767                         docstring const newname = from_utf8(newtc.name());
 768                         docstring s;
 769                         if (oldname == newname)
 770                                 s = bformat(_("Flex inset %1$s is undefined after "
 771                                         "reloading `%2$s' layout."), layoutName, oldname);
 772                         else
 773                                 s = bformat(_("Flex inset %1$s is undefined because of "
 774                                         "conversion from `%2$s' layout to `%3$s'."),
 775                                         layoutName, oldname, newname);
 776                         // To warn the user that something had to be done.
 777                         errorlist.push_back(ErrorItem(
 778                                         _("Undefined flex inset"),
 779                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 780                 } else if (code == TABULAR_CODE) {
 781                         // The recursion above does not catch paragraphs in "hidden" cells,
 782                         // i.e., ones that are part of a multirow or multicolum. So we need
 783                         // to handle those separately.
 784                         // This is the cause of bug #9049.
 785                         InsetTabular * table = it->asInsetTabular();
 786                         table->setLayoutForHiddenCells(newtc);
 787                 }
 788         }
 789 }
 790
 791
 792 vector<docstring> availableSelections(Buffer const * buf)
 793 {
 794         vector<docstring> selList;
 795         if (!buf)
 796                 return selList;
 797
 798         CutStack::const_iterator cit = theCuts.begin();
 799         CutStack::const_iterator end = theCuts.end();
 800         for (; cit != end; ++cit) {
 801                 // we do not use cit-> here because gcc 2.9x does not
 802                 // like it (JMarc)
 803                 ParagraphList const & pars = (*cit).first;
 804                 docstring asciiSel;
 805                 ParagraphList::const_iterator pit = pars.begin();
 806                 ParagraphList::const_iterator pend = pars.end();
 807                 for (; pit != pend; ++pit) {
 808                         Paragraph par(*pit, 0, 26);
 809                         // adapt paragraph to current buffer.
 810                         par.setBuffer(const_cast<Buffer &>(*buf));
 811                         asciiSel += par.asString(AS_STR_INSETS);
 812                         if (asciiSel.size() > 25) {
 813                                 asciiSel.replace(22, docstring::npos,
 814                                                  from_ascii("..."));
 815                                 break;
 816                         }
 817                 }
 818
 819                 selList.push_back(asciiSel);
 820         }
 821
 822         return selList;
 823 }
 824
 825
 826 size_type numberOfSelections()
 827 {
 828         return theCuts.size();
 829 }
 830
 831
 832 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 833 {
 834         // This doesn't make sense, if there is no selection
 835         if (!cur.selection())
 836                 return;
 837
 838         // OK, we have a selection. This is always between cur.selBegin()
 839         // and cur.selEnd()
 840
 841         if (cur.inTexted()) {
 842                 Text * text = cur.text();
 843                 LBUFERR(text);
 844
 845                 saveSelection(cur);
 846
 847                 // make sure that the depth behind the selection are restored, too
 848                 cur.recordUndoSelection();
 849                 pit_type begpit = cur.selBegin().pit();
 850                 pit_type endpit = cur.selEnd().pit();
 851
 852                 int endpos = cur.selEnd().pos();
 853
 854                 BufferParams const & bp = cur.buffer()->params();
 855                 if (realcut) {
 856                         copySelectionHelper(*cur.buffer(),
 857                                 *text,
 858                                 begpit, endpit,
 859                                 cur.selBegin().pos(), endpos,
 860                                 bp.documentClassPtr(), theCuts);
 861                         // Stuff what we got on the clipboard.
 862                         // Even if there is no selection.
 863                         putClipboard(theCuts[0].first, theCuts[0].second,
 864                                 cur.selectionAsString(true));
 865                 }
 866
 867                 if (begpit != endpit)
 868                         cur.screenUpdateFlags(Update::Force | Update::FitCursor);
 869
 870                 boost::tie(endpit, endpos) =
 871                         eraseSelectionHelper(bp,
 872                                 text->paragraphs(),
 873                                 begpit, endpit,
 874                                 cur.selBegin().pos(), endpos);
 875
 876                 // cutSelection can invalidate the cursor so we need to set
 877                 // it anew. (Lgb)
 878                 // we prefer the end for when tracking changes
 879                 cur.pos() = endpos;
 880                 cur.pit() = endpit;
 881
 882                 // sometimes necessary
 883                 if (doclear
 884                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.track_changes))
 885                         cur.fixIfBroken();
 886
 887                 // need a valid cursor. (Lgb)
 888                 cur.clearSelection();
 889
 890                 // After a cut operation, we must make sure that the Buffer is updated
 891                 // because some further operation might need updated label information for
 892                 // example. So we cannot just use "cur.forceBufferUpdate()" here.
 893                 // This fixes #7071.
 894                 cur.buffer()->updateBuffer();
 895
 896                 // tell tabular that a recent copy happened
 897                 dirtyTabularStack(false);
 898         }
 899
 900         if (cur.inMathed()) {
 901                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 902                         // The current selection spans more than one cell.
 903                         // Record all cells
 904                         cur.recordUndoInset();
 905                 } else {
 906                         // Record only the current cell to avoid a jumping
 907                         // cursor after undo
 908                         cur.recordUndo();
 909                 }
 910                 if (realcut)
 911                         copySelection(cur);
 912                 eraseSelection(cur);
 913         }
 914 }
 915
 916
 917 void copySelection(Cursor const & cur)
 918 {
 919         copySelection(cur, cur.selectionAsString(true));
 920 }
 921
 922
 923 void copyInset(Cursor const & cur, Inset * inset, docstring const & plaintext)
 924 {
 925         ParagraphList pars;
 926         Paragraph par;
 927         BufferParams const & bp = cur.buffer()->params();
 928         par.setLayout(bp.documentClass().plainLayout());
 929         Font font(inherit_font, bp.language);
 930         par.insertInset(0, inset, font, Change(Change::UNCHANGED));
 931         pars.push_back(par);
 932         theCuts.push(make_pair(pars, bp.documentClassPtr()));
 933
 934         // stuff the selection onto the X clipboard, from an explicit copy request
 935         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 936 }
 937
 938
 939 namespace {
 940
 941 void copySelectionToStack(Cursor const & cur, CutStack & cutstack)
 942 {
 943         // this doesn't make sense, if there is no selection
 944         if (!cur.selection())
 945                 return;
 946
 947         // copySelection can not yet handle the case of cross idx selection
 948         if (cur.selBegin().idx() != cur.selEnd().idx())
 949                 return;
 950
 951         if (cur.inTexted()) {
 952                 Text * text = cur.text();
 953                 LBUFERR(text);
 954                 // ok we have a selection. This is always between cur.selBegin()
 955                 // and sel_end cursor
 956
 957                 // copy behind a space if there is one
 958                 ParagraphList & pars = text->paragraphs();
 959                 pos_type pos = cur.selBegin().pos();
 960                 pit_type par = cur.selBegin().pit();
 961                 while (pos < pars[par].size() &&
 962                        pars[par].isLineSeparator(pos) &&
 963                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 964                         ++pos;
 965
 966                 copySelectionHelper(*cur.buffer(), *text, par, cur.selEnd().pit(),
 967                         pos, cur.selEnd().pos(),
 968                         cur.buffer()->params().documentClassPtr(), cutstack);
 969
 970                 // Reset the dirty_tabular_stack_ flag only when something
 971                 // is copied to the clipboard (not to the selectionBuffer).
 972                 if (&cutstack == &theCuts)
 973                         dirtyTabularStack(false);
 974         }
 975
 976         if (cur.inMathed()) {
 977                 //lyxerr << "copySelection in mathed" << endl;
 978                 ParagraphList pars;
 979                 Paragraph par;
 980                 BufferParams const & bp = cur.buffer()->params();
 981                 // FIXME This should be the plain layout...right?
 982                 par.setLayout(bp.documentClass().plainLayout());
 983                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 984                 pars.push_back(par);
 985                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 986         }
 987 }
 988
 989 }
 990
 991
 992 void copySelectionToStack()
 993 {
 994         if (!selectionBuffer.empty())
 995                 theCuts.push(selectionBuffer[0]);
 996 }
 997
 998
 999 void copySelection(Cursor const & cur, docstring const & plaintext)
1000 {
1001         // In tablemode, because copy and paste actually use special table stack
1002         // we do not attempt to get selected paragraphs under cursor. Instead, a
1003         // paragraph with the plain text version is generated so that table cells
1004         // can be pasted as pure text somewhere else.
1005         if (cur.selBegin().idx() != cur.selEnd().idx()) {
1006                 ParagraphList pars;
1007                 Paragraph par;
1008                 BufferParams const & bp = cur.buffer()->params();
1009                 par.setLayout(bp.documentClass().plainLayout());
1010                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
1011                 pars.push_back(par);
1012                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
1013         } else {
1014                 copySelectionToStack(cur, theCuts);
1015         }
1016
1017         // stuff the selection onto the X clipboard, from an explicit copy request
1018         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
1019 }
1020
1021
1022 void saveSelection(Cursor const & cur)
1023 {
1024         // This function is called, not when a selection is formed, but when
1025         // a selection is cleared. Therefore, multiple keyboard selection
1026         // will not repeatively trigger this function (bug 3877).
1027         if (cur.selection()
1028             && cur.selBegin() == cur.bv().cursor().selBegin()
1029             && cur.selEnd() == cur.bv().cursor().selEnd()) {
1030                 LYXERR(Debug::SELECTION, "saveSelection: '" << cur.selectionAsString(true) << "'");
1031                 copySelectionToStack(cur, selectionBuffer);
1032         }
1033 }
1034
1035
1036 bool selection()
1037 {
1038         return !selectionBuffer.empty();
1039 }
1040
1041
1042 void clearSelection()
1043 {
1044         selectionBuffer.clear();
1045 }
1046
1047
1048 void clearCutStack()
1049 {
1050         theCuts.clear();
1051 }
1052
1053
1054 docstring selection(size_t sel_index)
1055 {
1056         return sel_index < theCuts.size()
1057                 ? theCuts[sel_index].first.back().asString(AS_STR_INSETS | AS_STR_NEWLINES)
1058                 : docstring();
1059 }
1060
1061
1062 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
1063                         DocumentClassConstPtr docclass, ErrorList & errorList)
1064 {
1065         if (cur.inTexted()) {
1066                 Text * text = cur.text();
1067                 LBUFERR(text);
1068
1069                 PasteReturnValue prv =
1070                         pasteSelectionHelper(cur, parlist, docclass, 0, errorList);
1071                 cur.forceBufferUpdate();
1072                 cur.clearSelection();
1073                 text->setCursor(cur, prv.par, prv.pos);
1074         }
1075
1076         // mathed is handled in InsetMathNest/InsetMathGrid
1077         LATTEST(!cur.inMathed());
1078 }
1079
1080
1081 bool pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
1082 {
1083         // this does not make sense, if there is nothing to paste
1084         if (!checkPastePossible(sel_index))
1085                 return false;
1086
1087         cur.recordUndo();
1088         pasteParagraphList(cur, theCuts[sel_index].first,
1089                            theCuts[sel_index].second, errorList);
1090         return true;
1091 }
1092
1093
1094 bool pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs,
1095                         Clipboard::TextType type)
1096 {
1097         // Use internal clipboard if it is the most recent one
1098         // This overrides asParagraphs and type on purpose!
1099         if (theClipboard().isInternal())
1100                 return pasteFromStack(cur, errorList, 0);
1101
1102         // First try LyX format
1103         if ((type == Clipboard::LyXTextType ||
1104              type == Clipboard::LyXOrPlainTextType ||
1105              type == Clipboard::AnyTextType) &&
1106             theClipboard().hasTextContents(Clipboard::LyXTextType)) {
1107                 string lyx = theClipboard().getAsLyX();
1108                 if (!lyx.empty()) {
1109                         // For some strange reason gcc 3.2 and 3.3 do not accept
1110                         // Buffer buffer(string(), false);
1111                         Buffer buffer("", false);
1112                         buffer.setUnnamed(true);
1113                         if (buffer.readString(lyx)) {
1114                                 cur.recordUndo();
1115                                 pasteParagraphList(cur, buffer.paragraphs(),
1116                                         buffer.params().documentClassPtr(), errorList);
1117                                 return true;
1118                         }
1119                 }
1120         }
1121
1122         // Then try TeX and HTML
1123         Clipboard::TextType types[2] = {Clipboard::HtmlTextType, Clipboard::LaTeXTextType};
1124         string names[2] = {"html", "latexclipboard"};
1125         for (int i = 0; i < 2; ++i) {
1126                 if (type != types[i] && type != Clipboard::AnyTextType)
1127                         continue;
1128                 bool available = theClipboard().hasTextContents(types[i]);
1129
1130                 // If a specific type was explicitly requested, try to
1131                 // interpret plain text: The user told us that the clipboard
1132                 // contents is in the desired format
1133                 if (!available && type == types[i]) {
1134                         types[i] = Clipboard::PlainTextType;
1135                         available = theClipboard().hasTextContents(types[i]);
1136                 }
1137
1138                 if (available) {
1139                         docstring text = theClipboard().getAsText(types[i]);
1140                         available = !text.empty();
1141                         if (available) {
1142                                 // For some strange reason gcc 3.2 and 3.3 do not accept
1143                                 // Buffer buffer(string(), false);
1144                                 Buffer buffer("", false);
1145                                 buffer.setUnnamed(true);
1146                                 available = buffer.importString(names[i], text, errorList);
1147                                 if (available)
1148                                         available = !buffer.paragraphs().empty();
1149                                 if (available && !buffer.paragraphs()[0].empty()) {
1150                                         cur.recordUndo();
1151                                         pasteParagraphList(cur, buffer.paragraphs(),
1152                                                 buffer.params().documentClassPtr(), errorList);
1153                                         return true;
1154                                 }
1155                         }
1156                 }
1157         }
1158
1159         // Then try plain text
1160         docstring const text = theClipboard().getAsText(Clipboard::PlainTextType);
1161         if (text.empty())
1162                 return false;
1163         cur.recordUndo();
1164         if (asParagraphs)
1165                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1166         else
1167                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1168         return true;
1169 }
1170
1171
1172 void pasteSimpleText(Cursor & cur, bool asParagraphs)
1173 {
1174         docstring text;
1175         // Use internal clipboard if it is the most recent one
1176         if (theClipboard().isInternal()) {
1177                 if (!checkPastePossible(0))
1178                         return;
1179
1180                 ParagraphList const & pars = theCuts[0].first;
1181                 ParagraphList::const_iterator it = pars.begin();
1182                 for (; it != pars.end(); ++it) {
1183                         if (it != pars.begin())
1184                                 text += "\n";
1185                         text += (*it).asString();
1186                 }
1187                 asParagraphs = false;
1188         } else {
1189                 // Then try plain text
1190                 text = theClipboard().getAsText(Clipboard::PlainTextType);
1191         }
1192
1193         if (text.empty())
1194                 return;
1195
1196         cur.recordUndo();
1197         cutSelection(cur, true, false);
1198         if (asParagraphs)
1199                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1200         else
1201                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1202 }
1203
1204
1205 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
1206                             Clipboard::GraphicsType preferedType)
1207 {
1208         LASSERT(theClipboard().hasGraphicsContents(preferedType), return);
1209
1210         // get picture from clipboard
1211         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
1212         if (filename.empty())
1213                 return;
1214
1215         // create inset for graphic
1216         InsetGraphics * inset = new InsetGraphics(cur.buffer());
1217         InsetGraphicsParams params;
1218         params.filename = support::DocFileName(filename.absFileName(), false);
1219         inset->setParams(params);
1220         cur.recordUndo();
1221         cur.insert(inset);
1222 }
1223
1224
1225 void pasteSelection(Cursor & cur, ErrorList & errorList)
1226 {
1227         if (selectionBuffer.empty())
1228                 return;
1229         cur.recordUndo();
1230         pasteParagraphList(cur, selectionBuffer[0].first,
1231                            selectionBuffer[0].second, errorList);
1232 }
1233
1234
1235 void replaceSelectionWithString(Cursor & cur, docstring const & str)
1236 {
1237         cur.recordUndo();
1238         DocIterator selbeg = cur.selectionBegin();
1239
1240         // Get font setting before we cut, we need a copy here, not a bare reference.
1241         Font const font =
1242                 selbeg.paragraph().getFontSettings(cur.buffer()->params(), selbeg.pos());
1243
1244         // Insert the new string
1245         pos_type pos = cur.selEnd().pos();
1246         Paragraph & par = cur.selEnd().paragraph();
1247         docstring::const_iterator cit = str.begin();
1248         docstring::const_iterator end = str.end();
1249         for (; cit != end; ++cit, ++pos)
1250                 par.insertChar(pos, *cit, font, cur.buffer()->params().track_changes);
1251
1252         // Cut the selection
1253         cutSelection(cur, true, false);
1254 }
1255
1256
1257 void replaceSelection(Cursor & cur)
1258 {
1259         if (cur.selection())
1260                 cutSelection(cur, true, false);
1261 }
1262
1263
1264 void eraseSelection(Cursor & cur)
1265 {
1266         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
1267         CursorSlice const & i1 = cur.selBegin();
1268         CursorSlice const & i2 = cur.selEnd();
1269         if (!i1.asInsetMath()) {
1270                 LYXERR0("Can't erase this selection");
1271                 return;
1272         }
1273
1274         saveSelection(cur);
1275         cur.top() = i1;
1276         InsetMath * p = i1.asInsetMath();
1277         if (i1.idx() == i2.idx()) {
1278                 i1.cell().erase(i1.pos(), i2.pos());
1279                 // We may have deleted i1.cell(cur.pos()).
1280                 // Make sure that pos is valid.
1281                 if (cur.pos() > cur.lastpos())
1282                         cur.pos() = cur.lastpos();
1283         } else if (p->nrows() > 0 && p->ncols() > 0) {
1284                 // This is a grid, delete a nice square region
1285                 Inset::row_type r1, r2;
1286                 Inset::col_type c1, c2;
1287                 region(i1, i2, r1, r2, c1, c2);
1288                 for (Inset::row_type row = r1; row <= r2; ++row)
1289                         for (Inset::col_type col = c1; col <= c2; ++col)
1290                                 p->cell(p->index(row, col)).clear();
1291                 // We've deleted the whole cell. Only pos 0 is valid.
1292                 cur.pos() = 0;
1293         } else {
1294                 Inset::idx_type idx1 = i1.idx();
1295                 Inset::idx_type idx2 = i2.idx();
1296                 if (idx1 > idx2)
1297                         swap(idx1, idx2);
1298                 for (Inset::idx_type idx = idx1 ; idx <= idx2; ++idx)
1299                         p->cell(idx).clear();
1300                 // We've deleted the whole cell. Only pos 0 is valid.
1301                 cur.pos() = 0;
1302         }
1303
1304         // need a valid cursor. (Lgb)
1305         cur.clearSelection();
1306         //lyxerr << "cap::eraseSelection end: " << cur << endl;
1307 }
1308
1309
1310 void selDel(Cursor & cur)
1311 {
1312         //lyxerr << "cap::selDel" << endl;
1313         if (cur.selection())
1314                 eraseSelection(cur);
1315 }
1316
1317
1318 void selClearOrDel(Cursor & cur)
1319 {
1320         //lyxerr << "cap::selClearOrDel" << endl;
1321         if (lyxrc.auto_region_delete)
1322                 selDel(cur);
1323         else
1324                 cur.setSelection(false);
1325 }
1326
1327
1328 docstring grabSelection(Cursor const & cur)
1329 {
1330         if (!cur.selection())
1331                 return docstring();
1332
1333 #if 0
1334         // grab selection by glueing multiple cells together. This is not what
1335         // we want because selections spanning multiple cells will get "&" and "\\"
1336         // seperators.
1337         ostringstream os;
1338         for (DocIterator dit = cur.selectionBegin();
1339              dit != cur.selectionEnd(); dit.forwardPos())
1340                 os << asString(dit.cell());
1341         return os.str();
1342 #endif
1343
1344         CursorSlice i1 = cur.selBegin();
1345         CursorSlice i2 = cur.selEnd();
1346
1347         if (i1.idx() == i2.idx()) {
1348                 if (i1.inset().asInsetMath()) {
1349                         MathData::const_iterator it = i1.cell().begin();
1350                         Buffer * buf = cur.buffer();
1351                         return asString(MathData(buf, it + i1.pos(), it + i2.pos()));
1352                 } else {
1353                         return from_ascii("unknown selection 1");
1354                 }
1355         }
1356
1357         Inset::row_type r1, r2;
1358         Inset::col_type c1, c2;
1359         region(i1, i2, r1, r2, c1, c2);
1360
1361         docstring data;
1362         if (i1.inset().asInsetMath()) {
1363                 for (Inset::row_type row = r1; row <= r2; ++row) {
1364                         if (row > r1)
1365                                 data += "\\\\";
1366                         for (Inset::col_type col = c1; col <= c2; ++col) {
1367                                 if (col > c1)
1368                                         data += '&';
1369                                 data += asString(i1.asInsetMath()->
1370                                         cell(i1.asInsetMath()->index(row, col)));
1371                         }
1372                 }
1373         } else {
1374                 data = from_ascii("unknown selection 2");
1375         }
1376         return data;
1377 }
1378
1379
1380 void dirtyTabularStack(bool b)
1381 {
1382         dirty_tabular_stack_ = b;
1383 }
1384
1385
1386 bool tabularStackDirty()
1387 {
1388         return dirty_tabular_stack_;
1389 }
1390
1391
1392 } // namespace cap
1393 } // namespace lyx