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/lyxalgo.h"
  64 #include "support/TempFile.h"
  65
  66 #include "frontends/alert.h"
  67 #include "frontends/Clipboard.h"
  68 #include "frontends/Selection.h"
  69
  70 #include <boost/tuple/tuple.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(lyx::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(lyx::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 Buffer * copyToTempBuffer(ParagraphList const & paragraphs, DocumentClassConstPtr docclass)
 484 {
 485         // This used to need to be static to avoid a memory leak. It no longer needs
 486         // to be so, but the alternative is to construct a new one of these (with a
 487         // new temporary directory, etc) every time, and then to destroy it. So maybe
 488         // it's worth just keeping this one around.
 489         // FIXME THREAD
 490         static TempFile tempfile("clipboard.internal");
 491         tempfile.setAutoRemove(false);
 492         static Buffer * staticbuffer = theBufferList().newInternalBuffer(
 493                         tempfile.name().absFileName());
 494
 495         // These two things only really need doing the first time.
 496         staticbuffer->setUnnamed(true);
 497         staticbuffer->inset().setBuffer(*staticbuffer);
 498
 499         // Use a clone for the complicated stuff so that we do not need to clean
 500         // up in order to avoid a crash.
 501         Buffer * buffer = staticbuffer->cloneBufferOnly();
 502         LASSERT(buffer, return 0);
 503
 504         // This needs doing every time.
 505         // Since setDocumentClass() causes deletion of the old document class
 506         // we need to reset all layout pointers in paragraphs (otherwise they
 507         // would be dangling).
 508         ParIterator const end = buffer->par_iterator_end();
 509         for (ParIterator it = buffer->par_iterator_begin(); it != end; ++it) {
 510                 docstring const name = it->layout().name();
 511                 if (docclass->hasLayout(name))
 512                         it->setLayout((*docclass)[name]);
 513                 else
 514                         it->setPlainOrDefaultLayout(*docclass);
 515         }
 516         buffer->params().setDocumentClass(docclass);
 517
 518         // we will use pasteSelectionHelper to copy the paragraphs into the
 519         // temporary Buffer, since it does a lot of things to fix them up.
 520         DocIterator dit = doc_iterator_begin(buffer, &buffer->inset());
 521         ErrorList el;
 522         pasteSelectionHelper(dit, paragraphs, docclass, buffer, el);
 523
 524         return buffer;
 525 }
 526
 527
 528 void putClipboard(ParagraphList const & paragraphs,
 529         DocumentClassConstPtr docclass, docstring const & plaintext)
 530 {
 531         Buffer * buffer = copyToTempBuffer(paragraphs, docclass);
 532         if (!buffer) // already asserted in copyToTempBuffer()
 533                 return;
 534
 535         // We don't want to produce images that are not used. Therefore,
 536         // output formulas as MathML. Even if this is not understood by all
 537         // applications, the number that can parse it should go up in the future.
 538         buffer->params().html_math_output = BufferParams::MathML;
 539
 540         // Make sure MarkAsExporting is deleted before buffer is
 541         {
 542                 // The Buffer is being used to export. This is necessary so that the
 543                 // updateMacros call will record the needed information.
 544                 MarkAsExporting mex(buffer);
 545
 546                 buffer->updateBuffer(Buffer::UpdateMaster, OutputUpdate);
 547                 buffer->updateMacros();
 548                 buffer->updateMacroInstances(OutputUpdate);
 549
 550                 // LyX's own format
 551                 string lyx;
 552                 ostringstream oslyx;
 553                 if (buffer->write(oslyx))
 554                         lyx = oslyx.str();
 555
 556                 // XHTML format
 557                 odocstringstream oshtml;
 558                 OutputParams runparams(encodings.fromLyXName("utf8"));
 559                 // We do not need to produce images, etc.
 560                 runparams.dryrun = true;
 561                 // We are not interested in errors (bug 8866)
 562                 runparams.silent = true;
 563                 buffer->writeLyXHTMLSource(oshtml, runparams, Buffer::FullSource);
 564
 565                 theClipboard().put(lyx, oshtml.str(), plaintext);
 566         }
 567
 568         // Save that memory
 569         delete buffer;
 570 }
 571
 572
 573 /// return true if the whole ParagraphList is deleted
 574 static bool isFullyDeleted(ParagraphList const & pars)
 575 {
 576         pit_type const pars_size = static_cast<pit_type>(pars.size());
 577
 578         // check all paragraphs
 579         for (pit_type pit = 0; pit < pars_size; ++pit) {
 580                 if (!pars[pit].empty())   // prevent assertion failure
 581                         if (!pars[pit].isDeleted(0, pars[pit].size()))
 582                                 return false;
 583         }
 584         return true;
 585 }
 586
 587
 588 void copySelectionHelper(Buffer const & buf, Text const & text,
 589         pit_type startpit, pit_type endpit,
 590         int start, int end, DocumentClassConstPtr dc, CutStack & cutstack)
 591 {
 592         ParagraphList const & pars = text.paragraphs();
 593
 594         // In most of these cases, we can try to recover.
 595         LASSERT(0 <= start, start = 0);
 596         LASSERT(start <= pars[startpit].size(), start = pars[startpit].size());
 597         LASSERT(0 <= end, end = 0);
 598         LASSERT(end <= pars[endpit].size(), end = pars[endpit].size());
 599         LASSERT(startpit != endpit || start <= end, return);
 600
 601         // Clone the paragraphs within the selection.
 602         ParagraphList copy_pars(lyx::next(pars.begin(), startpit),
 603                                 lyx::next(pars.begin(), endpit + 1));
 604
 605         // Remove the end of the last paragraph; afterwards, remove the
 606         // beginning of the first paragraph. Keep this order - there may only
 607         // be one paragraph!  Do not track deletions here; this is an internal
 608         // action not visible to the user
 609
 610         Paragraph & back = copy_pars.back();
 611         back.eraseChars(end, back.size(), false);
 612         Paragraph & front = copy_pars.front();
 613         front.eraseChars(0, start, false);
 614
 615         ParagraphList::iterator it = copy_pars.begin();
 616         ParagraphList::iterator it_end = copy_pars.end();
 617
 618         for (; it != it_end; ++it) {
 619                 // Since we have a copy of the paragraphs, the insets
 620                 // do not have a proper buffer reference. It makes
 621                 // sense to add them temporarily, because the
 622                 // operations below depend on that (acceptChanges included).
 623                 it->setBuffer(const_cast<Buffer &>(buf));
 624                 // PassThru paragraphs have the Language
 625                 // latex_language. This is invalid for others, so we
 626                 // need to change it to the buffer language.
 627                 if (it->isPassThru())
 628                         it->changeLanguage(buf.params(),
 629                                            latex_language, buf.language());
 630         }
 631
 632         // do not copy text (also nested in insets) which is marked as
 633         // deleted, unless the whole selection was deleted
 634         if (!isFullyDeleted(copy_pars))
 635                 acceptChanges(copy_pars, buf.params());
 636         else
 637                 rejectChanges(copy_pars, buf.params());
 638
 639
 640         // do some final cleanup now, to make sure that the paragraphs
 641         // are not linked to something else.
 642         it = copy_pars.begin();
 643         for (; it != it_end; ++it) {
 644                 it->setBuffer(*static_cast<Buffer *>(0));
 645                 it->setInsetOwner(0);
 646         }
 647
 648         cutstack.push(make_pair(copy_pars, dc));
 649 }
 650
 651 } // namespace anon
 652
 653
 654
 655
 656 namespace cap {
 657
 658 void region(CursorSlice const & i1, CursorSlice const & i2,
 659             Inset::row_type & r1, Inset::row_type & r2,
 660             Inset::col_type & c1, Inset::col_type & c2)
 661 {
 662         Inset & p = i1.inset();
 663         c1 = p.col(i1.idx());
 664         c2 = p.col(i2.idx());
 665         if (c1 > c2)
 666                 swap(c1, c2);
 667         r1 = p.row(i1.idx());
 668         r2 = p.row(i2.idx());
 669         if (r1 > r2)
 670                 swap(r1, r2);
 671 }
 672
 673
 674 docstring grabAndEraseSelection(Cursor & cur)
 675 {
 676         if (!cur.selection())
 677                 return docstring();
 678         docstring res = grabSelection(cur);
 679         eraseSelection(cur);
 680         return res;
 681 }
 682
 683
 684 bool reduceSelectionToOneCell(Cursor & cur)
 685 {
 686         if (!cur.selection() || !cur.inMathed())
 687                 return false;
 688
 689         CursorSlice i1 = cur.selBegin();
 690         CursorSlice i2 = cur.selEnd();
 691         if (!i1.inset().asInsetMath())
 692                 return false;
 693
 694         // the easy case: do nothing if only one cell is selected
 695         if (i1.idx() == i2.idx())
 696                 return true;
 697
 698         cur.top().pos() = 0;
 699         cur.resetAnchor();
 700         cur.top().pos() = cur.top().lastpos();
 701
 702         return true;
 703 }
 704
 705
 706 bool multipleCellsSelected(Cursor const & cur)
 707 {
 708         if (!cur.selection() || !cur.inMathed())
 709                 return false;
 710
 711         CursorSlice i1 = cur.selBegin();
 712         CursorSlice i2 = cur.selEnd();
 713         if (!i1.inset().asInsetMath())
 714                 return false;
 715
 716         if (i1.idx() == i2.idx())
 717                 return false;
 718
 719         return true;
 720 }
 721
 722
 723 void switchBetweenClasses(DocumentClassConstPtr oldone,
 724                 DocumentClassConstPtr newone, InsetText & in, ErrorList & errorlist)
 725 {
 726         errorlist.clear();
 727
 728         LBUFERR(!in.paragraphs().empty());
 729         if (oldone == newone)
 730                 return;
 731
 732         DocumentClass const & oldtc = *oldone;
 733         DocumentClass const & newtc = *newone;
 734
 735         // layouts
 736         ParIterator it = par_iterator_begin(in);
 737         ParIterator end = par_iterator_end(in);
 738         // for remembering which layouts we've had to add
 739         set<docstring> newlayouts;
 740         for (; it != end; ++it) {
 741                 docstring const name = it->layout().name();
 742
 743                 // the pasted text will keep their own layout name. If this layout does
 744                 // not exist in the new document, it will behave like a standard layout.
 745                 bool const added_one = newtc.addLayoutIfNeeded(name);
 746                 if (added_one)
 747                         newlayouts.insert(name);
 748
 749                 if (added_one || newlayouts.find(name) != newlayouts.end()) {
 750                         // Warn the user.
 751                         docstring const s = bformat(_("Layout `%1$s' was not found."), name);
 752                         errorlist.push_back(
 753                                 ErrorItem(_("Layout Not Found"), s, it->id(), 0, it->size()));
 754                 }
 755
 756                 if (in.usePlainLayout())
 757                         it->setLayout(newtc.plainLayout());
 758                 else
 759                         it->setLayout(newtc[name]);
 760         }
 761
 762         // character styles and hidden table cells
 763         InsetIterator const i_end = inset_iterator_end(in);
 764         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 765                 InsetCode const code = it->lyxCode();
 766                 if (code == FLEX_CODE) {
 767                         // FIXME: Should we verify all InsetCollapsable?
 768                         docstring const layoutName = it->layoutName();
 769                         docstring const & n = newone->insetLayout(layoutName).name();
 770                         bool const is_undefined = n.empty() ||
 771                                 n == DocumentClass::plainInsetLayout().name();
 772                         if (!is_undefined)
 773                                 continue;
 774
 775                         // The flex inset is undefined in newtc
 776                         docstring const oldname = from_utf8(oldtc.name());
 777                         docstring const newname = from_utf8(newtc.name());
 778                         docstring s;
 779                         if (oldname == newname)
 780                                 s = bformat(_("Flex inset %1$s is undefined after "
 781                                         "reloading `%2$s' layout."), layoutName, oldname);
 782                         else
 783                                 s = bformat(_("Flex inset %1$s is undefined because of "
 784                                         "conversion from `%2$s' layout to `%3$s'."),
 785                                         layoutName, oldname, newname);
 786                         // To warn the user that something had to be done.
 787                         errorlist.push_back(ErrorItem(
 788                                         _("Undefined flex inset"),
 789                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 790                 } else if (code == TABULAR_CODE) {
 791                         // The recursion above does not catch paragraphs in "hidden" cells,
 792                         // i.e., ones that are part of a multirow or multicolum. So we need
 793                         // to handle those separately.
 794                         // This is the cause of bug #9049.
 795                         InsetTabular * table = it->asInsetTabular();
 796                         table->setLayoutForHiddenCells(newtc);
 797                 }
 798         }
 799 }
 800
 801
 802 vector<docstring> availableSelections(Buffer const * buf)
 803 {
 804         vector<docstring> selList;
 805         if (!buf)
 806                 return selList;
 807
 808         CutStack::const_iterator cit = theCuts.begin();
 809         CutStack::const_iterator end = theCuts.end();
 810         for (; cit != end; ++cit) {
 811                 // we do not use cit-> here because gcc 2.9x does not
 812                 // like it (JMarc)
 813                 ParagraphList const & pars = (*cit).first;
 814                 docstring textSel;
 815                 ParagraphList::const_iterator pit = pars.begin();
 816                 ParagraphList::const_iterator pend = pars.end();
 817                 for (; pit != pend; ++pit) {
 818                         Paragraph par(*pit, 0, 46);
 819                         // adapt paragraph to current buffer.
 820                         par.setBuffer(const_cast<Buffer &>(*buf));
 821                         textSel += par.asString(AS_STR_INSETS);
 822                         if (textSel.size() > 45) {
 823                                 support::truncateWithEllipsis(textSel,45);
 824                                 break;
 825                         }
 826                 }
 827                 selList.push_back(textSel);
 828         }
 829
 830         return selList;
 831 }
 832
 833
 834 size_type numberOfSelections()
 835 {
 836         return theCuts.size();
 837 }
 838
 839
 840 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 841 {
 842         // This doesn't make sense, if there is no selection
 843         if (!cur.selection())
 844                 return;
 845
 846         // OK, we have a selection. This is always between cur.selBegin()
 847         // and cur.selEnd()
 848
 849         if (cur.inTexted()) {
 850                 Text * text = cur.text();
 851                 LBUFERR(text);
 852
 853                 saveSelection(cur);
 854
 855                 // make sure that the depth behind the selection are restored, too
 856                 cur.recordUndoSelection();
 857                 pit_type begpit = cur.selBegin().pit();
 858                 pit_type endpit = cur.selEnd().pit();
 859
 860                 int endpos = cur.selEnd().pos();
 861
 862                 BufferParams const & bp = cur.buffer()->params();
 863                 if (realcut) {
 864                         copySelectionHelper(*cur.buffer(),
 865                                 *text,
 866                                 begpit, endpit,
 867                                 cur.selBegin().pos(), endpos,
 868                                 bp.documentClassPtr(), theCuts);
 869                         // Stuff what we got on the clipboard.
 870                         // Even if there is no selection.
 871                         putClipboard(theCuts[0].first, theCuts[0].second,
 872                                 cur.selectionAsString(true));
 873                 }
 874
 875                 if (begpit != endpit)
 876                         cur.screenUpdateFlags(Update::Force | Update::FitCursor);
 877
 878                 boost::tie(endpit, endpos) =
 879                         eraseSelectionHelper(bp,
 880                                 text->paragraphs(),
 881                                 begpit, endpit,
 882                                 cur.selBegin().pos(), endpos);
 883
 884                 // cutSelection can invalidate the cursor so we need to set
 885                 // it anew. (Lgb)
 886                 // we prefer the end for when tracking changes
 887                 cur.pos() = endpos;
 888                 cur.pit() = endpit;
 889
 890                 // sometimes necessary
 891                 if (doclear
 892                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.track_changes))
 893                         cur.fixIfBroken();
 894
 895                 // need a valid cursor. (Lgb)
 896                 cur.clearSelection();
 897
 898                 // After a cut operation, we must make sure that the Buffer is updated
 899                 // because some further operation might need updated label information for
 900                 // example. So we cannot just use "cur.forceBufferUpdate()" here.
 901                 // This fixes #7071.
 902                 cur.buffer()->updateBuffer();
 903
 904                 // tell tabular that a recent copy happened
 905                 dirtyTabularStack(false);
 906         }
 907
 908         if (cur.inMathed()) {
 909                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 910                         // The current selection spans more than one cell.
 911                         // Record all cells
 912                         cur.recordUndoInset();
 913                 } else {
 914                         // Record only the current cell to avoid a jumping
 915                         // cursor after undo
 916                         cur.recordUndo();
 917                 }
 918                 if (realcut)
 919                         copySelection(cur);
 920                 eraseSelection(cur);
 921         }
 922 }
 923
 924
 925 void copySelection(Cursor const & cur)
 926 {
 927         copySelection(cur, cur.selectionAsString(true));
 928 }
 929
 930
 931 void copyInset(Cursor const & cur, Inset * inset, docstring const & plaintext)
 932 {
 933         ParagraphList pars;
 934         Paragraph par;
 935         BufferParams const & bp = cur.buffer()->params();
 936         par.setLayout(bp.documentClass().plainLayout());
 937         Font font(inherit_font, bp.language);
 938         par.insertInset(0, inset, font, Change(Change::UNCHANGED));
 939         pars.push_back(par);
 940         theCuts.push(make_pair(pars, bp.documentClassPtr()));
 941
 942         // stuff the selection onto the X clipboard, from an explicit copy request
 943         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 944 }
 945
 946
 947 namespace {
 948
 949 void copySelectionToStack(Cursor const & cur, CutStack & cutstack)
 950 {
 951         // this doesn't make sense, if there is no selection
 952         if (!cur.selection())
 953                 return;
 954
 955         // copySelection can not yet handle the case of cross idx selection
 956         if (cur.selBegin().idx() != cur.selEnd().idx())
 957                 return;
 958
 959         if (cur.inTexted()) {
 960                 Text * text = cur.text();
 961                 LBUFERR(text);
 962                 // ok we have a selection. This is always between cur.selBegin()
 963                 // and sel_end cursor
 964
 965                 // copy behind a space if there is one
 966                 ParagraphList & pars = text->paragraphs();
 967                 pos_type pos = cur.selBegin().pos();
 968                 pit_type par = cur.selBegin().pit();
 969                 while (pos < pars[par].size() &&
 970                        pars[par].isLineSeparator(pos) &&
 971                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 972                         ++pos;
 973
 974                 copySelectionHelper(*cur.buffer(), *text, par, cur.selEnd().pit(),
 975                         pos, cur.selEnd().pos(),
 976                         cur.buffer()->params().documentClassPtr(), cutstack);
 977
 978                 // Reset the dirty_tabular_stack_ flag only when something
 979                 // is copied to the clipboard (not to the selectionBuffer).
 980                 if (&cutstack == &theCuts)
 981                         dirtyTabularStack(false);
 982         }
 983
 984         if (cur.inMathed()) {
 985                 //lyxerr << "copySelection in mathed" << endl;
 986                 ParagraphList pars;
 987                 Paragraph par;
 988                 BufferParams const & bp = cur.buffer()->params();
 989                 // FIXME This should be the plain layout...right?
 990                 par.setLayout(bp.documentClass().plainLayout());
 991                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 992                 pars.push_back(par);
 993                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 994         }
 995 }
 996
 997 }
 998
 999
1000 void copySelectionToStack()
1001 {
1002         if (!selectionBuffer.empty())
1003                 theCuts.push(selectionBuffer[0]);
1004 }
1005
1006
1007 void copySelection(Cursor const & cur, docstring const & plaintext)
1008 {
1009         // In tablemode, because copy and paste actually use special table stack
1010         // we do not attempt to get selected paragraphs under cursor. Instead, a
1011         // paragraph with the plain text version is generated so that table cells
1012         // can be pasted as pure text somewhere else.
1013         if (cur.selBegin().idx() != cur.selEnd().idx()) {
1014                 ParagraphList pars;
1015                 Paragraph par;
1016                 BufferParams const & bp = cur.buffer()->params();
1017                 par.setLayout(bp.documentClass().plainLayout());
1018                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
1019                 pars.push_back(par);
1020                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
1021         } else {
1022                 copySelectionToStack(cur, theCuts);
1023         }
1024
1025         // stuff the selection onto the X clipboard, from an explicit copy request
1026         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
1027 }
1028
1029
1030 void saveSelection(Cursor const & cur)
1031 {
1032         // This function is called, not when a selection is formed, but when
1033         // a selection is cleared. Therefore, multiple keyboard selection
1034         // will not repeatively trigger this function (bug 3877).
1035         if (cur.selection()
1036             && cur.selBegin() == cur.bv().cursor().selBegin()
1037             && cur.selEnd() == cur.bv().cursor().selEnd()) {
1038                 LYXERR(Debug::SELECTION, "saveSelection: '" << cur.selectionAsString(true) << "'");
1039                 copySelectionToStack(cur, selectionBuffer);
1040         }
1041 }
1042
1043
1044 bool selection()
1045 {
1046         return !selectionBuffer.empty();
1047 }
1048
1049
1050 void clearSelection()
1051 {
1052         selectionBuffer.clear();
1053 }
1054
1055
1056 void clearCutStack()
1057 {
1058         theCuts.clear();
1059 }
1060
1061
1062 docstring selection(size_t sel_index, DocumentClassConstPtr docclass)
1063 {
1064         if (sel_index >= theCuts.size())
1065                 return docstring();
1066
1067         boost::scoped_ptr<Buffer> buffer(copyToTempBuffer(theCuts[sel_index].first, docclass));
1068         if (!buffer)
1069                 return docstring();
1070
1071         return buffer->paragraphs().back().asString(AS_STR_INSETS | AS_STR_NEWLINES);
1072 }
1073
1074
1075 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
1076                         DocumentClassConstPtr docclass, ErrorList & errorList)
1077 {
1078         if (cur.inTexted()) {
1079                 Text * text = cur.text();
1080                 LBUFERR(text);
1081
1082                 PasteReturnValue prv =
1083                         pasteSelectionHelper(cur, parlist, docclass, 0, errorList);
1084                 cur.forceBufferUpdate();
1085                 cur.clearSelection();
1086                 text->setCursor(cur, prv.par, prv.pos);
1087         }
1088
1089         // mathed is handled in InsetMathNest/InsetMathGrid
1090         LATTEST(!cur.inMathed());
1091 }
1092
1093
1094 bool pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
1095 {
1096         // this does not make sense, if there is nothing to paste
1097         if (!checkPastePossible(sel_index))
1098                 return false;
1099
1100         cur.recordUndo();
1101         pasteParagraphList(cur, theCuts[sel_index].first,
1102                            theCuts[sel_index].second, errorList);
1103         return true;
1104 }
1105
1106
1107 bool pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs,
1108                         Clipboard::TextType type)
1109 {
1110         // Use internal clipboard if it is the most recent one
1111         // This overrides asParagraphs and type on purpose!
1112         if (theClipboard().isInternal())
1113                 return pasteFromStack(cur, errorList, 0);
1114
1115         // First try LyX format
1116         if ((type == Clipboard::LyXTextType ||
1117              type == Clipboard::LyXOrPlainTextType ||
1118              type == Clipboard::AnyTextType) &&
1119             theClipboard().hasTextContents(Clipboard::LyXTextType)) {
1120                 string lyx = theClipboard().getAsLyX();
1121                 if (!lyx.empty()) {
1122                         // For some strange reason gcc 3.2 and 3.3 do not accept
1123                         // Buffer buffer(string(), false);
1124                         Buffer buffer("", false);
1125                         buffer.setUnnamed(true);
1126                         if (buffer.readString(lyx)) {
1127                                 cur.recordUndo();
1128                                 pasteParagraphList(cur, buffer.paragraphs(),
1129                                         buffer.params().documentClassPtr(), errorList);
1130                                 return true;
1131                         }
1132                 }
1133         }
1134
1135         // Then try TeX and HTML
1136         Clipboard::TextType types[2] = {Clipboard::HtmlTextType, Clipboard::LaTeXTextType};
1137         string names[2] = {"html", "latexclipboard"};
1138         for (int i = 0; i < 2; ++i) {
1139                 if (type != types[i] && type != Clipboard::AnyTextType)
1140                         continue;
1141                 bool available = theClipboard().hasTextContents(types[i]);
1142
1143                 // If a specific type was explicitly requested, try to
1144                 // interpret plain text: The user told us that the clipboard
1145                 // contents is in the desired format
1146                 if (!available && type == types[i]) {
1147                         types[i] = Clipboard::PlainTextType;
1148                         available = theClipboard().hasTextContents(types[i]);
1149                 }
1150
1151                 if (available) {
1152                         docstring text = theClipboard().getAsText(types[i]);
1153                         available = !text.empty();
1154                         if (available) {
1155                                 // For some strange reason gcc 3.2 and 3.3 do not accept
1156                                 // Buffer buffer(string(), false);
1157                                 Buffer buffer("", false);
1158                                 buffer.setUnnamed(true);
1159                                 available = buffer.importString(names[i], text, errorList);
1160                                 if (available)
1161                                         available = !buffer.paragraphs().empty();
1162                                 if (available && !buffer.paragraphs()[0].empty()) {
1163                                         cur.recordUndo();
1164                                         pasteParagraphList(cur, buffer.paragraphs(),
1165                                                 buffer.params().documentClassPtr(), errorList);
1166                                         return true;
1167                                 }
1168                         }
1169                 }
1170         }
1171
1172         // Then try plain text
1173         docstring const text = theClipboard().getAsText(Clipboard::PlainTextType);
1174         if (text.empty())
1175                 return false;
1176         cur.recordUndo();
1177         if (asParagraphs)
1178                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1179         else
1180                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1181         return true;
1182 }
1183
1184
1185 void pasteSimpleText(Cursor & cur, bool asParagraphs)
1186 {
1187         docstring text;
1188         // Use internal clipboard if it is the most recent one
1189         if (theClipboard().isInternal()) {
1190                 if (!checkPastePossible(0))
1191                         return;
1192
1193                 ParagraphList const & pars = theCuts[0].first;
1194                 ParagraphList::const_iterator it = pars.begin();
1195                 for (; it != pars.end(); ++it) {
1196                         if (it != pars.begin())
1197                                 text += "\n";
1198                         text += (*it).asString();
1199                 }
1200                 asParagraphs = false;
1201         } else {
1202                 // Then try plain text
1203                 text = theClipboard().getAsText(Clipboard::PlainTextType);
1204         }
1205
1206         if (text.empty())
1207                 return;
1208
1209         cur.recordUndo();
1210         cutSelection(cur, true, false);
1211         if (asParagraphs)
1212                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1213         else
1214                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1215 }
1216
1217
1218 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
1219                             Clipboard::GraphicsType preferedType)
1220 {
1221         LASSERT(theClipboard().hasGraphicsContents(preferedType), return);
1222
1223         // get picture from clipboard
1224         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
1225         if (filename.empty())
1226                 return;
1227
1228         // create inset for graphic
1229         InsetGraphics * inset = new InsetGraphics(cur.buffer());
1230         InsetGraphicsParams params;
1231         params.filename = support::DocFileName(filename.absFileName(), false);
1232         inset->setParams(params);
1233         cur.recordUndo();
1234         cur.insert(inset);
1235 }
1236
1237
1238 void pasteSelection(Cursor & cur, ErrorList & errorList)
1239 {
1240         if (selectionBuffer.empty())
1241                 return;
1242         cur.recordUndo();
1243         pasteParagraphList(cur, selectionBuffer[0].first,
1244                            selectionBuffer[0].second, errorList);
1245 }
1246
1247
1248 void replaceSelectionWithString(Cursor & cur, docstring const & str)
1249 {
1250         cur.recordUndo();
1251         DocIterator selbeg = cur.selectionBegin();
1252
1253         // Get font setting before we cut, we need a copy here, not a bare reference.
1254         Font const font =
1255                 selbeg.paragraph().getFontSettings(cur.buffer()->params(), selbeg.pos());
1256
1257         // Insert the new string
1258         pos_type pos = cur.selEnd().pos();
1259         Paragraph & par = cur.selEnd().paragraph();
1260         docstring::const_iterator cit = str.begin();
1261         docstring::const_iterator end = str.end();
1262         for (; cit != end; ++cit, ++pos)
1263                 par.insertChar(pos, *cit, font, cur.buffer()->params().track_changes);
1264
1265         // Cut the selection
1266         cutSelection(cur, true, false);
1267 }
1268
1269
1270 void replaceSelection(Cursor & cur)
1271 {
1272         if (cur.selection())
1273                 cutSelection(cur, true, false);
1274 }
1275
1276
1277 void eraseSelection(Cursor & cur)
1278 {
1279         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
1280         CursorSlice const & i1 = cur.selBegin();
1281         CursorSlice const & i2 = cur.selEnd();
1282         if (!i1.asInsetMath()) {
1283                 LYXERR0("Can't erase this selection");
1284                 return;
1285         }
1286
1287         saveSelection(cur);
1288         cur.top() = i1;
1289         InsetMath * p = i1.asInsetMath();
1290         if (i1.idx() == i2.idx()) {
1291                 i1.cell().erase(i1.pos(), i2.pos());
1292                 // We may have deleted i1.cell(cur.pos()).
1293                 // Make sure that pos is valid.
1294                 if (cur.pos() > cur.lastpos())
1295                         cur.pos() = cur.lastpos();
1296         } else if (p->nrows() > 0 && p->ncols() > 0) {
1297                 // This is a grid, delete a nice square region
1298                 Inset::row_type r1, r2;
1299                 Inset::col_type c1, c2;
1300                 region(i1, i2, r1, r2, c1, c2);
1301                 for (Inset::row_type row = r1; row <= r2; ++row)
1302                         for (Inset::col_type col = c1; col <= c2; ++col)
1303                                 p->cell(p->index(row, col)).clear();
1304                 // We've deleted the whole cell. Only pos 0 is valid.
1305                 cur.pos() = 0;
1306         } else {
1307                 Inset::idx_type idx1 = i1.idx();
1308                 Inset::idx_type idx2 = i2.idx();
1309                 if (idx1 > idx2)
1310                         swap(idx1, idx2);
1311                 for (Inset::idx_type idx = idx1 ; idx <= idx2; ++idx)
1312                         p->cell(idx).clear();
1313                 // We've deleted the whole cell. Only pos 0 is valid.
1314                 cur.pos() = 0;
1315         }
1316
1317         // need a valid cursor. (Lgb)
1318         cur.clearSelection();
1319         //lyxerr << "cap::eraseSelection end: " << cur << endl;
1320 }
1321
1322
1323 void selDel(Cursor & cur)
1324 {
1325         //lyxerr << "cap::selDel" << endl;
1326         if (cur.selection())
1327                 eraseSelection(cur);
1328 }
1329
1330
1331 void selClearOrDel(Cursor & cur)
1332 {
1333         //lyxerr << "cap::selClearOrDel" << endl;
1334         if (lyxrc.auto_region_delete)
1335                 selDel(cur);
1336         else
1337                 cur.setSelection(false);
1338 }
1339
1340
1341 docstring grabSelection(Cursor const & cur)
1342 {
1343         if (!cur.selection())
1344                 return docstring();
1345
1346 #if 0
1347         // grab selection by glueing multiple cells together. This is not what
1348         // we want because selections spanning multiple cells will get "&" and "\\"
1349         // seperators.
1350         ostringstream os;
1351         for (DocIterator dit = cur.selectionBegin();
1352              dit != cur.selectionEnd(); dit.forwardPos())
1353                 os << asString(dit.cell());
1354         return os.str();
1355 #endif
1356
1357         CursorSlice i1 = cur.selBegin();
1358         CursorSlice i2 = cur.selEnd();
1359
1360         if (i1.idx() == i2.idx()) {
1361                 if (i1.inset().asInsetMath()) {
1362                         MathData::const_iterator it = i1.cell().begin();
1363                         Buffer * buf = cur.buffer();
1364                         return asString(MathData(buf, it + i1.pos(), it + i2.pos()));
1365                 } else {
1366                         return from_ascii("unknown selection 1");
1367                 }
1368         }
1369
1370         Inset::row_type r1, r2;
1371         Inset::col_type c1, c2;
1372         region(i1, i2, r1, r2, c1, c2);
1373
1374         docstring data;
1375         if (i1.inset().asInsetMath()) {
1376                 for (Inset::row_type row = r1; row <= r2; ++row) {
1377                         if (row > r1)
1378                                 data += "\\\\";
1379                         for (Inset::col_type col = c1; col <= c2; ++col) {
1380                                 if (col > c1)
1381                                         data += '&';
1382                                 data += asString(i1.asInsetMath()->
1383                                         cell(i1.asInsetMath()->index(row, col)));
1384                         }
1385                 }
1386         } else {
1387                 data = from_ascii("unknown selection 2");
1388         }
1389         return data;
1390 }
1391
1392
1393 void dirtyTabularStack(bool b)
1394 {
1395         dirty_tabular_stack_ = b;
1396 }
1397
1398
1399 bool tabularStackDirty()
1400 {
1401         return dirty_tabular_stack_;
1402 }
1403
1404
1405 } // namespace cap
1406 } // namespace lyx