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 #include "support/unique_ptr.h"
  66
  67 #include "frontends/alert.h"
  68 #include "frontends/Clipboard.h"
  69 #include "frontends/Selection.h"
  70
  71 #include <boost/tuple/tuple.hpp>
  72
  73 #include <string>
  74
  75 using namespace std;
  76 using namespace lyx::support;
  77 using lyx::frontend::Clipboard;
  78
  79 namespace lyx {
  80
  81 namespace {
  82
  83 typedef pair<pit_type, int> PitPosPair;
  84
  85 typedef limited_stack<pair<ParagraphList, DocumentClassConstPtr> > CutStack;
  86
  87 CutStack theCuts(10);
  88 // persistent selection, cleared until the next selection
  89 CutStack selectionBuffer(1);
  90
  91 // store whether the tabular stack is newer than the normal copy stack
  92 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  93 // when we (hopefully) have a one-for-all paste mechanism.
  94 bool dirty_tabular_stack_ = false;
  95
  96
  97 bool checkPastePossible(int index)
  98 {
  99         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 100 }
 101
 102
 103 struct PasteReturnValue {
 104         PasteReturnValue(pit_type r_pit, pos_type r_pos, bool r_nu) :
 105           pit(r_pit), pos(r_pos), needupdate(r_nu)
 106         {}
 107
 108         pit_type pit;
 109         pos_type pos;
 110         bool needupdate;
 111 };
 112
 113 PasteReturnValue
 114 pasteSelectionHelper(DocIterator const & cur, ParagraphList const & parlist,
 115                      DocumentClassConstPtr oldDocClass, Buffer * tmpbuffer,
 116                      ErrorList & errorlist)
 117 {
 118         Buffer const & buffer = *cur.buffer();
 119         pit_type pit = cur.pit();
 120         pos_type pos = cur.pos();
 121         bool need_update = false;
 122
 123         if (parlist.empty())
 124                 return PasteReturnValue(pit, pos, need_update);
 125
 126         InsetText * target_inset = cur.inset().asInsetText();
 127         if (!target_inset) {
 128                 InsetTabular * it = cur.inset().asInsetTabular();
 129                 target_inset = it ? it->cell(cur.idx())->asInsetText() : 0;
 130         }
 131         LASSERT(target_inset, return PasteReturnValue(pit, pos, need_update));
 132
 133         ParagraphList & pars = target_inset->paragraphs();
 134         LASSERT(pos <= pars[pit].size(),
 135                         return PasteReturnValue(pit, pos, need_update));
 136
 137         // Make a copy of the CaP paragraphs.
 138         ParagraphList insertion = parlist;
 139
 140         // Now remove all out of the pars which is NOT allowed in the
 141         // new environment and set also another font if that is required.
 142
 143         // Convert newline to paragraph break in ParbreakIsNewline
 144         if (target_inset->getLayout().parbreakIsNewline()
 145             || pars[pit].layout().parbreak_is_newline) {
 146                 for (size_t i = 0; i != insertion.size(); ++i) {
 147                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 148                                 if (insertion[i].isNewline(j)) {
 149                                         // do not track deletion of newline
 150                                         insertion[i].eraseChar(j, false);
 151                                         insertion[i].setInsetOwner(target_inset);
 152                                         breakParagraphConservative(
 153                                                         buffer.params(),
 154                                                         insertion, i, j);
 155                                         break;
 156                                 }
 157                         }
 158                 }
 159         }
 160
 161         // set the paragraphs to plain layout if necessary
 162         DocumentClassConstPtr newDocClass = buffer.params().documentClassPtr();
 163         if (cur.inset().usePlainLayout()) {
 164                 bool forcePlainLayout = cur.inset().forcePlainLayout();
 165                 Layout const & plainLayout = newDocClass->plainLayout();
 166                 Layout const & defaultLayout = newDocClass->defaultLayout();
 167                 ParagraphList::iterator const end = insertion.end();
 168                 ParagraphList::iterator par = insertion.begin();
 169                 for (; par != end; ++par) {
 170                         Layout const & parLayout = par->layout();
 171                         if (forcePlainLayout || parLayout == defaultLayout)
 172                                 par->setLayout(plainLayout);
 173                 }
 174         } else {
 175                 // check if we need to reset from plain layout
 176                 Layout const & defaultLayout = newDocClass->defaultLayout();
 177                 Layout const & plainLayout = newDocClass->plainLayout();
 178                 ParagraphList::iterator const end = insertion.end();
 179                 ParagraphList::iterator par = insertion.begin();
 180                 for (; par != end; ++par) {
 181                         Layout const & parLayout = par->layout();
 182                         if (parLayout == plainLayout)
 183                                 par->setLayout(defaultLayout);
 184                 }
 185         }
 186
 187         InsetText in(cur.buffer());
 188         // Make sure there is no class difference.
 189         in.paragraphs().clear();
 190         // This works without copying any paragraph data because we have
 191         // a specialized swap method for ParagraphList. This is important
 192         // since we store pointers to insets at some places and we don't
 193         // want to invalidate them.
 194         insertion.swap(in.paragraphs());
 195         cap::switchBetweenClasses(oldDocClass, newDocClass, in, errorlist);
 196         insertion.swap(in.paragraphs());
 197
 198         ParagraphList::iterator tmpbuf = insertion.begin();
 199         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 200
 201         depth_type max_depth = pars[pit].getMaxDepthAfter();
 202
 203         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 204                 // If we have a negative jump so that the depth would
 205                 // go below 0 depth then we have to redo the delta to
 206                 // this new max depth level so that subsequent
 207                 // paragraphs are aligned correctly to this paragraph
 208                 // at level 0.
 209                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 210                         depth_delta = 0;
 211
 212                 // Set the right depth so that we are not too deep or shallow.
 213                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 214                 if (tmpbuf->params().depth() > max_depth)
 215                         tmpbuf->params().depth(max_depth);
 216
 217                 // Set max_depth for the next paragraph
 218                 max_depth = tmpbuf->getMaxDepthAfter();
 219
 220                 // Set the inset owner of this paragraph.
 221                 tmpbuf->setInsetOwner(target_inset);
 222                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 223                         // do not track deletion of invalid insets
 224                         if (Inset * inset = tmpbuf->getInset(i))
 225                                 if (!target_inset->insetAllowed(inset->lyxCode()))
 226                                         tmpbuf->eraseChar(i--, false);
 227                 }
 228
 229                 tmpbuf->setChange(Change(buffer.params().track_changes ?
 230                                          Change::INSERTED : Change::UNCHANGED));
 231         }
 232
 233         bool const empty = pars[pit].empty();
 234         if (!empty) {
 235                 // Make the buf exactly the same layout as the cursor
 236                 // paragraph.
 237                 insertion.begin()->makeSameLayout(pars[pit]);
 238         }
 239
 240         // Prepare the paragraphs and insets for insertion.
 241         insertion.swap(in.paragraphs());
 242
 243         InsetIterator const i_end = inset_iterator_end(in);
 244         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 245                 // Even though this will also be done later, it has to be done here
 246                 // since some inset might going to try to access
 247                 // the buffer() member.
 248                 it->setBuffer(const_cast<Buffer &>(buffer));
 249                 switch (it->lyxCode()) {
 250
 251                 case MATH_HULL_CODE: {
 252                         // check for equation labels and resolve duplicates
 253                         InsetMathHull * ins = it->asInsetMath()->asHullInset();
 254                         std::vector<InsetLabel *> labels = ins->getLabels();
 255                         for (size_t i = 0; i != labels.size(); ++i) {
 256                                 if (!labels[i])
 257                                         continue;
 258                                 InsetLabel * lab = labels[i];
 259                                 docstring const oldname = lab->getParam("name");
 260                                 lab->updateLabel(oldname);
 261                                 // We need to update the buffer reference cache.
 262                                 need_update = true;
 263                                 docstring const newname = lab->getParam("name");
 264                                 if (oldname == newname)
 265                                         continue;
 266                                 // adapt the references
 267                                 for (InsetIterator itt = inset_iterator_begin(in);
 268                                       itt != i_end; ++itt) {
 269                                         if (itt->lyxCode() == REF_CODE) {
 270                                                 InsetCommand * ref = itt->asInsetCommand();
 271                                                 if (ref->getParam("reference") == oldname)
 272                                                         ref->setParam("reference", newname);
 273                                         } else if (itt->lyxCode() == MATH_REF_CODE) {
 274                                                 InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 275                                                 // this is necessary to prevent an uninitialized
 276                                                 // buffer when the RefInset is in a MathBox.
 277                                                 // FIXME audit setBuffer calls
 278                                                 mi->setBuffer(const_cast<Buffer &>(buffer));
 279                                                 if (mi->getTarget() == oldname)
 280                                                         mi->changeTarget(newname);
 281                                         }
 282                                 }
 283                         }
 284                         break;
 285                 }
 286
 287                 case LABEL_CODE: {
 288                         // check for duplicates
 289                         InsetLabel & lab = static_cast<InsetLabel &>(*it);
 290                         docstring const oldname = lab.getParam("name");
 291                         lab.updateLabel(oldname);
 292                         // We need to update the buffer reference cache.
 293                         need_update = true;
 294                         docstring const newname = lab.getParam("name");
 295                         if (oldname == newname)
 296                                 break;
 297                         // adapt the references
 298                         for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 299                                 if (itt->lyxCode() == REF_CODE) {
 300                                         InsetCommand & ref = static_cast<InsetCommand &>(*itt);
 301                                         if (ref.getParam("reference") == oldname)
 302                                                 ref.setParam("reference", newname);
 303                                 } else if (itt->lyxCode() == MATH_REF_CODE) {
 304                                         InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 305                                         // this is necessary to prevent an uninitialized
 306                                         // buffer when the RefInset is in a MathBox.
 307                                         // FIXME audit setBuffer calls
 308                                         mi->setBuffer(const_cast<Buffer &>(buffer));
 309                                         if (mi->getTarget() == oldname)
 310                                                 mi->changeTarget(newname);
 311                                 }
 312                         }
 313                         break;
 314                 }
 315
 316                 case INCLUDE_CODE: {
 317                         InsetInclude & inc = static_cast<InsetInclude &>(*it);
 318                         inc.updateCommand();
 319                         // We need to update the list of included files.
 320                         need_update = true;
 321                         break;
 322                 }
 323
 324                 case BIBITEM_CODE: {
 325                         // check for duplicates
 326                         InsetBibitem & bib = static_cast<InsetBibitem &>(*it);
 327                         docstring const oldkey = bib.getParam("key");
 328                         bib.updateCommand(oldkey, false);
 329                         // We need to update the buffer reference cache.
 330                         need_update = true;
 331                         docstring const newkey = bib.getParam("key");
 332                         if (oldkey == newkey)
 333                                 break;
 334                         // adapt the references
 335                         for (InsetIterator itt = inset_iterator_begin(in);
 336                              itt != i_end; ++itt) {
 337                                 if (itt->lyxCode() == CITE_CODE) {
 338                                         InsetCommand * ref = itt->asInsetCommand();
 339                                         if (ref->getParam("key") == oldkey)
 340                                                 ref->setParam("key", newkey);
 341                                 }
 342                         }
 343                         break;
 344                 }
 345
 346                 case BRANCH_CODE: {
 347                         // check if branch is known to target buffer
 348                         // or its master
 349                         InsetBranch & br = static_cast<InsetBranch &>(*it);
 350                         docstring const name = br.branch();
 351                         if (name.empty())
 352                                 break;
 353                         bool const is_child = (&buffer != buffer.masterBuffer());
 354                         BranchList branchlist = buffer.params().branchlist();
 355                         if ((!is_child && branchlist.find(name))
 356                             || (is_child && (branchlist.find(name)
 357                                 || buffer.masterBuffer()->params().branchlist().find(name))))
 358                                 break;
 359                         if (tmpbuffer) {
 360                                 // This is for a temporary buffer, so simply create the branch.
 361                                 // Must not use lyx::dispatch(), since tmpbuffer has no view.
 362                                 DispatchResult dr;
 363                                 tmpbuffer->dispatch(FuncRequest(LFUN_BRANCH_ADD, name), dr);
 364                         } else {
 365                                 docstring text = bformat(
 366                                         _("The pasted branch \"%1$s\" is undefined.\n"
 367                                           "Do you want to add it to the document's branch list?"),
 368                                         name);
 369                                 if (frontend::Alert::prompt(_("Unknown branch"),
 370                                           text, 0, 1, _("&Add"), _("&Don't Add")) != 0)
 371                                         break;
 372                                 lyx::dispatch(FuncRequest(LFUN_BRANCH_ADD, name));
 373                         }
 374                         // We need to update the list of branches.
 375                         need_update = true;
 376                         break;
 377                 }
 378
 379                 default:
 380                         break; // nothing
 381                 }
 382         }
 383         insertion.swap(in.paragraphs());
 384
 385         // Split the paragraph for inserting the buf if necessary.
 386         if (!empty)
 387                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 388
 389         // Paste it!
 390         if (empty) {
 391                 pars.insert(lyx::next(pars.begin(), pit),
 392                             insertion.begin(),
 393                             insertion.end());
 394
 395                 // merge the empty par with the last par of the insertion
 396                 mergeParagraph(buffer.params(), pars,
 397                                pit + insertion.size() - 1);
 398         } else {
 399                 pars.insert(lyx::next(pars.begin(), pit + 1),
 400                             insertion.begin(),
 401                             insertion.end());
 402
 403                 // merge the first par of the insertion with the current par
 404                 mergeParagraph(buffer.params(), pars, pit);
 405         }
 406
 407         // Store the new cursor position.
 408         pit_type last_paste = pit + insertion.size() - 1;
 409         pit_type startpit = pit;
 410         pit = last_paste;
 411         pos = pars[last_paste].size();
 412
 413         // FIXME Should we do it here, or should we let updateBuffer() do it?
 414         // Set paragraph buffers. It's important to do this right away
 415         // before something calls Inset::buffer() and causes a crash.
 416         for (pit_type p = startpit; p <= pit; ++p)
 417                 pars[p].setBuffer(const_cast<Buffer &>(buffer));
 418
 419         // Join (conditionally) last pasted paragraph with next one, i.e.,
 420         // the tail of the spliced document paragraph
 421         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 422                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 423                         mergeParagraph(buffer.params(), pars, last_paste);
 424                 } else if (pars[last_paste + 1].empty()) {
 425                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 426                         mergeParagraph(buffer.params(), pars, last_paste);
 427                 } else if (pars[last_paste].empty()) {
 428                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 429                         mergeParagraph(buffer.params(), pars, last_paste);
 430                 } else {
 431                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().track_changes);
 432                         ++last_paste;
 433                 }
 434         }
 435
 436         return PasteReturnValue(pit, pos, need_update);
 437 }
 438
 439
 440 PitPosPair eraseSelectionHelper(BufferParams const & params,
 441         ParagraphList & pars,
 442         pit_type startpit, pit_type endpit,
 443         int startpos, int endpos)
 444 {
 445         // Start of selection is really invalid.
 446         if (startpit == pit_type(pars.size()) ||
 447             (startpos > pars[startpit].size()))
 448                 return PitPosPair(endpit, endpos);
 449
 450         // Start and end is inside same paragraph
 451         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 452                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.track_changes);
 453                 return PitPosPair(endpit, endpos);
 454         }
 455
 456         for (pit_type pit = startpit; pit != endpit + 1;) {
 457                 pos_type const left  = (pit == startpit ? startpos : 0);
 458                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 459                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.track_changes);
 460
 461                 // Logically erase only, including the end-of-paragraph character
 462                 pars[pit].eraseChars(left, right, params.track_changes);
 463
 464                 // Separate handling of paragraph break:
 465                 if (merge && pit != endpit &&
 466                     (pit + 1 != endpit
 467                      || pars[pit].hasSameLayout(pars[endpit])
 468                      || pars[endpit].size() == endpos)) {
 469                         if (pit + 1 == endpit)
 470                                 endpos += pars[pit].size();
 471                         mergeParagraph(params, pars, pit);
 472                         --endpit;
 473                 } else
 474                         ++pit;
 475         }
 476
 477         // Ensure legal cursor pos:
 478         endpit = startpit;
 479         endpos = startpos;
 480         return PitPosPair(endpit, endpos);
 481 }
 482
 483
 484 Buffer * copyToTempBuffer(ParagraphList const & paragraphs, DocumentClassConstPtr docclass)
 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 0);
 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         return buffer;
 526 }
 527
 528
 529 void putClipboard(ParagraphList const & paragraphs,
 530         DocumentClassConstPtr docclass, docstring const & plaintext)
 531 {
 532         Buffer * buffer = copyToTempBuffer(paragraphs, docclass);
 533         if (!buffer) // already asserted in copyToTempBuffer()
 534                 return;
 535
 536         // We don't want to produce images that are not used. Therefore,
 537         // output formulas as MathML. Even if this is not understood by all
 538         // applications, the number that can parse it should go up in the future.
 539         buffer->params().html_math_output = BufferParams::MathML;
 540
 541         // Make sure MarkAsExporting is deleted before buffer is
 542         {
 543                 // The Buffer is being used to export. This is necessary so that the
 544                 // updateMacros call will record the needed information.
 545                 MarkAsExporting mex(buffer);
 546
 547                 buffer->updateBuffer(Buffer::UpdateMaster, OutputUpdate);
 548                 buffer->updateMacros();
 549                 buffer->updateMacroInstances(OutputUpdate);
 550
 551                 // LyX's own format
 552                 string lyx;
 553                 ostringstream oslyx;
 554                 if (buffer->write(oslyx))
 555                         lyx = oslyx.str();
 556
 557                 // XHTML format
 558                 odocstringstream oshtml;
 559                 OutputParams runparams(encodings.fromLyXName("utf8"));
 560                 // We do not need to produce images, etc.
 561                 runparams.dryrun = true;
 562                 // We are not interested in errors (bug 8866)
 563                 runparams.silent = true;
 564                 buffer->writeLyXHTMLSource(oshtml, runparams, Buffer::FullSource);
 565
 566                 theClipboard().put(lyx, oshtml.str(), plaintext);
 567         }
 568
 569         // Save that memory
 570         delete buffer;
 571 }
 572
 573
 574 /// return true if the whole ParagraphList is deleted
 575 static bool isFullyDeleted(ParagraphList const & pars)
 576 {
 577         pit_type const pars_size = static_cast<pit_type>(pars.size());
 578
 579         // check all paragraphs
 580         for (pit_type pit = 0; pit < pars_size; ++pit) {
 581                 if (!pars[pit].empty())   // prevent assertion failure
 582                         if (!pars[pit].isDeleted(0, pars[pit].size()))
 583                                 return false;
 584         }
 585         return true;
 586 }
 587
 588
 589 void copySelectionHelper(Buffer const & buf, Text const & text,
 590         pit_type startpit, pit_type endpit,
 591         int start, int end, DocumentClassConstPtr dc, CutStack & cutstack)
 592 {
 593         ParagraphList const & pars = text.paragraphs();
 594
 595         // In most of these cases, we can try to recover.
 596         LASSERT(0 <= start, start = 0);
 597         LASSERT(start <= pars[startpit].size(), start = pars[startpit].size());
 598         LASSERT(0 <= end, end = 0);
 599         LASSERT(end <= pars[endpit].size(), end = pars[endpit].size());
 600         LASSERT(startpit != endpit || start <= end, return);
 601
 602         // Clone the paragraphs within the selection.
 603         ParagraphList copy_pars(lyx::next(pars.begin(), startpit),
 604                                 lyx::next(pars.begin(), endpit + 1));
 605
 606         // Remove the end of the last paragraph; afterwards, remove the
 607         // beginning of the first paragraph. Keep this order - there may only
 608         // be one paragraph!  Do not track deletions here; this is an internal
 609         // action not visible to the user
 610
 611         Paragraph & back = copy_pars.back();
 612         back.eraseChars(end, back.size(), false);
 613         Paragraph & front = copy_pars.front();
 614         front.eraseChars(0, start, false);
 615
 616         ParagraphList::iterator it = copy_pars.begin();
 617         ParagraphList::iterator it_end = copy_pars.end();
 618
 619         for (; it != it_end; ++it) {
 620                 // Since we have a copy of the paragraphs, the insets
 621                 // do not have a proper buffer reference. It makes
 622                 // sense to add them temporarily, because the
 623                 // operations below depend on that (acceptChanges included).
 624                 it->setBuffer(const_cast<Buffer &>(buf));
 625                 // PassThru paragraphs have the Language
 626                 // latex_language. This is invalid for others, so we
 627                 // need to change it to the buffer language.
 628                 if (it->isPassThru())
 629                         it->changeLanguage(buf.params(),
 630                                            latex_language, buf.language());
 631         }
 632
 633         // do not copy text (also nested in insets) which is marked as
 634         // deleted, unless the whole selection was deleted
 635         if (!isFullyDeleted(copy_pars))
 636                 acceptChanges(copy_pars, buf.params());
 637         else
 638                 rejectChanges(copy_pars, buf.params());
 639
 640
 641         // do some final cleanup now, to make sure that the paragraphs
 642         // are not linked to something else.
 643         it = copy_pars.begin();
 644         for (; it != it_end; ++it) {
 645                 it->setBuffer(*static_cast<Buffer *>(0));
 646                 it->setInsetOwner(0);
 647         }
 648
 649         cutstack.push(make_pair(copy_pars, dc));
 650 }
 651
 652 } // namespace anon
 653
 654
 655
 656
 657 namespace cap {
 658
 659 void region(CursorSlice const & i1, CursorSlice const & i2,
 660             Inset::row_type & r1, Inset::row_type & r2,
 661             Inset::col_type & c1, Inset::col_type & c2)
 662 {
 663         Inset & p = i1.inset();
 664         c1 = p.col(i1.idx());
 665         c2 = p.col(i2.idx());
 666         if (c1 > c2)
 667                 swap(c1, c2);
 668         r1 = p.row(i1.idx());
 669         r2 = p.row(i2.idx());
 670         if (r1 > r2)
 671                 swap(r1, r2);
 672 }
 673
 674
 675 docstring grabAndEraseSelection(Cursor & cur)
 676 {
 677         if (!cur.selection())
 678                 return docstring();
 679         docstring res = grabSelection(cur);
 680         eraseSelection(cur);
 681         return res;
 682 }
 683
 684
 685 bool reduceSelectionToOneCell(Cursor & cur)
 686 {
 687         if (!cur.selection() || !cur.inMathed())
 688                 return false;
 689
 690         CursorSlice i1 = cur.selBegin();
 691         CursorSlice i2 = cur.selEnd();
 692         if (!i1.inset().asInsetMath())
 693                 return false;
 694
 695         // the easy case: do nothing if only one cell is selected
 696         if (i1.idx() == i2.idx())
 697                 return true;
 698
 699         cur.top().pos() = 0;
 700         cur.resetAnchor();
 701         cur.top().pos() = cur.top().lastpos();
 702
 703         return true;
 704 }
 705
 706
 707 bool multipleCellsSelected(Cursor const & cur)
 708 {
 709         if (!cur.selection() || !cur.inMathed())
 710                 return false;
 711
 712         CursorSlice i1 = cur.selBegin();
 713         CursorSlice i2 = cur.selEnd();
 714         if (!i1.inset().asInsetMath())
 715                 return false;
 716
 717         if (i1.idx() == i2.idx())
 718                 return false;
 719
 720         return true;
 721 }
 722
 723
 724 void switchBetweenClasses(DocumentClassConstPtr oldone,
 725                 DocumentClassConstPtr newone, InsetText & in, ErrorList & errorlist)
 726 {
 727         errorlist.clear();
 728
 729         LBUFERR(!in.paragraphs().empty());
 730         if (oldone == newone)
 731                 return;
 732
 733         DocumentClass const & oldtc = *oldone;
 734         DocumentClass const & newtc = *newone;
 735
 736         // layouts
 737         ParIterator it = par_iterator_begin(in);
 738         ParIterator end = par_iterator_end(in);
 739         // for remembering which layouts we've had to add
 740         set<docstring> newlayouts;
 741         for (; it != end; ++it) {
 742                 docstring const name = it->layout().name();
 743
 744                 // the pasted text will keep their own layout name. If this layout does
 745                 // not exist in the new document, it will behave like a standard layout.
 746                 bool const added_one = newtc.addLayoutIfNeeded(name);
 747                 if (added_one)
 748                         newlayouts.insert(name);
 749
 750                 if (added_one || newlayouts.find(name) != newlayouts.end()) {
 751                         // Warn the user.
 752                         docstring const s = bformat(_("Layout `%1$s' was not found."), name);
 753                         errorlist.push_back(
 754                                 ErrorItem(_("Layout Not Found"), s, it->id(), 0, it->size()));
 755                 }
 756
 757                 if (in.usePlainLayout())
 758                         it->setLayout(newtc.plainLayout());
 759                 else
 760                         it->setLayout(newtc[name]);
 761         }
 762
 763         // character styles and hidden table cells
 764         InsetIterator const i_end = inset_iterator_end(in);
 765         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 766                 InsetCode const code = it->lyxCode();
 767                 if (code == FLEX_CODE) {
 768                         // FIXME: Should we verify all InsetCollapsable?
 769                         docstring const layoutName = it->layoutName();
 770                         docstring const & n = newone->insetLayout(layoutName).name();
 771                         bool const is_undefined = n.empty() ||
 772                                 n == DocumentClass::plainInsetLayout().name();
 773                         if (!is_undefined)
 774                                 continue;
 775
 776                         // The flex inset is undefined in newtc
 777                         docstring const oldname = from_utf8(oldtc.name());
 778                         docstring const newname = from_utf8(newtc.name());
 779                         docstring s;
 780                         if (oldname == newname)
 781                                 s = bformat(_("Flex inset %1$s is undefined after "
 782                                         "reloading `%2$s' layout."), layoutName, oldname);
 783                         else
 784                                 s = bformat(_("Flex inset %1$s is undefined because of "
 785                                         "conversion from `%2$s' layout to `%3$s'."),
 786                                         layoutName, oldname, newname);
 787                         // To warn the user that something had to be done.
 788                         errorlist.push_back(ErrorItem(
 789                                         _("Undefined flex inset"),
 790                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 791                 } else if (code == TABULAR_CODE) {
 792                         // The recursion above does not catch paragraphs in "hidden" cells,
 793                         // i.e., ones that are part of a multirow or multicolum. So we need
 794                         // to handle those separately.
 795                         // This is the cause of bug #9049.
 796                         InsetTabular * table = it->asInsetTabular();
 797                         table->setLayoutForHiddenCells(newtc);
 798                 }
 799         }
 800 }
 801
 802
 803 vector<docstring> availableSelections(Buffer const * buf)
 804 {
 805         vector<docstring> selList;
 806         if (!buf)
 807                 return selList;
 808
 809         CutStack::const_iterator cit = theCuts.begin();
 810         CutStack::const_iterator end = theCuts.end();
 811         for (; cit != end; ++cit) {
 812                 // we do not use cit-> here because gcc 2.9x does not
 813                 // like it (JMarc)
 814                 ParagraphList const & pars = (*cit).first;
 815                 docstring textSel;
 816                 ParagraphList::const_iterator pit = pars.begin();
 817                 ParagraphList::const_iterator pend = pars.end();
 818                 for (; pit != pend; ++pit) {
 819                         Paragraph par(*pit, 0, 46);
 820                         // adapt paragraph to current buffer.
 821                         par.setBuffer(const_cast<Buffer &>(*buf));
 822                         textSel += par.asString(AS_STR_INSETS);
 823                         if (textSel.size() > 45) {
 824                                 support::truncateWithEllipsis(textSel,45);
 825                                 break;
 826                         }
 827                 }
 828                 selList.push_back(textSel);
 829         }
 830
 831         return selList;
 832 }
 833
 834
 835 size_type numberOfSelections()
 836 {
 837         return theCuts.size();
 838 }
 839
 840
 841 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 842 {
 843         // This doesn't make sense, if there is no selection
 844         if (!cur.selection())
 845                 return;
 846
 847         // OK, we have a selection. This is always between cur.selBegin()
 848         // and cur.selEnd()
 849
 850         if (cur.inTexted()) {
 851                 Text * text = cur.text();
 852                 LBUFERR(text);
 853
 854                 saveSelection(cur);
 855
 856                 // make sure that the depth behind the selection are restored, too
 857                 cur.recordUndoSelection();
 858                 pit_type begpit = cur.selBegin().pit();
 859                 pit_type endpit = cur.selEnd().pit();
 860
 861                 int endpos = cur.selEnd().pos();
 862
 863                 BufferParams const & bp = cur.buffer()->params();
 864                 if (realcut) {
 865                         copySelectionHelper(*cur.buffer(),
 866                                 *text,
 867                                 begpit, endpit,
 868                                 cur.selBegin().pos(), endpos,
 869                                 bp.documentClassPtr(), theCuts);
 870                         // Stuff what we got on the clipboard.
 871                         // Even if there is no selection.
 872                         putClipboard(theCuts[0].first, theCuts[0].second,
 873                                 cur.selectionAsString(true));
 874                 }
 875
 876                 if (begpit != endpit)
 877                         cur.screenUpdateFlags(Update::Force | Update::FitCursor);
 878
 879                 boost::tie(endpit, endpos) =
 880                         eraseSelectionHelper(bp,
 881                                 text->paragraphs(),
 882                                 begpit, endpit,
 883                                 cur.selBegin().pos(), endpos);
 884
 885                 // cutSelection can invalidate the cursor so we need to set
 886                 // it anew. (Lgb)
 887                 // we prefer the end for when tracking changes
 888                 cur.pos() = endpos;
 889                 cur.pit() = endpit;
 890
 891                 // sometimes necessary
 892                 if (doclear
 893                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.track_changes))
 894                         cur.fixIfBroken();
 895
 896                 // need a valid cursor. (Lgb)
 897                 cur.clearSelection();
 898
 899                 // After a cut operation, we must make sure that the Buffer is updated
 900                 // because some further operation might need updated label information for
 901                 // example. So we cannot just use "cur.forceBufferUpdate()" here.
 902                 // This fixes #7071.
 903                 cur.buffer()->updateBuffer();
 904
 905                 // tell tabular that a recent copy happened
 906                 dirtyTabularStack(false);
 907         }
 908
 909         if (cur.inMathed()) {
 910                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 911                         // The current selection spans more than one cell.
 912                         // Record all cells
 913                         cur.recordUndoInset();
 914                 } else {
 915                         // Record only the current cell to avoid a jumping
 916                         // cursor after undo
 917                         cur.recordUndo();
 918                 }
 919                 if (realcut)
 920                         copySelection(cur);
 921                 eraseSelection(cur);
 922         }
 923 }
 924
 925
 926 void copySelection(Cursor const & cur)
 927 {
 928         copySelection(cur, cur.selectionAsString(true));
 929 }
 930
 931
 932 void copyInset(Cursor const & cur, Inset * inset, docstring const & plaintext)
 933 {
 934         ParagraphList pars;
 935         Paragraph par;
 936         BufferParams const & bp = cur.buffer()->params();
 937         par.setLayout(bp.documentClass().plainLayout());
 938         Font font(inherit_font, bp.language);
 939         par.insertInset(0, inset, font, Change(Change::UNCHANGED));
 940         pars.push_back(par);
 941         theCuts.push(make_pair(pars, bp.documentClassPtr()));
 942
 943         // stuff the selection onto the X clipboard, from an explicit copy request
 944         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 945 }
 946
 947
 948 namespace {
 949
 950 void copySelectionToStack(Cursor const & cur, CutStack & cutstack)
 951 {
 952         // this doesn't make sense, if there is no selection
 953         if (!cur.selection())
 954                 return;
 955
 956         // copySelection can not yet handle the case of cross idx selection
 957         if (cur.selBegin().idx() != cur.selEnd().idx())
 958                 return;
 959
 960         if (cur.inTexted()) {
 961                 Text * text = cur.text();
 962                 LBUFERR(text);
 963                 // ok we have a selection. This is always between cur.selBegin()
 964                 // and sel_end cursor
 965                 copySelectionHelper(*cur.buffer(), *text,
 966                                     cur.selBegin().pit(), cur.selEnd().pit(),
 967                                     cur.selBegin().pos(), cur.selEnd().pos(),
 968                                     cur.buffer()->params().documentClassPtr(),
 969                                     cutstack);
 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, DocumentClassConstPtr docclass)
1055 {
1056         if (sel_index >= theCuts.size())
1057                 return docstring();
1058
1059         unique_ptr<Buffer> buffer(copyToTempBuffer(theCuts[sel_index].first,
1060                                                    docclass));
1061         if (!buffer)
1062                 return docstring();
1063
1064         return buffer->paragraphs().back().asString(AS_STR_INSETS | AS_STR_NEWLINES);
1065 }
1066
1067
1068 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
1069                         DocumentClassConstPtr docclass, ErrorList & errorList)
1070 {
1071         if (cur.inTexted()) {
1072                 Text * text = cur.text();
1073                 LBUFERR(text);
1074
1075                 PasteReturnValue prv =
1076                         pasteSelectionHelper(cur, parlist, docclass, 0, errorList);
1077                 cur.forceBufferUpdate();
1078                 cur.clearSelection();
1079                 text->setCursor(cur, prv.pit, prv.pos);
1080         }
1081
1082         // mathed is handled in InsetMathNest/InsetMathGrid
1083         LATTEST(!cur.inMathed());
1084 }
1085
1086
1087 bool pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
1088 {
1089         // this does not make sense, if there is nothing to paste
1090         if (!checkPastePossible(sel_index))
1091                 return false;
1092
1093         cur.recordUndo();
1094         pasteParagraphList(cur, theCuts[sel_index].first,
1095                            theCuts[sel_index].second, errorList);
1096         return true;
1097 }
1098
1099
1100 bool pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs,
1101                         Clipboard::TextType type)
1102 {
1103         // Use internal clipboard if it is the most recent one
1104         // This overrides asParagraphs and type on purpose!
1105         if (theClipboard().isInternal())
1106                 return pasteFromStack(cur, errorList, 0);
1107
1108         // First try LyX format
1109         if ((type == Clipboard::LyXTextType ||
1110              type == Clipboard::LyXOrPlainTextType ||
1111              type == Clipboard::AnyTextType) &&
1112             theClipboard().hasTextContents(Clipboard::LyXTextType)) {
1113                 string lyx = theClipboard().getAsLyX();
1114                 if (!lyx.empty()) {
1115                         // For some strange reason gcc 3.2 and 3.3 do not accept
1116                         // Buffer buffer(string(), false);
1117                         Buffer buffer("", false);
1118                         buffer.setUnnamed(true);
1119                         if (buffer.readString(lyx)) {
1120                                 cur.recordUndo();
1121                                 pasteParagraphList(cur, buffer.paragraphs(),
1122                                         buffer.params().documentClassPtr(), errorList);
1123                                 return true;
1124                         }
1125                 }
1126         }
1127
1128         // Then try TeX and HTML
1129         Clipboard::TextType types[2] = {Clipboard::HtmlTextType, Clipboard::LaTeXTextType};
1130         string names[2] = {"html", "latexclipboard"};
1131         for (int i = 0; i < 2; ++i) {
1132                 if (type != types[i] && type != Clipboard::AnyTextType)
1133                         continue;
1134                 bool available = theClipboard().hasTextContents(types[i]);
1135
1136                 // If a specific type was explicitly requested, try to
1137                 // interpret plain text: The user told us that the clipboard
1138                 // contents is in the desired format
1139                 if (!available && type == types[i]) {
1140                         types[i] = Clipboard::PlainTextType;
1141                         available = theClipboard().hasTextContents(types[i]);
1142                 }
1143
1144                 if (available) {
1145                         docstring text = theClipboard().getAsText(types[i]);
1146                         available = !text.empty();
1147                         if (available) {
1148                                 // For some strange reason gcc 3.2 and 3.3 do not accept
1149                                 // Buffer buffer(string(), false);
1150                                 Buffer buffer("", false);
1151                                 buffer.setUnnamed(true);
1152                                 available = buffer.importString(names[i], text, errorList);
1153                                 if (available)
1154                                         available = !buffer.paragraphs().empty();
1155                                 if (available && !buffer.paragraphs()[0].empty()) {
1156                                         cur.recordUndo();
1157                                         pasteParagraphList(cur, buffer.paragraphs(),
1158                                                 buffer.params().documentClassPtr(), errorList);
1159                                         return true;
1160                                 }
1161                         }
1162                 }
1163         }
1164
1165         // Then try plain text
1166         docstring const text = theClipboard().getAsText(Clipboard::PlainTextType);
1167         if (text.empty())
1168                 return false;
1169         cur.recordUndo();
1170         if (asParagraphs)
1171                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1172         else
1173                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1174         return true;
1175 }
1176
1177
1178 void pasteSimpleText(Cursor & cur, bool asParagraphs)
1179 {
1180         docstring text;
1181         // Use internal clipboard if it is the most recent one
1182         if (theClipboard().isInternal()) {
1183                 if (!checkPastePossible(0))
1184                         return;
1185
1186                 ParagraphList const & pars = theCuts[0].first;
1187                 ParagraphList::const_iterator it = pars.begin();
1188                 for (; it != pars.end(); ++it) {
1189                         if (it != pars.begin())
1190                                 text += "\n";
1191                         text += (*it).asString();
1192                 }
1193                 asParagraphs = false;
1194         } else {
1195                 // Then try plain text
1196                 text = theClipboard().getAsText(Clipboard::PlainTextType);
1197         }
1198
1199         if (text.empty())
1200                 return;
1201
1202         cur.recordUndo();
1203         cutSelection(cur, true, false);
1204         if (asParagraphs)
1205                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1206         else
1207                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1208 }
1209
1210
1211 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
1212                             Clipboard::GraphicsType preferedType)
1213 {
1214         LASSERT(theClipboard().hasGraphicsContents(preferedType), return);
1215
1216         // get picture from clipboard
1217         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
1218         if (filename.empty())
1219                 return;
1220
1221         // create inset for graphic
1222         InsetGraphics * inset = new InsetGraphics(cur.buffer());
1223         InsetGraphicsParams params;
1224         params.filename = support::DocFileName(filename.absFileName(), false);
1225         inset->setParams(params);
1226         cur.recordUndo();
1227         cur.insert(inset);
1228 }
1229
1230
1231 void pasteSelection(Cursor & cur, ErrorList & errorList)
1232 {
1233         if (selectionBuffer.empty())
1234                 return;
1235         cur.recordUndo();
1236         pasteParagraphList(cur, selectionBuffer[0].first,
1237                            selectionBuffer[0].second, errorList);
1238 }
1239
1240
1241 void replaceSelectionWithString(Cursor & cur, docstring const & str)
1242 {
1243         cur.recordUndo();
1244         DocIterator selbeg = cur.selectionBegin();
1245
1246         // Get font setting before we cut, we need a copy here, not a bare reference.
1247         Font const font =
1248                 selbeg.paragraph().getFontSettings(cur.buffer()->params(), selbeg.pos());
1249
1250         // Insert the new string
1251         pos_type pos = cur.selEnd().pos();
1252         Paragraph & par = cur.selEnd().paragraph();
1253         docstring::const_iterator cit = str.begin();
1254         docstring::const_iterator end = str.end();
1255         for (; cit != end; ++cit, ++pos)
1256                 par.insertChar(pos, *cit, font, cur.buffer()->params().track_changes);
1257
1258         // Cut the selection
1259         cutSelection(cur, true, false);
1260 }
1261
1262
1263 void replaceSelection(Cursor & cur)
1264 {
1265         if (cur.selection())
1266                 cutSelection(cur, true, false);
1267 }
1268
1269
1270 void eraseSelection(Cursor & cur)
1271 {
1272         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
1273         CursorSlice const & i1 = cur.selBegin();
1274         CursorSlice const & i2 = cur.selEnd();
1275         if (!i1.asInsetMath()) {
1276                 LYXERR0("Can't erase this selection");
1277                 return;
1278         }
1279
1280         saveSelection(cur);
1281         cur.top() = i1;
1282         InsetMath * p = i1.asInsetMath();
1283         if (i1.idx() == i2.idx()) {
1284                 i1.cell().erase(i1.pos(), i2.pos());
1285                 // We may have deleted i1.cell(cur.pos()).
1286                 // Make sure that pos is valid.
1287                 if (cur.pos() > cur.lastpos())
1288                         cur.pos() = cur.lastpos();
1289         } else if (p->nrows() > 0 && p->ncols() > 0) {
1290                 // This is a grid, delete a nice square region
1291                 Inset::row_type r1, r2;
1292                 Inset::col_type c1, c2;
1293                 region(i1, i2, r1, r2, c1, c2);
1294                 for (Inset::row_type row = r1; row <= r2; ++row)
1295                         for (Inset::col_type col = c1; col <= c2; ++col)
1296                                 p->cell(p->index(row, col)).clear();
1297                 // We've deleted the whole cell. Only pos 0 is valid.
1298                 cur.pos() = 0;
1299         } else {
1300                 Inset::idx_type idx1 = i1.idx();
1301                 Inset::idx_type idx2 = i2.idx();
1302                 if (idx1 > idx2)
1303                         swap(idx1, idx2);
1304                 for (Inset::idx_type idx = idx1 ; idx <= idx2; ++idx)
1305                         p->cell(idx).clear();
1306                 // We've deleted the whole cell. Only pos 0 is valid.
1307                 cur.pos() = 0;
1308         }
1309
1310         // need a valid cursor. (Lgb)
1311         cur.clearSelection();
1312         //lyxerr << "cap::eraseSelection end: " << cur << endl;
1313 }
1314
1315
1316 void selDel(Cursor & cur)
1317 {
1318         //lyxerr << "cap::selDel" << endl;
1319         if (cur.selection())
1320                 eraseSelection(cur);
1321 }
1322
1323
1324 void selClearOrDel(Cursor & cur)
1325 {
1326         //lyxerr << "cap::selClearOrDel" << endl;
1327         if (lyxrc.auto_region_delete)
1328                 selDel(cur);
1329         else
1330                 cur.selection(false);
1331 }
1332
1333
1334 docstring grabSelection(Cursor const & cur)
1335 {
1336         if (!cur.selection())
1337                 return docstring();
1338
1339 #if 0
1340         // grab selection by glueing multiple cells together. This is not what
1341         // we want because selections spanning multiple cells will get "&" and "\\"
1342         // seperators.
1343         ostringstream os;
1344         for (DocIterator dit = cur.selectionBegin();
1345              dit != cur.selectionEnd(); dit.forwardPos())
1346                 os << asString(dit.cell());
1347         return os.str();
1348 #endif
1349
1350         CursorSlice i1 = cur.selBegin();
1351         CursorSlice i2 = cur.selEnd();
1352
1353         if (i1.idx() == i2.idx()) {
1354                 if (i1.inset().asInsetMath()) {
1355                         MathData::const_iterator it = i1.cell().begin();
1356                         Buffer * buf = cur.buffer();
1357                         return asString(MathData(buf, it + i1.pos(), it + i2.pos()));
1358                 } else {
1359                         return from_ascii("unknown selection 1");
1360                 }
1361         }
1362
1363         Inset::row_type r1, r2;
1364         Inset::col_type c1, c2;
1365         region(i1, i2, r1, r2, c1, c2);
1366
1367         docstring data;
1368         if (i1.inset().asInsetMath()) {
1369                 for (Inset::row_type row = r1; row <= r2; ++row) {
1370                         if (row > r1)
1371                                 data += "\\\\";
1372                         for (Inset::col_type col = c1; col <= c2; ++col) {
1373                                 if (col > c1)
1374                                         data += '&';
1375                                 data += asString(i1.asInsetMath()->
1376                                         cell(i1.asInsetMath()->index(row, col)));
1377                         }
1378                 }
1379         } else {
1380                 data = from_ascii("unknown selection 2");
1381         }
1382         return data;
1383 }
1384
1385
1386 void dirtyTabularStack(bool b)
1387 {
1388         dirty_tabular_stack_ = b;
1389 }
1390
1391
1392 bool tabularStackDirty()
1393 {
1394         return dirty_tabular_stack_;
1395 }
1396
1397
1398 } // namespace cap
1399 } // namespace lyx