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/InsetCitation.h"
  44 #include "insets/InsetCommand.h"
  45 #include "insets/InsetFlex.h"
  46 #include "insets/InsetGraphics.h"
  47 #include "insets/InsetGraphicsParams.h"
  48 #include "insets/InsetInclude.h"
  49 #include "insets/InsetLabel.h"
  50 #include "insets/InsetTabular.h"
  51
  52 #include "mathed/MathData.h"
  53 #include "mathed/InsetMath.h"
  54 #include "mathed/InsetMathHull.h"
  55 #include "mathed/InsetMathRef.h"
  56 #include "mathed/MathSupport.h"
  57
  58 #include "support/debug.h"
  59 #include "support/docstream.h"
  60 #include "support/gettext.h"
  61 #include "support/lassert.h"
  62 #include "support/limited_stack.h"
  63 #include "support/lstrings.h"
  64 #include "support/lyxalgo.h"
  65 #include "support/TempFile.h"
  66 #include "support/unique_ptr.h"
  67
  68 #include "frontends/alert.h"
  69 #include "frontends/Clipboard.h"
  70 #include "frontends/Selection.h"
  71
  72 #include <string>
  73 #include <tuple>
  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 // temporary scratch area
  91 CutStack tempCut(1);
  92
  93 // store whether the tabular stack is newer than the normal copy stack
  94 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  95 // when we (hopefully) have a one-for-all paste mechanism.
  96 bool dirty_tabular_stack_ = false;
  97
  98
  99 bool checkPastePossible(int index)
 100 {
 101         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 102 }
 103
 104
 105 struct PasteReturnValue {
 106         PasteReturnValue(pit_type r_pit, pos_type r_pos, bool r_nu) :
 107           pit(r_pit), pos(r_pos), needupdate(r_nu)
 108         {}
 109
 110         pit_type pit;
 111         pos_type pos;
 112         bool needupdate;
 113 };
 114
 115 PasteReturnValue
 116 pasteSelectionHelper(DocIterator const & cur, ParagraphList const & parlist,
 117                      DocumentClassConstPtr oldDocClass, cap::BranchAction branchAction,
 118                      ErrorList & errorlist)
 119 {
 120         Buffer const & buffer = *cur.buffer();
 121         pit_type pit = cur.pit();
 122         pos_type pos = cur.pos();
 123         bool need_update = false;
 124
 125         if (parlist.empty())
 126                 return PasteReturnValue(pit, pos, need_update);
 127
 128         // Check whether we paste into an inset that does not
 129         // produce output (needed for label duplicate check)
 130         bool in_active_inset = cur.paragraph().inInset().producesOutput();
 131         if (in_active_inset) {
 132                 for (size_type sl = 0 ; sl < cur.depth() ; ++sl) {
 133                         Paragraph const & outer_par = cur[sl].paragraph();
 134                         if (!outer_par.inInset().producesOutput()) {
 135                                 in_active_inset = false;
 136                                 break;
 137                         }
 138                 }
 139         }
 140
 141         InsetText * target_inset = cur.inset().asInsetText();
 142         if (!target_inset) {
 143                 InsetTabular * it = cur.inset().asInsetTabular();
 144                 target_inset = it ? it->cell(cur.idx())->asInsetText() : nullptr;
 145         }
 146         LASSERT(target_inset, return PasteReturnValue(pit, pos, need_update));
 147
 148         ParagraphList & pars = target_inset->paragraphs();
 149         LASSERT(pos <= pars[pit].size(),
 150                         return PasteReturnValue(pit, pos, need_update));
 151
 152         // Make a copy of the CaP paragraphs.
 153         ParagraphList insertion = parlist;
 154
 155         // Now remove all out of the pars which is NOT allowed in the
 156         // new environment and set also another font if that is required.
 157
 158         // Merge paragraphs that are to be pasted into a text inset
 159         // that does not allow multiple pars.
 160         InsetText * inset_text = target_inset->asInsetText();
 161         if (inset_text && !inset_text->allowMultiPar()) {
 162                 while (insertion.size() > 1)
 163                         mergeParagraph(buffer.params(), insertion, 0);
 164         }
 165
 166         // Convert newline to paragraph break in ParbreakIsNewline
 167         if (target_inset->getLayout().parbreakIsNewline()
 168             || pars[pit].layout().parbreak_is_newline) {
 169                 for (size_t i = 0; i != insertion.size(); ++i) {
 170                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 171                                 if (insertion[i].isNewline(j)) {
 172                                         // do not track deletion of newline
 173                                         insertion[i].eraseChar(j, false);
 174                                         insertion[i].setInsetOwner(target_inset);
 175                                         breakParagraphConservative(
 176                                                         buffer.params(),
 177                                                         insertion, i, j);
 178                                         break;
 179                                 }
 180                         }
 181                 }
 182         }
 183
 184         // Prevent to paste uncodable characters in verbatim and ERT.
 185         // The encoding is inherited from the context here.
 186         docstring uncodable_content;
 187         if (target_inset->getLayout().isPassThru() && cur.getEncoding()) {
 188                 odocstringstream res;
 189                 Encoding const * e = cur.getEncoding();
 190                 for (size_t i = 0; i != insertion.size(); ++i) {
 191                         pos_type end = insertion[i].size();
 192                         for (pos_type j = 0; j != end; ++j) {
 193                                 // skip insets
 194                                 if (insertion[i].isInset(j))
 195                                         continue;
 196                                 char_type const c = insertion[i].getChar(j);
 197                                 if (!e->encodable(c)) {
 198                                         // do not track deletion
 199                                         res.put(c);
 200                                         insertion[i].eraseChar(j, false);
 201                                         --end;
 202                                         --j;
 203                                 }
 204                         }
 205                 }
 206                 docstring const uncodable = res.str();
 207                 if (!uncodable.empty()) {
 208                         if (uncodable.size() == 1)
 209                                 uncodable_content = bformat(_("The character \"%1$s\" is uncodable in this verbatim context "
 210                                                       "and thus has not been pasted."),
 211                                                     uncodable);
 212                         else
 213                                 uncodable_content = bformat(_("The characters \"%1$s\" are uncodable in this verbatim context "
 214                                                       "and thus have not been pasted."),
 215                                                     uncodable);
 216                 }
 217         }
 218
 219         // set the paragraphs to plain layout if necessary
 220         DocumentClassConstPtr newDocClass = buffer.params().documentClassPtr();
 221         if (cur.inset().usePlainLayout()) {
 222                 bool forcePlainLayout = target_inset->forcePlainLayout();
 223                 Layout const & plainLayout = newDocClass->plainLayout();
 224                 Layout const & defaultLayout = newDocClass->defaultLayout();
 225                 ParagraphList::iterator const end = insertion.end();
 226                 ParagraphList::iterator par = insertion.begin();
 227                 for (; par != end; ++par) {
 228                         Layout const & parLayout = par->layout();
 229                         if (forcePlainLayout || parLayout == defaultLayout)
 230                                 par->setLayout(plainLayout);
 231                 }
 232         } else {
 233                 // check if we need to reset from plain layout
 234                 Layout const & defaultLayout = newDocClass->defaultLayout();
 235                 Layout const & plainLayout = newDocClass->plainLayout();
 236                 ParagraphList::iterator const end = insertion.end();
 237                 ParagraphList::iterator par = insertion.begin();
 238                 for (; par != end; ++par) {
 239                         Layout const & parLayout = par->layout();
 240                         if (parLayout == plainLayout)
 241                                 par->setLayout(defaultLayout);
 242                 }
 243         }
 244
 245         InsetText in(cur.buffer());
 246         // Make sure there is no class difference.
 247         in.paragraphs().clear();
 248         // This works without copying any paragraph data because we have
 249         // a specialized swap method for ParagraphList. This is important
 250         // since we store pointers to insets at some places and we don't
 251         // want to invalidate them.
 252         insertion.swap(in.paragraphs());
 253         cap::switchBetweenClasses(oldDocClass, newDocClass, in, errorlist);
 254         // Do this here since switchBetweenClasses clears the errorlist
 255         if (!uncodable_content.empty())
 256                 errorlist.push_back(ErrorItem(_("Uncodable content"), uncodable_content));
 257         insertion.swap(in.paragraphs());
 258
 259         ParagraphList::iterator tmpbuf = insertion.begin();
 260         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 261
 262         depth_type max_depth = pars[pit].getMaxDepthAfter();
 263
 264         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 265                 // If we have a negative jump so that the depth would
 266                 // go below 0 depth then we have to redo the delta to
 267                 // this new max depth level so that subsequent
 268                 // paragraphs are aligned correctly to this paragraph
 269                 // at level 0.
 270                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 271                         depth_delta = 0;
 272
 273                 // Set the right depth so that we are not too deep or shallow.
 274                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 275                 if (tmpbuf->params().depth() > max_depth)
 276                         tmpbuf->params().depth(max_depth);
 277
 278                 // Set max_depth for the next paragraph
 279                 max_depth = tmpbuf->getMaxDepthAfter();
 280
 281                 // Set the inset owner of this paragraph.
 282                 tmpbuf->setInsetOwner(target_inset);
 283                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 284                         // do not track deletion of invalid insets
 285                         if (Inset * inset = tmpbuf->getInset(i))
 286                                 if (!target_inset->insetAllowed(inset->lyxCode()))
 287                                         tmpbuf->eraseChar(i--, false);
 288                 }
 289
 290                 if (lyxrc.ct_markup_copied)
 291                         tmpbuf->setChange(Change(buffer.params().track_changes ?
 292                                                  Change::INSERTED : Change::UNCHANGED));
 293         }
 294
 295         bool const empty = pars[pit].empty();
 296         if (!empty) {
 297                 // Make the buf exactly the same layout as the cursor
 298                 // paragraph.
 299                 insertion.begin()->makeSameLayout(pars[pit]);
 300         }
 301
 302         // Prepare the paragraphs and insets for insertion.
 303         insertion.swap(in.paragraphs());
 304
 305         InsetIterator const i_end = inset_iterator_end(in);
 306         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 307                 // Even though this will also be done later, it has to be done here
 308                 // since some inset might try to access the buffer() member.
 309                 it->setBuffer(const_cast<Buffer &>(buffer));
 310                 switch (it->lyxCode()) {
 311
 312                 case MATH_HULL_CODE: {
 313                         // check for equation labels and resolve duplicates
 314                         InsetMathHull * ins = it->asInsetMath()->asHullInset();
 315                         std::vector<InsetLabel *> labels = ins->getLabels();
 316                         for (size_t i = 0; i != labels.size(); ++i) {
 317                                 if (!labels[i])
 318                                         continue;
 319                                 InsetLabel * lab = labels[i];
 320                                 docstring const oldname = lab->getParam("name");
 321                                 lab->updateLabel(oldname, in_active_inset);
 322                                 // We need to update the buffer reference cache.
 323                                 need_update = true;
 324                                 docstring const newname = lab->getParam("name");
 325                                 if (oldname == newname)
 326                                         continue;
 327                                 // adapt the references
 328                                 for (InsetIterator itt = inset_iterator_begin(in);
 329                                       itt != i_end; ++itt) {
 330                                         if (itt->lyxCode() == REF_CODE) {
 331                                                 InsetCommand * ref = itt->asInsetCommand();
 332                                                 if (ref->getParam("reference") == oldname)
 333                                                         ref->setParam("reference", newname);
 334                                         } else if (itt->lyxCode() == MATH_REF_CODE) {
 335                                                 InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 336                                                 // this is necessary to prevent an uninitialized
 337                                                 // buffer when the RefInset is in a MathBox.
 338                                                 // FIXME audit setBuffer calls
 339                                                 mi->setBuffer(const_cast<Buffer &>(buffer));
 340                                                 if (mi->getTarget() == oldname)
 341                                                         mi->changeTarget(newname);
 342                                         }
 343                                 }
 344                         }
 345                         break;
 346                 }
 347
 348                 case LABEL_CODE: {
 349                         // check for duplicates
 350                         InsetLabel & lab = static_cast<InsetLabel &>(*it);
 351                         docstring const oldname = lab.getParam("name");
 352                         lab.updateLabel(oldname, in_active_inset);
 353                         // We need to update the buffer reference cache.
 354                         need_update = true;
 355                         docstring const newname = lab.getParam("name");
 356                         if (oldname == newname)
 357                                 break;
 358                         // adapt the references
 359                         for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 360                                 if (itt->lyxCode() == REF_CODE) {
 361                                         InsetCommand & ref = static_cast<InsetCommand &>(*itt);
 362                                         if (ref.getParam("reference") == oldname)
 363                                                 ref.setParam("reference", newname);
 364                                 } else if (itt->lyxCode() == MATH_REF_CODE) {
 365                                         InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 366                                         // this is necessary to prevent an uninitialized
 367                                         // buffer when the RefInset is in a MathBox.
 368                                         // FIXME audit setBuffer calls
 369                                         mi->setBuffer(const_cast<Buffer &>(buffer));
 370                                         if (mi->getTarget() == oldname)
 371                                                 mi->changeTarget(newname);
 372                                 }
 373                         }
 374                         break;
 375                 }
 376
 377                 case INCLUDE_CODE: {
 378                         InsetInclude & inc = static_cast<InsetInclude &>(*it);
 379                         inc.updateCommand();
 380                         // We need to update the list of included files.
 381                         need_update = true;
 382                         break;
 383                 }
 384
 385                 case CITE_CODE: {
 386                         InsetCitation & cit = static_cast<InsetCitation &>(*it);
 387                         // This actually only needs to be done if the cite engine
 388                         // differs, but we do it in general.
 389                         cit.redoLabel();
 390                         // We need to update the list of citations.
 391                         need_update = true;
 392                         break;
 393                 }
 394
 395                 case BIBITEM_CODE: {
 396                         // check for duplicates
 397                         InsetBibitem & bib = static_cast<InsetBibitem &>(*it);
 398                         docstring const oldkey = bib.getParam("key");
 399                         bib.updateCommand(oldkey, false);
 400                         // We need to update the buffer reference cache.
 401                         need_update = true;
 402                         docstring const newkey = bib.getParam("key");
 403                         if (oldkey == newkey)
 404                                 break;
 405                         // adapt the references
 406                         for (InsetIterator itt = inset_iterator_begin(in);
 407                              itt != i_end; ++itt) {
 408                                 if (itt->lyxCode() == CITE_CODE) {
 409                                         InsetCommand * ref = itt->asInsetCommand();
 410                                         if (ref->getParam("key") == oldkey)
 411                                                 ref->setParam("key", newkey);
 412                                 }
 413                         }
 414                         break;
 415                 }
 416
 417                 case BRANCH_CODE: {
 418                         // check if branch is known to target buffer
 419                         // or its master
 420                         InsetBranch & br = static_cast<InsetBranch &>(*it);
 421                         docstring const name = br.branch();
 422                         if (name.empty())
 423                                 break;
 424                         bool const is_child = (&buffer != buffer.masterBuffer());
 425                         BranchList branchlist = buffer.params().branchlist();
 426                         if ((!is_child && branchlist.find(name))
 427                             || (is_child && (branchlist.find(name)
 428                                 || buffer.masterBuffer()->params().branchlist().find(name))))
 429                                 break;
 430                         switch(branchAction) {
 431                         case cap::BRANCH_ADD: {
 432                                 // This is for a temporary buffer, so simply create the branch.
 433                                 // Must not use lyx::dispatch(), since tmpbuffer has no view.
 434                                 DispatchResult dr;
 435                                 const_cast<Buffer&>(buffer).dispatch(FuncRequest(LFUN_BRANCH_ADD, name), dr);
 436                                 break;
 437                         }
 438                         case cap::BRANCH_ASK: {
 439                                 docstring text = bformat(
 440                                         _("The pasted branch \"%1$s\" is undefined.\n"
 441                                           "Do you want to add it to the document's branch list?"),
 442                                         name);
 443                                 if (frontend::Alert::prompt(_("Unknown branch"),
 444                                           text, 0, 1, _("&Add"), _("&Don't Add")) != 0)
 445                                         break;
 446                                 lyx::dispatch(FuncRequest(LFUN_BRANCH_ADD, name));
 447                                 break;
 448                         }
 449                         case cap::BRANCH_IGNORE:
 450                                 break;
 451                         }
 452                         // We need to update the list of branches.
 453                         need_update = true;
 454                         break;
 455                 }
 456
 457                 default:
 458                         break; // nothing
 459                 }
 460         }
 461         insertion.swap(in.paragraphs());
 462
 463         // Split the paragraph for inserting the buf if necessary.
 464         if (!empty)
 465                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 466
 467         // Paste it!
 468         if (empty) {
 469                 pars.insert(lyx::next(pars.begin(), pit),
 470                             insertion.begin(),
 471                             insertion.end());
 472
 473                 // merge the empty par with the last par of the insertion
 474                 mergeParagraph(buffer.params(), pars,
 475                                pit + insertion.size() - 1);
 476         } else {
 477                 pars.insert(lyx::next(pars.begin(), pit + 1),
 478                             insertion.begin(),
 479                             insertion.end());
 480
 481                 // merge the first par of the insertion with the current par
 482                 mergeParagraph(buffer.params(), pars, pit);
 483         }
 484
 485         // Store the new cursor position.
 486         pit_type last_paste = pit + insertion.size() - 1;
 487         pit_type startpit = pit;
 488         pit = last_paste;
 489         pos = pars[last_paste].size();
 490
 491         // FIXME Should we do it here, or should we let updateBuffer() do it?
 492         // Set paragraph buffers. It's important to do this right away
 493         // before something calls Inset::buffer() and causes a crash.
 494         for (pit_type p = startpit; p <= pit; ++p)
 495                 pars[p].setInsetBuffers(const_cast<Buffer &>(buffer));
 496
 497         // Join (conditionally) last pasted paragraph with next one, i.e.,
 498         // the tail of the spliced document paragraph
 499         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 500                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 501                         mergeParagraph(buffer.params(), pars, last_paste);
 502                 } else if (pars[last_paste + 1].empty()) {
 503                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 504                         mergeParagraph(buffer.params(), pars, last_paste);
 505                 } else if (pars[last_paste].empty()) {
 506                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 507                         mergeParagraph(buffer.params(), pars, last_paste);
 508                 } else {
 509                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().track_changes);
 510                         ++last_paste;
 511                 }
 512         }
 513
 514         return PasteReturnValue(pit, pos, need_update);
 515 }
 516
 517
 518 PitPosPair eraseSelectionHelper(BufferParams const & params,
 519         ParagraphList & pars,
 520         pit_type startpit, pit_type endpit,
 521         int startpos, int endpos)
 522 {
 523         // Start of selection is really invalid.
 524         if (startpit == pit_type(pars.size()) ||
 525             (startpos > pars[startpit].size()))
 526                 return PitPosPair(endpit, endpos);
 527
 528         // Start and end is inside same paragraph
 529         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 530                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.track_changes);
 531                 return PitPosPair(endpit, endpos);
 532         }
 533
 534         for (pit_type pit = startpit; pit != endpit + 1;) {
 535                 pos_type const left  = (pit == startpit ? startpos : 0);
 536                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 537                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.track_changes);
 538
 539                 // Logically erase only, including the end-of-paragraph character
 540                 pars[pit].eraseChars(left, right, params.track_changes);
 541
 542                 // Separate handling of paragraph break:
 543                 if (merge && pit != endpit &&
 544                     (pit + 1 != endpit
 545                      || pars[pit].hasSameLayout(pars[endpit])
 546                      || pars[endpit].size() == endpos)) {
 547                         if (pit + 1 == endpit)
 548                                 endpos += pars[pit].size();
 549                         mergeParagraph(params, pars, pit);
 550                         --endpit;
 551                 } else
 552                         ++pit;
 553         }
 554
 555         // Ensure legal cursor pos:
 556         endpit = startpit;
 557         endpos = startpos;
 558         return PitPosPair(endpit, endpos);
 559 }
 560
 561
 562 Buffer * copyToTempBuffer(ParagraphList const & paragraphs, DocumentClassConstPtr docclass)
 563 {
 564         // This used to need to be static to avoid a memory leak. It no longer needs
 565         // to be so, but the alternative is to construct a new one of these (with a
 566         // new temporary directory, etc) every time, and then to destroy it. So maybe
 567         // it's worth just keeping this one around.
 568         static TempFile tempfile("clipboard.internal");
 569         tempfile.setAutoRemove(false);
 570         // The initialization of staticbuffer is thread-safe. Using a lambda
 571         // guarantees that the properties are set only once.
 572         static Buffer * staticbuffer = [&](){
 573                 Buffer * b =
 574                         theBufferList().newInternalBuffer(tempfile.name().absFileName());
 575                 b->setUnnamed(true);
 576                 b->inset().setBuffer(*b);
 577                 //initialize staticbuffer with b
 578                 return b;
 579         }();
 580         // Use a clone for the complicated stuff so that we do not need to clean
 581         // up in order to avoid a crash.
 582         Buffer * buffer = staticbuffer->cloneBufferOnly();
 583         LASSERT(buffer, return nullptr);
 584
 585         // This needs doing every time.
 586         // Since setDocumentClass() causes deletion of the old document class
 587         // we need to reset all layout pointers in paragraphs (otherwise they
 588         // would be dangling).
 589         ParIterator const end = buffer->par_iterator_end();
 590         for (ParIterator it = buffer->par_iterator_begin(); it != end; ++it) {
 591                 docstring const name = it->layout().name();
 592                 if (docclass->hasLayout(name))
 593                         it->setLayout((*docclass)[name]);
 594                 else
 595                         it->setPlainOrDefaultLayout(*docclass);
 596         }
 597         buffer->params().setDocumentClass(docclass);
 598
 599         // we will use pasteSelectionHelper to copy the paragraphs into the
 600         // temporary Buffer, since it does a lot of things to fix them up.
 601         DocIterator dit = doc_iterator_begin(buffer, &buffer->inset());
 602         ErrorList el;
 603         pasteSelectionHelper(dit, paragraphs, docclass, cap::BRANCH_ADD, el);
 604
 605         return buffer;
 606 }
 607
 608
 609 void putClipboard(ParagraphList const & paragraphs,
 610                   DocumentClassConstPtr docclass, docstring const & plaintext,
 611                   BufferParams const bp)
 612 {
 613         Buffer * buffer = copyToTempBuffer(paragraphs, docclass);
 614         if (!buffer) // already asserted in copyToTempBuffer()
 615                 return;
 616
 617         // We don't want to produce images that are not used. Therefore,
 618         // output formulas as MathML. Even if this is not understood by all
 619         // applications, the number that can parse it should go up in the future.
 620         buffer->params().html_math_output = BufferParams::MathML;
 621
 622         if (lyxrc.ct_markup_copied) {
 623                 // Copy authors to the params. We need those pointers.
 624                 for (Author const & a : bp.authors())
 625                         buffer->params().authors().record(a);
 626         }
 627
 628         // Make sure MarkAsExporting is deleted before buffer is
 629         {
 630                 // The Buffer is being used to export. This is necessary so that the
 631                 // updateMacros call will record the needed information.
 632                 MarkAsExporting mex(buffer);
 633
 634                 buffer->updateBuffer(Buffer::UpdateMaster, OutputUpdate);
 635                 buffer->updateMacros();
 636                 buffer->updateMacroInstances(OutputUpdate);
 637
 638                 // LyX's own format
 639                 string lyx;
 640                 ostringstream oslyx;
 641                 if (buffer->write(oslyx))
 642                         lyx = oslyx.str();
 643
 644                 // XHTML format
 645                 odocstringstream oshtml;
 646                 OutputParams runparams(encodings.fromLyXName("utf8"));
 647                 // We do not need to produce images, etc.
 648                 runparams.dryrun = true;
 649                 // We are not interested in errors (bug 8866)
 650                 runparams.silent = true;
 651                 buffer->writeLyXHTMLSource(oshtml, runparams, Buffer::FullSource);
 652
 653                 theClipboard().put(lyx, oshtml.str(), plaintext);
 654         }
 655
 656         // Save that memory
 657         delete buffer;
 658 }
 659
 660
 661 /// return true if the whole ParagraphList is deleted
 662 static bool isFullyDeleted(ParagraphList const & pars)
 663 {
 664         pit_type const pars_size = static_cast<pit_type>(pars.size());
 665
 666         // check all paragraphs
 667         for (pit_type pit = 0; pit < pars_size; ++pit) {
 668                 if (!pars[pit].empty())   // prevent assertion failure
 669                         if (!pars[pit].isDeleted(0, pars[pit].size()))
 670                                 return false;
 671         }
 672         return true;
 673 }
 674
 675
 676 void copySelectionHelper(Buffer const & buf, Text const & text,
 677         pit_type startpit, pit_type endpit,
 678         int start, int end, DocumentClassConstPtr dc, CutStack & cutstack)
 679 {
 680         ParagraphList const & pars = text.paragraphs();
 681
 682         // In most of these cases, we can try to recover.
 683         LASSERT(0 <= start, start = 0);
 684         LASSERT(start <= pars[startpit].size(), start = pars[startpit].size());
 685         LASSERT(0 <= end, end = 0);
 686         LASSERT(end <= pars[endpit].size(), end = pars[endpit].size());
 687         LASSERT(startpit != endpit || start <= end, return);
 688
 689         // Clone the paragraphs within the selection.
 690         ParagraphList copy_pars(lyx::next(pars.begin(), startpit),
 691                                 lyx::next(pars.begin(), endpit + 1));
 692
 693         // Remove the end of the last paragraph; afterwards, remove the
 694         // beginning of the first paragraph. Keep this order - there may only
 695         // be one paragraph!  Do not track deletions here; this is an internal
 696         // action not visible to the user
 697
 698         Paragraph & back = copy_pars.back();
 699         back.eraseChars(end, back.size(), false);
 700         Paragraph & front = copy_pars.front();
 701         front.eraseChars(0, start, false);
 702
 703         ParagraphList::iterator it = copy_pars.begin();
 704         ParagraphList::iterator it_end = copy_pars.end();
 705
 706         for (; it != it_end; ++it) {
 707                 // Since we have a copy of the paragraphs, the insets
 708                 // do not have a proper buffer reference. It makes
 709                 // sense to add them temporarily, because the
 710                 // operations below depend on that (acceptChanges included).
 711                 it->setInsetBuffers(const_cast<Buffer &>(buf));
 712                 // PassThru paragraphs have the Language
 713                 // latex_language. This is invalid for others, so we
 714                 // need to change it to the buffer language.
 715                 if (it->isPassThru())
 716                         it->changeLanguage(buf.params(),
 717                                            latex_language, buf.language());
 718         }
 719
 720         // do not copy text (also nested in insets) which is marked as
 721         // deleted, unless the whole selection was deleted
 722         if (!lyxrc.ct_markup_copied) {
 723                 if (!isFullyDeleted(copy_pars))
 724                         acceptChanges(copy_pars, buf.params());
 725                 else
 726                         rejectChanges(copy_pars, buf.params());
 727         }
 728
 729
 730         // do some final cleanup now, to make sure that the paragraphs
 731         // are not linked to something else.
 732         it = copy_pars.begin();
 733         for (; it != it_end; ++it) {
 734                 it->resetBuffer();
 735                 it->setInsetOwner(nullptr);
 736         }
 737
 738         cutstack.push(make_pair(copy_pars, dc));
 739 }
 740
 741 } // namespace
 742
 743
 744 namespace cap {
 745
 746 void region(CursorSlice const & i1, CursorSlice const & i2,
 747             Inset::row_type & r1, Inset::row_type & r2,
 748             Inset::col_type & c1, Inset::col_type & c2)
 749 {
 750         Inset & p = i1.inset();
 751         c1 = p.col(i1.idx());
 752         c2 = p.col(i2.idx());
 753         if (c1 > c2)
 754                 swap(c1, c2);
 755         r1 = p.row(i1.idx());
 756         r2 = p.row(i2.idx());
 757         if (r1 > r2)
 758                 swap(r1, r2);
 759 }
 760
 761
 762 docstring grabAndEraseSelection(Cursor & cur)
 763 {
 764         if (!cur.selection())
 765                 return docstring();
 766         docstring res = grabSelection(cur);
 767         eraseSelection(cur);
 768         return res;
 769 }
 770
 771
 772 bool reduceSelectionToOneCell(CursorData & cur)
 773 {
 774         if (!cur.selection() || !cur.inMathed())
 775                 return false;
 776
 777         CursorSlice i1 = cur.selBegin();
 778         CursorSlice i2 = cur.selEnd();
 779         if (!i1.inset().asInsetMath())
 780                 return false;
 781
 782         // the easy case: do nothing if only one cell is selected
 783         if (i1.idx() == i2.idx())
 784                 return true;
 785
 786         cur.top().pos() = 0;
 787         cur.resetAnchor();
 788         cur.top().pos() = cur.top().lastpos();
 789
 790         return true;
 791 }
 792
 793
 794 bool multipleCellsSelected(CursorData const & cur)
 795 {
 796         if (!cur.selection() || !cur.inMathed())
 797                 return false;
 798
 799         CursorSlice i1 = cur.selBegin();
 800         CursorSlice i2 = cur.selEnd();
 801         if (!i1.inset().asInsetMath())
 802                 return false;
 803
 804         if (i1.idx() == i2.idx())
 805                 return false;
 806
 807         return true;
 808 }
 809
 810
 811 void switchBetweenClasses(DocumentClassConstPtr oldone,
 812                 DocumentClassConstPtr newone, InsetText & in, ErrorList & errorlist)
 813 {
 814         errorlist.clear();
 815
 816         LBUFERR(!in.paragraphs().empty());
 817         if (oldone == newone)
 818                 return;
 819
 820         DocumentClass const & oldtc = *oldone;
 821         DocumentClass const & newtc = *newone;
 822
 823         // layouts
 824         ParIterator it = par_iterator_begin(in);
 825         ParIterator end = par_iterator_end(in);
 826         // for remembering which layouts we've had to add
 827         set<docstring> newlayouts;
 828         for (; it != end; ++it) {
 829                 docstring const name = it->layout().name();
 830
 831                 // the pasted text will keep their own layout name. If this layout does
 832                 // not exist in the new document, it will behave like a standard layout.
 833                 bool const added_one = newtc.addLayoutIfNeeded(name);
 834                 if (added_one)
 835                         newlayouts.insert(name);
 836
 837                 if (added_one || newlayouts.find(name) != newlayouts.end()) {
 838                         // Warn the user.
 839                         docstring const s = bformat(_("Layout `%1$s' was not found."), name);
 840                         errorlist.push_back(ErrorItem(_("Layout Not Found"), s,
 841                                                       {it->id(), 0}, {it->id(), -1}));
 842                 }
 843
 844                 if (in.usePlainLayout())
 845                         it->setLayout(newtc.plainLayout());
 846                 else
 847                         it->setLayout(newtc[name]);
 848         }
 849
 850         // character styles and hidden table cells
 851         InsetIterator const i_end = inset_iterator_end(in);
 852         for (InsetIterator iit = inset_iterator_begin(in); iit != i_end; ++iit) {
 853                 InsetCode const code = iit->lyxCode();
 854                 if (code == FLEX_CODE) {
 855                         // FIXME: Should we verify all InsetCollapsible?
 856                         docstring const layoutName = iit->layoutName();
 857                         docstring const & n = newone->insetLayout(layoutName).name();
 858                         bool const is_undefined = n.empty() ||
 859                                 n == DocumentClass::plainInsetLayout().name();
 860                         if (!is_undefined)
 861                                 continue;
 862
 863                         // The flex inset is undefined in newtc
 864                         docstring const oldname = from_utf8(oldtc.name());
 865                         docstring const newname = from_utf8(newtc.name());
 866                         docstring s;
 867                         if (oldname == newname)
 868                                 s = bformat(_("Flex inset %1$s is undefined after "
 869                                         "reloading `%2$s' layout."), layoutName, oldname);
 870                         else
 871                                 s = bformat(_("Flex inset %1$s is undefined because of "
 872                                         "conversion from `%2$s' layout to `%3$s'."),
 873                                         layoutName, oldname, newname);
 874                         // To warn the user that something had to be done.
 875                         errorlist.push_back(ErrorItem(
 876                                                       _("Undefined flex inset"), s,
 877                                                       {iit.paragraph().id(), iit.pos()},
 878                                                       {iit.paragraph().id(), iit.pos() + 1}));
 879                 } else if (code == TABULAR_CODE) {
 880                         // The recursion above does not catch paragraphs in "hidden" cells,
 881                         // i.e., ones that are part of a multirow or multicolum. So we need
 882                         // to handle those separately.
 883                         // This is the cause of bug #9049.
 884                         InsetTabular * table = iit->asInsetTabular();
 885                         table->setLayoutForHiddenCells(newtc);
 886                 }
 887         }
 888 }
 889
 890
 891 vector<docstring> availableSelections(Buffer const * buf)
 892 {
 893         vector<docstring> selList;
 894         if (!buf)
 895                 return selList;
 896
 897         CutStack::const_iterator cit = theCuts.begin();
 898         CutStack::const_iterator end = theCuts.end();
 899         for (; cit != end; ++cit) {
 900                 // we do not use cit-> here because gcc 2.9x does not
 901                 // like it (JMarc)
 902                 ParagraphList const & pars = (*cit).first;
 903                 docstring textSel;
 904                 ParagraphList::const_iterator pit = pars.begin();
 905                 ParagraphList::const_iterator pend = pars.end();
 906                 for (; pit != pend; ++pit) {
 907                         Paragraph par(*pit, 0, 46);
 908                         // adapt paragraph to current buffer.
 909                         par.setInsetBuffers(const_cast<Buffer &>(*buf));
 910                         textSel += par.asString(AS_STR_INSETS);
 911                         if (textSel.size() > 45) {
 912                                 support::truncateWithEllipsis(textSel,45);
 913                                 break;
 914                         }
 915                 }
 916                 selList.push_back(textSel);
 917         }
 918
 919         return selList;
 920 }
 921
 922
 923 size_type numberOfSelections()
 924 {
 925         return theCuts.size();
 926 }
 927
 928 namespace {
 929
 930 void cutSelectionHelper(Cursor & cur, CutStack & cuts, bool realcut, bool putclip)
 931 {
 932         // This doesn't make sense, if there is no selection
 933         if (!cur.selection())
 934                 return;
 935
 936         // OK, we have a selection. This is always between cur.selBegin()
 937         // and cur.selEnd()
 938
 939         if (cur.inTexted()) {
 940                 Text * text = cur.text();
 941                 LBUFERR(text);
 942
 943                 saveSelection(cur);
 944
 945                 // make sure that the depth behind the selection are restored, too
 946                 cur.recordUndoSelection();
 947                 pit_type begpit = cur.selBegin().pit();
 948                 pit_type endpit = cur.selEnd().pit();
 949
 950                 int endpos = cur.selEnd().pos();
 951
 952                 BufferParams const & bp = cur.buffer()->params();
 953                 if (realcut) {
 954                         copySelectionHelper(*cur.buffer(),
 955                                 *text,
 956                                 begpit, endpit,
 957                                 cur.selBegin().pos(), endpos,
 958                                 bp.documentClassPtr(), cuts);
 959                         // Stuff what we got on the clipboard.
 960                         // Even if there is no selection.
 961                         if (putclip)
 962                                 putClipboard(cuts[0].first, cuts[0].second,
 963                                              cur.selectionAsString(true, true), bp);
 964                 }
 965
 966                 if (begpit != endpit)
 967                         cur.screenUpdateFlags(Update::Force | Update::FitCursor);
 968
 969                 tie(endpit, endpos) =
 970                         eraseSelectionHelper(bp, text->paragraphs(), begpit, endpit,
 971                                              cur.selBegin().pos(), endpos);
 972
 973                 // cutSelection can invalidate the cursor so we need to set
 974                 // it anew. (Lgb)
 975                 // we prefer the end for when tracking changes
 976                 cur.pos() = endpos;
 977                 cur.pit() = endpit;
 978
 979                 // need a valid cursor. (Lgb)
 980                 cur.clearSelection();
 981
 982                 // After a cut operation, we must make sure that the Buffer is updated
 983                 // because some further operation might need updated label information for
 984                 // example. So we cannot just use "cur.forceBufferUpdate()" here.
 985                 // This fixes #7071.
 986                 cur.buffer()->updateBuffer();
 987
 988                 // tell tabular that a recent copy happened
 989                 dirtyTabularStack(false);
 990         }
 991
 992         if (cur.inMathed()) {
 993                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 994                         // The current selection spans more than one cell.
 995                         // Record all cells
 996                         cur.recordUndoInset();
 997                 } else {
 998                         // Record only the current cell to avoid a jumping
 999                         // cursor after undo
1000                         cur.recordUndo();
1001                 }
1002                 if (realcut)
1003                         copySelection(cur);
1004                 eraseSelection(cur);
1005         }
1006 }
1007
1008 } // namespace
1009
1010 void cutSelection(Cursor & cur, bool realcut)
1011 {
1012         cutSelectionHelper(cur, theCuts, realcut, true);
1013 }
1014
1015
1016 void cutSelectionToTemp(Cursor & cur, bool realcut)
1017 {
1018         cutSelectionHelper(cur, tempCut, realcut, false);
1019 }
1020
1021
1022 void copySelection(Cursor const & cur)
1023 {
1024         copySelection(cur, cur.selectionAsString(true, true));
1025 }
1026
1027
1028 void copyInset(Cursor const & cur, Inset * inset, docstring const & plaintext)
1029 {
1030         ParagraphList pars;
1031         Paragraph par;
1032         BufferParams const & bp = cur.buffer()->params();
1033         par.setLayout(bp.documentClass().plainLayout());
1034         Font font(inherit_font, bp.language);
1035         par.insertInset(0, inset, font, Change(Change::UNCHANGED));
1036         pars.push_back(par);
1037         theCuts.push(make_pair(pars, bp.documentClassPtr()));
1038
1039         // stuff the selection onto the X clipboard, from an explicit copy request
1040         putClipboard(theCuts[0].first, theCuts[0].second, plaintext, bp);
1041 }
1042
1043
1044 namespace {
1045
1046 void copySelectionToStack(CursorData const & cur, CutStack & cutstack)
1047 {
1048         // this doesn't make sense, if there is no selection
1049         if (!cur.selection())
1050                 return;
1051
1052         // copySelection can not yet handle the case of cross idx selection
1053         if (cur.selBegin().idx() != cur.selEnd().idx())
1054                 return;
1055
1056         if (cur.inTexted()) {
1057                 Text * text = cur.text();
1058                 LBUFERR(text);
1059                 // ok we have a selection. This is always between cur.selBegin()
1060                 // and sel_end cursor
1061                 copySelectionHelper(*cur.buffer(), *text,
1062                                     cur.selBegin().pit(), cur.selEnd().pit(),
1063                                     cur.selBegin().pos(), cur.selEnd().pos(),
1064                                     cur.buffer()->params().documentClassPtr(),
1065                                     cutstack);
1066                 // Reset the dirty_tabular_stack_ flag only when something
1067                 // is copied to the clipboard (not to the selectionBuffer).
1068                 if (&cutstack == &theCuts)
1069                         dirtyTabularStack(false);
1070         }
1071
1072         if (cur.inMathed()) {
1073                 //lyxerr << "copySelection in mathed" << endl;
1074                 ParagraphList pars;
1075                 Paragraph par;
1076                 BufferParams const & bp = cur.buffer()->params();
1077                 // FIXME This should be the plain layout...right?
1078                 par.setLayout(bp.documentClass().plainLayout());
1079                 // For pasting into text, we set the language to the paragraph language
1080                 // (rather than the default_language which is always English; see #2596)
1081                 par.insert(0, grabSelection(cur), Font(sane_font, par.getParLanguage(bp)),
1082                            Change(Change::UNCHANGED));
1083                 pars.push_back(par);
1084                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
1085         }
1086 }
1087
1088 } // namespace
1089
1090
1091 void copySelectionToStack()
1092 {
1093         if (!selectionBuffer.empty())
1094                 theCuts.push(selectionBuffer[0]);
1095 }
1096
1097
1098 void copySelectionToTemp(Cursor & cur)
1099 {
1100         copySelectionToStack(cur, tempCut);
1101 }
1102
1103
1104 void copySelection(Cursor const & cur, docstring const & plaintext)
1105 {
1106         // In tablemode, because copy and paste actually use special table stack
1107         // we do not attempt to get selected paragraphs under cursor. Instead, a
1108         // paragraph with the plain text version is generated so that table cells
1109         // can be pasted as pure text somewhere else.
1110         if (cur.selBegin().idx() != cur.selEnd().idx()) {
1111                 ParagraphList pars;
1112                 Paragraph par;
1113                 BufferParams const & bp = cur.buffer()->params();
1114                 par.setLayout(bp.documentClass().plainLayout());
1115                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
1116                 pars.push_back(par);
1117                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
1118         } else {
1119                 copySelectionToStack(cur, theCuts);
1120         }
1121
1122         // stuff the selection onto the X clipboard, from an explicit copy request
1123         putClipboard(theCuts[0].first, theCuts[0].second, plaintext,
1124                         cur.buffer()->params());
1125 }
1126
1127
1128 void saveSelection(Cursor const & cur)
1129 {
1130         // This function is called, not when a selection is formed, but when
1131         // a selection is cleared. Therefore, multiple keyboard selection
1132         // will not repeatively trigger this function (bug 3877).
1133         if (cur.selection()
1134             && cur.selBegin() == cur.bv().cursor().selBegin()
1135             && cur.selEnd() == cur.bv().cursor().selEnd()) {
1136                 LYXERR(Debug::SELECTION, "saveSelection: '" << cur.selectionAsString(true, true) << "'");
1137                 copySelectionToStack(cur, selectionBuffer);
1138         }
1139 }
1140
1141
1142 bool selection()
1143 {
1144         return !selectionBuffer.empty();
1145 }
1146
1147
1148 void clearSelection()
1149 {
1150         selectionBuffer.clear();
1151 }
1152
1153
1154 void clearCutStack()
1155 {
1156         theCuts.clear();
1157         tempCut.clear();
1158 }
1159
1160
1161 docstring selection(size_t sel_index, DocumentClassConstPtr docclass)
1162 {
1163         if (sel_index >= theCuts.size())
1164                 return docstring();
1165
1166         unique_ptr<Buffer> buffer(copyToTempBuffer(theCuts[sel_index].first,
1167                                                    docclass));
1168         if (!buffer)
1169                 return docstring();
1170
1171         return buffer->paragraphs().back().asString(AS_STR_INSETS | AS_STR_NEWLINES);
1172 }
1173
1174
1175 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
1176                         DocumentClassConstPtr docclass, ErrorList & errorList,
1177                         cap::BranchAction branchAction)
1178 {
1179         if (cur.inTexted()) {
1180                 Text * text = cur.text();
1181                 LBUFERR(text);
1182
1183                 PasteReturnValue prv =
1184                         pasteSelectionHelper(cur, parlist, docclass, branchAction, errorList);
1185                 cur.forceBufferUpdate();
1186                 cur.clearSelection();
1187                 text->setCursor(cur, prv.pit, prv.pos);
1188         }
1189
1190         // mathed is handled in InsetMathNest/InsetMathGrid
1191         LATTEST(!cur.inMathed());
1192 }
1193
1194
1195 bool pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
1196 {
1197         // this does not make sense, if there is nothing to paste
1198         if (!checkPastePossible(sel_index))
1199                 return false;
1200
1201         cur.recordUndo();
1202         pasteParagraphList(cur, theCuts[sel_index].first,
1203                            theCuts[sel_index].second, errorList, BRANCH_ASK);
1204         return true;
1205 }
1206
1207
1208 bool pasteFromTemp(Cursor & cur, ErrorList & errorList)
1209 {
1210         // this does not make sense, if there is nothing to paste
1211         if (tempCut.empty() || tempCut[0].first.empty())
1212                 return false;
1213
1214         cur.recordUndo();
1215         pasteParagraphList(cur, tempCut[0].first,
1216                            tempCut[0].second, errorList, BRANCH_IGNORE);
1217         return true;
1218 }
1219
1220
1221 bool pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs,
1222                         Clipboard::TextType type)
1223 {
1224         // Use internal clipboard if it is the most recent one
1225         // This overrides asParagraphs and type on purpose!
1226         if (theClipboard().isInternal())
1227                 return pasteFromStack(cur, errorList, 0);
1228
1229         // First try LyX format
1230         if ((type == Clipboard::LyXTextType ||
1231              type == Clipboard::LyXOrPlainTextType ||
1232              type == Clipboard::AnyTextType) &&
1233             theClipboard().hasTextContents(Clipboard::LyXTextType)) {
1234                 string lyx = theClipboard().getAsLyX();
1235                 if (!lyx.empty()) {
1236                         // For some strange reason gcc 3.2 and 3.3 do not accept
1237                         // Buffer buffer(string(), false);
1238                         Buffer buffer("", false);
1239                         buffer.setUnnamed(true);
1240                         if (buffer.readString(lyx)) {
1241                                 cur.recordUndo();
1242                                 pasteParagraphList(cur, buffer.paragraphs(),
1243                                         buffer.params().documentClassPtr(), errorList);
1244                                 return true;
1245                         }
1246                 }
1247         }
1248
1249         // Then try TeX and HTML
1250         Clipboard::TextType types[2] = {Clipboard::HtmlTextType, Clipboard::LaTeXTextType};
1251         string names[2] = {"html", "latexclipboard"};
1252         for (int i = 0; i < 2; ++i) {
1253                 if (type != types[i] && type != Clipboard::AnyTextType)
1254                         continue;
1255                 bool available = theClipboard().hasTextContents(types[i]);
1256
1257                 // If a specific type was explicitly requested, try to
1258                 // interpret plain text: The user told us that the clipboard
1259                 // contents is in the desired format
1260                 if (!available && type == types[i]) {
1261                         types[i] = Clipboard::PlainTextType;
1262                         available = theClipboard().hasTextContents(types[i]);
1263                 }
1264
1265                 if (available) {
1266                         docstring text = theClipboard().getAsText(types[i]);
1267                         available = !text.empty();
1268                         if (available) {
1269                                 // For some strange reason gcc 3.2 and 3.3 do not accept
1270                                 // Buffer buffer(string(), false);
1271                                 Buffer buffer("", false);
1272                                 buffer.setUnnamed(true);
1273                                 available = buffer.importString(names[i], text, errorList);
1274                                 if (available)
1275                                         available = !buffer.paragraphs().empty();
1276                                 if (available && !buffer.paragraphs()[0].empty()) {
1277                                         // TeX2lyx (also used in the HTML chain) assumes English as document language
1278                                         // if no language is explicitly set (as is the case here).
1279                                         // We thus reset the temp buffer's language to the context language
1280                                         buffer.changeLanguage(buffer.language(), cur.getFont().language());
1281                                         cur.recordUndo();
1282                                         pasteParagraphList(cur, buffer.paragraphs(),
1283                                                 buffer.params().documentClassPtr(), errorList);
1284                                         return true;
1285                                 }
1286                         }
1287                 }
1288         }
1289
1290         // Then try plain text
1291         docstring const text = theClipboard().getAsText(Clipboard::PlainTextType);
1292         if (text.empty())
1293                 return false;
1294         cur.recordUndo();
1295         if (asParagraphs)
1296                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1297         else
1298                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1299         cur.forceBufferUpdate();
1300         return true;
1301 }
1302
1303
1304 void pasteSimpleText(Cursor & cur, bool asParagraphs)
1305 {
1306         docstring text;
1307         // Use internal clipboard if it is the most recent one
1308         if (theClipboard().isInternal()) {
1309                 if (!checkPastePossible(0))
1310                         return;
1311
1312                 ParagraphList const & pars = theCuts[0].first;
1313                 ParagraphList::const_iterator it = pars.begin();
1314                 for (; it != pars.end(); ++it) {
1315                         if (it != pars.begin())
1316                                 text += "\n";
1317                         text += (*it).asString();
1318                 }
1319                 asParagraphs = false;
1320         } else {
1321                 // Then try plain text
1322                 text = theClipboard().getAsText(Clipboard::PlainTextType);
1323         }
1324
1325         if (text.empty())
1326                 return;
1327
1328         cur.recordUndo();
1329         cutSelection(cur, false);
1330         if (asParagraphs)
1331                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1332         else
1333                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1334 }
1335
1336
1337 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
1338                             Clipboard::GraphicsType preferedType)
1339 {
1340         LASSERT(theClipboard().hasGraphicsContents(preferedType), return);
1341
1342         // get picture from clipboard
1343         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
1344         if (filename.empty())
1345                 return;
1346
1347         // create inset for graphic
1348         InsetGraphics * inset = new InsetGraphics(cur.buffer());
1349         InsetGraphicsParams params;
1350         params.filename = support::DocFileName(filename.absFileName(), false);
1351         inset->setParams(params);
1352         cur.recordUndo();
1353         cur.insert(inset);
1354 }
1355
1356
1357 void pasteSelection(Cursor & cur, ErrorList & errorList)
1358 {
1359         if (selectionBuffer.empty())
1360                 return;
1361         cur.recordUndo();
1362         pasteParagraphList(cur, selectionBuffer[0].first,
1363                            selectionBuffer[0].second, errorList);
1364 }
1365
1366
1367 void replaceSelectionWithString(Cursor & cur, docstring const & str)
1368 {
1369         cur.recordUndo();
1370         DocIterator selbeg = cur.selectionBegin();
1371
1372         // Get font setting before we cut, we need a copy here, not a bare reference.
1373         Font const font =
1374                 selbeg.paragraph().getFontSettings(cur.buffer()->params(), selbeg.pos());
1375
1376         // Insert the new string
1377         pos_type pos = cur.selEnd().pos();
1378         Paragraph & par = cur.selEnd().paragraph();
1379         docstring::const_iterator cit = str.begin();
1380         docstring::const_iterator end = str.end();
1381         for (; cit != end; ++cit, ++pos)
1382                 par.insertChar(pos, *cit, font, cur.buffer()->params().track_changes);
1383
1384         // Cut the selection
1385         cutSelection(cur, false);
1386 }
1387
1388
1389 void replaceSelection(Cursor & cur)
1390 {
1391         if (cur.selection())
1392                 cutSelection(cur, false);
1393 }
1394
1395
1396 void eraseSelection(Cursor & cur)
1397 {
1398         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
1399         CursorSlice const & i1 = cur.selBegin();
1400         CursorSlice const & i2 = cur.selEnd();
1401         if (!i1.asInsetMath()) {
1402                 LYXERR0("Can't erase this selection");
1403                 return;
1404         }
1405
1406         saveSelection(cur);
1407         cur.top() = i1;
1408         InsetMath * p = i1.asInsetMath();
1409         if (i1.idx() == i2.idx()) {
1410                 i1.cell().erase(i1.pos(), i2.pos());
1411                 // We may have deleted i1.cell(cur.pos()).
1412                 // Make sure that pos is valid.
1413                 if (cur.pos() > cur.lastpos())
1414                         cur.pos() = cur.lastpos();
1415         } else if (p->nrows() > 0 && p->ncols() > 0) {
1416                 // This is a grid, delete a nice square region
1417                 Inset::row_type r1, r2;
1418                 Inset::col_type c1, c2;
1419                 region(i1, i2, r1, r2, c1, c2);
1420                 for (Inset::row_type row = r1; row <= r2; ++row)
1421                         for (Inset::col_type col = c1; col <= c2; ++col)
1422                                 p->cell(p->index(row, col)).clear();
1423                 // We've deleted the whole cell. Only pos 0 is valid.
1424                 cur.pos() = 0;
1425         } else {
1426                 Inset::idx_type idx1 = i1.idx();
1427                 Inset::idx_type idx2 = i2.idx();
1428                 if (idx1 > idx2)
1429                         swap(idx1, idx2);
1430                 for (Inset::idx_type idx = idx1 ; idx <= idx2; ++idx)
1431                         p->cell(idx).clear();
1432                 // We've deleted the whole cell. Only pos 0 is valid.
1433                 cur.pos() = 0;
1434         }
1435
1436         // need a valid cursor. (Lgb)
1437         cur.clearSelection();
1438         //lyxerr << "cap::eraseSelection end: " << cur << endl;
1439 }
1440
1441
1442 void selDel(Cursor & cur)
1443 {
1444         //lyxerr << "cap::selDel" << endl;
1445         if (cur.selection())
1446                 eraseSelection(cur);
1447 }
1448
1449
1450 void selClearOrDel(Cursor & cur)
1451 {
1452         //lyxerr << "cap::selClearOrDel" << endl;
1453         if (lyxrc.auto_region_delete)
1454                 selDel(cur);
1455         else
1456                 cur.selection(false);
1457 }
1458
1459
1460 docstring grabSelection(CursorData const & cur)
1461 {
1462         if (!cur.selection())
1463                 return docstring();
1464
1465 #if 0
1466         // grab selection by glueing multiple cells together. This is not what
1467         // we want because selections spanning multiple cells will get "&" and "\\"
1468         // seperators.
1469         ostringstream os;
1470         for (DocIterator dit = cur.selectionBegin();
1471              dit != cur.selectionEnd(); dit.forwardPos())
1472                 os << asString(dit.cell());
1473         return os.str();
1474 #endif
1475
1476         CursorSlice i1 = cur.selBegin();
1477         CursorSlice i2 = cur.selEnd();
1478
1479         if (i1.idx() == i2.idx()) {
1480                 if (i1.inset().asInsetMath()) {
1481                         MathData::const_iterator it = i1.cell().begin();
1482                         Buffer * buf = cur.buffer();
1483                         return asString(MathData(buf, it + i1.pos(), it + i2.pos()));
1484                 } else {
1485                         return from_ascii("unknown selection 1");
1486                 }
1487         }
1488
1489         Inset::row_type r1, r2;
1490         Inset::col_type c1, c2;
1491         region(i1, i2, r1, r2, c1, c2);
1492
1493         docstring data;
1494         if (i1.inset().asInsetMath()) {
1495                 for (Inset::row_type row = r1; row <= r2; ++row) {
1496                         if (row > r1)
1497                                 data += "\\\\";
1498                         for (Inset::col_type col = c1; col <= c2; ++col) {
1499                                 if (col > c1)
1500                                         data += '&';
1501                                 data += asString(i1.asInsetMath()->
1502                                         cell(i1.asInsetMath()->index(row, col)));
1503                         }
1504                 }
1505         } else {
1506                 data = from_ascii("unknown selection 2");
1507         }
1508         return data;
1509 }
1510
1511
1512 void dirtyTabularStack(bool b)
1513 {
1514         dirty_tabular_stack_ = b;
1515 }
1516
1517
1518 bool tabularStackDirty()
1519 {
1520         return dirty_tabular_stack_;
1521 }
1522
1523
1524 } // namespace cap
1525 } // namespace lyx