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 <string>
  72 #include <tuple>
  73
  74 using namespace std;
  75 using namespace lyx::support;
  76 using lyx::frontend::Clipboard;
  77
  78 namespace lyx {
  79
  80 namespace {
  81
  82 typedef pair<pit_type, int> PitPosPair;
  83
  84 typedef limited_stack<pair<ParagraphList, DocumentClassConstPtr> > CutStack;
  85
  86 CutStack theCuts(10);
  87 // persistent selection, cleared until the next selection
  88 CutStack selectionBuffer(1);
  89 // temporary scratch area
  90 CutStack tempCut(1);
  91
  92 // store whether the tabular stack is newer than the normal copy stack
  93 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  94 // when we (hopefully) have a one-for-all paste mechanism.
  95 bool dirty_tabular_stack_ = false;
  96
  97
  98 bool checkPastePossible(int index)
  99 {
 100         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 101 }
 102
 103
 104 struct PasteReturnValue {
 105         PasteReturnValue(pit_type r_pit, pos_type r_pos, bool r_nu) :
 106           pit(r_pit), pos(r_pos), needupdate(r_nu)
 107         {}
 108
 109         pit_type pit;
 110         pos_type pos;
 111         bool needupdate;
 112 };
 113
 114 PasteReturnValue
 115 pasteSelectionHelper(DocIterator const & cur, ParagraphList const & parlist,
 116                      DocumentClassConstPtr oldDocClass, cap::BranchAction branchAction,
 117                      ErrorList & errorlist)
 118 {
 119         Buffer const & buffer = *cur.buffer();
 120         pit_type pit = cur.pit();
 121         pos_type pos = cur.pos();
 122         bool need_update = false;
 123
 124         if (parlist.empty())
 125                 return PasteReturnValue(pit, pos, need_update);
 126
 127         InsetText * target_inset = cur.inset().asInsetText();
 128         if (!target_inset) {
 129                 InsetTabular * it = cur.inset().asInsetTabular();
 130                 target_inset = it ? it->cell(cur.idx())->asInsetText() : 0;
 131         }
 132         LASSERT(target_inset, return PasteReturnValue(pit, pos, need_update));
 133
 134         ParagraphList & pars = target_inset->paragraphs();
 135         LASSERT(pos <= pars[pit].size(),
 136                         return PasteReturnValue(pit, pos, need_update));
 137
 138         // Make a copy of the CaP paragraphs.
 139         ParagraphList insertion = parlist;
 140
 141         // Now remove all out of the pars which is NOT allowed in the
 142         // new environment and set also another font if that is required.
 143
 144         // Convert newline to paragraph break in ParbreakIsNewline
 145         if (target_inset->getLayout().parbreakIsNewline()
 146             || pars[pit].layout().parbreak_is_newline) {
 147                 for (size_t i = 0; i != insertion.size(); ++i) {
 148                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 149                                 if (insertion[i].isNewline(j)) {
 150                                         // do not track deletion of newline
 151                                         insertion[i].eraseChar(j, false);
 152                                         insertion[i].setInsetOwner(target_inset);
 153                                         breakParagraphConservative(
 154                                                         buffer.params(),
 155                                                         insertion, i, j);
 156                                         break;
 157                                 }
 158                         }
 159                 }
 160         }
 161
 162         // Prevent to paste uncodable characters in verbatim and ERT.
 163         // The encoding is inherited from the context here.
 164         docstring uncodable_content;
 165         if (target_inset->getLayout().isPassThru() && cur.getEncoding()) {
 166                 odocstringstream res;
 167                 Encoding const * e = cur.getEncoding();
 168                 for (size_t i = 0; i != insertion.size(); ++i) {
 169                         pos_type end = insertion[i].size();
 170                         for (pos_type j = 0; j != end; ++j) {
 171                                 // skip insets
 172                                 if (insertion[i].isInset(j))
 173                                         continue;
 174                                 char_type const c = insertion[i].getChar(j);
 175                                 if (!e->encodable(c)) {
 176                                         // do not track deletion
 177                                         res.put(c);
 178                                         insertion[i].eraseChar(j, false);
 179                                         --end;
 180                                         --j;
 181                                 }
 182                         }
 183                 }
 184                 docstring const uncodable = res.str();
 185                 if (!uncodable.empty()) {
 186                         if (uncodable.size() == 1)
 187                                 uncodable_content = bformat(_("The character \"%1$s\" is uncodable in this verbatim context "
 188                                                       "and thus has not been pasted."),
 189                                                     uncodable);
 190                         else
 191                                 uncodable_content = bformat(_("The characters \"%1$s\" are uncodable in this verbatim context "
 192                                                       "and thus have not been pasted."),
 193                                                     uncodable);
 194                 }
 195         }
 196
 197         // set the paragraphs to plain layout if necessary
 198         DocumentClassConstPtr newDocClass = buffer.params().documentClassPtr();
 199         if (cur.inset().usePlainLayout()) {
 200                 bool forcePlainLayout = target_inset->forcePlainLayout();
 201                 Layout const & plainLayout = newDocClass->plainLayout();
 202                 Layout const & defaultLayout = newDocClass->defaultLayout();
 203                 ParagraphList::iterator const end = insertion.end();
 204                 ParagraphList::iterator par = insertion.begin();
 205                 for (; par != end; ++par) {
 206                         Layout const & parLayout = par->layout();
 207                         if (forcePlainLayout || parLayout == defaultLayout)
 208                                 par->setLayout(plainLayout);
 209                 }
 210         } else {
 211                 // check if we need to reset from plain layout
 212                 Layout const & defaultLayout = newDocClass->defaultLayout();
 213                 Layout const & plainLayout = newDocClass->plainLayout();
 214                 ParagraphList::iterator const end = insertion.end();
 215                 ParagraphList::iterator par = insertion.begin();
 216                 for (; par != end; ++par) {
 217                         Layout const & parLayout = par->layout();
 218                         if (parLayout == plainLayout)
 219                                 par->setLayout(defaultLayout);
 220                 }
 221         }
 222
 223         InsetText in(cur.buffer());
 224         // Make sure there is no class difference.
 225         in.paragraphs().clear();
 226         // This works without copying any paragraph data because we have
 227         // a specialized swap method for ParagraphList. This is important
 228         // since we store pointers to insets at some places and we don't
 229         // want to invalidate them.
 230         insertion.swap(in.paragraphs());
 231         cap::switchBetweenClasses(oldDocClass, newDocClass, in, errorlist);
 232         // Do this here since switchBetweenClasses clears the errorlist
 233         if (!uncodable_content.empty())
 234                 errorlist.push_back(ErrorItem(_("Uncodable content"), uncodable_content));
 235         insertion.swap(in.paragraphs());
 236
 237         ParagraphList::iterator tmpbuf = insertion.begin();
 238         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 239
 240         depth_type max_depth = pars[pit].getMaxDepthAfter();
 241
 242         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 243                 // If we have a negative jump so that the depth would
 244                 // go below 0 depth then we have to redo the delta to
 245                 // this new max depth level so that subsequent
 246                 // paragraphs are aligned correctly to this paragraph
 247                 // at level 0.
 248                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 249                         depth_delta = 0;
 250
 251                 // Set the right depth so that we are not too deep or shallow.
 252                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 253                 if (tmpbuf->params().depth() > max_depth)
 254                         tmpbuf->params().depth(max_depth);
 255
 256                 // Set max_depth for the next paragraph
 257                 max_depth = tmpbuf->getMaxDepthAfter();
 258
 259                 // Set the inset owner of this paragraph.
 260                 tmpbuf->setInsetOwner(target_inset);
 261                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 262                         // do not track deletion of invalid insets
 263                         if (Inset * inset = tmpbuf->getInset(i))
 264                                 if (!target_inset->insetAllowed(inset->lyxCode()))
 265                                         tmpbuf->eraseChar(i--, false);
 266                 }
 267
 268                 tmpbuf->setChange(Change(buffer.params().track_changes ?
 269                                          Change::INSERTED : Change::UNCHANGED));
 270         }
 271
 272         bool const empty = pars[pit].empty();
 273         if (!empty) {
 274                 // Make the buf exactly the same layout as the cursor
 275                 // paragraph.
 276                 insertion.begin()->makeSameLayout(pars[pit]);
 277         }
 278
 279         // Prepare the paragraphs and insets for insertion.
 280         insertion.swap(in.paragraphs());
 281
 282         InsetIterator const i_end = inset_iterator_end(in);
 283         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 284                 // Even though this will also be done later, it has to be done here
 285                 // since some inset might going to try to access
 286                 // the buffer() member.
 287                 it->setBuffer(const_cast<Buffer &>(buffer));
 288                 switch (it->lyxCode()) {
 289
 290                 case MATH_HULL_CODE: {
 291                         // check for equation labels and resolve duplicates
 292                         InsetMathHull * ins = it->asInsetMath()->asHullInset();
 293                         std::vector<InsetLabel *> labels = ins->getLabels();
 294                         for (size_t i = 0; i != labels.size(); ++i) {
 295                                 if (!labels[i])
 296                                         continue;
 297                                 InsetLabel * lab = labels[i];
 298                                 docstring const oldname = lab->getParam("name");
 299                                 lab->updateLabel(oldname);
 300                                 // We need to update the buffer reference cache.
 301                                 need_update = true;
 302                                 docstring const newname = lab->getParam("name");
 303                                 if (oldname == newname)
 304                                         continue;
 305                                 // adapt the references
 306                                 for (InsetIterator itt = inset_iterator_begin(in);
 307                                       itt != i_end; ++itt) {
 308                                         if (itt->lyxCode() == REF_CODE) {
 309                                                 InsetCommand * ref = itt->asInsetCommand();
 310                                                 if (ref->getParam("reference") == oldname)
 311                                                         ref->setParam("reference", newname);
 312                                         } else if (itt->lyxCode() == MATH_REF_CODE) {
 313                                                 InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 314                                                 // this is necessary to prevent an uninitialized
 315                                                 // buffer when the RefInset is in a MathBox.
 316                                                 // FIXME audit setBuffer calls
 317                                                 mi->setBuffer(const_cast<Buffer &>(buffer));
 318                                                 if (mi->getTarget() == oldname)
 319                                                         mi->changeTarget(newname);
 320                                         }
 321                                 }
 322                         }
 323                         break;
 324                 }
 325
 326                 case LABEL_CODE: {
 327                         // check for duplicates
 328                         InsetLabel & lab = static_cast<InsetLabel &>(*it);
 329                         docstring const oldname = lab.getParam("name");
 330                         lab.updateLabel(oldname);
 331                         // We need to update the buffer reference cache.
 332                         need_update = true;
 333                         docstring const newname = lab.getParam("name");
 334                         if (oldname == newname)
 335                                 break;
 336                         // adapt the references
 337                         for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 338                                 if (itt->lyxCode() == REF_CODE) {
 339                                         InsetCommand & ref = static_cast<InsetCommand &>(*itt);
 340                                         if (ref.getParam("reference") == oldname)
 341                                                 ref.setParam("reference", newname);
 342                                 } else if (itt->lyxCode() == MATH_REF_CODE) {
 343                                         InsetMathRef * mi = itt->asInsetMath()->asRefInset();
 344                                         // this is necessary to prevent an uninitialized
 345                                         // buffer when the RefInset is in a MathBox.
 346                                         // FIXME audit setBuffer calls
 347                                         mi->setBuffer(const_cast<Buffer &>(buffer));
 348                                         if (mi->getTarget() == oldname)
 349                                                 mi->changeTarget(newname);
 350                                 }
 351                         }
 352                         break;
 353                 }
 354
 355                 case INCLUDE_CODE: {
 356                         InsetInclude & inc = static_cast<InsetInclude &>(*it);
 357                         inc.updateCommand();
 358                         // We need to update the list of included files.
 359                         need_update = true;
 360                         break;
 361                 }
 362
 363                 case BIBITEM_CODE: {
 364                         // check for duplicates
 365                         InsetBibitem & bib = static_cast<InsetBibitem &>(*it);
 366                         docstring const oldkey = bib.getParam("key");
 367                         bib.updateCommand(oldkey, false);
 368                         // We need to update the buffer reference cache.
 369                         need_update = true;
 370                         docstring const newkey = bib.getParam("key");
 371                         if (oldkey == newkey)
 372                                 break;
 373                         // adapt the references
 374                         for (InsetIterator itt = inset_iterator_begin(in);
 375                              itt != i_end; ++itt) {
 376                                 if (itt->lyxCode() == CITE_CODE) {
 377                                         InsetCommand * ref = itt->asInsetCommand();
 378                                         if (ref->getParam("key") == oldkey)
 379                                                 ref->setParam("key", newkey);
 380                                 }
 381                         }
 382                         break;
 383                 }
 384
 385                 case BRANCH_CODE: {
 386                         // check if branch is known to target buffer
 387                         // or its master
 388                         InsetBranch & br = static_cast<InsetBranch &>(*it);
 389                         docstring const name = br.branch();
 390                         if (name.empty())
 391                                 break;
 392                         bool const is_child = (&buffer != buffer.masterBuffer());
 393                         BranchList branchlist = buffer.params().branchlist();
 394                         if ((!is_child && branchlist.find(name))
 395                             || (is_child && (branchlist.find(name)
 396                                 || buffer.masterBuffer()->params().branchlist().find(name))))
 397                                 break;
 398                         switch(branchAction) {
 399                         case cap::BRANCH_ADD: {
 400                                 // This is for a temporary buffer, so simply create the branch.
 401                                 // Must not use lyx::dispatch(), since tmpbuffer has no view.
 402                                 DispatchResult dr;
 403                                 const_cast<Buffer&>(buffer).dispatch(FuncRequest(LFUN_BRANCH_ADD, name), dr);
 404                                 break;
 405                         }
 406                         case cap::BRANCH_ASK: {
 407                                 docstring text = bformat(
 408                                         _("The pasted branch \"%1$s\" is undefined.\n"
 409                                           "Do you want to add it to the document's branch list?"),
 410                                         name);
 411                                 if (frontend::Alert::prompt(_("Unknown branch"),
 412                                           text, 0, 1, _("&Add"), _("&Don't Add")) != 0)
 413                                         break;
 414                                 lyx::dispatch(FuncRequest(LFUN_BRANCH_ADD, name));
 415                                 break;
 416                         }
 417                         case cap::BRANCH_IGNORE:
 418                                 break;
 419                         }
 420                         // We need to update the list of branches.
 421                         need_update = true;
 422                         break;
 423                 }
 424
 425                 default:
 426                         break; // nothing
 427                 }
 428         }
 429         insertion.swap(in.paragraphs());
 430
 431         // Split the paragraph for inserting the buf if necessary.
 432         if (!empty)
 433                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 434
 435         // Paste it!
 436         if (empty) {
 437                 pars.insert(lyx::next(pars.begin(), pit),
 438                             insertion.begin(),
 439                             insertion.end());
 440
 441                 // merge the empty par with the last par of the insertion
 442                 mergeParagraph(buffer.params(), pars,
 443                                pit + insertion.size() - 1);
 444         } else {
 445                 pars.insert(lyx::next(pars.begin(), pit + 1),
 446                             insertion.begin(),
 447                             insertion.end());
 448
 449                 // merge the first par of the insertion with the current par
 450                 mergeParagraph(buffer.params(), pars, pit);
 451         }
 452
 453         // Store the new cursor position.
 454         pit_type last_paste = pit + insertion.size() - 1;
 455         pit_type startpit = pit;
 456         pit = last_paste;
 457         pos = pars[last_paste].size();
 458
 459         // FIXME Should we do it here, or should we let updateBuffer() do it?
 460         // Set paragraph buffers. It's important to do this right away
 461         // before something calls Inset::buffer() and causes a crash.
 462         for (pit_type p = startpit; p <= pit; ++p)
 463                 pars[p].setBuffer(const_cast<Buffer &>(buffer));
 464
 465         // Join (conditionally) last pasted paragraph with next one, i.e.,
 466         // the tail of the spliced document paragraph
 467         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 468                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 469                         mergeParagraph(buffer.params(), pars, last_paste);
 470                 } else if (pars[last_paste + 1].empty()) {
 471                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 472                         mergeParagraph(buffer.params(), pars, last_paste);
 473                 } else if (pars[last_paste].empty()) {
 474                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 475                         mergeParagraph(buffer.params(), pars, last_paste);
 476                 } else {
 477                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().track_changes);
 478                         ++last_paste;
 479                 }
 480         }
 481
 482         return PasteReturnValue(pit, pos, need_update);
 483 }
 484
 485
 486 PitPosPair eraseSelectionHelper(BufferParams const & params,
 487         ParagraphList & pars,
 488         pit_type startpit, pit_type endpit,
 489         int startpos, int endpos)
 490 {
 491         // Start of selection is really invalid.
 492         if (startpit == pit_type(pars.size()) ||
 493             (startpos > pars[startpit].size()))
 494                 return PitPosPair(endpit, endpos);
 495
 496         // Start and end is inside same paragraph
 497         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 498                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.track_changes);
 499                 return PitPosPair(endpit, endpos);
 500         }
 501
 502         for (pit_type pit = startpit; pit != endpit + 1;) {
 503                 pos_type const left  = (pit == startpit ? startpos : 0);
 504                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 505                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.track_changes);
 506
 507                 // Logically erase only, including the end-of-paragraph character
 508                 pars[pit].eraseChars(left, right, params.track_changes);
 509
 510                 // Separate handling of paragraph break:
 511                 if (merge && pit != endpit &&
 512                     (pit + 1 != endpit
 513                      || pars[pit].hasSameLayout(pars[endpit])
 514                      || pars[endpit].size() == endpos)) {
 515                         if (pit + 1 == endpit)
 516                                 endpos += pars[pit].size();
 517                         mergeParagraph(params, pars, pit);
 518                         --endpit;
 519                 } else
 520                         ++pit;
 521         }
 522
 523         // Ensure legal cursor pos:
 524         endpit = startpit;
 525         endpos = startpos;
 526         return PitPosPair(endpit, endpos);
 527 }
 528
 529
 530 Buffer * copyToTempBuffer(ParagraphList const & paragraphs, DocumentClassConstPtr docclass)
 531 {
 532         // This used to need to be static to avoid a memory leak. It no longer needs
 533         // to be so, but the alternative is to construct a new one of these (with a
 534         // new temporary directory, etc) every time, and then to destroy it. So maybe
 535         // it's worth just keeping this one around.
 536         static TempFile tempfile("clipboard.internal");
 537         tempfile.setAutoRemove(false);
 538         // The initialization of staticbuffer is thread-safe. Using a lambda
 539         // guarantees that the properties are set only once.
 540         static Buffer * staticbuffer = [&](){
 541                 Buffer * b =
 542                         theBufferList().newInternalBuffer(tempfile.name().absFileName());
 543                 b->setUnnamed(true);
 544                 b->inset().setBuffer(*b);
 545                 //initialize staticbuffer with b
 546                 return b;
 547         }();
 548         // Use a clone for the complicated stuff so that we do not need to clean
 549         // up in order to avoid a crash.
 550         Buffer * buffer = staticbuffer->cloneBufferOnly();
 551         LASSERT(buffer, return 0);
 552
 553         // This needs doing every time.
 554         // Since setDocumentClass() causes deletion of the old document class
 555         // we need to reset all layout pointers in paragraphs (otherwise they
 556         // would be dangling).
 557         ParIterator const end = buffer->par_iterator_end();
 558         for (ParIterator it = buffer->par_iterator_begin(); it != end; ++it) {
 559                 docstring const name = it->layout().name();
 560                 if (docclass->hasLayout(name))
 561                         it->setLayout((*docclass)[name]);
 562                 else
 563                         it->setPlainOrDefaultLayout(*docclass);
 564         }
 565         buffer->params().setDocumentClass(docclass);
 566
 567         // we will use pasteSelectionHelper to copy the paragraphs into the
 568         // temporary Buffer, since it does a lot of things to fix them up.
 569         DocIterator dit = doc_iterator_begin(buffer, &buffer->inset());
 570         ErrorList el;
 571         pasteSelectionHelper(dit, paragraphs, docclass, cap::BRANCH_ADD, el);
 572
 573         return buffer;
 574 }
 575
 576
 577 void putClipboard(ParagraphList const & paragraphs,
 578         DocumentClassConstPtr docclass, docstring const & plaintext)
 579 {
 580         Buffer * buffer = copyToTempBuffer(paragraphs, docclass);
 581         if (!buffer) // already asserted in copyToTempBuffer()
 582                 return;
 583
 584         // We don't want to produce images that are not used. Therefore,
 585         // output formulas as MathML. Even if this is not understood by all
 586         // applications, the number that can parse it should go up in the future.
 587         buffer->params().html_math_output = BufferParams::MathML;
 588
 589         // Make sure MarkAsExporting is deleted before buffer is
 590         {
 591                 // The Buffer is being used to export. This is necessary so that the
 592                 // updateMacros call will record the needed information.
 593                 MarkAsExporting mex(buffer);
 594
 595                 buffer->updateBuffer(Buffer::UpdateMaster, OutputUpdate);
 596                 buffer->updateMacros();
 597                 buffer->updateMacroInstances(OutputUpdate);
 598
 599                 // LyX's own format
 600                 string lyx;
 601                 ostringstream oslyx;
 602                 if (buffer->write(oslyx))
 603                         lyx = oslyx.str();
 604
 605                 // XHTML format
 606                 odocstringstream oshtml;
 607                 OutputParams runparams(encodings.fromLyXName("utf8"));
 608                 // We do not need to produce images, etc.
 609                 runparams.dryrun = true;
 610                 // We are not interested in errors (bug 8866)
 611                 runparams.silent = true;
 612                 buffer->writeLyXHTMLSource(oshtml, runparams, Buffer::FullSource);
 613
 614                 theClipboard().put(lyx, oshtml.str(), plaintext);
 615         }
 616
 617         // Save that memory
 618         delete buffer;
 619 }
 620
 621
 622 /// return true if the whole ParagraphList is deleted
 623 static bool isFullyDeleted(ParagraphList const & pars)
 624 {
 625         pit_type const pars_size = static_cast<pit_type>(pars.size());
 626
 627         // check all paragraphs
 628         for (pit_type pit = 0; pit < pars_size; ++pit) {
 629                 if (!pars[pit].empty())   // prevent assertion failure
 630                         if (!pars[pit].isDeleted(0, pars[pit].size()))
 631                                 return false;
 632         }
 633         return true;
 634 }
 635
 636
 637 void copySelectionHelper(Buffer const & buf, Text const & text,
 638         pit_type startpit, pit_type endpit,
 639         int start, int end, DocumentClassConstPtr dc, CutStack & cutstack)
 640 {
 641         ParagraphList const & pars = text.paragraphs();
 642
 643         // In most of these cases, we can try to recover.
 644         LASSERT(0 <= start, start = 0);
 645         LASSERT(start <= pars[startpit].size(), start = pars[startpit].size());
 646         LASSERT(0 <= end, end = 0);
 647         LASSERT(end <= pars[endpit].size(), end = pars[endpit].size());
 648         LASSERT(startpit != endpit || start <= end, return);
 649
 650         // Clone the paragraphs within the selection.
 651         ParagraphList copy_pars(lyx::next(pars.begin(), startpit),
 652                                 lyx::next(pars.begin(), endpit + 1));
 653
 654         // Remove the end of the last paragraph; afterwards, remove the
 655         // beginning of the first paragraph. Keep this order - there may only
 656         // be one paragraph!  Do not track deletions here; this is an internal
 657         // action not visible to the user
 658
 659         Paragraph & back = copy_pars.back();
 660         back.eraseChars(end, back.size(), false);
 661         Paragraph & front = copy_pars.front();
 662         front.eraseChars(0, start, false);
 663
 664         ParagraphList::iterator it = copy_pars.begin();
 665         ParagraphList::iterator it_end = copy_pars.end();
 666
 667         for (; it != it_end; ++it) {
 668                 // Since we have a copy of the paragraphs, the insets
 669                 // do not have a proper buffer reference. It makes
 670                 // sense to add them temporarily, because the
 671                 // operations below depend on that (acceptChanges included).
 672                 it->setBuffer(const_cast<Buffer &>(buf));
 673                 // PassThru paragraphs have the Language
 674                 // latex_language. This is invalid for others, so we
 675                 // need to change it to the buffer language.
 676                 if (it->isPassThru())
 677                         it->changeLanguage(buf.params(),
 678                                            latex_language, buf.language());
 679         }
 680
 681         // do not copy text (also nested in insets) which is marked as
 682         // deleted, unless the whole selection was deleted
 683         if (!isFullyDeleted(copy_pars))
 684                 acceptChanges(copy_pars, buf.params());
 685         else
 686                 rejectChanges(copy_pars, buf.params());
 687
 688
 689         // do some final cleanup now, to make sure that the paragraphs
 690         // are not linked to something else.
 691         it = copy_pars.begin();
 692         for (; it != it_end; ++it) {
 693                 it->resetBuffer();
 694                 it->setInsetOwner(0);
 695         }
 696
 697         cutstack.push(make_pair(copy_pars, dc));
 698 }
 699
 700 } // namespace
 701
 702
 703 namespace cap {
 704
 705 void region(CursorSlice const & i1, CursorSlice const & i2,
 706             Inset::row_type & r1, Inset::row_type & r2,
 707             Inset::col_type & c1, Inset::col_type & c2)
 708 {
 709         Inset & p = i1.inset();
 710         c1 = p.col(i1.idx());
 711         c2 = p.col(i2.idx());
 712         if (c1 > c2)
 713                 swap(c1, c2);
 714         r1 = p.row(i1.idx());
 715         r2 = p.row(i2.idx());
 716         if (r1 > r2)
 717                 swap(r1, r2);
 718 }
 719
 720
 721 docstring grabAndEraseSelection(Cursor & cur)
 722 {
 723         if (!cur.selection())
 724                 return docstring();
 725         docstring res = grabSelection(cur);
 726         eraseSelection(cur);
 727         return res;
 728 }
 729
 730
 731 bool reduceSelectionToOneCell(Cursor & cur)
 732 {
 733         if (!cur.selection() || !cur.inMathed())
 734                 return false;
 735
 736         CursorSlice i1 = cur.selBegin();
 737         CursorSlice i2 = cur.selEnd();
 738         if (!i1.inset().asInsetMath())
 739                 return false;
 740
 741         // the easy case: do nothing if only one cell is selected
 742         if (i1.idx() == i2.idx())
 743                 return true;
 744
 745         cur.top().pos() = 0;
 746         cur.resetAnchor();
 747         cur.top().pos() = cur.top().lastpos();
 748
 749         return true;
 750 }
 751
 752
 753 bool multipleCellsSelected(Cursor const & cur)
 754 {
 755         if (!cur.selection() || !cur.inMathed())
 756                 return false;
 757
 758         CursorSlice i1 = cur.selBegin();
 759         CursorSlice i2 = cur.selEnd();
 760         if (!i1.inset().asInsetMath())
 761                 return false;
 762
 763         if (i1.idx() == i2.idx())
 764                 return false;
 765
 766         return true;
 767 }
 768
 769
 770 void switchBetweenClasses(DocumentClassConstPtr oldone,
 771                 DocumentClassConstPtr newone, InsetText & in, ErrorList & errorlist)
 772 {
 773         errorlist.clear();
 774
 775         LBUFERR(!in.paragraphs().empty());
 776         if (oldone == newone)
 777                 return;
 778
 779         DocumentClass const & oldtc = *oldone;
 780         DocumentClass const & newtc = *newone;
 781
 782         // layouts
 783         ParIterator it = par_iterator_begin(in);
 784         ParIterator end = par_iterator_end(in);
 785         // for remembering which layouts we've had to add
 786         set<docstring> newlayouts;
 787         for (; it != end; ++it) {
 788                 docstring const name = it->layout().name();
 789
 790                 // the pasted text will keep their own layout name. If this layout does
 791                 // not exist in the new document, it will behave like a standard layout.
 792                 bool const added_one = newtc.addLayoutIfNeeded(name);
 793                 if (added_one)
 794                         newlayouts.insert(name);
 795
 796                 if (added_one || newlayouts.find(name) != newlayouts.end()) {
 797                         // Warn the user.
 798                         docstring const s = bformat(_("Layout `%1$s' was not found."), name);
 799                         errorlist.push_back(ErrorItem(_("Layout Not Found"), s,
 800                                                       {it->id(), 0}, {it->id(), -1}));
 801                 }
 802
 803                 if (in.usePlainLayout())
 804                         it->setLayout(newtc.plainLayout());
 805                 else
 806                         it->setLayout(newtc[name]);
 807         }
 808
 809         // character styles and hidden table cells
 810         InsetIterator const i_end = inset_iterator_end(in);
 811         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 812                 InsetCode const code = it->lyxCode();
 813                 if (code == FLEX_CODE) {
 814                         // FIXME: Should we verify all InsetCollapsible?
 815                         docstring const layoutName = it->layoutName();
 816                         docstring const & n = newone->insetLayout(layoutName).name();
 817                         bool const is_undefined = n.empty() ||
 818                                 n == DocumentClass::plainInsetLayout().name();
 819                         if (!is_undefined)
 820                                 continue;
 821
 822                         // The flex inset is undefined in newtc
 823                         docstring const oldname = from_utf8(oldtc.name());
 824                         docstring const newname = from_utf8(newtc.name());
 825                         docstring s;
 826                         if (oldname == newname)
 827                                 s = bformat(_("Flex inset %1$s is undefined after "
 828                                         "reloading `%2$s' layout."), layoutName, oldname);
 829                         else
 830                                 s = bformat(_("Flex inset %1$s is undefined because of "
 831                                         "conversion from `%2$s' layout to `%3$s'."),
 832                                         layoutName, oldname, newname);
 833                         // To warn the user that something had to be done.
 834                         errorlist.push_back(ErrorItem(
 835                                                       _("Undefined flex inset"), s,
 836                                                       {it.paragraph().id(), it.pos()},
 837                                                       {it.paragraph().id(), it.pos()+1}));
 838                 } else if (code == TABULAR_CODE) {
 839                         // The recursion above does not catch paragraphs in "hidden" cells,
 840                         // i.e., ones that are part of a multirow or multicolum. So we need
 841                         // to handle those separately.
 842                         // This is the cause of bug #9049.
 843                         InsetTabular * table = it->asInsetTabular();
 844                         table->setLayoutForHiddenCells(newtc);
 845                 }
 846         }
 847 }
 848
 849
 850 vector<docstring> availableSelections(Buffer const * buf)
 851 {
 852         vector<docstring> selList;
 853         if (!buf)
 854                 return selList;
 855
 856         CutStack::const_iterator cit = theCuts.begin();
 857         CutStack::const_iterator end = theCuts.end();
 858         for (; cit != end; ++cit) {
 859                 // we do not use cit-> here because gcc 2.9x does not
 860                 // like it (JMarc)
 861                 ParagraphList const & pars = (*cit).first;
 862                 docstring textSel;
 863                 ParagraphList::const_iterator pit = pars.begin();
 864                 ParagraphList::const_iterator pend = pars.end();
 865                 for (; pit != pend; ++pit) {
 866                         Paragraph par(*pit, 0, 46);
 867                         // adapt paragraph to current buffer.
 868                         par.setBuffer(const_cast<Buffer &>(*buf));
 869                         textSel += par.asString(AS_STR_INSETS);
 870                         if (textSel.size() > 45) {
 871                                 support::truncateWithEllipsis(textSel,45);
 872                                 break;
 873                         }
 874                 }
 875                 selList.push_back(textSel);
 876         }
 877
 878         return selList;
 879 }
 880
 881
 882 size_type numberOfSelections()
 883 {
 884         return theCuts.size();
 885 }
 886
 887 namespace {
 888
 889 void cutSelectionHelper(Cursor & cur, CutStack & cuts, bool doclear, bool realcut, bool putclip)
 890 {
 891         // This doesn't make sense, if there is no selection
 892         if (!cur.selection())
 893                 return;
 894
 895         // OK, we have a selection. This is always between cur.selBegin()
 896         // and cur.selEnd()
 897
 898         if (cur.inTexted()) {
 899                 Text * text = cur.text();
 900                 LBUFERR(text);
 901
 902                 saveSelection(cur);
 903
 904                 // make sure that the depth behind the selection are restored, too
 905                 cur.recordUndoSelection();
 906                 pit_type begpit = cur.selBegin().pit();
 907                 pit_type endpit = cur.selEnd().pit();
 908
 909                 int endpos = cur.selEnd().pos();
 910
 911                 BufferParams const & bp = cur.buffer()->params();
 912                 if (realcut) {
 913                         copySelectionHelper(*cur.buffer(),
 914                                 *text,
 915                                 begpit, endpit,
 916                                 cur.selBegin().pos(), endpos,
 917                                 bp.documentClassPtr(), cuts);
 918                         // Stuff what we got on the clipboard.
 919                         // Even if there is no selection.
 920                         if (putclip)
 921                                 putClipboard(cuts[0].first, cuts[0].second,
 922                                              cur.selectionAsString(true));
 923                 }
 924
 925                 if (begpit != endpit)
 926                         cur.screenUpdateFlags(Update::Force | Update::FitCursor);
 927
 928                 tie(endpit, endpos) =
 929                         eraseSelectionHelper(bp, text->paragraphs(), begpit, endpit,
 930                                              cur.selBegin().pos(), endpos);
 931
 932                 // cutSelection can invalidate the cursor so we need to set
 933                 // it anew. (Lgb)
 934                 // we prefer the end for when tracking changes
 935                 cur.pos() = endpos;
 936                 cur.pit() = endpit;
 937
 938                 // sometimes necessary
 939                 if (doclear
 940                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.track_changes))
 941                         cur.fixIfBroken();
 942
 943                 // need a valid cursor. (Lgb)
 944                 cur.clearSelection();
 945
 946                 // After a cut operation, we must make sure that the Buffer is updated
 947                 // because some further operation might need updated label information for
 948                 // example. So we cannot just use "cur.forceBufferUpdate()" here.
 949                 // This fixes #7071.
 950                 cur.buffer()->updateBuffer();
 951
 952                 // tell tabular that a recent copy happened
 953                 dirtyTabularStack(false);
 954         }
 955
 956         if (cur.inMathed()) {
 957                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 958                         // The current selection spans more than one cell.
 959                         // Record all cells
 960                         cur.recordUndoInset();
 961                 } else {
 962                         // Record only the current cell to avoid a jumping
 963                         // cursor after undo
 964                         cur.recordUndo();
 965                 }
 966                 if (realcut)
 967                         copySelection(cur);
 968                 eraseSelection(cur);
 969         }
 970 }
 971
 972 } // namespace
 973
 974 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 975 {
 976         cutSelectionHelper(cur, theCuts, doclear, realcut, true);
 977 }
 978
 979
 980 void cutSelectionToTemp(Cursor & cur, bool doclear, bool realcut)
 981 {
 982         cutSelectionHelper(cur, tempCut, doclear, realcut, false);
 983 }
 984
 985
 986 void copySelection(Cursor const & cur)
 987 {
 988         copySelection(cur, cur.selectionAsString(true));
 989 }
 990
 991
 992 void copyInset(Cursor const & cur, Inset * inset, docstring const & plaintext)
 993 {
 994         ParagraphList pars;
 995         Paragraph par;
 996         BufferParams const & bp = cur.buffer()->params();
 997         par.setLayout(bp.documentClass().plainLayout());
 998         Font font(inherit_font, bp.language);
 999         par.insertInset(0, inset, font, Change(Change::UNCHANGED));
1000         pars.push_back(par);
1001         theCuts.push(make_pair(pars, bp.documentClassPtr()));
1002
1003         // stuff the selection onto the X clipboard, from an explicit copy request
1004         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
1005 }
1006
1007
1008 namespace {
1009
1010 void copySelectionToStack(Cursor const & cur, CutStack & cutstack)
1011 {
1012         // this doesn't make sense, if there is no selection
1013         if (!cur.selection())
1014                 return;
1015
1016         // copySelection can not yet handle the case of cross idx selection
1017         if (cur.selBegin().idx() != cur.selEnd().idx())
1018                 return;
1019
1020         if (cur.inTexted()) {
1021                 Text * text = cur.text();
1022                 LBUFERR(text);
1023                 // ok we have a selection. This is always between cur.selBegin()
1024                 // and sel_end cursor
1025                 copySelectionHelper(*cur.buffer(), *text,
1026                                     cur.selBegin().pit(), cur.selEnd().pit(),
1027                                     cur.selBegin().pos(), cur.selEnd().pos(),
1028                                     cur.buffer()->params().documentClassPtr(),
1029                                     cutstack);
1030                 // Reset the dirty_tabular_stack_ flag only when something
1031                 // is copied to the clipboard (not to the selectionBuffer).
1032                 if (&cutstack == &theCuts)
1033                         dirtyTabularStack(false);
1034         }
1035
1036         if (cur.inMathed()) {
1037                 //lyxerr << "copySelection in mathed" << endl;
1038                 ParagraphList pars;
1039                 Paragraph par;
1040                 BufferParams const & bp = cur.buffer()->params();
1041                 // FIXME This should be the plain layout...right?
1042                 par.setLayout(bp.documentClass().plainLayout());
1043                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
1044                 pars.push_back(par);
1045                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
1046         }
1047 }
1048
1049 } // namespace
1050
1051
1052 void copySelectionToStack()
1053 {
1054         if (!selectionBuffer.empty())
1055                 theCuts.push(selectionBuffer[0]);
1056 }
1057
1058
1059 void copySelection(Cursor const & cur, docstring const & plaintext)
1060 {
1061         // In tablemode, because copy and paste actually use special table stack
1062         // we do not attempt to get selected paragraphs under cursor. Instead, a
1063         // paragraph with the plain text version is generated so that table cells
1064         // can be pasted as pure text somewhere else.
1065         if (cur.selBegin().idx() != cur.selEnd().idx()) {
1066                 ParagraphList pars;
1067                 Paragraph par;
1068                 BufferParams const & bp = cur.buffer()->params();
1069                 par.setLayout(bp.documentClass().plainLayout());
1070                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
1071                 pars.push_back(par);
1072                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
1073         } else {
1074                 copySelectionToStack(cur, theCuts);
1075         }
1076
1077         // stuff the selection onto the X clipboard, from an explicit copy request
1078         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
1079 }
1080
1081
1082 void saveSelection(Cursor const & cur)
1083 {
1084         // This function is called, not when a selection is formed, but when
1085         // a selection is cleared. Therefore, multiple keyboard selection
1086         // will not repeatively trigger this function (bug 3877).
1087         if (cur.selection()
1088             && cur.selBegin() == cur.bv().cursor().selBegin()
1089             && cur.selEnd() == cur.bv().cursor().selEnd()) {
1090                 LYXERR(Debug::SELECTION, "saveSelection: '" << cur.selectionAsString(true) << "'");
1091                 copySelectionToStack(cur, selectionBuffer);
1092         }
1093 }
1094
1095
1096 bool selection()
1097 {
1098         return !selectionBuffer.empty();
1099 }
1100
1101
1102 void clearSelection()
1103 {
1104         selectionBuffer.clear();
1105 }
1106
1107
1108 void clearCutStack()
1109 {
1110         theCuts.clear();
1111         tempCut.clear();
1112 }
1113
1114
1115 docstring selection(size_t sel_index, DocumentClassConstPtr docclass)
1116 {
1117         if (sel_index >= theCuts.size())
1118                 return docstring();
1119
1120         unique_ptr<Buffer> buffer(copyToTempBuffer(theCuts[sel_index].first,
1121                                                    docclass));
1122         if (!buffer)
1123                 return docstring();
1124
1125         return buffer->paragraphs().back().asString(AS_STR_INSETS | AS_STR_NEWLINES);
1126 }
1127
1128
1129 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
1130                                                 DocumentClassConstPtr docclass, ErrorList & errorList,
1131                                                 cap::BranchAction branchAction)
1132 {
1133         if (cur.inTexted()) {
1134                 Text * text = cur.text();
1135                 LBUFERR(text);
1136
1137                 PasteReturnValue prv =
1138                         pasteSelectionHelper(cur, parlist, docclass, branchAction, errorList);
1139                 cur.forceBufferUpdate();
1140                 cur.clearSelection();
1141                 text->setCursor(cur, prv.pit, prv.pos);
1142         }
1143
1144         // mathed is handled in InsetMathNest/InsetMathGrid
1145         LATTEST(!cur.inMathed());
1146 }
1147
1148
1149 bool pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
1150 {
1151         // this does not make sense, if there is nothing to paste
1152         if (!checkPastePossible(sel_index))
1153                 return false;
1154
1155         cur.recordUndo();
1156         pasteParagraphList(cur, theCuts[sel_index].first,
1157                            theCuts[sel_index].second, errorList, BRANCH_ASK);
1158         return true;
1159 }
1160
1161
1162 bool pasteFromTemp(Cursor & cur, ErrorList & errorList)
1163 {
1164         // this does not make sense, if there is nothing to paste
1165         if (tempCut.empty() || tempCut[0].first.empty())
1166                 return false;
1167
1168         cur.recordUndo();
1169         pasteParagraphList(cur, tempCut[0].first,
1170                            tempCut[0].second, errorList, BRANCH_IGNORE);
1171         return true;
1172 }
1173
1174
1175 bool pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs,
1176                         Clipboard::TextType type)
1177 {
1178         // Use internal clipboard if it is the most recent one
1179         // This overrides asParagraphs and type on purpose!
1180         if (theClipboard().isInternal())
1181                 return pasteFromStack(cur, errorList, 0);
1182
1183         // First try LyX format
1184         if ((type == Clipboard::LyXTextType ||
1185              type == Clipboard::LyXOrPlainTextType ||
1186              type == Clipboard::AnyTextType) &&
1187             theClipboard().hasTextContents(Clipboard::LyXTextType)) {
1188                 string lyx = theClipboard().getAsLyX();
1189                 if (!lyx.empty()) {
1190                         // For some strange reason gcc 3.2 and 3.3 do not accept
1191                         // Buffer buffer(string(), false);
1192                         Buffer buffer("", false);
1193                         buffer.setUnnamed(true);
1194                         if (buffer.readString(lyx)) {
1195                                 cur.recordUndo();
1196                                 pasteParagraphList(cur, buffer.paragraphs(),
1197                                         buffer.params().documentClassPtr(), errorList);
1198                                 return true;
1199                         }
1200                 }
1201         }
1202
1203         // Then try TeX and HTML
1204         Clipboard::TextType types[2] = {Clipboard::HtmlTextType, Clipboard::LaTeXTextType};
1205         string names[2] = {"html", "latexclipboard"};
1206         for (int i = 0; i < 2; ++i) {
1207                 if (type != types[i] && type != Clipboard::AnyTextType)
1208                         continue;
1209                 bool available = theClipboard().hasTextContents(types[i]);
1210
1211                 // If a specific type was explicitly requested, try to
1212                 // interpret plain text: The user told us that the clipboard
1213                 // contents is in the desired format
1214                 if (!available && type == types[i]) {
1215                         types[i] = Clipboard::PlainTextType;
1216                         available = theClipboard().hasTextContents(types[i]);
1217                 }
1218
1219                 if (available) {
1220                         docstring text = theClipboard().getAsText(types[i]);
1221                         available = !text.empty();
1222                         if (available) {
1223                                 // For some strange reason gcc 3.2 and 3.3 do not accept
1224                                 // Buffer buffer(string(), false);
1225                                 Buffer buffer("", false);
1226                                 buffer.setUnnamed(true);
1227                                 available = buffer.importString(names[i], text, errorList);
1228                                 if (available)
1229                                         available = !buffer.paragraphs().empty();
1230                                 if (available && !buffer.paragraphs()[0].empty()) {
1231                                         cur.recordUndo();
1232                                         pasteParagraphList(cur, buffer.paragraphs(),
1233                                                 buffer.params().documentClassPtr(), errorList);
1234                                         return true;
1235                                 }
1236                         }
1237                 }
1238         }
1239
1240         // Then try plain text
1241         docstring const text = theClipboard().getAsText(Clipboard::PlainTextType);
1242         if (text.empty())
1243                 return false;
1244         cur.recordUndo();
1245         if (asParagraphs)
1246                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1247         else
1248                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1249         cur.forceBufferUpdate();
1250         return true;
1251 }
1252
1253
1254 void pasteSimpleText(Cursor & cur, bool asParagraphs)
1255 {
1256         docstring text;
1257         // Use internal clipboard if it is the most recent one
1258         if (theClipboard().isInternal()) {
1259                 if (!checkPastePossible(0))
1260                         return;
1261
1262                 ParagraphList const & pars = theCuts[0].first;
1263                 ParagraphList::const_iterator it = pars.begin();
1264                 for (; it != pars.end(); ++it) {
1265                         if (it != pars.begin())
1266                                 text += "\n";
1267                         text += (*it).asString();
1268                 }
1269                 asParagraphs = false;
1270         } else {
1271                 // Then try plain text
1272                 text = theClipboard().getAsText(Clipboard::PlainTextType);
1273         }
1274
1275         if (text.empty())
1276                 return;
1277
1278         cur.recordUndo();
1279         cutSelection(cur, true, false);
1280         if (asParagraphs)
1281                 cur.text()->insertStringAsParagraphs(cur, text, cur.current_font);
1282         else
1283                 cur.text()->insertStringAsLines(cur, text, cur.current_font);
1284 }
1285
1286
1287 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
1288                             Clipboard::GraphicsType preferedType)
1289 {
1290         LASSERT(theClipboard().hasGraphicsContents(preferedType), return);
1291
1292         // get picture from clipboard
1293         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
1294         if (filename.empty())
1295                 return;
1296
1297         // create inset for graphic
1298         InsetGraphics * inset = new InsetGraphics(cur.buffer());
1299         InsetGraphicsParams params;
1300         params.filename = support::DocFileName(filename.absFileName(), false);
1301         inset->setParams(params);
1302         cur.recordUndo();
1303         cur.insert(inset);
1304 }
1305
1306
1307 void pasteSelection(Cursor & cur, ErrorList & errorList)
1308 {
1309         if (selectionBuffer.empty())
1310                 return;
1311         cur.recordUndo();
1312         pasteParagraphList(cur, selectionBuffer[0].first,
1313                            selectionBuffer[0].second, errorList);
1314 }
1315
1316
1317 void replaceSelectionWithString(Cursor & cur, docstring const & str)
1318 {
1319         cur.recordUndo();
1320         DocIterator selbeg = cur.selectionBegin();
1321
1322         // Get font setting before we cut, we need a copy here, not a bare reference.
1323         Font const font =
1324                 selbeg.paragraph().getFontSettings(cur.buffer()->params(), selbeg.pos());
1325
1326         // Insert the new string
1327         pos_type pos = cur.selEnd().pos();
1328         Paragraph & par = cur.selEnd().paragraph();
1329         docstring::const_iterator cit = str.begin();
1330         docstring::const_iterator end = str.end();
1331         for (; cit != end; ++cit, ++pos)
1332                 par.insertChar(pos, *cit, font, cur.buffer()->params().track_changes);
1333
1334         // Cut the selection
1335         cutSelection(cur, true, false);
1336 }
1337
1338
1339 void replaceSelection(Cursor & cur)
1340 {
1341         if (cur.selection())
1342                 cutSelection(cur, true, false);
1343 }
1344
1345
1346 void eraseSelection(Cursor & cur)
1347 {
1348         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
1349         CursorSlice const & i1 = cur.selBegin();
1350         CursorSlice const & i2 = cur.selEnd();
1351         if (!i1.asInsetMath()) {
1352                 LYXERR0("Can't erase this selection");
1353                 return;
1354         }
1355
1356         saveSelection(cur);
1357         cur.top() = i1;
1358         InsetMath * p = i1.asInsetMath();
1359         if (i1.idx() == i2.idx()) {
1360                 i1.cell().erase(i1.pos(), i2.pos());
1361                 // We may have deleted i1.cell(cur.pos()).
1362                 // Make sure that pos is valid.
1363                 if (cur.pos() > cur.lastpos())
1364                         cur.pos() = cur.lastpos();
1365         } else if (p->nrows() > 0 && p->ncols() > 0) {
1366                 // This is a grid, delete a nice square region
1367                 Inset::row_type r1, r2;
1368                 Inset::col_type c1, c2;
1369                 region(i1, i2, r1, r2, c1, c2);
1370                 for (Inset::row_type row = r1; row <= r2; ++row)
1371                         for (Inset::col_type col = c1; col <= c2; ++col)
1372                                 p->cell(p->index(row, col)).clear();
1373                 // We've deleted the whole cell. Only pos 0 is valid.
1374                 cur.pos() = 0;
1375         } else {
1376                 Inset::idx_type idx1 = i1.idx();
1377                 Inset::idx_type idx2 = i2.idx();
1378                 if (idx1 > idx2)
1379                         swap(idx1, idx2);
1380                 for (Inset::idx_type idx = idx1 ; idx <= idx2; ++idx)
1381                         p->cell(idx).clear();
1382                 // We've deleted the whole cell. Only pos 0 is valid.
1383                 cur.pos() = 0;
1384         }
1385
1386         // need a valid cursor. (Lgb)
1387         cur.clearSelection();
1388         //lyxerr << "cap::eraseSelection end: " << cur << endl;
1389 }
1390
1391
1392 void selDel(Cursor & cur)
1393 {
1394         //lyxerr << "cap::selDel" << endl;
1395         if (cur.selection())
1396                 eraseSelection(cur);
1397 }
1398
1399
1400 void selClearOrDel(Cursor & cur)
1401 {
1402         //lyxerr << "cap::selClearOrDel" << endl;
1403         if (lyxrc.auto_region_delete)
1404                 selDel(cur);
1405         else
1406                 cur.selection(false);
1407 }
1408
1409
1410 docstring grabSelection(Cursor const & cur)
1411 {
1412         if (!cur.selection())
1413                 return docstring();
1414
1415 #if 0
1416         // grab selection by glueing multiple cells together. This is not what
1417         // we want because selections spanning multiple cells will get "&" and "\\"
1418         // seperators.
1419         ostringstream os;
1420         for (DocIterator dit = cur.selectionBegin();
1421              dit != cur.selectionEnd(); dit.forwardPos())
1422                 os << asString(dit.cell());
1423         return os.str();
1424 #endif
1425
1426         CursorSlice i1 = cur.selBegin();
1427         CursorSlice i2 = cur.selEnd();
1428
1429         if (i1.idx() == i2.idx()) {
1430                 if (i1.inset().asInsetMath()) {
1431                         MathData::const_iterator it = i1.cell().begin();
1432                         Buffer * buf = cur.buffer();
1433                         return asString(MathData(buf, it + i1.pos(), it + i2.pos()));
1434                 } else {
1435                         return from_ascii("unknown selection 1");
1436                 }
1437         }
1438
1439         Inset::row_type r1, r2;
1440         Inset::col_type c1, c2;
1441         region(i1, i2, r1, r2, c1, c2);
1442
1443         docstring data;
1444         if (i1.inset().asInsetMath()) {
1445                 for (Inset::row_type row = r1; row <= r2; ++row) {
1446                         if (row > r1)
1447                                 data += "\\\\";
1448                         for (Inset::col_type col = c1; col <= c2; ++col) {
1449                                 if (col > c1)
1450                                         data += '&';
1451                                 data += asString(i1.asInsetMath()->
1452                                         cell(i1.asInsetMath()->index(row, col)));
1453                         }
1454                 }
1455         } else {
1456                 data = from_ascii("unknown selection 2");
1457         }
1458         return data;
1459 }
1460
1461
1462 void dirtyTabularStack(bool b)
1463 {
1464         dirty_tabular_stack_ = b;
1465 }
1466
1467
1468 bool tabularStackDirty()
1469 {
1470         return dirty_tabular_stack_;
1471 }
1472
1473
1474 } // namespace cap
1475 } // namespace lyx