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 "Buffer.h"
  19 #include "buffer_funcs.h"
  20 #include "BufferParams.h"
  21 #include "BufferView.h"
  22 #include "Changes.h"
  23 #include "Cursor.h"
  24 #include "ErrorList.h"
  25 #include "FuncRequest.h"
  26 #include "InsetIterator.h"
  27 #include "InsetList.h"
  28 #include "Language.h"
  29 #include "lfuns.h"
  30 #include "LyXFunc.h"
  31 #include "LyXRC.h"
  32 #include "Text.h"
  33 #include "TextClassList.h"
  34 #include "Paragraph.h"
  35 #include "paragraph_funcs.h"
  36 #include "ParagraphParameters.h"
  37 #include "ParIterator.h"
  38 #include "Undo.h"
  39
  40 #include "insets/InsetFlex.h"
  41 #include "insets/InsetGraphics.h"
  42 #include "insets/InsetGraphicsParams.h"
  43 #include "insets/InsetTabular.h"
  44
  45 #include "mathed/MathData.h"
  46 #include "mathed/InsetMath.h"
  47 #include "mathed/MathSupport.h"
  48
  49 #include "support/debug.h"
  50 #include "support/docstream.h"
  51 #include "support/gettext.h"
  52 #include "support/limited_stack.h"
  53 #include "support/lstrings.h"
  54
  55 #include "frontends/Clipboard.h"
  56 #include "frontends/Selection.h"
  57
  58 #include <boost/tuple/tuple.hpp>
  59 #include <boost/next_prior.hpp>
  60
  61 #include <string>
  62
  63 using namespace std;
  64 using namespace lyx::support;
  65 using lyx::frontend::Clipboard;
  66
  67 namespace lyx {
  68
  69 namespace {
  70
  71 typedef pair<pit_type, int> PitPosPair;
  72
  73 typedef limited_stack<pair<ParagraphList, TextClassIndex> > CutStack;
  74
  75 CutStack theCuts(10);
  76 // persistent selection, cleared until the next selection
  77 CutStack selectionBuffer(1);
  78
  79 // store whether the tabular stack is newer than the normal copy stack
  80 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  81 // when we (hopefully) have a one-for-all paste mechanism.
  82 bool dirty_tabular_stack_ = false;
  83
  84
  85 void region(CursorSlice const & i1, CursorSlice const & i2,
  86         Inset::row_type & r1, Inset::row_type & r2,
  87         Inset::col_type & c1, Inset::col_type & c2)
  88 {
  89         Inset & p = i1.inset();
  90         c1 = p.col(i1.idx());
  91         c2 = p.col(i2.idx());
  92         if (c1 > c2)
  93                 swap(c1, c2);
  94         r1 = p.row(i1.idx());
  95         r2 = p.row(i2.idx());
  96         if (r1 > r2)
  97                 swap(r1, r2);
  98 }
  99
 100
 101 bool checkPastePossible(int index)
 102 {
 103         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 104 }
 105
 106
 107 pair<PitPosPair, pit_type>
 108 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 109                      TextClassIndex const & textclass, ErrorList & errorlist)
 110 {
 111         Buffer const & buffer = cur.buffer();
 112         pit_type pit = cur.pit();
 113         pos_type pos = cur.pos();
 114         ParagraphList & pars = cur.text()->paragraphs();
 115
 116         if (parlist.empty())
 117                 return make_pair(PitPosPair(pit, pos), pit);
 118
 119         BOOST_ASSERT (pos <= pars[pit].size());
 120
 121         // Make a copy of the CaP paragraphs.
 122         ParagraphList insertion = parlist;
 123         TextClassIndex tcindex = buffer.params().textClassIndex();
 124
 125         // Now remove all out of the pars which is NOT allowed in the
 126         // new environment and set also another font if that is required.
 127
 128         // Convert newline to paragraph break in ERT inset.
 129         // This should not be here!
 130         if (pars[pit].inInset() &&
 131             (pars[pit].inInset()->lyxCode() == ERT_CODE ||
 132                 pars[pit].inInset()->lyxCode() == LISTINGS_CODE)) {
 133                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 134                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 135                                 if (insertion[i].isNewline(j)) {
 136                                         // do not track deletion of newline
 137                                         insertion[i].eraseChar(j, false);
 138                                         breakParagraphConservative(
 139                                                         buffer.params(),
 140                                                         insertion, i, j);
 141                                 }
 142                         }
 143                 }
 144         }
 145
 146         // set the paragraphs to empty layout if necessary
 147         // note that we are doing this if the empty layout is
 148         // supposed to be the default, not just if it is forced
 149         if (cur.inset().useEmptyLayout()) {
 150                 LayoutPtr const layout =
 151                         buffer.params().textClass().emptyLayout();
 152                 ParagraphList::iterator const end = insertion.end();
 153                 for (ParagraphList::iterator par = insertion.begin();
 154                                 par != end; ++par)
 155                         par->layout(layout);
 156         }
 157
 158         // Make sure there is no class difference.
 159         InsetText in;
 160         // This works without copying any paragraph data because we have
 161         // a specialized swap method for ParagraphList. This is important
 162         // since we store pointers to insets at some places and we don't
 163         // want to invalidate them.
 164         insertion.swap(in.paragraphs());
 165         cap::switchBetweenClasses(textclass, tcindex, in, errorlist);
 166         insertion.swap(in.paragraphs());
 167
 168         ParagraphList::iterator tmpbuf = insertion.begin();
 169         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 170
 171         depth_type max_depth = pars[pit].getMaxDepthAfter();
 172
 173         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 174                 // If we have a negative jump so that the depth would
 175                 // go below 0 depth then we have to redo the delta to
 176                 // this new max depth level so that subsequent
 177                 // paragraphs are aligned correctly to this paragraph
 178                 // at level 0.
 179                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 180                         depth_delta = 0;
 181
 182                 // Set the right depth so that we are not too deep or shallow.
 183                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 184                 if (tmpbuf->params().depth() > max_depth)
 185                         tmpbuf->params().depth(max_depth);
 186
 187                 // Only set this from the 2nd on as the 2nd depends
 188                 // for maxDepth still on pit.
 189                 if (tmpbuf != insertion.begin())
 190                         max_depth = tmpbuf->getMaxDepthAfter();
 191
 192                 // Set the inset owner of this paragraph.
 193                 tmpbuf->setInsetOwner(pars[pit].inInset());
 194                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 195                         // do not track deletion of invalid insets
 196                         if (Inset * inset = tmpbuf->getInset(i))
 197                                 if (!pars[pit].insetAllowed(inset->lyxCode()))
 198                                         tmpbuf->eraseChar(i--, false);
 199                 }
 200
 201                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 202                                          Change::INSERTED : Change::UNCHANGED));
 203         }
 204
 205         bool const empty = pars[pit].empty();
 206         if (!empty) {
 207                 // Make the buf exactly the same layout as the cursor
 208                 // paragraph.
 209                 insertion.begin()->makeSameLayout(pars[pit]);
 210         }
 211
 212         // Prepare the paragraphs and insets for insertion.
 213         // A couple of insets store buffer references so need updating.
 214         insertion.swap(in.paragraphs());
 215
 216         ParIterator fpit = par_iterator_begin(in);
 217         ParIterator fend = par_iterator_end(in);
 218
 219         for (; fpit != fend; ++fpit) {
 220                 InsetList::const_iterator lit = fpit->insetList().begin();
 221                 InsetList::const_iterator eit = fpit->insetList().end();
 222
 223                 for (; lit != eit; ++lit) {
 224                         switch (lit->inset->lyxCode()) {
 225                         case TABULAR_CODE: {
 226                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 227                                 it->buffer(&buffer);
 228                                 break;
 229                         }
 230
 231                         default:
 232                                 break; // nothing
 233                         }
 234                 }
 235         }
 236         insertion.swap(in.paragraphs());
 237
 238         // Split the paragraph for inserting the buf if necessary.
 239         if (!empty)
 240                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 241
 242         // Paste it!
 243         if (empty) {
 244                 pars.insert(boost::next(pars.begin(), pit),
 245                             insertion.begin(),
 246                             insertion.end());
 247
 248                 // merge the empty par with the last par of the insertion
 249                 mergeParagraph(buffer.params(), pars,
 250                                pit + insertion.size() - 1);
 251         } else {
 252                 pars.insert(boost::next(pars.begin(), pit + 1),
 253                             insertion.begin(),
 254                             insertion.end());
 255
 256                 // merge the first par of the insertion with the current par
 257                 mergeParagraph(buffer.params(), pars, pit);
 258         }
 259
 260         pit_type last_paste = pit + insertion.size() - 1;
 261
 262         // Store the new cursor position.
 263         pit = last_paste;
 264         pos = pars[last_paste].size();
 265
 266         // Join (conditionally) last pasted paragraph with next one, i.e.,
 267         // the tail of the spliced document paragraph
 268         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 269                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 270                         mergeParagraph(buffer.params(), pars, last_paste);
 271                 } else if (pars[last_paste + 1].empty()) {
 272                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 273                         mergeParagraph(buffer.params(), pars, last_paste);
 274                 } else if (pars[last_paste].empty()) {
 275                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 276                         mergeParagraph(buffer.params(), pars, last_paste);
 277                 } else {
 278                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 279                         ++last_paste;
 280                 }
 281         }
 282
 283         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 284 }
 285
 286
 287 PitPosPair eraseSelectionHelper(BufferParams const & params,
 288         ParagraphList & pars,
 289         pit_type startpit, pit_type endpit,
 290         int startpos, int endpos)
 291 {
 292         // Start of selection is really invalid.
 293         if (startpit == pit_type(pars.size()) ||
 294             (startpos > pars[startpit].size()))
 295                 return PitPosPair(endpit, endpos);
 296
 297         // Start and end is inside same paragraph
 298         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 299                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 300                 return PitPosPair(endpit, endpos);
 301         }
 302
 303         for (pit_type pit = startpit; pit != endpit + 1;) {
 304                 pos_type const left  = (pit == startpit ? startpos : 0);
 305                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 306                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 307
 308                 // Logically erase only, including the end-of-paragraph character
 309                 pars[pit].eraseChars(left, right, params.trackChanges);
 310
 311                 // Separate handling of paragraph break:
 312                 if (merge && pit != endpit &&
 313                     (pit + 1 != endpit
 314                      || pars[pit].hasSameLayout(pars[endpit])
 315                      || pars[endpit].size() == endpos)) {
 316                         if (pit + 1 == endpit)
 317                                 endpos += pars[pit].size();
 318                         mergeParagraph(params, pars, pit);
 319                         --endpit;
 320                 } else
 321                         ++pit;
 322         }
 323
 324         // Ensure legal cursor pos:
 325         endpit = startpit;
 326         endpos = startpos;
 327         return PitPosPair(endpit, endpos);
 328 }
 329
 330
 331 void putClipboard(ParagraphList const & paragraphs, TextClassIndex textclass,
 332                   docstring const & plaintext)
 333 {
 334         // For some strange reason gcc 3.2 and 3.3 do not accept
 335         // Buffer buffer(string(), false);
 336         Buffer buffer("", false);
 337         buffer.setUnnamed(true);
 338         buffer.paragraphs() = paragraphs;
 339         buffer.params().setTextClass(textclass);
 340         ostringstream lyx;
 341         if (buffer.write(lyx))
 342                 theClipboard().put(lyx.str(), plaintext);
 343         else
 344                 theClipboard().put(string(), plaintext);
 345 }
 346
 347
 348 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 349         pit_type startpit, pit_type endpit,
 350         int start, int end, TextClassIndex tc, CutStack & cutstack)
 351 {
 352         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 353         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 354         BOOST_ASSERT(startpit != endpit || start <= end);
 355
 356         // Clone the paragraphs within the selection.
 357         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 358                                 boost::next(pars.begin(), endpit + 1));
 359
 360         // Remove the end of the last paragraph; afterwards, remove the
 361         // beginning of the first paragraph. Keep this order - there may only
 362         // be one paragraph!  Do not track deletions here; this is an internal
 363         // action not visible to the user
 364
 365         Paragraph & back = copy_pars.back();
 366         back.eraseChars(end, back.size(), false);
 367         Paragraph & front = copy_pars.front();
 368         front.eraseChars(0, start, false);
 369
 370         ParagraphList::iterator it = copy_pars.begin();
 371         ParagraphList::iterator it_end = copy_pars.end();
 372
 373         for (; it != it_end; it++) {
 374                 // ERT paragraphs have the Language latex_language.
 375                 // This is invalid outside of ERT, so we need to change it
 376                 // to the buffer language.
 377                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 378                         it->changeLanguage(buf.params(), latex_language, buf.language());
 379                 }
 380                 it->setInsetOwner(0);
 381         }
 382
 383         // do not copy text (also nested in insets) which is marked as deleted
 384         acceptChanges(copy_pars, buf.params());
 385
 386         cutstack.push(make_pair(copy_pars, tc));
 387 }
 388
 389 } // namespace anon
 390
 391
 392
 393
 394 namespace cap {
 395
 396 docstring grabAndEraseSelection(Cursor & cur)
 397 {
 398         if (!cur.selection())
 399                 return docstring();
 400         docstring res = grabSelection(cur);
 401         eraseSelection(cur);
 402         return res;
 403 }
 404
 405
 406 void switchBetweenClasses(TextClassIndex const & oldtcindex,
 407         TextClassIndex const & newtcindex, InsetText & in, ErrorList & errorlist)
 408 {
 409         errorlist.clear();
 410
 411         BOOST_ASSERT(!in.paragraphs().empty());
 412         if (oldtcindex == newtcindex)
 413                 return;
 414
 415         // layouts
 416         ParIterator end = par_iterator_end(in);
 417         TextClass const & oldtc = textclasslist[oldtcindex];
 418         TextClass const & newtc = textclasslist[newtcindex];
 419         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 420                 docstring const name = it->layout()->name();
 421                 bool hasLayout = newtc.hasLayout(name);
 422
 423                 if (hasLayout)
 424                         it->layout(newtc[name]);
 425                 else
 426                         it->layout(newtc.defaultLayout());
 427
 428                 if (!hasLayout && name != oldtc.defaultLayoutName()) {
 429                         docstring const s = bformat(
 430                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 431                                                 "because of class conversion from\n%3$s to %4$s"),
 432                          name, it->layout()->name(),
 433                          from_utf8(oldtc.name()), from_utf8(newtc.name()));
 434                         // To warn the user that something had to be done.
 435                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 436                                                       it->id(), 0,
 437                                                       it->size()));
 438                 }
 439         }
 440
 441         // character styles
 442         InsetIterator const i_end = inset_iterator_end(in);
 443         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 444                 InsetCollapsable * inset = it->asInsetCollapsable();
 445                 if (!inset)
 446                         continue;
 447                 if (inset->lyxCode() != FLEX_CODE)
 448                         // FIXME: Should we verify all InsetCollapsable?
 449                         continue;
 450                 inset->setLayout(newtcindex);
 451                 if (!inset->undefined())
 452                         continue;
 453                 // The flex inset is undefined in newtc
 454                 docstring const s = bformat(_(
 455                         "Flex inset %1$s is "
 456                         "undefined because of class "
 457                         "conversion from\n%2$s to %3$s"),
 458                         inset->name(), from_utf8(oldtc.name()),
 459                         from_utf8(newtc.name()));
 460                 // To warn the user that something had to be done.
 461                 errorlist.push_back(ErrorItem(
 462                                 _("Undefined flex inset"),
 463                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 464         }
 465 }
 466
 467
 468 vector<docstring> const availableSelections(Buffer const & buffer)
 469 {
 470         vector<docstring> selList;
 471
 472         CutStack::const_iterator cit = theCuts.begin();
 473         CutStack::const_iterator end = theCuts.end();
 474         for (; cit != end; ++cit) {
 475                 // we do not use cit-> here because gcc 2.9x does not
 476                 // like it (JMarc)
 477                 ParagraphList const & pars = (*cit).first;
 478                 docstring asciiSel;
 479                 ParagraphList::const_iterator pit = pars.begin();
 480                 ParagraphList::const_iterator pend = pars.end();
 481                 for (; pit != pend; ++pit) {
 482                         asciiSel += pit->asString(buffer, false);
 483                         if (asciiSel.size() > 25) {
 484                                 asciiSel.replace(22, docstring::npos,
 485                                                  from_ascii("..."));
 486                                 break;
 487                         }
 488                 }
 489
 490                 selList.push_back(asciiSel);
 491         }
 492
 493         return selList;
 494 }
 495
 496
 497 size_type numberOfSelections()
 498 {
 499         return theCuts.size();
 500 }
 501
 502
 503 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 504 {
 505         // This doesn't make sense, if there is no selection
 506         if (!cur.selection())
 507                 return;
 508
 509         // OK, we have a selection. This is always between cur.selBegin()
 510         // and cur.selEnd()
 511
 512         if (cur.inTexted()) {
 513                 Text * text = cur.text();
 514                 BOOST_ASSERT(text);
 515
 516                 saveSelection(cur);
 517
 518                 // make sure that the depth behind the selection are restored, too
 519                 cur.recordUndoSelection();
 520                 pit_type begpit = cur.selBegin().pit();
 521                 pit_type endpit = cur.selEnd().pit();
 522
 523                 int endpos = cur.selEnd().pos();
 524
 525                 BufferParams const & bp = cur.buffer().params();
 526                 if (realcut) {
 527                         copySelectionHelper(cur.buffer(),
 528                                 text->paragraphs(),
 529                                 begpit, endpit,
 530                                 cur.selBegin().pos(), endpos,
 531                                 bp.textClassIndex(), theCuts);
 532                         // Stuff what we got on the clipboard.
 533                         // Even if there is no selection.
 534                         putClipboard(theCuts[0].first, theCuts[0].second,
 535                                 cur.selectionAsString(true));
 536                 }
 537
 538                 boost::tie(endpit, endpos) =
 539                         eraseSelectionHelper(bp,
 540                                 text->paragraphs(),
 541                                 begpit, endpit,
 542                                 cur.selBegin().pos(), endpos);
 543
 544                 // cutSelection can invalidate the cursor so we need to set
 545                 // it anew. (Lgb)
 546                 // we prefer the end for when tracking changes
 547                 cur.pos() = endpos;
 548                 cur.pit() = endpit;
 549
 550                 // sometimes necessary
 551                 if (doclear
 552                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 553                         cur.fixIfBroken();
 554
 555                 // need a valid cursor. (Lgb)
 556                 cur.clearSelection();
 557                 updateLabels(cur.buffer());
 558
 559                 // tell tabular that a recent copy happened
 560                 dirtyTabularStack(false);
 561         }
 562
 563         if (cur.inMathed()) {
 564                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 565                         // The current selection spans more than one cell.
 566                         // Record all cells
 567                         cur.recordUndoInset();
 568                 } else {
 569                         // Record only the current cell to avoid a jumping
 570                         // cursor after undo
 571                         cur.recordUndo();
 572                 }
 573                 if (realcut)
 574                         copySelection(cur);
 575                 eraseSelection(cur);
 576         }
 577 }
 578
 579
 580 void copySelection(Cursor & cur)
 581 {
 582         copySelection(cur, cur.selectionAsString(true));
 583 }
 584
 585
 586 namespace {
 587
 588 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 589 {
 590         // this doesn't make sense, if there is no selection
 591         if (!cur.selection())
 592                 return;
 593
 594         // copySelection can not yet handle the case of cross idx selection
 595         if (cur.selBegin().idx() != cur.selEnd().idx())
 596                 return;
 597
 598         if (cur.inTexted()) {
 599                 Text * text = cur.text();
 600                 BOOST_ASSERT(text);
 601                 // ok we have a selection. This is always between cur.selBegin()
 602                 // and sel_end cursor
 603
 604                 // copy behind a space if there is one
 605                 ParagraphList & pars = text->paragraphs();
 606                 pos_type pos = cur.selBegin().pos();
 607                 pit_type par = cur.selBegin().pit();
 608                 while (pos < pars[par].size() &&
 609                        pars[par].isLineSeparator(pos) &&
 610                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 611                         ++pos;
 612
 613                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 614                         pos, cur.selEnd().pos(),
 615                         cur.buffer().params().textClassIndex(), cutstack);
 616                 dirtyTabularStack(false);
 617         }
 618
 619         if (cur.inMathed()) {
 620                 //lyxerr << "copySelection in mathed" << endl;
 621                 ParagraphList pars;
 622                 Paragraph par;
 623                 BufferParams const & bp = cur.buffer().params();
 624                 par.layout(bp.textClass().defaultLayout());
 625                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 626                 pars.push_back(par);
 627                 cutstack.push(make_pair(pars, bp.textClassIndex()));
 628         }
 629 }
 630
 631 }
 632
 633
 634 void copySelectionToStack()
 635 {
 636         if (!selectionBuffer.empty())
 637                 theCuts.push(selectionBuffer[0]);
 638 }
 639
 640
 641 void copySelection(Cursor & cur, docstring const & plaintext)
 642 {
 643         // In tablemode, because copy and paste actually use special table stack
 644         // we do not attempt to get selected paragraphs under cursor. Instead, a
 645         // paragraph with the plain text version is generated so that table cells
 646         // can be pasted as pure text somewhere else.
 647         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 648                 ParagraphList pars;
 649                 Paragraph par;
 650                 BufferParams const & bp = cur.buffer().params();
 651                 par.layout(bp.textClass().defaultLayout());
 652                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 653                 pars.push_back(par);
 654                 theCuts.push(make_pair(pars, bp.textClassIndex()));
 655         } else {
 656                 copySelectionToStack(cur, theCuts);
 657         }
 658
 659         // stuff the selection onto the X clipboard, from an explicit copy request
 660         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 661 }
 662
 663
 664 void saveSelection(Cursor & cur)
 665 {
 666         // This function is called, not when a selection is formed, but when
 667         // a selection is cleared. Therefore, multiple keyboard selection
 668         // will not repeatively trigger this function (bug 3877).
 669         if (cur.selection()
 670             && cur.selBegin() == cur.bv().cursor().selBegin()
 671             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 672                 LYXERR(Debug::ACTION, "'" << cur.selectionAsString(true) << "'");
 673                 copySelectionToStack(cur, selectionBuffer);
 674         }
 675 }
 676
 677
 678 bool selection()
 679 {
 680         return !selectionBuffer.empty();
 681 }
 682
 683
 684 void clearSelection()
 685 {
 686         selectionBuffer.clear();
 687 }
 688
 689
 690 void clearCutStack()
 691 {
 692         theCuts.clear();
 693 }
 694
 695
 696 docstring getSelection(Buffer const & buf, size_t sel_index)
 697 {
 698         return sel_index < theCuts.size()
 699                 ? theCuts[sel_index].first.back().asString(buf, false)
 700                 : docstring();
 701 }
 702
 703
 704 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 705                         TextClassIndex const & textclass, ErrorList & errorList)
 706 {
 707         if (cur.inTexted()) {
 708                 Text * text = cur.text();
 709                 BOOST_ASSERT(text);
 710
 711                 pit_type endpit;
 712                 PitPosPair ppp;
 713
 714                 boost::tie(ppp, endpit) =
 715                         pasteSelectionHelper(cur, parlist, textclass, errorList);
 716                 updateLabels(cur.buffer());
 717                 cur.clearSelection();
 718                 text->setCursor(cur, ppp.first, ppp.second);
 719         }
 720
 721         // mathed is handled in InsetMathNest/InsetMathGrid
 722         BOOST_ASSERT(!cur.inMathed());
 723 }
 724
 725
 726 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 727 {
 728         // this does not make sense, if there is nothing to paste
 729         if (!checkPastePossible(sel_index))
 730                 return;
 731
 732         cur.recordUndo();
 733         pasteParagraphList(cur, theCuts[sel_index].first,
 734                            theCuts[sel_index].second, errorList);
 735         cur.setSelection();
 736 }
 737
 738
 739 void pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 740 {
 741         // Use internal clipboard if it is the most recent one
 742         if (theClipboard().isInternal()) {
 743                 pasteFromStack(cur, errorList, 0);
 744                 return;
 745         }
 746
 747         // First try LyX format
 748         if (theClipboard().hasLyXContents()) {
 749                 string lyx = theClipboard().getAsLyX();
 750                 if (!lyx.empty()) {
 751                         // For some strange reason gcc 3.2 and 3.3 do not accept
 752                         // Buffer buffer(string(), false);
 753                         Buffer buffer("", false);
 754                         buffer.setUnnamed(true);
 755                         if (buffer.readString(lyx)) {
 756                                 cur.recordUndo();
 757                                 pasteParagraphList(cur, buffer.paragraphs(),
 758                                         buffer.params().textClassIndex(), errorList);
 759                                 cur.setSelection();
 760                                 return;
 761                         }
 762                 }
 763         }
 764
 765         // Then try plain text
 766         docstring const text = theClipboard().getAsText();
 767         if (text.empty())
 768                 return;
 769         cur.recordUndo();
 770         if (asParagraphs)
 771                 cur.text()->insertStringAsParagraphs(cur, text);
 772         else
 773                 cur.text()->insertStringAsLines(cur, text);
 774 }
 775
 776
 777 void pasteClipboardGraphics(Cursor & cur, ErrorList & /*errorList*/,
 778                             Clipboard::GraphicsType preferedType)
 779 {
 780         BOOST_ASSERT(theClipboard().hasGraphicsContents(preferedType));
 781
 782         // get picture from clipboard
 783         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
 784         if (filename.empty())
 785                 return;
 786
 787         // create inset for graphic
 788         InsetGraphics * inset = new InsetGraphics;
 789         InsetGraphicsParams params;
 790         params.filename = EmbeddedFile(filename.absFilename(), cur.buffer().filePath());
 791         inset->setParams(params);
 792         cur.recordUndo();
 793         cur.insert(inset);
 794 }
 795
 796
 797 void pasteSelection(Cursor & cur, ErrorList & errorList)
 798 {
 799         if (selectionBuffer.empty())
 800                 return;
 801         cur.recordUndo();
 802         pasteParagraphList(cur, selectionBuffer[0].first,
 803                            selectionBuffer[0].second, errorList);
 804 }
 805
 806
 807 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 808 {
 809         cur.recordUndo();
 810         DocIterator selbeg = cur.selectionBegin();
 811
 812         // Get font setting before we cut
 813         Font const font =
 814                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 815
 816         // Insert the new string
 817         pos_type pos = cur.selEnd().pos();
 818         Paragraph & par = cur.selEnd().paragraph();
 819         docstring::const_iterator cit = str.begin();
 820         docstring::const_iterator end = str.end();
 821         for (; cit != end; ++cit, ++pos)
 822                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 823
 824         // Cut the selection
 825         cutSelection(cur, true, false);
 826
 827         // select the replacement
 828         if (backwards) {
 829                 selbeg.pos() += str.length();
 830                 cur.setSelection(selbeg, -int(str.length()));
 831         } else
 832                 cur.setSelection(selbeg, str.length());
 833 }
 834
 835
 836 void replaceSelection(Cursor & cur)
 837 {
 838         if (cur.selection())
 839                 cutSelection(cur, true, false);
 840 }
 841
 842
 843 void eraseSelection(Cursor & cur)
 844 {
 845         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 846         CursorSlice const & i1 = cur.selBegin();
 847         CursorSlice const & i2 = cur.selEnd();
 848         if (i1.inset().asInsetMath()) {
 849                 saveSelection(cur);
 850                 cur.top() = i1;
 851                 if (i1.idx() == i2.idx()) {
 852                         i1.cell().erase(i1.pos(), i2.pos());
 853                         // We may have deleted i1.cell(cur.pos()).
 854                         // Make sure that pos is valid.
 855                         if (cur.pos() > cur.lastpos())
 856                                 cur.pos() = cur.lastpos();
 857                 } else {
 858                         InsetMath * p = i1.asInsetMath();
 859                         Inset::row_type r1, r2;
 860                         Inset::col_type c1, c2;
 861                         region(i1, i2, r1, r2, c1, c2);
 862                         for (Inset::row_type row = r1; row <= r2; ++row)
 863                                 for (Inset::col_type col = c1; col <= c2; ++col)
 864                                         p->cell(p->index(row, col)).clear();
 865                         // We've deleted the whole cell. Only pos 0 is valid.
 866                         cur.pos() = 0;
 867                 }
 868                 // need a valid cursor. (Lgb)
 869                 cur.clearSelection();
 870         } else {
 871                 lyxerr << "can't erase this selection 1" << endl;
 872         }
 873         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 874 }
 875
 876
 877 void selDel(Cursor & cur)
 878 {
 879         //lyxerr << "cap::selDel" << endl;
 880         if (cur.selection())
 881                 eraseSelection(cur);
 882 }
 883
 884
 885 void selClearOrDel(Cursor & cur)
 886 {
 887         //lyxerr << "cap::selClearOrDel" << endl;
 888         if (lyxrc.auto_region_delete)
 889                 selDel(cur);
 890         else
 891                 cur.selection() = false;
 892 }
 893
 894
 895 docstring grabSelection(Cursor const & cur)
 896 {
 897         if (!cur.selection())
 898                 return docstring();
 899
 900         // FIXME: What is wrong with the following?
 901 #if 0
 902         ostringstream os;
 903         for (DocIterator dit = cur.selectionBegin();
 904              dit != cur.selectionEnd(); dit.forwardPos())
 905                 os << asString(dit.cell());
 906         return os.str();
 907 #endif
 908
 909         CursorSlice i1 = cur.selBegin();
 910         CursorSlice i2 = cur.selEnd();
 911
 912         if (i1.idx() == i2.idx()) {
 913                 if (i1.inset().asInsetMath()) {
 914                         MathData::const_iterator it = i1.cell().begin();
 915                         return asString(MathData(it + i1.pos(), it + i2.pos()));
 916                 } else {
 917                         return from_ascii("unknown selection 1");
 918                 }
 919         }
 920
 921         Inset::row_type r1, r2;
 922         Inset::col_type c1, c2;
 923         region(i1, i2, r1, r2, c1, c2);
 924
 925         docstring data;
 926         if (i1.inset().asInsetMath()) {
 927                 for (Inset::row_type row = r1; row <= r2; ++row) {
 928                         if (row > r1)
 929                                 data += "\\\\";
 930                         for (Inset::col_type col = c1; col <= c2; ++col) {
 931                                 if (col > c1)
 932                                         data += '&';
 933                                 data += asString(i1.asInsetMath()->
 934                                         cell(i1.asInsetMath()->index(row, col)));
 935                         }
 936                 }
 937         } else {
 938                 data = from_ascii("unknown selection 2");
 939         }
 940         return data;
 941 }
 942
 943
 944 void dirtyTabularStack(bool b)
 945 {
 946         dirty_tabular_stack_ = b;
 947 }
 948
 949
 950 bool tabularStackDirty()
 951 {
 952         return dirty_tabular_stack_;
 953 }
 954
 955
 956 } // namespace cap
 957
 958 } // namespace lyx