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/InsetTabular.h"
  42
  43 #include "mathed/MathData.h"
  44 #include "mathed/InsetMath.h"
  45 #include "mathed/MathSupport.h"
  46
  47 #include "support/debug.h"
  48 #include "support/docstream.h"
  49 #include "support/gettext.h"
  50 #include "support/limited_stack.h"
  51 #include "support/lstrings.h"
  52
  53 #include "frontends/Clipboard.h"
  54 #include "frontends/Selection.h"
  55
  56 #include <boost/tuple/tuple.hpp>
  57 #include <boost/next_prior.hpp>
  58
  59 #include <string>
  60
  61 using namespace std;
  62 using namespace lyx::support;
  63
  64 namespace lyx {
  65
  66 namespace {
  67
  68 typedef pair<pit_type, int> PitPosPair;
  69
  70 typedef limited_stack<pair<ParagraphList, TextClassPtr> > CutStack;
  71
  72 CutStack theCuts(10);
  73 // persistent selection, cleared until the next selection
  74 CutStack selectionBuffer(1);
  75
  76 // store whether the tabular stack is newer than the normal copy stack
  77 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  78 // when we (hopefully) have a one-for-all paste mechanism.
  79 bool dirty_tabular_stack_ = false;
  80
  81
  82 void region(CursorSlice const & i1, CursorSlice const & i2,
  83         Inset::row_type & r1, Inset::row_type & r2,
  84         Inset::col_type & c1, Inset::col_type & c2)
  85 {
  86         Inset & p = i1.inset();
  87         c1 = p.col(i1.idx());
  88         c2 = p.col(i2.idx());
  89         if (c1 > c2)
  90                 swap(c1, c2);
  91         r1 = p.row(i1.idx());
  92         r2 = p.row(i2.idx());
  93         if (r1 > r2)
  94                 swap(r1, r2);
  95 }
  96
  97
  98 bool checkPastePossible(int index)
  99 {
 100         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 101 }
 102
 103
 104 pair<PitPosPair, pit_type>
 105 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 106                      TextClassPtr textclass, ErrorList & errorlist)
 107 {
 108         Buffer const & buffer = cur.buffer();
 109         pit_type pit = cur.pit();
 110         pos_type pos = cur.pos();
 111         ParagraphList & pars = cur.text()->paragraphs();
 112
 113         if (parlist.empty())
 114                 return make_pair(PitPosPair(pit, pos), pit);
 115
 116         BOOST_ASSERT (pos <= pars[pit].size());
 117
 118         // Make a copy of the CaP paragraphs.
 119         ParagraphList insertion = parlist;
 120         TextClassPtr const tc = buffer.params().getTextClassPtr();
 121
 122         // Now remove all out of the pars which is NOT allowed in the
 123         // new environment and set also another font if that is required.
 124
 125         // Convert newline to paragraph break in ERT inset.
 126         // This should not be here!
 127         if (pars[pit].inInset() &&
 128             (pars[pit].inInset()->lyxCode() == ERT_CODE ||
 129                 pars[pit].inInset()->lyxCode() == LISTINGS_CODE)) {
 130                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 131                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 132                                 if (insertion[i].isNewline(j)) {
 133                                         // do not track deletion of newline
 134                                         insertion[i].eraseChar(j, false);
 135                                         breakParagraphConservative(
 136                                                         buffer.params(),
 137                                                         insertion, i, j);
 138                                 }
 139                         }
 140                 }
 141         }
 142
 143         // If we are in an inset which returns forceDefaultParagraphs,
 144         // set the paragraphs to default
 145         if (cur.inset().forceDefaultParagraphs(cur.idx())) {
 146                 LayoutPtr const layout =
 147                         buffer.params().getTextClass().defaultLayout();
 148                 ParagraphList::iterator const end = insertion.end();
 149                 for (ParagraphList::iterator par = insertion.begin();
 150                                 par != end; ++par)
 151                         par->layout(layout);
 152         }
 153
 154         // Make sure there is no class difference.
 155         InsetText in;
 156         // This works without copying any paragraph data because we have
 157         // a specialized swap method for ParagraphList. This is important
 158         // since we store pointers to insets at some places and we don't
 159         // want to invalidate them.
 160         insertion.swap(in.paragraphs());
 161         cap::switchBetweenClasses(textclass, tc, in, errorlist);
 162         insertion.swap(in.paragraphs());
 163
 164         ParagraphList::iterator tmpbuf = insertion.begin();
 165         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 166
 167         depth_type max_depth = pars[pit].getMaxDepthAfter();
 168
 169         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 170                 // If we have a negative jump so that the depth would
 171                 // go below 0 depth then we have to redo the delta to
 172                 // this new max depth level so that subsequent
 173                 // paragraphs are aligned correctly to this paragraph
 174                 // at level 0.
 175                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 176                         depth_delta = 0;
 177
 178                 // Set the right depth so that we are not too deep or shallow.
 179                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 180                 if (tmpbuf->params().depth() > max_depth)
 181                         tmpbuf->params().depth(max_depth);
 182
 183                 // Only set this from the 2nd on as the 2nd depends
 184                 // for maxDepth still on pit.
 185                 if (tmpbuf != insertion.begin())
 186                         max_depth = tmpbuf->getMaxDepthAfter();
 187
 188                 // Set the inset owner of this paragraph.
 189                 tmpbuf->setInsetOwner(pars[pit].inInset());
 190                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 191                         if (tmpbuf->isInset(i) &&
 192                             !pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 193                                 // do not track deletion of invalid insets
 194                                 tmpbuf->eraseChar(i--, false);
 195                 }
 196
 197                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 198                                          Change::INSERTED : Change::UNCHANGED));
 199         }
 200
 201         bool const empty = pars[pit].empty();
 202         if (!empty) {
 203                 // Make the buf exactly the same layout as the cursor
 204                 // paragraph.
 205                 insertion.begin()->makeSameLayout(pars[pit]);
 206         }
 207
 208         // Prepare the paragraphs and insets for insertion.
 209         // A couple of insets store buffer references so need updating.
 210         insertion.swap(in.paragraphs());
 211
 212         ParIterator fpit = par_iterator_begin(in);
 213         ParIterator fend = par_iterator_end(in);
 214
 215         for (; fpit != fend; ++fpit) {
 216                 InsetList::const_iterator lit = fpit->insetList().begin();
 217                 InsetList::const_iterator eit = fpit->insetList().end();
 218
 219                 for (; lit != eit; ++lit) {
 220                         switch (lit->inset->lyxCode()) {
 221                         case TABULAR_CODE: {
 222                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 223                                 it->buffer(&buffer);
 224                                 break;
 225                         }
 226
 227                         default:
 228                                 break; // nothing
 229                         }
 230                 }
 231         }
 232         insertion.swap(in.paragraphs());
 233
 234         // Split the paragraph for inserting the buf if necessary.
 235         if (!empty)
 236                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 237
 238         // Paste it!
 239         if (empty) {
 240                 pars.insert(boost::next(pars.begin(), pit),
 241                             insertion.begin(),
 242                             insertion.end());
 243
 244                 // merge the empty par with the last par of the insertion
 245                 mergeParagraph(buffer.params(), pars,
 246                                pit + insertion.size() - 1);
 247         } else {
 248                 pars.insert(boost::next(pars.begin(), pit + 1),
 249                             insertion.begin(),
 250                             insertion.end());
 251
 252                 // merge the first par of the insertion with the current par
 253                 mergeParagraph(buffer.params(), pars, pit);
 254         }
 255
 256         pit_type last_paste = pit + insertion.size() - 1;
 257
 258         // Store the new cursor position.
 259         pit = last_paste;
 260         pos = pars[last_paste].size();
 261
 262         // Join (conditionally) last pasted paragraph with next one, i.e.,
 263         // the tail of the spliced document paragraph
 264         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 265                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 266                         mergeParagraph(buffer.params(), pars, last_paste);
 267                 } else if (pars[last_paste + 1].empty()) {
 268                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 269                         mergeParagraph(buffer.params(), pars, last_paste);
 270                 } else if (pars[last_paste].empty()) {
 271                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 272                         mergeParagraph(buffer.params(), pars, last_paste);
 273                 } else {
 274                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 275                         ++last_paste;
 276                 }
 277         }
 278
 279         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 280 }
 281
 282
 283 PitPosPair eraseSelectionHelper(BufferParams const & params,
 284         ParagraphList & pars,
 285         pit_type startpit, pit_type endpit,
 286         int startpos, int endpos)
 287 {
 288         // Start of selection is really invalid.
 289         if (startpit == pit_type(pars.size()) ||
 290             (startpos > pars[startpit].size()))
 291                 return PitPosPair(endpit, endpos);
 292
 293         // Start and end is inside same paragraph
 294         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 295                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 296                 return PitPosPair(endpit, endpos);
 297         }
 298
 299         for (pit_type pit = startpit; pit != endpit + 1;) {
 300                 pos_type const left  = (pit == startpit ? startpos : 0);
 301                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 302                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 303
 304                 // Logically erase only, including the end-of-paragraph character
 305                 pars[pit].eraseChars(left, right, params.trackChanges);
 306
 307                 // Separate handling of paragraph break:
 308                 if (merge && pit != endpit &&
 309                     (pit + 1 != endpit || pars[pit].hasSameLayout(pars[endpit]))) {
 310                         if (pit + 1 == endpit)
 311                                 endpos += pars[pit].size();
 312                         mergeParagraph(params, pars, pit);
 313                         --endpit;
 314                 } else
 315                         ++pit;
 316         }
 317
 318         // Ensure legal cursor pos:
 319         endpit = startpit;
 320         endpos = startpos;
 321         return PitPosPair(endpit, endpos);
 322 }
 323
 324
 325 void putClipboard(ParagraphList const & paragraphs, TextClassPtr textclass,
 326                   docstring const & plaintext)
 327 {
 328         // For some strange reason gcc 3.2 and 3.3 do not accept
 329         // Buffer buffer(string(), false);
 330         Buffer buffer("", false);
 331         buffer.setUnnamed(true);
 332         buffer.paragraphs() = paragraphs;
 333         buffer.params().setTextClass(textclass);
 334         ostringstream lyx;
 335         if (buffer.write(lyx))
 336                 theClipboard().put(lyx.str(), plaintext);
 337         else
 338                 theClipboard().put(string(), plaintext);
 339 }
 340
 341
 342 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 343         pit_type startpit, pit_type endpit,
 344         int start, int end, TextClassPtr tc, CutStack & cutstack)
 345 {
 346         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 347         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 348         BOOST_ASSERT(startpit != endpit || start <= end);
 349
 350         // Clone the paragraphs within the selection.
 351         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 352                                 boost::next(pars.begin(), endpit + 1));
 353
 354         // Remove the end of the last paragraph; afterwards, remove the
 355         // beginning of the first paragraph. Keep this order - there may only
 356         // be one paragraph!  Do not track deletions here; this is an internal
 357         // action not visible to the user
 358
 359         Paragraph & back = copy_pars.back();
 360         back.eraseChars(end, back.size(), false);
 361         Paragraph & front = copy_pars.front();
 362         front.eraseChars(0, start, false);
 363
 364         ParagraphList::iterator it = copy_pars.begin();
 365         ParagraphList::iterator it_end = copy_pars.end();
 366
 367         for (; it != it_end; it++) {
 368                 // ERT paragraphs have the Language latex_language.
 369                 // This is invalid outside of ERT, so we need to change it
 370                 // to the buffer language.
 371                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 372                         it->changeLanguage(buf.params(), latex_language, buf.language());
 373                 }
 374                 it->setInsetOwner(0);
 375         }
 376
 377         // do not copy text (also nested in insets) which is marked as deleted
 378         acceptChanges(copy_pars, buf.params());
 379
 380         cutstack.push(make_pair(copy_pars, tc));
 381 }
 382
 383 } // namespace anon
 384
 385
 386
 387
 388 namespace cap {
 389
 390 docstring grabAndEraseSelection(Cursor & cur)
 391 {
 392         if (!cur.selection())
 393                 return docstring();
 394         docstring res = grabSelection(cur);
 395         eraseSelection(cur);
 396         return res;
 397 }
 398
 399
 400 void switchBetweenClasses(TextClassPtr const & c1,
 401         TextClassPtr const & c2, InsetText & in, ErrorList & errorlist)
 402 {
 403         errorlist.clear();
 404
 405         BOOST_ASSERT(!in.paragraphs().empty());
 406         if (c1 == c2)
 407                 return;
 408
 409         TextClass const & tclass1 = *c1;
 410         TextClass const & tclass2 = *c2;
 411
 412         // layouts
 413         ParIterator end = par_iterator_end(in);
 414         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 415                 docstring const name = it->layout()->name();
 416                 bool hasLayout = tclass2.hasLayout(name);
 417
 418                 if (hasLayout)
 419                         it->layout(tclass2[name]);
 420                 else
 421                         it->layout(tclass2.defaultLayout());
 422
 423                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 424                         docstring const s = bformat(
 425                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 426                                                 "because of class conversion from\n%3$s to %4$s"),
 427                          name, it->layout()->name(),
 428                          from_utf8(tclass1.name()), from_utf8(tclass2.name()));
 429                         // To warn the user that something had to be done.
 430                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 431                                                       it->id(), 0,
 432                                                       it->size()));
 433                 }
 434         }
 435
 436         // character styles
 437         InsetIterator const i_end = inset_iterator_end(in);
 438         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 439                 InsetCollapsable * inset = it->asInsetCollapsable();
 440                 if (!inset)
 441                         continue;
 442                 if (inset->lyxCode() != FLEX_CODE)
 443                         // FIXME: Should we verify all InsetCollapsable?
 444                         continue;
 445                 docstring const name = inset->name();
 446                 InsetLayout const & il = tclass2.insetlayout(name);
 447                 inset->setLayout(il);
 448                 if (il.labelstring != from_utf8("UNDEFINED"))
 449                         continue;
 450                 // The flex inset is undefined in tclass2
 451                 docstring const s = bformat(_(
 452                         "Flex inset %1$s is "
 453                         "undefined because of class "
 454                         "conversion from\n%2$s to %3$s"),
 455                         name, from_utf8(tclass1.name()),
 456                         from_utf8(tclass2.name()));
 457                 // To warn the user that something had to be done.
 458                 errorlist.push_back(ErrorItem(
 459                                 _("Undefined flex inset"),
 460                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 461         }
 462 }
 463
 464
 465 vector<docstring> const availableSelections(Buffer const & buffer)
 466 {
 467         vector<docstring> selList;
 468
 469         CutStack::const_iterator cit = theCuts.begin();
 470         CutStack::const_iterator end = theCuts.end();
 471         for (; cit != end; ++cit) {
 472                 // we do not use cit-> here because gcc 2.9x does not
 473                 // like it (JMarc)
 474                 ParagraphList const & pars = (*cit).first;
 475                 docstring asciiSel;
 476                 ParagraphList::const_iterator pit = pars.begin();
 477                 ParagraphList::const_iterator pend = pars.end();
 478                 for (; pit != pend; ++pit) {
 479                         asciiSel += pit->asString(buffer, false);
 480                         if (asciiSel.size() > 25) {
 481                                 asciiSel.replace(22, docstring::npos,
 482                                                  from_ascii("..."));
 483                                 break;
 484                         }
 485                 }
 486
 487                 selList.push_back(asciiSel);
 488         }
 489
 490         return selList;
 491 }
 492
 493
 494 size_type numberOfSelections()
 495 {
 496         return theCuts.size();
 497 }
 498
 499
 500 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 501 {
 502         // This doesn't make sense, if there is no selection
 503         if (!cur.selection())
 504                 return;
 505
 506         // OK, we have a selection. This is always between cur.selBegin()
 507         // and cur.selEnd()
 508
 509         if (cur.inTexted()) {
 510                 Text * text = cur.text();
 511                 BOOST_ASSERT(text);
 512
 513                 saveSelection(cur);
 514
 515                 // make sure that the depth behind the selection are restored, too
 516                 cur.recordUndoSelection();
 517                 pit_type begpit = cur.selBegin().pit();
 518                 pit_type endpit = cur.selEnd().pit();
 519
 520                 int endpos = cur.selEnd().pos();
 521
 522                 BufferParams const & bp = cur.buffer().params();
 523                 if (realcut) {
 524                         copySelectionHelper(cur.buffer(),
 525                                 text->paragraphs(),
 526                                 begpit, endpit,
 527                                 cur.selBegin().pos(), endpos,
 528                                 bp.getTextClassPtr(), theCuts);
 529                         // Stuff what we got on the clipboard.
 530                         // Even if there is no selection.
 531                         putClipboard(theCuts[0].first, theCuts[0].second,
 532                                 cur.selectionAsString(true));
 533                 }
 534
 535                 boost::tie(endpit, endpos) =
 536                         eraseSelectionHelper(bp,
 537                                 text->paragraphs(),
 538                                 begpit, endpit,
 539                                 cur.selBegin().pos(), endpos);
 540
 541                 // cutSelection can invalidate the cursor so we need to set
 542                 // it anew. (Lgb)
 543                 // we prefer the end for when tracking changes
 544                 cur.pos() = endpos;
 545                 cur.pit() = endpit;
 546
 547                 // sometimes necessary
 548                 if (doclear
 549                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 550                         cur.fixIfBroken();
 551
 552                 // need a valid cursor. (Lgb)
 553                 cur.clearSelection();
 554                 updateLabels(cur.buffer());
 555
 556                 // tell tabular that a recent copy happened
 557                 dirtyTabularStack(false);
 558         }
 559
 560         if (cur.inMathed()) {
 561                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 562                         // The current selection spans more than one cell.
 563                         // Record all cells
 564                         cur.recordUndoInset();
 565                 } else {
 566                         // Record only the current cell to avoid a jumping
 567                         // cursor after undo
 568                         cur.recordUndo();
 569                 }
 570                 if (realcut)
 571                         copySelection(cur);
 572                 eraseSelection(cur);
 573         }
 574 }
 575
 576
 577 void copySelection(Cursor & cur)
 578 {
 579         copySelection(cur, cur.selectionAsString(true));
 580 }
 581
 582
 583 namespace {
 584
 585 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 586 {
 587         // this doesn't make sense, if there is no selection
 588         if (!cur.selection())
 589                 return;
 590
 591         // copySelection can not yet handle the case of cross idx selection
 592         if (cur.selBegin().idx() != cur.selEnd().idx())
 593                 return;
 594
 595         if (cur.inTexted()) {
 596                 Text * text = cur.text();
 597                 BOOST_ASSERT(text);
 598                 // ok we have a selection. This is always between cur.selBegin()
 599                 // and sel_end cursor
 600
 601                 // copy behind a space if there is one
 602                 ParagraphList & pars = text->paragraphs();
 603                 pos_type pos = cur.selBegin().pos();
 604                 pit_type par = cur.selBegin().pit();
 605                 while (pos < pars[par].size() &&
 606                        pars[par].isLineSeparator(pos) &&
 607                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 608                         ++pos;
 609
 610                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 611                         pos, cur.selEnd().pos(),
 612                         cur.buffer().params().getTextClassPtr(), cutstack);
 613                 dirtyTabularStack(false);
 614         }
 615
 616         if (cur.inMathed()) {
 617                 //lyxerr << "copySelection in mathed" << endl;
 618                 ParagraphList pars;
 619                 Paragraph par;
 620                 BufferParams const & bp = cur.buffer().params();
 621                 par.layout(bp.getTextClass().defaultLayout());
 622                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 623                 pars.push_back(par);
 624                 cutstack.push(make_pair(pars, bp.getTextClassPtr()));
 625         }
 626 }
 627
 628 }
 629
 630
 631 void copySelectionToStack()
 632 {
 633         if (!selectionBuffer.empty())
 634                 theCuts.push(selectionBuffer[0]);
 635 }
 636
 637
 638 void copySelection(Cursor & cur, docstring const & plaintext)
 639 {
 640         // In tablemode, because copy and paste actually use special table stack
 641         // we do not attempt to get selected paragraphs under cursor. Instead, a
 642         // paragraph with the plain text version is generated so that table cells
 643         // can be pasted as pure text somewhere else.
 644         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 645                 ParagraphList pars;
 646                 Paragraph par;
 647                 BufferParams const & bp = cur.buffer().params();
 648                 par.layout(bp.getTextClass().defaultLayout());
 649                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 650                 pars.push_back(par);
 651                 theCuts.push(make_pair(pars, bp.getTextClassPtr()));
 652         } else {
 653                 copySelectionToStack(cur, theCuts);
 654         }
 655
 656         // stuff the selection onto the X clipboard, from an explicit copy request
 657         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 658 }
 659
 660
 661 void saveSelection(Cursor & cur)
 662 {
 663         // This function is called, not when a selection is formed, but when
 664         // a selection is cleared. Therefore, multiple keyboard selection
 665         // will not repeatively trigger this function (bug 3877).
 666         if (cur.selection()
 667             && cur.selBegin() == cur.bv().cursor().selBegin()
 668             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 669                 LYXERR(Debug::ACTION, "'" << cur.selectionAsString(true) << "'");
 670                 copySelectionToStack(cur, selectionBuffer);
 671         }
 672 }
 673
 674
 675 bool selection()
 676 {
 677         return !selectionBuffer.empty();
 678 }
 679
 680
 681 void clearSelection()
 682 {
 683         selectionBuffer.clear();
 684 }
 685
 686
 687 void clearCutStack()
 688 {
 689         theCuts.clear();
 690 }
 691
 692
 693 docstring getSelection(Buffer const & buf, size_t sel_index)
 694 {
 695         return sel_index < theCuts.size()
 696                 ? theCuts[sel_index].first.back().asString(buf, false)
 697                 : docstring();
 698 }
 699
 700
 701 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 702                         TextClassPtr textclass, ErrorList & errorList)
 703 {
 704         if (cur.inTexted()) {
 705                 Text * text = cur.text();
 706                 BOOST_ASSERT(text);
 707
 708                 pit_type endpit;
 709                 PitPosPair ppp;
 710
 711                 boost::tie(ppp, endpit) =
 712                         pasteSelectionHelper(cur, parlist,
 713                                              textclass, errorList);
 714                 updateLabels(cur.buffer());
 715                 cur.clearSelection();
 716                 text->setCursor(cur, ppp.first, ppp.second);
 717         }
 718
 719         // mathed is handled in InsetMathNest/InsetMathGrid
 720         BOOST_ASSERT(!cur.inMathed());
 721 }
 722
 723
 724 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 725 {
 726         // this does not make sense, if there is nothing to paste
 727         if (!checkPastePossible(sel_index))
 728                 return;
 729
 730         cur.recordUndo();
 731         pasteParagraphList(cur, theCuts[sel_index].first,
 732                            theCuts[sel_index].second, errorList);
 733         cur.setSelection();
 734 }
 735
 736
 737 void pasteClipboard(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 738 {
 739         // Use internal clipboard if it is the most recent one
 740         if (theClipboard().isInternal()) {
 741                 pasteFromStack(cur, errorList, 0);
 742                 return;
 743         }
 744
 745         // First try LyX format
 746         if (theClipboard().hasLyXContents()) {
 747                 string lyx = theClipboard().getAsLyX();
 748                 if (!lyx.empty()) {
 749                         // For some strange reason gcc 3.2 and 3.3 do not accept
 750                         // Buffer buffer(string(), false);
 751                         Buffer buffer("", false);
 752                         buffer.setUnnamed(true);
 753                         if (buffer.readString(lyx)) {
 754                                 cur.recordUndo();
 755                                 pasteParagraphList(cur, buffer.paragraphs(),
 756                                         buffer.params().getTextClassPtr(), errorList);
 757                                 cur.setSelection();
 758                                 return;
 759                         }
 760                 }
 761         }
 762
 763         // Then try plain text
 764         docstring const text = theClipboard().getAsText();
 765         if (text.empty())
 766                 return;
 767         cur.recordUndo();
 768         if (asParagraphs)
 769                 cur.text()->insertStringAsParagraphs(cur, text);
 770         else
 771                 cur.text()->insertStringAsLines(cur, text);
 772 }
 773
 774
 775 void pasteSelection(Cursor & cur, ErrorList & errorList)
 776 {
 777         if (selectionBuffer.empty())
 778                 return;
 779         cur.recordUndo();
 780         pasteParagraphList(cur, selectionBuffer[0].first,
 781                            selectionBuffer[0].second, errorList);
 782 }
 783
 784
 785 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 786 {
 787         cur.recordUndo();
 788         DocIterator selbeg = cur.selectionBegin();
 789
 790         // Get font setting before we cut
 791         Font const font =
 792                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 793
 794         // Insert the new string
 795         pos_type pos = cur.selEnd().pos();
 796         Paragraph & par = cur.selEnd().paragraph();
 797         docstring::const_iterator cit = str.begin();
 798         docstring::const_iterator end = str.end();
 799         for (; cit != end; ++cit, ++pos)
 800                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 801
 802         // Cut the selection
 803         cutSelection(cur, true, false);
 804
 805         // select the replacement
 806         if (backwards) {
 807                 selbeg.pos() += str.length();
 808                 cur.setSelection(selbeg, -int(str.length()));
 809         } else
 810                 cur.setSelection(selbeg, str.length());
 811 }
 812
 813
 814 void replaceSelection(Cursor & cur)
 815 {
 816         if (cur.selection())
 817                 cutSelection(cur, true, false);
 818 }
 819
 820
 821 void eraseSelection(Cursor & cur)
 822 {
 823         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 824         CursorSlice const & i1 = cur.selBegin();
 825         CursorSlice const & i2 = cur.selEnd();
 826         if (i1.inset().asInsetMath()) {
 827                 saveSelection(cur);
 828                 cur.top() = i1;
 829                 if (i1.idx() == i2.idx()) {
 830                         i1.cell().erase(i1.pos(), i2.pos());
 831                         // We may have deleted i1.cell(cur.pos()).
 832                         // Make sure that pos is valid.
 833                         if (cur.pos() > cur.lastpos())
 834                                 cur.pos() = cur.lastpos();
 835                 } else {
 836                         InsetMath * p = i1.asInsetMath();
 837                         Inset::row_type r1, r2;
 838                         Inset::col_type c1, c2;
 839                         region(i1, i2, r1, r2, c1, c2);
 840                         for (Inset::row_type row = r1; row <= r2; ++row)
 841                                 for (Inset::col_type col = c1; col <= c2; ++col)
 842                                         p->cell(p->index(row, col)).clear();
 843                         // We've deleted the whole cell. Only pos 0 is valid.
 844                         cur.pos() = 0;
 845                 }
 846                 // need a valid cursor. (Lgb)
 847                 cur.clearSelection();
 848         } else {
 849                 lyxerr << "can't erase this selection 1" << endl;
 850         }
 851         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 852 }
 853
 854
 855 void selDel(Cursor & cur)
 856 {
 857         //lyxerr << "cap::selDel" << endl;
 858         if (cur.selection())
 859                 eraseSelection(cur);
 860 }
 861
 862
 863 void selClearOrDel(Cursor & cur)
 864 {
 865         //lyxerr << "cap::selClearOrDel" << endl;
 866         if (lyxrc.auto_region_delete)
 867                 selDel(cur);
 868         else
 869                 cur.selection() = false;
 870 }
 871
 872
 873 docstring grabSelection(Cursor const & cur)
 874 {
 875         if (!cur.selection())
 876                 return docstring();
 877
 878         // FIXME: What is wrong with the following?
 879 #if 0
 880         ostringstream os;
 881         for (DocIterator dit = cur.selectionBegin();
 882              dit != cur.selectionEnd(); dit.forwardPos())
 883                 os << asString(dit.cell());
 884         return os.str();
 885 #endif
 886
 887         CursorSlice i1 = cur.selBegin();
 888         CursorSlice i2 = cur.selEnd();
 889
 890         if (i1.idx() == i2.idx()) {
 891                 if (i1.inset().asInsetMath()) {
 892                         MathData::const_iterator it = i1.cell().begin();
 893                         return asString(MathData(it + i1.pos(), it + i2.pos()));
 894                 } else {
 895                         return from_ascii("unknown selection 1");
 896                 }
 897         }
 898
 899         Inset::row_type r1, r2;
 900         Inset::col_type c1, c2;
 901         region(i1, i2, r1, r2, c1, c2);
 902
 903         docstring data;
 904         if (i1.inset().asInsetMath()) {
 905                 for (Inset::row_type row = r1; row <= r2; ++row) {
 906                         if (row > r1)
 907                                 data += "\\\\";
 908                         for (Inset::col_type col = c1; col <= c2; ++col) {
 909                                 if (col > c1)
 910                                         data += '&';
 911                                 data += asString(i1.asInsetMath()->
 912                                         cell(i1.asInsetMath()->index(row, col)));
 913                         }
 914                 }
 915         } else {
 916                 data = from_ascii("unknown selection 2");
 917         }
 918         return data;
 919 }
 920
 921
 922 void dirtyTabularStack(bool b)
 923 {
 924         dirty_tabular_stack_ = b;
 925 }
 926
 927
 928 bool tabularStackDirty()
 929 {
 930         return dirty_tabular_stack_;
 931 }
 932
 933
 934 } // namespace cap
 935
 936 } // namespace lyx