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 "debug.h"
  25 #include "ErrorList.h"
  26 #include "FuncRequest.h"
  27 #include "gettext.h"
  28 #include "InsetIterator.h"
  29 #include "InsetList.h"
  30 #include "Language.h"
  31 #include "lfuns.h"
  32 #include "LyXFunc.h"
  33 #include "LyXRC.h"
  34 #include "Text.h"
  35 #include "TextClassList.h"
  36 #include "Paragraph.h"
  37 #include "paragraph_funcs.h"
  38 #include "ParagraphParameters.h"
  39 #include "ParIterator.h"
  40 #include "Undo.h"
  41
  42 #include "insets/InsetFlex.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/limited_stack.h"
  50 #include "support/lstrings.h"
  51 #include "support/docstream.h"
  52
  53 #include "frontends/Clipboard.h"
  54 #include "frontends/Selection.h"
  55
  56 #include <boost/current_function.hpp>
  57 #include <boost/tuple/tuple.hpp>
  58 #include <boost/next_prior.hpp>
  59
  60 #include <string>
  61
  62 using std::endl;
  63 using std::for_each;
  64 using std::make_pair;
  65 using std::pair;
  66 using std::vector;
  67 using std::string;
  68
  69
  70 namespace lyx {
  71
  72 using support::bformat;
  73 using frontend::Clipboard;
  74
  75 namespace {
  76
  77 typedef std::pair<pit_type, int> PitPosPair;
  78
  79 typedef limited_stack<pair<ParagraphList, TextClassPtr> > CutStack;
  80
  81 CutStack theCuts(10);
  82 // persistent selection, cleared until the next selection
  83 CutStack selectionBuffer(1);
  84
  85 // store whether the tabular stack is newer than the normal copy stack
  86 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  87 // when we (hopefully) have a one-for-all paste mechanism.
  88 bool dirty_tabular_stack_ = false;
  89
  90
  91 void region(CursorSlice const & i1, CursorSlice const & i2,
  92         Inset::row_type & r1, Inset::row_type & r2,
  93         Inset::col_type & c1, Inset::col_type & c2)
  94 {
  95         Inset & p = i1.inset();
  96         c1 = p.col(i1.idx());
  97         c2 = p.col(i2.idx());
  98         if (c1 > c2)
  99                 std::swap(c1, c2);
 100         r1 = p.row(i1.idx());
 101         r2 = p.row(i2.idx());
 102         if (r1 > r2)
 103                 std::swap(r1, r2);
 104 }
 105
 106
 107 bool checkPastePossible(int index)
 108 {
 109         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 110 }
 111
 112
 113 pair<PitPosPair, pit_type>
 114 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 115                      TextClassPtr textclass, ErrorList & errorlist)
 116 {
 117         Buffer const & buffer = cur.buffer();
 118         pit_type pit = cur.pit();
 119         pos_type pos = cur.pos();
 120         ParagraphList & pars = cur.text()->paragraphs();
 121
 122         if (parlist.empty())
 123                 return make_pair(PitPosPair(pit, pos), pit);
 124
 125         BOOST_ASSERT (pos <= pars[pit].size());
 126
 127         // Make a copy of the CaP paragraphs.
 128         ParagraphList insertion = parlist;
 129         TextClassPtr const tc = buffer.params().getTextClassPtr();
 130
 131         // Now remove all out of the pars which is NOT allowed in the
 132         // new environment and set also another font if that is required.
 133
 134         // Convert newline to paragraph break in ERT inset.
 135         // This should not be here!
 136         if (pars[pit].inInset() &&
 137             (pars[pit].inInset()->lyxCode() == ERT_CODE ||
 138                 pars[pit].inInset()->lyxCode() == LISTINGS_CODE)) {
 139                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 140                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 141                                 if (insertion[i].isNewline(j)) {
 142                                         // do not track deletion of newline
 143                                         insertion[i].eraseChar(j, false);
 144                                         breakParagraphConservative(
 145                                                         buffer.params(),
 146                                                         insertion, i, j);
 147                                 }
 148                         }
 149                 }
 150         }
 151
 152         // If we are in an inset which returns forceDefaultParagraphs,
 153         // set the paragraphs to default
 154         if (cur.inset().forceDefaultParagraphs(cur.idx())) {
 155                 LayoutPtr const layout =
 156                         buffer.params().getTextClass().defaultLayout();
 157                 ParagraphList::iterator const end = insertion.end();
 158                 for (ParagraphList::iterator par = insertion.begin();
 159                                 par != end; ++par)
 160                         par->layout(layout);
 161         }
 162
 163         // Make sure there is no class difference.
 164         InsetText in;
 165         // This works without copying any paragraph data because we have
 166         // a specialized swap method for ParagraphList. This is important
 167         // since we store pointers to insets at some places and we don't
 168         // want to invalidate them.
 169         insertion.swap(in.paragraphs());
 170         cap::switchBetweenClasses(textclass, tc, in, errorlist);
 171         insertion.swap(in.paragraphs());
 172
 173         ParagraphList::iterator tmpbuf = insertion.begin();
 174         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 175
 176         depth_type max_depth = pars[pit].getMaxDepthAfter();
 177
 178         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 179                 // If we have a negative jump so that the depth would
 180                 // go below 0 depth then we have to redo the delta to
 181                 // this new max depth level so that subsequent
 182                 // paragraphs are aligned correctly to this paragraph
 183                 // at level 0.
 184                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 185                         depth_delta = 0;
 186
 187                 // Set the right depth so that we are not too deep or shallow.
 188                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 189                 if (tmpbuf->params().depth() > max_depth)
 190                         tmpbuf->params().depth(max_depth);
 191
 192                 // Only set this from the 2nd on as the 2nd depends
 193                 // for maxDepth still on pit.
 194                 if (tmpbuf != insertion.begin())
 195                         max_depth = tmpbuf->getMaxDepthAfter();
 196
 197                 // Set the inset owner of this paragraph.
 198                 tmpbuf->setInsetOwner(pars[pit].inInset());
 199                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 200                         if (tmpbuf->isInset(i) &&
 201                             !pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 202                                 // do not track deletion of invalid insets
 203                                 tmpbuf->eraseChar(i--, false);
 204                 }
 205
 206                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 207                                          Change::INSERTED : Change::UNCHANGED));
 208         }
 209
 210         bool const empty = pars[pit].empty();
 211         if (!empty) {
 212                 // Make the buf exactly the same layout as the cursor
 213                 // paragraph.
 214                 insertion.begin()->makeSameLayout(pars[pit]);
 215         }
 216
 217         // Prepare the paragraphs and insets for insertion.
 218         // A couple of insets store buffer references so need updating.
 219         insertion.swap(in.paragraphs());
 220
 221         ParIterator fpit = par_iterator_begin(in);
 222         ParIterator fend = par_iterator_end(in);
 223
 224         for (; fpit != fend; ++fpit) {
 225                 InsetList::const_iterator lit = fpit->insetList().begin();
 226                 InsetList::const_iterator eit = fpit->insetList().end();
 227
 228                 for (; lit != eit; ++lit) {
 229                         switch (lit->inset->lyxCode()) {
 230                         case TABULAR_CODE: {
 231                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 232                                 it->buffer(&buffer);
 233                                 break;
 234                         }
 235
 236                         default:
 237                                 break; // nothing
 238                         }
 239                 }
 240         }
 241         insertion.swap(in.paragraphs());
 242
 243         // Split the paragraph for inserting the buf if necessary.
 244         if (!empty)
 245                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 246
 247         // Paste it!
 248         if (empty) {
 249                 pars.insert(boost::next(pars.begin(), pit),
 250                             insertion.begin(),
 251                             insertion.end());
 252
 253                 // merge the empty par with the last par of the insertion
 254                 mergeParagraph(buffer.params(), pars,
 255                                pit + insertion.size() - 1);
 256         } else {
 257                 pars.insert(boost::next(pars.begin(), pit + 1),
 258                             insertion.begin(),
 259                             insertion.end());
 260
 261                 // merge the first par of the insertion with the current par
 262                 mergeParagraph(buffer.params(), pars, pit);
 263         }
 264
 265         pit_type last_paste = pit + insertion.size() - 1;
 266
 267         // Store the new cursor position.
 268         pit = last_paste;
 269         pos = pars[last_paste].size();
 270
 271         // Join (conditionally) last pasted paragraph with next one, i.e.,
 272         // the tail of the spliced document paragraph
 273         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 274                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 275                         mergeParagraph(buffer.params(), pars, last_paste);
 276                 } else if (pars[last_paste + 1].empty()) {
 277                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 278                         mergeParagraph(buffer.params(), pars, last_paste);
 279                 } else if (pars[last_paste].empty()) {
 280                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 281                         mergeParagraph(buffer.params(), pars, last_paste);
 282                 } else {
 283                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 284                         ++last_paste;
 285                 }
 286         }
 287
 288         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 289 }
 290
 291
 292 PitPosPair eraseSelectionHelper(BufferParams const & params,
 293         ParagraphList & pars,
 294         pit_type startpit, pit_type endpit,
 295         int startpos, int endpos)
 296 {
 297         // Start of selection is really invalid.
 298         if (startpit == pit_type(pars.size()) ||
 299             (startpos > pars[startpit].size()))
 300                 return PitPosPair(endpit, endpos);
 301
 302         // Start and end is inside same paragraph
 303         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 304                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 305                 return PitPosPair(endpit, endpos);
 306         }
 307
 308         for (pit_type pit = startpit; pit != endpit + 1;) {
 309                 pos_type const left  = (pit == startpit ? startpos : 0);
 310                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 311                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 312
 313                 // Logically erase only, including the end-of-paragraph character
 314                 pars[pit].eraseChars(left, right, params.trackChanges);
 315
 316                 // Separate handling of paragraph break:
 317                 if (merge && pit != endpit &&
 318                     (pit + 1 != endpit || pars[pit].hasSameLayout(pars[endpit]))) {
 319                         if (pit + 1 == endpit)
 320                                 endpos += pars[pit].size();
 321                         mergeParagraph(params, pars, pit);
 322                         --endpit;
 323                 } else
 324                         ++pit;
 325         }
 326
 327         // Ensure legal cursor pos:
 328         endpit = startpit;
 329         endpos = startpos;
 330         return PitPosPair(endpit, endpos);
 331 }
 332
 333
 334 void putClipboard(ParagraphList const & paragraphs, TextClassPtr textclass,
 335                   docstring const & plaintext)
 336 {
 337         // For some strange reason gcc 3.2 and 3.3 do not accept
 338         // Buffer buffer(string(), false);
 339         Buffer buffer("", false);
 340         buffer.setUnnamed(true);
 341         buffer.paragraphs() = paragraphs;
 342         buffer.params().setTextClass(textclass);
 343         std::ostringstream lyx;
 344         if (buffer.write(lyx))
 345                 theClipboard().put(lyx.str(), plaintext);
 346         else
 347                 theClipboard().put(string(), plaintext);
 348 }
 349
 350
 351 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 352         pit_type startpit, pit_type endpit,
 353         int start, int end, TextClassPtr tc, CutStack & cutstack)
 354 {
 355         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 356         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 357         BOOST_ASSERT(startpit != endpit || start <= end);
 358
 359         // Clone the paragraphs within the selection.
 360         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 361                                 boost::next(pars.begin(), endpit + 1));
 362
 363         // Remove the end of the last paragraph; afterwards, remove the
 364         // beginning of the first paragraph. Keep this order - there may only
 365         // be one paragraph!  Do not track deletions here; this is an internal
 366         // action not visible to the user
 367
 368         Paragraph & back = copy_pars.back();
 369         back.eraseChars(end, back.size(), false);
 370         Paragraph & front = copy_pars.front();
 371         front.eraseChars(0, start, false);
 372
 373         ParagraphList::iterator it = copy_pars.begin();
 374         ParagraphList::iterator it_end = copy_pars.end();
 375
 376         for (; it != it_end; it++) {
 377                 // ERT paragraphs have the Language latex_language.
 378                 // This is invalid outside of ERT, so we need to change it
 379                 // to the buffer language.
 380                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 381                         it->changeLanguage(buf.params(), latex_language, buf.language());
 382                 }
 383                 it->setInsetOwner(0);
 384         }
 385
 386         // do not copy text (also nested in insets) which is marked as deleted
 387         acceptChanges(copy_pars, buf.params());
 388
 389         cutstack.push(make_pair(copy_pars, tc));
 390 }
 391
 392 } // namespace anon
 393
 394
 395
 396
 397 namespace cap {
 398
 399 docstring grabAndEraseSelection(Cursor & cur)
 400 {
 401         if (!cur.selection())
 402                 return docstring();
 403         docstring res = grabSelection(cur);
 404         eraseSelection(cur);
 405         return res;
 406 }
 407
 408
 409 void switchBetweenClasses(TextClassPtr const & c1,
 410         TextClassPtr const & c2, InsetText & in, ErrorList & errorlist)
 411 {
 412         errorlist.clear();
 413
 414         BOOST_ASSERT(!in.paragraphs().empty());
 415         if (c1 == c2)
 416                 return;
 417
 418         TextClass const & tclass1 = *c1;
 419         TextClass const & tclass2 = *c2;
 420
 421         // layouts
 422         ParIterator end = par_iterator_end(in);
 423         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 424                 docstring const name = it->layout()->name();
 425                 bool hasLayout = tclass2.hasLayout(name);
 426
 427                 if (hasLayout)
 428                         it->layout(tclass2[name]);
 429                 else
 430                         it->layout(tclass2.defaultLayout());
 431
 432                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 433                         docstring const s = bformat(
 434                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 435                                                 "because of class conversion from\n%3$s to %4$s"),
 436                          name, it->layout()->name(),
 437                          from_utf8(tclass1.name()), from_utf8(tclass2.name()));
 438                         // To warn the user that something had to be done.
 439                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 440                                                       it->id(), 0,
 441                                                       it->size()));
 442                 }
 443         }
 444
 445         // character styles
 446         InsetIterator const i_end = inset_iterator_end(in);
 447         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 448                 InsetCollapsable * inset = it->asInsetCollapsable();
 449                 if (!inset)
 450                         continue;
 451                 if (inset->lyxCode() != FLEX_CODE)
 452                         // FIXME: Should we verify all InsetCollapsable?
 453                         continue;
 454                 docstring const name = inset->name();
 455                 InsetLayout const & il = tclass2.insetlayout(name);
 456                 inset->setLayout(il);
 457                 if (il.labelstring != from_utf8("UNDEFINED"))
 458                         continue;
 459                 // The flex inset is undefined in tclass2
 460                 docstring const s = bformat(_(
 461                         "Flex inset %1$s is "
 462                         "undefined because of class "
 463                         "conversion from\n%2$s to %3$s"),
 464                         name, from_utf8(tclass1.name()),
 465                         from_utf8(tclass2.name()));
 466                 // To warn the user that something had to be done.
 467                 errorlist.push_back(ErrorItem(
 468                                 _("Undefined flex inset"),
 469                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 470         }
 471 }
 472
 473
 474 std::vector<docstring> const availableSelections(Buffer const & buffer)
 475 {
 476         vector<docstring> selList;
 477
 478         CutStack::const_iterator cit = theCuts.begin();
 479         CutStack::const_iterator end = theCuts.end();
 480         for (; cit != end; ++cit) {
 481                 // we do not use cit-> here because gcc 2.9x does not
 482                 // like it (JMarc)
 483                 ParagraphList const & pars = (*cit).first;
 484                 docstring asciiSel;
 485                 ParagraphList::const_iterator pit = pars.begin();
 486                 ParagraphList::const_iterator pend = pars.end();
 487                 for (; pit != pend; ++pit) {
 488                         asciiSel += pit->asString(buffer, false);
 489                         if (asciiSel.size() > 25) {
 490                                 asciiSel.replace(22, docstring::npos,
 491                                                  from_ascii("..."));
 492                                 break;
 493                         }
 494                 }
 495
 496                 selList.push_back(asciiSel);
 497         }
 498
 499         return selList;
 500 }
 501
 502
 503 size_type numberOfSelections()
 504 {
 505         return theCuts.size();
 506 }
 507
 508
 509 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 510 {
 511         // This doesn't make sense, if there is no selection
 512         if (!cur.selection())
 513                 return;
 514
 515         // OK, we have a selection. This is always between cur.selBegin()
 516         // and cur.selEnd()
 517
 518         if (cur.inTexted()) {
 519                 Text * text = cur.text();
 520                 BOOST_ASSERT(text);
 521
 522                 saveSelection(cur);
 523
 524                 // make sure that the depth behind the selection are restored, too
 525                 cur.recordUndoSelection();
 526                 pit_type begpit = cur.selBegin().pit();
 527                 pit_type endpit = cur.selEnd().pit();
 528
 529                 int endpos = cur.selEnd().pos();
 530
 531                 BufferParams const & bp = cur.buffer().params();
 532                 if (realcut) {
 533                         copySelectionHelper(cur.buffer(),
 534                                 text->paragraphs(),
 535                                 begpit, endpit,
 536                                 cur.selBegin().pos(), endpos,
 537                                 bp.getTextClassPtr(), theCuts);
 538                         // Stuff what we got on the clipboard.
 539                         // Even if there is no selection.
 540                         putClipboard(theCuts[0].first, theCuts[0].second,
 541                                 cur.selectionAsString(true));
 542                 }
 543
 544                 boost::tie(endpit, endpos) =
 545                         eraseSelectionHelper(bp,
 546                                 text->paragraphs(),
 547                                 begpit, endpit,
 548                                 cur.selBegin().pos(), endpos);
 549
 550                 // cutSelection can invalidate the cursor so we need to set
 551                 // it anew. (Lgb)
 552                 // we prefer the end for when tracking changes
 553                 cur.pos() = endpos;
 554                 cur.pit() = endpit;
 555
 556                 // sometimes necessary
 557                 if (doclear
 558                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 559                         cur.fixIfBroken();
 560
 561                 // need a valid cursor. (Lgb)
 562                 cur.clearSelection();
 563                 updateLabels(cur.buffer());
 564
 565                 // tell tabular that a recent copy happened
 566                 dirtyTabularStack(false);
 567         }
 568
 569         if (cur.inMathed()) {
 570                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 571                         // The current selection spans more than one cell.
 572                         // Record all cells
 573                         cur.recordUndoInset();
 574                 } else {
 575                         // Record only the current cell to avoid a jumping
 576                         // cursor after undo
 577                         cur.recordUndo();
 578                 }
 579                 if (realcut)
 580                         copySelection(cur);
 581                 eraseSelection(cur);
 582         }
 583 }
 584
 585
 586 void copySelection(Cursor & cur)
 587 {
 588         copySelection(cur, cur.selectionAsString(true));
 589 }
 590
 591
 592 namespace {
 593
 594 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 595 {
 596         // this doesn't make sense, if there is no selection
 597         if (!cur.selection())
 598                 return;
 599
 600         // copySelection can not yet handle the case of cross idx selection
 601         if (cur.selBegin().idx() != cur.selEnd().idx())
 602                 return;
 603
 604         if (cur.inTexted()) {
 605                 Text * text = cur.text();
 606                 BOOST_ASSERT(text);
 607                 // ok we have a selection. This is always between cur.selBegin()
 608                 // and sel_end cursor
 609
 610                 // copy behind a space if there is one
 611                 ParagraphList & pars = text->paragraphs();
 612                 pos_type pos = cur.selBegin().pos();
 613                 pit_type par = cur.selBegin().pit();
 614                 while (pos < pars[par].size() &&
 615                        pars[par].isLineSeparator(pos) &&
 616                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 617                         ++pos;
 618
 619                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 620                         pos, cur.selEnd().pos(),
 621                         cur.buffer().params().getTextClassPtr(), cutstack);
 622                 dirtyTabularStack(false);
 623         }
 624
 625         if (cur.inMathed()) {
 626                 //lyxerr << "copySelection in mathed" << endl;
 627                 ParagraphList pars;
 628                 Paragraph par;
 629                 BufferParams const & bp = cur.buffer().params();
 630                 par.layout(bp.getTextClass().defaultLayout());
 631                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 632                 pars.push_back(par);
 633                 cutstack.push(make_pair(pars, bp.getTextClassPtr()));
 634         }
 635 }
 636
 637 }
 638
 639
 640 void copySelectionToStack()
 641 {
 642         if (!selectionBuffer.empty())
 643                 theCuts.push(selectionBuffer[0]);
 644 }
 645
 646
 647 void copySelection(Cursor & cur, docstring const & plaintext)
 648 {
 649         // In tablemode, because copy and paste actually use special table stack
 650         // we do not attemp to get selected paragraphs under cursor. Instead, a
 651         // paragraph with the plain text version is generated so that table cells
 652         // can be pasted as pure text somewhere else.
 653         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 654                 ParagraphList pars;
 655                 Paragraph par;
 656                 BufferParams const & bp = cur.buffer().params();
 657                 par.layout(bp.getTextClass().defaultLayout());
 658                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 659                 pars.push_back(par);
 660                 theCuts.push(make_pair(pars, bp.getTextClassPtr()));
 661         } else
 662                 copySelectionToStack(cur, theCuts);
 663
 664         // stuff the selection onto the X clipboard, from an explicit copy request
 665         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 666 }
 667
 668
 669 void saveSelection(Cursor & cur)
 670 {
 671         // This function is called, not when a selection is formed, but when
 672         // a selection is cleared. Therefore, multiple keyboard selection
 673         // will not repeatively trigger this function (bug 3877).
 674         if (cur.selection()
 675             && cur.selBegin() == cur.bv().cursor().selBegin()
 676             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 677                 LYXERR(Debug::ACTION, BOOST_CURRENT_FUNCTION << ": `"
 678                            << to_utf8(cur.selectionAsString(true)) << "'.");
 679                 copySelectionToStack(cur, selectionBuffer);
 680         }
 681 }
 682
 683
 684 bool selection()
 685 {
 686         return !selectionBuffer.empty();
 687 }
 688
 689
 690 void clearSelection()
 691 {
 692         selectionBuffer.clear();
 693 }
 694
 695
 696 void clearCutStack()
 697 {
 698         theCuts.clear();
 699 }
 700
 701
 702 docstring getSelection(Buffer const & buf, size_t sel_index)
 703 {
 704         return sel_index < theCuts.size()
 705                 ? theCuts[sel_index].first.back().asString(buf, false)
 706                 : docstring();
 707 }
 708
 709
 710 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 711                         TextClassPtr textclass, ErrorList & errorList)
 712 {
 713         if (cur.inTexted()) {
 714                 Text * text = cur.text();
 715                 BOOST_ASSERT(text);
 716
 717                 pit_type endpit;
 718                 PitPosPair ppp;
 719
 720                 boost::tie(ppp, endpit) =
 721                         pasteSelectionHelper(cur, parlist,
 722                                              textclass, errorList);
 723                 updateLabels(cur.buffer());
 724                 cur.clearSelection();
 725                 text->setCursor(cur, ppp.first, ppp.second);
 726         }
 727
 728         // mathed is handled in InsetMathNest/InsetMathGrid
 729         BOOST_ASSERT(!cur.inMathed());
 730 }
 731
 732
 733 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 734 {
 735         // this does not make sense, if there is nothing to paste
 736         if (!checkPastePossible(sel_index))
 737                 return;
 738
 739         cur.recordUndo();
 740         pasteParagraphList(cur, theCuts[sel_index].first,
 741                            theCuts[sel_index].second, errorList);
 742         cur.setSelection();
 743 }
 744
 745
 746 void pasteClipboard(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 747 {
 748         // Use internal clipboard if it is the most recent one
 749         if (theClipboard().isInternal()) {
 750                 pasteFromStack(cur, errorList, 0);
 751                 return;
 752         }
 753
 754         // First try LyX format
 755         if (theClipboard().hasLyXContents()) {
 756                 string lyx = theClipboard().getAsLyX();
 757                 if (!lyx.empty()) {
 758                         // For some strange reason gcc 3.2 and 3.3 do not accept
 759                         // Buffer buffer(string(), false);
 760                         Buffer buffer("", false);
 761                         buffer.setUnnamed(true);
 762                         if (buffer.readString(lyx)) {
 763                                 cur.recordUndo();
 764                                 pasteParagraphList(cur, buffer.paragraphs(),
 765                                         buffer.params().getTextClassPtr(), errorList);
 766                                 cur.setSelection();
 767                                 return;
 768                         }
 769                 }
 770         }
 771
 772         // Then try plain text
 773         docstring const text = theClipboard().getAsText();
 774         if (text.empty())
 775                 return;
 776         cur.recordUndo();
 777         if (asParagraphs)
 778                 cur.text()->insertStringAsParagraphs(cur, text);
 779         else
 780                 cur.text()->insertStringAsLines(cur, text);
 781 }
 782
 783
 784 void pasteSelection(Cursor & cur, ErrorList & errorList)
 785 {
 786         if (selectionBuffer.empty())
 787                 return;
 788         cur.recordUndo();
 789         pasteParagraphList(cur, selectionBuffer[0].first,
 790                            selectionBuffer[0].second, errorList);
 791 }
 792
 793
 794 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 795 {
 796         cur.recordUndo();
 797         DocIterator selbeg = cur.selectionBegin();
 798
 799         // Get font setting before we cut
 800         Font const font =
 801                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 802
 803         // Insert the new string
 804         pos_type pos = cur.selEnd().pos();
 805         Paragraph & par = cur.selEnd().paragraph();
 806         docstring::const_iterator cit = str.begin();
 807         docstring::const_iterator end = str.end();
 808         for (; cit != end; ++cit, ++pos)
 809                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 810
 811         // Cut the selection
 812         cutSelection(cur, true, false);
 813
 814         // select the replacement
 815         if (backwards) {
 816                 selbeg.pos() += str.length();
 817                 cur.setSelection(selbeg, -int(str.length()));
 818         } else
 819                 cur.setSelection(selbeg, str.length());
 820 }
 821
 822
 823 void replaceSelection(Cursor & cur)
 824 {
 825         if (cur.selection())
 826                 cutSelection(cur, true, false);
 827 }
 828
 829
 830 void eraseSelection(Cursor & cur)
 831 {
 832         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 833         CursorSlice const & i1 = cur.selBegin();
 834         CursorSlice const & i2 = cur.selEnd();
 835         if (i1.inset().asInsetMath()) {
 836                 saveSelection(cur);
 837                 cur.top() = i1;
 838                 if (i1.idx() == i2.idx()) {
 839                         i1.cell().erase(i1.pos(), i2.pos());
 840                         // We may have deleted i1.cell(cur.pos()).
 841                         // Make sure that pos is valid.
 842                         if (cur.pos() > cur.lastpos())
 843                                 cur.pos() = cur.lastpos();
 844                 } else {
 845                         InsetMath * p = i1.asInsetMath();
 846                         Inset::row_type r1, r2;
 847                         Inset::col_type c1, c2;
 848                         region(i1, i2, r1, r2, c1, c2);
 849                         for (Inset::row_type row = r1; row <= r2; ++row)
 850                                 for (Inset::col_type col = c1; col <= c2; ++col)
 851                                         p->cell(p->index(row, col)).clear();
 852                         // We've deleted the whole cell. Only pos 0 is valid.
 853                         cur.pos() = 0;
 854                 }
 855                 // need a valid cursor. (Lgb)
 856                 cur.clearSelection();
 857         } else {
 858                 lyxerr << "can't erase this selection 1" << endl;
 859         }
 860         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 861 }
 862
 863
 864 void selDel(Cursor & cur)
 865 {
 866         //lyxerr << "cap::selDel" << endl;
 867         if (cur.selection())
 868                 eraseSelection(cur);
 869 }
 870
 871
 872 void selClearOrDel(Cursor & cur)
 873 {
 874         //lyxerr << "cap::selClearOrDel" << endl;
 875         if (lyxrc.auto_region_delete)
 876                 selDel(cur);
 877         else
 878                 cur.selection() = false;
 879 }
 880
 881
 882 docstring grabSelection(Cursor const & cur)
 883 {
 884         if (!cur.selection())
 885                 return docstring();
 886
 887         // FIXME: What is wrong with the following?
 888 #if 0
 889         std::ostringstream os;
 890         for (DocIterator dit = cur.selectionBegin();
 891              dit != cur.selectionEnd(); dit.forwardPos())
 892                 os << asString(dit.cell());
 893         return os.str();
 894 #endif
 895
 896         CursorSlice i1 = cur.selBegin();
 897         CursorSlice i2 = cur.selEnd();
 898
 899         if (i1.idx() == i2.idx()) {
 900                 if (i1.inset().asInsetMath()) {
 901                         MathData::const_iterator it = i1.cell().begin();
 902                         return asString(MathData(it + i1.pos(), it + i2.pos()));
 903                 } else {
 904                         return from_ascii("unknown selection 1");
 905                 }
 906         }
 907
 908         Inset::row_type r1, r2;
 909         Inset::col_type c1, c2;
 910         region(i1, i2, r1, r2, c1, c2);
 911
 912         docstring data;
 913         if (i1.inset().asInsetMath()) {
 914                 for (Inset::row_type row = r1; row <= r2; ++row) {
 915                         if (row > r1)
 916                                 data += "\\\\";
 917                         for (Inset::col_type col = c1; col <= c2; ++col) {
 918                                 if (col > c1)
 919                                         data += '&';
 920                                 data += asString(i1.asInsetMath()->
 921                                         cell(i1.asInsetMath()->index(row, col)));
 922                         }
 923                 }
 924         } else {
 925                 data = from_ascii("unknown selection 2");
 926         }
 927         return data;
 928 }
 929
 930
 931 void dirtyTabularStack(bool b)
 932 {
 933         dirty_tabular_stack_ = b;
 934 }
 935
 936
 937 bool tabularStackDirty()
 938 {
 939         return dirty_tabular_stack_;
 940 }
 941
 942
 943 } // namespace cap
 944
 945 } // namespace lyx