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 "Cursor.h"
  23 #include "debug.h"
  24 #include "ErrorList.h"
  25 #include "FuncRequest.h"
  26 #include "gettext.h"
  27 #include "InsetIterator.h"
  28 #include "Language.h"
  29 #include "lfuns.h"
  30 #include "LyXFunc.h"
  31 #include "LyXRC.h"
  32 #include "Text.h"
  33 #include "TextClass_ptr.h"
  34 #include "TextClassList.h"
  35 #include "Paragraph.h"
  36 #include "paragraph_funcs.h"
  37 #include "ParagraphParameters.h"
  38 #include "ParIterator.h"
  39 #include "Undo.h"
  40
  41 #include "insets/InsetFlex.h"
  42 #include "insets/InsetTabular.h"
  43
  44 #include "mathed/MathData.h"
  45 #include "mathed/InsetMath.h"
  46 #include "mathed/MathSupport.h"
  47
  48 #include "support/lstrings.h"
  49
  50 #include "frontends/Clipboard.h"
  51 #include "frontends/Selection.h"
  52
  53 #include <boost/current_function.hpp>
  54 #include <boost/tuple/tuple.hpp>
  55
  56 #include <string>
  57
  58 using std::endl;
  59 using std::for_each;
  60 using std::make_pair;
  61 using std::pair;
  62 using std::vector;
  63 using std::string;
  64
  65
  66 namespace lyx {
  67
  68 using support::bformat;
  69 using frontend::Clipboard;
  70
  71 namespace {
  72
  73 typedef std::pair<pit_type, int> PitPosPair;
  74
  75 typedef limited_stack<pair<ParagraphList, TextClass_ptr> > CutStack;
  76
  77 CutStack theCuts(10);
  78 // persistent selection, cleared until the next selection
  79 CutStack selectionBuffer(1);
  80
  81 // store whether the tabular stack is newer than the normal copy stack
  82 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  83 // when we (hopefully) have a one-for-all paste mechanism.
  84 bool dirty_tabular_stack_ = false;
  85
  86
  87 void region(CursorSlice const & i1, CursorSlice const & i2,
  88         Inset::row_type & r1, Inset::row_type & r2,
  89         Inset::col_type & c1, Inset::col_type & c2)
  90 {
  91         Inset & p = i1.inset();
  92         c1 = p.col(i1.idx());
  93         c2 = p.col(i2.idx());
  94         if (c1 > c2)
  95                 std::swap(c1, c2);
  96         r1 = p.row(i1.idx());
  97         r2 = p.row(i2.idx());
  98         if (r1 > r2)
  99                 std::swap(r1, r2);
 100 }
 101
 102
 103 bool checkPastePossible(int index)
 104 {
 105         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 106 }
 107
 108
 109 pair<PitPosPair, pit_type>
 110 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 111                      TextClass_ptr textclass, ErrorList & errorlist)
 112 {
 113         Buffer const & buffer = cur.buffer();
 114         pit_type pit = cur.pit();
 115         pos_type pos = cur.pos();
 116         ParagraphList & pars = cur.text()->paragraphs();
 117
 118         if (parlist.empty())
 119                 return make_pair(PitPosPair(pit, pos), pit);
 120
 121         BOOST_ASSERT (pos <= pars[pit].size());
 122
 123         // Make a copy of the CaP paragraphs.
 124         ParagraphList insertion = parlist;
 125         TextClass_ptr const tc = buffer.params().getTextClass_ptr();
 126
 127         // Now remove all out of the pars which is NOT allowed in the
 128         // new environment and set also another font if that is required.
 129
 130         // Convert newline to paragraph break in ERT inset.
 131         // This should not be here!
 132         if (pars[pit].inInset() &&
 133             (pars[pit].inInset()->lyxCode() == Inset::ERT_CODE ||
 134                 pars[pit].inInset()->lyxCode() == Inset::LISTINGS_CODE)) {
 135                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 136                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 137                                 if (insertion[i].isNewline(j)) {
 138                                         // do not track deletion of newline
 139                                         insertion[i].eraseChar(j, false);
 140                                         breakParagraphConservative(
 141                                                         buffer.params(),
 142                                                         insertion, i, j);
 143                                 }
 144                         }
 145                 }
 146         }
 147
 148         // If we are in an inset which returns forceDefaultParagraphs,
 149         // set the paragraphs to default
 150         if (cur.inset().forceDefaultParagraphs(cur.idx())) {
 151                 LayoutPtr const layout =
 152                         buffer.params().getTextClass().defaultLayout();
 153                 ParagraphList::iterator const end = insertion.end();
 154                 for (ParagraphList::iterator par = insertion.begin();
 155                                 par != end; ++par)
 156                         par->layout(layout);
 157         }
 158
 159         // Make sure there is no class difference.
 160         InsetText in;
 161         // This works without copying any paragraph data because we have
 162         // a specialized swap method for ParagraphList. This is important
 163         // since we store pointers to insets at some places and we don't
 164         // want to invalidate them.
 165         insertion.swap(in.paragraphs());
 166         cap::switchBetweenClasses(textclass, tc, in, errorlist);
 167         insertion.swap(in.paragraphs());
 168
 169         ParagraphList::iterator tmpbuf = insertion.begin();
 170         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 171
 172         depth_type max_depth = pars[pit].getMaxDepthAfter();
 173
 174         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 175                 // If we have a negative jump so that the depth would
 176                 // go below 0 depth then we have to redo the delta to
 177                 // this new max depth level so that subsequent
 178                 // paragraphs are aligned correctly to this paragraph
 179                 // at level 0.
 180                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 181                         depth_delta = 0;
 182
 183                 // Set the right depth so that we are not too deep or shallow.
 184                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 185                 if (tmpbuf->params().depth() > max_depth)
 186                         tmpbuf->params().depth(max_depth);
 187
 188                 // Only set this from the 2nd on as the 2nd depends
 189                 // for maxDepth still on pit.
 190                 if (tmpbuf != insertion.begin())
 191                         max_depth = tmpbuf->getMaxDepthAfter();
 192
 193                 // Set the inset owner of this paragraph.
 194                 tmpbuf->setInsetOwner(pars[pit].inInset());
 195                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 196                         if (tmpbuf->getChar(i) == Paragraph::META_INSET &&
 197                             !pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 198                                 // do not track deletion of invalid insets
 199                                 tmpbuf->eraseChar(i--, false);
 200                 }
 201
 202                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 203                                          Change::INSERTED : Change::UNCHANGED));
 204         }
 205
 206         bool const empty = pars[pit].empty();
 207         if (!empty) {
 208                 // Make the buf exactly the same layout as the cursor
 209                 // paragraph.
 210                 insertion.begin()->makeSameLayout(pars[pit]);
 211         }
 212
 213         // Prepare the paragraphs and insets for insertion.
 214         // A couple of insets store buffer references so need updating.
 215         insertion.swap(in.paragraphs());
 216
 217         ParIterator fpit = par_iterator_begin(in);
 218         ParIterator fend = par_iterator_end(in);
 219
 220         for (; fpit != fend; ++fpit) {
 221                 InsetList::const_iterator lit = fpit->insetlist.begin();
 222                 InsetList::const_iterator eit = fpit->insetlist.end();
 223
 224                 for (; lit != eit; ++lit) {
 225                         switch (lit->inset->lyxCode()) {
 226                         case Inset::TABULAR_CODE: {
 227                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 228                                 it->buffer(&buffer);
 229                                 break;
 230                         }
 231
 232                         default:
 233                                 break; // nothing
 234                         }
 235                 }
 236         }
 237         insertion.swap(in.paragraphs());
 238
 239         // Split the paragraph for inserting the buf if necessary.
 240         if (!empty)
 241                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 242
 243         // Paste it!
 244         if (empty) {
 245                 pars.insert(boost::next(pars.begin(), pit),
 246                             insertion.begin(),
 247                             insertion.end());
 248
 249                 // merge the empty par with the last par of the insertion
 250                 mergeParagraph(buffer.params(), pars,
 251                                pit + insertion.size() - 1);
 252         } else {
 253                 pars.insert(boost::next(pars.begin(), pit + 1),
 254                             insertion.begin(),
 255                             insertion.end());
 256
 257                 // merge the first par of the insertion with the current par
 258                 mergeParagraph(buffer.params(), pars, pit);
 259         }
 260
 261         pit_type last_paste = pit + insertion.size() - 1;
 262
 263         // Store the new cursor position.
 264         pit = last_paste;
 265         pos = pars[last_paste].size();
 266
 267         // Join (conditionally) last pasted paragraph with next one, i.e.,
 268         // the tail of the spliced document paragraph
 269         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 270                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 271                         mergeParagraph(buffer.params(), pars, last_paste);
 272                 } else if (pars[last_paste + 1].empty()) {
 273                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 274                         mergeParagraph(buffer.params(), pars, last_paste);
 275                 } else if (pars[last_paste].empty()) {
 276                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 277                         mergeParagraph(buffer.params(), pars, last_paste);
 278                 } else {
 279                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 280                         ++last_paste;
 281                 }
 282         }
 283
 284         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 285 }
 286
 287
 288 PitPosPair eraseSelectionHelper(BufferParams const & params,
 289         ParagraphList & pars,
 290         pit_type startpit, pit_type endpit,
 291         int startpos, int endpos)
 292 {
 293         // Start of selection is really invalid.
 294         if (startpit == pit_type(pars.size()) ||
 295             (startpos > pars[startpit].size()))
 296                 return PitPosPair(endpit, endpos);
 297
 298         // Start and end is inside same paragraph
 299         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 300                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 301                 return PitPosPair(endpit, endpos);
 302         }
 303
 304         for (pit_type pit = startpit; pit != endpit + 1;) {
 305                 pos_type const left  = (pit == startpit ? startpos : 0);
 306                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 307                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 308
 309                 // Logically erase only, including the end-of-paragraph character
 310                 pars[pit].eraseChars(left, right, params.trackChanges);
 311
 312                 // Separate handling of paragraph break:
 313                 if (merge && pit != endpit &&
 314                     (pit + 1 != endpit || pars[pit].hasSameLayout(pars[endpit]))) {
 315                         if (pit + 1 == endpit)
 316                                 endpos += pars[pit].size();
 317                         mergeParagraph(params, pars, pit);
 318                         --endpit;
 319                 } else
 320                         ++pit;
 321         }
 322
 323         // Ensure legal cursor pos:
 324         endpit = startpit;
 325         endpos = startpos;
 326         return PitPosPair(endpit, endpos);
 327 }
 328
 329
 330 void putClipboard(ParagraphList const & paragraphs, TextClass_ptr textclass,
 331                   docstring const & plaintext)
 332 {
 333         // For some strange reason gcc 3.2 and 3.3 do not accept
 334         // Buffer buffer(string(), false);
 335         Buffer buffer("", false);
 336         buffer.setUnnamed(true);
 337         buffer.paragraphs() = paragraphs;
 338         buffer.params().setTextClass(textclass);
 339         std::ostringstream lyx;
 340         if (buffer.write(lyx))
 341                 theClipboard().put(lyx.str(), plaintext);
 342         else
 343                 theClipboard().put(string(), plaintext);
 344 }
 345
 346
 347 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 348         pit_type startpit, pit_type endpit,
 349         int start, int end, TextClass_ptr tc, CutStack & cutstack)
 350 {
 351         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 352         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 353         BOOST_ASSERT(startpit != endpit || start <= end);
 354
 355         // Clone the paragraphs within the selection.
 356         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 357                                 boost::next(pars.begin(), endpit + 1));
 358
 359         // Remove the end of the last paragraph; afterwards, remove the
 360         // beginning of the first paragraph. Keep this order - there may only
 361         // be one paragraph!  Do not track deletions here; this is an internal
 362         // action not visible to the user
 363
 364         Paragraph & back = copy_pars.back();
 365         back.eraseChars(end, back.size(), false);
 366         Paragraph & front = copy_pars.front();
 367         front.eraseChars(0, start, false);
 368
 369         ParagraphList::iterator it = copy_pars.begin();
 370         ParagraphList::iterator it_end = copy_pars.end();
 371
 372         for (; it != it_end; it++) {
 373                 // ERT paragraphs have the Language latex_language.
 374                 // This is invalid outside of ERT, so we need to change it
 375                 // to the buffer language.
 376                 if (it->ownerCode() == Inset::ERT_CODE || it->ownerCode() == Inset::LISTINGS_CODE) {
 377                         it->changeLanguage(buf.params(), latex_language,
 378                                            buf.getLanguage());
 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(TextClass_ptr const & c1,
 407         TextClass_ptr const & c2, InsetText & in, ErrorList & errorlist)
 408 {
 409         errorlist.clear();
 410
 411         BOOST_ASSERT(!in.paragraphs().empty());
 412         if (c1 == c2)
 413                 return;
 414
 415         TextClass const & tclass1 = *c1;
 416         TextClass const & tclass2 = *c2;
 417
 418         // layouts
 419         ParIterator end = par_iterator_end(in);
 420         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 421                 docstring const name = it->layout()->name();
 422                 bool hasLayout = tclass2.hasLayout(name);
 423
 424                 if (hasLayout)
 425                         it->layout(tclass2[name]);
 426                 else
 427                         it->layout(tclass2.defaultLayout());
 428
 429                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 430                         docstring const s = bformat(
 431                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 432                                                 "because of class conversion from\n%3$s to %4$s"),
 433                          name, it->layout()->name(),
 434                          from_utf8(tclass1.name()), from_utf8(tclass2.name()));
 435                         // To warn the user that something had to be done.
 436                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 437                                                       it->id(), 0,
 438                                                       it->size()));
 439                 }
 440         }
 441
 442         // character styles
 443         InsetIterator const i_end = inset_iterator_end(in);
 444         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 445                 if (it->lyxCode() == Inset::FLEX_CODE) {
 446                         InsetFlex & inset =
 447                                 static_cast<InsetFlex &>(*it);
 448                         string const name = inset.params().name;
 449                         InsetLayout const il =
 450                                 tclass2.insetlayout(from_utf8(name));
 451                         inset.setLayout(il);
 452                         if (il.labelstring == from_utf8("UNDEFINED")) {
 453                                 // The flex inset is undefined in tclass2
 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                                          from_utf8(name), from_utf8(tclass1.name()),
 459                                          from_utf8(tclass2.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
 469
 470 std::vector<docstring> const availableSelections(Buffer const & buffer)
 471 {
 472         vector<docstring> selList;
 473
 474         CutStack::const_iterator cit = theCuts.begin();
 475         CutStack::const_iterator end = theCuts.end();
 476         for (; cit != end; ++cit) {
 477                 // we do not use cit-> here because gcc 2.9x does not
 478                 // like it (JMarc)
 479                 ParagraphList const & pars = (*cit).first;
 480                 docstring asciiSel;
 481                 ParagraphList::const_iterator pit = pars.begin();
 482                 ParagraphList::const_iterator pend = pars.end();
 483                 for (; pit != pend; ++pit) {
 484                         asciiSel += pit->asString(buffer, false);
 485                         if (asciiSel.size() > 25) {
 486                                 asciiSel.replace(22, docstring::npos,
 487                                                  from_ascii("..."));
 488                                 break;
 489                         }
 490                 }
 491
 492                 selList.push_back(asciiSel);
 493         }
 494
 495         return selList;
 496 }
 497
 498
 499 size_type numberOfSelections()
 500 {
 501         return theCuts.size();
 502 }
 503
 504
 505 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 506 {
 507         // This doesn't make sense, if there is no selection
 508         if (!cur.selection())
 509                 return;
 510
 511         // OK, we have a selection. This is always between cur.selBegin()
 512         // and cur.selEnd()
 513
 514         if (cur.inTexted()) {
 515                 Text * text = cur.text();
 516                 BOOST_ASSERT(text);
 517
 518                 saveSelection(cur);
 519
 520                 // make sure that the depth behind the selection are restored, too
 521                 recordUndoSelection(cur);
 522                 pit_type begpit = cur.selBegin().pit();
 523                 pit_type endpit = cur.selEnd().pit();
 524
 525                 int endpos = cur.selEnd().pos();
 526
 527                 BufferParams const & bp = cur.buffer().params();
 528                 if (realcut) {
 529                         copySelectionHelper(cur.buffer(),
 530                                 text->paragraphs(),
 531                                 begpit, endpit,
 532                                 cur.selBegin().pos(), endpos,
 533                                 bp.getTextClass_ptr(), theCuts);
 534                         // Stuff what we got on the clipboard.
 535                         // Even if there is no selection.
 536                         putClipboard(theCuts[0].first, theCuts[0].second,
 537                                 cur.selectionAsString(true));
 538                 }
 539
 540                 boost::tie(endpit, endpos) =
 541                         eraseSelectionHelper(bp,
 542                                 text->paragraphs(),
 543                                 begpit, endpit,
 544                                 cur.selBegin().pos(), endpos);
 545
 546                 // cutSelection can invalidate the cursor so we need to set
 547                 // it anew. (Lgb)
 548                 // we prefer the end for when tracking changes
 549                 cur.pos() = endpos;
 550                 cur.pit() = endpit;
 551
 552                 // sometimes necessary
 553                 if (doclear
 554                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 555                         cur.fixIfBroken();
 556
 557                 // need a valid cursor. (Lgb)
 558                 cur.clearSelection();
 559                 updateLabels(cur.buffer());
 560
 561                 // tell tabular that a recent copy happened
 562                 dirtyTabularStack(false);
 563         }
 564
 565         if (cur.inMathed()) {
 566                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 567                         // The current selection spans more than one cell.
 568                         // Record all cells
 569                         recordUndoInset(cur);
 570                 } else {
 571                         // Record only the current cell to avoid a jumping
 572                         // cursor after undo
 573                         recordUndo(cur);
 574                 }
 575                 if (realcut)
 576                         copySelection(cur);
 577                 eraseSelection(cur);
 578         }
 579 }
 580
 581
 582 void copySelection(Cursor & cur)
 583 {
 584         copySelection(cur, cur.selectionAsString(true));
 585 }
 586
 587
 588 namespace {
 589
 590 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 591 {
 592         // this doesn't make sense, if there is no selection
 593         if (!cur.selection())
 594                 return;
 595
 596         // copySelection can not yet handle the case of cross idx selection
 597         if (cur.selBegin().idx() != cur.selEnd().idx())
 598                 return;
 599
 600         if (cur.inTexted()) {
 601                 Text * text = cur.text();
 602                 BOOST_ASSERT(text);
 603                 // ok we have a selection. This is always between cur.selBegin()
 604                 // and sel_end cursor
 605
 606                 // copy behind a space if there is one
 607                 ParagraphList & pars = text->paragraphs();
 608                 pos_type pos = cur.selBegin().pos();
 609                 pit_type par = cur.selBegin().pit();
 610                 while (pos < pars[par].size() &&
 611                        pars[par].isLineSeparator(pos) &&
 612                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 613                         ++pos;
 614
 615                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 616                         pos, cur.selEnd().pos(),
 617                         cur.buffer().params().getTextClass_ptr(), cutstack);
 618                 dirtyTabularStack(false);
 619         }
 620
 621         if (cur.inMathed()) {
 622                 //lyxerr << "copySelection in mathed" << endl;
 623                 ParagraphList pars;
 624                 Paragraph par;
 625                 BufferParams const & bp = cur.buffer().params();
 626                 par.layout(bp.getTextClass().defaultLayout());
 627                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 628                 pars.push_back(par);
 629                 cutstack.push(make_pair(pars, bp.getTextClass_ptr()));
 630         }
 631 }
 632
 633 }
 634
 635
 636 void copySelectionToStack()
 637 {
 638         if (!selectionBuffer.empty())
 639                 theCuts.push(selectionBuffer[0]);
 640 }
 641
 642
 643 void copySelection(Cursor & cur, docstring const & plaintext)
 644 {
 645         // In tablemode, because copy and paste actually use special table stack
 646         // we do not attemp to get selected paragraphs under cursor. Instead, a
 647         // paragraph with the plain text version is generated so that table cells
 648         // can be pasted as pure text somewhere else.
 649         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 650                 ParagraphList pars;
 651                 Paragraph par;
 652                 BufferParams const & bp = cur.buffer().params();
 653                 par.layout(bp.getTextClass().defaultLayout());
 654                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 655                 pars.push_back(par);
 656                 theCuts.push(make_pair(pars, bp.getTextClass_ptr()));
 657         } else
 658                 copySelectionToStack(cur, theCuts);
 659
 660         // stuff the selection onto the X clipboard, from an explicit copy request
 661         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 662 }
 663
 664
 665 void saveSelection(Cursor & cur)
 666 {
 667         // This function is called, not when a selection is formed, but when
 668         // a selection is cleared. Therefore, multiple keyboard selection
 669         // will not repeatively trigger this function (bug 3877).
 670         if (cur.selection()
 671             && cur.selBegin() == cur.bv().cursor().selBegin()
 672             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 673                 LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION << ": `"
 674                            << to_utf8(cur.selectionAsString(true)) << "'."
 675                            << endl;
 676                 copySelectionToStack(cur, selectionBuffer);
 677         }
 678 }
 679
 680
 681 bool selection()
 682 {
 683         return !selectionBuffer.empty();
 684 }
 685
 686
 687 void clearSelection()
 688 {
 689         selectionBuffer.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                         TextClass_ptr 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         recordUndo(cur);
 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                                 recordUndo(cur);
 755                                 pasteParagraphList(cur, buffer.paragraphs(),
 756                                         buffer.params().getTextClass_ptr(), 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         recordUndo(cur);
 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         recordUndo(cur);
 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         recordUndo(cur);
 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         std::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