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 "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/lstrings.h"
  48
  49 #include "frontends/Clipboard.h"
  50 #include "frontends/Selection.h"
  51
  52 #include <boost/current_function.hpp>
  53 #include <boost/tuple/tuple.hpp>
  54
  55 #include <string>
  56
  57 using std::endl;
  58 using std::for_each;
  59 using std::make_pair;
  60 using std::pair;
  61 using std::vector;
  62 using std::string;
  63
  64
  65 namespace lyx {
  66
  67 using support::bformat;
  68 using frontend::Clipboard;
  69
  70 namespace {
  71
  72 typedef std::pair<pit_type, int> PitPosPair;
  73
  74 typedef limited_stack<pair<ParagraphList, TextClassPtr> > CutStack;
  75
  76 CutStack theCuts(10);
  77 // persistent selection, cleared until the next selection
  78 CutStack selectionBuffer(1);
  79
  80 // store whether the tabular stack is newer than the normal copy stack
  81 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  82 // when we (hopefully) have a one-for-all paste mechanism.
  83 bool dirty_tabular_stack_ = false;
  84
  85
  86 void region(CursorSlice const & i1, CursorSlice const & i2,
  87         Inset::row_type & r1, Inset::row_type & r2,
  88         Inset::col_type & c1, Inset::col_type & c2)
  89 {
  90         Inset & p = i1.inset();
  91         c1 = p.col(i1.idx());
  92         c2 = p.col(i2.idx());
  93         if (c1 > c2)
  94                 std::swap(c1, c2);
  95         r1 = p.row(i1.idx());
  96         r2 = p.row(i2.idx());
  97         if (r1 > r2)
  98                 std::swap(r1, r2);
  99 }
 100
 101
 102 bool checkPastePossible(int index)
 103 {
 104         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 105 }
 106
 107
 108 pair<PitPosPair, pit_type>
 109 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 110                      TextClassPtr textclass, ErrorList & errorlist)
 111 {
 112         Buffer const & buffer = cur.buffer();
 113         pit_type pit = cur.pit();
 114         pos_type pos = cur.pos();
 115         ParagraphList & pars = cur.text()->paragraphs();
 116
 117         if (parlist.empty())
 118                 return make_pair(PitPosPair(pit, pos), pit);
 119
 120         BOOST_ASSERT (pos <= pars[pit].size());
 121
 122         // Make a copy of the CaP paragraphs.
 123         ParagraphList insertion = parlist;
 124         TextClassPtr const tc = buffer.params().getTextClassPtr();
 125
 126         // Now remove all out of the pars which is NOT allowed in the
 127         // new environment and set also another font if that is required.
 128
 129         // Convert newline to paragraph break in ERT inset.
 130         // This should not be here!
 131         if (pars[pit].inInset() &&
 132             (pars[pit].inInset()->lyxCode() == Inset::ERT_CODE ||
 133                 pars[pit].inInset()->lyxCode() == Inset::LISTINGS_CODE)) {
 134                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 135                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 136                                 if (insertion[i].isNewline(j)) {
 137                                         // do not track deletion of newline
 138                                         insertion[i].eraseChar(j, false);
 139                                         breakParagraphConservative(
 140                                                         buffer.params(),
 141                                                         insertion, i, j);
 142                                 }
 143                         }
 144                 }
 145         }
 146
 147         // If we are in an inset which returns forceDefaultParagraphs,
 148         // set the paragraphs to default
 149         if (cur.inset().forceDefaultParagraphs(cur.idx())) {
 150                 LayoutPtr const layout =
 151                         buffer.params().getTextClass().defaultLayout();
 152                 ParagraphList::iterator const end = insertion.end();
 153                 for (ParagraphList::iterator par = insertion.begin();
 154                                 par != end; ++par)
 155                         par->layout(layout);
 156         }
 157
 158         // Make sure there is no class difference.
 159         InsetText in;
 160         // This works without copying any paragraph data because we have
 161         // a specialized swap method for ParagraphList. This is important
 162         // since we store pointers to insets at some places and we don't
 163         // want to invalidate them.
 164         insertion.swap(in.paragraphs());
 165         cap::switchBetweenClasses(textclass, tc, in, errorlist);
 166         insertion.swap(in.paragraphs());
 167
 168         ParagraphList::iterator tmpbuf = insertion.begin();
 169         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 170
 171         depth_type max_depth = pars[pit].getMaxDepthAfter();
 172
 173         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 174                 // If we have a negative jump so that the depth would
 175                 // go below 0 depth then we have to redo the delta to
 176                 // this new max depth level so that subsequent
 177                 // paragraphs are aligned correctly to this paragraph
 178                 // at level 0.
 179                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 180                         depth_delta = 0;
 181
 182                 // Set the right depth so that we are not too deep or shallow.
 183                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 184                 if (tmpbuf->params().depth() > max_depth)
 185                         tmpbuf->params().depth(max_depth);
 186
 187                 // Only set this from the 2nd on as the 2nd depends
 188                 // for maxDepth still on pit.
 189                 if (tmpbuf != insertion.begin())
 190                         max_depth = tmpbuf->getMaxDepthAfter();
 191
 192                 // Set the inset owner of this paragraph.
 193                 tmpbuf->setInsetOwner(pars[pit].inInset());
 194                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 195                         if (tmpbuf->getChar(i) == Paragraph::META_INSET &&
 196                             !pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 197                                 // do not track deletion of invalid insets
 198                                 tmpbuf->eraseChar(i--, false);
 199                 }
 200
 201                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 202                                          Change::INSERTED : Change::UNCHANGED));
 203         }
 204
 205         bool const empty = pars[pit].empty();
 206         if (!empty) {
 207                 // Make the buf exactly the same layout as the cursor
 208                 // paragraph.
 209                 insertion.begin()->makeSameLayout(pars[pit]);
 210         }
 211
 212         // Prepare the paragraphs and insets for insertion.
 213         // A couple of insets store buffer references so need updating.
 214         insertion.swap(in.paragraphs());
 215
 216         ParIterator fpit = par_iterator_begin(in);
 217         ParIterator fend = par_iterator_end(in);
 218
 219         for (; fpit != fend; ++fpit) {
 220                 InsetList::const_iterator lit = fpit->insetlist.begin();
 221                 InsetList::const_iterator eit = fpit->insetlist.end();
 222
 223                 for (; lit != eit; ++lit) {
 224                         switch (lit->inset->lyxCode()) {
 225                         case Inset::TABULAR_CODE: {
 226                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 227                                 it->buffer(&buffer);
 228                                 break;
 229                         }
 230
 231                         default:
 232                                 break; // nothing
 233                         }
 234                 }
 235         }
 236         insertion.swap(in.paragraphs());
 237
 238         // Split the paragraph for inserting the buf if necessary.
 239         if (!empty)
 240                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 241
 242         // Paste it!
 243         if (empty) {
 244                 pars.insert(boost::next(pars.begin(), pit),
 245                             insertion.begin(),
 246                             insertion.end());
 247
 248                 // merge the empty par with the last par of the insertion
 249                 mergeParagraph(buffer.params(), pars,
 250                                pit + insertion.size() - 1);
 251         } else {
 252                 pars.insert(boost::next(pars.begin(), pit + 1),
 253                             insertion.begin(),
 254                             insertion.end());
 255
 256                 // merge the first par of the insertion with the current par
 257                 mergeParagraph(buffer.params(), pars, pit);
 258         }
 259
 260         pit_type last_paste = pit + insertion.size() - 1;
 261
 262         // Store the new cursor position.
 263         pit = last_paste;
 264         pos = pars[last_paste].size();
 265
 266         // Join (conditionally) last pasted paragraph with next one, i.e.,
 267         // the tail of the spliced document paragraph
 268         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 269                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 270                         mergeParagraph(buffer.params(), pars, last_paste);
 271                 } else if (pars[last_paste + 1].empty()) {
 272                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 273                         mergeParagraph(buffer.params(), pars, last_paste);
 274                 } else if (pars[last_paste].empty()) {
 275                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 276                         mergeParagraph(buffer.params(), pars, last_paste);
 277                 } else {
 278                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 279                         ++last_paste;
 280                 }
 281         }
 282
 283         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 284 }
 285
 286
 287 PitPosPair eraseSelectionHelper(BufferParams const & params,
 288         ParagraphList & pars,
 289         pit_type startpit, pit_type endpit,
 290         int startpos, int endpos)
 291 {
 292         // Start of selection is really invalid.
 293         if (startpit == pit_type(pars.size()) ||
 294             (startpos > pars[startpit].size()))
 295                 return PitPosPair(endpit, endpos);
 296
 297         // Start and end is inside same paragraph
 298         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 299                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 300                 return PitPosPair(endpit, endpos);
 301         }
 302
 303         for (pit_type pit = startpit; pit != endpit + 1;) {
 304                 pos_type const left  = (pit == startpit ? startpos : 0);
 305                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 306                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 307
 308                 // Logically erase only, including the end-of-paragraph character
 309                 pars[pit].eraseChars(left, right, params.trackChanges);
 310
 311                 // Separate handling of paragraph break:
 312                 if (merge && pit != endpit &&
 313                     (pit + 1 != endpit || pars[pit].hasSameLayout(pars[endpit]))) {
 314                         if (pit + 1 == endpit)
 315                                 endpos += pars[pit].size();
 316                         mergeParagraph(params, pars, pit);
 317                         --endpit;
 318                 } else
 319                         ++pit;
 320         }
 321
 322         // Ensure legal cursor pos:
 323         endpit = startpit;
 324         endpos = startpos;
 325         return PitPosPair(endpit, endpos);
 326 }
 327
 328
 329 void putClipboard(ParagraphList const & paragraphs, TextClassPtr textclass,
 330                   docstring const & plaintext)
 331 {
 332         // For some strange reason gcc 3.2 and 3.3 do not accept
 333         // Buffer buffer(string(), false);
 334         Buffer buffer("", false);
 335         buffer.setUnnamed(true);
 336         buffer.paragraphs() = paragraphs;
 337         buffer.params().setTextClass(textclass);
 338         std::ostringstream lyx;
 339         if (buffer.write(lyx))
 340                 theClipboard().put(lyx.str(), plaintext);
 341         else
 342                 theClipboard().put(string(), plaintext);
 343 }
 344
 345
 346 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 347         pit_type startpit, pit_type endpit,
 348         int start, int end, TextClassPtr tc, CutStack & cutstack)
 349 {
 350         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 351         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 352         BOOST_ASSERT(startpit != endpit || start <= end);
 353
 354         // Clone the paragraphs within the selection.
 355         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 356                                 boost::next(pars.begin(), endpit + 1));
 357
 358         // Remove the end of the last paragraph; afterwards, remove the
 359         // beginning of the first paragraph. Keep this order - there may only
 360         // be one paragraph!  Do not track deletions here; this is an internal
 361         // action not visible to the user
 362
 363         Paragraph & back = copy_pars.back();
 364         back.eraseChars(end, back.size(), false);
 365         Paragraph & front = copy_pars.front();
 366         front.eraseChars(0, start, false);
 367
 368         ParagraphList::iterator it = copy_pars.begin();
 369         ParagraphList::iterator it_end = copy_pars.end();
 370
 371         for (; it != it_end; it++) {
 372                 // ERT paragraphs have the Language latex_language.
 373                 // This is invalid outside of ERT, so we need to change it
 374                 // to the buffer language.
 375                 if (it->ownerCode() == Inset::ERT_CODE || it->ownerCode() == Inset::LISTINGS_CODE) {
 376                         it->changeLanguage(buf.params(), latex_language,
 377                                            buf.getLanguage());
 378                 }
 379                 it->setInsetOwner(0);
 380         }
 381
 382         // do not copy text (also nested in insets) which is marked as deleted
 383         acceptChanges(copy_pars, buf.params());
 384
 385         cutstack.push(make_pair(copy_pars, tc));
 386 }
 387
 388 } // namespace anon
 389
 390
 391
 392
 393 namespace cap {
 394
 395 docstring grabAndEraseSelection(Cursor & cur)
 396 {
 397         if (!cur.selection())
 398                 return docstring();
 399         docstring res = grabSelection(cur);
 400         eraseSelection(cur);
 401         return res;
 402 }
 403
 404
 405 void switchBetweenClasses(TextClassPtr const & c1,
 406         TextClassPtr const & c2, InsetText & in, ErrorList & errorlist)
 407 {
 408         errorlist.clear();
 409
 410         BOOST_ASSERT(!in.paragraphs().empty());
 411         if (c1 == c2)
 412                 return;
 413
 414         TextClass const & tclass1 = *c1;
 415         TextClass const & tclass2 = *c2;
 416
 417         // layouts
 418         ParIterator end = par_iterator_end(in);
 419         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 420                 docstring const name = it->layout()->name();
 421                 bool hasLayout = tclass2.hasLayout(name);
 422
 423                 if (hasLayout)
 424                         it->layout(tclass2[name]);
 425                 else
 426                         it->layout(tclass2.defaultLayout());
 427
 428                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 429                         docstring const s = bformat(
 430                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 431                                                 "because of class conversion from\n%3$s to %4$s"),
 432                          name, it->layout()->name(),
 433                          from_utf8(tclass1.name()), from_utf8(tclass2.name()));
 434                         // To warn the user that something had to be done.
 435                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 436                                                       it->id(), 0,
 437                                                       it->size()));
 438                 }
 439         }
 440
 441         // character styles
 442         InsetIterator const i_end = inset_iterator_end(in);
 443         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 444                 if (it->lyxCode() == Inset::FLEX_CODE) {
 445                         InsetFlex & inset =
 446                                 static_cast<InsetFlex &>(*it);
 447                         string const name = inset.params().name;
 448                         InsetLayout const il =
 449                                 tclass2.insetlayout(from_utf8(name));
 450                         inset.setLayout(il);
 451                         if (il.labelstring == from_utf8("UNDEFINED")) {
 452                                 // The flex inset is undefined in tclass2
 453                                 docstring const s = bformat(_(
 454                                         "Flex inset %1$s is "
 455                                         "undefined because of class "
 456                                         "conversion from\n%2$s to %3$s"),
 457                                          from_utf8(name), from_utf8(tclass1.name()),
 458                                          from_utf8(tclass2.name()));
 459                                 // To warn the user that something had to be done.
 460                                 errorlist.push_back(ErrorItem(
 461                                         _("Undefined flex inset"),
 462                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 463                         }
 464                 }
 465         }
 466 }
 467
 468
 469 std::vector<docstring> const availableSelections(Buffer const & buffer)
 470 {
 471         vector<docstring> selList;
 472
 473         CutStack::const_iterator cit = theCuts.begin();
 474         CutStack::const_iterator end = theCuts.end();
 475         for (; cit != end; ++cit) {
 476                 // we do not use cit-> here because gcc 2.9x does not
 477                 // like it (JMarc)
 478                 ParagraphList const & pars = (*cit).first;
 479                 docstring asciiSel;
 480                 ParagraphList::const_iterator pit = pars.begin();
 481                 ParagraphList::const_iterator pend = pars.end();
 482                 for (; pit != pend; ++pit) {
 483                         asciiSel += pit->asString(buffer, false);
 484                         if (asciiSel.size() > 25) {
 485                                 asciiSel.replace(22, docstring::npos,
 486                                                  from_ascii("..."));
 487                                 break;
 488                         }
 489                 }
 490
 491                 selList.push_back(asciiSel);
 492         }
 493
 494         return selList;
 495 }
 496
 497
 498 size_type numberOfSelections()
 499 {
 500         return theCuts.size();
 501 }
 502
 503
 504 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 505 {
 506         // This doesn't make sense, if there is no selection
 507         if (!cur.selection())
 508                 return;
 509
 510         // OK, we have a selection. This is always between cur.selBegin()
 511         // and cur.selEnd()
 512
 513         if (cur.inTexted()) {
 514                 Text * text = cur.text();
 515                 BOOST_ASSERT(text);
 516
 517                 saveSelection(cur);
 518
 519                 // make sure that the depth behind the selection are restored, too
 520                 recordUndoSelection(cur);
 521                 pit_type begpit = cur.selBegin().pit();
 522                 pit_type endpit = cur.selEnd().pit();
 523
 524                 int endpos = cur.selEnd().pos();
 525
 526                 BufferParams const & bp = cur.buffer().params();
 527                 if (realcut) {
 528                         copySelectionHelper(cur.buffer(),
 529                                 text->paragraphs(),
 530                                 begpit, endpit,
 531                                 cur.selBegin().pos(), endpos,
 532                                 bp.getTextClassPtr(), theCuts);
 533                         // Stuff what we got on the clipboard.
 534                         // Even if there is no selection.
 535                         putClipboard(theCuts[0].first, theCuts[0].second,
 536                                 cur.selectionAsString(true));
 537                 }
 538
 539                 boost::tie(endpit, endpos) =
 540                         eraseSelectionHelper(bp,
 541                                 text->paragraphs(),
 542                                 begpit, endpit,
 543                                 cur.selBegin().pos(), endpos);
 544
 545                 // cutSelection can invalidate the cursor so we need to set
 546                 // it anew. (Lgb)
 547                 // we prefer the end for when tracking changes
 548                 cur.pos() = endpos;
 549                 cur.pit() = endpit;
 550
 551                 // sometimes necessary
 552                 if (doclear
 553                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 554                         cur.fixIfBroken();
 555
 556                 // need a valid cursor. (Lgb)
 557                 cur.clearSelection();
 558                 updateLabels(cur.buffer());
 559
 560                 // tell tabular that a recent copy happened
 561                 dirtyTabularStack(false);
 562         }
 563
 564         if (cur.inMathed()) {
 565                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 566                         // The current selection spans more than one cell.
 567                         // Record all cells
 568                         recordUndoInset(cur);
 569                 } else {
 570                         // Record only the current cell to avoid a jumping
 571                         // cursor after undo
 572                         recordUndo(cur);
 573                 }
 574                 if (realcut)
 575                         copySelection(cur);
 576                 eraseSelection(cur);
 577         }
 578 }
 579
 580
 581 void copySelection(Cursor & cur)
 582 {
 583         copySelection(cur, cur.selectionAsString(true));
 584 }
 585
 586
 587 namespace {
 588
 589 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 590 {
 591         // this doesn't make sense, if there is no selection
 592         if (!cur.selection())
 593                 return;
 594
 595         // copySelection can not yet handle the case of cross idx selection
 596         if (cur.selBegin().idx() != cur.selEnd().idx())
 597                 return;
 598
 599         if (cur.inTexted()) {
 600                 Text * text = cur.text();
 601                 BOOST_ASSERT(text);
 602                 // ok we have a selection. This is always between cur.selBegin()
 603                 // and sel_end cursor
 604
 605                 // copy behind a space if there is one
 606                 ParagraphList & pars = text->paragraphs();
 607                 pos_type pos = cur.selBegin().pos();
 608                 pit_type par = cur.selBegin().pit();
 609                 while (pos < pars[par].size() &&
 610                        pars[par].isLineSeparator(pos) &&
 611                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 612                         ++pos;
 613
 614                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 615                         pos, cur.selEnd().pos(),
 616                         cur.buffer().params().getTextClassPtr(), cutstack);
 617                 dirtyTabularStack(false);
 618         }
 619
 620         if (cur.inMathed()) {
 621                 //lyxerr << "copySelection in mathed" << endl;
 622                 ParagraphList pars;
 623                 Paragraph par;
 624                 BufferParams const & bp = cur.buffer().params();
 625                 par.layout(bp.getTextClass().defaultLayout());
 626                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 627                 pars.push_back(par);
 628                 cutstack.push(make_pair(pars, bp.getTextClassPtr()));
 629         }
 630 }
 631
 632 }
 633
 634
 635 void copySelectionToStack()
 636 {
 637         if (!selectionBuffer.empty())
 638                 theCuts.push(selectionBuffer[0]);
 639 }
 640
 641
 642 void copySelection(Cursor & cur, docstring const & plaintext)
 643 {
 644         // In tablemode, because copy and paste actually use special table stack
 645         // we do not attemp to get selected paragraphs under cursor. Instead, a
 646         // paragraph with the plain text version is generated so that table cells
 647         // can be pasted as pure text somewhere else.
 648         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 649                 ParagraphList pars;
 650                 Paragraph par;
 651                 BufferParams const & bp = cur.buffer().params();
 652                 par.layout(bp.getTextClass().defaultLayout());
 653                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 654                 pars.push_back(par);
 655                 theCuts.push(make_pair(pars, bp.getTextClassPtr()));
 656         } else
 657                 copySelectionToStack(cur, theCuts);
 658
 659         // stuff the selection onto the X clipboard, from an explicit copy request
 660         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 661 }
 662
 663
 664 void saveSelection(Cursor & cur)
 665 {
 666         // This function is called, not when a selection is formed, but when
 667         // a selection is cleared. Therefore, multiple keyboard selection
 668         // will not repeatively trigger this function (bug 3877).
 669         if (cur.selection()
 670             && cur.selBegin() == cur.bv().cursor().selBegin()
 671             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 672                 LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION << ": `"
 673                            << to_utf8(cur.selectionAsString(true)) << "'."
 674                            << endl;
 675                 copySelectionToStack(cur, selectionBuffer);
 676         }
 677 }
 678
 679
 680 bool selection()
 681 {
 682         return !selectionBuffer.empty();
 683 }
 684
 685
 686 void clearSelection()
 687 {
 688         selectionBuffer.clear();
 689 }
 690
 691
 692 void clearCutStack()
 693 {
 694         theCuts.clear();
 695 }
 696
 697
 698 docstring getSelection(Buffer const & buf, size_t sel_index)
 699 {
 700         return sel_index < theCuts.size()
 701                 ? theCuts[sel_index].first.back().asString(buf, false)
 702                 : docstring();
 703 }
 704
 705
 706 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 707                         TextClassPtr textclass, ErrorList & errorList)
 708 {
 709         if (cur.inTexted()) {
 710                 Text * text = cur.text();
 711                 BOOST_ASSERT(text);
 712
 713                 pit_type endpit;
 714                 PitPosPair ppp;
 715
 716                 boost::tie(ppp, endpit) =
 717                         pasteSelectionHelper(cur, parlist,
 718                                              textclass, errorList);
 719                 updateLabels(cur.buffer());
 720                 cur.clearSelection();
 721                 text->setCursor(cur, ppp.first, ppp.second);
 722         }
 723
 724         // mathed is handled in InsetMathNest/InsetMathGrid
 725         BOOST_ASSERT(!cur.inMathed());
 726 }
 727
 728
 729 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 730 {
 731         // this does not make sense, if there is nothing to paste
 732         if (!checkPastePossible(sel_index))
 733                 return;
 734
 735         recordUndo(cur);
 736         pasteParagraphList(cur, theCuts[sel_index].first,
 737                            theCuts[sel_index].second, errorList);
 738         cur.setSelection();
 739 }
 740
 741
 742 void pasteClipboard(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 743 {
 744         // Use internal clipboard if it is the most recent one
 745         if (theClipboard().isInternal()) {
 746                 pasteFromStack(cur, errorList, 0);
 747                 return;
 748         }
 749
 750         // First try LyX format
 751         if (theClipboard().hasLyXContents()) {
 752                 string lyx = theClipboard().getAsLyX();
 753                 if (!lyx.empty()) {
 754                         // For some strange reason gcc 3.2 and 3.3 do not accept
 755                         // Buffer buffer(string(), false);
 756                         Buffer buffer("", false);
 757                         buffer.setUnnamed(true);
 758                         if (buffer.readString(lyx)) {
 759                                 recordUndo(cur);
 760                                 pasteParagraphList(cur, buffer.paragraphs(),
 761                                         buffer.params().getTextClassPtr(), errorList);
 762                                 cur.setSelection();
 763                                 return;
 764                         }
 765                 }
 766         }
 767
 768         // Then try plain text
 769         docstring const text = theClipboard().getAsText();
 770         if (text.empty())
 771                 return;
 772         recordUndo(cur);
 773         if (asParagraphs)
 774                 cur.text()->insertStringAsParagraphs(cur, text);
 775         else
 776                 cur.text()->insertStringAsLines(cur, text);
 777 }
 778
 779
 780 void pasteSelection(Cursor & cur, ErrorList & errorList)
 781 {
 782         if (selectionBuffer.empty())
 783                 return;
 784         recordUndo(cur);
 785         pasteParagraphList(cur, selectionBuffer[0].first,
 786                            selectionBuffer[0].second, errorList);
 787 }
 788
 789
 790 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 791 {
 792         recordUndo(cur);
 793         DocIterator selbeg = cur.selectionBegin();
 794
 795         // Get font setting before we cut
 796         Font const font =
 797                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 798
 799         // Insert the new string
 800         pos_type pos = cur.selEnd().pos();
 801         Paragraph & par = cur.selEnd().paragraph();
 802         docstring::const_iterator cit = str.begin();
 803         docstring::const_iterator end = str.end();
 804         for (; cit != end; ++cit, ++pos)
 805                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 806
 807         // Cut the selection
 808         cutSelection(cur, true, false);
 809
 810         // select the replacement
 811         if (backwards) {
 812                 selbeg.pos() += str.length();
 813                 cur.setSelection(selbeg, -int(str.length()));
 814         } else
 815                 cur.setSelection(selbeg, str.length());
 816 }
 817
 818
 819 void replaceSelection(Cursor & cur)
 820 {
 821         if (cur.selection())
 822                 cutSelection(cur, true, false);
 823 }
 824
 825
 826 void eraseSelection(Cursor & cur)
 827 {
 828         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 829         CursorSlice const & i1 = cur.selBegin();
 830         CursorSlice const & i2 = cur.selEnd();
 831         if (i1.inset().asInsetMath()) {
 832                 saveSelection(cur);
 833                 cur.top() = i1;
 834                 if (i1.idx() == i2.idx()) {
 835                         i1.cell().erase(i1.pos(), i2.pos());
 836                         // We may have deleted i1.cell(cur.pos()).
 837                         // Make sure that pos is valid.
 838                         if (cur.pos() > cur.lastpos())
 839                                 cur.pos() = cur.lastpos();
 840                 } else {
 841                         InsetMath * p = i1.asInsetMath();
 842                         Inset::row_type r1, r2;
 843                         Inset::col_type c1, c2;
 844                         region(i1, i2, r1, r2, c1, c2);
 845                         for (Inset::row_type row = r1; row <= r2; ++row)
 846                                 for (Inset::col_type col = c1; col <= c2; ++col)
 847                                         p->cell(p->index(row, col)).clear();
 848                         // We've deleted the whole cell. Only pos 0 is valid.
 849                         cur.pos() = 0;
 850                 }
 851                 // need a valid cursor. (Lgb)
 852                 cur.clearSelection();
 853         } else {
 854                 lyxerr << "can't erase this selection 1" << endl;
 855         }
 856         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 857 }
 858
 859
 860 void selDel(Cursor & cur)
 861 {
 862         //lyxerr << "cap::selDel" << endl;
 863         if (cur.selection())
 864                 eraseSelection(cur);
 865 }
 866
 867
 868 void selClearOrDel(Cursor & cur)
 869 {
 870         //lyxerr << "cap::selClearOrDel" << endl;
 871         if (lyxrc.auto_region_delete)
 872                 selDel(cur);
 873         else
 874                 cur.selection() = false;
 875 }
 876
 877
 878 docstring grabSelection(Cursor const & cur)
 879 {
 880         if (!cur.selection())
 881                 return docstring();
 882
 883         // FIXME: What is wrong with the following?
 884 #if 0
 885         std::ostringstream os;
 886         for (DocIterator dit = cur.selectionBegin();
 887              dit != cur.selectionEnd(); dit.forwardPos())
 888                 os << asString(dit.cell());
 889         return os.str();
 890 #endif
 891
 892         CursorSlice i1 = cur.selBegin();
 893         CursorSlice i2 = cur.selEnd();
 894
 895         if (i1.idx() == i2.idx()) {
 896                 if (i1.inset().asInsetMath()) {
 897                         MathData::const_iterator it = i1.cell().begin();
 898                         return asString(MathData(it + i1.pos(), it + i2.pos()));
 899                 } else {
 900                         return from_ascii("unknown selection 1");
 901                 }
 902         }
 903
 904         Inset::row_type r1, r2;
 905         Inset::col_type c1, c2;
 906         region(i1, i2, r1, r2, c1, c2);
 907
 908         docstring data;
 909         if (i1.inset().asInsetMath()) {
 910                 for (Inset::row_type row = r1; row <= r2; ++row) {
 911                         if (row > r1)
 912                                 data += "\\\\";
 913                         for (Inset::col_type col = c1; col <= c2; ++col) {
 914                                 if (col > c1)
 915                                         data += '&';
 916                                 data += asString(i1.asInsetMath()->
 917                                         cell(i1.asInsetMath()->index(row, col)));
 918                         }
 919                 }
 920         } else {
 921                 data = from_ascii("unknown selection 2");
 922         }
 923         return data;
 924 }
 925
 926
 927 void dirtyTabularStack(bool b)
 928 {
 929         dirty_tabular_stack_ = b;
 930 }
 931
 932
 933 bool tabularStackDirty()
 934 {
 935         return dirty_tabular_stack_;
 936 }
 937
 938
 939 } // namespace cap
 940
 941 } // namespace lyx