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
  52 #include "frontends/Clipboard.h"
  53 #include "frontends/Selection.h"
  54
  55 #include <boost/current_function.hpp>
  56 #include <boost/tuple/tuple.hpp>
  57 #include <boost/next_prior.hpp>
  58
  59 #include <string>
  60
  61 using std::endl;
  62 using std::for_each;
  63 using std::make_pair;
  64 using std::pair;
  65 using std::vector;
  66 using std::string;
  67
  68
  69 namespace lyx {
  70
  71 using support::bformat;
  72 using frontend::Clipboard;
  73
  74 namespace {
  75
  76 typedef std::pair<pit_type, int> PitPosPair;
  77
  78 typedef limited_stack<pair<ParagraphList, TextClassPtr> > CutStack;
  79
  80 CutStack theCuts(10);
  81 // persistent selection, cleared until the next selection
  82 CutStack selectionBuffer(1);
  83
  84 // store whether the tabular stack is newer than the normal copy stack
  85 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  86 // when we (hopefully) have a one-for-all paste mechanism.
  87 bool dirty_tabular_stack_ = false;
  88
  89
  90 void region(CursorSlice const & i1, CursorSlice const & i2,
  91         Inset::row_type & r1, Inset::row_type & r2,
  92         Inset::col_type & c1, Inset::col_type & c2)
  93 {
  94         Inset & p = i1.inset();
  95         c1 = p.col(i1.idx());
  96         c2 = p.col(i2.idx());
  97         if (c1 > c2)
  98                 std::swap(c1, c2);
  99         r1 = p.row(i1.idx());
 100         r2 = p.row(i2.idx());
 101         if (r1 > r2)
 102                 std::swap(r1, r2);
 103 }
 104
 105
 106 bool checkPastePossible(int index)
 107 {
 108         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 109 }
 110
 111
 112 pair<PitPosPair, pit_type>
 113 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 114                      TextClassPtr textclass, ErrorList & errorlist)
 115 {
 116         Buffer const & buffer = cur.buffer();
 117         pit_type pit = cur.pit();
 118         pos_type pos = cur.pos();
 119         ParagraphList & pars = cur.text()->paragraphs();
 120
 121         if (parlist.empty())
 122                 return make_pair(PitPosPair(pit, pos), pit);
 123
 124         BOOST_ASSERT (pos <= pars[pit].size());
 125
 126         // Make a copy of the CaP paragraphs.
 127         ParagraphList insertion = parlist;
 128         TextClassPtr const tc = buffer.params().getTextClassPtr();
 129
 130         // Now remove all out of the pars which is NOT allowed in the
 131         // new environment and set also another font if that is required.
 132
 133         // Convert newline to paragraph break in ERT inset.
 134         // This should not be here!
 135         if (pars[pit].inInset() &&
 136             (pars[pit].inInset()->lyxCode() == ERT_CODE ||
 137                 pars[pit].inInset()->lyxCode() == LISTINGS_CODE)) {
 138                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 139                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 140                                 if (insertion[i].isNewline(j)) {
 141                                         // do not track deletion of newline
 142                                         insertion[i].eraseChar(j, false);
 143                                         breakParagraphConservative(
 144                                                         buffer.params(),
 145                                                         insertion, i, j);
 146                                 }
 147                         }
 148                 }
 149         }
 150
 151         // If we are in an inset which returns forceDefaultParagraphs,
 152         // set the paragraphs to default
 153         if (cur.inset().forceDefaultParagraphs(cur.idx())) {
 154                 LayoutPtr const layout =
 155                         buffer.params().getTextClass().defaultLayout();
 156                 ParagraphList::iterator const end = insertion.end();
 157                 for (ParagraphList::iterator par = insertion.begin();
 158                                 par != end; ++par)
 159                         par->layout(layout);
 160         }
 161
 162         // Make sure there is no class difference.
 163         InsetText in;
 164         // This works without copying any paragraph data because we have
 165         // a specialized swap method for ParagraphList. This is important
 166         // since we store pointers to insets at some places and we don't
 167         // want to invalidate them.
 168         insertion.swap(in.paragraphs());
 169         cap::switchBetweenClasses(textclass, tc, in, errorlist);
 170         insertion.swap(in.paragraphs());
 171
 172         ParagraphList::iterator tmpbuf = insertion.begin();
 173         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 174
 175         depth_type max_depth = pars[pit].getMaxDepthAfter();
 176
 177         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 178                 // If we have a negative jump so that the depth would
 179                 // go below 0 depth then we have to redo the delta to
 180                 // this new max depth level so that subsequent
 181                 // paragraphs are aligned correctly to this paragraph
 182                 // at level 0.
 183                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 184                         depth_delta = 0;
 185
 186                 // Set the right depth so that we are not too deep or shallow.
 187                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 188                 if (tmpbuf->params().depth() > max_depth)
 189                         tmpbuf->params().depth(max_depth);
 190
 191                 // Only set this from the 2nd on as the 2nd depends
 192                 // for maxDepth still on pit.
 193                 if (tmpbuf != insertion.begin())
 194                         max_depth = tmpbuf->getMaxDepthAfter();
 195
 196                 // Set the inset owner of this paragraph.
 197                 tmpbuf->setInsetOwner(pars[pit].inInset());
 198                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 199                         if (tmpbuf->getChar(i) == Paragraph::META_INSET &&
 200                             !pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 201                                 // do not track deletion of invalid insets
 202                                 tmpbuf->eraseChar(i--, false);
 203                 }
 204
 205                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 206                                          Change::INSERTED : Change::UNCHANGED));
 207         }
 208
 209         bool const empty = pars[pit].empty();
 210         if (!empty) {
 211                 // Make the buf exactly the same layout as the cursor
 212                 // paragraph.
 213                 insertion.begin()->makeSameLayout(pars[pit]);
 214         }
 215
 216         // Prepare the paragraphs and insets for insertion.
 217         // A couple of insets store buffer references so need updating.
 218         insertion.swap(in.paragraphs());
 219
 220         ParIterator fpit = par_iterator_begin(in);
 221         ParIterator fend = par_iterator_end(in);
 222
 223         for (; fpit != fend; ++fpit) {
 224                 InsetList::const_iterator lit = fpit->insetList().begin();
 225                 InsetList::const_iterator eit = fpit->insetList().end();
 226
 227                 for (; lit != eit; ++lit) {
 228                         switch (lit->inset->lyxCode()) {
 229                         case TABULAR_CODE: {
 230                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 231                                 it->buffer(&buffer);
 232                                 break;
 233                         }
 234
 235                         default:
 236                                 break; // nothing
 237                         }
 238                 }
 239         }
 240         insertion.swap(in.paragraphs());
 241
 242         // Split the paragraph for inserting the buf if necessary.
 243         if (!empty)
 244                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 245
 246         // Paste it!
 247         if (empty) {
 248                 pars.insert(boost::next(pars.begin(), pit),
 249                             insertion.begin(),
 250                             insertion.end());
 251
 252                 // merge the empty par with the last par of the insertion
 253                 mergeParagraph(buffer.params(), pars,
 254                                pit + insertion.size() - 1);
 255         } else {
 256                 pars.insert(boost::next(pars.begin(), pit + 1),
 257                             insertion.begin(),
 258                             insertion.end());
 259
 260                 // merge the first par of the insertion with the current par
 261                 mergeParagraph(buffer.params(), pars, pit);
 262         }
 263
 264         pit_type last_paste = pit + insertion.size() - 1;
 265
 266         // Store the new cursor position.
 267         pit = last_paste;
 268         pos = pars[last_paste].size();
 269
 270         // Join (conditionally) last pasted paragraph with next one, i.e.,
 271         // the tail of the spliced document paragraph
 272         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 273                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 274                         mergeParagraph(buffer.params(), pars, last_paste);
 275                 } else if (pars[last_paste + 1].empty()) {
 276                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 277                         mergeParagraph(buffer.params(), pars, last_paste);
 278                 } else if (pars[last_paste].empty()) {
 279                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 280                         mergeParagraph(buffer.params(), pars, last_paste);
 281                 } else {
 282                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 283                         ++last_paste;
 284                 }
 285         }
 286
 287         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 288 }
 289
 290
 291 PitPosPair eraseSelectionHelper(BufferParams const & params,
 292         ParagraphList & pars,
 293         pit_type startpit, pit_type endpit,
 294         int startpos, int endpos)
 295 {
 296         // Start of selection is really invalid.
 297         if (startpit == pit_type(pars.size()) ||
 298             (startpos > pars[startpit].size()))
 299                 return PitPosPair(endpit, endpos);
 300
 301         // Start and end is inside same paragraph
 302         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 303                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 304                 return PitPosPair(endpit, endpos);
 305         }
 306
 307         for (pit_type pit = startpit; pit != endpit + 1;) {
 308                 pos_type const left  = (pit == startpit ? startpos : 0);
 309                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 310                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 311
 312                 // Logically erase only, including the end-of-paragraph character
 313                 pars[pit].eraseChars(left, right, params.trackChanges);
 314
 315                 // Separate handling of paragraph break:
 316                 if (merge && pit != endpit &&
 317                     (pit + 1 != endpit || pars[pit].hasSameLayout(pars[endpit]))) {
 318                         if (pit + 1 == endpit)
 319                                 endpos += pars[pit].size();
 320                         mergeParagraph(params, pars, pit);
 321                         --endpit;
 322                 } else
 323                         ++pit;
 324         }
 325
 326         // Ensure legal cursor pos:
 327         endpit = startpit;
 328         endpos = startpos;
 329         return PitPosPair(endpit, endpos);
 330 }
 331
 332
 333 void putClipboard(ParagraphList const & paragraphs, TextClassPtr textclass,
 334                   docstring const & plaintext)
 335 {
 336         // For some strange reason gcc 3.2 and 3.3 do not accept
 337         // Buffer buffer(string(), false);
 338         Buffer buffer("", false);
 339         buffer.setUnnamed(true);
 340         buffer.paragraphs() = paragraphs;
 341         buffer.params().setTextClass(textclass);
 342         std::ostringstream lyx;
 343         if (buffer.write(lyx))
 344                 theClipboard().put(lyx.str(), plaintext);
 345         else
 346                 theClipboard().put(string(), plaintext);
 347 }
 348
 349
 350 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 351         pit_type startpit, pit_type endpit,
 352         int start, int end, TextClassPtr tc, CutStack & cutstack)
 353 {
 354         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 355         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 356         BOOST_ASSERT(startpit != endpit || start <= end);
 357
 358         // Clone the paragraphs within the selection.
 359         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 360                                 boost::next(pars.begin(), endpit + 1));
 361
 362         // Remove the end of the last paragraph; afterwards, remove the
 363         // beginning of the first paragraph. Keep this order - there may only
 364         // be one paragraph!  Do not track deletions here; this is an internal
 365         // action not visible to the user
 366
 367         Paragraph & back = copy_pars.back();
 368         back.eraseChars(end, back.size(), false);
 369         Paragraph & front = copy_pars.front();
 370         front.eraseChars(0, start, false);
 371
 372         ParagraphList::iterator it = copy_pars.begin();
 373         ParagraphList::iterator it_end = copy_pars.end();
 374
 375         for (; it != it_end; it++) {
 376                 // ERT paragraphs have the Language latex_language.
 377                 // This is invalid outside of ERT, so we need to change it
 378                 // to the buffer language.
 379                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 380                         it->changeLanguage(buf.params(), latex_language,
 381                                            buf.getLanguage());
 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                 if (it->lyxCode() == FLEX_CODE) {
 449                         InsetFlex & inset =
 450                                 static_cast<InsetFlex &>(*it);
 451                         string const name = inset.params().name;
 452                         InsetLayout const il =
 453                                 tclass2.insetlayout(from_utf8(name));
 454                         inset.setLayout(il);
 455                         if (il.labelstring == from_utf8("UNDEFINED")) {
 456                                 // The flex inset is undefined in tclass2
 457                                 docstring const s = bformat(_(
 458                                         "Flex inset %1$s is "
 459                                         "undefined because of class "
 460                                         "conversion from\n%2$s to %3$s"),
 461                                          from_utf8(name), from_utf8(tclass1.name()),
 462                                          from_utf8(tclass2.name()));
 463                                 // To warn the user that something had to be done.
 464                                 errorlist.push_back(ErrorItem(
 465                                         _("Undefined flex inset"),
 466                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 467                         }
 468                 }
 469         }
 470 }
 471
 472
 473 std::vector<docstring> const availableSelections(Buffer const & buffer)
 474 {
 475         vector<docstring> selList;
 476
 477         CutStack::const_iterator cit = theCuts.begin();
 478         CutStack::const_iterator end = theCuts.end();
 479         for (; cit != end; ++cit) {
 480                 // we do not use cit-> here because gcc 2.9x does not
 481                 // like it (JMarc)
 482                 ParagraphList const & pars = (*cit).first;
 483                 docstring asciiSel;
 484                 ParagraphList::const_iterator pit = pars.begin();
 485                 ParagraphList::const_iterator pend = pars.end();
 486                 for (; pit != pend; ++pit) {
 487                         asciiSel += pit->asString(buffer, false);
 488                         if (asciiSel.size() > 25) {
 489                                 asciiSel.replace(22, docstring::npos,
 490                                                  from_ascii("..."));
 491                                 break;
 492                         }
 493                 }
 494
 495                 selList.push_back(asciiSel);
 496         }
 497
 498         return selList;
 499 }
 500
 501
 502 size_type numberOfSelections()
 503 {
 504         return theCuts.size();
 505 }
 506
 507
 508 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 509 {
 510         // This doesn't make sense, if there is no selection
 511         if (!cur.selection())
 512                 return;
 513
 514         // OK, we have a selection. This is always between cur.selBegin()
 515         // and cur.selEnd()
 516
 517         if (cur.inTexted()) {
 518                 Text * text = cur.text();
 519                 BOOST_ASSERT(text);
 520
 521                 saveSelection(cur);
 522
 523                 // make sure that the depth behind the selection are restored, too
 524                 cur.recordUndoSelection();
 525                 pit_type begpit = cur.selBegin().pit();
 526                 pit_type endpit = cur.selEnd().pit();
 527
 528                 int endpos = cur.selEnd().pos();
 529
 530                 BufferParams const & bp = cur.buffer().params();
 531                 if (realcut) {
 532                         copySelectionHelper(cur.buffer(),
 533                                 text->paragraphs(),
 534                                 begpit, endpit,
 535                                 cur.selBegin().pos(), endpos,
 536                                 bp.getTextClassPtr(), theCuts);
 537                         // Stuff what we got on the clipboard.
 538                         // Even if there is no selection.
 539                         putClipboard(theCuts[0].first, theCuts[0].second,
 540                                 cur.selectionAsString(true));
 541                 }
 542
 543                 boost::tie(endpit, endpos) =
 544                         eraseSelectionHelper(bp,
 545                                 text->paragraphs(),
 546                                 begpit, endpit,
 547                                 cur.selBegin().pos(), endpos);
 548
 549                 // cutSelection can invalidate the cursor so we need to set
 550                 // it anew. (Lgb)
 551                 // we prefer the end for when tracking changes
 552                 cur.pos() = endpos;
 553                 cur.pit() = endpit;
 554
 555                 // sometimes necessary
 556                 if (doclear
 557                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 558                         cur.fixIfBroken();
 559
 560                 // need a valid cursor. (Lgb)
 561                 cur.clearSelection();
 562                 updateLabels(cur.buffer());
 563
 564                 // tell tabular that a recent copy happened
 565                 dirtyTabularStack(false);
 566         }
 567
 568         if (cur.inMathed()) {
 569                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 570                         // The current selection spans more than one cell.
 571                         // Record all cells
 572                         cur.recordUndoInset();
 573                 } else {
 574                         // Record only the current cell to avoid a jumping
 575                         // cursor after undo
 576                         cur.recordUndo();
 577                 }
 578                 if (realcut)
 579                         copySelection(cur);
 580                 eraseSelection(cur);
 581         }
 582 }
 583
 584
 585 void copySelection(Cursor & cur)
 586 {
 587         copySelection(cur, cur.selectionAsString(true));
 588 }
 589
 590
 591 namespace {
 592
 593 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 594 {
 595         // this doesn't make sense, if there is no selection
 596         if (!cur.selection())
 597                 return;
 598
 599         // copySelection can not yet handle the case of cross idx selection
 600         if (cur.selBegin().idx() != cur.selEnd().idx())
 601                 return;
 602
 603         if (cur.inTexted()) {
 604                 Text * text = cur.text();
 605                 BOOST_ASSERT(text);
 606                 // ok we have a selection. This is always between cur.selBegin()
 607                 // and sel_end cursor
 608
 609                 // copy behind a space if there is one
 610                 ParagraphList & pars = text->paragraphs();
 611                 pos_type pos = cur.selBegin().pos();
 612                 pit_type par = cur.selBegin().pit();
 613                 while (pos < pars[par].size() &&
 614                        pars[par].isLineSeparator(pos) &&
 615                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 616                         ++pos;
 617
 618                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 619                         pos, cur.selEnd().pos(),
 620                         cur.buffer().params().getTextClassPtr(), cutstack);
 621                 dirtyTabularStack(false);
 622         }
 623
 624         if (cur.inMathed()) {
 625                 //lyxerr << "copySelection in mathed" << endl;
 626                 ParagraphList pars;
 627                 Paragraph par;
 628                 BufferParams const & bp = cur.buffer().params();
 629                 par.layout(bp.getTextClass().defaultLayout());
 630                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 631                 pars.push_back(par);
 632                 cutstack.push(make_pair(pars, bp.getTextClassPtr()));
 633         }
 634 }
 635
 636 }
 637
 638
 639 void copySelectionToStack()
 640 {
 641         if (!selectionBuffer.empty())
 642                 theCuts.push(selectionBuffer[0]);
 643 }
 644
 645
 646 void copySelection(Cursor & cur, docstring const & plaintext)
 647 {
 648         // In tablemode, because copy and paste actually use special table stack
 649         // we do not attemp to get selected paragraphs under cursor. Instead, a
 650         // paragraph with the plain text version is generated so that table cells
 651         // can be pasted as pure text somewhere else.
 652         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 653                 ParagraphList pars;
 654                 Paragraph par;
 655                 BufferParams const & bp = cur.buffer().params();
 656                 par.layout(bp.getTextClass().defaultLayout());
 657                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 658                 pars.push_back(par);
 659                 theCuts.push(make_pair(pars, bp.getTextClassPtr()));
 660         } else
 661                 copySelectionToStack(cur, theCuts);
 662
 663         // stuff the selection onto the X clipboard, from an explicit copy request
 664         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 665 }
 666
 667
 668 void saveSelection(Cursor & cur)
 669 {
 670         // This function is called, not when a selection is formed, but when
 671         // a selection is cleared. Therefore, multiple keyboard selection
 672         // will not repeatively trigger this function (bug 3877).
 673         if (cur.selection()
 674             && cur.selBegin() == cur.bv().cursor().selBegin()
 675             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 676                 LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION << ": `"
 677                            << to_utf8(cur.selectionAsString(true)) << "'."
 678                            << endl;
 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