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 "Cursor.h"
  22 #include "debug.h"
  23 #include "ErrorList.h"
  24 #include "FuncRequest.h"
  25 #include "gettext.h"
  26 #include "InsetIterator.h"
  27 #include "Language.h"
  28 #include "lfuns.h"
  29 #include "LyXFunc.h"
  30 #include "LyXRC.h"
  31 #include "Text.h"
  32 #include "TextClassList.h"
  33 #include "Paragraph.h"
  34 #include "paragraph_funcs.h"
  35 #include "ParagraphParameters.h"
  36 #include "ParIterator.h"
  37 #include "Undo.h"
  38
  39 #include "insets/InsetCharStyle.h"
  40 #include "insets/InsetTabular.h"
  41
  42 #include "mathed/MathData.h"
  43 #include "mathed/InsetMath.h"
  44 #include "mathed/MathSupport.h"
  45
  46 #include "support/lstrings.h"
  47
  48 #include "frontends/Clipboard.h"
  49 #include "frontends/Selection.h"
  50
  51 #include <boost/current_function.hpp>
  52 #include <boost/tuple/tuple.hpp>
  53
  54 #include <string>
  55
  56 using std::endl;
  57 using std::for_each;
  58 using std::make_pair;
  59 using std::pair;
  60 using std::vector;
  61 using std::string;
  62
  63
  64 namespace lyx {
  65
  66 using support::bformat;
  67 using frontend::Clipboard;
  68
  69 namespace {
  70
  71 typedef std::pair<pit_type, int> PitPosPair;
  72
  73 typedef limited_stack<pair<ParagraphList, textclass_type> > CutStack;
  74
  75 CutStack theCuts(10);
  76 // persistent selection, cleared until the next selection
  77 CutStack selectionBuffer(1);
  78
  79 // store whether the tabular stack is newer than the normal copy stack
  80 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  81 // when we (hopefully) have a one-for-all paste mechanism.
  82 bool dirty_tabular_stack_ = false;
  83
  84
  85 void region(CursorSlice const & i1, CursorSlice const & i2,
  86         Inset::row_type & r1, Inset::row_type & r2,
  87         Inset::col_type & c1, Inset::col_type & c2)
  88 {
  89         Inset & p = i1.inset();
  90         c1 = p.col(i1.idx());
  91         c2 = p.col(i2.idx());
  92         if (c1 > c2)
  93                 std::swap(c1, c2);
  94         r1 = p.row(i1.idx());
  95         r2 = p.row(i2.idx());
  96         if (r1 > r2)
  97                 std::swap(r1, r2);
  98 }
  99
 100
 101 bool checkPastePossible(int index)
 102 {
 103         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 104 }
 105
 106
 107 pair<PitPosPair, pit_type>
 108 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 109                      textclass_type textclass, ErrorList & errorlist)
 110 {
 111         Buffer const & buffer = cur.buffer();
 112         pit_type pit = cur.pit();
 113         pos_type pos = cur.pos();
 114         ParagraphList & pars = cur.text()->paragraphs();
 115
 116         if (parlist.empty())
 117                 return make_pair(PitPosPair(pit, pos), pit);
 118
 119         BOOST_ASSERT (pos <= pars[pit].size());
 120
 121         // Make a copy of the CaP paragraphs.
 122         ParagraphList insertion = parlist;
 123         textclass_type const tc = buffer.params().textclass;
 124
 125         // Now remove all out of the pars which is NOT allowed in the
 126         // new environment and set also another font if that is required.
 127
 128         // Convert newline to paragraph break in ERT inset.
 129         // This should not be here!
 130         if (pars[pit].inInset() &&
 131             (pars[pit].inInset()->lyxCode() == Inset::ERT_CODE ||
 132                 pars[pit].inInset()->lyxCode() == Inset::LISTINGS_CODE)) {
 133                 for (ParagraphList::size_type i = 0; i < insertion.size(); ++i) {
 134                         for (pos_type j = 0; j < insertion[i].size(); ++j) {
 135                                 if (insertion[i].isNewline(j)) {
 136                                         // do not track deletion of newline
 137                                         insertion[i].eraseChar(j, false);
 138                                         breakParagraphConservative(
 139                                                         buffer.params(),
 140                                                         insertion, i, j);
 141                                 }
 142                         }
 143                 }
 144         }
 145
 146         // If we are in an inset which returns forceDefaultParagraphs,
 147         // set the paragraphs to default
 148         if (cur.inset().forceDefaultParagraphs(cur.idx())) {
 149                 Layout_ptr const layout =
 150                         buffer.params().getTextClass().defaultLayout();
 151                 ParagraphList::iterator const end = insertion.end();
 152                 for (ParagraphList::iterator par = insertion.begin();
 153                                 par != end; ++par)
 154                         par->layout(layout);
 155         }
 156
 157         // Make sure there is no class difference.
 158         InsetText in;
 159         // This works without copying any paragraph data because we have
 160         // a specialized swap method for ParagraphList. This is important
 161         // since we store pointers to insets at some places and we don't
 162         // want to invalidate them.
 163         insertion.swap(in.paragraphs());
 164         cap::switchBetweenClasses(textclass, tc, in, errorlist);
 165         insertion.swap(in.paragraphs());
 166
 167         ParagraphList::iterator tmpbuf = insertion.begin();
 168         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 169
 170         depth_type max_depth = pars[pit].getMaxDepthAfter();
 171
 172         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 173                 // If we have a negative jump so that the depth would
 174                 // go below 0 depth then we have to redo the delta to
 175                 // this new max depth level so that subsequent
 176                 // paragraphs are aligned correctly to this paragraph
 177                 // at level 0.
 178                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 179                         depth_delta = 0;
 180
 181                 // Set the right depth so that we are not too deep or shallow.
 182                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 183                 if (tmpbuf->params().depth() > max_depth)
 184                         tmpbuf->params().depth(max_depth);
 185
 186                 // Only set this from the 2nd on as the 2nd depends
 187                 // for maxDepth still on pit.
 188                 if (tmpbuf != insertion.begin())
 189                         max_depth = tmpbuf->getMaxDepthAfter();
 190
 191                 // Set the inset owner of this paragraph.
 192                 tmpbuf->setInsetOwner(pars[pit].inInset());
 193                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 194                         if (tmpbuf->getChar(i) == Paragraph::META_INSET &&
 195                             !pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 196                                 // do not track deletion of invalid insets
 197                                 tmpbuf->eraseChar(i--, false);
 198                 }
 199
 200                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 201                                          Change::INSERTED : Change::UNCHANGED));
 202         }
 203
 204         bool const empty = pars[pit].empty();
 205         if (!empty) {
 206                 // Make the buf exactly the same layout as the cursor
 207                 // paragraph.
 208                 insertion.begin()->makeSameLayout(pars[pit]);
 209         }
 210
 211         // Prepare the paragraphs and insets for insertion.
 212         // A couple of insets store buffer references so need updating.
 213         insertion.swap(in.paragraphs());
 214
 215         ParIterator fpit = par_iterator_begin(in);
 216         ParIterator fend = par_iterator_end(in);
 217
 218         for (; fpit != fend; ++fpit) {
 219                 InsetList::const_iterator lit = fpit->insetlist.begin();
 220                 InsetList::const_iterator eit = fpit->insetlist.end();
 221
 222                 for (; lit != eit; ++lit) {
 223                         switch (lit->inset->lyxCode()) {
 224                         case Inset::TABULAR_CODE: {
 225                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 226                                 it->buffer(&buffer);
 227                                 break;
 228                         }
 229
 230                         default:
 231                                 break; // nothing
 232                         }
 233                 }
 234         }
 235         insertion.swap(in.paragraphs());
 236
 237         // Split the paragraph for inserting the buf if necessary.
 238         if (!empty)
 239                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 240
 241         // Paste it!
 242         if (empty) {
 243                 pars.insert(boost::next(pars.begin(), pit),
 244                             insertion.begin(),
 245                             insertion.end());
 246
 247                 // merge the empty par with the last par of the insertion
 248                 mergeParagraph(buffer.params(), pars,
 249                                pit + insertion.size() - 1);
 250         } else {
 251                 pars.insert(boost::next(pars.begin(), pit + 1),
 252                             insertion.begin(),
 253                             insertion.end());
 254
 255                 // merge the first par of the insertion with the current par
 256                 mergeParagraph(buffer.params(), pars, pit);
 257         }
 258
 259         pit_type last_paste = pit + insertion.size() - 1;
 260
 261         // Store the new cursor position.
 262         pit = last_paste;
 263         pos = pars[last_paste].size();
 264
 265         // Join (conditionally) last pasted paragraph with next one, i.e.,
 266         // the tail of the spliced document paragraph
 267         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 268                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 269                         mergeParagraph(buffer.params(), pars, last_paste);
 270                 } else if (pars[last_paste + 1].empty()) {
 271                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 272                         mergeParagraph(buffer.params(), pars, last_paste);
 273                 } else if (pars[last_paste].empty()) {
 274                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 275                         mergeParagraph(buffer.params(), pars, last_paste);
 276                 } else {
 277                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 278                         ++last_paste;
 279                 }
 280         }
 281
 282         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 283 }
 284
 285
 286 PitPosPair eraseSelectionHelper(BufferParams const & params,
 287         ParagraphList & pars,
 288         pit_type startpit, pit_type endpit,
 289         int startpos, int endpos, bool doclear)
 290 {
 291         // Start of selection is really invalid.
 292         if (startpit == pit_type(pars.size()) ||
 293             (startpos > pars[startpit].size()))
 294                 return PitPosPair(endpit, endpos);
 295
 296         // Start and end is inside same paragraph
 297         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 298                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 299                 return PitPosPair(endpit, endpos);
 300         }
 301
 302         for (pit_type pit = startpit; pit != endpit + 1;) {
 303                 pos_type const left  = (pit == startpit ? startpos : 0);
 304                 pos_type const right = (pit == endpit ? endpos : pars[pit].size() + 1);
 305
 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[pit + 1]))) {
 314                         pos_type const thissize = pars[pit].size();
 315                         if (doclear)
 316                                 pars[pit + 1].stripLeadingSpaces(params.trackChanges);
 317                         mergeParagraph(params, pars, pit);
 318                         --endpit;
 319                         if (pit == endpit)
 320                                 endpos += thissize;
 321                 } else
 322                         ++pit;
 323         }
 324
 325         // Ensure legal cursor pos:
 326         endpit = startpit;
 327         endpos = startpos;
 328         return PitPosPair(endpit, endpos);
 329 }
 330
 331
 332 void putClipboard(ParagraphList const & paragraphs, textclass_type textclass,
 333                   docstring const & plaintext)
 334 {
 335         // For some strange reason gcc 3.2 and 3.3 do not accept
 336         // Buffer buffer(string(), false);
 337         Buffer buffer("", false);
 338         buffer.setUnnamed(true);
 339         buffer.paragraphs() = paragraphs;
 340         buffer.params().textclass = textclass;
 341         std::ostringstream lyx;
 342         if (buffer.write(lyx))
 343                 theClipboard().put(lyx.str(), plaintext);
 344         else
 345                 theClipboard().put(string(), plaintext);
 346 }
 347
 348
 349 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 350         pit_type startpit, pit_type endpit,
 351         int start, int end, textclass_type tc, CutStack & cutstack)
 352 {
 353         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 354         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 355         BOOST_ASSERT(startpit != endpit || start <= end);
 356
 357         // Clone the paragraphs within the selection.
 358         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 359                                 boost::next(pars.begin(), endpit + 1));
 360
 361         // Remove the end of the last paragraph; afterwards, remove the
 362         // beginning of the first paragraph. Keep this order - there may only
 363         // be one paragraph!  Do not track deletions here; this is an internal
 364         // action not visible to the user
 365
 366         Paragraph & back = copy_pars.back();
 367         back.eraseChars(end, back.size(), false);
 368         Paragraph & front = copy_pars.front();
 369         front.eraseChars(0, start, false);
 370
 371         ParagraphList::iterator it = copy_pars.begin();
 372         ParagraphList::iterator it_end = copy_pars.end();
 373
 374         for (; it != it_end; it++) {
 375                 // ERT paragraphs have the Language latex_language.
 376                 // This is invalid outside of ERT, so we need to change it
 377                 // to the buffer language.
 378                 if (it->ownerCode() == Inset::ERT_CODE || it->ownerCode() == Inset::LISTINGS_CODE) {
 379                         it->changeLanguage(buf.params(), latex_language,
 380                                            buf.getLanguage());
 381                 }
 382                 it->setInsetOwner(0);
 383         }
 384
 385         // do not copy text (also nested in insets) which is marked as deleted
 386         // acceptChanges() is defined for Text rather than ParagraphList
 387         // Thus we must wrap copy_pars into a Text object and cross our fingers
 388         Text lt;
 389         copy_pars.swap(lt.paragraphs());
 390         lt.acceptChanges(buf.params());
 391         copy_pars.swap(lt.paragraphs());
 392
 393         cutstack.push(make_pair(copy_pars, tc));
 394 }
 395
 396 } // namespace anon
 397
 398
 399
 400
 401 namespace cap {
 402
 403 docstring grabAndEraseSelection(Cursor & cur)
 404 {
 405         if (!cur.selection())
 406                 return docstring();
 407         docstring res = grabSelection(cur);
 408         eraseSelection(cur);
 409         return res;
 410 }
 411
 412
 413 void switchBetweenClasses(textclass_type c1, textclass_type c2,
 414         InsetText & in, ErrorList & errorlist)
 415 {
 416         BOOST_ASSERT(!in.paragraphs().empty());
 417         if (c1 == c2)
 418                 return;
 419
 420         TextClass const & tclass1 = textclasslist[c1];
 421         TextClass const & tclass2 = textclasslist[c2];
 422
 423         // layouts
 424         ParIterator end = par_iterator_end(in);
 425         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 426                 string const name = it->layout()->name();
 427                 bool hasLayout = tclass2.hasLayout(name);
 428
 429                 if (hasLayout)
 430                         it->layout(tclass2[name]);
 431                 else
 432                         it->layout(tclass2.defaultLayout());
 433
 434                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 435                         docstring const s = bformat(
 436                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 437                                                 "because of class conversion from\n%3$s to %4$s"),
 438                          from_utf8(name), from_utf8(it->layout()->name()),
 439                          from_utf8(tclass1.name()), from_utf8(tclass2.name()));
 440                         // To warn the user that something had to be done.
 441                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 442                                                       it->id(), 0,
 443                                                       it->size()));
 444                 }
 445         }
 446
 447         // character styles
 448         InsetIterator const i_end = inset_iterator_end(in);
 449         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 450                 if (it->lyxCode() == Inset::CHARSTYLE_CODE) {
 451                         InsetCharStyle & inset =
 452                                 static_cast<InsetCharStyle &>(*it);
 453                         string const name = inset.params().type;
 454                         CharStyles::iterator const found_cs =
 455                                 tclass2.charstyle(name);
 456                         if (found_cs == tclass2.charstyles().end()) {
 457                                 // The character style is undefined in tclass2
 458                                 inset.setUndefined();
 459                                 docstring const s = bformat(_(
 460                                         "Character style %1$s is "
 461                                         "undefined because of class "
 462                                         "conversion from\n%2$s to %3$s"),
 463                                          from_utf8(name), from_utf8(tclass1.name()),
 464                                          from_utf8(tclass2.name()));
 465                                 // To warn the user that something had to be done.
 466                                 errorlist.push_back(ErrorItem(
 467                                         _("Undefined character style"),
 468                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 469                         } else if (inset.undefined()) {
 470                                 // The character style is undefined in
 471                                 // tclass1 and is defined in tclass2
 472                                 inset.setDefined(found_cs);
 473                         }
 474                 }
 475         }
 476 }
 477
 478
 479 std::vector<docstring> const availableSelections(Buffer const & buffer)
 480 {
 481         vector<docstring> selList;
 482
 483         CutStack::const_iterator cit = theCuts.begin();
 484         CutStack::const_iterator end = theCuts.end();
 485         for (; cit != end; ++cit) {
 486                 // we do not use cit-> here because gcc 2.9x does not
 487                 // like it (JMarc)
 488                 ParagraphList const & pars = (*cit).first;
 489                 docstring asciiSel;
 490                 ParagraphList::const_iterator pit = pars.begin();
 491                 ParagraphList::const_iterator pend = pars.end();
 492                 for (; pit != pend; ++pit) {
 493                         asciiSel += pit->asString(buffer, false);
 494                         if (asciiSel.size() > 25) {
 495                                 asciiSel.replace(22, docstring::npos,
 496                                                  from_ascii("..."));
 497                                 break;
 498                         }
 499                 }
 500
 501                 selList.push_back(asciiSel);
 502         }
 503
 504         return selList;
 505 }
 506
 507
 508 size_type numberOfSelections()
 509 {
 510         return theCuts.size();
 511 }
 512
 513
 514 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 515 {
 516         // This doesn't make sense, if there is no selection
 517         if (!cur.selection())
 518                 return;
 519
 520         // OK, we have a selection. This is always between cur.selBegin()
 521         // and cur.selEnd()
 522
 523         if (cur.inTexted()) {
 524                 Text * text = cur.text();
 525                 BOOST_ASSERT(text);
 526
 527                 // make sure that the depth behind the selection are restored, too
 528                 recordUndoSelection(cur);
 529                 pit_type begpit = cur.selBegin().pit();
 530                 pit_type endpit = cur.selEnd().pit();
 531
 532                 int endpos = cur.selEnd().pos();
 533
 534                 BufferParams const & bp = cur.buffer().params();
 535                 if (realcut) {
 536                         copySelectionHelper(cur.buffer(),
 537                                 text->paragraphs(),
 538                                 begpit, endpit,
 539                                 cur.selBegin().pos(), endpos,
 540                                 bp.textclass, theCuts);
 541                         // Stuff what we got on the clipboard.
 542                         // Even if there is no selection.
 543                         putClipboard(theCuts[0].first, theCuts[0].second,
 544                                 cur.selectionAsString(true));
 545                 }
 546
 547                 boost::tie(endpit, endpos) =
 548                         eraseSelectionHelper(bp,
 549                                 text->paragraphs(),
 550                                 begpit, endpit,
 551                                 cur.selBegin().pos(), endpos,
 552                                 doclear);
 553
 554                 // cutSelection can invalidate the cursor so we need to set
 555                 // it anew. (Lgb)
 556                 // we prefer the end for when tracking changes
 557                 cur.pos() = endpos;
 558                 cur.pit() = endpit;
 559
 560                 // sometimes necessary
 561                 if (doclear
 562                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 563                         cur.fixIfBroken();
 564
 565                 // need a valid cursor. (Lgb)
 566                 cur.clearSelection();
 567                 updateLabels(cur.buffer());
 568                 theSelection().haveSelection(false);
 569
 570                 // tell tabular that a recent copy happened
 571                 dirtyTabularStack(false);
 572         }
 573
 574         if (cur.inMathed()) {
 575                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 576                         // The current selection spans more than one cell.
 577                         // Record all cells
 578                         recordUndoInset(cur);
 579                 } else {
 580                         // Record only the current cell to avoid a jumping
 581                         // cursor after undo
 582                         recordUndo(cur);
 583                 }
 584                 if (realcut)
 585                         copySelection(cur);
 586                 eraseSelection(cur);
 587         }
 588 }
 589
 590
 591 void copySelection(Cursor & cur)
 592 {
 593         copySelection(cur, cur.selectionAsString(true));
 594 }
 595
 596
 597 namespace {
 598
 599 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 600 {
 601         // this doesn't make sense, if there is no selection
 602         if (!cur.selection())
 603                 return;
 604
 605         if (cur.inTexted()) {
 606                 Text * text = cur.text();
 607                 BOOST_ASSERT(text);
 608                 // ok we have a selection. This is always between cur.selBegin()
 609                 // and sel_end cursor
 610
 611                 // copy behind a space if there is one
 612                 ParagraphList & pars = text->paragraphs();
 613                 pos_type pos = cur.selBegin().pos();
 614                 pit_type par = cur.selBegin().pit();
 615                 while (pos < pars[par].size() &&
 616                        pars[par].isLineSeparator(pos) &&
 617                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 618                         ++pos;
 619
 620                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 621                         pos, cur.selEnd().pos(), cur.buffer().params().textclass, cutstack);
 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.textclass));
 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.textclass));
 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         LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION << ": `"
 671                << to_utf8(cur.selectionAsString(true)) << "'."
 672                << endl;
 673
 674         if (cur.selection())
 675                 copySelectionToStack(cur, selectionBuffer);
 676         // tell X whether we now have a valid selection
 677         theSelection().haveSelection(cur.selection());
 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_type 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.top(), 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         saveSelection(cur);
 735 }
 736
 737
 738 void pasteClipboard(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 739 {
 740         // Use internal clipboard if it is the most recent one
 741         if (theClipboard().isInternal()) {
 742                 pasteFromStack(cur, errorList, 0);
 743                 return;
 744         }
 745
 746         // First try LyX format
 747         if (theClipboard().hasLyXContents()) {
 748                 string lyx = theClipboard().getAsLyX();
 749                 if (!lyx.empty()) {
 750                         // For some strange reason gcc 3.2 and 3.3 do not accept
 751                         // Buffer buffer(string(), false);
 752                         Buffer buffer("", false);
 753                         buffer.setUnnamed(true);
 754                         if (buffer.readString(lyx)) {
 755                                 recordUndo(cur);
 756                                 pasteParagraphList(cur, buffer.paragraphs(),
 757                                         buffer.params().textclass, errorList);
 758                                 cur.setSelection();
 759                                 return;
 760                         }
 761                 }
 762         }
 763
 764         // Then try plain text
 765         docstring const text = theClipboard().getAsText();
 766         if (text.empty())
 767                 return;
 768         recordUndo(cur);
 769         if (asParagraphs)
 770                 cur.text()->insertStringAsParagraphs(cur, text);
 771         else
 772                 cur.text()->insertStringAsLines(cur, text);
 773 }
 774
 775
 776 void pasteSelection(Cursor & cur, ErrorList & errorList)
 777 {
 778         if (selectionBuffer.empty())
 779                 return;
 780         recordUndo(cur);
 781         pasteParagraphList(cur, selectionBuffer[0].first,
 782                            selectionBuffer[0].second, errorList);
 783         cur.setSelection();
 784 }
 785
 786
 787 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 788 {
 789         recordUndo(cur);
 790         DocIterator selbeg = cur.selectionBegin();
 791
 792         // Get font setting before we cut
 793         Font const font =
 794                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 795
 796         // Insert the new string
 797         pos_type pos = cur.selEnd().pos();
 798         Paragraph & par = cur.selEnd().paragraph();
 799         docstring::const_iterator cit = str.begin();
 800         docstring::const_iterator end = str.end();
 801         for (; cit != end; ++cit, ++pos)
 802                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 803
 804         // Cut the selection
 805         cutSelection(cur, true, false);
 806
 807         // select the replacement
 808         if (backwards) {
 809                 selbeg.pos() += str.length();
 810                 cur.setSelection(selbeg, -int(str.length()));
 811         } else
 812                 cur.setSelection(selbeg, str.length());
 813         saveSelection(cur);
 814 }
 815
 816
 817 void replaceSelection(Cursor & cur)
 818 {
 819         if (cur.selection())
 820                 cutSelection(cur, true, false);
 821 }
 822
 823
 824 void eraseSelection(Cursor & cur)
 825 {
 826         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 827         CursorSlice const & i1 = cur.selBegin();
 828         CursorSlice const & i2 = cur.selEnd();
 829         if (i1.inset().asInsetMath()) {
 830                 cur.top() = i1;
 831                 if (i1.idx() == i2.idx()) {
 832                         i1.cell().erase(i1.pos(), i2.pos());
 833                         // We may have deleted i1.cell(cur.pos()).
 834                         // Make sure that pos is valid.
 835                         if (cur.pos() > cur.lastpos())
 836                                 cur.pos() = cur.lastpos();
 837                 } else {
 838                         InsetMath * p = i1.asInsetMath();
 839                         Inset::row_type r1, r2;
 840                         Inset::col_type c1, c2;
 841                         region(i1, i2, r1, r2, c1, c2);
 842                         for (Inset::row_type row = r1; row <= r2; ++row)
 843                                 for (Inset::col_type col = c1; col <= c2; ++col)
 844                                         p->cell(p->index(row, col)).clear();
 845                         // We've deleted the whole cell. Only pos 0 is valid.
 846                         cur.pos() = 0;
 847                 }
 848                 // need a valid cursor. (Lgb)
 849                 cur.clearSelection();
 850                 theSelection().haveSelection(false);
 851         } else {
 852                 lyxerr << "can't erase this selection 1" << endl;
 853         }
 854         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 855 }
 856
 857
 858 void selDel(Cursor & cur)
 859 {
 860         //lyxerr << "cap::selDel" << endl;
 861         if (cur.selection())
 862                 eraseSelection(cur);
 863 }
 864
 865
 866 void selClearOrDel(Cursor & cur)
 867 {
 868         //lyxerr << "cap::selClearOrDel" << endl;
 869         if (lyxrc.auto_region_delete)
 870                 selDel(cur);
 871         else
 872                 cur.selection() = false;
 873 }
 874
 875
 876 docstring grabSelection(Cursor const & cur)
 877 {
 878         if (!cur.selection())
 879                 return docstring();
 880
 881         // FIXME: What is wrong with the following?
 882 #if 0
 883         std::ostringstream os;
 884         for (DocIterator dit = cur.selectionBegin();
 885              dit != cur.selectionEnd(); dit.forwardPos())
 886                 os << asString(dit.cell());
 887         return os.str();
 888 #endif
 889
 890         CursorSlice i1 = cur.selBegin();
 891         CursorSlice i2 = cur.selEnd();
 892
 893         if (i1.idx() == i2.idx()) {
 894                 if (i1.inset().asInsetMath()) {
 895                         MathData::const_iterator it = i1.cell().begin();
 896                         return asString(MathData(it + i1.pos(), it + i2.pos()));
 897                 } else {
 898                         return from_ascii("unknown selection 1");
 899                 }
 900         }
 901
 902         Inset::row_type r1, r2;
 903         Inset::col_type c1, c2;
 904         region(i1, i2, r1, r2, c1, c2);
 905
 906         docstring data;
 907         if (i1.inset().asInsetMath()) {
 908                 for (Inset::row_type row = r1; row <= r2; ++row) {
 909                         if (row > r1)
 910                                 data += "\\\\";
 911                         for (Inset::col_type col = c1; col <= c2; ++col) {
 912                                 if (col > c1)
 913                                         data += '&';
 914                                 data += asString(i1.asInsetMath()->
 915                                         cell(i1.asInsetMath()->index(row, col)));
 916                         }
 917                 }
 918         } else {
 919                 data = from_ascii("unknown selection 2");
 920         }
 921         return data;
 922 }
 923
 924
 925 void dirtyTabularStack(bool b)
 926 {
 927         dirty_tabular_stack_ = b;
 928 }
 929
 930
 931 bool tabularStackDirty()
 932 {
 933         return dirty_tabular_stack_;
 934 }
 935
 936
 937 } // namespace cap
 938
 939 } // namespace lyx