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