src/CutAndPaste.C

   1 /*
   2  * \file CutAndPaste.C
   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 "lyxtext.h"
  32 #include "lyxtextclasslist.h"
  33 #include "paragraph.h"
  34 #include "paragraph_funcs.h"
  35 #include "ParagraphParameters.h"
  36 #include "ParagraphList_fwd.h"
  37 #include "pariterator.h"
  38 #include "undo.h"
  39
  40 #include "insets/insetcharstyle.h"
  41 #include "insets/insettabular.h"
  42
  43 #include "mathed/MathData.h"
  44 #include "mathed/InsetMath.h"
  45 #include "mathed/MathSupport.h"
  46
  47 #include "support/lstrings.h"
  48
  49 #include "frontends/Clipboard.h"
  50 #include "frontends/Selection.h"
  51
  52 #include <boost/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         InsetBase::row_type & r1, InsetBase::row_type & r2,
  87         InsetBase::col_type & c1, InsetBase::col_type & c2)
  88 {
  89         InsetBase & 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(LCursor & 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() == InsetBase::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                 LyXLayout_ptr const layout =
 149                         buffer.params().getLyXTextClass().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 InsetBase::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         Buffer buffer(string(), false);
 335         buffer.setUnnamed(true);
 336         buffer.paragraphs() = paragraphs;
 337         buffer.params().textclass = textclass;
 338         std::ostringstream lyx;
 339         if (buffer.write(lyx))
 340                 theClipboard().put(lyx.str(), plaintext);
 341         else
 342                 theClipboard().put(string(), plaintext);
 343 }
 344
 345
 346 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 347         pit_type startpit, pit_type endpit,
 348         int start, int end, textclass_type tc, CutStack & cutstack)
 349 {
 350         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 351         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 352         BOOST_ASSERT(startpit != endpit || start <= end);
 353
 354         // Clone the paragraphs within the selection.
 355         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 356                                 boost::next(pars.begin(), endpit + 1));
 357
 358         // Remove the end of the last paragraph; afterwards, remove the beginning
 359         // of the first paragraph. Keep this order - there may only be one paragraph!
 360         // Do not track deletions here; this is an internal action not visible to the user
 361         Paragraph & back = copy_pars.back();
 362         back.eraseChars(end, back.size(), false);
 363         Paragraph & front = copy_pars.front();
 364         front.eraseChars(0, start, false);
 365
 366         ParagraphList::iterator it = copy_pars.begin();
 367         ParagraphList::iterator it_end = copy_pars.end();
 368
 369         for (; it != it_end; it++) {
 370                 // ERT paragraphs have the Language latex_language.
 371                 // This is invalid outside of ERT, so we need to change it
 372                 // to the buffer language.
 373                 if (it->ownerCode() == InsetBase::ERT_CODE) {
 374                         it->changeLanguage(buf.params(), latex_language,
 375                                            buf.getLanguage());
 376                 }
 377                 it->setInsetOwner(0);
 378         }
 379
 380         // do not copy text (also nested in insets) which is marked as deleted
 381         // acceptChanges() is defined for LyXText rather than ParagraphList
 382         // Thus we must wrap copy_pars into a LyXText object and cross our fingers
 383         LyXText lt;
 384         copy_pars.swap(lt.paragraphs());
 385         lt.acceptChanges(buf.params());
 386         copy_pars.swap(lt.paragraphs());
 387
 388         cutstack.push(make_pair(copy_pars, tc));
 389 }
 390
 391 } // namespace anon
 392
 393
 394
 395
 396 namespace cap {
 397
 398 docstring grabAndEraseSelection(LCursor & cur)
 399 {
 400         if (!cur.selection())
 401                 return docstring();
 402         docstring res = grabSelection(cur);
 403         eraseSelection(cur);
 404         return res;
 405 }
 406
 407
 408 void switchBetweenClasses(textclass_type c1, textclass_type c2,
 409         InsetText & in, ErrorList & errorlist)
 410 {
 411         BOOST_ASSERT(!in.paragraphs().empty());
 412         if (c1 == c2)
 413                 return;
 414
 415         LyXTextClass const & tclass1 = textclasslist[c1];
 416         LyXTextClass const & tclass2 = textclasslist[c2];
 417
 418         // layouts
 419         ParIterator end = par_iterator_end(in);
 420         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 421                 string const name = it->layout()->name();
 422                 bool hasLayout = tclass2.hasLayout(name);
 423
 424                 if (hasLayout)
 425                         it->layout(tclass2[name]);
 426                 else
 427                         it->layout(tclass2.defaultLayout());
 428
 429                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 430                         docstring const s = bformat(
 431                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 432                                                 "because of class conversion from\n%3$s to %4$s"),
 433                          from_utf8(name), from_utf8(it->layout()->name()),
 434                          from_utf8(tclass1.name()), from_utf8(tclass2.name()));
 435                         // To warn the user that something had to be done.
 436                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 437                                                       it->id(), 0,
 438                                                       it->size()));
 439                 }
 440         }
 441
 442         // character styles
 443         InsetIterator const i_end = inset_iterator_end(in);
 444         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 445                 if (it->lyxCode() == InsetBase::CHARSTYLE_CODE) {
 446                         InsetCharStyle & inset =
 447                                 static_cast<InsetCharStyle &>(*it);
 448                         string const name = inset.params().type;
 449                         CharStyles::iterator const found_cs =
 450                                 tclass2.charstyle(name);
 451                         if (found_cs == tclass2.charstyles().end()) {
 452                                 // The character style is undefined in tclass2
 453                                 inset.setUndefined();
 454                                 docstring const s = bformat(_(
 455                                         "Character style %1$s is "
 456                                         "undefined because of class "
 457                                         "conversion from\n%2$s to %3$s"),
 458                                          from_utf8(name), from_utf8(tclass1.name()),
 459                                          from_utf8(tclass2.name()));
 460                                 // To warn the user that something had to be done.
 461                                 errorlist.push_back(ErrorItem(
 462                                         _("Undefined character style"),
 463                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 464                         } else if (inset.undefined()) {
 465                                 // The character style is undefined in
 466                                 // tclass1 and is defined in tclass2
 467                                 inset.setDefined(found_cs);
 468                         }
 469                 }
 470         }
 471 }
 472
 473
 474 std::vector<docstring> const availableSelections(Buffer const & buffer)
 475 {
 476         vector<docstring> selList;
 477
 478         CutStack::const_iterator cit = theCuts.begin();
 479         CutStack::const_iterator end = theCuts.end();
 480         for (; cit != end; ++cit) {
 481                 // we do not use cit-> here because gcc 2.9x does not
 482                 // like it (JMarc)
 483                 ParagraphList const & pars = (*cit).first;
 484                 docstring asciiSel;
 485                 ParagraphList::const_iterator pit = pars.begin();
 486                 ParagraphList::const_iterator pend = pars.end();
 487                 for (; pit != pend; ++pit) {
 488                         asciiSel += pit->asString(buffer, false);
 489                         if (asciiSel.size() > 25) {
 490                                 asciiSel.replace(22, docstring::npos,
 491                                                  from_ascii("..."));
 492                                 break;
 493                         }
 494                 }
 495
 496                 selList.push_back(asciiSel);
 497         }
 498
 499         return selList;
 500 }
 501
 502
 503 size_type numberOfSelections()
 504 {
 505         return theCuts.size();
 506 }
 507
 508
 509 void cutSelection(LCursor & cur, bool doclear, bool realcut)
 510 {
 511         // This doesn't make sense, if there is no selection
 512         if (!cur.selection())
 513                 return;
 514
 515         // OK, we have a selection. This is always between cur.selBegin()
 516         // and cur.selEnd()
 517
 518         if (cur.inTexted()) {
 519                 LyXText * text = cur.text();
 520                 BOOST_ASSERT(text);
 521
 522                 // make sure that the depth behind the selection are restored, too
 523                 recordUndoSelection(cur);
 524                 pit_type begpit = cur.selBegin().pit();
 525                 pit_type endpit = cur.selEnd().pit();
 526
 527                 int endpos = cur.selEnd().pos();
 528
 529                 BufferParams const & bp = cur.buffer().params();
 530                 if (realcut) {
 531                         copySelectionHelper(cur.buffer(),
 532                                 text->paragraphs(),
 533                                 begpit, endpit,
 534                                 cur.selBegin().pos(), endpos,
 535                                 bp.textclass, theCuts);
 536                         // Stuff what we got on the clipboard.
 537                         // Even if there is no selection.
 538                         putClipboard(theCuts[0].first, theCuts[0].second,
 539                                 cur.selectionAsString(true));
 540                 }
 541
 542                 boost::tie(endpit, endpos) =
 543                         eraseSelectionHelper(bp,
 544                                 text->paragraphs(),
 545                                 begpit, endpit,
 546                                 cur.selBegin().pos(), endpos,
 547                                 doclear);
 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                 theSelection().haveSelection(false);
 564
 565                 // tell tabular that a recent copy happened
 566                 dirtyTabularStack(false);
 567         }
 568
 569         if (cur.inMathed()) {
 570                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 571                         // The current selection spans more than one cell.
 572                         // Record all cells
 573                         recordUndoInset(cur);
 574                 } else {
 575                         // Record only the current cell to avoid a jumping
 576                         // cursor after undo
 577                         recordUndo(cur);
 578                 }
 579                 if (realcut)
 580                         copySelection(cur);
 581                 eraseSelection(cur);
 582         }
 583 }
 584
 585
 586 void copySelection(LCursor & cur)
 587 {
 588         copySelection(cur, cur.selectionAsString(true));
 589 }
 590
 591
 592 namespace {
 593
 594 void copySelectionToStack(LCursor & cur, CutStack & cutstack)
 595 {
 596         // this doesn't make sense, if there is no selection
 597         if (!cur.selection())
 598                 return;
 599
 600         if (cur.inTexted()) {
 601                 LyXText * text = cur.text();
 602                 BOOST_ASSERT(text);
 603                 // ok we have a selection. This is always between cur.selBegin()
 604                 // and sel_end cursor
 605
 606                 // copy behind a space if there is one
 607                 ParagraphList & pars = text->paragraphs();
 608                 pos_type pos = cur.selBegin().pos();
 609                 pit_type par = cur.selBegin().pit();
 610                 while (pos < pars[par].size()
 611                                          && pars[par].isLineSeparator(pos)
 612                                          && (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 613                         ++pos;
 614
 615                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 616                         pos, cur.selEnd().pos(), cur.buffer().params().textclass, cutstack);
 617         }
 618
 619         if (cur.inMathed()) {
 620                 //lyxerr << "copySelection in mathed" << endl;
 621                 ParagraphList pars;
 622                 Paragraph par;
 623                 BufferParams const & bp = cur.buffer().params();
 624                 par.layout(bp.getLyXTextClass().defaultLayout());
 625                 par.insert(0, grabSelection(cur), LyXFont(), Change(Change::UNCHANGED));
 626                 pars.push_back(par);
 627                 cutstack.push(make_pair(pars, bp.textclass));
 628         }
 629 }
 630
 631 }
 632
 633
 634 void copySelectionToStack()
 635 {
 636         if (!selectionBuffer.empty())
 637                 theCuts.push(selectionBuffer[0]);
 638 }
 639
 640
 641 void copySelection(LCursor & cur, docstring const & plaintext)
 642 {
 643         copySelectionToStack(cur, theCuts);
 644
 645         // stuff the selection onto the X clipboard, from an explicit copy request
 646         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 647 }
 648
 649
 650 void saveSelection(LCursor & cur)
 651 {
 652         lyxerr[Debug::ACTION] << "cap::saveSelection: `"
 653                << to_utf8(cur.selectionAsString(true)) << "'." << endl;
 654
 655         if (cur.selection())
 656                 copySelectionToStack(cur, selectionBuffer);
 657         // tell X whether we now have a valid selection
 658         theSelection().haveSelection(cur.selection());
 659 }
 660
 661
 662 bool selection()
 663 {
 664         return !selectionBuffer.empty();
 665 }
 666
 667
 668 void clearSelection()
 669 {
 670         selectionBuffer.clear();
 671 }
 672
 673
 674 docstring getSelection(Buffer const & buf, size_t sel_index)
 675 {
 676         return sel_index < theCuts.size()
 677                 ? theCuts[sel_index].first.back().asString(buf, false)
 678                 : docstring();
 679 }
 680
 681
 682 void pasteParagraphList(LCursor & cur, ParagraphList const & parlist,
 683                         textclass_type textclass, ErrorList & errorList)
 684 {
 685         if (cur.inTexted()) {
 686                 LyXText * text = cur.text();
 687                 BOOST_ASSERT(text);
 688
 689                 pit_type endpit;
 690                 PitPosPair ppp;
 691
 692                 boost::tie(ppp, endpit) =
 693                         pasteSelectionHelper(cur, parlist,
 694                                              textclass, errorList);
 695                 updateLabels(cur.buffer());
 696                 cur.clearSelection();
 697                 text->setCursor(cur.top(), ppp.first, ppp.second);
 698         }
 699
 700         // mathed is handled in InsetMathNest/InsetMathGrid
 701         BOOST_ASSERT(!cur.inMathed());
 702 }
 703
 704
 705 void pasteFromStack(LCursor & cur, ErrorList & errorList, size_t sel_index)
 706 {
 707         // this does not make sense, if there is nothing to paste
 708         if (!checkPastePossible(sel_index))
 709                 return;
 710
 711         recordUndo(cur);
 712         pasteParagraphList(cur, theCuts[sel_index].first,
 713                            theCuts[sel_index].second, errorList);
 714         cur.setSelection();
 715         saveSelection(cur);
 716 }
 717
 718
 719 void pasteClipboard(LCursor & cur, ErrorList & errorList, bool asParagraphs)
 720 {
 721         // Use internal clipboard if it is the most recent one
 722         if (theClipboard().isInternal()) {
 723                 pasteClipboard(cur, errorList, 0);
 724                 return;
 725         }
 726
 727         // First try LyX format
 728         if (theClipboard().hasLyXContents()) {
 729                 string lyx = theClipboard().getAsLyX();
 730                 if (!lyx.empty()) {
 731                         Buffer buffer(string(), false);
 732                         buffer.setUnnamed(true);
 733                         if (buffer.readString(lyx)) {
 734                                 recordUndo(cur);
 735                                 pasteParagraphList(cur, buffer.paragraphs(),
 736                                         buffer.params().textclass, errorList);
 737                                 cur.setSelection();
 738                                 return;
 739                         }
 740                 }
 741         }
 742
 743         // Then try plain text
 744         docstring const text = theClipboard().getAsText();
 745         if (text.empty())
 746                 return;
 747         recordUndo(cur);
 748         if (asParagraphs)
 749                 cur.text()->insertStringAsParagraphs(cur, text);
 750         else
 751                 cur.text()->insertStringAsLines(cur, text);
 752 }
 753
 754
 755 void pasteSelection(LCursor & cur, ErrorList & errorList)
 756 {
 757         if (selectionBuffer.empty())
 758                 return;
 759         recordUndo(cur);
 760         pasteParagraphList(cur, selectionBuffer[0].first,
 761                            selectionBuffer[0].second, errorList);
 762         cur.setSelection();
 763 }
 764
 765
 766 void replaceSelectionWithString(LCursor & cur, docstring const & str, bool backwards)
 767 {
 768         recordUndo(cur);
 769         DocIterator selbeg = cur.selectionBegin();
 770
 771         // Get font setting before we cut
 772         LyXFont const font =
 773                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 774
 775         // Insert the new string
 776         pos_type pos = cur.selEnd().pos();
 777         Paragraph & par = cur.selEnd().paragraph();
 778         docstring::const_iterator cit = str.begin();
 779         docstring::const_iterator end = str.end();
 780         for (; cit != end; ++cit, ++pos)
 781                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 782
 783         // Cut the selection
 784         cutSelection(cur, true, false);
 785
 786         // select the replacement
 787         if (backwards) {
 788                 selbeg.pos() += str.length();
 789                 cur.setSelection(selbeg, -int(str.length()));
 790         } else
 791                 cur.setSelection(selbeg, str.length());
 792         saveSelection(cur);
 793 }
 794
 795
 796 void replaceSelection(LCursor & cur)
 797 {
 798         if (cur.selection())
 799                 cutSelection(cur, true, false);
 800 }
 801
 802
 803 void eraseSelection(LCursor & cur)
 804 {
 805         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 806         CursorSlice const & i1 = cur.selBegin();
 807         CursorSlice const & i2 = cur.selEnd();
 808         if (i1.inset().asInsetMath()) {
 809                 cur.top() = i1;
 810                 if (i1.idx() == i2.idx()) {
 811                         i1.cell().erase(i1.pos(), i2.pos());
 812                         // We may have deleted i1.cell(cur.pos()).
 813                         // Make sure that pos is valid.
 814                         if (cur.pos() > cur.lastpos())
 815                                 cur.pos() = cur.lastpos();
 816                 } else {
 817                         InsetMath * p = i1.asInsetMath();
 818                         InsetBase::row_type r1, r2;
 819                         InsetBase::col_type c1, c2;
 820                         region(i1, i2, r1, r2, c1, c2);
 821                         for (InsetBase::row_type row = r1; row <= r2; ++row)
 822                                 for (InsetBase::col_type col = c1; col <= c2; ++col)
 823                                         p->cell(p->index(row, col)).clear();
 824                         // We've deleted the whole cell. Only pos 0 is valid.
 825                         cur.pos() = 0;
 826                 }
 827                 // need a valid cursor. (Lgb)
 828                 cur.clearSelection();
 829                 theSelection().haveSelection(false);
 830         } else {
 831                 lyxerr << "can't erase this selection 1" << endl;
 832         }
 833         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 834 }
 835
 836
 837 void selDel(LCursor & cur)
 838 {
 839         //lyxerr << "cap::selDel" << endl;
 840         if (cur.selection())
 841                 eraseSelection(cur);
 842 }
 843
 844
 845 void selClearOrDel(LCursor & cur)
 846 {
 847         //lyxerr << "cap::selClearOrDel" << endl;
 848         if (lyxrc.auto_region_delete)
 849                 selDel(cur);
 850         else
 851                 cur.selection() = false;
 852 }
 853
 854
 855 docstring grabSelection(LCursor const & cur)
 856 {
 857         if (!cur.selection())
 858                 return docstring();
 859
 860         // FIXME: What is wrong with the following?
 861 #if 0
 862         std::ostringstream os;
 863         for (DocIterator dit = cur.selectionBegin();
 864              dit != cur.selectionEnd(); dit.forwardPos())
 865                 os << asString(dit.cell());
 866         return os.str();
 867 #endif
 868
 869         CursorSlice i1 = cur.selBegin();
 870         CursorSlice i2 = cur.selEnd();
 871
 872         if (i1.idx() == i2.idx()) {
 873                 if (i1.inset().asInsetMath()) {
 874                         MathArray::const_iterator it = i1.cell().begin();
 875                         return asString(MathArray(it + i1.pos(), it + i2.pos()));
 876                 } else {
 877                         return from_ascii("unknown selection 1");
 878                 }
 879         }
 880
 881         InsetBase::row_type r1, r2;
 882         InsetBase::col_type c1, c2;
 883         region(i1, i2, r1, r2, c1, c2);
 884
 885         docstring data;
 886         if (i1.inset().asInsetMath()) {
 887                 for (InsetBase::row_type row = r1; row <= r2; ++row) {
 888                         if (row > r1)
 889                                 data += "\\\\";
 890                         for (InsetBase::col_type col = c1; col <= c2; ++col) {
 891                                 if (col > c1)
 892                                         data += '&';
 893                                 data += asString(i1.asInsetMath()->
 894                                         cell(i1.asInsetMath()->index(row, col)));
 895                         }
 896                 }
 897         } else {
 898                 data = from_ascii("unknown selection 2");
 899         }
 900         return data;
 901 }
 902
 903
 904 void dirtyTabularStack(bool b)
 905 {
 906         dirty_tabular_stack_ = b;
 907 }
 908
 909
 910 bool tabularStackDirty()
 911 {
 912         return dirty_tabular_stack_;
 913 }
 914
 915
 916 } // namespace cap
 917
 918 } // namespace lyx