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         // 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 beginning
 361         // of the first paragraph. Keep this order - there may only be one paragraph!
 362         // Do not track deletions here; this is an internal action not visible to the user
 363         Paragraph & back = copy_pars.back();
 364         back.eraseChars(end, back.size(), false);
 365         Paragraph & front = copy_pars.front();
 366         front.eraseChars(0, start, false);
 367
 368         ParagraphList::iterator it = copy_pars.begin();
 369         ParagraphList::iterator it_end = copy_pars.end();
 370
 371         for (; it != it_end; it++) {
 372                 // ERT paragraphs have the Language latex_language.
 373                 // This is invalid outside of ERT, so we need to change it
 374                 // to the buffer language.
 375                 if (it->ownerCode() == InsetBase::ERT_CODE) {
 376                         it->changeLanguage(buf.params(), latex_language,
 377                                            buf.getLanguage());
 378                 }
 379                 it->setInsetOwner(0);
 380         }
 381
 382         // do not copy text (also nested in insets) which is marked as deleted
 383         // acceptChanges() is defined for LyXText rather than ParagraphList
 384         // Thus we must wrap copy_pars into a LyXText object and cross our fingers
 385         LyXText lt;
 386         copy_pars.swap(lt.paragraphs());
 387         lt.acceptChanges(buf.params());
 388         copy_pars.swap(lt.paragraphs());
 389
 390         cutstack.push(make_pair(copy_pars, tc));
 391 }
 392
 393 } // namespace anon
 394
 395
 396
 397
 398 namespace cap {
 399
 400 docstring grabAndEraseSelection(LCursor & cur)
 401 {
 402         if (!cur.selection())
 403                 return docstring();
 404         docstring res = grabSelection(cur);
 405         eraseSelection(cur);
 406         return res;
 407 }
 408
 409
 410 void switchBetweenClasses(textclass_type c1, textclass_type c2,
 411         InsetText & in, ErrorList & errorlist)
 412 {
 413         BOOST_ASSERT(!in.paragraphs().empty());
 414         if (c1 == c2)
 415                 return;
 416
 417         LyXTextClass const & tclass1 = textclasslist[c1];
 418         LyXTextClass const & tclass2 = textclasslist[c2];
 419
 420         // layouts
 421         ParIterator end = par_iterator_end(in);
 422         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 423                 string const name = it->layout()->name();
 424                 bool hasLayout = tclass2.hasLayout(name);
 425
 426                 if (hasLayout)
 427                         it->layout(tclass2[name]);
 428                 else
 429                         it->layout(tclass2.defaultLayout());
 430
 431                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 432                         docstring const s = bformat(
 433                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 434                                                 "because of class conversion from\n%3$s to %4$s"),
 435                          from_utf8(name), from_utf8(it->layout()->name()),
 436                          from_utf8(tclass1.name()), from_utf8(tclass2.name()));
 437                         // To warn the user that something had to be done.
 438                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 439                                                       it->id(), 0,
 440                                                       it->size()));
 441                 }
 442         }
 443
 444         // character styles
 445         InsetIterator const i_end = inset_iterator_end(in);
 446         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 447                 if (it->lyxCode() == InsetBase::CHARSTYLE_CODE) {
 448                         InsetCharStyle & inset =
 449                                 static_cast<InsetCharStyle &>(*it);
 450                         string const name = inset.params().type;
 451                         CharStyles::iterator const found_cs =
 452                                 tclass2.charstyle(name);
 453                         if (found_cs == tclass2.charstyles().end()) {
 454                                 // The character style is undefined in tclass2
 455                                 inset.setUndefined();
 456                                 docstring const s = bformat(_(
 457                                         "Character style %1$s is "
 458                                         "undefined because of class "
 459                                         "conversion from\n%2$s to %3$s"),
 460                                          from_utf8(name), from_utf8(tclass1.name()),
 461                                          from_utf8(tclass2.name()));
 462                                 // To warn the user that something had to be done.
 463                                 errorlist.push_back(ErrorItem(
 464                                         _("Undefined character style"),
 465                                         s, it.paragraph().id(), it.pos(), it.pos() + 1));
 466                         } else if (inset.undefined()) {
 467                                 // The character style is undefined in
 468                                 // tclass1 and is defined in tclass2
 469                                 inset.setDefined(found_cs);
 470                         }
 471                 }
 472         }
 473 }
 474
 475
 476 std::vector<docstring> const availableSelections(Buffer const & buffer)
 477 {
 478         vector<docstring> selList;
 479
 480         CutStack::const_iterator cit = theCuts.begin();
 481         CutStack::const_iterator end = theCuts.end();
 482         for (; cit != end; ++cit) {
 483                 // we do not use cit-> here because gcc 2.9x does not
 484                 // like it (JMarc)
 485                 ParagraphList const & pars = (*cit).first;
 486                 docstring asciiSel;
 487                 ParagraphList::const_iterator pit = pars.begin();
 488                 ParagraphList::const_iterator pend = pars.end();
 489                 for (; pit != pend; ++pit) {
 490                         asciiSel += pit->asString(buffer, false);
 491                         if (asciiSel.size() > 25) {
 492                                 asciiSel.replace(22, docstring::npos,
 493                                                  from_ascii("..."));
 494                                 break;
 495                         }
 496                 }
 497
 498                 selList.push_back(asciiSel);
 499         }
 500
 501         return selList;
 502 }
 503
 504
 505 size_type numberOfSelections()
 506 {
 507         return theCuts.size();
 508 }
 509
 510
 511 void cutSelection(LCursor & cur, bool doclear, bool realcut)
 512 {
 513         // This doesn't make sense, if there is no selection
 514         if (!cur.selection())
 515                 return;
 516
 517         // OK, we have a selection. This is always between cur.selBegin()
 518         // and cur.selEnd()
 519
 520         if (cur.inTexted()) {
 521                 LyXText * text = cur.text();
 522                 BOOST_ASSERT(text);
 523
 524                 // make sure that the depth behind the selection are restored, too
 525                 recordUndoSelection(cur);
 526                 pit_type begpit = cur.selBegin().pit();
 527                 pit_type endpit = cur.selEnd().pit();
 528
 529                 int endpos = cur.selEnd().pos();
 530
 531                 BufferParams const & bp = cur.buffer().params();
 532                 if (realcut) {
 533                         copySelectionHelper(cur.buffer(),
 534                                 text->paragraphs(),
 535                                 begpit, endpit,
 536                                 cur.selBegin().pos(), endpos,
 537                                 bp.textclass, theCuts);
 538                         // Stuff what we got on the clipboard.
 539                         // Even if there is no selection.
 540                         putClipboard(theCuts[0].first, theCuts[0].second,
 541                                 cur.selectionAsString(true));
 542                 }
 543
 544                 boost::tie(endpit, endpos) =
 545                         eraseSelectionHelper(bp,
 546                                 text->paragraphs(),
 547                                 begpit, endpit,
 548                                 cur.selBegin().pos(), endpos,
 549                                 doclear);
 550
 551                 // cutSelection can invalidate the cursor so we need to set
 552                 // it anew. (Lgb)
 553                 // we prefer the end for when tracking changes
 554                 cur.pos() = endpos;
 555                 cur.pit() = endpit;
 556
 557                 // sometimes necessary
 558                 if (doclear
 559                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 560                         cur.fixIfBroken();
 561
 562                 // need a valid cursor. (Lgb)
 563                 cur.clearSelection();
 564                 updateLabels(cur.buffer());
 565                 theSelection().haveSelection(false);
 566
 567                 // tell tabular that a recent copy happened
 568                 dirtyTabularStack(false);
 569         }
 570
 571         if (cur.inMathed()) {
 572                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 573                         // The current selection spans more than one cell.
 574                         // Record all cells
 575                         recordUndoInset(cur);
 576                 } else {
 577                         // Record only the current cell to avoid a jumping
 578                         // cursor after undo
 579                         recordUndo(cur);
 580                 }
 581                 if (realcut)
 582                         copySelection(cur);
 583                 eraseSelection(cur);
 584         }
 585 }
 586
 587
 588 void copySelection(LCursor & cur)
 589 {
 590         copySelection(cur, cur.selectionAsString(true));
 591 }
 592
 593
 594 namespace {
 595
 596 void copySelectionToStack(LCursor & cur, CutStack & cutstack)
 597 {
 598         // this doesn't make sense, if there is no selection
 599         if (!cur.selection())
 600                 return;
 601
 602         if (cur.inTexted()) {
 603                 LyXText * text = cur.text();
 604                 BOOST_ASSERT(text);
 605                 // ok we have a selection. This is always between cur.selBegin()
 606                 // and sel_end cursor
 607
 608                 // copy behind a space if there is one
 609                 ParagraphList & pars = text->paragraphs();
 610                 pos_type pos = cur.selBegin().pos();
 611                 pit_type par = cur.selBegin().pit();
 612                 while (pos < pars[par].size() &&
 613                        pars[par].isLineSeparator(pos) &&
 614                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 615                         ++pos;
 616
 617                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 618                         pos, cur.selEnd().pos(), cur.buffer().params().textclass, cutstack);
 619         }
 620
 621         if (cur.inMathed()) {
 622                 //lyxerr << "copySelection in mathed" << endl;
 623                 ParagraphList pars;
 624                 Paragraph par;
 625                 BufferParams const & bp = cur.buffer().params();
 626                 par.layout(bp.getLyXTextClass().defaultLayout());
 627                 par.insert(0, grabSelection(cur), LyXFont(), Change(Change::UNCHANGED));
 628                 pars.push_back(par);
 629                 cutstack.push(make_pair(pars, bp.textclass));
 630         }
 631 }
 632
 633 }
 634
 635
 636 void copySelectionToStack()
 637 {
 638         if (!selectionBuffer.empty())
 639                 theCuts.push(selectionBuffer[0]);
 640 }
 641
 642
 643 void copySelection(LCursor & cur, docstring const & plaintext)
 644 {
 645         copySelectionToStack(cur, theCuts);
 646
 647         // stuff the selection onto the X clipboard, from an explicit copy request
 648         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 649 }
 650
 651
 652 void saveSelection(LCursor & cur)
 653 {
 654         if (lyxerr.debugging(Debug::ACTION))
 655                 lyxerr << BOOST_CURRENT_FUNCTION << ": `"
 656                        << to_utf8(cur.selectionAsString(true)) << "'."
 657                        << endl;
 658
 659         if (cur.selection())
 660                 copySelectionToStack(cur, selectionBuffer);
 661         // tell X whether we now have a valid selection
 662         theSelection().haveSelection(cur.selection());
 663 }
 664
 665
 666 bool selection()
 667 {
 668         return !selectionBuffer.empty();
 669 }
 670
 671
 672 void clearSelection()
 673 {
 674         selectionBuffer.clear();
 675 }
 676
 677
 678 docstring getSelection(Buffer const & buf, size_t sel_index)
 679 {
 680         return sel_index < theCuts.size()
 681                 ? theCuts[sel_index].first.back().asString(buf, false)
 682                 : docstring();
 683 }
 684
 685
 686 void pasteParagraphList(LCursor & cur, ParagraphList const & parlist,
 687                         textclass_type textclass, ErrorList & errorList)
 688 {
 689         if (cur.inTexted()) {
 690                 LyXText * text = cur.text();
 691                 BOOST_ASSERT(text);
 692
 693                 pit_type endpit;
 694                 PitPosPair ppp;
 695
 696                 boost::tie(ppp, endpit) =
 697                         pasteSelectionHelper(cur, parlist,
 698                                              textclass, errorList);
 699                 updateLabels(cur.buffer());
 700                 cur.clearSelection();
 701                 text->setCursor(cur.top(), ppp.first, ppp.second);
 702         }
 703
 704         // mathed is handled in InsetMathNest/InsetMathGrid
 705         BOOST_ASSERT(!cur.inMathed());
 706 }
 707
 708
 709 void pasteFromStack(LCursor & cur, ErrorList & errorList, size_t sel_index)
 710 {
 711         // this does not make sense, if there is nothing to paste
 712         if (!checkPastePossible(sel_index))
 713                 return;
 714
 715         recordUndo(cur);
 716         pasteParagraphList(cur, theCuts[sel_index].first,
 717                            theCuts[sel_index].second, errorList);
 718         cur.setSelection();
 719         saveSelection(cur);
 720 }
 721
 722
 723 void pasteClipboard(LCursor & cur, ErrorList & errorList, bool asParagraphs)
 724 {
 725         // Use internal clipboard if it is the most recent one
 726         if (theClipboard().isInternal()) {
 727                 pasteFromStack(cur, errorList, 0);
 728                 return;
 729         }
 730
 731         // First try LyX format
 732         if (theClipboard().hasLyXContents()) {
 733                 string lyx = theClipboard().getAsLyX();
 734                 if (!lyx.empty()) {
 735                         // For some strange reason gcc 3.2 and 3.3 do not accept
 736                         // Buffer buffer(string(), false);
 737                         Buffer buffer("", false);
 738                         buffer.setUnnamed(true);
 739                         if (buffer.readString(lyx)) {
 740                                 recordUndo(cur);
 741                                 pasteParagraphList(cur, buffer.paragraphs(),
 742                                         buffer.params().textclass, errorList);
 743                                 cur.setSelection();
 744                                 return;
 745                         }
 746                 }
 747         }
 748
 749         // Then try plain text
 750         docstring const text = theClipboard().getAsText();
 751         if (text.empty())
 752                 return;
 753         recordUndo(cur);
 754         if (asParagraphs)
 755                 cur.text()->insertStringAsParagraphs(cur, text);
 756         else
 757                 cur.text()->insertStringAsLines(cur, text);
 758 }
 759
 760
 761 void pasteSelection(LCursor & cur, ErrorList & errorList)
 762 {
 763         if (selectionBuffer.empty())
 764                 return;
 765         recordUndo(cur);
 766         pasteParagraphList(cur, selectionBuffer[0].first,
 767                            selectionBuffer[0].second, errorList);
 768         cur.setSelection();
 769 }
 770
 771
 772 void replaceSelectionWithString(LCursor & cur, docstring const & str, bool backwards)
 773 {
 774         recordUndo(cur);
 775         DocIterator selbeg = cur.selectionBegin();
 776
 777         // Get font setting before we cut
 778         LyXFont const font =
 779                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 780
 781         // Insert the new string
 782         pos_type pos = cur.selEnd().pos();
 783         Paragraph & par = cur.selEnd().paragraph();
 784         docstring::const_iterator cit = str.begin();
 785         docstring::const_iterator end = str.end();
 786         for (; cit != end; ++cit, ++pos)
 787                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 788
 789         // Cut the selection
 790         cutSelection(cur, true, false);
 791
 792         // select the replacement
 793         if (backwards) {
 794                 selbeg.pos() += str.length();
 795                 cur.setSelection(selbeg, -int(str.length()));
 796         } else
 797                 cur.setSelection(selbeg, str.length());
 798         saveSelection(cur);
 799 }
 800
 801
 802 void replaceSelection(LCursor & cur)
 803 {
 804         if (cur.selection())
 805                 cutSelection(cur, true, false);
 806 }
 807
 808
 809 void eraseSelection(LCursor & cur)
 810 {
 811         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 812         CursorSlice const & i1 = cur.selBegin();
 813         CursorSlice const & i2 = cur.selEnd();
 814         if (i1.inset().asInsetMath()) {
 815                 cur.top() = i1;
 816                 if (i1.idx() == i2.idx()) {
 817                         i1.cell().erase(i1.pos(), i2.pos());
 818                         // We may have deleted i1.cell(cur.pos()).
 819                         // Make sure that pos is valid.
 820                         if (cur.pos() > cur.lastpos())
 821                                 cur.pos() = cur.lastpos();
 822                 } else {
 823                         InsetMath * p = i1.asInsetMath();
 824                         InsetBase::row_type r1, r2;
 825                         InsetBase::col_type c1, c2;
 826                         region(i1, i2, r1, r2, c1, c2);
 827                         for (InsetBase::row_type row = r1; row <= r2; ++row)
 828                                 for (InsetBase::col_type col = c1; col <= c2; ++col)
 829                                         p->cell(p->index(row, col)).clear();
 830                         // We've deleted the whole cell. Only pos 0 is valid.
 831                         cur.pos() = 0;
 832                 }
 833                 // need a valid cursor. (Lgb)
 834                 cur.clearSelection();
 835                 theSelection().haveSelection(false);
 836         } else {
 837                 lyxerr << "can't erase this selection 1" << endl;
 838         }
 839         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 840 }
 841
 842
 843 void selDel(LCursor & cur)
 844 {
 845         //lyxerr << "cap::selDel" << endl;
 846         if (cur.selection())
 847                 eraseSelection(cur);
 848 }
 849
 850
 851 void selClearOrDel(LCursor & cur)
 852 {
 853         //lyxerr << "cap::selClearOrDel" << endl;
 854         if (lyxrc.auto_region_delete)
 855                 selDel(cur);
 856         else
 857                 cur.selection() = false;
 858 }
 859
 860
 861 docstring grabSelection(LCursor const & cur)
 862 {
 863         if (!cur.selection())
 864                 return docstring();
 865
 866         // FIXME: What is wrong with the following?
 867 #if 0
 868         std::ostringstream os;
 869         for (DocIterator dit = cur.selectionBegin();
 870              dit != cur.selectionEnd(); dit.forwardPos())
 871                 os << asString(dit.cell());
 872         return os.str();
 873 #endif
 874
 875         CursorSlice i1 = cur.selBegin();
 876         CursorSlice i2 = cur.selEnd();
 877
 878         if (i1.idx() == i2.idx()) {
 879                 if (i1.inset().asInsetMath()) {
 880                         MathArray::const_iterator it = i1.cell().begin();
 881                         return asString(MathArray(it + i1.pos(), it + i2.pos()));
 882                 } else {
 883                         return from_ascii("unknown selection 1");
 884                 }
 885         }
 886
 887         InsetBase::row_type r1, r2;
 888         InsetBase::col_type c1, c2;
 889         region(i1, i2, r1, r2, c1, c2);
 890
 891         docstring data;
 892         if (i1.inset().asInsetMath()) {
 893                 for (InsetBase::row_type row = r1; row <= r2; ++row) {
 894                         if (row > r1)
 895                                 data += "\\\\";
 896                         for (InsetBase::col_type col = c1; col <= c2; ++col) {
 897                                 if (col > c1)
 898                                         data += '&';
 899                                 data += asString(i1.asInsetMath()->
 900                                         cell(i1.asInsetMath()->index(row, col)));
 901                         }
 902                 }
 903         } else {
 904                 data = from_ascii("unknown selection 2");
 905         }
 906         return data;
 907 }
 908
 909
 910 void dirtyTabularStack(bool b)
 911 {
 912         dirty_tabular_stack_ = b;
 913 }
 914
 915
 916 bool tabularStackDirty()
 917 {
 918         return dirty_tabular_stack_;
 919 }
 920
 921
 922 } // namespace cap
 923
 924 } // namespace lyx