src/CutAndPaste.cpp

   1 /*
   2  * \file CutAndPaste.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Jürgen Vigna
   7  * \author Lars Gullik Bjønnes
   8  * \author Alfredo Braunstein
   9  * \author Michael Gerz
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "CutAndPaste.h"
  17
  18 #include "Buffer.h"
  19 #include "buffer_funcs.h"
  20 #include "BufferParams.h"
  21 #include "BufferView.h"
  22 #include "Changes.h"
  23 #include "Cursor.h"
  24 #include "ErrorList.h"
  25 #include "FuncRequest.h"
  26 #include "InsetIterator.h"
  27 #include "InsetList.h"
  28 #include "Language.h"
  29 #include "lfuns.h"
  30 #include "LyXFunc.h"
  31 #include "LyXRC.h"
  32 #include "Text.h"
  33 #include "TextClassList.h"
  34 #include "Paragraph.h"
  35 #include "paragraph_funcs.h"
  36 #include "ParagraphParameters.h"
  37 #include "ParIterator.h"
  38 #include "Undo.h"
  39
  40 #include "insets/InsetFlex.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/debug.h"
  48 #include "support/docstream.h"
  49 #include "support/gettext.h"
  50 #include "support/limited_stack.h"
  51 #include "support/lstrings.h"
  52
  53 #include "frontends/Clipboard.h"
  54 #include "frontends/Selection.h"
  55
  56 #include <boost/tuple/tuple.hpp>
  57 #include <boost/next_prior.hpp>
  58
  59 #include <string>
  60
  61 using namespace std;
  62
  63 namespace lyx {
  64
  65 using support::bformat;
  66 using frontend::Clipboard;
  67
  68 namespace {
  69
  70 typedef std::pair<pit_type, int> PitPosPair;
  71
  72 typedef limited_stack<pair<ParagraphList, TextClassPtr> > CutStack;
  73
  74 CutStack theCuts(10);
  75 // persistent selection, cleared until the next selection
  76 CutStack selectionBuffer(1);
  77
  78 // store whether the tabular stack is newer than the normal copy stack
  79 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  80 // when we (hopefully) have a one-for-all paste mechanism.
  81 bool dirty_tabular_stack_ = false;
  82
  83
  84 void region(CursorSlice const & i1, CursorSlice const & i2,
  85         Inset::row_type & r1, Inset::row_type & r2,
  86         Inset::col_type & c1, Inset::col_type & c2)
  87 {
  88         Inset & p = i1.inset();
  89         c1 = p.col(i1.idx());
  90         c2 = p.col(i2.idx());
  91         if (c1 > c2)
  92                 std::swap(c1, c2);
  93         r1 = p.row(i1.idx());
  94         r2 = p.row(i2.idx());
  95         if (r1 > r2)
  96                 std::swap(r1, r2);
  97 }
  98
  99
 100 bool checkPastePossible(int index)
 101 {
 102         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
 103 }
 104
 105
 106 pair<PitPosPair, pit_type>
 107 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
 108                      TextClassPtr textclass, ErrorList & errorlist)
 109 {
 110         Buffer const & buffer = cur.buffer();
 111         pit_type pit = cur.pit();
 112         pos_type pos = cur.pos();
 113         ParagraphList & pars = cur.text()->paragraphs();
 114
 115         if (parlist.empty())
 116                 return make_pair(PitPosPair(pit, pos), pit);
 117
 118         BOOST_ASSERT (pos <= pars[pit].size());
 119
 120         // Make a copy of the CaP paragraphs.
 121         ParagraphList insertion = parlist;
 122         TextClassPtr const tc = buffer.params().getTextClassPtr();
 123
 124         // Now remove all out of the pars which is NOT allowed in the
 125         // new environment and set also another font if that is required.
 126
 127         // Convert newline to paragraph break in ERT inset.
 128         // This should not be here!
 129         if (pars[pit].inInset() &&
 130             (pars[pit].inInset()->lyxCode() == ERT_CODE ||
 131                 pars[pit].inInset()->lyxCode() == LISTINGS_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                 LayoutPtr 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->isInset(i) &&
 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 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)
 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 right = (pit == endpit ? endpos : pars[pit].size() + 1);
 304                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 305
 306                 // Logically erase only, including the end-of-paragraph character
 307                 pars[pit].eraseChars(left, right, params.trackChanges);
 308
 309                 // Separate handling of paragraph break:
 310                 if (merge && pit != endpit &&
 311                     (pit + 1 != endpit || pars[pit].hasSameLayout(pars[endpit]))) {
 312                         if (pit + 1 == endpit)
 313                                 endpos += pars[pit].size();
 314                         mergeParagraph(params, pars, pit);
 315                         --endpit;
 316                 } else
 317                         ++pit;
 318         }
 319
 320         // Ensure legal cursor pos:
 321         endpit = startpit;
 322         endpos = startpos;
 323         return PitPosPair(endpit, endpos);
 324 }
 325
 326
 327 void putClipboard(ParagraphList const & paragraphs, TextClassPtr textclass,
 328                   docstring const & plaintext)
 329 {
 330         // For some strange reason gcc 3.2 and 3.3 do not accept
 331         // Buffer buffer(string(), false);
 332         Buffer buffer("", false);
 333         buffer.setUnnamed(true);
 334         buffer.paragraphs() = paragraphs;
 335         buffer.params().setTextClass(textclass);
 336         std::ostringstream lyx;
 337         if (buffer.write(lyx))
 338                 theClipboard().put(lyx.str(), plaintext);
 339         else
 340                 theClipboard().put(string(), plaintext);
 341 }
 342
 343
 344 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 345         pit_type startpit, pit_type endpit,
 346         int start, int end, TextClassPtr tc, CutStack & cutstack)
 347 {
 348         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 349         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 350         BOOST_ASSERT(startpit != endpit || start <= end);
 351
 352         // Clone the paragraphs within the selection.
 353         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 354                                 boost::next(pars.begin(), endpit + 1));
 355
 356         // Remove the end of the last paragraph; afterwards, remove the
 357         // beginning of the first paragraph. Keep this order - there may only
 358         // be one paragraph!  Do not track deletions here; this is an internal
 359         // action not visible to the user
 360
 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() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 374                         it->changeLanguage(buf.params(), latex_language, buf.language());
 375                 }
 376                 it->setInsetOwner(0);
 377         }
 378
 379         // do not copy text (also nested in insets) which is marked as deleted
 380         acceptChanges(copy_pars, buf.params());
 381
 382         cutstack.push(make_pair(copy_pars, tc));
 383 }
 384
 385 } // namespace anon
 386
 387
 388
 389
 390 namespace cap {
 391
 392 docstring grabAndEraseSelection(Cursor & cur)
 393 {
 394         if (!cur.selection())
 395                 return docstring();
 396         docstring res = grabSelection(cur);
 397         eraseSelection(cur);
 398         return res;
 399 }
 400
 401
 402 void switchBetweenClasses(TextClassPtr const & c1,
 403         TextClassPtr const & c2, InsetText & in, ErrorList & errorlist)
 404 {
 405         errorlist.clear();
 406
 407         BOOST_ASSERT(!in.paragraphs().empty());
 408         if (c1 == c2)
 409                 return;
 410
 411         TextClass const & tclass1 = *c1;
 412         TextClass const & tclass2 = *c2;
 413
 414         // layouts
 415         ParIterator end = par_iterator_end(in);
 416         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 417                 docstring const name = it->layout()->name();
 418                 bool hasLayout = tclass2.hasLayout(name);
 419
 420                 if (hasLayout)
 421                         it->layout(tclass2[name]);
 422                 else
 423                         it->layout(tclass2.defaultLayout());
 424
 425                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 426                         docstring const s = bformat(
 427                                                  _("Layout had to be changed from\n%1$s to %2$s\n"
 428                                                 "because of class conversion from\n%3$s to %4$s"),
 429                          name, it->layout()->name(),
 430                          from_utf8(tclass1.name()), from_utf8(tclass2.name()));
 431                         // To warn the user that something had to be done.
 432                         errorlist.push_back(ErrorItem(_("Changed Layout"), s,
 433                                                       it->id(), 0,
 434                                                       it->size()));
 435                 }
 436         }
 437
 438         // character styles
 439         InsetIterator const i_end = inset_iterator_end(in);
 440         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 441                 InsetCollapsable * inset = it->asInsetCollapsable();
 442                 if (!inset)
 443                         continue;
 444                 if (inset->lyxCode() != FLEX_CODE)
 445                         // FIXME: Should we verify all InsetCollapsable?
 446                         continue;
 447                 docstring const name = inset->name();
 448                 InsetLayout const & il = tclass2.insetlayout(name);
 449                 inset->setLayout(il);
 450                 if (il.labelstring != from_utf8("UNDEFINED"))
 451                         continue;
 452                 // The flex inset is undefined in tclass2
 453                 docstring const s = bformat(_(
 454                         "Flex inset %1$s is "
 455                         "undefined because of class "
 456                         "conversion from\n%2$s to %3$s"),
 457                         name, from_utf8(tclass1.name()),
 458                         from_utf8(tclass2.name()));
 459                 // To warn the user that something had to be done.
 460                 errorlist.push_back(ErrorItem(
 461                                 _("Undefined flex inset"),
 462                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 463         }
 464 }
 465
 466
 467 std::vector<docstring> const availableSelections(Buffer const & buffer)
 468 {
 469         vector<docstring> selList;
 470
 471         CutStack::const_iterator cit = theCuts.begin();
 472         CutStack::const_iterator end = theCuts.end();
 473         for (; cit != end; ++cit) {
 474                 // we do not use cit-> here because gcc 2.9x does not
 475                 // like it (JMarc)
 476                 ParagraphList const & pars = (*cit).first;
 477                 docstring asciiSel;
 478                 ParagraphList::const_iterator pit = pars.begin();
 479                 ParagraphList::const_iterator pend = pars.end();
 480                 for (; pit != pend; ++pit) {
 481                         asciiSel += pit->asString(buffer, false);
 482                         if (asciiSel.size() > 25) {
 483                                 asciiSel.replace(22, docstring::npos,
 484                                                  from_ascii("..."));
 485                                 break;
 486                         }
 487                 }
 488
 489                 selList.push_back(asciiSel);
 490         }
 491
 492         return selList;
 493 }
 494
 495
 496 size_type numberOfSelections()
 497 {
 498         return theCuts.size();
 499 }
 500
 501
 502 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 503 {
 504         // This doesn't make sense, if there is no selection
 505         if (!cur.selection())
 506                 return;
 507
 508         // OK, we have a selection. This is always between cur.selBegin()
 509         // and cur.selEnd()
 510
 511         if (cur.inTexted()) {
 512                 Text * text = cur.text();
 513                 BOOST_ASSERT(text);
 514
 515                 saveSelection(cur);
 516
 517                 // make sure that the depth behind the selection are restored, too
 518                 cur.recordUndoSelection();
 519                 pit_type begpit = cur.selBegin().pit();
 520                 pit_type endpit = cur.selEnd().pit();
 521
 522                 int endpos = cur.selEnd().pos();
 523
 524                 BufferParams const & bp = cur.buffer().params();
 525                 if (realcut) {
 526                         copySelectionHelper(cur.buffer(),
 527                                 text->paragraphs(),
 528                                 begpit, endpit,
 529                                 cur.selBegin().pos(), endpos,
 530                                 bp.getTextClassPtr(), theCuts);
 531                         // Stuff what we got on the clipboard.
 532                         // Even if there is no selection.
 533                         putClipboard(theCuts[0].first, theCuts[0].second,
 534                                 cur.selectionAsString(true));
 535                 }
 536
 537                 boost::tie(endpit, endpos) =
 538                         eraseSelectionHelper(bp,
 539                                 text->paragraphs(),
 540                                 begpit, endpit,
 541                                 cur.selBegin().pos(), endpos);
 542
 543                 // cutSelection can invalidate the cursor so we need to set
 544                 // it anew. (Lgb)
 545                 // we prefer the end for when tracking changes
 546                 cur.pos() = endpos;
 547                 cur.pit() = endpit;
 548
 549                 // sometimes necessary
 550                 if (doclear
 551                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 552                         cur.fixIfBroken();
 553
 554                 // need a valid cursor. (Lgb)
 555                 cur.clearSelection();
 556                 updateLabels(cur.buffer());
 557
 558                 // tell tabular that a recent copy happened
 559                 dirtyTabularStack(false);
 560         }
 561
 562         if (cur.inMathed()) {
 563                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 564                         // The current selection spans more than one cell.
 565                         // Record all cells
 566                         cur.recordUndoInset();
 567                 } else {
 568                         // Record only the current cell to avoid a jumping
 569                         // cursor after undo
 570                         cur.recordUndo();
 571                 }
 572                 if (realcut)
 573                         copySelection(cur);
 574                 eraseSelection(cur);
 575         }
 576 }
 577
 578
 579 void copySelection(Cursor & cur)
 580 {
 581         copySelection(cur, cur.selectionAsString(true));
 582 }
 583
 584
 585 namespace {
 586
 587 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 588 {
 589         // this doesn't make sense, if there is no selection
 590         if (!cur.selection())
 591                 return;
 592
 593         // copySelection can not yet handle the case of cross idx selection
 594         if (cur.selBegin().idx() != cur.selEnd().idx())
 595                 return;
 596
 597         if (cur.inTexted()) {
 598                 Text * text = cur.text();
 599                 BOOST_ASSERT(text);
 600                 // ok we have a selection. This is always between cur.selBegin()
 601                 // and sel_end cursor
 602
 603                 // copy behind a space if there is one
 604                 ParagraphList & pars = text->paragraphs();
 605                 pos_type pos = cur.selBegin().pos();
 606                 pit_type par = cur.selBegin().pit();
 607                 while (pos < pars[par].size() &&
 608                        pars[par].isLineSeparator(pos) &&
 609                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 610                         ++pos;
 611
 612                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 613                         pos, cur.selEnd().pos(),
 614                         cur.buffer().params().getTextClassPtr(), cutstack);
 615                 dirtyTabularStack(false);
 616         }
 617
 618         if (cur.inMathed()) {
 619                 //lyxerr << "copySelection in mathed" << endl;
 620                 ParagraphList pars;
 621                 Paragraph par;
 622                 BufferParams const & bp = cur.buffer().params();
 623                 par.layout(bp.getTextClass().defaultLayout());
 624                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 625                 pars.push_back(par);
 626                 cutstack.push(make_pair(pars, bp.getTextClassPtr()));
 627         }
 628 }
 629
 630 }
 631
 632
 633 void copySelectionToStack()
 634 {
 635         if (!selectionBuffer.empty())
 636                 theCuts.push(selectionBuffer[0]);
 637 }
 638
 639
 640 void copySelection(Cursor & cur, docstring const & plaintext)
 641 {
 642         // In tablemode, because copy and paste actually use special table stack
 643         // we do not attempt to get selected paragraphs under cursor. Instead, a
 644         // paragraph with the plain text version is generated so that table cells
 645         // can be pasted as pure text somewhere else.
 646         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 647                 ParagraphList pars;
 648                 Paragraph par;
 649                 BufferParams const & bp = cur.buffer().params();
 650                 par.layout(bp.getTextClass().defaultLayout());
 651                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 652                 pars.push_back(par);
 653                 theCuts.push(make_pair(pars, bp.getTextClassPtr()));
 654         } else {
 655                 copySelectionToStack(cur, theCuts);
 656         }
 657
 658         // stuff the selection onto the X clipboard, from an explicit copy request
 659         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 660 }
 661
 662
 663 void saveSelection(Cursor & cur)
 664 {
 665         // This function is called, not when a selection is formed, but when
 666         // a selection is cleared. Therefore, multiple keyboard selection
 667         // will not repeatively trigger this function (bug 3877).
 668         if (cur.selection()
 669             && cur.selBegin() == cur.bv().cursor().selBegin()
 670             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 671                 LYXERR(Debug::ACTION, "'" << cur.selectionAsString(true) << "'");
 672                 copySelectionToStack(cur, selectionBuffer);
 673         }
 674 }
 675
 676
 677 bool selection()
 678 {
 679         return !selectionBuffer.empty();
 680 }
 681
 682
 683 void clearSelection()
 684 {
 685         selectionBuffer.clear();
 686 }
 687
 688
 689 void clearCutStack()
 690 {
 691         theCuts.clear();
 692 }
 693
 694
 695 docstring getSelection(Buffer const & buf, size_t sel_index)
 696 {
 697         return sel_index < theCuts.size()
 698                 ? theCuts[sel_index].first.back().asString(buf, false)
 699                 : docstring();
 700 }
 701
 702
 703 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 704                         TextClassPtr textclass, ErrorList & errorList)
 705 {
 706         if (cur.inTexted()) {
 707                 Text * text = cur.text();
 708                 BOOST_ASSERT(text);
 709
 710                 pit_type endpit;
 711                 PitPosPair ppp;
 712
 713                 boost::tie(ppp, endpit) =
 714                         pasteSelectionHelper(cur, parlist,
 715                                              textclass, errorList);
 716                 updateLabels(cur.buffer());
 717                 cur.clearSelection();
 718                 text->setCursor(cur, ppp.first, ppp.second);
 719         }
 720
 721         // mathed is handled in InsetMathNest/InsetMathGrid
 722         BOOST_ASSERT(!cur.inMathed());
 723 }
 724
 725
 726 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 727 {
 728         // this does not make sense, if there is nothing to paste
 729         if (!checkPastePossible(sel_index))
 730                 return;
 731
 732         cur.recordUndo();
 733         pasteParagraphList(cur, theCuts[sel_index].first,
 734                            theCuts[sel_index].second, errorList);
 735         cur.setSelection();
 736 }
 737
 738
 739 void pasteClipboard(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 740 {
 741         // Use internal clipboard if it is the most recent one
 742         if (theClipboard().isInternal()) {
 743                 pasteFromStack(cur, errorList, 0);
 744                 return;
 745         }
 746
 747         // First try LyX format
 748         if (theClipboard().hasLyXContents()) {
 749                 string lyx = theClipboard().getAsLyX();
 750                 if (!lyx.empty()) {
 751                         // For some strange reason gcc 3.2 and 3.3 do not accept
 752                         // Buffer buffer(string(), false);
 753                         Buffer buffer("", false);
 754                         buffer.setUnnamed(true);
 755                         if (buffer.readString(lyx)) {
 756                                 cur.recordUndo();
 757                                 pasteParagraphList(cur, buffer.paragraphs(),
 758                                         buffer.params().getTextClassPtr(), errorList);
 759                                 cur.setSelection();
 760                                 return;
 761                         }
 762                 }
 763         }
 764
 765         // Then try plain text
 766         docstring const text = theClipboard().getAsText();
 767         if (text.empty())
 768                 return;
 769         cur.recordUndo();
 770         if (asParagraphs)
 771                 cur.text()->insertStringAsParagraphs(cur, text);
 772         else
 773                 cur.text()->insertStringAsLines(cur, text);
 774 }
 775
 776
 777 void pasteSelection(Cursor & cur, ErrorList & errorList)
 778 {
 779         if (selectionBuffer.empty())
 780                 return;
 781         cur.recordUndo();
 782         pasteParagraphList(cur, selectionBuffer[0].first,
 783                            selectionBuffer[0].second, errorList);
 784 }
 785
 786
 787 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 788 {
 789         cur.recordUndo();
 790         DocIterator selbeg = cur.selectionBegin();
 791
 792         // Get font setting before we cut
 793         Font const font =
 794                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 795
 796         // Insert the new string
 797         pos_type pos = cur.selEnd().pos();
 798         Paragraph & par = cur.selEnd().paragraph();
 799         docstring::const_iterator cit = str.begin();
 800         docstring::const_iterator end = str.end();
 801         for (; cit != end; ++cit, ++pos)
 802                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 803
 804         // Cut the selection
 805         cutSelection(cur, true, false);
 806
 807         // select the replacement
 808         if (backwards) {
 809                 selbeg.pos() += str.length();
 810                 cur.setSelection(selbeg, -int(str.length()));
 811         } else
 812                 cur.setSelection(selbeg, str.length());
 813 }
 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                 saveSelection(cur);
 830                 cur.top() = i1;
 831                 if (i1.idx() == i2.idx()) {
 832                         i1.cell().erase(i1.pos(), i2.pos());
 833                         // We may have deleted i1.cell(cur.pos()).
 834                         // Make sure that pos is valid.
 835                         if (cur.pos() > cur.lastpos())
 836                                 cur.pos() = cur.lastpos();
 837                 } else {
 838                         InsetMath * p = i1.asInsetMath();
 839                         Inset::row_type r1, r2;
 840                         Inset::col_type c1, c2;
 841                         region(i1, i2, r1, r2, c1, c2);
 842                         for (Inset::row_type row = r1; row <= r2; ++row)
 843                                 for (Inset::col_type col = c1; col <= c2; ++col)
 844                                         p->cell(p->index(row, col)).clear();
 845                         // We've deleted the whole cell. Only pos 0 is valid.
 846                         cur.pos() = 0;
 847                 }
 848                 // need a valid cursor. (Lgb)
 849                 cur.clearSelection();
 850         } 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