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 "BufferList.h"
  21 #include "BufferParams.h"
  22 #include "BufferView.h"
  23 #include "Changes.h"
  24 #include "Cursor.h"
  25 #include "ErrorList.h"
  26 #include "FuncCode.h"
  27 #include "FuncRequest.h"
  28 #include "InsetIterator.h"
  29 #include "InsetList.h"
  30 #include "Language.h"
  31 #include "LyXFunc.h"
  32 #include "LyXRC.h"
  33 #include "Text.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/InsetCommand.h"
  42 #include "insets/InsetGraphics.h"
  43 #include "insets/InsetGraphicsParams.h"
  44 #include "insets/InsetTabular.h"
  45
  46 #include "mathed/MathData.h"
  47 #include "mathed/InsetMath.h"
  48 #include "mathed/MathSupport.h"
  49
  50 #include "support/debug.h"
  51 #include "support/docstream.h"
  52 #include "support/gettext.h"
  53 #include "support/limited_stack.h"
  54 #include "support/lstrings.h"
  55
  56 #include "frontends/Clipboard.h"
  57 #include "frontends/Selection.h"
  58
  59 #include <boost/tuple/tuple.hpp>
  60 #include <boost/next_prior.hpp>
  61
  62 #include <string>
  63
  64 using namespace std;
  65 using namespace lyx::support;
  66 using lyx::frontend::Clipboard;
  67
  68 namespace lyx {
  69
  70 namespace {
  71
  72 typedef pair<pit_type, int> PitPosPair;
  73
  74 typedef limited_stack<pair<ParagraphList, DocumentClass const *> > CutStack;
  75
  76 CutStack theCuts(10);
  77 // persistent selection, cleared until the next selection
  78 CutStack selectionBuffer(1);
  79
  80 // store whether the tabular stack is newer than the normal copy stack
  81 // FIXME: this is a workaround for bug 1919. Should be removed for 1.5,
  82 // when we (hopefully) have a one-for-all paste mechanism.
  83 bool dirty_tabular_stack_ = false;
  84
  85
  86 bool checkPastePossible(int index)
  87 {
  88         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
  89 }
  90
  91
  92 pair<PitPosPair, pit_type>
  93 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
  94                      DocumentClass const * const oldDocClass, ErrorList & errorlist)
  95 {
  96         Buffer const & buffer = cur.buffer();
  97         pit_type pit = cur.pit();
  98         pos_type pos = cur.pos();
  99         ParagraphList & pars = cur.text()->paragraphs();
 100
 101         if (parlist.empty())
 102                 return make_pair(PitPosPair(pit, pos), pit);
 103
 104         BOOST_ASSERT (pos <= pars[pit].size());
 105
 106         // Make a copy of the CaP paragraphs.
 107         ParagraphList insertion = parlist;
 108         DocumentClass const * const newDocClass =
 109                 buffer.params().documentClassPtr();
 110
 111         // Now remove all out of the pars which is NOT allowed in the
 112         // new environment and set also another font if that is required.
 113
 114         // Convert newline to paragraph break in ERT inset.
 115         // This should not be here!
 116         Inset * inset = pars[pit].inInset();
 117         if (inset && (inset->lyxCode() == ERT_CODE ||
 118                         inset->lyxCode() == LISTINGS_CODE)) {
 119                 for (size_t i = 0; i != insertion.size(); ++i) {
 120                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 121                                 if (insertion[i].isNewline(j)) {
 122                                         // do not track deletion of newline
 123                                         insertion[i].eraseChar(j, false);
 124                                         breakParagraphConservative(
 125                                                         buffer.params(),
 126                                                         insertion, i, j);
 127                                 }
 128                         }
 129                 }
 130         }
 131
 132         // set the paragraphs to empty layout if necessary
 133         if (cur.inset().usePlainLayout()) {
 134                 bool forcePlainLayout = cur.inset().forcePlainLayout();
 135                 Layout const & emptyLayout = newDocClass->emptyLayout();
 136                 Layout const & defaultLayout = newDocClass->defaultLayout();
 137                 ParagraphList::iterator const end = insertion.end();
 138                 ParagraphList::iterator par = insertion.begin();
 139                 for (; par != end; ++par) {
 140                         Layout const & parLayout = par->layout();
 141                         if (forcePlainLayout || parLayout == defaultLayout)
 142                                 par->setLayout(emptyLayout);
 143                 }
 144         } else { // check if we need to reset from empty layout
 145                 Layout const & defaultLayout = newDocClass->defaultLayout();
 146                 Layout const & emptyLayout = newDocClass->emptyLayout();
 147                 ParagraphList::iterator const end = insertion.end();
 148                 ParagraphList::iterator par = insertion.begin();
 149                 for (; par != end; ++par) {
 150                         Layout const & parLayout = par->layout();
 151                         if (parLayout == emptyLayout)
 152                                 par->setLayout(defaultLayout);
 153                 }
 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(oldDocClass, newDocClass, 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                         // do not track deletion of invalid insets
 194                         if (Inset * inset = tmpbuf->getInset(i))
 195                                 if (!pars[pit].insetAllowed(inset->lyxCode()))
 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         InsetIterator const i_end = inset_iterator_end(in);
 215
 216         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 217
 218                 it->setBuffer(const_cast<Buffer &>(buffer));
 219
 220                 switch (it->lyxCode()) {
 221
 222                 case LABEL_CODE: {
 223                         // check for duplicates
 224                         InsetCommand & lab = static_cast<InsetCommand &>(*it);
 225                         docstring const oldname = lab.getParam("name");
 226                         lab.updateCommand(oldname, false);
 227                         docstring const newname = lab.getParam("name");
 228                         if (oldname != newname) {
 229                                 // adapt the references
 230                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 231                                         if (itt->lyxCode() == REF_CODE) {
 232                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 233                                                 if (ref.getParam("reference") == oldname)
 234                                                         ref.setParam("reference", newname);
 235                                         }
 236                                 }
 237                         }
 238                         break;
 239                 }
 240
 241                 case BIBITEM_CODE: {
 242                         // check for duplicates
 243                         InsetCommand & bib = static_cast<InsetCommand &>(*it);
 244                         docstring const oldkey = bib.getParam("key");
 245                         bib.updateCommand(oldkey, false);
 246                         docstring const newkey = bib.getParam("key");
 247                         if (oldkey != newkey) {
 248                                 // adapt the references
 249                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 250                                         if (itt->lyxCode() == CITE_CODE) {
 251                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 252                                                 if (ref.getParam("key") == oldkey)
 253                                                         ref.setParam("key", newkey);
 254                                         }
 255                                 }
 256                         }
 257                         break;
 258                 }
 259
 260                 default:
 261                         break; // nothing
 262                 }
 263         }
 264         insertion.swap(in.paragraphs());
 265
 266         // Split the paragraph for inserting the buf if necessary.
 267         if (!empty)
 268                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 269
 270         // Paste it!
 271         if (empty) {
 272                 pars.insert(boost::next(pars.begin(), pit),
 273                             insertion.begin(),
 274                             insertion.end());
 275
 276                 // merge the empty par with the last par of the insertion
 277                 mergeParagraph(buffer.params(), pars,
 278                                pit + insertion.size() - 1);
 279         } else {
 280                 pars.insert(boost::next(pars.begin(), pit + 1),
 281                             insertion.begin(),
 282                             insertion.end());
 283
 284                 // merge the first par of the insertion with the current par
 285                 mergeParagraph(buffer.params(), pars, pit);
 286         }
 287
 288         pit_type last_paste = pit + insertion.size() - 1;
 289
 290         // Store the new cursor position.
 291         pit = last_paste;
 292         pos = pars[last_paste].size();
 293
 294         // Join (conditionally) last pasted paragraph with next one, i.e.,
 295         // the tail of the spliced document paragraph
 296         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 297                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 298                         mergeParagraph(buffer.params(), pars, last_paste);
 299                 } else if (pars[last_paste + 1].empty()) {
 300                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 301                         mergeParagraph(buffer.params(), pars, last_paste);
 302                 } else if (pars[last_paste].empty()) {
 303                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 304                         mergeParagraph(buffer.params(), pars, last_paste);
 305                 } else {
 306                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 307                         ++last_paste;
 308                 }
 309         }
 310
 311         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 312 }
 313
 314
 315 PitPosPair eraseSelectionHelper(BufferParams const & params,
 316         ParagraphList & pars,
 317         pit_type startpit, pit_type endpit,
 318         int startpos, int endpos)
 319 {
 320         // Start of selection is really invalid.
 321         if (startpit == pit_type(pars.size()) ||
 322             (startpos > pars[startpit].size()))
 323                 return PitPosPair(endpit, endpos);
 324
 325         // Start and end is inside same paragraph
 326         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 327                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 328                 return PitPosPair(endpit, endpos);
 329         }
 330
 331         for (pit_type pit = startpit; pit != endpit + 1;) {
 332                 pos_type const left  = (pit == startpit ? startpos : 0);
 333                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 334                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 335
 336                 // Logically erase only, including the end-of-paragraph character
 337                 pars[pit].eraseChars(left, right, params.trackChanges);
 338
 339                 // Separate handling of paragraph break:
 340                 if (merge && pit != endpit &&
 341                     (pit + 1 != endpit
 342                      || pars[pit].hasSameLayout(pars[endpit])
 343                      || pars[endpit].size() == endpos)) {
 344                         if (pit + 1 == endpit)
 345                                 endpos += pars[pit].size();
 346                         mergeParagraph(params, pars, pit);
 347                         --endpit;
 348                 } else
 349                         ++pit;
 350         }
 351
 352         // Ensure legal cursor pos:
 353         endpit = startpit;
 354         endpos = startpos;
 355         return PitPosPair(endpit, endpos);
 356 }
 357
 358
 359 void putClipboard(ParagraphList const & paragraphs,
 360         DocumentClass const * const docclass, docstring const & plaintext)
 361 {
 362         // For some strange reason gcc 3.2 and 3.3 do not accept
 363         // Buffer buffer(string(), false);
 364         // This needs to be static to avoid a memory leak. When a Buffer is
 365         // constructed, it constructs a BufferParams, which in turn constructs
 366         // a DocumentClass, via new, that is never deleted. If we were to go to
 367         // some kind of garbage collection there, or a shared_ptr, then this
 368         // would not be needed.
 369         static Buffer * buffer = theBufferList().newBuffer(
 370                 FileName::tempName().absFilename() + "_clipboard.internal");
 371         buffer->setUnnamed(true);
 372         buffer->paragraphs() = paragraphs;
 373         buffer->params().setDocumentClass(docclass);
 374         ostringstream lyx;
 375         if (buffer->write(lyx))
 376                 theClipboard().put(lyx.str(), plaintext);
 377         else
 378                 theClipboard().put(string(), plaintext);
 379         // Save that memory
 380         buffer->paragraphs().clear();
 381 }
 382
 383
 384 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 385         pit_type startpit, pit_type endpit,
 386         int start, int end, DocumentClass const * const dc, CutStack & cutstack)
 387 {
 388         LASSERT(0 <= start && start <= pars[startpit].size(), /**/);
 389         LASSERT(0 <= end && end <= pars[endpit].size(), /**/);
 390         LASSERT(startpit != endpit || start <= end, /**/);
 391
 392         // Clone the paragraphs within the selection.
 393         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 394                                 boost::next(pars.begin(), endpit + 1));
 395
 396         // Remove the end of the last paragraph; afterwards, remove the
 397         // beginning of the first paragraph. Keep this order - there may only
 398         // be one paragraph!  Do not track deletions here; this is an internal
 399         // action not visible to the user
 400
 401         Paragraph & back = copy_pars.back();
 402         back.eraseChars(end, back.size(), false);
 403         Paragraph & front = copy_pars.front();
 404         front.eraseChars(0, start, false);
 405
 406         ParagraphList::iterator it = copy_pars.begin();
 407         ParagraphList::iterator it_end = copy_pars.end();
 408
 409         for (; it != it_end; it++) {
 410                 // ERT paragraphs have the Language latex_language.
 411                 // This is invalid outside of ERT, so we need to change it
 412                 // to the buffer language.
 413                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 414                         it->changeLanguage(buf.params(), latex_language, buf.language());
 415                 }
 416                 it->setInsetOwner(0);
 417         }
 418
 419         // do not copy text (also nested in insets) which is marked as deleted
 420         acceptChanges(copy_pars, buf.params());
 421
 422         DocumentClass * d = const_cast<DocumentClass *>(dc);
 423         cutstack.push(make_pair(copy_pars, d));
 424 }
 425
 426 } // namespace anon
 427
 428
 429
 430
 431 namespace cap {
 432
 433 void region(CursorSlice const & i1, CursorSlice const & i2,
 434             Inset::row_type & r1, Inset::row_type & r2,
 435             Inset::col_type & c1, Inset::col_type & c2)
 436 {
 437         Inset & p = i1.inset();
 438         c1 = p.col(i1.idx());
 439         c2 = p.col(i2.idx());
 440         if (c1 > c2)
 441                 swap(c1, c2);
 442         r1 = p.row(i1.idx());
 443         r2 = p.row(i2.idx());
 444         if (r1 > r2)
 445                 swap(r1, r2);
 446 }
 447
 448
 449 docstring grabAndEraseSelection(Cursor & cur)
 450 {
 451         if (!cur.selection())
 452                 return docstring();
 453         docstring res = grabSelection(cur);
 454         eraseSelection(cur);
 455         return res;
 456 }
 457
 458
 459 bool reduceSelectionToOneCell(Cursor & cur)
 460 {
 461         if (!cur.selection() || !cur.inMathed())
 462                 return false;
 463
 464         CursorSlice i1 = cur.selBegin();
 465         CursorSlice i2 = cur.selEnd();
 466         if (!i1.inset().asInsetMath())
 467                 return false;
 468
 469         // the easy case: do nothing if only one cell is selected
 470         if (i1.idx() == i2.idx())
 471                 return true;
 472
 473         cur.top().pos() = 0;
 474         cur.resetAnchor();
 475         cur.top().pos() = cur.top().lastpos();
 476
 477         return true;
 478 }
 479
 480
 481 bool multipleCellsSelected(Cursor const & cur)
 482 {
 483         if (!cur.selection() || !cur.inMathed())
 484                 return false;
 485
 486         CursorSlice i1 = cur.selBegin();
 487         CursorSlice i2 = cur.selEnd();
 488         if (!i1.inset().asInsetMath())
 489                 return false;
 490
 491         if (i1.idx() == i2.idx())
 492                 return false;
 493
 494         return true;
 495 }
 496
 497
 498 void switchBetweenClasses(DocumentClass const * const oldone,
 499                 DocumentClass const * const newone, InsetText & in, ErrorList & errorlist)
 500 {
 501         errorlist.clear();
 502
 503         LASSERT(!in.paragraphs().empty(), /**/);
 504         if (oldone == newone)
 505                 return;
 506
 507         DocumentClass const & oldtc = *oldone;
 508         DocumentClass const & newtc = *newone;
 509
 510         // layouts
 511         ParIterator end = par_iterator_end(in);
 512         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 513                 docstring const name = it->layout().name();
 514
 515                 // the pasted text will keep their own layout name. If this layout does
 516                 // not exist in the new document, it will behave like a standard layout.
 517                 newtc.addLayoutIfNeeded(name);
 518
 519                 if (in.usePlainLayout())
 520                         it->setLayout(newtc.emptyLayout());
 521                 else
 522                         it->setLayout(newtc[name]);
 523         }
 524
 525         // character styles
 526         InsetIterator const i_end = inset_iterator_end(in);
 527         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 528                 InsetCollapsable * inset = it->asInsetCollapsable();
 529                 if (!inset)
 530                         continue;
 531                 if (inset->lyxCode() != FLEX_CODE)
 532                         // FIXME: Should we verify all InsetCollapsable?
 533                         continue;
 534                 inset->setLayout(newone);
 535                 if (!inset->undefined())
 536                         continue;
 537                 // The flex inset is undefined in newtc
 538                 docstring const s = bformat(_(
 539                         "Flex inset %1$s is "
 540                         "undefined because of class "
 541                         "conversion from\n%2$s to %3$s"),
 542                         inset->name(), from_utf8(oldtc.name()),
 543                         from_utf8(newtc.name()));
 544                 // To warn the user that something had to be done.
 545                 errorlist.push_back(ErrorItem(
 546                                 _("Undefined flex inset"),
 547                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 548         }
 549 }
 550
 551
 552 vector<docstring> availableSelections()
 553 {
 554         vector<docstring> selList;
 555
 556         CutStack::const_iterator cit = theCuts.begin();
 557         CutStack::const_iterator end = theCuts.end();
 558         for (; cit != end; ++cit) {
 559                 // we do not use cit-> here because gcc 2.9x does not
 560                 // like it (JMarc)
 561                 ParagraphList const & pars = (*cit).first;
 562                 docstring asciiSel;
 563                 ParagraphList::const_iterator pit = pars.begin();
 564                 ParagraphList::const_iterator pend = pars.end();
 565                 for (; pit != pend; ++pit) {
 566                         asciiSel += pit->asString(AS_STR_INSETS);
 567                         if (asciiSel.size() > 25) {
 568                                 asciiSel.replace(22, docstring::npos,
 569                                                  from_ascii("..."));
 570                                 break;
 571                         }
 572                 }
 573
 574                 selList.push_back(asciiSel);
 575         }
 576
 577         return selList;
 578 }
 579
 580
 581 size_type numberOfSelections()
 582 {
 583         return theCuts.size();
 584 }
 585
 586
 587 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 588 {
 589         // This doesn't make sense, if there is no selection
 590         if (!cur.selection())
 591                 return;
 592
 593         // OK, we have a selection. This is always between cur.selBegin()
 594         // and cur.selEnd()
 595
 596         if (cur.inTexted()) {
 597                 Text * text = cur.text();
 598                 LASSERT(text, /**/);
 599
 600                 saveSelection(cur);
 601
 602                 // make sure that the depth behind the selection are restored, too
 603                 cur.recordUndoSelection();
 604                 pit_type begpit = cur.selBegin().pit();
 605                 pit_type endpit = cur.selEnd().pit();
 606
 607                 int endpos = cur.selEnd().pos();
 608
 609                 BufferParams const & bp = cur.buffer().params();
 610                 if (realcut) {
 611                         copySelectionHelper(cur.buffer(),
 612                                 text->paragraphs(),
 613                                 begpit, endpit,
 614                                 cur.selBegin().pos(), endpos,
 615                                 bp.documentClassPtr(), theCuts);
 616                         // Stuff what we got on the clipboard.
 617                         // Even if there is no selection.
 618                         putClipboard(theCuts[0].first, theCuts[0].second,
 619                                 cur.selectionAsString(true));
 620                 }
 621
 622                 if (begpit != endpit)
 623                         cur.updateFlags(Update::Force | Update::FitCursor);
 624
 625                 boost::tie(endpit, endpos) =
 626                         eraseSelectionHelper(bp,
 627                                 text->paragraphs(),
 628                                 begpit, endpit,
 629                                 cur.selBegin().pos(), endpos);
 630
 631                 // cutSelection can invalidate the cursor so we need to set
 632                 // it anew. (Lgb)
 633                 // we prefer the end for when tracking changes
 634                 cur.pos() = endpos;
 635                 cur.pit() = endpit;
 636
 637                 // sometimes necessary
 638                 if (doclear
 639                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 640                         cur.fixIfBroken();
 641
 642                 // need a valid cursor. (Lgb)
 643                 cur.clearSelection();
 644                 updateLabels(cur.buffer());
 645
 646                 // tell tabular that a recent copy happened
 647                 dirtyTabularStack(false);
 648         }
 649
 650         if (cur.inMathed()) {
 651                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 652                         // The current selection spans more than one cell.
 653                         // Record all cells
 654                         cur.recordUndoInset();
 655                 } else {
 656                         // Record only the current cell to avoid a jumping
 657                         // cursor after undo
 658                         cur.recordUndo();
 659                 }
 660                 if (realcut)
 661                         copySelection(cur);
 662                 eraseSelection(cur);
 663         }
 664 }
 665
 666
 667 void copySelection(Cursor & cur)
 668 {
 669         copySelection(cur, cur.selectionAsString(true));
 670 }
 671
 672
 673 namespace {
 674
 675 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 676 {
 677         // this doesn't make sense, if there is no selection
 678         if (!cur.selection())
 679                 return;
 680
 681         // copySelection can not yet handle the case of cross idx selection
 682         if (cur.selBegin().idx() != cur.selEnd().idx())
 683                 return;
 684
 685         if (cur.inTexted()) {
 686                 Text * text = cur.text();
 687                 LASSERT(text, /**/);
 688                 // ok we have a selection. This is always between cur.selBegin()
 689                 // and sel_end cursor
 690
 691                 // copy behind a space if there is one
 692                 ParagraphList & pars = text->paragraphs();
 693                 pos_type pos = cur.selBegin().pos();
 694                 pit_type par = cur.selBegin().pit();
 695                 while (pos < pars[par].size() &&
 696                        pars[par].isLineSeparator(pos) &&
 697                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 698                         ++pos;
 699
 700                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 701                         pos, cur.selEnd().pos(),
 702                         cur.buffer().params().documentClassPtr(), cutstack);
 703                 dirtyTabularStack(false);
 704         }
 705
 706         if (cur.inMathed()) {
 707                 //lyxerr << "copySelection in mathed" << endl;
 708                 ParagraphList pars;
 709                 Paragraph par;
 710                 BufferParams const & bp = cur.buffer().params();
 711                 // FIXME This should be the empty layout...right?
 712                 par.setLayout(bp.documentClass().emptyLayout());
 713                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 714                 pars.push_back(par);
 715                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 716         }
 717 }
 718
 719 }
 720
 721
 722 void copySelectionToStack()
 723 {
 724         if (!selectionBuffer.empty())
 725                 theCuts.push(selectionBuffer[0]);
 726 }
 727
 728
 729 void copySelection(Cursor & cur, docstring const & plaintext)
 730 {
 731         // In tablemode, because copy and paste actually use special table stack
 732         // we do not attempt to get selected paragraphs under cursor. Instead, a
 733         // paragraph with the plain text version is generated so that table cells
 734         // can be pasted as pure text somewhere else.
 735         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 736                 ParagraphList pars;
 737                 Paragraph par;
 738                 BufferParams const & bp = cur.buffer().params();
 739                 par.setLayout(bp.documentClass().emptyLayout());
 740                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 741                 pars.push_back(par);
 742                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
 743         } else {
 744                 copySelectionToStack(cur, theCuts);
 745         }
 746
 747         // stuff the selection onto the X clipboard, from an explicit copy request
 748         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 749 }
 750
 751
 752 void saveSelection(Cursor & cur)
 753 {
 754         // This function is called, not when a selection is formed, but when
 755         // a selection is cleared. Therefore, multiple keyboard selection
 756         // will not repeatively trigger this function (bug 3877).
 757         if (cur.selection()
 758             && cur.selBegin() == cur.bv().cursor().selBegin()
 759             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 760                 LYXERR(Debug::SELECTION, "saveSelection: '" << cur.selectionAsString(true) << "'");
 761                 copySelectionToStack(cur, selectionBuffer);
 762         }
 763 }
 764
 765
 766 bool selection()
 767 {
 768         return !selectionBuffer.empty();
 769 }
 770
 771
 772 void clearSelection()
 773 {
 774         selectionBuffer.clear();
 775 }
 776
 777
 778 void clearCutStack()
 779 {
 780         theCuts.clear();
 781 }
 782
 783
 784 docstring selection(size_t sel_index)
 785 {
 786         return sel_index < theCuts.size()
 787                 ? theCuts[sel_index].first.back().asString(AS_STR_INSETS)
 788                 : docstring();
 789 }
 790
 791
 792 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 793                         DocumentClass const * const docclass, ErrorList & errorList)
 794 {
 795         if (cur.inTexted()) {
 796                 Text * text = cur.text();
 797                 LASSERT(text, /**/);
 798
 799                 pit_type endpit;
 800                 PitPosPair ppp;
 801
 802                 boost::tie(ppp, endpit) =
 803                         pasteSelectionHelper(cur, parlist, docclass, errorList);
 804                 updateLabels(cur.buffer());
 805                 cur.clearSelection();
 806                 text->setCursor(cur, ppp.first, ppp.second);
 807         }
 808
 809         // mathed is handled in InsetMathNest/InsetMathGrid
 810         LASSERT(!cur.inMathed(), /**/);
 811 }
 812
 813
 814 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 815 {
 816         // this does not make sense, if there is nothing to paste
 817         if (!checkPastePossible(sel_index))
 818                 return;
 819
 820         cur.recordUndo();
 821         pasteParagraphList(cur, theCuts[sel_index].first,
 822                            theCuts[sel_index].second, errorList);
 823         cur.setSelection();
 824 }
 825
 826
 827 void pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 828 {
 829         // Use internal clipboard if it is the most recent one
 830         if (theClipboard().isInternal()) {
 831                 pasteFromStack(cur, errorList, 0);
 832                 return;
 833         }
 834
 835         // First try LyX format
 836         if (theClipboard().hasLyXContents()) {
 837                 string lyx = theClipboard().getAsLyX();
 838                 if (!lyx.empty()) {
 839                         // For some strange reason gcc 3.2 and 3.3 do not accept
 840                         // Buffer buffer(string(), false);
 841                         Buffer buffer("", false);
 842                         buffer.setUnnamed(true);
 843                         if (buffer.readString(lyx)) {
 844                                 cur.recordUndo();
 845                                 pasteParagraphList(cur, buffer.paragraphs(),
 846                                         buffer.params().documentClassPtr(), errorList);
 847                                 cur.setSelection();
 848                                 return;
 849                         }
 850                 }
 851         }
 852
 853         // Then try plain text
 854         docstring const text = theClipboard().getAsText();
 855         if (text.empty())
 856                 return;
 857         cur.recordUndo();
 858         if (asParagraphs)
 859                 cur.text()->insertStringAsParagraphs(cur, text);
 860         else
 861                 cur.text()->insertStringAsLines(cur, text);
 862 }
 863
 864
 865 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
 866                             Clipboard::GraphicsType preferedType)
 867 {
 868         LASSERT(theClipboard().hasGraphicsContents(preferedType), /**/);
 869
 870         // get picture from clipboard
 871         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
 872         if (filename.empty())
 873                 return;
 874
 875         // create inset for graphic
 876         InsetGraphics * inset = new InsetGraphics(cur.buffer());
 877         InsetGraphicsParams params;
 878         params.filename = support::DocFileName(filename.absFilename());
 879         inset->setParams(params);
 880         cur.recordUndo();
 881         cur.insert(inset);
 882 }
 883
 884
 885 void pasteSelection(Cursor & cur, ErrorList & errorList)
 886 {
 887         if (selectionBuffer.empty())
 888                 return;
 889         cur.recordUndo();
 890         pasteParagraphList(cur, selectionBuffer[0].first,
 891                            selectionBuffer[0].second, errorList);
 892 }
 893
 894
 895 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 896 {
 897         cur.recordUndo();
 898         DocIterator selbeg = cur.selectionBegin();
 899
 900         // Get font setting before we cut
 901         Font const font =
 902                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 903
 904         // Insert the new string
 905         pos_type pos = cur.selEnd().pos();
 906         Paragraph & par = cur.selEnd().paragraph();
 907         docstring::const_iterator cit = str.begin();
 908         docstring::const_iterator end = str.end();
 909         for (; cit != end; ++cit, ++pos)
 910                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 911
 912         // Cut the selection
 913         cutSelection(cur, true, false);
 914
 915         // select the replacement
 916         if (backwards) {
 917                 selbeg.pos() += str.length();
 918                 cur.setSelection(selbeg, -int(str.length()));
 919         } else
 920                 cur.setSelection(selbeg, str.length());
 921 }
 922
 923
 924 void replaceSelection(Cursor & cur)
 925 {
 926         if (cur.selection())
 927                 cutSelection(cur, true, false);
 928 }
 929
 930
 931 void eraseSelection(Cursor & cur)
 932 {
 933         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 934         CursorSlice const & i1 = cur.selBegin();
 935         CursorSlice const & i2 = cur.selEnd();
 936         if (i1.inset().asInsetMath()) {
 937                 saveSelection(cur);
 938                 cur.top() = i1;
 939                 if (i1.idx() == i2.idx()) {
 940                         i1.cell().erase(i1.pos(), i2.pos());
 941                         // We may have deleted i1.cell(cur.pos()).
 942                         // Make sure that pos is valid.
 943                         if (cur.pos() > cur.lastpos())
 944                                 cur.pos() = cur.lastpos();
 945                 } else {
 946                         InsetMath * p = i1.asInsetMath();
 947                         Inset::row_type r1, r2;
 948                         Inset::col_type c1, c2;
 949                         region(i1, i2, r1, r2, c1, c2);
 950                         for (Inset::row_type row = r1; row <= r2; ++row)
 951                                 for (Inset::col_type col = c1; col <= c2; ++col)
 952                                         p->cell(p->index(row, col)).clear();
 953                         // We've deleted the whole cell. Only pos 0 is valid.
 954                         cur.pos() = 0;
 955                 }
 956                 // need a valid cursor. (Lgb)
 957                 cur.clearSelection();
 958         } else {
 959                 lyxerr << "can't erase this selection 1" << endl;
 960         }
 961         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 962 }
 963
 964
 965 void selDel(Cursor & cur)
 966 {
 967         //lyxerr << "cap::selDel" << endl;
 968         if (cur.selection())
 969                 eraseSelection(cur);
 970 }
 971
 972
 973 void selClearOrDel(Cursor & cur)
 974 {
 975         //lyxerr << "cap::selClearOrDel" << endl;
 976         if (lyxrc.auto_region_delete)
 977                 selDel(cur);
 978         else
 979                 cur.selection() = false;
 980 }
 981
 982
 983 docstring grabSelection(Cursor const & cur)
 984 {
 985         if (!cur.selection())
 986                 return docstring();
 987
 988 #if 0
 989         // grab selection by glueing multiple cells together. This is not what
 990         // we want because selections spanning multiple cells will get "&" and "\\"
 991         // seperators.
 992         ostringstream os;
 993         for (DocIterator dit = cur.selectionBegin();
 994              dit != cur.selectionEnd(); dit.forwardPos())
 995                 os << asString(dit.cell());
 996         return os.str();
 997 #endif
 998
 999         CursorSlice i1 = cur.selBegin();
1000         CursorSlice i2 = cur.selEnd();
1001
1002         if (i1.idx() == i2.idx()) {
1003                 if (i1.inset().asInsetMath()) {
1004                         MathData::const_iterator it = i1.cell().begin();
1005                         return asString(MathData(it + i1.pos(), it + i2.pos()));
1006                 } else {
1007                         return from_ascii("unknown selection 1");
1008                 }
1009         }
1010
1011         Inset::row_type r1, r2;
1012         Inset::col_type c1, c2;
1013         region(i1, i2, r1, r2, c1, c2);
1014
1015         docstring data;
1016         if (i1.inset().asInsetMath()) {
1017                 for (Inset::row_type row = r1; row <= r2; ++row) {
1018                         if (row > r1)
1019                                 data += "\\\\";
1020                         for (Inset::col_type col = c1; col <= c2; ++col) {
1021                                 if (col > c1)
1022                                         data += '&';
1023                                 data += asString(i1.asInsetMath()->
1024                                         cell(i1.asInsetMath()->index(row, col)));
1025                         }
1026                 }
1027         } else {
1028                 data = from_ascii("unknown selection 2");
1029         }
1030         return data;
1031 }
1032
1033
1034 void dirtyTabularStack(bool b)
1035 {
1036         dirty_tabular_stack_ = b;
1037 }
1038
1039
1040 bool tabularStackDirty()
1041 {
1042         return dirty_tabular_stack_;
1043 }
1044
1045
1046 } // namespace cap
1047
1048 } // namespace lyx