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 "FuncCode.h"
  26 #include "FuncRequest.h"
  27 #include "InsetIterator.h"
  28 #include "InsetList.h"
  29 #include "Language.h"
  30 #include "LyXFunc.h"
  31 #include "LyXRC.h"
  32 #include "Text.h"
  33 #include "Paragraph.h"
  34 #include "paragraph_funcs.h"
  35 #include "ParagraphParameters.h"
  36 #include "ParIterator.h"
  37 #include "Undo.h"
  38
  39 #include "insets/InsetFlex.h"
  40 #include "insets/InsetCommand.h"
  41 #include "insets/InsetGraphics.h"
  42 #include "insets/InsetGraphicsParams.h"
  43 #include "insets/InsetTabular.h"
  44
  45 #include "mathed/MathData.h"
  46 #include "mathed/InsetMath.h"
  47 #include "mathed/MathSupport.h"
  48
  49 #include "support/debug.h"
  50 #include "support/docstream.h"
  51 #include "support/gettext.h"
  52 #include "support/limited_stack.h"
  53 #include "support/lstrings.h"
  54
  55 #include "frontends/Clipboard.h"
  56 #include "frontends/Selection.h"
  57
  58 #include <boost/tuple/tuple.hpp>
  59 #include <boost/next_prior.hpp>
  60
  61 #include <string>
  62
  63 using namespace std;
  64 using namespace lyx::support;
  65 using lyx::frontend::Clipboard;
  66
  67 namespace lyx {
  68
  69 namespace {
  70
  71 typedef pair<pit_type, int> PitPosPair;
  72
  73 typedef limited_stack<pair<ParagraphList, DocumentClass const *> > 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 bool checkPastePossible(int index)
  86 {
  87         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
  88 }
  89
  90
  91 pair<PitPosPair, pit_type>
  92 pasteSelectionHelper(Cursor & cur, ParagraphList const & parlist,
  93                      DocumentClass const * const oldDocClass, ErrorList & errorlist)
  94 {
  95         Buffer const & buffer = cur.buffer();
  96         pit_type pit = cur.pit();
  97         pos_type pos = cur.pos();
  98         ParagraphList & pars = cur.text()->paragraphs();
  99
 100         if (parlist.empty())
 101                 return make_pair(PitPosPair(pit, pos), pit);
 102
 103         BOOST_ASSERT (pos <= pars[pit].size());
 104
 105         // Make a copy of the CaP paragraphs.
 106         ParagraphList insertion = parlist;
 107         DocumentClass const * const newDocClass =
 108                 buffer.params().documentClassPtr();
 109
 110         // Now remove all out of the pars which is NOT allowed in the
 111         // new environment and set also another font if that is required.
 112
 113         // Convert newline to paragraph break in ERT inset.
 114         // This should not be here!
 115         Inset * inset = pars[pit].inInset();
 116         if (inset && (inset->lyxCode() == ERT_CODE ||
 117                         inset->lyxCode() == LISTINGS_CODE)) {
 118                 for (size_t i = 0; i != insertion.size(); ++i) {
 119                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 120                                 if (insertion[i].isNewline(j)) {
 121                                         // do not track deletion of newline
 122                                         insertion[i].eraseChar(j, false);
 123                                         breakParagraphConservative(
 124                                                         buffer.params(),
 125                                                         insertion, i, j);
 126                                 }
 127                         }
 128                 }
 129         }
 130
 131         // set the paragraphs to empty layout if necessary
 132         if (cur.inset().usePlainLayout()) {
 133                 bool forcePlainLayout = cur.inset().forcePlainLayout();
 134                 Layout const & emptyLayout = newDocClass->emptyLayout();
 135                 Layout const & defaultLayout = newDocClass->defaultLayout();
 136                 ParagraphList::iterator const end = insertion.end();
 137                 ParagraphList::iterator par = insertion.begin();
 138                 for (; par != end; ++par) {
 139                         Layout const & parLayout = par->layout();
 140                         if (forcePlainLayout || parLayout == defaultLayout)
 141                                 par->setLayout(emptyLayout);
 142                 }
 143         } else { // check if we need to reset from empty layout
 144                 Layout const & defaultLayout = newDocClass->defaultLayout();
 145                 Layout const & emptyLayout = newDocClass->emptyLayout();
 146                 ParagraphList::iterator const end = insertion.end();
 147                 ParagraphList::iterator par = insertion.begin();
 148                 for (; par != end; ++par) {
 149                         Layout const & parLayout = par->layout();
 150                         if (parLayout == emptyLayout)
 151                                 par->setLayout(defaultLayout);
 152                 }
 153         }
 154
 155         // Make sure there is no class difference.
 156         InsetText in;
 157         // This works without copying any paragraph data because we have
 158         // a specialized swap method for ParagraphList. This is important
 159         // since we store pointers to insets at some places and we don't
 160         // want to invalidate them.
 161         insertion.swap(in.paragraphs());
 162         cap::switchBetweenClasses(oldDocClass, newDocClass, in, errorlist);
 163         insertion.swap(in.paragraphs());
 164
 165         ParagraphList::iterator tmpbuf = insertion.begin();
 166         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 167
 168         depth_type max_depth = pars[pit].getMaxDepthAfter();
 169
 170         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 171                 // If we have a negative jump so that the depth would
 172                 // go below 0 depth then we have to redo the delta to
 173                 // this new max depth level so that subsequent
 174                 // paragraphs are aligned correctly to this paragraph
 175                 // at level 0.
 176                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 177                         depth_delta = 0;
 178
 179                 // Set the right depth so that we are not too deep or shallow.
 180                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 181                 if (tmpbuf->params().depth() > max_depth)
 182                         tmpbuf->params().depth(max_depth);
 183
 184                 // Only set this from the 2nd on as the 2nd depends
 185                 // for maxDepth still on pit.
 186                 if (tmpbuf != insertion.begin())
 187                         max_depth = tmpbuf->getMaxDepthAfter();
 188
 189                 // Set the inset owner of this paragraph.
 190                 tmpbuf->setInsetOwner(pars[pit].inInset());
 191                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 192                         // do not track deletion of invalid insets
 193                         if (Inset * inset = tmpbuf->getInset(i))
 194                                 if (!pars[pit].insetAllowed(inset->lyxCode()))
 195                                         tmpbuf->eraseChar(i--, false);
 196                 }
 197
 198                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 199                                          Change::INSERTED : Change::UNCHANGED));
 200         }
 201
 202         bool const empty = pars[pit].empty();
 203         if (!empty) {
 204                 // Make the buf exactly the same layout as the cursor
 205                 // paragraph.
 206                 insertion.begin()->makeSameLayout(pars[pit]);
 207         }
 208
 209         // Prepare the paragraphs and insets for insertion.
 210         // A couple of insets store buffer references so need updating.
 211         insertion.swap(in.paragraphs());
 212
 213         InsetIterator const i_end = inset_iterator_end(in);
 214
 215         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 216
 217                 it->setBuffer(const_cast<Buffer &>(buffer));
 218
 219                 switch (it->lyxCode()) {
 220
 221                 case LABEL_CODE: {
 222                         // check for duplicates
 223                         InsetCommand & lab = static_cast<InsetCommand &>(*it);
 224                         docstring const oldname = lab.getParam("name");
 225                         lab.updateCommand(oldname, false);
 226                         docstring const newname = lab.getParam("name");
 227                         if (oldname != newname) {
 228                                 // adapt the references
 229                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 230                                         if (itt->lyxCode() == REF_CODE) {
 231                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 232                                                 if (ref.getParam("reference") == oldname)
 233                                                         ref.setParam("reference", newname);
 234                                         }
 235                                 }
 236                         }
 237                         break;
 238                 }
 239
 240                 case BIBITEM_CODE: {
 241                         // check for duplicates
 242                         InsetCommand & bib = static_cast<InsetCommand &>(*it);
 243                         docstring const oldkey = bib.getParam("key");
 244                         bib.updateCommand(oldkey, false);
 245                         docstring const newkey = bib.getParam("key");
 246                         if (oldkey != newkey) {
 247                                 // adapt the references
 248                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 249                                         if (itt->lyxCode() == CITE_CODE) {
 250                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 251                                                 if (ref.getParam("key") == oldkey)
 252                                                         ref.setParam("key", newkey);
 253                                         }
 254                                 }
 255                         }
 256                         break;
 257                 }
 258
 259                 default:
 260                         break; // nothing
 261                 }
 262         }
 263         insertion.swap(in.paragraphs());
 264
 265         // Split the paragraph for inserting the buf if necessary.
 266         if (!empty)
 267                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 268
 269         // Paste it!
 270         if (empty) {
 271                 pars.insert(boost::next(pars.begin(), pit),
 272                             insertion.begin(),
 273                             insertion.end());
 274
 275                 // merge the empty par with the last par of the insertion
 276                 mergeParagraph(buffer.params(), pars,
 277                                pit + insertion.size() - 1);
 278         } else {
 279                 pars.insert(boost::next(pars.begin(), pit + 1),
 280                             insertion.begin(),
 281                             insertion.end());
 282
 283                 // merge the first par of the insertion with the current par
 284                 mergeParagraph(buffer.params(), pars, pit);
 285         }
 286
 287         pit_type last_paste = pit + insertion.size() - 1;
 288
 289         // Store the new cursor position.
 290         pit = last_paste;
 291         pos = pars[last_paste].size();
 292
 293         // Join (conditionally) last pasted paragraph with next one, i.e.,
 294         // the tail of the spliced document paragraph
 295         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 296                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 297                         mergeParagraph(buffer.params(), pars, last_paste);
 298                 } else if (pars[last_paste + 1].empty()) {
 299                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 300                         mergeParagraph(buffer.params(), pars, last_paste);
 301                 } else if (pars[last_paste].empty()) {
 302                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 303                         mergeParagraph(buffer.params(), pars, last_paste);
 304                 } else {
 305                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 306                         ++last_paste;
 307                 }
 308         }
 309
 310         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 311 }
 312
 313
 314 PitPosPair eraseSelectionHelper(BufferParams const & params,
 315         ParagraphList & pars,
 316         pit_type startpit, pit_type endpit,
 317         int startpos, int endpos)
 318 {
 319         // Start of selection is really invalid.
 320         if (startpit == pit_type(pars.size()) ||
 321             (startpos > pars[startpit].size()))
 322                 return PitPosPair(endpit, endpos);
 323
 324         // Start and end is inside same paragraph
 325         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 326                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 327                 return PitPosPair(endpit, endpos);
 328         }
 329
 330         for (pit_type pit = startpit; pit != endpit + 1;) {
 331                 pos_type const left  = (pit == startpit ? startpos : 0);
 332                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 333                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 334
 335                 // Logically erase only, including the end-of-paragraph character
 336                 pars[pit].eraseChars(left, right, params.trackChanges);
 337
 338                 // Separate handling of paragraph break:
 339                 if (merge && pit != endpit &&
 340                     (pit + 1 != endpit
 341                      || pars[pit].hasSameLayout(pars[endpit])
 342                      || pars[endpit].size() == endpos)) {
 343                         if (pit + 1 == endpit)
 344                                 endpos += pars[pit].size();
 345                         mergeParagraph(params, pars, pit);
 346                         --endpit;
 347                 } else
 348                         ++pit;
 349         }
 350
 351         // Ensure legal cursor pos:
 352         endpit = startpit;
 353         endpos = startpos;
 354         return PitPosPair(endpit, endpos);
 355 }
 356
 357
 358 void putClipboard(ParagraphList const & paragraphs,
 359         DocumentClass const * const docclass, docstring const & plaintext)
 360 {
 361         // For some strange reason gcc 3.2 and 3.3 do not accept
 362         // Buffer buffer(string(), false);
 363         // This needs to be static to avoid a memory leak. When a Buffer is
 364         // constructed, it constructs a BufferParams, which in turn constructs
 365         // a DocumentClass, via new, that is never deleted. If we were to go to
 366         // some kind of garbage collection there, or a shared_ptr, then this
 367         // would not be needed.
 368         // FIXME: this cannot be static because it gets destructed after the main
 369         // LyX singleton is destroyed and the code is just not ready for that yet!
 370         //static Buffer buffer("", false);
 371         Buffer buffer("", false);
 372         buffer.setUnnamed(true);
 373         buffer.paragraphs() = paragraphs;
 374         buffer.params().setDocumentClass(docclass);
 375         ostringstream lyx;
 376         if (buffer.write(lyx))
 377                 theClipboard().put(lyx.str(), plaintext);
 378         else
 379                 theClipboard().put(string(), plaintext);
 380         // Save that memory
 381         buffer.paragraphs().clear();
 382 }
 383
 384
 385 void copySelectionHelper(Buffer const & buf, ParagraphList & pars,
 386         pit_type startpit, pit_type endpit,
 387         int start, int end, DocumentClass const * const dc, CutStack & cutstack)
 388 {
 389         LASSERT(0 <= start && start <= pars[startpit].size(), /**/);
 390         LASSERT(0 <= end && end <= pars[endpit].size(), /**/);
 391         LASSERT(startpit != endpit || start <= end, /**/);
 392
 393         // Clone the paragraphs within the selection.
 394         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 395                                 boost::next(pars.begin(), endpit + 1));
 396
 397         // Remove the end of the last paragraph; afterwards, remove the
 398         // beginning of the first paragraph. Keep this order - there may only
 399         // be one paragraph!  Do not track deletions here; this is an internal
 400         // action not visible to the user
 401
 402         Paragraph & back = copy_pars.back();
 403         back.eraseChars(end, back.size(), false);
 404         Paragraph & front = copy_pars.front();
 405         front.eraseChars(0, start, false);
 406
 407         ParagraphList::iterator it = copy_pars.begin();
 408         ParagraphList::iterator it_end = copy_pars.end();
 409
 410         for (; it != it_end; it++) {
 411                 // ERT paragraphs have the Language latex_language.
 412                 // This is invalid outside of ERT, so we need to change it
 413                 // to the buffer language.
 414                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 415                         it->changeLanguage(buf.params(), latex_language, buf.language());
 416                 }
 417                 it->setInsetOwner(0);
 418         }
 419
 420         // do not copy text (also nested in insets) which is marked as deleted
 421         acceptChanges(copy_pars, buf.params());
 422
 423         DocumentClass * d = const_cast<DocumentClass *>(dc);
 424         cutstack.push(make_pair(copy_pars, d));
 425 }
 426
 427 } // namespace anon
 428
 429
 430
 431
 432 namespace cap {
 433
 434 void region(CursorSlice const & i1, CursorSlice const & i2,
 435             Inset::row_type & r1, Inset::row_type & r2,
 436             Inset::col_type & c1, Inset::col_type & c2)
 437 {
 438         Inset & p = i1.inset();
 439         c1 = p.col(i1.idx());
 440         c2 = p.col(i2.idx());
 441         if (c1 > c2)
 442                 swap(c1, c2);
 443         r1 = p.row(i1.idx());
 444         r2 = p.row(i2.idx());
 445         if (r1 > r2)
 446                 swap(r1, r2);
 447 }
 448
 449
 450 docstring grabAndEraseSelection(Cursor & cur)
 451 {
 452         if (!cur.selection())
 453                 return docstring();
 454         docstring res = grabSelection(cur);
 455         eraseSelection(cur);
 456         return res;
 457 }
 458
 459
 460 bool reduceSelectionToOneCell(Cursor & cur)
 461 {
 462         if (!cur.selection() || !cur.inMathed())
 463                 return false;
 464
 465         CursorSlice i1 = cur.selBegin();
 466         CursorSlice i2 = cur.selEnd();
 467         if (!i1.inset().asInsetMath())
 468                 return false;
 469
 470         // the easy case: do nothing if only one cell is selected
 471         if (i1.idx() == i2.idx())
 472                 return true;
 473
 474         cur.top().pos() = 0;
 475         cur.resetAnchor();
 476         cur.top().pos() = cur.top().lastpos();
 477
 478         return true;
 479 }
 480
 481
 482 bool multipleCellsSelected(Cursor const & cur)
 483 {
 484         if (!cur.selection() || !cur.inMathed())
 485                 return false;
 486
 487         CursorSlice i1 = cur.selBegin();
 488         CursorSlice i2 = cur.selEnd();
 489         if (!i1.inset().asInsetMath())
 490                 return false;
 491
 492         if (i1.idx() == i2.idx())
 493                 return false;
 494
 495         return true;
 496 }
 497
 498
 499 void switchBetweenClasses(DocumentClass const * const oldone,
 500                 DocumentClass const * const newone, InsetText & in, ErrorList & errorlist)
 501 {
 502         errorlist.clear();
 503
 504         LASSERT(!in.paragraphs().empty(), /**/);
 505         if (oldone == newone)
 506                 return;
 507
 508         DocumentClass const & oldtc = *oldone;
 509         DocumentClass const & newtc = *newone;
 510
 511         // layouts
 512         ParIterator end = par_iterator_end(in);
 513         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 514                 docstring const name = it->layout().name();
 515
 516                 // the pasted text will keep their own layout name. If this layout does
 517                 // not exist in the new document, it will behave like a standard layout.
 518                 newtc.addLayoutIfNeeded(name);
 519
 520                 if (in.usePlainLayout())
 521                         it->setLayout(newtc.emptyLayout());
 522                 else
 523                         it->setLayout(newtc[name]);
 524         }
 525
 526         // character styles
 527         InsetIterator const i_end = inset_iterator_end(in);
 528         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 529                 InsetCollapsable * inset = it->asInsetCollapsable();
 530                 if (!inset)
 531                         continue;
 532                 if (inset->lyxCode() != FLEX_CODE)
 533                         // FIXME: Should we verify all InsetCollapsable?
 534                         continue;
 535                 inset->setLayout(newone);
 536                 if (!inset->undefined())
 537                         continue;
 538                 // The flex inset is undefined in newtc
 539                 docstring const s = bformat(_(
 540                         "Flex inset %1$s is "
 541                         "undefined because of class "
 542                         "conversion from\n%2$s to %3$s"),
 543                         inset->name(), from_utf8(oldtc.name()),
 544                         from_utf8(newtc.name()));
 545                 // To warn the user that something had to be done.
 546                 errorlist.push_back(ErrorItem(
 547                                 _("Undefined flex inset"),
 548                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 549         }
 550 }
 551
 552
 553 vector<docstring> availableSelections()
 554 {
 555         vector<docstring> selList;
 556
 557         CutStack::const_iterator cit = theCuts.begin();
 558         CutStack::const_iterator end = theCuts.end();
 559         for (; cit != end; ++cit) {
 560                 // we do not use cit-> here because gcc 2.9x does not
 561                 // like it (JMarc)
 562                 ParagraphList const & pars = (*cit).first;
 563                 docstring asciiSel;
 564                 ParagraphList::const_iterator pit = pars.begin();
 565                 ParagraphList::const_iterator pend = pars.end();
 566                 for (; pit != pend; ++pit) {
 567                         asciiSel += pit->asString(AS_STR_INSETS);
 568                         if (asciiSel.size() > 25) {
 569                                 asciiSel.replace(22, docstring::npos,
 570                                                  from_ascii("..."));
 571                                 break;
 572                         }
 573                 }
 574
 575                 selList.push_back(asciiSel);
 576         }
 577
 578         return selList;
 579 }
 580
 581
 582 size_type numberOfSelections()
 583 {
 584         return theCuts.size();
 585 }
 586
 587
 588 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 589 {
 590         // This doesn't make sense, if there is no selection
 591         if (!cur.selection())
 592                 return;
 593
 594         // OK, we have a selection. This is always between cur.selBegin()
 595         // and cur.selEnd()
 596
 597         if (cur.inTexted()) {
 598                 Text * text = cur.text();
 599                 LASSERT(text, /**/);
 600
 601                 saveSelection(cur);
 602
 603                 // make sure that the depth behind the selection are restored, too
 604                 cur.recordUndoSelection();
 605                 pit_type begpit = cur.selBegin().pit();
 606                 pit_type endpit = cur.selEnd().pit();
 607
 608                 int endpos = cur.selEnd().pos();
 609
 610                 BufferParams const & bp = cur.buffer().params();
 611                 if (realcut) {
 612                         copySelectionHelper(cur.buffer(),
 613                                 text->paragraphs(),
 614                                 begpit, endpit,
 615                                 cur.selBegin().pos(), endpos,
 616                                 bp.documentClassPtr(), theCuts);
 617                         // Stuff what we got on the clipboard.
 618                         // Even if there is no selection.
 619                         putClipboard(theCuts[0].first, theCuts[0].second,
 620                                 cur.selectionAsString(true));
 621                 }
 622
 623                 if (begpit != endpit)
 624                         cur.updateFlags(Update::Force | Update::FitCursor);
 625
 626                 boost::tie(endpit, endpos) =
 627                         eraseSelectionHelper(bp,
 628                                 text->paragraphs(),
 629                                 begpit, endpit,
 630                                 cur.selBegin().pos(), endpos);
 631
 632                 // cutSelection can invalidate the cursor so we need to set
 633                 // it anew. (Lgb)
 634                 // we prefer the end for when tracking changes
 635                 cur.pos() = endpos;
 636                 cur.pit() = endpit;
 637
 638                 // sometimes necessary
 639                 if (doclear
 640                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 641                         cur.fixIfBroken();
 642
 643                 // need a valid cursor. (Lgb)
 644                 cur.clearSelection();
 645                 updateLabels(cur.buffer());
 646
 647                 // tell tabular that a recent copy happened
 648                 dirtyTabularStack(false);
 649         }
 650
 651         if (cur.inMathed()) {
 652                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 653                         // The current selection spans more than one cell.
 654                         // Record all cells
 655                         cur.recordUndoInset();
 656                 } else {
 657                         // Record only the current cell to avoid a jumping
 658                         // cursor after undo
 659                         cur.recordUndo();
 660                 }
 661                 if (realcut)
 662                         copySelection(cur);
 663                 eraseSelection(cur);
 664         }
 665 }
 666
 667
 668 void copySelection(Cursor & cur)
 669 {
 670         copySelection(cur, cur.selectionAsString(true));
 671 }
 672
 673
 674 namespace {
 675
 676 void copySelectionToStack(Cursor & cur, CutStack & cutstack)
 677 {
 678         // this doesn't make sense, if there is no selection
 679         if (!cur.selection())
 680                 return;
 681
 682         // copySelection can not yet handle the case of cross idx selection
 683         if (cur.selBegin().idx() != cur.selEnd().idx())
 684                 return;
 685
 686         if (cur.inTexted()) {
 687                 Text * text = cur.text();
 688                 LASSERT(text, /**/);
 689                 // ok we have a selection. This is always between cur.selBegin()
 690                 // and sel_end cursor
 691
 692                 // copy behind a space if there is one
 693                 ParagraphList & pars = text->paragraphs();
 694                 pos_type pos = cur.selBegin().pos();
 695                 pit_type par = cur.selBegin().pit();
 696                 while (pos < pars[par].size() &&
 697                        pars[par].isLineSeparator(pos) &&
 698                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 699                         ++pos;
 700
 701                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 702                         pos, cur.selEnd().pos(),
 703                         cur.buffer().params().documentClassPtr(), cutstack);
 704                 dirtyTabularStack(false);
 705         }
 706
 707         if (cur.inMathed()) {
 708                 //lyxerr << "copySelection in mathed" << endl;
 709                 ParagraphList pars;
 710                 Paragraph par;
 711                 BufferParams const & bp = cur.buffer().params();
 712                 // FIXME This should be the empty layout...right?
 713                 par.setLayout(bp.documentClass().emptyLayout());
 714                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 715                 pars.push_back(par);
 716                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 717         }
 718 }
 719
 720 }
 721
 722
 723 void copySelectionToStack()
 724 {
 725         if (!selectionBuffer.empty())
 726                 theCuts.push(selectionBuffer[0]);
 727 }
 728
 729
 730 void copySelection(Cursor & cur, docstring const & plaintext)
 731 {
 732         // In tablemode, because copy and paste actually use special table stack
 733         // we do not attempt to get selected paragraphs under cursor. Instead, a
 734         // paragraph with the plain text version is generated so that table cells
 735         // can be pasted as pure text somewhere else.
 736         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 737                 ParagraphList pars;
 738                 Paragraph par;
 739                 BufferParams const & bp = cur.buffer().params();
 740                 par.setLayout(bp.documentClass().emptyLayout());
 741                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 742                 pars.push_back(par);
 743                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
 744         } else {
 745                 copySelectionToStack(cur, theCuts);
 746         }
 747
 748         // stuff the selection onto the X clipboard, from an explicit copy request
 749         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 750 }
 751
 752
 753 void saveSelection(Cursor & cur)
 754 {
 755         // This function is called, not when a selection is formed, but when
 756         // a selection is cleared. Therefore, multiple keyboard selection
 757         // will not repeatively trigger this function (bug 3877).
 758         if (cur.selection()
 759             && cur.selBegin() == cur.bv().cursor().selBegin()
 760             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 761                 LYXERR(Debug::ACTION, "'" << cur.selectionAsString(true) << "'");
 762                 copySelectionToStack(cur, selectionBuffer);
 763         }
 764 }
 765
 766
 767 bool selection()
 768 {
 769         return !selectionBuffer.empty();
 770 }
 771
 772
 773 void clearSelection()
 774 {
 775         selectionBuffer.clear();
 776 }
 777
 778
 779 void clearCutStack()
 780 {
 781         theCuts.clear();
 782 }
 783
 784
 785 docstring selection(size_t sel_index)
 786 {
 787         return sel_index < theCuts.size()
 788                 ? theCuts[sel_index].first.back().asString(AS_STR_INSETS)
 789                 : docstring();
 790 }
 791
 792
 793 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 794                         DocumentClass const * const docclass, ErrorList & errorList)
 795 {
 796         if (cur.inTexted()) {
 797                 Text * text = cur.text();
 798                 LASSERT(text, /**/);
 799
 800                 pit_type endpit;
 801                 PitPosPair ppp;
 802
 803                 boost::tie(ppp, endpit) =
 804                         pasteSelectionHelper(cur, parlist, docclass, errorList);
 805                 updateLabels(cur.buffer());
 806                 cur.clearSelection();
 807                 text->setCursor(cur, ppp.first, ppp.second);
 808         }
 809
 810         // mathed is handled in InsetMathNest/InsetMathGrid
 811         LASSERT(!cur.inMathed(), /**/);
 812 }
 813
 814
 815 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 816 {
 817         // this does not make sense, if there is nothing to paste
 818         if (!checkPastePossible(sel_index))
 819                 return;
 820
 821         cur.recordUndo();
 822         pasteParagraphList(cur, theCuts[sel_index].first,
 823                            theCuts[sel_index].second, errorList);
 824         cur.setSelection();
 825 }
 826
 827
 828 void pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 829 {
 830         // Use internal clipboard if it is the most recent one
 831         if (theClipboard().isInternal()) {
 832                 pasteFromStack(cur, errorList, 0);
 833                 return;
 834         }
 835
 836         // First try LyX format
 837         if (theClipboard().hasLyXContents()) {
 838                 string lyx = theClipboard().getAsLyX();
 839                 if (!lyx.empty()) {
 840                         // For some strange reason gcc 3.2 and 3.3 do not accept
 841                         // Buffer buffer(string(), false);
 842                         Buffer buffer("", false);
 843                         buffer.setUnnamed(true);
 844                         if (buffer.readString(lyx)) {
 845                                 cur.recordUndo();
 846                                 pasteParagraphList(cur, buffer.paragraphs(),
 847                                         buffer.params().documentClassPtr(), errorList);
 848                                 cur.setSelection();
 849                                 return;
 850                         }
 851                 }
 852         }
 853
 854         // Then try plain text
 855         docstring const text = theClipboard().getAsText();
 856         if (text.empty())
 857                 return;
 858         cur.recordUndo();
 859         if (asParagraphs)
 860                 cur.text()->insertStringAsParagraphs(cur, text);
 861         else
 862                 cur.text()->insertStringAsLines(cur, text);
 863 }
 864
 865
 866 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
 867                             Clipboard::GraphicsType preferedType)
 868 {
 869         LASSERT(theClipboard().hasGraphicsContents(preferedType), /**/);
 870
 871         // get picture from clipboard
 872         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
 873         if (filename.empty())
 874                 return;
 875
 876         // create inset for graphic
 877         InsetGraphics * inset = new InsetGraphics(cur.buffer());
 878         InsetGraphicsParams params;
 879         params.filename = support::DocFileName(filename.absFilename());
 880         inset->setParams(params);
 881         cur.recordUndo();
 882         cur.insert(inset);
 883 }
 884
 885
 886 void pasteSelection(Cursor & cur, ErrorList & errorList)
 887 {
 888         if (selectionBuffer.empty())
 889                 return;
 890         cur.recordUndo();
 891         pasteParagraphList(cur, selectionBuffer[0].first,
 892                            selectionBuffer[0].second, errorList);
 893 }
 894
 895
 896 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 897 {
 898         cur.recordUndo();
 899         DocIterator selbeg = cur.selectionBegin();
 900
 901         // Get font setting before we cut
 902         Font const font =
 903                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 904
 905         // Insert the new string
 906         pos_type pos = cur.selEnd().pos();
 907         Paragraph & par = cur.selEnd().paragraph();
 908         docstring::const_iterator cit = str.begin();
 909         docstring::const_iterator end = str.end();
 910         for (; cit != end; ++cit, ++pos)
 911                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 912
 913         // Cut the selection
 914         cutSelection(cur, true, false);
 915
 916         // select the replacement
 917         if (backwards) {
 918                 selbeg.pos() += str.length();
 919                 cur.setSelection(selbeg, -int(str.length()));
 920         } else
 921                 cur.setSelection(selbeg, str.length());
 922 }
 923
 924
 925 void replaceSelection(Cursor & cur)
 926 {
 927         if (cur.selection())
 928                 cutSelection(cur, true, false);
 929 }
 930
 931
 932 void eraseSelection(Cursor & cur)
 933 {
 934         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 935         CursorSlice const & i1 = cur.selBegin();
 936         CursorSlice const & i2 = cur.selEnd();
 937         if (i1.inset().asInsetMath()) {
 938                 saveSelection(cur);
 939                 cur.top() = i1;
 940                 if (i1.idx() == i2.idx()) {
 941                         i1.cell().erase(i1.pos(), i2.pos());
 942                         // We may have deleted i1.cell(cur.pos()).
 943                         // Make sure that pos is valid.
 944                         if (cur.pos() > cur.lastpos())
 945                                 cur.pos() = cur.lastpos();
 946                 } else {
 947                         InsetMath * p = i1.asInsetMath();
 948                         Inset::row_type r1, r2;
 949                         Inset::col_type c1, c2;
 950                         region(i1, i2, r1, r2, c1, c2);
 951                         for (Inset::row_type row = r1; row <= r2; ++row)
 952                                 for (Inset::col_type col = c1; col <= c2; ++col)
 953                                         p->cell(p->index(row, col)).clear();
 954                         // We've deleted the whole cell. Only pos 0 is valid.
 955                         cur.pos() = 0;
 956                 }
 957                 // need a valid cursor. (Lgb)
 958                 cur.clearSelection();
 959         } else {
 960                 lyxerr << "can't erase this selection 1" << endl;
 961         }
 962         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 963 }
 964
 965
 966 void selDel(Cursor & cur)
 967 {
 968         //lyxerr << "cap::selDel" << endl;
 969         if (cur.selection())
 970                 eraseSelection(cur);
 971 }
 972
 973
 974 void selClearOrDel(Cursor & cur)
 975 {
 976         //lyxerr << "cap::selClearOrDel" << endl;
 977         if (lyxrc.auto_region_delete)
 978                 selDel(cur);
 979         else
 980                 cur.selection() = false;
 981 }
 982
 983
 984 docstring grabSelection(Cursor const & cur)
 985 {
 986         if (!cur.selection())
 987                 return docstring();
 988
 989 #if 0
 990         // grab selection by glueing multiple cells together. This is not what
 991         // we want because selections spanning multiple cells will get "&" and "\\"
 992         // seperators.
 993         ostringstream os;
 994         for (DocIterator dit = cur.selectionBegin();
 995              dit != cur.selectionEnd(); dit.forwardPos())
 996                 os << asString(dit.cell());
 997         return os.str();
 998 #endif
 999
1000         CursorSlice i1 = cur.selBegin();
1001         CursorSlice i2 = cur.selEnd();
1002
1003         if (i1.idx() == i2.idx()) {
1004                 if (i1.inset().asInsetMath()) {
1005                         MathData::const_iterator it = i1.cell().begin();
1006                         return asString(MathData(it + i1.pos(), it + i2.pos()));
1007                 } else {
1008                         return from_ascii("unknown selection 1");
1009                 }
1010         }
1011
1012         Inset::row_type r1, r2;
1013         Inset::col_type c1, c2;
1014         region(i1, i2, r1, r2, c1, c2);
1015
1016         docstring data;
1017         if (i1.inset().asInsetMath()) {
1018                 for (Inset::row_type row = r1; row <= r2; ++row) {
1019                         if (row > r1)
1020                                 data += "\\\\";
1021                         for (Inset::col_type col = c1; col <= c2; ++col) {
1022                                 if (col > c1)
1023                                         data += '&';
1024                                 data += asString(i1.asInsetMath()->
1025                                         cell(i1.asInsetMath()->index(row, col)));
1026                         }
1027                 }
1028         } else {
1029                 data = from_ascii("unknown selection 2");
1030         }
1031         return data;
1032 }
1033
1034
1035 void dirtyTabularStack(bool b)
1036 {
1037         dirty_tabular_stack_ = b;
1038 }
1039
1040
1041 bool tabularStackDirty()
1042 {
1043         return dirty_tabular_stack_;
1044 }
1045
1046
1047 } // namespace cap
1048
1049 } // namespace lyx