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         InsetText * target_inset = cur.inset().asInsetText();
 100         if (!target_inset) {
 101                 InsetTabular * it = cur.inset().asInsetTabular();
 102                 target_inset = it? it->cell(cur.idx())->asInsetText() : 0;
 103         }
 104         LASSERT(target_inset, return make_pair(PitPosPair(pit, pos), pit));
 105         ParagraphList & pars = target_inset->paragraphs();
 106
 107         if (parlist.empty())
 108                 return make_pair(PitPosPair(pit, pos), pit);
 109
 110         BOOST_ASSERT (pos <= pars[pit].size());
 111
 112         // Make a copy of the CaP paragraphs.
 113         ParagraphList insertion = parlist;
 114         DocumentClass const * const newDocClass =
 115                 buffer.params().documentClassPtr();
 116
 117         // Now remove all out of the pars which is NOT allowed in the
 118         // new environment and set also another font if that is required.
 119
 120         // Convert newline to paragraph break in ERT inset.
 121         // This should not be here!
 122         InsetCode const code = target_inset->lyxCode();
 123         if (code == ERT_CODE || code == LISTINGS_CODE) {
 124                 for (size_t i = 0; i != insertion.size(); ++i) {
 125                         for (pos_type j = 0; j != insertion[i].size(); ++j) {
 126                                 if (insertion[i].isNewline(j)) {
 127                                         // do not track deletion of newline
 128                                         insertion[i].eraseChar(j, false);
 129                                         insertion[i].setInsetOwner(target_inset);
 130                                         breakParagraphConservative(
 131                                                         buffer.params(),
 132                                                         insertion, i, j);
 133                                         break;
 134                                 }
 135                         }
 136                 }
 137         }
 138
 139         // set the paragraphs to plain layout if necessary
 140         if (cur.inset().usePlainLayout()) {
 141                 bool forcePlainLayout = cur.inset().forcePlainLayout();
 142                 Layout const & plainLayout = newDocClass->plainLayout();
 143                 Layout const & defaultLayout = newDocClass->defaultLayout();
 144                 ParagraphList::iterator const end = insertion.end();
 145                 ParagraphList::iterator par = insertion.begin();
 146                 for (; par != end; ++par) {
 147                         Layout const & parLayout = par->layout();
 148                         if (forcePlainLayout || parLayout == defaultLayout)
 149                                 par->setLayout(plainLayout);
 150                 }
 151         } else { // check if we need to reset from plain layout
 152                 Layout const & defaultLayout = newDocClass->defaultLayout();
 153                 Layout const & plainLayout = newDocClass->plainLayout();
 154                 ParagraphList::iterator const end = insertion.end();
 155                 ParagraphList::iterator par = insertion.begin();
 156                 for (; par != end; ++par) {
 157                         Layout const & parLayout = par->layout();
 158                         if (parLayout == plainLayout)
 159                                 par->setLayout(defaultLayout);
 160                 }
 161         }
 162
 163         InsetText in(buffer);
 164         // Make sure there is no class difference.
 165         in.paragraphs().clear();
 166         // This works without copying any paragraph data because we have
 167         // a specialized swap method for ParagraphList. This is important
 168         // since we store pointers to insets at some places and we don't
 169         // want to invalidate them.
 170         insertion.swap(in.paragraphs());
 171         cap::switchBetweenClasses(oldDocClass, newDocClass, in, errorlist);
 172         insertion.swap(in.paragraphs());
 173
 174         ParagraphList::iterator tmpbuf = insertion.begin();
 175         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 176
 177         depth_type max_depth = pars[pit].getMaxDepthAfter();
 178
 179         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 180                 // If we have a negative jump so that the depth would
 181                 // go below 0 depth then we have to redo the delta to
 182                 // this new max depth level so that subsequent
 183                 // paragraphs are aligned correctly to this paragraph
 184                 // at level 0.
 185                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 186                         depth_delta = 0;
 187
 188                 // Set the right depth so that we are not too deep or shallow.
 189                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 190                 if (tmpbuf->params().depth() > max_depth)
 191                         tmpbuf->params().depth(max_depth);
 192
 193                 // Only set this from the 2nd on as the 2nd depends
 194                 // for maxDepth still on pit.
 195                 if (tmpbuf != insertion.begin())
 196                         max_depth = tmpbuf->getMaxDepthAfter();
 197
 198                 // Set the inset owner of this paragraph.
 199                 tmpbuf->setInsetOwner(target_inset);
 200                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 201                         // do not track deletion of invalid insets
 202                         if (Inset * inset = tmpbuf->getInset(i))
 203                                 if (!target_inset->insetAllowed(inset->lyxCode()))
 204                                         tmpbuf->eraseChar(i--, false);
 205                 }
 206
 207                 tmpbuf->setChange(Change(buffer.params().trackChanges ?
 208                                          Change::INSERTED : Change::UNCHANGED));
 209         }
 210
 211         bool const empty = pars[pit].empty();
 212         if (!empty) {
 213                 // Make the buf exactly the same layout as the cursor
 214                 // paragraph.
 215                 insertion.begin()->makeSameLayout(pars[pit]);
 216         }
 217
 218         // Prepare the paragraphs and insets for insertion.
 219         // A couple of insets store buffer references so need updating.
 220         insertion.swap(in.paragraphs());
 221
 222         InsetIterator const i_end = inset_iterator_end(in);
 223
 224         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 225
 226                 it->setBuffer(const_cast<Buffer &>(buffer));
 227
 228                 switch (it->lyxCode()) {
 229
 230                 case LABEL_CODE: {
 231                         // check for duplicates
 232                         InsetCommand & lab = static_cast<InsetCommand &>(*it);
 233                         docstring const oldname = lab.getParam("name");
 234                         lab.updateCommand(oldname, false);
 235                         docstring const newname = lab.getParam("name");
 236                         if (oldname != newname) {
 237                                 // adapt the references
 238                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 239                                         if (itt->lyxCode() == REF_CODE) {
 240                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 241                                                 if (ref.getParam("reference") == oldname)
 242                                                         ref.setParam("reference", newname);
 243                                         }
 244                                 }
 245                         }
 246                         break;
 247                 }
 248
 249                 case BIBITEM_CODE: {
 250                         // check for duplicates
 251                         InsetCommand & bib = static_cast<InsetCommand &>(*it);
 252                         docstring const oldkey = bib.getParam("key");
 253                         bib.updateCommand(oldkey, false);
 254                         docstring const newkey = bib.getParam("key");
 255                         if (oldkey != newkey) {
 256                                 // adapt the references
 257                                 for (InsetIterator itt = inset_iterator_begin(in); itt != i_end; ++itt) {
 258                                         if (itt->lyxCode() == CITE_CODE) {
 259                                                 InsetCommand & ref = dynamic_cast<InsetCommand &>(*itt);
 260                                                 if (ref.getParam("key") == oldkey)
 261                                                         ref.setParam("key", newkey);
 262                                         }
 263                                 }
 264                         }
 265                         break;
 266                 }
 267
 268                 default:
 269                         break; // nothing
 270                 }
 271         }
 272         insertion.swap(in.paragraphs());
 273
 274         // Split the paragraph for inserting the buf if necessary.
 275         if (!empty)
 276                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 277
 278         // Paste it!
 279         if (empty) {
 280                 pars.insert(boost::next(pars.begin(), pit),
 281                             insertion.begin(),
 282                             insertion.end());
 283
 284                 // merge the empty par with the last par of the insertion
 285                 mergeParagraph(buffer.params(), pars,
 286                                pit + insertion.size() - 1);
 287         } else {
 288                 pars.insert(boost::next(pars.begin(), pit + 1),
 289                             insertion.begin(),
 290                             insertion.end());
 291
 292                 // merge the first par of the insertion with the current par
 293                 mergeParagraph(buffer.params(), pars, pit);
 294         }
 295         //FIXME: We should call setBuffer() on each inserted paragraph.
 296         // instead, we call setBuffer() for the main inset at the beginning
 297         // of updateLabels()
 298
 299         pit_type last_paste = pit + insertion.size() - 1;
 300
 301         // Store the new cursor position.
 302         pit = last_paste;
 303         pos = pars[last_paste].size();
 304
 305         // Join (conditionally) last pasted paragraph with next one, i.e.,
 306         // the tail of the spliced document paragraph
 307         if (!empty && last_paste + 1 != pit_type(pars.size())) {
 308                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 309                         mergeParagraph(buffer.params(), pars, last_paste);
 310                 } else if (pars[last_paste + 1].empty()) {
 311                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 312                         mergeParagraph(buffer.params(), pars, last_paste);
 313                 } else if (pars[last_paste].empty()) {
 314                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 315                         mergeParagraph(buffer.params(), pars, last_paste);
 316                 } else {
 317                         pars[last_paste + 1].stripLeadingSpaces(buffer.params().trackChanges);
 318                         ++last_paste;
 319                 }
 320         }
 321
 322         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 323 }
 324
 325
 326 PitPosPair eraseSelectionHelper(BufferParams const & params,
 327         ParagraphList & pars,
 328         pit_type startpit, pit_type endpit,
 329         int startpos, int endpos)
 330 {
 331         // Start of selection is really invalid.
 332         if (startpit == pit_type(pars.size()) ||
 333             (startpos > pars[startpit].size()))
 334                 return PitPosPair(endpit, endpos);
 335
 336         // Start and end is inside same paragraph
 337         if (endpit == pit_type(pars.size()) || startpit == endpit) {
 338                 endpos -= pars[startpit].eraseChars(startpos, endpos, params.trackChanges);
 339                 return PitPosPair(endpit, endpos);
 340         }
 341
 342         for (pit_type pit = startpit; pit != endpit + 1;) {
 343                 pos_type const left  = (pit == startpit ? startpos : 0);
 344                 pos_type right = (pit == endpit ? endpos : pars[pit].size() + 1);
 345                 bool const merge = pars[pit].isMergedOnEndOfParDeletion(params.trackChanges);
 346
 347                 // Logically erase only, including the end-of-paragraph character
 348                 pars[pit].eraseChars(left, right, params.trackChanges);
 349
 350                 // Separate handling of paragraph break:
 351                 if (merge && pit != endpit &&
 352                     (pit + 1 != endpit
 353                      || pars[pit].hasSameLayout(pars[endpit])
 354                      || pars[endpit].size() == endpos)) {
 355                         if (pit + 1 == endpit)
 356                                 endpos += pars[pit].size();
 357                         mergeParagraph(params, pars, pit);
 358                         --endpit;
 359                 } else
 360                         ++pit;
 361         }
 362
 363         // Ensure legal cursor pos:
 364         endpit = startpit;
 365         endpos = startpos;
 366         return PitPosPair(endpit, endpos);
 367 }
 368
 369
 370 void putClipboard(ParagraphList const & paragraphs,
 371         DocumentClass const * const docclass, docstring const & plaintext)
 372 {
 373         // For some strange reason gcc 3.2 and 3.3 do not accept
 374         // Buffer buffer(string(), false);
 375         // This needs to be static to avoid a memory leak. When a Buffer is
 376         // constructed, it constructs a BufferParams, which in turn constructs
 377         // a DocumentClass, via new, that is never deleted. If we were to go to
 378         // some kind of garbage collection there, or a shared_ptr, then this
 379         // would not be needed.
 380         static Buffer * buffer = theBufferList().newBuffer(
 381                 FileName::tempName().absFilename() + "_clipboard.internal");
 382         buffer->setUnnamed(true);
 383         buffer->paragraphs() = paragraphs;
 384         buffer->inset().setBuffer(*buffer);
 385         buffer->params().setDocumentClass(docclass);
 386         ostringstream lyx;
 387         if (buffer->write(lyx))
 388                 theClipboard().put(lyx.str(), plaintext);
 389         else
 390                 theClipboard().put(string(), plaintext);
 391         // Save that memory
 392         buffer->paragraphs().clear();
 393 }
 394
 395
 396 void copySelectionHelper(Buffer const & buf, ParagraphList const & pars,
 397         pit_type startpit, pit_type endpit,
 398         int start, int end, DocumentClass const * const dc, CutStack & cutstack)
 399 {
 400         LASSERT(0 <= start && start <= pars[startpit].size(), /**/);
 401         LASSERT(0 <= end && end <= pars[endpit].size(), /**/);
 402         LASSERT(startpit != endpit || start <= end, /**/);
 403
 404         // Clone the paragraphs within the selection.
 405         ParagraphList copy_pars(boost::next(pars.begin(), startpit),
 406                                 boost::next(pars.begin(), endpit + 1));
 407
 408         // Remove the end of the last paragraph; afterwards, remove the
 409         // beginning of the first paragraph. Keep this order - there may only
 410         // be one paragraph!  Do not track deletions here; this is an internal
 411         // action not visible to the user
 412
 413         Paragraph & back = copy_pars.back();
 414         back.eraseChars(end, back.size(), false);
 415         Paragraph & front = copy_pars.front();
 416         front.eraseChars(0, start, false);
 417
 418         ParagraphList::iterator it = copy_pars.begin();
 419         ParagraphList::iterator it_end = copy_pars.end();
 420
 421         for (; it != it_end; it++) {
 422                 // ERT paragraphs have the Language latex_language.
 423                 // This is invalid outside of ERT, so we need to change it
 424                 // to the buffer language.
 425                 if (it->ownerCode() == ERT_CODE || it->ownerCode() == LISTINGS_CODE) {
 426                         it->changeLanguage(buf.params(), latex_language, buf.language());
 427                 }
 428                 it->setInsetOwner(0);
 429         }
 430
 431         // do not copy text (also nested in insets) which is marked as deleted
 432         acceptChanges(copy_pars, buf.params());
 433
 434         DocumentClass * d = const_cast<DocumentClass *>(dc);
 435         cutstack.push(make_pair(copy_pars, d));
 436 }
 437
 438 } // namespace anon
 439
 440
 441
 442
 443 namespace cap {
 444
 445 void region(CursorSlice const & i1, CursorSlice const & i2,
 446             Inset::row_type & r1, Inset::row_type & r2,
 447             Inset::col_type & c1, Inset::col_type & c2)
 448 {
 449         Inset & p = i1.inset();
 450         c1 = p.col(i1.idx());
 451         c2 = p.col(i2.idx());
 452         if (c1 > c2)
 453                 swap(c1, c2);
 454         r1 = p.row(i1.idx());
 455         r2 = p.row(i2.idx());
 456         if (r1 > r2)
 457                 swap(r1, r2);
 458 }
 459
 460
 461 docstring grabAndEraseSelection(Cursor & cur)
 462 {
 463         if (!cur.selection())
 464                 return docstring();
 465         docstring res = grabSelection(cur);
 466         eraseSelection(cur);
 467         return res;
 468 }
 469
 470
 471 bool reduceSelectionToOneCell(Cursor & cur)
 472 {
 473         if (!cur.selection() || !cur.inMathed())
 474                 return false;
 475
 476         CursorSlice i1 = cur.selBegin();
 477         CursorSlice i2 = cur.selEnd();
 478         if (!i1.inset().asInsetMath())
 479                 return false;
 480
 481         // the easy case: do nothing if only one cell is selected
 482         if (i1.idx() == i2.idx())
 483                 return true;
 484
 485         cur.top().pos() = 0;
 486         cur.resetAnchor();
 487         cur.top().pos() = cur.top().lastpos();
 488
 489         return true;
 490 }
 491
 492
 493 bool multipleCellsSelected(Cursor const & cur)
 494 {
 495         if (!cur.selection() || !cur.inMathed())
 496                 return false;
 497
 498         CursorSlice i1 = cur.selBegin();
 499         CursorSlice i2 = cur.selEnd();
 500         if (!i1.inset().asInsetMath())
 501                 return false;
 502
 503         if (i1.idx() == i2.idx())
 504                 return false;
 505
 506         return true;
 507 }
 508
 509
 510 void switchBetweenClasses(DocumentClass const * const oldone,
 511                 DocumentClass const * const newone, InsetText & in, ErrorList & errorlist)
 512 {
 513         errorlist.clear();
 514
 515         LASSERT(!in.paragraphs().empty(), /**/);
 516         if (oldone == newone)
 517                 return;
 518
 519         DocumentClass const & oldtc = *oldone;
 520         DocumentClass const & newtc = *newone;
 521
 522         // layouts
 523         ParIterator end = par_iterator_end(in);
 524         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 525                 docstring const name = it->layout().name();
 526
 527                 // the pasted text will keep their own layout name. If this layout does
 528                 // not exist in the new document, it will behave like a standard layout.
 529                 newtc.addLayoutIfNeeded(name);
 530
 531                 if (in.usePlainLayout())
 532                         it->setLayout(newtc.plainLayout());
 533                 else
 534                         it->setLayout(newtc[name]);
 535         }
 536
 537         // character styles
 538         InsetIterator const i_end = inset_iterator_end(in);
 539         for (InsetIterator it = inset_iterator_begin(in); it != i_end; ++it) {
 540                 InsetCollapsable * inset = it->asInsetCollapsable();
 541                 if (!inset)
 542                         continue;
 543                 if (inset->lyxCode() != FLEX_CODE)
 544                         // FIXME: Should we verify all InsetCollapsable?
 545                         continue;
 546                 inset->setLayout(newone);
 547                 if (!inset->undefined())
 548                         continue;
 549                 // The flex inset is undefined in newtc
 550                 docstring const s = bformat(_(
 551                         "Flex inset %1$s is "
 552                         "undefined because of class "
 553                         "conversion from\n%2$s to %3$s"),
 554                         inset->name(), from_utf8(oldtc.name()),
 555                         from_utf8(newtc.name()));
 556                 // To warn the user that something had to be done.
 557                 errorlist.push_back(ErrorItem(
 558                                 _("Undefined flex inset"),
 559                                 s, it.paragraph().id(), it.pos(), it.pos() + 1));
 560         }
 561 }
 562
 563
 564 vector<docstring> availableSelections(Buffer const * buf)
 565 {
 566         vector<docstring> selList;
 567         if (!buf)
 568                 return selList;
 569
 570         CutStack::const_iterator cit = theCuts.begin();
 571         CutStack::const_iterator end = theCuts.end();
 572         for (; cit != end; ++cit) {
 573                 // we do not use cit-> here because gcc 2.9x does not
 574                 // like it (JMarc)
 575                 ParagraphList const & pars = (*cit).first;
 576                 docstring asciiSel;
 577                 ParagraphList::const_iterator pit = pars.begin();
 578                 ParagraphList::const_iterator pend = pars.end();
 579                 for (; pit != pend; ++pit) {
 580                         Paragraph par(*pit, 0, 26);
 581                         // adapt paragraph to current buffer.
 582                         par.setBuffer(const_cast<Buffer &>(*buf));
 583                         asciiSel += par.asString(AS_STR_INSETS);
 584                         if (asciiSel.size() > 25) {
 585                                 asciiSel.replace(22, docstring::npos,
 586                                                  from_ascii("..."));
 587                                 break;
 588                         }
 589                 }
 590
 591                 selList.push_back(asciiSel);
 592         }
 593
 594         return selList;
 595 }
 596
 597
 598 size_type numberOfSelections()
 599 {
 600         return theCuts.size();
 601 }
 602
 603
 604 void cutSelection(Cursor & cur, bool doclear, bool realcut)
 605 {
 606         // This doesn't make sense, if there is no selection
 607         if (!cur.selection())
 608                 return;
 609
 610         // OK, we have a selection. This is always between cur.selBegin()
 611         // and cur.selEnd()
 612
 613         if (cur.inTexted()) {
 614                 Text * text = cur.text();
 615                 LASSERT(text, /**/);
 616
 617                 saveSelection(cur);
 618
 619                 // make sure that the depth behind the selection are restored, too
 620                 cur.recordUndoSelection();
 621                 pit_type begpit = cur.selBegin().pit();
 622                 pit_type endpit = cur.selEnd().pit();
 623
 624                 int endpos = cur.selEnd().pos();
 625
 626                 BufferParams const & bp = cur.buffer().params();
 627                 if (realcut) {
 628                         copySelectionHelper(cur.buffer(),
 629                                 text->paragraphs(),
 630                                 begpit, endpit,
 631                                 cur.selBegin().pos(), endpos,
 632                                 bp.documentClassPtr(), theCuts);
 633                         // Stuff what we got on the clipboard.
 634                         // Even if there is no selection.
 635                         putClipboard(theCuts[0].first, theCuts[0].second,
 636                                 cur.selectionAsString(true));
 637                 }
 638
 639                 if (begpit != endpit)
 640                         cur.updateFlags(Update::Force | Update::FitCursor);
 641
 642                 boost::tie(endpit, endpos) =
 643                         eraseSelectionHelper(bp,
 644                                 text->paragraphs(),
 645                                 begpit, endpit,
 646                                 cur.selBegin().pos(), endpos);
 647
 648                 // cutSelection can invalidate the cursor so we need to set
 649                 // it anew. (Lgb)
 650                 // we prefer the end for when tracking changes
 651                 cur.pos() = endpos;
 652                 cur.pit() = endpit;
 653
 654                 // sometimes necessary
 655                 if (doclear
 656                         && text->paragraphs()[begpit].stripLeadingSpaces(bp.trackChanges))
 657                         cur.fixIfBroken();
 658
 659                 // need a valid cursor. (Lgb)
 660                 cur.clearSelection();
 661                 updateLabels(cur.buffer());
 662
 663                 // tell tabular that a recent copy happened
 664                 dirtyTabularStack(false);
 665         }
 666
 667         if (cur.inMathed()) {
 668                 if (cur.selBegin().idx() != cur.selEnd().idx()) {
 669                         // The current selection spans more than one cell.
 670                         // Record all cells
 671                         cur.recordUndoInset();
 672                 } else {
 673                         // Record only the current cell to avoid a jumping
 674                         // cursor after undo
 675                         cur.recordUndo();
 676                 }
 677                 if (realcut)
 678                         copySelection(cur);
 679                 eraseSelection(cur);
 680         }
 681 }
 682
 683
 684 void copySelection(Cursor const & cur)
 685 {
 686         copySelection(cur, cur.selectionAsString(true));
 687 }
 688
 689
 690 namespace {
 691
 692 void copySelectionToStack(Cursor const & cur, CutStack & cutstack)
 693 {
 694         // this doesn't make sense, if there is no selection
 695         if (!cur.selection())
 696                 return;
 697
 698         // copySelection can not yet handle the case of cross idx selection
 699         if (cur.selBegin().idx() != cur.selEnd().idx())
 700                 return;
 701
 702         if (cur.inTexted()) {
 703                 Text * text = cur.text();
 704                 LASSERT(text, /**/);
 705                 // ok we have a selection. This is always between cur.selBegin()
 706                 // and sel_end cursor
 707
 708                 // copy behind a space if there is one
 709                 ParagraphList & pars = text->paragraphs();
 710                 pos_type pos = cur.selBegin().pos();
 711                 pit_type par = cur.selBegin().pit();
 712                 while (pos < pars[par].size() &&
 713                        pars[par].isLineSeparator(pos) &&
 714                        (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 715                         ++pos;
 716
 717                 copySelectionHelper(cur.buffer(), pars, par, cur.selEnd().pit(),
 718                         pos, cur.selEnd().pos(),
 719                         cur.buffer().params().documentClassPtr(), cutstack);
 720                 dirtyTabularStack(false);
 721         }
 722
 723         if (cur.inMathed()) {
 724                 //lyxerr << "copySelection in mathed" << endl;
 725                 ParagraphList pars;
 726                 Paragraph par;
 727                 BufferParams const & bp = cur.buffer().params();
 728                 // FIXME This should be the plain layout...right?
 729                 par.setLayout(bp.documentClass().plainLayout());
 730                 par.insert(0, grabSelection(cur), Font(), Change(Change::UNCHANGED));
 731                 pars.push_back(par);
 732                 cutstack.push(make_pair(pars, bp.documentClassPtr()));
 733         }
 734 }
 735
 736 }
 737
 738
 739 void copySelectionToStack()
 740 {
 741         if (!selectionBuffer.empty())
 742                 theCuts.push(selectionBuffer[0]);
 743 }
 744
 745
 746 void copySelection(Cursor const & cur, docstring const & plaintext)
 747 {
 748         // In tablemode, because copy and paste actually use special table stack
 749         // we do not attempt to get selected paragraphs under cursor. Instead, a
 750         // paragraph with the plain text version is generated so that table cells
 751         // can be pasted as pure text somewhere else.
 752         if (cur.selBegin().idx() != cur.selEnd().idx()) {
 753                 ParagraphList pars;
 754                 Paragraph par;
 755                 BufferParams const & bp = cur.buffer().params();
 756                 par.setLayout(bp.documentClass().plainLayout());
 757                 par.insert(0, plaintext, Font(), Change(Change::UNCHANGED));
 758                 pars.push_back(par);
 759                 theCuts.push(make_pair(pars, bp.documentClassPtr()));
 760         } else {
 761                 copySelectionToStack(cur, theCuts);
 762         }
 763
 764         // stuff the selection onto the X clipboard, from an explicit copy request
 765         putClipboard(theCuts[0].first, theCuts[0].second, plaintext);
 766 }
 767
 768
 769 void saveSelection(Cursor const & cur)
 770 {
 771         // This function is called, not when a selection is formed, but when
 772         // a selection is cleared. Therefore, multiple keyboard selection
 773         // will not repeatively trigger this function (bug 3877).
 774         if (cur.selection()
 775             && cur.selBegin() == cur.bv().cursor().selBegin()
 776             && cur.selEnd() == cur.bv().cursor().selEnd()) {
 777                 LYXERR(Debug::SELECTION, "saveSelection: '" << cur.selectionAsString(true) << "'");
 778                 copySelectionToStack(cur, selectionBuffer);
 779         }
 780 }
 781
 782
 783 bool selection()
 784 {
 785         return !selectionBuffer.empty();
 786 }
 787
 788
 789 void clearSelection()
 790 {
 791         selectionBuffer.clear();
 792 }
 793
 794
 795 void clearCutStack()
 796 {
 797         theCuts.clear();
 798 }
 799
 800
 801 docstring selection(size_t sel_index)
 802 {
 803         return sel_index < theCuts.size()
 804                 ? theCuts[sel_index].first.back().asString(AS_STR_INSETS)
 805                 : docstring();
 806 }
 807
 808
 809 void pasteParagraphList(Cursor & cur, ParagraphList const & parlist,
 810                         DocumentClass const * const docclass, ErrorList & errorList)
 811 {
 812         if (cur.inTexted()) {
 813                 Text * text = cur.text();
 814                 LASSERT(text, /**/);
 815
 816                 pit_type endpit;
 817                 PitPosPair ppp;
 818
 819                 boost::tie(ppp, endpit) =
 820                         pasteSelectionHelper(cur, parlist, docclass, errorList);
 821                 updateLabels(cur.buffer());
 822                 cur.clearSelection();
 823                 text->setCursor(cur, ppp.first, ppp.second);
 824         }
 825
 826         // mathed is handled in InsetMathNest/InsetMathGrid
 827         LASSERT(!cur.inMathed(), /**/);
 828 }
 829
 830
 831 void pasteFromStack(Cursor & cur, ErrorList & errorList, size_t sel_index)
 832 {
 833         // this does not make sense, if there is nothing to paste
 834         if (!checkPastePossible(sel_index))
 835                 return;
 836
 837         cur.recordUndo();
 838         pasteParagraphList(cur, theCuts[sel_index].first,
 839                            theCuts[sel_index].second, errorList);
 840         cur.setSelection();
 841 }
 842
 843
 844 void pasteClipboardText(Cursor & cur, ErrorList & errorList, bool asParagraphs)
 845 {
 846         // Use internal clipboard if it is the most recent one
 847         if (theClipboard().isInternal()) {
 848                 pasteFromStack(cur, errorList, 0);
 849                 return;
 850         }
 851
 852         // First try LyX format
 853         if (theClipboard().hasLyXContents()) {
 854                 string lyx = theClipboard().getAsLyX();
 855                 if (!lyx.empty()) {
 856                         // For some strange reason gcc 3.2 and 3.3 do not accept
 857                         // Buffer buffer(string(), false);
 858                         Buffer buffer("", false);
 859                         buffer.setUnnamed(true);
 860                         if (buffer.readString(lyx)) {
 861                                 cur.recordUndo();
 862                                 pasteParagraphList(cur, buffer.paragraphs(),
 863                                         buffer.params().documentClassPtr(), errorList);
 864                                 cur.setSelection();
 865                                 return;
 866                         }
 867                 }
 868         }
 869
 870         // Then try plain text
 871         docstring const text = theClipboard().getAsText();
 872         if (text.empty())
 873                 return;
 874         cur.recordUndo();
 875         if (asParagraphs)
 876                 cur.text()->insertStringAsParagraphs(cur, text);
 877         else
 878                 cur.text()->insertStringAsLines(cur, text);
 879 }
 880
 881
 882 void pasteClipboardGraphics(Cursor & cur, ErrorList & /* errorList */,
 883                             Clipboard::GraphicsType preferedType)
 884 {
 885         LASSERT(theClipboard().hasGraphicsContents(preferedType), /**/);
 886
 887         // get picture from clipboard
 888         FileName filename = theClipboard().getAsGraphics(cur, preferedType);
 889         if (filename.empty())
 890                 return;
 891
 892         // create inset for graphic
 893         InsetGraphics * inset = new InsetGraphics(cur.buffer());
 894         InsetGraphicsParams params;
 895         params.filename = support::DocFileName(filename.absFilename());
 896         inset->setParams(params);
 897         cur.recordUndo();
 898         cur.insert(inset);
 899 }
 900
 901
 902 void pasteSelection(Cursor & cur, ErrorList & errorList)
 903 {
 904         if (selectionBuffer.empty())
 905                 return;
 906         cur.recordUndo();
 907         pasteParagraphList(cur, selectionBuffer[0].first,
 908                            selectionBuffer[0].second, errorList);
 909 }
 910
 911
 912 void replaceSelectionWithString(Cursor & cur, docstring const & str, bool backwards)
 913 {
 914         cur.recordUndo();
 915         DocIterator selbeg = cur.selectionBegin();
 916
 917         // Get font setting before we cut
 918         Font const font =
 919                 selbeg.paragraph().getFontSettings(cur.buffer().params(), selbeg.pos());
 920
 921         // Insert the new string
 922         pos_type pos = cur.selEnd().pos();
 923         Paragraph & par = cur.selEnd().paragraph();
 924         docstring::const_iterator cit = str.begin();
 925         docstring::const_iterator end = str.end();
 926         for (; cit != end; ++cit, ++pos)
 927                 par.insertChar(pos, *cit, font, cur.buffer().params().trackChanges);
 928
 929         // Cut the selection
 930         cutSelection(cur, true, false);
 931
 932         // select the replacement
 933         if (backwards) {
 934                 selbeg.pos() += str.length();
 935                 cur.setSelection(selbeg, -int(str.length()));
 936         } else
 937                 cur.setSelection(selbeg, str.length());
 938 }
 939
 940
 941 void replaceSelection(Cursor & cur)
 942 {
 943         if (cur.selection())
 944                 cutSelection(cur, true, false);
 945 }
 946
 947
 948 void eraseSelection(Cursor & cur)
 949 {
 950         //lyxerr << "cap::eraseSelection begin: " << cur << endl;
 951         CursorSlice const & i1 = cur.selBegin();
 952         CursorSlice const & i2 = cur.selEnd();
 953         if (i1.inset().asInsetMath()) {
 954                 saveSelection(cur);
 955                 cur.top() = i1;
 956                 if (i1.idx() == i2.idx()) {
 957                         i1.cell().erase(i1.pos(), i2.pos());
 958                         // We may have deleted i1.cell(cur.pos()).
 959                         // Make sure that pos is valid.
 960                         if (cur.pos() > cur.lastpos())
 961                                 cur.pos() = cur.lastpos();
 962                 } else {
 963                         InsetMath * p = i1.asInsetMath();
 964                         Inset::row_type r1, r2;
 965                         Inset::col_type c1, c2;
 966                         region(i1, i2, r1, r2, c1, c2);
 967                         for (Inset::row_type row = r1; row <= r2; ++row)
 968                                 for (Inset::col_type col = c1; col <= c2; ++col)
 969                                         p->cell(p->index(row, col)).clear();
 970                         // We've deleted the whole cell. Only pos 0 is valid.
 971                         cur.pos() = 0;
 972                 }
 973                 // need a valid cursor. (Lgb)
 974                 cur.clearSelection();
 975         } else {
 976                 lyxerr << "can't erase this selection 1" << endl;
 977         }
 978         //lyxerr << "cap::eraseSelection end: " << cur << endl;
 979 }
 980
 981
 982 void selDel(Cursor & cur)
 983 {
 984         //lyxerr << "cap::selDel" << endl;
 985         if (cur.selection())
 986                 eraseSelection(cur);
 987 }
 988
 989
 990 void selClearOrDel(Cursor & cur)
 991 {
 992         //lyxerr << "cap::selClearOrDel" << endl;
 993         if (lyxrc.auto_region_delete)
 994                 selDel(cur);
 995         else
 996                 cur.setSelection(false);
 997 }
 998
 999
1000 docstring grabSelection(Cursor const & cur)
1001 {
1002         if (!cur.selection())
1003                 return docstring();
1004
1005 #if 0
1006         // grab selection by glueing multiple cells together. This is not what
1007         // we want because selections spanning multiple cells will get "&" and "\\"
1008         // seperators.
1009         ostringstream os;
1010         for (DocIterator dit = cur.selectionBegin();
1011              dit != cur.selectionEnd(); dit.forwardPos())
1012                 os << asString(dit.cell());
1013         return os.str();
1014 #endif
1015
1016         CursorSlice i1 = cur.selBegin();
1017         CursorSlice i2 = cur.selEnd();
1018
1019         if (i1.idx() == i2.idx()) {
1020                 if (i1.inset().asInsetMath()) {
1021                         MathData::const_iterator it = i1.cell().begin();
1022                         return asString(MathData(it + i1.pos(), it + i2.pos()));
1023                 } else {
1024                         return from_ascii("unknown selection 1");
1025                 }
1026         }
1027
1028         Inset::row_type r1, r2;
1029         Inset::col_type c1, c2;
1030         region(i1, i2, r1, r2, c1, c2);
1031
1032         docstring data;
1033         if (i1.inset().asInsetMath()) {
1034                 for (Inset::row_type row = r1; row <= r2; ++row) {
1035                         if (row > r1)
1036                                 data += "\\\\";
1037                         for (Inset::col_type col = c1; col <= c2; ++col) {
1038                                 if (col > c1)
1039                                         data += '&';
1040                                 data += asString(i1.asInsetMath()->
1041                                         cell(i1.asInsetMath()->index(row, col)));
1042                         }
1043                 }
1044         } else {
1045                 data = from_ascii("unknown selection 2");
1046         }
1047         return data;
1048 }
1049
1050
1051 void dirtyTabularStack(bool b)
1052 {
1053         dirty_tabular_stack_ = b;
1054 }
1055
1056
1057 bool tabularStackDirty()
1058 {
1059         return dirty_tabular_stack_;
1060 }
1061
1062
1063 } // namespace cap
1064
1065 } // namespace lyx