src/CutAndPaste.C

   1 /*
   2  * \file CutAndPaste.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Jürgen Vigna
   7  * \author Lars Gullik Bjønnes
   8  * \author Alfredo Braunstein
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "CutAndPaste.h"
  16
  17 #include "buffer.h"
  18 #include "bufferparams.h"
  19 #include "errorlist.h"
  20 #include "gettext.h"
  21 #include "iterators.h"
  22 #include "lyxtextclasslist.h"
  23 #include "paragraph.h"
  24 #include "paragraph_funcs.h"
  25 #include "ParagraphParameters.h"
  26
  27 #include "insets/insettabular.h"
  28
  29 #include "support/lstrings.h"
  30
  31 using lyx::pos_type;
  32 using lyx::textclass_type;
  33
  34 using lyx::support::bformat;
  35
  36 using std::for_each;
  37 using std::make_pair;
  38 using std::pair;
  39 using std::vector;
  40 using std::string;
  41
  42
  43 typedef limited_stack<pair<ParagraphList, textclass_type> > CutStack;
  44
  45 namespace {
  46
  47 CutStack cuts(10);
  48
  49 } // namespace anon
  50
  51
  52 std::vector<string> const
  53 CutAndPaste::availableSelections(Buffer const & buffer)
  54 {
  55         vector<string> selList;
  56
  57         CutStack::const_iterator cit = cuts.begin();
  58         CutStack::const_iterator end = cuts.end();
  59         for (; cit != end; ++cit) {
  60                 // we do not use cit-> here because gcc 2.9x does not
  61                 // like it (JMarc)
  62                 ParagraphList const & pars = (*cit).first;
  63                 string asciiSel;
  64                 ParagraphList::const_iterator pit = pars.begin();
  65                 ParagraphList::const_iterator pend = pars.end();
  66                 for (; pit != pend; ++pit) {
  67                         asciiSel += pit->asString(buffer, false);
  68                         if (asciiSel.size() > 25) {
  69                                 asciiSel.replace(22, string::npos, "...");
  70                                 break;
  71                         }
  72                 }
  73
  74                 selList.push_back(asciiSel);
  75         }
  76
  77         return selList;
  78 }
  79
  80
  81 PitPosPair CutAndPaste::cutSelection(BufferParams const & params,
  82                                      ParagraphList & pars,
  83                                      ParagraphList::iterator startpit,
  84                                      ParagraphList::iterator endpit,
  85                                      int startpos, int endpos,
  86                                      textclass_type tc, bool doclear)
  87 {
  88         copySelection(startpit, endpit, startpos, endpos, tc);
  89         return eraseSelection(params, pars, startpit, endpit, startpos,
  90                               endpos, doclear);
  91 }
  92
  93
  94 PitPosPair CutAndPaste::eraseSelection(BufferParams const & params,
  95                                        ParagraphList & pars,
  96                                        ParagraphList::iterator startpit,
  97                                        ParagraphList::iterator endpit,
  98                                        int startpos, int endpos, bool doclear)
  99 {
 100         if (startpit == pars.end() || (startpos > startpit->size()))
 101                 return PitPosPair(endpit, endpos);
 102
 103         if (endpit == pars.end() || startpit == endpit) {
 104                 endpos -= startpit->erase(startpos, endpos);
 105                 return PitPosPair(endpit, endpos);
 106         }
 107
 108         // clear end/begin fragments of the first/last par in selection
 109         bool all_erased = true;
 110
 111         startpit->erase(startpos, startpit->size());
 112         if (startpit->size() != startpos)
 113                 all_erased = false;
 114
 115         endpos -= endpit->erase(0, endpos);
 116         if (endpos != 0)
 117                 all_erased = false;
 118
 119         // Loop through the deleted pars if any, erasing as needed
 120
 121         ParagraphList::iterator pit = boost::next(startpit);
 122
 123         while (pit != endpit && pit != pars.end()) {
 124                 ParagraphList::iterator const next = boost::next(pit);
 125                 // "erase" the contents of the par
 126                 pit->erase(0, pit->size());
 127                 if (!pit->size()) {
 128                         // remove the par if it's now empty
 129                         pars.erase(pit);
 130                 } else
 131                         all_erased = false;
 132                 pit = next;
 133         }
 134
 135 #if 0 // FIXME: why for cut but not copy ?
 136         // the cut selection should begin with standard layout
 137         if (realcut) {
 138                 buf->params().clear();
 139                 buf->bibkey = 0;
 140                 buf->layout(textclasslist[buffer->params.textclass].defaultLayoutName());
 141         }
 142 #endif
 143
 144         if (boost::next(startpit) == pars.end())
 145                 return PitPosPair(endpit, endpos);
 146
 147         if (doclear) {
 148                 boost::next(startpit)->stripLeadingSpaces();
 149         }
 150
 151         // paste the paragraphs again, if possible
 152         if (all_erased &&
 153             (startpit->hasSameLayout(*boost::next(startpit)) ||
 154              boost::next(startpit)->empty())) {
 155                 mergeParagraph(params, pars, startpit);
 156                 // this because endpar gets deleted here!
 157                 endpit = startpit;
 158                 endpos = startpos;
 159         }
 160
 161         return PitPosPair(endpit, endpos);
 162
 163 }
 164
 165
 166 namespace {
 167
 168 struct resetOwnerAndChanges : public std::unary_function<Paragraph, void> {
 169         void operator()(Paragraph & p) const {
 170                 p.cleanChanges();
 171                 p.setInsetOwner(0);
 172         }
 173 };
 174
 175 } // anon namespace
 176
 177 bool CutAndPaste::copySelection(ParagraphList::iterator startpit,
 178                                 ParagraphList::iterator endpit,
 179                                 int start, int end, textclass_type tc)
 180 {
 181         BOOST_ASSERT(0 <= start && start <= startpit->size());
 182         BOOST_ASSERT(0 <= end && end <= endpit->size());
 183         BOOST_ASSERT(startpit != endpit || start <= end);
 184
 185
 186         // Clone the paragraphs within the selection.
 187         ParagraphList::iterator postend = boost::next(endpit);
 188
 189         ParagraphList paragraphs(startpit, postend);
 190         for_each(paragraphs.begin(), paragraphs.end(), resetOwnerAndChanges());
 191
 192         // Cut out the end of the last paragraph.
 193         Paragraph & back = paragraphs.back();
 194         back.erase(end, back.size());
 195
 196         // Cut out the begin of the first paragraph
 197         Paragraph & front = paragraphs.front();
 198         front.erase(0, start);
 199
 200         cuts.push(make_pair(paragraphs, tc));
 201
 202         return true;
 203 }
 204
 205
 206 pair<PitPosPair, ParagraphList::iterator>
 207 CutAndPaste::pasteSelection(Buffer const & buffer,
 208                             ParagraphList & pars,
 209                             ParagraphList::iterator pit, int pos,
 210                             textclass_type tc,
 211                             ErrorList & errorlist)
 212 {
 213         return pasteSelection(buffer, pars, pit, pos, tc, 0, errorlist);
 214 }
 215
 216
 217 pair<PitPosPair, ParagraphList::iterator>
 218 CutAndPaste::pasteSelection(Buffer const & buffer,
 219                             ParagraphList & pars,
 220                             ParagraphList::iterator pit, int pos,
 221                             textclass_type tc, size_t cut_index,
 222                             ErrorList & errorlist)
 223 {
 224         if (!checkPastePossible())
 225                 return make_pair(PitPosPair(pit, pos), pit);
 226
 227         BOOST_ASSERT (pos <= pit->size());
 228
 229         // Make a copy of the CaP paragraphs.
 230         ParagraphList simple_cut_clone = cuts[cut_index].first;
 231         textclass_type const textclass = cuts[cut_index].second;
 232
 233         // Now remove all out of the pars which is NOT allowed in the
 234         // new environment and set also another font if that is required.
 235
 236         // Make sure there is no class difference.
 237         SwitchLayoutsBetweenClasses(textclass, tc, simple_cut_clone,
 238                                     errorlist);
 239
 240         ParagraphList::iterator tmpbuf = simple_cut_clone.begin();
 241         int depth_delta = pit->params().depth() - tmpbuf->params().depth();
 242
 243         Paragraph::depth_type max_depth = pit->getMaxDepthAfter();
 244
 245         for (; tmpbuf != simple_cut_clone.end(); ++tmpbuf) {
 246                 // If we have a negative jump so that the depth would
 247                 // go below 0 depth then we have to redo the delta to
 248                 // this new max depth level so that subsequent
 249                 // paragraphs are aligned correctly to this paragraph
 250                 // at level 0.
 251                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 252                         depth_delta = 0;
 253
 254                 // Set the right depth so that we are not too deep or shallow.
 255                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 256                 if (tmpbuf->params().depth() > max_depth)
 257                         tmpbuf->params().depth(max_depth);
 258
 259                 // Only set this from the 2nd on as the 2nd depends
 260                 // for maxDepth still on pit.
 261                 if (tmpbuf != simple_cut_clone.begin())
 262                         max_depth = tmpbuf->getMaxDepthAfter();
 263
 264                 // Set the inset owner of this paragraph.
 265                 tmpbuf->setInsetOwner(pit->inInset());
 266                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 267                         if (tmpbuf->getChar(i) == Paragraph::META_INSET) {
 268                                 if (!pit->insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 269                                         tmpbuf->erase(i--);
 270                         }
 271                 }
 272         }
 273
 274         // Make the buf exactly the same layout than
 275         // the cursor paragraph.
 276         simple_cut_clone.begin()->makeSameLayout(*pit);
 277
 278         // Prepare the paragraphs and insets for insertion
 279         // A couple of insets store buffer references so need
 280         // updating
 281         ParIterator fpit(simple_cut_clone.begin(), simple_cut_clone);
 282         ParIterator fend(simple_cut_clone.end(), simple_cut_clone);
 283
 284         for (; fpit != fend; ++fpit) {
 285                 InsetList::iterator lit = fpit->insetlist.begin();
 286                 InsetList::iterator eit = fpit->insetlist.end();
 287
 288                 for (; lit != eit; ++lit) {
 289                         switch (lit->inset->lyxCode()) {
 290                         case InsetOld::TABULAR_CODE: {
 291                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 292                                 it->buffer(const_cast<Buffer*>(&buffer));
 293                                 break;
 294                         }
 295
 296                         default:
 297                                 break; // nothing
 298                         }
 299                 }
 300         }
 301
 302         bool paste_the_end = false;
 303
 304         // Open the paragraph for inserting the buf
 305         // if necessary.
 306         if (pit->size() > pos || boost::next(pit) == pars.end()) {
 307                 breakParagraphConservative(buffer.params(),
 308                                            pars, pit, pos);
 309                 paste_the_end = true;
 310         }
 311
 312         // Set the end for redoing later.
 313         ParagraphList::iterator endpit = boost::next(boost::next(pit));
 314
 315         // Paste it!
 316
 317         ParagraphList::iterator past_pit = boost::next(pit);
 318         pars.splice(past_pit, simple_cut_clone);
 319         ParagraphList::iterator last_paste = boost::prior(past_pit);
 320
 321         // If we only inserted one paragraph.
 322         if (boost::next(pit) == last_paste)
 323                 last_paste = pit;
 324
 325         mergeParagraph(buffer.params(), pars, pit);
 326
 327         // Store the new cursor position.
 328         pit = last_paste;
 329         pos = last_paste->size();
 330
 331         // Maybe some pasting.
 332         if (boost::next(last_paste) != pars.end() &&
 333             paste_the_end) {
 334                 if (boost::next(last_paste)->hasSameLayout(*last_paste)) {
 335                         mergeParagraph(buffer.params(), pars,
 336                                        last_paste);
 337                 } else if (boost::next(last_paste)->empty()) {
 338                         boost::next(last_paste)->makeSameLayout(*last_paste);
 339                         mergeParagraph(buffer.params(), pars,
 340                                        last_paste);
 341                 } else if (last_paste->empty()) {
 342                         last_paste->makeSameLayout(*boost::next(last_paste));
 343                         mergeParagraph(buffer.params(), pars,
 344                                        last_paste);
 345                 } else
 346                         boost::next(last_paste)->stripLeadingSpaces();
 347         }
 348
 349         return make_pair(PitPosPair(pit, pos), endpit);
 350 }
 351
 352
 353 int CutAndPaste::nrOfParagraphs()
 354 {
 355         return cuts.empty() ? 0 : cuts[0].first.size();
 356 }
 357
 358
 359 int CutAndPaste::SwitchLayoutsBetweenClasses(textclass_type c1,
 360                                              textclass_type c2,
 361                                              ParagraphList & pars,
 362                                              ErrorList & errorlist)
 363 {
 364         BOOST_ASSERT(!pars.empty());
 365
 366         int ret = 0;
 367         if (c1 == c2)
 368                 return ret;
 369
 370         LyXTextClass const & tclass1 = textclasslist[c1];
 371         LyXTextClass const & tclass2 = textclasslist[c2];
 372         ParIterator end = ParIterator(pars.end(), pars);
 373         for (ParIterator it = ParIterator(pars.begin(), pars); it != end; ++it) {
 374                 string const name = it->layout()->name();
 375                 bool hasLayout = tclass2.hasLayout(name);
 376
 377                 if (hasLayout)
 378                         it->layout(tclass2[name]);
 379                 else
 380                         it->layout(tclass2.defaultLayout());
 381
 382                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 383                         ++ret;
 384                         string const s = bformat(
 385                                 _("Layout had to be changed from\n%1$s to %2$s\n"
 386                                 "because of class conversion from\n%3$s to %4$s"),
 387                          name, it->layout()->name(), tclass1.name(), tclass2.name());
 388                         // To warn the user that something had to be done.
 389                         errorlist.push_back(ErrorItem("Changed Layout", s,
 390                                                       it->id(), 0,
 391                                                       it->size()));
 392                 }
 393         }
 394         return ret;
 395 }
 396
 397
 398 bool CutAndPaste::checkPastePossible()
 399 {
 400         return !cuts.empty() && !cuts[0].first.empty();
 401 }