src/CutAndPaste.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995-2001 The LyX Team.
   7  *
   8  * ====================================================== */
   9
  10 #include <config.h>
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "CutAndPaste.h"
  17 #include "BufferView.h"
  18 #include "buffer.h"
  19 #include "paragraph.h"
  20 #include "ParagraphParameters.h"
  21 #include "lyxtext.h"
  22 #include "lyxcursor.h"
  23 #include "gettext.h"
  24 #include "iterators.h"
  25 #include "lyxtextclasslist.h"
  26 #include "undo_funcs.h"
  27 #include "paragraph_funcs.h"
  28 #include "debug.h"
  29
  30 #include "insets/inseterror.h"
  31
  32 #include "BoostFormat.h"
  33
  34 using std::endl;
  35 using std::pair;
  36 using lyx::pos_type;
  37 using lyx::textclass_type;
  38
  39 extern BufferView * current_view;
  40
  41 // Jürgen, note that this means that you cannot currently have a list
  42 // of selections cut/copied. So IMHO later we should have a
  43 // list/vector/deque that we could store
  44 // struct selection_item {
  45 //       Paragraph * buf;
  46 //       LyXTextClassList::size_type textclass;
  47 // };
  48 // in and some method of choosing beween them (based on the first few chars
  49 // in the selection probably.) This would be a nice feature and quite
  50 // easy to implement. (Lgb)
  51 //
  52 // Sure but I just cleaned up this code for now with the same functionality
  53 // as before. I also want to add a XClipboard function so that we can copy
  54 // text from LyX to some other X-application in the form of ASCII or in the
  55 // form of LaTeX (or Docbook depending on the document-class!). Think how nice
  56 // it could be to select a math-inset do a "Copy to X-Clipboard as LaTeX" and
  57 // then do a middle mouse button click in the application you want and have
  58 // the whole formula there in LaTeX-Code. (Jug)
  59
  60 namespace {
  61
  62 // FIXME: stupid name
  63 Paragraph * buf = 0;
  64 textclass_type textclass = 0;
  65
  66 // for now here this should be in another Cut&Paste Class!
  67 // Jürgen, I moved this out of CutAndPaste since it does not operate on any
  68 // member of the CutAndPaste class and in addition it was private.
  69 // Perhaps it even should take a parameter? (Lgb)
  70 void DeleteBuffer()
  71 {
  72         if (!buf)
  73                 return;
  74
  75         Paragraph * tmppar;
  76
  77         while (buf) {
  78                 tmppar =  buf;
  79                 buf = buf->next();
  80                 delete tmppar;
  81         }
  82         buf = 0;
  83 }
  84
  85 } // namespace anon
  86
  87
  88 bool CutAndPaste::cutSelection(Paragraph * startpar, Paragraph ** endpar,
  89                                int start, int & end, char tc, bool doclear,
  90                                                            bool realcut)
  91 {
  92         if (!startpar || (start > startpar->size()))
  93                 return false;
  94
  95         if (realcut) {
  96                 copySelection(startpar, *endpar, start, end, tc);
  97         }
  98
  99         if (!endpar || startpar == *endpar) {
 100                 if (startpar->erase(start, end)) {
 101                         // Some chars were erased, go to start to be safe
 102                         end = start;
 103                 }
 104                 return true;
 105         }
 106
 107         bool actually_erased = false;
 108
 109         // clear end/begin fragments of the first/last par in selection
 110         actually_erased |= (startpar)->erase(start, startpar->size());
 111         if ((*endpar)->erase(0, end)) {
 112                 actually_erased = true;
 113                 end = 0;
 114         }
 115
 116         // Loop through the deleted pars if any, erasing as needed
 117
 118         Paragraph * pit = startpar->next();
 119
 120         while (1) {
 121                 // *endpar can be 0
 122                 if (!pit)
 123                         break;
 124
 125                 Paragraph * next = pit->next();
 126
 127                 // "erase" the contents of the par
 128                 if (pit != *endpar) {
 129                         actually_erased |= pit->erase(0, pit->size());
 130
 131                         // remove the par if it's now empty
 132                         if (actually_erased) {
 133                                 pit->previous()->next(pit->next());
 134                                 if (next) {
 135                                         next->previous(pit->previous());
 136                                 }
 137                                 lyxerr << "deleting pit " << pit << endl;
 138
 139                                 delete pit;
 140                         }
 141                 }
 142
 143                 if (pit == *endpar)
 144                         break;
 145
 146                 pit = next;
 147         }
 148
 149 #if 0 // FIXME: why for cut but not copy ?
 150         // the cut selection should begin with standard layout
 151         if (realcut) {
 152                 buf->params().clear();
 153                 buf->bibkey = 0;
 154                 buf->layout(textclasslist[buffer->params.textclass].defaultLayoutName());
 155         }
 156 #endif
 157
 158         if (!startpar->next())
 159                 return true;
 160
 161         Buffer * buffer = current_view->buffer();
 162
 163         if (doclear) {
 164                 startpar->next()->stripLeadingSpaces();
 165         }
 166
 167         if (!actually_erased)
 168                 return true;
 169
 170         // paste the paragraphs again, if possible
 171         if (startpar->hasSameLayout(startpar->next()) ||
 172             startpar->next()->empty()) {
 173                 mergeParagraph(buffer->params, startpar);
 174                 // this because endpar gets deleted here!
 175                 (*endpar) = startpar;
 176         }
 177
 178         return true;
 179 }
 180
 181
 182 bool CutAndPaste::copySelection(Paragraph * startpar, Paragraph * endpar,
 183                                 int start, int end, char tc)
 184 {
 185         if (!startpar || (start > startpar->size()))
 186                 return false;
 187
 188         DeleteBuffer();
 189
 190         textclass = tc;
 191
 192         if (!endpar || startpar == endpar) {
 193                 // only within one paragraph
 194                 buf = new Paragraph;
 195                 buf->layout(startpar->layout());
 196                 pos_type i = start;
 197                 if (end > startpar->size())
 198                         end = startpar->size();
 199                 for (; i < end; ++i) {
 200                         startpar->copyIntoMinibuffer(*current_view->buffer(), i);
 201                         buf->insertFromMinibuffer(buf->size());
 202                 }
 203         } else {
 204                 // copy more than one paragraph
 205                 // clone the paragraphs within the selection
 206                 Paragraph * tmppar = startpar;
 207                 buf = new Paragraph(*tmppar, false);
 208                 Paragraph * tmppar2 = buf;
 209                 tmppar2->cleanChanges();
 210
 211                 while (tmppar != endpar
 212                        && tmppar->next()) {
 213                         tmppar = tmppar->next();
 214                         tmppar2->next(new Paragraph(*tmppar, false));
 215                         tmppar2->next()->previous(tmppar2);
 216                         tmppar2 = tmppar2->next();
 217                         // reset change info
 218                         tmppar2->cleanChanges();
 219                 }
 220                 tmppar2->next(0);
 221
 222                 // the buf paragraph is too big
 223                 pos_type tmpi2 = start;
 224                 for (; tmpi2; --tmpi2)
 225                         buf->erase(0);
 226
 227                 // now tmppar 2 is too big, delete all after end
 228                 tmpi2 = end;
 229                 while (tmppar2->size() > tmpi2) {
 230                         tmppar2->erase(tmppar2->size() - 1);
 231                 }
 232                 // this paragraph's are of noone's owner!
 233                 tmppar = buf;
 234                 while (tmppar) {
 235                         tmppar->setInsetOwner(0);
 236                         tmppar = tmppar->next();
 237                 }
 238         }
 239         return true;
 240 }
 241
 242
 243 bool CutAndPaste::pasteSelection(Paragraph ** par, Paragraph ** endpar,
 244                                  int & pos, char tc)
 245 {
 246         if (!checkPastePossible(*par))
 247                 return false;
 248
 249         if (pos > (*par)->size())
 250                 pos = (*par)->size();
 251
 252 #if 0
 253         // Paragraph * tmpbuf;
 254         Paragraph * tmppar = *par;
 255         int tmppos = pos;
 256
 257         // There are two cases: cutbuffer only one paragraph or many
 258         if (!buf->next()) {
 259                 // only within a paragraph
 260                 Paragraph * tmpbuf = new Paragraph(*buf, false);
 261
 262                 // Some provisions should be done here for checking
 263                 // if we are inserting at the beginning of a
 264                 // paragraph. If there are a space at the beginning
 265                 // of the text to insert and we are inserting at
 266                 // the beginning of the paragraph the space should
 267                 // be removed.
 268                 while (buf->size()) {
 269                         // This is an attempt to fix the
 270                         // "never insert a space at the
 271                         // beginning of a paragraph" problem.
 272                         if (!tmppos && buf->isLineSeparator(0)) {
 273                                 buf->erase(0);
 274                         } else {
 275                                 buf->cutIntoMinibuffer(current_view->buffer()->params, 0);
 276                                 buf->erase(0);
 277                                 if (tmppar->insertFromMinibuffer(tmppos))
 278                                         ++tmppos;
 279                         }
 280                 }
 281                 delete buf;
 282                 buf = tmpbuf;
 283                 *endpar = tmppar->next();
 284                 pos = tmppos;
 285         } else
 286 #endif
 287         {
 288                 // many paragraphs
 289
 290                 // make a copy of the simple cut_buffer
 291                 Paragraph * tmpbuf = buf;
 292                 Paragraph * simple_cut_clone = new Paragraph(*tmpbuf, false);
 293                 Paragraph * tmpbuf2 = simple_cut_clone;
 294
 295                 while (tmpbuf->next()) {
 296                         tmpbuf = tmpbuf->next();
 297                         tmpbuf2->next(new Paragraph(*tmpbuf, false));
 298                         tmpbuf2->next()->previous(tmpbuf2);
 299                         tmpbuf2 = tmpbuf2->next();
 300                 }
 301
 302                 // now remove all out of the buffer which is NOT allowed in the
 303                 // new environment and set also another font if that is required
 304                 tmpbuf = buf;
 305                 int depth_delta = (*par)->params().depth() - tmpbuf->params().depth();
 306                 // temporary set *par as previous of tmpbuf as we might have to realize
 307                 // the font.
 308                 tmpbuf->previous(*par);
 309
 310                 // make sure there is no class difference
 311                 SwitchLayoutsBetweenClasses(textclass, tc, tmpbuf,
 312                                             current_view->buffer()->params);
 313
 314                 Paragraph::depth_type max_depth = (*par)->getMaxDepthAfter();
 315
 316                 while(tmpbuf) {
 317                         // if we have a negative jump so that the depth would go below
 318                         // 0 depth then we have to redo the delta to this new max depth
 319                         // level so that subsequent paragraphs are aligned correctly to
 320                         // this paragraph at level 0.
 321                         if ((static_cast<int>(tmpbuf->params().depth()) + depth_delta) < 0)
 322                                 depth_delta = 0;
 323                         // set the right depth so that we are not too deep or shallow.
 324                         tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 325                         if (tmpbuf->params().depth() > max_depth)
 326                                 tmpbuf->params().depth(max_depth);
 327                         // only set this from the 2nd on as the 2nd depends for maxDepth
 328                         // still on *par
 329                         if (tmpbuf->previous() != (*par))
 330                                 max_depth = tmpbuf->getMaxDepthAfter();
 331                         // set the inset owner of this paragraph
 332                         tmpbuf->setInsetOwner((*par)->inInset());
 333                         for(pos_type i = 0; i < tmpbuf->size(); ++i) {
 334                                 if (tmpbuf->getChar(i) == Paragraph::META_INSET) {
 335                                         if (!(*par)->insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 336                                         {
 337                                                 tmpbuf->erase(i--);
 338                                         }
 339                                 } else {
 340                                         LyXFont f1 = tmpbuf->getFont(current_view->buffer()->params,i);
 341                                         LyXFont f2 = f1;
 342                                         if (!(*par)->checkInsertChar(f1)) {
 343                                                 tmpbuf->erase(i--);
 344                                         } else if (f1 != f2) {
 345                                                 tmpbuf->setFont(i, f1);
 346                                         }
 347                                 }
 348                         }
 349                         tmpbuf = tmpbuf->next();
 350                 }
 351                 // now reset it to 0
 352                 buf->previous(0);
 353
 354                 // make the buf exactly the same layout than
 355                 // the cursor paragraph
 356                 buf->makeSameLayout(*par);
 357
 358                 // find the end of the buffer
 359                 Paragraph * lastbuffer = buf;
 360                 while (lastbuffer->next())
 361                         lastbuffer = lastbuffer->next();
 362
 363                 bool paste_the_end = false;
 364
 365                 // open the paragraph for inserting the buf
 366                 // if necessary
 367                 if (((*par)->size() > pos) || !(*par)->next()) {
 368                         breakParagraphConservative(
 369                                 current_view->buffer()->params, *par, pos);
 370                         paste_the_end = true;
 371                 }
 372                 // set the end for redoing later
 373                 *endpar = (*par)->next()->next();
 374
 375                 // paste it!
 376                 lastbuffer->next((*par)->next());
 377                 (*par)->next()->previous(lastbuffer);
 378
 379                 (*par)->next(buf);
 380                 buf->previous(*par);
 381
 382                 if ((*par)->next() == lastbuffer)
 383                         lastbuffer = *par;
 384
 385                 mergeParagraph(current_view->buffer()->params, *par);
 386                 // store the new cursor position
 387                 *par = lastbuffer;
 388                 pos = lastbuffer->size();
 389                 // maybe some pasting
 390                 if (lastbuffer->next() && paste_the_end) {
 391                         if (lastbuffer->next()->hasSameLayout(lastbuffer)) {
 392                                 mergeParagraph(current_view->buffer()->params, lastbuffer);
 393                         } else if (!lastbuffer->next()->size()) {
 394                                 lastbuffer->next()->makeSameLayout(lastbuffer);
 395                                 mergeParagraph(current_view->buffer()->params, lastbuffer);
 396                         } else if (!lastbuffer->size()) {
 397                                 lastbuffer->makeSameLayout(lastbuffer->next());
 398                                 mergeParagraph(current_view->buffer()->params, lastbuffer);
 399                         } else
 400                                 lastbuffer->next()->stripLeadingSpaces();
 401                 }
 402                 // restore the simple cut buffer
 403                 buf = simple_cut_clone;
 404         }
 405
 406         return true;
 407 }
 408
 409
 410 int CutAndPaste::nrOfParagraphs()
 411 {
 412         if (!buf)
 413                 return 0;
 414
 415         int n = 1;
 416         Paragraph * tmppar = buf;
 417         while (tmppar->next()) {
 418                 ++n;
 419                 tmppar = tmppar->next();
 420         }
 421         return n;
 422 }
 423
 424
 425 int CutAndPaste::SwitchLayoutsBetweenClasses(textclass_type c1,
 426                                              textclass_type c2,
 427                                              Paragraph * par,
 428                                              BufferParams const & /*bparams*/)
 429 {
 430         int ret = 0;
 431         if (!par || c1 == c2)
 432                 return ret;
 433
 434         LyXTextClass const & tclass1 = textclasslist[c1];
 435         LyXTextClass const & tclass2 = textclasslist[c2];
 436         ParIterator end = ParIterator();
 437         for (ParIterator it = ParIterator(par); it != end; ++it) {
 438                 par = *it;
 439                 string const name = par->layout()->name();
 440                 bool hasLayout = tclass2.hasLayout(name);
 441
 442                 if (hasLayout)
 443                         par->layout(tclass2[name]);
 444                 else
 445                         par->layout(tclass2.defaultLayout());
 446
 447                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 448                         ++ret;
 449 #if USE_BOOST_FORMAT
 450                         boost::format fmt(_("Layout had to be changed from\n"
 451                                             "%1$s to %2$s\n"
 452                                             "because of class conversion from\n"
 453                                             "%3$s to %4$s"));
 454                         fmt     % name
 455                                 % par->layout()->name()
 456                                 % tclass1.name()
 457                                 % tclass2.name();
 458
 459                         string const s = fmt.str();
 460 #else
 461                         string const s = _("Layout had to be changed from\n")
 462                                 + name + _(" to ")
 463                                 + par->layout()->name()
 464                                 + _("\nbecause of class conversion from\n")
 465                                 + tclass1.name() + _(" to ")
 466                                 + tclass2.name();
 467 #endif
 468                         freezeUndo();
 469                         InsetError * new_inset = new InsetError(s);
 470                         LyXText * txt = current_view->getLyXText();
 471                         LyXCursor cur = txt->cursor;
 472                         txt->setCursorIntern(current_view, par, 0);
 473                         txt->insertInset(current_view, new_inset);
 474                         txt->fullRebreak(current_view);
 475                         txt->setCursorIntern(current_view, cur.par(), cur.pos());
 476                         unFreezeUndo();
 477                 }
 478         }
 479         return ret;
 480 }
 481
 482
 483 bool CutAndPaste::checkPastePossible(Paragraph *)
 484 {
 485         if (!buf) return false;
 486
 487         return true;
 488 }