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