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