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