src/CutAndPaste.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995-2000 The LyX Team.
   7  *
   8  * ====================================================== */
   9
  10 #include <config.h>
  11
  12 #include "CutAndPaste.h"
  13 #include "BufferView.h"
  14 #include "buffer.h"
  15 #include "lyxparagraph.h"
  16 #include "insets/inseterror.h"
  17 #include "lyx_gui_misc.h"
  18 #include "lyxcursor.h"
  19 #include "gettext.h"
  20
  21 #ifdef __GNUG__
  22 #pragma implementation
  23 #endif
  24
  25 using std::pair;
  26
  27 extern BufferView * current_view;
  28
  29 // Jürgen, note that this means that you cannot currently have a list
  30 // of selections cut/copied. So IMHO later we should have a
  31 // list/vector/deque that we could store
  32 // struct selection_item {
  33 //       LyXParagraph * buf;
  34 //       LyXTextClassList::size_type textclass;
  35 // };
  36 // in and some method of choosing beween them (based on the first few chars
  37 // in the selection probably.) This would be a nice feature and quite
  38 // easy to implement. (Lgb)
  39 //
  40 // Sure but I just cleaned up this code for now with the same functionality
  41 // as before. I also want to add a XClipboard function so that we can copy
  42 // text from LyX to some other X-application in the form of ASCII or in the
  43 // form of LaTeX (or Docbook depending on the document-class!). Think how nice
  44 // it could be to select a math-inset do a "Copy to X-Clipboard as LaTeX" and
  45 // then do a middle mouse button click in the application you want and have
  46 // the whole formula there in LaTeX-Code. (Jug)
  47
  48 namespace {
  49
  50 LyXParagraph * buf = 0;
  51 LyXTextClassList::size_type textclass = 0;
  52
  53 // for now here this should be in another Cut&Paste Class!
  54 // Jürgen, I moved this out of CutAndPaste since it does not operate on any
  55 // member of the CutAndPaste class and in addition it was private.
  56 // Perhaps it even should take a parameter? (Lgb)
  57 void DeleteBuffer()
  58 {
  59     if (!buf)
  60                 return;
  61
  62     LyXParagraph * tmppar;
  63
  64     while (buf) {
  65                 tmppar =  buf;
  66 #ifndef NEW_INSETS
  67                 buf = buf->next_;
  68 #else
  69                 buf = buf->next();
  70 #endif
  71                 delete tmppar;
  72     }
  73     buf = 0;
  74 }
  75
  76 } // namespace anon
  77
  78 bool CutAndPaste::cutSelection(LyXParagraph * startpar, LyXParagraph ** endpar,
  79                                int start, int & end, char tc, bool doclear)
  80 {
  81 #ifndef NEW_INSETS
  82     if (!startpar || (start > startpar->Last()))
  83                 return false;
  84 #else
  85     if (!startpar || (start > startpar->size()))
  86                 return false;
  87 #endif
  88
  89     DeleteBuffer();
  90
  91     textclass = tc;
  92
  93     if (!(*endpar) ||
  94 #ifndef NEW_INSETS
  95                 (startpar->ParFromPos(start) ==
  96                  (*endpar)->ParFromPos(end))
  97 #else
  98                 (startpar == (*endpar))
  99 #endif
 100                 ) {
 101                 // only within one paragraph
 102                 buf = new LyXParagraph;
 103                 LyXParagraph::size_type i = start;
 104 #ifndef NEW_INSETS
 105                 if (end > startpar->Last())
 106                         end = startpar->Last();
 107 #else
 108                 if (end > startpar->size())
 109                         end = startpar->size();
 110 #endif
 111                 for (; i < end; ++i) {
 112                         startpar->CopyIntoMinibuffer(*current_view->buffer(), start);
 113                         startpar->Erase(start);
 114
 115 #ifndef NEW_INSETS
 116                         buf->InsertFromMinibuffer(buf->Last());
 117 #else
 118                         buf->InsertFromMinibuffer(buf->size());
 119 #endif
 120                 }
 121                 end = start-1;
 122     } else {
 123                 // more than one paragraph
 124                 (*endpar)->BreakParagraphConservative(current_view->buffer()->params,
 125                                                                                           end);
 126                 *endpar = (*endpar)->next();
 127                 end = 0;
 128
 129                 startpar->BreakParagraphConservative(current_view->buffer()->params,
 130                                                                                          start);
 131
 132                 // store the selection
 133 #ifndef NEW_INSETS
 134                 buf = startpar->ParFromPos(start)->next_;
 135 #else
 136                 buf = startpar->next();
 137 #endif
 138                 buf->previous(0);
 139                 (*endpar)->previous()->next(0);
 140
 141                 // cut the selection
 142 #ifndef NEW_INSETS
 143                 startpar->ParFromPos(start)->next(*endpar);
 144
 145                 (*endpar)->previous(startpar->ParFromPos(start));
 146 #else
 147                 startpar->next(*endpar);
 148
 149                 (*endpar)->previous(startpar);
 150 #endif
 151
 152 #ifndef NEW_INSETS
 153                 // care about footnotes
 154                 if (buf->footnoteflag) {
 155                         LyXParagraph * tmppar = buf;
 156                         while (tmppar){
 157                                 tmppar->footnoteflag = LyXParagraph::NO_FOOTNOTE;
 158                                 tmppar = tmppar->next_;
 159                         }
 160                 }
 161 #endif
 162
 163                 // the cut selection should begin with standard layout
 164                 buf->Clear();
 165
 166                 // paste the paragraphs again, if possible
 167                 if (doclear)
 168                         startpar->next()->StripLeadingSpaces(textclass);
 169 #ifndef NEW_INSETS
 170                 if (startpar->FirstPhysicalPar()->HasSameLayout(startpar->next()) ||
 171                         !startpar->next()->Last())
 172 #else
 173                 if (startpar->HasSameLayout(startpar->next()) ||
 174                         !startpar->next()->size())
 175 #endif
 176                 {
 177 #ifndef NEW_INSETS
 178                         startpar->ParFromPos(start)->PasteParagraph(current_view->buffer()->params);
 179 #else
 180                         startpar->PasteParagraph(current_view->buffer()->params);
 181 #endif
 182                         (*endpar) = startpar; // this because endpar gets deleted here!
 183                 }
 184         }
 185         return true;
 186 }
 187
 188
 189 bool CutAndPaste::copySelection(LyXParagraph * startpar, LyXParagraph * endpar,
 190                                 int start, int end, char tc)
 191 {
 192 #ifndef NEW_INSETS
 193     if (!startpar || (start > startpar->Last()))
 194                 return false;
 195 #else
 196     if (!startpar || (start > startpar->size()))
 197                 return false;
 198 #endif
 199
 200     DeleteBuffer();
 201
 202     textclass = tc;
 203
 204     if (!(endpar) ||
 205 #ifndef NEW_INSETS
 206                 (startpar->ParFromPos(start) ==
 207                  (endpar)->ParFromPos(end))
 208 #else
 209                 (startpar == endpar)
 210 #endif
 211                 ) {
 212                 // only within one paragraph
 213                 buf = new LyXParagraph;
 214                 LyXParagraph::size_type i = start;
 215 #ifndef NEW_INSETS
 216                 if (end > startpar->Last())
 217                         end = startpar->Last();
 218 #else
 219                 if (end > startpar->size())
 220                         end = startpar->size();
 221 #endif
 222                 for (; i < end; ++i) {
 223                         startpar->CopyIntoMinibuffer(*current_view->buffer(), i);
 224 #ifndef NEW_INSETS
 225                         buf->InsertFromMinibuffer(buf->Last());
 226 #else
 227                         buf->InsertFromMinibuffer(buf->size());
 228 #endif
 229                 }
 230     } else {
 231                 // copy more than one paragraph
 232                 // clone the paragraphs within the selection
 233 #ifndef NEW_INSETS
 234                 LyXParagraph * tmppar = startpar->ParFromPos(start);
 235 #else
 236                 LyXParagraph * tmppar = startpar;
 237 #endif
 238                 buf = tmppar->Clone();
 239                 LyXParagraph * tmppar2 = buf;
 240
 241 #ifndef NEW_INSETS
 242                 while (tmppar != endpar->ParFromPos(end)
 243                            && tmppar->next_) {
 244                         tmppar = tmppar->next_;
 245                         tmppar2->next(tmppar->Clone());
 246                         tmppar2->next_->previous(tmppar2);
 247                         tmppar2 = tmppar2->next_;
 248                 }
 249                 tmppar2->next(0);
 250 #else
 251                 while (tmppar != endpar
 252                            && tmppar->next()) {
 253                         tmppar = tmppar->next();
 254                         tmppar2->next(tmppar->Clone());
 255                         tmppar2->next()->previous(tmppar2);
 256                         tmppar2 = tmppar2->next();
 257                 }
 258                 tmppar2->next(0);
 259 #endif
 260
 261 #ifndef NEW_INSETS
 262                 // care about footnotes
 263                 if (buf->footnoteflag) {
 264                         tmppar = buf;
 265                         while (tmppar) {
 266                                 tmppar->footnoteflag = LyXParagraph::NO_FOOTNOTE;
 267                                 tmppar = tmppar->next_;
 268                         }
 269                 }
 270 #endif
 271
 272                 // the buf paragraph is too big
 273 #ifndef NEW_INSETS
 274                 LyXParagraph::size_type tmpi2 = startpar->PositionInParFromPos(start);
 275 #else
 276                 LyXParagraph::size_type tmpi2 = start;
 277 #endif
 278                 for (; tmpi2; --tmpi2)
 279                         buf->Erase(0);
 280
 281                 // now tmppar 2 is too big, delete all after end
 282 #ifndef NEW_INSETS
 283                 tmpi2 = endpar->PositionInParFromPos(end);
 284 #else
 285                 tmpi2 = end;
 286 #endif
 287                 while (tmppar2->size() > tmpi2) {
 288                         tmppar2->Erase(tmppar2->size() - 1);
 289                 }
 290     }
 291     return true;
 292 }
 293
 294
 295 bool CutAndPaste::pasteSelection(LyXParagraph ** par, LyXParagraph ** endpar,
 296                                  int & pos, char tc)
 297 {
 298     if (!checkPastePossible(*par))
 299                 return false;
 300
 301 #ifndef NEW_INSETS
 302     if (pos > (*par)->Last())
 303                 pos = (*par)->Last();
 304 #else
 305     if (pos > (*par)->size())
 306                 pos = (*par)->size();
 307 #endif
 308
 309     LyXParagraph * tmpbuf;
 310     LyXParagraph * tmppar = *par;
 311     int tmppos = pos;
 312
 313     // There are two cases: cutbuffer only one paragraph or many
 314 #ifndef NEW_INSETS
 315     if (!buf->next_) {
 316 #else
 317                 if (!buf->next()) {
 318 #endif
 319                         // only within a paragraph
 320                         tmpbuf = buf->Clone();
 321                         // Some provisions should be done here for checking
 322                         // if we are inserting at the beginning of a
 323                         // paragraph. If there are a space at the beginning
 324                         // of the text to insert and we are inserting at
 325                         // the beginning of the paragraph the space should
 326                         // be removed.
 327                         while (buf->size()) {
 328                                 // This is an attempt to fix the
 329                                 // "never insert a space at the
 330                                 // beginning of a paragraph" problem.
 331                                 if (!tmppos && buf->IsLineSeparator(0)) {
 332                                         buf->Erase(0);
 333                                 } else {
 334                                         buf->CutIntoMinibuffer(current_view->buffer()->params, 0);
 335                                         buf->Erase(0);
 336                                         if (tmppar->InsertFromMinibuffer(tmppos))
 337                                                 ++tmppos;
 338                                 }
 339                         }
 340                         delete buf;
 341                         buf = tmpbuf;
 342                         *endpar = tmppar->next();
 343                         pos = tmppos;
 344                 } else {
 345                         // many paragraphs
 346
 347                         // make a copy of the simple cut_buffer
 348                         tmpbuf = buf;
 349                         LyXParagraph * simple_cut_clone = tmpbuf->Clone();
 350                         LyXParagraph * tmpbuf2 = simple_cut_clone;
 351 #ifndef NEW_INSETS
 352                         if ((*par)->footnoteflag) {
 353                                 tmpbuf->footnoteflag = (*par)->footnoteflag;
 354                                 tmpbuf->footnotekind = (*par)->footnotekind;
 355                         }
 356                         while (tmpbuf->next_) {
 357                                 tmpbuf = tmpbuf->next_;
 358                                 tmpbuf2->next(tmpbuf->Clone());
 359                                 tmpbuf2->next_->previous(tmpbuf2);
 360                                 tmpbuf2 = tmpbuf2->next_;
 361                                 if ((*par)->footnoteflag){
 362                                         tmpbuf->footnoteflag = (*par)->footnoteflag;
 363                                         tmpbuf->footnotekind = (*par)->footnotekind;
 364                                 }
 365                         }
 366 #else
 367                         while (tmpbuf->next()) {
 368                                 tmpbuf = tmpbuf->next();
 369                                 tmpbuf2->next(tmpbuf->Clone());
 370                                 tmpbuf2->next()->previous(tmpbuf2);
 371                                 tmpbuf2 = tmpbuf2->next();
 372                         }
 373 #endif
 374
 375                         // make sure there is no class difference
 376                         SwitchLayoutsBetweenClasses(textclass, tc, buf);
 377
 378                         // make the buf exactly the same layout than
 379                         // the cursor paragraph
 380                         buf->MakeSameLayout(*par);
 381
 382                         // find the end of the buffer
 383                         LyXParagraph * lastbuffer = buf;
 384                         while (lastbuffer->next())
 385                                 lastbuffer = lastbuffer->next();
 386
 387                         bool paste_the_end = false;
 388
 389 #ifndef NEW_INSETS
 390                         // open the paragraph for inserting the buf
 391                         // if necessary
 392                         if (((*par)->Last() > pos) || !(*par)->next()) {
 393                                 (*par)->BreakParagraphConservative(current_view->buffer()->params,
 394                                                                                                    pos);
 395                                 paste_the_end = true;
 396                         }
 397                         // set the end for redoing later
 398                         *endpar = (*par)->ParFromPos(pos)->next_->next();
 399
 400                         // paste it!
 401                         lastbuffer->ParFromPos(lastbuffer->Last())->next(
 402                                 (*par)->ParFromPos(pos)->next_);
 403                         (*par)->ParFromPos(pos)->next()->previous(
 404                                 lastbuffer->ParFromPos(lastbuffer->Last()));
 405
 406                         (*par)->ParFromPos(pos)->next(buf);
 407                         buf->previous((*par)->ParFromPos(pos));
 408
 409                         if ((*par)->ParFromPos(pos)->next() == lastbuffer)
 410                                 lastbuffer = *par;
 411
 412                         (*par)->ParFromPos(pos)->PasteParagraph(current_view->buffer()->params);
 413                         // store the new cursor position
 414                         *par = lastbuffer;
 415                         pos = lastbuffer->Last();
 416                         // maybe some pasting
 417                         if (lastbuffer->next() && paste_the_end) {
 418                                 if (lastbuffer->next()->HasSameLayout(lastbuffer)) {
 419                                         lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 420                                 } else if (!lastbuffer->next()->Last()) {
 421                                         lastbuffer->next()->MakeSameLayout(lastbuffer);
 422                                         lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 423                                 } else if (!lastbuffer->Last()) {
 424                                         lastbuffer->MakeSameLayout(lastbuffer->next_);
 425                                         lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 426                                 } else
 427                                         lastbuffer->next()->StripLeadingSpaces(tc);
 428                         }
 429                         // restore the simple cut buffer
 430                         buf = simple_cut_clone;
 431                 }
 432 #else
 433                 // open the paragraph for inserting the buf
 434                 // if necessary
 435                 if (((*par)->size() > pos) || !(*par)->next()) {
 436                         (*par)->BreakParagraphConservative(current_view->buffer()->params,
 437                                                                                            pos);
 438                         paste_the_end = true;
 439                 }
 440                 // set the end for redoing later
 441                 *endpar = (*par)->next()->next();
 442
 443                 // paste it!
 444                 lastbuffer->next((*par)->next());
 445                 (*par)->next()->previous(lastbuffer);
 446
 447                 (*par)->next(buf);
 448                 buf->previous(*par);
 449
 450                 if ((*par)->next() == lastbuffer)
 451                         lastbuffer = *par;
 452
 453                 (*par)->PasteParagraph(current_view->buffer()->params);
 454                 // store the new cursor position
 455                 *par = lastbuffer;
 456                 pos = lastbuffer->size();
 457                 // maybe some pasting
 458                 if (lastbuffer->next() && paste_the_end) {
 459                         if (lastbuffer->next()->HasSameLayout(lastbuffer)) {
 460                                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 461                         } else if (!lastbuffer->next()->size()) {
 462                                 lastbuffer->next()->MakeSameLayout(lastbuffer);
 463                                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 464                         } else if (!lastbuffer->size()) {
 465                                 lastbuffer->MakeSameLayout(lastbuffer->next());
 466                                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 467                         } else
 468                                 lastbuffer->next()->StripLeadingSpaces(tc);
 469                 }
 470                 // restore the simple cut buffer
 471                 buf = simple_cut_clone;
 472     }
 473 #endif
 474
 475     return true;
 476 }
 477
 478
 479 int CutAndPaste::nrOfParagraphs()
 480 {
 481         if (!buf)
 482                 return 0;
 483
 484         int n = 1;
 485         LyXParagraph * tmppar = buf;
 486 #ifndef NEW_INSETS
 487         while(tmppar->next_) {
 488                 ++n;
 489                 tmppar = tmppar->next_;
 490         }
 491 #else
 492         while(tmppar->next()) {
 493                 ++n;
 494                 tmppar = tmppar->next();
 495         }
 496 #endif
 497         return n;
 498 }
 499
 500
 501 int CutAndPaste::SwitchLayoutsBetweenClasses(LyXTextClassList::size_type c1,
 502                                              LyXTextClassList::size_type c2,
 503                                              LyXParagraph * par)
 504 {
 505     int ret = 0;
 506     if (!par || c1 == c2)
 507                 return ret;
 508 #ifndef NEW_INSETS
 509     par = par->FirstPhysicalPar();
 510 #endif
 511     while (par) {
 512                 string name = textclasslist.NameOfLayout(c1, par->layout);
 513                 int lay = 0;
 514                 pair<bool, LyXTextClass::LayoutList::size_type> pp =
 515                         textclasslist.NumberOfLayout(c2, name);
 516                 if (pp.first) {
 517                         lay = pp.second;
 518                 } else { // layout not found
 519                         // use default layout "Standard" (0)
 520                         lay = 0;
 521                 }
 522                 par->layout = lay;
 523
 524                 if (name != textclasslist.NameOfLayout(c2, par->layout)) {
 525                         ++ret;
 526                         string s = _("Layout had to be changed from\n")
 527                                 + name + _(" to ")
 528                                 + textclasslist.NameOfLayout(c2, par->layout)
 529                                 + _("\nbecause of class conversion from\n")
 530                                 + textclasslist.NameOfClass(c1) + _(" to ")
 531                                 + textclasslist.NameOfClass(c2);
 532                         InsetError * new_inset = new InsetError(s);
 533                         par->InsertInset(0, new_inset);
 534                 }
 535 #ifndef NEW_INSETS
 536                 par = par->next_;
 537 #else
 538                 par = par->next();
 539 #endif
 540     }
 541     return ret;
 542 }
 543
 544
 545 #ifndef NEW_INSETS
 546 bool CutAndPaste::checkPastePossible(LyXParagraph * par)
 547 #else
 548 bool CutAndPaste::checkPastePossible(LyXParagraph *)
 549 #endif
 550 {
 551     if (!buf) return false;
 552
 553 #ifndef NEW_INSETS
 554     // be carefull with footnotes in footnotes
 555     if (par->footnoteflag != LyXParagraph::NO_FOOTNOTE) {
 556                 // check whether the cut_buffer includes a footnote
 557                 LyXParagraph * tmppar = buf;
 558                 while (tmppar && tmppar->footnoteflag == LyXParagraph::NO_FOOTNOTE)
 559                         tmppar = tmppar->next_;
 560
 561                 if (tmppar) {
 562                         WriteAlert(_("Impossible operation"),
 563                                            _("Can't paste float into float!"),
 564                                            _("Sorry."));
 565                         return false;
 566                 }
 567     }
 568 #endif
 569     return true;
 570 }