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