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     if (!startpar || (start > startpar->Last()))
  79         return false;
  80
  81     DeleteBuffer();
  82
  83     textclass = tc;
  84
  85     if (!(*endpar) ||
  86 #ifndef NEW_INSETS
  87         (startpar->ParFromPos(start) ==
  88          (*endpar)->ParFromPos(end))
  89 #else
  90         (startpar == (*endpar))
  91 #endif
  92            ) {
  93         // only within one paragraph
  94         buf = new LyXParagraph;
  95         LyXParagraph::size_type i = start;
  96         if (end > startpar->Last())
  97             end = startpar->Last();
  98         for (; i < end; ++i) {
  99             startpar->CopyIntoMinibuffer(*current_view->buffer(), start);
 100             startpar->Erase(start);
 101
 102             buf->InsertFromMinibuffer(buf->Last());
 103         }
 104         end = start-1;
 105     } else {
 106         // more than one paragraph
 107         (*endpar)->BreakParagraphConservative(current_view->buffer()->params,
 108                                               end);
 109         *endpar = (*endpar)->next();
 110         end = 0;
 111
 112         startpar->BreakParagraphConservative(current_view->buffer()->params,
 113                                              start);
 114
 115         // store the selection
 116 #ifndef NEW_INSETS
 117         buf = startpar->ParFromPos(start)->next_;
 118 #else
 119         buf = startpar->next();
 120 #endif
 121         buf->previous(0);
 122         (*endpar)->previous()->next(0);
 123
 124         // cut the selection
 125 #ifndef NEW_INSETS
 126         startpar->ParFromPos(start)->next(*endpar);
 127
 128         (*endpar)->previous(startpar->ParFromPos(start));
 129 #else
 130         startpar->next(*endpar);
 131
 132         (*endpar)->previous(startpar);
 133 #endif
 134
 135 #ifndef NEW_INSETS
 136         // care about footnotes
 137         if (buf->footnoteflag) {
 138             LyXParagraph * tmppar = buf;
 139             while (tmppar){
 140                 tmppar->footnoteflag = LyXParagraph::NO_FOOTNOTE;
 141                 tmppar = tmppar->next_;
 142             }
 143         }
 144 #endif
 145
 146         // the cut selection should begin with standard layout
 147         buf->Clear();
 148
 149         // paste the paragraphs again, if possible
 150         if (doclear)
 151             startpar->next()->StripLeadingSpaces(textclass);
 152 #ifndef NEW_INSETS
 153         if (startpar->FirstPhysicalPar()->HasSameLayout(startpar->next()) ||
 154 #else
 155         if (startpar->HasSameLayout(startpar->next()) ||
 156 #endif
 157             !startpar->next()->Last()) {
 158 #ifndef NEW_INSETS
 159             startpar->ParFromPos(start)->PasteParagraph(current_view->buffer()->params);
 160 #else
 161             startpar->PasteParagraph(current_view->buffer()->params);
 162 #endif
 163             (*endpar) = startpar; // this because endpar gets deleted here!
 164         }
 165     }
 166     return true;
 167 }
 168
 169
 170 bool CutAndPaste::copySelection(LyXParagraph * startpar, LyXParagraph * endpar,
 171                                 int start, int end, char tc)
 172 {
 173     if (!startpar || (start > startpar->Last()))
 174         return false;
 175
 176     DeleteBuffer();
 177
 178     textclass = tc;
 179
 180     if (!(endpar) ||
 181 #ifndef NEW_INSETS
 182         (startpar->ParFromPos(start) ==
 183                        (endpar)->ParFromPos(end))
 184 #else
 185         (startpar == endpar)
 186 #endif
 187            ) {
 188         // only within one paragraph
 189         buf = new LyXParagraph;
 190         LyXParagraph::size_type i = start;
 191         if (end > startpar->Last())
 192             end = startpar->Last();
 193         for (; i < end; ++i) {
 194             startpar->CopyIntoMinibuffer(*current_view->buffer(), i);
 195             buf->InsertFromMinibuffer(buf->Last());
 196         }
 197     } else {
 198         // copy more than one paragraph
 199         // clone the paragraphs within the selection
 200 #ifndef NEW_INSETS
 201         LyXParagraph * tmppar = startpar->ParFromPos(start);
 202 #else
 203         LyXParagraph * tmppar = startpar;
 204 #endif
 205         buf = tmppar->Clone();
 206         LyXParagraph * tmppar2 = buf;
 207
 208 #ifndef NEW_INSETS
 209         while (tmppar != endpar->ParFromPos(end)
 210                && tmppar->next_) {
 211                 tmppar = tmppar->next_;
 212                 tmppar2->next(tmppar->Clone());
 213                 tmppar2->next_->previous(tmppar2);
 214                 tmppar2 = tmppar2->next_;
 215         }
 216         tmppar2->next(0);
 217 #else
 218         while (tmppar != endpar
 219                && tmppar->next()) {
 220                 tmppar = tmppar->next();
 221                 tmppar2->next(tmppar->Clone());
 222                 tmppar2->next()->previous(tmppar2);
 223                 tmppar2 = tmppar2->next();
 224         }
 225         tmppar2->next(0);
 226 #endif
 227
 228 #ifndef NEW_INSETS
 229         // care about footnotes
 230         if (buf->footnoteflag) {
 231             tmppar = buf;
 232             while (tmppar) {
 233                 tmppar->footnoteflag = LyXParagraph::NO_FOOTNOTE;
 234                 tmppar = tmppar->next_;
 235             }
 236         }
 237 #endif
 238
 239         // the buf paragraph is too big
 240 #ifndef NEW_INSETS
 241         LyXParagraph::size_type tmpi2 = startpar->PositionInParFromPos(start);
 242 #else
 243         LyXParagraph::size_type tmpi2 = start;
 244 #endif
 245         for (; tmpi2; --tmpi2)
 246             buf->Erase(0);
 247
 248         // now tmppar 2 is too big, delete all after end
 249 #ifndef NEW_INSETS
 250         tmpi2 = endpar->PositionInParFromPos(end);
 251 #else
 252         tmpi2 = end;
 253 #endif
 254         while (tmppar2->size() > tmpi2) {
 255             tmppar2->Erase(tmppar2->size() - 1);
 256         }
 257     }
 258     return true;
 259 }
 260
 261
 262 bool CutAndPaste::pasteSelection(LyXParagraph ** par, LyXParagraph ** endpar,
 263                                  int & pos, char tc)
 264 {
 265     if (!checkPastePossible(*par, pos))
 266         return false;
 267
 268     if (pos > (*par)->Last())
 269         pos = (*par)->Last();
 270
 271     LyXParagraph * tmpbuf;
 272     LyXParagraph * tmppar = *par;
 273     int tmppos = pos;
 274
 275     // There are two cases: cutbuffer only one paragraph or many
 276 #ifndef NEW_INSETS
 277     if (!buf->next_) {
 278 #else
 279     if (!buf->next()) {
 280 #endif
 281         // only within a paragraph
 282         tmpbuf = buf->Clone();
 283         // Some provisions should be done here for checking
 284         // if we are inserting at the beginning of a
 285         // paragraph. If there are a space at the beginning
 286         // of the text to insert and we are inserting at
 287         // the beginning of the paragraph the space should
 288         // be removed.
 289         while (buf->size()) {
 290                 // This is an attempt to fix the
 291                 // "never insert a space at the
 292                 // beginning of a paragraph" problem.
 293                 if (!tmppos && buf->IsLineSeparator(0)) {
 294                         buf->Erase(0);
 295                 } else {
 296                         buf->CutIntoMinibuffer(current_view->buffer()->params, 0);
 297                         buf->Erase(0);
 298                         if (tmppar->InsertFromMinibuffer(tmppos))
 299                                 ++tmppos;
 300                 }
 301         }
 302         delete buf;
 303         buf = tmpbuf;
 304         *endpar = tmppar->next();
 305         pos = tmppos;
 306     } else {
 307         // many paragraphs
 308
 309         // make a copy of the simple cut_buffer
 310         tmpbuf = buf;
 311         LyXParagraph * simple_cut_clone = tmpbuf->Clone();
 312         LyXParagraph * tmpbuf2 = simple_cut_clone;
 313 #ifndef NEW_INSETS
 314         if ((*par)->footnoteflag) {
 315                 tmpbuf->footnoteflag = (*par)->footnoteflag;
 316                 tmpbuf->footnotekind = (*par)->footnotekind;
 317         }
 318         while (tmpbuf->next_) {
 319                 tmpbuf = tmpbuf->next_;
 320                 tmpbuf2->next(tmpbuf->Clone());
 321                 tmpbuf2->next_->previous(tmpbuf2);
 322                 tmpbuf2 = tmpbuf2->next_;
 323                 if ((*par)->footnoteflag){
 324                         tmpbuf->footnoteflag = (*par)->footnoteflag;
 325                         tmpbuf->footnotekind = (*par)->footnotekind;
 326                 }
 327         }
 328 #else
 329         while (tmpbuf->next()) {
 330                 tmpbuf = tmpbuf->next();
 331                 tmpbuf2->next(tmpbuf->Clone());
 332                 tmpbuf2->next()->previous(tmpbuf2);
 333                 tmpbuf2 = tmpbuf2->next();
 334         }
 335 #endif
 336
 337         // make sure there is no class difference
 338         SwitchLayoutsBetweenClasses(textclass, tc, buf);
 339
 340         // make the buf exactly the same layout than
 341         // the cursor paragraph
 342         buf->MakeSameLayout(*par);
 343
 344         // find the end of the buffer
 345         LyXParagraph * lastbuffer = buf;
 346         while (lastbuffer->next())
 347             lastbuffer = lastbuffer->next();
 348
 349         bool paste_the_end = false;
 350
 351         // open the paragraph for inserting the buf
 352         // if necessary
 353         if (((*par)->Last() > pos) || !(*par)->next()) {
 354             (*par)->BreakParagraphConservative(current_view->buffer()->params,
 355                                                pos);
 356             paste_the_end = true;
 357         }
 358
 359         // set the end for redoing later
 360 #ifndef NEW_INSETS
 361         *endpar = (*par)->ParFromPos(pos)->next_->next();
 362
 363         // paste it!
 364         lastbuffer->ParFromPos(lastbuffer->Last())->next(
 365             (*par)->ParFromPos(pos)->next_);
 366         (*par)->ParFromPos(pos)->next()->previous(
 367             lastbuffer->ParFromPos(lastbuffer->Last()));
 368
 369         (*par)->ParFromPos(pos)->next(buf);
 370         buf->previous((*par)->ParFromPos(pos));
 371
 372         if ((*par)->ParFromPos(pos)->next() == lastbuffer)
 373             lastbuffer = *par;
 374
 375         (*par)->ParFromPos(pos)->PasteParagraph(current_view->buffer()->params);
 376 #else
 377         *endpar = (*par)->next()->next();
 378
 379         // paste it!
 380         lastbuffer->next((*par)->next());
 381         (*par)->next()->previous(lastbuffer);
 382
 383         (*par)->next(buf);
 384         buf->previous(*par);
 385
 386         if ((*par)->next() == lastbuffer)
 387             lastbuffer = *par;
 388
 389         (*par)->PasteParagraph(current_view->buffer()->params);
 390 #endif
 391         // store the new cursor position
 392         *par = lastbuffer;
 393         pos = lastbuffer->Last();
 394
 395         // maybe some pasting
 396         if (lastbuffer->next() && paste_the_end) {
 397 #ifndef NEW_INSETS
 398             if (lastbuffer->next()->HasSameLayout(lastbuffer)) {
 399                 lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 400             } else if (!lastbuffer->next()->Last()) {
 401                 lastbuffer->next()->MakeSameLayout(lastbuffer);
 402                 lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 403             } else if (!lastbuffer->Last()) {
 404                 lastbuffer->MakeSameLayout(lastbuffer->next_);
 405                 lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 406 #else
 407             if (lastbuffer->next()->HasSameLayout(lastbuffer)) {
 408                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 409             } else if (!lastbuffer->next()->Last()) {
 410                 lastbuffer->next()->MakeSameLayout(lastbuffer);
 411                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 412             } else if (!lastbuffer->Last()) {
 413                 lastbuffer->MakeSameLayout(lastbuffer->next());
 414                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 415 #endif
 416             } else
 417                 lastbuffer->next()->StripLeadingSpaces(tc);
 418         }
 419         // restore the simple cut buffer
 420         buf = simple_cut_clone;
 421     }
 422
 423     return true;
 424 }
 425
 426
 427 int CutAndPaste::nrOfParagraphs()
 428 {
 429         if (!buf) return 0;
 430
 431         int n = 1;
 432         LyXParagraph * tmppar = buf;
 433 #ifndef NEW_INSETS
 434         while(tmppar->next_) {
 435                 ++n;
 436                 tmppar = tmppar->next_;
 437         }
 438 #else
 439         while(tmppar->next()) {
 440                 ++n;
 441                 tmppar = tmppar->next();
 442         }
 443 #endif
 444         return n;
 445 }
 446
 447
 448 int CutAndPaste::SwitchLayoutsBetweenClasses(LyXTextClassList::size_type c1,
 449                                              LyXTextClassList::size_type c2,
 450                                              LyXParagraph * par)
 451 {
 452     int ret = 0;
 453     if (!par || c1 == c2)
 454         return ret;
 455 #ifndef NEW_INSETS
 456     par = par->FirstPhysicalPar();
 457 #endif
 458     while (par) {
 459         string name = textclasslist.NameOfLayout(c1, par->layout);
 460         int lay = 0;
 461         pair<bool, LyXTextClass::LayoutList::size_type> pp =
 462             textclasslist.NumberOfLayout(c2, name);
 463         if (pp.first) {
 464             lay = pp.second;
 465         } else { // layout not found
 466             // use default layout "Standard" (0)
 467             lay = 0;
 468         }
 469         par->layout = lay;
 470
 471         if (name != textclasslist.NameOfLayout(c2, par->layout)) {
 472             ++ret;
 473             string s = _("Layout had to be changed from\n")
 474                     + name + _(" to ")
 475                     + textclasslist.NameOfLayout(c2, par->layout)
 476                     + _("\nbecause of class conversion from\n")
 477                     + textclasslist.NameOfClass(c1) + _(" to ")
 478                     + textclasslist.NameOfClass(c2);
 479             InsetError * new_inset = new InsetError(s);
 480             par->InsertInset(0, new_inset);
 481         }
 482 #ifndef NEW_INSETS
 483         par = par->next_;
 484 #else
 485         par = par->next();
 486 #endif
 487     }
 488     return ret;
 489 }
 490
 491
 492 bool CutAndPaste::checkPastePossible(LyXParagraph * par, int)
 493 {
 494     if (!buf) return false;
 495
 496 #ifndef NEW_INSETS
 497     // be carefull with footnotes in footnotes
 498     if (par->footnoteflag != LyXParagraph::NO_FOOTNOTE) {
 499         // check whether the cut_buffer includes a footnote
 500         LyXParagraph * tmppar = buf;
 501         while (tmppar && tmppar->footnoteflag == LyXParagraph::NO_FOOTNOTE)
 502             tmppar = tmppar->next_;
 503
 504         if (tmppar) {
 505             WriteAlert(_("Impossible operation"),
 506                        _("Can't paste float into float!"),
 507                        _("Sorry."));
 508             return false;
 509         }
 510     }
 511 #endif
 512     return true;
 513 }