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         buf = buf->next;
  65         delete tmppar;
  66     }
  67     buf = 0;
  68 }
  69
  70
  71 bool CutAndPaste::cutSelection(LyXParagraph * startpar, LyXParagraph ** endpar,
  72                                int start, int & end, char tc, bool doclear)
  73 {
  74     if (!startpar || (start > startpar->Last()))
  75         return false;
  76
  77     DeleteBuffer();
  78
  79     textclass = tc;
  80
  81     if (!(*endpar) ||
  82 #ifndef NEW_INSETS
  83         (startpar->ParFromPos(start) ==
  84          (*endpar)->ParFromPos(end))
  85 #else
  86         (startpar == (*endpar))
  87 #endif
  88             ) {
  89         // only within one paragraph
  90         buf = new LyXParagraph;
  91         LyXParagraph::size_type i = start;
  92         if (end > startpar->Last())
  93             end = startpar->Last();
  94         for (; i < end; ++i) {
  95             startpar->CopyIntoMinibuffer(current_view->buffer()->params,
  96                                          start);
  97 #ifndef NEW_TABULAR
  98             /* table stuff -- begin */
  99             if (startpar->table && startpar->IsNewline(start)) {
 100                 ++start;
 101             } else {
 102                 /* table stuff -- end */
 103 #endif
 104                 startpar->Erase(start);
 105 #ifndef NEW_TABULAR
 106             }
 107 #endif
 108             buf->InsertFromMinibuffer(buf->Last());
 109         }
 110     } else {
 111         // more than one paragraph
 112         (*endpar)->BreakParagraphConservative(current_view->buffer()->params,
 113                                               end);
 114         *endpar = (*endpar)->Next();
 115         end = 0;
 116
 117         startpar->BreakParagraphConservative(current_view->buffer()->params,
 118                                              start);
 119
 120         // store the selection
 121 #ifndef NEW_INSETS
 122         buf = startpar->ParFromPos(start)->next;
 123 #else
 124         buf = startpar->next;
 125 #endif
 126         buf->previous = 0;
 127         (*endpar)->previous->next = 0;
 128
 129         // cut the selection
 130 #ifndef NEW_INSETS
 131         startpar->ParFromPos(start)->next = (*endpar);
 132
 133         (*endpar)->previous = startpar->ParFromPos(start);
 134 #else
 135         startpar->next = (*endpar);
 136
 137         (*endpar)->previous = startpar;
 138 #endif
 139
 140 #ifndef NEW_INSETS
 141         // care about footnotes
 142         if (buf->footnoteflag) {
 143             LyXParagraph * tmppar = buf;
 144             while (tmppar){
 145                 tmppar->footnoteflag = LyXParagraph::NO_FOOTNOTE;
 146                 tmppar = tmppar->next;
 147             }
 148         }
 149 #endif
 150
 151         // the cut selection should begin with standard layout
 152         buf->Clear();
 153
 154         // paste the paragraphs again, if possible
 155         if (doclear)
 156             startpar->Next()->StripLeadingSpaces(textclass);
 157 #ifndef NEW_INSETS
 158         if (startpar->FirstPhysicalPar()->HasSameLayout(startpar->Next()) ||
 159 #else
 160         if (startpar->HasSameLayout(startpar->Next()) ||
 161 #endif
 162             !startpar->Next()->Last()) {
 163 #ifndef NEW_INSETS
 164             startpar->ParFromPos(start)->PasteParagraph(current_view->buffer()->params);
 165 #else
 166             startpar->PasteParagraph(current_view->buffer()->params);
 167 #endif
 168             (*endpar) = startpar; // this because endpar gets deleted here!
 169         }
 170     }
 171     return true;
 172 }
 173
 174
 175 bool CutAndPaste::copySelection(LyXParagraph * startpar, LyXParagraph * endpar,
 176                                 int start, int end, char tc)
 177 {
 178     if (!startpar || (start > startpar->Last()))
 179         return false;
 180
 181     DeleteBuffer();
 182
 183     textclass = tc;
 184
 185     if (!(endpar) ||
 186 #ifndef NEW_INSETS
 187         (startpar->ParFromPos(start) ==
 188                        (endpar)->ParFromPos(end))
 189 #else
 190         (startpar == endpar)
 191 #endif
 192             ) {
 193         // only within one paragraph
 194         buf = new LyXParagraph;
 195         LyXParagraph::size_type i = start;
 196         if (end > startpar->Last())
 197             end = startpar->Last();
 198         for (; i < end; ++i) {
 199             startpar->CopyIntoMinibuffer(current_view->buffer()->params, i);
 200             buf->InsertFromMinibuffer(buf->Last());
 201         }
 202     } else {
 203         // copy more than one paragraph
 204         // clone the paragraphs within the selection
 205 #ifndef NEW_INSETS
 206         LyXParagraph * tmppar = startpar->ParFromPos(start);
 207 #else
 208         LyXParagraph * tmppar = startpar;
 209 #endif
 210         buf = tmppar->Clone();
 211         LyXParagraph * tmppar2 = buf;
 212
 213         while (
 214 #ifndef NEW_INSETS
 215                 tmppar != endpar->ParFromPos(end)
 216 #else
 217                 tmppar != endpar
 218 #endif
 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
 227 #ifndef NEW_INSETS
 228         // care about footnotes
 229         if (buf->footnoteflag) {
 230             tmppar = buf;
 231             while (tmppar) {
 232                 tmppar->footnoteflag = LyXParagraph::NO_FOOTNOTE;
 233                 tmppar = tmppar->next;
 234             }
 235         }
 236 #endif
 237
 238         // the buf paragraph is too big
 239 #ifndef NEW_INSETS
 240         LyXParagraph::size_type tmpi2 = startpar->PositionInParFromPos(start);
 241 #else
 242         LyXParagraph::size_type tmpi2 = start;
 243 #endif
 244         for (; tmpi2; --tmpi2)
 245             buf->Erase(0);
 246
 247         // now tmppar 2 is too big, delete all after end
 248 #ifndef NEW_INSETS
 249         tmpi2 = endpar->PositionInParFromPos(end);
 250 #else
 251         tmpi2 = end;
 252 #endif
 253         while (tmppar2->size() > tmpi2) {
 254             tmppar2->Erase(tmppar2->size() - 1);
 255         }
 256     }
 257     return true;
 258 }
 259
 260
 261 bool CutAndPaste::pasteSelection(LyXParagraph ** par, LyXParagraph ** endpar,
 262                                  int & pos, char tc)
 263 {
 264     if (!checkPastePossible(*par, pos))
 265         return false;
 266
 267     if (pos > (*par)->Last())
 268         pos = (*par)->Last();
 269
 270     LyXParagraph * tmpbuf;
 271     LyXParagraph * tmppar = *par;
 272     int tmppos = pos;
 273
 274     // There are two cases: cutbuffer only one paragraph or many
 275     if (!buf->next) {
 276         // only within a paragraph
 277         tmpbuf = buf->Clone();
 278 #ifndef NEW_TABULAR
 279         /* table stuff -- begin */
 280         bool table_too_small = false;
 281         if ((*par)->table) {
 282             while (buf->size() && !table_too_small) {
 283                 if (buf->IsNewline(0)){
 284                     while((tmppos < tmppar->Last()) &&
 285                           !tmppar->IsNewline(tmppos))
 286                         ++tmppos;
 287                     buf->Erase(0);
 288                     if (tmppos < tmppar->Last())
 289                         ++tmppos;
 290                     else
 291                         table_too_small = true;
 292                 } else {
 293                     // This is an attempt to fix the
 294                     // "never insert a space at the
 295                     // beginning of a paragraph" problem.
 296                     if (!tmppos && buf->IsLineSeparator(0)) {
 297                         buf->Erase(0);
 298                     } else {
 299                         buf->CutIntoMinibuffer(current_view->buffer()->params, 0);
 300                         buf->Erase(0);
 301                         if (tmppar->InsertFromMinibuffer(tmppos))
 302                             ++tmppos;
 303                     }
 304                 }
 305             }
 306         } else {
 307             /* table stuff -- end */
 308 #endif
 309             // Some provisions should be done here for checking
 310             // if we are inserting at the beginning of a
 311             // paragraph. If there are a space at the beginning
 312             // of the text to insert and we are inserting at
 313             // the beginning of the paragraph the space should
 314             // be removed.
 315             while (buf->size()) {
 316                 // This is an attempt to fix the
 317                 // "never insert a space at the
 318                 // beginning of a paragraph" problem.
 319                 if (!tmppos && buf->IsLineSeparator(0)) {
 320                     buf->Erase(0);
 321                 } else {
 322                     buf->CutIntoMinibuffer(current_view->buffer()->params, 0);
 323                     buf->Erase(0);
 324                     if (tmppar->InsertFromMinibuffer(tmppos))
 325                         ++tmppos;
 326                 }
 327             }
 328 #ifndef NEW_TABULAR
 329         }
 330 #endif
 331         delete buf;
 332         buf = tmpbuf;
 333         *endpar = tmppar->Next();
 334         pos = tmppos;
 335     } else {
 336         // many paragraphs
 337
 338         // make a copy of the simple cut_buffer
 339         tmpbuf = buf;
 340         LyXParagraph * simple_cut_clone = tmpbuf->Clone();
 341         LyXParagraph * tmpbuf2 = simple_cut_clone;
 342 #ifndef NEW_INSETS
 343         if ((*par)->footnoteflag){
 344             tmpbuf->footnoteflag = (*par)->footnoteflag;
 345             tmpbuf->footnotekind = (*par)->footnotekind;
 346         }
 347 #endif
 348         while (tmpbuf->next) {
 349             tmpbuf = tmpbuf->next;
 350             tmpbuf2->next = tmpbuf->Clone();
 351             tmpbuf2->next->previous = tmpbuf2;
 352             tmpbuf2 = tmpbuf2->next;
 353 #ifndef NEW_INSETS
 354             if ((*par)->footnoteflag){
 355                 tmpbuf->footnoteflag = (*par)->footnoteflag;
 356                 tmpbuf->footnotekind = (*par)->footnotekind;
 357             }
 358 #endif
 359         }
 360
 361         // make sure there is no class difference
 362         SwitchLayoutsBetweenClasses(textclass, tc, buf);
 363
 364         // make the buf exactly the same layout than
 365         // the cursor paragraph
 366         buf->MakeSameLayout(*par);
 367
 368         // find the end of the buffer
 369         LyXParagraph * lastbuffer = buf;
 370         while (lastbuffer->Next())
 371             lastbuffer = lastbuffer->Next();
 372
 373         bool paste_the_end = false;
 374
 375         // open the paragraph for inserting the buf
 376         // if necessary
 377         if (((*par)->Last() > pos) || !(*par)->Next()) {
 378             (*par)->BreakParagraphConservative(current_view->buffer()->params,
 379                                                pos);
 380             paste_the_end = true;
 381         }
 382
 383         // set the end for redoing later
 384 #ifndef NEW_INSETS
 385         *endpar = (*par)->ParFromPos(pos)->next->Next();
 386
 387         // paste it!
 388         lastbuffer->ParFromPos(lastbuffer->Last())->next =
 389             (*par)->ParFromPos(pos)->next;
 390         (*par)->ParFromPos(pos)->next->previous =
 391             lastbuffer->ParFromPos(lastbuffer->Last());
 392
 393         (*par)->ParFromPos(pos)->next = buf;
 394         buf->previous = (*par)->ParFromPos(pos);
 395
 396         if ((*par)->ParFromPos(pos)->Next() == lastbuffer)
 397             lastbuffer = *par;
 398
 399         (*par)->ParFromPos(pos)->PasteParagraph(current_view->buffer()->params);
 400 #else
 401         *endpar = (*par)->next->Next();
 402
 403         // paste it!
 404         lastbuffer->next = (*par)->next;
 405         (*par)->next->previous = lastbuffer;
 406
 407         (*par)->next = buf;
 408         buf->previous = (*par);
 409
 410         if ((*par)->Next() == lastbuffer)
 411             lastbuffer = *par;
 412
 413         (*par)->PasteParagraph(current_view->buffer()->params);
 414 #endif
 415         // store the new cursor position
 416         *par = lastbuffer;
 417         pos = lastbuffer->Last();
 418
 419         // maybe some pasting
 420         if (lastbuffer->Next() && paste_the_end) {
 421 #ifndef NEW_INSETS
 422             if (lastbuffer->Next()->HasSameLayout(lastbuffer)) {
 423                 lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 424             } else if (!lastbuffer->Next()->Last()) {
 425                 lastbuffer->Next()->MakeSameLayout(lastbuffer);
 426                 lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 427             } else if (!lastbuffer->Last()) {
 428                 lastbuffer->MakeSameLayout(lastbuffer->next);
 429                 lastbuffer->ParFromPos(lastbuffer->Last())->PasteParagraph(current_view->buffer()->params);
 430 #else
 431             if (lastbuffer->Next()->HasSameLayout(lastbuffer)) {
 432                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 433             } else if (!lastbuffer->Next()->Last()) {
 434                 lastbuffer->Next()->MakeSameLayout(lastbuffer);
 435                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 436             } else if (!lastbuffer->Last()) {
 437                 lastbuffer->MakeSameLayout(lastbuffer->next);
 438                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 439 #endif
 440             } else
 441                 lastbuffer->Next()->StripLeadingSpaces(tc);
 442         }
 443         // restore the simple cut buffer
 444         buf = simple_cut_clone;
 445     }
 446
 447     return true;
 448 }
 449
 450
 451 int CutAndPaste::nrOfParagraphs() const
 452 {
 453         if (!buf) return 0;
 454
 455         int n = 1;
 456         LyXParagraph * tmppar = buf;
 457         while(tmppar->next) {
 458                 ++n;
 459                 tmppar = tmppar->next;
 460         }
 461         return n;
 462 }
 463
 464
 465 int CutAndPaste::SwitchLayoutsBetweenClasses(LyXTextClassList::size_type c1,
 466                                              LyXTextClassList::size_type c2,
 467                                              LyXParagraph * par)
 468 {
 469     int ret = 0;
 470     if (!par || c1 == c2)
 471         return ret;
 472 #ifndef NEW_INSETS
 473     par = par->FirstPhysicalPar();
 474 #endif
 475     while (par) {
 476         string name = textclasslist.NameOfLayout(c1, par->layout);
 477         int lay = 0;
 478         pair<bool, LyXTextClass::LayoutList::size_type> pp =
 479             textclasslist.NumberOfLayout(c2, name);
 480         if (pp.first) {
 481             lay = pp.second;
 482         } else { // layout not found
 483             // use default layout "Standard" (0)
 484             lay = 0;
 485         }
 486         par->layout = lay;
 487
 488         if (name != textclasslist.NameOfLayout(c2, par->layout)) {
 489             ++ret;
 490             string s = _("Layout had to be changed from\n")
 491                     + name + _(" to ")
 492                     + textclasslist.NameOfLayout(c2, par->layout)
 493                     + _("\nbecause of class conversion from\n")
 494                     + textclasslist.NameOfClass(c1) + _(" to ")
 495                     + textclasslist.NameOfClass(c2);
 496             InsetError * new_inset = new InsetError(s);
 497             par->InsertInset(0, new_inset);
 498         }
 499
 500         par = par->next;
 501     }
 502     return ret;
 503 }
 504
 505
 506 bool CutAndPaste::checkPastePossible(LyXParagraph * par, int) const
 507 {
 508     if (!buf) return false;
 509
 510 #ifndef NEW_INSETS
 511     // be carefull with footnotes in footnotes
 512     if (par->footnoteflag != LyXParagraph::NO_FOOTNOTE) {
 513         // check whether the cut_buffer includes a footnote
 514         LyXParagraph * tmppar = buf;
 515         while (tmppar && tmppar->footnoteflag == LyXParagraph::NO_FOOTNOTE)
 516             tmppar = tmppar->next;
 517
 518         if (tmppar) {
 519             WriteAlert(_("Impossible operation"),
 520                        _("Can't paste float into float!"),
 521                        _("Sorry."));
 522             return false;
 523         }
 524     }
 525 #endif
 526 #ifndef NEW_TABULAR
 527     /* table stuff -- begin */
 528     if (par->table) {
 529         if (buf->next) {
 530             WriteAlert(_("Impossible operation"),
 531                        _("Table cell cannot include more than one paragraph!"),
 532                        _("Sorry."));
 533             return false;
 534         }
 535     }
 536     /* table stuff -- end */
 537 #endif
 538     return true;
 539 }