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                 buf = buf->next();
  67                 delete tmppar;
  68     }
  69     buf = 0;
  70 }
  71
  72 } // namespace anon
  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->size()))
  79                 return false;
  80
  81         DeleteBuffer();
  82
  83         textclass = tc;
  84
  85         if (!(*endpar) ||
  86             startpar == (*endpar)) {
  87                 // only within one paragraph
  88                 buf = new LyXParagraph;
  89                 LyXParagraph::size_type i = start;
  90                 if (end > startpar->size())
  91                         end = startpar->size();
  92                 for (; i < end; ++i) {
  93                         startpar->CopyIntoMinibuffer(*current_view->buffer(),
  94                                                      start);
  95                         startpar->Erase(start);
  96
  97                         buf->InsertFromMinibuffer(buf->size());
  98                 }
  99                 end = start - 1;
 100         } else {
 101                 // more than one paragraph
 102                 (*endpar)->BreakParagraphConservative(current_view->buffer()->params,
 103                                                       end);
 104                 *endpar = (*endpar)->next();
 105                 end = 0;
 106
 107                 startpar->BreakParagraphConservative(current_view->buffer()->params,
 108                                                      start);
 109
 110                 // store the selection
 111                 buf = startpar->next();
 112
 113                 buf->previous(0);
 114                 (*endpar)->previous()->next(0);
 115
 116                 // cut the selection
 117                 startpar->next(*endpar);
 118
 119                 (*endpar)->previous(startpar);
 120
 121                 // the cut selection should begin with standard layout
 122                 buf->Clear();
 123
 124                 // paste the paragraphs again, if possible
 125                 if (doclear)
 126                         startpar->next()->StripLeadingSpaces(textclass);
 127                 if (startpar->HasSameLayout(startpar->next()) ||
 128                     !startpar->next()->size()) {
 129                         startpar->PasteParagraph(current_view->buffer()->params);
 130                         (*endpar) = startpar; // this because endpar gets deleted here!
 131                 }
 132         }
 133         return true;
 134 }
 135
 136
 137 bool CutAndPaste::copySelection(LyXParagraph * startpar, LyXParagraph * endpar,
 138                                 int start, int end, char tc)
 139 {
 140         if (!startpar || (start > startpar->size()))
 141                 return false;
 142
 143         DeleteBuffer();
 144
 145         textclass = tc;
 146
 147         if (!endpar ||
 148             startpar == endpar) {
 149                 // only within one paragraph
 150                 buf = new LyXParagraph;
 151                 LyXParagraph::size_type i = start;
 152                 if (end > startpar->size())
 153                         end = startpar->size();
 154                 for (; i < end; ++i) {
 155                         startpar->CopyIntoMinibuffer(*current_view->buffer(), i);
 156                         buf->InsertFromMinibuffer(buf->size());
 157                 }
 158         } else {
 159                 // copy more than one paragraph
 160                 // clone the paragraphs within the selection
 161                 LyXParagraph * tmppar = startpar;
 162 #if 0
 163                 buf = tmppar->Clone();
 164 #else
 165                 buf = new LyXParagraph(*tmppar);
 166 #endif
 167                 LyXParagraph * tmppar2 = buf;
 168
 169                 while (tmppar != endpar
 170                        && tmppar->next()) {
 171                         tmppar = tmppar->next();
 172 #if 0
 173                         tmppar2->next(tmppar->Clone());
 174 #else
 175                         tmppar2->next(new LyXParagraph(*tmppar));
 176 #endif
 177                         tmppar2->next()->previous(tmppar2);
 178                         tmppar2 = tmppar2->next();
 179                 }
 180                 tmppar2->next(0);
 181
 182                 // the buf paragraph is too big
 183                 LyXParagraph::size_type tmpi2 = start;
 184                 for (; tmpi2; --tmpi2)
 185                         buf->Erase(0);
 186
 187                 // now tmppar 2 is too big, delete all after end
 188                 tmpi2 = end;
 189                 while (tmppar2->size() > tmpi2) {
 190                         tmppar2->Erase(tmppar2->size() - 1);
 191                 }
 192         }
 193         return true;
 194 }
 195
 196
 197 bool CutAndPaste::pasteSelection(LyXParagraph ** par, LyXParagraph ** endpar,
 198                                  int & pos, char tc)
 199 {
 200         if (!checkPastePossible(*par))
 201                 return false;
 202
 203         if (pos > (*par)->size())
 204                 pos = (*par)->size();
 205
 206         // LyXParagraph * tmpbuf;
 207         LyXParagraph * tmppar = *par;
 208         int tmppos = pos;
 209
 210         // There are two cases: cutbuffer only one paragraph or many
 211         if (!buf->next()) {
 212                 // only within a paragraph
 213 #if 0
 214                 LyXParagraph * tmpbuf = buf->Clone();
 215 #else
 216                 LyXParagraph * tmpbuf = new LyXParagraph(*buf);
 217 #endif
 218                 // Some provisions should be done here for checking
 219                 // if we are inserting at the beginning of a
 220                 // paragraph. If there are a space at the beginning
 221                 // of the text to insert and we are inserting at
 222                 // the beginning of the paragraph the space should
 223                 // be removed.
 224                 while (buf->size()) {
 225                         // This is an attempt to fix the
 226                         // "never insert a space at the
 227                         // beginning of a paragraph" problem.
 228                         if (!tmppos && buf->IsLineSeparator(0)) {
 229                                 buf->Erase(0);
 230                         } else {
 231                                 buf->CutIntoMinibuffer(current_view->buffer()->params, 0);
 232                                 buf->Erase(0);
 233                                 if (tmppar->InsertFromMinibuffer(tmppos))
 234                                         ++tmppos;
 235                         }
 236                 }
 237                 delete buf;
 238                 buf = tmpbuf;
 239                 *endpar = tmppar->next();
 240                 pos = tmppos;
 241         } else {
 242                 // many paragraphs
 243
 244                 // make a copy of the simple cut_buffer
 245                 LyXParagraph * tmpbuf = buf;
 246 #if 0
 247                 LyXParagraph * simple_cut_clone = tmpbuf->Clone();
 248 #else
 249                 LyXParagraph * simple_cut_clone = new LyXParagraph(*tmpbuf);
 250 #endif
 251                 LyXParagraph * tmpbuf2 = simple_cut_clone;
 252                 while (tmpbuf->next()) {
 253                         tmpbuf = tmpbuf->next();
 254 #if 0
 255                         tmpbuf2->next(tmpbuf->Clone());
 256 #else
 257                         tmpbuf2->next(new LyXParagraph(*tmpbuf));
 258 #endif
 259                         tmpbuf2->next()->previous(tmpbuf2);
 260                         tmpbuf2 = tmpbuf2->next();
 261                 }
 262
 263                 // make sure there is no class difference
 264                 SwitchLayoutsBetweenClasses(textclass, tc, buf);
 265
 266                 // make the buf exactly the same layout than
 267                 // the cursor paragraph
 268                 buf->MakeSameLayout(*par);
 269
 270                 // find the end of the buffer
 271                 LyXParagraph * lastbuffer = buf;
 272                 while (lastbuffer->next())
 273                         lastbuffer = lastbuffer->next();
 274
 275                 bool paste_the_end = false;
 276
 277                 // open the paragraph for inserting the buf
 278                 // if necessary
 279                 if (((*par)->size() > pos) || !(*par)->next()) {
 280                         (*par)->BreakParagraphConservative(current_view->buffer()->params,
 281                                                            pos);
 282                         paste_the_end = true;
 283                 }
 284                 // set the end for redoing later
 285                 *endpar = (*par)->next()->next();
 286
 287                 // paste it!
 288                 lastbuffer->next((*par)->next());
 289                 (*par)->next()->previous(lastbuffer);
 290
 291                 (*par)->next(buf);
 292                 buf->previous(*par);
 293
 294                 if ((*par)->next() == lastbuffer)
 295                         lastbuffer = *par;
 296
 297                 (*par)->PasteParagraph(current_view->buffer()->params);
 298                 // store the new cursor position
 299                 *par = lastbuffer;
 300                 pos = lastbuffer->size();
 301                 // maybe some pasting
 302                 if (lastbuffer->next() && paste_the_end) {
 303                         if (lastbuffer->next()->HasSameLayout(lastbuffer)) {
 304                                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 305                         } else if (!lastbuffer->next()->size()) {
 306                                 lastbuffer->next()->MakeSameLayout(lastbuffer);
 307                                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 308                         } else if (!lastbuffer->size()) {
 309                                 lastbuffer->MakeSameLayout(lastbuffer->next());
 310                                 lastbuffer->PasteParagraph(current_view->buffer()->params);
 311                         } else
 312                                 lastbuffer->next()->StripLeadingSpaces(tc);
 313                 }
 314                 // restore the simple cut buffer
 315                 buf = simple_cut_clone;
 316         }
 317
 318         return true;
 319 }
 320
 321
 322 int CutAndPaste::nrOfParagraphs()
 323 {
 324         if (!buf)
 325                 return 0;
 326
 327         int n = 1;
 328         LyXParagraph * tmppar = buf;
 329         while(tmppar->next()) {
 330                 ++n;
 331                 tmppar = tmppar->next();
 332         }
 333         return n;
 334 }
 335
 336
 337 int CutAndPaste::SwitchLayoutsBetweenClasses(LyXTextClassList::size_type c1,
 338                                              LyXTextClassList::size_type c2,
 339                                              LyXParagraph * par)
 340 {
 341     int ret = 0;
 342     if (!par || c1 == c2)
 343                 return ret;
 344
 345     while (par) {
 346                 string name = textclasslist.NameOfLayout(c1, par->layout);
 347                 int lay = 0;
 348                 pair<bool, LyXTextClass::LayoutList::size_type> pp =
 349                         textclasslist.NumberOfLayout(c2, name);
 350                 if (pp.first) {
 351                         lay = pp.second;
 352                 } else { // layout not found
 353                         // use default layout "Standard" (0)
 354                         lay = 0;
 355                 }
 356                 par->layout = lay;
 357
 358                 if (name != textclasslist.NameOfLayout(c2, par->layout)) {
 359                         ++ret;
 360                         string s = _("Layout had to be changed from\n")
 361                                 + name + _(" to ")
 362                                 + textclasslist.NameOfLayout(c2, par->layout)
 363                                 + _("\nbecause of class conversion from\n")
 364                                 + textclasslist.NameOfClass(c1) + _(" to ")
 365                                 + textclasslist.NameOfClass(c2);
 366                         InsetError * new_inset = new InsetError(s);
 367                         par->InsertInset(0, new_inset);
 368                 }
 369                 par = par->next();
 370     }
 371     return ret;
 372 }
 373
 374
 375 bool CutAndPaste::checkPastePossible(LyXParagraph *)
 376 {
 377     if (!buf) return false;
 378
 379     return true;
 380 }