src/CutAndPaste.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995-2001 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 "paragraph.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 using lyx::pos_type;
  27 using lyx::layout_type;
  28 using lyx::textclass_type;
  29
  30 extern BufferView * current_view;
  31
  32 // Jürgen, note that this means that you cannot currently have a list
  33 // of selections cut/copied. So IMHO later we should have a
  34 // list/vector/deque that we could store
  35 // struct selection_item {
  36 //       Paragraph * buf;
  37 //       LyXTextClassList::size_type textclass;
  38 // };
  39 // in and some method of choosing beween them (based on the first few chars
  40 // in the selection probably.) This would be a nice feature and quite
  41 // easy to implement. (Lgb)
  42 //
  43 // Sure but I just cleaned up this code for now with the same functionality
  44 // as before. I also want to add a XClipboard function so that we can copy
  45 // text from LyX to some other X-application in the form of ASCII or in the
  46 // form of LaTeX (or Docbook depending on the document-class!). Think how nice
  47 // it could be to select a math-inset do a "Copy to X-Clipboard as LaTeX" and
  48 // then do a middle mouse button click in the application you want and have
  49 // the whole formula there in LaTeX-Code. (Jug)
  50
  51 namespace {
  52
  53 Paragraph * buf = 0;
  54 textclass_type textclass = 0;
  55
  56 // for now here this should be in another Cut&Paste Class!
  57 // Jürgen, I moved this out of CutAndPaste since it does not operate on any
  58 // member of the CutAndPaste class and in addition it was private.
  59 // Perhaps it even should take a parameter? (Lgb)
  60 void DeleteBuffer()
  61 {
  62         if (!buf)
  63                 return;
  64
  65         Paragraph * tmppar;
  66
  67         while (buf) {
  68                 tmppar =  buf;
  69                 buf = buf->next();
  70                 delete tmppar;
  71         }
  72         buf = 0;
  73 }
  74
  75 } // namespace anon
  76
  77
  78 bool CutAndPaste::cutSelection(Paragraph * startpar, Paragraph ** endpar,
  79                                int start, int & end, char tc, bool doclear,
  80                                                            bool realcut)
  81 {
  82         if (!startpar || (start > startpar->size()))
  83                 return false;
  84
  85         if (realcut)
  86                 DeleteBuffer();
  87
  88         textclass = tc;
  89
  90         if (!(*endpar) || startpar == (*endpar)) {
  91                 // only within one paragraph
  92                 if (realcut)
  93                         buf = new Paragraph;
  94                 pos_type i = start;
  95                 if (end > startpar->size())
  96                         end = startpar->size();
  97                 for (; i < end; ++i) {
  98                         if (realcut)
  99                                 startpar->copyIntoMinibuffer(*current_view->buffer(),
 100                                                              start);
 101                         startpar->erase(start);
 102                         if (realcut)
 103                                 buf->insertFromMinibuffer(buf->size());
 104                 }
 105                 end = start - 1;
 106         } else {
 107                 // more than one paragraph
 108                 (*endpar)->breakParagraphConservative(current_view->buffer()->params,
 109                                                       end);
 110                 *endpar = (*endpar)->next();
 111                 end = 0;
 112
 113                 startpar->breakParagraphConservative(current_view->buffer()->params,
 114                                                      start);
 115
 116                 // store the selection
 117                 if (realcut) {
 118                         buf = startpar->next();
 119                         buf->previous(0);
 120                 } else {
 121                         startpar->next()->previous(0);
 122                 }
 123                 (*endpar)->previous()->next(0);
 124
 125                 // cut the selection
 126                 startpar->next(*endpar);
 127
 128                 (*endpar)->previous(startpar);
 129
 130                 // the cut selection should begin with standard layout
 131                 if (realcut)
 132                         buf->clear();
 133
 134                 // paste the paragraphs again, if possible
 135                 if (doclear)
 136                         startpar->next()->stripLeadingSpaces(textclass);
 137                 if (startpar->hasSameLayout(startpar->next()) ||
 138                     !startpar->next()->size()) {
 139                         startpar->pasteParagraph(current_view->buffer()->params);
 140                         (*endpar) = startpar; // this because endpar gets deleted here!
 141                 }
 142                 // this paragraph's are of noone's owner!
 143                 Paragraph * p = buf;
 144                 while(p) {
 145                         p->setInsetOwner(0);
 146                         p = p->next();
 147                 }
 148         }
 149         return true;
 150 }
 151
 152
 153 bool CutAndPaste::copySelection(Paragraph * startpar, Paragraph * endpar,
 154                                 int start, int end, char tc)
 155 {
 156         if (!startpar || (start > startpar->size()))
 157                 return false;
 158
 159         DeleteBuffer();
 160
 161         textclass = tc;
 162
 163         if (!endpar || startpar == endpar) {
 164                 // only within one paragraph
 165                 buf = new Paragraph;
 166                 pos_type i = start;
 167                 if (end > startpar->size())
 168                         end = startpar->size();
 169                 for (; i < end; ++i) {
 170                         startpar->copyIntoMinibuffer(*current_view->buffer(), i);
 171                         buf->insertFromMinibuffer(buf->size());
 172                 }
 173         } else {
 174                 // copy more than one paragraph
 175                 // clone the paragraphs within the selection
 176                 Paragraph * tmppar = startpar;
 177                 buf = new Paragraph(*tmppar, false);
 178                 Paragraph * tmppar2 = buf;
 179
 180                 while (tmppar != endpar
 181                        && tmppar->next()) {
 182                         tmppar = tmppar->next();
 183                         tmppar2->next(new Paragraph(*tmppar, false));
 184                         tmppar2->next()->previous(tmppar2);
 185                         tmppar2 = tmppar2->next();
 186                 }
 187                 tmppar2->next(0);
 188
 189                 // the buf paragraph is too big
 190                 pos_type tmpi2 = start;
 191                 for (; tmpi2; --tmpi2)
 192                         buf->erase(0);
 193
 194                 // now tmppar 2 is too big, delete all after end
 195                 tmpi2 = end;
 196                 while (tmppar2->size() > tmpi2) {
 197                         tmppar2->erase(tmppar2->size() - 1);
 198                 }
 199                 // this paragraph's are of noone's owner!
 200                 tmppar = buf;
 201                 while(tmppar) {
 202                         tmppar->setInsetOwner(0);
 203                         tmppar = tmppar->next();
 204                 }
 205         }
 206         return true;
 207 }
 208
 209
 210 bool CutAndPaste::pasteSelection(Paragraph ** par, Paragraph ** endpar,
 211                                  int & pos, char tc)
 212 {
 213         if (!checkPastePossible(*par))
 214                 return false;
 215
 216         if (pos > (*par)->size())
 217                 pos = (*par)->size();
 218
 219         // Paragraph * tmpbuf;
 220         Paragraph * tmppar = *par;
 221         int tmppos = pos;
 222
 223         // There are two cases: cutbuffer only one paragraph or many
 224         if (!buf->next()) {
 225                 // only within a paragraph
 226                 Paragraph * tmpbuf = new Paragraph(*buf, false);
 227
 228                 // Some provisions should be done here for checking
 229                 // if we are inserting at the beginning of a
 230                 // paragraph. If there are a space at the beginning
 231                 // of the text to insert and we are inserting at
 232                 // the beginning of the paragraph the space should
 233                 // be removed.
 234                 while (buf->size()) {
 235                         // This is an attempt to fix the
 236                         // "never insert a space at the
 237                         // beginning of a paragraph" problem.
 238                         if (!tmppos && buf->isLineSeparator(0)) {
 239                                 buf->erase(0);
 240                         } else {
 241                                 buf->cutIntoMinibuffer(current_view->buffer()->params, 0);
 242                                 buf->erase(0);
 243                                 if (tmppar->insertFromMinibuffer(tmppos))
 244                                         ++tmppos;
 245                         }
 246                 }
 247                 delete buf;
 248                 buf = tmpbuf;
 249                 *endpar = tmppar->next();
 250                 pos = tmppos;
 251         } else {
 252                 // many paragraphs
 253
 254                 // make a copy of the simple cut_buffer
 255                 Paragraph * tmpbuf = buf;
 256                 Paragraph * simple_cut_clone = new Paragraph(*tmpbuf, false);
 257                 Paragraph * tmpbuf2 = simple_cut_clone;
 258
 259                 while (tmpbuf->next()) {
 260                         tmpbuf = tmpbuf->next();
 261                         tmpbuf2->next(new Paragraph(*tmpbuf, false));
 262                         tmpbuf2->next()->previous(tmpbuf2);
 263                         tmpbuf2 = tmpbuf2->next();
 264                 }
 265
 266                 // make sure there is no class difference
 267                 SwitchLayoutsBetweenClasses(textclass, tc, buf);
 268
 269                 // make the buf exactly the same layout than
 270                 // the cursor paragraph
 271                 buf->makeSameLayout(*par);
 272
 273                 // find the end of the buffer
 274                 Paragraph * lastbuffer = buf;
 275                 while (lastbuffer->next())
 276                         lastbuffer = lastbuffer->next();
 277
 278                 bool paste_the_end = false;
 279
 280                 // open the paragraph for inserting the buf
 281                 // if necessary
 282                 if (((*par)->size() > pos) || !(*par)->next()) {
 283                         (*par)->breakParagraphConservative(current_view->buffer()->params,
 284                                                            pos);
 285                         paste_the_end = true;
 286                 }
 287                 // set the end for redoing later
 288                 *endpar = (*par)->next()->next();
 289
 290                 // paste it!
 291                 lastbuffer->next((*par)->next());
 292                 (*par)->next()->previous(lastbuffer);
 293
 294                 (*par)->next(buf);
 295                 buf->previous(*par);
 296
 297                 if ((*par)->next() == lastbuffer)
 298                         lastbuffer = *par;
 299
 300                 (*par)->pasteParagraph(current_view->buffer()->params);
 301                 // store the new cursor position
 302                 *par = lastbuffer;
 303                 pos = lastbuffer->size();
 304                 // maybe some pasting
 305                 if (lastbuffer->next() && paste_the_end) {
 306                         if (lastbuffer->next()->hasSameLayout(lastbuffer)) {
 307                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 308                         } else if (!lastbuffer->next()->size()) {
 309                                 lastbuffer->next()->makeSameLayout(lastbuffer);
 310                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 311                         } else if (!lastbuffer->size()) {
 312                                 lastbuffer->makeSameLayout(lastbuffer->next());
 313                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 314                         } else
 315                                 lastbuffer->next()->stripLeadingSpaces(tc);
 316                 }
 317                 // restore the simple cut buffer
 318                 buf = simple_cut_clone;
 319         }
 320
 321         return true;
 322 }
 323
 324
 325 int CutAndPaste::nrOfParagraphs()
 326 {
 327         if (!buf)
 328                 return 0;
 329
 330         int n = 1;
 331         Paragraph * tmppar = buf;
 332         while(tmppar->next()) {
 333                 ++n;
 334                 tmppar = tmppar->next();
 335         }
 336         return n;
 337 }
 338
 339
 340 int CutAndPaste::SwitchLayoutsBetweenClasses(textclass_type c1,
 341                                              textclass_type c2, Paragraph * par)
 342 {
 343         int ret = 0;
 344         if (!par || c1 == c2)
 345                 return ret;
 346
 347         while (par) {
 348                 string const name = textclasslist.NameOfLayout(c1, par->layout);
 349                 int lay = 0;
 350                 pair<bool, layout_type> pp =
 351                         textclasslist.NumberOfLayout(c2, name);
 352                 if (pp.first) {
 353                         lay = pp.second;
 354                 } else { // layout not found
 355                         // use default layout "Standard" (0)
 356                         lay = 0;
 357                 }
 358                 par->layout = lay;
 359
 360                 if (name != textclasslist.NameOfLayout(c2, par->layout)) {
 361                         ++ret;
 362                         string const s = _("Layout had to be changed from\n")
 363                                 + name + _(" to ")
 364                                 + textclasslist.NameOfLayout(c2, par->layout)
 365                                 + _("\nbecause of class conversion from\n")
 366                                 + textclasslist.NameOfClass(c1) + _(" to ")
 367                                 + textclasslist.NameOfClass(c2);
 368                         InsetError * new_inset = new InsetError(s);
 369                         par->insertInset(0, new_inset);
 370                 }
 371                 par = par->next();
 372         }
 373         return ret;
 374 }
 375
 376
 377 bool CutAndPaste::checkPastePossible(Paragraph *)
 378 {
 379         if (!buf) return false;
 380
 381         return true;
 382 }