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 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "CutAndPaste.h"
  17 #include "BufferView.h"
  18 #include "buffer.h"
  19 #include "paragraph.h"
  20 #include "lyxcursor.h"
  21 #include "gettext.h"
  22 #include "iterators.h"
  23 #include "lyxtextclasslist.h"
  24
  25 #include "insets/inseterror.h"
  26
  27 using std::pair;
  28 using lyx::pos_type;
  29 using lyx::textclass_type;
  30
  31 extern BufferView * current_view;
  32
  33 // Jürgen, note that this means that you cannot currently have a list
  34 // of selections cut/copied. So IMHO later we should have a
  35 // list/vector/deque that we could store
  36 // struct selection_item {
  37 //       Paragraph * buf;
  38 //       LyXTextClassList::size_type textclass;
  39 // };
  40 // in and some method of choosing beween them (based on the first few chars
  41 // in the selection probably.) This would be a nice feature and quite
  42 // easy to implement. (Lgb)
  43 //
  44 // Sure but I just cleaned up this code for now with the same functionality
  45 // as before. I also want to add a XClipboard function so that we can copy
  46 // text from LyX to some other X-application in the form of ASCII or in the
  47 // form of LaTeX (or Docbook depending on the document-class!). Think how nice
  48 // it could be to select a math-inset do a "Copy to X-Clipboard as LaTeX" and
  49 // then do a middle mouse button click in the application you want and have
  50 // the whole formula there in LaTeX-Code. (Jug)
  51
  52 namespace {
  53
  54 Paragraph * buf = 0;
  55 textclass_type textclass = 0;
  56
  57 // for now here this should be in another Cut&Paste Class!
  58 // Jürgen, I moved this out of CutAndPaste since it does not operate on any
  59 // member of the CutAndPaste class and in addition it was private.
  60 // Perhaps it even should take a parameter? (Lgb)
  61 void DeleteBuffer()
  62 {
  63         if (!buf)
  64                 return;
  65
  66         Paragraph * tmppar;
  67
  68         while (buf) {
  69                 tmppar =  buf;
  70                 buf = buf->next();
  71                 delete tmppar;
  72         }
  73         buf = 0;
  74 }
  75
  76 } // namespace anon
  77
  78
  79 bool CutAndPaste::cutSelection(Paragraph * startpar, Paragraph ** endpar,
  80                                int start, int & end, char tc, bool doclear,
  81                                                            bool realcut)
  82 {
  83         if (!startpar || (start > startpar->size()))
  84                 return false;
  85
  86         if (realcut)
  87                 DeleteBuffer();
  88
  89         textclass = tc;
  90
  91         if (!(*endpar) || startpar == (*endpar)) {
  92                 // only within one paragraph
  93                 if (realcut)
  94                         buf = new Paragraph;
  95                 pos_type i = start;
  96                 if (end > startpar->size())
  97                         end = startpar->size();
  98                 for (; i < end; ++i) {
  99                         if (realcut)
 100                                 startpar->copyIntoMinibuffer(*current_view->buffer(),
 101                                                              start);
 102                         startpar->erase(start);
 103                         if (realcut)
 104                                 buf->insertFromMinibuffer(buf->size());
 105                 }
 106                 end = start - 1;
 107         } else {
 108                 // more than one paragraph
 109                 (*endpar)->breakParagraphConservative(current_view->buffer()->params,
 110                                                       end);
 111                 *endpar = (*endpar)->next();
 112                 end = 0;
 113
 114                 startpar->breakParagraphConservative(current_view->buffer()->params,
 115                                                      start);
 116
 117                 // store the selection
 118                 if (realcut) {
 119                         buf = startpar->next();
 120                         buf->previous(0);
 121                 } else {
 122                         startpar->next()->previous(0);
 123                 }
 124                 (*endpar)->previous()->next(0);
 125
 126                 // cut the selection
 127                 startpar->next(*endpar);
 128
 129                 (*endpar)->previous(startpar);
 130
 131                 // the cut selection should begin with standard layout
 132                 if (realcut)
 133                         buf->clear();
 134
 135                 // paste the paragraphs again, if possible
 136                 if (doclear)
 137                         startpar->next()->stripLeadingSpaces(textclass);
 138                 if (startpar->hasSameLayout(startpar->next()) ||
 139                     !startpar->next()->size()) {
 140                         startpar->pasteParagraph(current_view->buffer()->params);
 141                         (*endpar) = startpar; // this because endpar gets deleted here!
 142                 }
 143                 // this paragraph's are of noone's owner!
 144                 Paragraph * p = buf;
 145                 while (p) {
 146                         p->setInsetOwner(0);
 147                         p = p->next();
 148                 }
 149         }
 150         return true;
 151 }
 152
 153
 154 bool CutAndPaste::copySelection(Paragraph * startpar, Paragraph * endpar,
 155                                 int start, int end, char tc)
 156 {
 157         if (!startpar || (start > startpar->size()))
 158                 return false;
 159
 160         DeleteBuffer();
 161
 162         textclass = tc;
 163
 164         if (!endpar || startpar == endpar) {
 165                 // only within one paragraph
 166                 buf = new Paragraph;
 167                 pos_type i = start;
 168                 if (end > startpar->size())
 169                         end = startpar->size();
 170                 for (; i < end; ++i) {
 171                         startpar->copyIntoMinibuffer(*current_view->buffer(), i);
 172                         buf->insertFromMinibuffer(buf->size());
 173                 }
 174         } else {
 175                 // copy more than one paragraph
 176                 // clone the paragraphs within the selection
 177                 Paragraph * tmppar = startpar;
 178                 buf = new Paragraph(*tmppar, false);
 179                 Paragraph * tmppar2 = buf;
 180
 181                 while (tmppar != endpar
 182                        && tmppar->next()) {
 183                         tmppar = tmppar->next();
 184                         tmppar2->next(new Paragraph(*tmppar, false));
 185                         tmppar2->next()->previous(tmppar2);
 186                         tmppar2 = tmppar2->next();
 187                 }
 188                 tmppar2->next(0);
 189
 190                 // the buf paragraph is too big
 191                 pos_type tmpi2 = start;
 192                 for (; tmpi2; --tmpi2)
 193                         buf->erase(0);
 194
 195                 // now tmppar 2 is too big, delete all after end
 196                 tmpi2 = end;
 197                 while (tmppar2->size() > tmpi2) {
 198                         tmppar2->erase(tmppar2->size() - 1);
 199                 }
 200                 // this paragraph's are of noone's owner!
 201                 tmppar = buf;
 202                 while (tmppar) {
 203                         tmppar->setInsetOwner(0);
 204                         tmppar = tmppar->next();
 205                 }
 206         }
 207         return true;
 208 }
 209
 210
 211 bool CutAndPaste::pasteSelection(Paragraph ** par, Paragraph ** endpar,
 212                                  int & pos, char tc)
 213 {
 214         if (!checkPastePossible(*par))
 215                 return false;
 216
 217         if (pos > (*par)->size())
 218                 pos = (*par)->size();
 219
 220 #if 0
 221         // Paragraph * tmpbuf;
 222         Paragraph * tmppar = *par;
 223         int tmppos = pos;
 224
 225         // There are two cases: cutbuffer only one paragraph or many
 226         if (!buf->next()) {
 227                 // only within a paragraph
 228                 Paragraph * tmpbuf = new Paragraph(*buf, false);
 229
 230                 // Some provisions should be done here for checking
 231                 // if we are inserting at the beginning of a
 232                 // paragraph. If there are a space at the beginning
 233                 // of the text to insert and we are inserting at
 234                 // the beginning of the paragraph the space should
 235                 // be removed.
 236                 while (buf->size()) {
 237                         // This is an attempt to fix the
 238                         // "never insert a space at the
 239                         // beginning of a paragraph" problem.
 240                         if (!tmppos && buf->isLineSeparator(0)) {
 241                                 buf->erase(0);
 242                         } else {
 243                                 buf->cutIntoMinibuffer(current_view->buffer()->params, 0);
 244                                 buf->erase(0);
 245                                 if (tmppar->insertFromMinibuffer(tmppos))
 246                                         ++tmppos;
 247                         }
 248                 }
 249                 delete buf;
 250                 buf = tmpbuf;
 251                 *endpar = tmppar->next();
 252                 pos = tmppos;
 253         } else
 254 #endif
 255         {
 256                 // many paragraphs
 257
 258                 // make a copy of the simple cut_buffer
 259                 Paragraph * tmpbuf = buf;
 260                 Paragraph * simple_cut_clone = new Paragraph(*tmpbuf, false);
 261                 Paragraph * tmpbuf2 = simple_cut_clone;
 262
 263                 while (tmpbuf->next()) {
 264                         tmpbuf = tmpbuf->next();
 265                         tmpbuf2->next(new Paragraph(*tmpbuf, false));
 266                         tmpbuf2->next()->previous(tmpbuf2);
 267                         tmpbuf2 = tmpbuf2->next();
 268                 }
 269
 270                 // now remove all out of the buffer which is NOT allowed in the
 271                 // new environment and set also another font if that is required
 272                 tmpbuf = buf;
 273                 while(tmpbuf) {
 274                         // set the inset owner of this paragraph
 275                         tmpbuf->setInsetOwner((*par)->inInset());
 276                         for(pos_type i = 0; i < tmpbuf->size(); ++i) {
 277                                 if (tmpbuf->getChar(i) == Paragraph::META_INSET) {
 278                                         if (!(*par)->insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 279                                         {
 280                                                 tmpbuf->erase(i--);
 281                                         }
 282                                 } else {
 283                                         LyXFont f1 = tmpbuf->getFont(current_view->buffer()->params,i);
 284                                         LyXFont f2 = f1;
 285                                         if (!(*par)->checkInsertChar(f1)) {
 286                                                 tmpbuf->erase(i--);
 287                                         } else if (f1 != f2) {
 288                                                 tmpbuf->setFont(i, f1);
 289                                         }
 290                                 }
 291                         }
 292                         tmpbuf = tmpbuf->next();
 293                 }
 294
 295                 // make sure there is no class difference
 296                 SwitchLayoutsBetweenClasses(textclass, tc, buf,
 297                                             current_view->buffer()->params);
 298
 299                 // make the buf exactly the same layout than
 300                 // the cursor paragraph
 301                 buf->makeSameLayout(*par);
 302
 303                 // find the end of the buffer
 304                 Paragraph * lastbuffer = buf;
 305                 while (lastbuffer->next())
 306                         lastbuffer = lastbuffer->next();
 307
 308                 bool paste_the_end = false;
 309
 310                 // open the paragraph for inserting the buf
 311                 // if necessary
 312                 if (((*par)->size() > pos) || !(*par)->next()) {
 313                         (*par)->breakParagraphConservative(current_view->buffer()->params,
 314                                                            pos);
 315                         paste_the_end = true;
 316                 }
 317                 // set the end for redoing later
 318                 *endpar = (*par)->next()->next();
 319
 320                 // paste it!
 321                 lastbuffer->next((*par)->next());
 322                 (*par)->next()->previous(lastbuffer);
 323
 324                 (*par)->next(buf);
 325                 buf->previous(*par);
 326
 327                 if ((*par)->next() == lastbuffer)
 328                         lastbuffer = *par;
 329
 330                 (*par)->pasteParagraph(current_view->buffer()->params);
 331                 // store the new cursor position
 332                 *par = lastbuffer;
 333                 pos = lastbuffer->size();
 334                 // maybe some pasting
 335                 if (lastbuffer->next() && paste_the_end) {
 336                         if (lastbuffer->next()->hasSameLayout(lastbuffer)) {
 337                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 338                         } else if (!lastbuffer->next()->size()) {
 339                                 lastbuffer->next()->makeSameLayout(lastbuffer);
 340                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 341                         } else if (!lastbuffer->size()) {
 342                                 lastbuffer->makeSameLayout(lastbuffer->next());
 343                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 344                         } else
 345                                 lastbuffer->next()->stripLeadingSpaces(tc);
 346                 }
 347                 // restore the simple cut buffer
 348                 buf = simple_cut_clone;
 349         }
 350
 351         return true;
 352 }
 353
 354
 355 int CutAndPaste::nrOfParagraphs()
 356 {
 357         if (!buf)
 358                 return 0;
 359
 360         int n = 1;
 361         Paragraph * tmppar = buf;
 362         while (tmppar->next()) {
 363                 ++n;
 364                 tmppar = tmppar->next();
 365         }
 366         return n;
 367 }
 368
 369
 370 int CutAndPaste::SwitchLayoutsBetweenClasses(textclass_type c1,
 371                                              textclass_type c2,
 372                                              Paragraph * par,
 373                                              BufferParams const & bparams)
 374 {
 375         int ret = 0;
 376         if (!par || c1 == c2)
 377                 return ret;
 378
 379         ParIterator end = ParIterator();
 380         for (ParIterator it = ParIterator(par); it != end; ++it) {
 381                 par = *it;
 382                 string const name = par->layout();
 383                 LyXTextClass const & tclass = textclasslist[c2];
 384
 385                 bool hasLayout = tclass.hasLayout(name);
 386
 387                 string lay = tclass.defaultLayoutName();
 388                 if (hasLayout) {
 389                         lay = name;
 390                 } else {
 391                         // not found: use default layout
 392                         lay = tclass.defaultLayoutName();
 393                 }
 394                 par->layout(lay);
 395
 396                 if (name != par->layout()) {
 397                         ++ret;
 398                         string const s = _("Layout had to be changed from\n")
 399                                 + name + _(" to ")
 400                                 + par->layout()
 401                                 + _("\nbecause of class conversion from\n")
 402                                 + textclasslist[c1].name() + _(" to ")
 403                                 + textclasslist[c2].name();
 404                         InsetError * new_inset = new InsetError(s);
 405                         par->insertInset(0, new_inset,
 406                                          LyXFont(LyXFont::ALL_INHERIT,
 407                                                  bparams.language));
 408                 }
 409         }
 410         return ret;
 411 }
 412
 413
 414 bool CutAndPaste::checkPastePossible(Paragraph *)
 415 {
 416         if (!buf) return false;
 417
 418         return true;
 419 }