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 #include "iterators.h"
  21
  22 #ifdef __GNUG__
  23 #pragma implementation
  24 #endif
  25
  26 using std::pair;
  27 using lyx::pos_type;
  28 using lyx::layout_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         // Paragraph * tmpbuf;
 221         Paragraph * tmppar = *par;
 222         int tmppos = pos;
 223
 224         // There are two cases: cutbuffer only one paragraph or many
 225         if (!buf->next()) {
 226                 // only within a paragraph
 227                 Paragraph * tmpbuf = new Paragraph(*buf, false);
 228
 229                 // Some provisions should be done here for checking
 230                 // if we are inserting at the beginning of a
 231                 // paragraph. If there are a space at the beginning
 232                 // of the text to insert and we are inserting at
 233                 // the beginning of the paragraph the space should
 234                 // be removed.
 235                 while (buf->size()) {
 236                         // This is an attempt to fix the
 237                         // "never insert a space at the
 238                         // beginning of a paragraph" problem.
 239                         if (!tmppos && buf->isLineSeparator(0)) {
 240                                 buf->erase(0);
 241                         } else {
 242                                 buf->cutIntoMinibuffer(current_view->buffer()->params, 0);
 243                                 buf->erase(0);
 244                                 if (tmppar->insertFromMinibuffer(tmppos))
 245                                         ++tmppos;
 246                         }
 247                 }
 248                 delete buf;
 249                 buf = tmpbuf;
 250                 *endpar = tmppar->next();
 251                 pos = tmppos;
 252         } else {
 253                 // many paragraphs
 254
 255                 // make a copy of the simple cut_buffer
 256                 Paragraph * tmpbuf = buf;
 257                 Paragraph * simple_cut_clone = new Paragraph(*tmpbuf, false);
 258                 Paragraph * tmpbuf2 = simple_cut_clone;
 259
 260                 while (tmpbuf->next()) {
 261                         tmpbuf = tmpbuf->next();
 262                         tmpbuf2->next(new Paragraph(*tmpbuf, false));
 263                         tmpbuf2->next()->previous(tmpbuf2);
 264                         tmpbuf2 = tmpbuf2->next();
 265                 }
 266
 267                 // now remove all out of the buffer which is NOT allowed in the
 268                 // new environment and set also another font if that is required
 269                 tmpbuf = buf;
 270                 while(tmpbuf) {
 271                         for(pos_type i = 0; i < tmpbuf->size(); ++i) {
 272                                 if (tmpbuf->getChar(i) == Paragraph::META_INSET) {
 273                                         if (!(*par)->insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 274                                         {
 275                                                 tmpbuf->erase(i--);
 276                                         }
 277                                 } else {
 278                                         LyXFont f1 = tmpbuf->getFont(current_view->buffer()->params,i);
 279                                         LyXFont f2 = f1;
 280                                         if (!(*par)->checkInsertChar(f1)) {
 281                                                 tmpbuf->erase(i--);
 282                                         } else if (f1 != f2) {
 283                                                 tmpbuf->setFont(i, f1);
 284                                         }
 285                                 }
 286                         }
 287                         tmpbuf = tmpbuf->next();
 288                 }
 289
 290                 // make sure there is no class difference
 291                 SwitchLayoutsBetweenClasses(textclass, tc, buf);
 292
 293                 // make the buf exactly the same layout than
 294                 // the cursor paragraph
 295                 buf->makeSameLayout(*par);
 296
 297                 // find the end of the buffer
 298                 Paragraph * lastbuffer = buf;
 299                 while (lastbuffer->next())
 300                         lastbuffer = lastbuffer->next();
 301
 302                 bool paste_the_end = false;
 303
 304                 // open the paragraph for inserting the buf
 305                 // if necessary
 306                 if (((*par)->size() > pos) || !(*par)->next()) {
 307                         (*par)->breakParagraphConservative(current_view->buffer()->params,
 308                                                            pos);
 309                         paste_the_end = true;
 310                 }
 311                 // set the end for redoing later
 312                 *endpar = (*par)->next()->next();
 313
 314                 // paste it!
 315                 lastbuffer->next((*par)->next());
 316                 (*par)->next()->previous(lastbuffer);
 317
 318                 (*par)->next(buf);
 319                 buf->previous(*par);
 320
 321                 if ((*par)->next() == lastbuffer)
 322                         lastbuffer = *par;
 323
 324                 (*par)->pasteParagraph(current_view->buffer()->params);
 325                 // store the new cursor position
 326                 *par = lastbuffer;
 327                 pos = lastbuffer->size();
 328                 // maybe some pasting
 329                 if (lastbuffer->next() && paste_the_end) {
 330                         if (lastbuffer->next()->hasSameLayout(lastbuffer)) {
 331                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 332                         } else if (!lastbuffer->next()->size()) {
 333                                 lastbuffer->next()->makeSameLayout(lastbuffer);
 334                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 335                         } else if (!lastbuffer->size()) {
 336                                 lastbuffer->makeSameLayout(lastbuffer->next());
 337                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 338                         } else
 339                                 lastbuffer->next()->stripLeadingSpaces(tc);
 340                 }
 341                 // restore the simple cut buffer
 342                 buf = simple_cut_clone;
 343         }
 344
 345         return true;
 346 }
 347
 348
 349 int CutAndPaste::nrOfParagraphs()
 350 {
 351         if (!buf)
 352                 return 0;
 353
 354         int n = 1;
 355         Paragraph * tmppar = buf;
 356         while (tmppar->next()) {
 357                 ++n;
 358                 tmppar = tmppar->next();
 359         }
 360         return n;
 361 }
 362
 363
 364 int CutAndPaste::SwitchLayoutsBetweenClasses(textclass_type c1,
 365                                              textclass_type c2, Paragraph * par)
 366 {
 367         int ret = 0;
 368         if (!par || c1 == c2)
 369                 return ret;
 370
 371         ParIterator end = ParIterator();
 372         for (ParIterator it = ParIterator(par); it != end; ++it) {
 373                 par = *it;
 374                 string const name = textclasslist.NameOfLayout(c1, par->layout);
 375                 int lay = 0;
 376                 pair<bool, layout_type> pp =
 377                         textclasslist.NumberOfLayout(c2, name);
 378                 if (pp.first) {
 379                         lay = pp.second;
 380                 } else {
 381                         // not found: use default layout "Standard" (0)
 382                         lay = 0;
 383                 }
 384                 par->layout = lay;
 385
 386                 if (name != textclasslist.NameOfLayout(c2, par->layout)) {
 387                         ++ret;
 388                         string const s = _("Layout had to be changed from\n")
 389                                 + name + _(" to ")
 390                                 + textclasslist.NameOfLayout(c2, par->layout)
 391                                 + _("\nbecause of class conversion from\n")
 392                                 + textclasslist.NameOfClass(c1) + _(" to ")
 393                                 + textclasslist.NameOfClass(c2);
 394                         InsetError * new_inset = new InsetError(s);
 395                         par->insertInset(0, new_inset);
 396                 }
 397         }
 398         return ret;
 399 }
 400
 401
 402 bool CutAndPaste::checkPastePossible(Paragraph *)
 403 {
 404         if (!buf) return false;
 405
 406         return true;
 407 }