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
  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 //       Paragraph * 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 Paragraph * 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         Paragraph * 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(Paragraph * startpar, Paragraph ** 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 Paragraph;
  89                 Paragraph::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(Paragraph * startpar, Paragraph * 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 Paragraph;
 151                 Paragraph::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                 Paragraph * tmppar = startpar;
 162                 buf = new Paragraph(*tmppar);
 163                 Paragraph * tmppar2 = buf;
 164
 165                 while (tmppar != endpar
 166                        && tmppar->next()) {
 167                         tmppar = tmppar->next();
 168                         tmppar2->next(new Paragraph(*tmppar));
 169                         tmppar2->next()->previous(tmppar2);
 170                         tmppar2 = tmppar2->next();
 171                 }
 172                 tmppar2->next(0);
 173
 174                 // the buf paragraph is too big
 175                 Paragraph::size_type tmpi2 = start;
 176                 for (; tmpi2; --tmpi2)
 177                         buf->erase(0);
 178
 179                 // now tmppar 2 is too big, delete all after end
 180                 tmpi2 = end;
 181                 while (tmppar2->size() > tmpi2) {
 182                         tmppar2->erase(tmppar2->size() - 1);
 183                 }
 184         }
 185         return true;
 186 }
 187
 188
 189 bool CutAndPaste::pasteSelection(Paragraph ** par, Paragraph ** endpar,
 190                                  int & pos, char tc)
 191 {
 192         if (!checkPastePossible(*par))
 193                 return false;
 194
 195         if (pos > (*par)->size())
 196                 pos = (*par)->size();
 197
 198         // Paragraph * tmpbuf;
 199         Paragraph * tmppar = *par;
 200         int tmppos = pos;
 201
 202         // There are two cases: cutbuffer only one paragraph or many
 203         if (!buf->next()) {
 204                 // only within a paragraph
 205                 Paragraph * tmpbuf = new Paragraph(*buf);
 206
 207                 // Some provisions should be done here for checking
 208                 // if we are inserting at the beginning of a
 209                 // paragraph. If there are a space at the beginning
 210                 // of the text to insert and we are inserting at
 211                 // the beginning of the paragraph the space should
 212                 // be removed.
 213                 while (buf->size()) {
 214                         // This is an attempt to fix the
 215                         // "never insert a space at the
 216                         // beginning of a paragraph" problem.
 217                         if (!tmppos && buf->isLineSeparator(0)) {
 218                                 buf->erase(0);
 219                         } else {
 220                                 buf->cutIntoMinibuffer(current_view->buffer()->params, 0);
 221                                 buf->erase(0);
 222                                 if (tmppar->insertFromMinibuffer(tmppos))
 223                                         ++tmppos;
 224                         }
 225                 }
 226                 delete buf;
 227                 buf = tmpbuf;
 228                 *endpar = tmppar->next();
 229                 pos = tmppos;
 230         } else {
 231                 // many paragraphs
 232
 233                 // make a copy of the simple cut_buffer
 234                 Paragraph * tmpbuf = buf;
 235                 Paragraph * simple_cut_clone = new Paragraph(*tmpbuf);
 236                 Paragraph * tmpbuf2 = simple_cut_clone;
 237
 238                 while (tmpbuf->next()) {
 239                         tmpbuf = tmpbuf->next();
 240                         tmpbuf2->next(new Paragraph(*tmpbuf));
 241                         tmpbuf2->next()->previous(tmpbuf2);
 242                         tmpbuf2 = tmpbuf2->next();
 243                 }
 244
 245                 // make sure there is no class difference
 246                 SwitchLayoutsBetweenClasses(textclass, tc, buf);
 247
 248                 // make the buf exactly the same layout than
 249                 // the cursor paragraph
 250                 buf->makeSameLayout(*par);
 251
 252                 // find the end of the buffer
 253                 Paragraph * lastbuffer = buf;
 254                 while (lastbuffer->next())
 255                         lastbuffer = lastbuffer->next();
 256
 257                 bool paste_the_end = false;
 258
 259                 // open the paragraph for inserting the buf
 260                 // if necessary
 261                 if (((*par)->size() > pos) || !(*par)->next()) {
 262                         (*par)->breakParagraphConservative(current_view->buffer()->params,
 263                                                            pos);
 264                         paste_the_end = true;
 265                 }
 266                 // set the end for redoing later
 267                 *endpar = (*par)->next()->next();
 268
 269                 // paste it!
 270                 lastbuffer->next((*par)->next());
 271                 (*par)->next()->previous(lastbuffer);
 272
 273                 (*par)->next(buf);
 274                 buf->previous(*par);
 275
 276                 if ((*par)->next() == lastbuffer)
 277                         lastbuffer = *par;
 278
 279                 (*par)->pasteParagraph(current_view->buffer()->params);
 280                 // store the new cursor position
 281                 *par = lastbuffer;
 282                 pos = lastbuffer->size();
 283                 // maybe some pasting
 284                 if (lastbuffer->next() && paste_the_end) {
 285                         if (lastbuffer->next()->hasSameLayout(lastbuffer)) {
 286                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 287                         } else if (!lastbuffer->next()->size()) {
 288                                 lastbuffer->next()->makeSameLayout(lastbuffer);
 289                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 290                         } else if (!lastbuffer->size()) {
 291                                 lastbuffer->makeSameLayout(lastbuffer->next());
 292                                 lastbuffer->pasteParagraph(current_view->buffer()->params);
 293                         } else
 294                                 lastbuffer->next()->stripLeadingSpaces(tc);
 295                 }
 296                 // restore the simple cut buffer
 297                 buf = simple_cut_clone;
 298         }
 299
 300         return true;
 301 }
 302
 303
 304 int CutAndPaste::nrOfParagraphs()
 305 {
 306         if (!buf)
 307                 return 0;
 308
 309         int n = 1;
 310         Paragraph * tmppar = buf;
 311         while(tmppar->next()) {
 312                 ++n;
 313                 tmppar = tmppar->next();
 314         }
 315         return n;
 316 }
 317
 318
 319 int CutAndPaste::SwitchLayoutsBetweenClasses(LyXTextClassList::size_type c1,
 320                                              LyXTextClassList::size_type c2,
 321                                              Paragraph * par)
 322 {
 323         int ret = 0;
 324         if (!par || c1 == c2)
 325                 return ret;
 326
 327         while (par) {
 328                 string const name = textclasslist.NameOfLayout(c1,
 329                                                                par->layout);
 330                 int lay = 0;
 331                 pair<bool, LyXTextClass::LayoutList::size_type> pp =
 332                         textclasslist.NumberOfLayout(c2, name);
 333                 if (pp.first) {
 334                         lay = pp.second;
 335                 } else { // layout not found
 336                         // use default layout "Standard" (0)
 337                         lay = 0;
 338                 }
 339                 par->layout = lay;
 340
 341                 if (name != textclasslist.NameOfLayout(c2, par->layout)) {
 342                         ++ret;
 343                         string const s = _("Layout had to be changed from\n")
 344                                 + name + _(" to ")
 345                                 + textclasslist.NameOfLayout(c2, par->layout)
 346                                 + _("\nbecause of class conversion from\n")
 347                                 + textclasslist.NameOfClass(c1) + _(" to ")
 348                                 + textclasslist.NameOfClass(c2);
 349                         InsetError * new_inset = new InsetError(s);
 350                         par->insertInset(0, new_inset);
 351                 }
 352                 par = par->next();
 353         }
 354         return ret;
 355 }
 356
 357
 358 bool CutAndPaste::checkPastePossible(Paragraph *)
 359 {
 360         if (!buf) return false;
 361
 362         return true;
 363 }