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