guicast/bcclipboard.C

   1 #include "bcclipboard.h"
   2 #include "bcwindowbase.h"
   3 #include <string.h>
   4
   5 BC_Clipboard::BC_Clipboard(char *display_name) : Thread()
   6 {
   7         Thread::set_synchronous(1);
   8
   9         in_display = BC_WindowBase::init_display(display_name);
  10         out_display = BC_WindowBase::init_display(display_name);
  11         completion_atom = XInternAtom(out_display, "BC_CLOSE_EVENT", False);
  12         primary = XA_PRIMARY;
  13         secondary = XInternAtom(out_display, "CLIPBOARD", False);
  14         targets_atom = XInternAtom(out_display, "TARGETS", False);
  15         in_win = XCreateSimpleWindow(in_display,
  16                                 DefaultRootWindow(in_display),
  17                                 0,
  18                                 0,
  19                                 1,
  20                                 1,
  21                                 0,
  22                                 0,
  23                                 0);
  24         out_win = XCreateSimpleWindow(out_display,
  25                                 DefaultRootWindow(out_display),
  26                                 0,
  27                                 0,
  28                                 1,
  29                                 1,
  30                                 0,
  31                                 0,
  32                                 0);
  33         data[0] = 0;
  34         data[1] = 0;
  35 }
  36
  37 BC_Clipboard::~BC_Clipboard()
  38 {
  39         if(data[0]) delete [] data[0];
  40         if(data[1]) delete [] data[1];
  41
  42         XDestroyWindow(in_display, in_win);
  43         XCloseDisplay(in_display);
  44         XDestroyWindow(out_display, out_win);
  45         XCloseDisplay(out_display);
  46 }
  47
  48 int BC_Clipboard::start_clipboard()
  49 {
  50         Thread::start();
  51         return 0;
  52 }
  53
  54 int BC_Clipboard::stop_clipboard()
  55 {
  56         XEvent event;
  57         XClientMessageEvent *ptr = (XClientMessageEvent*)&event;
  58
  59         event.type = ClientMessage;
  60         ptr->message_type = completion_atom;
  61         ptr->format = 32;
  62         XSendEvent(out_display, out_win, 0, 0, &event);
  63         XFlush(out_display);
  64         Thread::join();
  65         return 0;
  66 }
  67
  68 void BC_Clipboard::run()
  69 {
  70         XEvent event;
  71         XClientMessageEvent *ptr;
  72         int done = 0;
  73
  74         while(!done)
  75         {
  76 //printf("BC_Clipboard::run 1\n");
  77                 XNextEvent(out_display, &event);
  78 //printf("BC_Clipboard::run 2 %d\n", event.type);
  79
  80                 XLockDisplay(out_display);
  81                 switch(event.type)
  82                 {
  83 // Termination signal
  84                         case ClientMessage:
  85                                 ptr = (XClientMessageEvent*)&event;
  86                                 if(ptr->message_type == completion_atom)
  87                                 {
  88                                         done = 1;
  89                                 }
  90 //printf("ClientMessage %x %x %d\n", ptr->message_type, ptr->data.l[0], primary_atom);
  91                                 break;
  92
  93
  94                         case SelectionRequest:
  95                                 handle_selectionrequest((XSelectionRequestEvent*)&event);
  96                                 break;
  97
  98
  99
 100                         case SelectionClear:
 101                                 if(data[0]) data[0][0] = 0;
 102                                 if(data[1]) data[1][0] = 0;
 103                                 break;
 104                 }
 105                 XUnlockDisplay(out_display);
 106         }
 107 }
 108
 109 void BC_Clipboard::handle_selectionrequest(XSelectionRequestEvent *request)
 110 {
 111         int success = 0;
 112         if (request->target == XA_STRING)
 113                 success = handle_request_string(request);
 114         else if (request->target == targets_atom)
 115                 success = handle_request_targets(request);
 116
 117         XEvent reply;
 118 // 'None' tells the client that the request was denied
 119         reply.xselection.property  = success ? request->property : None;
 120         reply.xselection.type      = SelectionNotify;
 121         reply.xselection.display   = request->display;
 122         reply.xselection.requestor = request->requestor;
 123         reply.xselection.selection = request->selection;
 124         reply.xselection.target    = request->target;
 125         reply.xselection.time      = request->time;
 126
 127
 128         XSendEvent(out_display, request->requestor, 0, 0, &reply);
 129         XFlush(out_display);
 130 //printf("SelectionRequest\n");
 131 }
 132
 133 int BC_Clipboard::handle_request_string(XSelectionRequestEvent *request)
 134 {
 135         char *data_ptr = (request->selection == primary ? data[0] : data[1]);
 136
 137         XChangeProperty(out_display,
 138                         request->requestor,
 139                         request->property,
 140                         XA_STRING,
 141                         8,
 142                         PropModeReplace,
 143                         (unsigned char*)data_ptr,
 144                         strlen(data_ptr));
 145         return 1;
 146 }
 147
 148 int BC_Clipboard::handle_request_targets(XSelectionRequestEvent *request)
 149 {
 150         Atom targets[] = {
 151                 targets_atom,
 152                 XA_STRING
 153         };
 154         XChangeProperty(out_display,
 155                         request->requestor,
 156                         request->property,
 157                         XA_ATOM,
 158                         32,
 159                         PropModeReplace,
 160                         (unsigned char*)targets,
 161                         sizeof(targets)/sizeof(targets[0]));
 162 //printf("BC_Clipboard::handle_request_targets\n");
 163         return 1;
 164 }
 165
 166 int BC_Clipboard::to_clipboard(char *data, long len, int clipboard_num)
 167 {
 168
 169 #if 0
 170         XStoreBuffer(display, data, len, clipboard_num);
 171 #endif
 172
 173         XLockDisplay(out_display);
 174
 175 // Store in local buffer
 176         if(this->data[clipboard_num] && length[clipboard_num] != len + 1)
 177         {
 178                 delete [] this->data[clipboard_num];
 179                 this->data[clipboard_num] = 0;
 180         }
 181
 182         if(!this->data[clipboard_num])
 183         {
 184                 length[clipboard_num] = len;
 185                 this->data[clipboard_num] = new char[len + 1];
 186                 memcpy(this->data[clipboard_num], data, len);
 187                 this->data[clipboard_num][len] = 0;
 188         }
 189
 190         XSetSelectionOwner(out_display,
 191                 (clipboard_num == PRIMARY_SELECTION) ? primary : secondary,
 192                 out_win,
 193                 CurrentTime);
 194
 195         XFlush(out_display);
 196
 197         XUnlockDisplay(out_display);
 198         return 0;
 199 }
 200
 201 int BC_Clipboard::from_clipboard(char *data, long maxlen, int clipboard_num)
 202 {
 203
 204
 205
 206 #if 0
 207         char *data2;
 208         int len, i;
 209         data2 = XFetchBuffer(display, &len, clipboard_num);
 210         for(i = 0; i < len && i < maxlen; i++)
 211                 data[i] = data2[i];
 212
 213         data[i] = 0;
 214
 215         XFree(data2);
 216
 217 #endif
 218
 219
 220         XLockDisplay(in_display);
 221
 222         XEvent event;
 223     Atom type_return, pty;
 224     int format;
 225     unsigned long nitems, size, new_size, total;
 226         char *temp_data = 0;
 227
 228     pty = (clipboard_num == PRIMARY_SELECTION) ? primary : secondary;
 229                                                 /* a property of our window
 230                                                    for apps to put their
 231                                                    selection into */
 232
 233         XConvertSelection(in_display,
 234                 clipboard_num == PRIMARY_SELECTION ? primary : secondary,
 235                 XA_STRING,
 236                 pty,
 237         in_win,
 238                 CurrentTime);
 239
 240         data[0] = 0;
 241         do
 242         {
 243                 XNextEvent(in_display, &event);
 244         }while(event.type != SelectionNotify && event.type != None);
 245
 246         if(event.type != None)
 247         {
 248 // Get size
 249         XGetWindowProperty(in_display,
 250                 in_win,
 251                 pty,
 252                 0,
 253                 0,
 254                 False,
 255                 AnyPropertyType,
 256                 &type_return,
 257                 &format,
 258                 &nitems,
 259                 &size,
 260                 (unsigned char**)&temp_data);
 261
 262         if(temp_data) XFree(temp_data);
 263         temp_data = 0;
 264
 265 // Get data
 266         XGetWindowProperty(in_display,
 267                 in_win,
 268                 pty,
 269                 0,
 270                 size,
 271                 False,
 272                 AnyPropertyType,
 273                 &type_return,
 274                 &format,
 275                 &nitems,
 276                 &new_size,
 277                 (unsigned char**)&temp_data);
 278
 279
 280                 if(type_return && temp_data)
 281                 {
 282                         strncpy(data, temp_data, maxlen);
 283                         data[size] = 0;
 284                 }
 285                 else
 286                         data[0] = 0;
 287
 288                 if(temp_data) XFree(temp_data);
 289         }
 290
 291         XUnlockDisplay(in_display);
 292
 293         return 0;
 294 }
 295
 296 long BC_Clipboard::clipboard_len(int clipboard_num)
 297 {
 298
 299 #if 0
 300         char *data2;
 301         int len;
 302
 303         data2 = XFetchBuffer(display, &len, clipboard_num);
 304         XFree(data2);
 305         return len;
 306 #endif
 307
 308
 309
 310         XLockDisplay(in_display);
 311
 312         XEvent event;
 313     Atom type_return, pty;
 314     int format;
 315     unsigned long nitems, pty_size, total;
 316         char *temp_data = 0;
 317         int result = 0;
 318
 319     pty = (clipboard_num == PRIMARY_SELECTION) ? primary : secondary;
 320                                                 /* a property of our window
 321                                                    for apps to put their
 322                                                    selection into */
 323         XConvertSelection(in_display,
 324                 (clipboard_num == PRIMARY_SELECTION) ? primary : secondary,
 325                 XA_STRING,
 326                 pty,
 327         in_win,
 328                 CurrentTime);
 329
 330         do
 331         {
 332                 XNextEvent(in_display, &event);
 333         }while(event.type != SelectionNotify && event.type != None);
 334
 335         if(event.type != None)
 336         {
 337 // Get size
 338         XGetWindowProperty(in_display,
 339                 in_win,
 340                 pty,
 341                 0,
 342                 0,
 343                 False,
 344                 AnyPropertyType,
 345                 &type_return,
 346                 &format,
 347                 &nitems,
 348                 &pty_size,
 349                 (unsigned char**)&temp_data);
 350
 351                 if(type_return)
 352                 {
 353                         result = pty_size + 1;
 354                 }
 355                 else
 356                         result = 0;
 357
 358
 359
 360                 if(temp_data)
 361                         XFree(temp_data);
 362
 363         }
 364
 365         XUnlockDisplay(in_display);
 366
 367         return result;
 368 }