cinelerra-5.1/guicast/bcclipboard.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "bcclipboard.h"
  23 #include "bcdisplay.h"
  24 #include "bcresources.h"
  25 #include "bcsignals.h"
  26 #include "bcwindowbase.h"
  27 #include "bcwindowbase.inc"
  28 #include <string.h>
  29 #include <unistd.h>
  30
  31 BC_Clipboard::BC_Clipboard(const char *display_name)
  32  : Thread(1, 0, 0)
  33 {
  34         if(display_name)
  35                 strcpy(this->display_name, display_name);
  36         else
  37                 this->display_name[0] = 0;
  38
  39 #ifdef SINGLE_THREAD
  40         in_display = out_display = BC_Display::get_display(display_name);
  41 #else
  42         in_display = BC_WindowBase::init_display(display_name);
  43         out_display = BC_WindowBase::init_display(display_name);
  44 #endif
  45
  46         completion_atom = XInternAtom(out_display, "BC_CLOSE_EVENT", False);
  47         primary = XA_PRIMARY;
  48         secondary = XInternAtom(out_display, "CLIPBOARD", False);
  49         targets_atom = XInternAtom(out_display, "TARGETS", False);
  50         if(BC_Resources::locale_utf8)
  51                 strtype_atom = XInternAtom(out_display, "UTF8_STRING", False);
  52         else
  53                 strtype_atom = XA_STRING;
  54         in_win = XCreateSimpleWindow(in_display,
  55                                 DefaultRootWindow(in_display),
  56                                 0, 0, 1, 1, 0, 0, 0);
  57         out_win = XCreateSimpleWindow(out_display,
  58                                 DefaultRootWindow(out_display),
  59                                 0, 0, 1, 1, 0, 0, 0);
  60         data[0] = 0;
  61         data[1] = 0;
  62 }
  63
  64 BC_Clipboard::~BC_Clipboard()
  65 {
  66         if(data[0]) delete [] data[0];
  67         if(data[1]) delete [] data[1];
  68
  69         XDestroyWindow(in_display, in_win);
  70         XCloseDisplay(in_display);
  71         XDestroyWindow(out_display, out_win);
  72         XCloseDisplay(out_display);
  73 }
  74
  75 int BC_Clipboard::start_clipboard()
  76 {
  77 #ifndef SINGLE_THREAD
  78         Thread::start();
  79 #endif
  80         return 0;
  81 }
  82
  83 int BC_Clipboard::stop_clipboard()
  84 {
  85 #ifdef SINGLE_THREAD
  86         XFlush(in_display);
  87 #else
  88         XFlush(in_display);
  89         XFlush(out_display);
  90 #endif
  91 // Must use a different display handle to send events.
  92         Display *display = BC_WindowBase::init_display(display_name);
  93         XEvent event;  memset(&event, 0, sizeof(event));
  94         XClientMessageEvent *ptr = (XClientMessageEvent*)&event;
  95
  96         event.type = ClientMessage;
  97         ptr->message_type = completion_atom;
  98         ptr->format = 32;
  99 //printf("BC_Clipboard::stop_clipboard %d\n", __LINE__);
 100         XSendEvent(display, out_win, 0, 0, &event);
 101         XFlush(display);
 102         XCloseDisplay(display);
 103
 104         Thread::join();
 105         return 0;
 106 }
 107
 108 void BC_Clipboard::run()
 109 {
 110         XEvent event;
 111         XClientMessageEvent *ptr;
 112         int done = 0;
 113 #ifndef SINGLE_THREAD
 114         int x_fd = ConnectionNumber(out_display);
 115 #endif
 116
 117         while(!done)
 118         {
 119 #ifndef SINGLE_THREAD
 120 // see bcwindowevents.C regarding XNextEvent
 121                 fd_set x_fds;
 122                 FD_ZERO(&x_fds);
 123                 FD_SET(x_fd, &x_fds);
 124                 struct timeval tv;
 125                 tv.tv_sec = 0;  tv.tv_usec = 200000;
 126                 select(x_fd + 1, &x_fds, 0, 0, &tv);
 127                 XLockDisplay(out_display);
 128
 129                 while(XPending(out_display))
 130                 {
 131 #endif
 132 //printf("BC_Clipboard::run 1\n");
 133                         XNextEvent(out_display, &event);
 134 //printf("BC_Clipboard::run 2 %d\n", event.type);
 135
 136 #ifdef SINGLE_THREAD
 137                         BC_Display::lock_display("BC_Clipboard::run");
 138 #endif
 139                         switch(event.type)
 140                         {
 141 // Termination signal
 142                         case ClientMessage:
 143                                 ptr = (XClientMessageEvent*)&event;
 144                                 if(ptr->message_type == completion_atom)
 145                                 {
 146                                         done = 1;
 147                                 }
 148 //printf("ClientMessage %x %x %d\n", ptr->message_type, ptr->data.l[0], primary_atom);
 149                                 break;
 150
 151
 152                         case SelectionRequest:
 153                                 handle_selectionrequest((XSelectionRequestEvent*)&event);
 154                                 break;
 155
 156                         case SelectionClear:
 157                                 if(data[0]) data[0][0] = 0;
 158                                 if(data[1]) data[1][0] = 0;
 159                                 break;
 160                         }
 161 #ifndef SINGLE_THREAD
 162                 }
 163                 XUnlockDisplay(out_display);
 164 #else
 165                 BC_Display::unlock_display();
 166 #endif
 167         }
 168 }
 169
 170 void BC_Clipboard::handle_selectionrequest(XSelectionRequestEvent *request)
 171 {
 172         int success = 0;
 173         if (request->target == strtype_atom)
 174                 success = handle_request_string(request);
 175         else if (request->target == targets_atom)
 176                 success = handle_request_targets(request);
 177
 178         XEvent reply;  memset(&reply, 0, sizeof(reply));
 179 // 'None' tells the client that the request was denied
 180         reply.xselection.property  = success ? request->property : None;
 181         reply.xselection.type      = SelectionNotify;
 182         reply.xselection.display   = request->display;
 183         reply.xselection.requestor = request->requestor;
 184         reply.xselection.selection = request->selection;
 185         reply.xselection.target    = request->target;
 186         reply.xselection.time      = request->time;
 187
 188
 189         XSendEvent(out_display, request->requestor, 0, 0, &reply);
 190         XFlush(out_display);
 191 //printf("SelectionRequest\n");
 192 }
 193
 194 int BC_Clipboard::handle_request_string(XSelectionRequestEvent *request)
 195 {
 196         char *data_ptr = (request->selection == primary ? data[0] : data[1]);
 197
 198         XChangeProperty(out_display,
 199                         request->requestor,
 200                         request->property,
 201                         strtype_atom,
 202                         8,
 203                         PropModeReplace,
 204                         (unsigned char*)data_ptr,
 205                         strlen(data_ptr));
 206         return 1;
 207 }
 208
 209 int BC_Clipboard::handle_request_targets(XSelectionRequestEvent *request)
 210 {
 211         Atom targets[] = {
 212                 targets_atom,
 213                 strtype_atom
 214         };
 215         XChangeProperty(out_display,
 216                         request->requestor,
 217                         request->property,
 218                         XA_ATOM,
 219                         32,
 220                         PropModeReplace,
 221                         (unsigned char*)targets,
 222                         sizeof(targets)/sizeof(targets[0]));
 223 //printf("BC_Clipboard::handle_request_targets\n");
 224         return 1;
 225 }
 226
 227 int BC_Clipboard::to_clipboard(const char *data, long len, int clipboard_num)
 228 {
 229 //printf("BC_Clipboard::to_clipboard %d: %d '%*.*s'\n",clipboard_num,len,len,len,data);
 230         if(clipboard_num == BC_PRIMARY_SELECTION)
 231         {
 232                 XStoreBuffer(out_display, data, len, clipboard_num);
 233                 return 0;
 234         }
 235
 236 #ifdef SINGLE_THREAD
 237         BC_Display::lock_display("BC_Clipboard::to_clipboard");
 238 #else
 239         XLockDisplay(out_display);
 240 #endif
 241
 242 // Store in local buffer
 243         if(this->data[clipboard_num] && length[clipboard_num] != len + 1)
 244         {
 245                 delete [] this->data[clipboard_num];
 246                 this->data[clipboard_num] = 0;
 247         }
 248
 249         if(!this->data[clipboard_num])
 250         {
 251                 length[clipboard_num] = len;
 252                 this->data[clipboard_num] = new char[len + 1];
 253                 memcpy(this->data[clipboard_num], data, len);
 254                 this->data[clipboard_num][len] = 0;
 255         }
 256
 257         if(clipboard_num == PRIMARY_SELECTION)
 258         {
 259                 XSetSelectionOwner(out_display,
 260                         primary,
 261                         out_win,
 262                         CurrentTime);
 263         }
 264         else
 265         if(clipboard_num == SECONDARY_SELECTION)
 266         {
 267                 XSetSelectionOwner(out_display,
 268                         secondary,
 269                         out_win,
 270                         CurrentTime);
 271         }
 272
 273
 274         XFlush(out_display);
 275
 276
 277 #ifdef SINGLE_THREAD
 278         BC_Display::unlock_display();
 279 #else
 280         XUnlockDisplay(out_display);
 281 #endif
 282         return 0;
 283 }
 284
 285 int BC_Clipboard::from_clipboard(char *data, long maxlen, int clipboard_num)
 286 {
 287
 288
 289
 290         if(clipboard_num == BC_PRIMARY_SELECTION)
 291         {
 292                 char *data2;
 293                 int len, i;
 294                 data2 = XFetchBuffer(in_display, &len, clipboard_num);
 295                 for(i = 0; i < len && i < maxlen; i++)
 296                         data[i] = data2[i];
 297
 298                 data[i] = 0;
 299
 300                 XFree(data2);
 301
 302
 303                 return 0;
 304         }
 305
 306
 307
 308 #ifdef SINGLE_THREAD
 309         BC_Display::lock_display("BC_Clipboard::from_clipboard");
 310 #else
 311         XLockDisplay(in_display);
 312 #endif
 313
 314         XEvent event;
 315         Atom type_return, pty;
 316         int format;
 317         unsigned long nitems, size, new_size;
 318         char *temp_data = 0;
 319
 320         pty = (clipboard_num == PRIMARY_SELECTION) ? primary : secondary;
 321                                                 /* a property of our window
 322                                                    for apps to put their
 323                                                    selection into */
 324
 325         XConvertSelection(in_display,
 326                 clipboard_num == PRIMARY_SELECTION ? primary : secondary,
 327                 strtype_atom,
 328                 pty,
 329                 in_win,
 330                 CurrentTime);
 331
 332         data[0] = 0;
 333         do
 334         {
 335                 XNextEvent(in_display, &event);
 336         }while(event.type != SelectionNotify && event.type != None);
 337
 338         if(event.type != None)
 339         {
 340 // Get size
 341                 XGetWindowProperty(in_display,
 342                         in_win, pty, 0, 0, False, AnyPropertyType,
 343                         &type_return, &format, &nitems, &size,
 344                         (unsigned char**)&temp_data);
 345
 346                 if(temp_data) XFree(temp_data);
 347                 temp_data = 0;
 348
 349 // Get data
 350                 XGetWindowProperty(in_display,
 351                         in_win, pty, 0, size, False, AnyPropertyType,
 352                         &type_return, &format, &nitems, &new_size,
 353                         (unsigned char**)&temp_data);
 354
 355
 356                 if(type_return && temp_data)
 357                 {
 358                         strncpy(data, temp_data, maxlen);
 359                         data[maxlen] = 0;
 360                 }
 361                 else
 362                         data[0] = 0;
 363
 364                 if(temp_data) XFree(temp_data);
 365         }
 366
 367
 368 #ifdef SINGLE_THREAD
 369         BC_Display::unlock_display();
 370 #else
 371         XUnlockDisplay(in_display);
 372 #endif
 373
 374         return 0;
 375 }
 376
 377 long BC_Clipboard::clipboard_len(int clipboard_num)
 378 {
 379
 380         if(clipboard_num == BC_PRIMARY_SELECTION)
 381         {
 382                 char *data2;
 383                 int len;
 384
 385                 data2 = XFetchBuffer(in_display, &len, clipboard_num);
 386                 XFree(data2);
 387                 return len;
 388         }
 389
 390
 391
 392
 393 #ifdef SINGLE_THREAD
 394         BC_Display::lock_display("BC_Clipboard::clipboard_len");
 395 #else
 396         XLockDisplay(in_display);
 397 #endif
 398
 399         XEvent event;
 400         Atom type_return, pty;
 401         int format;
 402         unsigned long nitems, pty_size;
 403         char *temp_data = 0;
 404         int result = 0;
 405
 406         pty = (clipboard_num == PRIMARY_SELECTION) ? primary : secondary;
 407                                                 /* a property of our window
 408                                                    for apps to put their
 409                                                    selection into */
 410         XConvertSelection(in_display,
 411                 (clipboard_num == PRIMARY_SELECTION) ? primary : secondary,
 412                 strtype_atom, pty, in_win, CurrentTime);
 413
 414         do
 415         {
 416                 XNextEvent(in_display, &event);
 417         }while(event.type != SelectionNotify && event.type != None);
 418
 419         if(event.type != None)
 420         {
 421 // Get size
 422         XGetWindowProperty(in_display,
 423                 in_win, pty, 0, 0, False, AnyPropertyType,
 424                 &type_return, &format, &nitems, &pty_size,
 425                 (unsigned char**)&temp_data);
 426
 427                 if(type_return)
 428                 {
 429                         result = pty_size + 1;
 430                 }
 431                 else
 432                         result = 0;
 433
 434                 if(temp_data)
 435                         XFree(temp_data);
 436         }
 437
 438
 439 #ifdef SINGLE_THREAD
 440         BC_Display::unlock_display();
 441 #else
 442         XUnlockDisplay(in_display);
 443 #endif
 444
 445         return result;
 446 }