San Mehat | a430b2b | 2014-09-23 08:30:51 -0700 | [diff] [blame] | 1 | /* Handle clipboard text and data in arbitrary formats */ |
| 2 | |
| 3 | #include <stdio.h> |
| 4 | #include <limits.h> |
| 5 | |
| 6 | #ifdef WIN32 |
| 7 | #include <SDL.h> |
| 8 | #include <SDL_syswm.h> |
| 9 | #else |
| 10 | #include <SDL/SDL.h> |
| 11 | #include <SDL/SDL_syswm.h> |
| 12 | #endif |
| 13 | #include "scrap.h" |
| 14 | #include "rfb/rfbconfig.h" |
| 15 | |
| 16 | /* Determine what type of clipboard we are using */ |
| 17 | #if defined(__unix__) && !defined(__QNXNTO__) && defined(LIBVNCSERVER_HAVE_X11) |
| 18 | #define X11_SCRAP |
| 19 | #elif defined(__WIN32__) |
| 20 | #define WIN_SCRAP |
| 21 | #elif defined(__QNXNTO__) |
| 22 | #define QNX_SCRAP |
| 23 | #else |
| 24 | #warning Unknown window manager for clipboard handling |
| 25 | #endif /* scrap type */ |
| 26 | |
| 27 | /* System dependent data types */ |
| 28 | #if defined(X11_SCRAP) |
| 29 | typedef Atom scrap_type; |
| 30 | static Atom XA_TARGETS, XA_TEXT, XA_COMPOUND_TEXT, XA_UTF8_STRING; |
| 31 | #elif defined(WIN_SCRAP) |
| 32 | typedef UINT scrap_type; |
| 33 | #elif defined(QNX_SCRAP) |
| 34 | typedef uint32_t scrap_type; |
| 35 | #define Ph_CL_TEXT T('T', 'E', 'X', 'T') |
| 36 | #else |
| 37 | typedef int scrap_type; |
| 38 | #endif /* scrap type */ |
| 39 | |
| 40 | /* System dependent variables */ |
| 41 | #if defined(X11_SCRAP) |
| 42 | static Display *SDL_Display; |
| 43 | static Window SDL_Window; |
| 44 | static void (*Lock_Display)(void); |
| 45 | static void (*Unlock_Display)(void); |
| 46 | static Atom XA_UTF8_STRING; |
| 47 | #elif defined(WIN_SCRAP) |
| 48 | static HWND SDL_Window; |
| 49 | #elif defined(QNX_SCRAP) |
| 50 | static unsigned short InputGroup; |
| 51 | #endif /* scrap type */ |
| 52 | |
| 53 | #define FORMAT_PREFIX "SDL_scrap_0x" |
| 54 | |
| 55 | static scrap_type convert_format(int type) |
| 56 | { |
| 57 | switch (type) { |
| 58 | case T('T', 'E', 'X', 'T'): |
| 59 | #if defined(X11_SCRAP) |
| 60 | return XA_UTF8_STRING ? XA_UTF8_STRING : XA_STRING; |
| 61 | #elif defined(WIN_SCRAP) |
| 62 | return CF_TEXT; |
| 63 | #elif defined(QNX_SCRAP) |
| 64 | return Ph_CL_TEXT; |
| 65 | #endif /* scrap type */ |
| 66 | default: |
| 67 | { |
| 68 | char format[sizeof(FORMAT_PREFIX)+8+1]; |
| 69 | |
| 70 | sprintf(format, "%s%08lx", FORMAT_PREFIX, |
| 71 | (unsigned long)type); |
| 72 | #if defined(X11_SCRAP) |
| 73 | return XInternAtom(SDL_Display, format, False); |
| 74 | #elif defined(WIN_SCRAP) |
| 75 | return RegisterClipboardFormat(format); |
| 76 | #endif /* scrap type */ |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | /* Convert internal data to scrap format */ |
| 82 | static int convert_data(int type, char *dst, const char *src, int srclen) |
| 83 | { |
| 84 | int dstlen; |
| 85 | |
| 86 | dstlen = 0; |
| 87 | switch (type) { |
| 88 | case T('T', 'E', 'X', 'T'): |
| 89 | if (dst) { |
| 90 | while (--srclen >= 0) { |
| 91 | #if defined(__unix__) |
| 92 | if (*src == '\r') { |
| 93 | *dst++ = '\n'; |
| 94 | ++dstlen; |
| 95 | } |
| 96 | else |
| 97 | #elif defined(__WIN32__) |
| 98 | if (*src == '\r') { |
| 99 | *dst++ = '\r'; |
| 100 | ++dstlen; |
| 101 | *dst++ = '\n'; |
| 102 | ++dstlen; |
| 103 | } |
| 104 | else |
| 105 | #endif |
| 106 | { |
| 107 | *dst++ = *src; |
| 108 | ++dstlen; |
| 109 | } |
| 110 | ++src; |
| 111 | } |
| 112 | *dst = '\0'; |
| 113 | ++dstlen; |
| 114 | } |
| 115 | else { |
| 116 | while (--srclen >= 0) { |
| 117 | #if defined(__unix__) |
| 118 | if (*src == '\r') |
| 119 | ++dstlen; |
| 120 | else |
| 121 | #elif defined(__WIN32__) |
| 122 | if (*src == '\r') { |
| 123 | ++dstlen; |
| 124 | ++dstlen; |
| 125 | } |
| 126 | else |
| 127 | #endif |
| 128 | { |
| 129 | ++dstlen; |
| 130 | } |
| 131 | ++src; |
| 132 | } |
| 133 | ++dstlen; |
| 134 | } |
| 135 | break; |
| 136 | default: |
| 137 | if (dst) { |
| 138 | *(int *)dst = srclen; |
| 139 | dst += sizeof(int); |
| 140 | memcpy(dst, src, srclen); |
| 141 | } |
| 142 | dstlen = sizeof(int)+srclen; |
| 143 | break; |
| 144 | } |
| 145 | return(dstlen); |
| 146 | } |
| 147 | |
| 148 | /* Convert scrap data to internal format */ |
| 149 | static int convert_scrap(int type, char *dst, char *src, int srclen) |
| 150 | { |
| 151 | int dstlen; |
| 152 | |
| 153 | dstlen = 0; |
| 154 | switch (type) { |
| 155 | case T('T', 'E', 'X', 'T'): |
| 156 | { |
| 157 | if (srclen == 0) |
| 158 | srclen = strlen(src); |
| 159 | if (dst) { |
| 160 | while (--srclen >= 0) { |
| 161 | #if defined(__WIN32__) |
| 162 | if (*src == '\r') |
| 163 | /* drop extraneous '\r' */; |
| 164 | else |
| 165 | #endif |
| 166 | if (*src == '\n') { |
| 167 | *dst++ = '\r'; |
| 168 | ++dstlen; |
| 169 | } |
| 170 | else { |
| 171 | *dst++ = *src; |
| 172 | ++dstlen; |
| 173 | } |
| 174 | ++src; |
| 175 | } |
| 176 | *dst = '\0'; |
| 177 | ++dstlen; |
| 178 | } |
| 179 | else { |
| 180 | while (--srclen >= 0) { |
| 181 | #if defined(__WIN32__) |
| 182 | /* drop extraneous '\r' */; |
| 183 | if (*src != '\r') |
| 184 | #endif |
| 185 | ++dstlen; |
| 186 | ++src; |
| 187 | } |
| 188 | ++dstlen; |
| 189 | } |
| 190 | break; |
| 191 | } |
| 192 | default: |
| 193 | dstlen = *(int *)src; |
| 194 | if (dst) |
| 195 | memcpy(dst, src + sizeof(int), |
| 196 | srclen ? srclen - sizeof(int) : dstlen); |
| 197 | break; |
| 198 | } |
| 199 | return dstlen; |
| 200 | } |
| 201 | |
| 202 | int init_scrap(void) |
| 203 | { |
| 204 | SDL_SysWMinfo info; |
| 205 | int retval; |
| 206 | |
| 207 | /* Grab the window manager specific information */ |
| 208 | retval = -1; |
| 209 | SDL_SetError("SDL is not running on known window manager"); |
| 210 | |
| 211 | SDL_VERSION(&info.version); |
| 212 | if (SDL_GetWMInfo(&info)) { |
| 213 | /* Save the information for later use */ |
| 214 | #if defined(X11_SCRAP) |
| 215 | if (info.subsystem == SDL_SYSWM_X11) { |
| 216 | SDL_Display = info.info.x11.display; |
| 217 | SDL_Window = info.info.x11.window; |
| 218 | Lock_Display = info.info.x11.lock_func; |
| 219 | Unlock_Display = info.info.x11.unlock_func; |
| 220 | |
| 221 | /* Enable the special window hook events */ |
| 222 | SDL_EventState(SDL_SYSWMEVENT, SDL_ENABLE); |
| 223 | SDL_SetEventFilter(clipboard_filter); |
| 224 | |
| 225 | XA_TARGETS = XInternAtom(SDL_Display, "TARGETS", False); |
| 226 | XA_TEXT = XInternAtom(SDL_Display, "TEXT", False); |
| 227 | XA_COMPOUND_TEXT = XInternAtom(SDL_Display, |
| 228 | "COMPOUND_TEXT", False); |
| 229 | XA_UTF8_STRING = XInternAtom(SDL_Display, |
| 230 | "UTF8_STRING", False); |
| 231 | |
| 232 | retval = 0; |
| 233 | } |
| 234 | else |
| 235 | SDL_SetError("SDL is not running on X11"); |
| 236 | #elif defined(WIN_SCRAP) |
| 237 | SDL_Window = info.window; |
| 238 | retval = 0; |
| 239 | #elif defined(QNX_SCRAP) |
| 240 | InputGroup = PhInputGroup(NULL); |
| 241 | retval = 0; |
| 242 | #endif /* scrap type */ |
| 243 | } |
| 244 | return(retval); |
| 245 | } |
| 246 | |
| 247 | int lost_scrap(void) |
| 248 | { |
| 249 | int retval; |
| 250 | |
| 251 | #if defined(X11_SCRAP) |
| 252 | if (Lock_Display) |
| 253 | Lock_Display(); |
| 254 | retval = (XGetSelectionOwner(SDL_Display, XA_PRIMARY) != SDL_Window); |
| 255 | if (Unlock_Display) |
| 256 | Unlock_Display(); |
| 257 | #elif defined(WIN_SCRAP) |
| 258 | retval = (GetClipboardOwner() != SDL_Window); |
| 259 | #elif defined(QNX_SCRAP) |
| 260 | retval = (PhInputGroup(NULL) != InputGroup); |
| 261 | #endif /* scrap type */ |
| 262 | |
| 263 | return(retval); |
| 264 | } |
| 265 | |
| 266 | void put_scrap(int type, int srclen, const char *src) |
| 267 | { |
| 268 | scrap_type format; |
| 269 | int dstlen; |
| 270 | char *dst; |
| 271 | |
| 272 | format = convert_format(type); |
| 273 | dstlen = convert_data(type, NULL, src, srclen); |
| 274 | |
| 275 | #if defined(X11_SCRAP) |
| 276 | dst = (char *)malloc(dstlen); |
| 277 | if (dst != NULL) { |
| 278 | if (Lock_Display) |
| 279 | Lock_Display(); |
| 280 | convert_data(type, dst, src, srclen); |
| 281 | XChangeProperty(SDL_Display, DefaultRootWindow(SDL_Display), |
| 282 | XA_CUT_BUFFER0, format, 8, PropModeReplace, |
| 283 | (unsigned char *)dst, dstlen); |
| 284 | free(dst); |
| 285 | if (lost_scrap()) |
| 286 | XSetSelectionOwner(SDL_Display, XA_PRIMARY, |
| 287 | SDL_Window, CurrentTime); |
| 288 | if (Unlock_Display) |
| 289 | Unlock_Display(); |
| 290 | } |
| 291 | #elif defined(WIN_SCRAP) |
| 292 | if (OpenClipboard(SDL_Window)) { |
| 293 | HANDLE hMem; |
| 294 | |
| 295 | hMem = GlobalAlloc((GMEM_MOVEABLE|GMEM_DDESHARE), dstlen); |
| 296 | if (hMem != NULL) { |
| 297 | dst = (char *)GlobalLock(hMem); |
| 298 | convert_data(type, dst, src, srclen); |
| 299 | GlobalUnlock(hMem); |
| 300 | EmptyClipboard(); |
| 301 | SetClipboardData(format, hMem); |
| 302 | } |
| 303 | CloseClipboard(); |
| 304 | } |
| 305 | #elif defined(QNX_SCRAP) |
| 306 | #if (_NTO_VERSION < 620) /* before 6.2.0 releases */ |
| 307 | #define PhClipboardHdr PhClipHeader |
| 308 | #endif |
| 309 | { |
| 310 | PhClipboardHdr clheader = { Ph_CLIPBOARD_TYPE_TEXT, 0, NULL }; |
| 311 | int* cldata; |
| 312 | int status; |
| 313 | |
| 314 | dst = (char *)malloc(dstlen+4); |
| 315 | if (dst != NULL) { |
| 316 | cldata = (int*)dst; |
| 317 | *cldata = type; |
| 318 | convert_data(type, dst+4, src, srclen); |
| 319 | clheader.data = dst; |
| 320 | #if (_NTO_VERSION < 620) /* before 6.2.0 releases */ |
| 321 | if (dstlen > 65535) |
| 322 | /* maximum photon clipboard size :(*/ |
| 323 | clheader.length = 65535; |
| 324 | else |
| 325 | #endif |
| 326 | clheader.length = dstlen+4; |
| 327 | status = PhClipboardCopy(InputGroup, 1, &clheader); |
| 328 | if (status == -1) |
| 329 | fprintf(stderr, |
| 330 | "Photon: copy to clipboard failed!\n"); |
| 331 | free(dst); |
| 332 | } |
| 333 | } |
| 334 | #endif /* scrap type */ |
| 335 | } |
| 336 | |
| 337 | void get_scrap(int type, int *dstlen, char **dst) |
| 338 | { |
| 339 | scrap_type format; |
| 340 | |
| 341 | *dstlen = 0; |
| 342 | format = convert_format(type); |
| 343 | |
| 344 | #if defined(X11_SCRAP) |
| 345 | { |
| 346 | Window owner; |
| 347 | Atom selection; |
| 348 | Atom seln_type; |
| 349 | int seln_format; |
| 350 | unsigned long nbytes; |
| 351 | unsigned long overflow; |
| 352 | char *src; |
| 353 | |
| 354 | if (Lock_Display) |
| 355 | Lock_Display(); |
| 356 | owner = XGetSelectionOwner(SDL_Display, XA_PRIMARY); |
| 357 | if (Unlock_Display) |
| 358 | Unlock_Display(); |
| 359 | if ((owner == None) || (owner == SDL_Window)) { |
| 360 | owner = DefaultRootWindow(SDL_Display); |
| 361 | selection = XA_CUT_BUFFER0; |
| 362 | } |
| 363 | else { |
| 364 | int selection_response = 0; |
| 365 | SDL_Event event; |
| 366 | |
| 367 | owner = SDL_Window; |
| 368 | if (Lock_Display) |
| 369 | Lock_Display(); |
| 370 | selection = XInternAtom(SDL_Display, "SDL_SELECTION", |
| 371 | False); |
| 372 | XConvertSelection(SDL_Display, XA_PRIMARY, format, |
| 373 | selection, owner, CurrentTime); |
| 374 | if (Unlock_Display) |
| 375 | Unlock_Display(); |
| 376 | while (!selection_response) { |
| 377 | SDL_WaitEvent(&event); |
| 378 | if (event.type == SDL_SYSWMEVENT) { |
| 379 | XEvent xevent = |
| 380 | event.syswm.msg->event.xevent; |
| 381 | |
| 382 | if ((xevent.type == SelectionNotify) && |
| 383 | (xevent.xselection.requestor |
| 384 | == owner)) |
| 385 | selection_response = 1; |
| 386 | } |
| 387 | } |
| 388 | } |
| 389 | if (Lock_Display) |
| 390 | Lock_Display(); |
| 391 | if (XGetWindowProperty(SDL_Display, owner, selection, |
| 392 | 0, INT_MAX/4, False, format, &seln_type, |
| 393 | &seln_format, &nbytes, &overflow, |
| 394 | (unsigned char **)&src) == Success) { |
| 395 | if (seln_type == format) { |
| 396 | *dstlen = convert_scrap(type, NULL, |
| 397 | src, nbytes); |
| 398 | *dst = (char *)realloc(*dst, *dstlen); |
| 399 | if (*dst == NULL) |
| 400 | *dstlen = 0; |
| 401 | else |
| 402 | convert_scrap(type, *dst, src, nbytes); |
| 403 | } |
| 404 | XFree(src); |
| 405 | } |
| 406 | } |
| 407 | if (Unlock_Display) |
| 408 | Unlock_Display(); |
| 409 | #elif defined(WIN_SCRAP) |
| 410 | if (IsClipboardFormatAvailable(format) && OpenClipboard(SDL_Window)) { |
| 411 | HANDLE hMem; |
| 412 | char *src; |
| 413 | |
| 414 | hMem = GetClipboardData(format); |
| 415 | if (hMem != NULL) { |
| 416 | src = (char *)GlobalLock(hMem); |
| 417 | *dstlen = convert_scrap(type, NULL, src, 0); |
| 418 | *dst = (char *)realloc(*dst, *dstlen); |
| 419 | if (*dst == NULL) |
| 420 | *dstlen = 0; |
| 421 | else |
| 422 | convert_scrap(type, *dst, src, 0); |
| 423 | GlobalUnlock(hMem); |
| 424 | } |
| 425 | CloseClipboard(); |
| 426 | } |
| 427 | #elif defined(QNX_SCRAP) |
| 428 | #if (_NTO_VERSION < 620) /* before 6.2.0 releases */ |
| 429 | { |
| 430 | void* clhandle; |
| 431 | PhClipHeader* clheader; |
| 432 | int* cldata; |
| 433 | |
| 434 | clhandle = PhClipboardPasteStart(InputGroup); |
| 435 | if (clhandle != NULL) { |
| 436 | clheader = PhClipboardPasteType(clhandle, |
| 437 | Ph_CLIPBOARD_TYPE_TEXT); |
| 438 | if (clheader != NULL) { |
| 439 | cldata = clheader->data; |
| 440 | if ((clheader->length>4) && (*cldata == type)) { |
| 441 | *dstlen = convert_scrap(type, NULL, |
| 442 | (char*)clheader->data+4, |
| 443 | clheader->length-4); |
| 444 | *dst = (char *)realloc(*dst, *dstlen); |
| 445 | if (*dst == NULL) |
| 446 | *dstlen = 0; |
| 447 | else |
| 448 | convert_scrap(type, *dst, |
| 449 | (char*)clheader->data+4, |
| 450 | clheader->length-4); |
| 451 | } |
| 452 | } |
| 453 | PhClipboardPasteFinish(clhandle); |
| 454 | } |
| 455 | } |
| 456 | #else /* 6.2.0 and 6.2.1 and future releases */ |
| 457 | { |
| 458 | void* clhandle; |
| 459 | PhClipboardHdr* clheader; |
| 460 | int* cldata; |
| 461 | |
| 462 | clheader=PhClipboardRead(InputGroup, Ph_CLIPBOARD_TYPE_TEXT); |
| 463 | if (clheader!=NULL) { |
| 464 | cldata=clheader->data; |
| 465 | if ((clheader->length>4) && (*cldata==type)) { |
| 466 | *dstlen = convert_scrap(type, NULL, |
| 467 | (char*)clheader->data+4, |
| 468 | clheader->length-4); |
| 469 | *dst = (char *)realloc(*dst, *dstlen); |
| 470 | if (*dst == NULL) |
| 471 | *dstlen = 0; |
| 472 | else |
| 473 | convert_scrap(type, *dst, |
| 474 | (char*)clheader->data+4, |
| 475 | clheader->length-4); |
| 476 | } |
| 477 | } |
| 478 | } |
| 479 | #endif |
| 480 | #endif /* scrap type */ |
| 481 | } |
| 482 | |
| 483 | int clipboard_filter(const SDL_Event *event) |
| 484 | { |
| 485 | #if defined(X11_SCRAP) |
| 486 | /* Post all non-window manager specific events */ |
| 487 | if (event->type != SDL_SYSWMEVENT) |
| 488 | return(1); |
| 489 | |
| 490 | /* Handle window-manager specific clipboard events */ |
| 491 | switch (event->syswm.msg->event.xevent.type) { |
| 492 | /* Copy the selection from XA_CUT_BUFFER0 to the requested property */ |
| 493 | case SelectionRequest: { |
| 494 | XSelectionRequestEvent *req; |
| 495 | XEvent sevent; |
| 496 | int seln_format; |
| 497 | unsigned long nbytes; |
| 498 | unsigned long overflow; |
| 499 | unsigned char *seln_data; |
| 500 | |
| 501 | req = &event->syswm.msg->event.xevent.xselectionrequest; |
| 502 | if (req->target == XA_TARGETS) { |
| 503 | Atom supported[] = { |
| 504 | XA_TEXT, XA_COMPOUND_TEXT, XA_UTF8_STRING, |
| 505 | XA_TARGETS, XA_STRING |
| 506 | }; |
| 507 | XEvent response; |
| 508 | |
| 509 | XChangeProperty(SDL_Display, req->requestor, |
| 510 | req->property, req->target, 32, PropModeReplace, |
| 511 | (unsigned char*)supported, |
| 512 | sizeof(supported) / sizeof(supported[0])); |
| 513 | response.xselection.property=None; |
| 514 | response.xselection.type= SelectionNotify; |
| 515 | response.xselection.display= req->display; |
| 516 | response.xselection.requestor= req->requestor; |
| 517 | response.xselection.selection=req->selection; |
| 518 | response.xselection.target= req->target; |
| 519 | response.xselection.time = req->time; |
| 520 | XSendEvent (SDL_Display, req->requestor,0,0,&response); |
| 521 | XFlush (SDL_Display); |
| 522 | return 1; |
| 523 | } |
| 524 | |
| 525 | sevent.xselection.type = SelectionNotify; |
| 526 | sevent.xselection.display = req->display; |
| 527 | sevent.xselection.selection = req->selection; |
| 528 | sevent.xselection.target = None; |
| 529 | sevent.xselection.property = req->property; |
| 530 | sevent.xselection.requestor = req->requestor; |
| 531 | sevent.xselection.time = req->time; |
| 532 | if (XGetWindowProperty(SDL_Display, |
| 533 | DefaultRootWindow(SDL_Display), XA_CUT_BUFFER0, |
| 534 | 0, INT_MAX/4, False, req->target, |
| 535 | &sevent.xselection.target, &seln_format, |
| 536 | &nbytes, &overflow, &seln_data) == Success) { |
| 537 | if (sevent.xselection.target == req->target) { |
| 538 | if (sevent.xselection.target == XA_STRING && |
| 539 | nbytes > 0 && |
| 540 | seln_data[nbytes-1] == '\0') |
| 541 | --nbytes; |
| 542 | XChangeProperty(SDL_Display, req->requestor, |
| 543 | req->property, sevent.xselection.target, |
| 544 | seln_format, PropModeReplace, |
| 545 | seln_data, nbytes); |
| 546 | sevent.xselection.property = req->property; |
| 547 | } |
| 548 | XFree(seln_data); |
| 549 | } |
| 550 | XSendEvent(SDL_Display,req->requestor,False,0,&sevent); |
| 551 | XSync(SDL_Display, False); |
| 552 | break; |
| 553 | } |
| 554 | } |
| 555 | /* Post the event for X11 clipboard reading above */ |
| 556 | #endif /* X11_SCRAP */ |
| 557 | return(1); |
| 558 | } |