| 1 | /* |
| 2 | *Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved. |
| 3 | *Copyright (C) Colin Harrison 2005-2008 |
| 4 | * |
| 5 | *Permission is hereby granted, free of charge, to any person obtaining |
| 6 | * a copy of this software and associated documentation files (the |
| 7 | *"Software"), to deal in the Software without restriction, including |
| 8 | *without limitation the rights to use, copy, modify, merge, publish, |
| 9 | *distribute, sublicense, and/or sell copies of the Software, and to |
| 10 | *permit persons to whom the Software is furnished to do so, subject to |
| 11 | *the following conditions: |
| 12 | * |
| 13 | *The above copyright notice and this permission notice shall be |
| 14 | *included in all copies or substantial portions of the Software. |
| 15 | * |
| 16 | *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 17 | *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 18 | *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 19 | *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR |
| 20 | *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF |
| 21 | *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| 22 | *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | *Except as contained in this notice, the name of the copyright holder(s) |
| 25 | *and author(s) shall not be used in advertising or otherwise to promote |
| 26 | *the sale, use or other dealings in this Software without prior written |
| 27 | *authorization from the copyright holder(s) and author(s). |
| 28 | * |
| 29 | * Authors: Harold L Hunt II |
| 30 | * Colin Harrison |
| 31 | */ |
| 32 | |
| 33 | #ifdef HAVE_XWIN_CONFIG_H |
| 34 | #include <xwin-config.h> |
| 35 | #endif |
| 36 | #include <sys/types.h> |
| 37 | #include <sys/time.h> |
| 38 | #include "winclipboard.h" |
| 39 | #include "misc.h" |
| 40 | |
| 41 | /* |
| 42 | * Constants |
| 43 | */ |
| 44 | |
| 45 | #define WIN_POLL_TIMEOUT 1 |
| 46 | |
| 47 | /* |
| 48 | * References to external symbols |
| 49 | */ |
| 50 | |
| 51 | extern void *g_pClipboardDisplay; |
| 52 | extern Window g_iClipboardWindow; |
| 53 | extern Atom g_atomLastOwnedSelection; |
| 54 | |
| 55 | /* |
| 56 | * Process X events up to specified timeout |
| 57 | */ |
| 58 | |
| 59 | static int |
| 60 | winProcessXEventsTimeout(HWND hwnd, int iWindow, Display * pDisplay, |
| 61 | Bool fUseUnicode, int iTimeoutSec) |
| 62 | { |
| 63 | int iConnNumber; |
| 64 | struct timeval tv; |
| 65 | int iReturn; |
| 66 | DWORD dwStopTime = GetTickCount() + iTimeoutSec * 1000; |
| 67 | |
| 68 | winDebug("winProcessXEventsTimeout () - pumping X events for %d seconds\n", |
| 69 | iTimeoutSec); |
| 70 | |
| 71 | /* Get our connection number */ |
| 72 | iConnNumber = ConnectionNumber(pDisplay); |
| 73 | |
| 74 | /* Loop for X events */ |
| 75 | while (1) { |
| 76 | fd_set fdsRead; |
| 77 | long remainingTime; |
| 78 | |
| 79 | /* We need to ensure that all pending events are processed */ |
| 80 | XSync(pDisplay, FALSE); |
| 81 | |
| 82 | /* Setup the file descriptor set */ |
| 83 | FD_ZERO(&fdsRead); |
| 84 | FD_SET(iConnNumber, &fdsRead); |
| 85 | |
| 86 | /* Adjust timeout */ |
| 87 | remainingTime = dwStopTime - GetTickCount(); |
| 88 | tv.tv_sec = remainingTime / 1000; |
| 89 | tv.tv_usec = (remainingTime % 1000) * 1000; |
| 90 | winDebug("winProcessXEventsTimeout () - %d milliseconds left\n", |
| 91 | remainingTime); |
| 92 | |
| 93 | /* Break out if no time left */ |
| 94 | if (remainingTime <= 0) |
| 95 | return WIN_XEVENTS_SUCCESS; |
| 96 | |
| 97 | /* Wait for an X event */ |
| 98 | iReturn = select(iConnNumber + 1, /* Highest fds number */ |
| 99 | &fdsRead, /* Read mask */ |
| 100 | NULL, /* No write mask */ |
| 101 | NULL, /* No exception mask */ |
| 102 | &tv); /* Timeout */ |
| 103 | if (iReturn < 0) { |
| 104 | ErrorF("winProcessXEventsTimeout - Call to select () failed: %d. " |
| 105 | "Bailing.\n", iReturn); |
| 106 | break; |
| 107 | } |
| 108 | |
| 109 | /* Branch on which descriptor became active */ |
| 110 | if (FD_ISSET(iConnNumber, &fdsRead)) { |
| 111 | /* Process X events */ |
| 112 | /* Exit when we see that server is shutting down */ |
| 113 | iReturn = winClipboardFlushXEvents(hwnd, |
| 114 | iWindow, pDisplay, fUseUnicode); |
| 115 | |
| 116 | winDebug |
| 117 | ("winProcessXEventsTimeout () - winClipboardFlushXEvents returned %d\n", |
| 118 | iReturn); |
| 119 | |
| 120 | if (WIN_XEVENTS_NOTIFY == iReturn) { |
| 121 | /* Bail out if notify processed */ |
| 122 | return iReturn; |
| 123 | } |
| 124 | } |
| 125 | else { |
| 126 | winDebug("winProcessXEventsTimeout - Spurious wake\n"); |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | return WIN_XEVENTS_SUCCESS; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * Process a given Windows message |
| 135 | */ |
| 136 | |
| 137 | LRESULT CALLBACK |
| 138 | winClipboardWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) |
| 139 | { |
| 140 | static HWND s_hwndNextViewer; |
| 141 | static Bool s_fCBCInitialized; |
| 142 | |
| 143 | /* Branch on message type */ |
| 144 | switch (message) { |
| 145 | case WM_DESTROY: |
| 146 | { |
| 147 | winDebug("winClipboardWindowProc - WM_DESTROY\n"); |
| 148 | |
| 149 | /* Remove ourselves from the clipboard chain */ |
| 150 | ChangeClipboardChain(hwnd, s_hwndNextViewer); |
| 151 | |
| 152 | s_hwndNextViewer = NULL; |
| 153 | |
| 154 | PostQuitMessage(0); |
| 155 | } |
| 156 | return 0; |
| 157 | |
| 158 | case WM_CREATE: |
| 159 | { |
| 160 | HWND first, next; |
| 161 | DWORD error_code = 0; |
| 162 | |
| 163 | winDebug("winClipboardWindowProc - WM_CREATE\n"); |
| 164 | |
| 165 | first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ |
| 166 | if (first == hwnd) |
| 167 | return 0; /* Make sure it's not us! */ |
| 168 | /* Add ourselves to the clipboard viewer chain */ |
| 169 | next = SetClipboardViewer(hwnd); |
| 170 | error_code = GetLastError(); |
| 171 | if (SUCCEEDED(error_code) && (next == first)) /* SetClipboardViewer must have succeeded, and the handle */ |
| 172 | s_hwndNextViewer = next; /* it returned must have been the first window in the chain */ |
| 173 | else |
| 174 | s_fCBCInitialized = FALSE; |
| 175 | } |
| 176 | return 0; |
| 177 | |
| 178 | case WM_CHANGECBCHAIN: |
| 179 | { |
| 180 | winDebug("winClipboardWindowProc - WM_CHANGECBCHAIN: wParam(%x) " |
| 181 | "lParam(%x) s_hwndNextViewer(%x)\n", |
| 182 | wParam, lParam, s_hwndNextViewer); |
| 183 | |
| 184 | if ((HWND) wParam == s_hwndNextViewer) { |
| 185 | s_hwndNextViewer = (HWND) lParam; |
| 186 | if (s_hwndNextViewer == hwnd) { |
| 187 | s_hwndNextViewer = NULL; |
| 188 | winErrorFVerb(1, "winClipboardWindowProc - WM_CHANGECBCHAIN: " |
| 189 | "attempted to set next window to ourselves."); |
| 190 | } |
| 191 | } |
| 192 | else if (s_hwndNextViewer) |
| 193 | SendMessage(s_hwndNextViewer, message, wParam, lParam); |
| 194 | |
| 195 | } |
| 196 | winDebug("winClipboardWindowProc - WM_CHANGECBCHAIN: Exit\n"); |
| 197 | return 0; |
| 198 | |
| 199 | case WM_WM_REINIT: |
| 200 | { |
| 201 | /* Ensure that we're in the clipboard chain. Some apps, |
| 202 | * WinXP's remote desktop for one, don't play nice with the |
| 203 | * chain. This message is called whenever we receive a |
| 204 | * WM_ACTIVATEAPP message to ensure that we continue to |
| 205 | * receive clipboard messages. |
| 206 | * |
| 207 | * It might be possible to detect if we're still in the chain |
| 208 | * by calling SendMessage (GetClipboardViewer(), |
| 209 | * WM_DRAWCLIPBOARD, 0, 0); and then seeing if we get the |
| 210 | * WM_DRAWCLIPBOARD message. That, however, might be more |
| 211 | * expensive than just putting ourselves back into the chain. |
| 212 | */ |
| 213 | |
| 214 | HWND first, next; |
| 215 | DWORD error_code = 0; |
| 216 | |
| 217 | winDebug("winClipboardWindowProc - WM_WM_REINIT: Enter\n"); |
| 218 | |
| 219 | first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ |
| 220 | if (first == hwnd) |
| 221 | return 0; /* Make sure it's not us! */ |
| 222 | winDebug(" WM_WM_REINIT: Replacing us(%x) with %x at head " |
| 223 | "of chain\n", hwnd, s_hwndNextViewer); |
| 224 | s_fCBCInitialized = FALSE; |
| 225 | ChangeClipboardChain(hwnd, s_hwndNextViewer); |
| 226 | s_hwndNextViewer = NULL; |
| 227 | s_fCBCInitialized = FALSE; |
| 228 | winDebug(" WM_WM_REINIT: Putting us back at head of chain.\n"); |
| 229 | first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ |
| 230 | if (first == hwnd) |
| 231 | return 0; /* Make sure it's not us! */ |
| 232 | next = SetClipboardViewer(hwnd); |
| 233 | error_code = GetLastError(); |
| 234 | if (SUCCEEDED(error_code) && (next == first)) /* SetClipboardViewer must have succeeded, and the handle */ |
| 235 | s_hwndNextViewer = next; /* it returned must have been the first window in the chain */ |
| 236 | else |
| 237 | s_fCBCInitialized = FALSE; |
| 238 | } |
| 239 | winDebug("winClipboardWindowProc - WM_WM_REINIT: Exit\n"); |
| 240 | return 0; |
| 241 | |
| 242 | case WM_DRAWCLIPBOARD: |
| 243 | { |
| 244 | static Atom atomClipboard; |
| 245 | static int generation; |
| 246 | static Bool s_fProcessingDrawClipboard = FALSE; |
| 247 | Display *pDisplay = g_pClipboardDisplay; |
| 248 | Window iWindow = g_iClipboardWindow; |
| 249 | int iReturn; |
| 250 | |
| 251 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Enter\n"); |
| 252 | |
| 253 | if (generation != serverGeneration) { |
| 254 | generation = serverGeneration; |
| 255 | atomClipboard = XInternAtom(pDisplay, "CLIPBOARD", False); |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * We've occasionally seen a loop in the clipboard chain. |
| 260 | * Try and fix it on the first hint of recursion. |
| 261 | */ |
| 262 | if (!s_fProcessingDrawClipboard) { |
| 263 | s_fProcessingDrawClipboard = TRUE; |
| 264 | } |
| 265 | else { |
| 266 | /* Attempt to break the nesting by getting out of the chain, twice?, and then fix and bail */ |
| 267 | s_fCBCInitialized = FALSE; |
| 268 | ChangeClipboardChain(hwnd, s_hwndNextViewer); |
| 269 | winFixClipboardChain(); |
| 270 | winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 271 | "Nested calls detected. Re-initing.\n"); |
| 272 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); |
| 273 | s_fProcessingDrawClipboard = FALSE; |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | /* Bail on first message */ |
| 278 | if (!s_fCBCInitialized) { |
| 279 | s_fCBCInitialized = TRUE; |
| 280 | s_fProcessingDrawClipboard = FALSE; |
| 281 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * NOTE: We cannot bail out when NULL == GetClipboardOwner () |
| 287 | * because some applications deal with the clipboard in a manner |
| 288 | * that causes the clipboard owner to be NULL when they are in |
| 289 | * fact taking ownership. One example of this is the Win32 |
| 290 | * native compile of emacs. |
| 291 | */ |
| 292 | |
| 293 | /* Bail when we still own the clipboard */ |
| 294 | if (hwnd == GetClipboardOwner()) { |
| 295 | |
| 296 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 297 | "We own the clipboard, returning.\n"); |
| 298 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); |
| 299 | s_fProcessingDrawClipboard = FALSE; |
| 300 | if (s_hwndNextViewer) |
| 301 | SendMessage(s_hwndNextViewer, message, wParam, lParam); |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | /* |
| 306 | * Do not take ownership of the X11 selections when something |
| 307 | * other than CF_TEXT or CF_UNICODETEXT has been copied |
| 308 | * into the Win32 clipboard. |
| 309 | */ |
| 310 | if (!IsClipboardFormatAvailable(CF_TEXT) |
| 311 | && !IsClipboardFormatAvailable(CF_UNICODETEXT)) { |
| 312 | |
| 313 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 314 | "Clipboard does not contain CF_TEXT nor " |
| 315 | "CF_UNICODETEXT.\n"); |
| 316 | |
| 317 | /* |
| 318 | * We need to make sure that the X Server has processed |
| 319 | * previous XSetSelectionOwner messages. |
| 320 | */ |
| 321 | XSync(pDisplay, FALSE); |
| 322 | |
| 323 | winDebug("winClipboardWindowProc - XSync done.\n"); |
| 324 | |
| 325 | /* Release PRIMARY selection if owned */ |
| 326 | iReturn = XGetSelectionOwner(pDisplay, XA_PRIMARY); |
| 327 | if (iReturn == g_iClipboardWindow) { |
| 328 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 329 | "PRIMARY selection is owned by us.\n"); |
| 330 | XSetSelectionOwner(pDisplay, XA_PRIMARY, None, CurrentTime); |
| 331 | } |
| 332 | else if (BadWindow == iReturn || BadAtom == iReturn) |
| 333 | winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 334 | "XGetSelection failed for PRIMARY: %d\n", |
| 335 | iReturn); |
| 336 | |
| 337 | /* Release CLIPBOARD selection if owned */ |
| 338 | iReturn = XGetSelectionOwner(pDisplay, atomClipboard); |
| 339 | if (iReturn == g_iClipboardWindow) { |
| 340 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 341 | "CLIPBOARD selection is owned by us.\n"); |
| 342 | XSetSelectionOwner(pDisplay, atomClipboard, None, CurrentTime); |
| 343 | } |
| 344 | else if (BadWindow == iReturn || BadAtom == iReturn) |
| 345 | winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 346 | "XGetSelection failed for CLIPBOARD: %d\n", |
| 347 | iReturn); |
| 348 | |
| 349 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); |
| 350 | s_fProcessingDrawClipboard = FALSE; |
| 351 | if (s_hwndNextViewer) |
| 352 | SendMessage(s_hwndNextViewer, message, wParam, lParam); |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | /* Reassert ownership of PRIMARY */ |
| 357 | iReturn = XSetSelectionOwner(pDisplay, |
| 358 | XA_PRIMARY, iWindow, CurrentTime); |
| 359 | if (iReturn == BadAtom || iReturn == BadWindow || |
| 360 | XGetSelectionOwner(pDisplay, XA_PRIMARY) != iWindow) { |
| 361 | winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 362 | "Could not reassert ownership of PRIMARY\n"); |
| 363 | } |
| 364 | else { |
| 365 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 366 | "Reasserted ownership of PRIMARY\n"); |
| 367 | } |
| 368 | |
| 369 | /* Reassert ownership of the CLIPBOARD */ |
| 370 | iReturn = XSetSelectionOwner(pDisplay, |
| 371 | atomClipboard, iWindow, CurrentTime); |
| 372 | |
| 373 | if (iReturn == BadAtom || iReturn == BadWindow || |
| 374 | XGetSelectionOwner(pDisplay, atomClipboard) != iWindow) { |
| 375 | winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 376 | "Could not reassert ownership of CLIPBOARD\n"); |
| 377 | } |
| 378 | else { |
| 379 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " |
| 380 | "Reasserted ownership of CLIPBOARD\n"); |
| 381 | } |
| 382 | |
| 383 | /* Flush the pending SetSelectionOwner event now */ |
| 384 | XFlush(pDisplay); |
| 385 | |
| 386 | s_fProcessingDrawClipboard = FALSE; |
| 387 | } |
| 388 | winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); |
| 389 | /* Pass the message on the next window in the clipboard viewer chain */ |
| 390 | if (s_hwndNextViewer) |
| 391 | SendMessage(s_hwndNextViewer, message, wParam, lParam); |
| 392 | return 0; |
| 393 | |
| 394 | case WM_DESTROYCLIPBOARD: |
| 395 | /* |
| 396 | * NOTE: Intentionally do nothing. |
| 397 | * Changes in the Win32 clipboard are handled by WM_DRAWCLIPBOARD |
| 398 | * above. We only process this message to conform to the specs |
| 399 | * for delayed clipboard rendering in Win32. You might think |
| 400 | * that we need to release ownership of the X11 selections, but |
| 401 | * we do not, because a WM_DRAWCLIPBOARD message will closely |
| 402 | * follow this message and reassert ownership of the X11 |
| 403 | * selections, handling the issue for us. |
| 404 | */ |
| 405 | winDebug("winClipboardWindowProc - WM_DESTROYCLIPBOARD - Ignored.\n"); |
| 406 | return 0; |
| 407 | |
| 408 | case WM_RENDERFORMAT: |
| 409 | case WM_RENDERALLFORMATS: |
| 410 | { |
| 411 | int iReturn; |
| 412 | Display *pDisplay = g_pClipboardDisplay; |
| 413 | Window iWindow = g_iClipboardWindow; |
| 414 | Bool fConvertToUnicode; |
| 415 | |
| 416 | winDebug("winClipboardWindowProc - WM_RENDER*FORMAT - Hello.\n"); |
| 417 | |
| 418 | /* Flag whether to convert to Unicode or not */ |
| 419 | if (message == WM_RENDERALLFORMATS) |
| 420 | fConvertToUnicode = FALSE; |
| 421 | else |
| 422 | fConvertToUnicode = (CF_UNICODETEXT == wParam); |
| 423 | |
| 424 | /* Request the selection contents */ |
| 425 | iReturn = XConvertSelection(pDisplay, |
| 426 | g_atomLastOwnedSelection, |
| 427 | XInternAtom(pDisplay, |
| 428 | "COMPOUND_TEXT", False), |
| 429 | XInternAtom(pDisplay, |
| 430 | "CYGX_CUT_BUFFER", False), |
| 431 | iWindow, CurrentTime); |
| 432 | if (iReturn == BadAtom || iReturn == BadWindow) { |
| 433 | winErrorFVerb(1, "winClipboardWindowProc - WM_RENDER*FORMAT - " |
| 434 | "XConvertSelection () failed\n"); |
| 435 | break; |
| 436 | } |
| 437 | |
| 438 | /* Special handling for WM_RENDERALLFORMATS */ |
| 439 | if (message == WM_RENDERALLFORMATS) { |
| 440 | /* We must open and empty the clipboard */ |
| 441 | |
| 442 | /* Close clipboard if we have it open already */ |
| 443 | if (GetOpenClipboardWindow() == hwnd) { |
| 444 | CloseClipboard(); |
| 445 | } |
| 446 | |
| 447 | if (!OpenClipboard(hwnd)) { |
| 448 | winErrorFVerb(1, "winClipboardWindowProc - WM_RENDER*FORMATS - " |
| 449 | "OpenClipboard () failed: %08x\n", |
| 450 | GetLastError()); |
| 451 | break; |
| 452 | } |
| 453 | |
| 454 | if (!EmptyClipboard()) { |
| 455 | winErrorFVerb(1, "winClipboardWindowProc - WM_RENDER*FORMATS - " |
| 456 | "EmptyClipboard () failed: %08x\n", |
| 457 | GetLastError()); |
| 458 | break; |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | /* Process the SelectionNotify event */ |
| 463 | iReturn = winProcessXEventsTimeout(hwnd, |
| 464 | iWindow, |
| 465 | pDisplay, |
| 466 | fConvertToUnicode, WIN_POLL_TIMEOUT); |
| 467 | |
| 468 | /* |
| 469 | * The last call to winProcessXEventsTimeout |
| 470 | * from above had better have seen a notify event, or else we |
| 471 | * are dealing with a buggy or old X11 app. In these cases we |
| 472 | * have to paste some fake data to the Win32 clipboard to |
| 473 | * satisfy the requirement that we write something to it. |
| 474 | */ |
| 475 | if (WIN_XEVENTS_NOTIFY != iReturn) { |
| 476 | /* Paste no data, to satisfy required call to SetClipboardData */ |
| 477 | SetClipboardData(CF_UNICODETEXT, NULL); |
| 478 | SetClipboardData(CF_TEXT, NULL); |
| 479 | |
| 480 | ErrorF |
| 481 | ("winClipboardWindowProc - timed out waiting for WIN_XEVENTS_NOTIFY\n"); |
| 482 | } |
| 483 | |
| 484 | /* Special handling for WM_RENDERALLFORMATS */ |
| 485 | if (message == WM_RENDERALLFORMATS) { |
| 486 | /* We must close the clipboard */ |
| 487 | |
| 488 | if (!CloseClipboard()) { |
| 489 | winErrorFVerb(1, |
| 490 | "winClipboardWindowProc - WM_RENDERALLFORMATS - " |
| 491 | "CloseClipboard () failed: %08x\n", |
| 492 | GetLastError()); |
| 493 | break; |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | winDebug("winClipboardWindowProc - WM_RENDER*FORMAT - Returning.\n"); |
| 498 | return 0; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | /* Let Windows perform default processing for unhandled messages */ |
| 503 | return DefWindowProc(hwnd, message, wParam, lParam); |
| 504 | } |
| 505 | |
| 506 | /* |
| 507 | * Process any pending Windows messages |
| 508 | */ |
| 509 | |
| 510 | BOOL |
| 511 | winClipboardFlushWindowsMessageQueue(HWND hwnd) |
| 512 | { |
| 513 | MSG msg; |
| 514 | |
| 515 | /* Flush the messaging window queue */ |
| 516 | /* NOTE: Do not pass the hwnd of our messaging window to PeekMessage, |
| 517 | * as this will filter out many non-window-specific messages that |
| 518 | * are sent to our thread, such as WM_QUIT. |
| 519 | */ |
| 520 | while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) { |
| 521 | /* Dispatch the message if not WM_QUIT */ |
| 522 | if (msg.message == WM_QUIT) |
| 523 | return FALSE; |
| 524 | else |
| 525 | DispatchMessage(&msg); |
| 526 | } |
| 527 | |
| 528 | return TRUE; |
| 529 | } |