diff options
Diffstat (limited to 'xorg-server/hw/xwin/winclipboardwndproc.c')
| -rw-r--r-- | xorg-server/hw/xwin/winclipboardwndproc.c | 870 |
1 files changed, 413 insertions, 457 deletions
diff --git a/xorg-server/hw/xwin/winclipboardwndproc.c b/xorg-server/hw/xwin/winclipboardwndproc.c index 02347ff43..78b061517 100644 --- a/xorg-server/hw/xwin/winclipboardwndproc.c +++ b/xorg-server/hw/xwin/winclipboardwndproc.c @@ -44,527 +44,483 @@ #define WIN_POLL_TIMEOUT 1 - /* * References to external symbols */ -extern Bool g_fUseUnicode; -extern Bool g_fUnicodeSupport; -extern void *g_pClipboardDisplay; -extern Window g_iClipboardWindow; -extern Atom g_atomLastOwnedSelection; - +extern Bool g_fUseUnicode; +extern Bool g_fUnicodeSupport; +extern void *g_pClipboardDisplay; +extern Window g_iClipboardWindow; +extern Atom g_atomLastOwnedSelection; /* * Local function prototypes */ static int -winProcessXEventsTimeout (HWND hwnd, int iWindow, Display *pDisplay, - Bool fUseUnicode, int iTimeoutSec); +winProcessXEventsTimeout(HWND hwnd, int iWindow, Display * pDisplay, + Bool fUseUnicode, int iTimeoutSec); /* * Process X events up to specified timeout */ static int -winProcessXEventsTimeout (HWND hwnd, int iWindow, Display *pDisplay, - Bool fUseUnicode, int iTimeoutSec) +winProcessXEventsTimeout(HWND hwnd, int iWindow, Display * pDisplay, + Bool fUseUnicode, int iTimeoutSec) { - int iConnNumber; - struct timeval tv; - int iReturn; - DWORD dwStopTime = (GetTickCount () / 1000) + iTimeoutSec; - - /* We need to ensure that all pending events are processed */ - XSync (pDisplay, FALSE); - - /* Get our connection number */ - iConnNumber = ConnectionNumber (pDisplay); - - /* Loop for X events */ - while (1) - { - fd_set fdsRead; - - /* Setup the file descriptor set */ - FD_ZERO (&fdsRead); - FD_SET (iConnNumber, &fdsRead); - - /* Adjust timeout */ - tv.tv_sec = dwStopTime - (GetTickCount () / 1000); - tv.tv_usec = 0; - - /* Break out if no time left */ - if (tv.tv_sec < 0) - return WIN_XEVENTS_SUCCESS; - - /* Wait for an X event */ - iReturn = select (iConnNumber + 1,/* Highest fds number */ - &fdsRead, /* Read mask */ - NULL, /* No write mask */ - NULL, /* No exception mask */ - &tv); /* No timeout */ - if (iReturn < 0) - { - ErrorF ("winProcessXEventsTimeout - Call to select () failed: %d. " - "Bailing.\n", iReturn); - break; - } - - /* Branch on which descriptor became active */ - if (FD_ISSET (iConnNumber, &fdsRead)) - { - /* Process X events */ - /* Exit when we see that server is shutting down */ - iReturn = winClipboardFlushXEvents (hwnd, - iWindow, - pDisplay, - fUseUnicode); - if (WIN_XEVENTS_NOTIFY == iReturn) - { - /* Bail out if notify processed */ - return iReturn; - } - } + int iConnNumber; + struct timeval tv; + int iReturn; + DWORD dwStopTime = (GetTickCount() / 1000) + iTimeoutSec; + + /* We need to ensure that all pending events are processed */ + XSync(pDisplay, FALSE); + + /* Get our connection number */ + iConnNumber = ConnectionNumber(pDisplay); + + /* Loop for X events */ + while (1) { + fd_set fdsRead; + + /* Setup the file descriptor set */ + FD_ZERO(&fdsRead); + FD_SET(iConnNumber, &fdsRead); + + /* Adjust timeout */ + tv.tv_sec = dwStopTime - (GetTickCount() / 1000); + tv.tv_usec = 0; + + /* Break out if no time left */ + if (tv.tv_sec < 0) + return WIN_XEVENTS_SUCCESS; + + /* Wait for an X event */ + iReturn = select(iConnNumber + 1, /* Highest fds number */ + &fdsRead, /* Read mask */ + NULL, /* No write mask */ + NULL, /* No exception mask */ + &tv); /* No timeout */ + if (iReturn < 0) { + ErrorF("winProcessXEventsTimeout - Call to select () failed: %d. " + "Bailing.\n", iReturn); + break; + } + + /* Branch on which descriptor became active */ + if (FD_ISSET(iConnNumber, &fdsRead)) { + /* Process X events */ + /* Exit when we see that server is shutting down */ + iReturn = winClipboardFlushXEvents(hwnd, + iWindow, pDisplay, fUseUnicode); + if (WIN_XEVENTS_NOTIFY == iReturn) { + /* Bail out if notify processed */ + return iReturn; + } + } } - return WIN_XEVENTS_SUCCESS; + return WIN_XEVENTS_SUCCESS; } - /* * Process a given Windows message */ LRESULT CALLBACK -winClipboardWindowProc (HWND hwnd, UINT message, - WPARAM wParam, LPARAM lParam) +winClipboardWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { - static HWND s_hwndNextViewer; - static Bool s_fCBCInitialized; + static HWND s_hwndNextViewer; + static Bool s_fCBCInitialized; - /* Branch on message type */ - switch (message) - { + /* Branch on message type */ + switch (message) { case WM_DESTROY: - { - winDebug ("winClipboardWindowProc - WM_DESTROY\n"); + { + winDebug("winClipboardWindowProc - WM_DESTROY\n"); - /* Remove ourselves from the clipboard chain */ - ChangeClipboardChain (hwnd, s_hwndNextViewer); - - s_hwndNextViewer = NULL; + /* Remove ourselves from the clipboard chain */ + ChangeClipboardChain(hwnd, s_hwndNextViewer); - PostQuitMessage (0); - } - return 0; + s_hwndNextViewer = NULL; + PostQuitMessage(0); + } + return 0; case WM_CREATE: - { - HWND first, next; - DWORD error_code = 0; - winDebug ("winClipboardWindowProc - WM_CREATE\n"); - - first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ - if (first == hwnd) return 0; /* Make sure it's not us! */ - /* Add ourselves to the clipboard viewer chain */ - next = SetClipboardViewer (hwnd); - error_code = GetLastError(); - if (SUCCEEDED(error_code) && (next == first)) /* SetClipboardViewer must have succeeded, and the handle */ - s_hwndNextViewer = next; /* it returned must have been the first window in the chain */ - else - s_fCBCInitialized = FALSE; - } - return 0; - + { + HWND first, next; + DWORD error_code = 0; + + winDebug("winClipboardWindowProc - WM_CREATE\n"); + + first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ + if (first == hwnd) + return 0; /* Make sure it's not us! */ + /* Add ourselves to the clipboard viewer chain */ + next = SetClipboardViewer(hwnd); + error_code = GetLastError(); + if (SUCCEEDED(error_code) && (next == first)) /* SetClipboardViewer must have succeeded, and the handle */ + s_hwndNextViewer = next; /* it returned must have been the first window in the chain */ + else + s_fCBCInitialized = FALSE; + } + return 0; case WM_CHANGECBCHAIN: - { - winDebug ("winClipboardWindowProc - WM_CHANGECBCHAIN: wParam(%x) " - "lParam(%x) s_hwndNextViewer(%x)\n", - wParam, lParam, s_hwndNextViewer); - - if ((HWND) wParam == s_hwndNextViewer) - { - s_hwndNextViewer = (HWND) lParam; - if (s_hwndNextViewer == hwnd) - { - s_hwndNextViewer = NULL; - winErrorFVerb (1, "winClipboardWindowProc - WM_CHANGECBCHAIN: " - "attempted to set next window to ourselves."); - } - } - else if (s_hwndNextViewer) - SendMessage (s_hwndNextViewer, message, - wParam, lParam); - - } - winDebug ("winClipboardWindowProc - WM_CHANGECBCHAIN: Exit\n"); - return 0; + { + winDebug("winClipboardWindowProc - WM_CHANGECBCHAIN: wParam(%x) " + "lParam(%x) s_hwndNextViewer(%x)\n", + wParam, lParam, s_hwndNextViewer); + + if ((HWND) wParam == s_hwndNextViewer) { + s_hwndNextViewer = (HWND) lParam; + if (s_hwndNextViewer == hwnd) { + s_hwndNextViewer = NULL; + winErrorFVerb(1, "winClipboardWindowProc - WM_CHANGECBCHAIN: " + "attempted to set next window to ourselves."); + } + } + else if (s_hwndNextViewer) + SendMessage(s_hwndNextViewer, message, wParam, lParam); + + } + winDebug("winClipboardWindowProc - WM_CHANGECBCHAIN: Exit\n"); + return 0; case WM_WM_REINIT: - { + { /* Ensure that we're in the clipboard chain. Some apps, * WinXP's remote desktop for one, don't play nice with the * chain. This message is called whenever we receive a * WM_ACTIVATEAPP message to ensure that we continue to * receive clipboard messages. - * - * It might be possible to detect if we're still in the chain - * by calling SendMessage (GetClipboardViewer(), - * WM_DRAWCLIPBOARD, 0, 0); and then seeing if we get the - * WM_DRAWCLIPBOARD message. That, however, might be more - * expensive than just putting ourselves back into the chain. - */ - - HWND first, next; - DWORD error_code = 0; - winDebug ("winClipboardWindowProc - WM_WM_REINIT: Enter\n"); - - first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ - if (first == hwnd) return 0; /* Make sure it's not us! */ - winDebug (" WM_WM_REINIT: Replacing us(%x) with %x at head " - "of chain\n", hwnd, s_hwndNextViewer); - s_fCBCInitialized = FALSE; - ChangeClipboardChain (hwnd, s_hwndNextViewer); - s_hwndNextViewer = NULL; - s_fCBCInitialized = FALSE; - winDebug (" WM_WM_REINIT: Putting us back at head of chain.\n"); - first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ - if (first == hwnd) return 0; /* Make sure it's not us! */ - next = SetClipboardViewer (hwnd); - error_code = GetLastError(); - if (SUCCEEDED(error_code) && (next == first)) /* SetClipboardViewer must have succeeded, and the handle */ - s_hwndNextViewer = next; /* it returned must have been the first window in the chain */ - else - s_fCBCInitialized = FALSE; - } - winDebug ("winClipboardWindowProc - WM_WM_REINIT: Exit\n"); - return 0; - + * + * It might be possible to detect if we're still in the chain + * by calling SendMessage (GetClipboardViewer(), + * WM_DRAWCLIPBOARD, 0, 0); and then seeing if we get the + * WM_DRAWCLIPBOARD message. That, however, might be more + * expensive than just putting ourselves back into the chain. + */ + + HWND first, next; + DWORD error_code = 0; + + winDebug("winClipboardWindowProc - WM_WM_REINIT: Enter\n"); + + first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ + if (first == hwnd) + return 0; /* Make sure it's not us! */ + winDebug(" WM_WM_REINIT: Replacing us(%x) with %x at head " + "of chain\n", hwnd, s_hwndNextViewer); + s_fCBCInitialized = FALSE; + ChangeClipboardChain(hwnd, s_hwndNextViewer); + s_hwndNextViewer = NULL; + s_fCBCInitialized = FALSE; + winDebug(" WM_WM_REINIT: Putting us back at head of chain.\n"); + first = GetClipboardViewer(); /* Get handle to first viewer in chain. */ + if (first == hwnd) + return 0; /* Make sure it's not us! */ + next = SetClipboardViewer(hwnd); + error_code = GetLastError(); + if (SUCCEEDED(error_code) && (next == first)) /* SetClipboardViewer must have succeeded, and the handle */ + s_hwndNextViewer = next; /* it returned must have been the first window in the chain */ + else + s_fCBCInitialized = FALSE; + } + winDebug("winClipboardWindowProc - WM_WM_REINIT: Exit\n"); + return 0; case WM_DRAWCLIPBOARD: - { - static Atom atomClipboard; - static int generation; - static Bool s_fProcessingDrawClipboard = FALSE; - Display *pDisplay = g_pClipboardDisplay; - Window iWindow = g_iClipboardWindow; - int iReturn; - - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD: Enter\n"); - - if (generation != serverGeneration) - { + { + static Atom atomClipboard; + static int generation; + static Bool s_fProcessingDrawClipboard = FALSE; + Display *pDisplay = g_pClipboardDisplay; + Window iWindow = g_iClipboardWindow; + int iReturn; + + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Enter\n"); + + if (generation != serverGeneration) { generation = serverGeneration; - atomClipboard = XInternAtom (pDisplay, "CLIPBOARD", False); - } - - /* - * We've occasionally seen a loop in the clipboard chain. - * Try and fix it on the first hint of recursion. - */ - if (! s_fProcessingDrawClipboard) - { - s_fProcessingDrawClipboard = TRUE; - } - else - { - /* Attempt to break the nesting by getting out of the chain, twice?, and then fix and bail */ - s_fCBCInitialized = FALSE; - ChangeClipboardChain (hwnd, s_hwndNextViewer); - winFixClipboardChain(); - winErrorFVerb (1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "Nested calls detected. Re-initing.\n"); - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); - s_fProcessingDrawClipboard = FALSE; - return 0; - } - - /* Bail on first message */ - if (!s_fCBCInitialized) - { - s_fCBCInitialized = TRUE; - s_fProcessingDrawClipboard = FALSE; - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); - return 0; - } - - /* - * NOTE: We cannot bail out when NULL == GetClipboardOwner () - * because some applications deal with the clipboard in a manner - * that causes the clipboard owner to be NULL when they are in - * fact taking ownership. One example of this is the Win32 - * native compile of emacs. - */ - - /* Bail when we still own the clipboard */ - if (hwnd == GetClipboardOwner ()) - { - - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "We own the clipboard, returning.\n"); - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); - s_fProcessingDrawClipboard = FALSE; - if (s_hwndNextViewer) - SendMessage (s_hwndNextViewer, message, wParam, lParam); - return 0; - } - - /* - * Do not take ownership of the X11 selections when something - * other than CF_TEXT or CF_UNICODETEXT has been copied - * into the Win32 clipboard. - */ - if (!IsClipboardFormatAvailable (CF_TEXT) - && !IsClipboardFormatAvailable (CF_UNICODETEXT)) - { - - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "Clipboard does not contain CF_TEXT nor " - "CF_UNICODETEXT.\n"); - - /* - * We need to make sure that the X Server has processed - * previous XSetSelectionOwner messages. - */ - XSync (pDisplay, FALSE); + atomClipboard = XInternAtom(pDisplay, "CLIPBOARD", False); + } + + /* + * We've occasionally seen a loop in the clipboard chain. + * Try and fix it on the first hint of recursion. + */ + if (!s_fProcessingDrawClipboard) { + s_fProcessingDrawClipboard = TRUE; + } + else { + /* Attempt to break the nesting by getting out of the chain, twice?, and then fix and bail */ + s_fCBCInitialized = FALSE; + ChangeClipboardChain(hwnd, s_hwndNextViewer); + winFixClipboardChain(); + winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "Nested calls detected. Re-initing.\n"); + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); + s_fProcessingDrawClipboard = FALSE; + return 0; + } + + /* Bail on first message */ + if (!s_fCBCInitialized) { + s_fCBCInitialized = TRUE; + s_fProcessingDrawClipboard = FALSE; + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); + return 0; + } + + /* + * NOTE: We cannot bail out when NULL == GetClipboardOwner () + * because some applications deal with the clipboard in a manner + * that causes the clipboard owner to be NULL when they are in + * fact taking ownership. One example of this is the Win32 + * native compile of emacs. + */ + + /* Bail when we still own the clipboard */ + if (hwnd == GetClipboardOwner()) { + + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "We own the clipboard, returning.\n"); + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); + s_fProcessingDrawClipboard = FALSE; + if (s_hwndNextViewer) + SendMessage(s_hwndNextViewer, message, wParam, lParam); + return 0; + } + + /* + * Do not take ownership of the X11 selections when something + * other than CF_TEXT or CF_UNICODETEXT has been copied + * into the Win32 clipboard. + */ + if (!IsClipboardFormatAvailable(CF_TEXT) + && !IsClipboardFormatAvailable(CF_UNICODETEXT)) { + + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "Clipboard does not contain CF_TEXT nor " + "CF_UNICODETEXT.\n"); + + /* + * We need to make sure that the X Server has processed + * previous XSetSelectionOwner messages. + */ + XSync(pDisplay, FALSE); winDebug("winClipboardWindowProc - XSync done.\n"); - - /* Release PRIMARY selection if owned */ - iReturn = XGetSelectionOwner (pDisplay, XA_PRIMARY); - if (iReturn == g_iClipboardWindow) - { - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "PRIMARY selection is owned by us.\n"); - XSetSelectionOwner (pDisplay, - XA_PRIMARY, - None, - CurrentTime); - } - else if (BadWindow == iReturn || BadAtom == iReturn) - winErrorFVerb (1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "XGetSelection failed for PRIMARY: %d\n", iReturn); - - /* Release CLIPBOARD selection if owned */ - iReturn = XGetSelectionOwner (pDisplay, - atomClipboard); - if (iReturn == g_iClipboardWindow) - { - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "CLIPBOARD selection is owned by us.\n"); - XSetSelectionOwner (pDisplay, - atomClipboard, - None, - CurrentTime); - } - else if (BadWindow == iReturn || BadAtom == iReturn) - winErrorFVerb (1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "XGetSelection failed for CLIPBOARD: %d\n", iReturn); - - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); - s_fProcessingDrawClipboard = FALSE; - if (s_hwndNextViewer) - SendMessage (s_hwndNextViewer, message, wParam, lParam); - return 0; - } - - /* Reassert ownership of PRIMARY */ - iReturn = XSetSelectionOwner (pDisplay, - XA_PRIMARY, - iWindow, - CurrentTime); - if (iReturn == BadAtom || iReturn == BadWindow || - XGetSelectionOwner (pDisplay, XA_PRIMARY) != iWindow) - { - winErrorFVerb (1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "Could not reassert ownership of PRIMARY\n"); - } - else - { - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "Reasserted ownership of PRIMARY\n"); - } - - /* Reassert ownership of the CLIPBOARD */ - iReturn = XSetSelectionOwner (pDisplay, - atomClipboard, - iWindow, - CurrentTime); - - if (iReturn == BadAtom || iReturn == BadWindow || - XGetSelectionOwner (pDisplay, atomClipboard) != iWindow) - { - winErrorFVerb (1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "Could not reassert ownership of CLIPBOARD\n"); - } - else - { - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD - " - "Reasserted ownership of CLIPBOARD\n"); - } - - /* Flush the pending SetSelectionOwner event now */ - XFlush (pDisplay); - - s_fProcessingDrawClipboard = FALSE; - } - winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); - /* Pass the message on the next window in the clipboard viewer chain */ - if (s_hwndNextViewer) - SendMessage (s_hwndNextViewer, message, wParam, lParam); - return 0; + /* Release PRIMARY selection if owned */ + iReturn = XGetSelectionOwner(pDisplay, XA_PRIMARY); + if (iReturn == g_iClipboardWindow) { + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "PRIMARY selection is owned by us.\n"); + XSetSelectionOwner(pDisplay, XA_PRIMARY, None, CurrentTime); + } + else if (BadWindow == iReturn || BadAtom == iReturn) + winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "XGetSelection failed for PRIMARY: %d\n", + iReturn); + + /* Release CLIPBOARD selection if owned */ + iReturn = XGetSelectionOwner(pDisplay, atomClipboard); + if (iReturn == g_iClipboardWindow) { + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "CLIPBOARD selection is owned by us.\n"); + XSetSelectionOwner(pDisplay, atomClipboard, None, CurrentTime); + } + else if (BadWindow == iReturn || BadAtom == iReturn) + winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "XGetSelection failed for CLIPBOARD: %d\n", + iReturn); + + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); + s_fProcessingDrawClipboard = FALSE; + if (s_hwndNextViewer) + SendMessage(s_hwndNextViewer, message, wParam, lParam); + return 0; + } + + /* Reassert ownership of PRIMARY */ + iReturn = XSetSelectionOwner(pDisplay, + XA_PRIMARY, iWindow, CurrentTime); + if (iReturn == BadAtom || iReturn == BadWindow || + XGetSelectionOwner(pDisplay, XA_PRIMARY) != iWindow) { + winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "Could not reassert ownership of PRIMARY\n"); + } + else { + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "Reasserted ownership of PRIMARY\n"); + } + + /* Reassert ownership of the CLIPBOARD */ + iReturn = XSetSelectionOwner(pDisplay, + atomClipboard, iWindow, CurrentTime); + + if (iReturn == BadAtom || iReturn == BadWindow || + XGetSelectionOwner(pDisplay, atomClipboard) != iWindow) { + winErrorFVerb(1, "winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "Could not reassert ownership of CLIPBOARD\n"); + } + else { + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - " + "Reasserted ownership of CLIPBOARD\n"); + } + + /* Flush the pending SetSelectionOwner event now */ + XFlush(pDisplay); + + s_fProcessingDrawClipboard = FALSE; + } + winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n"); + /* Pass the message on the next window in the clipboard viewer chain */ + if (s_hwndNextViewer) + SendMessage(s_hwndNextViewer, message, wParam, lParam); + return 0; case WM_DESTROYCLIPBOARD: - /* - * NOTE: Intentionally do nothing. - * Changes in the Win32 clipboard are handled by WM_DRAWCLIPBOARD - * above. We only process this message to conform to the specs - * for delayed clipboard rendering in Win32. You might think - * that we need to release ownership of the X11 selections, but - * we do not, because a WM_DRAWCLIPBOARD message will closely - * follow this message and reassert ownership of the X11 - * selections, handling the issue for us. - */ - winDebug ("winClipboardWindowProc - WM_DESTROYCLIPBOARD - Ignored.\n"); - return 0; + /* + * NOTE: Intentionally do nothing. + * Changes in the Win32 clipboard are handled by WM_DRAWCLIPBOARD + * above. We only process this message to conform to the specs + * for delayed clipboard rendering in Win32. You might think + * that we need to release ownership of the X11 selections, but + * we do not, because a WM_DRAWCLIPBOARD message will closely + * follow this message and reassert ownership of the X11 + * selections, handling the issue for us. + */ + winDebug("winClipboardWindowProc - WM_DESTROYCLIPBOARD - Ignored.\n"); + return 0; case WM_RENDERFORMAT: case WM_RENDERALLFORMATS: - { - int iReturn; - Display *pDisplay = g_pClipboardDisplay; - Window iWindow = g_iClipboardWindow; - Bool fConvertToUnicode; - - winDebug ("winClipboardWindowProc - WM_RENDER*FORMAT - Hello.\n"); - - /* Flag whether to convert to Unicode or not */ - if (message == WM_RENDERALLFORMATS) - fConvertToUnicode = FALSE; - else - fConvertToUnicode = g_fUnicodeSupport && (CF_UNICODETEXT == wParam); - - /* Request the selection contents */ - iReturn = XConvertSelection (pDisplay, - g_atomLastOwnedSelection, - XInternAtom (pDisplay, - "COMPOUND_TEXT", False), - XInternAtom (pDisplay, - "CYGX_CUT_BUFFER", False), - iWindow, - CurrentTime); - if (iReturn == BadAtom || iReturn == BadWindow) - { - winErrorFVerb (1, "winClipboardWindowProc - WM_RENDER*FORMAT - " - "XConvertSelection () failed\n"); - break; - } - - /* Special handling for WM_RENDERALLFORMATS */ - if (message == WM_RENDERALLFORMATS) - { - /* We must open and empty the clipboard */ - - /* Close clipboard if we have it open already */ - if (GetOpenClipboardWindow () == hwnd) - { - CloseClipboard (); - } - - if (!OpenClipboard (hwnd)) - { - winErrorFVerb (1, "winClipboardWindowProc - WM_RENDER*FORMATS - " - "OpenClipboard () failed: %08x\n", - GetLastError ()); - break; - } - - if (!EmptyClipboard ()) - { - winErrorFVerb (1, "winClipboardWindowProc - WM_RENDER*FORMATS - " - "EmptyClipboard () failed: %08x\n", - GetLastError ()); - break; - } - } - - /* Process the SelectionNotify event */ - iReturn = winProcessXEventsTimeout (hwnd, - iWindow, - pDisplay, - fConvertToUnicode, - WIN_POLL_TIMEOUT); - - /* - * The last call to winProcessXEventsTimeout - * from above had better have seen a notify event, or else we - * are dealing with a buggy or old X11 app. In these cases we - * have to paste some fake data to the Win32 clipboard to - * satisfy the requirement that we write something to it. - */ - if (WIN_XEVENTS_NOTIFY != iReturn) - { - /* Paste no data, to satisfy required call to SetClipboardData */ - if (g_fUnicodeSupport) - SetClipboardData (CF_UNICODETEXT, NULL); - SetClipboardData (CF_TEXT, NULL); - - ErrorF("winClipboardWindowProc - timed out waiting for WIN_XEVENTS_NOTIFY\n"); - } - - /* Special handling for WM_RENDERALLFORMATS */ - if (message == WM_RENDERALLFORMATS) - { - /* We must close the clipboard */ - - if (!CloseClipboard ()) - { - winErrorFVerb (1, "winClipboardWindowProc - WM_RENDERALLFORMATS - " - "CloseClipboard () failed: %08x\n", - GetLastError ()); - break; - } - } - - winDebug ("winClipboardWindowProc - WM_RENDER*FORMAT - Returning.\n"); - return 0; - } + { + int iReturn; + Display *pDisplay = g_pClipboardDisplay; + Window iWindow = g_iClipboardWindow; + Bool fConvertToUnicode; + + winDebug("winClipboardWindowProc - WM_RENDER*FORMAT - Hello.\n"); + + /* Flag whether to convert to Unicode or not */ + if (message == WM_RENDERALLFORMATS) + fConvertToUnicode = FALSE; + else + fConvertToUnicode = g_fUnicodeSupport && (CF_UNICODETEXT == wParam); + + /* Request the selection contents */ + iReturn = XConvertSelection(pDisplay, + g_atomLastOwnedSelection, + XInternAtom(pDisplay, + "COMPOUND_TEXT", False), + XInternAtom(pDisplay, + "CYGX_CUT_BUFFER", False), + iWindow, CurrentTime); + if (iReturn == BadAtom || iReturn == BadWindow) { + winErrorFVerb(1, "winClipboardWindowProc - WM_RENDER*FORMAT - " + "XConvertSelection () failed\n"); + break; + } + + /* Special handling for WM_RENDERALLFORMATS */ + if (message == WM_RENDERALLFORMATS) { + /* We must open and empty the clipboard */ + + /* Close clipboard if we have it open already */ + if (GetOpenClipboardWindow() == hwnd) { + CloseClipboard(); + } + + if (!OpenClipboard(hwnd)) { + winErrorFVerb(1, "winClipboardWindowProc - WM_RENDER*FORMATS - " + "OpenClipboard () failed: %08x\n", + GetLastError()); + break; + } + + if (!EmptyClipboard()) { + winErrorFVerb(1, "winClipboardWindowProc - WM_RENDER*FORMATS - " + "EmptyClipboard () failed: %08x\n", + GetLastError()); + break; + } + } + + /* Process the SelectionNotify event */ + iReturn = winProcessXEventsTimeout(hwnd, + iWindow, + pDisplay, + fConvertToUnicode, WIN_POLL_TIMEOUT); + + /* + * The last call to winProcessXEventsTimeout + * from above had better have seen a notify event, or else we + * are dealing with a buggy or old X11 app. In these cases we + * have to paste some fake data to the Win32 clipboard to + * satisfy the requirement that we write something to it. + */ + if (WIN_XEVENTS_NOTIFY != iReturn) { + /* Paste no data, to satisfy required call to SetClipboardData */ + if (g_fUnicodeSupport) + SetClipboardData(CF_UNICODETEXT, NULL); + SetClipboardData(CF_TEXT, NULL); + + ErrorF + ("winClipboardWindowProc - timed out waiting for WIN_XEVENTS_NOTIFY\n"); + } + + /* Special handling for WM_RENDERALLFORMATS */ + if (message == WM_RENDERALLFORMATS) { + /* We must close the clipboard */ + + if (!CloseClipboard()) { + winErrorFVerb(1, + "winClipboardWindowProc - WM_RENDERALLFORMATS - " + "CloseClipboard () failed: %08x\n", + GetLastError()); + break; + } + } + + winDebug("winClipboardWindowProc - WM_RENDER*FORMAT - Returning.\n"); + return 0; + } } - /* Let Windows perform default processing for unhandled messages */ - return DefWindowProc (hwnd, message, wParam, lParam); + /* Let Windows perform default processing for unhandled messages */ + return DefWindowProc(hwnd, message, wParam, lParam); } - /* * Process any pending Windows messages */ BOOL -winClipboardFlushWindowsMessageQueue (HWND hwnd) +winClipboardFlushWindowsMessageQueue(HWND hwnd) { - MSG msg; - - /* Flush the messaging window queue */ - /* NOTE: Do not pass the hwnd of our messaging window to PeekMessage, - * as this will filter out many non-window-specific messages that - * are sent to our thread, such as WM_QUIT. - */ - while (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) - { - /* Dispatch the message if not WM_QUIT */ - if (msg.message == WM_QUIT) - return FALSE; - else - DispatchMessage (&msg); + MSG msg; + + /* Flush the messaging window queue */ + /* NOTE: Do not pass the hwnd of our messaging window to PeekMessage, + * as this will filter out many non-window-specific messages that + * are sent to our thread, such as WM_QUIT. + */ + while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) { + /* Dispatch the message if not WM_QUIT */ + if (msg.message == WM_QUIT) + return FALSE; + else + DispatchMessage(&msg); } - - return TRUE; + + return TRUE; } |