diff options
Diffstat (limited to 'xorg-server/hw/xwin/winclipboardwndproc.c')
| -rw-r--r-- | xorg-server/hw/xwin/winclipboardwndproc.c | 1202 |
1 files changed, 573 insertions, 629 deletions
diff --git a/xorg-server/hw/xwin/winclipboardwndproc.c b/xorg-server/hw/xwin/winclipboardwndproc.c index 9394b04db..26a77ef74 100644 --- a/xorg-server/hw/xwin/winclipboardwndproc.c +++ b/xorg-server/hw/xwin/winclipboardwndproc.c @@ -1,629 +1,573 @@ -/* - *Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved. - *Copyright (C) Colin Harrison 2005-2008 - * - *Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the - *"Software"), to deal in the Software without restriction, including - *without limitation the rights to use, copy, modify, merge, publish, - *distribute, sublicense, and/or sell copies of the Software, and to - *permit persons to whom the Software is furnished to do so, subject to - *the following conditions: - * - *The above copyright notice and this permission notice shall be - *included in all copies or substantial portions of the Software. - * - *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR - *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF - *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION - *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - * - *Except as contained in this notice, the name of the copyright holder(s) - *and author(s) shall not be used in advertising or otherwise to promote - *the sale, use or other dealings in this Software without prior written - *authorization from the copyright holder(s) and author(s). - * - * Authors: Harold L Hunt II - * Colin Harrison - */ - -#ifdef HAVE_XWIN_CONFIG_H -#include <xwin-config.h> -#endif -#include <sys/types.h> -#include <sys/time.h> -#include "winclipboard.h" -#include "misc.h" - -/* - * Constants - */ - -#define WIN_CLIPBOARD_PROP "cyg_clipboard_prop" -#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; - -/* BPS - g_hwndClipboard needed for X app->Windows paste fix */ -extern HWND g_hwndClipboard; - -/* - * Local function prototypes - */ - -static int -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) -{ - 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 - || WIN_XEVENTS_CONVERT == iReturn) - { - /* Bail out if convert or notify processed */ - return iReturn; - } - } - } - - return WIN_XEVENTS_SUCCESS; -} - - -/* - * Process a given Windows message - */ - -/* BPS - Define our own message, which we'll post to ourselves to facilitate - * resetting the delayed rendering mechanism after each paste from X app to - * Windows app. TODO - Perhaps move to win.h with the other WM_USER messages. - */ -#define WM_USER_PASTE_COMPLETE (WM_USER + 1003) - -LRESULT CALLBACK -winClipboardWindowProc (HWND hwnd, UINT message, - WPARAM wParam, LPARAM lParam) -{ - static HWND s_hwndNextViewer; - static Bool s_fCBCInitialized; - - /* Branch on message type */ - switch (message) - { - case WM_DESTROY: - { - winDebug ("winClipboardWindowProc - WM_DESTROY\n"); - - /* Remove ourselves from the clipboard chain */ - ChangeClipboardChain (hwnd, s_hwndNextViewer); - - 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; - - - 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; - - 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; - - - 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) - { - 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); - - /* 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; - - 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); - if (WIN_XEVENTS_CONVERT == iReturn) - { - /* - * The selection was offered for conversion first, so we have - * to process a second SelectionNotify event to get the actual - * data in the selection. - */ - iReturn = winProcessXEventsTimeout (hwnd, - iWindow, - pDisplay, - fConvertToUnicode, - WIN_POLL_TIMEOUT); - } - - /* - * The last of the up-to two calls 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"); - } - - /* BPS - Post ourselves a user message whose handler will reset the - * delayed rendering mechanism after the paste is complete. This is - * necessary because calling SetClipboardData() with a NULL argument - * here will cause the data we just put on the clipboard to be lost! - */ - PostMessage(g_hwndClipboard, WM_USER_PASTE_COMPLETE, 0, 0); - - /* 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; - } - /* BPS - This WM_USER message is posted by us. It gives us the opportunity - * to reset the delayed rendering mechanism after each and every paste - * from an X app to a Windows app. Without such a mechanism, subsequent - * changes of selection in the X app owning the selection are not - * reflected in pastes into Windows apps, since Windows won't send us the - * WM_RENDERFORMAT message unless someone has set changed data (or NULL) - * on the clipboard. */ - case WM_USER_PASTE_COMPLETE: - { - if (hwnd != GetClipboardOwner ()) - /* In case we've lost the selection since posting the message */ - return 0; - winDebug ("winClipboardWindowProc - WM_USER_PASTE_COMPLETE\n"); - - /* Set up for another delayed rendering callback */ - OpenClipboard (g_hwndClipboard); - - /* Take ownership of the Windows clipboard */ - EmptyClipboard (); - - /* Advertise Unicode if we support it */ - if (g_fUnicodeSupport) - SetClipboardData (CF_UNICODETEXT, NULL); - - /* Always advertise regular text */ - SetClipboardData (CF_TEXT, NULL); - - /* Release the clipboard */ - CloseClipboard (); - } - return 0; - } - - /* Let Windows perform default processing for unhandled messages */ - return DefWindowProc (hwnd, message, wParam, lParam); -} - - -/* - * Process any pending Windows messages - */ - -BOOL -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); - } - - return TRUE; -} +/*
+ *Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
+ *Copyright (C) Colin Harrison 2005-2008
+ *
+ *Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ *"Software"), to deal in the Software without restriction, including
+ *without limitation the rights to use, copy, modify, merge, publish,
+ *distribute, sublicense, and/or sell copies of the Software, and to
+ *permit persons to whom the Software is furnished to do so, subject to
+ *the following conditions:
+ *
+ *The above copyright notice and this permission notice shall be
+ *included in all copies or substantial portions of the Software.
+ *
+ *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
+ *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *Except as contained in this notice, the name of the copyright holder(s)
+ *and author(s) shall not be used in advertising or otherwise to promote
+ *the sale, use or other dealings in this Software without prior written
+ *authorization from the copyright holder(s) and author(s).
+ *
+ * Authors: Harold L Hunt II
+ * Colin Harrison
+ */
+
+#ifdef HAVE_XWIN_CONFIG_H
+#include <xwin-config.h>
+#endif
+#include <sys/types.h>
+#include <sys/time.h>
+#include "winclipboard.h"
+#include "misc.h"
+#include "winmsg.h"
+#include "objbase.h"
+#include "ddraw.h"
+#include "winwindow.h"
+
+/*
+ * Constants
+ */
+
+#define WIN_CLIPBOARD_PROP "cyg_clipboard_prop"
+#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_fClipboardStarted;
+/* BPS - g_hwndClipboard needed for X app->Windows paste fix */
+extern HWND g_hwndClipboard;
+
+/*
+ * Local function prototypes
+ */
+
+static int
+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)
+{
+ int iConnNumber;
+ struct timeval tv;
+ int iReturn;
+ DWORD dwStopTime = (GetTickCount () / 1000) + iTimeoutSec;
+
+ /* Make sure the output messages are sent before waiting on a response. */
+ iReturn = winClipboardFlushXEvents (hwnd,
+ iWindow,
+ pDisplay,
+ fUseUnicode,
+ TRUE);
+ if (WIN_XEVENTS_NOTIFY == iReturn || WIN_XEVENTS_CONVERT == iReturn)
+ {
+ /* Bail out if convert or notify processed */
+ return iReturn;
+ }
+
+ /* 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 (%x). "
+ "Bailing.\n", iReturn, WSAGetLastError());
+ 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,
+ TRUE);
+ if (WIN_XEVENTS_NOTIFY == iReturn
+ || WIN_XEVENTS_CONVERT == iReturn)
+ {
+ /* Bail out if convert or notify processed */
+ return iReturn;
+ }
+ }
+ }
+
+ return WIN_XEVENTS_SUCCESS;
+}
+
+/*
+ * Process a given Windows message
+ */
+
+LRESULT CALLBACK
+winClipboardWindowProc (HWND hwnd, UINT message,
+ WPARAM wParam, LPARAM lParam)
+{
+ static HWND s_hwndNextViewer;
+
+ /* Branch on message type */
+ switch (message)
+ {
+ case WM_DESTROY:
+ {
+ winDebug ("winClipboardWindowProc - WM_DESTROY\n");
+
+ /* Remove ourselves from the clipboard chain */
+ ChangeClipboardChain (hwnd, s_hwndNextViewer);
+
+ s_hwndNextViewer = NULL;
+ g_hwndClipboard = NULL;
+ PostQuitMessage (0);
+ }
+ return 0;
+
+
+ case WM_CREATE:
+ {
+ HWND first, next;
+ DWORD error_code = 0;
+ winDebug ("winClipboardWindowProc - WM_CREATE\n");
+
+ /* Add ourselves to the clipboard viewer chain */
+ s_hwndNextViewer = SetClipboardViewer (hwnd);
+ #ifdef _DEBUG
+ if (s_hwndNextViewer== hwnd)
+ {
+ ErrorF("WM_CREATE: SetClipboardViewer returned own window. This causes an endless loop, so reset s_hwndNextViewer. ");
+ s_hwndNextViewer=NULL;
+ }
+ #endif
+
+ }
+ 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)
+ {
+ winDebug("WM_CHANGECBCHAIN: trying to set s_hwndNextViewer to own window. Resetting it back to NULL. ");
+ s_hwndNextViewer=NULL; /* This would cause an endless loop, so break it by ending the loop here. I have seen this happening, why??? */
+ }
+ }
+ 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;
+ if (!g_hwndClipboard)
+ return 0;
+ winDebug ("winClipboardWindowProc - WM_WM_REINIT: Enter\n");
+
+ first = GetClipboardViewer(); /* Get handle to first viewer in chain. */
+ if (first != hwnd)
+ {
+ winDebug (" WM_WM_REINIT: Replacing us(%x) with %x at head "
+ "of chain\n", hwnd, s_hwndNextViewer);
+ if (!wParam) ChangeClipboardChain (hwnd, s_hwndNextViewer); /* When wParam is set, the window was already removed from the chain */
+ winDebug (" WM_WM_REINIT: Putting us back at head of chain.\n");
+ s_hwndNextViewer = SetClipboardViewer (hwnd);
+ #ifdef _DEBUG
+ if (s_hwndNextViewer== hwnd)
+ {
+ ErrorF("WM_WM_REINIT: SetClipboardViewer returned own window. This causes an endless loop, so reset s_hwndNextViewer. ");
+ s_hwndNextViewer=NULL;
+ }
+ #endif
+ }
+ 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 0x%x 0x%x 0x%x: Enter\n",hwnd,wParam,lParam);
+
+ if (!g_fClipboardStarted)
+ {
+ winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit with no processing\n");
+ if (s_hwndNextViewer)
+ SendMessage (s_hwndNextViewer, message, wParam, lParam);
+ return 0;
+ }
+
+ 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 */
+ ChangeClipboardChain (hwnd, s_hwndNextViewer);
+ winFixClipboardChain(1);
+ ErrorF ("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
+ "Nested calls detected. Re-initing.\n");
+ winDebug ("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n");
+ s_fProcessingDrawClipboard = FALSE;
+ 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);
+
+ /* 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)
+ ErrorF ("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)
+ ErrorF ("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;
+ }
+ /* Only reassert ownership when we did not change the clipboard ourselves */
+ if (hwnd!=(HWND)wParam)
+ {
+ /* Reassert ownership of PRIMARY */
+ iReturn = XSetSelectionOwner (pDisplay,
+ XA_PRIMARY,
+ iWindow,
+ CurrentTime);
+ if (iReturn == BadAtom || iReturn == BadWindow ||
+ XGetSelectionOwner (pDisplay, XA_PRIMARY) != iWindow)
+ {
+ ErrorF ("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)
+ {
+ ErrorF ("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;
+
+ 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,
+ WIN_LOCAL_PROPERTY, False),
+ iWindow,
+ CurrentTime);
+ if (iReturn == BadAtom || iReturn == BadWindow)
+ {
+ ErrorF ("winClipboardWindowProc - WM_RENDER*FORMAT - "
+ "XConvertSelection () failed\n");
+ break;
+ }
+
+ /* Special handling for WM_RENDERALLFORMATS */
+ if (message == WM_RENDERALLFORMATS)
+ {
+ /* We must open and empty the clipboard */
+ if (!OpenClipboard (hwnd))
+ {
+ ErrorF ("winClipboardWindowProc - WM_RENDER*FORMATS - "
+ "OpenClipboard () failed: %08x\n",
+ GetLastError ());
+ break;
+ }
+
+ if (!EmptyClipboard ())
+ {
+ ErrorF ("winClipboardWindowProc - WM_RENDER*FORMATS - "
+ "EmptyClipboard () failed: %08x\n",
+ GetLastError ());
+ CloseClipboard ();
+ break;
+ }
+ }
+
+ /* Process the SelectionNotify event */
+ iReturn = winProcessXEventsTimeout (hwnd,
+ iWindow,
+ pDisplay,
+ fConvertToUnicode,
+ WIN_POLL_TIMEOUT);
+ if (WIN_XEVENTS_CONVERT == iReturn)
+ {
+ /*
+ * The selection was offered for conversion first, so we have
+ * to process a second SelectionNotify event to get the actual
+ * data in the selection.
+ */
+ winDebug("winClipboardWindowProc - Previous winProcessXEventsTimeout returned WIN_XEVENTS_CONVERT, calling it again\n");
+ iReturn = winProcessXEventsTimeout (hwnd,
+ iWindow,
+ pDisplay,
+ fConvertToUnicode,
+ WIN_POLL_TIMEOUT);
+ }
+
+ /*
+ * The last of the up-to two calls 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)
+ {
+ ErrorF("winClipboardWindowProc - winProcessXEventsTimeout should have returned WIN_XEVENTS_NOTIFY was %d\n",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 ())
+ {
+ ErrorF ("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);
+}
+
+
+/*
+ * Process any pending Windows messages
+ */
+
+BOOL
+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);
+ }
+
+ return TRUE;
+}
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