diff options
Diffstat (limited to 'xorg-server/hw/xwin/winclipboardwndproc.c')
| -rw-r--r-- | xorg-server/hw/xwin/winclipboardwndproc.c | 1132 |
1 files changed, 566 insertions, 566 deletions
diff --git a/xorg-server/hw/xwin/winclipboardwndproc.c b/xorg-server/hw/xwin/winclipboardwndproc.c index 57413b1c3..1dbee9b6f 100644 --- a/xorg-server/hw/xwin/winclipboardwndproc.c +++ b/xorg-server/hw/xwin/winclipboardwndproc.c @@ -1,566 +1,566 @@ -/*
- *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_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;
-extern Bool g_fClipboardPrimary;
-
-/*
- * 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)
- {
- /* Bail out if 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);
-
- if (g_fClipboardPrimary)
- {
- /* 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)
- {
- if (g_fClipboardPrimary)
- {
- /* 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 */
- do {
- iReturn = winProcessXEventsTimeout (hwnd,
- iWindow,
- pDisplay,
- fConvertToUnicode,
- WIN_POLL_TIMEOUT);
- } while (WIN_XEVENTS_CONVERT == iReturn);
-
-
- /*
- * 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)
- {
- 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;
-}
+/* + *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_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; +extern Bool g_fClipboardPrimary; + +/* + * 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) + { + /* Bail out if 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); + + if (g_fClipboardPrimary) + { + /* 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) + { + if (g_fClipboardPrimary) + { + /* 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 */ + do { + iReturn = winProcessXEventsTimeout (hwnd, + iWindow, + pDisplay, + fConvertToUnicode, + WIN_POLL_TIMEOUT); + } while (WIN_XEVENTS_CONVERT == iReturn); + + + /* + * 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) + { + 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; +} |