diff options
Diffstat (limited to 'xorg-server/hw/xwin/winclipboardwrappers.c')
| -rw-r--r-- | xorg-server/hw/xwin/winclipboardwrappers.c | 1021 |
1 files changed, 494 insertions, 527 deletions
diff --git a/xorg-server/hw/xwin/winclipboardwrappers.c b/xorg-server/hw/xwin/winclipboardwrappers.c index 658d050d2..172365d27 100644 --- a/xorg-server/hw/xwin/winclipboardwrappers.c +++ b/xorg-server/hw/xwin/winclipboardwrappers.c @@ -1,527 +1,494 @@ -/* - *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 "win.h" -#include "dixstruct.h" -#include <X11/Xatom.h> - - -/* - * Constants - */ - -#define CLIP_NUM_CALLS 4 -#define CLIP_NUM_SELECTIONS 2 -#define CLIP_OWN_PRIMARY 0 -#define CLIP_OWN_CLIPBOARD 1 - - -/* - * Local function prototypes - */ - -DISPATCH_PROC(winProcEstablishConnection); -DISPATCH_PROC(winProcQueryTree); -DISPATCH_PROC(winProcSetSelectionOwner); - - -/* - * References to external symbols - */ - -extern Bool g_fUnicodeSupport; -extern int g_iNumScreens; -extern unsigned int g_uiAuthDataLen; -extern char *g_pAuthData; -extern Bool g_fXdmcpEnabled; -extern Bool g_fClipboardLaunched; -extern Bool g_fClipboardStarted; -extern Bool g_fClipboard; -extern Window g_iClipboardWindow; -extern Atom g_atomLastOwnedSelection; -extern HWND g_hwndClipboard; - -extern winDispatchProcPtr winProcEstablishConnectionOrig; -extern winDispatchProcPtr winProcQueryTreeOrig; -extern winDispatchProcPtr winProcSetSelectionOwnerOrig; - - -/* - * Wrapper for internal QueryTree function. - * Hides the clipboard client when it is the only client remaining. - */ - -int -winProcQueryTree (ClientPtr client) -{ - int iReturn; - - ErrorF ("winProcQueryTree - Hello\n"); - - /* - * This procedure is only used for initialization. - * We can unwrap the original procedure at this point - * so that this function is no longer called until the - * server resets and the function is wrapped again. - */ - ProcVector[X_QueryTree] = winProcQueryTreeOrig; - - /* - * Call original function and bail if it fails. - * NOTE: We must do this first, since we need XdmcpOpenDisplay - * to be called before we initialize our clipboard client. - */ - iReturn = (*winProcQueryTreeOrig) (client); - if (iReturn != 0) - { - ErrorF ("winProcQueryTree - ProcQueryTree failed, bailing.\n"); - return iReturn; - } - - /* Make errors more obvious */ - winProcQueryTreeOrig = NULL; - - /* Do nothing if clipboard is not enabled */ - if (!g_fClipboard) - { - ErrorF ("winProcQueryTree - Clipboard is not enabled, " - "returning.\n"); - return iReturn; - } - - /* If the clipboard client has already been started, abort */ - if (g_fClipboardLaunched) - { - ErrorF ("winProcQueryTree - Clipboard client already " - "launched, returning.\n"); - return iReturn; - } - - /* Startup the clipboard client if clipboard mode is being used */ - if (g_fXdmcpEnabled && g_fClipboard) - { - /* - * NOTE: The clipboard client is started here for a reason: - * 1) Assume you are using XDMCP (e.g. XWin -query %hostname%) - * 2) If the clipboard client attaches during X Server startup, - * then it becomes the "magic client" that causes the X Server - * to reset if it exits. - * 3) XDMCP calls KillAllClients when it starts up. - * 4) The clipboard client is a client, so it is killed. - * 5) The clipboard client is the "magic client", so the X Server - * resets itself. - * 6) This repeats ad infinitum. - * 7) We avoid this by waiting until at least one client (could - * be XDM, could be another client) connects, which makes it - * almost certain that the clipboard client will not connect - * until after XDM when using XDMCP. - * 8) Unfortunately, there is another problem. - * 9) XDM walks the list of windows with XQueryTree, - * killing any client it finds with a window. - * 10)Thus, when using XDMCP we wait until the first call - * to ProcQueryTree before we startup the clipboard client. - * This should prevent XDM from finding the clipboard client, - * since it has not yet created a window. - * 11)Startup when not using XDMCP is handled in - * winProcEstablishConnection. - */ - - /* Create the clipboard client thread */ - if (!winInitClipboard ()) - { - ErrorF ("winProcQueryTree - winClipboardInit " - "failed.\n"); - return iReturn; - } - - ErrorF ("winProcQueryTree - winInitClipboard returned.\n"); - } - - /* Flag that clipboard client has been launched */ - g_fClipboardLaunched = TRUE; - - return iReturn; -} - - -/* - * Wrapper for internal EstablishConnection function. - * Initializes internal clients that must not be started until - * an external client has connected. - */ - -int -winProcEstablishConnection (ClientPtr client) -{ - int iReturn; - static int s_iCallCount = 0; - static unsigned long s_ulServerGeneration = 0; - - if (s_iCallCount == 0 || s_iCallCount == CLIP_NUM_CALLS) ErrorF ("winProcEstablishConnection - Hello\n"); - - /* Do nothing if clipboard is not enabled */ - if (!g_fClipboard) - { - ErrorF ("winProcEstablishConnection - Clipboard is not enabled, " - "returning.\n"); - - /* Unwrap the original function, call it, and return */ - InitialVector[2] = winProcEstablishConnectionOrig; - iReturn = (*winProcEstablishConnectionOrig) (client); - winProcEstablishConnectionOrig = NULL; - return iReturn; - } - - /* Watch for server reset */ - if (s_ulServerGeneration != serverGeneration) - { - /* Save new generation number */ - s_ulServerGeneration = serverGeneration; - - /* Reset call count */ - s_iCallCount = 0; - } - - /* Increment call count */ - ++s_iCallCount; - - /* Wait for CLIP_NUM_CALLS when Xdmcp is enabled */ - if (g_fXdmcpEnabled - && !g_fClipboardLaunched - && s_iCallCount < CLIP_NUM_CALLS) - { - if (s_iCallCount == 1) ErrorF ("winProcEstablishConnection - Xdmcp, waiting to " - "start clipboard client until %dth call", CLIP_NUM_CALLS); - if (s_iCallCount == CLIP_NUM_CALLS - 1) ErrorF (".\n"); - else ErrorF ("."); - return (*winProcEstablishConnectionOrig) (client); - } - - /* - * This procedure is only used for initialization. - * We can unwrap the original procedure at this point - * so that this function is no longer called until the - * server resets and the function is wrapped again. - */ - InitialVector[2] = winProcEstablishConnectionOrig; - - /* - * Call original function and bail if it fails. - * NOTE: We must do this first, since we need XdmcpOpenDisplay - * to be called before we initialize our clipboard client. - */ - iReturn = (*winProcEstablishConnectionOrig) (client); - if (iReturn != 0) - { - ErrorF ("winProcEstablishConnection - ProcEstablishConnection " - "failed, bailing.\n"); - return iReturn; - } - - /* Clear original function pointer */ - winProcEstablishConnectionOrig = NULL; - - /* If the clipboard client has already been started, abort */ - if (g_fClipboardLaunched) - { - ErrorF ("winProcEstablishConnection - Clipboard client already " - "launched, returning.\n"); - return iReturn; - } - - /* Startup the clipboard client if clipboard mode is being used */ - if (g_fClipboard) - { - /* - * NOTE: The clipboard client is started here for a reason: - * 1) Assume you are using XDMCP (e.g. XWin -query %hostname%) - * 2) If the clipboard client attaches during X Server startup, - * then it becomes the "magic client" that causes the X Server - * to reset if it exits. - * 3) XDMCP calls KillAllClients when it starts up. - * 4) The clipboard client is a client, so it is killed. - * 5) The clipboard client is the "magic client", so the X Server - * resets itself. - * 6) This repeats ad infinitum. - * 7) We avoid this by waiting until at least one client (could - * be XDM, could be another client) connects, which makes it - * almost certain that the clipboard client will not connect - * until after XDM when using XDMCP. - * 8) Unfortunately, there is another problem. - * 9) XDM walks the list of windows with XQueryTree, - * killing any client it finds with a window. - * 10)Thus, when using XDMCP we wait until CLIP_NUM_CALLS - * to ProcEstablishCeonnection before we startup the clipboard - * client. This should prevent XDM from finding the clipboard - * client, since it has not yet created a window. - */ - - /* Create the clipboard client thread */ - if (!winInitClipboard ()) - { - ErrorF ("winProcEstablishConnection - winClipboardInit " - "failed.\n"); - return iReturn; - } - - ErrorF ("winProcEstablishConnection - winInitClipboard returned.\n"); - } - - /* Flag that clipboard client has been launched */ - g_fClipboardLaunched = TRUE; - - return iReturn; -} - - -/* - * Wrapper for internal SetSelectionOwner function. - * Grabs ownership of Windows clipboard when X11 clipboard owner changes. - */ - -int -winProcSetSelectionOwner (ClientPtr client) -{ - int i; - DrawablePtr pDrawable; - WindowPtr pWindow = None; - Bool fOwnedToNotOwned = FALSE; - static Window s_iOwners[CLIP_NUM_SELECTIONS] = {None}; - static unsigned long s_ulServerGeneration = 0; - REQUEST(xSetSelectionOwnerReq); - - REQUEST_SIZE_MATCH(xSetSelectionOwnerReq); - - winDebug("winProcSetSelectionOwner - Hello.\n"); - - /* Watch for server reset */ - if (s_ulServerGeneration != serverGeneration) - { - /* Save new generation number */ - s_ulServerGeneration = serverGeneration; - - /* Initialize static variables */ - for (i = 0; i < CLIP_NUM_SELECTIONS; ++i) - s_iOwners[i] = None; - } - - /* Abort if clipboard not completely initialized yet */ - if (!g_fClipboardStarted) - { - /* ErrorF ("winProcSetSelectionOwner - Clipboard not yet started, " - "aborting.\n"); */ - goto winProcSetSelectionOwner_Done; - } - - /* Grab window if we have one */ - if (None != stuff->window) - { - /* Grab the Window from the request */ - int rc = dixLookupWindow(&pWindow, stuff->window, client, DixReadAccess); - if (rc != Success) { - ErrorF ("winProcSetSelectionOwner - Found BadWindow, aborting.\n"); - goto winProcSetSelectionOwner_Done; - } - } - - /* Now we either have a valid window or None */ - - /* Save selection owners for monitored selections, ignore other selections */ - if (XA_PRIMARY == stuff->selection) - { - /* Look for owned -> not owned transition */ - if (None == stuff->window - && None != s_iOwners[CLIP_OWN_PRIMARY]) - { - fOwnedToNotOwned = TRUE; - - winDebug("winProcSetSelectionOwner - PRIMARY - Going from " - "owned to not owned.\n"); - - /* Adjust last owned selection */ - if (None != s_iOwners[CLIP_OWN_CLIPBOARD]) - g_atomLastOwnedSelection = MakeAtom ("CLIPBOARD", 9, TRUE); - else - g_atomLastOwnedSelection = None; - } - - /* Save new selection owner or None */ - s_iOwners[CLIP_OWN_PRIMARY] = stuff->window; - - winDebug("winProcSetSelectionOwner - PRIMARY - Now owned by: %d\n", - stuff->window); - } - else if (MakeAtom ("CLIPBOARD", 9, TRUE) == stuff->selection) - { - /* Look for owned -> not owned transition */ - if (None == stuff->window - && None != s_iOwners[CLIP_OWN_CLIPBOARD]) - { - fOwnedToNotOwned = TRUE; - - winDebug("winProcSetSelectionOwner - CLIPBOARD - Going from " - "owned to not owned.\n"); - - /* Adjust last owned selection */ - if (None != s_iOwners[CLIP_OWN_PRIMARY]) - g_atomLastOwnedSelection = XA_PRIMARY; - else - g_atomLastOwnedSelection = None; - } - - /* Save new selection owner or None */ - s_iOwners[CLIP_OWN_CLIPBOARD] = stuff->window; - - winDebug("winProcSetSelectionOwner - CLIPBOARD - Now owned by: %d\n", - stuff->window); - - } - else - goto winProcSetSelectionOwner_Done; - - /* - * At this point, if one of the selections is still owned by the - * clipboard manager then it should be marked as unowned since - * we will be taking ownership of the Win32 clipboard. - */ - if (g_iClipboardWindow == s_iOwners[CLIP_OWN_PRIMARY]) - s_iOwners[CLIP_OWN_PRIMARY] = None; - if (g_iClipboardWindow == s_iOwners[CLIP_OWN_CLIPBOARD]) - s_iOwners[CLIP_OWN_CLIPBOARD] = None; - - /* - * Handle case when selection is being disowned, - * WM_DRAWCLIPBOARD did not do the disowning, - * both monitored selections are no longer owned, - * an owned to not owned transition was detected, - * and we currently own the Win32 clipboard. - */ - if (stuff->window == None - && s_iOwners[CLIP_OWN_PRIMARY] == None - && s_iOwners[CLIP_OWN_CLIPBOARD] == None - && fOwnedToNotOwned - && g_hwndClipboard != NULL - && g_hwndClipboard == GetClipboardOwner ()) - { - winDebug("winProcSetSelectionOwner - We currently own the " - "clipboard and neither the PRIMARY nor the CLIPBOARD " - "selections are owned, releasing ownership of Win32 " - "clipboard.\n"); - - /* Release ownership of the Windows clipboard */ - OpenClipboard (NULL); - EmptyClipboard (); - CloseClipboard (); - - goto winProcSetSelectionOwner_Done; - } - - /* Abort if no window at this point */ - if (None == stuff->window) - { - winDebug("winProcSetSelectionOwner - No window, returning.\n"); - goto winProcSetSelectionOwner_Done; - } - - /* Abort if invalid selection */ - if (!ValidAtom (stuff->selection)) - { - ErrorF ("winProcSetSelectionOwner - Found BadAtom, aborting.\n"); - goto winProcSetSelectionOwner_Done; - } - - /* Cast Window to Drawable */ - pDrawable = (DrawablePtr) pWindow; - - /* Abort if clipboard manager is owning the selection */ - if (pDrawable->id == g_iClipboardWindow) - { - winDebug("winProcSetSelectionOwner - We changed ownership, " - "aborting.\n"); - goto winProcSetSelectionOwner_Done; - } - - /* Abort if root window is taking ownership */ - if (pDrawable->id == 0) - { - ErrorF ("winProcSetSelectionOwner - Root window taking ownership, " - "aborting\n"); - goto winProcSetSelectionOwner_Done; - } - - /* Close clipboard if we have it open already */ - if (GetOpenClipboardWindow () == g_hwndClipboard) - { - CloseClipboard (); - } - - /* Access the Windows clipboard */ - if (!OpenClipboard (g_hwndClipboard)) - { - ErrorF ("winProcSetSelectionOwner - OpenClipboard () failed: %08x\n", - (int) GetLastError ()); - goto winProcSetSelectionOwner_Done; - } - - /* Take ownership of the Windows clipboard */ - if (!EmptyClipboard ()) - { - ErrorF ("winProcSetSelectionOwner - EmptyClipboard () failed: %08x\n", - (int) GetLastError ()); - goto winProcSetSelectionOwner_Done; - } - - /* Advertise Unicode if we support it */ - if (g_fUnicodeSupport) - SetClipboardData (CF_UNICODETEXT, NULL); - - /* Always advertise regular text */ - SetClipboardData (CF_TEXT, NULL); - - /* Save handle to last owned selection */ - g_atomLastOwnedSelection = stuff->selection; - - /* Release the clipboard */ - if (!CloseClipboard ()) - { - ErrorF ("winProcSetSelectionOwner - CloseClipboard () failed: " - "%08x\n", - (int) GetLastError ()); - goto winProcSetSelectionOwner_Done; - } - - winProcSetSelectionOwner_Done: - return (*winProcSetSelectionOwnerOrig) (client); -} +/*
+ *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 "win.h"
+#include "dixstruct.h"
+#include <X11/Xatom.h>
+
+
+/*
+ * Constants
+ */
+
+#define CLIP_NUM_CALLS 4
+#define CLIP_NUM_SELECTIONS 2
+#define CLIP_OWN_PRIMARY 0
+#define CLIP_OWN_CLIPBOARD 1
+
+
+/*
+ * Local function prototypes
+ */
+
+DISPATCH_PROC(winProcEstablishConnection);
+DISPATCH_PROC(winProcQueryTree);
+DISPATCH_PROC(winProcSetSelectionOwner);
+
+
+/*
+ * References to external symbols
+ */
+
+extern Bool g_fUnicodeSupport;
+extern int g_iNumScreens;
+extern unsigned int g_uiAuthDataLen;
+extern char *g_pAuthData;
+extern Bool g_fXdmcpEnabled;
+extern Bool g_fClipboardLaunched;
+extern Bool g_fClipboardStarted;
+extern Bool g_fClipboard;
+extern Window g_iClipboardWindow;
+extern Atom g_atomLastOwnedSelection;
+extern HWND g_hwndClipboard;
+
+extern winDispatchProcPtr winProcEstablishConnectionOrig;
+extern winDispatchProcPtr winProcQueryTreeOrig;
+extern winDispatchProcPtr winProcSetSelectionOwnerOrig;
+
+
+/*
+ * Wrapper for internal QueryTree function.
+ * Hides the clipboard client when it is the only client remaining.
+ */
+
+int
+winProcQueryTree (ClientPtr client)
+{
+ int iReturn;
+
+ winDebug ("winProcQueryTree - Hello\n");
+
+ /*
+ * This procedure is only used for initialization.
+ * We can unwrap the original procedure at this point
+ * so that this function is no longer called until the
+ * server resets and the function is wrapped again.
+ */
+ ProcVector[X_QueryTree] = winProcQueryTreeOrig;
+
+ /*
+ * Call original function and bail if it fails.
+ * NOTE: We must do this first, since we need XdmcpOpenDisplay
+ * to be called before we initialize our clipboard client.
+ */
+ iReturn = (*winProcQueryTreeOrig) (client);
+ if (iReturn != 0)
+ {
+ ErrorF ("winProcQueryTree - ProcQueryTree failed, bailing.\n");
+ return iReturn;
+ }
+
+ /* Make errors more obvious */
+ winProcQueryTreeOrig = NULL;
+
+ /* Do nothing if clipboard is not enabled */
+ if (!g_fClipboard)
+ {
+ winDebug ("winProcQueryTree - Clipboard is not enabled, "
+ "returning.\n");
+ return iReturn;
+ }
+
+ /* If the clipboard client has already been started, abort */
+ if (g_fClipboardLaunched)
+ {
+ winDebug ("winProcQueryTree - Clipboard client already "
+ "launched, returning.\n");
+ return iReturn;
+ }
+
+ /* Startup the clipboard client if clipboard mode is being used */
+ if (g_fXdmcpEnabled && g_fClipboard)
+ {
+ /*
+ * NOTE: The clipboard client is started here for a reason:
+ * 1) Assume you are using XDMCP (e.g. XWin -query %hostname%)
+ * 2) If the clipboard client attaches during X Server startup,
+ * then it becomes the "magic client" that causes the X Server
+ * to reset if it exits.
+ * 3) XDMCP calls KillAllClients when it starts up.
+ * 4) The clipboard client is a client, so it is killed.
+ * 5) The clipboard client is the "magic client", so the X Server
+ * resets itself.
+ * 6) This repeats ad infinitum.
+ * 7) We avoid this by waiting until at least one client (could
+ * be XDM, could be another client) connects, which makes it
+ * almost certain that the clipboard client will not connect
+ * until after XDM when using XDMCP.
+ * 8) Unfortunately, there is another problem.
+ * 9) XDM walks the list of windows with XQueryTree,
+ * killing any client it finds with a window.
+ * 10)Thus, when using XDMCP we wait until the first call
+ * to ProcQueryTree before we startup the clipboard client.
+ * This should prevent XDM from finding the clipboard client,
+ * since it has not yet created a window.
+ * 11)Startup when not using XDMCP is handled in
+ * winProcEstablishConnection.
+ */
+
+ /* Create the clipboard client thread */
+ if (!winInitClipboard ())
+ {
+ ErrorF ("winProcQueryTree - winClipboardInit "
+ "failed.\n");
+ return iReturn;
+ }
+
+ winDebug ("winProcQueryTree - winInitClipboard returned.\n");
+ }
+
+ /* Flag that clipboard client has been launched */
+ g_fClipboardLaunched = TRUE;
+
+ return iReturn;
+}
+
+
+/*
+ * Wrapper for internal EstablishConnection function.
+ * Initializes internal clients that must not be started until
+ * an external client has connected.
+ */
+
+int
+winProcEstablishConnection (ClientPtr client)
+{
+ int iReturn;
+ static int s_iCallCount = 0;
+ static unsigned long s_ulServerGeneration = 0;
+
+ #ifdef WINDBG
+ if (s_iCallCount == 0 || s_iCallCount == CLIP_NUM_CALLS) winDebug ("winProcEstablishConnection - Hello\n");
+ #endif
+
+ /* Do nothing if clipboard is not enabled */
+ if (!g_fClipboard)
+ {
+ winDebug ("winProcEstablishConnection - Clipboard is not enabled, "
+ "returning.\n");
+
+ /* Unwrap the original function, call it, and return */
+ InitialVector[2] = winProcEstablishConnectionOrig;
+ iReturn = (*winProcEstablishConnectionOrig) (client);
+ winProcEstablishConnectionOrig = NULL;
+ return iReturn;
+ }
+
+ /* Watch for server reset */
+ if (s_ulServerGeneration != serverGeneration)
+ {
+ /* Save new generation number */
+ s_ulServerGeneration = serverGeneration;
+
+ /* Reset call count */
+ s_iCallCount = 0;
+ }
+
+ /* Increment call count */
+ ++s_iCallCount;
+
+ /* Wait for CLIP_NUM_CALLS when Xdmcp is enabled */
+ if (g_fXdmcpEnabled
+ && !g_fClipboardLaunched
+ && s_iCallCount < CLIP_NUM_CALLS)
+ {
+ #ifdef WINDBG
+ if (s_iCallCount == 1) winDebug ("winProcEstablishConnection - Xdmcp, waiting to "
+ "start clipboard client until %dth call", CLIP_NUM_CALLS);
+ if (s_iCallCount == CLIP_NUM_CALLS - 1) winDebug (".\n");
+ else winDebug (".");
+ #endif
+ return (*winProcEstablishConnectionOrig) (client);
+ }
+
+ /*
+ * This procedure is only used for initialization.
+ * We can unwrap the original procedure at this point
+ * so that this function is no longer called until the
+ * server resets and the function is wrapped again.
+ */
+ InitialVector[2] = winProcEstablishConnectionOrig;
+
+ /*
+ * Call original function and bail if it fails.
+ * NOTE: We must do this first, since we need XdmcpOpenDisplay
+ * to be called before we initialize our clipboard client.
+ */
+ iReturn = (*winProcEstablishConnectionOrig) (client);
+ if (iReturn != 0)
+ {
+ ErrorF ("winProcEstablishConnection - ProcEstablishConnection "
+ "failed, bailing.\n");
+ return iReturn;
+ }
+
+ /* Clear original function pointer */
+ winProcEstablishConnectionOrig = NULL;
+
+ /* If the clipboard client has already been started, abort */
+ if (g_fClipboardLaunched)
+ {
+ winDebug ("winProcEstablishConnection - Clipboard client already "
+ "launched, returning.\n");
+ return iReturn;
+ }
+
+ /* Startup the clipboard client if clipboard mode is being used */
+ if (g_fClipboard)
+ {
+ /*
+ * NOTE: The clipboard client is started here for a reason:
+ * 1) Assume you are using XDMCP (e.g. XWin -query %hostname%)
+ * 2) If the clipboard client attaches during X Server startup,
+ * then it becomes the "magic client" that causes the X Server
+ * to reset if it exits.
+ * 3) XDMCP calls KillAllClients when it starts up.
+ * 4) The clipboard client is a client, so it is killed.
+ * 5) The clipboard client is the "magic client", so the X Server
+ * resets itself.
+ * 6) This repeats ad infinitum.
+ * 7) We avoid this by waiting until at least one client (could
+ * be XDM, could be another client) connects, which makes it
+ * almost certain that the clipboard client will not connect
+ * until after XDM when using XDMCP.
+ * 8) Unfortunately, there is another problem.
+ * 9) XDM walks the list of windows with XQueryTree,
+ * killing any client it finds with a window.
+ * 10)Thus, when using XDMCP we wait until CLIP_NUM_CALLS
+ * to ProcEstablishCeonnection before we startup the clipboard
+ * client. This should prevent XDM from finding the clipboard
+ * client, since it has not yet created a window.
+ */
+
+ /* Create the clipboard client thread */
+ if (!winInitClipboard ())
+ {
+ ErrorF ("winProcEstablishConnection - winClipboardInit "
+ "failed.\n");
+ return iReturn;
+ }
+
+ winDebug ("winProcEstablishConnection - winInitClipboard returned.\n");
+ }
+
+ /* Flag that clipboard client has been launched */
+ g_fClipboardLaunched = TRUE;
+
+ return iReturn;
+}
+
+
+/*
+ * Wrapper for internal SetSelectionOwner function.
+ * Grabs ownership of Windows clipboard when X11 clipboard owner changes.
+ */
+int
+winProcSetSelectionOwner (ClientPtr client)
+{
+ int i;
+ DrawablePtr pDrawable;
+ WindowPtr pWindow = None;
+ static Window s_iOwners[CLIP_NUM_SELECTIONS] = {None};
+ static unsigned long s_ulServerGeneration = 0;
+ REQUEST(xSetSelectionOwnerReq);
+
+ REQUEST_SIZE_MATCH(xSetSelectionOwnerReq);
+
+ winDebug ("winProcSetSelectionOwner - Hello.\n");
+
+ /* Watch for server reset */
+ if (s_ulServerGeneration != serverGeneration)
+ {
+ /* Save new generation number */
+ s_ulServerGeneration = serverGeneration;
+
+ /* Initialize static variables */
+ for (i = 0; i < CLIP_NUM_SELECTIONS; ++i)
+ s_iOwners[i] = None;
+ }
+
+ /* Abort if clipboard not completely initialized yet */
+ if (!g_fClipboardStarted)
+ {
+ winDebug ("winProcSetSelectionOwner - Clipboard not yet started, "
+ "aborting.\n");
+ goto winProcSetSelectionOwner_Done;
+ }
+
+ /* Grab window if we have one */
+ if (None != stuff->window)
+ {
+ /* Grab the Window from the request */
+ int rc = dixLookupWindow(&pWindow, stuff->window, client, DixReadAccess);
+ if (rc != Success) {
+ ErrorF ("winProcSetSelectionOwner - Found BadWindow, aborting.\n");
+ goto winProcSetSelectionOwner_Done;
+ }
+ }
+
+ /* Now we either have a valid window or None */
+
+ /* Save selection owners for monitored selections, ignore other selections */
+ if (XA_PRIMARY == stuff->selection)
+ {
+ /* Look for owned -> not owned transition */
+ if (None == stuff->window
+ && None != s_iOwners[CLIP_OWN_PRIMARY])
+ {
+ winDebug ("winProcSetSelectionOwner - PRIMARY - Going from "
+ "owned to not owned.\n");
+
+ /* Adjust last owned selection */
+ if (None != s_iOwners[CLIP_OWN_CLIPBOARD])
+ g_atomLastOwnedSelection = MakeAtom ("CLIPBOARD", 9, TRUE);
+ else
+ g_atomLastOwnedSelection = None;
+ }
+
+ /* Save new selection owner or None */
+ s_iOwners[CLIP_OWN_PRIMARY] = stuff->window;
+
+ winDebug ("winProcSetSelectionOwner - PRIMARY - Now owned by: 0x%x (clipboard is 0x%x)\n",
+ stuff->window,g_iClipboardWindow);
+ }
+ else if (MakeAtom ("CLIPBOARD", 9, TRUE) == stuff->selection)
+ {
+ /* Look for owned -> not owned transition */
+ if (None == stuff->window
+ && None != s_iOwners[CLIP_OWN_CLIPBOARD])
+ {
+ winDebug ("winProcSetSelectionOwner - CLIPBOARD - Going from "
+ "owned to not owned.\n");
+
+ /* Adjust last owned selection */
+ if (None != s_iOwners[CLIP_OWN_PRIMARY])
+ g_atomLastOwnedSelection = XA_PRIMARY;
+ else
+ g_atomLastOwnedSelection = None;
+ }
+
+ /* Save new selection owner or None */
+ s_iOwners[CLIP_OWN_CLIPBOARD] = stuff->window;
+
+ winDebug ("winProcSetSelectionOwner - CLIPBOARD - Now owned by: 0x%x, clipboard is 0x%x\n",
+ stuff->window,g_iClipboardWindow);
+ }
+ else
+ goto winProcSetSelectionOwner_Done;
+
+ /*
+ * At this point, if one of the selections is still owned by the
+ * clipboard manager then it should be marked as unowned since
+ * we will be taking ownership of the Win32 clipboard.
+ */
+ if (g_iClipboardWindow == s_iOwners[CLIP_OWN_PRIMARY])
+ s_iOwners[CLIP_OWN_PRIMARY] = None;
+ if (g_iClipboardWindow == s_iOwners[CLIP_OWN_CLIPBOARD])
+ s_iOwners[CLIP_OWN_CLIPBOARD] = None;
+
+ /* Abort if no window at this point */
+ if (None == stuff->window)
+ {
+ winDebug ("winProcSetSelectionOwner - No window, returning.\n");
+ goto winProcSetSelectionOwner_Done;
+ }
+
+ /* Abort if invalid selection */
+ if (!ValidAtom (stuff->selection))
+ {
+ winDebug ("winProcSetSelectionOwner - Found BadAtom, aborting.\n");
+ goto winProcSetSelectionOwner_Done;
+ }
+
+ /* Cast Window to Drawable */
+ pDrawable = (DrawablePtr) pWindow;
+
+ /* Abort if clipboard manager is owning the selection */
+ if (pDrawable->id == g_iClipboardWindow)
+ {
+ winDebug ("winProcSetSelectionOwner - We changed ownership, "
+ "aborting.\n");
+ goto winProcSetSelectionOwner_Done;
+ }
+
+ /* Abort if root window is taking ownership */
+ if (pDrawable->id == 0)
+ {
+ winDebug ("winProcSetSelectionOwner - Root window taking ownership, "
+ "aborting\n");
+ goto winProcSetSelectionOwner_Done;
+ }
+
+ /* Access the Windows clipboard */
+ if (!OpenClipboard (g_hwndClipboard))
+ {
+ ErrorF ("winProcSetSelectionOwner - OpenClipboard () failed: %08x, hwnd: %08x\n",
+ (int) GetLastError (),g_hwndClipboard);
+ goto winProcSetSelectionOwner_Done;
+ }
+
+ /* Take ownership of the Windows clipboard */
+ if (!EmptyClipboard ())
+ {
+ ErrorF ("winProcSetSelectionOwner - EmptyClipboard () failed: %08x\n",
+ (int) GetLastError ());
+ CloseClipboard ();
+ goto winProcSetSelectionOwner_Done;
+ }
+
+ winDebug("winProcSetSelectionOwner - SetClipboardData NULL\n");
+
+ /* Advertise Unicode if we support it */
+ if (g_fUnicodeSupport)
+ SetClipboardData (CF_UNICODETEXT, NULL);
+
+ /* Always advertise regular text */
+ SetClipboardData (CF_TEXT, NULL);
+
+ /* Save handle to last owned selection */
+ g_atomLastOwnedSelection = stuff->selection;
+
+ /* Release the clipboard */
+ if (!CloseClipboard ())
+ {
+ ErrorF ("winProcSetSelectionOwner - CloseClipboard () failed: "
+ "%08x\n",
+ (int) GetLastError ());
+ goto winProcSetSelectionOwner_Done;
+ }
+
+winProcSetSelectionOwner_Done:
+ return (*winProcSetSelectionOwnerOrig) (client);
+}
|