diff options
Diffstat (limited to 'xorg-server/hw/xwin/winclipboardwrappers.c')
| -rw-r--r-- | xorg-server/hw/xwin/winclipboardwrappers.c | 938 |
1 files changed, 411 insertions, 527 deletions
diff --git a/xorg-server/hw/xwin/winclipboardwrappers.c b/xorg-server/hw/xwin/winclipboardwrappers.c index ddc7814d7..ec6e95a8a 100644 --- a/xorg-server/hw/xwin/winclipboardwrappers.c +++ b/xorg-server/hw/xwin/winclipboardwrappers.c @@ -1,527 +1,411 @@ -/*
- *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
- */
-
-int winProcEstablishConnection(ClientPtr /* client */);
-int winProcQueryTree(ClientPtr /* client */);
-int winProcSetSelectionOwner(ClientPtr /* client */);
-
-
-/*
- * 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_SELECTIONS 2 +#define CLIP_OWN_PRIMARY 0 +#define CLIP_OWN_CLIPBOARD 1 + + +/* + * Local function prototypes + */ + +int winProcEstablishConnection(ClientPtr /* client */); +int winProcQueryTree(ClientPtr /* client */); +int winProcSetSelectionOwner(ClientPtr /* client */); +DISPATCH_PROC(winProcEstablishConnection); +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 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) 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; + + /* + * 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. + */ + + /* 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); +} |