Synchronised with released branch.

1 files changed, 583 insertions, 583 deletions

diff --git a/xorg-server/hw/xwin/winclipboardwndproc.c b/xorg-server/hw/xwin/winclipboardwndproc.c
index ad8e7d0a4..40c1e9a5c 100644
--- a/xorg-server/hw/xwin/winclipboardwndproc.c
+++ b/xorg-server/hw/xwin/winclipboardwndproc.c
@@ -1,583 +1,583 @@
-/*
- *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 a Windows event or 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
- */
-
-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.
-       */
-      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);
-	  }
-
-	/* Special handling for WM_RENDERALLFORMATS */
-	if (message == WM_RENDERALLFORMATS)
-	  {
-	    /* We must close the clipboard */
-	    
-	    if (!CloseClipboard ())
-	      {
-	      winErrorFVerb (1, "winClipboardWindowProc - WM_RENDERALLFORMATS - "
-		      "CloseClipboard () failed: %08x\n",
-		      GetLastError ());
-	      break;
-	      }
-	  }
-
-	winDebug ("winClipboardWindowProc - WM_RENDER*FORMAT - Returning.\n");
-	return 0;
-      }
-    }
-
-  /* Let Windows perform default processing for unhandled messages */
-  return DefWindowProc (hwnd, message, wParam, lParam);
-}
-
-
-/*
- * 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"

+

+/*

+ * 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 a Windows event or 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);

+	  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;

+  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.

+       */

+      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);

+	  }

+

+	/* Special handling for WM_RENDERALLFORMATS */

+	if (message == WM_RENDERALLFORMATS)

+	  {

+	    /* We must close the clipboard */

+	    

+	    if (!CloseClipboard ())

+	      {

+	      winErrorFVerb (1, "winClipboardWindowProc - WM_RENDERALLFORMATS - "

+		      "CloseClipboard () failed: %08x\n",

+		      GetLastError ());

+	      break;

+	      }

+	  }

+

+	winDebug ("winClipboardWindowProc - WM_RENDER*FORMAT - Returning.\n");

+	return 0;

+      }

+    }

+

+  /* Let Windows perform default processing for unhandled messages */

+  return DefWindowProc (hwnd, message, wParam, lParam);

+}

+

+

+/*

+ * 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;

+}