[hbelusca] 70355: [WIN32K:CLIPBOARD] - When cleaning the clipboard, cancel any pending delayed rendering and increment all the sequence&serial numbers. - Fix the clipboard access check when perform...

Author: hbelusca
Date: Wed Dec 16 00:26:27 2015
New Revision: 70355

URL: http://svn.reactos.org/svn/reactos?rev=70355&view=rev
Log:
[WIN32K:CLIPBOARD]
- When cleaning the clipboard, cancel any pending delayed rendering and increment all the
sequence&serial numbers.
- Fix the clipboard access check when performing a delay rendering. This fixes VBox host
<-> guest copy/paste amongst others...
CORE-5512 CORE-9620
CORE-8367 CORE-8627 #comment Please retest with revision >= 70355.

Modified:
    trunk/reactos/win32ss/user/ntuser/clipboard.c

Modified: trunk/reactos/win32ss/user/ntuser/clipboard.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/clipbo…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/clipboard.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/clipboard.c	[iso-8859-1] Wed Dec 16 00:26:27 2015
@@ -628,10 +628,12 @@
         co_IntSendMessageNoWait(pWinStaObj->spwndClipOwner->head.h,
WM_DESTROYCLIPBOARD, 0, 0);
     }
 
-        pWinStaObj->spwndClipOwner = pWinStaObj->spwndClipOpen;
-
-        pWinStaObj->iClipSequenceNumber++;
-        pWinStaObj->fClipboardChanged = TRUE;
+    pWinStaObj->spwndClipOwner = pWinStaObj->spwndClipOpen;
+
+    pWinStaObj->iClipSerialNumber++;
+    pWinStaObj->iClipSequenceNumber++;
+    pWinStaObj->fClipboardChanged = TRUE;
+    pWinStaObj->fInDelayedRendering = FALSE;
 
     bRet = TRUE;
 
@@ -930,10 +932,15 @@
     if (!pWinStaObj)
         goto cleanup;
 
-    /* If it's delayed rendering we don't have to open clipboard */
-    if ((pWinStaObj->fInDelayedRendering &&
-        pWinStaObj->spwndClipOwner->head.pti != PsGetCurrentThreadWin32Thread())
||
-        !IntIsClipboardOpenByMe(pWinStaObj))
+    /*
+     * Check if the clipboard is correctly opened:
+     * - in case of normal rendering, we must have opened the clipboard;
+     * - in case of delayed rendering, the clipboard must be already opened
+     *   by another application, but we need to be the clipboard owner.
+     */
+    if ((!pWinStaObj->fInDelayedRendering &&
!IntIsClipboardOpenByMe(pWinStaObj)) ||
+        (pWinStaObj->fInDelayedRendering && !(pWinStaObj->ptiClipLock
&&
+         pWinStaObj->spwndClipOwner->head.pti ==
PsGetCurrentThreadWin32Thread())))
     {
         ERR("Access denied!\n");
         EngSetLastError(ERROR_CLIPBOARD_NOT_OPEN);
@@ -957,7 +964,10 @@
         IntAddFormatedData(pWinStaObj, fmt, hData, scd->fGlobalHandle, FALSE);
         TRACE("hData stored\n");
 
-        pWinStaObj->iClipSequenceNumber++;
+        /* If the serial number was increased, increase also the sequence number */
+        if (scd->fIncSerialNumber)
+            pWinStaObj->iClipSequenceNumber++;
+
         pWinStaObj->fClipboardChanged = TRUE;
 
         /* Note: Synthesized formats are added in NtUserCloseClipboard */