server: Cleanup clipboard information upon window destruction.

dlls/user32/tests/clipboard.c

@@ -266,13 +266,13 @@ static void test_ClipboardOwner(void)
     ok( ret, "DestroyWindow error %d\n", GetLastError());
     SetLastError(0xdeadbeef);
     ok(!GetClipboardOwner() && GetLastError() == 0xdeadbeef, "clipboard should not be owned\n");
-    todo_wine ok(!GetClipboardViewer() && GetLastError() == 0xdeadbeef, "viewer still exists\n");
-    todo_wine ok(!GetOpenClipboardWindow() && GetLastError() == 0xdeadbeef, "clipboard should not be open\n");
+    ok(!GetClipboardViewer() && GetLastError() == 0xdeadbeef, "viewer still exists\n");
+    ok(!GetOpenClipboardWindow() && GetLastError() == 0xdeadbeef, "clipboard should not be open\n");
 
     SetLastError( 0xdeadbeef );
     ret = CloseClipboard();
-    todo_wine ok( !ret, "CloseClipboard succeeded\n" );
-    todo_wine ok( GetLastError() == ERROR_CLIPBOARD_NOT_OPEN, "wrong error %u\n", GetLastError() );
+    ok( !ret, "CloseClipboard succeeded\n" );
+    ok( GetLastError() == ERROR_CLIPBOARD_NOT_OPEN, "wrong error %u\n", GetLastError() );
 
     ret = OpenClipboard( 0 );
     ok( ret, "OpenClipboard error %d\n", GetLastError());

server/clipboard.c

@@ -111,6 +111,25 @@ static struct clipboard *get_process_clipboard(void)
     return clipboard;
 }
 
+/* cleanup clipboard information upon window destruction */
+void cleanup_clipboard_window( struct desktop *desktop, user_handle_t window )
+{
+    struct clipboard *clipboard = desktop->winstation->clipboard;
+
+    if (!clipboard) return;
+
+    if (clipboard->open_win == window)
+    {
+        clipboard->open_win = 0;
+        clipboard->open_thread = NULL;
+    }
+    if (clipboard->owner_win == window)
+    {
+        clipboard->owner_win = 0;
+        clipboard->owner_thread = NULL;
+    }
+    if (clipboard->viewer == window) clipboard->viewer = 0;
+}
 
 /* Called when thread terminates to allow release of clipboard */
 void cleanup_clipboard_thread(struct thread *thread)

server/user.h

@@ -91,6 +91,7 @@ extern void free_process_user_handles( struct process *process );
 
 /* clipboard functions */
 
+extern void cleanup_clipboard_window( struct desktop *desktop, user_handle_t window );
 extern void cleanup_clipboard_thread( struct thread *thread );
 
 /* hook functions */

server/window.c

@@ -1855,6 +1855,7 @@ void destroy_window( struct window *win )
     if (win == progman_window) progman_window = NULL;
     if (win == taskman_window) taskman_window = NULL;
     free_hotkeys( win->desktop, win->handle );
+    cleanup_clipboard_window( win->desktop, win->handle );
     free_user_handle( win->handle );
     destroy_properties( win );
     list_remove( &win->entry );