server: Add a request to empty the clipboard.

dlls/user32/clipboard.c

@@ -71,30 +71,6 @@ static BOOL bCBHasChanged = FALSE;
 
 
 /**************************************************************************
- *                      CLIPBOARD_SetClipboardOwner
- *
- * Set the global wineserver clipboard owner. The current process will
- * be the owner and <hWnd> will get the render notifications.
- */
-static BOOL CLIPBOARD_SetClipboardOwner(HWND hWnd)
-{
-    BOOL bRet;
-
-    TRACE(" hWnd(%p)\n", hWnd);
-
-    SERVER_START_REQ( set_clipboard_info )
-    {
-        req->flags = SET_CB_OWNER;
-        req->owner = wine_server_user_handle( hWnd );
-        bRet = !wine_server_call_err( req );
-    }
-    SERVER_END_REQ;
-
-    return bRet;
-}
-
-
-/**************************************************************************
  *                      CLIPBOARD_GetClipboardInfo
  */
 static BOOL CLIPBOARD_GetClipboardInfo(LPCLIPBOARDINFO cbInfo)
@@ -256,39 +232,25 @@ BOOL WINAPI CloseClipboard(void)
  */
 BOOL WINAPI EmptyClipboard(void)
 {
-    CLIPBOARDINFO cbinfo;
+    BOOL ret;
+    HWND owner = GetClipboardOwner();
 
     TRACE("()\n");
 
-    if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
-        ~cbinfo.flags & CB_OPEN)
+    if (owner) SendMessageTimeoutW( owner, WM_DESTROYCLIPBOARD, 0, 0, SMTO_ABORTIFHUNG, 5000, NULL );
+
+    SERVER_START_REQ( empty_clipboard )
     {
-        WARN("Clipboard not opened by calling task!\n");
-        SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
-        return FALSE;
+        ret = !wine_server_call_err( req );
     }
+    SERVER_END_REQ;
 
-    /* Destroy private objects */
-    if (cbinfo.hWndOwner)
-        SendMessageW(cbinfo.hWndOwner, WM_DESTROYCLIPBOARD, 0, 0);
-
-    /* Tell the driver to acquire the selection. The current owner
-     * will be signaled to delete its own cache. */
-
-    /* Assign ownership of the clipboard to the current client. We do
-     * this before acquiring the selection so that when we do acquire the
-     * selection and the selection loser gets notified, it can check if
-     * it has lost the Wine clipboard ownership. If it did then it knows
-     * that a WM_DESTROYCLIPBOARD has already been sent. Otherwise it
-     * lost the selection to a X app and it should send the
-     * WM_DESTROYCLIPBOARD itself. */
-    CLIPBOARD_SetClipboardOwner(cbinfo.hWndOpen);
-
+    if (ret)
+    {
         USER_Driver->pEmptyClipboard();
-
         bCBHasChanged = TRUE;
-
-    return TRUE;
+    }
+    return ret;
 }
 
 

dlls/user32/tests/clipboard.c

@@ -408,7 +408,7 @@ static DWORD WINAPI clipboard_thread(void *param)
     if (pGetClipboardSequenceNumber)
     {
         seq = pGetClipboardSequenceNumber();
-        todo_wine ok( (int)(seq - old_seq) > 0, "sequence unchanged\n" );
+        ok( (int)(seq - old_seq) > 0, "sequence unchanged\n" );
         old_seq = seq;
     }
     count = SendMessageA( win, WM_USER+1, 0, 0 );
@@ -424,7 +424,7 @@ static DWORD WINAPI clipboard_thread(void *param)
     if (pGetClipboardSequenceNumber)
     {
         seq = pGetClipboardSequenceNumber();
-        todo_wine ok( (int)(seq - old_seq) > 0, "sequence unchanged\n" );
+        ok( (int)(seq - old_seq) > 0, "sequence unchanged\n" );
         old_seq = seq;
     }
     count = SendMessageA( win, WM_USER+1, 0, 0 );

include/wine/server_protocol.h

@@ -4381,7 +4381,6 @@ struct set_clipboard_info_reply
 };
 
 #define SET_CB_OPEN      0x001
-#define SET_CB_OWNER     0x002
 #define SET_CB_VIEWER    0x004
 #define SET_CB_SEQNO     0x008
 #define SET_CB_RELOWNER  0x010
@@ -4392,6 +4391,18 @@ struct set_clipboard_info_reply
 
 
 
+struct empty_clipboard_request
+{
+    struct request_header __header;
+    char __pad_12[4];
+};
+struct empty_clipboard_reply
+{
+    struct reply_header __header;
+};
+
+
+
 struct open_token_request
 {
     struct request_header __header;
@@ -5462,6 +5473,7 @@ enum request
     REQ_destroy_class,
     REQ_set_class_info,
     REQ_set_clipboard_info,
+    REQ_empty_clipboard,
     REQ_open_token,
     REQ_set_global_windows,
     REQ_adjust_token_privileges,
@@ -5734,6 +5746,7 @@ union generic_request
     struct destroy_class_request destroy_class_request;
     struct set_class_info_request set_class_info_request;
     struct set_clipboard_info_request set_clipboard_info_request;
+    struct empty_clipboard_request empty_clipboard_request;
     struct open_token_request open_token_request;
     struct set_global_windows_request set_global_windows_request;
     struct adjust_token_privileges_request adjust_token_privileges_request;
@@ -6004,6 +6017,7 @@ union generic_reply
     struct destroy_class_reply destroy_class_reply;
     struct set_class_info_reply set_class_info_reply;
     struct set_clipboard_info_reply set_clipboard_info_reply;
+    struct empty_clipboard_reply empty_clipboard_reply;
     struct open_token_reply open_token_reply;
     struct set_global_windows_reply set_global_windows_reply;
     struct adjust_token_privileges_reply adjust_token_privileges_reply;
@@ -6059,6 +6073,6 @@ union generic_reply
     struct terminate_job_reply terminate_job_reply;
 };
 
-#define SERVER_PROTOCOL_VERSION 475
+#define SERVER_PROTOCOL_VERSION 476
 
 #endif /* __WINE_WINE_SERVER_PROTOCOL_H */

server/clipboard.c

@@ -160,18 +160,6 @@ static int close_clipboard( struct clipboard *clipboard )
     return 1;
 }
 
-static int set_clipboard_owner( struct clipboard *clipboard, user_handle_t win )
-{
-    if (clipboard->open_thread && clipboard->open_thread->process != current->process)
-    {
-        set_error(STATUS_WAS_LOCKED);
-        return 0;
-    }
-    clipboard->owner_win = get_user_full_handle( win );
-    clipboard->owner_thread = current;
-    return 1;
-}
-
 static int release_clipboard_owner( struct clipboard *clipboard, user_handle_t win )
 {
     if ((clipboard->open_thread && clipboard->open_thread->process != current->process) ||
@@ -216,11 +204,7 @@ DECL_HANDLER(set_clipboard_info)
         if (!close_clipboard( clipboard )) return;
     }
 
-    if (req->flags & SET_CB_OWNER)
-    {
-        if (!set_clipboard_owner( clipboard, req->owner )) return;
-    }
-    else if (req->flags & SET_CB_RELOWNER)
+    if (req->flags & SET_CB_RELOWNER)
     {
         if (!release_clipboard_owner( clipboard, req->owner )) return;
     }
@@ -236,3 +220,21 @@ DECL_HANDLER(set_clipboard_info)
     if (clipboard->owner_thread && clipboard->owner_thread->process == current->process)
         reply->flags |= CB_PROCESS;
 }
+
+
+/* empty the clipboard and grab ownership */
+DECL_HANDLER(empty_clipboard)
+{
+    struct clipboard *clipboard = get_process_clipboard();
+
+    if (!clipboard) return;
+
+    if (clipboard->open_thread != current)
+    {
+        set_win32_error( ERROR_CLIPBOARD_NOT_OPEN );
+        return;
+    }
+    clipboard->owner_win = clipboard->open_win;
+    clipboard->owner_thread = clipboard->open_thread;
+    clipboard->seqno++;
+}

server/protocol.def

@@ -3087,7 +3087,6 @@ enum coords_relative
 @END
 
 #define SET_CB_OPEN      0x001
-#define SET_CB_OWNER     0x002
 #define SET_CB_VIEWER    0x004
 #define SET_CB_SEQNO     0x008
 #define SET_CB_RELOWNER  0x010
@@ -3097,6 +3096,11 @@ enum coords_relative
 #define CB_PROCESS       0x100
 
 
+/* Empty the clipboard and grab ownership */
+@REQ(empty_clipboard)
+@END
+
+
 /* Open a security token */
 @REQ(open_token)
     obj_handle_t   handle;    /* handle to the thread or process */

server/request.h

@@ -318,6 +318,7 @@ DECL_HANDLER(create_class);
 DECL_HANDLER(destroy_class);
 DECL_HANDLER(set_class_info);
 DECL_HANDLER(set_clipboard_info);
+DECL_HANDLER(empty_clipboard);
 DECL_HANDLER(open_token);
 DECL_HANDLER(set_global_windows);
 DECL_HANDLER(adjust_token_privileges);
@@ -589,6 +590,7 @@ static const req_handler req_handlers[REQ_NB_REQUESTS] =
     (req_handler)req_destroy_class,
     (req_handler)req_set_class_info,
     (req_handler)req_set_clipboard_info,
+    (req_handler)req_empty_clipboard,
     (req_handler)req_open_token,
     (req_handler)req_set_global_windows,
     (req_handler)req_adjust_token_privileges,
@@ -1989,6 +1991,7 @@ C_ASSERT( FIELD_OFFSET(struct set_clipboard_info_reply, old_owner) == 16 );
 C_ASSERT( FIELD_OFFSET(struct set_clipboard_info_reply, old_viewer) == 20 );
 C_ASSERT( FIELD_OFFSET(struct set_clipboard_info_reply, seqno) == 24 );
 C_ASSERT( sizeof(struct set_clipboard_info_reply) == 32 );
+C_ASSERT( sizeof(struct empty_clipboard_request) == 16 );
 C_ASSERT( FIELD_OFFSET(struct open_token_request, handle) == 12 );
 C_ASSERT( FIELD_OFFSET(struct open_token_request, access) == 16 );
 C_ASSERT( FIELD_OFFSET(struct open_token_request, attributes) == 20 );

server/trace.c

@@ -3639,6 +3639,10 @@ static void dump_set_clipboard_info_reply( const struct set_clipboard_info_reply
     fprintf( stderr, ", seqno=%08x", req->seqno );
 }
 
+static void dump_empty_clipboard_request( const struct empty_clipboard_request *req )
+{
+}
+
 static void dump_open_token_request( const struct open_token_request *req )
 {
     fprintf( stderr, " handle=%04x", req->handle );
@@ -4434,6 +4438,7 @@ static const dump_func req_dumpers[REQ_NB_REQUESTS] = {
     (dump_func)dump_destroy_class_request,
     (dump_func)dump_set_class_info_request,
     (dump_func)dump_set_clipboard_info_request,
+    (dump_func)dump_empty_clipboard_request,
     (dump_func)dump_open_token_request,
     (dump_func)dump_set_global_windows_request,
     (dump_func)dump_adjust_token_privileges_request,
@@ -4702,6 +4707,7 @@ static const dump_func reply_dumpers[REQ_NB_REQUESTS] = {
     (dump_func)dump_destroy_class_reply,
     (dump_func)dump_set_class_info_reply,
     (dump_func)dump_set_clipboard_info_reply,
+    NULL,
     (dump_func)dump_open_token_reply,
     (dump_func)dump_set_global_windows_reply,
     (dump_func)dump_adjust_token_privileges_reply,
@@ -4970,6 +4976,7 @@ static const char * const req_names[REQ_NB_REQUESTS] = {
     "destroy_class",
     "set_class_info",
     "set_clipboard_info",
+    "empty_clipboard",
     "open_token",
     "set_global_windows",
     "adjust_token_privileges",