e17: add macro to get gacon client config item by id, if id is NULL get a new id.

seems almost all modules got it wrong (those with uuid counter). 
when there are two gcc and gcc 1 is removed and e is restarted 
uuid counter will be 1, so when you add a new one it will get id of gcc 2


SVN revision: 63123

src/bin/e_gadcon.h

@@ -315,5 +315,29 @@ EAPI void e_gadcon_location_unregister (E_Gadcon_Location *loc);
 EAPI void e_gadcon_location_set_icon_name(E_Gadcon_Location *loc, const char *name);
 EAPI void e_gadcon_client_add_location_menu(E_Gadcon_Client *gcc, E_Menu *menu);
 
+#define GADCON_CLIENT_CONFIG_GET(_type, _items, _gc_class, _id)		\
+  if (!_id)								\
+    {									\
+       char buf[128];							\
+       int num = 0;							\
+       _type *ci;							\
+       if (_items)							\
+	 {								\
+	    const char *p;						\
+	    ci = eina_list_last(_items)->data;				\
+	    p = strrchr (ci->id, '.');					\
+	    if (p) num = atoi (p + 1) + 1;				\
+	 }								\
+       snprintf (buf, sizeof (buf), "%s.%d", _gc_class.name, num);	\
+       _id = buf;							\
+    }									\
+  else									\
+    {									\
+       Eina_List *l;							\
+       _type *ci;							\
+       EINA_LIST_FOREACH(_items, l, ci)					\
+	 if ((ci->id) && (!strcmp(ci->id, id))) return ci;		\
+    }
+
 #endif
 #endif