. ]]> This interface allows to coordinate whether the server should create a server-side window decoration around a wl_surface representing a shell surface (wl_shell_surface or similar). By announcing support for this interface the server indicates that it supports server side decorations. When a client creates a server-side decoration object it indicates that it supports the protocol. The client is supposed to tell the server whether it wants server-side decorations or will provide client-side decorations. If the client does not create a server-side decoration object for a surface the server interprets this as lack of support for this protocol and considers it as client-side decorated. Nevertheless a client-side decorated surface should use this protocol to indicate to the server that it does not want a server-side deco. This event is emitted directly after binding the interface. It contains the default mode for the decoration. When a new server decoration object is created this new object will be in the default mode until the first request_mode is requested. The server may change the default mode at any time. This event is emitted directly after the decoration is created and represents the base decoration policy by the server. E.g. a server which wants all surfaces to be client-side decorated will send Client, a server which wants server-side decoration will send Server. The client can request a different mode through the decoration request. The server will acknowledge this by another event with the same mode. So even if a server prefers server-side decoration it's possible to force a client-side decoration. The server may emit this event at any time. In this case the client can again request a different mode. It's the responsibility of the server to prevent a feedback loop.