Event.commandName
var commandName: string;
Description

The name of an ExecuteCommand or ValidateCommand Event.

"Copy", "Cut", "Paste", "Delete", "FrameSelected", "Duplicate", "SelectAll" and so on. Sent only in the editor.
	// Detects commands executed and prints them.
	function OnGUI() {
		var e : Event = Event.current;
		if(e.commandName != "") {
			Debug.Log("Command recognized: " + e.commandName);	
		}	
	}