Event.commandName
var commandName: string;
string commandName;
commandName as 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);	
		}	
	}
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void OnGUI() {
        Event e = Event.current;
        if (e.commandName != "")
            Debug.Log("Command recognized: " + e.commandName);
        
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def OnGUI() as void:
		e as Event = Event.current
		if e.commandName != '':
			Debug.Log(('Command recognized: ' + e.commandName))