File: RestoreStateAction.cs

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//  RestoreStateAction.cs
//
//  GNOME Do is the legal property of its developers.
//  Please refer to the COPYRIGHT file distributed with this
//  source distribution.
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

using System;
using System.Linq;
using System.Diagnostics;
using System.Collections.Generic;
using System.Threading;
using Mono.Addins;

using Do.Universe;

namespace VirtualBox
{
	//restore from snapshot
	public class RestoreFromSnapshot : Act
	{
		public RestoreFromSnapshot ()
		{
		}

		public override string Name {
			get { return AddinManager.CurrentLocalizer.GetString("Discard State"); }
		}

		public override string Description {
			get { return AddinManager.CurrentLocalizer.GetString("Restore VM state to current Snapshot"); }
		}

		public override string Icon {
			get { return "vm_discard_32px.png@"+GetType().Assembly.FullName; }
		}

		public override IEnumerable<Type> SupportedItemTypes {
			get {
				yield return typeof (VMItem);
			}
		}

		public override bool SupportsItem (Item item) {
			//only allow "restoring shapshot" of a machine if it is off
			VMItem v = item as VMItem;
			if (((v.Status == VMState.off) || (v.Status == VMState.saved)) && (v.HasSavedStates == true))
				return true;
			else return false;
		}
		
		public override IEnumerable<Item> Perform (IEnumerable<Item> items, IEnumerable<Item> modifierItems)
		{
			VMItem vm = items.First () as VMItem;
			
			VMThread thread = new VMThread("VBoxManage", "snapshot " + vm.Uuid + " discardcurrent -state", vm.Status, ref vm);
			Thread t = new Thread (new ThreadStart(thread.DoAction));
			t.IsBackground = true;
			t.Start(); 
			yield break;
		}
	}
}