xenadmin/XenAdmin/Commands/ChangeControlDomainMemoryCommand.cs

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using System.Collections.Generic;
using XenAPI;
using XenAdmin.Core;
using XenAdmin.Dialogs;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Launches the Control Domain Memory dialog.
    /// </summary>
    internal class ChangeControlDomainMemoryCommand : Command
    {
        /// <summary>
        /// Initializes a new instance of this Command. The parameter-less constructor is required if 
        /// this Command is to be attached to a ToolStrip menu item or button. It should not be used in any other scenario.
        /// </summary>
        public ChangeControlDomainMemoryCommand()
        {
        }

        public ChangeControlDomainMemoryCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection)
            : base(mainWindow, selection)
        {
        }


        protected override void RunCore(SelectedItemCollection selection)
        {
            var host = selection[0].HostAncestor;
            if (host == null)
                return;

            using (var dlg = new ControlDomainMemoryDialog(host))
                dlg.ShowDialog(Program.MainWindow);
        }

        protected override bool ConfirmationRequired
        {
            get { return false; }
        }
        
        private bool CanRun(Host host)
        {
            return host != null && host.IsLive() && Helpers.ElyOrGreater(host);
        }

        protected override bool CanRunCore(SelectedItemCollection selection)
        {
            return selection.ContainsOneItemOfType<Host>() && selection.AtLeastOneXenObjectCan<Host>(CanRun);
        }

        public override string MenuText
        {
            get
            {
                return Messages.HOST_MENU_CONTROL_DOMAIN_MEMORY;
            }
        }
    }
}