//------------------------------------------------------------------------------
/// <copyright from='1997' to='2002' company='Microsoft Corporation'>
///    Copyright (c) Microsoft Corporation. All Rights Reserved.
///
///    This source code is intended only as a supplement to Microsoft
///    Development Tools and/or on-line documentation.  See these other
///    materials for detailed information regarding Microsoft code samples.
///
/// </copyright>
//------------------------------------------------------------------------------
namespace SampleDesignerHost
{
    using System;
	using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.ComponentModel.Design.Serialization;
    using System.Diagnostics;
    using System.Collections;
    using System.Windows.Forms;
    using System.Reflection;
    using System.Text;
    
	/// This collection keeps a list of components parallel with the host's list of
	/// sites for those components.
    internal class DesignerComponentCollection : ComponentCollection
	{
        private SampleDesignerHost host;

        internal DesignerComponentCollection(SampleDesignerHost host) : base(new IComponent[0]) {
            this.host = host;

            // Initially fill the list with site data.  After the initial fill it is up to
            // those who modify the Sites hash to update us.
            //
            if (host.Sites != null) {
                foreach(ISite site in host.Sites.Values) {
                    InnerList.Add(site.Component);
                }
            }
        }

		/// Access components from sites by name.
        public override IComponent this[string name] {
            get {
                Debug.Assert(name != null, "name is null");
                if (name == null) {
                    return null;
                }

                if (name.Length == 0) {
                    Debug.Assert(host.RootComponent != null, "base component is null");
                    return host.RootComponent;
                }

                ISite site = (ISite)host.Sites[name];
                return (site == null) ? null : site.Component;
            }
        }

        internal void Add(ISite site) {
            InnerList.Add(site.Component);
        }

        internal void Clear() {
            InnerList.Clear();
        }

        internal void Remove(ISite site) {
            InnerList.Remove(site.Component);
        }

    }
}