GMarkupLabel - A C# Windows Forms control to display XML-formatted text

using System;
using System.Collections;
using System.ComponentModel;

namespace GFramework
{
    /// <summary>
    /// Represents the root of the element hierachy.
    /// </summary>
    public class GRootElement : GElement, IGServiceManager
    {
        #region Constructor

        public GRootElement()
        {
            m_Services = new Hashtable();
            m_EventListeners = new GNodeCollection(this);
        }

        #endregion

        #region Interface Implementation

        #region IGServiceManager

        public void RegisterService(object key, GService service)
        {
            if (m_Services.ContainsKey(key))
            {
                m_Services[key] = service;
            }
            else
            {
                m_Services.Add(key, service);
            }
        }
        public void UnRegisterService(object key)
        {
            if (m_Services.ContainsKey(key))
            {
                m_Services.Remove(key);
            }
        }
        public GService GetService(object key)
        {
            return (GService)m_Services[key];
        }

        #endregion

        #endregion

        #region Public Overridables

        public virtual void BeginInit()
        {
            m_InitializeLock++;
        }
        public virtual void EndInit()
        {
            m_InitializeLock--;
            m_InitializeLock = Math.Max(0, m_InitializeLock);

            if (m_InitializeLock > 0)
            {
                return;
            }

            OnEndInit();
        }

        #endregion

        #region Protected Overridables

        protected virtual void OnEndInit()
        {
            int count = m_Children.Count;
            for (int i = 0; i < count; i++)
            {
                m_Children[i].SetRoot(this);
            }
        }

        #endregion

        #region Protected Overrides

        protected internal override void OnCollectionNotification(GEventArgs e)
        {
            base.OnCollectionNotification(e);

            if (m_InitializeLock > 0)
            {
                return;
            }

            GCollectionEventData data = (GCollectionEventData)e.m_Data;

            switch (data.m_Notification)
            {
                case CollectionNotification.ElementAdded:
                case CollectionNotification.ElementInserted:
                    ((GNode)data.m_Element).SetRoot(this);
                    break;
                case CollectionNotification.ElementRemoved:
                    ((GNode)data.m_Element).SetRoot(null);
                    break;
            }
        }

        #endregion

        #region Properties

        public GNodeCollection EventListeners
        {
            get
            {
                return m_EventListeners;
            }
        }

        #endregion

        #region Fields

        [NonSerialized]
        internal int m_InitializeLock;
        [NonSerialized]
        internal GNodeCollection m_EventListeners;
        [NonSerialized]
        internal Hashtable m_Services;

        #endregion

        #region BiState Constants
        #endregion
    }
}