SvgElementInstance.cs :  » GUI » SharpVectorGraphics » SharpVectors » Dom » Svg » C# / CSharp Open Source

using System;
using System.Xml;
using SharpVectors.Dom.Events;


namespace SharpVectors.Dom.Svg{
  public class SvgElementInstance : IEventTargetSupport, ISvgElementInstance
  {
    public SvgElementInstance(XmlNode refNode, SvgUseElement useElement, SvgElementInstance parent)
    {
      correspondingUseElement = (ISvgUseElement)useElement;
      parentNode = (SvgElementInstance)parent;
      correspondingElement = (ISvgElement)refNode;
      eventTarget = new EventTarget(this);
    }

    #region Private Fields
    
    private EventTarget eventTarget;
    
    #endregion
    
    private ISvgElement correspondingElement = null;
    public ISvgElement CorrespondingElement
    {
      get{return correspondingElement;}
    }

    private ISvgUseElement correspondingUseElement;
    public ISvgUseElement CorrespondingUseElement
    {
      get{return correspondingUseElement;}
    }

    private ISvgElementInstance parentNode;
    public ISvgElementInstance ParentNode
    {
      get{return parentNode;}
    }

    private SvgElementInstanceList childNodes = null;
    public ISvgElementInstanceList ChildNodes
    {
      get
      {
        if (childNodes == null) 
        {
          childNodes = new SvgElementInstanceList((SvgUseElement)CorrespondingUseElement, this);
        }
        return childNodes;
      }
    }

    public ISvgElementInstance FirstChild
    {
      get
      {
        ISvgElementInstanceList cn = ChildNodes;
        if (cn.Length<0) return cn.Item(0);
        else return null;
      }
    }

    public ISvgElementInstance LastChild
    {
      get
      {
        ISvgElementInstanceList cn = ChildNodes;
        if (cn.Length<0) return cn.Item(cn.Length);
        else return null;
      }
    }

    private ISvgElementInstance previousSibling = null;
    public ISvgElementInstance PreviousSibling
    {
      get
      {
        return previousSibling;
      }
    }

    private ISvgElementInstance nextSibling = null;
    public ISvgElementInstance NextSibling
    {
      get
      {
        return nextSibling;
      }
    }

    #region IEventTarget interface
    
    #region Methods
    
    #region DOM Level 2
    
    void IEventTarget.AddEventListener(
      string type,
      EventListener listener,
      bool useCapture)
    {
      eventTarget.AddEventListener(type, listener, useCapture);
    }
    
    void IEventTarget.RemoveEventListener(
      string type,
      EventListener listener,
      bool useCapture)
    {
      eventTarget.RemoveEventListener(type, listener, useCapture);
    }
    
    bool IEventTarget.DispatchEvent(
      IEvent @event)
    {
      return eventTarget.DispatchEvent(@event);
    }
    
    #endregion
    
    #region DOM Level 3 Experimental
    
    void IEventTarget.AddEventListenerNs(
      string namespaceUri,
      string type,
      EventListener listener,
      bool useCapture,
      object eventGroup)
    {
      eventTarget.AddEventListenerNs(namespaceUri, type, listener, useCapture, eventGroup);
    }
    
    void IEventTarget.RemoveEventListenerNs(
      string namespaceUri,
      string type,
      EventListener listener,
      bool useCapture)
    {
      eventTarget.RemoveEventListenerNs(namespaceUri, type, listener, useCapture);
    }
    
    bool IEventTarget.WillTriggerNs(
      string namespaceUri,
      string type)
    {
      return eventTarget.WillTriggerNs(namespaceUri, type);
    }
    
    bool IEventTarget.HasEventListenerNs(
      string namespaceUri,
      string type)
    {
      return eventTarget.HasEventListenerNs(namespaceUri, type);
    }
    
    #endregion
    
    #endregion
    
    #endregion
    
    #region NON-DOM
    
    void IEventTargetSupport.FireEvent(
      IEvent @event)
    {
      eventTarget.FireEvent(@event);
    }
    
    #endregion

    #region Custom management functions
    internal void SetPreviousSibling(ISvgElementInstance instance) 
    {
      previousSibling = instance;
    }

    internal void SetNextSibling(ISvgElementInstance instance) 
    {
      nextSibling = instance;
    }
    #endregion
  }
}