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

using System;
using System.Collections;
using System.Xml;


namespace SharpVectors.Dom.Svg{
  public class SvgElementInstanceList : ISvgElementInstanceList
  {
    #region Constructors
    public SvgElementInstanceList(SvgUseElement useElement, SvgElementInstance parent)
    {
      if (parent.CorrespondingElement == null) 
      {
        // Handle non SVGElement cases
        items = new SvgElementInstance[0];
      } 
      else if (parent.CorrespondingElement is ISvgUseElement) 
      {
        // Handle recursive SVGUseElement cases
        items = new SvgElementInstance[1];
        items[0] = (SvgElementInstance)((ISvgUseElement)parent).InstanceRoot;
        return;
      } 
      else 
      {
        XmlNodeList xmlChildNodes = parent.CorrespondingElement.ChildNodes;
        for (int i = 0; i < xmlChildNodes.Count; i++) 
        {
          items[i] = new SvgElementInstance(xmlChildNodes[i], useElement, parent);
          if (i > 0) 
          {
            items[i].SetPreviousSibling(items[i-1]);
            items[i-1].SetNextSibling(items[i]);
          }
        }
      }
    }
    #endregion

    #region Private fields
    private SvgElementInstance[] items;
    #endregion

    #region Implementation of ISvgElementInstanceList
    public ulong Length
    {
      get
      {
        return (ulong)items.GetLength(0);
      }
    }

    public ISvgElementInstance Item(ulong index)
    {
      if(index<Length)
      {
        return (ISvgElementInstance)items.GetValue((int) index);
      }
      else return null;
    }
    #endregion
  }
}