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

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

using SharpVectors.Dom.Css;

namespace SharpVectors.Dom.Svg{
    /// <summary>
    /// A class to encapsulate all SvgTest functionality.  Used by SVG elements as a helper class
    /// </summary>
    /// <developer>kevin@kevlindev.com</developer>
  public class SvgTests : ISvgTests
  {
        #region Constructor
    public SvgTests(SvgElement ownerElement)
    {
      this.ownerElement = ownerElement;
      this.ownerElement.attributeChangeHandler += new NodeChangeHandler(AttributeChange);
        }
        #endregion

    #region Private fields
    private SvgElement ownerElement;
    #endregion

        #region ISvgTest Interface
    private SvgStringList requiredFeatures;
        public ISvgStringList RequiredFeatures
        {
            get 
      { 
        if(requiredFeatures == null)
        {
                    requiredFeatures = new SvgStringList(ownerElement.GetAttribute("requiredFeatures"));
        }
        return requiredFeatures; 
      }
        }

        
    private SvgStringList requiredExtensions;
    public ISvgStringList RequiredExtensions
        {
      get 
      { 
        if(requiredExtensions == null)
        {
          requiredExtensions = new SvgStringList(ownerElement.GetAttribute("requiredExtensions"));
        }
        return requiredExtensions; 
      }
        }

        
    private SvgStringList systemLanguage;
    public ISvgStringList SystemLanguage
        {
      get 
      { 
        if(systemLanguage == null)
        {
          systemLanguage = new SvgStringList(ownerElement.GetAttribute("systemLanguage"));
        }
        return systemLanguage; 
      }
        }

        public bool HasExtension(string extension)
        {
            bool result = false;

      for ( uint i = 0; i < RequiredExtensions.NumberOfItems; i++ )
            {
                if ( RequiredExtensions.GetItem(i) == extension )
                {
                    result = true;
                    break;
                }
            }
            
            return result;
        }
        #endregion

    #region Update handling
    private void AttributeChange(Object src, XmlNodeChangedEventArgs args)
    {
      XmlAttribute attribute = src as XmlAttribute;

      if(attribute.NamespaceURI.Length == 0)
      {
        switch(attribute.LocalName)
        {
          case "requiredFeatures":
            requiredFeatures = null;
            break;
          case "requiredExtensions":
            requiredExtensions = null;
            break;
          case "systemLanguage":
            systemLanguage = null;
            break;
        }
      }
    }
    #endregion
  }
}