ContextQuery.cs

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using System.Xml.XPath;
 
namespace MS.Internal.Xml.XPath;
 
internal class ContextQuery : Query
{
    protected XPathNavigator contextNode;
 
    public override XPathNavigator Current => contextNode;
 
    public override XPathResultType StaticType => XPathResultType.NodeSet;
 
    public override int CurrentPosition => count;
 
    public override int Count => 1;
 
    public override QueryProps Properties => (QueryProps)23;
 
    public ContextQuery()
    {
        count = 0;
    }
 
    protected ContextQuery(ContextQuery other)
        : base(other)
    {
        contextNode = other.contextNode;
    }
 
    public override void Reset()
    {
        count = 0;
    }
 
    public override object Evaluate(XPathNodeIterator context)
    {
        contextNode = context.Current;
        count = 0;
        return this;
    }
 
    public override XPathNavigator Advance()
    {
        if (count == 0)
        {
            count = 1;
            return contextNode;
        }
        return null;
    }
 
    public override XPathNavigator MatchNode(XPathNavigator current)
    {
        return current;
    }
 
    public override XPathNodeIterator Clone()
    {
        return new ContextQuery(this);
    }
}