XPathSingletonIterator.cs

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using System.Xml.XPath;
 
namespace MS.Internal.Xml.XPath;
 
internal sealed class XPathSingletonIterator : ResetableIterator
{
    private readonly XPathNavigator _nav;
 
    private int _position;
 
    public override XPathNavigator Current => _nav;
 
    public override int CurrentPosition => _position;
 
    public override int Count => 1;
 
    public XPathSingletonIterator(XPathNavigator nav)
    {
        _nav = nav;
    }
 
    public XPathSingletonIterator(XPathNavigator nav, bool moved)
        : this(nav)
    {
        if (moved)
        {
            _position = 1;
        }
    }
 
    public XPathSingletonIterator(XPathSingletonIterator it)
    {
        _nav = it._nav.Clone();
        _position = it._position;
    }
 
    public override XPathNodeIterator Clone()
    {
        return new XPathSingletonIterator(this);
    }
 
    public override bool MoveNext()
    {
        if (_position == 0)
        {
            _position = 1;
            return true;
        }
        return false;
    }
 
    public override void Reset()
    {
        _position = 0;
    }
}