NamespaceQuery.cs

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using System.Xml.XPath;
 
namespace MS.Internal.Xml.XPath;
 
internal sealed class NamespaceQuery : BaseAxisQuery
{
    private bool _onNamespace;
 
    public NamespaceQuery(Query qyParent, string Name, string Prefix, XPathNodeType Type)
        : base(qyParent, Name, Prefix, Type)
    {
    }
 
    private NamespaceQuery(NamespaceQuery other)
        : base(other)
    {
        _onNamespace = other._onNamespace;
    }
 
    public override void Reset()
    {
        _onNamespace = false;
        base.Reset();
    }
 
    public override XPathNavigator Advance()
    {
        do
        {
            if (!_onNamespace)
            {
                currentNode = qyInput.Advance();
                if (currentNode == null)
                {
                    return null;
                }
                position = 0;
                currentNode = currentNode.Clone();
                _onNamespace = currentNode.MoveToFirstNamespace();
            }
            else
            {
                _onNamespace = currentNode.MoveToNextNamespace();
            }
        }
        while (!_onNamespace || !matches(currentNode));
        position++;
        return currentNode;
    }
 
    public override bool matches(XPathNavigator e)
    {
        if (e.Value.Length == 0)
        {
            return false;
        }
        if (base.NameTest)
        {
            return base.Name.Equals(e.LocalName);
        }
        return true;
    }
 
    public override XPathNodeIterator Clone()
    {
        return new NamespaceQuery(this);
    }
}