XPathAxisIterator.cs

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using System;
using System.Xml.XPath;
 
namespace MS.Internal.Xml.XPath;
 
internal abstract class XPathAxisIterator : XPathNodeIterator
{
    internal XPathNavigator nav;
 
    internal XPathNodeType type;
 
    internal string name;
 
    internal string uri;
 
    internal int position;
 
    internal bool matchSelf;
 
    internal bool first = true;
 
    public override XPathNavigator Current => nav;
 
    public override int CurrentPosition => position;
 
    protected virtual bool Matches
    {
        get
        {
            if (name == null)
            {
                if (type != nav.NodeType && type != XPathNodeType.All)
                {
                    if (type == XPathNodeType.Text)
                    {
                        if (nav.NodeType != XPathNodeType.Whitespace)
                        {
                            return nav.NodeType == XPathNodeType.SignificantWhitespace;
                        }
                        return true;
                    }
                    return false;
                }
                return true;
            }
            if (nav.NodeType == XPathNodeType.Element && (name.Length == 0 || name == nav.LocalName))
            {
                return uri == nav.NamespaceURI;
            }
            return false;
        }
    }
 
    public XPathAxisIterator(XPathNavigator nav, bool matchSelf)
    {
        this.nav = nav;
        this.matchSelf = matchSelf;
    }
 
    public XPathAxisIterator(XPathNavigator nav, XPathNodeType type, bool matchSelf)
        : this(nav, matchSelf)
    {
        this.type = type;
    }
 
    public XPathAxisIterator(XPathNavigator nav, string name, string namespaceURI, bool matchSelf)
        : this(nav, matchSelf)
    {
        if (name == null)
        {
            throw new ArgumentNullException("name");
        }
        if (namespaceURI == null)
        {
            throw new ArgumentNullException("namespaceURI");
        }
        this.name = name;
        uri = namespaceURI;
    }
 
    public XPathAxisIterator(XPathAxisIterator it)
    {
        nav = it.nav.Clone();
        type = it.type;
        name = it.name;
        uri = it.uri;
        position = it.position;
        matchSelf = it.matchSelf;
        first = it.first;
    }
}