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//------------------------------------------------------------------------------
// <copyright file="XPathAxisIterator.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
namespace MS.Internal.Xml.XPath {
using System;
using System.Xml;
using System.Xml.XPath;
using System.Diagnostics;
using System.Globalization;
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 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;
this.uri = namespaceURI;
}
public XPathAxisIterator(XPathAxisIterator it) {
this.nav = it.nav.Clone();
this.type = it.type;
this.name = it.name;
this.uri = it.uri;
this.position = it.position;
this.matchSelf = it.matchSelf;
this.first = it.first;
}
public override XPathNavigator Current {
get { return nav; }
}
public override int CurrentPosition {
get { return position; }
}
// Nodetype Matching - Given nodetype matches the navigator's nodetype
//Given nodetype is all . So it matches everything
//Given nodetype is text - Matches text, WS, Significant WS
protected virtual bool Matches {
get {
if (name == null) {
return (
type == nav.NodeType ||
type == XPathNodeType.All ||
type == XPathNodeType.Text && (
nav.NodeType == XPathNodeType.Whitespace ||
nav.NodeType == XPathNodeType.SignificantWhitespace
)
);
} else {
return(
nav.NodeType == XPathNodeType.Element &&
(name.Length == 0 || name == nav.LocalName) &&
(uri == nav.NamespaceURI)
);
}
}
}
}
}
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