55 lines
2.0 KiB
C#
55 lines
2.0 KiB
C#
|
//------------------------------------------------------------------------------
|
||
|
|
// <copyright file="ContextQuery.cs" company="Microsoft">
|
||
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
||
|
|
// </copyright>
|
||
|
|
// <owner current="true" primary="true">[....]</owner>
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
namespace MS.Internal.Xml.XPath {
|
||
|
|
using System;
|
||
|
|
using System.Xml;
|
||
|
|
using System.Xml.XPath;
|
||
|
|
using System.Diagnostics;
|
||
|
|
|
||
|
|
internal class ContextQuery : Query {
|
||
|
|
protected XPathNavigator contextNode;
|
||
|
|
|
||
|
|
public ContextQuery() {
|
||
|
|
this.count = 0;
|
||
|
|
}
|
||
|
|
protected ContextQuery(ContextQuery other) : base(other) {
|
||
|
|
this.contextNode = other.contextNode; // Don't need to clone here
|
||
|
|
}
|
||
|
|
public override void Reset() {
|
||
|
|
count = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
public override XPathNavigator Current { get { return contextNode; } }
|
||
|
|
|
||
|
|
public override object Evaluate(XPathNodeIterator context) {
|
||
|
|
contextNode = context.Current; // We don't clone here. Because we never move it.
|
||
|
|
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); }
|
||
|
|
|
||
|
|
public override XPathResultType StaticType { get { return XPathResultType.NodeSet; } }
|
||
|
|
public override int CurrentPosition { get { return count; } }
|
||
|
|
public override int Count { get { return 1; } }
|
||
|
|
public override QueryProps Properties { get { return QueryProps.Merge | QueryProps.Cached | QueryProps.Position | QueryProps.Count; } }
|
||
|
|
}
|
||
|
|
}
|