66 lines
2.4 KiB
C#
66 lines
2.4 KiB
C#
|
//------------------------------------------------------------------------------
|
||
|
|
// <copyright file="AttributeQuery.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;
|
||
|
|
using System.Globalization;
|
||
|
|
|
||
|
|
internal sealed class AttributeQuery : BaseAxisQuery {
|
||
|
|
private bool onAttribute = false;
|
||
|
|
|
||
|
|
public AttributeQuery(Query qyParent, string Name, string Prefix, XPathNodeType Type) : base(qyParent, Name, Prefix, Type) {}
|
||
|
|
private AttributeQuery(AttributeQuery other) : base(other) {
|
||
|
|
this.onAttribute = other.onAttribute;
|
||
|
|
}
|
||
|
|
public override void Reset() {
|
||
|
|
onAttribute = false;
|
||
|
|
base.Reset();
|
||
|
|
}
|
||
|
|
|
||
|
|
public override XPathNavigator Advance() {
|
||
|
|
while (true) {
|
||
|
|
if (! onAttribute) {
|
||
|
|
currentNode = qyInput.Advance();
|
||
|
|
if (currentNode == null) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
position = 0;
|
||
|
|
currentNode = currentNode.Clone();
|
||
|
|
onAttribute = currentNode.MoveToFirstAttribute();
|
||
|
|
} else {
|
||
|
|
onAttribute = currentNode.MoveToNextAttribute();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (onAttribute) {
|
||
|
|
Debug.Assert(! currentNode.NamespaceURI.Equals(XmlReservedNs.NsXmlNs));
|
||
|
|
if (matches(currentNode)) {
|
||
|
|
position++;
|
||
|
|
return currentNode;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} // while
|
||
|
|
}
|
||
|
|
|
||
|
|
public override XPathNavigator MatchNode(XPathNavigator context) {
|
||
|
|
if (context != null) {
|
||
|
|
if (context.NodeType == XPathNodeType.Attribute && matches(context)) {
|
||
|
|
XPathNavigator temp = context.Clone();
|
||
|
|
if (temp.MoveToParent()) {
|
||
|
|
return qyInput.MatchNode(temp);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
public override XPathNodeIterator Clone() { return new AttributeQuery(this); }
|
||
|
|
}
|
||
|
|
}
|