73 lines
2.6 KiB
C#
73 lines
2.6 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="followingquery.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">[....]</owner>
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//------------------------------------------------------------------------------
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namespace MS.Internal.Xml.XPath {
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using System;
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using System.Xml;
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using System.Xml.XPath;
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using System.Diagnostics;
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internal sealed class FollowingQuery : BaseAxisQuery {
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private XPathNavigator input;
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private XPathNodeIterator iterator;
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public FollowingQuery(Query qyInput, string name, string prefix, XPathNodeType typeTest) : base(qyInput, name, prefix, typeTest) {}
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private FollowingQuery(FollowingQuery other) : base(other) {
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this.input = Clone(other.input);
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this.iterator = Clone(other.iterator);
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}
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public override void Reset() {
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iterator = null;
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base.Reset();
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}
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public override XPathNavigator Advance() {
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if (iterator == null) {
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input = qyInput.Advance();
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if (input == null) {
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return null;
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}
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XPathNavigator prev;
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do {
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prev = input.Clone();
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input = qyInput.Advance();
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} while (prev.IsDescendant(input));
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input = prev;
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iterator = XPathEmptyIterator.Instance;
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}
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while (! iterator.MoveNext()) {
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bool matchSelf;
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if (input.NodeType == XPathNodeType.Attribute || input.NodeType == XPathNodeType.Namespace) {
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input.MoveToParent();
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matchSelf = false;
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} else {
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while (! input.MoveToNext()) {
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if (! input.MoveToParent()) {
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return null;
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}
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}
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matchSelf = true;
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}
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if (NameTest) {
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iterator = input.SelectDescendants(Name, Namespace, matchSelf);
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} else {
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iterator = input.SelectDescendants(TypeTest, matchSelf);
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}
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}
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position++;
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currentNode = iterator.Current;
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return currentNode;
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}
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public override XPathNodeIterator Clone() { return new FollowingQuery(this); }
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}
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}
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