mcs/class/referencesource/System.Xml/System/Xml/XPath/Internal/XPathAncestorIterator.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="XPathAncestorIterator.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">[....]</owner>
   6 //------------------------------------------------------------------------------
   7
   8 namespace MS.Internal.Xml.XPath {
   9     using System;
  10     using System.Xml;
  11     using System.Xml.XPath;
  12     using System.Diagnostics;
  13     using System.Globalization;
  14
  15     internal class XPathAncestorIterator: XPathAxisIterator {
  16         public XPathAncestorIterator(XPathNavigator nav, XPathNodeType type, bool matchSelf) : base(nav, type, matchSelf) {}
  17         public XPathAncestorIterator(XPathNavigator nav, string name, string namespaceURI, bool matchSelf) : base(nav, name, namespaceURI, matchSelf) {}
  18         public XPathAncestorIterator(XPathAncestorIterator other) : base(other) { }
  19
  20         public override bool MoveNext() {
  21             if (first) {
  22                 first = false;
  23                 if(matchSelf && Matches) {
  24                     position = 1;
  25                     return true;
  26                 }
  27             }
  28
  29             while (nav.MoveToParent()) {
  30                 if (Matches) {
  31                     position ++;
  32                     return true;
  33                 }
  34             }
  35             return false;
  36         }
  37
  38         public override XPathNodeIterator Clone() { return new XPathAncestorIterator(this); }
  39     }
  40 }
  41