mcs/class/System.XML/System.Xml/XmlLinkedNode.cs

   1 //
   2 // System.Xml.XmlLinkedNode
   3 //
   4 // Authors:
   5 //   Jason Diamond <jason@injektilo.org>
   6 //   Kral Ferch <kral_ferch@hotmail.com>
   7 //
   8 // (C) 2002 Jason Diamond, Kral Ferch
   9 //
  10
  11 using System;
  12
  13 namespace System.Xml
  14 {
  15         public abstract class XmlLinkedNode : XmlNode
  16         {
  17                 #region Fields
  18
  19                 XmlLinkedNode nextSibling;
  20
  21                 #endregion
  22
  23                 #region Constructors
  24                 internal XmlLinkedNode(XmlDocument doc) : base(doc) { }
  25
  26                 #endregion
  27
  28                 #region Properties
  29
  30                 public override XmlNode NextSibling
  31                 {
  32                         get {
  33                                 if(ParentNode == null) {
  34                                         return null;
  35                                 }
  36                                 else if (Object.ReferenceEquals(nextSibling, ParentNode.LastLinkedChild.NextLinkedSibling) == false) {
  37                                         return nextSibling;
  38                                 }
  39                                 else {
  40                                         return null;
  41                                 }
  42                         }
  43                 }
  44
  45                 internal XmlLinkedNode NextLinkedSibling
  46                 {
  47                         get { return nextSibling; }
  48                         set { nextSibling = value; }
  49                 }
  50
  51                 public override XmlNode PreviousSibling
  52                 {
  53                         get {
  54                                 if (ParentNode != null) {
  55                                         XmlNode node = ParentNode.FirstChild;
  56                                         if (node != this) {
  57                                                 do {
  58                                                         if (node.NextSibling == this)
  59                                                                 return node;
  60                                                 } while ((node = node.NextSibling) != null);
  61                                         }
  62                                 }
  63                                 return null;
  64                         }
  65                 }
  66
  67                 #endregion
  68         }
  69 }