2002-12-21 Atsushi Enomoto <ginga@kit.hi-ho.ne.jp>

[mono.git] / mcs / class / System.XML / System.Xml / XmlLinkedNode.cs

diff --git a/mcs/class/System.XML/System.Xml/XmlLinkedNode.cs b/mcs/class/System.XML/System.Xml/XmlLinkedNode.cs
index 55134cfbad0cdf9d0b69952205ae49cde619a604..cc6be542fd446b6cd69324dfa922a9fbb33b7789 100644 (file)
--- a/mcs/class/System.XML/System.Xml/XmlLinkedNode.cs
+++ b/mcs/class/System.XML/System.Xml/XmlLinkedNode.cs
@@ -1,52 +1,77 @@
-// System.Xml.XmlLinkedNode.cs\r
-//\r
-// Author: Daniel Weber (daniel-weber@austin.rr.com)\r
-//\r
-// Implementation of abstract Xml.XmlLinkedNode class\r
-\r
-using System;\r
-\r
-namespace System.Xml\r
-{\r
-       public abstract class XmlLinkedNode : XmlNode\r
-       {\r
-               private XmlNode _nextSibling;\r
-               private XmlNode _previousSibling;\r
-\r
-               // ============ Properties ============================================\r
-               //=====================================================================\r
-               /// <summary>\r
-               /// Get the node immediately following this node\r
-               /// </summary>\r
-               public override XmlNode NextSibling\r
-               {\r
-                       get\r
-                       {\r
-                               return _nextSibling;\r
-                       }\r
-               }\r
-\r
-               /// <summary>\r
-               /// Get the node immediately previous to this node\r
-               /// </summary>\r
-               public override XmlNode PreviousSibling \r
-               {\r
-                       get\r
-                       {\r
-                               return _previousSibling;\r
-                       }\r
-               }\r
-\r
-               // Internal accessor methods\r
-               //===========================================================================\r
-               internal void setPreviousNode ( XmlNode previous )\r
-               {\r
-                       _previousSibling = previous;\r
-               }\r
-\r
-               internal void setNextSibling ( XmlNode next )\r
-               {\r
-                       _nextSibling = next;\r
-               }\r
-       }\r
-}
\ No newline at end of file
+//
+// System.Xml.XmlLinkedNode
+//
+// Authors:
+//   Jason Diamond <jason@injektilo.org>
+//   Kral Ferch <kral_ferch@hotmail.com>
+//
+// (C) 2002 Jason Diamond, Kral Ferch
+//
+
+using System;
+
+namespace System.Xml
+{
+       public abstract class XmlLinkedNode : XmlNode
+       {
+               #region Fields
+
+               XmlLinkedNode nextSibling;
+               XmlLinkedNode lastLinkedChild;
+
+               #endregion
+
+               #region Constructors
+               internal XmlLinkedNode(XmlDocument doc) : base(doc) { }
+
+               #endregion
+
+               #region Properties
+
+               public override XmlNode NextSibling
+               {
+                       get {
+                               if(ParentNode == null) {
+                                       return null;
+                               }
+                               else if (Object.ReferenceEquals(nextSibling, ParentNode.LastLinkedChild.NextLinkedSibling) == false) {
+                                       return nextSibling;
+                               }
+                               else {
+                                       return null;
+                               }
+                       }
+               }
+
+               internal XmlLinkedNode NextLinkedSibling
+               {
+                       get { return nextSibling; }
+                       set { nextSibling = value; }
+               }
+
+               public override XmlNode PreviousSibling
+               {
+                       get {
+                               if (ParentNode != null) {
+                                       XmlNode node = ParentNode.FirstChild;
+                                       if (node != this) {
+                                               do {
+                                                       if (node.NextSibling == this)
+                                                               return node;
+                                               } while ((node = node.NextSibling) != null);
+                                       }                                       
+                               }
+                               return null;
+                       }
+               }
+
+               // copied this way from XmlElement
+               internal override XmlLinkedNode LastLinkedChild
+               {
+                       get { return lastLinkedChild; }
+                       set { lastLinkedChild = value; }
+               }
+
+               #endregion
+       }
+}