2005-06-21 Atsushi Enomoto <atsushi@ximian.com>

[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 f7b64e8a30d690c5476b4ba5059eb4ab6c98c14f..01a9b0a8444011809cd7be34bc715d74b3a8740c 100644 (file)
--- a/mcs/class/System.XML/System.Xml/XmlLinkedNode.cs
+++ b/mcs/class/System.XML/System.Xml/XmlLinkedNode.cs
@@ -1,3 +1,34 @@
+//
+// System.Xml.XmlLinkedNode
+//
+// Authors:
+//   Jason Diamond <jason@injektilo.org>
+//   Kral Ferch <kral_ferch@hotmail.com>
+//
+// (C) 2002 Jason Diamond, Kral Ferch
+//
+
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
 using System;
 
 namespace System.Xml
@@ -5,6 +36,7 @@ namespace System.Xml
        public abstract class XmlLinkedNode : XmlNode
        {
                #region Fields
+
                XmlLinkedNode nextSibling;
 
                #endregion
@@ -14,11 +46,23 @@ namespace System.Xml
 
                #endregion
 
-               #region Properties              
+               #region Properties
+               internal bool IsRooted {
+                       get {
+                               for (XmlNode n = ParentNode; n != null; n = n.ParentNode)
+                                       if (n.NodeType == XmlNodeType.Document)
+                                               return true;
+                               return false;
+                       }
+               }
+
                public override XmlNode NextSibling
                {
                        get {
-                               if (Object.ReferenceEquals(nextSibling, ParentNode.LastLinkedChild.NextLinkedSibling) == false) {
+                               if(ParentNode == null) {
+                                       return null;
+                               }
+                               else if (Object.ReferenceEquals(nextSibling, ParentNode.LastLinkedChild.NextLinkedSibling) == false) {
                                        return nextSibling;
                                }
                                else {
@@ -33,11 +77,19 @@ namespace System.Xml
                        set { nextSibling = value; }
                }
 
-               [MonoTODO]
                public override XmlNode PreviousSibling
                {
                        get {
-                               throw new NotImplementedException ();
+                               if (ParentNode != null) {
+                                       XmlNode node = ParentNode.FirstChild;
+                                       if (node != this) {
+                                               do {
+                                                       if (node.NextSibling == this)
+                                                               return node;
+                                               } while ((node = node.NextSibling) != null);
+                                       }                                       
+                               }
+                               return null;
                        }
                }