Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Xml/System/Xml/Dom/XmlUnspecifiedAttribute.cs

@@ -0,0 +1,81 @@
+//------------------------------------------------------------------------------
+// <copyright file="XmlUnspecifiedAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace System.Xml
+{
+    using System;
+
+    internal class XmlUnspecifiedAttribute: XmlAttribute {
+        bool fSpecified = false;
+
+
+        protected internal XmlUnspecifiedAttribute( string prefix, string localName, string namespaceURI, XmlDocument doc )
+        : base( prefix, localName, namespaceURI, doc ) {
+        }
+
+        public override bool Specified
+        {
+            get { return fSpecified;}
+        }
+
+
+        public override XmlNode CloneNode(bool deep) {
+            //CloneNode is deep for attributes irrespective of parameter
+            XmlDocument doc = OwnerDocument;
+            XmlUnspecifiedAttribute attr = (XmlUnspecifiedAttribute)doc.CreateDefaultAttribute(Prefix, LocalName, NamespaceURI);
+            attr.CopyChildren( doc, this, true );
+            attr.fSpecified = true; //When clone, should return the specifed attribute as default
+            return attr;
+        }
+
+        public override string InnerText {
+            set {
+                base.InnerText = value;
+                fSpecified = true;
+            }
+        }
+
+        public override XmlNode InsertBefore(XmlNode newChild, XmlNode refChild) {
+            XmlNode node = base.InsertBefore( newChild, refChild );
+            fSpecified = true;
+            return node;
+        }
+
+        public override XmlNode InsertAfter(XmlNode newChild, XmlNode refChild) {
+            XmlNode node = base.InsertAfter( newChild, refChild );
+            fSpecified = true;
+            return node;
+        }
+
+        public override XmlNode ReplaceChild(XmlNode newChild, XmlNode oldChild) {
+            XmlNode node = base.ReplaceChild( newChild, oldChild );
+            fSpecified = true;
+            return node;
+        }
+
+        public override XmlNode RemoveChild(XmlNode oldChild) {
+            XmlNode node = base.RemoveChild(oldChild);
+            fSpecified = true;
+            return node;
+        }
+
+        public override XmlNode AppendChild(XmlNode newChild) {
+            XmlNode node = base.AppendChild(newChild);
+            fSpecified = true;
+            return node;
+        }
+
+        public override void WriteTo(XmlWriter w) {
+            if (fSpecified)
+                base.WriteTo( w );
+        }
+
+        internal void SetSpecified(bool f) {
+            fSpecified = f;
+        }
+    }
+}