2004-07-29 Atsushi Enomoto <[email protected]>

	* Added SubtreeXmlReader.cs.

svn path=/trunk/mcs/; revision=31600

mcs/class/System.XML/Mono.Xml/ChangeLog

@@ -1,3 +1,7 @@
+2004-07-29  Atsushi Enomoto <[email protected]>
+
+	* Added SubtreeXmlReader.cs.
+
 2004-07-13  Atsushi Enomoto <[email protected]>
 
 	* Added XmlFilterReader.cs.

mcs/class/System.XML/Mono.Xml/SubtreeXmlReader.cs

@@ -0,0 +1,230 @@
+//
+// SubtreeXmlReader.cs - reads descendant nodes in XmlReader
+//
+// Author:
+//	Atsushi Enomoto <[email protected]>
+//
+// Copyright (c) 2004 Novell Inc. All rights reserved
+//
+// 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.
+//
+
+#if NET_2_0
+
+using System;
+using System.Collections;
+using System.Xml;
+
+namespace Mono.Xml
+{
+	public class SubtreeXmlReader : XmlReader, IXmlLineInfo, IXmlNamespaceResolver
+	{
+		int startDepth;
+		bool eof;
+		bool initial;
+		bool read;
+		XmlReader Reader;
+		IXmlLineInfo li;
+		IXmlNamespaceResolver nsResolver;
+
+		public SubtreeXmlReader (XmlReader reader)
+		{
+			this.Reader = reader;
+			li = reader as IXmlLineInfo;
+			nsResolver = reader as IXmlNamespaceResolver;
+			initial = true;
+			startDepth = reader.Depth;
+			if (reader.ReadState == ReadState.Initial)
+				startDepth = -1; // end == the reader's end
+		}
+
+		public override int AttributeCount {
+			get { return initial ? 0 : Reader.AttributeCount; }
+		}
+
+		public override int Depth {
+			get { return Reader.Depth - startDepth; }
+		}
+
+		public override string BaseURI {
+			get { return Reader.BaseURI; }
+		}
+
+		public override bool EOF {
+			get { return eof || Reader.EOF; }
+		}
+
+		public int LineNumber {
+			get { return initial ? 0 : li != null ? li.LineNumber : 0; }
+		}
+
+		public int LinePosition {
+			get { return initial ? 0 : li != null ? li.LinePosition : 0; }
+		}
+
+		public override bool HasValue {
+			get { return initial ? false : Reader.HasValue; }
+		}
+
+		public override string LocalName {
+			get { return initial ? String.Empty : Reader.LocalName; }
+		}
+
+		public override string Name {
+			get { return initial ? String.Empty : Reader.Name; }
+		}
+
+		public override XmlNameTable NameTable {
+			get { return Reader.NameTable; }
+		}
+
+		public override string NamespaceURI {
+			get { return initial ? String.Empty : Reader.NamespaceURI; }
+		}
+
+		public override XmlNodeType NodeType {
+			get { return initial ? XmlNodeType.None : Reader.NodeType; }
+		}
+
+		public override string Prefix {
+			get { return initial ? String.Empty : Reader.Prefix; }
+		}
+
+		public override ReadState ReadState {
+			get { return initial ? ReadState.Initial : eof ? ReadState.EndOfFile : Reader.ReadState ; }
+		}
+
+		public override XmlReaderSettings Settings {
+			get { return Reader.Settings; }
+		}
+
+		public override string Value {
+			get { return initial ? String.Empty : Reader.Value; }
+		}
+
+		public override void Close ()
+		{
+			// do nothing
+		}
+
+		public override string GetAttribute (int i)
+		{
+			return initial ? null : Reader.GetAttribute (i);
+		}
+
+		public override string GetAttribute (string name)
+		{
+			return initial ? null : Reader.GetAttribute (name);
+		}
+
+		public override string GetAttribute (string local, string ns)
+		{
+			return initial ? null : Reader.GetAttribute (local, ns);
+		}
+
+		IDictionary IXmlNamespaceResolver.GetNamespacesInScope (XmlNamespaceScope scope)
+		{
+			return nsResolver != null ? nsResolver.GetNamespacesInScope (scope) : new Hashtable ();
+		}
+
+		public bool HasLineInfo ()
+		{
+			return li != null ? li.HasLineInfo () : false;
+		}
+
+		public override string LookupNamespace (string prefix)
+		{
+			return Reader.LookupNamespace (prefix);
+		}
+
+		string IXmlNamespaceResolver.LookupPrefix (string ns)
+		{
+			return nsResolver != null ? nsResolver.LookupPrefix (ns) : String.Empty;
+		}
+
+		string IXmlNamespaceResolver.LookupPrefix (string ns, bool atomizedNames)
+		{
+			return nsResolver != null ? nsResolver.LookupPrefix (ns, atomizedNames) : String.Empty;
+		}
+
+		public override bool MoveToFirstAttribute ()
+		{
+			return initial ? false : Reader.MoveToFirstAttribute ();
+		}
+
+		public override bool MoveToNextAttribute ()
+		{
+			return initial ? false : Reader.MoveToNextAttribute ();
+		}
+
+		public override void MoveToAttribute (int i)
+		{
+			if (!initial)
+				Reader.MoveToAttribute (i);
+		}
+
+		public override bool MoveToAttribute (string name)
+		{
+			return initial ? false : Reader.MoveToAttribute (name);
+		}
+
+		public override bool MoveToAttribute (string local, string ns)
+		{
+			return initial ? false : Reader.MoveToAttribute (local, ns);
+		}
+
+		public override bool MoveToElement ()
+		{
+			return initial ? false : Reader.MoveToElement ();
+		}
+
+		public override bool Read ()
+		{
+			if (initial) {
+				initial = false;
+				return true;
+			}
+			if (!read) {
+				read = true;
+				return !Reader.IsEmptyElement && Reader.Read ();
+			}
+			if (Reader.Depth > startDepth)
+				return Reader.Read ();
+			eof = true;
+			return false;
+		}
+
+		public override bool ReadAttributeValue ()
+		{
+			if (initial || eof)
+				return false;
+			return Reader.ReadAttributeValue ();
+		}
+
+		public override void ResolveEntity ()
+		{
+			if (initial || eof)
+				return;
+			Reader.ResolveEntity ();
+		}
+	}
+}
+
+#endif