+ // Reads XmlReader and creates Attribute Node.
+ private XmlAttribute ReadAttributeNode(XmlReader reader)
+ {
+ if(reader.NodeType == XmlNodeType.Element)
+ reader.MoveToFirstAttribute ();
+ else if(reader.NodeType != XmlNodeType.Attribute)
+ throw new InvalidOperationException (MakeReaderErrorMessage ("bad position to read attribute.", reader));
+ XmlAttribute attribute = CreateAttribute (reader.Prefix, reader.LocalName, reader.NamespaceURI);
+ ReadAttributeNodeValue (reader, attribute);
+
+ // Keep the current reader position
+ bool res;
+ if (attribute.NamespaceURI == string.Empty || attribute.NamespaceURI == null)
+ res = reader.MoveToAttribute (attribute.Name);
+ else
+ res = reader.MoveToAttribute (attribute.LocalName, attribute.NamespaceURI);
+ if (reader.IsDefault)
+ attribute.SetDefault ();
+ return attribute;
+ }
+
+ // Reads attribute from XmlReader and then creates attribute value children. XmlAttribute also uses this.
+ internal void ReadAttributeNodeValue(XmlReader reader, XmlAttribute attribute)
+ {
+ while(reader.ReadAttributeValue ()) {
+ if(reader.NodeType == XmlNodeType.EntityReference)
+ // FIXME: if DocumentType is available, then try to resolve it.
+ attribute.AppendChild (CreateEntityReference (reader.Name));
+ // FIXME: else if(NodeType == EndEntity) -- reset BaseURI and so on -- ;
+ else
+ // Children of Attribute is restricted to CharacterData and EntityReference (Comment is not allowed).
+ attribute.AppendChild (CreateTextNode (reader.Value));
+ }
+ }
+
+ public virtual XmlNode ReadNode (XmlReader reader)
+ {
+ XmlNode resultNode = null;
+ XmlNode newNode = null;
+ XmlNode currentNode = null;
+
+ switch (reader.ReadState) {
+ case ReadState.Interactive:
+ break;
+ case ReadState.Initial:
+ reader.Read ();
+ break;
+ default:
+ return null;
+ }
+
+ int startDepth = reader.Depth;
+ bool ignoredWhitespace;
+ bool reachedEOF = false;
+
+ do {
+ ignoredWhitespace = false;
+ if (reader.ReadState != ReadState.Interactive)
+ if (reachedEOF)
+ throw new Exception ("XML Reader reached to end while reading node.");
+ else
+ reachedEOF = true;
+ switch (reader.NodeType) {
+
+ case XmlNodeType.Attribute:
+ newNode = ReadAttributeNode (reader);
+ break;
+
+ case XmlNodeType.CDATA:
+ newNode = CreateCDataSection (reader.Value);
+ if(currentNode != null)
+ currentNode.AppendChild (newNode);
+ break;
+
+ case XmlNodeType.Comment:
+ newNode = CreateComment (reader.Value);
+ if(currentNode != null)
+ currentNode.AppendChild (newNode);
+ break;
+
+ case XmlNodeType.Element:
+ XmlElement element = CreateElement (reader.Prefix, reader.LocalName, reader.NamespaceURI);
+ element.IsEmpty = reader.IsEmptyElement;
+ if(currentNode != null)
+ currentNode.AppendChild (element);
+ else
+ resultNode = element;
+
+ // set the element's attributes.
+ while (reader.MoveToNextAttribute ()) {
+ element.SetAttributeNode (ReadAttributeNode (reader));
+ }
+
+ reader.MoveToElement ();
+
+ if (!reader.IsEmptyElement)
+ currentNode = element;
+
+ break;
+
+ case XmlNodeType.EndElement:
+ if (currentNode == null)
+ throw new XmlException ("Unexpected end element.");
+ else if (currentNode.Name != reader.Name)
+ throw new XmlException (reader as IXmlLineInfo, String.Format ("mismatch end tag. Expected {0} but found {1}", currentNode.Name, reader.Name));
+ currentNode = currentNode.ParentNode;
+ break;
+
+ case XmlNodeType.EndEntity:
+ break; // no operation
+
+ case XmlNodeType.ProcessingInstruction:
+ newNode = CreateProcessingInstruction (reader.Name, reader.Value);
+ if(currentNode != null)
+ currentNode.AppendChild (newNode);
+ break;
+
+ case XmlNodeType.Text:
+ newNode = CreateTextNode (reader.Value);
+ if(currentNode != null)
+ currentNode.AppendChild (newNode);
+ break;
+
+ case XmlNodeType.XmlDeclaration:
+ // empty strings are dummy, then gives over setting value contents to setter.
+ newNode = CreateXmlDeclaration ("1.0" , String.Empty, String.Empty);
+ ((XmlDeclaration)newNode).Value = reader.Value;
+ if(currentNode != null)
+ throw new XmlException (reader as IXmlLineInfo, "XmlDeclaration at invalid position.");
+ break;
+
+ case XmlNodeType.DocumentType:
+ if(currentNode != null)
+ throw new XmlException (reader as IXmlLineInfo, "XmlDocumentType at invalid position.");
+
+ DTDObjectModel dtd = null;
+ XmlTextReader xtReader = reader as XmlTextReader;
+ if (xtReader != null)
+ dtd = xtReader.DTD;
+ XmlNodeReader xnReader = reader as XmlNodeReader;
+ if (xnReader != null)
+ dtd = xnReader.GetInternalParserContext ().Dtd;
+ XmlValidatingReader xvReader = reader as XmlValidatingReader;
+ if (xvReader != null)
+ dtd = xvReader.GetInternalParserContext ().Dtd;
+ IHasXmlParserContext ctxReader = reader as IHasXmlParserContext;
+ if (ctxReader != null)
+ dtd = ctxReader.ParserContext.Dtd;
+
+ if (dtd != null)
+ newNode = CreateDocumentType (dtd);
+ else
+ newNode = CreateDocumentType (reader.Name, reader ["PUBLIC"], reader ["SYSTEM"], reader.Value);
+
+ break;
+
+ case XmlNodeType.EntityReference:
+ newNode = CreateEntityReference (reader.Name);
+ if(currentNode != null)
+ currentNode.AppendChild (newNode);
+ break;
+
+ case XmlNodeType.SignificantWhitespace:
+ newNode = CreateSignificantWhitespace (reader.Value);
+ if(currentNode != null)
+ currentNode.AppendChild (newNode);
+ break;
+
+ case XmlNodeType.Whitespace:
+ if(PreserveWhitespace) {
+ newNode = CreateWhitespace (reader.Value);
+ if(currentNode != null)
+ currentNode.AppendChild (newNode);
+ }
+ else
+ ignoredWhitespace = true;
+ break;
+ }
+ // Read next, except for reading attribute node.
+ if (!(newNode is XmlAttribute) && !reader.Read ())
+ break;
+ } while (ignoredWhitespace || reader.Depth > startDepth ||
+ (reader.Depth == startDepth && reader.NodeType == XmlNodeType.EndElement));
+ if (startDepth != reader.Depth && reader.EOF)
+ throw new XmlException ("Unexpected end of xml reader.");
+ return resultNode != null ? resultNode : newNode;
+ }
+
+ private string MakeReaderErrorMessage (string message, XmlReader reader)
+ {
+ IXmlLineInfo li = reader as IXmlLineInfo;
+ if (li != null)
+ return String.Format ("{0} Line number = {1}, Inline position = {2}.", message, li.LineNumber, li.LinePosition);
+ else
+ return message;
+ }
+
+ internal void RemoveIdenticalAttribute (string id)