private XmlAttribute LoadAttributeNode()
{
Debug.Assert(_reader.NodeType == XmlNodeType.Attribute);
XmlReader r = _reader;
if (r.IsDefault)
{
return(LoadDefaultAttribute());
}
XmlAttribute attr = _doc.CreateAttribute(r.Prefix, r.LocalName, r.NamespaceURI);
IXmlSchemaInfo schemaInfo = r.SchemaInfo;
if (schemaInfo != null)
{
attr.XmlName = _doc.AddAttrXmlName(attr.Prefix, attr.LocalName, attr.NamespaceURI, schemaInfo);
}
while (r.ReadAttributeValue())
{
XmlNode node;
switch (r.NodeType)
{
case XmlNodeType.Text:
node = _doc.CreateTextNode(r.Value);
break;
case XmlNodeType.EntityReference:
node = _doc.CreateEntityReference(r.LocalName);
if (r.CanResolveEntity)
{
r.ResolveEntity();
LoadAttributeValue(node, false);
// Code internally relies on the fact that an EntRef nodes has at least one child (even an empty text node). Ensure that this holds true,
// if the reader does not present any children for the ent-ref
if (node.FirstChild == null)
{
node.AppendChildForLoad(_doc.CreateTextNode(string.Empty), _doc);
}
}
break;
default:
throw UnexpectedNodeType(r.NodeType);
}
Debug.Assert(node != null);
attr.AppendChildForLoad(node, _doc);
}
return(attr);
}
// Iterates through the current attribute value's text and entity references chunks.
public override bool ReadAttributeValue()
{
if (_parsingFunction == ParsingFunction.InReadBinaryContent)
{
_parsingFunction = ParsingFunction.Read;
_readBinaryHelper.Finish();
}
if (!_coreReader.ReadAttributeValue())
{
return(false);
}
_parsingFunction = ParsingFunction.Read;
return(true);
}
// XmlReader Helper Methods
// Writes out all the attributes found at the current position in the specified XmlReader.
public virtual void WriteAttributes(XmlReader reader, bool defattr)
{
if (null == reader)
{
throw new ArgumentNullException("reader");
}
if (reader.NodeType == XmlNodeType.Element || reader.NodeType == XmlNodeType.XmlDeclaration)
{
if (reader.MoveToFirstAttribute())
{
WriteAttributes(reader, defattr);
reader.MoveToElement();
}
}
else if (reader.NodeType != XmlNodeType.Attribute)
{
throw new XmlException(ResXml.Xml_InvalidPosition, string.Empty);
}
else
{
do
{
// we need to check both XmlReader.IsDefault and XmlReader.SchemaInfo.IsDefault.
// If either of these is true and defattr=false, we should not write the attribute out
if (defattr || !reader.IsDefaultInternal)
{
WriteStartAttribute(reader.Prefix, reader.LocalName, reader.NamespaceURI);
while (reader.ReadAttributeValue())
{
if (reader.NodeType == XmlNodeType.EntityReference)
{
WriteEntityRef(reader.Name);
}
else
{
WriteString(reader.Value);
}
}
WriteEndAttribute();
}
}while (reader.MoveToNextAttribute());
}
}
private void LoadAttributeValue(XmlNode parent, bool direct)
{
XmlReader r = _reader;
while (r.ReadAttributeValue())
{
XmlNode node;
switch (r.NodeType)
{
case XmlNodeType.Text:
node = direct ? new XmlText(r.Value, _doc) : _doc.CreateTextNode(r.Value);
break;
case XmlNodeType.EndEntity:
return;
case XmlNodeType.EntityReference:
node = direct ? new XmlEntityReference(_reader.LocalName, _doc) : _doc.CreateEntityReference(_reader.LocalName);
if (r.CanResolveEntity)
{
r.ResolveEntity();
LoadAttributeValue(node, direct);
// Code internally relies on the fact that an EntRef nodes has at least one child (even an empty text node). Ensure that this holds true,
// if the reader does not present any children for the ent-ref
if (node.FirstChild == null)
{
node.AppendChildForLoad(direct ? new XmlText(string.Empty) : _doc.CreateTextNode(string.Empty), _doc);
}
}
break;
default:
throw UnexpectedNodeType(r.NodeType);
}
Debug.Assert(node != null);
parent.AppendChildForLoad(node, _doc);
}
return;
}
public override bool ReadAttributeValue()
{
return(reader.ReadAttributeValue());
}
public override bool ReadAttributeValue()
{
CheckAsync();
return(_coreReader.ReadAttributeValue());
}