private bool ReadNextNode()
{
// attributes must not be taken into account while enumerating nodes
if (CurrentEnumerator is IEnumerator <IXmlAttributeBuilder> )
{
_nodeType = XmlNodeType.Element;
_enumerators.RemoveLast();
}
// ensure child nodes are enumerated
if (_nodeType == XmlNodeType.Element && CurrentNode.HasChildNodes())
{
_enumerators.AddLast(CurrentNode.GetChildNodes().GetConservativeEnumerator());
}
// loop so as to skip empty Text nodes
while (CurrentEnumerator.MoveNext())
{
if (CurrentNode is IXmlElementBuilder)
{
_nodeType = XmlNodeType.Element;
return(true);
}
if (CurrentNode is IXmlTextBuilder)
{
if (!CurrentNode.Value.IsNullOrEmpty())
{
_nodeType = XmlNodeType.Text;
return(true);
}
}
else
{
throw new NotImplementedException();
}
}
_enumerators.RemoveLast();
// a non-empty element ---its children have just been enumerated--- requires an extra Read() for the closing tag
if (CurrentNode is IXmlElementBuilder)
{
_nodeType = XmlNodeType.EndElement;
return(true);
}
_nodeType = XmlNodeType.None;
return(false);
}