/// <summary>
/// Tokenizes the XML in a <see cref="XmlReader"/> to a sequence of <see cref="FragmentToken"/>.
/// </summary>
/// <param name="reader">
/// The reader.
/// </param>
/// <returns>
/// A sequence of <see cref="FragmentToken"/> representing the XML.
/// </returns>
/// <exception cref="InvalidOperationException">
/// An unknown node type is encountered.
/// </exception>
public IEnumerable <FragmentToken> Tokenize(XmlReader reader)
{
var result = new List <FragmentToken>();
while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Comment:
result.Add(this.CreateCommentToken(reader));
break;
case XmlNodeType.Whitespace:
case XmlNodeType.SignificantWhitespace:
case XmlNodeType.Text:
case XmlNodeType.EndElement:
case XmlNodeType.ProcessingInstruction:
case XmlNodeType.XmlDeclaration:
result.Add(XmlTokenizer.CreateToken(reader));
break;
case XmlNodeType.Element:
result.AddRange(this.CreateElementTokens(reader));
break;
default:
throw new InvalidOperationException($"Unknown XmlNodeType '{reader.NodeType}'");
}
}
return(result);
}
/// <summary>
/// Creates a token that describe an attribute from a <see cref="XmlReader"/> is positioned on an attribute
/// node.
/// </summary>
/// <param name="reader">
/// The reader.
/// </param>
/// <returns>
/// The newly created <see cref="FragmentToken"/>.
/// </returns>
private static FragmentToken CreateAttributeToken(XmlReader reader)
{
IMarkupExtensionInfo markup;
if (XmlTokenizer.MarkupExtensionParser.TryParse(reader.Value, out markup))
{
return(new FragmentToken(FragmentType.Attribute, reader.Name, markup));
}
return(XmlTokenizer.CreateToken(reader));
}
