/// <summary>
/// Dealing with C unions, we need a two-step marshalling to get an actual instance.
/// </summary>
/// <param name="nodePointer"></param>
/// <returns></returns>
private static GumboNode MarshalToSpecificNode(IntPtr nodePointer)
{
GumboNode node = Marshal.PtrToStructure <GumboNode>(nodePointer);
switch (node.type)
{
case GumboNodeType.GUMBO_NODE_DOCUMENT:
return(Marshal.PtrToStructure <GumboDocumentNode>(nodePointer));
case GumboNodeType.GUMBO_NODE_ELEMENT:
case GumboNodeType.GUMBO_NODE_TEMPLATE:
return(Marshal.PtrToStructure <GumboElementNode>(nodePointer));
case GumboNodeType.GUMBO_NODE_TEXT:
case GumboNodeType.GUMBO_NODE_CDATA:
case GumboNodeType.GUMBO_NODE_COMMENT:
case GumboNodeType.GUMBO_NODE_WHITESPACE:
return(Marshal.PtrToStructure <GumboTextNode>(nodePointer));
default:
throw new NotImplementedException($"Node type '{node.type}' is not implemented");
}
}
static XNode CreateXNode(GumboNode node)
{
switch (node.type)
{
case GumboNodeType.GUMBO_NODE_DOCUMENT: return(new XDocument(((GumboDocumentNode)node).GetChildren().Select(CreateXNode)));
case GumboNodeType.GUMBO_NODE_ELEMENT:
case GumboNodeType.GUMBO_NODE_TEMPLATE:
var elementNode = (GumboElementNode)node;
var elementName = GetName(elementNode.element.tag);
var attributes = elementNode.GetAttributes().Select(x => new XAttribute(NativeUtf8.StringFromNativeUtf8(x.name), NativeUtf8.StringFromNativeUtf8(x.value)));
return(new XElement(elementName, attributes, elementNode.GetChildren().Select(CreateXNode)));
case GumboNodeType.GUMBO_NODE_TEXT: return(new XText(NativeUtf8.StringFromNativeUtf8(((GumboTextNode)node).text.text)));
case GumboNodeType.GUMBO_NODE_CDATA: return(new XCData(NativeUtf8.StringFromNativeUtf8(((GumboTextNode)node).text.text)));
case GumboNodeType.GUMBO_NODE_COMMENT: return(new XComment(NativeUtf8.StringFromNativeUtf8(((GumboTextNode)node).text.text)));
case GumboNodeType.GUMBO_NODE_WHITESPACE: return(new XText(NativeUtf8.StringFromNativeUtf8(((GumboTextNode)node).text.text)));
default: throw new NotImplementedException($"Node type '{node.type}' is not implemented");
}
}
public Node(GumboNode node, Node parent)
{
Type = node.type;
ParseFlags = node.parse_flags;
Parent = parent;
}