private static bool WriteStartTag(XmlWriter writer, XmlNamespaceManager manager, Element element, out string ns)
{
ns = null;
// Custom elements take priority over component
if (element is ICustomElement customElement)
{
customElement.CreateStartElement(writer);
if (!customElement.ProcessChildren)
{
return(false); // Don't need to do any more work.
}
}
else
{
XmlComponent component = KmlFactory.FindType(element.GetType());
if (component == null)
{
// We can't handle it so ignore it
System.Diagnostics.Debug.WriteLine("Unknown Element type - please register first." + element.GetType());
return(false);
}
ns = component.NamespaceUri;
string prefix = FindPrefix(manager, ns);
writer.WriteStartElement(prefix, component.Name, component.NamespaceUri);
}
return(true);
}
private static void SerializeElement(XmlWriter writer, Element element)
{
// Write start tag
XmlComponent component = KmlFactory.FindType(element.GetType());
// Custom elements take priority over component
ICustomElement customElement = element as ICustomElement;
if (customElement != null)
{
customElement.CreateStartElement(writer);
if (!customElement.ProcessChildren)
{
return; // Don't need to to any more work.
}
}
else if (component != null)
{
writer.WriteStartElement(component.Name, component.NamespaceUri);
}
else
{
// We can't handle it so ignore it
System.Diagnostics.Debug.WriteLine("Unknown Element type - please register first." + element.GetType());
return; // Skip
}
// Write the attributes - unknown, serialized then namespaces.
foreach (var att in element.Attributes)
{
writer.WriteAttributeString(att.Prefix, att.Name, att.NamespaceUri, att.Value);
}
WriteAttributes(writer, element);
foreach (var ns in element.Namespaces.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml))
{
writer.WriteAttributeString("xmlns", ns.Key, string.Empty, ns.Value);
}
// Now the text part
WriteData(writer, element.InnerText);
// Now write the elements - serialized, children then unknown children.
WriteElements(writer, element);
SerializeElements(writer, element.OrderedChildren);
SerializeElements(writer, element.Orphans);
// Finished...
writer.WriteEndElement();
}
private void SerializeExtensions(Element element, Type elementType)
{
foreach (Type type in KmlFactory.GetKnownExtensionTypes(elementType))
{
foreach (Element orphan in element.Orphans)
{
// Make sure we don't serialize the same element twice
// by adding it to the set
if ((orphan.GetType() == type) && this.serializedElements.Add(orphan))
{
this.serializer.SerializeElement(this.writer, this.manager, orphan);
}
}
}
}
private Element CreateElement()
{
if (this.reader.Depth > MaxNestingDepth)
{
throw new InvalidOperationException("Maximum nesting depth has been reached.");
}
if (this.reader.NodeType != XmlNodeType.Element)
{
return(null);
}
// Need to check this here before we move to the attributes,
// as reader.NodeType will never be EndElement for empty elements
// and when we move to an attribute, IsEmptyElement doesn't work
this.currentElementIsEmpty = this.reader.IsEmptyElement;
Element element = KmlFactory.CreateElement(this.GetXmlComponent());
return(element ?? new UnknownElement(new XmlComponent(this.reader)));
}
private Element GetElement()
{
if (_reader.Depth > MaxNestingDepth)
{
throw new InvalidOperationException("Maximum nesting depth has been reached.");
}
if (_reader.NodeType != XmlNodeType.Element)
{
return(null);
}
// Need to check this here before we move to the attributes,
// as reader.NodeType will never be EndElement for empty elements
// and when we move to an attribute, IsEmptyElement doesn't work
bool isEmpty = _reader.IsEmptyElement;
Element parent = KmlFactory.CreateElement(this.GetXmlComponent());
if (parent == null)
{
parent = new UnknownElement(new XmlComponent(_reader));
}
else if (parent is IHtmlContent)
{
this.ProcessAttributes(parent);
// No need to process all the children
string text = string.Empty;
if (!isEmpty) // Is there something to parse?
{
text = XmlExtractor.FlattenXml(_reader);
}
((IHtmlContent)parent).Text = text;
return(parent);
}
this.ProcessAttributes(parent); // Empties can have attributes though
if (!isEmpty) // Is there any text/children to process?
{
while (_reader.Read())
{
if (_reader.NodeType == XmlNodeType.EndElement)
{
break;
}
switch (_reader.NodeType)
{
case XmlNodeType.Element:
this.AddChild(parent);
break;
case XmlNodeType.CDATA: // Treat like normal text
case XmlNodeType.Text:
parent.AddInnerText(_reader.Value);
break;
}
}
}
return(parent);
}
