private void PreprocessDiffgram(XmlDocument diffgramDoc)
{
// read xmldiff options
XmlAttribute attr = (XmlAttribute)diffgramDoc.DocumentElement.Attributes.GetNamedItem("options");
if (attr == null)
{
throw new Exception("Missing 'options' attribute in the diffgram.");
}
string optionsAttr = attr.Value;
var options = XmlDiff.ParseOptions(optionsAttr);
_bIgnoreChildOrder = (((int)options & (int)(XmlDiffOptions.IgnoreChildOrder)) > 0);
_bIgnoreComments = (((int)options & (int)(XmlDiffOptions.IgnoreComments)) > 0);
_bIgnorePI = (((int)options & (int)(XmlDiffOptions.IgnorePI)) > 0);
_bIgnoreWhitespace = (((int)options & (int)(XmlDiffOptions.IgnoreWhitespace)) > 0);
_bIgnoreNamespaces = (((int)options & (int)(XmlDiffOptions.IgnoreNamespaces)) > 0);
_bIgnorePrefixes = (((int)options & (int)(XmlDiffOptions.IgnorePrefixes)) > 0);
_bIgnoreDtd = (((int)options & (int)(XmlDiffOptions.IgnoreDtd)) > 0);
if (_bIgnoreNamespaces)
{
_bIgnorePrefixes = true;
}
// read descriptors
XmlNodeList children = diffgramDoc.DocumentElement.ChildNodes;
IEnumerator e = children.GetEnumerator();
while (e.MoveNext())
{
XmlElement desc = e.Current as XmlElement;
if (desc != null && desc.LocalName == "descriptor")
{
int opid = int.Parse(desc.GetAttribute("opid"));
OperationDescriptor.Type type;
switch (desc.GetAttribute("type"))
{
case "move": type = OperationDescriptor.Type.Move; break;
case "prefix change": type = OperationDescriptor.Type.PrefixChange; break;
case "namespace change": type = OperationDescriptor.Type.NamespaceChange; break;
default:
throw new Exception("Invalid descriptor type.");
}
OperationDescriptor od = new OperationDescriptor(opid, type);
_descriptors[opid] = od;
}
}
}
