public static Action EnterTag(Request request, XmlNode templateNode, SubQuery query)
{
if (templateNode.NodeType != XmlNodeType.Element)
{
return(DoNothing);
throw new NotImplementedException("EnterTag: " + templateNode.NodeType);
}
bool needsUnwind = false;
UndoStackHolder thiz = (UndoStackHolder)query ?? request;
ISettingsDictionary dict = query;
if (dict == null && request != null)
{
dict = request.TargetSettings;
}
XmlAttributeCollection collection = templateNode.Attributes;
EnterContext(request, query);
if (collection == null || collection.Count <= 0)
{
return(() =>
{
ExitContext(request, query);
});
}
else
{
var used = new List <XmlAttribute>();
string defaultElement = "";
Action gmrerstore;
gmrerstore = request.WithAttributesForUnwind(templateNode, ref defaultElement, used);
int uc = used.Count;
UndoStack savedValues = null;
foreach (XmlAttribute node in collection)
{
if (used.Contains(node))
{
continue;
}
bool found;
string n = node.Name.ToLower();
switch (n)
{
case "state":
case "flag":
case "graph":
case "topic":
case "that":
break;
default:
{
lock (ReservedAttributes)
{
if (ReservedAttributes.Contains(n))
{
continue;
}
bool prev = NamedValuesFromSettings.UseLuceneForGet;
try
{
NamedValuesFromSettings.UseLuceneForGet = false;
if (!dict.containsSettingCalled(n))
{
ReservedAttributes.Add(n);
request.writeToLog("ReservedAttributes: {0}", n);
}
else
{
if (!PushableAttributes.Contains(n))
{
PushableAttributes.Add(n);
request.writeToLog("PushableAttributes: {0}", n);
}
}
}
finally
{
NamedValuesFromSettings.UseLuceneForGet = prev;
}
}
// now require temp vars to s ay with_id="tempId"
// to set the id="tempid" teporarily while evalig tags
if (!n.StartsWith("with_"))
{
continue;
}
else
{
n = n.Substring(5);
}
Unifiable v = ReduceStar <Unifiable>(node.Value, query, dict, out found);
UndoStack.FindUndoAll(thiz, true);
savedValues = savedValues ?? UndoStack.GetStackFor(thiz);
//savedValues = savedValues ?? query.GetFreshUndoStack();
savedValues.pushValues(dict, n, v);
needsUnwind = true;
}
break;
}
}
// unwind
return(() =>
{
if (needsUnwind)
{
try
{
EnterContext(request, query);
if (savedValues != null)
{
savedValues.UndoAll();
}
}
catch (Exception ex)
{
request.writeToLog("ERROR " + ex);
}
finally
{
ExitContext(request, query);
}
}
ExitContext(request, query);
if (uc > 0)
{
gmrerstore();
}
});
}
}
public void UndoAll()
{
UndoStack.FindUndoAll(this, true);
}