public XPathNavigator CreateNavigator (int node_quota, XmlSpace space)
{
if (nav_cache == null) {
DTMXPathDocumentWriter2 pw = new DTMXPathDocumentWriter2 (new NameTable (), node_quota);
XmlDictionaryWriter w = XmlDictionaryWriter.CreateDictionaryWriter (pw);
CreateMessage ().WriteMessage (w);
nav_cache = pw.CreateDocument ().CreateNavigator ();
}
return nav_cache.Clone ();
}
public object Evaluate (XslTransformProcessor p)
{
if (select != null) {
object o = p.Evaluate (select);
// To resolve variable references correctly, we
// have to collect all the target nodes here.
// (otherwise, variables might be resolved with
// different level of variable stack in
// XslTransformProcessor).
if (o is XPathNodeIterator) {
ArrayList al = new ArrayList ();
XPathNodeIterator iter = (XPathNodeIterator) o;
while (iter.MoveNext ())
al.Add (iter.Current.Clone ());
o = new ListIterator (al, p.XPathContext);
}
return o;
} else if (content != null) {
DTMXPathDocumentWriter2 w = new DTMXPathDocumentWriter2 (p.Root.NameTable, 200);
Outputter outputter = new GenericOutputter(w, p.Outputs, null, true);
p.PushOutput (outputter);
if (p.CurrentNodeset.CurrentPosition == 0)
p.NodesetMoveNext ();
content.Evaluate (p);
p.PopOutput ();
return w.CreateDocument ().CreateNavigator ();
} else {
return "";
}
}
public override object Evaluate (BaseIterator iter)
{
XsltCompiledContext ctx = iter.NamespaceManager as XsltCompiledContext;
XPathNavigator loc = iter.Current != null ? iter.Current.Clone () : null;
object val = arg0.Evaluate (iter);
XPathNavigator nav = val as XPathNavigator;
if (nav == null && !strict) {
var iterResult = val as XPathNodeIterator;
if (iterResult != null)
return iterResult;
var strResult = val as string;
if (strResult == string.Empty) {
DTMXPathDocumentWriter2 w = new DTMXPathDocumentWriter2 (ctx.Processor.Root.NameTable, 10);
nav = w.CreateDocument ().CreateNavigator ();
}
}
if (nav == null) {
if (loc != null)
return new XsltException ("Cannot convert the XPath argument to a result tree fragment.", null, loc);
else
return new XsltException ("Cannot convert the XPath argument to a result tree fragment.", null);
}
ArrayList al = new ArrayList ();
al.Add (nav);
return new ListIterator (al, ctx);
}
