public QilNode GetCurrent()
{
CheckFocus();
switch (_focusType)
{
case SingletonFocusType.InitialDocumentNode: return(_f.Root(_f.XmlContext()));
case SingletonFocusType.InitialContextNode: return(_f.XmlContext());
default:
Debug.Assert(_focusType == SingletonFocusType.Iterator && _current != null, "Unexpected singleton focus type");
return(_current);
}
}
// Filers that travers Content being converted to global travers:
// Filter($j= ... Filter($i = Content(fixup), ...)) -> Filter($j= ... Filter($i = Loop($j = DesendentOrSelf(Root(fixup)), Content($j), ...)))
protected override QilNode VisitLoop(QilLoop n)
{
if (n.Variable.Binding.NodeType == QilNodeType.Root || n.Variable.Binding.NodeType == QilNodeType.Deref)
{
// This is absolute path already. We shouldn't touch it
return(n);
}
if (n.Variable.Binding.NodeType == QilNodeType.Content)
{
// This is "begin" of reletive path. Let's rewrite it as absolute:
QilUnary content = (QilUnary)n.Variable.Binding;
Debug.Assert(content.Child == this.fixup, "Unexpected content node");
QilIterator it = f.For(f.DescendantOrSelf(f.Root(this.fixup)));
content.Child = it;
n.Variable.Binding = f.Loop(it, content);
return(n);
}
n.Variable.Binding = Visit(n.Variable.Binding);
return(n);
}
