// returns true if ns decls was added to scope
public bool EnterScope(NsDecl nsDecl)
{
_lastScopes++;
bool hasNamespaces = false;
bool excludeAll = false;
for (; nsDecl != null; nsDecl = nsDecl.Prev)
{
if (nsDecl.NsUri == null)
{
Debug.Assert(nsDecl.Prefix == null, "NS may be null only when prefix is null where it is used for extension-element-prefixes='#all'");
excludeAll = true;
}
else if (nsDecl.Prefix == null)
{
AddExNamespace(nsDecl.NsUri);
}
else
{
hasNamespaces = true;
AddNsDeclaration(nsDecl.Prefix, nsDecl.NsUri);
}
}
if (excludeAll)
{
// #all should be on the top of the stack, becase all NSs on this element should be excluded as well
AddExNamespace(null);
}
return(hasNamespaces);
}
public readonly string NsUri; // null means "#all" -- all namespace defined above this one are excluded.
public NsDecl(NsDecl prev, string prefix, string nsUri)
{
Debug.Assert(nsUri != null || Prefix == null);
this.Prev = prev;
this.Prefix = prefix;
this.NsUri = nsUri;
}
public void AddNamespace(XsltInput input)
{
if (Ref.Equal(input.LocalName, input.Atoms.Xml))
{
Debug.Assert(input.Value == XmlReservedNs.NsXml, "XmlReader must check binding for 'xml' prefix");
}
else
{
nsList = new NsDecl(nsList, input.LocalName, input.Value);
}
}