public static string GetPrefixOfNamespace(this XAttribute attribute, XNamespace ns)
{
string namespaceName = ns.NamespaceName;
if (namespaceName.Length == 0)
{
return(string.Empty);
}
if (attribute.GetParent() != null)
{
return(((XElement)attribute.GetParent()).GetPrefixOfNamespace(ns));
}
if ((object)namespaceName == (object)XNodeNavigator.xmlPrefixNamespace)
{
return("xml");
}
if ((object)namespaceName == (object)XNodeNavigator.xmlnsPrefixNamespace)
{
return("xmlns");
}
return(null);
}
private static bool HasNamespaceDeclarationInScope(XAttribute a, XElement e)
{
XName name = a.Name;
while (e != null && e != a.GetParent())
{
if (e.Attribute(name) != null)
{
return(true);
}
e = e.Parent;
}
return(false);
}
public override bool MoveToNextNamespace(XPathNamespaceScope scope)
{
XAttribute a = _source as XAttribute;
if (a != null && _parent != null && !IsXmlNamespaceDeclaration(a))
{
switch (scope)
{
case XPathNamespaceScope.Local:
if (a.GetParent() != _parent)
{
return(false);
}
a = GetNextNamespaceDeclarationLocal(a);
break;
case XPathNamespaceScope.ExcludeXml:
do
{
a = GetNextNamespaceDeclarationGlobal(a);
} while (a != null &&
(a.Name.LocalName == "xml" ||
HasNamespaceDeclarationInScope(a, _parent)));
break;
case XPathNamespaceScope.All:
do
{
a = GetNextNamespaceDeclarationGlobal(a);
} while (a != null &&
HasNamespaceDeclarationInScope(a, _parent));
if (a == null &&
!HasNamespaceDeclarationInScope(GetXmlNamespaceDeclaration(), _parent))
{
a = GetXmlNamespaceDeclaration();
}
break;
}
if (a != null)
{
_source = a;
return(true);
}
}
return(false);
}
static XAttribute GetNextNamespaceDeclarationLocal(XAttribute a)
{
XElement e = (XElement)a.GetParent();
if (e == null)
{
return(null);
}
while (a != e.LastAttribute)
{
a = a.NextAttribute;
if (a.IsNamespaceDeclaration)
{
return(a);
}
}
return(null);
}
private static XAttribute?GetNextNamespaceDeclarationGlobal(XAttribute a)
{
XElement?e = (XElement?)a.GetParent();
if (e == null)
{
return(null);
}
XAttribute?next = GetNextNamespaceDeclarationLocal(a);
if (next != null)
{
return(next);
}
e = e.Parent;
if (e == null)
{
return(null);
}
return(GetFirstNamespaceDeclarationGlobal(e));
}
public override bool MoveToNextAttribute()
{
XAttribute currentAttribute = _source as XAttribute;
if (currentAttribute != null && _parent == null)
{
XElement e = (XElement)currentAttribute.GetParent();
if (e != null)
{
for (XAttribute attribute = currentAttribute.NextAttribute; attribute != null; attribute = attribute.NextAttribute)
{
if (!attribute.IsNamespaceDeclaration)
{
_source = attribute;
return(true);
}
}
}
}
return(false);
}
public override bool MoveToNextAttribute()
{
XAttribute a = source as XAttribute;
if (a != null && parent == null)
{
XElement e = (XElement)a.GetParent();
if (e != null)
{
while (a != e.LastAttribute)
{
a = a.NextAttribute;
if (!a.IsNamespaceDeclaration)
{
source = a;
return(true);
}
}
}
}
return(false);
}
