internal static object GetMemberValue(this XamlObject xobj, XamlMember xm)
{
if (xm.IsUnknown)
{
return(null);
}
if (xm.IsAttachable)
{
return(xobj.GetRawValue()); // attachable property value
}
// FIXME: this looks like an ugly hack. Is this really true? What if there's MarkupExtension that uses another MarkupExtension type as a member type.
var obj = xobj.Context.GetRawValue();
if (xm == XamlLanguage.Initialization)
{
return(obj);
}
if (xm == XamlLanguage.Items) // collection itself.
{
return(obj);
}
if (xm == XamlLanguage.Arguments) // object itself
{
return(obj);
}
if (xm == XamlLanguage.PositionalParameters)
{
return(xobj.GetRawValue()); // dummy value
}
TypeConverter tc = null;
var cas = xm.GetCustomAttributeProvider().GetCustomAttributes(true);
foreach (var ca in cas)
{
tc = TypeDescriptor.GetConverter(ca);
if (tc != null)
{
break;
}
}
if (tc != null)
{
return(xm.UnderlyingGetter.Invoke(xobj.GetRawValue(), new object[] {}));
}
return(xm.Invoker.GetValue(xobj.GetRawValue()));
}
public static string ConstructorArgumentName(this XamlMember xm)
{
var caa = xm.GetCustomAttributeProvider().GetCustomAttribute <ConstructorArgumentAttribute>(false);
return(caa.ArgumentName);
}
internal static bool IsConstructorArgument(this XamlMember xm)
{
var ap = xm.GetCustomAttributeProvider();
return(ap != null && ap.GetCustomAttributes(typeof(ConstructorArgumentAttribute), false).Length > 0);
}