/// <summary>
/// Returns the <see cref="EvaluationContext"/> from any parent 'model' element.
/// </summary>
/// <returns></returns>
internal EvaluationContext GetAncestorModelEvaluationContext()
{
return(obj.Ancestors(Constants.XForms_1_0 + "model")
.SelectMany(i => i.Interfaces <Model>())
.Select(i => i.DefaultEvaluationContext)
.FirstOrDefault(i => i != null));
}
/// <summary>
///
/// Obtains the ancestors of the given <see cref="XObject"/>, including the specified instance.
/// </summary>
/// <param name="self"></param>
/// <returns></returns>
public static IEnumerable <XObject> AncestorsAndSelf(this XObject self)
{
Contract.Requires <ArgumentNullException>(self != null);
return(self.Ancestors().Prepend(self));
}