private static IEnumerable <HtmlNode> ExecuteSelectorRecursively(IEnumerable <ManagedQueryPart> queryParts, HtmlNodeCollection items)
{
// abort condition
if (items.NullOrNone() || queryParts.NullOrNone())
{
yield break;
}
foreach (var shallowItem in items)
{
if (FindMatch(shallowItem, queryParts.First()))
{
if (queryParts.Count() == 1)
{
yield return(shallowItem);
}
else
{
foreach (var deepItem in ExecuteSelectorRecursively(queryParts.Skip(1), shallowItem.ChildNodes))
{
yield return(deepItem);
}
}
}
foreach (var deepItem in ExecuteSelectorRecursively(queryParts, shallowItem.ChildNodes))
{
yield return(deepItem);
}
}
}