public static IEnumerable <HtmlControl> FindAll(this IChildrenCollectionProvider container, Predicate <HtmlObject> matchCriteria)
{
if (!container.HasChildren)
{
yield return(null);
}
var queue = new Queue <IChildrenCollectionProvider>();
queue.Enqueue(container);
while (queue.Count > 0)
{
var item = queue.Dequeue();
var itemControl = item as HtmlControl;
if (itemControl != null && matchCriteria.Invoke(itemControl))
{
yield return(itemControl);
}
foreach (var childrenCollection in item.GetChildrenCollections())
{
foreach (var child in childrenCollection.OfType <HtmlControl>())
{
if (matchCriteria.Invoke(child))
{
yield return(child);
}
if (child is IChildrenCollectionProvider)
{
queue.Enqueue((IChildrenCollectionProvider)child);
}
}
}
}
}
public static HtmlObject Find(this IChildrenCollectionProvider container, String id)
{
if (String.IsNullOrEmpty(id))
{
return(null);
}
return(container.Find((c) => id.Equals(c.Id, StringComparison.OrdinalIgnoreCase)));
}
public static HtmlObject Find(this IChildrenCollectionProvider container, Type type, String id)
{
Assert.NullArgument(type, "type");
if (String.IsNullOrEmpty(id))
{
return(null);
}
return(container.Find((c) => type.IsAssignableFrom(c.GetType()) &&
id.Equals(c.Id, StringComparison.OrdinalIgnoreCase)));
}
public static HtmlObject Find(this IChildrenCollectionProvider container, Type type)
{
Assert.NullArgument(type, "type");
return(container.Find((c) => type.IsAssignableFrom(c.GetType())));
}
public static TControl Find <TControl>(this IChildrenCollectionProvider container) where TControl : HtmlObject
{
return((TControl)container.Find(typeof(TControl)));
}
public static IEnumerable <TControl> FindAll <TControl>(this IChildrenCollectionProvider container) where TControl : HtmlObject
{
return(container.FindAll((control) => control is TControl).Cast <TControl>());
}
public static HtmlControl Find(this IChildrenCollectionProvider container, Predicate <HtmlObject> matchCriteria)
{
return(container.FindAll(matchCriteria).FirstOrDefault());
}
