/// <summary></summary>
/// <typeparam name="TKEY"></typeparam>
/// <typeparam name="T"></typeparam>
/// <param name="resourceDictionary"></param>
/// <param name="predicate"></param>
/// <returns></returns>
public static IEnumerable <T> FindResourceByKeyCore <TKEY, T>(ResourceDictionary resourceDictionary, Predicate <TKEY> predicate = null)
where TKEY : ResourceKey
{
var dictionaryStack = new Stack <FindResourceStackItem>();
var current = new FindResourceStackItem(resourceDictionary);
var returnedKeys = new List <TKEY>();
while (current != null)
{
// enumerate merged resources
while (current.TryGetNextDictionary(out var stackItem))
{
dictionaryStack.Push(current);
current = stackItem;
}
// enumerate resource keys
foreach (var key in current.Resources.Keys.OfType <TKEY>())
{
if (!returnedKeys.Contains(key) && (predicate == null || predicate(key)) && current.Resources[key] is T v)
{
returnedKeys.Add(key);
yield return(v);
}
}
current = dictionaryStack.Count > 0 ? dictionaryStack.Pop() : null;
}
} // func FindResourceByKeyCore
} // ctor
public bool TryGetNextDictionary(out FindResourceStackItem stackItem)
{
if (mergedIndex >= 0)
{
stackItem = new FindResourceStackItem(Resources.MergedDictionaries[mergedIndex--]);
return(true);
}
else
{
stackItem = null;
return(false);
}
} // func TryGetNextDictionary
