public static IEnumerable <Component> GetComponentsInOnlyChildren(this Transform target, Type type,
SearchStrategy strategy =
SearchStrategy.FindComponent)
{
var queue = new Queue <Transform>();
AddChildren(target);
while (queue.Any())
{
var transform = queue.Dequeue();
var components = strategy.FindComponents(transform.gameObject, type);
foreach (var component in components)
{
yield return(component);
}
AddChildren(transform);
}
void AddChildren(Transform transform)
{
for (var index = 0; index < transform.childCount; index++)
{
var child = transform.GetChild(index);
queue.Enqueue(child);
}
}
}
private static void ResolveCollection(Component behaviour, object obj, FieldInfo field, SearchStrategy strategy)
{
if (field.FieldType.IsGenericType == false)
{
var message = $"{typeof(FindComponentAttribute)} found on non-generic collection field: {field}. " +
"This is not currently supported.";
Debug.LogWarning(message);
return;
}
var itemTypes = field.FieldType.GetGenericArguments();
if (itemTypes.Length > 1)
{
var message = $"{typeof(FindComponentAttribute)} found on collection field with multiple type arguments: {field} " +
"This is not currently supported.";
Debug.LogWarning(message);
return;
}
var itemType = itemTypes.First();
var fieldValue = field.GetValue(obj);
if (fieldValue == null)
{
return;
}
var list = (IList)fieldValue;
var items = strategy.FindComponents(behaviour.gameObject, itemType);
var newItems = items.Except(list.Contains);
foreach (var item in newItems.ToArray())
{
list.Add(item);
}
}