/// <summary>
/// Sliding windows
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source">Source</param>
/// <param name="beforeCapacity">Before Capacity</param>
/// <param name="afterCapacity">After Capacity</param>
/// <returns>Sliding Window</returns>
public static IEnumerable <SlidingWindow <T> > SlidingWindow <T>(this IEnumerable <T> source,
int beforeCapacity,
int afterCapacity,
bool completedOnly,
EventHandler <SlidingWindowChangedEventArgs <T> > changed)
{
if (null == source)
{
throw new ArgumentNullException(nameof(source));
}
else if (beforeCapacity < 0)
{
throw new ArgumentOutOfRangeException(nameof(beforeCapacity));
}
else if (afterCapacity < 0)
{
throw new ArgumentOutOfRangeException(nameof(afterCapacity));
}
SlidingWindow <T> window = new SlidingWindow <T>(beforeCapacity, afterCapacity);
if (null != changed)
{
window.Changed += changed;
}
try {
foreach (T item in source)
{
window.Enqueue(item);
if (completedOnly && window.IsCompleted)
{
yield return(window);
}
}
while (window.Dequeue())
{
if (completedOnly && window.IsCompleted)
{
yield return(window);
}
}
}
finally {
if (null != changed)
{
window.Changed -= changed;
}
}
}
/// <summary>
/// Standard constructor
/// </summary>
public SlidingWindowChangedEventArgs(
SlidingWindow <T> window,
Optional <T> current,
Optional <T> currentPrevious,
Optional <T> itemAdded,
Optional <T> itemRemoved,
bool completed,
bool completedPrevious)
{
Window = window;
Current = current;
CurrentPrevious = currentPrevious;
ItemAdded = itemAdded;
ItemRemoved = itemRemoved;
Completed = completed;
CompletedPrevious = completedPrevious;
}