private static void Remove([NotNull] ICollectionChangedEventSource <TEventItem, TCollectionItem> sender, [NotNull] NotifyCollectionChangedEventArgs e)
{
// ReSharper disable once PossibleNullReferenceException => e.OldItems != null <= NotifyCollectionChangedEventArgs.Constructors. for NotifyCollectionChangedAction.Remove
var itemsToRemove = e.OldItems.Count;
while (itemsToRemove-- > 0)
{
sender.RemoveItem(e.OldStartingIndex);
}
}
private static void Add([NotNull] ICollectionChangedEventSource <TEventItem, TCollectionItem> sender, [NotNull] NotifyCollectionChangedEventArgs e)
{
var insertPosition = e.NewStartingIndex;
// ReSharper disable once PossibleNullReferenceException => e.NewItems != null <= NotifyCollectionChangedEventArgs.Constructors. for NotifyCollectionChangedAction.Add
foreach (TEventItem model in e.NewItems)
{
sender.InsertItem(insertPosition++, sender.CreateItem(model));
}
}
private static void Reset([NotNull] ICollectionChangedEventSource <TEventItem, TCollectionItem> sender, NotifyCollectionChangedEventArgs e)
{
sender.ClearCollection();
if (sender.CollectionItemSource == null)
{
return;
}
foreach (var model in sender.CollectionItemSource)
{
sender.AddItem(sender.CreateItem(model));
}
}
/// <summary>
/// Handle INotifyCollectionChanged events.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="e">The arguments of the event.</param>
/// <exception cref="ArgumentNullException">The sender or the event argument is null.</exception>
/// <exception cref="ArgumentOutOfRangeException">The event argument Action and other data properties are not in match.
/// This generally does not occur if the collection change event argument is acquired from the system call. See exception
/// message for the cases where the cause is the client API. These cases are also documented in the test code.</exception>
public static void Handle(ICollectionChangedEventSource <TEventItem, TCollectionItem> sender, NotifyCollectionChangedEventArgs e)
{
if (sender == null)
{
throw new ArgumentNullException(nameof(sender));
}
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
var handler = EventHandlers[e.Action];
// ReSharper disable once PossibleNullReferenceException => We don't add any null actions to the EventHandlers collection.
handler(sender, e);
}
private static void Replace([NotNull] ICollectionChangedEventSource <TEventItem, TCollectionItem> sender, [NotNull] NotifyCollectionChangedEventArgs e)
{
// ReSharper disable once PossibleNullReferenceException => e.NewItems != null <= NotifyCollectionChangedEventArgs.Constructors. for NotifyCollectionChangedAction.Replace
sender.ReplaceItem(e.NewStartingIndex, sender.CreateItem((TEventItem)e.NewItems[0]));
}
private static void Move([NotNull] ICollectionChangedEventSource <TEventItem, TCollectionItem> sender, [NotNull] NotifyCollectionChangedEventArgs e)
{
sender.MoveItem(e.OldStartingIndex, e.NewStartingIndex);
}
