protected bool ModifyIf(Func <bool> action, Func <ListEventArgs> fargs)
{
if (!this.ContainsListeners)
{
return(action());
}
ListEventArgs args = fargs();
if (!action())
{
return(false);
}
if (!args.IsEmpty)
{
this.OnListChanged(args);
}
return(true);
}
public sealed override void Clear()
{
this.Modify(
() => this.ClearImpl(),
() => ListEventArgs.NewEventClear(this));
}
public sealed override void RemoveAt(int index)
{
this.Modify(
() => this.RemoveAtImpl(index),
() => ListEventArgs.NewEventRemoveRange(new[] { index }, new[] { this[index] }));
}
public sealed override void Insert(int index, T item)
{
this.Modify(
() => this.InsertImpl(index, item),
() => ListEventArgs.NewEventAddRange(new[] { index }, new[] { item }));
}
public sealed override void RemoveAll(IEnumerable <T> enumer)
{
this.Modify(
() => this.RemoveAllImpl(enumer),
() => ListEventArgs.NewEventRemoveRange(enumer.Select(this.IndexOf), enumer));
}
public sealed override void AddAll(IEnumerable <T> enumer)
{
this.Modify(
() => this.InsertAllImpl(this.Count, enumer),
() => ListEventArgs.NewEventAddRange(this.Count, enumer));
}
public sealed override void RemoveAll(int index, int count)
{
this.Modify(
() => this.RemoveAllImpl(index, count),
() => ListEventArgs.NewEventRemoveRange(index, Enumerable.Range(index, count).Select(i => this[i])));
}
public sealed override void InsertAll(int index, IEnumerable <T> enumer)
{
this.Modify(
() => this.InsertAllImpl(index, enumer),
() => ListEventArgs.NewEventAddRange(index, enumer));
}