protected override void FreeAfterUse()
{
base.FreeAfterUse();
Entry.Invalidated -= onEntryInvalidated;
// Return points to the pool.
ClearInternal(false);
Entry = null;
}
private void addEntry(OsuHitObject hitObject)
{
var newEntry = new FollowPointLifetimeEntry(hitObject);
var index = lifetimeEntries.AddInPlace(newEntry, Comparer <FollowPointLifetimeEntry> .Create((e1, e2) =>
{
int comp = e1.Start.StartTime.CompareTo(e2.Start.StartTime);
if (comp != 0)
{
return(comp);
}
// we always want to insert the new item after equal ones.
// this is important for beatmaps with multiple hitobjects at the same point in time.
// if we use standard comparison insert order, there will be a churn of connections getting re-updated to
// the next object at the point-in-time, adding a construction/disposal overhead (see FollowPointConnection.End implementation's ClearInternal).
// this is easily visible on https://osu.ppy.sh/beatmapsets/150945#osu/372245
return(-1);
}));
if (index < lifetimeEntries.Count - 1)
{
// Update the connection's end point to the next connection's start point
// h1 -> -> -> h2
// connection nextGroup
FollowPointLifetimeEntry nextEntry = lifetimeEntries[index + 1];
newEntry.End = nextEntry.Start;
}
else
{
// The end point may be non-null during re-ordering
newEntry.End = null;
}
if (index > 0)
{
// Update the previous connection's end point to the current connection's start point
// h1 -> -> -> h2
// prevGroup connection
FollowPointLifetimeEntry previousEntry = lifetimeEntries[index - 1];
previousEntry.End = newEntry.Start;
}
lifetimeManager.AddEntry(newEntry);
}
private void removeEntry(OsuHitObject hitObject)
{
int index = lifetimeEntries.FindIndex(e => e.Start == hitObject);
var entry = lifetimeEntries[index];
entry.UnbindEvents();
lifetimeEntries.RemoveAt(index);
lifetimeManager.RemoveEntry(entry);
if (index > 0)
{
// Update the previous connection's end point to the next connection's start point
// h1 -> -> -> h2 -> -> -> h3
// prevGroup connection nextGroup
// The current connection's end point is used since there may not be a next connection
FollowPointLifetimeEntry previousEntry = lifetimeEntries[index - 1];
previousEntry.End = entry.End;
}
}