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- using System;
- #if UniRxLibrary
- using UnityObservable = UniRx.ObservableUnity;
- #else
- using UnityObservable = UniRx.Observable;
- #endif
- namespace UniRx.Operators
- {
- internal class ThrottleFrameObservable<T> : OperatorObservableBase<T>
- {
- readonly IObservable<T> source;
- readonly int frameCount;
- readonly FrameCountType frameCountType;
- public ThrottleFrameObservable(IObservable<T> source, int frameCount, FrameCountType frameCountType) : base(source.IsRequiredSubscribeOnCurrentThread())
- {
- this.source = source;
- this.frameCount = frameCount;
- this.frameCountType = frameCountType;
- }
- protected override IDisposable SubscribeCore(IObserver<T> observer, IDisposable cancel)
- {
- return new ThrottleFrame(this, observer, cancel).Run();
- }
- class ThrottleFrame : OperatorObserverBase<T, T>
- {
- readonly ThrottleFrameObservable<T> parent;
- readonly object gate = new object();
- T latestValue = default(T);
- bool hasValue = false;
- SerialDisposable cancelable;
- ulong id = 0;
- public ThrottleFrame(ThrottleFrameObservable<T> parent, IObserver<T> observer, IDisposable cancel) : base(observer, cancel)
- {
- this.parent = parent;
- }
- public IDisposable Run()
- {
- cancelable = new SerialDisposable();
- var subscription = parent.source.Subscribe(this);
- return StableCompositeDisposable.Create(cancelable, subscription);
- }
- public override void OnNext(T value)
- {
- ulong currentid;
- lock (gate)
- {
- hasValue = true;
- latestValue = value;
- id = unchecked(id + 1);
- currentid = id;
- }
- var d = new SingleAssignmentDisposable();
- cancelable.Disposable = d;
- d.Disposable = UnityObservable.TimerFrame(parent.frameCount, parent.frameCountType)
- .Subscribe(new ThrottleFrameTick(this, currentid));
- }
- public override void OnError(Exception error)
- {
- cancelable.Dispose();
- lock (gate)
- {
- hasValue = false;
- id = unchecked(id + 1);
- try { observer.OnError(error); } finally { Dispose(); }
- }
- }
- public override void OnCompleted()
- {
- cancelable.Dispose();
- lock (gate)
- {
- if (hasValue)
- {
- observer.OnNext(latestValue);
- }
- hasValue = false;
- id = unchecked(id + 1);
- try { observer.OnCompleted(); } finally { Dispose(); }
- }
- }
- class ThrottleFrameTick : IObserver<long>
- {
- readonly ThrottleFrame parent;
- readonly ulong currentid;
- public ThrottleFrameTick(ThrottleFrame parent, ulong currentid)
- {
- this.parent = parent;
- this.currentid = currentid;
- }
- public void OnCompleted()
- {
- }
- public void OnError(Exception error)
- {
- }
- public void OnNext(long _)
- {
- lock (parent.gate)
- {
- if (parent.hasValue && parent.id == currentid)
- {
- parent.observer.OnNext(parent.latestValue);
- }
- parent.hasValue = false;
- }
- }
- }
- }
- }
- }
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