UniRx 에셋 추가

Gameton-06/Assets/Plugins/UniRx/Scripts/Operators/Skip.cs

@@ -0,0 +1,138 @@
+using System;
+using UniRx.Operators;
+
+namespace UniRx.Operators
+{
+    internal class SkipObservable<T> : OperatorObservableBase<T>
+    {
+        readonly IObservable<T> source;
+        readonly int count;
+        readonly TimeSpan duration;
+        internal readonly IScheduler scheduler; // public for optimization check
+
+        public SkipObservable(IObservable<T> source, int count)
+            : base(source.IsRequiredSubscribeOnCurrentThread())
+        {
+            this.source = source;
+            this.count = count;
+        }
+
+        public SkipObservable(IObservable<T> source, TimeSpan duration, IScheduler scheduler)
+            : base(scheduler == Scheduler.CurrentThread || source.IsRequiredSubscribeOnCurrentThread())
+        {
+            this.source = source;
+            this.duration = duration;
+            this.scheduler = scheduler;
+        }
+
+        // optimize combiner
+
+        public IObservable<T> Combine(int count)
+        {
+            // use sum
+            // xs = 6
+            // xs.Skip(2) = 4
+            // xs.Skip(2).Skip(3) = 1
+
+            return new SkipObservable<T>(source, this.count + count);
+        }
+
+        public IObservable<T> Combine(TimeSpan duration)
+        {
+            // use max
+            // xs = 6s
+            // xs.Skip(2s) = 2s
+            // xs.Skip(2s).Skip(3s) = 3s
+
+            return (duration <= this.duration)
+                ? this
+                : new SkipObservable<T>(source, duration, scheduler);
+        }
+
+        protected override IDisposable SubscribeCore(IObserver<T> observer, IDisposable cancel)
+        {
+            if (scheduler == null)
+            {
+                return source.Subscribe(new Skip(this, observer, cancel));
+            }
+            else
+            {
+                return new Skip_(this, observer, cancel).Run();
+            }
+        }
+
+        class Skip : OperatorObserverBase<T, T>
+        {
+            int remaining;
+
+            public Skip(SkipObservable<T> parent, IObserver<T> observer, IDisposable cancel) : base(observer, cancel)
+            {
+                this.remaining = parent.count;
+            }
+
+            public override void OnNext(T value)
+            {
+                if (remaining <= 0)
+                {
+                    base.observer.OnNext(value);
+                }
+                else
+                {
+                    remaining--;
+                }
+            }
+
+            public override void OnError(Exception error)
+            {
+                try { observer.OnError(error); } finally { Dispose(); }
+            }
+
+            public override void OnCompleted()
+            {
+                try { observer.OnCompleted(); } finally { Dispose(); }
+            }
+        }
+
+        class Skip_ : OperatorObserverBase<T, T>
+        {
+            readonly SkipObservable<T> parent;
+            volatile bool open;
+
+            public Skip_(SkipObservable<T> parent, IObserver<T> observer, IDisposable cancel) : base(observer, cancel)
+            {
+                this.parent = parent;
+            }
+
+            public IDisposable Run()
+            {
+                var d1 = parent.scheduler.Schedule(parent.duration, Tick);
+                var d2 = parent.source.Subscribe(this);
+
+                return StableCompositeDisposable.Create(d1, d2);
+            }
+
+            void Tick()
+            {
+                open = true;
+            }
+
+            public override void OnNext(T value)
+            {
+                if (open)
+                {
+                    base.observer.OnNext(value);
+                }
+            }
+
+            public override void OnError(Exception error)
+            {
+                try { observer.OnError(error); } finally { Dispose(); };
+            }
+
+            public override void OnCompleted()
+            {
+                try { observer.OnCompleted(); } finally { Dispose(); };
+            }
+        }
+    }
+}