UniRx 에셋 추가

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

@@ -0,0 +1,165 @@
+using System;
+using System.Collections.Generic;
+
+namespace UniRx.Operators
+{
+    internal class DistinctUntilChangedObservable<T> : OperatorObservableBase<T>
+    {
+        readonly IObservable<T> source;
+        readonly IEqualityComparer<T> comparer;
+
+        public DistinctUntilChangedObservable(IObservable<T> source, IEqualityComparer<T> comparer)
+            : base(source.IsRequiredSubscribeOnCurrentThread())
+        {
+            this.source = source;
+            this.comparer = comparer;
+        }
+
+        protected override IDisposable SubscribeCore(IObserver<T> observer, IDisposable cancel)
+        {
+            return source.Subscribe(new DistinctUntilChanged(this, observer, cancel));
+        }
+
+        class DistinctUntilChanged : OperatorObserverBase<T, T>
+        {
+            readonly DistinctUntilChangedObservable<T> parent;
+            bool isFirst = true;
+            T prevKey = default(T);
+
+            public DistinctUntilChanged(DistinctUntilChangedObservable<T> parent, IObserver<T> observer, IDisposable cancel)
+                : base(observer, cancel)
+            {
+                this.parent = parent;
+            }
+
+            public override void OnNext(T value)
+            {
+                T currentKey;
+                try
+                {
+                    currentKey = value;
+                }
+                catch (Exception exception)
+                {
+                    try { observer.OnError(exception); } finally { Dispose(); }
+                    return;
+                }
+
+                var sameKey = false;
+                if (isFirst)
+                {
+                    isFirst = false;
+                }
+                else
+                {
+                    try
+                    {
+                        sameKey = parent.comparer.Equals(currentKey, prevKey);
+                    }
+                    catch (Exception ex)
+                    {
+                        try { observer.OnError(ex); } finally { Dispose(); }
+                        return;
+                    }
+                }
+
+                if (!sameKey)
+                {
+                    prevKey = currentKey;
+                    observer.OnNext(value);
+                }
+            }
+
+            public override void OnError(Exception error)
+            {
+                try { observer.OnError(error); } finally { Dispose(); }
+            }
+
+            public override void OnCompleted()
+            {
+                try { observer.OnCompleted(); } finally { Dispose(); }
+            }
+        }
+    }
+
+    internal class DistinctUntilChangedObservable<T, TKey> : OperatorObservableBase<T>
+    {
+        readonly IObservable<T> source;
+        readonly IEqualityComparer<TKey> comparer;
+        readonly Func<T, TKey> keySelector;
+
+        public DistinctUntilChangedObservable(IObservable<T> source, Func<T, TKey> keySelector, IEqualityComparer<TKey> comparer)
+            : base(source.IsRequiredSubscribeOnCurrentThread())
+        {
+            this.source = source;
+            this.comparer = comparer;
+            this.keySelector = keySelector;
+        }
+
+        protected override IDisposable SubscribeCore(IObserver<T> observer, IDisposable cancel)
+        {
+            return source.Subscribe(new DistinctUntilChanged(this, observer, cancel));
+        }
+
+        class DistinctUntilChanged : OperatorObserverBase<T, T>
+        {
+            readonly DistinctUntilChangedObservable<T, TKey> parent;
+            bool isFirst = true;
+            TKey prevKey = default(TKey);
+
+            public DistinctUntilChanged(DistinctUntilChangedObservable<T, TKey> parent, IObserver<T> observer, IDisposable cancel)
+                : base(observer, cancel)
+            {
+                this.parent = parent;
+            }
+
+            public override void OnNext(T value)
+            {
+                TKey currentKey;
+                try
+                {
+                    currentKey = parent.keySelector(value);
+                }
+                catch (Exception exception)
+                {
+                    try { observer.OnError(exception); } finally { Dispose(); }
+                    return;
+                }
+
+                var sameKey = false;
+                if (isFirst)
+                {
+                    isFirst = false;
+                }
+                else
+                {
+                    try
+                    {
+                        sameKey = parent.comparer.Equals(currentKey, prevKey);
+                    }
+                    catch (Exception ex)
+                    {
+                        try { observer.OnError(ex); } finally { Dispose(); }
+                        return;
+                    }
+                }
+
+                if (!sameKey)
+                {
+                    prevKey = currentKey;
+                    observer.OnNext(value);
+                }
+            }
+
+            public override void OnError(Exception error)
+            {
+                try { observer.OnError(error); } finally { Dispose(); }
+            }
+
+            public override void OnCompleted()
+            {
+                try { observer.OnCompleted(); } finally { Dispose(); }
+            }
+        }
+    }
+}