UniRx 에셋 추가
This commit is contained in:
Mingu Kim
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Threading;
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using UniRx.InternalUtil;
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using UniRx.Triggers;
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#if !UniRxLibrary
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using ObservableUnity = UniRx.Observable;
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#endif
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namespace UniRx
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{
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public static partial class ObserveExtensions
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{
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/// <summary>
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/// Publish target property when value is changed. If source is destroyed/destructed, publish OnCompleted.
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/// </summary>
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/// <param name="fastDestroyCheck">If true and target is UnityObject, use destroyed check by additional component. It is faster check for lifecycle but needs initial cost.</param>
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public static IObservable<TProperty> ObserveEveryValueChanged<TSource, TProperty>(this TSource source, Func<TSource, TProperty> propertySelector, FrameCountType frameCountType = FrameCountType.Update, bool fastDestroyCheck = false)
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where TSource : class
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{
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return ObserveEveryValueChanged(source, propertySelector, frameCountType, UnityEqualityComparer.GetDefault<TProperty>(), fastDestroyCheck);
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}
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/// <summary>
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/// Publish target property when value is changed. If source is destroyed/destructed, publish OnCompleted.
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/// </summary>
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public static IObservable<TProperty> ObserveEveryValueChanged<TSource, TProperty>(this TSource source, Func<TSource, TProperty> propertySelector, FrameCountType frameCountType, IEqualityComparer<TProperty> comparer)
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where TSource : class
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{
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return ObserveEveryValueChanged(source, propertySelector, frameCountType, comparer, false);
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}
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/// <summary>
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/// Publish target property when value is changed. If source is destroyed/destructed, publish OnCompleted.
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/// </summary>
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/// <param name="fastDestroyCheck">If true and target is UnityObject, use destroyed check by additional component. It is faster check for lifecycle but needs initial cost.</param>
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public static IObservable<TProperty> ObserveEveryValueChanged<TSource, TProperty>(this TSource source, Func<TSource, TProperty> propertySelector, FrameCountType frameCountType, IEqualityComparer<TProperty> comparer, bool fastDestroyCheck)
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where TSource : class
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{
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if (source == null) return Observable.Empty<TProperty>();
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if (comparer == null) comparer = UnityEqualityComparer.GetDefault<TProperty>();
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var unityObject = source as UnityEngine.Object;
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var isUnityObject = source is UnityEngine.Object;
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if (isUnityObject && unityObject == null) return Observable.Empty<TProperty>();
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// MicroCoroutine does not publish value immediately, so publish value on subscribe.
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if (isUnityObject)
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{
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return ObservableUnity.FromMicroCoroutine<TProperty>((observer, cancellationToken) =>
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{
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if (unityObject != null)
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{
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var firstValue = default(TProperty);
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try
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{
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firstValue = propertySelector((TSource)(object)unityObject);
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}
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catch (Exception ex)
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{
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observer.OnError(ex);
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return EmptyEnumerator();
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}
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observer.OnNext(firstValue);
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return PublishUnityObjectValueChanged(unityObject, firstValue, propertySelector, comparer, observer, cancellationToken, fastDestroyCheck);
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}
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else
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{
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observer.OnCompleted();
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return EmptyEnumerator();
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}
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}, frameCountType);
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}
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else
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{
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var reference = new WeakReference(source);
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source = null;
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return ObservableUnity.FromMicroCoroutine<TProperty>((observer, cancellationToken) =>
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{
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var target = reference.Target;
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if (target != null)
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{
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var firstValue = default(TProperty);
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try
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{
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firstValue = propertySelector((TSource)target);
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}
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catch (Exception ex)
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{
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observer.OnError(ex);
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return EmptyEnumerator();
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}
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finally
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{
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target = null;
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}
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observer.OnNext(firstValue);
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return PublishPocoValueChanged(reference, firstValue, propertySelector, comparer, observer, cancellationToken);
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}
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else
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{
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observer.OnCompleted();
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return EmptyEnumerator();
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}
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}, frameCountType);
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}
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}
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static IEnumerator EmptyEnumerator()
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{
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yield break;
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}
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static IEnumerator PublishPocoValueChanged<TSource, TProperty>(WeakReference sourceReference, TProperty firstValue, Func<TSource, TProperty> propertySelector, IEqualityComparer<TProperty> comparer, IObserver<TProperty> observer, CancellationToken cancellationToken)
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{
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var currentValue = default(TProperty);
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var prevValue = firstValue;
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while (!cancellationToken.IsCancellationRequested)
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{
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var target = sourceReference.Target;
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if (target != null)
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{
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try
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{
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currentValue = propertySelector((TSource)target);
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}
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catch (Exception ex)
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{
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observer.OnError(ex);
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yield break;
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}
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finally
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{
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target = null; // remove reference(must need!)
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}
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}
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else
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{
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observer.OnCompleted();
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yield break;
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}
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if (!comparer.Equals(currentValue, prevValue))
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{
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observer.OnNext(currentValue);
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prevValue = currentValue;
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}
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yield return null;
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}
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}
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static IEnumerator PublishUnityObjectValueChanged<TSource, TProperty>(UnityEngine.Object unityObject, TProperty firstValue, Func<TSource, TProperty> propertySelector, IEqualityComparer<TProperty> comparer, IObserver<TProperty> observer, CancellationToken cancellationToken, bool fastDestroyCheck)
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{
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var currentValue = default(TProperty);
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var prevValue = firstValue;
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var source = (TSource)(object)unityObject;
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if (fastDestroyCheck)
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{
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ObservableDestroyTrigger destroyTrigger = null;
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{
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var gameObject = unityObject as UnityEngine.GameObject;
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if (gameObject == null)
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{
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var comp = unityObject as UnityEngine.Component;
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if (comp != null)
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{
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gameObject = comp.gameObject;
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}
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}
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// can't use faster path
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if (gameObject == null) goto STANDARD_LOOP;
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destroyTrigger = GetOrAddDestroyTrigger(gameObject);
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}
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// fast compare path
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while (!cancellationToken.IsCancellationRequested)
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{
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var isDestroyed = destroyTrigger.IsActivated
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? !destroyTrigger.IsCalledOnDestroy
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: (unityObject != null);
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if (isDestroyed)
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{
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try
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{
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currentValue = propertySelector(source);
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}
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catch (Exception ex)
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{
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observer.OnError(ex);
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yield break;
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}
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}
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else
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{
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observer.OnCompleted();
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yield break;
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}
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if (!comparer.Equals(currentValue, prevValue))
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{
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observer.OnNext(currentValue);
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prevValue = currentValue;
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}
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yield return null;
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}
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yield break;
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}
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STANDARD_LOOP:
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while (!cancellationToken.IsCancellationRequested)
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{
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if (unityObject != null)
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{
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try
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{
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currentValue = propertySelector(source);
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}
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catch (Exception ex)
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{
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observer.OnError(ex);
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yield break;
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}
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}
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else
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{
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observer.OnCompleted();
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yield break;
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}
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if (!comparer.Equals(currentValue, prevValue))
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{
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observer.OnNext(currentValue);
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prevValue = currentValue;
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}
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yield return null;
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}
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}
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static ObservableDestroyTrigger GetOrAddDestroyTrigger(UnityEngine.GameObject go)
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{
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var dt = go.GetComponent<ObservableDestroyTrigger>();
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if (dt == null)
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{
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dt = go.AddComponent<ObservableDestroyTrigger>();
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}
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return dt;
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}
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}
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}
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