static IEnumerator PublishPocoValueChanged <TSource, TProperty>(WeakReference sourceReference, Func <TSource, TProperty> propertySelector, FrameCountType frameCountType, IObserver <TProperty> observer, CancellationToken cancellationToken)
{
var comparer = UnityEqualityComparer.GetDefault <TProperty>();
var isFirst = true;
var currentValue = default(TProperty);
var prevValue = default(TProperty);
var yieldInstruction = frameCountType.GetYieldInstruction();
while (!cancellationToken.IsCancellationRequested)
{
var target = sourceReference.Target;
if (target != null)
{
try
{
currentValue = propertySelector((TSource)target);
}
catch (Exception ex)
{
observer.OnError(ex);
yield break;
}
finally
{
target = null; // remove reference(must need!)
}
}
else
{
observer.OnCompleted();
yield break;
}
if (isFirst || !comparer.Equals(currentValue, prevValue))
{
isFirst = false;
observer.OnNext(currentValue);
prevValue = currentValue;
}
yield return(yieldInstruction);
}
}
static IEnumerator PublishUnityObjectValueChanged <TSource, TProperty>(UnityEngine.Object unityObject, Func <TSource, TProperty> propertySelector, FrameCountType frameCountType, IObserver <TProperty> observer, CancellationToken cancellationToken)
{
var comparer = UnityEqualityComparer.GetDefault <TProperty>();
var isFirst = true;
var currentValue = default(TProperty);
var prevValue = default(TProperty);
var yieldInstruction = frameCountType.GetYieldInstruction();
var source = (TSource)(object)unityObject;
while (!cancellationToken.IsCancellationRequested)
{
if (unityObject != null)
{
try
{
currentValue = propertySelector(source);
}
catch (Exception ex)
{
observer.OnError(ex);
yield break;
}
}
else
{
observer.OnCompleted();
yield break;
}
if (isFirst || !comparer.Equals(currentValue, prevValue))
{
isFirst = false;
observer.OnNext(currentValue);
prevValue = currentValue;
}
yield return(yieldInstruction);
}
}
/// <summary>
/// Publish target property when value is changed. If source is destroyed/destructed, publish OnCompleted.
/// </summary>
/// <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>
public static IObservable <TProperty> ObserveEveryValueChanged <TSource, TProperty>(this TSource source, Func <TSource, TProperty> propertySelector, FrameCountType frameCountType, IEqualityComparer <TProperty> comparer, bool fastDestroyCheck)
where TSource : class
{
if (source == null)
{
return(Observable.Empty <TProperty>());
}
if (comparer == null)
{
comparer = UnityEqualityComparer.GetDefault <TProperty>();
}
var unityObject = source as UnityEngine.Object;
var isUnityObject = source is UnityEngine.Object;
if (isUnityObject && unityObject == null)
{
return(Observable.Empty <TProperty>());
}
// MicroCoroutine does not publish value immediately, so publish value on subscribe.
if (isUnityObject)
{
return(ObservableUnity.FromMicroCoroutine <TProperty>((observer, cancellationToken) =>
{
if (unityObject != null)
{
var firstValue = default(TProperty);
try
{
firstValue = propertySelector((TSource)(object)unityObject);
}
catch (Exception ex)
{
observer.OnError(ex);
return EmptyEnumerator();
}
observer.OnNext(firstValue);
return PublishUnityObjectValueChanged(unityObject, firstValue, propertySelector, comparer, observer, cancellationToken, fastDestroyCheck);
}
else
{
observer.OnCompleted();
return EmptyEnumerator();
}
}, frameCountType));
}
else
{
var reference = new WeakReference(source);
source = null;
return(ObservableUnity.FromMicroCoroutine <TProperty>((observer, cancellationToken) =>
{
var target = reference.Target;
if (target != null)
{
var firstValue = default(TProperty);
try
{
firstValue = propertySelector((TSource)target);
}
catch (Exception ex)
{
observer.OnError(ex);
return EmptyEnumerator();
}
finally
{
target = null;
}
observer.OnNext(firstValue);
return PublishPocoValueChanged(reference, firstValue, propertySelector, comparer, observer, cancellationToken);
}
else
{
observer.OnCompleted();
return EmptyEnumerator();
}
}, frameCountType));
}
}
/// <summary>
/// Publish target property when value is changed. If source is destroyed/destructed, publish OnCompleted.
/// </summary>
/// <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>
public static IObservable <TProperty> ObserveEveryValueChanged <TSource, TProperty>(this TSource source, Func <TSource, TProperty> propertySelector, FrameCountType frameCountType = FrameCountType.Update, bool fastDestroyCheck = false)
where TSource : class
{
return(ObserveEveryValueChanged(source, propertySelector, frameCountType, UnityEqualityComparer.GetDefault <TProperty>(), fastDestroyCheck));
}
public static UniRx.IObservable <TProperty> ObserveEveryValueChanged <TSource, TProperty>(this TSource source, Func <TSource, TProperty> propertySelector, FrameCountType frameCountType, IEqualityComparer <TProperty> comparer, bool fastDestroyCheck) where TSource : class
{
if (source == null)
{
return(Observable.Empty <TProperty>());
}
if (comparer == null)
{
comparer = UnityEqualityComparer.GetDefault <TProperty>();
}
UnityEngine.Object unityObject = source as UnityEngine.Object;
bool flag = source is UnityEngine.Object;
if (flag && unityObject == null)
{
return(Observable.Empty <TProperty>());
}
if (flag)
{
return(Observable.FromMicroCoroutine(delegate(UniRx.IObserver <TProperty> observer, CancellationToken cancellationToken)
{
if (unityObject != null)
{
TProperty val2 = default(TProperty);
try
{
val2 = propertySelector((TSource)(object)unityObject);
}
catch (Exception error2)
{
observer.OnError(error2);
return EmptyEnumerator();
}
observer.OnNext(val2);
return PublishUnityObjectValueChanged(unityObject, val2, propertySelector, comparer, observer, cancellationToken, fastDestroyCheck);
}
observer.OnCompleted();
return EmptyEnumerator();
}, frameCountType));
}
WeakReference reference = new WeakReference(source);
source = (TSource)null;
return(Observable.FromMicroCoroutine(delegate(UniRx.IObserver <TProperty> observer, CancellationToken cancellationToken)
{
object target = reference.Target;
if (target != null)
{
TProperty val = default(TProperty);
try
{
val = propertySelector((TSource)target);
}
catch (Exception error)
{
observer.OnError(error);
return EmptyEnumerator();
}
finally
{
target = null;
}
observer.OnNext(val);
return PublishPocoValueChanged(reference, val, propertySelector, comparer, observer, cancellationToken);
}
observer.OnCompleted();
return EmptyEnumerator();
}, frameCountType));
}