protected FilterSectionSubjectBase(IPushObservable <TIn> observable, KeepingState initialState, Func <TIn, SwitchBehavior> switchToKeep, Func <TIn, SwitchBehavior> switchToIgnore) : base(observable.CancellationToken)
{
this.Subscription = observable.Subscribe(HandlePushValue, this.Complete, this.PushException);
SwitchToKeep = switchToKeep;
SwitchToIgnore = switchToIgnore;
CurrentState = initialState;
}
public FilterSectionSubject(IPushObservable <TIn> observable, KeepingState initialState, Func <TIn, SwitchBehavior> switcher, Func <TIn, int, TOut> resultSelector) : this(observable, resultSelector)
{
_currentState = initialState;
_switchToKeep = switcher;
_switchToIgnore = switcher;
_sectionIndex = _currentState == KeepingState.Ignore ? -1 : 0;
}
private FilterSectionSubject(IPushObservable <TIn> observable, Func <TIn, int, TOut> resultSelector)
{
_resultSelector = resultSelector;
this._subscription = observable.Subscribe(HandlePushValue, this.Complete, this.PushException);
_currentState = KeepingState.Ignore;
_sectionIndex = _currentState == KeepingState.Ignore ? -1 : 0;
}
private void ProcessCurrentKeep(TIn value)
{
var switchRes = _switchToIgnore(value);
switch (switchRes)
{
case SwitchBehavior.SwitchIgnoreCurrent:
_currentState = KeepingState.Ignore;
break;
case SwitchBehavior.SwitchKeepCurrent:
_currentState = KeepingState.Ignore;
this.PushValue(this._resultSelector(value, _sectionIndex));
break;
default:
if (_currentState == KeepingState.Keep)
{
this.PushValue(this._resultSelector(value, _sectionIndex));
}
break;
}
}
public FilterSectionSubject(IPushObservable <TIn> observable, KeepingState initialState, Func <TIn, SwitchBehavior> switcher, Func <TIn, int, TOut> resultSelector)
: this(observable, initialState, switcher, switcher, resultSelector)
{
}
public static IPushObservable <TOut> FilterSection <TIn, TOut>(this IPushObservable <TIn> observable, KeepingState initialState, Func <TIn, SwitchBehavior> switchToKeep, Func <TIn, SwitchBehavior> switchToIgnore, Func <TIn, int, TOut> resultSelector)
{
return(new FilterSectionSubject <TIn, TOut>(observable, initialState, switchToKeep, switchToIgnore, resultSelector));
}
public FilterSectionSubject(IPushObservable <TIn> observable, KeepingState initialState, Func <TIn, SwitchBehavior> switchToKeep, Func <TIn, SwitchBehavior> switchToIgnore, Func <TIn, int, TOut> resultSelector)
: base(observable, initialState, switchToKeep, switchToIgnore)
{
_resultSelector = resultSelector;
_sectionIndex = initialState == KeepingState.Ignore ? -1 : 0;
}
public static IPushObservable <T> FilterSection <T>(this IPushObservable <T> observable, KeepingState initialState, Func <T, SwitchBehavior> switchToKeep, Func <T, SwitchBehavior> switchToIgnore)
{
return(new FilterSectionSubject <T>(observable, initialState, switchToKeep, switchToIgnore));
}
protected void SetCurrentState(KeepingState currentState) => CurrentState = currentState;
public static IStream <TIn> SelectSection <TIn>(this IStream <TIn> stream, string name, KeepingState initialState, Func <TIn, SwitchBehavior> switcher)
{
return(new SelectSectionStreamNode <TIn>(name, new SelectSectionArgs <TIn>
{
Stream = stream,
InitialState = initialState,
SwitchToKeep = switcher
}).Output);
}
public static IStream <TOut> SelectSection <TIn, TOut>(this IStream <TIn> stream, string name, KeepingState initialState, Func <TIn, SwitchBehavior> switchToKeep, Func <TIn, SwitchBehavior> switchToIgnore, Func <TIn, int, TOut> resultSelector)
{
return(new SelectSectionStreamNode <TIn, TOut>(name, new SelectSectionArgs <TIn, TOut>
{
Stream = stream,
InitialState = initialState,
SwitchToKeep = switchToKeep,
SwitchToIgnore = switchToIgnore,
ResultSelector = resultSelector
}).Output);
}
