67 lines
2.1 KiB
GDScript3
67 lines
2.1 KiB
GDScript3
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static func multicast_(
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subject : SubjectBase = null,
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subject_factory = null,
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mapper = null
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) -> Callable:
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# """Multicasts the source sequence notifications through an
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# instantiated subject into all uses of the sequence within a mapper
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# function. Each subscription to the resulting sequence causes a
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# separate multicast invocation, exposing the sequence resulting from
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# the mapper function's invocation. For specializations with fixed
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# subject types, see Publish, PublishLast, and Replay.
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#
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# Examples:
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# >>> var res = GDRx.op.multicast(observable)
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# >>> var res = GDRx.op.multicast(
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# null,
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# func(scheduler): Subject.new(),
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# func(x): return x
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# )
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#
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# Args:
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# subject_factory: Factory function to create an intermediate
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# subject through which the source sequence's elements will be
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# multicast to the mapper function.
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# subject: Subject to push source elements into.
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# mapper: [Optional] Mapper function which can use the
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# multicasted source sequence subject to the policies enforced
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# by the created subject. Specified only if subject_factory
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# is a factory function.
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#
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# Returns:
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# An observable sequence that contains the elements of a sequence
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# produced by multicasting the source sequence within a mapper
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# function.
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# """
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var multicast = func(source : Observable) -> Observable:
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if subject_factory != null:
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var subscribe = func(
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observer : ObserverBase,
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scheduler : SchedulerBase = null
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) -> DisposableBase:
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if GDRx.assert_(subject_factory is Callable): return Disposable.new()
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var connectable = source.pipe1(
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GDRx.op.multicast(subject_factory.call(scheduler))
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)
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if GDRx.assert_(mapper is Callable): return Disposable.new()
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var subscription = mapper.call(connectable).subscribe(
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observer, GDRx.basic.noop, GDRx.basic.noop,
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scheduler
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)
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return CompositeDisposable.new([
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subscription, connectable.connect_observable(scheduler)
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])
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return Observable.new(subscribe)
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if subject == null:
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NullReferenceError.raise()
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var ret = ConnectableObservable.new(source, subject)
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return ret
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return multicast
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