49 lines
1.4 KiB
GDScript3
49 lines
1.4 KiB
GDScript3
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## Converts a callback function to an observable sequence.
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## [br]
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## [b]Args:[/b]
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## [br]
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## [code]fun[/code] Function with a callback as the last argument to
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## convert to an Observable sequence.
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## [br]
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## [code]mapper[/code] [Optional] A mapper which takes the arguments
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## from the callback to produce a single item to yield on next.
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## [br][br]
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## [b]Returns:[/b]
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## [br]
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## A function, when executed with the required arguments minus
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## the callback, produces an Observable sequence with a single value of
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## the arguments to the callback as a list.
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static func from_callback(
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fun : Callable = func(_args : Array, _cb : Callable): return,
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mapper = null
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) -> Callable:
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var function = func(args : Array) -> Observable:
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var arguments = args
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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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var handler = func(args : Array):
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var results = RefValue.Set(args)
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if mapper != null:
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if GDRx.try(func():
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results.v = mapper.call(args)
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) \
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.catch("Error", func(e):
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observer.on_error(e)
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).end_try_catch():
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return Disposable.new()
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observer.on_next(results.v)
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else:
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observer.on_next(results.v)
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observer.on_completed()
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fun.call(arguments, handler)
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return Disposable.new()
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return Observable.new(subscribe)
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return function
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