45 lines
1.2 KiB
GDScript3
45 lines
1.2 KiB
GDScript3
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static func generate_(
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initial_state,
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condition : Callable = GDRx.basic.default_condition,
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iterate : Callable = GDRx.basic.identity
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) -> Observable:
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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 scheduler_ : SchedulerBase = scheduler if scheduler != null else CurrentThreadScheduler.singleton()
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var first = RefValue.Set(true)
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var state = RefValue.Set(initial_state)
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var mad = MultipleAssignmentDisposable.new()
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var action = func(scheduler : SchedulerBase, _state, action_ : Callable):
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var has_result = RefValue.Set(false)
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var result = RefValue.Null()
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if GDRx.try(func():
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if first.v:
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first.v = false
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else:
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state.v = iterate.call(state.v)
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has_result.v = condition.call(state.v)
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if has_result.v:
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result.v = state.v
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) \
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.catch("Error", func(err):
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observer.on_error(err)
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) \
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.end_try_catch(): return
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if has_result.v:
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observer.on_next(result.v)
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mad.disposable = scheduler.schedule(action_.bind(action_))
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else:
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observer.on_completed()
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mad.disposable = scheduler_.schedule(action.bind(action))
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return mad
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return Observable.new(subscribe)
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