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| 1 | +// |
| 2 | +// ASBinder.swift |
| 3 | +// |
| 4 | +// Created by Geektree0101. |
| 5 | +// Copyright(C) 2018 Geektree0101. All rights reserved. |
| 6 | +// |
| 7 | + |
| 8 | +import AsyncDisplayKit |
| 9 | +import RxSwift |
| 10 | +import RxCocoa |
| 11 | + |
| 12 | +public struct ASBinder<Value>: ASObserverType { |
| 13 | + public typealias E = Value |
| 14 | + |
| 15 | + private let _binding: (Event<Value>, ASDisplayNode?) -> () |
| 16 | + |
| 17 | + public init<Target: AnyObject>(_ target: Target, |
| 18 | + scheduler: ImmediateSchedulerType = MainScheduler(), |
| 19 | + binding: @escaping (Target, Value) -> ()) { |
| 20 | + weak var weakTarget = target |
| 21 | + |
| 22 | + _binding = { event, node in |
| 23 | + switch event { |
| 24 | + case .next(let element): |
| 25 | + _ = scheduler.schedule(element) { element in |
| 26 | + if let target = weakTarget { |
| 27 | + binding(target, element) |
| 28 | + |
| 29 | + // set needs layout targeted node |
| 30 | + if let `node` = node { |
| 31 | + node.setNeedsLayout() |
| 32 | + } |
| 33 | + } |
| 34 | + return Disposables.create() |
| 35 | + } |
| 36 | + case .error(let error): |
| 37 | + #if DEBUG |
| 38 | + fatalError(error.localizedDescription) |
| 39 | + #else |
| 40 | + print(error) |
| 41 | + #endif |
| 42 | + case .completed: |
| 43 | + break |
| 44 | + } |
| 45 | + } |
| 46 | + } |
| 47 | + |
| 48 | + public func on(_ event: Event<Value>, node: ASDisplayNode?) { |
| 49 | + _binding(event, node) |
| 50 | + } |
| 51 | + |
| 52 | + public func on(_ event: Event<Value>) { |
| 53 | + _binding(event, nil) |
| 54 | + } |
| 55 | +} |
| 56 | + |
| 57 | +public protocol ASObserverType: ObserverType { |
| 58 | + func on(_ event: Event<E>, node: ASDisplayNode?) |
| 59 | +} |
| 60 | + |
| 61 | +extension ObservableType { |
| 62 | + public func bind<O>(to observer: O, |
| 63 | + setNeedsLayout node: ASDisplayNode? = nil) |
| 64 | + -> Disposable where O : ASObserverType, Self.E == O.E { |
| 65 | + return subscribe { event in |
| 66 | + switch event { |
| 67 | + case .next: |
| 68 | + observer.on(event, node: node) |
| 69 | + case .error(let error): |
| 70 | + #if DEBUG |
| 71 | + fatalError(error.localizedDescription) |
| 72 | + #else |
| 73 | + print(error) |
| 74 | + #endif |
| 75 | + case .completed: |
| 76 | + break |
| 77 | + } |
| 78 | + } |
| 79 | + } |
| 80 | + |
| 81 | + public func bind<O: ASObserverType>(to observer: O, |
| 82 | + setNeedsLayout node: ASDisplayNode? = nil) |
| 83 | + -> Disposable where O.E == E? { |
| 84 | + return self.map { $0 }.subscribe { observerEvent in |
| 85 | + switch observerEvent { |
| 86 | + case .next: |
| 87 | + observer.on(observerEvent.map({ Optional<Self.E>($0) }), |
| 88 | + node: node) |
| 89 | + case .error(let error): |
| 90 | + #if DEBUG |
| 91 | + fatalError(error.localizedDescription) |
| 92 | + #else |
| 93 | + print(error) |
| 94 | + #endif |
| 95 | + case .completed: |
| 96 | + break |
| 97 | + } |
| 98 | + } |
| 99 | + } |
| 100 | + |
| 101 | + public func bind(to relay: PublishRelay<E>, |
| 102 | + setNeedsLayout node: ASDisplayNode?) -> Disposable { |
| 103 | + return subscribe { e in |
| 104 | + switch e { |
| 105 | + case let .next(element): |
| 106 | + relay.accept(element) |
| 107 | + node?.setNeedsLayout() |
| 108 | + case let .error(error): |
| 109 | + let log = "Binding error to publish relay: \(error)" |
| 110 | + #if DEBUG |
| 111 | + fatalError(log) |
| 112 | + #else |
| 113 | + print(log) |
| 114 | + #endif |
| 115 | + case .completed: |
| 116 | + break |
| 117 | + } |
| 118 | + } |
| 119 | + } |
| 120 | + |
| 121 | + public func bind(to relay: PublishRelay<E?>, |
| 122 | + setNeedsLayout node: ASDisplayNode? = nil) -> Disposable { |
| 123 | + return self.map { $0 as E? } |
| 124 | + .bind(to: relay, setNeedsLayout: node) |
| 125 | + } |
| 126 | + |
| 127 | + public func bind(to relay: BehaviorRelay<E>, |
| 128 | + setNeedsLayout node: ASDisplayNode? = nil) -> Disposable { |
| 129 | + return subscribe { e in |
| 130 | + switch e { |
| 131 | + case let .next(element): |
| 132 | + relay.accept(element) |
| 133 | + node?.setNeedsLayout() |
| 134 | + case let .error(error): |
| 135 | + let log = "Binding error to behavior relay: \(error)" |
| 136 | + #if DEBUG |
| 137 | + fatalError(log) |
| 138 | + #else |
| 139 | + print(log) |
| 140 | + #endif |
| 141 | + case .completed: |
| 142 | + break |
| 143 | + } |
| 144 | + } |
| 145 | + } |
| 146 | + |
| 147 | + public func bind(to relay: BehaviorRelay<E?>, |
| 148 | + setNeedsLayout node: ASDisplayNode? = nil) -> Disposable { |
| 149 | + return self.map { $0 as E? } |
| 150 | + .bind(to: relay, setNeedsLayout: node) |
| 151 | + } |
| 152 | +} |
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