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Code Issues 95 Packages Projects Releases 10 Wiki Activity

Removed ObservableObject implementations of ListPublisher/ObjectPublisher in favor of LiveList/LiveObject and ".reactive" publishers

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John Estropia
2021-03-07 10:38:53 +09:00
parent 098e560fcc
commit 0b127956d3
5 changed files with 38 additions and 376 deletions
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175
Sources/ListPublisher.swift
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@@ -25,16 +25,6 @@
import CoreData
#if canImport(Combine)
import Combine
#endif
#if canImport(SwiftUI)
import SwiftUI
#endif
// MARK: - ListPublisher
@@ -89,13 +79,8 @@ public final class ListPublisher<O: DynamicObject>: Hashable {
*/
public fileprivate(set) var snapshot: ListSnapshot<O> = .init() {
willSet {
self.willChange()
}
didSet {
self.didChange()
self.notifyObservers()
}
}
@@ -315,11 +300,6 @@ public final class ListPublisher<O: DynamicObject>: Hashable {
self.fetchedResultsControllerDelegate.fetchedResultsController = nil
self.observers.removeAllObjects()
}
// MARK: FilePrivate
fileprivate let rawObjectWillChange: Any?
// MARK: Private
@@ -375,21 +355,6 @@ public final class ListPublisher<O: DynamicObject>: Hashable {
applyFetchClauses: applyFetchClauses
)
if #available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, *) {
#if canImport(Combine)
self.rawObjectWillChange = ObservableObjectPublisher()
#else
self.rawObjectWillChange = nil
#endif
}
else {
self.rawObjectWillChange = nil
}
self.fetchedResultsControllerDelegate.handler = self
try! self.fetchedResultsController.performFetchFromSpecifiedStores()
@@ -428,143 +393,3 @@ extension ListPublisher: FetchedDiffableDataSourceSnapshotHandler {
)
}
}
#if canImport(Combine)
import Combine
@available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, *)
extension ListPublisher: ObservableObject {}
@available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, *)
extension ListPublisher: Publisher {
// MARK: Publisher
public typealias Output = ListSnapshot<O>
public typealias Failure = Never
public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
subscriber.receive(
subscription: ListSnapshotSubscription(
publisher: self,
subscriber: subscriber
)
)
}
// MARK: - ListSnapshotSubscriber
fileprivate final class ListSnapshotSubscriber: Subscriber {
// MARK: Subscriber
typealias Failure = Never
func receive(subscription: Subscription) {
subscription.request(.unlimited)
}
func receive(_ input: Output) -> Subscribers.Demand {
return .unlimited
}
func receive(completion: Subscribers.Completion<Failure>) {}
}
// MARK: - ListSnapshotSubscription
fileprivate final class ListSnapshotSubscription<S: Subscriber>: Subscription where S.Input == Output, S.Failure == Never {
// MARK: FilePrivate
init(publisher: ListPublisher<O>, subscriber: S) {
self.publisher = publisher
self.subscriber = subscriber
}
// MARK: Subscription
func request(_ demand: Subscribers.Demand) {
guard demand > 0 else {
return
}
self.publisher.addObserver(self) { [weak self] (publisher) in
guard let self = self, let subscriber = self.subscriber else {
return
}
_ = subscriber.receive(publisher.snapshot)
}
}
// MARK: Cancellable
func cancel() {
self.publisher.removeObserver(self)
self.subscriber = nil
}
// MARK: Private
private let publisher: ListPublisher<O>
private var subscriber: S?
}
}
#endif
// MARK: - ListPublisher
extension ListPublisher {
// MARK: ObservableObject
#if canImport(Combine)
@available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, *)
public var objectWillChange: ObservableObjectPublisher {
return self.rawObjectWillChange! as! ObservableObjectPublisher
}
#endif
fileprivate func willChange() {
guard #available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, *) else {
return
}
#if canImport(Combine)
#if canImport(SwiftUI)
withAnimation {
self.objectWillChange.send()
}
#endif
self.objectWillChange.send()
#endif
}
fileprivate func didChange() {
// nothing
}
}