Tusker/Packages/ComposeUI/Sources/ComposeUI/OptionalObservedObject.swift

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//
// OptionalObservedObject.swift
// ComposeUI
//
// Created by Shadowfacts on 4/15/23.
//
import SwiftUI
import Combine
@propertyWrapper
struct OptionalObservedObject<T: ObservableObject>: DynamicProperty {
private class Republisher: ObservableObject {
var cancellable: AnyCancellable?
var wrapped: T? {
didSet {
cancellable?.cancel()
cancellable = wrapped?.objectWillChange
.receive(on: RunLoop.main)
.sink { [unowned self] _ in
self.objectWillChange.send()
}
}
}
}
@StateObject private var republisher = Republisher()
var wrappedValue: T?
func update() {
republisher.wrapped = wrappedValue
}
}