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added uiControl publisher

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Signed-off-by: Matt Bruce <matt.bruce@verizon.com>
This commit is contained in:
Matt Bruce 2022-08-18 09:32:56 -05:00
parent 0bbdf6ddf0
commit 8fd2c833f0
2 changed files with 77 additions and 0 deletions
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4
VDS.xcodeproj/project.pbxproj
View File

@ -47,6 +47,7 @@
EAB1D2CD28ABE76100DAE764 /* Withable.swift in Sources */ = {isa = PBXBuildFile; fileRef = EAB1D2CC28ABE76000DAE764 /* Withable.swift */; };
EAB1D2CF28ABEF2B00DAE764 /* Typography.swift in Sources */ = {isa = PBXBuildFile; fileRef = EAB1D2CE28ABEF2B00DAE764 /* Typography.swift */; };
EAB1D2E628AE842000DAE764 /* Publisher+Bind.swift in Sources */ = {isa = PBXBuildFile; fileRef = EAB1D2E328AE842000DAE764 /* Publisher+Bind.swift */; };
EAB1D2EA28AE84AA00DAE764 /* UIControlPublisher.swift in Sources */ = {isa = PBXBuildFile; fileRef = EAB1D2E928AE84AA00DAE764 /* UIControlPublisher.swift */; };
EAF7F0952899861000B287F5 /* Checkbox.swift in Sources */ = {isa = PBXBuildFile; fileRef = EAF7F0932899861000B287F5 /* Checkbox.swift */; };
EAF7F0962899861000B287F5 /* CheckboxModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = EAF7F0942899861000B287F5 /* CheckboxModel.swift */; };
EAF7F09A2899B17200B287F5 /* CATransaction.swift in Sources */ = {isa = PBXBuildFile; fileRef = EAF7F0992899B17200B287F5 /* CATransaction.swift */; };
@ -128,6 +129,7 @@
EAB1D2CC28ABE76000DAE764 /* Withable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Withable.swift; sourceTree = "<group>"; };
EAB1D2CE28ABEF2B00DAE764 /* Typography.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Typography.swift; sourceTree = "<group>"; };
EAB1D2E328AE842000DAE764 /* Publisher+Bind.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Publisher+Bind.swift"; sourceTree = "<group>"; };
EAB1D2E928AE84AA00DAE764 /* UIControlPublisher.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UIControlPublisher.swift; sourceTree = "<group>"; };
EAF7F0932899861000B287F5 /* Checkbox.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Checkbox.swift; sourceTree = "<group>"; };
EAF7F0942899861000B287F5 /* CheckboxModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CheckboxModel.swift; sourceTree = "<group>"; };
EAF7F0992899B17200B287F5 /* CATransaction.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CATransaction.swift; sourceTree = "<group>"; };
@ -374,6 +376,7 @@
children = (
EAB1D2E328AE842000DAE764 /* Publisher+Bind.swift */,
EAB1D2C628A6E76300DAE764 /* ModelHandlerPublisher.swift */,
EAB1D2E928AE84AA00DAE764 /* UIControlPublisher.swift */,
);
path = Publishers;
sourceTree = "<group>";
@ -560,6 +563,7 @@
EA33624728931B050071C351 /* Initable.swift in Sources */,
EAF7F0A4289B017C00B287F5 /* LabelAttributeModel.swift in Sources */,
EAF7F0B1289B177F00B287F5 /* LabelAttributeColor.swift in Sources */,
EAB1D2EA28AE84AA00DAE764 /* UIControlPublisher.swift in Sources */,
EAF7F13328A2A16500B287F5 /* LabelAttributeAttachment.swift in Sources */,
EAF7F0B9289C139800B287F5 /* ColorConfiguration.swift in Sources */,
EA3361BD288B2C760071C351 /* TypeAlias.swift in Sources */,

73
VDS/Publishers/UIControlPublisher.swift Normal file
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@ -0,0 +1,73 @@
//
// UIControlPublisher.swift
// VDS
//
// Created by Matt Bruce on 8/18/22.
//
import Foundation
import UIKit
import Combine
/// A custom subscription to capture UIControl target events.
final class UIControlSubscription<SubscriberType: Subscriber, Control: UIControl>: Subscription where SubscriberType.Input == Control {
private var subscriber: SubscriberType?
private let control: Control
init(subscriber: SubscriberType, control: Control, event: UIControl.Event) {
self.subscriber = subscriber
self.control = control
control.addTarget(self, action: #selector(eventHandler), for: event)
}
func request(_ demand: Subscribers.Demand) {
// We do nothing here as we only want to send events when they occur.
// See, for more info: https://developer.apple.com/documentation/combine/subscribers/demand
}
func cancel() {
subscriber = nil
}
@objc private func eventHandler() {
_ = subscriber?.receive(control)
}
deinit {
print("UIControlTarget deinit")
}
}
/// A custom `Publisher` to work with our custom `UIControlSubscription`.
struct UIControlPublisher<Control: UIControl>: Publisher {
typealias Output = Control
typealias Failure = Never
let control: Control
let controlEvents: UIControl.Event
init(control: Control, events: UIControl.Event) {
self.control = control
self.controlEvents = events
}
/// This function is called to attach the specified `Subscriber` to this `Publisher` by `subscribe(_:)`
///
/// - SeeAlso: `subscribe(_:)`
/// - Parameters:
/// - subscriber: The subscriber to attach to this `Publisher`.
/// once attached it can begin to receive values.
func receive<S>(subscriber: S) where S : Subscriber, S.Failure == UIControlPublisher.Failure, S.Input == UIControlPublisher.Output {
subscriber.receive(subscription: UIControlSubscription(subscriber: subscriber, control: control, event: controlEvents))
}
}
/// Extending the `UIControl` types to be able to produce a `UIControl.Event` publisher.
protocol CombineCompatible { }
extension UIControl: CombineCompatible { }
extension CombineCompatible where Self: UIControl {
func publisher(for events: UIControl.Event) -> UIControlPublisher<Self> {
return UIControlPublisher(control: self, events: events)
}
}