136 lines
3.9 KiB
Swift
136 lines
3.9 KiB
Swift
//
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// Control.swift
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// VDS
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//
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// Created by Matt Bruce on 7/22/22.
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//
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import Foundation
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import UIKit
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import Combine
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/// Base Class use to build Controls.
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@objc(VDSControl)
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open class Control: UIControl, ViewProtocol, UserInfoable, Clickable {
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//--------------------------------------------------
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// MARK: - Initializers
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//--------------------------------------------------
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required public init() {
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super.init(frame: .zero)
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initialSetup()
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}
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public override init(frame: CGRect) {
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super.init(frame: .zero)
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initialSetup()
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}
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public required init?(coder: NSCoder) {
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super.init(coder: coder)
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initialSetup()
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}
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//--------------------------------------------------
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// MARK: - Combine Properties
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//--------------------------------------------------
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open var subscribers = Set<AnyCancellable>()
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open var onClickSubscriber: AnyCancellable? {
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willSet {
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if let onClickSubscriber {
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onClickSubscriber.cancel()
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}
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}
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}
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//--------------------------------------------------
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// MARK: - Private Properties
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//--------------------------------------------------
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private var initialSetupPerformed = false
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//--------------------------------------------------
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// MARK: - Public Properties
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//--------------------------------------------------
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open var shouldUpdateView: Bool = true
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open var userInfo = [String: Primitive]()
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open var surface: Surface = .light { didSet { setNeedsUpdate() } }
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/// Whether the Control is selected or not.
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open override var isSelected: Bool { didSet { setNeedsUpdate() } }
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/// State of animating isHighlight.
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public var isHighlighting = false
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/// Whether the Control should handle the isHighlighted state.
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open var shouldHighlight: Bool { isHighlighting == false && onClickSubscriber != nil }
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/// Whether the Control is highlighted or not.
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open override var isHighlighted: Bool {
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didSet {
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if shouldHighlight {
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isHighlighting = true
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setNeedsUpdate()
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isHighlighting = false
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}
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}
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}
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/// Whether the Control is enabled or not.
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open override var isEnabled: Bool { didSet { setNeedsUpdate() } }
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//--------------------------------------------------
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// MARK: - Lifecycle
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//--------------------------------------------------
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open func initialSetup() {
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if !initialSetupPerformed {
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initialSetupPerformed = true
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setup()
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setNeedsUpdate()
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}
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}
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open func setup() {
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backgroundColor = .clear
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translatesAutoresizingMaskIntoConstraints = false
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insetsLayoutMarginsFromSafeArea = false
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}
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open func updateView() { }
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open func updateAccessibility() {
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if isSelected {
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accessibilityTraits.insert(.selected)
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} else {
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accessibilityTraits.remove(.selected)
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}
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if isEnabled {
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accessibilityTraits.remove(.notEnabled)
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} else {
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accessibilityTraits.insert(.notEnabled)
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}
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}
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open func reset() {
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backgroundColor = .clear
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surface = .light
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isEnabled = true
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}
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//--------------------------------------------------
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// MARK: - Overrides
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//--------------------------------------------------
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/// Implement accessibilityActivate on an element in order to handle the default action.
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/// - Returns: Based on whether the userInteraction is enabled.
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override open func accessibilityActivate() -> Bool {
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// Hold state in case User wanted isAnimated to remain off.
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guard isUserInteractionEnabled else { return false }
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sendActions(for: .touchUpInside)
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return true
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}
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}
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