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136 lines
3.5 KiB
Swift
136 lines
3.5 KiB
Swift
//
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// TouchesVisibleWindow.swift
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//
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//
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// Created by Chase Carroll on 12/5/22.
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//
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#if DEBUG
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import UIKit
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/// View that represents a single touch from the user.
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private final class TouchView: UIView {
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private let blurView = UIVisualEffectView(effect: nil)
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override var frame: CGRect {
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didSet {
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layer.cornerRadius = frame.height / 2.0
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}
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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let isLightMode = traitCollection.userInterfaceStyle == .light
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backgroundColor = .clear
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layer.masksToBounds = true
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layer.cornerCurve = .circular
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layer.borderColor = isLightMode ? UIColor.gray.cgColor : UIColor.white.cgColor
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layer.borderWidth = 2.0
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let blurEffect = isLightMode ?
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UIBlurEffect(style: .systemUltraThinMaterialDark) :
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UIBlurEffect(style: .systemUltraThinMaterialLight)
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blurView.effect = blurEffect
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addSubview(blurView)
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}
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@available(iOS, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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blurView.frame = bounds
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}
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}
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/// `UIWindow` subclass that renders visual representations of the user's touches.
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public final class TouchesVisibleWindow: UIWindow {
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public var touchesVisible = false {
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didSet {
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if !touchesVisible {
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cleanUpAllTouches()
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}
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}
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}
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private var touchViews: [UITouch : TouchView] = [:]
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private func newTouchView() -> TouchView {
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let touchSize = 44.0
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return TouchView(frame: CGRect(
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origin: .zero,
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size: CGSize(
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width: touchSize,
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height: touchSize
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)
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))
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}
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private func cleanupTouch(_ touch: UITouch) {
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guard let touchView = touchViews[touch] else {
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return
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}
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touchView.removeFromSuperview()
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touchViews.removeValue(forKey: touch)
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}
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private func cleanUpAllTouches() {
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for (_, touchView) in touchViews {
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touchView.removeFromSuperview()
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}
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touchViews.removeAll()
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}
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public override func sendEvent(_ event: UIEvent) {
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if touchesVisible {
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let touches = event.allTouches
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guard
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let touches = touches,
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touches.count > 0
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else {
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cleanUpAllTouches()
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super.sendEvent(event)
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return
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}
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for touch in touches {
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let touchLocation = touch.location(in: self)
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switch touch.phase {
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case .began:
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let touchView = newTouchView()
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touchView.center = touchLocation
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addSubview(touchView)
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touchViews[touch] = touchView
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case .moved:
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if let touchView = touchViews[touch] {
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touchView.center = touchLocation
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}
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case .ended, .cancelled:
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cleanupTouch(touch)
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default:
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break
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}
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}
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}
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super.sendEvent(event)
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}
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}
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#endif
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