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mastodon-app-ufficiale-ipho.../MastodonSDK/Sources/MastodonUI/View/Window/TouchesVisibleWindow.swift
2022-12-07 07:20:08 -05:00

136 lines
3.5 KiB
Swift

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