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// SPDX-License-Identifier: MIT
// Copyright © 2018-2021 WireGuard LLC. All Rights Reserved.
import UIKit
class TunnelListCell: UITableViewCell {
var tunnel: TunnelContainer? {
didSet {
// Bind to the tunnel's name
nameLabel.text = tunnel?.name ?? ""
nameObservationToken = tunnel?.observe(\.name) { [weak self] tunnel, _ in
self?.nameLabel.text = tunnel.name
}
// Bind to the tunnel's status
update(from: tunnel, animated: false)
statusObservationToken = tunnel?.observe(\.status) { [weak self] tunnel, _ in
self?.update(from: tunnel, animated: true)
}
// Bind to tunnel's on-demand settings
isOnDemandEnabledObservationToken = tunnel?.observe(\.isActivateOnDemandEnabled) { [weak self] tunnel, _ in
self?.update(from: tunnel, animated: true)
}
hasOnDemandRulesObservationToken = tunnel?.observe(\.hasOnDemandRules) { [weak self] tunnel, _ in
self?.update(from: tunnel, animated: true)
}
}
}
var onSwitchToggled: ((Bool) -> Void)?
let nameLabel: UILabel = {
let nameLabel = UILabel()
nameLabel.font = UIFont.preferredFont(forTextStyle: .body)
nameLabel.adjustsFontForContentSizeCategory = true
nameLabel.numberOfLines = 0
return nameLabel
}()
let busyIndicator: UIActivityIndicatorView = {
let busyIndicator: UIActivityIndicatorView
if #available(iOS 13.0, *) {
busyIndicator = UIActivityIndicatorView(style: .medium)
} else {
busyIndicator = UIActivityIndicatorView(style: .gray)
}
busyIndicator.hidesWhenStopped = true
return busyIndicator
}()
let statusSwitch = UISwitch()
private var nameObservationToken: NSKeyValueObservation?
private var statusObservationToken: NSKeyValueObservation?
private var isOnDemandEnabledObservationToken: NSKeyValueObservation?
private var hasOnDemandRulesObservationToken: NSKeyValueObservation?
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
accessoryType = .disclosureIndicator
for subview in [statusSwitch, busyIndicator, nameLabel] {
subview.translatesAutoresizingMaskIntoConstraints = false
contentView.addSubview(subview)
}
nameLabel.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
let nameLabelBottomConstraint =
contentView.layoutMarginsGuide.bottomAnchor.constraint(equalToSystemSpacingBelow: nameLabel.bottomAnchor, multiplier: 1)
nameLabelBottomConstraint.priority = .defaultLow
NSLayoutConstraint.activate([
statusSwitch.centerYAnchor.constraint(equalTo: contentView.centerYAnchor),
statusSwitch.trailingAnchor.constraint(equalTo: contentView.layoutMarginsGuide.trailingAnchor),
statusSwitch.leadingAnchor.constraint(equalToSystemSpacingAfter: busyIndicator.trailingAnchor, multiplier: 1),
nameLabel.topAnchor.constraint(equalToSystemSpacingBelow: contentView.layoutMarginsGuide.topAnchor, multiplier: 1),
nameLabelBottomConstraint,
nameLabel.leadingAnchor.constraint(equalToSystemSpacingAfter: contentView.layoutMarginsGuide.leadingAnchor, multiplier: 1),
busyIndicator.centerYAnchor.constraint(equalTo: contentView.centerYAnchor),
busyIndicator.leadingAnchor.constraint(equalToSystemSpacingAfter: nameLabel.trailingAnchor, multiplier: 1)
])
statusSwitch.addTarget(self, action: #selector(switchToggled), for: .valueChanged)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func prepareForReuse() {
super.prepareForReuse()
reset(animated: false)
}
override func setEditing(_ editing: Bool, animated: Bool) {
super.setEditing(editing, animated: animated)
statusSwitch.isEnabled = !editing
}
@objc private func switchToggled() {
onSwitchToggled?(statusSwitch.isOn)
}
private func update(from tunnel: TunnelContainer?, animated: Bool) {
guard let tunnel = tunnel else {
reset(animated: animated)
return
}
let status = tunnel.status
let isOnDemandEngaged = tunnel.isActivateOnDemandEnabled
let isSwitchOn = (status == .activating || status == .active || isOnDemandEngaged)
statusSwitch.setOn(isSwitchOn, animated: true)
if isOnDemandEngaged && !(status == .activating || status == .active) {
statusSwitch.onTintColor = UIColor.systemYellow
} else {
statusSwitch.onTintColor = UIColor.systemGreen
}
if tunnel.hasOnDemandRules {
statusSwitch.isUserInteractionEnabled = true
} else {
statusSwitch.isUserInteractionEnabled = (status == .inactive || status == .active)
}
if status == .inactive || status == .active {
busyIndicator.stopAnimating()
} else {
busyIndicator.startAnimating()
}
}
private func reset(animated: Bool) {
statusSwitch.setOn(false, animated: animated)
statusSwitch.isUserInteractionEnabled = false
busyIndicator.stopAnimating()
}
}
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