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//
// SettingsDNSTextCell.swift
// MullvadVPN
//
// Created by pronebird on 05/10/2021.
// Copyright © 2021 Mullvad VPN AB. All rights reserved.
//
import Foundation
import UIKit
class SettingsDNSTextCell: SettingsCell, UITextFieldDelegate {
var isValidInput: Bool = true {
didSet {
updateCellAppearance(animated: false)
}
}
let textField = CustomTextField()
var onTextChange: ((SettingsDNSTextCell) -> Void)?
var onReturnKey: ((SettingsDNSTextCell) -> Void)?
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
textField.translatesAutoresizingMaskIntoConstraints = false
textField.font = UIFont.systemFont(ofSize: 17)
textField.backgroundColor = .clear
textField.textColor = UIColor.TextField.textColor
textField.textMargins = UIMetrics.settingsCellLayoutMargins
textField.placeholder = NSLocalizedString("DNS_TEXT_CELL_PLACEHOLDER", tableName: "Settings", value: "Enter IP", comment: "")
textField.cornerRadius = 0
textField.keyboardType = .numbersAndPunctuation
textField.returnKeyType = .done
textField.autocorrectionType = .no
textField.smartInsertDeleteType = .no
textField.smartDashesType = .no
textField.smartQuotesType = .no
textField.spellCheckingType = .no
textField.autocapitalizationType = .none
textField.delegate = self
NotificationCenter.default.addObserver(
self,
selector: #selector(textDidChange),
name: UITextField.textDidChangeNotification,
object: textField
)
backgroundView?.backgroundColor = UIColor.TextField.backgroundColor
contentView.addSubview(textField)
if #available(iOS 13.0, *) {
overrideUserInterfaceStyle = .light
}
NSLayoutConstraint.activate([
textField.topAnchor.constraint(equalTo: contentView.topAnchor),
textField.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
textField.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
textField.bottomAnchor.constraint(equalTo: contentView.bottomAnchor)
])
updateCellAppearance(animated: false)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func prepareForReuse() {
super.prepareForReuse()
onTextChange = nil
onReturnKey = nil
textField.text = ""
isValidInput = true
}
override func setEditing(_ editing: Bool, animated: Bool) {
super.setEditing(editing, animated: animated)
updateCellAppearance(animated: animated)
}
@objc func textDidChange() {
onTextChange?(self)
}
private func updateCellAppearance(animated: Bool) {
if animated {
UIView.animate(withDuration: 0.25) {
self.updateCellAppearance()
}
} else {
updateCellAppearance()
}
}
private func updateCellAppearance() {
textField.isEnabled = isEditing
if isEditing {
if isValidInput {
textField.textColor = UIColor.TextField.textColor
} else {
textField.textColor = UIColor.TextField.invalidInputTextColor
}
backgroundView?.backgroundColor = UIColor.TextField.backgroundColor
} else {
textField.textColor = .white
backgroundView?.backgroundColor = UIColor.SubCell.backgroundColor
}
}
// MARK: - UITextFieldDelegate
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
onReturnKey?(self)
return true
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
let ipv4AddressCharset = CharacterSet.ipv4AddressCharset
let ipv6AddressCharset = CharacterSet.ipv6AddressCharset
return [ipv4AddressCharset, ipv6AddressCharset].contains { charset in
return string.unicodeScalars.allSatisfy { scalar in
return charset.contains(scalar)
}
}
}
}
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