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// SPDX-License-Identifier: MIT
// Copyright © 2018 WireGuard LLC. All Rights Reserved.
import UIKit
class EditableKeyValueCell: UITableViewCell {
var key: String {
get { return keyLabel.text ?? "" }
set(value) { keyLabel.text = value }
}
var value: String {
get { return valueTextField.text ?? "" }
set(value) { valueTextField.text = value }
}
var placeholderText: String {
get { return valueTextField.placeholder ?? "" }
set(value) { valueTextField.placeholder = value }
}
var isValueValid = true {
didSet {
if isValueValid {
keyLabel.textColor = .black
} else {
keyLabel.textColor = .red
}
}
}
var keyboardType: UIKeyboardType {
get { return valueTextField.keyboardType }
set(value) { valueTextField.keyboardType = value }
}
var onValueChanged: ((String) -> Void)?
var onValueBeingEdited: ((String) -> Void)?
let keyLabel: UILabel = {
let keyLabel = UILabel()
keyLabel.font = UIFont.preferredFont(forTextStyle: .body)
keyLabel.adjustsFontForContentSizeCategory = true
return keyLabel
}()
let valueTextField: UITextField = {
let valueTextField = UITextField()
valueTextField.font = UIFont.preferredFont(forTextStyle: .body)
valueTextField.adjustsFontForContentSizeCategory = true
valueTextField.autocapitalizationType = .none
valueTextField.autocorrectionType = .no
valueTextField.spellCheckingType = .no
return valueTextField
}()
var isStackedHorizontally = false
var isStackedVertically = false
var contentSizeBasedConstraints = [NSLayoutConstraint]()
private var textFieldValueOnBeginEditing: String = ""
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
contentView.addSubview(keyLabel)
keyLabel.translatesAutoresizingMaskIntoConstraints = false
keyLabel.textAlignment = .right
let widthRatioConstraint = NSLayoutConstraint(item: keyLabel, attribute: .width,
relatedBy: .equal,
toItem: self, attribute: .width,
multiplier: 0.4, constant: 0)
// The "Persistent Keepalive" key doesn't fit into 0.4 * width on the iPhone SE,
// so set a CR priority > the 0.4-constraint's priority.
widthRatioConstraint.priority = .defaultHigh + 1
keyLabel.setContentCompressionResistancePriority(.defaultHigh + 2, for: .horizontal)
NSLayoutConstraint.activate([
keyLabel.leftAnchor.constraint(equalTo: contentView.layoutMarginsGuide.leftAnchor),
keyLabel.topAnchor.constraint(equalToSystemSpacingBelow: contentView.layoutMarginsGuide.topAnchor, multiplier: 0.5),
widthRatioConstraint
])
contentView.addSubview(valueTextField)
valueTextField.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
valueTextField.rightAnchor.constraint(equalTo: contentView.layoutMarginsGuide.rightAnchor),
contentView.layoutMarginsGuide.bottomAnchor.constraint(equalToSystemSpacingBelow: valueTextField.bottomAnchor, multiplier: 0.5)
])
valueTextField.delegate = self
configureForContentSize()
}
func configureForContentSize() {
var constraints = [NSLayoutConstraint]()
if traitCollection.preferredContentSizeCategory.isAccessibilityCategory {
// Stack vertically
if !isStackedVertically {
constraints = [
valueTextField.topAnchor.constraint(equalToSystemSpacingBelow: keyLabel.bottomAnchor, multiplier: 0.5),
valueTextField.leftAnchor.constraint(equalTo: contentView.layoutMarginsGuide.leftAnchor),
keyLabel.rightAnchor.constraint(equalTo: contentView.layoutMarginsGuide.rightAnchor)
]
isStackedVertically = true
isStackedHorizontally = false
}
} else {
// Stack horizontally
if !isStackedHorizontally {
constraints = [
contentView.layoutMarginsGuide.bottomAnchor.constraint(equalToSystemSpacingBelow: keyLabel.bottomAnchor, multiplier: 0.5),
valueTextField.leftAnchor.constraint(equalToSystemSpacingAfter: keyLabel.rightAnchor, multiplier: 1),
valueTextField.topAnchor.constraint(equalToSystemSpacingBelow: contentView.layoutMarginsGuide.topAnchor, multiplier: 0.5)
]
isStackedHorizontally = true
isStackedVertically = false
}
}
if !constraints.isEmpty {
NSLayoutConstraint.deactivate(contentSizeBasedConstraints)
NSLayoutConstraint.activate(constraints)
contentSizeBasedConstraints = constraints
}
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func prepareForReuse() {
super.prepareForReuse()
key = ""
value = ""
placeholderText = ""
isValueValid = true
keyboardType = .default
onValueChanged = nil
onValueBeingEdited = nil
configureForContentSize()
}
}
extension EditableKeyValueCell: UITextFieldDelegate {
func textFieldDidBeginEditing(_ textField: UITextField) {
textFieldValueOnBeginEditing = textField.text ?? ""
isValueValid = true
}
func textFieldDidEndEditing(_ textField: UITextField) {
let isModified = (textField.text ?? "" != textFieldValueOnBeginEditing)
guard isModified else { return }
if let onValueChanged = onValueChanged {
onValueChanged(textField.text ?? "")
}
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if let onValueBeingEdited = onValueBeingEdited {
let modifiedText = ((textField.text ?? "") as NSString).replacingCharacters(in: range, with: string)
onValueBeingEdited(modifiedText)
}
return true
}
}
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