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//
// LinkButton.swift
// MullvadVPN
//
// Created by Jon Petersson on 2023-12-20.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import UIKit
/// A subclass that implements the button that visually look like URL links on the web
class LinkButton: CustomButton {
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
var titleString: String? {
didSet {
updateAttributedTitle(string: titleString)
}
}
private func commonInit() {
imageAlignment = .trailing
contentHorizontalAlignment = .leading
configuration?.contentInsets = .zero
accessibilityTraits.insert(.link)
}
private func updateAttributedTitle(string: String?) {
let states: [UIControl.State] = [.normal, .highlighted, .disabled]
states.forEach { state in
let attributedTitle = string.flatMap { makeAttributedTitle($0, for: state) }
self.setAttributedTitle(attributedTitle, for: state)
}
}
private func makeAttributedTitle(
_ title: String,
for state: UIControl.State
) -> NSAttributedString {
var attributes: [NSAttributedString.Key: Any] = [
.underlineStyle: NSUnderlineStyle.single.rawValue
]
if let titleColor = state.customButtonTitleColor {
attributes[.foregroundColor] = titleColor
}
return NSAttributedString(string: title, attributes: attributes)
}
}
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