deltachat-ios/deltachat-ios/View/ChatTitleView.swift

import UIKit

class ChatTitleView: UIView {

    private var titleLabel: UILabel = {
        let titleLabel = UILabel()
        titleLabel.backgroundColor = UIColor.clear
        titleLabel.font = UIFont.systemFont(ofSize: 16, weight: .semibold)
        titleLabel.textAlignment = .center
        titleLabel.adjustsFontSizeToFitWidth = true
        return titleLabel
    }()

    private var subtitleLabel: UILabel = {
        let subtitleLabel = UILabel()
        subtitleLabel.font = UIFont.systemFont(ofSize: 12)
        subtitleLabel.textAlignment = .center
        return subtitleLabel
    }()

    init() {
        super.init(frame: .zero)
        setupSubviews()
        isAccessibilityElement = true
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    private func setupSubviews() {
        addSubview(titleLabel)
        titleLabel.translatesAutoresizingMaskIntoConstraints = false
        titleLabel.centerXAnchor.constraint(equalTo: centerXAnchor).isActive = true
        titleLabel.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
        titleLabel.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
        titleLabel.topAnchor.constraint(equalTo: topAnchor).isActive = true

        addSubview(subtitleLabel)
        subtitleLabel.translatesAutoresizingMaskIntoConstraints = false
        subtitleLabel.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 0).isActive = true
        subtitleLabel.topAnchor.constraint(equalTo: titleLabel.bottomAnchor, constant: 0).isActive = true
        subtitleLabel.trailingAnchor.constraint(equalTo: trailingAnchor, constant: 0).isActive = true
        subtitleLabel.bottomAnchor.constraint(equalTo: bottomAnchor, constant: 0).isActive = true
    }

    func updateTitleView(title: String, subtitle: String?, baseColor: UIColor = DcColors.defaultTextColor) {
        subtitleLabel.textColor = baseColor.withAlphaComponent(0.95)
        titleLabel.textColor = baseColor
        titleLabel.text = title
        subtitleLabel.text = subtitle
    }
}