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//
// SettingsCell.swift
// MullvadVPN
//
// Created by pronebird on 22/05/2019.
// Copyright © 2019 Mullvad VPN AB. All rights reserved.
//
import UIKit
class SettingsCell: UITableViewCell {
let titleLabel = UILabel()
let detailTitleLabel = UILabel()
lazy var customDisclosureIndicator: UIImageView = {
let disclosureImage = UIImage(named: "IconChevron")?
.backport_withTintColor(UIColor.Cell.disclosureIndicatorColor, renderingMode: .alwaysOriginal)
return UIImageView(image: disclosureImage)
}()
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
backgroundView = UIView()
backgroundView?.backgroundColor = UIColor.Cell.backgroundColor
selectedBackgroundView = UIView()
selectedBackgroundView?.backgroundColor = UIColor.Cell.selectedAltBackgroundColor
separatorInset = .zero
backgroundColor = .clear
contentView.backgroundColor = .clear
titleLabel.translatesAutoresizingMaskIntoConstraints = false
titleLabel.font = UIFont.systemFont(ofSize: 17)
titleLabel.textColor = UIColor.Cell.titleTextColor
detailTitleLabel.translatesAutoresizingMaskIntoConstraints = false
detailTitleLabel.font = UIFont.systemFont(ofSize: 13)
detailTitleLabel.textColor = UIColor.Cell.detailTextColor
titleLabel.setContentHuggingPriority(.defaultHigh, for: .horizontal)
detailTitleLabel.setContentHuggingPriority(.defaultLow, for: .horizontal)
titleLabel.setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
detailTitleLabel.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
contentView.addSubview(titleLabel)
contentView.addSubview(detailTitleLabel)
setLayoutMargins()
NSLayoutConstraint.activate([
titleLabel.leadingAnchor.constraint(equalTo: contentView.layoutMarginsGuide.leadingAnchor),
titleLabel.topAnchor.constraint(equalTo: contentView.layoutMarginsGuide.topAnchor),
titleLabel.bottomAnchor.constraint(equalTo: contentView.layoutMarginsGuide.bottomAnchor),
detailTitleLabel.leadingAnchor.constraint(greaterThanOrEqualToSystemSpacingAfter: titleLabel.trailingAnchor, multiplier: 1),
detailTitleLabel.trailingAnchor.constraint(equalTo: contentView.layoutMarginsGuide.trailingAnchor),
detailTitleLabel.topAnchor.constraint(equalTo: contentView.layoutMarginsGuide.topAnchor),
detailTitleLabel.bottomAnchor.constraint(equalTo: contentView.layoutMarginsGuide.bottomAnchor),
])
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func prepareForReuse() {
super.prepareForReuse()
setLayoutMargins()
}
override func layoutSubviews() {
super.layoutSubviews()
if #available(iOS 13, *) {
// no-op
} else {
layoutSubviews_iOS12()
}
}
private func setLayoutMargins() {
// Set layout margins for standard acceessories added into the cell (reorder control, etc..)
layoutMargins = UIMetrics.settingsCellLayoutMargins
// Set layout margins for cell content
contentView.layoutMargins = UIMetrics.settingsCellLayoutMargins
}
func setCustomDisclosureIndicator() {
accessoryType = .none
accessoryView = customDisclosureIndicator
}
func unsetCustomDisclosureIndicator() {
accessoryView = nil
accessoryType = .none
}
/// On iOS 12, standard edit and reorder controls do not respect layout margins.
/// This method does layout adjustments to fix that.
private func layoutSubviews_iOS12() {
guard isEditing || showsReorderControl else { return }
var leftOffset: CGFloat = 0
var rightOffset: CGFloat = 0
for subview in subviews {
// Detect the edit control and move it, so that the nested image view is aligned along the left edge of the
// layout margins.
if subview.description.starts(with: "<UITableViewCellEditControl"), let imageView = subview.subviews.first {
let imageOffset = imageView.frame.minX
var pos = subview.frame.origin
pos.x = layoutMargins.left - imageOffset
subview.frame.origin = pos
leftOffset = pos.x
}
// Detect the reorder control and move it, so that its right edge is aligned along the right edge of the
// layout margins.
if subview.description.starts(with: "<UITableViewCellReorderControl") {
var pos = subview.frame.origin
pos.x -= layoutMargins.right
subview.frame.origin = pos
rightOffset = layoutMargins.right
}
}
// Adjust the content view to account for the adjustments to the edit and reorder controls.
let contentInset = UIEdgeInsets(top: 0, left: leftOffset, bottom: 0, right: rightOffset)
contentView.frame = contentView.frame.inset(by: contentInset)
}
}
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