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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
import Foundation
import UIKit
import Common
struct ErrorViewModel {
let title: String
let titleA11yId: String
let actionButtonLabel: String
let actionButtonA11yId: String
let actionButtonCallback: () -> Void
}
class ErrorView: UIView,
ThemeApplicable {
private struct UX {
static let labelHorizontalPadding: CGFloat = 44.0
static let actionButtonTopPadding: CGFloat = 32.0
static let actionButtonInsets = NSDirectionalEdgeInsets(
top: 12.0,
leading: 32.0,
bottom: 12.0,
trailing: 32.0
)
}
private let label: UILabel = .build {
$0.adjustsFontForContentSizeCategory = true
$0.font = FXFontStyles.Regular.body.scaledFont()
$0.numberOfLines = 0
$0.textAlignment = .center
}
private let actionButton: UIButton = .build {
// This checks for Xcode 26 sdk availability thus we can compile on older Xcode version too
#if canImport(FoundationModels)
if #available(iOS 26, *) {
$0.configuration = .prominentClearGlass()
} else {
$0.configuration = .filled()
$0.configuration?.cornerStyle = .capsule
}
#else
$0.configuration = .filled()
$0.configuration?.cornerStyle = .capsule
#endif
$0.configuration?.contentInsets = UX.actionButtonInsets
}
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func setup() {
addSubviews(label, actionButton)
NSLayoutConstraint.activate([
label.topAnchor.constraint(equalTo: topAnchor),
label.leadingAnchor.constraint(equalTo: leadingAnchor, constant: UX.labelHorizontalPadding),
label.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -UX.labelHorizontalPadding),
actionButton.topAnchor.constraint(equalTo: label.bottomAnchor, constant: UX.actionButtonTopPadding),
actionButton.centerXAnchor.constraint(equalTo: centerXAnchor),
actionButton.leadingAnchor.constraint(greaterThanOrEqualTo: leadingAnchor),
actionButton.trailingAnchor.constraint(lessThanOrEqualTo: trailingAnchor),
actionButton.bottomAnchor.constraint(equalTo: bottomAnchor)
])
label.setContentCompressionResistancePriority(.defaultLow, for: .vertical)
actionButton.setContentCompressionResistancePriority(.required, for: .vertical)
}
func configure(viewModel: ErrorViewModel) {
label.text = viewModel.title
label.accessibilityIdentifier = viewModel.titleA11yId
actionButton.configuration?.title = viewModel.actionButtonLabel
actionButton.accessibilityIdentifier = viewModel.actionButtonA11yId
actionButton.addAction(UIAction(handler: { _ in
viewModel.actionButtonCallback()
}), for: .touchUpInside)
}
// MARK: - ThemeApplicable
func applyTheme(theme: any Theme) {
label.textColor = theme.colors.textOnDark
if #unavailable(iOS 26) {
actionButton.configuration?.baseBackgroundColor = theme.colors.actionTabActive
}
actionButton.configuration?.baseForegroundColor = theme.colors.textPrimary
}
}