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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 UIKit
import Common
public final class NavigationHeaderView: UIView {
private struct UX {
static let closeButtonSize: CGFloat = 30
static let imageMargins: CGFloat = 10
static let baseDistance: CGFloat = 20
static let horizontalMargin: CGFloat = 16
static let separatorHeight: CGFloat = 1
static let largeFaviconImageSize: CGFloat = 48
}
public var backToMainMenuCallback: (() -> Void)?
public var dismissMenuCallback: (() -> Void)?
let titleLabel: UILabel = .build { label in
label.adjustsFontForContentSizeCategory = true
label.textAlignment = .center
label.font = FXFontStyles.Regular.headline.scaledFont()
label.numberOfLines = 2
label.accessibilityTraits.insert(.header)
label.isAccessibilityElement = false
}
private lazy var closeButton: CloseButton = .build { button in
button.addTarget(self, action: #selector(self.dismissMenuTapped), for: .touchUpInside)
}
private lazy var backButton: UIButton = .build { button in
button.setImage(UIImage(imageLiteralResourceName: StandardImageIdentifiers.Large.chevronLeft)
.withRenderingMode(.alwaysTemplate),
for: .normal)
button.titleLabel?.adjustsFontSizeToFitWidth = true
button.addTarget(self, action: #selector(self.backButtonTapped), for: .touchUpInside)
}
private let horizontalLine: UIView = .build()
private var viewConstraints: [NSLayoutConstraint] = []
override init(frame: CGRect) {
super.init(frame: frame)
setupViews()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func setupViews() {
addSubviews(titleLabel, backButton, closeButton, horizontalLine)
}
// MARK: View Setup
private func updateLayout(isAccessibilityCategory: Bool) {
removeConstraints(constraints)
closeButton.removeConstraints(closeButton.constraints)
viewConstraints.removeAll()
viewConstraints.append(contentsOf: [
backButton.leadingAnchor.constraint(
equalTo: leadingAnchor,
constant: UX.imageMargins
),
backButton.centerYAnchor.constraint(equalTo: centerYAnchor),
titleLabel.topAnchor.constraint(
equalTo: topAnchor,
constant: UX.baseDistance
),
titleLabel.bottomAnchor.constraint(
equalTo: bottomAnchor,
constant: -UX.baseDistance
),
titleLabel.centerXAnchor.constraint(equalTo: centerXAnchor),
closeButton.trailingAnchor.constraint(
equalTo: trailingAnchor,
constant: -UX.horizontalMargin
),
closeButton.centerYAnchor.constraint(equalTo: centerYAnchor),
horizontalLine.leadingAnchor.constraint(equalTo: leadingAnchor),
horizontalLine.trailingAnchor.constraint(equalTo: trailingAnchor),
horizontalLine.bottomAnchor.constraint(equalTo: bottomAnchor),
horizontalLine.heightAnchor.constraint(equalToConstant: UX.separatorHeight)
])
let closeButtonSizes = isAccessibilityCategory ? UX.largeFaviconImageSize : UX.closeButtonSize
viewConstraints.append(closeButton.heightAnchor.constraint(equalToConstant: closeButtonSizes))
viewConstraints.append(closeButton.widthAnchor.constraint(equalToConstant: closeButtonSizes))
closeButton.layer.cornerRadius = 0.5 * closeButtonSizes
NSLayoutConstraint.activate(viewConstraints)
}
public func setupAccessibility(closeButtonA11yLabel: String,
closeButtonA11yId: String,
backButtonA11yLabel: String,
backButtonA11yId: String) {
let closeButtonViewModel = CloseButtonViewModel(a11yLabel: closeButtonA11yLabel,
a11yIdentifier: closeButtonA11yId)
closeButton.configure(viewModel: closeButtonViewModel)
backButton.accessibilityIdentifier = backButtonA11yId
backButton.accessibilityLabel = backButtonA11yLabel
}
public func setViews(with title: String, and backButtonText: String) {
titleLabel.text = title
backButton.setTitle(backButtonText, for: .normal)
}
public func adjustLayout() {
backButton.titleLabel?.font = FXFontStyles.Regular.body.scaledFont()
updateLayout(isAccessibilityCategory: UIApplication.shared.preferredContentSizeCategory.isAccessibilityCategory)
}
public func updateHeaderLineView(isHidden: Bool) {
if (isHidden && !horizontalLine.isHidden) || (!isHidden && horizontalLine.isHidden) {
UIView.animate(withDuration: 0.3) { [weak self] in
self?.horizontalLine.isHidden = isHidden
}
}
}
@objc
private func backButtonTapped() {
backToMainMenuCallback?()
}
@objc
private func dismissMenuTapped() {
dismissMenuCallback?()
}
// MARK: ThemeApplicable
public func applyTheme(theme: Theme) {
let buttonImage = UIImage(named: StandardImageIdentifiers.Medium.cross)?
.withTintColor(theme.colors.iconSecondary)
closeButton.setImage(buttonImage, for: .normal)
closeButton.backgroundColor = theme.colors.layer2
backButton.tintColor = theme.colors.iconAction
backButton.setTitleColor(theme.colors.textAccent, for: .normal)
horizontalLine.backgroundColor = theme.colors.borderPrimary
titleLabel.textColor = theme.colors.textPrimary
}
}