NetNewsWire/iOS/MasterFeed/Cell/MasterFeedTableViewSectionH...

209 lines
5.5 KiB
Swift

//
// MasterTableViewSectionHeader.swift
// NetNewsWire
//
// Created by Maurice Parker on 4/18/19.
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import UIKit
protocol MasterFeedTableViewSectionHeaderDelegate {
func masterFeedTableViewSectionHeaderDisclosureDidToggle(_ sender: MasterFeedTableViewSectionHeader)
}
class MasterFeedTableViewSectionHeader: UITableViewHeaderFooterView {
var delegate: MasterFeedTableViewSectionHeaderDelegate?
override var accessibilityLabel: String? {
set {}
get {
if unreadCount > 0 {
let unreadLabel = NSLocalizedString("unread", comment: "Unread label for accessiblity")
return "\(name) \(unreadCount) \(unreadLabel) \(expandedStateMessage) "
} else {
return "\(name) \(expandedStateMessage) "
}
}
}
private var expandedStateMessage: String {
set {}
get {
if disclosureExpanded {
return NSLocalizedString("Expanded", comment: "Disclosure button expanded state for accessibility")
}
return NSLocalizedString("Collapsed", comment: "Disclosure button collapsed state for accessibility")
}
}
var unreadCount: Int {
get {
return unreadCountView.unreadCount
}
set {
if unreadCountView.unreadCount != newValue {
unreadCountView.unreadCount = newValue
updateUnreadCountView()
setNeedsLayout()
}
}
}
var name: String {
get {
return titleView.text ?? ""
}
set {
if titleView.text != newValue {
titleView.text = newValue
setNeedsLayout()
}
}
}
var disclosureExpanded = false {
didSet {
updateExpandedState(animate: true)
updateUnreadCountView()
}
}
var isLastSection = false
private let titleView: UILabel = {
let label = NonIntrinsicLabel()
label.numberOfLines = 0
label.allowsDefaultTighteningForTruncation = false
label.adjustsFontForContentSizeCategory = true
label.font = .preferredFont(forTextStyle: .body)
return label
}()
private let unreadCountView = MasterFeedUnreadCountView(frame: CGRect.zero)
private lazy var disclosureButton: UIButton = {
let button = NonIntrinsicButton()
button.tintColor = UIColor.tertiaryLabel
button.setImage(AppAssets.disclosureImage, for: .normal)
button.contentMode = .center
if #available(iOS 13.4, *) {
button.addInteraction(UIPointerInteraction())
}
button.addTarget(self, action: #selector(toggleDisclosure), for: .touchUpInside)
return button
}()
private let topSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.separator
return view
}()
private let bottomSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.separator
return view
}()
override init(reuseIdentifier: String?) {
super.init(reuseIdentifier: reuseIdentifier)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
override func sizeThatFits(_ size: CGSize) -> CGSize {
let layout = MasterFeedTableViewSectionHeaderLayout(cellWidth: size.width, insets: safeAreaInsets, label: titleView, unreadCountView: unreadCountView)
return CGSize(width: bounds.width, height: layout.height)
}
override func layoutSubviews() {
super.layoutSubviews()
let layout = MasterFeedTableViewSectionHeaderLayout(cellWidth: contentView.bounds.size.width,
insets: contentView.safeAreaInsets,
label: titleView,
unreadCountView: unreadCountView)
layoutWith(layout)
}
}
private extension MasterFeedTableViewSectionHeader {
@objc func toggleDisclosure() {
delegate?.masterFeedTableViewSectionHeaderDisclosureDidToggle(self)
}
func commonInit() {
addSubviewAtInit(unreadCountView)
addSubviewAtInit(titleView)
addSubviewAtInit(disclosureButton)
updateExpandedState(animate: false)
addBackgroundView()
addSubviewAtInit(topSeparatorView)
addSubviewAtInit(bottomSeparatorView)
}
func updateExpandedState(animate: Bool) {
if !isLastSection && self.disclosureExpanded {
self.bottomSeparatorView.isHidden = false
}
let duration = animate ? 0.3 : 0.0
UIView.animate(
withDuration: duration,
animations: {
if self.disclosureExpanded {
self.disclosureButton.transform = CGAffineTransform(rotationAngle: 1.570796)
} else {
self.disclosureButton.transform = CGAffineTransform(rotationAngle: 0)
}
}, completion: { _ in
if !self.isLastSection && !self.disclosureExpanded {
self.bottomSeparatorView.isHidden = true
}
})
}
func updateUnreadCountView() {
if !disclosureExpanded && unreadCount > 0 {
UIView.animate(withDuration: 0.3) {
self.unreadCountView.alpha = 1
}
} else {
UIView.animate(withDuration: 0.3) {
self.unreadCountView.alpha = 0
}
}
}
func addSubviewAtInit(_ view: UIView) {
contentView.addSubview(view)
view.translatesAutoresizingMaskIntoConstraints = false
}
func layoutWith(_ layout: MasterFeedTableViewSectionHeaderLayout) {
titleView.setFrameIfNotEqual(layout.titleRect)
unreadCountView.setFrameIfNotEqual(layout.unreadCountRect)
disclosureButton.setFrameIfNotEqual(layout.disclosureButtonRect)
let top = CGRect(x: safeAreaInsets.left, y: 0, width: frame.width - safeAreaInsets.right - safeAreaInsets.left, height: 0.33)
topSeparatorView.setFrameIfNotEqual(top)
let bottom = CGRect(x: safeAreaInsets.left, y: frame.height - 0.33, width: frame.width - safeAreaInsets.right - safeAreaInsets.left, height: 0.33)
bottomSeparatorView.setFrameIfNotEqual(bottom)
}
func addBackgroundView() {
self.backgroundView = UIView(frame: self.bounds)
self.backgroundView?.backgroundColor = AppAssets.sectionHeaderColor
}
}