NetNewsWire/iOS/Feeds/Cell/FeedTableViewCell.swift

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//
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// TableViewCell.swift
// NetNewsWire
//
// Created by Brent Simmons on 8/1/15.
// Copyright © 2015 Ranchero Software, LLC. All rights reserved.
//
import UIKit
import Account
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import Tree
import Images
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protocol FeedTableViewCellDelegate: AnyObject {
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@MainActor func feedTableViewCellDisclosureDidToggle(_ sender: FeedTableViewCell, expanding: Bool)
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}
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class FeedTableViewCell : VibrantTableViewCell {
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weak var delegate: FeedTableViewCellDelegate?
override var accessibilityLabel: String? {
set {}
get {
if unreadCount > 0 {
let unreadLabel = NSLocalizedString("unread", comment: "Unread label for accessiblity")
return "\(name) \(unreadCount) \(unreadLabel)"
} else {
return name
}
}
}
var iconImage: IconImage? {
didSet {
iconView.iconImage = iconImage
}
}
var isDisclosureAvailable = false {
didSet {
if isDisclosureAvailable != oldValue {
setNeedsLayout()
}
}
}
var isSeparatorShown = true {
didSet {
if isSeparatorShown != oldValue {
if isSeparatorShown {
showView(bottomSeparatorView)
} else {
hideView(bottomSeparatorView)
}
}
}
}
var unreadCount: Int {
get {
return unreadCountView.unreadCount
}
set {
if unreadCountView.unreadCount != newValue {
unreadCountView.unreadCount = newValue
unreadCountView.isHidden = (newValue < 1)
setNeedsLayout()
}
}
}
var name: String {
get {
return titleView.text ?? ""
}
set {
if titleView.text != newValue {
titleView.text = newValue
setNeedsLayout()
}
}
}
private let titleView: UILabel = {
let label = NonIntrinsicLabel()
label.numberOfLines = 0
label.allowsDefaultTighteningForTruncation = false
label.adjustsFontForContentSizeCategory = true
label.lineBreakMode = .byTruncatingTail
label.font = .preferredFont(forTextStyle: .body)
return label
}()
private let iconView = IconView()
private let bottomSeparatorView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.separator
view.alpha = 0.5
return view
}()
private var isDisclosureExpanded = false
private var disclosureButton: UIButton?
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private var unreadCountView = FeedUnreadCountView(frame: CGRect.zero)
private var isShowingEditControl = false
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
func setDisclosure(isExpanded: Bool, animated: Bool) {
isDisclosureExpanded = isExpanded
let duration = animated ? 0.3 : 0.0
UIView.animate(withDuration: duration) {
if self.isDisclosureExpanded {
self.disclosureButton?.accessibilityLabel = NSLocalizedString("Collapse Folder", comment: "Collapse Folder")
self.disclosureButton?.imageView?.transform = CGAffineTransform(rotationAngle: 1.570796)
} else {
self.disclosureButton?.accessibilityLabel = NSLocalizedString("Expand Folder", comment: "Expand Folder")
self.disclosureButton?.imageView?.transform = CGAffineTransform(rotationAngle: 0)
}
}
}
override func applyThemeProperties() {
super.applyThemeProperties()
}
override func willTransition(to state: UITableViewCell.StateMask) {
super.willTransition(to: state)
isShowingEditControl = state.contains(.showingEditControl)
}
override func sizeThatFits(_ size: CGSize) -> CGSize {
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let layout = FeedTableViewCellLayout(cellWidth: bounds.size.width, insets: safeAreaInsets, label: titleView, unreadCountView: unreadCountView, showingEditingControl: isShowingEditControl, indent: indentationLevel == 1, shouldShowDisclosure: isDisclosureAvailable)
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return CGSize(width: bounds.width, height: layout.height)
}
override func layoutSubviews() {
super.layoutSubviews()
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let layout = FeedTableViewCellLayout(cellWidth: bounds.size.width, insets: safeAreaInsets, label: titleView, unreadCountView: unreadCountView, showingEditingControl: isShowingEditControl, indent: indentationLevel == 1, shouldShowDisclosure: isDisclosureAvailable)
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layoutWith(layout)
}
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@objc func buttonPressed(_ sender: UIButton) {
if isDisclosureAvailable {
setDisclosure(isExpanded: !isDisclosureExpanded, animated: true)
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delegate?.feedTableViewCellDisclosureDidToggle(self, expanding: isDisclosureExpanded)
}
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}
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override func updateVibrancy(animated: Bool) {
super.updateVibrancy(animated: animated)
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let iconTintColor: UIColor
if isHighlighted || isSelected {
iconTintColor = AppAssets.vibrantTextColor
} else {
if let preferredColor = iconImage?.preferredColor {
iconTintColor = UIColor(cgColor: preferredColor)
} else {
iconTintColor = AppAssets.secondaryAccentColor
}
}
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if animated {
UIView.animate(withDuration: Self.duration) {
self.iconView.tintColor = iconTintColor
}
} else {
self.iconView.tintColor = iconTintColor
}
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updateLabelVibrancy(titleView, color: labelColor, animated: animated)
}
}
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private extension FeedTableViewCell {
func commonInit() {
addSubviewAtInit(unreadCountView)
addSubviewAtInit(iconView)
addSubviewAtInit(titleView)
addDisclosureView()
addSubviewAtInit(bottomSeparatorView)
}
func addDisclosureView() {
disclosureButton = NonIntrinsicButton(type: .roundedRect)
disclosureButton!.addTarget(self, action: #selector(buttonPressed(_:)), for: UIControl.Event.touchUpInside)
disclosureButton?.setImage(AppAssets.disclosureImage, for: .normal)
disclosureButton?.tintColor = AppAssets.controlBackgroundColor
disclosureButton?.imageView?.contentMode = .center
disclosureButton?.imageView?.clipsToBounds = false
disclosureButton?.addInteraction(UIPointerInteraction())
addSubviewAtInit(disclosureButton!)
}
func addSubviewAtInit(_ view: UIView) {
addSubview(view)
view.translatesAutoresizingMaskIntoConstraints = false
}
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func layoutWith(_ layout: FeedTableViewCellLayout) {
iconView.setFrameIfNotEqual(layout.faviconRect)
titleView.setFrameIfNotEqual(layout.titleRect)
unreadCountView.setFrameIfNotEqual(layout.unreadCountRect)
disclosureButton?.setFrameIfNotEqual(layout.disclosureButtonRect)
disclosureButton?.isHidden = !isDisclosureAvailable
bottomSeparatorView.setFrameIfNotEqual(layout.separatorRect)
}
func hideView(_ view: UIView) {
if !view.isHidden {
view.isHidden = true
}
}
func showView(_ view: UIView) {
if view.isHidden {
view.isHidden = false
}
}
}