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

167 lines
4.5 KiB
Swift

//
// MasterTableViewSectionHeader.swift
// NetNewsWire
//
// Created by Maurice Parker on 4/18/19.
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import UIKit
class MasterFeedTableViewSectionHeader: UITableViewHeaderFooterView {
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 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
setNeedsDisplay()
setNeedsLayout()
}
}
}
var disclosureExpanded = false {
didSet {
updateDisclosureImage()
}
}
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 var disclosureView: UIImageView = {
let iView = NonIntrinsicImageView()
iView.tintColor = UIColor.tertiaryLabel
iView.image = AppAssets.chevronSmallImage
iView.contentMode = .center
return iView
}()
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 unreadCountView = MasterFeedUnreadCountView(frame: CGRect.zero)
// Since we can't reload Section Headers to reset the height after we get the
// unread count did change, we always assume a large unread count
//
// This means that sometimes on the second to largest font size will have extra
// space under the account name. This is better than having it overflow into the
// cell below.
unreadCountView.unreadCount = 888
let layout = MasterFeedTableViewCellLayout(cellWidth: size.width, insets: safeAreaInsets, label: titleView, unreadCountView: unreadCountView, showingEditingControl: false, indent: false, shouldShowDisclosure: true)
return CGSize(width: bounds.width, height: layout.height)
}
override func layoutSubviews() {
super.layoutSubviews()
let layout = MasterFeedTableViewCellLayout(cellWidth: bounds.size.width, insets: safeAreaInsets, label: titleView, unreadCountView: unreadCountView, showingEditingControl: false, indent: false, shouldShowDisclosure: true)
layoutWith(layout)
}
}
private extension MasterFeedTableViewSectionHeader {
func commonInit() {
addSubviewAtInit(unreadCountView)
addSubviewAtInit(titleView)
updateDisclosureImage()
addSubviewAtInit(disclosureView)
addBackgroundView()
addSubviewAtInit(topSeparatorView)
addSubviewAtInit(bottomSeparatorView)
}
func updateDisclosureImage() {
UIView.animate(withDuration: 0.3) {
if self.disclosureExpanded {
self.disclosureView.transform = CGAffineTransform(rotationAngle: 1.570796)
} else {
self.disclosureView.transform = CGAffineTransform(rotationAngle: 0)
}
}
}
func addSubviewAtInit(_ view: UIView) {
addSubview(view)
view.translatesAutoresizingMaskIntoConstraints = false
}
func layoutWith(_ layout: MasterFeedTableViewCellLayout) {
titleView.setFrameIfNotEqual(layout.titleRect)
unreadCountView.setFrameIfNotEqual(layout.unreadCountRect)
disclosureView.setFrameIfNotEqual(layout.disclosureButtonRect)
let top = CGRect(x: safeAreaInsets.left, y: 0, width: frame.width - safeAreaInsets.right - safeAreaInsets.left, height: 0.5)
topSeparatorView.setFrameIfNotEqual(top)
let bottom = CGRect(x: safeAreaInsets.left, y: frame.height - 0.5, width: frame.width - safeAreaInsets.right - safeAreaInsets.left, height: 0.5)
bottomSeparatorView.setFrameIfNotEqual(bottom)
}
func addBackgroundView() {
self.backgroundView = UIView(frame: self.bounds)
self.backgroundView?.backgroundColor = UIColor.systemGroupedBackground
}
}