Rename MainFeed and MainTimeline folders to Sidebar and Timeline.

iOS/MainWindow/Sidebar/Cell/MainFeedTableViewSectionHeader.swift

@@ -0,0 +1,209 @@
+//
+//  MainFeedTableViewSectionHeader.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 4/18/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import UIKit
+
+protocol MainFeedTableViewSectionHeaderDelegate: AnyObject {
+	func mainFeedTableViewSectionHeaderDisclosureDidToggle(_ sender: MainFeedTableViewSectionHeader)
+}
+
+final class MainFeedTableViewSectionHeader: UITableViewHeaderFooterView {
+
+	weak var delegate: MainFeedTableViewSectionHeaderDelegate?
+
+	override var accessibilityLabel: String? {
+		get {
+			if unreadCount > 0 {
+				let unreadLabel = NSLocalizedString("unread", comment: "Unread label for accessibility")
+				return "\(name) \(unreadCount) \(unreadLabel) \(expandedStateMessage) "
+			} else {
+				return "\(name) \(expandedStateMessage) "
+			}
+		}
+		set {
+		}
+	}
+
+	private var expandedStateMessage: String {
+		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 = MainFeedUnreadCountView(frame: CGRect.zero)
+
+	private lazy var disclosureButton: UIButton = {
+		let button = NonIntrinsicButton()
+		button.tintColor = UIColor.tertiaryLabel
+		button.setImage(AppImage.disclosure, for: .normal)
+		button.contentMode = .center
+		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 = MainFeedTableViewSectionHeaderLayout(cellWidth: size.width, insets: safeAreaInsets, label: titleView, unreadCountView: unreadCountView)
+		return CGSize(width: bounds.width, height: layout.height)
+
+	}
+
+	override func layoutSubviews() {
+		super.layoutSubviews()
+		let layout = MainFeedTableViewSectionHeaderLayout(cellWidth: contentView.bounds.size.width,
+															insets: contentView.safeAreaInsets,
+															label: titleView,
+															unreadCountView: unreadCountView)
+		layoutWith(layout)
+	}
+
+}
+
+private extension MainFeedTableViewSectionHeader {
+
+	@objc func toggleDisclosure() {
+		delegate?.mainFeedTableViewSectionHeaderDisclosureDidToggle(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: MainFeedTableViewSectionHeaderLayout) {
+		titleView.setFrameIfNotEqual(layout.titleRect)
+		unreadCountView.setFrameIfNotEqual(layout.unreadCountRect)
+		disclosureButton.setFrameIfNotEqual(layout.disclosureButtonRect)
+
+		let x = -safeAreaInsets.left
+		let width = safeAreaInsets.left + safeAreaInsets.right + frame.width
+		let height = 0.33
+
+		let top = CGRect(x: x, y: 0, width: width, height: height)
+		topSeparatorView.setFrameIfNotEqual(top)
+
+		let bottom = CGRect(x: x, y: frame.height - height, width: width, height: height)
+		bottomSeparatorView.setFrameIfNotEqual(bottom)
+	}
+
+	func addBackgroundView() {
+		self.backgroundView = UIView(frame: self.bounds)
+		self.backgroundView?.backgroundColor = AppColor.sectionHeader
+	}
+
+}