Added optional separators in the timeline view.

The timeline now optionally includes "Mail style" separators (behind a
hidden default — "CorreiaSeparators" — which defaults to NO).

Mac/AppDefaults.swift

@@ -32,6 +32,7 @@ struct AppDefaults {
 		static let exportOPMLAccountID = "exportOPMLAccountID"
 
 		// Hidden prefs
+		static let timelineShowsSeparators = "CorreiaSeparators"
 		static let showTitleOnMainWindow = "KafasisTitleMode"
 		static let hideDockUnreadCount = "JustinMillerHideDockUnreadCount"
 	}
@@ -135,6 +136,10 @@ struct AppDefaults {
 			setSortDirection(for: Key.timelineSortDirection, newValue)
 		}
 	}
+	
+	static var timelineShowsSeparators: Bool {
+		return bool(for: Key.timelineShowsSeparators)
+	}
 
 	static var mainWindowWidths: [Int]? {
 		get {
@@ -268,4 +273,17 @@ private extension AppDefaults {
 	}
 }
 
+// MARK: -
+
+extension UserDefaults {
+	/// This property exists so that it can conveniently be observed via KVO
+	@objc var CorreiaSeparators: Bool {
+		get {
+			return bool(forKey: AppDefaults.Key.timelineShowsSeparators)
+		}
+		set {
+			set(newValue, forKey: AppDefaults.Key.timelineShowsSeparators)
+		}
+	}
+}
 

Mac/MainWindow/Timeline/Cell/TimelineCellLayout.swift

@@ -22,9 +22,10 @@ struct TimelineCellLayout {
 	let unreadIndicatorRect: NSRect
 	let starRect: NSRect
 	let avatarImageRect: NSRect
+	let separatorRect: NSRect
 	let paddingBottom: CGFloat
 	
-	init(width: CGFloat, height: CGFloat, feedNameRect: NSRect, dateRect: NSRect, titleRect: NSRect, numberOfLinesForTitle: Int, summaryRect: NSRect, textRect: NSRect, unreadIndicatorRect: NSRect, starRect: NSRect, avatarImageRect: NSRect, paddingBottom: CGFloat) {
+	init(width: CGFloat, height: CGFloat, feedNameRect: NSRect, dateRect: NSRect, titleRect: NSRect, numberOfLinesForTitle: Int, summaryRect: NSRect, textRect: NSRect, unreadIndicatorRect: NSRect, starRect: NSRect, avatarImageRect: NSRect, separatorRect: NSRect, paddingBottom: CGFloat) {
 		
 		self.width = width
 		self.feedNameRect = feedNameRect
@@ -36,6 +37,7 @@ struct TimelineCellLayout {
 		self.unreadIndicatorRect = unreadIndicatorRect
 		self.starRect = starRect
 		self.avatarImageRect = avatarImageRect
+		self.separatorRect = separatorRect
 		self.paddingBottom = paddingBottom
 
 		if height > 0.1 {
@@ -73,10 +75,11 @@ struct TimelineCellLayout {
 		let avatarImageRect = TimelineCellLayout.rectForAvatar(cellData, appearance, showAvatar, textBoxRect, width, height)
 		let unreadIndicatorRect = TimelineCellLayout.rectForUnreadIndicator(appearance, textBoxRect)
 		let starRect = TimelineCellLayout.rectForStar(appearance, unreadIndicatorRect)
+		let separatorRect = TimelineCellLayout.rectForSeparator(cellData, appearance, showAvatar ? avatarImageRect : titleRect, width, height)
 
 		let paddingBottom = appearance.cellPadding.bottom
 
-		self.init(width: width, height: height, feedNameRect: feedNameRect, dateRect: dateRect, titleRect: titleRect, numberOfLinesForTitle: numberOfLinesForTitle, summaryRect: summaryRect, textRect: textRect, unreadIndicatorRect: unreadIndicatorRect, starRect: starRect, avatarImageRect: avatarImageRect, paddingBottom: paddingBottom)
+		self.init(width: width, height: height, feedNameRect: feedNameRect, dateRect: dateRect, titleRect: titleRect, numberOfLinesForTitle: numberOfLinesForTitle, summaryRect: summaryRect, textRect: textRect, unreadIndicatorRect: unreadIndicatorRect, starRect: starRect, avatarImageRect: avatarImageRect, separatorRect: separatorRect, paddingBottom: paddingBottom)
 	}
 
 	static func height(for width: CGFloat, cellData: TimelineCellData, appearance: TimelineCellAppearance) -> CGFloat {
@@ -210,6 +213,10 @@ private extension TimelineCellLayout {
 
 		return r
 	}
+	
+	static func rectForSeparator(_ cellData: TimelineCellData, _ appearance: TimelineCellAppearance, _ alignmentRect: NSRect, _ width: CGFloat, _ height: CGFloat) -> NSRect {
+		return NSRect(x: alignmentRect.minX, y: height - 1, width: width - alignmentRect.minX, height: 1)
+	}
 }
 
 private extension Array where Element == NSRect {

Mac/MainWindow/Timeline/Cell/TimelineTableCellView.swift

@@ -27,11 +27,18 @@ class TimelineTableCellView: NSTableCellView {
 	}()
 
 	private let starView = TimelineTableCellView.imageView(with: AppAssets.timelineStar, scaling: .scaleNone)
+	private let separatorView = TimelineTableCellView.separatorView()
 
 	private lazy var textFields = {
 		return [self.dateView, self.feedNameView, self.titleView, self.summaryView, self.textView]
 	}()
 
+	private var showsSeparator: Bool = AppDefaults.timelineShowsSeparators {
+		didSet {
+			separatorView.isHidden = !showsSeparator
+		}
+	}
+	
 	var cellAppearance: TimelineCellAppearance! {
 		didSet {
 			if cellAppearance != oldValue {
@@ -77,6 +84,15 @@ class TimelineTableCellView: NSTableCellView {
 	convenience init() {
 		self.init(frame: NSRect.zero)
 	}
+	
+	override func prepareForReuse() {
+		super.prepareForReuse()
+		separatorView.isHidden = !showsSeparator
+	}
+	
+	func timelineShowsSeparatorsDefaultDidChange() {
+		showsSeparator = AppDefaults.timelineShowsSeparators
+	}
 
 	override func setFrameSize(_ newSize: NSSize) {
 		
@@ -111,6 +127,7 @@ class TimelineTableCellView: NSTableCellView {
 		feedNameView.rs_setFrameIfNotEqual(layoutRects.feedNameRect)
 		avatarImageView.rs_setFrameIfNotEqual(layoutRects.avatarImageRect)
 		starView.rs_setFrameIfNotEqual(layoutRects.starRect)
+		separatorView.rs_setFrameIfNotEqual(layoutRects.separatorRect)
 	}
 }
 
@@ -148,6 +165,11 @@ private extension TimelineTableCellView {
 		imageView.imageScaling = scaling
 		return imageView
 	}
+	
+	static func separatorView() -> NSView {
+
+		return TimelineSeparatorView(frame: .zero)
+	}
 
 	func setFrame(for textField: NSTextField, rect: NSRect) {
 
@@ -193,6 +215,7 @@ private extension TimelineTableCellView {
 		addSubviewAtInit(feedNameView, hidden: true)
 		addSubviewAtInit(avatarImageView, hidden: true)
 		addSubviewAtInit(starView, hidden: true)
+		addSubviewAtInit(separatorView, hidden: !AppDefaults.timelineShowsSeparators)
 
 		makeTextFieldColorsNormal()
 	}
@@ -296,3 +319,32 @@ private extension TimelineTableCellView {
 		updateAvatar()
 	}
 }
+
+// MARK: -
+
+private class TimelineSeparatorView: NSView {
+	private static let backgroundColor = NSColor(named: "timelineSeparatorColor")!
+	
+	override init(frame: NSRect) {
+		super.init(frame: frame)
+		self.wantsLayer = true
+	}
+	
+	required init?(coder: NSCoder) {
+		fatalError("init(coder:) has not been implemented")
+	}
+	
+	override func viewDidChangeEffectiveAppearance() {
+		super.viewDidChangeEffectiveAppearance()
+		needsDisplay = true
+	}
+	
+	override var wantsUpdateLayer: Bool {
+		return true
+	}
+	
+	override func updateLayer() {
+		super.updateLayer()
+		layer?.backgroundColor = TimelineSeparatorView.backgroundColor.cgColor
+	}
+}

Mac/MainWindow/Timeline/TimelineViewController.swift

@@ -141,12 +141,14 @@ final class TimelineViewController: NSViewController, UndoableCommandRunner, Unr
 	}
 
 	private let keyboardDelegate = TimelineKeyboardDelegate()
+	private var timelineShowsSeparatorsObserver: NSKeyValueObservation?
 
 	convenience init(delegate: TimelineDelegate) {
 		self.init(nibName: "TimelineTableView", bundle: nil)
 		self.delegate = delegate
+		self.startObservingUserDefaults()
 	}
-
+	
 	override func viewDidLoad() {
 
 		cellAppearance = TimelineCellAppearance(showAvatar: false, fontSize: fontSize)
@@ -846,6 +848,19 @@ extension TimelineViewController: NSTableViewDelegate {
 
 private extension TimelineViewController {
 
+	func startObservingUserDefaults() {
+		
+		assert(timelineShowsSeparatorsObserver == nil)
+		timelineShowsSeparatorsObserver = UserDefaults.standard.observe(\UserDefaults.CorreiaSeparators) { [weak self] (_, _) in
+			guard let self = self, self.isViewLoaded else { return }
+			self.tableView.enumerateAvailableRowViews { (rowView, index) in
+				if let cellView = rowView.view(atColumn: 0) as? TimelineTableCellView {
+					cellView.timelineShowsSeparatorsDefaultDidChange()
+				}
+			}
+		}
+	}
+	
 	@objc func reloadAvailableCells() {
 
 		if let indexesToReload = tableView.indexesOfAvailableRows() {
@@ -1114,4 +1129,3 @@ private extension TimelineViewController {
 		return false
 	}
 }
-

Mac/Resources/Assets.xcassets/timelineSeparatorColor.colorset/Contents.json

@@ -0,0 +1,31 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  },
+  "colors" : [
+    {
+      "idiom" : "universal",
+      "color" : {
+        "color-space" : "gray-gamma-22",
+        "components" : {
+          "white" : "0.900",
+          "alpha" : "1.000"
+        }
+      }
+    },
+    {
+      "idiom" : "universal",
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "color" : {
+        "platform" : "osx",
+        "reference" : "gridColor"
+      }
+    }
+  ]
+}