Replace “Mark Older as Read” actions with “Mark Above/Below as Read” actions

iOS/AppAssets.swift

@@ -117,11 +117,11 @@ struct AppAssets {
 		return UIImage(systemName: "asterisk.circle")!
 	}()
 	
-	static var markOlderAsReadDownImage: UIImage = {
+	static var markBelowAsReadImage: UIImage = {
 		return UIImage(systemName: "arrowtriangle.down.circle")!
 	}()
 	
-	static var markOlderAsReadUpImage: UIImage = {
+	static var markAboveAsReadImage: UIImage = {
 		return UIImage(systemName: "arrowtriangle.up.circle")!
 	}()
 	

iOS/KeyboardManager.swift

@@ -168,8 +168,8 @@ private extension KeyboardManager {
 		let toggleReadTitle = NSLocalizedString("Toggle Read Status", comment: "Toggle Read Status")
 		keys.append(KeyboardManager.createKeyCommand(title: toggleReadTitle, action: "toggleRead:", input: "u", modifiers: [.command, .shift]))
 
-		let markOlderAsReadTitle = NSLocalizedString("Mark Older as Read", comment: "Mark Older as Read")
-		keys.append(KeyboardManager.createKeyCommand(title: markOlderAsReadTitle, action: "markOlderArticlesAsRead:", input: "k", modifiers: [.command, .shift]))
+		let markOlderAsReadTitle = NSLocalizedString("Mark Below as Read", comment: "Mark Below as Read")
+		keys.append(KeyboardManager.createKeyCommand(title: markOlderAsReadTitle, action: "markBelowAsRead:", input: "k", modifiers: [.command, .shift]))
 
 		let toggleStarredTitle = NSLocalizedString("Toggle Starred Status", comment: "Toggle Starred Status")
 		keys.append(KeyboardManager.createKeyCommand(title: toggleStarredTitle, action: "toggleStarred:", input: "l", modifiers: [.command, .shift]))

iOS/MasterTimeline/MasterTimelineViewController.swift

@@ -246,7 +246,13 @@ class MasterTimelineViewController: UITableViewController, UndoableCommandRunner
 					popoverController.sourceRect = CGRect(x: view.frame.size.width/2, y: view.frame.size.height/2, width: 1, height: 1)
 				}
 
-				alert.addAction(self.markOlderAsReadAlertAction(article, completion: completion))
+				if let action = self.markAboveAsReadAlertAction(article, completion: completion) {
+					alert.addAction(action)
+				}
+
+				if let action = self.markBelowAsReadAlertAction(article, completion: completion) {
+					alert.addAction(action)
+				}
 				
 				if let action = self.discloseFeedAlertAction(article, completion: completion) {
 					alert.addAction(action)
@@ -293,7 +299,14 @@ class MasterTimelineViewController: UITableViewController, UndoableCommandRunner
 			var actions = [UIAction]()
 			actions.append(self.toggleArticleReadStatusAction(article))
 			actions.append(self.toggleArticleStarStatusAction(article))
-			actions.append(self.markOlderAsReadAction(article))
+
+			if let action = self.markAboveAsReadAction(article) {
+				actions.append(action)
+			}
+
+			if let action = self.markBelowAsReadAction(article) {
+				actions.append(action)
+			}
 			
 			if let action = self.discloseFeedAction(article) {
 				actions.append(action)
@@ -637,19 +650,53 @@ private extension MasterTimelineViewController {
 		return action
 	}
 
-	func markOlderAsReadAction(_ article: Article) -> UIAction {
-		let title = NSLocalizedString("Mark Older as Read", comment: "Mark Older as Read")
-		let image = coordinator.sortDirection == .orderedDescending ? AppAssets.markOlderAsReadDownImage : AppAssets.markOlderAsReadUpImage
+	func markAboveAsReadAction(_ article: Article) -> UIAction? {
+		guard coordinator.canMarkAboveAsRead(for: article) else {
+			return nil
+		}
+
+		let title = NSLocalizedString("Mark Above as Read", comment: "Mark Above as Read")
+		let image = AppAssets.markAboveAsReadImage
 		let action = UIAction(title: title, image: image) { [weak self] action in
-			self?.coordinator.markAsReadOlderArticlesInTimeline(article)
+			self?.coordinator.markAboveAsRead(article)
 		}
 		return action
 	}
 	
-	func markOlderAsReadAlertAction(_ article: Article, completion: @escaping (Bool) -> Void) -> UIAlertAction {
-		let title = NSLocalizedString("Mark Older as Read", comment: "Mark Older as Read")
+	func markBelowAsReadAction(_ article: Article) -> UIAction? {
+		guard coordinator.canMarkBelowAsRead(for: article) else {
+			return nil
+		}
+
+		let title = NSLocalizedString("Mark Below as Read", comment: "Mark Below as Read")
+		let image = AppAssets.markBelowAsReadImage
+		let action = UIAction(title: title, image: image) { [weak self] action in
+			self?.coordinator.markBelowAsRead(article)
+		}
+		return action
+	}
+	
+	func markAboveAsReadAlertAction(_ article: Article, completion: @escaping (Bool) -> Void) -> UIAlertAction? {
+		guard coordinator.canMarkAboveAsRead(for: article) else {
+			return nil
+		}
+
+		let title = NSLocalizedString("Mark Above as Read", comment: "Mark Above as Read")
 		let action = UIAlertAction(title: title, style: .default) { [weak self] action in
-			self?.coordinator.markAsReadOlderArticlesInTimeline(article)
+			self?.coordinator.markAboveAsRead(article)
+			completion(true)
+		}
+		return action
+	}
+
+	func markBelowAsReadAlertAction(_ article: Article, completion: @escaping (Bool) -> Void) -> UIAlertAction? {
+		guard coordinator.canMarkBelowAsRead(for: article) else {
+			return nil
+		}
+
+		let title = NSLocalizedString("Mark Below as Read", comment: "Mark Below as Read")
+		let action = UIAlertAction(title: title, style: .default) { [weak self] action in
+			self?.coordinator.markBelowAsRead(article)
 			completion(true)
 		}
 		return action

iOS/RootSplitViewController.swift

@@ -54,8 +54,8 @@ class RootSplitViewController: UISplitViewController {
 		coordinator.selectNextUnread()
 	}
 	
-	@objc func markOlderArticlesAsRead(_ sender: Any?) {
-		coordinator.markAsReadOlderArticlesInTimeline()
+	@objc func markBelowAsRead(_ sender: Any?) {
+		coordinator.markBelowAsRead()
 	}
 	
 	@objc func markUnread(_ sender: Any?) {

iOS/SceneCoordinator.swift

@@ -871,18 +871,44 @@ class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
 		masterNavigationController.popViewController(animated: true)
 	}
 
-	func markAsReadOlderArticlesInTimeline() {
-		if let article = currentArticle {
-			markAsReadOlderArticlesInTimeline(article)
-		}
+	func canMarkAboveAsRead(for article: Article) -> Bool {
+		return articles.first != article
 	}
 
-	func markAsReadOlderArticlesInTimeline(_ article: Article) {
-		let articlesToMark = articles.filter { $0.logicalDatePublished < article.logicalDatePublished }
-		if articlesToMark.isEmpty {
+	func markAboveAsRead(_ article: Article) {
+		guard let position = articles.firstIndex(of: article) else {
 			return
 		}
-		markAllAsRead(articlesToMark)
+
+		let articlesAbove = articles[..<position]
+		markAllAsRead(Array(articlesAbove))
+	}
+
+	func canMarkBelowAsRead(for article: Article) -> Bool {
+		return articles.last != article
+	}
+
+	func markBelowAsRead() {
+		guard let currentArticle = currentArticle else {
+			return
+		}
+
+		markBelowAsRead(currentArticle)
+	}
+
+	func markBelowAsRead(_ article: Article) {
+		guard let position = articles.firstIndex(of: article) else {
+			return
+		}
+
+		var articlesBelow = Array(articles[position...])
+
+		guard !articlesBelow.isEmpty else {
+			return
+		}
+
+		articlesBelow.removeFirst()
+		markAllAsRead(articlesBelow)
 	}
 	
 	func markAsReadForCurrentArticle() {