Implement Mark Above and Mark Below context menu items.

Multiplatform/Shared/AppAssets.swift

@@ -126,6 +126,14 @@ struct AppAssets {
 	}()
 	#endif
 
+	static var markBelowAsReadImage: Image = {
+		return Image(systemName: "arrowtriangle.down.circle")
+	}()
+	
+	static var markAboveAsReadImage: Image = {
+		return Image(systemName: "arrowtriangle.up.circle")
+	}()
+	
 	static var nextArticleImage: Image = {
 		return Image(systemName: "chevron.down")
 	}()

Multiplatform/Shared/Timeline/TimelineContextMenu.swift

@@ -0,0 +1,41 @@
+//
+//  TimelineContextMenu.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 7/17/20.
+//  Copyright © 2020 Ranchero Software. All rights reserved.
+//
+
+import SwiftUI
+
+struct TimelineContextMenu: View {
+	
+	@EnvironmentObject private var timelineModel: TimelineModel
+	var timelineItem: TimelineItem
+
+    @ViewBuilder var body: some View {
+		
+		if timelineModel.canMarkAboveAsRead(timelineItem.article) {
+			Button {
+				timelineModel.markAboveAsRead(timelineItem.article)
+			} label: {
+				Text("Mark Above as Read")
+				#if os(iOS)
+				AppAssets.markAboveAsReadImage
+				#endif
+			}
+		}
+		
+		if timelineModel.canMarkBelowAsRead(timelineItem.article) {
+			Button {
+				timelineModel.markBelowAsRead(timelineItem.article)
+			} label: {
+				Text("Mark Below As Read")
+				#if os(iOS)
+				AppAssets.markBelowAsReadImage
+				#endif
+			}
+		}
+		
+	}
+}

Multiplatform/Shared/Timeline/TimelineItemView.swift

@@ -67,5 +67,8 @@ struct TimelineItemView: View {
 		.onAppear {
 			articleIconImageLoader.loadImage(for: timelineItem.article)
 		}
+		.contextMenu {
+			TimelineContextMenu(timelineItem: timelineItem)
+		}
     }
 }

Multiplatform/Shared/Timeline/TimelineModel.swift

@@ -171,6 +171,32 @@ class TimelineModel: ObservableObject, UndoableCommandRunner {
 		}
 		runCommand(markUnreadCommand)
 	}
+
+	func canMarkAboveAsRead(_ article: Article) -> Bool {
+		return articles.articlesAbove(article: article).canMarkAllAsRead()
+	}
+
+	func canMarkBelowAsRead(_ article: Article) -> Bool {
+		return articles.articlesBelow(article: article).canMarkAllAsRead()
+	}
+
+	func markAboveAsRead(_ article: Article) {
+		let articlesToMark = articles.articlesAbove(article: article)
+		guard !articlesToMark.isEmpty else { return }
+		guard let undoManager = undoManager, let markReadCommand = MarkStatusCommand(initialArticles: articlesToMark, markingRead: true, undoManager: undoManager) else {
+			return
+		}
+		runCommand(markReadCommand)
+	}
+
+	func markBelowAsRead(_ article: Article) {
+		let articlesToMark = articles.articlesBelow(article: article)
+		guard !articlesToMark.isEmpty else { return }
+		guard let undoManager = undoManager, let markReadCommand = MarkStatusCommand(initialArticles: articlesToMark, markingRead: true, undoManager: undoManager) else {
+			return
+		}
+		runCommand(markReadCommand)
+	}
 	
 	func articleFor(_ articleID: String) -> Article? {
 		return idToArticleDictionary[articleID]

NetNewsWire.xcodeproj/project.pbxproj

@@ -374,6 +374,8 @@
 		51B8104624C0E6D200C6C32D /* TimelineTextSizer.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51B8104424C0E6D200C6C32D /* TimelineTextSizer.swift */; };
 		51B8BCC224C25C3E00360B00 /* SidebarContextMenu.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51B8BCC124C25C3E00360B00 /* SidebarContextMenu.swift */; };
 		51B8BCC324C25C3E00360B00 /* SidebarContextMenu.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51B8BCC124C25C3E00360B00 /* SidebarContextMenu.swift */; };
+		51B8BCE624C25F7C00360B00 /* TimelineContextMenu.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51B8BCE524C25F7C00360B00 /* TimelineContextMenu.swift */; };
+		51B8BCE724C25F7C00360B00 /* TimelineContextMenu.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51B8BCE524C25F7C00360B00 /* TimelineContextMenu.swift */; };
 		51BB7C272335A8E5008E8144 /* ArticleActivityItemSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51BB7C262335A8E5008E8144 /* ArticleActivityItemSource.swift */; };
 		51BB7C312335ACDE008E8144 /* page.html in Resources */ = {isa = PBXBuildFile; fileRef = 51BB7C302335ACDE008E8144 /* page.html */; };
 		51BC4AFF247277E0000A6ED8 /* URL-Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51BC4ADD247277DF000A6ED8 /* URL-Extensions.swift */; };
@@ -2038,6 +2040,7 @@
 		51B80F4524BF76E700C6C32D /* Browser.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Browser.swift; sourceTree = "<group>"; };
 		51B8104424C0E6D200C6C32D /* TimelineTextSizer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineTextSizer.swift; sourceTree = "<group>"; };
 		51B8BCC124C25C3E00360B00 /* SidebarContextMenu.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SidebarContextMenu.swift; sourceTree = "<group>"; };
+		51B8BCE524C25F7C00360B00 /* TimelineContextMenu.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineContextMenu.swift; sourceTree = "<group>"; };
 		51BB7C262335A8E5008E8144 /* ArticleActivityItemSource.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ArticleActivityItemSource.swift; sourceTree = "<group>"; };
 		51BB7C302335ACDE008E8144 /* page.html */ = {isa = PBXFileReference; lastKnownFileType = text.html; path = page.html; sourceTree = "<group>"; };
 		51BC4ADD247277DF000A6ED8 /* URL-Extensions.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "URL-Extensions.swift"; sourceTree = "<group>"; };
@@ -2952,6 +2955,7 @@
 			isa = PBXGroup;
 			children = (
 				51919FED24AB85E400541E64 /* TimelineContainerView.swift */,
+				51B8BCE524C25F7C00360B00 /* TimelineContextMenu.swift */,
 				51919FF324AB869C00541E64 /* TimelineItem.swift */,
 				514E6C0124AD29A300AC6F6E /* TimelineItemStatusView.swift */,
 				514E6BD924ACEA0400AC6F6E /* TimelineItemView.swift */,
@@ -5237,6 +5241,7 @@
 				51919FEE24AB85E400541E64 /* TimelineContainerView.swift in Sources */,
 				653A4E7924BCA5BB00EF2D7F /* SettingsCloudKitAccountView.swift in Sources */,
 				51E4995724A8734D00B667CB /* ExtensionPoint.swift in Sources */,
+				51B8BCE624C25F7C00360B00 /* TimelineContextMenu.swift in Sources */,
 				1776E88E24AC5F8A00E78166 /* AppDefaults.swift in Sources */,
 				51E4991124A808DE00B667CB /* SmallIconProvider.swift in Sources */,
 			);
@@ -5339,6 +5344,7 @@
 				1729529B24AA1FD200D65E66 /* MacSearchField.swift in Sources */,
 				51408B7F24A9EC6F0073CF4E /* SidebarItem.swift in Sources */,
 				514E6BDB24ACEA0400AC6F6E /* TimelineItemView.swift in Sources */,
+				51B8BCE724C25F7C00360B00 /* TimelineContextMenu.swift in Sources */,
 				51E4996E24A8764C00B667CB /* ActivityManager.swift in Sources */,
 				1769E33024BD6271000E1E8E /* EditAccountCredentialsView.swift in Sources */,
 				51E4995A24A873F900B667CB /* ErrorHandler.swift in Sources */,