Implement open in browser timeline context menu item.

Multiplatform/Shared/SceneModel.swift

@@ -6,11 +6,7 @@
 //  Copyright © 2020 Ranchero Software. All rights reserved.
 //
 
-#if os(macOS)
-import AppKit
-#else
-import UIKit
-#endif
+import Foundation
 import Combine
 import Account
 import Articles
@@ -58,28 +54,22 @@ final class SceneModel: ObservableObject {
 		}
 	}
 	
-	// MARK Navigation API
-	
-	func openInBrowser() {
-		guard let link = selectedArticles.first?.preferredLink else { return }
-		
-		#if os(macOS)
-		Browser.open(link, invertPreference: NSApp.currentEvent?.modifierFlags.contains(.shift) ?? false)
-		#else
-		guard let url = URL(string: link) else { return }
-		UIApplication.shared.open(url, options: [:])
-		#endif
-	}
-	
 	// MARK: Article Management API
 	
+	/// Toggles the read status for the selected articles
 	func toggleReadStatusForSelectedArticles() {
 		timelineModel.toggleReadStatusForSelectedArticles()
 	}
 	
+	/// Toggles the star status for the selected articles
 	func toggleStarredStatusForSelectedArticles() {
 		timelineModel.toggleStarredStatusForSelectedArticles()
 	}
+
+	/// Opens the selected article in an external browser
+	func openSelectedArticleInBrowser() {
+		timelineModel.openSelectedArticleInBrowser()
+	}
 	
 	/// Retrieves the article before the given article in the Timeline
 	func findPrevArticle(_ article: Article) -> Article? {

Multiplatform/Shared/SceneNavigationView.swift

@@ -158,7 +158,7 @@ struct SceneNavigationView: View {
 			}
 			ToolbarItem {
 				Button {
-					sceneModel.openInBrowser()
+					sceneModel.openSelectedArticleInBrowser()
 				} label: {
 					AppAssets.openInBrowserImage
 				}

Multiplatform/Shared/Timeline/TimelineContextMenu.swift

@@ -81,5 +81,17 @@ struct TimelineContextMenu: View {
 			}
 		}
 		
+		if timelineModel.canOpenIndicatedArticleInBrowser(timelineItem.article) {
+			Divider()
+			Button {
+				timelineModel.openIndicatedArticleInBrowser(timelineItem.article)
+			} label: {
+				Text("Open in Browser")
+				#if os(iOS)
+				AppAssets.openInBrowserImage
+				#endif
+			}
+		}
+		
 	}
 }

Multiplatform/Shared/Timeline/TimelineModel.swift

@@ -6,7 +6,11 @@
 //  Copyright © 2020 Ranchero Software. All rights reserved.
 //
 
-import Foundation
+#if os(macOS)
+import AppKit
+#else
+import UIKit
+#endif
 import Combine
 import RSCore
 import Account
@@ -223,6 +227,27 @@ class TimelineModel: ObservableObject, UndoableCommandRunner {
 	func markSelectedArticlesAsUnstarred() {
 		markArticlesWithUndo(selectedArticles, statusKey: .starred, flag: false)
 	}
+	
+	func canOpenIndicatedArticleInBrowser(_ article: Article) -> Bool {
+		guard indicatedArticles(article).count == 1 else { return false }
+		return article.preferredLink != nil
+	}
+	
+	func openIndicatedArticleInBrowser(_ article: Article) {
+		guard let link = article.preferredLink else { return }
+		
+		#if os(macOS)
+		Browser.open(link, invertPreference: NSApp.currentEvent?.modifierFlags.contains(.shift) ?? false)
+		#else
+		guard let url = URL(string: link) else { return }
+		UIApplication.shared.open(url, options: [:])
+		#endif
+	}
+	
+	func openSelectedArticleInBrowser() {
+		guard let article = selectedArticles.first else { return }
+		openIndicatedArticleInBrowser(article)
+	}
 
 	func articleFor(_ articleID: String) -> Article? {
 		return idToArticleDictionary[articleID]