Add context menu for Fullscreen mode actions. Issue #1344

Shared/Data/ArticleUtilities.swift

@@ -92,6 +92,50 @@ extension Article {
 		
 		return FaviconGenerator.favicon(webFeed)
 	}
+	
+	func byline() -> String {
+		guard let authors = authors ?? webFeed?.authors, !authors.isEmpty else {
+			return ""
+		}
+
+		// If the author's name is the same as the feed, then we don't want to display it.
+		// This code assumes that multiple authors would never match the feed name so that
+		// if there feed owner has an article co-author all authors are given the byline.
+		if authors.count == 1, let author = authors.first {
+			if author.name == webFeed?.nameForDisplay {
+				return ""
+			}
+		}
+		
+		var byline = ""
+		var isFirstAuthor = true
+
+		for author in authors {
+			if !isFirstAuthor {
+				byline += ", "
+			}
+			isFirstAuthor = false
+
+			if let emailAddress = author.emailAddress, emailAddress.contains(" ") {
+				byline += emailAddress // probably name plus email address
+			}
+			else if let name = author.name, let emailAddress = author.emailAddress {
+				byline += "\(name) <\(emailAddress)>"
+			}
+			else if let name = author.name {
+				byline += name
+			}
+			else if let emailAddress = author.emailAddress {
+				byline += "<\(emailAddress)>"
+			}
+			else if let url = author.url {
+				byline += url
+			}
+		}
+
+		return byline
+	}
+	
 }
 
 // MARK: Path