Add scroll or go to next unread keyboard shortcut

iOS/Detail/DetailViewController.swift

@@ -184,8 +184,33 @@ class DetailViewController: UIViewController {
 		webView.becomeFirstResponder()
 	}
 
+	func finalScrollPosition() -> CGFloat {
+		return webView.scrollView.contentSize.height - webView.scrollView.bounds.size.height + webView.scrollView.contentInset.bottom
 	}
 	
+	func canScrollDown() -> Bool {
+		return webView.scrollView.contentOffset.y < finalScrollPosition()
+	}
+
+	func scrollPageDown() {
+		let scrollToY: CGFloat = {
+			let fullScroll = webView.scrollView.contentOffset.y + webView.scrollView.bounds.size.height
+			let final = finalScrollPosition()
+			if fullScroll < final {
+				return fullScroll
+			} else {
+				return final
+			}
+		}()
+		
+		let convertedPoint = self.view.convert(CGPoint(x: 0, y: 0), to: webView.scrollView)
+		let scrollToPoint = CGPoint(x: convertedPoint.x, y: scrollToY)
+		webView.scrollView.setContentOffset(scrollToPoint, animated: true)
+	}
+	
+}
+//print("\(candidateY) : \(webView.scrollView.contentSize.height)")
+
 class ArticleActivityItemSource: NSObject, UIActivityItemSource {
 	
 	private let url: URL

iOS/KeyboardManager.swift

@@ -60,7 +60,7 @@ private extension KeyboardManager {
 		
 		switch(key) {
 		case "[space]":
-			return " "
+			return "\u{0020}"
 		case "[uparrow]":
 			return UIKeyCommand.inputUpArrow
 		case "[downarrow]":

iOS/RootSplitViewController.swift

@@ -19,7 +19,9 @@ class RootSplitViewController: UISplitViewController {
 	}
 
 	// MARK: Keyboard Shortcuts
+	
 	@objc func scrollOrGoToNextUnread(_ sender: Any?) {
+		coordinator.scrollOrGoToNextUnread()
 	}
 	
 	@objc func goToPreviousUnread(_ sender: Any?) {

iOS/SceneCoordinator.swift

@@ -753,6 +753,14 @@ class SceneCoordinator: NSObject, UndoableCommandRunner, UnreadCountProvider {
 
 	}
 	
+	func scrollOrGoToNextUnread() {
+		if detailViewController?.canScrollDown() ?? false {
+			detailViewController?.scrollPageDown()
+		} else {
+			selectNextUnread()
+		}
+	}
+	
 	func markAllAsRead(_ articles: [Article]) {
 		guard let undoManager = undoManager, let markReadCommand = MarkStatusCommand(initialArticles: articles, markingRead: true, undoManager: undoManager) else {
 			return