Use gemini:// as default protocol for typed URLs

BrowserCore/NavigationManager.swift

@@ -24,13 +24,29 @@ public class NavigationManager: NSObject, ObservableObject {
     }
     
     public func changeURL(_ url: URL) {
-        guard url.scheme == "gemini" else {
+        var components = URLComponents(url: url, resolvingAgainstBaseURL: false)!
+        if let scheme = url.scheme {
+            if scheme != "gemini" {
                 delegate?.loadNonGeminiURL(url)
                 return
             }
+            if components.port == 1965 {
+                components.port = nil
+            }
+        } else {
+            components.scheme = "gemini"
+        }
+        
+        // Foundation parses bare hosts (e.g. `example.com`) as having no host and a path of `example.com`
+        if components.host == nil {
+            components.host = components.path
+            components.path = "/"
+        }
+        
+        let url = components.url!
         
         backStack.append(currentURL)
-        currentURL = cannonicalizeURL(url)
+        currentURL = url
         forwardStack = []
     }
     
@@ -39,14 +55,6 @@ public class NavigationManager: NSObject, ObservableObject {
         currentURL = url
     }
     
-    private func cannonicalizeURL(_ url: URL) -> URL {
-        var components = URLComponents(url: url, resolvingAgainstBaseURL: false)!
-        if components.scheme == "gemini" && components.port == 1965 {
-            components.port = nil
-        }
-        return components.url!
-    }
-    
     @objc public func back() {
         guard !backStack.isEmpty else { return }
         forwardStack.insert(currentURL, at: 0)