iOS: Add back/forward history context menus

BrowserCore/NavigationManager.swift

@@ -71,10 +71,28 @@ public class NavigationManager: NSObject, ObservableObject {
         currentURL = backStack.removeLast()
     }
     
+    public func back(count: Int) {
+        guard count <= backStack.count else { return }
+        var removed = backStack.suffix(count)
+        backStack.removeLast(count)
+        forwardStack.insert(currentURL, at: 0)
+        currentURL = removed.removeFirst()
+        forwardStack.insert(contentsOf: removed, at: 0)
+    }
+    
     @objc public func forward() {
         guard !forwardStack.isEmpty else { return }
         backStack.append(currentURL)
         currentURL = forwardStack.removeFirst()
     }
     
+    public func forward(count: Int) {
+        guard count <= forwardStack.count else { return }
+        var removed = forwardStack.prefix(count)
+        forwardStack.removeFirst(count)
+        backStack.append(currentURL)
+        currentURL = removed.removeLast()
+        backStack.append(contentsOf: removed)
+    }
+    
 }

Gemini-iOS/ToolBar.swift

@@ -30,6 +30,15 @@ struct ToolBar: View {
                         Image(systemName: "arrow.left")
                             .font(.system(size: 24))
                     }
+                    .contextMenu {
+                        ForEach(Array(navigator.backStack.suffix(5).enumerated()), id: \.1) { (index, url) in
+                            Button {
+                                navigator.back(count: min(5, navigator.backStack.count) - index)
+                            } label: {
+                                Text(verbatim: urlForDisplay(url))
+                            }
+                        }
+                    }
                     .disabled(navigator.backStack.isEmpty)
                     
                     Spacer()
@@ -38,6 +47,15 @@ struct ToolBar: View {
                         Image(systemName: "arrow.right")
                             .font(.system(size: 24))
                     }
+                    .contextMenu {
+                        ForEach(navigator.forwardStack.prefix(5).enumerated().reversed(), id: \.1) { (index, url) in
+                            Button {
+                                navigator.forward(count: index + 1)
+                            } label: {
+                                Text(verbatim: urlForDisplay(url))
+                            }
+                        }
+                    }
                     .disabled(navigator.forwardStack.isEmpty)
                     
                     Spacer()
@@ -74,6 +92,16 @@ struct ToolBar: View {
             PreferencesView(presented: $showPreferencesSheet)
         })
     }
+    
+    private func urlForDisplay(_ url: URL) -> String {
+        var str = url.host!
+        if let port = url.port,
+           url.scheme != "gemini" || port != 1965 {
+            str += ":\(port)"
+        }
+        str += url.path
+        return str
+    }
 }
 
 struct ToolBar_Previews: PreviewProvider {