Add navigation stack

Sources/Core/View/Label.swift

@@ -30,10 +30,10 @@ public struct Label: SwiftUIWidget {
     public static func view(properties: Self) -> some SwiftUI.View {
         SwiftUI.Label {
             SwiftUI.Text(properties.label)
+            SwiftUI.Spacer()
         } icon: {
             properties.icon.image
         }
-
     }
 
 }

Sources/Core/View/NavigationStack.swift

@@ -0,0 +1,120 @@
+//
+//  NavigationStack.swift
+//  MacBackend
+//
+//  Created by david-swift on 14.12.2024.
+//
+
+import SwiftUI
+
+/// The navigation stack view.
+public struct NavigationStack<Component>: SwiftUIWidget where Component: CustomStringConvertible {
+
+    /// The current navigation path.
+    @Meta.Binding var path: NavigationPath
+    /// The content.
+    var content: (Component) -> Body
+    /// The initial view.
+    var initialView: Body
+
+    /// The wrapped views.
+    public var wrappedViews: [String: Meta.AnyView] {
+        if let current = path.current {
+            _ = current
+            return [.mainContent: initialView, current.description: content(current)]
+        } else {
+            return [.mainContent: initialView]
+        }
+    }
+
+    /// Initialize the navigation stack.
+    /// - Parameters:
+    ///   - path: The path.
+    ///   - content: The content.
+    ///   - initialView: The initial view.
+    public init(
+        path: Meta.Binding<NavigationPath>,
+        @Meta.ViewBuilder content: @escaping (Component) -> Body,
+        @Meta.ViewBuilder initialView: () -> Body
+    ) {
+        self._path = path
+        self.content = content
+        self.initialView = initialView()
+    }
+
+    /// The navigation path.
+    public struct NavigationPath {
+
+        /// The path.
+        var path: [Component] = []
+        /// The current component.
+        var current: Component? { path.last }
+
+        /// The path as an array of strings.
+        var hashable: [String] {
+            get {
+                path.map { $0.description }
+            }
+            set {
+                if newValue.count < hashable.count {
+                    _ = path.popLast()
+                }
+            }
+        }
+
+        /// Initialize a navigation stack.
+        public init() { }
+
+        /// Pop the last element.
+        public mutating func pop() {
+            _ = path.popLast()
+        }
+
+        /// Add a new element.
+        /// - Parameter component: The element.
+        public mutating func push(_ component: Component) {
+            path.append(component)
+        }
+
+    }
+
+    /// Receive the SwiftUI view.
+    /// - Parameter properties: The properties.
+    /// - Returns: The SwiftUI view.
+    public static func view(properties: Self) -> some SwiftUI.View {
+        SwiftUINavigationStack(path: properties.$path.swiftUI)
+    }
+
+}
+
+/// The SwiftUI navigation stack.
+struct SwiftUINavigationStack<Component>: SwiftUI.View where Component: CustomStringConvertible {
+
+    /// The path.
+    @SwiftUI.Binding var path: NavigationPath<Component>
+    /// The views.
+    @SwiftUI.Environment(\.views)
+    var views
+
+    /// The view's body.
+    var body: some SwiftUI.View {
+        SwiftUI.NavigationStack(path: $path.hashable) {
+            let view = MacBackendView(.mainContent)
+            if path.current != nil {
+                view
+                    .navigationDestination(for: String.self) { string in
+                        SwiftUI.VStack {
+                            MacBackendView(string)
+                                .environment(\.views, views)
+                        }
+                    }
+            } else {
+                view
+            }
+        }
+    }
+
+}
+
+/// The navigation path.
+public typealias NavigationPath<Component: CustomStringConvertible> = NavigationStack<Component>.NavigationPath

Sources/Core/Window/MenuBar.swift

@@ -59,7 +59,6 @@ public struct MenuBar: MacSceneElement {
         let scene = SceneStorage(id: id, pointer: app.mainMenu) { }
         let data = WidgetData(sceneStorage: scene, appStorage: app)
         let storage = MenuCollection { self.content }.getMenu(data: data, menu: app.mainMenu)
-        print(app.helpItem.submenu)
         let appStorage = MenuCollection { self.app }.getMenu(data: data, menu: app.appItem.submenu)
         let windowStorage = MenuCollection { self.window }.getMenu(data: data, menu: app.windowsItem.submenu)
         let helpStorage = MenuCollection { self.help }.getMenu(data: data, menu: app.helpItem.submenu)

Sources/Demo/Demo.swift

@@ -20,53 +20,38 @@ struct Demo: App {
     @State(blockUpdates: true)
     private var width = 500
     @State(blockUpdates: true)
-    private var height = 400
+    private var height = 450
     @State private var elements: [Element] = [.init()]
     @State private var selectedElement: String?
-    @State private var alert = false
-    @State private var presentMenu: Signal = .init()
     @State private var selection = "Hello"
+    @State private var path: NavigationPath<Navigation> = .init()
 
     var scene: Scene {
-        Window(id: "secondary") { _ in
-            Text(selection)
-                .centeredToolbar {
-                    Picker("Test", items: ["Hello", "World"], selection: $selection)
-                        .segmented()
-                }
-        }
-        .frame(width: .constant(800), height: .constant(600))
         Window("Main", id: "main") { _ in
             NavigationSplitView {
                 List(elements, selection: $selectedElement) { element in
                     Label(element.id, icon: .system(name: "play.fill"))
                 }
             } detail: {
-                VStack {
-                    Button(selectedElement ?? "World") {
-                        let element = Element()
-                        elements.append(element)
-                        selectedElement = element.id
+                NavigationStack(path: $path) { navigation in
+                    Button(navigation.description) {
+                        selectedElement = nil
                     }
-                    Button(alert.description) {
-                        presentMenu.signal()
-                    }
-                    .menu(present: presentMenu) {
-                        MenuButton(alert.description) {
-                            print("Hi")
+                } initialView: {
+                    VStack {
+                        Button(selectedElement ?? "World") {
+                            let element = Element()
+                            elements.append(element)
+                            selectedElement = element.id
+                        }
+                        Button("Navigate") {
+                            path.push(.test)
                         }
                     }
-                }
-                .alert("Hello", isPresented: $alert)
-                .cancelButton("Cancel") {
-                    print("Cancel")
-                }
-                .destructiveButton("Destructive", default: true) {
-                    print("Destructive")
-                }
-                .toolbar {
-                    Button("World", icon: .system(name: "globe")) {
-                        print("World")
+                    .toolbar {
+                        Button("World", icon: .system(name: "globe")) {
+                            print("World")
+                        }
                     }
                 }
             }
@@ -138,4 +123,14 @@ struct Element: Identifiable {
 
 }
 
+enum Navigation: CustomStringConvertible {
+
+    case test
+
+    var description: String {
+        "Test"
+    }
+
+}
+
 // swiftlint:enable missing_docs no_magic_numbers closure_body_length