Add ContentUnavailableView

Package.swift

@@ -109,16 +109,6 @@ let package = Package(
             ),
             dependencies: []
         ),
-
-        // Unfortunately, this tool cannot be a plugin due to limitations on network access.
-        // Once SwiftPM supports plugins with network access, this can become a plugin again.
-        .executableTarget(
-            name: "TutorialRepoGenerator",
-            dependencies: [
-                .product(name: "ArgumentParser", package: "swift-argument-parser"),
-                .product(name: "Markdown", package: "swift-markdown"),
-            ]
-        ),
 
         .macro(
             name: "LiveViewNativeMacros",

Sources/LiveViewNative/Stylesheets/ParseableTypes/AnyGesture+ParseableModifierValue.swift

@@ -324,6 +324,7 @@ struct _AnyGesture: ParseableModifierValue {
     }
     #endif
 
+    @MainActor
     @ParseableExpression
     struct LongPress {
         static let name = "LongPressGesture"

Sources/LiveViewNative/Stylesheets/ParseableTypes/PointerStyle+ParseableModifierValue.swift

@@ -10,7 +10,7 @@ import LiveViewNativeStylesheet
 
 #if os(macOS) || os(visionOS)
 @available(macOS 15, visionOS 2, *)
-extension PointerStyle: @retroactive ParseableModifierValue {
+extension PointerStyle: ParseableModifierValue {
     public static func parser(in context: ParseableModifierContext) -> some Parser<Substring.UTF8View, Self> {
         ImplicitStaticMember {
             OneOf {
@@ -144,7 +144,7 @@ extension VerticalDirection.Set: ParseableModifierValue {
 
 #if os(macOS)
 @available(macOS 15.0, *)
-extension FrameResizeDirection.Set: @retroactive ParseableModifierValue {
+extension FrameResizeDirection.Set: ParseableModifierValue {
     public static func parser(in context: ParseableModifierContext) -> some Parser<Substring.UTF8View, Self> {
         OneOf {
             Array<Self.Element>.parser(in: context).map({ Self.init($0) })

Sources/LiveViewNative/Views/Controls and Indicators/Indicators/ContentUnavailableView.swift

@@ -0,0 +1,104 @@
+//
+//  ContentUnavailableView.swift
+//  LiveViewNative
+//
+//  Created by Carson Katri on 11/12/24.
+//
+
+import SwiftUI
+
+/// An interface that indicates content is missing or unavailable.
+///
+/// ```html
+/// <ContentUnavailableView>
+///     <Label systemImage="tray.fill">No Mail</Label>
+///
+///     <Text template="description">
+///         New mails you receive will appear here.
+///     </Text>
+///
+///     <Group template="actions">
+///         <Button phx-click="refresh">Check Again</Button>
+///     </Group>
+/// </ContentUnavailableView>
+/// ```
+///
+/// You can also create a default `search` view:
+///
+/// ```html
+/// <ContentUnavailableView search />
+/// ```
+///
+/// Optionally `search` to the search query string:
+///
+/// ```html
+/// <ContentUnavailableView search={@query} />
+/// ```
+///
+/// ## Attributes
+/// * ``search``
+/// * ``image``
+/// * ``systemImage``
+/// * ``description``
+///
+/// ## Children
+/// * `label` - Describes the current value.
+/// * `description` - Describes the current value.
+/// * `actions` - Describes the current value.
+@_documentation(visibility: public)
+@LiveElement
+struct ContentUnavailableView<Root: RootRegistry>: View {
+    /// The search query string.
+    @_documentation(visibility: public)
+    private var search: String?
+
+    /// An image to use for the label.
+    @_documentation(visibility: public)
+    private var image: String?
+
+    /// A system image to use for the label.
+    @_documentation(visibility: public)
+    private var systemImage: String?
+
+    /// A description of the unavailable content.
+    @_documentation(visibility: public)
+    private var description: String?
+
+    public var body: some View {
+        if #available(iOS 17.0, macOS 14.0, tvOS 17.0, watchOS 10.0, *) {
+            if let search {
+                if search.isEmpty {
+                    SwiftUI.ContentUnavailableView.search
+                } else {
+                    SwiftUI.ContentUnavailableView.search(text: search)
+                }
+            } else {
+                SwiftUI.ContentUnavailableView {
+                    if let image {
+                        SwiftUI.Label {
+                            $liveElement.children(in: "label", default: true)
+                        } icon: {
+                            SwiftUI.Image(image)
+                        }
+                    } else if let systemImage {
+                        SwiftUI.Label {
+                            $liveElement.children(in: "label", default: true)
+                        } icon: {
+                            SwiftUI.Image(systemName: systemImage)
+                        }
+                    } else {
+                        $liveElement.children(in: "label", default: true)
+                    }
+                } description: {
+                    if let description {
+                        SwiftUI.Text(description)
+                    } else {
+                        $liveElement.children(in: "description")
+                    }
+                } actions: {
+                    $liveElement.children(in: "actions")
+                }
+            }
+        }
+    }
+}