Support #Preview parsing (iOS 17+ only)

Development/Demo/MyBook.swift

@@ -135,6 +135,114 @@ let myBook = Book.init(
   }
 )
 
+#Preview("Simple Sample") {
+  Text("Yo there!")
+    .foregroundStyle(Color.green)
+}
+
+struct StorybookTrait: PreviewModifier {
+  func body(content: Content, context: Void) -> some View {
+    content
+  }
+}
+
+@available(iOS 18.0, *)
+extension PreviewTrait where T == Preview.ViewTraits {
+
+  @MainActor public static var storybook: PreviewTrait<Preview.ViewTraits> {
+    return .init(.modifier(StorybookTrait()))
+  }
+}
+
+struct Storybook: View {
+
+  let content: AnyView
+  init<Content: View>(
+    @ViewBuilder content: () -> Content
+  ) {
+    self.content = .init(content())
+  }
+
+  var body: some View {
+    content
+  }
+}
+
+@available(iOS 18.0, *)
+#Preview(traits: .storybook) {
+  Text("My Component")
+}
+
+#Preview {
+  Text("My Component")
+}
+
+#Preview {
+  Text("NO TITLE!")
+    .foregroundStyle(Color.purple)
+}
+
+@available(iOS 17.0, *)
+#Preview("States Sample") {
+  @Previewable @State var state: Int = 1
+
+  VStack {
+    Text("Aloha \(state)")
+    Button(
+      action: { state += 1 },
+      label: { Text("+") }
+    )
+  }
+}
+
+@available(iOS 17.0, *)
+#Preview("UIView Sample") {
+  {
+    var state: Int = 1
+
+    let label = UILabel()
+    label.text = "Test \(state)"
+
+    let button = UIButton(
+      configuration: .bordered(),
+      primaryAction: .init { _ in
+        state += 1
+        label.text = "Test \(state)"
+      }
+    )
+    button.setTitle("+", for: .normal)
+    let stack = UIStackView(arrangedSubviews: [label, button])
+    stack.spacing = 8
+    return stack
+  }()
+}
+
+@available(iOS 17.0, *)
+#Preview("UIViewController Sample") {
+  {
+    let controller = UIViewController()
+    controller.view.backgroundColor = .systemMint
+    var state: Int = 1
+
+    let label = UILabel()
+    label.text = "Test \(state)"
+
+    let button = UIButton(
+      configuration: .bordered(),
+      primaryAction: .init { _ in
+        state += 1
+        label.text = "Test \(state)"
+      }
+    )
+    button.setTitle("+", for: .normal)
+    let stack = UIStackView(arrangedSubviews: [label, button])
+    stack.spacing = 8
+    stack.frame = controller.view.bounds
+    controller.view.addSubview(stack)
+    return controller
+  }()
+}
+
 #StorybookPage(title: "UILabel updating text") {
   BookPreview { context in
     let label = UILabel()
@@ -201,10 +309,10 @@ let myBook = Book.init(
   }
 }
 
-#Preview("Some title 2") {
+#Preview("Title") {
   #StorybookPreview<MyLabel> {
     BookPreview { _ in
-      MyLabel(title: "MyLabel 2")
+      MyLabel(title: "Test")
     }
   }
 }
@@ -213,9 +321,6 @@ let myBook = Book.init(
   BookPreview { _ in
     MyLabel(title: "Test")
   }
-  BookPreview { _ in
-    MyLabel(title: "Test")
-  }
 }
 
 #StorybookPage<MyLabel> {

Development/Demo/RootView.swift

@@ -37,6 +37,14 @@ struct RootView: View {
             Book.allStorybookPages()
               .map({ $0.bookBody })
           }
+
+          if #available(iOS 17.0, *) {
+            if let nodes = Book.allBookPreviews() {
+              Book(title: "#Preview macro") {
+                nodes
+              }
+            }
+          }
         }
       )
     )

Development/Storybook.xcodeproj/project.pbxproj

@@ -324,7 +324,7 @@
 				CODE_SIGN_STYLE = Manual;
 				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = Demo/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -344,7 +344,7 @@
 				CODE_SIGN_STYLE = Manual;
 				DEVELOPMENT_TEAM = "";
 				INFOPLIST_FILE = Demo/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",

Development/Storybook.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -1,4 +1,5 @@
 {
+  "originHash" : "f5a894bbdc3287a91c8c33f864cfb447314305f7fc66cabf1c369e8c3a67521d",
   "pins" : [
     {
       "identity" : "descriptors",
@@ -32,26 +33,26 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-macro-testing.git",
       "state" : {
-        "branch" : "main",
-        "revision" : "15916c0c328339f54c15d616465d79700e3f7de8"
+        "revision" : "20c1a8f3b624fb5d1503eadcaa84743050c350f4",
+        "version" : "0.5.2"
       }
     },
     {
       "identity" : "swift-snapshot-testing",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-snapshot-testing",
       "state" : {
-        "revision" : "e7b77228b34057041374ebef00c0fd7739d71a2b",
-        "version" : "1.15.3"
+        "revision" : "7b0bbbae90c41f848f90ac7b4df6c4f50068256d",
+        "version" : "1.17.5"
       }
     },
     {
       "identity" : "swift-syntax",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/swift-syntax.git",
       "state" : {
-        "revision" : "64889f0c732f210a935a0ad7cda38f77f876262d",
-        "version" : "509.1.1"
+        "revision" : "0687f71944021d616d34d922343dcef086855920",
+        "version" : "600.0.1"
       }
     },
     {
@@ -86,19 +87,19 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/FluidGroup/TextureBridging.git",
       "state" : {
-        "branch" : "main",
-        "revision" : "4383f8a9846a0507d2c22ee9fac22153f9b86fed"
+        "revision" : "4383f8a9846a0507d2c22ee9fac22153f9b86fed",
+        "version" : "3.2.1"
       }
     },
     {
       "identity" : "textureswiftsupport",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/FluidGroup/TextureSwiftSupport.git",
       "state" : {
-        "branch" : "main",
-        "revision" : "5bae50cab3798dccb8b98c3ffbc70320ae66b45a"
+        "revision" : "fb748d6a9d0a2dca0635227e1db0360fd26e0e24",
+        "version" : "3.20.1"
       }
     }
   ],
-  "version" : 2
+  "version" : 3
 }