[Feature] Add iOS App lifecycle basic support

Example/Example.xcodeproj/project.pbxproj

@@ -318,7 +318,7 @@
 					};
 					279283B82DFF11CE00234D64 = {
 						CreatedOnToolsVersion = 16.3;
-						TestTargetID = 27D49DF72BA604FB00F6E2E2;
+						TestTargetID = 275751E22DEE1441003E467C;
 					};
 					27CD0B482AFC8D37003665EB = {
 						CreatedOnToolsVersion = 15.0;
@@ -1116,7 +1116,7 @@
 				SUPPORTS_MACCATALYST = NO;
 				SWIFT_EMIT_LOC_STRINGS = NO;
 				TARGETED_DEVICE_FAMILY = "1,2,7";
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/HostingExample.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/HostingExample";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/TestingHost.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/TestingHost";
 			};
 			name = SwiftUIDebug;
 		};
@@ -1138,7 +1138,7 @@
 				SUPPORTS_MACCATALYST = NO;
 				SWIFT_EMIT_LOC_STRINGS = NO;
 				TARGETED_DEVICE_FAMILY = "1,2,7";
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/HostingExample.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/HostingExample";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/TestingHost.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/TestingHost";
 			};
 			name = SwiftUIRelease;
 		};
@@ -1160,7 +1160,7 @@
 				SUPPORTS_MACCATALYST = NO;
 				SWIFT_EMIT_LOC_STRINGS = NO;
 				TARGETED_DEVICE_FAMILY = "1,2,7";
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/HostingExample.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/HostingExample";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/TestingHost.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/TestingHost";
 			};
 			name = OpenSwiftUIDebug;
 		};
@@ -1182,7 +1182,7 @@
 				SUPPORTS_MACCATALYST = NO;
 				SWIFT_EMIT_LOC_STRINGS = NO;
 				TARGETED_DEVICE_FAMILY = "1,2,7";
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/HostingExample.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/HostingExample";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/TestingHost.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/TestingHost";
 			};
 			name = OpenSwiftUIRelease;
 		};

Sources/COpenSwiftUI/Shims/UIKit/UIKit_Private.h

@@ -30,6 +30,8 @@ OPENSWIFTUI_ASSUME_NONNULL_BEGIN
 - (nullable NSString *)_launchTestName_openswiftui_safe_wrapper OPENSWIFTUI_SWIFT_NAME(_launchTestName());
 
 - (void)_performBlockAfterCATransactionCommits_openswiftui_safe_wrapper:(void (^)(void))block OPENSWIFTUI_SWIFT_NAME(_performBlockAfterCATransactionCommits(_:));
+
+- (void)_saveRestorationUserActivityStateForScene_openswiftui_safe_wrapper:(UIScene *)scene OPENSWIFTUI_SWIFT_NAME(_saveRestorationUserActivityState(forScene:));
 @end
 
 @interface UIView (OpenSwiftUI_SPI)
@@ -92,6 +94,10 @@ OPENSWIFTUI_ASSUME_NONNULL_BEGIN
 @end
 #endif
 
+@interface UISceneConfiguration (OpenSwiftUI_SPI)
+@property (nonatomic, readonly, nullable) id<UISceneDelegate> sceneDelegate;
+@end
+
 OPENSWIFTUI_EXPORT
 bool UIViewIgnoresTouchEvents(UIView *view);
 

Sources/COpenSwiftUI/Shims/UIKit/UIKit_Private.m

@@ -36,6 +36,11 @@ - (NSString *)_launchTestName_openswiftui_safe_wrapper {
     OPENSWIFTUI_SAFE_WRAPPER_IMP(NSString *, @"_launchTestName", nil);
     return func(self, selector);
 }
+
+- (void)_saveRestorationUserActivityStateForScene_openswiftui_safe_wrapper:(UIScene *)scene {
+    OPENSWIFTUI_SAFE_WRAPPER_IMP(void, @"_saveRestorationUserActivityStateForScene:", , UIScene *);
+    func(self, selector, scene);
+}
 @end
 
 @implementation UIView (OpenSwiftUI_SPI)

Sources/COpenSwiftUI/Shims/UserActivity/UserActivity_Private.h

@@ -0,0 +1,27 @@
+//
+//  UserActivity_Private.h
+//  COpenSwiftUI
+//
+//  Audited for 6.5.4
+//  Status: Complete
+
+#ifndef UserActivity_Private_h
+#define UserActivity_Private_h
+
+#include "OpenSwiftUIBase.h"
+
+#if OPENSWIFTUI_TARGET_OS_DARWIN
+
+#import <Foundation/Foundation.h>
+
+OPENSWIFTUI_ASSUME_NONNULL_BEGIN
+
+@interface NSUserActivity (OpenSwiftUI_SPI)
+@property (nonatomic, readonly) BOOL _isUniversalLink;
+@end
+
+OPENSWIFTUI_ASSUME_NONNULL_END
+
+#endif /* OPENSWIFTUI_TARGET_OS_DARWIN */
+
+#endif /* UserActivity_Private_h */

Sources/OpenSwiftUI/App/App/AppGraph.swift

@@ -14,7 +14,8 @@ import Glibc
 import WASILibc
 #endif
 import OpenAttributeGraphShims
-@_spi(ForOpenSwiftUIOnly) package import OpenSwiftUICore
+@_spi(ForOpenSwiftUIOnly)
+package import OpenSwiftUICore
 
 package final class AppGraph: GraphHost {
     static var shared: AppGraph? = nil {
@@ -170,10 +171,55 @@ extension AppGraph {
     }
 }
 
+// MARK: - AppGreaph + GraphDelegate
+
+extension AppGraph: GraphDelegate {
+    package func updateGraph<T>(body: (GraphHost) -> T) -> T {
+        body(self)
+    }
+
+    package func graphDidChange() {
+        data.updateSeed &+= 1
+        runTransaction()
+        let phaseChanged = $rootScenePhase.changedValue().changed
+        let commandsChanged = $rootCommandsList?.changedValue().changed ?? false
+        // TODO: notifyObservers
+        _openSwiftUIUnimplementedWarning()
+    }
+
+    package func preferencesDidChange() {
+        _openSwiftUIEmptyStub()
+    }
+}
+
+extension AppGraph {
+    func addObserver(_ observer: some AppGraphObserver) {
+        observers = observers.filter { $0.base != nil }
+        observers.insert(HashableWeakBox(observer))
+    }
+
+    func removeObserver(_ observer: some AppGraphObserver) {
+        observers = observers.filter { $0.base != nil }
+        observers.remove(HashableWeakBox(observer))
+    }
+
+//    func notifyObservers(phaseChanged: Bool) {
+//        for box in observers {
+//            (box.base as? AppGraphObserver)?.scenesDidChange(phaseChanged: phaseChanged)
+//        }
+//    }
+//
+//    func notifyCommandsChanged() {
+//        for box in observers {
+//            (box.base as? AppGraphObserver)?.commandsDidChange()
+//        }
+//    }
+}
+
 // MARK: - AppGraphObserver
 
 protocol AppGraphObserver: AnyObject {
-    func sceneDidChange(phaseChanged: Bool)
+    func scenesDidChange(phaseChanged: Bool)
     func commandsDidChange()
 }
 

Sources/OpenSwiftUI/App/App/AppKit/AppKitAppDelegate.swift

@@ -52,6 +52,45 @@ class AppDelegate: NSResponder, NSApplicationDelegate {
     override func forwardingTarget(for aSelector: Selector!) -> Any? {
         appDelegate
     }
+
+    func applicationWillFinishLaunching(_ notification: Notification) {
+        Update.begin()
+        defer { Update.end() }
+        // FIXME
+        let items = AppGraph.shared?.rootSceneList?.items ?? []
+        let view = items[0].value.view
+        let hostingVC = NSHostingController(rootView: view)
+        let windowVC = WindowController(hostingVC)
+        windowVC.showWindow(nil)
+    }
+}
+
+// FIXME: frame is zero
+final class WindowController<Content>: NSWindowController where Content: View {
+    init(_ hostingVC: NSHostingController<Content>) {
+        self.hostingVC = hostingVC
+        super.init(window: nil)
+    }
+
+    @available(*, unavailable)
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override var windowNibName: NSNib.Name? { "" }
+
+    let hostingVC: NSHostingController<Content>
+
+    override func loadWindow() {
+        window = NSWindow(contentRect: .init(x: 0, y: 0, width: 500, height: 300), styleMask: [.titled, .closable, .miniaturizable], backing: .buffered, defer: false)
+        window?.center()
+    }
+
+    override func windowDidLoad() {
+        super.windowDidLoad()
+        contentViewController = hostingVC
+        hostingVC.host.frame = window!.frame
+    }
 }
 
 // MARK: - App Utils