Merge pull request #43556 from naithar/feature/pluggable_app_delegates

[4.0] [iOS] Pluggable application delegate

4 files changed, 542 insertions, 2 deletions

diff --git a/platform/iphone/SCsub b/platform/iphone/SCsub
index d289e3a16f..ee7b2f4ab5 100644
--- a/platform/iphone/SCsub
+++ b/platform/iphone/SCsub
@@ -14,6 +14,7 @@ iphone_lib = [
     "joypad_iphone.mm",
     "godot_view.mm",
     "display_layer.mm",
+    "godot_app_delegate.m",
     "godot_view_renderer.mm",
     "godot_view_gesture_recognizer.mm",
     "device_metrics.m",
diff --git a/platform/iphone/godot_app_delegate.h b/platform/iphone/godot_app_delegate.h
new file mode 100644
index 0000000000..ebb21c499b
--- /dev/null
+++ b/platform/iphone/godot_app_delegate.h
@@ -0,0 +1,41 @@
+/*************************************************************************/
+/*  godot_app_delegate.h                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#import <UIKit/UIKit.h>
+
+typedef NSObject<UIApplicationDelegate> ApplicationDelegateService;
+
+@interface GodotApplicalitionDelegate : NSObject <UIApplicationDelegate>
+
+@property(class, readonly, strong) NSArray<ApplicationDelegateService *> *services;
+
++ (void)addService:(ApplicationDelegateService *)service;
+
+@end
diff --git a/platform/iphone/godot_app_delegate.m b/platform/iphone/godot_app_delegate.m
new file mode 100644
index 0000000000..a5aad26bd5
--- /dev/null
+++ b/platform/iphone/godot_app_delegate.m
@@ -0,0 +1,497 @@
+/*************************************************************************/
+/*  godot_app_delegate.m                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#import "godot_app_delegate.h"
+
+#import "app_delegate.h"
+
+@interface GodotApplicalitionDelegate ()
+
+@end
+
+@implementation GodotApplicalitionDelegate
+
+static NSMutableArray<ApplicationDelegateService *> *services = nil;
+
++ (NSArray<ApplicationDelegateService *> *)services {
+	return services;
+}
+
++ (void)load {
+	services = [NSMutableArray new];
+	[services addObject:[AppDelegate new]];
+}
+
++ (void)addService:(ApplicationDelegateService *)service {
+	if (!services || !service) {
+		return;
+	}
+	[services addObject:service];
+}
+
+// UIApplicationDelegate documantation can be found here: https://developer.apple.com/documentation/uikit/uiapplicationdelegate
+
+// MARK: Window
+
+- (UIWindow *)window {
+	UIWindow *result = nil;
+
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		UIWindow *value = [service window];
+
+		if (value) {
+			result = value;
+		}
+	}
+
+	return result;
+}
+
+// MARK: Initializing
+
+- (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(NSDictionary<UIApplicationLaunchOptionsKey, id> *)launchOptions {
+	BOOL result = NO;
+
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		if ([service application:application willFinishLaunchingWithOptions:launchOptions]) {
+			result = YES;
+		}
+	}
+
+	return result;
+}
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary<UIApplicationLaunchOptionsKey, id> *)launchOptions {
+	BOOL result = NO;
+
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		if ([service application:application didFinishLaunchingWithOptions:launchOptions]) {
+			result = YES;
+		}
+	}
+
+	return result;
+}
+
+/* Can be handled by Info.plist. Not yet supported by Godot.
+
+// MARK: Scene
+
+- (UISceneConfiguration *)application:(UIApplication *)application configurationForConnectingSceneSession:(UISceneSession *)connectingSceneSession options:(UISceneConnectionOptions *)options {}
+
+- (void)application:(UIApplication *)application didDiscardSceneSessions:(NSSet<UISceneSession *> *)sceneSessions {}
+
+*/
+
+// MARK: Life-Cycle
+
+- (void)applicationDidBecomeActive:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationDidBecomeActive:application];
+	}
+}
+
+- (void)applicationWillResignActive:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationWillResignActive:application];
+	}
+}
+
+- (void)applicationDidEnterBackground:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationDidEnterBackground:application];
+	}
+}
+
+- (void)applicationWillEnterForeground:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationWillEnterForeground:application];
+	}
+}
+
+- (void)applicationWillTerminate:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationWillTerminate:application];
+	}
+}
+
+// MARK: Environment Changes
+
+- (void)applicationProtectedDataDidBecomeAvailable:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationProtectedDataDidBecomeAvailable:application];
+	}
+}
+
+- (void)applicationProtectedDataWillBecomeUnavailable:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationProtectedDataWillBecomeUnavailable:application];
+	}
+}
+
+- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationDidReceiveMemoryWarning:application];
+	}
+}
+
+- (void)applicationSignificantTimeChange:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationSignificantTimeChange:application];
+	}
+}
+
+// MARK: App State Restoration
+
+- (BOOL)application:(UIApplication *)application shouldSaveSecureApplicationState:(NSCoder *)coder API_AVAILABLE(ios(13.2)) {
+	BOOL result = NO;
+
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		if ([service application:application shouldSaveSecureApplicationState:coder]) {
+			result = YES;
+		}
+	}
+
+	return result;
+}
+
+- (BOOL)application:(UIApplication *)application shouldRestoreSecureApplicationState:(NSCoder *)coder API_AVAILABLE(ios(13.2)) {
+	BOOL result = NO;
+
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		if ([service application:application shouldRestoreSecureApplicationState:coder]) {
+			result = YES;
+		}
+	}
+
+	return result;
+}
+
+- (UIViewController *)application:(UIApplication *)application viewControllerWithRestorationIdentifierPath:(NSArray<NSString *> *)identifierComponents coder:(NSCoder *)coder {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		UIViewController *controller = [service application:application viewControllerWithRestorationIdentifierPath:identifierComponents coder:coder];
+
+		if (controller) {
+			return controller;
+		}
+	}
+
+	return nil;
+}
+
+- (void)application:(UIApplication *)application willEncodeRestorableStateWithCoder:(NSCoder *)coder {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application willEncodeRestorableStateWithCoder:coder];
+	}
+}
+
+- (void)application:(UIApplication *)application didDecodeRestorableStateWithCoder:(NSCoder *)coder {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application didDecodeRestorableStateWithCoder:coder];
+	}
+}
+
+// MARK: Download Data in Background
+
+- (void)application:(UIApplication *)application handleEventsForBackgroundURLSession:(NSString *)identifier completionHandler:(void (^)(void))completionHandler {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application handleEventsForBackgroundURLSession:identifier completionHandler:completionHandler];
+	}
+
+	completionHandler();
+}
+
+// MARK: Remote Notification
+
+- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
+	}
+}
+
+- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application didFailToRegisterForRemoteNotificationsWithError:error];
+	}
+}
+
+- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:completionHandler];
+	}
+
+	completionHandler(UIBackgroundFetchResultNoData);
+}
+
+// MARK: User Activity and Handling Quick Actions
+
+- (BOOL)application:(UIApplication *)application willContinueUserActivityWithType:(NSString *)userActivityType {
+	BOOL result = NO;
+
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		if ([service application:application willContinueUserActivityWithType:userActivityType]) {
+			result = YES;
+		}
+	}
+
+	return result;
+}
+
+- (BOOL)application:(UIApplication *)application continueUserActivity:(NSUserActivity *)userActivity restorationHandler:(void (^)(NSArray<id<UIUserActivityRestoring>> *restorableObjects))restorationHandler {
+	BOOL result = NO;
+
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		if ([service application:application continueUserActivity:userActivity restorationHandler:restorationHandler]) {
+			result = YES;
+		}
+	}
+
+	return result;
+}
+
+- (void)application:(UIApplication *)application didUpdateUserActivity:(NSUserActivity *)userActivity {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application didUpdateUserActivity:userActivity];
+	}
+}
+
+- (void)application:(UIApplication *)application didFailToContinueUserActivityWithType:(NSString *)userActivityType error:(NSError *)error {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application didFailToContinueUserActivityWithType:userActivityType error:error];
+	}
+}
+
+- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL succeeded))completionHandler {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application performActionForShortcutItem:shortcutItem completionHandler:completionHandler];
+	}
+}
+
+// MARK: WatchKit
+
+- (void)application:(UIApplication *)application handleWatchKitExtensionRequest:(NSDictionary *)userInfo reply:(void (^)(NSDictionary *replyInfo))reply {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application handleWatchKitExtensionRequest:userInfo reply:reply];
+	}
+}
+
+// MARK: HealthKit
+
+- (void)applicationShouldRequestHealthAuthorization:(UIApplication *)application {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service applicationShouldRequestHealthAuthorization:application];
+	}
+}
+
+// MARK: Opening an URL
+
+- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey, id> *)options {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		if ([service application:app openURL:url options:options]) {
+			return YES;
+		}
+	}
+
+	return NO;
+}
+
+// MARK: Disallowing Specified App Extension Types
+
+- (BOOL)application:(UIApplication *)application shouldAllowExtensionPointIdentifier:(UIApplicationExtensionPointIdentifier)extensionPointIdentifier {
+	BOOL result = NO;
+
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		if ([service application:application shouldAllowExtensionPointIdentifier:extensionPointIdentifier]) {
+			result = YES;
+		}
+	}
+
+	return result;
+}
+
+// MARK: SiriKit
+
+- (id)application:(UIApplication *)application handlerForIntent:(INIntent *)intent API_AVAILABLE(ios(14.0)) {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		id result = [service application:application handlerForIntent:intent];
+
+		if (result) {
+			return result;
+		}
+	}
+
+	return nil;
+}
+
+// MARK: CloudKit
+
+- (void)application:(UIApplication *)application userDidAcceptCloudKitShareWithMetadata:(CKShareMetadata *)cloudKitShareMetadata {
+	for (ApplicationDelegateService *service in services) {
+		if (![service respondsToSelector:_cmd]) {
+			continue;
+		}
+
+		[service application:application userDidAcceptCloudKitShareWithMetadata:cloudKitShareMetadata];
+	}
+}
+
+/* Handled By Info.plist file for now
+
+// MARK: Interface Geometry
+
+- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {}
+
+*/
+
+@end
diff --git a/platform/iphone/main.m b/platform/iphone/main.m
index c292f02822..351b40a881 100644
--- a/platform/iphone/main.m
+++ b/platform/iphone/main.m
@@ -28,7 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
-#import "app_delegate.h"
+#import "godot_app_delegate.h"
 
 #import <UIKit/UIKit.h>
 #include <stdio.h>
@@ -49,7 +49,8 @@ int main(int argc, char *argv[]) {
 
 	printf("running app main\n");
 	@autoreleasepool {
-		UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
+		NSString *className = NSStringFromClass([GodotApplicalitionDelegate class]);
+		UIApplicationMain(argc, argv, nil, className);
 	}
 	printf("main done\n");
 	return 0;