[webview_flutter_wkwebview] Adds the dispose method to NSObjectFlutterApi (flutter#5970)

Author: bparrishMines

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFGeneratedWebKitApis.h

@@ -451,6 +451,8 @@ NSObject<FlutterMessageCodec> *FWFNSObjectFlutterApiGetCodec(void);
                                  changeKeys:(NSArray<FWFNSKeyValueChangeKeyEnumData *> *)changeKeys
                                changeValues:(NSArray<id> *)changeValues
                                  completion:(void (^)(NSError *_Nullable))completion;
+- (void)disposeObjectWithIdentifier:(NSNumber *)identifier
+                         completion:(void (^)(NSError *_Nullable))completion;
 @end
 /// The codec used by FWFWKWebViewHostApi.
 NSObject<FlutterMessageCodec> *FWFWKWebViewHostApiGetCodec(void);

packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFGeneratedWebKitApis.m

@@ -1989,6 +1989,17 @@ - (void)observeValueForObjectWithIdentifier:(NSNumber *)arg_identifier
                    completion(nil);
                  }];
 }
+- (void)disposeObjectWithIdentifier:(NSNumber *)arg_identifier
+                         completion:(void (^)(NSError *_Nullable))completion {
+  FlutterBasicMessageChannel *channel = [FlutterBasicMessageChannel
+      messageChannelWithName:@"dev.flutter.pigeon.NSObjectFlutterApi.dispose"
+             binaryMessenger:self.binaryMessenger
+                       codec:FWFNSObjectFlutterApiGetCodec()];
+  [channel sendMessage:@[ arg_identifier ?: [NSNull null] ]
+                 reply:^(id reply) {
+                   completion(nil);
+                 }];
+}
 @end
 @interface FWFWKWebViewHostApiCodecReader : FlutterStandardReader
 @end

packages/webview_flutter/webview_flutter_wkwebview/lib/src/common/web_kit.pigeon.dart

@@ -1770,6 +1770,7 @@ abstract class NSObjectFlutterApi {
       int objectIdentifier,
       List<NSKeyValueChangeKeyEnumData?> changeKeys,
       List<Object?> changeValues);
+  void dispose(int identifier);
   static void setup(NSObjectFlutterApi? api,
       {BinaryMessenger? binaryMessenger}) {
     {
@@ -1806,6 +1807,25 @@ abstract class NSObjectFlutterApi {
         });
       }
     }
+    {
+      final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
+          'dev.flutter.pigeon.NSObjectFlutterApi.dispose', codec,
+          binaryMessenger: binaryMessenger);
+      if (api == null) {
+        channel.setMessageHandler(null);
+      } else {
+        channel.setMessageHandler((Object? message) async {
+          assert(message != null,
+              'Argument for dev.flutter.pigeon.NSObjectFlutterApi.dispose was null.');
+          final List<Object?> args = (message as List<Object?>?)!;
+          final int? arg_identifier = (args[0] as int?);
+          assert(arg_identifier != null,
+              'Argument for dev.flutter.pigeon.NSObjectFlutterApi.dispose was null, expected non-null int.');
+          api.dispose(arg_identifier!);
+          return;
+        });
+      }
+    }
   }
 }
 

packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation_api_impls.dart

@@ -183,4 +183,9 @@ class NSObjectFlutterApiImpl extends NSObjectFlutterApi {
       ), changeValues),
     );
   }
+
+  @override
+  void dispose(int identifier) {
+    instanceManager.remove(identifier);
+  }
 }

packages/webview_flutter/webview_flutter_wkwebview/pigeons/web_kit.dart

@@ -510,6 +510,9 @@ abstract class NSObjectFlutterApi {
     List<NSKeyValueChangeKeyEnumData?> changeKeys,
     List<Object?> changeValues,
   );
+
+  @ObjCSelector('disposeObjectWithIdentifier:')
+  void dispose(int identifier);
 }
 
 /// Mirror of WKWebView.

packages/webview_flutter/webview_flutter_wkwebview/test/src/foundation/foundation_test.dart

@@ -90,7 +90,7 @@ void main() {
         ));
       });
 
-      test('dispose', () async {
+      test('NSObjectHostApi.dispose', () async {
         int? callbackIdentifier;
         final InstanceManager instanceManager =
             InstanceManager(onWeakReferenceRemoved: (int identifier) {
@@ -145,6 +145,20 @@ void main() {
           ]),
         );
       });
+
+      test('NSObjectFlutterApi.dispose', () {
+        FoundationFlutterApis.instance = FoundationFlutterApis(
+          instanceManager: instanceManager,
+        );
+
+        object = NSObject(instanceManager: instanceManager);
+        instanceManager.addHostCreatedInstance(object, 1);
+
+        instanceManager.removeWeakReference(object);
+        FoundationFlutterApis.instance.object.dispose(1);
+
+        expect(instanceManager.containsIdentifier(1), isFalse);
+      });
     });
   });
 }