Migrate FlutterCallbackCache and FlutterKeyboardManager to ARC

Author: jmagman

shell/platform/darwin/ios/BUILD.gn

@@ -59,6 +59,10 @@ source_set("flutter_framework_source_arc") {
   public_configs = [ "//flutter:config" ]
 
   sources = [
+    "framework/Source/FlutterCallbackCache.mm",
+    "framework/Source/FlutterCallbackCache_Internal.h",
+    "framework/Source/FlutterKeyboardManager.h",
+    "framework/Source/FlutterKeyboardManager.mm",
     "framework/Source/FlutterMetalLayer.h",
     "framework/Source/FlutterMetalLayer.mm",
     "framework/Source/FlutterTextInputDelegate.h",
@@ -84,8 +88,6 @@ source_set("flutter_framework_source") {
     # New files are highly encouraged to be in ARC.
     # To add new files in ARC, add them to the `flutter_framework_source_arc` target.
     "framework/Source/FlutterAppDelegate.mm",
-    "framework/Source/FlutterCallbackCache.mm",
-    "framework/Source/FlutterCallbackCache_Internal.h",
     "framework/Source/FlutterChannelKeyResponder.h",
     "framework/Source/FlutterChannelKeyResponder.mm",
     "framework/Source/FlutterDartProject.mm",
@@ -100,8 +102,6 @@ source_set("flutter_framework_source") {
     "framework/Source/FlutterHeadlessDartRunner.mm",
     "framework/Source/FlutterKeyPrimaryResponder.h",
     "framework/Source/FlutterKeySecondaryResponder.h",
-    "framework/Source/FlutterKeyboardManager.h",
-    "framework/Source/FlutterKeyboardManager.mm",
     "framework/Source/FlutterOverlayView.h",
     "framework/Source/FlutterOverlayView.mm",
     "framework/Source/FlutterPlatformPlugin.h",

shell/platform/darwin/ios/framework/Source/FlutterCallbackCache.mm

@@ -7,15 +7,9 @@
 #include "flutter/fml/logging.h"
 #include "flutter/lib/ui/plugins/callback_cache.h"
 
-@implementation FlutterCallbackInformation
-
-- (void)dealloc {
-  [_callbackName release];
-  [_callbackClassName release];
-  [_callbackLibraryPath release];
-  [super dealloc];
-}
+FLUTTER_ASSERT_ARC
 
+@implementation FlutterCallbackInformation
 @end
 
 @implementation FlutterCallbackCache
@@ -25,7 +19,7 @@ + (FlutterCallbackInformation*)lookupCallbackInformation:(int64_t)handle {
   if (info == nullptr) {
     return nil;
   }
-  FlutterCallbackInformation* new_info = [[[FlutterCallbackInformation alloc] init] autorelease];
+  FlutterCallbackInformation* new_info = [[FlutterCallbackInformation alloc] init];
   new_info.callbackName = [NSString stringWithUTF8String:info->name.c_str()];
   new_info.callbackClassName = [NSString stringWithUTF8String:info->class_name.c_str()];
   new_info.callbackLibraryPath = [NSString stringWithUTF8String:info->library_path.c_str()];

shell/platform/darwin/ios/framework/Source/FlutterKeyboardManager.mm

@@ -3,8 +3,11 @@
 // found in the LICENSE file.
 
 #import "flutter/shell/platform/darwin/ios/framework/Source/FlutterKeyboardManager.h"
+
 #include "flutter/fml/platform/darwin/message_loop_darwin.h"
-#include "flutter/fml/platform/darwin/weak_nsobject.h"
+#import "flutter/shell/platform/darwin/common/framework/Headers/FlutterMacros.h"
+
+FLUTTER_ASSERT_ARC
 
 static constexpr CFTimeInterval kDistantFuture = 1.0e10;
 
@@ -28,16 +31,13 @@ - (void)dispatchToSecondaryResponders:(nonnull FlutterUIPressProxy*)press
 
 @end
 
-@implementation FlutterKeyboardManager {
-  std::unique_ptr<fml::WeakNSObjectFactory<FlutterKeyboardManager>> _weakFactory;
-}
+@implementation FlutterKeyboardManager
 
 - (nonnull instancetype)init {
   self = [super init];
   if (self != nil) {
     _primaryResponders = [[NSMutableArray alloc] init];
     _secondaryResponders = [[NSMutableArray alloc] init];
-    _weakFactory = std::make_unique<fml::WeakNSObjectFactory<FlutterKeyboardManager>>(self);
   }
   return self;
 }
@@ -51,21 +51,8 @@ - (void)addSecondaryResponder:(nonnull id<FlutterKeySecondaryResponder>)responde
 }
 
 - (void)dealloc {
-  // It will be destroyed and invalidate its weak pointers
-  // before any other members are destroyed.
-  _weakFactory.reset();
-
   [_primaryResponders removeAllObjects];
   [_secondaryResponders removeAllObjects];
-  [_primaryResponders release];
-  [_secondaryResponders release];
-  _primaryResponders = nil;
-  _secondaryResponders = nil;
-  [super dealloc];
-}
-
-- (fml::WeakNSObject<FlutterKeyboardManager>)getWeakNSObject {
-  return _weakFactory->GetWeakNSObject();
 }
 
 - (void)handlePress:(nonnull FlutterUIPressProxy*)press
@@ -89,7 +76,7 @@ - (void)handlePress:(nonnull FlutterUIPressProxy*)press
       // encounter.
       NSAssert([_primaryResponders count] >= 0, @"At least one primary responder must be added.");
 
-      __block auto weakSelf = [self getWeakNSObject];
+      __block __weak __typeof(self) weakSelf = self;
       __block NSUInteger unreplied = [self.primaryResponders count];
       __block BOOL anyHandled = false;
       FlutterAsyncKeyCallback replyCallback = ^(BOOL handled) {
@@ -98,7 +85,7 @@ - (void)handlePress:(nonnull FlutterUIPressProxy*)press
         anyHandled = anyHandled || handled;
         if (unreplied == 0) {
           if (!anyHandled && weakSelf) {
-            [weakSelf.get() dispatchToSecondaryResponders:press complete:completeCallback];
+            [weakSelf dispatchToSecondaryResponders:press complete:completeCallback];
           } else {
             completeCallback(true, press);
           }