Do not expose KeyboardManager from controller

Author: knopp

shell/platform/darwin/macos/framework/Source/FlutterKeyboardManager.h

@@ -40,12 +40,12 @@
 - (void)handleEvent:(nonnull NSEvent*)event;
 
 /**
- * The event currently being redispatched.
+ * Returns yes if is event currently being redispatched.
  *
  * In some instances (i.e. emoji shortcut) the event may be redelivered by cocoa
  * as key equivalent to FlutterTextInput, in which case it shouldn't be
  * processed again.
  */
-@property(nonatomic, nullable) NSEvent* eventBeingDispatched;
+- (BOOL)isDispatchingKeyEvent:(nonnull NSEvent*)event;
 
 @end

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

@@ -70,6 +70,8 @@ @interface FlutterKeyboardManager ()
 
 @property(nonatomic) NSMutableDictionary<NSNumber*, NSNumber*>* layoutMap;
 
+@property(nonatomic, nullable) NSEvent* eventBeingDispatched;
+
 /**
  * Add a primary responder, which asynchronously decides whether to handle an
  * event.
@@ -168,6 +170,10 @@ - (void)handleEvent:(nonnull NSEvent*)event {
   [self processNextEvent];
 }
 
+- (BOOL)isDispatchingKeyEvent:(NSEvent*)event {
+  return _eventBeingDispatched == event;
+}
+
 #pragma mark - Private
 
 - (void)processNextEvent {

shell/platform/darwin/macos/framework/Source/FlutterTextInputPlugin.mm

@@ -490,7 +490,7 @@ - (void)keyUp:(NSEvent*)event {
 }
 
 - (BOOL)performKeyEquivalent:(NSEvent*)event {
-  if (_flutterViewController.keyboardManager.eventBeingDispatched == event) {
+  if ([_flutterViewController isDispatchingKeyEvent:event]) {
     // When NSWindow is nextResponder, keyboard manager will send to it
     // unhandled events (through [NSWindow keyDown:]). If event has has both
     // control and cmd modifiers set (i.e. cmd+control+space - emoji picker)

shell/platform/darwin/macos/framework/Source/FlutterTextInputPluginTest.mm

@@ -865,12 +865,14 @@ - (bool)testComposingWithDeltasWhenSelectionIsActive {
 
 - (bool)testPerformKeyEquivalent {
   __block NSEvent* eventBeingDispatchedByKeyboardManager = nil;
-  id keyboardManagerMock = OCMClassMock([FlutterKeyboardManager class]);
-  OCMStub([keyboardManagerMock eventBeingDispatched]).andDo(^(NSInvocation* invocation) {
-    [invocation setReturnValue:&eventBeingDispatchedByKeyboardManager];
-  });
   FlutterViewController* viewControllerMock = OCMClassMock([FlutterViewController class]);
-  OCMStub([viewControllerMock keyboardManager]).andReturn(keyboardManagerMock);
+  OCMStub([viewControllerMock isDispatchingKeyEvent:[OCMArg any]])
+      .andDo(^(NSInvocation* invocation) {
+        NSEvent* event;
+        [invocation getArgument:(void*)&event atIndex:2];
+        BOOL result = event == eventBeingDispatchedByKeyboardManager;
+        [invocation setReturnValue:&result];
+      });
 
   NSEvent* event = [NSEvent keyEventWithType:NSEventTypeKeyDown
                                     location:NSZeroPoint

shell/platform/darwin/macos/framework/Source/FlutterViewController.mm

@@ -176,6 +176,13 @@ @interface FlutterViewController () <FlutterViewReshapeListener>
  */
 @property(nonatomic) id keyUpMonitor;
 
+/**
+ * Pointer to a keyboard manager, a hub that manages how key events are
+ * dispatched to various Flutter key responders, and whether the event is
+ * propagated to the next NSResponder.
+ */
+@property(nonatomic, readonly, nonnull) FlutterKeyboardManager* keyboardManager;
+
 @property(nonatomic) KeyboardLayoutNotifier keyboardLayoutNotifier;
 
 @property(nonatomic) NSData* keyboardLayoutData;
@@ -334,6 +341,10 @@ - (instancetype)initWithEngine:(nonnull FlutterEngine*)engine
   return self;
 }
 
+- (BOOL)isDispatchingKeyEvent:(NSEvent*)event {
+  return [_keyboardManager isDispatchingKeyEvent:event];
+}
+
 - (void)loadView {
   FlutterView* flutterView;
   if ([FlutterRenderingBackend renderUsingMetal]) {

shell/platform/darwin/macos/framework/Source/FlutterViewController_Internal.h

@@ -19,13 +19,6 @@
  */
 @property(nonatomic, readonly, nonnull) FlutterTextInputPlugin* textInputPlugin;
 
-/**
- * Pointer to a keyboard manager, a hub that manages how key events are
- * dispatched to various Flutter key responders, and whether the event is
- * propagated to the next NSResponder.
- */
-@property(nonatomic, readonly, nonnull) FlutterKeyboardManager* keyboardManager;
-
 /**
  * Initializes this FlutterViewController with the specified `FlutterEngine`.
  *
@@ -39,6 +32,11 @@
                                nibName:(nullable NSString*)nibName
                                 bundle:(nullable NSBundle*)nibBundle NS_DESIGNATED_INITIALIZER;
 
+/**
+ * Returns YES if provided event is being currently redispatched by keyboard manager.
+ */
+- (BOOL)isDispatchingKeyEvent:(nonnull NSEvent*)event;
+
 @end
 
 // Private methods made visible for testing