FlutterAppLifecycleRegistrar Class Reference

#include <FlutterAppLifecycleDelegate.h>

Inheritance diagram for FlutterAppLifecycleRegistrar:

Instance Methods
(void)	- addDelegate:
(void)	- removeDelegate:
(void)	- addObserverFor:selector: [implementation]
(instancetype)	- init [implementation]
(void)	- dealloc [implementation]
Instance Methods inherited from <FlutterAppLifecycleDelegate>
(void)	- handleWillFinishLaunching:
(void)	- handleDidFinishLaunching:
(void)	- handleWillBecomeActive:
(void)	- handleDidBecomeActive:
(void)	- handleWillResignActive:
(void)	- handleDidResignActive:
(void)	- handleWillHide:
(void)	- handleDidHide:
(void)	- handleWillUnhide:
(void)	- handleDidUnhide:
(void)	- handleDidChangeScreenParameters:
(void)	- handleDidChangeOcclusionState:
(BOOL)	- handleOpenURLs:
(void)	- handleWillTerminate:

Class Methods
(static BOOL)	+ IsPowerOfTwo [implementation]

Properties
NSPointerArray *	delegates [implementation]

Detailed Description

Propagates NSAppDelegate callbacks to registered delegates.

Definition at line 126 of file FlutterAppLifecycleDelegate.h.

Method Documentation

addDelegate:

- (void) addDelegate:

(NSObject<FlutterAppLifecycleDelegate>*)

delegate

Registers delegate to receive lifecycle callbacks via this FlutterAppLifecycleDelegate as long as it is alive.

delegate will only be referenced weakly.

Definition at line 72 of file FlutterAppLifecycleDelegate.mm.

                   :(NSObject<FlutterAppLifecycleDelegate>*)delegate {
  [_delegates addPointer:(__bridge void*)delegate];
  if (IsPowerOfTwo([_delegates count])) {
    [_delegates compact];
  }
}

addObserverFor:selector:

- (void) addObserverFor: (NSString*)  name selector: (SEL)  selector

implementation

Definition at line 1 of file FlutterAppLifecycleDelegate.mm.

                      :(NSString*)name selector:(SEL)selector {
  [[NSNotificationCenter defaultCenter] addObserver:self selector:selector name:name object:nil];
  __block NSObject* blockSelf = self;
  dispatch_block_t unsubscribe = ^{
    [[NSNotificationCenter defaultCenter] removeObserver:blockSelf name:name object:nil];
  };
  [_notificationUnsubscribers addObject:[unsubscribe copy]];
}

dealloc

- (void) dealloc

implementation

Definition at line 1 of file FlutterAppLifecycleDelegate.mm.

                {
  for (dispatch_block_t unsubscribe in _notificationUnsubscribers) {
    unsubscribe();
  }
  [_notificationUnsubscribers removeAllObjects];
  _delegates = nil;
  _notificationUnsubscribers = nil;
}

init

- (instancetype) init

implementation

Definition at line 1 of file FlutterAppLifecycleDelegate.mm.

                     {
  if (self = [super init]) {
    _notificationUnsubscribers = [[NSMutableArray alloc] init];
 
// Using a macro to avoid errors where the notification doesn't match the
// selector.
#ifdef OBSERVE_NOTIFICATION
#error OBSERVE_NOTIFICATION ALREADY DEFINED!
#else
#define OBSERVE_NOTIFICATION(SELECTOR) \
  [self addObserverFor:NSApplication##SELECTOR##Notification selector:@selector(handle##SELECTOR:)]
#endif
 
    OBSERVE_NOTIFICATION(WillFinishLaunching);
    OBSERVE_NOTIFICATION(DidFinishLaunching);
    OBSERVE_NOTIFICATION(WillBecomeActive);
    OBSERVE_NOTIFICATION(DidBecomeActive);
    OBSERVE_NOTIFICATION(WillResignActive);
    OBSERVE_NOTIFICATION(DidResignActive);
    OBSERVE_NOTIFICATION(WillTerminate);
    OBSERVE_NOTIFICATION(WillHide);
    OBSERVE_NOTIFICATION(DidHide);
    OBSERVE_NOTIFICATION(WillUnhide);
    OBSERVE_NOTIFICATION(DidUnhide);
    OBSERVE_NOTIFICATION(DidChangeScreenParameters);
    OBSERVE_NOTIFICATION(DidChangeOcclusionState);
 
#undef OBSERVE_NOTIFICATION
 
    _delegates = [NSPointerArray weakObjectsPointerArray];
  }
  return self;
}

IsPowerOfTwo

+ (static BOOL) IsPowerOfTwo (NSUInteger)  x

implementation

Definition at line 72 of file FlutterAppLifecycleDelegate.mm.

                                       {
  return x != 0 && (x & (x - 1)) == 0;
}

removeDelegate:

- (void) removeDelegate:

(NSObject<FlutterAppLifecycleDelegate>*)

delegate

Unregisters delegate so that it will no longer receive life cycle callbacks via this FlutterAppLifecycleDelegate.

delegate will only be referenced weakly.

Definition at line 72 of file FlutterAppLifecycleDelegate.mm.

                      :(NSObject<FlutterAppLifecycleDelegate>*)delegate {
  NSUInteger index = [[_delegates allObjects] indexOfObject:delegate];
  if (index != NSNotFound) {
    [_delegates removePointerAtIndex:index];
  }
}

Property Documentation

delegates

- (NSPointerArray*) delegates

readwritenonatomicstrongimplementation

Registered delegates. Exposed to allow FlutterAppDelegate to share the delegate list for handling non-notification delegation.

Provided by category FlutterAppLifecycleRegistrar().

Definition at line 15 of file FlutterAppLifecycleDelegate_Internal.h.

---

The documentation for this class was generated from the following files:

• shell/platform/darwin/macos/framework/Headers/FlutterAppLifecycleDelegate.h
• shell/platform/darwin/macos/framework/Source/FlutterAppLifecycleDelegate.mm