OFNotificationCenter.h

/*
 * Copyright (c) 2008-2026 Jonathan Schleifer <js@nil.im>
 *
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3.0 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * version 3.0 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3.0 along with this program. If not, see
 * <https://www.gnu.org/licenses/>.
 */
 
#import "OFObject.h"
#import "OFNotification.h"
 
OF_ASSUME_NONNULL_BEGIN
 
@class OFMutableDictionary OF_GENERIC(KeyType, ObjectType);
 
#ifdef OF_HAVE_BLOCKS
typedef void (^OFNotificationCenterBlock)(OFNotification *notification);
#endif

#ifndef OF_NOTIFICATION_CENTER_M
OF_SUBCLASSING_RESTRICTED
#endif
@interface OFNotificationCenter: OFObject
{
    OFMutableDictionary *_handles;
}
 
#ifdef OF_HAVE_CLASS_PROPERTIES
@property (class, readonly, nonatomic) OFNotificationCenter *defaultCenter;
#endif

+ (OFNotificationCenter *)defaultCenter;

- (void)addObserver: (id)observer
       selector: (SEL)selector
           name: (OFNotificationName)name
         object: (nullable id)object;

- (void)removeObserver: (id)observer
          selector: (SEL)selector
          name: (OFNotificationName)name
        object: (nullable id)object;
 
#ifdef OF_HAVE_BLOCKS
- (id)addObserverForName: (OFNotificationName)name
          object: (nullable id)object
          usingBlock: (OFNotificationCenterBlock)block;

- (void)removeObserver: (id)observer;
#endif

- (void)postNotification: (OFNotification *)notification;

- (void)postNotificationName: (OFNotificationName)name
              object: (nullable id)object;

- (void)postNotificationName: (OFNotificationName)name
              object: (nullable id)object
            userInfo: (nullable OFDictionary *)userInfo;
@end
 
OF_ASSUME_NONNULL_END