/usr/include/GNUstep/EOControl/EOObserver.h is in libgnustep-dl2-dev 0.12.0-15.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | /* -*-objc-*-
EOObserver.h
Copyright (C) 2000,2002,2003,2004,2005 Free Software Foundation, Inc.
Author: Mirko Viviani <mirko.viviani@gmail.com>
Date: June 2000
This file is part of the GNUstep Database Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB.
If not, write to the Free Software Foundation,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __EOObserver_h__
#define __EOObserver_h__
#ifdef GNUSTEP
#include <Foundation/NSObject.h>
#else
#include <Foundation/Foundation.h>
#endif
@class NSArray;
@interface NSObject (EOObserver)
- (void)willChange;
@end
@protocol EOObserving <NSObject>
- (void)objectWillChange: (id)subject;
@end
@interface EOObserverCenter : NSObject
+ (void)addObserver: (id <EOObserving>)observer forObject: (id)object;
+ (void)removeObserver: (id <EOObserving>)observer forObject: (id)object;
+ (void)notifyObserversObjectWillChange: (id)object;
+ (NSArray *)observersForObject: (id)object;
+ (id)observerForObject: (id)object ofClass: (Class)targetClass;
+ (void)suppressObserverNotification;
+ (void)enableObserverNotification;
+ (unsigned)observerNotificationSuppressCount;
+ (void)addOmniscientObserver: (id <EOObserving>)observer;
+ (void)removeOmniscientObserver: (id <EOObserving>)observer;
@end
@class EODelayedObserverQueue;
typedef enum {
EOObserverPriorityImmediate,
EOObserverPriorityFirst,
EOObserverPrioritySecond,
EOObserverPriorityThird,
EOObserverPriorityFourth,
EOObserverPriorityFifth,
EOObserverPrioritySixth,
EOObserverPriorityLater
} EOObserverPriority;
#define EOObserverNumberOfPriorities ((unsigned)EOObserverPriorityLater + 1)
@interface EODelayedObserver : NSObject <EOObserving>
{
@public
EODelayedObserver *_next; /* Linked List. */
}
- (void)objectWillChange: (id)subject;
- (EOObserverPriority)priority;
- (EODelayedObserverQueue *)observerQueue;
- (void)subjectChanged; /* Subclass responsibility. */
- (void)discardPendingNotification;
@end
/* To be used with NSRunLoop's performSelector:target:argument:order:modes: */
enum
{
EOFlushDelayedObserversRunLoopOrdering = 400000
};
@interface EODelayedObserverQueue : NSObject
{
/* Lists per priority. */
EODelayedObserver *_queue[EOObserverNumberOfPriorities];
unsigned _highestNonEmptyQueue;
BOOL _haveEntryInNotificationQueue;
NSArray *_modes;
}
+ (EODelayedObserverQueue *)defaultObserverQueue;
- (void)enqueueObserver: (EODelayedObserver *)observer;
- (void)dequeueObserver: (EODelayedObserver *)observer;
- (void)notifyObserversUpToPriority: (EOObserverPriority)priority;
- (void)setRunLoopModes: (NSArray *)modes;
- (NSArray *)runLoopModes;
@end
@interface EOObserverProxy : EODelayedObserver
{
id _target;
SEL _action;
EOObserverPriority _priority;
}
- (id)initWithTarget: (id)target
action: (SEL)action
priority: (EOObserverPriority)priority;
@end
#endif
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