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ASTextKitEntityAttribute.h
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executable file
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//
// ASTextKitEntityAttribute.h
// AsyncDisplayKit
//
// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#import <Foundation/Foundation.h>
#import <AsyncDisplayKit/ASBaseDefines.h>
/**
The object that should be embedded with ASTextKitEntityAttributeName. Please note that the entity you provide MUST
implement a proper hash and isEqual function or your application performance will grind to a halt due to
NSMutableAttributedString's usage of a global hash table of all attributes. This means the entity should NOT be a
Foundation Collection (NSArray, NSDictionary, NSSet, etc.) since their hash function is a simple count of the values
in the collection, which causes pathological performance problems deep inside NSAttributedString's implementation.
rdar://19352367
*/
AS_SUBCLASSING_RESTRICTED
@interface ASTextKitEntityAttribute : NSObject
@property (nonatomic, strong, readonly) id<NSObject> entity;
- (instancetype)initWithEntity:(id<NSObject>)entity;
@end