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37 lines
1.2 KiB
Objective-C
37 lines
1.2 KiB
Objective-C
//
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// ASTextKitEntityAttribute.h
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <Foundation/Foundation.h>
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#import <AsyncDisplayKit/ASAvailability.h>
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#if AS_ENABLE_TEXTNODE
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#import <AsyncDisplayKit/ASBaseDefines.h>
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/**
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The object that should be embedded with ASTextKitEntityAttributeName. Please note that the entity you provide MUST
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implement a proper hash and isEqual function or your application performance will grind to a halt due to
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NSMutableAttributedString's usage of a global hash table of all attributes. This means the entity should NOT be a
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Foundation Collection (NSArray, NSDictionary, NSSet, etc.) since their hash function is a simple count of the values
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in the collection, which causes pathological performance problems deep inside NSAttributedString's implementation.
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rdar://19352367
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*/
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AS_SUBCLASSING_RESTRICTED
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@interface ASTextKitEntityAttribute : NSObject
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@property (nonatomic, readonly) id<NSObject> entity;
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- (instancetype)initWithEntity:(id<NSObject>)entity;
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@end
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#endif
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