Add 'submodules/AsyncDisplayKit/' from commit '02bedc12816e251ad71777f9d2578329b6d2bef6'

git-subtree-dir: submodules/AsyncDisplayKit
git-subtree-mainline: d06f423e0e
git-subtree-split: 02bedc1281

submodules/AsyncDisplayKit/Source/TextKit/ASTextKitEntityAttribute.h

@@ -0,0 +1,36 @@
+//
+//  ASTextKitEntityAttribute.h
+//  Texture
+//
+//  Copyright (c) Facebook, Inc. and its affiliates.  All rights reserved.
+//  Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc.  All rights reserved.
+//  Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
+//
+
+#import <Foundation/Foundation.h>
+
+#import <AsyncDisplayKit/ASAvailability.h>
+
+#if AS_ENABLE_TEXTNODE
+
+#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, readonly) id<NSObject> entity;
+
+- (instancetype)initWithEntity:(id<NSObject>)entity;
+
+@end
+
+#endif