Rename CK classes to AS classes

AsyncDisplayKit/TextKit/ASTextKitTruncating.h

@@ -0,0 +1,37 @@
+/*
+ *  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 <vector>
+
+#import <UIKit/UIKit.h>
+
+#import "ASTextKitRenderer.h"
+
+@protocol ASTextKitTruncating <NSObject>
+
+@property (nonatomic, assign, readonly) std::vector<NSRange> visibleRanges;
+@property (nonatomic, assign, readonly) CGRect truncationStringRect;
+
+/**
+ A truncater object is initialized with the full state of the text.  It is a Single Responsibility Object that is
+ mutative.  It configures the state of the TextKit components (layout manager, text container, text storage) to achieve
+ the intended truncation, then it stores the resulting state for later fetching.
+
+ The truncater may mutate the state of the text storage such that only the drawn string is actually present in the
+ text storage itself.
+
+ The truncater should not store a strong reference to the context to prevent retain cycles.
+ */
+- (instancetype)initWithContext:(ASTextKitContext *)context
+     truncationAttributedString:(NSAttributedString *)truncationAttributedString
+         avoidTailTruncationSet:(NSCharacterSet *)avoidTailTruncationSet
+                constrainedSize:(CGSize)constrainedSize;
+
+@end