Shuffle & Cleanup Stuff (#3080)

Source/Private/ASRectTable.h

@@ -0,0 +1,64 @@
+//
+//  ASRectTable.h
+//  AsyncDisplayKit
+//
+//  Created by Adlai Holler on 2/24/17.
+//  Copyright © 2017 Facebook. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <CoreGraphics/CGGeometry.h>
+#import <AsyncDisplayKit/ASBaseDefines.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * An alias for an NSMapTable created to store rects.
+ *
+ * You should not call -objectForKey:, -setObject:forKey:, or -allObjects
+ * on these objects.
+ */
+typedef NSMapTable ASRectTable;
+
+/**
+ * A category for creating & using map tables meant for storing CGRects.
+ *
+ * This category is private, so name collisions are not worth worrying about.
+ */
+@interface NSMapTable<KeyType, id> (ASRectTableMethods)
+
+/**
+ * Creates a new rect table with (NSMapTableStrongMemory | NSMapTableObjectPointerPersonality) for keys.
+ */
++ (ASRectTable *)rectTableForStrongObjectPointers;
+
+/**
+ * Creates a new rect table with (NSMapTableWeakMemory | NSMapTableObjectPointerPersonality) for keys.
+ */
++ (ASRectTable *)rectTableForWeakObjectPointers;
+
+/**
+ * Retrieves the rect for a given key, or CGRectNull if the key is not found.
+ *
+ * @param key An object to lookup the rect for.
+ */
+- (CGRect)rectForKey:(KeyType)key;
+
+/**
+ * Sets the given rect for the associated key.
+ *
+ * @param rect The rect to store as value.
+ * @param key The key to use for the rect.
+ */
+- (void)setRect:(CGRect)rect forKey:(KeyType)key;
+
+/**
+ * Removes the rect for the given key, if one exists.
+ *
+ * @param key The key to remove.
+ */
+- (void)removeRectForKey:(KeyType)key;
+
+@end
+
+NS_ASSUME_NONNULL_END