Shuffle & Cleanup Stuff (#3080)

Source/ASCollectionViewLayoutFacilitatorProtocol.h

@@ -0,0 +1,45 @@
+//
+//  ASCollectionViewLayoutFacilitatorProtocol.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.
+//
+
+#pragma once
+#import <Foundation/Foundation.h>
+
+/**
+ * This facilitator protocol is intended to help Layout to better
+ * gel with the CollectionView
+ */
+@protocol ASCollectionViewLayoutFacilitatorProtocol <NSObject>
+
+/**
+ * Inform that the collectionView is editing the cells at a list of indexPaths
+ *
+ * @param indexPaths an array of NSIndexPath objects of cells being/will be edited.
+ * @param isBatched indicates whether the editing operation will be batched by the collectionView
+ *
+ * NOTE: when isBatched, used in combination with -collectionViewWillPerformBatchUpdates
+ */
+- (void)collectionViewWillEditCellsAtIndexPaths:(NSArray *)indexPaths batched:(BOOL)isBatched;
+
+/**
+ * Inform that the collectionView is editing the sections at a set of indexes
+ *
+ * @param indexes an NSIndexSet of section indexes being/will be edited.
+ * @param batched indicates whether the editing operation will be batched by the collectionView
+ *
+ * NOTE: when batched, used in combination with -collectionViewWillPerformBatchUpdates
+ */
+- (void)collectionViewWillEditSectionsAtIndexSet:(NSIndexSet *)indexes batched:(BOOL)batched;
+
+/**
+ * Informs the delegate that the collectionView is about to call performBatchUpdates
+ */
+- (void)collectionViewWillPerformBatchUpdates;
+
+@end