text: //
  //  ASRatioLayoutSpec.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.
  //
  
  #import <AsyncDisplayKit/ASLayoutSpec.h>
  #import <AsyncDisplayKit/ASLayoutElement.h>
  
  NS_ASSUME_NONNULL_BEGIN
  
  /**
   Ratio layout spec
   For when the content should respect a certain inherent ratio but can be scaled (think photos or videos)
   The ratio passed is the ratio of height / width you expect
  
   For a ratio 0.5, the spec will have a flat rectangle shape
    _ _ _ _
   |       |
   |_ _ _ _|
  
   For a ratio 2.0, the spec will be twice as tall as it is wide
    _ _
   |   |
   |   |
   |   |
   |_ _|
  
   **/
  @interface ASRatioLayoutSpec : ASLayoutSpec
  
  @property (nonatomic, assign) CGFloat ratio;
  
  + (instancetype)ratioLayoutSpecWithRatio:(CGFloat)ratio child:(id<ASLayoutElement>)child AS_WARN_UNUSED_RESULT;
  
  @end
  
  NS_ASSUME_NONNULL_END
  