/*
 *  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/ASDimension.h>
#import <AsyncDisplayKit/ASStackLayoutDefines.h>

/**
 *  Layout options that can be defined for an ASLayoutable being added to a ASStackLayoutSpec.
 */
@protocol ASStackLayoutable <NSObject>

/**
 * @abstract Additional space to place before this object in the stacking direction.
 * Used when attached to a stack layout.
 */
@property (nonatomic, readwrite) CGFloat spacingBefore;

/**
 * @abstract Additional space to place after this object in the stacking direction.
 * Used when attached to a stack layout.
 */
@property (nonatomic, readwrite) CGFloat spacingAfter;

/**
 * @abstract If the sum of childrens' stack dimensions is less than the minimum size, should this object grow?
 * Used when attached to a stack layout.
 */
@property (nonatomic, readwrite) BOOL flexGrow;

/**
 * @abstract If the sum of childrens' stack dimensions is greater than the maximum size, should this object shrink?
 * Used when attached to a stack layout.
 */
@property (nonatomic, readwrite) BOOL flexShrink;

/**
 * @abstract Specifies the initial size in the stack dimension for this object.
 * Default to ASRelativeDimensionUnconstrained.
 * Used when attached to a stack layout.
 */
@property (nonatomic, readwrite) ASRelativeDimension flexBasis;

/**
 * @abstract Orientation of the object along cross axis, overriding alignItems
 * Used when attached to a stack layout.
 */
@property (nonatomic, readwrite) ASStackLayoutAlignSelf alignSelf;

/**
 *  @abstract Used for baseline alignment. The distance from the top of the object to its baseline.
 */
@property (nonatomic, readwrite) CGFloat ascender;

/**
 *  @abstract Used for baseline alignment. The distance from the baseline of the object to its bottom.
 */
@property (nonatomic, readwrite) CGFloat descender;

@end
