/*

* 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>

NS_ASSUME_NONNULL_BEGIN

/**

A layout spec that wraps another layoutable child, applying insets around it.

If the child has a size specified as a percentage, the percentage is resolved against this spec's parent

size **after** applying insets.

@example ASOuterLayoutSpec contains an ASInsetLayoutSpec with an ASInnerLayoutSpec. Suppose that:

- ASOuterLayoutSpec is 200pt wide.

- ASInnerLayoutSpec specifies its width as 100%.

- The ASInsetLayoutSpec has insets of 10pt on every side.

ASInnerLayoutSpec will have size 180pt, not 200pt, because it receives a parent size that has been adjusted for insets.

If you're familiar with CSS: ASInsetLayoutSpec's child behaves similarly to "box-sizing: border-box".

An infinite inset is resolved as an inset equal to all remaining space after applying the other insets and child size.

@example An ASInsetLayoutSpec with an infinite left inset and 10px for all other edges will position it's child 10px from the right edge.

*/

@interface ASInsetLayoutSpec : ASLayoutSpec

@property (nonatomic, assign) UIEdgeInsets insets;

/**

@param insets The amount of space to inset on each side.

@param child The wrapped child to inset.

*/

+ (instancetype)insetLayoutSpecWithInsets:(UIEdgeInsets)insets child:(id<ASLayoutable>)child;

@end

NS_ASSUME_NONNULL_END