SupplementaryNode.m

//
//  SupplementaryNode.m
//  Sample
//
//  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.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
//  FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
//  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
//  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

#import "SupplementaryNode.h"

#import <AsyncDisplayKit/ASDisplayNode+Subclasses.h>
#import <AsyncDisplayKit/ASInsetLayoutSpec.h>
#import <AsyncDisplayKit/ASCenterLayoutSpec.h>

@implementation SupplementaryNode {
  ASTextNode *_textNode;
}

- (instancetype)initWithText:(NSString *)text
{
  self = [super init];
  if (self != nil) {
    _textNode = [[ASTextNode alloc] init];
    _textNode.attributedText = [[NSAttributedString alloc] initWithString:text
                                                                 attributes:[self textAttributes]];
    [self addSubnode:_textNode];
  }
  return self;
}

- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
{
  ASCenterLayoutSpec *center = [[ASCenterLayoutSpec alloc] init];
  center.centeringOptions = ASCenterLayoutSpecCenteringY;
  center.child = _textNode;
  return center;
}

#pragma mark - Text Formatting

- (NSDictionary *)textAttributes
{
  return @{
    NSFontAttributeName: [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline],
    NSForegroundColorAttributeName: [UIColor grayColor],
  };
}

@end