StrikethroughRenderer.m

#import "StrikethroughRenderer.h"
#import "MarkdownASTNode.h"
#import "RenderContext.h"
#import "RendererFactory.h"
#import "StyleConfig.h"

@implementation StrikethroughRenderer {
  __weak RendererFactory *_rendererFactory;
  StyleConfig *_config;
}

- (instancetype)initWithRendererFactory:(id)rendererFactory config:(id)config
{
  if (self = [super init]) {
    _rendererFactory = rendererFactory;
    _config = (StyleConfig *)config;
  }
  return self;
}

#pragma mark - Rendering

- (void)renderNode:(MarkdownASTNode *)node into:(NSMutableAttributedString *)output context:(RenderContext *)context
{
  NSUInteger start = output.length;
  [_rendererFactory renderChildrenOfNode:node into:output context:context];

  NSRange range = NSMakeRange(start, output.length - start);
  if (range.length == 0)
    return;

  // Apply strikethrough style
  [output addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlineStyleSingle) range:range];

  // Apply strikethrough line color (not text color)
  RCTUIColor *strikethroughColor = [_config strikethroughColor];
  [output addAttribute:NSStrikethroughColorAttributeName value:strikethroughColor range:range];
}

@end