Swiftgram/submodules/Display/Source/SparseContainerView.swift

import Foundation
import UIKit
import AsyncDisplayKit

open class SparseNode: ASDisplayNode {
    override open func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        if self.alpha.isZero {
            return nil
        }
        for view in self.view.subviews.reversed() {
            if let result = view.hitTest(self.view.convert(point, to: view), with: event), result.isUserInteractionEnabled {
                return result
            }
        }
        
        if !self.bounds.inset(by: self.hitTestSlop).contains(point) {
            return nil
        }
        
        let result = super.hitTest(point, with: event)
        if result != self.view {
            return result
        } else {
            return nil
        }
    }
}

open class SparseContainerView: UIView {
    override public func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        if self.alpha.isZero {
            return nil
        }
        for view in self.subviews.reversed() {
            if let result = view.hitTest(self.convert(point, to: view), with: event), result.isUserInteractionEnabled {
                return result
            }
        }
        
        let result = super.hitTest(point, with: event)
        if result != self {
            return result
        } else {
            return nil
        }
    }
}