class TextViewLabel: UITextView {
	
	override init(frame: CGRect, textContainer: NSTextContainer?) {
		super.init(frame: frame, textContainer: textContainer)
		commonInit()
	}
	
	required init?(coder aDecoder: NSCoder) {
		super.init(coder: aDecoder)
		commonInit()
	}
	
	override func prepareForInterfaceBuilder() {
		super.prepareForInterfaceBuilder()
		commonInit()
	}
	func commonInit() -> Void {
		isScrollEnabled = false
		isEditable = false
		isSelectable = false
		textContainerInset = UIEdgeInsets.zero
		textContainer.lineFragmentPadding = 0
	}
	
}

class TextViewLabelTestVC: UIViewController {

	override func viewDidLoad() {
		super.viewDidLoad()

		let stack: UIStackView = {
			let v = UIStackView()
			v.axis = .vertical
			v.spacing = 8
			v.translatesAutoresizingMaskIntoConstraints = false
			return v
		}()

		let v1 = UILabel()
		let v2 = TextViewLabel()
		let v3 = UILabel()
		let v4 = TextViewLabel()

		[v1, v2, v3, v4].forEach { v in
			let lb = UILabel()
			lb.backgroundColor = UIColor(white: 0.95, alpha: 1.0)
			if let v = v as? UILabel {
				lb.text = "UILabel"
				v.backgroundColor = .cyan
				v.font = .systemFont(ofSize: 16.0)
				v.numberOfLines = 0
			}
			if let v = v as? TextViewLabel {
				lb.text = "Text View Label"
				v.backgroundColor = .green
				v.font = .systemFont(ofSize: 16.0)
			}
			stack.addArrangedSubview(lb)
			stack.addArrangedSubview(v)
		}
		
		stack.setCustomSpacing(32.0, after: v2)
		
		view.addSubview(stack)
		
		let g = view.safeAreaLayoutGuide
		NSLayoutConstraint.activate([
		
			stack.topAnchor.constraint(equalTo: g.topAnchor, constant: 40.0),
			stack.widthAnchor.constraint(equalToConstant: 255.0),
			stack.centerXAnchor.constraint(equalTo: g.centerXAnchor),

		])
		
		var vs: String = "Does this string result in an orphan?"

		v1.text = vs
		v2.text = vs
		
		vs = "This string should wrap onto four lines of text. Compare the word wrap to see if TextKit allows the orphan."

		v3.text = vs
		v4.text = vs
	}
}