class StrTestVC: UIViewController, UITextViewDelegate {
	
	var textView: ScriptEditingView!
	
	override func viewDidLoad() {
		super.viewDidLoad()
		
		textView = ScriptEditingView(frame: .zero, textContainer: nil)
		textView.backgroundColor = .black
		textView.delegate = self
		view.addSubview(textView)
		textView.allowsEditingTextAttributes = true
		
		let guide = view.safeAreaLayoutGuide
		
		textView.translatesAutoresizingMaskIntoConstraints = false
		NSLayoutConstraint.activate([
			textView.leadingAnchor.constraint(equalTo: guide.leadingAnchor),
			textView.trailingAnchor.constraint(equalTo: guide.trailingAnchor),
			textView.topAnchor.constraint(equalTo: view.topAnchor),
			textView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
		])
		
		let attributedString = sampleAttrString()

		textView.attributedText = attributedString
		
		NSLog("Attributed now")
		dumpAttributesOfText()
		
		DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
			NSLog("Attributes after 1 sec")
			self.dumpAttributesOfText()
		}
	}

	private func dumpAttributesOfText() {
		textView.attributedText?.enumerateAttributes(in: NSRange(location: 0, length: textView.attributedText!.length), options: .longestEffectiveRangeNotRequired, using: { dictionary, range, stop in
			NSLog(" range \(range)")
			
			if let font = dictionary[.font] as? UIFont {
				NSLog("Font at range \(range) - \(font.fontName), \(font.pointSize)")
			}
			
			if let foregroundColor = dictionary[.foregroundColor] as? UIColor {
				NSLog("Foregroundcolor \(foregroundColor) at range \(range)")
			}
			
			if let underline = dictionary[.underlineStyle] as? Int {
				NSLog("Underline \(underline) at range \(range)")
			}
		})
	}
	
	func sampleAttrString() -> NSMutableAttributedString {
		guard let theFont: UIFont = UIFont(name: "HelveticaNeue", size: 30.0) else {
			fatalError()
		}
		
		let attsA: [NSAttributedString.Key : Any] = [
			.font: theFont,
			.foregroundColor: UIColor.white,
		]
		
		let gRGB = CGColorSpace(name: CGColorSpace.genericRGBLinear)!
		let theCGColor = CGColor(colorSpace: gRGB, components: [0.96863, 0.80784, 0.27451, 1])!
		let theColor = UIColor(cgColor: theCGColor)

		let attsB: [NSAttributedString.Key : Any] = [
			.font: theFont,
			.foregroundColor: theColor,
		]
		
		let partOne = NSMutableAttributedString(string: "1234567890123 ", attributes: attsA)
		let partTwo = NSAttributedString(string: "String", attributes: attsB)
		
		partOne.append(partTwo)
		
		return partOne
	}

}

/*
output:

 Attributed now
  range {0, 14}
 Font at range {0, 14} - HelveticaNeue, 30.0
 Foregroundcolor UIExtendedGrayColorSpace 1 1 at range {0, 14}
  range {14, 6}
 Font at range {14, 6} - HelveticaNeue, 30.0
 Foregroundcolor kCGColorSpaceModelRGB 0.96863 0.80784 0.27451 1  at range {14, 6}

 Attributes after 1 sec
  range {0, 14}
 Font at range {0, 14} - HelveticaNeue, 30.0
 Foregroundcolor UIExtendedGrayColorSpace 1 1 at range {0, 14}
  range {14, 6}
 Font at range {14, 6} - HelveticaNeue, 30.0
 Foregroundcolor kCGColorSpaceModelRGB 0.96863 0.80784 0.27451 1  at range {14, 6}

*/