kean/share.swift

## share.swift
//: A UIKit based Playground for presenting user interface

import UIKit
import PlaygroundSupport

extension NSAttributedString {
    static func make(html: String, size: CGFloat, color: UIColor) -> NSAttributedString? {
        // TODO: Size is configured programatically which means we can
        // change it dynamically if needed (aka dynamic type)

        let style = """
        body {
          color: \(color.hexString!);
          font-family: -apple-system;
          font-size: \(size)px;
        }
        b {
          font-weight: 600;
          color: hotpink;
        }
        """

        let template = """
        <!doctype html>
        <html>
          <head>
            <style>
              \(style)
            </style>
          </head>
          <body>
            \(html)
          </body>
        </html>
        """

        guard let data = template.data(using: .utf8) else {
            return nil
        }

        guard let attributedString = try? NSAttributedString(
            data: data,
            options: [.documentType: NSAttributedString.DocumentType.html],
            documentAttributes: nil) else {
            return nil
        }

        return attributedString
    }
}

extension UIColor {
    var hexString: String? {
        if let components = cgColor.components, components.count == 3 {
            let r = components[0]
            let g = components[1]
            let b = components[2]
            return  String(format: "#%02x%02x%02x", (Int)(r * 255), (Int)(g * 255), (Int)(b * 255))
        }
        return "000000"
    }
}

class MyViewController : UIViewController {
    override func loadView() {
        let view = UIView()
        view.backgroundColor = .white


        let html = """
        Let's test <b>bold</b>.<br><br>And a link <a href="http://google.com">google</a>.
        """

        let data = Data(html.utf8)

        let a = NSAttributedString.make(html: html, size: 18, color: .brown)

        print(a)


        let label = UITextView()
        label.frame = CGRect(x: 20, y: 200, width: 200, height: 100)
        label.attributedText = a

        label.linkTextAttributes = [
            .foregroundColor: UIColor.red,
            .underlineColor: UIColor.clear
        ]

        view.addSubview(label)
        self.view = view
    }
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()
	//: A UIKit based Playground for presenting user interface

	import UIKit
	import PlaygroundSupport

	extension NSAttributedString {
	static func make(html: String, size: CGFloat, color: UIColor) -> NSAttributedString? {
	// TODO: Size is configured programatically which means we can
	// change it dynamically if needed (aka dynamic type)

	let style = """
	body {
	color: \(color.hexString!);
	font-family: -apple-system;
	font-size: \(size)px;
	}
	b {
	font-weight: 600;
	color: hotpink;
	}
	"""

	let template = """
	<!doctype html>
	<html>
	<head>
	<style>
	\(style)
	</style>
	</head>
	<body>
	\(html)
	</body>
	</html>
	"""

	guard let data = template.data(using: .utf8) else {
	return nil
	}

	guard let attributedString = try? NSAttributedString(
	data: data,
	options: [.documentType: NSAttributedString.DocumentType.html],
	documentAttributes: nil) else {
	return nil
	}

	return attributedString
	}
	}

	extension UIColor {
	var hexString: String? {
	if let components = cgColor.components, components.count == 3 {
	let r = components[0]
	let g = components[1]
	let b = components[2]
	return String(format: "#%02x%02x%02x", (Int)(r * 255), (Int)(g * 255), (Int)(b * 255))
	}
	return "000000"
	}
	}

	class MyViewController : UIViewController {
	override func loadView() {
	let view = UIView()
	view.backgroundColor = .white


	let html = """
	Let's test <b>bold</b>.<br><br>And a link <a href="http://google.com">google</a>.
	"""

	let data = Data(html.utf8)

	let a = NSAttributedString.make(html: html, size: 18, color: .brown)

	print(a)


	let label = UITextView()
	label.frame = CGRect(x: 20, y: 200, width: 200, height: 100)
	label.attributedText = a

	label.linkTextAttributes = [
	.foregroundColor: UIColor.red,
	.underlineColor: UIColor.clear
	]

	view.addSubview(label)
	self.view = view
	}
	}
	// Present the view controller in the Live View window
	PlaygroundPage.current.liveView = MyViewController()