/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    Contains functionality to render an `AttributedString` as a `Drawable`.

*/

import UIKit

/// Draws text.

struct TextDrawable: Layout, Drawable {

    var text: String

    var frame: CGRect

    mutating func layout(in rect: CGRect) {

        frame = rect

    }

    func draw(in context: CGContext) {

        UIGraphicsPushContext(context)

        let attributedString = NSAttributedString(string: text, attributes: [NSFontAttributeName: UIFont.systemFont(ofSize: 40)])

        var frame = self.frame

        let height = min(attributedString.size().height, frame.size.height)

        frame.origin.y += 0.5 * frame.size.height - height

        frame.size.height = height

        attributedString.draw(in: frame)

        UIGraphicsPopContext()

    }

    typealias Content = Drawable

    var contents: [Content] {

        return [self]

    }

}