Quick dirty NSLabel class for drawing text.

NSLabel.swift

//
//  NSLabel.swift
//
//
//  Created by Khan Winter on 4/8/22.
//

import AppKit

class NSLabel: NSView {
    var string: String
    var font: NSFont
    var backgroundColor: NSColor?

    override init(frame frameRect: NSRect) {
        self.string = ""
        self.font = NSFont.systemFont(ofSize: 12, weight: .regular)
        super.init(frame: frameRect)
    }

    init(string: String) {
        self.string = string
        self.font = NSFont.systemFont(ofSize: 12, weight: .regular)
        super.init(frame: .zero)
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override var intrinsicContentSize: NSSize {
        makeAttributedString().size()
    }

    override func draw(_ dirtyRect: NSRect) {
        guard let context = NSGraphicsContext.current?.cgContext else { return }
        context.saveGState()

        if let backgroundColor {
            context.setFillColor(backgroundColor.cgColor)
            context.fill([NSRect(origin: .zero, size: self.frame.size)])
        }

        let attributedString = makeAttributedString()

        let size = attributedString.size()
        let yPos = (self.frame.size.height - size.height)/2
        let rect = NSRect(x: 0, y: yPos, width: self.frame.size.width, height: size.height)
        attributedString.draw(in: rect)
        context.restoreGState()
    }

    private func makeAttributedString() -> NSAttributedString {
        // swiftlint:disable:next force_cast
        let paragraphStyle = NSMutableParagraphStyle.default.mutableCopy() as! NSMutableParagraphStyle
        paragraphStyle.alignment = .center
        paragraphStyle.lineBreakMode = .byTruncatingTail
        return NSAttributedString(
            string: string,
            attributes: [.font: font, .paragraphStyle: paragraphStyle]
        )
    }
}