dagronf

private extension NSImage {
   static func checkerboardImage(ofSize: CGSize, color1: NSColor, color2: NSColor, checkSize: CGFloat = 8) -> NSImage? {
      let width = NSNumber(value: Float(checkSize))
      let center = CIVector(cgPoint: CGPoint(x: 0, y: 0))
      let darkColor = CIColor(cgColor: color1.cgColor)
      let lightColor = CIColor(cgColor: color2.cgColor)
      let sharpness = NSNumber(value: 1.0)

      guard let filter = CIFilter(name: "CICheckerboardGenerator") else {
         return nil

dagronf

/// A simple layer class to expose an animation progress for a CAAnimation.
public class ArbitraryAnimationLayer: CALayer {

  static let KeyPath: String = "progress"

  override init() {
    super.init()
  }

  var progressCallback: ((CGFloat) -> Void)?

dagronf

// FROM: https://www.objc.io/blog/2018/12/18/atomic-variables/

final class Atomic<A> {
   private let queue = DispatchQueue(label: "Atomic serial queue")
   private var _value: A
   init(_ value: A) {
      self._value = value
   }

   var value: A {

dagronf

import Cocoa

class DSFUnenabledButton: NSButton {
   var isUserInteractionEnabled = false
   override func hitTest(_ point: NSPoint) -> NSView? {
      return isUserInteractionEnabled ? super.hitTest(point) : nil
   }
}

dagronf

//
//  DSFRestrictedPanGestureRecognizer.swift
//  Time Zones
//
//  Created by Darren Ford on 30/6/18.
//  Copyright © 2018 Darren Ford. All rights reserved.
//

import UIKit
import UIKit.UIGestureRecognizerSubclass

dagronf

import Foundation

extension String {
   /// Returns a new string by removing any instances of the specified characters
   ///
   /// - Parameter
   ///   - replacementChars: String containing the characters to replace
   /// - Returns: a new string filtering out the specified characters
   func removing(charactersIn replacementChars: String) -> String {
      return self.filter { replacementChars.contains($0) == false }

dagronf

import Cocoa

class AutoselectOnFocusTextField: NSTextField {
   override func becomeFirstResponder() -> Bool {
      guard super.becomeFirstResponder() else {
         return false
      }
      if let editor = self.currentEditor() {
         editor.perform(#selector(selectAll(_:)), with: self, afterDelay: 0)
      }

dagronf

   let menuController = UIMenuController.shared
   let item1 = UIMenuItem(title: "Item 1", action: #selector(performItem1))
   let item2 = UIMenuItem(title: "Item 2", action: #selector(performItem2))
   menuController.menuItems = [item1, item2]
   menuController.setMenuVisible(true, animated: true)

dagronf

import UIKit

extension UIColor {
   private struct ColorComponents {
      var r: CGFloat = 0.0
      var g: CGFloat = 0.0
      var b: CGFloat = 0.0
      var a: CGFloat = 0.0
   }

dagronf

/// From https://www.rightpoint.com/rplabs/xctassert-optional-unwrapping

// Usage :-
//
// class TestCaseUnwrap: XCTestCase {
//    func testUnwrap() throws {
//       let string: String? = nil
//       let newString = try AssertNotNilAndUnwrap(string)
//       XCTAssert(newString.lengthOfBytes(using: .utf8) > 0)
//    }