Catalyst status menu item via NSPopover swizzle

PSTLNativeStatusItemController.swift

//
//  PSTLNativeStatusItemController.swift
//  PastelIntegration
//
//  Created by Steven Troughton-Smith on 09/06/2021.
//  Copyright © 2021 Steven Troughton-Smith. All rights reserved.
//

import AppKit

extension NSPopover {
	@objc func PSTL_showRelativeToRect(_ rect:CGRect, ofView:NSView?, preferredEdge:CGRectEdge) {
		if ofView == nil {
		
			if let sender = PSTLStatusItem.button {
				
				if let sourceRect = sender.window?.convertToScreen(sender.frame) {
				
					behavior = .transient
//					animates = false
					

					PSTL_showRelativeToRect(.zero, ofView: sender, preferredEdge: .maxYEdge)
					DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
						self.contentSize = CGSize(width:246, height:380)

						self.positioningRect = sender.bounds
					}
				}
				
			}
		}
		else {
			PSTL_showRelativeToRect(rect, ofView: ofView, preferredEdge: preferredEdge)
		}
	}
	
	
}

var PSTLStatusItem = NSStatusItem()

class PSTLNativeStatusItemController: NSObject {
	
	static let shared = PSTLNativeStatusItemController()
	
	@objc class func sharedInstance() -> PSTLNativeStatusItemController {
		return PSTLNativeStatusItemController.shared
	}
	
	override init() {
		super.init()
		
		PSTLStatusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.squareLength)
		
		let image = NSImage(named: "PickerWheel")
		image?.isTemplate = true
		PSTLStatusItem.button?.image = image
		
		PSTLStatusItem.button?.target = self
		PSTLStatusItem.button?.action = #selector(menuWillOpen(_:))
		
		let m1 = class_getInstanceMethod(NSClassFromString("NSPopover"), NSSelectorFromString("PSTL_showRelativeToRect:ofView:preferredEdge:"))
		let m2 = class_getInstanceMethod(NSClassFromString("NSPopover"), NSSelectorFromString("showRelativeToRect:ofView:preferredEdge:"))
		
		if let m1 = m1, let m2 = m2 {
			method_exchangeImplementations(m1, m2)
		}
	}
	
	@objc func menuWillOpen(_ sender:NSStatusBarButton) {
	
		NotificationCenter.default.post(name: NSNotification.Name("PSTLShowStandalonePicker"), object: nil)
	}
}

UIKit parts.swift

	@objc func showStandalonePicker(_ sender:Any) {

		for scene in UIApplication.shared.connectedScenes {
			
			if let sceneDelegate = scene.delegate as? PSTLSceneDelegate {
				
				if sceneDelegate.window?.rootViewController?.presentedViewController != nil {
					sceneDelegate.window?.rootViewController?.dismiss(animated: true, completion: nil)
				} else {
					if let window = sceneDelegate.window {
					let v = UIView()
					v.frame = CGRect(x: 0, y: 0, width: 40, height: 40)
						
						menuBarColorPickerViewController.popoverPresentationController?.sourceView = v
						menuBarColorPickerViewController.popoverPresentationController?.sourceRect = v.bounds
						menuBarColorPickerViewController.popoverPresentationController?.permittedArrowDirections = [.any]
						menuBarColorPickerViewController.popoverPresentationController?.canOverlapSourceViewRect = true
						menuBarColorPickerViewController.view.setNeedsLayout()

						window.rootViewController?.present(menuBarColorPickerViewController, animated: true, completion: nil)
					}
				}
			}
		}
	}