serhiybutz

import UIKit

class DemoViewController: UIViewController {
    @IBOutlet weak var highlightedLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Subscribe this instance of UIViewController to theme notifications
        ThemeManager.shared.register(

serhiybutz

public protocol ThemeModelProtocol {}

public protocol ThemeProtocol: Equatable {
    associatedtype Model: ThemeModelProtocol
    var settings: Model { get }
}

serhiybutz

struct MyThemeSettings: ThemeModelProtocol {
    let appBgColor: UIColor
    let highlightedBgColor: UIColor
    let textColor: UIColor
}

enum MyTheme: ThemeProtocol {
    case light
    case dark
    var settings: MyThemeSettings {

serhiybutz

extension MyThemeSettings {
    static let lightTheme = MyThemeSettings(
        appBgColor: .white,
        highlightedBgColor: .lightGray,
        textColor: .black
    )
    static let darkTheme = MyThemeSettings(
        appBgColor: .gray,
        highlightedBgColor: .darkGray,
        textColor: .white

serhiybutz

protocol TargetAction {
    associatedtype Theme: ThemeProtocol
    func applyTheme(_ theme: Theme)
}

struct AnyTargetActionWrapper<Theme: ThemeProtocol>: TargetAction {
    private let _applyTheme: (Theme) -> ()

    init<Target: AnyObject>(
        target: Target,

serhiybutz

import Foundation

fileprivate var associatedKey = "ThemerTargetActionStorage"

final class TargetActionStorage<Theme: ThemeProtocol> {
    private var targetActions: [AnyTargetActionWrapper<Theme>] = []

    static func setup(for target: Any) -> TargetActionStorage {
        let storage = TargetActionStorage()
        objc_setAssociatedObject(

serhiybutz

import Foundation

final class Themer<Theme: ThemeProtocol> {
    typealias TargetActionStorageType = TargetActionStorage<Theme>

    private var targetActionStorages = NSHashTable<TargetActionStorageType>
        .weakObjects()

    var theme: Theme {
        didSet {

serhiybutz

extension Themer where Theme == MyTheme {
    private static var instance: Themer?
    static var shared: Themer {
        if instance == nil {
            instance = Themer(defaultTheme: .light)
        }
        return instance!
    }
}

serhiybutz

//
//  TitlePosition.swift
//  PileCollectionVC
//
//  Created by Rik Ki on 11/9/18.
//  Copyright © 2018 Rik Ki. All rights reserved.
//

import Foundation

serhiybutz

//
//  AutosizingTextField.swift
//
//  Created by Serge Bouts on 6/4/20.
//  Copyright © 2020 Rik Ki. All rights reserved.
//

import Cocoa

final class AutosizingTextField: NSTextField {