45 lines
1.4 KiB
Swift
45 lines
1.4 KiB
Swift
// SPDX-FileCopyrightText: 2026 Kaede Akino
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// SPDX-License-Identifier: GPL-3.0-only
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import AppKit
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/// Keeps SwiftUI, native controls, and terminal surfaces on one inherited appearance.
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@MainActor
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final class AppAppearanceController {
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private let defaults = UserDefaults.standard
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private let notifications = NotificationCenter.default
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private var observer: (any NSObjectProtocol)?
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private var appliedAppearance: AppAppearance?
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isolated deinit {
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if let observer { notifications.removeObserver(observer) }
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}
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func start() {
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guard observer == nil else { return }
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observer = notifications.addObserver(
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forName: UserDefaults.didChangeNotification, object: defaults, queue: .main
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) { [weak self] _ in
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MainActor.assumeIsolated { self?.refresh() }
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}
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refresh()
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}
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func stop() {
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if let observer { notifications.removeObserver(observer) }
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observer = nil
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appliedAppearance = nil
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}
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private func refresh() {
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let selection = AppAppearance.stored(in: defaults)
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guard selection != appliedAppearance else { return }
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appliedAppearance = selection
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switch selection {
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case .system: NSApp.appearance = nil
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case .light: NSApp.appearance = NSAppearance(named: .aqua)
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case .dark: NSApp.appearance = NSAppearance(named: .darkAqua)
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}
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}
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}
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