Refactor and Rename to CommandNotch

Downterm/CommandNotch/AppDelegate.swift

@@ -0,0 +1,73 @@
+import AppKit
+import Combine
+
+/// Application delegate that bootstraps the notch overlay system.
+@MainActor
+class AppDelegate: NSObject, NSApplicationDelegate {
+
+    private var cancellables = Set<AnyCancellable>()
+
+    func applicationDidFinishLaunching(_ notification: Notification) {
+        NotchSettings.registerDefaults()
+        NSApp.setActivationPolicy(.accessory)
+
+        // Sync the launch-at-login toggle with the actual system state
+        // in case the user toggled it from System Settings.
+        UserDefaults.standard.set(LaunchAtLoginHelper.isEnabled, forKey: NotchSettings.Keys.launchAtLogin)
+
+        ScreenManager.shared.start()
+        observeDisplayPreference()
+        observeSizePreferences()
+        observeFontSizeChanges()
+    }
+
+    func applicationWillTerminate(_ notification: Notification) {
+        ScreenManager.shared.stop()
+    }
+
+    // MARK: - Preference observers
+
+    /// Only rebuild windows when the display-count preference changes.
+    private func observeDisplayPreference() {
+        UserDefaults.standard.publisher(for: \.showOnAllDisplays)
+            .removeDuplicates()
+            .dropFirst()
+            .sink { _ in
+                ScreenManager.shared.rebuildWindows()
+            }
+            .store(in: &cancellables)
+    }
+
+    /// Reposition (not rebuild) when any sizing preference changes.
+    private func observeSizePreferences() {
+        NotificationCenter.default.publisher(for: UserDefaults.didChangeNotification)
+            .debounce(for: .milliseconds(300), scheduler: RunLoop.main)
+            .sink { _ in
+                ScreenManager.shared.repositionWindows()
+            }
+            .store(in: &cancellables)
+    }
+
+    /// Live-update terminal font size across all sessions.
+    private func observeFontSizeChanges() {
+        UserDefaults.standard.publisher(for: \.terminalFontSize)
+            .removeDuplicates()
+            .sink { newSize in
+                guard newSize > 0 else { return }
+                TerminalManager.shared.updateAllFontSizes(CGFloat(newSize))
+            }
+            .store(in: &cancellables)
+    }
+}
+
+// MARK: - KVO key paths
+
+private extension UserDefaults {
+    @objc var terminalFontSize: Double {
+        double(forKey: NotchSettings.Keys.terminalFontSize)
+    }
+
+    @objc var showOnAllDisplays: Bool {
+        bool(forKey: NotchSettings.Keys.showOnAllDisplays)
+    }
+}