Created
December 12, 2024 10:01
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Swift Monitor Active App Switching
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| import Cocoa | |
| import Foundation | |
| class AppSwitchMonitor { | |
| let workspace = NSWorkspace.shared | |
| var observers: [NSObjectProtocol] = [] | |
| func startMonitoring() { | |
| // Monitor active application changes | |
| let appObserver = workspace.notificationCenter.addObserver( | |
| forName: NSWorkspace.didActivateApplicationNotification, | |
| object: nil, | |
| queue: .main | |
| ) { notification in | |
| if let app = notification.userInfo?[NSWorkspace.applicationUserInfoKey] as? NSRunningApplication { | |
| print("Switched to application: \(app.localizedName ?? "Unknown")") | |
| print(app) | |
| } | |
| } | |
| // Monitor active window changes | |
| let windowObserver = NSWorkspace.shared.notificationCenter.addObserver( | |
| forName: NSWindow.didBecomeKeyNotification, | |
| object: nil, | |
| queue: .main | |
| ) { notification in | |
| if let window = notification.object as? NSWindow { | |
| print("Switched to window: \(window.title)") | |
| } | |
| } | |
| observers.append(contentsOf: [appObserver, windowObserver]) | |
| } | |
| func stopMonitoring() { | |
| observers.forEach { observer in | |
| workspace.notificationCenter.removeObserver(observer) | |
| } | |
| observers.removeAll() | |
| } | |
| } | |
| func handleSIGINT(signal: Int32) { | |
| print("Received SIGINT, stopping monitor...") | |
| monitor.stopMonitoring() | |
| exit(signal) | |
| } | |
| // Create and start the monitor | |
| let monitor = AppSwitchMonitor() | |
| monitor.startMonitoring() | |
| // Set up signal handler for SIGINT | |
| signal(SIGINT, handleSIGINT) | |
| // Keep the program running | |
| RunLoop.main.run() |
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