macos: confirm on quit

macos/Ghostty.xcodeproj/project.pbxproj

@@ -20,6 +20,7 @@
 		A5CEAFDE29B8058B00646FDA /* SplitView.Divider.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5CEAFDD29B8058B00646FDA /* SplitView.Divider.swift */; };
 		A5CEAFFF29C2410700646FDA /* Backport.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5CEAFFE29C2410700646FDA /* Backport.swift */; };
 		A5D495A2299BEC7E00DD1313 /* GhosttyKit.xcframework in Frameworks */ = {isa = PBXBuildFile; fileRef = A5D495A1299BEC7E00DD1313 /* GhosttyKit.xcframework */; };
+		A5FECBD729D1FC3900022361 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5FECBD629D1FC3900022361 /* ContentView.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -38,6 +39,7 @@
 		A5CEAFDD29B8058B00646FDA /* SplitView.Divider.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SplitView.Divider.swift; sourceTree = "<group>"; };
 		A5CEAFFE29C2410700646FDA /* Backport.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Backport.swift; sourceTree = "<group>"; };
 		A5D495A1299BEC7E00DD1313 /* GhosttyKit.xcframework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcframework; path = GhosttyKit.xcframework; sourceTree = "<group>"; };
+		A5FECBD629D1FC3900022361 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -63,6 +65,7 @@
 				A55685DF29A03A9F004303CE /* AppError.swift */,
 				A59444F629A2ED5200725BBA /* SettingsView.swift */,
 				A5CEAFFE29C2410700646FDA /* Backport.swift */,
+				A5FECBD629D1FC3900022361 /* ContentView.swift */,
 			);
 			path = Sources;
 			sourceTree = "<group>";
@@ -192,6 +195,7 @@
 			files = (
 				A55B7BBC29B6FC330055DE60 /* SurfaceView.swift in Sources */,
 				A59444F729A2ED5200725BBA /* SettingsView.swift in Sources */,
+				A5FECBD729D1FC3900022361 /* ContentView.swift in Sources */,
 				A55B7BB829B6F53A0055DE60 /* Package.swift in Sources */,
 				A55B7BBE29B701360055DE60 /* Ghostty.SplitView.swift in Sources */,
 				A55B7BB629B6F47F0055DE60 /* AppState.swift in Sources */,

macos/Sources/ContentView.swift

@@ -0,0 +1,48 @@
+import SwiftUI
+import GhosttyKit
+
+struct ContentView: View {
+    let ghostty: Ghostty.AppState
+    
+    @EnvironmentObject private var appDelegate: AppDelegate
+    
+    var body: some View {
+        switch ghostty.readiness {
+        case .loading:
+            Text("Loading")
+                .onChange(of: appDelegate.confirmQuit) { value in
+                    guard value else { return }
+                    NSApplication.shared.reply(toApplicationShouldTerminate: true)
+                }
+        case .error:
+            ErrorView()
+                .onChange(of: appDelegate.confirmQuit) { value in
+                    guard value else { return }
+                    NSApplication.shared.reply(toApplicationShouldTerminate: true)
+                }
+        case .ready:
+            Ghostty.TerminalSplit(onClose: Self.closeWindow)
+                .ghosttyApp(ghostty.app!)
+                .confirmationDialog(
+                    "Quit Ghostty?",
+                    isPresented: $appDelegate.confirmQuit) {
+                        Button("Close Ghostty", role: .destructive) {
+                            NSApplication.shared.reply(toApplicationShouldTerminate: true)
+                        }
+                        .keyboardShortcut(.defaultAction)
+                        
+                        Button("Cancel", role: .cancel) {
+                            NSApplication.shared.reply(toApplicationShouldTerminate: false)
+                        }
+                        .keyboardShortcut(.cancelAction)
+                    } message: {
+                        Text("All terminal sessions will be terminated.")
+                    }
+        }
+    }
+    
+    static func closeWindow() {
+        guard let currentWindow = NSApp.keyWindow else { return }
+        currentWindow.close()
+    }
+}

macos/Sources/GhosttyApp.swift

@@ -18,15 +18,7 @@ struct GhosttyApp: App {
     
     var body: some Scene {
         WindowGroup {
-            switch ghostty.readiness {
+            ContentView(ghostty: ghostty)
-            case .loading:
-                Text("Loading")
-            case .error:
-                ErrorView()
-            case .ready:
-                Ghostty.TerminalSplit(onClose: Self.closeWindow)
-                    .ghosttyApp(ghostty.app!)
-            }
         }
         .backport.defaultSize(width: 800, height: 600)
         .commands {
@@ -110,7 +102,9 @@ struct GhosttyApp: App {
     }
 }
 
-class AppDelegate: NSObject, NSApplicationDelegate {
+class AppDelegate: NSObject, NSApplicationDelegate, ObservableObject {
+    @Published var confirmQuit: Bool = false
+    
     // See CursedMenuManager for more information.
     private var menuManager: CursedMenuManager?
     
@@ -124,6 +118,11 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         // we can't create from SwiftUI.
         menuManager = CursedMenuManager()
     }
+    
+    func applicationShouldTerminate(_ sender: NSApplication) -> NSApplication.TerminateReply {
+        confirmQuit = true
+        return .terminateLater
+    }
 }
 
 /// SwiftUI as of macOS 13.x provides no way to manage the default menu items that are created