feat(macos): Expose tao event Event::ExitRequested

.changes/macos-dock-exit-requested-event.md

@@ -0,0 +1,7 @@
+---
+'tauri': 'minor:feat'
+'tauri-runtime': 'minor:feat'
+'tauri-runtime-wry': 'minor:feat'
+---
+
+Added `RunEvent::DockExitRequested` handle for dock icon exit on macOS.

crates/tauri-runtime-wry/Cargo.toml

@@ -23,7 +23,7 @@ wry = { version = "0.46.1", default-features = false, features = [
   "os-webview",
   "linux-body",
 ] }
-tao = { version = "0.30.2", default-features = false, features = ["rwh_06"] }
+tao = { version = "0.30.2", default-features = false, features = ["rwh_06"], path = "../../../tao" }
 tauri-runtime = { version = "2.1.0", path = "../tauri-runtime" }
 tauri-utils = { version = "2.0.2", path = "../tauri-utils" }
 raw-window-handle = "0.6"

crates/tauri-runtime-wry/src/lib.rs

@@ -30,6 +30,9 @@ use tauri_runtime::{
   UserEvent, WebviewDispatch, WebviewEventId, WindowDispatch, WindowEventId,
 };
 
+#[cfg(target_os = "macos")]
+#[macro_use]
+extern crate objc2;
 #[cfg(any(target_os = "macos", target_os = "ios"))]
 use objc2::rc::Retained;
 #[cfg(target_os = "macos")]
@@ -3708,6 +3711,25 @@ fn handle_event_loop<T: UserEvent>(
     } => callback(RunEvent::Reopen {
       has_visible_windows,
     }),
+    #[cfg(target_os = "macos")]
+    Event::ExitRequested => {
+      let (tx, rx) = channel();
+      callback(RunEvent::DockExitRequested {tx});
+      let recv = rx.try_recv();
+      let should_prevent = matches!(recv, Ok(ExitRequestedEventAction::Prevent));
+
+      use objc2::ffi::{NO, YES};
+      use objc2_app_kit::NSApplication;
+      use objc2_foundation::MainThreadMarker;
+
+      unsafe {
+        let mtm = MainThreadMarker::new_unchecked();
+        let app = NSApplication::sharedApplication(mtm);
+
+        let action = if should_prevent { NO } else { YES };
+        let () = msg_send![app.as_ref(), replyToApplicationShouldTerminate: action];
+      }
+    }
     _ => (),
   }
 }

crates/tauri-runtime/src/lib.rs

@@ -249,6 +249,11 @@ pub enum RunEvent<T: UserEvent> {
   },
   /// A custom event defined by the user.
   UserEvent(T),
+  /// Emitted when the NSApplicationDelegate's applicationShouldTerminate gets called
+  #[cfg(target_os = "macos")]
+  DockExitRequested {
+    tx: Sender<ExitRequestedEventAction>,
+  },
 }
 
 /// Action to take when the event loop is about to exit

crates/tauri/src/app.rs

@@ -246,6 +246,12 @@ pub enum RunEvent {
     /// Indicates whether the NSApplication object found any visible windows in your application.
     has_visible_windows: bool,
   },
+  /// Emitted when the NSApplicationDelegate's applicationShouldTerminate gets called
+  #[cfg(target_os = "macos")]
+  DockExitRequested {
+    /// Event API
+    api: ExitRequestApi,
+  }
 }
 
 impl From<EventLoopMessage> for RunEvent {
@@ -2236,6 +2242,10 @@ fn on_event_loop_event<R: Runtime>(
     } => RunEvent::Reopen {
       has_visible_windows,
     },
+    #[cfg(target_os = "macos")]
+    RuntimeRunEvent::DockExitRequested { tx } => RunEvent::DockExitRequested {
+      api: ExitRequestApi(tx)
+    },
     _ => unimplemented!(),
   };