fix: handle macOS application reopen event to show main window (AstrBotDevs#113)

* fix: handle macOS application reopen event to show main window

* fix: Guard macOS reopen logic with cfg

Author: Aster-amellus

src-tauri/src/app_runtime.rs

@@ -125,6 +125,11 @@ fn configure_setup(builder: Builder<tauri::Wry>) -> Builder<tauri::Wry> {
 
 fn handle_run_event(app_handle: &tauri::AppHandle, event: RunEvent) {
     match app_runtime_events::run_event_action(&event) {
+        #[cfg(target_os = "macos")]
+        app_runtime_events::RunEventAction::ShowMainWindow => {
+            append_desktop_log("application reopen requested, showing main window");
+            window::actions::show_main_window(app_handle, DEFAULT_SHELL_LOCALE, append_desktop_log);
+        }
         app_runtime_events::RunEventAction::HandleExitRequested => {
             if let RunEvent::ExitRequested { api, .. } = event {
                 lifecycle::events::handle_exit_requested(app_handle, &api);

src-tauri/src/app_runtime_events.rs

@@ -17,6 +17,8 @@ pub(crate) enum PageLoadAction {
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub(crate) enum RunEventAction {
     None,
+    #[cfg(target_os = "macos")]
+    ShowMainWindow,
     HandleExitRequested,
     HandleExit,
 }
@@ -63,8 +65,22 @@ pub(crate) fn page_load_action(
     }
 }
 
+#[cfg(target_os = "macos")]
+pub(crate) fn reopen_event_action(has_visible_windows: bool) -> RunEventAction {
+    if has_visible_windows {
+        RunEventAction::None
+    } else {
+        RunEventAction::ShowMainWindow
+    }
+}
+
 pub(crate) fn run_event_action(event: &RunEvent) -> RunEventAction {
     match event {
+        #[cfg(target_os = "macos")]
+        RunEvent::Reopen {
+            has_visible_windows,
+            ..
+        } => reopen_event_action(*has_visible_windows),
         RunEvent::ExitRequested { .. } => RunEventAction::HandleExitRequested,
         RunEvent::Exit => RunEventAction::HandleExit,
         _ => RunEventAction::None,
@@ -79,6 +95,9 @@ mod tests {
     };
     use tauri::{webview::PageLoadEvent, RunEvent};
 
+    #[cfg(target_os = "macos")]
+    use super::reopen_event_action;
+
     #[test]
     fn main_window_action_ignores_non_main_windows() {
         assert_eq!(
@@ -119,6 +138,13 @@ mod tests {
         );
     }
 
+    #[cfg(target_os = "macos")]
+    #[test]
+    fn reopen_event_action_shows_main_window_only_when_no_window_is_visible() {
+        assert_eq!(reopen_event_action(false), RunEventAction::ShowMainWindow);
+        assert_eq!(reopen_event_action(true), RunEventAction::None);
+    }
+
     #[test]
     fn run_event_action_maps_exit_events() {
         assert_eq!(