feat: add is_menu_visible (#108)

.changes/is_menu_visible.md

@@ -0,0 +1,5 @@
+---
+"tao": patch
+---
+
+Add `is_menu_visilbe` getter on `Window`

src/platform_impl/android/mod.rs

@@ -630,6 +630,11 @@ impl Window {
 
   pub fn show_menu(&self) {}
 
+  pub fn is_menu_visible(&self) -> bool {
+    warn!("`Window::is_menu_visible` is ignored on Android");
+    false
+  }
+
   pub fn set_cursor_icon(&self, _: window::CursorIcon) {}
 
   pub fn set_cursor_position(&self, _: Position) -> Result<(), error::ExternalError> {

src/platform_impl/ios/window.rs

@@ -308,6 +308,11 @@ impl Inner {
     warn!("`Window::show_menu` is ignored on iOS")
   }
 
+  pub fn is_menu_visible(&self) -> bool {
+    warn!("`Window::is_menu_visible` is ignored on iOS");
+    false
+  }
+
   // Allow directly accessing the current monitor internally without unwrapping.
   fn current_monitor_inner(&self) -> RootMonitorHandle {
     unsafe {

src/platform_impl/linux/window.rs

@@ -587,6 +587,10 @@ impl Window {
     self.menu_bar.show_all();
   }
 
+  pub fn is_menu_visible(&self) -> bool {
+    self.menu_bar.get_visible()
+  }
+
   pub fn set_cursor_icon(&self, cursor: CursorIcon) {
     if let Err(e) = self
       .window_requests_tx

src/platform_impl/macos/window.rs

@@ -1026,6 +1026,12 @@ impl UnownedWindow {
   #[inline]
   pub fn show_menu(&self) {}
 
+  #[inline]
+  pub fn is_menu_visible(&self) -> bool {
+    warn!("`Window::is_menu_visible` always return true on macOS");
+    true
+  }
+
   #[inline]
   // Allow directly accessing the current monitor internally without unwrapping.
   pub(crate) fn current_monitor_inner(&self) -> RootMonitorHandle {

src/platform_impl/windows/window.rs

@@ -749,6 +749,11 @@ impl Window {
     }
   }
 
+  #[inline]
+  pub fn is_menu_visible(&self) -> bool {
+    unsafe { winuser::GetMenu(self.hwnd()) != ptr::null_mut() }
+  }
+
   #[inline]
   pub fn reset_dead_keys(&self) {
     // `ToUnicode` consumes the dead-key by default, so we are constructing a fake (but valid)

src/window.rs

@@ -820,6 +820,16 @@ impl Window {
   pub fn show_menu(&self) {
     self.window.show_menu();
   }
+
+  /// Gets the visibilty of the window menu.
+  ///
+  /// ## Platform-specific
+  ///
+  /// - **iOS / Android:** Unsupported.
+  /// - **macOS:** Always return true, as the menu is always visible.
+  pub fn is_menu_visible(&self) -> bool {
+    self.window.is_menu_visible()
+  }
 }
 
 /// Cursor functions.