wayland: Add WindowExtWayland::xdg_toplevel

src/platform/wayland.rs

@@ -13,6 +13,13 @@
 //! * `wayland-csd-adwaita` (default).
 //! * `wayland-csd-adwaita-crossfont`.
 //! * `wayland-csd-adwaita-notitle`.
+
+use std::ffi::c_void;
+use std::ptr::NonNull;
+
+#[cfg(wayland_platform)]
+use sctk::reexports::client::Proxy;
+
 use crate::event_loop::{ActiveEventLoop, EventLoop, EventLoopBuilder};
 use crate::monitor::MonitorHandle;
 pub use crate::window::Theme;
@@ -73,9 +80,22 @@ impl EventLoopBuilderExtWayland for EventLoopBuilder {
 /// Additional methods on [`Window`] that are specific to Wayland.
 ///
 /// [`Window`]: crate::window::Window
-pub trait WindowExtWayland {}
+pub trait WindowExtWayland {
+    /// Returns `xdg_toplevel` of the window or [`None`] if the window is X11 window.
+    fn xdg_toplevel(&self) -> Option<NonNull<c_void>>;
+}
 
-impl WindowExtWayland for dyn CoreWindow + '_ {}
+#[cfg(wayland_platform)]
+impl WindowExtWayland for dyn CoreWindow + '_ {
+    #[inline]
+    fn xdg_toplevel(&self) -> Option<NonNull<c_void>> {
+        let w = self.as_any().downcast_ref::<crate::platform_impl::wayland::Window>()?;
+        let id = w.xdg_toplevel().id();
+        let ptr = NonNull::new(id.as_ptr().cast()).expect("xdg_toplevel should not be null");
+
+        Some(ptr)
+    }
+}
 
 /// Additional methods on [`WindowAttributes`] that are specific to Wayland.
 pub trait WindowAttributesExtWayland {

src/platform_impl/linux/wayland/window/mod.rs

@@ -8,6 +8,7 @@ use sctk::reexports::client::protocol::wl_display::WlDisplay;
 use sctk::reexports::client::protocol::wl_surface::WlSurface;
 use sctk::reexports::client::{Proxy, QueueHandle};
 use sctk::reexports::protocols::xdg::activation::v1::client::xdg_activation_v1::XdgActivationV1;
+use sctk::reexports::protocols::xdg::shell::client::xdg_toplevel::XdgToplevel;
 use sctk::shell::xdg::window::{Window as SctkWindow, WindowDecorations};
 use sctk::shell::WaylandSurface;
 use tracing::warn;
@@ -239,6 +240,11 @@ impl Window {
     pub fn surface(&self) -> &WlSurface {
         self.window.wl_surface()
     }
+
+    #[inline]
+    pub fn xdg_toplevel(&self) -> &XdgToplevel {
+        self.window.xdg_toplevel()
+    }
 }
 
 impl Drop for Window {