linux: Fix raw_window_handle method for X11 and Wayland.

crates/gpui/Cargo.toml

@@ -119,6 +119,9 @@ http_client = { workspace = true, features = ["test-support"] }
 unicode-segmentation.workspace = true
 wry = "0.41.0"
 
+[target.'cfg(target_os = "linux")'.dev-dependencies]
+gtk = "0.18.0"
+
 [build-dependencies]
 embed-resource = "3.0"
 

crates/gpui/examples/webview.rs

@@ -35,6 +35,11 @@ impl Render for WebViewWindow {
 }
 
 fn main() {
+    #[cfg(target_os = "linux")]
+    {
+        gtk::init().unwrap();
+    }
+
     App::new().run(|cx: &mut AppContext| {
         let bounds = Bounds::centered(None, size(px(1200.0), px(800.0)), cx);
         let window = cx

crates/gpui/src/platform/linux/wayland/window.rs

@@ -755,7 +755,10 @@ where
 
 impl rwh::HasWindowHandle for WaylandWindow {
     fn window_handle(&self) -> Result<rwh::WindowHandle<'_>, rwh::HandleError> {
-        unimplemented!()
+        let state = self.borrow();
+        let window = NonNull::new(state.surface.id().as_ptr().cast::<c_void>()).unwrap();
+        let handle = rwh::WaylandWindowHandle::new(window);
+        Ok(unsafe { rwh::WindowHandle::borrow_raw(handle.into()) })
     }
 }
 impl rwh::HasDisplayHandle for WaylandWindow {

crates/gpui/src/platform/linux/x11/window.rs

@@ -306,7 +306,8 @@ impl rwh::HasDisplayHandle for RawWindow {
 
 impl rwh::HasWindowHandle for X11Window {
     fn window_handle(&self) -> Result<rwh::WindowHandle, rwh::HandleError> {
-        unimplemented!()
+        let mut handle = rwh::XlibWindowHandle::new(self.0.x_window as u64);
+        Ok(unsafe { rwh::WindowHandle::borrow_raw(handle.into()) })
     }
 }
 impl rwh::HasDisplayHandle for X11Window {