gdk4-macos: manually implement native_window method

For now we need to depend on the cocoa crate in order to implement
this method since it is the only decent crate implementing
the cocoa api.

gdk4-macos/Cargo.toml

@@ -22,6 +22,7 @@ gdk.workspace = true
 gio.workspace = true
 glib.workspace = true
 libc.workspace = true
+cocoa = "0.26"
 
 [dev-dependencies]
 gir-format-check.workspace = true

gdk4-macos/Gir.toml

@@ -17,7 +17,6 @@ generate = [
     "GdkMacos.MacosGLContext",
     "GdkMacos.MacosKeymap",
     "GdkMacos.MacosSeat",
-    "GdkMacos.MacosSurface",
 ]
 
 manual = [
@@ -36,4 +35,11 @@ name = "GdkMacos.MacosMonitor"
 status = "generate"
     [[object.function]]
     name = "get_geometry"
-    ignore = true # The function does not exists
+    ignore = true # The function does not exists
+
+[[object]]
+name = "GdkMacos.MacosSurface"
+status = "generate"
+    [[object.function]]
+    name = "get_native_window"
+    manual = true

gdk4-macos/src/auto/macos_surface.rs

@@ -20,14 +20,6 @@ glib::wrapper! {
 }
 
 impl MacosSurface {
-    //#[cfg(feature = "v4_8")]
-    //#[cfg_attr(docsrs, doc(cfg(feature = "v4_8")))]
-    //#[doc(alias = "gdk_macos_surface_get_native_window")]
-    //#[doc(alias = "get_native_window")]
-    //pub fn native_window(&self) -> /*Unimplemented*/Option<Basic: Pointer> {
-    //    unsafe { TODO: call ffi:gdk_macos_surface_get_native_window() }
-    //}
-
     //pub fn native(&self) -> /*Unimplemented*/Basic: Pointer {
     //    ObjectExt::property(self, "native")
     //}

gdk4-macos/src/lib.rs

@@ -16,3 +16,5 @@ mod auto;
 pub mod prelude;
 
 pub use auto::*;
+
+mod macos_surface;

gdk4-macos/src/macos_surface.rs

@@ -0,0 +1,26 @@
+// Take a look at the license at the top of the repository in the LICENSE file.
+
+#[cfg(feature = "v4_8")]
+use crate::ffi;
+use crate::MacosSurface;
+#[cfg(feature = "v4_8")]
+use cocoa::base::id;
+#[cfg(feature = "v4_8")]
+use glib::translate::*;
+
+impl MacosSurface {
+    #[cfg(feature = "v4_8")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "v4_8")))]
+    #[doc(alias = "gdk_macos_surface_get_native_window")]
+    #[doc(alias = "get_native_window")]
+    pub fn native_window(&self) -> Option<id> {
+        unsafe {
+            let native_window_ptr = ffi::gdk_macos_surface_get_native_window(self.to_glib_none().0);
+            if native_window_ptr.is_null() {
+                None
+            } else {
+                Some(native_window_ptr as id)
+            }
+        }
+    }
+}