gdk: Manually implement Cursor.new_from_callback

Author: bilelmoussaoui

gdk4/Gir.toml

@@ -376,6 +376,9 @@ status = "generate"
 name = "Gdk.Cursor"
 status = "generate"
 generate_builder = true
+    [[object.function]]
+    name = "new_from_callback"
+    manual = true # handle &mut in the callback
 
 [[object]]
 name = "Gdk.Device"

gdk4/src/auto/cursor.rs

@@ -4,9 +4,6 @@
 
 use crate::Texture;
 use glib::{prelude::*, translate::*};
-#[cfg(feature = "v4_16")]
-#[cfg_attr(docsrs, doc(cfg(feature = "v4_16")))]
-use std::boxed::Box as Box_;
 
 glib::wrapper! {
     #[doc(alias = "GdkCursor")]
@@ -18,63 +15,6 @@ glib::wrapper! {
 }
 
 impl Cursor {
-    #[cfg(feature = "v4_16")]
-    #[cfg_attr(docsrs, doc(cfg(feature = "v4_16")))]
-    #[doc(alias = "gdk_cursor_new_from_callback")]
-    #[doc(alias = "new_from_callback")]
-    pub fn from_callback<P: Fn(&Cursor, i32, f64, i32, i32, i32, i32) -> Texture + 'static>(
-        callback: P,
-        fallback: Option<&Cursor>,
-    ) -> Option<Cursor> {
-        assert_initialized_main_thread!();
-        let callback_data: Box_<P> = Box_::new(callback);
-        unsafe extern "C" fn callback_func<
-            P: Fn(&Cursor, i32, f64, i32, i32, i32, i32) -> Texture + 'static,
-        >(
-            cursor: *mut ffi::GdkCursor,
-            cursor_size: libc::c_int,
-            scale: libc::c_double,
-            width: *mut libc::c_int,
-            height: *mut libc::c_int,
-            hotspot_x: *mut libc::c_int,
-            hotspot_y: *mut libc::c_int,
-            data: glib::ffi::gpointer,
-        ) -> *mut ffi::GdkTexture {
-            let cursor = from_glib_borrow(cursor);
-            let callback = &*(data as *mut P);
-            (*callback)(
-                &cursor,
-                cursor_size,
-                scale,
-                width,
-                height,
-                hotspot_x,
-                hotspot_y,
-            )
-            /*Not checked*/
-            .to_glib_none()
-            .0
-        }
-        let callback = Some(callback_func::<P> as _);
-        unsafe extern "C" fn destroy_func<
-            P: Fn(&Cursor, i32, f64, i32, i32, i32, i32) -> Texture + 'static,
-        >(
-            data: glib::ffi::gpointer,
-        ) {
-            let _callback = Box_::from_raw(data as *mut P);
-        }
-        let destroy_call2 = Some(destroy_func::<P> as _);
-        let super_callback0: Box_<P> = callback_data;
-        unsafe {
-            from_glib_full(ffi::gdk_cursor_new_from_callback(
-                callback,
-                Box_::into_raw(super_callback0) as *mut _,
-                destroy_call2,
-                fallback.to_glib_none().0,
-            ))
-        }
-    }
-
     #[doc(alias = "gdk_cursor_new_from_name")]
     #[doc(alias = "new_from_name")]
     pub fn from_name(name: &str, fallback: Option<&Cursor>) -> Option<Cursor> {

gdk4/src/cursor.rs

@@ -0,0 +1,66 @@
+// Take a look at the license at the top of the repository in the LICENSE file.
+
+use crate::{Cursor, Texture};
+use glib::translate::*;
+use std::boxed::Box as Box_;
+
+impl Cursor {
+    #[cfg(feature = "v4_16")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "v4_16")))]
+    #[doc(alias = "gdk_cursor_new_from_callback")]
+    #[doc(alias = "new_from_callback")]
+    pub fn from_callback<
+        P: Fn(&Cursor, i32, f64, &mut i32, &mut i32, &mut i32, &mut i32) -> Texture + 'static,
+    >(
+        callback: P,
+        fallback: Option<&Cursor>,
+    ) -> Option<Cursor> {
+        assert_initialized_main_thread!();
+        let callback_data: Box_<P> = Box_::new(callback);
+        unsafe extern "C" fn callback_func<
+            P: Fn(&Cursor, i32, f64, &mut i32, &mut i32, &mut i32, &mut i32) -> Texture + 'static,
+        >(
+            cursor: *mut ffi::GdkCursor,
+            cursor_size: libc::c_int,
+            scale: libc::c_double,
+            width: *mut libc::c_int,
+            height: *mut libc::c_int,
+            hotspot_x: *mut libc::c_int,
+            hotspot_y: *mut libc::c_int,
+            data: glib::ffi::gpointer,
+        ) -> *mut ffi::GdkTexture {
+            let cursor = from_glib_borrow(cursor);
+            let callback = &*(data as *mut P);
+            (*callback)(
+                &cursor,
+                cursor_size,
+                scale,
+                &mut *width,
+                &mut *height,
+                &mut *hotspot_x,
+                &mut *hotspot_y,
+            )
+            /*Not checked*/
+            .to_glib_none()
+            .0
+        }
+        let callback = Some(callback_func::<P> as _);
+        unsafe extern "C" fn destroy_func<
+            P: Fn(&Cursor, i32, f64, &mut i32, &mut i32, &mut i32, &mut i32) -> Texture + 'static,
+        >(
+            data: glib::ffi::gpointer,
+        ) {
+            let _callback = Box_::from_raw(data as *mut P);
+        }
+        let destroy_call2 = Some(destroy_func::<P> as _);
+        let super_callback0: Box_<P> = callback_data;
+        unsafe {
+            from_glib_full(ffi::gdk_cursor_new_from_callback(
+                callback,
+                Box_::into_raw(super_callback0) as *mut _,
+                destroy_call2,
+                fallback.to_glib_none().0,
+            ))
+        }
+    }
+}

gdk4/src/lib.rs

@@ -70,6 +70,9 @@ mod content_formats_builder;
 mod content_provider;
 mod content_serializer;
 mod crossing_event;
+#[cfg(feature = "v4_16")]
+#[cfg_attr(docsrs, doc(cfg(feature = "v4_16")))]
+mod cursor;
 mod delete_event;
 mod display;
 #[cfg(feature = "v4_14")]