surface: make wlr_subsurface_create private

Same as [1], but for wlr_subsurface.

[1]: https://github.com/swaywm/wlroots/pull/2814

include/types/wlr_surface.h

@@ -11,4 +11,10 @@ struct wlr_renderer;
 struct wlr_surface *surface_create(struct wl_client *client,
 	uint32_t version, uint32_t id, struct wlr_renderer *renderer);
 
+/**
+ * Create a new subsurface resource with the provided new ID.
+ */
+struct wlr_subsurface *subsurface_create(struct wlr_surface *surface,
+	struct wlr_surface *parent, uint32_t version, uint32_t id);
+
 #endif

include/wlr/types/wlr_surface.h

@@ -213,14 +213,6 @@ bool wlr_surface_has_buffer(struct wlr_surface *surface);
  */
 struct wlr_texture *wlr_surface_get_texture(struct wlr_surface *surface);
 
-/**
- * Create a new subsurface resource with the provided new ID. If `resource_list`
- * is non-NULL, adds the subsurface's resource to the list.
- */
-struct wlr_subsurface *wlr_subsurface_create(struct wlr_surface *surface,
-		struct wlr_surface *parent, uint32_t version, uint32_t id,
-		struct wl_list *resource_list);
-
 /**
  * Get the root of the subsurface tree for this surface. Can return NULL if
  * a surface in the tree has been destroyed.

types/wlr_compositor.c

@@ -67,8 +67,7 @@ static void subcompositor_handle_get_subsurface(struct wl_client *client,
 		return;
 	}
 
-	wlr_subsurface_create(surface, parent, wl_resource_get_version(resource),
-		id, NULL);
+	subsurface_create(surface, parent, wl_resource_get_version(resource), id);
 }
 
 static const struct wl_subcompositor_interface subcompositor_impl = {

types/wlr_surface.c

@@ -15,7 +15,6 @@
 #include "util/time.h"
 
 #define CALLBACK_VERSION 1
-#define SUBSURFACE_VERSION 1
 
 static int min(int fst, int snd) {
 	if (fst < snd) {
@@ -860,7 +859,6 @@ static struct wlr_subsurface *subsurface_from_resource(
 
 static void subsurface_resource_destroy(struct wl_resource *resource) {
 	struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
-	wl_list_remove(wl_resource_get_link(resource));
 	subsurface_destroy(subsurface);
 }
 
@@ -1133,11 +1131,8 @@ static void subsurface_handle_surface_destroy(struct wl_listener *listener,
 	subsurface_destroy(subsurface);
 }
 
-struct wlr_subsurface *wlr_subsurface_create(struct wlr_surface *surface,
-		struct wlr_surface *parent, uint32_t version, uint32_t id,
-		struct wl_list *resource_list) {
-	assert(version <= SUBSURFACE_VERSION);
-
+struct wlr_subsurface *subsurface_create(struct wlr_surface *surface,
+		struct wlr_surface *parent, uint32_t version, uint32_t id) {
 	struct wl_client *client = wl_resource_get_client(surface->resource);
 
 	struct wlr_subsurface *subsurface =
@@ -1156,8 +1151,7 @@ struct wlr_subsurface *wlr_subsurface_create(struct wlr_surface *surface,
 		return NULL;
 	}
 	wl_resource_set_implementation(subsurface->resource,
-		&subsurface_implementation, subsurface,
-		subsurface_resource_destroy);
+		&subsurface_implementation, subsurface, subsurface_resource_destroy);
 
 	wl_signal_init(&subsurface->events.destroy);
 	wl_signal_init(&subsurface->events.map);
@@ -1176,13 +1170,6 @@ struct wlr_subsurface *wlr_subsurface_create(struct wlr_surface *surface,
 
 	surface->role_data = subsurface;
 
-	struct wl_list *resource_link = wl_resource_get_link(subsurface->resource);
-	if (resource_list != NULL) {
-		wl_list_insert(resource_list, resource_link);
-	} else {
-		wl_list_init(resource_link);
-	}
-
 	wlr_signal_emit_safe(&parent->events.new_subsurface, subsurface);
 
 	return subsurface;