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xdg-shell: make wlr_xdg_surface_from_resource reject NULL

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Most resources must not be NULL. Make it so callers need to check for
NULL explicitly. This makes it clearer in the handlers code that the
NULL wl_resource case needs to be handled, and allows callers to make a
difference between a NULL wl_resource and an inert resource.
This commit is contained in:
Simon Ser 2019-12-29 22:42:23 +01:00 • committed by Drew DeVault
parent 7e521fed97
commit 8bb2dc68ea
1 changed files with 4 additions and 5 deletions
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9
types/xdg_shell/wlr_xdg_surface.c
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@ -237,8 +237,10 @@ static void xdg_surface_handle_get_popup(struct wl_client *client,
struct wl_resource *positioner_resource) {
struct wlr_xdg_surface *xdg_surface =
wlr_xdg_surface_from_resource(resource);
struct wlr_xdg_surface *parent =
wlr_xdg_surface_from_resource(parent_resource);
struct wlr_xdg_surface *parent = NULL;
if (parent_resource != NULL) {
parent = wlr_xdg_surface_from_resource(parent_resource);
}
if (xdg_surface == NULL) {
return; // TODO: create an inert xdg_popup
}
@ -517,9 +519,6 @@ void destroy_xdg_surface(struct wlr_xdg_surface *surface) {
struct wlr_xdg_surface *wlr_xdg_surface_from_resource(
struct wl_resource *resource) {
if (!resource) {
return NULL;
}
assert(wl_resource_instance_of(resource, &xdg_surface_interface,
&xdg_surface_implementation));
return wl_resource_get_user_data(resource);