seat: use WL_SEAT_ERROR_CAPABILITY

Depends on [1].

[1]: https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/79

meson.build

@@ -89,7 +89,7 @@ conf_data.set10('WLR_HAS_XCB_ERRORS', false)
 conf_data.set10('WLR_HAS_XCB_ICCCM', false)
 conf_data.set10('WLR_HAS_XDG_FOREIGN', false)
 
-wayland_server = dependency('wayland-server', version: '>=1.18')
+wayland_server = dependency('wayland-server', version: '>=1.19')
 wayland_client = dependency('wayland-client')
 wayland_protos = dependency('wayland-protocols', version: '>=1.17')
 egl = dependency('egl')

types/seat/wlr_seat.c

@@ -20,7 +20,7 @@ static void seat_handle_get_pointer(struct wl_client *client,
 	struct wlr_seat_client *seat_client =
 		wlr_seat_client_from_resource(seat_resource);
 	if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_POINTER)) {
-		wl_resource_post_error(seat_resource, 0,
+		wl_resource_post_error(seat_resource, WL_SEAT_ERROR_MISSING_CAPABILITY,
 				"wl_seat.get_pointer called when no pointer capability has existed");
 		return;
 	}
@@ -34,7 +34,7 @@ static void seat_handle_get_keyboard(struct wl_client *client,
 	struct wlr_seat_client *seat_client =
 		wlr_seat_client_from_resource(seat_resource);
 	if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_KEYBOARD)) {
-		wl_resource_post_error(seat_resource, 0,
+		wl_resource_post_error(seat_resource, WL_SEAT_ERROR_MISSING_CAPABILITY,
 				"wl_seat.get_keyboard called when no keyboard capability has existed");
 		return;
 	}
@@ -48,7 +48,7 @@ static void seat_handle_get_touch(struct wl_client *client,
 	struct wlr_seat_client *seat_client =
 		wlr_seat_client_from_resource(seat_resource);
 	if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_TOUCH)) {
-		wl_resource_post_error(seat_resource, 0,
+		wl_resource_post_error(seat_resource, WL_SEAT_ERROR_MISSING_CAPABILITY,
 				"wl_seat.get_touch called when no touch capability has existed");
 		return;
 	}