x11 -> xwayland, window -> surface, fix some calloc sizes and wrong types

3 files changed, 139 insertions, 122 deletions

diff --git a/xwayland/xwayland.c b/xwayland/xwayland.c
index 6a521393..d3bb41a0 100644
--- a/xwayland/xwayland.c
+++ b/xwayland/xwayland.c
@@ -86,7 +86,7 @@ static void exec_xwayland(struct wlr_xwayland *wlr_xwayland) {
 		_exit(EXIT_FAILURE);
 	}
 
-	if (clearenv()) {	    
+	if (clearenv()) {
 		wlr_log_errno(L_ERROR, "clearenv failed");
 		_exit(EXIT_FAILURE);
 	}
@@ -105,7 +105,7 @@ static void exec_xwayland(struct wlr_xwayland *wlr_xwayland) {
 }
 
 static bool wlr_xwayland_init(struct wlr_xwayland *wlr_xwayland,
-		struct wl_display *wl_display, struct wlr_compositor *compositor);
+	struct wl_display *wl_display, struct wlr_compositor *compositor);
 static void wlr_xwayland_finish(struct wlr_xwayland *wlr_xwayland);
 
 static void xwayland_destroy_event(struct wl_listener *listener, void *data) {
@@ -193,7 +193,7 @@ static bool wlr_xwayland_init(struct wlr_xwayland *wlr_xwayland,
 	wlr_xwayland->x_fd[0] = wlr_xwayland->x_fd[1] = -1;
 	wlr_xwayland->wl_fd[0] = wlr_xwayland->wl_fd[1] = -1;
 	wlr_xwayland->wm_fd[0] = wlr_xwayland->wm_fd[1] = -1;
-	wl_list_init(&wlr_xwayland->displayable_windows);
+	wl_list_init(&wlr_xwayland->displayable_surfaces);
 	wl_signal_init(&wlr_xwayland->events.new_surface);
 
 	wlr_xwayland->display = open_display_sockets(wlr_xwayland->x_fd);
diff --git a/xwayland/xwm.c b/xwayland/xwm.c
index bda9f882..1feb4bd0 100644
--- a/xwayland/xwm.c
+++ b/xwayland/xwm.c
@@ -7,51 +7,52 @@
 
 /* General helpers */
 // TODO: replace this with hash table?
-static struct wlr_x11_window *lookup_window(struct wl_list *list, xcb_window_t window_id) {
-	struct wlr_x11_window *window;
-	wl_list_for_each(window, list, link) {
-		if (window->window_id == window_id) {
-			return window;
+static struct wlr_xwayland_surface *lookup_surface(struct wl_list *list,
+		xcb_window_t window_id) {
+	struct wlr_xwayland_surface *surface;
+	wl_list_for_each(surface, list, link) {
+		if (surface->window_id == window_id) {
+			return surface;
 		}
 	}
 	return NULL;
 }
 
-static struct wlr_x11_window *lookup_window_any(struct wlr_xwm *xwm, xcb_window_t window_id) {
-	struct wlr_x11_window *window;
-	if ((window = lookup_window(&xwm->xwayland->displayable_windows, window_id)) ||
-			(window = lookup_window(&xwm->unpaired_windows, window_id)) ||
-			(window = lookup_window(&xwm->new_windows, window_id))) {
-		return window;
+static struct wlr_xwayland_surface *lookup_surface_any(struct wlr_xwm *xwm,
+		xcb_window_t window_id) {
+	struct wlr_xwayland_surface *surface;
+	if ((surface = lookup_surface(&xwm->xwayland->displayable_surfaces, window_id)) ||
+			(surface = lookup_surface(&xwm->unpaired_surfaces, window_id)) ||
+			(surface = lookup_surface(&xwm->new_surfaces, window_id))) {
+		return surface;
 	}
 	return NULL;
 }
 
-static struct wlr_x11_window *wlr_x11_window_create(struct wlr_xwm *xwm,
-		xcb_window_t window_id, int16_t x, int16_t y,
+static struct wlr_xwayland_surface *wlr_xwayland_surface_create(
+		struct wlr_xwm *xwm, xcb_window_t window_id, int16_t x, int16_t y,
 		uint16_t width, uint16_t height, bool override_redirect) {
-	struct wlr_x11_window *window;
-
-	window = calloc(1, sizeof(struct wlr_x11_window));
-	if (!window) {
-		wlr_log(L_ERROR, "Could not allocate wlr x11 window");
+	struct wlr_xwayland_surface *surface =
+		calloc(1, sizeof(struct wlr_xwayland_surface));
+	if (!surface) {
+		wlr_log(L_ERROR, "Could not allocate wlr xwayland surface");
 		return NULL;
 	}
-	window->window_id = window_id;
-	window->x = x;
-	window->y = y;
-	window->width = width;
-	window->height = height;
-	window->override_redirect = override_redirect;
-	wl_list_insert(&xwm->new_windows, &window->link);
-	wl_signal_init(&window->events.destroy);
-	return window;
+	surface->window_id = window_id;
+	surface->x = x;
+	surface->y = y;
+	surface->width = width;
+	surface->height = height;
+	surface->override_redirect = override_redirect;
+	wl_list_insert(&xwm->new_surfaces, &surface->link);
+	wl_signal_init(&surface->events.destroy);
+	return surface;
 }
 
-static void wlr_x11_window_destroy(struct wlr_x11_window *window) {
-	wl_signal_emit(&window->events.destroy, window);
-	wl_list_remove(&window->link);
-	free(window);
+static void wlr_xwayland_surface_destroy(struct wlr_xwayland_surface *surface) {
+	wl_signal_emit(&surface->events.destroy, surface);
+	wl_list_remove(&surface->link);
+	free(surface);
 }
 
 /* xcb helpers */
@@ -69,106 +70,117 @@ static bool xcb_call(struct wlr_xwm *xwm, const char *func, uint32_t line,
 	return false;
 }
 
-static void map_shell_surface(struct wlr_xwm *xwm, struct wlr_x11_window *window,
+static void map_shell_surface(struct wlr_xwm *xwm,
+		struct wlr_xwayland_surface *xwayland_surface,
 		struct wlr_surface *surface) {
 	// get xcb geometry for depth = alpha channel
-	window->surface = surface;
+	xwayland_surface->surface = surface;
 
-	wl_list_remove(&window->link);
-	wl_list_insert(&xwm->xwayland->displayable_windows, &window->link);
-	wl_signal_emit(&xwm->xwayland->events.new_surface, window);
+	wl_list_remove(&xwayland_surface->link);
+	wl_list_insert(&xwm->xwayland->displayable_surfaces,
+		&xwayland_surface->link);
+	wl_signal_emit(&xwm->xwayland->events.new_surface, xwayland_surface);
 }
 
 /* xcb event handlers */
-static void handle_create_notify(struct wlr_xwm *xwm, xcb_create_notify_event_t *ev) {
+static void handle_create_notify(struct wlr_xwm *xwm,
+		xcb_create_notify_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_CREATE_NOTIFY (%u)", ev->window);
-	wlr_x11_window_create(xwm, ev->window, ev->x, ev->y,
+	wlr_xwayland_surface_create(xwm, ev->window, ev->x, ev->y,
 		ev->width, ev->height, ev->override_redirect);
 }
 
-static void handle_destroy_notify(struct wlr_xwm *xwm, xcb_destroy_notify_event_t *ev) {
-	struct wlr_x11_window *window;
+static void handle_destroy_notify(struct wlr_xwm *xwm,
+		xcb_destroy_notify_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_DESTROY_NOTIFY (%u)", ev->window);
-	if (!(window = lookup_window_any(xwm, ev->window))) {
+	struct wlr_xwayland_surface *surface = lookup_surface_any(xwm, ev->window);
+	if (surface == NULL) {
 		return;
 	}
-	wlr_x11_window_destroy(window);
+	wlr_xwayland_surface_destroy(surface);
 }
 
-static void handle_configure_request(struct wlr_xwm *xwm, xcb_configure_request_event_t *ev) {
-	struct wlr_x11_window *window;
+static void handle_configure_request(struct wlr_xwm *xwm,
+		xcb_configure_request_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_CONFIGURE_REQUEST (%u) [%ux%u+%d,%d]", ev->window,
 		ev->width, ev->height, ev->x, ev->y);
-	if (!(window = lookup_window_any(xwm, ev->window))) {
+	struct wlr_xwayland_surface *surface = lookup_surface_any(xwm, ev->window);
+	if (surface == NULL) {
 		return;
 	}
 
-	window->x = ev->x;
-	window->y = ev->y;
-	window->width = ev->width;
-	window->height = ev->height;
+	surface->x = ev->x;
+	surface->y = ev->y;
+	surface->width = ev->width;
+	surface->height = ev->height;
 	// handle parent/sibling?
 
-	uint32_t values[] = { ev->x, ev->y, ev->width, ev->height, 0 };
+	uint32_t values[] = {ev->x, ev->y, ev->width, ev->height, 0};
 	uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
 		XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
 		XCB_CONFIG_WINDOW_BORDER_WIDTH;
 	xcb_configure_window(xwm->xcb_conn, ev->window, mask, values);
 }
 
-static void handle_map_request(struct wlr_xwm *xwm, xcb_map_request_event_t *ev) {
+static void handle_map_request(struct wlr_xwm *xwm,
+		xcb_map_request_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_MAP_REQUEST (%u)", ev->window);
+	const uint32_t value_list = XCB_EVENT_MASK_FOCUS_CHANGE |
+		XCB_EVENT_MASK_PROPERTY_CHANGE;
 	XCB_CALL(xwm, xcb_change_window_attributes_checked(xwm->xcb_conn,
-			ev->window, XCB_CW_EVENT_MASK,
-			&(uint32_t){XCB_EVENT_MASK_FOCUS_CHANGE | XCB_EVENT_MASK_PROPERTY_CHANGE}));
+		ev->window, XCB_CW_EVENT_MASK, &value_list));
 	XCB_CALL(xwm, xcb_map_window_checked(xwm->xcb_conn, ev->window));
 }
 
 static void handle_map_notify(struct wlr_xwm *xwm, xcb_map_notify_event_t *ev) {
-	struct wlr_x11_window *window;
 	wlr_log(L_DEBUG, "XCB_MAP_NOTIFY (%u)", ev->window);
-	if ((window = lookup_window_any(xwm, ev->window))) {
-		window->override_redirect = ev->override_redirect;
+	struct wlr_xwayland_surface *surface = lookup_surface_any(xwm, ev->window);
+	if (surface != NULL) {
+		surface->override_redirect = ev->override_redirect;
 	} else {
-		wlr_x11_window_create(xwm, ev->window, 0, 0, 1, 1, ev->override_redirect);
+		wlr_xwayland_surface_create(xwm, ev->window, 0, 0, 1, 1,
+			ev->override_redirect);
 	}
 }
 
-static void handle_unmap_notify(struct wlr_xwm *xwm, xcb_unmap_notify_event_t *ev) {
-	struct wlr_x11_window *window;
+static void handle_unmap_notify(struct wlr_xwm *xwm,
+		xcb_unmap_notify_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_UNMAP_NOTIFY (%u)", ev->window);
-	if (!(window = lookup_window_any(xwm, ev->window))) {
+	struct wlr_xwayland_surface *surface = lookup_surface_any(xwm, ev->window);
+	if (surface == NULL) {
 		return;
 	}
-	// remove pointer to surface only?
-	wlr_x11_window_destroy(window);
+	// TODO: remove pointer to surface only?
+	wlr_xwayland_surface_destroy(surface);
 }
 
-static void handle_property_notify(struct wlr_xwm *xwm, xcb_property_notify_event_t *ev) {
+static void handle_property_notify(struct wlr_xwm *xwm,
+		xcb_property_notify_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_PROPERTY_NOTIFY (%u)", ev->window);
 	// TODO lookup window & get properties
 }
 
-static void handle_client_message(struct wlr_xwm *xwm, xcb_client_message_event_t *ev) {
+static void handle_client_message(struct wlr_xwm *xwm,
+		xcb_client_message_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_CLIENT_MESSAGE (%u)", ev->window);
 
 	if (ev->type == xwm->atoms[WL_SURFACE_ID]) {
-		struct wlr_x11_window *window;
-		struct wl_resource *resource;
-		window = lookup_window(&xwm->new_windows, ev->window);
-		if (!window) {
+		struct wlr_xwayland_surface *surface = lookup_surface(
+			&xwm->new_surfaces, ev->window);
+		if (surface == NULL) {
 			wlr_log(L_DEBUG, "client message WL_SURFACE_ID but no new window %u ?",
 				ev->window);
 			return;
 		}
-		window->surface_id = ev->data.data32[0];
+		surface->surface_id = ev->data.data32[0];
 		/* Check if we got notified after wayland surface create event */
-		resource = wl_client_get_object(xwm->xwayland->client, window->surface_id);
+		struct wl_resource *resource = wl_client_get_object(
+			xwm->xwayland->client, surface->surface_id);
 		if (resource) {
-			map_shell_surface(xwm, window, wl_resource_get_user_data(resource));
+			map_shell_surface(xwm, surface, wl_resource_get_user_data(resource));
 		} else {
-			wl_list_remove(&window->link);
-			wl_list_insert(&xwm->unpaired_windows, &window->link);
+			wl_list_remove(&surface->link);
+			wl_list_insert(&xwm->unpaired_surfaces, &surface->link);
 		}
 	}
 	wlr_log(L_DEBUG, "unhandled client message %u", ev->type);
@@ -224,20 +236,19 @@ static int x11_event_handler(int fd, uint32_t mask, void *data) {
 
 static void create_surface_handler(struct wl_listener *listener, void *data) {
 	struct wlr_surface *surface = data;
-	struct wlr_xwm *xwm = wl_container_of(listener, xwm, surface_create_listener);
-	struct wlr_x11_window *window;
-	uint32_t surface_id;
-
+	struct wlr_xwm *xwm = wl_container_of(listener, xwm,
+		surface_create_listener);
 	if (wl_resource_get_client(surface->resource) != xwm->xwayland->client) {
 		return;
 	}
 
 	wlr_log(L_DEBUG, "New x11 surface: %p", surface);
 
-	surface_id = wl_resource_get_id(surface->resource);
-	wl_list_for_each(window, &xwm->unpaired_windows, link) {
-		if (window->surface_id == surface_id) {
-			map_shell_surface(xwm, window, surface);
+	uint32_t surface_id = wl_resource_get_id(surface->resource);
+	struct wlr_xwayland_surface *xwayland_surface;
+	wl_list_for_each(xwayland_surface, &xwm->unpaired_surfaces, link) {
+		if (xwayland_surface->surface_id == surface_id) {
+			map_shell_surface(xwm, xwayland_surface, surface);
 			xcb_flush(xwm->xcb_conn);
 			return;
 		}
@@ -273,57 +284,57 @@ static void xcb_get_resources(struct wlr_xwm *xwm) {
 }
 
 static void xcb_init_wm(struct wlr_xwm *xwm) {
-	xcb_screen_iterator_t screen_iterator;
-	screen_iterator = xcb_setup_roots_iterator(xcb_get_setup(xwm->xcb_conn));
+	xcb_screen_iterator_t screen_iterator =
+		xcb_setup_roots_iterator(xcb_get_setup(xwm->xcb_conn));
 	xwm->screen = screen_iterator.data;
 
 	xwm->window = xcb_generate_id(xwm->xcb_conn);
 
 	uint32_t values[] = {
-		XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | 
+		XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY |
 			XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
 			XCB_EVENT_MASK_PROPERTY_CHANGE,
 		/* xwm->cursor, */
 	};
-	XCB_CALL(xwm, xcb_change_window_attributes_checked(xwm->xcb_conn, xwm->screen->root,
-			XCB_CW_EVENT_MASK /* | XCB_CW_CURSOR */, values));
+	XCB_CALL(xwm, xcb_change_window_attributes_checked(xwm->xcb_conn,
+		xwm->screen->root, XCB_CW_EVENT_MASK /* | XCB_CW_CURSOR */, values));
 	XCB_CALL(xwm, xcb_composite_redirect_subwindows_checked(xwm->xcb_conn,
-			xwm->screen->root, XCB_COMPOSITE_REDIRECT_MANUAL));
+		xwm->screen->root, XCB_COMPOSITE_REDIRECT_MANUAL));
 
 	XCB_CALL(xwm, xcb_create_window_checked(xwm->xcb_conn, XCB_COPY_FROM_PARENT,
-			xwm->window, xwm->screen->root, 0, 0, 1, 1, 0,
-			XCB_WINDOW_CLASS_INPUT_OUTPUT, xwm->screen->root_visual,
-			XCB_CW_EVENT_MASK, (uint32_t[]){XCB_EVENT_MASK_PROPERTY_CHANGE}));
+		xwm->window, xwm->screen->root, 0, 0, 1, 1, 0,
+		XCB_WINDOW_CLASS_INPUT_OUTPUT, xwm->screen->root_visual,
+		XCB_CW_EVENT_MASK, (uint32_t[]){XCB_EVENT_MASK_PROPERTY_CHANGE}));
 	xcb_atom_t supported[] = {
 		xwm->atoms[NET_WM_STATE],
 	};
-	XCB_CALL(xwm, xcb_change_property_checked(xwm->xcb_conn, XCB_PROP_MODE_REPLACE,
-			xwm->screen->root, xwm->atoms[NET_SUPPORTED], XCB_ATOM_ATOM,
-			32, sizeof(supported)/sizeof(*supported), supported));
+	XCB_CALL(xwm, xcb_change_property_checked(xwm->xcb_conn,
+		XCB_PROP_MODE_REPLACE, xwm->screen->root, xwm->atoms[NET_SUPPORTED],
+		XCB_ATOM_ATOM, 32, sizeof(supported)/sizeof(*supported), supported));
 
 	XCB_CALL(xwm, xcb_set_selection_owner_checked(xwm->xcb_conn, xwm->window,
-			xwm->atoms[WM_S0], XCB_CURRENT_TIME));
+		xwm->atoms[WM_S0], XCB_CURRENT_TIME));
 	XCB_CALL(xwm, xcb_set_selection_owner_checked(xwm->xcb_conn, xwm->window,
-			xwm->atoms[NET_WM_S0], XCB_CURRENT_TIME));
+		xwm->atoms[NET_WM_S0], XCB_CURRENT_TIME));
 	xcb_flush(xwm->xcb_conn);
 }
 
-void wlr_x11_window_activate(struct wlr_xwayland *wlr_xwayland,
-		struct wlr_x11_window *window) {
+void wlr_xwayland_surface_activate(struct wlr_xwayland *wlr_xwayland,
+		struct wlr_xwayland_surface *surface) {
 	struct wlr_xwm *xwm = wlr_xwayland->xwm;
 	xcb_client_message_event_t m = {0};
 	m.response_type = XCB_CLIENT_MESSAGE;
 	m.format = 32;
-	m.window = window->window_id;
+	m.window = surface->window_id;
 	m.type = xwm->atoms[WM_PROTOCOLS];
 	m.data.data32[0] = xwm->atoms[WM_TAKE_FOCUS];
 	m.data.data32[1] = XCB_TIME_CURRENT_TIME;
-	xcb_send_event_checked(xwm->xcb_conn, 0, window->window_id,
-			XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT, (char*)&m);
+	xcb_send_event_checked(xwm->xcb_conn, 0, surface->window_id,
+		XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT, (char*)&m);
 	xcb_set_input_focus_checked(xwm->xcb_conn, XCB_INPUT_FOCUS_POINTER_ROOT,
-			window->window_id, XCB_CURRENT_TIME);
-	xcb_configure_window_checked(xwm->xcb_conn, window->window_id,
-			XCB_CONFIG_WINDOW_STACK_MODE, (uint32_t[]){XCB_STACK_MODE_ABOVE});
+		surface->window_id, XCB_CURRENT_TIME);
+	xcb_configure_window_checked(xwm->xcb_conn, surface->window_id,
+		XCB_CONFIG_WINDOW_STACK_MODE, (uint32_t[]){XCB_STACK_MODE_ABOVE});
 	xcb_flush(xwm->xcb_conn);
 }
 
@@ -334,15 +345,16 @@ void xwm_destroy(struct wlr_xwm *xwm) {
 	if (xwm->event_source) {
 		wl_event_source_remove(xwm->event_source);
 	}
-	struct wlr_x11_window *window, *tmp;
-	wl_list_for_each_safe(window, tmp, &xwm->xwayland->displayable_windows, link) {
-		wlr_x11_window_destroy(window);
+	struct wlr_xwayland_surface *surface, *tmp;
+	wl_list_for_each_safe(surface, tmp, &xwm->xwayland->displayable_surfaces,
+			link) {
+		wlr_xwayland_surface_destroy(surface);
 	}
-	wl_list_for_each_safe(window, tmp, &xwm->new_windows, link) {
-		wlr_x11_window_destroy(window);
+	wl_list_for_each_safe(surface, tmp, &xwm->new_surfaces, link) {
+		wlr_xwayland_surface_destroy(surface);
 	}
-	wl_list_for_each_safe(window, tmp, &xwm->unpaired_windows, link) {
-		wlr_x11_window_destroy(window);
+	wl_list_for_each_safe(surface, tmp, &xwm->unpaired_surfaces, link) {
+		wlr_xwayland_surface_destroy(surface);
 	}
 	wl_list_remove(&xwm->surface_create_listener.link);
 	xcb_disconnect(xwm->xcb_conn);
@@ -352,22 +364,27 @@ void xwm_destroy(struct wlr_xwm *xwm) {
 
 struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland) {
 	struct wlr_xwm *xwm = calloc(1, sizeof(struct wlr_xwm));
-	int rc;
+	if (xwm == NULL) {
+		return NULL;
+	}
 
 	xwm->xwayland = wlr_xwayland;
-	wl_list_init(&xwm->new_windows);
-	wl_list_init(&xwm->unpaired_windows);
+	wl_list_init(&xwm->new_surfaces);
+	wl_list_init(&xwm->unpaired_surfaces);
 
 	xwm->xcb_conn = xcb_connect_to_fd(wlr_xwayland->wm_fd[0], NULL);
-	if ((rc = xcb_connection_has_error(xwm->xcb_conn))) {
+
+	int rc = xcb_connection_has_error(xwm->xcb_conn);
+	if (rc) {
 		wlr_log(L_ERROR, "xcb connect failed: %d", rc);
 		free(xwm);
 		return NULL;
 	}
 
-	struct wl_event_loop *event_loop = wl_display_get_event_loop(wlr_xwayland->wl_display);
+	struct wl_event_loop *event_loop = wl_display_get_event_loop(
+		wlr_xwayland->wl_display);
 	xwm->event_source = wl_event_loop_add_fd(event_loop, wlr_xwayland->wm_fd[0],
-			WL_EVENT_READABLE, x11_event_handler, xwm);
+		WL_EVENT_READABLE, x11_event_handler, xwm);
 	// probably not needed
 	// wl_event_source_check(xwm->event_source);
 
@@ -378,7 +395,7 @@ struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland) {
 
 	xwm->surface_create_listener.notify = create_surface_handler;
 	wl_signal_add(&wlr_xwayland->compositor->events.create_surface,
-			&xwm->surface_create_listener);
+		&xwm->surface_create_listener);
 
 	return xwm;
 }
diff --git a/xwayland/xwm.h b/xwayland/xwm.h
index 7fc6f3bf..869eb303 100644
--- a/xwayland/xwm.h
+++ b/xwayland/xwm.h
@@ -75,8 +75,8 @@ struct wlr_xwm {
 	xcb_screen_t *screen;
 	xcb_window_t window;
 
-	struct wl_list new_windows;
-	struct wl_list unpaired_windows;
+	struct wl_list new_surfaces;
+	struct wl_list unpaired_surfaces;
 };
 
 void xwm_destroy(struct wlr_xwm *xwm);