add xwayland unmanaged tests to support dmenu

This adds `wlr_xwayland_surface_is_unamanged`, to allow compositors more
fine grained control over XWayland focus.
A surface that is unmanaged should not receive focus, while other
windows that are just override redirect may want it (dmenu).
The way unamanged is determined is taken from wlc.

include/rootston/desktop.h

@@ -78,6 +78,7 @@ void view_apply_damage(struct roots_view *view);
 void view_damage_whole(struct roots_view *view);
 void view_update_position(struct roots_view *view, double x, double y);
 void view_update_size(struct roots_view *view, uint32_t width, uint32_t height);
+void view_initial_focus(struct roots_view *view);
 
 void handle_xdg_shell_v6_surface(struct wl_listener *listener, void *data);
 void handle_xdg_shell_surface(struct wl_listener *listener, void *data);

include/wlr/xwayland.h

@@ -186,4 +186,5 @@ void wlr_xwayland_surface_set_fullscreen(struct wlr_xwayland_surface *surface,
 void wlr_xwayland_set_seat(struct wlr_xwayland *xwayland,
 		struct wlr_seat *seat);
 
+bool wlr_xwayland_surface_is_unmanaged(const struct wlr_xwayland_surface *surface);
 #endif

include/wlr/xwm.h

@@ -39,6 +39,12 @@ enum atom_name {
 	INCR,
 	TEXT,
 	TIMESTAMP,
+	NET_WM_WINDOW_TYPE_UTILITY,
+	NET_WM_WINDOW_TYPE_TOOLTIP,
+	NET_WM_WINDOW_TYPE_DND,
+	NET_WM_WINDOW_TYPE_DROPDOWN_MENU,
+	NET_WM_WINDOW_TYPE_POPUP_MENU,
+	NET_WM_WINDOW_TYPE_COMBO,
 	ATOM_LAST,
 };
 
@@ -113,4 +119,7 @@ void xwm_selection_finish(struct wlr_xwm *xwm);
 
 void xwm_set_seat(struct wlr_xwm *xwm, struct wlr_seat *seat);
 
+bool wlr_xwm_atoms_contains(struct wlr_xwm *xwm, xcb_atom_t *atoms,
+		size_t num_atoms, enum atom_name needle);
+
 #endif

rootston/desktop.c

@@ -426,13 +426,17 @@ void view_init(struct roots_view *view, struct roots_desktop *desktop) {
 	view_damage_whole(view);
 }
 
-void view_setup(struct roots_view *view) {
+void view_initial_focus(struct roots_view *view) {
 	struct roots_input *input = view->desktop->server->input;
 	// TODO what seat gets focus? the one with the last input event?
 	struct roots_seat *seat;
 	wl_list_for_each(seat, &input->seats, link) {
 		roots_seat_set_focus(seat, view);
 	}
+}
+
+void view_setup(struct roots_view *view) {
+	view_initial_focus(view);
 
 	view_center(view);
 	view_update_output(view, NULL);

rootston/seat.c

@@ -721,7 +721,7 @@ void roots_seat_set_focus(struct roots_seat *seat, struct roots_view *view) {
 
 #ifdef WLR_HAS_XWAYLAND
 	if (view && view->type == ROOTS_XWAYLAND_VIEW &&
-			view->xwayland_surface->override_redirect) {
+			wlr_xwayland_surface_is_unmanaged(view->xwayland_surface)) {
 		return;
 	}
 #endif

rootston/xwayland.c

@@ -350,5 +350,7 @@ void handle_xwayland_surface(struct wl_listener *listener, void *data) {
 		}
 
 		view_setup(view);
+	} else {
+		view_initial_focus(view);
 	}
 }

xwayland/xwayland.c

@@ -405,3 +405,24 @@ void wlr_xwayland_set_seat(struct wlr_xwayland *xwayland,
 	xwayland->seat_destroy.notify = wlr_xwayland_handle_seat_destroy;
 	wl_signal_add(&seat->events.destroy, &xwayland->seat_destroy);
 }
+
+
+bool wlr_xwayland_surface_is_unmanaged(const struct wlr_xwayland_surface *surface) {
+	static enum atom_name needles[] = {
+		NET_WM_WINDOW_TYPE_UTILITY,
+		NET_WM_WINDOW_TYPE_TOOLTIP,
+		NET_WM_WINDOW_TYPE_DND,
+		NET_WM_WINDOW_TYPE_DROPDOWN_MENU,
+		NET_WM_WINDOW_TYPE_POPUP_MENU,
+		NET_WM_WINDOW_TYPE_COMBO,
+	};
+
+	for (size_t i = 0; i < sizeof(needles) / sizeof(needles[0]); ++i) {
+		if (wlr_xwm_atoms_contains(surface->xwm, surface->window_type,
+				surface->window_type_len, needles[i])) {
+			return true;
+		}
+	}
+
+	return false;
+}

xwayland/xwm.c

@@ -54,6 +54,12 @@ const char *atom_map[ATOM_LAST] = {
 	"INCR",
 	"TEXT",
 	"TIMESTAMP",
+	"_NET_WM_WINDOW_TYPE_UTILITY",
+	"_NET_WM_WINDOW_TYPE_TOOLTIP",
+	"_NET_WM_WINDOW_TYPE_DND",
+	"_NET_WM_WINDOW_TYPE_DROPDOWN_MENU",
+	"_NET_WM_WINDOW_TYPE_POPUP_MENU",
+	"_NET_WM_WINDOW_TYPE_COMBO",
 };
 
 /* General helpers */
@@ -1446,3 +1452,17 @@ void wlr_xwayland_surface_set_fullscreen(struct wlr_xwayland_surface *surface,
 	xsurface_set_net_wm_state(surface);
 	xcb_flush(surface->xwm->xcb_conn);
 }
+
+bool wlr_xwm_atoms_contains(struct wlr_xwm *xwm, xcb_atom_t *atoms,
+		size_t num_atoms, enum atom_name needle) {
+	xcb_atom_t atom = xwm->atoms[needle];
+
+	for (size_t i = 0; i < num_atoms; ++i) {
+		if (atom == atoms[i]) {
+			return true;
+		}
+	}
+
+	return false;
+}
+