xdg_shell: bump to v5

v5 adds the wm_capabilities event. cage only supports fullscreen.

cage.c

@@ -416,7 +416,7 @@ main(int argc, char *argv[])
 	wl_signal_add(&server.idle_inhibit_v1->events.new_inhibitor, &server.new_idle_inhibitor_v1);
 	wl_list_init(&server.inhibitors);
 
-	struct wlr_xdg_shell *xdg_shell = wlr_xdg_shell_create(server.wl_display, 4);
+	struct wlr_xdg_shell *xdg_shell = wlr_xdg_shell_create(server.wl_display, 5);
 	if (!xdg_shell) {
 		wlr_log(WLR_ERROR, "Unable to create the XDG shell interface");
 		ret = 1;

xdg_shell.c

@@ -227,6 +227,8 @@ handle_xdg_toplevel_commit(struct wl_listener *listener, void *data)
 		return;
 	}
 
+	wlr_xdg_toplevel_set_wm_capabilities(xdg_shell_view->xdg_toplevel, XDG_TOPLEVEL_WM_CAPABILITIES_FULLSCREEN);
+
 	/* When an xdg_surface performs an initial commit, the compositor must
 	 * reply with a configure so the client can map the surface. */
 	view_position(&xdg_shell_view->view);
@@ -293,6 +295,7 @@ popup_handle_destroy(struct wl_listener *listener, void *data)
 	struct cg_xdg_popup *popup = wl_container_of(listener, popup, destroy);
 	wl_list_remove(&popup->destroy.link);
 	wl_list_remove(&popup->commit.link);
+	wl_list_remove(&popup->reposition.link);
 	free(popup);
 }
 
@@ -306,6 +309,14 @@ popup_handle_commit(struct wl_listener *listener, void *data)
 	}
 }
 
+static void
+popup_handle_reposition(struct wl_listener *listener, void *data)
+{
+	struct cg_xdg_popup *popup = wl_container_of(listener, popup, reposition);
+
+	popup_unconstrain(popup->xdg_popup);
+}
+
 void
 handle_new_xdg_popup(struct wl_listener *listener, void *data)
 {
@@ -350,6 +361,9 @@ handle_new_xdg_popup(struct wl_listener *listener, void *data)
 	popup->commit.notify = popup_handle_commit;
 	wl_signal_add(&wlr_popup->base->surface->events.commit, &popup->commit);
 
+	popup->reposition.notify = popup_handle_reposition;
+	wl_signal_add(&wlr_popup->events.reposition, &popup->reposition);
+
 	struct wlr_scene_tree *popup_scene_tree = wlr_scene_xdg_surface_create(parent_scene_tree, wlr_popup->base);
 	if (popup_scene_tree == NULL) {
 		wlr_log(WLR_ERROR, "Failed to allocate scene-graph node for XDG popup");

xdg_shell.h

@@ -31,6 +31,7 @@ struct cg_xdg_popup {
 
 	struct wl_listener destroy;
 	struct wl_listener commit;
+	struct wl_listener reposition;
 };
 
 void handle_new_xdg_toplevel(struct wl_listener *listener, void *data);