--- client2.c	2024-05-06 14:15:27.627513115 +0900
+++ plasma_shell.c	2024-05-06 14:21:03.819730307 +0900
@@ -9,6 +9,10 @@
 #include <unistd.h>
 #include <wayland-client.h>
 #include "xdg-shell-client-protocol.h"
+#include "plasma-shell-protocol.h"
+
+#define X 0
+#define Y 0

 /* Shared memory support code */
 static void
@@ -65,8 +69,10 @@
     struct wl_shm *wl_shm;
     struct wl_compositor *wl_compositor;
     struct xdg_wm_base *xdg_wm_base;
+    struct org_kde_plasma_shell *plasma_shell;
     /* Objects */
     struct wl_surface *wl_surface;
+    struct org_kde_plasma_surface *plasma_surface;
     struct xdg_surface *xdg_surface;
     struct xdg_toplevel *xdg_toplevel;
 };
@@ -164,6 +170,9 @@
                 wl_registry, name, &xdg_wm_base_interface, 1);
         xdg_wm_base_add_listener(state->xdg_wm_base,
                 &xdg_wm_base_listener, state);
+    } else if (strcmp(interface, org_kde_plasma_shell_interface.name) == 0) {
+        state->plasma_shell = wl_registry_bind(
+                wl_registry, name, &org_kde_plasma_shell_interface, 4);
     }
 }

@@ -191,6 +200,8 @@
     state.wl_surface = wl_compositor_create_surface(state.wl_compositor);
     state.xdg_surface = xdg_wm_base_get_xdg_surface(
             state.xdg_wm_base, state.wl_surface);
+    state.plasma_surface = org_kde_plasma_shell_get_surface(state.plasma_shell, state.wl_surface);
+    org_kde_plasma_surface_set_position(state.plasma_surface, X, Y);
     xdg_surface_add_listener(state.xdg_surface, &xdg_surface_listener, &state);
     state.xdg_toplevel = xdg_surface_get_toplevel(state.xdg_surface);
     xdg_toplevel_set_title(state.xdg_toplevel, "Example client");
@@ -202,3 +213,4 @@

     return 0;
 }
+