src/types.h Modified

@@ -10,6 +10,7 @@
 #include <wlr/types/wlr_compositor.h>
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_xdg_decoration_v1.h>
 #include <wlr/types/wlr_xdg_shell.h>
 #include <wlr/util/log.h>
 
@@ -49,6 +50,9 @@
     bool mark_waiting;
     struct mark_indicator mark_indicator;
 
+    struct wlr_xdg_decoration_manager_v1 *decoration_manager;
+    struct wl_listener decoration_listener;
+
     struct wlr_cursor *cursor;
     struct wlr_xcursor_manager *cursor_manager;
     struct wl_listener cursor_motion_listener;

src/main.c Modified

@@ -12,6 +12,7 @@
 
 #include "config.h"
 #include "cursor.h"
+#include "decorations.h"
 #include "desk.h"
 #include "main.h"
 #include "keyboard.h"
@@ -93,6 +94,7 @@
     set_up_shell(&server);
     set_up_cursor(&server);
     set_up_keyboard(&server);
+    set_up_decorations(&server);
 
     // start
     const char *socket = wl_display_add_socket_auto(server.display);

src/decorations.h Added

@@ -0,0 +1,14 @@
+#ifndef DESKWM_DECORATIONS_H
+#define DESKWM_DECORATIONS_H
+
+#include "types.h"
+
+struct decoration {
+    struct wlr_xdg_toplevel_decoration_v1 *wlr_xdg_decoration;
+    struct wl_listener destroy_listener;
+    struct wl_listener request_mode_listener;
+};
+
+void set_up_decorations(struct server *server);
+
+#endif

src/decorations.c Added

@@ -0,0 +1,50 @@
+#include "decorations.h"
+
+
+static void on_destroy(struct wl_listener *listener, void *data) {
+    struct decoration *deco = wl_container_of(listener, deco, destroy_listener);
+    wl_list_remove(&deco->destroy_listener.link);
+    wl_list_remove(&deco->request_mode_listener.link);
+    free(deco);
+}
+
+
+static void on_request_mode(struct wl_listener *listener, void *data) {
+    struct decoration *deco = wl_container_of(listener, deco, request_mode_listener);
+    wlr_xdg_toplevel_decoration_v1_set_mode(
+	deco->wlr_xdg_decoration, WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE
+    );
+}
+
+
+static void on_new_decoration(struct wl_listener *listener, void *data) {
+    struct wlr_xdg_toplevel_decoration_v1 *wlr_deco = data;
+
+    struct decoration *deco = calloc(1, sizeof(struct decoration));
+    if (deco == NULL) {
+	return;
+    }
+
+    deco->wlr_xdg_decoration = wlr_deco;
+
+    wl_signal_add(&wlr_deco->events.destroy, &deco->destroy_listener);
+    deco->destroy_listener.notify = on_destroy;
+
+    wl_signal_add(&wlr_deco->events.request_mode, &deco->request_mode_listener);
+    deco->request_mode_listener.notify = on_request_mode;
+
+    wlr_xdg_toplevel_decoration_v1_set_mode(
+	wlr_deco, WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE
+    );
+}
+
+
+void set_up_decorations(struct server *server) {
+    server->decoration_manager = wlr_xdg_decoration_manager_v1_create(server->display);
+
+    server->decoration_listener.notify = on_new_decoration;
+    wl_signal_add(
+        &server->decoration_manager->events.new_toplevel_decoration,
+        &server->decoration_listener
+    );
+}