[feat] Request that clients don't draw their decorations.

1 files changed, 45 insertions, 0 deletions

diff --git a/rt/src/wl.c b/rt/src/wl.c
index 7c24168..af348f3 100644
--- a/rt/src/wl.c
+++ b/rt/src/wl.c
@@ -822,6 +822,41 @@ static void server_new_xdg_popup(struct wl_listener *listener, void *data)
   wl_signal_add(&xdg_popup->events.destroy, &popup->destroy);
 }
 
+static void xdg_decoration_request_mode(struct wl_listener *listener,
+                                        void *data)
+{
+  /* Clients can request a decoration mode; we always enforce server-side. */
+  struct montis_xdg_decoration *dec =
+      wl_container_of(listener, dec, request_mode);
+  wlr_xdg_toplevel_decoration_v1_set_mode(
+      dec->decoration, WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
+}
+
+static void xdg_decoration_destroy(struct wl_listener *listener, void *data)
+{
+  struct montis_xdg_decoration *dec =
+      wl_container_of(listener, dec, destroy);
+  wl_list_remove(&dec->request_mode.link);
+  wl_list_remove(&dec->destroy.link);
+  free(dec);
+}
+
+static void server_new_xdg_decoration(struct wl_listener *listener, void *data)
+{
+  /* Force server-side decorations to disable client-side frames. */
+  struct wlr_xdg_toplevel_decoration_v1 *decoration = data;
+  struct montis_xdg_decoration *dec = calloc(1, sizeof(*dec));
+  dec->decoration = decoration;
+
+  dec->request_mode.notify = xdg_decoration_request_mode;
+  wl_signal_add(&decoration->events.request_mode, &dec->request_mode);
+  dec->destroy.notify = xdg_decoration_destroy;
+  wl_signal_add(&decoration->events.destroy, &dec->destroy);
+
+  wlr_xdg_toplevel_decoration_v1_set_mode(
+      decoration, WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
+}
+
 static void xdg_toplevel_commit(struct wl_listener *listener, void *data)
 {
   /* Called when a new surface state is committed. */
@@ -992,6 +1027,16 @@ int main(int argc, char *argv[])
   server.new_xdg_popup.notify = server_new_xdg_popup;
   wl_signal_add(&server.xdg_shell->events.new_popup, &server.new_xdg_popup);
 
+  /* Request server-side decorations for xdg-toplevel surfaces. */
+  server.xdg_decoration_manager =
+      wlr_xdg_decoration_manager_v1_create(server.wl_display);
+  if (server.xdg_decoration_manager != NULL) {
+    server.new_xdg_decoration.notify = server_new_xdg_decoration;
+    wl_signal_add(
+        &server.xdg_decoration_manager->events.new_toplevel_decoration,
+        &server.new_xdg_decoration);
+  }
+
   /*
    * Creates a cursor, which is a wlroots utility for tracking the cursor
    * image shown on screen.