xwm: only take clipboard if window is focused

xwayland/selection.c

@@ -466,7 +466,6 @@ static int xwm_handle_xfixes_selection_notify(struct wlr_xwm *xwm,
 	return 1;
 }
 
-
 int xwm_handle_selection_event(struct wlr_xwm *xwm,
 		xcb_generic_event_t *event) {
 	if (!xwm->seat) {
@@ -542,13 +541,25 @@ static void handle_seat_set_selection(struct wl_listener *listener,
 		return;
 	}
 
-	if (source->send == data_source_send)
+	if (source->send == data_source_send) {
 		return;
+	}
 
+	xwm_set_selection_owner(xwm);
+}
+
+void xwm_set_selection_owner(struct wlr_xwm *xwm) {
+	if (xwm->focus_surface && xwm->seat->selection_source) {
 		xcb_set_selection_owner(xwm->xcb_conn,
 			xwm->selection_window,
 			xwm->atoms[CLIPBOARD],
 			XCB_TIME_CURRENT_TIME);
+	} else {
+		xcb_set_selection_owner(xwm->xcb_conn,
+			XCB_ATOM_NONE,
+			xwm->atoms[CLIPBOARD],
+			xwm->selection_timestamp);
+	}
 }
 
 void xwm_set_seat(struct wlr_xwm *xwm, struct wlr_seat *seat) {

xwayland/xwm.c

@@ -174,6 +174,7 @@ void xwm_surface_activate(struct wlr_xwm *xwm,
 	xwm_send_focus_window(xwm, xsurface);
 
 	xwm->focus_surface = xsurface;
+	xwm_set_selection_owner(xwm);
 
 	xcb_flush(xwm->xcb_conn);
 }

xwayland/xwm.h

@@ -98,6 +98,8 @@ void xwm_set_cursor(struct wlr_xwm *xwm, const uint8_t *pixels, uint32_t stride,
 
 int xwm_handle_selection_event(struct wlr_xwm *xwm, xcb_generic_event_t *event);
 
+void xwm_set_selection_owner(struct wlr_xwm *xwm);
+
 void xwm_selection_init(struct wlr_xwm *xwm);
 
 void xwm_set_seat(struct wlr_xwm *xwm, struct wlr_seat *seat);