1 files changed, 20 insertions, 0 deletions
diff --git a/src/x11_util.h b/src/x11_util.h
new file mode 100644
index 0000000..7ca2e7c
--- /dev/null
+++ b/src/x11_util.h
@@ -0,0 +1,20 @@
+// Copyright 2020-2024 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#ifndef SUIL_X11_UTIL
+#define SUIL_X11_UTIL
+
+#include <X11/X.h>
+#include <X11/Xlib.h>
+
+#include <stdbool.h>
+
+/// Return whether `child` can be found in the subtree under `parent`
+bool
+suil_x11_is_valid_child(Display* display, Window parent, Window child);
+
+/// Return the non-root parent window of `child` if it has one, or zero
+Window
+suil_x11_get_parent(Display* display, Window child);
+
+#endif // SUIL_X11_UTIL