process_unicode: Make the startup overridable

Extract out the part of `qk_ucis_start` that inputs the placeholder
symbol, and make it weak, so it can be overridden.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/quantum/process_keycode/process_unicode.c b/quantum/process_keycode/process_unicode.c
index d71434411..c474483e7 100644
--- a/quantum/process_keycode/process_unicode.c
+++ b/quantum/process_keycode/process_unicode.c
@@ -75,6 +75,11 @@ void qk_ucis_start(void) {
   qk_ucis_state.count = 0;
   qk_ucis_state.in_progress = true;
 
+  qk_ucis_start_user();
+}
+
+__attribute__((weak))
+void qk_ucis_start_user(void) {
   unicode_input_start();
   register_hex(0x2328);
   unicode_input_finish();