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-rw-r--r--users/callum/oneshot.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/users/callum/oneshot.c b/users/callum/oneshot.c
new file mode 100644
index 0000000000..33ec3895e2
--- /dev/null
+++ b/users/callum/oneshot.c
@@ -0,0 +1,57 @@
+#include "oneshot.h"
+
+void update_oneshot(
+ oneshot_state *state,
+ uint16_t mod,
+ uint16_t trigger,
+ uint16_t keycode,
+ keyrecord_t *record
+) {
+ if (keycode == trigger) {
+ if (record->event.pressed) {
+ // Trigger keydown
+ if (*state == os_up_unqueued) {
+ register_code(mod);
+ }
+ *state = os_down_unused;
+ } else {
+ // Trigger keyup
+ switch (*state) {
+ case os_down_unused:
+ // If we didn't use the mod while trigger was held, queue it.
+ *state = os_up_queued;
+ break;
+ case os_down_used:
+ // If we did use the mod while trigger was held, unregister it.
+ *state = os_up_unqueued;
+ unregister_code(mod);
+ break;
+ default:
+ break;
+ }
+ }
+ } else {
+ if (record->event.pressed) {
+ if (is_oneshot_cancel_key(keycode) && *state != os_up_unqueued) {
+ // Cancel oneshot on designated cancel keydown.
+ *state = os_up_unqueued;
+ unregister_code(mod);
+ }
+ } else {
+ if (!is_oneshot_ignored_key(keycode)) {
+ // On non-ignored keyup, consider the oneshot used.
+ switch (*state) {
+ case os_down_unused:
+ *state = os_down_used;
+ break;
+ case os_up_queued:
+ *state = os_up_unqueued;
+ unregister_code(mod);
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+}