2 files changed, 45 insertions, 1 deletions

diff --git a/quantum/keymap_common.h b/quantum/keymap_common.h
index 91d5c09c1..fafc93f7c 100644
--- a/quantum/keymap_common.h
+++ b/quantum/keymap_common.h
@@ -240,6 +240,8 @@ extern const uint16_t fn_actions[];
 #define BL_TOGG 0x5082
 #define BL_STEP 0x5083
 
+#define KC_LSPO 0x5084 // Left shift, open parens when tapped
+#define KC_RSPC 0x5085 // Right shift, close parens when tapped
 // GOTO layer - 16 layers max
 // when:
 // ON_PRESS    = 1
diff --git a/quantum/quantum.c b/quantum/quantum.c
index eb64a99a4..753dde5c6 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -21,6 +21,7 @@ void leader_end(void) {}
 uint8_t starting_note = 0x0C;
 int offset = 7;
 
+
 #ifdef AUDIO_ENABLE
   bool music_activated = false;
 
@@ -59,6 +60,8 @@ uint8_t chord_key_down = 0;
   static uint8_t input_mode;
 #endif
 
+static bool shift_interrupted[] = {0, 0, 0};
+
 bool keys_chord(uint8_t keys[]) {
   uint8_t keys_size = sizeof(keys)/sizeof(keys[0]);
   bool pass = true;
@@ -415,6 +418,45 @@ bool process_record_quantum(keyrecord_t *record) {
 
 #endif
 
+  switch(keycode) {
+    case KC_LSPO: {
+                    if (record->event.pressed) {
+                      shift_interrupted[0] = false;
+                      register_mods(MOD_BIT(KC_LSFT));
+                    }
+                    else {
+                      if (!shift_interrupted[0]) {
+                        register_code(KC_9);
+                        unregister_code(KC_9);
+                      }
+                      unregister_mods(MOD_BIT(KC_LSFT));
+                    }
+                    return false;
+                    break;
+                  }
+
+    case KC_RSPC: {
+                    if (record->event.pressed) {
+                      shift_interrupted[1] = false;
+                      register_mods(MOD_BIT(KC_RSFT));
+                    }
+                    else {
+                      if (!shift_interrupted[1]) {
+                        register_code(KC_0);
+                        unregister_code(KC_0);
+                      }
+                      unregister_mods(MOD_BIT(KC_RSFT));
+                    }
+                    return false;
+                    break;
+                  }
+    default: {
+               shift_interrupted[0] = true;
+               shift_interrupted[1] = true;
+               break;
+             }
+  }
+
   return process_action_kb(record);
 }
 
@@ -481,4 +523,4 @@ void audio_on_user() {}
 __attribute__ ((weak))
 void music_scale_user() {}
 
-//------------------------------------------------------------------------------
\ No newline at end of file
+//------------------------------------------------------------------------------