1 files changed, 60 insertions, 0 deletions

diff --git a/quantum/process_keycode/process_chording.c b/quantum/process_keycode/process_chording.c
new file mode 100644
index 000000000..d7814629f
--- /dev/null
+++ b/quantum/process_keycode/process_chording.c
@@ -0,0 +1,60 @@
+#include "process_chording.h"
+
+bool keys_chord(uint8_t keys[]) {
+  uint8_t keys_size = sizeof(keys)/sizeof(keys[0]);
+  bool pass = true;
+  uint8_t in = 0;
+  for (uint8_t i = 0; i < chord_key_count; i++) {
+    bool found = false;
+    for (uint8_t j = 0; j < keys_size; j++) {
+      if (chord_keys[i] == (keys[j] & 0xFF)) {
+        in++; // detects key in chord
+        found = true;
+        break;
+      }
+    }
+    if (found)
+      continue;
+    if (chord_keys[i] != 0)  {
+      pass = false; // makes sure rest are blank
+    }
+  }
+  return (pass && (in == keys_size));
+}
+
+bool process_chording(uint16_t keycode, keyrecord_t *record) {
+  if (keycode >= QK_CHORDING && keycode <= QK_CHORDING_MAX) {
+    if (record->event.pressed) {
+      if (!chording) {
+        chording = true;
+        for (uint8_t i = 0; i < CHORDING_MAX; i++)
+          chord_keys[i] = 0;
+        chord_key_count = 0;
+        chord_key_down = 0;
+      }
+      chord_keys[chord_key_count] = (keycode & 0xFF);
+      chord_key_count++;
+      chord_key_down++;
+      return false;
+    } else {
+      if (chording) {
+        chord_key_down--;
+        if (chord_key_down == 0) {
+          chording = false;
+          // Chord Dictionary
+          if (keys_chord((uint8_t[]){KC_ENTER, KC_SPACE})) {
+            register_code(KC_A);
+            unregister_code(KC_A);
+            return false;
+          }
+          for (uint8_t i = 0; i < chord_key_count; i++) {
+            register_code(chord_keys[i]);
+            unregister_code(chord_keys[i]);
+            return false;
+          }
+        }
+      }
+    }
+  }
+  return true;
+}
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