3 files changed, 174 insertions, 0 deletions
diff --git a/keyboards/mt/mt980/keymaps/walker/config.h b/keyboards/mt/mt980/keymaps/walker/config.h
new file mode 100644
index 0000000000..0bd3959938
--- /dev/null
+++ b/keyboards/mt/mt980/keymaps/walker/config.h
@@ -0,0 +1,5 @@
+#pragma once
+
+#define TAPPING_TERM 200
+#define ONESHOT_TAP_TOGGLE 5
+#define ONESHOT_TIMEOUT 5000
diff --git a/keyboards/mt/mt980/keymaps/walker/keymap.c b/keyboards/mt/mt980/keymaps/walker/keymap.c
new file mode 100644
index 0000000000..83a3fb8167
--- /dev/null
+++ b/keyboards/mt/mt980/keymaps/walker/keymap.c
@@ -0,0 +1,168 @@
+#include "mt980.h"
+
+bool numlock_on = true;
+
+typedef struct {
+  bool is_press_action;
+  int state;
+} tap;
+
+enum {
+  SINGLE_TAP = 1,
+  SINGLE_HOLD = 2,
+  DOUBLE_TAP = 3,
+  DOUBLE_HOLD = 4,
+  TRIPLE_TAP = 5,
+  TRIPLE_HOLD = 6
+};
+
+enum {
+  ALT_L1 = 0
+};
+
+int cur_dance (qk_tap_dance_state_t *state);
+void alt_finished (qk_tap_dance_state_t *state, void *user_data);
+void alt_reset (qk_tap_dance_state_t *state, void *user_data);
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [0] = LAYOUT(
+    KC_ESC,   KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,   KC_NO,              KC_INS,   KC_PSCR,  KC_PGUP,  KC_PGDN, 
+    KC_GRV,   KC_1,     KC_2,     KC_3,     KC_4,     KC_5,     KC_6,     KC_7,     KC_8,     KC_9,     KC_0,     KC_MINS,  KC_EQL,   KC_BSPC,  KC_BSPC,  KC_NLCK,  KC_PSLS,  KC_PAST,  KC_PMNS,
+    KC_TAB,   KC_Q,     KC_W,     KC_E,     KC_R,     KC_T,     KC_Y,     KC_U,     KC_I,     KC_O,     KC_P,     KC_LBRC,  KC_RBRC,  KC_BSLS,            KC_P7,    KC_P8,    KC_P9,    KC_PPLS,
+    KC_CAPS,  KC_A,     KC_S,     KC_D,     KC_F,     KC_G,     KC_H,     KC_J,     KC_K,     KC_L,     KC_SCLN,  KC_QUOT,  KC_ENT,                       KC_P4,    KC_P5,    KC_P6,    KC_PPLS,
+    KC_LSFT,  KC_LSFT,  KC_Z,     KC_X,     KC_C,     KC_V,     KC_B,     KC_N,     KC_M,     KC_COMM,  KC_DOT,   KC_SLSH,  KC_RSFT,  KC_UP,              KC_P1,    KC_P2,    KC_P3,    KC_PENT,
+    KC_LCTL,  KC_LGUI,  TD(ALT_L1),                   KC_SPC,                                 KC_RALT,  MO(1),    KC_RCTL,  KC_LEFT,  KC_DOWN,  KC_RGHT,            KC_P0,    KC_PDOT,  KC_PENT),
+
+  [1] = LAYOUT(
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,            KC_PAUSE, KC_SLCK,  KC_HOME,  KC_END,   
+    KC_TRNS,  KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,   RGB_TOG,  RESET,    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,            KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,                      KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   
+    KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  RGB_VAI,            KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,   
+    KC_TRNS,  KC_TRNS,  KC_TRNS,                      RESET,                                  KC_TRNS,  KC_TRNS,  KC_TRNS,  RGB_RMOD, RGB_VAD,  RGB_MOD,            KC_TRNS,  KC_TRNS,  KC_TRNS)  
+
+};
+
+int cur_dance (qk_tap_dance_state_t *state) {
+  if (state->count == 1) {
+    if (state->pressed) return SINGLE_HOLD;
+    else return SINGLE_TAP;
+  }
+  else if (state->count == 2) {
+    if (state->pressed) return DOUBLE_HOLD;
+    else return DOUBLE_TAP;
+  }
+  else if (state->count == 3) {
+    if (state->interrupted || !state->pressed)  return TRIPLE_TAP;
+    else return TRIPLE_HOLD;
+  }
+  else return 8;
+}
+
+static tap alttap_state = {
+  .is_press_action = true,
+  .state = 0
+};
+
+void alt_finished (qk_tap_dance_state_t *state, void *user_data) {
+  alttap_state.state = cur_dance(state);
+  switch (alttap_state.state) {
+    case SINGLE_TAP: set_oneshot_layer(1, ONESHOT_START); clear_oneshot_layer_state(ONESHOT_PRESSED); break;
+    case SINGLE_HOLD: register_code(KC_LALT); break;
+    case DOUBLE_TAP: set_oneshot_layer(1, ONESHOT_START); set_oneshot_layer(1, ONESHOT_PRESSED); break;
+    case DOUBLE_HOLD: register_code(KC_LALT); layer_on(1); break;
+  }
+}
+
+void alt_reset (qk_tap_dance_state_t *state, void *user_data) {
+  switch (alttap_state.state) {
+    case SINGLE_TAP: break;
+    case SINGLE_HOLD: unregister_code(KC_LALT); break;
+    case DOUBLE_TAP: break;
+    case DOUBLE_HOLD: layer_off(1); unregister_code(KC_LALT); break;
+  }
+  alttap_state.state = 0;
+}
+
+qk_tap_dance_action_t tap_dance_actions[] = {
+  [ALT_L1] = ACTION_TAP_DANCE_FN_ADVANCED(NULL,alt_finished, alt_reset)
+};
+
+void led_set_keymap(uint8_t usb_led) {
+  if (usb_led & (1<<USB_LED_NUM_LOCK)) {
+    numlock_on = true;
+  }
+  else {
+    numlock_on = false;
+  }
+}
+
+bool process_record_keymap(uint16_t keycode, keyrecord_t *record) {
+
+  switch (keycode) {
+    case KC_TRNS:
+    case KC_NO:
+      /* Always cancel one-shot layer when another key gets pressed */
+      if (record->event.pressed && is_oneshot_layer_active())
+      clear_oneshot_layer_state(ONESHOT_OTHER_KEY_PRESSED);
+      return true;
+    case RESET:
+      /* Don't allow reset from oneshot layer state */
+      if (record->event.pressed && is_oneshot_layer_active()) {
+        clear_oneshot_layer_state(ONESHOT_OTHER_KEY_PRESSED);
+        return false;
+      }
+      return true;
+    case KC_PPLS:
+      if (!numlock_on) {
+        if (is_oneshot_layer_active() || layer_state & 0x2) {
+          if (record->event.pressed)
+            register_code(KC_HOME);
+          else
+            unregister_code(KC_HOME);
+          clear_oneshot_layer_state(ONESHOT_START);
+        }
+        else {
+          if (record->event.pressed)
+            register_code(KC_PGUP);
+          else
+            unregister_code(KC_PGUP);
+        }
+        return false;
+      }
+      return true;
+    case KC_PENT:
+      if (!numlock_on) {
+        if (is_oneshot_layer_active() || layer_state & 0x2) {
+          if (record->event.pressed)
+            register_code(KC_END);
+          else
+            unregister_code(KC_END);
+          clear_oneshot_layer_state(ONESHOT_START);
+        }
+        else {
+          if (record->event.pressed)
+            register_code(KC_PGDN);
+          else
+            unregister_code(KC_PGDN);
+        }
+        return false;
+      }
+      return true;
+    case KC_NLCK:
+      /* Shift + NumLock will be treated as shift-Insert */
+      if ((keyboard_report->mods & MOD_BIT (KC_LSFT)) || (keyboard_report->mods & MOD_BIT (KC_RSFT))) {
+        if (record->event.pressed) {
+          register_code(KC_INS);
+          unregister_code(KC_INS);
+        }
+        return false;
+      }
+      else
+        return true;
+    default:
+      return true;
+  }
+  return true;
+}
diff --git a/keyboards/mt/mt980/keymaps/walker/rules.mk b/keyboards/mt/mt980/keymaps/walker/rules.mk
new file mode 100644
index 0000000000..e5ddcae8d9
--- /dev/null
+++ b/keyboards/mt/mt980/keymaps/walker/rules.mk
@@ -0,0 +1 @@
+TAP_DANCE_ENABLE = yes