[Keymap] Add issmirnov {user, ergodox, levinson} files. (#7239)

* Add issmirnov {user, ergodox, levinson} files.

There are enough interesting QMK tricks in these layouts that it seems
worth it to share with the broader community. Big thanks to Drashna for
inspiration, as well as all the wonderful creators of QMK documentation.

Some highlights:
- Common layout shared between levinson and ergodox_ez
- TAP_TOG macro for fast layer switching
- Autogenerated keymaps ascii art with git hooks

I will do my best to do periodic rolls here, but the source of truth
will always be https://github.com/issmirnov/qmk-keebs

* Incorporate review feedback.

- Remove CLEAR_EEPROM in favor of built in EEP_RST
- Remove custom handlers for audio on bootup and shutdown
- Remove plethora of unneeded includes
- Remove deprecated and dupliated config options

HUGE thanks to drashna for the review!

* Apply suggestions from code review

Huge thanks to drashna@ for a very thorough review and the very useful suggestions.

Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Remove unclear optimization

This was an artifact from some other keymap I saw.

1 files changed, 124 insertions, 0 deletions

diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/keymap.c b/keyboards/keebio/levinson/keymaps/issmirnov/keymap.c
new file mode 100644
index 0000000000..0023b8424f
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/keymap.c
@@ -0,0 +1,124 @@
+#include "tap_tog.h"
+
+#ifdef AUDIO_ENABLE
+  #include "audio.h"
+  #include "sounds.h"
+#endif
+
+
+#ifdef RGBLIGHT_ENABLE
+  #include "rgb.h"
+#endif
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_QWERTY] = LAYOUT_ortho_4x12_wrapper(
+KC_ESC  , _________________QWERTY_L1_________________, _________________QWERTY_R1_________________ , APPS      ,
+KC_TAB  , _________________QWERTY_L2_________________, _________________QWERTY_R2_________________ , MO(_NAVI) ,
+OSMSFT  , _________________QWERTY_L3_________________, _________________QWERTY_R3_________________ , KC_QUOTE  ,
+KC_LCTL , MODSFT , KC_LALT , KC_LGUI , KC_BSPACE , KC_SPC , KC_ENTER , KC_TAB , KC_UP  , KC_DOWN , KC_LEFT       , KC_RGHT
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_SYMB] = LAYOUT_ortho_4x12_wrapper(
+_______ , _________________SYMB_L1___________________, _________________SYMB_R1___________________ , KC_ESC   ,
+_______ , _________________SYMB_L2___________________, _________________SYMB_R2___________________ , KC_DQT   ,
+_______ , _________________SYMB_L3___________________, _________________SYMB_R3___________________ , KC_QUOTE ,
+_______ , ___________________BLANK___________________, _______ , _______ , KC_ESC   , KC_COLN   , KC_PERC       , LOCK
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_NUMP] = LAYOUT_ortho_4x12_wrapper(
+_______ , _________________NUMP_L1___________________ , _________________NUMP_R1___________________ , RESET   ,
+_______ , _________________NUMP_L2___________________ , _________________NUMP_R2___________________ , _______ ,
+_______ , _________________NUMP_L3___________________ , _________________NUMP_R3___________________ , _______ ,
+_______ , ___________________BLANK___________________ , _______ , _______ , _______ , _______ , TO(_OVERWATCH) , _______
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_OVERWATCH] = LAYOUT_ortho_4x12_wrapper(
+______________OVERWATCH_L1_________________ , TO(0)            , XXXXXXX          , XXXXXXX          , XXXXXXX        , XXXXXXX          , EEP_RST           ,
+______________OVERWATCH_L2_________________ , RGB_MODE_FORWARD , RGB_MODE_REVERSE , RGB_VAI          , RGB_VAD        , XXXXXXX          , RGB_TOG           ,
+______________OVERWATCH_L3_________________ , RGB_MODE_PLAIN   , RGB_MODE_BREATHE , RGB_MODE_RAINBOW , RGB_MODE_SWIRL , RGB_MODE_SNAKE   , RGB_MODE_XMAS     ,
+______________OVERWATCH_L4_________________ , KC_SPACE, RGB_HUI          , RGB_HUD          , RGB_SAI          , RGB_SAD        , RGB_MODE_RGBTEST , RGB_MODE_GRADIENT
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_NAVI] = LAYOUT_ortho_4x12_wrapper(
+XXXXXXX , _________________NAVI_L1___________________ , _________________NAVI_R1___________________ , XXXXXXX ,
+XXXXXXX , _________________NAVI_L2___________________ , _________________NAVI_R2___________________ , XXXXXXX ,
+XXXXXXX , _________________NAVI_L3___________________ , _________________NAVI_R3___________________ , XXXXXXX ,
+XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX , APPS    , KC_LGUI , MODSFT  , XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+};
+
+// called by QMK during key processing before the actual key event is handled. Useful for macros.
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case LOCK:
+      if (record->event.pressed) {
+        rgblight_mode(RGBLIGHT_MODE_RAINBOW_SWIRL);
+      }
+      return true; // Let QMK send the press/release events
+      break;
+
+    case TAP_TOG_LAYER:
+      process_tap_tog(_SYMB,record);
+      return false;
+      break;
+    default:
+      tap_tog_count = 0; // reset counter.
+      tap_tog_layer_other_key_pressed = true; // always set this to true, TAP_TOG_LAYER handlers will handle interpreting this
+      break;
+  }
+  return true;
+}
+
+
+// Runs constantly in the background, in a loop every 100ms or so.
+// Best used for LED status output triggered when user isn't actively typing.
+void matrix_scan_user(void) {
+  #ifdef RGBLIGHT_ENABLE
+    matrix_scan_rgb();
+  #endif // RGBLIGHT_ENABLE
+}
+
+// only runs when when the layer is changed, good for updating LED's and clearing sticky state
+// RGB modes: https://github.com/qmk/qmk_firmware/blob/master/quantum/rgblight.h
+uint32_t layer_state_set_user(uint32_t state) {
+  #ifdef RGBLIGHT_ENABLE
+    layer_state_set_rgb(state);
+  #endif
+  uint8_t layer = biton32(state);
+  combo_enable(); // by default, enable combos.
+  switch (layer) {
+    case 0:
+      break;
+    case 1:
+      clear_mods();
+      break;
+    case 2:
+      clear_mods();
+      break;
+    case _OVERWATCH:
+      clear_mods();
+      combo_disable(); // We don't want combos in overwatch
+      #ifdef AUDIO_ENABLE
+        // PLAY_SONG(song_overwatch);
+      #endif
+      break;
+    default:
+      break;
+  }
+  return state;
+};
+
+// Runs boot tasks for keyboard.
+// Plays a welcome song and clears RGB state.
+void matrix_init_user(void) {
+  #ifdef RGBLIGHT_ENABLE
+    keyboard_post_init_rgb();
+  #endif
+}