[Keymap] Feature/alfrdmalr/keymap update (#8174)

* WIP do not merge

* first pass at custom preonic layout

* add auto shift and reset via leader key

* Update readme

* update copyright notice

* formatting changes

* fix: use MO instead of process_record_user

* added backslash and moved grave position

* remove extraneous 'j' characer in NUMPAD template

* update template formatting

* remove process_record_user

* swap "!" with "@"

* fix readme formatting

* update readme layout image

* restore settings layer

* add windows minimize sequence

* fix: switch to correct seq function for three-key sequence

* fix: missing semicolon

* refactor: move keymap to userspace and generic 5x12 layout

* add numlock to numpad layer

* add readme

* update readme formatting

* remove unused wrappers from layout keymap

* update readme title to reflect new location

* remove alfrdmalr directory from preonic/keymaps

* add ortho 4x12 support

* add 'trilayer' settings and update keymap

* update SYMBOLS layer to SYMBOL

* remove minimize sequence

* clean up user config

* add brightness controls

* update settings ascii

* moved some symbols around to make vim/linux smoother

1 files changed, 55 insertions, 4 deletions

diff --git a/users/alfrdmalr/alfrdmalr.c b/users/alfrdmalr/alfrdmalr.c
index 39d2b62e00..18ce8bad7c 100644
--- a/users/alfrdmalr/alfrdmalr.c
+++ b/users/alfrdmalr/alfrdmalr.c
@@ -35,10 +35,61 @@ void matrix_scan_user(void) {
     SEQ_FIVE_KEYS(KC_R, KC_E, KC_S, KC_E, KC_T) {
       reset_keyboard();
     }
-    // minimize window (Windows)
-    SEQ_THREE_KEYS(KC_M, KC_I, KC_N) {
-      SEND_STRING(SS_LALT(" ")"n");
-    }
     leader_end(); 
   }
+}
+
+bool syml_pressed = false;
+bool symr_pressed = false;
+bool settings_active = false;
+bool symbols_active = false;
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch(keycode) {
+    case SYML:
+      if (record->event.pressed) {
+        syml_pressed = true;
+      } else {
+        syml_pressed = false;
+      }
+      break;
+    case SYMR:
+      if (record->event.pressed) {
+        symr_pressed = true;
+      } else {
+        symr_pressed = false;
+      }
+      break;
+  }
+
+  // trilayer-esque behavior. If both SYMBOL layer keys are held, then the 
+  // settings layer is open. If only one is held, SYMBOL is active.
+  if (syml_pressed && symr_pressed) {
+    layer_on(_SETTINGS);
+    settings_active = true;
+  } else if (syml_pressed || symr_pressed) {
+    if (settings_active) {
+      layer_off(_SETTINGS);
+      settings_active = false;
+    }
+    layer_on(_SYMBOL);
+    symbols_active = true;
+  } else {
+    if (symbols_active) {
+      layer_off(_SYMBOL);
+      symbols_active = false;
+    }
+  }
+
+  return true;
+}
+
+// allow access to the settings layer to turn music mode back off
+bool music_mask_user(uint16_t keycode) {
+  switch (keycode) {
+    case SYML:
+    case SYMR:
+      return false;
+    default:
+      return true;
+  }
 }
\ No newline at end of file