[Keymap] Neo2 for ErgoDox on MacOS US QWERTY / ABC Extended keymap (#5862)

This is a Neo2 inspired layout that is meant to be fully usable on
MacOS when used with the default US QWERTY/ABC Extended keymap.

Neo2 layers 1-4 have been almost fully implemented in hardware.
Layers 5 and 6 (greek and mathematical symbols) have been left
out for now as most of them aren't available on the default
keymaps.

Layer toggling for layer 3 on the right hand side utilizes a
tap-toggle approach that is a combination of MO & LT macros.
This is required to allow sending Y when tapped, @ when tapped
while the SHIFT modifier is active and support momentarily
toggling the layer while the key is held.

1 files changed, 47 insertions, 0 deletions

diff --git a/layouts/community/ergodox/osx_neo2/visualizer.c b/layouts/community/ergodox/osx_neo2/visualizer.c
new file mode 100644
index 0000000000..653201bb8a
--- /dev/null
+++ b/layouts/community/ergodox/osx_neo2/visualizer.c
@@ -0,0 +1,47 @@
+#include "layers.h"
+#include "simple_visualizer.h"
+#include "util.h"
+
+static void get_visualizer_layer_and_color(visualizer_state_t *state) {
+  uint8_t layer = biton32(state->status.layer);
+
+  // Go from highest to lowest layer to get the right text/color combination.
+  switch (layer) {
+    // #AEB2F4 / hsv(65.71%, 28.69%, 95.69%)
+    case FKEYS:
+      // #F4AEDC / hsv(89.05%, 28.69%, 95.69%)
+      state->layer_text       = "FUNCTION KEYS";
+      state->target_lcd_color = LCD_COLOR(228, 73, 245);
+      break;
+    case US_1:
+      // #F4B993 / hsv(6.53%, 39.75%, 95.69%)
+      state->layer_text       = "QWERTY";
+      state->target_lcd_color = LCD_COLOR(17, 102, 245);
+      break;
+    case NEO_6:
+      // #F4E393 / hsv(13.75%, 39.75%, 95.69%)
+      state->layer_text       = "NEO: 6";
+      state->target_lcd_color = LCD_COLOR(35, 102, 245);
+      break;
+    case NEO_5:
+      // #C6F493 / hsv(24.57%, 39.75%, 95.69%)
+      state->layer_text       = "NEO: 5";
+      state->target_lcd_color = LCD_COLOR(63, 102, 245);
+      break;
+    case NEO_4:
+      // #8EEBC9 / hsv(43.91%, 39.57%, 92.16%)
+      state->layer_text       = "NEO: 4";
+      state->target_lcd_color = LCD_COLOR(112, 101, 189);
+      break;
+    case NEO_3:
+      // #93D2F4 / hsv(55.84%, 39.75%, 95.69%)
+      state->layer_text       = "NEO: 3";
+      state->target_lcd_color = LCD_COLOR(143, 102, 245);
+      break;
+    default:
+      // #EEEEEE / hsv(0%, 0%, 93%)
+      state->layer_text       = "NEO: 1";
+      state->target_lcd_color = LCD_COLOR(0, 0, 255);
+      break;
+  }
+}