[Keymap] Adding 'super alt' keymap for Wuque ikki68 Aurora (#14838)

* [Keymap] Adding personal keymap for ikki68 Aurora

* Add license headers

* Added support to toggle LED modes

* Added a toggleable layer for macOS (which swaps the GUI/ALT positions)

4 files changed, 275 insertions, 0 deletions

diff --git a/keyboards/wuque/ikki68_aurora/keymaps/ewersp/README.md b/keyboards/wuque/ikki68_aurora/keymaps/ewersp/README.md
new file mode 100644
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+++ b/keyboards/wuque/ikki68_aurora/keymaps/ewersp/README.md
@@ -0,0 +1,40 @@
+## Greetings, Traveler!
+
+This layout is for the [Wuque ikki68 Aurora](https://shop.wuquestudio.com/pages/ikki68-aurora) and is primarily meant for Windows.
+
+The keymap is similar to the default keymap for the Aurora, but it overloads the left alt key to behave like an additional 'Fn' key while keeping the standard functionality of the alt key intact.
+
+### For Example
+```
+LeftAlt + 1...N         -> F1...FN
+LeftAlt + L/R Arrows    -> Home/End
+LeftAlt + Home          -> End
+LeftAlt + Backspace     -> Delete
+LeftAlt + Esc           -> Backtick (`)
+LeftAlt + Shift + Esc   -> Tilde (~)
+LeftAlt + LeftShift + 4 -> Alt+F4
+```
+
+The novel part of this keymap is that it **preserves the default functionality** of the left alt key, so ```'alt + tab', 'ctrl + alt + del', 'alt + f4'```, etc. all work as expected without having to use timers.
+
+Everything also works with other modifier keys, so ```'alt + L/R' and 'alt + shift + L/R'``` work great for text manipulation to select lines.
+
+This **super alt** keymap will feel very familiar for anyone **coming from macOS** since the Windows alt key is in the same position as CMD on macOS keyboards.
+
+And finally, the original alt key functionality can be toggled at any time by pressing ```'Fn + period'``` so for example if a game requires use of the left alt, you can easily turn it off.
+
+### Toggle LED Modes
+You can also cycle though multiple LED modes (underglow, logo, all, none) by pressing ```'Fn + x'``` (the default ikki68 Aurora keymap only supports all or none). The last value set is persisted in EEPROM.
+
+### Compiling/Flashing
+1) After installing QMK MSYS, open the QMK MSYS terminal
+2) Type ```qmk compile -kb wuque/ikki68_aurora -km ewersp``` to test compilation
+3) Type ```qmk flash -kb wuque/ikki68_aurora -km ewersp``` to start flashing
+4) Press ```Fn+Page Up``` to put your keyboard into bootloader mode
+    - Note: After installing the keymap, to enter bootloader mode again press and hold ```Fn+B``` for half a second
+5) Wait for the ```Validating... Success``` message to appear and you're done!
+    - Note: If it gets stuck on ```Bootloader not found. Trying again every 0.5s...``` you may need to run QMK Toolbox to install/update drivers
+
+If you have any questions, feel free to reach out to me at: ewersp [at] gmail [dot] com.
+
+Enjoy! **<3**
diff --git a/keyboards/wuque/ikki68_aurora/keymaps/ewersp/config.h b/keyboards/wuque/ikki68_aurora/keymaps/ewersp/config.h
new file mode 100644
index 0000000000..1282334dce
--- /dev/null
+++ b/keyboards/wuque/ikki68_aurora/keymaps/ewersp/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2021 Paul Ewers
+ * 
+ * This program is free software: you can redistribute it and/or modify 
+ * it under the terms of the GNU General Public License as published by 
+ * the Free Software Foundation, either version 2 of the License, or 
+ * (at your option) any later version. 
+ * 
+ * This program is distributed in the hope that it will be useful, 
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * GNU General Public License for more details. 
+ * 
+ * You should have received a copy of the GNU General Public License 
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
+ */
+
+#pragma once
+
+#define FORCE_NKRO
diff --git a/keyboards/wuque/ikki68_aurora/keymaps/ewersp/keymap.c b/keyboards/wuque/ikki68_aurora/keymaps/ewersp/keymap.c
new file mode 100644
index 0000000000..5983625adc
--- /dev/null
+++ b/keyboards/wuque/ikki68_aurora/keymaps/ewersp/keymap.c
@@ -0,0 +1,215 @@
+/* Copyright 2021 Paul Ewers
+ * 
+ * This program is free software: you can redistribute it and/or modify 
+ * it under the terms of the GNU General Public License as published by 
+ * the Free Software Foundation, either version 2 of the License, or 
+ * (at your option) any later version. 
+ * 
+ * This program is distributed in the hope that it will be useful, 
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * GNU General Public License for more details. 
+ * 
+ * You should have received a copy of the GNU General Public License 
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
+ */
+
+#include QMK_KEYBOARD_H
+
+enum alt_keycodes {
+    ALT_DEL = SAFE_RANGE, // Map left alt + backspace to delete
+    LED_TOG               // Toggle LED modes
+};
+
+// Friendly layer names
+enum alt_layers {
+    DEF = 0,
+    ALT,
+    MAC,
+    FUNC,
+    SUPR
+};
+
+// EEPROM storage mode
+enum alt_led_mode {
+    LED_MODE_ALL = 0,
+    LED_MODE_LOGO,
+    LED_MODE_UNDERGLOW,
+    LED_MODE_OFF,
+    LED_MODE_TOTAL
+};
+
+// EEPROM storage type
+typedef union {
+    uint32_t raw;
+    struct {
+        uint8_t led_mode: 8;
+    };
+} user_config_t;
+
+user_config_t user_config;
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [DEF] = LAYOUT_all(
+        KC_ESC,  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_HOME, KC_PGUP,
+        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_DEL,  KC_PGDN,
+        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_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_RSFT,             KC_UP,
+        KC_LCTL, KC_LGUI, MO(SUPR),         KC_SPC,           KC_SPC,           KC_SPC,           KC_RALT, MO(FUNC),KC_RCTL,             KC_LEFT, KC_DOWN, KC_RGHT
+    ),
+    [ALT] = LAYOUT_all(
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,    _______, _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,             _______, _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,             _______,
+        _______, _______, KC_LALT,          _______,          _______,          _______,          _______, _______, _______,             _______, _______, _______
+    ),
+    [MAC] = LAYOUT_all(
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,    _______, _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,             _______, _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,             _______,
+        _______, KC_LALT, KC_LGUI,          _______,          _______,          _______,          KC_RGUI, _______, KC_RALT,             _______, _______, _______
+    ),
+    [FUNC] = LAYOUT_all(
+        KC_GRV,  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_END,  KC_VOLU,
+        _______, RGB_HUD, RGB_VAI, RGB_HUI, RGB_SAI, RGB_M_P, _______, _______, _______, KC_BRIU, KC_PAUS, KC_PSCR, _______, _______,             KC_MUTE, KC_VOLD,
+        _______, RGB_RMOD,RGB_VAD, RGB_MOD, RGB_SAD, RGB_M_B, _______, _______, _______, KC_BRID, _______, _______,          _______,
+        _______, _______, RGB_TOG, LED_TOG, _______, EEP_RST, RESET,   _______, _______, TG(MAC), TG(ALT), _______, _______, _______,             KC_PGUP,
+        _______, _______, KC_LALT,          _______,          _______,          _______,          _______, _______, _______,             KC_HOME, KC_PGDN, KC_END
+    ),
+    [SUPR] = LAYOUT_all(
+        KC_GRV,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  ALT_DEL, ALT_DEL,    KC_END,  _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,             _______, _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,             _______,
+        _______, _______, _______,          _______,          _______,          _______,          _______, _______, _______,             KC_HOME, _______, KC_END
+    )
+};
+
+// If the super alt layer is the active layer
+bool super_alt_layer_active = false;
+
+// If we need to unregister alt when leaving the super alt layer
+bool need_to_unregister_alt = false;
+
+// This runs code every time that the layers get changed
+layer_state_t layer_state_set_user(layer_state_t state) {
+    switch (get_highest_layer(state)) {
+        case DEF:
+            // When returning to the default layer, check if we need to unregister the left alt key
+            if (super_alt_layer_active && need_to_unregister_alt) {
+                unregister_code(KC_LALT);
+            }
+            super_alt_layer_active = false;
+            need_to_unregister_alt = false;
+            break;
+        case SUPR:
+            super_alt_layer_active = true;
+            break;
+    }
+    return state;
+}
+
+// There is a total of 20 LEDs on the board; the 4 logo LEDs have indices 16, 17, 18, 19
+void update_led_mode(void) {
+    rgblight_setrgb(0, 0, 0);
+    switch (user_config.led_mode) {
+        case LED_MODE_ALL:
+            rgblight_set_effect_range(0, RGBLED_NUM);
+            rgblight_enable_noeeprom();
+            break;
+        case LED_MODE_LOGO: 
+            rgblight_set_effect_range(16, 4);
+            rgblight_enable_noeeprom();
+            break;
+        case LED_MODE_UNDERGLOW:
+            rgblight_set_effect_range(0, 16);
+            rgblight_enable_noeeprom();
+            break;
+        case LED_MODE_OFF:
+            rgblight_disable_noeeprom();
+            break;
+    }
+}
+
+void keyboard_post_init_user(void) {
+    user_config.raw = eeconfig_read_user();
+    update_led_mode();
+}
+
+void eeconfig_init_user(void) {
+    user_config.raw      = 0;
+    user_config.led_mode = LED_MODE_ALL;
+    eeconfig_update_user(user_config.raw);
+    rgblight_enable();
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    static uint32_t key_timer;
+
+    switch (keycode) {
+        // These are the keys we want to 'fall though' and behave as usual when pressed with the alt modifier
+        case KC_A ... KC_Z:
+        case KC_TAB:
+        case KC_DEL:
+        case KC_UP:
+        case KC_DOWN:
+        case KC_ENT:
+        case KC_SPC:
+        case MO(FUNC):
+            if (super_alt_layer_active && record->event.pressed) {
+                // Only activate the alt modifier for the first key press
+                if ((get_mods() & MOD_BIT(KC_LALT)) == false) {
+                    register_code(KC_LALT);
+                    need_to_unregister_alt = true;
+                }
+            }
+            // We still want to process the keycode normally
+            return true;
+        case KC_F4:
+            // Map alt+shift+4 to alt+f4
+            if (super_alt_layer_active && (get_mods() & MOD_BIT(KC_LSHIFT))) {
+                if (record->event.pressed) {
+                    register_code(KC_LALT);
+                } else {
+                    unregister_code(KC_LALT);
+                }
+            }
+            return true;
+        case ALT_DEL:
+            if (record->event.pressed) {
+                register_code(KC_DEL);
+            } else {
+                unregister_code(KC_DEL);
+            }
+            return false;
+        case LED_TOG:
+            if (record->event.pressed) {
+                user_config.led_mode = (user_config.led_mode + 1) % LED_MODE_TOTAL;
+                update_led_mode();
+                eeconfig_update_user(user_config.raw);
+            }
+            return false;
+        case RESET:
+            if (record->event.pressed) {
+                key_timer = timer_read32();
+            } else {
+                if (timer_elapsed32(key_timer) >= 500) {
+                    reset_keyboard();
+                }
+            }
+            return false;
+        case EEP_RST:
+            if (record->event.pressed) {
+                key_timer = timer_read32();
+            } else {
+                if (timer_elapsed32(key_timer) >= 500) {
+                    eeconfig_init();
+                }
+            }
+            return false;
+        default:
+            return true; // Process all other keycodes normally
+    }
+}
diff --git a/keyboards/wuque/ikki68_aurora/keymaps/ewersp/rules.mk b/keyboards/wuque/ikki68_aurora/keymaps/ewersp/rules.mk
new file mode 100644
index 0000000000..4da205a168
--- /dev/null
+++ b/keyboards/wuque/ikki68_aurora/keymaps/ewersp/rules.mk
@@ -0,0 +1 @@
+LTO_ENABLE = yes