[Keymap] clean up userspace, add XD75 / Keyboardio Atreus (#13121)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

users/replicaJunction/features/num_word.c

@@ -0,0 +1,129 @@
+/* Copyright 2021 Joshua T.
+ *
+ * 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 "num_word.h"
+
+static uint16_t num_word_timer = 0;
+static bool is_num_word_on = false;
+
+bool is_num_word_enabled(void) {
+    return is_num_word_on;
+}
+
+void enable_num_word(void) {
+    if (is_num_word_on) return;
+    is_num_word_on = true;
+    layer_on(L_NUMBERS);
+}
+
+void disable_num_word(void) {
+    if (!is_num_word_on) return;
+    is_num_word_on = false;
+    layer_off(L_NUMBERS);
+}
+
+void toggle_num_word(void) {
+    if (is_num_word_on) {
+        disable_num_word();
+    }
+    else {
+        enable_num_word();
+    }
+}
+
+bool should_terminate_num_word(uint16_t keycode, const keyrecord_t *record) {
+    switch (keycode) {
+        // Keycodes which should not disable num word mode.
+        // We could probably be more brief with these definitions by using
+        // a couple more ranges, but I believe "explicit is better than
+        // implicit"
+        case KC_1 ... KC_0:
+        case KC_EQL:
+        case KC_SCLN:
+        case KC_MINS:
+        case KC_DOT:
+
+        // Numpad keycodes
+        case KC_P1 ... KC_P0:
+        case KC_PSLS ... KC_PPLS:
+        case KC_PDOT:
+
+        // Misc
+        case KC_UNDS:
+        case KC_BSPC:
+            return false;
+
+        default:
+            if (record->event.pressed) {
+                return true;
+            }
+            return false;
+    }
+
+    // Should be unreachable
+    return false;
+}
+
+
+bool process_record_num_word(uint16_t keycode, const keyrecord_t *record) {
+    // Handle the custom keycodes that go with this feature
+    if (keycode == NUMWORD) {
+        if (record->event.pressed) {
+            enable_num_word();
+            num_word_timer = timer_read();
+            return false;
+        }
+        else {
+            if (timer_elapsed(num_word_timer) > TAPPING_TERM) {
+                // If the user held the key longer than TAPPING_TERM,
+                // consider it a hold, and disable the behavior on
+                // key release.
+                disable_num_word();
+                return false;
+            }
+        }
+    }
+
+    // Other than the custom keycodes, nothing else in this feature will
+    // activate if the behavior is not on, so allow QMK to handle the
+    // event as usual
+    if (!is_num_word_on) return true;
+
+    // Nothing else acts on key release, either
+    if (!record->event.pressed) {
+        return true;
+    }
+
+    // Get the base keycode of a mod or layer tap key
+    switch (keycode) {
+        case QK_MOD_TAP ... QK_MOD_TAP_MAX:
+        case QK_LAYER_TAP ... QK_LAYER_TAP_MAX:
+        case QK_TAP_DANCE ... QK_TAP_DANCE_MAX:
+            // Earlier return if this has not been considered tapped yet
+            if (record->tap.count == 0)
+                return true;
+            keycode = keycode & 0xFF;
+            break;
+        default:
+            break;
+    }
+
+    if (should_terminate_num_word(keycode, record)) {
+        disable_num_word();
+    }
+
+    return true;
+}