1 files changed, 88 insertions, 0 deletions
diff --git a/keyboards/idobao/id61/keymaps/idobao/specialk.c b/keyboards/idobao/id61/keymaps/idobao/specialk.c
new file mode 100644
index 0000000000..358d0cb764
--- /dev/null
+++ b/keyboards/idobao/id61/keymaps/idobao/specialk.c
@@ -0,0 +1,88 @@
+// Copyright 2022 Vino Rodrigues (@vinorodrigues)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "specialk.h"
+
+bool delkey_registered = false;
+uint32_t __keycode_raised = 0;
+
+bool get_keycode_raised(uint8_t n) {
+    return __keycode_raised & (1 << n);
+}
+
+void set_keycode_raised(uint8_t n, bool b) {
+    if (b) {
+        __keycode_raised |= 1 << n;
+    } else {
+        __keycode_raised &= ~(1 << n);
+    }
+}
+
+bool ID61_process_special_k(uint16_t keycode, keyrecord_t *record, bool arrow_mode, uint8_t k_norm, uint8_t k_spcl, uint8_t k_altr) {
+    bool is_raised = get_highest_layer(layer_state|default_layer_state) != 0;
+
+    if (record->event.pressed) {
+        set_keycode_raised(keycode - USER00, is_raised);  // save for key release event
+        if (is_raised) {
+            // *** Fn keyed ***
+            if (arrow_mode) {
+                // alternate key
+                register_code(k_altr);
+            } else {
+                // special key
+                register_code(k_spcl);
+            }
+        } else {
+            // *** normal, un-Fn'ed ***
+            if (arrow_mode) {
+                // special key
+                register_code(k_spcl);
+            } else {
+                // normal key
+                register_code(k_norm);
+            }
+        }
+    } else {
+        if (get_keycode_raised(keycode - USER00)) {
+            // *** Fn keyed ***
+            if (arrow_mode) {
+                // alternate key
+                unregister_code(k_altr);
+            } else {
+                // special key
+                unregister_code(k_spcl);
+            }
+        } else {
+            // *** normal, un-Fn'ed ***
+            if (arrow_mode) {
+                // special key
+                unregister_code(k_spcl);
+            } else {
+                // normal key
+                unregister_code(k_norm);
+            }
+        }
+    }
+    return false;
+}
+
+bool ID61_backspace_special(uint16_t keycode, keyrecord_t *record) {
+    uint8_t mod_state = get_mods();
+
+    if (record->event.pressed) {
+        if (mod_state & MOD_MASK_SHIFT) {
+            del_mods(MOD_MASK_SHIFT);
+            register_code(KC_DEL);
+            delkey_registered = true;
+            set_mods(mod_state);
+            return false;
+        }
+    } else {
+        if (delkey_registered) {
+            unregister_code(KC_DEL);
+            delkey_registered = false;
+            return false;
+        }
+    }
+    return true;  // normal backspace, pass on
+}