1 files changed, 142 insertions, 0 deletions
diff --git a/keyboards/hhkb/keymaps/shela/action_pseudo_lut.c b/keyboards/hhkb/keymaps/shela/action_pseudo_lut.c
new file mode 100644
index 0000000000..b205968c7b
--- /dev/null
+++ b/keyboards/hhkb/keymaps/shela/action_pseudo_lut.c
@@ -0,0 +1,142 @@
+#include "quantum.h"
+#include "action_pseudo_lut.h"
+
+static uint8_t send_key_shift_bit[SHIFT_BIT_SIZE];
+
+/*
+ * Pseudo layout action.
+ * This action converts a keycode in order to output the character according to the keymap you specified
+ * still your keyboard layout recognized wrongly on your OS.
+ * Memo: Using other layer keymap to get keycode
+ */
+void action_pseudo_lut(keyrecord_t *record, uint8_t base_keymap_id, const uint16_t (*keymap)[2]) {
+    static uint8_t prev_shift;
+    uint16_t keycode;
+    uint16_t pseudo_keycode;
+
+    /* get keycode from keymap you specified */
+    keycode = keymap_key_to_keycode(base_keymap_id, record->event.key);
+
+    prev_shift = keyboard_report->mods & (MOD_BIT(KC_LSFT) | MOD_BIT(KC_RSFT));
+
+    if (record->event.pressed) {
+        /* when magic commands entered, keycode does not converted */
+        if (IS_COMMAND()) {
+            if (prev_shift) {
+                add_shift_bit(keycode);
+            }
+            register_code(keycode);
+            return;
+        }
+
+        if (prev_shift) {
+            pseudo_keycode = convert_keycode(keymap, keycode, true);
+            dprintf("pressed: %02X, converted: %04X\n", keycode, pseudo_keycode);
+            add_shift_bit(keycode);
+
+            if (IS_LSFT(pseudo_keycode)) {
+                register_code(QK_LSFT ^ pseudo_keycode);
+            } else {
+                /* delete shift mod temporarily */
+                del_mods(prev_shift);
+                send_keyboard_report();
+                register_code(pseudo_keycode);
+                add_mods(prev_shift);
+                send_keyboard_report();
+            }
+        } else {
+            pseudo_keycode = convert_keycode(keymap, keycode, false);
+            dprintf("pressed: %02X, converted: %04X\n", keycode, pseudo_keycode);
+
+            if (IS_LSFT(pseudo_keycode)) {
+                add_weak_mods(MOD_BIT(KC_LSFT));
+                send_keyboard_report();
+                register_code(QK_LSFT ^ pseudo_keycode);
+                /* on Windows, prevent key repeat to avoid unintended output */
+                unregister_code(QK_LSFT ^ pseudo_keycode);
+                del_weak_mods(MOD_BIT(KC_LSFT));
+                send_keyboard_report();
+            } else {
+                register_code(pseudo_keycode);
+            }
+        }
+    } else {
+        if (get_shift_bit(keycode)) {
+            del_shift_bit(keycode);
+            pseudo_keycode = convert_keycode(keymap, keycode, true);
+        } else {
+            pseudo_keycode = convert_keycode(keymap, keycode, false);
+        }
+        dprintf("released: %02X, converted: %04X\n", keycode, pseudo_keycode);
+
+        if (IS_LSFT(pseudo_keycode)) {
+            unregister_code(QK_LSFT ^ pseudo_keycode);
+        } else {
+            unregister_code(pseudo_keycode);
+        }
+    }
+}
+
+uint16_t convert_keycode(const uint16_t (*keymap)[2], uint16_t keycode, bool shift_modded)
+{
+    uint16_t pseudo_keycode;
+
+    switch (keycode) {
+        case KC_A ... KC_CAPSLOCK:
+#if defined(__AVR__)
+            if (shift_modded) {
+                pseudo_keycode = pgm_read_word(&keymap[keycode][1]);
+            } else {
+                pseudo_keycode = pgm_read_word(&keymap[keycode][0]);
+            }
+#else
+            if (shift_modded) {
+                pseudo_keycode = keymap[keycode][1];
+            } else {
+                pseudo_keycode = keymap[keycode][0];
+            }
+#endif
+            /* if undefined, use got keycode as it is */
+            if (pseudo_keycode == 0x00) {
+                if (shift_modded) {
+                    pseudo_keycode = S(keycode);
+                } else {
+                    pseudo_keycode = keycode;
+                }
+            }
+            break;
+        default:
+            if (shift_modded) {
+                pseudo_keycode = S(keycode);
+            } else {
+                pseudo_keycode = keycode;
+            }
+            break;
+    }
+    return pseudo_keycode;
+}
+
+uint8_t get_shift_bit(uint16_t keycode) {
+    if ((keycode >> 3) < SHIFT_BIT_SIZE) {
+        return send_key_shift_bit[keycode >> 3] & (1 << (keycode & 7));
+    } else {
+        dprintf("get_shift_bit: Can't get shift bit. keycode: %02X\n", keycode);
+        return 0;
+    }
+}
+
+void add_shift_bit(uint16_t keycode) {
+    if ((keycode >> 3) < SHIFT_BIT_SIZE) {
+        send_key_shift_bit[keycode >> 3] |= (1 << (keycode & 7));
+    } else {
+        dprintf("add_shift_bit: Can't add shift bit. keycode: %02X\n", keycode);
+    }
+}
+
+void del_shift_bit(uint16_t keycode) {
+    if ((keycode >> 3) < SHIFT_BIT_SIZE) {
+        send_key_shift_bit[keycode >> 3] &= ~(1 << (keycode & 7));
+    } else {
+        dprintf("del_shift_bit: Can't delete shift bit. keycode: %02X\n", keycode);
+    }
+}