Default laptop key set to capslock. Keys that can be set to fenrir key or script key selectable via checkbox.

internal/terminal/native.c

@@ -218,7 +218,7 @@ static void install_grabs(TerminalX *x) {
                     x->numlock |= 1u << mask;
         XFreeModifiermap(modifiers);
     }
-    KeySym keys[] = {XK_Insert, XK_Super_L, XK_Super_R, XK_Meta_L, XK_Meta_R,
+    KeySym keys[] = {XK_Insert,
         XK_KP_Insert, XK_KP_End, XK_KP_Down, XK_KP_Page_Down, XK_KP_Left,
         XK_KP_Begin, XK_KP_Right, XK_KP_Home, XK_KP_Up, XK_KP_Page_Up,
         XK_KP_Delete, XK_KP_Enter, XK_KP_Add, XK_KP_Subtract, XK_KP_Divide,
@@ -243,6 +243,16 @@ static void install_grabs(TerminalX *x) {
         }
     }
 }
+int terminal_x_caps_lock(TerminalX *x, int enabled) {
+    if (!XkbLockModifiers(x->display, XkbUseCoreKbd, LockMask, enabled ? LockMask : 0)) return -EIO;
+    XSync(x->display, False);
+    return 0;
+}
+int terminal_x_toggle_caps(TerminalX *x) {
+    XkbStateRec state;
+    if (XkbGetState(x->display, XkbUseCoreKbd, &state) != Success) return -EIO;
+    return terminal_x_caps_lock(x, !(state.locked_mods & LockMask));
+}
 int terminal_x_script_keys(TerminalX *x, const int *keys, int count) {
     if (count < 0 || count > KEY_MAX+1) return -EINVAL;
     XErrorHandler previous = begin_trap(x->display);
@@ -443,6 +453,7 @@ int terminal_key_code(unsigned long symbol, int keycode) {
     case XK_Page_Up: return KEY_PAGEUP;
     case XK_Page_Down: return KEY_PAGEDOWN;
     case XK_Insert: return KEY_INSERT;
+    case XK_Caps_Lock: return KEY_CAPSLOCK;
     case XK_Multi_key: return KEY_COMPOSE;
     case XK_Menu: return KEY_MENU;
     case XK_Super_L: case XK_Meta_L: return KEY_LEFTMETA;