Method assignGeneratedModifiers

src/lib/platform/EiKeyState.cpp:192–211

Only way to figure out whether a key is a modifier key is to press it, check if a modifier changed state and then release it again. Luckily xkbcommon allows us to do this in a separate state.

// check if a modifier changed state and then release it again.
// Luckily xkbcommon allows us to do this in a separate state.
void EiKeyState::assignGeneratedModifiers(std::uint32_t keycode, deskflow::KeyMap::KeyItem &item)
{
  xkb_mod_mask_t xkbModMask = 0;
  auto state = xkb_state_new(m_xkbKeymap);

  if (enum xkb_state_component changed = xkb_state_update_key(state, keycode, XKB_KEY_DOWN); changed) {
    for (xkb_mod_index_t m = 0; m < xkb_keymap_num_mods(m_xkbKeymap); m++) {
      if (xkb_state_mod_index_is_active(state, m, XKB_STATE_MODS_LOCKED))
        item.m_lock = true;

      if (xkb_state_mod_index_is_active(state, m, XKB_STATE_MODS_EFFECTIVE)) {
        xkbModMask |= (1 << m);
      }
    }
  }
  xkb_state_update_key(state, keycode, XKB_KEY_UP);
  xkb_state_unref(state);

  item.m_generates = convertModMask(xkbModMask);
}

void EiKeyState::getKeyMap(deskflow::KeyMap &keyMap)
{