public static boolean isReallyTypedEvent(@NotNull KeyEvent e) {
    char c = e.getKeyChar();
    if (c == KeyEvent.CHAR_UNDEFINED) {
      // ignore CHAR_UNDEFINED, like Swing text components do
      return false;
    }
    if (c < 0x20 || c == 0x7F) {
      return false;
    }

    // allow input of special characters on Windows in Persian keyboard layout using Ctrl+Shift+1..4
    if (SystemInfoRt.isWindows && c >= 0x200C && c <= 0x200F) {
      return true;
    }
    else if (SystemInfoRt.isMac) {
      return !e.isMetaDown() && !e.isControlDown();
    }
    else {
      return !e.isAltDown() && !e.isControlDown();
    }
  }
public static boolean isReallyTypedEvent(@NotNull KeyEvent e)