please include function rsyntaxTextArea_fixNumPad.

sclass NumPadFixingInputMap extends InputMap {
  public void put(KeyStroke keyStroke, Object actionMapKey) {
    super.put(keyStroke, actionMapKey);
    Int code = rsyntaxTextArea_fixNumPad_map.get(keyStroke.getKeyCode());
    if (code != null)
      put(KeyStroke.getKeyStroke(code, keyStroke.getModifiers()), actionMapKey);
  }
  
  void replaceOn(JComponent c) {
    InputMap im = c.getInputMap();
    setParent(im.getParent());
    for (KeyStroke key : im.keys())
      put(key, im.get(key));
    c.setInputMap(JComponent.WHEN_FOCUSED, this);
  }
}