* TextComponent, document, text kit.
* @return this component's root view
*/
private RootViewContext createRootViewContext() {
TextFactory factory = TextFactory.getTextFactory();
RootViewContext c = factory.createRootView(null);
c.setComponent(this);
c.setDocument(document);
c.setViewFactoryGetter((TextKitImpl) getTextKit());
return c;
}