Bug 256844 [CSS] TK-UI CSS engine for Nebula widget
examples/org.eclipse.e4.ui.examples.css/src/org/eclipse/e4/ui/examples/css/editor/AbstractCSSSWTEditor.java
* 
	 * @see org.eclipse.e4.ui.core.css.examples.csseditors.AbstractCSSEditor#getHTMLElementProvider()
	 */
	protected IElementProvider getHTMLElementProvider() {
		return SWTHTMLElementProvider.INSTANCE;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.ui.core.css.examples.csseditors.AbstractCSSEditor#getNativeWidgetElementProvider()
	 */
	protected IElementProvider getNativeWidgetElementProvider() {
		return SWTElementProvider.INSTANCE;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.ui.core.css.examples.csseditors.AbstractCSSEditor#isHTMLSelector()
	 */
	protected boolean isHTMLSelector() {
		return htmlCheckbox.getSelection();
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.ui.core.css.examples.csseditors.AbstractCSSEditor#getStyleSheetContent()
	 */
	protected String getStyleSheetContent() {
		return textArea.getText();
	}