Bug 307327 BIDI3.6:In-line component positioning problem in RTL Reports
engine/org.eclipse.birt.report.engine.emitter.html/src/org/eclipse/birt/report/engine/emitter/html/HTMLReportEmitter.java
private String validate( IHyperlinkAction action )
	{
		if ( action == null )
		{
			return null;
		}
		String systemId = runnable == null ? null : runnable.getReportName( );
		Action act = new Action( systemId, action );
		if ( actionHandler == null )
		{
			return null;
		}
		String link = actionHandler.getURL( act, reportContext );
		if ( link != null && !link.equals( "" ) )
		{
			return link;
		}
		return null;
	}
	/**
	 * handle style image
	 * 
	 * @param uri
	 *            uri in style image
	 * @return
	 */
	public String handleStyleImage( String uri )
	{
		return handleStyleImage( uri, false );
	}