Bug 191005 PDF preview hangs up with attached xtab.[1102]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFLineAreaLM.java
}
	protected void createRoot( )
	{
		root = AreaFactory.createLineArea( context.getReport( ));
		lineCount++;
	}
	protected void initialize( )
	{
		createRoot( );
		maxAvaWidth =  parent.getCurrentMaxContentWidth( ) ;
		maxAvaHeight = parent.getCurrentMaxContentHeight( )  ;
		root.setWidth( parent.getCurrentMaxContentWidth( ) );
		setCurrentBP( 0 );
		if ( lineCount == 1 )
		{
			assert ( parent instanceof IBlockStackingLayoutManager );
			setCurrentIP( ( (PDFBlockStackingLM) parent ).getTextIndent( ) );
		}
		else
		{
			setCurrentIP( currentPosition );
		}
		setupMinHeight( );
	}
	/**
	 * submit current line to parent true if succeed
	 * 
	 * @return
	 */
	public boolean endLine( )