Bug 143659 [Accessibility] Press Tab key will cause eclipse crash when focus isn't on any report item in Editor view
Press Tab key will cause eclipse crash when focus isn't on any report item in Editor view Steps to reproduce: 1. New a report 2. Click the blank area in Layout of Editor view 3. Press Tab key Expected result: Something in layout will get focus Actual result: Eclipse crashed
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/parts/ReportFocusTraverseManager.java
{
	/**
	 * Default constructor.
	 */
	public ReportFocusTraverseManager() { }
	private IFigure findDeepestRightmostChildOf(IFigure fig) {
		while (fig.getChildren().size() != 0) {
			fig = (IFigure)fig.getChildren().get(fig.getChildren().size() - 1);
		}	
		return fig;
	}
	/**
	 * Returns the IFigure that will receive focus upon a 'tab' traverse event.
	 * 
	 * @param root the {@link LightweightSystem LightweightSystem's} root figure
	 * @param focusOwner the IFigure who currently owns focus
	 * @return the next focusable figure
	 */
	public IFigure getNextFocusableFigure(IFigure root, IFigure focusOwner) {
		boolean found = false;
		IFigure nextFocusOwner = focusOwner;
		
		/* If no Figure currently has focus,