Bug 123736 Underline, linethrough, overline doesn't work for chart font.
Description: Underline, linethrough, overline doesn't work for chart font. Steps to teproduce: 1. Add a style, set its font. 2. Tick "underline", "linethrough" and "overline". 3. Preview. Font setting doesn't work.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/factory/Generator.java
type = getParentType( type );
		}
		return rStyle.style;
	}
	private StyledComponent getParentType( StyledComponent type )
	{
		switch ( type.getValue( ) )
		{
			case StyledComponent.CHART_ALL :
				return null;
			case StyledComponent.CHART_TITLE :
				return StyledComponent.CHART_BACKGROUND_LITERAL;
			case StyledComponent.CHART_BACKGROUND :
				return StyledComponent.CHART_ALL_LITERAL;
			case StyledComponent.PLOT_BACKGROUND :
				return StyledComponent.CHART_BACKGROUND_LITERAL;
			case StyledComponent.LEGEND_BACKGROUND :
				return StyledComponent.CHART_BACKGROUND_LITERAL;
			case StyledComponent.LEGEND_LABEL :
				return StyledComponent.LEGEND_BACKGROUND_LITERAL;
			case StyledComponent.AXIS_TITLE :
				return StyledComponent.PLOT_BACKGROUND_LITERAL;
			case StyledComponent.AXIS_LABEL :
				return StyledComponent.PLOT_BACKGROUND_LITERAL;
			case StyledComponent.AXIS_LINE :
				return StyledComponent.PLOT_BACKGROUND_LITERAL;
			case StyledComponent.SERIES_TITLE :
				return StyledComponent.PLOT_BACKGROUND_LITERAL;
			case StyledComponent.SERIES_LABEL :
				return StyledComponent.PLOT_BACKGROUND_LITERAL;