Bug 102511 Enhance Highlighting to support Banding
Using the highlight feature to create a banded report results in a messy report. To recreate, create a simple tabular report. In the designer, select the detail row, go to the Highlights tab on the Property Editor view. Add a new highlight, set its condition to be "row[0] % 2" "Equals" "0". Set the formatting for the highlight to have a gray background color. When the report is previewed, alternating rows have a background color for each cell. The issue is that the backgrounds for the cells are not contiguous, there are spaces between each cell's background, and if a cell has a null value there is no background color. In this situation the highlight should apply to the row, instead it is being applied to each cell. If I manually set the background of a detail row to be gray I get the effect I want.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
*            user defined named expressions in design file
	 * @param namedExpressions
	 *            the data structure that hold named expressions
	 */
	private void setupNamedExpressions( DesignElementHandle handle,
			Map namedExpressions )
	{
		List userProperties = handle.getUserProperties( );
		if ( userProperties == null || namedExpressions == null )
			return;
		for ( int i = 0; i < userProperties.size( ); i++ )
		{
			UserPropertyDefn userDef = (UserPropertyDefn) userProperties
					.get( i );
			if ( userDef.getTypeCode( ) == IPropertyType.EXPRESSION_TYPE )
			{
				String name = userDef.getName( );
				String exprString = handle.getStringProperty( name );
				if ( exprString != null && !exprString.trim( ).equals( "" ) )
				{
					Expression expression = new Expression( exprString );
					namedExpressions.put( name, expression );
				}
			}
		}
	}
	/**
	 * setup the master page object from the base master page handle.
	 * 
	 * @param page