Bug 156969 [regression]Group header repeat doesn't work in Web Viewer.
Description: Group header repeat doesn't work in Web Viewer. Steps to reproduce: 1. New a data source and dataset, drag the dataset to Layout. 2. Add a group. 3. Set page break in the first data item in table detail row. 4. Preview in web viewer&#12290; Expected result: Group header is repeated in each page. Actual result: No group header repeat effect.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/EngineIRReader.java
case FIELD_IMAGE_SOURCE :
				int imageSource = IOUtil.readInt( in );
				switch ( imageSource )
				{
					case ImageItemDesign.IMAGE_NAME :
						String imageName = IOUtil.readString( in );
						image.setImageName( imageName );
						break;
					case ImageItemDesign.IMAGE_FILE :
						String imageFile = IOUtil.readString( in );
						image.setImageFile( imageFile );
						break;
					case ImageItemDesign.IMAGE_URI :
						String imageUri = IOUtil.readString( in );
						image.setImageUri( imageUri );
						break;
					case ImageItemDesign.IMAGE_EXPRESSION :
						String imageExpr = IOUtil.readString( in );
						String imageFormat = IOUtil.readString( in );
						image.setImageExpression( imageExpr, imageFormat );
						break;
					default :
						throw new IOException( "invalid image source: "
								+ imageSource );
				}
				break;
			case FIELD_ALT_TEXT :
				String altTextKey = IOUtil.readString( in );
				String altText = IOUtil.readString( in );
				image.setAltText( altTextKey, altText );