Bug 187213 Provid a writer to serialize design in document without any white space.
Add a new writer for serialize design in document without any withe space.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/IndentableXMLWriter.java
public void endElement( )
	{
		String tagName = ""; 
		
		if ( !elementStack.isEmpty( ) )
			tagName = (String) elementStack.peek( );
		
		
		if ( !elementStack.isEmpty( )
				&& !tagName.equalsIgnoreCase( lastTagName )
				&& ( pendingElementStack.isEmpty( ) || ( !pendingElementStack
						.isEmpty( ) && !tagName.equals( pendingElementStack
						.peek( ) ) ) ) )
			literal( getIndent( elementStack.size( ) - 1 ) );
		
		
		
		lastTagName = tagName;
		super.endElement( );
	}
	/**
	 * Returns the indent space for the given level. The level should be step
	 * one each time.
	 * 
	 * @param level
	 *            the indent level
	 * @return the indent space
	 */
	private String getIndent( int level )
	{