Bug 175664 [Mac] Unexpected internal exception occurs when invoke expression builder
Description: There are two problems: 1. "fx" button (Click this button to invoke Expression Builder) could not be displayed correctly, nothing displayed in the button. 2. Click on the button, an unexpected internal exception occurs. Version:2.2.0.v20070205 Steps to reproduce: 1.Insert a Data item to the layout. Click "fx" button to invoke the expression builder, although on Mac "fx" button could not display correctly. Error log: Argument cannot be null Plug-in Provider: Eclipse.org Plug-in Name: BIRT Designer UI Plug-in ID: org.eclipse.birt.report.designer.ui Error Code: Error.GUIException.invokedByUnexpectedException Error Message:Argument cannot be null
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* @return
	 * @deprecated see DEUtil.AddQuote( String string )
	 */
	public static String AddQuote( String string )
	{
		if ( string != null
				&& ( !( string.startsWith( "\"" ) && string.endsWith( "\"" ) ) ) )
		{
			return "\"" + string + "\"";
		}
		return string;
	}
	/**
	 * @param string
	 * @return
	 * @deprecated see DEUtil.RemoveQuote( String string )
	 */
	public static String RemoveQuote( String string )
	{
		if ( string != null
				&& string.length( ) >= 2
				&& string.startsWith( "\"" ) 
				&& string.endsWith( "\"" ) ) 
		{
			return string.substring( 1, string.length( ) - 1 );
		}
		return string;
	}
	/**
	 * Returns the maxinum length in pixels of given strings in a control.