/**
* visualize differences for some attribute
*
* @param string name of the target attribute
* @param string previous value
* @return string HTML showing differences
*/
function &diff($name, $value)
{
global $context;
// previous text
$value = Codes::beautify($value);
// target attribute does not exist
if (!isset($this->item[$name])) {
$output = '<ins>' . $value . '</ins>';
return $output;
}
// current text
$current = Codes::beautify($this->item[$name]);
// highlight differences
include_once $context['path_to_root'] . 'scripts/scripts.php';
$output =& Scripts::hdiff($value, $current);
return $output;
}
