public static function getDocumentDisplayParams($doc_id)
{
if (!$doc_id)
{
return null;
}
$storeId = md5(__METHOD__ . "::$doc_id");
if (!isset(self::$cache[$storeId]))
{
$params = JUDownloadHelper::getParams(null, $doc_id);
$global_display_params = $params->get('display_params');
$global_document_display_object = isset($global_display_params->doc) ? $global_display_params->doc : array();
$global_document_display_params = new JRegistry($global_document_display_object);
$docObj = JUDownloadHelper::getDocumentById($doc_id);
$document_params = $docObj->params;
if ($document_params)
{
$document_params = json_decode($document_params);
$document_display_params = $document_params->display_params;
if ($document_display_params)
{
$global_document_display_params = JUDownloadFrontHelperField::mergeFieldOptions($global_document_display_params->toObject(), $document_display_params);
unset($document_display_params->fields);
foreach ($document_display_params AS $option => $value)
{
if ($value == '-2')
{
unset($document_display_params->$option);
}
}
$global_document_display_params->loadObject($document_display_params);
}
}
self::$cache[$storeId] = $global_document_display_params;
}
return self::$cache[$storeId];
}
