/**
  * Transformation handler: 'txdam_media' / direction: "rte"
  * Processing linked images from database content going into the RTE.
  * Processing includes converting the src attribute to an absolute URL.
  *
  * @param	string		Content input
  * @return	string		Content output
  */
 function transform_rte($value, &$pObj)
 {
     // Split content by the TYPO3 pseudo tag "<media>":
     $blockSplit = $pObj->splitIntoBlock('media', $value, 1);
     foreach ($blockSplit as $k => $v) {
         $error = '';
         if ($k % 2) {
             // block:
             $tagCode = t3lib_div::unQuoteFilenames(trim(substr($pObj->getFirstTag($v), 0, -1)), true);
             $link_param = $tagCode[1];
             $href = '';
             $useDAMColumn = FALSE;
             // Checking if the id-parameter is int and get meta data
             if (t3lib_div::testInt($link_param)) {
                 $meta = tx_dam::meta_getDataByUid($link_param);
             }
             if (is_array($meta)) {
                 $href = tx_dam::file_url($meta);
                 if (!$tagCode[4]) {
                     require_once PATH_txdam . 'lib/class.tx_dam_guifunc.php';
                     $displayItems = '';
                     if (t3lib_div::inList($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['rtehtmlarea']['plugins']['TYPO3Link']['additionalAttributes'], 'usedamcolumn') && $pObj->thisConfig['buttons.']['link.']['media.']['properties.']['title.']['useDAMColumn']) {
                         $displayItems = $pObj->thisConfig['buttons.']['link.']['media.']['properties.']['title.']['useDAMColumn.']['displayItems'] ? $pObj->thisConfig['buttons.']['link.']['media.']['properties.']['title.']['useDAMColumn.']['displayItems'] : '';
                         $useDAMColumn = TRUE;
                     }
                     $tagCode[4] = tx_dam_guiFunc::meta_compileHoverText($meta, $displayItems, ', ');
                 }
             } else {
                 $href = $link_param;
                 $error = 'No media file found: ' . $link_param;
             }
             // Setting the A-tag:
             $bTag = '<a href="' . htmlspecialchars($href) . '" txdam="' . htmlspecialchars($link_param) . '"' . ($tagCode[2] && $tagCode[2] != '-' ? ' target="' . htmlspecialchars($tagCode[2]) . '"' : '') . ($tagCode[3] && $tagCode[3] != '-' ? ' class="' . htmlspecialchars($tagCode[3]) . '"' : '') . ($tagCode[4] ? ' title="' . htmlspecialchars($tagCode[4]) . '"' : '') . ($useDAMColumn ? ' usedamcolumn="true"' : '') . ($error ? ' rteerror="' . htmlspecialchars($error) . '" style="background-color: yellow; border:2px red solid; color: black;"' : '') . '>';
             $eTag = '</a>';
             $blockSplit[$k] = $bTag . $this->transform_rte($pObj->removeFirstAndLastTag($blockSplit[$k]), $pObj) . $eTag;
         }
     }
     $value = implode('', $blockSplit);
     return $value;
 }