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* @license GNU General Public License version 2 or later; see LICENSE.txt */ namespace Joomla\CMS\Filter; \defined('JPATH_PLATFORM') or die; use Joomla\CMS\Factory; use Joomla\CMS\Language\Language; use Joomla\Filter\OutputFilter as BaseOutputFilter; use Joomla\String\StringHelper; /** * OutputFilter * * @since 1.7.0 */ class OutputFilter extends BaseOutputFilter { /** * This method processes a string and replaces all instances of & with & in links only. * * @param string $input String to process * * @return string Processed string * * @since 1.7.0 */ public static function linkXHTMLSafe($input) { $regex = 'href="([^"]*(&(amp;){0})[^"]*)*?"'; return preg_replace_callback("#$regex#i", array('\\Joomla\\CMS\\Filter\\OutputFilter', 'ampReplaceCallback'), $input); } /** * This method processes a string and escapes it for use in JavaScript * * @param string $string String to process * * @return string Processed text */ public static function stringJSSafe($string) { $chars = preg_split('//u', $string, null, PREG_SPLIT_NO_EMPTY); $new_str = ''; foreach ($chars as $chr) { $code = str_pad(dechex(StringHelper::ord($chr)), 4, '0', STR_PAD_LEFT); if (strlen($code) < 5) { $new_str .= '\\u' . $code; } else { $new_str .= '\\u{' . $code . '}'; } } return $new_str; } /** * This method processes a string and replaces all accented UTF-8 characters by unaccented * ASCII-7 "equivalents", whitespaces are replaced by hyphens and the string is lowercase. * * @param string $string String to process * @param string $language Language to transliterate to * * @return string Processed string * * @since 1.7.0 */ public static function stringURLSafe($string, $language = '') { // Remove any '-' from the string since they will be used as concatenaters $str = str_replace('-', ' ', $string); // Transliterate on the language requested (fallback to current language if not specified) $lang = $language == '' || $language == '*' ? Factory::getLanguage() : Language::getInstance($language); $str = $lang->transliterate($str); // Trim white spaces at beginning and end of alias and make lowercase $str = trim(StringHelper::strtolower($str)); // Remove any apostrophe. We do it here to ensure it is not replaced by a '-' $str = str_replace("'", '', $str); // Remove any duplicate whitespace, and ensure all characters are alphanumeric $str = preg_replace('/(\s|[^A-Za-z0-9\-])+/', '-', $str); // Trim dashes at beginning and end of alias $str = trim($str, '-'); return $str; } /** * Callback method for replacing & with & in a string * * @param string $m String to process * * @return string Replaced string * * @since 3.5 */ public static function ampReplaceCallback($m) { $rx = '&(?!amp;)'; return preg_replace('#' . $rx . '#', '&', $m[0]); } }