diff options
Diffstat (limited to 'vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php')
-rw-r--r-- | vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php new file mode 100644 index 000000000..63fa04c15 --- /dev/null +++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/LinkTypes.php @@ -0,0 +1,72 @@ +<?php + +/** + * Validates a rel/rev link attribute against a directive of allowed values + * @note We cannot use Enum because link types allow multiple + * values. + * @note Assumes link types are ASCII text + */ +class HTMLPurifier_AttrDef_HTML_LinkTypes extends HTMLPurifier_AttrDef +{ + + /** + * Name config attribute to pull. + * @type string + */ + protected $name; + + /** + * @param string $name + */ + public function __construct($name) + { + $configLookup = array( + 'rel' => 'AllowedRel', + 'rev' => 'AllowedRev' + ); + if (!isset($configLookup[$name])) { + trigger_error( + 'Unrecognized attribute name for link ' . + 'relationship.', + E_USER_ERROR + ); + return; + } + $this->name = $configLookup[$name]; + } + + /** + * @param string $string + * @param HTMLPurifier_Config $config + * @param HTMLPurifier_Context $context + * @return bool|string + */ + public function validate($string, $config, $context) + { + $allowed = $config->get('Attr.' . $this->name); + if (empty($allowed)) { + return false; + } + + $string = $this->parseCDATA($string); + $parts = explode(' ', $string); + + // lookup to prevent duplicates + $ret_lookup = array(); + foreach ($parts as $part) { + $part = strtolower(trim($part)); + if (!isset($allowed[$part])) { + continue; + } + $ret_lookup[$part] = true; + } + + if (empty($ret_lookup)) { + return false; + } + $string = implode(' ', array_keys($ret_lookup)); + return $string; + } +} + +// vim: et sw=4 sts=4 |