mirror of https://github.com/friendica/friendica
33 lines
807 B
PHP
33 lines
807 B
PHP
<?php
|
|
|
|
/**
|
|
* Validates a color according to the HTML spec.
|
|
*/
|
|
class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
|
|
{
|
|
|
|
public function validate($string, $config, $context) {
|
|
|
|
static $colors = null;
|
|
if ($colors === null) $colors = $config->get('Core.ColorKeywords');
|
|
|
|
$string = trim($string);
|
|
|
|
if (empty($string)) return false;
|
|
if (isset($colors[$string])) return $colors[$string];
|
|
if ($string[0] === '#') $hex = substr($string, 1);
|
|
else $hex = $string;
|
|
|
|
$length = strlen($hex);
|
|
if ($length !== 3 && $length !== 6) return false;
|
|
if (!ctype_xdigit($hex)) return false;
|
|
if ($length === 3) $hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
|
|
|
|
return "#$hex";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// vim: et sw=4 sts=4
|