HTMLPurifier 4.4.0
/home/ezyang/Dev/htmlpurifier/library/HTMLPurifier/AttrDef/HTML/Color.php
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00001 <?php
00002 
00006 class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
00007 {
00008 
00009     public function validate($string, $config, $context) {
00010 
00011         static $colors = null;
00012         if ($colors === null) $colors = $config->get('Core.ColorKeywords');
00013 
00014         $string = trim($string);
00015 
00016         if (empty($string)) return false;
00017         if (isset($colors[strtolower($string)])) return $colors[$string];
00018         if ($string[0] === '#') $hex = substr($string, 1);
00019         else $hex = $string;
00020 
00021         $length = strlen($hex);
00022         if ($length !== 3 && $length !== 6) return false;
00023         if (!ctype_xdigit($hex)) return false;
00024         if ($length === 3) $hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
00025 
00026         return "#$hex";
00027 
00028     }
00029 
00030 }
00031 
00032 // vim: et sw=4 sts=4