Proyectos de Subversion Moodle

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1 efrain 1 
<?php
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/**
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 * Validates a color according to the HTML spec.
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 */
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class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
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{
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    /**
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     * @param string $string
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     * @param HTMLPurifier_Config $config
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     * @param HTMLPurifier_Context $context
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     * @return bool|string
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     */
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    public function validate($string, $config, $context)
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    {
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        static $colors = null;
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        if ($colors === null) {
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            $colors = $config->get('Core.ColorKeywords');
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        }
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        $string = trim($string);
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        if (empty($string)) {
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            return false;
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        }
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        $lower = strtolower($string);
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        if (isset($colors[$lower])) {
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            return $colors[$lower];
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        }
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        if ($string[0] === '#') {
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            $hex = substr($string, 1);
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        } else {
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            $hex = $string;
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        }
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        $length = strlen($hex);
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        if ($length !== 3 && $length !== 6) {
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            return false;
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        }
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        if (!ctype_xdigit($hex)) {
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            return false;
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        }
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        if ($length === 3) {
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            $hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
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        }
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        return "#$hex";
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    }
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}
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// vim: et sw=4 sts=4