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<?php /** * Decorator which enables !important to be used in CSS values. */ class HTMLPurifier_AttrDef_CSS_ImportantDecorator extends HTMLPurifier_AttrDef { /** * @type HTMLPurifier_AttrDef */ public $def; /** * @type bool */ public $allow; /** * @param HTMLPurifier_AttrDef $def Definition to wrap * @param bool $allow Whether or not to allow !important */ public function __construct($def, $allow = false) { $this->def = $def; $this->allow = $allow; } /** * Intercepts and removes !important if necessary * @param string $string * @param HTMLPurifier_Config $config * @param HTMLPurifier_Context $context * @return bool|string */ public function validate($string, $config, $context) { // test for ! and important tokens $string = trim($string); $is_important = false; // :TODO: optimization: test directly for !important and ! important if (strlen($string) >= 9 && substr($string, -9) === 'important') { $temp = rtrim(substr($string, 0, -9)); // use a temp, because we might want to restore important if (strlen($temp) >= 1 && substr($temp, -1) === '!') { $string = rtrim(substr($temp, 0, -1)); $is_important = true; } } $string = $this->def->validate($string, $config, $context); if ($this->allow && $is_important) { $string .= ' !important'; } return $string; } } // vim: et sw=4 sts=4