<?php

/**
 * Allows multiple validators to attempt to validate attribute.
 *
 * Composite is just what it sounds like: a composite of many validators.
 * This means that multiple HTMLPurifier_AttrDef objects will have a whack
 * at the string.  If one of them passes, that's what is returned.  This is
 * especially useful for CSS values, which often are a choice between
 * an enumerated set of predefined values or a flexible data type.
 */
class HTMLPurifier_AttrDef_CSS_Composite extends HTMLPurifier_AttrDef {
	
	/**
	 * List of objects that may process strings.
	 * @type HTMLPurifier_AttrDef[]
	 * 
	 * @todo Make protected
	 */
	public $defs;
	
	/**
	 *
	 * @param HTMLPurifier_AttrDef[] $defs
	 *        	List of HTMLPurifier_AttrDef objects
	 */
	public function __construct($defs) {
		$this->defs = $defs;
	}
	
	/**
	 *
	 * @param string $string        	
	 * @param HTMLPurifier_Config $config        	
	 * @param HTMLPurifier_Context $context        	
	 * @return bool|string
	 */
	public function validate($string, $config, $context) {
		foreach ( $this->defs as $i => $def ) {
			$result = $this->defs [$i]->validate ( $string, $config, $context );
			if ($result !== false) {
				return $result;
			}
		}
		return false;
	}
}

// vim: et sw=4 sts=4