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<?php
/**
* Framework class for strings that involve multiple values.
*
* Certain CSS properties such as border-width and margin allow multiple
* lengths to be specified. This class can take a vanilla border-width
* definition and multiply it, usually into a max of four.
*
* @note Even though the CSS specification isn't clear about it, inherit
* can only be used alone: it will never manifest as part of a multi
* shorthand declaration. Thus, this class does not allow inherit.
*/
class HTMLPurifier_AttrDef_CSS_Multiple extends HTMLPurifier_AttrDef
{
/**
* Instance of component definition to defer validation to.
* @todo Make protected
*/
public $single;
/**
* Max number of values allowed.
* @todo Make protected
*/
public $max;
/**
* @param $single HTMLPurifier_AttrDef to multiply
* @param $max Max number of values allowed (usually four)
*/
public function __construct($single, $max = 4) {
$this->single = $single;
$this->max = $max;
}
public function validate($string, $config, $context) {
$string = $this->parseCDATA($string);
if ($string === '') return false;
$parts = explode(' ', $string); // parseCDATA replaced \r, \t and \n
$length = count($parts);
$final = '';
for ($i = 0, $num = 0; $i < $length && $num < $this->max; $i++) {
if (ctype_space($parts[$i])) continue;
$result = $this->single->validate($parts[$i], $config, $context);
if ($result !== false) {
$final .= $result . ' ';
$num++;
}
}
if ($final === '') return false;
return rtrim($final);
}
}
// vim: et sw=4 sts=4
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