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<?php
/**
* Validates a ratio as defined by the CSS spec.
*/
class HTMLPurifier_AttrDef_CSS_Ratio extends HTMLPurifier_AttrDef
{
/**
* @param string $ratio Ratio to validate
* @param HTMLPurifier_Config $config Configuration options
* @param HTMLPurifier_Context $context Context
*
* @return string|boolean
*
* @warning Some contexts do not pass $config, $context. These
* variables should not be used without checking HTMLPurifier_Length
*/
public function validate($ratio, $config, $context)
{
$ratio = $this->parseCDATA($ratio);
$parts = explode('/', $ratio, 2);
$length = count($parts);
if ($length < 1 || $length > 2) {
return false;
}
$num = new \HTMLPurifier_AttrDef_CSS_Number();
if ($length === 1) {
return $num->validate($parts[0], $config, $context);
}
$num1 = $num->validate($parts[0], $config, $context);
$num2 = $num->validate($parts[1], $config, $context);
if ($num1 === false || $num2 === false) {
return false;
}
return $num1 . '/' . $num2;
}
}
// vim: et sw=4 sts=4
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