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<?php
/**
* Validates the HTML type length (not to be confused with CSS's length).
*
* This accepts integer pixels or percentages as lengths for certain
* HTML attributes.
*/
class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
{
/**
* @param string $string
* @param HTMLPurifier_Config $config
* @param HTMLPurifier_Context $context
* @return bool|string
*/
public function validate($string, $config, $context)
{
$string = trim($string);
if ($string === '') {
return false;
}
$parent_result = parent::validate($string, $config, $context);
if ($parent_result !== false) {
return $parent_result;
}
$length = strlen($string);
$last_char = $string[$length - 1];
if ($last_char !== '%') {
return false;
}
$points = substr($string, 0, $length - 1);
if (!is_numeric($points)) {
return false;
}
$points = (int)$points;
if ($points < 0) {
return '0%';
}
if ($points > 100) {
return '100%';
}
return ((string)$points) . '%';
}
}
// vim: et sw=4 sts=4
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