<?php

namespace WPDT;

/**
 * Validates an integer representation of pixels according to the HTML spec.
 */
class HTMLPurifier_AttrDef_HTML_Pixels extends \WPDT\HTMLPurifier_AttrDef
{
    /**
     * @type int
     */
    protected $max;
    /**
     * @param int $max
     */
    public function __construct($max = null)
    {
        $this->max = $max;
    }
    /**
     * @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 === '0') {
            return $string;
        }
        if ($string === '') {
            return \false;
        }
        $length = \strlen($string);
        if (\substr($string, $length - 2) == 'px') {
            $string = \substr($string, 0, $length - 2);
        }
        if (!\is_numeric($string)) {
            return \false;
        }
        $int = (int) $string;
        if ($int < 0) {
            return '0';
        }
        // upper-bound value, extremely high values can
        // crash operating systems, see <http://ha.ckers.org/imagecrash.html>
        // WARNING, above link WILL crash you if you're using Windows
        if ($this->max !== null && $int > $this->max) {
            return (string) $this->max;
        }
        return (string) $int;
    }
    /**
     * @param string $string
     * @return HTMLPurifier_AttrDef
     */
    public function make($string)
    {
        if ($string === '') {
            $max = null;
        } else {
            $max = (int) $string;
        }
        $class = \get_class($this);
        return new $class($max);
    }
}
// vim: et sw=4 sts=4
