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