1<?php
2
3/**
4 * Post-transform that performs validation to the name attribute; if
5 * it is present with an equivalent id attribute, it is passed through;
6 * otherwise validation is performed.
7 */
8class HTMLPurifier_AttrTransform_NameSync extends HTMLPurifier_AttrTransform
9{
10
11    /**
12     * @type HTMLPurifier_AttrDef_HTML_ID
13     */
14    public $idDef;
15
16    public function __construct()
17    {
18        $this->idDef = new HTMLPurifier_AttrDef_HTML_ID();
19    }
20
21    /**
22     * @param array $attr
23     * @param HTMLPurifier_Config $config
24     * @param HTMLPurifier_Context $context
25     * @return array
26     */
27    public function transform($attr, $config, $context)
28    {
29        if (!isset($attr['name'])) {
30            return $attr;
31        }
32        $name = $attr['name'];
33        if (isset($attr['id']) && $attr['id'] === $name) {
34            return $attr;
35        }
36        $result = $this->idDef->validate($name, $config, $context);
37        if ($result === false) {
38            unset($attr['name']);
39        } else {
40            $attr['name'] = $result;
41        }
42        return $attr;
43    }
44}
45
46// vim: et sw=4 sts=4
47