1<?php
2
3/**
4 * Decorator that, depending on a token, switches between two definitions.
5 */
6class HTMLPurifier_AttrDef_Switch
7{
8
9    /**
10     * @type string
11     */
12    protected $tag;
13
14    /**
15     * @type HTMLPurifier_AttrDef
16     */
17    protected $withTag;
18
19    /**
20     * @type HTMLPurifier_AttrDef
21     */
22    protected $withoutTag;
23
24    /**
25     * @param string $tag Tag name to switch upon
26     * @param HTMLPurifier_AttrDef $with_tag Call if token matches tag
27     * @param HTMLPurifier_AttrDef $without_tag Call if token doesn't match, or there is no token
28     */
29    public function __construct($tag, $with_tag, $without_tag)
30    {
31        $this->tag = $tag;
32        $this->withTag = $with_tag;
33        $this->withoutTag = $without_tag;
34    }
35
36    /**
37     * @param string $string
38     * @param HTMLPurifier_Config $config
39     * @param HTMLPurifier_Context $context
40     * @return bool|string
41     */
42    public function validate($string, $config, $context)
43    {
44        $token = $context->get('CurrentToken', true);
45        if (!$token || $token->name !== $this->tag) {
46            return $this->withoutTag->validate($string, $config, $context);
47        } else {
48            return $this->withTag->validate($string, $config, $context);
49        }
50    }
51}
52
53// vim: et sw=4 sts=4
54