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Diffstat (limited to 'inc/3rdparty/htmlpurifier/HTMLPurifier/AttrTransform/Nofollow.php')
-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/AttrTransform/Nofollow.php52
1 files changed, 52 insertions, 0 deletions
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrTransform/Nofollow.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrTransform/Nofollow.php
new file mode 100644
index 00000000..25173c21
--- /dev/null
+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrTransform/Nofollow.php
@@ -0,0 +1,52 @@
1<?php
2
3// must be called POST validation
4
5/**
6 * Adds rel="nofollow" to all outbound links. This transform is
7 * only attached if Attr.Nofollow is TRUE.
8 */
9class HTMLPurifier_AttrTransform_Nofollow extends HTMLPurifier_AttrTransform
10{
11 /**
12 * @type HTMLPurifier_URIParser
13 */
14 private $parser;
15
16 public function __construct()
17 {
18 $this->parser = new HTMLPurifier_URIParser();
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['href'])) {
30 return $attr;
31 }
32
33 // XXX Kind of inefficient
34 $url = $this->parser->parse($attr['href']);
35 $scheme = $url->getSchemeObj($config, $context);
36
37 if ($scheme->browsable && !$url->isLocal($config, $context)) {
38 if (isset($attr['rel'])) {
39 $rels = explode(' ', $attr['rel']);
40 if (!in_array('nofollow', $rels)) {
41 $rels[] = 'nofollow';
42 }
43 $attr['rel'] = implode(' ', $rels);
44 } else {
45 $attr['rel'] = 'nofollow';
46 }
47 }
48 return $attr;
49 }
50}
51
52// vim: et sw=4 sts=4