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-rw-r--r--library/HTMLPurifier/Injector/Linkify.php46
1 files changed, 46 insertions, 0 deletions
diff --git a/library/HTMLPurifier/Injector/Linkify.php b/library/HTMLPurifier/Injector/Linkify.php
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+++ b/library/HTMLPurifier/Injector/Linkify.php
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+<?php
+
+/**
+ * Injector that converts http, https and ftp text URLs to actual links.
+ */
+class HTMLPurifier_Injector_Linkify extends HTMLPurifier_Injector
+{
+
+ public $name = 'Linkify';
+ public $needed = array('a' => array('href'));
+
+ public function handleText(&$token) {
+ if (!$this->allowsElement('a')) return;
+
+ if (strpos($token->data, '://') === false) {
+ // our really quick heuristic failed, abort
+ // this may not work so well if we want to match things like
+ // "google.com", but then again, most people don't
+ return;
+ }
+
+ // there is/are URL(s). Let's split the string:
+ // Note: this regex is extremely permissive
+ $bits = preg_split('#((?:https?|ftp)://[^\s\'"<>()]+)#S', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
+
+ $token = array();
+
+ // $i = index
+ // $c = count
+ // $l = is link
+ for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) {
+ if (!$l) {
+ if ($bits[$i] === '') continue;
+ $token[] = new HTMLPurifier_Token_Text($bits[$i]);
+ } else {
+ $token[] = new HTMLPurifier_Token_Start('a', array('href' => $bits[$i]));
+ $token[] = new HTMLPurifier_Token_Text($bits[$i]);
+ $token[] = new HTMLPurifier_Token_End('a');
+ }
+ }
+
+ }
+
+}
+
+// vim: et sw=4 sts=4