68 lines
2.0 KiB
PHP
68 lines
2.0 KiB
PHP
<?php
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/**
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* Injector that converts http, https and ftp text URLs to actual links.
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*/
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class HTMLPurifier_Injector_Linkify extends HTMLPurifier_Injector
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{
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/**
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* @type string
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*/
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public $name = 'Linkify';
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/**
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* @type array
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*/
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public $needed = array('a' => array('href'));
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/**
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* @param HTMLPurifier_Token $token
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*/
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public function handleText(&$token)
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{
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if (!$this->allowsElement('a')) {
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return;
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}
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if (strpos($token->data, '://') === false) {
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// our really quick heuristic failed, abort
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// this may not work so well if we want to match things like
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// "google.com", but then again, most people don't
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return;
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}
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// there is/are URL(s). Let's split the string.
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// We use this regex:
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// https://gist.github.com/gruber/249502
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// but with @cscott's backtracking fix and also
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// the Unicode characters un-Unicodified.
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$bits = preg_split(
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'/\\b((?:[a-z][\\w\\-]+:(?:\\/{1,3}|[a-z0-9%])|www\\d{0,3}[.]|[a-z0-9.\\-]+[.][a-z]{2,4}\\/)(?:[^\\s()<>]|\\((?:[^\\s()<>]|(?:\\([^\\s()<>]+\\)))*\\))+(?:\\((?:[^\\s()<>]|(?:\\([^\\s()<>]+\\)))*\\)|[^\\s`!()\\[\\]{};:\'".,<>?\x{00ab}\x{00bb}\x{201c}\x{201d}\x{2018}\x{2019}]))/iu',
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$token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
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if ($bits === false) {
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return;
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}
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$token = array();
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// $i = index
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// $c = count
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// $l = is link
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for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) {
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if (!$l) {
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if ($bits[$i] === '') {
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continue;
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}
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$token[] = new HTMLPurifier_Token_Text($bits[$i]);
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} else {
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$token[] = new HTMLPurifier_Token_Start('a', array('href' => $bits[$i]));
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$token[] = new HTMLPurifier_Token_Text($bits[$i]);
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$token[] = new HTMLPurifier_Token_End('a');
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}
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}
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}
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}
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// vim: et sw=4 sts=4
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