1<?php
2/**
3 * DokuWiki Plugin preventzerowidthchars (Action Component)
4 *
5 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
6 * @author  Michael Große <grosse@cosmocode.de>
7 */
8
9// must be run within Dokuwiki
10if(!defined('DOKU_INC')) die();
11
12class action_plugin_preventzerowidthchars extends DokuWiki_Action_Plugin {
13
14    /**
15     * Registers a callback function for a given event
16     *
17     * @param Doku_Event_Handler $controller DokuWiki's event controller object
18     * @return void
19     */
20    public function register(Doku_Event_Handler $controller) {
21       $controller->register_hook('COMMON_WIKIPAGE_SAVE', 'BEFORE', $this, 'handle_common_wikipage_save');
22    }
23
24    /**
25     * [Custom event handler which performs action]
26     *
27     * @param Doku_Event $event  event object by reference
28     * @param mixed      $param  [the parameters passed as fifth argument to register_hook() when this
29     *                           handler was registered]
30     * @return void
31     */
32
33    public function handle_common_wikipage_save(Doku_Event $event, $param) {
34        $event->data['newContent'] = $this->replaceZeroWidthChars($event->data['newContent']);
35    }
36
37
38    public function replaceZeroWidthChars($uncleanText) {
39        $cleanedText = strtr($uncleanText, [
40            "\xE2\x80\x8B" => '', // zero width space
41        ]);
42        return $cleanedText;
43    }
44
45}
46
47// vim:ts=4:sw=4:et:
48