1<?php
2
3use dokuwiki\Extension\ActionPlugin;
4use dokuwiki\Extension\EventHandler;
5use dokuwiki\Extension\Event;
6
7/**
8 * DokuWiki Plugin styling (Action Component)
9 *
10 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
11 * @author  Andreas Gohr <andi@splitbrain.org>
12 */
13class action_plugin_styling extends ActionPlugin
14{
15    /**
16     * Registers a callback functions
17     *
18     * @param EventHandler $controller DokuWiki's event controller object
19     * @return void
20     */
21    public function register(EventHandler $controller)
22    {
23        $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', $this, 'handleHeader');
24    }
25
26    /**
27     * Adds the preview parameter to the stylesheet loading in non-js mode
28     *
29     * @param Event $event event object by reference
30     * @param mixed $param [the parameters passed as fifth argument to register_hook() when this
31     *                      handler was registered]
32     * @return void
33     */
34    public function handleHeader(Event &$event, $param)
35    {
36        global $ACT;
37        global $INPUT;
38        if ($ACT != 'admin' || $INPUT->str('page') != 'styling') return;
39        /** @var admin_plugin_styling $admin */
40        $admin = plugin_load('admin', 'styling');
41        if (!$admin->isAccessibleByCurrentUser()) return;
42
43        // set preview
44        $len = count($event->data['link']);
45        for ($i = 0; $i < $len; $i++) {
46            if (
47                $event->data['link'][$i]['rel'] == 'stylesheet' &&
48                strpos($event->data['link'][$i]['href'], 'lib/exe/css.php') !== false
49            ) {
50                $event->data['link'][$i]['href'] .= '&preview=1&tseed=' . time();
51            }
52        }
53    }
54}
55
56// vim:ts=4:sw=4:et:
57