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