Catch another potential type of infinite recursion output initialisation.
[moodle.git] / theme / styles.php
CommitLineData
b7009474 1<?php
2
3// This file is part of Moodle - http://moodle.org/
4//
5// Moodle is free software: you can redistribute it and/or modify
6// it under the terms of the GNU General Public License as published by
7// the Free Software Foundation, either version 3 of the License, or
8// (at your option) any later version.
9//
10// Moodle is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
17
18/**
19 * This file is responsible for serving the CSS of each theme.
20 *
21 * It should not be linked to directly. Instead, it gets included by
22 * theme/themename/styles.php. See theme/standard/styles.php as an example.
23 *
24 * In this script, we are serving the styles for theme $themename, but we are
25 * serving them on behalf of theme $fortheme.
26 *
27 * To understand this, image that the currently selected theme is standardwhite.
28 * This theme uses both its own stylesheets, and also the ones from the standard theme.
29 * So, when we are serving theme/standard/styles.php, we need to use the config in
30 * theme/standardwhite/config.php to control the settings. This is controled by the
31 * for=... parameter in the URL.
32 *
33 * In case you are wondering, in the above scenario, we have to serve the standard
34 * theme CSS with a URL like theme/standard/styles.php, so that relative links from
35 * the CSS to images in the theme folder will work.
36 *
37 * @package moodlecore
38 * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
39 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
40 */
41
42if (empty($themename)) {
43 die('Direct access to this script is forbidden.');
44 // This script should only be required by theme/themename/styles.php.
45}
46
47// These may already be defined if we got here via style_sheet_setup in lib/deprecatedlib.php
48if (!defined('NO_MOODLE_COOKIES')) {
49 define('NO_MOODLE_COOKIES', true); // Session not used here
50}
51if (!defined('NO_UPGRADE_CHECK')) {
52 define('NO_UPGRADE_CHECK', true); // Ignore upgrade check
53}
54require_once(dirname(__FILE__) . '/../config.php');
55
56
57$fortheme = required_param('for', PARAM_FILE);
58$lang = optional_param('lang', '', PARAM_FILE);
59
60$CACHE_LIFETIME = 1800; // Cache stylesheets for half an hour.
61$DEFAULT_SHEET_LIST = array('styles_layout', 'styles_fonts', 'styles_color');
62
63// Fix for IE6 caching - we don't want the filemtime('styles.php'), instead use now.
64$lastmodified = time();
65
66// Set the correct content type. (Should we also be specifying charset here?)
67header('Content-type: text/css');
68if (!debugging('', DEBUG_DEVELOPER)) {
69 // Do not send caching headers for developer. (This makes it easy to edit themes.
70 // You don't have to keep clearing the browser cache.)
71 header('Last-Modified: ' . gmdate("D, d M Y H:i:s", $lastmodified) . ' GMT');
72 header('Expires: ' . gmdate("D, d M Y H:i:s", $lastmodified + $CACHE_LIFETIME) . ' GMT');
73 header('Cache-Control: max-age=' . $lifetime);
74 header('Pragma: ');
75}
76
77if (!empty($showdeprecatedstylesheetsetupwarning)) {
78 echo <<<END
79
80/***************************************************************
81 ***************************************************************
82 **** ****
83 **** WARNING! This theme uses an old-fashioned styles.php ****
84 **** file. It should be updated by copying styles.php from ****
85 **** the standard theme of a recent version of Moodle. ****
86 **** ****
87 ***************************************************************
88 ***************************************************************/
89
90
91
92END;
93}
94
95// Load the configuration of the selected theme. (See comment at the top of the file.)
96$PAGE->force_theme($fortheme);
97
98// Now work out which stylesheets we shold be serving from this theme.
99if ($themename == $fortheme) {
100 $themesheets = $THEME->sheets;
101
102} else if (!empty($THEME->parent) && $themename == $THEME->parent) {
103 if ($THEME->parentsheets === true) {
104 // Use all the sheets we have.
105 $themesheets = $DEFAULT_SHEET_LIST;
106 } else if (!empty($THEME->parentsheets)) {
107 $themesheets = $THEME->parentsheets;
108 } else {
109 echo "/* The current theme does not require anything from the standard theme. */\n\n";
110 exit;
111 }
112
113} else if ($themename == 'standard') {
114 if ($THEME->standardsheets === true) {
115 // Use all the sheets we have.
116 $themesheets = $DEFAULT_SHEET_LIST;
117 } else if (!empty($THEME->standardsheets)) {
118 $themesheets = $THEME->standardsheets;
119 } else {
120 echo "/* The current theme does not require anything from the standard theme. */\n\n";
121 exit;
122 }
123}
124
125// Conver the sheet names to file names.
126$files = array();
127foreach ($themesheets as $sheet) {
128 $files[] = $CFG->themedir . '/' . $themename . '/' . $sheet . '.css';
129}
130
131// If this is the standard theme, then also include the styles.php files from
132// each of the plugins, as determined by the theme settings.
133if ($themename == 'standard') {
134 if (!empty($THEME->modsheets)) {
135 $files += get_sheets_for_plugin_type('mod');
136 }
137
138 if (!empty($THEME->blocksheets)) {
139 $files += get_sheets_for_plugin_type('block');
140 }
141
142 if (!empty($THEME->courseformatsheets)) {
143 $files += get_sheets_for_plugin_type('format');
144 }
145
146 if (!empty($THEME->gradereportsheets)) {
147 $files += get_sheets_for_plugin_type('gradereport');
148 }
149
150 if (!empty($THEME->langsheets) && $lang) {
151 $file = $CFG->dirroot . '/lang/' . $lang . '/styles.php';
152 if (file_exists($file)) {
153 $files[] = $file;
154 }
155 }
156}
157
158if (empty($files)) {
159 echo "/* The current theme does not require anything from this theme. */\n\n";
160 exit;
161}
162
163// Output a commen with a summary of the included files.
164echo <<<END
165/*
166 * Styles from theme '$themename' for theme '$fortheme'
167 *
168 * Files included here:
169 *
170
171END;
172$toreplace = array($CFG->dirroot, $CFG->themedir);
173foreach ($files as $file) {
174 echo ' * ' . str_replace($toreplace, '', $file) . "\n";
175}
176echo " */\n\n";
177
178if (!empty($THEME->cssoutputfunction)) {
179 call_user_func($THEME->cssoutputfunction, $files);
180
181} else {
182 foreach ($files as $file) {
183 $shortname = str_replace($toreplace, '', $file);
184 echo '/******* ' . $shortname . " start *******/\n\n";
185 @include_once($file);
186 echo '/******* ' . $shortname . " end *******/\n\n";
187 }
188}
189
190function get_sheets_for_plugin_type($type) {
191 $files = array();
192 $mods = get_plugin_list($type);
193 foreach ($mods as $moddir) {
194 $file = $moddir . '/styles.php';
195 if (file_exists($file)) {
196 $files[] = $file;
197 }
198 }
199 return $files;
200}