MDL-21241 theme CSS and JS gzip compression + some more fixes
[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/**
78946b9b 19 * This file is responsible for serving the one huge CSS of each theme.
b7009474 20 *
21 * @package moodlecore
78946b9b 22 * @copyright 2009 Petr Skoda (skodak) {@link http://skodak.org}
b7009474 23 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
24 */
25
73e504bc 26
78946b9b
PS
27// we need just the values from config.php and minlib.php
28define('ABORT_AFTER_CONFIG', true);
29require('../config.php'); // this stops immediately at the beginning of lib/setup.php
b7009474 30
78946b9b
PS
31$themename = min_optional_param('theme', 'standard', 'SAFEDIR');
32$type = min_optional_param('type', 'all', 'SAFEDIR');
33$rev = min_optional_param('rev', 0, 'INT');
b7009474 34
c724f835 35if (!in_array($type, array('all', 'ie', 'editor', 'plugins', 'parents', 'theme'))) {
78946b9b
PS
36 header('HTTP/1.0 404 not found');
37 die('Theme was not found, sorry.');
b7009474 38}
39
73e504bc
PS
40if (file_exists("$CFG->dirroot/theme/$themename/config.php")) {
41 // exists
42} else if (!empty($CFG->themedir) and file_exists("$CFG->themedir/$themename/config.php")) {
43 // exists
44} else {
78946b9b
PS
45 header('HTTP/1.0 404 not found');
46 die('Theme was not found, sorry.');
47}
b7009474 48
78946b9b
PS
49if ($type === 'ie') {
50 send_ie_css($themename, $rev);
51}
b7009474 52
78946b9b 53$candidatesheet = "$CFG->dataroot/cache/theme/$themename/css/$type.css";
b7009474 54
78946b9b
PS
55if (file_exists($candidatesheet)) {
56 if (!empty($_SERVER['HTTP_IF_NONE_MATCH'])) {
57 // we do not actually need to verify the etag value because our files
58 // never change in cache because we increment the rev parameter
59 header('HTTP/1.1 304 Not Modified');
60 die;
61 }
62 send_cached_css($candidatesheet, $rev);
b7009474 63}
64
78946b9b
PS
65//=================================================================================
66// ok, now we need to start normal moodle script, we need to load all libs and $DB
67define('ABORT_AFTER_CONFIG_CANCEL', true);
fdeb7fa1 68
78946b9b
PS
69define('NO_MOODLE_COOKIES', true); // Session not used here
70define('NO_UPGRADE_CHECK', true); // Ignore upgrade check
fdeb7fa1 71
78946b9b 72require("$CFG->dirroot/lib/setup.php");
b7009474 73
78946b9b 74$theme = theme_config::load($themename);
fdeb7fa1 75
78946b9b
PS
76if ($type === 'editor') {
77 $css = $theme->editor_css_content();
78 store_css($candidatesheet, $css);
79} else {
80 $css = $theme->css_content();
81 foreach ($css as $key=>$value) {
82 $sheet = '';
83 foreach($value as $val) {
84 if (is_array($val)) {
85 $sheet .= "\n\n".implode("\n\n", $val);
86 } else {
87 $sheet .= "\n\n".$val;
88 }
89 }
90 $css[$key] = $sheet;
91 $cssfile = "$CFG->dataroot/cache/theme/$themename/css/$key.css";
92 store_css($cssfile, $sheet);
fdeb7fa1 93 }
78946b9b
PS
94 $css = implode('', $css);
95 $cssfile = "$CFG->dataroot/cache/theme/$themename/css/all.css";
96 store_css($cssfile, $css);
fdeb7fa1 97}
98
78946b9b 99send_cached_css($candidatesheet, $rev);
b7009474 100
b7009474 101
78946b9b
PS
102//=================================================================================
103//=== utility functions ==
104// we are not using filelib because we need to fine tune all header
105// parameters to get the best performance.
b7009474 106
78946b9b
PS
107function store_css($csspath, $css) {
108 check_dir_exists(dirname($csspath), true, true);
109 $fp = fopen($csspath, 'w');
110 fwrite($fp, $css);
111 fclose($fp);
b7009474 112}
113
78946b9b
PS
114function send_ie_css($themename, $rev) {
115 $lifetime = 60*60*24*3;
116
117 $css = <<<EOF
118/** Unfortunately IE6/7 does not support more than 4096 selectors in one CSS file, which means we have to use some ugly hacks :-( **/
78946b9b
PS
119@import url(styles.php?theme=$themename&rev=$rev&type=plugins);
120@import url(styles.php?theme=$themename&rev=$rev&type=parents);
121@import url(styles.php?theme=$themename&rev=$rev&type=theme);
122
123EOF;
124
125 header('Etag: '.md5($rev));
126 header('Content-Disposition: inline; filename="styles.php"');
127 header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
128 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
129 header('Pragma: ');
130 header('Accept-Ranges: none');
131 header('Content-Type: text/css');
7c986f04
PS
132 if (!min_enable_zlib_compression()) {
133 header('Content-Length: '.strlen($css));
134 }
78946b9b 135
78946b9b
PS
136 echo $css;
137 die;
b7009474 138}
b7009474 139
78946b9b
PS
140function send_cached_css($csspath, $rev) {
141 $lifetime = 60*60*24*20;
b7009474 142
78946b9b
PS
143 header('Content-Disposition: inline; filename="styles.php"');
144 header('Last-Modified: '. gmdate('D, d M Y H:i:s', filemtime($csspath)) .' GMT');
145 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
146 header('Pragma: ');
147 header('Accept-Ranges: none');
148 header('Content-Type: text/css');
7c986f04
PS
149 if (!min_enable_zlib_compression()) {
150 header('Content-Length: '.filesize($csspath));
151 }
b7009474 152
78946b9b
PS
153 readfile($csspath);
154 die;
b7009474 155}