theme/styles.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * This file is responsible for serving the one huge CSS of each theme.
  19  *
  20  * @package   core
  21  * @copyright 2009 Petr Skoda (skodak)  {@link http://skodak.org}
  22  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25
  26 // disable moodle specific debug messages and any errors in output,
  27 // comment out when debugging or better look into error log!
  28 define('NO_DEBUG_DISPLAY', true);
  29
  30 // we need just the values from config.php and minlib.php
  31 define('ABORT_AFTER_CONFIG', true);
  32 require('../config.php'); // this stops immediately at the beginning of lib/setup.php
  33 require_once($CFG->dirroot.'/lib/csslib.php');
  34
  35 if ($slashargument = min_get_slash_argument()) {
  36     $slashargument = ltrim($slashargument, '/');
  37     if (substr_count($slashargument, '/') < 2) {
  38         css_send_css_not_found();
  39     }
  40
  41     if (strpos($slashargument, '_s/') === 0) {
  42         // Can't use SVG
  43         $slashargument = substr($slashargument, 3);
  44         $usesvg = false;
  45     } else {
  46         $usesvg = true;
  47     }
  48
  49     $chunk = null;
  50     if (preg_match('#/(chunk(\d+)(/|$))#', $slashargument, $matches)) {
  51         $chunk = (int)$matches[2];
  52         $slashargument = str_replace($matches[1], '', $slashargument);
  53     }
  54
  55     list($themename, $rev, $type) = explode('/', $slashargument, 3);
  56     $themename = min_clean_param($themename, 'SAFEDIR');
  57     $rev       = min_clean_param($rev, 'INT');
  58     $type      = min_clean_param($type, 'SAFEDIR');
  59
  60 } else {
  61     $themename = min_optional_param('theme', 'standard', 'SAFEDIR');
  62     $rev       = min_optional_param('rev', 0, 'INT');
  63     $type      = min_optional_param('type', 'all', 'SAFEDIR');
  64     $chunk     = min_optional_param('chunk', null, 'INT');
  65     $usesvg    = (bool)min_optional_param('svg', '1', 'INT');
  66 }
  67
  68 if (!in_array($type, array('all', 'ie', 'editor', 'plugins', 'parents', 'theme'))) {
  69     header('HTTP/1.0 404 not found');
  70     die('Theme was not found, sorry.');
  71 }
  72
  73 if (file_exists("$CFG->dirroot/theme/$themename/config.php")) {
  74     // exists
  75 } else if (!empty($CFG->themedir) and file_exists("$CFG->themedir/$themename/config.php")) {
  76     // exists
  77 } else {
  78     header('HTTP/1.0 404 not found');
  79     die('Theme was not found, sorry.');
  80 }
  81
  82 if ($type === 'ie') {
  83     css_send_ie_css($themename, $rev, $etag, !empty($slashargument));
  84 }
  85
  86 $candidatedir = "$CFG->cachedir/theme/$themename/css";
  87 $etag = "$themename/$rev/$type";
  88 $candidatename = $type;
  89 if (!$usesvg) {
  90     // Add to the sheet name, one day we'll be able to just drop this.
  91     $candidatedir .= '/nosvg';
  92     $etag .= '/nosvg';
  93 }
  94 if ($chunk !== null) {
  95     $etag .= '/chunk'.$chunk;
  96     $candidatename .= '.'.$chunk;
  97 }
  98 $candidatesheet = "$candidatedir/$candidatename.css";
  99 $etag = sha1($etag);
 100
 101 if (file_exists($candidatesheet)) {
 102     if (!empty($_SERVER['HTTP_IF_NONE_MATCH']) || !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
 103         // we do not actually need to verify the etag value because our files
 104         // never change in cache because we increment the rev parameter
 105         css_send_unmodified(filemtime($candidatesheet), $etag);
 106     }
 107     css_send_cached_css($candidatesheet, $etag);
 108 }
 109
 110 //=================================================================================
 111 // ok, now we need to start normal moodle script, we need to load all libs and $DB
 112 define('ABORT_AFTER_CONFIG_CANCEL', true);
 113
 114 define('NO_MOODLE_COOKIES', true); // Session not used here
 115 define('NO_UPGRADE_CHECK', true);  // Ignore upgrade check
 116
 117 require("$CFG->dirroot/lib/setup.php");
 118
 119 $theme = theme_config::load($themename);
 120 $theme->force_svg_use($usesvg);
 121
 122 $rev = theme_get_revision();
 123
 124 $etag = "$themename/$rev/$type";
 125 if (!$usesvg) {
 126     // Add to the etag, one day we'll be able to just delete svg nonsense this.
 127     $etag .= '/nosvg';
 128 }
 129 $etag = sha1($etag);
 130
 131 if ($type === 'editor') {
 132     $cssfiles = $theme->editor_css_files();
 133     css_store_css($theme, $candidatesheet, $cssfiles);
 134 } else {
 135     // IE requests plugins/parents/theme instead of all at once.
 136     $basedir = "$CFG->cachedir/theme/$themename/css";
 137     if (!$usesvg) {
 138         $basedir .= '/nosvg';
 139     }
 140     $css = $theme->css_files();
 141     $allfiles = array();
 142     $relroot = preg_replace('|^http.?://[^/]+|', '', $CFG->wwwroot);
 143     foreach ($css as $key=>$value) {
 144         if (!empty($slashargument)) {
 145             if ($usesvg) {
 146                 $chunkurl = "{$relroot}/theme/styles.php/{$themename}/{$rev}/{$key}";
 147             } else {
 148                 $chunkurl = "{$relroot}/theme/styles.php/_s/{$themename}/{$rev}/{$key}";
 149             }
 150         } else {
 151             if ($usesvg) {
 152                 $chunkurl = "{$relroot}/theme/styles.php?theme={$themename}&rev={$rev}&type={$key}";
 153             } else {
 154                 $chunkurl = "{$relroot}/theme/styles.php?theme={$themename}&rev={$rev}&type={$key}&svg=0";
 155             }
 156         }
 157         $cssfiles = array();
 158         foreach($value as $val) {
 159             if (is_array($val)) {
 160                 foreach ($val as $k=>$v) {
 161                     $cssfiles[] = $v;
 162                 }
 163             } else {
 164                 $cssfiles[] = $val;
 165             }
 166         }
 167         $cssfile = "$basedir/$key.css";
 168         css_store_css($theme, $cssfile, $cssfiles, true, $chunkurl);
 169         $allfiles = array_merge($allfiles, $cssfiles);
 170     }
 171     $cssfile = "$basedir/all.css";
 172     css_store_css($theme, $cssfile, $allfiles);
 173 }
 174
 175 // verify nothing failed in cache file creation
 176 clearstatcache();
 177 if (!file_exists($candidatesheet)) {
 178     css_send_css_not_found();
 179 }
 180
 181 css_send_cached_css($candidatesheet, $etag);