theme/styles_debug.php

   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 of individual style sheets in designer mode.
  20  *
  21  * @package   moodlecore
  22  * @copyright 2009 Petr Skoda (skodak)  {@link http://skodak.org}
  23  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26
  27 define('ABORT_AFTER_CONFIG', true);
  28 require('../config.php'); // this stops immediately at the beginning of lib/setup.php
  29
  30 $themename = min_optional_param('theme', 'standard', 'SAFEDIR');
  31 $type      = min_optional_param('type', '', 'SAFEDIR');
  32 $subtype   = min_optional_param('subtype', '', 'SAFEDIR');
  33 $sheet     = min_optional_param('sheet', '', 'SAFEDIR');
  34
  35 if (!defined('THEME_DESIGNER_CACHE_LIFETIME')) {
  36     define('THEME_DESIGNER_CACHE_LIFETIME', 4); // this can be also set in config.php
  37 }
  38
  39 if (file_exists("$CFG->dirroot/theme/$themename/config.php")) {
  40     // exists
  41 } else if (!empty($CFG->themedir) and file_exists("$CFG->themedir/$themename/config.php")) {
  42     // exists
  43 } else {
  44     css_not_found();
  45 }
  46
  47 // no gzip compression when debugging
  48
  49 $candidatesheet = "$CFG->dataroot/cache/theme/$themename/designer.ser";
  50
  51 if (!file_exists($candidatesheet)) {
  52     css_not_found();
  53 }
  54
  55 if (!$css = file_get_contents($candidatesheet)) {
  56     css_not_found();
  57 }
  58
  59 $css = unserialize($css);
  60
  61 if ($type === 'ie') {
  62     // IE is a sloppy browser with weird limits, sorry
  63     if ($subtype === 'plugins') {
  64         $sendcss = implode("\n\n", $css['plugins']);
  65         $sendcss = str_replace("\n", "\r\n", $sendcss);
  66         send_uncached_css($sendcss);
  67
  68     } else if ($subtype === 'parents') {
  69         $sendcss = array();
  70         if (empty($sheet)) {
  71             // If not specific parent has been specified as $sheet then build a
  72             // collection of @import statements into this one sheet.
  73             // We shouldn't ever actually get here, but none the less we'll deal
  74             // with it incase we ever do.
  75             // @import statements arn't processed until after concurrent CSS requests
  76             // making them slightly evil.
  77             foreach (array_keys($css['parents']) as $sheet) {
  78                 $sendcss[] = "@import url(styles_debug.php?theme=$themename&type=$type&subtype=$subtype&sheet=$sheet);";
  79             }
  80         } else {
  81             // Build up the CSS for that parent so we can serve it as one file.
  82             foreach ($css[$subtype][$sheet] as $parent=>$css) {
  83                 $sendcss[] = $css;
  84             }
  85         }
  86         $sendcss = implode("\n\n", $sendcss);
  87         $sendcss = str_replace("\n", "\r\n", $sendcss);
  88         send_uncached_css($sendcss);
  89
  90     } else if ($subtype === 'theme') {
  91         $sendcss = implode("\n\n", $css['theme']);
  92         $sendcss = str_replace("\n", "\r\n", $sendcss);
  93         send_uncached_css($sendcss);
  94     }
  95
  96 } else if ($type === 'plugin') {
  97     if (isset($css['plugins'][$subtype])) {
  98         send_uncached_css($css['plugins'][$subtype]);
  99     }
 100
 101 } else if ($type === 'parent') {
 102     if (isset($css['parents'][$subtype][$sheet])) {
 103         send_uncached_css($css['parents'][$subtype][$sheet], 30); // parent sheets are not supposed to change much, right?
 104     }
 105
 106 } else if ($type === 'theme') {
 107     if (isset($css['theme'][$sheet])) {
 108         send_uncached_css($css['theme'][$sheet]);
 109     }
 110 }
 111 css_not_found();
 112
 113 //=================================================================================
 114 //=== utility functions ==
 115 // we are not using filelib because we need to fine tune all header
 116 // parameters to get the best performance.
 117
 118 function send_uncached_css($css) {
 119     header('Content-Disposition: inline; filename="styles_debug.php"');
 120     header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
 121     header('Expires: '. gmdate('D, d M Y H:i:s', time() + THEME_DESIGNER_CACHE_LIFETIME) .' GMT');
 122     header('Pragma: ');
 123     header('Accept-Ranges: none');
 124     header('Content-Type: text/css');
 125     //header('Content-Length: '.strlen($css));
 126
 127     echo($css);
 128     die;
 129 }
 130
 131 function css_not_found() {
 132     header('HTTP/1.0 404 not found');
 133     die('CSS was not found, sorry.');
 134 }
 135