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   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 of individual style sheets in designer mode.
  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  // Disable moodle specific debug messages and any errors in output,
  26  // comment out when debugging or better look into error log!
  27  define('NO_DEBUG_DISPLAY', true);
  28  define('NO_UPGRADE_CHECK', true);
  29  define('NO_MOODLE_COOKIES', true);
  30  
  31  require('../config.php');
  32  require_once($CFG->dirroot.'/lib/csslib.php');
  33  
  34  $themename = optional_param('theme', 'standard', PARAM_SAFEDIR);
  35  $type      = optional_param('type', '', PARAM_SAFEDIR);
  36  $subtype   = optional_param('subtype', '', PARAM_SAFEDIR);
  37  $sheet     = optional_param('sheet', '', PARAM_SAFEDIR);
  38  $usesvg    = optional_param('svg', 1, PARAM_BOOL);
  39  $chunk     = optional_param('chunk', null, PARAM_INT);
  40  
  41  if (file_exists("$CFG->dirroot/theme/$themename/config.php")) {
  42      // The theme exists in standard location - ok.
  43  } else if (!empty($CFG->themedir) and file_exists("$CFG->themedir/$themename/config.php")) {
  44      // Alternative theme location contains this theme - ok.
  45  } else {
  46      css_send_css_not_found();
  47  }
  48  
  49  $theme = theme_config::load($themename);
  50  $theme->force_svg_use($usesvg);
  51  
  52  if ($type === 'editor') {
  53      $csscontent = $theme->get_css_content_editor();
  54      css_send_uncached_css($csscontent);
  55  }
  56  
  57  $chunkurl = new moodle_url($CFG->httpswwwroot . '/theme/styles_debug.php', array('theme' => $themename,
  58      'type' => $type, 'subtype' => $subtype, 'sheet' => $sheet, 'usesvg' => $usesvg));
  59  
  60  // We need some kind of caching here because otherwise the page navigation becomes
  61  // way too slow in theme designer mode. Feel free to create full cache definition later...
  62  $key = "$type $subtype $sheet $usesvg";
  63  $cache = cache::make_from_params(cache_store::MODE_APPLICATION, 'core', 'themedesigner', array('theme' => $themename));
  64  if ($content = $cache->get($key)) {
  65      if ($content['created'] > time() - THEME_DESIGNER_CACHE_LIFETIME) {
  66          $csscontent = $content['data'];
  67  
  68          // We need to chunk the content.
  69          if ($chunk !== null) {
  70              $chunks = css_chunk_by_selector_count($csscontent, $chunkurl->out(false));
  71              $csscontent = ($chunk === 0) ? end($chunks) : $chunks[$chunk - 1];
  72          }
  73  
  74          css_send_uncached_css($csscontent);
  75      }
  76  }
  77  
  78  $csscontent = $theme->get_css_content_debug($type, $subtype, $sheet);
  79  $cache->set($key, array('data' => $csscontent, 'created' => time()));
  80  
  81  // We need to chunk the content.
  82  if ($chunk !== null) {
  83      // The chunks are ordered so that the last chunk is the one containing the @import, and so
  84      // the first one to be included. All the other chunks are set in the array before that one.
  85      // See {@link css_chunk_by_selector_count()} for more details.
  86      $chunks = css_chunk_by_selector_count($csscontent, $chunkurl->out(false));
  87      $csscontent = ($chunk === 0) ? end($chunks) : $chunks[$chunk - 1];
  88  }
  89  
  90  css_send_uncached_css($csscontent);