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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   * Moodle implementation of RTLCSS.
  19   *
  20   * @package    core
  21   * @copyright  2016 Frédéric Massart
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  defined('MOODLE_INTERNAL') || die();
  26  
  27  /**
  28   * Moodle RTLCSS class.
  29   *
  30   * @package    core
  31   * @copyright  2016 Frédéric Massart
  32   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  33   */
  34  class core_rtlcss extends \MoodleHQ\RTLCSS\RTLCSS {
  35  
  36      /**
  37       * Process a block declaration.
  38       *
  39       * This is overriden in order to provide a backwards compability with the plugins
  40       * who already defined RTL styles the old-fashioned way. Because we do not need
  41       * those any more we rename them so that they do not apply.
  42       *
  43       * @todo Remove the dir-rtl flipping when dir-rtl is fully deprecated.
  44       * @param \Sabberworm\CSS\RuleSet\RuleSet $node The object.
  45       * @return void
  46       */
  47      protected function processDeclaration($node) {
  48          $selectors = $node instanceof \Sabberworm\CSS\RuleSet\DeclarationBlock ? $node->getSelectors() : [];
  49          foreach ($selectors as $selector) {
  50              // The blocks containing .dir-rtl are always accepted as is.
  51              if (strpos($selector->getSelector(), '.dir-rtl') !== false) {
  52                  return;
  53              }
  54          }
  55          return parent::processDeclaration($node);
  56      }
  57  
  58  }