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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  namespace tool_brickfield\local\htmlchecker\common\checks;
  18  
  19  use tool_brickfield\local\htmlchecker\common\brickfield_accessibility_test;
  20  
  21  /**
  22   * Brickfield accessibility HTML checker library.
  23   *
  24   * All img elements must have an alt attribute.
  25   *
  26   * @package    tool_brickfield
  27   * @copyright  2020 onward: Brickfield Education Labs, www.brickfield.ie
  28   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  29   */
  30  class img_has_alt extends brickfield_accessibility_test {
  31  
  32      /** @var int The default severity code for this test. */
  33      public $defaultseverity = \tool_brickfield\local\htmlchecker\brickfield_accessibility::BA_TEST_SEVERE;
  34  
  35      /**
  36       * The main check function. This is called by the parent class to actually check content.
  37       */
  38      public function check(): void {
  39          foreach ($this->get_all_elements('img') as $img) {
  40              if (!$img->hasAttribute('alt') || ($img->getAttribute('alt') == '') || ($img->getAttribute('alt') == ' ')) {
  41                  if (!($img->hasAttribute('role') && ($img->getAttribute('role') == 'presentation'))) {
  42                      $this->add_report($img);
  43                  }
  44              }
  45          }
  46      }
  47  }