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<?php // This file is part of Moodle - http://moodle.org/ // // Moodle is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Moodle is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Moodle. If not, see <http://www.gnu.org/licenses/>. namespace tool_brickfield\local\htmlchecker\common\checks; use tool_brickfield\local\htmlchecker\common\brickfield_accessibility_test; /** * Brickfield accessibility HTML checker library. * * Alt text for all img elements used as source anchors is not empty when there is no other text in the anchor. * img element cannot have alt attribute value of null or whitespace if the img element is contained by an * a element and there is no other link text. * * @package tool_brickfield * @copyright 2020 onward: Brickfield Education Labs, www.brickfield.ie * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later / class img_alt_not_empty_in_anchor extends brickfield_accessibility_test { /* @var int The default severity code for this test. / public $defaultseverity = \tool_brickfield\local\htmlchecker\brickfield_accessibility::BA_TEST_SEVERE; /* * The main check function. This is called by the parent class to actually check content */ public function check(): void { foreach ($this->get_all_elements('a') as $a) { if (!$a->nodeValue && $a->childNodes) { foreach ($a->childNodes as $child) { if ($this->property_is_equal($child, 'tagName', 'img') && trim($child->getAttribute('alt')) == '') { $this->add_report($child); } } } } } }

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