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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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namespace tool_brickfield\local\htmlchecker\common\checks;
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use tool_brickfield\local\htmlchecker\common\brickfield_accessibility_test;
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/**
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* Brickfield accessibility HTML checker library.
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*
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* Alt text for all img elements is not placeholder text unless author has confirmed it is correct.
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* 'img' element cannot have alt attribute value of "nbsp" or "spacer".
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*
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* @package tool_brickfield
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* @copyright 2020 onward: Brickfield Education Labs, www.brickfield.ie
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class img_alt_not_place_holder extends brickfield_accessibility_test {
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/** @var int The default severity code for this test. */
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public $defaultseverity = \tool_brickfield\local\htmlchecker\brickfield_accessibility::BA_TEST_SEVERE;
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/** @var \string[][] An array of strings, broken up by language domain. */
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public $strings =
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[
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'en' => array('nbsp', ' ', 'spacer', 'image', 'img', 'photo'),
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'es' => array('nbsp', ' ', 'spacer', 'espacio', 'imagen', 'img', 'foto'),
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];
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/**
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* The main check function. This is called by the parent class to actually check content.
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*/
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public function check(): void {
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foreach ($this->get_all_elements('img') as $img) {
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if ($img->hasAttribute('alt')) {
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if (strlen($img->getAttribute('alt')) > 0) {
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if (in_array($img->getAttribute('alt'), $this->translation())
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|| ord($img->getAttribute('alt')) == 194) {
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$this->add_report($img);
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} else if (preg_match("/^([0-9]*)(k|kb|mb|k bytes|k byte)?$/",
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strtolower($img->getAttribute('alt')))) {
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$this->add_report($img);
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}
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}
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}
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}
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}
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}
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