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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; /** * Helper function to support checking the varous color attributes of the <body> tag against WCAG standards * * @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 body_color_contrast extends brickfield_accessibility_color_test { /* @var string The attribute to check for the background color of the <body> tag / public $background = 'bgcolor'; /* @var string The attribute to check for the foreground color of the <body> tag / public $foreground = 'text'; /* * Compares the WCAG contrast on the given color attributes of the <body> tag */ public function check() { $body = $this->get_all_elements('body'); if (!$body) { return false; } $body = $body[0]; if ($body->hasAttribute($this->foreground) && $body->hasAttribute($this->background)) { if ($this->get_luminosity($body->getAttribute($this->foreground), $body->getAttribute($this->background)) < 5) { $this->add_report(null, null, false); } } } }

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