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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;
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/**
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* Special base class which provides helper methods for tables.
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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 brickfield_accessibility_table_test extends brickfield_accessibility_test {
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/**
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* Takes the element object of a main table and returns the number of rows and columns in it.
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* @param \stdClass $table
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* @return array An array with the 'rows' value showing the number of rows, and column showing the number of columns
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*/
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public function get_table(\stdClass $table): array {
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$rows = 0;
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$columns = 0;
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$firstrow = true;
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if ($table->tagName != 'table') {
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return false;
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}
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foreach ($table->childNodes as $child) {
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if (property_exists($child, 'tagName') && $child->tagName == 'tr') {
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$rows++;
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if ($firstrow) {
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foreach ($child->childNodes as $columnchild) {
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if ($columnchild->tagName == 'th' || $columnchild->tagName == 'td') {
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$columns++;
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}
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}
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$firstrow = false;
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}
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}
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}
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return ['rows' => $rows, 'columns' => $columns];
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}
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/**
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* Finds whether or not the table is a data table. Checks that the
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* table has a logical order and uses 'th' or 'thead' tags to illustrate
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* the page author thought it was a data table.
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* @param object $table The DOMElement object of the table tag
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* @return bool TRUE if the element is a data table, otherwise false
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*/
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public function is_data($table): bool {
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if ($table->tagName != 'table') {
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return false;
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}
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foreach ($table->childNodes as $child) {
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if (property_exists($child, 'tagName') && $child->tagName == 'tr') {
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foreach ($child->childNodes as $rowchild) {
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if (property_exists($rowchild, 'tagName') && $rowchild->tagName == 'th') {
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return true;
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}
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}
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}
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if (property_exists($child, 'tagName') && $child->tagName == 'thead') {
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return true;
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}
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}
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return false;
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}
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}
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