@instructure/canvas-rce/es/rce/plugins/tinymce-a11y-checker/node-checker.js

A component wrapping Canvas's usage of Tinymce

/*
 * Copyright (C) 2018 - present Instructure, Inc.
 *
 * This file is part of Canvas.
 *
 * Canvas is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3 of the License.
 *
 * Canvas 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 Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import * as dom from './utils/dom';
import rules from './rules';
import { enhanceRules } from './utils/rule-enhancer';
export default function checkNode(node, done, config = {}, additionalRules = []) {
  if (!node) {
    return;
  }
  const errors = [];
  const childNodeCheck = child => {
    if (child.hasAttribute('data-ignore-a11y-check')) return;
    // Enhance all rules with TinyMCE notification functionality
    const composedRules = enhanceRules(rules.concat(additionalRules));
    for (const rule of composedRules) {
      Promise.resolve(rule.test(child, config)).then(result => {
        if (!result) {
          errors.push({
            node: child,
            rule
          });
        }
      });
    }
  };
  const checkDone = () => {
    if (typeof done === 'function') {
      done(errors);
    }
  };
  dom.walk(node, childNodeCheck, checkDone);
}