AccessibilityLinkController.php

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<?php
namespace TYPO3\CMS\Rtehtmlarea\Controller;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

class AccessibilityLinkController extends \TYPO3\CMS\Frontend\Plugin\AbstractPlugin
{
    public $prefixId = 'AccessibilityLinkController';

    public $scriptRelPath = 'Classes/Controller/AccessibilityLinkController.php';

    public $extKey = 'rtehtmlarea';

    public $conf = [];

    public $cObj;

    public function removeAccessibilityIcon($content, $conf)
    {
        // If the link was not rendered
        if (substr($content, 0, 3) !== '<a ' && substr($content, 0, 5) === '<img ') {
            // Let's remove the accessibility icon, if there is one
            $matches = [];
            if (preg_match('/^<img .*>/', $content, $matches) === 1) {
                $attributes = \TYPO3\CMS\Core\Utility\GeneralUtility::get_tag_attributes($matches[0]);
                if ($attributes['src']) {
                    // Get RTE Configconfiguration
                    $pageTSConfig = $this->frontendController->getPagesTSconfig();
                    if (is_array($pageTSConfig) && is_array($pageTSConfig['RTE.'])) {
                        $classesAnchorConfiguration = $pageTSConfig['RTE.']['classesAnchor.'];
                        if (is_array($classesAnchorConfiguration)) {
                            // Make the url of the source relative
                            $siteUrl = \TYPO3\CMS\Core\Utility\GeneralUtility::getIndpEnv('TYPO3_SITE_URL');
                            if (\TYPO3\CMS\Core\Utility\GeneralUtility::isFirstPartOfStr($attributes['src'], $siteUrl)) {
                                $attributes['src'] = substr($attributes['src'], strlen($siteUrl));
                            }
                            // Lookup the RTE.classesAnchor array
                            foreach ($classesAnchorConfiguration as $item => $conf) {
                                if ($conf['image']) {
                                    $imagePath = $this->getFullFileName(trim(str_replace('\'', '', str_replace('"', '', $conf['image']))));
                                    if ($attributes['src'] === $imagePath) {
                                        // If found, remove the img tag and break
                                        $content = substr($content, strlen($matches[0]));
                                        break;
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
        return $content;
    }
    /*
     * Returns the full name of a file referenced in Page TSConfig
     */
    protected function getFullFileName($filename)
    {
        if (substr($filename, 0, 4) == 'EXT:') {
            list($extKey, $local) = explode('/', substr($filename, 4), 2);
            $newFilename = '';
            if ((string)$extKey !== '' && \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::isLoaded($extKey) && (string)$local !== '') {
                $newFilename = \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::siteRelPath($extKey) . $local;
            }
        } elseif ($filename[0] !== '/') {
            $newFilename = $filename;
        } else {
            $newFilename = substr($filename, 1);
        }
        return  \TYPO3\CMS\Core\Utility\GeneralUtility::resolveBackPath($newFilename);
    }
}