boot.php

<?php
/*
spl_autoload_register(function ($class) {
    $prefix = 'Tinymce4';
    $base_dir = dirname(__FILE__).'/src';

    $len = strlen($prefix);
    if (strncmp($prefix, $class, $len) !== 0) return;
    $relative_class = substr($class, $len);
    $file = $base_dir . str_replace('\\', '/', $relative_class) . '.php';
    if (file_exists($file)) {
        require $file;
    }
});
 */

if (rex::isBackend() && isset($_REQUEST['page']) && !isset($_REQUEST['_pjax'])) {
    // Tinymce core
    rex_view::addJsFile(rex_url::addonAssets('tinymce4', 'tinymce/tinymce.min.js'));

    // css klappt noch nicht im Moment, weil Dialog und 
    // Filemanager die gleichen Klassen verwenden, das Innere des Dialogs aber 
    // nicht responsive ist.
    //rex_view::addCssFile(rex_url::addonAssets('tinymce4', 'backend.css'));
    $user = \rex::getUser();
    if ($user) {
        $lang = $user->getLanguage();
        if ('' == $lang) {
            $lang = strtolower($dbconfig = \rex::getProperty('lang'));
        }
        $service_container = Tinymce4\Services\ServiceContainer::getInstance();
        $map = $service_container->getParameter('be_lang_map');
        if (!isset($map[$lang])) {
            $lang_pack = 'en_US';
        } else {
            $lang_pack = $map[$lang];
        } 
        // Tinymce Übersetzungen laden
        rex_view::addJsFile(rex_url::addonAssets('tinymce4', 'tinymce/langs/'.$lang_pack.'.js'));
        // Tinymce init script
        rex_view::addJsFile(rex_url::addonAssets('tinymce4', 'tinymce4_init.'.$lang_pack.'.js'));
        
        // Wenn Tinymce neu installiert wurde, gibt es die Datei noch nicht
        $filename = \rex_path::addonAssets('tinymce4', 'tinymce4_init.'.$lang_pack.'.js');
        if (!file_exists($filename)) {
            $service_container->get('ProfileRepository')->rebuildInitScripts();
        }
    }
}

if (isset($_REQUEST['tinymce4_call'])) {
    rex_extension::register('PACKAGES_INCLUDED', function($ep) {
        if (isset($_REQUEST['tinymce4_call'])) {
            $service_container = Tinymce4\Services\ServiceContainer::getInstance();
            echo $service_container->handleRoute($_REQUEST['tinymce4_call']);
            die();
        }
    });
}