Issue #2881923 by israelshmueli, RajabNatshah: Include the BiDi JavaScript...

   inside /modules directory. See

   https://www.drupal.org/docs/8/extending-drupal-8/installing-modules

   for details of other optional locations.

3. Download version 4.6.2 of the JavaScript BiDi plugin from http://ckeditor.com/addon/bidi.

4. By default, place the downloaded JavaScript plugin directory (bidi) inside

   your installation /libraries directory. This directory does not exist initially

   so you might need to create it yourself. After placing the plugin directory

   in the default location its path will be something like /libraries/bidi/plugin.js

   ** Optionally: to be able to place the JS plugin in other location then /libraries,

   install the "Libraries API" module: https://www.drupal.org/project/libraries

   this will allow you, for example, to place the js plugin inside custom install

   profile or single site in multisite installation.

3. From version 8.x-2.x there is no need to manually download the JavaScript BiDi

   it is included with the module, inside its js directory.

5. Enable "CKEditor BiDi Buttons" module in Admin "Extend" page (/admin/modules).

6. Configure/Activate: Go to admin section of Drupal site /admin/config/content/formats

   select text format to configure and activate BiDi buttons by dragging them into

<?php

/**

 * @file

 * Install, update and uninstall functions for the CKEditor BiDi Buttons module.

 */

/**

 * Implements hook_requirements().

 */

function ckeditor_bidi_requirements($phase) {

  $requirements = [];

  $path = DRUPAL_ROOT . '/libraries/bidi/plugin.js';

  if (\Drupal::moduleHandler()->moduleExists('libraries')) {

    $path = libraries_get_path('bidi') . '/plugin.js';

  }

  if (!file_exists($path)) {

    $requirements['bidi_library'] = [

      'title' => t('CKEditor\'s BiDi (Text Direction) plugin library is missing'),

      'description' => t('"CKEditor BiDi Buttons" requires the plugin "BiDi (Text Direction)". <br> 

                                Please go and download version 4.6.2 of the BiDi plugin at: <br>

                                 http://ckeditor.com/addon/bidi <br>

                                 Then, place it in  /libraries directory of your installation.<br>

                                 For more detailes see see README.txt of the module.'),

      'severity'    => REQUIREMENT_ERROR,

    ];

  }

  return $requirements;

}

 */

use Drupal\Core\Routing\RouteMatchInterface;

use Drupal\Core\Url;

/**

 * Implements hook_help().

  switch ($route_name) {

    case 'help.page.ckeditor_bidi':

      $output = '';

      $output .= '<h3>' . t('<strong>Configure/Activare</strong>: Go to admin section of your Drupal site /admin/config/content/formats  select text format to configure and activate BiDi buttons by dragging them into active buttons area of the editor toolbar.About CKEditor BiDi Buttons') . '</h3>';

      $output .= '<p>' . t('This module integrates the <a href=":cke_bidi_url">CKEditor BiDi plugin</a> with CKEditor for Drupal 8.  This plugin provides the  bi directional text flow buttons,  RTL and LTR .',

      $output .= '<h3>' . t('About CKEditor BiDi Buttons module') . '</h3>';

      $output .= '<p>' . t('This module integrates the <a href=":cke_bidi_url">CKEditor BiDi(text direction) plugin</a> and make it available for CKEditor in Drupal 8.  The BiDi(text direction) plugin provides 2 bi directional text flow buttons,  RTL and LTR .',

          array(

            ':cke_bidi_url' => 'http://ckeditor.com/addon/bidi',

          )) . '</p>';

      $output .= '<p>' . t('The buttons provided by CKEditor BiDi plugin makes it possible to change the text direction for an HTML block-level content element like paragraph and list. If you ever created content in languages that are written Right to Left you are probably aware of the need to switch text flow direction.') . '</p>';

      $output .= '<h3>' . t('Configure/Activare') . '</h3>';

      $output .= '<h3>' . t('Configure/Activate') . '</h3>';

      $output .= '<p>' . t('Go to <a href=":formats">Text formats and editors</a> and click the "Configure" button of a text format that already have "CKEditor" selected as "Text Editor".',

            array(

            ':formats' => \Drupal::url('filter.admin_overview')

              ':formats' => Url::fromRoute('filter.admin_overview')->toString()

            )) . '</p>';

      $output .= '<p>' . t('Now, while on configuration page of chosen text format, look at the "Toolbar configuration" field/section, and you should be able to see 2 BiDi buttons ready to be dragged and dropped into your preffered section of the CKEditor buttons toolbar.') . '</p>';

     return $output;

  }

}

      $output .= '<p>' . t('Now, while on configuration page of chosen text format, look at the "Toolbar configuration" field/section, and you should be able to see 2 BiDi buttons ready to be dragged into CKEditor toolbar.') . '</p>';

/**

 * Implements hook_library_info_alter().

 */

function ckeditor_bidi_library_info_alter(&$libraries, $extension) {

  // Add support for "Libraries API" module, if exists.

  if ($extension == 'bidi' && \Drupal::moduleHandler()->moduleExists('libraries')) {

    $libraries['bidi']['js'] = ['/' . libraries_get_path('bidi') . '/plugin.js' => []];

     return $output;

  }

}