entity_embed.module

<?php

/**
 * @file
 * Framework for allowing entities to be embedded using CKEditor plugin and text
 * format.
 */

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Url;

/**
 * Implements hook_help().
 */
function entity_embed_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'entity_embed_button.list':
      return '<p>' . t("Embed buttons define the buttons that can be added to CKEditor's toolbar. All buttons correspond to the selcted entity type, although a particular entity type can have more than one buttons. After you've created the desired buttons, go to <a href='@filterformats'>Text formats and editors configuration</a> page to add them to CKEditor's toolbar. Make sure to add <em>&lt;drupal-entity&gt;</em> to the list of 'Allowed HTML tags'.", array('@filterformats' => Url::fromRoute('filter.admin_overview')->toString())) . '</p>';
  }
}