editor_advanced_image.module in Editor Advanced Image 8

Contains Editor Advanced Image module.

File

editor_advanced_image.module

<?php

/**
 * @file
 * Contains Editor Advanced Image module.
 */
use Drupal\Core\Form\FormStateInterface;
use Drupal\editor\Entity\Editor;

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Add a title fields on EditorLinkDialog.
 * Add an advanced dropdown containing:
 *  - class field
 *  - id field
 * Note: the editor_file module declares that its
 * Drupal\editor\Form\EditorImageDialog form uses
 *   'editor_image_dialog' as base_form_id. In this case, the function above is
 *   going to be called as an implementation of hook_form_BASE_FORM_ID_alter().
 */
function editor_advanced_image_form_editor_image_dialog_alter(&$form, FormStateInterface $form_state, $form_id) {
  $argument = $form_state
    ->getBuildInfo()['args'][0];
  $settings = $argument
    ->getSettings();

  // In case the only argument we get is the Editor instead of the FilterFormat.
  if ($argument instanceof Editor) {
    $argument = $argument
      ->getFilterFormat();
  }
  $restrictions = $argument
    ->getHtmlRestrictions();
  if (isset($form_state
    ->getUserInput()['editor_object'])) {
    $input = $form_state
      ->getUserInput()['editor_object'];
    $form_state
      ->set('image_element', $input);
    $form_state
      ->setCached(TRUE);
  }
  else {

    // Retrieve the link element's attributes from form state.
    $input = $form_state
      ->get('image_element') ?: [];
  }

  /*
   * Helper to retrieve form fields' default values.
   *
   * @param string $attribute_name
   * @param string $fallback
   *
   * @return mixed
   *   The existing value or the fallback.
   */
  $get_default_value = function ($attribute_name, $fallback = '') use ($input) {
    return !empty($input[$attribute_name]) ? $input[$attribute_name] : $fallback;
  };

  /*
   * Helper to set the status of a form field according to the status of the
   * filter about the attribute it is defining.
   *
   * @param string $attribute_name
   *
   * @return bool
   *   TRUE if the filter is disabled or if the entire "img" tag is allowed
   *   or if the given attribute is allowed for the "img" tag.
   */
  $is_accessible = function ($attribute_name) use ($restrictions) {
    return $restrictions === FALSE || $restrictions['allowed']['img'] === TRUE || !empty($restrictions['allowed']['img'][$attribute_name]);
  };
  $form['attributes']['title'] = [
    '#type' => 'textfield',
    '#title' => t('Title'),
    '#description' => t('Populates the title attribute of the image, usually shown as a small tooltip on hover.'),
    '#default_value' => $get_default_value('title'),
    '#maxlength' => 1024,
    '#weight' => 1,
    '#access' => $is_accessible('title'),
  ];
  $form['advanced'] = [
    '#type' => 'details',
    '#title' => t('Advanced'),
    '#access' => FALSE,
    '#weight' => 2,
  ];
  $default_class = NULL;
  if (!empty($settings['plugins']['editoradvancedimage']['default_class'])) {
    $default_class = '<br>' . t('Default: <code>:classes</code>.', [
      ':classes' => $settings['plugins']['editoradvancedimage']['default_class'],
    ]);
  }
  $form['attributes']['class'] = [
    '#type' => 'textfield',
    '#title' => t('CSS classes'),
    '#description' => t('List of CSS classes to add to the image, separated by spaces.') . $default_class,
    '#default_value' => $get_default_value('class'),
    '#maxlength' => 1024,
    '#access' => $is_accessible('class'),
    '#group' => 'advanced',
  ];
  $form['attributes']['id'] = [
    '#type' => 'textfield',
    '#title' => t('ID'),
    '#description' => t('Allows linking to this content using a <a href="https://en.wikipedia.org/wiki/Fragment_identifier">URL fragment</a>. Must be unique.'),
    '#default_value' => $get_default_value('id'),
    '#maxlength' => 1024,
    '#access' => $is_accessible('id'),
    '#group' => 'advanced',
  ];

  // Show the advanced group if at least one of its fields is accessible.
  foreach ($form['attributes'] as $element) {
    if (!empty($element['#group']) && $element['#group'] === 'advanced' && (!isset($element['#access']) || $element['#access'] === TRUE)) {
      $form['advanced']['#access'] = TRUE;
      break;
    }
  }

  // Add #validate callback that handles empty attributes.
  array_unshift($form['#validate'], '_editor_advanced_image_attributes_validate');
}

/**
 * Filter empty attributes to avoid empty HTML output.
 */
function _editor_advanced_image_attributes_validate(array &$form, FormStateInterface $form_state) {
  $values = $form_state
    ->getValue('attributes');
  $image_element = $form_state
    ->get('image_element');
  foreach ($values as $key => $value) {
    if (empty($value)) {
      $form_state
        ->setValue([
        'attributes',
        $key,
      ], '');

      // Special case on content creation.
      if (empty($image_element)) {
        $form_state
          ->unsetValue([
          'attributes',
          $key,
        ]);
      }
    }
  }
}

Functions

Name	Description
editor_advanced_image_form_editor_image_dialog_alter	Implements hook_form_FORM_ID_alter().
_editor_advanced_image_attributes_validate	Filter empty attributes to avoid empty HTML output.