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class EditorImageDialog in Drupal 8

Same name and namespace in other branches
  1. 9 core/modules/editor/src/Form/EditorImageDialog.php \Drupal\editor\Form\EditorImageDialog

Provides an image dialog for text editors.

@internal

Hierarchy

Expanded class hierarchy of EditorImageDialog

1 file declares its use of EditorImageDialog
EditorImageDialogTest.php in core/modules/editor/tests/src/Kernel/EditorImageDialogTest.php
1 string reference to 'EditorImageDialog'
editor.routing.yml in core/modules/editor/editor.routing.yml
core/modules/editor/editor.routing.yml

File

core/modules/editor/src/Form/EditorImageDialog.php, line 22

Namespace

Drupal\editor\Form
View source 
class EditorImageDialog extends FormBase {

  /**
   * The file storage service.
   *
   * @var \Drupal\Core\Entity\EntityStorageInterface
   */
  protected $fileStorage;

  /**
   * Constructs a form object for image dialog.
   *
   * @param \Drupal\Core\Entity\EntityStorageInterface $file_storage
   *   The file storage service.
   */
  public function __construct(EntityStorageInterface $file_storage) {
    $this->fileStorage = $file_storage;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('entity_type.manager')
      ->getStorage('file'));
  }

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'editor_image_dialog';
  }

  /**
   * {@inheritdoc}
   *
   * @param \Drupal\editor\Entity\Editor $editor
   *   The text editor to which this dialog corresponds.
   */
  public function buildForm(array $form, FormStateInterface $form_state, Editor $editor = NULL) {

    // This form is special, in that the default values do not come from the
    // server side, but from the client side, from a text editor. We must cache
    // this data in form state, because when the form is rebuilt, we will be
    // receiving values from the form, instead of the values from the text
    // editor. If we don't cache it, this data will be lost.
    if (isset($form_state
      ->getUserInput()['editor_object'])) {

      // By convention, the data that the text editor sends to any dialog is in
      // the 'editor_object' key. And the image dialog for text editors expects
      // that data to be the attributes for an <img> element.
      $image_element = $form_state
        ->getUserInput()['editor_object'];
      $form_state
        ->set('image_element', $image_element);
      $form_state
        ->setCached(TRUE);
    }
    else {

      // Retrieve the image element's attributes from form state.
      $image_element = $form_state
        ->get('image_element') ?: [];
    }
    $form['#tree'] = TRUE;
    $form['#attached']['library'][] = 'editor/drupal.editor.dialog';
    $form['#prefix'] = '<div id="editor-image-dialog-form">';
    $form['#suffix'] = '</div>';

    // Construct strings to use in the upload validators.
    $image_upload = $editor
      ->getImageUploadSettings();
    if (!empty($image_upload['max_dimensions']['width']) || !empty($image_upload['max_dimensions']['height'])) {
      $max_dimensions = $image_upload['max_dimensions']['width'] . 'x' . $image_upload['max_dimensions']['height'];
    }
    else {
      $max_dimensions = 0;
    }
    $max_filesize = min(Bytes::toInt($image_upload['max_size']), Environment::getUploadMaxSize());
    $existing_file = isset($image_element['data-entity-uuid']) ? \Drupal::service('entity.repository')
      ->loadEntityByUuid('file', $image_element['data-entity-uuid']) : NULL;
    $fid = $existing_file ? $existing_file
      ->id() : NULL;
    $form['fid'] = [
      '#title' => $this
        ->t('Image'),
      '#type' => 'managed_file',
      '#upload_location' => $image_upload['scheme'] . '://' . $image_upload['directory'],
      '#default_value' => $fid ? [
        $fid,
      ] : NULL,
      '#upload_validators' => [
        'file_validate_extensions' => [
          'gif png jpg jpeg',
        ],
        'file_validate_size' => [
          $max_filesize,
        ],
        'file_validate_image_resolution' => [
          $max_dimensions,
        ],
      ],
      '#required' => TRUE,
    ];
    $form['attributes']['src'] = [
      '#title' => $this
        ->t('URL'),
      '#type' => 'textfield',
      '#default_value' => isset($image_element['src']) ? $image_element['src'] : '',
      '#maxlength' => 2048,
      '#required' => TRUE,
    ];

    // If the editor has image uploads enabled, show a managed_file form item,
    // otherwise show a (file URL) text form item.
    if ($image_upload['status']) {
      $form['attributes']['src']['#access'] = FALSE;
      $form['attributes']['src']['#required'] = FALSE;
    }
    else {
      $form['fid']['#access'] = FALSE;
      $form['fid']['#required'] = FALSE;
    }

    // The alt attribute is *required*, but we allow users to opt-in to empty
    // alt attributes for the very rare edge cases where that is valid by
    // specifying two double quotes as the alternative text in the dialog.
    // However, that *is* stored as an empty alt attribute, so if we're editing
    // an existing image (which means the src attribute is set) and its alt
    // attribute is empty, then we show that as two double quotes in the dialog.
    // @see https://www.drupal.org/node/2307647
    $alt = isset($image_element['alt']) ? $image_element['alt'] : '';
    if ($alt === '' && !empty($image_element['src'])) {
      $alt = '""';
    }
    $form['attributes']['alt'] = [
      '#title' => $this
        ->t('Alternative text'),
      '#description' => $this
        ->t('Short description of the image used by screen readers and displayed when the image is not loaded. This is important for accessibility.'),
      '#type' => 'textfield',
      '#required' => TRUE,
      '#required_error' => $this
        ->t('Alternative text is required.<br />(Only in rare cases should this be left empty. To create empty alternative text, enter <code>""</code> — two double quotes without any content).'),
      '#default_value' => $alt,
      '#maxlength' => 2048,
    ];

    // When Drupal core's filter_align is being used, the text editor may
    // offer the ability to change the alignment.
    if (isset($image_element['data-align']) && $editor
      ->getFilterFormat()
      ->filters('filter_align')->status) {
      $form['align'] = [
        '#title' => $this
          ->t('Align'),
        '#type' => 'radios',
        '#options' => [
          'none' => $this
            ->t('None'),
          'left' => $this
            ->t('Left'),
          'center' => $this
            ->t('Center'),
          'right' => $this
            ->t('Right'),
        ],
        '#default_value' => $image_element['data-align'] === '' ? 'none' : $image_element['data-align'],
        '#wrapper_attributes' => [
          'class' => [
            'container-inline',
          ],
        ],
        '#attributes' => [
          'class' => [
            'container-inline',
          ],
        ],
        '#parents' => [
          'attributes',
          'data-align',
        ],
      ];
    }

    // When Drupal core's filter_caption is being used, the text editor may
    // offer the ability to in-place edit the image's caption: show a toggle.
    if (isset($image_element['hasCaption']) && $editor
      ->getFilterFormat()
      ->filters('filter_caption')->status) {
      $form['caption'] = [
        '#title' => $this
          ->t('Caption'),
        '#type' => 'checkbox',
        '#default_value' => $image_element['hasCaption'] === 'true',
        '#parents' => [
          'attributes',
          'hasCaption',
        ],
      ];
    }
    $form['actions'] = [
      '#type' => 'actions',
    ];
    $form['actions']['save_modal'] = [
      '#type' => 'submit',
      '#value' => $this
        ->t('Save'),
      // No regular submit-handler. This form only works via JavaScript.
      '#submit' => [],
      '#ajax' => [
        'callback' => '::submitForm',
        'event' => 'click',
      ],
    ];
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $response = new AjaxResponse();

    // Convert any uploaded files from the FID values to data-entity-uuid
    // attributes and set data-entity-type to 'file'.
    $fid = $form_state
      ->getValue([
      'fid',
      0,
    ]);
    if (!empty($fid)) {

      /** @var \Drupal\file\FileInterface $file */
      $file = $this->fileStorage
        ->load($fid);
      $file_url = $file
        ->createFileUrl();
      $form_state
        ->setValue([
        'attributes',
        'src',
      ], $file_url);
      $form_state
        ->setValue([
        'attributes',
        'data-entity-uuid',
      ], $file
        ->uuid());
      $form_state
        ->setValue([
        'attributes',
        'data-entity-type',
      ], 'file');
    }

    // When the alt attribute is set to two double quotes, transform it to the
    // empty string: two double quotes signify "empty alt attribute". See above.
    if (trim($form_state
      ->getValue([
      'attributes',
      'alt',
    ])) === '""') {
      $form_state
        ->setValue([
        'attributes',
        'alt',
      ], '');
    }
    if ($form_state
      ->getErrors()) {
      unset($form['#prefix'], $form['#suffix']);
      $form['status_messages'] = [
        '#type' => 'status_messages',
        '#weight' => -10,
      ];
      $response
        ->addCommand(new HtmlCommand('#editor-image-dialog-form', $form));
    }
    else {
      $response
        ->addCommand(new EditorDialogSave($form_state
        ->getValues()));
      $response
        ->addCommand(new CloseModalDialogCommand());
    }
    return $response;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
DependencySerializationTrait::$_entityStorages protected property An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
EditorImageDialog::$fileStorage protected property The file storage service.
EditorImageDialog::buildForm public function Overrides FormInterface::buildForm
EditorImageDialog::create public static function Instantiates a new instance of this class. Overrides FormBase::create
EditorImageDialog::getFormId public function Returns a unique string identifying the form. Overrides FormInterface::getFormId
EditorImageDialog::submitForm public function Form submission handler. Overrides FormInterface::submitForm
EditorImageDialog::__construct public function Constructs a form object for image dialog.
FormBase::$configFactory protected property The config factory. 1
FormBase::$requestStack protected property The request stack. 1
FormBase::$routeMatch protected property The route match.
FormBase::config protected function Retrieves a configuration object.
FormBase::configFactory protected function Gets the config factory for this form. 1
FormBase::container private function Returns the service container.
FormBase::currentUser protected function Gets the current user.
FormBase::getRequest protected function Gets the request object.
FormBase::getRouteMatch protected function Gets the route match.
FormBase::logger protected function Gets the logger for a specific channel.
FormBase::redirect protected function Returns a redirect response object for the specified route. Overrides UrlGeneratorTrait::redirect
FormBase::resetConfigFactory public function Resets the configuration factory.
FormBase::setConfigFactory public function Sets the config factory for this form.
FormBase::setRequestStack public function Sets the request stack object to use.
FormBase::validateForm public function Form validation handler. Overrides FormInterface::validateForm 62
LinkGeneratorTrait::$linkGenerator protected property The link generator. 1
LinkGeneratorTrait::getLinkGenerator Deprecated protected function Returns the link generator.
LinkGeneratorTrait::l Deprecated protected function Renders a link to a route given a route name and its parameters.
LinkGeneratorTrait::setLinkGenerator Deprecated public function Sets the link generator service.
LoggerChannelTrait::$loggerFactory protected property The logger channel factory service.
LoggerChannelTrait::getLogger protected function Gets the logger for a specific channel.
LoggerChannelTrait::setLoggerFactory public function Injects the logger channel factory.
MessengerTrait::$messenger protected property The messenger. 29
MessengerTrait::messenger public function Gets the messenger. 29
MessengerTrait::setMessenger public function Sets the messenger.
RedirectDestinationTrait::$redirectDestination protected property The redirect destination service. 1
RedirectDestinationTrait::getDestinationArray protected function Prepares a 'destination' URL query parameter for use with \Drupal\Core\Url.
RedirectDestinationTrait::getRedirectDestination protected function Returns the redirect destination service.
RedirectDestinationTrait::setRedirectDestination public function Sets the redirect destination service.
StringTranslationTrait::$stringTranslation protected property The string translation service. 1
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language.
UrlGeneratorTrait::$urlGenerator protected property The url generator.
UrlGeneratorTrait::getUrlGenerator Deprecated protected function Returns the URL generator service.
UrlGeneratorTrait::setUrlGenerator Deprecated public function Sets the URL generator service.
UrlGeneratorTrait::url Deprecated protected function Generates a URL or path for a specific route based on the given parameters.