/**
* {@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']), file_upload_max_size());
$existing_file = isset($image_element['data-entity-uuid']) ? \Drupal::entityManager()->loadEntityByUuid('file', $image_element['data-entity-uuid']) : NULL;
$fid = $existing_file ? $existing_file->id() : NULL;
$form['fid'] = array('#title' => $this->t('Image'), '#type' => 'managed_file', '#upload_location' => $image_upload['scheme'] . '://' . $image_upload['directory'], '#default_value' => $fid ? array($fid) : NULL, '#upload_validators' => array('file_validate_extensions' => array('gif png jpg jpeg'), 'file_validate_size' => array($max_filesize), 'file_validate_image_resolution' => array($max_dimensions)), '#required' => TRUE);
$form['attributes']['src'] = array('#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'] = array('#title' => $this->t('Alternative text'), '#placeholder' => $this->t('Short description for the visually impaired'), '#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'] = array('#title' => $this->t('Align'), '#type' => 'radios', '#options' => array('none' => $this->t('None'), 'left' => $this->t('Left'), 'center' => $this->t('Center'), 'right' => $this->t('Right')), '#default_value' => $image_element['data-align'] === '' ? 'none' : $image_element['data-align'], '#wrapper_attributes' => array('class' => array('container-inline')), '#attributes' => array('class' => array('container-inline')), '#parents' => array('attributes', 'data-align'));
}
// When Drupal core's filter_caption is being used, the text editor may
// offer the ability to in-place edit the image's caption: show a toggle.
if (isset($image_element['hasCaption']) && $editor->getFilterFormat()->filters('filter_caption')->status) {
$form['caption'] = array('#title' => $this->t('Caption'), '#type' => 'checkbox', '#default_value' => $image_element['hasCaption'] === 'true', '#parents' => array('attributes', 'hasCaption'));
}
$form['actions'] = array('#type' => 'actions');
$form['actions']['save_modal'] = array('#type' => 'submit', '#value' => $this->t('Save'), '#submit' => array(), '#ajax' => array('callback' => '::submitForm', 'event' => 'click'));
return $form;
}