ImageFieldTokensWigdet.php in ImageField Tokens 8

Namespace

Drupal\imagefield_tokens\Plugin\Field\FieldWidget

File

src/Plugin/Field/FieldWidget/ImageFieldTokensWigdet.php

<?php

namespace Drupal\imagefield_tokens\Plugin\Field\FieldWidget;

use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\file\Entity\File;
use Drupal\image\Plugin\Field\FieldWidget\ImageWidget;

/**
 * Plugin implementation of the 'image_image' widget.
 *
 * @FieldWidget(
 *   id = "imagefield_tokens",
 *   label = @Translation("Image Field Tokens"),
 *   field_types = {
 *     "image"
 *   }
 * )
 */
class ImageFieldTokensWigdet extends ImageWidget {

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    $element = parent::formElement($items, $delta, $element, $form, $form_state);

    // Get setting for token.
    $field_settings = $this
      ->getFieldSettings();
    $entity_type_id = $form_state
      ->getFormObject()
      ->getEntity()
      ->getEntityTypeId();

    // Add image validation.
    $element['#upload_validators']['file_validate_is_image'] = [];

    // Add upload resolution validation.
    if ($field_settings['max_resolution'] || $field_settings['min_resolution']) {
      $element['#upload_validators']['file_validate_image_resolution'] = [
        $field_settings['max_resolution'],
        $field_settings['min_resolution'],
      ];
    }
    $extensions = $field_settings['file_extensions'];
    $supported_extensions = $this->imageFactory
      ->getSupportedExtensions();

    // If using custom extension validation, ensure that the extensions are
    // supported by the current image toolkit. Otherwise, validate against all
    // toolkit supported extensions.
    $extensions = !empty($extensions) ? array_intersect(explode(' ', $extensions), $supported_extensions) : $supported_extensions;
    $element['#upload_validators']['file_validate_extensions'][0] = implode(' ', $extensions);

    // Add mobile device image capture acceptance.
    $element['#accept'] = 'image/*';

    // Add properties needed by process() method.
    $element['#preview_image_style'] = $this
      ->getSetting('preview_image_style');
    $element['#title_field'] = $field_settings['title_field'];
    $element['#title_field_required'] = $field_settings['title_field_required'];
    $element['#alt_field'] = $field_settings['alt_field'];
    $element['#alt_field_required'] = $field_settings['alt_field_required'];

    // Default image.
    $default_image = $field_settings['default_image'];
    if (empty($default_image['uuid'])) {
      $default_image = $this->fieldDefinition
        ->getFieldStorageDefinition()
        ->getSetting('default_image');
    }

    // Convert the stored UUID into a file ID.
    if (!empty($default_image['uuid']) && ($entity = \Drupal::entityManager()
      ->loadEntityByUuid('file', $default_image['uuid']))) {
      $default_image['fid'] = $entity
        ->id();
    }
    $element['#default_image'] = !empty($default_image['fid']) ? $default_image : [];
    if (!\Drupal::currentUser()
      ->isAnonymous()) {

      // Add token link to the form.
      $form['#token'] = TRUE;
      $moduleHandler = \Drupal::service('module_handler');
      if ($moduleHandler
        ->moduleExists('token')) {
        $form['token_tree'] = [
          '#theme' => 'token_tree_link',
          '#token_types' => [
            $entity_type_id,
          ],
          '#show_restricted' => TRUE,
          '#weight' => 90,
        ];
      }
    }
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public static function process($element, FormStateInterface $form_state, $form) {
    $item = $element['#value'];
    $item['fids'] = $element['fids']['#value'];
    $alt_token = '';
    $title_token = '';
    $element['#theme'] = 'image_widget';

    // Add the image preview.
    if (!empty($element['#files']) && $element['#preview_image_style']) {
      $file = reset($element['#files']);
      $variables = [
        'style_name' => $element['#preview_image_style'],
        'uri' => $file
          ->getFileUri(),
      ];

      // Determine image dimensions.
      if (isset($element['#value']['width']) && isset($element['#value']['height'])) {
        $variables['width'] = $element['#value']['width'];
        $variables['height'] = $element['#value']['height'];
      }
      else {
        $image = \Drupal::service('image.factory')
          ->get($file
          ->getFileUri());
        if ($image
          ->isValid()) {
          $variables['width'] = $image
            ->getWidth();
          $variables['height'] = $image
            ->getHeight();
        }
        else {
          $variables['width'] = $variables['height'] = NULL;
        }
      }
      $element['preview'] = [
        '#weight' => -10,
        '#theme' => 'image_style',
        '#width' => $variables['width'],
        '#height' => $variables['height'],
        '#style_name' => $variables['style_name'],
        '#uri' => $variables['uri'],
      ];

      // Store the dimensions in the form so the file doesn't have to be
      // accessed again. This is important for remote files.
      $element['width'] = [
        '#type' => 'hidden',
        '#value' => $variables['width'],
      ];
      $element['height'] = [
        '#type' => 'hidden',
        '#value' => $variables['height'],
      ];
    }
    elseif (!empty($element['#default_image'])) {
      $default_image = $element['#default_image'];
      $file = File::load($default_image['fid']);
      if (!empty($file)) {
        $element['preview'] = [
          '#weight' => -10,
          '#theme' => 'image_style',
          '#width' => $default_image['width'],
          '#height' => $default_image['height'],
          '#style_name' => $element['#preview_image_style'],
          '#uri' => $file
            ->getFileUri(),
        ];
      }
    }
    $entity = $form_state
      ->getFormObject()
      ->getEntity();
    $entity_type = $entity
      ->getEntityTypeId();
    if (isset($item['alt'])) {
      $alt_token = \Drupal::token()
        ->replace($item['alt'], [
        $entity_type => $entity,
      ]);
    }
    if (isset($item['title'])) {
      $title_token = \Drupal::token()
        ->replace($item['title'], [
        $entity_type => $entity,
      ]);
    }

    // Add the additional alt and title fields.
    $element['alt'] = [
      '#title' => t('Alternative text'),
      '#type' => 'textfield',
      '#default_value' => $alt_token ?? '',
      '#description' => t('This text will be used by screen readers, search engines, or when the image cannot be loaded.'),
      // @see https://www.drupal.org/node/465106#alt-text
      '#maxlength' => 512,
      '#weight' => -12,
      '#access' => (bool) $item['fids'] && $element['#alt_field'],
      '#required' => $element['#alt_field_required'],
      '#element_validate' => $element['#alt_field_required'] === 1 ? [
        [
          get_called_class(),
          'validateRequiredFields',
        ],
      ] : [],
    ];
    $element['title'] = [
      '#type' => 'textfield',
      '#title' => t('Title'),
      '#default_value' => $title_token ?? '',
      '#description' => t('The title is used as a tool tip when the user hovers the mouse over the image.'),
      '#maxlength' => 1024,
      '#weight' => -11,
      '#access' => (bool) $item['fids'] && $element['#title_field'],
      '#required' => $element['#title_field_required'],
      '#element_validate' => $element['#title_field_required'] === 1 ? [
        [
          get_called_class(),
          'validateRequiredFields',
        ],
      ] : [],
    ];
    $element['#value']['alt'] = $alt_token;
    $element['#value']['title'] = $title_token;
    return $element;
  }

}

Classes

Name	Description
ImageFieldTokensWigdet	Plugin implementation of the 'image_image' widget.