improvements-2.x-dev/src/Plugin/Field/FieldFormatter/TextExtendedFormatter.php

<?php

namespace Drupal\improvements\Plugin\Field\FieldFormatter;

use Drupal\Component\Utility\Unicode;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\FormatterBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Render\Markup;

/**
 * @FieldFormatter(
 *   id = "text_extended",
 *   label = @Translation("Extended text formatter"),
 *   field_types = {
 *     "text",
 *     "text_long",
 *     "text_with_summary",
 *     "string",
 *   },
 * )
 */
class TextExtendedFormatter extends FormatterBase {

  /**
   * {@inheritdoc}
   */
  public static function defaultSettings(): array {
    return [
      'text_source' => 'value',
      'strip_tags' => FALSE,
      'replace_tokens' => FALSE,
      'trim_length' => 0,
      'trim_summary' => FALSE,
      'trim_wordsafe' => FALSE,
      'trim_ellipsis' => '…',
      'link_to_entity' => FALSE,
    ] + parent::defaultSettings();
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, FormStateInterface $form_state): array {
    $field_name = $this->fieldDefinition->getName();

    if ($this->fieldDefinition->getType() == 'text_with_summary') {
      $elements['text_source'] = [
        '#title' => t('Text source'),
        '#type' => 'radios',
        '#options' => [
          'value' => t('Value'),
          'text' => t('Formatted text'),
          'summary' => t('Formatted summary'),
          'summary_or_text' => t('Formatted summary or text'),
        ],
        '#default_value' => $this->getSetting('text_source'),
      ];
    }

    $elements['strip_tags'] = [
      '#title' => t('Strip tags'),
      '#type' => 'checkbox',
      '#default_value' => $this->getSetting('strip_tags'),
    ];

    $elements['replace_tokens'] = [
      '#title' => t('Replace tokens'),
      '#type' => 'checkbox',
      '#default_value' => $this->getSetting('replace_tokens'),
    ];

    $elements['truncate'] = [
      '#title' => t('Truncate'),
      '#type' => 'checkbox',
      '#default_value' => ($this->getSetting('trim_length') > 0),
    ];

    $elements['trim_length'] = [
      '#title' => t('Trim length'),
      '#type' => 'number',
      '#default_value' => $this->getSetting('trim_length'),
      '#min' => 0,
      '#required' => TRUE,
      '#states' => [
        'visible' => [
          ':input[name="fields[' . $field_name . '][settings_edit_form][settings][truncate]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
    ];

    if ($this->fieldDefinition->getType() == 'text_with_summary') {
      $elements['trim_summary'] = [
        '#title' => t('Trim summary'),
        '#type' => 'checkbox',
        '#default_value' => $this->getSetting('trim_summary'),
        '#states' => [
          'visible' => [
            ':input[name="fields[' . $field_name . '][settings_edit_form][settings][truncate]"]' => [
              'checked' => TRUE,
            ],
          ],
        ],
      ];
    }

    $elements['trim_wordsafe'] = [
      '#title' => t('Trim with word safe'),
      '#type' => 'checkbox',
      '#default_value' => $this->getSetting('trim_wordsafe'),
      '#states' => [
        'visible' => [
          ':input[name="fields[' . $field_name . '][settings_edit_form][settings][truncate]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
    ];

    $elements['trim_ellipsis'] = [
      '#title' => t('Trim ellipsis'),
      '#type' => 'textfield',
      '#default_value' => $this->getSetting('trim_ellipsis'),
      '#states' => [
        'visible' => [
          ':input[name="fields[' . $field_name . '][settings_edit_form][settings][truncate]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
    ];

    $elements['link_to_entity'] = [
      '#title' => t('Link to entity'),
      '#type' => 'checkbox',
      '#default_value' => $this->getSetting('link_to_entity'),
    ];

    return $elements;
  }

  /**
   * {@inheritdoc}
   */
  public function viewElements(FieldItemListInterface $items, $langcode): array {
    $elements = [];

    foreach ($items as $delta => $item) {
      $elements[$delta] = $this->viewElement($item);
    }

    return $elements;
  }

  /**
   *
   */
  public function viewElement($item): array {
    $settings = $this->getSettings();
    $entity = $item->getEntity();

    // Text source
    if ($settings['text_source'] == 'text') {
      $text = check_markup($item->value, $item->format);
    }
    elseif ($settings['text_source'] == 'summary') {
      $text = check_markup($item->summary, $item->format);
    }
    elseif ($settings['text_source'] == 'summary_or_text') {
      $text = check_markup($item->summary ?: $item->value, $item->format);
    }
    else {
      $text = $item->value;
    }

    // Strip tags
    if ($settings['strip_tags']) {
      $text = strip_tags($text);
    }

    // Replace tokens
    if ($settings['replace_tokens']) {
      $text = \Drupal::token()->replace($text, [$entity->getEntityTypeId() => $entity]);
    }

    // Trim
    if ($settings['trim_length']) {
      $text = trim($text);
      $text_length = mb_strlen($text);
      $text = Unicode::truncate($text, $settings['trim_length'], $settings['trim_wordsafe']);

      if ($settings['trim_ellipsis'] && $text_length > mb_strlen($text)) {
        $text = rtrim($text, ',.-()\\/*@#');
        $text .= $settings['trim_ellipsis'];
      }
    }

    // Link to entity
    if ($settings['link_to_entity']) {
      $element = [
        '#type' => 'link',
        '#title' => Markup::create($text),
        '#url' => $entity->toUrl(),
      ];
    }
    else {
      $element = [
        '#markup' => $text,
      ];
    }

    return $element;
  }

}