Implement CodeSniffer suggestions.

name: AutoFloat

type: module

description: A text format filter that adds odd/even classes to images to make them float alternately left and right.

version: VERSION

core: 8.x

configure: autofloat.settings

<?php

/**

 * @file

 * Install, update and uninstall functions.

  $url = Url::fromRoute('filter.admin_overview');

  $formats_link = \Drupal::l(t('Configuration > Content authoring > Text formats'), $url);

  $text = t('Add the AutoFloat filter to a text format under @formats_link. Move it below other image related filters in the filter processing order.', array(

  $text = t('Add the AutoFloat filter to a text format under @formats_link. Move it below other image related filters in the filter processing order.', [

    '@formats_link' => $formats_link,

  ));

  ]);

  drupal_set_message($text);

}

<?php

/**

 * @file

 * Autofloat module: A filter that floats images left and right automatically.

/**

 * Wrap images in a selector with odd/even classes automatically.

 */

function _autofloat_filter($text, $filter) {

function _autofloat_filter($text) {

  $target = \Drupal::config('autofloat.settings')->get('target');

  $selector = \Drupal::config('autofloat.settings')->get('selector');

  // Divide the variable into two selectors if a comma is found.

use Drupal\Core\Form\ConfigFormBase;

use Drupal\Core\Form\FormStateInterface;

/**

 * Class AutofloatSettingsForm.

 */

class AutofloatSettingsForm extends ConfigFormBase {

  /**

   * {@inheritdoc}

   */

  public function getFormID() {

  public function getFormId() {

    return 'autofloat_settings';

  }

   * {@inheritdoc}

   */

  protected function getEditableConfigNames() {

    return ['autofloat.settings',];

    return ['autofloat.settings'];

  }

  /**

  public function buildForm(array $form, FormStateInterface $form_state) {

    $config = $this->configFactory->get('autofloat.settings');

    $form['autofloat_start'] = array(

    $form['autofloat_start'] = [

      '#type' => 'radios',

      '#title' => t('Start with the first image on the..'),

      '#options' => array(

        0 => t('right'),

        1 => t('left (swaps "odd" and "even" classes)'),

      ),

      '#title' => $this->t('Start with the first image on the..'),

      '#options' => [

        0 => $this->t('right'),

        1 => $this->t('left (swaps "odd" and "even" classes)'),

      ],

      '#default_value' => $config->get('start'),

      '#description' => t('Clear the site cache to apply changes.'),

    );

    $form['autofloat_css'] = array(

      '#description' => $this->t('Clear the site cache to apply changes.'),

    ];

    $form['autofloat_css'] = [

      '#type' => 'checkbox',

      '#title' => t('Use autofloat.css'),

      '#title' => $this->t('Use autofloat.css'),

      '#default_value' => $config->get('css'),

      '#description' => t('Uncheck to take care of the floating and margins yourself in custom css.'),

    );

    $form['target_settings'] = array(

      '#description' => $this->t('Uncheck to take care of the floating and margins yourself in custom css.'),

    ];

    $form['target_settings'] = [

      '#type' => 'fieldset',

      '#title' => t('Selector/rejector settings'),

      '#description' => t('Images will float unless they have the class "nofloat". Clear the site cache to apply changes. Avoid adding classes manually by defining classes here added by other modules/filters. Use your browser inspector to find them.'),

    );

    $form['target_settings']['autofloat_target'] = array(

      '#title' => $this->t('Selector/rejector settings'),

      '#description' => $this->t('Images will float unless they have the class "nofloat". Clear the site cache to apply changes. Avoid adding classes manually by defining classes here added by other modules/filters. Use your browser inspector to find them.'),

    ];

    $form['target_settings']['autofloat_target'] = [

      '#type' => 'radios',

      '#title' => t('Elements to target'),

      '#options' => array(

        'div' => t('div'),

        'span' => t('span'),

      ),

      '#title' => $this->t('Elements to target'),

      '#options' => [

        'div' => $this->t('div'),

        'span' => $this->t('span'),

      ],

      '#default_value' => $config->get('target'),

      '#description' => t('Clear the site cache to apply changes.'),

    );

    $form['target_settings']['autofloat_selector'] = array(

      '#description' => $this->t('Clear the site cache to apply changes.'),

    ];

    $form['target_settings']['autofloat_selector'] = [

      '#type' => 'textfield',

      '#title' => t('Additional selector classes to float'),

      '#title' => $this->t('Additional selector classes to float'),

      '#default_value' => $config->get('selector'),

      '#description' => t('A "selector" with the class "float" will float all containing content, e.g. the image with a caption under it. Optionally define others. Maximum two, divided by a comma. Example: "caption".'),

    );

    $form['target_settings']['autofloat_rejector'] = array(

      '#description' => $this->t('A "selector" with the class "float" will float all containing content, e.g. the image with a caption under it. Optionally define others. Maximum two, divided by a comma. Example: "caption".'),

    ];

    $form['target_settings']['autofloat_rejector'] = [

      '#type' => 'textfield',

      '#title' => t('Additional div classes to ignore'),

      '#title' => $this->t('Additional div classes to ignore'),

      '#default_value' => $config->get('rejector'),

      '#description' => t('Images nested within any element with the class "nofloat" will NOT float, e.g. a set of thumbnails. Optionally define others. Maximum two, divided by a comma. Example: "flickr-photoset".'),

    );

      '#description' => $this->t('Images nested within any element with the class "nofloat" will NOT float, e.g. a set of thumbnails. Optionally define others. Maximum two, divided by a comma. Example: "flickr-photoset".'),

    ];

    return parent::buildForm($form, $form_state);

  }

<?php

/**

 * @file

 * Contains \Drupal\autofloat\Plugin\Filter\AutoFloat.

 */

namespace Drupal\autofloat\Plugin\Filter;

use Drupal\Core\Form\FormStateInterface;

    $url = Url::fromRoute('autofloat.settings');

    $config_link = \Drupal::l(t('AutoFloat Filter Settings'), $url);

  $form['notice'] = array(

    '#markup' => t('@config_link are shared by all the text formats where it is enabled.', array(

    $form['notice'] = [

      '#markup' => t('@config_link are shared by all the text formats where it is enabled.', [

        '@config_link' => $config_link,

    )),

  );

      ]),

    ];

    return $form;

  }

   * {@inheritdoc}

   */

  public function process($text, $langcode) {

    return new FilterProcessResult(_autofloat_filter($text, $settings));

    return new FilterProcessResult(_autofloat_filter($text));

  }

  /**