class WebformRating extends Range {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $class = get_class($this);
    return [
      '#min' => 0,
      '#max' => 5,
      '#step' => 1,
      '#star_size' => 'medium',
      '#reset' => FALSE,
      '#process' => [
        [
          $class,
          'processWebformRating',
        ],
      ],
      '#pre_render' => [
        [
          $class,
          'preRenderWebformRating',
        ],
      ],
      '#theme' => 'input__webform_rating',
    ] + parent::getInfo();
  }

  /**
   * Expand rating elements.
   */
  public static function processWebformRating(&$element, FormStateInterface $form_state, &$complete_form) {

    // Add validate callback.
    $element['#element_validate'] = [
      [
        get_called_class(),
        'validateWebformRating',
      ],
    ];
    return $element;
  }

  /**
   * Prepares a #type 'webform_rating' render element for input.html.twig.
   *
   * @param array $element
   *   An associative array containing the properties of the element.
   *   Properties used: #title, #value, #description, #min, #max, #attributes,
   *   #step.
   *
   * @return array
   *   The $element with prepared variables ready for input.html.twig.
   */
  public static function preRenderWebformRating(array $element) {
    $element['#attributes']['type'] = 'range';
    $element['#attributes']['class'][] = 'js-webform-visually-hidden';
    Element::setAttributes($element, [
      'id',
      'name',
      'value',
      'step',
      'min',
      'max',
    ]);
    static::setAttributes($element, [
      'form-webform-rating',
    ]);

    // If value is an empty string set it the min.
    if (isset($element['#attributes']['value']) && $element['#attributes']['value'] === '') {
      $element['#attributes']['value'] = $element['#attributes']['min'];
    }
    $element['#children']['rateit'] = static::buildRateIt($element);
    return $element;
  }

  /**
   * Build RateIt div.
   *
   * @param array $element
   *   A rating element.
   *
   * @return array
   *   A renderable array containing the RateIt div tag.
   *
   * @see https://github.com/gjunge/rateit.js/wiki
   */
  public static function buildRateIt(array $element) {

    // Add default properties since this element does not have to be a render
    // element.
    // @see \Drupal\webform\Plugin\WebformElement\WebformRating::formatHtml
    $element += [
      '#min' => 0,
      '#max' => 5,
      '#step' => 1,
      '#star_size' => 'medium',
      '#reset' => FALSE,
    ];
    $is_readonly = !empty($element['#readonly']) || !empty($element['#attributes']['readonly']);
    $attributes = [
      'class' => [
        'rateit',
        'svg',
      ],
      'data-rateit-min' => $element['#min'],
      'data-rateit-max' => $element['#max'],
      'data-rateit-step' => $element['#step'],
      'data-rateit-resetable' => !$is_readonly && $element['#reset'] ? 'true' : 'false',
      'data-rateit-readonly' => $is_readonly ? 'true' : 'false',
    ];

    // Set range element's selector based on its parents.
    if (isset($element['#attributes']['data-drupal-selector'])) {
      $attributes['data-rateit-backingfld'] = '[data-drupal-selector="' . $element['#attributes']['data-drupal-selector'] . '"]';
    }

    // Set value for HTML preview.
    // @see \Drupal\webform\Plugin\WebformElement\WebformRating::formatHtml
    if (isset($element['#value'])) {
      $attributes['data-rateit-value'] = $element['#value'];
    }
    if (isset($element['#starwidth']) && isset($element['#starheight'])) {
      $attributes['data-rateit-starwidth'] = $element['#starwidth'];
      $attributes['data-rateit-starheight'] = $element['#starheight'];
    }
    else {

      // Set star width and height using the #star_size.
      $sizes = [
        'large' => 32,
        'medium' => 24,
        'small' => 16,
      ];
      $size = isset($sizes[$element['#star_size']]) ? $element['#star_size'] : 'small';
      $attributes['data-rateit-starwidth'] = $attributes['data-rateit-starheight'] = $sizes[$size];
      $attributes['class'][] = 'rateit-' . $size;
    }
    return [
      '#type' => 'html_tag',
      '#tag' => 'div',
      '#attributes' => $attributes,
      '#attached' => [
        'library' => [
          'webform/webform.element.rating',
        ],
      ],
    ];
  }

  /**
   * Validates a rating element.
   */
  public static function validateWebformRating(&$element, FormStateInterface $form_state, &$complete_form) {
    $value = $element['#value'];
    if (Element::isVisibleElement($element) && !empty($element['#required']) && ($value === '0' || $value === '')) {
      WebformElementHelper::setRequiredError($element, $form_state);
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property
DependencySerializationTrait::$_serviceIds	protected	property
DependencySerializationTrait::__sleep	public	function		2
DependencySerializationTrait::__wakeup	public	function		2
FormElement::processAutocomplete	public static	function	Adds autocomplete functionality to elements.
FormElement::processPattern	public static	function	#process callback for #pattern form element property.
FormElement::validatePattern	public static	function	#element_validate callback for #pattern form element property.
MessengerTrait::$messenger	protected	property	The messenger.	27
MessengerTrait::messenger	public	function	Gets the messenger.	27
MessengerTrait::setMessenger	public	function	Sets the messenger.
Number::preRenderNumber	public static	function	Prepares a #type 'number' render element for input.html.twig.
Number::validateNumber	public static	function	Form element validation handler for #type 'number'.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	2
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::__construct	public	function	Constructs a \Drupal\Component\Plugin\PluginBase object.	98
Range::preRenderRange	public static	function	Prepares a #type 'range' render element for input.html.twig.
Range::valueCallback	public static	function	Determines how user input is mapped to an element's #value property. Overrides FormElement::valueCallback
RenderElement::preRenderAjaxForm	public static	function	Adds Ajax information about an element to communicate with JavaScript.
RenderElement::preRenderGroup	public static	function	Adds members of this group as actual elements for rendering.
RenderElement::processAjaxForm	public static	function	Form element processing handler for the #ajax form property.	1
RenderElement::processGroup	public static	function	Arranges elements into groups.
RenderElement::setAttributes	public static	function	Sets a form element's class attribute. Overrides ElementInterface::setAttributes
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	4
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.
WebformRating::buildRateIt	public static	function	Build RateIt div.
WebformRating::getInfo	public	function	Returns the element properties for this element. Overrides Range::getInfo
WebformRating::preRenderWebformRating	public static	function	Prepares a #type 'webform_rating' render element for input.html.twig.
WebformRating::processWebformRating	public static	function	Expand rating elements.
WebformRating::validateWebformRating	public static	function	Validates a rating element.

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class WebformRating in Webform 6.x

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