class CategorizedOptionsbuttonsWidget in Open Social 8.6

Plugin implementation of the 'categorized_options_buttons' widget.

TODO: Handle submit to add categories also as tags on user profile.

Plugin annotation

@FieldWidget(
  id = "categorized_options_buttons",
  label = @Translation("Categorized check boxes/radio buttons"),
  field_types = {
    "boolean",
    "entity_reference",
    "list_integer",
    "list_float",
    "list_string",
  },
  multiple_values = TRUE
)

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
    • class \Drupal\Core\Field\PluginSettingsBase implements DependentPluginInterface, PluginSettingsInterface
      • class \Drupal\Core\Field\WidgetBase implements WidgetInterface, ContainerFactoryPluginInterface uses AllowedTagsXssTrait
        • class \Drupal\Core\Field\Plugin\Field\FieldWidget\OptionsWidgetBase
          • class \Drupal\Core\Field\Plugin\Field\FieldWidget\OptionsButtonsWidget
            • class \Drupal\social_profile\Plugin\Field\FieldWidget\CategorizedOptionsbuttonsWidget

File

modules/social_features/social_profile/src/Plugin/Field/FieldWidget/CategorizedOptionsbuttonsWidget.php, line 27

Namespace

Drupal\social_profile\Plugin\Field\FieldWidget

class CategorizedOptionsbuttonsWidget extends OptionsButtonsWidget {

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

    // We can only overwrite the default behaviour if the user is allowed to
    // select multiple elements and we have something to choose from.
    // Otherwise we just default back to default behaviour.
    if ($this->multiple && !empty($element['#options'])) {
      $grouped_options = $this
        ->getGroupedOptions($element['#options'], $element['#default_value']);

      // Change the parent type.
      $element['#type'] = 'container';
      $element['#attributes']['class'][] = 'checkboxes--nested';
      unset($element['#options']);
      unset($element['#default_value']);

      // Used to ensure that we don't need to alter the submit handler too much.
      $element['#checkbox_categories'] = [];
      $field_name = $this->fieldDefinition
        ->getName();
      foreach ($grouped_options as $tid => $option) {

        // If this is a top level element without children then we just treat it
        // normally.
        if (empty($option['children'])) {
          $element += [
            'label' => [
              '#type' => 'label',
              '#title' => $element['#title'],
            ],
            'checkboxes' => [
              '#type' => 'checkboxes',
              '#default_value' => [],
              '#options' => [],
            ],
          ];
          $element['checkboxes']['#options'][$tid] = $option['label'];
          if ($option['selected']) {
            $element['checkboxes']['#default_value'][] = $tid;
          }
        }
        else {
          $children = $this
            ->getTaxonomyChildren($option);
          $element['#checkbox_categories'][] = $tid;
          $element[$tid] = [
            '#type' => 'container',
            'label' => [
              '#type' => 'label',
              '#title' => $option['label'],
              '#attributes' => [
                'class' => [
                  'checkboxes__label',
                ],
              ],
            ],
            'checkboxes' => [
              '#type' => 'checkboxes',
              '#default_value' => $children['selected'],
              '#options' => $children['children'],
            ],
          ];
        }
      }
    }
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public static function validateElement(array $element, FormStateInterface $form_state) {

    // Only pre-process the validation if this is a categorized checkbox
    // element.
    if (isset($element['#checkbox_categories'])) {

      // This turns the tree back into a single checkbox element that our parent
      // widget can handle. We didn't disable value tree submission because it
      // gives us issues in FormValidator::performRequiredValidation.
      $element['#value'] = [];
      $element['#options'] = [];
      if (isset($element['checkboxes'])) {
        $element['#value'] += $element['checkboxes']['#value'];
        $element['#options'] += $element['checkboxes']['#options'];
      }
      foreach ($element['#checkbox_categories'] as $tid) {

        // If a value in a category was checked then those selections are added
        // but we also select the category itself.
        if (!empty($element[$tid]['checkboxes']['#value'])) {
          $element['#value'] += [
            $tid => $tid,
          ];
          $element['#options'] += [
            $tid => $tid,
          ];
          $element['#value'] += $element[$tid]['checkboxes']['#value'];
          $element['#options'] += $element[$tid]['checkboxes']['#options'];
        }
      }
    }
    parent::validateElement($element, $form_state);
  }

  /**
   * Group the options with their parent taxonomy terms.
   *
   * This makes it easier to arrange them for display later. Relies on a proper
   * ordering of parent > child from the taxonomy validation.
   *
   * @param array $options
   *   The options to group.
   * @param array $selected
   *   The currently selected options.
   *
   * @return array
   *   A tree structure with labels and selection status as leaf values.
   */
  protected function getGroupedOptions(array $options, array $selected) {
    $grouped_options = [];
    foreach ($options as $tid => $label) {

      // Start at the top for the current element.
      $group =& $grouped_options;

      // Find the position for this element based on its parent group. If it
      // contains a dash (-) then it's a child and we find its parent.
      while (strpos($label, '-') === 0) {

        // Remove the dash denoting this is a child.
        $label = substr($label, 1);

        // Move into the last parent added.
        end($group);
        $group =& $group[key($group)]['children'];
      }

      // This is now a new child to the currently selected parent.
      $group[$tid] = [
        'label' => $label,
        'selected' => in_array($tid, $selected),
      ];
    }
    return $grouped_options;
  }

  /**
   * Reaches into all children and flattens the taxonomy.
   *
   * This method is private for a reason. We don't handle extra nesting yet but
   * could want to do this in the future. Do not rely on this method existing
   * in the future.
   *
   * @param array $parent
   *   The parent whose children to recurse through.
   * @param int $hyphens
   *   The number of hyphens to use as a label prefix.
   *
   * @return array[]
   *   A flattened array of children.
   */
  private function getTaxonomyChildren(array $parent, $hyphens = 0) {
    $children = [];
    $selected = [];
    foreach ($parent['children'] as $tid => $child) {
      $children[$tid] = str_repeat('-', $hyphens) . $child['label'];
      if ($child['selected']) {
        $selected[] = $tid;
      }
      if (!empty($child['children'])) {
        $result = $this
          ->getTaxonomyChildren($child, $hyphens + 1);
        $children += $result['children'];
        $selected += $result['selected'];
      }
    }
    return [
      'children' => $children,
      'selected' => $selected,
    ];
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AllowedTagsXssTrait::allowedTags	public	function	Returns a list of tags allowed by AllowedTagsXssTrait::fieldFilterXss().
AllowedTagsXssTrait::displayAllowedTags	public	function	Returns a human-readable list of allowed tags for display in help texts.
AllowedTagsXssTrait::fieldFilterXss	public	function	Filters an HTML string to prevent XSS vulnerabilities.
CategorizedOptionsbuttonsWidget::formElement	public	function	Returns the form for a single field widget. Overrides OptionsButtonsWidget::formElement
CategorizedOptionsbuttonsWidget::getGroupedOptions	protected	function	Group the options with their parent taxonomy terms.
CategorizedOptionsbuttonsWidget::getTaxonomyChildren	private	function	Reaches into all children and flattens the taxonomy.
CategorizedOptionsbuttonsWidget::validateElement	public static	function	Form validation handler for widget elements. Overrides OptionsWidgetBase::validateElement
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
OptionsButtonsWidget::getEmptyLabel	protected	function	Returns the empty option label to add to the list of options, if any. Overrides OptionsWidgetBase::getEmptyLabel
OptionsWidgetBase::$column	protected	property	Abstract over the actual field columns, to allow different field types to reuse those widgets.
OptionsWidgetBase::getOptions	protected	function	Returns the array of options for the widget.
OptionsWidgetBase::getSelectedOptions	protected	function	Determines selected options from the incoming field values.
OptionsWidgetBase::sanitizeLabel	protected	function	Sanitizes a string label to display as an option.	1
OptionsWidgetBase::supportsGroups	protected	function	Indicates whether the widgets support optgroups.	1
OptionsWidgetBase::__construct	public	function	Constructs a WidgetBase object. Overrides WidgetBase::__construct	1
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginSettingsBase::$defaultSettingsMerged	protected	property	Whether default settings have been merged into the current $settings.
PluginSettingsBase::$thirdPartySettings	protected	property	The plugin settings injected by third party modules.
PluginSettingsBase::calculateDependencies	public	function	Calculates dependencies for the configured plugin. Overrides DependentPluginInterface::calculateDependencies	6
PluginSettingsBase::defaultSettings	public static	function	Defines the default settings for this plugin. Overrides PluginSettingsInterface::defaultSettings	42
PluginSettingsBase::getSetting	public	function	Returns the value of a setting, or its default value if absent. Overrides PluginSettingsInterface::getSetting
PluginSettingsBase::getSettings	public	function	Returns the array of settings, including defaults for missing settings. Overrides PluginSettingsInterface::getSettings
PluginSettingsBase::getThirdPartyProviders	public	function	Gets the list of third parties that store information. Overrides ThirdPartySettingsInterface::getThirdPartyProviders
PluginSettingsBase::getThirdPartySetting	public	function	Gets the value of a third-party setting. Overrides ThirdPartySettingsInterface::getThirdPartySetting
PluginSettingsBase::getThirdPartySettings	public	function	Gets all third-party settings of a given module. Overrides ThirdPartySettingsInterface::getThirdPartySettings
PluginSettingsBase::mergeDefaults	protected	function	Merges default settings values into $settings.
PluginSettingsBase::onDependencyRemoval	public	function	Informs the plugin that some configuration it depends on will be deleted. Overrides PluginSettingsInterface::onDependencyRemoval	3
PluginSettingsBase::setSetting	public	function	Sets the value of a setting for the plugin. Overrides PluginSettingsInterface::setSetting
PluginSettingsBase::setSettings	public	function	Sets the settings for the plugin. Overrides PluginSettingsInterface::setSettings
PluginSettingsBase::setThirdPartySetting	public	function	Sets the value of a third-party setting. Overrides ThirdPartySettingsInterface::setThirdPartySetting
PluginSettingsBase::unsetThirdPartySetting	public	function	Unsets a third-party setting. Overrides ThirdPartySettingsInterface::unsetThirdPartySetting
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
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.
WidgetBase::$fieldDefinition	protected	property	The field definition.
WidgetBase::$settings	protected	property	The widget settings. Overrides PluginSettingsBase::$settings
WidgetBase::addMoreAjax	public static	function	Ajax callback for the "Add another item" button.
WidgetBase::addMoreSubmit	public static	function	Submission handler for the "Add another item" button.
WidgetBase::afterBuild	public static	function	After-build handler for field elements in a form.
WidgetBase::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create	5
WidgetBase::errorElement	public	function	Assigns a field-level validation error to the right widget sub-element. Overrides WidgetInterface::errorElement	8
WidgetBase::extractFormValues	public	function	Extracts field values from submitted form values. Overrides WidgetBaseInterface::extractFormValues	2
WidgetBase::flagErrors	public	function	Reports field-level validation errors against actual form elements. Overrides WidgetBaseInterface::flagErrors	2
WidgetBase::form	public	function	Creates a form element for a field. Overrides WidgetBaseInterface::form	3
WidgetBase::formMultipleElements	protected	function	Special handling to create form elements for multiple values.	1
WidgetBase::formSingleElement	protected	function	Generates the form element for a single copy of the widget.
WidgetBase::getFieldSetting	protected	function	Returns the value of a field setting.
WidgetBase::getFieldSettings	protected	function	Returns the array of field settings.
WidgetBase::getFilteredDescription	protected	function	Returns the filtered field description.
WidgetBase::getWidgetState	public static	function	Retrieves processing information about the widget from $form_state. Overrides WidgetBaseInterface::getWidgetState
WidgetBase::getWidgetStateParents	protected static	function	Returns the location of processing information within $form_state.
WidgetBase::handlesMultipleValues	protected	function	Returns whether the widget handles multiple values.
WidgetBase::isApplicable	public static	function	Returns if the widget can be used for the provided field. Overrides WidgetInterface::isApplicable	4
WidgetBase::isDefaultValueWidget	protected	function	Returns whether the widget used for default value form.
WidgetBase::massageFormValues	public	function	Massages the form values into the format expected for field values. Overrides WidgetInterface::massageFormValues	7
WidgetBase::settingsForm	public	function	Returns a form to configure settings for the widget. Overrides WidgetInterface::settingsForm	16
WidgetBase::settingsSummary	public	function	Returns a short summary for the current widget settings. Overrides WidgetInterface::settingsSummary	15
WidgetBase::setWidgetState	public static	function	Stores processing information about the widget in $form_state. Overrides WidgetBaseInterface::setWidgetState