trait LeafletSettingsElementsTrait in Leaflet 8

trait LeafletSettingsElementsTrait {

  /**
   * Leaflet Controls Positions Options.
   *
   * @var array
   */
  protected $controlPositionsOptions = [
    'topleft' => 'Top Left',
    'topright' => 'Top Right',
    'bottomleft' => 'Bottom Left',
    'bottomright' => 'Bottom Right',
  ];

  /**
   * Leaflet Circle Radius Marker Field Types Options.
   *
   * @var array
   */
  protected $leafletCircleRadiusFieldTypesOptions = [
    'integer',
    'float',
    'decimal',
  ];

  /**
   * The Link generator Service.
   *
   * @var \Drupal\Core\Utility\LinkGeneratorInterface $this->link
   */

  /**
   * Get the Default Settings.
   *
   * @return array
   *   The default settings.
   */
  public static function getDefaultSettings() {
    return [
      'multiple_map' => 0,
      'leaflet_map' => 'OSM Mapnik',
      'height' => 400,
      'height_unit' => 'px',
      'hide_empty_map' => 0,
      'disable_wheel' => 0,
      'fullscreen_control' => 1,
      'gesture_handling' => 0,
      'reset_map' => [
        'control' => 0,
        'position' => 'topright',
      ],
      'popup' => FALSE,
      'popup_content' => '',
      'map_position' => [
        'force' => 0,
        'center' => [
          'lat' => 0,
          'lon' => 0,
        ],
        'zoom' => 12,
        'minZoom' => 1,
        'maxZoom' => 18,
        'zoomFiner' => 0,
      ],
      'icon' => [
        'iconType' => 'marker',
        'iconUrl' => '',
        'iconSize' => [
          'x' => NULL,
          'y' => NULL,
        ],
        'iconAnchor' => [
          'x' => NULL,
          'y' => NULL,
        ],
        'shadowUrl' => '',
        'shadowSize' => [
          'x' => NULL,
          'y' => NULL,
        ],
        'shadowAnchor' => [
          'x' => NULL,
          'y' => NULL,
        ],
        'popupAnchor' => [
          'x' => NULL,
          'y' => NULL,
        ],
        'html' => '<div></div>',
        'html_class' => 'leaflet-map-divicon',
        'circle_marker_options' => '{"radius": 100, "color": "red", "fillColor": "#f03", "fillOpacity": 0.5}',
      ],
      'leaflet_markercluster' => [
        'control' => 0,
        'options' => '{"spiderfyOnMaxZoom":true,"showCoverageOnHover":true,"removeOutsideVisibleBounds": false}',
      ],
      'path' => '{"color":"#3388ff","opacity":"1.0","stroke":true,"weight":3,"fill":"depends","fillColor":"*","fillOpacity":"0.2"}',
      'geocoder' => [
        'control' => 0,
        'settings' => [
          'position' => 'topright',
          'input_size' => 25,
          'providers' => [],
          'min_terms' => 4,
          'delay' => 800,
          'zoom' => 16,
          'popup' => 0,
          'options' => '',
        ],
      ],
    ];
  }

  /**
   * Generate the Leaflet Map General Settings.
   *
   * @param array $elements
   *   The form elements.
   * @param array $settings
   *   The settings.
   */
  protected function generateMapGeneralSettings(array &$elements, array $settings) {
    $leaflet_map_options = [];
    foreach (leaflet_map_get_info() as $key => $map) {
      $leaflet_map_options[$key] = $map['label'];
    }
    $leaflet_map = isset($settings['leaflet_map']) ? $settings['leaflet_map'] : $settings['map'];
    $elements['leaflet_map'] = [
      '#title' => $this
        ->t('Leaflet Map'),
      '#type' => 'select',
      '#options' => $leaflet_map_options,
      '#default_value' => $leaflet_map,
      '#required' => TRUE,
    ];
    $elements['height'] = [
      '#title' => $this
        ->t('Map Height'),
      '#type' => 'number',
      '#default_value' => $settings['height'],
      '#description' => $this
        ->t('Note: This can be left empty to make the Map fill its parent container height.'),
    ];
    $elements['height_unit'] = [
      '#title' => t('Map height unit'),
      '#type' => 'select',
      '#options' => [
        'px' => t('px'),
        '%' => t('%'),
      ],
      '#default_value' => $settings['height_unit'],
      '#description' => t("Whether height is absolute (pixels) or relative (percent).<br><strong>Note:</strong> In case of Percent the Leaflet Map should be wrapped in a container element with defined Height, otherwise won't show up."),
    ];
    $elements['hide_empty_map'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Hide Map if empty'),
      '#description' => $this
        ->t('Check this option not to render the Map at all, if empty (no output results).'),
      '#default_value' => $settings['hide_empty_map'],
      '#return_value' => 1,
      '#states' => [
        'invisible' => [
          ':input[name="fields[field_geofield][settings_edit_form][settings][multiple_map]"]' => [
            'checked' => TRUE,
          ],
        ],
      ],
    ];
    $elements['disable_wheel'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Disable zoom using mouse wheel'),
      '#description' => $this
        ->t("If enabled, the mouse wheel won't change the zoom level of the map."),
      '#default_value' => $settings['disable_wheel'],
      '#return_value' => 1,
    ];
    $elements['fullscreen_control'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Fullscreen Control'),
      '#description' => $this
        ->t('Enable the Fullscreen View of the Map.'),
      '#default_value' => $settings['fullscreen_control'],
      '#return_value' => 1,
    ];
    $elements['gesture_handling'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Gesture Handling'),
      '#description' => $this
        ->t('Enable the @gesture_handling_link functionality for the Map.', [
        '@gesture_handling_link' => $this->link
          ->generate($this
          ->t('Leaflet Gesture Handling Library'), Url::fromUri('https://github.com/elmarquis/Leaflet.GestureHandling', [
          'absolute' => TRUE,
          'attributes' => [
            'target' => 'blank',
          ],
        ])),
      ]),
      '#default_value' => $settings['gesture_handling'],
      '#return_value' => 1,
    ];
  }

  /**
   * Generate the Leaflet Map Position Form Element.
   *
   * @param array $map_position_options
   *   The map position options array definition.
   *
   * @return array
   *   The Leaflet Map Position Form Element.
   */
  protected function generateMapPositionElement(array $map_position_options) {
    $element = [
      '#type' => 'fieldset',
      '#title' => $this
        ->t('Starting Map State'),
    ];
    if (isset($this->fieldDefinition)) {
      $force_checkbox_selector = ':input[name="fields[' . $this->fieldDefinition
        ->getName() . '][settings_edit_form][settings][map_position][force]"]';
      $force_checkbox_selector_widget = ':input[name="fields[' . $this->fieldDefinition
        ->getName() . '][settings_edit_form][settings][map][map_position][force]"]';
    }
    elseif ($this instanceof ViewsPluginInterface) {
      $force_checkbox_selector = ':input[name="style_options[map_position][force]"]';
    }
    $element['description'] = [
      '#type' => 'container',
      'html_tag' => [
        '#type' => 'html_tag',
        '#tag' => 'div',
        '#value' => $this
          ->t('These settings will be applied in case of single Marker Map (otherwise the Zoom will be set to Fit Elements bounds).'),
      ],
      '#states' => [
        'invisible' => [
          [
            $force_checkbox_selector => [
              'checked' => TRUE,
            ],
          ],
          'or',
          [
            $force_checkbox_selector_widget => [
              'checked' => TRUE,
            ],
          ],
        ],
      ],
    ];
    $element['force'] = [
      '#type' => 'checkbox',
      '#description' => $this
        ->t('These settings will be forced anyway as starting Map state.'),
      '#default_value' => $map_position_options['force'],
      '#return_value' => 1,
    ];
    $element['#title'] = $this
      ->t('Custom Map Center & Zoom');
    $element['description']['#value'] = $this
      ->t('These settings will be applied in case of empty Map.');
    $element['force']['#title'] = $this
      ->t('Force Map Center & Zoom');
    $element['center'] = [
      '#type' => 'fieldset',
      '#title' => $this
        ->t('Map Center'),
      'lat' => [
        '#title' => $this
          ->t('Latitude'),
        '#type' => 'number',
        '#step' => 'any',
        '#size' => 4,
        '#default_value' => $map_position_options['center']['lat'] ?? $this
          ->getDefaultSettings()['map_position']['center']['lat'],
        '#required' => FALSE,
      ],
      'lon' => [
        '#title' => $this
          ->t('Longitude'),
        '#type' => 'number',
        '#step' => 'any',
        '#size' => 4,
        '#default_value' => $map_position_options['center']['lon'] ?? $this
          ->getDefaultSettings()['map_position']['center']['lon'],
        '#required' => FALSE,
      ],
    ];
    $element['zoom'] = [
      '#title' => $this
        ->t('Zoom'),
      '#type' => 'number',
      '#min' => 0,
      '#max' => 22,
      '#default_value' => $map_position_options['zoom'] ?? $this
        ->getDefaultSettings()['map_position']['zoom'],
      '#required' => TRUE,
      '#element_validate' => [
        [
          get_class($this),
          'zoomLevelValidate',
        ],
      ],
    ];
    if ($this instanceof ViewsPluginInterface) {
      $element['zoom']['#description'] = $this
        ->t('These setting will be applied (anyway) to a single Marker Map.');
    }
    $element['minZoom'] = [
      '#title' => $this
        ->t('Min. Zoom'),
      '#type' => 'number',
      '#min' => 0,
      '#max' => 22,
      '#default_value' => $map_position_options['minZoom'] ?? $this
        ->getDefaultSettings()['map_position']['minZoom'],
      '#required' => TRUE,
    ];
    $element['maxZoom'] = [
      '#title' => $this
        ->t('Max. Zoom'),
      '#type' => 'number',
      '#min' => 1,
      '#max' => 22,
      '#default_value' => $map_position_options['maxZoom'] ?? $this
        ->getDefaultSettings()['map_position']['maxZoom'],
      '#element_validate' => [
        [
          get_class($this),
          'maxZoomLevelValidate',
        ],
      ],
      '#required' => TRUE,
    ];
    $element['zoomFiner'] = [
      '#title' => $this
        ->t('Zoom Finer'),
      '#type' => 'number',
      '#max' => 5,
      '#min' => -5,
      '#step' => 1,
      '#description' => $this
        ->t('Value that might/will be added to default Fit Elements Bounds Zoom. (-5 / +5)'),
      '#default_value' => $map_position_options['zoomFiner'] ?? $this
        ->getDefaultSettings()['map_position']['zoomFiner'],
      '#states' => [
        'invisible' => [
          [
            $force_checkbox_selector => [
              'checked' => TRUE,
            ],
          ],
          'or',
          [
            $force_checkbox_selector_widget => [
              'checked' => TRUE,
            ],
          ],
        ],
      ],
    ];
    return $element;
  }

  /**
   * Generate the Leaflet Icon Form Element.
   *
   * @param array $icon_options
   *   The icon array definition.
   *
   * @return array
   *   The Leaflet Icon Form Element.
   */
  protected function generateIconFormElement(array $icon_options) {
    $default_settings = $this::getDefaultSettings();
    $token_replacement_disclaimer = $this
      ->t('<b>Note: </b> Using <strong>Replacement Patterns</strong> it is possible to dynamically define the Marker Icon output, with the composition of Marker Icon paths including entity properties or fields values.');
    $icon_url_description = $this
      ->t('Can be an absolute or relative URL. <b>If left empty the default Leaflet Marker will be used.</b><br>@token_replacement_disclaimer', [
      '@token_replacement_disclaimer' => $token_replacement_disclaimer,
    ]);
    if (isset($this->fieldDefinition)) {
      $icon_type = ':input[name="fields[' . $this->fieldDefinition
        ->getName() . '][settings_edit_form][settings][icon][iconType]"]';
    }
    else {
      $icon_type = ':input[name="style_options[icon][iconType]"]';
    }
    $element = [
      '#type' => 'fieldset',
      '#title' => $this
        ->t('Map Icon'),
      'description' => [
        '#markup' => $this
          ->t('For details on the following setup refer to @leaflet_icon_documentation_link', [
          '@leaflet_icon_documentation_link' => $this->leafletService
            ->leafletIconDocumentationLink(),
        ]),
      ],
    ];
    $element['iconType'] = [
      '#type' => 'radios',
      '#title' => t('Icon Source'),
      '#default_value' => isset($icon_options['iconType']) ? $icon_options['iconType'] : $default_settings['icon']['iconType'],
      '#options' => [
        'marker' => 'Icon Image Url/Path',
        'html' => 'Field (html DivIcon)',
        'circle_marker' => $this
          ->t('Circle Marker (@more_info)', [
          '@more_info' => $this->link
            ->generate('more info', Url::fromUri('https://leafletjs.com/reference-1.6.0.html#circlemarker', [
            'absolute' => TRUE,
            'attributes' => [
              'target' => 'blank',
            ],
          ])),
        ]),
      ],
    ];
    $element['iconUrl'] = [
      '#title' => $this
        ->t('Icon URL'),
      '#description' => $icon_url_description,
      '#type' => 'textarea',
      '#rows' => 3,
      '#default_value' => isset($icon_options['iconUrl']) ? $icon_options['iconUrl'] : $default_settings['icon']['iconUrl'],
      '#states' => [
        'visible' => [
          $icon_type => [
            'value' => 'marker',
          ],
        ],
      ],
    ];
    $element['shadowUrl'] = [
      '#title' => $this
        ->t('Icon Shadow URL'),
      '#description' => $icon_url_description,
      '#type' => 'textarea',
      '#rows' => 3,
      '#default_value' => isset($icon_options['shadowUrl']) ? $icon_options['shadowUrl'] : $default_settings['icon']['shadowUrl'],
      '#states' => [
        'visible' => [
          $icon_type => [
            'value' => 'marker',
          ],
        ],
      ],
    ];
    $element['html'] = [
      '#title' => $this
        ->t('Html'),
      '#type' => 'textarea',
      '#description' => $this
        ->t('Insert here the Html code that will be used as marker html markup. <b>If left empty the default Leaflet Marker will be used.</b><br>@token_replacement_disclaimer', [
        '@token_replacement_disclaimer' => $token_replacement_disclaimer,
      ]),
      '#default_value' => isset($icon_options['html']) ? $icon_options['html'] : $default_settings['icon']['html'],
      '#rows' => 3,
      '#states' => [
        'visible' => [
          $icon_type => [
            'value' => 'html',
          ],
        ],
        'required' => [
          $icon_type => [
            'value' => 'html',
          ],
        ],
      ],
    ];
    $element['html_class'] = [
      '#type' => 'textfield',
      '#title' => t('Marker HTML class'),
      '#description' => t('Required class name for the div used to wrap field output. For multiple classes, separate with a space.'),
      '#default_value' => isset($icon_options['html_class']) ? $icon_options['html_class'] : $default_settings['icon']['html_class'],
      '#states' => [
        'visible' => [
          $icon_type => [
            'value' => 'html',
          ],
        ],
      ],
    ];
    $element['circle_marker_options'] = [
      '#type' => 'textarea',
      '#rows' => 2,
      '#title' => $this
        ->t('Circle Marker Options'),
      '#description' => $this
        ->t('An object literal of Circle Marker options, that comply with the @leaflet_circle_marker_object.<br>The syntax should respect the javascript object notation (json) format.<br>As suggested in the field placeholder, always use double quotes (") both for the indexes and the string values.<br><b>Note: </b> Use <strong>Replacement Patterns</strong> to input dynamic values.<br>Empty value will fallback to default Leaflet Circle Marker style.', [
        '@leaflet_circle_marker_object' => $this->link
          ->generate('Leaflet Circle Marker object', Url::fromUri('https://leafletjs.com/reference-1.6.0.html#circlemarker', [
          'absolute' => TRUE,
          'attributes' => [
            'target' => 'blank',
          ],
        ])),
      ]),
      '#default_value' => isset($icon_options['circle_marker_options']) ? $icon_options['circle_marker_options'] : $default_settings['icon']['circle_marker_options'],
      '#placeholder' => $default_settings['icon']['circle_marker_options'],
      '#element_validate' => [
        [
          get_class($this),
          'jsonValidate',
        ],
      ],
      '#states' => [
        'visible' => [
          $icon_type => [
            'value' => 'circle_marker',
          ],
        ],
      ],
    ];
    if (method_exists($this, 'getProvider') && $this
      ->getProvider() == 'leaflet_views') {
      $twig_link = $this->link
        ->generate('Twig', Url::fromUri('http://twig.sensiolabs.org/documentation', [
        'absolute' => TRUE,
        'attributes' => [
          'target' => 'blank',
        ],
      ]));
      $icon_url_description .= '<br>' . $this
        ->t('You may include @twig_link. You may enter data from this view as per the "Replacement patterns" below.', [
        '@twig_link' => $twig_link,
      ]);
      $element['iconUrl']['#description'] = $icon_url_description;
      $element['shadowUrl']['#description'] = $icon_url_description;

      // Setup the tokens for views fields.
      // Code is snatched from Drupal\views\Plugin\views\field\FieldPluginBase.
      $options = [];
      $optgroup_fields = (string) t('Fields');
      if (isset($this->displayHandler)) {
        foreach ($this->displayHandler
          ->getHandlers('field') as $id => $field) {

          /* @var \Drupal\views\Plugin\views\field\EntityField $field */
          $options[$optgroup_fields]["{{ {$id} }}"] = substr(strrchr($field
            ->label(), ":"), 2);
        }
      }

      // Default text.
      $output = [];

      // We have some options, so make a list.
      if (!empty($options)) {
        $output[] = [
          '#markup' => '<p>' . $this
            ->t("The following replacement tokens are available. Fields may be marked as <em>Exclude from display</em> if you prefer.") . '</p>',
        ];
        foreach (array_keys($options) as $type) {
          if (!empty($options[$type])) {
            $items = [];
            foreach ($options[$type] as $key => $value) {
              $items[] = $key;
            }
            $item_list = [
              '#theme' => 'item_list',
              '#items' => $items,
            ];
            $output[] = $item_list;
          }
        }
      }
      $element['help'] = [
        '#type' => 'details',
        '#title' => $this
          ->t('Replacement patterns'),
        '#value' => $output,
      ];
    }
    $element['iconSize'] = [
      '#title' => $this
        ->t('Icon Size'),
      '#type' => 'fieldset',
      '#description' => $this
        ->t("Size of the icon image in pixels (if empty the natural icon image size will be used).<br>Note: Both the values shouldn't be null to be valid."),
    ];
    $element['iconSize']['x'] = [
      '#title' => $this
        ->t('Width'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['iconSize']['x']) ? $icon_options['iconSize']['x'] : NULL,
    ];
    $element['iconSize']['y'] = [
      '#title' => $this
        ->t('Height'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['iconSize']['y']) ? $icon_options['iconSize']['y'] : NULL,
    ];
    $element['iconAnchor'] = [
      '#title' => $this
        ->t('Icon Anchor'),
      '#type' => 'fieldset',
      '#collapsible' => FALSE,
      '#description' => $this
        ->t("The coordinates of the 'tip' of the icon (relative to its top left corner). The icon will be aligned so that this point is at the marker\\'s geographical location.<br>Note: Both the values shouldn't be null to be valid."),
    ];
    $element['iconAnchor']['x'] = [
      '#title' => $this
        ->t('X'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['iconAnchor']) ? $icon_options['iconAnchor']['x'] : NULL,
    ];
    $element['iconAnchor']['y'] = [
      '#title' => $this
        ->t('Y'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['iconAnchor']) ? $icon_options['iconAnchor']['y'] : NULL,
    ];
    $element['shadowSize'] = [
      '#title' => $this
        ->t('Shadow Size'),
      '#type' => 'fieldset',
      '#description' => $this
        ->t("Size of the shadow image in pixels (if empty the natural shadow image size will be used). <br>Note: Both the values shouldn't be null to be valid."),
    ];
    $element['shadowSize']['x'] = [
      '#title' => $this
        ->t('Width'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['shadowSize']['x']) ? $icon_options['shadowSize']['x'] : NULL,
    ];
    $element['shadowSize']['y'] = [
      '#title' => $this
        ->t('Height'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['shadowSize']['y']) ? $icon_options['shadowSize']['y'] : NULL,
    ];
    $element['shadowAnchor'] = [
      '#title' => $this
        ->t('Shadow Anchor'),
      '#type' => 'fieldset',
      '#description' => $this
        ->t("The coordinates of the 'tip' of the shadow (relative to its top left corner) (the same as iconAnchor if not specified).<br>Note: Both the values shouldn't be null to be valid."),
    ];
    $element['shadowAnchor']['x'] = [
      '#title' => $this
        ->t('X'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['shadowAnchor']) ? $icon_options['shadowAnchor']['x'] : NULL,
    ];
    $element['shadowAnchor']['y'] = [
      '#title' => $this
        ->t('Y'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['shadowAnchor']) ? $icon_options['shadowAnchor']['y'] : NULL,
    ];
    $element['popupAnchor'] = [
      '#title' => $this
        ->t('Popup Anchor'),
      '#type' => 'fieldset',
      '#collapsible' => FALSE,
      '#description' => $this
        ->t("The coordinates of the point from which popups will 'open', relative to the icon anchor.<br>Note: Both the values shouldn't be null to be valid."),
    ];
    $element['popupAnchor']['x'] = [
      '#title' => $this
        ->t('X'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['popupAnchor']) ? $icon_options['popupAnchor']['x'] : NULL,
    ];
    $element['popupAnchor']['y'] = [
      '#title' => $this
        ->t('Y'),
      '#type' => 'number',
      '#default_value' => isset($icon_options['popupAnchor']) ? $icon_options['popupAnchor']['y'] : NULL,
    ];
    return $element;
  }

  /**
   * Set Map Geometries Options Element.
   *
   * @param array $element
   *   The Form element to alter.
   * @param array $settings
   *   The Form Settings.
   */
  protected function setMapPathOptionsElement(array &$element, array $settings) {
    $token_replacement_disclaimer = $this
      ->t('<b>Note: </b> Using <strong>Replacement Patterns</strong> it is possible to dynamically define the Path geometries options, based on the entity properties or fields values.');
    $path_description = $this
      ->t('Set here options that will be applied to the rendering of Map Path Geometries (Lines & Polylines, Polygons, Multipolygons, etc.).<br>Refer to the @polygons_documentation.<br>Note: If empty the default Leaflet path style, or the one choosen and defined in leaflet.api/hook_leaflet_map_info, will be used.<br>@token_replacement_disclaimer', [
      '@polygons_documentation' => $this->link
        ->generate($this
        ->t('Leaflet Path Documentation'), Url::fromUri('https://leafletjs.com/reference-1.0.3.html#path', [
        'absolute' => TRUE,
        'attributes' => [
          'target' => 'blank',
        ],
      ])),
      '@token_replacement_disclaimer' => $token_replacement_disclaimer,
    ]);
    $element['path'] = [
      '#type' => 'textarea',
      '#title' => $this
        ->t('Path Geometries Options'),
      '#rows' => 3,
      '#description' => $path_description,
      '#default_value' => $settings['path'],
      '#placeholder' => $this::getDefaultSettings()['path'],
      '#element_validate' => [
        [
          get_class($this),
          'jsonValidate',
        ],
      ],
    ];
  }

  /**
   * Set Map additional map Settings.
   *
   * @param array $map
   *   The map object.
   * @param array $options
   *   The options from where to set additional options.
   */
  protected function setAdditionalMapOptions(array &$map, array $options) {
    $default_settings = $this::getDefaultSettings();

    // Add additional settings to the Map, with fallback on the
    // hook_leaflet_map_info ones.
    $map['settings']['map_position_force'] = isset($options['map_position']['force']) ? $options['map_position']['force'] : $default_settings['map_position']['force'];
    $map['settings']['zoom'] = isset($options['map_position']['zoom']) ? (int) $options['map_position']['zoom'] : $default_settings['map_position']['zoom'];
    $map['settings']['zoomFiner'] = isset($options['map_position']['zoomFiner']) ? (int) $options['map_position']['zoomFiner'] : $default_settings['map_position']['zoomFiner'];
    $map['settings']['minZoom'] = isset($options['map_position']['minZoom']) ? (int) $options['map_position']['minZoom'] : $default_settings['settings']['minZoom'];
    $map['settings']['maxZoom'] = isset($options['map_position']['maxZoom']) ? (int) $options['map_position']['maxZoom'] : $default_settings['settings']['maxZoom'];
    $map['settings']['center'] = isset($options['map_position']['center']['lat']) && isset($options['map_position']['center']['lon']) ? [
      'lat' => floatval($options['map_position']['center']['lat']),
      'lon' => floatval($options['map_position']['center']['lon']),
    ] : $default_settings['map_position']['center'];
    $map['settings']['scrollWheelZoom'] = !empty($options['disable_wheel']) ? !(bool) $options['disable_wheel'] : (isset($map['settings']['scrollWheelZoom']) ? $map['settings']['scrollWheelZoom'] : TRUE);
    $map['settings']['path'] = isset($options['path']) && !empty($options['path']) ? $options['path'] : (isset($map['path']) ? Json::encode($map['path']) : Json::encode($default_settings['path']));
    $map['settings']['leaflet_markercluster'] = isset($options['leaflet_markercluster']) ? $options['leaflet_markercluster'] : NULL;
    $map['settings']['fullscreen_control'] = isset($options['fullscreen_control']) ? $options['fullscreen_control'] : $default_settings['fullscreen_control'];
    $map['settings']['gestureHandling'] = isset($options['gesture_handling']) ? $options['gesture_handling'] : $default_settings['gesture_handling'];
    $map['settings']['reset_map'] = isset($options['reset_map']) ? $options['reset_map'] : $default_settings['reset_map'];
    $map['settings']['geocoder'] = isset($options['geocoder']) ? $options['geocoder'] : $default_settings['geocoder'];
  }

  /**
   * Set Map MarkerCluster Element.
   *
   * @param array $element
   *   The Form element to alter.
   * @param array $settings
   *   The Form Settings.
   */
  protected function setMapMarkerclusterElement(array &$element, array $settings) {
    $default_settings = $this::getDefaultSettings();
    $leaflet_markercluster_submodule_warning = $this
      ->t("<u>Note</u>: This functionality and settings are related to the Leaflet Markercluster submodule, present inside the Leaflet module itself.<br><u>(DON'T USE the external self standing Leaflet Markecluster module).</u>");
    $element['leaflet_markercluster'] = [
      '#type' => 'fieldset',
      '#title' => $this
        ->t('Marker Clustering'),
    ];
    if ($this->moduleHandler
      ->moduleExists('leaflet_markercluster')) {
      $element['leaflet_markercluster']['control'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Enable the functionality of the @markeclusterer_api_link.', [
          '@markeclusterer_api_link' => $this->link
            ->generate($this
            ->t('Leaflet Markercluster Js Library'), Url::fromUri('https://github.com/Leaflet/Leaflet.markercluster', [
            'absolute' => TRUE,
            'attributes' => [
              'target' => 'blank',
            ],
          ])),
        ]),
        '#default_value' => isset($settings['leaflet_markercluster']['control']) ? $settings['leaflet_markercluster']['control'] : $default_settings['leaflet_markercluster']['control'],
        '#description' => $this
          ->t("@leaflet_markercluster_submodule_warning", [
          '@leaflet_markercluster_submodule_warning' => $leaflet_markercluster_submodule_warning,
        ]),
        '#return_value' => 1,
      ];
      $element['leaflet_markercluster']['options'] = [
        '#type' => 'textarea',
        '#rows' => 4,
        '#title' => $this
          ->t('Marker Cluster Additional Options'),
        '#description' => $this
          ->t('An object literal of additional marker cluster options, that comply with the Leaflet Markercluster Js Library.<br>The syntax should respect the javascript object notation (json) format.<br>As suggested in the field placeholder, always use double quotes (") both for the indexes and the string values.'),
        '#default_value' => isset($settings['leaflet_markercluster']['options']) ? $settings['leaflet_markercluster']['options'] : $default_settings['leaflet_markercluster']['options'],
        '#placeholder' => $default_settings['leaflet_markercluster']['options'],
        '#element_validate' => [
          [
            get_class($this),
            'jsonValidate',
          ],
        ],
      ];
      if (isset($this->fieldDefinition)) {
        $element['leaflet_markercluster']['options']['#states'] = [
          'visible' => [
            ':input[name="fields[' . $this->fieldDefinition
              ->getName() . '][settings_edit_form][settings][leaflet_markercluster][control]"]' => [
              'checked' => TRUE,
            ],
          ],
        ];
      }
      else {
        $element['leaflet_markercluster']['options']['#states'] = [
          'visible' => [
            ':input[name="style_options[leaflet_markercluster][control]"]' => [
              'checked' => TRUE,
            ],
          ],
        ];
      }
    }
    else {
      $element['leaflet_markercluster']['markup'] = [
        '#markup' => $this
          ->t("Enable the Leaflet Markecluster submodule to activate this functionality.<br>@leaflet_markercluster_submodule_warning", [
          '@leaflet_markercluster_submodule_warning' => $leaflet_markercluster_submodule_warning,
        ]),
      ];
    }
  }

  /**
   * Set Map MarkerCluster Element.
   *
   * @param array $element
   *   The Form element to alter.
   * @param array $settings
   *   The Form Settings.
   */
  protected function setResetMapControl(array &$element, array $settings) {
    $default_settings = $this::getDefaultSettings();
    $element['reset_map'] = [
      '#type' => 'fieldset',
      '#title' => $this
        ->t('Reset Map Control'),
    ];
    $element['reset_map']['control'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Enable Map Reset Control'),
      '#description' => $this
        ->t('This will show a "Reset Map" button to reset the Map to its initial center & zoom state<br><b><u>Warning: </u></b>Due to an issue in the Leaflet library (@see https://github.com/Leaflet/Leaflet/issues/6172) the Map Reset control doesn\'t work correctly in Fitting Bounds of coordinates having mixed positive and negative values of latitude &longitudes.<br>In this case the Map will be Reset to the default set Map Center.'),
      '#default_value' => isset($settings['reset_map']['control']) ? $settings['reset_map']['control'] : $default_settings['reset_map']['control'],
    ];
    $element['reset_map']['position'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Position'),
      '#options' => $this->controlPositionsOptions,
      '#default_value' => isset($settings['reset_map']['position']) ? $settings['reset_map']['position'] : $default_settings['reset_map']['position'],
    ];
    if (isset($this->fieldDefinition)) {
      $element['reset_map']['position']['#states'] = [
        'visible' => [
          ':input[name="fields[' . $this->fieldDefinition
            ->getName() . '][settings_edit_form][settings][reset_map][control]"]' => [
            'checked' => TRUE,
          ],
        ],
      ];
    }
    else {
      $element['reset_map']['position']['#states'] = [
        'visible' => [
          ':input[name="style_options[reset_map][control]"]' => [
            'checked' => TRUE,
          ],
        ],
      ];
    }
  }

  /**
   * Set Map Geocoder Control Element.
   *
   * @param array $element
   *   The Form element to alter.
   * @param array $settings
   *   The Form Settings.
   */
  protected function setGeocoderMapControl(array &$element, array $settings) {

    // Set Map Geocoder Control Element, if the Geocoder Module exists,
    // otherwise output a tip on Geocoder Module Integration.
    if ($this->moduleHandler
      ->moduleExists('geocoder') && class_exists('\\Drupal\\geocoder\\Controller\\GeocoderApiEnpoints')) {
      $default_settings = $this::getDefaultSettings();
      $element['geocoder'] = [
        '#type' => 'fieldset',
        '#title' => $this
          ->t('Map Control - Geocoder'),
      ];
      $element['geocoder']['control'] = [
        '#type' => 'checkbox',
        '#title' => $this
          ->t('Enable Map Geocoder Control'),
        '#description' => $this
          ->t('This will add a Geocoder control element to the Leaflet Map'),
        '#default_value' => isset($settings['geocoder']['control']) ? $settings['geocoder']['control'] : $default_settings['geocoder']['control'],
      ];
      $element['geocoder']['access_warning'] = [
        '#type' => 'html_tag',
        '#tag' => 'div',
        '#value' => $this
          ->t('<strong>Note: </strong>This will show to users with permissions to <u>Access Geocoder Api Url Enpoints.</u>'),
        '#attributes' => [
          'style' => 'color: red;',
        ],
      ];
      $element['geocoder']['settings'] = [
        '#type' => 'fieldset',
        '#title' => $this
          ->t('Geocoder Settings'),
      ];
      $element['geocoder']['settings']['position'] = [
        '#type' => 'select',
        '#title' => $this
          ->t('Position'),
        '#options' => $this->controlPositionsOptions,
        '#default_value' => isset($settings['geocoder']['settings']['position']) ? $settings['geocoder']['settings']['position'] : $default_settings['geocoder']['settings']['position'],
      ];
      $element['geocoder']['settings']['input_size'] = [
        '#title' => $this
          ->t('Input Size'),
        '#type' => 'number',
        '#min' => 10,
        '#max' => 100,
        '#default_value' => isset($settings['geocoder']['settings']['input_size']) ? $settings['geocoder']['settings']['input_size'] : $default_settings['geocoder']['settings']['input_size'],
        '#description' => $this
          ->t('The characters size/length of the Geocoder Input element.'),
      ];
      $providers_settings = isset($settings['geocoder']['settings']['providers']) ? $settings['geocoder']['settings']['providers'] : [];

      // Get the enabled/selected providers.
      $enabled_providers = [];
      foreach ($providers_settings as $plugin_id => $plugin) {
        if (!empty($plugin['checked'])) {
          $enabled_providers[] = $plugin_id;
        }
      }

      // Generates the Draggable Table of Selectable Geocoder Providers.

      /** @var \Drupal\geocoder\ProviderPluginManager  $geocoder_provider */
      $geocoder_provider = \Drupal::service('plugin.manager.geocoder.provider');
      $element['geocoder']['settings']['providers'] = $geocoder_provider
        ->providersPluginsTableList($enabled_providers);

      // Set a validation for the providers selection.
      $element['geocoder']['settings']['providers']['#element_validate'] = [
        [
          get_class($this),
          'validateGeocoderProviders',
        ],
      ];
      $element['geocoder']['settings']['min_terms'] = [
        '#type' => 'number',
        '#default_value' => isset($settings['geocoder']['settings']['min_terms']) ? $settings['geocoder']['settings']['min_terms'] : $default_settings['geocoder']['settings']['min_terms'],
        '#title' => $this
          ->t('The (minimum) number of terms for the Geocoder to start processing.'),
        '#description' => $this
          ->t('Valid values ​​for the widget are between 2 and 10. A too low value (<= 3) will affect the application Geocode Quota usage.<br>Try to increase this value if you are experiencing Quota usage matters.'),
        '#min' => 2,
        '#max' => 10,
        '#size' => 3,
      ];
      $element['geocoder']['settings']['delay'] = [
        '#type' => 'number',
        '#default_value' => isset($settings['geocoder']['settings']['delay']) ? $settings['geocoder']['settings']['delay'] : $default_settings['geocoder']['settings']['delay'],
        '#title' => $this
          ->t('The delay (in milliseconds) between pressing a key in the Address Input field and starting the Geocoder search.'),
        '#description' => $this
          ->t('Valid values ​​for the widget are multiples of 100, between 300 and 3000. A too low value (<= 300) will affect / increase the application Geocode Quota usage.<br>Try to increase this value if you are experiencing Quota usage matters.'),
        '#min' => 300,
        '#max' => 3000,
        '#step' => 100,
        '#size' => 4,
      ];
      $element['geocoder']['settings']['zoom'] = [
        '#title' => $this
          ->t('Zoom to Focus'),
        '#type' => 'number',
        '#min' => 1,
        '#max' => 22,
        '#default_value' => isset($settings['geocoder']['settings']['zoom']) ? $settings['geocoder']['settings']['zoom'] : $default_settings['geocoder']['settings']['zoom'],
        '#description' => $this
          ->t('Zoom level to Focus on the Map upon the Geocoder Address selection.'),
      ];
      $element['geocoder']['settings']['popup'] = [
        '#title' => $this
          ->t('Open Popup on Geocode Focus'),
        '#type' => 'checkbox',
        '#default_value' => isset($settings['geocoder']['settings']['popup']) ? $settings['geocoder']['settings']['popup'] : $default_settings['geocoder']['settings']['popup'],
        '#description' => $this
          ->t('Check this to open a Popup on the Map (with the found Address) upon the Geocode Focus.'),
      ];
      $element['geocoder']['settings']['options'] = [
        '#type' => 'textarea',
        '#rows' => 4,
        '#title' => $this
          ->t('Geocoder Control Specific Options'),
        '#description' => $this
          ->t('This settings would override general Geocoder Providers options. (<u>Note: This would work only for Geocoder 2.x branch/version.</u>)<br>An object literal of specific Geocoder options.The syntax should respect the javascript object notation (json) format.<br>As suggested in the field placeholder, always use double quotes (") both for the indexes and the string values.'),
        '#default_value' => isset($settings['geocoder']['settings']['options']) ? $settings['geocoder']['settings']['options'] : $default_settings['geocoder']['settings']['options'],
        '#placeholder' => '{"googlemaps":{"locale": "it", "region": "it"}, "nominatim":{"locale": "it"}}',
        '#element_validate' => [
          [
            get_class($this),
            'jsonValidate',
          ],
        ],
      ];
      if (isset($this->fieldDefinition)) {
        $element['geocoder']['settings']['#states'] = [
          'visible' => [
            ':input[name="fields[' . $this->fieldDefinition
              ->getName() . '][settings_edit_form][settings][geocoder][control]"]' => [
              'checked' => TRUE,
            ],
          ],
        ];
      }
      else {
        $element['geocoder']['settings']['#states'] = [
          'visible' => [
            ':input[name="style_options[geocoder][control]"]' => [
              'checked' => TRUE,
            ],
          ],
        ];
      }
    }
    else {
      $element['geocoder'] = [
        '#markup' => $this
          ->t('<strong>Note: </strong>it is possible to enable a <u>Geocoder controller on the Leaflet Map</u> throughout the @geocoder_module_link integration (version higher than 8.x-2.3 and 8.x-3.0-alpha2).', [
          '@geocoder_module_link' => $this->link
            ->generate('Geocoder Module', Url::fromUri('https://www.drupal.org/project/geocoder', [
            'attributes' => [
              'target' => 'blank',
            ],
          ])),
        ]),
      ];
    }
  }

  /**
   * Form element validation handler for a Map Zoom level.
   *
   * {@inheritdoc}
   */
  public static function zoomLevelValidate($element, FormStateInterface &$form_state) {

    // Get to the actual values in a form tree.
    $parents = $element['#parents'];
    $values = $form_state
      ->getValues();
    for ($i = 0; $i < count($parents) - 1; $i++) {
      $values = $values[$parents[$i]];
    }

    // Check the initial map zoom level.
    $zoom = $element['#value'];
    $min_zoom = $values['minZoom'];
    $max_zoom = $values['maxZoom'];
    if ($zoom < $min_zoom || $zoom > $max_zoom) {
      $form_state
        ->setError($element, t('The @zoom_field should be between the Minimum and the Maximum Zoom levels.', [
        '@zoom_field' => $element['#title'],
      ]));
    }
  }

  /**
   * Form element validation handler for the Map Max Zoom level.
   *
   * {@inheritdoc}
   */
  public static function maxZoomLevelValidate($element, FormStateInterface &$form_state) {

    // Get to the actual values in a form tree.
    $parents = $element['#parents'];
    $values = $form_state
      ->getValues();
    for ($i = 0; $i < count($parents) - 1; $i++) {
      $values = $values[$parents[$i]];
    }

    // Check the max zoom level.
    $min_zoom = $values['minZoom'];
    $max_zoom = $element['#value'];
    if ($max_zoom && $max_zoom <= $min_zoom) {
      $form_state
        ->setError($element, t('The Max Zoom level should be above the Minimum Zoom level.'));
    }
  }

  /**
   * Form element json format validation handler.
   *
   * {@inheritdoc}
   */
  public static function jsonValidate($element, FormStateInterface &$form_state) {
    $element_values_array = Json::decode($element['#value']);

    // Check the jsonValue.
    if (!empty($element['#value']) && $element_values_array == NULL) {
      $form_state
        ->setError($element, t('The @field field is not valid Json Format.', [
        '@field' => $element['#title'],
      ]));
    }
    elseif (!empty($element['#value'])) {
      $form_state
        ->setValueForElement($element, Json::encode($element_values_array));
    }
  }

  /**
   * Validates the Geocoder Providers element.
   *
   * @param array $element
   *   The form element to build.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The form state.
   */
  public static function validateGeocoderProviders(array $element, FormStateInterface &$form_state) {
    $form_state_input = $form_state
      ->getUserInput();
    if (isset($form_state_input['style_options'])) {
      $geocoder_control = $form_state_input['style_options']['geocoder']['control'];
    }
    if (isset($form_state_input['fields'])) {
      $geocoder_control = $form_state_input['fields'][$element['#array_parents'][1]]['settings_edit_form']['settings']['geocoder']['control'];
    }
    if (isset($geocoder_control) && $geocoder_control) {
      $providers = is_array($element['#value']) ? array_filter($element['#value'], function ($value) {
        return isset($value['checked']) && TRUE == $value['checked'];
      }) : [];
      if (empty($providers)) {
        $form_state
          ->setError($element, t('The Geocode Origin option needs at least one geocoder plugin selected.'));
      }
    }
  }

}