Issue #2005434 by alexpott, heddn, andrewmacpherson, swentel: Let 3rd party...

Issue #2005434 by alexpott, heddn, andrewmacpherson, swentel: Let 3rd party modules store extra configuration in EntityDisplay.

core/lib/Drupal/Core/Field/FieldDefinitionInterface.php

@@ -91,6 +91,8 @@ public function isDisplayConfigurable($display_context);
    *     for the field type will be used.
    *   - settings: (array) Settings for the plugin specified above. The default
    *     settings for the plugin will be used for settings left unspecified.
+   *   - third_party_settings: (array) Settings provided by other extensions
+   *     through hook_field_formatter_third_party_settings_form().
    *   - weight: (float) The weight of the element. Not needed if 'type' is
    *     'hidden'.
    *   The defaults of the various display options above get applied by the used

core/lib/Drupal/Core/Field/FormatterBase.php

@@ -55,14 +55,17 @@ abstract class FormatterBase extends PluginSettingsBase implements FormatterInte
    *   The formatter label display setting.
    * @param string $view_mode
    *   The view mode.
+   * @param array $third_party_settings
+   *   Any third party settings settings.
    */
-  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode) {
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings) {
     parent::__construct(array(), $plugin_id, $plugin_definition);
 
     $this->fieldDefinition = $field_definition;
     $this->settings = $settings;
     $this->label = $label;
     $this->viewMode = $view_mode;
+    $this->thirdPartySettings = $third_party_settings;
   }
 
   /**

core/lib/Drupal/Core/Field/FormatterPluginManager.php

@@ -68,7 +68,7 @@ public function createInstance($plugin_id, array $configuration = array()) {
       return $plugin_class::create(\Drupal::getContainer(), $configuration, $plugin_id, $plugin_definition);
     }
 
-    return new $plugin_class($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['label'], $configuration['view_mode']);
+    return new $plugin_class($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['label'], $configuration['view_mode'], $configuration['third_party_settings']);
   }
 
   /**
@@ -91,6 +91,8 @@ public function createInstance($plugin_id, array $configuration = array()) {
    *       also be used if the requested formatter is not available.
    *     - settings: (array) Settings specific to the formatter. Each setting
    *       defaults to the default value specified in the formatter definition.
+   *     - third_party_settings: (array) Settings provided by other extensions
+   *       through hook_field_formatter_third_party_settings_form().
    *
    * @return \Drupal\Core\Field\FormatterInterface|null
    *   A formatter object or NULL when plugin is not found.
@@ -143,6 +145,7 @@ public function prepareConfiguration($field_type, array $configuration) {
     $configuration += array(
       'label' => 'above',
       'settings' => array(),
+      'third_party_settings' => array(),
     );
     // If no formatter is specified, use the default formatter.
     if (!isset($configuration['type'])) {

core/lib/Drupal/Core/Field/PluginSettingsBase.php

@@ -23,6 +23,15 @@ abstract class PluginSettingsBase extends PluginBase implements PluginSettingsIn
    */
   protected $settings = array();
 
+  /**
+   * The plugin settings injected by third party modules.
+   *
+   * @see hooks
+   *
+   * @var array
+   */
+  protected $thirdPartySettings = array();
+
   /**
    * Whether default settings have been merged into the current $settings.
    *
@@ -84,4 +93,19 @@ public function setSetting($key, $value) {
     return $this;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getThirdPartySetting($module, $key, $default = NULL) {
+    return isset($this->thirdPartySettings[$module][$key]) ? $this->thirdPartySettings[$module][$key] : $default;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setThirdPartySetting($module, $key, $value) {
+    $this->thirdPartySettings[$module][$key] = $value;
+    return $this;
+  }
+
 }

core/lib/Drupal/Core/Field/PluginSettingsInterface.php

@@ -64,4 +64,35 @@ public function setSettings(array $settings);
    */
   public function setSetting($key, $value);
 
+  /**
+   * Returns the value of a third-party setting, or $default if not set.
+   *
+   * @param string $module
+   *   The module providing the third-party setting.
+   * @param string $key
+   *   The setting name.
+   * @param mixed $default
+   *   (optional) The default value if the third party setting is not set.
+   *   Defaults to NULL.
+   *
+   * @return mixed|NULL
+   *   The setting value. Returns NULL if the setting does not exist and
+   *   $default is not provided.
+   */
+  public function getThirdPartySetting($module, $key, $default = NULL);
+
+  /**
+   * Sets the value of a third-party setting for the plugin.
+   *
+   * @param string $module
+   *   The module providing the third-party setting.
+   * @param string $key
+   *   The setting name.
+   * @param mixed $value
+   *   The setting value.
+   *
+   * @return $this
+   */
+  public function setThirdPartySetting($module, $key, $value);
+
 }

core/lib/Drupal/Core/Field/WidgetBase.php

@@ -43,11 +43,14 @@ abstract class WidgetBase extends PluginSettingsBase implements WidgetInterface
    *   The definition of the field to which the widget is associated.
    * @param array $settings
    *   The widget settings.
+   * @param array $third_party_settings
+   *   Any third party settings settings.
    */
-  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings) {
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings) {
     parent::__construct(array(), $plugin_id, $plugin_definition);
     $this->fieldDefinition = $field_definition;
     $this->settings = $settings;
+    $this->thirdPartySettings = $third_party_settings;
   }
 
   /**

core/lib/Drupal/Core/Field/WidgetPluginManager.php

@@ -71,6 +71,8 @@ public function __construct(\Traversable $namespaces, CacheBackendInterface $cac
    *       used if the requested widget is not available.
    *     - settings: (array) Settings specific to the widget. Each setting
    *       defaults to the default value specified in the widget definition.
+   *     - third_party_settings: (array) Settings provided by other extensions
+   *       through hook_field_formatter_third_party_settings_form().
    *
    * @return \Drupal\Core\Field\WidgetInterface|null
    *   A Widget object or NULL when plugin is not found.
@@ -124,7 +126,7 @@ public function createInstance($plugin_id, array $configuration = array()) {
       return $plugin_class::create(\Drupal::getContainer(), $configuration, $plugin_id, $plugin_definition);
     }
 
-    return new $plugin_class($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings']);
+    return new $plugin_class($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['third_party_settings']);
   }
 
 
@@ -143,6 +145,7 @@ public function prepareConfiguration($field_type, array $configuration) {
     // Fill in defaults for missing properties.
     $configuration += array(
       'settings' => array(),
+      'third_party_settings' => array(),
     );
     // If no widget is specified, use the default widget.
     if (!isset($configuration['type'])) {

core/modules/comment/src/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php

@@ -75,6 +75,7 @@ public static function create(ContainerInterface $container, array $configuratio
       $configuration['settings'],
       $configuration['label'],
       $configuration['view_mode'],
+      $configuration['third_party_settings'],
       $container->get('current_user'),
       $container->get('entity.manager')->getStorage('comment'),
       $container->get('entity.manager')->getViewBuilder('comment')
@@ -96,6 +97,8 @@ public static function create(ContainerInterface $container, array $configuratio
    *   The formatter label display setting.
    * @param string $view_mode
    *   The view mode.
+   * @param array $third_party_settings
+   *   Third party settings.
    * @param \Drupal\Core\Session\AccountInterface $current_user
    *   The current user.
    * @param \Drupal\comment\CommentStorageInterface $comment_storage
@@ -103,8 +106,8 @@ public static function create(ContainerInterface $container, array $configuratio
    * @param \Drupal\Core\Entity\EntityViewBuilderInterface $comment_view_builder
    *   The comment view builder.
    */
-  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, AccountInterface $current_user, CommentStorageInterface $comment_storage, EntityViewBuilderInterface $comment_view_builder) {
-    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode);
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings, AccountInterface $current_user, CommentStorageInterface $comment_storage, EntityViewBuilderInterface $comment_view_builder) {
+    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode, $third_party_settings);
     $this->viewBuilder = $comment_view_builder;
     $this->storage = $comment_storage;
     $this->currentUser = $current_user;

core/modules/datetime/src/Plugin/Field/FieldFormatter/DateTimeDefaultFormatter.php

@@ -67,13 +67,15 @@ public static function defaultSettings() {
    *   The formatter label display setting.
    * @param string $view_mode
    *   The view mode.
+   * @param array $third_party_settings
+   *   Third party settings.
    * @param \Drupal\Core\Datetime\Date $date_service
    *   The date service.
    * @param \Drupal\Core\Entity\EntityStorageInterface $date_storage
    *   The date storage.
    */
-  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, Date $date_service, EntityStorageInterface $date_storage) {
-    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode);
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings, Date $date_service, EntityStorageInterface $date_storage) {
+    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode, $third_party_settings);
 
     $this->dateService = $date_service;
     $this->dateStorage = $date_storage;
@@ -90,6 +92,7 @@ public static function create(ContainerInterface $container, array $configuratio
       $configuration['settings'],
       $configuration['label'],
       $configuration['view_mode'],
+      $configuration['third_party_settings'],
       $container->get('date'),
       $container->get('entity.manager')->getStorage('date_format')
     );

core/modules/datetime/src/Plugin/Field/FieldWidget/DateTimeDefaultWidget.php

@@ -34,8 +34,8 @@ class DateTimeDefaultWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
-  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings) {
-    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings);
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings) {
+    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $third_party_settings);
 
     // @todo Inject this once https://drupal.org/node/2035317 is in.
     $this->dateStorage = \Drupal::entityManager()->getStorage('date_format');

core/modules/entity/config/schema/entity.data_types.yml

@@ -4,15 +4,20 @@
 entity_field_view_display_base:
   type: mapping
   mapping:
-    label:
-      type: string
-      label: 'Label setting machine name'
     type:
       type: string
       label: 'Format type machine name'
     weight:
       type: integer
       label: 'Weight'
+    third_party_settings:
+      type: sequence
+      label: 'Third party settings'
+      sequence:
+        - type: entity_view_display.third_party.[%key]
+    label:
+      type: string
+      label: 'Label setting machine name'
 
 # Schema for the base of the form mode display format settings.
 entity_field_form_display_base:
@@ -24,3 +29,8 @@ entity_field_form_display_base:
     weight:
       type: integer
       label: 'Weight'
+    third_party_settings:
+      type: sequence
+      label: 'Third party settings'
+      sequence:
+        - type: entity_form_display.third_party.[%key]

core/modules/entity/config/schema/entity.schema.yml

@@ -115,27 +115,13 @@ entity.form_display.*.*.*:
 
 # Default schema for entity display field with undefined type.
 entity_view_display.field.*:
-  type: mapping
+  type: entity_field_view_display_base
   label: 'Entity display default'
-  mapping:
-    visible:
-      type: boolean
-      label: 'Visibility'
-    weight:
-      type: integer
-      label: 'Weight'
 
 # Default schema for entity form display field with undefined type.
 entity_form_display.field.*:
-  type: mapping
+  type: entity_field_form_display_base
   label: 'Entity form display default'
-  mapping:
-    visible:
-      type: boolean
-      label: 'Visibility'
-    weight:
-      type: integer
-      label: 'Weight'
 
 entity_form_display.field.string:
   type: entity_field_form_display_base

core/modules/entity/src/EntityDisplayBase.php

@@ -177,6 +177,12 @@ public function calculateDependencies() {
       if (isset($component['type']) && $definition = $this->pluginManager->getDefinition($component['type'], FALSE)) {
         $this->addDependency('module', $definition['provider']);
       }
+      // Create dependencies on any modules providing third party settings.
+      if (isset($component['third_party_settings'])) {
+        foreach($component['third_party_settings'] as $module => $settings) {
+          $this->addDependency('module', $module);
+        }
+      }
     }
     // Depend on configured modes.
     if ($this->mode != 'default') {

core/modules/entity/src/Tests/EntityDisplayTest.php

@@ -69,6 +69,7 @@ public function testEntityDisplayCRUD() {
       'type' => 'string',
       'weight' => -5,
       'settings' => array(),
+      'third_party_settings' => array(),
     );
     $this->assertEqual($display->getComponents(), $expected);
 
@@ -174,6 +175,7 @@ public function testFieldComponent() {
       'label' => 'above',
       'type' => $default_formatter,
       'settings' => $formatter_settings,
+      'third_party_settings' => array(),
     );
     $this->assertEqual($display->getComponent($field_name), $expected);
 
@@ -221,12 +223,14 @@ public function testBaseFieldComponent() {
         'label' => 'above',
         'type' => 'text_default',
         'settings' => $formatter_settings,
+        'third_party_settings' => array(),
         'weight' => 10,
       ),
       'test_display_non_configurable' => array(
         'label' => 'above',
         'type' => 'text_default',
         'settings' => $formatter_settings,
+        'third_party_settings' => array(),
         'weight' => 11,
       ),
     );

core/modules/entity/src/Tests/EntityFormDisplayTest.php

@@ -84,6 +84,7 @@ public function testFieldComponent() {
       'weight' => 0,
       'type' => $default_widget,
       'settings' => $widget_settings,
+      'third_party_settings' => array(),
     );
     $this->assertEqual($form_display->getComponent($field_name), $expected);
 
@@ -136,11 +137,13 @@ public function testBaseFieldComponent() {
       'test_display_configurable' => array(
         'type' => 'text_textfield',
         'settings' => $formatter_settings,
+        'third_party_settings' => array(),
         'weight' => 10,
       ),
       'test_display_non_configurable' => array(
         'type' => 'text_textfield',
         'settings' => $formatter_settings,
+        'third_party_settings' => array(),
         'weight' => 11,
       ),
     );

core/modules/field/tests/modules/field_test/config/schema/field_test.schema.yml

+entity_view_display.field.field_test_multiple:
+  type: entity_field_view_display_base
+  label: 'field_test display format settings'
+  mapping:
+    settings:
+      type: mapping
+      label: 'Settings'
+      mapping:
+        test_formatter_setting_multiple:
+          type: string
+          label: 'Test setting'
+
+entity_form_display.field.test_field_widget_multiple:
+  type: entity_field_form_display_base
+  label: 'field_test display format settings'
+  mapping:
+    settings:
+      type: mapping
+      label: 'Settings'
+      mapping:
+        test_widget_setting_multiple:
+          type: string
+          label: 'Test setting'

core/modules/field/tests/modules/field_test/field_test.module

@@ -155,44 +155,6 @@ function field_test_query_efq_metadata_test_alter(&$query) {
   $efq_test_metadata = $query->getMetadata('foo');
 }
 
-/**
- * Implements hook_field_widget_settings_form_alter().
- */
-function field_test_field_widget_settings_form_alter(&$element, &$form_state, $context) {
-  $element['field_test_widget_settings_form_alter'] = array(
-    '#type' => 'textfield',
-    '#title' => t('Widget settings form alter'),
-    '#default_value' => $context['widget']->getSetting('field_test_widget_settings_form_alter'),
-  );
-}
-
-/**
- * Implements hook_field_widget_settings_summary_alter().
- */
-function field_test_field_widget_settings_summary_alter(&$summary, $context) {
-  $summary[] = 'field_test_field_widget_settings_summary_alter';
-  return $summary;
-}
-
-/**
- * Implements hook_field_formatter_settings_form_alter().
- */
-function field_test_field_formatter_settings_form_alter(&$element, &$form_state, $context) {
-  $element['field_test_formatter_settings_form_alter'] = array(
-    '#type' => 'textfield',
-    '#title' => t('Formatter settings form alter'),
-    '#default_value' => $context['formatter']->getSetting('field_test_formatter_settings_form_alter'),
-  );
-}
-
-/**
- * Implements hook_field_formatter_settings_summary_alter().
- */
-function field_test_field_formatter_settings_summary_alter(&$summary, $context) {
-  $summary[] = 'field_test_field_formatter_settings_summary_alter';
-  return $summary;
-}
-
 /**
  * Implements hook_entity_extra_field_info_alter().
  */

core/modules/field/tests/modules/field_third_party_test/config/schema/field_third_party_test.schema.yml

+entity_view_display.third_party.field_third_party_test:
+  type: mapping
+  label: 'field_third_party_test entity display settings'
+  mapping:
+    field_test_field_formatter_third_party_settings_form:
+      type: string
+      label: field_test_field_formatter_third_party_settings_form
+
+entity_form_display.third_party.field_third_party_test:
+  type: mapping
+  label: 'field_third_party_test entity form display settings'
+  mapping:
+    field_test_widget_third_party_settings_form:
+      type: string
+      label: field_test_widget_third_party_settings_form

core/modules/field/tests/modules/field_third_party_test/field_third_party_test.info.yml

+name: 'Field Third Party Settings Test'
+type: module
+description: 'Support module for the Field API tests.'
+core: 8.x
+package: Testing
+version: VERSION
+dependencies:
+  - entity_test
+  - field_test

core/modules/field/tests/modules/field_third_party_test/field_third_party_test.module

+<?php
+
+/**
+ * Implements hook_field_widget_third_party_settings_form().
+ */
+function field_third_party_test_field_widget_third_party_settings_form(\Drupal\Core\Field\WidgetInterface $plugin, \Drupal\Core\Field\FieldDefinitionInterface $field_definition, $form_mode, $form, $form_state) {
+  $element['field_test_widget_third_party_settings_form'] = array(
+    '#type' => 'textfield',
+    '#title' => t('3rd party widget settings form'),
+    '#default_value' => $plugin->getThirdPartySetting('field_third_party_test', 'field_test_widget_third_party_settings_form'),
+  );
+  return $element;
+}
+
+/**
+ * Implements hook_field_widget_settings_summary_alter().
+ */
+function field_third_party_test_field_widget_settings_summary_alter(&$summary, $context) {
+  $summary[] = 'field_test_field_widget_settings_summary_alter';
+  return $summary;
+}
+
+/**
+ * Implements hook_field_formatter_third_party_settings_form().
+ */
+function field_third_party_test_field_formatter_third_party_settings_form(\Drupal\Core\Field\FormatterInterface $plugin, \Drupal\Core\Field\FieldDefinitionInterface $field_definition, $view_mode, $form, $form_state) {
+  $element['field_test_field_formatter_third_party_settings_form'] = array(
+    '#type' => 'textfield',
+    '#title' => t('3rd party formatter settings form'),
+    '#default_value' => $plugin->getThirdPartySetting('field_third_party_test', 'field_test_field_formatter_third_party_settings_form'),
+  );
+  return $element;
+}
+
+/**
+ * Implements hook_field_formatter_settings_summary_alter().
+ */
+function field_third_party_test_field_formatter_settings_summary_alter(&$summary, $context) {
+  $summary[] = 'field_test_field_formatter_settings_summary_alter';
+  return $summary;
+}
+

core/modules/field_ui/field_ui.api.php

@@ -11,65 +11,76 @@
  */
 
 /**
- * Alters the formatter settings form.
+ * Allow modules to add settings to field formatters provided by other modules.
  *
- * @param $element
- *   Form array.
- * @param $form_state
- *   The form state of the (entire) configuration form.
- * @param $context
- *   An associative array with the following elements:
- *   - formatter: The formatter object.
- *   - field_definition: The field definition.
- *   - view_mode: The view mode being configured.
- *   - form: The (entire) configuration form array.
+ * @param \Drupal\Core\Field\FormatterInterface $plugin
+ *   The instantiated field formatter plugin.
+ * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
+ *   The field definition.
+ * @param $view_mode
+ *   The entity view mode.
+ * @param array $form
+ *   The (entire) configuration form array.
+ * @param array $form_state
+ *   The form state.
+ *
+ * @return array
+ *   Returns the form array to be built.
  *
  * @see \Drupal\field_ui\DisplayOverView.
  */
-function hook_field_formatter_settings_form_alter(&$element, &$form_state, $context) {
-  // Add a 'mysetting' checkbox to the settings form for 'foo_formatter'
-  // field formatters.
-  if ($context['formatter']->getPluginId() == 'foo_formatter') {
-    $element['mysetting'] = array(
+function hook_field_formatter_third_party_settings_form(\Drupal\Core\Field\FormatterInterface $plugin, \Drupal\Core\Field\FieldDefinitionInterface $field_definition, $view_mode, $form, $form_state) {
+  $element = array();
+  // Add a 'my_setting' checkbox to the settings form for 'foo_formatter' field
+  // formatters.
+  if ($plugin->getPluginId() == 'foo_formatter') {
+    $element['my_setting'] = array(
       '#type' => 'checkbox',
       '#title' => t('My setting'),
-      '#default_value' => $context['formatter']->getSetting('mysetting'),
+      '#default_value' => $plugin->getThirdPartySetting('my_module', 'my_setting'),
     );
   }
+  return $element;
 }
 
 /**
- * Alters the widget settings form.
+ * Allow modules to add settings to field widgets provided by other modules.
  *
- * @param array $element
- *   Form array.
+ * @param \Drupal\Core\Field\WidgetInterface $plugin
+ *   The instantiated field widget plugin.
+ * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
+ *   The field definition.
+ * @param $form_mode
+ *   The entity form mode.
+ * @param array $form
+ *   The (entire) configuration form array.
  * @param array $form_state
- *   The form state of the (entire) configuration form.
- * @param array $context
- *   An associative array with the following elements:
- *   - formatter: The formatter object.
- *   - field_definition: The field definition.
- *   - form_mode: The form mode being configured.
- *   - form: The (entire) configuration form array.
+ *   The form state.
+ *
+ * @return array
+ *   Returns the form array to be built.
  *
  * @see \Drupal\field_ui\FormDisplayOverView.
  */
-function hook_field_widget_settings_form_alter(&$element, &$form_state, $context) {
-  // Add a 'mysetting' checkbox to the settings form for 'foo_field' fields.
-  if ($context['field']['type'] == 'foo_field') {
-    $element['mysetting'] = array(
+function hook_field_widget_third_party_settings_form(\Drupal\Core\Field\WidgetInterface $plugin, \Drupal\Core\Field\FieldDefinitionInterface $field_definition, $form_mode, $form, $form_state) {
+  $element = array();
+  // Add a 'my_setting' checkbox to the settings form for 'foo_widget' field
+  // widgets.
+  if ($plugin->getPluginId() == 'foo_widget') {
+    $element['my_setting'] = array(
       '#type' => 'checkbox',
       '#title' => t('My setting'),
-      '#default_value' => $context['formatter']->getSetting('mysetting'),
+      '#default_value' => $plugin->getThirdPartySetting('my_module', 'my_setting'),
     );
   }
+  return $element;
 }
 
 /**
  * Alters the field formatter settings summary.
  *
- * @param $summary
- *   The summary.
+ * @param array $summary
+ *   An array of summary messages.
  * @param $context
  *   An associative array with the following elements:
  *   - formatter: The formatter object.
@@ -82,7 +93,7 @@ function hook_field_formatter_settings_summary_alter(&$summary, $context) {
   // Append a message to the summary when an instance of foo_formatter has
   // mysetting set to TRUE for the current view mode.
   if ($context['formatter']->getPluginId() == 'foo_formatter') {
-    if ($context['formatter']->getSetting('mysetting')) {
+    if ($context['formatter']->getThirdPartySetting('my_module', 'my_setting')) {
       $summary[] = t('My setting enabled.');
     }
   }
@@ -92,7 +103,7 @@ function hook_field_formatter_settings_summary_alter(&$summary, $context) {
  * Alters the field widget settings summary.
  *
  * @param array $summary
- *   The summary.
+ *   An array of summary messages.
  * @param array $context
  *   An associative array with the following elements:
  *   - widget: The widget object.
@@ -102,10 +113,10 @@ function hook_field_formatter_settings_summary_alter(&$summary, $context) {
  * @see \Drupal\field_ui\FormDisplayOverView.
  */
 function hook_field_widget_settings_summary_alter(&$summary, $context) {
-  // Append a message to the summary when an instance of foo_field has
+  // Append a message to the summary when an instance of foo_widget has
   // mysetting set to TRUE for the current view mode.
-  if ($context['field']['type'] == 'foo_field') {
-    if ($context['widget']->getSetting('mysetting')) {
+  if ($context['widget']->getPluginId() == 'foo_widget') {
+    if ($context['widget']->getThirdPartySetting('my_module', 'my_setting')) {
       $summary[] = t('My setting enabled.');
     }
   }

core/modules/field_ui/src/DisplayOverview.php

@@ -14,6 +14,8 @@
 use Drupal\Core\Entity\EntityManagerInterface;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Field\FieldTypePluginManager;
+use Drupal\Core\Field\FormatterInterface;
+use Drupal\Core\Field\PluginSettingsInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -230,20 +232,26 @@ protected function getFieldLabelOptions() {
   /**
    * {@inheritdoc}
    */
-  protected function alterSettingsForm(array &$settings_form, $plugin, FieldDefinitionInterface $field_definition, array $form, array &$form_state) {
-    $context = array(
-      'formatter' => $plugin,
-      'field_definition' => $field_definition,
-      'view_mode' => $this->mode,
-      'form' => $form,
-    );
-    $this->moduleHandler->alter('field_formatter_settings_form', $settings_form, $form_state, $context);
+  protected function thirdPartySettingsForm(PluginSettingsInterface $plugin, FieldDefinitionInterface $field_definition, array $form, array &$form_state) {
+    $settings_form = array();
+    // Invoke hook_field_formatter_third_party_settings_form(), keying resulting
+    // subforms by module name.
+    foreach ($this->moduleHandler->getImplementations('field_formatter_third_party_settings_form') as $module) {
+      $settings_form[$module] = $this->moduleHandler->invoke($module, 'field_formatter_third_party_settings_form', array(
+        $plugin,
+        $field_definition,
+        $this->mode,
+        $form,