diff --git a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/formatter/DatetimeDefaultFormatter.php b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/formatter/DatetimeDefaultFormatter.php
index a46e064..62053c3 100644
--- a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/formatter/DatetimeDefaultFormatter.php
+++ b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/formatter/DatetimeDefaultFormatter.php
@@ -95,7 +95,7 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
 
     $elements = array();
 
diff --git a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/formatter/DatetimePlainFormatter.php b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/formatter/DatetimePlainFormatter.php
index 2eefd13..f9c0331 100644
--- a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/formatter/DatetimePlainFormatter.php
+++ b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/formatter/DatetimePlainFormatter.php
@@ -30,7 +30,7 @@ class DateTimePlainFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
 
     $elements = array();
 
diff --git a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/widget/DatetimeDatelistWidget.php b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/widget/DatetimeDatelistWidget.php
index b208e36..37d2c3b 100644
--- a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/widget/DatetimeDatelistWidget.php
+++ b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/widget/DatetimeDatelistWidget.php
@@ -9,13 +9,9 @@
 use Drupal\field\Annotation\FieldWidget;
 use Drupal\Core\Annotation\Translation;
 use Drupal\field\Plugin\Type\Widget\WidgetBase;
-use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldDefinitionInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
-use Drupal\field\Plugin\PluginSettingsBase;
 use Drupal\field\FieldInstanceInterface;
-use Drupal\Core\Datetime\DrupalDateTime;
 use Drupal\datetime\DateHelper;
 
 /**
@@ -62,7 +58,7 @@ public function defaultValueFunction() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $date_order = $this->getSetting('date_order');
     $time_type = $this->getSetting('time_type');
     $increment = $this->getSetting('increment');
diff --git a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/widget/DatetimeDefaultWidget.php b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/widget/DatetimeDefaultWidget.php
index da550c7..6628dbb 100644
--- a/core/modules/datetime/lib/Drupal/datetime/Plugin/field/widget/DatetimeDefaultWidget.php
+++ b/core/modules/datetime/lib/Drupal/datetime/Plugin/field/widget/DatetimeDefaultWidget.php
@@ -9,13 +9,9 @@
 use Drupal\field\Annotation\FieldWidget;
 use Drupal\Core\Annotation\Translation;
 use Drupal\field\Plugin\Type\Widget\WidgetBase;
-use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldDefinitionInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
-use Drupal\field\Plugin\PluginSettingsBase;
 use Drupal\field\FieldInstanceInterface;
-use Drupal\Core\Datetime\DrupalDateTime;
 
 /**
  * Plugin implementation of the 'datetime_default' widget.
@@ -66,7 +62,7 @@ public function defaultValueFunction() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $format_type = datetime_default_format_type();
 
     // We are nesting some sub-elements inside the parent, so we need a wrapper.
diff --git a/core/modules/email/lib/Drupal/email/Plugin/field/formatter/MailToFormatter.php b/core/modules/email/lib/Drupal/email/Plugin/field/formatter/MailToFormatter.php
index 25e2945..89eef1f 100644
--- a/core/modules/email/lib/Drupal/email/Plugin/field/formatter/MailToFormatter.php
+++ b/core/modules/email/lib/Drupal/email/Plugin/field/formatter/MailToFormatter.php
@@ -29,7 +29,7 @@ class MailToFormatter extends FormatterBase {
   /**
    * Implements Drupal\field\Plugin\Type\Formatter\FormatterInterface::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/email/lib/Drupal/email/Plugin/field/widget/EmailDefaultWidget.php b/core/modules/email/lib/Drupal/email/Plugin/field/widget/EmailDefaultWidget.php
index 624697f..4654e17 100644
--- a/core/modules/email/lib/Drupal/email/Plugin/field/widget/EmailDefaultWidget.php
+++ b/core/modules/email/lib/Drupal/email/Plugin/field/widget/EmailDefaultWidget.php
@@ -61,7 +61,7 @@ public function settingsSummary() {
   /**
    * Implements Drupal\field\Plugin\Type\Widget\WidgetInterface::formElement().
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $element['value'] = $element + array(
       '#type' => 'email',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : NULL,
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceEntityFormatter.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceEntityFormatter.php
index dd054f2..7e53b1d 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceEntityFormatter.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceEntityFormatter.php
@@ -79,9 +79,9 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     // Remove un-accessible items.
-    parent::viewElements($entity, $langcode, $items);
+    parent::viewElements($items);
 
     $view_mode = $this->getSetting('view_mode');
     $links = $this->getSetting('links');
@@ -95,13 +95,13 @@ public function viewElements(EntityInterface $entity, $langcode, FieldInterface
       static $depth = 0;
       $depth++;
       if ($depth > 20) {
-        throw new RecursiveRenderingException(format_string('Recursive rendering detected when rendering entity @entity_type(@entity_id). Aborting rendering.', array('@entity_type' => $entity_type, '@entity_id' => $item->target_id)));
+        throw new RecursiveRenderingException(format_string('Recursive rendering detected when rendering entity @entity_type(@entity_id). Aborting rendering.', array('@entity_type' => $item->entity->entityType(), '@entity_id' => $item->target_id)));
       }
 
       if (!empty($item->target_id)) {
         $entity = clone $item->entity;
         unset($entity->content);
-        $elements[$delta] = entity_view($entity, $view_mode, $langcode);
+        $elements[$delta] = entity_view($entity, $view_mode, $item->getLangcode());
 
         if (empty($links) && isset($result[$delta][$target_type][$item->target_id]['links'])) {
           // Hide the element links.
@@ -110,7 +110,7 @@ public function viewElements(EntityInterface $entity, $langcode, FieldInterface
       }
       else {
         // This is an "auto_create" item.
-        $elements[$delta] = array('#markup' => $entity->label());
+        $elements[$delta] = array('#markup' => $item->entity->label());
       }
       $depth = 0;
     }
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceFormatterBase.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceFormatterBase.php
index 98db38e..a2d8d25 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceFormatterBase.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceFormatterBase.php
@@ -9,7 +9,6 @@
 
 use Drupal\field\Annotation\FieldFormatter;
 use Drupal\Core\Annotation\Translation;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 use Drupal\field\Plugin\Type\Formatter\FormatterBase;
 
@@ -25,13 +24,13 @@
    * values, as other may want to act on those values, even if they can
    * not be accessed.
    */
-  public function prepareView(array $entities, $langcode, array $items) {
+  public function prepareView(array $entities_items) {
     $target_ids = array();
     $revision_ids = array();
 
     // Collect every possible entity attached to any of the entities.
-    foreach ($entities as $id => $entity) {
-      foreach ($items[$id] as $item) {
+    foreach ($entities_items as $items) {
+      foreach ($items as $item) {
         if (!empty($item->revision_id)) {
           $revision_ids[] = $item->revision_id;
         }
@@ -52,31 +51,30 @@ public function prepareView(array $entities, $langcode, array $items) {
     if ($revision_ids) {
       // We need to load the revisions one by-one.
       foreach ($revision_ids as $revision_id) {
-        $entity = entity_revision_load($target_type, $revision_id);
+        $target_entity = entity_revision_load($target_type, $revision_id);
         // Use the revision ID in the key.
-        $identifier = $entity->id() . ':' . $revision_id;
-        $target_entities[$identifier] = $entity;
+        $identifier = $target_entity->id() . ':' . $revision_id;
+        $target_entities[$identifier] = $target_entity;
       }
     }
 
     // Iterate through the fieldable entities again to attach the loaded data.
-    foreach ($entities as $id => $entity) {
+    foreach ($entities_items as $items) {
       $rekey = FALSE;
-      foreach ($items[$id] as $delta => $item) {
+      foreach ($items as $item) {
         // If we have a revision ID, the key uses it as well.
         $identifier = !empty($item->revision_id) ? $item->target_id . ':' . $item->revision_id : $item->target_id;
         if ($item->target_id !== 0) {
           if (!isset($target_entities[$identifier])) {
-            // The entity no longer exists, so remove the key.
+            // The entity no longer exists, so empty the item.
+            $item->setValue(NULL);
             $rekey = TRUE;
-            unset($items[$id][$delta]);
             continue;
           }
 
-          $entity = $target_entities[$identifier];
-          $item->entity = $entity;
+          $item->entity = $target_entities[$identifier];
 
-          if (!$entity->access('view')) {
+          if (!$item->entity->access('view')) {
             continue;
           }
         }
@@ -88,9 +86,9 @@ public function prepareView(array $entities, $langcode, array $items) {
         $item->access = TRUE;
       }
 
+      // Rekey the items array if needed.
       if ($rekey) {
-        // Rekey the items array.
-        $items[$id] = array_values($items[$id]);
+        $items->filterEmptyValues();
       }
     }
   }
@@ -100,7 +98,7 @@ public function prepareView(array $entities, $langcode, array $items) {
    *
    * @see \Drupal\entity_reference\Plugin\field\formatter\EntityReferenceFormatterBase::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     // Remove un-accessible items.
     foreach ($items as $delta => $item) {
       if (empty($item->access)) {
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceIdFormatter.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceIdFormatter.php
index f7402bf..ef6291f 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceIdFormatter.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceIdFormatter.php
@@ -30,7 +30,7 @@ class EntityReferenceIdFormatter extends EntityReferenceFormatterBase {
   /**
    * Overrides \Drupal\entity_reference\Plugin\field\formatter\EntityReferenceFormatterBase::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceLabelFormatter.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceLabelFormatter.php
index c63dfd6..2d5ddd7 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceLabelFormatter.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/formatter/EntityReferenceLabelFormatter.php
@@ -55,9 +55,9 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     // Remove un-accessible items.
-    parent::viewElements($entity, $langcode, $items);
+    parent::viewElements($items);
 
     $elements = array();
 
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/widget/AutocompleteWidget.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/widget/AutocompleteWidget.php
index fb2b575..b5f9d6e 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/widget/AutocompleteWidget.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/widget/AutocompleteWidget.php
@@ -40,7 +40,7 @@ class AutocompleteWidget extends AutocompleteWidgetBase {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     // We let the Field API handles multiple values for us, only take care of
     // the one matching our delta.
     if (isset($items[$delta])) {
@@ -50,7 +50,7 @@ public function formElement(FieldInterface $items, $delta, array $element, $lang
       $items->setValue(array());
     }
 
-    return parent::formElement($items, $delta, $element, $langcode, $form, $form_state);
+    return parent::formElement($items, $delta, $element, $form, $form_state);
   }
 
   /**
diff --git a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/widget/AutocompleteWidgetBase.php b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/widget/AutocompleteWidgetBase.php
index 3587046..d69a99a 100644
--- a/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/widget/AutocompleteWidgetBase.php
+++ b/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/field/widget/AutocompleteWidgetBase.php
@@ -70,9 +70,10 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     global $user;
-    $entity = $element['#entity'];
+
+    $entity = $items->getEntity();
 
     // Prepare the autocomplete path.
     $autocomplete_path = $this->getSetting('autocomplete_path');
diff --git a/core/modules/field/field.api.php b/core/modules/field/field.api.php
index 7f5dec5..50b5edb 100644
--- a/core/modules/field/field.api.php
+++ b/core/modules/field/field.api.php
@@ -198,10 +198,8 @@ function hook_field_widget_info_alter(array &$info) {
  *   - form: The form structure to which widgets are being attached. This may be
  *     a full form structure, or a sub-element of a larger form.
  *   - widget: The widget plugin instance.
- *   - field_definition: The field definition.
- *   - entity: The entity.
- *   - langcode: The language associated with $items.
- *   - items: Array of default values for this field.
+ *   - items: The field values, as a \Drupal\Core\Entity\Field\FieldInterface
+ *     object.
  *   - delta: The order of this item in the array of subelements (0, 1, 2, etc).
  *   - default: A boolean indicating whether the form is being shown as a dummy
  *     form to set default values.
@@ -211,7 +209,8 @@ function hook_field_widget_info_alter(array &$info) {
  */
 function hook_field_widget_form_alter(&$element, &$form_state, $context) {
   // Add a css class to widget form elements for all fields of type mytype.
-  if ($context['field']['type'] == 'mytype') {
+  $field_definition = $context['items']->getFieldDefinition();
+  if ($field_definition->getFieldType() == 'mytype') {
     // Be sure not to overwrite existing attributes.
     $element['#attributes']['class'][] = 'myclass';
   }
diff --git a/core/modules/field/field.attach.inc b/core/modules/field/field.attach.inc
index f12459b..d5d79d5 100644
--- a/core/modules/field/field.attach.inc
+++ b/core/modules/field/field.attach.inc
@@ -123,7 +123,7 @@ function field_invoke_method($method, $target_function, EntityInterface $entity,
         $items = $entity->getTranslation($langcode)->get($field_name);
         $items->filterEmptyValues();
 
-        $result = $target->$method($entity, $langcode, $items, $a, $b);
+        $result = $target->$method($items, $a, $b);
 
         if (isset($result)) {
           // For methods with array results, we merge results together.
@@ -187,7 +187,6 @@ function field_invoke_method_multiple($method, $target_function, array $entities
   $options += $default_options;
 
   $instances = array();
-  $grouped_entities = array();
   $grouped_items = array();
   $grouped_targets = array();
   $return = array();
@@ -224,8 +223,7 @@ function field_invoke_method_multiple($method, $target_function, array $entities
         $langcode = !empty($options['langcode'][$id]) ? $options['langcode'][$id] : $options['langcode'];
         $langcodes = _field_language_suggestion($available_langcodes, $langcode, $field_name);
         foreach ($langcodes as $langcode) {
-          // Group the entities and items corresponding to the current field.
-          $grouped_entities[$instance_id][$langcode][$id] = $entities[$id];
+          // Group the items corresponding to the current field.
           $items = $entity->getTranslation($langcode)->get($field_name);
           $items->filterEmptyValues();
           $grouped_items[$instance_id][$langcode][$id] = $items;
@@ -238,12 +236,9 @@ function field_invoke_method_multiple($method, $target_function, array $entities
 
   // For each instance, invoke the method and collect results.
   foreach ($instances as $instance_id => $instance) {
-    $field_name = $instance['field_name'];
-
     // Iterate over all the field translations.
     foreach ($grouped_items[$instance_id] as $langcode => $items) {
-      $entities = $grouped_entities[$instance_id][$langcode];
-      $results = $grouped_targets[$instance_id]->$method($entities, $langcode, $items, $a, $b);
+      $results = $grouped_targets[$instance_id]->$method($items, $a, $b);
 
       if (isset($results)) {
         // Collect results by entity.
diff --git a/core/modules/field/field.module b/core/modules/field/field.module
index cc7ad90..ebe3bf1 100644
--- a/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -701,9 +701,8 @@ function field_view_field(EntityInterface $entity, $field_name, $display_options
 
     // Invoke the formatter's prepareView() and view() methods.
     $items = $entity->getNGEntity()->getTranslation($display_langcode)->get($field_name);
-    $id = $entity->id();
-    $formatter->prepareView(array($id => $entity), $display_langcode, array($id => $items));
-    $result = $formatter->view($entity, $display_langcode, $items);
+    $formatter->prepareView(array($entity->id() => $items));
+    $result = $formatter->view($items);
 
     // Invoke hook_field_attach_view_alter() to let other modules alter the
     // renderable array, as in a full field_attach_view() execution.
diff --git a/core/modules/field/field.multilingual.inc b/core/modules/field/field.multilingual.inc
index d02595c..61c5a41 100644
--- a/core/modules/field/field.multilingual.inc
+++ b/core/modules/field/field.multilingual.inc
@@ -34,7 +34,7 @@
  * is attached to supports translation.
  *
  * By default, field_invoke_method() processes a field in all available
- * languages, unless they are given a language code suggestion. Based on that
+ * languages, unless it is given a language code suggestion. Based on that
  * suggestion, _field_language_suggestion() determines the languages to act on.
  *
  * Most field_attach_*() functions act on all available language codes, except
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigField.php b/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigField.php
index a878c1a..4d8b685 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigField.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigField.php
@@ -78,11 +78,10 @@ protected function getDefaultValue() {
    */
   public function defaultValuesForm(array &$form, array &$form_state) {
     if (empty($this->getFieldDefinition()->default_value_function)) {
-      $widget = $this->defaultValueWidget($form_state);
-
       // Place the input in a separate place in the submitted values tree.
+      $widget = $this->defaultValueWidget($form_state);
       $element = array('#parents' => array('default_value_input'));
-      $element += $widget->form($this->getEntity(), $this->getLangcode(), $this, $element, $form_state);
+      $element += $widget->form($this, $element, $form_state);
 
       return $element;
     }
@@ -92,12 +91,9 @@ public function defaultValuesForm(array &$form, array &$form_state) {
    * {@inheritdoc}
    */
   public function defaultValuesFormValidate(array $element, array &$form, array &$form_state) {
-    $entity = $this->getEntity();
-    $langcode = $this->getLangcode();
-
     // Extract the submitted value, and validate it.
     $widget = $this->defaultValueWidget($form_state);
-    $widget->extractFormValues($entity, $langcode, $this, $element, $form_state);
+    $widget->extractFormValues($this, $element, $form_state);
     $violations = $this->validate();
 
     if (count($violations)) {
@@ -108,7 +104,7 @@ public function defaultValuesFormValidate(array $element, array &$form, array &$
       field_form_set_state($element['#parents'], $field_name, $form_state, $field_state);
 
       // Assign reported errors to the correct form element.
-      $widget->flagErrors($entity, $langcode, $this, $element, $form_state);
+      $widget->flagErrors($this, $element, $form_state);
     }
   }
 
@@ -118,7 +114,7 @@ public function defaultValuesFormValidate(array $element, array &$form, array &$
   public function defaultValuesFormSubmit(array $element, array &$form, array &$form_state) {
     // Extract the submitted value, and return it as an array.
     $widget = $this->defaultValueWidget($form_state);
-    $widget->extractFormValues($this->getEntity(), $this->getLangcode(), $this, $element, $form_state);
+    $widget->extractFormValues($this, $element, $form_state);
     return $this->getValue();
   }
 
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterBase.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterBase.php
index aa93124..bb9edd3 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterBase.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterBase.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\field\Plugin\Type\Formatter;
 
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldDefinitionInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 use Drupal\field\FieldInstanceInterface;
@@ -74,11 +73,12 @@ public function __construct($plugin_id, array $plugin_definition, FieldDefinitio
   /**
    * {@inheritdoc}
    */
-  public function view(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function view(FieldInterface $items) {
     $addition = array();
 
-    $elements = $this->viewElements($entity, $langcode, $items);
+    $elements = $this->viewElements($items);
     if ($elements) {
+      $entity = $items->getEntity();
       $entity_type = $entity->entityType();
       $field_name = $this->fieldDefinition->getFieldName();
       $info = array(
@@ -87,7 +87,7 @@ public function view(EntityInterface $entity, $langcode, FieldInterface $items)
         '#access' => $this->checkFieldAccess('view', $entity),
         '#label_display' => $this->label,
         '#view_mode' => $this->viewMode,
-        '#language' => $langcode,
+        '#language' => $items->getLangcode(),
         '#field_name' => $field_name,
         '#field_type' => $this->fieldDefinition->getFieldType(),
         '#field_translatable' => $this->fieldDefinition->isFieldTranslatable(),
@@ -121,7 +121,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function prepareView(array $entities, $langcode, array $items) { }
+  public function prepareView(array $entities_items) { }
 
   /**
    * Returns whether the currently logged in user has access to the field.
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterInterface.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterInterface.php
index 70bc59a..8a38c20 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterInterface.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterInterface.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\field\Plugin\Type\Formatter;
 
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 use Drupal\field\Plugin\PluginSettingsInterface;
 
@@ -61,45 +60,33 @@ public function settingsSummary();
    * Changes or additions to field values are done by alterings the $items
    * parameter by reference.
    *
-   * @param array $entities
-   *   Array of entities being displayed, keyed by entity ID.
-   * @param string $langcode
-   *   The language the field values are to be shown in. If no language is
-   *   provided the current language is used.
-   * @param array $items
-   *   Array of field values for the entities, keyed by entity ID.
+   * @param array $entities_items
+   *   Array of field values (Drupal\Core\Entity\Field\FieldInterface), keyed by
+   *   entity ID.
    */
-  public function prepareView(array $entities, $langcode, array $items);
+  public function prepareView(array $entities_items);
 
   /**
    * Builds a renderable array for one field on one entity instance.
    *
-   * @param Drupal\Core\Entity\EntityInterface $entity
-   *   The entity being displayed.
-   * @param string $langcode
-   *   The language associated with $items.
    * @param Drupal\Core\Entity\Field\FieldInterface $items
-   *   The field value for the entity for the language.
+   *   The field values to be rendered.
    *
    * @return array
    *   A renderable array for a themed field with its label and all its values.
    */
-  public function view(EntityInterface $entity, $langcode, FieldInterface $items);
+  public function view(FieldInterface $items);
 
   /**
    * Builds a renderable array for a field value.
    *
-   * @param Drupal\Core\Entity\EntityInterface $entity
-   *   The entity being displayed.
-   * @param string $langcode
-   *   The language associated with $items.
-   * @param array $items
-   *   Array of values for this field.
+   * @param Drupal\Core\Entity\Field\FieldInterface $items
+   *   The field values to be rendered.
    *
    * @return array
    *   A renderable array for $items, as an array of child elements keyed by
    *   numeric indexes starting from 0.
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items);
+  public function viewElements(FieldInterface $items);
 
 }
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
index e6839d3..a84c94f 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
@@ -8,7 +8,6 @@
 namespace Drupal\field\Plugin\Type\Widget;
 
 use Drupal\Component\Utility\NestedArray;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldDefinitionInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 use Drupal\field\FieldInstanceInterface;
@@ -56,7 +55,7 @@ public function __construct($plugin_id, array $plugin_definition, FieldDefinitio
   /**
    * {@inheritdoc}
    */
-  public function form(EntityInterface $entity, $langcode, FieldInterface $items, array &$form, array &$form_state, $get_delta = NULL) {
+  public function form(FieldInterface $items, array &$form, array &$form_state, $get_delta = NULL) {
     $field_name = $this->fieldDefinition->getFieldName();
     $parents = $form['#parents'];
 
@@ -83,7 +82,7 @@ public function form(EntityInterface $entity, $langcode, FieldInterface $items,
         '#title' => check_plain($this->fieldDefinition->getFieldLabel()),
         '#description' => field_filter_xss(\Drupal::token()->replace($this->fieldDefinition->getFieldDescription())),
       );
-      $element = $this->formSingleElement($entity, $items, $delta, $langcode, $element, $form, $form_state);
+      $element = $this->formSingleElement($items, $delta, $element, $form, $form_state);
 
       if ($element) {
         if (isset($get_delta)) {
@@ -102,7 +101,7 @@ public function form(EntityInterface $entity, $langcode, FieldInterface $items,
     // If the widget does not handle multiple values itself, (and we are not
     // displaying an individual element), process the multiple value form.
     else {
-      $elements = $this->formMultipleElements($entity, $items, $langcode, $form, $form_state);
+      $elements = $this->formMultipleElements($items, $form, $form_state);
     }
 
     // Populate the 'array_parents' information in $form_state['field'] after
@@ -110,8 +109,6 @@ public function form(EntityInterface $entity, $langcode, FieldInterface $items,
     // in alter() hooks.
     $elements['#after_build'][] = 'field_form_element_after_build';
     $elements['#field_name'] = $field_name;
-    // @todo Not strictly needed anymore.
-    $elements['#language'] = $langcode;
     $elements['#field_parents'] = $parents;
     // Enforce the structure of submitted values.
     $elements['#parents'] = array_merge($parents, array($field_name));
@@ -131,7 +128,7 @@ public function form(EntityInterface $entity, $langcode, FieldInterface $items,
             'field-widget-' . drupal_html_class($this->getPluginId()),
           ),
         ),
-        '#access' => $this->checkFieldAccess('edit', $entity),
+        '#access' => $this->checkFieldAccess('edit', $items->getEntity()),
         'widget' => $elements,
       ),
     );
@@ -147,7 +144,7 @@ public function form(EntityInterface $entity, $langcode, FieldInterface $items,
    * - AHAH-'add more' button
    * - table display and drag-n-drop value reordering
    */
-  protected function formMultipleElements(EntityInterface $entity, FieldInterface $items, $langcode, array &$form, array &$form_state) {
+  protected function formMultipleElements(FieldInterface $items, array &$form, array &$form_state) {
     $field_name = $this->fieldDefinition->getFieldName();
     $cardinality = $this->fieldDefinition->getFieldCardinality();
     $parents = $form['#parents'];
@@ -181,7 +178,7 @@ protected function formMultipleElements(EntityInterface $entity, FieldInterface
         '#title' => $is_multiple ? '' : $title,
         '#description' => $is_multiple ? '' : $description,
       );
-      $element = $this->formSingleElement($entity, $items, $delta, $langcode, $element, $form, $form_state);
+      $element = $this->formSingleElement($items, $delta, $element, $form, $form_state);
 
       if ($element) {
         // Input field for the delta (drag-n-drop reordering).
@@ -223,7 +220,7 @@ protected function formMultipleElements(EntityInterface $entity, FieldInterface
           '#name' => strtr($id_prefix, '-', '_') . '_add_more',
           '#value' => t('Add another item'),
           '#attributes' => array('class' => array('field-add-more-submit')),
-          '#limit_validation_errors' => array(array_merge($parents, array($field_name, $langcode))),
+          '#limit_validation_errors' => array(array_merge($parents, array($field_name))),
           '#submit' => array('field_add_more_submit'),
           '#ajax' => array(
               'callback' => 'field_add_more_js',
@@ -240,13 +237,15 @@ protected function formMultipleElements(EntityInterface $entity, FieldInterface
   /**
    * Generates the form element for a single copy of the widget.
    */
-  protected function formSingleElement(EntityInterface $entity, FieldInterface $items, $delta, $langcode, array $element, array &$form, array &$form_state) {
+  protected function formSingleElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
+    $entity = $items->getEntity();
+
     $element += array(
       '#entity_type' => $entity->entityType(),
       '#bundle' => $entity->bundle(),
       '#entity' => $entity,
       '#field_name' => $this->fieldDefinition->getFieldName(),
-      '#language' => $langcode,
+      '#language' => $items->getLangcode(),
       '#field_parents' => $form['#parents'],
       // Only the first widget should be required.
       '#required' => $delta == 0 && $this->fieldDefinition->isFieldRequired(),
@@ -254,16 +253,13 @@ protected function formSingleElement(EntityInterface $entity, FieldInterface $it
       '#weight' => $delta,
     );
 
-    $element = $this->formElement($items, $delta, $element, $langcode, $form, $form_state);
+    $element = $this->formElement($items, $delta, $element, $form, $form_state);
 
     if ($element) {
       // Allow modules to alter the field widget form element.
       $context = array(
         'form' => $form,
         'widget' => $this,
-        'field_definition' => $this->fieldDefinition,
-        'entity' => $entity,
-        'langcode' => $langcode,
         'items' => $items,
         'delta' => $delta,
         'default' => !empty($entity->field_ui_default_value),
@@ -277,7 +273,7 @@ protected function formSingleElement(EntityInterface $entity, FieldInterface $it
   /**
    * {@inheritdoc}
    */
-  public function extractFormValues(EntityInterface $entity, $langcode, FieldInterface $items, array $form, array &$form_state) {
+  public function extractFormValues(FieldInterface $items, array $form, array &$form_state) {
     $field_name = $this->fieldDefinition->getFieldName();
 
     // Extract the values from $form_state['values'].
@@ -330,7 +326,7 @@ public function extractFormValues(EntityInterface $entity, $langcode, FieldInter
   /**
    * {@inheritdoc}
    */
-  public function flagErrors(EntityInterface $entity, $langcode, FieldInterface $items, array $form, array &$form_state) {
+  public function flagErrors(FieldInterface $items, array $form, array &$form_state) {
     $field_name = $this->fieldDefinition->getFieldName();
 
     $field_state = field_form_get_state($form['#parents'], $field_name, $form_state);
@@ -409,7 +405,7 @@ public function massageFormValues(array $values, array $form, array &$form_state
   /**
    * Sorts submitted field values according to drag-n-drop reordering.
    *
-   * @param FieldInterface $items
+   * @param \Drupal\Core\Entity\Field\FieldInterface $items
    *   The field values.
    */
   protected function sortItems(FieldInterface $items) {
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBaseInterface.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBaseInterface.php
index ac8c60b..d5cd015 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBaseInterface.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBaseInterface.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\field\Plugin\Type\Widget;
 
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 use Drupal\field\Plugin\PluginSettingsInterface;
 
@@ -28,11 +27,7 @@
    * TRUE), the 'default value', if any, is pre-populated. Also allows other
    * modules to alter the form element by implementing their own hooks.
    *
-   * @param Drupal\Core\Entity\EntityInterface $entity
-   *   The entity for which the widget is being built.
-   * @param string $langcode
-   *   The language associated with the field.
-   * @param FieldInterface $items
+   * @param \Drupal\Core\Entity\Field\FieldInterface $items
    *   An array of the field values. When creating a new entity this may be NULL
    *   or an empty array to use default values.
    * @param array $form
@@ -46,16 +41,12 @@
    * @return array
    *   The form element array created for this field.
    */
-  public function form(EntityInterface $entity, $langcode, FieldInterface $items, array &$form, array &$form_state, $get_delta = NULL);
+  public function form(FieldInterface $items, array &$form, array &$form_state, $get_delta = NULL);
 
   /**
    * Extracts field values from submitted form values.
    *
-   * @param Drupal\Core\Entity\EntityInterface $entity
-   *   The entity for which the widget is being submitted.
-   * @param string $langcode
-   *   The language associated to $items.
-   * @param FieldInterface $items
+   * @param \Drupal\Core\Entity\Field\FieldInterface $items
    *   The field values. This parameter is altered by reference to receive the
    *   incoming form values.
    * @param array $form
@@ -64,16 +55,12 @@ public function form(EntityInterface $entity, $langcode, FieldInterface $items,
    * @param array $form_state
    *   The form state.
    */
-  public function extractFormValues(EntityInterface $entity, $langcode, FieldInterface $items, array $form, array &$form_state);
+  public function extractFormValues(FieldInterface $items, array $form, array &$form_state);
 
   /**
    * Reports field-level validation errors against actual form elements.
    *
-   * @param Drupal\Core\Entity\EntityInterface $entity
-   *   The entity for which the widget is being submitted.
-   * @param string $langcode
-   *   The language associated to $items.
-   * @param FieldInterface $items
+   * @param \Drupal\Core\Entity\Field\FieldInterface $items
    *   The field values.
    * @param array $form
    *   The form structure where field elements are attached to. This might be a
@@ -81,6 +68,6 @@ public function extractFormValues(EntityInterface $entity, $langcode, FieldInter
    * @param array $form_state
    *   The form state.
    */
-  public function flagErrors(EntityInterface $entity, $langcode, FieldInterface $items, array $form, array &$form_state);
+  public function flagErrors(FieldInterface $items, array $form, array &$form_state);
 
 }
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetInterface.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetInterface.php
index e27484e..a64915c 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetInterface.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetInterface.php
@@ -7,8 +7,6 @@
 
 namespace Drupal\field\Plugin\Type\Widget;
 
-use Drupal\Core\Entity\EntityInterface;
-use Drupal\field\Entity\FieldInstance;
 use Symfony\Component\Validator\ConstraintViolationInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 
@@ -75,7 +73,7 @@ public function settingsSummary();
    * definition and set them as ad-hoc $element['#custom'] properties, for later
    * use by its element callbacks.
    *
-   * @param FieldInterface $items
+   * @param \Drupal\Core\Entity\Field\FieldInterface $items
    *   Array of default values for this field.
    * @param int $delta
    *   The order of this item in the array of subelements (0, 1, 2, etc).
@@ -101,8 +99,6 @@ public function settingsSummary();
    *     required.
    *   - #delta: The order of this item in the array of subelements; see $delta
    *     above.
-   * @param string $langcode
-   *   The language associated with $items.
    * @param string $form
    *   The form structure where widgets are being attached to. This might be a
    *   full form structure, or a sub-element of a larger form.
@@ -115,7 +111,7 @@ public function settingsSummary();
    * @see hook_field_widget_form_alter()
    * @see hook_field_widget_WIDGET_TYPE_form_alter()
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state);
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state);
 
   /**
    * Assigns a field-level validation error to the right widget sub-element.
diff --git a/core/modules/field/lib/Drupal/field/Plugin/field/widget/HiddenWidget.php b/core/modules/field/lib/Drupal/field/Plugin/field/widget/HiddenWidget.php
index 78e6010..33d7b76 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/field/widget/HiddenWidget.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/field/widget/HiddenWidget.php
@@ -27,7 +27,7 @@ class HiddenWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     // The purpose of this widget is to be hidden, so nothing to do here.
     return array();
   }
diff --git a/core/modules/field/lib/Drupal/field/Tests/TranslationWebTest.php b/core/modules/field/lib/Drupal/field/Tests/TranslationWebTest.php
index ab68527..6250a95 100644
--- a/core/modules/field/lib/Drupal/field/Tests/TranslationWebTest.php
+++ b/core/modules/field/lib/Drupal/field/Tests/TranslationWebTest.php
@@ -116,7 +116,6 @@ function testFieldFormTranslationRevisions() {
     $entity->save();
 
     // Create a new revision.
-    $langcode = $entity->language()->id;
     $edit = array(
       'user_id' => 1,
       'name' => $this->randomName(),
diff --git a/core/modules/field/tests/modules/field_test/field_test.module b/core/modules/field/tests/modules/field_test/field_test.module
index 3ab0c7e..2d841f6 100644
--- a/core/modules/field/tests/modules/field_test/field_test.module
+++ b/core/modules/field/tests/modules/field_test/field_test.module
@@ -153,7 +153,8 @@ function field_test_field_attach_view_alter(&$output, $context) {
  * Implements hook_field_widget_form_alter().
  */
 function field_test_field_widget_form_alter(&$element, &$form_state, $context) {
-  switch ($context['field_definition']->getFieldName()) {
+  $field_definition = $context['items']->getFieldDefinition();
+  switch ($field_definition->getFieldName()) {
     case 'alter_test_text':
       drupal_set_message('Field size: ' . $context['widget']->getSetting('size'));
       break;
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldDefaultFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldDefaultFormatter.php
index a54b2c3..c864374 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldDefaultFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldDefaultFormatter.php
@@ -56,7 +56,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldEmptyFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldEmptyFormatter.php
index 2d59dcd..70250e1 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldEmptyFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldEmptyFormatter.php
@@ -9,7 +9,6 @@
 
 use Drupal\field\Annotation\FieldFormatter;
 use Drupal\Core\Annotation\Translation;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 use Drupal\field\Plugin\Type\Formatter\FormatterBase;
 
@@ -32,7 +31,7 @@ class TestFieldEmptyFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     if ($items->isEmpty()) {
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldMultipleFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldMultipleFormatter.php
index 5b0b63b..bd23716 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldMultipleFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldMultipleFormatter.php
@@ -56,7 +56,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     if (!empty($items)) {
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldPrepareViewFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldPrepareViewFormatter.php
index 946797a..c89bc94 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldPrepareViewFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldPrepareViewFormatter.php
@@ -10,7 +10,6 @@
 use Drupal\field\Annotation\FieldFormatter;
 use Drupal\Core\Annotation\Translation;
 use Drupal\field\Plugin\Type\Formatter\FormatterBase;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 
 /**
@@ -56,9 +55,9 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function prepareView(array $entities, $langcode, array $items) {
-    foreach ($entities as $id => $entity) {
-      foreach ($items[$id] as $delta => $item) {
+  public function prepareView(array $entities_items) {
+    foreach ($entities_items as $items) {
+      foreach ($items as $item) {
         // Don't add anything on empty values.
         if (!$item->isEmpty()) {
           $item->additional_formatter_value = $item->value + 1;
@@ -70,7 +69,7 @@ public function prepareView(array $entities, $langcode, array $items) {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidget.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidget.php
index ff3c593..4cfb1a2 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidget.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidget.php
@@ -56,7 +56,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $element += array(
       '#type' => 'textfield',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : '',
diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidgetMultiple.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidgetMultiple.php
index 86d7dde..a937290 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidgetMultiple.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/widget/TestFieldWidgetMultiple.php
@@ -58,7 +58,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $values = array();
     foreach ($items as $delta => $item) {
       $values[] = $item->value;
diff --git a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/FileFormatterBase.php b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/FileFormatterBase.php
index 08325cf..dfe4a7a 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/FileFormatterBase.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/FileFormatterBase.php
@@ -17,11 +17,11 @@
   /**
    * {@inheritdoc}
    */
-  public function prepareView(array $entities, $langcode, array $items) {
+  public function prepareView(array $entities_items) {
     // Remove files specified to not be displayed.
     $fids = array();
-    foreach ($entities as $id => $entity) {
-      foreach ($items[$id] as $item) {
+    foreach ($entities_items as $items) {
+      foreach ($items as $item) {
         if ($this->isDisplayed($item) && !empty($item->target_id)) {
           // Load the files from the files table.
           $fids[] = $item->target_id;
@@ -32,8 +32,8 @@ public function prepareView(array $entities, $langcode, array $items) {
     if ($fids) {
       $files = file_load_multiple($fids);
 
-      foreach ($entities as $id => $entity) {
-        foreach ($items[$id] as $item) {
+      foreach ($entities_items as $items) {
+        foreach ($items as $item) {
           // If the file does not exist, mark the entire item as empty.
           if (!empty($item->target_id)) {
             $item->entity = isset($files[$item->target_id]) ? $files[$item->target_id] : NULL;
diff --git a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/GenericFileFormatter.php b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/GenericFileFormatter.php
index abf6e92..362ab24 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/GenericFileFormatter.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/GenericFileFormatter.php
@@ -28,7 +28,7 @@ class GenericFileFormatter extends FileFormatterBase {
   /**
    * Implements \Drupal\field\Plugin\Type\Formatter\FormatterInterface::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/RSSEnclosureFormatter.php b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/RSSEnclosureFormatter.php
index d18234f..a9a145e 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/RSSEnclosureFormatter.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/RSSEnclosureFormatter.php
@@ -28,8 +28,8 @@ class RSSEnclosureFormatter extends FileFormatterBase {
   /**
    * Implements \Drupal\field\Plugin\Type\Formatter\FormatterInterface::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
-
+  public function viewElements(FieldInterface $items) {
+    $entity = $items->getEntity();
     // Add the first file as an enclosure to the RSS item. RSS allows only one
     // enclosure per item. See: http://en.wikipedia.org/wiki/RSS_enclosure
     foreach ($items as $item) {
diff --git a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/TableFormatter.php b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/TableFormatter.php
index dfe8f43..494b944 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/TableFormatter.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/TableFormatter.php
@@ -28,7 +28,7 @@ class TableFormatter extends FileFormatterBase {
   /**
    * Implements \Drupal\field\Plugin\Type\Formatter\FormatterInterface::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     if (!$items->isEmpty()) {
diff --git a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/UrlPlainFormatter.php b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/UrlPlainFormatter.php
index 9138a07..72d6d15 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/field/formatter/UrlPlainFormatter.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/field/formatter/UrlPlainFormatter.php
@@ -28,7 +28,7 @@ class UrlPlainFormatter extends FileFormatterBase {
   /**
    * Implements \Drupal\field\Plugin\Type\Formatter\FormatterInterface::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php b/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php
index 376b5c9..091b4c7 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php
@@ -10,7 +10,6 @@
 use Drupal\field\Annotation\FieldWidget;
 use Drupal\Core\Annotation\Translation;
 use Drupal\field\Plugin\Type\Widget\WidgetBase;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 
 /**
@@ -62,9 +61,8 @@ public function settingsSummary() {
    *
    * Special handling for draggable multiple widgets and 'add more' button.
    */
-  protected function formMultipleElements(EntityInterface $entity, FieldInterface $items, $langcode, array &$form, array &$form_state) {
+  protected function formMultipleElements(FieldInterface $items, array &$form, array &$form_state) {
     $field_name = $this->fieldDefinition->getFieldName();
-
     $parents = $form['#parents'];
 
     // Load the items for form rebuilds from the field state as they might not be
@@ -101,7 +99,7 @@ protected function formMultipleElements(EntityInterface $entity, FieldInterface
         '#title' => $title,
         '#description' => $description,
       );
-      $element = $this->formSingleElement($entity, $items, $delta, $langcode, $element, $form, $form_state);
+      $element = $this->formSingleElement($items, $delta, $element, $form, $form_state);
 
       if ($element) {
         // Input field for the delta (drag-n-drop reordering).
@@ -134,7 +132,7 @@ protected function formMultipleElements(EntityInterface $entity, FieldInterface
         '#title' => $title,
         '#description' => $description,
       );
-      $element = $this->formSingleElement($entity, $items, $delta, $langcode, $element, $form, $form_state);
+      $element = $this->formSingleElement($items, $delta, $element, $form, $form_state);
       if ($element) {
         $element['#required'] = ($element['#required'] && $delta == 0);
         $elements[$delta] = $element;
@@ -174,7 +172,7 @@ protected function formMultipleElements(EntityInterface $entity, FieldInterface
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $field_settings = $this->getFieldSettings();
 
     // The field settings include defaults for the field type. However, this
diff --git a/core/modules/image/lib/Drupal/image/Plugin/field/formatter/ImageFormatter.php b/core/modules/image/lib/Drupal/image/Plugin/field/formatter/ImageFormatter.php
index 32c82ad..a2cbb52 100644
--- a/core/modules/image/lib/Drupal/image/Plugin/field/formatter/ImageFormatter.php
+++ b/core/modules/image/lib/Drupal/image/Plugin/field/formatter/ImageFormatter.php
@@ -92,13 +92,13 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     $image_link_setting = $this->getSetting('image_link');
     // Check if the formatter involves a link.
     if ($image_link_setting == 'content') {
-      $uri = $entity->uri();
+      $uri = $items->getEntity()->uri();
     }
     elseif ($image_link_setting == 'file') {
       $link_file = TRUE;
diff --git a/core/modules/image/lib/Drupal/image/Plugin/field/formatter/ImageFormatterBase.php b/core/modules/image/lib/Drupal/image/Plugin/field/formatter/ImageFormatterBase.php
index 0ed0be4..03d2727 100644
--- a/core/modules/image/lib/Drupal/image/Plugin/field/formatter/ImageFormatterBase.php
+++ b/core/modules/image/lib/Drupal/image/Plugin/field/formatter/ImageFormatterBase.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\image\Plugin\field\formatter;
 
+use Drupal\field\FieldInstanceInterface;
 use Drupal\file\Plugin\field\formatter\FileFormatterBase;
 
 /**
@@ -17,28 +18,22 @@
   /**
    * {@inheritdoc}
    */
-  public function prepareView(array $entities, $langcode, array $items) {
-    parent::prepareView($entities, $langcode, $items);
+  public function prepareView(array $entities_items) {
+    parent::prepareView($entities_items);
 
     // If there are no files specified at all, use the default.
-    foreach ($entities as $id => $entity) {
-      if ($items[$id]->isEmpty()) {
-        $fid = array();
-        $instance = field_info_instance($entity->entityType(), $this->fieldDefinition->getFieldName(), $entity->bundle());
-        // Use the default for the instance if one is available.
-        if (!empty($instance['settings']['default_image'])) {
-          $fid = array($instance['settings']['default_image']);
-        }
-        // Otherwise, use the default for the field.
-        // Note, that we have to bypass getFieldSetting() as this returns the
-        // instance-setting default.
-        elseif (($field = $this->fieldDefinition->getField()) && !empty($field->settings['default_image'])) {
-          $fid = array($field->settings['default_image']);
+    foreach ($entities_items as $items) {
+      if ($items->isEmpty()) {
+        // Add the default image if one is found.
+        $fid = $this->getFieldSetting('default_image');
+        // If we are dealing with a configurable field, look in both
+        // instance-level and field-level settings.
+        if (empty($fid) && $this->fieldDefinition instanceof FieldInstanceInterface) {
+          $fid = $this->fieldDefinition->getField()->getFieldSetting('default_image');
         }
 
-        // Add the default image if one is found.
-        if ($fid && ($file = file_load($fid[0]))) {
-          $items[$id]->setValue(array(array(
+        if ($fid && ($file = file_load($fid))) {
+          $items->setValue(array(array(
             'is_default' => TRUE,
             'alt' => '',
             'title' => '',
diff --git a/core/modules/image/lib/Drupal/image/Plugin/field/widget/ImageWidget.php b/core/modules/image/lib/Drupal/image/Plugin/field/widget/ImageWidget.php
index 82cb4ad..99c1eca 100644
--- a/core/modules/image/lib/Drupal/image/Plugin/field/widget/ImageWidget.php
+++ b/core/modules/image/lib/Drupal/image/Plugin/field/widget/ImageWidget.php
@@ -10,7 +10,6 @@
 use Drupal\field\Annotation\FieldWidget;
 use Drupal\Core\Annotation\Translation;
 use Drupal\file\Plugin\field\widget\FileWidget;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\Field\FieldInterface;
 
 /**
@@ -78,8 +77,8 @@ public function settingsSummary() {
    *
    * Special handling for draggable multiple widgets and 'add more' button.
    */
-  protected function formMultipleElements(EntityInterface $entity, FieldInterface $items, $langcode, array &$form, array &$form_state) {
-    $elements = parent::formMultipleElements($entity, $items, $langcode, $form, $form_state);
+  protected function formMultipleElements(FieldInterface $items, array &$form, array &$form_state) {
+    $elements = parent::formMultipleElements($items, $form, $form_state);
 
     $cardinality = $this->fieldDefinition->getFieldCardinality();
     $file_upload_help = array(
@@ -104,8 +103,8 @@ protected function formMultipleElements(EntityInterface $entity, FieldInterface
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
-    $element = parent::formElement($items, $delta, $element, $langcode, $form, $form_state);
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
+    $element = parent::formElement($items, $delta, $element, $form, $form_state);
 
     $field_settings = $this->getFieldSettings();
 
diff --git a/core/modules/link/lib/Drupal/link/Plugin/field/formatter/LinkFormatter.php b/core/modules/link/lib/Drupal/link/Plugin/field/formatter/LinkFormatter.php
index 29e7eb9..143f149 100644
--- a/core/modules/link/lib/Drupal/link/Plugin/field/formatter/LinkFormatter.php
+++ b/core/modules/link/lib/Drupal/link/Plugin/field/formatter/LinkFormatter.php
@@ -117,8 +117,9 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $element = array();
+    $entity = $items->getEntity();
     $settings = $this->getSettings();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/link/lib/Drupal/link/Plugin/field/formatter/LinkSeparateFormatter.php b/core/modules/link/lib/Drupal/link/Plugin/field/formatter/LinkSeparateFormatter.php
index f249bbe..9f22b97 100644
--- a/core/modules/link/lib/Drupal/link/Plugin/field/formatter/LinkSeparateFormatter.php
+++ b/core/modules/link/lib/Drupal/link/Plugin/field/formatter/LinkSeparateFormatter.php
@@ -38,8 +38,9 @@ class LinkSeparateFormatter extends LinkFormatter {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $element = array();
+    $entity = $items->getEntity();
     $settings = $this->getSettings();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/link/lib/Drupal/link/Plugin/field/widget/LinkWidget.php b/core/modules/link/lib/Drupal/link/Plugin/field/widget/LinkWidget.php
index fc37e35..03b9c4d 100644
--- a/core/modules/link/lib/Drupal/link/Plugin/field/widget/LinkWidget.php
+++ b/core/modules/link/lib/Drupal/link/Plugin/field/widget/LinkWidget.php
@@ -32,7 +32,7 @@ class LinkWidget extends WidgetBase {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $element['url'] = array(
       '#type' => 'url',
       '#title' => t('URL'),
diff --git a/core/modules/number/lib/Drupal/number/Plugin/field/formatter/DefaultNumberFormatter.php b/core/modules/number/lib/Drupal/number/Plugin/field/formatter/DefaultNumberFormatter.php
index c639a25..cfd81b3 100644
--- a/core/modules/number/lib/Drupal/number/Plugin/field/formatter/DefaultNumberFormatter.php
+++ b/core/modules/number/lib/Drupal/number/Plugin/field/formatter/DefaultNumberFormatter.php
@@ -65,7 +65,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
     $settings = $this->getFieldSettings();
 
diff --git a/core/modules/number/lib/Drupal/number/Plugin/field/formatter/NumberUnformattedFormatter.php b/core/modules/number/lib/Drupal/number/Plugin/field/formatter/NumberUnformattedFormatter.php
index 75b6d6d..dc7c6bf 100644
--- a/core/modules/number/lib/Drupal/number/Plugin/field/formatter/NumberUnformattedFormatter.php
+++ b/core/modules/number/lib/Drupal/number/Plugin/field/formatter/NumberUnformattedFormatter.php
@@ -31,7 +31,7 @@ class NumberUnformattedFormatter extends FormatterBase {
   /**
    * Implements Drupal\field\Plugin\Type\Formatter\FormatterInterface::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/number/lib/Drupal/number/Plugin/field/widget/NumberWidget.php b/core/modules/number/lib/Drupal/number/Plugin/field/widget/NumberWidget.php
index c27909e..4dc9d21 100644
--- a/core/modules/number/lib/Drupal/number/Plugin/field/widget/NumberWidget.php
+++ b/core/modules/number/lib/Drupal/number/Plugin/field/widget/NumberWidget.php
@@ -64,7 +64,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $value = isset($items[$delta]->value) ? $items[$delta]->value : NULL;
     $field_settings = $this->getFieldSettings();
 
diff --git a/core/modules/options/lib/Drupal/options/Plugin/field/formatter/OptionsDefaultFormatter.php b/core/modules/options/lib/Drupal/options/Plugin/field/formatter/OptionsDefaultFormatter.php
index 312a164..f18f502 100644
--- a/core/modules/options/lib/Drupal/options/Plugin/field/formatter/OptionsDefaultFormatter.php
+++ b/core/modules/options/lib/Drupal/options/Plugin/field/formatter/OptionsDefaultFormatter.php
@@ -32,9 +32,10 @@ class OptionsDefaultFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
+    $entity = $items->getEntity();
     $allowed_values = options_allowed_values($this->fieldDefinition, $entity);
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/options/lib/Drupal/options/Plugin/field/formatter/OptionsKeyFormatter.php b/core/modules/options/lib/Drupal/options/Plugin/field/formatter/OptionsKeyFormatter.php
index af0fff1..06a6d27 100644
--- a/core/modules/options/lib/Drupal/options/Plugin/field/formatter/OptionsKeyFormatter.php
+++ b/core/modules/options/lib/Drupal/options/Plugin/field/formatter/OptionsKeyFormatter.php
@@ -32,7 +32,7 @@ class OptionsKeyFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/options/lib/Drupal/options/Plugin/field/widget/ButtonsWidget.php b/core/modules/options/lib/Drupal/options/Plugin/field/widget/ButtonsWidget.php
index bee3e3b..2077e9c 100644
--- a/core/modules/options/lib/Drupal/options/Plugin/field/widget/ButtonsWidget.php
+++ b/core/modules/options/lib/Drupal/options/Plugin/field/widget/ButtonsWidget.php
@@ -31,8 +31,8 @@ class ButtonsWidget extends OptionsWidgetBase {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
-    $element = parent::formElement($items, $delta, $element, $langcode, $form, $form_state);
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
+    $element = parent::formElement($items, $delta, $element, $form, $form_state);
 
     $options = $this->getOptions($items[$delta]);
     $selected = $this->getSelectedOptions($items);
diff --git a/core/modules/options/lib/Drupal/options/Plugin/field/widget/OnOffWidget.php b/core/modules/options/lib/Drupal/options/Plugin/field/widget/OnOffWidget.php
index 50cc08a..a7a94d9 100644
--- a/core/modules/options/lib/Drupal/options/Plugin/field/widget/OnOffWidget.php
+++ b/core/modules/options/lib/Drupal/options/Plugin/field/widget/OnOffWidget.php
@@ -56,8 +56,8 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
-    $element = parent::formElement($items, $delta, $element, $langcode, $form, $form_state);
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
+    $element = parent::formElement($items, $delta, $element, $form, $form_state);
 
     $options = $this->getOptions($items[$delta]);
     $selected = $this->getSelectedOptions($items);
diff --git a/core/modules/options/lib/Drupal/options/Plugin/field/widget/OptionsWidgetBase.php b/core/modules/options/lib/Drupal/options/Plugin/field/widget/OptionsWidgetBase.php
index 5081195..b9e1559 100644
--- a/core/modules/options/lib/Drupal/options/Plugin/field/widget/OptionsWidgetBase.php
+++ b/core/modules/options/lib/Drupal/options/Plugin/field/widget/OptionsWidgetBase.php
@@ -54,7 +54,7 @@ public function __construct($plugin_id, array $plugin_definition, FieldDefinitio
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     // Prepare some properties for the child methods to build the actual form
     // element.
     $this->required = $element['#required'];
@@ -163,7 +163,7 @@ protected function getOptions(FieldItemInterface $item) {
   /**
    * Determines selected options from the incoming field values.
    *
-   * @param FieldInterface $items
+   * @param \Drupal\Core\Entity\Field\FieldInterface $items
    *   The field values.
    * @param int $delta
    *   (optional) The delta of the item to get options for. Defaults to 0.
diff --git a/core/modules/options/lib/Drupal/options/Plugin/field/widget/SelectWidget.php b/core/modules/options/lib/Drupal/options/Plugin/field/widget/SelectWidget.php
index 26fcbaf..a7c64ea 100644
--- a/core/modules/options/lib/Drupal/options/Plugin/field/widget/SelectWidget.php
+++ b/core/modules/options/lib/Drupal/options/Plugin/field/widget/SelectWidget.php
@@ -30,8 +30,8 @@ class SelectWidget extends OptionsWidgetBase {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
-    $element = parent::formElement($items, $delta, $element, $langcode, $form, $form_state);
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
+    $element = parent::formElement($items, $delta, $element, $form, $form_state);
 
     $element += array(
       '#type' => 'select',
diff --git a/core/modules/picture/lib/Drupal/picture/Plugin/field/formatter/PictureFormatter.php b/core/modules/picture/lib/Drupal/picture/Plugin/field/formatter/PictureFormatter.php
index 9cfe0a8..2598921 100644
--- a/core/modules/picture/lib/Drupal/picture/Plugin/field/formatter/PictureFormatter.php
+++ b/core/modules/picture/lib/Drupal/picture/Plugin/field/formatter/PictureFormatter.php
@@ -115,11 +115,11 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
     // Check if the formatter involves a link.
     if ($this->getSetting('image_link') == 'content') {
-      $uri = $entity->uri();
+      $uri = $items->getEntity()->uri();
     }
     elseif ($this->getSetting('image_link') == 'file') {
       $link_file = TRUE;
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/EntityReferenceTaxonomyTermRssFormatter.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/EntityReferenceTaxonomyTermRssFormatter.php
index cf306ad..38cce22 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/EntityReferenceTaxonomyTermRssFormatter.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/EntityReferenceTaxonomyTermRssFormatter.php
@@ -32,8 +32,9 @@ class EntityReferenceTaxonomyTermRssFormatter extends EntityReferenceFormatterBa
   /**
    * Overrides Drupal\entity_reference\Plugin\field\formatter\EntityReferenceFormatterBase::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
+    $entity = $items->getEntity();
 
     foreach ($items as $item) {
       $entity->rss_elements[] = array(
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/LinkFormatter.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/LinkFormatter.php
index 6ce9e53..3861f38 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/LinkFormatter.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/LinkFormatter.php
@@ -30,7 +30,7 @@ class LinkFormatter extends TaxonomyFormatterBase {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     // Terms without target_id do not exist yet, theme such terms as just their
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/PlainFormatter.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/PlainFormatter.php
index 36de426..2c76bfd 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/PlainFormatter.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/PlainFormatter.php
@@ -29,7 +29,7 @@ class PlainFormatter extends TaxonomyFormatterBase {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/RSSCategoryFormatter.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/RSSCategoryFormatter.php
index 69b0f2b..41d2e0a 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/RSSCategoryFormatter.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/RSSCategoryFormatter.php
@@ -29,7 +29,9 @@ class RSSCategoryFormatter extends TaxonomyFormatterBase {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
+    $entity = $items->getEntity();
+
     // Terms whose target_id is 'autocreate' do not exist yet and
     // $item->entity is not set. Theme such terms as just their name.
     foreach ($items as $item) {
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/TaxonomyFormatterBase.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/TaxonomyFormatterBase.php
index a0ed35f..475e4b6 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/TaxonomyFormatterBase.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/formatter/TaxonomyFormatterBase.php
@@ -24,12 +24,12 @@
    * This preloads all taxonomy terms for multiple loaded objects at once and
    * unsets values for invalid terms that do not exist.
    */
-  public function prepareView(array $entities, $langcode, array $items) {
+  public function prepareView(array $entities_items) {
     $tids = array();
 
     // Collect every possible term attached to any of the fieldable entities.
-    foreach ($entities as $id => $entity) {
-      foreach ($items[$id] as $delta => $item) {
+    foreach ($entities_items as $items) {
+      foreach ($items as $item) {
         // Force the array key to prevent duplicates.
         if ($item->target_id !== 0) {
           $tids[$item->target_id] = $item->target_id;
@@ -41,15 +41,15 @@ public function prepareView(array $entities, $langcode, array $items) {
 
       // Iterate through the fieldable entities again to attach the loaded term
       // data.
-      foreach ($entities as $id => $entity) {
+      foreach ($entities_items as $items) {
         $rekey = FALSE;
 
-        foreach ($items[$id] as $delta => $item) {
+        foreach ($items as $item) {
           // Check whether the taxonomy term field instance value could be
           // loaded.
           if (isset($terms[$item->target_id])) {
             // Replace the instance value with the term data.
-            $items[$id][$delta]->entity = $terms[$item->target_id];
+            $item->entity = $terms[$item->target_id];
           }
           // Terms to be created are not in $terms, but are still legitimate.
           elseif ($item->target_id === 0 && isset($item->entity)) {
@@ -57,14 +57,15 @@ public function prepareView(array $entities, $langcode, array $items) {
           }
           // Otherwise, unset the instance value, since the term does not exist.
           else {
-            unset($items[$id][$delta]);
+            $item->setValue(NULL);
             $rekey = TRUE;
           }
         }
 
+        // Rekey the items array if needed.
         if ($rekey) {
-          // Rekey the items array.
-          $items[$id]->setValue(array_values($items[$id]->getValue()));
+          $items->filterEmptyValues();
+          debug($items->getValue());
         }
       }
     }
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php
index 21a3a2c..1dad812 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/field/widget/TaxonomyAutocompleteWidget.php
@@ -65,7 +65,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $tags = array();
     foreach ($items as $item) {
       $tags[$item->target_id] = isset($item->taxonomy_term) ? $item->taxonomy_term : entity_load('taxonomy_term', $item->target_id);
diff --git a/core/modules/telephone/lib/Drupal/telephone/Plugin/field/formatter/TelephoneLinkFormatter.php b/core/modules/telephone/lib/Drupal/telephone/Plugin/field/formatter/TelephoneLinkFormatter.php
index d922984..2998610 100644
--- a/core/modules/telephone/lib/Drupal/telephone/Plugin/field/formatter/TelephoneLinkFormatter.php
+++ b/core/modules/telephone/lib/Drupal/telephone/Plugin/field/formatter/TelephoneLinkFormatter.php
@@ -62,38 +62,19 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function prepareView(array $entities, $langcode, array $items) {
-    $settings = $this->getSettings();
-
-    foreach ($entities as $id => $entity) {
-      foreach ($items[$id] as $item) {
-        // If available, set custom link text.
-        if (!empty($settings['title'])) {
-          $item->title = $settings['title'];
-        }
-        // Otherwise, use telephone number itself as title.
-        else {
-          $item->title = $item->value;
-        }
-      }
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $element = array();
+    $title_setting = $this->getSetting('title');
 
     foreach ($items as $delta => $item) {
-      // Prepend 'tel:' to the telephone number.
-      $href = 'tel:' . rawurlencode(preg_replace('/\s+/', '', $item->value));
-
       // Render each element as link.
       $element[$delta] = array(
         '#type' => 'link',
-        '#title' => $item->title,
-        '#href' => $href,
+        // Use custom title if available, otherwise use the telephone number
+        // itself as title.
+        '#title' => $title_setting ?: $item->value,
+        // Prepend 'tel:' to the telephone number.
+        '#href' => 'tel:' . rawurlencode(preg_replace('/\s+/', '', $item->value)),
         '#options' => array('external' => TRUE),
       );
     }
diff --git a/core/modules/telephone/lib/Drupal/telephone/Plugin/field/widget/TelephoneDefaultWidget.php b/core/modules/telephone/lib/Drupal/telephone/Plugin/field/widget/TelephoneDefaultWidget.php
index e59adfc..52ee467 100644
--- a/core/modules/telephone/lib/Drupal/telephone/Plugin/field/widget/TelephoneDefaultWidget.php
+++ b/core/modules/telephone/lib/Drupal/telephone/Plugin/field/widget/TelephoneDefaultWidget.php
@@ -62,7 +62,7 @@ public function settingsSummary() {
   /**
    * Implements \Drupal\field\Plugin\Type\Widget\WidgetInterface::formElement().
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $element['value'] = $element + array(
       '#type' => 'tel',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : NULL,
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextDefaultFormatter.php b/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextDefaultFormatter.php
index a34da43..4237d8c 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextDefaultFormatter.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextDefaultFormatter.php
@@ -34,7 +34,7 @@ class TextDefaultFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextPlainFormatter.php b/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextPlainFormatter.php
index 2a95803..67daff4 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextPlainFormatter.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextPlainFormatter.php
@@ -34,7 +34,7 @@ class TextPlainFormatter extends FormatterBase {
   /**
    * Implements Drupal\field\Plugin\Type\Formatter\FormatterInterface::viewElements().
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     foreach ($items as $delta => $item) {
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextTrimmedFormatter.php b/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextTrimmedFormatter.php
index b59c73b..3de42b1 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextTrimmedFormatter.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/formatter/TextTrimmedFormatter.php
@@ -65,7 +65,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function viewElements(EntityInterface $entity, $langcode, FieldInterface $items) {
+  public function viewElements(FieldInterface $items) {
     $elements = array();
 
     $text_processing = $this->getFieldSetting('text_processing');
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWidget.php b/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWidget.php
index bcddb6d..e764c60 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWidget.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWidget.php
@@ -68,7 +68,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $main_widget = $element + array(
       '#type' => 'textarea',
       '#default_value' => $items[$delta]->value,
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWithSummaryWidget.php b/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWithSummaryWidget.php
index a6edca8..092b38f 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWithSummaryWidget.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextareaWithSummaryWidget.php
@@ -59,8 +59,8 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
-    $element = parent::formElement($items, $delta, $element, $langcode, $form, $form_state);
+  function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
+    $element = parent::formElement($items, $delta, $element, $form, $form_state);
 
     $display_summary = $items[$delta]->summary || $this->getFieldSetting('display_summary');
     $element['summary'] = array(
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextfieldWidget.php b/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextfieldWidget.php
index 3a24d37..06e61ad 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextfieldWidget.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/widget/TextfieldWidget.php
@@ -68,7 +68,7 @@ public function settingsSummary() {
   /**
    * {@inheritdoc}
    */
-  public function formElement(FieldInterface $items, $delta, array $element, $langcode, array &$form, array &$form_state) {
+  public function formElement(FieldInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $main_widget = $element + array(
       '#type' => 'textfield',
       '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : NULL,