diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
index d5e0c17..19f1300 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/StringFormatter.php
@@ -19,6 +19,7 @@
  *   label = @Translation("Plain text"),
  *   field_types = {
  *     "string",
+ *     "string_long",
  *     "email"
  *   },
  *   edit = {
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php
index 63964de..93269f8 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php
@@ -16,6 +16,8 @@
  *   id = "string_long",
  *   label = @Translation("Long string"),
  *   description = @Translation("An entity field containing a long string value."),
+ *   default_widget = "string_textarea",
+ *   default_formatter = "string",
  *   no_ui = TRUE
  * )
  */
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextareaWidget.php
similarity index 62%
copy from core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php
copy to core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextareaWidget.php
index 3c57008..fae98b1 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/StringTextareaWidget.php
@@ -2,27 +2,26 @@
 
 /**
  * @file
- * Contains \Drupal\text\Plugin\Field\FieldWidget\TextareaWidget.
+ * Contains \Drupal\Core\Field\Plugin\Field\FieldWidget\StringTextareaWidget.
  */
 
-namespace Drupal\text\Plugin\Field\FieldWidget;
+namespace Drupal\Core\Field\Plugin\Field\FieldWidget;
 
 use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Field\WidgetBase;
-use Symfony\Component\Validator\ConstraintViolationInterface;
 
 /**
- * Plugin implementation of the 'text_textarea' widget.
+ * Plugin implementation of the 'string_textarea' widget.
  *
  * @FieldWidget(
- *   id = "text_textarea",
+ *   id = "string_textarea",
  *   label = @Translation("Text area (multiple rows)"),
  *   field_types = {
- *     "text_long"
+ *     "string_long"
  *   }
  * )
  */
-class TextareaWidget extends WidgetBase {
+class StringTextareaWidget extends WidgetBase {
 
   /**
    * {@inheritdoc}
@@ -73,7 +72,7 @@ public function settingsSummary() {
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, array &$form_state) {
-    $main_widget = $element + array(
+    $element['value'] = $element + array(
       '#type' => 'textarea',
       '#default_value' => $items[$delta]->value,
       '#rows' => $this->getSetting('rows'),
@@ -81,28 +80,6 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       '#attributes' => array('class' => array('text-full')),
     );
 
-    if ($this->getFieldSetting('text_processing')) {
-      $element = $main_widget;
-      $element['#type'] = 'text_format';
-      $element['#format'] = $items[$delta]->format;
-      $element['#base_type'] = $main_widget['#type'];
-    }
-    else {
-      $element['value'] = $main_widget;
-    }
-
-    return $element;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function errorElement(array $element, ConstraintViolationInterface $violation, array $form, array &$form_state) {
-    if ($violation->arrayPropertyPath == array('format') && isset($element['format']['#access']) && !$element['format']['#access']) {
-      // Ignore validation errors for formats if formats may not be changed,
-      // i.e. when existing formats become invalid. See filter_process_format().
-      return FALSE;
-    }
     return $element;
   }
 
diff --git a/core/modules/config_translation/lib/Drupal/config_translation/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/lib/Drupal/config_translation/Tests/ConfigTranslationUiTest.php
index 405aaf5..16b3718 100644
--- a/core/modules/config_translation/lib/Drupal/config_translation/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/lib/Drupal/config_translation/Tests/ConfigTranslationUiTest.php
@@ -299,8 +299,8 @@ public function testContactConfigEntityTranslation() {
 
       // Submit feedback.
       $edit = array(
-        'subject' => 'Test subject',
-        'message' => 'Test message',
+        'subject[0][value]' => 'Test subject',
+        'message[0][value]' => 'Test message',
       );
       $this->drupalPostForm(NULL, $edit, t('Send message'));
     }
diff --git a/core/modules/contact/contact.module b/core/modules/contact/contact.module
index 17db732..813f149 100644
--- a/core/modules/contact/contact.module
+++ b/core/modules/contact/contact.module
@@ -94,27 +94,11 @@ function contact_entity_extra_field_info() {
         'weight' => -30,
       );
     }
-    $fields['contact_message'][$bundle]['form']['subject'] = array(
-      'label' => t('Subject'),
-      'description' => t('Text'),
-      'weight' => -10,
-    );
-    $fields['contact_message'][$bundle]['form']['message'] = array(
-      'label' => t('Message'),
-      'description' => t('Long text'),
-      'weight' => 0,
-    );
     $fields['contact_message'][$bundle]['form']['copy'] = array(
       'label' => t('Send copy to sender'),
       'description' => t('Option'),
       'weight' => 50,
     );
-
-    $fields['contact_message'][$bundle]['display']['message'] = array(
-      'label' => t('Message'),
-      'description' => t('The main contact message'),
-      'weight' => 0,
-    );
   }
 
   $fields['user']['user']['form']['contact'] = array(
diff --git a/core/modules/contact/lib/Drupal/contact/Entity/Message.php b/core/modules/contact/lib/Drupal/contact/Entity/Message.php
index ff35420..e504674 100644
--- a/core/modules/contact/lib/Drupal/contact/Entity/Message.php
+++ b/core/modules/contact/lib/Drupal/contact/Entity/Message.php
@@ -155,13 +155,37 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t("The sender's email"))
       ->setDescription(t('The email of the person that is sending the contact message.'));
 
+    // The subject of the contact message.
     $fields['subject'] = FieldDefinition::create('string')
-      ->setLabel(t('The message subject'))
-      ->setDescription(t('The subject of the contact message.'));
-
-    $fields['message'] = FieldDefinition::create('string')
-      ->setLabel(t('The message text'))
-      ->setDescription(t('The text of the contact message.'));
+      ->setLabel(t('Subject'))
+      ->setRequired(TRUE)
+      ->setSettings(array(
+        'max_length' => 100,
+      ))
+      ->setDisplayOptions('form', array(
+        'type' => 'string',
+        'weight' => -10,
+      ))
+      ->setDisplayConfigurable('form', TRUE);
+
+    // The text of the contact message.
+    $fields['message'] = FieldDefinition::create('string_long')
+      ->setLabel(t('Message'))
+      ->setRequired(TRUE)
+      ->setDisplayOptions('form', array(
+        'type' => 'string_textarea',
+        'weight' => 0,
+        'settings' => array(
+          'rows' => 12,
+        ),
+      ))
+      ->setDisplayConfigurable('form', TRUE)
+      ->setDisplayOptions('view', array(
+        'type' => 'string',
+        'weight' => 0,
+        'label' => 'above',
+      ))
+      ->setDisplayConfigurable('view', TRUE);
 
     $fields['copy'] = FieldDefinition::create('boolean')
       ->setLabel(t('Copy'))
diff --git a/core/modules/contact/lib/Drupal/contact/MessageFormController.php b/core/modules/contact/lib/Drupal/contact/MessageFormController.php
index 122665f..fea027f 100644
--- a/core/modules/contact/lib/Drupal/contact/MessageFormController.php
+++ b/core/modules/contact/lib/Drupal/contact/MessageFormController.php
@@ -83,19 +83,6 @@ public function form(array $form, array &$form_state) {
       );
     }
 
-    $form['subject'] = array(
-      '#type' => 'textfield',
-      '#title' => t('Subject'),
-      '#maxlength' => 100,
-      '#required' => TRUE,
-    );
-    $form['message'] = array(
-      '#type' => 'textarea',
-      '#title' => t('Message'),
-      '#required' => TRUE,
-      '#rows' => 12,
-    );
-
     $form['copy'] = array(
       '#type' => 'checkbox',
       '#title' => t('Send yourself a copy.'),
diff --git a/core/modules/contact/lib/Drupal/contact/Tests/ContactAuthenticatedUserTest.php b/core/modules/contact/lib/Drupal/contact/Tests/ContactAuthenticatedUserTest.php
index 059923f..cd8e39d 100644
--- a/core/modules/contact/lib/Drupal/contact/Tests/ContactAuthenticatedUserTest.php
+++ b/core/modules/contact/lib/Drupal/contact/Tests/ContactAuthenticatedUserTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\contact\ContactAuthenticatedUserTest.
+ * Contains \Drupal\contact\ContactAuthenticatedUserTest.
  */
 
 namespace Drupal\contact\Tests;
diff --git a/core/modules/contact/lib/Drupal/contact/Tests/ContactPersonalTest.php b/core/modules/contact/lib/Drupal/contact/Tests/ContactPersonalTest.php
index c7056a7..91aaace 100644
--- a/core/modules/contact/lib/Drupal/contact/Tests/ContactPersonalTest.php
+++ b/core/modules/contact/lib/Drupal/contact/Tests/ContactPersonalTest.php
@@ -2,11 +2,12 @@
 
 /**
  * @file
- * Definition of Drupal\contact\Tests\ContactPersonalTest.
+ * Contains \Drupal\contact\Tests\ContactPersonalTest.
  */
 
 namespace Drupal\contact\Tests;
 
+use Drupal\Core\Session\AccountInterface;
 use Drupal\simpletest\WebTestBase;
 
 /**
@@ -78,13 +79,13 @@ function testSendPersonalContactMessage() {
     $this->assertEqual($mail['key'], 'user_mail');
     $variables = array(
       '!site-name' => \Drupal::config('system.site')->get('name'),
-      '!subject' => $message['subject'],
+      '!subject' => $message['subject[0][value]'],
       '!recipient-name' => $this->contact_user->getUsername(),
     );
     $this->assertEqual($mail['subject'], t('[!site-name] !subject', $variables), 'Subject is in sent message.');
     $this->assertTrue(strpos($mail['body'], t('Hello !recipient-name,', $variables)) !== FALSE, 'Recipient name is in sent message.');
     $this->assertTrue(strpos($mail['body'], $this->web_user->getUsername()) !== FALSE, 'Sender name is in sent message.');
-    $this->assertTrue(strpos($mail['body'], $message['message']) !== FALSE, 'Message body is in sent message.');
+    $this->assertTrue(strpos($mail['body'], $message['message[0][value]']) !== FALSE, 'Message body is in sent message.');
   }
 
   /**
@@ -212,18 +213,22 @@ function testPersonalContactFlood() {
   /**
    * Fills out a user's personal contact form and submits it.
    *
-   * @param $account
+   * @param \Drupal\Core\Session\AccountInterface $account
    *   A user object of the user being contacted.
-   * @param $message
+   * @param array $message
    *   (optional) An array with the form fields being used. Defaults to an empty
    *   array.
+   *
+   * @return array
+   *   An array with the form fields being used.
    */
-  protected function submitPersonalContact($account, array $message = array()) {
+  protected function submitPersonalContact(AccountInterface $account, array $message = array()) {
     $message += array(
-      'subject' => $this->randomName(16),
-      'message' => $this->randomName(64),
+      'subject[0][value]' => $this->randomName(16),
+      'message[0][value]' => $this->randomName(64),
     );
     $this->drupalPostForm('user/' . $account->id() . '/contact', $message, t('Send message'));
     return $message;
   }
+
 }
diff --git a/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php b/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
index 126fc75..9d23432 100644
--- a/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
+++ b/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\contact\Tests\ContactSitewideTest.
+ * Contains \Drupal\contact\Tests\ContactSitewideTest.
  */
 
 namespace Drupal\contact\Tests;
@@ -257,14 +257,14 @@ function testSiteWideContact() {
 
     // Submit the contact form and verify the content.
     $edit = array(
-      'subject' => $this->randomName(),
-      'message' => $this->randomName(),
+      'subject[0][value]' => $this->randomName(),
+      'message[0][value]' => $this->randomName(),
       $field_name . '[0][value]' => $this->randomName(),
     );
     $this->drupalPostForm(NULL, $edit, t('Send message'));
     $mails = $this->drupalGetMails();
     $mail = array_pop($mails);
-    $this->assertEqual($mail['subject'], t('[@label] @subject', array('@label' => $label, '@subject' => $edit['subject'])));
+    $this->assertEqual($mail['subject'], t('[@label] @subject', array('@label' => $label, '@subject' => $edit['subject[0][value]'])));
     $this->assertTrue(strpos($mail['body'], $field_label));
     $this->assertTrue(strpos($mail['body'], $edit[$field_name . '[0][value]']));
   }
@@ -381,8 +381,8 @@ function submitContact($name, $mail, $subject, $id, $message) {
     $edit = array();
     $edit['name'] = $name;
     $edit['mail'] = $mail;
-    $edit['subject'] = $subject;
-    $edit['message'] = $message;
+    $edit['subject[0][value]'] = $subject;
+    $edit['message[0][value]'] = $message;
     if ($id == \Drupal::config('contact.settings')->get('default_category')) {
       $this->drupalPostForm('contact', $edit, t('Send message'));
     }
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php
index 3c57008..a8afeb3 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldWidget/TextareaWidget.php
@@ -8,7 +8,7 @@
 namespace Drupal\text\Plugin\Field\FieldWidget;
 
 use Drupal\Core\Field\FieldItemListInterface;
-use Drupal\Core\Field\WidgetBase;
+use Drupal\Core\Field\Plugin\Field\FieldWidget\StringTextareaWidget;
 use Symfony\Component\Validator\ConstraintViolationInterface;
 
 /**
@@ -22,76 +22,23 @@
  *   }
  * )
  */
-class TextareaWidget extends WidgetBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function defaultSettings() {
-    return array(
-      'rows' => '5',
-      'placeholder' => '',
-    ) + parent::defaultSettings();
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function settingsForm(array $form, array &$form_state) {
-    $element['rows'] = array(
-      '#type' => 'number',
-      '#title' => t('Rows'),
-      '#default_value' => $this->getSetting('rows'),
-      '#required' => TRUE,
-      '#min' => 1,
-    );
-    $element['placeholder'] = array(
-      '#type' => 'textfield',
-      '#title' => t('Placeholder'),
-      '#default_value' => $this->getSetting('placeholder'),
-      '#description' => t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
-    );
-    return $element;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function settingsSummary() {
-    $summary = array();
-
-    $summary[] = t('Number of rows: !rows', array('!rows' => $this->getSetting('rows')));
-    $placeholder = $this->getSetting('placeholder');
-    if (!empty($placeholder)) {
-      $summary[] = t('Placeholder: @placeholder', array('@placeholder' => $placeholder));
-    }
-
-    return $summary;
-  }
+class TextareaWidget extends StringTextareaWidget {
 
   /**
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, array &$form_state) {
-    $main_widget = $element + array(
-      '#type' => 'textarea',
-      '#default_value' => $items[$delta]->value,
-      '#rows' => $this->getSetting('rows'),
-      '#placeholder' => $this->getSetting('placeholder'),
-      '#attributes' => array('class' => array('text-full')),
-    );
+    $main_widget = parent::formElement($items, $delta, $element, $form, $form_state);
 
     if ($this->getFieldSetting('text_processing')) {
-      $element = $main_widget;
+      $element = $main_widget['value'];
       $element['#type'] = 'text_format';
       $element['#format'] = $items[$delta]->format;
-      $element['#base_type'] = $main_widget['#type'];
-    }
-    else {
-      $element['value'] = $main_widget;
+      $element['#base_type'] = $main_widget['value']['#type'];
+      return $element;
     }
 
-    return $element;
+    return $main_widget;
   }
 
   /**