diff --git a/diff.services.yml b/diff.services.yml
old mode 100755
new mode 100644
index 55bd570..992808a
--- a/diff.services.yml
+++ b/diff.services.yml
@@ -21,3 +21,7 @@ services:
     parent: system.breadcrumb.default
     tags:
       - { name: breadcrumb_builder, priority: 1000 }
+
+  diff.entity_comparison:
+    class: Drupal\diff\DiffEntityComparison
+    arguments: ['@config.factory', '@diff.diff.formatter','@plugin.manager.field.field_type', '@diff.entity_parser']
diff --git a/src/Controller/GenericRevisionController.php b/src/Controller/GenericRevisionController.php
index 00f08a9..8e6f637 100644
--- a/src/Controller/GenericRevisionController.php
+++ b/src/Controller/GenericRevisionController.php
@@ -89,14 +89,15 @@ class GenericRevisionController extends EntityComparisonBase {
 
     // Perform comparison only if both entity revisions loaded successfully.
     if ($left_revision != FALSE && $right_revision != FALSE) {
-      $fields = $this->compareRevisions($left_revision, $right_revision);
+      //Get a comparison for all fields.
+      $fields = $this->entityComparison->compareRevisions($left_revision, $right_revision);
       $entity_base_fields = $this->entityManager()->getBaseFieldDefinitions($entity_type_id);
       // Check to see if we need to display certain fields or not based on
       // selected view mode display settings.
       foreach ($fields as $field_name => $field) {
         // If we are dealing with entities only compare those fields
         // set as visible from the selected view mode.
-        $view_mode = $this->config->get('content_type_settings.' . $entity->bundle() . '.view_mode');
+        $view_mode = $this->entityComparison->config->get('content_type_settings.' . $entity->bundle() . '.view_mode');
         // If no view mode is selected use the default view mode.
         if ($view_mode == NULL) {
           $view_mode = 'default';
@@ -106,9 +107,10 @@ class GenericRevisionController extends EntityComparisonBase {
           unset($fields[$field_name]);
         }
       }
-      // Build the diff rows for each field and append the field rows
-      // to the table rows.
+
+      // Build field rows and add to the table rows.
       foreach ($fields as $field) {
+        //Build a field label row
         $field_label_row = '';
         if (!empty($field['#name'])) {
           $field_label_row = array(
@@ -117,7 +119,8 @@ class GenericRevisionController extends EntityComparisonBase {
             'class' => array('field-name'),
           );
         }
-        $field_diff_rows = $this->getRows(
+        // Get the field diff rows.
+        $field_diff_rows = $this->entityComparison->getRows(
           $field['#states'][$filter]['#left'],
           $field['#states'][$filter]['#right']
         );
@@ -133,7 +136,7 @@ class GenericRevisionController extends EntityComparisonBase {
 
       // Add the CSS for the diff.
       $build['#attached']['library'][] = 'diff/diff.general';
-      $theme = $this->config->get('general_settings.theme');
+      $theme = $this->entityComparison->config->get('general_settings.theme');
       if ($theme) {
         if ($theme == 'default') {
           $build['#attached']['library'][] = 'diff/diff.default';
diff --git a/src/Controller/NodeRevisionController.php b/src/Controller/NodeRevisionController.php
index da4e7ad..e97184e 100644
--- a/src/Controller/NodeRevisionController.php
+++ b/src/Controller/NodeRevisionController.php
@@ -71,14 +71,15 @@ class NodeRevisionController extends EntityComparisonBase {
 
     // Perform comparison only if both node revisions loaded successfully.
     if ($left_revision != FALSE && $right_revision != FALSE) {
-      $fields = $this->compareRevisions($left_revision, $right_revision);
+      //Get a comparison for all fields.
+      $fields = $this->entityComparison->compareRevisions($left_revision, $right_revision);
       $node_base_fields = $this->entityManager()->getBaseFieldDefinitions('node');
       // Check to see if we need to display certain fields or not based on
       // selected view mode display settings.
       foreach ($fields as $field_name => $field) {
         // If we are dealing with nodes only compare those fields
         // set as visible from the selected view mode.
-        $view_mode = $this->config->get('content_type_settings.' . $node->getType() . '.view_mode');
+        $view_mode = $this->entityComparison->config->get('content_type_settings.' . $node->getType() . '.view_mode');
         // If no view mode is selected use the default view mode.
         if ($view_mode == NULL) {
           $view_mode = 'default';
@@ -88,9 +89,10 @@ class NodeRevisionController extends EntityComparisonBase {
           unset($fields[$field_name]);
         }
       }
-      // Build the diff rows for each field and append the field rows
-      // to the table rows.
+
+      // Build field rows and add to the table rows.
       foreach ($fields as $field) {
+        //Build a field label row
         $field_label_row = '';
         if (!empty($field['#name'])) {
           $field_label_row = array(
@@ -99,7 +101,8 @@ class NodeRevisionController extends EntityComparisonBase {
             'class' => array('field-name'),
           );
         }
-        $field_diff_rows = $this->getRows(
+        // Get the field diff rows.
+        $field_diff_rows = $this->entityComparison->getRows(
           $field['#states'][$filter]['#left'],
           $field['#states'][$filter]['#right']
         );
@@ -115,7 +118,7 @@ class NodeRevisionController extends EntityComparisonBase {
 
       // Add the CSS for the diff.
       $build['#attached']['library'][] = 'diff/diff.general';
-      $theme = $this->config->get('general_settings.theme');
+      $theme = $this->entityComparison->config->get('general_settings.theme');
       if ($theme) {
         if ($theme == 'default') {
           $build['#attached']['library'][] = 'diff/diff.default';
diff --git a/src/DiffEntityComparison.php b/src/DiffEntityComparison.php
new file mode 100644
index 0000000..95b5210
--- /dev/null
+++ b/src/DiffEntityComparison.php
@@ -0,0 +1,293 @@
+<?php
+
+namespace Drupal\diff;
+
+use Drupal\Core\Config\ConfigFactory;
+use Drupal\Component\Plugin\PluginManagerInterface;
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Component\Diff\Diff;
+use Drupal\Core\Render\Element;
+use Drupal\Core\Mail\MailFormatHelper;
+use Drupal\Component\Utility\Xss;
+
+/**
+ * Entity comparison service that compares fields on a pair of entities
+ * and helps to prepare a display of differences.
+ */
+class DiffEntityComparison {
+
+  /**
+   * Drupal\Core\Config\ConfigFactory definition.
+   *
+   * @var Drupal\Core\Config\ConfigFactory
+   */
+  protected $configfactory;
+
+  /**
+   * Wrapper obj. for write/read a simple configuration from diff.settings.yml.
+   */
+  public $config;
+
+  /**
+   * Wrapper object for write/read a simple configuration from diff.plugins.yml.
+   */
+  protected $pluginsConfig;
+
+  /**
+   * DiffFormatter service.
+   *
+   * @var \Drupal\diff\DiffFormatter
+   */
+  protected $diffFormatter;
+
+  /**
+   * A list of all the field types from the system and their definitions.
+   */
+  protected $fieldTypeDefinitions;
+
+  /**
+   * The entity comparison service for diff.
+   */
+  protected $entityParser;
+
+  /**
+   * Constructs a DiffEntityComparison object.
+   *
+   * @param ConfigFactory $config_factory
+   *   Diff formatter service.
+   * @param DiffFormatter $diff_formatter
+   *   Diff formatter service.
+   * @param PluginManagerInterface $plugin_manager
+   *   The Plugin manager service.
+   * @param DiffEntityParser $entity_parser
+   *   The diff field builder plugin manager.
+   */
+  public function __construct(ConfigFactory $config_factory, DiffFormatter $diff_formatter, PluginManagerInterface $plugin_manager, DiffEntityParser $entity_parser) {
+    $this->configfactory = $config_factory;
+    $this->config = $this->configfactory->get('diff.settings');
+    $this->pluginsConfig = $this->configfactory->get('diff.plugins');
+    $this->diffFormatter = $diff_formatter;
+    $this->fieldTypeDefinitions = $plugin_manager->getDefinitions();
+    $this->entityParser = $entity_parser;
+  }
+
+  /**
+   * This method should return an array of items ready to be compared.
+   *
+   * @param ContentEntityInterface $left_entity
+   *   The left entity.
+   * @param ContentEntityInterface $right_entity
+   *   The right entity.
+   *
+   * @return array
+   *   Items ready to be compared by the Diff component.
+   */
+  public function compareRevisions(ContentEntityInterface $left_entity, ContentEntityInterface $right_entity) {
+    $result = array();
+
+    $left_values = $this->entityParser->parseEntity($left_entity);
+    $right_values = $this->entityParser->parseEntity($right_entity);
+
+    foreach ($left_values as $field_name => $values) {
+      $field_definition = $left_entity->getFieldDefinition($field_name);
+      // Get the compare settings for this field type.
+      $compare_settings = $this->pluginsConfig->get('field_types.' . $field_definition->getType());
+      $result[$field_name] = array(
+        '#name' => ($compare_settings['settings']['show_header'] == 1) ? $field_definition->getLabel() : '',
+        '#settings' => $compare_settings,
+      );
+
+      // Fields which exist on the right entity also.
+      if (isset($right_values[$field_name])) {
+        $result[$field_name] += $this->combineFields($left_values[$field_name], $right_values[$field_name]);
+        // Unset the field from the right entity so that we know if the right
+        // entity has any fields that left entity doesn't have.
+        unset($right_values[$field_name]);
+      }
+      // This field exists only on the left entity.
+      else {
+        $result[$field_name] += $this->combineFields($left_values[$field_name], array());
+      }
+    }
+
+    // Fields which exist only on the right entity.
+    foreach ($right_values as $field_name => $values) {
+      $field_definition = $right_entity->getFieldDefinition($field_name);
+      $compare_settings = $this->pluginsConfig->get('field_types.' . $field_definition->getType());
+      $result[$field_name] = array(
+        '#name' => ($compare_settings['settings']['show_header'] == 1) ? $field_definition->getLabel() : '',
+        '#settings' => $compare_settings,
+      );
+      $result[$field_name] += $this->combineFields(array(), $right_values[$field_name]);
+    }
+
+    // Field rows. Recurse through all child elements.
+    foreach (Element::children($result) as $key) {
+      $result[$key]['#states'] = array();
+      // Ensure that the element follows the #states format.
+      if (isset($result[$key]['#left'])) {
+        // We need to trim spaces and new lines from the end of the string
+        // otherwise in some cases we have a blank not needed line.
+        $result[$key]['#states']['raw']['#left'] = trim($result[$key]['#left']);
+        unset($result[$key]['#left']);
+      }
+      if (isset($result[$key]['#right'])) {
+        $result[$key]['#states']['raw']['#right'] = trim($result[$key]['#right']);
+        unset($result[$key]['#right']);
+      }
+      $field_settings = $result[$key]['#settings'];
+
+      if (!empty($field_settings['settings']['markdown'])) {
+        $result[$key]['#states']['raw_plain']['#left'] = $this->applyMarkdown($field_settings['settings']['markdown'], $result[$key]['#states']['raw']['#left']);
+        $result[$key]['#states']['raw_plain']['#right'] = $this->applyMarkdown($field_settings['settings']['markdown'], $result[$key]['#states']['raw']['#right']);
+      }
+      // In case the settings are not loaded correctly use drupal_html_to_text
+      // to avoid any possible notices when a user clicks on markdown.
+      else {
+        $result[$key]['#states']['raw_plain']['#left'] = $this->applyMarkdown('drupal_html_to_text', $result[$key]['#states']['raw']['#left']);
+        $result[$key]['#states']['raw_plain']['#right'] = $this->applyMarkdown('drupal_html_to_text', $result[$key]['#states']['raw']['#right']);
+      }
+    }
+
+    // Process the array (split the strings into single line strings)
+    // and get line counts per field.
+    array_walk($result, array($this, 'processStateLine'));
+
+    return $result;
+  }
+
+  /**
+   * Combine two fields into an array with keys '#left' and '#right'.
+   *
+   * @param $left_values
+   *   Entity field formatted into an array of strings.
+   * @param $right_values
+   *   Entity field formatted into an array of strings.
+   *
+   * @return array
+   *   Array resulted after combining the left and right values.
+   */
+  protected function combineFields($left_values, $right_values) {
+    $result = array(
+      '#left' => array(),
+      '#right' => array(),
+    );
+    $max = max(array(count($left_values), count($right_values)));
+    for ($delta = 0; $delta < $max; $delta++) {
+      if (isset($left_values[$delta])) {
+        $value = $left_values[$delta];
+        $result['#left'][] = is_array($value) ? implode("\n", $value) : $value;
+      }
+      if (isset($right_values[$delta])) {
+        $value = $right_values[$delta];
+        $result['#right'][] = is_array($value) ? implode("\n", $value) : $value;
+      }
+    }
+
+    // If a field has multiple values combine them into one single string.
+    $result['#left'] = implode("\n", $result['#left']);
+    $result['#right'] = implode("\n", $result['#right']);
+
+    return $result;
+  }
+
+  /**
+   * Prepare the table rows for theme 'table'.
+   *
+   * @param string $a
+   *   The source string to compare from.
+   * @param string $b
+   *   The target string to compare to.
+   * @param bool $show_header
+   *   Display diff context headers. For example, "Line x".
+   * @param array $line_stats
+   *   This structure tracks line no. across multiple calls to DiffFormatter.
+   *
+   * @return array
+   *   Array of rows usable with theme('table').
+   */
+  public function getRows($a, $b, $show_header = FALSE, &$line_stats = NULL) {
+    $a = is_array($a) ? $a : explode("\n", $a);
+    $b = is_array($b) ? $b : explode("\n", $b);
+
+    // Temporary workaround: when comparing with an empty string, Diff Component
+    // returns a change OP instead of an add OP.
+    if (count($a) == 1 && $a[0] == "") {
+      $a = array();
+    }
+
+    if (!isset($line_stats)) {
+      $line_stats = array(
+        'counter' => array('x' => 0, 'y' => 0),
+        'offset' => array('x' => 0, 'y' => 0),
+      );
+    }
+
+    // Header is the line counter.
+    $this->diffFormatter->show_header = $show_header;
+    $diff = new Diff($a, $b);
+
+    return $this->diffFormatter->format($diff);
+  }
+
+  /**
+   * Splits the strings into lines and counts the resulted number of lines.
+   *
+   * @param $diff
+   *   Array of strings.
+   */
+  protected function processStateLine(&$diff) {
+    foreach ($diff['#states'] as $state => $data) {
+      if (isset($data['#left'])) {
+        if (is_string($data['#left'])) {
+          $diff['#states'][$state]['#left'] = explode("\n", $data['#left']);
+        }
+        $diff['#states'][$state]['#count_left'] = count($diff['#states'][$state]['#left']);
+      }
+      else {
+        $diff['#states'][$state]['#count_left'] = 0;
+      }
+      if (isset($data['#right'])) {
+        if (is_string($data['#right'])) {
+          $diff['#states'][$state]['#right'] = explode("\n", $data['#right']);
+        }
+        $diff['#states'][$state]['#count_right'] = count($diff['#states'][$state]['#right']);
+      }
+      else {
+        $diff['#states'][$state]['#count_right'] = 0;
+      }
+    }
+  }
+
+  /**
+   * Applies a markdown function to a string.
+   *
+   * @param $markdown
+   *   Key of the markdown function to be applied to the items.
+   *   One of drupal_html_to_text, filter_xss, filter_xss_all.
+   * @param $items
+   *   String to be processed.
+   *
+   * @return array|string
+   *   Result after markdown was applied on $items.
+   */
+  protected function applyMarkdown($markdown, $items) {
+    if (!$markdown) {
+      return $items;
+    }
+
+    if ($markdown == 'drupal_html_to_text') {
+      return trim(MailFormatHelper::htmlToText($items), "\n");
+    }
+    elseif ($markdown == 'filter_xss') {
+      return trim(Xss::filter($items), "\n");
+    }
+    elseif ($markdown == 'filter_xss_all') {
+      return trim(Xss::filter($items, array()), "\n");
+    }
+    else {
+      return $items;
+    }
+  }
+
+}
diff --git a/src/EntityComparisonBase.php b/src/EntityComparisonBase.php
index 850b810..e6fe66b 100644
--- a/src/EntityComparisonBase.php
+++ b/src/EntityComparisonBase.php
@@ -1,39 +1,18 @@
 <?php
 
-/**
- * @file
- * Contains \Drupal\diff\EntityComparisonBase.
- */
-
 namespace Drupal\diff;
 
 use Symfony\Component\DependencyInjection\ContainerInterface;
-use Drupal\Component\Plugin\PluginManagerInterface;
-use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Controller\ControllerBase;
-use Drupal\Core\Render\Element;
-use Drupal\Component\Diff\Diff;
 use Drupal\Core\Datetime\DateFormatter;
-use Drupal\Component\Utility\Xss;
-use Drupal\Core\Mail\MailFormatHelper;
-use Drupal\Component\Render\FormattableMarkup;
+use Drupal\diff\DiffEntityComparison;
 
 /**
- * Builds an array of data out of entity fields.
- *
- * The resulted data is then passed through the Diff component and
- * displayed on the UI and represents the differences between two entities.
+ * Provides a base class for diff revision controllers.
  */
 class EntityComparisonBase extends ControllerBase {
 
   /**
-   * DiffFormatter service.
-   *
-   * @var \Drupal\diff\DiffFormatter
-   */
-  protected $diffFormatter;
-
-  /**
    * The date service.
    *
    * @var \Drupal\Core\Datetime\DateFormatter
@@ -41,50 +20,21 @@ class EntityComparisonBase extends ControllerBase {
   protected $date;
 
   /**
-   * Wrapper object for writing/reading simple configuration from diff.settings.yml
-   */
-  protected $config;
-
-  /**
-   * Wrapper object for writing/reading simple configuration from diff.plugins.yml
-   */
-  protected $pluginsConfig;
-
-  /**
-   * A list of all the field types from the system and their definitions.
-   */
-  protected $fieldTypeDefinitions;
-
-  /**
-   * Represents non breaking space HTML character entity marked as safe markup.
+   * The entity comparison service for diff.
    */
-  protected $nonBreakingSpace;
-
-  /**
-   * The entity parser service for diff.
-   */
-  protected $entityParser;
+  protected $entityComparison;
 
   /**
    * Constructs an EntityComparisonBase object.
    *
-   * @param DiffFormatter $diff_formatter
-   *   Diff formatter service.
    * @param DateFormatter $date
    *   DateFormatter service.
-   * @param PluginManagerInterface $plugin_manager
-   *   The Plugin manager service.
-   * @param DiffEntityParser $entityParser
-   *   The diff field builder plugin manager.
+   * @param DiffEntityComparison $entitycomparison
+   *   The diff entity comparison service.
    */
-  public function __construct(DiffFormatter $diff_formatter, DateFormatter $date, PluginManagerInterface $plugin_manager, DiffEntityParser $entityParser) {
-    $this->diffFormatter = $diff_formatter;
+  public function __construct(DateFormatter $date, $entitycomparison) {
     $this->date = $date;
-    $this->fieldTypeDefinitions = $plugin_manager->getDefinitions();
-    $this->config = $this->config('diff.settings');
-    $this->pluginsConfig = $this->config('diff.plugins');
-    $this->nonBreakingSpace = new FormattableMarkup('&nbsp;', array());
-    $this->entityParser = $entityParser;
+    $this->entityComparison = $entitycomparison;
   }
 
   /**
@@ -92,230 +43,9 @@ class EntityComparisonBase extends ControllerBase {
    */
   public static function create(ContainerInterface $container) {
     return new static(
-      $container->get('diff.diff.formatter'),
       $container->get('date.formatter'),
-      $container->get('plugin.manager.field.field_type'),
-      $container->get('diff.entity_parser')
+      $container->get('diff.entity_comparison')
     );
   }
 
-  /**
-   * This method should return an array of items ready to be compared.
-   *
-   * @param ContentEntityInterface $left_entity
-   *   The left entity
-   * @param ContentEntityInterface $right_entity
-   *   The right entity
-   *
-   * @return array
-   *   Items ready to be compared by the Diff component.
-   */
-  public function compareRevisions(ContentEntityInterface $left_entity, ContentEntityInterface $right_entity) {
-    $result = array();
-
-    $left_values = $this->entityParser->parseEntity($left_entity);
-    $right_values = $this->entityParser->parseEntity($right_entity);
-
-    foreach ($left_values as $field_name => $values) {
-      $field_definition = $left_entity->getFieldDefinition($field_name);
-      // Get the compare settings for this field type.
-      $compare_settings = $this->pluginsConfig->get('field_types.' . $field_definition->getType());
-      $result[$field_name] = array(
-        '#name' => ($compare_settings['settings']['show_header'] == 1) ? $field_definition->getLabel() : '',
-        '#settings' => $compare_settings,
-      );
-
-      // Fields which exist on the right entity also.
-      if (isset($right_values[$field_name])) {
-        $result[$field_name] += $this->combineFields($left_values[$field_name], $right_values[$field_name]);
-        // Unset the field from the right entity so that we know if the right
-        // entity has any fields that left entity doesn't have.
-        unset($right_values[$field_name]);
-      }
-      // This field exists only on the left entity.
-      else {
-        $result[$field_name] += $this->combineFields($left_values[$field_name], array());
-      }
-    }
-
-    // Fields which exist only on the right entity.
-    foreach ($right_values as $field_name => $values) {
-      $field_definition = $right_entity->getFieldDefinition($field_name);
-      $compare_settings = $this->pluginsConfig->get('field_types.' . $field_definition->getType());
-      $result[$field_name] = array(
-        '#name' => ($compare_settings['settings']['show_header'] == 1) ? $field_definition->getLabel() : '',
-        '#settings' => $compare_settings,
-      );
-      $result[$field_name] += $this->combineFields(array(), $right_values[$field_name]);
-    }
-
-    // Field rows. Recurse through all child elements.
-    foreach (Element::children($result) as $key) {
-      $result[$key]['#states'] = array();
-      // Ensure that the element follows the #states format.
-      if (isset($result[$key]['#left'])) {
-        // We need to trim spaces and new lines from the end of the string
-        // otherwise in some cases we have a blank not needed line.
-        $result[$key]['#states']['raw']['#left'] = trim($result[$key]['#left']);
-        unset($result[$key]['#left']);
-      }
-      if (isset($result[$key]['#right'])) {
-        $result[$key]['#states']['raw']['#right'] = trim($result[$key]['#right']);
-        unset($result[$key]['#right']);
-      }
-      $field_settings = $result[$key]['#settings'];
-
-      if (!empty($field_settings['settings']['markdown'])) {
-        $result[$key]['#states']['raw_plain']['#left'] = $this->applyMarkdown($field_settings['settings']['markdown'], $result[$key]['#states']['raw']['#left']);
-        $result[$key]['#states']['raw_plain']['#right'] = $this->applyMarkdown($field_settings['settings']['markdown'], $result[$key]['#states']['raw']['#right']);
-      }
-      // In case the settings are not loaded correctly use drupal_html_to_text
-      // to avoid any possible notices when a user clicks on markdown.
-      else {
-        $result[$key]['#states']['raw_plain']['#left'] = $this->applyMarkdown('drupal_html_to_text', $result[$key]['#states']['raw']['#left']);
-        $result[$key]['#states']['raw_plain']['#right'] = $this->applyMarkdown('drupal_html_to_text', $result[$key]['#states']['raw']['#right']);
-      }
-    }
-
-    // Process the array (split the strings into single line strings)
-    // and get line counts per field.
-    array_walk($result, array($this, 'processStateLine'));
-
-    return $result;
-  }
-
-  /**
-   * Combine two fields into an array with keys '#left' and '#right'.
-   *
-   * @param $left_values
-   *   Entity field formatted into an array of strings.
-   * @param $right_values
-   *   Entity field formatted into an array of strings.
-   *
-   * @return array
-   *   Array resulted after combining the left and right values.
-   */
-  protected function combineFields($left_values, $right_values) {
-    $result = array(
-      '#left' => array(),
-      '#right' => array(),
-    );
-    $max = max(array(count($left_values), count($right_values)));
-    for ($delta = 0; $delta < $max; $delta++) {
-      if (isset($left_values[$delta])) {
-        $value = $left_values[$delta];
-        $result['#left'][] = is_array($value) ? implode("\n", $value) : $value;
-      }
-      if (isset($right_values[$delta])) {
-        $value = $right_values[$delta];
-        $result['#right'][] = is_array($value) ? implode("\n", $value) : $value;
-      }
-    }
-
-    // If a field has multiple values combine them into one single string.
-    $result['#left'] = implode("\n", $result['#left']);
-    $result['#right'] = implode("\n", $result['#right']);
-
-    return $result;
-  }
-
-  /**
-   * Prepare the table rows for theme 'table'.
-   *
-   * @param string $a
-   *   The source string to compare from.
-   * @param string $b
-   *   The target string to compare to.
-   * @param boolean $show_header
-   *   Display diff context headers. For example, "Line x".
-   * @param array $line_stats
-   *   This structure tracks line numbers across multiple calls to DiffFormatter.
-   *
-   * @return array
-   *   Array of rows usable with theme('table').
-   */
-  protected function getRows($a, $b, $show_header = FALSE, &$line_stats = NULL) {
-    $a = is_array($a) ? $a : explode("\n", $a);
-    $b = is_array($b) ? $b : explode("\n", $b);
-
-    // Temporary workaround: when comparing with an empty string, Diff Component
-    // returns a change OP instead of an add OP.
-    if (count($a) == 1 && $a[0] == "") {
-      $a = array();
-    }
-
-    if (!isset($line_stats)) {
-      $line_stats = array(
-        'counter' => array('x' => 0, 'y' => 0),
-        'offset' => array('x' => 0, 'y' => 0),
-      );
-    }
-
-    // Header is the line counter.
-    $this->diffFormatter->show_header = $show_header;
-    $diff = new Diff($a, $b);
-
-    return $this->diffFormatter->format($diff);
-  }
-
-  /**
-   * Splits the strings into lines and counts the resulted number of lines.
-   *
-   * @param $diff
-   *   Array of strings.
-   */
-  function processStateLine(&$diff) {
-    foreach ($diff['#states'] as $state => $data) {
-      if (isset($data['#left'])) {
-        if (is_string($data['#left'])) {
-          $diff['#states'][$state]['#left'] = explode("\n", $data['#left']);
-        }
-        $diff['#states'][$state]['#count_left'] = count($diff['#states'][$state]['#left']);
-      }
-      else {
-        $diff['#states'][$state]['#count_left'] = 0;
-      }
-      if (isset($data['#right'])) {
-        if (is_string($data['#right'])) {
-          $diff['#states'][$state]['#right'] = explode("\n", $data['#right']);
-        }
-        $diff['#states'][$state]['#count_right'] = count($diff['#states'][$state]['#right']);
-      }
-      else {
-        $diff['#states'][$state]['#count_right'] = 0;
-      }
-    }
-  }
-
-  /**
-   * Applies a markdown function to a string.
-   *
-   * @param $markdown
-   *   Key of the markdown function to be applied to the items.
-   *   One of drupal_html_to_text, filter_xss, filter_xss_all.
-   * @param $items
-   *   String to be processed.
-   *
-   * @return array|string
-   *   Result after markdown was applied on $items.
-   */
-  protected function applyMarkdown($markdown, $items) {
-    if (!$markdown) {
-      return $items;
-    }
-
-    if ($markdown == 'drupal_html_to_text') {
-      return trim(MailFormatHelper::htmlToText($items), "\n");
-    }
-    elseif ($markdown == 'filter_xss') {
-      return trim(Xss::filter($items), "\n");
-    }
-    elseif ($markdown == 'filter_xss_all') {
-      return trim(Xss::filter($items, array()), "\n");
-    }
-    else {
-      return $items;
-    }
   }
 
 }