Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/text/src/TextProcessed.php

@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\text\TextProcessed.
+ */
+
+namespace Drupal\text;
+
+use Drupal\Component\Utility\SafeMarkup;
+use Drupal\Core\TypedData\DataDefinitionInterface;
+use Drupal\Core\TypedData\TypedDataInterface;
+use Drupal\Core\TypedData\TypedData;
+
+/**
+ * A computed property for processing text with a format.
+ *
+ * Required settings (below the definition's 'settings' key) are:
+ *  - text source: The text property containing the to be processed text.
+ */
+class TextProcessed extends TypedData {
+
+  /**
+   * Cached processed text.
+   *
+   * @var string|null
+   */
+  protected $processed = NULL;
+
+  /**
+   * Overrides TypedData::__construct().
+   */
+  public function __construct(DataDefinitionInterface $definition, $name = NULL, TypedDataInterface $parent = NULL) {
+    parent::__construct($definition, $name, $parent);
+
+    if ($definition->getSetting('text source') === NULL) {
+      throw new \InvalidArgumentException("The definition's 'text source' key has to specify the name of the text property to be processed.");
+    }
+  }
+
+  /**
+   * Implements \Drupal\Core\TypedData\TypedDataInterface::getValue().
+   */
+  public function getValue($langcode = NULL) {
+    if ($this->processed !== NULL) {
+      return $this->processed;
+    }
+
+    $item = $this->getParent();
+    $text = $item->{($this->definition->getSetting('text source'))};
+
+    // Avoid running check_markup() or
+    // \Drupal\Component\Utility\SafeMarkup::checkPlain() on empty strings.
+    if (!isset($text) || $text === '') {
+      $this->processed = '';
+    }
+    else {
+      $this->processed = check_markup($text, $item->format, $item->getLangcode());
+    }
+    return $this->processed;
+  }
+
+  /**
+   * Implements \Drupal\Core\TypedData\TypedDataInterface::setValue().
+   */
+  public function setValue($value, $notify = TRUE) {
+    $this->processed = $value;
+    // Notify the parent of any changes.
+    if ($notify && isset($this->parent)) {
+      $this->parent->onChange($this->name);
+    }
+  }
+
+}