Version 1

[yaffs-website] / web / core / lib / Drupal / Core / Render / Element / File.php

diff --git a/web/core/lib/Drupal/Core/Render/Element/File.php b/web/core/lib/Drupal/Core/Render/Element/File.php
new file mode 100644 (file)
index 0000000..07bd415
--- /dev/null
+++ b/web/core/lib/Drupal/Core/Render/Element/File.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace Drupal\Core\Render\Element;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Render\Element;
+
+/**
+ * Provides a form element for uploading a file.
+ *
+ * If you add this element to a form the enctype="multipart/form-data" attribute
+ * will automatically be added to the form element.
+ *
+ * Properties:
+ * - #multiple: A Boolean indicating whether multiple files may be uploaded.
+ * - #size: The size of the file input element in characters.
+ *
+ * @FormElement("file")
+ */
+class File extends FormElement {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getInfo() {
+    $class = get_class($this);
+    return [
+      '#input' => TRUE,
+      '#multiple' => FALSE,
+      '#process' => [
+        [$class, 'processFile'],
+      ],
+      '#size' => 60,
+      '#pre_render' => [
+        [$class, 'preRenderFile'],
+      ],
+      '#theme' => 'input__file',
+      '#theme_wrappers' => ['form_element'],
+    ];
+  }
+
+  /**
+   * Processes a file upload element, make use of #multiple if present.
+   */
+  public static function processFile(&$element, FormStateInterface $form_state, &$complete_form) {
+    if ($element['#multiple']) {
+      $element['#attributes'] = ['multiple' => 'multiple'];
+      $element['#name'] .= '[]';
+    }
+    return $element;
+  }
+
+  /**
+   * Prepares a #type 'file' render element for input.html.twig.
+   *
+   * For assistance with handling the uploaded file correctly, see the API
+   * provided by file.inc.
+   *
+   * @param array $element
+   *   An associative array containing the properties of the element.
+   *   Properties used: #title, #name, #size, #description, #required,
+   *   #attributes.
+   *
+   * @return array
+   *   The $element with prepared variables ready for input.html.twig.
+   */
+  public static function preRenderFile($element) {
+    $element['#attributes']['type'] = 'file';
+    Element::setAttributes($element, ['id', 'name', 'size']);
+    static::setAttributes($element, ['js-form-file', 'form-file']);
+
+    return $element;
+  }
+
+}