first commit

themes/bootstrap/src/Plugin/Form/NodePreviewFormSelect.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Drupal\bootstrap\Plugin\Form;
+
+use Drupal\bootstrap\Bootstrap;
+use Drupal\bootstrap\Utility\Element;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Implements hook_form_FORM_ID_alter().
+ *
+ * @ingroup plugins_form
+ *
+ * @BootstrapForm("node_preview_form_select")
+ */
+class NodePreviewFormSelect extends FormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function alterFormElement(Element $form, FormStateInterface $form_state, $form_id = NULL) {
+    $form->addClass(['form-inline', 'bg-info', 'text-center', 'clearfix']);
+
+    // Backlink.
+    $options = $form->backlink->getProperty('options', []);
+
+    $form->backlink->addClass(isset($options['attributes']['class']) ? $options['attributes']['class'] : []);
+    $form->backlink->addClass(['btn', 'btn-info', 'pull-left']);
+    $form->backlink->setButtonSize();
+    $form->backlink->setIcon(Bootstrap::glyphicon('chevron-left'));
+
+    // Ensure the UUID is set.
+    if ($uuid = $form->uuid->getProperty('value')) {
+      $options['query'] = ['uuid' => $uuid];
+    }
+
+    // Override the options attributes.
+    $options['attributes'] = $form->backlink->getAttributes()->getArrayCopy();
+
+    $form->backlink->setProperty('options', $options);
+
+    // View mode.
+    $form->view_mode->addClass('pull-right', $form::WRAPPER);
+  }
+
+}