Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/lib/html/element/setting/checkbox.php

@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * Renderer of settings page checkbox option.
+ *
+ * @author       Time.ly Network, Inc.
+ * @instantiator new
+ * @since        2.0
+ * @package      Ai1EC
+ * @subpackage   Ai1EC.Html
+ */
+class Ai1ec_Html_Settings_Checkbox extends Ai1ec_Html_Element_Settings {
+
+
+    /* (non-PHPdoc)
+     * @see Ai1ec_Html_Element_Settings::render()
+     */
+    public function render( $output = '', $wrap = true, $hidden = false ) {
+        $attributes = array(
+            'class' => 'checkbox',
+        );
+        if ( true === $this->_args['value'] ) {
+            $attributes['checked'] = 'checked';
+        }
+        $args               = $this->_args;
+        $args['attributes'] = $attributes;
+        $loader             = $this->_registry->get( 'theme.loader' );
+        $file               = $loader->get_file(
+            'setting/checkbox.twig',
+            $args,
+            true
+        );
+        return parent::render( $file->get_content(), $wrap, $hidden );
+    }
+
+}