Issue #1843752 by joelpittet, Sean Charles: Convert...

Issue #1843752 by joelpittet, Sean Charles: Convert views/templates/views-view-grouping.tpl.php to twig.

core/modules/views/templates/views-view-grouping.html.twig

+{#
+/**
+ * @file
+ * Default theme implementation to display a single views grouping.
+ *
+ * Available variables:
+ * - view: The view object.
+ * - grouping: The grouping instruction.
+ * - grouping_level: A number indicating the hierarchical level of the grouping.
+ * - title: The group heading.
+ * - content: The content to be grouped.
+ * - rows: The rows returned from the view.
+ *
+ * @see template_preprocess()
+ * @see template_preprocess_views_view_grouping()
+ *
+ * @ingroup themeable
+ */
+#}
+<div class="view-grouping">
+  <div class="view-grouping-header">{{ title }}</div>
+  <div class="view-grouping-content">{{ content }}</div>
+</div>

core/modules/views/templates/views-view-grouping.tpl.php

-<?php
-
-/**
- * @file
- * This template is used to print a single grouping in a view.
- *
- * It is not actually used in default Views, as this is registered as a theme
- * function which has better performance. For single overrides, the template is
- * perfectly okay.
- *
- * Variables available:
- * - $view: The view object
- * - $grouping: The grouping instruction.
- * - $grouping_level: Integer indicating the hierarchical level of the grouping.
- * - $rows: The rows contained in this grouping.
- * - $title: The title of this grouping.
- * - $content: The processed content output that will normally be used.
- */
-?>
-<div class="view-grouping">
-  <div class="view-grouping-header"><?php print $title; ?></div>
-  <div class="view-grouping-content">
-    <?php print $content; ?>
-  </div>
-</div>

core/modules/views/views.theme.inc

@@ -296,8 +296,19 @@ function template_preprocess_views_view_fields(&$vars) {
 }
 
 /**
- * Process a single grouping within a view.
- */
+ * Prepares variables for views single grouping templates.
+ *
+ * Default template: views-view-grouping.html.twig.
+ *
+ * @param array $vars
+ *   An associative array containing:
+ *   - view: The view object.
+ *   - rows: The rows returned from the view.
+ *   - grouping_level: Integer indicating the hierarchical level of the
+ *     grouping.
+ *   - content: The content to be grouped.
+ *   - title: The group heading.
+  */
 function template_preprocess_views_view_grouping(&$vars) {
   $vars['content'] = $vars['view']->style_plugin->render_grouping_sets($vars['rows'], $vars['grouping_level']);
 }