AsciiDoc: Add support for built-in alignment roles

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/32928

app/assets/stylesheets/framework/typography.scss

@@ -545,6 +545,24 @@
       }
     }
   }
+
+  /* AsciiDoc(tor) built-in alignment roles */
+
+  .text-left {
+    text-align: left !important;
+  }
+
+  .text-right {
+    text-align: right !important;
+  }
+
+  .text-center {
+    text-align: center !important;
+  }
+
+  .text-justify {
+    text-align: justify !important;
+  }
 }
 
 /**

changelogs/unreleased/asciidoc-alignment-roles.yml

+---
+title: 'AsciiDoc: Add support for built-in alignment roles.'
+merge_request: 32928
+author: mnrvwl
+type: fixed

lib/banzai/filter/ascii_doc_sanitization_filter.rb

@@ -18,6 +18,7 @@ module Banzai
 
       # Classes used by Asciidoctor to style components
       ADMONITION_CLASSES = %w(fa icon-note icon-tip icon-warning icon-caution icon-important).freeze
+      ALIGNMENT_BUILTINS_CLASSES = %w(text-center text-left text-right text-justify).freeze
       CALLOUT_CLASSES = ['conum'].freeze
       CHECKLIST_CLASSES = %w(fa fa-check-square-o fa-square-o).freeze
       LIST_CLASSES = %w(checklist none no-bullet unnumbered unstyled).freeze
@@ -28,7 +29,7 @@ module Banzai
 
       ELEMENT_CLASSES_WHITELIST = {
         span: %w(big small underline overline line-through).freeze,
-        div: ['admonitionblock'].freeze,
+        div: ALIGNMENT_BUILTINS_CLASSES + ['admonitionblock'].freeze,
         td: ['icon'].freeze,
         i: ADMONITION_CLASSES + CALLOUT_CLASSES + CHECKLIST_CLASSES,
         ul: LIST_CLASSES,