repurpose example block as open block if filetype is not html

CHANGELOG.adoc

@@ -4,6 +4,12 @@
 This document provides a curated view of the changes to Asciidoctor Tabs per release.
 For a detailed view of what has changed, refer to the {url-repo}/commits/main[commit history] on GitHub.
 
+== Unreleased
+
+=== Changed
+
+* Repurpose example block as open block if filetype is not html
+
 == 1.0.0-beta.5 (2023-05-28) - @mojavelinux
 
 === Changed

lib/asciidoctor/tabs/block.rb

@@ -7,18 +7,14 @@ class Block < ::Asciidoctor::Extensions::BlockProcessor
       on_context :example
 
       def process parent, reader, attrs
-        tabs_number = (doc = parent.document).counter 'tabs-number'
+        doc = parent.document
+        return create_open_block parent, nil, attrs unless doc.attr? 'filetype', 'html'
+        tabs_number = doc.counter 'tabs-number'
         block = create_block parent, attrs['cloaked-context'], nil, attrs, content_model: :compound
         children = (parse_content block, reader).blocks
         unless children.size == 1 && (seed_tabs = children[0]).context == :dlist && seed_tabs.items?
           return (reset_counter doc, 'tabs-number', (tabs_number - 1)) || block
         end
-        unless doc.attr? 'filetype', 'html'
-          (id = attrs['id']) && (doc.register :refs, [(seed_tabs.id = id), seed_tabs]) unless seed_tabs.id
-          (reftext = attrs['reftext']) && (seed_tabs.set_attr 'reftext', reftext) unless seed_tabs.reftext?
-          parent << seed_tabs
-          return reset_counter doc, 'tabs-number', (tabs_number - 1)
-        end
         tabs_id = attrs['id'] || (generate_id %(tabs #{tabs_number}), doc)
         tabs_role = 'tabs' + (!(block.option? 'nosync') && ((block.option? 'sync') || (doc.option? 'tabs-sync')) ?
           ((gid = attrs['sync-group-id']) ? %( is-sync data-sync-group-id=#{gid.gsub ' ', ?\u00a0}) : ' is-sync') : '')

spec/tabs_spec.rb

@@ -857,27 +857,29 @@ def convert_ulist node
       (expect actual).to eql expected
     end
 
-    it 'should output original dlist if filetype is not html' do
+    it 'should output original dlist in open block if filetype is not html' do
       input = <<~END
       [#not-tabs,reftext=Not Tabs]
       #{single_tab}
       END
       expected = <<~'END'.chomp
-      <variablelist xml:id="not-tabs" xreflabel="Not Tabs">
+      <para xml:id="not-tabs" xreflabel="Not Tabs">
+      <variablelist>
       <varlistentry>
       <term>Tab A</term>
       <listitem>
       <simpara>Contents of tab A.</simpara>
       </listitem>
       </varlistentry>
       </variablelist>
+      </para>
       END
 
       actual = Asciidoctor.convert input, backend: 'docbook'
       (expect actual).to eql expected
     end
 
-    it 'should prefer ID and reftext on dlist when filetype is not html' do
+    it 'should preserve ID and reftext on dlist when filetype is not html' do
       input = <<~'END'
       [tabs#not-tabs,reftext=Not Tabs]
       ====
@@ -886,6 +888,7 @@ def convert_ulist node
       ====
       END
       expected = <<~'END'.chomp
+      <para xml:id="not-tabs" xreflabel="Not Tabs">
       <variablelist xml:id="varlist-1" xreflabel="A Variable List">
       <varlistentry>
       <term>Tab A</term>
@@ -894,6 +897,7 @@ def convert_ulist node
       </listitem>
       </varlistentry>
       </variablelist>
+      </para>
       END
 
       actual = Asciidoctor.convert input, backend: 'docbook'