resolves #4383 allow the footnote tooltips to be localized

CHANGELOG.adoc

@@ -36,6 +36,7 @@ Enhancements::
   * Set logdev to $stderr if no arguments are passed to Logger constructor (#4250)
   * Add support for skipping TOML front matter (Hugo) when `skip-front-matter` attribute is set (#4300) (*@abhinav*)
   * Add support for Wistia using the video macro
+  * Allow the footnote toolips to be localized using the `view-footnote-tip` and `unresolved-footnoteref-tip` attributes (#4383)
 
 Compliance::
 

data/locale/attributes-en.adoc

@@ -21,3 +21,5 @@ ifdef::preface-title[:preface-title: Preface]
 :untitled-label: Untitled
 :version-label: Version
 :warning-caption: Warning
+:view-footnote-tip: View footnote.
+:unresolved-footnoteref-tip: Unresolved footnote reference.

lib/asciidoctor/converter/html5.rb

@@ -1190,14 +1190,15 @@ def convert_inline_callout node
 
   def convert_inline_footnote node
     if (index = node.attr 'index')
+      view_footnote_tip = node.document.attr 'view-footnote-tip', 'View footnote.'
       if node.type == :xref
-        %(<sup class="footnoteref">[<a class="footnote" href="#_footnotedef_#{index}" title="View footnote.">#{index}</a>]</sup>)
+        %(<sup class="footnoteref">[<a class="footnote" href="#_footnotedef_#{index}" title="#{view_footnote_tip}">#{index}</a>]</sup>)
       else
         id_attr = node.id ? %( id="_footnote_#{node.id}") : ''
-        %(<sup class="footnote"#{id_attr}>[<a id="_footnoteref_#{index}" class="footnote" href="#_footnotedef_#{index}" title="View footnote.">#{index}</a>]</sup>)
+        %(<sup class="footnote"#{id_attr}>[<a id="_footnoteref_#{index}" class="footnote" href="#_footnotedef_#{index}" title="#{view_footnote_tip}">#{index}</a>]</sup>)
       end
     elsif node.type == :xref
-      %(<sup class="footnoteref red" title="Unresolved footnote reference.">[#{node.text}]</sup>)
+      %(<sup class="footnoteref red" title="#{node.document.attr 'unresolved-footnoteref-tip', 'Unresolved footnote reference.'}">[#{node.text}]</sup>)
     end
   end
 

test/substitutions_test.rb

@@ -1324,6 +1324,19 @@
       assert_equal ['1. second footnote', '1. first footnote', '2. third footnote'], footnote_defs.map(&:text).map(&:strip)
     end
 
+    test 'footnote localization' do
+      using_memory_logger do |logger|
+        attributes = {
+          'view-footnote-tip' => 'Voir la note de bas de page.',
+          'unresolved-footnoteref-tip' => 'Référence de note de bas de page non résolue.',
+        }
+        para = block_from_string 'Sentence textfootnote:[An example footnote.].footnote:ex1[]', attributes: attributes
+        output = para.sub_macros para.source
+        assert_equal 'Sentence text<sup class="footnote">[<a id="_footnoteref_1" class="footnote" href="#_footnotedef_1" title="Voir la note de bas de page.">1</a>]</sup>.<sup class="footnoteref red" title="Référence de note de bas de page non résolue.">[ex1]</sup>', output
+        assert_message logger, :WARN, 'invalid footnote reference: ex1'
+      end
+    end
+
     test 'a single-line index term macro with a primary term should be registered as an index reference' do
       sentence = "The tiger (Panthera tigris) is the largest cat species.\n"
       macros = ['indexterm:[Tigers]', '(((Tigers)))']