Factor out HTML 4 translator (#11051)

Move the HTML 4 translator into a private module.

1 files changed, 3 insertions, 3 deletions

diff --git a/sphinx/ext/mathjax.py b/sphinx/ext/mathjax.py
index e87e9ea64..9bdfc09c2 100644
--- a/sphinx/ext/mathjax.py
+++ b/sphinx/ext/mathjax.py
@@ -16,7 +16,7 @@ from sphinx.domains.math import MathDomain
 from sphinx.errors import ExtensionError
 from sphinx.locale import _
 from sphinx.util.math import get_node_equation_number
-from sphinx.writers.html import HTMLTranslator
+from sphinx.writers.html import HTML5Translator
 
 # more information for mathjax secure url is here:
 # https://docs.mathjax.org/en/latest/start.html#secure-access-to-the-cdn
@@ -25,7 +25,7 @@ MATHJAX_URL = 'https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js'
 logger = sphinx.util.logging.getLogger(__name__)
 
 
-def html_visit_math(self: HTMLTranslator, node: nodes.math) -> None:
+def html_visit_math(self: HTML5Translator, node: nodes.math) -> None:
     self.body.append(self.starttag(node, 'span', '', CLASS='math notranslate nohighlight'))
     self.body.append(self.builder.config.mathjax_inline[0] +
                      self.encode(node.astext()) +
@@ -33,7 +33,7 @@ def html_visit_math(self: HTMLTranslator, node: nodes.math) -> None:
     raise nodes.SkipNode
 
 
-def html_visit_displaymath(self: HTMLTranslator, node: nodes.math_block) -> None:
+def html_visit_displaymath(self: HTML5Translator, node: nodes.math_block) -> None:
     self.body.append(self.starttag(node, 'div', CLASS='math notranslate nohighlight'))
     if node['nowrap']:
         self.body.append(self.encode(node.astext()))