Fix #1953: `Sphinx.add_node does not add handlers the translator installed by html_translator_class`

CHANGES

@@ -105,6 +105,8 @@ Bugs fixed
   module.  Now Sphinx installs them on running application.
 * `sphinx.ext.autodoc` crashes if target code imports * from mock modules
   by `autodoc_mock_imports`.
+* #1953: ``Sphinx.add_node`` does not add handlers the translator installed by
+  `html_translator_class`
 
 Documentation
 -------------

sphinx/application.py

@@ -176,6 +176,12 @@ class Sphinx(object):
                 'This project needs at least Sphinx v%s and therefore cannot '
                 'be built with this version.' % self.config.needs_sphinx)
 
+        # force preload html_translator_class
+        if self.config.html_translator_class:
+            translator_class = self.import_object(self.config.html_translator_class,
+                                                  'html_translator_class setting')
+            self.set_translator('html', translator_class)
+
         # set confdir to srcdir if -C given (!= no confdir); a few pieces
         # of code expect a confdir to be set
         if self.confdir is None:

sphinx/builders/html.py

@@ -159,16 +159,11 @@ class StandaloneHTMLBuilder(Builder):
                                           self.config.trim_doctest_flags)
 
     def init_translator_class(self):
-        if self.translator_class is not None:
-            pass
-        elif self.config.html_translator_class:
-            self.translator_class = self.app.import_object(
-                self.config.html_translator_class,
-                'html_translator_class setting')
-        elif self.config.html_use_smartypants:
-            self.translator_class = SmartyPantsHTMLTranslator
-        else:
-            self.translator_class = HTMLTranslator
+        if self.translator_class is None:
+            if self.config.html_use_smartypants:
+                self.translator_class = SmartyPantsHTMLTranslator
+            else:
+                self.translator_class = HTMLTranslator
 
     def get_outdated_docs(self):
         cfgdict = dict((name, self.config[name])
@@ -1209,7 +1204,6 @@ def setup(app):
     app.add_config_value('html_extra_path', [], 'html')
     app.add_config_value('html_last_updated_fmt', None, 'html', string_classes)
     app.add_config_value('html_use_smartypants', True, 'html')
-    app.add_config_value('html_translator_class', None, 'html', string_classes)
     app.add_config_value('html_sidebars', {}, 'html')
     app.add_config_value('html_additional_pages', {}, 'html')
     app.add_config_value('html_use_modindex', True, 'html')  # deprecated

sphinx/config.py

@@ -108,6 +108,9 @@ class Config(object):
                           'table': l_('Table %s'),
                           'code-block': l_('Listing %s')},
                          'env'),
+
+        # pre-initialized confval for HTML builder
+        html_translator_class = (None, 'html', string_classes),
     )
 
     def __init__(self, dirname, filename, overrides, tags):
@@ -221,7 +224,7 @@ class Config(object):
 
     def pre_init_values(self, warn):
         """Initialize some limited config variables before loading extensions"""
-        variables = ['needs_sphinx', 'suppress_warnings']
+        variables = ['needs_sphinx', 'suppress_warnings', 'html_translator_class']
         for name in variables:
             try:
                 if name in self.overrides:

tests/test_api_translator.py

@@ -57,7 +57,7 @@ def test_html_with_set_translator_for_html_(app, status, warning):
 
 
 @with_app('html', testroot='api-set-translator',
-          confoverrides={'html_translator_class': 'ext.ExtHTMLTranslator'})
+          confoverrides={'html_translator_class': 'translator.ExtHTMLTranslator'})
 def test_html_with_set_translator_for_html_and_html_translator_class(
         app, status, warning):
     # use set_translator() and html_translator_class.