1 files changed, 16 insertions, 65 deletions
diff --git a/sphinx/ext/jsmath.py b/sphinx/ext/jsmath.py
index 84e0f9037..47e1b1836 100644
--- a/sphinx/ext/jsmath.py
+++ b/sphinx/ext/jsmath.py
@@ -9,81 +9,32 @@
     :license: BSD, see LICENSE for details.
 """
 
-from typing import cast
+import warnings
 
-from docutils import nodes
+from sphinxcontrib.jsmath import (  # NOQA
+    html_visit_math,
+    html_visit_displaymath,
+    install_jsmath,
+)
 
 import sphinx
-from sphinx.builders.html import StandaloneHTMLBuilder
-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.deprecation import RemovedInSphinx40Warning
 
 if False:
     # For type annotation
     from typing import Any, Dict  # NOQA
     from sphinx.application import Sphinx  # NOQA
-    from sphinx.environment import BuildEnvironment  # NOQA
-    from sphinx.writers.html import HTMLTranslator  # NOQA
-
-
-def html_visit_math(self, node):
-    # type: (HTMLTranslator, nodes.math) -> None
-    self.body.append(self.starttag(node, 'span', '', CLASS='math notranslate nohighlight'))
-    self.body.append(self.encode(node.astext()) + '</span>')
-    raise nodes.SkipNode
-
-
-def html_visit_displaymath(self, node):
-    # type: (HTMLTranslator, nodes.math_block) -> None
-    if node['nowrap']:
-        self.body.append(self.starttag(node, 'div', CLASS='math notranslate nohighlight'))
-        self.body.append(self.encode(node.astext()))
-        self.body.append('</div>')
-        raise nodes.SkipNode
-    for i, part in enumerate(node.astext().split('\n\n')):
-        part = self.encode(part)
-        if i == 0:
-            # necessary to e.g. set the id property correctly
-            if node['number']:
-                number = get_node_equation_number(self, node)
-                self.body.append('<span class="eqno">(%s)' % number)
-                self.add_permalink_ref(node, _('Permalink to this equation'))
-                self.body.append('</span>')
-            self.body.append(self.starttag(node, 'div', CLASS='math notranslate nohighlight'))
-        else:
-            # but only once!
-            self.body.append('<div class="math">')
-        if '&' in part or '\\\\' in part:
-            self.body.append('\\begin{split}' + part + '\\end{split}')
-        else:
-            self.body.append(part)
-        self.body.append('</div>\n')
-    raise nodes.SkipNode
-
-
-def install_jsmath(app, env):
-    # type: (Sphinx, BuildEnvironment) -> None
-    if app.builder.format != 'html' or app.builder.math_renderer_name != 'jsmath':  # type: ignore  # NOQA
-        return
-    if not app.config.jsmath_path:
-        raise ExtensionError('jsmath_path config value must be set for the '
-                             'jsmath extension to work')
-
-    builder = cast(StandaloneHTMLBuilder, app.builder)
-    domain = cast(MathDomain, env.get_domain('math'))
-    if domain.has_equations():
-        # Enable jsmath only if equations exists
-        builder.add_js_file(app.config.jsmath_path)
 
 
 def setup(app):
     # type: (Sphinx) -> Dict[str, Any]
-    app.add_html_math_renderer('jsmath',
-                               (html_visit_math, None),
-                               (html_visit_displaymath, None))
+    warnings.warn('sphinx.ext.jsmath has been moved to sphinxcontrib-jsmath.',
+                  RemovedInSphinx40Warning)
+
+    app.setup_extension('sphinxcontrib.jsmath')
 
-    app.add_config_value('jsmath_path', '', False)
-    app.connect('env-check-consistency', install_jsmath)
-    return {'version': sphinx.__display_version__, 'parallel_read_safe': True}
+    return {
+        'version': sphinx.__display_version__,
+        'parallel_read_safe': True,
+        'parallel_write_safe': True,
+    }