render_math_src

sphinx/ext/imgmath.py

@@ -263,19 +263,20 @@ def render_math(self: HTMLTranslator, math: str) -> Tuple[Optional[str], Optiona
     return relfn, depth, imgpath, outfn
 
 
-def render_math_src(self: HTMLTranslator, math: str) -> str, int:
+def render_math_src(self: HTMLTranslator, math: str) -> Tuple[Optional[str], Optional[int]]:
     fname, depth, imgpath, outfn = render_math(self, math)
     if self.builder.config.imgmath_embed:
         image_format = self.builder.config.imgmath_image_format.lower()
         mimetype = {'png': 'image/png', 'svg': 'image/svg+xml'}[image_format]
         encoded = base64.b64encode(open(outfn, "rb").read()).decode()
-        return f'data:{mimetype};base64,{encoded}', depth
+        img_src = f'data:{mimetype};base64,{encoded}'
     else:
         # Move generated image on tempdir to build dir
         if imgpath is not None:
             ensuredir(path.dirname(outfn))
             shutil.move(imgpath, outfn)
-        return fname, depth
+        img_src = fname
+    return img_src, depth
 
 
 def cleanup_tempdir(app: Sphinx, exc: Exception) -> None:
@@ -323,7 +324,7 @@ def html_visit_displaymath(self: HTMLTranslator, node: nodes.math_block) -> None
     else:
         latex = wrap_displaymath(node.astext(), None, False)
     try:
-        img_src, depth = render_math(self, latex)
+        img_src, depth = render_math_src(self, latex)
     except MathExtError as exc:
         msg = str(exc)
         sm = nodes.system_message(msg, type='WARNING', level=2,

tests/test_ext_math.py

@@ -56,6 +56,24 @@ def test_imgmath_svg(app, status, warning):
     assert re.search(html, content, re.S)
 
 
+@pytest.mark.skipif(not has_binary('dvisvgm'),
+                    reason='Requires dvisvgm" binary')
+@pytest.mark.sphinx('html', testroot='ext-math-simple',
+                    confoverrides={'extensions': ['sphinx.ext.imgmath'],
+                                   'imgmath_image_format': 'svg',
+                                   'imgmath_embed': True})
+def test_imgmath_svg_embed(app, status, warning):
+    app.builder.build_all()
+    if "LaTeX command 'latex' cannot be run" in warning.getvalue():
+        raise pytest.skip.Exception('LaTeX command "latex" is not available')
+    if "dvisvgm command 'dvisvgm' cannot be run" in warning.getvalue():
+        raise pytest.skip.Exception('dvisvgm command "dvisvgm" is not available')
+
+    content = (app.outdir / 'index.html').read_text(encoding='utf8')
+    html=r'<img src="data:image/svg\+xml;base64,[\w\+/=]+"'
+    assert re.search(html, content, re.S)
+
+
 @pytest.mark.sphinx('html', testroot='ext-math',
                     confoverrides={'extensions': ['sphinx.ext.mathjax'],
                                    'mathjax_options': {'integrity': 'sha384-0123456789'}})