Add support for <ol reversed>, related attributes

CHANGES.rst

@@ -10,7 +10,6 @@ Features:
   opportunity <https://html.spec.whatwg.org/#the-wbr-element>`_. This element
   is allowed by default by the sanitizer. (#395) (Thank you, Tom Most!)
 
-
 1.1
 ~~~
 
@@ -34,7 +33,6 @@ Other changes:
   ``html5lib`` keeps working in future Python versions. (#403)
 * Drop optional ``datrie`` dependency. (#442)
 
-
 1.0.1
 ~~~~~
 

changelog.d/10.feature.rst

@@ -0,0 +1 @@
+Add support for serializing the ``<ol reversed>`` boolean attribute.  The ``<ol reversed>`` and ``<ol start>`` attributes are now permitted by the sanitizer.

html5lib/constants.py

@@ -605,6 +605,7 @@
     "button": frozenset(["disabled", "autofocus"]),
     "input": frozenset(["disabled", "readonly", "required", "autofocus", "checked", "ismap"]),
     "select": frozenset(["disabled", "readonly", "autofocus", "multiple"]),
+    "ol": frozenset(["reversed"]),
     "output": frozenset(["disabled", "readonly"]),
     "iframe": frozenset(["seamless"]),
 }

html5lib/filters/sanitizer.py

@@ -350,6 +350,7 @@
     (None, 'maxsize'),
     (None, 'minsize'),
     (None, 'other'),
+    (None, 'reversed'),
     (None, 'rowalign'),
     (None, 'rowalign'),
     (None, 'rowalign'),
@@ -360,6 +361,7 @@
     (None, 'scriptlevel'),
     (None, 'selection'),
     (None, 'separator'),
+    (None, 'start'),
     (None, 'stretchy'),
     (None, 'width'),
     (None, 'width'),

html5lib/tests/test_sanitizer.py

@@ -136,3 +136,21 @@ def test_uppercase_color_codes_in_style():
     sanitized = sanitize_html("<p style=\"border: 1px solid #A2A2A2;\"></p>")
     expected = '<p style=\"border: 1px solid #A2A2A2;\"></p>'
     assert expected == sanitized
+
+
+def test_ol_start_allowed():
+    sanitized = sanitize_html("<ol start=2><li>.</ol>")
+    expected = '<ol start="2"><li>.</li></ol>'
+    assert expected == sanitized
+
+
+def test_ol_type_allowed():
+    sanitized = sanitize_html("<ol type=I><li>.</ol>")
+    expected = '<ol type="I"><li>.</li></ol>'
+    assert expected == sanitized
+
+
+def test_ol_reversed_allowed():
+    sanitized = sanitize_html("<ol reversed><li>.</ol>")
+    expected = '<ol reversed><li>.</li></ol>'
+    assert expected == sanitized