| from __future__ import absolute_import, division, unicode_literals |
| |
| from . import base |
| |
| from collections import OrderedDict |
| |
| |
| def _attr_key(attr): |
| """Return an appropriate key for an attribute for sorting |
| |
| Attributes have a namespace that can be either ``None`` or a string. We |
| can't compare the two because they're different types, so we convert |
| ``None`` to an empty string first. |
| |
| """ |
| return (attr[0][0] or ''), attr[0][1] |
| |
| |
| class Filter(base.Filter): |
| """Alphabetizes attributes for elements""" |
| def __iter__(self): |
| for token in base.Filter.__iter__(self): |
| if token["type"] in ("StartTag", "EmptyTag"): |
| attrs = OrderedDict() |
| for name, value in sorted(token["data"].items(), |
| key=_attr_key): |
| attrs[name] = value |
| token["data"] = attrs |
| yield token |
