consolidate AcceptEncodingXXXHeader classes into the single AcceptEnc…

…oding class

CHANGES.txt

@@ -34,6 +34,15 @@ Feature
   ``acceptable_offers``. See backward incompatibilities below.
   See https://github.com/Pylons/webob/pull/461
 
+- Consolidation of ``AcceptEncoding`` header handling into a single class.
+  See backward incompatibilities below for more information.
+  See https://github.com/Pylons/webob/pull/462
+
+- ``webob.acceptparse.AcceptEncoding``, methods ``best_match``, ``quality``,
+  and ``__contains__`` are undeprecated and their logic is made consistent with
+  ``acceptable_offers``. See backward incompatibilities below.
+  See https://github.com/Pylons/webob/pull/462
+
 Compatibility
 ~~~~~~~~~~~~~
 
@@ -84,6 +93,27 @@ Backwards Incompatibilities
 
   See https://github.com/Pylons/webob/pull/461
 
+- Remove ``AcceptEncodingValidHeader``, ``AcceptEncodingNoHeader`` and
+  ``AcceptEncodingInvalidHeader``. These classes are consolidated into
+  ``AcceptEncoding`` with a ``header_state`` attribute for users that need
+  to know the state of the header.
+  See https://github.com/Pylons/webob/pull/462
+
+- Remove previously-deprecated ``webob.acceptparse.AcceptEncoding.__iter__``.
+  See https://github.com/Pylons/webob/pull/462
+
+- ``webob.acceptparse.AcceptEncoding`` methods, ``best_match``, ``quality``,
+  and ``__contains__`` are now thin wrappers around ``acceptable_offers`` which
+  modifies their behavior slightly:
+
+  - A tuple can no longer be an offer containing server-side quality values.
+  - An offer will only match a ``*`` clause in a header if it does not match
+    any other clauses.
+  - The ``identity`` offer was not properly considered a match unless the
+    header explicitly it excluded via ``*;q=0`` or ``identity;q=0``.
+
+  See https://github.com/Pylons/webob/pull/462
+
 Experimental Features
 ~~~~~~~~~~~~~~~~~~~~~
 

docs/api/webob.txt

@@ -41,22 +41,10 @@ methods:
        acceptable_offers, best_match, quality
 
 .. autoclass:: AcceptEncoding
-   :members: parse
-
-.. autoclass:: AcceptEncodingValidHeader
-   :members: parse, header_value, parsed, __init__, __add__, __bool__,
-             __contains__, __iter__, __radd__, __repr__, __str__,
-             acceptable_offers, best_match, quality
-
-.. autoclass:: AcceptEncodingNoHeader
-   :members: parse, header_value, parsed, __init__, __add__, __bool__,
-             __contains__, __iter__, __radd__, __repr__, __str__,
-             acceptable_offers, best_match, quality
-
-.. autoclass:: AcceptEncodingInvalidHeader
-   :members: parse, header_value, parsed, __init__, __add__, __bool__,
-             __contains__, __iter__, __radd__, __repr__, __str__,
-             acceptable_offers, best_match, quality
+   :members:
+       parse, header_value, parsed, header_state, __init__, __add__,
+       __bool__, __radd__, __repr__, __str__, __contains__, copy,
+       acceptable_offers, best_match, quality
 
 .. autoclass:: AcceptLanguage
    :members: parse