consolidate accept classes into the single AcceptCharset class

CHANGES.txt

@@ -25,6 +25,16 @@ Feature
   content-negotiation is needed versus using ``acceptable_offers`` directly.
   See https://github.com/Pylons/webob/pull/460
 
+- Consolidation of ``AcceptCharset`` header handling into a single class.
+  See backward incompatibilities below for more information.
+  See https://github.com/Pylons/webob/pull/461
+
+- ``webob.acceptparse.AcceptCharset``, methods ``best_match``, ``quality``, and
+  ``__contains__`` are now convenience methods for most use-cases where
+  content-negotiation is needed versus using ``acceptable_offers`` directly.
+  See backward incompatibilities below.
+  See https://github.com/Pylons/webob/pull/461
+
 Compatibility
 ~~~~~~~~~~~~~
 
@@ -51,6 +61,22 @@ Backwards Incompatibilities
   Their logic is consistent with ``acceptable_offers``.
   See https://github.com/Pylons/webob/pull/460
 
+- Remove ``AcceptCharsetValidHeader``, ``AcceptCharsetNoHeader`` and
+  ``AcceptCharsetInvalidHeader``. These classes are consolidated into
+  ``AcceptCharset`` with a ``header_state`` attribute for users that need
+  to know the state of the header.
+  See https://github.com/Pylons/webob/pull/461
+
+- Remove previously-deprecated ``webob.acceptparse.AcceptCharset.__iter__``.
+  See https://github.com/Pylons/webob/pull/461
+
+- ``webob.acceptparse.AcceptCharset`` methods, ``best_match``, ``quality``,
+  and ``__contains__`` properly take into account the full header, including
+  quality values of 0 prior to determining a match. Previously they would allow
+  wildcards to match and override explicit ``q=0`` clauses. Their logic is now
+  consistent with ``acceptable_offers``.
+  See https://github.com/Pylons/webob/pull/461
+
 Experimental Features
 ~~~~~~~~~~~~~~~~~~~~~
 

docs/api/webob.txt

@@ -31,26 +31,14 @@ methods:
 .. autoclass:: Accept
    :members:
        parse, header_value, parsed, header_state, __init__, __add__,
-       __bool__, __radd__, __repr__, __str__, __contains__,
+       __bool__, __radd__, __repr__, __str__, __contains__, copy,
        accept_html, accepts_html, acceptable_offers, best_match, quality
 
 .. autoclass:: AcceptCharset
-   :members: parse
-
-.. autoclass:: AcceptCharsetValidHeader
-   :members: parse, header_value, parsed, __init__, __add__, __bool__,
-         __contains__, __iter__, __radd__, __repr__, __str__,
-             acceptable_offers, best_match, quality
-
-.. autoclass:: AcceptCharsetNoHeader
-   :members: parse, header_value, parsed, __init__, __add__, __bool__,
-         __contains__, __iter__, __radd__, __repr__, __str__,
-             acceptable_offers, best_match, quality
-
-.. autoclass:: AcceptCharsetInvalidHeader
-   :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:: AcceptEncoding
    :members: parse