[PATCH] remove unnecessary encoding in the default filters, now that everything is a unicode object internally

There is no longer any value in having the filters return encoded str objects,
since they need to be decoded back to unicode before they can be combined with
the rest of the template text (which is managed as a unicode object).  This
patch maintains API compatibility but fundamentally changes the behavior of
some of the filters.  RawOrEncodedUnicode and EncodeUnicode should be
deprecated and removed from the API.

---
 cheetah/Filters.py |   35 +++++++----------------------------
 1 files changed, 7 insertions(+), 28 deletions(-)

diff --git a/cheetah/Filters.py b/cheetah/Filters.py
index 452afc5..d452439 100644
--- a/cheetah/Filters.py
+++ b/cheetah/Filters.py
@@ -29,40 +29,19 @@ class Filter(object):
         if val is None:
             return u''
         if isinstance(val, unicode):
-            if encoding:
-                return val.encode(encoding)
-            else:
-                return val
+            # ignore the encoding and return the unicode object
+            return val
         else:
             try:
-                return str(val)
-            except UnicodeEncodeError:
                 return unicode(val)
-        return u''
+            except UnicodeDecodeError:
+                # we could put more fallbacks here, but we'll just pass the str
+                # on and let DummyTransaction worry about it
+                return str(val)
 
 RawOrEncodedUnicode = Filter
 
-class EncodeUnicode(Filter):
-    def filter(self, val,
-               encoding='utf8',
-               str=str,
-               **kw):
-        """Encode Unicode strings, by default in UTF-8.
-
-        >>> import Cheetah.Template
-        >>> t = Cheetah.Template.Template('''
-        ... $myvar
-        ... ${myvar, encoding='utf16'}
-        ... ''', searchList=[{'myvar': u'Asni\xe8res'}],
-        ... filter='EncodeUnicode')
-        >>> print t
-        """
-        if isinstance(val, unicode):
-            return val
-        if val is None:
-            return ''
-        return str(val)
-
+EncodeUnicode = Filter
 
 class Markdown(EncodeUnicode):
     '''
-- 
1.6.2.5


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