Adding new stuff

vim-plugins/python-mode/pymode/libs/logilab/common/interface.py

@@ -1,71 +0,0 @@
-# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
-# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
-#
-# This file is part of logilab-common.
-#
-# logilab-common is free software: you can redistribute it and/or modify it under
-# the terms of the GNU Lesser General Public License as published by the Free
-# Software Foundation, either version 2.1 of the License, or (at your option) any
-# later version.
-#
-# logilab-common is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
-# details.
-#
-# You should have received a copy of the GNU Lesser General Public License along
-# with logilab-common.  If not, see <http://www.gnu.org/licenses/>.
-"""Bases class for interfaces to provide 'light' interface handling.
-
- TODO:
-  _ implements a check method which check that an object implements the
-    interface
-  _ Attribute objects
-
-  This module requires at least python 2.2
-"""
-__docformat__ = "restructuredtext en"
-
-
-class Interface(object):
-    """Base class for interfaces."""
-    def is_implemented_by(cls, instance):
-        return implements(instance, cls)
-    is_implemented_by = classmethod(is_implemented_by)
-
-
-def implements(obj, interface):
-    """Return true if the give object (maybe an instance or class) implements
-    the interface.
-    """
-    kimplements = getattr(obj, '__implements__', ())
-    if not isinstance(kimplements, (list, tuple)):
-        kimplements = (kimplements,)
-    for implementedinterface in kimplements:
-        if issubclass(implementedinterface, interface):
-            return True
-    return False
-
-
-def extend(klass, interface, _recurs=False):
-    """Add interface to klass'__implements__ if not already implemented in.
-
-    If klass is subclassed, ensure subclasses __implements__ it as well.
-
-    NOTE: klass should be e new class.
-    """
-    if not implements(klass, interface):
-        try:
-            kimplements = klass.__implements__
-            kimplementsklass = type(kimplements)
-            kimplements = list(kimplements)
-        except AttributeError:
-            kimplementsklass = tuple
-            kimplements = []
-        kimplements.append(interface)
-        klass.__implements__ = kimplementsklass(kimplements)
-        for subklass in klass.__subclasses__():
-            extend(subklass, interface, _recurs=True)
-    elif _recurs:
-        for subklass in klass.__subclasses__():
-            extend(subklass, interface, _recurs=True)