/usr/share/pyshared/zope/location/location.py is in python-zope.location 3.9.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | ##############################################################################
#
# Copyright (c) 2003-2009 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Location support
"""
__docformat__ = 'restructuredtext'
import zope.interface
import zope.component
# XXX import error when doing import zope.location.interfaces :/
from zope.location.interfaces import ILocation
from zope.proxy import ProxyBase, non_overridable
from zope.proxy.decorator import DecoratorSpecificationDescriptor
class Location(object):
"""Mix-in that implements ILocation.
It provides the `__parent__` and `__name__` attributes.
"""
zope.interface.implements(ILocation)
__parent__ = None
__name__ = None
def locate(obj, parent, name=None):
"""Update a location's coordinates."""
obj.__parent__ = parent
obj.__name__ = name
def located(obj, parent, name=None):
"""Ensure and return the location of an object.
Updates the location's coordinates.
"""
location = zope.location.interfaces.ILocation(obj)
locate(location, parent, name)
return location
def LocationIterator(object):
"""Iterate over an object and all of its parents."""
while object is not None:
yield object
object = getattr(object, '__parent__', None)
def inside(l1, l2):
"""Test whether l1 is a successor of l2.
l1 is a successor of l2 if l2 is in the chain of parents of l1 or l2
is l1.
"""
while l1 is not None:
if l1 is l2:
return True
l1 = l1.__parent__
return False
class ClassAndInstanceDescr(object):
def __init__(self, *args):
self.funcs = args
def __get__(self, inst, cls):
if inst is None:
return self.funcs[1](cls)
return self.funcs[0](inst)
class LocationProxy(ProxyBase):
"""Location-object proxy
This is a non-picklable proxy that can be put around objects that
don't implement `ILocation`.
"""
zope.component.adapts(zope.interface.Interface)
zope.interface.implements(ILocation)
__slots__ = '__parent__', '__name__'
__safe_for_unpickling__ = True
def __new__(self, ob, container=None, name=None):
return ProxyBase.__new__(self, ob)
def __init__(self, ob, container=None, name=None):
ProxyBase.__init__(self, ob)
self.__parent__ = container
self.__name__ = name
@non_overridable
def __reduce__(self, proto=None):
raise TypeError("Not picklable")
__doc__ = ClassAndInstanceDescr(
lambda inst: getProxiedObject(inst).__doc__,
lambda cls, __doc__ = __doc__: __doc__,
)
__reduce_ex__ = __reduce__
__providedBy__ = DecoratorSpecificationDescriptor()
|