merged with Trevor branch

1 files changed, 0 insertions, 638 deletions

diff --git a/interfaces/email/interactive/libbe/properties.py b/interfaces/email/interactive/libbe/properties.py
deleted file mode 100644
index 09dd20e..0000000
--- a/interfaces/email/interactive/libbe/properties.py
+++ /dev/null
@@ -1,638 +0,0 @@
-# Bugs Everywhere - a distributed bugtracker
-# Copyright (C) 2008-2009 W. Trevor King <wking@drexel.edu>
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program 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 General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-"""
-This module provides a series of useful decorators for defining
-various types of properties.  For example usage, consider the
-unittests at the end of the module.
-
-See
-  http://www.python.org/dev/peps/pep-0318/
-and
-  http://www.phyast.pitt.edu/~micheles/python/documentation.html
-for more information on decorators.
-"""
-
-import copy
-import types
-import unittest
-
-
-class ValueCheckError (ValueError):
-    def __init__(self, name, value, allowed):
-        action = "in" # some list of allowed values
-        if type(allowed) == types.FunctionType:
-            action = "allowed by" # some allowed-value check function
-        msg = "%s not %s %s for %s" % (value, action, allowed, name)
-        ValueError.__init__(self, msg)
-        self.name = name
-        self.value = value
-        self.allowed = allowed
-
-def Property(funcs):
-    """
-    End a chain of property decorators, returning a property.
-    """
-    args = {}
-    args["fget"] = funcs.get("fget", None)
-    args["fset"] = funcs.get("fset", None)
-    args["fdel"] = funcs.get("fdel", None)
-    args["doc"] = funcs.get("doc", None)
-
-    #print "Creating a property with"
-    #for key, val in args.items(): print key, value
-    return property(**args)
-
-def doc_property(doc=None):
-    """
-    Add a docstring to a chain of property decorators.
-    """
-    def decorator(funcs=None):
-        """
-        Takes either a dict of funcs {"fget":fnX, "fset":fnY, ...}
-        or a function fn() returning such a dict.
-        """
-        if hasattr(funcs, "__call__"):
-            funcs = funcs() # convert from function-arg to dict
-        funcs["doc"] = doc
-        return funcs
-    return decorator
-
-def local_property(name, null=None, mutable_null=False):
-    """
-    Define get/set access to per-parent-instance local storage.  Uses
-    ._<name>_value to store the value for a particular owner instance.
-    If the ._<name>_value attribute does not exist, returns null.
-
-    If mutable_null == True, we only release deepcopies of the null to
-    the outside world.
-    """
-    def decorator(funcs):
-        if hasattr(funcs, "__call__"):
-            funcs = funcs()
-        fget = funcs.get("fget", None)
-        fset = funcs.get("fset", None)
-        def _fget(self):
-            if fget is not None:
-                fget(self)
-            if mutable_null == True:
-                ret_null = copy.deepcopy(null)
-            else:
-                ret_null = null
-            value = getattr(self, "_%s_value" % name, ret_null)
-            return value
-        def _fset(self, value):
-            setattr(self, "_%s_value" % name, value)
-            if fset is not None:
-                fset(self, value)
-        funcs["fget"] = _fget
-        funcs["fset"] = _fset
-        funcs["name"] = name
-        return funcs
-    return decorator
-
-def settings_property(name, null=None):
-    """
-    Similar to local_property, except where local_property stores the
-    value in instance._<name>_value, settings_property stores the
-    value in instance.settings[name].
-    """
-    def decorator(funcs):
-        if hasattr(funcs, "__call__"):
-            funcs = funcs()
-        fget = funcs.get("fget", None)
-        fset = funcs.get("fset", None)
-        def _fget(self):
-            if fget is not None:
-                fget(self)
-            value = self.settings.get(name, null)
-            return value
-        def _fset(self, value):
-            self.settings[name] = value
-            if fset is not None:
-                fset(self, value)
-        funcs["fget"] = _fget
-        funcs["fset"] = _fset
-        funcs["name"] = name
-        return funcs
-    return decorator
-
-
-# Allow comparison and caching with _original_ values for mutables,
-# since
-#
-# >>> a = []
-# >>> b = a
-# >>> b.append(1)
-# >>> a
-# [1]
-# >>> a==b
-# True
-def _hash_mutable_value(value):
-    return repr(value)
-def _init_mutable_property_cache(self):
-    if not hasattr(self, "_mutable_property_cache_hash"):
-        # first call to _fget for any mutable property
-        self._mutable_property_cache_hash = {}
-        self._mutable_property_cache_copy = {}
-def _set_cached_mutable_property(self, cacher_name, property_name, value):
-    _init_mutable_property_cache(self)
-    self._mutable_property_cache_hash[(cacher_name, property_name)] = \
-        _hash_mutable_value(value)
-    self._mutable_property_cache_copy[(cacher_name, property_name)] = \
-        copy.deepcopy(value)
-def _get_cached_mutable_property(self, cacher_name, property_name, default=None):
-    _init_mutable_property_cache(self)
-    if (cacher_name, property_name) not in self._mutable_property_cache_copy:
-        return default
-    return self._mutable_property_cache_copy[(cacher_name, property_name)]
-def _cmp_cached_mutable_property(self, cacher_name, property_name, value, default=None):
-    _init_mutable_property_cache(self)
-    if (cacher_name, property_name) not in self._mutable_property_cache_hash:
-        _set_cached_mutable_property(self, cacher_name, property_name, default)
-    old_hash = self._mutable_property_cache_hash[(cacher_name, property_name)]
-    return cmp(_hash_mutable_value(value), old_hash)
-
-
-def defaulting_property(default=None, null=None,
-                        mutable_default=False):
-    """
-    Define a default value for get access to a property.
-    If the stored value is null, then default is returned.
-
-    If mutable_default == True, we only release deepcopies of the
-    default to the outside world.
-
-    null should never escape to the outside world, so don't worry
-    about it being a mutable.
-    """
-    def decorator(funcs):
-        if hasattr(funcs, "__call__"):
-            funcs = funcs()
-        fget = funcs.get("fget")
-        fset = funcs.get("fset")
-        name = funcs.get("name", "<unknown>")
-        def _fget(self):
-            value = fget(self)
-            if value == null:
-                if mutable_default == True:
-                    return copy.deepcopy(default)
-                else:
-                    return default
-            return value
-        def _fset(self, value):
-            if value == default:
-                value = null
-            fset(self, value)
-        funcs["fget"] = _fget
-        funcs["fset"] = _fset
-        return funcs
-    return decorator
-
-def fn_checked_property(value_allowed_fn):
-    """
-    Define allowed values for get/set access to a property.
-    """
-    def decorator(funcs):
-        if hasattr(funcs, "__call__"):
-            funcs = funcs()
-        fget = funcs.get("fget")
-        fset = funcs.get("fset")
-        name = funcs.get("name", "<unknown>")
-        def _fget(self):
-            value = fget(self)
-            if value_allowed_fn(value) != True:
-                raise ValueCheckError(name, value, value_allowed_fn)
-            return value
-        def _fset(self, value):
-            if value_allowed_fn(value) != True:
-                raise ValueCheckError(name, value, value_allowed_fn)
-            fset(self, value)
-        funcs["fget"] = _fget
-        funcs["fset"] = _fset
-        return funcs
-    return decorator
-
-def checked_property(allowed=[]):
-    """
-    Define allowed values for get/set access to a property.
-    """
-    def decorator(funcs):
-        if hasattr(funcs, "__call__"):
-            funcs = funcs()
-        fget = funcs.get("fget")
-        fset = funcs.get("fset")
-        name = funcs.get("name", "<unknown>")
-        def _fget(self):
-            value = fget(self)
-            if value not in allowed:
-                raise ValueCheckError(name, value, allowed)
-            return value
-        def _fset(self, value):
-            if value not in allowed:
-                raise ValueCheckError(name, value, allowed)
-            fset(self, value)
-        funcs["fget"] = _fget
-        funcs["fset"] = _fset
-        return funcs
-    return decorator
-
-def cached_property(generator, initVal=None, mutable=False):
-    """
-    Allow caching of values generated by generator(instance), where
-    instance is the instance to which this property belongs.  Uses
-    ._<name>_cache to store a cache flag for a particular owner
-    instance.
-
-    When the cache flag is True or missing and the stored value is
-    initVal, the first fget call triggers the generator function,
-    whose output is stored in _<name>_cached_value.  That and
-    subsequent calls to fget will return this cached value.
-
-    If the input value is no longer initVal (e.g. a value has been
-    loaded from disk or set with fset), that value overrides any
-    cached value, and this property has no effect.
-
-    When the cache flag is False and the stored value is initVal, the
-    generator is not cached, but is called on every fget.
-
-    The cache flag is missing on initialization.  Particular instances
-    may override by setting their own flag.
-
-    In the case that mutable == True, all caching is disabled and the
-    generator is called whenever the cached value would otherwise be
-    used.
-    """
-    def decorator(funcs):
-        if hasattr(funcs, "__call__"):
-            funcs = funcs()
-        fget = funcs.get("fget")
-        name = funcs.get("name", "<unknown>")
-        def _fget(self):
-            cache = getattr(self, "_%s_cache" % name, True)
-            value = fget(self)
-            if value == initVal:
-                if cache == True and mutable == False:
-                    if hasattr(self, "_%s_cached_value" % name):
-                        value = getattr(self, "_%s_cached_value" % name)
-                    else:
-                        value = generator(self)
-                        setattr(self, "_%s_cached_value" % name, value)
-                else:
-                    value = generator(self)
-            return value
-        funcs["fget"] = _fget
-        return funcs
-    return decorator
-
-def primed_property(primer, initVal=None):
-    """
-    Just like a cached_property, except that instead of returning a
-    new value and running fset to cache it, the primer performs some
-    background manipulation (e.g. loads data into instance.settings)
-    such that a _second_ pass through fget succeeds.
-
-    The 'cache' flag becomes a 'prime' flag, with priming taking place
-    whenever ._<name>_prime is True, or is False or missing and
-    value == initVal.
-    """
-    def decorator(funcs):
-        if hasattr(funcs, "__call__"):
-            funcs = funcs()
-        fget = funcs.get("fget")
-        name = funcs.get("name", "<unknown>")
-        def _fget(self):
-            prime = getattr(self, "_%s_prime" % name, False)
-            if prime == False:
-                value = fget(self)
-            if prime == True or (prime == False and value == initVal):
-                primer(self)
-                value = fget(self)
-            return value
-        funcs["fget"] = _fget
-        return funcs
-    return decorator
-
-def change_hook_property(hook, mutable=False, default=None):
-    """
-    Call the function hook(instance, old_value, new_value) whenever a
-    value different from the current value is set (instance is a a
-    reference to the class instance to which this property belongs).
-    This is useful for saving changes to disk, etc.  This function is
-    called _after_ the new value has been stored, allowing you to
-    change the stored value if you want.
-
-    In the case of mutables, things are slightly trickier.  Because
-    the property-owning class has no way of knowing when the value
-    changes.  We work around this by caching a private deepcopy of the
-    mutable value, and checking for changes whenever the property is
-    set (obviously) or retrieved (to check for external changes).  So
-    long as you're conscientious about accessing the property after
-    making external modifications, mutability woln't be a problem.
-      t.x.append(5) # external modification
-      t.x           # dummy access notices change and triggers hook
-    See testChangeHookMutableProperty for an example of the expected
-    behavior.
-    """
-    def decorator(funcs):
-        if hasattr(funcs, "__call__"):
-            funcs = funcs()
-        fget = funcs.get("fget")
-        fset = funcs.get("fset")
-        name = funcs.get("name", "<unknown>")
-        def _fget(self, new_value=None, from_fset=False): # only used if mutable == True
-            if from_fset == True:
-                value = new_value # compare new value with cached
-            else:
-                value = fget(self) # compare current value with cached
-            if _cmp_cached_mutable_property(self, "change hook property", name, value, default) != 0:
-                # there has been a change, cache new value
-                old_value = _get_cached_mutable_property(self, "change hook property", name, default)
-                _set_cached_mutable_property(self, "change hook property", name, value)
-                if from_fset == True: # return previously cached value
-                    value = old_value
-                else: # the value changed while we weren't looking
-                    hook(self, old_value, value)
-            return value
-        def _fset(self, value):
-            if mutable == True: # get cached previous value
-                old_value = _fget(self, new_value=value, from_fset=True)
-            else:
-                old_value = fget(self)
-            fset(self, value)
-            if value != old_value:
-                hook(self, old_value, value)
-        if mutable == True:
-            funcs["fget"] = _fget
-        funcs["fset"] = _fset
-        return funcs
-    return decorator
-
-
-class DecoratorTests(unittest.TestCase):
-    def testLocalDoc(self):
-        class Test(object):
-            @Property
-            @doc_property("A fancy property")
-            def x():
-                return {}
-        self.failUnless(Test.x.__doc__ == "A fancy property",
-                        Test.x.__doc__)
-    def testLocalProperty(self):
-        class Test(object):
-            @Property
-            @local_property(name="LOCAL")
-            def x():
-                return {}
-        t = Test()
-        self.failUnless(t.x == None, str(t.x))
-        t.x = 'z' # the first set initializes ._LOCAL_value
-        self.failUnless(t.x == 'z', str(t.x))
-        self.failUnless("_LOCAL_value" in dir(t), dir(t))
-        self.failUnless(t._LOCAL_value == 'z', t._LOCAL_value)
-    def testSettingsProperty(self):
-        class Test(object):
-            @Property
-            @settings_property(name="attr")
-            def x():
-                return {}
-            def __init__(self):
-                self.settings = {}
-        t = Test()
-        self.failUnless(t.x == None, str(t.x))
-        t.x = 'z' # the first set initializes ._LOCAL_value
-        self.failUnless(t.x == 'z', str(t.x))
-        self.failUnless("attr" in t.settings, t.settings)
-        self.failUnless(t.settings["attr"] == 'z', t.settings["attr"])
-    def testDefaultingLocalProperty(self):
-        class Test(object):
-            @Property
-            @defaulting_property(default='y', null='x')
-            @local_property(name="DEFAULT", null=5)
-            def x(): return {}
-        t = Test()
-        self.failUnless(t.x == 5, str(t.x))
-        t.x = 'x'
-        self.failUnless(t.x == 'y', str(t.x))
-        t.x = 'y'
-        self.failUnless(t.x == 'y', str(t.x))
-        t.x = 'z'
-        self.failUnless(t.x == 'z', str(t.x))
-        t.x = 5
-        self.failUnless(t.x == 5, str(t.x))
-    def testCheckedLocalProperty(self):
-        class Test(object):
-            @Property
-            @checked_property(allowed=['x', 'y', 'z'])
-            @local_property(name="CHECKED")
-            def x(): return {}
-            def __init__(self):
-                self._CHECKED_value = 'x'
-        t = Test()
-        self.failUnless(t.x == 'x', str(t.x))
-        try:
-            t.x = None
-            e = None
-        except ValueCheckError, e:
-            pass
-        self.failUnless(type(e) == ValueCheckError, type(e))
-    def testTwoCheckedLocalProperties(self):
-        class Test(object):
-            @Property
-            @checked_property(allowed=['x', 'y', 'z'])
-            @local_property(name="X")
-            def x(): return {}
-
-            @Property
-            @checked_property(allowed=['a', 'b', 'c'])
-            @local_property(name="A")
-            def a(): return {}
-            def __init__(self):
-                self._A_value = 'a'
-                self._X_value = 'x'
-        t = Test()
-        try:
-            t.x = 'a'
-            e = None
-        except ValueCheckError, e:
-            pass
-        self.failUnless(type(e) == ValueCheckError, type(e))
-        t.x = 'x'
-        t.x = 'y'
-        t.x = 'z'
-        try:
-            t.a = 'x'
-            e = None
-        except ValueCheckError, e:
-            pass
-        self.failUnless(type(e) == ValueCheckError, type(e))
-        t.a = 'a'
-        t.a = 'b'
-        t.a = 'c'
-    def testFnCheckedLocalProperty(self):
-        class Test(object):
-            @Property
-            @fn_checked_property(lambda v : v in ['x', 'y', 'z'])
-            @local_property(name="CHECKED")
-            def x(): return {}
-            def __init__(self):
-                self._CHECKED_value = 'x'
-        t = Test()
-        self.failUnless(t.x == 'x', str(t.x))
-        try:
-            t.x = None
-            e = None
-        except ValueCheckError, e:
-            pass
-        self.failUnless(type(e) == ValueCheckError, type(e))
-    def testCachedLocalProperty(self):
-        class Gen(object):
-            def __init__(self):
-                self.i = 0
-            def __call__(self, owner):
-                self.i += 1
-                return self.i
-        class Test(object):
-            @Property
-            @cached_property(generator=Gen(), initVal=None)
-            @local_property(name="CACHED")
-            def x(): return {}
-        t = Test()
-        self.failIf("_CACHED_cache" in dir(t), getattr(t, "_CACHED_cache", None))
-        self.failUnless(t.x == 1, t.x)
-        self.failUnless(t.x == 1, t.x)
-        self.failUnless(t.x == 1, t.x)
-        t.x = 8
-        self.failUnless(t.x == 8, t.x)
-        self.failUnless(t.x == 8, t.x)
-        t._CACHED_cache = False        # Caching is off, but the stored value
-        val = t.x                      # is 8, not the initVal (None), so we
-        self.failUnless(val == 8, val) # get 8.
-        t._CACHED_value = None         # Now we've set the stored value to None
-        val = t.x                      # so future calls to fget (like this)
-        self.failUnless(val == 2, val) # will call the generator every time...
-        val = t.x
-        self.failUnless(val == 3, val)
-        val = t.x
-        self.failUnless(val == 4, val)
-        t._CACHED_cache = True              # We turn caching back on, and get
-        self.failUnless(t.x == 1, str(t.x)) # the original cached value.
-        del t._CACHED_cached_value          # Removing that value forces a
-        self.failUnless(t.x == 5, str(t.x)) # single cache-regenerating call
-        self.failUnless(t.x == 5, str(t.x)) # to the genenerator, after which
-        self.failUnless(t.x == 5, str(t.x)) # we get the new cached value.
-    def testPrimedLocalProperty(self):
-        class Test(object):
-            def prime(self):
-                self.settings["PRIMED"] = "initialized"
-            @Property
-            @primed_property(primer=prime, initVal=None)
-            @settings_property(name="PRIMED")
-            def x(): return {}
-            def __init__(self):
-                self.settings={}
-        t = Test()
-        self.failIf("_PRIMED_prime" in dir(t), getattr(t, "_PRIMED_prime", None))
-        self.failUnless(t.x == "initialized", t.x)
-        t.x = 1
-        self.failUnless(t.x == 1, t.x)
-        t.x = None
-        self.failUnless(t.x == "initialized", t.x)
-        t._PRIMED_prime = True
-        t.x = 3
-        self.failUnless(t.x == "initialized", t.x)
-        t._PRIMED_prime = False
-        t.x = 3
-        self.failUnless(t.x == 3, t.x)
-    def testChangeHookLocalProperty(self):
-        class Test(object):
-            def _hook(self, old, new):
-                self.old = old
-                self.new = new
-
-            @Property
-            @change_hook_property(_hook)
-            @local_property(name="HOOKED")
-            def x(): return {}
-        t = Test()
-        t.x = 1
-        self.failUnless(t.old == None, t.old)
-        self.failUnless(t.new == 1, t.new)
-        t.x = 1
-        self.failUnless(t.old == None, t.old)
-        self.failUnless(t.new == 1, t.new)
-        t.x = 2
-        self.failUnless(t.old == 1, t.old)
-        self.failUnless(t.new == 2, t.new)
-    def testChangeHookMutableProperty(self):
-        class Test(object):
-            def _hook(self, old, new):
-                self.old = old
-                self.new = new
-                self.hook_calls += 1
-
-            @Property
-            @change_hook_property(_hook, mutable=True)
-            @local_property(name="HOOKED")
-            def x(): return {}
-        t = Test()
-        t.hook_calls = 0
-        t.x = []
-        self.failUnless(t.old == None, t.old)
-        self.failUnless(t.new == [], t.new)
-        self.failUnless(t.hook_calls == 1, t.hook_calls)
-        a = t.x
-        a.append(5)
-        t.x = a
-        self.failUnless(t.old == [], t.old)
-        self.failUnless(t.new == [5], t.new)
-        self.failUnless(t.hook_calls == 2, t.hook_calls)
-        t.x = []
-        self.failUnless(t.old == [5], t.old)
-        self.failUnless(t.new == [], t.new)
-        self.failUnless(t.hook_calls == 3, t.hook_calls)
-        # now append without reassigning.  this doesn't trigger the
-        # change, since we don't ever set t.x, only get it and mess
-        # with it.  It does, however, update our t.new, since t.new =
-        # t.x and is not a static copy.
-        t.x.append(5)
-        self.failUnless(t.old == [5], t.old)
-        self.failUnless(t.new == [5], t.new)
-        self.failUnless(t.hook_calls == 3, t.hook_calls)
-        # however, the next t.x get _will_ notice the change...
-        a = t.x
-        self.failUnless(t.old == [], t.old)
-        self.failUnless(t.new == [5], t.new)
-        self.failUnless(t.hook_calls == 4, t.hook_calls)
-        t.x.append(6) # this append(6) is not noticed yet
-        self.failUnless(t.old == [], t.old)
-        self.failUnless(t.new == [5,6], t.new)
-        self.failUnless(t.hook_calls == 4, t.hook_calls)
-        # this append(7) is not noticed, but the t.x get causes the
-        # append(6) to be noticed
-        t.x.append(7)
-        self.failUnless(t.old == [5], t.old)
-        self.failUnless(t.new == [5,6,7], t.new)
-        self.failUnless(t.hook_calls == 5, t.hook_calls)
-        a = t.x # now the append(7) is noticed
-        self.failUnless(t.old == [5,6], t.old)
-        self.failUnless(t.new == [5,6,7], t.new)
-        self.failUnless(t.hook_calls == 6, t.hook_calls)
-
-
-suite = unittest.TestLoader().loadTestsFromTestCase(DecoratorTests)
-