/usr/share/games/fretsonfire/game/Object.py is in fretsonfire-game 1.3.110.dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# -*- coding: iso-8859-1 -*- #
# #
# Frets on Fire #
# Copyright (C) 2006 Sami Kyöstilä #
# #
# 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. #
#####################################################################
import pickle
from StringIO import StringIO
class Serializer(pickle.Pickler):
def persistent_id(self, obj):
return getattr(obj, "id", None)
class Unserializer(pickle.Unpickler):
def __init__(self, manager, data):
pickle.Unpickler.__init__(self, data)
self.manager = manager
def persistent_load(self, id):
return self.manager.getObject(id)
def serialize(data):
file = StringIO()
Serializer(file, protocol = 2).dump(data)
return file.getvalue()
def unserialize(manager, data):
return Unserializer(manager, StringIO(data)).load()
class Manager:
MSG_CREATE = 0
MSG_CHANGE = 1
MSG_DELETE = 2
def __init__(self, id = 0):
self.id = id
self.reset()
def setId(self, id):
self.id = id
def reset(self):
self.objects = {}
self.__creationData = {}
self.__created = []
self.__changed = []
self.__deleted = []
self.__idCounter = 0
def createObject(self, instance, *args, **kwargs):
self.__idCounter += 1
id = self.globalObjectId(self.__idCounter)
self.objects[id] = instance
self.__creationData[id] = (instance.__class__, args, kwargs)
self.__created.append(instance)
return id
def setChanged(self, obj):
if not obj in self.__changed:
self.__changed.append(obj)
def deleteObject(self, obj):
del self.objects[obj.id]
del self.__creationData[obj.id]
if obj in self.__created: self.__created.remove(obj)
self.__deleted.append(obj.id)
def getObject(self, id):
return self.objects.get(id, None)
def getChanges(self, everything = False):
data = []
if everything:
data += [(self.MSG_CREATE, [(id, data) for id, data in self.__creationData.items()])]
data += [(self.MSG_CHANGE, [(o.id, o.getChanges(everything = True)) for o in self.objects.values()])]
else:
if self.__created: data += [(self.MSG_CREATE, [(o.id, self.__creationData[o.id]) for o in self.__created])]
if self.__changed: data += [(self.MSG_CHANGE, [(o.id, o.getChanges()) for o in self.__changed])]
if self.__deleted: data += [(self.MSG_DELETE, self.__deleted)]
self.__created = []
self.__changed = []
self.__deleted = []
return [serialize(d) for d in data]
def globalObjectId(self, objId):
return (self.id << 20) + objId
def applyChanges(self, managerId, data):
for d in data:
try:
msg, data = unserialize(self, d)
if msg == self.MSG_CREATE:
for id, data in data:
objectClass, args, kwargs = data
self.__creationData[id] = data
self.objects[id] = objectClass(id = id, manager = self, *args, **kwargs)
elif msg == self.MSG_CHANGE:
for id, data in data:
if data: self.objects[id].applyChanges(data)
elif msg == self.MSG_DELETE:
id = data
del self.__creationData[id]
del self.objects[id]
except Exception, e:
print "Exception %s while processing incoming changes from manager %s." % (str(e), managerId)
raise
def enableGlobalManager():
global manager
manager = Manager()
class Message:
classes = {}
def __init__(self):
if not self.__class__ in self.classes:
self.classes[self.__class__] = len(self.classes)
self.id = self.classes[self.__class__]
class ObjectCreated(Message):
pass
class ObjectDeleted(Message):
def __init__(self, obj):
self.object = obj
class Object(object):
def __init__(self, id = None, manager = None, *args, **kwargs):
self.__modified = {}
self.__messages = []
self.__messageMap = {}
self.__shared = []
#if not manager: manager = globals()["manager"]
self.manager = manager
self.id = id or manager.createObject(self, *args, **kwargs)
def share(self, *attr):
[(self.__shared.append(str(a)), self.__modified.__setitem__(a, self.__dict__[a])) for a in attr]
def __setattr__(self, attr, value):
if attr in getattr(self, "_Object__shared", {}):
self.__modified[attr] = value
self.manager.setChanged(self)
object.__setattr__(self, attr, value)
def delete(self):
self.emit(ObjectDeleted(self))
self.manager.deleteObject(self)
def getChanges(self, everything = False):
if self.__messages:
self.__modified["_Object__messages"] = self.__messages
self.__processMessages()
if everything:
return dict([(k, getattr(self, k)) for k in self.__shared])
if self.__modified:
(data, self.__modified) = (self.__modified, {})
return data
def applyChanges(self, data):
self.__dict__.update(data)
self.__processMessages()
def emit(self, message):
self.__messages.append(message)
def connect(self, messageClass, callback):
if not messageClass in self.__messageMap:
self.__messageMap[messageClass] = []
self.__messageMap[messageClass].append(callback)
def disconnect(self, messageClass, callback):
if messageClass in self.__messageMap:
self.__messageMap[messageClass].remove(callback)
def __processMessages(self):
for m in self.__messages:
if m.__class__ in self.__messageMap:
for c in self.__messageMap[m.__class__]:
c(m)
self.__messages = []
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