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"""Copyright (c) 2010-2012 David Rio Vierra
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE."""
"""
config.py
Configuration settings and storage.
"""
import os
import logging
import collections
import ConfigParser
from cStringIO import StringIO
import mcplatform
from albow import alert
log = logging.getLogger(__name__)
def configFilePath():
return mcplatform.configFilePath
def loadConfig():
class keyDict (collections.MutableMapping):
def __init__(self, *args, **kwargs):
self.dict = dict(*args, **kwargs)
self.keyorder = []
def keys(self):
return list(self.keyorder)
def items(self):
return list(self.__iteritems__())
def __iteritems__(self):
return ((k, self.dict[k]) for k in self.keys())
def __iter__(self):
return self.keys().__iter__()
def __getitem__(self, k):
return self.dict[k]
def __setitem__(self, k, v):
self.dict[k] = v
if not k in self.keyorder:
self.keyorder.append(k)
def __delitem__(self, k):
del self.dict[k]
if k in self.keyorder:
self.keyorder.remove(k)
def __contains__(self, k):
return self.dict.__contains__(k)
def __len__(self):
return self.dict.__len__()
def copy(self):
k = keyDict()
k.dict = self.dict.copy()
k.keyorder = list(self.keyorder)
return k
config = ConfigParser.RawConfigParser([], keyDict)
config.readfp(StringIO(configDefaults))
try:
config.read(configFilePath())
except Exception, e:
log.warn(u"Error while reading configuration file mcedit.ini: {0}".format(e))
return config
def updateConfig():
pass
def saveConfig():
try:
cf = file(configFilePath(), 'w')
config.write(cf)
cf.close()
except Exception, e:
try:
alert(u"Error saving configuration settings to mcedit.ini: {0}".format(e))
except:
pass
configDefaults = """
[Keys]
forward = w
back = s
left = a
right = d
up = q
down = z
brake = space
rotate = e
roll = r
flip = f
mirror = g
swap = x
pan left = j
pan right = l
pan up = i
pan down = k
reset reach = mouse3
increase reach = mouse4
decrease reach = mouse5
confirm construction = return
open level = o
new level = n
delete blocks = delete
toggle fps counter = 0
toggle renderer = m
"""
log.info("Loading config...")
config = loadConfig()
config.observers = {}
def _propertyRef(section, name, dtype=str, default=None):
class PropRef(object):
def get(self):
return _getProperty(section, name, dtype, default)
def set(self, val):
_setProperty(section, name, val)
return PropRef()
def _configProperty(section, name, dtype=str, setter=None, default=None):
assert default is not None
def _getter(self):
return _getProperty(section, name, dtype, default)
def _setter(self, val):
_setProperty(section, name, val)
if setter:
setter(self, val)
return property(_getter, _setter, None)
def _getProperty(section, name, dtype=str, default=None):
try:
if dtype is bool:
return config.getboolean(section, name)
else:
return dtype(config.get(section, name))
except:
if default is None:
raise
_setProperty(section, name, default)
return default
def _setProperty(section, name, value):
log.debug("Property Change: %15s %30s = %s", section, name, value)
config.set(section, name, str(value))
_notifyObservers(section, name, value)
def _notifyObservers(section, name, value):
observers = config.observers.get((section.lower(), name.lower()), {})
newObservers = {}
for targetref, attr in observers:
target = targetref()
if target:
log.debug("Notifying %s", target)
setattr(target, attr, value)
callback = observers[targetref, attr]
if callback:
callback(value)
newObservers[targetref, attr] = callback
config.observers[(section, name)] = newObservers
import weakref
def addObserver(section, name, target, attr=None, dtype=str, callback=None, default=None):
""" Register 'target' for changes in the config var named by section and name.
When the config is changed, calls setattr with target and attr.
attr may be None; it will be created from the name by lowercasing the first
word, uppercasing the rest, and removing spaces.
e.g. "block buffer" becomes "blockBuffer"
"""
observers = config.observers.setdefault((section.lower(), name.lower()), {})
if not attr:
tokens = name.lower().split()
attr = tokens[0] + "".join(t.title() for t in tokens[1:])
log.debug("Subscribing %s.%s", target, attr)
attr = intern(attr)
targetref = weakref.ref(target)
observers.setdefault((targetref, attr), callback)
val = _getProperty(section, name, dtype, default)
setattr(target, attr, val)
if callback:
callback(val)
class Setting(object):
def __init__(self, section, name, dtype, default):
self.section = section
self.name = name
self.dtype = dtype
self.default = default
def __repr__(self):
return "Setting(" + ", ".join(str(s) for s in (self.section, self.name, self.dtype, self.default))
def addObserver(self, target, attr=None, callback=None):
addObserver(self.section, self.name, target, attr, self.dtype, callback, self.default)
def get(self):
return _getProperty(self.section, self.name, self.dtype, self.default)
def set(self, val):
return _setProperty(self.section, self.name, self.dtype(val))
def propertyRef(self):
return _propertyRef(self.section, self.name, self.dtype, self.default)
def configProperty(self, setter=None):
return _configProperty(self.section, self.name, self.dtype, setter, self.default)
def __int__(self):
return int(self.get())
def __float__(self):
return float(self.get())
def __bool__(self):
return bool(self.get())
class Settings(object):
Setting = Setting
def __init__(self, section):
self.section = section
def __call__(self, name, default):
assert default is not None
dtype = type(default)
section = self.section
s = self.Setting(section, name, dtype, default)
if not config.has_section(section):
config.add_section(section)
if not config.has_option(section, name):
s.set(default)
return s
def __setattr__(self, attr, val):
if hasattr(self, attr):
old = getattr(self, attr)
if isinstance(old, Setting):
if isinstance(val, Setting):
raise ValueError("Attempting to reassign setting %s with %s" % (old, val))
log.warn("Setting attr %s via __setattr__ instead of set()!", attr)
return old.set(val)
log.debug("Setting {%s => %s}" % (attr, val))
return object.__setattr__(self, attr, val)
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