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import macfs
import marshal
import types
from MACFS import kOnSystemDisk
class PrefObject:
def __init__(self, dict = None):
if dict == None:
self._prefsdict = {}
else:
self._prefsdict = dict
def __len__(self):
return len(self._prefsdict)
def __delattr__(self, attr):
if self._prefsdict.has_key(attr):
del self._prefsdict[attr]
else:
raise AttributeError, 'delete non-existing instance attribute'
def __getattr__(self, attr):
if attr == '__members__':
keys = self._prefsdict.keys()
keys.sort()
return keys
try:
return self._prefsdict[attr]
except KeyError:
raise AttributeError, attr
def __setattr__(self, attr, value):
if attr[0] <> '_':
self._prefsdict[attr] = value
else:
self.__dict__[attr] = value
def getprefsdict(self):
return self._prefsdict
class PrefFile(PrefObject):
def __init__(self, path, creator = 'Pyth'):
# Find the preferences folder and our prefs file, create if needed.
self.__path = path
self.__creator = creator
self._prefsdict = {}
try:
prefdict = marshal.load(open(self.__path, 'rb'))
except (IOError, ValueError):
# file not found, or currupt marshal data
pass
else:
for key, value in prefdict.items():
if type(value) == types.DictType:
self._prefsdict[key] = PrefObject(value)
else:
self._prefsdict[key] = value
def save(self):
prefdict = {}
for key, value in self._prefsdict.items():
if type(value) == types.InstanceType:
prefdict[key] = value.getprefsdict()
if not prefdict[key]:
del prefdict[key]
else:
prefdict[key] = value
marshal.dump(prefdict, open(self.__path, 'wb'))
fss = macfs.FSSpec(macfs.FSRef(self.__path))
fss.SetCreatorType(self.__creator, 'pref')
def __getattr__(self, attr):
if attr == '__members__':
keys = self._prefsdict.keys()
keys.sort()
return keys
try:
return self._prefsdict[attr]
except KeyError:
if attr[0] <> '_':
self._prefsdict[attr] = PrefObject()
return self._prefsdict[attr]
else:
raise AttributeError, attr
_prefscache = {}
def GetPrefs(prefname, creator = 'Pyth'):
import macostools, os
if _prefscache.has_key(prefname):
return _prefscache[prefname]
# Find the preferences folder and our prefs file, create if needed.
vrefnum, dirid = macfs.FindFolder(kOnSystemDisk, 'pref', 0)
prefsfolder_fss = macfs.FSSpec((vrefnum, dirid, ''))
prefsfolder = macfs.FSRef(prefsfolder_fss).as_fsspec().as_pathname()
path = os.path.join(prefsfolder, prefname)
head, tail = os.path.split(path)
# make sure the folder(s) exist
macostools.mkdirs(head)
preffile = PrefFile(path, creator)
_prefscache[prefname] = preffile
return preffile
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