Preferences is a general module to get (and set) preferences in

resource files with various inheritence rules, parsers, etc.

pythonprefs uses this to create a single uniform interface to all
relevant python preferences.

Mac/Lib/pythonprefs.py

@@ -0,0 +1,122 @@
+from preferences import *
+
+# Names of Python resources
+PREFNAME_NAME="PythonPreferenceFileName"
+
+# Resource IDs in the preferences file
+PATH_ID = 128
+DIR_ID = 128
+POPT_ID = 128
+GUSI_ID = 10240
+
+# Override IDs (in the applet)
+OVERRIDE_PATH_ID = 129
+OVERRIDE_DIR_ID = 129
+OVERRIDE_POPT_ID = 129
+OVERRIDE_GUSI_ID = 10241
+
+# version
+CUR_VERSION=3
+
+preffilename = PstringLoader(AnyResLoader('STR ', resname=PREFNAME_NAME)).load()
+pref_fss = preferencefile(preffilename, 'Pyth', 'pref')
+
+class PoptLoader(VersionLoader):
+	def __init__(self, loader):
+		VersionLoader.__init__(self, "bbbbbbbbbb", loader)
+		
+	def versioncheck(self, data):
+		if data[0] == CUR_VERSION:
+			return data
+		print 'old resource'
+		raise Error, "old resource"
+		
+class GusiLoader:
+	def __init__(self, loader):
+		self.loader = loader
+		self.data = None
+		
+	def load(self):
+		self.data = self.loader.load()
+		while self.data[10:14] != '0181':
+			self.loader.delete(1)
+			self.loader.load()
+		tp = self.data[0:4]
+		cr = self.data[4:8]
+		flags = ord(self.data[9])
+		delay = ((flags & 0x20) == 0x20)
+		return cr, tp, delay
+		
+	def save(self, (cr, tp, delay)):
+		flags = ord(self.data[9])
+		if delay:
+			flags = flags | 0x20
+		else:
+			flags = flags & ~0x20
+		newdata = tp + cr + self.data[8] + chr(flags) + self.data[10:]
+		self.loader.save(newdata)
+		
+popt_default_default = NullLoader(chr(CUR_VERSION) + 8*'\0')
+popt_default = AnyResLoader('Popt', POPT_ID, default=popt_default_default)
+popt_loader = ResLoader(pref_fss, 'Popt', POPT_ID, default=popt_default)
+popt = PoptLoader(popt_loader)
+
+dir_default = AnyResLoader('alis', DIR_ID)
+dir = ResLoader(pref_fss, 'alis', DIR_ID, default=dir_default)
+
+gusi_default = AnyResLoader('GU\267I', GUSI_ID)
+gusi_loader = ResLoader(pref_fss, 'GU\267I', GUSI_ID, default=gusi_default)
+gusi = GusiLoader(gusi_loader)
+
+path_default = AnyResLoader('STR#', PATH_ID)
+path_loader = ResLoader(pref_fss, 'STR#', PATH_ID, default=path_default)
+path = StrListLoader(path_loader)
+
+class PythonOptions:
+	def __init__(self, popt=popt, dir=dir, gusi=gusi, path=path):
+		self.popt = popt
+		self.dir = dir
+		self.gusi = gusi
+		self.path = path
+		
+	def load(self):
+		dict = {}
+		dict['path'] = self.path.load()
+		diralias = self.dir.load()
+		dirfss, dummy = macfs.RawAlias(diralias).Resolve()
+		dict['dir'] = dirfss
+		dict['creator'], dict['type'], dict['delayconsole'] = self.gusi.load()
+		flags = self.popt.load()
+		dict['version'], dict['inspect'], dict['verbose'], dict['optimize'], \
+			dict['unbuffered'], dict['debugging'], dict['keepopen'], dict['keeperror'], \
+			dict['nointopt'], dict['noargs'] = flags
+		return dict
+		
+	def save(self, dict):
+		self.path.save(dict['path'])
+		diralias = macfs.FSSpec(dict['dir']).NewAlias().data
+		self.dir.save(diralias)
+		self.gusi.save((dict['creator'], dict['type'], dict['delayconsole']))
+		flags = dict['version'], dict['inspect'], dict['verbose'], dict['optimize'], \
+			dict['unbuffered'], dict['debugging'], dict['keepopen'], dict['keeperror'], \
+			dict['nointopt'], dict['noargs'] 
+		self.popt.save(flags)
+
+def AppletOptions(file):
+	fss = macfs.FSSpec(file)
+	a_popt = PoptLoader(ResLoader(fss, 'Popt', OVERRIDE_POPT_ID, default=popt_loader))
+	a_dir = ResLoader(fss, 'alis', OVERRIDE_DIR_ID, default=dir)
+	a_gusi = ResLoader(fss, 'GU\267I', OVERRIDE_GUSI_ID, default=gusi_loader)
+	a_path = StrListLoader(fss, 'STR#', OVERRIDE_PATH_ID, default=path_loader)
+	return PythonOptions(a_popt, a_dir, a_gusi, a_path)
+	
+def _test():
+	import preferences
+	preferences.debug = 1
+	dict = PythonOptions().load()
+	for k in dict.keys():
+		print k, '\t', dict[k]
+		
+if __name__ == '__main__':
+	_test()
+