scyther/gui/Gui/Preference.py

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#!/usr/bin/python
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"""
Scyther : An automatic verifier for security protocols.
Copyright (C) 2007 Cas Cremers
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.
"""
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"""
Preferences window and logic for saving and loading such things.
Thus, some default things can be set here.
init loads stuff
save save the settings after some changes
set(k,v)
get(k)
Currently used:
match
maxruns
scytheroptions
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bindir where the scyther executables reside
splashscreen 0/1
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"""
#---------------------------------------------------------------------------
""" Import externals """
import wx
import os.path
import sys
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from time import localtime,strftime
#---------------------------------------------------------------------------
""" Import scyther-gui components """
import Makeimage
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#---------------------------------------------------------------------------
""" Globals """
# Do we have the Python Imaging library?
havePIL = True
testPILOkay = None
try:
import Image
except ImportError:
havePIL = False
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""" Locations of preferences. The last one is supposedly writable. """
prefname = "scythergui-config"
preflocs = []
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#---------------------------------------------------------------------------
def usePIL():
"""
Determine whether or not we should use the PIL library
"""
global havePIL, testPILOkay
if not havePIL:
return False
# Only if we have it, and it is windows.
if not sys.platform.startswith("lin"):
return False
# Seems fine. But did we already test it?
if testPILOkay != None:
return testPILOkay
# Test the usage
testPILOkay = True
testPILOkay = testPIL()
return testPILOkay
def doNotUsePIL():
"""
Disable
"""
global havePIL
havePIL = False
def testPIL():
"""
Test whether PIL works as we want it.
We generate a postscript file from a dot file, and see what happens.
"""
# depends on PIL lib
okay = True
try:
Makeimage.testImage()
# PIL seems fine
except:
# PIL broke
doNotUsePIL()
okay = False
return okay
#---------------------------------------------------------------------------
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class Preferences(dict):
def parse(self,line):
line = line.strip()
""" Skip comments """
if not line.startswith("#"):
split = line.find("=")
if split != -1:
key = line[:split].strip()
data = line[(split+1):]
self[key] = data.decode("string_escape")
#print "Read %s=%s" % (key,self[key])
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def load(self,file=""):
if file == None:
self["test1"] = "Dit is met een ' en een \", en dan\nde eerste dinges"
self["test2"] = "En dit de tweede"
elif file == "":
"""
Test default locations
"""
for f in preflocs:
self.load(os.path.join(f,prefname))
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else:
"""
Read this file
"""
if os.path.isfile(file):
fp = open(file,"r")
for l in fp.readlines():
self.parse(l)
fp.close()
def show(self):
print "Preferences:"
for k in self.keys():
print "%s=%s" % (k, self[k])
def save(self):
print "Saving preferences"
prefpath = preflocs[-1]
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if not os.access(prefpath,os.W_OK):
os.makedirs(prefpath)
savename = os.path.join(prefpath,prefname)
fp = open(savename,"w")
fp.write("# Scyther-gui configuration file.\n#\n")
date = strftime("%c",localtime())
fp.write("# Last written on %s\n" % (date))
fp.write("# Do not edit - any changes will be overwritten by Scyther-gui\n\n")
l = list(self.keys())
l.sort()
for k in l:
fp.write("%s=%s\n" % (k, self[k].encode("string_escape")))
fp.close()
def init():
"""
Load the preferences from a file, if possible
"""
global prefs,preflocs
sp = wx.StandardPaths.Get()
confdir = sp.GetConfigDir()
confdir += "/scyther"
#print confdir
userconfdir = sp.GetUserConfigDir()
userconfdir += "/"
if sys.platform.startswith("lin"):
userconfdir += "."
userconfdir += "scyther"
#print userconfdir
preflocs = [confdir,userconfdir]
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prefs = Preferences()
prefs.load("")
def get(key,alt=None):
global prefs
if prefs.has_key(key):
return prefs[key]
else:
return alt
def set(key,value):
global prefs
prefs[key]=value
return
def save():
global prefs
prefs.save()
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#---------------------------------------------------------------------------
# vim: set ts=4 sw=4 et list lcs=tab\:>-: