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# -*- coding: utf-8 -*-
"""OSD Neo2
========
On screen display for learning the keyboard layout Neo2
Copyright (c) 2009 Martin Zuther (http://www.mzuther.de/)
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 3 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, see <http://www.gnu.org/licenses/>.
Thank you for using free software!
"""
# Here follows a plea in German to keep the comments in English so
# that you may understand them, dear visitor ...
#
# Meine Kommentare in den Quellcodes sind absichtlich auf Englisch
# gehalten, damit Leute, die im Internet nach Lösungen suchen, den
# Code nachvollziehen können. Daher bitte ich darum, zusätzliche
# Kommentare ebenfalls auf Englisch zu schreiben. Vielen Dank!
import ConfigParser
import gettext
import locale
import os
import types
# initialise localisation settings
module_path = os.path.dirname(os.path.realpath(__file__))
gettext.bindtextdomain('OSDneo2', os.path.join(module_path, 'po/'))
gettext.textdomain('OSDneo2')
_ = gettext.lgettext
class Settings:
"""Store user and application settings in one place and make them available.
"""
def __init__(self):
"""Initialise user settings and application information.
Keyword arguments:
None
Return value:
None
"""
# common application copyrights and information (only set here, private)
self.__application__ = 'OSD Neo2'
self.__cmd_line__ = 'OSDneo2'
self.__version__ = '0.12'
self.__years__ = '2009'
self.__authors__ = 'Martin Zuther'
self.__license_short__ = 'GPL version 3 (or later)'
self.__license_long__ = """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 3 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, see <http://www.gnu.org/licenses/>.
Thank you for using free software!"""
self.__description__ = _('On screen display for learning the keyboard layout Neo2')
# set INI file path
self.__config_file_path__ = os.path.expanduser('~/.OSDneo2')
# if not found otherwise, INI file can be accessed
self.__can_access_config_file__ = True
# if INI file doesn't exist or cannot be read, ...
if not os.access(self.__config_file_path__, os.F_OK | os.R_OK):
print _('File "%s" not found.\nUsing default settings') % \
self.__config_file_path__
# ... try to create it
try:
configfile = open(self.__config_file_path__, 'w')
configfile.close()
# failed to create INI file
except IOError, e:
self.__can_access_config_file__ = False
print _('No read access to file "%s".\nChanged settings cannot be stored.') % \
self.__config_file_path__
# if INI file cannot be accessed, read or written to, ...
if self.__can_access_config_file__ and not os.access( \
self.__config_file_path__, os.F_OK | os.R_OK | os.W_OK):
# ... then notify the user
self.__can_access_config_file__ = False
print _('No write access to file "%s".\nChanged settings cannot be stored.') % \
self.__config_file_path__
# read application settings from INI file
self.__settings__ = ConfigParser.RawConfigParser()
self.__settings__.read(self.__config_file_path__)
def __repr__(self):
"""Return all the contents of the INI file as string.
Keyword arguments:
None
Return value:
Formatted string containing all settings from the INI file
"""
output = ''
# sort and output sections
for section in self.sections():
output += '\n[%s]\n' % section
# sort and output settings
for item in self.items(section):
output += '%s: %s\n' % (item[0], item[1])
# dump the whole thing
return output.lstrip('\n')
def get(self, section, setting, default):
"""Get an application setting.
Keyword arguments:
section -- string that specifies the section to be queried
setting -- string that specifies the setting to be queried
value -- string that specifies a default value
Return value:
String containing the specified application setting
"""
# return default value if INI file can't be accessed
if not self.__can_access_config_file__:
return default
try:
value = self.__settings__.get(section, setting)
except (ConfigParser.NoOptionError, ConfigParser.NoSectionError):
value = default
if type(default) != types.NoneType:
self.set(section, setting, default)
return value
def set(self, section, setting, value):
"""Set an application setting.
Keyword arguments:
section -- string that specifies the section to be changed
setting -- string that specifies the setting to be changed
value -- string that specifies the new value
Return value:
None
"""
# do nothing if INI file can't be accessed
if not self.__can_access_config_file__:
return
assert (type(value) == types.StringType) or \
(type(value) == types.UnicodeType)
if section not in self.sections():
self.__settings__.add_section(section)
old_value = self.get(section, setting, None)
if value != old_value:
self.__settings__.set(section, setting, value)
configfile = open(self.__config_file_path__, 'w')
configfile.write(self.__repr__())
configfile.close()
def items(self, section):
"""Get all application setting names of a section
Keyword arguments:
section -- string that specifies the section to be queried
Return value:
List containing application setting names of the given section
"""
items = self.__settings__.items(section)
items.sort()
return items
def sections(self):
"""Get all sections.
Keyword arguments:
None
Return value:
List containing all section names
"""
sections = self.__settings__.sections()
sections.sort()
return sections
def get_variable(self, variable):
"""Return application describing variable as string.
Keyword arguments:
variable -- variable to query
Return value:
Formatted string containing variable's value (or None for
invalid queries)
"""
# list of variable names that may be queried (as a security measure)
valid_variable_names = ('application', 'cmd_line', 'version', \
'years', 'authors', 'license_short', \
'license_long', 'description')
if variable in valid_variable_names:
return eval('self.__%s__' % variable)
else:
return None
def get_description(self, long):
"""Return application description as string.
Keyword arguments:
long -- Boolean indication whether to output long version of description
Return value:
Formatted string containing application description
"""
if long:
description = '%(application)s v%(version)s' % \
{'application':self.get_variable('application'), \
'version':self.get_variable('version')}
description += '\n' + '=' * len(description) + '\n'
description += '%(description)s' % \
{'description':self.get_variable('description')}
else:
description = '%(application)s %(version)s' % \
{'application':self.get_variable('application'), \
'version':self.get_variable('version')}
return description
def get_copyrights(self):
"""Return application copyrights as string.
Keyword arguments:
None
Return value:
Formatted string containing application copyrights
"""
return '(c) %(years)s %(authors)s' % \
{'years':self.get_variable('years'),\
'authors':self.get_variable('authors')}
def get_license(self, long):
"""Return application license as string.
Keyword arguments:
long -- Boolean indication whether to output long version of description
Return value:
Formatted string containing application license
"""
if long:
return self.get_variable('license_long')
else:
return self.get_variable('license_short')
# make everything available ("from Settings import *")
settings = Settings()
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