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#
# Kiwi: a Framework and Enhanced Widgets for Python
#
# Copyright (C) 2003-2005 Async Open Source
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
#
# Author(s): Christian Reis <kiko@async.com.br>
# Lorenzo Gil Sanchez <lgs@sicem.biz>
# Johan Dahlin <jdahlin@async.com.br>
#
import gettext
import os
import sys
__all__ = ['Application', 'Library', 'app', 'environ', 'require_gazpacho',
'is_gazpacho_required']
# copied from twisted/python/reflect.py
def namedAny(name):
"""Get a fully named package, module, module-global object, or attribute.
"""
names = name.split('.')
topLevelPackage = None
moduleNames = names[:]
while not topLevelPackage:
try:
trialname = '.'.join(moduleNames)
topLevelPackage = __import__(trialname)
except ImportError:
# if the ImportError happened in the module being imported,
# this is a failure that should be handed to our caller.
# count stack frames to tell the difference.
import traceback
exc_info = sys.exc_info()
if len(traceback.extract_tb(exc_info[2])) > 1:
try:
# Clean up garbage left in sys.modules.
del sys.modules[trialname]
except KeyError:
# Python 2.4 has fixed this. Yay!
pass
raise exc_info[0], exc_info[1], exc_info[2]
moduleNames.pop()
obj = topLevelPackage
for n in names[1:]:
obj = getattr(obj, n)
return obj
class Environment:
"""Environment control
When you want to access a resource on the filesystem, such as
an image or a glade file you use this object.
External libraries or applications are free to add extra directories"""
def __init__(self, root='.'):
self._resources = {}
self._root = root
self._add_resource_variable("glade", "KIWI_GLADE_PATH")
self._add_resource_variable("image", "KIWI_IMAGE_PATH")
def get_root(self):
return self._root
def _add_resource_variable(self, resource, variable):
"""Add resources from an environment variable"""
env = os.environ.get(variable, '')
for path in env.split(':'):
if not path:
continue
self.add_resource(resource, env)
def get_resource_paths(self, resource):
if not resource in self._resources:
raise EnvironmentError("No resource called: %s" % resource)
return self._resources[resource]
def add_resource(self, resource, path):
path = os.path.join(self._root, path)
if not os.path.isdir(path):
raise EnvironmentError("path %s must be a directory" % path)
resources = self._resources
if not resource in resources:
resources[resource] = [path]
else:
resources[resource].append(path)
def add_resources(self, **kwargs):
for resource, path in kwargs.items():
self.add_resource(resource, path)
def find_resource(self, resource, name):
"""Locate a specific resource of called name of type resource"""
resource_paths = self.get_resource_paths(resource)
for path in resource_paths:
filename = os.path.join(self._root, path, name)
if os.path.exists(filename):
return filename
# Finally try to load the file from the current directory
filename = os.path.join(self._root, name)
if os.path.exists(filename):
return filename
raise EnvironmentError("Could not find %s resource: %s" % (
resource, name))
class Library(Environment):
"""A Library is a local environment object, it's a subclass of the
Environment class.
It's used by libraries and applications (through the Application class)
It provides a way to manage local resources, which should only be seen
in the current context.
"""
def __init__(self, name, root='..', dirname=None):
self.name = name
if dirname == None:
# Figure out the absolute path to the caller
caller = sys._getframe(1).f_locals['__file__']
dirname = os.path.split(caller)[0]
dirname = os.path.realpath(os.path.abspath(dirname))
root = os.path.abspath(os.path.join(dirname, root))
Environment.__init__(self, root=root)
sys.path.insert(0, os.path.join(root, 'lib', 'python%d.%d' %
sys.version_info[:2], 'site-packages'))
g = globals()
l = locals()
try:
module = __import__(name, g, l, name)
except ImportError:
raise ImportError("Failed to import module %s" % name)
# Load installed
try:
module = __import__(name + '.__installed__',
g, l, name)
except ImportError, e:
uninstalled = True
else:
uninstalled = False
if not hasattr(module, 'resources'):
raise ValueError("module %s.__installed__ must define a "
"resources attribute" % name)
if not hasattr(module, 'global_resources'):
raise ValueError("module %s.__installed__ must define a "
"global_resources attribute" % name)
self.add_resources(**module.resources)
self.add_global_resources(**module.global_resources)
self.uninstalled = uninstalled
def enable_translation(self, domain=None, locale='locale',
charset='utf-8'):
if not domain:
domain = self.name
# XXX: locale should not be a list
localedir = self._resources.get(locale)
if localedir:
gettext.bindtextdomain(domain, localedir[0])
gettext.bind_textdomain_codeset(domain, charset)
def add_global_resource(self, resource, path):
"""Convenience method to add a global resource.
This is the same as calling kiwi.environ.environ.add_resource
"""
global environ
environ.add_resource(resource, os.path.join(self._root, path))
def add_global_resources(self, **kwargs):
for resource, path in kwargs.items():
self.add_global_resource(resource, path)
class Application(Library):
"""An Application extends a library. The additions are:
- a run() method, used to run the application
- path, a reference to the callable object to run, defaults to 'main'
"""
def __init__(self, name, root='..', path='main'):
global app
app = self
dirname = os.path.abspath(os.path.dirname(sys.argv[0]))
Library.__init__(self, name, root, dirname)
self._path = path
def _get_main(self):
try:
module = namedAny(self._path)
except (ValueError, AttributeError, ImportError), e:
raise SystemExit("ERROR: Could not find item '%s', %s" %
(self._path, e))
main = getattr(module, 'main', None)
if not main or not callable(main):
raise SystemExit("ERROR: Could not find item '%s' in module %s" %
'main', self._path)
return main
def enable_translation(self, domain=None, locale='locale',
charset='utf-8'):
if not domain:
domain = self.name
Library.enable_translation(self, domain, locale, charset)
gettext.textdomain(domain)
def run(self):
main = self._get_main()
try:
sys.exit(main(sys.argv))
except KeyboardInterrupt:
raise SystemExit
_require_gazpacho_loader = False
def require_gazpacho():
global _require_gazpacho_loader
_require_gazpacho_loader = True
def is_gazpacho_required():
global _require_gazpacho_loader
return _require_gazpacho_loader
# Global variables
environ = Environment()
app = None
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