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# Copyright (C) 2009, Tutorius.org
# Copyright (C) 2009, Simon Poirier <simpoir@gmail.com>
#
#
# 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 St, Fifth Floor, Boston, MA 02110-1301 USA
"""
This module manages the loading and listing of tutorius addons.
Addons are modular actions and events that are package in such a way that they
can be autodetected and can integrate with Tutorius components (the editor)
without any configuration or explicit dependencies (python import).
An action addon is expected to have a metadata dict such as this one:
__action__ = {
"name" : "HelloWorld",
"display_name" : "Hello World!",
"icon" : "hello",
"class" : HelloAction,
"mandatory_props" : ["text"],
}
"""
import os
import re
import logging
PREFIX = __name__+"s"
PATH = re.sub("addon\\.py[c]$", "", __file__)+"addons"
_cache = None
def _reload_addons():
global _cache
_cache = {}
for addon in filter(lambda x: x.endswith("py"), os.listdir(PATH)):
mod = __import__(PREFIX+'.'+re.sub("\\.py$", "", addon), {}, {}, [""])
if hasattr(mod, "__action__"):
_cache[mod.__action__['name']] = mod.__action__
continue
if hasattr(mod, "__event__"):
_cache[mod.__event__['name']] = mod.__event__
def create(name, *args, **kwargs):
global _cache
if not _cache:
_reload_addons()
try:
comp_metadata = _cache[name]
try:
return comp_metadata['class'](*args, **kwargs)
except:
logging.error("Could not instantiate %s with parameters %s, %s"%(comp_metadata['name'],str(args), str(kwargs)))
return None
except KeyError:
logging.error("Addon not found for class '%s'", name)
return None
def list_addons():
global _cache
if not _cache:
_reload_addons()
return _cache.keys()
def get_addon_meta(name):
global _cache
if not _cache:
_reload_addons()
return _cache[name]
# vim:set ts=4 sts=4 sw=4 et:
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