Viewing file:  hookmgr.py (1.56 KB) -rw-r--r--
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# Copyright (C) 2009-2012 Lars Wirzenius
#
# 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.
class HookManager(object):
'''Manage the set of hooks the application defines.'''
def __init__(self):
self.hooks = {}
def new(self, name, hook):
'''Add a new hook to the manager.
If a hook with that name already exists, nothing happens.
'''
if name not in self.hooks:
self.hooks[name] = hook
def add_callback(self, name, callback):
'''Add a callback to a named hook.'''
return self.hooks[name].add_callback(callback)
def remove_callback(self, name, callback_id):
'''Remove a specific callback from a named hook.'''
self.hooks[name].remove_callback(callback_id)
def call(self, name, *args, **kwargs):
'''Call callbacks for a named hook, using given arguments.'''
return self.hooks[name].call_callbacks(*args, **kwargs)
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