1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
# 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)
|
