1 files changed, 46 insertions, 0 deletions
diff --git a/cliapp/hookmgr.py b/cliapp/hookmgr.py
new file mode 100644
index 00000000..80db2d0a
--- /dev/null
+++ b/cliapp/hookmgr.py
@@ -0,0 +1,46 @@
+# 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)
+