2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005 Erik Sandberg <mandolaerik@gmail.com>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 #include "listener.hh"
29 Listener::Listener (const void *target, Listener_function_table *type)
31 target_ = (void *)target;
35 Listener::Listener (Listener const &other)
37 target_ = other.target_;
41 void Listener::listen (SCM ev) const
43 (type_->listen_callback) (target_, ev);
47 Listener::mark_smob ()
50 (type_->mark_callback) (target_);
55 Listener::equal_p (SCM a, SCM b)
57 Listener *l1 = Listener::unsmob (a);
58 Listener *l2 = Listener::unsmob (b);
60 return (*l1 == *l2) ? SCM_BOOL_T : SCM_BOOL_F;
63 const char Listener::type_p_name_[] = "ly:listener?";