2 scheme-engraver.hh -- declare Scheme_engraver
4 source file of the GNU LilyPond music typesetter
6 Copyright (c) 2009--2015 Han-Wen Nienhuys <hanwen@lilypond.org>
8 LilyPond is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 LilyPond is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef SCHEME_ENGRAVER_HH
23 #define SCHEME_ENGRAVER_HH
25 #include "engraver.hh"
27 class Scheme_engraver : public Engraver
29 void init_from_scheme (SCM definition);
31 TRANSLATOR_FAMILY_DECLARATIONS (Scheme_engraver);
32 Scheme_engraver (SCM definition);
37 virtual void initialize ();
38 virtual void finalize ();
39 virtual void derived_mark () const;
40 virtual SCM get_listener_list () const;
41 virtual bool must_be_last () const;
44 virtual SCM get_acknowledger (SCM sym)
46 return generic_get_acknowledger (sym, interface_acknowledger_hash_);
48 virtual SCM get_end_acknowledger (SCM sym)
50 return generic_get_acknowledger (sym, interface_end_acknowledger_hash_);
53 void init_acknowledgers (SCM alist, SCM *hash);
54 // For now no description. In future, something derived from the
55 // definition might make sense.
56 SCM translator_description () const { return SCM_EOL; }
60 SCM initialize_function_;
61 SCM finalize_function_;
62 SCM precomputable_methods_ [TRANSLATOR_METHOD_PRECOMPUTE_COUNT];
64 // hashq table of interface-symbol -> scheme-function
65 SCM interface_acknowledger_hash_;
66 SCM interface_end_acknowledger_hash_;
68 // Alist of listened-symbol . scheme-function
69 SCM per_instance_listeners_;
72 #endif /* SCHEME_ENGRAVER_HH */