2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
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 "engraver.hh"
23 #include "stream-event.hh"
25 #include "translator.icc"
28 class Output_property_engraver : public Engraver
30 TRANSLATOR_DECLARATIONS (Output_property_engraver);
32 vector<Stream_event*> props_;
34 void acknowledge_grob (Grob_info);
35 void listen_apply_output (Stream_event *);
37 void stop_translation_timestep ();
41 Output_property_engraver::listen_apply_output (Stream_event *ev)
44 UGH. Only swallow the output property event in the context
45 it was intended for. This is inelegant but not inefficient.
47 if (context ()->is_alias (ev->get_property ("context-type")))
48 props_.push_back (ev);
52 Output_property_engraver::acknowledge_grob (Grob_info inf)
54 for (vsize i = props_.size (); i--;)
56 Stream_event *o = props_[i];
57 Context *d = inf.context ();
58 SCM grob = o->get_property ("symbol");
59 if (scm_is_symbol (grob)
60 && ly_symbol2string (grob) != inf.grob ()->name ())
62 SCM proc = o->get_property ("procedure");
64 inf.grob ()->self_scm (),
66 context ()->self_scm ());
71 Output_property_engraver::stop_translation_timestep ()
76 Output_property_engraver::Output_property_engraver ()
81 Output_property_engraver::boot ()
83 ADD_LISTENER (Output_property_engraver, apply_output);
84 ADD_ACKNOWLEDGER (Output_property_engraver, grob);
87 ADD_TRANSLATOR (Output_property_engraver,
89 "Apply a procedure to any grob acknowledged.",