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/*
This file is part of LilyPond, the GNU music typesetter.
Copyright (C) 2005--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
LilyPond 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 3 of the License, or
(at your option) any later version.
LilyPond 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 LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "engraver.hh"
#include "grob.hh"
#include "stream-event.hh"
#include "translator.icc"
class Tweak_engraver : public Engraver
{
TRANSLATOR_DECLARATIONS (Tweak_engraver);
protected:
void acknowledge_grob (Grob_info);
};
Tweak_engraver::Tweak_engraver ()
{
}
void
Tweak_engraver::acknowledge_grob (Grob_info info)
{
Stream_event *ev = info.event_cause ();
bool direct = ev;
SCM grobname = SCM_UNDEFINED;
if (!direct)
ev = info.ultimate_event_cause ();
if (ev)
{
// Each tweak conses an address and a value.
// The address has one of the following forms:
// symbol -> direct tweak
// (grob . symbol) -> targeted tweak
// (#t . symbol-path) -> direct nested tweak
// (grob . symbol-path) -> targeted nested tweak
for (SCM s = ev->get_property ("tweaks");
scm_is_pair (s); s = scm_cdr (s))
{
if (scm_is_pair (scm_caar (s)))
{
if (scm_is_symbol (scm_caaar (s)))
{
if (SCM_UNBNDP (grobname))
grobname = scm_from_utf8_symbol
(info.grob ()->name ().c_str ());
if (scm_is_eq (scm_caaar (s), grobname))
{
if (scm_is_symbol (scm_cdaar (s)))
info.grob ()->set_property (scm_cdaar (s), scm_cdar (s));
else
set_nested_property (info.grob (), scm_cdaar (s),
scm_cdar (s));
}
}
else if (direct)
set_nested_property (info.grob (), scm_cdaar (s),
scm_cdar (s));
}
else if (direct)
info.grob ()->set_property (scm_caar (s), scm_cdar (s));
}
}
}
void
Tweak_engraver::boot ()
{
ADD_ACKNOWLEDGER (Tweak_engraver, grob);
}
ADD_TRANSLATOR (Tweak_engraver,
/* doc */
"Read the @code{tweaks} property from the originating event,"
" and set properties.",
/* create */
"",
/* read */
"",
/* write */
""
);
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