-/*
- output-property-engraver.cc -- implement Output_property_engraver
-
- source file of the GNU LilyPond music typesetter
-
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+/*
+ This file is part of LilyPond, the GNU music typesetter.
-#include "engraver.hh"
-#include "score-element.hh"
+ Copyright (C) 2000--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
-class Output_property_engraver : public Engraver
-{
-public:
- VIRTUAL_COPY_CONS(Translator);
-protected:
+ 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.
- /*
- should do this with \once and \push ?
+ 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 "context.hh"
+#include "grob.hh"
+#include "stream-event.hh"
- \property Voice.outputProperties \push #pred = #modifier
+#include "translator.icc"
- where both MODIFIER and PRED are functions taking a
- score-element.
-
- */
+class Output_property_engraver : public Engraver
+{
+ TRANSLATOR_DECLARATIONS (Output_property_engraver);
+protected:
+ vector<Stream_event*> props_;
- Link_array<Music> props_;
+ void acknowledge_grob (Grob_info);
+ void listen_apply_output (Stream_event *);
- virtual void do_pre_move_processing ();
- virtual void acknowledge_element (Score_element_info);
- virtual bool do_try_music (Music*);
+ void stop_translation_timestep ();
};
-
-bool
-Output_property_engraver::do_try_music (Music* m)
+// We only run this in the Score context, so all events are likely to
+// find a target
+void
+Output_property_engraver::listen_apply_output (Stream_event *ev)
{
- if (m->get_mus_property ("type") == ly_symbol2scm ("output-property"))
- {
- props_.push (m);
- return true;
- }
- return false;
+ props_.push_back (ev);
}
void
-Output_property_engraver::acknowledge_element (Score_element_info inf)
+Output_property_engraver::acknowledge_grob (Grob_info inf)
{
- for (int i=props_.size (); i--; )
+ for (vsize i = props_.size (); i--;)
{
- Music * o = props_[i];
- SCM pred = o->get_mus_property ("predicate");
-
- /*
- should typecheck pred.
- */
- SCM result=gh_apply (pred,
- gh_list (inf.elem_l_->self_scm (), SCM_UNDEFINED));
- if (to_boolean (result))
- {
- SCM sym = o->get_mus_property ("symbol");
- SCM val = o->get_mus_property ("value");
- inf.elem_l_->set_elt_property (sym, val);
- }
+ Stream_event *o = props_[i];
+ Context *d = inf.context ();
+ SCM grob = o->get_property ("symbol");
+ if (scm_is_symbol (grob)
+ && ly_symbol2string (grob) != inf.grob ()->name ())
+ continue;
+ SCM typ = o->get_property ("context-type");
+ SCM proc = o->get_property ("procedure");
+ for (Context *c = d; c; c = c->get_parent_context ())
+ {
+ if (c->is_alias (typ))
+ scm_call_3 (proc,
+ inf.grob ()->self_scm (),
+ d->self_scm (),
+ c->self_scm ());
+ }
}
}
void
-Output_property_engraver::do_pre_move_processing ()
+Output_property_engraver::stop_translation_timestep ()
{
props_.clear ();
}
-ADD_THIS_TRANSLATOR(Output_property_engraver);
+Output_property_engraver::Output_property_engraver (Context *c)
+ : Engraver (c)
+{
+}
+
+void
+Output_property_engraver::boot ()
+{
+ ADD_LISTENER (Output_property_engraver, apply_output);
+ ADD_ACKNOWLEDGER (Output_property_engraver, grob);
+}
+
+ADD_TRANSLATOR (Output_property_engraver,
+ /* doc */
+ "Apply a procedure to any grob acknowledged.",
+
+ /* create */
+ "",
+
+ /* read */
+ "",
+
+ /* write */
+ ""
+ );