-/*
- output-property-engraver.cc -- implement Output_property_engraver
-
- source file of the GNU LilyPond music typesetter
-
- (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2000--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 "context.hh"
+#include "grob.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
+
class Output_property_engraver : public Engraver
{
-TRANSLATOR_DECLARATIONS (Output_property_engraver);
+ TRANSLATOR_DECLARATIONS (Output_property_engraver);
protected:
- Link_array<Music> props_;
+ vector<Stream_event*> props_;
+
+ void acknowledge_grob (Grob_info);
+ void listen_apply_output (Stream_event *);
- PRECOMPUTED_VIRTUAL void stop_translation_timestep ();
- virtual void acknowledge_grob (Grob_info);
- virtual bool try_music (Music*);
+ void stop_translation_timestep ();
};
-
-bool
-Output_property_engraver::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->is_mus_type ("layout-instruction"))
- {
- props_.push (m);
- return true;
- }
- return false;
+ props_.push_back (ev);
}
void
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_property ("predicate");
-
-
-
- if (ly_is_procedure (pred))
- {
- /*
- should typecheck pred.
- */
- SCM result = scm_call_1 (pred, inf.grob ()->self_scm ());
- if (to_boolean (result))
- {
- SCM sym = o->get_property ("grob-property");
- SCM val = o->get_property ("grob-value");
- inf.grob ()->internal_set_property (sym, val);
- }
- }
- else
- {
- Context * d = inf.context ();
- SCM proc = o->get_property ("procedure");
- scm_call_3 (proc,
- inf.grob ()->self_scm (),
- d->self_scm (),
- context ()->self_scm ());
- }
+ 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 ());
+ }
}
}
props_.clear ();
}
-Output_property_engraver::Output_property_engraver ()
+Output_property_engraver::Output_property_engraver (Context *c)
+ : Engraver (c)
{
}
-#include "translator.icc"
+void
+Output_property_engraver::boot ()
+{
+ ADD_LISTENER (Output_property_engraver, apply_output);
+ ADD_ACKNOWLEDGER (Output_property_engraver, grob);
+}
ADD_TRANSLATOR (Output_property_engraver,
-/* descr */ "Interpret Music of Output_property type, and apply a function "
-" to any Graphic objects that satisfies the predicate.",
-/* creats*/ "",
-/* accepts */ "layout-instruction",
-/* acks */ "grob-interface",
-/* reads */ "",
-/* write */ "");
+ /* doc */
+ "Apply a procedure to any grob acknowledged.",
+
+ /* create */
+ "",
+
+ /* read */
+ "",
+
+ /* write */
+ ""
+ );