source file of the GNU LilyPond music typesetter
- (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "engraver.hh"
#include "grob.hh"
-#include "output-property-music-iterator.hh"
+#include "translator-group.hh"
class Output_property_engraver : public Engraver
{
TRANSLATOR_DECLARATIONS(Output_property_engraver);
protected:
-
- /*
- should do this with \once and \push ?
-
-
- \property Voice.outputProperties \push #pred = #modifier
-
- where both MODIFIER and PRED are functions taking a
- grob.
-
- */
-
-
Link_array<Music> props_;
virtual void stop_translation_timestep ();
bool
Output_property_engraver::try_music (Music* m)
{
- if (m->get_mus_property ("iterator-ctor") ==
- Output_property_music_iterator::constructor_cxx_function)
+ if (m->is_mus_type ("layout-instruction"))
{
props_.push (m);
return true;
{
Music * o = props_[i];
SCM pred = o->get_mus_property ("predicate");
-
- /*
- should typecheck pred.
- */
- SCM result=gh_apply (pred,
- scm_list_n (inf.grob_->self_scm (), SCM_UNDEFINED));
- if (to_boolean (result))
+
+
+
+ if (gh_procedure_p (pred))
{
- SCM sym = o->get_mus_property ("grob-property");
- SCM val = o->get_mus_property ("grob-value");
- inf.grob_->internal_set_grob_property (sym, val);
+ /*
+ should typecheck pred.
+ */
+ SCM result=scm_call_1 (pred, inf.grob_->self_scm ());
+ if (to_boolean (result))
+ {
+ SCM sym = o->get_mus_property ("grob-property");
+ SCM val = o->get_mus_property ("grob-value");
+ inf.grob_->internal_set_grob_property (sym, val);
+ }
+ }
+ else
+ {
+ Translator_group * d =
+ dynamic_cast<Translator_group*> (inf.origin_trans_);
+
+ if (!d)
+ d = dynamic_cast<Translator_group*> (inf.origin_trans_->daddy_trans_);
+
+ SCM proc = o->get_mus_property ("procedure");
+ scm_call_3 (proc,
+ inf.grob_->self_scm(),
+ d->self_scm(),
+ daddy_trans_->self_scm());
}
}
}
}
ENTER_DESCRIPTION(Output_property_engraver,
-/* descr */ "Interpret Music of Output_property type, and apply a function
-to any Graphic objects that satisfies the predicate.",
+/* 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 */ "");