source file of the GNU LilyPond music typesetter
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "engraver.hh"
-#include "score-element.hh"
+#include "grob.hh"
+#include "translator-group.hh"
class Output_property_engraver : public Engraver
{
-public:
- VIRTUAL_COPY_CONS(Translator);
+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
- score-element.
-
- */
-
-
Link_array<Music> props_;
- virtual void do_pre_move_processing ();
- virtual void acknowledge_element (Score_element_info);
- virtual bool do_try_music (Music*);
+ virtual void stop_translation_timestep ();
+ virtual void acknowledge_grob (Grob_info);
+ virtual bool try_music (Music*);
};
bool
-Output_property_engraver::do_try_music (Music* m)
+Output_property_engraver::try_music (Music* m)
{
- if (m->get_mus_property ("type") == ly_symbol2scm ("output-property"))
+ if (m->is_mus_type ("layout-instruction"))
{
props_.push (m);
return true;
}
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 (int 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))
+
+
+
+ if (gh_procedure_p (pred))
+ {
+ /*
+ 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
{
- SCM sym = o->get_mus_property ("symbol");
- SCM val = o->get_mus_property ("value");
- inf.elem_l_->set_elt_property (sym, val);
+ 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());
}
}
}
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()
+{
+}
+
+ENTER_DESCRIPTION(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 */ "");