source file of the GNU LilyPond music typesetter
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "output-property.hh"
#include "engraver.hh"
-#include "score-element.hh"
+#include "grob.hh"
+#include "output-property-music-iterator.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
+ grob.
+
+ */
+
- Link_array<Output_property> props_;
+ 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 (Output_property * o = dynamic_cast<Output_property*> (m))
+ if (m->is_mus_type ("layout-instruction"))
{
- props_.push (o);
+ props_.push (m);
return true;
}
return false;
}
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--;)
{
- Output_property * o = props_[i];
- SCM pred = gh_car (o->pred_sym_val_list_);
+ 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));
+ scm_list_n (inf.grob_->self_scm (), SCM_UNDEFINED));
if (to_boolean (result))
{
- Score_element::ly_set_elt_property (inf.elem_l_->self_scm_,
- gh_cadr (o->pred_sym_val_list_),
- gh_caddr (o->pred_sym_val_list_));
+ SCM sym = o->get_mus_property ("grob-property");
+ SCM val = o->get_mus_property ("grob-value");
+ inf.grob_->internal_set_grob_property (sym, val);
}
}
}
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 */ "");