2 output-property-engraver.cc -- implement Output_property_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "output-property.hh"
11 #include "engraver.hh"
12 #include "score-element.hh"
14 class Output_property_engraver : public Engraver
17 VIRTUAL_COPY_CONS(Translator);
20 Link_array<Output_property> props_;
22 virtual void do_pre_move_processing ();
23 virtual void acknowledge_element (Score_element_info);
24 virtual bool do_try_music (Music*);
29 Output_property_engraver::do_try_music (Music* m)
31 if (Output_property * o = dynamic_cast<Output_property*> (m))
40 Output_property_engraver::acknowledge_element (Score_element_info inf)
42 for (int i=props_.size (); i--; )
44 Output_property * o = props_[i];
45 SCM pred = o->get_mus_property ("predicate");
48 should typecheck pred.
50 SCM result=gh_apply (pred,
51 gh_list (inf.elem_l_->self_scm (), SCM_UNDEFINED));
52 if (to_boolean (result))
54 SCM sym = o->get_mus_property ("symbol");
55 SCM val = o->get_mus_property ("value");
56 inf.elem_l_->set_elt_property (sym, val);
62 Output_property_engraver::do_pre_move_processing ()
67 ADD_THIS_TRANSLATOR(Output_property_engraver);