2 custos-engraver.cc -- implement Custos_engraver
4 source file of the GNU LilyPond music typesetter
6 (C) 2000 Juergen Reuter <reuterj@ira.uka.de>,
8 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "engraver.hh"
15 #include "note-head.hh"
16 #include "staff-symbol-referencer.hh"
18 #include "musical-request.hh"
21 This class implements an engraver for custos symbols.
23 class Custos_engraver : public Engraver
27 virtual void do_post_move_processing();
28 virtual void acknowledge_element(Score_element_info);
29 virtual void do_process_music ();
30 virtual void process_acknowledged ();
31 virtual void do_pre_move_processing ();
32 virtual void do_removal_processing ();
33 VIRTUAL_COPY_CONS(Translator);
36 Item * create_custos();
37 bool custos_permitted;
38 Link_array<Score_element> custos_arr_;
39 Array<Pitch> pitches_;
42 Custos_engraver::Custos_engraver ()
44 custos_permitted = false;
49 Custos_engraver::do_pre_move_processing()
52 delay typeset until we're at the next moment, so we can silence custodes at the end of the piece.
57 Custos_engraver::do_post_move_processing ()
59 for (int i = custos_arr_.size (); i--;)
61 typeset_element (custos_arr_[i]);
66 custos_permitted = false;
71 TODO check if this works with forced bar lines?
74 Custos_engraver::do_process_music ()
76 if (gh_string_p (get_property( "whichBar")))
77 custos_permitted = true;
81 Custos_engraver::acknowledge_element (Score_element_info info)
83 Item *item = dynamic_cast <Item *>(info.elem_l_);
86 if (Bar::has_interface (info.elem_l_))
87 custos_permitted = true;
88 else if (Note_head::has_interface (info.elem_l_))
92 ideally, we'd do custos->set_parent (Y_AXIS, notehead),
93 but since the note head lives on the other system, we can't
95 So we copy the position from the note head pitch. We
96 don't look at the staff-position, since we can't be sure
97 whether Clef_engraver already applied a vertical shift.
99 Note_req * nr = dynamic_cast<Note_req*> (info.req_l_);
101 pitches_.push (*unsmob_pitch (nr->get_mus_property ("pitch")));
107 Custos_engraver::process_acknowledged ()
109 if (custos_permitted)
111 for (int i = pitches_.size (); i--;)
113 Item *c = create_custos ();
115 c->set_elt_property ("staff-position",
116 gh_int2scm (pitches_[i].steps ()));
125 Custos_engraver::create_custos()
127 SCM basicProperties = get_property ("Custos");
128 Item* custos = new Item (basicProperties);
130 announce_element (custos, 0);
131 custos_arr_.push (custos);
137 Custos_engraver::do_removal_processing ()
139 for (int i = custos_arr_.size (); i--;)
141 custos_arr_[i]->suicide ();
142 typeset_element (custos_arr_[i]);
144 custos_arr_.clear ();
147 ADD_THIS_TRANSLATOR (Custos_engraver);