2 clef-engraver.cc -- implement Clef_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>,
8 Mats Bengtsson <matsb@s3.kth.se>
13 #include "translator-group.hh"
14 #include "key-item.hh"
15 #include "local-key-item.hh"
17 #include "note-head.hh"
18 #include "staff-symbol-referencer.hh"
20 #include "engraver.hh"
21 #include "direction.hh"
22 #include "side-position-interface.hh"
26 /// where is c-0 in the staff?
27 class Clef_engraver : public Engraver
30 VIRTUAL_COPY_CONS (Translator);
33 Direction octave_dir_;
36 virtual void do_process_music ();
37 virtual void do_pre_move_processing ();
38 virtual void do_creation_processing ();
39 virtual void do_post_move_processing ();
40 virtual void acknowledge_element (Score_element_info);
50 void set_central_c (SCM, SCM, SCM);
54 Clef_engraver::Clef_engraver ()
61 will trigger a clef at the start since #f != '()
63 prev_cpos_ = prev_glyph_ = SCM_BOOL_F;
67 Clef_engraver::set_central_c (SCM glyph,SCM clefpos, SCM octavation)
71 prev_octavation_ = octavation;
73 SCM p = get_property ("clefPitches");
77 SCM found = scm_assoc (glyph, p);
78 if (found == SCM_BOOL_F)
84 c0_position = gh_scm2int (gh_cdr (found));
86 if (gh_number_p (octavation))
87 c0_position -= gh_scm2int (octavation);
89 if (gh_number_p (clefpos))
90 c0_position += gh_scm2int (clefpos);
94 daddy_trans_l_->set_property ("centralCPosition", gh_int2scm (c0_position));
98 Clef_engraver::set_glyph ()
100 SCM glyph_sym = ly_symbol2scm ("glyph");
101 SCM glyph = get_property ("clefGlyph");
103 SCM basic = ly_symbol2scm ("Clef");
105 daddy_trans_l_->execute_single_pushpop_property (basic, glyph_sym, SCM_UNDEFINED);
106 daddy_trans_l_->execute_single_pushpop_property (basic, glyph_sym, glyph);
110 Generate a clef at the start of a measure. (when you see a Bar,
114 Clef_engraver::acknowledge_element (Score_element_info info)
116 Item * item =dynamic_cast <Item *> (info.elem_l_);
119 if (Bar::has_interface (info.elem_l_)
120 && gh_string_p (get_property ("clefGlyph")))
124 if (Note_head::has_interface (item)
125 || Local_key_item::has_interface (item)
126 || Custos::has_interface (item)
129 int p = int (Staff_symbol_referencer::position_f (item))
130 + gh_scm2int (get_property ("centralCPosition"));
131 Staff_symbol_referencer::set_position (item, p);
133 else if (Key_item::has_interface (item))
136 Key_item adapts its formatting to make sure that the
137 accidentals stay in the upper half of the staff. It needs
138 to know c0-pos for this. (?)
141 item->set_elt_property ("c0-position", get_property ("centralCPosition"));
147 Clef_engraver::do_creation_processing ()
154 Clef_engraver::create_clef ()
158 Item *c= new Item (get_property ("Clef"));
159 announce_element (c, 0);
161 Staff_symbol_referencer::set_interface (c);
165 Staff_symbol_referencer::set_position (clef_p_,
166 gh_scm2int (get_property ("clefPosition")));
168 SCM oct = get_property("clefOctavation");
169 if (gh_number_p (oct) && gh_scm2int (oct))
171 Item * g = new Item (get_property ("OctavateEight"));
173 Side_position::add_support (g,clef_p_);
175 g->set_parent (clef_p_, Y_AXIS);
176 g->set_parent (clef_p_, X_AXIS);
178 g->set_elt_property ("direction", gh_int2scm (sign (gh_scm2int (oct))));
180 announce_element (octavate_p_, 0);
185 Clef_engraver::do_process_music ()
187 SCM glyph = get_property ("clefGlyph");
188 SCM clefpos = get_property ("clefPosition");
189 SCM octavation = get_property ("clefOctavation");
191 if (scm_equal_p (glyph, prev_glyph_) == SCM_BOOL_F
192 || scm_equal_p (clefpos, prev_cpos_) == SCM_BOOL_F
193 || scm_equal_p (octavation, prev_octavation_) == SCM_BOOL_F)
196 set_central_c (glyph, clefpos, octavation);
200 clef_p_->set_elt_property ("non-default", SCM_BOOL_T);
205 Clef_engraver::do_pre_move_processing ()
210 if (to_boolean (clef_p_->get_elt_property ("non-default")))
212 vis = get_property ("explicitClefVisibility");
217 clef_p_->set_elt_property ("visibility-lambda", vis);
219 octavate_p_->set_elt_property ("visibility-lambda", vis);
222 typeset_element (clef_p_);
226 typeset_element (octavate_p_);
233 Clef_engraver::do_post_move_processing ()
237 ADD_THIS_TRANSLATOR (Clef_engraver);