2 clef-engraver.cc -- implement Clef_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>,
8 Mats Bengtsson <matsb@s3.kth.se>
13 #include "translator-group.hh"
14 #include "key-item.hh"
16 #include "staff-symbol-referencer.hh"
18 #include "engraver.hh"
19 #include "direction.hh"
20 #include "side-position-interface.hh"
24 class Clef_engraver : public Engraver
27 VIRTUAL_COPY_CONS (Translator);
30 Direction octave_dir_;
33 virtual void stop_translation_timestep ();
34 virtual void start_translation_timestep ();
35 virtual void process_music ();
36 virtual void acknowledge_grob (Grob_info);
37 virtual void do_creation_processing ();
46 void set_central_c (SCM, SCM, SCM);
48 void inspect_clef_properties ();
51 Clef_engraver::Clef_engraver ()
58 will trigger a clef at the start since #f != ' ()
60 prev_cpos_ = prev_glyph_ = SCM_BOOL_F;
64 Clef_engraver::set_central_c (SCM glyph,SCM clefpos, SCM octavation)
68 prev_octavation_ = octavation;
70 SCM p = get_property ("clefPitches");
74 SCM found = scm_assoc (glyph, p);
75 if (found == SCM_BOOL_F)
81 c0_position = gh_scm2int (gh_cdr (found));
83 if (gh_number_p (octavation))
84 c0_position -= gh_scm2int (octavation);
86 if (gh_number_p (clefpos))
87 c0_position += gh_scm2int (clefpos);
91 daddy_trans_l_->set_property ("centralCPosition", gh_int2scm (c0_position));
95 Clef_engraver::set_glyph ()
97 SCM glyph_sym = ly_symbol2scm ("glyph-name");
98 SCM glyph = get_property ("clefGlyph");
100 SCM basic = ly_symbol2scm ("Clef");
102 daddy_trans_l_->execute_single_pushpop_property (basic, glyph_sym, SCM_UNDEFINED);
103 daddy_trans_l_->execute_single_pushpop_property (basic, glyph_sym, glyph);
107 Generate a clef at the start of a measure. (when you see a Bar,
111 Clef_engraver::acknowledge_grob (Grob_info info)
113 Item * item =dynamic_cast <Item *> (info.elem_l_);
116 if (Bar::has_interface (info.elem_l_)
117 && gh_string_p (get_property ("clefGlyph")))
120 if (Key_item::has_interface (item))
123 Key_item adapts its formatting to make sure that the
124 accidentals stay in the upper half of the staff. It needs
125 to know c0-pos for this. (?)
128 item->set_grob_property ("c0-position", get_property ("centralCPosition"));
134 Clef_engraver::create_clef ()
138 Item *c= new Item (get_property ("Clef"));
139 announce_grob (c, 0);
141 Staff_symbol_referencer::set_interface (c);
145 Staff_symbol_referencer::set_position (clef_p_,
146 gh_scm2int (get_property ("clefPosition")));
148 SCM oct = get_property ("clefOctavation");
149 if (gh_number_p (oct) && gh_scm2int (oct))
151 Item * g = new Item (get_property ("OctavateEight"));
153 Side_position_interface::add_support (g,clef_p_);
155 g->set_parent (clef_p_, Y_AXIS);
156 g->set_parent (clef_p_, X_AXIS);
158 g->set_grob_property ("direction", gh_int2scm (sign (gh_scm2int (oct))));
160 announce_grob (octavate_p_, 0);
165 Clef_engraver::process_music ()
167 inspect_clef_properties ();
171 this must be done in creation_proc() since grace notes will be
172 processed before Clef_engraver::prcoess_music()
174 Grace notes and clef changes are still broken.
177 Clef_engraver::do_creation_processing ()
179 inspect_clef_properties ();
183 Clef_engraver::inspect_clef_properties ()
185 SCM glyph = get_property ("clefGlyph");
186 SCM clefpos = get_property ("clefPosition");
187 SCM octavation = get_property ("clefOctavation");
188 SCM force_clef = get_property ("forceClef");
190 if (clefpos == SCM_EOL
191 || 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
194 || to_boolean (force_clef)
198 set_central_c (glyph, clefpos, octavation);
202 clef_p_->set_grob_property ("non-default", SCM_BOOL_T);
205 if (to_boolean (force_clef))
207 Translator_group * w = daddy_trans_l_->where_defined (ly_symbol2scm ("forceClef"));
208 w->set_property ("forceClef", SCM_EOL);
213 Clef_engraver::stop_translation_timestep ()
218 if (to_boolean (clef_p_->get_grob_property ("non-default")))
220 vis = get_property ("explicitClefVisibility");
225 clef_p_->set_grob_property ("visibility-lambda", vis);
227 octavate_p_->set_grob_property ("visibility-lambda", vis);
230 typeset_grob (clef_p_);
234 typeset_grob (octavate_p_);
241 Clef_engraver::start_translation_timestep ()
245 ADD_THIS_TRANSLATOR (Clef_engraver);