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 "staff-symbol-referencer.hh"
17 #include "command-request.hh"
18 #include "timing-translator.hh"
19 #include "rhythmic-head.hh"
20 #include "key-item.hh"
21 #include "local-key-item.hh"
23 #include "engraver.hh"
24 #include "direction.hh"
25 #include "side-position-interface.hh"
28 /// where is c-0 in the staff?
29 class Clef_engraver
: public Engraver
{
32 Clef_change_req
* clef_req_l_
;
35 bool set_type (String
);
37 virtual void do_process_music();
38 virtual void do_pre_move_processing();
39 virtual void do_creation_processing();
40 virtual void do_post_move_processing();
41 virtual bool do_try_music (Music
*);
42 virtual void acknowledge_element (Score_element_info
);
44 VIRTUAL_COPY_CONS(Translator
);
48 Direction octave_dir_
;
49 SCM clef_glyph_
; // no need for protection. Always referenced somewhere else.
55 Protected_scm current_settings_
;
59 Clef_engraver::Clef_engraver()
61 current_settings_
= SCM_EOL
;
64 clef_glyph_
= SCM_EOL
;
74 Clef_engraver::set_type (String s
)
76 if (s
.right_str(2) == "_8") // Down one octave
79 s
= s
.left_str(s
.length_i() - 2);
81 else if (s
.right_str(2) == "^8") // Up one octave
84 s
= s
.left_str(s
.length_i() - 2);
89 SCM c
= get_property ("supportedClefTypes");
90 SCM p
= get_property ("clefPitches");
94 SCM found
= scm_assoc (ly_str02scm (s
.ch_C()), c
);
95 if (found
== SCM_BOOL_F
)
98 clef_glyph_
= gh_cadr (found
);
99 SCM pos
= gh_caddr (found
);
101 clef_position_i_
= gh_scm2int (pos
);
103 found
= scm_assoc (clef_glyph_
, p
);
104 if (found
== SCM_BOOL_F
)
107 c0_position_i_
= clef_position_i_
+ gh_scm2int (gh_cdr (found
));
110 c0_position_i_
-= (int) octave_dir_
* 7;
112 SCM basic
= get_property ("basicClefItemProperties");
113 current_settings_
= gh_cons (gh_cons (ly_symbol2scm ("glyph"), clef_glyph_
), basic
);
115 gh_cons (gh_cons (ly_symbol2scm ("c0-position"),
116 gh_int2scm (c0_position_i_
)),
123 Generate a clef at the start of a measure. (when you see a Bar,
127 Clef_engraver::acknowledge_element (Score_element_info info
)
129 if (dynamic_cast<Bar
*>(info
.elem_l_
)
130 && gh_string_p (clef_glyph_
))
133 Item
* it_l
=dynamic_cast <Item
*> (info
.elem_l_
);
136 if (to_boolean (it_l
->get_elt_property("note-head-interface"))
137 || dynamic_cast<Local_key_item
*> (it_l
))
139 Staff_symbol_referencer_interface
si (it_l
);
140 si
.set_position (int (si
.position_f ()) + c0_position_i_
);
142 else if (Key_item
*k
= dynamic_cast<Key_item
*>(it_l
))
144 k
->set_elt_property ("c0-position", gh_int2scm (c0_position_i_
));
150 Clef_engraver::do_creation_processing()
152 SCM def
= get_property ("defaultClef");
153 if (gh_string_p (def
))
155 set_type (ly_scm2string (def
));
160 Clef_engraver::do_try_music (Music
* r_l
)
162 if (Clef_change_req
*cl
= dynamic_cast <Clef_change_req
*> (r_l
))
165 if (!set_type (cl
->clef_str_
))
166 cl
->error (_ ("unknown clef type"));
176 Clef_engraver::create_clef()
180 Item
*c
= new Item ( current_settings_
);
181 announce_element (Score_element_info (c
, clef_req_l_
));
183 Staff_symbol_referencer_interface
si(c
);
188 Staff_symbol_referencer_interface
si(clef_p_
);
190 si
.set_position (clef_position_i_
);
193 Item
* g
= new Item (get_property ("basicOctavateEightProperties"));
194 Side_position_interface
spi (g
);
195 spi
.set_axis (Y_AXIS
);
196 spi
.add_support (clef_p_
);
197 g
->set_parent (clef_p_
, Y_AXIS
);
198 g
->set_parent (clef_p_
, X_AXIS
);
199 g
->add_offset_callback (Side_position_interface::aligned_on_self
, X_AXIS
);
200 g
->add_offset_callback (Side_position_interface::centered_on_parent
, X_AXIS
);
201 g
->set_elt_property ("direction", gh_int2scm (octave_dir_
));
203 announce_element (Score_element_info (octavate_p_
, clef_req_l_
));
209 Clef_engraver::do_process_music()
211 if (clef_req_l_
|| first_b_
)
214 clef_p_
->set_elt_property ("non-default", SCM_BOOL_T
);
219 Clef_engraver::do_pre_move_processing()
224 if(to_boolean (clef_p_
->get_elt_property("non-default")))
226 vis
= ly_symbol2scm ("all-visible");
227 vis
= scm_eval (vis
);
232 clef_p_
->set_elt_property("visibility-lambda", vis
);
234 octavate_p_
->set_elt_property("visibility-lambda", vis
);
237 typeset_element (clef_p_
);
241 typeset_element(octavate_p_
);
250 Clef_engraver::do_post_move_processing()
255 ADD_THIS_TRANSLATOR(Clef_engraver
);