2 clef.cc -- implement Clef_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>,
8 Mats Bengtsson <matsb@s3.kth.se>
16 #include "clef-engraver.hh"
17 #include "clef-item.hh"
19 #include "command-request.hh"
20 #include "timing-translator.hh"
21 #include "note-head.hh"
22 #include "key-item.hh"
23 #include "local-key-item.hh"
25 Clef_engraver::Clef_engraver()
33 create_default_b_ = true;
37 Clef_engraver::set_type (String s)
39 if (s.right_str(2) == "_8") // Down one octave
42 s = s.left_str(s.length_i() - 2);
44 else if (s.right_str(2) == "^8") // Up one octave
47 s = s.left_str(s.length_i() - 2);
53 SCM c = get_property ("supportedClefTypes",0);
54 for (; gh_pair_p(c); c = gh_cdr (c))
56 SCM entry = gh_car (c);
57 SCM name = gh_car (entry);
59 if (ly_scm2string (name) != s)
62 SCM glyph = gh_cadr (entry);
63 SCM pos = gh_caddr (entry);
65 clef_type_str_ = ly_scm2string (glyph);
66 clef_position_i_ = gh_scm2int (pos);
73 switch(toupper (s[0]))
76 clef_type_str_ = "bass";
79 clef_type_str_ = "treble";
82 clef_type_str_ = "alto";
87 clef_position_i_ = 2 * (s[1] - '0') - 6;
90 if (clef_type_str_ == "treble")
91 c0_position_i_ = clef_position_i_ - 4;
92 else if (clef_type_str_ == "alto")
93 c0_position_i_ = clef_position_i_;
94 else if (clef_type_str_ == "bass")
95 c0_position_i_ = clef_position_i_ + 4;
99 c0_position_i_ -= (int) octave_dir_ * 7;
106 Generate a clef at the start of a measure. (when you see a Bar,
110 Clef_engraver::acknowledge_element (Score_element_info info)
112 if (dynamic_cast<Bar*>(info.elem_l_)
113 && clef_type_str_.length_i())
115 bool default_clef = !clef_p_;
118 clef_p_->set_elt_property("visibility-lambda",
119 ly_eval_str ("all-visibility"));
122 /* ugh; should make Clef_referenced baseclass */
123 Item * it_l =dynamic_cast <Item *> (info.elem_l_);
126 if (Note_head * h = dynamic_cast<Note_head*>(it_l))
128 h->set_position (int (h->position_f ()) + c0_position_i_);
130 else if (Local_key_item *i = dynamic_cast<Local_key_item*> (it_l))
132 i->c0_position_i_ =c0_position_i_;
134 else if (Key_item *k = dynamic_cast<Key_item*>(it_l))
136 k-> set_c_position (c0_position_i_);
142 Clef_engraver::do_creation_processing()
144 create_default_b_ = true; // should read property.
145 SCM def = get_property ("createInitdefaultClef", 0);
146 if (gh_string_p (def))
147 set_type (ly_scm2string (def));
149 if (clef_type_str_.length_i ())
152 clef_p_->set_elt_property ("non-default", SCM_BOOL_T);
157 Clef_engraver::do_try_music (Music * r_l)
159 if (Clef_change_req *cl = dynamic_cast <Clef_change_req *> (r_l))
162 if (!set_type (cl->clef_str_))
163 cl->error (_ ("unknown clef type"));
173 Clef_engraver::create_clef()
177 Clef_item *c= new Clef_item;
178 c->set_elt_property ("break-aligned", SCM_BOOL_T);
179 announce_element (Score_element_info (c, clef_req_l_));
183 clef_p_->symbol_ = clef_type_str_;
184 clef_p_->set_position(clef_position_i_);
187 clef_p_->set_elt_property ("octave-dir", gh_int2scm (octave_dir_));
193 Clef_engraver::do_process_requests()
199 else if (create_default_b_)
201 SCM type = get_property ("defaultClef", 0);
202 if (gh_string_p (type))
203 set_type (ly_scm2string (type));
205 set_type ( "treble");
207 create_default_b_ = false;
212 Clef_engraver::do_pre_move_processing()
216 typeset_element (clef_p_);
219 create_default_b_ = false;
223 Clef_engraver::do_post_move_processing()
229 Clef_engraver::do_removal_processing()
236 ADD_THIS_TRANSLATOR(Clef_engraver);