2 key-item.cc -- implement Key_item
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 keyplacement by Mats Bengtsson
11 #include "key-item.hh"
14 #include "molecule.hh"
15 #include "paper-def.hh"
17 #include "musical-pitch.hh"
18 #include "staff-symbol-referencer.hh"
20 const int FLAT_TOP_PITCH=2; /* fes,ges,as and bes typeset in lower octave */
21 const int SHARP_TOP_PITCH=4; /* ais and bis typeset in lower octave */
25 set_elt_property ("breakable", SCM_BOOL_T);
26 set_elt_property ("c0-position", gh_int2scm (0));
30 Key_item::add (int p, int a)
37 Key_item::add_old (int p, int a)
39 old_pitch_arr_.push (p);
40 old_acc_arr_.push (a);
45 Key_item::calculate_position(int p, int a) const
47 if (to_boolean (get_elt_property ("multi-octave")))
49 return p + gh_scm2int (get_elt_property ("c0-position"));
52 // Find the c in the range -4 through 2
53 int from_bottom_pos = gh_scm2int (get_elt_property ("c0-position")) + 4;
54 from_bottom_pos = from_bottom_pos%7;
55 from_bottom_pos = (from_bottom_pos + 7)%7; // Precaution to get positive.
56 int c0 = from_bottom_pos - 4;
59 if ((a<0 && ((p>FLAT_TOP_PITCH) || (p+c0>4)) && (p+c0>1))
61 (a>0 && ((p>SHARP_TOP_PITCH) || (p+c0>5)) && (p+c0>2)))
63 p -= 7; /* Typeset below c_position */
65 /* Provide for the four cases in which there's a glitch */
66 /* it's a hack, but probably not worth */
67 /* the effort of finding a nicer solution. dl. */
68 if (c0==2 && a>0 && p==3)
70 if (c0==-3 && a>0 && p==-1)
72 if (c0==-4 && a<0 && p==-1)
74 if (c0==-2 && a<0 && p==-3)
83 - space the `natural' signs wider
87 Key_item::do_brew_molecule() const
91 Staff_symbol_referencer_interface si (this);
92 Real inter = si.staff_space ()/2.0;
95 if ((break_status_dir () == LEFT || break_status_dir () == CENTER)
96 || old_pitch_arr_.size ())
98 for (int i =0; i < old_pitch_arr_.size(); i++)
100 for (j =0; (j < pitch_arr_.size())
101 && (old_pitch_arr_[i] != pitch_arr_[j]); j++)
104 if (j == pitch_arr_.size()
105 || (old_pitch_arr_[i] == pitch_arr_[j]
106 && old_acc_arr_[i] != acc_arr_[j]))
108 Molecule m =lookup_l ()->afm_find ("accidentals-0");
110 m.translate_axis (calculate_position(old_pitch_arr_[i], old_acc_arr_[i]) * inter, Y_AXIS);
111 mol.add_at_edge (X_AXIS, RIGHT, m,0);
116 Add half a space between cancellation and key sig.
118 As suggested by [Ross], p.148.
120 Interval x(0, inter);
123 mol.add_at_edge (X_AXIS, RIGHT, lookup_l()->blank (Box(x,y)),0);
126 for (int i =0; i < pitch_arr_.size(); i++)
128 Molecule m = lookup_l ()->afm_find ("accidentals-" + to_str (acc_arr_[i]));
129 m.translate_axis (calculate_position(pitch_arr_[i], acc_arr_[i]) * inter, Y_AXIS);
130 mol.add_at_edge (X_AXIS, RIGHT, m, 0);