2 key-item.cc -- implement Key_item
4 source file of the GNU LilyPond music typesetter
6 (c) 1996, 1997--1999 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);
30 Key_item::get_c_position () const
32 // Find the c in the range -4 through 2
33 int from_bottom_pos = c0_position_ + 4;
34 from_bottom_pos = from_bottom_pos%7;
35 from_bottom_pos = (from_bottom_pos + 7)%7; // Precaution to get positive.
36 return from_bottom_pos - 4;
41 Key_item::set_c_position (int c0)
48 Key_item::add (int p, int a)
55 Key_item::add_old (int p, int a)
57 old_pitch_arr_.push (p);
58 old_acc_arr_.push (a);
63 Key_item::calculate_position(int p, int a) const
65 if (to_boolean (get_elt_property ("multi-octave")))
67 return p + c0_position_;
70 if ((a<0 && ((p>FLAT_TOP_PITCH) || (p+get_c_position ()>4)) && (p+get_c_position ()>1))
72 (a>0 && ((p>SHARP_TOP_PITCH) || (p+get_c_position ()>5)) && (p+get_c_position ()>2)))
74 p -= 7; /* Typeset below c_position */
76 /* Provide for the four cases in which there's a glitch */
77 /* it's a hack, but probably not worth */
78 /* the effort of finding a nicer solution. dl. */
79 if (get_c_position ()==2 && a>0 && p==3)
81 if (get_c_position ()==-3 && a>0 && p==-1)
83 if (get_c_position ()==-4 && a<0 && p==-1)
85 if (get_c_position ()==-2 && a<0 && p==-3)
87 return p + get_c_position ();
93 - space the `natural' signs wider
97 Key_item::do_brew_molecule_p() const
99 Molecule*output = new Molecule;
101 Staff_symbol_referencer_interface si (this);
102 Real inter = si.staff_space ()/2.0;
105 if ((break_status_dir () == LEFT || break_status_dir () == CENTER)
106 || old_pitch_arr_.size ())
108 for (int i =0; i < old_pitch_arr_.size(); i++)
110 for (j =0; (j < pitch_arr_.size())
111 && (old_pitch_arr_[i] != pitch_arr_[j]); j++)
114 if (j == pitch_arr_.size()
115 || (old_pitch_arr_[i] == pitch_arr_[j]
116 && old_acc_arr_[i] != acc_arr_[j]))
118 Molecule m =lookup_l ()->afm_find ("accidentals-0");
120 m.translate_axis (calculate_position(old_pitch_arr_[i], old_acc_arr_[i]) * inter, Y_AXIS);
121 output->add_at_edge (X_AXIS, RIGHT, m,0);
126 Add half a space between cancellation and key sig.
128 As suggested by [Ross], p.148.
130 Interval x(0, inter);
133 output->add_at_edge (X_AXIS, RIGHT, lookup_l()->fill (Box(x,y)),0);
136 for (int i =0; i < pitch_arr_.size(); i++)
138 Molecule m = lookup_l ()->afm_find ("accidentals-" + to_str (acc_arr_[i]));
139 m.translate_axis (calculate_position(pitch_arr_[i], acc_arr_[i]) * inter, Y_AXIS);
140 output->add_at_edge (X_AXIS, RIGHT, m, 0);