2 note-column.cc -- implement Note_column
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "note-column.hh"
11 #include <cmath> // ceil
14 #include "accidental-placement.hh"
15 #include "axis-group-interface.hh"
16 #include "directional-element-interface.hh"
17 #include "international.hh"
19 #include "note-head.hh"
20 #include "output-def.hh"
21 #include "pointer-group-interface.hh"
23 #include "staff-symbol-referencer.hh"
28 TODO: figure out if we can prune this class. This is just an
29 annoying layer between (rest)collision & (note-head + stem)
33 Note_column::has_rests (Grob *me)
35 return unsmob_grob (me->get_object ("rest"));
39 Note_column::shift_less (Grob *const &p1, Grob *const &p2)
41 SCM s1 = p1->get_property ("horizontal-shift");
42 SCM s2 = p2->get_property ("horizontal-shift");
44 int h1 = (scm_is_number (s1)) ? scm_to_int (s1) : 0;
45 int h2 = (scm_is_number (s2)) ? scm_to_int (s2) : 0;
50 Note_column::get_stem (Grob *me)
52 SCM s = me->get_object ("stem");
53 return unsmob_item (s);
57 Note_column::head_positions_interval (Grob *me)
63 extract_grob_set (me, "note-heads", heads);
64 for (vsize i = 0; i < heads.size (); i++)
68 int j = Staff_symbol_referencer::get_rounded_position (se);
69 iv.unite (Slice (j, j));
75 Note_column::dir (Grob *me)
77 Grob *stem = unsmob_grob (me->get_object ("stem"));
78 if (stem && Stem::has_interface (stem))
79 return get_grob_direction (stem);
82 extract_grob_set (me, "note-heads", heads);
84 return (Direction)sign (head_positions_interval (me).center ());
87 programming_error ("note column without heads and stem");
92 Note_column::set_stem (Grob *me, Grob *stem)
94 me->set_object ("stem", stem->self_scm ());
95 Axis_group_interface::add_element (me, stem);
99 Note_column::get_rest (Grob *me)
101 return unsmob_grob (me->get_object ("rest"));
105 Note_column::add_head (Grob *me, Grob *h)
108 if (Rest::has_interface (h))
110 extract_grob_set (me, "note-heads", heads);
114 me->set_object ("rest", h->self_scm ());
116 else if (Note_head::has_interface (h))
118 if (unsmob_grob (me->get_object ("rest")))
120 Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), h);
124 me->warning (_ ("cannot have note heads and rests together on a stem"));
126 Axis_group_interface::add_element (me, h);
130 translate the rest symbols vertically by amount DY, but only if
131 they have no staff-position set.
134 Note_column::translate_rests (Grob *me, int dy)
136 Grob *r = unsmob_grob (me->get_object ("rest"));
137 if (r && !scm_is_number (r->get_property ("staff-position")))
139 r->translate_axis (dy * Staff_symbol_referencer::staff_space (r) / 2.0, Y_AXIS);
140 Grob *p = r->get_parent (Y_AXIS);
141 p->flush_extent_cache (Y_AXIS);
146 Note_column::set_dotcol (Grob *me, Grob *d)
148 Axis_group_interface::add_element (me, d);
152 Note_column::first_head (Grob *me)
154 Grob *st = get_stem (me);
155 return st ? Stem::first_head (st) : 0;
159 Return the first Accidentals grob that we find in a note-head.
162 Note_column::accidentals (Grob *me)
164 extract_grob_set (me, "note-heads", heads);
166 for (vsize i = 0; i < heads.size (); i++)
169 acc = h ? unsmob_grob (h->get_object ("accidental-grob")) : 0;
177 if (Accidental_placement::has_interface (acc->get_parent (X_AXIS)))
178 return acc->get_parent (X_AXIS);
185 Note_column::arpeggio (Grob *me)
187 return unsmob_grob (me->get_object ("arpeggio"));
190 ADD_INTERFACE (Note_column,
191 "Stem and noteheads combined",