2 dot-column.cc -- implement Dot_column
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
13 #include "dot-column.hh"
14 #include "rhythmic-head.hh"
15 #include "group-interface.hh"
16 #include "staff-symbol-referencer.hh"
17 #include "directional-element-interface.hh"
18 #include "side-position-interface.hh"
19 #include "axis-group-interface.hh"
25 TODO: let Dot_column communicate with stem via Note_column.
28 MAKE_SCHEME_CALLBACK (Dot_column,force_shift_callback,2);
30 Dot_column::force_shift_callback (SCM element_smob, SCM axis)
32 Grob *me = unsmob_grob (element_smob);
33 Axis a = (Axis) gh_scm2int (axis);
35 me = me->get_parent (X_AXIS);
37 if (!to_boolean (me->get_grob_property ("collision-done")))
39 me->set_grob_property ("collision-done", SCM_BOOL_T);
43 return gh_double2scm (0.0);
46 MAKE_SCHEME_CALLBACK(Dot_column,side_position, 2);
48 Dot_column::side_position (SCM element_smob, SCM axis)
50 Grob *me = unsmob_grob (element_smob);
51 Axis a = (Axis) gh_scm2int (axis);
54 Grob * stem = unsmob_grob (me->get_grob_property ("stem"));
56 && !Stem::get_beam (stem)
57 && Stem::duration_log (stem) > 2
58 && !Stem::invisible_b (stem)
62 trigger stem end & direction calculation.
64 This will add the stem to the support if a flag collision happens.
66 Stem::stem_end_position (stem);
68 return Side_position_interface::aligned_side (element_smob, axis);
90 typedef std::map<int, Dot_position> Dot_configuration;
97 dot_config_badness (Dot_configuration const &cfg)
100 for (Dot_configuration::const_iterator i (cfg.begin ());
101 i != cfg.end (); i++)
104 int demerit = sqr (p - i->second.pos_) * 2;
106 int dot_move_dir = sign (p - i->second.pos_);
107 if (i->second.extremal_head_)
110 && dot_move_dir != i->second.dir_)
112 else if (dot_move_dir != UP)
115 else if (dot_move_dir != UP)
125 print_dot_configuration (Dot_configuration const &cfg)
127 printf ("dotconf { ");
128 for (Dot_configuration::const_iterator i (cfg.begin ());
129 i != cfg.end (); i++)
130 printf ("%d, " , i->first);
135 Shift K and following (preceding) entries up (down) as necessary to
136 prevent staffline collisions if D is up (down).
138 If K is in CFG, then do nothing.
142 shift_one (Dot_configuration const &cfg,
145 Dot_configuration new_cfg;
150 for (Dot_configuration::const_iterator i (cfg.begin ());
151 i != cfg.end (); i++)
156 if (Staff_symbol_referencer::on_staffline (i->second.dot_, p))
163 new_cfg[p] = i->second;
167 if (new_cfg.find (p) == new_cfg.end ())
171 new_cfg[p + offset] = i->second;
177 Dot_configuration::const_iterator i (cfg.end ());
185 if (Staff_symbol_referencer::on_staffline (i->second.dot_, p))
192 new_cfg[p] = i->second;
196 if (new_cfg.find (p) == new_cfg.end ())
201 new_cfg[p + offset] = i->second;
204 while (i != cfg.begin ());
211 Remove the collision in CFG either by shifting up or down, whichever
215 remove_collision (Dot_configuration &cfg, int p)
217 bool collide = cfg.find (p) != cfg.end ();
221 Dot_configuration cfg_up = shift_one (cfg, p, UP);
222 Dot_configuration cfg_down = shift_one (cfg, p, DOWN);
224 int b_up = dot_config_badness (cfg_up);
225 int b_down = dot_config_badness (cfg_down);
227 cfg = (b_up < b_down) ? cfg_up : cfg_down;
232 Dot_column::do_shifts (Grob*me)
234 Link_array<Grob> dots =
235 Pointer_group_interface__extract_grobs (me, (Grob*)0, "dots");
237 dots.sort (compare_position);
238 for (int i = dots.size (); i--;)
239 if (!dots[i]->live ())
242 Dot_configuration cfg;
243 for (int i =0;i < dots.size (); i++)
248 Grob * note = dots[i]->get_parent (Y_AXIS);
251 Grob *stem = unsmob_grob (note->get_grob_property ("stem"));
253 dp.extremal_head_ = Stem::first_head (stem) == note;
256 int p = int (Staff_symbol_referencer::get_position (dp.dot_));
259 if (dp.extremal_head_)
260 dp.dir_ = to_dir (dp.dot_->get_grob_property ("direction"));
262 remove_collision (cfg, p);
264 if (Staff_symbol_referencer::on_staffline (dp.dot_, p))
265 remove_collision (cfg, p);
268 for (Dot_configuration::const_iterator i (cfg.begin ());
269 i != cfg.end (); i++)
271 Staff_symbol_referencer::set_position (i->second.dot_, i->first);
274 return SCM_UNSPECIFIED;
278 Dot_column::add_head (Grob * me, Grob *rh)
280 Grob * d = unsmob_grob (rh->get_grob_property ("dot"));
283 Side_position_interface::add_support (me,rh);
285 Pointer_group_interface::add_grob (me, ly_symbol2scm ("dots"), d);
286 d->add_offset_callback (Dot_column::force_shift_callback_proc , Y_AXIS);
287 Axis_group_interface::add_element (me, d);
294 ADD_INTERFACE (Dot_column, "dot-column-interface",
295 "Interface that groups dots so they form a column",