2 dot-column.cc -- implement Dot_column
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "dot-column.hh"
17 #include "rhythmic-head.hh"
18 #include "staff-symbol-referencer.hh"
19 #include "directional-element-interface.hh"
20 #include "side-position-interface.hh"
21 #include "axis-group-interface.hh"
23 #include "pointer-group-interface.hh"
26 TODO: let Dot_column communicate with stem via Note_column.
29 MAKE_SCHEME_CALLBACK (Dot_column, side_position, 1);
31 Dot_column::side_position (SCM smob)
33 Grob *me = unsmob_grob (smob);
34 Grob *stem = unsmob_grob (me->get_object ("stem"));
36 && !Stem::get_beam (stem)
37 && Stem::duration_log (stem) > 2
38 && !Stem::is_invisible (stem))
41 trigger stem end & direction calculation.
43 This will add the stem to the support if a flag collision happens.
45 stem->get_property ("stem-end-position");
48 return Side_position_interface::x_aligned_side (smob);
66 typedef map<int, Dot_position> Dot_configuration;
72 dot_config_badness (Dot_configuration const &cfg)
75 for (Dot_configuration::const_iterator i (cfg.begin ());
79 int demerit = sqr (p - i->second.pos_) * 2;
81 int dot_move_dir = sign (p - i->second.pos_);
82 if (i->second.extremal_head_)
85 && dot_move_dir != i->second.dir_)
87 else if (dot_move_dir != UP)
90 else if (dot_move_dir != UP)
100 print_dot_configuration (Dot_configuration const &cfg)
102 printf ("dotconf { ");
103 for (Dot_configuration::const_iterator i (cfg.begin ());
104 i != cfg.end (); i++)
105 printf ("%d, ", i->first);
110 Shift K and following (preceding) entries up (down) as necessary to
111 prevent staffline collisions if D is up (down).
113 If K is in CFG, then do nothing.
117 shift_one (Dot_configuration const &cfg,
120 Dot_configuration new_cfg;
125 for (Dot_configuration::const_iterator i (cfg.begin ());
126 i != cfg.end (); i++)
131 if (Staff_symbol_referencer::on_line (i->second.dot_, p))
138 new_cfg[p] = i->second;
142 if (new_cfg.find (p) == new_cfg.end ())
144 new_cfg[p + offset] = i->second;
150 Dot_configuration::const_iterator i (cfg.end ());
158 if (Staff_symbol_referencer::on_line (i->second.dot_, p))
165 new_cfg[p] = i->second;
169 if (new_cfg.find (p) == new_cfg.end ())
172 new_cfg[p + offset] = i->second;
175 while (i != cfg.begin ());
182 Remove the collision in CFG either by shifting up or down, whichever
186 remove_collision (Dot_configuration &cfg, int p)
188 bool collide = cfg.find (p) != cfg.end ();
192 Dot_configuration cfg_up = shift_one (cfg, p, UP);
193 Dot_configuration cfg_down = shift_one (cfg, p, DOWN);
195 int b_up = dot_config_badness (cfg_up);
196 int b_down = dot_config_badness (cfg_down);
198 cfg = (b_up < b_down) ? cfg_up : cfg_down;
202 MAKE_SCHEME_CALLBACK(Dot_column, calc_positioning_done, 1);
204 Dot_column::calc_positioning_done (SCM smob)
206 Grob *me = unsmob_grob (smob);
207 Link_array<Grob> dots
208 = extract_grob_array (me, "dots");
211 Trigger note collision resolution first, since that may kill off
215 for (int i = dots.size (); i--;)
217 Grob *n = dots[i]->get_parent (Y_AXIS);
219 c = n->common_refpoint (c, X_AXIS);
223 for (int i = dots.size (); i--;)
225 Grob *n = dots[i]->get_parent (Y_AXIS);
226 n->relative_coordinate (c, X_AXIS);
230 dots.sort (compare_position);
231 for (int i = dots.size (); i--;)
232 if (!dots[i]->is_live ())
235 Dot_configuration cfg;
236 for (int i = 0;i < dots.size (); i++)
241 Grob *note = dots[i]->get_parent (Y_AXIS);
244 Grob *stem = unsmob_grob (note->get_object ("stem"));
246 dp.extremal_head_ = Stem::first_head (stem) == note;
249 int p = Staff_symbol_referencer::get_rounded_position (dp.dot_);
252 if (dp.extremal_head_)
253 dp.dir_ = to_dir (dp.dot_->get_property ("direction"));
255 remove_collision (cfg, p);
257 if (Staff_symbol_referencer::on_line (dp.dot_, p))
258 remove_collision (cfg, p);
261 for (Dot_configuration::const_iterator i (cfg.begin ());
262 i != cfg.end (); i++)
267 Staff_symbol_referencer::set_position (i->second.dot_, i->first);
273 Dot_column::add_head (Grob *me, Grob *rh)
275 Grob *d = unsmob_grob (rh->get_object ("dot"));
278 Side_position_interface::add_support (me, rh);
280 Pointer_group_interface::add_grob (me, ly_symbol2scm ("dots"), d);
281 d->set_property ("Y-offset", Grob::x_parent_positioning_proc);
282 Axis_group_interface::add_element (me, d);
286 ADD_INTERFACE (Dot_column,
287 "dot-column-interface",
289 "Groups dot objects so they form a column, and position dots so they do not "
290 "clash with staff lines ",