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 "dot-column.hh"
18 #include "rhythmic-head.hh"
19 #include "staff-symbol-referencer.hh"
20 #include "directional-element-interface.hh"
21 #include "side-position-interface.hh"
22 #include "axis-group-interface.hh"
24 #include "pointer-group-interface.hh"
27 TODO: let Dot_column communicate with stem via Note_column.
30 MAKE_SCHEME_CALLBACK (Dot_column, side_position, 1);
32 Dot_column::side_position (SCM smob)
34 Grob *me = unsmob_grob (smob);
35 extract_grob_set (me, "dots", dots);
37 for (vsize i = 0; i < dots.size (); i++)
39 Grob *head = dots[i]->get_parent (Y_AXIS);
40 Grob *stem = head ? unsmob_grob (head->get_object ("stem")) : 0;
42 && !Stem::get_beam (stem)
43 && Stem::duration_log (stem) > 2
44 && !Stem::is_invisible (stem))
47 trigger stem end & direction calculation.
49 This will add the stem to the support if a flag collision happens.
51 stem->get_property ("stem-end-position");
55 return Side_position_interface::x_aligned_side (smob, SCM_EOL);
70 extremal_head_ = false;
74 typedef map<int, Dot_position> Dot_configuration;
80 dot_config_badness (Dot_configuration const &cfg)
83 for (Dot_configuration::const_iterator i (cfg.begin ());
87 int demerit = sqr (p - i->second.pos_) * 2;
89 int dot_move_dir = sign (p - i->second.pos_);
90 if (i->second.extremal_head_)
93 && dot_move_dir != i->second.dir_)
95 else if (dot_move_dir != UP)
98 else if (dot_move_dir != UP)
108 print_dot_configuration (Dot_configuration const &cfg)
110 printf ("dotconf { ");
111 for (Dot_configuration::const_iterator i (cfg.begin ());
112 i != cfg.end (); i++)
113 printf ("%d, ", i->first);
118 Shift K and following (preceding) entries up (down) as necessary to
119 prevent staffline collisions if D is up (down).
121 If K is in CFG, then do nothing.
125 shift_one (Dot_configuration const &cfg,
128 Dot_configuration new_cfg;
133 for (Dot_configuration::const_iterator i (cfg.begin ());
134 i != cfg.end (); i++)
139 if (Staff_symbol_referencer::on_line (i->second.dot_, p))
146 new_cfg[p] = i->second;
150 if (new_cfg.find (p) == new_cfg.end ())
152 new_cfg[p + offset] = i->second;
158 Dot_configuration::const_iterator i (cfg.end ());
166 if (Staff_symbol_referencer::on_line (i->second.dot_, p))
173 new_cfg[p] = i->second;
177 if (new_cfg.find (p) == new_cfg.end ())
180 new_cfg[p + offset] = i->second;
183 while (i != cfg.begin ());
190 Remove the collision in CFG either by shifting up or down, whichever
194 remove_collision (Dot_configuration &cfg, int p)
196 bool collide = cfg.find (p) != cfg.end ();
200 Dot_configuration cfg_up = shift_one (cfg, p, UP);
201 Dot_configuration cfg_down = shift_one (cfg, p, DOWN);
203 int b_up = dot_config_badness (cfg_up);
204 int b_down = dot_config_badness (cfg_down);
206 cfg = (b_up < b_down) ? cfg_up : cfg_down;
210 MAKE_SCHEME_CALLBACK(Dot_column, calc_positioning_done, 1);
212 Dot_column::calc_positioning_done (SCM smob)
214 Grob *me = unsmob_grob (smob);
216 = extract_grob_array (me, "dots");
219 Trigger note collision resolution first, since that may kill off
223 for (vsize i = dots.size (); i--;)
225 Grob *n = dots[i]->get_parent (Y_AXIS);
227 c = n->common_refpoint (c, X_AXIS);
231 for (vsize i = dots.size (); i--;)
233 Grob *n = dots[i]->get_parent (Y_AXIS);
234 n->relative_coordinate (c, X_AXIS);
238 vector_sort (dots, position_less);
239 for (vsize i = dots.size (); i--;)
240 if (!dots[i]->is_live ())
241 dots.erase (dots.begin () + i);
243 Dot_configuration cfg;
244 for (vsize i = 0;i < dots.size (); i++)
249 Grob *note = dots[i]->get_parent (Y_AXIS);
252 Grob *stem = unsmob_grob (note->get_object ("stem"));
254 dp.extremal_head_ = Stem::first_head (stem) == note;
257 int p = Staff_symbol_referencer::get_rounded_position (dp.dot_);
260 if (dp.extremal_head_)
261 dp.dir_ = to_dir (dp.dot_->get_property ("direction"));
263 remove_collision (cfg, p);
265 if (Staff_symbol_referencer::on_line (dp.dot_, p))
266 remove_collision (cfg, p);
269 for (Dot_configuration::const_iterator i (cfg.begin ());
270 i != cfg.end (); i++)
275 Staff_symbol_referencer::set_position (i->second.dot_, i->first);
281 Dot_column::add_head (Grob *me, Grob *rh)
283 Grob *d = unsmob_grob (rh->get_object ("dot"));
286 Side_position_interface::add_support (me, rh);
288 Pointer_group_interface::add_grob (me, ly_symbol2scm ("dots"), d);
289 d->set_property ("Y-offset", Grob::x_parent_positioning_proc);
290 Axis_group_interface::add_element (me, d);
294 ADD_INTERFACE (Dot_column,
295 "dot-column-interface",
297 "Groups dot objects so they form a column, and position dots so they do not "
298 "clash with staff lines ",