2 dot-column.cc -- implement Dot_column
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "dot-column.hh"
16 #include "rhythmic-head.hh"
17 #include "staff-symbol-referencer.hh"
18 #include "directional-element-interface.hh"
19 #include "side-position-interface.hh"
20 #include "axis-group-interface.hh"
22 #include "pointer-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);
34 assert (scm_to_int (axis) == Y_AXIS);
35 me = me->get_parent (X_AXIS);
37 if (!to_boolean (me->get_property ("positioning-done")))
39 me->set_property ("positioning-done", SCM_BOOL_T);
43 return scm_make_real (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);
52 assert (scm_to_int (axis) == X_AXIS);
54 Grob *stem = unsmob_grob (me->get_object ("stem"));
56 && !Stem::get_beam (stem)
57 && Stem::duration_log (stem) > 2
58 && !Stem::is_invisible (stem))
61 trigger stem end & direction calculation.
63 This will add the stem to the support if a flag collision happens.
65 Stem::stem_end_position (stem);
67 return Side_position_interface::aligned_side (element_smob, axis);
85 typedef std::map<int, Dot_position> Dot_configuration;
91 dot_config_badness (Dot_configuration const &cfg)
94 for (Dot_configuration::const_iterator i (cfg.begin ());
98 int demerit = sqr (p - i->second.pos_) * 2;
100 int dot_move_dir = sign (p - i->second.pos_);
101 if (i->second.extremal_head_)
104 && dot_move_dir != i->second.dir_)
106 else if (dot_move_dir != UP)
109 else if (dot_move_dir != UP)
119 print_dot_configuration (Dot_configuration const &cfg)
121 printf ("dotconf { ");
122 for (Dot_configuration::const_iterator i (cfg.begin ());
123 i != cfg.end (); i++)
124 printf ("%d, ", i->first);
129 Shift K and following (preceding) entries up (down) as necessary to
130 prevent staffline collisions if D is up (down).
132 If K is in CFG, then do nothing.
136 shift_one (Dot_configuration const &cfg,
139 Dot_configuration new_cfg;
144 for (Dot_configuration::const_iterator i (cfg.begin ());
145 i != cfg.end (); i++)
150 if (Staff_symbol_referencer::on_staffline (i->second.dot_, p))
157 new_cfg[p] = i->second;
161 if (new_cfg.find (p) == new_cfg.end ())
165 new_cfg[p + offset] = i->second;
171 Dot_configuration::const_iterator i (cfg.end ());
179 if (Staff_symbol_referencer::on_staffline (i->second.dot_, p))
186 new_cfg[p] = i->second;
190 if (new_cfg.find (p) == new_cfg.end ())
195 new_cfg[p + offset] = i->second;
198 while (i != cfg.begin ());
205 Remove the collision in CFG either by shifting up or down, whichever
209 remove_collision (Dot_configuration &cfg, int p)
211 bool collide = cfg.find (p) != cfg.end ();
215 Dot_configuration cfg_up = shift_one (cfg, p, UP);
216 Dot_configuration cfg_down = shift_one (cfg, p, DOWN);
218 int b_up = dot_config_badness (cfg_up);
219 int b_down = dot_config_badness (cfg_down);
221 cfg = (b_up < b_down) ? cfg_up : cfg_down;
226 Dot_column::do_shifts (Grob *me)
228 Link_array<Grob> dots
229 = extract_grob_array (me, "dots");
232 Trigger note collision resolution first, since that may kill off
236 for (int i = dots.size (); i--;)
238 Grob *n = dots[i]->get_parent (Y_AXIS);
240 c = n->common_refpoint (c, X_AXIS);
244 for (int i = dots.size (); i--;)
246 Grob *n = dots[i]->get_parent (Y_AXIS);
247 n->relative_coordinate (c, X_AXIS);
251 dots.sort (compare_position);
252 for (int i = dots.size (); i--;)
253 if (!dots[i]->is_live ())
256 Dot_configuration cfg;
257 for (int i = 0;i < dots.size (); i++)
262 Grob *note = dots[i]->get_parent (Y_AXIS);
265 Grob *stem = unsmob_grob (note->get_object ("stem"));
267 dp.extremal_head_ = Stem::first_head (stem) == note;
270 int p = Staff_symbol_referencer::get_rounded_position (dp.dot_);
273 if (dp.extremal_head_)
274 dp.dir_ = to_dir (dp.dot_->get_property ("direction"));
276 remove_collision (cfg, p);
278 if (Staff_symbol_referencer::on_staffline (dp.dot_, p))
279 remove_collision (cfg, p);
282 for (Dot_configuration::const_iterator i (cfg.begin ());
283 i != cfg.end (); i++)
285 Staff_symbol_referencer::set_position (i->second.dot_, i->first);
288 return SCM_UNSPECIFIED;
292 Dot_column::add_head (Grob *me, Grob *rh)
294 Grob *d = unsmob_grob (rh->get_object ("dot"));
297 Side_position_interface::add_support (me, rh);
299 Pointer_group_interface::add_grob (me, ly_symbol2scm ("dots"), d);
300 d->add_offset_callback (Dot_column::force_shift_callback_proc, Y_AXIS);
301 Axis_group_interface::add_element (me, d);
305 ADD_INTERFACE (Dot_column, "dot-column-interface",
306 "Groups dot objects so they form a column, and position dots so they do not "
307 "clash with staff lines ",
308 "positioning-done direction stem");