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"
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, 2);
31 Dot_column::side_position (SCM element_smob, SCM axis)
33 Grob *me = unsmob_grob (element_smob);
35 assert (scm_to_int (axis) == X_AXIS);
37 Grob *stem = unsmob_grob (me->get_object ("stem"));
39 && !Stem::get_beam (stem)
40 && Stem::duration_log (stem) > 2
41 && !Stem::is_invisible (stem))
44 trigger stem end & direction calculation.
46 This will add the stem to the support if a flag collision happens.
48 stem->get_property ("stem-end-position");
51 return Side_position_interface::aligned_side (element_smob, axis);
69 typedef map<int, Dot_position> Dot_configuration;
75 dot_config_badness (Dot_configuration const &cfg)
78 for (Dot_configuration::const_iterator i (cfg.begin ());
82 int demerit = sqr (p - i->second.pos_) * 2;
84 int dot_move_dir = sign (p - i->second.pos_);
85 if (i->second.extremal_head_)
88 && dot_move_dir != i->second.dir_)
90 else if (dot_move_dir != UP)
93 else if (dot_move_dir != UP)
103 print_dot_configuration (Dot_configuration const &cfg)
105 printf ("dotconf { ");
106 for (Dot_configuration::const_iterator i (cfg.begin ());
107 i != cfg.end (); i++)
108 printf ("%d, ", i->first);
113 Shift K and following (preceding) entries up (down) as necessary to
114 prevent staffline collisions if D is up (down).
116 If K is in CFG, then do nothing.
120 shift_one (Dot_configuration const &cfg,
123 Dot_configuration new_cfg;
128 for (Dot_configuration::const_iterator i (cfg.begin ());
129 i != cfg.end (); i++)
134 if (Staff_symbol_referencer::on_staffline (i->second.dot_, p))
141 new_cfg[p] = i->second;
145 if (new_cfg.find (p) == new_cfg.end ())
147 new_cfg[p + offset] = i->second;
153 Dot_configuration::const_iterator i (cfg.end ());
161 if (Staff_symbol_referencer::on_staffline (i->second.dot_, p))
168 new_cfg[p] = i->second;
172 if (new_cfg.find (p) == new_cfg.end ())
175 new_cfg[p + offset] = i->second;
178 while (i != cfg.begin ());
185 Remove the collision in CFG either by shifting up or down, whichever
189 remove_collision (Dot_configuration &cfg, int p)
191 bool collide = cfg.find (p) != cfg.end ();
195 Dot_configuration cfg_up = shift_one (cfg, p, UP);
196 Dot_configuration cfg_down = shift_one (cfg, p, DOWN);
198 int b_up = dot_config_badness (cfg_up);
199 int b_down = dot_config_badness (cfg_down);
201 cfg = (b_up < b_down) ? cfg_up : cfg_down;
205 MAKE_SCHEME_CALLBACK(Dot_column, calc_positioning_done, 1);
207 Dot_column::calc_positioning_done (SCM smob)
209 Grob *me = unsmob_grob (smob);
210 Link_array<Grob> dots
211 = extract_grob_array (me, "dots");
214 Trigger note collision resolution first, since that may kill off
218 for (int i = dots.size (); i--;)
220 Grob *n = dots[i]->get_parent (Y_AXIS);
222 c = n->common_refpoint (c, X_AXIS);
226 for (int i = dots.size (); i--;)
228 Grob *n = dots[i]->get_parent (Y_AXIS);
229 n->relative_coordinate (c, X_AXIS);
233 dots.sort (compare_position);
234 for (int i = dots.size (); i--;)
235 if (!dots[i]->is_live ())
238 Dot_configuration cfg;
239 for (int i = 0;i < dots.size (); i++)
244 Grob *note = dots[i]->get_parent (Y_AXIS);
247 Grob *stem = unsmob_grob (note->get_object ("stem"));
249 dp.extremal_head_ = Stem::first_head (stem) == note;
252 int p = Staff_symbol_referencer::get_rounded_position (dp.dot_);
255 if (dp.extremal_head_)
256 dp.dir_ = to_dir (dp.dot_->get_property ("direction"));
258 remove_collision (cfg, p);
260 if (Staff_symbol_referencer::on_staffline (dp.dot_, p))
261 remove_collision (cfg, p);
264 for (Dot_configuration::const_iterator i (cfg.begin ());
265 i != cfg.end (); i++)
266 Staff_symbol_referencer::set_position (i->second.dot_, i->first);
272 Dot_column::add_head (Grob *me, Grob *rh)
274 Grob *d = unsmob_grob (rh->get_object ("dot"));
277 Side_position_interface::add_support (me, rh);
279 Pointer_group_interface::add_grob (me, ly_symbol2scm ("dots"), d);
280 d->add_offset_callback (Grob::other_axis_parent_positioning_proc, Y_AXIS);
281 Axis_group_interface::add_element (me, d);
285 ADD_INTERFACE (Dot_column,
286 "dot-column-interface",
288 "Groups dot objects so they form a column, and position dots so they do not "
289 "clash with staff lines ",