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, force_shift_callback, 2);
31 Dot_column::force_shift_callback (SCM element_smob, SCM axis)
33 Grob *me = unsmob_grob (element_smob);
35 assert (scm_to_int (axis) == Y_AXIS);
36 me = me->get_parent (X_AXIS);
38 if (!to_boolean (me->get_property ("positioning-done")))
40 me->set_property ("positioning-done", SCM_BOOL_T);
44 return scm_from_double (0.0);
47 MAKE_SCHEME_CALLBACK (Dot_column, side_position, 2);
49 Dot_column::side_position (SCM element_smob, SCM axis)
51 Grob *me = unsmob_grob (element_smob);
53 assert (scm_to_int (axis) == X_AXIS);
55 Grob *stem = unsmob_grob (me->get_object ("stem"));
57 && !Stem::get_beam (stem)
58 && Stem::duration_log (stem) > 2
59 && !Stem::is_invisible (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);
86 typedef map<int, Dot_position> Dot_configuration;
92 dot_config_badness (Dot_configuration const &cfg)
95 for (Dot_configuration::const_iterator i (cfg.begin ());
99 int demerit = sqr (p - i->second.pos_) * 2;
101 int dot_move_dir = sign (p - i->second.pos_);
102 if (i->second.extremal_head_)
105 && dot_move_dir != i->second.dir_)
107 else if (dot_move_dir != UP)
110 else if (dot_move_dir != UP)
120 print_dot_configuration (Dot_configuration const &cfg)
122 printf ("dotconf { ");
123 for (Dot_configuration::const_iterator i (cfg.begin ());
124 i != cfg.end (); i++)
125 printf ("%d, ", i->first);
130 Shift K and following (preceding) entries up (down) as necessary to
131 prevent staffline collisions if D is up (down).
133 If K is in CFG, then do nothing.
137 shift_one (Dot_configuration const &cfg,
140 Dot_configuration new_cfg;
145 for (Dot_configuration::const_iterator i (cfg.begin ());
146 i != cfg.end (); i++)
151 if (Staff_symbol_referencer::on_staffline (i->second.dot_, p))
158 new_cfg[p] = i->second;
162 if (new_cfg.find (p) == new_cfg.end ())
164 new_cfg[p + offset] = i->second;
170 Dot_configuration::const_iterator i (cfg.end ());
178 if (Staff_symbol_referencer::on_staffline (i->second.dot_, p))
185 new_cfg[p] = i->second;
189 if (new_cfg.find (p) == new_cfg.end ())
192 new_cfg[p + offset] = i->second;
195 while (i != cfg.begin ());
202 Remove the collision in CFG either by shifting up or down, whichever
206 remove_collision (Dot_configuration &cfg, int p)
208 bool collide = cfg.find (p) != cfg.end ();
212 Dot_configuration cfg_up = shift_one (cfg, p, UP);
213 Dot_configuration cfg_down = shift_one (cfg, p, DOWN);
215 int b_up = dot_config_badness (cfg_up);
216 int b_down = dot_config_badness (cfg_down);
218 cfg = (b_up < b_down) ? cfg_up : cfg_down;
223 Dot_column::do_shifts (Grob *me)
225 Link_array<Grob> dots
226 = extract_grob_array (me, "dots");
229 Trigger note collision resolution first, since that may kill off
233 for (int i = dots.size (); i--;)
235 Grob *n = dots[i]->get_parent (Y_AXIS);
237 c = n->common_refpoint (c, X_AXIS);
241 for (int i = dots.size (); i--;)
243 Grob *n = dots[i]->get_parent (Y_AXIS);
244 n->relative_coordinate (c, X_AXIS);
248 dots.sort (compare_position);
249 for (int i = dots.size (); i--;)
250 if (!dots[i]->is_live ())
253 Dot_configuration cfg;
254 for (int i = 0;i < dots.size (); i++)
259 Grob *note = dots[i]->get_parent (Y_AXIS);
262 Grob *stem = unsmob_grob (note->get_object ("stem"));
264 dp.extremal_head_ = Stem::first_head (stem) == note;
267 int p = Staff_symbol_referencer::get_rounded_position (dp.dot_);
270 if (dp.extremal_head_)
271 dp.dir_ = to_dir (dp.dot_->get_property ("direction"));
273 remove_collision (cfg, p);
275 if (Staff_symbol_referencer::on_staffline (dp.dot_, p))
276 remove_collision (cfg, p);
279 for (Dot_configuration::const_iterator i (cfg.begin ());
280 i != cfg.end (); i++)
281 Staff_symbol_referencer::set_position (i->second.dot_, i->first);
283 return SCM_UNSPECIFIED;
287 Dot_column::add_head (Grob *me, Grob *rh)
289 Grob *d = unsmob_grob (rh->get_object ("dot"));
292 Side_position_interface::add_support (me, rh);
294 Pointer_group_interface::add_grob (me, ly_symbol2scm ("dots"), d);
295 d->add_offset_callback (Dot_column::force_shift_callback_proc, Y_AXIS);
296 Axis_group_interface::add_element (me, d);
300 ADD_INTERFACE (Dot_column, "dot-column-interface",
301 "Groups dot objects so they form a column, and position dots so they do not "
302 "clash with staff lines ",
303 "positioning-done direction stem");