2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
27 #include "axis-group-interface.hh"
28 #include "directional-element-interface.hh"
29 #include "dot-column.hh"
30 #include "dot-configuration.hh"
31 #include "dot-formatting-problem.hh"
34 #include "note-head.hh"
35 #include "pointer-group-interface.hh"
37 #include "rhythmic-head.hh"
38 #include "side-position-interface.hh"
39 #include "staff-symbol-referencer.hh"
42 MAKE_SCHEME_CALLBACK (Dot_column, calc_positioning_done, 1);
44 Dot_column::calc_positioning_done (SCM smob)
46 Grob *me = unsmob<Grob> (smob);
49 Trigger note collision resolution first, since that may kill off
52 if (Grob *collision = unsmob<Grob> (me->get_object ("note-collision")))
53 (void) collision->get_property ("positioning-done");
55 me->set_property ("positioning-done", SCM_BOOL_T);
58 = extract_grob_array (me, "dots");
60 vector<Grob *> parent_stems;
64 for (vsize i = 0; i < dots.size (); i++)
66 Grob *n = dots[i]->get_parent (Y_AXIS);
67 commonx = n->common_refpoint (commonx, X_AXIS);
69 if (Grob *stem = unsmob<Grob> (n->get_object ("stem")))
71 commonx = stem->common_refpoint (commonx, X_AXIS);
73 if (Stem::first_head (stem) == n)
74 parent_stems.push_back (stem);
81 extract_grob_set (me, "side-support-elements", support);
84 for (vsize i = 0; i < parent_stems.size (); i++)
85 base_x.unite (Stem::first_head (parent_stems[i])->extent (commonx, X_AXIS));
87 for (vsize i = 0; i < support.size (); i++)
91 ss = Staff_symbol_referencer::staff_space (s);
93 /* can't inspect Y extent of rest.
95 Rest collisions should wait after line breaking.
98 if (has_interface<Rest> (s))
100 base_x.unite (s->extent (commonx, X_AXIS));
103 else if (has_interface<Stem> (s))
105 Real y1 = Stem::head_positions (s)[-get_grob_direction (s)];
106 Real y2 = y1 + get_grob_direction (s) * 7;
113 else if (has_interface<Note_head> (s))
114 y = Interval (-1.1, 1.1);
117 programming_error ("unknown grob in dot col support");
121 y += Staff_symbol_referencer::get_position (s);
123 Box b (s->extent (commonx, X_AXIS), y);
126 if (Grob *stem = unsmob<Grob> (s->get_object ("stem")))
130 for (set<Grob *>::const_iterator i (stems.begin ());
131 i != stems.end (); i++)
134 Grob *flag = Stem::flag (stem);
137 Grob *commony = stem->common_refpoint (flag, Y_AXIS);
138 Interval y = flag->extent (commony, Y_AXIS) * (2 / ss);
139 Interval x = flag->extent (commonx, X_AXIS);
141 boxes.push_back (Box (x, y));
146 The use of pure_position_less and pure_get_rounded_position below
147 are due to the fact that this callback is called before line breaking
148 occurs. Because dots' actual Y posiitons may be linked to that of
149 beams (dots are attached to rests, which are shifted to avoid beams),
150 we instead must use their pure Y positions.
152 vector_sort (dots, pure_position_less);
154 SCM chord_dots_limit = me->get_property ("chord-dots-limit");
155 if (scm_is_number (chord_dots_limit))
157 // Sort dots by stem, then check for dots above the limit for each stem
158 vector <vector <Grob *> > dots_each_stem (parent_stems.size ());
159 for (vsize i = 0; i < dots.size (); i++)
160 if (Grob *stem = unsmob<Grob> (dots[i]->get_parent (Y_AXIS)
161 -> get_object ("stem")))
162 for (vsize j = 0; j < parent_stems.size (); j++)
163 if (stem == parent_stems[j])
165 dots_each_stem[j].push_back (dots[i]);
168 for (vsize j = 0; j < parent_stems.size (); j++)
170 Interval chord = Stem::head_positions (parent_stems[j]);
171 int total_room = ((int) chord.length () + 2
172 + scm_to_int (chord_dots_limit)) / 2;
173 int total_dots = dots_each_stem[j].size ();
174 // remove excessive dots from the ends of the stem
175 for (int first_dot = 0; total_dots > total_room; total_dots--)
176 if (0 == (total_dots - total_room) % 2)
177 dots_each_stem[j][first_dot++]->suicide ();
179 dots_each_stem[j][first_dot + total_dots - 1]->suicide ();
183 for (vsize i = dots.size (); i--;)
185 if (!dots[i]->is_live ())
186 dots.erase (dots.begin () + i);
188 // Undo any fake translations that were done in add_head.
189 dots[i]->translate_axis (-dots[i]->relative_coordinate (me, X_AXIS), X_AXIS);
192 Dot_formatting_problem problem (boxes, base_x);
194 Dot_configuration cfg (problem);
195 for (vsize i = 0; i < dots.size (); i++)
200 Grob *note = dots[i]->get_parent (Y_AXIS);
203 if (has_interface<Note_head> (note))
204 dp.dir_ = to_dir (dp.dot_->get_property ("direction"));
206 dp.x_extent_ = note->extent (commonx, X_AXIS);
209 int p = Staff_symbol_referencer::pure_get_rounded_position (dp.dot_);
211 /* icky, since this should go via a Staff_symbol_referencer
212 offset callback but adding a dot overwrites Y-offset. */
213 p += (int) robust_scm2double (dp.dot_->get_property ("staff-position"), 0.0);
216 cfg.remove_collision (p);
218 if (Staff_symbol_referencer::on_line (dp.dot_, p)
219 && !scm_is_eq (dp.dot_->get_property ("style"),
220 ly_symbol2scm ("kievan")))
221 cfg.remove_collision (p);
224 problem.register_configuration (cfg);
226 for (Dot_configuration::const_iterator i (cfg.begin ());
227 i != cfg.end (); i++)
232 Staff_symbol_referencer::pure_set_position (i->second.dot_, i->first);
235 me->translate_axis (cfg.x_offset () - me->relative_coordinate (commonx, X_AXIS),
241 Dot_column::add_head (Grob *me, Grob *head)
243 Grob *d = unsmob<Grob> (head->get_object ("dot"));
246 Side_position_interface::add_support (me, head);
248 Pointer_group_interface::add_grob (me, ly_symbol2scm ("dots"), d);
249 d->set_property ("Y-offset", Grob::x_parent_positioning_proc);
250 // Dot formatting requests the Y-offset, which for rests may
251 // trigger post-linebreak callbacks. On the other hand, we need the
252 // correct X-offset of the dots for horizontal collision avoidance.
253 // The translation here is undone in calc_positioning_done, where we
254 // do the X-offset properly.
255 if (has_interface<Rest> (head))
256 d->translate_axis (head->extent (head, X_AXIS).length (), X_AXIS);
258 d->set_property ("X-offset", Grob::x_parent_positioning_proc);
259 Axis_group_interface::add_element (me, d);
263 ADD_INTERFACE (Dot_column,
264 "Group dot objects so they form a column, and position"
265 " dots so they do not clash with staff lines.",