lily/dot-column.cc

   1 /*
   2   dot-column.cc -- implement Dot_column
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "dot-column.hh"
  10
  11 #include <cstdio>
  12 #include <cmath>
  13 #include <map>
  14 #include <set>
  15
  16 using namespace std;
  17
  18 #include "axis-group-interface.hh"
  19 #include "directional-element-interface.hh"
  20 #include "dot-column.hh"
  21 #include "dot-configuration.hh"
  22 #include "dot-formatting-problem.hh"
  23 #include "dots.hh"
  24 #include "grob.hh"
  25 #include "note-head.hh"
  26 #include "pointer-group-interface.hh"
  27 #include "rest.hh"
  28 #include "rhythmic-head.hh"
  29 #include "side-position-interface.hh"
  30 #include "staff-symbol-referencer.hh"
  31 #include "stem.hh"
  32
  33 MAKE_SCHEME_CALLBACK (Dot_column, calc_positioning_done, 1);
  34 SCM
  35 Dot_column::calc_positioning_done (SCM smob)
  36 {
  37   Grob *me = unsmob_grob (smob);
  38
  39   /*
  40     Trigger note collision resolution first, since that may kill off
  41     dots when merging.
  42   */
  43   if (Grob *collision = unsmob_grob (me->get_object ("note-collision")))
  44     (void) collision->get_property ("positioning-done");
  45
  46   me->set_property ("positioning-done", SCM_BOOL_T);
  47
  48   vector<Grob*> dots
  49     = extract_grob_array (me, "dots");
  50
  51   vector<Grob*> main_heads;
  52   Real ss = 0;
  53
  54   Grob *commonx = me;
  55   for (vsize i = 0; i < dots.size (); i++)
  56     {
  57       Grob *n = dots[i]->get_parent (Y_AXIS);
  58       commonx = n->common_refpoint (commonx, X_AXIS);
  59
  60       if (Grob *stem = unsmob_grob (n->get_object("stem")))
  61         {
  62           commonx = stem->common_refpoint (commonx, X_AXIS);
  63
  64           if (Stem::first_head (stem) == n)
  65             main_heads.push_back (n);
  66         }
  67     }
  68
  69   vector<Box> boxes;
  70   set<Grob*> stems;
  71
  72   extract_grob_set(me, "side-support-elements", support);
  73
  74   Interval base_x;
  75   for (vsize i = 0; i < main_heads.size (); i++)
  76     base_x.unite (main_heads[i]->extent (commonx, X_AXIS));
  77
  78   for (vsize i = 0; i < support.size (); i++)
  79     {
  80       Grob *s = support[i];
  81       if (!ss)
  82         ss = Staff_symbol_referencer::staff_space (s);
  83
  84       /* can't inspect Y extent of rest.
  85
  86          Rest collisions should wait after line breaking.
  87       */
  88       Interval y;
  89       if (Rest::has_interface (s))
  90         {
  91           base_x.unite (s->extent (commonx, X_AXIS));
  92           continue;
  93         }
  94       else if (Stem::has_interface (s))
  95         {
  96           Real y1 = Stem::head_positions (s)[-get_grob_direction (s)];
  97           Real y2 = y1 + get_grob_direction (s) * 7;
  98
  99           y.add_point (y1);
 100           y.add_point (y2);
 101         }
 102       else
 103         y = s->extent (s, Y_AXIS);
 104
 105       y *= 2 / ss;
 106       y += Staff_symbol_referencer::get_position (s);
 107
 108       Box b (s->extent (commonx, X_AXIS), y);
 109       boxes.push_back (b);
 110
 111       if (Grob *stem = unsmob_grob (s->get_object ("stem")))
 112         stems.insert (stem);
 113     }
 114
 115   for (set<Grob*>::const_iterator i(stems.begin());
 116        i != stems.end (); i++)
 117     {
 118       Grob *stem = (*i);
 119       Stencil flag = Stem::flag (stem);
 120       if (!flag.is_empty ())
 121         {
 122           Interval y = flag.extent (Y_AXIS)
 123             * (2 / ss)
 124             + Stem::stem_end_position (stem);
 125
 126           Interval x = stem->relative_coordinate (commonx, X_AXIS)
 127             + flag.extent (X_AXIS);
 128
 129           boxes.push_back (Box (x,y));
 130         }
 131     }
 132
 133   vector_sort (dots, position_less);
 134   for (vsize i = dots.size (); i--;)
 135     if (!dots[i]->is_live ())
 136       dots.erase (dots.begin () + i);
 137
 138   Dot_formatting_problem problem (boxes, base_x);
 139
 140   Dot_configuration cfg (problem);
 141   for (vsize i = 0; i < dots.size (); i++)
 142     {
 143       Dot_position dp;
 144       dp.dot_ = dots[i];
 145
 146       Grob *note = dots[i]->get_parent (Y_AXIS);
 147       if (note)
 148         {
 149           Grob *stem = unsmob_grob (note->get_object ("stem"));
 150           if (stem)
 151             dp.extremal_head_ = Stem::first_head (stem) == note;
 152
 153           dp.x_extent_ = note->extent (commonx, X_AXIS);
 154         }
 155
 156       int p = Staff_symbol_referencer::get_rounded_position (dp.dot_);
 157
 158       /* icky, since this should go via a Staff_symbol_referencer
 159          offset callback but adding a dot overwrites Y-offset. */
 160       p += (int) robust_scm2double (dp.dot_->get_property ("staff-position"), 0.0);
 161       dp.pos_ = p;
 162       if (dp.extremal_head_)
 163         dp.dir_ = to_dir (dp.dot_->get_property ("direction"));
 164
 165       cfg.remove_collision (p);
 166       cfg[p] = dp;
 167       if (Staff_symbol_referencer::on_line (dp.dot_, p))
 168         cfg.remove_collision (p);
 169     }
 170
 171   problem.register_configuration (cfg);
 172
 173   for (Dot_configuration::const_iterator i (cfg.begin ());
 174        i != cfg.end (); i++)
 175     {
 176       /*
 177         Junkme?
 178        */
 179       Staff_symbol_referencer::set_position (i->second.dot_, i->first);
 180     }
 181
 182   me->translate_axis (cfg.x_offset () - me->relative_coordinate (commonx, X_AXIS),
 183                       X_AXIS);
 184   return SCM_BOOL_T;
 185 }
 186
 187 void
 188 Dot_column::add_head (Grob *me, Grob *head)
 189 {
 190   Grob *d = unsmob_grob (head->get_object ("dot"));
 191   if (d)
 192     {
 193       Side_position_interface::add_support (me, head);
 194
 195       Pointer_group_interface::add_grob (me, ly_symbol2scm ("dots"), d);
 196       d->set_property ("Y-offset", Grob::x_parent_positioning_proc);
 197       // Dot formatting requests the Y-offset, -which- for rests may
 198       // trigger post-linebreak callbacks.
 199       if (!Rest::has_interface (head))
 200         d->set_property ("X-offset", Grob::x_parent_positioning_proc);
 201       Axis_group_interface::add_element (me, d);
 202     }
 203 }
 204
 205 ADD_INTERFACE (Dot_column,
 206                "Group dot objects so they form a column, and position"
 207                " dots so they do not clash with staff lines.",
 208
 209                /* properties */
 210                "dots "
 211                "positioning-done "
 212                "direction "
 213                );
 214