- { /*
- Trigger note collision resolution first, since that may kill off
- dots when merging.
- */
- Grob *c = 0;
- for (vsize i = dots.size (); i--;)
- {
- Grob *n = dots[i]->get_parent (Y_AXIS);
- if (c)
- c = n->common_refpoint (c, X_AXIS);
- else
- c = n;
- }
- for (vsize i = dots.size (); i--;)
- {
- Grob *n = dots[i]->get_parent (Y_AXIS);
- n->relative_coordinate (c, X_AXIS);
- }
- }
-
+ vector<Grob*> main_heads;
+ Real ss = 0;
+
+ Grob *commonx = me;
+ for (vsize i = 0; i < dots.size (); i++)
+ {
+ Grob *n = dots[i]->get_parent (Y_AXIS);
+ commonx = n->common_refpoint (commonx, X_AXIS);
+
+ if (Grob *stem = unsmob_grob (n->get_object("stem")))
+ {
+ commonx = stem->common_refpoint (commonx, X_AXIS);
+
+ if (Stem::first_head (stem) == n)
+ main_heads.push_back (n);
+ }
+ }
+
+ vector<Box> boxes;
+ set<Grob*> stems;
+
+ extract_grob_set(me, "side-support-elements", support);
+
+ Interval base_x;
+ for (vsize i = 0; i < main_heads.size (); i++)
+ base_x.unite (main_heads[i]->extent (commonx, X_AXIS));
+
+ for (vsize i = 0; i < support.size (); i++)
+ {
+ Grob *s = support[i];
+ if (!ss)
+ ss = Staff_symbol_referencer::staff_space (s);
+
+ /* can't inspect Y extent of rest.
+
+ Rest collisions should wait after line breaking.
+ */
+ Interval y;
+ if (Rest::has_interface (s))
+ {
+ base_x.unite (s->extent (commonx, X_AXIS));
+ continue;
+ }
+ else if (Stem::has_interface (s))
+ {
+ Real y1 = Stem::head_positions (s)[-get_grob_direction (s)];
+ Real y2 = y1 + get_grob_direction (s) * 7;
+
+ y.add_point (y1);
+ y.add_point (y2);
+ }
+ else
+ y = s->extent (s, Y_AXIS);
+
+ y *= 2 / ss;
+ y += Staff_symbol_referencer::get_position (s);
+
+ Box b (s->extent (commonx, X_AXIS), y);
+ boxes.push_back (b);
+
+ if (Grob *stem = unsmob_grob (s->get_object ("stem")))
+ stems.insert (stem);
+ }
+
+ for (set<Grob*>::const_iterator i(stems.begin());
+ i != stems.end (); i++)
+ {
+ Grob *stem = (*i);
+ Stencil flag = Stem::flag (stem);
+ if (!flag.is_empty ())
+ {
+ Interval y = flag.extent (Y_AXIS)
+ * (2 / ss)
+ + Stem::stem_end_position (stem);
+
+ Interval x = stem->relative_coordinate (commonx, X_AXIS)
+ + flag.extent (X_AXIS);
+
+ boxes.push_back (Box (x,y));
+ }
+ }
+