source file of the GNU LilyPond music typesetter
- (c) 1998--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "dimensions.hh"
#include "group-interface.hh"
-static void
-do_rod (Item *l, Item *r)
+void
+Separating_group_spanner::find_rods (Item * r, SCM next, Real padding)
{
- Rod rod;
- Interval li (Separation_item::my_width (l));
- Interval ri (Separation_item::my_width (r));
+ /*
+ This is an inner loop: look for the first normal (unbroken) Left
+ grob. This looks like an inner loop (ie. quadratic total), but in
+ most cases, the interesting L will just be the first entry of
+ NEXT, making it linear in most of the cases.
+ */
+ if (Separation_item::width (r).is_empty ())
+ return;
+
+
+ for(; gh_pair_p (next); next = ly_cdr (next))
+ {
+ Item *l = dynamic_cast<Item*> (unsmob_grob (ly_car( next)));
+ Item *lb = l->find_prebroken_piece (RIGHT);
+
+ if (lb)
+ {
+ Interval li (Separation_item::width (lb));
+ Interval ri (Separation_item::conditional_width (r, lb));
+ if (!li.is_empty () && !ri.is_empty ())
+ {
+ Rod rod;
+
+ rod.item_l_drul_[LEFT] = lb;
+ rod.item_l_drul_[RIGHT] = r;
- rod.item_l_drul_[LEFT] =l;
- rod.item_l_drul_[RIGHT]=r;
+ rod.distance_ = li[RIGHT] - ri[LEFT] + padding;
+ rod.add_to_cols ();
+ }
+ }
+
+ Interval li (Separation_item::width (l));
+ Interval ri (Separation_item::conditional_width (r, l));
+ if (!li.is_empty () && !ri.is_empty ())
+ {
+ Rod rod;
- if (li.empty_b () || ri.empty_b ())
- rod.distance_f_ = 0;
- else
- rod.distance_f_ = li[RIGHT] - ri[LEFT];
+ rod.item_l_drul_[LEFT] =l;
+ rod.item_l_drul_[RIGHT]=r;
- rod.columnize ();
- rod.add_to_cols ();
+ rod.distance_ = li[RIGHT] - ri[LEFT] + padding;
+
+ rod.add_to_cols ();
+ break;
+ }
+
+ /*
+ this grob doesn't cause a constraint. We look further until we
+ find one that does.
+ */
+
+ }
}
-
+
+MAKE_SCHEME_CALLBACK (Separating_group_spanner,set_spacing_rods_and_seqs,1);
+SCM
+Separating_group_spanner::set_spacing_rods_and_seqs (SCM smob)
+{
+ set_spacing_rods (smob);
+
+ return SCM_UNSPECIFIED;
+}
+
MAKE_SCHEME_CALLBACK (Separating_group_spanner,set_spacing_rods,1);
SCM
Separating_group_spanner::set_spacing_rods (SCM smob)
{
Grob*me = unsmob_grob (smob);
+ Real padding = robust_scm2double (me->get_grob_property ("padding"), 0.1);
- for (SCM s = me->get_grob_property ("elements"); gh_pair_p (s) && gh_pair_p (gh_cdr (s)); s = gh_cdr (s))
+ for (SCM s = me->get_grob_property ("elements"); gh_pair_p (s) && gh_pair_p (ly_cdr (s)); s = ly_cdr (s))
{
/*
Order of elements is reversed!
*/
- SCM elt = gh_cadr (s);
- SCM next_elt = gh_car (s);
-
- Item *l = dynamic_cast<Item*> (unsmob_grob (elt));
- Item *r = dynamic_cast<Item*> (unsmob_grob (next_elt));
+ SCM elt = ly_car (s);
+ Item *r = unsmob_item (elt);
- if (!r || !l)
+ if (!r)
continue;
-
- Item *lb
- = dynamic_cast<Item*> (l->find_prebroken_piece (RIGHT));
Item *rb
= dynamic_cast<Item*> (r->find_prebroken_piece (LEFT));
- do_rod (l, r);
- if (lb)
- {
- do_rod (lb, r);
- }
-
+ find_rods (r, ly_cdr (s), padding);
if (rb)
- {
- do_rod (l, rb);
- }
-
- if (lb && rb)
- {
- do_rod (lb, rb);
-
- }
+ find_rods (rb, ly_cdr (s), padding);
}
- /*
- We've done our job, so we get lost.
- */
- for (SCM s = me->get_grob_property ("elements"); gh_pair_p (s); s = gh_cdr (s))
- {
- Item * it =dynamic_cast<Item*> (unsmob_grob (gh_car (s)));
- if (it && it->broken_b ())
- {
- it->find_prebroken_piece (LEFT) ->suicide ();
- it->find_prebroken_piece (RIGHT)->suicide ();
- }
- it->suicide ();
- }
- me->suicide ();
return SCM_UNSPECIFIED ;
}
void
Separating_group_spanner::add_spacing_unit (Grob* me ,Item*i)
{
- Pointer_group_interface::add_element (me, "elements",i);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), i);
me->add_dependency (i);
}
-void
-Separating_group_spanner::set_interface (Grob*)
-{
-}
+
+
+ADD_INTERFACE (Separating_group_spanner,"separation-spanner-interface",
+ "Spanner that containing @code{separation-item-interface} grobs to calculate rods",
+ "");