-/*
- separating-group-spanner.cc -- implement Separating_group_spanner
-
+/*
+ separating-group-spanner.cc -- implement Separating_group_spanner
+
source file of the GNU LilyPond music typesetter
-
- (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1998--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#include "separating-group-spanner.hh"
-#include "single-malt-grouping-item.hh"
-#include "p-col.hh"
-#include "paper-def.hh"
-Array<Rod>
-Separating_group_spanner::get_rods () const
+#include "separation-item.hh"
+#include "paper-column.hh"
+#include "output-def.hh"
+#include "dimensions.hh"
+#include "pointer-group-interface.hh"
+
+void
+Separating_group_spanner::find_rods (Item *r,
+ vector<Grob*> const &separators,
+ vsize idx,
+ Real padding)
{
- Array<Rod> a;
-
- for (int i=0; i < spacing_unit_l_arr_.size () -1; i++)
+
+ /*
+ 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.
+ */
+ for (; idx != VPOS; idx--)
{
- Single_malt_grouping_item *l =spacing_unit_l_arr_[i];
- Single_malt_grouping_item *lb
- = dynamic_cast<Single_malt_grouping_item*>(l->find_prebroken_piece (RIGHT));
- Single_malt_grouping_item *r = spacing_unit_l_arr_[i+1];
- Single_malt_grouping_item *rb
- = dynamic_cast<Single_malt_grouping_item*>(r->find_prebroken_piece (LEFT));
-
- a.push (Rod (spacing_unit_l_arr_[i], spacing_unit_l_arr_[i+1]));
+ Item *l = dynamic_cast<Item *> (separators[idx]);
+ Item *lb = l->find_prebroken_piece (RIGHT);
+
if (lb)
{
- Rod rod(lb, r);
- rod.distance_f_ += paper ()->interline_f () *1.5;
- a.push (rod);
- }
-
- if (rb)
- {
- a.push (Rod (l, rb));
- }
- if (lb && rb)
- {
- Rod rod(lb, rb);
- rod.distance_f_ += paper ()->interline_f () *1.5;
- a.push (rod);
+ Separation_item::set_distance (Drul_array<Item*> (lb, r), padding);
}
+
+ if (Separation_item::set_distance (Drul_array<Item *> (l, r), padding))
+ break;
+
+ /*
+ this grob doesn't cause a constraint. We look further until we
+ find one that does.
+ */
}
-
- return a;
}
-void
-Separating_group_spanner::add_spacing_unit (Single_malt_grouping_item*i)
+MAKE_SCHEME_CALLBACK (Separating_group_spanner, set_spacing_rods, 1);
+SCM
+Separating_group_spanner::set_spacing_rods (SCM smob)
{
- spacing_unit_l_arr_.push (i);
- add_dependency (i);
-}
+ Grob *me = unsmob_grob (smob);
-void
-Separating_group_spanner::do_substitute_element_pointer (Score_element*o, Score_element*n)
-{
- if (dynamic_cast<Single_malt_grouping_item *> (o))
+ /*
+ Ugh: padding is added doubly, also for SeparationItem
+ */
+ Real padding = robust_scm2double (me->get_property ("padding"), 0.1);
+
+ extract_grob_set (me, "elements", elts);
+ for (vsize i = elts.size (); i-- > 1;)
{
- Single_malt_grouping_item*ns = dynamic_cast<Single_malt_grouping_item *> (n);
- spacing_unit_l_arr_.substitute (dynamic_cast<Single_malt_grouping_item *> (o), ns);
+ Item *r = dynamic_cast<Item *> (elts[i]);
+ if (!r)
+ continue;
+
+ if (Separation_item::width (r).is_empty ())
+ continue;
+
+ Item *rb
+ = dynamic_cast<Item *> (r->find_prebroken_piece (LEFT));
+
+ find_rods (r, elts, i - 1, padding);
+ if (rb)
+ find_rods (rb, elts, i - 1, padding);
}
+
+ return SCM_UNSPECIFIED;
}
-Separating_group_spanner::Separating_group_spanner()
+void
+Separating_group_spanner::add_spacing_unit (Grob *me, Item *i)
{
- break_helper_only_b_ = true;
+ Pointer_group_interface::add_unordered_grob (me, ly_symbol2scm ("elements"), i);
}
+
+ADD_INTERFACE (Separating_group_spanner,
+ "A spanner that calculates spacing constraints (\"rods\") "
+ "using the @code{separation-item-interface} grobs in @code{elements}.",
+
+ /* properties */
+ "elements "
+ "padding ");