Imported sources

[lilypond.git] / lily / separating-group-spanner.cc

diff --git a/lily/separating-group-spanner.cc b/lily/separating-group-spanner.cc
index cffc4ee2763b32aecedefc58c5ace8bc62abc8bc..868e49ecdd2cdb29a41c92a6b35ba8d2b36ce1f9 100644 (file)
--- a/lily/separating-group-spanner.cc
+++ b/lily/separating-group-spanner.cc
@@ -3,70 +3,115 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
 #include "separating-group-spanner.hh"
-#include "single-malt-grouping-item.hh"
-#include "p-col.hh"
+#include "separation-item.hh"
+#include "paper-column.hh"
 #include "paper-def.hh"
+#include "dimensions.hh"
+#include "group-interface.hh"
 
-Array<Rod>
-Separating_group_spanner::get_rods () const
+void
+Separating_group_spanner::find_rods (Item * r, SCM next, 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.
+  */
+  if (Separation_item::width (r).is_empty ())
+    return; 
+
+
+  for(; gh_pair_p (next); next = ly_cdr (next))
     {
-      a.push (Rod (spacing_unit_l_arr_[i], spacing_unit_l_arr_[i+1]));
-      bool lb =spacing_unit_l_arr_[i]->column_l ()->breakable_b_;
+      Item *l = dynamic_cast<Item*> (unsmob_grob (ly_car( next)));
+      Item *lb = l->find_prebroken_piece (RIGHT);
+
       if (lb)
        {
-         Rod r((Single_malt_grouping_item*)
-                      spacing_unit_l_arr_[i]->find_prebroken_piece (RIGHT),
-                      spacing_unit_l_arr_[i+1]);
-         r.distance_f_ += paper ()->interline_f () *1.5;
-         a.push (r);
-       }
-      bool rb=spacing_unit_l_arr_[i+1]->column_l ()->breakable_b_;
-      if (rb)
-       {
-         a.push (Rod (spacing_unit_l_arr_[i],
-                      (Single_malt_grouping_item*)
-                      spacing_unit_l_arr_[i+1]->find_prebroken_piece (LEFT)));
+         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.distance_ = li[RIGHT] - ri[LEFT] + padding;
+             rod.add_to_cols ();
+           }
        }
-      if (lb && rb)
+
+      Interval li (Separation_item::width (l));
+      Interval ri (Separation_item::conditional_width (r, l));
+      if (!li.is_empty () && !ri.is_empty ())
        {
-         Rod r((Single_malt_grouping_item*)
-                      spacing_unit_l_arr_[i]->find_prebroken_piece (RIGHT),
-                      (Single_malt_grouping_item*)
-                      spacing_unit_l_arr_[i+1]->find_prebroken_piece (LEFT));
-         r.distance_f_ += paper ()->interline_f () *1.5;
-         a.push (r);
+         Rod rod;
+
+         rod.item_l_drul_[LEFT] =l;
+         rod.item_l_drul_[RIGHT]=r;
+
+         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.
+      */
+
     }
-      
-  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);
+  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 (ly_cdr (s)); s = ly_cdr (s))
+    {
+      /*
+       Order of elements is reversed!
+       */
+      SCM elt = ly_car (s);
+      Item *r = unsmob_item (elt);
+
+      if (!r)
+       continue;
+
+      Item *rb
+       = dynamic_cast<Item*> (r->find_prebroken_piece (LEFT));
+      
+      find_rods (r, ly_cdr (s), padding);
+      if (rb)
+       find_rods (rb, ly_cdr (s), padding);
+    }
 
-IMPLEMENT_IS_TYPE_B1(Separating_group_spanner, Spanner);
+  return SCM_UNSPECIFIED ;
+}
 
 void
-Separating_group_spanner::do_substitute_dependency (Score_element*o, Score_element*n)
+Separating_group_spanner::add_spacing_unit (Grob* me ,Item*i)
 {
-  if (o->is_type_b (Single_malt_grouping_item::static_name ()))
-    {
-      Single_malt_grouping_item*ns = n ?
-       (Single_malt_grouping_item*)n->access_Item () : 0;
-      spacing_unit_l_arr_.substitute ((Single_malt_grouping_item*)o->access_Item (), ns);
-    }
+  Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), i);
+  me->add_dependency (i);
 }
 
+
+
+
+
+ADD_INTERFACE (Separating_group_spanner,"separation-spanner-interface",
+  "Spanner that containing @code{separation-item-interface} grobs to calculate rods",
+  "");