Imported sources

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

diff --git a/lily/separating-group-spanner.cc b/lily/separating-group-spanner.cc
index cc4fd64d35b5a3800f99fe8d61cf7ad5631d53d6..868e49ecdd2cdb29a41c92a6b35ba8d2b36ce1f9 100644 (file)
--- a/lily/separating-group-spanner.cc
+++ b/lily/separating-group-spanner.cc
@@ -3,93 +3,115 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1998--1999 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 "separation-item.hh"
 #include "paper-column.hh"
 #include "paper-def.hh"
 #include "dimensions.hh"
+#include "group-interface.hh"
 
-static Rod
-make_rod (Single_malt_grouping_item *l, Single_malt_grouping_item *r)
+void
+Separating_group_spanner::find_rods (Item * r, SCM next, Real padding)
 {
-  Rod rod;
-  rod.item_l_drul_[LEFT] =l;
-  rod.item_l_drul_[RIGHT]=r;
 
-  Interval li (l->my_width ());
-  Interval ri (r->my_width ());
-  
-  if (li.empty_b () || ri.empty_b ())
-    rod.distance_f_ = 0;
-  else
-    rod.distance_f_ = li[RIGHT] - ri[LEFT];
+  /*
+    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);
 
-  return rod;
+      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.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;
+
+         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.
+      */
+
+    }
 }
-  
 
-Array<Rod>
-Separating_group_spanner::get_rods () const
+MAKE_SCHEME_CALLBACK (Separating_group_spanner,set_spacing_rods,1);
+SCM
+Separating_group_spanner::set_spacing_rods (SCM smob)
 {
-  Array<Rod> a;
+  Grob*me = unsmob_grob (smob);
+  Real padding = robust_scm2double (me->get_grob_property ("padding"), 0.1);
   
-  for (SCM s = get_elt_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);
-
-      Single_malt_grouping_item *l = dynamic_cast<Single_malt_grouping_item*> (unsmob_element (elt));
-      Single_malt_grouping_item *r = dynamic_cast<Single_malt_grouping_item*> (unsmob_element ( next_elt));
+      SCM elt = ly_car (s);
+      Item *r = unsmob_item (elt);
 
-      if (!r || !l)
+      if (!r)
        continue;
-      
-      Single_malt_grouping_item *lb
-       = dynamic_cast<Single_malt_grouping_item*>(l->find_broken_piece (RIGHT));
 
-      Single_malt_grouping_item *rb
-       = dynamic_cast<Single_malt_grouping_item*>(r->find_broken_piece (LEFT));
-      
-      a.push (make_rod(l,  r));
-      if (lb)
-       {
-         Rod rod(make_rod (lb, r));
-         a.push (rod);
-       }
+      Item *rb
+       = dynamic_cast<Item*> (r->find_prebroken_piece (LEFT));
       
+      find_rods (r, ly_cdr (s), padding);
       if (rb)
-       {
-         a.push (make_rod (l, rb));
-       }
-      
-      if (lb && rb)
-       {
-         Rod rod(make_rod (lb, rb));
-         a.push (rod);
-       }
+       find_rods (rb, ly_cdr (s), padding);
     }
-      
-  return a;
+
+  return SCM_UNSPECIFIED ;
 }
 
 void
-Separating_group_spanner::add_spacing_unit (Single_malt_grouping_item*i)
+Separating_group_spanner::add_spacing_unit (Grob* me ,Item*i)
 {
-  set_elt_property ("elements",
-                   gh_cons (i->self_scm_,
-                            get_elt_property ("elements")));
-  add_dependency (i);
+  Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), i);
+  me->add_dependency (i);
 }
 
 
-Separating_group_spanner::Separating_group_spanner ()
-{
-  set_elt_property ("elements", SCM_EOL);
-}
+
+
+
+ADD_INTERFACE (Separating_group_spanner,"separation-spanner-interface",
+  "Spanner that containing @code{separation-item-interface} grobs to calculate rods",
+  "");