* The grand 2005-2006 replace.

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

diff --git a/lily/separating-group-spanner.cc b/lily/separating-group-spanner.cc
index e9b27a1eb06ee70100edae28278cb50b09edca92..cdf126d3dcffb9901555a1b65345a760d5c0c11d 100644 (file)
--- a/lily/separating-group-spanner.cc
+++ b/lily/separating-group-spanner.cc
@@ -1,21 +1,24 @@
-/*   
-  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--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
+
+  (c) 1998--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
 
 #include "separating-group-spanner.hh"
+
 #include "separation-item.hh"
 #include "paper-column.hh"
-#include "paper-def.hh"
+#include "output-def.hh"
 #include "dimensions.hh"
-#include "group-interface.hh"
+#include "pointer-group-interface.hh"
 
 void
-Separating_group_spanner::find_rods (Item * r, SCM next, Real padding)
+Separating_group_spanner::find_rods (Item *r,
+                                    Link_array<Grob> const &separators,
+                                    int idx,
+                                    Real padding)
 {
 
   /*
@@ -24,13 +27,9 @@ Separating_group_spanner::find_rods (Item * r, SCM next, Real padding)
     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 (; ly_pair_p (next); next = ly_cdr (next))
+  for (; idx >= 0; idx--)
     {
-      Item *l = dynamic_cast<Item*> (unsmob_grob (ly_car ( next)));
+      Item *l = dynamic_cast<Item *> (separators[idx]);
       Item *lb = l->find_prebroken_piece (RIGHT);
 
       if (lb)
@@ -41,8 +40,8 @@ Separating_group_spanner::find_rods (Item * r, SCM next, Real padding)
            {
              Rod rod;
 
-             rod.item_l_drul_[LEFT] = lb;
-             rod.item_l_drul_[RIGHT] = r;
+             rod.item_drul_[LEFT] = lb;
+             rod.item_drul_[RIGHT] = r;
 
              rod.distance_ = li[RIGHT] - ri[LEFT] + padding;
              rod.add_to_cols ();
@@ -55,12 +54,13 @@ 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;
+         rod.item_drul_[LEFT] = l;
+         rod.item_drul_[RIGHT] = r;
 
          rod.distance_ = li[RIGHT] - ri[LEFT] + padding;
-       
-         rod.add_to_cols ();
+
+         if (rod.distance_ > 0.0)
+           rod.add_to_cols ();
          break;
        }
 
@@ -68,55 +68,52 @@ Separating_group_spanner::find_rods (Item * r, SCM next, Real padding)
        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,1);
+MAKE_SCHEME_CALLBACK (Separating_group_spanner, set_spacing_rods, 1);
 SCM
 Separating_group_spanner::set_spacing_rods (SCM smob)
 {
-  Grob*me = unsmob_grob (smob);
+  Grob *me = unsmob_grob (smob);
 
   /*
     Ugh: padding is added doubly, also for SeparationItem
-   */
+  */
   Real padding = robust_scm2double (me->get_property ("padding"), 0.1);
-  
-  for (SCM s = me->get_property ("elements"); ly_pair_p (s) && ly_pair_p (ly_cdr (s)); s = ly_cdr (s))
-    {
-      /*
-       Order of elements is reversed!
-       */
-      SCM elt = ly_car (s);
-      Item *r = unsmob_item (elt);
 
+  extract_grob_set (me, "elements", elts);
+  for (int i = elts.size ();
+       i-- > 1;)
+    {
+      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, ly_cdr (s), padding);
+       = dynamic_cast<Item *> (r->find_prebroken_piece (LEFT));
+
+      find_rods (r, elts, i - 1, padding);
       if (rb)
-       find_rods (rb, ly_cdr (s), padding);
+       find_rods (rb, elts, i - 1, padding);
     }
 
-  return SCM_UNSPECIFIED ;
+  return SCM_UNSPECIFIED;
 }
 
 void
-Separating_group_spanner::add_spacing_unit (Grob* me ,Item*i)
+Separating_group_spanner::add_spacing_unit (Grob *me, Item *i)
 {
   Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), i);
-  me->add_dependency (i);
 }
 
-
-
-
-
-ADD_INTERFACE (Separating_group_spanner,"separation-spanner-interface",
+ADD_INTERFACE (Separating_group_spanner, "separation-spanner-interface",
               "A spanner that calculates spacing constraints (\"rods\") "
               "using the @code{separation-item-interface} grobs in @code{elements}.",
-              "elements padding");
+
+              /* properties */
+              "elements "
+              "padding");