X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fseparation-item.cc;h=34f3855ebc3d0e16433570f1e8e0b290ac1b64fb;hb=557c7f26f0c62bca9eb620a782e6a8e5bef9103e;hp=f85866f4c8320d503dcec25bc210fc97af2b9024;hpb=ce62ceaa3f635693b541a97de1eced86fab4c0f7;p=lilypond.git

diff --git a/lily/separation-item.cc b/lily/separation-item.cc
index f85866f4c8..34f3855ebc 100644
--- a/lily/separation-item.cc
+++ b/lily/separation-item.cc
@@ -3,7 +3,7 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1998--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
@@ -27,13 +27,17 @@ Separation_item::add_conditional_item (Grob* me , Grob *e)
   Pointer_group_interface::add_grob (me, ly_symbol2scm ("conditional-elements"), e);
 }
 
+/*
+  Return the width of ME given that we are considering the object on
+  the LEFT.
+ */
 Interval
 Separation_item::conditional_width (Grob * me, Grob * left)
 {
   Interval w = width (me);
-
+  
   Item *item = dynamic_cast<Item*> (me);
-  Paper_column * pc = item->column_l ();
+  Paper_column * pc = item->get_column ();
   
   
   for (SCM s =  me->get_grob_property ("conditional-elements"); gh_pair_p (s); s = ly_cdr (s))
@@ -43,7 +47,7 @@ Separation_item::conditional_width (Grob * me, Grob * left)
 	continue;
       
       Item *il = unsmob_item (elt);
-      if (pc != il->column_l ())
+      if (pc != il->get_column ())
 	{
 	  /* this shouldn't happen, but let's continue anyway. */
 	  programming_error (_ ("Separation_item:  I've been drinking too much"));
@@ -63,25 +67,21 @@ Separation_item::conditional_width (Grob * me, Grob * left)
 
   SCM pad = me->get_grob_property ("padding");
 
-  if (gh_number_p (pad))
-    {
-      w[RIGHT] += gh_scm2double (pad)/2;
-      w[LEFT] -= gh_scm2double (pad)/2;    
-    }
+  w.widen (robust_scm2double (pad, 0.0));
   return w;
 }
 
 Interval
 Separation_item::width (Grob *me)
 {
-  SCM sw = me->get_grob_property ("extent-X");
-  if (ly_number_pair_p (sw))
+  SCM sw = me->get_grob_property ("X-extent");
+  if (is_number_pair (sw))
     {
       return ly_scm2interval (sw);
     }
 
   Item *item = dynamic_cast<Item*> (me);
-  Paper_column * pc = item->column_l ();
+  Paper_column * pc = item->get_column ();
   Interval w;
   
   for (SCM s =  me->get_grob_property ("elements"); gh_pair_p (s); s = ly_cdr (s))
@@ -91,7 +91,7 @@ Separation_item::width (Grob *me)
 	continue;
 
       Item *il = unsmob_item (elt);
-      if (pc != il->column_l ())
+      if (pc != il->get_column ())
 	{
 	  /* this shouldn't happen, but let's continue anyway. */
 	  programming_error (_ ("Separation_item:  I've been drinking too much"));
@@ -104,7 +104,7 @@ Separation_item::width (Grob *me)
 	}
 
       Interval iv (il->extent (pc, X_AXIS));
-      if (!iv.empty_b ())
+      if (!iv.is_empty ())
 	{
 	  w.unite (iv);
 	}
@@ -112,18 +112,54 @@ Separation_item::width (Grob *me)
 
   SCM pad = me->get_grob_property ("padding");
 
-  if (gh_number_p (pad))
-  {
-    w[RIGHT] += gh_scm2double (pad)/2;
-    w[LEFT] -= gh_scm2double (pad)/2;    
-  }
-
+  w.widen (robust_scm2double (pad, 0.0));
 
-  me->set_grob_property ("extent-X", ly_interval2scm (w));
-  
+  me->set_grob_property ("X-extent", ly_interval2scm (w));
   
   return w;
- // add this->offset_ ? this-> relative_coordinate ()? 
+}
+
+Interval
+Separation_item::relative_width (Grob * me, Grob * common)
+{
+  Interval iv = width (me);
+
+  return dynamic_cast<Item*>(me)->get_column ()->relative_coordinate (common, X_AXIS) + iv ;
+}
+
+
+/*
+  Try to find the break-aligned symbol in SEPARATION_ITEM that is
+  sticking out at direction D. The x size is put in LAST_EXT
+*/
+Grob*
+Separation_item::extremal_break_aligned_grob (Grob *separation_item, Direction d,
+					    Interval * last_ext)
+{
+  Grob *col = dynamic_cast<Item*> (separation_item)->get_column ();
+  last_ext->set_empty ();
+  Grob *last_grob = 0;
+  for (SCM s = separation_item->get_grob_property ("elements");
+       gh_pair_p (s); s = gh_cdr (s))
+    {
+      Grob * break_item = unsmob_grob (gh_car (s));
+      
+      if (!gh_symbol_p (break_item->get_grob_property ("break-align-symbol")))
+	continue;
+
+      Interval ext = break_item->extent (col, X_AXIS);
+
+      if (ext.is_empty ())
+	continue;
+      if (!last_grob
+	  || (last_grob && d * (ext[d]- (*last_ext)[d]) > 0) )
+	{
+	  *last_ext = ext;
+	  last_grob = break_item; 
+	}
+    }
+
+  return last_grob;  
 }
 
 
@@ -131,10 +167,9 @@ Separation_item::width (Grob *me)
 
 
 ADD_INTERFACE (Separation_item,"separation-item-interface",
-  "Item that computes widths to generate spacing rods.
+	       "Item that computes widths to generate spacing rods. "
+	       "This is done in concert with @ref{separation-spanner-interface}."
+	       
+	       ,
 
-Calc dimensions for the Separating_group_spanner; this has to be
-an item to get dependencies correct.  It can't be an grob_group
-since these usually are in a different X_group
-",
-  "extent-X conditional-elements elements");
+	       "padding X-extent conditional-elements elements");