X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fscript-column.cc;h=b9c9e178f4bc65ddf3e28d3a9ceb76fd0d694bda;hb=98b690b03df23d45ae827340c00700be8814c156;hp=30e2b68f62bcf7f3a5d3c34239f7b4726c32eb4c;hpb=b7a0cffbf9d1069860368f289a5b50e9d1d90ba8;p=lilypond.git

diff --git a/lily/script-column.cc b/lily/script-column.cc
index 30e2b68f62..b9c9e178f4 100644
--- a/lily/script-column.cc
+++ b/lily/script-column.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1999--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1999--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -116,7 +116,7 @@ Script_column::before_line_breaking (SCM smob)
 	  Side_position_interface::x_aligned_side_proc)
 	staff_sided.push_back (sc);
     }
-  
+
   order_grobs (staff_sided);
   return SCM_UNSPECIFIED;
 }
@@ -139,26 +139,39 @@ Script_column::order_grobs (vector<Grob*> grobs)
       SCM ss = scm_reverse_x (scripts_drul[d], SCM_EOL);
       ss = scm_stable_sort_x (ss, ly_grob_script_priority_less_proc);
 
-      Grob *last = 0;
-      for (SCM s = ss; scm_is_pair (s); s = scm_cdr (s))
+      Grob *g = 0;  // current grob in list
+      Grob *last = 0; // previous grob in list
+      SCM initial_outside_staff = SCM_EOL;  // initial outside_staff_priority of current grob
+      SCM last_initial_outside_staff = SCM_EOL;  // initial outside_staff_priority of previous grob
+
+      //  loop over all grobs in script column (already sorted by script_priority)
+      for (SCM s = ss; scm_is_pair (s);
+           s = scm_cdr (s), last = g, last_initial_outside_staff = initial_outside_staff)
 	{
-	  Grob *g = unsmob_grob (scm_car (s));
-	  if (last)
-	    {
-	      SCM outside_staff = last->get_property ("outside-staff-priority");
-	      if (scm_is_number (outside_staff))
-		{
-		  /* we allow the outside-staff-priority ordering to override the
-		     script-priority ordering */
-		  if (!scm_is_number (g->get_property ("outside-staff-priority")))
-		    g->set_property ("outside-staff-priority",
-				     scm_from_double (scm_to_double (outside_staff) + 0.1));
-		}
-	      else
+	  g = unsmob_grob (scm_car (s));
+          initial_outside_staff = g->get_property ("outside-staff-priority");
+          if (last)    //not the first grob in the list
+            {
+	      SCM last_outside_staff = last->get_property ("outside-staff-priority");
+              /*
+                if outside_staff_priority is missing for previous grob, just
+                use it as a support for the current grob
+              */
+	      if (!scm_is_number (last_outside_staff))
 		Side_position_interface::add_support (g, last);
+              /*
+                if outside_staff_priority is missing or is equal to original
+                outside_staff_priority of previous grob, set new
+                outside_staff_priority to just higher than outside_staff_priority
+                of previous grob in order to preserve ordering.
+              */
+              else if ((!scm_is_number (initial_outside_staff)) ||
+                       (fabs (scm_to_double (initial_outside_staff) -
+                             robust_scm2double (last_initial_outside_staff, 0)) < 0.001))
+                g->set_property ("outside-staff-priority",
+				     scm_from_double (
+                                       scm_to_double (last_outside_staff) + 0.1));
 	    }
-
-	  last = g;
 	}
     }
   while (flip (&d) != DOWN);
@@ -166,8 +179,8 @@ Script_column::order_grobs (vector<Grob*> grobs)
 
 ADD_INTERFACE (Script_column,
 	       "An interface that sorts scripts according to their"
-	       " @code{script-priority}.",
-	       
+	       " @code{script-priority} and @code{outside-staff-priority}.",
+
 	       /* properties */
 	       ""
 	       );