X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fspaceable-grob.cc;h=96313acf4abd4629f8806a6d87f9ee9f9a94e553;hb=4b5d14fc3b5ea19d4cf71d2222ddb3964122eeb2;hp=26bf4e8066b9165b7c54c81f05605dd298bd0141;hpb=20091095d3ac112fa0d0c55c8e2b8092584be4b2;p=lilypond.git

diff --git a/lily/spaceable-grob.cc b/lily/spaceable-grob.cc
index 26bf4e8066..96313acf4a 100644
--- a/lily/spaceable-grob.cc
+++ b/lily/spaceable-grob.cc
@@ -1,78 +1,133 @@
-/*   
-  spaceable-grob.cc --  implement Spaceable_grob
-  
+/*
+  spaceable-grob.cc -- implement Spaceable_grob
+
   source file of the GNU LilyPond music typesetter
-  
-  (c) 2000--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
+
+  (c) 2000--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
 
 #include "spaceable-grob.hh"
-#include "grob.hh"
+
+#include <cstdio>
+
 #include "warn.hh"
+#include "spring.hh"
+#include "pointer-group-interface.hh"
+#include "grob.hh"
+#include "paper-column.hh"
 
 SCM
-Spaceable_grob::get_minimum_distances (Grob*me)
+Spaceable_grob::get_minimum_distances (Grob *me)
 {
-  return me->get_grob_property ("minimum-distances");
+  return me->get_object ("minimum-distances");
 }
 
 /*todo: merge code of spring & rod?
  */
 void
-Spaceable_grob::add_rod (Grob *me , Grob * p, Real d)
+Spaceable_grob::add_rod (Grob *me, Grob *p, Real d)
 {
+  //  printf ("rod %lf\n", d);
+  if (d < 0)
+    return;
+
+  if (isinf (d))
+    programming_error ("infinite rod");
+
   SCM mins = get_minimum_distances (me);
-  SCM newdist = gh_double2scm (d);
-  for (SCM s = mins; gh_pair_p (s); s = gh_cdr (s))
+  SCM newdist = scm_from_double (d);
+  for (SCM s = mins; scm_is_pair (s); s = scm_cdr (s))
     {
-      SCM dist = gh_car (s);
-      if (gh_car (dist) == p->self_scm ())
+      SCM dist = scm_car (s);
+      if (scm_car (dist) == p->self_scm ())
 	{
-	  gh_set_cdr_x (dist, scm_max (gh_cdr (dist),
-				       newdist));
-	  return ;
+	  scm_set_cdr_x (dist, scm_max (scm_cdr (dist),
+					newdist));
+	  return;
 	}
     }
 
-  mins = gh_cons (gh_cons (p->self_scm (), newdist), mins);
-  me->set_grob_property ("minimum-distances", mins);
+  if (Paper_column::get_rank (p) < Paper_column::get_rank (me))
+    programming_error ("Adding reverse rod");
+
+  mins = scm_cons (scm_cons (p->self_scm (), newdist), mins);
+  me->set_object ("minimum-distances", mins);
 }
 
 void
-Spaceable_grob::add_spring (Grob*me, Grob * p, Real d, Real strength)
+Spaceable_grob::add_spring (Grob *me, Grob *other,
+			    Real distance, Real inverse_strength)
 {
-  SCM mins = me->get_grob_property ("ideal-distances");
-  
-  
-  SCM newdist= gh_double2scm (d);
-  for (SCM s = mins; gh_pair_p (s); s = gh_cdr (s))
+  if (distance <= 0.0 || inverse_strength < 0.0)
+    {
+      programming_error ("adding reverse spring, setting to unit");
+      distance = 1.0;
+      inverse_strength = 1.0;
+    }
+
+  if (isinf (distance) || isnan (distance)
+      || isnan (inverse_strength))
     {
-      SCM dist = gh_car (s);
-      if (gh_car (dist) == p->self_scm ())
+      /* strength == INF is possible. It means fixed distance.  */
+      programming_error ("insane distance found");
+      distance = 1.0;
+      inverse_strength = 1.0;
+    }
+
+#ifndef NDEBUG
+  SCM mins = me->get_object ("ideal-distances");
+  for (SCM s = mins; scm_is_pair (s); s = scm_cdr (s))
+    {
+      Spring_smob *sp = unsmob_spring (scm_car (s));
+      if (sp->other_ == other)
 	{
 	  programming_error ("already have that spring");
-	  return ;
+	  return;
 	}
     }
-  SCM newstrength= gh_double2scm (strength);  
-  
-  mins = gh_cons (gh_cons (p->self_scm (), gh_cons (newdist, newstrength)), mins);
-  me->set_grob_property ("ideal-distances", mins);
-}
+#endif
 
+  Spring_smob spring;
+  spring.inverse_strength_ = inverse_strength;
+  spring.distance_ = distance;
+  spring.other_ = other;
+
+  SCM ideal = me->get_object ("ideal-distances");
+  ideal = scm_cons (spring.smobbed_copy (), ideal);
+  me->set_object ("ideal-distances", ideal);
+}
 
 void
-Spaceable_grob::remove_interface (Grob*me)
+Spaceable_grob::get_spring (Grob *me, Grob *other, Real *dist, Real *inv_strength)
 {
-  me->remove_grob_property ("minimum-distances");
-  me->remove_grob_property ("ideal-distances");
-  me->remove_grob_property ("dir-list");
+  for (SCM s = me->get_object ("ideal-distances");
+       scm_is_pair (s); s = scm_cdr (s))
+    {
+      Spring_smob *spring = unsmob_spring (scm_car (s));
+      if (spring && spring->other_ == other)
+	{
+	  *dist = spring->distance_;
+	  *inv_strength = spring->inverse_strength_;
+	}
+    }
 }
 
-
 void
-Spaceable_grob::set_interface (Grob*me)
+Spaceable_grob::remove_interface (Grob *me)
 {
-  me->set_interface (ly_symbol2scm ("spaceable-grob-interface"));
+  me->set_object ("minimum-distances", SCM_EOL);
+  me->set_object ("spacing-wishes", SCM_EOL);
+  me->set_object ("ideal-distances", SCM_EOL);
 }
+
+ADD_INTERFACE (Spaceable_grob, "spaceable-grob-interface",
+	       "A layout object that takes part in the spacing problem. ",
+	       /* properties */
+	       "ideal-distances "
+	       "keep-inside-line "
+	       "left-neighbors "
+	       "measure-length "
+	       "minimum-distances "
+	       "right-neighbors "
+	       "spacing-wishes");
+