X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fseparation-item.cc;h=8a32363eb4d2b0d8c6df9c321f429cbee8886e8d;hb=543dc9db58da5e3acaf72dae2478933742fa6e90;hp=ac14f7cf85a6d83ef133d4407787590c0e7d7936;hpb=3f8a827aad721ed546b823e3f9f2605f61b90e20;p=lilypond.git

diff --git a/lily/separation-item.cc b/lily/separation-item.cc
index ac14f7cf85..8a32363eb4 100644
--- a/lily/separation-item.cc
+++ b/lily/separation-item.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1998--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1998--2012 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
@@ -80,8 +80,7 @@ Skyline
 Separation_item::conditional_skyline (Grob *me, Grob *left)
 {
   vector<Box> bs = boxes (me, left);
-  Real horizon_padding = robust_scm2double (me->get_property ("skyline-vertical-padding"), 0.0);
-  return Skyline (bs, horizon_padding, Y_AXIS, LEFT);
+  return Skyline (bs, Y_AXIS, LEFT);
 }
 
 MAKE_SCHEME_CALLBACK (Separation_item, calc_skylines, 1);
@@ -90,8 +89,19 @@ Separation_item::calc_skylines (SCM smob)
 {
   Item *me = unsmob_item (smob);
   vector<Box> bs = boxes (me, 0);
-  Real horizon_padding = robust_scm2double (me->get_property ("skyline-vertical-padding"), 0.0);
-  return Skyline_pair (bs, horizon_padding, Y_AXIS).smobbed_copy ();
+  Skyline_pair sp (bs, Y_AXIS);
+  /*
+    TODO: We need to decide if padding is 'intrinsic'
+    to a skyline or if it is something that is only added on in
+    distance calculations.  Here, we make it intrinsic, which copies
+    the behavior from the old code but no longer corresponds to how
+    vertical skylines are handled (where padding is not built into
+    the skyline).
+  */
+  Real vp = robust_scm2double (me->get_property ("skyline-vertical-padding"), 0.0);
+  sp[LEFT] = sp[LEFT].padded (vp);
+  sp[RIGHT] = sp[RIGHT].padded (vp);
+  return sp.smobbed_copy ();
 }
 
 /* if left is non-NULL, get the boxes corresponding to the
@@ -140,10 +150,19 @@ Separation_item::boxes (Grob *me, Grob *left)
       Interval extra_height = robust_scm2interval (elts[i]->get_property ("extra-spacing-height"),
                                                    Interval (0.0, 0.0));
 
-      x[LEFT] += extra_width[LEFT];
-      x[RIGHT] += extra_width[RIGHT];
-      y[DOWN] += extra_height[DOWN];
-      y[UP] += extra_height[UP];
+      // The conventional empty extent is (+inf.0 . -inf.0)
+      //  but (-inf.0 . +inf.0) is used as extra-spacing-height
+      //  on items that must not overlap other note-columns.
+      // If these two uses of inf combine, leave the empty extent.
+
+      if (!isinf (x[LEFT]))
+        x[LEFT] += extra_width[LEFT];
+      if (!isinf (x[RIGHT]))
+        x[RIGHT] += extra_width[RIGHT];
+      if (!isinf (y[DOWN]))
+        y[DOWN] += extra_height[DOWN];
+      if (!isinf (y[UP]))
+        y[UP] += extra_height[UP];
 
       if (!x.is_empty () && !y.is_empty ())
         out.push_back (Box (x, y));