X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Frest-collision.cc;h=6448492b8f5f925b954fe9fb4064b4b0cb50cb2a;hb=1524f5e5c4fd50c539d3568c4557e3041e9880c6;hp=063b773a92ae2f3ccf58792ba566095bf884b0a2;hpb=d2300573cae3c1920400d040faddd33f17b43c2d;p=lilypond.git

diff --git a/lily/rest-collision.cc b/lily/rest-collision.cc
index 063b773a92..6448492b8f 100644
--- a/lily/rest-collision.cc
+++ b/lily/rest-collision.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  (c) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
 #include "rest-collision.hh"
@@ -14,6 +14,7 @@ using namespace std;
 #include "directional-element-interface.hh"
 #include "duration.hh"
 #include "international.hh"
+#include "item.hh"
 #include "note-column.hh"
 #include "output-def.hh"
 #include "pointer-group-interface.hh"
@@ -227,8 +228,27 @@ Rest_collision::calc_positioning_done (SCM smob)
 
       Interval notedim;
       for (vsize i = 0; i < notes.size (); i++)
-	notedim.unite (notes[i]->extent (common, Y_AXIS));
-
+	{
+	  if (Note_column::dir (notes[i]) == -dir
+	      // If the note has already happened (but it has a long duration, so there is a collision),
+	      // don't look at the stem. If we do, the rest gets shifted down a lot and it looks bad.
+	      || dynamic_cast<Item*> (notes[i])->get_column () != dynamic_cast<Item*> (rest)->get_column ())
+	    {
+	      /* try not to look at the stem, as looking at a beamed
+		 note may trigger beam positioning prematurely.
+
+		 This happens with dotted rests, which need Y
+		 positioning to compute X-positioning.
+	      */
+	      Grob *head = Note_column::first_head (notes[i]);
+	      if (head)
+		notedim.unite (head->extent (common, Y_AXIS));
+	      else
+		programming_error ("Note_column without first_head()");
+	    }
+	  else
+	    notedim.unite (notes[i]->extent (common, Y_AXIS));
+	}
 
       Real y = dir * max (0.0,
 			  -dir * restdim[-dir] + dir * notedim[dir]  + minimum_dist);
@@ -256,11 +276,12 @@ Rest_collision::calc_positioning_done (SCM smob)
 }
 
 ADD_INTERFACE (Rest_collision,
-	       "Move around ordinary rests (not multi-measure-rests) to avoid "
-	       "conflicts.",
+	       "Move around ordinary rests (not multi-measure-rests) to avoid"
+	       " conflicts.",
 
 	       /* properties */
 	       "minimum-distance "
 	       "positioning-done "
-	       "elements");
+	       "elements "
+	       );