Several fixes for annotate-spacing.

[lilypond.git] / lily / grob.cc

diff --git a/lily/grob.cc b/lily/grob.cc
index 36aadb4e938b549df05260d98cf7dc13030e6455..fa8e1f684307453ec9d90b1d4998c9747b2e212a 100644 (file)
--- a/lily/grob.cc
+++ b/lily/grob.cc
@@ -572,6 +572,82 @@ Grob::fixup_refpoint ()
     }
 }
 
+/****************************************************************
+  VERTICAL ORDERING
+****************************************************************/
+
+Grob*
+get_maybe_root_vertical_alignment (Grob *g, Grob *maybe)
+{
+  if (!g)
+    return maybe;
+  if (Align_interface::has_interface (g))
+    return get_maybe_root_vertical_alignment (g->get_parent (Y_AXIS), g);
+  return get_maybe_root_vertical_alignment (g->get_parent (Y_AXIS), maybe);
+
+}
+
+Grob*
+Grob::get_root_vertical_alignment (Grob *g)
+{
+  return get_maybe_root_vertical_alignment (g, 0);
+}
+
+Grob*
+Grob::get_vertical_axis_group (Grob *g)
+{
+  if (!g)
+    return 0;
+  if (Axis_group_interface::has_interface (g)
+      && Align_interface::has_interface (g->get_parent (Y_AXIS)))
+    return g;
+  return get_vertical_axis_group (g->get_parent (Y_AXIS));
+
+}
+
+int
+Grob::get_vertical_axis_group_index (Grob *g)
+{
+  Grob *val = get_root_vertical_alignment (g);
+  if (!val)
+    return -1;
+  Grob *vax = get_vertical_axis_group (g);
+  extract_grob_set (val, "elements", elts);
+  for (vsize i = 0; i < elts.size (); i++)
+    if (elts[i] == vax)
+      return (int) i;
+  g->programming_error ("could not find this grob's vertical axis group in the vertical alignment");
+  return -1;
+}
+
+bool
+Grob::vertical_less (Grob *g1, Grob *g2)
+{
+  Grob *vag = get_root_vertical_alignment (g1);
+  if (!vag)
+    return false;
+  if (!vag)
+    {
+      g1->programming_error ("grob does not belong to a VerticalAlignment?");
+      return false;
+    }
+  Grob *ag1 = get_vertical_axis_group (g1);
+  Grob *ag2 = get_vertical_axis_group (g2);
+
+  extract_grob_set (vag, "elements", elts);
+
+  for (vsize i = 0; i < elts.size (); i++)
+    {
+      if (elts[i] == ag1)
+        return true;
+      if (elts[i] == ag2)
+        return false;
+    }
+
+  g1->programming_error ("could not place this grob in its axis group");
+  return false;
+}
+
 /****************************************************************
   MESSAGES
 ****************************************************************/