Fix 537 (introduced in c0e7005ed202874f8ea67279e5c96ec53985c3fb)

[lilypond.git] / lily / pitch-interval.cc

diff --git a/lily/pitch-interval.cc b/lily/pitch-interval.cc
index 064c6343275974e0fafbd790e1fc30f9a36d8b0a..3043bbff07a8f9c5bec36394175da7bc71c386a2 100644 (file)
--- a/lily/pitch-interval.cc
+++ b/lily/pitch-interval.cc
@@ -28,11 +28,65 @@ Pitch_interval::is_empty () const
   return at (LEFT) > at (RIGHT);
 }
 
-void
+Direction
 Pitch_interval::add_point (Pitch p)
 {
-  if (at (LEFT) > p)
-    at (LEFT) = p;
-  if (at (RIGHT) < p)
-    at (RIGHT) = p;
+  if (is_empty())
+    {
+      at (LEFT) = at (RIGHT) = p;
+      return CENTER;
+    }
+  else if (at (LEFT).tone_pitch () > p.tone_pitch ())
+    {
+      at (LEFT) = p;
+      return LEFT;
+    }
+  else if (at (RIGHT).tone_pitch () < p.tone_pitch ())
+    {
+      at (RIGHT) = p;
+      return RIGHT;
+    }
+  else
+    return CENTER;
+}
+
+
+Pitch_lexicographic_interval::Pitch_lexicographic_interval (Pitch p1, Pitch p2)
+{
+  at (LEFT) = p1;
+  at (RIGHT) = p2;
+}
+
+Pitch_lexicographic_interval::Pitch_lexicographic_interval ()
+{
+  at (LEFT) = Pitch (100, 0, 0);
+  at (RIGHT) = Pitch (-100, 0, 0);
+}
+
+bool
+Pitch_lexicographic_interval::is_empty () const
+{
+  return at (LEFT) > at (RIGHT);
+}
+
+Direction
+Pitch_lexicographic_interval::add_point (Pitch p)
+{
+  if (is_empty())
+    {
+      at (LEFT) = at (RIGHT) = p;
+      return CENTER;
+    }
+  else if (at (LEFT) > p)
+    {
+      at (LEFT) = p;
+      return LEFT;
+    }
+  else if (at (RIGHT) < p)
+    {
+      at (RIGHT) = p;
+      return RIGHT;
+    }
+  else
+    return CENTER;
 }