release: 1.3.109

[lilypond.git] / lily / tie-column.cc

diff --git a/lily/tie-column.cc b/lily/tie-column.cc
index be2116eeeb0a4a8fbadab189d9add99703b30913..552c98de7017d188437927d02ad7cac740d11113 100644 (file)
--- a/lily/tie-column.cc
+++ b/lily/tie-column.cc
@@ -7,30 +7,118 @@
   
  */
 
+#include "spanner.hh"
 #include "tie-column.hh"
 #include "group-interface.hh"
+#include "tie.hh"
+#include "directional-element-interface.hh"
+#include "rhythmic-head.hh"
 
-Tie_column::Tie_column ()
+
+
+void
+Tie_column::set_interface (Grob*me)
 {
-  set_elt_property ("ties", SCM_EOL);
+  me->set_interface (ly_symbol2scm ("tie-column-interface"));
+  me->set_extent_callback (SCM_EOL, X_AXIS);
+  me->set_extent_callback (SCM_EOL, Y_AXIS) ; 
 }
 
-void
-Tie_column::add_tie (Score_element *s)
+bool
+Tie_column::has_interface (Grob*me)
 {
-  group (s).add_element (s);
-  s->add_dependency (this);
+  return  me->has_interface (ly_symbol2scm ("tie-column-interface"));
 }
 
+
+/*
+  tie dir depends on what Tie_column does.
+*/
+
 void
-Tie_column::set_directions ()
+Tie_column::add_tie (Grob*me,Grob *s)
 {
-  Link_array<Score_element> s =
-    Group_interface__extract_elements (this, (Score_element*)0, "ties");
+  if (!  Pointer_group_interface ::count (me, "ties"))
+    {
+      dynamic_cast<Spanner*> (me)->set_bound (LEFT, Tie::head (s,LEFT));
+      dynamic_cast<Spanner*> (me)->set_bound (RIGHT, Tie::head (s,RIGHT));
+    }
+  
+  Pointer_group_interface::add_element (me, "ties",s);
+  s->add_dependency (me);
 }
 
+
+int
+tie_compare (Grob* const & s1,
+            Grob* const & s2)
+{
+  return sign (Tie::position_f (s1) - Tie::position_f(s2));
+}
+
+/*
+  See [Ross p. 138].
+
+
+  In normal chord cases, the outer ties point outwards, and the
+  direction of the rest is determined by their staff position.
+
+  Ross forgets about the tie that is *on* the middle staff line. We
+  assume it goes UP. (TODO: make me settable) */
 void
-Tie_column::do_post_processing ()
+Tie_column::set_directions (Grob*me)
+{
+  Link_array<Grob> ties =
+    Pointer_group_interface__extract_elements (me, (Grob*)0, "ties");
+
+  for (int i = ties.size (); i--; )
+    if (Directional_element_interface::get (ties[i]))
+      ties.del (i);
+  
+
+  if(!ties.size())
+    return ;
+  
+
+  Direction d = Directional_element_interface::get (me);
+  if (d)
+    {
+      for (int i = ties.size (); i--;)
+       {
+         Grob *  t = ties[i];
+         Directional_element_interface::set (t, d);
+       }
+      return;
+    }
+  
+  if (ties.size () == 1)
+    {
+      Grob *  t = ties[0];      
+      Directional_element_interface::set (t,Tie::get_default_dir (t));
+      return;
+    }
+  
+  ties.sort (tie_compare);
+  Directional_element_interface::set( ties[0], DOWN);
+  ties.del (0);
+  
+  Directional_element_interface ::set(ties.pop (), UP);
+  for (int i=ties.size(); i--; )
+    {
+      Grob *  t = ties[i];
+      Real p = Tie::position_f (t);
+      Direction d = (Direction) sign (p);
+      if (!d)
+       d = UP;
+      Directional_element_interface::set (t, d);
+    }
+  
+}
+
+MAKE_SCHEME_CALLBACK(Tie_column,after_line_breaking,1);
+SCM
+Tie_column::after_line_breaking (SCM smob)
 {
-  set_directions ();
+  set_directions (unsmob_element (smob));
+  return SCM_UNSPECIFIED;
 }