''

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

diff --git a/lily/paper-column.cc b/lily/paper-column.cc
index d81fc89911109df902b462e0ec9c185e5a3a5cbf..e68395807dff33e84c7d4e496ef4bb5cbdce0aa6 100644 (file)
--- a/lily/paper-column.cc
+++ b/lily/paper-column.cc
@@ -3,87 +3,59 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c)  1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
+
 #include "moment.hh"
 #include "paper-column.hh"
 #include "paper-score.hh"
 #include "debug.hh"
 #include "axis-group-interface.hh"
+#include "spaceable-grob.hh"
+#include "molecule.hh"
+#include "text-item.hh"
+#include "lookup.hh"
+#include "font-interface.hh"
 
-void
-Paper_column::add_rod (Paper_column * p, Real d)
-{
-  Direction dir =  Direction (sign (p->rank_i ()  - rank_i ()));
-  
-  if (dir != RIGHT)
-    {
-      programming_error ("Must set minimum distance LTOR.");
-      return;
-    }
-  
-  for (int i=0; i < minimal_dists_.size (); i++)
-    {
-      Column_rod &rod = minimal_dists_[i];
-      if (rod.other_l_ == p)
-       {
-         rod.distance_f_ = rod.distance_f_ >? d;
-         return ;
-       }
-    }
 
-  Column_rod cr;
-  cr.distance_f_ = d;
-  cr.other_l_ = p;
 
-  minimal_dists_.push (cr);
-}
 
-void
-Paper_column::add_spring (Paper_column * p, Real d, Real s)
-{
-  Direction dir =  Direction (sign (p->rank_i ()  - rank_i ()));
-  
-  if (dir != RIGHT)
-    {
-      programming_error ("Must set springs LTOR");
-      return;
-    }
-  
-  for (int i=0; i < springs_.size (); i++)
-    {
-      Column_spring &spring = springs_[i];
-      if (spring.other_l_ == p)
-       {
-         spring.distance_f_ = spring.distance_f_ >? d;
-         return ;
-       }
-    }
 
-  Column_spring cr;
-  cr.distance_f_ = d;
-  cr.strength_f_ = s;  
-  cr.other_l_ = p;
+ADD_INTERFACE (Paper_column, "paper-column-interface",
+  "  Paper_columns form the top-most item parent. (The Paper_columns X
+  parent is System, which is a spanner.)
 
-  springs_.push (cr);
-}
+  Paper_columns form the units for the spacing engine. They are
+  numbered, the first (leftmost) is column 0. Numbering happens before
+  line-breaking, and columns are not renumbered after line breaking.
+
+  Since many columns go unused, you should only use the rank field to
+  get ordering information.  Two adjacent columns may have
+  non-adjacent numbers.
+
+  Don't be confused by right-items: each spacing wish can also contain
+  a number of items, with which a spacing constraint may be kept. It's
+  a little baroque, but it might come in handy later on?
+
+",
+  "between-cols between-system-string when bounded-by-me shortest-playing-duration shortest-starter-duration");
 
-int
-Paper_column::rank_i() const
-{
-  return rank_i_;
-}
 
 void
-Paper_column::set_rank (int i)
+Paper_column::do_break_processing ()
 {
-  rank_i_ = i;
+  Spaceable_grob::remove_interface (this);
+  Item::do_break_processing ();
 }
 
+int
+Paper_column::rank_i (Grob*me) 
+{
+  return dynamic_cast<Paper_column*> (me)->rank_i_;
+}
 
-
-Line_of_score*
-Paper_column::line_l() const
+System*
+Paper_column::line_l () const
 {
   return line_l_;
 }
@@ -91,43 +63,72 @@ Paper_column::line_l() const
 Paper_column*
 Paper_column::column_l () const
 {
-  return (Paper_column*)(this);
+  return (Paper_column*) (this);
 }
 
-Paper_column::Paper_column (Moment w)
+Paper_column::Paper_column (SCM l)
+  : Item (l)           // guh.?
 {
-  SCM when = (new Moment (w))->smobify_self ();
-  scm_unprotect_object (when);
-  set_elt_property ("when", when);
-
-  Axis_group_interface (this).set_interface ();
-  Axis_group_interface (this).set_axes (X_AXIS, X_AXIS);
-
   line_l_=0;
   rank_i_ = -1;
 }
 
 Moment
-Paper_column::when_mom () const
+Paper_column::when_mom (Grob*me)
 {
-  SCM m = get_elt_property ("when");
+  SCM m = me->get_grob_property ("when");
   Moment s (0);
-  if (SMOB_IS_TYPE_B(Moment, m))
+  if (unsmob_moment (m))
     {
-      s = *SMOB_TO_TYPE (Moment,m);
+      return *unsmob_moment (m);
     }
   return s;
 }
-  
+
 bool
-Paper_column::musical_b () const
+Paper_column::musical_b (Grob *me)
 {
-  SCM m = get_elt_property ("shortest-starter-duration");
+  SCM m = me->get_grob_property ("shortest-starter-duration");
   Moment s (0);
-  if (SMOB_IS_TYPE_B(Moment, m))
+  if (unsmob_moment (m))
     {
-      s = *SMOB_TO_TYPE (Moment,m);
+      s = *unsmob_moment (m);
     }
-  return s != Moment(0);
+  return s != Moment (0);
+  
+}
+  
+
+bool
+Paper_column::used_b (Grob*me)
+{
+  return gh_pair_p (me->get_grob_property ("elements")) ||  Item::breakable_b (me)
+    || gh_pair_p (me->get_grob_property ("bounded-by-me"))
+    ;
+}
+
+/*
+  Print a vertical line and  the rank number, to aid debugging.  
+ */
+
+MAKE_SCHEME_CALLBACK(Paper_column,brew_molecule,1);
+SCM
+Paper_column::brew_molecule (SCM p)
+{
+  Grob *me = unsmob_grob (p);
+
+  String r = to_str (Paper_column::rank_i (me));
+  SCM properties = Font_interface::font_alist_chain (me);
+  
+  Molecule t = Text_item::text2molecule (me, ly_str02scm (r.ch_C()),
+                                        properties);
+  t.align_to (X_AXIS, CENTER);
+  t.align_to (Y_AXIS, DOWN);
+  
+  Molecule l = Lookup::filledbox (Box (Interval (-0.01, 0.01),
+                                      Interval (-2, -1)));
+
+  t.add_molecule (l);
+  return t.smobbed_copy ();                                            
 }