''

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

diff --git a/lily/paper-column.cc b/lily/paper-column.cc
index 985b080a079dedcac2899b2c412ec59eebea8741..e68395807dff33e84c7d4e496ef4bb5cbdce0aa6 100644 (file)
--- a/lily/paper-column.cc
+++ b/lily/paper-column.cc
@@ -3,30 +3,59 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2001 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-element.hh"
+#include "spaceable-grob.hh"
+#include "molecule.hh"
+#include "text-item.hh"
+#include "lookup.hh"
+#include "font-interface.hh"
+
+
+
+
+
+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.)
+
+  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");
+
 
 void
 Paper_column::do_break_processing ()
 {
-  Spaceable_grob::remove_interface(this);
+  Spaceable_grob::remove_interface (this);
   Item::do_break_processing ();
 }
 
 int
-Paper_column::rank_i(Grob*me) 
+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_;
 }
@@ -34,16 +63,12 @@ Paper_column::line_l() const
 Paper_column*
 Paper_column::column_l () const
 {
-  return (Paper_column*)(this);
+  return (Paper_column*) (this);
 }
 
 Paper_column::Paper_column (SCM l)
   : Item (l)           // guh.?
 {
-  Axis_group_interface::set_interface (this);
-  Axis_group_interface::set_axes (this, X_AXIS, X_AXIS);
-  Spaceable_grob::set_interface (this);
-
   line_l_=0;
   rank_i_ = -1;
 }
@@ -59,23 +84,51 @@ Paper_column::when_mom (Grob*me)
     }
   return s;
 }
-  
+
 bool
-Paper_column::musical_b () const
+Paper_column::musical_b (Grob *me)
 {
-  SCM m = get_grob_property ("shortest-starter-duration");
+  SCM m = me->get_grob_property ("shortest-starter-duration");
   Moment s (0);
   if (unsmob_moment (m))
     {
       s = *unsmob_moment (m);
     }
-  return s != Moment(0);
+  return s != Moment (0);
+  
 }
+  
 
 bool
-Paper_column::used_b (Grob*me )
+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 ();                                            
+}
+