X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fpaper-column.cc;h=af2469199941743b690c33b9f83a375518e11e42;hb=402045837e7134cdf90d1fcf31768c62227a4936;hp=cc09a3d1b1430dde0b8d77e73db9afa7871e0618;hpb=cda8fc1780778b760905c8832f7e984161218f20;p=lilypond.git

diff --git a/lily/paper-column.cc b/lily/paper-column.cc
index cc09a3d1b1..af24691999 100644
--- a/lily/paper-column.cc
+++ b/lily/paper-column.cc
@@ -3,49 +3,74 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
+
 #include "moment.hh"
 #include "paper-column.hh"
 #include "paper-score.hh"
-#include "debug.hh"
+#include "warn.hh"
 #include "axis-group-interface.hh"
-#include "spaceable-element.hh"
+#include "spaceable-grob.hh"
+#include "stencil.hh"
+#include "text-item.hh"
+#include "lookup.hh"
+#include "font-interface.hh"
+#include "paper-def.hh"
+
+
+
+
+ADD_INTERFACE (Paper_column, "paper-column-interface",
+  "  Paper_columns form the top-most item parent. (The Paper_columns X\n"
+"  parent is System, which is a spanner.)\n"
+"\n"
+"  Paper_columns form the units for the spacing engine. They are\n"
+"  numbered, the first (leftmost) is column 0. Numbering happens before\n"
+"  line-breaking, and columns are not renumbered after line breaking.\n"
+"\n"
+"  Since many columns go unused, you should only use the rank field to\n"
+"  get ordering information.  Two adjacent columns may have\n"
+"  non-adjacent numbers.\n"
+"\n"
+"  Don't be confused by right-items: each spacing wish can also contain\n"
+"  a number of items, with which a spacing constraint may be kept. It's\n"
+"  a little baroque, but it might come in handy later on?\n"
+"\n",
+  "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::get_rank (Grob*me) 
 {
-  return dynamic_cast<Paper_column*> (me)->rank_i_;
+  return dynamic_cast<Paper_column*> (me)->rank_;
 }
 
-Line_of_score*
-Paper_column::line_l() const
+System*
+Paper_column::get_system () const
 {
-  return line_l_;
+  return system_;
 }
 
 Paper_column*
-Paper_column::column_l () const
+Paper_column::get_column () 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;
+  system_=0;
+  rank_ = -1;
 }
 
 Moment
@@ -59,23 +84,85 @@ Paper_column::when_mom (Grob*me)
     }
   return s;
 }
-  
+
 bool
-Paper_column::musical_b () const
+Paper_column::is_musical (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::is_used (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,print,1);
+SCM
+Paper_column::print (SCM p)
+{
+  Grob *me = unsmob_grob (p);
+
+  String r = to_string (Paper_column::get_rank (me));
+  SCM properties = Font_interface::font_alist_chain (me);
+
+  SCM scm_mol = Text_item::interpret_markup (me->get_paper ()->self_scm (),
+					     properties,
+					     scm_makfrom0str (r.to_str0 ()));
+  Stencil t = *unsmob_stencil (scm_mol);
+  t.align_to (X_AXIS, CENTER);
+  t.align_to (Y_AXIS, DOWN);
+  
+  Stencil l = Lookup::filled_box (Box (Interval (-0.01, 0.01),
+				       Interval (-2, -1)));
+
+  t.add_stencil (l);
+  return t.smobbed_copy ();						
+}
+
+/*
+  This is all too hairy. We use bounded-by-me to make sure that some
+  columns are kept "alive". Unfortunately, when spanners are suicided,
+  this falls apart again. (sigh.)
+
+  THIS IS BROKEN KLUDGE. WE SHOULD INVENT SOMETHING BETTER. 
+ */
+MAKE_SCHEME_CALLBACK(Paper_column,before_line_breaking,1);
+SCM
+Paper_column::before_line_breaking (SCM grob)
+{
+  Grob *me = unsmob_grob (grob);
+
+  SCM c = me->get_grob_property ("bounded-by-me");
+  SCM *ptrptr = &c;
+
+  while (gh_pair_p (*ptrptr))
+    {
+      Grob * g = unsmob_grob (gh_car (*ptrptr));
+
+      if (!g || !g->live ())
+	{
+	  *ptrptr = gh_cdr (*ptrptr);
+	}
+      else
+	{
+	  ptrptr = SCM_CDRLOC (*ptrptr);
+	}
+    }
+
+  me->set_grob_property ("bounded-by-me", c);
+  return SCM_UNSPECIFIED;
+}