X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fitem.cc;h=173df20ed87fd7b19451d2f4b212ea9c0dc18eea;hb=9e69cb84d6ee5b0a861cd97869b10e3bdf0c833c;hp=973a574c5736ceb76ed8ca65ddcc1028647b5774;hpb=e6caaa132f59006e5c47d0007b24bfedd07ad145;p=lilypond.git

diff --git a/lily/item.cc b/lily/item.cc
index 973a574c57..173df20ed8 100644
--- a/lily/item.cc
+++ b/lily/item.cc
@@ -3,11 +3,12 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
 #include "item.hh"
 
+#include "axis-group-interface.hh"
 #include "paper-score.hh"
 #include "warn.hh"
 #include "paper-column.hh"
@@ -25,7 +26,6 @@ Item::Item (SCM s, Object_key const *key)
   : Grob (s, key)
 {
   broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] = 0;
-  interfaces_ = scm_cons (ly_symbol2scm ("item-interface"), interfaces_);
 }
 
 /**
@@ -38,16 +38,13 @@ Item::Item (Item const &s, int copy_count)
 }
 
 bool
-Item::is_breakable (Grob *me)
+Item::is_non_musical (Grob *me)
 {
-  if (me->original_)
+  if (me->original ())
     return false;
 
-  if (!dynamic_cast<Item *> (me))
-    me->programming_error ("only items can be breakable.");
-
   Item *i = dynamic_cast<Item *> (me->get_parent (X_AXIS));
-  return (i) ? Item::is_breakable (i) : to_boolean (me->get_property ("breakable"));
+  return i ? Item::is_non_musical (i) : to_boolean (me->get_property ("non-musical"));
 }
 
 Paper_column *
@@ -74,7 +71,7 @@ Item::copy_breakable_items ()
     {
       Grob *dolly = clone (count++);
       Item *item = dynamic_cast<Item *> (dolly);
-      pscore_->root_system ()->typeset_grob (item);
+      get_root_system (this)->typeset_grob (item);
       new_copies[i] = item;
     }
   while (flip (&i) != LEFT);
@@ -97,7 +94,7 @@ Item::discretionary_processing ()
   if (is_broken ())
     return;
 
-  if (Item::is_breakable (this))
+  if (Item::is_non_musical (this))
     copy_breakable_items ();
 }
 
@@ -131,9 +128,9 @@ Item::find_prebroken_piece (Direction d) const
 Direction
 Item::break_status_dir () const
 {
-  if (original_)
+  if (original ())
     {
-      Item *i = dynamic_cast<Item *> (original_);
+      Item *i = dynamic_cast<Item *> (original ());
 
       return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;
     }
@@ -149,40 +146,48 @@ Item::handle_prebroken_dependencies ()
   /*
     Can't do this earlier, because try_visibility_lambda () might set
     the elt property transparent, which would then be copied.
-
-    TODO:
-
-    give the item to break-visibility itself, so the function can do
-    more complicated things.
   */
   SCM vis = get_property ("break-visibility");
-  if (ly_is_procedure (vis))
+  if (scm_is_vector (vis))
     {
-      SCM args = scm_list_n (scm_int2num (break_status_dir ()), SCM_UNDEFINED);
-      SCM result = scm_apply_0 (vis, args);
-      bool trans = ly_scm2bool (scm_car (result));
-      bool empty = ly_scm2bool (scm_cdr (result));
+      bool visible = to_boolean (scm_c_vector_ref (vis, break_status_dir () + 1));
 
-      if (empty && trans)
+      if (!visible)
 	suicide ();
-      else if (empty)
-	{
-	  set_extent (SCM_EOL, X_AXIS);
-	  set_extent (SCM_EOL, Y_AXIS);
-	}
-      else if (trans)
-	set_property ("print-function", SCM_EOL);
     }
 }
 
-SCM
-Item::do_derived_mark () const
+bool
+Item::pure_is_visible (int start, int end) const
+{
+  SCM vis = get_property ("break-visibility");
+  if (scm_is_vector (vis))
+    {
+      int pos = 1;
+      int pc_rank = Paper_column::get_rank (get_column ());
+      if (pc_rank == start)
+	pos = 2;
+      else if (pc_rank == end)
+	pos = 0;
+      return to_boolean (scm_vector_ref (vis, scm_from_int (pos)));
+    }
+  return true;
+}
+
+Interval_t<int>
+Item::spanned_rank_iv ()
+{
+  int c = get_column ()->get_rank ();
+  return Interval_t<int> (c, c);
+}
+
+void
+Item::derived_mark () const
 {
   if (broken_to_drul_[LEFT])
     scm_gc_mark (broken_to_drul_[LEFT]->self_scm ());
   if (broken_to_drul_[RIGHT])
     scm_gc_mark (broken_to_drul_[RIGHT]->self_scm ());
-  return SCM_EOL;
 }
 
 Item *
@@ -192,9 +197,7 @@ unsmob_item (SCM s)
 }
 
 ADD_INTERFACE (Item,
-	       "item-interface",
-	       "\n"
-	       "\n"
+
 	       "Grobs can be distinguished in their role in the horizontal spacing.\n"
 	       "Many grobs define constraints on the spacing by their sizes. For\n"
 	       "example, note heads, clefs, stems, and all other symbols with a fixed\n"
@@ -225,5 +228,10 @@ ADD_INTERFACE (Item,
 	       "  all-visible                yes     yes    yes\n"
 	       "  begin-of-line-invisible    yes     yes    no\n"
 	       "  end-of-line-invisible      no      yes    yes\n"
+	       "  center-invisible           yes      no    yes\n"
 	       "@end example\n",
-	       "no-spacing-rods break-visibility breakable")
+
+	       /* properties */
+	       "break-visibility "
+	       "no-spacing-rods "
+	       "non-musical")