X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finclude%2Fitem.hh;h=1895910fb6c95ea21a45fbfa06cbbc6c79e0c80e;hb=0387f04497978e37b335a8b99eec905499d6ad0f;hp=0838c00a49be7e85659245b3b1b392aa9f478729;hpb=3846cd517023c7e63379eefb8dde3a8de3b8fbe4;p=lilypond.git

diff --git a/lily/include/item.hh b/lily/include/item.hh
index 0838c00a49..1895910fb6 100644
--- a/lily/include/item.hh
+++ b/lily/include/item.hh
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 #ifndef ITEM_HH
 #define ITEM_HH
@@ -29,6 +29,7 @@ public:
 
   static bool is_non_musical (Grob *);
   static bool break_visible(Grob *);
+  static bool less (Grob * const&, Grob * const&);
   bool is_broken () const;
   bool pure_is_visible (int start, int end) const;
 
@@ -40,11 +41,15 @@ public:
   virtual Paper_column *get_column () const;
   virtual void handle_prebroken_dependencies ();
   virtual Interval_t<int> spanned_rank_interval () const;
+  virtual Interval pure_height (Grob *ref, int start, int end);
   DECLARE_GROB_INTERFACE();
 protected:
   virtual void discretionary_processing ();
   void copy_breakable_items ();
   virtual void derived_mark () const;
+
+  bool cached_pure_height_valid_;
+  Interval cached_pure_height_;
 };
 
 Interval_t<Moment> spanned_time_interval (Item *l, Item *r);