X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finclude%2Fitem.hh;h=ea0af2eb53de023dfc8c3a7b93f67d731d7dcbd7;hb=481e336f410e933bea8705862743fc078ccb49f7;hp=0838c00a49be7e85659245b3b1b392aa9f478729;hpb=38367909027cad1f36c4dde2f7ceaab22b3290aa;p=lilypond.git

diff --git a/lily/include/item.hh b/lily/include/item.hh
index 0838c00a49..ea0af2eb53 100644
--- a/lily/include/item.hh
+++ b/lily/include/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);