release: 1.5.29

[lilypond.git] / lily / include / dimension-cache.hh

diff --git a/lily/include/dimension-cache.hh b/lily/include/dimension-cache.hh
index e15bc9b5b14c98a8865037e8704dba2cee296458..8897dc6fd418b59f18559ccc53e5b188f4c8aa7c 100644 (file)
--- a/lily/include/dimension-cache.hh
+++ b/lily/include/dimension-cache.hh
@@ -3,7 +3,7 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1998--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
@@ -14,51 +14,41 @@
 #include "real.hh"
 #include "lily-proto.hh"
 #include "parray.hh"
+#include "dimension-cache-callback.hh"
+#include "lily-guile.hh"
 
 
 /**
-  Adminstration of offset  dimension info. 
- */
-class Dimension_cache
+  Adminstration of offset dimension info.
+*/
+struct Dimension_cache
 {
-  bool valid_b_;
-  /** Is this element dimensionless?.
-    This is private to guarantee correctness of the cache
+  /*
+    Multi typed:
+
+     - cons: interval
+     - procedure: callback
+     - else: empty
    */
-  bool empty_b_;
-  Interval dim_;
+  SCM dimension_;
+
   /**
     The offset wrt. to the center of #parent_l_#
    */
-  Real offset_;
-  Graphical_element *elt_l_;
-  friend class Graphical_element;
 
-  void init ();
-public:
-  /** The #offset_# is defined with regard to this graphical_element/
-    dimension_cache.  */
-  
-  Dimension_cache * parent_l_;
-  Link_array<Dimension_cache> dependencies_l_arr_;
-  
-  Real absolute_coordinate () const;
-  void invalidate ();
-  void invalidate_dependencies ();
+  Real offset_;
+  SCM offset_callbacks_;
   
-  Dimension_cache(Dimension_cache const&);
+  char offsets_left_;
+
+  /**
+     What to call to find extent.  Nil means empty. 
+   */
+  Grob * parent_l_;
+
+  Dimension_cache (Dimension_cache const&);
   Dimension_cache ();
-  void set_group_l (Graphical_axis_group*);
-  Real relative_coordinate (Dimension_cache *d) const;
-  Dimension_cache*common_group (Dimension_cache const* s) const;
-  Dimension_cache*common_group (Link_array<Dimension_cache> caches) const;
-  void set_empty (bool);
-  void translate (Real);
-  void set_offset (Real);
-  bool valid_b () const { return valid_b_; }
-  bool empty_b() const { return empty_b_; }
-  void set_dim (Interval);
-  Interval get_dim () const;
+  void init ();
 };