* lily/staff-symbol-engraver.cc (acknowledge_grob): remove item ->

[lilypond.git] / lily / include / spanner.hh

diff --git a/lily/include/spanner.hh b/lily/include/spanner.hh
index 43a3567fa52faf609869d1d3b9bc7aa3117fa391..f04c3aca5651dadc4a435469ce13d8ddc1e50c4e 100644 (file)
--- a/lily/include/spanner.hh
+++ b/lily/include/spanner.hh
@@ -1,54 +1,74 @@
 /*
-  spanner.hh -- part of LilyPond
+  spanner.hh -- part of GNU LilyPond
 
-  (c) 1996,97 Han-Wen Nienhuys
+  (c) 1996--2004 Han-Wen Nienhuys
 */
 
 #ifndef SPANNER_HH
 #define SPANNER_HH
 
-#include "proto.hh"
-#include "staff-elem.hh"
+#include "lily-proto.hh"
+#include "grob.hh"
+#include "drul-array.hh"
+#include "rod.hh"
 
-
-/** a symbol which is attached between two columns. A spanner is a symbol which spans across several columns, so its
-  final appearance can only be calculated after the breaking problem
-  is solved.
+/** A symbol which is attached between two columns. A spanner is a
+  symbol which spans across several columns, so its final appearance
+  can only be calculated after the breaking problem is solved.
 
   Examples
 
-  - (de)crescendo
-  - slur
-  - beam
-  - bracket
-  
+  * (de)crescendo
+  * slur
+  * beam
+  * bracket
 
   Spanner should know about the items which it should consider:
-    e.g. slurs should be steep enough to "enclose" all those items. This
-    is absolutely necessary for beams, since they have to adjust the
-    length of stems of notes they encompass.
-
-    */
-struct Spanner:Staff_elem {
-    PCol *left, *right;
-
-    
-    /* *************** */
-    
-    Spanner();
-    virtual Interval width()const;
-    void do_print()const;
-
-    Spanner *broken_at(PCol *c1,  PCol *c2) const;
-    virtual Spanner* spanner() { return this; }
+  e.g. slurs should be steep enough to "enclose" all those items. This
+  is absolutely necessary for beams, since they have to adjust the
+  length of stems of notes they encompass.
+
+  */
+class Spanner : public  Grob {
+  Drul_array<Item*> spanned_drul_;
+  int break_index_;
+  
+public:
+  DECLARE_SCHEME_CALLBACK (set_spacing_rods, (SCM));
+  
+  Link_array<Spanner> broken_intos_;
+
+  int get_break_index () const;
+  // todo: move to somewhere else.
+  Real get_broken_left_end_align () const;
+  void substitute_one_mutable_property (SCM sym, SCM val)  ;
+  bool fast_fubstitute_grob_list (SCM sym, SCM grob_list);
+  // TODO: make virtual and do this for Items as well.
+  Interval_t<int> spanned_rank_iv ();
+  void set_bound (Direction d, Grob*);
+  Item *get_bound (Direction d) const;
+  
+  Spanner (SCM);
+  Spanner (Spanner const &);
+  bool is_broken () const;
+  void do_break ();
+  Real spanner_length () const;
+
+  static int compare (Spanner * const &,Spanner * const &);
+  virtual Grob* find_broken_piece (System*) const;
+  virtual SCM do_derived_mark () const;
+  static bool has_interface (Grob*);
+  virtual System *get_system () const;
+
 protected:
+  void set_my_columns ();
 
-    /**
-  clone a piece of  this spanner.
-    PRE
-    c1 >= start, c2  <= stop
-    */
-    virtual Spanner *do_break_at( PCol *c1,  PCol *c2) const=0;
-    NAME_MEMBERS(Spanner);
+  VIRTUAL_COPY_CONSTRUCTOR (Grob, Spanner);
+  virtual void do_break_processing ();
 };
+
+void add_bound_item (Spanner*, Grob*);
+///DECLARE_UNSMOB (Spanner, spanner);
+
+int broken_spanner_index (Spanner * sp);
 #endif