* lily/engraver-group-engraver.cc (do_announces): rename

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

diff --git a/lily/include/spanner.hh b/lily/include/spanner.hh
index 43a3567fa52faf609869d1d3b9bc7aa3117fa391..4327653e00f8693afc8c4c1d2fedf2f7b121ccf5 100644 (file)
--- a/lily/include/spanner.hh
+++ b/lily/include/spanner.hh
@@ -1,54 +1,71 @@
 /*
-  spanner.hh -- part of LilyPond
+  spanner.hh -- part of GNU LilyPond
 
-  (c) 1996,97 Han-Wen Nienhuys
+  (c) 1996--2002 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_;
+
+public:
+  DECLARE_SCHEME_CALLBACK (set_spacing_rods, (SCM ));
+  
+  Link_array<Spanner> broken_into_l_arr_;
+
+  // todo: move to somewhere else.
+  Real get_broken_left_end_align () const;
+  
+  // 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 broken_b () 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 ();
+    static bool has_interface (Grob*);
 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_CONS (Grob);
+  virtual void do_break_processing ();
+  virtual System*line_l () const;
 };
+
+
+void add_bound_item (Spanner*, Grob*);
+void extend_spanner_over_elements (Grob*  span);
+
+
 #endif