/*
- 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_intos_;
+
+ int break_index_;
+ // 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 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 () 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_CONS (Grob);
+ virtual void do_break_processing ();
};
+
+void add_bound_item (Spanner*, Grob*);
+///DECLARE_UNSMOB (Spanner, spanner);
+
#endif