/*
- spanner.hh -- part of LilyPond
+ spanner.hh -- part of GNU LilyPond
- (c) 1996,97 Han-Wen Nienhuys
+ (c) 1996--2006 Han-Wen Nienhuys
*/
#ifndef SPANNER_HH
#define SPANNER_HH
-#include "proto.hh"
-#include "staff-elem.hh"
+#include "grob.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
- Examples
+ * (de)crescendo
+ * slur
+ * beam
+ * bracket
- - (de)crescendo
- - slur
- - beam
- - bracket
-
-
- Spanner should know about the items which it should consider:
+ 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.
+*/
+class Spanner : public Grob
+{
+ Drul_array<Item *> spanned_drul_;
+ vsize break_index_;
- */
-struct Spanner:Staff_elem {
- PCol *left_col_l_, *right_col_l_;
+ DECLARE_CLASSNAME(Spanner);
-
- /* *************** */
-
- Spanner();
- virtual Interval width()const;
- void do_print()const;
+public:
+ DECLARE_SCHEME_CALLBACK (set_spacing_rods, (SCM));
- Spanner *broken_at(PCol *c1, PCol *c2) const;
- virtual Spanner* spanner() { return this; }
-protected:
+ vector<Spanner*> broken_intos_;
+
+ vsize 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_substitute_grob_array (SCM sym, Grob_array *);
+
+ // 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;
- /**
- 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);
+ Spanner (SCM, Object_key const *);
+ Spanner (Spanner const &, int copy_count);
+ 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 void derived_mark () const;
+ static bool has_interface (Grob *);
+ virtual System *get_system () const;
+
+protected:
+ void set_my_columns ();
+ virtual Grob *clone (int count) const;
+ virtual void do_break_processing ();
};
+
+void add_bound_item (Spanner *, Grob *);
+
+bool spanner_less (Spanner *s1, Spanner *s2);
+int broken_spanner_index (Spanner *sp);
#endif