/*
- 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
+/** 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
- \begin{itemize}
- \item (de)crescendo
- \item slur
- \item beam
- \item bracket
- \end{itemize}
-
+ * (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.
- */
-class Spanner:public virtual Score_elem {
+ */
+class Spanner : public Grob {
+ Drul_array<Item*> spanned_drul_;
+
public:
- PCol *left_col_l_, *right_col_l_;
-
-
- /* *************** */
- NAME_MEMBERS(Spanner);
- virtual Spanner* spanner() { return this; }
- Spanner();
- Spanner *broken_at(PCol *c1, PCol *c2) const;
-protected:
+ DECLARE_SCHEME_CALLBACK (set_spacing_rods, (SCM ));
+
+ Link_array<Spanner> broken_into_l_arr_;
- virtual Interval do_width()const;
- void do_print()const;
+ // 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;
+ 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