/*
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 "lily-proto.hh"
-#include "score-elem.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
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_;
-
- /* *************** */
- DECLARE_MY_RUNTIME_TYPEINFO;
- virtual Spanner* spanner() { return this; }
- Spanner();
- bool broken_b() const;
- Spanner* find_broken_piece(Line_of_score*)const;
+ 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 ();
protected:
- SCORE_ELEM_CLONE(Spanner);
- virtual void break_into_pieces();
-
- Link_array<Spanner> broken_into_l_arr_;
-
- virtual void do_break_processing();
- virtual Interval do_width()const;
- virtual void do_print()const;
- virtual Line_of_score*line_l()const;
+ void set_my_columns ();
+
+ VIRTUAL_COPY_CONS (Grob);
+ virtual void do_break_processing ();
+ virtual System*line_l () const;
};
+
+
+void add_bound_item (Spanner*, Item* n);
+void extend_spanner_over_elements (Grob* span);
+
+
#endif