source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#ifndef ITEM_HH
#define ITEM_HH
-#include "glob.hh"
-#include "boxes.hh"
-#include "string.hh"
-#include "score-elem.hh"
+
+#include "box.hh"
+#include "grob.hh"
+#include "drul-array.hh"
+#include "protected-scm.hh"
/**
- a horizontally fixed size element of the score
+ A horizontally fixed size element of the score.
Item is the datastructure for printables whose width is known
before the spacing is calculated
- NB. This doesn't mean an Item has to initialize the output field before
- spacing calculation.
-
*/
-class Item : public virtual Score_elem {
+class Item : public Grob
+{
+ Drul_array<Item*> broken_to_drul_;
+
public:
- /// indirection to the column it is in
- PCol * pcol_l_;
-
- Item * broken_to_a_[2];
-
- // nobreak = 0, pre =1, post = 2
- int break_status_i()const;
- Item * find_prebroken_piece(PCol*)const;
- Item * find_prebroken_piece(Line_of_score*)const;
-
- virtual Item *item() { return this; }
- Item();
- Real hpos_f() const;
- DECLARE_MY_RUNTIME_TYPEINFO;
- virtual Line_of_score * line_l() const;
-protected:
- virtual void do_breakable_col_processing();
- virtual void handle_prebroken_dependencies();
- virtual void do_print()const;
+ VIRTUAL_COPY_CONS(Grob);
+ Item (SCM);
+ Item (Item const &);
+ static bool breakable_b (Grob*me);
+ bool broken_b () const;
+
+ Direction break_status_dir () const;
+
+ Item * find_prebroken_piece (Direction) const;
+ Grob * find_broken_piece (Line_of_score*) const;
+
+ virtual Line_of_score * line_l() const;
+ virtual Paper_column * column_l () const;
+ virtual void handle_prebroken_dependencies ();
+protected:
+ virtual void discretionary_processing ();
+ void copy_breakable_items();
+ virtual SCM do_derived_mark ();
};