source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#ifndef ITEM_HH
#define ITEM_HH
#include "box.hh"
-#include "string.hh"
-#include "score-element.hh"
+#include "grob.hh"
#include "drul-array.hh"
-#include "protected-scm.hh"
+
/**
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.
-
-
-
- @signature
- visibility_lambda :: int -> (bool . bool)
-
- @in
- break direction
-
- @out
- (transparent, empty) cons
-
- */
-class Item : public virtual Score_element {
- void do_break ();
- void try_visibility_lambda ();
+*/
+class Item : public Grob
+{
Drul_array<Item*> broken_to_drul_;
-
public:
+ VIRTUAL_COPY_CONS (Grob);
+ Item (SCM);
+ Item (Item const &);
- /// I am really to be broken?
- bool breakable_b () const;
- bool broken_original_b () const;
+ static bool breakable_b (Grob *);
+ bool broken_b () const;
Direction break_status_dir () const;
- Item * find_broken_piece (Direction) const;
- Score_element * find_broken_piece (Line_of_score*) const;
-
- Item();
- Real hpos_f() const;
-
- virtual Line_of_score * line_l() const;
- virtual Paper_column * column_l () const;
-
- static int left_right_compare (Item const *, Item const*);
-
- Item (Item const &);
+ Item *find_prebroken_piece (Direction) const;
+ Grob *find_broken_piece (System *) const;
+ virtual System *get_system () const;
+ virtual Paper_column *get_column () const;
+ virtual void handle_prebroken_dependencies ();
+ static bool has_interface (Grob *);
protected:
- virtual void do_breakable_col_processing();
- virtual void handle_prebroken_dependencies();
- virtual void do_print() const;
- virtual void handle_prebroken_dependents ();
-
- void copy_breakable_items();
+ virtual void discretionary_processing ();
+ void copy_breakable_items ();
+ virtual SCM do_derived_mark () const;
};