source file of the GNU LilyPond music typesetter
- (c) 1997--2000 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.
-
-
- Element properties
-
- visibility-lambda -- a function that takes the break
- direction and returns a (transparent, empty) cons
-
- breakable -- boolean indicating if this is a breakable item (clef,
- barline, key sig, etc.)
-
- */
-class Item : public Score_element
+*/
+class Item : public Grob
{
Drul_array<Item*> broken_to_drul_;
- void do_break ();
- void try_visibility_lambda ();
public:
- VIRTUAL_COPY_CONS(Score_element);
- Item();
+ VIRTUAL_COPY_CONS (Grob);
+ Item (SCM);
Item (Item const &);
- bool breakable_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;
-
- virtual Line_of_score * line_l() const;
- virtual Paper_column * column_l () 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();
- void copy_breakable_items();
+ virtual void discretionary_processing ();
+ void copy_breakable_items ();
+ virtual SCM do_derived_mark () const;
};