+/*
+ item.hh -- declare Item
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
#ifndef ITEM_HH
#define ITEM_HH
-#include "glob.hh"
-#include "boxes.hh"
+
+#include "box.hh"
#include "string.hh"
-#include "staff-elem.hh"
+#include "score-element.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 Staff_elem {
+
+ 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
+{
+ Drul_array<Item*> broken_to_drul_;
+
public:
- /// indirection to the column it is in
- PCol * pcol_l_;
+ VIRTUAL_COPY_CONS(Score_element);
+ Item (SCM);
+ Item (Item const &);
- /* *************** */
- virtual Item *item() { return this; }
- Item();
- void do_print()const;
+ static bool breakable_b (Score_element*me);
+ bool broken_b () const;
+
+ Direction break_status_dir () const;
+
+ Item * find_prebroken_piece (Direction) const;
+ Score_element * find_broken_piece (Line_of_score*) const;
- NAME_MEMBERS(Item);
+ 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();
};
+
#endif