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
-
+ 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 virtual Score_element {
- void do_break ();
- void try_visibility_lambda ();
+class Item : public Score_element
+{
Drul_array<Item*> broken_to_drul_;
-
public:
+ VIRTUAL_COPY_CONS(Score_element);
+ Item (SCM);
+ Item (Item const &);
- /// I am really to be broken?
- bool breakable_b () const;
+ static bool breakable_b (Score_element*me);
bool broken_b () const;
Direction break_status_dir () const;
- Item * find_broken_piece (Direction) const;
+ Item * find_prebroken_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 &);
+ virtual void handle_prebroken_dependencies ();
protected:
- virtual void do_breakable_col_processing();
-
+ virtual void discretionary_processing ();
void copy_breakable_items();
};