release: 1.3.28

[lilypond.git] / lily / include / item.hh

diff --git a/lily/include/item.hh b/lily/include/item.hh
index d1fc8c8bfa7985288772b7f201d54e894ac42b43..c4b3dfbad3d6ca56efe42be084b1de3def0a7e2b 100644 (file)
--- a/lily/include/item.hh
+++ b/lily/include/item.hh
@@ -1,13 +1,22 @@
+/*
+  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
@@ -15,18 +24,54 @@
   NB. This doesn't mean an Item has to initialize the output field before
   spacing calculation. 
   
-*/
-struct Item : Staff_elem {
-    /// indirection to the column it is in
-    PCol * pcol_l_;
 
-    /* *************** */
-    virtual Item *item() { return this; }
-    Item();
-    void do_print()const;
+  
+  @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 ();
+public:
+  /*
+    ugh.
+   */
+  Drul_array<Item*> broken_to_drul_;
+
+
+public:
 
-    NAME_MEMBERS(Item);
+  /// I am really to be broken?
+  bool breakable_b () const;
+  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 &);
+protected:
+  virtual void do_breakable_col_processing();
+
+  void copy_breakable_items();
 };
 
 
+
 #endif