release: 1.1.0

[lilypond.git] / lily / item.cc

diff --git a/lily/item.cc b/lily/item.cc
index 7c3b207eacf4e83a10f6c67843a56c818a9f3c8c..e48d576cfd524635a5416901d5c60db695e00527 100644 (file)
--- a/lily/item.cc
+++ b/lily/item.cc
@@ -3,39 +3,195 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+  (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
+#include "p-score.hh"
 #include "debug.hh"
 #include "item.hh"
 #include "p-col.hh"
+// #include "elem-group.hh"
+#include "spanner.hh"
 
-Item::Item()
+Item::Item ()
 {
-    pcol_l_ = 0;
+  unbroken_original_l_ =0;
+  break_priority_i_ = 0;
+  breakable_b_ = false;
+  break_status_dir_ = CENTER;
+  broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0;
 }
 
-IMPLEMENT_STATIC_NAME(Item);
+IMPLEMENT_IS_TYPE_B1(Item, Score_element);
 
 void
 Item::do_print() const
 {
 #ifndef NPRINT
-    mtor << "(unknown)";
+  DOUT << "breakable_b_: " << breakable_b_ << 
+    " break_status_dir_: " << break_status_dir_;
 #endif
 }
 
 
 Real 
-Item::hpos_f()const
+Item::hpos_f() const
 {
-    return pcol_l_->hpos + offset().x;
+  return absolute_coordinate (X_AXIS);
 }
 
+Line_of_score *
+Item::line_l() const
+{
+  Graphical_axis_group *ga = axis_group_l_a_[X_AXIS];
+  
+  if (!ga)
+    return 0;
+  
+  assert (dynamic_cast <Score_element *> (ga));
+  return dynamic_cast <Score_element *> (ga)-> line_l ();
+}
 
+Direction
+Item::break_status_dir() const
+{
+  return break_status_dir_;
+}
 
-Line_of_score *
-Item::line_l()const
+void
+Item::copy_breakable_items()
+{
+  if (broken_to_drul_[LEFT] || broken_to_drul_[RIGHT])
+    return;
+  Drul_array<Item *> new_copies;
+  Direction  i=LEFT;
+  do 
+    {
+      Item * item_p = dynamic_cast<Item*>(clone());
+
+      item_p->break_status_dir_ =  i;
+      pscore_l_->typeset_element (item_p);
+      item_p->handle_prebroken_dependencies();
+      new_copies[i] =item_p;
+    }
+  while (flip(&i) != LEFT);
+  broken_to_drul_= new_copies;
+}
+
+void
+Item::do_breakable_col_processing()
+{
+  if (!breakable_b_)
+    return;
+
+  if (!column_l ()->breakable_b_)
+    return;
+
+  copy_breakable_items();
+  handle_prebroken_dependencies();
+
+  /*
+    Otherwise the broken items won't be pre_process()'ed.
+  */
+  add_dependency (broken_to_drul_[LEFT]);
+  add_dependency (broken_to_drul_[RIGHT]);    
+}
+
+Item*
+Item::find_prebroken_piece (Line_of_score*l) const
+{
+  if (line_l() == l) 
+    return (Item*)this;
+  else if (broken_to_drul_[LEFT] && broken_to_drul_[LEFT]->line_l() == l)
+    return broken_to_drul_[LEFT];
+  else if (broken_to_drul_[RIGHT] && broken_to_drul_[RIGHT]->line_l() == l)
+    return broken_to_drul_[RIGHT];
+
+  return 0;
+}
+
+Item*
+Item::find_prebroken_piece (Direction breakstatus) const
+{
+  if (!breakstatus)
+    return (Item *) this;      // ugh
+  else
+    return (Item*) broken_to_drul_[breakstatus];
+}
+
+void
+Item::handle_prebroken_dependencies()
+{
+  if (breakable_b_)
+    Score_element::handle_prebroken_dependencies();
+}
+
+int
+Item::left_right_compare(Item const *l, Item const *r)
+{
+  while (!l->is_type_b (Paper_column::static_name ()))
+    l = dynamic_cast<Item*> (l->axis_group_l_a_[X_AXIS]);
+  while (!r->is_type_b (Paper_column::static_name ()))
+    r = dynamic_cast<Item*> (r->axis_group_l_a_[X_AXIS]);
+
+  Paper_column *p1 = (Paper_column*)l;
+  Paper_column* p2 = (Paper_column*)r;
+  return p1->rank_i () - p2->rank_i ();
+}
+
+
+bool
+Item::linked_b() const
+{
+  return Score_element::linked_b() || attached_span_l_arr_.size();
+}
+
+void
+Item::do_junk_links()
+{
+  attached_span_l_arr_.set_size(0);
+}
+
+void
+Item::do_unlink()
+{
+  Link_array<Spanner> attached=attached_span_l_arr_;
+  for (int i=0; i < attached.size (); i++)
+    {
+      Spanner *s= attached[i];
+
+      Direction d= LEFT;
+      do {
+       if (s->spanned_drul_[d] == this)
+         s->set_bounds (d, 0);
+       if (unbroken_original_l_
+           && unbroken_original_l_-> broken_to_drul_[d] == this)
+         unbroken_original_l_->broken_to_drul_[d] = 0;
+      } while (flip (&d) != LEFT);
+    }
+  assert (!attached_span_l_arr_.size ());
+  unbroken_original_l_ =0;
+}
+
+Paper_column *
+Item::column_l () const
+{
+  return dynamic_cast<Item*> (axis_group_l_a_[X_AXIS]) ->column_l ();
+}
+
+Item::Item (Item const &s)
+  : Score_element (s)
+{
+  unbroken_original_l_ = &s;
+  /* do not copy attached_span_l_arr_ */
+  breakable_b_ = s.breakable_b_;
+  broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
+  break_status_dir_ = s.break_status_dir_;
+  break_priority_i_ = s.break_priority_i_;
+}
+
+Item *
+Item::access_Item ()
 {
-    return pcol_l_->line_l_;
+  return this; 
 }