X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fitem.cc;h=525e1e1e2ab01f35d22eb93f1134d58b33b1effb;hb=1b071315c1d318e46035ec8bc0b73da55a025ae8;hp=e35ab294463451bdbe5dde17530f961744a6c3ff;hpb=d8018dfc750f1dee8e1ee78a5d5f51b06d4c8348;p=lilypond.git

diff --git a/lily/item.cc b/lily/item.cc
index e35ab29446..525e1e1e2a 100644
--- a/lily/item.cc
+++ b/lily/item.cc
@@ -1,33 +1,227 @@
 /*
   item.cc -- implement Item
 
-  source file of the LilyPond music typesetter
+  source file of the GNU LilyPond music typesetter
 
-  (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+  (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
+#include "p-score.hh"
 #include "debug.hh"
 #include "item.hh"
 #include "p-col.hh"
+#include "spanner.hh"
+#include "lily-guile.hh"
 
-Item::Item()
+Item::Item ()
 {
-    pcol_l_ = 0;
+  broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0;
 }
 
-IMPLEMENT_STATIC_NAME(Item);
+bool
+Item::breakable_b () const
+{
+  if (original_l_ )
+    return false;
+  
+  Item * i  =dynamic_cast<Item*> (parent_l (X_AXIS));
+  return (i) ?  i->breakable_b () : get_elt_property( breakable_scm_sym) != SCM_BOOL_F;
+}
 
 void
 Item::do_print() const
 {
-#ifndef NPRINT
-    mtor << "(unknown)";
-#endif
 }
 
 
 Real 
-Item::hpos_f()const
+Item::hpos_f() const
+{
+  return absolute_coordinate (X_AXIS);
+}
+
+Line_of_score *
+Item::line_l() const
+{
+  Graphical_element *g = parent_l (X_AXIS);
+  if (!g)
+    return 0;
+  return dynamic_cast<Score_element *> (g)-> line_l ();
+}
+
+
+void
+Item::copy_breakable_items()
+{
+  if (broken_to_drul_[LEFT] || broken_to_drul_[RIGHT] 
+      || ! breakable_b ())
+    return;
+
+  Drul_array<Item *> new_copies;
+  Direction  i=LEFT;
+  do 
+    {
+      Score_element * dolly = clone();
+      Item * item_p = dynamic_cast<Item*>(dolly);
+      pscore_l_->typeset_element (item_p);
+      new_copies[i] =item_p;
+    }
+  while (flip(&i) != LEFT);
+  broken_to_drul_= new_copies;
+
+  do 
+    {
+       broken_to_drul_[i]->handle_prebroken_dependencies();
+       broken_to_drul_[i]->try_visibility_lambda();
+    }
+  while (flip(&i) != LEFT);
+  try_visibility_lambda ();
+}
+
+void
+Item::try_visibility_lambda ()
+{
+  SCM vis = remove_elt_property (visibility_lambda_scm_sym);
+  if (vis != SCM_BOOL_F)
+    {
+      SCM args = scm_listify (gh_int2scm (break_status_dir ()), SCM_UNDEFINED);
+      SCM result = gh_apply ( SCM_CDR(vis), args);
+      int trans = gh_scm2bool (gh_car (result));
+      int empty = gh_scm2bool (gh_cdr (result));
+
+      if (empty)
+	set_empty (true);
+      if (trans)
+	set_elt_property (transparent_scm_sym, SCM_BOOL_T);
+    }
+}
+
+void
+Item::do_break ()
+{
+  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]);
+}
+
+void
+Item::do_breakable_col_processing()
+{
+  if (breakable_b ())
+    do_break ();
+
+}
+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 d) const
+{
+  if (!d)
+    return (Item *) (this);	// ugh
+  else
+    return dynamic_cast<Item*> (broken_to_drul_[d]);
+}
+
+void
+Item::handle_prebroken_dependencies()
+{
+  if (original_l_)
+    Score_element::handle_prebroken_dependencies();
+}
+
+bool
+Item::broken_original_b () const
+{
+  return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT];
+}
+
+int
+Item::left_right_compare(Item const *l, Item const *r)
+{
+  Paper_column *p1 = l->column_l ();
+  Paper_column* p2 = r->column_l ();
+  return p1->rank_i () - p2->rank_i ();
+}
+
+Paper_column *
+Item::column_l () const
 {
-    return pcol_l_->hpos + offset().x;
+  return dynamic_cast<Item*> (parent_l (X_AXIS))->column_l ();
+}
+
+Item::Item (Item const &s)
+  : Score_element (s)
+{
+  broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0;
+}
+
+
+void
+Item::handle_prebroken_dependents ()
+{
+  Item * parent =  dynamic_cast<Item*> (parent_l (X_AXIS));
+  if (breakable_b () && parent)
+    {
+       if(!(broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]))
+	do_break ();
+
+      Direction d = LEFT;
+      do
+	{
+	  Item * broken_self = find_prebroken_piece (d);
+	  Item * broken_parent = parent->find_prebroken_piece (d);
+
+	  broken_self->dim_cache_[X_AXIS].parent_l_ =
+	    &broken_parent->dim_cache_[X_AXIS];
+
+	  /*
+	    ugh. Should do this is after breaking?
+	   */
+	  if (!broken_self->parent_l (Y_AXIS))
+	    {
+	      Score_element * yparent =dynamic_cast<Score_element*>(parent_l (Y_AXIS));
+	      Item *yparenti = dynamic_cast<Item*> (yparent);
+	      Item *broken_yparent = yparenti ?
+		yparenti->find_prebroken_piece (d) : 0;
+	      
+	      if (!yparent)
+		programming_error ("Vertical refpoint lost!");
+	      else if (yparenti)
+		{
+		  broken_self->dim_cache_[Y_AXIS].parent_l_ =
+		    &broken_yparent->dim_cache_[Y_AXIS];
+		}
+	    }
+	}
+      while ((flip (&d))!=LEFT);
+    }
+}
+
+Direction
+Item::break_status_dir () const
+{
+  if (original_l_)
+    {
+      Item * i = dynamic_cast<Item*> (original_l_);
+
+      return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT;
+    }
+  else
+    return CENTER;
 }